YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | BlueZ - Bluetooth protocol stack for Linux |
| 3 | Copyright (C) 2000-2001 Qualcomm Incorporated |
Gustavo F. Padovan | ce5706b | 2010-07-13 11:57:11 -0300 | [diff] [blame] | 4 | Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org> |
Gustavo F. Padovan | 5d8868f | 2010-07-16 16:18:39 -0300 | [diff] [blame] | 5 | Copyright (C) 2010 Google Inc. |
Gustavo F. Padovan | 590051d | 2011-12-18 13:39:33 -0200 | [diff] [blame] | 6 | Copyright (C) 2011 ProFUSION Embedded Systems |
Mat Martineau | 422e925 | 2012-04-27 16:50:55 -0700 | [diff] [blame] | 7 | Copyright (c) 2012 Code Aurora Forum. All rights reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | |
| 9 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> |
| 10 | |
| 11 | This program is free software; you can redistribute it and/or modify |
| 12 | it under the terms of the GNU General Public License version 2 as |
| 13 | published by the Free Software Foundation; |
| 14 | |
| 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| 16 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. |
| 18 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 19 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
| 20 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 21 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 23 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 24 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
| 25 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | SOFTWARE IS DISCLAIMED. |
| 27 | */ |
| 28 | |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 29 | /* Bluetooth L2CAP core. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <linux/module.h> |
| 32 | |
| 33 | #include <linux/types.h> |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 34 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <linux/errno.h> |
| 36 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include <linux/sched.h> |
| 38 | #include <linux/slab.h> |
| 39 | #include <linux/poll.h> |
| 40 | #include <linux/fcntl.h> |
| 41 | #include <linux/init.h> |
| 42 | #include <linux/interrupt.h> |
| 43 | #include <linux/socket.h> |
| 44 | #include <linux/skbuff.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include <linux/list.h> |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 46 | #include <linux/device.h> |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 47 | #include <linux/debugfs.h> |
| 48 | #include <linux/seq_file.h> |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 49 | #include <linux/uaccess.h> |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 50 | #include <linux/crc16.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | #include <net/sock.h> |
| 52 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | #include <asm/unaligned.h> |
| 54 | |
| 55 | #include <net/bluetooth/bluetooth.h> |
| 56 | #include <net/bluetooth/hci_core.h> |
| 57 | #include <net/bluetooth/l2cap.h> |
Anderson Briglia | b501d6a | 2011-06-07 18:46:31 -0300 | [diff] [blame] | 58 | #include <net/bluetooth/smp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
Rusty Russell | eb93992 | 2011-12-19 14:08:01 +0000 | [diff] [blame] | 60 | bool disable_ertm; |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 61 | |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 62 | static u32 l2cap_feat_mask = L2CAP_FEAT_FIXED_CHAN; |
Mat Martineau | 50a147c | 2011-11-02 16:18:34 -0700 | [diff] [blame] | 63 | static u8 l2cap_fixed_chan[8] = { L2CAP_FC_L2CAP, }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | |
Johannes Berg | b5ad8b7 | 2011-06-01 08:54:45 +0200 | [diff] [blame] | 65 | static LIST_HEAD(chan_list); |
| 66 | static DEFINE_RWLOCK(chan_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, |
| 69 | u8 code, u8 ident, u16 dlen, void *data); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 70 | static void l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, |
| 71 | void *data); |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 72 | static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 73 | static void l2cap_send_disconn_req(struct l2cap_conn *conn, |
| 74 | struct l2cap_chan *chan, int err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 76 | /* ---- L2CAP channels ---- */ |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 77 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 78 | static struct l2cap_chan *__l2cap_get_chan_by_dcid(struct l2cap_conn *conn, u16 cid) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 79 | { |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 80 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 81 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 82 | list_for_each_entry(c, &conn->chan_l, list) { |
| 83 | if (c->dcid == cid) |
| 84 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 85 | } |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 86 | return NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 87 | } |
| 88 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 89 | static struct l2cap_chan *__l2cap_get_chan_by_scid(struct l2cap_conn *conn, u16 cid) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 90 | { |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 91 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 92 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 93 | list_for_each_entry(c, &conn->chan_l, list) { |
| 94 | if (c->scid == cid) |
| 95 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 96 | } |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 97 | return NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 98 | } |
| 99 | |
| 100 | /* Find channel with given SCID. |
Mat Martineau | ef191ad | 2012-05-02 09:42:00 -0700 | [diff] [blame^] | 101 | * Returns locked channel. */ |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 102 | static struct l2cap_chan *l2cap_get_chan_by_scid(struct l2cap_conn *conn, u16 cid) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 103 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 104 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 105 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 106 | mutex_lock(&conn->chan_lock); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 107 | c = __l2cap_get_chan_by_scid(conn, cid); |
Mat Martineau | ef191ad | 2012-05-02 09:42:00 -0700 | [diff] [blame^] | 108 | if (c) |
| 109 | l2cap_chan_lock(c); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 110 | mutex_unlock(&conn->chan_lock); |
| 111 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 112 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 113 | } |
| 114 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 115 | static struct l2cap_chan *__l2cap_get_chan_by_ident(struct l2cap_conn *conn, u8 ident) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 116 | { |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 117 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 118 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 119 | list_for_each_entry(c, &conn->chan_l, list) { |
| 120 | if (c->ident == ident) |
| 121 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 122 | } |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 123 | return NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 124 | } |
| 125 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 126 | static struct l2cap_chan *__l2cap_global_chan_by_addr(__le16 psm, bdaddr_t *src) |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 127 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 128 | struct l2cap_chan *c; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 129 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 130 | list_for_each_entry(c, &chan_list, global_l) { |
| 131 | if (c->sport == psm && !bacmp(&bt_sk(c->sk)->src, src)) |
Szymon Janc | 250938c | 2011-11-16 09:32:22 +0100 | [diff] [blame] | 132 | return c; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 133 | } |
Szymon Janc | 250938c | 2011-11-16 09:32:22 +0100 | [diff] [blame] | 134 | return NULL; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 135 | } |
| 136 | |
| 137 | int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm) |
| 138 | { |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 139 | int err; |
| 140 | |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 141 | write_lock(&chan_list_lock); |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 142 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 143 | if (psm && __l2cap_global_chan_by_addr(psm, src)) { |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 144 | err = -EADDRINUSE; |
| 145 | goto done; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 146 | } |
| 147 | |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 148 | if (psm) { |
| 149 | chan->psm = psm; |
| 150 | chan->sport = psm; |
| 151 | err = 0; |
| 152 | } else { |
| 153 | u16 p; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 154 | |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 155 | err = -EINVAL; |
| 156 | for (p = 0x1001; p < 0x1100; p += 2) |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 157 | if (!__l2cap_global_chan_by_addr(cpu_to_le16(p), src)) { |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 158 | chan->psm = cpu_to_le16(p); |
| 159 | chan->sport = cpu_to_le16(p); |
| 160 | err = 0; |
| 161 | break; |
| 162 | } |
| 163 | } |
| 164 | |
| 165 | done: |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 166 | write_unlock(&chan_list_lock); |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 167 | return err; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 168 | } |
| 169 | |
| 170 | int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid) |
| 171 | { |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 172 | write_lock(&chan_list_lock); |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 173 | |
| 174 | chan->scid = scid; |
| 175 | |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 176 | write_unlock(&chan_list_lock); |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 177 | |
| 178 | return 0; |
| 179 | } |
| 180 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 181 | static u16 l2cap_alloc_cid(struct l2cap_conn *conn) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 182 | { |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 183 | u16 cid = L2CAP_CID_DYN_START; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 184 | |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 185 | for (; cid < L2CAP_CID_DYN_END; cid++) { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 186 | if (!__l2cap_get_chan_by_scid(conn, cid)) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 187 | return cid; |
| 188 | } |
| 189 | |
| 190 | return 0; |
| 191 | } |
| 192 | |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 193 | static void __l2cap_state_change(struct l2cap_chan *chan, int state) |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 194 | { |
Andrei Emeltchenko | 42d2d87 | 2012-02-17 11:40:57 +0200 | [diff] [blame] | 195 | BT_DBG("chan %p %s -> %s", chan, state_to_string(chan->state), |
Gustavo F. Padovan | badaaa0 | 2011-11-23 20:11:46 -0200 | [diff] [blame] | 196 | state_to_string(state)); |
| 197 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 198 | chan->state = state; |
| 199 | chan->ops->state_change(chan->data, state); |
| 200 | } |
| 201 | |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 202 | static void l2cap_state_change(struct l2cap_chan *chan, int state) |
| 203 | { |
| 204 | struct sock *sk = chan->sk; |
| 205 | |
| 206 | lock_sock(sk); |
| 207 | __l2cap_state_change(chan, state); |
| 208 | release_sock(sk); |
| 209 | } |
| 210 | |
Andrei Emeltchenko | 2e0052e | 2012-02-21 12:54:58 +0200 | [diff] [blame] | 211 | static inline void __l2cap_chan_set_err(struct l2cap_chan *chan, int err) |
| 212 | { |
| 213 | struct sock *sk = chan->sk; |
| 214 | |
| 215 | sk->sk_err = err; |
| 216 | } |
| 217 | |
| 218 | static inline void l2cap_chan_set_err(struct l2cap_chan *chan, int err) |
| 219 | { |
| 220 | struct sock *sk = chan->sk; |
| 221 | |
| 222 | lock_sock(sk); |
| 223 | __l2cap_chan_set_err(chan, err); |
| 224 | release_sock(sk); |
| 225 | } |
| 226 | |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 227 | /* ---- L2CAP sequence number lists ---- */ |
| 228 | |
| 229 | /* For ERTM, ordered lists of sequence numbers must be tracked for |
| 230 | * SREJ requests that are received and for frames that are to be |
| 231 | * retransmitted. These seq_list functions implement a singly-linked |
| 232 | * list in an array, where membership in the list can also be checked |
| 233 | * in constant time. Items can also be added to the tail of the list |
| 234 | * and removed from the head in constant time, without further memory |
| 235 | * allocs or frees. |
| 236 | */ |
| 237 | |
| 238 | static int l2cap_seq_list_init(struct l2cap_seq_list *seq_list, u16 size) |
| 239 | { |
| 240 | size_t alloc_size, i; |
| 241 | |
| 242 | /* Allocated size is a power of 2 to map sequence numbers |
| 243 | * (which may be up to 14 bits) in to a smaller array that is |
| 244 | * sized for the negotiated ERTM transmit windows. |
| 245 | */ |
| 246 | alloc_size = roundup_pow_of_two(size); |
| 247 | |
| 248 | seq_list->list = kmalloc(sizeof(u16) * alloc_size, GFP_KERNEL); |
| 249 | if (!seq_list->list) |
| 250 | return -ENOMEM; |
| 251 | |
| 252 | seq_list->mask = alloc_size - 1; |
| 253 | seq_list->head = L2CAP_SEQ_LIST_CLEAR; |
| 254 | seq_list->tail = L2CAP_SEQ_LIST_CLEAR; |
| 255 | for (i = 0; i < alloc_size; i++) |
| 256 | seq_list->list[i] = L2CAP_SEQ_LIST_CLEAR; |
| 257 | |
| 258 | return 0; |
| 259 | } |
| 260 | |
| 261 | static inline void l2cap_seq_list_free(struct l2cap_seq_list *seq_list) |
| 262 | { |
| 263 | kfree(seq_list->list); |
| 264 | } |
| 265 | |
| 266 | static inline bool l2cap_seq_list_contains(struct l2cap_seq_list *seq_list, |
| 267 | u16 seq) |
| 268 | { |
| 269 | /* Constant-time check for list membership */ |
| 270 | return seq_list->list[seq & seq_list->mask] != L2CAP_SEQ_LIST_CLEAR; |
| 271 | } |
| 272 | |
| 273 | static u16 l2cap_seq_list_remove(struct l2cap_seq_list *seq_list, u16 seq) |
| 274 | { |
| 275 | u16 mask = seq_list->mask; |
| 276 | |
| 277 | if (seq_list->head == L2CAP_SEQ_LIST_CLEAR) { |
| 278 | /* In case someone tries to pop the head of an empty list */ |
| 279 | return L2CAP_SEQ_LIST_CLEAR; |
| 280 | } else if (seq_list->head == seq) { |
| 281 | /* Head can be removed in constant time */ |
| 282 | seq_list->head = seq_list->list[seq & mask]; |
| 283 | seq_list->list[seq & mask] = L2CAP_SEQ_LIST_CLEAR; |
| 284 | |
| 285 | if (seq_list->head == L2CAP_SEQ_LIST_TAIL) { |
| 286 | seq_list->head = L2CAP_SEQ_LIST_CLEAR; |
| 287 | seq_list->tail = L2CAP_SEQ_LIST_CLEAR; |
| 288 | } |
| 289 | } else { |
| 290 | /* Walk the list to find the sequence number */ |
| 291 | u16 prev = seq_list->head; |
| 292 | while (seq_list->list[prev & mask] != seq) { |
| 293 | prev = seq_list->list[prev & mask]; |
| 294 | if (prev == L2CAP_SEQ_LIST_TAIL) |
| 295 | return L2CAP_SEQ_LIST_CLEAR; |
| 296 | } |
| 297 | |
| 298 | /* Unlink the number from the list and clear it */ |
| 299 | seq_list->list[prev & mask] = seq_list->list[seq & mask]; |
| 300 | seq_list->list[seq & mask] = L2CAP_SEQ_LIST_CLEAR; |
| 301 | if (seq_list->tail == seq) |
| 302 | seq_list->tail = prev; |
| 303 | } |
| 304 | return seq; |
| 305 | } |
| 306 | |
| 307 | static inline u16 l2cap_seq_list_pop(struct l2cap_seq_list *seq_list) |
| 308 | { |
| 309 | /* Remove the head in constant time */ |
| 310 | return l2cap_seq_list_remove(seq_list, seq_list->head); |
| 311 | } |
| 312 | |
| 313 | static void l2cap_seq_list_clear(struct l2cap_seq_list *seq_list) |
| 314 | { |
Gustavo Padovan | f522ae3 | 2012-05-09 18:28:00 -0300 | [diff] [blame] | 315 | u16 i; |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 316 | |
Gustavo Padovan | f522ae3 | 2012-05-09 18:28:00 -0300 | [diff] [blame] | 317 | if (seq_list->head == L2CAP_SEQ_LIST_CLEAR) |
| 318 | return; |
| 319 | |
| 320 | for (i = 0; i <= seq_list->mask; i++) |
| 321 | seq_list->list[i] = L2CAP_SEQ_LIST_CLEAR; |
| 322 | |
| 323 | seq_list->head = L2CAP_SEQ_LIST_CLEAR; |
| 324 | seq_list->tail = L2CAP_SEQ_LIST_CLEAR; |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 325 | } |
| 326 | |
| 327 | static void l2cap_seq_list_append(struct l2cap_seq_list *seq_list, u16 seq) |
| 328 | { |
| 329 | u16 mask = seq_list->mask; |
| 330 | |
| 331 | /* All appends happen in constant time */ |
| 332 | |
Gustavo Padovan | f522ae3 | 2012-05-09 18:28:00 -0300 | [diff] [blame] | 333 | if (seq_list->list[seq & mask] != L2CAP_SEQ_LIST_CLEAR) |
| 334 | return; |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 335 | |
Gustavo Padovan | f522ae3 | 2012-05-09 18:28:00 -0300 | [diff] [blame] | 336 | if (seq_list->tail == L2CAP_SEQ_LIST_CLEAR) |
| 337 | seq_list->head = seq; |
| 338 | else |
| 339 | seq_list->list[seq_list->tail & mask] = seq; |
| 340 | |
| 341 | seq_list->tail = seq; |
| 342 | seq_list->list[seq & mask] = L2CAP_SEQ_LIST_TAIL; |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 343 | } |
| 344 | |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 345 | static void l2cap_chan_timeout(struct work_struct *work) |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 346 | { |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 347 | struct l2cap_chan *chan = container_of(work, struct l2cap_chan, |
| 348 | chan_timer.work); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 349 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 350 | int reason; |
| 351 | |
Andrei Emeltchenko | e05dcc3 | 2012-02-17 11:40:56 +0200 | [diff] [blame] | 352 | BT_DBG("chan %p state %s", chan, state_to_string(chan->state)); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 353 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 354 | mutex_lock(&conn->chan_lock); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 355 | l2cap_chan_lock(chan); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 356 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 357 | if (chan->state == BT_CONNECTED || chan->state == BT_CONFIG) |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 358 | reason = ECONNREFUSED; |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 359 | else if (chan->state == BT_CONNECT && |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 360 | chan->sec_level != BT_SECURITY_SDP) |
| 361 | reason = ECONNREFUSED; |
| 362 | else |
| 363 | reason = ETIMEDOUT; |
| 364 | |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 365 | l2cap_chan_close(chan, reason); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 366 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 367 | l2cap_chan_unlock(chan); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 368 | |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 369 | chan->ops->close(chan->data); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 370 | mutex_unlock(&conn->chan_lock); |
| 371 | |
Ulisses Furquim | 371fd83 | 2011-12-21 20:02:36 -0200 | [diff] [blame] | 372 | l2cap_chan_put(chan); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 373 | } |
| 374 | |
Gustavo Padovan | eef1d9b | 2012-03-25 13:59:16 -0300 | [diff] [blame] | 375 | struct l2cap_chan *l2cap_chan_create(void) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 376 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 377 | struct l2cap_chan *chan; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 378 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 379 | chan = kzalloc(sizeof(*chan), GFP_ATOMIC); |
| 380 | if (!chan) |
| 381 | return NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 382 | |
Andrei Emeltchenko | c03b355 | 2012-02-21 12:54:56 +0200 | [diff] [blame] | 383 | mutex_init(&chan->lock); |
| 384 | |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 385 | write_lock(&chan_list_lock); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 386 | list_add(&chan->global_l, &chan_list); |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 387 | write_unlock(&chan_list_lock); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 388 | |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 389 | INIT_DELAYED_WORK(&chan->chan_timer, l2cap_chan_timeout); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 390 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 391 | chan->state = BT_OPEN; |
| 392 | |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 393 | atomic_set(&chan->refcnt, 1); |
| 394 | |
Gustavo Padovan | eef1d9b | 2012-03-25 13:59:16 -0300 | [diff] [blame] | 395 | BT_DBG("chan %p", chan); |
Szymon Janc | abc545b | 2011-11-03 16:05:44 +0100 | [diff] [blame] | 396 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 397 | return chan; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 398 | } |
| 399 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 400 | void l2cap_chan_destroy(struct l2cap_chan *chan) |
Gustavo F. Padovan | 6ff5abb | 2011-04-25 15:10:41 -0300 | [diff] [blame] | 401 | { |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 402 | write_lock(&chan_list_lock); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 403 | list_del(&chan->global_l); |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 404 | write_unlock(&chan_list_lock); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 405 | |
Ulisses Furquim | 371fd83 | 2011-12-21 20:02:36 -0200 | [diff] [blame] | 406 | l2cap_chan_put(chan); |
Gustavo F. Padovan | 6ff5abb | 2011-04-25 15:10:41 -0300 | [diff] [blame] | 407 | } |
| 408 | |
Andrei Emeltchenko | bd4b165 | 2012-03-28 16:31:25 +0300 | [diff] [blame] | 409 | void l2cap_chan_set_defaults(struct l2cap_chan *chan) |
| 410 | { |
| 411 | chan->fcs = L2CAP_FCS_CRC16; |
| 412 | chan->max_tx = L2CAP_DEFAULT_MAX_TX; |
| 413 | chan->tx_win = L2CAP_DEFAULT_TX_WINDOW; |
| 414 | chan->tx_win_max = L2CAP_DEFAULT_TX_WINDOW; |
| 415 | chan->sec_level = BT_SECURITY_LOW; |
| 416 | |
| 417 | set_bit(FLAG_FORCE_ACTIVE, &chan->flags); |
| 418 | } |
| 419 | |
Andrei Emeltchenko | 14a2849 | 2012-03-23 16:31:49 +0200 | [diff] [blame] | 420 | static void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 421 | { |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 422 | BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, |
Andrei Emeltchenko | 097db76 | 2012-03-09 14:16:17 +0200 | [diff] [blame] | 423 | __le16_to_cpu(chan->psm), chan->dcid); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 424 | |
Andrei Emeltchenko | 9f5a0d7 | 2011-11-07 14:20:25 +0200 | [diff] [blame] | 425 | conn->disc_reason = HCI_ERROR_REMOTE_USER_TERM; |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 426 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 427 | chan->conn = conn; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 428 | |
Andrei Emeltchenko | 5491120 | 2012-02-06 15:04:00 +0200 | [diff] [blame] | 429 | switch (chan->chan_type) { |
| 430 | case L2CAP_CHAN_CONN_ORIENTED: |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 431 | if (conn->hcon->type == LE_LINK) { |
| 432 | /* LE connection */ |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 433 | chan->omtu = L2CAP_LE_DEFAULT_MTU; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 434 | chan->scid = L2CAP_CID_LE_DATA; |
| 435 | chan->dcid = L2CAP_CID_LE_DATA; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 436 | } else { |
| 437 | /* Alloc CID for connection-oriented socket */ |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 438 | chan->scid = l2cap_alloc_cid(conn); |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 439 | chan->omtu = L2CAP_DEFAULT_MTU; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 440 | } |
Andrei Emeltchenko | 5491120 | 2012-02-06 15:04:00 +0200 | [diff] [blame] | 441 | break; |
| 442 | |
| 443 | case L2CAP_CHAN_CONN_LESS: |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 444 | /* Connectionless socket */ |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 445 | chan->scid = L2CAP_CID_CONN_LESS; |
| 446 | chan->dcid = L2CAP_CID_CONN_LESS; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 447 | chan->omtu = L2CAP_DEFAULT_MTU; |
Andrei Emeltchenko | 5491120 | 2012-02-06 15:04:00 +0200 | [diff] [blame] | 448 | break; |
| 449 | |
| 450 | default: |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 451 | /* Raw socket can send/recv signalling messages only */ |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 452 | chan->scid = L2CAP_CID_SIGNALING; |
| 453 | chan->dcid = L2CAP_CID_SIGNALING; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 454 | chan->omtu = L2CAP_DEFAULT_MTU; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 455 | } |
| 456 | |
Andrei Emeltchenko | 8f7975b | 2011-10-13 16:18:54 +0300 | [diff] [blame] | 457 | chan->local_id = L2CAP_BESTEFFORT_ID; |
| 458 | chan->local_stype = L2CAP_SERV_BESTEFFORT; |
| 459 | chan->local_msdu = L2CAP_DEFAULT_MAX_SDU_SIZE; |
| 460 | chan->local_sdu_itime = L2CAP_DEFAULT_SDU_ITIME; |
| 461 | chan->local_acc_lat = L2CAP_DEFAULT_ACC_LAT; |
| 462 | chan->local_flush_to = L2CAP_DEFAULT_FLUSH_TO; |
| 463 | |
Ulisses Furquim | 371fd83 | 2011-12-21 20:02:36 -0200 | [diff] [blame] | 464 | l2cap_chan_hold(chan); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 465 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 466 | list_add(&chan->list, &conn->chan_l); |
Andrei Emeltchenko | 643162a | 2012-02-22 17:11:55 +0200 | [diff] [blame] | 467 | } |
| 468 | |
Andrei Emeltchenko | 14a2849 | 2012-03-23 16:31:49 +0200 | [diff] [blame] | 469 | static void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan) |
Andrei Emeltchenko | 643162a | 2012-02-22 17:11:55 +0200 | [diff] [blame] | 470 | { |
| 471 | mutex_lock(&conn->chan_lock); |
| 472 | __l2cap_chan_add(conn, chan); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 473 | mutex_unlock(&conn->chan_lock); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 474 | } |
| 475 | |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 476 | static void l2cap_chan_del(struct l2cap_chan *chan, int err) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 477 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 478 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 479 | struct l2cap_conn *conn = chan->conn; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 480 | struct sock *parent = bt_sk(sk)->parent; |
| 481 | |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 482 | __clear_chan_timer(chan); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 483 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 484 | BT_DBG("chan %p, conn %p, err %d", chan, conn, err); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 485 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 486 | if (conn) { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 487 | /* Delete from channel list */ |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 488 | list_del(&chan->list); |
Gustavo F. Padovan | 3d57dc6 | 2011-12-17 10:56:45 -0200 | [diff] [blame] | 489 | |
Ulisses Furquim | 371fd83 | 2011-12-21 20:02:36 -0200 | [diff] [blame] | 490 | l2cap_chan_put(chan); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 491 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 492 | chan->conn = NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 493 | hci_conn_put(conn->hcon); |
| 494 | } |
| 495 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 496 | lock_sock(sk); |
| 497 | |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 498 | __l2cap_state_change(chan, BT_CLOSED); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 499 | sock_set_flag(sk, SOCK_ZAPPED); |
| 500 | |
| 501 | if (err) |
Andrei Emeltchenko | 2e0052e | 2012-02-21 12:54:58 +0200 | [diff] [blame] | 502 | __l2cap_chan_set_err(chan, err); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 503 | |
| 504 | if (parent) { |
| 505 | bt_accept_unlink(sk); |
| 506 | parent->sk_data_ready(parent, 0); |
| 507 | } else |
| 508 | sk->sk_state_change(sk); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 509 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 510 | release_sock(sk); |
| 511 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 512 | if (!(test_bit(CONF_OUTPUT_DONE, &chan->conf_state) && |
| 513 | test_bit(CONF_INPUT_DONE, &chan->conf_state))) |
Gustavo F. Padovan | 6ff5abb | 2011-04-25 15:10:41 -0300 | [diff] [blame] | 514 | return; |
Gustavo F. Padovan | 2ead70b | 2011-04-01 15:13:36 -0300 | [diff] [blame] | 515 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 516 | skb_queue_purge(&chan->tx_q); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 517 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 518 | if (chan->mode == L2CAP_MODE_ERTM) { |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 519 | struct srej_list *l, *tmp; |
| 520 | |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 521 | __clear_retrans_timer(chan); |
| 522 | __clear_monitor_timer(chan); |
| 523 | __clear_ack_timer(chan); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 524 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 525 | skb_queue_purge(&chan->srej_q); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 526 | |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 527 | l2cap_seq_list_free(&chan->srej_list); |
| 528 | l2cap_seq_list_free(&chan->retrans_list); |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 529 | list_for_each_entry_safe(l, tmp, &chan->srej_l, list) { |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 530 | list_del(&l->list); |
| 531 | kfree(l); |
| 532 | } |
| 533 | } |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 534 | } |
| 535 | |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 536 | static void l2cap_chan_cleanup_listen(struct sock *parent) |
| 537 | { |
| 538 | struct sock *sk; |
| 539 | |
| 540 | BT_DBG("parent %p", parent); |
| 541 | |
| 542 | /* Close not yet accepted channels */ |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 543 | while ((sk = bt_accept_dequeue(parent, NULL))) { |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 544 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 545 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 546 | l2cap_chan_lock(chan); |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 547 | __clear_chan_timer(chan); |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 548 | l2cap_chan_close(chan, ECONNRESET); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 549 | l2cap_chan_unlock(chan); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 550 | |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 551 | chan->ops->close(chan->data); |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 552 | } |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 553 | } |
| 554 | |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 555 | void l2cap_chan_close(struct l2cap_chan *chan, int reason) |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 556 | { |
| 557 | struct l2cap_conn *conn = chan->conn; |
| 558 | struct sock *sk = chan->sk; |
| 559 | |
Andrei Emeltchenko | e05dcc3 | 2012-02-17 11:40:56 +0200 | [diff] [blame] | 560 | BT_DBG("chan %p state %s sk %p", chan, |
| 561 | state_to_string(chan->state), sk); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 562 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 563 | switch (chan->state) { |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 564 | case BT_LISTEN: |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 565 | lock_sock(sk); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 566 | l2cap_chan_cleanup_listen(sk); |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 567 | |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 568 | __l2cap_state_change(chan, BT_CLOSED); |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 569 | sock_set_flag(sk, SOCK_ZAPPED); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 570 | release_sock(sk); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 571 | break; |
| 572 | |
| 573 | case BT_CONNECTED: |
| 574 | case BT_CONFIG: |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 575 | if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 576 | conn->hcon->type == ACL_LINK) { |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 577 | __set_chan_timer(chan, sk->sk_sndtimeo); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 578 | l2cap_send_disconn_req(conn, chan, reason); |
| 579 | } else |
| 580 | l2cap_chan_del(chan, reason); |
| 581 | break; |
| 582 | |
| 583 | case BT_CONNECT2: |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 584 | if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 585 | conn->hcon->type == ACL_LINK) { |
| 586 | struct l2cap_conn_rsp rsp; |
| 587 | __u16 result; |
| 588 | |
| 589 | if (bt_sk(sk)->defer_setup) |
| 590 | result = L2CAP_CR_SEC_BLOCK; |
| 591 | else |
| 592 | result = L2CAP_CR_BAD_PSM; |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 593 | l2cap_state_change(chan, BT_DISCONN); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 594 | |
| 595 | rsp.scid = cpu_to_le16(chan->dcid); |
| 596 | rsp.dcid = cpu_to_le16(chan->scid); |
| 597 | rsp.result = cpu_to_le16(result); |
| 598 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 599 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, |
| 600 | sizeof(rsp), &rsp); |
| 601 | } |
| 602 | |
| 603 | l2cap_chan_del(chan, reason); |
| 604 | break; |
| 605 | |
| 606 | case BT_CONNECT: |
| 607 | case BT_DISCONN: |
| 608 | l2cap_chan_del(chan, reason); |
| 609 | break; |
| 610 | |
| 611 | default: |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 612 | lock_sock(sk); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 613 | sock_set_flag(sk, SOCK_ZAPPED); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 614 | release_sock(sk); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 615 | break; |
| 616 | } |
| 617 | } |
| 618 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 619 | static inline u8 l2cap_get_auth_type(struct l2cap_chan *chan) |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 620 | { |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 621 | if (chan->chan_type == L2CAP_CHAN_RAW) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 622 | switch (chan->sec_level) { |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 623 | case BT_SECURITY_HIGH: |
| 624 | return HCI_AT_DEDICATED_BONDING_MITM; |
| 625 | case BT_SECURITY_MEDIUM: |
| 626 | return HCI_AT_DEDICATED_BONDING; |
| 627 | default: |
| 628 | return HCI_AT_NO_BONDING; |
| 629 | } |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 630 | } else if (chan->psm == cpu_to_le16(0x0001)) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 631 | if (chan->sec_level == BT_SECURITY_LOW) |
| 632 | chan->sec_level = BT_SECURITY_SDP; |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 633 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 634 | if (chan->sec_level == BT_SECURITY_HIGH) |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 635 | return HCI_AT_NO_BONDING_MITM; |
| 636 | else |
| 637 | return HCI_AT_NO_BONDING; |
| 638 | } else { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 639 | switch (chan->sec_level) { |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 640 | case BT_SECURITY_HIGH: |
| 641 | return HCI_AT_GENERAL_BONDING_MITM; |
| 642 | case BT_SECURITY_MEDIUM: |
| 643 | return HCI_AT_GENERAL_BONDING; |
| 644 | default: |
| 645 | return HCI_AT_NO_BONDING; |
| 646 | } |
| 647 | } |
| 648 | } |
| 649 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 650 | /* Service level security */ |
Gustavo F. Padovan | d45fc42 | 2011-11-05 19:54:24 -0200 | [diff] [blame] | 651 | int l2cap_chan_check_security(struct l2cap_chan *chan) |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 652 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 653 | struct l2cap_conn *conn = chan->conn; |
