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. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | |
| 7 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License version 2 as |
| 11 | published by the Free Software Foundation; |
| 12 | |
| 13 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| 14 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 15 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. |
| 16 | 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] | 17 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
| 18 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 19 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 21 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 22 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
| 23 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | SOFTWARE IS DISCLAIMED. |
| 25 | */ |
| 26 | |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 27 | /* Bluetooth L2CAP core. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/module.h> |
| 30 | |
| 31 | #include <linux/types.h> |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 32 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/errno.h> |
| 34 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <linux/sched.h> |
| 36 | #include <linux/slab.h> |
| 37 | #include <linux/poll.h> |
| 38 | #include <linux/fcntl.h> |
| 39 | #include <linux/init.h> |
| 40 | #include <linux/interrupt.h> |
| 41 | #include <linux/socket.h> |
| 42 | #include <linux/skbuff.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include <linux/list.h> |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 44 | #include <linux/device.h> |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 45 | #include <linux/debugfs.h> |
| 46 | #include <linux/seq_file.h> |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 47 | #include <linux/uaccess.h> |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 48 | #include <linux/crc16.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | #include <net/sock.h> |
| 50 | |
| 51 | #include <asm/system.h> |
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 | |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 59 | int disable_ertm; |
Andrei Emeltchenko | a5fd6f3 | 2011-09-16 16:26:32 +0300 | [diff] [blame] | 60 | int enable_hs; |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 61 | |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 62 | static u32 l2cap_feat_mask = L2CAP_FEAT_FIXED_CHAN; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 63 | static u8 l2cap_fixed_chan[8] = { 0x02, }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | |
Johannes Berg | b5ad8b7 | 2011-06-01 08:54:45 +0200 | [diff] [blame] | 65 | static LIST_HEAD(chan_list); |
| 66 | static DEFINE_RWLOCK(chan_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, |
| 69 | u8 code, u8 ident, u16 dlen, void *data); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 70 | static void l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, |
| 71 | void *data); |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 72 | static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 73 | static void l2cap_send_disconn_req(struct l2cap_conn *conn, |
| 74 | struct l2cap_chan *chan, int err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 76 | static int l2cap_ertm_data_rcv(struct sock *sk, struct sk_buff *skb); |
| 77 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 78 | /* ---- L2CAP channels ---- */ |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 79 | |
| 80 | static inline void chan_hold(struct l2cap_chan *c) |
| 81 | { |
| 82 | atomic_inc(&c->refcnt); |
| 83 | } |
| 84 | |
| 85 | static inline void chan_put(struct l2cap_chan *c) |
| 86 | { |
| 87 | if (atomic_dec_and_test(&c->refcnt)) |
| 88 | kfree(c); |
| 89 | } |
| 90 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 91 | 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] | 92 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 93 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 94 | |
| 95 | list_for_each_entry(c, &conn->chan_l, list) { |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 96 | if (c->dcid == cid) |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 97 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 98 | } |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 99 | return NULL; |
| 100 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 101 | } |
| 102 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 103 | 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] | 104 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 105 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 106 | |
| 107 | list_for_each_entry(c, &conn->chan_l, list) { |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 108 | if (c->scid == cid) |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 109 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 110 | } |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 111 | return NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 112 | } |
| 113 | |
| 114 | /* Find channel with given SCID. |
| 115 | * Returns locked socket */ |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 116 | 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] | 117 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 118 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 119 | |
| 120 | read_lock(&conn->chan_lock); |
| 121 | c = __l2cap_get_chan_by_scid(conn, cid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 122 | if (c) |
| 123 | bh_lock_sock(c->sk); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 124 | read_unlock(&conn->chan_lock); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 125 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 126 | } |
| 127 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 128 | 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] | 129 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 130 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 131 | |
| 132 | list_for_each_entry(c, &conn->chan_l, list) { |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 133 | if (c->ident == ident) |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 134 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 135 | } |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 136 | return NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 137 | } |
| 138 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 139 | static inline 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] | 140 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 141 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 142 | |
| 143 | read_lock(&conn->chan_lock); |
| 144 | c = __l2cap_get_chan_by_ident(conn, ident); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 145 | if (c) |
| 146 | bh_lock_sock(c->sk); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 147 | read_unlock(&conn->chan_lock); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 148 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 149 | } |
| 150 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 151 | 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] | 152 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 153 | struct l2cap_chan *c; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 154 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 155 | list_for_each_entry(c, &chan_list, global_l) { |
| 156 | if (c->sport == psm && !bacmp(&bt_sk(c->sk)->src, src)) |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 157 | goto found; |
| 158 | } |
| 159 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 160 | c = NULL; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 161 | found: |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 162 | return c; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 163 | } |
| 164 | |
| 165 | int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm) |
| 166 | { |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 167 | int err; |
| 168 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 169 | write_lock_bh(&chan_list_lock); |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 170 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 171 | if (psm && __l2cap_global_chan_by_addr(psm, src)) { |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 172 | err = -EADDRINUSE; |
| 173 | goto done; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 174 | } |
| 175 | |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 176 | if (psm) { |
| 177 | chan->psm = psm; |
| 178 | chan->sport = psm; |
| 179 | err = 0; |
| 180 | } else { |
| 181 | u16 p; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 182 | |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 183 | err = -EINVAL; |
| 184 | for (p = 0x1001; p < 0x1100; p += 2) |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 185 | if (!__l2cap_global_chan_by_addr(cpu_to_le16(p), src)) { |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 186 | chan->psm = cpu_to_le16(p); |
| 187 | chan->sport = cpu_to_le16(p); |
| 188 | err = 0; |
| 189 | break; |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | done: |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 194 | write_unlock_bh(&chan_list_lock); |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 195 | return err; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 196 | } |
| 197 | |
| 198 | int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid) |
| 199 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 200 | write_lock_bh(&chan_list_lock); |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 201 | |
| 202 | chan->scid = scid; |
| 203 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 204 | write_unlock_bh(&chan_list_lock); |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 205 | |
| 206 | return 0; |
| 207 | } |
| 208 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 209 | static u16 l2cap_alloc_cid(struct l2cap_conn *conn) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 210 | { |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 211 | u16 cid = L2CAP_CID_DYN_START; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 212 | |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 213 | for (; cid < L2CAP_CID_DYN_END; cid++) { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 214 | if (!__l2cap_get_chan_by_scid(conn, cid)) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 215 | return cid; |
| 216 | } |
| 217 | |
| 218 | return 0; |
| 219 | } |
| 220 | |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 221 | static void l2cap_set_timer(struct l2cap_chan *chan, struct timer_list *timer, long timeout) |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 222 | { |
Andrei Emeltchenko | 457f485 | 2011-10-31 16:17:21 +0200 | [diff] [blame^] | 223 | BT_DBG("chan %p state %d timeout %ld", chan, chan->state, timeout); |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 224 | |
Mat Martineau | 942ecc9 | 2011-06-29 14:35:21 -0700 | [diff] [blame] | 225 | if (!mod_timer(timer, jiffies + msecs_to_jiffies(timeout))) |
Mat Martineau | 774e565 | 2011-06-29 14:35:20 -0700 | [diff] [blame] | 226 | chan_hold(chan); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 227 | } |
| 228 | |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 229 | static void l2cap_clear_timer(struct l2cap_chan *chan, struct timer_list *timer) |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 230 | { |
Mat Martineau | 774e565 | 2011-06-29 14:35:20 -0700 | [diff] [blame] | 231 | BT_DBG("chan %p state %d", chan, chan->state); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 232 | |
Mat Martineau | 774e565 | 2011-06-29 14:35:20 -0700 | [diff] [blame] | 233 | if (timer_pending(timer) && del_timer(timer)) |
| 234 | chan_put(chan); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 235 | } |
| 236 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 237 | static void l2cap_state_change(struct l2cap_chan *chan, int state) |
| 238 | { |
| 239 | chan->state = state; |
| 240 | chan->ops->state_change(chan->data, state); |
| 241 | } |
| 242 | |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 243 | static void l2cap_chan_timeout(unsigned long arg) |
| 244 | { |
| 245 | struct l2cap_chan *chan = (struct l2cap_chan *) arg; |
| 246 | struct sock *sk = chan->sk; |
| 247 | int reason; |
| 248 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 249 | BT_DBG("chan %p state %d", chan, chan->state); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 250 | |
| 251 | bh_lock_sock(sk); |
| 252 | |
| 253 | if (sock_owned_by_user(sk)) { |
| 254 | /* sk is owned by user. Try again later */ |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 255 | __set_chan_timer(chan, HZ / 5); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 256 | bh_unlock_sock(sk); |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 257 | chan_put(chan); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 258 | return; |
| 259 | } |
| 260 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 261 | if (chan->state == BT_CONNECTED || chan->state == BT_CONFIG) |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 262 | reason = ECONNREFUSED; |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 263 | else if (chan->state == BT_CONNECT && |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 264 | chan->sec_level != BT_SECURITY_SDP) |
| 265 | reason = ECONNREFUSED; |
| 266 | else |
| 267 | reason = ETIMEDOUT; |
| 268 | |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 269 | l2cap_chan_close(chan, reason); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 270 | |
| 271 | bh_unlock_sock(sk); |
| 272 | |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 273 | chan->ops->close(chan->data); |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 274 | chan_put(chan); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 275 | } |
| 276 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 277 | struct l2cap_chan *l2cap_chan_create(struct sock *sk) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 278 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 279 | struct l2cap_chan *chan; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 280 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 281 | chan = kzalloc(sizeof(*chan), GFP_ATOMIC); |
| 282 | if (!chan) |
| 283 | return NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 284 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 285 | chan->sk = sk; |
| 286 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 287 | write_lock_bh(&chan_list_lock); |
| 288 | list_add(&chan->global_l, &chan_list); |
| 289 | write_unlock_bh(&chan_list_lock); |
| 290 | |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 291 | setup_timer(&chan->chan_timer, l2cap_chan_timeout, (unsigned long) chan); |
| 292 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 293 | chan->state = BT_OPEN; |
| 294 | |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 295 | atomic_set(&chan->refcnt, 1); |
| 296 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 297 | return chan; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 298 | } |
| 299 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 300 | void l2cap_chan_destroy(struct l2cap_chan *chan) |
Gustavo F. Padovan | 6ff5abb | 2011-04-25 15:10:41 -0300 | [diff] [blame] | 301 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 302 | write_lock_bh(&chan_list_lock); |
| 303 | list_del(&chan->global_l); |
| 304 | write_unlock_bh(&chan_list_lock); |
| 305 | |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 306 | chan_put(chan); |
Gustavo F. Padovan | 6ff5abb | 2011-04-25 15:10:41 -0300 | [diff] [blame] | 307 | } |
| 308 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 309 | 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] | 310 | { |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 311 | BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 312 | chan->psm, chan->dcid); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 313 | |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 314 | conn->disc_reason = 0x13; |
| 315 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 316 | chan->conn = conn; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 317 | |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 318 | if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED) { |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 319 | if (conn->hcon->type == LE_LINK) { |
| 320 | /* LE connection */ |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 321 | chan->omtu = L2CAP_LE_DEFAULT_MTU; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 322 | chan->scid = L2CAP_CID_LE_DATA; |
| 323 | chan->dcid = L2CAP_CID_LE_DATA; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 324 | } else { |
| 325 | /* Alloc CID for connection-oriented socket */ |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 326 | chan->scid = l2cap_alloc_cid(conn); |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 327 | chan->omtu = L2CAP_DEFAULT_MTU; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 328 | } |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 329 | } else if (chan->chan_type == L2CAP_CHAN_CONN_LESS) { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 330 | /* Connectionless socket */ |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 331 | chan->scid = L2CAP_CID_CONN_LESS; |
| 332 | chan->dcid = L2CAP_CID_CONN_LESS; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 333 | chan->omtu = L2CAP_DEFAULT_MTU; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 334 | } else { |
| 335 | /* Raw socket can send/recv signalling messages only */ |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 336 | chan->scid = L2CAP_CID_SIGNALING; |
| 337 | chan->dcid = L2CAP_CID_SIGNALING; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 338 | chan->omtu = L2CAP_DEFAULT_MTU; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 339 | } |
| 340 | |
Andrei Emeltchenko | 8f7975b | 2011-10-13 16:18:54 +0300 | [diff] [blame] | 341 | chan->local_id = L2CAP_BESTEFFORT_ID; |
| 342 | chan->local_stype = L2CAP_SERV_BESTEFFORT; |
| 343 | chan->local_msdu = L2CAP_DEFAULT_MAX_SDU_SIZE; |
| 344 | chan->local_sdu_itime = L2CAP_DEFAULT_SDU_ITIME; |
| 345 | chan->local_acc_lat = L2CAP_DEFAULT_ACC_LAT; |
| 346 | chan->local_flush_to = L2CAP_DEFAULT_FLUSH_TO; |
| 347 | |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 348 | chan_hold(chan); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 349 | |
| 350 | list_add(&chan->list, &conn->chan_l); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 351 | } |
| 352 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 353 | /* Delete channel. |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 354 | * Must be called on the locked socket. */ |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 355 | static void l2cap_chan_del(struct l2cap_chan *chan, int err) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 356 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 357 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 358 | struct l2cap_conn *conn = chan->conn; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 359 | struct sock *parent = bt_sk(sk)->parent; |
| 360 | |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 361 | __clear_chan_timer(chan); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 362 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 363 | BT_DBG("chan %p, conn %p, err %d", chan, conn, err); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 364 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 365 | if (conn) { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 366 | /* Delete from channel list */ |
| 367 | write_lock_bh(&conn->chan_lock); |
| 368 | list_del(&chan->list); |
| 369 | write_unlock_bh(&conn->chan_lock); |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 370 | chan_put(chan); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 371 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 372 | chan->conn = NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 373 | hci_conn_put(conn->hcon); |
| 374 | } |
| 375 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 376 | l2cap_state_change(chan, BT_CLOSED); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 377 | sock_set_flag(sk, SOCK_ZAPPED); |
| 378 | |
| 379 | if (err) |
| 380 | sk->sk_err = err; |
| 381 | |
| 382 | if (parent) { |
| 383 | bt_accept_unlink(sk); |
| 384 | parent->sk_data_ready(parent, 0); |
| 385 | } else |
| 386 | sk->sk_state_change(sk); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 387 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 388 | if (!(test_bit(CONF_OUTPUT_DONE, &chan->conf_state) && |
| 389 | test_bit(CONF_INPUT_DONE, &chan->conf_state))) |
Gustavo F. Padovan | 6ff5abb | 2011-04-25 15:10:41 -0300 | [diff] [blame] | 390 | return; |
Gustavo F. Padovan | 2ead70b | 2011-04-01 15:13:36 -0300 | [diff] [blame] | 391 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 392 | skb_queue_purge(&chan->tx_q); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 393 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 394 | if (chan->mode == L2CAP_MODE_ERTM) { |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 395 | struct srej_list *l, *tmp; |
| 396 | |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 397 | __clear_retrans_timer(chan); |
| 398 | __clear_monitor_timer(chan); |
| 399 | __clear_ack_timer(chan); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 400 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 401 | skb_queue_purge(&chan->srej_q); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 402 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 403 | list_for_each_entry_safe(l, tmp, &chan->srej_l, list) { |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 404 | list_del(&l->list); |
| 405 | kfree(l); |
| 406 | } |
| 407 | } |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 408 | } |
| 409 | |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 410 | static void l2cap_chan_cleanup_listen(struct sock *parent) |
| 411 | { |
| 412 | struct sock *sk; |
| 413 | |
| 414 | BT_DBG("parent %p", parent); |
| 415 | |
| 416 | /* Close not yet accepted channels */ |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 417 | while ((sk = bt_accept_dequeue(parent, NULL))) { |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 418 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 419 | __clear_chan_timer(chan); |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 420 | lock_sock(sk); |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 421 | l2cap_chan_close(chan, ECONNRESET); |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 422 | release_sock(sk); |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 423 | chan->ops->close(chan->data); |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 424 | } |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 425 | } |
| 426 | |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 427 | void l2cap_chan_close(struct l2cap_chan *chan, int reason) |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 428 | { |
| 429 | struct l2cap_conn *conn = chan->conn; |
| 430 | struct sock *sk = chan->sk; |
| 431 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 432 | BT_DBG("chan %p state %d socket %p", chan, chan->state, sk->sk_socket); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 433 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 434 | switch (chan->state) { |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 435 | case BT_LISTEN: |
| 436 | l2cap_chan_cleanup_listen(sk); |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 437 | |
| 438 | l2cap_state_change(chan, BT_CLOSED); |
| 439 | sock_set_flag(sk, SOCK_ZAPPED); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 440 | break; |
| 441 | |
| 442 | case BT_CONNECTED: |
| 443 | case BT_CONFIG: |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 444 | if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 445 | conn->hcon->type == ACL_LINK) { |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 446 | __clear_chan_timer(chan); |
| 447 | __set_chan_timer(chan, sk->sk_sndtimeo); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 448 | l2cap_send_disconn_req(conn, chan, reason); |
| 449 | } else |
| 450 | l2cap_chan_del(chan, reason); |
| 451 | break; |
| 452 | |
| 453 | case BT_CONNECT2: |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 454 | if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 455 | conn->hcon->type == ACL_LINK) { |
| 456 | struct l2cap_conn_rsp rsp; |
| 457 | __u16 result; |
| 458 | |
| 459 | if (bt_sk(sk)->defer_setup) |
| 460 | result = L2CAP_CR_SEC_BLOCK; |
| 461 | else |
| 462 | result = L2CAP_CR_BAD_PSM; |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 463 | l2cap_state_change(chan, BT_DISCONN); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 464 | |
| 465 | rsp.scid = cpu_to_le16(chan->dcid); |
| 466 | rsp.dcid = cpu_to_le16(chan->scid); |
| 467 | rsp.result = cpu_to_le16(result); |
| 468 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 469 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, |
| 470 | sizeof(rsp), &rsp); |
| 471 | } |
| 472 | |
| 473 | l2cap_chan_del(chan, reason); |
| 474 | break; |
| 475 | |
| 476 | case BT_CONNECT: |
| 477 | case BT_DISCONN: |
| 478 | l2cap_chan_del(chan, reason); |
| 479 | break; |
| 480 | |
| 481 | default: |
| 482 | sock_set_flag(sk, SOCK_ZAPPED); |
| 483 | break; |
| 484 | } |
| 485 | } |
| 486 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 487 | static inline u8 l2cap_get_auth_type(struct l2cap_chan *chan) |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 488 | { |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 489 | if (chan->chan_type == L2CAP_CHAN_RAW) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 490 | switch (chan->sec_level) { |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 491 | case BT_SECURITY_HIGH: |
| 492 | return HCI_AT_DEDICATED_BONDING_MITM; |
| 493 | case BT_SECURITY_MEDIUM: |
| 494 | return HCI_AT_DEDICATED_BONDING; |
| 495 | default: |
| 496 | return HCI_AT_NO_BONDING; |
| 497 | } |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 498 | } else if (chan->psm == cpu_to_le16(0x0001)) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 499 | if (chan->sec_level == BT_SECURITY_LOW) |
| 500 | chan->sec_level = BT_SECURITY_SDP; |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 501 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 502 | if (chan->sec_level == BT_SECURITY_HIGH) |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 503 | return HCI_AT_NO_BONDING_MITM; |
| 504 | else |
| 505 | return HCI_AT_NO_BONDING; |
| 506 | } else { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 507 | switch (chan->sec_level) { |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 508 | case BT_SECURITY_HIGH: |
| 509 | return HCI_AT_GENERAL_BONDING_MITM; |
| 510 | case BT_SECURITY_MEDIUM: |
| 511 | return HCI_AT_GENERAL_BONDING; |
| 512 | default: |
| 513 | return HCI_AT_NO_BONDING; |
| 514 | } |
| 515 | } |
| 516 | } |
| 517 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 518 | /* Service level security */ |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 519 | static inline int l2cap_check_security(struct l2cap_chan *chan) |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 520 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 521 | struct l2cap_conn *conn = chan->conn; |
Marcel Holtmann | 0684e5f | 2009-02-09 02:48:38 +0100 | [diff] [blame] | 522 | __u8 auth_type; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 523 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 524 | auth_type = l2cap_get_auth_type(chan); |
Marcel Holtmann | 0684e5f | 2009-02-09 02:48:38 +0100 | [diff] [blame] | 525 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 526 | return hci_conn_security(conn->hcon, chan->sec_level, auth_type); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 527 | } |
| 528 | |
Johannes Berg | b5ad8b7 | 2011-06-01 08:54:45 +0200 | [diff] [blame] | 529 | static u8 l2cap_get_ident(struct l2cap_conn *conn) |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 530 | { |
| 531 | u8 id; |
| 532 | |
| 533 | /* Get next available identificator. |
| 534 | * 1 - 128 are used by kernel. |
| 535 | * 129 - 199 are reserved. |
| 536 | * 200 - 254 are used by utilities like l2ping, etc. |
| 537 | */ |
| 538 | |
| 539 | spin_lock_bh(&conn->lock); |
| 540 | |
| 541 | if (++conn->tx_ident > 128) |
| 542 | conn->tx_ident = 1; |
| 543 | |
| 544 | id = conn->tx_ident; |
| 545 | |
| 546 | spin_unlock_bh(&conn->lock); |
| 547 | |
| 548 | return id; |
| 549 | } |
| 550 | |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 551 | 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] | 552 | { |
| 553 | struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 554 | u8 flags; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 555 | |
| 556 | BT_DBG("code 0x%2.2x", code); |
| 557 | |
| 558 | if (!skb) |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 559 | return; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 560 | |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 561 | if (lmp_no_flush_capable(conn->hcon->hdev)) |
| 562 | flags = ACL_START_NO_FLUSH; |
| 563 | else |
| 564 | flags = ACL_START; |
| 565 | |
Jaikumar Ganesh | 14b12d0 | 2011-05-23 18:06:04 -0700 | [diff] [blame] | 566 | bt_cb(skb)->force_active = BT_POWER_FORCE_ACTIVE_ON; |
| 567 | |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 568 | hci_send_acl(conn->hcon, skb, flags); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 569 | } |
| 570 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 571 | 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] | 572 | { |
| 573 | struct sk_buff *skb; |
| 574 | struct l2cap_hdr *lh; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 575 | struct l2cap_conn *conn = chan->conn; |
Andrei Emeltchenko | e4ca6d9 | 2011-10-11 13:37:52 +0300 | [diff] [blame] | 576 | int count, hlen; |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 577 | u8 flags; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 578 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 579 | if (chan->state != BT_CONNECTED) |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 580 | return; |
| 581 | |
Andrei Emeltchenko | e4ca6d9 | 2011-10-11 13:37:52 +0300 | [diff] [blame] | 582 | if (test_bit(FLAG_EXT_CTRL, &chan->flags)) |
| 583 | hlen = L2CAP_EXT_HDR_SIZE; |
| 584 | else |
| 585 | hlen = L2CAP_ENH_HDR_SIZE; |
| 586 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 587 | if (chan->fcs == L2CAP_FCS_CRC16) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 588 | hlen += L2CAP_FCS_SIZE; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 589 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 590 | BT_DBG("chan %p, control 0x%8.8x", chan, control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 591 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 592 | count = min_t(unsigned int, conn->mtu, hlen); |
