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; |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 60 | |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 61 | static u32 l2cap_feat_mask = L2CAP_FEAT_FIXED_CHAN; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 62 | static u8 l2cap_fixed_chan[8] = { 0x02, }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 64 | static struct workqueue_struct *_busy_wq; |
| 65 | |
Johannes Berg | b5ad8b7 | 2011-06-01 08:54:45 +0200 | [diff] [blame] | 66 | static LIST_HEAD(chan_list); |
| 67 | static DEFINE_RWLOCK(chan_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 69 | static void l2cap_busy_work(struct work_struct *work); |
| 70 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, |
| 72 | u8 code, u8 ident, u16 dlen, void *data); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 73 | static void l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, |
| 74 | void *data); |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 75 | 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] | 76 | static void l2cap_send_disconn_req(struct l2cap_conn *conn, |
| 77 | struct l2cap_chan *chan, int err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 79 | static int l2cap_ertm_data_rcv(struct sock *sk, struct sk_buff *skb); |
| 80 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 81 | /* ---- L2CAP channels ---- */ |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 82 | |
| 83 | static inline void chan_hold(struct l2cap_chan *c) |
| 84 | { |
| 85 | atomic_inc(&c->refcnt); |
| 86 | } |
| 87 | |
| 88 | static inline void chan_put(struct l2cap_chan *c) |
| 89 | { |
| 90 | if (atomic_dec_and_test(&c->refcnt)) |
| 91 | kfree(c); |
| 92 | } |
| 93 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 94 | 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] | 95 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 96 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 97 | |
| 98 | list_for_each_entry(c, &conn->chan_l, list) { |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 99 | if (c->dcid == cid) |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 100 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 101 | } |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 102 | return NULL; |
| 103 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 104 | } |
| 105 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 106 | 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] | 107 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 108 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 109 | |
| 110 | list_for_each_entry(c, &conn->chan_l, list) { |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 111 | if (c->scid == cid) |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 112 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 113 | } |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 114 | return NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 115 | } |
| 116 | |
| 117 | /* Find channel with given SCID. |
| 118 | * Returns locked socket */ |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 119 | 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] | 120 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 121 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 122 | |
| 123 | read_lock(&conn->chan_lock); |
| 124 | c = __l2cap_get_chan_by_scid(conn, cid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 125 | if (c) |
| 126 | bh_lock_sock(c->sk); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 127 | read_unlock(&conn->chan_lock); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 128 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 129 | } |
| 130 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 131 | 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] | 132 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 133 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 134 | |
| 135 | list_for_each_entry(c, &conn->chan_l, list) { |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 136 | if (c->ident == ident) |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 137 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 138 | } |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 139 | return NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 140 | } |
| 141 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 142 | 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] | 143 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 144 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 145 | |
| 146 | read_lock(&conn->chan_lock); |
| 147 | c = __l2cap_get_chan_by_ident(conn, ident); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 148 | if (c) |
| 149 | bh_lock_sock(c->sk); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 150 | read_unlock(&conn->chan_lock); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 151 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 152 | } |
| 153 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 154 | 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] | 155 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 156 | struct l2cap_chan *c; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 157 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 158 | list_for_each_entry(c, &chan_list, global_l) { |
| 159 | if (c->sport == psm && !bacmp(&bt_sk(c->sk)->src, src)) |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 160 | goto found; |
| 161 | } |
| 162 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 163 | c = NULL; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 164 | found: |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 165 | return c; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 166 | } |
| 167 | |
| 168 | int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm) |
| 169 | { |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 170 | int err; |
| 171 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 172 | write_lock_bh(&chan_list_lock); |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 173 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 174 | if (psm && __l2cap_global_chan_by_addr(psm, src)) { |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 175 | err = -EADDRINUSE; |
| 176 | goto done; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 177 | } |
| 178 | |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 179 | if (psm) { |
| 180 | chan->psm = psm; |
| 181 | chan->sport = psm; |
| 182 | err = 0; |
| 183 | } else { |
| 184 | u16 p; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 185 | |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 186 | err = -EINVAL; |
| 187 | for (p = 0x1001; p < 0x1100; p += 2) |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 188 | if (!__l2cap_global_chan_by_addr(cpu_to_le16(p), src)) { |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 189 | chan->psm = cpu_to_le16(p); |
| 190 | chan->sport = cpu_to_le16(p); |
| 191 | err = 0; |
| 192 | break; |
| 193 | } |
| 194 | } |
| 195 | |
| 196 | done: |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 197 | write_unlock_bh(&chan_list_lock); |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 198 | return err; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 199 | } |
| 200 | |
| 201 | int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid) |
| 202 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 203 | write_lock_bh(&chan_list_lock); |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 204 | |
| 205 | chan->scid = scid; |
| 206 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 207 | write_unlock_bh(&chan_list_lock); |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 208 | |
| 209 | return 0; |
| 210 | } |
| 211 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 212 | static u16 l2cap_alloc_cid(struct l2cap_conn *conn) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 213 | { |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 214 | u16 cid = L2CAP_CID_DYN_START; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 215 | |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 216 | for (; cid < L2CAP_CID_DYN_END; cid++) { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 217 | if (!__l2cap_get_chan_by_scid(conn, cid)) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 218 | return cid; |
| 219 | } |
| 220 | |
| 221 | return 0; |
| 222 | } |
| 223 | |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 224 | 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] | 225 | { |
Mat Martineau | 774e565 | 2011-06-29 14:35:20 -0700 | [diff] [blame] | 226 | BT_DBG("chan %p state %d timeout %ld", chan->sk, chan->state, timeout); |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 227 | |
Mat Martineau | 942ecc9 | 2011-06-29 14:35:21 -0700 | [diff] [blame] | 228 | if (!mod_timer(timer, jiffies + msecs_to_jiffies(timeout))) |
Mat Martineau | 774e565 | 2011-06-29 14:35:20 -0700 | [diff] [blame] | 229 | chan_hold(chan); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 230 | } |
| 231 | |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 232 | 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] | 233 | { |
Mat Martineau | 774e565 | 2011-06-29 14:35:20 -0700 | [diff] [blame] | 234 | BT_DBG("chan %p state %d", chan, chan->state); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 235 | |
Mat Martineau | 774e565 | 2011-06-29 14:35:20 -0700 | [diff] [blame] | 236 | if (timer_pending(timer) && del_timer(timer)) |
| 237 | chan_put(chan); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 238 | } |
| 239 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 240 | static void l2cap_state_change(struct l2cap_chan *chan, int state) |
| 241 | { |
| 242 | chan->state = state; |
| 243 | chan->ops->state_change(chan->data, state); |
| 244 | } |
| 245 | |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 246 | static void l2cap_chan_timeout(unsigned long arg) |
| 247 | { |
| 248 | struct l2cap_chan *chan = (struct l2cap_chan *) arg; |
| 249 | struct sock *sk = chan->sk; |
| 250 | int reason; |
| 251 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 252 | BT_DBG("chan %p state %d", chan, chan->state); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 253 | |
| 254 | bh_lock_sock(sk); |
| 255 | |
| 256 | if (sock_owned_by_user(sk)) { |
| 257 | /* sk is owned by user. Try again later */ |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 258 | __set_chan_timer(chan, HZ / 5); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 259 | bh_unlock_sock(sk); |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 260 | chan_put(chan); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 261 | return; |
| 262 | } |
| 263 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 264 | if (chan->state == BT_CONNECTED || chan->state == BT_CONFIG) |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 265 | reason = ECONNREFUSED; |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 266 | else if (chan->state == BT_CONNECT && |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 267 | chan->sec_level != BT_SECURITY_SDP) |
| 268 | reason = ECONNREFUSED; |
| 269 | else |
| 270 | reason = ETIMEDOUT; |
| 271 | |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 272 | l2cap_chan_close(chan, reason); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 273 | |
| 274 | bh_unlock_sock(sk); |
| 275 | |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 276 | chan->ops->close(chan->data); |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 277 | chan_put(chan); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 278 | } |
| 279 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 280 | struct l2cap_chan *l2cap_chan_create(struct sock *sk) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 281 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 282 | struct l2cap_chan *chan; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 283 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 284 | chan = kzalloc(sizeof(*chan), GFP_ATOMIC); |
| 285 | if (!chan) |
| 286 | return NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 287 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 288 | chan->sk = sk; |
| 289 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 290 | write_lock_bh(&chan_list_lock); |
| 291 | list_add(&chan->global_l, &chan_list); |
| 292 | write_unlock_bh(&chan_list_lock); |
| 293 | |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 294 | setup_timer(&chan->chan_timer, l2cap_chan_timeout, (unsigned long) chan); |
| 295 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 296 | chan->state = BT_OPEN; |
| 297 | |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 298 | atomic_set(&chan->refcnt, 1); |
| 299 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 300 | return chan; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 301 | } |
| 302 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 303 | void l2cap_chan_destroy(struct l2cap_chan *chan) |
Gustavo F. Padovan | 6ff5abb | 2011-04-25 15:10:41 -0300 | [diff] [blame] | 304 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 305 | write_lock_bh(&chan_list_lock); |
| 306 | list_del(&chan->global_l); |
| 307 | write_unlock_bh(&chan_list_lock); |
| 308 | |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 309 | chan_put(chan); |
Gustavo F. Padovan | 6ff5abb | 2011-04-25 15:10:41 -0300 | [diff] [blame] | 310 | } |
| 311 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 312 | 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] | 313 | { |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 314 | 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] | 315 | chan->psm, chan->dcid); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 316 | |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 317 | conn->disc_reason = 0x13; |
| 318 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 319 | chan->conn = conn; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 320 | |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 321 | if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED) { |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 322 | if (conn->hcon->type == LE_LINK) { |
| 323 | /* LE connection */ |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 324 | chan->omtu = L2CAP_LE_DEFAULT_MTU; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 325 | chan->scid = L2CAP_CID_LE_DATA; |
| 326 | chan->dcid = L2CAP_CID_LE_DATA; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 327 | } else { |
| 328 | /* Alloc CID for connection-oriented socket */ |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 329 | chan->scid = l2cap_alloc_cid(conn); |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 330 | chan->omtu = L2CAP_DEFAULT_MTU; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 331 | } |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 332 | } else if (chan->chan_type == L2CAP_CHAN_CONN_LESS) { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 333 | /* Connectionless socket */ |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 334 | chan->scid = L2CAP_CID_CONN_LESS; |
| 335 | chan->dcid = L2CAP_CID_CONN_LESS; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 336 | chan->omtu = L2CAP_DEFAULT_MTU; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 337 | } else { |
| 338 | /* Raw socket can send/recv signalling messages only */ |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 339 | chan->scid = L2CAP_CID_SIGNALING; |
| 340 | chan->dcid = L2CAP_CID_SIGNALING; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 341 | chan->omtu = L2CAP_DEFAULT_MTU; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 342 | } |
| 343 | |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 344 | chan_hold(chan); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 345 | |
| 346 | list_add(&chan->list, &conn->chan_l); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 347 | } |
| 348 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 349 | /* Delete channel. |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 350 | * Must be called on the locked socket. */ |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 351 | static void l2cap_chan_del(struct l2cap_chan *chan, int err) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 352 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 353 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 354 | struct l2cap_conn *conn = chan->conn; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 355 | struct sock *parent = bt_sk(sk)->parent; |
| 356 | |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 357 | __clear_chan_timer(chan); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 358 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 359 | BT_DBG("chan %p, conn %p, err %d", chan, conn, err); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 360 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 361 | if (conn) { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 362 | /* Delete from channel list */ |
| 363 | write_lock_bh(&conn->chan_lock); |
| 364 | list_del(&chan->list); |
| 365 | write_unlock_bh(&conn->chan_lock); |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 366 | chan_put(chan); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 367 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 368 | chan->conn = NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 369 | hci_conn_put(conn->hcon); |
| 370 | } |
| 371 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 372 | l2cap_state_change(chan, BT_CLOSED); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 373 | sock_set_flag(sk, SOCK_ZAPPED); |
| 374 | |
| 375 | if (err) |
| 376 | sk->sk_err = err; |
| 377 | |
| 378 | if (parent) { |
| 379 | bt_accept_unlink(sk); |
| 380 | parent->sk_data_ready(parent, 0); |
| 381 | } else |
| 382 | sk->sk_state_change(sk); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 383 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 384 | if (!(test_bit(CONF_OUTPUT_DONE, &chan->conf_state) && |
| 385 | test_bit(CONF_INPUT_DONE, &chan->conf_state))) |
Gustavo F. Padovan | 6ff5abb | 2011-04-25 15:10:41 -0300 | [diff] [blame] | 386 | return; |
Gustavo F. Padovan | 2ead70b | 2011-04-01 15:13:36 -0300 | [diff] [blame] | 387 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 388 | skb_queue_purge(&chan->tx_q); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 389 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 390 | if (chan->mode == L2CAP_MODE_ERTM) { |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 391 | struct srej_list *l, *tmp; |
| 392 | |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 393 | __clear_retrans_timer(chan); |
| 394 | __clear_monitor_timer(chan); |
| 395 | __clear_ack_timer(chan); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 396 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 397 | skb_queue_purge(&chan->srej_q); |
| 398 | skb_queue_purge(&chan->busy_q); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 399 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 400 | list_for_each_entry_safe(l, tmp, &chan->srej_l, list) { |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 401 | list_del(&l->list); |
| 402 | kfree(l); |
| 403 | } |
| 404 | } |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 405 | } |
| 406 | |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 407 | static void l2cap_chan_cleanup_listen(struct sock *parent) |
| 408 | { |
| 409 | struct sock *sk; |
| 410 | |
| 411 | BT_DBG("parent %p", parent); |
| 412 | |
| 413 | /* Close not yet accepted channels */ |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 414 | while ((sk = bt_accept_dequeue(parent, NULL))) { |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 415 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 416 | __clear_chan_timer(chan); |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 417 | lock_sock(sk); |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 418 | l2cap_chan_close(chan, ECONNRESET); |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 419 | release_sock(sk); |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 420 | chan->ops->close(chan->data); |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 421 | } |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 422 | } |
| 423 | |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 424 | void l2cap_chan_close(struct l2cap_chan *chan, int reason) |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 425 | { |
| 426 | struct l2cap_conn *conn = chan->conn; |
| 427 | struct sock *sk = chan->sk; |
| 428 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 429 | 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] | 430 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 431 | switch (chan->state) { |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 432 | case BT_LISTEN: |
| 433 | l2cap_chan_cleanup_listen(sk); |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 434 | |
| 435 | l2cap_state_change(chan, BT_CLOSED); |
| 436 | sock_set_flag(sk, SOCK_ZAPPED); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 437 | break; |
| 438 | |
| 439 | case BT_CONNECTED: |
| 440 | case BT_CONFIG: |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 441 | if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 442 | conn->hcon->type == ACL_LINK) { |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 443 | __clear_chan_timer(chan); |
| 444 | __set_chan_timer(chan, sk->sk_sndtimeo); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 445 | l2cap_send_disconn_req(conn, chan, reason); |
| 446 | } else |
| 447 | l2cap_chan_del(chan, reason); |
| 448 | break; |
| 449 | |
| 450 | case BT_CONNECT2: |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 451 | if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 452 | conn->hcon->type == ACL_LINK) { |
| 453 | struct l2cap_conn_rsp rsp; |
| 454 | __u16 result; |
| 455 | |
| 456 | if (bt_sk(sk)->defer_setup) |
| 457 | result = L2CAP_CR_SEC_BLOCK; |
| 458 | else |
| 459 | result = L2CAP_CR_BAD_PSM; |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 460 | l2cap_state_change(chan, BT_DISCONN); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 461 | |
| 462 | rsp.scid = cpu_to_le16(chan->dcid); |
| 463 | rsp.dcid = cpu_to_le16(chan->scid); |
| 464 | rsp.result = cpu_to_le16(result); |
| 465 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 466 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, |
| 467 | sizeof(rsp), &rsp); |
| 468 | } |
| 469 | |
| 470 | l2cap_chan_del(chan, reason); |
| 471 | break; |
| 472 | |
| 473 | case BT_CONNECT: |
| 474 | case BT_DISCONN: |
| 475 | l2cap_chan_del(chan, reason); |
| 476 | break; |
| 477 | |
| 478 | default: |
| 479 | sock_set_flag(sk, SOCK_ZAPPED); |
| 480 | break; |
| 481 | } |
| 482 | } |
| 483 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 484 | static inline u8 l2cap_get_auth_type(struct l2cap_chan *chan) |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 485 | { |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 486 | if (chan->chan_type == L2CAP_CHAN_RAW) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 487 | switch (chan->sec_level) { |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 488 | case BT_SECURITY_HIGH: |
| 489 | return HCI_AT_DEDICATED_BONDING_MITM; |
| 490 | case BT_SECURITY_MEDIUM: |
| 491 | return HCI_AT_DEDICATED_BONDING; |
| 492 | default: |
| 493 | return HCI_AT_NO_BONDING; |
| 494 | } |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 495 | } else if (chan->psm == cpu_to_le16(0x0001)) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 496 | if (chan->sec_level == BT_SECURITY_LOW) |
| 497 | chan->sec_level = BT_SECURITY_SDP; |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 498 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 499 | if (chan->sec_level == BT_SECURITY_HIGH) |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 500 | return HCI_AT_NO_BONDING_MITM; |
| 501 | else |
| 502 | return HCI_AT_NO_BONDING; |
| 503 | } else { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 504 | switch (chan->sec_level) { |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 505 | case BT_SECURITY_HIGH: |
| 506 | return HCI_AT_GENERAL_BONDING_MITM; |
| 507 | case BT_SECURITY_MEDIUM: |
| 508 | return HCI_AT_GENERAL_BONDING; |
| 509 | default: |
| 510 | return HCI_AT_NO_BONDING; |
| 511 | } |
| 512 | } |
| 513 | } |
| 514 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 515 | /* Service level security */ |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 516 | static inline int l2cap_check_security(struct l2cap_chan *chan) |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 517 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 518 | struct l2cap_conn *conn = chan->conn; |
Marcel Holtmann | 0684e5f | 2009-02-09 02:48:38 +0100 | [diff] [blame] | 519 | __u8 auth_type; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 520 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 521 | auth_type = l2cap_get_auth_type(chan); |
Marcel Holtmann | 0684e5f | 2009-02-09 02:48:38 +0100 | [diff] [blame] | 522 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 523 | return hci_conn_security(conn->hcon, chan->sec_level, auth_type); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 524 | } |
| 525 | |
Johannes Berg | b5ad8b7 | 2011-06-01 08:54:45 +0200 | [diff] [blame] | 526 | static u8 l2cap_get_ident(struct l2cap_conn *conn) |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 527 | { |
| 528 | u8 id; |
| 529 | |
| 530 | /* Get next available identificator. |
| 531 | * 1 - 128 are used by kernel. |
| 532 | * 129 - 199 are reserved. |
| 533 | * 200 - 254 are used by utilities like l2ping, etc. |
| 534 | */ |
| 535 | |
| 536 | spin_lock_bh(&conn->lock); |
| 537 | |
| 538 | if (++conn->tx_ident > 128) |
| 539 | conn->tx_ident = 1; |
| 540 | |
| 541 | id = conn->tx_ident; |
| 542 | |
| 543 | spin_unlock_bh(&conn->lock); |
| 544 | |
| 545 | return id; |
| 546 | } |
| 547 | |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 548 | 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] | 549 | { |
| 550 | struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 551 | u8 flags; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 552 | |
| 553 | BT_DBG("code 0x%2.2x", code); |
| 554 | |
| 555 | if (!skb) |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 556 | return; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 557 | |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 558 | if (lmp_no_flush_capable(conn->hcon->hdev)) |
| 559 | flags = ACL_START_NO_FLUSH; |
| 560 | else |
| 561 | flags = ACL_START; |
| 562 | |
Jaikumar Ganesh | 14b12d0 | 2011-05-23 18:06:04 -0700 | [diff] [blame] | 563 | bt_cb(skb)->force_active = BT_POWER_FORCE_ACTIVE_ON; |
| 564 | |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 565 | hci_send_acl(conn->hcon, skb, flags); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 566 | } |
| 567 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 568 | static inline void l2cap_send_sframe(struct l2cap_chan *chan, u16 control) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 569 | { |
| 570 | struct sk_buff *skb; |
| 571 | struct l2cap_hdr *lh; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 572 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 573 | int count, hlen = L2CAP_HDR_SIZE + 2; |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 574 | u8 flags; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 575 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 576 | if (chan->state != BT_CONNECTED) |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 577 | return; |
| 578 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 579 | if (chan->fcs == L2CAP_FCS_CRC16) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 580 | hlen += 2; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 581 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 582 | BT_DBG("chan %p, control 0x%2.2x", chan, control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 583 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 584 | count = min_t(unsigned int, conn->mtu, hlen); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 585 | control |= L2CAP_CTRL_FRAME_TYPE; |
| 586 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 587 | if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state)) |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 588 | control |= L2CAP_CTRL_FINAL; |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 589 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 590 | if (test_and_clear_bit(CONN_SEND_PBIT, &chan->conn_state)) |
Gustavo F. Padovan | f0946cc | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 591 | control |= L2CAP_CTRL_POLL; |
Gustavo F. Padovan | f0946cc | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 592 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 593 | skb = bt_skb_alloc(count, GFP_ATOMIC); |
| 594 | if (!skb) |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 595 | return; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 596 | |
| 597 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 598 | lh->len = cpu_to_le16(hlen - L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 599 | lh->cid = cpu_to_le16(chan->dcid); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 600 | put_unaligned_le16(control, skb_put(skb, 2)); |
| 601 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 602 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 603 | u16 fcs = crc16(0, (u8 *)lh, count - 2); |
| 604 | put_unaligned_le16(fcs, skb_put(skb, 2)); |
| 605 | } |
| 606 | |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 607 | if (lmp_no_flush_capable(conn->hcon->hdev)) |
| 608 | flags = ACL_START_NO_FLUSH; |
| 609 | else |
| 610 | flags = ACL_START; |
| 611 | |
Jaikumar Ganesh | 14b12d0 | 2011-05-23 18:06:04 -0700 | [diff] [blame] | 612 | bt_cb(skb)->force_active = chan->force_active; |
