YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | BlueZ - Bluetooth protocol stack for Linux |
| 3 | Copyright (C) 2000-2001 Qualcomm Incorporated |
Gustavo F. Padovan | ce5706b | 2010-07-13 11:57:11 -0300 | [diff] [blame] | 4 | Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org> |
Gustavo F. Padovan | 5d8868f | 2010-07-16 16:18:39 -0300 | [diff] [blame] | 5 | Copyright (C) 2010 Google Inc. |
Gustavo F. Padovan | 590051d | 2011-12-18 13:39:33 -0200 | [diff] [blame] | 6 | Copyright (C) 2011 ProFUSION Embedded Systems |
Mat Martineau | 422e925 | 2012-04-27 16:50:55 -0700 | [diff] [blame] | 7 | Copyright (c) 2012 Code Aurora Forum. All rights reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | |
| 9 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> |
| 10 | |
| 11 | This program is free software; you can redistribute it and/or modify |
| 12 | it under the terms of the GNU General Public License version 2 as |
| 13 | published by the Free Software Foundation; |
| 14 | |
| 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| 16 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. |
| 18 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 19 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
| 20 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 21 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 23 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 24 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
| 25 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | SOFTWARE IS DISCLAIMED. |
| 27 | */ |
| 28 | |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 29 | /* Bluetooth L2CAP core. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <linux/module.h> |
| 32 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 33 | #include <linux/debugfs.h> |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 34 | #include <linux/crc16.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
| 36 | #include <net/bluetooth/bluetooth.h> |
| 37 | #include <net/bluetooth/hci_core.h> |
| 38 | #include <net/bluetooth/l2cap.h> |
Anderson Briglia | b501d6a | 2011-06-07 18:46:31 -0300 | [diff] [blame] | 39 | #include <net/bluetooth/smp.h> |
Andrei Emeltchenko | 97e8e89 | 2012-05-29 13:59:17 +0300 | [diff] [blame] | 40 | #include <net/bluetooth/a2mp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
Mat Martineau | d1de6d4 | 2012-05-17 20:53:55 -0700 | [diff] [blame] | 42 | bool disable_ertm; |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 43 | |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 44 | static u32 l2cap_feat_mask = L2CAP_FEAT_FIXED_CHAN; |
Mat Martineau | 50a147c | 2011-11-02 16:18:34 -0700 | [diff] [blame] | 45 | static u8 l2cap_fixed_chan[8] = { L2CAP_FC_L2CAP, }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | |
Johannes Berg | b5ad8b7 | 2011-06-01 08:54:45 +0200 | [diff] [blame] | 47 | static LIST_HEAD(chan_list); |
| 48 | static DEFINE_RWLOCK(chan_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, |
| 51 | u8 code, u8 ident, u16 dlen, void *data); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 52 | static void l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, |
| 53 | void *data); |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 54 | 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] | 55 | static void l2cap_send_disconn_req(struct l2cap_conn *conn, |
Gustavo Padovan | c5daa68 | 2012-05-16 12:17:10 -0300 | [diff] [blame] | 56 | struct l2cap_chan *chan, int err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | |
Gustavo Padovan | d660366 | 2012-05-21 13:58:22 -0300 | [diff] [blame] | 58 | static void l2cap_tx(struct l2cap_chan *chan, struct l2cap_ctrl *control, |
Mat Martineau | 608bcc6 | 2012-05-17 20:53:32 -0700 | [diff] [blame] | 59 | struct sk_buff_head *skbs, u8 event); |
| 60 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 61 | /* ---- L2CAP channels ---- */ |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 62 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 63 | 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] | 64 | { |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 65 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 66 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 67 | list_for_each_entry(c, &conn->chan_l, list) { |
| 68 | if (c->dcid == cid) |
| 69 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 70 | } |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 71 | return NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 72 | } |
| 73 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 74 | 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] | 75 | { |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 76 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 77 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 78 | list_for_each_entry(c, &conn->chan_l, list) { |
| 79 | if (c->scid == cid) |
| 80 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 81 | } |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 82 | return NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 83 | } |
| 84 | |
| 85 | /* Find channel with given SCID. |
Mat Martineau | ef191ad | 2012-05-02 09:42:00 -0700 | [diff] [blame] | 86 | * Returns locked channel. */ |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 87 | 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] | 88 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 89 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 90 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 91 | mutex_lock(&conn->chan_lock); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 92 | c = __l2cap_get_chan_by_scid(conn, cid); |
Mat Martineau | ef191ad | 2012-05-02 09:42:00 -0700 | [diff] [blame] | 93 | if (c) |
| 94 | l2cap_chan_lock(c); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 95 | mutex_unlock(&conn->chan_lock); |
| 96 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 97 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 98 | } |
| 99 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 100 | 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] | 101 | { |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 102 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 103 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 104 | list_for_each_entry(c, &conn->chan_l, list) { |
| 105 | if (c->ident == ident) |
| 106 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 107 | } |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 108 | return NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 109 | } |
| 110 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 111 | 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] | 112 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 113 | struct l2cap_chan *c; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 114 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 115 | list_for_each_entry(c, &chan_list, global_l) { |
| 116 | if (c->sport == psm && !bacmp(&bt_sk(c->sk)->src, src)) |
Szymon Janc | 250938c | 2011-11-16 09:32:22 +0100 | [diff] [blame] | 117 | return c; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 118 | } |
Szymon Janc | 250938c | 2011-11-16 09:32:22 +0100 | [diff] [blame] | 119 | return NULL; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 120 | } |
| 121 | |
| 122 | int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm) |
| 123 | { |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 124 | int err; |
| 125 | |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 126 | write_lock(&chan_list_lock); |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 127 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 128 | if (psm && __l2cap_global_chan_by_addr(psm, src)) { |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 129 | err = -EADDRINUSE; |
| 130 | goto done; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 131 | } |
| 132 | |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 133 | if (psm) { |
| 134 | chan->psm = psm; |
| 135 | chan->sport = psm; |
| 136 | err = 0; |
| 137 | } else { |
| 138 | u16 p; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 139 | |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 140 | err = -EINVAL; |
| 141 | for (p = 0x1001; p < 0x1100; p += 2) |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 142 | if (!__l2cap_global_chan_by_addr(cpu_to_le16(p), src)) { |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 143 | chan->psm = cpu_to_le16(p); |
| 144 | chan->sport = cpu_to_le16(p); |
| 145 | err = 0; |
| 146 | break; |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | done: |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 151 | write_unlock(&chan_list_lock); |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 152 | return err; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 153 | } |
| 154 | |
| 155 | int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid) |
| 156 | { |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 157 | write_lock(&chan_list_lock); |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 158 | |
| 159 | chan->scid = scid; |
| 160 | |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 161 | write_unlock(&chan_list_lock); |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 162 | |
| 163 | return 0; |
| 164 | } |
| 165 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 166 | static u16 l2cap_alloc_cid(struct l2cap_conn *conn) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 167 | { |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 168 | u16 cid = L2CAP_CID_DYN_START; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 169 | |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 170 | for (; cid < L2CAP_CID_DYN_END; cid++) { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 171 | if (!__l2cap_get_chan_by_scid(conn, cid)) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 172 | return cid; |
| 173 | } |
| 174 | |
| 175 | return 0; |
| 176 | } |
| 177 | |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 178 | static void __l2cap_state_change(struct l2cap_chan *chan, int state) |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 179 | { |
Andrei Emeltchenko | 42d2d87 | 2012-02-17 11:40:57 +0200 | [diff] [blame] | 180 | BT_DBG("chan %p %s -> %s", chan, state_to_string(chan->state), |
Gustavo F. Padovan | badaaa0 | 2011-11-23 20:11:46 -0200 | [diff] [blame] | 181 | state_to_string(state)); |
| 182 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 183 | chan->state = state; |
Gustavo Padovan | 80b9802 | 2012-05-27 22:27:51 -0300 | [diff] [blame] | 184 | chan->ops->state_change(chan, state); |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 185 | } |
| 186 | |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 187 | static void l2cap_state_change(struct l2cap_chan *chan, int state) |
| 188 | { |
| 189 | struct sock *sk = chan->sk; |
| 190 | |
| 191 | lock_sock(sk); |
| 192 | __l2cap_state_change(chan, state); |
| 193 | release_sock(sk); |
| 194 | } |
| 195 | |
Andrei Emeltchenko | 2e0052e | 2012-02-21 12:54:58 +0200 | [diff] [blame] | 196 | static inline void __l2cap_chan_set_err(struct l2cap_chan *chan, int err) |
| 197 | { |
| 198 | struct sock *sk = chan->sk; |
| 199 | |
| 200 | sk->sk_err = err; |
| 201 | } |
| 202 | |
| 203 | static inline void l2cap_chan_set_err(struct l2cap_chan *chan, int err) |
| 204 | { |
| 205 | struct sock *sk = chan->sk; |
| 206 | |
| 207 | lock_sock(sk); |
| 208 | __l2cap_chan_set_err(chan, err); |
| 209 | release_sock(sk); |
| 210 | } |
| 211 | |
Mat Martineau | 4239d16 | 2012-05-17 20:53:49 -0700 | [diff] [blame] | 212 | static void __set_retrans_timer(struct l2cap_chan *chan) |
| 213 | { |
| 214 | if (!delayed_work_pending(&chan->monitor_timer) && |
| 215 | chan->retrans_timeout) { |
| 216 | l2cap_set_timer(chan, &chan->retrans_timer, |
| 217 | msecs_to_jiffies(chan->retrans_timeout)); |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | static void __set_monitor_timer(struct l2cap_chan *chan) |
| 222 | { |
| 223 | __clear_retrans_timer(chan); |
| 224 | if (chan->monitor_timeout) { |
| 225 | l2cap_set_timer(chan, &chan->monitor_timer, |
| 226 | msecs_to_jiffies(chan->monitor_timeout)); |
| 227 | } |
| 228 | } |
| 229 | |
Mat Martineau | 608bcc6 | 2012-05-17 20:53:32 -0700 | [diff] [blame] | 230 | static struct sk_buff *l2cap_ertm_seq_in_queue(struct sk_buff_head *head, |
| 231 | u16 seq) |
| 232 | { |
| 233 | struct sk_buff *skb; |
| 234 | |
| 235 | skb_queue_walk(head, skb) { |
| 236 | if (bt_cb(skb)->control.txseq == seq) |
| 237 | return skb; |
| 238 | } |
| 239 | |
| 240 | return NULL; |
| 241 | } |
| 242 | |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 243 | /* ---- L2CAP sequence number lists ---- */ |
| 244 | |
| 245 | /* For ERTM, ordered lists of sequence numbers must be tracked for |
| 246 | * SREJ requests that are received and for frames that are to be |
