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 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | |
| 8 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License version 2 as |
| 12 | published by the Free Software Foundation; |
| 13 | |
| 14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| 15 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 16 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. |
| 17 | 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] | 18 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
| 19 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 20 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 22 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 23 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
| 24 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | SOFTWARE IS DISCLAIMED. |
| 26 | */ |
| 27 | |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 28 | /* Bluetooth L2CAP core. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/module.h> |
| 31 | |
| 32 | #include <linux/types.h> |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 33 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include <linux/errno.h> |
| 35 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <linux/sched.h> |
| 37 | #include <linux/slab.h> |
| 38 | #include <linux/poll.h> |
| 39 | #include <linux/fcntl.h> |
| 40 | #include <linux/init.h> |
| 41 | #include <linux/interrupt.h> |
| 42 | #include <linux/socket.h> |
| 43 | #include <linux/skbuff.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include <linux/list.h> |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 45 | #include <linux/device.h> |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 46 | #include <linux/debugfs.h> |
| 47 | #include <linux/seq_file.h> |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 48 | #include <linux/uaccess.h> |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 49 | #include <linux/crc16.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #include <net/sock.h> |
| 51 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | #include <asm/unaligned.h> |
| 53 | |
| 54 | #include <net/bluetooth/bluetooth.h> |
| 55 | #include <net/bluetooth/hci_core.h> |
| 56 | #include <net/bluetooth/l2cap.h> |
Anderson Briglia | b501d6a | 2011-06-07 18:46:31 -0300 | [diff] [blame] | 57 | #include <net/bluetooth/smp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | |
Rusty Russell | eb93992 | 2011-12-19 14:08:01 +0000 | [diff] [blame] | 59 | bool disable_ertm; |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 60 | |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 61 | static u32 l2cap_feat_mask = L2CAP_FEAT_FIXED_CHAN; |
Mat Martineau | 50a147c | 2011-11-02 16:18:34 -0700 | [diff] [blame] | 62 | static u8 l2cap_fixed_chan[8] = { L2CAP_FC_L2CAP, }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
Johannes Berg | b5ad8b7 | 2011-06-01 08:54:45 +0200 | [diff] [blame] | 64 | static LIST_HEAD(chan_list); |
| 65 | static DEFINE_RWLOCK(chan_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, |
| 68 | u8 code, u8 ident, u16 dlen, void *data); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 69 | static void l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, |
| 70 | void *data); |
Gustavo F. Padovan | 710f9b0a | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 71 | 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] | 72 | static void l2cap_send_disconn_req(struct l2cap_conn *conn, |
| 73 | struct l2cap_chan *chan, int err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 75 | /* ---- L2CAP channels ---- */ |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 76 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 77 | 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] | 78 | { |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 79 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 80 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 81 | list_for_each_entry(c, &conn->chan_l, list) { |
| 82 | if (c->dcid == cid) |
| 83 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 84 | } |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 85 | return NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 86 | } |
| 87 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 88 | 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] | 89 | { |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 90 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 91 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 92 | list_for_each_entry(c, &conn->chan_l, list) { |
| 93 | if (c->scid == cid) |
| 94 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 95 | } |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 96 | return NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 97 | } |
| 98 | |
| 99 | /* Find channel with given SCID. |
| 100 | * Returns locked socket */ |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 101 | 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] | 102 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 103 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 104 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 105 | mutex_lock(&conn->chan_lock); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 106 | c = __l2cap_get_chan_by_scid(conn, cid); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 107 | mutex_unlock(&conn->chan_lock); |
| 108 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 109 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 110 | } |
| 111 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 112 | 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] | 113 | { |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 114 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 115 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 116 | list_for_each_entry(c, &conn->chan_l, list) { |
| 117 | if (c->ident == ident) |
| 118 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 119 | } |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 120 | return NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 121 | } |
| 122 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 123 | 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] | 124 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 125 | struct l2cap_chan *c; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 126 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 127 | list_for_each_entry(c, &chan_list, global_l) { |
| 128 | if (c->sport == psm && !bacmp(&bt_sk(c->sk)->src, src)) |
Szymon Janc | 250938c | 2011-11-16 09:32:22 +0100 | [diff] [blame] | 129 | return c; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 130 | } |
Szymon Janc | 250938c | 2011-11-16 09:32:22 +0100 | [diff] [blame] | 131 | return NULL; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 132 | } |
| 133 | |
| 134 | int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm) |
| 135 | { |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 136 | int err; |
| 137 | |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 138 | write_lock(&chan_list_lock); |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 139 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 140 | if (psm && __l2cap_global_chan_by_addr(psm, src)) { |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 141 | err = -EADDRINUSE; |
| 142 | goto done; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 143 | } |
| 144 | |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 145 | if (psm) { |
| 146 | chan->psm = psm; |
| 147 | chan->sport = psm; |
| 148 | err = 0; |
| 149 | } else { |
| 150 | u16 p; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 151 | |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 152 | err = -EINVAL; |
| 153 | for (p = 0x1001; p < 0x1100; p += 2) |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 154 | if (!__l2cap_global_chan_by_addr(cpu_to_le16(p), src)) { |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 155 | chan->psm = cpu_to_le16(p); |
| 156 | chan->sport = cpu_to_le16(p); |
| 157 | err = 0; |
| 158 | break; |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | done: |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 163 | write_unlock(&chan_list_lock); |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 164 | return err; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 165 | } |
| 166 | |
| 167 | int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid) |
| 168 | { |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 169 | write_lock(&chan_list_lock); |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 170 | |
| 171 | chan->scid = scid; |
| 172 | |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 173 | write_unlock(&chan_list_lock); |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 174 | |
| 175 | return 0; |
| 176 | } |
| 177 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 178 | static u16 l2cap_alloc_cid(struct l2cap_conn *conn) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 179 | { |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 180 | u16 cid = L2CAP_CID_DYN_START; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 181 | |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 182 | for (; cid < L2CAP_CID_DYN_END; cid++) { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 183 | if (!__l2cap_get_chan_by_scid(conn, cid)) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 184 | return cid; |
| 185 | } |
| 186 | |
| 187 | return 0; |
| 188 | } |
| 189 | |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 190 | static void __l2cap_state_change(struct l2cap_chan *chan, int state) |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 191 | { |
Andrei Emeltchenko | 42d2d87 | 2012-02-17 11:40:57 +0200 | [diff] [blame] | 192 | 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] | 193 | state_to_string(state)); |
| 194 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 195 | chan->state = state; |
| 196 | chan->ops->state_change(chan->data, state); |
| 197 | } |
| 198 | |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 199 | static void l2cap_state_change(struct l2cap_chan *chan, int state) |
| 200 | { |
| 201 | struct sock *sk = chan->sk; |
| 202 | |
| 203 | lock_sock(sk); |
| 204 | __l2cap_state_change(chan, state); |
| 205 | release_sock(sk); |
| 206 | } |
| 207 | |
Andrei Emeltchenko | 2e0052e | 2012-02-21 12:54:58 +0200 | [diff] [blame] | 208 | static inline void __l2cap_chan_set_err(struct l2cap_chan *chan, int err) |
| 209 | { |
| 210 | struct sock *sk = chan->sk; |
| 211 | |
| 212 | sk->sk_err = err; |
| 213 | } |
| 214 | |
| 215 | static inline void l2cap_chan_set_err(struct l2cap_chan *chan, int err) |
| 216 | { |
| 217 | struct sock *sk = chan->sk; |
| 218 | |
| 219 | lock_sock(sk); |
| 220 | __l2cap_chan_set_err(chan, err); |
| 221 | release_sock(sk); |
| 222 | } |
| 223 | |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 224 | /* ---- L2CAP sequence number lists ---- */ |
| 225 | |
| 226 | /* For ERTM, ordered lists of sequence numbers must be tracked for |
| 227 | * SREJ requests that are received and for frames that are to be |
| 228 | * retransmitted. These seq_list functions implement a singly-linked |
| 229 | * list in an array, where membership in the list can also be checked |
| 230 | * in constant time. Items can also be added to the tail of the list |
| 231 | * and removed from the head in constant time, without further memory |
| 232 | * allocs or frees. |
| 233 | */ |
| 234 | |
| 235 | static int l2cap_seq_list_init(struct l2cap_seq_list *seq_list, u16 size) |
| 236 | { |
| 237 | size_t alloc_size, i; |
| 238 | |
| 239 | /* Allocated size is a power of 2 to map sequence numbers |
| 240 | * (which may be up to 14 bits) in to a smaller array that is |
| 241 | * sized for the negotiated ERTM transmit windows. |
| 242 | */ |
| 243 | alloc_size = roundup_pow_of_two(size); |
| 244 | |
| 245 | seq_list->list = kmalloc(sizeof(u16) * alloc_size, GFP_KERNEL); |
| 246 | if (!seq_list->list) |
| 247 | return -ENOMEM; |
| 248 | |
| 249 | seq_list->mask = alloc_size - 1; |
| 250 | seq_list->head = L2CAP_SEQ_LIST_CLEAR; |
| 251 | seq_list->tail = L2CAP_SEQ_LIST_CLEAR; |
| 252 | for (i = 0; i < alloc_size; i++) |
| 253 | seq_list->list[i] = L2CAP_SEQ_LIST_CLEAR; |
| 254 | |
| 255 | return 0; |
| 256 | } |
| 257 | |
| 258 | static inline void l2cap_seq_list_free(struct l2cap_seq_list *seq_list) |
| 259 | { |
| 260 | kfree(seq_list->list); |
| 261 | } |
| 262 | |
| 263 | static inline bool l2cap_seq_list_contains(struct l2cap_seq_list *seq_list, |
| 264 | u16 seq) |
| 265 | { |
| 266 | /* Constant-time check for list membership */ |
| 267 | return seq_list->list[seq & seq_list->mask] != L2CAP_SEQ_LIST_CLEAR; |
| 268 | } |
| 269 | |
| 270 | static u16 l2cap_seq_list_remove(struct l2cap_seq_list *seq_list, u16 seq) |
| 271 | { |
| 272 | u16 mask = seq_list->mask; |
| 273 | |
| 274 | if (seq_list->head == L2CAP_SEQ_LIST_CLEAR) { |
| 275 | /* In case someone tries to pop the head of an empty list */ |
| 276 | return L2CAP_SEQ_LIST_CLEAR; |
| 277 | } else if (seq_list->head == seq) { |
| 278 | /* Head can be removed in constant time */ |
| 279 | seq_list->head = seq_list->list[seq & mask]; |
| 280 | seq_list->list[seq & mask] = L2CAP_SEQ_LIST_CLEAR; |
| 281 | |
| 282 | if (seq_list->head == L2CAP_SEQ_LIST_TAIL) { |
| 283 | seq_list->head = L2CAP_SEQ_LIST_CLEAR; |
| 284 | seq_list->tail = L2CAP_SEQ_LIST_CLEAR; |
| 285 | } |
| 286 | } else { |
| 287 | /* Walk the list to find the sequence number */ |
| 288 | u16 prev = seq_list->head; |
| 289 | while (seq_list->list[prev & mask] != seq) { |
| 290 | prev = seq_list->list[prev & mask]; |
| 291 | if (prev == L2CAP_SEQ_LIST_TAIL) |
| 292 | return L2CAP_SEQ_LIST_CLEAR; |
| 293 | } |
| 294 | |
| 295 | /* Unlink the number from the list and clear it */ |
| 296 | seq_list->list[prev & mask] = seq_list->list[seq & mask]; |
| 297 | seq_list->list[seq & mask] = L2CAP_SEQ_LIST_CLEAR; |
| 298 | if (seq_list->tail == seq) |
| 299 | seq_list->tail = prev; |
| 300 | } |
| 301 | return seq; |
| 302 | } |
| 303 | |
| 304 | static inline u16 l2cap_seq_list_pop(struct l2cap_seq_list *seq_list) |
| 305 | { |
| 306 | /* Remove the head in constant time */ |
| 307 | return l2cap_seq_list_remove(seq_list, seq_list->head); |
| 308 | } |
| 309 | |
| 310 | static void l2cap_seq_list_clear(struct l2cap_seq_list *seq_list) |
| 311 | { |
| 312 | if (seq_list->head != L2CAP_SEQ_LIST_CLEAR) { |
| 313 | u16 i; |
| 314 | for (i = 0; i <= seq_list->mask; i++) |
| 315 | seq_list->list[i] = L2CAP_SEQ_LIST_CLEAR; |
| 316 | |
| 317 | seq_list->head = L2CAP_SEQ_LIST_CLEAR; |
| 318 | seq_list->tail = L2CAP_SEQ_LIST_CLEAR; |
| 319 | } |
| 320 | } |
| 321 | |
| 322 | static void l2cap_seq_list_append(struct l2cap_seq_list *seq_list, u16 seq) |
| 323 | { |
| 324 | u16 mask = seq_list->mask; |
| 325 | |
| 326 | /* All appends happen in constant time */ |
| 327 | |
| 328 | if (seq_list->list[seq & mask] == L2CAP_SEQ_LIST_CLEAR) { |
| 329 | if (seq_list->tail == L2CAP_SEQ_LIST_CLEAR) |
| 330 | seq_list->head = seq; |
| 331 | else |
| 332 | seq_list->list[seq_list->tail & mask] = seq; |
| 333 | |
| 334 | seq_list->tail = seq; |
| 335 | seq_list->list[seq & mask] = L2CAP_SEQ_LIST_TAIL; |
| 336 | } |
| 337 | } |
| 338 | |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 339 | static void l2cap_chan_timeout(struct work_struct *work) |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 340 | { |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 341 | struct l2cap_chan *chan = container_of(work, struct l2cap_chan, |
| 342 | chan_timer.work); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 343 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 344 | int reason; |
| 345 | |
Andrei Emeltchenko | e05dcc3 | 2012-02-17 11:40:56 +0200 | [diff] [blame] | 346 | 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] | 347 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 348 | mutex_lock(&conn->chan_lock); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 349 | l2cap_chan_lock(chan); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 350 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 351 | if (chan->state == BT_CONNECTED || chan->state == BT_CONFIG) |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 352 | reason = ECONNREFUSED; |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 353 | else if (chan->state == BT_CONNECT && |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 354 | chan->sec_level != BT_SECURITY_SDP) |
| 355 | reason = ECONNREFUSED; |
| 356 | else |
| 357 | reason = ETIMEDOUT; |
| 358 | |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 359 | l2cap_chan_close(chan, reason); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 360 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 361 | l2cap_chan_unlock(chan); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 362 | |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 363 | chan->ops->close(chan->data); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 364 | mutex_unlock(&conn->chan_lock); |
| 365 | |
Ulisses Furquim | 371fd83 | 2011-12-21 20:02:36 -0200 | [diff] [blame] | 366 | l2cap_chan_put(chan); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 367 | } |
| 368 | |
Gustavo Padovan | eef1d9b | 2012-03-25 13:59:16 -0300 | [diff] [blame] | 369 | struct l2cap_chan *l2cap_chan_create(void) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 370 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 371 | struct l2cap_chan *chan; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 372 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 373 | chan = kzalloc(sizeof(*chan), GFP_ATOMIC); |
| 374 | if (!chan) |
| 375 | return NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 376 | |
Andrei Emeltchenko | c03b355 | 2012-02-21 12:54:56 +0200 | [diff] [blame] | 377 | mutex_init(&chan->lock); |
| 378 | |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 379 | write_lock(&chan_list_lock); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 380 | list_add(&chan->global_l, &chan_list); |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 381 | write_unlock(&chan_list_lock); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 382 | |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 383 | INIT_DELAYED_WORK(&chan->chan_timer, l2cap_chan_timeout); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 384 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 385 | chan->state = BT_OPEN; |
| 386 | |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 387 | atomic_set(&chan->refcnt, 1); |
| 388 | |
Gustavo Padovan | eef1d9b | 2012-03-25 13:59:16 -0300 | [diff] [blame] | 389 | BT_DBG("chan %p", chan); |
Szymon Janc | abc545b | 2011-11-03 16:05:44 +0100 | [diff] [blame] | 390 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 391 | return chan; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 392 | } |
| 393 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 394 | void l2cap_chan_destroy(struct l2cap_chan *chan) |
Gustavo F. Padovan | 6ff5abb | 2011-04-25 15:10:41 -0300 | [diff] [blame] | 395 | { |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 396 | write_lock(&chan_list_lock); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 397 | list_del(&chan->global_l); |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 398 | write_unlock(&chan_list_lock); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 399 | |
Ulisses Furquim | 371fd83 | 2011-12-21 20:02:36 -0200 | [diff] [blame] | 400 | l2cap_chan_put(chan); |
Gustavo F. Padovan | 6ff5abb | 2011-04-25 15:10:41 -0300 | [diff] [blame] | 401 | } |
| 402 | |
Andrei Emeltchenko | bd4b165 | 2012-03-28 16:31:25 +0300 | [diff] [blame] | 403 | void l2cap_chan_set_defaults(struct l2cap_chan *chan) |
| 404 | { |
| 405 | chan->fcs = L2CAP_FCS_CRC16; |
| 406 | chan->max_tx = L2CAP_DEFAULT_MAX_TX; |
| 407 | chan->tx_win = L2CAP_DEFAULT_TX_WINDOW; |
| 408 | chan->tx_win_max = L2CAP_DEFAULT_TX_WINDOW; |
| 409 | chan->sec_level = BT_SECURITY_LOW; |
| 410 | |
| 411 | set_bit(FLAG_FORCE_ACTIVE, &chan->flags); |
| 412 | } |
| 413 | |
Andrei Emeltchenko | 14a2849 | 2012-03-23 16:31:49 +0200 | [diff] [blame] | 414 | 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] | 415 | { |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 416 | 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] | 417 | __le16_to_cpu(chan->psm), chan->dcid); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 418 | |
Andrei Emeltchenko | 9f5a0d7 | 2011-11-07 14:20:25 +0200 | [diff] [blame] | 419 | conn->disc_reason = HCI_ERROR_REMOTE_USER_TERM; |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 420 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 421 | chan->conn = conn; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 422 | |
Andrei Emeltchenko | 5491120 | 2012-02-06 15:04:00 +0200 | [diff] [blame] | 423 | switch (chan->chan_type) { |
| 424 | case L2CAP_CHAN_CONN_ORIENTED: |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 425 | if (conn->hcon->type == LE_LINK) { |
| 426 | /* LE connection */ |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 427 | chan->omtu = L2CAP_LE_DEFAULT_MTU; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 428 | chan->scid = L2CAP_CID_LE_DATA; |
| 429 | chan->dcid = L2CAP_CID_LE_DATA; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 430 | } else { |
| 431 | /* Alloc CID for connection-oriented socket */ |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 432 | chan->scid = l2cap_alloc_cid(conn); |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 433 | chan->omtu = L2CAP_DEFAULT_MTU; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 434 | } |
Andrei Emeltchenko | 5491120 | 2012-02-06 15:04:00 +0200 | [diff] [blame] | 435 | break; |
| 436 | |
| 437 | case L2CAP_CHAN_CONN_LESS: |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 438 | /* Connectionless socket */ |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 439 | chan->scid = L2CAP_CID_CONN_LESS; |
| 440 | chan->dcid = L2CAP_CID_CONN_LESS; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 441 | chan->omtu = L2CAP_DEFAULT_MTU; |
Andrei Emeltchenko | 5491120 | 2012-02-06 15:04:00 +0200 | [diff] [blame] | 442 | break; |
| 443 | |
| 444 | default: |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 445 | /* Raw socket can send/recv signalling messages only */ |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 446 | chan->scid = L2CAP_CID_SIGNALING; |
| 447 | chan->dcid = L2CAP_CID_SIGNALING; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 448 | chan->omtu = L2CAP_DEFAULT_MTU; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 449 | } |
| 450 | |
Andrei Emeltchenko | 8f7975b | 2011-10-13 16:18:54 +0300 | [diff] [blame] | 451 | chan->local_id = L2CAP_BESTEFFORT_ID; |
| 452 | chan->local_stype = L2CAP_SERV_BESTEFFORT; |
| 453 | chan->local_msdu = L2CAP_DEFAULT_MAX_SDU_SIZE; |
| 454 | chan->local_sdu_itime = L2CAP_DEFAULT_SDU_ITIME; |
| 455 | chan->local_acc_lat = L2CAP_DEFAULT_ACC_LAT; |
| 456 | chan->local_flush_to = L2CAP_DEFAULT_FLUSH_TO; |
| 457 | |
Ulisses Furquim | 371fd83 | 2011-12-21 20:02:36 -0200 | [diff] [blame] | 458 | l2cap_chan_hold(chan); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 459 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 460 | list_add(&chan->list, &conn->chan_l); |
Andrei Emeltchenko | 643162a | 2012-02-22 17:11:55 +0200 | [diff] [blame] | 461 | } |
| 462 | |
Andrei Emeltchenko | 14a2849 | 2012-03-23 16:31:49 +0200 | [diff] [blame] | 463 | 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] | 464 | { |
| 465 | mutex_lock(&conn->chan_lock); |
| 466 | __l2cap_chan_add(conn, chan); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 467 | mutex_unlock(&conn->chan_lock); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 468 | } |
| 469 | |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 470 | static void l2cap_chan_del(struct l2cap_chan *chan, int err) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 471 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 472 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 473 | struct l2cap_conn *conn = chan->conn; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 474 | struct sock *parent = bt_sk(sk)->parent; |
| 475 | |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 476 | __clear_chan_timer(chan); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 477 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 478 | BT_DBG("chan %p, conn %p, err %d", chan, conn, err); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 479 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 480 | if (conn) { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 481 | /* Delete from channel list */ |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 482 | list_del(&chan->list); |
Gustavo F. Padovan | 3d57dc6 | 2011-12-17 10:56:45 -0200 | [diff] [blame] | 483 | |
Ulisses Furquim | 371fd83 | 2011-12-21 20:02:36 -0200 | [diff] [blame] | 484 | l2cap_chan_put(chan); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 485 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 486 | chan->conn = NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 487 | hci_conn_put(conn->hcon); |
| 488 | } |
| 489 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 490 | lock_sock(sk); |
| 491 | |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 492 | __l2cap_state_change(chan, BT_CLOSED); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 493 | sock_set_flag(sk, SOCK_ZAPPED); |
| 494 | |
| 495 | if (err) |
Andrei Emeltchenko | 2e0052e | 2012-02-21 12:54:58 +0200 | [diff] [blame] | 496 | __l2cap_chan_set_err(chan, err); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 497 | |
| 498 | if (parent) { |
| 499 | bt_accept_unlink(sk); |
| 500 | parent->sk_data_ready(parent, 0); |
| 501 | } else |
| 502 | sk->sk_state_change(sk); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 503 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 504 | release_sock(sk); |
| 505 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 506 | if (!(test_bit(CONF_OUTPUT_DONE, &chan->conf_state) && |
| 507 | test_bit(CONF_INPUT_DONE, &chan->conf_state))) |
Gustavo F. Padovan | 6ff5abb | 2011-04-25 15:10:41 -0300 | [diff] [blame] | 508 | return; |
Gustavo F. Padovan | 2ead70b | 2011-04-01 15:13:36 -0300 | [diff] [blame] | 509 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 510 | skb_queue_purge(&chan->tx_q); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 511 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 512 | if (chan->mode == L2CAP_MODE_ERTM) { |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 513 | struct srej_list *l, *tmp; |
| 514 | |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 515 | __clear_retrans_timer(chan); |
| 516 | __clear_monitor_timer(chan); |
| 517 | __clear_ack_timer(chan); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 518 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 519 | skb_queue_purge(&chan->srej_q); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 520 | |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 521 | l2cap_seq_list_free(&chan->srej_list); |
| 522 | l2cap_seq_list_free(&chan->retrans_list); |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 523 | list_for_each_entry_safe(l, tmp, &chan->srej_l, list) { |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 524 | list_del(&l->list); |
| 525 | kfree(l); |
| 526 | } |
| 527 | } |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 528 | } |
| 529 | |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 530 | static void l2cap_chan_cleanup_listen(struct sock *parent) |
| 531 | { |
| 532 | struct sock *sk; |
| 533 | |
| 534 | BT_DBG("parent %p", parent); |
| 535 | |
| 536 | /* Close not yet accepted channels */ |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 537 | while ((sk = bt_accept_dequeue(parent, NULL))) { |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 538 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 539 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 540 | l2cap_chan_lock(chan); |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 541 | __clear_chan_timer(chan); |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 542 | l2cap_chan_close(chan, ECONNRESET); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 543 | l2cap_chan_unlock(chan); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 544 | |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 545 | chan->ops->close(chan->data); |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 546 | } |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 547 | } |
| 548 | |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 549 | void l2cap_chan_close(struct l2cap_chan *chan, int reason) |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 550 | { |
| 551 | struct l2cap_conn *conn = chan->conn; |
| 552 | struct sock *sk = chan->sk; |
| 553 | |
Andrei Emeltchenko | e05dcc3 | 2012-02-17 11:40:56 +0200 | [diff] [blame] | 554 | BT_DBG("chan %p state %s sk %p", chan, |
| 555 | state_to_string(chan->state), sk); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 556 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 557 | switch (chan->state) { |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 558 | case BT_LISTEN: |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 559 | lock_sock(sk); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 560 | l2cap_chan_cleanup_listen(sk); |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 561 | |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 562 | __l2cap_state_change(chan, BT_CLOSED); |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 563 | sock_set_flag(sk, SOCK_ZAPPED); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 564 | release_sock(sk); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 565 | break; |
| 566 | |
| 567 | case BT_CONNECTED: |
| 568 | case BT_CONFIG: |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 569 | if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 570 | conn->hcon->type == ACL_LINK) { |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 571 | __set_chan_timer(chan, sk->sk_sndtimeo); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 572 | l2cap_send_disconn_req(conn, chan, reason); |
| 573 | } else |
| 574 | l2cap_chan_del(chan, reason); |
| 575 | break; |
| 576 | |
| 577 | case BT_CONNECT2: |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 578 | if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 579 | conn->hcon->type == ACL_LINK) { |
| 580 | struct l2cap_conn_rsp rsp; |
| 581 | __u16 result; |
| 582 | |
| 583 | if (bt_sk(sk)->defer_setup) |
| 584 | result = L2CAP_CR_SEC_BLOCK; |
| 585 | else |
| 586 | result = L2CAP_CR_BAD_PSM; |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 587 | l2cap_state_change(chan, BT_DISCONN); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 588 | |
| 589 | rsp.scid = cpu_to_le16(chan->dcid); |
| 590 | rsp.dcid = cpu_to_le16(chan->scid); |
| 591 | rsp.result = cpu_to_le16(result); |
| 592 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 593 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, |
| 594 | sizeof(rsp), &rsp); |
| 595 | } |
| 596 | |
| 597 | l2cap_chan_del(chan, reason); |
| 598 | break; |
| 599 | |
| 600 | case BT_CONNECT: |
| 601 | case BT_DISCONN: |
| 602 | l2cap_chan_del(chan, reason); |
| 603 | break; |
| 604 | |
| 605 | default: |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 606 | lock_sock(sk); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 607 | sock_set_flag(sk, SOCK_ZAPPED); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 608 | release_sock(sk); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 609 | break; |
| 610 | } |
| 611 | } |
| 612 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 613 | static inline u8 l2cap_get_auth_type(struct l2cap_chan *chan) |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 614 | { |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 615 | if (chan->chan_type == L2CAP_CHAN_RAW) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 616 | switch (chan->sec_level) { |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 617 | case BT_SECURITY_HIGH: |
| 618 | return HCI_AT_DEDICATED_BONDING_MITM; |
| 619 | case BT_SECURITY_MEDIUM: |
| 620 | return HCI_AT_DEDICATED_BONDING; |
| 621 | default: |
| 622 | return HCI_AT_NO_BONDING; |
| 623 | } |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 624 | } else if (chan->psm == cpu_to_le16(0x0001)) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 625 | if (chan->sec_level == BT_SECURITY_LOW) |
| 626 | chan->sec_level = BT_SECURITY_SDP; |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 627 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 628 | if (chan->sec_level == BT_SECURITY_HIGH) |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 629 | return HCI_AT_NO_BONDING_MITM; |
| 630 | else |
| 631 | return HCI_AT_NO_BONDING; |
| 632 | } else { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 633 | switch (chan->sec_level) { |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 634 | case BT_SECURITY_HIGH: |
| 635 | return HCI_AT_GENERAL_BONDING_MITM; |
| 636 | case BT_SECURITY_MEDIUM: |
| 637 | return HCI_AT_GENERAL_BONDING; |
| 638 | default: |
| 639 | return HCI_AT_NO_BONDING; |
| 640 | } |
| 641 | } |
| 642 | } |
| 643 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 644 | /* Service level security */ |
Gustavo F. Padovan | d45fc42 | 2011-11-05 19:54:24 -0200 | [diff] [blame] | 645 | int l2cap_chan_check_security(struct l2cap_chan *chan) |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 646 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 647 | struct l2cap_conn *conn = chan->conn; |
Marcel Holtmann | 0684e5f | 2009-02-09 02:48:38 +0100 | [diff] [blame] | 648 | __u8 auth_type; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 649 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 650 | auth_type = l2cap_get_auth_type(chan); |
Marcel Holtmann | 0684e5f | 2009-02-09 02:48:38 +0100 | [diff] [blame] | 651 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 652 | return hci_conn_security(conn->hcon, chan->sec_level, auth_type); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 653 | } |
| 654 | |
Johannes Berg | b5ad8b7 | 2011-06-01 08:54:45 +0200 | [diff] [blame] | 655 | static u8 l2cap_get_ident(struct l2cap_conn *conn) |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 656 | { |
| 657 | u8 id; |
| 658 | |
| 659 | /* Get next available identificator. |
| 660 | * 1 - 128 are used by kernel. |
| 661 | * 129 - 199 are reserved. |
| 662 | * 200 - 254 are used by utilities like l2ping, etc. |
| 663 | */ |
| 664 | |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 665 | spin_lock(&conn->lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 666 | |
| 667 | if (++conn->tx_ident > 128) |
| 668 | conn->tx_ident = 1; |
| 669 | |
| 670 | id = conn->tx_ident; |