| 613 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 614 | hci_send_acl(chan->conn->hcon, skb, flags); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 615 | } |
| 616 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 617 | static inline void l2cap_send_rr_or_rnr(struct l2cap_chan *chan, u16 control) |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 618 | { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 619 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 620 | control |= L2CAP_SUPER_RCV_NOT_READY; |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 621 | set_bit(CONN_RNR_SENT, &chan->conn_state); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 622 | } else |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 623 | control |= L2CAP_SUPER_RCV_READY; |
| 624 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 625 | control |= chan->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
Gustavo F. Padovan | 2ab25cd | 2009-10-03 02:34:40 -0300 | [diff] [blame] | 626 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 627 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 628 | } |
| 629 | |
Gustavo F. Padovan | b445003 | 2011-04-12 18:15:09 -0300 | [diff] [blame] | 630 | static inline int __l2cap_no_conn_pending(struct l2cap_chan *chan) |
Andrei Emeltchenko | e501d05 | 2010-07-08 12:14:41 +0300 | [diff] [blame] | 631 | { |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 632 | return !test_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Andrei Emeltchenko | e501d05 | 2010-07-08 12:14:41 +0300 | [diff] [blame] | 633 | } |
| 634 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 635 | static void l2cap_do_start(struct l2cap_chan *chan) |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 636 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 637 | struct l2cap_conn *conn = chan->conn; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 638 | |
| 639 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) { |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 640 | if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)) |
| 641 | return; |
| 642 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 643 | if (l2cap_check_security(chan) && |
| 644 | __l2cap_no_conn_pending(chan)) { |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 645 | struct l2cap_conn_req req; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 646 | req.scid = cpu_to_le16(chan->scid); |
| 647 | req.psm = chan->psm; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 648 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 649 | chan->ident = l2cap_get_ident(conn); |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 650 | set_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 651 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 652 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_REQ, |
| 653 | sizeof(req), &req); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 654 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 655 | } else { |
| 656 | struct l2cap_info_req req; |
| 657 | req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 658 | |
| 659 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; |
| 660 | conn->info_ident = l2cap_get_ident(conn); |
| 661 | |
| 662 | mod_timer(&conn->info_timer, jiffies + |
| 663 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); |
| 664 | |
| 665 | l2cap_send_cmd(conn, conn->info_ident, |
| 666 | L2CAP_INFO_REQ, sizeof(req), &req); |
| 667 | } |
| 668 | } |
| 669 | |
Gustavo F. Padovan | cf6c2c0 | 2010-06-07 20:54:45 -0300 | [diff] [blame] | 670 | static inline int l2cap_mode_supported(__u8 mode, __u32 feat_mask) |
| 671 | { |
| 672 | u32 local_feat_mask = l2cap_feat_mask; |
Gustavo F. Padovan | d1c4a17 | 2010-07-18 16:25:54 -0300 | [diff] [blame] | 673 | if (!disable_ertm) |
Gustavo F. Padovan | cf6c2c0 | 2010-06-07 20:54:45 -0300 | [diff] [blame] | 674 | local_feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING; |
| 675 | |
| 676 | switch (mode) { |
| 677 | case L2CAP_MODE_ERTM: |
| 678 | return L2CAP_FEAT_ERTM & feat_mask & local_feat_mask; |
| 679 | case L2CAP_MODE_STREAMING: |
| 680 | return L2CAP_FEAT_STREAMING & feat_mask & local_feat_mask; |
| 681 | default: |
| 682 | return 0x00; |
| 683 | } |
| 684 | } |
| 685 | |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 686 | 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] | 687 | { |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 688 | struct sock *sk; |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 689 | struct l2cap_disconn_req req; |
| 690 | |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 691 | if (!conn) |
| 692 | return; |
| 693 | |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 694 | sk = chan->sk; |
| 695 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 696 | if (chan->mode == L2CAP_MODE_ERTM) { |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 697 | __clear_retrans_timer(chan); |
| 698 | __clear_monitor_timer(chan); |
| 699 | __clear_ack_timer(chan); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 700 | } |
| 701 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 702 | req.dcid = cpu_to_le16(chan->dcid); |
| 703 | req.scid = cpu_to_le16(chan->scid); |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 704 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
| 705 | L2CAP_DISCONN_REQ, sizeof(req), &req); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 706 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 707 | l2cap_state_change(chan, BT_DISCONN); |
Gustavo F. Padovan | 9b108fc | 2010-05-20 16:21:53 -0300 | [diff] [blame] | 708 | sk->sk_err = err; |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 709 | } |
| 710 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | /* ---- L2CAP connections ---- */ |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 712 | static void l2cap_conn_start(struct l2cap_conn *conn) |
| 713 | { |
Gustavo F. Padovan | 820ffdb | 2011-04-01 00:35:21 -0300 | [diff] [blame] | 714 | struct l2cap_chan *chan, *tmp; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 715 | |
| 716 | BT_DBG("conn %p", conn); |
| 717 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 718 | read_lock(&conn->chan_lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 719 | |
Gustavo F. Padovan | 820ffdb | 2011-04-01 00:35:21 -0300 | [diff] [blame] | 720 | list_for_each_entry_safe(chan, tmp, &conn->chan_l, list) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 721 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 722 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 723 | bh_lock_sock(sk); |
| 724 | |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 725 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 726 | bh_unlock_sock(sk); |
| 727 | continue; |
| 728 | } |
| 729 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 730 | if (chan->state == BT_CONNECT) { |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 731 | struct l2cap_conn_req req; |
Gustavo F. Padovan | cf6c2c0 | 2010-06-07 20:54:45 -0300 | [diff] [blame] | 732 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 733 | if (!l2cap_check_security(chan) || |
Gustavo F. Padovan | b445003 | 2011-04-12 18:15:09 -0300 | [diff] [blame] | 734 | !__l2cap_no_conn_pending(chan)) { |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 735 | bh_unlock_sock(sk); |
| 736 | continue; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 737 | } |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 738 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 739 | if (!l2cap_mode_supported(chan->mode, conn->feat_mask) |
| 740 | && test_bit(CONF_STATE2_DEVICE, |
| 741 | &chan->conf_state)) { |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 742 | /* l2cap_chan_close() calls list_del(chan) |
Gustavo F. Padovan | 820ffdb | 2011-04-01 00:35:21 -0300 | [diff] [blame] | 743 | * so release the lock */ |
| 744 | read_unlock_bh(&conn->chan_lock); |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 745 | l2cap_chan_close(chan, ECONNRESET); |
Gustavo F. Padovan | 820ffdb | 2011-04-01 00:35:21 -0300 | [diff] [blame] | 746 | read_lock_bh(&conn->chan_lock); |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 747 | bh_unlock_sock(sk); |
| 748 | continue; |
| 749 | } |
| 750 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 751 | req.scid = cpu_to_le16(chan->scid); |
| 752 | req.psm = chan->psm; |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 753 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 754 | chan->ident = l2cap_get_ident(conn); |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 755 | set_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 756 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 757 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_REQ, |
| 758 | sizeof(req), &req); |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 759 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 760 | } else if (chan->state == BT_CONNECT2) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 761 | struct l2cap_conn_rsp rsp; |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 762 | char buf[128]; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 763 | rsp.scid = cpu_to_le16(chan->dcid); |
| 764 | rsp.dcid = cpu_to_le16(chan->scid); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 765 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 766 | if (l2cap_check_security(chan)) { |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 767 | if (bt_sk(sk)->defer_setup) { |
| 768 | struct sock *parent = bt_sk(sk)->parent; |
| 769 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); |
| 770 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHOR_PEND); |
| 771 | parent->sk_data_ready(parent, 0); |
| 772 | |
| 773 | } else { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 774 | l2cap_state_change(chan, BT_CONFIG); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 775 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); |
| 776 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 777 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 778 | } else { |
| 779 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); |
| 780 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHEN_PEND); |
| 781 | } |
| 782 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 783 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, |
| 784 | sizeof(rsp), &rsp); |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 785 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 786 | if (test_bit(CONF_REQ_SENT, &chan->conf_state) || |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 787 | rsp.result != L2CAP_CR_SUCCESS) { |
| 788 | bh_unlock_sock(sk); |
| 789 | continue; |
| 790 | } |
| 791 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 792 | set_bit(CONF_REQ_SENT, &chan->conf_state); |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 793 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 794 | l2cap_build_conf_req(chan, buf), buf); |
| 795 | chan->num_conf_req++; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 796 | } |
| 797 | |
| 798 | bh_unlock_sock(sk); |
| 799 | } |
| 800 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 801 | read_unlock(&conn->chan_lock); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 802 | } |
| 803 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 804 | /* Find socket with cid and source bdaddr. |
| 805 | * Returns closest match, locked. |
| 806 | */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 807 | 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] | 808 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 809 | struct l2cap_chan *c, *c1 = NULL; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 810 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 811 | read_lock(&chan_list_lock); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 812 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 813 | list_for_each_entry(c, &chan_list, global_l) { |
| 814 | struct sock *sk = c->sk; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 815 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 816 | if (state && c->state != state) |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 817 | continue; |
| 818 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 819 | if (c->scid == cid) { |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 820 | /* Exact match. */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 821 | if (!bacmp(&bt_sk(sk)->src, src)) { |
| 822 | read_unlock(&chan_list_lock); |
| 823 | return c; |
| 824 | } |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 825 | |
| 826 | /* Closest match */ |
| 827 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 828 | c1 = c; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 829 | } |
| 830 | } |
Gustavo F. Padovan | 280f294 | 2011-04-13 19:01:22 -0300 | [diff] [blame] | 831 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 832 | read_unlock(&chan_list_lock); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 833 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 834 | return c1; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 835 | } |
| 836 | |
| 837 | static void l2cap_le_conn_ready(struct l2cap_conn *conn) |
| 838 | { |
Gustavo F. Padovan | c916fbe | 2011-04-04 16:00:55 -0300 | [diff] [blame] | 839 | struct sock *parent, *sk; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 840 | struct l2cap_chan *chan, *pchan; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 841 | |
| 842 | BT_DBG(""); |
| 843 | |
| 844 | /* Check if we have socket listening on cid */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 845 | pchan = l2cap_global_chan_by_scid(BT_LISTEN, L2CAP_CID_LE_DATA, |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 846 | conn->src); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 847 | if (!pchan) |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 848 | return; |
| 849 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 850 | parent = pchan->sk; |
| 851 | |
Gustavo F. Padovan | 62f3a2c | 2011-04-14 18:34:34 -0300 | [diff] [blame] | 852 | bh_lock_sock(parent); |
| 853 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 854 | /* Check for backlog size */ |
| 855 | if (sk_acceptq_is_full(parent)) { |
| 856 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
| 857 | goto clean; |
| 858 | } |
| 859 | |
Gustavo F. Padovan | 80808e4 | 2011-05-16 17:24:37 -0300 | [diff] [blame] | 860 | chan = pchan->ops->new_connection(pchan->data); |
| 861 | if (!chan) |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 862 | goto clean; |
| 863 | |
Gustavo F. Padovan | 80808e4 | 2011-05-16 17:24:37 -0300 | [diff] [blame] | 864 | sk = chan->sk; |
Gustavo F. Padovan | 5d41ce1 | 2011-04-08 15:40:02 -0300 | [diff] [blame] | 865 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 866 | write_lock_bh(&conn->chan_lock); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 867 | |
| 868 | hci_conn_hold(conn->hcon); |
| 869 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 870 | bacpy(&bt_sk(sk)->src, conn->src); |
| 871 | bacpy(&bt_sk(sk)->dst, conn->dst); |
| 872 | |
Gustavo F. Padovan | d101024 | 2011-03-25 00:39:48 -0300 | [diff] [blame] | 873 | bt_accept_enqueue(parent, sk); |
| 874 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 875 | __l2cap_chan_add(conn, chan); |
| 876 | |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 877 | __set_chan_timer(chan, sk->sk_sndtimeo); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 878 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 879 | l2cap_state_change(chan, BT_CONNECTED); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 880 | parent->sk_data_ready(parent, 0); |
| 881 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 882 | write_unlock_bh(&conn->chan_lock); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 883 | |
| 884 | clean: |
| 885 | bh_unlock_sock(parent); |
| 886 | } |
| 887 | |
Vinicius Costa Gomes | f1cb9af | 2011-01-26 21:42:57 -0300 | [diff] [blame] | 888 | static void l2cap_chan_ready(struct sock *sk) |
| 889 | { |
| 890 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
| 891 | struct sock *parent = bt_sk(sk)->parent; |
| 892 | |
| 893 | BT_DBG("sk %p, parent %p", sk, parent); |
| 894 | |
| 895 | chan->conf_state = 0; |
| 896 | __clear_chan_timer(chan); |
| 897 | |
Vinicius Costa Gomes | 43f3dc4 | 2011-06-20 18:53:18 -0300 | [diff] [blame] | 898 | l2cap_state_change(chan, BT_CONNECTED); |
Vinicius Costa Gomes | f1cb9af | 2011-01-26 21:42:57 -0300 | [diff] [blame] | 899 | sk->sk_state_change(sk); |
| 900 | |
| 901 | if (parent) |
| 902 | parent->sk_data_ready(parent, 0); |
| 903 | } |
| 904 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 905 | static void l2cap_conn_ready(struct l2cap_conn *conn) |
| 906 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 907 | struct l2cap_chan *chan; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 908 | |
| 909 | BT_DBG("conn %p", conn); |
| 910 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 911 | if (!conn->hcon->out && conn->hcon->type == LE_LINK) |
| 912 | l2cap_le_conn_ready(conn); |
| 913 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 914 | read_lock(&conn->chan_lock); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 915 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 916 | list_for_each_entry(chan, &conn->chan_l, list) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 917 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 918 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 919 | bh_lock_sock(sk); |
| 920 | |
Vinicius Costa Gomes | 6312845 | 2011-06-17 22:46:26 -0300 | [diff] [blame] | 921 | if (conn->hcon->type == LE_LINK) { |
Anderson Briglia | b501d6a | 2011-06-07 18:46:31 -0300 | [diff] [blame] | 922 | if (smp_conn_security(conn, chan->sec_level)) |
Vinicius Costa Gomes | f1cb9af | 2011-01-26 21:42:57 -0300 | [diff] [blame] | 923 | l2cap_chan_ready(sk); |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 924 | |
Vinicius Costa Gomes | 6312845 | 2011-06-17 22:46:26 -0300 | [diff] [blame] | 925 | } else if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 926 | __clear_chan_timer(chan); |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 927 | l2cap_state_change(chan, BT_CONNECTED); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 928 | sk->sk_state_change(sk); |
Anderson Briglia | b501d6a | 2011-06-07 18:46:31 -0300 | [diff] [blame] | 929 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 930 | } else if (chan->state == BT_CONNECT) |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 931 | l2cap_do_start(chan); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 932 | |
| 933 | bh_unlock_sock(sk); |
| 934 | } |
| 935 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 936 | read_unlock(&conn->chan_lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 937 | } |
| 938 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 939 | /* Notify sockets that we cannot guaranty reliability anymore */ |
| 940 | static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) |
| 941 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 942 | struct l2cap_chan *chan; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 943 | |
| 944 | BT_DBG("conn %p", conn); |
| 945 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 946 | read_lock(&conn->chan_lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 947 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 948 | list_for_each_entry(chan, &conn->chan_l, list) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 949 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 950 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 951 | if (chan->force_reliable) |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 952 | sk->sk_err = err; |
| 953 | } |
| 954 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 955 | read_unlock(&conn->chan_lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 956 | } |
| 957 | |
| 958 | static void l2cap_info_timeout(unsigned long arg) |
| 959 | { |
| 960 | struct l2cap_conn *conn = (void *) arg; |
| 961 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 962 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 963 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 964 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 965 | l2cap_conn_start(conn); |
| 966 | } |
| 967 | |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 968 | static void l2cap_conn_del(struct hci_conn *hcon, int err) |
| 969 | { |
| 970 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 971 | struct l2cap_chan *chan, *l; |
| 972 | struct sock *sk; |
| 973 | |
| 974 | if (!conn) |
| 975 | return; |
| 976 | |
| 977 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); |
| 978 | |
| 979 | kfree_skb(conn->rx_skb); |
| 980 | |
| 981 | /* Kill channels */ |
| 982 | list_for_each_entry_safe(chan, l, &conn->chan_l, list) { |
| 983 | sk = chan->sk; |
| 984 | bh_lock_sock(sk); |
| 985 | l2cap_chan_del(chan, err); |
| 986 | bh_unlock_sock(sk); |
| 987 | chan->ops->close(chan->data); |
| 988 | } |
| 989 | |
| 990 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) |
| 991 | del_timer_sync(&conn->info_timer); |
| 992 | |
| 993 | if (test_bit(HCI_CONN_ENCRYPT_PEND, &hcon->pend)) |
| 994 | del_timer(&conn->security_timer); |
| 995 | |
| 996 | hcon->l2cap_data = NULL; |
| 997 | kfree(conn); |
| 998 | } |
| 999 | |
| 1000 | static void security_timeout(unsigned long arg) |
| 1001 | { |
| 1002 | struct l2cap_conn *conn = (void *) arg; |
| 1003 | |
| 1004 | l2cap_conn_del(conn->hcon, ETIMEDOUT); |
| 1005 | } |
| 1006 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) |
| 1008 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 1009 | struct l2cap_conn *conn = hcon->l2cap_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 1011 | if (conn || status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | return conn; |
| 1013 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 1014 | conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC); |
| 1015 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | |
| 1018 | hcon->l2cap_data = conn; |
| 1019 | conn->hcon = hcon; |
| 1020 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 1021 | BT_DBG("hcon %p conn %p", hcon, conn); |
| 1022 | |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 1023 | if (hcon->hdev->le_mtu && hcon->type == LE_LINK) |
| 1024 | conn->mtu = hcon->hdev->le_mtu; |
| 1025 | else |
| 1026 | conn->mtu = hcon->hdev->acl_mtu; |
| 1027 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | conn->src = &hcon->hdev->bdaddr; |
| 1029 | conn->dst = &hcon->dst; |
| 1030 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1031 | conn->feat_mask = 0; |
| 1032 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | spin_lock_init(&conn->lock); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1034 | rwlock_init(&conn->chan_lock); |
| 1035 | |
| 1036 | INIT_LIST_HEAD(&conn->chan_l); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1038 | if (hcon->type == LE_LINK) |
| 1039 | setup_timer(&conn->security_timer, security_timeout, |
| 1040 | (unsigned long) conn); |
| 1041 | else |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1042 | setup_timer(&conn->info_timer, l2cap_info_timeout, |
Dave Young | 45054dc | 2009-10-18 20:28:30 +0000 | [diff] [blame] | 1043 | (unsigned long) conn); |
| 1044 | |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 1045 | conn->disc_reason = 0x13; |
| 1046 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | return conn; |
| 1048 | } |
| 1049 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1050 | 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] | 1051 | { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1052 | write_lock_bh(&conn->chan_lock); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1053 | __l2cap_chan_add(conn, chan); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1054 | write_unlock_bh(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | } |
| 1056 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | /* ---- Socket interface ---- */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | |
| 1059 | /* Find socket with psm and source bdaddr. |
| 1060 | * Returns closest match. |
| 1061 | */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1062 | 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] | 1063 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1064 | struct l2cap_chan *c, *c1 = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1066 | read_lock(&chan_list_lock); |
Gustavo F. Padovan | e0f0cb5 | 2010-11-01 18:43:53 +0000 | [diff] [blame] | 1067 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1068 | list_for_each_entry(c, &chan_list, global_l) { |
| 1069 | struct sock *sk = c->sk; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1070 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1071 | if (state && c->state != state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | continue; |
| 1073 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1074 | if (c->psm == psm) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | /* Exact match. */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1076 | if (!bacmp(&bt_sk(sk)->src, src)) { |
Johannes Berg | a7567b2 | 2011-06-01 08:29:54 +0200 | [diff] [blame] | 1077 | read_unlock(&chan_list_lock); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1078 | return c; |
| 1079 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | |
| 1081 | /* Closest match */ |
| 1082 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1083 | c1 = c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | } |
| 1085 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1087 | read_unlock(&chan_list_lock); |
Gustavo F. Padovan | e0f0cb5 | 2010-11-01 18:43:53 +0000 | [diff] [blame] | 1088 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1089 | return c1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1090 | } |
| 1091 | |
Gustavo F. Padovan | 77a74c7 | 2011-04-12 18:17:14 -0300 | [diff] [blame] | 1092 | int l2cap_chan_connect(struct l2cap_chan *chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | { |
Gustavo F. Padovan | 5d41ce1 | 2011-04-08 15:40:02 -0300 | [diff] [blame] | 1094 | struct sock *sk = chan->sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | bdaddr_t *src = &bt_sk(sk)->src; |
| 1096 | bdaddr_t *dst = &bt_sk(sk)->dst; |
| 1097 | struct l2cap_conn *conn; |
| 1098 | struct hci_conn *hcon; |
| 1099 | struct hci_dev *hdev; |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 1100 | __u8 auth_type; |
Marcel Holtmann | 44d0e48 | 2009-04-20 07:09:16 +0200 | [diff] [blame] | 1101 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1103 | 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] | 1104 | chan->psm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 1106 | hdev = hci_get_route(dst, src); |
| 1107 | if (!hdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | return -EHOSTUNREACH; |
| 1109 | |
| 1110 | hci_dev_lock_bh(hdev); |
| 1111 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1112 | auth_type = l2cap_get_auth_type(chan); |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 1113 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1114 | if (chan->dcid == L2CAP_CID_LE_DATA) |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 1115 | hcon = hci_connect(hdev, LE_LINK, dst, |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1116 | chan->sec_level, auth_type); |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 1117 | else |
| 1118 | hcon = hci_connect(hdev, ACL_LINK, dst, |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1119 | chan->sec_level, auth_type); |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 1120 | |
Ville Tervo | 30e7627 | 2011-02-22 16:10:53 -0300 | [diff] [blame] | 1121 | if (IS_ERR(hcon)) { |
| 1122 | err = PTR_ERR(hcon); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1123 | goto done; |
Ville Tervo | 30e7627 | 2011-02-22 16:10:53 -0300 | [diff] [blame] | 1124 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | |
| 1126 | conn = l2cap_conn_add(hcon, 0); |
| 1127 | if (!conn) { |
| 1128 | hci_conn_put(hcon); |
Ville Tervo | 30e7627 | 2011-02-22 16:10:53 -0300 | [diff] [blame] | 1129 | err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | goto done; |
| 1131 | } |
| 1132 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | /* Update source addr of the socket */ |
| 1134 | bacpy(src, conn->src); |
| 1135 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1136 | l2cap_chan_add(conn, chan); |
| 1137 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1138 | l2cap_state_change(chan, BT_CONNECT); |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 1139 | __set_chan_timer(chan, sk->sk_sndtimeo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | |
| 1141 | if (hcon->state == BT_CONNECTED) { |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 1142 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 1143 | __clear_chan_timer(chan); |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1144 | if (l2cap_check_security(chan)) |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1145 | l2cap_state_change(chan, BT_CONNECTED); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1146 | } else |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 1147 | l2cap_do_start(chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | } |
| 1149 | |
Ville Tervo | 30e7627 | 2011-02-22 16:10:53 -0300 | [diff] [blame] | 1150 | err = 0; |
| 1151 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | done: |
| 1153 | hci_dev_unlock_bh(hdev); |
| 1154 | hci_dev_put(hdev); |
| 1155 | return err; |
| 1156 | } |
| 1157 | |
Gustavo F. Padovan | dcba0db | 2011-02-04 03:08:36 -0200 | [diff] [blame] | 1158 | int __l2cap_wait_ack(struct sock *sk) |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1159 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1160 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1161 | DECLARE_WAITQUEUE(wait, current); |