| 247 | * retransmitted. These seq_list functions implement a singly-linked |
| 248 | * list in an array, where membership in the list can also be checked |
| 249 | * in constant time. Items can also be added to the tail of the list |
| 250 | * and removed from the head in constant time, without further memory |
| 251 | * allocs or frees. |
| 252 | */ |
| 253 | |
| 254 | static int l2cap_seq_list_init(struct l2cap_seq_list *seq_list, u16 size) |
| 255 | { |
| 256 | size_t alloc_size, i; |
| 257 | |
| 258 | /* Allocated size is a power of 2 to map sequence numbers |
| 259 | * (which may be up to 14 bits) in to a smaller array that is |
| 260 | * sized for the negotiated ERTM transmit windows. |
| 261 | */ |
| 262 | alloc_size = roundup_pow_of_two(size); |
| 263 | |
| 264 | seq_list->list = kmalloc(sizeof(u16) * alloc_size, GFP_KERNEL); |
| 265 | if (!seq_list->list) |
| 266 | return -ENOMEM; |
| 267 | |
| 268 | seq_list->mask = alloc_size - 1; |
| 269 | seq_list->head = L2CAP_SEQ_LIST_CLEAR; |
| 270 | seq_list->tail = L2CAP_SEQ_LIST_CLEAR; |
| 271 | for (i = 0; i < alloc_size; i++) |
| 272 | seq_list->list[i] = L2CAP_SEQ_LIST_CLEAR; |
| 273 | |
| 274 | return 0; |
| 275 | } |
| 276 | |
| 277 | static inline void l2cap_seq_list_free(struct l2cap_seq_list *seq_list) |
| 278 | { |
| 279 | kfree(seq_list->list); |
| 280 | } |
| 281 | |
| 282 | static inline bool l2cap_seq_list_contains(struct l2cap_seq_list *seq_list, |
| 283 | u16 seq) |
| 284 | { |
| 285 | /* Constant-time check for list membership */ |
| 286 | return seq_list->list[seq & seq_list->mask] != L2CAP_SEQ_LIST_CLEAR; |
| 287 | } |
| 288 | |
| 289 | static u16 l2cap_seq_list_remove(struct l2cap_seq_list *seq_list, u16 seq) |
| 290 | { |
| 291 | u16 mask = seq_list->mask; |
| 292 | |
| 293 | if (seq_list->head == L2CAP_SEQ_LIST_CLEAR) { |
| 294 | /* In case someone tries to pop the head of an empty list */ |
| 295 | return L2CAP_SEQ_LIST_CLEAR; |
| 296 | } else if (seq_list->head == seq) { |
| 297 | /* Head can be removed in constant time */ |
| 298 | seq_list->head = seq_list->list[seq & mask]; |
| 299 | seq_list->list[seq & mask] = L2CAP_SEQ_LIST_CLEAR; |
| 300 | |
| 301 | if (seq_list->head == L2CAP_SEQ_LIST_TAIL) { |
| 302 | seq_list->head = L2CAP_SEQ_LIST_CLEAR; |
| 303 | seq_list->tail = L2CAP_SEQ_LIST_CLEAR; |
| 304 | } |
| 305 | } else { |
| 306 | /* Walk the list to find the sequence number */ |
| 307 | u16 prev = seq_list->head; |
| 308 | while (seq_list->list[prev & mask] != seq) { |
| 309 | prev = seq_list->list[prev & mask]; |
| 310 | if (prev == L2CAP_SEQ_LIST_TAIL) |
| 311 | return L2CAP_SEQ_LIST_CLEAR; |
| 312 | } |
| 313 | |
| 314 | /* Unlink the number from the list and clear it */ |
| 315 | seq_list->list[prev & mask] = seq_list->list[seq & mask]; |
| 316 | seq_list->list[seq & mask] = L2CAP_SEQ_LIST_CLEAR; |
| 317 | if (seq_list->tail == seq) |
| 318 | seq_list->tail = prev; |
| 319 | } |
| 320 | return seq; |
| 321 | } |
| 322 | |
| 323 | static inline u16 l2cap_seq_list_pop(struct l2cap_seq_list *seq_list) |
| 324 | { |
| 325 | /* Remove the head in constant time */ |
| 326 | return l2cap_seq_list_remove(seq_list, seq_list->head); |
| 327 | } |
| 328 | |
| 329 | static void l2cap_seq_list_clear(struct l2cap_seq_list *seq_list) |
| 330 | { |
Gustavo Padovan | f522ae3 | 2012-05-09 18:28:00 -0300 | [diff] [blame] | 331 | u16 i; |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 332 | |
Gustavo Padovan | f522ae3 | 2012-05-09 18:28:00 -0300 | [diff] [blame] | 333 | if (seq_list->head == L2CAP_SEQ_LIST_CLEAR) |
| 334 | return; |
| 335 | |
| 336 | for (i = 0; i <= seq_list->mask; i++) |
| 337 | seq_list->list[i] = L2CAP_SEQ_LIST_CLEAR; |
| 338 | |
| 339 | seq_list->head = L2CAP_SEQ_LIST_CLEAR; |
| 340 | seq_list->tail = L2CAP_SEQ_LIST_CLEAR; |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 341 | } |
| 342 | |
| 343 | static void l2cap_seq_list_append(struct l2cap_seq_list *seq_list, u16 seq) |
| 344 | { |
| 345 | u16 mask = seq_list->mask; |
| 346 | |
| 347 | /* All appends happen in constant time */ |
| 348 | |
Gustavo Padovan | f522ae3 | 2012-05-09 18:28:00 -0300 | [diff] [blame] | 349 | if (seq_list->list[seq & mask] != L2CAP_SEQ_LIST_CLEAR) |
| 350 | return; |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 351 | |
Gustavo Padovan | f522ae3 | 2012-05-09 18:28:00 -0300 | [diff] [blame] | 352 | if (seq_list->tail == L2CAP_SEQ_LIST_CLEAR) |
| 353 | seq_list->head = seq; |
| 354 | else |
| 355 | seq_list->list[seq_list->tail & mask] = seq; |
| 356 | |
| 357 | seq_list->tail = seq; |
| 358 | seq_list->list[seq & mask] = L2CAP_SEQ_LIST_TAIL; |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 359 | } |
| 360 | |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 361 | static void l2cap_chan_timeout(struct work_struct *work) |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 362 | { |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 363 | struct l2cap_chan *chan = container_of(work, struct l2cap_chan, |
| 364 | chan_timer.work); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 365 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 366 | int reason; |
| 367 | |
Andrei Emeltchenko | e05dcc3 | 2012-02-17 11:40:56 +0200 | [diff] [blame] | 368 | BT_DBG("chan %p state %s", chan, state_to_string(chan->state)); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 369 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 370 | mutex_lock(&conn->chan_lock); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 371 | l2cap_chan_lock(chan); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 372 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 373 | if (chan->state == BT_CONNECTED || chan->state == BT_CONFIG) |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 374 | reason = ECONNREFUSED; |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 375 | else if (chan->state == BT_CONNECT && |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 376 | chan->sec_level != BT_SECURITY_SDP) |
| 377 | reason = ECONNREFUSED; |
| 378 | else |
| 379 | reason = ETIMEDOUT; |
| 380 | |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 381 | l2cap_chan_close(chan, reason); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 382 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 383 | l2cap_chan_unlock(chan); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 384 | |
Gustavo Padovan | 80b9802 | 2012-05-27 22:27:51 -0300 | [diff] [blame] | 385 | chan->ops->close(chan); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 386 | mutex_unlock(&conn->chan_lock); |
| 387 | |
Ulisses Furquim | 371fd83 | 2011-12-21 20:02:36 -0200 | [diff] [blame] | 388 | l2cap_chan_put(chan); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 389 | } |
| 390 | |
Gustavo Padovan | eef1d9b | 2012-03-25 13:59:16 -0300 | [diff] [blame] | 391 | struct l2cap_chan *l2cap_chan_create(void) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 392 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 393 | struct l2cap_chan *chan; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 394 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 395 | chan = kzalloc(sizeof(*chan), GFP_ATOMIC); |
| 396 | if (!chan) |
| 397 | return NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 398 | |
Andrei Emeltchenko | c03b355 | 2012-02-21 12:54:56 +0200 | [diff] [blame] | 399 | mutex_init(&chan->lock); |
| 400 | |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 401 | write_lock(&chan_list_lock); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 402 | list_add(&chan->global_l, &chan_list); |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 403 | write_unlock(&chan_list_lock); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 404 | |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 405 | INIT_DELAYED_WORK(&chan->chan_timer, l2cap_chan_timeout); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 406 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 407 | chan->state = BT_OPEN; |
| 408 | |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 409 | atomic_set(&chan->refcnt, 1); |
| 410 | |
Mat Martineau | 2827011 | 2012-05-17 21:14:09 -0700 | [diff] [blame] | 411 | /* This flag is cleared in l2cap_chan_ready() */ |
| 412 | set_bit(CONF_NOT_COMPLETE, &chan->conf_state); |
| 413 | |
Gustavo Padovan | eef1d9b | 2012-03-25 13:59:16 -0300 | [diff] [blame] | 414 | BT_DBG("chan %p", chan); |
Szymon Janc | abc545b | 2011-11-03 16:05:44 +0100 | [diff] [blame] | 415 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 416 | return chan; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 417 | } |
| 418 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 419 | void l2cap_chan_destroy(struct l2cap_chan *chan) |
Gustavo F. Padovan | 6ff5abb | 2011-04-25 15:10:41 -0300 | [diff] [blame] | 420 | { |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 421 | write_lock(&chan_list_lock); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 422 | list_del(&chan->global_l); |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 423 | write_unlock(&chan_list_lock); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 424 | |
Ulisses Furquim | 371fd83 | 2011-12-21 20:02:36 -0200 | [diff] [blame] | 425 | l2cap_chan_put(chan); |
Gustavo F. Padovan | 6ff5abb | 2011-04-25 15:10:41 -0300 | [diff] [blame] | 426 | } |
| 427 | |
Andrei Emeltchenko | bd4b165 | 2012-03-28 16:31:25 +0300 | [diff] [blame] | 428 | void l2cap_chan_set_defaults(struct l2cap_chan *chan) |
| 429 | { |
| 430 | chan->fcs = L2CAP_FCS_CRC16; |
| 431 | chan->max_tx = L2CAP_DEFAULT_MAX_TX; |
| 432 | chan->tx_win = L2CAP_DEFAULT_TX_WINDOW; |
| 433 | chan->tx_win_max = L2CAP_DEFAULT_TX_WINDOW; |
| 434 | chan->sec_level = BT_SECURITY_LOW; |
| 435 | |
| 436 | set_bit(FLAG_FORCE_ACTIVE, &chan->flags); |
| 437 | } |
| 438 | |
Andrei Emeltchenko | 14a2849 | 2012-03-23 16:31:49 +0200 | [diff] [blame] | 439 | 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] | 440 | { |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 441 | BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, |
Andrei Emeltchenko | 097db76 | 2012-03-09 14:16:17 +0200 | [diff] [blame] | 442 | __le16_to_cpu(chan->psm), chan->dcid); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 443 | |
Andrei Emeltchenko | 9f5a0d7 | 2011-11-07 14:20:25 +0200 | [diff] [blame] | 444 | conn->disc_reason = HCI_ERROR_REMOTE_USER_TERM; |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 445 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 446 | chan->conn = conn; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 447 | |
Andrei Emeltchenko | 5491120 | 2012-02-06 15:04:00 +0200 | [diff] [blame] | 448 | switch (chan->chan_type) { |
| 449 | case L2CAP_CHAN_CONN_ORIENTED: |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 450 | if (conn->hcon->type == LE_LINK) { |
| 451 | /* LE connection */ |
Andre Guedes | 6fcb06a | 2012-05-31 17:01:33 -0300 | [diff] [blame] | 452 | chan->omtu = L2CAP_DEFAULT_MTU; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 453 | chan->scid = L2CAP_CID_LE_DATA; |
| 454 | chan->dcid = L2CAP_CID_LE_DATA; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 455 | } else { |
| 456 | /* Alloc CID for connection-oriented socket */ |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 457 | chan->scid = l2cap_alloc_cid(conn); |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 458 | chan->omtu = L2CAP_DEFAULT_MTU; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 459 | } |
Andrei Emeltchenko | 5491120 | 2012-02-06 15:04:00 +0200 | [diff] [blame] | 460 | break; |
| 461 | |
| 462 | case L2CAP_CHAN_CONN_LESS: |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 463 | /* Connectionless socket */ |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 464 | chan->scid = L2CAP_CID_CONN_LESS; |
| 465 | chan->dcid = L2CAP_CID_CONN_LESS; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 466 | chan->omtu = L2CAP_DEFAULT_MTU; |
Andrei Emeltchenko | 5491120 | 2012-02-06 15:04:00 +0200 | [diff] [blame] | 467 | break; |
| 468 | |
Andrei Emeltchenko | 416fa75 | 2012-05-29 13:59:16 +0300 | [diff] [blame] | 469 | case L2CAP_CHAN_CONN_FIX_A2MP: |
| 470 | chan->scid = L2CAP_CID_A2MP; |
| 471 | chan->dcid = L2CAP_CID_A2MP; |
| 472 | chan->omtu = L2CAP_A2MP_DEFAULT_MTU; |
| 473 | chan->imtu = L2CAP_A2MP_DEFAULT_MTU; |
| 474 | break; |
| 475 | |
Andrei Emeltchenko | 5491120 | 2012-02-06 15:04:00 +0200 | [diff] [blame] | 476 | default: |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 477 | /* Raw socket can send/recv signalling messages only */ |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 478 | chan->scid = L2CAP_CID_SIGNALING; |
| 479 | chan->dcid = L2CAP_CID_SIGNALING; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 480 | chan->omtu = L2CAP_DEFAULT_MTU; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 481 | } |
| 482 | |
Andrei Emeltchenko | 8f7975b | 2011-10-13 16:18:54 +0300 | [diff] [blame] | 483 | chan->local_id = L2CAP_BESTEFFORT_ID; |