Andrei Emeltchenko | 793c2f1 | 2011-10-11 13:37:48 +0300 | [diff] [blame] | 593 | |
| 594 | control |= __set_sframe(chan); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 595 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 596 | if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state)) |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 597 | control |= __set_ctrl_final(chan); |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 598 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 599 | if (test_and_clear_bit(CONN_SEND_PBIT, &chan->conn_state)) |
Andrei Emeltchenko | e378173 | 2011-10-11 13:37:50 +0300 | [diff] [blame] | 600 | control |= __set_ctrl_poll(chan); |
Gustavo F. Padovan | f0946cc | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 601 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 602 | skb = bt_skb_alloc(count, GFP_ATOMIC); |
| 603 | if (!skb) |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 604 | return; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 605 | |
| 606 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 607 | lh->len = cpu_to_le16(hlen - L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 608 | lh->cid = cpu_to_le16(chan->dcid); |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 609 | |
| 610 | __put_control(chan, control, skb_put(skb, __ctrl_size(chan))); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 611 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 612 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 613 | u16 fcs = crc16(0, (u8 *)lh, count - L2CAP_FCS_SIZE); |
| 614 | put_unaligned_le16(fcs, skb_put(skb, L2CAP_FCS_SIZE)); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 615 | } |
| 616 | |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 617 | if (lmp_no_flush_capable(conn->hcon->hdev)) |
| 618 | flags = ACL_START_NO_FLUSH; |
| 619 | else |
| 620 | flags = ACL_START; |
| 621 | |
Andrei Emeltchenko | 15770b1 | 2011-10-11 14:04:33 +0300 | [diff] [blame] | 622 | bt_cb(skb)->force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags); |
Jaikumar Ganesh | 14b12d0 | 2011-05-23 18:06:04 -0700 | [diff] [blame] | 623 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 624 | hci_send_acl(chan->conn->hcon, skb, flags); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 625 | } |
| 626 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 627 | 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] | 628 | { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 629 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 630 | control |= __set_ctrl_super(chan, L2CAP_SUPER_RNR); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 631 | set_bit(CONN_RNR_SENT, &chan->conn_state); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 632 | } else |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 633 | control |= __set_ctrl_super(chan, L2CAP_SUPER_RR); |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 634 | |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 635 | control |= __set_reqseq(chan, chan->buffer_seq); |
Gustavo F. Padovan | 2ab25cd | 2009-10-03 02:34:40 -0300 | [diff] [blame] | 636 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 637 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 638 | } |
| 639 | |
Gustavo F. Padovan | b445003 | 2011-04-12 18:15:09 -0300 | [diff] [blame] | 640 | static inline int __l2cap_no_conn_pending(struct l2cap_chan *chan) |
Andrei Emeltchenko | e501d05 | 2010-07-08 12:14:41 +0300 | [diff] [blame] | 641 | { |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 642 | return !test_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Andrei Emeltchenko | e501d05 | 2010-07-08 12:14:41 +0300 | [diff] [blame] | 643 | } |
| 644 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 645 | static void l2cap_do_start(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 | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 648 | |
| 649 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) { |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 650 | if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)) |
| 651 | return; |
| 652 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 653 | if (l2cap_check_security(chan) && |
| 654 | __l2cap_no_conn_pending(chan)) { |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 655 | struct l2cap_conn_req req; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 656 | req.scid = cpu_to_le16(chan->scid); |
| 657 | req.psm = chan->psm; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 658 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 659 | chan->ident = l2cap_get_ident(conn); |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 660 | set_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 661 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 662 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_REQ, |
| 663 | sizeof(req), &req); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 664 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 665 | } else { |
| 666 | struct l2cap_info_req req; |
| 667 | req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 668 | |
| 669 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; |
| 670 | conn->info_ident = l2cap_get_ident(conn); |
| 671 | |
| 672 | mod_timer(&conn->info_timer, jiffies + |
| 673 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); |
| 674 | |
| 675 | l2cap_send_cmd(conn, conn->info_ident, |
| 676 | L2CAP_INFO_REQ, sizeof(req), &req); |
| 677 | } |
| 678 | } |
| 679 | |
Gustavo F. Padovan | cf6c2c0 | 2010-06-07 20:54:45 -0300 | [diff] [blame] | 680 | static inline int l2cap_mode_supported(__u8 mode, __u32 feat_mask) |
| 681 | { |
| 682 | u32 local_feat_mask = l2cap_feat_mask; |
Gustavo F. Padovan | d1c4a17 | 2010-07-18 16:25:54 -0300 | [diff] [blame] | 683 | if (!disable_ertm) |
Gustavo F. Padovan | cf6c2c0 | 2010-06-07 20:54:45 -0300 | [diff] [blame] | 684 | local_feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING; |
| 685 | |
| 686 | switch (mode) { |
| 687 | case L2CAP_MODE_ERTM: |
| 688 | return L2CAP_FEAT_ERTM & feat_mask & local_feat_mask; |
| 689 | case L2CAP_MODE_STREAMING: |
| 690 | return L2CAP_FEAT_STREAMING & feat_mask & local_feat_mask; |
| 691 | default: |
| 692 | return 0x00; |
| 693 | } |
| 694 | } |
| 695 | |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 696 | 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] | 697 | { |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 698 | struct sock *sk; |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 699 | struct l2cap_disconn_req req; |
| 700 | |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 701 | if (!conn) |
| 702 | return; |
| 703 | |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 704 | sk = chan->sk; |
| 705 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 706 | if (chan->mode == L2CAP_MODE_ERTM) { |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 707 | __clear_retrans_timer(chan); |
| 708 | __clear_monitor_timer(chan); |
| 709 | __clear_ack_timer(chan); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 710 | } |
| 711 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 712 | req.dcid = cpu_to_le16(chan->dcid); |
| 713 | req.scid = cpu_to_le16(chan->scid); |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 714 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
| 715 | L2CAP_DISCONN_REQ, sizeof(req), &req); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 716 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 717 | l2cap_state_change(chan, BT_DISCONN); |
Gustavo F. Padovan | 9b108fc | 2010-05-20 16:21:53 -0300 | [diff] [blame] | 718 | sk->sk_err = err; |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 719 | } |
| 720 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | /* ---- L2CAP connections ---- */ |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 722 | static void l2cap_conn_start(struct l2cap_conn *conn) |
| 723 | { |
Gustavo F. Padovan | 820ffdb | 2011-04-01 00:35:21 -0300 | [diff] [blame] | 724 | struct l2cap_chan *chan, *tmp; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 725 | |
| 726 | BT_DBG("conn %p", conn); |
| 727 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 728 | read_lock(&conn->chan_lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 729 | |
Gustavo F. Padovan | 820ffdb | 2011-04-01 00:35:21 -0300 | [diff] [blame] | 730 | list_for_each_entry_safe(chan, tmp, &conn->chan_l, list) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 731 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 732 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 733 | bh_lock_sock(sk); |
| 734 | |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 735 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 736 | bh_unlock_sock(sk); |
| 737 | continue; |
| 738 | } |
| 739 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 740 | if (chan->state == BT_CONNECT) { |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 741 | struct l2cap_conn_req req; |
Gustavo F. Padovan | cf6c2c0 | 2010-06-07 20:54:45 -0300 | [diff] [blame] | 742 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 743 | if (!l2cap_check_security(chan) || |
Gustavo F. Padovan | b445003 | 2011-04-12 18:15:09 -0300 | [diff] [blame] | 744 | !__l2cap_no_conn_pending(chan)) { |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 745 | bh_unlock_sock(sk); |
| 746 | continue; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 747 | } |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 748 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 749 | if (!l2cap_mode_supported(chan->mode, conn->feat_mask) |
| 750 | && test_bit(CONF_STATE2_DEVICE, |
| 751 | &chan->conf_state)) { |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 752 | /* l2cap_chan_close() calls list_del(chan) |
Gustavo F. Padovan | 820ffdb | 2011-04-01 00:35:21 -0300 | [diff] [blame] | 753 | * so release the lock */ |
Gustavo F. Padovan | 2461daa | 2011-06-17 12:57:25 -0300 | [diff] [blame] | 754 | read_unlock(&conn->chan_lock); |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 755 | l2cap_chan_close(chan, ECONNRESET); |
Gustavo F. Padovan | 2461daa | 2011-06-17 12:57:25 -0300 | [diff] [blame] | 756 | read_lock(&conn->chan_lock); |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 757 | bh_unlock_sock(sk); |
| 758 | continue; |
| 759 | } |
| 760 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 761 | req.scid = cpu_to_le16(chan->scid); |
| 762 | req.psm = chan->psm; |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 763 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 764 | chan->ident = l2cap_get_ident(conn); |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 765 | set_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 766 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 767 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_REQ, |
| 768 | sizeof(req), &req); |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 769 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 770 | } else if (chan->state == BT_CONNECT2) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 771 | struct l2cap_conn_rsp rsp; |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 772 | char buf[128]; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 773 | rsp.scid = cpu_to_le16(chan->dcid); |
| 774 | rsp.dcid = cpu_to_le16(chan->scid); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 775 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 776 | if (l2cap_check_security(chan)) { |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 777 | if (bt_sk(sk)->defer_setup) { |
| 778 | struct sock *parent = bt_sk(sk)->parent; |
| 779 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); |
| 780 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHOR_PEND); |
Ilia Kolomisnky | 05e9a2f | 2011-07-15 18:30:21 +0000 | [diff] [blame] | 781 | if (parent) |
| 782 | parent->sk_data_ready(parent, 0); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 783 | |
| 784 | } else { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 785 | l2cap_state_change(chan, BT_CONFIG); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 786 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); |
| 787 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 788 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 789 | } else { |
| 790 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); |
| 791 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHEN_PEND); |
| 792 | } |
| 793 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 794 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, |
| 795 | sizeof(rsp), &rsp); |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 796 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 797 | if (test_bit(CONF_REQ_SENT, &chan->conf_state) || |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 798 | rsp.result != L2CAP_CR_SUCCESS) { |
| 799 | bh_unlock_sock(sk); |
| 800 | continue; |
| 801 | } |
| 802 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 803 | set_bit(CONF_REQ_SENT, &chan->conf_state); |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 804 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 805 | l2cap_build_conf_req(chan, buf), buf); |
| 806 | chan->num_conf_req++; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 807 | } |
| 808 | |
| 809 | bh_unlock_sock(sk); |
| 810 | } |
| 811 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 812 | read_unlock(&conn->chan_lock); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 813 | } |
| 814 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 815 | /* Find socket with cid and source bdaddr. |
| 816 | * Returns closest match, locked. |
| 817 | */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 818 | static struct l2cap_chan *l2cap_global_chan_by_scid(int state, __le16 cid, bdaddr_t *src) |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 819 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 820 | struct l2cap_chan *c, *c1 = NULL; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 821 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 822 | read_lock(&chan_list_lock); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 823 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 824 | list_for_each_entry(c, &chan_list, global_l) { |
| 825 | struct sock *sk = c->sk; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 826 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 827 | if (state && c->state != state) |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 828 | continue; |
| 829 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 830 | if (c->scid == cid) { |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 831 | /* Exact match. */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 832 | if (!bacmp(&bt_sk(sk)->src, src)) { |
| 833 | read_unlock(&chan_list_lock); |
| 834 | return c; |
| 835 | } |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 836 | |
| 837 | /* Closest match */ |
| 838 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 839 | c1 = c; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 840 | } |
| 841 | } |
Gustavo F. Padovan | 280f294 | 2011-04-13 19:01:22 -0300 | [diff] [blame] | 842 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 843 | read_unlock(&chan_list_lock); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 844 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 845 | return c1; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 846 | } |
| 847 | |
| 848 | static void l2cap_le_conn_ready(struct l2cap_conn *conn) |
| 849 | { |
Gustavo F. Padovan | c916fbe | 2011-04-04 16:00:55 -0300 | [diff] [blame] | 850 | struct sock *parent, *sk; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 851 | struct l2cap_chan *chan, *pchan; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 852 | |
| 853 | BT_DBG(""); |
| 854 | |
| 855 | /* Check if we have socket listening on cid */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 856 | pchan = l2cap_global_chan_by_scid(BT_LISTEN, L2CAP_CID_LE_DATA, |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 857 | conn->src); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 858 | if (!pchan) |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 859 | return; |
| 860 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 861 | parent = pchan->sk; |
| 862 | |
Gustavo F. Padovan | 62f3a2c | 2011-04-14 18:34:34 -0300 | [diff] [blame] | 863 | bh_lock_sock(parent); |
| 864 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 865 | /* Check for backlog size */ |
| 866 | if (sk_acceptq_is_full(parent)) { |
| 867 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
| 868 | goto clean; |
| 869 | } |
| 870 | |
Gustavo F. Padovan | 80808e4 | 2011-05-16 17:24:37 -0300 | [diff] [blame] | 871 | chan = pchan->ops->new_connection(pchan->data); |
| 872 | if (!chan) |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 873 | goto clean; |
| 874 | |
Gustavo F. Padovan | 80808e4 | 2011-05-16 17:24:37 -0300 | [diff] [blame] | 875 | sk = chan->sk; |
Gustavo F. Padovan | 5d41ce1 | 2011-04-08 15:40:02 -0300 | [diff] [blame] | 876 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 877 | write_lock_bh(&conn->chan_lock); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 878 | |
| 879 | hci_conn_hold(conn->hcon); |
| 880 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 881 | bacpy(&bt_sk(sk)->src, conn->src); |
| 882 | bacpy(&bt_sk(sk)->dst, conn->dst); |
| 883 | |
Gustavo F. Padovan | d101024 | 2011-03-25 00:39:48 -0300 | [diff] [blame] | 884 | bt_accept_enqueue(parent, sk); |
| 885 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 886 | __l2cap_chan_add(conn, chan); |
| 887 | |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 888 | __set_chan_timer(chan, sk->sk_sndtimeo); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 889 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 890 | l2cap_state_change(chan, BT_CONNECTED); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 891 | parent->sk_data_ready(parent, 0); |
| 892 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 893 | write_unlock_bh(&conn->chan_lock); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 894 | |
| 895 | clean: |
| 896 | bh_unlock_sock(parent); |
| 897 | } |
| 898 | |
Vinicius Costa Gomes | f1cb9af | 2011-01-26 21:42:57 -0300 | [diff] [blame] | 899 | static void l2cap_chan_ready(struct sock *sk) |
| 900 | { |
| 901 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
| 902 | struct sock *parent = bt_sk(sk)->parent; |
| 903 | |
| 904 | BT_DBG("sk %p, parent %p", sk, parent); |
| 905 | |
| 906 | chan->conf_state = 0; |
| 907 | __clear_chan_timer(chan); |
| 908 | |
Vinicius Costa Gomes | 43f3dc4 | 2011-06-20 18:53:18 -0300 | [diff] [blame] | 909 | l2cap_state_change(chan, BT_CONNECTED); |
Vinicius Costa Gomes | f1cb9af | 2011-01-26 21:42:57 -0300 | [diff] [blame] | 910 | sk->sk_state_change(sk); |
| 911 | |
| 912 | if (parent) |
| 913 | parent->sk_data_ready(parent, 0); |
| 914 | } |
| 915 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 916 | static void l2cap_conn_ready(struct l2cap_conn *conn) |
| 917 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 918 | struct l2cap_chan *chan; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 919 | |
| 920 | BT_DBG("conn %p", conn); |
| 921 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 922 | if (!conn->hcon->out && conn->hcon->type == LE_LINK) |
| 923 | l2cap_le_conn_ready(conn); |
| 924 | |
Vinicius Costa Gomes | 160dc6a | 2011-08-19 21:06:55 -0300 | [diff] [blame] | 925 | if (conn->hcon->out && conn->hcon->type == LE_LINK) |
| 926 | smp_conn_security(conn, conn->hcon->pending_sec_level); |
| 927 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 928 | read_lock(&conn->chan_lock); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 929 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 930 | list_for_each_entry(chan, &conn->chan_l, list) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 931 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 932 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 933 | bh_lock_sock(sk); |
| 934 | |
Vinicius Costa Gomes | 6312845 | 2011-06-17 22:46:26 -0300 | [diff] [blame] | 935 | if (conn->hcon->type == LE_LINK) { |
Anderson Briglia | b501d6a | 2011-06-07 18:46:31 -0300 | [diff] [blame] | 936 | if (smp_conn_security(conn, chan->sec_level)) |
Vinicius Costa Gomes | f1cb9af | 2011-01-26 21:42:57 -0300 | [diff] [blame] | 937 | l2cap_chan_ready(sk); |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 938 | |
Vinicius Costa Gomes | 6312845 | 2011-06-17 22:46:26 -0300 | [diff] [blame] | 939 | } else if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 940 | __clear_chan_timer(chan); |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 941 | l2cap_state_change(chan, BT_CONNECTED); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 942 | sk->sk_state_change(sk); |
Anderson Briglia | b501d6a | 2011-06-07 18:46:31 -0300 | [diff] [blame] | 943 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 944 | } else if (chan->state == BT_CONNECT) |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 945 | l2cap_do_start(chan); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 946 | |
| 947 | bh_unlock_sock(sk); |
| 948 | } |
| 949 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 950 | read_unlock(&conn->chan_lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 951 | } |
| 952 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 953 | /* Notify sockets that we cannot guaranty reliability anymore */ |
| 954 | static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) |
| 955 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 956 | struct l2cap_chan *chan; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 957 | |
| 958 | BT_DBG("conn %p", conn); |
| 959 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 960 | read_lock(&conn->chan_lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 961 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 962 | list_for_each_entry(chan, &conn->chan_l, list) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 963 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 964 | |
Andrei Emeltchenko | ecf61bd | 2011-10-11 14:04:32 +0300 | [diff] [blame] | 965 | if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags)) |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 966 | sk->sk_err = err; |
| 967 | } |
| 968 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 969 | read_unlock(&conn->chan_lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 970 | } |
| 971 | |
| 972 | static void l2cap_info_timeout(unsigned long arg) |
| 973 | { |
| 974 | struct l2cap_conn *conn = (void *) arg; |
| 975 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 976 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 977 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 978 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 979 | l2cap_conn_start(conn); |
| 980 | } |
| 981 | |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 982 | static void l2cap_conn_del(struct hci_conn *hcon, int err) |
| 983 | { |
| 984 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 985 | struct l2cap_chan *chan, *l; |
| 986 | struct sock *sk; |
| 987 | |
| 988 | if (!conn) |
| 989 | return; |
| 990 | |
| 991 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); |
| 992 | |
| 993 | kfree_skb(conn->rx_skb); |
| 994 | |
| 995 | /* Kill channels */ |
| 996 | list_for_each_entry_safe(chan, l, &conn->chan_l, list) { |
| 997 | sk = chan->sk; |
| 998 | bh_lock_sock(sk); |
| 999 | l2cap_chan_del(chan, err); |
| 1000 | bh_unlock_sock(sk); |
| 1001 | chan->ops->close(chan->data); |
| 1002 | } |
| 1003 | |
| 1004 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) |
| 1005 | del_timer_sync(&conn->info_timer); |
| 1006 | |
Vinicius Costa Gomes | d26a234 | 2011-08-19 21:06:51 -0300 | [diff] [blame] | 1007 | if (test_and_clear_bit(HCI_CONN_LE_SMP_PEND, &hcon->pend)) { |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1008 | del_timer(&conn->security_timer); |
Vinicius Costa Gomes | 8aab475 | 2011-09-05 14:31:31 -0300 | [diff] [blame] | 1009 | smp_chan_destroy(conn); |
Vinicius Costa Gomes | d26a234 | 2011-08-19 21:06:51 -0300 | [diff] [blame] | 1010 | } |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1011 | |
| 1012 | hcon->l2cap_data = NULL; |
| 1013 | kfree(conn); |
| 1014 | } |
| 1015 | |
| 1016 | static void security_timeout(unsigned long arg) |
| 1017 | { |
| 1018 | struct l2cap_conn *conn = (void *) arg; |
| 1019 | |
| 1020 | l2cap_conn_del(conn->hcon, ETIMEDOUT); |
| 1021 | } |
| 1022 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1023 | static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) |
| 1024 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 1025 | struct l2cap_conn *conn = hcon->l2cap_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 1027 | if (conn || status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | return conn; |
| 1029 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 1030 | conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC); |
| 1031 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | |
| 1034 | hcon->l2cap_data = conn; |
| 1035 | conn->hcon = hcon; |
| 1036 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 1037 | BT_DBG("hcon %p conn %p", hcon, conn); |
| 1038 | |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 1039 | if (hcon->hdev->le_mtu && hcon->type == LE_LINK) |
| 1040 | conn->mtu = hcon->hdev->le_mtu; |
| 1041 | else |
| 1042 | conn->mtu = hcon->hdev->acl_mtu; |
| 1043 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | conn->src = &hcon->hdev->bdaddr; |
| 1045 | conn->dst = &hcon->dst; |
| 1046 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1047 | conn->feat_mask = 0; |
| 1048 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | spin_lock_init(&conn->lock); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1050 | rwlock_init(&conn->chan_lock); |
| 1051 | |
| 1052 | INIT_LIST_HEAD(&conn->chan_l); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1054 | if (hcon->type == LE_LINK) |
| 1055 | setup_timer(&conn->security_timer, security_timeout, |
| 1056 | (unsigned long) conn); |
| 1057 | else |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1058 | setup_timer(&conn->info_timer, l2cap_info_timeout, |
Dave Young | 45054dc | 2009-10-18 20:28:30 +0000 | [diff] [blame] | 1059 | (unsigned long) conn); |
| 1060 | |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 1061 | conn->disc_reason = 0x13; |
| 1062 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1063 | return conn; |
| 1064 | } |
| 1065 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1066 | static inline void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1068 | write_lock_bh(&conn->chan_lock); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1069 | __l2cap_chan_add(conn, chan); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1070 | write_unlock_bh(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | } |
| 1072 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1073 | /* ---- Socket interface ---- */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | |
| 1075 | /* Find socket with psm and source bdaddr. |
| 1076 | * Returns closest match. |
| 1077 | */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1078 | static struct l2cap_chan *l2cap_global_chan_by_psm(int state, __le16 psm, bdaddr_t *src) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1080 | struct l2cap_chan *c, *c1 = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1082 | read_lock(&chan_list_lock); |
Gustavo F. Padovan | e0f0cb5 | 2010-11-01 18:43:53 +0000 | [diff] [blame] | 1083 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1084 | list_for_each_entry(c, &chan_list, global_l) { |
| 1085 | struct sock *sk = c->sk; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1086 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1087 | if (state && c->state != state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | continue; |
| 1089 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1090 | if (c->psm == psm) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | /* Exact match. */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1092 | if (!bacmp(&bt_sk(sk)->src, src)) { |
Johannes Berg | a7567b2 | 2011-06-01 08:29:54 +0200 | [diff] [blame] | 1093 | read_unlock(&chan_list_lock); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1094 | return c; |
| 1095 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1096 | |
| 1097 | /* Closest match */ |
| 1098 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1099 | c1 = c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | } |
| 1101 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1103 | read_unlock(&chan_list_lock); |
Gustavo F. Padovan | e0f0cb5 | 2010-11-01 18:43:53 +0000 | [diff] [blame] | 1104 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1105 | return c1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1106 | } |
| 1107 | |
Gustavo F. Padovan | 77a74c7 | 2011-04-12 18:17:14 -0300 | [diff] [blame] | 1108 | int l2cap_chan_connect(struct l2cap_chan *chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | { |
Gustavo F. Padovan | 5d41ce1 | 2011-04-08 15:40:02 -0300 | [diff] [blame] | 1110 | struct sock *sk = chan->sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | bdaddr_t *src = &bt_sk(sk)->src; |
| 1112 | bdaddr_t *dst = &bt_sk(sk)->dst; |
| 1113 | struct l2cap_conn *conn; |
| 1114 | struct hci_conn *hcon; |
| 1115 | struct hci_dev *hdev; |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 1116 | __u8 auth_type; |
Marcel Holtmann | 44d0e48 | 2009-04-20 07:09:16 +0200 | [diff] [blame] | 1117 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1118 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1119 | BT_DBG("%s -> %s psm 0x%2.2x", batostr(src), batostr(dst), |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1120 | chan->psm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 1122 | hdev = hci_get_route(dst, src); |
| 1123 | if (!hdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | return -EHOSTUNREACH; |
| 1125 | |
| 1126 | hci_dev_lock_bh(hdev); |
| 1127 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1128 | auth_type = l2cap_get_auth_type(chan); |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 1129 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1130 | if (chan->dcid == L2CAP_CID_LE_DATA) |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 1131 | hcon = hci_connect(hdev, LE_LINK, dst, |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1132 | chan->sec_level, auth_type); |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 1133 | else |
| 1134 | hcon = hci_connect(hdev, ACL_LINK, dst, |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1135 | chan->sec_level, auth_type); |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 1136 | |