| 1162 | int err = 0; |
| 1163 | int timeo = HZ/5; |
| 1164 | |
Marcel Holtmann | 2b0b05d | 2010-05-10 11:33:10 +0200 | [diff] [blame] | 1165 | add_wait_queue(sk_sleep(sk), &wait); |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1166 | while ((chan->unacked_frames > 0 && chan->conn)) { |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1167 | set_current_state(TASK_INTERRUPTIBLE); |
| 1168 | |
| 1169 | if (!timeo) |
| 1170 | timeo = HZ/5; |
| 1171 | |
| 1172 | if (signal_pending(current)) { |
| 1173 | err = sock_intr_errno(timeo); |
| 1174 | break; |
| 1175 | } |
| 1176 | |
| 1177 | release_sock(sk); |
| 1178 | timeo = schedule_timeout(timeo); |
| 1179 | lock_sock(sk); |
| 1180 | |
| 1181 | err = sock_error(sk); |
| 1182 | if (err) |
| 1183 | break; |
| 1184 | } |
| 1185 | set_current_state(TASK_RUNNING); |
Marcel Holtmann | 2b0b05d | 2010-05-10 11:33:10 +0200 | [diff] [blame] | 1186 | remove_wait_queue(sk_sleep(sk), &wait); |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1187 | return err; |
| 1188 | } |
| 1189 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1190 | static void l2cap_monitor_timeout(unsigned long arg) |
| 1191 | { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1192 | struct l2cap_chan *chan = (void *) arg; |
| 1193 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1194 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1195 | BT_DBG("chan %p", chan); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 1196 | |
Gustavo F. Padovan | e686219 | 2009-08-24 00:45:19 -0300 | [diff] [blame] | 1197 | bh_lock_sock(sk); |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1198 | if (chan->retry_count >= chan->remote_max_tx) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1199 | l2cap_send_disconn_req(chan->conn, chan, ECONNABORTED); |
Andrei Emeltchenko | b13f586 | 2009-12-15 11:38:04 +0200 | [diff] [blame] | 1200 | bh_unlock_sock(sk); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1201 | return; |
| 1202 | } |
| 1203 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1204 | chan->retry_count++; |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 1205 | __set_monitor_timer(chan); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1206 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1207 | l2cap_send_rr_or_rnr(chan, L2CAP_CTRL_POLL); |
Gustavo F. Padovan | e686219 | 2009-08-24 00:45:19 -0300 | [diff] [blame] | 1208 | bh_unlock_sock(sk); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1209 | } |
| 1210 | |
| 1211 | static void l2cap_retrans_timeout(unsigned long arg) |
| 1212 | { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1213 | struct l2cap_chan *chan = (void *) arg; |
| 1214 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1215 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 1216 | BT_DBG("chan %p", chan); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 1217 | |
Gustavo F. Padovan | e686219 | 2009-08-24 00:45:19 -0300 | [diff] [blame] | 1218 | bh_lock_sock(sk); |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1219 | chan->retry_count = 1; |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 1220 | __set_monitor_timer(chan); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1221 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1222 | set_bit(CONN_WAIT_F, &chan->conn_state); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1223 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1224 | l2cap_send_rr_or_rnr(chan, L2CAP_CTRL_POLL); |
Gustavo F. Padovan | e686219 | 2009-08-24 00:45:19 -0300 | [diff] [blame] | 1225 | bh_unlock_sock(sk); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1226 | } |
| 1227 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1228 | static void l2cap_drop_acked_frames(struct l2cap_chan *chan) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1229 | { |
| 1230 | struct sk_buff *skb; |
| 1231 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1232 | while ((skb = skb_peek(&chan->tx_q)) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1233 | chan->unacked_frames) { |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1234 | if (bt_cb(skb)->tx_seq == chan->expected_ack_seq) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1235 | break; |
| 1236 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1237 | skb = skb_dequeue(&chan->tx_q); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1238 | kfree_skb(skb); |
| 1239 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1240 | chan->unacked_frames--; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1241 | } |
| 1242 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1243 | if (!chan->unacked_frames) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 1244 | __clear_retrans_timer(chan); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1245 | } |
| 1246 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1247 | 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] | 1248 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1249 | struct hci_conn *hcon = chan->conn->hcon; |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 1250 | u16 flags; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1251 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1252 | 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] | 1253 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1254 | if (!chan->flushable && lmp_no_flush_capable(hcon->hdev)) |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 1255 | flags = ACL_START_NO_FLUSH; |
| 1256 | else |
| 1257 | flags = ACL_START; |
| 1258 | |
Jaikumar Ganesh | 14b12d0 | 2011-05-23 18:06:04 -0700 | [diff] [blame] | 1259 | bt_cb(skb)->force_active = chan->force_active; |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 1260 | hci_send_acl(hcon, skb, flags); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1261 | } |
| 1262 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1263 | void l2cap_streaming_send(struct l2cap_chan *chan) |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1264 | { |
Gustavo F. Padovan | ccbb84a | 2010-08-30 18:44:44 -0300 | [diff] [blame] | 1265 | struct sk_buff *skb; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1266 | u16 control, fcs; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1267 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1268 | while ((skb = skb_dequeue(&chan->tx_q))) { |
Gustavo F. Padovan | ccbb84a | 2010-08-30 18:44:44 -0300 | [diff] [blame] | 1269 | control = get_unaligned_le16(skb->data + L2CAP_HDR_SIZE); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1270 | control |= chan->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT; |
Gustavo F. Padovan | ccbb84a | 2010-08-30 18:44:44 -0300 | [diff] [blame] | 1271 | put_unaligned_le16(control, skb->data + L2CAP_HDR_SIZE); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1272 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1273 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Gustavo F. Padovan | ccbb84a | 2010-08-30 18:44:44 -0300 | [diff] [blame] | 1274 | fcs = crc16(0, (u8 *)skb->data, skb->len - 2); |
| 1275 | put_unaligned_le16(fcs, skb->data + skb->len - 2); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1276 | } |
| 1277 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1278 | l2cap_do_send(chan, skb); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1279 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1280 | chan->next_tx_seq = (chan->next_tx_seq + 1) % 64; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1281 | } |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1282 | } |
| 1283 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1284 | static void l2cap_retransmit_one_frame(struct l2cap_chan *chan, u8 tx_seq) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1285 | { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1286 | struct sk_buff *skb, *tx_skb; |
| 1287 | u16 control, fcs; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1288 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1289 | skb = skb_peek(&chan->tx_q); |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1290 | if (!skb) |
| 1291 | return; |
| 1292 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1293 | do { |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1294 | if (bt_cb(skb)->tx_seq == tx_seq) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1295 | break; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1296 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1297 | if (skb_queue_is_last(&chan->tx_q, skb)) |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1298 | return; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1299 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1300 | } while ((skb = skb_queue_next(&chan->tx_q, skb))); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1301 | |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1302 | if (chan->remote_max_tx && |
| 1303 | bt_cb(skb)->retries == chan->remote_max_tx) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1304 | l2cap_send_disconn_req(chan->conn, chan, ECONNABORTED); |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1305 | return; |
| 1306 | } |
| 1307 | |
| 1308 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
| 1309 | bt_cb(skb)->retries++; |
| 1310 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); |
Ruiyi Zhang | a429b51 | 2011-04-18 11:04:30 +0800 | [diff] [blame] | 1311 | control &= L2CAP_CTRL_SAR; |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 1312 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1313 | if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state)) |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 1314 | control |= L2CAP_CTRL_FINAL; |
Gustavo F. Padovan | 95ffa97 | 2010-06-18 20:37:33 -0300 | [diff] [blame] | 1315 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1316 | control |= (chan->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT) |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1317 | | (tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 1318 | |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1319 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); |
| 1320 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1321 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1322 | fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2); |
| 1323 | put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2); |
| 1324 | } |
| 1325 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1326 | l2cap_do_send(chan, tx_skb); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1327 | } |
| 1328 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1329 | int l2cap_ertm_send(struct l2cap_chan *chan) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1330 | { |
| 1331 | struct sk_buff *skb, *tx_skb; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1332 | u16 control, fcs; |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1333 | int nsent = 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1334 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1335 | if (chan->state != BT_CONNECTED) |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 1336 | return -ENOTCONN; |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1337 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1338 | while ((skb = chan->tx_send_head) && (!l2cap_tx_window_full(chan))) { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1339 | |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1340 | if (chan->remote_max_tx && |
| 1341 | bt_cb(skb)->retries == chan->remote_max_tx) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1342 | l2cap_send_disconn_req(chan->conn, chan, ECONNABORTED); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1343 | break; |
| 1344 | } |
| 1345 | |
Andrei Emeltchenko | e420aba | 2009-12-23 13:07:14 +0200 | [diff] [blame] | 1346 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
| 1347 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1348 | bt_cb(skb)->retries++; |
| 1349 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1350 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); |
Gustavo F. Padovan | 95ffa97 | 2010-06-18 20:37:33 -0300 | [diff] [blame] | 1351 | control &= L2CAP_CTRL_SAR; |
| 1352 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1353 | if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state)) |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 1354 | control |= L2CAP_CTRL_FINAL; |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1355 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1356 | control |= (chan->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT) |
| 1357 | | (chan->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1358 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); |
| 1359 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1360 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1361 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1362 | fcs = crc16(0, (u8 *)skb->data, tx_skb->len - 2); |
| 1363 | put_unaligned_le16(fcs, skb->data + tx_skb->len - 2); |
| 1364 | } |
| 1365 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1366 | l2cap_do_send(chan, tx_skb); |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1367 | |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 1368 | __set_retrans_timer(chan); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1369 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1370 | bt_cb(skb)->tx_seq = chan->next_tx_seq; |
| 1371 | chan->next_tx_seq = (chan->next_tx_seq + 1) % 64; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1372 | |
Suraj Sumangala | 23e9fde | 2011-03-09 14:44:05 +0530 | [diff] [blame] | 1373 | if (bt_cb(skb)->retries == 1) |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1374 | chan->unacked_frames++; |
Suraj Sumangala | 23e9fde | 2011-03-09 14:44:05 +0530 | [diff] [blame] | 1375 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1376 | chan->frames_sent++; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1377 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1378 | if (skb_queue_is_last(&chan->tx_q, skb)) |
| 1379 | chan->tx_send_head = NULL; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1380 | else |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1381 | chan->tx_send_head = skb_queue_next(&chan->tx_q, skb); |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1382 | |
| 1383 | nsent++; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1384 | } |
| 1385 | |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1386 | return nsent; |
| 1387 | } |
| 1388 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1389 | static int l2cap_retransmit_frames(struct l2cap_chan *chan) |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1390 | { |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1391 | int ret; |
| 1392 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1393 | if (!skb_queue_empty(&chan->tx_q)) |
| 1394 | chan->tx_send_head = chan->tx_q.next; |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1395 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1396 | chan->next_tx_seq = chan->expected_ack_seq; |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1397 | ret = l2cap_ertm_send(chan); |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1398 | return ret; |
| 1399 | } |
| 1400 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1401 | static void l2cap_send_ack(struct l2cap_chan *chan) |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1402 | { |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1403 | u16 control = 0; |
| 1404 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1405 | control |= chan->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1406 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1407 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1408 | control |= L2CAP_SUPER_RCV_NOT_READY; |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1409 | set_bit(CONN_RNR_SENT, &chan->conn_state); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1410 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1411 | return; |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1412 | } |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1413 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1414 | if (l2cap_ertm_send(chan) > 0) |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1415 | return; |
| 1416 | |
| 1417 | control |= L2CAP_SUPER_RCV_READY; |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1418 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1419 | } |
| 1420 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1421 | static void l2cap_send_srejtail(struct l2cap_chan *chan) |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 1422 | { |
| 1423 | struct srej_list *tail; |
| 1424 | u16 control; |
| 1425 | |
| 1426 | control = L2CAP_SUPER_SELECT_REJECT; |
| 1427 | control |= L2CAP_CTRL_FINAL; |
| 1428 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 1429 | tail = list_entry((&chan->srej_l)->prev, struct srej_list, list); |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 1430 | control |= tail->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
| 1431 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1432 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 1433 | } |
| 1434 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1435 | 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] | 1436 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1437 | struct l2cap_conn *conn = l2cap_pi(sk)->chan->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1438 | struct sk_buff **frag; |
| 1439 | int err, sent = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1440 | |
Gustavo F. Padovan | 59203a2 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1441 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1442 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1443 | |
| 1444 | sent += count; |
| 1445 | len -= count; |
| 1446 | |
| 1447 | /* Continuation fragments (no L2CAP header) */ |
| 1448 | frag = &skb_shinfo(skb)->frag_list; |
| 1449 | while (len) { |
| 1450 | count = min_t(unsigned int, conn->mtu, len); |
| 1451 | |
| 1452 | *frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err); |
| 1453 | if (!*frag) |
Gustavo F. Padovan | 0175d62 | 2010-09-24 20:30:57 -0300 | [diff] [blame] | 1454 | return err; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1455 | if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) |
| 1456 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1457 | |
| 1458 | sent += count; |
| 1459 | len -= count; |
| 1460 | |
| 1461 | frag = &(*frag)->next; |
| 1462 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1463 | |
| 1464 | return sent; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1465 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1466 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1467 | 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] | 1468 | { |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1469 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1470 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1471 | struct sk_buff *skb; |
| 1472 | int err, count, hlen = L2CAP_HDR_SIZE + 2; |
| 1473 | struct l2cap_hdr *lh; |
| 1474 | |
| 1475 | BT_DBG("sk %p len %d", sk, (int)len); |
| 1476 | |
| 1477 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
| 1478 | skb = bt_skb_send_alloc(sk, count + hlen, |
| 1479 | msg->msg_flags & MSG_DONTWAIT, &err); |
| 1480 | if (!skb) |
Gustavo F. Padovan | 0175d62 | 2010-09-24 20:30:57 -0300 | [diff] [blame] | 1481 | return ERR_PTR(err); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1482 | |
| 1483 | /* Create L2CAP header */ |
| 1484 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1485 | lh->cid = cpu_to_le16(chan->dcid); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1486 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1487 | put_unaligned_le16(chan->psm, skb_put(skb, 2)); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1488 | |
| 1489 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); |
| 1490 | if (unlikely(err < 0)) { |
| 1491 | kfree_skb(skb); |
| 1492 | return ERR_PTR(err); |
| 1493 | } |
| 1494 | return skb; |
| 1495 | } |
| 1496 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1497 | 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] | 1498 | { |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1499 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1500 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1501 | struct sk_buff *skb; |
| 1502 | int err, count, hlen = L2CAP_HDR_SIZE; |
| 1503 | struct l2cap_hdr *lh; |
| 1504 | |
| 1505 | BT_DBG("sk %p len %d", sk, (int)len); |
| 1506 | |
| 1507 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
| 1508 | skb = bt_skb_send_alloc(sk, count + hlen, |
| 1509 | msg->msg_flags & MSG_DONTWAIT, &err); |
| 1510 | if (!skb) |
Gustavo F. Padovan | 0175d62 | 2010-09-24 20:30:57 -0300 | [diff] [blame] | 1511 | return ERR_PTR(err); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1512 | |
| 1513 | /* Create L2CAP header */ |
| 1514 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1515 | lh->cid = cpu_to_le16(chan->dcid); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1516 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); |
| 1517 | |
| 1518 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); |
| 1519 | if (unlikely(err < 0)) { |
| 1520 | kfree_skb(skb); |
| 1521 | return ERR_PTR(err); |
| 1522 | } |
| 1523 | return skb; |
| 1524 | } |
| 1525 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1526 | struct sk_buff *l2cap_create_iframe_pdu(struct l2cap_chan *chan, struct msghdr *msg, size_t len, u16 control, u16 sdulen) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1527 | { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1528 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1529 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1530 | struct sk_buff *skb; |
| 1531 | int err, count, hlen = L2CAP_HDR_SIZE + 2; |
| 1532 | struct l2cap_hdr *lh; |
| 1533 | |
| 1534 | BT_DBG("sk %p len %d", sk, (int)len); |
| 1535 | |
Gustavo F. Padovan | 0ee0d20 | 2010-05-01 16:15:41 -0300 | [diff] [blame] | 1536 | if (!conn) |
| 1537 | return ERR_PTR(-ENOTCONN); |
| 1538 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1539 | if (sdulen) |
| 1540 | hlen += 2; |
| 1541 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1542 | if (chan->fcs == L2CAP_FCS_CRC16) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1543 | hlen += 2; |
| 1544 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1545 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
| 1546 | skb = bt_skb_send_alloc(sk, count + hlen, |
| 1547 | msg->msg_flags & MSG_DONTWAIT, &err); |
| 1548 | if (!skb) |
Gustavo F. Padovan | 0175d62 | 2010-09-24 20:30:57 -0300 | [diff] [blame] | 1549 | return ERR_PTR(err); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1550 | |
| 1551 | /* Create L2CAP header */ |
| 1552 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1553 | lh->cid = cpu_to_le16(chan->dcid); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1554 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); |
| 1555 | put_unaligned_le16(control, skb_put(skb, 2)); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1556 | if (sdulen) |
| 1557 | put_unaligned_le16(sdulen, skb_put(skb, 2)); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1558 | |
| 1559 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); |
| 1560 | if (unlikely(err < 0)) { |
| 1561 | kfree_skb(skb); |
| 1562 | return ERR_PTR(err); |
| 1563 | } |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1564 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1565 | if (chan->fcs == L2CAP_FCS_CRC16) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1566 | put_unaligned_le16(0, skb_put(skb, 2)); |
| 1567 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1568 | bt_cb(skb)->retries = 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1569 | return skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1570 | } |
| 1571 | |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1572 | 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] | 1573 | { |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1574 | struct sk_buff *skb; |
| 1575 | struct sk_buff_head sar_queue; |
| 1576 | u16 control; |
| 1577 | size_t size = 0; |
| 1578 | |
Gustavo F. Padovan | ff12fd6 | 2010-05-05 22:09:15 -0300 | [diff] [blame] | 1579 | skb_queue_head_init(&sar_queue); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1580 | control = L2CAP_SDU_START; |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1581 | 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] | 1582 | if (IS_ERR(skb)) |
| 1583 | return PTR_ERR(skb); |
| 1584 | |
| 1585 | __skb_queue_tail(&sar_queue, skb); |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1586 | len -= chan->remote_mps; |
| 1587 | size += chan->remote_mps; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1588 | |
| 1589 | while (len > 0) { |
| 1590 | size_t buflen; |
| 1591 | |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1592 | if (len > chan->remote_mps) { |
Gustavo F. Padovan | 44651b8 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1593 | control = L2CAP_SDU_CONTINUE; |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1594 | buflen = chan->remote_mps; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1595 | } else { |
Gustavo F. Padovan | 44651b8 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1596 | control = L2CAP_SDU_END; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1597 | buflen = len; |
| 1598 | } |
| 1599 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1600 | skb = l2cap_create_iframe_pdu(chan, msg, buflen, control, 0); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1601 | if (IS_ERR(skb)) { |
| 1602 | skb_queue_purge(&sar_queue); |
| 1603 | return PTR_ERR(skb); |
| 1604 | } |
| 1605 | |
| 1606 | __skb_queue_tail(&sar_queue, skb); |
| 1607 | len -= buflen; |
| 1608 | size += buflen; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1609 | } |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1610 | skb_queue_splice_tail(&sar_queue, &chan->tx_q); |
| 1611 | if (chan->tx_send_head == NULL) |
| 1612 | chan->tx_send_head = sar_queue.next; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1613 | |
| 1614 | return size; |
| 1615 | } |
| 1616 | |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 1617 | int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len) |
| 1618 | { |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 1619 | struct sk_buff *skb; |
| 1620 | u16 control; |
| 1621 | int err; |
| 1622 | |
| 1623 | /* Connectionless channel */ |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 1624 | if (chan->chan_type == L2CAP_CHAN_CONN_LESS) { |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 1625 | skb = l2cap_create_connless_pdu(chan, msg, len); |
| 1626 | if (IS_ERR(skb)) |
| 1627 | return PTR_ERR(skb); |
| 1628 | |
| 1629 | l2cap_do_send(chan, skb); |
| 1630 | return len; |
| 1631 | } |
| 1632 | |
| 1633 | switch (chan->mode) { |
| 1634 | case L2CAP_MODE_BASIC: |
| 1635 | /* Check outgoing MTU */ |
| 1636 | if (len > chan->omtu) |
| 1637 | return -EMSGSIZE; |
| 1638 | |
| 1639 | /* Create a basic PDU */ |
| 1640 | skb = l2cap_create_basic_pdu(chan, msg, len); |
| 1641 | if (IS_ERR(skb)) |
| 1642 | return PTR_ERR(skb); |
| 1643 | |
| 1644 | l2cap_do_send(chan, skb); |
| 1645 | err = len; |
| 1646 | break; |
| 1647 | |
| 1648 | case L2CAP_MODE_ERTM: |
| 1649 | case L2CAP_MODE_STREAMING: |
| 1650 | /* Entire SDU fits into one PDU */ |
| 1651 | if (len <= chan->remote_mps) { |
| 1652 | control = L2CAP_SDU_UNSEGMENTED; |
| 1653 | skb = l2cap_create_iframe_pdu(chan, msg, len, control, |
| 1654 | 0); |
| 1655 | if (IS_ERR(skb)) |
| 1656 | return PTR_ERR(skb); |
| 1657 | |
| 1658 | __skb_queue_tail(&chan->tx_q, skb); |
| 1659 | |
| 1660 | if (chan->tx_send_head == NULL) |
| 1661 | chan->tx_send_head = skb; |
| 1662 | |
| 1663 | } else { |
| 1664 | /* Segment SDU into multiples PDUs */ |
| 1665 | err = l2cap_sar_segment_sdu(chan, msg, len); |
| 1666 | if (err < 0) |
| 1667 | return err; |
| 1668 | } |
| 1669 | |
| 1670 | if (chan->mode == L2CAP_MODE_STREAMING) { |
| 1671 | l2cap_streaming_send(chan); |
| 1672 | err = len; |
| 1673 | break; |
| 1674 | } |
| 1675 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1676 | if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state) && |
| 1677 | test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 1678 | err = len; |
| 1679 | break; |
| 1680 | } |
| 1681 | |
| 1682 | err = l2cap_ertm_send(chan); |
| 1683 | if (err >= 0) |
| 1684 | err = len; |
| 1685 | |
| 1686 | break; |
| 1687 | |
| 1688 | default: |
| 1689 | BT_DBG("bad state %1.1x", chan->mode); |
| 1690 | err = -EBADFD; |
| 1691 | } |
| 1692 | |
| 1693 | return err; |
| 1694 | } |
| 1695 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1696 | /* Copy frame to all raw sockets on that connection */ |
| 1697 | static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) |
| 1698 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1699 | struct sk_buff *nskb; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1700 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1701 | |
| 1702 | BT_DBG("conn %p", conn); |
| 1703 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1704 | read_lock(&conn->chan_lock); |
| 1705 | list_for_each_entry(chan, &conn->chan_l, list) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1706 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 1707 | if (chan->chan_type != L2CAP_CHAN_RAW) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1708 | continue; |
| 1709 | |
| 1710 | /* Don't send frame to the socket it came from */ |