| 484 | chan->local_stype = L2CAP_SERV_BESTEFFORT; |
| 485 | chan->local_msdu = L2CAP_DEFAULT_MAX_SDU_SIZE; |
| 486 | chan->local_sdu_itime = L2CAP_DEFAULT_SDU_ITIME; |
| 487 | chan->local_acc_lat = L2CAP_DEFAULT_ACC_LAT; |
| 488 | chan->local_flush_to = L2CAP_DEFAULT_FLUSH_TO; |
| 489 | |
Ulisses Furquim | 371fd83 | 2011-12-21 20:02:36 -0200 | [diff] [blame] | 490 | l2cap_chan_hold(chan); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 491 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 492 | list_add(&chan->list, &conn->chan_l); |
Andrei Emeltchenko | 643162a | 2012-02-22 17:11:55 +0200 | [diff] [blame] | 493 | } |
| 494 | |
Andrei Emeltchenko | 466f800 | 2012-05-29 13:59:01 +0300 | [diff] [blame] | 495 | void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan) |
Andrei Emeltchenko | 643162a | 2012-02-22 17:11:55 +0200 | [diff] [blame] | 496 | { |
| 497 | mutex_lock(&conn->chan_lock); |
| 498 | __l2cap_chan_add(conn, chan); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 499 | mutex_unlock(&conn->chan_lock); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 500 | } |
| 501 | |
Andrei Emeltchenko | 466f800 | 2012-05-29 13:59:01 +0300 | [diff] [blame] | 502 | void l2cap_chan_del(struct l2cap_chan *chan, int err) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 503 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 504 | struct l2cap_conn *conn = chan->conn; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 505 | |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 506 | __clear_chan_timer(chan); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 507 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 508 | BT_DBG("chan %p, conn %p, err %d", chan, conn, err); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 509 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 510 | if (conn) { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 511 | /* Delete from channel list */ |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 512 | list_del(&chan->list); |
Gustavo F. Padovan | 3d57dc6 | 2011-12-17 10:56:45 -0200 | [diff] [blame] | 513 | |
Ulisses Furquim | 371fd83 | 2011-12-21 20:02:36 -0200 | [diff] [blame] | 514 | l2cap_chan_put(chan); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 515 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 516 | chan->conn = NULL; |
Andrei Emeltchenko | 3cabbfd | 2012-05-31 11:01:37 +0300 | [diff] [blame] | 517 | |
| 518 | if (chan->chan_type != L2CAP_CHAN_CONN_FIX_A2MP) |
| 519 | hci_conn_put(conn->hcon); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 520 | } |
| 521 | |
Andrei Emeltchenko | c0df7f6 | 2012-05-27 22:27:52 -0300 | [diff] [blame] | 522 | if (chan->ops->teardown) |
| 523 | chan->ops->teardown(chan, err); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 524 | |
Mat Martineau | 2827011 | 2012-05-17 21:14:09 -0700 | [diff] [blame] | 525 | if (test_bit(CONF_NOT_COMPLETE, &chan->conf_state)) |
Gustavo F. Padovan | 6ff5abb | 2011-04-25 15:10:41 -0300 | [diff] [blame] | 526 | return; |
Gustavo F. Padovan | 2ead70b | 2011-04-01 15:13:36 -0300 | [diff] [blame] | 527 | |
Gustavo Padovan | ee556f6 | 2012-05-18 20:22:38 -0300 | [diff] [blame] | 528 | switch(chan->mode) { |
| 529 | case L2CAP_MODE_BASIC: |
| 530 | break; |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 531 | |
Gustavo Padovan | ee556f6 | 2012-05-18 20:22:38 -0300 | [diff] [blame] | 532 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 533 | __clear_retrans_timer(chan); |
| 534 | __clear_monitor_timer(chan); |
| 535 | __clear_ack_timer(chan); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 536 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 537 | skb_queue_purge(&chan->srej_q); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 538 | |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 539 | l2cap_seq_list_free(&chan->srej_list); |
| 540 | l2cap_seq_list_free(&chan->retrans_list); |
Gustavo Padovan | ee556f6 | 2012-05-18 20:22:38 -0300 | [diff] [blame] | 541 | |
| 542 | /* fall through */ |
| 543 | |
| 544 | case L2CAP_MODE_STREAMING: |
| 545 | skb_queue_purge(&chan->tx_q); |
| 546 | break; |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 547 | } |
Gustavo Padovan | ee556f6 | 2012-05-18 20:22:38 -0300 | [diff] [blame] | 548 | |
| 549 | return; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 550 | } |
| 551 | |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 552 | void l2cap_chan_close(struct l2cap_chan *chan, int reason) |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 553 | { |
| 554 | struct l2cap_conn *conn = chan->conn; |
| 555 | struct sock *sk = chan->sk; |
| 556 | |
Andrei Emeltchenko | e05dcc3 | 2012-02-17 11:40:56 +0200 | [diff] [blame] | 557 | BT_DBG("chan %p state %s sk %p", chan, |
| 558 | state_to_string(chan->state), sk); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 559 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 560 | switch (chan->state) { |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 561 | case BT_LISTEN: |
Andrei Emeltchenko | c0df7f6 | 2012-05-27 22:27:52 -0300 | [diff] [blame] | 562 | if (chan->ops->teardown) |
| 563 | chan->ops->teardown(chan, 0); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 564 | break; |
| 565 | |
| 566 | case BT_CONNECTED: |
| 567 | case BT_CONFIG: |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 568 | if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 569 | conn->hcon->type == ACL_LINK) { |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 570 | __set_chan_timer(chan, sk->sk_sndtimeo); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 571 | l2cap_send_disconn_req(conn, chan, reason); |
| 572 | } else |
| 573 | l2cap_chan_del(chan, reason); |
| 574 | break; |
| 575 | |
| 576 | case BT_CONNECT2: |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 577 | if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 578 | conn->hcon->type == ACL_LINK) { |
| 579 | struct l2cap_conn_rsp rsp; |
| 580 | __u16 result; |
| 581 | |
Gustavo Padovan | c5daa68 | 2012-05-16 12:17:10 -0300 | [diff] [blame] | 582 | if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 583 | result = L2CAP_CR_SEC_BLOCK; |
| 584 | else |
| 585 | result = L2CAP_CR_BAD_PSM; |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 586 | l2cap_state_change(chan, BT_DISCONN); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 587 | |
| 588 | rsp.scid = cpu_to_le16(chan->dcid); |
| 589 | rsp.dcid = cpu_to_le16(chan->scid); |
| 590 | rsp.result = cpu_to_le16(result); |
Andrei Emeltchenko | ac73498 | 2012-05-24 15:42:51 +0300 | [diff] [blame] | 591 | rsp.status = __constant_cpu_to_le16(L2CAP_CS_NO_INFO); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 592 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, |
| 593 | sizeof(rsp), &rsp); |
| 594 | } |
| 595 | |
| 596 | l2cap_chan_del(chan, reason); |
| 597 | break; |
| 598 | |
| 599 | case BT_CONNECT: |
| 600 | case BT_DISCONN: |
| 601 | l2cap_chan_del(chan, reason); |
| 602 | break; |
| 603 | |
| 604 | default: |
Andrei Emeltchenko | c0df7f6 | 2012-05-27 22:27:52 -0300 | [diff] [blame] | 605 | if (chan->ops->teardown) |
| 606 | chan->ops->teardown(chan, 0); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 607 | break; |
| 608 | } |
| 609 | } |
| 610 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 611 | static inline u8 l2cap_get_auth_type(struct l2cap_chan *chan) |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 612 | { |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 613 | if (chan->chan_type == L2CAP_CHAN_RAW) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 614 | switch (chan->sec_level) { |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 615 | case BT_SECURITY_HIGH: |
| 616 | return HCI_AT_DEDICATED_BONDING_MITM; |
| 617 | case BT_SECURITY_MEDIUM: |
| 618 | return HCI_AT_DEDICATED_BONDING; |
| 619 | default: |
| 620 | return HCI_AT_NO_BONDING; |
| 621 | } |
Andrei Emeltchenko | 2983fd6 | 2012-05-24 15:42:50 +0300 | [diff] [blame] | 622 | } else if (chan->psm == __constant_cpu_to_le16(L2CAP_PSM_SDP)) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 623 | if (chan->sec_level == BT_SECURITY_LOW) |
| 624 | chan->sec_level = BT_SECURITY_SDP; |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 625 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 626 | if (chan->sec_level == BT_SECURITY_HIGH) |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 627 | return HCI_AT_NO_BONDING_MITM; |
| 628 | else |
| 629 | return HCI_AT_NO_BONDING; |
| 630 | } else { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 631 | switch (chan->sec_level) { |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 632 | case BT_SECURITY_HIGH: |
| 633 | return HCI_AT_GENERAL_BONDING_MITM; |
| 634 | case BT_SECURITY_MEDIUM: |
| 635 | return HCI_AT_GENERAL_BONDING; |
| 636 | default: |
| 637 | return HCI_AT_NO_BONDING; |
| 638 | } |
| 639 | } |
| 640 | } |
| 641 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 642 | /* Service level security */ |
Gustavo F. Padovan | d45fc42 | 2011-11-05 19:54:24 -0200 | [diff] [blame] | 643 | int l2cap_chan_check_security(struct l2cap_chan *chan) |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 644 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 645 | struct l2cap_conn *conn = chan->conn; |
Marcel Holtmann | 0684e5f | 2009-02-09 02:48:38 +0100 | [diff] [blame] | 646 | __u8 auth_type; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 647 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 648 | auth_type = l2cap_get_auth_type(chan); |
Marcel Holtmann | 0684e5f | 2009-02-09 02:48:38 +0100 | [diff] [blame] | 649 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 650 | return hci_conn_security(conn->hcon, chan->sec_level, auth_type); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 651 | } |
| 652 | |
Johannes Berg | b5ad8b7 | 2011-06-01 08:54:45 +0200 | [diff] [blame] | 653 | static u8 l2cap_get_ident(struct l2cap_conn *conn) |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 654 | { |
| 655 | u8 id; |
| 656 | |
| 657 | /* Get next available identificator. |
| 658 | * 1 - 128 are used by kernel. |
| 659 | * 129 - 199 are reserved. |
| 660 | * 200 - 254 are used by utilities like l2ping, etc. |
| 661 | */ |
| 662 | |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 663 | spin_lock(&conn->lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 664 | |
| 665 | if (++conn->tx_ident > 128) |
| 666 | conn->tx_ident = 1; |
| 667 | |
| 668 | id = conn->tx_ident; |
| 669 | |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 670 | spin_unlock(&conn->lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 671 | |
| 672 | return id; |
| 673 | } |
| 674 | |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 675 | 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] | 676 | { |
| 677 | struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 678 | u8 flags; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 679 | |
| 680 | BT_DBG("code 0x%2.2x", code); |
| 681 | |
| 682 | if (!skb) |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 683 | return; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 684 | |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 685 | if (lmp_no_flush_capable(conn->hcon->hdev)) |
| 686 | flags = ACL_START_NO_FLUSH; |
| 687 | else |
| 688 | flags = ACL_START; |
| 689 | |
Jaikumar Ganesh | 14b12d0 | 2011-05-23 18:06:04 -0700 | [diff] [blame] | 690 | bt_cb(skb)->force_active = BT_POWER_FORCE_ACTIVE_ON; |
Luiz Augusto von Dentz | 5e59b79 | 2011-11-01 10:58:57 +0200 | [diff] [blame] | 691 | skb->priority = HCI_PRIO_MAX; |
Jaikumar Ganesh | 14b12d0 | 2011-05-23 18:06:04 -0700 | [diff] [blame] | 692 | |
Luiz Augusto von Dentz | 73d80de | 2011-11-02 15:52:01 +0200 | [diff] [blame] | 693 | hci_send_acl(conn->hchan, skb, flags); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 694 | } |
| 695 | |
Luiz Augusto von Dentz | 73d80de | 2011-11-02 15:52:01 +0200 | [diff] [blame] | 696 | static void l2cap_do_send(struct l2cap_chan *chan, struct sk_buff *skb) |
| 697 | { |
| 698 | struct hci_conn *hcon = chan->conn->hcon; |
| 699 | u16 flags; |
| 700 | |
| 701 | BT_DBG("chan %p, skb %p len %d priority %u", chan, skb, skb->len, |
| 702 | skb->priority); |
| 703 | |
| 704 | if (!test_bit(FLAG_FLUSHABLE, &chan->flags) && |
| 705 | lmp_no_flush_capable(hcon->hdev)) |
| 706 | flags = ACL_START_NO_FLUSH; |
| 707 | else |
| 708 | flags = ACL_START; |
| 709 | |
| 710 | bt_cb(skb)->force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags); |
| 711 | hci_send_acl(chan->conn->hchan, skb, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | } |
| 713 | |
Mat Martineau | b5c6aae | 2012-04-25 16:36:15 -0700 | [diff] [blame] | 714 | static void __unpack_enhanced_control(u16 enh, struct l2cap_ctrl *control) |
| 715 | { |
| 716 | control->reqseq = (enh & L2CAP_CTRL_REQSEQ) >> L2CAP_CTRL_REQSEQ_SHIFT; |
| 717 | control->final = (enh & L2CAP_CTRL_FINAL) >> L2CAP_CTRL_FINAL_SHIFT; |