Marcel Holtmann | 0684e5f | 2009-02-09 02:48:38 +0100 | [diff] [blame] | 654 | __u8 auth_type; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 655 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 656 | auth_type = l2cap_get_auth_type(chan); |
Marcel Holtmann | 0684e5f | 2009-02-09 02:48:38 +0100 | [diff] [blame] | 657 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 658 | return hci_conn_security(conn->hcon, chan->sec_level, auth_type); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 659 | } |
| 660 | |
Johannes Berg | b5ad8b7 | 2011-06-01 08:54:45 +0200 | [diff] [blame] | 661 | static u8 l2cap_get_ident(struct l2cap_conn *conn) |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 662 | { |
| 663 | u8 id; |
| 664 | |
| 665 | /* Get next available identificator. |
| 666 | * 1 - 128 are used by kernel. |
| 667 | * 129 - 199 are reserved. |
| 668 | * 200 - 254 are used by utilities like l2ping, etc. |
| 669 | */ |
| 670 | |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 671 | spin_lock(&conn->lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 672 | |
| 673 | if (++conn->tx_ident > 128) |
| 674 | conn->tx_ident = 1; |
| 675 | |
| 676 | id = conn->tx_ident; |
| 677 | |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 678 | spin_unlock(&conn->lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 679 | |
| 680 | return id; |
| 681 | } |
| 682 | |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 683 | static void l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, void *data) |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 684 | { |
| 685 | struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 686 | u8 flags; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 687 | |
| 688 | BT_DBG("code 0x%2.2x", code); |
| 689 | |
| 690 | if (!skb) |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 691 | return; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 692 | |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 693 | if (lmp_no_flush_capable(conn->hcon->hdev)) |
| 694 | flags = ACL_START_NO_FLUSH; |
| 695 | else |
| 696 | flags = ACL_START; |
| 697 | |
Jaikumar Ganesh | 14b12d0 | 2011-05-23 18:06:04 -0700 | [diff] [blame] | 698 | bt_cb(skb)->force_active = BT_POWER_FORCE_ACTIVE_ON; |
Luiz Augusto von Dentz | 5e59b79 | 2011-11-01 10:58:57 +0200 | [diff] [blame] | 699 | skb->priority = HCI_PRIO_MAX; |
Jaikumar Ganesh | 14b12d0 | 2011-05-23 18:06:04 -0700 | [diff] [blame] | 700 | |
Luiz Augusto von Dentz | 73d80de | 2011-11-02 15:52:01 +0200 | [diff] [blame] | 701 | hci_send_acl(conn->hchan, skb, flags); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 702 | } |
| 703 | |
Luiz Augusto von Dentz | 73d80de | 2011-11-02 15:52:01 +0200 | [diff] [blame] | 704 | static void l2cap_do_send(struct l2cap_chan *chan, struct sk_buff *skb) |
| 705 | { |
| 706 | struct hci_conn *hcon = chan->conn->hcon; |
| 707 | u16 flags; |
| 708 | |
| 709 | BT_DBG("chan %p, skb %p len %d priority %u", chan, skb, skb->len, |
| 710 | skb->priority); |
| 711 | |
| 712 | if (!test_bit(FLAG_FLUSHABLE, &chan->flags) && |
| 713 | lmp_no_flush_capable(hcon->hdev)) |
| 714 | flags = ACL_START_NO_FLUSH; |
| 715 | else |
| 716 | flags = ACL_START; |
| 717 | |
| 718 | bt_cb(skb)->force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags); |
| 719 | hci_send_acl(chan->conn->hchan, skb, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | } |
| 721 | |
Mat Martineau | b5c6aae | 2012-04-25 16:36:15 -0700 | [diff] [blame] | 722 | static void __unpack_enhanced_control(u16 enh, struct l2cap_ctrl *control) |
| 723 | { |
| 724 | control->reqseq = (enh & L2CAP_CTRL_REQSEQ) >> L2CAP_CTRL_REQSEQ_SHIFT; |
| 725 | control->final = (enh & L2CAP_CTRL_FINAL) >> L2CAP_CTRL_FINAL_SHIFT; |
| 726 | |
| 727 | if (enh & L2CAP_CTRL_FRAME_TYPE) { |
| 728 | /* S-Frame */ |
| 729 | control->sframe = 1; |
| 730 | control->poll = (enh & L2CAP_CTRL_POLL) >> L2CAP_CTRL_POLL_SHIFT; |
| 731 | control->super = (enh & L2CAP_CTRL_SUPERVISE) >> L2CAP_CTRL_SUPER_SHIFT; |
| 732 | |
| 733 | control->sar = 0; |
| 734 | control->txseq = 0; |
| 735 | } else { |
| 736 | /* I-Frame */ |
| 737 | control->sframe = 0; |
| 738 | control->sar = (enh & L2CAP_CTRL_SAR) >> L2CAP_CTRL_SAR_SHIFT; |
| 739 | control->txseq = (enh & L2CAP_CTRL_TXSEQ) >> L2CAP_CTRL_TXSEQ_SHIFT; |
| 740 | |
| 741 | control->poll = 0; |
| 742 | control->super = 0; |
| 743 | } |
| 744 | } |
| 745 | |
| 746 | static void __unpack_extended_control(u32 ext, struct l2cap_ctrl *control) |
| 747 | { |
| 748 | control->reqseq = (ext & L2CAP_EXT_CTRL_REQSEQ) >> L2CAP_EXT_CTRL_REQSEQ_SHIFT; |
| 749 | control->final = (ext & L2CAP_EXT_CTRL_FINAL) >> L2CAP_EXT_CTRL_FINAL_SHIFT; |
| 750 | |
| 751 | if (ext & L2CAP_EXT_CTRL_FRAME_TYPE) { |
| 752 | /* S-Frame */ |
| 753 | control->sframe = 1; |
| 754 | control->poll = (ext & L2CAP_EXT_CTRL_POLL) >> L2CAP_EXT_CTRL_POLL_SHIFT; |
| 755 | control->super = (ext & L2CAP_EXT_CTRL_SUPERVISE) >> L2CAP_EXT_CTRL_SUPER_SHIFT; |
| 756 | |
| 757 | control->sar = 0; |
| 758 | control->txseq = 0; |
| 759 | } else { |
| 760 | /* I-Frame */ |
| 761 | control->sframe = 0; |
| 762 | control->sar = (ext & L2CAP_EXT_CTRL_SAR) >> L2CAP_EXT_CTRL_SAR_SHIFT; |
| 763 | control->txseq = (ext & L2CAP_EXT_CTRL_TXSEQ) >> L2CAP_EXT_CTRL_TXSEQ_SHIFT; |
| 764 | |
| 765 | control->poll = 0; |
| 766 | control->super = 0; |
| 767 | } |
| 768 | } |
| 769 | |
| 770 | static inline void __unpack_control(struct l2cap_chan *chan, |
| 771 | struct sk_buff *skb) |
| 772 | { |
| 773 | if (test_bit(FLAG_EXT_CTRL, &chan->flags)) { |
| 774 | __unpack_extended_control(get_unaligned_le32(skb->data), |
| 775 | &bt_cb(skb)->control); |
| 776 | } else { |
| 777 | __unpack_enhanced_control(get_unaligned_le16(skb->data), |
| 778 | &bt_cb(skb)->control); |
| 779 | } |
| 780 | } |
| 781 | |
| 782 | static u32 __pack_extended_control(struct l2cap_ctrl *control) |
| 783 | { |
| 784 | u32 packed; |
| 785 | |
| 786 | packed = control->reqseq << L2CAP_EXT_CTRL_REQSEQ_SHIFT; |
| 787 | packed |= control->final << L2CAP_EXT_CTRL_FINAL_SHIFT; |
| 788 | |
| 789 | if (control->sframe) { |
| 790 | packed |= control->poll << L2CAP_EXT_CTRL_POLL_SHIFT; |
| 791 | packed |= control->super << L2CAP_EXT_CTRL_SUPER_SHIFT; |
| 792 | packed |= L2CAP_EXT_CTRL_FRAME_TYPE; |
| 793 | } else { |
| 794 | packed |= control->sar << L2CAP_EXT_CTRL_SAR_SHIFT; |
| 795 | packed |= control->txseq << L2CAP_EXT_CTRL_TXSEQ_SHIFT; |
| 796 | } |
| 797 | |
| 798 | return packed; |
| 799 | } |
| 800 | |
| 801 | static u16 __pack_enhanced_control(struct l2cap_ctrl *control) |
| 802 | { |
| 803 | u16 packed; |
| 804 | |
| 805 | packed = control->reqseq << L2CAP_CTRL_REQSEQ_SHIFT; |
| 806 | packed |= control->final << L2CAP_CTRL_FINAL_SHIFT; |
| 807 | |
| 808 | if (control->sframe) { |
| 809 | packed |= control->poll << L2CAP_CTRL_POLL_SHIFT; |
| 810 | packed |= control->super << L2CAP_CTRL_SUPER_SHIFT; |
| 811 | packed |= L2CAP_CTRL_FRAME_TYPE; |
| 812 | } else { |
| 813 | packed |= control->sar << L2CAP_CTRL_SAR_SHIFT; |
| 814 | packed |= control->txseq << L2CAP_CTRL_TXSEQ_SHIFT; |
| 815 | } |
| 816 | |
| 817 | return packed; |
| 818 | } |
| 819 | |
| 820 | static inline void __pack_control(struct l2cap_chan *chan, |
| 821 | struct l2cap_ctrl *control, |
| 822 | struct sk_buff *skb) |
| 823 | { |
| 824 | if (test_bit(FLAG_EXT_CTRL, &chan->flags)) { |
| 825 | put_unaligned_le32(__pack_extended_control(control), |
| 826 | skb->data + L2CAP_HDR_SIZE); |
| 827 | } else { |
| 828 | put_unaligned_le16(__pack_enhanced_control(control), |
| 829 | skb->data + L2CAP_HDR_SIZE); |
| 830 | } |
| 831 | } |
| 832 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 833 | static inline void l2cap_send_sframe(struct l2cap_chan *chan, u32 control) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 834 | { |
| 835 | struct sk_buff *skb; |
| 836 | struct l2cap_hdr *lh; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 837 | struct l2cap_conn *conn = chan->conn; |
Andrei Emeltchenko | e4ca6d9 | 2011-10-11 13:37:52 +0300 | [diff] [blame] | 838 | int count, hlen; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 839 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 840 | if (chan->state != BT_CONNECTED) |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 841 | return; |
| 842 | |
Andrei Emeltchenko | e4ca6d9 | 2011-10-11 13:37:52 +0300 | [diff] [blame] | 843 | if (test_bit(FLAG_EXT_CTRL, &chan->flags)) |
| 844 | hlen = L2CAP_EXT_HDR_SIZE; |
| 845 | else |
| 846 | hlen = L2CAP_ENH_HDR_SIZE; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 847 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 848 | if (chan->fcs == L2CAP_FCS_CRC16) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 849 | hlen += L2CAP_FCS_SIZE; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 850 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 851 | BT_DBG("chan %p, control 0x%8.8x", chan, control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 852 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 853 | count = min_t(unsigned int, conn->mtu, hlen); |
Andrei Emeltchenko | 793c2f1 | 2011-10-11 13:37:48 +0300 | [diff] [blame] | 854 | |
| 855 | control |= __set_sframe(chan); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 856 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 857 | if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state)) |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 858 | control |= __set_ctrl_final(chan); |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 859 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 860 | if (test_and_clear_bit(CONN_SEND_PBIT, &chan->conn_state)) |
Andrei Emeltchenko | e378173 | 2011-10-11 13:37:50 +0300 | [diff] [blame] | 861 | control |= __set_ctrl_poll(chan); |
Gustavo F. Padovan | f0946cc | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 862 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 863 | skb = bt_skb_alloc(count, GFP_ATOMIC); |
| 864 | if (!skb) |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 865 | return; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 866 | |
| 867 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 868 | lh->len = cpu_to_le16(hlen - L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 869 | lh->cid = cpu_to_le16(chan->dcid); |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 870 | |
| 871 | __put_control(chan, control, skb_put(skb, __ctrl_size(chan))); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 872 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 873 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 874 | u16 fcs = crc16(0, (u8 *)lh, count - L2CAP_FCS_SIZE); |
| 875 | put_unaligned_le16(fcs, skb_put(skb, L2CAP_FCS_SIZE)); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 876 | } |
| 877 | |
Luiz Augusto von Dentz | 73d80de | 2011-11-02 15:52:01 +0200 | [diff] [blame] | 878 | skb->priority = HCI_PRIO_MAX; |
| 879 | l2cap_do_send(chan, skb); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 880 | } |
| 881 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 882 | static inline void l2cap_send_rr_or_rnr(struct l2cap_chan *chan, u32 control) |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 883 | { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 884 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 885 | control |= __set_ctrl_super(chan, L2CAP_SUPER_RNR); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 886 | set_bit(CONN_RNR_SENT, &chan->conn_state); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 887 | } else |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 888 | control |= __set_ctrl_super(chan, L2CAP_SUPER_RR); |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 889 | |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 890 | control |= __set_reqseq(chan, chan->buffer_seq); |
Gustavo F. Padovan | 2ab25cd | 2009-10-03 02:34:40 -0300 | [diff] [blame] | 891 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 892 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 893 | } |
| 894 | |
Gustavo F. Padovan | b445003 | 2011-04-12 18:15:09 -0300 | [diff] [blame] | 895 | static inline int __l2cap_no_conn_pending(struct l2cap_chan *chan) |
Andrei Emeltchenko | e501d05 | 2010-07-08 12:14:41 +0300 | [diff] [blame] | 896 | { |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 897 | return !test_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Andrei Emeltchenko | e501d05 | 2010-07-08 12:14:41 +0300 | [diff] [blame] | 898 | } |
| 899 | |
Andrei Emeltchenko | 9b27f35 | 2012-02-24 16:00:00 +0200 | [diff] [blame] | 900 | static void l2cap_send_conn_req(struct l2cap_chan *chan) |
| 901 | { |
| 902 | struct l2cap_conn *conn = chan->conn; |
| 903 | struct l2cap_conn_req req; |
| 904 | |
| 905 | req.scid = cpu_to_le16(chan->scid); |
| 906 | req.psm = chan->psm; |
| 907 | |
| 908 | chan->ident = l2cap_get_ident(conn); |
| 909 | |
| 910 | set_bit(CONF_CONNECT_PEND, &chan->conf_state); |
| 911 | |
| 912 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_REQ, sizeof(req), &req); |
| 913 | } |
| 914 | |
Vinicius Costa Gomes | 9f0caeb | 2012-04-20 15:46:08 -0300 | [diff] [blame] | 915 | static void l2cap_chan_ready(struct l2cap_chan *chan) |
| 916 | { |
| 917 | struct sock *sk = chan->sk; |
| 918 | struct sock *parent; |
| 919 | |
| 920 | lock_sock(sk); |
| 921 | |
| 922 | parent = bt_sk(sk)->parent; |
| 923 | |
| 924 | BT_DBG("sk %p, parent %p", sk, parent); |
| 925 | |
| 926 | chan->conf_state = 0; |
| 927 | __clear_chan_timer(chan); |
| 928 | |
| 929 | __l2cap_state_change(chan, BT_CONNECTED); |
| 930 | sk->sk_state_change(sk); |
| 931 | |
| 932 | if (parent) |
| 933 | parent->sk_data_ready(parent, 0); |
| 934 | |
| 935 | release_sock(sk); |
| 936 | } |
| 937 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 938 | static void l2cap_do_start(struct l2cap_chan *chan) |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 939 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 940 | struct l2cap_conn *conn = chan->conn; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 941 | |
Vinicius Costa Gomes | 9f0caeb | 2012-04-20 15:46:08 -0300 | [diff] [blame] | 942 | if (conn->hcon->type == LE_LINK) { |
| 943 | l2cap_chan_ready(chan); |
| 944 | return; |
| 945 | } |
| 946 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 947 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) { |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 948 | if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)) |
| 949 | return; |
| 950 | |
Gustavo F. Padovan | d45fc42 | 2011-11-05 19:54:24 -0200 | [diff] [blame] | 951 | if (l2cap_chan_check_security(chan) && |
Andrei Emeltchenko | 9b27f35 | 2012-02-24 16:00:00 +0200 | [diff] [blame] | 952 | __l2cap_no_conn_pending(chan)) |
| 953 | l2cap_send_conn_req(chan); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 954 | } else { |
| 955 | struct l2cap_info_req req; |
| 956 | req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 957 | |
| 958 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; |
| 959 | conn->info_ident = l2cap_get_ident(conn); |
| 960 | |
Marcel Holtmann | ba13ccd | 2012-03-01 14:25:33 -0800 | [diff] [blame] | 961 | schedule_delayed_work(&conn->info_timer, L2CAP_INFO_TIMEOUT); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 962 | |
| 963 | l2cap_send_cmd(conn, conn->info_ident, |
| 964 | L2CAP_INFO_REQ, sizeof(req), &req); |
| 965 | } |
| 966 | } |
| 967 | |
Gustavo F. Padovan | cf6c2c0 | 2010-06-07 20:54:45 -0300 | [diff] [blame] | 968 | static inline int l2cap_mode_supported(__u8 mode, __u32 feat_mask) |
| 969 | { |
| 970 | u32 local_feat_mask = l2cap_feat_mask; |
Gustavo F. Padovan | d1c4a17 | 2010-07-18 16:25:54 -0300 | [diff] [blame] | 971 | if (!disable_ertm) |
Gustavo F. Padovan | cf6c2c0 | 2010-06-07 20:54:45 -0300 | [diff] [blame] | 972 | local_feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING; |
| 973 | |
| 974 | switch (mode) { |
| 975 | case L2CAP_MODE_ERTM: |
| 976 | return L2CAP_FEAT_ERTM & feat_mask & local_feat_mask; |
| 977 | case L2CAP_MODE_STREAMING: |
| 978 | return L2CAP_FEAT_STREAMING & feat_mask & local_feat_mask; |
| 979 | default: |
| 980 | return 0x00; |
| 981 | } |
| 982 | } |
| 983 | |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 984 | static void l2cap_send_disconn_req(struct l2cap_conn *conn, struct l2cap_chan *chan, int err) |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 985 | { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 986 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 987 | struct l2cap_disconn_req req; |
| 988 | |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 989 | if (!conn) |
| 990 | return; |
| 991 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 992 | if (chan->mode == L2CAP_MODE_ERTM) { |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 993 | __clear_retrans_timer(chan); |
| 994 | __clear_monitor_timer(chan); |
| 995 | __clear_ack_timer(chan); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 996 | } |
| 997 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 998 | req.dcid = cpu_to_le16(chan->dcid); |
| 999 | req.scid = cpu_to_le16(chan->scid); |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 1000 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
| 1001 | L2CAP_DISCONN_REQ, sizeof(req), &req); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 1002 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1003 | lock_sock(sk); |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 1004 | __l2cap_state_change(chan, BT_DISCONN); |
Andrei Emeltchenko | 2e0052e | 2012-02-21 12:54:58 +0200 | [diff] [blame] | 1005 | __l2cap_chan_set_err(chan, err); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1006 | release_sock(sk); |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 1007 | } |
| 1008 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | /* ---- L2CAP connections ---- */ |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1010 | static void l2cap_conn_start(struct l2cap_conn *conn) |
| 1011 | { |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1012 | struct l2cap_chan *chan, *tmp; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1013 | |
| 1014 | BT_DBG("conn %p", conn); |
| 1015 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1016 | mutex_lock(&conn->chan_lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1017 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1018 | list_for_each_entry_safe(chan, tmp, &conn->chan_l, list) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1019 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1020 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1021 | l2cap_chan_lock(chan); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1022 | |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 1023 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1024 | l2cap_chan_unlock(chan); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1025 | continue; |
| 1026 | } |
| 1027 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1028 | if (chan->state == BT_CONNECT) { |
Gustavo F. Padovan | d45fc42 | 2011-11-05 19:54:24 -0200 | [diff] [blame] | 1029 | if (!l2cap_chan_check_security(chan) || |
Gustavo F. Padovan | b445003 | 2011-04-12 18:15:09 -0300 | [diff] [blame] | 1030 | !__l2cap_no_conn_pending(chan)) { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1031 | l2cap_chan_unlock(chan); |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 1032 | continue; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 1033 | } |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 1034 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 1035 | if (!l2cap_mode_supported(chan->mode, conn->feat_mask) |
| 1036 | && test_bit(CONF_STATE2_DEVICE, |
| 1037 | &chan->conf_state)) { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1038 | l2cap_chan_close(chan, ECONNRESET); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1039 | l2cap_chan_unlock(chan); |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 1040 | continue; |
| 1041 | } |
| 1042 | |
Andrei Emeltchenko | 9b27f35 | 2012-02-24 16:00:00 +0200 | [diff] [blame] | 1043 | l2cap_send_conn_req(chan); |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 1044 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1045 | } else if (chan->state == BT_CONNECT2) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1046 | struct l2cap_conn_rsp rsp; |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 1047 | char buf[128]; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1048 | rsp.scid = cpu_to_le16(chan->dcid); |
| 1049 | rsp.dcid = cpu_to_le16(chan->scid); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1050 | |
Gustavo F. Padovan | d45fc42 | 2011-11-05 19:54:24 -0200 | [diff] [blame] | 1051 | if (l2cap_chan_check_security(chan)) { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1052 | lock_sock(sk); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 1053 | if (bt_sk(sk)->defer_setup) { |
| 1054 | struct sock *parent = bt_sk(sk)->parent; |
| 1055 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); |
| 1056 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHOR_PEND); |
Ilia Kolomisnky | 05e9a2f | 2011-07-15 18:30:21 +0000 | [diff] [blame] | 1057 | if (parent) |
| 1058 | parent->sk_data_ready(parent, 0); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 1059 | |
| 1060 | } else { |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 1061 | __l2cap_state_change(chan, BT_CONFIG); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 1062 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); |
| 1063 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 1064 | } |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1065 | release_sock(sk); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1066 | } else { |
| 1067 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); |
| 1068 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHEN_PEND); |
| 1069 | } |
| 1070 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 1071 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, |
| 1072 | sizeof(rsp), &rsp); |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 1073 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 1074 | if (test_bit(CONF_REQ_SENT, &chan->conf_state) || |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 1075 | rsp.result != L2CAP_CR_SUCCESS) { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1076 | l2cap_chan_unlock(chan); |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 1077 | continue; |
| 1078 | } |
| 1079 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 1080 | set_bit(CONF_REQ_SENT, &chan->conf_state); |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 1081 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 1082 | l2cap_build_conf_req(chan, buf), buf); |
| 1083 | chan->num_conf_req++; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1084 | } |
| 1085 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1086 | l2cap_chan_unlock(chan); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1087 | } |
| 1088 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1089 | mutex_unlock(&conn->chan_lock); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1090 | } |
| 1091 | |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1092 | /* Find socket with cid and source/destination bdaddr. |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1093 | * Returns closest match, locked. |
| 1094 | */ |
Andrei Emeltchenko | d9b8870 | 2012-03-12 12:13:08 +0200 | [diff] [blame] | 1095 | static struct l2cap_chan *l2cap_global_chan_by_scid(int state, u16 cid, |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1096 | bdaddr_t *src, |
| 1097 | bdaddr_t *dst) |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1098 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1099 | struct l2cap_chan *c, *c1 = NULL; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1100 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1101 | read_lock(&chan_list_lock); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1102 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1103 | list_for_each_entry(c, &chan_list, global_l) { |
| 1104 | struct sock *sk = c->sk; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1105 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1106 | if (state && c->state != state) |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1107 | continue; |
| 1108 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1109 | if (c->scid == cid) { |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1110 | int src_match, dst_match; |
| 1111 | int src_any, dst_any; |
| 1112 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1113 | /* Exact match. */ |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1114 | src_match = !bacmp(&bt_sk(sk)->src, src); |
| 1115 | dst_match = !bacmp(&bt_sk(sk)->dst, dst); |
| 1116 | if (src_match && dst_match) { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1117 | read_unlock(&chan_list_lock); |
| 1118 | return c; |
| 1119 | } |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1120 | |
| 1121 | /* Closest match */ |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1122 | src_any = !bacmp(&bt_sk(sk)->src, BDADDR_ANY); |
| 1123 | dst_any = !bacmp(&bt_sk(sk)->dst, BDADDR_ANY); |
| 1124 | if ((src_match && dst_any) || (src_any && dst_match) || |
| 1125 | (src_any && dst_any)) |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1126 | c1 = c; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1127 | } |
| 1128 | } |
Gustavo F. Padovan | 280f294 | 2011-04-13 19:01:22 -0300 | [diff] [blame] | 1129 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1130 | read_unlock(&chan_list_lock); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1131 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1132 | return c1; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1133 | } |
| 1134 | |
| 1135 | static void l2cap_le_conn_ready(struct l2cap_conn *conn) |
| 1136 | { |
Gustavo F. Padovan | c916fbe | 2011-04-04 16:00:55 -0300 | [diff] [blame] | 1137 | struct sock *parent, *sk; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1138 | struct l2cap_chan *chan, *pchan; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1139 | |
| 1140 | BT_DBG(""); |
| 1141 | |
| 1142 | /* Check if we have socket listening on cid */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1143 | pchan = l2cap_global_chan_by_scid(BT_LISTEN, L2CAP_CID_LE_DATA, |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1144 | conn->src, conn->dst); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1145 | if (!pchan) |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1146 | return; |
| 1147 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1148 | parent = pchan->sk; |
| 1149 | |
Gustavo F. Padovan | aa2ac88 | 2011-06-24 01:53:01 -0300 | [diff] [blame] | 1150 | lock_sock(parent); |
Gustavo F. Padovan | 62f3a2c | 2011-04-14 18:34:34 -0300 | [diff] [blame] | 1151 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1152 | /* Check for backlog size */ |
| 1153 | if (sk_acceptq_is_full(parent)) { |
| 1154 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
| 1155 | goto clean; |
| 1156 | } |
| 1157 | |
Gustavo F. Padovan | 80808e4 | 2011-05-16 17:24:37 -0300 | [diff] [blame] | 1158 | chan = pchan->ops->new_connection(pchan->data); |
| 1159 | if (!chan) |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1160 | goto clean; |
| 1161 | |
Gustavo F. Padovan | 80808e4 | 2011-05-16 17:24:37 -0300 | [diff] [blame] | 1162 | sk = chan->sk; |
Gustavo F. Padovan | 5d41ce1 | 2011-04-08 15:40:02 -0300 | [diff] [blame] | 1163 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1164 | hci_conn_hold(conn->hcon); |
| 1165 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1166 | bacpy(&bt_sk(sk)->src, conn->src); |
| 1167 | bacpy(&bt_sk(sk)->dst, conn->dst); |
| 1168 | |
Gustavo F. Padovan | d101024 | 2011-03-25 00:39:48 -0300 | [diff] [blame] | 1169 | bt_accept_enqueue(parent, sk); |
| 1170 | |
Gustavo F. Padovan | 3d57dc6 | 2011-12-17 10:56:45 -0200 | [diff] [blame] | 1171 | l2cap_chan_add(conn, chan); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1172 | |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 1173 | __set_chan_timer(chan, sk->sk_sndtimeo); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1174 | |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 1175 | __l2cap_state_change(chan, BT_CONNECTED); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1176 | parent->sk_data_ready(parent, 0); |
| 1177 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1178 | clean: |
Gustavo F. Padovan | aa2ac88 | 2011-06-24 01:53:01 -0300 | [diff] [blame] | 1179 | release_sock(parent); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1180 | } |
| 1181 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1182 | static void l2cap_conn_ready(struct l2cap_conn *conn) |
| 1183 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1184 | struct l2cap_chan *chan; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1185 | |
| 1186 | BT_DBG("conn %p", conn); |
| 1187 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1188 | if (!conn->hcon->out && conn->hcon->type == LE_LINK) |
| 1189 | l2cap_le_conn_ready(conn); |
| 1190 | |
Vinicius Costa Gomes | 160dc6a | 2011-08-19 21:06:55 -0300 | [diff] [blame] | 1191 | if (conn->hcon->out && conn->hcon->type == LE_LINK) |
| 1192 | smp_conn_security(conn, conn->hcon->pending_sec_level); |
| 1193 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1194 | mutex_lock(&conn->chan_lock); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1195 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1196 | list_for_each_entry(chan, &conn->chan_l, list) { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1197 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1198 | l2cap_chan_lock(chan); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1199 | |
Vinicius Costa Gomes | 6312845 | 2011-06-17 22:46:26 -0300 | [diff] [blame] | 1200 | if (conn->hcon->type == LE_LINK) { |
Anderson Briglia | b501d6a | 2011-06-07 18:46:31 -0300 | [diff] [blame] | 1201 | if (smp_conn_security(conn, chan->sec_level)) |
Andrei Emeltchenko | cf4cd00 | 2012-02-06 15:03:59 +0200 | [diff] [blame] | 1202 | l2cap_chan_ready(chan); |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 1203 | |
Vinicius Costa Gomes | 6312845 | 2011-06-17 22:46:26 -0300 | [diff] [blame] | 1204 | } else if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1205 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 1206 | __clear_chan_timer(chan); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1207 | lock_sock(sk); |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 1208 | __l2cap_state_change(chan, BT_CONNECTED); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1209 | sk->sk_state_change(sk); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1210 | release_sock(sk); |
Anderson Briglia | b501d6a | 2011-06-07 18:46:31 -0300 | [diff] [blame] | 1211 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1212 | } else if (chan->state == BT_CONNECT) |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 1213 | l2cap_do_start(chan); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1214 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1215 | l2cap_chan_unlock(chan); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1216 | } |
| 1217 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1218 | mutex_unlock(&conn->chan_lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1219 | } |
| 1220 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1221 | /* Notify sockets that we cannot guaranty reliability anymore */ |
| 1222 | static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) |
| 1223 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1224 | struct l2cap_chan *chan; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1225 | |
| 1226 | BT_DBG("conn %p", conn); |
| 1227 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1228 | mutex_lock(&conn->chan_lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1229 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1230 | list_for_each_entry(chan, &conn->chan_l, list) { |
Andrei Emeltchenko | ecf61bd | 2011-10-11 14:04:32 +0300 | [diff] [blame] | 1231 | if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags)) |
Andrei Emeltchenko | 2e0052e | 2012-02-21 12:54:58 +0200 | [diff] [blame] | 1232 | __l2cap_chan_set_err(chan, err); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1233 | } |
| 1234 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1235 | mutex_unlock(&conn->chan_lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1236 | } |
| 1237 | |
Gustavo F. Padovan | f878fca | 2011-12-15 01:16:14 -0200 | [diff] [blame] | 1238 | static void l2cap_info_timeout(struct work_struct *work) |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1239 | { |
Gustavo F. Padovan | f878fca | 2011-12-15 01:16:14 -0200 | [diff] [blame] | 1240 | struct l2cap_conn *conn = container_of(work, struct l2cap_conn, |
Gustavo F. Padovan | 030013d | 2011-12-20 10:57:28 -0200 | [diff] [blame] | 1241 | info_timer.work); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1242 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 1243 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 1244 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 1245 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1246 | l2cap_conn_start(conn); |
| 1247 | } |
| 1248 | |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1249 | static void l2cap_conn_del(struct hci_conn *hcon, int err) |
| 1250 | { |
| 1251 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 1252 | struct l2cap_chan *chan, *l; |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1253 | |
| 1254 | if (!conn) |
| 1255 | return; |
| 1256 | |
| 1257 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); |
| 1258 | |
| 1259 | kfree_skb(conn->rx_skb); |
| 1260 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1261 | mutex_lock(&conn->chan_lock); |
| 1262 | |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1263 | /* Kill channels */ |
| 1264 | list_for_each_entry_safe(chan, l, &conn->chan_l, list) { |
Mat Martineau | 61d6ef3 | 2012-04-27 16:50:50 -0700 | [diff] [blame] | 1265 | l2cap_chan_hold(chan); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1266 | l2cap_chan_lock(chan); |
| 1267 | |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1268 | l2cap_chan_del(chan, err); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1269 | |
| 1270 | l2cap_chan_unlock(chan); |
| 1271 | |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1272 | chan->ops->close(chan->data); |
Mat Martineau | 61d6ef3 | 2012-04-27 16:50:50 -0700 | [diff] [blame] | 1273 | l2cap_chan_put(chan); |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1274 | } |
| 1275 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1276 | mutex_unlock(&conn->chan_lock); |
| 1277 | |
Luiz Augusto von Dentz | 73d80de | 2011-11-02 15:52:01 +0200 | [diff] [blame] | 1278 | hci_chan_del(conn->hchan); |
| 1279 | |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1280 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) |
Ulisses Furquim | 127074b | 2012-01-30 18:26:29 -0200 | [diff] [blame] | 1281 | cancel_delayed_work_sync(&conn->info_timer); |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1282 | |
Johan Hedberg | 51a8efd | 2012-01-16 06:10:31 +0200 | [diff] [blame] | 1283 | if (test_and_clear_bit(HCI_CONN_LE_SMP_PEND, &hcon->flags)) { |
Ulisses Furquim | 127074b | 2012-01-30 18:26:29 -0200 | [diff] [blame] | 1284 | cancel_delayed_work_sync(&conn->security_timer); |
Vinicius Costa Gomes | 8aab475 | 2011-09-05 14:31:31 -0300 | [diff] [blame] | 1285 | smp_chan_destroy(conn); |