| 1711 | if (skb->sk == sk) |
| 1712 | continue; |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 1713 | nskb = skb_clone(skb, GFP_ATOMIC); |
| 1714 | if (!nskb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1715 | continue; |
| 1716 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 1717 | if (chan->ops->recv(chan->data, nskb)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1718 | kfree_skb(nskb); |
| 1719 | } |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1720 | read_unlock(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1721 | } |
| 1722 | |
| 1723 | /* ---- L2CAP signalling commands ---- */ |
| 1724 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, |
| 1725 | u8 code, u8 ident, u16 dlen, void *data) |
| 1726 | { |
| 1727 | struct sk_buff *skb, **frag; |
| 1728 | struct l2cap_cmd_hdr *cmd; |
| 1729 | struct l2cap_hdr *lh; |
| 1730 | int len, count; |
| 1731 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 1732 | BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", |
| 1733 | conn, code, ident, dlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1734 | |
| 1735 | len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; |
| 1736 | count = min_t(unsigned int, conn->mtu, len); |
| 1737 | |
| 1738 | skb = bt_skb_alloc(count, GFP_ATOMIC); |
| 1739 | if (!skb) |
| 1740 | return NULL; |
| 1741 | |
| 1742 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1743 | lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 1744 | |
| 1745 | if (conn->hcon->type == LE_LINK) |
| 1746 | lh->cid = cpu_to_le16(L2CAP_CID_LE_SIGNALING); |
| 1747 | else |
| 1748 | lh->cid = cpu_to_le16(L2CAP_CID_SIGNALING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1749 | |
| 1750 | cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); |
| 1751 | cmd->code = code; |
| 1752 | cmd->ident = ident; |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1753 | cmd->len = cpu_to_le16(dlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1754 | |
| 1755 | if (dlen) { |
| 1756 | count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; |
| 1757 | memcpy(skb_put(skb, count), data, count); |
| 1758 | data += count; |
| 1759 | } |
| 1760 | |
| 1761 | len -= skb->len; |
| 1762 | |
| 1763 | /* Continuation fragments (no L2CAP header) */ |
| 1764 | frag = &skb_shinfo(skb)->frag_list; |
| 1765 | while (len) { |
| 1766 | count = min_t(unsigned int, conn->mtu, len); |
| 1767 | |
| 1768 | *frag = bt_skb_alloc(count, GFP_ATOMIC); |
| 1769 | if (!*frag) |
| 1770 | goto fail; |
| 1771 | |
| 1772 | memcpy(skb_put(*frag, count), data, count); |
| 1773 | |
| 1774 | len -= count; |
| 1775 | data += count; |
| 1776 | |
| 1777 | frag = &(*frag)->next; |
| 1778 | } |
| 1779 | |
| 1780 | return skb; |
| 1781 | |
| 1782 | fail: |
| 1783 | kfree_skb(skb); |
| 1784 | return NULL; |
| 1785 | } |
| 1786 | |
| 1787 | static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) |
| 1788 | { |
| 1789 | struct l2cap_conf_opt *opt = *ptr; |
| 1790 | int len; |
| 1791 | |
| 1792 | len = L2CAP_CONF_OPT_SIZE + opt->len; |
| 1793 | *ptr += len; |
| 1794 | |
| 1795 | *type = opt->type; |
| 1796 | *olen = opt->len; |
| 1797 | |
| 1798 | switch (opt->len) { |
| 1799 | case 1: |
| 1800 | *val = *((u8 *) opt->val); |
| 1801 | break; |
| 1802 | |
| 1803 | case 2: |
steven miao | bfaaeb3 | 2010-10-16 18:29:47 -0400 | [diff] [blame] | 1804 | *val = get_unaligned_le16(opt->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1805 | break; |
| 1806 | |
| 1807 | case 4: |
steven miao | bfaaeb3 | 2010-10-16 18:29:47 -0400 | [diff] [blame] | 1808 | *val = get_unaligned_le32(opt->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1809 | break; |
| 1810 | |
| 1811 | default: |
| 1812 | *val = (unsigned long) opt->val; |
| 1813 | break; |
| 1814 | } |
| 1815 | |
| 1816 | BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val); |
| 1817 | return len; |
| 1818 | } |
| 1819 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1820 | static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) |
| 1821 | { |
| 1822 | struct l2cap_conf_opt *opt = *ptr; |
| 1823 | |
| 1824 | BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val); |
| 1825 | |
| 1826 | opt->type = type; |
| 1827 | opt->len = len; |
| 1828 | |
| 1829 | switch (len) { |
| 1830 | case 1: |
| 1831 | *((u8 *) opt->val) = val; |
| 1832 | break; |
| 1833 | |
| 1834 | case 2: |
Gustavo F. Padovan | 4f8b691 | 2010-10-18 14:25:53 -0200 | [diff] [blame] | 1835 | put_unaligned_le16(val, opt->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1836 | break; |
| 1837 | |
| 1838 | case 4: |
Gustavo F. Padovan | 4f8b691 | 2010-10-18 14:25:53 -0200 | [diff] [blame] | 1839 | put_unaligned_le32(val, opt->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1840 | break; |
| 1841 | |
| 1842 | default: |
| 1843 | memcpy(opt->val, (void *) val, len); |
| 1844 | break; |
| 1845 | } |
| 1846 | |
| 1847 | *ptr += L2CAP_CONF_OPT_SIZE + len; |
| 1848 | } |
| 1849 | |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 1850 | static void l2cap_ack_timeout(unsigned long arg) |
| 1851 | { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1852 | struct l2cap_chan *chan = (void *) arg; |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 1853 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1854 | bh_lock_sock(chan->sk); |
| 1855 | l2cap_send_ack(chan); |
| 1856 | bh_unlock_sock(chan->sk); |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 1857 | } |
| 1858 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1859 | static inline void l2cap_ertm_init(struct l2cap_chan *chan) |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 1860 | { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1861 | struct sock *sk = chan->sk; |
| 1862 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1863 | chan->expected_ack_seq = 0; |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1864 | chan->unacked_frames = 0; |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1865 | chan->buffer_seq = 0; |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1866 | chan->num_acked = 0; |
| 1867 | chan->frames_sent = 0; |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 1868 | |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 1869 | setup_timer(&chan->retrans_timer, l2cap_retrans_timeout, |
| 1870 | (unsigned long) chan); |
| 1871 | setup_timer(&chan->monitor_timer, l2cap_monitor_timeout, |
| 1872 | (unsigned long) chan); |
| 1873 | setup_timer(&chan->ack_timer, l2cap_ack_timeout, (unsigned long) chan); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 1874 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 1875 | skb_queue_head_init(&chan->srej_q); |
| 1876 | skb_queue_head_init(&chan->busy_q); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1877 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 1878 | INIT_LIST_HEAD(&chan->srej_l); |
| 1879 | |
Gustavo F. Padovan | 311bb89 | 2011-03-25 20:41:00 -0300 | [diff] [blame] | 1880 | INIT_WORK(&chan->busy_work, l2cap_busy_work); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 1881 | |
| 1882 | sk->sk_backlog_rcv = l2cap_ertm_data_rcv; |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 1883 | } |
| 1884 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1885 | static inline __u8 l2cap_select_mode(__u8 mode, __u16 remote_feat_mask) |
| 1886 | { |
| 1887 | switch (mode) { |
| 1888 | case L2CAP_MODE_STREAMING: |
| 1889 | case L2CAP_MODE_ERTM: |
| 1890 | if (l2cap_mode_supported(mode, remote_feat_mask)) |
| 1891 | return mode; |
| 1892 | /* fall through */ |
| 1893 | default: |
| 1894 | return L2CAP_MODE_BASIC; |
| 1895 | } |
| 1896 | } |
| 1897 | |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 1898 | static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1899 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1900 | struct l2cap_conf_req *req = data; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 1901 | struct l2cap_conf_rfc rfc = { .mode = chan->mode }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1902 | void *ptr = req->data; |
| 1903 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 1904 | BT_DBG("chan %p", chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1905 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 1906 | if (chan->num_conf_req || chan->num_conf_rsp) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1907 | goto done; |
| 1908 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 1909 | switch (chan->mode) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1910 | case L2CAP_MODE_STREAMING: |
| 1911 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 1912 | if (test_bit(CONF_STATE2_DEVICE, &chan->conf_state)) |
Gustavo F. Padovan | 85eb53c | 2010-06-03 18:43:28 -0300 | [diff] [blame] | 1913 | break; |
Gustavo F. Padovan | 85eb53c | 2010-06-03 18:43:28 -0300 | [diff] [blame] | 1914 | |
Gustavo F. Padovan | 2ba13ed | 2010-06-09 16:39:05 -0300 | [diff] [blame] | 1915 | /* fall through */ |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1916 | default: |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1917 | chan->mode = l2cap_select_mode(rfc.mode, chan->conn->feat_mask); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1918 | break; |
| 1919 | } |
| 1920 | |
| 1921 | done: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 1922 | if (chan->imtu != L2CAP_DEFAULT_MTU) |
| 1923 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu); |
Gustavo F. Padovan | 7990681c | 2011-01-24 16:01:43 -0200 | [diff] [blame] | 1924 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 1925 | switch (chan->mode) { |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 1926 | case L2CAP_MODE_BASIC: |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1927 | if (!(chan->conn->feat_mask & L2CAP_FEAT_ERTM) && |
| 1928 | !(chan->conn->feat_mask & L2CAP_FEAT_STREAMING)) |
Gustavo F. Padovan | 6340650 | 2010-08-03 23:49:29 -0300 | [diff] [blame] | 1929 | break; |
| 1930 | |
Gustavo F. Padovan | 6254775 | 2010-06-08 20:05:31 -0300 | [diff] [blame] | 1931 | rfc.mode = L2CAP_MODE_BASIC; |
| 1932 | rfc.txwin_size = 0; |
| 1933 | rfc.max_transmit = 0; |
| 1934 | rfc.retrans_timeout = 0; |
| 1935 | rfc.monitor_timeout = 0; |
| 1936 | rfc.max_pdu_size = 0; |
| 1937 | |
Gustavo F. Padovan | 6340650 | 2010-08-03 23:49:29 -0300 | [diff] [blame] | 1938 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
| 1939 | (unsigned long) &rfc); |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 1940 | break; |
| 1941 | |
| 1942 | case L2CAP_MODE_ERTM: |
| 1943 | rfc.mode = L2CAP_MODE_ERTM; |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1944 | rfc.txwin_size = chan->tx_win; |
| 1945 | rfc.max_transmit = chan->max_tx; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1946 | rfc.retrans_timeout = 0; |
| 1947 | rfc.monitor_timeout = 0; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1948 | rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE); |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1949 | if (L2CAP_DEFAULT_MAX_PDU_SIZE > chan->conn->mtu - 10) |
| 1950 | rfc.max_pdu_size = cpu_to_le16(chan->conn->mtu - 10); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1951 | |
Gustavo F. Padovan | 6340650 | 2010-08-03 23:49:29 -0300 | [diff] [blame] | 1952 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
| 1953 | (unsigned long) &rfc); |
| 1954 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1955 | if (!(chan->conn->feat_mask & L2CAP_FEAT_FCS)) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1956 | break; |
| 1957 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1958 | if (chan->fcs == L2CAP_FCS_NONE || |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 1959 | test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1960 | chan->fcs = L2CAP_FCS_NONE; |
| 1961 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, chan->fcs); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1962 | } |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1963 | break; |
| 1964 | |
| 1965 | case L2CAP_MODE_STREAMING: |
| 1966 | rfc.mode = L2CAP_MODE_STREAMING; |
| 1967 | rfc.txwin_size = 0; |
| 1968 | rfc.max_transmit = 0; |
| 1969 | rfc.retrans_timeout = 0; |
| 1970 | rfc.monitor_timeout = 0; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1971 | rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE); |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1972 | if (L2CAP_DEFAULT_MAX_PDU_SIZE > chan->conn->mtu - 10) |
| 1973 | rfc.max_pdu_size = cpu_to_le16(chan->conn->mtu - 10); |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 1974 | |
Gustavo F. Padovan | 6340650 | 2010-08-03 23:49:29 -0300 | [diff] [blame] | 1975 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
| 1976 | (unsigned long) &rfc); |
| 1977 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1978 | if (!(chan->conn->feat_mask & L2CAP_FEAT_FCS)) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1979 | break; |
| 1980 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1981 | if (chan->fcs == L2CAP_FCS_NONE || |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 1982 | test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1983 | chan->fcs = L2CAP_FCS_NONE; |
| 1984 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, chan->fcs); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1985 | } |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 1986 | break; |
| 1987 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1988 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1989 | req->dcid = cpu_to_le16(chan->dcid); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1990 | req->flags = cpu_to_le16(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1991 | |
| 1992 | return ptr - data; |
| 1993 | } |
| 1994 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 1995 | static int l2cap_parse_conf_req(struct l2cap_chan *chan, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1996 | { |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1997 | struct l2cap_conf_rsp *rsp = data; |
| 1998 | void *ptr = rsp->data; |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 1999 | void *req = chan->conf_req; |
| 2000 | int len = chan->conf_len; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2001 | int type, hint, olen; |
| 2002 | unsigned long val; |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2003 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 2004 | u16 mtu = L2CAP_DEFAULT_MTU; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2005 | u16 result = L2CAP_CONF_SUCCESS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2006 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2007 | BT_DBG("chan %p", chan); |
Marcel Holtmann | 820ae1b | 2006-11-18 22:15:00 +0100 | [diff] [blame] | 2008 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2009 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 2010 | len -= l2cap_get_conf_opt(&req, &type, &olen, &val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2011 | |
Gustavo F. Padovan | 589d274 | 2009-04-20 01:31:07 -0300 | [diff] [blame] | 2012 | hint = type & L2CAP_CONF_HINT; |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 2013 | type &= L2CAP_CONF_MASK; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2014 | |
| 2015 | switch (type) { |
| 2016 | case L2CAP_CONF_MTU: |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 2017 | mtu = val; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2018 | break; |
| 2019 | |
| 2020 | case L2CAP_CONF_FLUSH_TO: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2021 | chan->flush_to = val; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2022 | break; |
| 2023 | |
| 2024 | case L2CAP_CONF_QOS: |
| 2025 | break; |
| 2026 | |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2027 | case L2CAP_CONF_RFC: |
| 2028 | if (olen == sizeof(rfc)) |
| 2029 | memcpy(&rfc, (void *) val, olen); |
| 2030 | break; |
| 2031 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2032 | case L2CAP_CONF_FCS: |
| 2033 | if (val == L2CAP_FCS_NONE) |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2034 | set_bit(CONF_NO_FCS_RECV, &chan->conf_state); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2035 | |
| 2036 | break; |
| 2037 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2038 | default: |
| 2039 | if (hint) |
| 2040 | break; |
| 2041 | |
| 2042 | result = L2CAP_CONF_UNKNOWN; |
| 2043 | *((u8 *) ptr++) = type; |
| 2044 | break; |
| 2045 | } |
| 2046 | } |
| 2047 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2048 | if (chan->num_conf_rsp || chan->num_conf_req > 1) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2049 | goto done; |
| 2050 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2051 | switch (chan->mode) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2052 | case L2CAP_MODE_STREAMING: |
| 2053 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2054 | if (!test_bit(CONF_STATE2_DEVICE, &chan->conf_state)) { |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2055 | chan->mode = l2cap_select_mode(rfc.mode, |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2056 | chan->conn->feat_mask); |
Gustavo F. Padovan | 85eb53c | 2010-06-03 18:43:28 -0300 | [diff] [blame] | 2057 | break; |
| 2058 | } |
| 2059 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2060 | if (chan->mode != rfc.mode) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2061 | return -ECONNREFUSED; |
Gustavo F. Padovan | 742e519 | 2010-06-08 19:09:48 -0300 | [diff] [blame] | 2062 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2063 | break; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2064 | } |
| 2065 | |
| 2066 | done: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2067 | if (chan->mode != rfc.mode) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2068 | result = L2CAP_CONF_UNACCEPT; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2069 | rfc.mode = chan->mode; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2070 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2071 | if (chan->num_conf_rsp == 1) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2072 | return -ECONNREFUSED; |
| 2073 | |
| 2074 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2075 | sizeof(rfc), (unsigned long) &rfc); |
| 2076 | } |
| 2077 | |
| 2078 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2079 | if (result == L2CAP_CONF_SUCCESS) { |
| 2080 | /* Configure output options and let the other side know |
| 2081 | * which ones we don't like. */ |
| 2082 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2083 | if (mtu < L2CAP_DEFAULT_MIN_MTU) |
| 2084 | result = L2CAP_CONF_UNACCEPT; |
| 2085 | else { |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2086 | chan->omtu = mtu; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2087 | set_bit(CONF_MTU_DONE, &chan->conf_state); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2088 | } |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2089 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->omtu); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2090 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2091 | switch (rfc.mode) { |
| 2092 | case L2CAP_MODE_BASIC: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2093 | chan->fcs = L2CAP_FCS_NONE; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2094 | set_bit(CONF_MODE_DONE, &chan->conf_state); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2095 | break; |
| 2096 | |
| 2097 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 2098 | chan->remote_tx_win = rfc.txwin_size; |
| 2099 | chan->remote_max_tx = rfc.max_transmit; |
Mat Martineau | 86b1b26 | 2010-08-05 15:54:22 -0700 | [diff] [blame] | 2100 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2101 | if (le16_to_cpu(rfc.max_pdu_size) > chan->conn->mtu - 10) |
| 2102 | rfc.max_pdu_size = cpu_to_le16(chan->conn->mtu - 10); |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2103 | |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 2104 | chan->remote_mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2105 | |
Gustavo F. Padovan | 10467e9 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2106 | rfc.retrans_timeout = |
| 2107 | le16_to_cpu(L2CAP_DEFAULT_RETRANS_TO); |
| 2108 | rfc.monitor_timeout = |
| 2109 | le16_to_cpu(L2CAP_DEFAULT_MONITOR_TO); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2110 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2111 | set_bit(CONF_MODE_DONE, &chan->conf_state); |
Gustavo F. Padovan | 68ae663 | 2009-10-17 21:41:01 -0300 | [diff] [blame] | 2112 | |
| 2113 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2114 | sizeof(rfc), (unsigned long) &rfc); |
| 2115 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2116 | break; |
| 2117 | |
| 2118 | case L2CAP_MODE_STREAMING: |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2119 | if (le16_to_cpu(rfc.max_pdu_size) > chan->conn->mtu - 10) |
| 2120 | rfc.max_pdu_size = cpu_to_le16(chan->conn->mtu - 10); |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2121 | |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 2122 | chan->remote_mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2123 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2124 | set_bit(CONF_MODE_DONE, &chan->conf_state); |
Gustavo F. Padovan | 68ae663 | 2009-10-17 21:41:01 -0300 | [diff] [blame] | 2125 | |
| 2126 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2127 | sizeof(rfc), (unsigned long) &rfc); |
| 2128 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2129 | break; |
| 2130 | |
| 2131 | default: |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2132 | result = L2CAP_CONF_UNACCEPT; |
| 2133 | |
| 2134 | memset(&rfc, 0, sizeof(rfc)); |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2135 | rfc.mode = chan->mode; |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2136 | } |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2137 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2138 | if (result == L2CAP_CONF_SUCCESS) |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2139 | set_bit(CONF_OUTPUT_DONE, &chan->conf_state); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2140 | } |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2141 | rsp->scid = cpu_to_le16(chan->dcid); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2142 | rsp->result = cpu_to_le16(result); |
| 2143 | rsp->flags = cpu_to_le16(0x0000); |
| 2144 | |
| 2145 | return ptr - data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2146 | } |
| 2147 | |
Gustavo F. Padovan | b445003 | 2011-04-12 18:15:09 -0300 | [diff] [blame] | 2148 | 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] | 2149 | { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2150 | struct l2cap_conf_req *req = data; |
| 2151 | void *ptr = req->data; |
| 2152 | int type, olen; |
| 2153 | unsigned long val; |
| 2154 | struct l2cap_conf_rfc rfc; |
| 2155 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2156 | 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] | 2157 | |
| 2158 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 2159 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); |
| 2160 | |
| 2161 | switch (type) { |
| 2162 | case L2CAP_CONF_MTU: |
| 2163 | if (val < L2CAP_DEFAULT_MIN_MTU) { |
| 2164 | *result = L2CAP_CONF_UNACCEPT; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2165 | chan->imtu = L2CAP_DEFAULT_MIN_MTU; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2166 | } else |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2167 | chan->imtu = val; |
| 2168 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2169 | break; |
| 2170 | |
| 2171 | case L2CAP_CONF_FLUSH_TO: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2172 | chan->flush_to = val; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2173 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2174 | 2, chan->flush_to); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2175 | break; |
| 2176 | |
| 2177 | case L2CAP_CONF_RFC: |
| 2178 | if (olen == sizeof(rfc)) |
| 2179 | memcpy(&rfc, (void *)val, olen); |
| 2180 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2181 | if (test_bit(CONF_STATE2_DEVICE, &chan->conf_state) && |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2182 | rfc.mode != chan->mode) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2183 | return -ECONNREFUSED; |
| 2184 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2185 | chan->fcs = 0; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2186 | |
| 2187 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2188 | sizeof(rfc), (unsigned long) &rfc); |
| 2189 | break; |
| 2190 | } |
| 2191 | } |
| 2192 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2193 | if (chan->mode == L2CAP_MODE_BASIC && chan->mode != rfc.mode) |
Gustavo F. Padovan | 6c2ea7a | 2010-06-08 20:08:49 -0300 | [diff] [blame] | 2194 | return -ECONNREFUSED; |
| 2195 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2196 | chan->mode = rfc.mode; |
Gustavo F. Padovan | 6c2ea7a | 2010-06-08 20:08:49 -0300 | [diff] [blame] | 2197 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2198 | if (*result == L2CAP_CONF_SUCCESS) { |
| 2199 | switch (rfc.mode) { |
| 2200 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2201 | chan->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); |
| 2202 | chan->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); |
| 2203 | chan->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2204 | break; |
| 2205 | case L2CAP_MODE_STREAMING: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2206 | chan->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2207 | } |
| 2208 | } |
| 2209 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2210 | req->dcid = cpu_to_le16(chan->dcid); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2211 | req->flags = cpu_to_le16(0x0000); |
| 2212 | |
| 2213 | return ptr - data; |
| 2214 | } |
| 2215 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2216 | 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] | 2217 | { |
| 2218 | struct l2cap_conf_rsp *rsp = data; |
| 2219 | void *ptr = rsp->data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2220 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2221 | BT_DBG("chan %p", chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2222 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2223 | rsp->scid = cpu_to_le16(chan->dcid); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2224 | rsp->result = cpu_to_le16(result); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2225 | rsp->flags = cpu_to_le16(flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2226 | |
| 2227 | return ptr - data; |
| 2228 | } |
| 2229 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2230 | void __l2cap_connect_rsp_defer(struct l2cap_chan *chan) |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2231 | { |
| 2232 | struct l2cap_conn_rsp rsp; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2233 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2234 | u8 buf[128]; |
| 2235 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2236 | rsp.scid = cpu_to_le16(chan->dcid); |
| 2237 | rsp.dcid = cpu_to_le16(chan->scid); |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2238 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); |
| 2239 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 2240 | l2cap_send_cmd(conn, chan->ident, |
| 2241 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
| 2242 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2243 | if (test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2244 | return; |
| 2245 | |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2246 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
| 2247 | l2cap_build_conf_req(chan, buf), buf); |
| 2248 | chan->num_conf_req++; |
| 2249 | } |
| 2250 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2251 | 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] | 2252 | { |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2253 | int type, olen; |
| 2254 | unsigned long val; |
| 2255 | struct l2cap_conf_rfc rfc; |
| 2256 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2257 | BT_DBG("chan %p, rsp %p, len %d", chan, rsp, len); |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2258 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2259 | if ((chan->mode != L2CAP_MODE_ERTM) && (chan->mode != L2CAP_MODE_STREAMING)) |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2260 | return; |
| 2261 | |
| 2262 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 2263 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); |
| 2264 | |
| 2265 | switch (type) { |
| 2266 | case L2CAP_CONF_RFC: |
| 2267 | if (olen == sizeof(rfc)) |
| 2268 | memcpy(&rfc, (void *)val, olen); |
| 2269 | goto done; |
| 2270 | } |
| 2271 | } |
| 2272 | |
| 2273 | done: |
| 2274 | switch (rfc.mode) { |
| 2275 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2276 | chan->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); |
| 2277 | chan->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); |
| 2278 | chan->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2279 | break; |
| 2280 | case L2CAP_MODE_STREAMING: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2281 | chan->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2282 | } |
| 2283 | } |
| 2284 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2285 | static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2286 | { |
| 2287 | struct l2cap_cmd_rej *rej = (struct l2cap_cmd_rej *) data; |
| 2288 | |
| 2289 | if (rej->reason != 0x0000) |
| 2290 | return 0; |
| 2291 | |
| 2292 | if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) && |
| 2293 | cmd->ident == conn->info_ident) { |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2294 | del_timer(&conn->info_timer); |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2295 | |
| 2296 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 2297 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2298 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2299 | l2cap_conn_start(conn); |