| 718 | |
| 719 | if (enh & L2CAP_CTRL_FRAME_TYPE) { |
| 720 | /* S-Frame */ |
| 721 | control->sframe = 1; |
| 722 | control->poll = (enh & L2CAP_CTRL_POLL) >> L2CAP_CTRL_POLL_SHIFT; |
| 723 | control->super = (enh & L2CAP_CTRL_SUPERVISE) >> L2CAP_CTRL_SUPER_SHIFT; |
| 724 | |
| 725 | control->sar = 0; |
| 726 | control->txseq = 0; |
| 727 | } else { |
| 728 | /* I-Frame */ |
| 729 | control->sframe = 0; |
| 730 | control->sar = (enh & L2CAP_CTRL_SAR) >> L2CAP_CTRL_SAR_SHIFT; |
| 731 | control->txseq = (enh & L2CAP_CTRL_TXSEQ) >> L2CAP_CTRL_TXSEQ_SHIFT; |
| 732 | |
| 733 | control->poll = 0; |
| 734 | control->super = 0; |
| 735 | } |
| 736 | } |
| 737 | |
| 738 | static void __unpack_extended_control(u32 ext, struct l2cap_ctrl *control) |
| 739 | { |
| 740 | control->reqseq = (ext & L2CAP_EXT_CTRL_REQSEQ) >> L2CAP_EXT_CTRL_REQSEQ_SHIFT; |
| 741 | control->final = (ext & L2CAP_EXT_CTRL_FINAL) >> L2CAP_EXT_CTRL_FINAL_SHIFT; |
| 742 | |
| 743 | if (ext & L2CAP_EXT_CTRL_FRAME_TYPE) { |
| 744 | /* S-Frame */ |
| 745 | control->sframe = 1; |
| 746 | control->poll = (ext & L2CAP_EXT_CTRL_POLL) >> L2CAP_EXT_CTRL_POLL_SHIFT; |
| 747 | control->super = (ext & L2CAP_EXT_CTRL_SUPERVISE) >> L2CAP_EXT_CTRL_SUPER_SHIFT; |
| 748 | |
| 749 | control->sar = 0; |
| 750 | control->txseq = 0; |
| 751 | } else { |
| 752 | /* I-Frame */ |
| 753 | control->sframe = 0; |
| 754 | control->sar = (ext & L2CAP_EXT_CTRL_SAR) >> L2CAP_EXT_CTRL_SAR_SHIFT; |
| 755 | control->txseq = (ext & L2CAP_EXT_CTRL_TXSEQ) >> L2CAP_EXT_CTRL_TXSEQ_SHIFT; |
| 756 | |
| 757 | control->poll = 0; |
| 758 | control->super = 0; |
| 759 | } |
| 760 | } |
| 761 | |
| 762 | static inline void __unpack_control(struct l2cap_chan *chan, |
| 763 | struct sk_buff *skb) |
| 764 | { |
| 765 | if (test_bit(FLAG_EXT_CTRL, &chan->flags)) { |
| 766 | __unpack_extended_control(get_unaligned_le32(skb->data), |
| 767 | &bt_cb(skb)->control); |
Mat Martineau | cec8ab6e | 2012-05-17 20:53:36 -0700 | [diff] [blame] | 768 | skb_pull(skb, L2CAP_EXT_CTRL_SIZE); |
Mat Martineau | b5c6aae | 2012-04-25 16:36:15 -0700 | [diff] [blame] | 769 | } else { |
| 770 | __unpack_enhanced_control(get_unaligned_le16(skb->data), |
| 771 | &bt_cb(skb)->control); |
Mat Martineau | cec8ab6e | 2012-05-17 20:53:36 -0700 | [diff] [blame] | 772 | skb_pull(skb, L2CAP_ENH_CTRL_SIZE); |
Mat Martineau | b5c6aae | 2012-04-25 16:36:15 -0700 | [diff] [blame] | 773 | } |
| 774 | } |
| 775 | |
| 776 | static u32 __pack_extended_control(struct l2cap_ctrl *control) |
| 777 | { |
| 778 | u32 packed; |
| 779 | |
| 780 | packed = control->reqseq << L2CAP_EXT_CTRL_REQSEQ_SHIFT; |
| 781 | packed |= control->final << L2CAP_EXT_CTRL_FINAL_SHIFT; |
| 782 | |
| 783 | if (control->sframe) { |
| 784 | packed |= control->poll << L2CAP_EXT_CTRL_POLL_SHIFT; |
| 785 | packed |= control->super << L2CAP_EXT_CTRL_SUPER_SHIFT; |
| 786 | packed |= L2CAP_EXT_CTRL_FRAME_TYPE; |
| 787 | } else { |
| 788 | packed |= control->sar << L2CAP_EXT_CTRL_SAR_SHIFT; |
| 789 | packed |= control->txseq << L2CAP_EXT_CTRL_TXSEQ_SHIFT; |
| 790 | } |
| 791 | |
| 792 | return packed; |
| 793 | } |
| 794 | |
| 795 | static u16 __pack_enhanced_control(struct l2cap_ctrl *control) |
| 796 | { |
| 797 | u16 packed; |
| 798 | |
| 799 | packed = control->reqseq << L2CAP_CTRL_REQSEQ_SHIFT; |
| 800 | packed |= control->final << L2CAP_CTRL_FINAL_SHIFT; |
| 801 | |
| 802 | if (control->sframe) { |
| 803 | packed |= control->poll << L2CAP_CTRL_POLL_SHIFT; |
| 804 | packed |= control->super << L2CAP_CTRL_SUPER_SHIFT; |
| 805 | packed |= L2CAP_CTRL_FRAME_TYPE; |
| 806 | } else { |
| 807 | packed |= control->sar << L2CAP_CTRL_SAR_SHIFT; |
| 808 | packed |= control->txseq << L2CAP_CTRL_TXSEQ_SHIFT; |
| 809 | } |
| 810 | |
| 811 | return packed; |
| 812 | } |
| 813 | |
| 814 | static inline void __pack_control(struct l2cap_chan *chan, |
| 815 | struct l2cap_ctrl *control, |
| 816 | struct sk_buff *skb) |
| 817 | { |
| 818 | if (test_bit(FLAG_EXT_CTRL, &chan->flags)) { |
| 819 | put_unaligned_le32(__pack_extended_control(control), |
| 820 | skb->data + L2CAP_HDR_SIZE); |
| 821 | } else { |
| 822 | put_unaligned_le16(__pack_enhanced_control(control), |
| 823 | skb->data + L2CAP_HDR_SIZE); |
| 824 | } |
| 825 | } |
| 826 | |
Gustavo Padovan | ba7aa64 | 2012-05-29 13:29:16 -0300 | [diff] [blame] | 827 | static inline unsigned int __ertm_hdr_size(struct l2cap_chan *chan) |
| 828 | { |
| 829 | if (test_bit(FLAG_EXT_CTRL, &chan->flags)) |
| 830 | return L2CAP_EXT_HDR_SIZE; |
| 831 | else |
| 832 | return L2CAP_ENH_HDR_SIZE; |
| 833 | } |
| 834 | |
Mat Martineau | a67d7f6 | 2012-05-17 20:53:35 -0700 | [diff] [blame] | 835 | static struct sk_buff *l2cap_create_sframe_pdu(struct l2cap_chan *chan, |
| 836 | u32 control) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 837 | { |
| 838 | struct sk_buff *skb; |
| 839 | struct l2cap_hdr *lh; |
Gustavo Padovan | ba7aa64 | 2012-05-29 13:29:16 -0300 | [diff] [blame] | 840 | int hlen = __ertm_hdr_size(chan); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 841 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 842 | if (chan->fcs == L2CAP_FCS_CRC16) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 843 | hlen += L2CAP_FCS_SIZE; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 844 | |
Mat Martineau | a67d7f6 | 2012-05-17 20:53:35 -0700 | [diff] [blame] | 845 | skb = bt_skb_alloc(hlen, GFP_KERNEL); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 846 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 847 | if (!skb) |
Mat Martineau | a67d7f6 | 2012-05-17 20:53:35 -0700 | [diff] [blame] | 848 | return ERR_PTR(-ENOMEM); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 849 | |
| 850 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 851 | lh->len = cpu_to_le16(hlen - L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 852 | lh->cid = cpu_to_le16(chan->dcid); |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 853 | |
Mat Martineau | a67d7f6 | 2012-05-17 20:53:35 -0700 | [diff] [blame] | 854 | if (test_bit(FLAG_EXT_CTRL, &chan->flags)) |
| 855 | put_unaligned_le32(control, skb_put(skb, L2CAP_EXT_CTRL_SIZE)); |
| 856 | else |
| 857 | put_unaligned_le16(control, skb_put(skb, L2CAP_ENH_CTRL_SIZE)); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 858 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 859 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Mat Martineau | a67d7f6 | 2012-05-17 20:53:35 -0700 | [diff] [blame] | 860 | u16 fcs = crc16(0, (u8 *)skb->data, skb->len); |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 861 | put_unaligned_le16(fcs, skb_put(skb, L2CAP_FCS_SIZE)); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 862 | } |
| 863 | |
Luiz Augusto von Dentz | 73d80de | 2011-11-02 15:52:01 +0200 | [diff] [blame] | 864 | skb->priority = HCI_PRIO_MAX; |
Mat Martineau | a67d7f6 | 2012-05-17 20:53:35 -0700 | [diff] [blame] | 865 | return skb; |
| 866 | } |
| 867 | |
| 868 | static void l2cap_send_sframe(struct l2cap_chan *chan, |
| 869 | struct l2cap_ctrl *control) |
| 870 | { |
| 871 | struct sk_buff *skb; |
| 872 | u32 control_field; |
| 873 | |
| 874 | BT_DBG("chan %p, control %p", chan, control); |
| 875 | |
| 876 | if (!control->sframe) |
| 877 | return; |
| 878 | |
| 879 | if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state) && |
| 880 | !control->poll) |
| 881 | control->final = 1; |
| 882 | |
| 883 | if (control->super == L2CAP_SUPER_RR) |
| 884 | clear_bit(CONN_RNR_SENT, &chan->conn_state); |
| 885 | else if (control->super == L2CAP_SUPER_RNR) |
| 886 | set_bit(CONN_RNR_SENT, &chan->conn_state); |
| 887 | |
| 888 | if (control->super != L2CAP_SUPER_SREJ) { |
| 889 | chan->last_acked_seq = control->reqseq; |
| 890 | __clear_ack_timer(chan); |
| 891 | } |
| 892 | |
| 893 | BT_DBG("reqseq %d, final %d, poll %d, super %d", control->reqseq, |
| 894 | control->final, control->poll, control->super); |
| 895 | |
| 896 | if (test_bit(FLAG_EXT_CTRL, &chan->flags)) |
| 897 | control_field = __pack_extended_control(control); |
| 898 | else |
| 899 | control_field = __pack_enhanced_control(control); |
| 900 | |
| 901 | skb = l2cap_create_sframe_pdu(chan, control_field); |
| 902 | if (!IS_ERR(skb)) |
| 903 | l2cap_do_send(chan, skb); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 904 | } |
| 905 | |
Mat Martineau | c9e3d5e | 2012-05-17 20:53:48 -0700 | [diff] [blame] | 906 | static void l2cap_send_rr_or_rnr(struct l2cap_chan *chan, bool poll) |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 907 | { |
Mat Martineau | c9e3d5e | 2012-05-17 20:53:48 -0700 | [diff] [blame] | 908 | struct l2cap_ctrl control; |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 909 | |
Mat Martineau | c9e3d5e | 2012-05-17 20:53:48 -0700 | [diff] [blame] | 910 | BT_DBG("chan %p, poll %d", chan, poll); |
| 911 | |
| 912 | memset(&control, 0, sizeof(control)); |
| 913 | control.sframe = 1; |
| 914 | control.poll = poll; |
| 915 | |
| 916 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) |
| 917 | control.super = L2CAP_SUPER_RNR; |
| 918 | else |
| 919 | control.super = L2CAP_SUPER_RR; |
| 920 | |
| 921 | control.reqseq = chan->buffer_seq; |
| 922 | l2cap_send_sframe(chan, &control); |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 923 | } |
| 924 | |
Gustavo F. Padovan | b445003 | 2011-04-12 18:15:09 -0300 | [diff] [blame] | 925 | static inline int __l2cap_no_conn_pending(struct l2cap_chan *chan) |
Andrei Emeltchenko | e501d05 | 2010-07-08 12:14:41 +0300 | [diff] [blame] | 926 | { |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 927 | return !test_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Andrei Emeltchenko | e501d05 | 2010-07-08 12:14:41 +0300 | [diff] [blame] | 928 | } |
| 929 | |
Andrei Emeltchenko | 9b27f35 | 2012-02-24 16:00:00 +0200 | [diff] [blame] | 930 | static void l2cap_send_conn_req(struct l2cap_chan *chan) |
| 931 | { |
| 932 | struct l2cap_conn *conn = chan->conn; |
| 933 | struct l2cap_conn_req req; |
| 934 | |
| 935 | req.scid = cpu_to_le16(chan->scid); |
| 936 | req.psm = chan->psm; |
| 937 | |
| 938 | chan->ident = l2cap_get_ident(conn); |
| 939 | |
| 940 | set_bit(CONF_CONNECT_PEND, &chan->conf_state); |
| 941 | |
| 942 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_REQ, sizeof(req), &req); |
| 943 | } |
| 944 | |
Vinicius Costa Gomes | 9f0caeb | 2012-04-20 15:46:08 -0300 | [diff] [blame] | 945 | static void l2cap_chan_ready(struct l2cap_chan *chan) |
| 946 | { |
Mat Martineau | 2827011 | 2012-05-17 21:14:09 -0700 | [diff] [blame] | 947 | /* This clears all conf flags, including CONF_NOT_COMPLETE */ |
Vinicius Costa Gomes | 9f0caeb | 2012-04-20 15:46:08 -0300 | [diff] [blame] | 948 | chan->conf_state = 0; |
| 949 | __clear_chan_timer(chan); |
| 950 | |
Andrei Emeltchenko | 54a59aa | 2012-05-27 22:27:53 -0300 | [diff] [blame] | 951 | chan->state = BT_CONNECTED; |
Vinicius Costa Gomes | 9f0caeb | 2012-04-20 15:46:08 -0300 | [diff] [blame] | 952 | |
Andrei Emeltchenko | fd83e2c | 2012-05-30 09:55:32 +0300 | [diff] [blame] | 953 | chan->ops->ready(chan); |
Vinicius Costa Gomes | 9f0caeb | 2012-04-20 15:46:08 -0300 | [diff] [blame] | 954 | } |
| 955 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 956 | static void l2cap_do_start(struct l2cap_chan *chan) |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 957 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 958 | struct l2cap_conn *conn = chan->conn; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 959 | |
Vinicius Costa Gomes | 9f0caeb | 2012-04-20 15:46:08 -0300 | [diff] [blame] | 960 | if (conn->hcon->type == LE_LINK) { |
| 961 | l2cap_chan_ready(chan); |
| 962 | return; |
| 963 | } |
| 964 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 965 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) { |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 966 | if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)) |
| 967 | return; |
| 968 | |
Gustavo F. Padovan | d45fc42 | 2011-11-05 19:54:24 -0200 | [diff] [blame] | 969 | if (l2cap_chan_check_security(chan) && |
Andrei Emeltchenko | 9b27f35 | 2012-02-24 16:00:00 +0200 | [diff] [blame] | 970 | __l2cap_no_conn_pending(chan)) |
| 971 | l2cap_send_conn_req(chan); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 972 | } else { |
| 973 | struct l2cap_info_req req; |
Andrei Emeltchenko | ac73498 | 2012-05-24 15:42:51 +0300 | [diff] [blame] | 974 | req.type = __constant_cpu_to_le16(L2CAP_IT_FEAT_MASK); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 975 | |
| 976 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; |
| 977 | conn->info_ident = l2cap_get_ident(conn); |
| 978 | |
Marcel Holtmann | ba13ccd | 2012-03-01 14:25:33 -0800 | [diff] [blame] | 979 | schedule_delayed_work(&conn->info_timer, L2CAP_INFO_TIMEOUT); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 980 | |
| 981 | l2cap_send_cmd(conn, conn->info_ident, |
| 982 | L2CAP_INFO_REQ, sizeof(req), &req); |
| 983 | } |
| 984 | } |
| 985 | |