| 671 | |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 672 | spin_unlock(&conn->lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 673 | |
| 674 | return id; |
| 675 | } |
| 676 | |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 677 | 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] | 678 | { |
| 679 | struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 680 | u8 flags; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 681 | |
| 682 | BT_DBG("code 0x%2.2x", code); |
| 683 | |
| 684 | if (!skb) |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 685 | return; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 686 | |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 687 | if (lmp_no_flush_capable(conn->hcon->hdev)) |
| 688 | flags = ACL_START_NO_FLUSH; |
| 689 | else |
| 690 | flags = ACL_START; |
| 691 | |
Jaikumar Ganesh | 14b12d0 | 2011-05-23 18:06:04 -0700 | [diff] [blame] | 692 | bt_cb(skb)->force_active = BT_POWER_FORCE_ACTIVE_ON; |
Luiz Augusto von Dentz | 5e59b79 | 2011-11-01 10:58:57 +0200 | [diff] [blame] | 693 | skb->priority = HCI_PRIO_MAX; |
Jaikumar Ganesh | 14b12d0 | 2011-05-23 18:06:04 -0700 | [diff] [blame] | 694 | |
Luiz Augusto von Dentz | 73d80de | 2011-11-02 15:52:01 +0200 | [diff] [blame] | 695 | hci_send_acl(conn->hchan, skb, flags); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 696 | } |
| 697 | |
Luiz Augusto von Dentz | 73d80de | 2011-11-02 15:52:01 +0200 | [diff] [blame] | 698 | static void l2cap_do_send(struct l2cap_chan *chan, struct sk_buff *skb) |
| 699 | { |
| 700 | struct hci_conn *hcon = chan->conn->hcon; |
| 701 | u16 flags; |
| 702 | |
| 703 | BT_DBG("chan %p, skb %p len %d priority %u", chan, skb, skb->len, |
| 704 | skb->priority); |
| 705 | |
| 706 | if (!test_bit(FLAG_FLUSHABLE, &chan->flags) && |
| 707 | lmp_no_flush_capable(hcon->hdev)) |
| 708 | flags = ACL_START_NO_FLUSH; |
| 709 | else |
| 710 | flags = ACL_START; |
| 711 | |
| 712 | bt_cb(skb)->force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags); |
| 713 | hci_send_acl(chan->conn->hchan, skb, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | } |
| 715 | |
Mat Martineau | b5c6aae | 2012-04-25 16:36:15 -0700 | [diff] [blame] | 716 | static void __unpack_enhanced_control(u16 enh, struct l2cap_ctrl *control) |
| 717 | { |
| 718 | control->reqseq = (enh & L2CAP_CTRL_REQSEQ) >> L2CAP_CTRL_REQSEQ_SHIFT; |
| 719 | control->final = (enh & L2CAP_CTRL_FINAL) >> L2CAP_CTRL_FINAL_SHIFT; |
| 720 | |
| 721 | if (enh & L2CAP_CTRL_FRAME_TYPE) { |
| 722 | /* S-Frame */ |
| 723 | control->sframe = 1; |
| 724 | control->poll = (enh & L2CAP_CTRL_POLL) >> L2CAP_CTRL_POLL_SHIFT; |
| 725 | control->super = (enh & L2CAP_CTRL_SUPERVISE) >> L2CAP_CTRL_SUPER_SHIFT; |
| 726 | |
| 727 | control->sar = 0; |
| 728 | control->txseq = 0; |
| 729 | } else { |
| 730 | /* I-Frame */ |
| 731 | control->sframe = 0; |
| 732 | control->sar = (enh & L2CAP_CTRL_SAR) >> L2CAP_CTRL_SAR_SHIFT; |
| 733 | control->txseq = (enh & L2CAP_CTRL_TXSEQ) >> L2CAP_CTRL_TXSEQ_SHIFT; |
| 734 | |
| 735 | control->poll = 0; |
| 736 | control->super = 0; |
| 737 | } |
| 738 | } |
| 739 | |
| 740 | static void __unpack_extended_control(u32 ext, struct l2cap_ctrl *control) |
| 741 | { |
| 742 | control->reqseq = (ext & L2CAP_EXT_CTRL_REQSEQ) >> L2CAP_EXT_CTRL_REQSEQ_SHIFT; |
| 743 | control->final = (ext & L2CAP_EXT_CTRL_FINAL) >> L2CAP_EXT_CTRL_FINAL_SHIFT; |
| 744 | |
| 745 | if (ext & L2CAP_EXT_CTRL_FRAME_TYPE) { |
| 746 | /* S-Frame */ |
| 747 | control->sframe = 1; |
| 748 | control->poll = (ext & L2CAP_EXT_CTRL_POLL) >> L2CAP_EXT_CTRL_POLL_SHIFT; |
| 749 | control->super = (ext & L2CAP_EXT_CTRL_SUPERVISE) >> L2CAP_EXT_CTRL_SUPER_SHIFT; |
| 750 | |
| 751 | control->sar = 0; |
| 752 | control->txseq = 0; |
| 753 | } else { |
| 754 | /* I-Frame */ |
| 755 | control->sframe = 0; |
| 756 | control->sar = (ext & L2CAP_EXT_CTRL_SAR) >> L2CAP_EXT_CTRL_SAR_SHIFT; |
| 757 | control->txseq = (ext & L2CAP_EXT_CTRL_TXSEQ) >> L2CAP_EXT_CTRL_TXSEQ_SHIFT; |
| 758 | |
| 759 | control->poll = 0; |
| 760 | control->super = 0; |
| 761 | } |
| 762 | } |
| 763 | |
| 764 | static inline void __unpack_control(struct l2cap_chan *chan, |
| 765 | struct sk_buff *skb) |
| 766 | { |
| 767 | if (test_bit(FLAG_EXT_CTRL, &chan->flags)) { |
| 768 | __unpack_extended_control(get_unaligned_le32(skb->data), |
| 769 | &bt_cb(skb)->control); |
| 770 | } else { |
| 771 | __unpack_enhanced_control(get_unaligned_le16(skb->data), |
| 772 | &bt_cb(skb)->control); |
| 773 | } |
| 774 | } |
| 775 | |
| 776 | static u32 __pack_extended_control(struct l2cap_ctrl *control) |
| 777 | { |
| 778 | u32 packed; |
| 779 | |
| 780 | packed = control->reqseq << L2CAP_EXT_CTRL_REQSEQ_SHIFT; |
| 781 | packed |= control->final << L2CAP_EXT_CTRL_FINAL_SHIFT; |
| 782 | |
| 783 | if (control->sframe) { |
| 784 | packed |= control->poll << L2CAP_EXT_CTRL_POLL_SHIFT; |
| 785 | packed |= control->super << L2CAP_EXT_CTRL_SUPER_SHIFT; |
| 786 | packed |= L2CAP_EXT_CTRL_FRAME_TYPE; |
| 787 | } else { |
| 788 | packed |= control->sar << L2CAP_EXT_CTRL_SAR_SHIFT; |
| 789 | packed |= control->txseq << L2CAP_EXT_CTRL_TXSEQ_SHIFT; |
| 790 | } |
| 791 | |
| 792 | return packed; |
| 793 | } |
| 794 | |
| 795 | static u16 __pack_enhanced_control(struct l2cap_ctrl *control) |
| 796 | { |
| 797 | u16 packed; |
| 798 | |
| 799 | packed = control->reqseq << L2CAP_CTRL_REQSEQ_SHIFT; |
| 800 | packed |= control->final << L2CAP_CTRL_FINAL_SHIFT; |
| 801 | |
| 802 | if (control->sframe) { |
| 803 | packed |= control->poll << L2CAP_CTRL_POLL_SHIFT; |
| 804 | packed |= control->super << L2CAP_CTRL_SUPER_SHIFT; |
| 805 | packed |= L2CAP_CTRL_FRAME_TYPE; |
| 806 | } else { |
| 807 | packed |= control->sar << L2CAP_CTRL_SAR_SHIFT; |
| 808 | packed |= control->txseq << L2CAP_CTRL_TXSEQ_SHIFT; |
| 809 | } |
| 810 | |
| 811 | return packed; |
| 812 | } |
| 813 | |
| 814 | static inline void __pack_control(struct l2cap_chan *chan, |
| 815 | struct l2cap_ctrl *control, |
| 816 | struct sk_buff *skb) |
| 817 | { |
| 818 | if (test_bit(FLAG_EXT_CTRL, &chan->flags)) { |
| 819 | put_unaligned_le32(__pack_extended_control(control), |
| 820 | skb->data + L2CAP_HDR_SIZE); |
| 821 | } else { |
| 822 | put_unaligned_le16(__pack_enhanced_control(control), |
| 823 | skb->data + L2CAP_HDR_SIZE); |
| 824 | } |
| 825 | } |
| 826 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 827 | 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] | 828 | { |
| 829 | struct sk_buff *skb; |
| 830 | struct l2cap_hdr *lh; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 831 | struct l2cap_conn *conn = chan->conn; |
Andrei Emeltchenko | e4ca6d9 | 2011-10-11 13:37:52 +0300 | [diff] [blame] | 832 | int count, hlen; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 833 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 834 | if (chan->state != BT_CONNECTED) |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 835 | return; |
| 836 | |
Andrei Emeltchenko | e4ca6d9 | 2011-10-11 13:37:52 +0300 | [diff] [blame] | 837 | if (test_bit(FLAG_EXT_CTRL, &chan->flags)) |
| 838 | hlen = L2CAP_EXT_HDR_SIZE; |
| 839 | else |
| 840 | hlen = L2CAP_ENH_HDR_SIZE; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 841 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 842 | if (chan->fcs == L2CAP_FCS_CRC16) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 843 | hlen += L2CAP_FCS_SIZE; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 844 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 845 | BT_DBG("chan %p, control 0x%8.8x", chan, control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 846 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 847 | count = min_t(unsigned int, conn->mtu, hlen); |
Andrei Emeltchenko | 793c2f1 | 2011-10-11 13:37:48 +0300 | [diff] [blame] | 848 | |
| 849 | control |= __set_sframe(chan); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 850 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 851 | if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state)) |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 852 | control |= __set_ctrl_final(chan); |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 853 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 854 | if (test_and_clear_bit(CONN_SEND_PBIT, &chan->conn_state)) |
Andrei Emeltchenko | e378173 | 2011-10-11 13:37:50 +0300 | [diff] [blame] | 855 | control |= __set_ctrl_poll(chan); |
Gustavo F. Padovan | f0946cc | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 856 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 857 | skb = bt_skb_alloc(count, GFP_ATOMIC); |
| 858 | if (!skb) |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 859 | return; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 860 | |
| 861 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 862 | lh->len = cpu_to_le16(hlen - L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 863 | lh->cid = cpu_to_le16(chan->dcid); |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 864 | |
| 865 | __put_control(chan, control, skb_put(skb, __ctrl_size(chan))); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 866 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 867 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 868 | u16 fcs = crc16(0, (u8 *)lh, count - L2CAP_FCS_SIZE); |
| 869 | put_unaligned_le16(fcs, skb_put(skb, L2CAP_FCS_SIZE)); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 870 | } |
| 871 | |
Luiz Augusto von Dentz | 73d80de | 2011-11-02 15:52:01 +0200 | [diff] [blame] | 872 | skb->priority = HCI_PRIO_MAX; |
| 873 | l2cap_do_send(chan, skb); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 874 | } |
| 875 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 876 | 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] | 877 | { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 878 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 879 | control |= __set_ctrl_super(chan, L2CAP_SUPER_RNR); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 880 | set_bit(CONN_RNR_SENT, &chan->conn_state); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 881 | } else |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 882 | control |= __set_ctrl_super(chan, L2CAP_SUPER_RR); |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 883 | |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 884 | control |= __set_reqseq(chan, chan->buffer_seq); |
Gustavo F. Padovan | 2ab25cd | 2009-10-03 02:34:40 -0300 | [diff] [blame] | 885 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 886 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 887 | } |
| 888 | |
Gustavo F. Padovan | b445003 | 2011-04-12 18:15:09 -0300 | [diff] [blame] | 889 | static inline int __l2cap_no_conn_pending(struct l2cap_chan *chan) |
Andrei Emeltchenko | e501d05 | 2010-07-08 12:14:41 +0300 | [diff] [blame] | 890 | { |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 891 | return !test_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Andrei Emeltchenko | e501d05 | 2010-07-08 12:14:41 +0300 | [diff] [blame] | 892 | } |
| 893 | |
Andrei Emeltchenko | 9b27f35 | 2012-02-24 16:00:00 +0200 | [diff] [blame] | 894 | static void l2cap_send_conn_req(struct l2cap_chan *chan) |
| 895 | { |
| 896 | struct l2cap_conn *conn = chan->conn; |
| 897 | struct l2cap_conn_req req; |
| 898 | |
| 899 | req.scid = cpu_to_le16(chan->scid); |
| 900 | req.psm = chan->psm; |
| 901 | |
| 902 | chan->ident = l2cap_get_ident(conn); |
| 903 | |
| 904 | set_bit(CONF_CONNECT_PEND, &chan->conf_state); |
| 905 | |
| 906 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_REQ, sizeof(req), &req); |
| 907 | } |
| 908 | |
Vinicius Costa Gomes | 9f0caeb | 2012-04-20 15:46:08 -0300 | [diff] [blame] | 909 | static void l2cap_chan_ready(struct l2cap_chan *chan) |
| 910 | { |
| 911 | struct sock *sk = chan->sk; |
| 912 | struct sock *parent; |
| 913 | |
| 914 | lock_sock(sk); |
| 915 | |
| 916 | parent = bt_sk(sk)->parent; |
| 917 | |
| 918 | BT_DBG("sk %p, parent %p", sk, parent); |
| 919 | |
| 920 | chan->conf_state = 0; |
| 921 | __clear_chan_timer(chan); |
| 922 | |
| 923 | __l2cap_state_change(chan, BT_CONNECTED); |
| 924 | sk->sk_state_change(sk); |
| 925 | |
| 926 | if (parent) |
| 927 | parent->sk_data_ready(parent, 0); |
| 928 | |
| 929 | release_sock(sk); |
| 930 | } |
| 931 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 932 | static void l2cap_do_start(struct l2cap_chan *chan) |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 933 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 934 | struct l2cap_conn *conn = chan->conn; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 935 | |
Vinicius Costa Gomes | 9f0caeb | 2012-04-20 15:46:08 -0300 | [diff] [blame] | 936 | if (conn->hcon->type == LE_LINK) { |
| 937 | l2cap_chan_ready(chan); |
| 938 | return; |
| 939 | } |
| 940 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 941 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) { |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 942 | if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)) |
| 943 | return; |
| 944 | |
Gustavo F. Padovan | d45fc42 | 2011-11-05 19:54:24 -0200 | [diff] [blame] | 945 | if (l2cap_chan_check_security(chan) && |
Andrei Emeltchenko | 9b27f35 | 2012-02-24 16:00:00 +0200 | [diff] [blame] | 946 | __l2cap_no_conn_pending(chan)) |
| 947 | l2cap_send_conn_req(chan); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 948 | } else { |
| 949 | struct l2cap_info_req req; |
| 950 | req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 951 | |
| 952 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; |
| 953 | conn->info_ident = l2cap_get_ident(conn); |
| 954 | |
Marcel Holtmann | ba13ccd | 2012-03-01 14:25:33 -0800 | [diff] [blame] | 955 | schedule_delayed_work(&conn->info_timer, L2CAP_INFO_TIMEOUT); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 956 | |
| 957 | l2cap_send_cmd(conn, conn->info_ident, |
| 958 | L2CAP_INFO_REQ, sizeof(req), &req); |
| 959 | } |
| 960 | } |
| 961 | |
Gustavo F. Padovan | cf6c2c0 | 2010-06-07 20:54:45 -0300 | [diff] [blame] | 962 | static inline int l2cap_mode_supported(__u8 mode, __u32 feat_mask) |
| 963 | { |
| 964 | u32 local_feat_mask = l2cap_feat_mask; |
Gustavo F. Padovan | d1c4a17 | 2010-07-18 16:25:54 -0300 | [diff] [blame] | 965 | if (!disable_ertm) |
Gustavo F. Padovan | cf6c2c0 | 2010-06-07 20:54:45 -0300 | [diff] [blame] | 966 | local_feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING; |
| 967 | |
| 968 | switch (mode) { |
| 969 | case L2CAP_MODE_ERTM: |
| 970 | return L2CAP_FEAT_ERTM & feat_mask & local_feat_mask; |
| 971 | case L2CAP_MODE_STREAMING: |
| 972 | return L2CAP_FEAT_STREAMING & feat_mask & local_feat_mask; |
| 973 | default: |
| 974 | return 0x00; |
| 975 | } |
| 976 | } |
| 977 | |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 978 | 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] | 979 | { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 980 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 981 | struct l2cap_disconn_req req; |
| 982 | |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 983 | if (!conn) |
| 984 | return; |
| 985 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 986 | if (chan->mode == L2CAP_MODE_ERTM) { |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 987 | __clear_retrans_timer(chan); |
| 988 | __clear_monitor_timer(chan); |
| 989 | __clear_ack_timer(chan); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 990 | } |
| 991 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 992 | req.dcid = cpu_to_le16(chan->dcid); |
| 993 | req.scid = cpu_to_le16(chan->scid); |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 994 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
| 995 | L2CAP_DISCONN_REQ, sizeof(req), &req); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 996 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 997 | lock_sock(sk); |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 998 | __l2cap_state_change(chan, BT_DISCONN); |
Andrei Emeltchenko | 2e0052e | 2012-02-21 12:54:58 +0200 | [diff] [blame] | 999 | __l2cap_chan_set_err(chan, err); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1000 | release_sock(sk); |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 1001 | } |
| 1002 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | /* ---- L2CAP connections ---- */ |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1004 | static void l2cap_conn_start(struct l2cap_conn *conn) |
| 1005 | { |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1006 | struct l2cap_chan *chan, *tmp; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1007 | |
| 1008 | BT_DBG("conn %p", conn); |
| 1009 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1010 | mutex_lock(&conn->chan_lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1011 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1012 | list_for_each_entry_safe(chan, tmp, &conn->chan_l, list) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1013 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1014 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1015 | l2cap_chan_lock(chan); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1016 | |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 1017 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1018 | l2cap_chan_unlock(chan); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1019 | continue; |
| 1020 | } |
| 1021 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1022 | if (chan->state == BT_CONNECT) { |
Gustavo F. Padovan | d45fc42 | 2011-11-05 19:54:24 -0200 | [diff] [blame] | 1023 | if (!l2cap_chan_check_security(chan) || |
Gustavo F. Padovan | b445003 | 2011-04-12 18:15:09 -0300 | [diff] [blame] | 1024 | !__l2cap_no_conn_pending(chan)) { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1025 | l2cap_chan_unlock(chan); |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 1026 | continue; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 1027 | } |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 1028 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 1029 | if (!l2cap_mode_supported(chan->mode, conn->feat_mask) |
| 1030 | && test_bit(CONF_STATE2_DEVICE, |
| 1031 | &chan->conf_state)) { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1032 | l2cap_chan_close(chan, ECONNRESET); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1033 | l2cap_chan_unlock(chan); |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 1034 | continue; |
| 1035 | } |
| 1036 | |
Andrei Emeltchenko | 9b27f35 | 2012-02-24 16:00:00 +0200 | [diff] [blame] | 1037 | l2cap_send_conn_req(chan); |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 1038 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1039 | } else if (chan->state == BT_CONNECT2) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1040 | struct l2cap_conn_rsp rsp; |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 1041 | char buf[128]; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1042 | rsp.scid = cpu_to_le16(chan->dcid); |
| 1043 | rsp.dcid = cpu_to_le16(chan->scid); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1044 | |
Gustavo F. Padovan | d45fc42 | 2011-11-05 19:54:24 -0200 | [diff] [blame] | 1045 | if (l2cap_chan_check_security(chan)) { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1046 | lock_sock(sk); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 1047 | if (bt_sk(sk)->defer_setup) { |
| 1048 | struct sock *parent = bt_sk(sk)->parent; |
| 1049 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); |
| 1050 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHOR_PEND); |
Ilia Kolomisnky | 05e9a2f | 2011-07-15 18:30:21 +0000 | [diff] [blame] | 1051 | if (parent) |
| 1052 | parent->sk_data_ready(parent, 0); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 1053 | |
| 1054 | } else { |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 1055 | __l2cap_state_change(chan, BT_CONFIG); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 1056 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); |
| 1057 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 1058 | } |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1059 | release_sock(sk); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1060 | } else { |
| 1061 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); |
| 1062 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHEN_PEND); |
| 1063 | } |
| 1064 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 1065 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, |
| 1066 | sizeof(rsp), &rsp); |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 1067 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 1068 | if (test_bit(CONF_REQ_SENT, &chan->conf_state) || |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 1069 | rsp.result != L2CAP_CR_SUCCESS) { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1070 | l2cap_chan_unlock(chan); |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 1071 | continue; |
| 1072 | } |
| 1073 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 1074 | set_bit(CONF_REQ_SENT, &chan->conf_state); |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 1075 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 1076 | l2cap_build_conf_req(chan, buf), buf); |
| 1077 | chan->num_conf_req++; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1078 | } |
| 1079 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1080 | l2cap_chan_unlock(chan); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1081 | } |
| 1082 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1083 | mutex_unlock(&conn->chan_lock); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1084 | } |
| 1085 | |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1086 | /* Find socket with cid and source/destination bdaddr. |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1087 | * Returns closest match, locked. |
| 1088 | */ |
Andrei Emeltchenko | d9b8870 | 2012-03-12 12:13:08 +0200 | [diff] [blame] | 1089 | 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] | 1090 | bdaddr_t *src, |
| 1091 | bdaddr_t *dst) |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1092 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1093 | struct l2cap_chan *c, *c1 = NULL; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1094 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1095 | read_lock(&chan_list_lock); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1096 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1097 | list_for_each_entry(c, &chan_list, global_l) { |
| 1098 | struct sock *sk = c->sk; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1099 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1100 | if (state && c->state != state) |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1101 | continue; |
| 1102 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1103 | if (c->scid == cid) { |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1104 | int src_match, dst_match; |
| 1105 | int src_any, dst_any; |
| 1106 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1107 | /* Exact match. */ |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1108 | src_match = !bacmp(&bt_sk(sk)->src, src); |
| 1109 | dst_match = !bacmp(&bt_sk(sk)->dst, dst); |
| 1110 | if (src_match && dst_match) { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1111 | read_unlock(&chan_list_lock); |
| 1112 | return c; |
| 1113 | } |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1114 | |
| 1115 | /* Closest match */ |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1116 | src_any = !bacmp(&bt_sk(sk)->src, BDADDR_ANY); |
| 1117 | dst_any = !bacmp(&bt_sk(sk)->dst, BDADDR_ANY); |
| 1118 | if ((src_match && dst_any) || (src_any && dst_match) || |
| 1119 | (src_any && dst_any)) |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1120 | c1 = c; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1121 | } |
| 1122 | } |
Gustavo F. Padovan | 280f294 | 2011-04-13 19:01:22 -0300 | [diff] [blame] | 1123 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1124 | read_unlock(&chan_list_lock); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1125 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1126 | return c1; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1127 | } |
| 1128 | |
| 1129 | static void l2cap_le_conn_ready(struct l2cap_conn *conn) |
| 1130 | { |
Gustavo F. Padovan | c916fbe | 2011-04-04 16:00:55 -0300 | [diff] [blame] | 1131 | struct sock *parent, *sk; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1132 | struct l2cap_chan *chan, *pchan; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1133 | |
| 1134 | BT_DBG(""); |
| 1135 | |
| 1136 | /* Check if we have socket listening on cid */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1137 | pchan = l2cap_global_chan_by_scid(BT_LISTEN, L2CAP_CID_LE_DATA, |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1138 | conn->src, conn->dst); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1139 | if (!pchan) |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1140 | return; |
| 1141 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1142 | parent = pchan->sk; |
| 1143 | |
Gustavo F. Padovan | aa2ac88 | 2011-06-24 01:53:01 -0300 | [diff] [blame] | 1144 | lock_sock(parent); |
Gustavo F. Padovan | 62f3a2c | 2011-04-14 18:34:34 -0300 | [diff] [blame] | 1145 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1146 | /* Check for backlog size */ |
| 1147 | if (sk_acceptq_is_full(parent)) { |
| 1148 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
| 1149 | goto clean; |
| 1150 | } |
| 1151 | |
Gustavo F. Padovan | 80808e4 | 2011-05-16 17:24:37 -0300 | [diff] [blame] | 1152 | chan = pchan->ops->new_connection(pchan->data); |
| 1153 | if (!chan) |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1154 | goto clean; |
| 1155 | |
Gustavo F. Padovan | 80808e4 | 2011-05-16 17:24:37 -0300 | [diff] [blame] | 1156 | sk = chan->sk; |
Gustavo F. Padovan | 5d41ce1 | 2011-04-08 15:40:02 -0300 | [diff] [blame] | 1157 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1158 | hci_conn_hold(conn->hcon); |
| 1159 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1160 | bacpy(&bt_sk(sk)->src, conn->src); |
| 1161 | bacpy(&bt_sk(sk)->dst, conn->dst); |
| 1162 | |
Gustavo F. Padovan | d101024 | 2011-03-25 00:39:48 -0300 | [diff] [blame] | 1163 | bt_accept_enqueue(parent, sk); |
| 1164 | |
Gustavo F. Padovan | 3d57dc6 | 2011-12-17 10:56:45 -0200 | [diff] [blame] | 1165 | l2cap_chan_add(conn, chan); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1166 | |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 1167 | __set_chan_timer(chan, sk->sk_sndtimeo); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1168 | |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 1169 | __l2cap_state_change(chan, BT_CONNECTED); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1170 | parent->sk_data_ready(parent, 0); |
| 1171 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1172 | clean: |
Gustavo F. Padovan | aa2ac88 | 2011-06-24 01:53:01 -0300 | [diff] [blame] | 1173 | release_sock(parent); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1174 | } |
| 1175 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1176 | static void l2cap_conn_ready(struct l2cap_conn *conn) |
| 1177 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1178 | struct l2cap_chan *chan; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1179 | |
| 1180 | BT_DBG("conn %p", conn); |
| 1181 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1182 | if (!conn->hcon->out && conn->hcon->type == LE_LINK) |
| 1183 | l2cap_le_conn_ready(conn); |
| 1184 | |
Vinicius Costa Gomes | 160dc6a | 2011-08-19 21:06:55 -0300 | [diff] [blame] | 1185 | if (conn->hcon->out && conn->hcon->type == LE_LINK) |
| 1186 | smp_conn_security(conn, conn->hcon->pending_sec_level); |
| 1187 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1188 | mutex_lock(&conn->chan_lock); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1189 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1190 | list_for_each_entry(chan, &conn->chan_l, list) { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1191 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1192 | l2cap_chan_lock(chan); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1193 | |
Vinicius Costa Gomes | 6312845 | 2011-06-17 22:46:26 -0300 | [diff] [blame] | 1194 | if (conn->hcon->type == LE_LINK) { |
Anderson Briglia | b501d6a | 2011-06-07 18:46:31 -0300 | [diff] [blame] | 1195 | if (smp_conn_security(conn, chan->sec_level)) |
Andrei Emeltchenko | cf4cd00 | 2012-02-06 15:03:59 +0200 | [diff] [blame] | 1196 | l2cap_chan_ready(chan); |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 1197 | |
Vinicius Costa Gomes | 6312845 | 2011-06-17 22:46:26 -0300 | [diff] [blame] | 1198 | } else if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1199 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 1200 | __clear_chan_timer(chan); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1201 | lock_sock(sk); |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 1202 | __l2cap_state_change(chan, BT_CONNECTED); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1203 | sk->sk_state_change(sk); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1204 | release_sock(sk); |
Anderson Briglia | b501d6a | 2011-06-07 18:46:31 -0300 | [diff] [blame] | 1205 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1206 | } else if (chan->state == BT_CONNECT) |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 1207 | l2cap_do_start(chan); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1208 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1209 | l2cap_chan_unlock(chan); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1210 | } |
| 1211 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1212 | mutex_unlock(&conn->chan_lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1213 | } |
| 1214 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1215 | /* Notify sockets that we cannot guaranty reliability anymore */ |
| 1216 | static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) |
| 1217 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1218 | struct l2cap_chan *chan; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1219 | |
| 1220 | BT_DBG("conn %p", conn); |
| 1221 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1222 | mutex_lock(&conn->chan_lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1223 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1224 | list_for_each_entry(chan, &conn->chan_l, list) { |
Andrei Emeltchenko | ecf61bd | 2011-10-11 14:04:32 +0300 | [diff] [blame] | 1225 | if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags)) |
Andrei Emeltchenko | 2e0052e | 2012-02-21 12:54:58 +0200 | [diff] [blame] | 1226 | __l2cap_chan_set_err(chan, err); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1227 | } |
| 1228 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1229 | mutex_unlock(&conn->chan_lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1230 | } |
| 1231 | |
Gustavo F. Padovan | f878fca | 2011-12-15 01:16:14 -0200 | [diff] [blame] | 1232 | static void l2cap_info_timeout(struct work_struct *work) |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1233 | { |
Gustavo F. Padovan | f878fca | 2011-12-15 01:16:14 -0200 | [diff] [blame] | 1234 | struct l2cap_conn *conn = container_of(work, struct l2cap_conn, |
Gustavo F. Padovan | 030013d | 2011-12-20 10:57:28 -0200 | [diff] [blame] | 1235 | info_timer.work); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1236 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 1237 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 1238 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 1239 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1240 | l2cap_conn_start(conn); |
| 1241 | } |
| 1242 | |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1243 | static void l2cap_conn_del(struct hci_conn *hcon, int err) |
| 1244 | { |
| 1245 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 1246 | struct l2cap_chan *chan, *l; |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1247 | |
| 1248 | if (!conn) |
| 1249 | return; |
| 1250 | |
| 1251 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); |
| 1252 | |
| 1253 | kfree_skb(conn->rx_skb); |
| 1254 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1255 | mutex_lock(&conn->chan_lock); |
| 1256 | |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1257 | /* Kill channels */ |
| 1258 | list_for_each_entry_safe(chan, l, &conn->chan_l, list) { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1259 | l2cap_chan_lock(chan); |
| 1260 | |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1261 | l2cap_chan_del(chan, err); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1262 | |
| 1263 | l2cap_chan_unlock(chan); |
| 1264 | |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1265 | chan->ops->close(chan->data); |
| 1266 | } |
| 1267 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1268 | mutex_unlock(&conn->chan_lock); |
| 1269 | |
Luiz Augusto von Dentz | 73d80de | 2011-11-02 15:52:01 +0200 | [diff] [blame] | 1270 | hci_chan_del(conn->hchan); |
| 1271 | |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1272 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) |
Ulisses Furquim | 127074b | 2012-01-30 18:26:29 -0200 | [diff] [blame] | 1273 | cancel_delayed_work_sync(&conn->info_timer); |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1274 | |
Johan Hedberg | 51a8efd | 2012-01-16 06:10:31 +0200 | [diff] [blame] | 1275 | if (test_and_clear_bit(HCI_CONN_LE_SMP_PEND, &hcon->flags)) { |
Ulisses Furquim | 127074b | 2012-01-30 18:26:29 -0200 | [diff] [blame] | 1276 | cancel_delayed_work_sync(&conn->security_timer); |
Vinicius Costa Gomes | 8aab475 | 2011-09-05 14:31:31 -0300 | [diff] [blame] | 1277 | smp_chan_destroy(conn); |
Vinicius Costa Gomes | d26a234 | 2011-08-19 21:06:51 -0300 | [diff] [blame] | 1278 | } |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1279 | |
| 1280 | hcon->l2cap_data = NULL; |
| 1281 | kfree(conn); |
| 1282 | } |
| 1283 | |
Gustavo F. Padovan | 6c9d42a | 2011-12-20 10:57:27 -0200 | [diff] [blame] | 1284 | static void security_timeout(struct work_struct *work) |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1285 | { |
Gustavo F. Padovan | 6c9d42a | 2011-12-20 10:57:27 -0200 | [diff] [blame] | 1286 | struct l2cap_conn *conn = container_of(work, struct l2cap_conn, |
| 1287 | security_timer.work); |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1288 | |
| 1289 | l2cap_conn_del(conn->hcon, ETIMEDOUT); |
| 1290 | } |
| 1291 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) |
| 1293 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 1294 | struct l2cap_conn *conn = hcon->l2cap_data; |
Luiz Augusto von Dentz | 73d80de | 2011-11-02 15:52:01 +0200 | [diff] [blame] | 1295 | struct hci_chan *hchan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 1297 | if (conn || status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1298 | return conn; |