Ville Tervo | 30e7627 | 2011-02-22 16:10:53 -0300 | [diff] [blame] | 1137 | if (IS_ERR(hcon)) { |
| 1138 | err = PTR_ERR(hcon); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | goto done; |
Ville Tervo | 30e7627 | 2011-02-22 16:10:53 -0300 | [diff] [blame] | 1140 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | |
| 1142 | conn = l2cap_conn_add(hcon, 0); |
| 1143 | if (!conn) { |
| 1144 | hci_conn_put(hcon); |
Ville Tervo | 30e7627 | 2011-02-22 16:10:53 -0300 | [diff] [blame] | 1145 | err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | goto done; |
| 1147 | } |
| 1148 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1149 | /* Update source addr of the socket */ |
| 1150 | bacpy(src, conn->src); |
| 1151 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1152 | l2cap_chan_add(conn, chan); |
| 1153 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1154 | l2cap_state_change(chan, BT_CONNECT); |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 1155 | __set_chan_timer(chan, sk->sk_sndtimeo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | |
| 1157 | if (hcon->state == BT_CONNECTED) { |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 1158 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 1159 | __clear_chan_timer(chan); |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1160 | if (l2cap_check_security(chan)) |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1161 | l2cap_state_change(chan, BT_CONNECTED); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1162 | } else |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 1163 | l2cap_do_start(chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1164 | } |
| 1165 | |
Ville Tervo | 30e7627 | 2011-02-22 16:10:53 -0300 | [diff] [blame] | 1166 | err = 0; |
| 1167 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1168 | done: |
| 1169 | hci_dev_unlock_bh(hdev); |
| 1170 | hci_dev_put(hdev); |
| 1171 | return err; |
| 1172 | } |
| 1173 | |
Gustavo F. Padovan | dcba0db | 2011-02-04 03:08:36 -0200 | [diff] [blame] | 1174 | int __l2cap_wait_ack(struct sock *sk) |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1175 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1176 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1177 | DECLARE_WAITQUEUE(wait, current); |
| 1178 | int err = 0; |
| 1179 | int timeo = HZ/5; |
| 1180 | |
Marcel Holtmann | 2b0b05d | 2010-05-10 11:33:10 +0200 | [diff] [blame] | 1181 | add_wait_queue(sk_sleep(sk), &wait); |
Peter Hurley | a71a0cf | 2011-07-25 18:36:26 -0400 | [diff] [blame] | 1182 | set_current_state(TASK_INTERRUPTIBLE); |
| 1183 | while (chan->unacked_frames > 0 && chan->conn) { |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1184 | if (!timeo) |
| 1185 | timeo = HZ/5; |
| 1186 | |
| 1187 | if (signal_pending(current)) { |
| 1188 | err = sock_intr_errno(timeo); |
| 1189 | break; |
| 1190 | } |
| 1191 | |
| 1192 | release_sock(sk); |
| 1193 | timeo = schedule_timeout(timeo); |
| 1194 | lock_sock(sk); |
Peter Hurley | a71a0cf | 2011-07-25 18:36:26 -0400 | [diff] [blame] | 1195 | set_current_state(TASK_INTERRUPTIBLE); |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1196 | |
| 1197 | err = sock_error(sk); |
| 1198 | if (err) |
| 1199 | break; |
| 1200 | } |
| 1201 | set_current_state(TASK_RUNNING); |
Marcel Holtmann | 2b0b05d | 2010-05-10 11:33:10 +0200 | [diff] [blame] | 1202 | remove_wait_queue(sk_sleep(sk), &wait); |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1203 | return err; |
| 1204 | } |
| 1205 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1206 | static void l2cap_monitor_timeout(unsigned long arg) |
| 1207 | { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1208 | struct l2cap_chan *chan = (void *) arg; |
| 1209 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1210 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1211 | BT_DBG("chan %p", chan); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 1212 | |
Gustavo F. Padovan | e686219 | 2009-08-24 00:45:19 -0300 | [diff] [blame] | 1213 | bh_lock_sock(sk); |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1214 | if (chan->retry_count >= chan->remote_max_tx) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1215 | l2cap_send_disconn_req(chan->conn, chan, ECONNABORTED); |
Andrei Emeltchenko | b13f586 | 2009-12-15 11:38:04 +0200 | [diff] [blame] | 1216 | bh_unlock_sock(sk); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1217 | return; |
| 1218 | } |
| 1219 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1220 | chan->retry_count++; |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 1221 | __set_monitor_timer(chan); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1222 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1223 | l2cap_send_rr_or_rnr(chan, L2CAP_CTRL_POLL); |
Gustavo F. Padovan | e686219 | 2009-08-24 00:45:19 -0300 | [diff] [blame] | 1224 | bh_unlock_sock(sk); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1225 | } |
| 1226 | |
| 1227 | static void l2cap_retrans_timeout(unsigned long arg) |
| 1228 | { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1229 | struct l2cap_chan *chan = (void *) arg; |
| 1230 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1231 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 1232 | BT_DBG("chan %p", chan); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 1233 | |
Gustavo F. Padovan | e686219 | 2009-08-24 00:45:19 -0300 | [diff] [blame] | 1234 | bh_lock_sock(sk); |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1235 | chan->retry_count = 1; |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 1236 | __set_monitor_timer(chan); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1237 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1238 | set_bit(CONN_WAIT_F, &chan->conn_state); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1239 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1240 | l2cap_send_rr_or_rnr(chan, L2CAP_CTRL_POLL); |
Gustavo F. Padovan | e686219 | 2009-08-24 00:45:19 -0300 | [diff] [blame] | 1241 | bh_unlock_sock(sk); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1242 | } |
| 1243 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1244 | static void l2cap_drop_acked_frames(struct l2cap_chan *chan) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1245 | { |
| 1246 | struct sk_buff *skb; |
| 1247 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1248 | while ((skb = skb_peek(&chan->tx_q)) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1249 | chan->unacked_frames) { |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1250 | if (bt_cb(skb)->tx_seq == chan->expected_ack_seq) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1251 | break; |
| 1252 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1253 | skb = skb_dequeue(&chan->tx_q); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1254 | kfree_skb(skb); |
| 1255 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1256 | chan->unacked_frames--; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1257 | } |
| 1258 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1259 | if (!chan->unacked_frames) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 1260 | __clear_retrans_timer(chan); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1261 | } |
| 1262 | |
Szymon Janc | 67c9e84 | 2011-07-28 16:24:33 +0200 | [diff] [blame] | 1263 | static void l2cap_do_send(struct l2cap_chan *chan, struct sk_buff *skb) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1264 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1265 | struct hci_conn *hcon = chan->conn->hcon; |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 1266 | u16 flags; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1267 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1268 | BT_DBG("chan %p, skb %p len %d", chan, skb, skb->len); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1269 | |
Andrei Emeltchenko | d57b0e8 | 2011-10-11 14:04:31 +0300 | [diff] [blame] | 1270 | if (!test_bit(FLAG_FLUSHABLE, &chan->flags) && |
| 1271 | lmp_no_flush_capable(hcon->hdev)) |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 1272 | flags = ACL_START_NO_FLUSH; |
| 1273 | else |
| 1274 | flags = ACL_START; |
| 1275 | |
Andrei Emeltchenko | 15770b1 | 2011-10-11 14:04:33 +0300 | [diff] [blame] | 1276 | bt_cb(skb)->force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags); |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 1277 | hci_send_acl(hcon, skb, flags); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1278 | } |
| 1279 | |
Szymon Janc | 67c9e84 | 2011-07-28 16:24:33 +0200 | [diff] [blame] | 1280 | static void l2cap_streaming_send(struct l2cap_chan *chan) |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1281 | { |
Gustavo F. Padovan | ccbb84a | 2010-08-30 18:44:44 -0300 | [diff] [blame] | 1282 | struct sk_buff *skb; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1283 | u32 control; |
| 1284 | u16 fcs; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1285 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1286 | while ((skb = skb_dequeue(&chan->tx_q))) { |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1287 | control = __get_control(chan, skb->data + L2CAP_HDR_SIZE); |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 1288 | control |= __set_txseq(chan, chan->next_tx_seq); |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1289 | __put_control(chan, control, skb->data + L2CAP_HDR_SIZE); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1290 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1291 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 1292 | fcs = crc16(0, (u8 *)skb->data, |
| 1293 | skb->len - L2CAP_FCS_SIZE); |
| 1294 | put_unaligned_le16(fcs, |
| 1295 | skb->data + skb->len - L2CAP_FCS_SIZE); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1296 | } |
| 1297 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1298 | l2cap_do_send(chan, skb); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1299 | |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 1300 | chan->next_tx_seq = __next_seq(chan, chan->next_tx_seq); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1301 | } |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1302 | } |
| 1303 | |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 1304 | 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] | 1305 | { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1306 | struct sk_buff *skb, *tx_skb; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1307 | u16 fcs; |
| 1308 | u32 control; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1309 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1310 | skb = skb_peek(&chan->tx_q); |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1311 | if (!skb) |
| 1312 | return; |
| 1313 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1314 | do { |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1315 | if (bt_cb(skb)->tx_seq == tx_seq) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1316 | break; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1317 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1318 | if (skb_queue_is_last(&chan->tx_q, skb)) |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1319 | return; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1320 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1321 | } while ((skb = skb_queue_next(&chan->tx_q, skb))); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1322 | |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1323 | if (chan->remote_max_tx && |
| 1324 | bt_cb(skb)->retries == chan->remote_max_tx) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1325 | l2cap_send_disconn_req(chan->conn, chan, ECONNABORTED); |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1326 | return; |
| 1327 | } |
| 1328 | |
| 1329 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
| 1330 | bt_cb(skb)->retries++; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1331 | |
| 1332 | control = __get_control(chan, tx_skb->data + L2CAP_HDR_SIZE); |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 1333 | control &= __get_sar_mask(chan); |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 1334 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1335 | if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state)) |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 1336 | control |= __set_ctrl_final(chan); |
Gustavo F. Padovan | 95ffa97 | 2010-06-18 20:37:33 -0300 | [diff] [blame] | 1337 | |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 1338 | control |= __set_reqseq(chan, chan->buffer_seq); |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 1339 | control |= __set_txseq(chan, tx_seq); |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 1340 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1341 | __put_control(chan, control, tx_skb->data + L2CAP_HDR_SIZE); |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1342 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1343 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 1344 | fcs = crc16(0, (u8 *)tx_skb->data, |
| 1345 | tx_skb->len - L2CAP_FCS_SIZE); |
| 1346 | put_unaligned_le16(fcs, |
| 1347 | tx_skb->data + tx_skb->len - L2CAP_FCS_SIZE); |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1348 | } |
| 1349 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1350 | l2cap_do_send(chan, tx_skb); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1351 | } |
| 1352 | |
Szymon Janc | 67c9e84 | 2011-07-28 16:24:33 +0200 | [diff] [blame] | 1353 | static int l2cap_ertm_send(struct l2cap_chan *chan) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1354 | { |
| 1355 | struct sk_buff *skb, *tx_skb; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1356 | u16 fcs; |
| 1357 | u32 control; |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1358 | int nsent = 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1359 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1360 | if (chan->state != BT_CONNECTED) |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 1361 | return -ENOTCONN; |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1362 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1363 | while ((skb = chan->tx_send_head) && (!l2cap_tx_window_full(chan))) { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1364 | |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1365 | if (chan->remote_max_tx && |
| 1366 | bt_cb(skb)->retries == chan->remote_max_tx) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1367 | l2cap_send_disconn_req(chan->conn, chan, ECONNABORTED); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1368 | break; |
| 1369 | } |
| 1370 | |
Andrei Emeltchenko | e420aba | 2009-12-23 13:07:14 +0200 | [diff] [blame] | 1371 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
| 1372 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1373 | bt_cb(skb)->retries++; |
| 1374 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1375 | control = __get_control(chan, tx_skb->data + L2CAP_HDR_SIZE); |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 1376 | control &= __get_sar_mask(chan); |
Gustavo F. Padovan | 95ffa97 | 2010-06-18 20:37:33 -0300 | [diff] [blame] | 1377 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1378 | if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state)) |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 1379 | control |= __set_ctrl_final(chan); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1380 | |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 1381 | control |= __set_reqseq(chan, chan->buffer_seq); |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 1382 | control |= __set_txseq(chan, chan->next_tx_seq); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1383 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1384 | __put_control(chan, control, tx_skb->data + L2CAP_HDR_SIZE); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1385 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1386 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 1387 | fcs = crc16(0, (u8 *)skb->data, |
| 1388 | tx_skb->len - L2CAP_FCS_SIZE); |
| 1389 | put_unaligned_le16(fcs, skb->data + |
| 1390 | tx_skb->len - L2CAP_FCS_SIZE); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1391 | } |
| 1392 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1393 | l2cap_do_send(chan, tx_skb); |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1394 | |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 1395 | __set_retrans_timer(chan); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1396 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1397 | bt_cb(skb)->tx_seq = chan->next_tx_seq; |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 1398 | |
| 1399 | chan->next_tx_seq = __next_seq(chan, chan->next_tx_seq); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1400 | |
Suraj Sumangala | 23e9fde | 2011-03-09 14:44:05 +0530 | [diff] [blame] | 1401 | if (bt_cb(skb)->retries == 1) |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1402 | chan->unacked_frames++; |
Suraj Sumangala | 23e9fde | 2011-03-09 14:44:05 +0530 | [diff] [blame] | 1403 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1404 | chan->frames_sent++; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1405 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1406 | if (skb_queue_is_last(&chan->tx_q, skb)) |
| 1407 | chan->tx_send_head = NULL; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1408 | else |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1409 | chan->tx_send_head = skb_queue_next(&chan->tx_q, skb); |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1410 | |
| 1411 | nsent++; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1412 | } |
| 1413 | |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1414 | return nsent; |
| 1415 | } |
| 1416 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1417 | static int l2cap_retransmit_frames(struct l2cap_chan *chan) |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1418 | { |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1419 | int ret; |
| 1420 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1421 | if (!skb_queue_empty(&chan->tx_q)) |
| 1422 | chan->tx_send_head = chan->tx_q.next; |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1423 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1424 | chan->next_tx_seq = chan->expected_ack_seq; |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1425 | ret = l2cap_ertm_send(chan); |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1426 | return ret; |
| 1427 | } |
| 1428 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1429 | static void l2cap_send_ack(struct l2cap_chan *chan) |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1430 | { |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1431 | u32 control = 0; |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1432 | |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 1433 | control |= __set_reqseq(chan, chan->buffer_seq); |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1434 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1435 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 1436 | control |= __set_ctrl_super(chan, L2CAP_SUPER_RNR); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1437 | set_bit(CONN_RNR_SENT, &chan->conn_state); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1438 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1439 | return; |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1440 | } |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1441 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1442 | if (l2cap_ertm_send(chan) > 0) |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1443 | return; |
| 1444 | |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 1445 | control |= __set_ctrl_super(chan, L2CAP_SUPER_RR); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1446 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1447 | } |
| 1448 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1449 | static void l2cap_send_srejtail(struct l2cap_chan *chan) |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 1450 | { |
| 1451 | struct srej_list *tail; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1452 | u32 control; |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 1453 | |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 1454 | control = __set_ctrl_super(chan, L2CAP_SUPER_SREJ); |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 1455 | control |= __set_ctrl_final(chan); |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 1456 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 1457 | tail = list_entry((&chan->srej_l)->prev, struct srej_list, list); |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 1458 | control |= __set_reqseq(chan, tail->tx_seq); |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 1459 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1460 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 1461 | } |
| 1462 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1463 | static inline int l2cap_skbuff_fromiovec(struct sock *sk, struct msghdr *msg, int len, int count, struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1464 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1465 | struct l2cap_conn *conn = l2cap_pi(sk)->chan->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1466 | struct sk_buff **frag; |
| 1467 | int err, sent = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1468 | |
Gustavo F. Padovan | 59203a2 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1469 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1470 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1471 | |
| 1472 | sent += count; |
| 1473 | len -= count; |
| 1474 | |
| 1475 | /* Continuation fragments (no L2CAP header) */ |
| 1476 | frag = &skb_shinfo(skb)->frag_list; |
| 1477 | while (len) { |
| 1478 | count = min_t(unsigned int, conn->mtu, len); |
| 1479 | |
| 1480 | *frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err); |
| 1481 | if (!*frag) |
Gustavo F. Padovan | 0175d62 | 2010-09-24 20:30:57 -0300 | [diff] [blame] | 1482 | return err; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1483 | if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) |
| 1484 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1485 | |
| 1486 | sent += count; |
| 1487 | len -= count; |
| 1488 | |
| 1489 | frag = &(*frag)->next; |
| 1490 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1491 | |
| 1492 | return sent; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1493 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1494 | |
Szymon Janc | 67c9e84 | 2011-07-28 16:24:33 +0200 | [diff] [blame] | 1495 | static struct sk_buff *l2cap_create_connless_pdu(struct l2cap_chan *chan, struct msghdr *msg, size_t len) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1496 | { |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1497 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1498 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1499 | struct sk_buff *skb; |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 1500 | int err, count, hlen = L2CAP_HDR_SIZE + L2CAP_PSMLEN_SIZE; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1501 | struct l2cap_hdr *lh; |
| 1502 | |
| 1503 | BT_DBG("sk %p len %d", sk, (int)len); |
| 1504 | |
| 1505 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
| 1506 | skb = bt_skb_send_alloc(sk, count + hlen, |
| 1507 | msg->msg_flags & MSG_DONTWAIT, &err); |
| 1508 | if (!skb) |
Gustavo F. Padovan | 0175d62 | 2010-09-24 20:30:57 -0300 | [diff] [blame] | 1509 | return ERR_PTR(err); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1510 | |
| 1511 | /* Create L2CAP header */ |
| 1512 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1513 | lh->cid = cpu_to_le16(chan->dcid); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1514 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1515 | put_unaligned_le16(chan->psm, skb_put(skb, 2)); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1516 | |
| 1517 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); |
| 1518 | if (unlikely(err < 0)) { |
| 1519 | kfree_skb(skb); |
| 1520 | return ERR_PTR(err); |
| 1521 | } |
| 1522 | return skb; |
| 1523 | } |
| 1524 | |
Szymon Janc | 67c9e84 | 2011-07-28 16:24:33 +0200 | [diff] [blame] | 1525 | static struct sk_buff *l2cap_create_basic_pdu(struct l2cap_chan *chan, struct msghdr *msg, size_t len) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1526 | { |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1527 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1528 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1529 | struct sk_buff *skb; |
| 1530 | int err, count, hlen = L2CAP_HDR_SIZE; |
| 1531 | struct l2cap_hdr *lh; |
| 1532 | |
| 1533 | BT_DBG("sk %p len %d", sk, (int)len); |
| 1534 | |
| 1535 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
| 1536 | skb = bt_skb_send_alloc(sk, count + hlen, |
| 1537 | msg->msg_flags & MSG_DONTWAIT, &err); |
| 1538 | if (!skb) |
Gustavo F. Padovan | 0175d62 | 2010-09-24 20:30:57 -0300 | [diff] [blame] | 1539 | return ERR_PTR(err); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1540 | |
| 1541 | /* Create L2CAP header */ |
| 1542 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1543 | lh->cid = cpu_to_le16(chan->dcid); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1544 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); |
| 1545 | |
| 1546 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); |
| 1547 | if (unlikely(err < 0)) { |
| 1548 | kfree_skb(skb); |
| 1549 | return ERR_PTR(err); |
| 1550 | } |
| 1551 | return skb; |
| 1552 | } |
| 1553 | |
Luiz Augusto von Dentz | ab0ff76 | 2011-09-12 20:00:50 +0300 | [diff] [blame] | 1554 | static struct sk_buff *l2cap_create_iframe_pdu(struct l2cap_chan *chan, |
| 1555 | struct msghdr *msg, size_t len, |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1556 | u32 control, u16 sdulen) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1557 | { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1558 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1559 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1560 | struct sk_buff *skb; |
Andrei Emeltchenko | e4ca6d9 | 2011-10-11 13:37:52 +0300 | [diff] [blame] | 1561 | int err, count, hlen; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1562 | struct l2cap_hdr *lh; |
| 1563 | |
| 1564 | BT_DBG("sk %p len %d", sk, (int)len); |
| 1565 | |
Gustavo F. Padovan | 0ee0d20 | 2010-05-01 16:15:41 -0300 | [diff] [blame] | 1566 | if (!conn) |
| 1567 | return ERR_PTR(-ENOTCONN); |
| 1568 | |
Andrei Emeltchenko | e4ca6d9 | 2011-10-11 13:37:52 +0300 | [diff] [blame] | 1569 | if (test_bit(FLAG_EXT_CTRL, &chan->flags)) |
| 1570 | hlen = L2CAP_EXT_HDR_SIZE; |
| 1571 | else |
| 1572 | hlen = L2CAP_ENH_HDR_SIZE; |
| 1573 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1574 | if (sdulen) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 1575 | hlen += L2CAP_SDULEN_SIZE; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1576 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1577 | if (chan->fcs == L2CAP_FCS_CRC16) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 1578 | hlen += L2CAP_FCS_SIZE; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1579 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1580 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
| 1581 | skb = bt_skb_send_alloc(sk, count + hlen, |
| 1582 | msg->msg_flags & MSG_DONTWAIT, &err); |
| 1583 | if (!skb) |
Gustavo F. Padovan | 0175d62 | 2010-09-24 20:30:57 -0300 | [diff] [blame] | 1584 | return ERR_PTR(err); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1585 | |
| 1586 | /* Create L2CAP header */ |
| 1587 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1588 | lh->cid = cpu_to_le16(chan->dcid); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1589 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1590 | |
| 1591 | __put_control(chan, control, skb_put(skb, __ctrl_size(chan))); |
| 1592 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1593 | if (sdulen) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 1594 | put_unaligned_le16(sdulen, skb_put(skb, L2CAP_SDULEN_SIZE)); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1595 | |
| 1596 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); |
| 1597 | if (unlikely(err < 0)) { |
| 1598 | kfree_skb(skb); |
| 1599 | return ERR_PTR(err); |
| 1600 | } |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1601 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1602 | if (chan->fcs == L2CAP_FCS_CRC16) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 1603 | put_unaligned_le16(0, skb_put(skb, L2CAP_FCS_SIZE)); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1604 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1605 | bt_cb(skb)->retries = 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1606 | return skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1607 | } |
| 1608 | |
Szymon Janc | 67c9e84 | 2011-07-28 16:24:33 +0200 | [diff] [blame] | 1609 | 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] | 1610 | { |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1611 | struct sk_buff *skb; |
| 1612 | struct sk_buff_head sar_queue; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1613 | u32 control; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1614 | size_t size = 0; |
| 1615 | |
Gustavo F. Padovan | ff12fd6 | 2010-05-05 22:09:15 -0300 | [diff] [blame] | 1616 | skb_queue_head_init(&sar_queue); |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 1617 | control = __set_ctrl_sar(chan, L2CAP_SAR_START); |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1618 | 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] | 1619 | if (IS_ERR(skb)) |
| 1620 | return PTR_ERR(skb); |
| 1621 | |
| 1622 | __skb_queue_tail(&sar_queue, skb); |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1623 | len -= chan->remote_mps; |
| 1624 | size += chan->remote_mps; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1625 | |
| 1626 | while (len > 0) { |
| 1627 | size_t buflen; |
| 1628 | |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1629 | if (len > chan->remote_mps) { |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 1630 | control = __set_ctrl_sar(chan, L2CAP_SAR_CONTINUE); |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1631 | buflen = chan->remote_mps; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1632 | } else { |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 1633 | control = __set_ctrl_sar(chan, L2CAP_SAR_END); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1634 | buflen = len; |
| 1635 | } |
| 1636 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1637 | skb = l2cap_create_iframe_pdu(chan, msg, buflen, control, 0); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1638 | if (IS_ERR(skb)) { |