Vinicius Costa Gomes | d26a234 | 2011-08-19 21:06:51 -0300 | [diff] [blame] | 1286 | } |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1287 | |
| 1288 | hcon->l2cap_data = NULL; |
| 1289 | kfree(conn); |
| 1290 | } |
| 1291 | |
Gustavo F. Padovan | 6c9d42a | 2011-12-20 10:57:27 -0200 | [diff] [blame] | 1292 | static void security_timeout(struct work_struct *work) |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1293 | { |
Gustavo F. Padovan | 6c9d42a | 2011-12-20 10:57:27 -0200 | [diff] [blame] | 1294 | struct l2cap_conn *conn = container_of(work, struct l2cap_conn, |
| 1295 | security_timer.work); |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1296 | |
| 1297 | l2cap_conn_del(conn->hcon, ETIMEDOUT); |
| 1298 | } |
| 1299 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1300 | static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) |
| 1301 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 1302 | struct l2cap_conn *conn = hcon->l2cap_data; |
Luiz Augusto von Dentz | 73d80de | 2011-11-02 15:52:01 +0200 | [diff] [blame] | 1303 | struct hci_chan *hchan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 1305 | if (conn || status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1306 | return conn; |
| 1307 | |
Luiz Augusto von Dentz | 73d80de | 2011-11-02 15:52:01 +0200 | [diff] [blame] | 1308 | hchan = hci_chan_create(hcon); |
| 1309 | if (!hchan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1311 | |
Luiz Augusto von Dentz | 73d80de | 2011-11-02 15:52:01 +0200 | [diff] [blame] | 1312 | conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC); |
| 1313 | if (!conn) { |
| 1314 | hci_chan_del(hchan); |
| 1315 | return NULL; |
| 1316 | } |
| 1317 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1318 | hcon->l2cap_data = conn; |
| 1319 | conn->hcon = hcon; |
Luiz Augusto von Dentz | 73d80de | 2011-11-02 15:52:01 +0200 | [diff] [blame] | 1320 | conn->hchan = hchan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1321 | |
Luiz Augusto von Dentz | 73d80de | 2011-11-02 15:52:01 +0200 | [diff] [blame] | 1322 | BT_DBG("hcon %p conn %p hchan %p", hcon, conn, hchan); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 1323 | |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 1324 | if (hcon->hdev->le_mtu && hcon->type == LE_LINK) |
| 1325 | conn->mtu = hcon->hdev->le_mtu; |
| 1326 | else |
| 1327 | conn->mtu = hcon->hdev->acl_mtu; |
| 1328 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | conn->src = &hcon->hdev->bdaddr; |
| 1330 | conn->dst = &hcon->dst; |
| 1331 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1332 | conn->feat_mask = 0; |
| 1333 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1334 | spin_lock_init(&conn->lock); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1335 | mutex_init(&conn->chan_lock); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1336 | |
| 1337 | INIT_LIST_HEAD(&conn->chan_l); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1339 | if (hcon->type == LE_LINK) |
Gustavo F. Padovan | 6c9d42a | 2011-12-20 10:57:27 -0200 | [diff] [blame] | 1340 | INIT_DELAYED_WORK(&conn->security_timer, security_timeout); |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1341 | else |
Gustavo F. Padovan | 030013d | 2011-12-20 10:57:28 -0200 | [diff] [blame] | 1342 | INIT_DELAYED_WORK(&conn->info_timer, l2cap_info_timeout); |
Dave Young | 45054dc | 2009-10-18 20:28:30 +0000 | [diff] [blame] | 1343 | |
Andrei Emeltchenko | 9f5a0d7 | 2011-11-07 14:20:25 +0200 | [diff] [blame] | 1344 | conn->disc_reason = HCI_ERROR_REMOTE_USER_TERM; |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 1345 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1346 | return conn; |
| 1347 | } |
| 1348 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1349 | /* ---- Socket interface ---- */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1350 | |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1351 | /* Find socket with psm and source / destination bdaddr. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1352 | * Returns closest match. |
| 1353 | */ |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1354 | static struct l2cap_chan *l2cap_global_chan_by_psm(int state, __le16 psm, |
| 1355 | bdaddr_t *src, |
| 1356 | bdaddr_t *dst) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1357 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1358 | struct l2cap_chan *c, *c1 = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1360 | read_lock(&chan_list_lock); |
Gustavo F. Padovan | e0f0cb5 | 2010-11-01 18:43:53 +0000 | [diff] [blame] | 1361 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1362 | list_for_each_entry(c, &chan_list, global_l) { |
| 1363 | struct sock *sk = c->sk; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1364 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1365 | if (state && c->state != state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1366 | continue; |
| 1367 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1368 | if (c->psm == psm) { |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1369 | int src_match, dst_match; |
| 1370 | int src_any, dst_any; |
| 1371 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1372 | /* Exact match. */ |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1373 | src_match = !bacmp(&bt_sk(sk)->src, src); |
| 1374 | dst_match = !bacmp(&bt_sk(sk)->dst, dst); |
| 1375 | if (src_match && dst_match) { |
Johannes Berg | a7567b2 | 2011-06-01 08:29:54 +0200 | [diff] [blame] | 1376 | read_unlock(&chan_list_lock); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1377 | return c; |
| 1378 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | |
| 1380 | /* Closest match */ |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1381 | src_any = !bacmp(&bt_sk(sk)->src, BDADDR_ANY); |
| 1382 | dst_any = !bacmp(&bt_sk(sk)->dst, BDADDR_ANY); |
| 1383 | if ((src_match && dst_any) || (src_any && dst_match) || |
| 1384 | (src_any && dst_any)) |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1385 | c1 = c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1386 | } |
| 1387 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1388 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1389 | read_unlock(&chan_list_lock); |
Gustavo F. Padovan | e0f0cb5 | 2010-11-01 18:43:53 +0000 | [diff] [blame] | 1390 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1391 | return c1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1392 | } |
| 1393 | |
Andre Guedes | 8e9f989 | 2012-04-24 21:02:55 -0300 | [diff] [blame] | 1394 | int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid, |
| 1395 | bdaddr_t *dst, u8 dst_type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1396 | { |
Gustavo F. Padovan | 5d41ce1 | 2011-04-08 15:40:02 -0300 | [diff] [blame] | 1397 | struct sock *sk = chan->sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1398 | bdaddr_t *src = &bt_sk(sk)->src; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1399 | struct l2cap_conn *conn; |
| 1400 | struct hci_conn *hcon; |
| 1401 | struct hci_dev *hdev; |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 1402 | __u8 auth_type; |
Marcel Holtmann | 44d0e48 | 2009-04-20 07:09:16 +0200 | [diff] [blame] | 1403 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1404 | |
Andre Guedes | 8e9f989 | 2012-04-24 21:02:55 -0300 | [diff] [blame] | 1405 | BT_DBG("%s -> %s (type %u) psm 0x%2.2x", batostr(src), batostr(dst), |
| 1406 | dst_type, __le16_to_cpu(chan->psm)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1407 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 1408 | hdev = hci_get_route(dst, src); |
| 1409 | if (!hdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1410 | return -EHOSTUNREACH; |
| 1411 | |
Gustavo F. Padovan | 09fd0de | 2011-06-17 13:03:21 -0300 | [diff] [blame] | 1412 | hci_dev_lock(hdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1413 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1414 | l2cap_chan_lock(chan); |
Gustavo F. Padovan | 03a0019 | 2011-12-09 04:48:17 -0200 | [diff] [blame] | 1415 | |
| 1416 | /* PSM must be odd and lsb of upper byte must be 0 */ |
| 1417 | if ((__le16_to_cpu(psm) & 0x0101) != 0x0001 && !cid && |
| 1418 | chan->chan_type != L2CAP_CHAN_RAW) { |
| 1419 | err = -EINVAL; |
| 1420 | goto done; |
| 1421 | } |
| 1422 | |
| 1423 | if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && !(psm || cid)) { |
| 1424 | err = -EINVAL; |
| 1425 | goto done; |
| 1426 | } |
| 1427 | |
| 1428 | switch (chan->mode) { |
| 1429 | case L2CAP_MODE_BASIC: |
| 1430 | break; |
| 1431 | case L2CAP_MODE_ERTM: |
| 1432 | case L2CAP_MODE_STREAMING: |
| 1433 | if (!disable_ertm) |
| 1434 | break; |
| 1435 | /* fall through */ |
| 1436 | default: |
| 1437 | err = -ENOTSUPP; |
| 1438 | goto done; |
| 1439 | } |
| 1440 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1441 | lock_sock(sk); |
| 1442 | |
Gustavo F. Padovan | 03a0019 | 2011-12-09 04:48:17 -0200 | [diff] [blame] | 1443 | switch (sk->sk_state) { |
| 1444 | case BT_CONNECT: |
| 1445 | case BT_CONNECT2: |
| 1446 | case BT_CONFIG: |
| 1447 | /* Already connecting */ |
| 1448 | err = 0; |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1449 | release_sock(sk); |
Gustavo F. Padovan | 03a0019 | 2011-12-09 04:48:17 -0200 | [diff] [blame] | 1450 | goto done; |
| 1451 | |
| 1452 | case BT_CONNECTED: |
| 1453 | /* Already connected */ |
| 1454 | err = -EISCONN; |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1455 | release_sock(sk); |
Gustavo F. Padovan | 03a0019 | 2011-12-09 04:48:17 -0200 | [diff] [blame] | 1456 | goto done; |
| 1457 | |
| 1458 | case BT_OPEN: |
| 1459 | case BT_BOUND: |
| 1460 | /* Can connect */ |
| 1461 | break; |
| 1462 | |
| 1463 | default: |
| 1464 | err = -EBADFD; |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1465 | release_sock(sk); |
Gustavo F. Padovan | 03a0019 | 2011-12-09 04:48:17 -0200 | [diff] [blame] | 1466 | goto done; |
| 1467 | } |
| 1468 | |
| 1469 | /* Set destination address and psm */ |
Gustavo F. Padovan | 9219b2a | 2012-01-02 20:08:04 -0200 | [diff] [blame] | 1470 | bacpy(&bt_sk(sk)->dst, dst); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1471 | |
| 1472 | release_sock(sk); |
| 1473 | |
Gustavo F. Padovan | 03a0019 | 2011-12-09 04:48:17 -0200 | [diff] [blame] | 1474 | chan->psm = psm; |
| 1475 | chan->dcid = cid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1476 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1477 | auth_type = l2cap_get_auth_type(chan); |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 1478 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1479 | if (chan->dcid == L2CAP_CID_LE_DATA) |
Andre Guedes | 8e9f989 | 2012-04-24 21:02:55 -0300 | [diff] [blame] | 1480 | hcon = hci_connect(hdev, LE_LINK, dst, dst_type, |
Andre Guedes | b12f62c | 2012-04-24 21:02:54 -0300 | [diff] [blame] | 1481 | chan->sec_level, auth_type); |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 1482 | else |
Andre Guedes | 8e9f989 | 2012-04-24 21:02:55 -0300 | [diff] [blame] | 1483 | hcon = hci_connect(hdev, ACL_LINK, dst, dst_type, |
Andre Guedes | b12f62c | 2012-04-24 21:02:54 -0300 | [diff] [blame] | 1484 | chan->sec_level, auth_type); |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 1485 | |
Ville Tervo | 30e7627 | 2011-02-22 16:10:53 -0300 | [diff] [blame] | 1486 | if (IS_ERR(hcon)) { |
| 1487 | err = PTR_ERR(hcon); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1488 | goto done; |
Ville Tervo | 30e7627 | 2011-02-22 16:10:53 -0300 | [diff] [blame] | 1489 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1490 | |
| 1491 | conn = l2cap_conn_add(hcon, 0); |
| 1492 | if (!conn) { |
| 1493 | hci_conn_put(hcon); |
Ville Tervo | 30e7627 | 2011-02-22 16:10:53 -0300 | [diff] [blame] | 1494 | err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1495 | goto done; |
| 1496 | } |
| 1497 | |
Vinicius Costa Gomes | 9f0caeb | 2012-04-20 15:46:08 -0300 | [diff] [blame] | 1498 | if (hcon->type == LE_LINK) { |
| 1499 | err = 0; |
| 1500 | |
| 1501 | if (!list_empty(&conn->chan_l)) { |
| 1502 | err = -EBUSY; |
| 1503 | hci_conn_put(hcon); |
| 1504 | } |
| 1505 | |
| 1506 | if (err) |
| 1507 | goto done; |
| 1508 | } |
| 1509 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1510 | /* Update source addr of the socket */ |
| 1511 | bacpy(src, conn->src); |
| 1512 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1513 | l2cap_chan_unlock(chan); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1514 | l2cap_chan_add(conn, chan); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1515 | l2cap_chan_lock(chan); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1516 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1517 | l2cap_state_change(chan, BT_CONNECT); |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 1518 | __set_chan_timer(chan, sk->sk_sndtimeo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1519 | |
| 1520 | if (hcon->state == BT_CONNECTED) { |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 1521 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 1522 | __clear_chan_timer(chan); |
Gustavo F. Padovan | d45fc42 | 2011-11-05 19:54:24 -0200 | [diff] [blame] | 1523 | if (l2cap_chan_check_security(chan)) |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1524 | l2cap_state_change(chan, BT_CONNECTED); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1525 | } else |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 1526 | l2cap_do_start(chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1527 | } |
| 1528 | |
Ville Tervo | 30e7627 | 2011-02-22 16:10:53 -0300 | [diff] [blame] | 1529 | err = 0; |
| 1530 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1531 | done: |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1532 | l2cap_chan_unlock(chan); |
Gustavo F. Padovan | 09fd0de | 2011-06-17 13:03:21 -0300 | [diff] [blame] | 1533 | hci_dev_unlock(hdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1534 | hci_dev_put(hdev); |
| 1535 | return err; |
| 1536 | } |
| 1537 | |
Gustavo F. Padovan | dcba0db | 2011-02-04 03:08:36 -0200 | [diff] [blame] | 1538 | int __l2cap_wait_ack(struct sock *sk) |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1539 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1540 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1541 | DECLARE_WAITQUEUE(wait, current); |
| 1542 | int err = 0; |
| 1543 | int timeo = HZ/5; |
| 1544 | |
Marcel Holtmann | 2b0b05d | 2010-05-10 11:33:10 +0200 | [diff] [blame] | 1545 | add_wait_queue(sk_sleep(sk), &wait); |
Peter Hurley | a71a0cf | 2011-07-25 18:36:26 -0400 | [diff] [blame] | 1546 | set_current_state(TASK_INTERRUPTIBLE); |
| 1547 | while (chan->unacked_frames > 0 && chan->conn) { |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1548 | if (!timeo) |
| 1549 | timeo = HZ/5; |
| 1550 | |
| 1551 | if (signal_pending(current)) { |
| 1552 | err = sock_intr_errno(timeo); |
| 1553 | break; |
| 1554 | } |
| 1555 | |
| 1556 | release_sock(sk); |
| 1557 | timeo = schedule_timeout(timeo); |
| 1558 | lock_sock(sk); |
Peter Hurley | a71a0cf | 2011-07-25 18:36:26 -0400 | [diff] [blame] | 1559 | set_current_state(TASK_INTERRUPTIBLE); |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1560 | |
| 1561 | err = sock_error(sk); |
| 1562 | if (err) |
| 1563 | break; |
| 1564 | } |
| 1565 | set_current_state(TASK_RUNNING); |
Marcel Holtmann | 2b0b05d | 2010-05-10 11:33:10 +0200 | [diff] [blame] | 1566 | remove_wait_queue(sk_sleep(sk), &wait); |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1567 | return err; |
| 1568 | } |
| 1569 | |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 1570 | static void l2cap_monitor_timeout(struct work_struct *work) |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1571 | { |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 1572 | struct l2cap_chan *chan = container_of(work, struct l2cap_chan, |
| 1573 | monitor_timer.work); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1574 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1575 | BT_DBG("chan %p", chan); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 1576 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1577 | l2cap_chan_lock(chan); |
| 1578 | |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1579 | if (chan->retry_count >= chan->remote_max_tx) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1580 | l2cap_send_disconn_req(chan->conn, chan, ECONNABORTED); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1581 | l2cap_chan_unlock(chan); |
Andrei Emeltchenko | 8d7e1c7 | 2012-03-23 09:42:15 +0200 | [diff] [blame] | 1582 | l2cap_chan_put(chan); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1583 | return; |
| 1584 | } |
| 1585 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1586 | chan->retry_count++; |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 1587 | __set_monitor_timer(chan); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1588 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1589 | l2cap_send_rr_or_rnr(chan, L2CAP_CTRL_POLL); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1590 | l2cap_chan_unlock(chan); |
Andrei Emeltchenko | 8d7e1c7 | 2012-03-23 09:42:15 +0200 | [diff] [blame] | 1591 | l2cap_chan_put(chan); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1592 | } |
| 1593 | |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 1594 | static void l2cap_retrans_timeout(struct work_struct *work) |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1595 | { |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 1596 | struct l2cap_chan *chan = container_of(work, struct l2cap_chan, |
| 1597 | retrans_timer.work); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1598 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 1599 | BT_DBG("chan %p", chan); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 1600 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1601 | l2cap_chan_lock(chan); |
| 1602 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1603 | chan->retry_count = 1; |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 1604 | __set_monitor_timer(chan); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1605 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1606 | set_bit(CONN_WAIT_F, &chan->conn_state); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1607 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1608 | l2cap_send_rr_or_rnr(chan, L2CAP_CTRL_POLL); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1609 | |
| 1610 | l2cap_chan_unlock(chan); |
Andrei Emeltchenko | 8d7e1c7 | 2012-03-23 09:42:15 +0200 | [diff] [blame] | 1611 | l2cap_chan_put(chan); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1612 | } |
| 1613 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1614 | static void l2cap_drop_acked_frames(struct l2cap_chan *chan) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1615 | { |
| 1616 | struct sk_buff *skb; |
| 1617 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1618 | while ((skb = skb_peek(&chan->tx_q)) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1619 | chan->unacked_frames) { |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 1620 | if (bt_cb(skb)->control.txseq == chan->expected_ack_seq) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1621 | break; |
| 1622 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1623 | skb = skb_dequeue(&chan->tx_q); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1624 | kfree_skb(skb); |
| 1625 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1626 | chan->unacked_frames--; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1627 | } |
| 1628 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1629 | if (!chan->unacked_frames) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 1630 | __clear_retrans_timer(chan); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1631 | } |
| 1632 | |
Szymon Janc | 67c9e84 | 2011-07-28 16:24:33 +0200 | [diff] [blame] | 1633 | static void l2cap_streaming_send(struct l2cap_chan *chan) |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1634 | { |
Gustavo F. Padovan | ccbb84a | 2010-08-30 18:44:44 -0300 | [diff] [blame] | 1635 | struct sk_buff *skb; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1636 | u32 control; |
| 1637 | u16 fcs; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1638 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1639 | while ((skb = skb_dequeue(&chan->tx_q))) { |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1640 | control = __get_control(chan, skb->data + L2CAP_HDR_SIZE); |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 1641 | control |= __set_txseq(chan, chan->next_tx_seq); |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 1642 | control |= __set_ctrl_sar(chan, bt_cb(skb)->control.sar); |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1643 | __put_control(chan, control, skb->data + L2CAP_HDR_SIZE); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1644 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1645 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 1646 | fcs = crc16(0, (u8 *)skb->data, |
| 1647 | skb->len - L2CAP_FCS_SIZE); |
| 1648 | put_unaligned_le16(fcs, |
| 1649 | skb->data + skb->len - L2CAP_FCS_SIZE); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1650 | } |
| 1651 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1652 | l2cap_do_send(chan, skb); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1653 | |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 1654 | chan->next_tx_seq = __next_seq(chan, chan->next_tx_seq); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1655 | } |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1656 | } |
| 1657 | |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 1658 | static void l2cap_retransmit_one_frame(struct l2cap_chan *chan, u16 tx_seq) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1659 | { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1660 | struct sk_buff *skb, *tx_skb; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1661 | u16 fcs; |
| 1662 | u32 control; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1663 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1664 | skb = skb_peek(&chan->tx_q); |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1665 | if (!skb) |
| 1666 | return; |
| 1667 | |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 1668 | while (bt_cb(skb)->control.txseq != tx_seq) { |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1669 | if (skb_queue_is_last(&chan->tx_q, skb)) |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1670 | return; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1671 | |
Szymon Janc | d1726b6 | 2011-11-16 09:32:20 +0100 | [diff] [blame] | 1672 | skb = skb_queue_next(&chan->tx_q, skb); |
| 1673 | } |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1674 | |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 1675 | if (bt_cb(skb)->control.retries == chan->remote_max_tx && |
| 1676 | chan->remote_max_tx) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1677 | l2cap_send_disconn_req(chan->conn, chan, ECONNABORTED); |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1678 | return; |
| 1679 | } |
| 1680 | |
| 1681 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 1682 | bt_cb(skb)->control.retries++; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1683 | |
| 1684 | control = __get_control(chan, tx_skb->data + L2CAP_HDR_SIZE); |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 1685 | control &= __get_sar_mask(chan); |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 1686 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1687 | if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state)) |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 1688 | control |= __set_ctrl_final(chan); |
Gustavo F. Padovan | 95ffa97 | 2010-06-18 20:37:33 -0300 | [diff] [blame] | 1689 | |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 1690 | control |= __set_reqseq(chan, chan->buffer_seq); |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 1691 | control |= __set_txseq(chan, tx_seq); |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 1692 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1693 | __put_control(chan, control, tx_skb->data + L2CAP_HDR_SIZE); |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1694 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1695 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 1696 | fcs = crc16(0, (u8 *)tx_skb->data, |
| 1697 | tx_skb->len - L2CAP_FCS_SIZE); |
| 1698 | put_unaligned_le16(fcs, |
| 1699 | tx_skb->data + tx_skb->len - L2CAP_FCS_SIZE); |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1700 | } |
| 1701 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1702 | l2cap_do_send(chan, tx_skb); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1703 | } |
| 1704 | |
Szymon Janc | 67c9e84 | 2011-07-28 16:24:33 +0200 | [diff] [blame] | 1705 | static int l2cap_ertm_send(struct l2cap_chan *chan) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1706 | { |
| 1707 | struct sk_buff *skb, *tx_skb; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1708 | u16 fcs; |
| 1709 | u32 control; |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1710 | int nsent = 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1711 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1712 | if (chan->state != BT_CONNECTED) |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 1713 | return -ENOTCONN; |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1714 | |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 1715 | if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state)) |
| 1716 | return 0; |
| 1717 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1718 | while ((skb = chan->tx_send_head) && (!l2cap_tx_window_full(chan))) { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1719 | |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 1720 | if (bt_cb(skb)->control.retries == chan->remote_max_tx && |
| 1721 | chan->remote_max_tx) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1722 | l2cap_send_disconn_req(chan->conn, chan, ECONNABORTED); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1723 | break; |
| 1724 | } |
| 1725 | |
Andrei Emeltchenko | e420aba | 2009-12-23 13:07:14 +0200 | [diff] [blame] | 1726 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
| 1727 | |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 1728 | bt_cb(skb)->control.retries++; |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1729 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1730 | control = __get_control(chan, tx_skb->data + L2CAP_HDR_SIZE); |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 1731 | control &= __get_sar_mask(chan); |
Gustavo F. Padovan | 95ffa97 | 2010-06-18 20:37:33 -0300 | [diff] [blame] | 1732 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1733 | if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state)) |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 1734 | control |= __set_ctrl_final(chan); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1735 | |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 1736 | control |= __set_reqseq(chan, chan->buffer_seq); |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 1737 | control |= __set_txseq(chan, chan->next_tx_seq); |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 1738 | control |= __set_ctrl_sar(chan, bt_cb(skb)->control.sar); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1739 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1740 | __put_control(chan, control, tx_skb->data + L2CAP_HDR_SIZE); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1741 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1742 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 1743 | fcs = crc16(0, (u8 *)skb->data, |
| 1744 | tx_skb->len - L2CAP_FCS_SIZE); |
| 1745 | put_unaligned_le16(fcs, skb->data + |
| 1746 | tx_skb->len - L2CAP_FCS_SIZE); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1747 | } |
| 1748 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1749 | l2cap_do_send(chan, tx_skb); |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1750 | |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 1751 | __set_retrans_timer(chan); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1752 | |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 1753 | bt_cb(skb)->control.txseq = chan->next_tx_seq; |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 1754 | |
| 1755 | chan->next_tx_seq = __next_seq(chan, chan->next_tx_seq); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1756 | |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 1757 | if (bt_cb(skb)->control.retries == 1) { |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1758 | chan->unacked_frames++; |
Szymon Janc | 930fa4a | 2012-02-07 15:43:02 +0100 | [diff] [blame] | 1759 | |
| 1760 | if (!nsent++) |
| 1761 | __clear_ack_timer(chan); |
Szymon Janc | 8ed7a0a | 2012-02-07 15:43:01 +0100 | [diff] [blame] | 1762 | } |
Suraj Sumangala | 23e9fde | 2011-03-09 14:44:05 +0530 | [diff] [blame] | 1763 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1764 | chan->frames_sent++; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1765 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1766 | if (skb_queue_is_last(&chan->tx_q, skb)) |
| 1767 | chan->tx_send_head = NULL; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1768 | else |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1769 | chan->tx_send_head = skb_queue_next(&chan->tx_q, skb); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1770 | } |
| 1771 | |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1772 | return nsent; |
| 1773 | } |
| 1774 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1775 | static int l2cap_retransmit_frames(struct l2cap_chan *chan) |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1776 | { |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1777 | int ret; |
| 1778 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1779 | if (!skb_queue_empty(&chan->tx_q)) |
| 1780 | chan->tx_send_head = chan->tx_q.next; |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1781 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1782 | chan->next_tx_seq = chan->expected_ack_seq; |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1783 | ret = l2cap_ertm_send(chan); |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1784 | return ret; |
| 1785 | } |
| 1786 | |
Szymon Janc | b17e73b | 2012-01-11 10:59:47 +0100 | [diff] [blame] | 1787 | static void __l2cap_send_ack(struct l2cap_chan *chan) |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1788 | { |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1789 | u32 control = 0; |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1790 | |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 1791 | control |= __set_reqseq(chan, chan->buffer_seq); |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1792 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1793 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 1794 | control |= __set_ctrl_super(chan, L2CAP_SUPER_RNR); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1795 | set_bit(CONN_RNR_SENT, &chan->conn_state); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1796 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1797 | return; |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1798 | } |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1799 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1800 | if (l2cap_ertm_send(chan) > 0) |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1801 | return; |
| 1802 | |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 1803 | control |= __set_ctrl_super(chan, L2CAP_SUPER_RR); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1804 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1805 | } |
| 1806 | |
Szymon Janc | b17e73b | 2012-01-11 10:59:47 +0100 | [diff] [blame] | 1807 | static void l2cap_send_ack(struct l2cap_chan *chan) |
| 1808 | { |
| 1809 | __clear_ack_timer(chan); |
| 1810 | __l2cap_send_ack(chan); |
| 1811 | } |
| 1812 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1813 | static void l2cap_send_srejtail(struct l2cap_chan *chan) |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 1814 | { |
| 1815 | struct srej_list *tail; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1816 | u32 control; |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 1817 | |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 1818 | control = __set_ctrl_super(chan, L2CAP_SUPER_SREJ); |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 1819 | control |= __set_ctrl_final(chan); |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 1820 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 1821 | tail = list_entry((&chan->srej_l)->prev, struct srej_list, list); |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 1822 | control |= __set_reqseq(chan, tail->tx_seq); |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 1823 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1824 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 1825 | } |
| 1826 | |
Gustavo F. Padovan | 0412468 | 2012-03-08 01:25:00 -0300 | [diff] [blame] | 1827 | static inline int l2cap_skbuff_fromiovec(struct l2cap_chan *chan, |
| 1828 | struct msghdr *msg, int len, |
| 1829 | int count, struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1830 | { |
Andrei Emeltchenko | 0952a57 | 2012-01-13 17:21:43 +0200 | [diff] [blame] | 1831 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1832 | struct sk_buff **frag; |
Gustavo Padovan | 9033894 | 2012-04-06 20:15:47 -0300 | [diff] [blame] | 1833 | int sent = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1834 | |
Gustavo F. Padovan | 59203a2 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1835 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1836 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1837 | |
| 1838 | sent += count; |
| 1839 | len -= count; |
| 1840 | |
| 1841 | /* Continuation fragments (no L2CAP header) */ |
| 1842 | frag = &skb_shinfo(skb)->frag_list; |
| 1843 | while (len) { |
Gustavo Padovan | fbe0070 | 2012-05-15 13:22:55 -0300 | [diff] [blame] | 1844 | struct sk_buff *tmp; |
| 1845 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1846 | count = min_t(unsigned int, conn->mtu, len); |
| 1847 | |
Gustavo Padovan | fbe0070 | 2012-05-15 13:22:55 -0300 | [diff] [blame] | 1848 | tmp = chan->ops->alloc_skb(chan, count, |
| 1849 | msg->msg_flags & MSG_DONTWAIT); |
| 1850 | if (IS_ERR(tmp)) |
| 1851 | return PTR_ERR(tmp); |
Andrei Emeltchenko | 2f7719c | 2012-01-20 14:08:03 +0200 | [diff] [blame] | 1852 | |
Gustavo Padovan | fbe0070 | 2012-05-15 13:22:55 -0300 | [diff] [blame] | 1853 | *frag = tmp; |
| 1854 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1855 | if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) |
| 1856 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1857 | |
Luiz Augusto von Dentz | 5e59b79 | 2011-11-01 10:58:57 +0200 | [diff] [blame] | 1858 | (*frag)->priority = skb->priority; |
| 1859 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1860 | sent += count; |
| 1861 | len -= count; |
| 1862 | |
Gustavo Padovan | 2d0ed3d | 2012-05-11 13:16:12 -0300 | [diff] [blame] | 1863 | skb->len += (*frag)->len; |
| 1864 | skb->data_len += (*frag)->len; |
| 1865 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | frag = &(*frag)->next; |
| 1867 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1868 | |
| 1869 | return sent; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1870 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1871 | |
Luiz Augusto von Dentz | 5e59b79 | 2011-11-01 10:58:57 +0200 | [diff] [blame] | 1872 | static struct sk_buff *l2cap_create_connless_pdu(struct l2cap_chan *chan, |