| 2300 | } |
| 2301 | |
| 2302 | return 0; |
| 2303 | } |
| 2304 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2305 | static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2306 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2307 | struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; |
| 2308 | struct l2cap_conn_rsp rsp; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 2309 | struct l2cap_chan *chan = NULL, *pchan; |
Nathan Holstein | d793fe8 | 2010-10-15 11:54:02 -0400 | [diff] [blame] | 2310 | struct sock *parent, *sk = NULL; |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2311 | int result, status = L2CAP_CS_NO_INFO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2312 | |
| 2313 | u16 dcid = 0, scid = __le16_to_cpu(req->scid); |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2314 | __le16 psm = req->psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2315 | |
| 2316 | BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid); |
| 2317 | |
| 2318 | /* Check if we have socket listening on psm */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 2319 | pchan = l2cap_global_chan_by_psm(BT_LISTEN, psm, conn->src); |
| 2320 | if (!pchan) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2321 | result = L2CAP_CR_BAD_PSM; |
| 2322 | goto sendresp; |
| 2323 | } |
| 2324 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 2325 | parent = pchan->sk; |
| 2326 | |
Gustavo F. Padovan | e0f0cb5 | 2010-11-01 18:43:53 +0000 | [diff] [blame] | 2327 | bh_lock_sock(parent); |
| 2328 | |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2329 | /* Check if the ACL is secure enough (if not SDP) */ |
| 2330 | if (psm != cpu_to_le16(0x0001) && |
| 2331 | !hci_conn_check_link_mode(conn->hcon)) { |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 2332 | conn->disc_reason = 0x05; |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2333 | result = L2CAP_CR_SEC_BLOCK; |
| 2334 | goto response; |
| 2335 | } |
| 2336 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2337 | result = L2CAP_CR_NO_MEM; |
| 2338 | |
| 2339 | /* Check for backlog size */ |
| 2340 | if (sk_acceptq_is_full(parent)) { |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 2341 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2342 | goto response; |
| 2343 | } |
| 2344 | |
Gustavo F. Padovan | 80808e4 | 2011-05-16 17:24:37 -0300 | [diff] [blame] | 2345 | chan = pchan->ops->new_connection(pchan->data); |
| 2346 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2347 | goto response; |
| 2348 | |
Gustavo F. Padovan | 80808e4 | 2011-05-16 17:24:37 -0300 | [diff] [blame] | 2349 | sk = chan->sk; |
| 2350 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2351 | write_lock_bh(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2352 | |
| 2353 | /* Check if we already have channel with that dcid */ |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2354 | if (__l2cap_get_chan_by_dcid(conn, scid)) { |
| 2355 | write_unlock_bh(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2356 | sock_set_flag(sk, SOCK_ZAPPED); |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 2357 | chan->ops->close(chan->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2358 | goto response; |
| 2359 | } |
| 2360 | |
| 2361 | hci_conn_hold(conn->hcon); |
| 2362 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2363 | bacpy(&bt_sk(sk)->src, conn->src); |
| 2364 | bacpy(&bt_sk(sk)->dst, conn->dst); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2365 | chan->psm = psm; |
| 2366 | chan->dcid = scid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2367 | |
Gustavo F. Padovan | d101024 | 2011-03-25 00:39:48 -0300 | [diff] [blame] | 2368 | bt_accept_enqueue(parent, sk); |
| 2369 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2370 | __l2cap_chan_add(conn, chan); |
| 2371 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2372 | dcid = chan->scid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2373 | |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 2374 | __set_chan_timer(chan, sk->sk_sndtimeo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2375 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 2376 | chan->ident = cmd->ident; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2377 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2378 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 2379 | if (l2cap_check_security(chan)) { |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 2380 | if (bt_sk(sk)->defer_setup) { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2381 | l2cap_state_change(chan, BT_CONNECT2); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 2382 | result = L2CAP_CR_PEND; |
| 2383 | status = L2CAP_CS_AUTHOR_PEND; |
| 2384 | parent->sk_data_ready(parent, 0); |
| 2385 | } else { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2386 | l2cap_state_change(chan, BT_CONFIG); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 2387 | result = L2CAP_CR_SUCCESS; |
| 2388 | status = L2CAP_CS_NO_INFO; |
| 2389 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2390 | } else { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2391 | l2cap_state_change(chan, BT_CONNECT2); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2392 | result = L2CAP_CR_PEND; |
| 2393 | status = L2CAP_CS_AUTHEN_PEND; |
| 2394 | } |
| 2395 | } else { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2396 | l2cap_state_change(chan, BT_CONNECT2); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2397 | result = L2CAP_CR_PEND; |
| 2398 | status = L2CAP_CS_NO_INFO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2399 | } |
| 2400 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2401 | write_unlock_bh(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2402 | |
| 2403 | response: |
| 2404 | bh_unlock_sock(parent); |
| 2405 | |
| 2406 | sendresp: |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2407 | rsp.scid = cpu_to_le16(scid); |
| 2408 | rsp.dcid = cpu_to_le16(dcid); |
| 2409 | rsp.result = cpu_to_le16(result); |
| 2410 | rsp.status = cpu_to_le16(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2411 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2412 | |
| 2413 | if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) { |
| 2414 | struct l2cap_info_req info; |
| 2415 | info.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 2416 | |
| 2417 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; |
| 2418 | conn->info_ident = l2cap_get_ident(conn); |
| 2419 | |
| 2420 | mod_timer(&conn->info_timer, jiffies + |
| 2421 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); |
| 2422 | |
| 2423 | l2cap_send_cmd(conn, conn->info_ident, |
| 2424 | L2CAP_INFO_REQ, sizeof(info), &info); |
| 2425 | } |
| 2426 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2427 | if (chan && !test_bit(CONF_REQ_SENT, &chan->conf_state) && |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 2428 | result == L2CAP_CR_SUCCESS) { |
| 2429 | u8 buf[128]; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2430 | set_bit(CONF_REQ_SENT, &chan->conf_state); |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 2431 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2432 | l2cap_build_conf_req(chan, buf), buf); |
| 2433 | chan->num_conf_req++; |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 2434 | } |
| 2435 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2436 | return 0; |
| 2437 | } |
| 2438 | |
| 2439 | static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2440 | { |
| 2441 | struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; |
| 2442 | u16 scid, dcid, result, status; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2443 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2444 | struct sock *sk; |
| 2445 | u8 req[128]; |
| 2446 | |
| 2447 | scid = __le16_to_cpu(rsp->scid); |
| 2448 | dcid = __le16_to_cpu(rsp->dcid); |
| 2449 | result = __le16_to_cpu(rsp->result); |
| 2450 | status = __le16_to_cpu(rsp->status); |
| 2451 | |
| 2452 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid, scid, result, status); |
| 2453 | |
| 2454 | if (scid) { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2455 | chan = l2cap_get_chan_by_scid(conn, scid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2456 | if (!chan) |
João Paulo Rechi Vita | 57d3b22 | 2010-06-22 13:56:26 -0300 | [diff] [blame] | 2457 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2458 | } else { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2459 | chan = l2cap_get_chan_by_ident(conn, cmd->ident); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2460 | if (!chan) |
João Paulo Rechi Vita | 57d3b22 | 2010-06-22 13:56:26 -0300 | [diff] [blame] | 2461 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2462 | } |
| 2463 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2464 | sk = chan->sk; |
| 2465 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2466 | switch (result) { |
| 2467 | case L2CAP_CR_SUCCESS: |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2468 | l2cap_state_change(chan, BT_CONFIG); |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 2469 | chan->ident = 0; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2470 | chan->dcid = dcid; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2471 | clear_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Marcel Holtmann | 6a8d301 | 2009-02-06 23:56:36 +0100 | [diff] [blame] | 2472 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2473 | if (test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 2474 | break; |
| 2475 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2476 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2477 | l2cap_build_conf_req(chan, req), req); |
| 2478 | chan->num_conf_req++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2479 | break; |
| 2480 | |
| 2481 | case L2CAP_CR_PEND: |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2482 | set_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2483 | break; |
| 2484 | |
| 2485 | default: |
Andrei Emeltchenko | a49184c | 2010-11-03 12:32:44 +0200 | [diff] [blame] | 2486 | /* don't delete l2cap channel if sk is owned by user */ |
| 2487 | if (sock_owned_by_user(sk)) { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2488 | l2cap_state_change(chan, BT_DISCONN); |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 2489 | __clear_chan_timer(chan); |
| 2490 | __set_chan_timer(chan, HZ / 5); |
Andrei Emeltchenko | a49184c | 2010-11-03 12:32:44 +0200 | [diff] [blame] | 2491 | break; |
| 2492 | } |
| 2493 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2494 | l2cap_chan_del(chan, ECONNREFUSED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2495 | break; |
| 2496 | } |
| 2497 | |
| 2498 | bh_unlock_sock(sk); |
| 2499 | return 0; |
| 2500 | } |
| 2501 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2502 | static inline void set_default_fcs(struct l2cap_chan *chan) |
Mat Martineau | 8c462b6 | 2010-08-24 15:35:42 -0700 | [diff] [blame] | 2503 | { |
| 2504 | /* FCS is enabled only in ERTM or streaming mode, if one or both |
| 2505 | * sides request it. |
| 2506 | */ |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2507 | if (chan->mode != L2CAP_MODE_ERTM && chan->mode != L2CAP_MODE_STREAMING) |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2508 | chan->fcs = L2CAP_FCS_NONE; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2509 | else if (!test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2510 | chan->fcs = L2CAP_FCS_CRC16; |
Mat Martineau | 8c462b6 | 2010-08-24 15:35:42 -0700 | [diff] [blame] | 2511 | } |
| 2512 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 2513 | 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] | 2514 | { |
| 2515 | struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; |
| 2516 | u16 dcid, flags; |
| 2517 | u8 rsp[64]; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2518 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2519 | struct sock *sk; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2520 | int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2521 | |
| 2522 | dcid = __le16_to_cpu(req->dcid); |
| 2523 | flags = __le16_to_cpu(req->flags); |
| 2524 | |
| 2525 | BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); |
| 2526 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2527 | chan = l2cap_get_chan_by_scid(conn, dcid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2528 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2529 | return -ENOENT; |
| 2530 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2531 | sk = chan->sk; |
| 2532 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2533 | if (chan->state != BT_CONFIG) { |
Gustavo F. Padovan | df6bd74 | 2010-06-14 02:26:15 -0300 | [diff] [blame] | 2534 | struct l2cap_cmd_rej rej; |
| 2535 | |
| 2536 | rej.reason = cpu_to_le16(0x0002); |
| 2537 | l2cap_send_cmd(conn, cmd->ident, L2CAP_COMMAND_REJ, |
| 2538 | sizeof(rej), &rej); |
Marcel Holtmann | 354f60a | 2006-11-18 22:15:20 +0100 | [diff] [blame] | 2539 | goto unlock; |
Gustavo F. Padovan | df6bd74 | 2010-06-14 02:26:15 -0300 | [diff] [blame] | 2540 | } |
Marcel Holtmann | 354f60a | 2006-11-18 22:15:20 +0100 | [diff] [blame] | 2541 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2542 | /* Reject if config buffer is too small. */ |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 2543 | len = cmd_len - sizeof(*req); |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2544 | if (chan->conf_len + len > sizeof(chan->conf_req)) { |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2545 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2546 | l2cap_build_conf_rsp(chan, rsp, |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2547 | L2CAP_CONF_REJECT, flags), rsp); |
| 2548 | goto unlock; |
| 2549 | } |
| 2550 | |
| 2551 | /* Store config. */ |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2552 | memcpy(chan->conf_req + chan->conf_len, req->data, len); |
| 2553 | chan->conf_len += len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2554 | |
| 2555 | if (flags & 0x0001) { |
| 2556 | /* Incomplete config. Send empty response. */ |
| 2557 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2558 | l2cap_build_conf_rsp(chan, rsp, |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2559 | L2CAP_CONF_SUCCESS, 0x0001), rsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2560 | goto unlock; |
| 2561 | } |
| 2562 | |
| 2563 | /* Complete config. */ |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2564 | len = l2cap_parse_conf_req(chan, rsp); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2565 | if (len < 0) { |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 2566 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2567 | goto unlock; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2568 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2569 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2570 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2571 | chan->num_conf_rsp++; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2572 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2573 | /* Reset config buffer. */ |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2574 | chan->conf_len = 0; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2575 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2576 | if (!test_bit(CONF_OUTPUT_DONE, &chan->conf_state)) |
Marcel Holtmann | 876d948 | 2007-10-20 13:35:42 +0200 | [diff] [blame] | 2577 | goto unlock; |
| 2578 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2579 | if (test_bit(CONF_INPUT_DONE, &chan->conf_state)) { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2580 | set_default_fcs(chan); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2581 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2582 | l2cap_state_change(chan, BT_CONNECTED); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2583 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 2584 | chan->next_tx_seq = 0; |
| 2585 | chan->expected_tx_seq = 0; |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 2586 | skb_queue_head_init(&chan->tx_q); |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2587 | if (chan->mode == L2CAP_MODE_ERTM) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 2588 | l2cap_ertm_init(chan); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2589 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2590 | l2cap_chan_ready(sk); |
Marcel Holtmann | 876d948 | 2007-10-20 13:35:42 +0200 | [diff] [blame] | 2591 | goto unlock; |
| 2592 | } |
| 2593 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2594 | if (!test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2595 | u8 buf[64]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2596 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2597 | l2cap_build_conf_req(chan, buf), buf); |
| 2598 | chan->num_conf_req++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2599 | } |
| 2600 | |
| 2601 | unlock: |
| 2602 | bh_unlock_sock(sk); |
| 2603 | return 0; |
| 2604 | } |
| 2605 | |
| 2606 | static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2607 | { |
| 2608 | struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; |
| 2609 | u16 scid, flags, result; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2610 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2611 | struct sock *sk; |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2612 | int len = cmd->len - sizeof(*rsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2613 | |
| 2614 | scid = __le16_to_cpu(rsp->scid); |
| 2615 | flags = __le16_to_cpu(rsp->flags); |
| 2616 | result = __le16_to_cpu(rsp->result); |
| 2617 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2618 | BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x", |
| 2619 | scid, flags, result); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2620 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2621 | chan = l2cap_get_chan_by_scid(conn, scid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2622 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2623 | return 0; |
| 2624 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2625 | sk = chan->sk; |
| 2626 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2627 | switch (result) { |
| 2628 | case L2CAP_CONF_SUCCESS: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2629 | l2cap_conf_rfc_get(chan, rsp->data, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2630 | break; |
| 2631 | |
| 2632 | case L2CAP_CONF_UNACCEPT: |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2633 | if (chan->num_conf_rsp <= L2CAP_CONF_MAX_CONF_RSP) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2634 | char req[64]; |
| 2635 | |
Andrei Emeltchenko | c2c77ec | 2010-03-19 10:26:28 +0200 | [diff] [blame] | 2636 | if (len > sizeof(req) - sizeof(struct l2cap_conf_req)) { |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 2637 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
Andrei Emeltchenko | c2c77ec | 2010-03-19 10:26:28 +0200 | [diff] [blame] | 2638 | goto done; |
| 2639 | } |
| 2640 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2641 | /* throw out any old stored conf requests */ |
| 2642 | result = L2CAP_CONF_SUCCESS; |
Gustavo F. Padovan | b445003 | 2011-04-12 18:15:09 -0300 | [diff] [blame] | 2643 | len = l2cap_parse_conf_rsp(chan, rsp->data, len, |
| 2644 | req, &result); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2645 | if (len < 0) { |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 2646 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2647 | goto done; |
| 2648 | } |
| 2649 | |
| 2650 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
| 2651 | L2CAP_CONF_REQ, len, req); |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2652 | chan->num_conf_req++; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2653 | if (result != L2CAP_CONF_SUCCESS) |
| 2654 | goto done; |
| 2655 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2656 | } |
| 2657 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 2658 | default: |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 2659 | sk->sk_err = ECONNRESET; |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 2660 | __set_chan_timer(chan, HZ * 5); |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 2661 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2662 | goto done; |
| 2663 | } |
| 2664 | |
| 2665 | if (flags & 0x01) |
| 2666 | goto done; |
| 2667 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2668 | set_bit(CONF_INPUT_DONE, &chan->conf_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2669 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2670 | if (test_bit(CONF_OUTPUT_DONE, &chan->conf_state)) { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2671 | set_default_fcs(chan); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2672 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2673 | l2cap_state_change(chan, BT_CONNECTED); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 2674 | chan->next_tx_seq = 0; |
| 2675 | chan->expected_tx_seq = 0; |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 2676 | skb_queue_head_init(&chan->tx_q); |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2677 | if (chan->mode == L2CAP_MODE_ERTM) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 2678 | l2cap_ertm_init(chan); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2679 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2680 | l2cap_chan_ready(sk); |
| 2681 | } |
| 2682 | |
| 2683 | done: |
| 2684 | bh_unlock_sock(sk); |
| 2685 | return 0; |
| 2686 | } |
| 2687 | |
| 2688 | static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2689 | { |
| 2690 | struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; |
| 2691 | struct l2cap_disconn_rsp rsp; |
| 2692 | u16 dcid, scid; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2693 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2694 | struct sock *sk; |
| 2695 | |
| 2696 | scid = __le16_to_cpu(req->scid); |
| 2697 | dcid = __le16_to_cpu(req->dcid); |
| 2698 | |
| 2699 | BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); |
| 2700 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2701 | chan = l2cap_get_chan_by_scid(conn, dcid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2702 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2703 | return 0; |
| 2704 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2705 | sk = chan->sk; |
| 2706 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2707 | rsp.dcid = cpu_to_le16(chan->scid); |
| 2708 | rsp.scid = cpu_to_le16(chan->dcid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2709 | l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); |
| 2710 | |
| 2711 | sk->sk_shutdown = SHUTDOWN_MASK; |
| 2712 | |
Andrei Emeltchenko | a49184c | 2010-11-03 12:32:44 +0200 | [diff] [blame] | 2713 | /* don't delete l2cap channel if sk is owned by user */ |
| 2714 | if (sock_owned_by_user(sk)) { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2715 | l2cap_state_change(chan, BT_DISCONN); |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 2716 | __clear_chan_timer(chan); |
| 2717 | __set_chan_timer(chan, HZ / 5); |
Andrei Emeltchenko | a49184c | 2010-11-03 12:32:44 +0200 | [diff] [blame] | 2718 | bh_unlock_sock(sk); |
| 2719 | return 0; |
| 2720 | } |
| 2721 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2722 | l2cap_chan_del(chan, ECONNRESET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2723 | bh_unlock_sock(sk); |
| 2724 | |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 2725 | chan->ops->close(chan->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2726 | return 0; |
| 2727 | } |
| 2728 | |
| 2729 | static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2730 | { |
| 2731 | struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; |
| 2732 | u16 dcid, scid; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2733 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2734 | struct sock *sk; |
| 2735 | |
| 2736 | scid = __le16_to_cpu(rsp->scid); |
| 2737 | dcid = __le16_to_cpu(rsp->dcid); |
| 2738 | |
| 2739 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); |
| 2740 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2741 | chan = l2cap_get_chan_by_scid(conn, scid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2742 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2743 | return 0; |
| 2744 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2745 | sk = chan->sk; |
| 2746 | |
Andrei Emeltchenko | a49184c | 2010-11-03 12:32:44 +0200 | [diff] [blame] | 2747 | /* don't delete l2cap channel if sk is owned by user */ |
| 2748 | if (sock_owned_by_user(sk)) { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2749 | l2cap_state_change(chan,BT_DISCONN); |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 2750 | __clear_chan_timer(chan); |
| 2751 | __set_chan_timer(chan, HZ / 5); |
Andrei Emeltchenko | a49184c | 2010-11-03 12:32:44 +0200 | [diff] [blame] | 2752 | bh_unlock_sock(sk); |
| 2753 | return 0; |
| 2754 | } |
| 2755 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2756 | l2cap_chan_del(chan, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2757 | bh_unlock_sock(sk); |
| 2758 | |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 2759 | chan->ops->close(chan->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2760 | return 0; |
| 2761 | } |
| 2762 | |
| 2763 | static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2764 | { |
| 2765 | struct l2cap_info_req *req = (struct l2cap_info_req *) data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2766 | u16 type; |
| 2767 | |
| 2768 | type = __le16_to_cpu(req->type); |
| 2769 | |
| 2770 | BT_DBG("type 0x%4.4x", type); |
| 2771 | |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 2772 | if (type == L2CAP_IT_FEAT_MASK) { |
| 2773 | u8 buf[8]; |
Marcel Holtmann | 44dd46d | 2009-05-02 19:09:01 -0700 | [diff] [blame] | 2774 | u32 feat_mask = l2cap_feat_mask; |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 2775 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
| 2776 | rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 2777 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); |
Gustavo F. Padovan | d1c4a17 | 2010-07-18 16:25:54 -0300 | [diff] [blame] | 2778 | if (!disable_ertm) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2779 | feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING |
| 2780 | | L2CAP_FEAT_FCS; |
Gustavo F. Padovan | 1b7bf4e | 2009-08-24 00:45:20 -0300 | [diff] [blame] | 2781 | put_unaligned_le32(feat_mask, rsp->data); |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 2782 | l2cap_send_cmd(conn, cmd->ident, |
| 2783 | L2CAP_INFO_RSP, sizeof(buf), buf); |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 2784 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
| 2785 | u8 buf[12]; |
| 2786 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
| 2787 | rsp->type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); |
| 2788 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); |
| 2789 | memcpy(buf + 4, l2cap_fixed_chan, 8); |
| 2790 | l2cap_send_cmd(conn, cmd->ident, |
| 2791 | L2CAP_INFO_RSP, sizeof(buf), buf); |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 2792 | } else { |
| 2793 | struct l2cap_info_rsp rsp; |
| 2794 | rsp.type = cpu_to_le16(type); |
| 2795 | rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP); |
| 2796 | l2cap_send_cmd(conn, cmd->ident, |
| 2797 | L2CAP_INFO_RSP, sizeof(rsp), &rsp); |
| 2798 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2799 | |
| 2800 | return 0; |
| 2801 | } |
| 2802 | |
| 2803 | static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2804 | { |
| 2805 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; |
| 2806 | u16 type, result; |
| 2807 | |
| 2808 | type = __le16_to_cpu(rsp->type); |
| 2809 | result = __le16_to_cpu(rsp->result); |
| 2810 | |
| 2811 | BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); |
| 2812 | |
Andrei Emeltchenko | e90165b | 2011-03-25 11:31:41 +0200 | [diff] [blame] | 2813 | /* L2CAP Info req/rsp are unbound to channels, add extra checks */ |
| 2814 | if (cmd->ident != conn->info_ident || |
| 2815 | conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) |
| 2816 | return 0; |
| 2817 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2818 | del_timer(&conn->info_timer); |
| 2819 | |
Ville Tervo | adb08ed | 2010-08-04 09:43:33 +0300 | [diff] [blame] | 2820 | if (result != L2CAP_IR_SUCCESS) { |
| 2821 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
| 2822 | conn->info_ident = 0; |
| 2823 | |
| 2824 | l2cap_conn_start(conn); |
| 2825 | |
| 2826 | return 0; |
| 2827 | } |
| 2828 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2829 | if (type == L2CAP_IT_FEAT_MASK) { |
Harvey Harrison | 8398531 | 2008-05-02 16:25:46 -0700 | [diff] [blame] | 2830 | conn->feat_mask = get_unaligned_le32(rsp->data); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2831 | |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 2832 | if (conn->feat_mask & L2CAP_FEAT_FIXED_CHAN) { |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 2833 | struct l2cap_info_req req; |
| 2834 | req.type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); |
| 2835 | |
| 2836 | conn->info_ident = l2cap_get_ident(conn); |
| 2837 | |
| 2838 | l2cap_send_cmd(conn, conn->info_ident, |
| 2839 | L2CAP_INFO_REQ, sizeof(req), &req); |
| 2840 | } else { |
| 2841 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
| 2842 | conn->info_ident = 0; |
| 2843 | |
| 2844 | l2cap_conn_start(conn); |
| 2845 | } |
| 2846 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2847 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 2848 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2849 | |
| 2850 | l2cap_conn_start(conn); |
| 2851 | } |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2852 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2853 | return 0; |