| 1639 | skb_queue_purge(&sar_queue); |
| 1640 | return PTR_ERR(skb); |
| 1641 | } |
| 1642 | |
| 1643 | __skb_queue_tail(&sar_queue, skb); |
| 1644 | len -= buflen; |
| 1645 | size += buflen; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1646 | } |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1647 | skb_queue_splice_tail(&sar_queue, &chan->tx_q); |
| 1648 | if (chan->tx_send_head == NULL) |
| 1649 | chan->tx_send_head = sar_queue.next; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1650 | |
| 1651 | return size; |
| 1652 | } |
| 1653 | |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 1654 | int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len) |
| 1655 | { |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 1656 | struct sk_buff *skb; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 1657 | u32 control; |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 1658 | int err; |
| 1659 | |
| 1660 | /* Connectionless channel */ |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 1661 | if (chan->chan_type == L2CAP_CHAN_CONN_LESS) { |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 1662 | skb = l2cap_create_connless_pdu(chan, msg, len); |
| 1663 | if (IS_ERR(skb)) |
| 1664 | return PTR_ERR(skb); |
| 1665 | |
| 1666 | l2cap_do_send(chan, skb); |
| 1667 | return len; |
| 1668 | } |
| 1669 | |
| 1670 | switch (chan->mode) { |
| 1671 | case L2CAP_MODE_BASIC: |
| 1672 | /* Check outgoing MTU */ |
| 1673 | if (len > chan->omtu) |
| 1674 | return -EMSGSIZE; |
| 1675 | |
| 1676 | /* Create a basic PDU */ |
| 1677 | skb = l2cap_create_basic_pdu(chan, msg, len); |
| 1678 | if (IS_ERR(skb)) |
| 1679 | return PTR_ERR(skb); |
| 1680 | |
| 1681 | l2cap_do_send(chan, skb); |
| 1682 | err = len; |
| 1683 | break; |
| 1684 | |
| 1685 | case L2CAP_MODE_ERTM: |
| 1686 | case L2CAP_MODE_STREAMING: |
| 1687 | /* Entire SDU fits into one PDU */ |
| 1688 | if (len <= chan->remote_mps) { |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 1689 | control = __set_ctrl_sar(chan, L2CAP_SAR_UNSEGMENTED); |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 1690 | skb = l2cap_create_iframe_pdu(chan, msg, len, control, |
| 1691 | 0); |
| 1692 | if (IS_ERR(skb)) |
| 1693 | return PTR_ERR(skb); |
| 1694 | |
| 1695 | __skb_queue_tail(&chan->tx_q, skb); |
| 1696 | |
| 1697 | if (chan->tx_send_head == NULL) |
| 1698 | chan->tx_send_head = skb; |
| 1699 | |
| 1700 | } else { |
| 1701 | /* Segment SDU into multiples PDUs */ |
| 1702 | err = l2cap_sar_segment_sdu(chan, msg, len); |
| 1703 | if (err < 0) |
| 1704 | return err; |
| 1705 | } |
| 1706 | |
| 1707 | if (chan->mode == L2CAP_MODE_STREAMING) { |
| 1708 | l2cap_streaming_send(chan); |
| 1709 | err = len; |
| 1710 | break; |
| 1711 | } |
| 1712 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1713 | if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state) && |
| 1714 | test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 1715 | err = len; |
| 1716 | break; |
| 1717 | } |
| 1718 | |
| 1719 | err = l2cap_ertm_send(chan); |
| 1720 | if (err >= 0) |
| 1721 | err = len; |
| 1722 | |
| 1723 | break; |
| 1724 | |
| 1725 | default: |
| 1726 | BT_DBG("bad state %1.1x", chan->mode); |
| 1727 | err = -EBADFD; |
| 1728 | } |
| 1729 | |
| 1730 | return err; |
| 1731 | } |
| 1732 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1733 | /* Copy frame to all raw sockets on that connection */ |
| 1734 | static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) |
| 1735 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1736 | struct sk_buff *nskb; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1737 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1738 | |
| 1739 | BT_DBG("conn %p", conn); |
| 1740 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1741 | read_lock(&conn->chan_lock); |
| 1742 | list_for_each_entry(chan, &conn->chan_l, list) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1743 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 1744 | if (chan->chan_type != L2CAP_CHAN_RAW) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1745 | continue; |
| 1746 | |
| 1747 | /* Don't send frame to the socket it came from */ |
| 1748 | if (skb->sk == sk) |
| 1749 | continue; |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 1750 | nskb = skb_clone(skb, GFP_ATOMIC); |
| 1751 | if (!nskb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1752 | continue; |
| 1753 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 1754 | if (chan->ops->recv(chan->data, nskb)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1755 | kfree_skb(nskb); |
| 1756 | } |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1757 | read_unlock(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1758 | } |
| 1759 | |
| 1760 | /* ---- L2CAP signalling commands ---- */ |
| 1761 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, |
| 1762 | u8 code, u8 ident, u16 dlen, void *data) |
| 1763 | { |
| 1764 | struct sk_buff *skb, **frag; |
| 1765 | struct l2cap_cmd_hdr *cmd; |
| 1766 | struct l2cap_hdr *lh; |
| 1767 | int len, count; |
| 1768 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 1769 | BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", |
| 1770 | conn, code, ident, dlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1771 | |
| 1772 | len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; |
| 1773 | count = min_t(unsigned int, conn->mtu, len); |
| 1774 | |
| 1775 | skb = bt_skb_alloc(count, GFP_ATOMIC); |
| 1776 | if (!skb) |
| 1777 | return NULL; |
| 1778 | |
| 1779 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1780 | lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 1781 | |
| 1782 | if (conn->hcon->type == LE_LINK) |
| 1783 | lh->cid = cpu_to_le16(L2CAP_CID_LE_SIGNALING); |
| 1784 | else |
| 1785 | lh->cid = cpu_to_le16(L2CAP_CID_SIGNALING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1786 | |
| 1787 | cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); |
| 1788 | cmd->code = code; |
| 1789 | cmd->ident = ident; |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1790 | cmd->len = cpu_to_le16(dlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1791 | |
| 1792 | if (dlen) { |
| 1793 | count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; |
| 1794 | memcpy(skb_put(skb, count), data, count); |
| 1795 | data += count; |
| 1796 | } |
| 1797 | |
| 1798 | len -= skb->len; |
| 1799 | |
| 1800 | /* Continuation fragments (no L2CAP header) */ |
| 1801 | frag = &skb_shinfo(skb)->frag_list; |
| 1802 | while (len) { |
| 1803 | count = min_t(unsigned int, conn->mtu, len); |
| 1804 | |
| 1805 | *frag = bt_skb_alloc(count, GFP_ATOMIC); |
| 1806 | if (!*frag) |
| 1807 | goto fail; |
| 1808 | |
| 1809 | memcpy(skb_put(*frag, count), data, count); |
| 1810 | |
| 1811 | len -= count; |
| 1812 | data += count; |
| 1813 | |
| 1814 | frag = &(*frag)->next; |
| 1815 | } |
| 1816 | |
| 1817 | return skb; |
| 1818 | |
| 1819 | fail: |
| 1820 | kfree_skb(skb); |
| 1821 | return NULL; |
| 1822 | } |
| 1823 | |
| 1824 | static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) |
| 1825 | { |
| 1826 | struct l2cap_conf_opt *opt = *ptr; |
| 1827 | int len; |
| 1828 | |
| 1829 | len = L2CAP_CONF_OPT_SIZE + opt->len; |
| 1830 | *ptr += len; |
| 1831 | |
| 1832 | *type = opt->type; |
| 1833 | *olen = opt->len; |
| 1834 | |
| 1835 | switch (opt->len) { |
| 1836 | case 1: |
| 1837 | *val = *((u8 *) opt->val); |
| 1838 | break; |
| 1839 | |
| 1840 | case 2: |
steven miao | bfaaeb3 | 2010-10-16 18:29:47 -0400 | [diff] [blame] | 1841 | *val = get_unaligned_le16(opt->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1842 | break; |
| 1843 | |
| 1844 | case 4: |
steven miao | bfaaeb3 | 2010-10-16 18:29:47 -0400 | [diff] [blame] | 1845 | *val = get_unaligned_le32(opt->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1846 | break; |
| 1847 | |
| 1848 | default: |
| 1849 | *val = (unsigned long) opt->val; |
| 1850 | break; |
| 1851 | } |
| 1852 | |
| 1853 | BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val); |
| 1854 | return len; |
| 1855 | } |
| 1856 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1857 | static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) |
| 1858 | { |
| 1859 | struct l2cap_conf_opt *opt = *ptr; |
| 1860 | |
| 1861 | BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val); |
| 1862 | |
| 1863 | opt->type = type; |
| 1864 | opt->len = len; |
| 1865 | |
| 1866 | switch (len) { |
| 1867 | case 1: |
| 1868 | *((u8 *) opt->val) = val; |
| 1869 | break; |
| 1870 | |
| 1871 | case 2: |
Gustavo F. Padovan | 4f8b691 | 2010-10-18 14:25:53 -0200 | [diff] [blame] | 1872 | put_unaligned_le16(val, opt->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1873 | break; |
| 1874 | |
| 1875 | case 4: |
Gustavo F. Padovan | 4f8b691 | 2010-10-18 14:25:53 -0200 | [diff] [blame] | 1876 | put_unaligned_le32(val, opt->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1877 | break; |
| 1878 | |
| 1879 | default: |
| 1880 | memcpy(opt->val, (void *) val, len); |
| 1881 | break; |
| 1882 | } |
| 1883 | |
| 1884 | *ptr += L2CAP_CONF_OPT_SIZE + len; |
| 1885 | } |
| 1886 | |
Andrei Emeltchenko | f89cef0 | 2011-10-13 16:18:55 +0300 | [diff] [blame] | 1887 | static void l2cap_add_opt_efs(void **ptr, struct l2cap_chan *chan) |
| 1888 | { |
| 1889 | struct l2cap_conf_efs efs; |
| 1890 | |
| 1891 | switch(chan->mode) { |
| 1892 | case L2CAP_MODE_ERTM: |
| 1893 | efs.id = chan->local_id; |
| 1894 | efs.stype = chan->local_stype; |
| 1895 | efs.msdu = cpu_to_le16(chan->local_msdu); |
| 1896 | efs.sdu_itime = cpu_to_le32(chan->local_sdu_itime); |
| 1897 | efs.acc_lat = cpu_to_le32(L2CAP_DEFAULT_ACC_LAT); |
| 1898 | efs.flush_to = cpu_to_le32(L2CAP_DEFAULT_FLUSH_TO); |
| 1899 | break; |
| 1900 | |
| 1901 | case L2CAP_MODE_STREAMING: |
| 1902 | efs.id = 1; |
| 1903 | efs.stype = L2CAP_SERV_BESTEFFORT; |
| 1904 | efs.msdu = cpu_to_le16(chan->local_msdu); |
| 1905 | efs.sdu_itime = cpu_to_le32(chan->local_sdu_itime); |
| 1906 | efs.acc_lat = 0; |
| 1907 | efs.flush_to = 0; |
| 1908 | break; |
| 1909 | |
| 1910 | default: |
| 1911 | return; |
| 1912 | } |
| 1913 | |
| 1914 | l2cap_add_conf_opt(ptr, L2CAP_CONF_EFS, sizeof(efs), |
| 1915 | (unsigned long) &efs); |
| 1916 | } |
| 1917 | |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 1918 | static void l2cap_ack_timeout(unsigned long arg) |
| 1919 | { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1920 | struct l2cap_chan *chan = (void *) arg; |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 1921 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1922 | bh_lock_sock(chan->sk); |
| 1923 | l2cap_send_ack(chan); |
| 1924 | bh_unlock_sock(chan->sk); |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 1925 | } |
| 1926 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1927 | static inline void l2cap_ertm_init(struct l2cap_chan *chan) |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 1928 | { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1929 | struct sock *sk = chan->sk; |
| 1930 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1931 | chan->expected_ack_seq = 0; |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1932 | chan->unacked_frames = 0; |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1933 | chan->buffer_seq = 0; |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1934 | chan->num_acked = 0; |
| 1935 | chan->frames_sent = 0; |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 1936 | |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 1937 | setup_timer(&chan->retrans_timer, l2cap_retrans_timeout, |
| 1938 | (unsigned long) chan); |
| 1939 | setup_timer(&chan->monitor_timer, l2cap_monitor_timeout, |
| 1940 | (unsigned long) chan); |
| 1941 | setup_timer(&chan->ack_timer, l2cap_ack_timeout, (unsigned long) chan); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 1942 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 1943 | skb_queue_head_init(&chan->srej_q); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1944 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 1945 | INIT_LIST_HEAD(&chan->srej_l); |
| 1946 | |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 1947 | |
| 1948 | sk->sk_backlog_rcv = l2cap_ertm_data_rcv; |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 1949 | } |
| 1950 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1951 | static inline __u8 l2cap_select_mode(__u8 mode, __u16 remote_feat_mask) |
| 1952 | { |
| 1953 | switch (mode) { |
| 1954 | case L2CAP_MODE_STREAMING: |
| 1955 | case L2CAP_MODE_ERTM: |
| 1956 | if (l2cap_mode_supported(mode, remote_feat_mask)) |
| 1957 | return mode; |
| 1958 | /* fall through */ |
| 1959 | default: |
| 1960 | return L2CAP_MODE_BASIC; |
| 1961 | } |
| 1962 | } |
| 1963 | |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 1964 | static inline bool __l2cap_ews_supported(struct l2cap_chan *chan) |
| 1965 | { |
| 1966 | return enable_hs && chan->conn->feat_mask & L2CAP_FEAT_EXT_WINDOW; |
| 1967 | } |
| 1968 | |
Andrei Emeltchenko | f89cef0 | 2011-10-13 16:18:55 +0300 | [diff] [blame] | 1969 | static inline bool __l2cap_efs_supported(struct l2cap_chan *chan) |
| 1970 | { |
| 1971 | return enable_hs && chan->conn->feat_mask & L2CAP_FEAT_EXT_FLOW; |
| 1972 | } |
| 1973 | |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 1974 | static inline void l2cap_txwin_setup(struct l2cap_chan *chan) |
| 1975 | { |
| 1976 | if (chan->tx_win > L2CAP_DEFAULT_TX_WINDOW && |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 1977 | __l2cap_ews_supported(chan)) { |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 1978 | /* use extended control field */ |
| 1979 | set_bit(FLAG_EXT_CTRL, &chan->flags); |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 1980 | chan->tx_win_max = L2CAP_DEFAULT_EXT_WINDOW; |
| 1981 | } else { |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 1982 | chan->tx_win = min_t(u16, chan->tx_win, |
| 1983 | L2CAP_DEFAULT_TX_WINDOW); |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 1984 | chan->tx_win_max = L2CAP_DEFAULT_TX_WINDOW; |
| 1985 | } |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 1986 | } |
| 1987 | |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 1988 | static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1989 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1990 | struct l2cap_conf_req *req = data; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 1991 | struct l2cap_conf_rfc rfc = { .mode = chan->mode }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1992 | void *ptr = req->data; |
Andrei Emeltchenko | c8f7916 | 2011-10-17 12:19:59 +0300 | [diff] [blame] | 1993 | u16 size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1994 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 1995 | BT_DBG("chan %p", chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1996 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 1997 | if (chan->num_conf_req || chan->num_conf_rsp) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1998 | goto done; |
| 1999 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2000 | switch (chan->mode) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2001 | case L2CAP_MODE_STREAMING: |
| 2002 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2003 | if (test_bit(CONF_STATE2_DEVICE, &chan->conf_state)) |
Gustavo F. Padovan | 85eb53c | 2010-06-03 18:43:28 -0300 | [diff] [blame] | 2004 | break; |
Gustavo F. Padovan | 85eb53c | 2010-06-03 18:43:28 -0300 | [diff] [blame] | 2005 | |
Andrei Emeltchenko | f89cef0 | 2011-10-13 16:18:55 +0300 | [diff] [blame] | 2006 | if (__l2cap_efs_supported(chan)) |
| 2007 | set_bit(FLAG_EFS_ENABLE, &chan->flags); |
| 2008 | |
Gustavo F. Padovan | 2ba13ed | 2010-06-09 16:39:05 -0300 | [diff] [blame] | 2009 | /* fall through */ |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2010 | default: |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2011 | chan->mode = l2cap_select_mode(rfc.mode, chan->conn->feat_mask); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2012 | break; |
| 2013 | } |
| 2014 | |
| 2015 | done: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2016 | if (chan->imtu != L2CAP_DEFAULT_MTU) |
| 2017 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu); |
Gustavo F. Padovan | 7990681c | 2011-01-24 16:01:43 -0200 | [diff] [blame] | 2018 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2019 | switch (chan->mode) { |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 2020 | case L2CAP_MODE_BASIC: |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2021 | if (!(chan->conn->feat_mask & L2CAP_FEAT_ERTM) && |
| 2022 | !(chan->conn->feat_mask & L2CAP_FEAT_STREAMING)) |
Gustavo F. Padovan | 6340650 | 2010-08-03 23:49:29 -0300 | [diff] [blame] | 2023 | break; |
| 2024 | |
Gustavo F. Padovan | 6254775 | 2010-06-08 20:05:31 -0300 | [diff] [blame] | 2025 | rfc.mode = L2CAP_MODE_BASIC; |
| 2026 | rfc.txwin_size = 0; |
| 2027 | rfc.max_transmit = 0; |
| 2028 | rfc.retrans_timeout = 0; |
| 2029 | rfc.monitor_timeout = 0; |
| 2030 | rfc.max_pdu_size = 0; |
| 2031 | |
Gustavo F. Padovan | 6340650 | 2010-08-03 23:49:29 -0300 | [diff] [blame] | 2032 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
| 2033 | (unsigned long) &rfc); |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 2034 | break; |
| 2035 | |
| 2036 | case L2CAP_MODE_ERTM: |
| 2037 | rfc.mode = L2CAP_MODE_ERTM; |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2038 | rfc.max_transmit = chan->max_tx; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2039 | rfc.retrans_timeout = 0; |
| 2040 | rfc.monitor_timeout = 0; |
Andrei Emeltchenko | c8f7916 | 2011-10-17 12:19:59 +0300 | [diff] [blame] | 2041 | |
| 2042 | size = min_t(u16, L2CAP_DEFAULT_MAX_PDU_SIZE, chan->conn->mtu - |
| 2043 | L2CAP_EXT_HDR_SIZE - |
| 2044 | L2CAP_SDULEN_SIZE - |
| 2045 | L2CAP_FCS_SIZE); |
| 2046 | rfc.max_pdu_size = cpu_to_le16(size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2047 | |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2048 | l2cap_txwin_setup(chan); |
| 2049 | |
| 2050 | rfc.txwin_size = min_t(u16, chan->tx_win, |
| 2051 | L2CAP_DEFAULT_TX_WINDOW); |
| 2052 | |
Gustavo F. Padovan | 6340650 | 2010-08-03 23:49:29 -0300 | [diff] [blame] | 2053 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
| 2054 | (unsigned long) &rfc); |
| 2055 | |
Andrei Emeltchenko | f89cef0 | 2011-10-13 16:18:55 +0300 | [diff] [blame] | 2056 | if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) |
| 2057 | l2cap_add_opt_efs(&ptr, chan); |
| 2058 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2059 | if (!(chan->conn->feat_mask & L2CAP_FEAT_FCS)) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2060 | break; |
| 2061 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2062 | if (chan->fcs == L2CAP_FCS_NONE || |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2063 | test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2064 | chan->fcs = L2CAP_FCS_NONE; |
| 2065 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, chan->fcs); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2066 | } |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2067 | |
| 2068 | if (test_bit(FLAG_EXT_CTRL, &chan->flags)) |
| 2069 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_EWS, 2, |
| 2070 | chan->tx_win); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2071 | break; |
| 2072 | |
| 2073 | case L2CAP_MODE_STREAMING: |
| 2074 | rfc.mode = L2CAP_MODE_STREAMING; |
| 2075 | rfc.txwin_size = 0; |
| 2076 | rfc.max_transmit = 0; |
| 2077 | rfc.retrans_timeout = 0; |
| 2078 | rfc.monitor_timeout = 0; |
Andrei Emeltchenko | c8f7916 | 2011-10-17 12:19:59 +0300 | [diff] [blame] | 2079 | |
| 2080 | size = min_t(u16, L2CAP_DEFAULT_MAX_PDU_SIZE, chan->conn->mtu - |
| 2081 | L2CAP_EXT_HDR_SIZE - |
| 2082 | L2CAP_SDULEN_SIZE - |
| 2083 | L2CAP_FCS_SIZE); |
| 2084 | rfc.max_pdu_size = cpu_to_le16(size); |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 2085 | |
Gustavo F. Padovan | 6340650 | 2010-08-03 23:49:29 -0300 | [diff] [blame] | 2086 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
| 2087 | (unsigned long) &rfc); |
| 2088 | |
Andrei Emeltchenko | f89cef0 | 2011-10-13 16:18:55 +0300 | [diff] [blame] | 2089 | if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) |
| 2090 | l2cap_add_opt_efs(&ptr, chan); |
| 2091 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2092 | if (!(chan->conn->feat_mask & L2CAP_FEAT_FCS)) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2093 | break; |
| 2094 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2095 | if (chan->fcs == L2CAP_FCS_NONE || |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2096 | test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2097 | chan->fcs = L2CAP_FCS_NONE; |
| 2098 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, chan->fcs); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2099 | } |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 2100 | break; |
| 2101 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2102 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2103 | req->dcid = cpu_to_le16(chan->dcid); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2104 | req->flags = cpu_to_le16(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2105 | |
| 2106 | return ptr - data; |
| 2107 | } |
| 2108 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2109 | static int l2cap_parse_conf_req(struct l2cap_chan *chan, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2110 | { |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2111 | struct l2cap_conf_rsp *rsp = data; |
| 2112 | void *ptr = rsp->data; |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2113 | void *req = chan->conf_req; |
| 2114 | int len = chan->conf_len; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2115 | int type, hint, olen; |
| 2116 | unsigned long val; |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2117 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 2118 | struct l2cap_conf_efs efs; |
| 2119 | u8 remote_efs = 0; |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 2120 | u16 mtu = L2CAP_DEFAULT_MTU; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2121 | u16 result = L2CAP_CONF_SUCCESS; |
Andrei Emeltchenko | c8f7916 | 2011-10-17 12:19:59 +0300 | [diff] [blame] | 2122 | u16 size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2123 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2124 | BT_DBG("chan %p", chan); |
Marcel Holtmann | 820ae1b | 2006-11-18 22:15:00 +0100 | [diff] [blame] | 2125 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2126 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 2127 | len -= l2cap_get_conf_opt(&req, &type, &olen, &val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2128 | |
Gustavo F. Padovan | 589d274 | 2009-04-20 01:31:07 -0300 | [diff] [blame] | 2129 | hint = type & L2CAP_CONF_HINT; |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 2130 | type &= L2CAP_CONF_MASK; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2131 | |
| 2132 | switch (type) { |
| 2133 | case L2CAP_CONF_MTU: |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 2134 | mtu = val; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2135 | break; |
| 2136 | |
| 2137 | case L2CAP_CONF_FLUSH_TO: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2138 | chan->flush_to = val; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2139 | break; |
| 2140 | |
| 2141 | case L2CAP_CONF_QOS: |
| 2142 | break; |
| 2143 | |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2144 | case L2CAP_CONF_RFC: |
| 2145 | if (olen == sizeof(rfc)) |
| 2146 | memcpy(&rfc, (void *) val, olen); |
| 2147 | break; |
| 2148 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2149 | case L2CAP_CONF_FCS: |
| 2150 | if (val == L2CAP_FCS_NONE) |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2151 | set_bit(CONF_NO_FCS_RECV, &chan->conf_state); |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 2152 | break; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2153 | |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 2154 | case L2CAP_CONF_EFS: |
| 2155 | remote_efs = 1; |
| 2156 | if (olen == sizeof(efs)) |
| 2157 | memcpy(&efs, (void *) val, olen); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2158 | break; |
| 2159 | |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2160 | case L2CAP_CONF_EWS: |
| 2161 | if (!enable_hs) |
| 2162 | return -ECONNREFUSED; |
| 2163 | |
| 2164 | set_bit(FLAG_EXT_CTRL, &chan->flags); |
| 2165 | set_bit(CONF_EWS_RECV, &chan->conf_state); |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 2166 | chan->tx_win_max = L2CAP_DEFAULT_EXT_WINDOW; |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2167 | chan->remote_tx_win = val; |
| 2168 | break; |
| 2169 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2170 | default: |
| 2171 | if (hint) |
| 2172 | break; |
| 2173 | |
| 2174 | result = L2CAP_CONF_UNKNOWN; |
| 2175 | *((u8 *) ptr++) = type; |
| 2176 | break; |
| 2177 | } |
| 2178 | } |
| 2179 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2180 | if (chan->num_conf_rsp || chan->num_conf_req > 1) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2181 | goto done; |
| 2182 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2183 | switch (chan->mode) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2184 | case L2CAP_MODE_STREAMING: |
| 2185 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2186 | if (!test_bit(CONF_STATE2_DEVICE, &chan->conf_state)) { |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2187 | chan->mode = l2cap_select_mode(rfc.mode, |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2188 | chan->conn->feat_mask); |
Gustavo F. Padovan | 85eb53c | 2010-06-03 18:43:28 -0300 | [diff] [blame] | 2189 | break; |
| 2190 | } |
| 2191 | |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 2192 | if (remote_efs) { |
| 2193 | if (__l2cap_efs_supported(chan)) |
| 2194 | set_bit(FLAG_EFS_ENABLE, &chan->flags); |
| 2195 | else |
| 2196 | return -ECONNREFUSED; |
| 2197 | } |
| 2198 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2199 | if (chan->mode != rfc.mode) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2200 | return -ECONNREFUSED; |
Gustavo F. Padovan | 742e519 | 2010-06-08 19:09:48 -0300 | [diff] [blame] | 2201 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2202 | break; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2203 | } |
| 2204 | |
| 2205 | done: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2206 | if (chan->mode != rfc.mode) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2207 | result = L2CAP_CONF_UNACCEPT; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2208 | rfc.mode = chan->mode; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2209 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2210 | if (chan->num_conf_rsp == 1) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2211 | return -ECONNREFUSED; |
| 2212 | |
| 2213 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2214 | sizeof(rfc), (unsigned long) &rfc); |
| 2215 | } |
| 2216 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2217 | if (result == L2CAP_CONF_SUCCESS) { |
| 2218 | /* Configure output options and let the other side know |
| 2219 | * which ones we don't like. */ |
| 2220 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2221 | if (mtu < L2CAP_DEFAULT_MIN_MTU) |
| 2222 | result = L2CAP_CONF_UNACCEPT; |
| 2223 | else { |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2224 | chan->omtu = mtu; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2225 | set_bit(CONF_MTU_DONE, &chan->conf_state); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2226 | } |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2227 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->omtu); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2228 | |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 2229 | if (remote_efs) { |
| 2230 | if (chan->local_stype != L2CAP_SERV_NOTRAFIC && |
| 2231 | efs.stype != L2CAP_SERV_NOTRAFIC && |
| 2232 | efs.stype != chan->local_stype) { |
| 2233 | |
| 2234 | result = L2CAP_CONF_UNACCEPT; |
| 2235 | |
| 2236 | if (chan->num_conf_req >= 1) |
| 2237 | return -ECONNREFUSED; |
| 2238 | |
| 2239 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, |
Gustavo F. Padovan | 3e6b3b9 | 2011-11-01 14:06:23 -0200 | [diff] [blame] | 2240 | sizeof(efs), |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 2241 | (unsigned long) &efs); |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 2242 | } else { |
Gustavo F. Padovan | 3e6b3b9 | 2011-11-01 14:06:23 -0200 | [diff] [blame] | 2243 | /* Send PENDING Conf Rsp */ |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 2244 | result = L2CAP_CONF_PENDING; |
| 2245 | set_bit(CONF_LOC_CONF_PEND, &chan->conf_state); |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 2246 | } |
| 2247 | } |
| 2248 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2249 | switch (rfc.mode) { |
| 2250 | case L2CAP_MODE_BASIC: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2251 | chan->fcs = L2CAP_FCS_NONE; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2252 | set_bit(CONF_MODE_DONE, &chan->conf_state); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2253 | break; |
| 2254 | |
| 2255 | case L2CAP_MODE_ERTM: |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2256 | if (!test_bit(CONF_EWS_RECV, &chan->conf_state)) |
| 2257 | chan->remote_tx_win = rfc.txwin_size; |
| 2258 | else |
| 2259 | rfc.txwin_size = L2CAP_DEFAULT_TX_WINDOW; |
| 2260 | |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 2261 | chan->remote_max_tx = rfc.max_transmit; |
Mat Martineau | 86b1b26 | 2010-08-05 15:54:22 -0700 | [diff] [blame] | 2262 | |
Andrei Emeltchenko | c8f7916 | 2011-10-17 12:19:59 +0300 | [diff] [blame] | 2263 | size = min_t(u16, le16_to_cpu(rfc.max_pdu_size), |
| 2264 | chan->conn->mtu - |
| 2265 | L2CAP_EXT_HDR_SIZE - |
| 2266 | L2CAP_SDULEN_SIZE - |
| 2267 | L2CAP_FCS_SIZE); |
| 2268 | rfc.max_pdu_size = cpu_to_le16(size); |
| 2269 | chan->remote_mps = size; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2270 | |
Gustavo F. Padovan | 10467e9 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2271 | rfc.retrans_timeout = |
| 2272 | le16_to_cpu(L2CAP_DEFAULT_RETRANS_TO); |
| 2273 | rfc.monitor_timeout = |
| 2274 | le16_to_cpu(L2CAP_DEFAULT_MONITOR_TO); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2275 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2276 | set_bit(CONF_MODE_DONE, &chan->conf_state); |
Gustavo F. Padovan | 68ae663 | 2009-10-17 21:41:01 -0300 | [diff] [blame] | 2277 | |
| 2278 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2279 | sizeof(rfc), (unsigned long) &rfc); |
| 2280 | |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 2281 | if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) { |
| 2282 | chan->remote_id = efs.id; |
| 2283 | chan->remote_stype = efs.stype; |
| 2284 | chan->remote_msdu = le16_to_cpu(efs.msdu); |
| 2285 | chan->remote_flush_to = |
| 2286 | le32_to_cpu(efs.flush_to); |
| 2287 | chan->remote_acc_lat = |