| 1873 | struct msghdr *msg, size_t len, |
| 1874 | u32 priority) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1875 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1876 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1877 | struct sk_buff *skb; |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 1878 | int err, count, hlen = L2CAP_HDR_SIZE + L2CAP_PSMLEN_SIZE; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1879 | struct l2cap_hdr *lh; |
| 1880 | |
Andrei Emeltchenko | 6d5922b | 2012-02-06 15:04:01 +0200 | [diff] [blame] | 1881 | BT_DBG("chan %p len %d priority %u", chan, (int)len, priority); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1882 | |
| 1883 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
Andrei Emeltchenko | 2f7719c | 2012-01-20 14:08:03 +0200 | [diff] [blame] | 1884 | |
| 1885 | skb = chan->ops->alloc_skb(chan, count + hlen, |
Gustavo Padovan | 9033894 | 2012-04-06 20:15:47 -0300 | [diff] [blame] | 1886 | msg->msg_flags & MSG_DONTWAIT); |
| 1887 | if (IS_ERR(skb)) |
| 1888 | return skb; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1889 | |
Luiz Augusto von Dentz | 5e59b79 | 2011-11-01 10:58:57 +0200 | [diff] [blame] | 1890 | skb->priority = priority; |
| 1891 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1892 | /* Create L2CAP header */ |
| 1893 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1894 | lh->cid = cpu_to_le16(chan->dcid); |
Andrei Emeltchenko | daf6a78c | 2012-05-03 10:55:52 +0300 | [diff] [blame] | 1895 | lh->len = cpu_to_le16(len + L2CAP_PSMLEN_SIZE); |
| 1896 | put_unaligned(chan->psm, skb_put(skb, L2CAP_PSMLEN_SIZE)); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1897 | |
Andrei Emeltchenko | 0952a57 | 2012-01-13 17:21:43 +0200 | [diff] [blame] | 1898 | err = l2cap_skbuff_fromiovec(chan, msg, len, count, skb); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1899 | if (unlikely(err < 0)) { |
| 1900 | kfree_skb(skb); |
| 1901 | return ERR_PTR(err); |
| 1902 | } |
| 1903 | return skb; |
| 1904 | } |
| 1905 | |
Luiz Augusto von Dentz | 5e59b79 | 2011-11-01 10:58:57 +0200 | [diff] [blame] | 1906 | static struct sk_buff *l2cap_create_basic_pdu(struct l2cap_chan *chan, |
| 1907 | struct msghdr *msg, size_t len, |
| 1908 | u32 priority) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1909 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1910 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1911 | struct sk_buff *skb; |
Gustavo Padovan | f2ba7fa | 2012-05-03 04:54:21 -0300 | [diff] [blame] | 1912 | int err, count; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1913 | struct l2cap_hdr *lh; |
| 1914 | |
Andrei Emeltchenko | 6d5922b | 2012-02-06 15:04:01 +0200 | [diff] [blame] | 1915 | BT_DBG("chan %p len %d", chan, (int)len); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1916 | |
Gustavo Padovan | f2ba7fa | 2012-05-03 04:54:21 -0300 | [diff] [blame] | 1917 | count = min_t(unsigned int, (conn->mtu - L2CAP_HDR_SIZE), len); |
Andrei Emeltchenko | 2f7719c | 2012-01-20 14:08:03 +0200 | [diff] [blame] | 1918 | |
Gustavo Padovan | f2ba7fa | 2012-05-03 04:54:21 -0300 | [diff] [blame] | 1919 | skb = chan->ops->alloc_skb(chan, count + L2CAP_HDR_SIZE, |
Gustavo Padovan | 9033894 | 2012-04-06 20:15:47 -0300 | [diff] [blame] | 1920 | msg->msg_flags & MSG_DONTWAIT); |
| 1921 | if (IS_ERR(skb)) |
| 1922 | return skb; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1923 | |
Luiz Augusto von Dentz | 5e59b79 | 2011-11-01 10:58:57 +0200 | [diff] [blame] | 1924 | skb->priority = priority; |
| 1925 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1926 | /* Create L2CAP header */ |
| 1927 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1928 | lh->cid = cpu_to_le16(chan->dcid); |
Gustavo Padovan | 6ff9b5e | 2012-05-02 11:56:17 -0300 | [diff] [blame] | 1929 | lh->len = cpu_to_le16(len); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1930 | |
Andrei Emeltchenko | 0952a57 | 2012-01-13 17:21:43 +0200 | [diff] [blame] | 1931 | err = l2cap_skbuff_fromiovec(chan, msg, len, count, skb); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1932 | if (unlikely(err < 0)) { |
| 1933 | kfree_skb(skb); |
| 1934 | return ERR_PTR(err); |
| 1935 | } |
| 1936 | return skb; |
| 1937 | } |
| 1938 | |
Luiz Augusto von Dentz | ab0ff76 | 2011-09-12 20:00:50 +0300 | [diff] [blame] | 1939 | static struct sk_buff *l2cap_create_iframe_pdu(struct l2cap_chan *chan, |
| 1940 | struct msghdr *msg, size_t len, |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 1941 | u16 sdulen) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1942 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1943 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1944 | struct sk_buff *skb; |
Andrei Emeltchenko | e4ca6d9 | 2011-10-11 13:37:52 +0300 | [diff] [blame] | 1945 | int err, count, hlen; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1946 | struct l2cap_hdr *lh; |
| 1947 | |
Andrei Emeltchenko | 6d5922b | 2012-02-06 15:04:01 +0200 | [diff] [blame] | 1948 | BT_DBG("chan %p len %d", chan, (int)len); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1949 | |
Gustavo F. Padovan | 0ee0d20 | 2010-05-01 16:15:41 -0300 | [diff] [blame] | 1950 | if (!conn) |
| 1951 | return ERR_PTR(-ENOTCONN); |
| 1952 | |
Andrei Emeltchenko | e4ca6d9 | 2011-10-11 13:37:52 +0300 | [diff] [blame] | 1953 | if (test_bit(FLAG_EXT_CTRL, &chan->flags)) |
| 1954 | hlen = L2CAP_EXT_HDR_SIZE; |
| 1955 | else |
| 1956 | hlen = L2CAP_ENH_HDR_SIZE; |
| 1957 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1958 | if (sdulen) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 1959 | hlen += L2CAP_SDULEN_SIZE; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1960 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1961 | if (chan->fcs == L2CAP_FCS_CRC16) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 1962 | hlen += L2CAP_FCS_SIZE; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1963 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1964 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
Andrei Emeltchenko | 2f7719c | 2012-01-20 14:08:03 +0200 | [diff] [blame] | 1965 | |
| 1966 | skb = chan->ops->alloc_skb(chan, count + hlen, |
Gustavo Padovan | 9033894 | 2012-04-06 20:15:47 -0300 | [diff] [blame] | 1967 | msg->msg_flags & MSG_DONTWAIT); |
| 1968 | if (IS_ERR(skb)) |
| 1969 | return skb; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1970 | |
| 1971 | /* Create L2CAP header */ |
| 1972 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1973 | lh->cid = cpu_to_le16(chan->dcid); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1974 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1975 | |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 1976 | __put_control(chan, 0, skb_put(skb, __ctrl_size(chan))); |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1977 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1978 | if (sdulen) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 1979 | put_unaligned_le16(sdulen, skb_put(skb, L2CAP_SDULEN_SIZE)); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1980 | |
Andrei Emeltchenko | 0952a57 | 2012-01-13 17:21:43 +0200 | [diff] [blame] | 1981 | err = l2cap_skbuff_fromiovec(chan, msg, len, count, skb); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1982 | if (unlikely(err < 0)) { |
| 1983 | kfree_skb(skb); |
| 1984 | return ERR_PTR(err); |
| 1985 | } |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1986 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1987 | if (chan->fcs == L2CAP_FCS_CRC16) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 1988 | put_unaligned_le16(0, skb_put(skb, L2CAP_FCS_SIZE)); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1989 | |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 1990 | bt_cb(skb)->control.retries = 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1991 | return skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1992 | } |
| 1993 | |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 1994 | static int l2cap_segment_sdu(struct l2cap_chan *chan, |
| 1995 | struct sk_buff_head *seg_queue, |
| 1996 | struct msghdr *msg, size_t len) |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1997 | { |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1998 | struct sk_buff *skb; |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 1999 | u16 sdu_len; |
| 2000 | size_t pdu_len; |
| 2001 | int err = 0; |
| 2002 | u8 sar; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2003 | |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 2004 | BT_DBG("chan %p, msg %p, len %d", chan, msg, (int)len); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2005 | |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 2006 | /* It is critical that ERTM PDUs fit in a single HCI fragment, |
| 2007 | * so fragmented skbs are not used. The HCI layer's handling |
| 2008 | * of fragmented skbs is not compatible with ERTM's queueing. |
| 2009 | */ |
| 2010 | |
| 2011 | /* PDU size is derived from the HCI MTU */ |
| 2012 | pdu_len = chan->conn->mtu; |
| 2013 | |
| 2014 | pdu_len = min_t(size_t, pdu_len, L2CAP_BREDR_MAX_PAYLOAD); |
| 2015 | |
| 2016 | /* Adjust for largest possible L2CAP overhead. */ |
| 2017 | pdu_len -= L2CAP_EXT_HDR_SIZE + L2CAP_FCS_SIZE; |
| 2018 | |
| 2019 | /* Remote device may have requested smaller PDUs */ |
| 2020 | pdu_len = min_t(size_t, pdu_len, chan->remote_mps); |
| 2021 | |
| 2022 | if (len <= pdu_len) { |
| 2023 | sar = L2CAP_SAR_UNSEGMENTED; |
| 2024 | sdu_len = 0; |
| 2025 | pdu_len = len; |
| 2026 | } else { |
| 2027 | sar = L2CAP_SAR_START; |
| 2028 | sdu_len = len; |
| 2029 | pdu_len -= L2CAP_SDULEN_SIZE; |
| 2030 | } |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2031 | |
| 2032 | while (len > 0) { |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 2033 | skb = l2cap_create_iframe_pdu(chan, msg, pdu_len, sdu_len); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2034 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2035 | if (IS_ERR(skb)) { |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 2036 | __skb_queue_purge(seg_queue); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2037 | return PTR_ERR(skb); |
| 2038 | } |
| 2039 | |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 2040 | bt_cb(skb)->control.sar = sar; |
| 2041 | __skb_queue_tail(seg_queue, skb); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2042 | |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 2043 | len -= pdu_len; |
| 2044 | if (sdu_len) { |
| 2045 | sdu_len = 0; |
| 2046 | pdu_len += L2CAP_SDULEN_SIZE; |
| 2047 | } |
| 2048 | |
| 2049 | if (len <= pdu_len) { |
| 2050 | sar = L2CAP_SAR_END; |
| 2051 | pdu_len = len; |
| 2052 | } else { |
| 2053 | sar = L2CAP_SAR_CONTINUE; |
| 2054 | } |
| 2055 | } |
| 2056 | |
| 2057 | return err; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2058 | } |
| 2059 | |
Luiz Augusto von Dentz | 5e59b79 | 2011-11-01 10:58:57 +0200 | [diff] [blame] | 2060 | int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len, |
| 2061 | u32 priority) |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 2062 | { |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 2063 | struct sk_buff *skb; |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 2064 | int err; |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 2065 | struct sk_buff_head seg_queue; |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 2066 | |
| 2067 | /* Connectionless channel */ |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 2068 | if (chan->chan_type == L2CAP_CHAN_CONN_LESS) { |
Luiz Augusto von Dentz | 5e59b79 | 2011-11-01 10:58:57 +0200 | [diff] [blame] | 2069 | skb = l2cap_create_connless_pdu(chan, msg, len, priority); |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 2070 | if (IS_ERR(skb)) |
| 2071 | return PTR_ERR(skb); |
| 2072 | |
| 2073 | l2cap_do_send(chan, skb); |
| 2074 | return len; |
| 2075 | } |
| 2076 | |
| 2077 | switch (chan->mode) { |
| 2078 | case L2CAP_MODE_BASIC: |
| 2079 | /* Check outgoing MTU */ |
| 2080 | if (len > chan->omtu) |
| 2081 | return -EMSGSIZE; |
| 2082 | |
| 2083 | /* Create a basic PDU */ |
Luiz Augusto von Dentz | 5e59b79 | 2011-11-01 10:58:57 +0200 | [diff] [blame] | 2084 | skb = l2cap_create_basic_pdu(chan, msg, len, priority); |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 2085 | if (IS_ERR(skb)) |
| 2086 | return PTR_ERR(skb); |
| 2087 | |
| 2088 | l2cap_do_send(chan, skb); |
| 2089 | err = len; |
| 2090 | break; |
| 2091 | |
| 2092 | case L2CAP_MODE_ERTM: |
| 2093 | case L2CAP_MODE_STREAMING: |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 2094 | /* Check outgoing MTU */ |
| 2095 | if (len > chan->omtu) { |
| 2096 | err = -EMSGSIZE; |
| 2097 | break; |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 2098 | } |
| 2099 | |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 2100 | __skb_queue_head_init(&seg_queue); |
| 2101 | |
| 2102 | /* Do segmentation before calling in to the state machine, |
| 2103 | * since it's possible to block while waiting for memory |
| 2104 | * allocation. |
| 2105 | */ |
| 2106 | err = l2cap_segment_sdu(chan, &seg_queue, msg, len); |
| 2107 | |
| 2108 | /* The channel could have been closed while segmenting, |
| 2109 | * check that it is still connected. |
| 2110 | */ |
| 2111 | if (chan->state != BT_CONNECTED) { |
| 2112 | __skb_queue_purge(&seg_queue); |
| 2113 | err = -ENOTCONN; |
| 2114 | } |
| 2115 | |
| 2116 | if (err) |
| 2117 | break; |
| 2118 | |
Mat Martineau | 577cfae | 2012-05-14 11:24:33 -0700 | [diff] [blame] | 2119 | if (chan->mode == L2CAP_MODE_ERTM && chan->tx_send_head == NULL) |
| 2120 | chan->tx_send_head = seg_queue.next; |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 2121 | skb_queue_splice_tail_init(&seg_queue, &chan->tx_q); |
Mat Martineau | 577cfae | 2012-05-14 11:24:33 -0700 | [diff] [blame] | 2122 | |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 2123 | if (chan->mode == L2CAP_MODE_ERTM) |
| 2124 | err = l2cap_ertm_send(chan); |
| 2125 | else |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 2126 | l2cap_streaming_send(chan); |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 2127 | |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 2128 | if (err >= 0) |
| 2129 | err = len; |
| 2130 | |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 2131 | /* If the skbs were not queued for sending, they'll still be in |
| 2132 | * seg_queue and need to be purged. |
| 2133 | */ |
| 2134 | __skb_queue_purge(&seg_queue); |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 2135 | break; |
| 2136 | |
| 2137 | default: |
| 2138 | BT_DBG("bad state %1.1x", chan->mode); |
| 2139 | err = -EBADFD; |
| 2140 | } |
| 2141 | |
| 2142 | return err; |
| 2143 | } |
| 2144 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2145 | /* Copy frame to all raw sockets on that connection */ |
| 2146 | static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) |
| 2147 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2148 | struct sk_buff *nskb; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2149 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2150 | |
| 2151 | BT_DBG("conn %p", conn); |
| 2152 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 2153 | mutex_lock(&conn->chan_lock); |
Gustavo F. Padovan | 3d57dc6 | 2011-12-17 10:56:45 -0200 | [diff] [blame] | 2154 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 2155 | list_for_each_entry(chan, &conn->chan_l, list) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2156 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 2157 | if (chan->chan_type != L2CAP_CHAN_RAW) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2158 | continue; |
| 2159 | |
| 2160 | /* Don't send frame to the socket it came from */ |
| 2161 | if (skb->sk == sk) |
| 2162 | continue; |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2163 | nskb = skb_clone(skb, GFP_ATOMIC); |
| 2164 | if (!nskb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2165 | continue; |
| 2166 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 2167 | if (chan->ops->recv(chan->data, nskb)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2168 | kfree_skb(nskb); |
| 2169 | } |
Gustavo F. Padovan | 3d57dc6 | 2011-12-17 10:56:45 -0200 | [diff] [blame] | 2170 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 2171 | mutex_unlock(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2172 | } |
| 2173 | |
| 2174 | /* ---- L2CAP signalling commands ---- */ |
| 2175 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, |
| 2176 | u8 code, u8 ident, u16 dlen, void *data) |
| 2177 | { |
| 2178 | struct sk_buff *skb, **frag; |
| 2179 | struct l2cap_cmd_hdr *cmd; |
| 2180 | struct l2cap_hdr *lh; |
| 2181 | int len, count; |
| 2182 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2183 | BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", |
| 2184 | conn, code, ident, dlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2185 | |
| 2186 | len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; |
| 2187 | count = min_t(unsigned int, conn->mtu, len); |
| 2188 | |
| 2189 | skb = bt_skb_alloc(count, GFP_ATOMIC); |
| 2190 | if (!skb) |
| 2191 | return NULL; |
| 2192 | |
| 2193 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2194 | lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 2195 | |
| 2196 | if (conn->hcon->type == LE_LINK) |
| 2197 | lh->cid = cpu_to_le16(L2CAP_CID_LE_SIGNALING); |
| 2198 | else |
| 2199 | lh->cid = cpu_to_le16(L2CAP_CID_SIGNALING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2200 | |
| 2201 | cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); |
| 2202 | cmd->code = code; |
| 2203 | cmd->ident = ident; |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2204 | cmd->len = cpu_to_le16(dlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2205 | |
| 2206 | if (dlen) { |
| 2207 | count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; |
| 2208 | memcpy(skb_put(skb, count), data, count); |
| 2209 | data += count; |
| 2210 | } |
| 2211 | |
| 2212 | len -= skb->len; |
| 2213 | |
| 2214 | /* Continuation fragments (no L2CAP header) */ |
| 2215 | frag = &skb_shinfo(skb)->frag_list; |
| 2216 | while (len) { |
| 2217 | count = min_t(unsigned int, conn->mtu, len); |
| 2218 | |
| 2219 | *frag = bt_skb_alloc(count, GFP_ATOMIC); |
| 2220 | if (!*frag) |
| 2221 | goto fail; |
| 2222 | |
| 2223 | memcpy(skb_put(*frag, count), data, count); |
| 2224 | |
| 2225 | len -= count; |
| 2226 | data += count; |
| 2227 | |
| 2228 | frag = &(*frag)->next; |
| 2229 | } |
| 2230 | |
| 2231 | return skb; |
| 2232 | |
| 2233 | fail: |
| 2234 | kfree_skb(skb); |
| 2235 | return NULL; |
| 2236 | } |
| 2237 | |
| 2238 | static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) |
| 2239 | { |
| 2240 | struct l2cap_conf_opt *opt = *ptr; |
| 2241 | int len; |
| 2242 | |
| 2243 | len = L2CAP_CONF_OPT_SIZE + opt->len; |
| 2244 | *ptr += len; |
| 2245 | |
| 2246 | *type = opt->type; |
| 2247 | *olen = opt->len; |
| 2248 | |
| 2249 | switch (opt->len) { |
| 2250 | case 1: |
| 2251 | *val = *((u8 *) opt->val); |
| 2252 | break; |
| 2253 | |
| 2254 | case 2: |
steven miao | bfaaeb3 | 2010-10-16 18:29:47 -0400 | [diff] [blame] | 2255 | *val = get_unaligned_le16(opt->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2256 | break; |
| 2257 | |
| 2258 | case 4: |
steven miao | bfaaeb3 | 2010-10-16 18:29:47 -0400 | [diff] [blame] | 2259 | *val = get_unaligned_le32(opt->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2260 | break; |
| 2261 | |
| 2262 | default: |
| 2263 | *val = (unsigned long) opt->val; |
| 2264 | break; |
| 2265 | } |
| 2266 | |
| 2267 | BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val); |
| 2268 | return len; |
| 2269 | } |
| 2270 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2271 | static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) |
| 2272 | { |
| 2273 | struct l2cap_conf_opt *opt = *ptr; |
| 2274 | |
| 2275 | BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val); |
| 2276 | |
| 2277 | opt->type = type; |
| 2278 | opt->len = len; |
| 2279 | |
| 2280 | switch (len) { |
| 2281 | case 1: |
| 2282 | *((u8 *) opt->val) = val; |
| 2283 | break; |
| 2284 | |
| 2285 | case 2: |
Gustavo F. Padovan | 4f8b691 | 2010-10-18 14:25:53 -0200 | [diff] [blame] | 2286 | put_unaligned_le16(val, opt->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2287 | break; |
| 2288 | |
| 2289 | case 4: |
Gustavo F. Padovan | 4f8b691 | 2010-10-18 14:25:53 -0200 | [diff] [blame] | 2290 | put_unaligned_le32(val, opt->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2291 | break; |
| 2292 | |
| 2293 | default: |
| 2294 | memcpy(opt->val, (void *) val, len); |
| 2295 | break; |
| 2296 | } |
| 2297 | |
| 2298 | *ptr += L2CAP_CONF_OPT_SIZE + len; |
| 2299 | } |
| 2300 | |
Andrei Emeltchenko | f89cef0 | 2011-10-13 16:18:55 +0300 | [diff] [blame] | 2301 | static void l2cap_add_opt_efs(void **ptr, struct l2cap_chan *chan) |
| 2302 | { |
| 2303 | struct l2cap_conf_efs efs; |
| 2304 | |
Szymon Janc | 1ec918c | 2011-11-16 09:32:21 +0100 | [diff] [blame] | 2305 | switch (chan->mode) { |
Andrei Emeltchenko | f89cef0 | 2011-10-13 16:18:55 +0300 | [diff] [blame] | 2306 | case L2CAP_MODE_ERTM: |
| 2307 | efs.id = chan->local_id; |
| 2308 | efs.stype = chan->local_stype; |
| 2309 | efs.msdu = cpu_to_le16(chan->local_msdu); |
| 2310 | efs.sdu_itime = cpu_to_le32(chan->local_sdu_itime); |
| 2311 | efs.acc_lat = cpu_to_le32(L2CAP_DEFAULT_ACC_LAT); |
| 2312 | efs.flush_to = cpu_to_le32(L2CAP_DEFAULT_FLUSH_TO); |
| 2313 | break; |
| 2314 | |
| 2315 | case L2CAP_MODE_STREAMING: |
| 2316 | efs.id = 1; |
| 2317 | efs.stype = L2CAP_SERV_BESTEFFORT; |
| 2318 | efs.msdu = cpu_to_le16(chan->local_msdu); |
| 2319 | efs.sdu_itime = cpu_to_le32(chan->local_sdu_itime); |
| 2320 | efs.acc_lat = 0; |
| 2321 | efs.flush_to = 0; |
| 2322 | break; |
| 2323 | |
| 2324 | default: |
| 2325 | return; |
| 2326 | } |
| 2327 | |
| 2328 | l2cap_add_conf_opt(ptr, L2CAP_CONF_EFS, sizeof(efs), |
| 2329 | (unsigned long) &efs); |
| 2330 | } |
| 2331 | |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 2332 | static void l2cap_ack_timeout(struct work_struct *work) |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2333 | { |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 2334 | struct l2cap_chan *chan = container_of(work, struct l2cap_chan, |
| 2335 | ack_timer.work); |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2336 | |
Gustavo F. Padovan | 2fb9b3d | 2011-12-22 16:56:05 -0200 | [diff] [blame] | 2337 | BT_DBG("chan %p", chan); |
| 2338 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 2339 | l2cap_chan_lock(chan); |
| 2340 | |
Szymon Janc | b17e73b | 2012-01-11 10:59:47 +0100 | [diff] [blame] | 2341 | __l2cap_send_ack(chan); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 2342 | |
| 2343 | l2cap_chan_unlock(chan); |
Szymon Janc | 09bfb2e | 2012-01-11 10:59:49 +0100 | [diff] [blame] | 2344 | |
| 2345 | l2cap_chan_put(chan); |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2346 | } |
| 2347 | |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 2348 | static inline int l2cap_ertm_init(struct l2cap_chan *chan) |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2349 | { |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 2350 | int err; |
| 2351 | |
Mat Martineau | 105bdf9 | 2012-04-27 16:50:48 -0700 | [diff] [blame] | 2352 | chan->next_tx_seq = 0; |
| 2353 | chan->expected_tx_seq = 0; |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 2354 | chan->expected_ack_seq = 0; |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 2355 | chan->unacked_frames = 0; |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 2356 | chan->buffer_seq = 0; |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 2357 | chan->num_acked = 0; |
| 2358 | chan->frames_sent = 0; |
Mat Martineau | 105bdf9 | 2012-04-27 16:50:48 -0700 | [diff] [blame] | 2359 | chan->last_acked_seq = 0; |
| 2360 | chan->sdu = NULL; |
| 2361 | chan->sdu_last_frag = NULL; |
| 2362 | chan->sdu_len = 0; |
| 2363 | |
Mat Martineau | d34c34f | 2012-05-14 14:49:27 -0700 | [diff] [blame] | 2364 | skb_queue_head_init(&chan->tx_q); |
| 2365 | |
Mat Martineau | 105bdf9 | 2012-04-27 16:50:48 -0700 | [diff] [blame] | 2366 | if (chan->mode != L2CAP_MODE_ERTM) |
| 2367 | return 0; |
| 2368 | |
| 2369 | chan->rx_state = L2CAP_RX_STATE_RECV; |
| 2370 | chan->tx_state = L2CAP_TX_STATE_XMIT; |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2371 | |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 2372 | INIT_DELAYED_WORK(&chan->retrans_timer, l2cap_retrans_timeout); |
| 2373 | INIT_DELAYED_WORK(&chan->monitor_timer, l2cap_monitor_timeout); |
| 2374 | INIT_DELAYED_WORK(&chan->ack_timer, l2cap_ack_timeout); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2375 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 2376 | skb_queue_head_init(&chan->srej_q); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 2377 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 2378 | INIT_LIST_HEAD(&chan->srej_l); |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 2379 | err = l2cap_seq_list_init(&chan->srej_list, chan->tx_win); |
| 2380 | if (err < 0) |
| 2381 | return err; |
| 2382 | |
| 2383 | return l2cap_seq_list_init(&chan->retrans_list, chan->remote_tx_win); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2384 | } |
| 2385 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2386 | static inline __u8 l2cap_select_mode(__u8 mode, __u16 remote_feat_mask) |
| 2387 | { |
| 2388 | switch (mode) { |
| 2389 | case L2CAP_MODE_STREAMING: |
| 2390 | case L2CAP_MODE_ERTM: |
| 2391 | if (l2cap_mode_supported(mode, remote_feat_mask)) |
| 2392 | return mode; |
| 2393 | /* fall through */ |
| 2394 | default: |
| 2395 | return L2CAP_MODE_BASIC; |
| 2396 | } |
| 2397 | } |
| 2398 | |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2399 | static inline bool __l2cap_ews_supported(struct l2cap_chan *chan) |
| 2400 | { |
| 2401 | return enable_hs && chan->conn->feat_mask & L2CAP_FEAT_EXT_WINDOW; |
| 2402 | } |
| 2403 | |
Andrei Emeltchenko | f89cef0 | 2011-10-13 16:18:55 +0300 | [diff] [blame] | 2404 | static inline bool __l2cap_efs_supported(struct l2cap_chan *chan) |
| 2405 | { |
| 2406 | return enable_hs && chan->conn->feat_mask & L2CAP_FEAT_EXT_FLOW; |
| 2407 | } |
| 2408 | |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2409 | static inline void l2cap_txwin_setup(struct l2cap_chan *chan) |
| 2410 | { |
| 2411 | if (chan->tx_win > L2CAP_DEFAULT_TX_WINDOW && |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 2412 | __l2cap_ews_supported(chan)) { |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2413 | /* use extended control field */ |
| 2414 | set_bit(FLAG_EXT_CTRL, &chan->flags); |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 2415 | chan->tx_win_max = L2CAP_DEFAULT_EXT_WINDOW; |
| 2416 | } else { |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2417 | chan->tx_win = min_t(u16, chan->tx_win, |
| 2418 | L2CAP_DEFAULT_TX_WINDOW); |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 2419 | chan->tx_win_max = L2CAP_DEFAULT_TX_WINDOW; |
| 2420 | } |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2421 | } |
| 2422 | |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2423 | static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2424 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2425 | struct l2cap_conf_req *req = data; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2426 | struct l2cap_conf_rfc rfc = { .mode = chan->mode }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2427 | void *ptr = req->data; |
Andrei Emeltchenko | c8f7916 | 2011-10-17 12:19:59 +0300 | [diff] [blame] | 2428 | u16 size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2429 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 2430 | BT_DBG("chan %p", chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2431 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2432 | if (chan->num_conf_req || chan->num_conf_rsp) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2433 | goto done; |
| 2434 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2435 | switch (chan->mode) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2436 | case L2CAP_MODE_STREAMING: |
| 2437 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2438 | if (test_bit(CONF_STATE2_DEVICE, &chan->conf_state)) |
Gustavo F. Padovan | 85eb53c | 2010-06-03 18:43:28 -0300 | [diff] [blame] | 2439 | break; |
Gustavo F. Padovan | 85eb53c | 2010-06-03 18:43:28 -0300 | [diff] [blame] | 2440 | |
Andrei Emeltchenko | f89cef0 | 2011-10-13 16:18:55 +0300 | [diff] [blame] | 2441 | if (__l2cap_efs_supported(chan)) |
| 2442 | set_bit(FLAG_EFS_ENABLE, &chan->flags); |
| 2443 | |
Gustavo F. Padovan | 2ba13ed | 2010-06-09 16:39:05 -0300 | [diff] [blame] | 2444 | /* fall through */ |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2445 | default: |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2446 | chan->mode = l2cap_select_mode(rfc.mode, chan->conn->feat_mask); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2447 | break; |
| 2448 | } |
| 2449 | |
| 2450 | done: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2451 | if (chan->imtu != L2CAP_DEFAULT_MTU) |
| 2452 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu); |
Gustavo F. Padovan | 7990681c | 2011-01-24 16:01:43 -0200 | [diff] [blame] | 2453 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2454 | switch (chan->mode) { |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 2455 | case L2CAP_MODE_BASIC: |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2456 | if (!(chan->conn->feat_mask & L2CAP_FEAT_ERTM) && |
| 2457 | !(chan->conn->feat_mask & L2CAP_FEAT_STREAMING)) |
Gustavo F. Padovan | 6340650 | 2010-08-03 23:49:29 -0300 | [diff] [blame] | 2458 | break; |
| 2459 | |
Gustavo F. Padovan | 6254775 | 2010-06-08 20:05:31 -0300 | [diff] [blame] | 2460 | rfc.mode = L2CAP_MODE_BASIC; |
| 2461 | rfc.txwin_size = 0; |
| 2462 | rfc.max_transmit = 0; |
| 2463 | rfc.retrans_timeout = 0; |
| 2464 | rfc.monitor_timeout = 0; |
| 2465 | rfc.max_pdu_size = 0; |
| 2466 | |
Gustavo F. Padovan | 6340650 | 2010-08-03 23:49:29 -0300 | [diff] [blame] | 2467 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
| 2468 | (unsigned long) &rfc); |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 2469 | break; |
| 2470 | |
| 2471 | case L2CAP_MODE_ERTM: |
| 2472 | rfc.mode = L2CAP_MODE_ERTM; |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2473 | rfc.max_transmit = chan->max_tx; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2474 | rfc.retrans_timeout = 0; |
| 2475 | rfc.monitor_timeout = 0; |
Andrei Emeltchenko | c8f7916 | 2011-10-17 12:19:59 +0300 | [diff] [blame] | 2476 | |
| 2477 | size = min_t(u16, L2CAP_DEFAULT_MAX_PDU_SIZE, chan->conn->mtu - |
| 2478 | L2CAP_EXT_HDR_SIZE - |
| 2479 | L2CAP_SDULEN_SIZE - |
| 2480 | L2CAP_FCS_SIZE); |
| 2481 | rfc.max_pdu_size = cpu_to_le16(size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2482 | |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2483 | l2cap_txwin_setup(chan); |
| 2484 | |
| 2485 | rfc.txwin_size = min_t(u16, chan->tx_win, |
| 2486 | L2CAP_DEFAULT_TX_WINDOW); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2487 | |
Gustavo F. Padovan | 6340650 | 2010-08-03 23:49:29 -0300 | [diff] [blame] | 2488 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
| 2489 | (unsigned long) &rfc); |
| 2490 | |
Andrei Emeltchenko | f89cef0 | 2011-10-13 16:18:55 +0300 | [diff] [blame] | 2491 | if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) |
| 2492 | l2cap_add_opt_efs(&ptr, chan); |
| 2493 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2494 | if (!(chan->conn->feat_mask & L2CAP_FEAT_FCS)) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2495 | break; |
| 2496 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2497 | if (chan->fcs == L2CAP_FCS_NONE || |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2498 | test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2499 | chan->fcs = L2CAP_FCS_NONE; |
| 2500 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, chan->fcs); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2501 | } |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2502 | |
| 2503 | if (test_bit(FLAG_EXT_CTRL, &chan->flags)) |
| 2504 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_EWS, 2, |
| 2505 | chan->tx_win); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2506 | break; |
| 2507 | |
| 2508 | case L2CAP_MODE_STREAMING: |
| 2509 | rfc.mode = L2CAP_MODE_STREAMING; |
| 2510 | rfc.txwin_size = 0; |
| 2511 | rfc.max_transmit = 0; |
| 2512 | rfc.retrans_timeout = 0; |
| 2513 | rfc.monitor_timeout = 0; |
Andrei Emeltchenko | c8f7916 | 2011-10-17 12:19:59 +0300 | [diff] [blame] | 2514 | |
| 2515 | size = min_t(u16, L2CAP_DEFAULT_MAX_PDU_SIZE, chan->conn->mtu - |
| 2516 | L2CAP_EXT_HDR_SIZE - |
| 2517 | L2CAP_SDULEN_SIZE - |
| 2518 | L2CAP_FCS_SIZE); |
| 2519 | rfc.max_pdu_size = cpu_to_le16(size); |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 2520 | |
Gustavo F. Padovan | 6340650 | 2010-08-03 23:49:29 -0300 | [diff] [blame] | 2521 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
| 2522 | (unsigned long) &rfc); |
| 2523 | |
Andrei Emeltchenko | f89cef0 | 2011-10-13 16:18:55 +0300 | [diff] [blame] | 2524 | if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) |
| 2525 | l2cap_add_opt_efs(&ptr, chan); |
| 2526 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2527 | if (!(chan->conn->feat_mask & L2CAP_FEAT_FCS)) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2528 | break; |
| 2529 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2530 | if (chan->fcs == L2CAP_FCS_NONE || |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2531 | test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2532 | chan->fcs = L2CAP_FCS_NONE; |
| 2533 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, chan->fcs); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2534 | } |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 2535 | break; |
| 2536 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2537 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2538 | req->dcid = cpu_to_le16(chan->dcid); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2539 | req->flags = cpu_to_le16(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2540 | |
| 2541 | return ptr - data; |
| 2542 | } |
| 2543 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2544 | static int l2cap_parse_conf_req(struct l2cap_chan *chan, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2545 | { |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2546 | struct l2cap_conf_rsp *rsp = data; |
| 2547 | void *ptr = rsp->data; |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2548 | void *req = chan->conf_req; |
| 2549 | int len = chan->conf_len; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2550 | int type, hint, olen; |
| 2551 | unsigned long val; |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2552 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 2553 | struct l2cap_conf_efs efs; |
| 2554 | u8 remote_efs = 0; |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 2555 | u16 mtu = L2CAP_DEFAULT_MTU; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2556 | u16 result = L2CAP_CONF_SUCCESS; |
Andrei Emeltchenko | c8f7916 | 2011-10-17 12:19:59 +0300 | [diff] [blame] | 2557 | u16 size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2558 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2559 | BT_DBG("chan %p", chan); |
Marcel Holtmann | 820ae1b | 2006-11-18 22:15:00 +0100 | [diff] [blame] | 2560 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2561 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 2562 | len -= l2cap_get_conf_opt(&req, &type, &olen, &val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2563 | |