| 2854 | } |
| 2855 | |
Gustavo F. Padovan | e2174ca | 2011-02-17 19:16:55 -0300 | [diff] [blame] | 2856 | 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] | 2857 | u16 to_multiplier) |
| 2858 | { |
| 2859 | u16 max_latency; |
| 2860 | |
| 2861 | if (min > max || min < 6 || max > 3200) |
| 2862 | return -EINVAL; |
| 2863 | |
| 2864 | if (to_multiplier < 10 || to_multiplier > 3200) |
| 2865 | return -EINVAL; |
| 2866 | |
| 2867 | if (max >= to_multiplier * 8) |
| 2868 | return -EINVAL; |
| 2869 | |
| 2870 | max_latency = (to_multiplier * 8 / max) - 1; |
| 2871 | if (latency > 499 || latency > max_latency) |
| 2872 | return -EINVAL; |
| 2873 | |
| 2874 | return 0; |
| 2875 | } |
| 2876 | |
| 2877 | static inline int l2cap_conn_param_update_req(struct l2cap_conn *conn, |
| 2878 | struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2879 | { |
| 2880 | struct hci_conn *hcon = conn->hcon; |
| 2881 | struct l2cap_conn_param_update_req *req; |
| 2882 | struct l2cap_conn_param_update_rsp rsp; |
| 2883 | u16 min, max, latency, to_multiplier, cmd_len; |
Claudio Takahasi | 2ce603e | 2011-02-16 20:44:53 -0200 | [diff] [blame] | 2884 | int err; |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 2885 | |
| 2886 | if (!(hcon->link_mode & HCI_LM_MASTER)) |
| 2887 | return -EINVAL; |
| 2888 | |
| 2889 | cmd_len = __le16_to_cpu(cmd->len); |
| 2890 | if (cmd_len != sizeof(struct l2cap_conn_param_update_req)) |
| 2891 | return -EPROTO; |
| 2892 | |
| 2893 | req = (struct l2cap_conn_param_update_req *) data; |
Gustavo F. Padovan | e2174ca | 2011-02-17 19:16:55 -0300 | [diff] [blame] | 2894 | min = __le16_to_cpu(req->min); |
| 2895 | max = __le16_to_cpu(req->max); |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 2896 | latency = __le16_to_cpu(req->latency); |
| 2897 | to_multiplier = __le16_to_cpu(req->to_multiplier); |
| 2898 | |
| 2899 | BT_DBG("min 0x%4.4x max 0x%4.4x latency: 0x%4.4x Timeout: 0x%4.4x", |
| 2900 | min, max, latency, to_multiplier); |
| 2901 | |
| 2902 | memset(&rsp, 0, sizeof(rsp)); |
Claudio Takahasi | 2ce603e | 2011-02-16 20:44:53 -0200 | [diff] [blame] | 2903 | |
| 2904 | err = l2cap_check_conn_param(min, max, latency, to_multiplier); |
| 2905 | if (err) |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 2906 | rsp.result = cpu_to_le16(L2CAP_CONN_PARAM_REJECTED); |
| 2907 | else |
| 2908 | rsp.result = cpu_to_le16(L2CAP_CONN_PARAM_ACCEPTED); |
| 2909 | |
| 2910 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_PARAM_UPDATE_RSP, |
| 2911 | sizeof(rsp), &rsp); |
| 2912 | |
Claudio Takahasi | 2ce603e | 2011-02-16 20:44:53 -0200 | [diff] [blame] | 2913 | if (!err) |
| 2914 | hci_le_conn_update(hcon, min, max, latency, to_multiplier); |
| 2915 | |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 2916 | return 0; |
| 2917 | } |
| 2918 | |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 2919 | static inline int l2cap_bredr_sig_cmd(struct l2cap_conn *conn, |
| 2920 | struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data) |
| 2921 | { |
| 2922 | int err = 0; |
| 2923 | |
| 2924 | switch (cmd->code) { |
| 2925 | case L2CAP_COMMAND_REJ: |
| 2926 | l2cap_command_rej(conn, cmd, data); |
| 2927 | break; |
| 2928 | |
| 2929 | case L2CAP_CONN_REQ: |
| 2930 | err = l2cap_connect_req(conn, cmd, data); |
| 2931 | break; |
| 2932 | |
| 2933 | case L2CAP_CONN_RSP: |
| 2934 | err = l2cap_connect_rsp(conn, cmd, data); |
| 2935 | break; |
| 2936 | |
| 2937 | case L2CAP_CONF_REQ: |
| 2938 | err = l2cap_config_req(conn, cmd, cmd_len, data); |
| 2939 | break; |
| 2940 | |
| 2941 | case L2CAP_CONF_RSP: |
| 2942 | err = l2cap_config_rsp(conn, cmd, data); |
| 2943 | break; |
| 2944 | |
| 2945 | case L2CAP_DISCONN_REQ: |
| 2946 | err = l2cap_disconnect_req(conn, cmd, data); |
| 2947 | break; |
| 2948 | |
| 2949 | case L2CAP_DISCONN_RSP: |
| 2950 | err = l2cap_disconnect_rsp(conn, cmd, data); |
| 2951 | break; |
| 2952 | |
| 2953 | case L2CAP_ECHO_REQ: |
| 2954 | l2cap_send_cmd(conn, cmd->ident, L2CAP_ECHO_RSP, cmd_len, data); |
| 2955 | break; |
| 2956 | |
| 2957 | case L2CAP_ECHO_RSP: |
| 2958 | break; |
| 2959 | |
| 2960 | case L2CAP_INFO_REQ: |
| 2961 | err = l2cap_information_req(conn, cmd, data); |
| 2962 | break; |
| 2963 | |
| 2964 | case L2CAP_INFO_RSP: |
| 2965 | err = l2cap_information_rsp(conn, cmd, data); |
| 2966 | break; |
| 2967 | |
| 2968 | default: |
| 2969 | BT_ERR("Unknown BR/EDR signaling command 0x%2.2x", cmd->code); |
| 2970 | err = -EINVAL; |
| 2971 | break; |
| 2972 | } |
| 2973 | |
| 2974 | return err; |
| 2975 | } |
| 2976 | |
| 2977 | static inline int l2cap_le_sig_cmd(struct l2cap_conn *conn, |
| 2978 | struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2979 | { |
| 2980 | switch (cmd->code) { |
| 2981 | case L2CAP_COMMAND_REJ: |
| 2982 | return 0; |
| 2983 | |
| 2984 | case L2CAP_CONN_PARAM_UPDATE_REQ: |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 2985 | return l2cap_conn_param_update_req(conn, cmd, data); |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 2986 | |
| 2987 | case L2CAP_CONN_PARAM_UPDATE_RSP: |
| 2988 | return 0; |
| 2989 | |
| 2990 | default: |
| 2991 | BT_ERR("Unknown LE signaling command 0x%2.2x", cmd->code); |
| 2992 | return -EINVAL; |
| 2993 | } |
| 2994 | } |
| 2995 | |
| 2996 | static inline void l2cap_sig_channel(struct l2cap_conn *conn, |
| 2997 | struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2998 | { |
| 2999 | u8 *data = skb->data; |
| 3000 | int len = skb->len; |
| 3001 | struct l2cap_cmd_hdr cmd; |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 3002 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3003 | |
| 3004 | l2cap_raw_recv(conn, skb); |
| 3005 | |
| 3006 | while (len >= L2CAP_CMD_HDR_SIZE) { |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3007 | u16 cmd_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3008 | memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); |
| 3009 | data += L2CAP_CMD_HDR_SIZE; |
| 3010 | len -= L2CAP_CMD_HDR_SIZE; |
| 3011 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3012 | cmd_len = le16_to_cpu(cmd.len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3013 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3014 | 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] | 3015 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3016 | if (cmd_len > len || !cmd.ident) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3017 | BT_DBG("corrupted command"); |
| 3018 | break; |
| 3019 | } |
| 3020 | |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 3021 | if (conn->hcon->type == LE_LINK) |
| 3022 | err = l2cap_le_sig_cmd(conn, &cmd, data); |
| 3023 | else |
| 3024 | err = l2cap_bredr_sig_cmd(conn, &cmd, cmd_len, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3025 | |
| 3026 | if (err) { |
| 3027 | struct l2cap_cmd_rej rej; |
Gustavo F. Padovan | 2c6d1a2 | 2011-03-23 14:38:32 -0300 | [diff] [blame] | 3028 | |
| 3029 | BT_ERR("Wrong link type (%d)", err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3030 | |
| 3031 | /* FIXME: Map err to a valid reason */ |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 3032 | rej.reason = cpu_to_le16(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3033 | l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); |
| 3034 | } |
| 3035 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3036 | data += cmd_len; |
| 3037 | len -= cmd_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3038 | } |
| 3039 | |
| 3040 | kfree_skb(skb); |
| 3041 | } |
| 3042 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3043 | 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] | 3044 | { |
| 3045 | u16 our_fcs, rcv_fcs; |
| 3046 | int hdr_size = L2CAP_HDR_SIZE + 2; |
| 3047 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3048 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3049 | skb_trim(skb, skb->len - 2); |
| 3050 | rcv_fcs = get_unaligned_le16(skb->data + skb->len); |
| 3051 | our_fcs = crc16(0, skb->data - hdr_size, skb->len + hdr_size); |
| 3052 | |
| 3053 | if (our_fcs != rcv_fcs) |
João Paulo Rechi Vita | 7a560e5 | 2010-06-22 13:56:27 -0300 | [diff] [blame] | 3054 | return -EBADMSG; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3055 | } |
| 3056 | return 0; |
| 3057 | } |
| 3058 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3059 | 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] | 3060 | { |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3061 | u16 control = 0; |
| 3062 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3063 | chan->frames_sent = 0; |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3064 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3065 | control |= chan->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3066 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3067 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
Gustavo F. Padovan | 6498886 | 2010-05-10 14:54:14 -0300 | [diff] [blame] | 3068 | control |= L2CAP_SUPER_RCV_NOT_READY; |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3069 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3070 | set_bit(CONN_RNR_SENT, &chan->conn_state); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3071 | } |
| 3072 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3073 | if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3074 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3075 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3076 | l2cap_ertm_send(chan); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3077 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3078 | if (!test_bit(CONN_LOCAL_BUSY, &chan->conn_state) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3079 | chan->frames_sent == 0) { |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3080 | control |= L2CAP_SUPER_RCV_READY; |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3081 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3082 | } |
| 3083 | } |
| 3084 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3085 | static int l2cap_add_to_srej_queue(struct l2cap_chan *chan, struct sk_buff *skb, u8 tx_seq, u8 sar) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3086 | { |
| 3087 | struct sk_buff *next_skb; |
João Paulo Rechi Vita | bfbacc1 | 2010-05-31 18:35:44 -0300 | [diff] [blame] | 3088 | int tx_seq_offset, next_tx_seq_offset; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3089 | |
| 3090 | bt_cb(skb)->tx_seq = tx_seq; |
| 3091 | bt_cb(skb)->sar = sar; |
| 3092 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3093 | next_skb = skb_peek(&chan->srej_q); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3094 | if (!next_skb) { |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3095 | __skb_queue_tail(&chan->srej_q, skb); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3096 | return 0; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3097 | } |
| 3098 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3099 | tx_seq_offset = (tx_seq - chan->buffer_seq) % 64; |
João Paulo Rechi Vita | bfbacc1 | 2010-05-31 18:35:44 -0300 | [diff] [blame] | 3100 | if (tx_seq_offset < 0) |
| 3101 | tx_seq_offset += 64; |
| 3102 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3103 | do { |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3104 | if (bt_cb(next_skb)->tx_seq == tx_seq) |
| 3105 | return -EINVAL; |
| 3106 | |
João Paulo Rechi Vita | bfbacc1 | 2010-05-31 18:35:44 -0300 | [diff] [blame] | 3107 | next_tx_seq_offset = (bt_cb(next_skb)->tx_seq - |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3108 | chan->buffer_seq) % 64; |
João Paulo Rechi Vita | bfbacc1 | 2010-05-31 18:35:44 -0300 | [diff] [blame] | 3109 | if (next_tx_seq_offset < 0) |
| 3110 | next_tx_seq_offset += 64; |
| 3111 | |
| 3112 | if (next_tx_seq_offset > tx_seq_offset) { |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3113 | __skb_queue_before(&chan->srej_q, next_skb, skb); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3114 | return 0; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3115 | } |
| 3116 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3117 | if (skb_queue_is_last(&chan->srej_q, next_skb)) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3118 | break; |
| 3119 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3120 | } while ((next_skb = skb_queue_next(&chan->srej_q, next_skb))); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3121 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3122 | __skb_queue_tail(&chan->srej_q, skb); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3123 | |
| 3124 | return 0; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3125 | } |
| 3126 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3127 | static int l2cap_ertm_reassembly_sdu(struct l2cap_chan *chan, struct sk_buff *skb, u16 control) |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3128 | { |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3129 | struct sk_buff *_skb; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3130 | int err; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3131 | |
| 3132 | switch (control & L2CAP_CTRL_SAR) { |
| 3133 | case L2CAP_SDU_UNSEGMENTED: |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3134 | if (test_bit(CONN_SAR_SDU, &chan->conn_state)) |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3135 | goto drop; |
| 3136 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 3137 | return chan->ops->recv(chan->data, skb); |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3138 | |
| 3139 | case L2CAP_SDU_START: |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3140 | if (test_bit(CONN_SAR_SDU, &chan->conn_state)) |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3141 | goto drop; |
| 3142 | |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3143 | chan->sdu_len = get_unaligned_le16(skb->data); |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3144 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3145 | if (chan->sdu_len > chan->imtu) |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3146 | goto disconnect; |
| 3147 | |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3148 | chan->sdu = bt_skb_alloc(chan->sdu_len, GFP_ATOMIC); |
| 3149 | if (!chan->sdu) |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3150 | return -ENOMEM; |
| 3151 | |
| 3152 | /* pull sdu_len bytes only after alloc, because of Local Busy |
| 3153 | * condition we have to be sure that this will be executed |
| 3154 | * only once, i.e., when alloc does not fail */ |
| 3155 | skb_pull(skb, 2); |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3156 | |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3157 | memcpy(skb_put(chan->sdu, skb->len), skb->data, skb->len); |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3158 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3159 | set_bit(CONN_SAR_SDU, &chan->conn_state); |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3160 | chan->partial_sdu_len = skb->len; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3161 | break; |
| 3162 | |
| 3163 | case L2CAP_SDU_CONTINUE: |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3164 | if (!test_bit(CONN_SAR_SDU, &chan->conn_state)) |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3165 | goto disconnect; |
| 3166 | |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3167 | if (!chan->sdu) |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3168 | goto disconnect; |
| 3169 | |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3170 | chan->partial_sdu_len += skb->len; |
| 3171 | if (chan->partial_sdu_len > chan->sdu_len) |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3172 | goto drop; |
| 3173 | |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3174 | memcpy(skb_put(chan->sdu, skb->len), skb->data, skb->len); |
Gustavo F. Padovan | 4178ba4 | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 3175 | |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3176 | break; |
| 3177 | |
| 3178 | case L2CAP_SDU_END: |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3179 | if (!test_bit(CONN_SAR_SDU, &chan->conn_state)) |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3180 | goto disconnect; |
| 3181 | |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3182 | if (!chan->sdu) |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3183 | goto disconnect; |
| 3184 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3185 | if (!test_bit(CONN_SAR_RETRY, &chan->conn_state)) { |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3186 | chan->partial_sdu_len += skb->len; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3187 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3188 | if (chan->partial_sdu_len > chan->imtu) |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3189 | goto drop; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3190 | |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3191 | if (chan->partial_sdu_len != chan->sdu_len) |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3192 | goto drop; |
Gustavo F. Padovan | 4178ba4 | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 3193 | |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3194 | memcpy(skb_put(chan->sdu, skb->len), skb->data, skb->len); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3195 | } |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3196 | |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3197 | _skb = skb_clone(chan->sdu, GFP_ATOMIC); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3198 | if (!_skb) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3199 | set_bit(CONN_SAR_RETRY, &chan->conn_state); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3200 | return -ENOMEM; |
| 3201 | } |
| 3202 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 3203 | err = chan->ops->recv(chan->data, _skb); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3204 | if (err < 0) { |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3205 | kfree_skb(_skb); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3206 | set_bit(CONN_SAR_RETRY, &chan->conn_state); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3207 | return err; |
| 3208 | } |
| 3209 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3210 | clear_bit(CONN_SAR_RETRY, &chan->conn_state); |
| 3211 | clear_bit(CONN_SAR_SDU, &chan->conn_state); |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3212 | |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3213 | kfree_skb(chan->sdu); |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3214 | break; |
| 3215 | } |
| 3216 | |
| 3217 | kfree_skb(skb); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3218 | return 0; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3219 | |
| 3220 | drop: |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3221 | kfree_skb(chan->sdu); |
| 3222 | chan->sdu = NULL; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3223 | |
| 3224 | disconnect: |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 3225 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3226 | kfree_skb(skb); |
| 3227 | return 0; |
| 3228 | } |
| 3229 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3230 | static int l2cap_try_push_rx_skb(struct l2cap_chan *chan) |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3231 | { |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3232 | struct sk_buff *skb; |
| 3233 | u16 control; |
Gustavo F. Padovan | 712132e | 2010-06-21 19:39:50 -0300 | [diff] [blame] | 3234 | int err; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3235 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3236 | while ((skb = skb_dequeue(&chan->busy_q))) { |
Gustavo F. Padovan | 712132e | 2010-06-21 19:39:50 -0300 | [diff] [blame] | 3237 | control = bt_cb(skb)->sar << L2CAP_CTRL_SAR_SHIFT; |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3238 | err = l2cap_ertm_reassembly_sdu(chan, skb, control); |
Gustavo F. Padovan | 712132e | 2010-06-21 19:39:50 -0300 | [diff] [blame] | 3239 | if (err < 0) { |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3240 | skb_queue_head(&chan->busy_q, skb); |
Gustavo F. Padovan | 712132e | 2010-06-21 19:39:50 -0300 | [diff] [blame] | 3241 | return -EBUSY; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3242 | } |
| 3243 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3244 | chan->buffer_seq = (chan->buffer_seq + 1) % 64; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3245 | } |
| 3246 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3247 | if (!test_bit(CONN_RNR_SENT, &chan->conn_state)) |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3248 | goto done; |
| 3249 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3250 | control = chan->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3251 | control |= L2CAP_SUPER_RCV_READY | L2CAP_CTRL_POLL; |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3252 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3253 | chan->retry_count = 1; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3254 | |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3255 | __clear_retrans_timer(chan); |
| 3256 | __set_monitor_timer(chan); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3257 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3258 | set_bit(CONN_WAIT_F, &chan->conn_state); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3259 | |
| 3260 | done: |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3261 | clear_bit(CONN_LOCAL_BUSY, &chan->conn_state); |
| 3262 | clear_bit(CONN_RNR_SENT, &chan->conn_state); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3263 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 3264 | BT_DBG("chan %p, Exit local busy", chan); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 3265 | |
Gustavo F. Padovan | 712132e | 2010-06-21 19:39:50 -0300 | [diff] [blame] | 3266 | return 0; |
| 3267 | } |
| 3268 | |
| 3269 | static void l2cap_busy_work(struct work_struct *work) |
| 3270 | { |
| 3271 | DECLARE_WAITQUEUE(wait, current); |
Gustavo F. Padovan | 311bb89 | 2011-03-25 20:41:00 -0300 | [diff] [blame] | 3272 | struct l2cap_chan *chan = |
| 3273 | container_of(work, struct l2cap_chan, busy_work); |
| 3274 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 712132e | 2010-06-21 19:39:50 -0300 | [diff] [blame] | 3275 | int n_tries = 0, timeo = HZ/5, err; |
| 3276 | struct sk_buff *skb; |
| 3277 | |
| 3278 | lock_sock(sk); |
| 3279 | |
| 3280 | add_wait_queue(sk_sleep(sk), &wait); |
Gustavo F. Padovan | 311bb89 | 2011-03-25 20:41:00 -0300 | [diff] [blame] | 3281 | while ((skb = skb_peek(&chan->busy_q))) { |
Gustavo F. Padovan | 712132e | 2010-06-21 19:39:50 -0300 | [diff] [blame] | 3282 | set_current_state(TASK_INTERRUPTIBLE); |
| 3283 | |
| 3284 | if (n_tries++ > L2CAP_LOCAL_BUSY_TRIES) { |
| 3285 | err = -EBUSY; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 3286 | l2cap_send_disconn_req(chan->conn, chan, EBUSY); |
Gustavo F. Padovan | 712132e | 2010-06-21 19:39:50 -0300 | [diff] [blame] | 3287 | break; |
| 3288 | } |
| 3289 | |
| 3290 | if (!timeo) |
| 3291 | timeo = HZ/5; |
| 3292 | |
| 3293 | if (signal_pending(current)) { |
| 3294 | err = sock_intr_errno(timeo); |
| 3295 | break; |
| 3296 | } |
| 3297 | |
| 3298 | release_sock(sk); |
| 3299 | timeo = schedule_timeout(timeo); |
| 3300 | lock_sock(sk); |
| 3301 | |
| 3302 | err = sock_error(sk); |
| 3303 | if (err) |
| 3304 | break; |
| 3305 | |
Gustavo F. Padovan | 311bb89 | 2011-03-25 20:41:00 -0300 | [diff] [blame] | 3306 | if (l2cap_try_push_rx_skb(chan) == 0) |
Gustavo F. Padovan | 712132e | 2010-06-21 19:39:50 -0300 | [diff] [blame] | 3307 | break; |
| 3308 | } |
| 3309 | |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3310 | set_current_state(TASK_RUNNING); |
Marcel Holtmann | 2b0b05d | 2010-05-10 11:33:10 +0200 | [diff] [blame] | 3311 | remove_wait_queue(sk_sleep(sk), &wait); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3312 | |
| 3313 | release_sock(sk); |
| 3314 | } |
| 3315 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3316 | static int l2cap_push_rx_skb(struct l2cap_chan *chan, struct sk_buff *skb, u16 control) |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3317 | { |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3318 | int sctrl, err; |
| 3319 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3320 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3321 | bt_cb(skb)->sar = control >> L2CAP_CTRL_SAR_SHIFT; |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3322 | __skb_queue_tail(&chan->busy_q, skb); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3323 | return l2cap_try_push_rx_skb(chan); |
Gustavo F. Padovan | 712132e | 2010-06-21 19:39:50 -0300 | [diff] [blame] | 3324 | |
| 3325 | |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3326 | } |
| 3327 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3328 | err = l2cap_ertm_reassembly_sdu(chan, skb, control); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3329 | if (err >= 0) { |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3330 | chan->buffer_seq = (chan->buffer_seq + 1) % 64; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3331 | return err; |
| 3332 | } |
| 3333 | |
| 3334 | /* Busy Condition */ |
Gustavo F. Padovan | 311bb89 | 2011-03-25 20:41:00 -0300 | [diff] [blame] | 3335 | BT_DBG("chan %p, Enter local busy", chan); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 3336 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3337 | set_bit(CONN_LOCAL_BUSY, &chan->conn_state); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3338 | bt_cb(skb)->sar = control >> L2CAP_CTRL_SAR_SHIFT; |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3339 | __skb_queue_tail(&chan->busy_q, skb); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3340 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3341 | sctrl = chan->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3342 | sctrl |= L2CAP_SUPER_RCV_NOT_READY; |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3343 | l2cap_send_sframe(chan, sctrl); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3344 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3345 | set_bit(CONN_RNR_SENT, &chan->conn_state); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3346 | |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3347 | __clear_ack_timer(chan); |
Gustavo F. Padovan | 7fe9b29 | 2010-05-12 18:32:04 -0300 | [diff] [blame] | 3348 | |
Gustavo F. Padovan | 311bb89 | 2011-03-25 20:41:00 -0300 | [diff] [blame] | 3349 | queue_work(_busy_wq, &chan->busy_work); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3350 | |
| 3351 | return err; |
| 3352 | } |
| 3353 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3354 | static int l2cap_streaming_reassembly_sdu(struct l2cap_chan *chan, struct sk_buff *skb, u16 control) |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3355 | { |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3356 | struct sk_buff *_skb; |
| 3357 | int err = -EINVAL; |
| 3358 | |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3359 | /* |
| 3360 | * TODO: We have to notify the userland if some data is lost with the |
| 3361 | * Streaming Mode. |
| 3362 | */ |
| 3363 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3364 | switch (control & L2CAP_CTRL_SAR) { |
| 3365 | case L2CAP_SDU_UNSEGMENTED: |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3366 | if (test_bit(CONN_SAR_SDU, &chan->conn_state)) { |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3367 | kfree_skb(chan->sdu); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3368 | break; |
| 3369 | } |
| 3370 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 3371 | err = chan->ops->recv(chan->data, skb); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3372 | if (!err) |
| 3373 | return 0; |
| 3374 | |
| 3375 | break; |
| 3376 | |
| 3377 | case L2CAP_SDU_START: |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3378 | if (test_bit(CONN_SAR_SDU, &chan->conn_state)) { |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3379 | kfree_skb(chan->sdu); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3380 | break; |
| 3381 | } |
| 3382 | |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3383 | chan->sdu_len = get_unaligned_le16(skb->data); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3384 | skb_pull(skb, 2); |
| 3385 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3386 | if (chan->sdu_len > chan->imtu) { |
Gustavo F. Padovan | 052897c | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 3387 | err = -EMSGSIZE; |
| 3388 | break; |
| 3389 | } |
| 3390 | |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3391 | chan->sdu = bt_skb_alloc(chan->sdu_len, GFP_ATOMIC); |
| 3392 | if (!chan->sdu) { |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3393 | err = -ENOMEM; |
| 3394 | break; |
| 3395 | } |
| 3396 | |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3397 | memcpy(skb_put(chan->sdu, skb->len), skb->data, skb->len); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3398 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3399 | set_bit(CONN_SAR_SDU, &chan->conn_state); |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3400 | chan->partial_sdu_len = skb->len; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3401 | err = 0; |
| 3402 | break; |
| 3403 | |
| 3404 | case L2CAP_SDU_CONTINUE: |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3405 | if (!test_bit(CONN_SAR_SDU, &chan->conn_state)) |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3406 | break; |
| 3407 | |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3408 | memcpy(skb_put(chan->sdu, skb->len), skb->data, skb->len); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3409 | |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3410 | chan->partial_sdu_len += skb->len; |
| 3411 | if (chan->partial_sdu_len > chan->sdu_len) |
| 3412 | kfree_skb(chan->sdu); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3413 | else |