| 2288 | le32_to_cpu(efs.acc_lat); |
| 2289 | chan->remote_sdu_itime = |
| 2290 | le32_to_cpu(efs.sdu_itime); |
| 2291 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, |
| 2292 | sizeof(efs), (unsigned long) &efs); |
| 2293 | } |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2294 | break; |
| 2295 | |
| 2296 | case L2CAP_MODE_STREAMING: |
Andrei Emeltchenko | c8f7916 | 2011-10-17 12:19:59 +0300 | [diff] [blame] | 2297 | size = min_t(u16, le16_to_cpu(rfc.max_pdu_size), |
| 2298 | chan->conn->mtu - |
| 2299 | L2CAP_EXT_HDR_SIZE - |
| 2300 | L2CAP_SDULEN_SIZE - |
| 2301 | L2CAP_FCS_SIZE); |
| 2302 | rfc.max_pdu_size = cpu_to_le16(size); |
| 2303 | chan->remote_mps = size; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2304 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2305 | set_bit(CONF_MODE_DONE, &chan->conf_state); |
Gustavo F. Padovan | 68ae663 | 2009-10-17 21:41:01 -0300 | [diff] [blame] | 2306 | |
| 2307 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2308 | sizeof(rfc), (unsigned long) &rfc); |
| 2309 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2310 | break; |
| 2311 | |
| 2312 | default: |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2313 | result = L2CAP_CONF_UNACCEPT; |
| 2314 | |
| 2315 | memset(&rfc, 0, sizeof(rfc)); |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2316 | rfc.mode = chan->mode; |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2317 | } |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2318 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2319 | if (result == L2CAP_CONF_SUCCESS) |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2320 | set_bit(CONF_OUTPUT_DONE, &chan->conf_state); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2321 | } |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2322 | rsp->scid = cpu_to_le16(chan->dcid); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2323 | rsp->result = cpu_to_le16(result); |
| 2324 | rsp->flags = cpu_to_le16(0x0000); |
| 2325 | |
| 2326 | return ptr - data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2327 | } |
| 2328 | |
Gustavo F. Padovan | b445003 | 2011-04-12 18:15:09 -0300 | [diff] [blame] | 2329 | 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] | 2330 | { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2331 | struct l2cap_conf_req *req = data; |
| 2332 | void *ptr = req->data; |
| 2333 | int type, olen; |
| 2334 | unsigned long val; |
| 2335 | struct l2cap_conf_rfc rfc; |
| 2336 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2337 | 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] | 2338 | |
| 2339 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 2340 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); |
| 2341 | |
| 2342 | switch (type) { |
| 2343 | case L2CAP_CONF_MTU: |
| 2344 | if (val < L2CAP_DEFAULT_MIN_MTU) { |
| 2345 | *result = L2CAP_CONF_UNACCEPT; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2346 | chan->imtu = L2CAP_DEFAULT_MIN_MTU; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2347 | } else |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2348 | chan->imtu = val; |
| 2349 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2350 | break; |
| 2351 | |
| 2352 | case L2CAP_CONF_FLUSH_TO: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2353 | chan->flush_to = val; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2354 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2355 | 2, chan->flush_to); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2356 | break; |
| 2357 | |
| 2358 | case L2CAP_CONF_RFC: |
| 2359 | if (olen == sizeof(rfc)) |
| 2360 | memcpy(&rfc, (void *)val, olen); |
| 2361 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2362 | if (test_bit(CONF_STATE2_DEVICE, &chan->conf_state) && |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2363 | rfc.mode != chan->mode) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2364 | return -ECONNREFUSED; |
| 2365 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2366 | chan->fcs = 0; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2367 | |
| 2368 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2369 | sizeof(rfc), (unsigned long) &rfc); |
| 2370 | break; |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2371 | |
| 2372 | case L2CAP_CONF_EWS: |
| 2373 | chan->tx_win = min_t(u16, val, |
| 2374 | L2CAP_DEFAULT_EXT_WINDOW); |
Gustavo F. Padovan | 3e6b3b9 | 2011-11-01 14:06:23 -0200 | [diff] [blame] | 2375 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_EWS, 2, |
| 2376 | chan->tx_win); |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2377 | break; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2378 | } |
| 2379 | } |
| 2380 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2381 | if (chan->mode == L2CAP_MODE_BASIC && chan->mode != rfc.mode) |
Gustavo F. Padovan | 6c2ea7a | 2010-06-08 20:08:49 -0300 | [diff] [blame] | 2382 | return -ECONNREFUSED; |
| 2383 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2384 | chan->mode = rfc.mode; |
Gustavo F. Padovan | 6c2ea7a | 2010-06-08 20:08:49 -0300 | [diff] [blame] | 2385 | |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 2386 | if (*result == L2CAP_CONF_SUCCESS || *result == L2CAP_CONF_PENDING) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2387 | switch (rfc.mode) { |
| 2388 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2389 | chan->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); |
| 2390 | chan->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); |
| 2391 | chan->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2392 | break; |
| 2393 | case L2CAP_MODE_STREAMING: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2394 | chan->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2395 | } |
| 2396 | } |
| 2397 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2398 | req->dcid = cpu_to_le16(chan->dcid); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2399 | req->flags = cpu_to_le16(0x0000); |
| 2400 | |
| 2401 | return ptr - data; |
| 2402 | } |
| 2403 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2404 | 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] | 2405 | { |
| 2406 | struct l2cap_conf_rsp *rsp = data; |
| 2407 | void *ptr = rsp->data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2408 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2409 | BT_DBG("chan %p", chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2410 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2411 | rsp->scid = cpu_to_le16(chan->dcid); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2412 | rsp->result = cpu_to_le16(result); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2413 | rsp->flags = cpu_to_le16(flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2414 | |
| 2415 | return ptr - data; |
| 2416 | } |
| 2417 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2418 | void __l2cap_connect_rsp_defer(struct l2cap_chan *chan) |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2419 | { |
| 2420 | struct l2cap_conn_rsp rsp; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2421 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2422 | u8 buf[128]; |
| 2423 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2424 | rsp.scid = cpu_to_le16(chan->dcid); |
| 2425 | rsp.dcid = cpu_to_le16(chan->scid); |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2426 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); |
| 2427 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 2428 | l2cap_send_cmd(conn, chan->ident, |
| 2429 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
| 2430 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2431 | if (test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2432 | return; |
| 2433 | |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2434 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
| 2435 | l2cap_build_conf_req(chan, buf), buf); |
| 2436 | chan->num_conf_req++; |
| 2437 | } |
| 2438 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2439 | 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] | 2440 | { |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2441 | int type, olen; |
| 2442 | unsigned long val; |
| 2443 | struct l2cap_conf_rfc rfc; |
| 2444 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2445 | BT_DBG("chan %p, rsp %p, len %d", chan, rsp, len); |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2446 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2447 | if ((chan->mode != L2CAP_MODE_ERTM) && (chan->mode != L2CAP_MODE_STREAMING)) |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2448 | return; |
| 2449 | |
| 2450 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 2451 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); |
| 2452 | |
| 2453 | switch (type) { |
| 2454 | case L2CAP_CONF_RFC: |
| 2455 | if (olen == sizeof(rfc)) |
| 2456 | memcpy(&rfc, (void *)val, olen); |
| 2457 | goto done; |
| 2458 | } |
| 2459 | } |
| 2460 | |
| 2461 | done: |
| 2462 | switch (rfc.mode) { |
| 2463 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2464 | chan->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); |
| 2465 | chan->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); |
| 2466 | chan->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2467 | break; |
| 2468 | case L2CAP_MODE_STREAMING: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2469 | chan->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2470 | } |
| 2471 | } |
| 2472 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2473 | static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2474 | { |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 2475 | struct l2cap_cmd_rej_unk *rej = (struct l2cap_cmd_rej_unk *) data; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2476 | |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 2477 | if (rej->reason != L2CAP_REJ_NOT_UNDERSTOOD) |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2478 | return 0; |
| 2479 | |
| 2480 | if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) && |
| 2481 | cmd->ident == conn->info_ident) { |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2482 | del_timer(&conn->info_timer); |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2483 | |
| 2484 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 2485 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2486 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2487 | l2cap_conn_start(conn); |
| 2488 | } |
| 2489 | |
| 2490 | return 0; |
| 2491 | } |
| 2492 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2493 | static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2494 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2495 | struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; |
| 2496 | struct l2cap_conn_rsp rsp; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 2497 | struct l2cap_chan *chan = NULL, *pchan; |
Nathan Holstein | d793fe8 | 2010-10-15 11:54:02 -0400 | [diff] [blame] | 2498 | struct sock *parent, *sk = NULL; |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2499 | int result, status = L2CAP_CS_NO_INFO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2500 | |
| 2501 | u16 dcid = 0, scid = __le16_to_cpu(req->scid); |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2502 | __le16 psm = req->psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2503 | |
| 2504 | BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid); |
| 2505 | |
| 2506 | /* Check if we have socket listening on psm */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 2507 | pchan = l2cap_global_chan_by_psm(BT_LISTEN, psm, conn->src); |
| 2508 | if (!pchan) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2509 | result = L2CAP_CR_BAD_PSM; |
| 2510 | goto sendresp; |
| 2511 | } |
| 2512 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 2513 | parent = pchan->sk; |
| 2514 | |
Gustavo F. Padovan | e0f0cb5 | 2010-11-01 18:43:53 +0000 | [diff] [blame] | 2515 | bh_lock_sock(parent); |
| 2516 | |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2517 | /* Check if the ACL is secure enough (if not SDP) */ |
| 2518 | if (psm != cpu_to_le16(0x0001) && |
| 2519 | !hci_conn_check_link_mode(conn->hcon)) { |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 2520 | conn->disc_reason = 0x05; |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2521 | result = L2CAP_CR_SEC_BLOCK; |
| 2522 | goto response; |
| 2523 | } |
| 2524 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2525 | result = L2CAP_CR_NO_MEM; |
| 2526 | |
| 2527 | /* Check for backlog size */ |
| 2528 | if (sk_acceptq_is_full(parent)) { |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 2529 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2530 | goto response; |
| 2531 | } |
| 2532 | |
Gustavo F. Padovan | 80808e4 | 2011-05-16 17:24:37 -0300 | [diff] [blame] | 2533 | chan = pchan->ops->new_connection(pchan->data); |
| 2534 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2535 | goto response; |
| 2536 | |
Gustavo F. Padovan | 80808e4 | 2011-05-16 17:24:37 -0300 | [diff] [blame] | 2537 | sk = chan->sk; |
| 2538 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2539 | write_lock_bh(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2540 | |
| 2541 | /* Check if we already have channel with that dcid */ |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2542 | if (__l2cap_get_chan_by_dcid(conn, scid)) { |
| 2543 | write_unlock_bh(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2544 | sock_set_flag(sk, SOCK_ZAPPED); |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 2545 | chan->ops->close(chan->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2546 | goto response; |
| 2547 | } |
| 2548 | |
| 2549 | hci_conn_hold(conn->hcon); |
| 2550 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2551 | bacpy(&bt_sk(sk)->src, conn->src); |
| 2552 | bacpy(&bt_sk(sk)->dst, conn->dst); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2553 | chan->psm = psm; |
| 2554 | chan->dcid = scid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2555 | |
Gustavo F. Padovan | d101024 | 2011-03-25 00:39:48 -0300 | [diff] [blame] | 2556 | bt_accept_enqueue(parent, sk); |
| 2557 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2558 | __l2cap_chan_add(conn, chan); |
| 2559 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2560 | dcid = chan->scid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2561 | |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 2562 | __set_chan_timer(chan, sk->sk_sndtimeo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2563 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 2564 | chan->ident = cmd->ident; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2565 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2566 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 2567 | if (l2cap_check_security(chan)) { |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 2568 | if (bt_sk(sk)->defer_setup) { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2569 | l2cap_state_change(chan, BT_CONNECT2); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 2570 | result = L2CAP_CR_PEND; |
| 2571 | status = L2CAP_CS_AUTHOR_PEND; |
| 2572 | parent->sk_data_ready(parent, 0); |
| 2573 | } else { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2574 | l2cap_state_change(chan, BT_CONFIG); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 2575 | result = L2CAP_CR_SUCCESS; |
| 2576 | status = L2CAP_CS_NO_INFO; |
| 2577 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2578 | } else { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2579 | l2cap_state_change(chan, BT_CONNECT2); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2580 | result = L2CAP_CR_PEND; |
| 2581 | status = L2CAP_CS_AUTHEN_PEND; |
| 2582 | } |
| 2583 | } else { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2584 | l2cap_state_change(chan, BT_CONNECT2); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2585 | result = L2CAP_CR_PEND; |
| 2586 | status = L2CAP_CS_NO_INFO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2587 | } |
| 2588 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2589 | write_unlock_bh(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2590 | |
| 2591 | response: |
| 2592 | bh_unlock_sock(parent); |
| 2593 | |
| 2594 | sendresp: |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2595 | rsp.scid = cpu_to_le16(scid); |
| 2596 | rsp.dcid = cpu_to_le16(dcid); |
| 2597 | rsp.result = cpu_to_le16(result); |
| 2598 | rsp.status = cpu_to_le16(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2599 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2600 | |
| 2601 | if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) { |
| 2602 | struct l2cap_info_req info; |
| 2603 | info.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 2604 | |
| 2605 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; |
| 2606 | conn->info_ident = l2cap_get_ident(conn); |
| 2607 | |
| 2608 | mod_timer(&conn->info_timer, jiffies + |
| 2609 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); |
| 2610 | |
| 2611 | l2cap_send_cmd(conn, conn->info_ident, |
| 2612 | L2CAP_INFO_REQ, sizeof(info), &info); |
| 2613 | } |
| 2614 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2615 | if (chan && !test_bit(CONF_REQ_SENT, &chan->conf_state) && |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 2616 | result == L2CAP_CR_SUCCESS) { |
| 2617 | u8 buf[128]; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2618 | set_bit(CONF_REQ_SENT, &chan->conf_state); |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 2619 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2620 | l2cap_build_conf_req(chan, buf), buf); |
| 2621 | chan->num_conf_req++; |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 2622 | } |
| 2623 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2624 | return 0; |
| 2625 | } |
| 2626 | |
| 2627 | static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2628 | { |
| 2629 | struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; |
| 2630 | u16 scid, dcid, result, status; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2631 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2632 | struct sock *sk; |
| 2633 | u8 req[128]; |
| 2634 | |
| 2635 | scid = __le16_to_cpu(rsp->scid); |
| 2636 | dcid = __le16_to_cpu(rsp->dcid); |
| 2637 | result = __le16_to_cpu(rsp->result); |
| 2638 | status = __le16_to_cpu(rsp->status); |
| 2639 | |
| 2640 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid, scid, result, status); |
| 2641 | |
| 2642 | if (scid) { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2643 | chan = l2cap_get_chan_by_scid(conn, scid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2644 | if (!chan) |
João Paulo Rechi Vita | 57d3b22 | 2010-06-22 13:56:26 -0300 | [diff] [blame] | 2645 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2646 | } else { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2647 | chan = l2cap_get_chan_by_ident(conn, cmd->ident); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2648 | if (!chan) |
João Paulo Rechi Vita | 57d3b22 | 2010-06-22 13:56:26 -0300 | [diff] [blame] | 2649 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2650 | } |
| 2651 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2652 | sk = chan->sk; |
| 2653 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2654 | switch (result) { |
| 2655 | case L2CAP_CR_SUCCESS: |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2656 | l2cap_state_change(chan, BT_CONFIG); |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 2657 | chan->ident = 0; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2658 | chan->dcid = dcid; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2659 | clear_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Marcel Holtmann | 6a8d301 | 2009-02-06 23:56:36 +0100 | [diff] [blame] | 2660 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2661 | if (test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 2662 | break; |
| 2663 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2664 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2665 | l2cap_build_conf_req(chan, req), req); |
| 2666 | chan->num_conf_req++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2667 | break; |
| 2668 | |
| 2669 | case L2CAP_CR_PEND: |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2670 | set_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2671 | break; |
| 2672 | |
| 2673 | default: |
Andrei Emeltchenko | a49184c | 2010-11-03 12:32:44 +0200 | [diff] [blame] | 2674 | /* don't delete l2cap channel if sk is owned by user */ |
| 2675 | if (sock_owned_by_user(sk)) { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2676 | l2cap_state_change(chan, BT_DISCONN); |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 2677 | __clear_chan_timer(chan); |
| 2678 | __set_chan_timer(chan, HZ / 5); |
Andrei Emeltchenko | a49184c | 2010-11-03 12:32:44 +0200 | [diff] [blame] | 2679 | break; |
| 2680 | } |
| 2681 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2682 | l2cap_chan_del(chan, ECONNREFUSED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2683 | break; |
| 2684 | } |
| 2685 | |
| 2686 | bh_unlock_sock(sk); |
| 2687 | return 0; |
| 2688 | } |
| 2689 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2690 | static inline void set_default_fcs(struct l2cap_chan *chan) |
Mat Martineau | 8c462b6 | 2010-08-24 15:35:42 -0700 | [diff] [blame] | 2691 | { |
| 2692 | /* FCS is enabled only in ERTM or streaming mode, if one or both |
| 2693 | * sides request it. |
| 2694 | */ |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2695 | if (chan->mode != L2CAP_MODE_ERTM && chan->mode != L2CAP_MODE_STREAMING) |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2696 | chan->fcs = L2CAP_FCS_NONE; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2697 | else if (!test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2698 | chan->fcs = L2CAP_FCS_CRC16; |
Mat Martineau | 8c462b6 | 2010-08-24 15:35:42 -0700 | [diff] [blame] | 2699 | } |
| 2700 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 2701 | 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] | 2702 | { |
| 2703 | struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; |
| 2704 | u16 dcid, flags; |
| 2705 | u8 rsp[64]; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2706 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2707 | struct sock *sk; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2708 | int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2709 | |
| 2710 | dcid = __le16_to_cpu(req->dcid); |
| 2711 | flags = __le16_to_cpu(req->flags); |
| 2712 | |
| 2713 | BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); |
| 2714 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2715 | chan = l2cap_get_chan_by_scid(conn, dcid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2716 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2717 | return -ENOENT; |
| 2718 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2719 | sk = chan->sk; |
| 2720 | |
David S. Miller | 033b114 | 2011-07-21 13:38:42 -0700 | [diff] [blame] | 2721 | if (chan->state != BT_CONFIG && chan->state != BT_CONNECT2) { |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 2722 | struct l2cap_cmd_rej_cid rej; |
Gustavo F. Padovan | df6bd74 | 2010-06-14 02:26:15 -0300 | [diff] [blame] | 2723 | |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 2724 | rej.reason = cpu_to_le16(L2CAP_REJ_INVALID_CID); |
| 2725 | rej.scid = cpu_to_le16(chan->scid); |
| 2726 | rej.dcid = cpu_to_le16(chan->dcid); |
| 2727 | |
Gustavo F. Padovan | df6bd74 | 2010-06-14 02:26:15 -0300 | [diff] [blame] | 2728 | l2cap_send_cmd(conn, cmd->ident, L2CAP_COMMAND_REJ, |
| 2729 | sizeof(rej), &rej); |
Marcel Holtmann | 354f60a | 2006-11-18 22:15:20 +0100 | [diff] [blame] | 2730 | goto unlock; |
Gustavo F. Padovan | df6bd74 | 2010-06-14 02:26:15 -0300 | [diff] [blame] | 2731 | } |
Marcel Holtmann | 354f60a | 2006-11-18 22:15:20 +0100 | [diff] [blame] | 2732 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2733 | /* Reject if config buffer is too small. */ |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 2734 | len = cmd_len - sizeof(*req); |
Dan Rosenberg | 7ac2881 | 2011-06-24 08:38:05 -0400 | [diff] [blame] | 2735 | if (len < 0 || chan->conf_len + len > sizeof(chan->conf_req)) { |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2736 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2737 | l2cap_build_conf_rsp(chan, rsp, |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2738 | L2CAP_CONF_REJECT, flags), rsp); |
| 2739 | goto unlock; |
| 2740 | } |
| 2741 | |
| 2742 | /* Store config. */ |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2743 | memcpy(chan->conf_req + chan->conf_len, req->data, len); |
| 2744 | chan->conf_len += len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2745 | |
| 2746 | if (flags & 0x0001) { |
| 2747 | /* Incomplete config. Send empty response. */ |
| 2748 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2749 | l2cap_build_conf_rsp(chan, rsp, |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2750 | L2CAP_CONF_SUCCESS, 0x0001), rsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2751 | goto unlock; |
| 2752 | } |
| 2753 | |
| 2754 | /* Complete config. */ |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2755 | len = l2cap_parse_conf_req(chan, rsp); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2756 | if (len < 0) { |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 2757 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2758 | goto unlock; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2759 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2760 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2761 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2762 | chan->num_conf_rsp++; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2763 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2764 | /* Reset config buffer. */ |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2765 | chan->conf_len = 0; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2766 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2767 | if (!test_bit(CONF_OUTPUT_DONE, &chan->conf_state)) |
Marcel Holtmann | 876d948 | 2007-10-20 13:35:42 +0200 | [diff] [blame] | 2768 | goto unlock; |
| 2769 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2770 | if (test_bit(CONF_INPUT_DONE, &chan->conf_state)) { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2771 | set_default_fcs(chan); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2772 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2773 | l2cap_state_change(chan, BT_CONNECTED); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2774 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 2775 | chan->next_tx_seq = 0; |
| 2776 | chan->expected_tx_seq = 0; |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 2777 | skb_queue_head_init(&chan->tx_q); |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2778 | if (chan->mode == L2CAP_MODE_ERTM) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 2779 | l2cap_ertm_init(chan); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2780 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2781 | l2cap_chan_ready(sk); |
Marcel Holtmann | 876d948 | 2007-10-20 13:35:42 +0200 | [diff] [blame] | 2782 | goto unlock; |
| 2783 | } |
| 2784 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2785 | if (!test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2786 | u8 buf[64]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2787 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2788 | l2cap_build_conf_req(chan, buf), buf); |
| 2789 | chan->num_conf_req++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2790 | } |
| 2791 | |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 2792 | /* Got Conf Rsp PENDING from remote side and asume we sent |
| 2793 | Conf Rsp PENDING in the code above */ |
| 2794 | if (test_bit(CONF_REM_CONF_PEND, &chan->conf_state) && |
| 2795 | test_bit(CONF_LOC_CONF_PEND, &chan->conf_state)) { |
| 2796 | |
| 2797 | /* check compatibility */ |
| 2798 | |
| 2799 | clear_bit(CONF_LOC_CONF_PEND, &chan->conf_state); |
| 2800 | set_bit(CONF_OUTPUT_DONE, &chan->conf_state); |
| 2801 | |
| 2802 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
Gustavo F. Padovan | 3e6b3b9 | 2011-11-01 14:06:23 -0200 | [diff] [blame] | 2803 | l2cap_build_conf_rsp(chan, rsp, |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 2804 | L2CAP_CONF_SUCCESS, 0x0000), rsp); |
| 2805 | } |
| 2806 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2807 | unlock: |
| 2808 | bh_unlock_sock(sk); |
| 2809 | return 0; |
| 2810 | } |
| 2811 | |
| 2812 | static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2813 | { |
| 2814 | struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; |
| 2815 | u16 scid, flags, result; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2816 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2817 | struct sock *sk; |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2818 | int len = cmd->len - sizeof(*rsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2819 | |
| 2820 | scid = __le16_to_cpu(rsp->scid); |
| 2821 | flags = __le16_to_cpu(rsp->flags); |
| 2822 | result = __le16_to_cpu(rsp->result); |
| 2823 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2824 | BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x", |
| 2825 | scid, flags, result); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2826 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2827 | chan = l2cap_get_chan_by_scid(conn, scid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2828 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2829 | return 0; |
| 2830 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2831 | sk = chan->sk; |
| 2832 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2833 | switch (result) { |
| 2834 | case L2CAP_CONF_SUCCESS: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2835 | l2cap_conf_rfc_get(chan, rsp->data, len); |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 2836 | clear_bit(CONF_REM_CONF_PEND, &chan->conf_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2837 | break; |
| 2838 | |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 2839 | case L2CAP_CONF_PENDING: |
| 2840 | set_bit(CONF_REM_CONF_PEND, &chan->conf_state); |
| 2841 | |
| 2842 | if (test_bit(CONF_LOC_CONF_PEND, &chan->conf_state)) { |
| 2843 | char buf[64]; |
| 2844 | |
| 2845 | len = l2cap_parse_conf_rsp(chan, rsp->data, len, |
| 2846 | buf, &result); |
| 2847 | if (len < 0) { |
| 2848 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
| 2849 | goto done; |
| 2850 | } |
| 2851 | |
| 2852 | /* check compatibility */ |
| 2853 | |
| 2854 | clear_bit(CONF_LOC_CONF_PEND, &chan->conf_state); |
| 2855 | set_bit(CONF_OUTPUT_DONE, &chan->conf_state); |
| 2856 | |
| 2857 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