Gustavo F. Padovan | 589d274 | 2009-04-20 01:31:07 -0300 | [diff] [blame] | 2564 | hint = type & L2CAP_CONF_HINT; |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 2565 | type &= L2CAP_CONF_MASK; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2566 | |
| 2567 | switch (type) { |
| 2568 | case L2CAP_CONF_MTU: |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 2569 | mtu = val; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2570 | break; |
| 2571 | |
| 2572 | case L2CAP_CONF_FLUSH_TO: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2573 | chan->flush_to = val; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2574 | break; |
| 2575 | |
| 2576 | case L2CAP_CONF_QOS: |
| 2577 | break; |
| 2578 | |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2579 | case L2CAP_CONF_RFC: |
| 2580 | if (olen == sizeof(rfc)) |
| 2581 | memcpy(&rfc, (void *) val, olen); |
| 2582 | break; |
| 2583 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2584 | case L2CAP_CONF_FCS: |
| 2585 | if (val == L2CAP_FCS_NONE) |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2586 | set_bit(CONF_NO_FCS_RECV, &chan->conf_state); |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 2587 | break; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2588 | |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 2589 | case L2CAP_CONF_EFS: |
| 2590 | remote_efs = 1; |
| 2591 | if (olen == sizeof(efs)) |
| 2592 | memcpy(&efs, (void *) val, olen); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2593 | break; |
| 2594 | |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2595 | case L2CAP_CONF_EWS: |
| 2596 | if (!enable_hs) |
| 2597 | return -ECONNREFUSED; |
| 2598 | |
| 2599 | set_bit(FLAG_EXT_CTRL, &chan->flags); |
| 2600 | set_bit(CONF_EWS_RECV, &chan->conf_state); |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 2601 | chan->tx_win_max = L2CAP_DEFAULT_EXT_WINDOW; |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2602 | chan->remote_tx_win = val; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2603 | break; |
| 2604 | |
| 2605 | default: |
| 2606 | if (hint) |
| 2607 | break; |
| 2608 | |
| 2609 | result = L2CAP_CONF_UNKNOWN; |
| 2610 | *((u8 *) ptr++) = type; |
| 2611 | break; |
| 2612 | } |
| 2613 | } |
| 2614 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2615 | if (chan->num_conf_rsp || chan->num_conf_req > 1) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2616 | goto done; |
| 2617 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2618 | switch (chan->mode) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2619 | case L2CAP_MODE_STREAMING: |
| 2620 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2621 | if (!test_bit(CONF_STATE2_DEVICE, &chan->conf_state)) { |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2622 | chan->mode = l2cap_select_mode(rfc.mode, |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2623 | chan->conn->feat_mask); |
Gustavo F. Padovan | 85eb53c | 2010-06-03 18:43:28 -0300 | [diff] [blame] | 2624 | break; |
| 2625 | } |
| 2626 | |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 2627 | if (remote_efs) { |
| 2628 | if (__l2cap_efs_supported(chan)) |
| 2629 | set_bit(FLAG_EFS_ENABLE, &chan->flags); |
| 2630 | else |
| 2631 | return -ECONNREFUSED; |
| 2632 | } |
| 2633 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2634 | if (chan->mode != rfc.mode) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2635 | return -ECONNREFUSED; |
Gustavo F. Padovan | 742e519 | 2010-06-08 19:09:48 -0300 | [diff] [blame] | 2636 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2637 | break; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2638 | } |
| 2639 | |
| 2640 | done: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2641 | if (chan->mode != rfc.mode) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2642 | result = L2CAP_CONF_UNACCEPT; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2643 | rfc.mode = chan->mode; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2644 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2645 | if (chan->num_conf_rsp == 1) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2646 | return -ECONNREFUSED; |
| 2647 | |
| 2648 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2649 | sizeof(rfc), (unsigned long) &rfc); |
| 2650 | } |
| 2651 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2652 | if (result == L2CAP_CONF_SUCCESS) { |
| 2653 | /* Configure output options and let the other side know |
| 2654 | * which ones we don't like. */ |
| 2655 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2656 | if (mtu < L2CAP_DEFAULT_MIN_MTU) |
| 2657 | result = L2CAP_CONF_UNACCEPT; |
| 2658 | else { |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2659 | chan->omtu = mtu; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2660 | set_bit(CONF_MTU_DONE, &chan->conf_state); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2661 | } |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2662 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->omtu); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2663 | |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 2664 | if (remote_efs) { |
| 2665 | if (chan->local_stype != L2CAP_SERV_NOTRAFIC && |
| 2666 | efs.stype != L2CAP_SERV_NOTRAFIC && |
| 2667 | efs.stype != chan->local_stype) { |
| 2668 | |
| 2669 | result = L2CAP_CONF_UNACCEPT; |
| 2670 | |
| 2671 | if (chan->num_conf_req >= 1) |
| 2672 | return -ECONNREFUSED; |
| 2673 | |
| 2674 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, |
Gustavo F. Padovan | 3e6b3b9 | 2011-11-01 14:06:23 -0200 | [diff] [blame] | 2675 | sizeof(efs), |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 2676 | (unsigned long) &efs); |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 2677 | } else { |
Gustavo F. Padovan | 3e6b3b9 | 2011-11-01 14:06:23 -0200 | [diff] [blame] | 2678 | /* Send PENDING Conf Rsp */ |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 2679 | result = L2CAP_CONF_PENDING; |
| 2680 | set_bit(CONF_LOC_CONF_PEND, &chan->conf_state); |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 2681 | } |
| 2682 | } |
| 2683 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2684 | switch (rfc.mode) { |
| 2685 | case L2CAP_MODE_BASIC: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2686 | chan->fcs = L2CAP_FCS_NONE; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2687 | set_bit(CONF_MODE_DONE, &chan->conf_state); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2688 | break; |
| 2689 | |
| 2690 | case L2CAP_MODE_ERTM: |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2691 | if (!test_bit(CONF_EWS_RECV, &chan->conf_state)) |
| 2692 | chan->remote_tx_win = rfc.txwin_size; |
| 2693 | else |
| 2694 | rfc.txwin_size = L2CAP_DEFAULT_TX_WINDOW; |
| 2695 | |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 2696 | chan->remote_max_tx = rfc.max_transmit; |
Mat Martineau | 86b1b26 | 2010-08-05 15:54:22 -0700 | [diff] [blame] | 2697 | |
Andrei Emeltchenko | c8f7916 | 2011-10-17 12:19:59 +0300 | [diff] [blame] | 2698 | size = min_t(u16, le16_to_cpu(rfc.max_pdu_size), |
| 2699 | chan->conn->mtu - |
| 2700 | L2CAP_EXT_HDR_SIZE - |
| 2701 | L2CAP_SDULEN_SIZE - |
| 2702 | L2CAP_FCS_SIZE); |
| 2703 | rfc.max_pdu_size = cpu_to_le16(size); |
| 2704 | chan->remote_mps = size; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2705 | |
Gustavo F. Padovan | 10467e9 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2706 | rfc.retrans_timeout = |
Andrei Emeltchenko | 4fd21a8 | 2012-03-12 12:13:10 +0200 | [diff] [blame] | 2707 | __constant_cpu_to_le16(L2CAP_DEFAULT_RETRANS_TO); |
Gustavo F. Padovan | 10467e9 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2708 | rfc.monitor_timeout = |
Andrei Emeltchenko | 4fd21a8 | 2012-03-12 12:13:10 +0200 | [diff] [blame] | 2709 | __constant_cpu_to_le16(L2CAP_DEFAULT_MONITOR_TO); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2710 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2711 | set_bit(CONF_MODE_DONE, &chan->conf_state); |
Gustavo F. Padovan | 68ae663 | 2009-10-17 21:41:01 -0300 | [diff] [blame] | 2712 | |
| 2713 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2714 | sizeof(rfc), (unsigned long) &rfc); |
| 2715 | |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 2716 | if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) { |
| 2717 | chan->remote_id = efs.id; |
| 2718 | chan->remote_stype = efs.stype; |
| 2719 | chan->remote_msdu = le16_to_cpu(efs.msdu); |
| 2720 | chan->remote_flush_to = |
| 2721 | le32_to_cpu(efs.flush_to); |
| 2722 | chan->remote_acc_lat = |
| 2723 | le32_to_cpu(efs.acc_lat); |
| 2724 | chan->remote_sdu_itime = |
| 2725 | le32_to_cpu(efs.sdu_itime); |
| 2726 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, |
| 2727 | sizeof(efs), (unsigned long) &efs); |
| 2728 | } |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2729 | break; |
| 2730 | |
| 2731 | case L2CAP_MODE_STREAMING: |
Andrei Emeltchenko | c8f7916 | 2011-10-17 12:19:59 +0300 | [diff] [blame] | 2732 | size = min_t(u16, le16_to_cpu(rfc.max_pdu_size), |
| 2733 | chan->conn->mtu - |
| 2734 | L2CAP_EXT_HDR_SIZE - |
| 2735 | L2CAP_SDULEN_SIZE - |
| 2736 | L2CAP_FCS_SIZE); |
| 2737 | rfc.max_pdu_size = cpu_to_le16(size); |
| 2738 | chan->remote_mps = size; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2739 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2740 | set_bit(CONF_MODE_DONE, &chan->conf_state); |
Gustavo F. Padovan | 68ae663 | 2009-10-17 21:41:01 -0300 | [diff] [blame] | 2741 | |
| 2742 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2743 | sizeof(rfc), (unsigned long) &rfc); |
| 2744 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2745 | break; |
| 2746 | |
| 2747 | default: |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2748 | result = L2CAP_CONF_UNACCEPT; |
| 2749 | |
| 2750 | memset(&rfc, 0, sizeof(rfc)); |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2751 | rfc.mode = chan->mode; |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2752 | } |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2753 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2754 | if (result == L2CAP_CONF_SUCCESS) |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2755 | set_bit(CONF_OUTPUT_DONE, &chan->conf_state); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2756 | } |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2757 | rsp->scid = cpu_to_le16(chan->dcid); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2758 | rsp->result = cpu_to_le16(result); |
| 2759 | rsp->flags = cpu_to_le16(0x0000); |
| 2760 | |
| 2761 | return ptr - data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2762 | } |
| 2763 | |
Gustavo F. Padovan | b445003 | 2011-04-12 18:15:09 -0300 | [diff] [blame] | 2764 | static int l2cap_parse_conf_rsp(struct l2cap_chan *chan, void *rsp, int len, void *data, u16 *result) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2765 | { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2766 | struct l2cap_conf_req *req = data; |
| 2767 | void *ptr = req->data; |
| 2768 | int type, olen; |
| 2769 | unsigned long val; |
Mat Martineau | 36e999a | 2011-12-08 17:23:21 -0800 | [diff] [blame] | 2770 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
Andrei Emeltchenko | 66af7aa | 2011-11-07 14:20:33 +0200 | [diff] [blame] | 2771 | struct l2cap_conf_efs efs; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2772 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2773 | BT_DBG("chan %p, rsp %p, len %d, req %p", chan, rsp, len, data); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2774 | |
| 2775 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 2776 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); |
| 2777 | |
| 2778 | switch (type) { |
| 2779 | case L2CAP_CONF_MTU: |
| 2780 | if (val < L2CAP_DEFAULT_MIN_MTU) { |
| 2781 | *result = L2CAP_CONF_UNACCEPT; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2782 | chan->imtu = L2CAP_DEFAULT_MIN_MTU; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2783 | } else |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2784 | chan->imtu = val; |
| 2785 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2786 | break; |
| 2787 | |
| 2788 | case L2CAP_CONF_FLUSH_TO: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2789 | chan->flush_to = val; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2790 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2791 | 2, chan->flush_to); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2792 | break; |
| 2793 | |
| 2794 | case L2CAP_CONF_RFC: |
| 2795 | if (olen == sizeof(rfc)) |
| 2796 | memcpy(&rfc, (void *)val, olen); |
| 2797 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2798 | if (test_bit(CONF_STATE2_DEVICE, &chan->conf_state) && |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2799 | rfc.mode != chan->mode) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2800 | return -ECONNREFUSED; |
| 2801 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2802 | chan->fcs = 0; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2803 | |
| 2804 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2805 | sizeof(rfc), (unsigned long) &rfc); |
| 2806 | break; |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2807 | |
| 2808 | case L2CAP_CONF_EWS: |
| 2809 | chan->tx_win = min_t(u16, val, |
| 2810 | L2CAP_DEFAULT_EXT_WINDOW); |
Gustavo F. Padovan | 3e6b3b9 | 2011-11-01 14:06:23 -0200 | [diff] [blame] | 2811 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_EWS, 2, |
| 2812 | chan->tx_win); |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2813 | break; |
Andrei Emeltchenko | 66af7aa | 2011-11-07 14:20:33 +0200 | [diff] [blame] | 2814 | |
| 2815 | case L2CAP_CONF_EFS: |
| 2816 | if (olen == sizeof(efs)) |
| 2817 | memcpy(&efs, (void *)val, olen); |
| 2818 | |
| 2819 | if (chan->local_stype != L2CAP_SERV_NOTRAFIC && |
| 2820 | efs.stype != L2CAP_SERV_NOTRAFIC && |
| 2821 | efs.stype != chan->local_stype) |
| 2822 | return -ECONNREFUSED; |
| 2823 | |
| 2824 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, |
| 2825 | sizeof(efs), (unsigned long) &efs); |
| 2826 | break; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2827 | } |
| 2828 | } |
| 2829 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2830 | if (chan->mode == L2CAP_MODE_BASIC && chan->mode != rfc.mode) |
Gustavo F. Padovan | 6c2ea7a | 2010-06-08 20:08:49 -0300 | [diff] [blame] | 2831 | return -ECONNREFUSED; |
| 2832 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2833 | chan->mode = rfc.mode; |
Gustavo F. Padovan | 6c2ea7a | 2010-06-08 20:08:49 -0300 | [diff] [blame] | 2834 | |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 2835 | if (*result == L2CAP_CONF_SUCCESS || *result == L2CAP_CONF_PENDING) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2836 | switch (rfc.mode) { |
| 2837 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2838 | chan->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); |
| 2839 | chan->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); |
| 2840 | chan->mps = le16_to_cpu(rfc.max_pdu_size); |
Andrei Emeltchenko | 66af7aa | 2011-11-07 14:20:33 +0200 | [diff] [blame] | 2841 | |
| 2842 | if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) { |
| 2843 | chan->local_msdu = le16_to_cpu(efs.msdu); |
| 2844 | chan->local_sdu_itime = |
| 2845 | le32_to_cpu(efs.sdu_itime); |
| 2846 | chan->local_acc_lat = le32_to_cpu(efs.acc_lat); |
| 2847 | chan->local_flush_to = |
| 2848 | le32_to_cpu(efs.flush_to); |
| 2849 | } |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2850 | break; |
Andrei Emeltchenko | 66af7aa | 2011-11-07 14:20:33 +0200 | [diff] [blame] | 2851 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2852 | case L2CAP_MODE_STREAMING: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2853 | chan->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2854 | } |
| 2855 | } |
| 2856 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2857 | req->dcid = cpu_to_le16(chan->dcid); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2858 | req->flags = cpu_to_le16(0x0000); |
| 2859 | |
| 2860 | return ptr - data; |
| 2861 | } |
| 2862 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2863 | static int l2cap_build_conf_rsp(struct l2cap_chan *chan, void *data, u16 result, u16 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2864 | { |
| 2865 | struct l2cap_conf_rsp *rsp = data; |
| 2866 | void *ptr = rsp->data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2867 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2868 | BT_DBG("chan %p", chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2869 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2870 | rsp->scid = cpu_to_le16(chan->dcid); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2871 | rsp->result = cpu_to_le16(result); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2872 | rsp->flags = cpu_to_le16(flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2873 | |
| 2874 | return ptr - data; |
| 2875 | } |
| 2876 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2877 | void __l2cap_connect_rsp_defer(struct l2cap_chan *chan) |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2878 | { |
| 2879 | struct l2cap_conn_rsp rsp; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2880 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2881 | u8 buf[128]; |
| 2882 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2883 | rsp.scid = cpu_to_le16(chan->dcid); |
| 2884 | rsp.dcid = cpu_to_le16(chan->scid); |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2885 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); |
| 2886 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 2887 | l2cap_send_cmd(conn, chan->ident, |
| 2888 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
| 2889 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2890 | if (test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2891 | return; |
| 2892 | |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2893 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
| 2894 | l2cap_build_conf_req(chan, buf), buf); |
| 2895 | chan->num_conf_req++; |
| 2896 | } |
| 2897 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2898 | static void l2cap_conf_rfc_get(struct l2cap_chan *chan, void *rsp, int len) |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2899 | { |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2900 | int type, olen; |
| 2901 | unsigned long val; |
| 2902 | struct l2cap_conf_rfc rfc; |
| 2903 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2904 | BT_DBG("chan %p, rsp %p, len %d", chan, rsp, len); |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2905 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2906 | if ((chan->mode != L2CAP_MODE_ERTM) && (chan->mode != L2CAP_MODE_STREAMING)) |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2907 | return; |
| 2908 | |
| 2909 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 2910 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); |
| 2911 | |
| 2912 | switch (type) { |
| 2913 | case L2CAP_CONF_RFC: |
| 2914 | if (olen == sizeof(rfc)) |
| 2915 | memcpy(&rfc, (void *)val, olen); |
| 2916 | goto done; |
| 2917 | } |
| 2918 | } |
| 2919 | |
Mat Martineau | 36e999a | 2011-12-08 17:23:21 -0800 | [diff] [blame] | 2920 | /* Use sane default values in case a misbehaving remote device |
| 2921 | * did not send an RFC option. |
| 2922 | */ |
| 2923 | rfc.mode = chan->mode; |
| 2924 | rfc.retrans_timeout = cpu_to_le16(L2CAP_DEFAULT_RETRANS_TO); |
| 2925 | rfc.monitor_timeout = cpu_to_le16(L2CAP_DEFAULT_MONITOR_TO); |
| 2926 | rfc.max_pdu_size = cpu_to_le16(chan->imtu); |
| 2927 | |
| 2928 | BT_ERR("Expected RFC option was not found, using defaults"); |
| 2929 | |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2930 | done: |
| 2931 | switch (rfc.mode) { |
| 2932 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2933 | chan->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); |
| 2934 | chan->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); |
| 2935 | chan->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2936 | break; |
| 2937 | case L2CAP_MODE_STREAMING: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2938 | chan->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2939 | } |
| 2940 | } |
| 2941 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2942 | static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2943 | { |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 2944 | struct l2cap_cmd_rej_unk *rej = (struct l2cap_cmd_rej_unk *) data; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2945 | |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 2946 | if (rej->reason != L2CAP_REJ_NOT_UNDERSTOOD) |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2947 | return 0; |
| 2948 | |
| 2949 | if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) && |
| 2950 | cmd->ident == conn->info_ident) { |
Ulisses Furquim | 17cd3f3 | 2012-01-30 18:26:28 -0200 | [diff] [blame] | 2951 | cancel_delayed_work(&conn->info_timer); |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2952 | |
| 2953 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 2954 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2955 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2956 | l2cap_conn_start(conn); |
| 2957 | } |
| 2958 | |
| 2959 | return 0; |
| 2960 | } |
| 2961 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2962 | static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2963 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2964 | struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; |
| 2965 | struct l2cap_conn_rsp rsp; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 2966 | struct l2cap_chan *chan = NULL, *pchan; |
Nathan Holstein | d793fe8 | 2010-10-15 11:54:02 -0400 | [diff] [blame] | 2967 | struct sock *parent, *sk = NULL; |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2968 | int result, status = L2CAP_CS_NO_INFO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2969 | |
| 2970 | u16 dcid = 0, scid = __le16_to_cpu(req->scid); |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2971 | __le16 psm = req->psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2972 | |
Andrei Emeltchenko | 097db76 | 2012-03-09 14:16:17 +0200 | [diff] [blame] | 2973 | BT_DBG("psm 0x%2.2x scid 0x%4.4x", __le16_to_cpu(psm), scid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2974 | |
| 2975 | /* Check if we have socket listening on psm */ |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 2976 | pchan = l2cap_global_chan_by_psm(BT_LISTEN, psm, conn->src, conn->dst); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 2977 | if (!pchan) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2978 | result = L2CAP_CR_BAD_PSM; |
| 2979 | goto sendresp; |
| 2980 | } |
| 2981 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 2982 | parent = pchan->sk; |
| 2983 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 2984 | mutex_lock(&conn->chan_lock); |
Gustavo F. Padovan | aa2ac88 | 2011-06-24 01:53:01 -0300 | [diff] [blame] | 2985 | lock_sock(parent); |
Gustavo F. Padovan | e0f0cb5 | 2010-11-01 18:43:53 +0000 | [diff] [blame] | 2986 | |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2987 | /* Check if the ACL is secure enough (if not SDP) */ |
| 2988 | if (psm != cpu_to_le16(0x0001) && |
| 2989 | !hci_conn_check_link_mode(conn->hcon)) { |
Andrei Emeltchenko | 9f5a0d7 | 2011-11-07 14:20:25 +0200 | [diff] [blame] | 2990 | conn->disc_reason = HCI_ERROR_AUTH_FAILURE; |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2991 | result = L2CAP_CR_SEC_BLOCK; |
| 2992 | goto response; |
| 2993 | } |
| 2994 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2995 | result = L2CAP_CR_NO_MEM; |
| 2996 | |
| 2997 | /* Check for backlog size */ |
| 2998 | if (sk_acceptq_is_full(parent)) { |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 2999 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3000 | goto response; |
| 3001 | } |
| 3002 | |
Gustavo F. Padovan | 80808e4 | 2011-05-16 17:24:37 -0300 | [diff] [blame] | 3003 | chan = pchan->ops->new_connection(pchan->data); |
| 3004 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3005 | goto response; |
| 3006 | |
Gustavo F. Padovan | 80808e4 | 2011-05-16 17:24:37 -0300 | [diff] [blame] | 3007 | sk = chan->sk; |
| 3008 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3009 | /* Check if we already have channel with that dcid */ |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 3010 | if (__l2cap_get_chan_by_dcid(conn, scid)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3011 | sock_set_flag(sk, SOCK_ZAPPED); |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 3012 | chan->ops->close(chan->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3013 | goto response; |
| 3014 | } |
| 3015 | |
| 3016 | hci_conn_hold(conn->hcon); |
| 3017 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3018 | bacpy(&bt_sk(sk)->src, conn->src); |
| 3019 | bacpy(&bt_sk(sk)->dst, conn->dst); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 3020 | chan->psm = psm; |
| 3021 | chan->dcid = scid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3022 | |
Gustavo F. Padovan | d101024 | 2011-03-25 00:39:48 -0300 | [diff] [blame] | 3023 | bt_accept_enqueue(parent, sk); |
| 3024 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3025 | __l2cap_chan_add(conn, chan); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3026 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 3027 | dcid = chan->scid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3028 | |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 3029 | __set_chan_timer(chan, sk->sk_sndtimeo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3030 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 3031 | chan->ident = cmd->ident; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3032 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 3033 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) { |
Gustavo F. Padovan | d45fc42 | 2011-11-05 19:54:24 -0200 | [diff] [blame] | 3034 | if (l2cap_chan_check_security(chan)) { |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 3035 | if (bt_sk(sk)->defer_setup) { |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 3036 | __l2cap_state_change(chan, BT_CONNECT2); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 3037 | result = L2CAP_CR_PEND; |
| 3038 | status = L2CAP_CS_AUTHOR_PEND; |
| 3039 | parent->sk_data_ready(parent, 0); |
| 3040 | } else { |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 3041 | __l2cap_state_change(chan, BT_CONFIG); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 3042 | result = L2CAP_CR_SUCCESS; |
| 3043 | status = L2CAP_CS_NO_INFO; |
| 3044 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 3045 | } else { |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 3046 | __l2cap_state_change(chan, BT_CONNECT2); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 3047 | result = L2CAP_CR_PEND; |
| 3048 | status = L2CAP_CS_AUTHEN_PEND; |
| 3049 | } |
| 3050 | } else { |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 3051 | __l2cap_state_change(chan, BT_CONNECT2); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 3052 | result = L2CAP_CR_PEND; |
| 3053 | status = L2CAP_CS_NO_INFO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3054 | } |
| 3055 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3056 | response: |
Gustavo F. Padovan | aa2ac88 | 2011-06-24 01:53:01 -0300 | [diff] [blame] | 3057 | release_sock(parent); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3058 | mutex_unlock(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3059 | |
| 3060 | sendresp: |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 3061 | rsp.scid = cpu_to_le16(scid); |
| 3062 | rsp.dcid = cpu_to_le16(dcid); |
| 3063 | rsp.result = cpu_to_le16(result); |
| 3064 | rsp.status = cpu_to_le16(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3065 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 3066 | |
| 3067 | if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) { |
| 3068 | struct l2cap_info_req info; |
| 3069 | info.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 3070 | |
| 3071 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; |
| 3072 | conn->info_ident = l2cap_get_ident(conn); |
| 3073 | |
Marcel Holtmann | ba13ccd | 2012-03-01 14:25:33 -0800 | [diff] [blame] | 3074 | schedule_delayed_work(&conn->info_timer, L2CAP_INFO_TIMEOUT); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 3075 | |
| 3076 | l2cap_send_cmd(conn, conn->info_ident, |
| 3077 | L2CAP_INFO_REQ, sizeof(info), &info); |
| 3078 | } |
| 3079 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3080 | if (chan && !test_bit(CONF_REQ_SENT, &chan->conf_state) && |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 3081 | result == L2CAP_CR_SUCCESS) { |
| 3082 | u8 buf[128]; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3083 | set_bit(CONF_REQ_SENT, &chan->conf_state); |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 3084 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 3085 | l2cap_build_conf_req(chan, buf), buf); |
| 3086 | chan->num_conf_req++; |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 3087 | } |
| 3088 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3089 | return 0; |
| 3090 | } |
| 3091 | |
| 3092 | static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3093 | { |
| 3094 | struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; |
| 3095 | u16 scid, dcid, result, status; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3096 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3097 | u8 req[128]; |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3098 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3099 | |
| 3100 | scid = __le16_to_cpu(rsp->scid); |
| 3101 | dcid = __le16_to_cpu(rsp->dcid); |
| 3102 | result = __le16_to_cpu(rsp->result); |
| 3103 | status = __le16_to_cpu(rsp->status); |
| 3104 | |
Andrei Emeltchenko | 1b009c9 | 2012-02-21 12:54:54 +0200 | [diff] [blame] | 3105 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", |
| 3106 | dcid, scid, result, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3107 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3108 | mutex_lock(&conn->chan_lock); |
| 3109 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3110 | if (scid) { |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3111 | chan = __l2cap_get_chan_by_scid(conn, scid); |
| 3112 | if (!chan) { |
| 3113 | err = -EFAULT; |
| 3114 | goto unlock; |
| 3115 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3116 | } else { |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3117 | chan = __l2cap_get_chan_by_ident(conn, cmd->ident); |
| 3118 | if (!chan) { |
| 3119 | err = -EFAULT; |
| 3120 | goto unlock; |
| 3121 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3122 | } |
| 3123 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3124 | err = 0; |
| 3125 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3126 | l2cap_chan_lock(chan); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3127 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3128 | switch (result) { |
| 3129 | case L2CAP_CR_SUCCESS: |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 3130 | l2cap_state_change(chan, BT_CONFIG); |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 3131 | chan->ident = 0; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 3132 | chan->dcid = dcid; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3133 | clear_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Marcel Holtmann | 6a8d301 | 2009-02-06 23:56:36 +0100 | [diff] [blame] | 3134 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3135 | if (test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 3136 | break; |
| 3137 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3138 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 3139 | l2cap_build_conf_req(chan, req), req); |
| 3140 | chan->num_conf_req++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3141 | break; |
| 3142 | |
| 3143 | case L2CAP_CR_PEND: |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3144 | set_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3145 | break; |
| 3146 | |
| 3147 | default: |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3148 | l2cap_chan_del(chan, ECONNREFUSED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3149 | break; |
| 3150 | } |
| 3151 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3152 | l2cap_chan_unlock(chan); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3153 | |
| 3154 | unlock: |
| 3155 | mutex_unlock(&conn->chan_lock); |
| 3156 | |
| 3157 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3158 | } |
| 3159 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3160 | static inline void set_default_fcs(struct l2cap_chan *chan) |
Mat Martineau | 8c462b6 | 2010-08-24 15:35:42 -0700 | [diff] [blame] | 3161 | { |
| 3162 | /* FCS is enabled only in ERTM or streaming mode, if one or both |
| 3163 | * sides request it. |
| 3164 | */ |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3165 | if (chan->mode != L2CAP_MODE_ERTM && chan->mode != L2CAP_MODE_STREAMING) |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3166 | chan->fcs = L2CAP_FCS_NONE; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3167 | else if (!test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3168 | chan->fcs = L2CAP_FCS_CRC16; |
Mat Martineau | 8c462b6 | 2010-08-24 15:35:42 -0700 | [diff] [blame] | 3169 | } |
| 3170 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3171 | static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3172 | { |
| 3173 | struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; |
| 3174 | u16 dcid, flags; |
| 3175 | u8 rsp[64]; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3176 | struct l2cap_chan *chan; |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 3177 | int len, err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3178 | |
| 3179 | dcid = __le16_to_cpu(req->dcid); |
| 3180 | flags = __le16_to_cpu(req->flags); |
| 3181 | |
| 3182 | BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); |
| 3183 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 3184 | chan = l2cap_get_chan_by_scid(conn, dcid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3185 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3186 | return -ENOENT; |
| 3187 | |
David S. Miller | 033b114 | 2011-07-21 13:38:42 -0700 | [diff] [blame] | 3188 | if (chan->state != BT_CONFIG && chan->state != BT_CONNECT2) { |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 3189 | struct l2cap_cmd_rej_cid rej; |
Gustavo F. Padovan | df6bd74 | 2010-06-14 02:26:15 -0300 | [diff] [blame] | 3190 | |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 3191 | rej.reason = cpu_to_le16(L2CAP_REJ_INVALID_CID); |
| 3192 | rej.scid = cpu_to_le16(chan->scid); |
| 3193 | rej.dcid = cpu_to_le16(chan->dcid); |
| 3194 | |
Gustavo F. Padovan | df6bd74 | 2010-06-14 02:26:15 -0300 | [diff] [blame] | 3195 | l2cap_send_cmd(conn, cmd->ident, L2CAP_COMMAND_REJ, |
| 3196 | sizeof(rej), &rej); |
Marcel Holtmann | 354f60a | 2006-11-18 22:15:20 +0100 | [diff] [blame] | 3197 | goto unlock; |
Gustavo F. Padovan | df6bd74 | 2010-06-14 02:26:15 -0300 | [diff] [blame] | 3198 | } |
Marcel Holtmann | 354f60a | 2006-11-18 22:15:20 +0100 | [diff] [blame] | 3199 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3200 | /* Reject if config buffer is too small. */ |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3201 | len = cmd_len - sizeof(*req); |