| 3414 | err = 0; |
| 3415 | |
| 3416 | break; |
| 3417 | |
| 3418 | case L2CAP_SDU_END: |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3419 | if (!test_bit(CONN_SAR_SDU, &chan->conn_state)) |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3420 | break; |
| 3421 | |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3422 | memcpy(skb_put(chan->sdu, skb->len), skb->data, skb->len); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3423 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3424 | clear_bit(CONN_SAR_SDU, &chan->conn_state); |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3425 | chan->partial_sdu_len += skb->len; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3426 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3427 | if (chan->partial_sdu_len > chan->imtu) |
Gustavo F. Padovan | 36f2fd5 | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3428 | goto drop; |
| 3429 | |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3430 | if (chan->partial_sdu_len == chan->sdu_len) { |
| 3431 | _skb = skb_clone(chan->sdu, GFP_ATOMIC); |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 3432 | err = chan->ops->recv(chan->data, _skb); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3433 | if (err < 0) |
| 3434 | kfree_skb(_skb); |
| 3435 | } |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3436 | err = 0; |
| 3437 | |
Gustavo F. Padovan | 36f2fd5 | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3438 | drop: |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3439 | kfree_skb(chan->sdu); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3440 | break; |
| 3441 | } |
| 3442 | |
| 3443 | kfree_skb(skb); |
| 3444 | return err; |
| 3445 | } |
| 3446 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3447 | static void l2cap_check_srej_gap(struct l2cap_chan *chan, u8 tx_seq) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3448 | { |
| 3449 | struct sk_buff *skb; |
Gustavo F. Padovan | afefdbc | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 3450 | u16 control; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3451 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3452 | while ((skb = skb_peek(&chan->srej_q))) { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3453 | if (bt_cb(skb)->tx_seq != tx_seq) |
| 3454 | break; |
| 3455 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3456 | skb = skb_dequeue(&chan->srej_q); |
Gustavo F. Padovan | afefdbc | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 3457 | control = bt_cb(skb)->sar << L2CAP_CTRL_SAR_SHIFT; |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3458 | l2cap_ertm_reassembly_sdu(chan, skb, control); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3459 | chan->buffer_seq_srej = |
| 3460 | (chan->buffer_seq_srej + 1) % 64; |
Gustavo F. Padovan | 8ff50ec | 2010-05-10 19:34:11 -0300 | [diff] [blame] | 3461 | tx_seq = (tx_seq + 1) % 64; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3462 | } |
| 3463 | } |
| 3464 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3465 | static void l2cap_resend_srejframe(struct l2cap_chan *chan, u8 tx_seq) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3466 | { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3467 | struct srej_list *l, *tmp; |
| 3468 | u16 control; |
| 3469 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 3470 | list_for_each_entry_safe(l, tmp, &chan->srej_l, list) { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3471 | if (l->tx_seq == tx_seq) { |
| 3472 | list_del(&l->list); |
| 3473 | kfree(l); |
| 3474 | return; |
| 3475 | } |
| 3476 | control = L2CAP_SUPER_SELECT_REJECT; |
| 3477 | control |= l->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3478 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3479 | list_del(&l->list); |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 3480 | list_add_tail(&l->list, &chan->srej_l); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3481 | } |
| 3482 | } |
| 3483 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3484 | static void l2cap_send_srejframe(struct l2cap_chan *chan, u8 tx_seq) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3485 | { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3486 | struct srej_list *new; |
| 3487 | u16 control; |
| 3488 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3489 | while (tx_seq != chan->expected_tx_seq) { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3490 | control = L2CAP_SUPER_SELECT_REJECT; |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3491 | control |= chan->expected_tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3492 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3493 | |
| 3494 | new = kzalloc(sizeof(struct srej_list), GFP_ATOMIC); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3495 | new->tx_seq = chan->expected_tx_seq; |
| 3496 | chan->expected_tx_seq = (chan->expected_tx_seq + 1) % 64; |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 3497 | list_add_tail(&new->list, &chan->srej_l); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3498 | } |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3499 | chan->expected_tx_seq = (chan->expected_tx_seq + 1) % 64; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3500 | } |
| 3501 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3502 | static inline int l2cap_data_channel_iframe(struct l2cap_chan *chan, u16 rx_control, struct sk_buff *skb) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3503 | { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3504 | u8 tx_seq = __get_txseq(rx_control); |
Gustavo F. Padovan | 9f121a5 | 2009-10-03 02:34:38 -0300 | [diff] [blame] | 3505 | u8 req_seq = __get_reqseq(rx_control); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3506 | u8 sar = rx_control >> L2CAP_CTRL_SAR_SHIFT; |
Gustavo F. Padovan | f6337c7 | 2010-05-10 18:32:04 -0300 | [diff] [blame] | 3507 | int tx_seq_offset, expected_tx_seq_offset; |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3508 | int num_to_ack = (chan->tx_win/6) + 1; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3509 | int err = 0; |
| 3510 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3511 | BT_DBG("chan %p len %d tx_seq %d rx_control 0x%4.4x", chan, skb->len, |
| 3512 | tx_seq, rx_control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3513 | |
Gustavo F. Padovan | 9b16dc6 | 2010-05-05 20:05:57 -0300 | [diff] [blame] | 3514 | if (L2CAP_CTRL_FINAL & rx_control && |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3515 | test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3516 | __clear_monitor_timer(chan); |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3517 | if (chan->unacked_frames > 0) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3518 | __set_retrans_timer(chan); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3519 | clear_bit(CONN_WAIT_F, &chan->conn_state); |
Gustavo F. Padovan | 1d8f5d1 | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3520 | } |
| 3521 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3522 | chan->expected_ack_seq = req_seq; |
| 3523 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | 9f121a5 | 2009-10-03 02:34:38 -0300 | [diff] [blame] | 3524 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3525 | if (tx_seq == chan->expected_tx_seq) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3526 | goto expected; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3527 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3528 | tx_seq_offset = (tx_seq - chan->buffer_seq) % 64; |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3529 | if (tx_seq_offset < 0) |
| 3530 | tx_seq_offset += 64; |
| 3531 | |
| 3532 | /* invalid tx_seq */ |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3533 | if (tx_seq_offset >= chan->tx_win) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 3534 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3535 | goto drop; |
| 3536 | } |
| 3537 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3538 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3539 | goto drop; |
| 3540 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3541 | if (test_bit(CONN_SREJ_SENT, &chan->conn_state)) { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3542 | struct srej_list *first; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3543 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 3544 | first = list_first_entry(&chan->srej_l, |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3545 | struct srej_list, list); |
| 3546 | if (tx_seq == first->tx_seq) { |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3547 | l2cap_add_to_srej_queue(chan, skb, tx_seq, sar); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3548 | l2cap_check_srej_gap(chan, tx_seq); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3549 | |
| 3550 | list_del(&first->list); |
| 3551 | kfree(first); |
| 3552 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 3553 | if (list_empty(&chan->srej_l)) { |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3554 | chan->buffer_seq = chan->buffer_seq_srej; |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3555 | clear_bit(CONN_SREJ_SENT, &chan->conn_state); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3556 | l2cap_send_ack(chan); |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 3557 | BT_DBG("chan %p, Exit SREJ_SENT", chan); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3558 | } |
| 3559 | } else { |
| 3560 | struct srej_list *l; |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3561 | |
| 3562 | /* duplicated tx_seq */ |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3563 | 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] | 3564 | goto drop; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3565 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 3566 | list_for_each_entry(l, &chan->srej_l, list) { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3567 | if (l->tx_seq == tx_seq) { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3568 | l2cap_resend_srejframe(chan, tx_seq); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3569 | return 0; |
| 3570 | } |
| 3571 | } |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3572 | l2cap_send_srejframe(chan, tx_seq); |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3573 | } |
| 3574 | } else { |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3575 | expected_tx_seq_offset = |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3576 | (chan->expected_tx_seq - chan->buffer_seq) % 64; |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3577 | if (expected_tx_seq_offset < 0) |
| 3578 | expected_tx_seq_offset += 64; |
| 3579 | |
| 3580 | /* duplicated tx_seq */ |
| 3581 | if (tx_seq_offset < expected_tx_seq_offset) |
| 3582 | goto drop; |
| 3583 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3584 | set_bit(CONN_SREJ_SENT, &chan->conn_state); |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3585 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 3586 | BT_DBG("chan %p, Enter SREJ", chan); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 3587 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 3588 | INIT_LIST_HEAD(&chan->srej_l); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3589 | chan->buffer_seq_srej = chan->buffer_seq; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3590 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3591 | __skb_queue_head_init(&chan->srej_q); |
| 3592 | __skb_queue_head_init(&chan->busy_q); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3593 | l2cap_add_to_srej_queue(chan, skb, tx_seq, sar); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3594 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3595 | set_bit(CONN_SEND_PBIT, &chan->conn_state); |
Gustavo F. Padovan | ef54fd9 | 2009-08-20 22:26:04 -0300 | [diff] [blame] | 3596 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3597 | l2cap_send_srejframe(chan, tx_seq); |
Gustavo F. Padovan | 7fe9b29 | 2010-05-12 18:32:04 -0300 | [diff] [blame] | 3598 | |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3599 | __clear_ack_timer(chan); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3600 | } |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3601 | return 0; |
| 3602 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3603 | expected: |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3604 | chan->expected_tx_seq = (chan->expected_tx_seq + 1) % 64; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3605 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3606 | if (test_bit(CONN_SREJ_SENT, &chan->conn_state)) { |
Gustavo F. Padovan | 3b1a9f3 | 2010-05-01 16:15:42 -0300 | [diff] [blame] | 3607 | bt_cb(skb)->tx_seq = tx_seq; |
| 3608 | bt_cb(skb)->sar = sar; |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3609 | __skb_queue_tail(&chan->srej_q, skb); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3610 | return 0; |
| 3611 | } |
| 3612 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3613 | err = l2cap_push_rx_skb(chan, skb, rx_control); |
Gustavo F. Padovan | 2ece368 | 2010-06-16 17:21:44 -0300 | [diff] [blame] | 3614 | if (err < 0) |
| 3615 | return 0; |
| 3616 | |
Gustavo F. Padovan | 4ec10d9 | 2009-10-03 02:34:39 -0300 | [diff] [blame] | 3617 | if (rx_control & L2CAP_CTRL_FINAL) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3618 | if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3619 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | 4ec10d9 | 2009-10-03 02:34:39 -0300 | [diff] [blame] | 3620 | } |
| 3621 | |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3622 | __set_ack_timer(chan); |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3623 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3624 | chan->num_acked = (chan->num_acked + 1) % num_to_ack; |
| 3625 | if (chan->num_acked == num_to_ack - 1) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3626 | l2cap_send_ack(chan); |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3627 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3628 | return 0; |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3629 | |
| 3630 | drop: |
| 3631 | kfree_skb(skb); |
| 3632 | return 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3633 | } |
| 3634 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3635 | static inline void l2cap_data_channel_rrframe(struct l2cap_chan *chan, u16 rx_control) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3636 | { |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 3637 | BT_DBG("chan %p, req_seq %d ctrl 0x%4.4x", chan, __get_reqseq(rx_control), |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 3638 | rx_control); |
| 3639 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3640 | chan->expected_ack_seq = __get_reqseq(rx_control); |
| 3641 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3642 | |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3643 | if (rx_control & L2CAP_CTRL_POLL) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3644 | set_bit(CONN_SEND_FBIT, &chan->conn_state); |
| 3645 | if (test_bit(CONN_SREJ_SENT, &chan->conn_state)) { |
| 3646 | if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3647 | (chan->unacked_frames > 0)) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3648 | __set_retrans_timer(chan); |
Gustavo F. Padovan | 05fbd89 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3649 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3650 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3651 | l2cap_send_srejtail(chan); |
Gustavo F. Padovan | 05fbd89 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3652 | } else { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3653 | l2cap_send_i_or_rr_or_rnr(chan); |
Gustavo F. Padovan | 05fbd89 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3654 | } |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3655 | |
| 3656 | } else if (rx_control & L2CAP_CTRL_FINAL) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3657 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3658 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3659 | if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3660 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3661 | |
| 3662 | } else { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3663 | if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3664 | (chan->unacked_frames > 0)) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3665 | __set_retrans_timer(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3666 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3667 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
| 3668 | if (test_bit(CONN_SREJ_SENT, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3669 | l2cap_send_ack(chan); |
Andrei Emeltchenko | 894718a | 2010-12-01 16:58:24 +0200 | [diff] [blame] | 3670 | else |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3671 | l2cap_ertm_send(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3672 | } |
| 3673 | } |
| 3674 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3675 | static inline void l2cap_data_channel_rejframe(struct l2cap_chan *chan, u16 rx_control) |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3676 | { |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3677 | u8 tx_seq = __get_reqseq(rx_control); |
| 3678 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3679 | BT_DBG("chan %p, req_seq %d ctrl 0x%4.4x", chan, tx_seq, rx_control); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 3680 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3681 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3682 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3683 | chan->expected_ack_seq = tx_seq; |
| 3684 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3685 | |
| 3686 | if (rx_control & L2CAP_CTRL_FINAL) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3687 | if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3688 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3689 | } else { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3690 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3691 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3692 | if (test_bit(CONN_WAIT_F, &chan->conn_state)) |
| 3693 | set_bit(CONN_REJ_ACT, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3694 | } |
| 3695 | } |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3696 | static inline void l2cap_data_channel_srejframe(struct l2cap_chan *chan, u16 rx_control) |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3697 | { |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3698 | u8 tx_seq = __get_reqseq(rx_control); |
| 3699 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3700 | BT_DBG("chan %p, req_seq %d ctrl 0x%4.4x", chan, tx_seq, rx_control); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 3701 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3702 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3703 | |
| 3704 | if (rx_control & L2CAP_CTRL_POLL) { |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3705 | chan->expected_ack_seq = tx_seq; |
| 3706 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 3707 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3708 | set_bit(CONN_SEND_FBIT, &chan->conn_state); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3709 | l2cap_retransmit_one_frame(chan, tx_seq); |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 3710 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3711 | l2cap_ertm_send(chan); |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 3712 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3713 | if (test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3714 | chan->srej_save_reqseq = tx_seq; |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3715 | set_bit(CONN_SREJ_ACT, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3716 | } |
| 3717 | } else if (rx_control & L2CAP_CTRL_FINAL) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3718 | if (test_bit(CONN_SREJ_ACT, &chan->conn_state) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3719 | chan->srej_save_reqseq == tx_seq) |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3720 | clear_bit(CONN_SREJ_ACT, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3721 | else |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3722 | l2cap_retransmit_one_frame(chan, tx_seq); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3723 | } else { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3724 | l2cap_retransmit_one_frame(chan, tx_seq); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3725 | if (test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3726 | chan->srej_save_reqseq = tx_seq; |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3727 | set_bit(CONN_SREJ_ACT, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3728 | } |
| 3729 | } |
| 3730 | } |
| 3731 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3732 | static inline void l2cap_data_channel_rnrframe(struct l2cap_chan *chan, u16 rx_control) |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3733 | { |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3734 | u8 tx_seq = __get_reqseq(rx_control); |
| 3735 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3736 | BT_DBG("chan %p, req_seq %d ctrl 0x%4.4x", chan, tx_seq, rx_control); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 3737 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3738 | set_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3739 | chan->expected_ack_seq = tx_seq; |
| 3740 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3741 | |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 3742 | if (rx_control & L2CAP_CTRL_POLL) |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3743 | set_bit(CONN_SEND_FBIT, &chan->conn_state); |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 3744 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3745 | if (!test_bit(CONN_SREJ_SENT, &chan->conn_state)) { |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3746 | __clear_retrans_timer(chan); |
Gustavo F. Padovan | a2e12a2 | 2010-05-05 19:58:27 -0300 | [diff] [blame] | 3747 | if (rx_control & L2CAP_CTRL_POLL) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3748 | l2cap_send_rr_or_rnr(chan, L2CAP_CTRL_FINAL); |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3749 | return; |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3750 | } |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3751 | |
| 3752 | if (rx_control & L2CAP_CTRL_POLL) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3753 | l2cap_send_srejtail(chan); |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3754 | else |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3755 | l2cap_send_sframe(chan, L2CAP_SUPER_RCV_READY); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3756 | } |
| 3757 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3758 | static inline int l2cap_data_channel_sframe(struct l2cap_chan *chan, u16 rx_control, struct sk_buff *skb) |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3759 | { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3760 | BT_DBG("chan %p rx_control 0x%4.4x len %d", chan, rx_control, skb->len); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3761 | |
Gustavo F. Padovan | 9b16dc6 | 2010-05-05 20:05:57 -0300 | [diff] [blame] | 3762 | if (L2CAP_CTRL_FINAL & rx_control && |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3763 | test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3764 | __clear_monitor_timer(chan); |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3765 | if (chan->unacked_frames > 0) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3766 | __set_retrans_timer(chan); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3767 | clear_bit(CONN_WAIT_F, &chan->conn_state); |
Gustavo F. Padovan | 1d8f5d1 | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3768 | } |
| 3769 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3770 | switch (rx_control & L2CAP_CTRL_SUPERVISE) { |
| 3771 | case L2CAP_SUPER_RCV_READY: |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3772 | l2cap_data_channel_rrframe(chan, rx_control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3773 | break; |
| 3774 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3775 | case L2CAP_SUPER_REJECT: |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3776 | l2cap_data_channel_rejframe(chan, rx_control); |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3777 | break; |
| 3778 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3779 | case L2CAP_SUPER_SELECT_REJECT: |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3780 | l2cap_data_channel_srejframe(chan, rx_control); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3781 | break; |
| 3782 | |
| 3783 | case L2CAP_SUPER_RCV_NOT_READY: |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3784 | l2cap_data_channel_rnrframe(chan, rx_control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3785 | break; |
| 3786 | } |
| 3787 | |
Gustavo F. Padovan | faaebd1 | 2010-05-01 16:15:35 -0300 | [diff] [blame] | 3788 | kfree_skb(skb); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3789 | return 0; |
| 3790 | } |
| 3791 | |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3792 | static int l2cap_ertm_data_rcv(struct sock *sk, struct sk_buff *skb) |
| 3793 | { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3794 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3795 | u16 control; |
| 3796 | u8 req_seq; |
| 3797 | int len, next_tx_seq_offset, req_seq_offset; |
| 3798 | |
| 3799 | control = get_unaligned_le16(skb->data); |
| 3800 | skb_pull(skb, 2); |
| 3801 | len = skb->len; |
| 3802 | |
| 3803 | /* |
| 3804 | * We can just drop the corrupted I-frame here. |
| 3805 | * Receiver will miss it and start proper recovery |
| 3806 | * procedures and ask retransmission. |
| 3807 | */ |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3808 | if (l2cap_check_fcs(chan, skb)) |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3809 | goto drop; |
| 3810 | |
| 3811 | if (__is_sar_start(control) && __is_iframe(control)) |
| 3812 | len -= 2; |
| 3813 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3814 | if (chan->fcs == L2CAP_FCS_CRC16) |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3815 | len -= 2; |
| 3816 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3817 | if (len > chan->mps) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 3818 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3819 | goto drop; |
| 3820 | } |
| 3821 | |
| 3822 | req_seq = __get_reqseq(control); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3823 | req_seq_offset = (req_seq - chan->expected_ack_seq) % 64; |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3824 | if (req_seq_offset < 0) |
| 3825 | req_seq_offset += 64; |
| 3826 | |
| 3827 | next_tx_seq_offset = |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3828 | (chan->next_tx_seq - chan->expected_ack_seq) % 64; |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3829 | if (next_tx_seq_offset < 0) |
| 3830 | next_tx_seq_offset += 64; |
| 3831 | |
| 3832 | /* check for invalid req-seq */ |
| 3833 | if (req_seq_offset > next_tx_seq_offset) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 3834 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3835 | goto drop; |
| 3836 | } |
| 3837 | |
| 3838 | if (__is_iframe(control)) { |
| 3839 | if (len < 0) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 3840 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3841 | goto drop; |
| 3842 | } |
| 3843 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3844 | l2cap_data_channel_iframe(chan, control, skb); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3845 | } else { |
| 3846 | if (len != 0) { |
| 3847 | BT_ERR("%d", len); |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 3848 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3849 | goto drop; |
| 3850 | } |
| 3851 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3852 | l2cap_data_channel_sframe(chan, control, skb); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3853 | } |
| 3854 | |
| 3855 | return 0; |
| 3856 | |
| 3857 | drop: |
| 3858 | kfree_skb(skb); |
| 3859 | return 0; |
| 3860 | } |
| 3861 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3862 | static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) |
| 3863 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3864 | struct l2cap_chan *chan; |
David S. Miller | bf73484 | 2011-04-25 13:03:02 -0700 | [diff] [blame] | 3865 | struct sock *sk = NULL; |
Nathan Holstein | 51893f8 | 2010-06-09 15:46:25 -0400 | [diff] [blame] | 3866 | u16 control; |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3867 | u8 tx_seq; |
| 3868 | int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3869 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 3870 | chan = l2cap_get_chan_by_scid(conn, cid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3871 | if (!chan) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3872 | BT_DBG("unknown cid 0x%4.4x", cid); |
| 3873 | goto drop; |
| 3874 | } |
| 3875 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3876 | sk = chan->sk; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3877 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 3878 | BT_DBG("chan %p, len %d", chan, skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3879 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 3880 | if (chan->state != BT_CONNECTED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3881 | goto drop; |
| 3882 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3883 | switch (chan->mode) { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3884 | case L2CAP_MODE_BASIC: |
| 3885 | /* If socket recv buffers overflows we drop data here |
| 3886 | * which is *bad* because L2CAP has to be reliable. |
| 3887 | * But we don't have any other choice. L2CAP doesn't |