Gustavo F. Padovan | 3e6b3b9 | 2011-11-01 14:06:23 -0200 | [diff] [blame] | 2858 | l2cap_build_conf_rsp(chan, buf, |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 2859 | L2CAP_CONF_SUCCESS, 0x0000), buf); |
| 2860 | } |
| 2861 | goto done; |
| 2862 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2863 | case L2CAP_CONF_UNACCEPT: |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2864 | if (chan->num_conf_rsp <= L2CAP_CONF_MAX_CONF_RSP) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2865 | char req[64]; |
| 2866 | |
Andrei Emeltchenko | c2c77ec | 2010-03-19 10:26:28 +0200 | [diff] [blame] | 2867 | if (len > sizeof(req) - sizeof(struct l2cap_conf_req)) { |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 2868 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
Andrei Emeltchenko | c2c77ec | 2010-03-19 10:26:28 +0200 | [diff] [blame] | 2869 | goto done; |
| 2870 | } |
| 2871 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2872 | /* throw out any old stored conf requests */ |
| 2873 | result = L2CAP_CONF_SUCCESS; |
Gustavo F. Padovan | b445003 | 2011-04-12 18:15:09 -0300 | [diff] [blame] | 2874 | len = l2cap_parse_conf_rsp(chan, rsp->data, len, |
| 2875 | req, &result); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2876 | if (len < 0) { |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 2877 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2878 | goto done; |
| 2879 | } |
| 2880 | |
| 2881 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
| 2882 | L2CAP_CONF_REQ, len, req); |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2883 | chan->num_conf_req++; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2884 | if (result != L2CAP_CONF_SUCCESS) |
| 2885 | goto done; |
| 2886 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2887 | } |
| 2888 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 2889 | default: |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 2890 | sk->sk_err = ECONNRESET; |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 2891 | __set_chan_timer(chan, HZ * 5); |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 2892 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2893 | goto done; |
| 2894 | } |
| 2895 | |
| 2896 | if (flags & 0x01) |
| 2897 | goto done; |
| 2898 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2899 | set_bit(CONF_INPUT_DONE, &chan->conf_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2900 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2901 | if (test_bit(CONF_OUTPUT_DONE, &chan->conf_state)) { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2902 | set_default_fcs(chan); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2903 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2904 | l2cap_state_change(chan, BT_CONNECTED); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 2905 | chan->next_tx_seq = 0; |
| 2906 | chan->expected_tx_seq = 0; |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 2907 | skb_queue_head_init(&chan->tx_q); |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2908 | if (chan->mode == L2CAP_MODE_ERTM) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 2909 | l2cap_ertm_init(chan); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2910 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2911 | l2cap_chan_ready(sk); |
| 2912 | } |
| 2913 | |
| 2914 | done: |
| 2915 | bh_unlock_sock(sk); |
| 2916 | return 0; |
| 2917 | } |
| 2918 | |
| 2919 | static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2920 | { |
| 2921 | struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; |
| 2922 | struct l2cap_disconn_rsp rsp; |
| 2923 | u16 dcid, scid; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2924 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2925 | struct sock *sk; |
| 2926 | |
| 2927 | scid = __le16_to_cpu(req->scid); |
| 2928 | dcid = __le16_to_cpu(req->dcid); |
| 2929 | |
| 2930 | BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); |
| 2931 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2932 | chan = l2cap_get_chan_by_scid(conn, dcid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2933 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2934 | return 0; |
| 2935 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2936 | sk = chan->sk; |
| 2937 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2938 | rsp.dcid = cpu_to_le16(chan->scid); |
| 2939 | rsp.scid = cpu_to_le16(chan->dcid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2940 | l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); |
| 2941 | |
| 2942 | sk->sk_shutdown = SHUTDOWN_MASK; |
| 2943 | |
Andrei Emeltchenko | a49184c | 2010-11-03 12:32:44 +0200 | [diff] [blame] | 2944 | /* don't delete l2cap channel if sk is owned by user */ |
| 2945 | if (sock_owned_by_user(sk)) { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2946 | l2cap_state_change(chan, BT_DISCONN); |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 2947 | __clear_chan_timer(chan); |
| 2948 | __set_chan_timer(chan, HZ / 5); |
Andrei Emeltchenko | a49184c | 2010-11-03 12:32:44 +0200 | [diff] [blame] | 2949 | bh_unlock_sock(sk); |
| 2950 | return 0; |
| 2951 | } |
| 2952 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2953 | l2cap_chan_del(chan, ECONNRESET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2954 | bh_unlock_sock(sk); |
| 2955 | |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 2956 | chan->ops->close(chan->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2957 | return 0; |
| 2958 | } |
| 2959 | |
| 2960 | static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2961 | { |
| 2962 | struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; |
| 2963 | u16 dcid, scid; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2964 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2965 | struct sock *sk; |
| 2966 | |
| 2967 | scid = __le16_to_cpu(rsp->scid); |
| 2968 | dcid = __le16_to_cpu(rsp->dcid); |
| 2969 | |
| 2970 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); |
| 2971 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2972 | chan = l2cap_get_chan_by_scid(conn, scid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2973 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2974 | return 0; |
| 2975 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2976 | sk = chan->sk; |
| 2977 | |
Andrei Emeltchenko | a49184c | 2010-11-03 12:32:44 +0200 | [diff] [blame] | 2978 | /* don't delete l2cap channel if sk is owned by user */ |
| 2979 | if (sock_owned_by_user(sk)) { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2980 | l2cap_state_change(chan,BT_DISCONN); |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 2981 | __clear_chan_timer(chan); |
| 2982 | __set_chan_timer(chan, HZ / 5); |
Andrei Emeltchenko | a49184c | 2010-11-03 12:32:44 +0200 | [diff] [blame] | 2983 | bh_unlock_sock(sk); |
| 2984 | return 0; |
| 2985 | } |
| 2986 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2987 | l2cap_chan_del(chan, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2988 | bh_unlock_sock(sk); |
| 2989 | |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 2990 | chan->ops->close(chan->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2991 | return 0; |
| 2992 | } |
| 2993 | |
| 2994 | static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2995 | { |
| 2996 | struct l2cap_info_req *req = (struct l2cap_info_req *) data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2997 | u16 type; |
| 2998 | |
| 2999 | type = __le16_to_cpu(req->type); |
| 3000 | |
| 3001 | BT_DBG("type 0x%4.4x", type); |
| 3002 | |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 3003 | if (type == L2CAP_IT_FEAT_MASK) { |
| 3004 | u8 buf[8]; |
Marcel Holtmann | 44dd46d | 2009-05-02 19:09:01 -0700 | [diff] [blame] | 3005 | u32 feat_mask = l2cap_feat_mask; |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 3006 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
| 3007 | rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 3008 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); |
Gustavo F. Padovan | d1c4a17 | 2010-07-18 16:25:54 -0300 | [diff] [blame] | 3009 | if (!disable_ertm) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3010 | feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING |
| 3011 | | L2CAP_FEAT_FCS; |
Andrei Emeltchenko | a5fd6f3 | 2011-09-16 16:26:32 +0300 | [diff] [blame] | 3012 | if (enable_hs) |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 3013 | feat_mask |= L2CAP_FEAT_EXT_FLOW |
| 3014 | | L2CAP_FEAT_EXT_WINDOW; |
Andrei Emeltchenko | a5fd6f3 | 2011-09-16 16:26:32 +0300 | [diff] [blame] | 3015 | |
Gustavo F. Padovan | 1b7bf4e | 2009-08-24 00:45:20 -0300 | [diff] [blame] | 3016 | put_unaligned_le32(feat_mask, rsp->data); |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 3017 | l2cap_send_cmd(conn, cmd->ident, |
| 3018 | L2CAP_INFO_RSP, sizeof(buf), buf); |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 3019 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
| 3020 | u8 buf[12]; |
| 3021 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
| 3022 | rsp->type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); |
| 3023 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); |
Andrei Emeltchenko | c6337ea | 2011-10-20 17:02:44 +0300 | [diff] [blame] | 3024 | memcpy(rsp->data, l2cap_fixed_chan, sizeof(l2cap_fixed_chan)); |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 3025 | l2cap_send_cmd(conn, cmd->ident, |
| 3026 | L2CAP_INFO_RSP, sizeof(buf), buf); |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 3027 | } else { |
| 3028 | struct l2cap_info_rsp rsp; |
| 3029 | rsp.type = cpu_to_le16(type); |
| 3030 | rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP); |
| 3031 | l2cap_send_cmd(conn, cmd->ident, |
| 3032 | L2CAP_INFO_RSP, sizeof(rsp), &rsp); |
| 3033 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3034 | |
| 3035 | return 0; |
| 3036 | } |
| 3037 | |
| 3038 | static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3039 | { |
| 3040 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; |
| 3041 | u16 type, result; |
| 3042 | |
| 3043 | type = __le16_to_cpu(rsp->type); |
| 3044 | result = __le16_to_cpu(rsp->result); |
| 3045 | |
| 3046 | BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); |
| 3047 | |
Andrei Emeltchenko | e90165b | 2011-03-25 11:31:41 +0200 | [diff] [blame] | 3048 | /* L2CAP Info req/rsp are unbound to channels, add extra checks */ |
| 3049 | if (cmd->ident != conn->info_ident || |
| 3050 | conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) |
| 3051 | return 0; |
| 3052 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 3053 | del_timer(&conn->info_timer); |
| 3054 | |
Ville Tervo | adb08ed | 2010-08-04 09:43:33 +0300 | [diff] [blame] | 3055 | if (result != L2CAP_IR_SUCCESS) { |
| 3056 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
| 3057 | conn->info_ident = 0; |
| 3058 | |
| 3059 | l2cap_conn_start(conn); |
| 3060 | |
| 3061 | return 0; |
| 3062 | } |
| 3063 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 3064 | if (type == L2CAP_IT_FEAT_MASK) { |
Harvey Harrison | 8398531 | 2008-05-02 16:25:46 -0700 | [diff] [blame] | 3065 | conn->feat_mask = get_unaligned_le32(rsp->data); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 3066 | |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 3067 | if (conn->feat_mask & L2CAP_FEAT_FIXED_CHAN) { |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 3068 | struct l2cap_info_req req; |
| 3069 | req.type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); |
| 3070 | |
| 3071 | conn->info_ident = l2cap_get_ident(conn); |
| 3072 | |
| 3073 | l2cap_send_cmd(conn, conn->info_ident, |
| 3074 | L2CAP_INFO_REQ, sizeof(req), &req); |
| 3075 | } else { |
| 3076 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
| 3077 | conn->info_ident = 0; |
| 3078 | |
| 3079 | l2cap_conn_start(conn); |
| 3080 | } |
| 3081 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 3082 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 3083 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 3084 | |
| 3085 | l2cap_conn_start(conn); |
| 3086 | } |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 3087 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3088 | return 0; |
| 3089 | } |
| 3090 | |
Gustavo F. Padovan | e2174ca | 2011-02-17 19:16:55 -0300 | [diff] [blame] | 3091 | 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] | 3092 | u16 to_multiplier) |
| 3093 | { |
| 3094 | u16 max_latency; |
| 3095 | |
| 3096 | if (min > max || min < 6 || max > 3200) |
| 3097 | return -EINVAL; |
| 3098 | |
| 3099 | if (to_multiplier < 10 || to_multiplier > 3200) |
| 3100 | return -EINVAL; |
| 3101 | |
| 3102 | if (max >= to_multiplier * 8) |
| 3103 | return -EINVAL; |
| 3104 | |
| 3105 | max_latency = (to_multiplier * 8 / max) - 1; |
| 3106 | if (latency > 499 || latency > max_latency) |
| 3107 | return -EINVAL; |
| 3108 | |
| 3109 | return 0; |
| 3110 | } |
| 3111 | |
| 3112 | static inline int l2cap_conn_param_update_req(struct l2cap_conn *conn, |
| 3113 | struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3114 | { |
| 3115 | struct hci_conn *hcon = conn->hcon; |
| 3116 | struct l2cap_conn_param_update_req *req; |
| 3117 | struct l2cap_conn_param_update_rsp rsp; |
| 3118 | u16 min, max, latency, to_multiplier, cmd_len; |
Claudio Takahasi | 2ce603e | 2011-02-16 20:44:53 -0200 | [diff] [blame] | 3119 | int err; |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 3120 | |
| 3121 | if (!(hcon->link_mode & HCI_LM_MASTER)) |
| 3122 | return -EINVAL; |
| 3123 | |
| 3124 | cmd_len = __le16_to_cpu(cmd->len); |
| 3125 | if (cmd_len != sizeof(struct l2cap_conn_param_update_req)) |
| 3126 | return -EPROTO; |
| 3127 | |
| 3128 | req = (struct l2cap_conn_param_update_req *) data; |
Gustavo F. Padovan | e2174ca | 2011-02-17 19:16:55 -0300 | [diff] [blame] | 3129 | min = __le16_to_cpu(req->min); |
| 3130 | max = __le16_to_cpu(req->max); |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 3131 | latency = __le16_to_cpu(req->latency); |
| 3132 | to_multiplier = __le16_to_cpu(req->to_multiplier); |
| 3133 | |
| 3134 | BT_DBG("min 0x%4.4x max 0x%4.4x latency: 0x%4.4x Timeout: 0x%4.4x", |
| 3135 | min, max, latency, to_multiplier); |
| 3136 | |
| 3137 | memset(&rsp, 0, sizeof(rsp)); |
Claudio Takahasi | 2ce603e | 2011-02-16 20:44:53 -0200 | [diff] [blame] | 3138 | |
| 3139 | err = l2cap_check_conn_param(min, max, latency, to_multiplier); |
| 3140 | if (err) |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 3141 | rsp.result = cpu_to_le16(L2CAP_CONN_PARAM_REJECTED); |
| 3142 | else |
| 3143 | rsp.result = cpu_to_le16(L2CAP_CONN_PARAM_ACCEPTED); |
| 3144 | |
| 3145 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_PARAM_UPDATE_RSP, |
| 3146 | sizeof(rsp), &rsp); |
| 3147 | |
Claudio Takahasi | 2ce603e | 2011-02-16 20:44:53 -0200 | [diff] [blame] | 3148 | if (!err) |
| 3149 | hci_le_conn_update(hcon, min, max, latency, to_multiplier); |
| 3150 | |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 3151 | return 0; |
| 3152 | } |
| 3153 | |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 3154 | static inline int l2cap_bredr_sig_cmd(struct l2cap_conn *conn, |
| 3155 | struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data) |
| 3156 | { |
| 3157 | int err = 0; |
| 3158 | |
| 3159 | switch (cmd->code) { |
| 3160 | case L2CAP_COMMAND_REJ: |
| 3161 | l2cap_command_rej(conn, cmd, data); |
| 3162 | break; |
| 3163 | |
| 3164 | case L2CAP_CONN_REQ: |
| 3165 | err = l2cap_connect_req(conn, cmd, data); |
| 3166 | break; |
| 3167 | |
| 3168 | case L2CAP_CONN_RSP: |
| 3169 | err = l2cap_connect_rsp(conn, cmd, data); |
| 3170 | break; |
| 3171 | |
| 3172 | case L2CAP_CONF_REQ: |
| 3173 | err = l2cap_config_req(conn, cmd, cmd_len, data); |
| 3174 | break; |
| 3175 | |
| 3176 | case L2CAP_CONF_RSP: |
| 3177 | err = l2cap_config_rsp(conn, cmd, data); |
| 3178 | break; |
| 3179 | |
| 3180 | case L2CAP_DISCONN_REQ: |
| 3181 | err = l2cap_disconnect_req(conn, cmd, data); |
| 3182 | break; |
| 3183 | |
| 3184 | case L2CAP_DISCONN_RSP: |
| 3185 | err = l2cap_disconnect_rsp(conn, cmd, data); |
| 3186 | break; |
| 3187 | |
| 3188 | case L2CAP_ECHO_REQ: |
| 3189 | l2cap_send_cmd(conn, cmd->ident, L2CAP_ECHO_RSP, cmd_len, data); |
| 3190 | break; |
| 3191 | |
| 3192 | case L2CAP_ECHO_RSP: |
| 3193 | break; |
| 3194 | |
| 3195 | case L2CAP_INFO_REQ: |
| 3196 | err = l2cap_information_req(conn, cmd, data); |
| 3197 | break; |
| 3198 | |
| 3199 | case L2CAP_INFO_RSP: |
| 3200 | err = l2cap_information_rsp(conn, cmd, data); |
| 3201 | break; |
| 3202 | |
| 3203 | default: |
| 3204 | BT_ERR("Unknown BR/EDR signaling command 0x%2.2x", cmd->code); |
| 3205 | err = -EINVAL; |
| 3206 | break; |
| 3207 | } |
| 3208 | |
| 3209 | return err; |
| 3210 | } |
| 3211 | |
| 3212 | static inline int l2cap_le_sig_cmd(struct l2cap_conn *conn, |
| 3213 | struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3214 | { |
| 3215 | switch (cmd->code) { |
| 3216 | case L2CAP_COMMAND_REJ: |
| 3217 | return 0; |
| 3218 | |
| 3219 | case L2CAP_CONN_PARAM_UPDATE_REQ: |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 3220 | return l2cap_conn_param_update_req(conn, cmd, data); |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 3221 | |
| 3222 | case L2CAP_CONN_PARAM_UPDATE_RSP: |
| 3223 | return 0; |
| 3224 | |
| 3225 | default: |
| 3226 | BT_ERR("Unknown LE signaling command 0x%2.2x", cmd->code); |
| 3227 | return -EINVAL; |
| 3228 | } |
| 3229 | } |
| 3230 | |
| 3231 | static inline void l2cap_sig_channel(struct l2cap_conn *conn, |
| 3232 | struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3233 | { |
| 3234 | u8 *data = skb->data; |
| 3235 | int len = skb->len; |
| 3236 | struct l2cap_cmd_hdr cmd; |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 3237 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3238 | |
| 3239 | l2cap_raw_recv(conn, skb); |
| 3240 | |
| 3241 | while (len >= L2CAP_CMD_HDR_SIZE) { |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3242 | u16 cmd_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3243 | memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); |
| 3244 | data += L2CAP_CMD_HDR_SIZE; |
| 3245 | len -= L2CAP_CMD_HDR_SIZE; |
| 3246 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3247 | cmd_len = le16_to_cpu(cmd.len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3248 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3249 | 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] | 3250 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3251 | if (cmd_len > len || !cmd.ident) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3252 | BT_DBG("corrupted command"); |
| 3253 | break; |
| 3254 | } |
| 3255 | |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 3256 | if (conn->hcon->type == LE_LINK) |
| 3257 | err = l2cap_le_sig_cmd(conn, &cmd, data); |
| 3258 | else |
| 3259 | err = l2cap_bredr_sig_cmd(conn, &cmd, cmd_len, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3260 | |
| 3261 | if (err) { |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 3262 | struct l2cap_cmd_rej_unk rej; |
Gustavo F. Padovan | 2c6d1a2 | 2011-03-23 14:38:32 -0300 | [diff] [blame] | 3263 | |
| 3264 | BT_ERR("Wrong link type (%d)", err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3265 | |
| 3266 | /* FIXME: Map err to a valid reason */ |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 3267 | rej.reason = cpu_to_le16(L2CAP_REJ_NOT_UNDERSTOOD); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3268 | l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); |
| 3269 | } |
| 3270 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3271 | data += cmd_len; |
| 3272 | len -= cmd_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3273 | } |
| 3274 | |
| 3275 | kfree_skb(skb); |
| 3276 | } |
| 3277 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3278 | 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] | 3279 | { |
| 3280 | u16 our_fcs, rcv_fcs; |
Andrei Emeltchenko | e4ca6d9 | 2011-10-11 13:37:52 +0300 | [diff] [blame] | 3281 | int hdr_size; |
| 3282 | |
| 3283 | if (test_bit(FLAG_EXT_CTRL, &chan->flags)) |
| 3284 | hdr_size = L2CAP_EXT_HDR_SIZE; |
| 3285 | else |
| 3286 | hdr_size = L2CAP_ENH_HDR_SIZE; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3287 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3288 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 3289 | skb_trim(skb, skb->len - L2CAP_FCS_SIZE); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3290 | rcv_fcs = get_unaligned_le16(skb->data + skb->len); |
| 3291 | our_fcs = crc16(0, skb->data - hdr_size, skb->len + hdr_size); |
| 3292 | |
| 3293 | if (our_fcs != rcv_fcs) |
João Paulo Rechi Vita | 7a560e5 | 2010-06-22 13:56:27 -0300 | [diff] [blame] | 3294 | return -EBADMSG; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3295 | } |
| 3296 | return 0; |
| 3297 | } |
| 3298 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3299 | 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] | 3300 | { |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 3301 | u32 control = 0; |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3302 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3303 | chan->frames_sent = 0; |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3304 | |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 3305 | control |= __set_reqseq(chan, chan->buffer_seq); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3306 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3307 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 3308 | control |= __set_ctrl_super(chan, L2CAP_SUPER_RNR); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3309 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3310 | set_bit(CONN_RNR_SENT, &chan->conn_state); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3311 | } |
| 3312 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3313 | if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3314 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3315 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3316 | l2cap_ertm_send(chan); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3317 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3318 | if (!test_bit(CONN_LOCAL_BUSY, &chan->conn_state) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3319 | chan->frames_sent == 0) { |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 3320 | control |= __set_ctrl_super(chan, L2CAP_SUPER_RR); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3321 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3322 | } |
| 3323 | } |
| 3324 | |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 3325 | 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] | 3326 | { |
| 3327 | struct sk_buff *next_skb; |
João Paulo Rechi Vita | bfbacc1 | 2010-05-31 18:35:44 -0300 | [diff] [blame] | 3328 | int tx_seq_offset, next_tx_seq_offset; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3329 | |
| 3330 | bt_cb(skb)->tx_seq = tx_seq; |
| 3331 | bt_cb(skb)->sar = sar; |
| 3332 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3333 | next_skb = skb_peek(&chan->srej_q); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3334 | if (!next_skb) { |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3335 | __skb_queue_tail(&chan->srej_q, skb); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3336 | return 0; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3337 | } |
| 3338 | |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 3339 | 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] | 3340 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3341 | do { |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3342 | if (bt_cb(next_skb)->tx_seq == tx_seq) |
| 3343 | return -EINVAL; |
| 3344 | |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 3345 | next_tx_seq_offset = __seq_offset(chan, |
| 3346 | bt_cb(next_skb)->tx_seq, chan->buffer_seq); |
João Paulo Rechi Vita | bfbacc1 | 2010-05-31 18:35:44 -0300 | [diff] [blame] | 3347 | |
| 3348 | if (next_tx_seq_offset > tx_seq_offset) { |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3349 | __skb_queue_before(&chan->srej_q, next_skb, skb); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3350 | return 0; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3351 | } |
| 3352 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3353 | if (skb_queue_is_last(&chan->srej_q, next_skb)) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3354 | break; |
| 3355 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3356 | } while ((next_skb = skb_queue_next(&chan->srej_q, next_skb))); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3357 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3358 | __skb_queue_tail(&chan->srej_q, skb); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3359 | |
| 3360 | return 0; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3361 | } |
| 3362 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3363 | static void append_skb_frag(struct sk_buff *skb, |
| 3364 | struct sk_buff *new_frag, struct sk_buff **last_frag) |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3365 | { |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3366 | /* skb->len reflects data in skb as well as all fragments |
| 3367 | * skb->data_len reflects only data in fragments |
| 3368 | */ |
| 3369 | if (!skb_has_frag_list(skb)) |
| 3370 | skb_shinfo(skb)->frag_list = new_frag; |
| 3371 | |
| 3372 | new_frag->next = NULL; |
| 3373 | |
| 3374 | (*last_frag)->next = new_frag; |
| 3375 | *last_frag = new_frag; |
| 3376 | |
| 3377 | skb->len += new_frag->len; |
| 3378 | skb->data_len += new_frag->len; |
| 3379 | skb->truesize += new_frag->truesize; |
| 3380 | } |
| 3381 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 3382 | 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] | 3383 | { |
| 3384 | int err = -EINVAL; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3385 | |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 3386 | switch (__get_ctrl_sar(chan, control)) { |
| 3387 | case L2CAP_SAR_UNSEGMENTED: |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3388 | if (chan->sdu) |
| 3389 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3390 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3391 | err = chan->ops->recv(chan->data, skb); |
| 3392 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3393 | |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 3394 | case L2CAP_SAR_START: |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3395 | if (chan->sdu) |
| 3396 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3397 | |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3398 | chan->sdu_len = get_unaligned_le16(skb->data); |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 3399 | skb_pull(skb, L2CAP_SDULEN_SIZE); |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3400 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3401 | if (chan->sdu_len > chan->imtu) { |
| 3402 | err = -EMSGSIZE; |
| 3403 | break; |
| 3404 | } |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3405 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3406 | if (skb->len >= chan->sdu_len) |
| 3407 | break; |
| 3408 | |
| 3409 | chan->sdu = skb; |
| 3410 | chan->sdu_last_frag = skb; |
| 3411 | |
| 3412 | skb = NULL; |
| 3413 | err = 0; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3414 | break; |
| 3415 | |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 3416 | case L2CAP_SAR_CONTINUE: |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3417 | if (!chan->sdu) |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3418 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3419 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3420 | append_skb_frag(chan->sdu, skb, |
| 3421 | &chan->sdu_last_frag); |
| 3422 | skb = NULL; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3423 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3424 | if (chan->sdu->len >= chan->sdu_len) |
| 3425 | break; |
Gustavo F. Padovan | 4178ba4 | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 3426 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3427 | err = 0; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3428 | break; |
| 3429 | |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 3430 | case L2CAP_SAR_END: |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3431 | if (!chan->sdu) |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3432 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3433 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3434 | append_skb_frag(chan->sdu, skb, |
| 3435 | &chan->sdu_last_frag); |
| 3436 | skb = NULL; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3437 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3438 | if (chan->sdu->len != chan->sdu_len) |
| 3439 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3440 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3441 | err = chan->ops->recv(chan->data, chan->sdu); |
Gustavo F. Padovan | 4178ba4 | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 3442 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3443 | if (!err) { |
| 3444 | /* Reassembly complete */ |
| 3445 | chan->sdu = NULL; |
| 3446 | chan->sdu_last_frag = NULL; |
| 3447 | chan->sdu_len = 0; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3448 | } |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3449 | break; |
| 3450 | } |
| 3451 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3452 | if (err) { |
| 3453 | kfree_skb(skb); |
| 3454 | kfree_skb(chan->sdu); |
| 3455 | chan->sdu = NULL; |
| 3456 | chan->sdu_last_frag = NULL; |
| 3457 | chan->sdu_len = 0; |
| 3458 | } |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3459 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3460 | return err; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3461 | } |
| 3462 | |
Mat Martineau | 26f880d | 2011-07-07 09:39:01 -0700 | [diff] [blame] | 3463 | static void l2cap_ertm_enter_local_busy(struct l2cap_chan *chan) |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3464 | { |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 3465 | u32 control; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3466 | |
Mat Martineau | 26f880d | 2011-07-07 09:39:01 -0700 | [diff] [blame] | 3467 | BT_DBG("chan %p, Enter local busy", chan); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3468 | |
Mat Martineau | 26f880d | 2011-07-07 09:39:01 -0700 | [diff] [blame] | 3469 | set_bit(CONN_LOCAL_BUSY, &chan->conn_state); |
| 3470 | |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 3471 | control = __set_reqseq(chan, chan->buffer_seq); |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 3472 | control |= __set_ctrl_super(chan, L2CAP_SUPER_RNR); |
Mat Martineau | 26f880d | 2011-07-07 09:39:01 -0700 | [diff] [blame] | 3473 | l2cap_send_sframe(chan, control); |
| 3474 | |
| 3475 | set_bit(CONN_RNR_SENT, &chan->conn_state); |
| 3476 | |
| 3477 | __clear_ack_timer(chan); |
| 3478 | } |
| 3479 | |
| 3480 | static void l2cap_ertm_exit_local_busy(struct l2cap_chan *chan) |