Dan Rosenberg | 7ac2881 | 2011-06-24 08:38:05 -0400 | [diff] [blame] | 3202 | if (len < 0 || chan->conf_len + len > sizeof(chan->conf_req)) { |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3203 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 3204 | l2cap_build_conf_rsp(chan, rsp, |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3205 | L2CAP_CONF_REJECT, flags), rsp); |
| 3206 | goto unlock; |
| 3207 | } |
| 3208 | |
| 3209 | /* Store config. */ |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 3210 | memcpy(chan->conf_req + chan->conf_len, req->data, len); |
| 3211 | chan->conf_len += len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3212 | |
| 3213 | if (flags & 0x0001) { |
| 3214 | /* Incomplete config. Send empty response. */ |
| 3215 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 3216 | l2cap_build_conf_rsp(chan, rsp, |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3217 | L2CAP_CONF_SUCCESS, 0x0001), rsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3218 | goto unlock; |
| 3219 | } |
| 3220 | |
| 3221 | /* Complete config. */ |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 3222 | len = l2cap_parse_conf_req(chan, rsp); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3223 | if (len < 0) { |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 3224 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3225 | goto unlock; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3226 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3227 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3228 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 3229 | chan->num_conf_rsp++; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3230 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3231 | /* Reset config buffer. */ |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 3232 | chan->conf_len = 0; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3233 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3234 | if (!test_bit(CONF_OUTPUT_DONE, &chan->conf_state)) |
Marcel Holtmann | 876d948 | 2007-10-20 13:35:42 +0200 | [diff] [blame] | 3235 | goto unlock; |
| 3236 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3237 | if (test_bit(CONF_INPUT_DONE, &chan->conf_state)) { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3238 | set_default_fcs(chan); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3239 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 3240 | l2cap_state_change(chan, BT_CONNECTED); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 3241 | |
Mat Martineau | 105bdf9 | 2012-04-27 16:50:48 -0700 | [diff] [blame] | 3242 | if (chan->mode == L2CAP_MODE_ERTM || |
| 3243 | chan->mode == L2CAP_MODE_STREAMING) |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 3244 | err = l2cap_ertm_init(chan); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 3245 | |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 3246 | if (err < 0) |
| 3247 | l2cap_send_disconn_req(chan->conn, chan, -err); |
| 3248 | else |
| 3249 | l2cap_chan_ready(chan); |
| 3250 | |
Marcel Holtmann | 876d948 | 2007-10-20 13:35:42 +0200 | [diff] [blame] | 3251 | goto unlock; |
| 3252 | } |
| 3253 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3254 | if (!test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 3255 | u8 buf[64]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3256 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 3257 | l2cap_build_conf_req(chan, buf), buf); |
| 3258 | chan->num_conf_req++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3259 | } |
| 3260 | |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 3261 | /* Got Conf Rsp PENDING from remote side and asume we sent |
| 3262 | Conf Rsp PENDING in the code above */ |
| 3263 | if (test_bit(CONF_REM_CONF_PEND, &chan->conf_state) && |
| 3264 | test_bit(CONF_LOC_CONF_PEND, &chan->conf_state)) { |
| 3265 | |
| 3266 | /* check compatibility */ |
| 3267 | |
| 3268 | clear_bit(CONF_LOC_CONF_PEND, &chan->conf_state); |
| 3269 | set_bit(CONF_OUTPUT_DONE, &chan->conf_state); |
| 3270 | |
| 3271 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
Gustavo F. Padovan | 3e6b3b9 | 2011-11-01 14:06:23 -0200 | [diff] [blame] | 3272 | l2cap_build_conf_rsp(chan, rsp, |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 3273 | L2CAP_CONF_SUCCESS, 0x0000), rsp); |
| 3274 | } |
| 3275 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3276 | unlock: |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3277 | l2cap_chan_unlock(chan); |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 3278 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3279 | } |
| 3280 | |
| 3281 | static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3282 | { |
| 3283 | struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; |
| 3284 | u16 scid, flags, result; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3285 | struct l2cap_chan *chan; |
Andrei Emeltchenko | 61386cb | 2012-03-12 12:13:07 +0200 | [diff] [blame] | 3286 | int len = le16_to_cpu(cmd->len) - sizeof(*rsp); |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 3287 | int err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3288 | |
| 3289 | scid = __le16_to_cpu(rsp->scid); |
| 3290 | flags = __le16_to_cpu(rsp->flags); |
| 3291 | result = __le16_to_cpu(rsp->result); |
| 3292 | |
Andrei Emeltchenko | 61386cb | 2012-03-12 12:13:07 +0200 | [diff] [blame] | 3293 | BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x len %d", scid, flags, |
| 3294 | result, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3295 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 3296 | chan = l2cap_get_chan_by_scid(conn, scid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3297 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3298 | return 0; |
| 3299 | |
| 3300 | switch (result) { |
| 3301 | case L2CAP_CONF_SUCCESS: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3302 | l2cap_conf_rfc_get(chan, rsp->data, len); |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 3303 | clear_bit(CONF_REM_CONF_PEND, &chan->conf_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3304 | break; |
| 3305 | |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 3306 | case L2CAP_CONF_PENDING: |
| 3307 | set_bit(CONF_REM_CONF_PEND, &chan->conf_state); |
| 3308 | |
| 3309 | if (test_bit(CONF_LOC_CONF_PEND, &chan->conf_state)) { |
| 3310 | char buf[64]; |
| 3311 | |
| 3312 | len = l2cap_parse_conf_rsp(chan, rsp->data, len, |
| 3313 | buf, &result); |
| 3314 | if (len < 0) { |
| 3315 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
| 3316 | goto done; |
| 3317 | } |
| 3318 | |
| 3319 | /* check compatibility */ |
| 3320 | |
| 3321 | clear_bit(CONF_LOC_CONF_PEND, &chan->conf_state); |
| 3322 | set_bit(CONF_OUTPUT_DONE, &chan->conf_state); |
| 3323 | |
| 3324 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
Gustavo F. Padovan | 3e6b3b9 | 2011-11-01 14:06:23 -0200 | [diff] [blame] | 3325 | l2cap_build_conf_rsp(chan, buf, |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 3326 | L2CAP_CONF_SUCCESS, 0x0000), buf); |
| 3327 | } |
| 3328 | goto done; |
| 3329 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3330 | case L2CAP_CONF_UNACCEPT: |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 3331 | if (chan->num_conf_rsp <= L2CAP_CONF_MAX_CONF_RSP) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3332 | char req[64]; |
| 3333 | |
Andrei Emeltchenko | c2c77ec | 2010-03-19 10:26:28 +0200 | [diff] [blame] | 3334 | if (len > sizeof(req) - sizeof(struct l2cap_conf_req)) { |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 3335 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
Andrei Emeltchenko | c2c77ec | 2010-03-19 10:26:28 +0200 | [diff] [blame] | 3336 | goto done; |
| 3337 | } |
| 3338 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3339 | /* throw out any old stored conf requests */ |
| 3340 | result = L2CAP_CONF_SUCCESS; |
Gustavo F. Padovan | b445003 | 2011-04-12 18:15:09 -0300 | [diff] [blame] | 3341 | len = l2cap_parse_conf_rsp(chan, rsp->data, len, |
| 3342 | req, &result); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3343 | if (len < 0) { |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 3344 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3345 | goto done; |
| 3346 | } |
| 3347 | |
| 3348 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
| 3349 | L2CAP_CONF_REQ, len, req); |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 3350 | chan->num_conf_req++; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3351 | if (result != L2CAP_CONF_SUCCESS) |
| 3352 | goto done; |
| 3353 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3354 | } |
| 3355 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 3356 | default: |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3357 | l2cap_chan_set_err(chan, ECONNRESET); |
Andrei Emeltchenko | 2e0052e | 2012-02-21 12:54:58 +0200 | [diff] [blame] | 3358 | |
Marcel Holtmann | ba13ccd | 2012-03-01 14:25:33 -0800 | [diff] [blame] | 3359 | __set_chan_timer(chan, L2CAP_DISC_REJ_TIMEOUT); |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 3360 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3361 | goto done; |
| 3362 | } |
| 3363 | |
| 3364 | if (flags & 0x01) |
| 3365 | goto done; |
| 3366 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3367 | set_bit(CONF_INPUT_DONE, &chan->conf_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3368 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3369 | if (test_bit(CONF_OUTPUT_DONE, &chan->conf_state)) { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3370 | set_default_fcs(chan); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3371 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 3372 | l2cap_state_change(chan, BT_CONNECTED); |
Mat Martineau | 105bdf9 | 2012-04-27 16:50:48 -0700 | [diff] [blame] | 3373 | if (chan->mode == L2CAP_MODE_ERTM || |
| 3374 | chan->mode == L2CAP_MODE_STREAMING) |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 3375 | err = l2cap_ertm_init(chan); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 3376 | |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 3377 | if (err < 0) |
| 3378 | l2cap_send_disconn_req(chan->conn, chan, -err); |
| 3379 | else |
| 3380 | l2cap_chan_ready(chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3381 | } |
| 3382 | |
| 3383 | done: |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3384 | l2cap_chan_unlock(chan); |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 3385 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3386 | } |
| 3387 | |
| 3388 | static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3389 | { |
| 3390 | struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; |
| 3391 | struct l2cap_disconn_rsp rsp; |
| 3392 | u16 dcid, scid; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3393 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3394 | struct sock *sk; |
| 3395 | |
| 3396 | scid = __le16_to_cpu(req->scid); |
| 3397 | dcid = __le16_to_cpu(req->dcid); |
| 3398 | |
| 3399 | BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); |
| 3400 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3401 | mutex_lock(&conn->chan_lock); |
| 3402 | |
| 3403 | chan = __l2cap_get_chan_by_scid(conn, dcid); |
| 3404 | if (!chan) { |
| 3405 | mutex_unlock(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3406 | return 0; |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3407 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3408 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3409 | l2cap_chan_lock(chan); |
| 3410 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3411 | sk = chan->sk; |
| 3412 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 3413 | rsp.dcid = cpu_to_le16(chan->scid); |
| 3414 | rsp.scid = cpu_to_le16(chan->dcid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3415 | l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); |
| 3416 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3417 | lock_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3418 | sk->sk_shutdown = SHUTDOWN_MASK; |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3419 | release_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3420 | |
Mat Martineau | 61d6ef3 | 2012-04-27 16:50:50 -0700 | [diff] [blame] | 3421 | l2cap_chan_hold(chan); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3422 | l2cap_chan_del(chan, ECONNRESET); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3423 | |
| 3424 | l2cap_chan_unlock(chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3425 | |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 3426 | chan->ops->close(chan->data); |
Mat Martineau | 61d6ef3 | 2012-04-27 16:50:50 -0700 | [diff] [blame] | 3427 | l2cap_chan_put(chan); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3428 | |
| 3429 | mutex_unlock(&conn->chan_lock); |
| 3430 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3431 | return 0; |
| 3432 | } |
| 3433 | |
| 3434 | static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3435 | { |
| 3436 | struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; |
| 3437 | u16 dcid, scid; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3438 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3439 | |
| 3440 | scid = __le16_to_cpu(rsp->scid); |
| 3441 | dcid = __le16_to_cpu(rsp->dcid); |
| 3442 | |
| 3443 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); |
| 3444 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3445 | mutex_lock(&conn->chan_lock); |
| 3446 | |
| 3447 | chan = __l2cap_get_chan_by_scid(conn, scid); |
| 3448 | if (!chan) { |
| 3449 | mutex_unlock(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3450 | return 0; |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3451 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3452 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3453 | l2cap_chan_lock(chan); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3454 | |
Mat Martineau | 61d6ef3 | 2012-04-27 16:50:50 -0700 | [diff] [blame] | 3455 | l2cap_chan_hold(chan); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3456 | l2cap_chan_del(chan, 0); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3457 | |
| 3458 | l2cap_chan_unlock(chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3459 | |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 3460 | chan->ops->close(chan->data); |
Mat Martineau | 61d6ef3 | 2012-04-27 16:50:50 -0700 | [diff] [blame] | 3461 | l2cap_chan_put(chan); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3462 | |
| 3463 | mutex_unlock(&conn->chan_lock); |
| 3464 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3465 | return 0; |
| 3466 | } |
| 3467 | |
| 3468 | static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3469 | { |
| 3470 | struct l2cap_info_req *req = (struct l2cap_info_req *) data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3471 | u16 type; |
| 3472 | |
| 3473 | type = __le16_to_cpu(req->type); |
| 3474 | |
| 3475 | BT_DBG("type 0x%4.4x", type); |
| 3476 | |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 3477 | if (type == L2CAP_IT_FEAT_MASK) { |
| 3478 | u8 buf[8]; |
Marcel Holtmann | 44dd46d | 2009-05-02 19:09:01 -0700 | [diff] [blame] | 3479 | u32 feat_mask = l2cap_feat_mask; |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 3480 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
| 3481 | rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 3482 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); |
Gustavo F. Padovan | d1c4a17 | 2010-07-18 16:25:54 -0300 | [diff] [blame] | 3483 | if (!disable_ertm) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3484 | feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING |
| 3485 | | L2CAP_FEAT_FCS; |
Andrei Emeltchenko | a5fd6f3 | 2011-09-16 16:26:32 +0300 | [diff] [blame] | 3486 | if (enable_hs) |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 3487 | feat_mask |= L2CAP_FEAT_EXT_FLOW |
| 3488 | | L2CAP_FEAT_EXT_WINDOW; |
Andrei Emeltchenko | a5fd6f3 | 2011-09-16 16:26:32 +0300 | [diff] [blame] | 3489 | |
Gustavo F. Padovan | 1b7bf4e | 2009-08-24 00:45:20 -0300 | [diff] [blame] | 3490 | put_unaligned_le32(feat_mask, rsp->data); |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 3491 | l2cap_send_cmd(conn, cmd->ident, |
| 3492 | L2CAP_INFO_RSP, sizeof(buf), buf); |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 3493 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
| 3494 | u8 buf[12]; |
| 3495 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
Mat Martineau | 50a147c | 2011-11-02 16:18:34 -0700 | [diff] [blame] | 3496 | |
| 3497 | if (enable_hs) |
| 3498 | l2cap_fixed_chan[0] |= L2CAP_FC_A2MP; |
| 3499 | else |
| 3500 | l2cap_fixed_chan[0] &= ~L2CAP_FC_A2MP; |
| 3501 | |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 3502 | rsp->type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); |
| 3503 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); |
Andrei Emeltchenko | c6337ea | 2011-10-20 17:02:44 +0300 | [diff] [blame] | 3504 | memcpy(rsp->data, l2cap_fixed_chan, sizeof(l2cap_fixed_chan)); |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 3505 | l2cap_send_cmd(conn, cmd->ident, |
| 3506 | L2CAP_INFO_RSP, sizeof(buf), buf); |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 3507 | } else { |
| 3508 | struct l2cap_info_rsp rsp; |
| 3509 | rsp.type = cpu_to_le16(type); |
| 3510 | rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP); |
| 3511 | l2cap_send_cmd(conn, cmd->ident, |
| 3512 | L2CAP_INFO_RSP, sizeof(rsp), &rsp); |
| 3513 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3514 | |
| 3515 | return 0; |
| 3516 | } |
| 3517 | |
| 3518 | static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3519 | { |
| 3520 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; |
| 3521 | u16 type, result; |
| 3522 | |
| 3523 | type = __le16_to_cpu(rsp->type); |
| 3524 | result = __le16_to_cpu(rsp->result); |
| 3525 | |
| 3526 | BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); |
| 3527 | |
Andrei Emeltchenko | e90165b | 2011-03-25 11:31:41 +0200 | [diff] [blame] | 3528 | /* L2CAP Info req/rsp are unbound to channels, add extra checks */ |
| 3529 | if (cmd->ident != conn->info_ident || |
| 3530 | conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) |
| 3531 | return 0; |
| 3532 | |
Ulisses Furquim | 17cd3f3 | 2012-01-30 18:26:28 -0200 | [diff] [blame] | 3533 | cancel_delayed_work(&conn->info_timer); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 3534 | |
Ville Tervo | adb08ed | 2010-08-04 09:43:33 +0300 | [diff] [blame] | 3535 | if (result != L2CAP_IR_SUCCESS) { |
| 3536 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
| 3537 | conn->info_ident = 0; |
| 3538 | |
| 3539 | l2cap_conn_start(conn); |
| 3540 | |
| 3541 | return 0; |
| 3542 | } |
| 3543 | |
Andrei Emeltchenko | 978c93b | 2012-02-29 10:41:41 +0200 | [diff] [blame] | 3544 | switch (type) { |
| 3545 | case L2CAP_IT_FEAT_MASK: |
Harvey Harrison | 8398531 | 2008-05-02 16:25:46 -0700 | [diff] [blame] | 3546 | conn->feat_mask = get_unaligned_le32(rsp->data); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 3547 | |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 3548 | if (conn->feat_mask & L2CAP_FEAT_FIXED_CHAN) { |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 3549 | struct l2cap_info_req req; |
| 3550 | req.type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); |
| 3551 | |
| 3552 | conn->info_ident = l2cap_get_ident(conn); |
| 3553 | |
| 3554 | l2cap_send_cmd(conn, conn->info_ident, |
| 3555 | L2CAP_INFO_REQ, sizeof(req), &req); |
| 3556 | } else { |
| 3557 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
| 3558 | conn->info_ident = 0; |
| 3559 | |
| 3560 | l2cap_conn_start(conn); |
| 3561 | } |
Andrei Emeltchenko | 978c93b | 2012-02-29 10:41:41 +0200 | [diff] [blame] | 3562 | break; |
| 3563 | |
| 3564 | case L2CAP_IT_FIXED_CHAN: |
| 3565 | conn->fixed_chan_mask = rsp->data[0]; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 3566 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 3567 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 3568 | |
| 3569 | l2cap_conn_start(conn); |
Andrei Emeltchenko | 978c93b | 2012-02-29 10:41:41 +0200 | [diff] [blame] | 3570 | break; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 3571 | } |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 3572 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3573 | return 0; |
| 3574 | } |
| 3575 | |
Mat Martineau | f94ff6f | 2011-11-02 16:18:32 -0700 | [diff] [blame] | 3576 | static inline int l2cap_create_channel_req(struct l2cap_conn *conn, |
| 3577 | struct l2cap_cmd_hdr *cmd, u16 cmd_len, |
| 3578 | void *data) |
| 3579 | { |
| 3580 | struct l2cap_create_chan_req *req = data; |
| 3581 | struct l2cap_create_chan_rsp rsp; |
| 3582 | u16 psm, scid; |
| 3583 | |
| 3584 | if (cmd_len != sizeof(*req)) |
| 3585 | return -EPROTO; |
| 3586 | |
| 3587 | if (!enable_hs) |
| 3588 | return -EINVAL; |
| 3589 | |
| 3590 | psm = le16_to_cpu(req->psm); |
| 3591 | scid = le16_to_cpu(req->scid); |
| 3592 | |
| 3593 | BT_DBG("psm %d, scid %d, amp_id %d", psm, scid, req->amp_id); |
| 3594 | |
| 3595 | /* Placeholder: Always reject */ |
| 3596 | rsp.dcid = 0; |
| 3597 | rsp.scid = cpu_to_le16(scid); |
Andrei Emeltchenko | 8ce0c49 | 2012-03-12 12:13:09 +0200 | [diff] [blame] | 3598 | rsp.result = __constant_cpu_to_le16(L2CAP_CR_NO_MEM); |
| 3599 | rsp.status = __constant_cpu_to_le16(L2CAP_CS_NO_INFO); |
Mat Martineau | f94ff6f | 2011-11-02 16:18:32 -0700 | [diff] [blame] | 3600 | |
| 3601 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CREATE_CHAN_RSP, |
| 3602 | sizeof(rsp), &rsp); |
| 3603 | |
| 3604 | return 0; |
| 3605 | } |
| 3606 | |
| 3607 | static inline int l2cap_create_channel_rsp(struct l2cap_conn *conn, |
| 3608 | struct l2cap_cmd_hdr *cmd, void *data) |
| 3609 | { |
| 3610 | BT_DBG("conn %p", conn); |
| 3611 | |
| 3612 | return l2cap_connect_rsp(conn, cmd, data); |
| 3613 | } |
| 3614 | |
Mat Martineau | 8d5a04a | 2011-11-02 16:18:35 -0700 | [diff] [blame] | 3615 | static void l2cap_send_move_chan_rsp(struct l2cap_conn *conn, u8 ident, |
| 3616 | u16 icid, u16 result) |
| 3617 | { |
| 3618 | struct l2cap_move_chan_rsp rsp; |
| 3619 | |
| 3620 | BT_DBG("icid %d, result %d", icid, result); |
| 3621 | |
| 3622 | rsp.icid = cpu_to_le16(icid); |
| 3623 | rsp.result = cpu_to_le16(result); |
| 3624 | |
| 3625 | l2cap_send_cmd(conn, ident, L2CAP_MOVE_CHAN_RSP, sizeof(rsp), &rsp); |
| 3626 | } |
| 3627 | |
| 3628 | static void l2cap_send_move_chan_cfm(struct l2cap_conn *conn, |
| 3629 | struct l2cap_chan *chan, u16 icid, u16 result) |
| 3630 | { |
| 3631 | struct l2cap_move_chan_cfm cfm; |
| 3632 | u8 ident; |
| 3633 | |
| 3634 | BT_DBG("icid %d, result %d", icid, result); |
| 3635 | |
| 3636 | ident = l2cap_get_ident(conn); |
| 3637 | if (chan) |
| 3638 | chan->ident = ident; |
| 3639 | |
| 3640 | cfm.icid = cpu_to_le16(icid); |
| 3641 | cfm.result = cpu_to_le16(result); |
| 3642 | |
| 3643 | l2cap_send_cmd(conn, ident, L2CAP_MOVE_CHAN_CFM, sizeof(cfm), &cfm); |
| 3644 | } |
| 3645 | |
| 3646 | static void l2cap_send_move_chan_cfm_rsp(struct l2cap_conn *conn, u8 ident, |
| 3647 | u16 icid) |
| 3648 | { |
| 3649 | struct l2cap_move_chan_cfm_rsp rsp; |
| 3650 | |
| 3651 | BT_DBG("icid %d", icid); |
| 3652 | |
| 3653 | rsp.icid = cpu_to_le16(icid); |
| 3654 | l2cap_send_cmd(conn, ident, L2CAP_MOVE_CHAN_CFM_RSP, sizeof(rsp), &rsp); |
| 3655 | } |
| 3656 | |
| 3657 | static inline int l2cap_move_channel_req(struct l2cap_conn *conn, |
| 3658 | struct l2cap_cmd_hdr *cmd, u16 cmd_len, void *data) |
| 3659 | { |
| 3660 | struct l2cap_move_chan_req *req = data; |
| 3661 | u16 icid = 0; |
| 3662 | u16 result = L2CAP_MR_NOT_ALLOWED; |
| 3663 | |
| 3664 | if (cmd_len != sizeof(*req)) |
| 3665 | return -EPROTO; |
| 3666 | |
| 3667 | icid = le16_to_cpu(req->icid); |
| 3668 | |
| 3669 | BT_DBG("icid %d, dest_amp_id %d", icid, req->dest_amp_id); |
| 3670 | |
| 3671 | if (!enable_hs) |
| 3672 | return -EINVAL; |
| 3673 | |
| 3674 | /* Placeholder: Always refuse */ |
| 3675 | l2cap_send_move_chan_rsp(conn, cmd->ident, icid, result); |
| 3676 | |
| 3677 | return 0; |
| 3678 | } |
| 3679 | |
| 3680 | static inline int l2cap_move_channel_rsp(struct l2cap_conn *conn, |
| 3681 | struct l2cap_cmd_hdr *cmd, u16 cmd_len, void *data) |
| 3682 | { |
| 3683 | struct l2cap_move_chan_rsp *rsp = data; |
| 3684 | u16 icid, result; |
| 3685 | |
| 3686 | if (cmd_len != sizeof(*rsp)) |
| 3687 | return -EPROTO; |
| 3688 | |
| 3689 | icid = le16_to_cpu(rsp->icid); |
| 3690 | result = le16_to_cpu(rsp->result); |
| 3691 | |
| 3692 | BT_DBG("icid %d, result %d", icid, result); |
| 3693 | |
| 3694 | /* Placeholder: Always unconfirmed */ |
| 3695 | l2cap_send_move_chan_cfm(conn, NULL, icid, L2CAP_MC_UNCONFIRMED); |
| 3696 | |
| 3697 | return 0; |
| 3698 | } |
| 3699 | |
| 3700 | static inline int l2cap_move_channel_confirm(struct l2cap_conn *conn, |
| 3701 | struct l2cap_cmd_hdr *cmd, u16 cmd_len, void *data) |
| 3702 | { |
| 3703 | struct l2cap_move_chan_cfm *cfm = data; |
| 3704 | u16 icid, result; |
| 3705 | |
| 3706 | if (cmd_len != sizeof(*cfm)) |
| 3707 | return -EPROTO; |
| 3708 | |
| 3709 | icid = le16_to_cpu(cfm->icid); |
| 3710 | result = le16_to_cpu(cfm->result); |
| 3711 | |
| 3712 | BT_DBG("icid %d, result %d", icid, result); |
| 3713 | |
| 3714 | l2cap_send_move_chan_cfm_rsp(conn, cmd->ident, icid); |
| 3715 | |
| 3716 | return 0; |
| 3717 | } |
| 3718 | |
| 3719 | static inline int l2cap_move_channel_confirm_rsp(struct l2cap_conn *conn, |
| 3720 | struct l2cap_cmd_hdr *cmd, u16 cmd_len, void *data) |
| 3721 | { |
| 3722 | struct l2cap_move_chan_cfm_rsp *rsp = data; |
| 3723 | u16 icid; |
| 3724 | |
| 3725 | if (cmd_len != sizeof(*rsp)) |
| 3726 | return -EPROTO; |
| 3727 | |
| 3728 | icid = le16_to_cpu(rsp->icid); |
| 3729 | |
| 3730 | BT_DBG("icid %d", icid); |
| 3731 | |
| 3732 | return 0; |
| 3733 | } |
| 3734 | |
Gustavo F. Padovan | e2174ca | 2011-02-17 19:16:55 -0300 | [diff] [blame] | 3735 | static inline int l2cap_check_conn_param(u16 min, u16 max, u16 latency, |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 3736 | u16 to_multiplier) |
| 3737 | { |
| 3738 | u16 max_latency; |
| 3739 | |
| 3740 | if (min > max || min < 6 || max > 3200) |
| 3741 | return -EINVAL; |
| 3742 | |
| 3743 | if (to_multiplier < 10 || to_multiplier > 3200) |
| 3744 | return -EINVAL; |
| 3745 | |
| 3746 | if (max >= to_multiplier * 8) |
| 3747 | return -EINVAL; |
| 3748 | |
| 3749 | max_latency = (to_multiplier * 8 / max) - 1; |
| 3750 | if (latency > 499 || latency > max_latency) |
| 3751 | return -EINVAL; |
| 3752 | |
| 3753 | return 0; |
| 3754 | } |
| 3755 | |
| 3756 | static inline int l2cap_conn_param_update_req(struct l2cap_conn *conn, |
| 3757 | struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3758 | { |
| 3759 | struct hci_conn *hcon = conn->hcon; |
| 3760 | struct l2cap_conn_param_update_req *req; |
| 3761 | struct l2cap_conn_param_update_rsp rsp; |
| 3762 | u16 min, max, latency, to_multiplier, cmd_len; |
Claudio Takahasi | 2ce603e | 2011-02-16 20:44:53 -0200 | [diff] [blame] | 3763 | int err; |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 3764 | |
| 3765 | if (!(hcon->link_mode & HCI_LM_MASTER)) |
| 3766 | return -EINVAL; |
| 3767 | |
| 3768 | cmd_len = __le16_to_cpu(cmd->len); |
| 3769 | if (cmd_len != sizeof(struct l2cap_conn_param_update_req)) |
| 3770 | return -EPROTO; |
| 3771 | |
| 3772 | req = (struct l2cap_conn_param_update_req *) data; |
Gustavo F. Padovan | e2174ca | 2011-02-17 19:16:55 -0300 | [diff] [blame] | 3773 | min = __le16_to_cpu(req->min); |
| 3774 | max = __le16_to_cpu(req->max); |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 3775 | latency = __le16_to_cpu(req->latency); |
| 3776 | to_multiplier = __le16_to_cpu(req->to_multiplier); |
| 3777 | |
| 3778 | BT_DBG("min 0x%4.4x max 0x%4.4x latency: 0x%4.4x Timeout: 0x%4.4x", |
| 3779 | min, max, latency, to_multiplier); |
| 3780 | |
| 3781 | memset(&rsp, 0, sizeof(rsp)); |
Claudio Takahasi | 2ce603e | 2011-02-16 20:44:53 -0200 | [diff] [blame] | 3782 | |
| 3783 | err = l2cap_check_conn_param(min, max, latency, to_multiplier); |
| 3784 | if (err) |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 3785 | rsp.result = cpu_to_le16(L2CAP_CONN_PARAM_REJECTED); |
| 3786 | else |
| 3787 | rsp.result = cpu_to_le16(L2CAP_CONN_PARAM_ACCEPTED); |
| 3788 | |
| 3789 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_PARAM_UPDATE_RSP, |
| 3790 | sizeof(rsp), &rsp); |
| 3791 | |
Claudio Takahasi | 2ce603e | 2011-02-16 20:44:53 -0200 | [diff] [blame] | 3792 | if (!err) |
| 3793 | hci_le_conn_update(hcon, min, max, latency, to_multiplier); |
| 3794 | |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 3795 | return 0; |
| 3796 | } |
| 3797 | |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 3798 | static inline int l2cap_bredr_sig_cmd(struct l2cap_conn *conn, |
| 3799 | struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data) |
| 3800 | { |
| 3801 | int err = 0; |
| 3802 | |
| 3803 | switch (cmd->code) { |
| 3804 | case L2CAP_COMMAND_REJ: |
| 3805 | l2cap_command_rej(conn, cmd, data); |
| 3806 | break; |
| 3807 | |
| 3808 | case L2CAP_CONN_REQ: |
| 3809 | err = l2cap_connect_req(conn, cmd, data); |
| 3810 | break; |
| 3811 | |
| 3812 | case L2CAP_CONN_RSP: |
| 3813 | err = l2cap_connect_rsp(conn, cmd, data); |
| 3814 | break; |
| 3815 | |
| 3816 | case L2CAP_CONF_REQ: |
| 3817 | err = l2cap_config_req(conn, cmd, cmd_len, data); |
| 3818 | break; |
| 3819 | |
| 3820 | case L2CAP_CONF_RSP: |
| 3821 | err = l2cap_config_rsp(conn, cmd, data); |
| 3822 | break; |
| 3823 | |
| 3824 | case L2CAP_DISCONN_REQ: |
| 3825 | err = l2cap_disconnect_req(conn, cmd, data); |
| 3826 | break; |
| 3827 | |
| 3828 | case L2CAP_DISCONN_RSP: |
| 3829 | err = l2cap_disconnect_rsp(conn, cmd, data); |
| 3830 | break; |
| 3831 | |
| 3832 | case L2CAP_ECHO_REQ: |
| 3833 | l2cap_send_cmd(conn, cmd->ident, L2CAP_ECHO_RSP, cmd_len, data); |
| 3834 | break; |
| 3835 | |
| 3836 | case L2CAP_ECHO_RSP: |
| 3837 | break; |
| 3838 | |
| 3839 | case L2CAP_INFO_REQ: |
| 3840 | err = l2cap_information_req(conn, cmd, data); |
| 3841 | break; |
| 3842 | |
| 3843 | case L2CAP_INFO_RSP: |
| 3844 | err = l2cap_information_rsp(conn, cmd, data); |
| 3845 | break; |
| 3846 | |
Mat Martineau | f94ff6f | 2011-11-02 16:18:32 -0700 | [diff] [blame] | 3847 | case L2CAP_CREATE_CHAN_REQ: |
| 3848 | err = l2cap_create_channel_req(conn, cmd, cmd_len, data); |
| 3849 | break; |
| 3850 | |
| 3851 | case L2CAP_CREATE_CHAN_RSP: |
| 3852 | err = l2cap_create_channel_rsp(conn, cmd, data); |
| 3853 | break; |
| 3854 | |
Mat Martineau | 8d5a04a | 2011-11-02 16:18:35 -0700 | [diff] [blame] | 3855 | case L2CAP_MOVE_CHAN_REQ: |
| 3856 | err = l2cap_move_channel_req(conn, cmd, cmd_len, data); |
| 3857 | break; |
| 3858 | |
| 3859 | case L2CAP_MOVE_CHAN_RSP: |
| 3860 | err = l2cap_move_channel_rsp(conn, cmd, cmd_len, data); |
| 3861 | break; |
| 3862 | |
| 3863 | case L2CAP_MOVE_CHAN_CFM: |
| 3864 | err = l2cap_move_channel_confirm(conn, cmd, cmd_len, data); |
| 3865 | break; |
| 3866 | |
| 3867 | case L2CAP_MOVE_CHAN_CFM_RSP: |
| 3868 | err = l2cap_move_channel_confirm_rsp(conn, cmd, cmd_len, data); |
| 3869 | break; |
| 3870 | |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 3871 | default: |
| 3872 | BT_ERR("Unknown BR/EDR signaling command 0x%2.2x", cmd->code); |
| 3873 | err = -EINVAL; |
| 3874 | break; |
| 3875 | } |
| 3876 | |
| 3877 | return err; |
| 3878 | } |
| 3879 | |
| 3880 | static inline int l2cap_le_sig_cmd(struct l2cap_conn *conn, |
| 3881 | struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3882 | { |
| 3883 | switch (cmd->code) { |
| 3884 | case L2CAP_COMMAND_REJ: |
| 3885 | return 0; |
| 3886 | |
| 3887 | case L2CAP_CONN_PARAM_UPDATE_REQ: |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 3888 | return l2cap_conn_param_update_req(conn, cmd, data); |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 3889 | |
| 3890 | case L2CAP_CONN_PARAM_UPDATE_RSP: |
| 3891 | return 0; |
| 3892 | |
| 3893 | default: |
| 3894 | BT_ERR("Unknown LE signaling command 0x%2.2x", cmd->code); |
| 3895 | return -EINVAL; |
| 3896 | } |
| 3897 | } |
| 3898 | |
| 3899 | static inline void l2cap_sig_channel(struct l2cap_conn *conn, |
| 3900 | struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3901 | { |
| 3902 | u8 *data = skb->data; |
| 3903 | int len = skb->len; |
| 3904 | struct l2cap_cmd_hdr cmd; |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 3905 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3906 | |
| 3907 | l2cap_raw_recv(conn, skb); |
| 3908 | |
| 3909 | while (len >= L2CAP_CMD_HDR_SIZE) { |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3910 | u16 cmd_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3911 | memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); |
| 3912 | data += L2CAP_CMD_HDR_SIZE; |
| 3913 | len -= L2CAP_CMD_HDR_SIZE; |
| 3914 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3915 | cmd_len = le16_to_cpu(cmd.len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3916 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3917 | BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd.code, cmd_len, cmd.ident); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3918 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3919 | if (cmd_len > len || !cmd.ident) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3920 | BT_DBG("corrupted command"); |
| 3921 | break; |
| 3922 | } |
| 3923 | |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 3924 | if (conn->hcon->type == LE_LINK) |
| 3925 | err = l2cap_le_sig_cmd(conn, &cmd, data); |
| 3926 | else |
| 3927 | err = l2cap_bredr_sig_cmd(conn, &cmd, cmd_len, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3928 | |
| 3929 | if (err) { |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 3930 | struct l2cap_cmd_rej_unk rej; |
Gustavo F. Padovan | 2c6d1a2 | 2011-03-23 14:38:32 -0300 | [diff] [blame] | 3931 | |
| 3932 | BT_ERR("Wrong link type (%d)", err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3933 | |
| 3934 | /* FIXME: Map err to a valid reason */ |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 3935 | rej.reason = cpu_to_le16(L2CAP_REJ_NOT_UNDERSTOOD); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3936 | l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); |
| 3937 | } |
| 3938 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3939 | data += cmd_len; |
| 3940 | len -= cmd_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3941 | } |
| 3942 | |
| 3943 | kfree_skb(skb); |
| 3944 | } |
| 3945 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3946 | static int l2cap_check_fcs(struct l2cap_chan *chan, struct sk_buff *skb) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3947 | { |
| 3948 | u16 our_fcs, rcv_fcs; |
Andrei Emeltchenko | e4ca6d9 | 2011-10-11 13:37:52 +0300 | [diff] [blame] | 3949 | int hdr_size; |
| 3950 | |
| 3951 | if (test_bit(FLAG_EXT_CTRL, &chan->flags)) |
| 3952 | hdr_size = L2CAP_EXT_HDR_SIZE; |
| 3953 | else |
| 3954 | hdr_size = L2CAP_ENH_HDR_SIZE; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3955 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3956 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 3957 | skb_trim(skb, skb->len - L2CAP_FCS_SIZE); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3958 | rcv_fcs = get_unaligned_le16(skb->data + skb->len); |
| 3959 | our_fcs = crc16(0, skb->data - hdr_size, skb->len + hdr_size); |
| 3960 | |
| 3961 | if (our_fcs != rcv_fcs) |
João Paulo Rechi Vita | 7a560e5 | 2010-06-22 13:56:27 -0300 | [diff] [blame] | 3962 | return -EBADMSG; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3963 | } |
| 3964 | return 0; |
| 3965 | } |