| 1299 | |
Luiz Augusto von Dentz | 73d80de | 2011-11-02 15:52:01 +0200 | [diff] [blame] | 1300 | hchan = hci_chan_create(hcon); |
| 1301 | if (!hchan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1302 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | |
Luiz Augusto von Dentz | 73d80de | 2011-11-02 15:52:01 +0200 | [diff] [blame] | 1304 | conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC); |
| 1305 | if (!conn) { |
| 1306 | hci_chan_del(hchan); |
| 1307 | return NULL; |
| 1308 | } |
| 1309 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | hcon->l2cap_data = conn; |
| 1311 | conn->hcon = hcon; |
Luiz Augusto von Dentz | 73d80de | 2011-11-02 15:52:01 +0200 | [diff] [blame] | 1312 | conn->hchan = hchan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1313 | |
Luiz Augusto von Dentz | 73d80de | 2011-11-02 15:52:01 +0200 | [diff] [blame] | 1314 | BT_DBG("hcon %p conn %p hchan %p", hcon, conn, hchan); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 1315 | |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 1316 | if (hcon->hdev->le_mtu && hcon->type == LE_LINK) |
| 1317 | conn->mtu = hcon->hdev->le_mtu; |
| 1318 | else |
| 1319 | conn->mtu = hcon->hdev->acl_mtu; |
| 1320 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1321 | conn->src = &hcon->hdev->bdaddr; |
| 1322 | conn->dst = &hcon->dst; |
| 1323 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1324 | conn->feat_mask = 0; |
| 1325 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | spin_lock_init(&conn->lock); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1327 | mutex_init(&conn->chan_lock); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1328 | |
| 1329 | INIT_LIST_HEAD(&conn->chan_l); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1330 | |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1331 | if (hcon->type == LE_LINK) |
Gustavo F. Padovan | 6c9d42a | 2011-12-20 10:57:27 -0200 | [diff] [blame] | 1332 | INIT_DELAYED_WORK(&conn->security_timer, security_timeout); |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1333 | else |
Gustavo F. Padovan | 030013d | 2011-12-20 10:57:28 -0200 | [diff] [blame] | 1334 | INIT_DELAYED_WORK(&conn->info_timer, l2cap_info_timeout); |
Dave Young | 45054dc | 2009-10-18 20:28:30 +0000 | [diff] [blame] | 1335 | |
Andrei Emeltchenko | 9f5a0d7 | 2011-11-07 14:20:25 +0200 | [diff] [blame] | 1336 | conn->disc_reason = HCI_ERROR_REMOTE_USER_TERM; |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 1337 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | return conn; |
| 1339 | } |
| 1340 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1341 | /* ---- Socket interface ---- */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1342 | |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1343 | /* Find socket with psm and source / destination bdaddr. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1344 | * Returns closest match. |
| 1345 | */ |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1346 | static struct l2cap_chan *l2cap_global_chan_by_psm(int state, __le16 psm, |
| 1347 | bdaddr_t *src, |
| 1348 | bdaddr_t *dst) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1349 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1350 | struct l2cap_chan *c, *c1 = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1352 | read_lock(&chan_list_lock); |
Gustavo F. Padovan | e0f0cb5 | 2010-11-01 18:43:53 +0000 | [diff] [blame] | 1353 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1354 | list_for_each_entry(c, &chan_list, global_l) { |
| 1355 | struct sock *sk = c->sk; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1356 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1357 | if (state && c->state != state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | continue; |
| 1359 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1360 | if (c->psm == psm) { |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1361 | int src_match, dst_match; |
| 1362 | int src_any, dst_any; |
| 1363 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1364 | /* Exact match. */ |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1365 | src_match = !bacmp(&bt_sk(sk)->src, src); |
| 1366 | dst_match = !bacmp(&bt_sk(sk)->dst, dst); |
| 1367 | if (src_match && dst_match) { |
Johannes Berg | a7567b2 | 2011-06-01 08:29:54 +0200 | [diff] [blame] | 1368 | read_unlock(&chan_list_lock); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1369 | return c; |
| 1370 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | |
| 1372 | /* Closest match */ |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1373 | src_any = !bacmp(&bt_sk(sk)->src, BDADDR_ANY); |
| 1374 | dst_any = !bacmp(&bt_sk(sk)->dst, BDADDR_ANY); |
| 1375 | if ((src_match && dst_any) || (src_any && dst_match) || |
| 1376 | (src_any && dst_any)) |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1377 | c1 = c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1378 | } |
| 1379 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1380 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1381 | read_unlock(&chan_list_lock); |
Gustavo F. Padovan | e0f0cb5 | 2010-11-01 18:43:53 +0000 | [diff] [blame] | 1382 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1383 | return c1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1384 | } |
| 1385 | |
Andre Guedes | 8e9f989 | 2012-04-24 21:02:55 -0300 | [diff] [blame] | 1386 | int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid, |
| 1387 | bdaddr_t *dst, u8 dst_type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1388 | { |
Gustavo F. Padovan | 5d41ce1 | 2011-04-08 15:40:02 -0300 | [diff] [blame] | 1389 | struct sock *sk = chan->sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1390 | bdaddr_t *src = &bt_sk(sk)->src; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | struct l2cap_conn *conn; |
| 1392 | struct hci_conn *hcon; |
| 1393 | struct hci_dev *hdev; |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 1394 | __u8 auth_type; |
Marcel Holtmann | 44d0e48 | 2009-04-20 07:09:16 +0200 | [diff] [blame] | 1395 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1396 | |
Andre Guedes | 8e9f989 | 2012-04-24 21:02:55 -0300 | [diff] [blame] | 1397 | BT_DBG("%s -> %s (type %u) psm 0x%2.2x", batostr(src), batostr(dst), |
| 1398 | dst_type, __le16_to_cpu(chan->psm)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1399 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 1400 | hdev = hci_get_route(dst, src); |
| 1401 | if (!hdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1402 | return -EHOSTUNREACH; |
| 1403 | |
Gustavo F. Padovan | 09fd0de | 2011-06-17 13:03:21 -0300 | [diff] [blame] | 1404 | hci_dev_lock(hdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1405 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1406 | l2cap_chan_lock(chan); |
Gustavo F. Padovan | 03a0019 | 2011-12-09 04:48:17 -0200 | [diff] [blame] | 1407 | |
| 1408 | /* PSM must be odd and lsb of upper byte must be 0 */ |
| 1409 | if ((__le16_to_cpu(psm) & 0x0101) != 0x0001 && !cid && |
| 1410 | chan->chan_type != L2CAP_CHAN_RAW) { |
| 1411 | err = -EINVAL; |
| 1412 | goto done; |
| 1413 | } |
| 1414 | |
| 1415 | if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && !(psm || cid)) { |
| 1416 | err = -EINVAL; |
| 1417 | goto done; |
| 1418 | } |
| 1419 | |
| 1420 | switch (chan->mode) { |
| 1421 | case L2CAP_MODE_BASIC: |
| 1422 | break; |
| 1423 | case L2CAP_MODE_ERTM: |
| 1424 | case L2CAP_MODE_STREAMING: |
| 1425 | if (!disable_ertm) |
| 1426 | break; |
| 1427 | /* fall through */ |
| 1428 | default: |
| 1429 | err = -ENOTSUPP; |
| 1430 | goto done; |
| 1431 | } |
| 1432 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1433 | lock_sock(sk); |
| 1434 | |
Gustavo F. Padovan | 03a0019 | 2011-12-09 04:48:17 -0200 | [diff] [blame] | 1435 | switch (sk->sk_state) { |
| 1436 | case BT_CONNECT: |
| 1437 | case BT_CONNECT2: |
| 1438 | case BT_CONFIG: |
| 1439 | /* Already connecting */ |
| 1440 | err = 0; |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1441 | release_sock(sk); |
Gustavo F. Padovan | 03a0019 | 2011-12-09 04:48:17 -0200 | [diff] [blame] | 1442 | goto done; |
| 1443 | |
| 1444 | case BT_CONNECTED: |
| 1445 | /* Already connected */ |
| 1446 | err = -EISCONN; |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1447 | release_sock(sk); |
Gustavo F. Padovan | 03a0019 | 2011-12-09 04:48:17 -0200 | [diff] [blame] | 1448 | goto done; |
| 1449 | |
| 1450 | case BT_OPEN: |
| 1451 | case BT_BOUND: |
| 1452 | /* Can connect */ |
| 1453 | break; |
| 1454 | |
| 1455 | default: |
| 1456 | err = -EBADFD; |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1457 | release_sock(sk); |
Gustavo F. Padovan | 03a0019 | 2011-12-09 04:48:17 -0200 | [diff] [blame] | 1458 | goto done; |
| 1459 | } |
| 1460 | |
| 1461 | /* Set destination address and psm */ |
Gustavo F. Padovan | 9219b2a | 2012-01-02 20:08:04 -0200 | [diff] [blame] | 1462 | bacpy(&bt_sk(sk)->dst, dst); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1463 | |
| 1464 | release_sock(sk); |
| 1465 | |
Gustavo F. Padovan | 03a0019 | 2011-12-09 04:48:17 -0200 | [diff] [blame] | 1466 | chan->psm = psm; |
| 1467 | chan->dcid = cid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1468 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1469 | auth_type = l2cap_get_auth_type(chan); |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 1470 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1471 | if (chan->dcid == L2CAP_CID_LE_DATA) |
Andre Guedes | 8e9f989 | 2012-04-24 21:02:55 -0300 | [diff] [blame] | 1472 | hcon = hci_connect(hdev, LE_LINK, dst, dst_type, |
Andre Guedes | b12f62c | 2012-04-24 21:02:54 -0300 | [diff] [blame] | 1473 | chan->sec_level, auth_type); |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 1474 | else |
Andre Guedes | 8e9f989 | 2012-04-24 21:02:55 -0300 | [diff] [blame] | 1475 | hcon = hci_connect(hdev, ACL_LINK, dst, dst_type, |
Andre Guedes | b12f62c | 2012-04-24 21:02:54 -0300 | [diff] [blame] | 1476 | chan->sec_level, auth_type); |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 1477 | |
Ville Tervo | 30e7627 | 2011-02-22 16:10:53 -0300 | [diff] [blame] | 1478 | if (IS_ERR(hcon)) { |
| 1479 | err = PTR_ERR(hcon); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1480 | goto done; |
Ville Tervo | 30e7627 | 2011-02-22 16:10:53 -0300 | [diff] [blame] | 1481 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1482 | |
| 1483 | conn = l2cap_conn_add(hcon, 0); |
| 1484 | if (!conn) { |
| 1485 | hci_conn_put(hcon); |
Ville Tervo | 30e7627 | 2011-02-22 16:10:53 -0300 | [diff] [blame] | 1486 | err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1487 | goto done; |
| 1488 | } |
| 1489 | |
Vinicius Costa Gomes | 9f0caeb | 2012-04-20 15:46:08 -0300 | [diff] [blame] | 1490 | if (hcon->type == LE_LINK) { |
| 1491 | err = 0; |
| 1492 | |
| 1493 | if (!list_empty(&conn->chan_l)) { |
| 1494 | err = -EBUSY; |
| 1495 | hci_conn_put(hcon); |
| 1496 | } |
| 1497 | |
| 1498 | if (err) |
| 1499 | goto done; |
| 1500 | } |
| 1501 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1502 | /* Update source addr of the socket */ |
| 1503 | bacpy(src, conn->src); |
| 1504 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1505 | l2cap_chan_unlock(chan); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1506 | l2cap_chan_add(conn, chan); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1507 | l2cap_chan_lock(chan); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1508 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1509 | l2cap_state_change(chan, BT_CONNECT); |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 1510 | __set_chan_timer(chan, sk->sk_sndtimeo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1511 | |
| 1512 | if (hcon->state == BT_CONNECTED) { |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 1513 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 1514 | __clear_chan_timer(chan); |
Gustavo F. Padovan | d45fc42 | 2011-11-05 19:54:24 -0200 | [diff] [blame] | 1515 | if (l2cap_chan_check_security(chan)) |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1516 | l2cap_state_change(chan, BT_CONNECTED); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1517 | } else |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 1518 | l2cap_do_start(chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1519 | } |
| 1520 | |
Ville Tervo | 30e7627 | 2011-02-22 16:10:53 -0300 | [diff] [blame] | 1521 | err = 0; |
| 1522 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1523 | done: |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1524 | l2cap_chan_unlock(chan); |
Gustavo F. Padovan | 09fd0de | 2011-06-17 13:03:21 -0300 | [diff] [blame] | 1525 | hci_dev_unlock(hdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1526 | hci_dev_put(hdev); |
| 1527 | return err; |
| 1528 | } |
| 1529 | |
Gustavo F. Padovan | dcba0db | 2011-02-04 03:08:36 -0200 | [diff] [blame] | 1530 | int __l2cap_wait_ack(struct sock *sk) |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1531 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1532 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1533 | DECLARE_WAITQUEUE(wait, current); |
| 1534 | int err = 0; |
| 1535 | int timeo = HZ/5; |
| 1536 | |
Marcel Holtmann | 2b0b05d | 2010-05-10 11:33:10 +0200 | [diff] [blame] | 1537 | add_wait_queue(sk_sleep(sk), &wait); |
Peter Hurley | a71a0cf | 2011-07-25 18:36:26 -0400 | [diff] [blame] | 1538 | set_current_state(TASK_INTERRUPTIBLE); |
| 1539 | while (chan->unacked_frames > 0 && chan->conn) { |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1540 | if (!timeo) |
| 1541 | timeo = HZ/5; |
| 1542 | |
| 1543 | if (signal_pending(current)) { |
| 1544 | err = sock_intr_errno(timeo); |
| 1545 | break; |
| 1546 | } |
| 1547 | |
| 1548 | release_sock(sk); |
| 1549 | timeo = schedule_timeout(timeo); |
| 1550 | lock_sock(sk); |
Peter Hurley | a71a0cf | 2011-07-25 18:36:26 -0400 | [diff] [blame] | 1551 | set_current_state(TASK_INTERRUPTIBLE); |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1552 | |
| 1553 | err = sock_error(sk); |
| 1554 | if (err) |
| 1555 | break; |
| 1556 | } |
| 1557 | set_current_state(TASK_RUNNING); |
Marcel Holtmann | 2b0b05d | 2010-05-10 11:33:10 +0200 | [diff] [blame] | 1558 | remove_wait_queue(sk_sleep(sk), &wait); |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1559 | return err; |
| 1560 | } |
| 1561 | |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 1562 | static void l2cap_monitor_timeout(struct work_struct *work) |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1563 | { |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 1564 | struct l2cap_chan *chan = container_of(work, struct l2cap_chan, |
| 1565 | monitor_timer.work); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1566 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1567 | BT_DBG("chan %p", chan); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 1568 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1569 | l2cap_chan_lock(chan); |
| 1570 | |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1571 | if (chan->retry_count >= chan->remote_max_tx) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1572 | l2cap_send_disconn_req(chan->conn, chan, ECONNABORTED); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1573 | l2cap_chan_unlock(chan); |
Andrei Emeltchenko | 8d7e1c7 | 2012-03-23 09:42:15 +0200 | [diff] [blame] | 1574 | l2cap_chan_put(chan); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1575 | return; |
| 1576 | } |
| 1577 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1578 | chan->retry_count++; |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 1579 | __set_monitor_timer(chan); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1580 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1581 | l2cap_send_rr_or_rnr(chan, L2CAP_CTRL_POLL); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1582 | l2cap_chan_unlock(chan); |
Andrei Emeltchenko | 8d7e1c7 | 2012-03-23 09:42:15 +0200 | [diff] [blame] | 1583 | l2cap_chan_put(chan); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1584 | } |
| 1585 | |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 1586 | static void l2cap_retrans_timeout(struct work_struct *work) |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1587 | { |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 1588 | struct l2cap_chan *chan = container_of(work, struct l2cap_chan, |
| 1589 | retrans_timer.work); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1590 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 1591 | BT_DBG("chan %p", chan); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 1592 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1593 | l2cap_chan_lock(chan); |
| 1594 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1595 | chan->retry_count = 1; |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 1596 | __set_monitor_timer(chan); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1597 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1598 | set_bit(CONN_WAIT_F, &chan->conn_state); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1599 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1600 | l2cap_send_rr_or_rnr(chan, L2CAP_CTRL_POLL); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1601 | |
| 1602 | l2cap_chan_unlock(chan); |
Andrei Emeltchenko | 8d7e1c7 | 2012-03-23 09:42:15 +0200 | [diff] [blame] | 1603 | l2cap_chan_put(chan); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1604 | } |
| 1605 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1606 | static void l2cap_drop_acked_frames(struct l2cap_chan *chan) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1607 | { |
| 1608 | struct sk_buff *skb; |
| 1609 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1610 | while ((skb = skb_peek(&chan->tx_q)) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1611 | chan->unacked_frames) { |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 1612 | if (bt_cb(skb)->control.txseq == chan->expected_ack_seq) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1613 | break; |
| 1614 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1615 | skb = skb_dequeue(&chan->tx_q); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1616 | kfree_skb(skb); |
| 1617 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1618 | chan->unacked_frames--; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1619 | } |
| 1620 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1621 | if (!chan->unacked_frames) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 1622 | __clear_retrans_timer(chan); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1623 | } |
| 1624 | |
Szymon Janc | 67c9e84 | 2011-07-28 16:24:33 +0200 | [diff] [blame] | 1625 | static void l2cap_streaming_send(struct l2cap_chan *chan) |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1626 | { |
Gustavo F. Padovan | ccbb84a | 2010-08-30 18:44:44 -0300 | [diff] [blame] | 1627 | struct sk_buff *skb; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1628 | u32 control; |
| 1629 | u16 fcs; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1630 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1631 | while ((skb = skb_dequeue(&chan->tx_q))) { |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1632 | control = __get_control(chan, skb->data + L2CAP_HDR_SIZE); |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 1633 | control |= __set_txseq(chan, chan->next_tx_seq); |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1634 | __put_control(chan, control, skb->data + L2CAP_HDR_SIZE); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1635 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1636 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 1637 | fcs = crc16(0, (u8 *)skb->data, |
| 1638 | skb->len - L2CAP_FCS_SIZE); |
| 1639 | put_unaligned_le16(fcs, |
| 1640 | skb->data + skb->len - L2CAP_FCS_SIZE); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1641 | } |
| 1642 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1643 | l2cap_do_send(chan, skb); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1644 | |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 1645 | chan->next_tx_seq = __next_seq(chan, chan->next_tx_seq); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1646 | } |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1647 | } |
| 1648 | |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 1649 | 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] | 1650 | { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1651 | struct sk_buff *skb, *tx_skb; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1652 | u16 fcs; |
| 1653 | u32 control; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1654 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1655 | skb = skb_peek(&chan->tx_q); |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1656 | if (!skb) |
| 1657 | return; |
| 1658 | |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 1659 | while (bt_cb(skb)->control.txseq != tx_seq) { |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1660 | if (skb_queue_is_last(&chan->tx_q, skb)) |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1661 | return; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1662 | |
Szymon Janc | d1726b6 | 2011-11-16 09:32:20 +0100 | [diff] [blame] | 1663 | skb = skb_queue_next(&chan->tx_q, skb); |
| 1664 | } |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1665 | |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 1666 | if (bt_cb(skb)->control.retries == chan->remote_max_tx && |
| 1667 | chan->remote_max_tx) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1668 | l2cap_send_disconn_req(chan->conn, chan, ECONNABORTED); |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1669 | return; |
| 1670 | } |
| 1671 | |
| 1672 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 1673 | bt_cb(skb)->control.retries++; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1674 | |
| 1675 | control = __get_control(chan, tx_skb->data + L2CAP_HDR_SIZE); |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 1676 | control &= __get_sar_mask(chan); |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 1677 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1678 | if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state)) |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 1679 | control |= __set_ctrl_final(chan); |
Gustavo F. Padovan | 95ffa97 | 2010-06-18 20:37:33 -0300 | [diff] [blame] | 1680 | |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 1681 | control |= __set_reqseq(chan, chan->buffer_seq); |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 1682 | control |= __set_txseq(chan, tx_seq); |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 1683 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1684 | __put_control(chan, control, tx_skb->data + L2CAP_HDR_SIZE); |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1685 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1686 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 1687 | fcs = crc16(0, (u8 *)tx_skb->data, |
| 1688 | tx_skb->len - L2CAP_FCS_SIZE); |
| 1689 | put_unaligned_le16(fcs, |
| 1690 | tx_skb->data + tx_skb->len - L2CAP_FCS_SIZE); |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1691 | } |
| 1692 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1693 | l2cap_do_send(chan, tx_skb); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1694 | } |
| 1695 | |
Szymon Janc | 67c9e84 | 2011-07-28 16:24:33 +0200 | [diff] [blame] | 1696 | static int l2cap_ertm_send(struct l2cap_chan *chan) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1697 | { |
| 1698 | struct sk_buff *skb, *tx_skb; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1699 | u16 fcs; |
| 1700 | u32 control; |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1701 | int nsent = 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1702 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1703 | if (chan->state != BT_CONNECTED) |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 1704 | return -ENOTCONN; |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1705 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1706 | while ((skb = chan->tx_send_head) && (!l2cap_tx_window_full(chan))) { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1707 | |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 1708 | if (bt_cb(skb)->control.retries == chan->remote_max_tx && |
| 1709 | chan->remote_max_tx) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1710 | l2cap_send_disconn_req(chan->conn, chan, ECONNABORTED); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1711 | break; |
| 1712 | } |
| 1713 | |
Andrei Emeltchenko | e420aba | 2009-12-23 13:07:14 +0200 | [diff] [blame] | 1714 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
| 1715 | |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 1716 | bt_cb(skb)->control.retries++; |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1717 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1718 | control = __get_control(chan, tx_skb->data + L2CAP_HDR_SIZE); |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 1719 | control &= __get_sar_mask(chan); |
Gustavo F. Padovan | 95ffa97 | 2010-06-18 20:37:33 -0300 | [diff] [blame] | 1720 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1721 | if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state)) |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 1722 | control |= __set_ctrl_final(chan); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1723 | |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 1724 | control |= __set_reqseq(chan, chan->buffer_seq); |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 1725 | control |= __set_txseq(chan, chan->next_tx_seq); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1726 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1727 | __put_control(chan, control, tx_skb->data + L2CAP_HDR_SIZE); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1728 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1729 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 1730 | fcs = crc16(0, (u8 *)skb->data, |
| 1731 | tx_skb->len - L2CAP_FCS_SIZE); |
| 1732 | put_unaligned_le16(fcs, skb->data + |
| 1733 | tx_skb->len - L2CAP_FCS_SIZE); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1734 | } |
| 1735 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1736 | l2cap_do_send(chan, tx_skb); |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1737 | |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 1738 | __set_retrans_timer(chan); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1739 | |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 1740 | bt_cb(skb)->control.txseq = chan->next_tx_seq; |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 1741 | |
| 1742 | chan->next_tx_seq = __next_seq(chan, chan->next_tx_seq); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1743 | |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 1744 | if (bt_cb(skb)->control.retries == 1) { |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1745 | chan->unacked_frames++; |
Szymon Janc | 930fa4a | 2012-02-07 15:43:02 +0100 | [diff] [blame] | 1746 | |
| 1747 | if (!nsent++) |
| 1748 | __clear_ack_timer(chan); |
Szymon Janc | 8ed7a0a | 2012-02-07 15:43:01 +0100 | [diff] [blame] | 1749 | } |
Suraj Sumangala | 23e9fde | 2011-03-09 14:44:05 +0530 | [diff] [blame] | 1750 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1751 | chan->frames_sent++; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1752 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1753 | if (skb_queue_is_last(&chan->tx_q, skb)) |
| 1754 | chan->tx_send_head = NULL; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1755 | else |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1756 | chan->tx_send_head = skb_queue_next(&chan->tx_q, skb); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1757 | } |
| 1758 | |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1759 | return nsent; |
| 1760 | } |
| 1761 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1762 | static int l2cap_retransmit_frames(struct l2cap_chan *chan) |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1763 | { |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1764 | int ret; |
| 1765 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1766 | if (!skb_queue_empty(&chan->tx_q)) |
| 1767 | chan->tx_send_head = chan->tx_q.next; |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1768 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1769 | chan->next_tx_seq = chan->expected_ack_seq; |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1770 | ret = l2cap_ertm_send(chan); |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1771 | return ret; |
| 1772 | } |
| 1773 | |
Szymon Janc | b17e73b | 2012-01-11 10:59:47 +0100 | [diff] [blame] | 1774 | static void __l2cap_send_ack(struct l2cap_chan *chan) |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1775 | { |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1776 | u32 control = 0; |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1777 | |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 1778 | control |= __set_reqseq(chan, chan->buffer_seq); |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1779 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1780 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 1781 | control |= __set_ctrl_super(chan, L2CAP_SUPER_RNR); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1782 | set_bit(CONN_RNR_SENT, &chan->conn_state); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1783 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1784 | return; |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1785 | } |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1786 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1787 | if (l2cap_ertm_send(chan) > 0) |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1788 | return; |
| 1789 | |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 1790 | control |= __set_ctrl_super(chan, L2CAP_SUPER_RR); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1791 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1792 | } |
| 1793 | |
Szymon Janc | b17e73b | 2012-01-11 10:59:47 +0100 | [diff] [blame] | 1794 | static void l2cap_send_ack(struct l2cap_chan *chan) |
| 1795 | { |
| 1796 | __clear_ack_timer(chan); |
| 1797 | __l2cap_send_ack(chan); |
| 1798 | } |
| 1799 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1800 | static void l2cap_send_srejtail(struct l2cap_chan *chan) |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 1801 | { |
| 1802 | struct srej_list *tail; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1803 | u32 control; |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 1804 | |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 1805 | control = __set_ctrl_super(chan, L2CAP_SUPER_SREJ); |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 1806 | control |= __set_ctrl_final(chan); |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 1807 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 1808 | tail = list_entry((&chan->srej_l)->prev, struct srej_list, list); |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 1809 | control |= __set_reqseq(chan, tail->tx_seq); |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 1810 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1811 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 1812 | } |
| 1813 | |
Gustavo F. Padovan | 0412468 | 2012-03-08 01:25:00 -0300 | [diff] [blame] | 1814 | static inline int l2cap_skbuff_fromiovec(struct l2cap_chan *chan, |
| 1815 | struct msghdr *msg, int len, |
| 1816 | int count, struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1817 | { |
Andrei Emeltchenko | 0952a57 | 2012-01-13 17:21:43 +0200 | [diff] [blame] | 1818 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1819 | struct sk_buff **frag; |
Gustavo Padovan | 9033894 | 2012-04-06 20:15:47 -0300 | [diff] [blame] | 1820 | int sent = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1821 | |
Gustavo F. Padovan | 59203a2 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1822 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1823 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1824 | |
| 1825 | sent += count; |
| 1826 | len -= count; |
| 1827 | |
| 1828 | /* Continuation fragments (no L2CAP header) */ |
| 1829 | frag = &skb_shinfo(skb)->frag_list; |
| 1830 | while (len) { |
| 1831 | count = min_t(unsigned int, conn->mtu, len); |
| 1832 | |
Andrei Emeltchenko | 2f7719c | 2012-01-20 14:08:03 +0200 | [diff] [blame] | 1833 | *frag = chan->ops->alloc_skb(chan, count, |
Gustavo Padovan | 9033894 | 2012-04-06 20:15:47 -0300 | [diff] [blame] | 1834 | msg->msg_flags & MSG_DONTWAIT); |
Andrei Emeltchenko | 2f7719c | 2012-01-20 14:08:03 +0200 | [diff] [blame] | 1835 | |
Gustavo Padovan | 9033894 | 2012-04-06 20:15:47 -0300 | [diff] [blame] | 1836 | if (IS_ERR(*frag)) |
| 1837 | return PTR_ERR(*frag); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1838 | if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) |
| 1839 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1840 | |
Luiz Augusto von Dentz | 5e59b79 | 2011-11-01 10:58:57 +0200 | [diff] [blame] | 1841 | (*frag)->priority = skb->priority; |
| 1842 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1843 | sent += count; |
| 1844 | len -= count; |
| 1845 | |
| 1846 | frag = &(*frag)->next; |
| 1847 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1848 | |
| 1849 | return sent; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1850 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1851 | |
Luiz Augusto von Dentz | 5e59b79 | 2011-11-01 10:58:57 +0200 | [diff] [blame] | 1852 | static struct sk_buff *l2cap_create_connless_pdu(struct l2cap_chan *chan, |
| 1853 | struct msghdr *msg, size_t len, |
| 1854 | u32 priority) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1855 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1856 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1857 | struct sk_buff *skb; |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 1858 | int err, count, hlen = L2CAP_HDR_SIZE + L2CAP_PSMLEN_SIZE; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1859 | struct l2cap_hdr *lh; |
| 1860 | |
Andrei Emeltchenko | 6d5922b | 2012-02-06 15:04:01 +0200 | [diff] [blame] | 1861 | 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] | 1862 | |
| 1863 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
Andrei Emeltchenko | 2f7719c | 2012-01-20 14:08:03 +0200 | [diff] [blame] | 1864 | |
| 1865 | skb = chan->ops->alloc_skb(chan, count + hlen, |
Gustavo Padovan | 9033894 | 2012-04-06 20:15:47 -0300 | [diff] [blame] | 1866 | msg->msg_flags & MSG_DONTWAIT); |
| 1867 | if (IS_ERR(skb)) |
| 1868 | return skb; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1869 | |
Luiz Augusto von Dentz | 5e59b79 | 2011-11-01 10:58:57 +0200 | [diff] [blame] | 1870 | skb->priority = priority; |