| 3481 | { |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 3482 | u32 control; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3483 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3484 | if (!test_bit(CONN_RNR_SENT, &chan->conn_state)) |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3485 | goto done; |
| 3486 | |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 3487 | control = __set_reqseq(chan, chan->buffer_seq); |
Andrei Emeltchenko | e378173 | 2011-10-11 13:37:50 +0300 | [diff] [blame] | 3488 | control |= __set_ctrl_poll(chan); |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 3489 | control |= __set_ctrl_super(chan, L2CAP_SUPER_RR); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3490 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3491 | chan->retry_count = 1; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3492 | |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3493 | __clear_retrans_timer(chan); |
| 3494 | __set_monitor_timer(chan); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3495 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3496 | set_bit(CONN_WAIT_F, &chan->conn_state); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3497 | |
| 3498 | done: |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3499 | clear_bit(CONN_LOCAL_BUSY, &chan->conn_state); |
| 3500 | clear_bit(CONN_RNR_SENT, &chan->conn_state); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3501 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 3502 | BT_DBG("chan %p, Exit local busy", chan); |
Gustavo F. Padovan | 712132e | 2010-06-21 19:39:50 -0300 | [diff] [blame] | 3503 | } |
| 3504 | |
Mat Martineau | e328140 | 2011-07-07 09:39:02 -0700 | [diff] [blame] | 3505 | void l2cap_chan_busy(struct l2cap_chan *chan, int busy) |
Gustavo F. Padovan | 712132e | 2010-06-21 19:39:50 -0300 | [diff] [blame] | 3506 | { |
Mat Martineau | e328140 | 2011-07-07 09:39:02 -0700 | [diff] [blame] | 3507 | if (chan->mode == L2CAP_MODE_ERTM) { |
| 3508 | if (busy) |
| 3509 | l2cap_ertm_enter_local_busy(chan); |
| 3510 | else |
| 3511 | l2cap_ertm_exit_local_busy(chan); |
Gustavo F. Padovan | 712132e | 2010-06-21 19:39:50 -0300 | [diff] [blame] | 3512 | } |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3513 | } |
| 3514 | |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 3515 | 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] | 3516 | { |
| 3517 | struct sk_buff *skb; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 3518 | u32 control; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3519 | |
Mat Martineau | e328140 | 2011-07-07 09:39:02 -0700 | [diff] [blame] | 3520 | while ((skb = skb_peek(&chan->srej_q)) && |
| 3521 | !test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
| 3522 | int err; |
| 3523 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3524 | if (bt_cb(skb)->tx_seq != tx_seq) |
| 3525 | break; |
| 3526 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3527 | skb = skb_dequeue(&chan->srej_q); |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 3528 | control = __set_ctrl_sar(chan, bt_cb(skb)->sar); |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3529 | err = l2cap_reassemble_sdu(chan, skb, control); |
Mat Martineau | e328140 | 2011-07-07 09:39:02 -0700 | [diff] [blame] | 3530 | |
| 3531 | if (err < 0) { |
| 3532 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
| 3533 | break; |
| 3534 | } |
| 3535 | |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 3536 | chan->buffer_seq_srej = __next_seq(chan, chan->buffer_seq_srej); |
| 3537 | tx_seq = __next_seq(chan, tx_seq); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3538 | } |
| 3539 | } |
| 3540 | |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 3541 | 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] | 3542 | { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3543 | struct srej_list *l, *tmp; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 3544 | u32 control; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3545 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 3546 | list_for_each_entry_safe(l, tmp, &chan->srej_l, list) { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3547 | if (l->tx_seq == tx_seq) { |
| 3548 | list_del(&l->list); |
| 3549 | kfree(l); |
| 3550 | return; |
| 3551 | } |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 3552 | control = __set_ctrl_super(chan, L2CAP_SUPER_SREJ); |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 3553 | control |= __set_reqseq(chan, l->tx_seq); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3554 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3555 | list_del(&l->list); |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 3556 | list_add_tail(&l->list, &chan->srej_l); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3557 | } |
| 3558 | } |
| 3559 | |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 3560 | static void l2cap_send_srejframe(struct l2cap_chan *chan, u16 tx_seq) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3561 | { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3562 | struct srej_list *new; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 3563 | u32 control; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3564 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3565 | while (tx_seq != chan->expected_tx_seq) { |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 3566 | control = __set_ctrl_super(chan, L2CAP_SUPER_SREJ); |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 3567 | control |= __set_reqseq(chan, chan->expected_tx_seq); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3568 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3569 | |
| 3570 | new = kzalloc(sizeof(struct srej_list), GFP_ATOMIC); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3571 | new->tx_seq = chan->expected_tx_seq; |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 3572 | |
| 3573 | chan->expected_tx_seq = __next_seq(chan, chan->expected_tx_seq); |
| 3574 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 3575 | list_add_tail(&new->list, &chan->srej_l); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3576 | } |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 3577 | |
| 3578 | chan->expected_tx_seq = __next_seq(chan, chan->expected_tx_seq); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3579 | } |
| 3580 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 3581 | 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] | 3582 | { |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 3583 | u16 tx_seq = __get_txseq(chan, rx_control); |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 3584 | u16 req_seq = __get_reqseq(chan, rx_control); |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 3585 | u8 sar = __get_ctrl_sar(chan, rx_control); |
Gustavo F. Padovan | f6337c7 | 2010-05-10 18:32:04 -0300 | [diff] [blame] | 3586 | int tx_seq_offset, expected_tx_seq_offset; |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3587 | int num_to_ack = (chan->tx_win/6) + 1; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3588 | int err = 0; |
| 3589 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 3590 | 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] | 3591 | tx_seq, rx_control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3592 | |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 3593 | if (__is_ctrl_final(chan, rx_control) && |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3594 | test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3595 | __clear_monitor_timer(chan); |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3596 | if (chan->unacked_frames > 0) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3597 | __set_retrans_timer(chan); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3598 | clear_bit(CONN_WAIT_F, &chan->conn_state); |
Gustavo F. Padovan | 1d8f5d1 | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3599 | } |
| 3600 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3601 | chan->expected_ack_seq = req_seq; |
| 3602 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | 9f121a5 | 2009-10-03 02:34:38 -0300 | [diff] [blame] | 3603 | |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 3604 | 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] | 3605 | |
| 3606 | /* invalid tx_seq */ |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3607 | if (tx_seq_offset >= chan->tx_win) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 3608 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3609 | goto drop; |
| 3610 | } |
| 3611 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3612 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3613 | goto drop; |
| 3614 | |
Mat Martineau | 02f1b64 | 2011-06-29 14:35:19 -0700 | [diff] [blame] | 3615 | if (tx_seq == chan->expected_tx_seq) |
| 3616 | goto expected; |
| 3617 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3618 | if (test_bit(CONN_SREJ_SENT, &chan->conn_state)) { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3619 | struct srej_list *first; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3620 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 3621 | first = list_first_entry(&chan->srej_l, |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3622 | struct srej_list, list); |
| 3623 | if (tx_seq == first->tx_seq) { |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3624 | l2cap_add_to_srej_queue(chan, skb, tx_seq, sar); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3625 | l2cap_check_srej_gap(chan, tx_seq); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3626 | |
| 3627 | list_del(&first->list); |
| 3628 | kfree(first); |
| 3629 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 3630 | if (list_empty(&chan->srej_l)) { |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3631 | chan->buffer_seq = chan->buffer_seq_srej; |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3632 | clear_bit(CONN_SREJ_SENT, &chan->conn_state); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3633 | l2cap_send_ack(chan); |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 3634 | BT_DBG("chan %p, Exit SREJ_SENT", chan); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3635 | } |
| 3636 | } else { |
| 3637 | struct srej_list *l; |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3638 | |
| 3639 | /* duplicated tx_seq */ |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3640 | 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] | 3641 | goto drop; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3642 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 3643 | list_for_each_entry(l, &chan->srej_l, list) { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3644 | if (l->tx_seq == tx_seq) { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3645 | l2cap_resend_srejframe(chan, tx_seq); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3646 | return 0; |
| 3647 | } |
| 3648 | } |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3649 | l2cap_send_srejframe(chan, tx_seq); |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3650 | } |
| 3651 | } else { |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 3652 | expected_tx_seq_offset = __seq_offset(chan, |
| 3653 | chan->expected_tx_seq, chan->buffer_seq); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3654 | |
| 3655 | /* duplicated tx_seq */ |
| 3656 | if (tx_seq_offset < expected_tx_seq_offset) |
| 3657 | goto drop; |
| 3658 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3659 | set_bit(CONN_SREJ_SENT, &chan->conn_state); |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3660 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 3661 | BT_DBG("chan %p, Enter SREJ", chan); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 3662 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 3663 | INIT_LIST_HEAD(&chan->srej_l); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3664 | chan->buffer_seq_srej = chan->buffer_seq; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3665 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3666 | __skb_queue_head_init(&chan->srej_q); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3667 | l2cap_add_to_srej_queue(chan, skb, tx_seq, sar); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3668 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3669 | set_bit(CONN_SEND_PBIT, &chan->conn_state); |
Gustavo F. Padovan | ef54fd9 | 2009-08-20 22:26:04 -0300 | [diff] [blame] | 3670 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3671 | l2cap_send_srejframe(chan, tx_seq); |
Gustavo F. Padovan | 7fe9b29 | 2010-05-12 18:32:04 -0300 | [diff] [blame] | 3672 | |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3673 | __clear_ack_timer(chan); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3674 | } |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3675 | return 0; |
| 3676 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3677 | expected: |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 3678 | chan->expected_tx_seq = __next_seq(chan, chan->expected_tx_seq); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3679 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3680 | if (test_bit(CONN_SREJ_SENT, &chan->conn_state)) { |
Gustavo F. Padovan | 3b1a9f3 | 2010-05-01 16:15:42 -0300 | [diff] [blame] | 3681 | bt_cb(skb)->tx_seq = tx_seq; |
| 3682 | bt_cb(skb)->sar = sar; |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3683 | __skb_queue_tail(&chan->srej_q, skb); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3684 | return 0; |
| 3685 | } |
| 3686 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3687 | err = l2cap_reassemble_sdu(chan, skb, rx_control); |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 3688 | chan->buffer_seq = __next_seq(chan, chan->buffer_seq); |
| 3689 | |
Mat Martineau | e328140 | 2011-07-07 09:39:02 -0700 | [diff] [blame] | 3690 | if (err < 0) { |
| 3691 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
| 3692 | return err; |
| 3693 | } |
Gustavo F. Padovan | 2ece368 | 2010-06-16 17:21:44 -0300 | [diff] [blame] | 3694 | |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 3695 | if (__is_ctrl_final(chan, rx_control)) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3696 | if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3697 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | 4ec10d9 | 2009-10-03 02:34:39 -0300 | [diff] [blame] | 3698 | } |
| 3699 | |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3700 | __set_ack_timer(chan); |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3701 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3702 | chan->num_acked = (chan->num_acked + 1) % num_to_ack; |
| 3703 | if (chan->num_acked == num_to_ack - 1) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3704 | l2cap_send_ack(chan); |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3705 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3706 | return 0; |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3707 | |
| 3708 | drop: |
| 3709 | kfree_skb(skb); |
| 3710 | return 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3711 | } |
| 3712 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 3713 | 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] | 3714 | { |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 3715 | BT_DBG("chan %p, req_seq %d ctrl 0x%8.8x", chan, |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 3716 | __get_reqseq(chan, rx_control), rx_control); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 3717 | |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 3718 | chan->expected_ack_seq = __get_reqseq(chan, rx_control); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3719 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3720 | |
Andrei Emeltchenko | e378173 | 2011-10-11 13:37:50 +0300 | [diff] [blame] | 3721 | if (__is_ctrl_poll(chan, rx_control)) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3722 | set_bit(CONN_SEND_FBIT, &chan->conn_state); |
| 3723 | if (test_bit(CONN_SREJ_SENT, &chan->conn_state)) { |
| 3724 | if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3725 | (chan->unacked_frames > 0)) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3726 | __set_retrans_timer(chan); |
Gustavo F. Padovan | 05fbd89 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3727 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3728 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3729 | l2cap_send_srejtail(chan); |
Gustavo F. Padovan | 05fbd89 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3730 | } else { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3731 | l2cap_send_i_or_rr_or_rnr(chan); |
Gustavo F. Padovan | 05fbd89 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3732 | } |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3733 | |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 3734 | } else if (__is_ctrl_final(chan, rx_control)) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3735 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3736 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3737 | if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3738 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3739 | |
| 3740 | } else { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3741 | if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3742 | (chan->unacked_frames > 0)) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3743 | __set_retrans_timer(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3744 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3745 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
| 3746 | if (test_bit(CONN_SREJ_SENT, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3747 | l2cap_send_ack(chan); |
Andrei Emeltchenko | 894718a | 2010-12-01 16:58:24 +0200 | [diff] [blame] | 3748 | else |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3749 | l2cap_ertm_send(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3750 | } |
| 3751 | } |
| 3752 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 3753 | 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] | 3754 | { |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 3755 | u16 tx_seq = __get_reqseq(chan, rx_control); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3756 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 3757 | 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] | 3758 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3759 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3760 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3761 | chan->expected_ack_seq = tx_seq; |
| 3762 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3763 | |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 3764 | if (__is_ctrl_final(chan, rx_control)) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3765 | if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3766 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3767 | } else { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3768 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3769 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3770 | if (test_bit(CONN_WAIT_F, &chan->conn_state)) |
| 3771 | set_bit(CONN_REJ_ACT, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3772 | } |
| 3773 | } |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 3774 | 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] | 3775 | { |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 3776 | u16 tx_seq = __get_reqseq(chan, rx_control); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3777 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 3778 | 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] | 3779 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3780 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3781 | |
Andrei Emeltchenko | e378173 | 2011-10-11 13:37:50 +0300 | [diff] [blame] | 3782 | if (__is_ctrl_poll(chan, rx_control)) { |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3783 | chan->expected_ack_seq = tx_seq; |
| 3784 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 3785 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3786 | set_bit(CONN_SEND_FBIT, &chan->conn_state); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3787 | l2cap_retransmit_one_frame(chan, tx_seq); |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 3788 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3789 | l2cap_ertm_send(chan); |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 3790 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3791 | if (test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3792 | chan->srej_save_reqseq = tx_seq; |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3793 | set_bit(CONN_SREJ_ACT, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3794 | } |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 3795 | } else if (__is_ctrl_final(chan, rx_control)) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3796 | if (test_bit(CONN_SREJ_ACT, &chan->conn_state) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3797 | chan->srej_save_reqseq == tx_seq) |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3798 | clear_bit(CONN_SREJ_ACT, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3799 | else |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3800 | l2cap_retransmit_one_frame(chan, tx_seq); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3801 | } else { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3802 | l2cap_retransmit_one_frame(chan, tx_seq); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3803 | if (test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3804 | chan->srej_save_reqseq = tx_seq; |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3805 | set_bit(CONN_SREJ_ACT, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3806 | } |
| 3807 | } |
| 3808 | } |
| 3809 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 3810 | 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] | 3811 | { |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 3812 | u16 tx_seq = __get_reqseq(chan, rx_control); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3813 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 3814 | 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] | 3815 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3816 | set_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3817 | chan->expected_ack_seq = tx_seq; |
| 3818 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3819 | |
Andrei Emeltchenko | e378173 | 2011-10-11 13:37:50 +0300 | [diff] [blame] | 3820 | if (__is_ctrl_poll(chan, rx_control)) |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3821 | set_bit(CONN_SEND_FBIT, &chan->conn_state); |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 3822 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3823 | if (!test_bit(CONN_SREJ_SENT, &chan->conn_state)) { |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3824 | __clear_retrans_timer(chan); |
Andrei Emeltchenko | e378173 | 2011-10-11 13:37:50 +0300 | [diff] [blame] | 3825 | if (__is_ctrl_poll(chan, rx_control)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3826 | l2cap_send_rr_or_rnr(chan, L2CAP_CTRL_FINAL); |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3827 | return; |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3828 | } |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3829 | |
Andrei Emeltchenko | e378173 | 2011-10-11 13:37:50 +0300 | [diff] [blame] | 3830 | if (__is_ctrl_poll(chan, rx_control)) { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3831 | l2cap_send_srejtail(chan); |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 3832 | } else { |
| 3833 | rx_control = __set_ctrl_super(chan, L2CAP_SUPER_RR); |
| 3834 | l2cap_send_sframe(chan, rx_control); |
| 3835 | } |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3836 | } |
| 3837 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 3838 | 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] | 3839 | { |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 3840 | 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] | 3841 | |
Andrei Emeltchenko | 03f6715 | 2011-10-11 13:37:49 +0300 | [diff] [blame] | 3842 | if (__is_ctrl_final(chan, rx_control) && |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3843 | test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3844 | __clear_monitor_timer(chan); |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3845 | if (chan->unacked_frames > 0) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3846 | __set_retrans_timer(chan); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3847 | clear_bit(CONN_WAIT_F, &chan->conn_state); |
Gustavo F. Padovan | 1d8f5d1 | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3848 | } |
| 3849 | |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 3850 | switch (__get_ctrl_super(chan, rx_control)) { |
| 3851 | case L2CAP_SUPER_RR: |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3852 | l2cap_data_channel_rrframe(chan, rx_control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3853 | break; |
| 3854 | |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 3855 | case L2CAP_SUPER_REJ: |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3856 | l2cap_data_channel_rejframe(chan, rx_control); |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3857 | break; |
| 3858 | |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 3859 | case L2CAP_SUPER_SREJ: |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3860 | l2cap_data_channel_srejframe(chan, rx_control); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3861 | break; |
| 3862 | |
Andrei Emeltchenko | ab784b7 | 2011-10-11 13:37:44 +0300 | [diff] [blame] | 3863 | case L2CAP_SUPER_RNR: |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3864 | l2cap_data_channel_rnrframe(chan, rx_control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3865 | break; |
| 3866 | } |
| 3867 | |
Gustavo F. Padovan | faaebd1 | 2010-05-01 16:15:35 -0300 | [diff] [blame] | 3868 | kfree_skb(skb); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3869 | return 0; |
| 3870 | } |
| 3871 | |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3872 | static int l2cap_ertm_data_rcv(struct sock *sk, struct sk_buff *skb) |
| 3873 | { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3874 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 3875 | u32 control; |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 3876 | u16 req_seq; |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3877 | int len, next_tx_seq_offset, req_seq_offset; |
| 3878 | |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 3879 | control = __get_control(chan, skb->data); |
| 3880 | skb_pull(skb, __ctrl_size(chan)); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3881 | len = skb->len; |
| 3882 | |
| 3883 | /* |
| 3884 | * We can just drop the corrupted I-frame here. |
| 3885 | * Receiver will miss it and start proper recovery |
| 3886 | * procedures and ask retransmission. |
| 3887 | */ |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3888 | if (l2cap_check_fcs(chan, skb)) |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3889 | goto drop; |
| 3890 | |
Andrei Emeltchenko | 793c2f1 | 2011-10-11 13:37:48 +0300 | [diff] [blame] | 3891 | if (__is_sar_start(chan, control) && !__is_sframe(chan, control)) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 3892 | len -= L2CAP_SDULEN_SIZE; |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3893 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3894 | if (chan->fcs == L2CAP_FCS_CRC16) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 3895 | len -= L2CAP_FCS_SIZE; |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3896 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3897 | if (len > chan->mps) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 3898 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3899 | goto drop; |
| 3900 | } |
| 3901 | |
Andrei Emeltchenko | 0b209fa | 2011-10-11 13:37:46 +0300 | [diff] [blame] | 3902 | req_seq = __get_reqseq(chan, control); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3903 | |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 3904 | req_seq_offset = __seq_offset(chan, req_seq, chan->expected_ack_seq); |
| 3905 | |
| 3906 | next_tx_seq_offset = __seq_offset(chan, chan->next_tx_seq, |
| 3907 | chan->expected_ack_seq); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3908 | |
| 3909 | /* check for invalid req-seq */ |
| 3910 | if (req_seq_offset > next_tx_seq_offset) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 3911 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3912 | goto drop; |
| 3913 | } |
| 3914 | |
Andrei Emeltchenko | 793c2f1 | 2011-10-11 13:37:48 +0300 | [diff] [blame] | 3915 | if (!__is_sframe(chan, control)) { |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3916 | if (len < 0) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 3917 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3918 | goto drop; |
| 3919 | } |
| 3920 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3921 | l2cap_data_channel_iframe(chan, control, skb); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3922 | } else { |
| 3923 | if (len != 0) { |
| 3924 | BT_ERR("%d", len); |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 3925 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3926 | goto drop; |
| 3927 | } |
| 3928 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3929 | l2cap_data_channel_sframe(chan, control, skb); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3930 | } |
| 3931 | |
| 3932 | return 0; |
| 3933 | |
| 3934 | drop: |
| 3935 | kfree_skb(skb); |
| 3936 | return 0; |
| 3937 | } |
| 3938 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3939 | static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) |
| 3940 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3941 | struct l2cap_chan *chan; |
David S. Miller | bf73484 | 2011-04-25 13:03:02 -0700 | [diff] [blame] | 3942 | struct sock *sk = NULL; |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 3943 | u32 control; |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 3944 | u16 tx_seq; |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3945 | int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3946 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 3947 | chan = l2cap_get_chan_by_scid(conn, cid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3948 | if (!chan) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3949 | BT_DBG("unknown cid 0x%4.4x", cid); |
| 3950 | goto drop; |
| 3951 | } |
| 3952 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3953 | sk = chan->sk; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3954 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 3955 | BT_DBG("chan %p, len %d", chan, skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3956 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 3957 | if (chan->state != BT_CONNECTED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3958 | goto drop; |