| 3888 | * provide flow control mechanism. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3889 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3890 | if (chan->imtu < skb->len) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3891 | goto drop; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3892 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 3893 | if (!chan->ops->recv(chan->data, skb)) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3894 | goto done; |
| 3895 | break; |
| 3896 | |
| 3897 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3898 | if (!sock_owned_by_user(sk)) { |
| 3899 | l2cap_ertm_data_rcv(sk, skb); |
Gustavo F. Padovan | 277ffbe | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3900 | } else { |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3901 | if (sk_add_backlog(sk, skb)) |
Gustavo F. Padovan | 277ffbe | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3902 | goto drop; |
Gustavo F. Padovan | 277ffbe | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3903 | } |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3904 | |
Andrei Emeltchenko | fcafde2 | 2009-12-22 15:58:08 +0200 | [diff] [blame] | 3905 | goto done; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3906 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3907 | case L2CAP_MODE_STREAMING: |
| 3908 | control = get_unaligned_le16(skb->data); |
| 3909 | skb_pull(skb, 2); |
| 3910 | len = skb->len; |
| 3911 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3912 | if (l2cap_check_fcs(chan, skb)) |
Gustavo F. Padovan | 2600008 | 2010-05-11 22:02:00 -0300 | [diff] [blame] | 3913 | goto drop; |
| 3914 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3915 | if (__is_sar_start(control)) |
| 3916 | len -= 2; |
| 3917 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3918 | if (chan->fcs == L2CAP_FCS_CRC16) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3919 | len -= 2; |
| 3920 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3921 | if (len > chan->mps || len < 0 || __is_sframe(control)) |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3922 | goto drop; |
| 3923 | |
| 3924 | tx_seq = __get_txseq(control); |
| 3925 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3926 | if (chan->expected_tx_seq == tx_seq) |
| 3927 | chan->expected_tx_seq = (chan->expected_tx_seq + 1) % 64; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3928 | else |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3929 | chan->expected_tx_seq = (tx_seq + 1) % 64; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3930 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3931 | l2cap_streaming_reassembly_sdu(chan, skb, control); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3932 | |
| 3933 | goto done; |
| 3934 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3935 | default: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3936 | 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] | 3937 | break; |
| 3938 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3939 | |
| 3940 | drop: |
| 3941 | kfree_skb(skb); |
| 3942 | |
| 3943 | done: |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 3944 | if (sk) |
| 3945 | bh_unlock_sock(sk); |
| 3946 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3947 | return 0; |
| 3948 | } |
| 3949 | |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 3950 | 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] | 3951 | { |
David S. Miller | 6dcae1e | 2011-05-16 23:09:26 -0400 | [diff] [blame] | 3952 | struct sock *sk = NULL; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 3953 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3954 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 3955 | chan = l2cap_global_chan_by_psm(0, psm, conn->src); |
| 3956 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3957 | goto drop; |
| 3958 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 3959 | sk = chan->sk; |
| 3960 | |
Gustavo F. Padovan | e0f0cb5 | 2010-11-01 18:43:53 +0000 | [diff] [blame] | 3961 | bh_lock_sock(sk); |
| 3962 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3963 | BT_DBG("sk %p, len %d", sk, skb->len); |
| 3964 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 3965 | if (chan->state != BT_BOUND && chan->state != BT_CONNECTED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3966 | goto drop; |
| 3967 | |
Vinicius Costa Gomes | e13e21d | 2011-06-17 22:46:27 -0300 | [diff] [blame] | 3968 | if (chan->imtu < skb->len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3969 | goto drop; |
| 3970 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 3971 | if (!chan->ops->recv(chan->data, skb)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3972 | goto done; |
| 3973 | |
| 3974 | drop: |
| 3975 | kfree_skb(skb); |
| 3976 | |
| 3977 | done: |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 3978 | if (sk) |
| 3979 | bh_unlock_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3980 | return 0; |
| 3981 | } |
| 3982 | |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 3983 | static inline int l2cap_att_channel(struct l2cap_conn *conn, __le16 cid, struct sk_buff *skb) |
| 3984 | { |
David S. Miller | 6dcae1e | 2011-05-16 23:09:26 -0400 | [diff] [blame] | 3985 | struct sock *sk = NULL; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 3986 | struct l2cap_chan *chan; |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 3987 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 3988 | chan = l2cap_global_chan_by_scid(0, cid, conn->src); |
| 3989 | if (!chan) |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 3990 | goto drop; |
| 3991 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 3992 | sk = chan->sk; |
| 3993 | |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 3994 | bh_lock_sock(sk); |
| 3995 | |
| 3996 | BT_DBG("sk %p, len %d", sk, skb->len); |
| 3997 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 3998 | if (chan->state != BT_BOUND && chan->state != BT_CONNECTED) |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 3999 | goto drop; |
| 4000 | |
Vinicius Costa Gomes | e13e21d | 2011-06-17 22:46:27 -0300 | [diff] [blame] | 4001 | if (chan->imtu < skb->len) |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4002 | goto drop; |
| 4003 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 4004 | if (!chan->ops->recv(chan->data, skb)) |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4005 | goto done; |
| 4006 | |
| 4007 | drop: |
| 4008 | kfree_skb(skb); |
| 4009 | |
| 4010 | done: |
| 4011 | if (sk) |
| 4012 | bh_unlock_sock(sk); |
| 4013 | return 0; |
| 4014 | } |
| 4015 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4016 | static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) |
| 4017 | { |
| 4018 | struct l2cap_hdr *lh = (void *) skb->data; |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 4019 | u16 cid, len; |
| 4020 | __le16 psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4021 | |
| 4022 | skb_pull(skb, L2CAP_HDR_SIZE); |
| 4023 | cid = __le16_to_cpu(lh->cid); |
| 4024 | len = __le16_to_cpu(lh->len); |
| 4025 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4026 | if (len != skb->len) { |
| 4027 | kfree_skb(skb); |
| 4028 | return; |
| 4029 | } |
| 4030 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4031 | BT_DBG("len %d, cid 0x%4.4x", len, cid); |
| 4032 | |
| 4033 | switch (cid) { |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 4034 | case L2CAP_CID_LE_SIGNALING: |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 4035 | case L2CAP_CID_SIGNALING: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4036 | l2cap_sig_channel(conn, skb); |
| 4037 | break; |
| 4038 | |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 4039 | case L2CAP_CID_CONN_LESS: |
Gustavo F. Padovan | 1b7bf4e | 2009-08-24 00:45:20 -0300 | [diff] [blame] | 4040 | psm = get_unaligned_le16(skb->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4041 | skb_pull(skb, 2); |
| 4042 | l2cap_conless_channel(conn, psm, skb); |
| 4043 | break; |
| 4044 | |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 4045 | case L2CAP_CID_LE_DATA: |
| 4046 | l2cap_att_channel(conn, cid, skb); |
| 4047 | break; |
| 4048 | |
Anderson Briglia | b501d6a | 2011-06-07 18:46:31 -0300 | [diff] [blame] | 4049 | case L2CAP_CID_SMP: |
| 4050 | if (smp_sig_channel(conn, skb)) |
| 4051 | l2cap_conn_del(conn->hcon, EACCES); |
| 4052 | break; |
| 4053 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4054 | default: |
| 4055 | l2cap_data_channel(conn, cid, skb); |
| 4056 | break; |
| 4057 | } |
| 4058 | } |
| 4059 | |
| 4060 | /* ---- L2CAP interface with lower layer (HCI) ---- */ |
| 4061 | |
| 4062 | static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) |
| 4063 | { |
| 4064 | int exact = 0, lm1 = 0, lm2 = 0; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4065 | struct l2cap_chan *c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4066 | |
| 4067 | if (type != ACL_LINK) |
João Paulo Rechi Vita | 963cf68 | 2010-06-22 13:56:28 -0300 | [diff] [blame] | 4068 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4069 | |
| 4070 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); |
| 4071 | |
| 4072 | /* Find listening sockets and check their link_mode */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4073 | read_lock(&chan_list_lock); |
| 4074 | list_for_each_entry(c, &chan_list, global_l) { |
| 4075 | struct sock *sk = c->sk; |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4076 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4077 | if (c->state != BT_LISTEN) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4078 | continue; |
| 4079 | |
| 4080 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 4081 | lm1 |= HCI_LM_ACCEPT; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4082 | if (c->role_switch) |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 4083 | lm1 |= HCI_LM_MASTER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4084 | exact++; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 4085 | } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { |
| 4086 | lm2 |= HCI_LM_ACCEPT; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4087 | if (c->role_switch) |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 4088 | lm2 |= HCI_LM_MASTER; |
| 4089 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4090 | } |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4091 | read_unlock(&chan_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4092 | |
| 4093 | return exact ? lm1 : lm2; |
| 4094 | } |
| 4095 | |
| 4096 | static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) |
| 4097 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4098 | struct l2cap_conn *conn; |
| 4099 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4100 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); |
| 4101 | |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 4102 | if (!(hcon->type == ACL_LINK || hcon->type == LE_LINK)) |
João Paulo Rechi Vita | 963cf68 | 2010-06-22 13:56:28 -0300 | [diff] [blame] | 4103 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4104 | |
| 4105 | if (!status) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4106 | conn = l2cap_conn_add(hcon, status); |
| 4107 | if (conn) |
| 4108 | l2cap_conn_ready(conn); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4109 | } else |
Joe Perches | e175072 | 2011-06-29 18:18:29 -0700 | [diff] [blame] | 4110 | l2cap_conn_del(hcon, bt_to_errno(status)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4111 | |
| 4112 | return 0; |
| 4113 | } |
| 4114 | |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 4115 | static int l2cap_disconn_ind(struct hci_conn *hcon) |
| 4116 | { |
| 4117 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 4118 | |
| 4119 | BT_DBG("hcon %p", hcon); |
| 4120 | |
Gustavo F. Padovan | b569450 | 2011-06-08 19:09:13 -0300 | [diff] [blame] | 4121 | if ((hcon->type != ACL_LINK && hcon->type != LE_LINK) || !conn) |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 4122 | return 0x13; |
| 4123 | |
| 4124 | return conn->disc_reason; |
| 4125 | } |
| 4126 | |
| 4127 | static int l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4128 | { |
| 4129 | BT_DBG("hcon %p reason %d", hcon, reason); |
| 4130 | |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 4131 | if (!(hcon->type == ACL_LINK || hcon->type == LE_LINK)) |
João Paulo Rechi Vita | 963cf68 | 2010-06-22 13:56:28 -0300 | [diff] [blame] | 4132 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4133 | |
Joe Perches | e175072 | 2011-06-29 18:18:29 -0700 | [diff] [blame] | 4134 | l2cap_conn_del(hcon, bt_to_errno(reason)); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4135 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4136 | return 0; |
| 4137 | } |
| 4138 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4139 | static inline void l2cap_check_encryption(struct l2cap_chan *chan, u8 encrypt) |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4140 | { |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 4141 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) |
Marcel Holtmann | 255c760 | 2009-02-04 21:07:19 +0100 | [diff] [blame] | 4142 | return; |
| 4143 | |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4144 | if (encrypt == 0x00) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4145 | if (chan->sec_level == BT_SECURITY_MEDIUM) { |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 4146 | __clear_chan_timer(chan); |
| 4147 | __set_chan_timer(chan, HZ * 5); |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4148 | } else if (chan->sec_level == BT_SECURITY_HIGH) |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 4149 | l2cap_chan_close(chan, ECONNREFUSED); |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4150 | } else { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4151 | if (chan->sec_level == BT_SECURITY_MEDIUM) |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 4152 | __clear_chan_timer(chan); |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4153 | } |
| 4154 | } |
| 4155 | |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 4156 | 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] | 4157 | { |
Marcel Holtmann | 40be492 | 2008-07-14 20:13:50 +0200 | [diff] [blame] | 4158 | struct l2cap_conn *conn = hcon->l2cap_data; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4159 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4160 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4161 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4162 | return 0; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4163 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4164 | BT_DBG("conn %p", conn); |
| 4165 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 4166 | read_lock(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4167 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 4168 | list_for_each_entry(chan, &conn->chan_l, list) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4169 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 4170 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4171 | bh_lock_sock(sk); |
| 4172 | |
Vinicius Costa Gomes | f1cb9af | 2011-01-26 21:42:57 -0300 | [diff] [blame] | 4173 | BT_DBG("chan->scid %d", chan->scid); |
| 4174 | |
| 4175 | if (chan->scid == L2CAP_CID_LE_DATA) { |
| 4176 | if (!status && encrypt) { |
| 4177 | chan->sec_level = hcon->sec_level; |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 4178 | del_timer(&conn->security_timer); |
Vinicius Costa Gomes | f1cb9af | 2011-01-26 21:42:57 -0300 | [diff] [blame] | 4179 | l2cap_chan_ready(sk); |
| 4180 | } |
| 4181 | |
| 4182 | bh_unlock_sock(sk); |
| 4183 | continue; |
| 4184 | } |
| 4185 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 4186 | if (test_bit(CONF_CONNECT_PEND, &chan->conf_state)) { |
Marcel Holtmann | 6a8d301 | 2009-02-06 23:56:36 +0100 | [diff] [blame] | 4187 | bh_unlock_sock(sk); |
| 4188 | continue; |
| 4189 | } |
| 4190 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4191 | if (!status && (chan->state == BT_CONNECTED || |
| 4192 | chan->state == BT_CONFIG)) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4193 | l2cap_check_encryption(chan, encrypt); |
Marcel Holtmann | 9719f8a | 2008-07-14 20:13:45 +0200 | [diff] [blame] | 4194 | bh_unlock_sock(sk); |
| 4195 | continue; |
| 4196 | } |
| 4197 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4198 | if (chan->state == BT_CONNECT) { |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4199 | if (!status) { |
| 4200 | struct l2cap_conn_req req; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 4201 | req.scid = cpu_to_le16(chan->scid); |
| 4202 | req.psm = chan->psm; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4203 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 4204 | chan->ident = l2cap_get_ident(conn); |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 4205 | set_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4206 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 4207 | l2cap_send_cmd(conn, chan->ident, |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4208 | L2CAP_CONN_REQ, sizeof(req), &req); |
| 4209 | } else { |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 4210 | __clear_chan_timer(chan); |
| 4211 | __set_chan_timer(chan, HZ / 10); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4212 | } |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4213 | } else if (chan->state == BT_CONNECT2) { |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4214 | struct l2cap_conn_rsp rsp; |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4215 | __u16 res, stat; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4216 | |
| 4217 | if (!status) { |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4218 | if (bt_sk(sk)->defer_setup) { |
| 4219 | struct sock *parent = bt_sk(sk)->parent; |
| 4220 | res = L2CAP_CR_PEND; |
| 4221 | stat = L2CAP_CS_AUTHOR_PEND; |
| 4222 | parent->sk_data_ready(parent, 0); |
| 4223 | } else { |
Gustavo F. Padovan | 0555891 | 2011-06-21 14:52:56 -0300 | [diff] [blame] | 4224 | l2cap_state_change(chan, BT_CONFIG); |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4225 | res = L2CAP_CR_SUCCESS; |
| 4226 | stat = L2CAP_CS_NO_INFO; |
| 4227 | } |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4228 | } else { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4229 | l2cap_state_change(chan, BT_DISCONN); |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 4230 | __set_chan_timer(chan, HZ / 10); |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4231 | res = L2CAP_CR_SEC_BLOCK; |
| 4232 | stat = L2CAP_CS_NO_INFO; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4233 | } |
| 4234 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 4235 | rsp.scid = cpu_to_le16(chan->dcid); |
| 4236 | rsp.dcid = cpu_to_le16(chan->scid); |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4237 | rsp.result = cpu_to_le16(res); |
| 4238 | rsp.status = cpu_to_le16(stat); |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 4239 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, |
| 4240 | sizeof(rsp), &rsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4241 | } |
| 4242 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4243 | bh_unlock_sock(sk); |
| 4244 | } |
| 4245 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 4246 | read_unlock(&conn->chan_lock); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4247 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4248 | return 0; |
| 4249 | } |
| 4250 | |
| 4251 | static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) |
| 4252 | { |
| 4253 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 4254 | |
Andrei Emeltchenko | 5a08ecc | 2011-01-11 17:20:20 +0200 | [diff] [blame] | 4255 | if (!conn) |
| 4256 | conn = l2cap_conn_add(hcon, 0); |
| 4257 | |
| 4258 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4259 | goto drop; |
| 4260 | |
| 4261 | BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); |
| 4262 | |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 4263 | if (!(flags & ACL_CONT)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4264 | struct l2cap_hdr *hdr; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4265 | struct l2cap_chan *chan; |
Andrei Emeltchenko | 8979481 | 2010-09-15 14:28:44 +0300 | [diff] [blame] | 4266 | u16 cid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4267 | int len; |
| 4268 | |
| 4269 | if (conn->rx_len) { |
| 4270 | BT_ERR("Unexpected start frame (len %d)", skb->len); |
| 4271 | kfree_skb(conn->rx_skb); |
| 4272 | conn->rx_skb = NULL; |
| 4273 | conn->rx_len = 0; |
| 4274 | l2cap_conn_unreliable(conn, ECOMM); |
| 4275 | } |
| 4276 | |
Andrei Emeltchenko | aae7fe2 | 2010-09-15 14:28:43 +0300 | [diff] [blame] | 4277 | /* Start fragment always begin with Basic L2CAP header */ |
| 4278 | if (skb->len < L2CAP_HDR_SIZE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4279 | BT_ERR("Frame is too short (len %d)", skb->len); |
| 4280 | l2cap_conn_unreliable(conn, ECOMM); |
| 4281 | goto drop; |
| 4282 | } |
| 4283 | |
| 4284 | hdr = (struct l2cap_hdr *) skb->data; |
| 4285 | len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; |
Andrei Emeltchenko | 8979481 | 2010-09-15 14:28:44 +0300 | [diff] [blame] | 4286 | cid = __le16_to_cpu(hdr->cid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4287 | |
| 4288 | if (len == skb->len) { |
| 4289 | /* Complete frame received */ |
| 4290 | l2cap_recv_frame(conn, skb); |
| 4291 | return 0; |
| 4292 | } |
| 4293 | |
| 4294 | BT_DBG("Start: total len %d, frag len %d", len, skb->len); |
| 4295 | |
| 4296 | if (skb->len > len) { |
| 4297 | BT_ERR("Frame is too long (len %d, expected len %d)", |
| 4298 | skb->len, len); |
| 4299 | l2cap_conn_unreliable(conn, ECOMM); |
| 4300 | goto drop; |
| 4301 | } |
| 4302 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 4303 | chan = l2cap_get_chan_by_scid(conn, cid); |
Andrei Emeltchenko | 8979481 | 2010-09-15 14:28:44 +0300 | [diff] [blame] | 4304 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4305 | if (chan && chan->sk) { |
| 4306 | struct sock *sk = chan->sk; |
| 4307 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 4308 | if (chan->imtu < len - L2CAP_HDR_SIZE) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4309 | BT_ERR("Frame exceeding recv MTU (len %d, " |
| 4310 | "MTU %d)", len, |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 4311 | chan->imtu); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4312 | bh_unlock_sock(sk); |
| 4313 | l2cap_conn_unreliable(conn, ECOMM); |
| 4314 | goto drop; |
| 4315 | } |
Andrei Emeltchenko | 8979481 | 2010-09-15 14:28:44 +0300 | [diff] [blame] | 4316 | bh_unlock_sock(sk); |
Andrei Emeltchenko | 8979481 | 2010-09-15 14:28:44 +0300 | [diff] [blame] | 4317 | } |
| 4318 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4319 | /* Allocate skb for the complete frame (with header) */ |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 4320 | conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC); |
| 4321 | if (!conn->rx_skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4322 | goto drop; |
| 4323 | |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 4324 | 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] | 4325 | skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4326 | conn->rx_len = len - skb->len; |
| 4327 | } else { |
| 4328 | BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); |
| 4329 | |
| 4330 | if (!conn->rx_len) { |
| 4331 | BT_ERR("Unexpected continuation frame (len %d)", skb->len); |
| 4332 | l2cap_conn_unreliable(conn, ECOMM); |
| 4333 | goto drop; |
| 4334 | } |
| 4335 | |
| 4336 | if (skb->len > conn->rx_len) { |
| 4337 | BT_ERR("Fragment is too long (len %d, expected %d)", |
| 4338 | skb->len, conn->rx_len); |
| 4339 | kfree_skb(conn->rx_skb); |
| 4340 | conn->rx_skb = NULL; |
| 4341 | conn->rx_len = 0; |
| 4342 | l2cap_conn_unreliable(conn, ECOMM); |
| 4343 | goto drop; |
| 4344 | } |
| 4345 | |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 4346 | 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] | 4347 | skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4348 | conn->rx_len -= skb->len; |
| 4349 | |
| 4350 | if (!conn->rx_len) { |
| 4351 | /* Complete frame received */ |
| 4352 | l2cap_recv_frame(conn, conn->rx_skb); |
| 4353 | conn->rx_skb = NULL; |
| 4354 | } |
| 4355 | } |
| 4356 | |
| 4357 | drop: |
| 4358 | kfree_skb(skb); |
| 4359 | return 0; |
| 4360 | } |
| 4361 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4362 | static int l2cap_debugfs_show(struct seq_file *f, void *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4363 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4364 | struct l2cap_chan *c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4365 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4366 | read_lock_bh(&chan_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4367 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4368 | list_for_each_entry(c, &chan_list, global_l) { |
| 4369 | struct sock *sk = c->sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4370 | |
Gustavo F. Padovan | 903d343 | 2011-02-10 14:16:06 -0200 | [diff] [blame] | 4371 | 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] | 4372 | batostr(&bt_sk(sk)->src), |
| 4373 | batostr(&bt_sk(sk)->dst), |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4374 | c->state, __le16_to_cpu(c->psm), |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4375 | c->scid, c->dcid, c->imtu, c->omtu, |
| 4376 | c->sec_level, c->mode); |
Gustavo F. Padovan | 0555891 | 2011-06-21 14:52:56 -0300 | [diff] [blame] | 4377 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4378 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4379 | read_unlock_bh(&chan_list_lock); |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 4380 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4381 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4382 | } |
| 4383 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4384 | static int l2cap_debugfs_open(struct inode *inode, struct file *file) |
| 4385 | { |
| 4386 | return single_open(file, l2cap_debugfs_show, inode->i_private); |
| 4387 | } |
| 4388 | |
| 4389 | static const struct file_operations l2cap_debugfs_fops = { |
| 4390 | .open = l2cap_debugfs_open, |
| 4391 | .read = seq_read, |
| 4392 | .llseek = seq_lseek, |
| 4393 | .release = single_release, |
| 4394 | }; |
| 4395 | |
| 4396 | static struct dentry *l2cap_debugfs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4397 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4398 | static struct hci_proto l2cap_hci_proto = { |
| 4399 | .name = "L2CAP", |
| 4400 | .id = HCI_PROTO_L2CAP, |
| 4401 | .connect_ind = l2cap_connect_ind, |
| 4402 | .connect_cfm = l2cap_connect_cfm, |
| 4403 | .disconn_ind = l2cap_disconn_ind, |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 4404 | .disconn_cfm = l2cap_disconn_cfm, |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 4405 | .security_cfm = l2cap_security_cfm, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4406 | .recv_acldata = l2cap_recv_acldata |
| 4407 | }; |
| 4408 | |
Gustavo F. Padovan | 6427451 | 2011-02-07 20:08:52 -0200 | [diff] [blame] | 4409 | int __init l2cap_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4410 | { |
| 4411 | int err; |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 4412 | |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 4413 | err = l2cap_init_sockets(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4414 | if (err < 0) |
| 4415 | return err; |
| 4416 | |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4417 | _busy_wq = create_singlethread_workqueue("l2cap"); |
Anderson Lizardo | b78d7b4f | 2010-11-29 12:15:50 -0400 | [diff] [blame] | 4418 | if (!_busy_wq) { |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 4419 | err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4420 | goto error; |
| 4421 | } |
| 4422 | |
| 4423 | err = hci_register_proto(&l2cap_hci_proto); |
| 4424 | if (err < 0) { |
| 4425 | BT_ERR("L2CAP protocol registration failed"); |
| 4426 | bt_sock_unregister(BTPROTO_L2CAP); |
| 4427 | goto error; |
| 4428 | } |
| 4429 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4430 | if (bt_debugfs) { |
| 4431 | l2cap_debugfs = debugfs_create_file("l2cap", 0444, |
| 4432 | bt_debugfs, NULL, &l2cap_debugfs_fops); |
| 4433 | if (!l2cap_debugfs) |
| 4434 | BT_ERR("Failed to create L2CAP debug file"); |
| 4435 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4436 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4437 | return 0; |
| 4438 | |
| 4439 | error: |
Anderson Lizardo | b78d7b4f | 2010-11-29 12:15:50 -0400 | [diff] [blame] | 4440 | destroy_workqueue(_busy_wq); |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 4441 | l2cap_cleanup_sockets(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4442 | return err; |
| 4443 | } |
| 4444 | |
Gustavo F. Padovan | 6427451 | 2011-02-07 20:08:52 -0200 | [diff] [blame] | 4445 | void l2cap_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4446 | { |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4447 | debugfs_remove(l2cap_debugfs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4448 | |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4449 | flush_workqueue(_busy_wq); |
| 4450 | destroy_workqueue(_busy_wq); |
| 4451 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4452 | if (hci_unregister_proto(&l2cap_hci_proto) < 0) |
| 4453 | BT_ERR("L2CAP protocol unregistration failed"); |
| 4454 | |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 4455 | l2cap_cleanup_sockets(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4456 | } |
| 4457 | |
Gustavo F. Padovan | d1c4a17 | 2010-07-18 16:25:54 -0300 | [diff] [blame] | 4458 | module_param(disable_ertm, bool, 0644); |
| 4459 | MODULE_PARM_DESC(disable_ertm, "Disable enhanced retransmission mode"); |