| 1871 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1872 | /* Create L2CAP header */ |
| 1873 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1874 | lh->cid = cpu_to_le16(chan->dcid); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1875 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); |
Andrei Emeltchenko | 097db76 | 2012-03-09 14:16:17 +0200 | [diff] [blame] | 1876 | put_unaligned(chan->psm, skb_put(skb, 2)); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1877 | |
Andrei Emeltchenko | 0952a57 | 2012-01-13 17:21:43 +0200 | [diff] [blame] | 1878 | err = l2cap_skbuff_fromiovec(chan, msg, len, count, skb); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1879 | if (unlikely(err < 0)) { |
| 1880 | kfree_skb(skb); |
| 1881 | return ERR_PTR(err); |
| 1882 | } |
| 1883 | return skb; |
| 1884 | } |
| 1885 | |
Luiz Augusto von Dentz | 5e59b79 | 2011-11-01 10:58:57 +0200 | [diff] [blame] | 1886 | static struct sk_buff *l2cap_create_basic_pdu(struct l2cap_chan *chan, |
| 1887 | struct msghdr *msg, size_t len, |
| 1888 | u32 priority) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1889 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1890 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1891 | struct sk_buff *skb; |
| 1892 | int err, count, hlen = L2CAP_HDR_SIZE; |
| 1893 | struct l2cap_hdr *lh; |
| 1894 | |
Andrei Emeltchenko | 6d5922b | 2012-02-06 15:04:01 +0200 | [diff] [blame] | 1895 | BT_DBG("chan %p len %d", chan, (int)len); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1896 | |
| 1897 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
Andrei Emeltchenko | 2f7719c | 2012-01-20 14:08:03 +0200 | [diff] [blame] | 1898 | |
| 1899 | skb = chan->ops->alloc_skb(chan, count + hlen, |
Gustavo Padovan | 9033894 | 2012-04-06 20:15:47 -0300 | [diff] [blame] | 1900 | msg->msg_flags & MSG_DONTWAIT); |
| 1901 | if (IS_ERR(skb)) |
| 1902 | return skb; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1903 | |
Luiz Augusto von Dentz | 5e59b79 | 2011-11-01 10:58:57 +0200 | [diff] [blame] | 1904 | skb->priority = priority; |
| 1905 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1906 | /* Create L2CAP header */ |
| 1907 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1908 | lh->cid = cpu_to_le16(chan->dcid); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1909 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); |
| 1910 | |
Andrei Emeltchenko | 0952a57 | 2012-01-13 17:21:43 +0200 | [diff] [blame] | 1911 | err = l2cap_skbuff_fromiovec(chan, msg, len, count, skb); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1912 | if (unlikely(err < 0)) { |
| 1913 | kfree_skb(skb); |
| 1914 | return ERR_PTR(err); |
| 1915 | } |
| 1916 | return skb; |
| 1917 | } |
| 1918 | |
Luiz Augusto von Dentz | ab0ff76 | 2011-09-12 20:00:50 +0300 | [diff] [blame] | 1919 | static struct sk_buff *l2cap_create_iframe_pdu(struct l2cap_chan *chan, |
| 1920 | struct msghdr *msg, size_t len, |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1921 | u32 control, u16 sdulen) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1922 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1923 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1924 | struct sk_buff *skb; |
Andrei Emeltchenko | e4ca6d9 | 2011-10-11 13:37:52 +0300 | [diff] [blame] | 1925 | int err, count, hlen; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1926 | struct l2cap_hdr *lh; |
| 1927 | |
Andrei Emeltchenko | 6d5922b | 2012-02-06 15:04:01 +0200 | [diff] [blame] | 1928 | BT_DBG("chan %p len %d", chan, (int)len); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1929 | |
Gustavo F. Padovan | 0ee0d20 | 2010-05-01 16:15:41 -0300 | [diff] [blame] | 1930 | if (!conn) |
| 1931 | return ERR_PTR(-ENOTCONN); |
| 1932 | |
Andrei Emeltchenko | e4ca6d9 | 2011-10-11 13:37:52 +0300 | [diff] [blame] | 1933 | if (test_bit(FLAG_EXT_CTRL, &chan->flags)) |
| 1934 | hlen = L2CAP_EXT_HDR_SIZE; |
| 1935 | else |
| 1936 | hlen = L2CAP_ENH_HDR_SIZE; |
| 1937 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1938 | if (sdulen) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 1939 | hlen += L2CAP_SDULEN_SIZE; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1940 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1941 | if (chan->fcs == L2CAP_FCS_CRC16) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 1942 | hlen += L2CAP_FCS_SIZE; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1943 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1944 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
Andrei Emeltchenko | 2f7719c | 2012-01-20 14:08:03 +0200 | [diff] [blame] | 1945 | |
| 1946 | skb = chan->ops->alloc_skb(chan, count + hlen, |
Gustavo Padovan | 9033894 | 2012-04-06 20:15:47 -0300 | [diff] [blame] | 1947 | msg->msg_flags & MSG_DONTWAIT); |
| 1948 | if (IS_ERR(skb)) |
| 1949 | return skb; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1950 | |
| 1951 | /* Create L2CAP header */ |
| 1952 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1953 | lh->cid = cpu_to_le16(chan->dcid); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1954 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1955 | |
| 1956 | __put_control(chan, control, skb_put(skb, __ctrl_size(chan))); |
| 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 | put_unaligned_le16(sdulen, skb_put(skb, L2CAP_SDULEN_SIZE)); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1960 | |
Andrei Emeltchenko | 0952a57 | 2012-01-13 17:21:43 +0200 | [diff] [blame] | 1961 | err = l2cap_skbuff_fromiovec(chan, msg, len, count, skb); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1962 | if (unlikely(err < 0)) { |
| 1963 | kfree_skb(skb); |
| 1964 | return ERR_PTR(err); |
| 1965 | } |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1966 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1967 | if (chan->fcs == L2CAP_FCS_CRC16) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 1968 | put_unaligned_le16(0, skb_put(skb, L2CAP_FCS_SIZE)); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1969 | |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 1970 | bt_cb(skb)->control.retries = 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1971 | return skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1972 | } |
| 1973 | |
Szymon Janc | 67c9e84 | 2011-07-28 16:24:33 +0200 | [diff] [blame] | 1974 | static int l2cap_sar_segment_sdu(struct l2cap_chan *chan, struct msghdr *msg, size_t len) |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1975 | { |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1976 | struct sk_buff *skb; |
| 1977 | struct sk_buff_head sar_queue; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1978 | u32 control; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1979 | size_t size = 0; |
| 1980 | |
Gustavo F. Padovan | ff12fd6 | 2010-05-05 22:09:15 -0300 | [diff] [blame] | 1981 | skb_queue_head_init(&sar_queue); |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 1982 | control = __set_ctrl_sar(chan, L2CAP_SAR_START); |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1983 | skb = l2cap_create_iframe_pdu(chan, msg, chan->remote_mps, control, len); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1984 | if (IS_ERR(skb)) |
| 1985 | return PTR_ERR(skb); |
| 1986 | |
| 1987 | __skb_queue_tail(&sar_queue, skb); |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1988 | len -= chan->remote_mps; |
| 1989 | size += chan->remote_mps; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1990 | |
| 1991 | while (len > 0) { |
| 1992 | size_t buflen; |
| 1993 | |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1994 | if (len > chan->remote_mps) { |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 1995 | control = __set_ctrl_sar(chan, L2CAP_SAR_CONTINUE); |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1996 | buflen = chan->remote_mps; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1997 | } else { |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 1998 | control = __set_ctrl_sar(chan, L2CAP_SAR_END); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1999 | buflen = len; |
| 2000 | } |
| 2001 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2002 | skb = l2cap_create_iframe_pdu(chan, msg, buflen, control, 0); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2003 | if (IS_ERR(skb)) { |
| 2004 | skb_queue_purge(&sar_queue); |
| 2005 | return PTR_ERR(skb); |
| 2006 | } |
| 2007 | |
| 2008 | __skb_queue_tail(&sar_queue, skb); |
| 2009 | len -= buflen; |
| 2010 | size += buflen; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2011 | } |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 2012 | skb_queue_splice_tail(&sar_queue, &chan->tx_q); |
| 2013 | if (chan->tx_send_head == NULL) |
| 2014 | chan->tx_send_head = sar_queue.next; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2015 | |
| 2016 | return size; |
| 2017 | } |
| 2018 | |
Luiz Augusto von Dentz | 5e59b79 | 2011-11-01 10:58:57 +0200 | [diff] [blame] | 2019 | int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len, |
| 2020 | u32 priority) |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 2021 | { |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 2022 | struct sk_buff *skb; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 2023 | u32 control; |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 2024 | int err; |
| 2025 | |
| 2026 | /* Connectionless channel */ |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 2027 | if (chan->chan_type == L2CAP_CHAN_CONN_LESS) { |
Luiz Augusto von Dentz | 5e59b79 | 2011-11-01 10:58:57 +0200 | [diff] [blame] | 2028 | skb = l2cap_create_connless_pdu(chan, msg, len, priority); |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 2029 | if (IS_ERR(skb)) |
| 2030 | return PTR_ERR(skb); |
| 2031 | |
| 2032 | l2cap_do_send(chan, skb); |
| 2033 | return len; |
| 2034 | } |
| 2035 | |
| 2036 | switch (chan->mode) { |
| 2037 | case L2CAP_MODE_BASIC: |
| 2038 | /* Check outgoing MTU */ |
| 2039 | if (len > chan->omtu) |
| 2040 | return -EMSGSIZE; |
| 2041 | |
| 2042 | /* Create a basic PDU */ |
Luiz Augusto von Dentz | 5e59b79 | 2011-11-01 10:58:57 +0200 | [diff] [blame] | 2043 | skb = l2cap_create_basic_pdu(chan, msg, len, priority); |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 2044 | if (IS_ERR(skb)) |
| 2045 | return PTR_ERR(skb); |
| 2046 | |
| 2047 | l2cap_do_send(chan, skb); |
| 2048 | err = len; |
| 2049 | break; |
| 2050 | |
| 2051 | case L2CAP_MODE_ERTM: |
| 2052 | case L2CAP_MODE_STREAMING: |
| 2053 | /* Entire SDU fits into one PDU */ |
| 2054 | if (len <= chan->remote_mps) { |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 2055 | control = __set_ctrl_sar(chan, L2CAP_SAR_UNSEGMENTED); |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 2056 | skb = l2cap_create_iframe_pdu(chan, msg, len, control, |
| 2057 | 0); |
| 2058 | if (IS_ERR(skb)) |
| 2059 | return PTR_ERR(skb); |
| 2060 | |
| 2061 | __skb_queue_tail(&chan->tx_q, skb); |
| 2062 | |
| 2063 | if (chan->tx_send_head == NULL) |
| 2064 | chan->tx_send_head = skb; |
| 2065 | |
| 2066 | } else { |
| 2067 | /* Segment SDU into multiples PDUs */ |
| 2068 | err = l2cap_sar_segment_sdu(chan, msg, len); |
| 2069 | if (err < 0) |
| 2070 | return err; |
| 2071 | } |
| 2072 | |
| 2073 | if (chan->mode == L2CAP_MODE_STREAMING) { |
| 2074 | l2cap_streaming_send(chan); |
| 2075 | err = len; |
| 2076 | break; |
| 2077 | } |
| 2078 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 2079 | if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state) && |
| 2080 | test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 2081 | err = len; |
| 2082 | break; |
| 2083 | } |
| 2084 | |
| 2085 | err = l2cap_ertm_send(chan); |
| 2086 | if (err >= 0) |
| 2087 | err = len; |
| 2088 | |
| 2089 | break; |
| 2090 | |
| 2091 | default: |
| 2092 | BT_DBG("bad state %1.1x", chan->mode); |
| 2093 | err = -EBADFD; |
| 2094 | } |
| 2095 | |
| 2096 | return err; |
| 2097 | } |
| 2098 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2099 | /* Copy frame to all raw sockets on that connection */ |
| 2100 | static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) |
| 2101 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2102 | struct sk_buff *nskb; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2103 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2104 | |
| 2105 | BT_DBG("conn %p", conn); |
| 2106 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 2107 | mutex_lock(&conn->chan_lock); |
Gustavo F. Padovan | 3d57dc6 | 2011-12-17 10:56:45 -0200 | [diff] [blame] | 2108 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 2109 | list_for_each_entry(chan, &conn->chan_l, list) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2110 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 2111 | if (chan->chan_type != L2CAP_CHAN_RAW) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2112 | continue; |
| 2113 | |
| 2114 | /* Don't send frame to the socket it came from */ |
| 2115 | if (skb->sk == sk) |
| 2116 | continue; |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2117 | nskb = skb_clone(skb, GFP_ATOMIC); |
| 2118 | if (!nskb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2119 | continue; |
| 2120 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 2121 | if (chan->ops->recv(chan->data, nskb)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2122 | kfree_skb(nskb); |
| 2123 | } |
Gustavo F. Padovan | 3d57dc6 | 2011-12-17 10:56:45 -0200 | [diff] [blame] | 2124 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 2125 | mutex_unlock(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2126 | } |
| 2127 | |
| 2128 | /* ---- L2CAP signalling commands ---- */ |
| 2129 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, |
| 2130 | u8 code, u8 ident, u16 dlen, void *data) |
| 2131 | { |
| 2132 | struct sk_buff *skb, **frag; |
| 2133 | struct l2cap_cmd_hdr *cmd; |
| 2134 | struct l2cap_hdr *lh; |
| 2135 | int len, count; |
| 2136 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2137 | BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", |
| 2138 | conn, code, ident, dlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2139 | |
| 2140 | len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; |
| 2141 | count = min_t(unsigned int, conn->mtu, len); |
| 2142 | |
| 2143 | skb = bt_skb_alloc(count, GFP_ATOMIC); |
| 2144 | if (!skb) |
| 2145 | return NULL; |
| 2146 | |
| 2147 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2148 | lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 2149 | |
| 2150 | if (conn->hcon->type == LE_LINK) |
| 2151 | lh->cid = cpu_to_le16(L2CAP_CID_LE_SIGNALING); |
| 2152 | else |
| 2153 | lh->cid = cpu_to_le16(L2CAP_CID_SIGNALING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2154 | |
| 2155 | cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); |
| 2156 | cmd->code = code; |
| 2157 | cmd->ident = ident; |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2158 | cmd->len = cpu_to_le16(dlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2159 | |
| 2160 | if (dlen) { |
| 2161 | count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; |
| 2162 | memcpy(skb_put(skb, count), data, count); |
| 2163 | data += count; |
| 2164 | } |
| 2165 | |
| 2166 | len -= skb->len; |
| 2167 | |
| 2168 | /* Continuation fragments (no L2CAP header) */ |
| 2169 | frag = &skb_shinfo(skb)->frag_list; |
| 2170 | while (len) { |
| 2171 | count = min_t(unsigned int, conn->mtu, len); |
| 2172 | |
| 2173 | *frag = bt_skb_alloc(count, GFP_ATOMIC); |
| 2174 | if (!*frag) |
| 2175 | goto fail; |
| 2176 | |
| 2177 | memcpy(skb_put(*frag, count), data, count); |
| 2178 | |
| 2179 | len -= count; |
| 2180 | data += count; |
| 2181 | |
| 2182 | frag = &(*frag)->next; |
| 2183 | } |
| 2184 | |
| 2185 | return skb; |
| 2186 | |
| 2187 | fail: |
| 2188 | kfree_skb(skb); |
| 2189 | return NULL; |
| 2190 | } |
| 2191 | |
| 2192 | static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) |
| 2193 | { |
| 2194 | struct l2cap_conf_opt *opt = *ptr; |
| 2195 | int len; |
| 2196 | |
| 2197 | len = L2CAP_CONF_OPT_SIZE + opt->len; |
| 2198 | *ptr += len; |
| 2199 | |
| 2200 | *type = opt->type; |
| 2201 | *olen = opt->len; |
| 2202 | |
| 2203 | switch (opt->len) { |
| 2204 | case 1: |
| 2205 | *val = *((u8 *) opt->val); |
| 2206 | break; |
| 2207 | |
| 2208 | case 2: |
steven miao | bfaaeb3 | 2010-10-16 18:29:47 -0400 | [diff] [blame] | 2209 | *val = get_unaligned_le16(opt->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2210 | break; |
| 2211 | |
| 2212 | case 4: |
steven miao | bfaaeb3 | 2010-10-16 18:29:47 -0400 | [diff] [blame] | 2213 | *val = get_unaligned_le32(opt->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2214 | break; |
| 2215 | |
| 2216 | default: |
| 2217 | *val = (unsigned long) opt->val; |
| 2218 | break; |
| 2219 | } |
| 2220 | |
| 2221 | BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val); |
| 2222 | return len; |
| 2223 | } |
| 2224 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2225 | static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) |
| 2226 | { |
| 2227 | struct l2cap_conf_opt *opt = *ptr; |
| 2228 | |
| 2229 | BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val); |
| 2230 | |
| 2231 | opt->type = type; |
| 2232 | opt->len = len; |
| 2233 | |
| 2234 | switch (len) { |
| 2235 | case 1: |
| 2236 | *((u8 *) opt->val) = val; |
| 2237 | break; |
| 2238 | |
| 2239 | case 2: |
Gustavo F. Padovan | 4f8b691 | 2010-10-18 14:25:53 -0200 | [diff] [blame] | 2240 | put_unaligned_le16(val, opt->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2241 | break; |
| 2242 | |
| 2243 | case 4: |
Gustavo F. Padovan | 4f8b691 | 2010-10-18 14:25:53 -0200 | [diff] [blame] | 2244 | put_unaligned_le32(val, opt->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2245 | break; |
| 2246 | |
| 2247 | default: |
| 2248 | memcpy(opt->val, (void *) val, len); |
| 2249 | break; |
| 2250 | } |
| 2251 | |
| 2252 | *ptr += L2CAP_CONF_OPT_SIZE + len; |
| 2253 | } |
| 2254 | |
Andrei Emeltchenko | f89cef0 | 2011-10-13 16:18:55 +0300 | [diff] [blame] | 2255 | static void l2cap_add_opt_efs(void **ptr, struct l2cap_chan *chan) |
| 2256 | { |
| 2257 | struct l2cap_conf_efs efs; |
| 2258 | |
Szymon Janc | 1ec918c | 2011-11-16 09:32:21 +0100 | [diff] [blame] | 2259 | switch (chan->mode) { |
Andrei Emeltchenko | f89cef0 | 2011-10-13 16:18:55 +0300 | [diff] [blame] | 2260 | case L2CAP_MODE_ERTM: |
| 2261 | efs.id = chan->local_id; |
| 2262 | efs.stype = chan->local_stype; |
| 2263 | efs.msdu = cpu_to_le16(chan->local_msdu); |
| 2264 | efs.sdu_itime = cpu_to_le32(chan->local_sdu_itime); |
| 2265 | efs.acc_lat = cpu_to_le32(L2CAP_DEFAULT_ACC_LAT); |
| 2266 | efs.flush_to = cpu_to_le32(L2CAP_DEFAULT_FLUSH_TO); |
| 2267 | break; |
| 2268 | |
| 2269 | case L2CAP_MODE_STREAMING: |
| 2270 | efs.id = 1; |
| 2271 | efs.stype = L2CAP_SERV_BESTEFFORT; |
| 2272 | efs.msdu = cpu_to_le16(chan->local_msdu); |
| 2273 | efs.sdu_itime = cpu_to_le32(chan->local_sdu_itime); |
| 2274 | efs.acc_lat = 0; |
| 2275 | efs.flush_to = 0; |
| 2276 | break; |
| 2277 | |
| 2278 | default: |
| 2279 | return; |
| 2280 | } |
| 2281 | |
| 2282 | l2cap_add_conf_opt(ptr, L2CAP_CONF_EFS, sizeof(efs), |
| 2283 | (unsigned long) &efs); |
| 2284 | } |
| 2285 | |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 2286 | static void l2cap_ack_timeout(struct work_struct *work) |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2287 | { |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 2288 | struct l2cap_chan *chan = container_of(work, struct l2cap_chan, |
| 2289 | ack_timer.work); |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2290 | |
Gustavo F. Padovan | 2fb9b3d | 2011-12-22 16:56:05 -0200 | [diff] [blame] | 2291 | BT_DBG("chan %p", chan); |
| 2292 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 2293 | l2cap_chan_lock(chan); |
| 2294 | |
Szymon Janc | b17e73b | 2012-01-11 10:59:47 +0100 | [diff] [blame] | 2295 | __l2cap_send_ack(chan); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 2296 | |
| 2297 | l2cap_chan_unlock(chan); |
Szymon Janc | 09bfb2e | 2012-01-11 10:59:49 +0100 | [diff] [blame] | 2298 | |
| 2299 | l2cap_chan_put(chan); |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2300 | } |
| 2301 | |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 2302 | static inline int l2cap_ertm_init(struct l2cap_chan *chan) |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2303 | { |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 2304 | int err; |
| 2305 | |
Mat Martineau | 105bdf9 | 2012-04-27 16:50:48 -0700 | [diff] [blame] | 2306 | chan->next_tx_seq = 0; |
| 2307 | chan->expected_tx_seq = 0; |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 2308 | chan->expected_ack_seq = 0; |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 2309 | chan->unacked_frames = 0; |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 2310 | chan->buffer_seq = 0; |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 2311 | chan->num_acked = 0; |
| 2312 | chan->frames_sent = 0; |
Mat Martineau | 105bdf9 | 2012-04-27 16:50:48 -0700 | [diff] [blame] | 2313 | chan->last_acked_seq = 0; |
| 2314 | chan->sdu = NULL; |
| 2315 | chan->sdu_last_frag = NULL; |
| 2316 | chan->sdu_len = 0; |
| 2317 | |
| 2318 | if (chan->mode != L2CAP_MODE_ERTM) |
| 2319 | return 0; |
| 2320 | |
| 2321 | chan->rx_state = L2CAP_RX_STATE_RECV; |
| 2322 | chan->tx_state = L2CAP_TX_STATE_XMIT; |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2323 | |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 2324 | INIT_DELAYED_WORK(&chan->retrans_timer, l2cap_retrans_timeout); |
| 2325 | INIT_DELAYED_WORK(&chan->monitor_timer, l2cap_monitor_timeout); |
| 2326 | INIT_DELAYED_WORK(&chan->ack_timer, l2cap_ack_timeout); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2327 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 2328 | skb_queue_head_init(&chan->srej_q); |
Mat Martineau | 105bdf9 | 2012-04-27 16:50:48 -0700 | [diff] [blame] | 2329 | skb_queue_head_init(&chan->tx_q); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 2330 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 2331 | INIT_LIST_HEAD(&chan->srej_l); |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 2332 | err = l2cap_seq_list_init(&chan->srej_list, chan->tx_win); |
| 2333 | if (err < 0) |
| 2334 | return err; |
| 2335 | |
| 2336 | 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] | 2337 | } |
| 2338 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2339 | static inline __u8 l2cap_select_mode(__u8 mode, __u16 remote_feat_mask) |
| 2340 | { |
| 2341 | switch (mode) { |
| 2342 | case L2CAP_MODE_STREAMING: |
| 2343 | case L2CAP_MODE_ERTM: |
| 2344 | if (l2cap_mode_supported(mode, remote_feat_mask)) |
| 2345 | return mode; |
| 2346 | /* fall through */ |
| 2347 | default: |
| 2348 | return L2CAP_MODE_BASIC; |
| 2349 | } |
| 2350 | } |
| 2351 | |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2352 | static inline bool __l2cap_ews_supported(struct l2cap_chan *chan) |
| 2353 | { |
| 2354 | return enable_hs && chan->conn->feat_mask & L2CAP_FEAT_EXT_WINDOW; |
| 2355 | } |
| 2356 | |
Andrei Emeltchenko | f89cef0 | 2011-10-13 16:18:55 +0300 | [diff] [blame] | 2357 | static inline bool __l2cap_efs_supported(struct l2cap_chan *chan) |
| 2358 | { |
| 2359 | return enable_hs && chan->conn->feat_mask & L2CAP_FEAT_EXT_FLOW; |
| 2360 | } |
| 2361 | |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2362 | static inline void l2cap_txwin_setup(struct l2cap_chan *chan) |
| 2363 | { |
| 2364 | if (chan->tx_win > L2CAP_DEFAULT_TX_WINDOW && |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 2365 | __l2cap_ews_supported(chan)) { |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2366 | /* use extended control field */ |
| 2367 | set_bit(FLAG_EXT_CTRL, &chan->flags); |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 2368 | chan->tx_win_max = L2CAP_DEFAULT_EXT_WINDOW; |
| 2369 | } else { |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2370 | chan->tx_win = min_t(u16, chan->tx_win, |
| 2371 | L2CAP_DEFAULT_TX_WINDOW); |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 2372 | chan->tx_win_max = L2CAP_DEFAULT_TX_WINDOW; |
| 2373 | } |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2374 | } |
| 2375 | |
Gustavo F. Padovan | 710f9b0a | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2376 | static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2377 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2378 | struct l2cap_conf_req *req = data; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2379 | struct l2cap_conf_rfc rfc = { .mode = chan->mode }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2380 | void *ptr = req->data; |
Andrei Emeltchenko | c8f7916 | 2011-10-17 12:19:59 +0300 | [diff] [blame] | 2381 | u16 size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2382 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 2383 | BT_DBG("chan %p", chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2384 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2385 | if (chan->num_conf_req || chan->num_conf_rsp) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2386 | goto done; |
| 2387 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2388 | switch (chan->mode) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2389 | case L2CAP_MODE_STREAMING: |
| 2390 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2391 | if (test_bit(CONF_STATE2_DEVICE, &chan->conf_state)) |
Gustavo F. Padovan | 85eb53c | 2010-06-03 18:43:28 -0300 | [diff] [blame] | 2392 | break; |
Gustavo F. Padovan | 85eb53c | 2010-06-03 18:43:28 -0300 | [diff] [blame] | 2393 | |
Andrei Emeltchenko | f89cef0 | 2011-10-13 16:18:55 +0300 | [diff] [blame] | 2394 | if (__l2cap_efs_supported(chan)) |
| 2395 | set_bit(FLAG_EFS_ENABLE, &chan->flags); |
| 2396 | |
Gustavo F. Padovan | 2ba13ed | 2010-06-09 16:39:05 -0300 | [diff] [blame] | 2397 | /* fall through */ |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2398 | default: |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2399 | chan->mode = l2cap_select_mode(rfc.mode, chan->conn->feat_mask); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2400 | break; |
| 2401 | } |
| 2402 | |
| 2403 | done: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2404 | if (chan->imtu != L2CAP_DEFAULT_MTU) |
| 2405 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu); |
Gustavo F. Padovan | 7990681c | 2011-01-24 16:01:43 -0200 | [diff] [blame] | 2406 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2407 | switch (chan->mode) { |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 2408 | case L2CAP_MODE_BASIC: |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2409 | if (!(chan->conn->feat_mask & L2CAP_FEAT_ERTM) && |
| 2410 | !(chan->conn->feat_mask & L2CAP_FEAT_STREAMING)) |
Gustavo F. Padovan | 6340650 | 2010-08-03 23:49:29 -0300 | [diff] [blame] | 2411 | break; |
| 2412 | |
Gustavo F. Padovan | 6254775 | 2010-06-08 20:05:31 -0300 | [diff] [blame] | 2413 | rfc.mode = L2CAP_MODE_BASIC; |
| 2414 | rfc.txwin_size = 0; |
| 2415 | rfc.max_transmit = 0; |
| 2416 | rfc.retrans_timeout = 0; |
| 2417 | rfc.monitor_timeout = 0; |
| 2418 | rfc.max_pdu_size = 0; |
| 2419 | |
Gustavo F. Padovan | 6340650 | 2010-08-03 23:49:29 -0300 | [diff] [blame] | 2420 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
| 2421 | (unsigned long) &rfc); |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 2422 | break; |
| 2423 | |
| 2424 | case L2CAP_MODE_ERTM: |
| 2425 | rfc.mode = L2CAP_MODE_ERTM; |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2426 | rfc.max_transmit = chan->max_tx; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2427 | rfc.retrans_timeout = 0; |
| 2428 | rfc.monitor_timeout = 0; |
Andrei Emeltchenko | c8f7916 | 2011-10-17 12:19:59 +0300 | [diff] [blame] | 2429 | |
| 2430 | size = min_t(u16, L2CAP_DEFAULT_MAX_PDU_SIZE, chan->conn->mtu - |
| 2431 | L2CAP_EXT_HDR_SIZE - |
| 2432 | L2CAP_SDULEN_SIZE - |
| 2433 | L2CAP_FCS_SIZE); |
| 2434 | rfc.max_pdu_size = cpu_to_le16(size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2435 | |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2436 | l2cap_txwin_setup(chan); |
| 2437 | |
| 2438 | rfc.txwin_size = min_t(u16, chan->tx_win, |
| 2439 | L2CAP_DEFAULT_TX_WINDOW); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2440 | |
Gustavo F. Padovan | 6340650 | 2010-08-03 23:49:29 -0300 | [diff] [blame] | 2441 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
| 2442 | (unsigned long) &rfc); |
| 2443 | |
Andrei Emeltchenko | f89cef0 | 2011-10-13 16:18:55 +0300 | [diff] [blame] | 2444 | if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) |
| 2445 | l2cap_add_opt_efs(&ptr, chan); |
| 2446 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2447 | if (!(chan->conn->feat_mask & L2CAP_FEAT_FCS)) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2448 | break; |
| 2449 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2450 | if (chan->fcs == L2CAP_FCS_NONE || |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2451 | test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2452 | chan->fcs = L2CAP_FCS_NONE; |
| 2453 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, chan->fcs); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2454 | } |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2455 | |
| 2456 | if (test_bit(FLAG_EXT_CTRL, &chan->flags)) |
| 2457 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_EWS, 2, |
| 2458 | chan->tx_win); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2459 | break; |
| 2460 | |
| 2461 | case L2CAP_MODE_STREAMING: |
| 2462 | rfc.mode = L2CAP_MODE_STREAMING; |
| 2463 | rfc.txwin_size = 0; |
| 2464 | rfc.max_transmit = 0; |
| 2465 | rfc.retrans_timeout = 0; |
| 2466 | rfc.monitor_timeout = 0; |
Andrei Emeltchenko | c8f7916 | 2011-10-17 12:19:59 +0300 | [diff] [blame] | 2467 | |
| 2468 | size = min_t(u16, L2CAP_DEFAULT_MAX_PDU_SIZE, chan->conn->mtu - |
| 2469 | L2CAP_EXT_HDR_SIZE - |
| 2470 | L2CAP_SDULEN_SIZE - |
| 2471 | L2CAP_FCS_SIZE); |
| 2472 | rfc.max_pdu_size = cpu_to_le16(size); |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 2473 | |
Gustavo F. Padovan | 6340650 | 2010-08-03 23:49:29 -0300 | [diff] [blame] | 2474 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
| 2475 | (unsigned long) &rfc); |
| 2476 | |
Andrei Emeltchenko | f89cef0 | 2011-10-13 16:18:55 +0300 | [diff] [blame] | 2477 | if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) |
| 2478 | l2cap_add_opt_efs(&ptr, chan); |
| 2479 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2480 | if (!(chan->conn->feat_mask & L2CAP_FEAT_FCS)) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2481 | break; |
| 2482 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2483 | if (chan->fcs == L2CAP_FCS_NONE || |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2484 | test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2485 | chan->fcs = L2CAP_FCS_NONE; |
| 2486 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, chan->fcs); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2487 | } |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 2488 | break; |
| 2489 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2490 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2491 | req->dcid = cpu_to_le16(chan->dcid); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2492 | req->flags = cpu_to_le16(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2493 | |
| 2494 | return ptr - data; |
| 2495 | } |
| 2496 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2497 | static int l2cap_parse_conf_req(struct l2cap_chan *chan, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2498 | { |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2499 | struct l2cap_conf_rsp *rsp = data; |
| 2500 | void *ptr = rsp->data; |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2501 | void *req = chan->conf_req; |
| 2502 | int len = chan->conf_len; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2503 | int type, hint, olen; |
| 2504 | unsigned long val; |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2505 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 2506 | struct l2cap_conf_efs efs; |
| 2507 | u8 remote_efs = 0; |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 2508 | u16 mtu = L2CAP_DEFAULT_MTU; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2509 | u16 result = L2CAP_CONF_SUCCESS; |
Andrei Emeltchenko | c8f7916 | 2011-10-17 12:19:59 +0300 | [diff] [blame] | 2510 | u16 size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2511 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2512 | BT_DBG("chan %p", chan); |
Marcel Holtmann | 820ae1b | 2006-11-18 22:15:00 +0100 | [diff] [blame] | 2513 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2514 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 2515 | len -= l2cap_get_conf_opt(&req, &type, &olen, &val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2516 | |
Gustavo F. Padovan | 589d274 | 2009-04-20 01:31:07 -0300 | [diff] [blame] | 2517 | hint = type & L2CAP_CONF_HINT; |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 2518 | type &= L2CAP_CONF_MASK; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2519 | |
| 2520 | switch (type) { |
| 2521 | case L2CAP_CONF_MTU: |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 2522 | mtu = val; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2523 | break; |
| 2524 | |
| 2525 | case L2CAP_CONF_FLUSH_TO: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2526 | chan->flush_to = val; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2527 | break; |
| 2528 | |
| 2529 | case L2CAP_CONF_QOS: |
| 2530 | break; |
| 2531 | |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2532 | case L2CAP_CONF_RFC: |
| 2533 | if (olen == sizeof(rfc)) |
| 2534 | memcpy(&rfc, (void *) val, olen); |
| 2535 | break; |
| 2536 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2537 | case L2CAP_CONF_FCS: |
| 2538 | if (val == L2CAP_FCS_NONE) |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2539 | set_bit(CONF_NO_FCS_RECV, &chan->conf_state); |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 2540 | break; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2541 | |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 2542 | case L2CAP_CONF_EFS: |
| 2543 | remote_efs = 1; |
| 2544 | if (olen == sizeof(efs)) |
| 2545 | memcpy(&efs, (void *) val, olen); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2546 | break; |
| 2547 | |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2548 | case L2CAP_CONF_EWS: |
| 2549 | if (!enable_hs) |
| 2550 | return -ECONNREFUSED; |
| 2551 | |
| 2552 | set_bit(FLAG_EXT_CTRL, &chan->flags); |
| 2553 | set_bit(CONF_EWS_RECV, &chan->conf_state); |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 2554 | chan->tx_win_max = L2CAP_DEFAULT_EXT_WINDOW; |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2555 | chan->remote_tx_win = val; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2556 | break; |
| 2557 | |
| 2558 | default: |