Gustavo F. Padovan | cf6c2c0 | 2010-06-07 20:54:45 -0300 | [diff] [blame] | 986 | static inline int l2cap_mode_supported(__u8 mode, __u32 feat_mask) |
| 987 | { |
| 988 | u32 local_feat_mask = l2cap_feat_mask; |
Gustavo F. Padovan | d1c4a17 | 2010-07-18 16:25:54 -0300 | [diff] [blame] | 989 | if (!disable_ertm) |
Gustavo F. Padovan | cf6c2c0 | 2010-06-07 20:54:45 -0300 | [diff] [blame] | 990 | local_feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING; |
| 991 | |
| 992 | switch (mode) { |
| 993 | case L2CAP_MODE_ERTM: |
| 994 | return L2CAP_FEAT_ERTM & feat_mask & local_feat_mask; |
| 995 | case L2CAP_MODE_STREAMING: |
| 996 | return L2CAP_FEAT_STREAMING & feat_mask & local_feat_mask; |
| 997 | default: |
| 998 | return 0x00; |
| 999 | } |
| 1000 | } |
| 1001 | |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 1002 | 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] | 1003 | { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1004 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 1005 | struct l2cap_disconn_req req; |
| 1006 | |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 1007 | if (!conn) |
| 1008 | return; |
| 1009 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 1010 | if (chan->mode == L2CAP_MODE_ERTM) { |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 1011 | __clear_retrans_timer(chan); |
| 1012 | __clear_monitor_timer(chan); |
| 1013 | __clear_ack_timer(chan); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 1014 | } |
| 1015 | |
Andrei Emeltchenko | 416fa75 | 2012-05-29 13:59:16 +0300 | [diff] [blame] | 1016 | if (chan->chan_type == L2CAP_CHAN_CONN_FIX_A2MP) { |
| 1017 | __l2cap_state_change(chan, BT_DISCONN); |
| 1018 | return; |
| 1019 | } |
| 1020 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1021 | req.dcid = cpu_to_le16(chan->dcid); |
| 1022 | req.scid = cpu_to_le16(chan->scid); |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 1023 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
| 1024 | L2CAP_DISCONN_REQ, sizeof(req), &req); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 1025 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1026 | lock_sock(sk); |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 1027 | __l2cap_state_change(chan, BT_DISCONN); |
Andrei Emeltchenko | 2e0052e | 2012-02-21 12:54:58 +0200 | [diff] [blame] | 1028 | __l2cap_chan_set_err(chan, err); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1029 | release_sock(sk); |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 1030 | } |
| 1031 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | /* ---- L2CAP connections ---- */ |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1033 | static void l2cap_conn_start(struct l2cap_conn *conn) |
| 1034 | { |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1035 | struct l2cap_chan *chan, *tmp; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1036 | |
| 1037 | BT_DBG("conn %p", conn); |
| 1038 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1039 | mutex_lock(&conn->chan_lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1040 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1041 | list_for_each_entry_safe(chan, tmp, &conn->chan_l, list) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1042 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1043 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1044 | l2cap_chan_lock(chan); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1045 | |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 1046 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1047 | l2cap_chan_unlock(chan); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1048 | continue; |
| 1049 | } |
| 1050 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1051 | if (chan->state == BT_CONNECT) { |
Gustavo F. Padovan | d45fc42 | 2011-11-05 19:54:24 -0200 | [diff] [blame] | 1052 | if (!l2cap_chan_check_security(chan) || |
Gustavo F. Padovan | b445003 | 2011-04-12 18:15:09 -0300 | [diff] [blame] | 1053 | !__l2cap_no_conn_pending(chan)) { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1054 | l2cap_chan_unlock(chan); |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 1055 | continue; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 1056 | } |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 1057 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 1058 | if (!l2cap_mode_supported(chan->mode, conn->feat_mask) |
| 1059 | && test_bit(CONF_STATE2_DEVICE, |
| 1060 | &chan->conf_state)) { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1061 | l2cap_chan_close(chan, ECONNRESET); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1062 | l2cap_chan_unlock(chan); |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 1063 | continue; |
| 1064 | } |
| 1065 | |
Andrei Emeltchenko | 9b27f35 | 2012-02-24 16:00:00 +0200 | [diff] [blame] | 1066 | l2cap_send_conn_req(chan); |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 1067 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1068 | } else if (chan->state == BT_CONNECT2) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1069 | struct l2cap_conn_rsp rsp; |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 1070 | char buf[128]; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1071 | rsp.scid = cpu_to_le16(chan->dcid); |
| 1072 | rsp.dcid = cpu_to_le16(chan->scid); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1073 | |
Gustavo F. Padovan | d45fc42 | 2011-11-05 19:54:24 -0200 | [diff] [blame] | 1074 | if (l2cap_chan_check_security(chan)) { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1075 | lock_sock(sk); |
Gustavo Padovan | c5daa68 | 2012-05-16 12:17:10 -0300 | [diff] [blame] | 1076 | if (test_bit(BT_SK_DEFER_SETUP, |
| 1077 | &bt_sk(sk)->flags)) { |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 1078 | struct sock *parent = bt_sk(sk)->parent; |
Andrei Emeltchenko | ac73498 | 2012-05-24 15:42:51 +0300 | [diff] [blame] | 1079 | rsp.result = __constant_cpu_to_le16(L2CAP_CR_PEND); |
| 1080 | rsp.status = __constant_cpu_to_le16(L2CAP_CS_AUTHOR_PEND); |
Ilia Kolomisnky | 05e9a2f | 2011-07-15 18:30:21 +0000 | [diff] [blame] | 1081 | if (parent) |
| 1082 | parent->sk_data_ready(parent, 0); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 1083 | |
| 1084 | } else { |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 1085 | __l2cap_state_change(chan, BT_CONFIG); |
Andrei Emeltchenko | ac73498 | 2012-05-24 15:42:51 +0300 | [diff] [blame] | 1086 | rsp.result = __constant_cpu_to_le16(L2CAP_CR_SUCCESS); |
| 1087 | rsp.status = __constant_cpu_to_le16(L2CAP_CS_NO_INFO); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 1088 | } |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1089 | release_sock(sk); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1090 | } else { |
Andrei Emeltchenko | ac73498 | 2012-05-24 15:42:51 +0300 | [diff] [blame] | 1091 | rsp.result = __constant_cpu_to_le16(L2CAP_CR_PEND); |
| 1092 | rsp.status = __constant_cpu_to_le16(L2CAP_CS_AUTHEN_PEND); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1093 | } |
| 1094 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 1095 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, |
| 1096 | sizeof(rsp), &rsp); |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 1097 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 1098 | if (test_bit(CONF_REQ_SENT, &chan->conf_state) || |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 1099 | rsp.result != L2CAP_CR_SUCCESS) { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1100 | l2cap_chan_unlock(chan); |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 1101 | continue; |
| 1102 | } |
| 1103 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 1104 | set_bit(CONF_REQ_SENT, &chan->conf_state); |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 1105 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 1106 | l2cap_build_conf_req(chan, buf), buf); |
| 1107 | chan->num_conf_req++; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1108 | } |
| 1109 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1110 | l2cap_chan_unlock(chan); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1111 | } |
| 1112 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1113 | mutex_unlock(&conn->chan_lock); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1114 | } |
| 1115 | |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1116 | /* Find socket with cid and source/destination bdaddr. |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1117 | * Returns closest match, locked. |
| 1118 | */ |
Andrei Emeltchenko | d9b8870 | 2012-03-12 12:13:08 +0200 | [diff] [blame] | 1119 | static struct l2cap_chan *l2cap_global_chan_by_scid(int state, u16 cid, |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1120 | bdaddr_t *src, |
| 1121 | bdaddr_t *dst) |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1122 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1123 | struct l2cap_chan *c, *c1 = NULL; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1124 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1125 | read_lock(&chan_list_lock); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1126 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1127 | list_for_each_entry(c, &chan_list, global_l) { |
| 1128 | struct sock *sk = c->sk; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1129 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1130 | if (state && c->state != state) |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1131 | continue; |
| 1132 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1133 | if (c->scid == cid) { |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1134 | int src_match, dst_match; |
| 1135 | int src_any, dst_any; |
| 1136 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1137 | /* Exact match. */ |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1138 | src_match = !bacmp(&bt_sk(sk)->src, src); |
| 1139 | dst_match = !bacmp(&bt_sk(sk)->dst, dst); |
| 1140 | if (src_match && dst_match) { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1141 | read_unlock(&chan_list_lock); |
| 1142 | return c; |
| 1143 | } |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1144 | |
| 1145 | /* Closest match */ |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1146 | src_any = !bacmp(&bt_sk(sk)->src, BDADDR_ANY); |
| 1147 | dst_any = !bacmp(&bt_sk(sk)->dst, BDADDR_ANY); |
| 1148 | if ((src_match && dst_any) || (src_any && dst_match) || |
| 1149 | (src_any && dst_any)) |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1150 | c1 = c; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1151 | } |
| 1152 | } |
Gustavo F. Padovan | 280f294 | 2011-04-13 19:01:22 -0300 | [diff] [blame] | 1153 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1154 | read_unlock(&chan_list_lock); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1155 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1156 | return c1; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1157 | } |
| 1158 | |
| 1159 | static void l2cap_le_conn_ready(struct l2cap_conn *conn) |
| 1160 | { |
Gustavo F. Padovan | c916fbe | 2011-04-04 16:00:55 -0300 | [diff] [blame] | 1161 | struct sock *parent, *sk; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1162 | struct l2cap_chan *chan, *pchan; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1163 | |
| 1164 | BT_DBG(""); |
| 1165 | |
| 1166 | /* Check if we have socket listening on cid */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1167 | pchan = l2cap_global_chan_by_scid(BT_LISTEN, L2CAP_CID_LE_DATA, |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1168 | conn->src, conn->dst); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1169 | if (!pchan) |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1170 | return; |
| 1171 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1172 | parent = pchan->sk; |
| 1173 | |
Gustavo F. Padovan | aa2ac88 | 2011-06-24 01:53:01 -0300 | [diff] [blame] | 1174 | lock_sock(parent); |
Gustavo F. Padovan | 62f3a2c | 2011-04-14 18:34:34 -0300 | [diff] [blame] | 1175 | |
Gustavo Padovan | 80b9802 | 2012-05-27 22:27:51 -0300 | [diff] [blame] | 1176 | chan = pchan->ops->new_connection(pchan); |
Gustavo F. Padovan | 80808e4 | 2011-05-16 17:24:37 -0300 | [diff] [blame] | 1177 | if (!chan) |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1178 | goto clean; |
| 1179 | |
Gustavo F. Padovan | 80808e4 | 2011-05-16 17:24:37 -0300 | [diff] [blame] | 1180 | sk = chan->sk; |
Gustavo F. Padovan | 5d41ce1 | 2011-04-08 15:40:02 -0300 | [diff] [blame] | 1181 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1182 | hci_conn_hold(conn->hcon); |
| 1183 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1184 | bacpy(&bt_sk(sk)->src, conn->src); |
| 1185 | bacpy(&bt_sk(sk)->dst, conn->dst); |
| 1186 | |
Gustavo F. Padovan | d101024 | 2011-03-25 00:39:48 -0300 | [diff] [blame] | 1187 | bt_accept_enqueue(parent, sk); |
| 1188 | |