| 3966 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3967 | static inline void l2cap_send_i_or_rr_or_rnr(struct l2cap_chan *chan) |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3968 | { |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 3969 | u32 control = 0; |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3970 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3971 | chan->frames_sent = 0; |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3972 | |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 3973 | control |= __set_reqseq(chan, chan->buffer_seq); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3974 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3975 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 3976 | control |= __set_ctrl_super(chan, L2CAP_SUPER_RNR); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3977 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3978 | set_bit(CONN_RNR_SENT, &chan->conn_state); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3979 | } |
| 3980 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3981 | if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3982 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3983 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3984 | l2cap_ertm_send(chan); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3985 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3986 | if (!test_bit(CONN_LOCAL_BUSY, &chan->conn_state) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3987 | chan->frames_sent == 0) { |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 3988 | control |= __set_ctrl_super(chan, L2CAP_SUPER_RR); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3989 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3990 | } |
| 3991 | } |
| 3992 | |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 3993 | static int l2cap_add_to_srej_queue(struct l2cap_chan *chan, struct sk_buff *skb, u16 tx_seq, u8 sar) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3994 | { |
| 3995 | struct sk_buff *next_skb; |
João Paulo Rechi Vita | bfbacc1 | 2010-05-31 18:35:44 -0300 | [diff] [blame] | 3996 | int tx_seq_offset, next_tx_seq_offset; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3997 | |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 3998 | bt_cb(skb)->control.txseq = tx_seq; |
| 3999 | bt_cb(skb)->control.sar = sar; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4000 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 4001 | next_skb = skb_peek(&chan->srej_q); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4002 | |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 4003 | tx_seq_offset = __seq_offset(chan, tx_seq, chan->buffer_seq); |
João Paulo Rechi Vita | bfbacc1 | 2010-05-31 18:35:44 -0300 | [diff] [blame] | 4004 | |
Szymon Janc | 039d957 | 2011-11-16 09:32:19 +0100 | [diff] [blame] | 4005 | while (next_skb) { |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 4006 | if (bt_cb(next_skb)->control.txseq == tx_seq) |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4007 | return -EINVAL; |
| 4008 | |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 4009 | next_tx_seq_offset = __seq_offset(chan, |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 4010 | bt_cb(next_skb)->control.txseq, chan->buffer_seq); |
João Paulo Rechi Vita | bfbacc1 | 2010-05-31 18:35:44 -0300 | [diff] [blame] | 4011 | |
| 4012 | if (next_tx_seq_offset > tx_seq_offset) { |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 4013 | __skb_queue_before(&chan->srej_q, next_skb, skb); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4014 | return 0; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4015 | } |
| 4016 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 4017 | if (skb_queue_is_last(&chan->srej_q, next_skb)) |
Szymon Janc | 039d957 | 2011-11-16 09:32:19 +0100 | [diff] [blame] | 4018 | next_skb = NULL; |
| 4019 | else |
| 4020 | next_skb = skb_queue_next(&chan->srej_q, next_skb); |
| 4021 | } |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4022 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 4023 | __skb_queue_tail(&chan->srej_q, skb); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4024 | |
| 4025 | return 0; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4026 | } |
| 4027 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4028 | static void append_skb_frag(struct sk_buff *skb, |
| 4029 | struct sk_buff *new_frag, struct sk_buff **last_frag) |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4030 | { |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4031 | /* skb->len reflects data in skb as well as all fragments |
| 4032 | * skb->data_len reflects only data in fragments |
| 4033 | */ |
| 4034 | if (!skb_has_frag_list(skb)) |
| 4035 | skb_shinfo(skb)->frag_list = new_frag; |
| 4036 | |
| 4037 | new_frag->next = NULL; |
| 4038 | |
| 4039 | (*last_frag)->next = new_frag; |
| 4040 | *last_frag = new_frag; |
| 4041 | |
| 4042 | skb->len += new_frag->len; |
| 4043 | skb->data_len += new_frag->len; |
| 4044 | skb->truesize += new_frag->truesize; |
| 4045 | } |
| 4046 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4047 | static int l2cap_reassemble_sdu(struct l2cap_chan *chan, struct sk_buff *skb, u32 control) |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4048 | { |
| 4049 | int err = -EINVAL; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4050 | |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 4051 | switch (__get_ctrl_sar(chan, control)) { |
| 4052 | case L2CAP_SAR_UNSEGMENTED: |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4053 | if (chan->sdu) |
| 4054 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4055 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4056 | err = chan->ops->recv(chan->data, skb); |
| 4057 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4058 | |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 4059 | case L2CAP_SAR_START: |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4060 | if (chan->sdu) |
| 4061 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4062 | |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 4063 | chan->sdu_len = get_unaligned_le16(skb->data); |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 4064 | skb_pull(skb, L2CAP_SDULEN_SIZE); |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4065 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4066 | if (chan->sdu_len > chan->imtu) { |
| 4067 | err = -EMSGSIZE; |
| 4068 | break; |
| 4069 | } |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4070 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4071 | if (skb->len >= chan->sdu_len) |
| 4072 | break; |
| 4073 | |
| 4074 | chan->sdu = skb; |
| 4075 | chan->sdu_last_frag = skb; |
| 4076 | |
| 4077 | skb = NULL; |
| 4078 | err = 0; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4079 | break; |
| 4080 | |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 4081 | case L2CAP_SAR_CONTINUE: |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 4082 | if (!chan->sdu) |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4083 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4084 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4085 | append_skb_frag(chan->sdu, skb, |
| 4086 | &chan->sdu_last_frag); |
| 4087 | skb = NULL; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4088 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4089 | if (chan->sdu->len >= chan->sdu_len) |
| 4090 | break; |
Gustavo F. Padovan | 4178ba4 | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 4091 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4092 | err = 0; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4093 | break; |
| 4094 | |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 4095 | case L2CAP_SAR_END: |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 4096 | if (!chan->sdu) |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4097 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4098 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4099 | append_skb_frag(chan->sdu, skb, |
| 4100 | &chan->sdu_last_frag); |
| 4101 | skb = NULL; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4102 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4103 | if (chan->sdu->len != chan->sdu_len) |
| 4104 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4105 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4106 | err = chan->ops->recv(chan->data, chan->sdu); |
Gustavo F. Padovan | 4178ba4 | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 4107 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4108 | if (!err) { |
| 4109 | /* Reassembly complete */ |
| 4110 | chan->sdu = NULL; |
| 4111 | chan->sdu_last_frag = NULL; |
| 4112 | chan->sdu_len = 0; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4113 | } |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4114 | break; |
| 4115 | } |
| 4116 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4117 | if (err) { |
| 4118 | kfree_skb(skb); |
| 4119 | kfree_skb(chan->sdu); |
| 4120 | chan->sdu = NULL; |
| 4121 | chan->sdu_last_frag = NULL; |
| 4122 | chan->sdu_len = 0; |
| 4123 | } |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4124 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4125 | return err; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4126 | } |
| 4127 | |
Mat Martineau | 26f880d | 2011-07-07 09:39:01 -0700 | [diff] [blame] | 4128 | static void l2cap_ertm_enter_local_busy(struct l2cap_chan *chan) |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4129 | { |
Mat Martineau | 26f880d | 2011-07-07 09:39:01 -0700 | [diff] [blame] | 4130 | BT_DBG("chan %p, Enter local busy", chan); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4131 | |
Mat Martineau | 26f880d | 2011-07-07 09:39:01 -0700 | [diff] [blame] | 4132 | set_bit(CONN_LOCAL_BUSY, &chan->conn_state); |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 4133 | l2cap_seq_list_clear(&chan->srej_list); |
Mat Martineau | 26f880d | 2011-07-07 09:39:01 -0700 | [diff] [blame] | 4134 | |
Szymon Janc | 77f918b | 2012-01-11 10:59:48 +0100 | [diff] [blame] | 4135 | __set_ack_timer(chan); |
Mat Martineau | 26f880d | 2011-07-07 09:39:01 -0700 | [diff] [blame] | 4136 | } |
| 4137 | |
| 4138 | static void l2cap_ertm_exit_local_busy(struct l2cap_chan *chan) |
| 4139 | { |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4140 | u32 control; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4141 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4142 | if (!test_bit(CONN_RNR_SENT, &chan->conn_state)) |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4143 | goto done; |
| 4144 | |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 4145 | control = __set_reqseq(chan, chan->buffer_seq); |
Andrei Emeltchenko | e378173 | 2011-10-11 13:37:50 +0300 | [diff] [blame] | 4146 | control |= __set_ctrl_poll(chan); |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 4147 | control |= __set_ctrl_super(chan, L2CAP_SUPER_RR); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4148 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 4149 | chan->retry_count = 1; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4150 | |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 4151 | __clear_retrans_timer(chan); |
| 4152 | __set_monitor_timer(chan); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4153 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4154 | set_bit(CONN_WAIT_F, &chan->conn_state); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4155 | |
| 4156 | done: |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4157 | clear_bit(CONN_LOCAL_BUSY, &chan->conn_state); |
| 4158 | clear_bit(CONN_RNR_SENT, &chan->conn_state); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4159 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 4160 | BT_DBG("chan %p, Exit local busy", chan); |
Gustavo F. Padovan | 712132e | 2010-06-21 19:39:50 -0300 | [diff] [blame] | 4161 | } |
| 4162 | |
Mat Martineau | e328140 | 2011-07-07 09:39:02 -0700 | [diff] [blame] | 4163 | void l2cap_chan_busy(struct l2cap_chan *chan, int busy) |
Gustavo F. Padovan | 712132e | 2010-06-21 19:39:50 -0300 | [diff] [blame] | 4164 | { |
Mat Martineau | e328140 | 2011-07-07 09:39:02 -0700 | [diff] [blame] | 4165 | if (chan->mode == L2CAP_MODE_ERTM) { |
| 4166 | if (busy) |
| 4167 | l2cap_ertm_enter_local_busy(chan); |
| 4168 | else |
| 4169 | l2cap_ertm_exit_local_busy(chan); |
Gustavo F. Padovan | 712132e | 2010-06-21 19:39:50 -0300 | [diff] [blame] | 4170 | } |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4171 | } |
| 4172 | |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 4173 | static void l2cap_check_srej_gap(struct l2cap_chan *chan, u16 tx_seq) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4174 | { |
| 4175 | struct sk_buff *skb; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4176 | u32 control; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4177 | |
Mat Martineau | e328140 | 2011-07-07 09:39:02 -0700 | [diff] [blame] | 4178 | while ((skb = skb_peek(&chan->srej_q)) && |
| 4179 | !test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
| 4180 | int err; |
| 4181 | |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 4182 | if (bt_cb(skb)->control.txseq != tx_seq) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4183 | break; |
| 4184 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 4185 | skb = skb_dequeue(&chan->srej_q); |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 4186 | control = __set_ctrl_sar(chan, bt_cb(skb)->control.sar); |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4187 | err = l2cap_reassemble_sdu(chan, skb, control); |
Mat Martineau | e328140 | 2011-07-07 09:39:02 -0700 | [diff] [blame] | 4188 | |
| 4189 | if (err < 0) { |
| 4190 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
| 4191 | break; |
| 4192 | } |
| 4193 | |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 4194 | chan->buffer_seq_srej = __next_seq(chan, chan->buffer_seq_srej); |
| 4195 | tx_seq = __next_seq(chan, tx_seq); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4196 | } |
| 4197 | } |
| 4198 | |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 4199 | static void l2cap_resend_srejframe(struct l2cap_chan *chan, u16 tx_seq) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4200 | { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4201 | struct srej_list *l, *tmp; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4202 | u32 control; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4203 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 4204 | list_for_each_entry_safe(l, tmp, &chan->srej_l, list) { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4205 | if (l->tx_seq == tx_seq) { |
| 4206 | list_del(&l->list); |
| 4207 | kfree(l); |
| 4208 | return; |
| 4209 | } |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 4210 | control = __set_ctrl_super(chan, L2CAP_SUPER_SREJ); |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 4211 | control |= __set_reqseq(chan, l->tx_seq); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4212 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4213 | list_del(&l->list); |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 4214 | list_add_tail(&l->list, &chan->srej_l); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4215 | } |
| 4216 | } |
| 4217 | |
Szymon Janc | aef89f2 | 2011-11-16 09:32:18 +0100 | [diff] [blame] | 4218 | static int l2cap_send_srejframe(struct l2cap_chan *chan, u16 tx_seq) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4219 | { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4220 | struct srej_list *new; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4221 | u32 control; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4222 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 4223 | while (tx_seq != chan->expected_tx_seq) { |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 4224 | control = __set_ctrl_super(chan, L2CAP_SUPER_SREJ); |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 4225 | control |= __set_reqseq(chan, chan->expected_tx_seq); |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 4226 | l2cap_seq_list_append(&chan->srej_list, chan->expected_tx_seq); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4227 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4228 | |
| 4229 | new = kzalloc(sizeof(struct srej_list), GFP_ATOMIC); |
Szymon Janc | aef89f2 | 2011-11-16 09:32:18 +0100 | [diff] [blame] | 4230 | if (!new) |
| 4231 | return -ENOMEM; |
| 4232 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 4233 | new->tx_seq = chan->expected_tx_seq; |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 4234 | |
| 4235 | chan->expected_tx_seq = __next_seq(chan, chan->expected_tx_seq); |
| 4236 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 4237 | list_add_tail(&new->list, &chan->srej_l); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4238 | } |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 4239 | |
| 4240 | chan->expected_tx_seq = __next_seq(chan, chan->expected_tx_seq); |
Szymon Janc | aef89f2 | 2011-11-16 09:32:18 +0100 | [diff] [blame] | 4241 | |
| 4242 | return 0; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4243 | } |
| 4244 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4245 | static inline int l2cap_data_channel_iframe(struct l2cap_chan *chan, u32 rx_control, struct sk_buff *skb) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4246 | { |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 4247 | u16 tx_seq = __get_txseq(chan, rx_control); |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 4248 | u16 req_seq = __get_reqseq(chan, rx_control); |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 4249 | u8 sar = __get_ctrl_sar(chan, rx_control); |
Gustavo F. Padovan | f6337c7 | 2010-05-10 18:32:04 -0300 | [diff] [blame] | 4250 | int tx_seq_offset, expected_tx_seq_offset; |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 4251 | int num_to_ack = (chan->tx_win/6) + 1; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4252 | int err = 0; |
| 4253 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4254 | BT_DBG("chan %p len %d tx_seq %d rx_control 0x%8.8x", chan, skb->len, |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4255 | tx_seq, rx_control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4256 | |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 4257 | if (__is_ctrl_final(chan, rx_control) && |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4258 | test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 4259 | __clear_monitor_timer(chan); |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 4260 | if (chan->unacked_frames > 0) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 4261 | __set_retrans_timer(chan); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4262 | clear_bit(CONN_WAIT_F, &chan->conn_state); |
Gustavo F. Padovan | 1d8f5d1 | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 4263 | } |
| 4264 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 4265 | chan->expected_ack_seq = req_seq; |
| 4266 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | 9f121a5 | 2009-10-03 02:34:38 -0300 | [diff] [blame] | 4267 | |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 4268 | tx_seq_offset = __seq_offset(chan, tx_seq, chan->buffer_seq); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4269 | |
| 4270 | /* invalid tx_seq */ |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 4271 | if (tx_seq_offset >= chan->tx_win) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 4272 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4273 | goto drop; |
| 4274 | } |
| 4275 | |
Szymon Janc | 77f918b | 2012-01-11 10:59:48 +0100 | [diff] [blame] | 4276 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
| 4277 | if (!test_bit(CONN_RNR_SENT, &chan->conn_state)) |
| 4278 | l2cap_send_ack(chan); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4279 | goto drop; |
Szymon Janc | 77f918b | 2012-01-11 10:59:48 +0100 | [diff] [blame] | 4280 | } |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4281 | |
Mat Martineau | 02f1b64 | 2011-06-29 14:35:19 -0700 | [diff] [blame] | 4282 | if (tx_seq == chan->expected_tx_seq) |
| 4283 | goto expected; |
| 4284 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4285 | if (test_bit(CONN_SREJ_SENT, &chan->conn_state)) { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4286 | struct srej_list *first; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4287 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 4288 | first = list_first_entry(&chan->srej_l, |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4289 | struct srej_list, list); |
| 4290 | if (tx_seq == first->tx_seq) { |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 4291 | l2cap_add_to_srej_queue(chan, skb, tx_seq, sar); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4292 | l2cap_check_srej_gap(chan, tx_seq); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4293 | |
| 4294 | list_del(&first->list); |
| 4295 | kfree(first); |
| 4296 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 4297 | if (list_empty(&chan->srej_l)) { |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 4298 | chan->buffer_seq = chan->buffer_seq_srej; |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4299 | clear_bit(CONN_SREJ_SENT, &chan->conn_state); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4300 | l2cap_send_ack(chan); |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 4301 | BT_DBG("chan %p, Exit SREJ_SENT", chan); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4302 | } |
| 4303 | } else { |
| 4304 | struct srej_list *l; |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4305 | |
| 4306 | /* duplicated tx_seq */ |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 4307 | if (l2cap_add_to_srej_queue(chan, skb, tx_seq, sar) < 0) |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4308 | goto drop; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4309 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 4310 | list_for_each_entry(l, &chan->srej_l, list) { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4311 | if (l->tx_seq == tx_seq) { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4312 | l2cap_resend_srejframe(chan, tx_seq); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4313 | return 0; |
| 4314 | } |
| 4315 | } |
Szymon Janc | aef89f2 | 2011-11-16 09:32:18 +0100 | [diff] [blame] | 4316 | |
| 4317 | err = l2cap_send_srejframe(chan, tx_seq); |
| 4318 | if (err < 0) { |
| 4319 | l2cap_send_disconn_req(chan->conn, chan, -err); |
| 4320 | return err; |
| 4321 | } |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 4322 | } |
| 4323 | } else { |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 4324 | expected_tx_seq_offset = __seq_offset(chan, |
| 4325 | chan->expected_tx_seq, chan->buffer_seq); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4326 | |
| 4327 | /* duplicated tx_seq */ |
| 4328 | if (tx_seq_offset < expected_tx_seq_offset) |
| 4329 | goto drop; |
| 4330 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4331 | set_bit(CONN_SREJ_SENT, &chan->conn_state); |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 4332 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 4333 | BT_DBG("chan %p, Enter SREJ", chan); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 4334 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 4335 | INIT_LIST_HEAD(&chan->srej_l); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 4336 | chan->buffer_seq_srej = chan->buffer_seq; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4337 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 4338 | __skb_queue_head_init(&chan->srej_q); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 4339 | l2cap_add_to_srej_queue(chan, skb, tx_seq, sar); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4340 | |
Szymon Janc | 0ef3ef0 | 2012-01-11 10:59:46 +0100 | [diff] [blame] | 4341 | /* Set P-bit only if there are some I-frames to ack. */ |
| 4342 | if (__clear_ack_timer(chan)) |
| 4343 | set_bit(CONN_SEND_PBIT, &chan->conn_state); |
Gustavo F. Padovan | ef54fd9 | 2009-08-20 22:26:04 -0300 | [diff] [blame] | 4344 | |
Szymon Janc | aef89f2 | 2011-11-16 09:32:18 +0100 | [diff] [blame] | 4345 | err = l2cap_send_srejframe(chan, tx_seq); |
| 4346 | if (err < 0) { |
| 4347 | l2cap_send_disconn_req(chan->conn, chan, -err); |
| 4348 | return err; |
| 4349 | } |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4350 | } |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 4351 | return 0; |
| 4352 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4353 | expected: |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 4354 | chan->expected_tx_seq = __next_seq(chan, chan->expected_tx_seq); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4355 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4356 | if (test_bit(CONN_SREJ_SENT, &chan->conn_state)) { |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 4357 | bt_cb(skb)->control.txseq = tx_seq; |
| 4358 | bt_cb(skb)->control.sar = sar; |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 4359 | __skb_queue_tail(&chan->srej_q, skb); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4360 | return 0; |
| 4361 | } |
| 4362 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4363 | err = l2cap_reassemble_sdu(chan, skb, rx_control); |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 4364 | chan->buffer_seq = __next_seq(chan, chan->buffer_seq); |
| 4365 | |
Mat Martineau | e328140 | 2011-07-07 09:39:02 -0700 | [diff] [blame] | 4366 | if (err < 0) { |
| 4367 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
| 4368 | return err; |
| 4369 | } |
Gustavo F. Padovan | 2ece368 | 2010-06-16 17:21:44 -0300 | [diff] [blame] | 4370 | |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 4371 | if (__is_ctrl_final(chan, rx_control)) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4372 | if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4373 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | 4ec10d9 | 2009-10-03 02:34:39 -0300 | [diff] [blame] | 4374 | } |
| 4375 | |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 4376 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 4377 | chan->num_acked = (chan->num_acked + 1) % num_to_ack; |
| 4378 | if (chan->num_acked == num_to_ack - 1) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4379 | l2cap_send_ack(chan); |
Gustavo F. Padovan | 4d611e4 | 2011-06-23 19:30:48 -0300 | [diff] [blame] | 4380 | else |
| 4381 | __set_ack_timer(chan); |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 4382 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4383 | return 0; |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4384 | |
| 4385 | drop: |
| 4386 | kfree_skb(skb); |
| 4387 | return 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4388 | } |
| 4389 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4390 | static inline void l2cap_data_channel_rrframe(struct l2cap_chan *chan, u32 rx_control) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4391 | { |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4392 | BT_DBG("chan %p, req_seq %d ctrl 0x%8.8x", chan, |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 4393 | __get_reqseq(chan, rx_control), rx_control); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 4394 | |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 4395 | chan->expected_ack_seq = __get_reqseq(chan, rx_control); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 4396 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4397 | |
Andrei Emeltchenko | e378173 | 2011-10-11 13:37:50 +0300 | [diff] [blame] | 4398 | if (__is_ctrl_poll(chan, rx_control)) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4399 | set_bit(CONN_SEND_FBIT, &chan->conn_state); |
| 4400 | if (test_bit(CONN_SREJ_SENT, &chan->conn_state)) { |
| 4401 | if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 4402 | (chan->unacked_frames > 0)) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 4403 | __set_retrans_timer(chan); |
Gustavo F. Padovan | 05fbd89 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 4404 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4405 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4406 | l2cap_send_srejtail(chan); |
Gustavo F. Padovan | 05fbd89 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 4407 | } else { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4408 | l2cap_send_i_or_rr_or_rnr(chan); |
Gustavo F. Padovan | 05fbd89 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 4409 | } |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4410 | |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 4411 | } else if (__is_ctrl_final(chan, rx_control)) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4412 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4413 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4414 | if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4415 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4416 | |
| 4417 | } else { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4418 | if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 4419 | (chan->unacked_frames > 0)) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 4420 | __set_retrans_timer(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4421 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4422 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
| 4423 | if (test_bit(CONN_SREJ_SENT, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4424 | l2cap_send_ack(chan); |
Andrei Emeltchenko | 894718a | 2010-12-01 16:58:24 +0200 | [diff] [blame] | 4425 | else |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4426 | l2cap_ertm_send(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4427 | } |
| 4428 | } |
| 4429 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4430 | static inline void l2cap_data_channel_rejframe(struct l2cap_chan *chan, u32 rx_control) |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4431 | { |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 4432 | u16 tx_seq = __get_reqseq(chan, rx_control); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4433 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4434 | BT_DBG("chan %p, req_seq %d ctrl 0x%8.8x", chan, tx_seq, rx_control); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 4435 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4436 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4437 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 4438 | chan->expected_ack_seq = tx_seq; |
| 4439 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4440 | |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 4441 | if (__is_ctrl_final(chan, rx_control)) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4442 | if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4443 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4444 | } else { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4445 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4446 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4447 | if (test_bit(CONN_WAIT_F, &chan->conn_state)) |
| 4448 | set_bit(CONN_REJ_ACT, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4449 | } |
| 4450 | } |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4451 | static inline void l2cap_data_channel_srejframe(struct l2cap_chan *chan, u32 rx_control) |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4452 | { |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 4453 | u16 tx_seq = __get_reqseq(chan, rx_control); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4454 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4455 | BT_DBG("chan %p, req_seq %d ctrl 0x%8.8x", chan, tx_seq, rx_control); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 4456 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4457 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4458 | |
Andrei Emeltchenko | e378173 | 2011-10-11 13:37:50 +0300 | [diff] [blame] | 4459 | if (__is_ctrl_poll(chan, rx_control)) { |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 4460 | chan->expected_ack_seq = tx_seq; |
| 4461 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 4462 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4463 | set_bit(CONN_SEND_FBIT, &chan->conn_state); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4464 | l2cap_retransmit_one_frame(chan, tx_seq); |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 4465 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4466 | l2cap_ertm_send(chan); |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 4467 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4468 | if (test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 4469 | chan->srej_save_reqseq = tx_seq; |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4470 | set_bit(CONN_SREJ_ACT, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4471 | } |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 4472 | } else if (__is_ctrl_final(chan, rx_control)) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4473 | if (test_bit(CONN_SREJ_ACT, &chan->conn_state) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 4474 | chan->srej_save_reqseq == tx_seq) |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4475 | clear_bit(CONN_SREJ_ACT, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4476 | else |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4477 | l2cap_retransmit_one_frame(chan, tx_seq); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4478 | } else { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4479 | l2cap_retransmit_one_frame(chan, tx_seq); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4480 | if (test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 4481 | chan->srej_save_reqseq = tx_seq; |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4482 | set_bit(CONN_SREJ_ACT, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4483 | } |
| 4484 | } |
| 4485 | } |
| 4486 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4487 | static inline void l2cap_data_channel_rnrframe(struct l2cap_chan *chan, u32 rx_control) |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4488 | { |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 4489 | u16 tx_seq = __get_reqseq(chan, rx_control); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4490 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4491 | BT_DBG("chan %p, req_seq %d ctrl 0x%8.8x", chan, tx_seq, rx_control); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 4492 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4493 | set_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 4494 | chan->expected_ack_seq = tx_seq; |
| 4495 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4496 | |
Andrei Emeltchenko | e378173 | 2011-10-11 13:37:50 +0300 | [diff] [blame] | 4497 | if (__is_ctrl_poll(chan, rx_control)) |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4498 | set_bit(CONN_SEND_FBIT, &chan->conn_state); |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 4499 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4500 | if (!test_bit(CONN_SREJ_SENT, &chan->conn_state)) { |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 4501 | __clear_retrans_timer(chan); |
Andrei Emeltchenko | e378173 | 2011-10-11 13:37:50 +0300 | [diff] [blame] | 4502 | if (__is_ctrl_poll(chan, rx_control)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4503 | l2cap_send_rr_or_rnr(chan, L2CAP_CTRL_FINAL); |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4504 | return; |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4505 | } |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4506 | |
Andrei Emeltchenko | e378173 | 2011-10-11 13:37:50 +0300 | [diff] [blame] | 4507 | if (__is_ctrl_poll(chan, rx_control)) { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4508 | l2cap_send_srejtail(chan); |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 4509 | } else { |