| 2559 | if (hint) |
| 2560 | break; |
| 2561 | |
| 2562 | result = L2CAP_CONF_UNKNOWN; |
| 2563 | *((u8 *) ptr++) = type; |
| 2564 | break; |
| 2565 | } |
| 2566 | } |
| 2567 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2568 | if (chan->num_conf_rsp || chan->num_conf_req > 1) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2569 | goto done; |
| 2570 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2571 | switch (chan->mode) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2572 | case L2CAP_MODE_STREAMING: |
| 2573 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2574 | if (!test_bit(CONF_STATE2_DEVICE, &chan->conf_state)) { |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2575 | chan->mode = l2cap_select_mode(rfc.mode, |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2576 | chan->conn->feat_mask); |
Gustavo F. Padovan | 85eb53c | 2010-06-03 18:43:28 -0300 | [diff] [blame] | 2577 | break; |
| 2578 | } |
| 2579 | |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 2580 | if (remote_efs) { |
| 2581 | if (__l2cap_efs_supported(chan)) |
| 2582 | set_bit(FLAG_EFS_ENABLE, &chan->flags); |
| 2583 | else |
| 2584 | return -ECONNREFUSED; |
| 2585 | } |
| 2586 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2587 | if (chan->mode != rfc.mode) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2588 | return -ECONNREFUSED; |
Gustavo F. Padovan | 742e519 | 2010-06-08 19:09:48 -0300 | [diff] [blame] | 2589 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2590 | break; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2591 | } |
| 2592 | |
| 2593 | done: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2594 | if (chan->mode != rfc.mode) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2595 | result = L2CAP_CONF_UNACCEPT; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2596 | rfc.mode = chan->mode; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2597 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2598 | if (chan->num_conf_rsp == 1) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2599 | return -ECONNREFUSED; |
| 2600 | |
| 2601 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2602 | sizeof(rfc), (unsigned long) &rfc); |
| 2603 | } |
| 2604 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2605 | if (result == L2CAP_CONF_SUCCESS) { |
| 2606 | /* Configure output options and let the other side know |
| 2607 | * which ones we don't like. */ |
| 2608 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2609 | if (mtu < L2CAP_DEFAULT_MIN_MTU) |
| 2610 | result = L2CAP_CONF_UNACCEPT; |
| 2611 | else { |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2612 | chan->omtu = mtu; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2613 | set_bit(CONF_MTU_DONE, &chan->conf_state); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2614 | } |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2615 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->omtu); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2616 | |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 2617 | if (remote_efs) { |
| 2618 | if (chan->local_stype != L2CAP_SERV_NOTRAFIC && |
| 2619 | efs.stype != L2CAP_SERV_NOTRAFIC && |
| 2620 | efs.stype != chan->local_stype) { |
| 2621 | |
| 2622 | result = L2CAP_CONF_UNACCEPT; |
| 2623 | |
| 2624 | if (chan->num_conf_req >= 1) |
| 2625 | return -ECONNREFUSED; |
| 2626 | |
| 2627 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, |
Gustavo F. Padovan | 3e6b3b9 | 2011-11-01 14:06:23 -0200 | [diff] [blame] | 2628 | sizeof(efs), |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 2629 | (unsigned long) &efs); |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 2630 | } else { |
Gustavo F. Padovan | 3e6b3b9 | 2011-11-01 14:06:23 -0200 | [diff] [blame] | 2631 | /* Send PENDING Conf Rsp */ |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 2632 | result = L2CAP_CONF_PENDING; |
| 2633 | set_bit(CONF_LOC_CONF_PEND, &chan->conf_state); |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 2634 | } |
| 2635 | } |
| 2636 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2637 | switch (rfc.mode) { |
| 2638 | case L2CAP_MODE_BASIC: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2639 | chan->fcs = L2CAP_FCS_NONE; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2640 | set_bit(CONF_MODE_DONE, &chan->conf_state); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2641 | break; |
| 2642 | |
| 2643 | case L2CAP_MODE_ERTM: |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2644 | if (!test_bit(CONF_EWS_RECV, &chan->conf_state)) |
| 2645 | chan->remote_tx_win = rfc.txwin_size; |
| 2646 | else |
| 2647 | rfc.txwin_size = L2CAP_DEFAULT_TX_WINDOW; |
| 2648 | |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 2649 | chan->remote_max_tx = rfc.max_transmit; |
Mat Martineau | 86b1b26 | 2010-08-05 15:54:22 -0700 | [diff] [blame] | 2650 | |
Andrei Emeltchenko | c8f7916 | 2011-10-17 12:19:59 +0300 | [diff] [blame] | 2651 | size = min_t(u16, le16_to_cpu(rfc.max_pdu_size), |
| 2652 | chan->conn->mtu - |
| 2653 | L2CAP_EXT_HDR_SIZE - |
| 2654 | L2CAP_SDULEN_SIZE - |
| 2655 | L2CAP_FCS_SIZE); |
| 2656 | rfc.max_pdu_size = cpu_to_le16(size); |
| 2657 | chan->remote_mps = size; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2658 | |
Gustavo F. Padovan | 10467e9 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2659 | rfc.retrans_timeout = |
Andrei Emeltchenko | 4fd21a8 | 2012-03-12 12:13:10 +0200 | [diff] [blame] | 2660 | __constant_cpu_to_le16(L2CAP_DEFAULT_RETRANS_TO); |
Gustavo F. Padovan | 10467e9 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2661 | rfc.monitor_timeout = |
Andrei Emeltchenko | 4fd21a8 | 2012-03-12 12:13:10 +0200 | [diff] [blame] | 2662 | __constant_cpu_to_le16(L2CAP_DEFAULT_MONITOR_TO); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2663 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2664 | set_bit(CONF_MODE_DONE, &chan->conf_state); |
Gustavo F. Padovan | 68ae663 | 2009-10-17 21:41:01 -0300 | [diff] [blame] | 2665 | |
| 2666 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2667 | sizeof(rfc), (unsigned long) &rfc); |
| 2668 | |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 2669 | if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) { |
| 2670 | chan->remote_id = efs.id; |
| 2671 | chan->remote_stype = efs.stype; |
| 2672 | chan->remote_msdu = le16_to_cpu(efs.msdu); |
| 2673 | chan->remote_flush_to = |
| 2674 | le32_to_cpu(efs.flush_to); |
| 2675 | chan->remote_acc_lat = |
| 2676 | le32_to_cpu(efs.acc_lat); |
| 2677 | chan->remote_sdu_itime = |
| 2678 | le32_to_cpu(efs.sdu_itime); |
| 2679 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, |
| 2680 | sizeof(efs), (unsigned long) &efs); |
| 2681 | } |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2682 | break; |
| 2683 | |
| 2684 | case L2CAP_MODE_STREAMING: |
Andrei Emeltchenko | c8f7916 | 2011-10-17 12:19:59 +0300 | [diff] [blame] | 2685 | size = min_t(u16, le16_to_cpu(rfc.max_pdu_size), |
| 2686 | chan->conn->mtu - |
| 2687 | L2CAP_EXT_HDR_SIZE - |
| 2688 | L2CAP_SDULEN_SIZE - |
| 2689 | L2CAP_FCS_SIZE); |
| 2690 | rfc.max_pdu_size = cpu_to_le16(size); |
| 2691 | chan->remote_mps = size; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2692 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2693 | set_bit(CONF_MODE_DONE, &chan->conf_state); |
Gustavo F. Padovan | 68ae663 | 2009-10-17 21:41:01 -0300 | [diff] [blame] | 2694 | |
| 2695 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2696 | sizeof(rfc), (unsigned long) &rfc); |
| 2697 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2698 | break; |
| 2699 | |
| 2700 | default: |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2701 | result = L2CAP_CONF_UNACCEPT; |
| 2702 | |
| 2703 | memset(&rfc, 0, sizeof(rfc)); |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2704 | rfc.mode = chan->mode; |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2705 | } |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2706 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2707 | if (result == L2CAP_CONF_SUCCESS) |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2708 | set_bit(CONF_OUTPUT_DONE, &chan->conf_state); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2709 | } |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2710 | rsp->scid = cpu_to_le16(chan->dcid); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2711 | rsp->result = cpu_to_le16(result); |
| 2712 | rsp->flags = cpu_to_le16(0x0000); |
| 2713 | |
| 2714 | return ptr - data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2715 | } |
| 2716 | |
Gustavo F. Padovan | b445003 | 2011-04-12 18:15:09 -0300 | [diff] [blame] | 2717 | 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] | 2718 | { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2719 | struct l2cap_conf_req *req = data; |
| 2720 | void *ptr = req->data; |
| 2721 | int type, olen; |
| 2722 | unsigned long val; |
Mat Martineau | 36e999a | 2011-12-08 17:23:21 -0800 | [diff] [blame] | 2723 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
Andrei Emeltchenko | 66af7aa | 2011-11-07 14:20:33 +0200 | [diff] [blame] | 2724 | struct l2cap_conf_efs efs; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2725 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2726 | 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] | 2727 | |
| 2728 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 2729 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); |
| 2730 | |
| 2731 | switch (type) { |
| 2732 | case L2CAP_CONF_MTU: |
| 2733 | if (val < L2CAP_DEFAULT_MIN_MTU) { |
| 2734 | *result = L2CAP_CONF_UNACCEPT; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2735 | chan->imtu = L2CAP_DEFAULT_MIN_MTU; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2736 | } else |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2737 | chan->imtu = val; |
| 2738 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2739 | break; |
| 2740 | |
| 2741 | case L2CAP_CONF_FLUSH_TO: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2742 | chan->flush_to = val; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2743 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2744 | 2, chan->flush_to); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2745 | break; |
| 2746 | |
| 2747 | case L2CAP_CONF_RFC: |
| 2748 | if (olen == sizeof(rfc)) |
| 2749 | memcpy(&rfc, (void *)val, olen); |
| 2750 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2751 | if (test_bit(CONF_STATE2_DEVICE, &chan->conf_state) && |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2752 | rfc.mode != chan->mode) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2753 | return -ECONNREFUSED; |
| 2754 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2755 | chan->fcs = 0; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2756 | |
| 2757 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2758 | sizeof(rfc), (unsigned long) &rfc); |
| 2759 | break; |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2760 | |
| 2761 | case L2CAP_CONF_EWS: |
| 2762 | chan->tx_win = min_t(u16, val, |
| 2763 | L2CAP_DEFAULT_EXT_WINDOW); |
Gustavo F. Padovan | 3e6b3b9 | 2011-11-01 14:06:23 -0200 | [diff] [blame] | 2764 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_EWS, 2, |
| 2765 | chan->tx_win); |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2766 | break; |
Andrei Emeltchenko | 66af7aa | 2011-11-07 14:20:33 +0200 | [diff] [blame] | 2767 | |
| 2768 | case L2CAP_CONF_EFS: |
| 2769 | if (olen == sizeof(efs)) |
| 2770 | memcpy(&efs, (void *)val, olen); |
| 2771 | |
| 2772 | if (chan->local_stype != L2CAP_SERV_NOTRAFIC && |
| 2773 | efs.stype != L2CAP_SERV_NOTRAFIC && |
| 2774 | efs.stype != chan->local_stype) |
| 2775 | return -ECONNREFUSED; |
| 2776 | |
| 2777 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, |
| 2778 | sizeof(efs), (unsigned long) &efs); |
| 2779 | break; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2780 | } |
| 2781 | } |
| 2782 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2783 | if (chan->mode == L2CAP_MODE_BASIC && chan->mode != rfc.mode) |
Gustavo F. Padovan | 6c2ea7a | 2010-06-08 20:08:49 -0300 | [diff] [blame] | 2784 | return -ECONNREFUSED; |
| 2785 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2786 | chan->mode = rfc.mode; |
Gustavo F. Padovan | 6c2ea7a | 2010-06-08 20:08:49 -0300 | [diff] [blame] | 2787 | |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 2788 | if (*result == L2CAP_CONF_SUCCESS || *result == L2CAP_CONF_PENDING) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2789 | switch (rfc.mode) { |
| 2790 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2791 | chan->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); |
| 2792 | chan->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); |
| 2793 | chan->mps = le16_to_cpu(rfc.max_pdu_size); |
Andrei Emeltchenko | 66af7aa | 2011-11-07 14:20:33 +0200 | [diff] [blame] | 2794 | |
| 2795 | if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) { |
| 2796 | chan->local_msdu = le16_to_cpu(efs.msdu); |
| 2797 | chan->local_sdu_itime = |
| 2798 | le32_to_cpu(efs.sdu_itime); |
| 2799 | chan->local_acc_lat = le32_to_cpu(efs.acc_lat); |
| 2800 | chan->local_flush_to = |
| 2801 | le32_to_cpu(efs.flush_to); |
| 2802 | } |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2803 | break; |
Andrei Emeltchenko | 66af7aa | 2011-11-07 14:20:33 +0200 | [diff] [blame] | 2804 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2805 | case L2CAP_MODE_STREAMING: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2806 | chan->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2807 | } |
| 2808 | } |
| 2809 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2810 | req->dcid = cpu_to_le16(chan->dcid); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2811 | req->flags = cpu_to_le16(0x0000); |
| 2812 | |
| 2813 | return ptr - data; |
| 2814 | } |
| 2815 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2816 | 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] | 2817 | { |
| 2818 | struct l2cap_conf_rsp *rsp = data; |
| 2819 | void *ptr = rsp->data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2820 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2821 | BT_DBG("chan %p", chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2822 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2823 | rsp->scid = cpu_to_le16(chan->dcid); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2824 | rsp->result = cpu_to_le16(result); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2825 | rsp->flags = cpu_to_le16(flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2826 | |
| 2827 | return ptr - data; |
| 2828 | } |
| 2829 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2830 | void __l2cap_connect_rsp_defer(struct l2cap_chan *chan) |
Gustavo F. Padovan | 710f9b0a | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2831 | { |
| 2832 | struct l2cap_conn_rsp rsp; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2833 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 710f9b0a | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2834 | u8 buf[128]; |
| 2835 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2836 | rsp.scid = cpu_to_le16(chan->dcid); |
| 2837 | rsp.dcid = cpu_to_le16(chan->scid); |
Gustavo F. Padovan | 710f9b0a | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2838 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); |
| 2839 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 2840 | l2cap_send_cmd(conn, chan->ident, |
| 2841 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
| 2842 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2843 | if (test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) |
Gustavo F. Padovan | 710f9b0a | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2844 | return; |
| 2845 | |
Gustavo F. Padovan | 710f9b0a | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2846 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
| 2847 | l2cap_build_conf_req(chan, buf), buf); |
| 2848 | chan->num_conf_req++; |
| 2849 | } |
| 2850 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2851 | 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] | 2852 | { |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2853 | int type, olen; |
| 2854 | unsigned long val; |
| 2855 | struct l2cap_conf_rfc rfc; |
| 2856 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2857 | BT_DBG("chan %p, rsp %p, len %d", chan, rsp, len); |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2858 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2859 | if ((chan->mode != L2CAP_MODE_ERTM) && (chan->mode != L2CAP_MODE_STREAMING)) |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2860 | return; |
| 2861 | |
| 2862 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 2863 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); |
| 2864 | |
| 2865 | switch (type) { |
| 2866 | case L2CAP_CONF_RFC: |
| 2867 | if (olen == sizeof(rfc)) |
| 2868 | memcpy(&rfc, (void *)val, olen); |
| 2869 | goto done; |
| 2870 | } |
| 2871 | } |
| 2872 | |
Mat Martineau | 36e999a | 2011-12-08 17:23:21 -0800 | [diff] [blame] | 2873 | /* Use sane default values in case a misbehaving remote device |
| 2874 | * did not send an RFC option. |
| 2875 | */ |
| 2876 | rfc.mode = chan->mode; |
| 2877 | rfc.retrans_timeout = cpu_to_le16(L2CAP_DEFAULT_RETRANS_TO); |
| 2878 | rfc.monitor_timeout = cpu_to_le16(L2CAP_DEFAULT_MONITOR_TO); |
| 2879 | rfc.max_pdu_size = cpu_to_le16(chan->imtu); |
| 2880 | |
| 2881 | BT_ERR("Expected RFC option was not found, using defaults"); |
| 2882 | |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2883 | done: |
| 2884 | switch (rfc.mode) { |
| 2885 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2886 | chan->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); |
| 2887 | chan->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); |
| 2888 | chan->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2889 | break; |
| 2890 | case L2CAP_MODE_STREAMING: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2891 | chan->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2892 | } |
| 2893 | } |
| 2894 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2895 | static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2896 | { |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 2897 | struct l2cap_cmd_rej_unk *rej = (struct l2cap_cmd_rej_unk *) data; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2898 | |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 2899 | if (rej->reason != L2CAP_REJ_NOT_UNDERSTOOD) |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2900 | return 0; |
| 2901 | |
| 2902 | if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) && |
| 2903 | cmd->ident == conn->info_ident) { |
Ulisses Furquim | 17cd3f3 | 2012-01-30 18:26:28 -0200 | [diff] [blame] | 2904 | cancel_delayed_work(&conn->info_timer); |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2905 | |
| 2906 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 2907 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2908 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2909 | l2cap_conn_start(conn); |
| 2910 | } |
| 2911 | |
| 2912 | return 0; |
| 2913 | } |
| 2914 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2915 | static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2916 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2917 | struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; |
| 2918 | struct l2cap_conn_rsp rsp; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 2919 | struct l2cap_chan *chan = NULL, *pchan; |
Nathan Holstein | d793fe8 | 2010-10-15 11:54:02 -0400 | [diff] [blame] | 2920 | struct sock *parent, *sk = NULL; |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2921 | int result, status = L2CAP_CS_NO_INFO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2922 | |
| 2923 | u16 dcid = 0, scid = __le16_to_cpu(req->scid); |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2924 | __le16 psm = req->psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2925 | |
Andrei Emeltchenko | 097db76 | 2012-03-09 14:16:17 +0200 | [diff] [blame] | 2926 | 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] | 2927 | |
| 2928 | /* Check if we have socket listening on psm */ |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 2929 | 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] | 2930 | if (!pchan) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2931 | result = L2CAP_CR_BAD_PSM; |
| 2932 | goto sendresp; |
| 2933 | } |
| 2934 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 2935 | parent = pchan->sk; |
| 2936 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 2937 | mutex_lock(&conn->chan_lock); |
Gustavo F. Padovan | aa2ac88 | 2011-06-24 01:53:01 -0300 | [diff] [blame] | 2938 | lock_sock(parent); |
Gustavo F. Padovan | e0f0cb5 | 2010-11-01 18:43:53 +0000 | [diff] [blame] | 2939 | |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2940 | /* Check if the ACL is secure enough (if not SDP) */ |
| 2941 | if (psm != cpu_to_le16(0x0001) && |
| 2942 | !hci_conn_check_link_mode(conn->hcon)) { |
Andrei Emeltchenko | 9f5a0d7 | 2011-11-07 14:20:25 +0200 | [diff] [blame] | 2943 | conn->disc_reason = HCI_ERROR_AUTH_FAILURE; |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2944 | result = L2CAP_CR_SEC_BLOCK; |
| 2945 | goto response; |
| 2946 | } |
| 2947 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2948 | result = L2CAP_CR_NO_MEM; |
| 2949 | |
| 2950 | /* Check for backlog size */ |
| 2951 | if (sk_acceptq_is_full(parent)) { |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 2952 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2953 | goto response; |
| 2954 | } |
| 2955 | |
Gustavo F. Padovan | 80808e4 | 2011-05-16 17:24:37 -0300 | [diff] [blame] | 2956 | chan = pchan->ops->new_connection(pchan->data); |
| 2957 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2958 | goto response; |
| 2959 | |
Gustavo F. Padovan | 80808e4 | 2011-05-16 17:24:37 -0300 | [diff] [blame] | 2960 | sk = chan->sk; |
| 2961 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2962 | /* Check if we already have channel with that dcid */ |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2963 | if (__l2cap_get_chan_by_dcid(conn, scid)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2964 | sock_set_flag(sk, SOCK_ZAPPED); |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 2965 | chan->ops->close(chan->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2966 | goto response; |
| 2967 | } |
| 2968 | |
| 2969 | hci_conn_hold(conn->hcon); |
| 2970 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2971 | bacpy(&bt_sk(sk)->src, conn->src); |
| 2972 | bacpy(&bt_sk(sk)->dst, conn->dst); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2973 | chan->psm = psm; |
| 2974 | chan->dcid = scid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2975 | |
Gustavo F. Padovan | d101024 | 2011-03-25 00:39:48 -0300 | [diff] [blame] | 2976 | bt_accept_enqueue(parent, sk); |
| 2977 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 2978 | __l2cap_chan_add(conn, chan); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2979 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2980 | dcid = chan->scid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2981 | |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 2982 | __set_chan_timer(chan, sk->sk_sndtimeo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2983 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 2984 | chan->ident = cmd->ident; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2985 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2986 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) { |
Gustavo F. Padovan | d45fc42 | 2011-11-05 19:54:24 -0200 | [diff] [blame] | 2987 | if (l2cap_chan_check_security(chan)) { |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 2988 | if (bt_sk(sk)->defer_setup) { |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 2989 | __l2cap_state_change(chan, BT_CONNECT2); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 2990 | result = L2CAP_CR_PEND; |
| 2991 | status = L2CAP_CS_AUTHOR_PEND; |
| 2992 | parent->sk_data_ready(parent, 0); |
| 2993 | } else { |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 2994 | __l2cap_state_change(chan, BT_CONFIG); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 2995 | result = L2CAP_CR_SUCCESS; |
| 2996 | status = L2CAP_CS_NO_INFO; |
| 2997 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2998 | } else { |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 2999 | __l2cap_state_change(chan, BT_CONNECT2); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 3000 | result = L2CAP_CR_PEND; |
| 3001 | status = L2CAP_CS_AUTHEN_PEND; |
| 3002 | } |
| 3003 | } else { |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 3004 | __l2cap_state_change(chan, BT_CONNECT2); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 3005 | result = L2CAP_CR_PEND; |
| 3006 | status = L2CAP_CS_NO_INFO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3007 | } |
| 3008 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3009 | response: |
Gustavo F. Padovan | aa2ac88 | 2011-06-24 01:53:01 -0300 | [diff] [blame] | 3010 | release_sock(parent); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3011 | mutex_unlock(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3012 | |
| 3013 | sendresp: |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 3014 | rsp.scid = cpu_to_le16(scid); |
| 3015 | rsp.dcid = cpu_to_le16(dcid); |
| 3016 | rsp.result = cpu_to_le16(result); |
| 3017 | rsp.status = cpu_to_le16(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3018 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 3019 | |
| 3020 | if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) { |
| 3021 | struct l2cap_info_req info; |
| 3022 | info.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 3023 | |
| 3024 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; |
| 3025 | conn->info_ident = l2cap_get_ident(conn); |
| 3026 | |
Marcel Holtmann | ba13ccd | 2012-03-01 14:25:33 -0800 | [diff] [blame] | 3027 | schedule_delayed_work(&conn->info_timer, L2CAP_INFO_TIMEOUT); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 3028 | |
| 3029 | l2cap_send_cmd(conn, conn->info_ident, |
| 3030 | L2CAP_INFO_REQ, sizeof(info), &info); |
| 3031 | } |
| 3032 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3033 | if (chan && !test_bit(CONF_REQ_SENT, &chan->conf_state) && |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 3034 | result == L2CAP_CR_SUCCESS) { |
| 3035 | u8 buf[128]; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3036 | set_bit(CONF_REQ_SENT, &chan->conf_state); |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 3037 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 3038 | l2cap_build_conf_req(chan, buf), buf); |
| 3039 | chan->num_conf_req++; |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 3040 | } |
| 3041 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3042 | return 0; |
| 3043 | } |
| 3044 | |
| 3045 | static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3046 | { |
| 3047 | struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; |
| 3048 | u16 scid, dcid, result, status; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3049 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3050 | u8 req[128]; |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3051 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3052 | |
| 3053 | scid = __le16_to_cpu(rsp->scid); |
| 3054 | dcid = __le16_to_cpu(rsp->dcid); |
| 3055 | result = __le16_to_cpu(rsp->result); |
| 3056 | status = __le16_to_cpu(rsp->status); |
| 3057 | |
Andrei Emeltchenko | 1b009c9 | 2012-02-21 12:54:54 +0200 | [diff] [blame] | 3058 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", |
| 3059 | dcid, scid, result, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3060 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3061 | mutex_lock(&conn->chan_lock); |
| 3062 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3063 | if (scid) { |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3064 | chan = __l2cap_get_chan_by_scid(conn, scid); |
| 3065 | if (!chan) { |
| 3066 | err = -EFAULT; |
| 3067 | goto unlock; |
| 3068 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3069 | } else { |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3070 | chan = __l2cap_get_chan_by_ident(conn, cmd->ident); |
| 3071 | if (!chan) { |
| 3072 | err = -EFAULT; |
| 3073 | goto unlock; |
| 3074 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3075 | } |
| 3076 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3077 | err = 0; |
| 3078 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3079 | l2cap_chan_lock(chan); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3080 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3081 | switch (result) { |
| 3082 | case L2CAP_CR_SUCCESS: |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 3083 | l2cap_state_change(chan, BT_CONFIG); |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 3084 | chan->ident = 0; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 3085 | chan->dcid = dcid; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3086 | clear_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Marcel Holtmann | 6a8d301 | 2009-02-06 23:56:36 +0100 | [diff] [blame] | 3087 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3088 | if (test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 3089 | break; |
| 3090 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3091 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 3092 | l2cap_build_conf_req(chan, req), req); |
| 3093 | chan->num_conf_req++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3094 | break; |
| 3095 | |
| 3096 | case L2CAP_CR_PEND: |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3097 | set_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3098 | break; |
| 3099 | |
| 3100 | default: |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3101 | l2cap_chan_del(chan, ECONNREFUSED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3102 | break; |
| 3103 | } |
| 3104 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3105 | l2cap_chan_unlock(chan); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3106 | |
| 3107 | unlock: |
| 3108 | mutex_unlock(&conn->chan_lock); |
| 3109 | |
| 3110 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3111 | } |
| 3112 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3113 | static inline void set_default_fcs(struct l2cap_chan *chan) |
Mat Martineau | 8c462b6 | 2010-08-24 15:35:42 -0700 | [diff] [blame] | 3114 | { |
| 3115 | /* FCS is enabled only in ERTM or streaming mode, if one or both |
| 3116 | * sides request it. |
| 3117 | */ |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3118 | if (chan->mode != L2CAP_MODE_ERTM && chan->mode != L2CAP_MODE_STREAMING) |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3119 | chan->fcs = L2CAP_FCS_NONE; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3120 | else if (!test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3121 | chan->fcs = L2CAP_FCS_CRC16; |
Mat Martineau | 8c462b6 | 2010-08-24 15:35:42 -0700 | [diff] [blame] | 3122 | } |
| 3123 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3124 | 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] | 3125 | { |
| 3126 | struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; |
| 3127 | u16 dcid, flags; |
| 3128 | u8 rsp[64]; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3129 | struct l2cap_chan *chan; |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 3130 | int len, err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3131 | |
| 3132 | dcid = __le16_to_cpu(req->dcid); |
| 3133 | flags = __le16_to_cpu(req->flags); |
| 3134 | |
| 3135 | BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); |
| 3136 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 3137 | chan = l2cap_get_chan_by_scid(conn, dcid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3138 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3139 | return -ENOENT; |
| 3140 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3141 | l2cap_chan_lock(chan); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3142 | |
David S. Miller | 033b114 | 2011-07-21 13:38:42 -0700 | [diff] [blame] | 3143 | if (chan->state != BT_CONFIG && chan->state != BT_CONNECT2) { |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 3144 | struct l2cap_cmd_rej_cid rej; |
Gustavo F. Padovan | df6bd74 | 2010-06-14 02:26:15 -0300 | [diff] [blame] | 3145 | |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 3146 | rej.reason = cpu_to_le16(L2CAP_REJ_INVALID_CID); |
| 3147 | rej.scid = cpu_to_le16(chan->scid); |
| 3148 | rej.dcid = cpu_to_le16(chan->dcid); |
| 3149 | |
Gustavo F. Padovan | df6bd74 | 2010-06-14 02:26:15 -0300 | [diff] [blame] | 3150 | l2cap_send_cmd(conn, cmd->ident, L2CAP_COMMAND_REJ, |
| 3151 | sizeof(rej), &rej); |
Marcel Holtmann | 354f60a | 2006-11-18 22:15:20 +0100 | [diff] [blame] | 3152 | goto unlock; |
Gustavo F. Padovan | df6bd74 | 2010-06-14 02:26:15 -0300 | [diff] [blame] | 3153 | } |
Marcel Holtmann | 354f60a | 2006-11-18 22:15:20 +0100 | [diff] [blame] | 3154 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3155 | /* Reject if config buffer is too small. */ |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3156 | len = cmd_len - sizeof(*req); |
Dan Rosenberg | 7ac2881 | 2011-06-24 08:38:05 -0400 | [diff] [blame] | 3157 | if (len < 0 || chan->conf_len + len > sizeof(chan->conf_req)) { |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3158 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 3159 | l2cap_build_conf_rsp(chan, rsp, |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3160 | L2CAP_CONF_REJECT, flags), rsp); |
| 3161 | goto unlock; |
| 3162 | } |
| 3163 | |
| 3164 | /* Store config. */ |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 3165 | memcpy(chan->conf_req + chan->conf_len, req->data, len); |
| 3166 | chan->conf_len += len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3167 | |
| 3168 | if (flags & 0x0001) { |
| 3169 | /* Incomplete config. Send empty response. */ |
| 3170 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 3171 | l2cap_build_conf_rsp(chan, rsp, |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3172 | L2CAP_CONF_SUCCESS, 0x0001), rsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3173 | goto unlock; |
| 3174 | } |
| 3175 | |