Gustavo F. Padovan | 3d57dc6 | 2011-12-17 10:56:45 -0200 | [diff] [blame] | 1189 | l2cap_chan_add(conn, chan); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1190 | |
Gustavo Padovan | 6754e0d | 2012-05-25 09:30:56 -0300 | [diff] [blame] | 1191 | l2cap_chan_ready(chan); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1192 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1193 | clean: |
Gustavo F. Padovan | aa2ac88 | 2011-06-24 01:53:01 -0300 | [diff] [blame] | 1194 | release_sock(parent); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1195 | } |
| 1196 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1197 | static void l2cap_conn_ready(struct l2cap_conn *conn) |
| 1198 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1199 | struct l2cap_chan *chan; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1200 | |
| 1201 | BT_DBG("conn %p", conn); |
| 1202 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1203 | if (!conn->hcon->out && conn->hcon->type == LE_LINK) |
| 1204 | l2cap_le_conn_ready(conn); |
| 1205 | |
Vinicius Costa Gomes | 160dc6a | 2011-08-19 21:06:55 -0300 | [diff] [blame] | 1206 | if (conn->hcon->out && conn->hcon->type == LE_LINK) |
| 1207 | smp_conn_security(conn, conn->hcon->pending_sec_level); |
| 1208 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1209 | mutex_lock(&conn->chan_lock); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1210 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1211 | list_for_each_entry(chan, &conn->chan_l, list) { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1212 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1213 | l2cap_chan_lock(chan); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1214 | |
Andrei Emeltchenko | 416fa75 | 2012-05-29 13:59:16 +0300 | [diff] [blame] | 1215 | if (chan->chan_type == L2CAP_CHAN_CONN_FIX_A2MP) { |
| 1216 | l2cap_chan_unlock(chan); |
| 1217 | continue; |
| 1218 | } |
| 1219 | |
Vinicius Costa Gomes | 6312845 | 2011-06-17 22:46:26 -0300 | [diff] [blame] | 1220 | if (conn->hcon->type == LE_LINK) { |
Anderson Briglia | b501d6a | 2011-06-07 18:46:31 -0300 | [diff] [blame] | 1221 | if (smp_conn_security(conn, chan->sec_level)) |
Andrei Emeltchenko | cf4cd00 | 2012-02-06 15:03:59 +0200 | [diff] [blame] | 1222 | l2cap_chan_ready(chan); |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 1223 | |
Vinicius Costa Gomes | 6312845 | 2011-06-17 22:46:26 -0300 | [diff] [blame] | 1224 | } else if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1225 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 1226 | __clear_chan_timer(chan); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1227 | lock_sock(sk); |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 1228 | __l2cap_state_change(chan, BT_CONNECTED); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1229 | sk->sk_state_change(sk); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1230 | release_sock(sk); |
Anderson Briglia | b501d6a | 2011-06-07 18:46:31 -0300 | [diff] [blame] | 1231 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1232 | } else if (chan->state == BT_CONNECT) |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 1233 | l2cap_do_start(chan); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1234 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1235 | l2cap_chan_unlock(chan); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1236 | } |
| 1237 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1238 | mutex_unlock(&conn->chan_lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1239 | } |
| 1240 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1241 | /* Notify sockets that we cannot guaranty reliability anymore */ |
| 1242 | static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) |
| 1243 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1244 | struct l2cap_chan *chan; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1245 | |
| 1246 | BT_DBG("conn %p", conn); |
| 1247 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1248 | mutex_lock(&conn->chan_lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1249 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1250 | list_for_each_entry(chan, &conn->chan_l, list) { |
Andrei Emeltchenko | ecf61bd | 2011-10-11 14:04:32 +0300 | [diff] [blame] | 1251 | if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags)) |
Andrei Emeltchenko | 2e0052e | 2012-02-21 12:54:58 +0200 | [diff] [blame] | 1252 | __l2cap_chan_set_err(chan, err); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1253 | } |
| 1254 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1255 | mutex_unlock(&conn->chan_lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1256 | } |
| 1257 | |
Gustavo F. Padovan | f878fca | 2011-12-15 01:16:14 -0200 | [diff] [blame] | 1258 | static void l2cap_info_timeout(struct work_struct *work) |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1259 | { |
Gustavo F. Padovan | f878fca | 2011-12-15 01:16:14 -0200 | [diff] [blame] | 1260 | struct l2cap_conn *conn = container_of(work, struct l2cap_conn, |
Gustavo F. Padovan | 030013d | 2011-12-20 10:57:28 -0200 | [diff] [blame] | 1261 | info_timer.work); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1262 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 1263 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 1264 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 1265 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1266 | l2cap_conn_start(conn); |
| 1267 | } |
| 1268 | |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1269 | static void l2cap_conn_del(struct hci_conn *hcon, int err) |
| 1270 | { |
| 1271 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 1272 | struct l2cap_chan *chan, *l; |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1273 | |
| 1274 | if (!conn) |
| 1275 | return; |
| 1276 | |
| 1277 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); |
| 1278 | |
| 1279 | kfree_skb(conn->rx_skb); |
| 1280 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1281 | mutex_lock(&conn->chan_lock); |
| 1282 | |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1283 | /* Kill channels */ |
| 1284 | list_for_each_entry_safe(chan, l, &conn->chan_l, list) { |
Mat Martineau | 61d6ef3 | 2012-04-27 16:50:50 -0700 | [diff] [blame] | 1285 | l2cap_chan_hold(chan); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1286 | l2cap_chan_lock(chan); |
| 1287 | |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1288 | l2cap_chan_del(chan, err); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1289 | |
| 1290 | l2cap_chan_unlock(chan); |
| 1291 | |
Gustavo Padovan | 80b9802 | 2012-05-27 22:27:51 -0300 | [diff] [blame] | 1292 | chan->ops->close(chan); |
Mat Martineau | 61d6ef3 | 2012-04-27 16:50:50 -0700 | [diff] [blame] | 1293 | l2cap_chan_put(chan); |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1294 | } |
| 1295 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1296 | mutex_unlock(&conn->chan_lock); |
| 1297 | |
Luiz Augusto von Dentz | 73d80de | 2011-11-02 15:52:01 +0200 | [diff] [blame] | 1298 | hci_chan_del(conn->hchan); |
| 1299 | |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1300 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) |
Ulisses Furquim | 127074b | 2012-01-30 18:26:29 -0200 | [diff] [blame] | 1301 | cancel_delayed_work_sync(&conn->info_timer); |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1302 | |
Johan Hedberg | 51a8efd | 2012-01-16 06:10:31 +0200 | [diff] [blame] | 1303 | if (test_and_clear_bit(HCI_CONN_LE_SMP_PEND, &hcon->flags)) { |
Ulisses Furquim | 127074b | 2012-01-30 18:26:29 -0200 | [diff] [blame] | 1304 | cancel_delayed_work_sync(&conn->security_timer); |
Vinicius Costa Gomes | 8aab475 | 2011-09-05 14:31:31 -0300 | [diff] [blame] | 1305 | smp_chan_destroy(conn); |
Vinicius Costa Gomes | d26a234 | 2011-08-19 21:06:51 -0300 | [diff] [blame] | 1306 | } |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1307 | |
| 1308 | hcon->l2cap_data = NULL; |
| 1309 | kfree(conn); |
| 1310 | } |
| 1311 | |
Gustavo F. Padovan | 6c9d42a | 2011-12-20 10:57:27 -0200 | [diff] [blame] | 1312 | static void security_timeout(struct work_struct *work) |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1313 | { |
Gustavo F. Padovan | 6c9d42a | 2011-12-20 10:57:27 -0200 | [diff] [blame] | 1314 | struct l2cap_conn *conn = container_of(work, struct l2cap_conn, |
| 1315 | security_timer.work); |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1316 | |
Johan Hedberg | d06cc41 | 2012-06-06 18:44:11 +0800 | [diff] [blame] | 1317 | BT_DBG("conn %p", conn); |
| 1318 | |
| 1319 | if (test_and_clear_bit(HCI_CONN_LE_SMP_PEND, &conn->hcon->flags)) { |
| 1320 | smp_chan_destroy(conn); |
| 1321 | l2cap_conn_del(conn->hcon, ETIMEDOUT); |
| 1322 | } |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1323 | } |
| 1324 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1325 | static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) |
| 1326 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 1327 | struct l2cap_conn *conn = hcon->l2cap_data; |
Luiz Augusto von Dentz | 73d80de | 2011-11-02 15:52:01 +0200 | [diff] [blame] | 1328 | struct hci_chan *hchan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 1330 | if (conn || status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | return conn; |
| 1332 | |
Luiz Augusto von Dentz | 73d80de | 2011-11-02 15:52:01 +0200 | [diff] [blame] | 1333 | hchan = hci_chan_create(hcon); |
| 1334 | if (!hchan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1335 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1336 | |
Luiz Augusto von Dentz | 73d80de | 2011-11-02 15:52:01 +0200 | [diff] [blame] | 1337 | conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC); |
| 1338 | if (!conn) { |
| 1339 | hci_chan_del(hchan); |
| 1340 | return NULL; |
| 1341 | } |
| 1342 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1343 | hcon->l2cap_data = conn; |
| 1344 | conn->hcon = hcon; |
Luiz Augusto von Dentz | 73d80de | 2011-11-02 15:52:01 +0200 | [diff] [blame] | 1345 | conn->hchan = hchan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1346 | |
Luiz Augusto von Dentz | 73d80de | 2011-11-02 15:52:01 +0200 | [diff] [blame] | 1347 | BT_DBG("hcon %p conn %p hchan %p", hcon, conn, hchan); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 1348 | |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 1349 | if (hcon->hdev->le_mtu && hcon->type == LE_LINK) |
| 1350 | conn->mtu = hcon->hdev->le_mtu; |
| 1351 | else |
| 1352 | conn->mtu = hcon->hdev->acl_mtu; |
| 1353 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1354 | conn->src = &hcon->hdev->bdaddr; |
| 1355 | conn->dst = &hcon->dst; |
| 1356 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1357 | conn->feat_mask = 0; |
| 1358 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | spin_lock_init(&conn->lock); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 1360 | mutex_init(&conn->chan_lock); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1361 | |
| 1362 | INIT_LIST_HEAD(&conn->chan_l); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1364 | if (hcon->type == LE_LINK) |
Gustavo F. Padovan | 6c9d42a | 2011-12-20 10:57:27 -0200 | [diff] [blame] | 1365 | INIT_DELAYED_WORK(&conn->security_timer, security_timeout); |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1366 | else |
Gustavo F. Padovan | 030013d | 2011-12-20 10:57:28 -0200 | [diff] [blame] | 1367 | INIT_DELAYED_WORK(&conn->info_timer, l2cap_info_timeout); |
Dave Young | 45054dc | 2009-10-18 20:28:30 +0000 | [diff] [blame] | 1368 | |
Andrei Emeltchenko | 9f5a0d7 | 2011-11-07 14:20:25 +0200 | [diff] [blame] | 1369 | conn->disc_reason = HCI_ERROR_REMOTE_USER_TERM; |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 1370 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | return conn; |
| 1372 | } |
| 1373 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | /* ---- Socket interface ---- */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1375 | |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1376 | /* Find socket with psm and source / destination bdaddr. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1377 | * Returns closest match. |
| 1378 | */ |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1379 | static struct l2cap_chan *l2cap_global_chan_by_psm(int state, __le16 psm, |
| 1380 | bdaddr_t *src, |
| 1381 | bdaddr_t *dst) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1382 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1383 | struct l2cap_chan *c, *c1 = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1384 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1385 | read_lock(&chan_list_lock); |
Gustavo F. Padovan | e0f0cb5 | 2010-11-01 18:43:53 +0000 | [diff] [blame] | 1386 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1387 | list_for_each_entry(c, &chan_list, global_l) { |
| 1388 | struct sock *sk = c->sk; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1389 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1390 | if (state && c->state != state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | continue; |