| 3959 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3960 | switch (chan->mode) { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3961 | case L2CAP_MODE_BASIC: |
| 3962 | /* If socket recv buffers overflows we drop data here |
| 3963 | * which is *bad* because L2CAP has to be reliable. |
| 3964 | * But we don't have any other choice. L2CAP doesn't |
| 3965 | * provide flow control mechanism. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3966 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3967 | if (chan->imtu < skb->len) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3968 | goto drop; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3969 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 3970 | if (!chan->ops->recv(chan->data, skb)) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3971 | goto done; |
| 3972 | break; |
| 3973 | |
| 3974 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3975 | if (!sock_owned_by_user(sk)) { |
| 3976 | l2cap_ertm_data_rcv(sk, skb); |
Gustavo F. Padovan | 277ffbe | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3977 | } else { |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3978 | if (sk_add_backlog(sk, skb)) |
Gustavo F. Padovan | 277ffbe | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3979 | goto drop; |
Gustavo F. Padovan | 277ffbe | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3980 | } |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3981 | |
Andrei Emeltchenko | fcafde2 | 2009-12-22 15:58:08 +0200 | [diff] [blame] | 3982 | goto done; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3983 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3984 | case L2CAP_MODE_STREAMING: |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 3985 | control = __get_control(chan, skb->data); |
| 3986 | skb_pull(skb, __ctrl_size(chan)); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3987 | len = skb->len; |
| 3988 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3989 | if (l2cap_check_fcs(chan, skb)) |
Gustavo F. Padovan | 2600008 | 2010-05-11 22:02:00 -0300 | [diff] [blame] | 3990 | goto drop; |
| 3991 | |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 3992 | if (__is_sar_start(chan, control)) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 3993 | len -= L2CAP_SDULEN_SIZE; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3994 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3995 | if (chan->fcs == L2CAP_FCS_CRC16) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 3996 | len -= L2CAP_FCS_SIZE; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3997 | |
Andrei Emeltchenko | 793c2f1 | 2011-10-11 13:37:48 +0300 | [diff] [blame] | 3998 | if (len > chan->mps || len < 0 || __is_sframe(chan, control)) |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3999 | goto drop; |
| 4000 | |
Andrei Emeltchenko | fb45de7 | 2011-10-11 13:37:47 +0300 | [diff] [blame] | 4001 | tx_seq = __get_txseq(chan, control); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 4002 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4003 | if (chan->expected_tx_seq != tx_seq) { |
| 4004 | /* Frame(s) missing - must discard partial SDU */ |
| 4005 | kfree_skb(chan->sdu); |
| 4006 | chan->sdu = NULL; |
| 4007 | chan->sdu_last_frag = NULL; |
| 4008 | chan->sdu_len = 0; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 4009 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4010 | /* TODO: Notify userland of missing data */ |
| 4011 | } |
| 4012 | |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 4013 | chan->expected_tx_seq = __next_seq(chan, tx_seq); |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4014 | |
| 4015 | if (l2cap_reassemble_sdu(chan, skb, control) == -EMSGSIZE) |
| 4016 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 4017 | |
| 4018 | goto done; |
| 4019 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4020 | default: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 4021 | 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] | 4022 | break; |
| 4023 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4024 | |
| 4025 | drop: |
| 4026 | kfree_skb(skb); |
| 4027 | |
| 4028 | done: |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4029 | if (sk) |
| 4030 | bh_unlock_sock(sk); |
| 4031 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4032 | return 0; |
| 4033 | } |
| 4034 | |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 4035 | 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] | 4036 | { |
David S. Miller | 6dcae1e | 2011-05-16 23:09:26 -0400 | [diff] [blame] | 4037 | struct sock *sk = NULL; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4038 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4039 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4040 | chan = l2cap_global_chan_by_psm(0, psm, conn->src); |
| 4041 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4042 | goto drop; |
| 4043 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4044 | sk = chan->sk; |
| 4045 | |
Gustavo F. Padovan | e0f0cb5 | 2010-11-01 18:43:53 +0000 | [diff] [blame] | 4046 | bh_lock_sock(sk); |
| 4047 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4048 | BT_DBG("sk %p, len %d", sk, skb->len); |
| 4049 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4050 | if (chan->state != BT_BOUND && chan->state != BT_CONNECTED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4051 | goto drop; |
| 4052 | |
Vinicius Costa Gomes | e13e21d | 2011-06-17 22:46:27 -0300 | [diff] [blame] | 4053 | if (chan->imtu < skb->len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4054 | goto drop; |
| 4055 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 4056 | if (!chan->ops->recv(chan->data, skb)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4057 | goto done; |
| 4058 | |
| 4059 | drop: |
| 4060 | kfree_skb(skb); |
| 4061 | |
| 4062 | done: |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 4063 | if (sk) |
| 4064 | bh_unlock_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4065 | return 0; |
| 4066 | } |
| 4067 | |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4068 | static inline int l2cap_att_channel(struct l2cap_conn *conn, __le16 cid, struct sk_buff *skb) |
| 4069 | { |
David S. Miller | 6dcae1e | 2011-05-16 23:09:26 -0400 | [diff] [blame] | 4070 | struct sock *sk = NULL; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4071 | struct l2cap_chan *chan; |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4072 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4073 | chan = l2cap_global_chan_by_scid(0, cid, conn->src); |
| 4074 | if (!chan) |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4075 | goto drop; |
| 4076 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4077 | sk = chan->sk; |
| 4078 | |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4079 | bh_lock_sock(sk); |
| 4080 | |
| 4081 | BT_DBG("sk %p, len %d", sk, skb->len); |
| 4082 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4083 | if (chan->state != BT_BOUND && chan->state != BT_CONNECTED) |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4084 | goto drop; |
| 4085 | |
Vinicius Costa Gomes | e13e21d | 2011-06-17 22:46:27 -0300 | [diff] [blame] | 4086 | if (chan->imtu < skb->len) |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4087 | goto drop; |
| 4088 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 4089 | if (!chan->ops->recv(chan->data, skb)) |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4090 | goto done; |
| 4091 | |
| 4092 | drop: |
| 4093 | kfree_skb(skb); |
| 4094 | |
| 4095 | done: |
| 4096 | if (sk) |
| 4097 | bh_unlock_sock(sk); |
| 4098 | return 0; |
| 4099 | } |
| 4100 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4101 | static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) |
| 4102 | { |
| 4103 | struct l2cap_hdr *lh = (void *) skb->data; |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 4104 | u16 cid, len; |
| 4105 | __le16 psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4106 | |
| 4107 | skb_pull(skb, L2CAP_HDR_SIZE); |
| 4108 | cid = __le16_to_cpu(lh->cid); |
| 4109 | len = __le16_to_cpu(lh->len); |
| 4110 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4111 | if (len != skb->len) { |
| 4112 | kfree_skb(skb); |
| 4113 | return; |
| 4114 | } |
| 4115 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4116 | BT_DBG("len %d, cid 0x%4.4x", len, cid); |
| 4117 | |
| 4118 | switch (cid) { |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 4119 | case L2CAP_CID_LE_SIGNALING: |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 4120 | case L2CAP_CID_SIGNALING: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4121 | l2cap_sig_channel(conn, skb); |
| 4122 | break; |
| 4123 | |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 4124 | case L2CAP_CID_CONN_LESS: |
Gustavo F. Padovan | 1b7bf4e | 2009-08-24 00:45:20 -0300 | [diff] [blame] | 4125 | psm = get_unaligned_le16(skb->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4126 | skb_pull(skb, 2); |
| 4127 | l2cap_conless_channel(conn, psm, skb); |
| 4128 | break; |
| 4129 | |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4130 | case L2CAP_CID_LE_DATA: |
| 4131 | l2cap_att_channel(conn, cid, skb); |
| 4132 | break; |
| 4133 | |
Anderson Briglia | b501d6a | 2011-06-07 18:46:31 -0300 | [diff] [blame] | 4134 | case L2CAP_CID_SMP: |
| 4135 | if (smp_sig_channel(conn, skb)) |
| 4136 | l2cap_conn_del(conn->hcon, EACCES); |
| 4137 | break; |
| 4138 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4139 | default: |
| 4140 | l2cap_data_channel(conn, cid, skb); |
| 4141 | break; |
| 4142 | } |
| 4143 | } |
| 4144 | |
| 4145 | /* ---- L2CAP interface with lower layer (HCI) ---- */ |
| 4146 | |
| 4147 | static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) |
| 4148 | { |
| 4149 | int exact = 0, lm1 = 0, lm2 = 0; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4150 | struct l2cap_chan *c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4151 | |
| 4152 | if (type != ACL_LINK) |
João Paulo Rechi Vita | 963cf68 | 2010-06-22 13:56:28 -0300 | [diff] [blame] | 4153 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4154 | |
| 4155 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); |
| 4156 | |
| 4157 | /* Find listening sockets and check their link_mode */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4158 | read_lock(&chan_list_lock); |
| 4159 | list_for_each_entry(c, &chan_list, global_l) { |
| 4160 | struct sock *sk = c->sk; |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4161 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4162 | if (c->state != BT_LISTEN) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4163 | continue; |
| 4164 | |
| 4165 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 4166 | lm1 |= HCI_LM_ACCEPT; |
Andrei Emeltchenko | 43bd0f3 | 2011-10-11 14:04:34 +0300 | [diff] [blame] | 4167 | if (test_bit(FLAG_ROLE_SWITCH, &c->flags)) |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 4168 | lm1 |= HCI_LM_MASTER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4169 | exact++; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 4170 | } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { |
| 4171 | lm2 |= HCI_LM_ACCEPT; |
Andrei Emeltchenko | 43bd0f3 | 2011-10-11 14:04:34 +0300 | [diff] [blame] | 4172 | if (test_bit(FLAG_ROLE_SWITCH, &c->flags)) |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 4173 | lm2 |= HCI_LM_MASTER; |
| 4174 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4175 | } |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4176 | read_unlock(&chan_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4177 | |
| 4178 | return exact ? lm1 : lm2; |
| 4179 | } |
| 4180 | |
| 4181 | static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) |
| 4182 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4183 | struct l2cap_conn *conn; |
| 4184 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4185 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); |
| 4186 | |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 4187 | if (!(hcon->type == ACL_LINK || hcon->type == LE_LINK)) |
João Paulo Rechi Vita | 963cf68 | 2010-06-22 13:56:28 -0300 | [diff] [blame] | 4188 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4189 | |
| 4190 | if (!status) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4191 | conn = l2cap_conn_add(hcon, status); |
| 4192 | if (conn) |
| 4193 | l2cap_conn_ready(conn); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4194 | } else |
Joe Perches | e175072 | 2011-06-29 18:18:29 -0700 | [diff] [blame] | 4195 | l2cap_conn_del(hcon, bt_to_errno(status)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4196 | |
| 4197 | return 0; |
| 4198 | } |
| 4199 | |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 4200 | static int l2cap_disconn_ind(struct hci_conn *hcon) |
| 4201 | { |
| 4202 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 4203 | |
| 4204 | BT_DBG("hcon %p", hcon); |
| 4205 | |
Gustavo F. Padovan | b569450 | 2011-06-08 19:09:13 -0300 | [diff] [blame] | 4206 | if ((hcon->type != ACL_LINK && hcon->type != LE_LINK) || !conn) |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 4207 | return 0x13; |
| 4208 | |
| 4209 | return conn->disc_reason; |
| 4210 | } |
| 4211 | |
| 4212 | static int l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4213 | { |
| 4214 | BT_DBG("hcon %p reason %d", hcon, reason); |
| 4215 | |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 4216 | if (!(hcon->type == ACL_LINK || hcon->type == LE_LINK)) |
João Paulo Rechi Vita | 963cf68 | 2010-06-22 13:56:28 -0300 | [diff] [blame] | 4217 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4218 | |
Joe Perches | e175072 | 2011-06-29 18:18:29 -0700 | [diff] [blame] | 4219 | l2cap_conn_del(hcon, bt_to_errno(reason)); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4220 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4221 | return 0; |
| 4222 | } |
| 4223 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4224 | static inline void l2cap_check_encryption(struct l2cap_chan *chan, u8 encrypt) |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4225 | { |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 4226 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) |
Marcel Holtmann | 255c760 | 2009-02-04 21:07:19 +0100 | [diff] [blame] | 4227 | return; |
| 4228 | |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4229 | if (encrypt == 0x00) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4230 | if (chan->sec_level == BT_SECURITY_MEDIUM) { |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 4231 | __clear_chan_timer(chan); |
| 4232 | __set_chan_timer(chan, HZ * 5); |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4233 | } else if (chan->sec_level == BT_SECURITY_HIGH) |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 4234 | l2cap_chan_close(chan, ECONNREFUSED); |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4235 | } else { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4236 | if (chan->sec_level == BT_SECURITY_MEDIUM) |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 4237 | __clear_chan_timer(chan); |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4238 | } |
| 4239 | } |
| 4240 | |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 4241 | static int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4242 | { |
Marcel Holtmann | 40be492 | 2008-07-14 20:13:50 +0200 | [diff] [blame] | 4243 | struct l2cap_conn *conn = hcon->l2cap_data; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4244 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4245 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4246 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4247 | return 0; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4248 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4249 | BT_DBG("conn %p", conn); |
| 4250 | |
Vinicius Costa Gomes | 160dc6a | 2011-08-19 21:06:55 -0300 | [diff] [blame] | 4251 | if (hcon->type == LE_LINK) { |
| 4252 | smp_distribute_keys(conn, 0); |
| 4253 | del_timer(&conn->security_timer); |
| 4254 | } |
| 4255 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 4256 | read_lock(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4257 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 4258 | list_for_each_entry(chan, &conn->chan_l, list) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4259 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 4260 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4261 | bh_lock_sock(sk); |
| 4262 | |
Vinicius Costa Gomes | f1cb9af | 2011-01-26 21:42:57 -0300 | [diff] [blame] | 4263 | BT_DBG("chan->scid %d", chan->scid); |
| 4264 | |
| 4265 | if (chan->scid == L2CAP_CID_LE_DATA) { |
| 4266 | if (!status && encrypt) { |
| 4267 | chan->sec_level = hcon->sec_level; |
| 4268 | l2cap_chan_ready(sk); |
| 4269 | } |
| 4270 | |
| 4271 | bh_unlock_sock(sk); |
| 4272 | continue; |
| 4273 | } |
| 4274 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 4275 | if (test_bit(CONF_CONNECT_PEND, &chan->conf_state)) { |
Marcel Holtmann | 6a8d301 | 2009-02-06 23:56:36 +0100 | [diff] [blame] | 4276 | bh_unlock_sock(sk); |
| 4277 | continue; |
| 4278 | } |
| 4279 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4280 | if (!status && (chan->state == BT_CONNECTED || |
| 4281 | chan->state == BT_CONFIG)) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4282 | l2cap_check_encryption(chan, encrypt); |
Marcel Holtmann | 9719f8a | 2008-07-14 20:13:45 +0200 | [diff] [blame] | 4283 | bh_unlock_sock(sk); |
| 4284 | continue; |
| 4285 | } |
| 4286 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4287 | if (chan->state == BT_CONNECT) { |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4288 | if (!status) { |
| 4289 | struct l2cap_conn_req req; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 4290 | req.scid = cpu_to_le16(chan->scid); |
| 4291 | req.psm = chan->psm; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4292 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 4293 | chan->ident = l2cap_get_ident(conn); |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 4294 | set_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4295 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 4296 | l2cap_send_cmd(conn, chan->ident, |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4297 | L2CAP_CONN_REQ, sizeof(req), &req); |
| 4298 | } else { |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 4299 | __clear_chan_timer(chan); |
| 4300 | __set_chan_timer(chan, HZ / 10); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4301 | } |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4302 | } else if (chan->state == BT_CONNECT2) { |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4303 | struct l2cap_conn_rsp rsp; |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4304 | __u16 res, stat; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4305 | |
| 4306 | if (!status) { |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4307 | if (bt_sk(sk)->defer_setup) { |
| 4308 | struct sock *parent = bt_sk(sk)->parent; |
| 4309 | res = L2CAP_CR_PEND; |
| 4310 | stat = L2CAP_CS_AUTHOR_PEND; |
Ilia Kolomisnky | 05e9a2f | 2011-07-15 18:30:21 +0000 | [diff] [blame] | 4311 | if (parent) |
| 4312 | parent->sk_data_ready(parent, 0); |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4313 | } else { |
Gustavo F. Padovan | 0555891 | 2011-06-21 14:52:56 -0300 | [diff] [blame] | 4314 | l2cap_state_change(chan, BT_CONFIG); |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4315 | res = L2CAP_CR_SUCCESS; |
| 4316 | stat = L2CAP_CS_NO_INFO; |
| 4317 | } |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4318 | } else { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4319 | l2cap_state_change(chan, BT_DISCONN); |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 4320 | __set_chan_timer(chan, HZ / 10); |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4321 | res = L2CAP_CR_SEC_BLOCK; |
| 4322 | stat = L2CAP_CS_NO_INFO; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4323 | } |
| 4324 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 4325 | rsp.scid = cpu_to_le16(chan->dcid); |
| 4326 | rsp.dcid = cpu_to_le16(chan->scid); |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4327 | rsp.result = cpu_to_le16(res); |
| 4328 | rsp.status = cpu_to_le16(stat); |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 4329 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, |
| 4330 | sizeof(rsp), &rsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4331 | } |
| 4332 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4333 | bh_unlock_sock(sk); |
| 4334 | } |
| 4335 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 4336 | read_unlock(&conn->chan_lock); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4337 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4338 | return 0; |
| 4339 | } |
| 4340 | |
| 4341 | static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) |
| 4342 | { |
| 4343 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 4344 | |
Andrei Emeltchenko | 5a08ecc | 2011-01-11 17:20:20 +0200 | [diff] [blame] | 4345 | if (!conn) |
| 4346 | conn = l2cap_conn_add(hcon, 0); |
| 4347 | |
| 4348 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4349 | goto drop; |
| 4350 | |
| 4351 | BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); |
| 4352 | |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 4353 | if (!(flags & ACL_CONT)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4354 | struct l2cap_hdr *hdr; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4355 | struct l2cap_chan *chan; |
Andrei Emeltchenko | 8979481 | 2010-09-15 14:28:44 +0300 | [diff] [blame] | 4356 | u16 cid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4357 | int len; |
| 4358 | |
| 4359 | if (conn->rx_len) { |
| 4360 | BT_ERR("Unexpected start frame (len %d)", skb->len); |
| 4361 | kfree_skb(conn->rx_skb); |
| 4362 | conn->rx_skb = NULL; |
| 4363 | conn->rx_len = 0; |
| 4364 | l2cap_conn_unreliable(conn, ECOMM); |
| 4365 | } |
| 4366 | |
Andrei Emeltchenko | aae7fe2 | 2010-09-15 14:28:43 +0300 | [diff] [blame] | 4367 | /* Start fragment always begin with Basic L2CAP header */ |
| 4368 | if (skb->len < L2CAP_HDR_SIZE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4369 | BT_ERR("Frame is too short (len %d)", skb->len); |
| 4370 | l2cap_conn_unreliable(conn, ECOMM); |
| 4371 | goto drop; |
| 4372 | } |
| 4373 | |
| 4374 | hdr = (struct l2cap_hdr *) skb->data; |
| 4375 | len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; |
Andrei Emeltchenko | 8979481 | 2010-09-15 14:28:44 +0300 | [diff] [blame] | 4376 | cid = __le16_to_cpu(hdr->cid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4377 | |
| 4378 | if (len == skb->len) { |
| 4379 | /* Complete frame received */ |
| 4380 | l2cap_recv_frame(conn, skb); |
| 4381 | return 0; |
| 4382 | } |
| 4383 | |
| 4384 | BT_DBG("Start: total len %d, frag len %d", len, skb->len); |
| 4385 | |
| 4386 | if (skb->len > len) { |
| 4387 | BT_ERR("Frame is too long (len %d, expected len %d)", |
| 4388 | skb->len, len); |
| 4389 | l2cap_conn_unreliable(conn, ECOMM); |
| 4390 | goto drop; |
| 4391 | } |
| 4392 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 4393 | chan = l2cap_get_chan_by_scid(conn, cid); |
Andrei Emeltchenko | 8979481 | 2010-09-15 14:28:44 +0300 | [diff] [blame] | 4394 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4395 | if (chan && chan->sk) { |
| 4396 | struct sock *sk = chan->sk; |
| 4397 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 4398 | if (chan->imtu < len - L2CAP_HDR_SIZE) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4399 | BT_ERR("Frame exceeding recv MTU (len %d, " |
| 4400 | "MTU %d)", len, |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 4401 | chan->imtu); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4402 | bh_unlock_sock(sk); |
| 4403 | l2cap_conn_unreliable(conn, ECOMM); |
| 4404 | goto drop; |
| 4405 | } |
Andrei Emeltchenko | 8979481 | 2010-09-15 14:28:44 +0300 | [diff] [blame] | 4406 | bh_unlock_sock(sk); |
Andrei Emeltchenko | 8979481 | 2010-09-15 14:28:44 +0300 | [diff] [blame] | 4407 | } |
| 4408 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4409 | /* Allocate skb for the complete frame (with header) */ |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 4410 | conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC); |
| 4411 | if (!conn->rx_skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4412 | goto drop; |
| 4413 | |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 4414 | 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] | 4415 | skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4416 | conn->rx_len = len - skb->len; |
| 4417 | } else { |
| 4418 | BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); |
| 4419 | |
| 4420 | if (!conn->rx_len) { |
| 4421 | BT_ERR("Unexpected continuation frame (len %d)", skb->len); |
| 4422 | l2cap_conn_unreliable(conn, ECOMM); |
| 4423 | goto drop; |
| 4424 | } |
| 4425 | |
| 4426 | if (skb->len > conn->rx_len) { |
| 4427 | BT_ERR("Fragment is too long (len %d, expected %d)", |
| 4428 | skb->len, conn->rx_len); |
| 4429 | kfree_skb(conn->rx_skb); |
| 4430 | conn->rx_skb = NULL; |
| 4431 | conn->rx_len = 0; |
| 4432 | l2cap_conn_unreliable(conn, ECOMM); |
| 4433 | goto drop; |
| 4434 | } |
| 4435 | |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 4436 | 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] | 4437 | skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4438 | conn->rx_len -= skb->len; |
| 4439 | |
| 4440 | if (!conn->rx_len) { |
| 4441 | /* Complete frame received */ |
| 4442 | l2cap_recv_frame(conn, conn->rx_skb); |
| 4443 | conn->rx_skb = NULL; |
| 4444 | } |
| 4445 | } |
| 4446 | |
| 4447 | drop: |
| 4448 | kfree_skb(skb); |
| 4449 | return 0; |
| 4450 | } |
| 4451 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4452 | static int l2cap_debugfs_show(struct seq_file *f, void *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4453 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4454 | struct l2cap_chan *c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4455 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4456 | read_lock_bh(&chan_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4457 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4458 | list_for_each_entry(c, &chan_list, global_l) { |
| 4459 | struct sock *sk = c->sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4460 | |
Gustavo F. Padovan | 903d343 | 2011-02-10 14:16:06 -0200 | [diff] [blame] | 4461 | 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] | 4462 | batostr(&bt_sk(sk)->src), |
| 4463 | batostr(&bt_sk(sk)->dst), |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4464 | c->state, __le16_to_cpu(c->psm), |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4465 | c->scid, c->dcid, c->imtu, c->omtu, |
| 4466 | c->sec_level, c->mode); |
Gustavo F. Padovan | 0555891 | 2011-06-21 14:52:56 -0300 | [diff] [blame] | 4467 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4468 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4469 | read_unlock_bh(&chan_list_lock); |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 4470 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4471 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4472 | } |
| 4473 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4474 | static int l2cap_debugfs_open(struct inode *inode, struct file *file) |
| 4475 | { |
| 4476 | return single_open(file, l2cap_debugfs_show, inode->i_private); |
| 4477 | } |
| 4478 | |
| 4479 | static const struct file_operations l2cap_debugfs_fops = { |
| 4480 | .open = l2cap_debugfs_open, |
| 4481 | .read = seq_read, |
| 4482 | .llseek = seq_lseek, |
| 4483 | .release = single_release, |
| 4484 | }; |
| 4485 | |
| 4486 | static struct dentry *l2cap_debugfs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4487 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4488 | static struct hci_proto l2cap_hci_proto = { |
| 4489 | .name = "L2CAP", |
| 4490 | .id = HCI_PROTO_L2CAP, |
| 4491 | .connect_ind = l2cap_connect_ind, |
| 4492 | .connect_cfm = l2cap_connect_cfm, |
| 4493 | .disconn_ind = l2cap_disconn_ind, |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 4494 | .disconn_cfm = l2cap_disconn_cfm, |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 4495 | .security_cfm = l2cap_security_cfm, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4496 | .recv_acldata = l2cap_recv_acldata |
| 4497 | }; |
| 4498 | |
Gustavo F. Padovan | 6427451 | 2011-02-07 20:08:52 -0200 | [diff] [blame] | 4499 | int __init l2cap_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4500 | { |
| 4501 | int err; |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 4502 | |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 4503 | err = l2cap_init_sockets(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4504 | if (err < 0) |
| 4505 | return err; |
| 4506 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4507 | err = hci_register_proto(&l2cap_hci_proto); |
| 4508 | if (err < 0) { |
| 4509 | BT_ERR("L2CAP protocol registration failed"); |
| 4510 | bt_sock_unregister(BTPROTO_L2CAP); |
| 4511 | goto error; |
| 4512 | } |
| 4513 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4514 | if (bt_debugfs) { |
| 4515 | l2cap_debugfs = debugfs_create_file("l2cap", 0444, |
| 4516 | bt_debugfs, NULL, &l2cap_debugfs_fops); |
| 4517 | if (!l2cap_debugfs) |
| 4518 | BT_ERR("Failed to create L2CAP debug file"); |
| 4519 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4520 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4521 | return 0; |
| 4522 | |
| 4523 | error: |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 4524 | l2cap_cleanup_sockets(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4525 | return err; |
| 4526 | } |
| 4527 | |
Gustavo F. Padovan | 6427451 | 2011-02-07 20:08:52 -0200 | [diff] [blame] | 4528 | void l2cap_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4529 | { |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4530 | debugfs_remove(l2cap_debugfs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4531 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4532 | if (hci_unregister_proto(&l2cap_hci_proto) < 0) |
| 4533 | BT_ERR("L2CAP protocol unregistration failed"); |
| 4534 | |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 4535 | l2cap_cleanup_sockets(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4536 | } |
| 4537 | |
Gustavo F. Padovan | d1c4a17 | 2010-07-18 16:25:54 -0300 | [diff] [blame] | 4538 | module_param(disable_ertm, bool, 0644); |
| 4539 | MODULE_PARM_DESC(disable_ertm, "Disable enhanced retransmission mode"); |
Andrei Emeltchenko | a5fd6f3 | 2011-09-16 16:26:32 +0300 | [diff] [blame] | 4540 | |
| 4541 | module_param(enable_hs, bool, 0644); |
| 4542 | MODULE_PARM_DESC(enable_hs, "Enable High Speed"); |