| 3176 | /* Complete config. */ |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 3177 | len = l2cap_parse_conf_req(chan, rsp); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3178 | if (len < 0) { |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 3179 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3180 | goto unlock; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3181 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3182 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3183 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 3184 | chan->num_conf_rsp++; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3185 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3186 | /* Reset config buffer. */ |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 3187 | chan->conf_len = 0; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3188 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3189 | if (!test_bit(CONF_OUTPUT_DONE, &chan->conf_state)) |
Marcel Holtmann | 876d948 | 2007-10-20 13:35:42 +0200 | [diff] [blame] | 3190 | goto unlock; |
| 3191 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3192 | if (test_bit(CONF_INPUT_DONE, &chan->conf_state)) { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3193 | set_default_fcs(chan); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3194 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 3195 | l2cap_state_change(chan, BT_CONNECTED); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 3196 | |
Mat Martineau | 105bdf9 | 2012-04-27 16:50:48 -0700 | [diff] [blame] | 3197 | if (chan->mode == L2CAP_MODE_ERTM || |
| 3198 | chan->mode == L2CAP_MODE_STREAMING) |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 3199 | err = l2cap_ertm_init(chan); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 3200 | |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 3201 | if (err < 0) |
| 3202 | l2cap_send_disconn_req(chan->conn, chan, -err); |
| 3203 | else |
| 3204 | l2cap_chan_ready(chan); |
| 3205 | |
Marcel Holtmann | 876d948 | 2007-10-20 13:35:42 +0200 | [diff] [blame] | 3206 | goto unlock; |
| 3207 | } |
| 3208 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3209 | if (!test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 3210 | u8 buf[64]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3211 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 3212 | l2cap_build_conf_req(chan, buf), buf); |
| 3213 | chan->num_conf_req++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3214 | } |
| 3215 | |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 3216 | /* Got Conf Rsp PENDING from remote side and asume we sent |
| 3217 | Conf Rsp PENDING in the code above */ |
| 3218 | if (test_bit(CONF_REM_CONF_PEND, &chan->conf_state) && |
| 3219 | test_bit(CONF_LOC_CONF_PEND, &chan->conf_state)) { |
| 3220 | |
| 3221 | /* check compatibility */ |
| 3222 | |
| 3223 | clear_bit(CONF_LOC_CONF_PEND, &chan->conf_state); |
| 3224 | set_bit(CONF_OUTPUT_DONE, &chan->conf_state); |
| 3225 | |
| 3226 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
Gustavo F. Padovan | 3e6b3b9 | 2011-11-01 14:06:23 -0200 | [diff] [blame] | 3227 | l2cap_build_conf_rsp(chan, rsp, |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 3228 | L2CAP_CONF_SUCCESS, 0x0000), rsp); |
| 3229 | } |
| 3230 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3231 | unlock: |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3232 | l2cap_chan_unlock(chan); |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 3233 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3234 | } |
| 3235 | |
| 3236 | static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3237 | { |
| 3238 | struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; |
| 3239 | u16 scid, flags, result; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3240 | struct l2cap_chan *chan; |
Andrei Emeltchenko | 61386cb | 2012-03-12 12:13:07 +0200 | [diff] [blame] | 3241 | int len = le16_to_cpu(cmd->len) - sizeof(*rsp); |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 3242 | int err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3243 | |
| 3244 | scid = __le16_to_cpu(rsp->scid); |
| 3245 | flags = __le16_to_cpu(rsp->flags); |
| 3246 | result = __le16_to_cpu(rsp->result); |
| 3247 | |
Andrei Emeltchenko | 61386cb | 2012-03-12 12:13:07 +0200 | [diff] [blame] | 3248 | BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x len %d", scid, flags, |
| 3249 | result, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3250 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 3251 | chan = l2cap_get_chan_by_scid(conn, scid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3252 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3253 | return 0; |
| 3254 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3255 | l2cap_chan_lock(chan); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3256 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3257 | switch (result) { |
| 3258 | case L2CAP_CONF_SUCCESS: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3259 | l2cap_conf_rfc_get(chan, rsp->data, len); |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 3260 | clear_bit(CONF_REM_CONF_PEND, &chan->conf_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3261 | break; |
| 3262 | |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 3263 | case L2CAP_CONF_PENDING: |
| 3264 | set_bit(CONF_REM_CONF_PEND, &chan->conf_state); |
| 3265 | |
| 3266 | if (test_bit(CONF_LOC_CONF_PEND, &chan->conf_state)) { |
| 3267 | char buf[64]; |
| 3268 | |
| 3269 | len = l2cap_parse_conf_rsp(chan, rsp->data, len, |
| 3270 | buf, &result); |
| 3271 | if (len < 0) { |
| 3272 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
| 3273 | goto done; |
| 3274 | } |
| 3275 | |
| 3276 | /* check compatibility */ |
| 3277 | |
| 3278 | clear_bit(CONF_LOC_CONF_PEND, &chan->conf_state); |
| 3279 | set_bit(CONF_OUTPUT_DONE, &chan->conf_state); |
| 3280 | |
| 3281 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
Gustavo F. Padovan | 3e6b3b9 | 2011-11-01 14:06:23 -0200 | [diff] [blame] | 3282 | l2cap_build_conf_rsp(chan, buf, |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 3283 | L2CAP_CONF_SUCCESS, 0x0000), buf); |
| 3284 | } |
| 3285 | goto done; |
| 3286 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3287 | case L2CAP_CONF_UNACCEPT: |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 3288 | if (chan->num_conf_rsp <= L2CAP_CONF_MAX_CONF_RSP) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3289 | char req[64]; |
| 3290 | |
Andrei Emeltchenko | c2c77ec | 2010-03-19 10:26:28 +0200 | [diff] [blame] | 3291 | if (len > sizeof(req) - sizeof(struct l2cap_conf_req)) { |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 3292 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
Andrei Emeltchenko | c2c77ec | 2010-03-19 10:26:28 +0200 | [diff] [blame] | 3293 | goto done; |
| 3294 | } |
| 3295 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3296 | /* throw out any old stored conf requests */ |
| 3297 | result = L2CAP_CONF_SUCCESS; |
Gustavo F. Padovan | b445003 | 2011-04-12 18:15:09 -0300 | [diff] [blame] | 3298 | len = l2cap_parse_conf_rsp(chan, rsp->data, len, |
| 3299 | req, &result); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3300 | if (len < 0) { |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 3301 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3302 | goto done; |
| 3303 | } |
| 3304 | |
| 3305 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
| 3306 | L2CAP_CONF_REQ, len, req); |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 3307 | chan->num_conf_req++; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3308 | if (result != L2CAP_CONF_SUCCESS) |
| 3309 | goto done; |
| 3310 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3311 | } |
| 3312 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 3313 | default: |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3314 | l2cap_chan_set_err(chan, ECONNRESET); |
Andrei Emeltchenko | 2e0052e | 2012-02-21 12:54:58 +0200 | [diff] [blame] | 3315 | |
Marcel Holtmann | ba13ccd | 2012-03-01 14:25:33 -0800 | [diff] [blame] | 3316 | __set_chan_timer(chan, L2CAP_DISC_REJ_TIMEOUT); |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 3317 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3318 | goto done; |
| 3319 | } |
| 3320 | |
| 3321 | if (flags & 0x01) |
| 3322 | goto done; |
| 3323 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3324 | set_bit(CONF_INPUT_DONE, &chan->conf_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3325 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3326 | if (test_bit(CONF_OUTPUT_DONE, &chan->conf_state)) { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3327 | set_default_fcs(chan); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3328 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 3329 | l2cap_state_change(chan, BT_CONNECTED); |
Mat Martineau | 105bdf9 | 2012-04-27 16:50:48 -0700 | [diff] [blame] | 3330 | if (chan->mode == L2CAP_MODE_ERTM || |
| 3331 | chan->mode == L2CAP_MODE_STREAMING) |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 3332 | err = l2cap_ertm_init(chan); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 3333 | |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 3334 | if (err < 0) |
| 3335 | l2cap_send_disconn_req(chan->conn, chan, -err); |
| 3336 | else |
| 3337 | l2cap_chan_ready(chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3338 | } |
| 3339 | |
| 3340 | done: |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3341 | l2cap_chan_unlock(chan); |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 3342 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3343 | } |
| 3344 | |
| 3345 | static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3346 | { |
| 3347 | struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; |
| 3348 | struct l2cap_disconn_rsp rsp; |
| 3349 | u16 dcid, scid; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3350 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3351 | struct sock *sk; |
| 3352 | |
| 3353 | scid = __le16_to_cpu(req->scid); |
| 3354 | dcid = __le16_to_cpu(req->dcid); |
| 3355 | |
| 3356 | BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); |
| 3357 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3358 | mutex_lock(&conn->chan_lock); |
| 3359 | |
| 3360 | chan = __l2cap_get_chan_by_scid(conn, dcid); |
| 3361 | if (!chan) { |
| 3362 | mutex_unlock(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3363 | return 0; |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3364 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3365 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3366 | l2cap_chan_lock(chan); |
| 3367 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3368 | sk = chan->sk; |
| 3369 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 3370 | rsp.dcid = cpu_to_le16(chan->scid); |
| 3371 | rsp.scid = cpu_to_le16(chan->dcid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3372 | l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); |
| 3373 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3374 | lock_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3375 | sk->sk_shutdown = SHUTDOWN_MASK; |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3376 | release_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3377 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3378 | l2cap_chan_del(chan, ECONNRESET); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3379 | |
| 3380 | l2cap_chan_unlock(chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3381 | |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 3382 | chan->ops->close(chan->data); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3383 | |
| 3384 | mutex_unlock(&conn->chan_lock); |
| 3385 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3386 | return 0; |
| 3387 | } |
| 3388 | |
| 3389 | static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3390 | { |
| 3391 | struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; |
| 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 | |
| 3395 | scid = __le16_to_cpu(rsp->scid); |
| 3396 | dcid = __le16_to_cpu(rsp->dcid); |
| 3397 | |
| 3398 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); |
| 3399 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3400 | mutex_lock(&conn->chan_lock); |
| 3401 | |
| 3402 | chan = __l2cap_get_chan_by_scid(conn, scid); |
| 3403 | if (!chan) { |
| 3404 | mutex_unlock(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3405 | return 0; |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3406 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3407 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3408 | l2cap_chan_lock(chan); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3409 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3410 | l2cap_chan_del(chan, 0); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3411 | |
| 3412 | l2cap_chan_unlock(chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3413 | |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 3414 | chan->ops->close(chan->data); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3415 | |
| 3416 | mutex_unlock(&conn->chan_lock); |
| 3417 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3418 | return 0; |
| 3419 | } |
| 3420 | |
| 3421 | static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3422 | { |
| 3423 | struct l2cap_info_req *req = (struct l2cap_info_req *) data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3424 | u16 type; |
| 3425 | |
| 3426 | type = __le16_to_cpu(req->type); |
| 3427 | |
| 3428 | BT_DBG("type 0x%4.4x", type); |
| 3429 | |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 3430 | if (type == L2CAP_IT_FEAT_MASK) { |
| 3431 | u8 buf[8]; |
Marcel Holtmann | 44dd46d | 2009-05-02 19:09:01 -0700 | [diff] [blame] | 3432 | u32 feat_mask = l2cap_feat_mask; |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 3433 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
| 3434 | rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 3435 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); |
Gustavo F. Padovan | d1c4a17 | 2010-07-18 16:25:54 -0300 | [diff] [blame] | 3436 | if (!disable_ertm) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3437 | feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING |
| 3438 | | L2CAP_FEAT_FCS; |
Andrei Emeltchenko | a5fd6f3 | 2011-09-16 16:26:32 +0300 | [diff] [blame] | 3439 | if (enable_hs) |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 3440 | feat_mask |= L2CAP_FEAT_EXT_FLOW |
| 3441 | | L2CAP_FEAT_EXT_WINDOW; |
Andrei Emeltchenko | a5fd6f3 | 2011-09-16 16:26:32 +0300 | [diff] [blame] | 3442 | |
Gustavo F. Padovan | 1b7bf4e | 2009-08-24 00:45:20 -0300 | [diff] [blame] | 3443 | put_unaligned_le32(feat_mask, rsp->data); |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 3444 | l2cap_send_cmd(conn, cmd->ident, |
| 3445 | L2CAP_INFO_RSP, sizeof(buf), buf); |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 3446 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
| 3447 | u8 buf[12]; |
| 3448 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
Mat Martineau | 50a147c | 2011-11-02 16:18:34 -0700 | [diff] [blame] | 3449 | |
| 3450 | if (enable_hs) |
| 3451 | l2cap_fixed_chan[0] |= L2CAP_FC_A2MP; |
| 3452 | else |
| 3453 | l2cap_fixed_chan[0] &= ~L2CAP_FC_A2MP; |
| 3454 | |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 3455 | rsp->type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); |
| 3456 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); |
Andrei Emeltchenko | c6337ea | 2011-10-20 17:02:44 +0300 | [diff] [blame] | 3457 | memcpy(rsp->data, l2cap_fixed_chan, sizeof(l2cap_fixed_chan)); |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 3458 | l2cap_send_cmd(conn, cmd->ident, |
| 3459 | L2CAP_INFO_RSP, sizeof(buf), buf); |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 3460 | } else { |
| 3461 | struct l2cap_info_rsp rsp; |
| 3462 | rsp.type = cpu_to_le16(type); |
| 3463 | rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP); |
| 3464 | l2cap_send_cmd(conn, cmd->ident, |
| 3465 | L2CAP_INFO_RSP, sizeof(rsp), &rsp); |
| 3466 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3467 | |
| 3468 | return 0; |
| 3469 | } |
| 3470 | |
| 3471 | static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3472 | { |
| 3473 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; |
| 3474 | u16 type, result; |
| 3475 | |
| 3476 | type = __le16_to_cpu(rsp->type); |
| 3477 | result = __le16_to_cpu(rsp->result); |
| 3478 | |
| 3479 | BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); |
| 3480 | |
Andrei Emeltchenko | e90165b | 2011-03-25 11:31:41 +0200 | [diff] [blame] | 3481 | /* L2CAP Info req/rsp are unbound to channels, add extra checks */ |
| 3482 | if (cmd->ident != conn->info_ident || |
| 3483 | conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) |
| 3484 | return 0; |
| 3485 | |
Ulisses Furquim | 17cd3f3 | 2012-01-30 18:26:28 -0200 | [diff] [blame] | 3486 | cancel_delayed_work(&conn->info_timer); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 3487 | |
Ville Tervo | adb08ed | 2010-08-04 09:43:33 +0300 | [diff] [blame] | 3488 | if (result != L2CAP_IR_SUCCESS) { |
| 3489 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
| 3490 | conn->info_ident = 0; |
| 3491 | |
| 3492 | l2cap_conn_start(conn); |
| 3493 | |
| 3494 | return 0; |
| 3495 | } |
| 3496 | |
Andrei Emeltchenko | 978c93b | 2012-02-29 10:41:41 +0200 | [diff] [blame] | 3497 | switch (type) { |
| 3498 | case L2CAP_IT_FEAT_MASK: |
Harvey Harrison | 8398531 | 2008-05-02 16:25:46 -0700 | [diff] [blame] | 3499 | conn->feat_mask = get_unaligned_le32(rsp->data); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 3500 | |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 3501 | if (conn->feat_mask & L2CAP_FEAT_FIXED_CHAN) { |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 3502 | struct l2cap_info_req req; |
| 3503 | req.type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); |
| 3504 | |
| 3505 | conn->info_ident = l2cap_get_ident(conn); |
| 3506 | |
| 3507 | l2cap_send_cmd(conn, conn->info_ident, |
| 3508 | L2CAP_INFO_REQ, sizeof(req), &req); |
| 3509 | } else { |
| 3510 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
| 3511 | conn->info_ident = 0; |
| 3512 | |
| 3513 | l2cap_conn_start(conn); |
| 3514 | } |
Andrei Emeltchenko | 978c93b | 2012-02-29 10:41:41 +0200 | [diff] [blame] | 3515 | break; |
| 3516 | |
| 3517 | case L2CAP_IT_FIXED_CHAN: |
| 3518 | conn->fixed_chan_mask = rsp->data[0]; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 3519 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 3520 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 3521 | |
| 3522 | l2cap_conn_start(conn); |
Andrei Emeltchenko | 978c93b | 2012-02-29 10:41:41 +0200 | [diff] [blame] | 3523 | break; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 3524 | } |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 3525 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3526 | return 0; |
| 3527 | } |
| 3528 | |
Mat Martineau | f94ff6f | 2011-11-02 16:18:32 -0700 | [diff] [blame] | 3529 | static inline int l2cap_create_channel_req(struct l2cap_conn *conn, |
| 3530 | struct l2cap_cmd_hdr *cmd, u16 cmd_len, |
| 3531 | void *data) |
| 3532 | { |
| 3533 | struct l2cap_create_chan_req *req = data; |
| 3534 | struct l2cap_create_chan_rsp rsp; |
| 3535 | u16 psm, scid; |
| 3536 | |
| 3537 | if (cmd_len != sizeof(*req)) |
| 3538 | return -EPROTO; |
| 3539 | |
| 3540 | if (!enable_hs) |
| 3541 | return -EINVAL; |
| 3542 | |
| 3543 | psm = le16_to_cpu(req->psm); |
| 3544 | scid = le16_to_cpu(req->scid); |
| 3545 | |
| 3546 | BT_DBG("psm %d, scid %d, amp_id %d", psm, scid, req->amp_id); |
| 3547 | |
| 3548 | /* Placeholder: Always reject */ |
| 3549 | rsp.dcid = 0; |
| 3550 | rsp.scid = cpu_to_le16(scid); |
Andrei Emeltchenko | 8ce0c49 | 2012-03-12 12:13:09 +0200 | [diff] [blame] | 3551 | rsp.result = __constant_cpu_to_le16(L2CAP_CR_NO_MEM); |
| 3552 | rsp.status = __constant_cpu_to_le16(L2CAP_CS_NO_INFO); |
Mat Martineau | f94ff6f | 2011-11-02 16:18:32 -0700 | [diff] [blame] | 3553 | |
| 3554 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CREATE_CHAN_RSP, |
| 3555 | sizeof(rsp), &rsp); |
| 3556 | |
| 3557 | return 0; |
| 3558 | } |
| 3559 | |
| 3560 | static inline int l2cap_create_channel_rsp(struct l2cap_conn *conn, |
| 3561 | struct l2cap_cmd_hdr *cmd, void *data) |
| 3562 | { |
| 3563 | BT_DBG("conn %p", conn); |
| 3564 | |
| 3565 | return l2cap_connect_rsp(conn, cmd, data); |
| 3566 | } |
| 3567 | |
Mat Martineau | 8d5a04a | 2011-11-02 16:18:35 -0700 | [diff] [blame] | 3568 | static void l2cap_send_move_chan_rsp(struct l2cap_conn *conn, u8 ident, |
| 3569 | u16 icid, u16 result) |
| 3570 | { |
| 3571 | struct l2cap_move_chan_rsp rsp; |
| 3572 | |
| 3573 | BT_DBG("icid %d, result %d", icid, result); |
| 3574 | |
| 3575 | rsp.icid = cpu_to_le16(icid); |
| 3576 | rsp.result = cpu_to_le16(result); |
| 3577 | |
| 3578 | l2cap_send_cmd(conn, ident, L2CAP_MOVE_CHAN_RSP, sizeof(rsp), &rsp); |
| 3579 | } |
| 3580 | |
| 3581 | static void l2cap_send_move_chan_cfm(struct l2cap_conn *conn, |
| 3582 | struct l2cap_chan *chan, u16 icid, u16 result) |
| 3583 | { |
| 3584 | struct l2cap_move_chan_cfm cfm; |
| 3585 | u8 ident; |
| 3586 | |
| 3587 | BT_DBG("icid %d, result %d", icid, result); |
| 3588 | |
| 3589 | ident = l2cap_get_ident(conn); |
| 3590 | if (chan) |
| 3591 | chan->ident = ident; |
| 3592 | |
| 3593 | cfm.icid = cpu_to_le16(icid); |
| 3594 | cfm.result = cpu_to_le16(result); |
| 3595 | |
| 3596 | l2cap_send_cmd(conn, ident, L2CAP_MOVE_CHAN_CFM, sizeof(cfm), &cfm); |
| 3597 | } |
| 3598 | |
| 3599 | static void l2cap_send_move_chan_cfm_rsp(struct l2cap_conn *conn, u8 ident, |
| 3600 | u16 icid) |
| 3601 | { |
| 3602 | struct l2cap_move_chan_cfm_rsp rsp; |
| 3603 | |
| 3604 | BT_DBG("icid %d", icid); |
| 3605 | |
| 3606 | rsp.icid = cpu_to_le16(icid); |
| 3607 | l2cap_send_cmd(conn, ident, L2CAP_MOVE_CHAN_CFM_RSP, sizeof(rsp), &rsp); |
| 3608 | } |
| 3609 | |
| 3610 | static inline int l2cap_move_channel_req(struct l2cap_conn *conn, |
| 3611 | struct l2cap_cmd_hdr *cmd, u16 cmd_len, void *data) |
| 3612 | { |
| 3613 | struct l2cap_move_chan_req *req = data; |
| 3614 | u16 icid = 0; |
| 3615 | u16 result = L2CAP_MR_NOT_ALLOWED; |
| 3616 | |
| 3617 | if (cmd_len != sizeof(*req)) |
| 3618 | return -EPROTO; |
| 3619 | |
| 3620 | icid = le16_to_cpu(req->icid); |
| 3621 | |
| 3622 | BT_DBG("icid %d, dest_amp_id %d", icid, req->dest_amp_id); |
| 3623 | |
| 3624 | if (!enable_hs) |
| 3625 | return -EINVAL; |
| 3626 | |
| 3627 | /* Placeholder: Always refuse */ |
| 3628 | l2cap_send_move_chan_rsp(conn, cmd->ident, icid, result); |
| 3629 | |
| 3630 | return 0; |
| 3631 | } |
| 3632 | |
| 3633 | static inline int l2cap_move_channel_rsp(struct l2cap_conn *conn, |
| 3634 | struct l2cap_cmd_hdr *cmd, u16 cmd_len, void *data) |
| 3635 | { |
| 3636 | struct l2cap_move_chan_rsp *rsp = data; |
| 3637 | u16 icid, result; |
| 3638 | |
| 3639 | if (cmd_len != sizeof(*rsp)) |
| 3640 | return -EPROTO; |
| 3641 | |
| 3642 | icid = le16_to_cpu(rsp->icid); |
| 3643 | result = le16_to_cpu(rsp->result); |
| 3644 | |
| 3645 | BT_DBG("icid %d, result %d", icid, result); |
| 3646 | |
| 3647 | /* Placeholder: Always unconfirmed */ |
| 3648 | l2cap_send_move_chan_cfm(conn, NULL, icid, L2CAP_MC_UNCONFIRMED); |
| 3649 | |
| 3650 | return 0; |
| 3651 | } |
| 3652 | |
| 3653 | static inline int l2cap_move_channel_confirm(struct l2cap_conn *conn, |
| 3654 | struct l2cap_cmd_hdr *cmd, u16 cmd_len, void *data) |
| 3655 | { |
| 3656 | struct l2cap_move_chan_cfm *cfm = data; |
| 3657 | u16 icid, result; |
| 3658 | |
| 3659 | if (cmd_len != sizeof(*cfm)) |
| 3660 | return -EPROTO; |
| 3661 | |
| 3662 | icid = le16_to_cpu(cfm->icid); |
| 3663 | result = le16_to_cpu(cfm->result); |
| 3664 | |
| 3665 | BT_DBG("icid %d, result %d", icid, result); |
| 3666 | |
| 3667 | l2cap_send_move_chan_cfm_rsp(conn, cmd->ident, icid); |
| 3668 | |
| 3669 | return 0; |
| 3670 | } |
| 3671 | |
| 3672 | static inline int l2cap_move_channel_confirm_rsp(struct l2cap_conn *conn, |
| 3673 | struct l2cap_cmd_hdr *cmd, u16 cmd_len, void *data) |
| 3674 | { |
| 3675 | struct l2cap_move_chan_cfm_rsp *rsp = data; |
| 3676 | u16 icid; |
| 3677 | |
| 3678 | if (cmd_len != sizeof(*rsp)) |
| 3679 | return -EPROTO; |
| 3680 | |
| 3681 | icid = le16_to_cpu(rsp->icid); |
| 3682 | |
| 3683 | BT_DBG("icid %d", icid); |
| 3684 | |
| 3685 | return 0; |
| 3686 | } |
| 3687 | |
Gustavo F. Padovan | e2174ca | 2011-02-17 19:16:55 -0300 | [diff] [blame] | 3688 | 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] | 3689 | u16 to_multiplier) |
| 3690 | { |
| 3691 | u16 max_latency; |
| 3692 | |
| 3693 | if (min > max || min < 6 || max > 3200) |
| 3694 | return -EINVAL; |
| 3695 | |
| 3696 | if (to_multiplier < 10 || to_multiplier > 3200) |
| 3697 | return -EINVAL; |
| 3698 | |
| 3699 | if (max >= to_multiplier * 8) |
| 3700 | return -EINVAL; |
| 3701 | |
| 3702 | max_latency = (to_multiplier * 8 / max) - 1; |
| 3703 | if (latency > 499 || latency > max_latency) |
| 3704 | return -EINVAL; |
| 3705 | |
| 3706 | return 0; |
| 3707 | } |
| 3708 | |
| 3709 | static inline int l2cap_conn_param_update_req(struct l2cap_conn *conn, |
| 3710 | struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3711 | { |
| 3712 | struct hci_conn *hcon = conn->hcon; |
| 3713 | struct l2cap_conn_param_update_req *req; |
| 3714 | struct l2cap_conn_param_update_rsp rsp; |
| 3715 | u16 min, max, latency, to_multiplier, cmd_len; |
Claudio Takahasi | 2ce603e | 2011-02-16 20:44:53 -0200 | [diff] [blame] | 3716 | int err; |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 3717 | |
| 3718 | if (!(hcon->link_mode & HCI_LM_MASTER)) |
| 3719 | return -EINVAL; |
| 3720 | |
| 3721 | cmd_len = __le16_to_cpu(cmd->len); |
| 3722 | if (cmd_len != sizeof(struct l2cap_conn_param_update_req)) |
| 3723 | return -EPROTO; |
| 3724 | |
| 3725 | req = (struct l2cap_conn_param_update_req *) data; |
Gustavo F. Padovan | e2174ca | 2011-02-17 19:16:55 -0300 | [diff] [blame] | 3726 | min = __le16_to_cpu(req->min); |
| 3727 | max = __le16_to_cpu(req->max); |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 3728 | latency = __le16_to_cpu(req->latency); |
| 3729 | to_multiplier = __le16_to_cpu(req->to_multiplier); |
| 3730 | |
| 3731 | BT_DBG("min 0x%4.4x max 0x%4.4x latency: 0x%4.4x Timeout: 0x%4.4x", |
| 3732 | min, max, latency, to_multiplier); |
| 3733 | |
| 3734 | memset(&rsp, 0, sizeof(rsp)); |
Claudio Takahasi | 2ce603e | 2011-02-16 20:44:53 -0200 | [diff] [blame] | 3735 | |
| 3736 | err = l2cap_check_conn_param(min, max, latency, to_multiplier); |
| 3737 | if (err) |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 3738 | rsp.result = cpu_to_le16(L2CAP_CONN_PARAM_REJECTED); |
| 3739 | else |
| 3740 | rsp.result = cpu_to_le16(L2CAP_CONN_PARAM_ACCEPTED); |
| 3741 | |
| 3742 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_PARAM_UPDATE_RSP, |
| 3743 | sizeof(rsp), &rsp); |
| 3744 | |
Claudio Takahasi | 2ce603e | 2011-02-16 20:44:53 -0200 | [diff] [blame] | 3745 | if (!err) |
| 3746 | hci_le_conn_update(hcon, min, max, latency, to_multiplier); |
| 3747 | |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 3748 | return 0; |
| 3749 | } |
| 3750 | |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 3751 | static inline int l2cap_bredr_sig_cmd(struct l2cap_conn *conn, |
| 3752 | struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data) |
| 3753 | { |
| 3754 | int err = 0; |
| 3755 | |
| 3756 | switch (cmd->code) { |
| 3757 | case L2CAP_COMMAND_REJ: |
| 3758 | l2cap_command_rej(conn, cmd, data); |
| 3759 | break; |
| 3760 | |
| 3761 | case L2CAP_CONN_REQ: |
| 3762 | err = l2cap_connect_req(conn, cmd, data); |
| 3763 | break; |
| 3764 | |
| 3765 | case L2CAP_CONN_RSP: |
| 3766 | err = l2cap_connect_rsp(conn, cmd, data); |
| 3767 | break; |
| 3768 | |
| 3769 | case L2CAP_CONF_REQ: |
| 3770 | err = l2cap_config_req(conn, cmd, cmd_len, data); |
| 3771 | break; |
| 3772 | |
| 3773 | case L2CAP_CONF_RSP: |
| 3774 | err = l2cap_config_rsp(conn, cmd, data); |
| 3775 | break; |
| 3776 | |
| 3777 | case L2CAP_DISCONN_REQ: |
| 3778 | err = l2cap_disconnect_req(conn, cmd, data); |
| 3779 | break; |
| 3780 | |
| 3781 | case L2CAP_DISCONN_RSP: |
| 3782 | err = l2cap_disconnect_rsp(conn, cmd, data); |
| 3783 | break; |
| 3784 | |
| 3785 | case L2CAP_ECHO_REQ: |
| 3786 | l2cap_send_cmd(conn, cmd->ident, L2CAP_ECHO_RSP, cmd_len, data); |
| 3787 | break; |
| 3788 | |
| 3789 | case L2CAP_ECHO_RSP: |
| 3790 | break; |
| 3791 | |
| 3792 | case L2CAP_INFO_REQ: |
| 3793 | err = l2cap_information_req(conn, cmd, data); |
| 3794 | break; |
| 3795 | |
| 3796 | case L2CAP_INFO_RSP: |
| 3797 | err = l2cap_information_rsp(conn, cmd, data); |
| 3798 | break; |
| 3799 | |
Mat Martineau | f94ff6f | 2011-11-02 16:18:32 -0700 | [diff] [blame] | 3800 | case L2CAP_CREATE_CHAN_REQ: |
| 3801 | err = l2cap_create_channel_req(conn, cmd, cmd_len, data); |
| 3802 | break; |
| 3803 | |
| 3804 | case L2CAP_CREATE_CHAN_RSP: |
| 3805 | err = l2cap_create_channel_rsp(conn, cmd, data); |
| 3806 | break; |
| 3807 | |
Mat Martineau | 8d5a04a | 2011-11-02 16:18:35 -0700 | [diff] [blame] | 3808 | case L2CAP_MOVE_CHAN_REQ: |
| 3809 | err = l2cap_move_channel_req(conn, cmd, cmd_len, data); |
| 3810 | break; |
| 3811 | |
| 3812 | case L2CAP_MOVE_CHAN_RSP: |
| 3813 | err = l2cap_move_channel_rsp(conn, cmd, cmd_len, data); |
| 3814 | break; |
| 3815 | |
| 3816 | case L2CAP_MOVE_CHAN_CFM: |
| 3817 | err = l2cap_move_channel_confirm(conn, cmd, cmd_len, data); |
| 3818 | break; |
| 3819 | |
| 3820 | case L2CAP_MOVE_CHAN_CFM_RSP: |
| 3821 | err = l2cap_move_channel_confirm_rsp(conn, cmd, cmd_len, data); |
| 3822 | break; |
| 3823 | |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 3824 | default: |
| 3825 | BT_ERR("Unknown BR/EDR signaling command 0x%2.2x", cmd->code); |
| 3826 | err = -EINVAL; |
| 3827 | break; |
| 3828 | } |
| 3829 | |
| 3830 | return err; |
| 3831 | } |
| 3832 | |
| 3833 | static inline int l2cap_le_sig_cmd(struct l2cap_conn *conn, |
| 3834 | struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3835 | { |
| 3836 | switch (cmd->code) { |
| 3837 | case L2CAP_COMMAND_REJ: |
| 3838 | return 0; |
| 3839 | |
| 3840 | case L2CAP_CONN_PARAM_UPDATE_REQ: |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 3841 | return l2cap_conn_param_update_req(conn, cmd, data); |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 3842 | |
| 3843 | case L2CAP_CONN_PARAM_UPDATE_RSP: |
| 3844 | return 0; |
| 3845 | |
| 3846 | default: |
| 3847 | BT_ERR("Unknown LE signaling command 0x%2.2x", cmd->code); |
| 3848 | return -EINVAL; |
| 3849 | } |
| 3850 | } |
| 3851 | |
| 3852 | static inline void l2cap_sig_channel(struct l2cap_conn *conn, |
| 3853 | struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3854 | { |
| 3855 | u8 *data = skb->data; |
| 3856 | int len = skb->len; |
| 3857 | struct l2cap_cmd_hdr cmd; |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 3858 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3859 | |
| 3860 | l2cap_raw_recv(conn, skb); |
| 3861 | |
| 3862 | while (len >= L2CAP_CMD_HDR_SIZE) { |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3863 | u16 cmd_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3864 | memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); |
| 3865 | data += L2CAP_CMD_HDR_SIZE; |
| 3866 | len -= L2CAP_CMD_HDR_SIZE; |
| 3867 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3868 | cmd_len = le16_to_cpu(cmd.len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3869 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3870 | 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] | 3871 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3872 | if (cmd_len > len || !cmd.ident) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3873 | BT_DBG("corrupted command"); |
| 3874 | break; |
| 3875 | } |
| 3876 | |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 3877 | if (conn->hcon->type == LE_LINK) |
| 3878 | err = l2cap_le_sig_cmd(conn, &cmd, data); |
| 3879 | else |
| 3880 | err = l2cap_bredr_sig_cmd(conn, &cmd, cmd_len, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3881 | |
| 3882 | if (err) { |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 3883 | struct l2cap_cmd_rej_unk rej; |
Gustavo F. Padovan | 2c6d1a2 | 2011-03-23 14:38:32 -0300 | [diff] [blame] | 3884 | |
| 3885 | BT_ERR("Wrong link type (%d)", err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3886 | |
| 3887 | /* FIXME: Map err to a valid reason */ |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 3888 | rej.reason = cpu_to_le16(L2CAP_REJ_NOT_UNDERSTOOD); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3889 | l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); |
| 3890 | } |
| 3891 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3892 | data += cmd_len; |
| 3893 | len -= cmd_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3894 | } |
| 3895 | |
| 3896 | kfree_skb(skb); |
| 3897 | } |
| 3898 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3899 | 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] | 3900 | { |
| 3901 | u16 our_fcs, rcv_fcs; |
Andrei Emeltchenko | e4ca6d9 | 2011-10-11 13:37:52 +0300 | [diff] [blame] | 3902 | int hdr_size; |
| 3903 | |
| 3904 | if (test_bit(FLAG_EXT_CTRL, &chan->flags)) |
| 3905 | hdr_size = L2CAP_EXT_HDR_SIZE; |
| 3906 | else |
| 3907 | hdr_size = L2CAP_ENH_HDR_SIZE; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3908 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3909 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 3910 | skb_trim(skb, skb->len - L2CAP_FCS_SIZE); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3911 | rcv_fcs = get_unaligned_le16(skb->data + skb->len); |
| 3912 | our_fcs = crc16(0, skb->data - hdr_size, skb->len + hdr_size); |
| 3913 | |
| 3914 | if (our_fcs != rcv_fcs) |
João Paulo Rechi Vita | 7a560e5 | 2010-06-22 13:56:27 -0300 | [diff] [blame] | 3915 | return -EBADMSG; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3916 | } |
| 3917 | return 0; |
| 3918 | } |
| 3919 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3920 | 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] | 3921 | { |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 3922 | u32 control = 0; |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3923 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3924 | chan->frames_sent = 0; |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3925 | |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 3926 | control |= __set_reqseq(chan, chan->buffer_seq); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3927 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3928 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 3929 | control |= __set_ctrl_super(chan, L2CAP_SUPER_RNR); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3930 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3931 | set_bit(CONN_RNR_SENT, &chan->conn_state); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3932 | } |