| 1392 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1393 | if (c->psm == psm) { |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1394 | int src_match, dst_match; |
| 1395 | int src_any, dst_any; |
| 1396 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1397 | /* Exact match. */ |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1398 | src_match = !bacmp(&bt_sk(sk)->src, src); |
| 1399 | dst_match = !bacmp(&bt_sk(sk)->dst, dst); |
| 1400 | if (src_match && dst_match) { |
Johannes Berg | a7567b2 | 2011-06-01 08:29:54 +0200 | [diff] [blame] | 1401 | read_unlock(&chan_list_lock); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1402 | return c; |
| 1403 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1404 | |
| 1405 | /* Closest match */ |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 1406 | src_any = !bacmp(&bt_sk(sk)->src, BDADDR_ANY); |
| 1407 | dst_any = !bacmp(&bt_sk(sk)->dst, BDADDR_ANY); |
| 1408 | if ((src_match && dst_any) || (src_any && dst_match) || |
| 1409 | (src_any && dst_any)) |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1410 | c1 = c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1411 | } |
| 1412 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1413 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1414 | read_unlock(&chan_list_lock); |
Gustavo F. Padovan | e0f0cb5 | 2010-11-01 18:43:53 +0000 | [diff] [blame] | 1415 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1416 | return c1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1417 | } |
| 1418 | |
Andre Guedes | 8e9f989 | 2012-04-24 21:02:55 -0300 | [diff] [blame] | 1419 | int l2cap_chan_connect(struct l2cap_chan *chan, __le16 psm, u16 cid, |
| 1420 | bdaddr_t *dst, u8 dst_type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1421 | { |
Gustavo F. Padovan | 5d41ce1 | 2011-04-08 15:40:02 -0300 | [diff] [blame] | 1422 | struct sock *sk = chan->sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1423 | bdaddr_t *src = &bt_sk(sk)->src; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1424 | struct l2cap_conn *conn; |
| 1425 | struct hci_conn *hcon; |
| 1426 | struct hci_dev *hdev; |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 1427 | __u8 auth_type; |
Marcel Holtmann | 44d0e48 | 2009-04-20 07:09:16 +0200 | [diff] [blame] | 1428 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1429 | |
Andre Guedes | 8e9f989 | 2012-04-24 21:02:55 -0300 | [diff] [blame] | 1430 | BT_DBG("%s -> %s (type %u) psm 0x%2.2x", batostr(src), batostr(dst), |
| 1431 | dst_type, __le16_to_cpu(chan->psm)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1432 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 1433 | hdev = hci_get_route(dst, src); |
| 1434 | if (!hdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | return -EHOSTUNREACH; |
| 1436 | |
Gustavo F. Padovan | 09fd0de | 2011-06-17 13:03:21 -0300 | [diff] [blame] | 1437 | hci_dev_lock(hdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1438 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1439 | l2cap_chan_lock(chan); |
Gustavo F. Padovan | 03a0019 | 2011-12-09 04:48:17 -0200 | [diff] [blame] | 1440 | |
| 1441 | /* PSM must be odd and lsb of upper byte must be 0 */ |
| 1442 | if ((__le16_to_cpu(psm) & 0x0101) != 0x0001 && !cid && |
| 1443 | chan->chan_type != L2CAP_CHAN_RAW) { |
| 1444 | err = -EINVAL; |
| 1445 | goto done; |
| 1446 | } |
| 1447 | |
| 1448 | if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && !(psm || cid)) { |
| 1449 | err = -EINVAL; |
| 1450 | goto done; |
| 1451 | } |
| 1452 | |
| 1453 | switch (chan->mode) { |
| 1454 | case L2CAP_MODE_BASIC: |
| 1455 | break; |
| 1456 | case L2CAP_MODE_ERTM: |
| 1457 | case L2CAP_MODE_STREAMING: |
| 1458 | if (!disable_ertm) |
| 1459 | break; |
| 1460 | /* fall through */ |
| 1461 | default: |
| 1462 | err = -ENOTSUPP; |
| 1463 | goto done; |
| 1464 | } |
| 1465 | |
Gustavo Padovan | 0797e01 | 2012-05-27 22:27:54 -0300 | [diff] [blame] | 1466 | switch (chan->state) { |
Gustavo F. Padovan | 03a0019 | 2011-12-09 04:48:17 -0200 | [diff] [blame] | 1467 | case BT_CONNECT: |
| 1468 | case BT_CONNECT2: |
| 1469 | case BT_CONFIG: |
| 1470 | /* Already connecting */ |
| 1471 | err = 0; |
| 1472 | goto done; |
| 1473 | |
| 1474 | case BT_CONNECTED: |
| 1475 | /* Already connected */ |
| 1476 | err = -EISCONN; |
| 1477 | goto done; |
| 1478 | |
| 1479 | case BT_OPEN: |
| 1480 | case BT_BOUND: |
| 1481 | /* Can connect */ |
| 1482 | break; |
| 1483 | |
| 1484 | default: |
| 1485 | err = -EBADFD; |
| 1486 | goto done; |
| 1487 | } |
| 1488 | |
| 1489 | /* Set destination address and psm */ |
Gustavo Padovan | 0797e01 | 2012-05-27 22:27:54 -0300 | [diff] [blame] | 1490 | lock_sock(sk); |
Gustavo F. Padovan | 9219b2a | 2012-01-02 20:08:04 -0200 | [diff] [blame] | 1491 | bacpy(&bt_sk(sk)->dst, dst); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1492 | release_sock(sk); |
| 1493 | |
Gustavo F. Padovan | 03a0019 | 2011-12-09 04:48:17 -0200 | [diff] [blame] | 1494 | chan->psm = psm; |
| 1495 | chan->dcid = cid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1496 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1497 | auth_type = l2cap_get_auth_type(chan); |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 1498 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1499 | if (chan->dcid == L2CAP_CID_LE_DATA) |
Andre Guedes | 8e9f989 | 2012-04-24 21:02:55 -0300 | [diff] [blame] | 1500 | hcon = hci_connect(hdev, LE_LINK, dst, dst_type, |
Andre Guedes | b12f62c | 2012-04-24 21:02:54 -0300 | [diff] [blame] | 1501 | chan->sec_level, auth_type); |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 1502 | else |
Andre Guedes | 8e9f989 | 2012-04-24 21:02:55 -0300 | [diff] [blame] | 1503 | hcon = hci_connect(hdev, ACL_LINK, dst, dst_type, |
Andre Guedes | b12f62c | 2012-04-24 21:02:54 -0300 | [diff] [blame] | 1504 | chan->sec_level, auth_type); |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 1505 | |
Ville Tervo | 30e7627 | 2011-02-22 16:10:53 -0300 | [diff] [blame] | 1506 | if (IS_ERR(hcon)) { |
| 1507 | err = PTR_ERR(hcon); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1508 | goto done; |
Ville Tervo | 30e7627 | 2011-02-22 16:10:53 -0300 | [diff] [blame] | 1509 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1510 | |
| 1511 | conn = l2cap_conn_add(hcon, 0); |
| 1512 | if (!conn) { |
| 1513 | hci_conn_put(hcon); |
Ville Tervo | 30e7627 | 2011-02-22 16:10:53 -0300 | [diff] [blame] | 1514 | err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1515 | goto done; |
| 1516 | } |
| 1517 | |
Vinicius Costa Gomes | 9f0caeb | 2012-04-20 15:46:08 -0300 | [diff] [blame] | 1518 | if (hcon->type == LE_LINK) { |
| 1519 | err = 0; |
| 1520 | |
| 1521 | if (!list_empty(&conn->chan_l)) { |
| 1522 | err = -EBUSY; |
| 1523 | hci_conn_put(hcon); |
| 1524 | } |
| 1525 | |
| 1526 | if (err) |
| 1527 | goto done; |
| 1528 | } |
| 1529 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1530 | /* Update source addr of the socket */ |
| 1531 | bacpy(src, conn->src); |
| 1532 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1533 | l2cap_chan_unlock(chan); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1534 | l2cap_chan_add(conn, chan); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1535 | l2cap_chan_lock(chan); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1536 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1537 | l2cap_state_change(chan, BT_CONNECT); |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 1538 | __set_chan_timer(chan, sk->sk_sndtimeo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1539 | |
| 1540 | if (hcon->state == BT_CONNECTED) { |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 1541 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 1542 | __clear_chan_timer(chan); |
Gustavo F. Padovan | d45fc42 | 2011-11-05 19:54:24 -0200 | [diff] [blame] | 1543 | if (l2cap_chan_check_security(chan)) |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1544 | l2cap_state_change(chan, BT_CONNECTED); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1545 | } else |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 1546 | l2cap_do_start(chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1547 | } |
| 1548 | |
Ville Tervo | 30e7627 | 2011-02-22 16:10:53 -0300 | [diff] [blame] | 1549 | err = 0; |
| 1550 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1551 | done: |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1552 | l2cap_chan_unlock(chan); |
Gustavo F. Padovan | 09fd0de | 2011-06-17 13:03:21 -0300 | [diff] [blame] | 1553 | hci_dev_unlock(hdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1554 | hci_dev_put(hdev); |
| 1555 | return err; |
| 1556 | } |
| 1557 | |
Gustavo F. Padovan | dcba0db | 2011-02-04 03:08:36 -0200 | [diff] [blame] | 1558 | int __l2cap_wait_ack(struct sock *sk) |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1559 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1560 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1561 | DECLARE_WAITQUEUE(wait, current); |
| 1562 | int err = 0; |
| 1563 | int timeo = HZ/5; |
| 1564 | |
Marcel Holtmann | 2b0b05d | 2010-05-10 11:33:10 +0200 | [diff] [blame] | 1565 | add_wait_queue(sk_sleep(sk), &wait); |
Peter Hurley | a71a0cf | 2011-07-25 18:36:26 -0400 | [diff] [blame] | 1566 | set_current_state(TASK_INTERRUPTIBLE); |
| 1567 | while (chan->unacked_frames > 0 && chan->conn) { |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1568 | if (!timeo) |
| 1569 | timeo = HZ/5; |
| 1570 | |
| 1571 | if (signal_pending(current)) { |
| 1572 | err = sock_intr_errno(timeo); |
| 1573 | break; |
| 1574 | } |
| 1575 | |
| 1576 | release_sock(sk); |
| 1577 | timeo = schedule_timeout(timeo); |
| 1578 | lock_sock(sk); |
Peter Hurley | a71a0cf | 2011-07-25 18:36:26 -0400 | [diff] [blame] | 1579 | set_current_state(TASK_INTERRUPTIBLE); |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1580 | |
| 1581 | err = sock_error(sk); |
| 1582 | if (err) |
| 1583 | break; |
| 1584 | } |
| 1585 | set_current_state(TASK_RUNNING); |
Marcel Holtmann | 2b0b05d | 2010-05-10 11:33:10 +0200 | [diff] [blame] | 1586 | remove_wait_queue(sk_sleep(sk), &wait); |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1587 | return err; |
| 1588 | } |
| 1589 | |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 1590 | static void l2cap_monitor_timeout(struct work_struct *work) |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1591 | { |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 1592 | struct l2cap_chan *chan = container_of(work, struct l2cap_chan, |
Mat Martineau | 4239d16 | 2012-05-17 20:53:49 -0700 | [diff] [blame] | 1593 | monitor_timer.work); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1594 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1595 | BT_DBG("chan %p", chan); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 1596 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1597 | l2cap_chan_lock(chan); |
| 1598 | |
Mat Martineau | 80909e0 | 2012-05-17 20:53:50 -0700 | [diff] [blame] | 1599 | if (!chan->conn) { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1600 | l2cap_chan_unlock(chan); |
Andrei Emeltchenko | 8d7e1c7 | 2012-03-23 09:42:15 +0200 | [diff] [blame] | 1601 | l2cap_chan_put(chan); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1602 | return; |
| 1603 | } |
| 1604 | |
Andrei Emeltchenko | 401bb1f | 2012-05-21 15:47:46 +0300 | [diff] [blame] | 1605 | l2cap_tx(chan, NULL, NULL, L2CAP_EV_MONITOR_TO); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1606 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1607 | l2cap_chan_unlock(chan); |
Andrei Emeltchenko | 8d7e1c7 | 2012-03-23 09:42:15 +0200 | [diff] [blame] | 1608 | l2cap_chan_put(chan); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1609 | } |
| 1610 | |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 1611 | static void l2cap_retrans_timeout(struct work_struct *work) |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1612 | { |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 1613 | struct l2cap_chan *chan = container_of(work, struct l2cap_chan, |
Mat Martineau | 4239d16 | 2012-05-17 20:53:49 -0700 | [diff] [blame] | 1614 | retrans_timer.work); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1615 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 1616 | BT_DBG("chan %p", chan); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 1617 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1618 | l2cap_chan_lock(chan); |
| 1619 | |
Mat Martineau | 80909e0 | 2012-05-17 20:53:50 -0700 | [diff] [blame] | 1620 | if (!chan->conn) { |
| 1621 | l2cap_chan_unlock(chan); |
| 1622 | l2cap_chan_put(chan); |
| 1623 | return; |
| 1624 | } |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1625 | |