| 4510 | rx_control = __set_ctrl_super(chan, L2CAP_SUPER_RR); |
| 4511 | l2cap_send_sframe(chan, rx_control); |
| 4512 | } |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4513 | } |
| 4514 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4515 | static inline int l2cap_data_channel_sframe(struct l2cap_chan *chan, u32 rx_control, struct sk_buff *skb) |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4516 | { |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4517 | BT_DBG("chan %p rx_control 0x%8.8x len %d", chan, rx_control, skb->len); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4518 | |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 4519 | if (__is_ctrl_final(chan, rx_control) && |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4520 | test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 4521 | __clear_monitor_timer(chan); |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 4522 | if (chan->unacked_frames > 0) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 4523 | __set_retrans_timer(chan); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4524 | clear_bit(CONN_WAIT_F, &chan->conn_state); |
Gustavo F. Padovan | 1d8f5d1 | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 4525 | } |
| 4526 | |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 4527 | switch (__get_ctrl_super(chan, rx_control)) { |
| 4528 | case L2CAP_SUPER_RR: |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4529 | l2cap_data_channel_rrframe(chan, rx_control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4530 | break; |
| 4531 | |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 4532 | case L2CAP_SUPER_REJ: |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4533 | l2cap_data_channel_rejframe(chan, rx_control); |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 4534 | break; |
| 4535 | |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 4536 | case L2CAP_SUPER_SREJ: |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4537 | l2cap_data_channel_srejframe(chan, rx_control); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4538 | break; |
| 4539 | |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 4540 | case L2CAP_SUPER_RNR: |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4541 | l2cap_data_channel_rnrframe(chan, rx_control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4542 | break; |
| 4543 | } |
| 4544 | |
Gustavo F. Padovan | faaebd1 | 2010-05-01 16:15:35 -0300 | [diff] [blame] | 4545 | kfree_skb(skb); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4546 | return 0; |
| 4547 | } |
| 4548 | |
Szymon Janc | cad8f1d0 | 2012-01-23 10:06:05 +0100 | [diff] [blame] | 4549 | static int l2cap_ertm_data_rcv(struct l2cap_chan *chan, struct sk_buff *skb) |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4550 | { |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4551 | u32 control; |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 4552 | u16 req_seq; |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4553 | int len, next_tx_seq_offset, req_seq_offset; |
| 4554 | |
Mat Martineau | b76bbd6 | 2012-04-11 10:48:43 -0700 | [diff] [blame] | 4555 | __unpack_control(chan, skb); |
| 4556 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4557 | control = __get_control(chan, skb->data); |
| 4558 | skb_pull(skb, __ctrl_size(chan)); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4559 | len = skb->len; |
| 4560 | |
| 4561 | /* |
| 4562 | * We can just drop the corrupted I-frame here. |
| 4563 | * Receiver will miss it and start proper recovery |
| 4564 | * procedures and ask retransmission. |
| 4565 | */ |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 4566 | if (l2cap_check_fcs(chan, skb)) |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4567 | goto drop; |
| 4568 | |
Andrei Emeltchenko | 793c2f1 | 2011-10-11 13:37:48 +0300 | [diff] [blame] | 4569 | if (__is_sar_start(chan, control) && !__is_sframe(chan, control)) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 4570 | len -= L2CAP_SDULEN_SIZE; |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4571 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 4572 | if (chan->fcs == L2CAP_FCS_CRC16) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 4573 | len -= L2CAP_FCS_SIZE; |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4574 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 4575 | if (len > chan->mps) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 4576 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4577 | goto drop; |
| 4578 | } |
| 4579 | |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 4580 | req_seq = __get_reqseq(chan, control); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4581 | |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 4582 | req_seq_offset = __seq_offset(chan, req_seq, chan->expected_ack_seq); |
| 4583 | |
| 4584 | next_tx_seq_offset = __seq_offset(chan, chan->next_tx_seq, |
| 4585 | chan->expected_ack_seq); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4586 | |
| 4587 | /* check for invalid req-seq */ |
| 4588 | if (req_seq_offset > next_tx_seq_offset) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 4589 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4590 | goto drop; |
| 4591 | } |
| 4592 | |
Andrei Emeltchenko | 793c2f1 | 2011-10-11 13:37:48 +0300 | [diff] [blame] | 4593 | if (!__is_sframe(chan, control)) { |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4594 | if (len < 0) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 4595 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4596 | goto drop; |
| 4597 | } |
| 4598 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4599 | l2cap_data_channel_iframe(chan, control, skb); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4600 | } else { |
| 4601 | if (len != 0) { |
| 4602 | BT_ERR("%d", len); |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 4603 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4604 | goto drop; |
| 4605 | } |
| 4606 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4607 | l2cap_data_channel_sframe(chan, control, skb); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4608 | } |
| 4609 | |
| 4610 | return 0; |
| 4611 | |
| 4612 | drop: |
| 4613 | kfree_skb(skb); |
| 4614 | return 0; |
| 4615 | } |
| 4616 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4617 | static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) |
| 4618 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4619 | struct l2cap_chan *chan; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4620 | u32 control; |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 4621 | u16 tx_seq; |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4622 | int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4623 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 4624 | chan = l2cap_get_chan_by_scid(conn, cid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4625 | if (!chan) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4626 | BT_DBG("unknown cid 0x%4.4x", cid); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 4627 | /* Drop packet and return */ |
Dan Carpenter | 3379013 | 2012-02-28 09:52:46 +0300 | [diff] [blame] | 4628 | kfree_skb(skb); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 4629 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4630 | } |
| 4631 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 4632 | BT_DBG("chan %p, len %d", chan, skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4633 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4634 | if (chan->state != BT_CONNECTED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4635 | goto drop; |
| 4636 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 4637 | switch (chan->mode) { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4638 | case L2CAP_MODE_BASIC: |
| 4639 | /* If socket recv buffers overflows we drop data here |
| 4640 | * which is *bad* because L2CAP has to be reliable. |
| 4641 | * But we don't have any other choice. L2CAP doesn't |
| 4642 | * provide flow control mechanism. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4643 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 4644 | if (chan->imtu < skb->len) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4645 | goto drop; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4646 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 4647 | if (!chan->ops->recv(chan->data, skb)) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4648 | goto done; |
| 4649 | break; |
| 4650 | |
| 4651 | case L2CAP_MODE_ERTM: |
Andrei Emeltchenko | 5ef8cb9 | 2012-01-13 17:21:42 +0200 | [diff] [blame] | 4652 | l2cap_ertm_data_rcv(chan, skb); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4653 | |
Andrei Emeltchenko | fcafde2 | 2009-12-22 15:58:08 +0200 | [diff] [blame] | 4654 | goto done; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4655 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 4656 | case L2CAP_MODE_STREAMING: |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4657 | control = __get_control(chan, skb->data); |
| 4658 | skb_pull(skb, __ctrl_size(chan)); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 4659 | len = skb->len; |
| 4660 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 4661 | if (l2cap_check_fcs(chan, skb)) |
Gustavo F. Padovan | 2600008 | 2010-05-11 22:02:00 -0300 | [diff] [blame] | 4662 | goto drop; |
| 4663 | |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 4664 | if (__is_sar_start(chan, control)) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 4665 | len -= L2CAP_SDULEN_SIZE; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 4666 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 4667 | if (chan->fcs == L2CAP_FCS_CRC16) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 4668 | len -= L2CAP_FCS_SIZE; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 4669 | |
Andrei Emeltchenko | 793c2f1 | 2011-10-11 13:37:48 +0300 | [diff] [blame] | 4670 | if (len > chan->mps || len < 0 || __is_sframe(chan, control)) |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 4671 | goto drop; |
| 4672 | |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 4673 | tx_seq = __get_txseq(chan, control); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 4674 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4675 | if (chan->expected_tx_seq != tx_seq) { |
| 4676 | /* Frame(s) missing - must discard partial SDU */ |
| 4677 | kfree_skb(chan->sdu); |
| 4678 | chan->sdu = NULL; |
| 4679 | chan->sdu_last_frag = NULL; |
| 4680 | chan->sdu_len = 0; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 4681 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4682 | /* TODO: Notify userland of missing data */ |
| 4683 | } |
| 4684 | |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 4685 | chan->expected_tx_seq = __next_seq(chan, tx_seq); |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4686 | |
| 4687 | if (l2cap_reassemble_sdu(chan, skb, control) == -EMSGSIZE) |
| 4688 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 4689 | |
| 4690 | goto done; |
| 4691 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4692 | default: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 4693 | BT_DBG("chan %p: bad mode 0x%2.2x", chan, chan->mode); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4694 | break; |
| 4695 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4696 | |
| 4697 | drop: |
| 4698 | kfree_skb(skb); |
| 4699 | |
| 4700 | done: |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 4701 | l2cap_chan_unlock(chan); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4702 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4703 | return 0; |
| 4704 | } |
| 4705 | |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 4706 | static inline int l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4707 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4708 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4709 | |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 4710 | chan = l2cap_global_chan_by_psm(0, psm, conn->src, conn->dst); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4711 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4712 | goto drop; |
| 4713 | |
Andrei Emeltchenko | 5b4ceda | 2012-02-24 16:35:32 +0200 | [diff] [blame] | 4714 | BT_DBG("chan %p, len %d", chan, skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4715 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4716 | if (chan->state != BT_BOUND && chan->state != BT_CONNECTED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4717 | goto drop; |
| 4718 | |
Vinicius Costa Gomes | e13e21d | 2011-06-17 22:46:27 -0300 | [diff] [blame] | 4719 | if (chan->imtu < skb->len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4720 | goto drop; |
| 4721 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 4722 | if (!chan->ops->recv(chan->data, skb)) |
Andrei Emeltchenko | 5b4ceda | 2012-02-24 16:35:32 +0200 | [diff] [blame] | 4723 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4724 | |
| 4725 | drop: |
| 4726 | kfree_skb(skb); |
| 4727 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4728 | return 0; |
| 4729 | } |
| 4730 | |
Andrei Emeltchenko | d9b8870 | 2012-03-12 12:13:08 +0200 | [diff] [blame] | 4731 | static inline int l2cap_att_channel(struct l2cap_conn *conn, u16 cid, |
| 4732 | struct sk_buff *skb) |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4733 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4734 | struct l2cap_chan *chan; |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4735 | |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 4736 | chan = l2cap_global_chan_by_scid(0, cid, conn->src, conn->dst); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4737 | if (!chan) |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4738 | goto drop; |
| 4739 | |
Andrei Emeltchenko | 5b4ceda | 2012-02-24 16:35:32 +0200 | [diff] [blame] | 4740 | BT_DBG("chan %p, len %d", chan, skb->len); |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4741 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4742 | if (chan->state != BT_BOUND && chan->state != BT_CONNECTED) |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4743 | goto drop; |
| 4744 | |
Vinicius Costa Gomes | e13e21d | 2011-06-17 22:46:27 -0300 | [diff] [blame] | 4745 | if (chan->imtu < skb->len) |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4746 | goto drop; |
| 4747 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 4748 | if (!chan->ops->recv(chan->data, skb)) |
Andrei Emeltchenko | 5b4ceda | 2012-02-24 16:35:32 +0200 | [diff] [blame] | 4749 | return 0; |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4750 | |
| 4751 | drop: |
| 4752 | kfree_skb(skb); |
| 4753 | |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4754 | return 0; |
| 4755 | } |
| 4756 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4757 | static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) |
| 4758 | { |
| 4759 | struct l2cap_hdr *lh = (void *) skb->data; |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 4760 | u16 cid, len; |
| 4761 | __le16 psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4762 | |
| 4763 | skb_pull(skb, L2CAP_HDR_SIZE); |
| 4764 | cid = __le16_to_cpu(lh->cid); |
| 4765 | len = __le16_to_cpu(lh->len); |
| 4766 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4767 | if (len != skb->len) { |
| 4768 | kfree_skb(skb); |
| 4769 | return; |
| 4770 | } |
| 4771 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4772 | BT_DBG("len %d, cid 0x%4.4x", len, cid); |
| 4773 | |
| 4774 | switch (cid) { |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 4775 | case L2CAP_CID_LE_SIGNALING: |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 4776 | case L2CAP_CID_SIGNALING: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4777 | l2cap_sig_channel(conn, skb); |
| 4778 | break; |
| 4779 | |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 4780 | case L2CAP_CID_CONN_LESS: |
Andrei Emeltchenko | 097db76 | 2012-03-09 14:16:17 +0200 | [diff] [blame] | 4781 | psm = get_unaligned((__le16 *) skb->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4782 | skb_pull(skb, 2); |
| 4783 | l2cap_conless_channel(conn, psm, skb); |
| 4784 | break; |
| 4785 | |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4786 | case L2CAP_CID_LE_DATA: |
| 4787 | l2cap_att_channel(conn, cid, skb); |
| 4788 | break; |
| 4789 | |
Anderson Briglia | b501d6a | 2011-06-07 18:46:31 -0300 | [diff] [blame] | 4790 | case L2CAP_CID_SMP: |
| 4791 | if (smp_sig_channel(conn, skb)) |
| 4792 | l2cap_conn_del(conn->hcon, EACCES); |
| 4793 | break; |
| 4794 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4795 | default: |
| 4796 | l2cap_data_channel(conn, cid, skb); |
| 4797 | break; |
| 4798 | } |
| 4799 | } |
| 4800 | |
| 4801 | /* ---- L2CAP interface with lower layer (HCI) ---- */ |
| 4802 | |
Ulisses Furquim | 686ebf2 | 2011-12-21 10:11:33 -0200 | [diff] [blame] | 4803 | int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4804 | { |
| 4805 | int exact = 0, lm1 = 0, lm2 = 0; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4806 | struct l2cap_chan *c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4807 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4808 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); |
| 4809 | |
| 4810 | /* Find listening sockets and check their link_mode */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4811 | read_lock(&chan_list_lock); |
| 4812 | list_for_each_entry(c, &chan_list, global_l) { |
| 4813 | struct sock *sk = c->sk; |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4814 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4815 | if (c->state != BT_LISTEN) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4816 | continue; |
| 4817 | |
| 4818 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 4819 | lm1 |= HCI_LM_ACCEPT; |
Andrei Emeltchenko | 43bd0f3 | 2011-10-11 14:04:34 +0300 | [diff] [blame] | 4820 | if (test_bit(FLAG_ROLE_SWITCH, &c->flags)) |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 4821 | lm1 |= HCI_LM_MASTER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4822 | exact++; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 4823 | } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { |
| 4824 | lm2 |= HCI_LM_ACCEPT; |
Andrei Emeltchenko | 43bd0f3 | 2011-10-11 14:04:34 +0300 | [diff] [blame] | 4825 | if (test_bit(FLAG_ROLE_SWITCH, &c->flags)) |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 4826 | lm2 |= HCI_LM_MASTER; |
| 4827 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4828 | } |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4829 | read_unlock(&chan_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4830 | |
| 4831 | return exact ? lm1 : lm2; |
| 4832 | } |
| 4833 | |
Ulisses Furquim | 686ebf2 | 2011-12-21 10:11:33 -0200 | [diff] [blame] | 4834 | int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4835 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4836 | struct l2cap_conn *conn; |
| 4837 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4838 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); |
| 4839 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4840 | if (!status) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4841 | conn = l2cap_conn_add(hcon, status); |
| 4842 | if (conn) |
| 4843 | l2cap_conn_ready(conn); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4844 | } else |
Joe Perches | e175072 | 2011-06-29 18:18:29 -0700 | [diff] [blame] | 4845 | l2cap_conn_del(hcon, bt_to_errno(status)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4846 | |
| 4847 | return 0; |
| 4848 | } |
| 4849 | |
Ulisses Furquim | 686ebf2 | 2011-12-21 10:11:33 -0200 | [diff] [blame] | 4850 | int l2cap_disconn_ind(struct hci_conn *hcon) |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 4851 | { |
| 4852 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 4853 | |
| 4854 | BT_DBG("hcon %p", hcon); |
| 4855 | |
Ulisses Furquim | 686ebf2 | 2011-12-21 10:11:33 -0200 | [diff] [blame] | 4856 | if (!conn) |
Andrei Emeltchenko | 9f5a0d7 | 2011-11-07 14:20:25 +0200 | [diff] [blame] | 4857 | return HCI_ERROR_REMOTE_USER_TERM; |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 4858 | return conn->disc_reason; |
| 4859 | } |
| 4860 | |
Ulisses Furquim | 686ebf2 | 2011-12-21 10:11:33 -0200 | [diff] [blame] | 4861 | int l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4862 | { |
| 4863 | BT_DBG("hcon %p reason %d", hcon, reason); |
| 4864 | |
Joe Perches | e175072 | 2011-06-29 18:18:29 -0700 | [diff] [blame] | 4865 | l2cap_conn_del(hcon, bt_to_errno(reason)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4866 | return 0; |
| 4867 | } |
| 4868 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4869 | static inline void l2cap_check_encryption(struct l2cap_chan *chan, u8 encrypt) |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4870 | { |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 4871 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) |
Marcel Holtmann | 255c760 | 2009-02-04 21:07:19 +0100 | [diff] [blame] | 4872 | return; |
| 4873 | |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4874 | if (encrypt == 0x00) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4875 | if (chan->sec_level == BT_SECURITY_MEDIUM) { |
Marcel Holtmann | ba13ccd | 2012-03-01 14:25:33 -0800 | [diff] [blame] | 4876 | __set_chan_timer(chan, L2CAP_ENC_TIMEOUT); |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4877 | } else if (chan->sec_level == BT_SECURITY_HIGH) |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 4878 | l2cap_chan_close(chan, ECONNREFUSED); |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4879 | } else { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4880 | if (chan->sec_level == BT_SECURITY_MEDIUM) |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 4881 | __clear_chan_timer(chan); |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4882 | } |
| 4883 | } |
| 4884 | |
Ulisses Furquim | 686ebf2 | 2011-12-21 10:11:33 -0200 | [diff] [blame] | 4885 | int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4886 | { |
Marcel Holtmann | 40be492 | 2008-07-14 20:13:50 +0200 | [diff] [blame] | 4887 | struct l2cap_conn *conn = hcon->l2cap_data; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4888 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4889 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4890 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4891 | return 0; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4892 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4893 | BT_DBG("conn %p", conn); |
| 4894 | |
Vinicius Costa Gomes | 160dc6a | 2011-08-19 21:06:55 -0300 | [diff] [blame] | 4895 | if (hcon->type == LE_LINK) { |
Hemant Gupta | 35d4adcc | 2012-04-18 14:46:26 +0530 | [diff] [blame] | 4896 | if (!status && encrypt) |
| 4897 | smp_distribute_keys(conn, 0); |
Ulisses Furquim | 17cd3f3 | 2012-01-30 18:26:28 -0200 | [diff] [blame] | 4898 | cancel_delayed_work(&conn->security_timer); |
Vinicius Costa Gomes | 160dc6a | 2011-08-19 21:06:55 -0300 | [diff] [blame] | 4899 | } |
| 4900 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 4901 | mutex_lock(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4902 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 4903 | list_for_each_entry(chan, &conn->chan_l, list) { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 4904 | l2cap_chan_lock(chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4905 | |
Vinicius Costa Gomes | f1cb9af | 2011-01-26 21:42:57 -0300 | [diff] [blame] | 4906 | BT_DBG("chan->scid %d", chan->scid); |
| 4907 | |
| 4908 | if (chan->scid == L2CAP_CID_LE_DATA) { |
| 4909 | if (!status && encrypt) { |
| 4910 | chan->sec_level = hcon->sec_level; |
Andrei Emeltchenko | cf4cd00 | 2012-02-06 15:03:59 +0200 | [diff] [blame] | 4911 | l2cap_chan_ready(chan); |
Vinicius Costa Gomes | f1cb9af | 2011-01-26 21:42:57 -0300 | [diff] [blame] | 4912 | } |
| 4913 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 4914 | l2cap_chan_unlock(chan); |
Vinicius Costa Gomes | f1cb9af | 2011-01-26 21:42:57 -0300 | [diff] [blame] | 4915 | continue; |
| 4916 | } |
| 4917 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 4918 | if (test_bit(CONF_CONNECT_PEND, &chan->conf_state)) { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 4919 | l2cap_chan_unlock(chan); |
Marcel Holtmann | 6a8d301 | 2009-02-06 23:56:36 +0100 | [diff] [blame] | 4920 | continue; |
| 4921 | } |
| 4922 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4923 | if (!status && (chan->state == BT_CONNECTED || |
| 4924 | chan->state == BT_CONFIG)) { |
Gustavo Padovan | a7d7723 | 2012-05-13 03:20:07 -0300 | [diff] [blame] | 4925 | struct sock *sk = chan->sk; |
| 4926 | |
| 4927 | bt_sk(sk)->suspended = false; |
| 4928 | sk->sk_state_change(sk); |
| 4929 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4930 | l2cap_check_encryption(chan, encrypt); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 4931 | l2cap_chan_unlock(chan); |
Marcel Holtmann | 9719f8a | 2008-07-14 20:13:45 +0200 | [diff] [blame] | 4932 | continue; |
| 4933 | } |
| 4934 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4935 | if (chan->state == BT_CONNECT) { |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4936 | if (!status) { |
Andrei Emeltchenko | 9b27f35 | 2012-02-24 16:00:00 +0200 | [diff] [blame] | 4937 | l2cap_send_conn_req(chan); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4938 | } else { |
Marcel Holtmann | ba13ccd | 2012-03-01 14:25:33 -0800 | [diff] [blame] | 4939 | __set_chan_timer(chan, L2CAP_DISC_TIMEOUT); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4940 | } |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4941 | } else if (chan->state == BT_CONNECT2) { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 4942 | struct sock *sk = chan->sk; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4943 | struct l2cap_conn_rsp rsp; |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4944 | __u16 res, stat; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4945 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 4946 | lock_sock(sk); |
| 4947 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4948 | if (!status) { |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4949 | if (bt_sk(sk)->defer_setup) { |
| 4950 | struct sock *parent = bt_sk(sk)->parent; |
| 4951 | res = L2CAP_CR_PEND; |
| 4952 | stat = L2CAP_CS_AUTHOR_PEND; |
Ilia Kolomisnky | 05e9a2f | 2011-07-15 18:30:21 +0000 | [diff] [blame] | 4953 | if (parent) |
| 4954 | parent->sk_data_ready(parent, 0); |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4955 | } else { |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 4956 | __l2cap_state_change(chan, BT_CONFIG); |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4957 | res = L2CAP_CR_SUCCESS; |
| 4958 | stat = L2CAP_CS_NO_INFO; |
| 4959 | } |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4960 | } else { |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 4961 | __l2cap_state_change(chan, BT_DISCONN); |
Marcel Holtmann | ba13ccd | 2012-03-01 14:25:33 -0800 | [diff] [blame] | 4962 | __set_chan_timer(chan, L2CAP_DISC_TIMEOUT); |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4963 | res = L2CAP_CR_SEC_BLOCK; |
| 4964 | stat = L2CAP_CS_NO_INFO; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4965 | } |
| 4966 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 4967 | release_sock(sk); |
| 4968 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 4969 | rsp.scid = cpu_to_le16(chan->dcid); |
| 4970 | rsp.dcid = cpu_to_le16(chan->scid); |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4971 | rsp.result = cpu_to_le16(res); |
| 4972 | rsp.status = cpu_to_le16(stat); |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 4973 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, |
| 4974 | sizeof(rsp), &rsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4975 | } |
| 4976 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 4977 | l2cap_chan_unlock(chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4978 | } |
| 4979 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 4980 | mutex_unlock(&conn->chan_lock); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4981 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4982 | return 0; |
| 4983 | } |
| 4984 | |
Ulisses Furquim | 686ebf2 | 2011-12-21 10:11:33 -0200 | [diff] [blame] | 4985 | int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4986 | { |
| 4987 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 4988 | |
Andrei Emeltchenko | 5a08ecc | 2011-01-11 17:20:20 +0200 | [diff] [blame] | 4989 | if (!conn) |
| 4990 | conn = l2cap_conn_add(hcon, 0); |
| 4991 | |
| 4992 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4993 | goto drop; |
| 4994 | |
| 4995 | BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); |
| 4996 | |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 4997 | if (!(flags & ACL_CONT)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4998 | struct l2cap_hdr *hdr; |
| 4999 | int len; |
| 5000 | |
| 5001 | if (conn->rx_len) { |
| 5002 | BT_ERR("Unexpected start frame (len %d)", skb->len); |
| 5003 | kfree_skb(conn->rx_skb); |
| 5004 | conn->rx_skb = NULL; |
| 5005 | conn->rx_len = 0; |
| 5006 | l2cap_conn_unreliable(conn, ECOMM); |
| 5007 | } |
| 5008 | |
Andrei Emeltchenko | aae7fe2 | 2010-09-15 14:28:43 +0300 | [diff] [blame] | 5009 | /* Start fragment always begin with Basic L2CAP header */ |
| 5010 | if (skb->len < L2CAP_HDR_SIZE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5011 | BT_ERR("Frame is too short (len %d)", skb->len); |
| 5012 | l2cap_conn_unreliable(conn, ECOMM); |
| 5013 | goto drop; |
| 5014 | } |
| 5015 | |
| 5016 | hdr = (struct l2cap_hdr *) skb->data; |
| 5017 | len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; |
| 5018 | |
| 5019 | if (len == skb->len) { |
| 5020 | /* Complete frame received */ |
| 5021 | l2cap_recv_frame(conn, skb); |
| 5022 | return 0; |
| 5023 | } |
| 5024 | |
| 5025 | BT_DBG("Start: total len %d, frag len %d", len, skb->len); |
| 5026 | |
| 5027 | if (skb->len > len) { |
| 5028 | BT_ERR("Frame is too long (len %d, expected len %d)", |
| 5029 | skb->len, len); |
| 5030 | l2cap_conn_unreliable(conn, ECOMM); |
| 5031 | goto drop; |
| 5032 | } |
| 5033 | |
| 5034 | /* Allocate skb for the complete frame (with header) */ |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 5035 | conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC); |
| 5036 | if (!conn->rx_skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5037 | goto drop; |
| 5038 | |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 5039 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 5040 | skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5041 | conn->rx_len = len - skb->len; |
| 5042 | } else { |
| 5043 | BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); |
| 5044 | |
| 5045 | if (!conn->rx_len) { |
| 5046 | BT_ERR("Unexpected continuation frame (len %d)", skb->len); |
| 5047 | l2cap_conn_unreliable(conn, ECOMM); |
| 5048 | goto drop; |
| 5049 | } |
| 5050 | |
| 5051 | if (skb->len > conn->rx_len) { |
| 5052 | BT_ERR("Fragment is too long (len %d, expected %d)", |
| 5053 | skb->len, conn->rx_len); |
| 5054 | kfree_skb(conn->rx_skb); |
| 5055 | conn->rx_skb = NULL; |
| 5056 | conn->rx_len = 0; |
| 5057 | l2cap_conn_unreliable(conn, ECOMM); |
| 5058 | goto drop; |
| 5059 | } |
| 5060 | |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 5061 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 5062 | skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5063 | conn->rx_len -= skb->len; |
| 5064 | |
| 5065 | if (!conn->rx_len) { |
| 5066 | /* Complete frame received */ |
| 5067 | l2cap_recv_frame(conn, conn->rx_skb); |
| 5068 | conn->rx_skb = NULL; |
| 5069 | } |
| 5070 | } |
| 5071 | |
| 5072 | drop: |
| 5073 | kfree_skb(skb); |
| 5074 | return 0; |
| 5075 | } |
| 5076 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 5077 | static int l2cap_debugfs_show(struct seq_file *f, void *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5078 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 5079 | struct l2cap_chan *c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5080 | |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 5081 | read_lock(&chan_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5082 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 5083 | list_for_each_entry(c, &chan_list, global_l) { |
| 5084 | struct sock *sk = c->sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5085 | |
Gustavo F. Padovan | 903d343 | 2011-02-10 14:16:06 -0200 | [diff] [blame] | 5086 | seq_printf(f, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d %d %d\n", |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 5087 | batostr(&bt_sk(sk)->src), |
| 5088 | batostr(&bt_sk(sk)->dst), |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 5089 | c->state, __le16_to_cpu(c->psm), |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 5090 | c->scid, c->dcid, c->imtu, c->omtu, |
| 5091 | c->sec_level, c->mode); |
Andrei Emeltchenko | 61e1b4b | 2012-01-19 11:19:50 +0200 | [diff] [blame] | 5092 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5093 | |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 5094 | read_unlock(&chan_list_lock); |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 5095 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 5096 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5097 | } |
| 5098 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 5099 | static int l2cap_debugfs_open(struct inode *inode, struct file *file) |
| 5100 | { |
| 5101 | return single_open(file, l2cap_debugfs_show, inode->i_private); |
| 5102 | } |
| 5103 | |
| 5104 | static const struct file_operations l2cap_debugfs_fops = { |
| 5105 | .open = l2cap_debugfs_open, |
| 5106 | .read = seq_read, |
| 5107 | .llseek = seq_lseek, |
| 5108 | .release = single_release, |
| 5109 | }; |
| 5110 | |
| 5111 | static struct dentry *l2cap_debugfs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5112 | |
Gustavo F. Padovan | 6427451 | 2011-02-07 20:08:52 -0200 | [diff] [blame] | 5113 | int __init l2cap_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5114 | { |
| 5115 | int err; |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 5116 | |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 5117 | err = l2cap_init_sockets(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5118 | if (err < 0) |
| 5119 | return err; |
| 5120 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 5121 | if (bt_debugfs) { |
| 5122 | l2cap_debugfs = debugfs_create_file("l2cap", 0444, |
| 5123 | bt_debugfs, NULL, &l2cap_debugfs_fops); |
| 5124 | if (!l2cap_debugfs) |
| 5125 | BT_ERR("Failed to create L2CAP debug file"); |
| 5126 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5127 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5128 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5129 | } |
| 5130 | |
Gustavo F. Padovan | 6427451 | 2011-02-07 20:08:52 -0200 | [diff] [blame] | 5131 | void l2cap_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5132 | { |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 5133 | debugfs_remove(l2cap_debugfs); |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 5134 | l2cap_cleanup_sockets(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5135 | } |
| 5136 | |
Gustavo F. Padovan | d1c4a17 | 2010-07-18 16:25:54 -0300 | [diff] [blame] | 5137 | module_param(disable_ertm, bool, 0644); |
| 5138 | MODULE_PARM_DESC(disable_ertm, "Disable enhanced retransmission mode"); |