| 3933 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3934 | if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3935 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3936 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3937 | l2cap_ertm_send(chan); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3938 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3939 | if (!test_bit(CONN_LOCAL_BUSY, &chan->conn_state) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3940 | chan->frames_sent == 0) { |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 3941 | control |= __set_ctrl_super(chan, L2CAP_SUPER_RR); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3942 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3943 | } |
| 3944 | } |
| 3945 | |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 3946 | 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] | 3947 | { |
| 3948 | struct sk_buff *next_skb; |
João Paulo Rechi Vita | bfbacc1 | 2010-05-31 18:35:44 -0300 | [diff] [blame] | 3949 | int tx_seq_offset, next_tx_seq_offset; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3950 | |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 3951 | bt_cb(skb)->control.txseq = tx_seq; |
| 3952 | bt_cb(skb)->control.sar = sar; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3953 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3954 | next_skb = skb_peek(&chan->srej_q); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3955 | |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 3956 | 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] | 3957 | |
Szymon Janc | 039d957 | 2011-11-16 09:32:19 +0100 | [diff] [blame] | 3958 | while (next_skb) { |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 3959 | if (bt_cb(next_skb)->control.txseq == tx_seq) |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3960 | return -EINVAL; |
| 3961 | |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 3962 | next_tx_seq_offset = __seq_offset(chan, |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 3963 | bt_cb(next_skb)->control.txseq, chan->buffer_seq); |
João Paulo Rechi Vita | bfbacc1 | 2010-05-31 18:35:44 -0300 | [diff] [blame] | 3964 | |
| 3965 | if (next_tx_seq_offset > tx_seq_offset) { |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3966 | __skb_queue_before(&chan->srej_q, next_skb, skb); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3967 | return 0; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3968 | } |
| 3969 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3970 | if (skb_queue_is_last(&chan->srej_q, next_skb)) |
Szymon Janc | 039d957 | 2011-11-16 09:32:19 +0100 | [diff] [blame] | 3971 | next_skb = NULL; |
| 3972 | else |
| 3973 | next_skb = skb_queue_next(&chan->srej_q, next_skb); |
| 3974 | } |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3975 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3976 | __skb_queue_tail(&chan->srej_q, skb); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3977 | |
| 3978 | return 0; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3979 | } |
| 3980 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3981 | static void append_skb_frag(struct sk_buff *skb, |
| 3982 | struct sk_buff *new_frag, struct sk_buff **last_frag) |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3983 | { |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3984 | /* skb->len reflects data in skb as well as all fragments |
| 3985 | * skb->data_len reflects only data in fragments |
| 3986 | */ |
| 3987 | if (!skb_has_frag_list(skb)) |
| 3988 | skb_shinfo(skb)->frag_list = new_frag; |
| 3989 | |
| 3990 | new_frag->next = NULL; |
| 3991 | |
| 3992 | (*last_frag)->next = new_frag; |
| 3993 | *last_frag = new_frag; |
| 3994 | |
| 3995 | skb->len += new_frag->len; |
| 3996 | skb->data_len += new_frag->len; |
| 3997 | skb->truesize += new_frag->truesize; |
| 3998 | } |
| 3999 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4000 | 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] | 4001 | { |
| 4002 | int err = -EINVAL; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4003 | |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 4004 | switch (__get_ctrl_sar(chan, control)) { |
| 4005 | case L2CAP_SAR_UNSEGMENTED: |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4006 | if (chan->sdu) |
| 4007 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4008 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4009 | err = chan->ops->recv(chan->data, skb); |
| 4010 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4011 | |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 4012 | case L2CAP_SAR_START: |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4013 | if (chan->sdu) |
| 4014 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4015 | |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 4016 | chan->sdu_len = get_unaligned_le16(skb->data); |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 4017 | skb_pull(skb, L2CAP_SDULEN_SIZE); |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4018 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4019 | if (chan->sdu_len > chan->imtu) { |
| 4020 | err = -EMSGSIZE; |
| 4021 | break; |
| 4022 | } |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4023 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4024 | if (skb->len >= chan->sdu_len) |
| 4025 | break; |
| 4026 | |
| 4027 | chan->sdu = skb; |
| 4028 | chan->sdu_last_frag = skb; |
| 4029 | |
| 4030 | skb = NULL; |
| 4031 | err = 0; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4032 | break; |
| 4033 | |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 4034 | case L2CAP_SAR_CONTINUE: |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 4035 | if (!chan->sdu) |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4036 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4037 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4038 | append_skb_frag(chan->sdu, skb, |
| 4039 | &chan->sdu_last_frag); |
| 4040 | skb = NULL; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4041 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4042 | if (chan->sdu->len >= chan->sdu_len) |
| 4043 | break; |
Gustavo F. Padovan | 4178ba4 | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 4044 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4045 | err = 0; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4046 | break; |
| 4047 | |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 4048 | case L2CAP_SAR_END: |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 4049 | if (!chan->sdu) |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4050 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4051 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4052 | append_skb_frag(chan->sdu, skb, |
| 4053 | &chan->sdu_last_frag); |
| 4054 | skb = NULL; |
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 | if (chan->sdu->len != chan->sdu_len) |
| 4057 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4058 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4059 | err = chan->ops->recv(chan->data, chan->sdu); |
Gustavo F. Padovan | 4178ba4 | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 4060 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4061 | if (!err) { |
| 4062 | /* Reassembly complete */ |
| 4063 | chan->sdu = NULL; |
| 4064 | chan->sdu_last_frag = NULL; |
| 4065 | chan->sdu_len = 0; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4066 | } |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4067 | break; |
| 4068 | } |
| 4069 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4070 | if (err) { |
| 4071 | kfree_skb(skb); |
| 4072 | kfree_skb(chan->sdu); |
| 4073 | chan->sdu = NULL; |
| 4074 | chan->sdu_last_frag = NULL; |
| 4075 | chan->sdu_len = 0; |
| 4076 | } |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4077 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4078 | return err; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4079 | } |
| 4080 | |
Mat Martineau | 26f880d | 2011-07-07 09:39:01 -0700 | [diff] [blame] | 4081 | static void l2cap_ertm_enter_local_busy(struct l2cap_chan *chan) |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4082 | { |
Mat Martineau | 26f880d | 2011-07-07 09:39:01 -0700 | [diff] [blame] | 4083 | BT_DBG("chan %p, Enter local busy", chan); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4084 | |
Mat Martineau | 26f880d | 2011-07-07 09:39:01 -0700 | [diff] [blame] | 4085 | set_bit(CONN_LOCAL_BUSY, &chan->conn_state); |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 4086 | l2cap_seq_list_clear(&chan->srej_list); |
Mat Martineau | 26f880d | 2011-07-07 09:39:01 -0700 | [diff] [blame] | 4087 | |
Szymon Janc | 77f918b | 2012-01-11 10:59:48 +0100 | [diff] [blame] | 4088 | __set_ack_timer(chan); |
Mat Martineau | 26f880d | 2011-07-07 09:39:01 -0700 | [diff] [blame] | 4089 | } |
| 4090 | |
| 4091 | static void l2cap_ertm_exit_local_busy(struct l2cap_chan *chan) |
| 4092 | { |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4093 | u32 control; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4094 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4095 | if (!test_bit(CONN_RNR_SENT, &chan->conn_state)) |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4096 | goto done; |
| 4097 | |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 4098 | control = __set_reqseq(chan, chan->buffer_seq); |
Andrei Emeltchenko | e378173 | 2011-10-11 13:37:50 +0300 | [diff] [blame] | 4099 | control |= __set_ctrl_poll(chan); |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 4100 | control |= __set_ctrl_super(chan, L2CAP_SUPER_RR); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4101 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 4102 | chan->retry_count = 1; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4103 | |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 4104 | __clear_retrans_timer(chan); |
| 4105 | __set_monitor_timer(chan); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4106 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4107 | set_bit(CONN_WAIT_F, &chan->conn_state); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4108 | |
| 4109 | done: |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4110 | clear_bit(CONN_LOCAL_BUSY, &chan->conn_state); |
| 4111 | clear_bit(CONN_RNR_SENT, &chan->conn_state); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4112 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 4113 | BT_DBG("chan %p, Exit local busy", chan); |
Gustavo F. Padovan | 712132e | 2010-06-21 19:39:50 -0300 | [diff] [blame] | 4114 | } |
| 4115 | |
Mat Martineau | e328140 | 2011-07-07 09:39:02 -0700 | [diff] [blame] | 4116 | void l2cap_chan_busy(struct l2cap_chan *chan, int busy) |
Gustavo F. Padovan | 712132e | 2010-06-21 19:39:50 -0300 | [diff] [blame] | 4117 | { |
Mat Martineau | e328140 | 2011-07-07 09:39:02 -0700 | [diff] [blame] | 4118 | if (chan->mode == L2CAP_MODE_ERTM) { |
| 4119 | if (busy) |
| 4120 | l2cap_ertm_enter_local_busy(chan); |
| 4121 | else |
| 4122 | l2cap_ertm_exit_local_busy(chan); |
Gustavo F. Padovan | 712132e | 2010-06-21 19:39:50 -0300 | [diff] [blame] | 4123 | } |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4124 | } |
| 4125 | |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 4126 | 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] | 4127 | { |
| 4128 | struct sk_buff *skb; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4129 | u32 control; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4130 | |
Mat Martineau | e328140 | 2011-07-07 09:39:02 -0700 | [diff] [blame] | 4131 | while ((skb = skb_peek(&chan->srej_q)) && |
| 4132 | !test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
| 4133 | int err; |
| 4134 | |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 4135 | if (bt_cb(skb)->control.txseq != tx_seq) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4136 | break; |
| 4137 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 4138 | skb = skb_dequeue(&chan->srej_q); |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 4139 | control = __set_ctrl_sar(chan, bt_cb(skb)->control.sar); |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4140 | err = l2cap_reassemble_sdu(chan, skb, control); |
Mat Martineau | e328140 | 2011-07-07 09:39:02 -0700 | [diff] [blame] | 4141 | |
| 4142 | if (err < 0) { |
| 4143 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
| 4144 | break; |
| 4145 | } |
| 4146 | |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 4147 | chan->buffer_seq_srej = __next_seq(chan, chan->buffer_seq_srej); |
| 4148 | tx_seq = __next_seq(chan, tx_seq); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4149 | } |
| 4150 | } |
| 4151 | |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 4152 | 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] | 4153 | { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4154 | struct srej_list *l, *tmp; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4155 | u32 control; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4156 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 4157 | list_for_each_entry_safe(l, tmp, &chan->srej_l, list) { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4158 | if (l->tx_seq == tx_seq) { |
| 4159 | list_del(&l->list); |
| 4160 | kfree(l); |
| 4161 | return; |
| 4162 | } |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 4163 | control = __set_ctrl_super(chan, L2CAP_SUPER_SREJ); |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 4164 | control |= __set_reqseq(chan, l->tx_seq); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4165 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4166 | list_del(&l->list); |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 4167 | list_add_tail(&l->list, &chan->srej_l); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4168 | } |
| 4169 | } |
| 4170 | |
Szymon Janc | aef89f2 | 2011-11-16 09:32:18 +0100 | [diff] [blame] | 4171 | 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] | 4172 | { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4173 | struct srej_list *new; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4174 | u32 control; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4175 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 4176 | while (tx_seq != chan->expected_tx_seq) { |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 4177 | control = __set_ctrl_super(chan, L2CAP_SUPER_SREJ); |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 4178 | control |= __set_reqseq(chan, chan->expected_tx_seq); |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 4179 | l2cap_seq_list_append(&chan->srej_list, chan->expected_tx_seq); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4180 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4181 | |
| 4182 | new = kzalloc(sizeof(struct srej_list), GFP_ATOMIC); |
Szymon Janc | aef89f2 | 2011-11-16 09:32:18 +0100 | [diff] [blame] | 4183 | if (!new) |
| 4184 | return -ENOMEM; |
| 4185 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 4186 | new->tx_seq = chan->expected_tx_seq; |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 4187 | |
| 4188 | chan->expected_tx_seq = __next_seq(chan, chan->expected_tx_seq); |
| 4189 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 4190 | list_add_tail(&new->list, &chan->srej_l); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4191 | } |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 4192 | |
| 4193 | chan->expected_tx_seq = __next_seq(chan, chan->expected_tx_seq); |
Szymon Janc | aef89f2 | 2011-11-16 09:32:18 +0100 | [diff] [blame] | 4194 | |
| 4195 | return 0; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4196 | } |
| 4197 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4198 | 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] | 4199 | { |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 4200 | u16 tx_seq = __get_txseq(chan, rx_control); |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 4201 | u16 req_seq = __get_reqseq(chan, rx_control); |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 4202 | u8 sar = __get_ctrl_sar(chan, rx_control); |
Gustavo F. Padovan | f6337c7 | 2010-05-10 18:32:04 -0300 | [diff] [blame] | 4203 | int tx_seq_offset, expected_tx_seq_offset; |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 4204 | int num_to_ack = (chan->tx_win/6) + 1; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4205 | int err = 0; |
| 4206 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4207 | 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] | 4208 | tx_seq, rx_control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4209 | |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 4210 | if (__is_ctrl_final(chan, rx_control) && |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4211 | test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 4212 | __clear_monitor_timer(chan); |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 4213 | if (chan->unacked_frames > 0) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 4214 | __set_retrans_timer(chan); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4215 | clear_bit(CONN_WAIT_F, &chan->conn_state); |
Gustavo F. Padovan | 1d8f5d1 | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 4216 | } |
| 4217 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 4218 | chan->expected_ack_seq = req_seq; |
| 4219 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | 9f121a5 | 2009-10-03 02:34:38 -0300 | [diff] [blame] | 4220 | |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 4221 | 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] | 4222 | |
| 4223 | /* invalid tx_seq */ |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 4224 | if (tx_seq_offset >= chan->tx_win) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 4225 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4226 | goto drop; |
| 4227 | } |
| 4228 | |
Szymon Janc | 77f918b | 2012-01-11 10:59:48 +0100 | [diff] [blame] | 4229 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
| 4230 | if (!test_bit(CONN_RNR_SENT, &chan->conn_state)) |
| 4231 | l2cap_send_ack(chan); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4232 | goto drop; |
Szymon Janc | 77f918b | 2012-01-11 10:59:48 +0100 | [diff] [blame] | 4233 | } |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4234 | |
Mat Martineau | 02f1b64 | 2011-06-29 14:35:19 -0700 | [diff] [blame] | 4235 | if (tx_seq == chan->expected_tx_seq) |
| 4236 | goto expected; |
| 4237 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4238 | if (test_bit(CONN_SREJ_SENT, &chan->conn_state)) { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4239 | struct srej_list *first; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4240 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 4241 | first = list_first_entry(&chan->srej_l, |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4242 | struct srej_list, list); |
| 4243 | if (tx_seq == first->tx_seq) { |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 4244 | l2cap_add_to_srej_queue(chan, skb, tx_seq, sar); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4245 | l2cap_check_srej_gap(chan, tx_seq); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4246 | |
| 4247 | list_del(&first->list); |
| 4248 | kfree(first); |
| 4249 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 4250 | if (list_empty(&chan->srej_l)) { |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 4251 | chan->buffer_seq = chan->buffer_seq_srej; |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4252 | clear_bit(CONN_SREJ_SENT, &chan->conn_state); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4253 | l2cap_send_ack(chan); |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 4254 | BT_DBG("chan %p, Exit SREJ_SENT", chan); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4255 | } |
| 4256 | } else { |
| 4257 | struct srej_list *l; |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4258 | |
| 4259 | /* duplicated tx_seq */ |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 4260 | 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] | 4261 | goto drop; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4262 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 4263 | list_for_each_entry(l, &chan->srej_l, list) { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4264 | if (l->tx_seq == tx_seq) { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4265 | l2cap_resend_srejframe(chan, tx_seq); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4266 | return 0; |
| 4267 | } |
| 4268 | } |
Szymon Janc | aef89f2 | 2011-11-16 09:32:18 +0100 | [diff] [blame] | 4269 | |
| 4270 | err = l2cap_send_srejframe(chan, tx_seq); |
| 4271 | if (err < 0) { |
| 4272 | l2cap_send_disconn_req(chan->conn, chan, -err); |
| 4273 | return err; |
| 4274 | } |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 4275 | } |
| 4276 | } else { |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 4277 | expected_tx_seq_offset = __seq_offset(chan, |
| 4278 | chan->expected_tx_seq, chan->buffer_seq); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4279 | |
| 4280 | /* duplicated tx_seq */ |
| 4281 | if (tx_seq_offset < expected_tx_seq_offset) |
| 4282 | goto drop; |
| 4283 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4284 | set_bit(CONN_SREJ_SENT, &chan->conn_state); |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 4285 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 4286 | BT_DBG("chan %p, Enter SREJ", chan); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 4287 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 4288 | INIT_LIST_HEAD(&chan->srej_l); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 4289 | chan->buffer_seq_srej = chan->buffer_seq; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4290 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 4291 | __skb_queue_head_init(&chan->srej_q); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 4292 | l2cap_add_to_srej_queue(chan, skb, tx_seq, sar); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4293 | |
Szymon Janc | 0ef3ef0 | 2012-01-11 10:59:46 +0100 | [diff] [blame] | 4294 | /* Set P-bit only if there are some I-frames to ack. */ |
| 4295 | if (__clear_ack_timer(chan)) |
| 4296 | set_bit(CONN_SEND_PBIT, &chan->conn_state); |
Gustavo F. Padovan | ef54fd9 | 2009-08-20 22:26:04 -0300 | [diff] [blame] | 4297 | |
Szymon Janc | aef89f2 | 2011-11-16 09:32:18 +0100 | [diff] [blame] | 4298 | err = l2cap_send_srejframe(chan, tx_seq); |
| 4299 | if (err < 0) { |
| 4300 | l2cap_send_disconn_req(chan->conn, chan, -err); |
| 4301 | return err; |
| 4302 | } |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4303 | } |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 4304 | return 0; |
| 4305 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4306 | expected: |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 4307 | chan->expected_tx_seq = __next_seq(chan, chan->expected_tx_seq); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4308 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4309 | if (test_bit(CONN_SREJ_SENT, &chan->conn_state)) { |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 4310 | bt_cb(skb)->control.txseq = tx_seq; |
| 4311 | bt_cb(skb)->control.sar = sar; |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 4312 | __skb_queue_tail(&chan->srej_q, skb); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4313 | return 0; |
| 4314 | } |
| 4315 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4316 | err = l2cap_reassemble_sdu(chan, skb, rx_control); |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 4317 | chan->buffer_seq = __next_seq(chan, chan->buffer_seq); |
| 4318 | |
Mat Martineau | e328140 | 2011-07-07 09:39:02 -0700 | [diff] [blame] | 4319 | if (err < 0) { |
| 4320 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
| 4321 | return err; |
| 4322 | } |
Gustavo F. Padovan | 2ece368 | 2010-06-16 17:21:44 -0300 | [diff] [blame] | 4323 | |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 4324 | if (__is_ctrl_final(chan, rx_control)) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4325 | if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4326 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | 4ec10d9 | 2009-10-03 02:34:39 -0300 | [diff] [blame] | 4327 | } |
| 4328 | |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 4329 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 4330 | chan->num_acked = (chan->num_acked + 1) % num_to_ack; |
| 4331 | if (chan->num_acked == num_to_ack - 1) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4332 | l2cap_send_ack(chan); |
Gustavo F. Padovan | 4d611e4 | 2011-06-23 19:30:48 -0300 | [diff] [blame] | 4333 | else |
| 4334 | __set_ack_timer(chan); |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 4335 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4336 | return 0; |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4337 | |
| 4338 | drop: |
| 4339 | kfree_skb(skb); |
| 4340 | return 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4341 | } |
| 4342 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4343 | 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] | 4344 | { |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4345 | BT_DBG("chan %p, req_seq %d ctrl 0x%8.8x", chan, |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 4346 | __get_reqseq(chan, rx_control), rx_control); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 4347 | |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 4348 | chan->expected_ack_seq = __get_reqseq(chan, rx_control); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 4349 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4350 | |
Andrei Emeltchenko | e378173 | 2011-10-11 13:37:50 +0300 | [diff] [blame] | 4351 | if (__is_ctrl_poll(chan, rx_control)) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4352 | set_bit(CONN_SEND_FBIT, &chan->conn_state); |
| 4353 | if (test_bit(CONN_SREJ_SENT, &chan->conn_state)) { |
| 4354 | if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 4355 | (chan->unacked_frames > 0)) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 4356 | __set_retrans_timer(chan); |
Gustavo F. Padovan | 05fbd89 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 4357 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4358 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4359 | l2cap_send_srejtail(chan); |
Gustavo F. Padovan | 05fbd89 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 4360 | } else { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4361 | l2cap_send_i_or_rr_or_rnr(chan); |
Gustavo F. Padovan | 05fbd89 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 4362 | } |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4363 | |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 4364 | } else if (__is_ctrl_final(chan, rx_control)) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4365 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4366 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4367 | if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4368 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4369 | |
| 4370 | } else { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4371 | if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 4372 | (chan->unacked_frames > 0)) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 4373 | __set_retrans_timer(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4374 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4375 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
| 4376 | if (test_bit(CONN_SREJ_SENT, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4377 | l2cap_send_ack(chan); |
Andrei Emeltchenko | 894718a | 2010-12-01 16:58:24 +0200 | [diff] [blame] | 4378 | else |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4379 | l2cap_ertm_send(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4380 | } |
| 4381 | } |
| 4382 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4383 | 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] | 4384 | { |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 4385 | u16 tx_seq = __get_reqseq(chan, rx_control); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4386 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4387 | 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] | 4388 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4389 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4390 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 4391 | chan->expected_ack_seq = tx_seq; |
| 4392 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4393 | |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 4394 | if (__is_ctrl_final(chan, rx_control)) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4395 | if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4396 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4397 | } else { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4398 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4399 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4400 | if (test_bit(CONN_WAIT_F, &chan->conn_state)) |
| 4401 | set_bit(CONN_REJ_ACT, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4402 | } |
| 4403 | } |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4404 | 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] | 4405 | { |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 4406 | u16 tx_seq = __get_reqseq(chan, rx_control); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4407 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4408 | 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] | 4409 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4410 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4411 | |
Andrei Emeltchenko | e378173 | 2011-10-11 13:37:50 +0300 | [diff] [blame] | 4412 | if (__is_ctrl_poll(chan, rx_control)) { |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 4413 | chan->expected_ack_seq = tx_seq; |
| 4414 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 4415 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4416 | set_bit(CONN_SEND_FBIT, &chan->conn_state); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4417 | l2cap_retransmit_one_frame(chan, tx_seq); |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 4418 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4419 | l2cap_ertm_send(chan); |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 4420 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4421 | if (test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 4422 | chan->srej_save_reqseq = tx_seq; |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4423 | set_bit(CONN_SREJ_ACT, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4424 | } |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 4425 | } else if (__is_ctrl_final(chan, rx_control)) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4426 | if (test_bit(CONN_SREJ_ACT, &chan->conn_state) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 4427 | chan->srej_save_reqseq == tx_seq) |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4428 | clear_bit(CONN_SREJ_ACT, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4429 | else |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4430 | l2cap_retransmit_one_frame(chan, tx_seq); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4431 | } else { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4432 | l2cap_retransmit_one_frame(chan, tx_seq); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4433 | if (test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 4434 | chan->srej_save_reqseq = tx_seq; |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4435 | set_bit(CONN_SREJ_ACT, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4436 | } |
| 4437 | } |
| 4438 | } |
| 4439 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4440 | 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] | 4441 | { |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 4442 | u16 tx_seq = __get_reqseq(chan, rx_control); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4443 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4444 | 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] | 4445 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4446 | set_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 4447 | chan->expected_ack_seq = tx_seq; |
| 4448 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4449 | |
Andrei Emeltchenko | e378173 | 2011-10-11 13:37:50 +0300 | [diff] [blame] | 4450 | if (__is_ctrl_poll(chan, rx_control)) |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4451 | set_bit(CONN_SEND_FBIT, &chan->conn_state); |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 4452 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4453 | if (!test_bit(CONN_SREJ_SENT, &chan->conn_state)) { |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 4454 | __clear_retrans_timer(chan); |
Andrei Emeltchenko | e378173 | 2011-10-11 13:37:50 +0300 | [diff] [blame] | 4455 | if (__is_ctrl_poll(chan, rx_control)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4456 | l2cap_send_rr_or_rnr(chan, L2CAP_CTRL_FINAL); |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4457 | return; |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4458 | } |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4459 | |
Andrei Emeltchenko | e378173 | 2011-10-11 13:37:50 +0300 | [diff] [blame] | 4460 | if (__is_ctrl_poll(chan, rx_control)) { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4461 | l2cap_send_srejtail(chan); |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 4462 | } else { |
| 4463 | rx_control = __set_ctrl_super(chan, L2CAP_SUPER_RR); |
| 4464 | l2cap_send_sframe(chan, rx_control); |
| 4465 | } |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4466 | } |
| 4467 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4468 | 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] | 4469 | { |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4470 | 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] | 4471 | |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 4472 | if (__is_ctrl_final(chan, rx_control) && |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4473 | test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 4474 | __clear_monitor_timer(chan); |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 4475 | if (chan->unacked_frames > 0) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 4476 | __set_retrans_timer(chan); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4477 | clear_bit(CONN_WAIT_F, &chan->conn_state); |
Gustavo F. Padovan | 1d8f5d1 | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 4478 | } |
| 4479 | |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 4480 | switch (__get_ctrl_super(chan, rx_control)) { |
| 4481 | case L2CAP_SUPER_RR: |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4482 | l2cap_data_channel_rrframe(chan, rx_control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4483 | break; |
| 4484 | |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 4485 | case L2CAP_SUPER_REJ: |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4486 | l2cap_data_channel_rejframe(chan, rx_control); |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 4487 | break; |
| 4488 | |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 4489 | case L2CAP_SUPER_SREJ: |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4490 | l2cap_data_channel_srejframe(chan, rx_control); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4491 | break; |
| 4492 | |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 4493 | case L2CAP_SUPER_RNR: |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4494 | l2cap_data_channel_rnrframe(chan, rx_control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4495 | break; |
| 4496 | } |
| 4497 | |
Gustavo F. Padovan | faaebd1 | 2010-05-01 16:15:35 -0300 | [diff] [blame] | 4498 | kfree_skb(skb); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4499 | return 0; |
| 4500 | } |
| 4501 | |
Szymon Janc | cad8f1d | 2012-01-23 10:06:05 +0100 | [diff] [blame] | 4502 | 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] | 4503 | { |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4504 | u32 control; |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 4505 | u16 req_seq; |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4506 | int len, next_tx_seq_offset, req_seq_offset; |
| 4507 | |
Mat Martineau | b76bbd6 | 2012-04-11 10:48:43 -0700 | [diff] [blame] | 4508 | __unpack_control(chan, skb); |
| 4509 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4510 | control = __get_control(chan, skb->data); |
| 4511 | skb_pull(skb, __ctrl_size(chan)); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4512 | len = skb->len; |
| 4513 | |
| 4514 | /* |
| 4515 | * We can just drop the corrupted I-frame here. |
| 4516 | * Receiver will miss it and start proper recovery |
| 4517 | * procedures and ask retransmission. |
| 4518 | */ |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 4519 | if (l2cap_check_fcs(chan, skb)) |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4520 | goto drop; |
| 4521 | |
Andrei Emeltchenko | 793c2f1 | 2011-10-11 13:37:48 +0300 | [diff] [blame] | 4522 | if (__is_sar_start(chan, control) && !__is_sframe(chan, control)) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 4523 | len -= L2CAP_SDULEN_SIZE; |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4524 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 4525 | if (chan->fcs == L2CAP_FCS_CRC16) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 4526 | len -= L2CAP_FCS_SIZE; |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4527 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 4528 | if (len > chan->mps) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 4529 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4530 | goto drop; |
| 4531 | } |
| 4532 | |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 4533 | req_seq = __get_reqseq(chan, control); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4534 | |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 4535 | req_seq_offset = __seq_offset(chan, req_seq, chan->expected_ack_seq); |
| 4536 | |
| 4537 | next_tx_seq_offset = __seq_offset(chan, chan->next_tx_seq, |
| 4538 | chan->expected_ack_seq); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4539 | |
| 4540 | /* check for invalid req-seq */ |
| 4541 | if (req_seq_offset > next_tx_seq_offset) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 4542 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4543 | goto drop; |
| 4544 | } |
| 4545 | |
Andrei Emeltchenko | 793c2f1 | 2011-10-11 13:37:48 +0300 | [diff] [blame] | 4546 | if (!__is_sframe(chan, control)) { |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4547 | if (len < 0) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 4548 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4549 | goto drop; |
| 4550 | } |
| 4551 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4552 | l2cap_data_channel_iframe(chan, control, skb); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4553 | } else { |
| 4554 | if (len != 0) { |
| 4555 | BT_ERR("%d", len); |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 4556 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4557 | goto drop; |
| 4558 | } |
| 4559 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4560 | l2cap_data_channel_sframe(chan, control, skb); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4561 | } |
| 4562 | |
| 4563 | return 0; |
| 4564 | |
| 4565 | drop: |
| 4566 | kfree_skb(skb); |
| 4567 | return 0; |
| 4568 | } |
| 4569 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4570 | static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) |
| 4571 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4572 | struct l2cap_chan *chan; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4573 | u32 control; |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 4574 | u16 tx_seq; |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4575 | int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4576 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 4577 | chan = l2cap_get_chan_by_scid(conn, cid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4578 | if (!chan) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4579 | BT_DBG("unknown cid 0x%4.4x", cid); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 4580 | /* Drop packet and return */ |
Dan Carpenter | 3379013 | 2012-02-28 09:52:46 +0300 | [diff] [blame] | 4581 | kfree_skb(skb); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 4582 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4583 | } |
| 4584 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 4585 | l2cap_chan_lock(chan); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 4586 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 4587 | BT_DBG("chan %p, len %d", chan, skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4588 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4589 | if (chan->state != BT_CONNECTED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4590 | goto drop; |
| 4591 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 4592 | switch (chan->mode) { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4593 | case L2CAP_MODE_BASIC: |
| 4594 | /* If socket recv buffers overflows we drop data here |
| 4595 | * which is *bad* because L2CAP has to be reliable. |
| 4596 | * But we don't have any other choice. L2CAP doesn't |
| 4597 | * provide flow control mechanism. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4598 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 4599 | if (chan->imtu < skb->len) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4600 | goto drop; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4601 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 4602 | if (!chan->ops->recv(chan->data, skb)) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4603 | goto done; |
| 4604 | break; |
| 4605 | |
| 4606 | case L2CAP_MODE_ERTM: |
Andrei Emeltchenko | 5ef8cb9 | 2012-01-13 17:21:42 +0200 | [diff] [blame] | 4607 | l2cap_ertm_data_rcv(chan, skb); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4608 | |
Andrei Emeltchenko | fcafde2 | 2009-12-22 15:58:08 +0200 | [diff] [blame] | 4609 | goto done; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4610 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 4611 | case L2CAP_MODE_STREAMING: |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 4612 | control = __get_control(chan, skb->data); |
| 4613 | skb_pull(skb, __ctrl_size(chan)); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 4614 | len = skb->len; |
| 4615 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 4616 | if (l2cap_check_fcs(chan, skb)) |
Gustavo F. Padovan | 2600008 | 2010-05-11 22:02:00 -0300 | [diff] [blame] | 4617 | goto drop; |
| 4618 | |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 4619 | if (__is_sar_start(chan, control)) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 4620 | len -= L2CAP_SDULEN_SIZE; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 4621 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 4622 | if (chan->fcs == L2CAP_FCS_CRC16) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 4623 | len -= L2CAP_FCS_SIZE; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 4624 | |
Andrei Emeltchenko | 793c2f1 | 2011-10-11 13:37:48 +0300 | [diff] [blame] | 4625 | if (len > chan->mps || len < 0 || __is_sframe(chan, control)) |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 4626 | goto drop; |
| 4627 | |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 4628 | tx_seq = __get_txseq(chan, control); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 4629 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4630 | if (chan->expected_tx_seq != tx_seq) { |
| 4631 | /* Frame(s) missing - must discard partial SDU */ |
| 4632 | kfree_skb(chan->sdu); |
| 4633 | chan->sdu = NULL; |
| 4634 | chan->sdu_last_frag = NULL; |
| 4635 | chan->sdu_len = 0; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 4636 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4637 | /* TODO: Notify userland of missing data */ |
| 4638 | } |
| 4639 | |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 4640 | chan->expected_tx_seq = __next_seq(chan, tx_seq); |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4641 | |
| 4642 | if (l2cap_reassemble_sdu(chan, skb, control) == -EMSGSIZE) |
| 4643 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 4644 | |
| 4645 | goto done; |
| 4646 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4647 | default: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 4648 | 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] | 4649 | break; |
| 4650 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4651 | |
| 4652 | drop: |
| 4653 | kfree_skb(skb); |
| 4654 | |
| 4655 | done: |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 4656 | l2cap_chan_unlock(chan); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4657 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4658 | return 0; |
| 4659 | } |
| 4660 | |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 4661 | 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] | 4662 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4663 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4664 | |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 4665 | 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] | 4666 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4667 | goto drop; |
| 4668 | |
Andrei Emeltchenko | 5b4ceda | 2012-02-24 16:35:32 +0200 | [diff] [blame] | 4669 | BT_DBG("chan %p, len %d", chan, skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4670 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4671 | if (chan->state != BT_BOUND && chan->state != BT_CONNECTED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4672 | goto drop; |
| 4673 | |
Vinicius Costa Gomes | e13e21d | 2011-06-17 22:46:27 -0300 | [diff] [blame] | 4674 | if (chan->imtu < skb->len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4675 | goto drop; |
| 4676 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 4677 | if (!chan->ops->recv(chan->data, skb)) |
Andrei Emeltchenko | 5b4ceda | 2012-02-24 16:35:32 +0200 | [diff] [blame] | 4678 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4679 | |
| 4680 | drop: |
| 4681 | kfree_skb(skb); |
| 4682 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4683 | return 0; |
| 4684 | } |
| 4685 | |
Andrei Emeltchenko | d9b8870 | 2012-03-12 12:13:08 +0200 | [diff] [blame] | 4686 | static inline int l2cap_att_channel(struct l2cap_conn *conn, u16 cid, |
| 4687 | struct sk_buff *skb) |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4688 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4689 | struct l2cap_chan *chan; |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4690 | |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 4691 | 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] | 4692 | if (!chan) |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4693 | goto drop; |
| 4694 | |
Andrei Emeltchenko | 5b4ceda | 2012-02-24 16:35:32 +0200 | [diff] [blame] | 4695 | BT_DBG("chan %p, len %d", chan, skb->len); |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4696 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4697 | if (chan->state != BT_BOUND && chan->state != BT_CONNECTED) |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4698 | goto drop; |
| 4699 | |
Vinicius Costa Gomes | e13e21d | 2011-06-17 22:46:27 -0300 | [diff] [blame] | 4700 | if (chan->imtu < skb->len) |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4701 | goto drop; |
| 4702 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 4703 | if (!chan->ops->recv(chan->data, skb)) |
Andrei Emeltchenko | 5b4ceda | 2012-02-24 16:35:32 +0200 | [diff] [blame] | 4704 | return 0; |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4705 | |
| 4706 | drop: |
| 4707 | kfree_skb(skb); |
| 4708 | |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4709 | return 0; |
| 4710 | } |
| 4711 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4712 | static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) |
| 4713 | { |
| 4714 | struct l2cap_hdr *lh = (void *) skb->data; |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 4715 | u16 cid, len; |
| 4716 | __le16 psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4717 | |
| 4718 | skb_pull(skb, L2CAP_HDR_SIZE); |
| 4719 | cid = __le16_to_cpu(lh->cid); |
| 4720 | len = __le16_to_cpu(lh->len); |
| 4721 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4722 | if (len != skb->len) { |
| 4723 | kfree_skb(skb); |
| 4724 | return; |
| 4725 | } |
| 4726 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4727 | BT_DBG("len %d, cid 0x%4.4x", len, cid); |
| 4728 | |
| 4729 | switch (cid) { |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 4730 | case L2CAP_CID_LE_SIGNALING: |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 4731 | case L2CAP_CID_SIGNALING: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4732 | l2cap_sig_channel(conn, skb); |
| 4733 | break; |
| 4734 | |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 4735 | case L2CAP_CID_CONN_LESS: |
Andrei Emeltchenko | 097db76 | 2012-03-09 14:16:17 +0200 | [diff] [blame] | 4736 | psm = get_unaligned((__le16 *) skb->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4737 | skb_pull(skb, 2); |
| 4738 | l2cap_conless_channel(conn, psm, skb); |
| 4739 | break; |
| 4740 | |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4741 | case L2CAP_CID_LE_DATA: |
| 4742 | l2cap_att_channel(conn, cid, skb); |
| 4743 | break; |
| 4744 | |
Anderson Briglia | b501d6a | 2011-06-07 18:46:31 -0300 | [diff] [blame] | 4745 | case L2CAP_CID_SMP: |
| 4746 | if (smp_sig_channel(conn, skb)) |
| 4747 | l2cap_conn_del(conn->hcon, EACCES); |
| 4748 | break; |
| 4749 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4750 | default: |
| 4751 | l2cap_data_channel(conn, cid, skb); |
| 4752 | break; |
| 4753 | } |
| 4754 | } |
| 4755 | |
| 4756 | /* ---- L2CAP interface with lower layer (HCI) ---- */ |
| 4757 | |
Ulisses Furquim | 686ebf2 | 2011-12-21 10:11:33 -0200 | [diff] [blame] | 4758 | int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4759 | { |
| 4760 | int exact = 0, lm1 = 0, lm2 = 0; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4761 | struct l2cap_chan *c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4762 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4763 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); |
| 4764 | |
| 4765 | /* Find listening sockets and check their link_mode */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4766 | read_lock(&chan_list_lock); |
| 4767 | list_for_each_entry(c, &chan_list, global_l) { |
| 4768 | struct sock *sk = c->sk; |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4769 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4770 | if (c->state != BT_LISTEN) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4771 | continue; |
| 4772 | |
| 4773 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 4774 | lm1 |= HCI_LM_ACCEPT; |
Andrei Emeltchenko | 43bd0f3 | 2011-10-11 14:04:34 +0300 | [diff] [blame] | 4775 | if (test_bit(FLAG_ROLE_SWITCH, &c->flags)) |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 4776 | lm1 |= HCI_LM_MASTER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4777 | exact++; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 4778 | } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { |
| 4779 | lm2 |= HCI_LM_ACCEPT; |
Andrei Emeltchenko | 43bd0f3 | 2011-10-11 14:04:34 +0300 | [diff] [blame] | 4780 | if (test_bit(FLAG_ROLE_SWITCH, &c->flags)) |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 4781 | lm2 |= HCI_LM_MASTER; |
| 4782 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4783 | } |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4784 | read_unlock(&chan_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4785 | |
| 4786 | return exact ? lm1 : lm2; |
| 4787 | } |
| 4788 | |
Ulisses Furquim | 686ebf2 | 2011-12-21 10:11:33 -0200 | [diff] [blame] | 4789 | int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4790 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4791 | struct l2cap_conn *conn; |
| 4792 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4793 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); |
| 4794 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4795 | if (!status) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4796 | conn = l2cap_conn_add(hcon, status); |
| 4797 | if (conn) |
| 4798 | l2cap_conn_ready(conn); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4799 | } else |
Joe Perches | e175072 | 2011-06-29 18:18:29 -0700 | [diff] [blame] | 4800 | l2cap_conn_del(hcon, bt_to_errno(status)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4801 | |
| 4802 | return 0; |
| 4803 | } |
| 4804 | |
Ulisses Furquim | 686ebf2 | 2011-12-21 10:11:33 -0200 | [diff] [blame] | 4805 | int l2cap_disconn_ind(struct hci_conn *hcon) |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 4806 | { |
| 4807 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 4808 | |
| 4809 | BT_DBG("hcon %p", hcon); |
| 4810 | |
Ulisses Furquim | 686ebf2 | 2011-12-21 10:11:33 -0200 | [diff] [blame] | 4811 | if (!conn) |
Andrei Emeltchenko | 9f5a0d7 | 2011-11-07 14:20:25 +0200 | [diff] [blame] | 4812 | return HCI_ERROR_REMOTE_USER_TERM; |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 4813 | return conn->disc_reason; |
| 4814 | } |
| 4815 | |
Ulisses Furquim | 686ebf2 | 2011-12-21 10:11:33 -0200 | [diff] [blame] | 4816 | int l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4817 | { |
| 4818 | BT_DBG("hcon %p reason %d", hcon, reason); |
| 4819 | |
Joe Perches | e175072 | 2011-06-29 18:18:29 -0700 | [diff] [blame] | 4820 | l2cap_conn_del(hcon, bt_to_errno(reason)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4821 | return 0; |
| 4822 | } |
| 4823 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4824 | static inline void l2cap_check_encryption(struct l2cap_chan *chan, u8 encrypt) |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4825 | { |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 4826 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) |
Marcel Holtmann | 255c760 | 2009-02-04 21:07:19 +0100 | [diff] [blame] | 4827 | return; |
| 4828 | |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4829 | if (encrypt == 0x00) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4830 | if (chan->sec_level == BT_SECURITY_MEDIUM) { |
Marcel Holtmann | ba13ccd | 2012-03-01 14:25:33 -0800 | [diff] [blame] | 4831 | __set_chan_timer(chan, L2CAP_ENC_TIMEOUT); |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4832 | } else if (chan->sec_level == BT_SECURITY_HIGH) |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 4833 | l2cap_chan_close(chan, ECONNREFUSED); |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4834 | } else { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4835 | if (chan->sec_level == BT_SECURITY_MEDIUM) |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 4836 | __clear_chan_timer(chan); |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4837 | } |
| 4838 | } |
| 4839 | |
Ulisses Furquim | 686ebf2 | 2011-12-21 10:11:33 -0200 | [diff] [blame] | 4840 | int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4841 | { |
Marcel Holtmann | 40be492 | 2008-07-14 20:13:50 +0200 | [diff] [blame] | 4842 | struct l2cap_conn *conn = hcon->l2cap_data; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4843 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4844 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4845 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4846 | return 0; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4847 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4848 | BT_DBG("conn %p", conn); |
| 4849 | |
Vinicius Costa Gomes | 160dc6a | 2011-08-19 21:06:55 -0300 | [diff] [blame] | 4850 | if (hcon->type == LE_LINK) { |
Hemant Gupta | 35d4adcc | 2012-04-18 14:46:26 +0530 | [diff] [blame] | 4851 | if (!status && encrypt) |
| 4852 | smp_distribute_keys(conn, 0); |
Ulisses Furquim | 17cd3f3 | 2012-01-30 18:26:28 -0200 | [diff] [blame] | 4853 | cancel_delayed_work(&conn->security_timer); |
Vinicius Costa Gomes | 160dc6a | 2011-08-19 21:06:55 -0300 | [diff] [blame] | 4854 | } |
| 4855 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 4856 | mutex_lock(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4857 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 4858 | list_for_each_entry(chan, &conn->chan_l, list) { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 4859 | l2cap_chan_lock(chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4860 | |
Vinicius Costa Gomes | f1cb9af | 2011-01-26 21:42:57 -0300 | [diff] [blame] | 4861 | BT_DBG("chan->scid %d", chan->scid); |
| 4862 | |
| 4863 | if (chan->scid == L2CAP_CID_LE_DATA) { |
| 4864 | if (!status && encrypt) { |
| 4865 | chan->sec_level = hcon->sec_level; |
Andrei Emeltchenko | cf4cd00 | 2012-02-06 15:03:59 +0200 | [diff] [blame] | 4866 | l2cap_chan_ready(chan); |
Vinicius Costa Gomes | f1cb9af | 2011-01-26 21:42:57 -0300 | [diff] [blame] | 4867 | } |
| 4868 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 4869 | l2cap_chan_unlock(chan); |
Vinicius Costa Gomes | f1cb9af | 2011-01-26 21:42:57 -0300 | [diff] [blame] | 4870 | continue; |
| 4871 | } |
| 4872 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 4873 | if (test_bit(CONF_CONNECT_PEND, &chan->conf_state)) { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 4874 | l2cap_chan_unlock(chan); |
Marcel Holtmann | 6a8d301 | 2009-02-06 23:56:36 +0100 | [diff] [blame] | 4875 | continue; |
| 4876 | } |
| 4877 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4878 | if (!status && (chan->state == BT_CONNECTED || |
| 4879 | chan->state == BT_CONFIG)) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4880 | l2cap_check_encryption(chan, encrypt); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 4881 | l2cap_chan_unlock(chan); |
Marcel Holtmann | 9719f8a | 2008-07-14 20:13:45 +0200 | [diff] [blame] | 4882 | continue; |
| 4883 | } |
| 4884 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4885 | if (chan->state == BT_CONNECT) { |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4886 | if (!status) { |
Andrei Emeltchenko | 9b27f35 | 2012-02-24 16:00:00 +0200 | [diff] [blame] | 4887 | l2cap_send_conn_req(chan); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4888 | } else { |
Marcel Holtmann | ba13ccd | 2012-03-01 14:25:33 -0800 | [diff] [blame] | 4889 | __set_chan_timer(chan, L2CAP_DISC_TIMEOUT); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4890 | } |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4891 | } else if (chan->state == BT_CONNECT2) { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 4892 | struct sock *sk = chan->sk; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4893 | struct l2cap_conn_rsp rsp; |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4894 | __u16 res, stat; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4895 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 4896 | lock_sock(sk); |
| 4897 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4898 | if (!status) { |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4899 | if (bt_sk(sk)->defer_setup) { |
| 4900 | struct sock *parent = bt_sk(sk)->parent; |
| 4901 | res = L2CAP_CR_PEND; |
| 4902 | stat = L2CAP_CS_AUTHOR_PEND; |
Ilia Kolomisnky | 05e9a2f | 2011-07-15 18:30:21 +0000 | [diff] [blame] | 4903 | if (parent) |
| 4904 | parent->sk_data_ready(parent, 0); |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4905 | } else { |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 4906 | __l2cap_state_change(chan, BT_CONFIG); |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4907 | res = L2CAP_CR_SUCCESS; |
| 4908 | stat = L2CAP_CS_NO_INFO; |
| 4909 | } |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4910 | } else { |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 4911 | __l2cap_state_change(chan, BT_DISCONN); |
Marcel Holtmann | ba13ccd | 2012-03-01 14:25:33 -0800 | [diff] [blame] | 4912 | __set_chan_timer(chan, L2CAP_DISC_TIMEOUT); |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4913 | res = L2CAP_CR_SEC_BLOCK; |
| 4914 | stat = L2CAP_CS_NO_INFO; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4915 | } |
| 4916 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 4917 | release_sock(sk); |
| 4918 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 4919 | rsp.scid = cpu_to_le16(chan->dcid); |
| 4920 | rsp.dcid = cpu_to_le16(chan->scid); |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4921 | rsp.result = cpu_to_le16(res); |
| 4922 | rsp.status = cpu_to_le16(stat); |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 4923 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, |
| 4924 | sizeof(rsp), &rsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4925 | } |
| 4926 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 4927 | l2cap_chan_unlock(chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4928 | } |
| 4929 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 4930 | mutex_unlock(&conn->chan_lock); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4931 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4932 | return 0; |
| 4933 | } |
| 4934 | |
Ulisses Furquim | 686ebf2 | 2011-12-21 10:11:33 -0200 | [diff] [blame] | 4935 | 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] | 4936 | { |
| 4937 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 4938 | |
Andrei Emeltchenko | 5a08ecc | 2011-01-11 17:20:20 +0200 | [diff] [blame] | 4939 | if (!conn) |
| 4940 | conn = l2cap_conn_add(hcon, 0); |
| 4941 | |
| 4942 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4943 | goto drop; |
| 4944 | |
| 4945 | BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); |
| 4946 | |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 4947 | if (!(flags & ACL_CONT)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4948 | struct l2cap_hdr *hdr; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4949 | struct l2cap_chan *chan; |
Andrei Emeltchenko | 8979481 | 2010-09-15 14:28:44 +0300 | [diff] [blame] | 4950 | u16 cid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4951 | int len; |
| 4952 | |
| 4953 | if (conn->rx_len) { |
| 4954 | BT_ERR("Unexpected start frame (len %d)", skb->len); |
| 4955 | kfree_skb(conn->rx_skb); |
| 4956 | conn->rx_skb = NULL; |
| 4957 | conn->rx_len = 0; |
| 4958 | l2cap_conn_unreliable(conn, ECOMM); |
| 4959 | } |
| 4960 | |
Andrei Emeltchenko | aae7fe2 | 2010-09-15 14:28:43 +0300 | [diff] [blame] | 4961 | /* Start fragment always begin with Basic L2CAP header */ |
| 4962 | if (skb->len < L2CAP_HDR_SIZE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4963 | BT_ERR("Frame is too short (len %d)", skb->len); |
| 4964 | l2cap_conn_unreliable(conn, ECOMM); |
| 4965 | goto drop; |
| 4966 | } |
| 4967 | |
| 4968 | hdr = (struct l2cap_hdr *) skb->data; |
| 4969 | len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; |
Andrei Emeltchenko | 8979481 | 2010-09-15 14:28:44 +0300 | [diff] [blame] | 4970 | cid = __le16_to_cpu(hdr->cid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4971 | |
| 4972 | if (len == skb->len) { |
| 4973 | /* Complete frame received */ |
| 4974 | l2cap_recv_frame(conn, skb); |
| 4975 | return 0; |
| 4976 | } |
| 4977 | |
| 4978 | BT_DBG("Start: total len %d, frag len %d", len, skb->len); |
| 4979 | |
| 4980 | if (skb->len > len) { |
| 4981 | BT_ERR("Frame is too long (len %d, expected len %d)", |
| 4982 | skb->len, len); |
| 4983 | l2cap_conn_unreliable(conn, ECOMM); |
| 4984 | goto drop; |
| 4985 | } |
| 4986 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 4987 | chan = l2cap_get_chan_by_scid(conn, cid); |
Andrei Emeltchenko | 8979481 | 2010-09-15 14:28:44 +0300 | [diff] [blame] | 4988 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4989 | if (chan && chan->sk) { |
| 4990 | struct sock *sk = chan->sk; |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 4991 | lock_sock(sk); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4992 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 4993 | if (chan->imtu < len - L2CAP_HDR_SIZE) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4994 | BT_ERR("Frame exceeding recv MTU (len %d, " |
| 4995 | "MTU %d)", len, |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 4996 | chan->imtu); |
Gustavo F. Padovan | aa2ac88 | 2011-06-24 01:53:01 -0300 | [diff] [blame] | 4997 | release_sock(sk); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4998 | l2cap_conn_unreliable(conn, ECOMM); |
| 4999 | goto drop; |
| 5000 | } |
Gustavo F. Padovan | aa2ac88 | 2011-06-24 01:53:01 -0300 | [diff] [blame] | 5001 | release_sock(sk); |
Andrei Emeltchenko | 8979481 | 2010-09-15 14:28:44 +0300 | [diff] [blame] | 5002 | } |
| 5003 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5004 | /* Allocate skb for the complete frame (with header) */ |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 5005 | conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC); |
| 5006 | if (!conn->rx_skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5007 | goto drop; |
| 5008 | |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 5009 | 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] | 5010 | skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5011 | conn->rx_len = len - skb->len; |
| 5012 | } else { |
| 5013 | BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); |
| 5014 | |
| 5015 | if (!conn->rx_len) { |
| 5016 | BT_ERR("Unexpected continuation frame (len %d)", skb->len); |
| 5017 | l2cap_conn_unreliable(conn, ECOMM); |
| 5018 | goto drop; |
| 5019 | } |
| 5020 | |
| 5021 | if (skb->len > conn->rx_len) { |
| 5022 | BT_ERR("Fragment is too long (len %d, expected %d)", |
| 5023 | skb->len, conn->rx_len); |
| 5024 | kfree_skb(conn->rx_skb); |
| 5025 | conn->rx_skb = NULL; |
| 5026 | conn->rx_len = 0; |
| 5027 | l2cap_conn_unreliable(conn, ECOMM); |
| 5028 | goto drop; |
| 5029 | } |
| 5030 | |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 5031 | 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] | 5032 | skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5033 | conn->rx_len -= skb->len; |
| 5034 | |
| 5035 | if (!conn->rx_len) { |
| 5036 | /* Complete frame received */ |
| 5037 | l2cap_recv_frame(conn, conn->rx_skb); |
| 5038 | conn->rx_skb = NULL; |
| 5039 | } |
| 5040 | } |
| 5041 | |
| 5042 | drop: |
| 5043 | kfree_skb(skb); |
| 5044 | return 0; |
| 5045 | } |
| 5046 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 5047 | static int l2cap_debugfs_show(struct seq_file *f, void *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5048 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 5049 | struct l2cap_chan *c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5050 | |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 5051 | read_lock(&chan_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5052 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 5053 | list_for_each_entry(c, &chan_list, global_l) { |
| 5054 | struct sock *sk = c->sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5055 | |
Gustavo F. Padovan | 903d343 | 2011-02-10 14:16:06 -0200 | [diff] [blame] | 5056 | 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] | 5057 | batostr(&bt_sk(sk)->src), |
| 5058 | batostr(&bt_sk(sk)->dst), |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 5059 | c->state, __le16_to_cpu(c->psm), |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 5060 | c->scid, c->dcid, c->imtu, c->omtu, |
| 5061 | c->sec_level, c->mode); |
Andrei Emeltchenko | 61e1b4b | 2012-01-19 11:19:50 +0200 | [diff] [blame] | 5062 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5063 | |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 5064 | read_unlock(&chan_list_lock); |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 5065 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 5066 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5067 | } |
| 5068 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 5069 | static int l2cap_debugfs_open(struct inode *inode, struct file *file) |
| 5070 | { |
| 5071 | return single_open(file, l2cap_debugfs_show, inode->i_private); |
| 5072 | } |
| 5073 | |
| 5074 | static const struct file_operations l2cap_debugfs_fops = { |
| 5075 | .open = l2cap_debugfs_open, |
| 5076 | .read = seq_read, |
| 5077 | .llseek = seq_lseek, |
| 5078 | .release = single_release, |
| 5079 | }; |
| 5080 | |
| 5081 | static struct dentry *l2cap_debugfs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5082 | |
Gustavo F. Padovan | 6427451 | 2011-02-07 20:08:52 -0200 | [diff] [blame] | 5083 | int __init l2cap_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5084 | { |
| 5085 | int err; |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 5086 | |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 5087 | err = l2cap_init_sockets(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5088 | if (err < 0) |
| 5089 | return err; |
| 5090 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 5091 | if (bt_debugfs) { |
| 5092 | l2cap_debugfs = debugfs_create_file("l2cap", 0444, |
| 5093 | bt_debugfs, NULL, &l2cap_debugfs_fops); |
| 5094 | if (!l2cap_debugfs) |
| 5095 | BT_ERR("Failed to create L2CAP debug file"); |
| 5096 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5097 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5098 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5099 | } |
| 5100 | |
Gustavo F. Padovan | 6427451 | 2011-02-07 20:08:52 -0200 | [diff] [blame] | 5101 | void l2cap_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5102 | { |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 5103 | debugfs_remove(l2cap_debugfs); |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 5104 | l2cap_cleanup_sockets(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5105 | } |
| 5106 | |
Gustavo F. Padovan | d1c4a17 | 2010-07-18 16:25:54 -0300 | [diff] [blame] | 5107 | module_param(disable_ertm, bool, 0644); |
| 5108 | MODULE_PARM_DESC(disable_ertm, "Disable enhanced retransmission mode"); |