Andrei Emeltchenko | 401bb1f | 2012-05-21 15:47:46 +0300 | [diff] [blame] | 1626 | l2cap_tx(chan, NULL, NULL, L2CAP_EV_RETRANS_TO); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 1627 | l2cap_chan_unlock(chan); |
Andrei Emeltchenko | 8d7e1c7 | 2012-03-23 09:42:15 +0200 | [diff] [blame] | 1628 | l2cap_chan_put(chan); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1629 | } |
| 1630 | |
Gustavo Padovan | d660366 | 2012-05-21 13:58:22 -0300 | [diff] [blame] | 1631 | static void l2cap_streaming_send(struct l2cap_chan *chan, |
| 1632 | struct sk_buff_head *skbs) |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1633 | { |
Gustavo F. Padovan | ccbb84a | 2010-08-30 18:44:44 -0300 | [diff] [blame] | 1634 | struct sk_buff *skb; |
Mat Martineau | 3733937 | 2012-05-17 20:53:33 -0700 | [diff] [blame] | 1635 | struct l2cap_ctrl *control; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1636 | |
Mat Martineau | 3733937 | 2012-05-17 20:53:33 -0700 | [diff] [blame] | 1637 | BT_DBG("chan %p, skbs %p", chan, skbs); |
| 1638 | |
Mat Martineau | 3733937 | 2012-05-17 20:53:33 -0700 | [diff] [blame] | 1639 | skb_queue_splice_tail_init(skbs, &chan->tx_q); |
| 1640 | |
| 1641 | while (!skb_queue_empty(&chan->tx_q)) { |
| 1642 | |
| 1643 | skb = skb_dequeue(&chan->tx_q); |
| 1644 | |
| 1645 | bt_cb(skb)->control.retries = 1; |
| 1646 | control = &bt_cb(skb)->control; |
| 1647 | |
| 1648 | control->reqseq = 0; |
| 1649 | control->txseq = chan->next_tx_seq; |
| 1650 | |
| 1651 | __pack_control(chan, control, skb); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1652 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1653 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Mat Martineau | 3733937 | 2012-05-17 20:53:33 -0700 | [diff] [blame] | 1654 | u16 fcs = crc16(0, (u8 *) skb->data, skb->len); |
| 1655 | put_unaligned_le16(fcs, skb_put(skb, L2CAP_FCS_SIZE)); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1656 | } |
| 1657 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1658 | l2cap_do_send(chan, skb); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1659 | |
Andrei Emeltchenko | b440067 | 2012-07-10 15:27:49 +0300 | [diff] [blame^] | 1660 | BT_DBG("Sent txseq %u", control->txseq); |
Mat Martineau | 3733937 | 2012-05-17 20:53:33 -0700 | [diff] [blame] | 1661 | |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 1662 | chan->next_tx_seq = __next_seq(chan, chan->next_tx_seq); |
Mat Martineau | 3733937 | 2012-05-17 20:53:33 -0700 | [diff] [blame] | 1663 | chan->frames_sent++; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1664 | } |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1665 | } |
| 1666 | |
Szymon Janc | 67c9e84 | 2011-07-28 16:24:33 +0200 | [diff] [blame] | 1667 | static int l2cap_ertm_send(struct l2cap_chan *chan) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1668 | { |
| 1669 | struct sk_buff *skb, *tx_skb; |
Mat Martineau | 18a48e7 | 2012-05-17 20:53:34 -0700 | [diff] [blame] | 1670 | struct l2cap_ctrl *control; |
| 1671 | int sent = 0; |
| 1672 | |
| 1673 | BT_DBG("chan %p", chan); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1674 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1675 | if (chan->state != BT_CONNECTED) |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 1676 | return -ENOTCONN; |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1677 | |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 1678 | if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state)) |
| 1679 | return 0; |
| 1680 | |
Mat Martineau | 18a48e7 | 2012-05-17 20:53:34 -0700 | [diff] [blame] | 1681 | while (chan->tx_send_head && |
| 1682 | chan->unacked_frames < chan->remote_tx_win && |
| 1683 | chan->tx_state == L2CAP_TX_STATE_XMIT) { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1684 | |
Mat Martineau | 18a48e7 | 2012-05-17 20:53:34 -0700 | [diff] [blame] | 1685 | skb = chan->tx_send_head; |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1686 | |
Mat Martineau | 18a48e7 | 2012-05-17 20:53:34 -0700 | [diff] [blame] | 1687 | bt_cb(skb)->control.retries = 1; |
| 1688 | control = &bt_cb(skb)->control; |
Gustavo F. Padovan | 95ffa97 | 2010-06-18 20:37:33 -0300 | [diff] [blame] | 1689 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1690 | if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state)) |
Mat Martineau | 18a48e7 | 2012-05-17 20:53:34 -0700 | [diff] [blame] | 1691 | control->final = 1; |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1692 | |
Mat Martineau | 18a48e7 | 2012-05-17 20:53:34 -0700 | [diff] [blame] | 1693 | control->reqseq = chan->buffer_seq; |
| 1694 | chan->last_acked_seq = chan->buffer_seq; |
| 1695 | control->txseq = chan->next_tx_seq; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1696 | |
Mat Martineau | 18a48e7 | 2012-05-17 20:53:34 -0700 | [diff] [blame] | 1697 | __pack_control(chan, control, skb); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1698 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1699 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Mat Martineau | 18a48e7 | 2012-05-17 20:53:34 -0700 | [diff] [blame] | 1700 | u16 fcs = crc16(0, (u8 *) skb->data, skb->len); |
| 1701 | put_unaligned_le16(fcs, skb_put(skb, L2CAP_FCS_SIZE)); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1702 | } |
| 1703 | |
Mat Martineau | 18a48e7 | 2012-05-17 20:53:34 -0700 | [diff] [blame] | 1704 | /* Clone after data has been modified. Data is assumed to be |
| 1705 | read-only (for locking purposes) on cloned sk_buffs. |
| 1706 | */ |
| 1707 | tx_skb = skb_clone(skb, GFP_KERNEL); |
| 1708 | |
| 1709 | if (!tx_skb) |
| 1710 | break; |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1711 | |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 1712 | __set_retrans_timer(chan); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1713 | |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 1714 | chan->next_tx_seq = __next_seq(chan, chan->next_tx_seq); |
Mat Martineau | 18a48e7 | 2012-05-17 20:53:34 -0700 | [diff] [blame] | 1715 | chan->unacked_frames++; |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1716 | chan->frames_sent++; |
Mat Martineau | 18a48e7 | 2012-05-17 20:53:34 -0700 | [diff] [blame] | 1717 | sent++; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1718 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1719 | if (skb_queue_is_last(&chan->tx_q, skb)) |
| 1720 | chan->tx_send_head = NULL; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1721 | else |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1722 | chan->tx_send_head = skb_queue_next(&chan->tx_q, skb); |
Mat Martineau | 18a48e7 | 2012-05-17 20:53:34 -0700 | [diff] [blame] | 1723 | |
| 1724 | l2cap_do_send(chan, tx_skb); |
Andrei Emeltchenko | b440067 | 2012-07-10 15:27:49 +0300 | [diff] [blame^] | 1725 | BT_DBG("Sent txseq %u", control->txseq); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1726 | } |
| 1727 | |
Andrei Emeltchenko | b440067 | 2012-07-10 15:27:49 +0300 | [diff] [blame^] | 1728 | BT_DBG("Sent %d, %u unacked, %u in ERTM queue", sent, |
| 1729 | chan->unacked_frames, skb_queue_len(&chan->tx_q)); |
Mat Martineau | 18a48e7 | 2012-05-17 20:53:34 -0700 | [diff] [blame] | 1730 | |
| 1731 | return sent; |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1732 | } |
| 1733 | |
Mat Martineau | e1fbd4c | 2012-05-17 20:53:43 -0700 | [diff] [blame] | 1734 | static void l2cap_ertm_resend(struct l2cap_chan *chan) |
| 1735 | { |
| 1736 | struct l2cap_ctrl control; |
| 1737 | struct sk_buff *skb; |
| 1738 | struct sk_buff *tx_skb; |
| 1739 | u16 seq; |
| 1740 | |
| 1741 | BT_DBG("chan %p", chan); |
| 1742 | |
| 1743 | if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state)) |
| 1744 | return; |
| 1745 | |
| 1746 | while (chan->retrans_list.head != L2CAP_SEQ_LIST_CLEAR) { |
| 1747 | seq = l2cap_seq_list_pop(&chan->retrans_list); |
| 1748 | |
| 1749 | skb = l2cap_ertm_seq_in_queue(&chan->tx_q, seq); |
| 1750 | if (!skb) { |
| 1751 | BT_DBG("Error: Can't retransmit seq %d, frame missing", |
| 1752 | seq); |
| 1753 | continue; |
| 1754 | } |
| 1755 | |
| 1756 | bt_cb(skb)->control.retries++; |
| 1757 | control = bt_cb(skb)->control; |
| 1758 | |
| 1759 | if (chan->max_tx != 0 && |
| 1760 | bt_cb(skb)->control.retries > chan->max_tx) { |
| 1761 | BT_DBG("Retry limit exceeded (%d)", chan->max_tx); |
| 1762 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
| 1763 | l2cap_seq_list_clear(&chan->retrans_list); |
| 1764 | break; |
| 1765 | } |
| 1766 | |
| 1767 | control.reqseq = chan->buffer_seq; |
| 1768 | if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state)) |
| 1769 | control.final = 1; |
| 1770 | else |
| 1771 | control.final = 0; |
| 1772 | |
| 1773 | if (skb_cloned(skb)) { |
| 1774 | /* Cloned sk_buffs are read-only, so we need a |
| 1775 | * writeable copy |
| 1776 | */ |
| 1777 | tx_skb = skb_copy(skb, GFP_ATOMIC); |
| 1778 | } else { |
| 1779 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
| 1780 | } |
| 1781 | |
| 1782 | if (!tx_skb) { |
| 1783 | l2cap_seq_list_clear(&chan->retrans_list); |
| 1784 | break; |
| 1785 | } |
| 1786 | |
| 1787 | /* Update skb contents */ |
| 1788 | if (test_bit(FLAG_EXT_CTRL, &chan->flags)) { |
| 1789 | put_unaligned_le32(__pack_extended_control(&control), |
| 1790 | tx_skb->data + L2CAP_HDR_SIZE); |
| 1791 | } else { |
| 1792 | put_unaligned_le16(__pack_enhanced_control(&control), |
| 1793 | tx_skb->data + L2CAP_HDR_SIZE); |
| 1794 | } |
| 1795 | |
| 1796 | if (chan->fcs == L2CAP_FCS_CRC16) { |
| 1797 | u16 fcs = crc16(0, (u8 *) tx_skb->data, tx_skb->len); |
| 1798 | put_unaligned_le16(fcs, skb_put(tx_skb, |
| 1799 | L2CAP_FCS_SIZE)); |
| 1800 | } |
| 1801 | |
| 1802 | l2cap_do_send(chan, tx_skb); |
| 1803 | |
| 1804 | BT_DBG("Resent txseq %d", control.txseq); |
| 1805 | |
| 1806 | chan->last_acked_seq = chan->buffer_seq; |
| 1807 | } |
| 1808 | } |
| 1809 | |
Mat Martineau | f80842a | 2012-05-17 20:53:46 -0700 | [diff] [blame] | 1810 | static void l2cap_retransmit(struct l2cap_chan *chan, |
| 1811 | struct l2cap_ctrl *control) |
| 1812 | { |
| 1813 | BT_DBG("chan %p, control %p", chan, control); |
| 1814 | |
| 1815 | l2cap_seq_list_append(&chan->retrans_list, control->reqseq); |
| 1816 | l2cap_ertm_resend(chan); |
| 1817 | } |
| 1818 | |
Mat Martineau | d2a7ac5 | 2012-05-17 20:53:42 -0700 | [diff] [blame] | 1819 | static void l2cap_retransmit_all(struct l2cap_chan *chan, |
| 1820 | struct l2cap_ctrl *control) |
| 1821 | { |
Mat Martineau | e1fbd4c | 2012-05-17 20:53:43 -0700 | [diff] [blame] | 1822 | struct sk_buff *skb; |
| 1823 | |
| 1824 | BT_DBG("chan %p, control %p", chan, control); |
| 1825 | |
| 1826 | if (control->poll) |
| 1827 | set_bit(CONN_SEND_FBIT, &chan->conn_state); |
| 1828 | |
| 1829 | l2cap_seq_list_clear(&chan->retrans_list); |
| 1830 | |
| 1831 | if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state)) |
| 1832 | return; |
| 1833 | |
| 1834 | if (chan->unacked_frames) { |
| 1835 | skb_queue_walk(&chan->tx_q, skb) { |
| 1836 | if (bt_cb(skb)->control.txseq == control->reqseq || |
| 1837 | skb == chan->tx_send_head) |
| 1838 | break; |
| 1839 | } |
| 1840 | |
| 1841 | skb_queue_walk_from(&chan->tx_q, skb) { |
| 1842 | if (skb == chan->tx_send_head) |
| 1843 | break; |
| 1844 | |
| 1845 | l2cap_seq_list_append(&chan->retrans_list, |
| 1846 | bt_cb(skb)->control.txseq); |
| 1847 | } |
| 1848 | |
| 1849 | l2cap_ertm_resend(chan); |
| 1850 | } |
Mat Martineau | d2a7ac5 | 2012-05-17 20:53:42 -0700 | [diff] [blame] | 1851 | } |
| 1852 | |
Szymon Janc | b17e73b | 2012-01-11 10:59:47 +0100 | [diff] [blame] | 1853 | static void l2cap_send_ack(struct l2cap_chan *chan) |
| 1854 | { |
Mat Martineau | 0a0aba4 | 2012-05-17 20:53:39 -0700 | [diff] [blame] | 1855 | struct l2cap_ctrl control; |
| 1856 | u16 frames_to_ack = __seq_offset(chan, chan->buffer_seq, |
| 1857 | chan->last_acked_seq); |
| 1858 | int threshold; |
| 1859 | |
| 1860 | BT_DBG("chan %p last_acked_seq %d buffer_seq %d", |
| 1861 | chan, chan->last_acked_seq, chan->buffer_seq); |
| 1862 | |
| 1863 | memset(&control, 0, sizeof(control)); |
| 1864 | control.sframe = 1; |
| 1865 | |
| 1866 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state) && |
| 1867 | chan->rx_state == L2CAP_RX_STATE_RECV) { |
| 1868 | __clear_ack_timer(chan); |
| 1869 | control.super = L2CAP_SUPER_RNR; |
| 1870 | control.reqseq = chan->buffer_seq; |
| 1871 | l2cap_send_sframe(chan, &control); |
| 1872 | } else { |
| 1873 | if (!test_bit(CONN_REMOTE_BUSY, &chan->conn_state)) { |
| 1874 | l2cap_ertm_send(chan); |
| 1875 | /* If any i-frames were sent, they included an ack */ |
| 1876 | if (chan->buffer_seq == chan->last_acked_seq) |
| 1877 | frames_to_ack = 0; |
| 1878 | } |
| 1879 | |
| 1880 | /* Ack now if the tx window is 3/4ths full. |
| 1881 | * Calculate without mul or div |
| 1882 | */ |
| 1883 | threshold = chan->tx_win; |
| 1884 | threshold += threshold << 1; |
| 1885 | threshold >>= 2; |
| 1886 | |
Andrei Emeltchenko | b440067 | 2012-07-10 15:27:49 +0300 | [diff] [blame^] | 1887 | BT_DBG("frames_to_ack %u, threshold %d", frames_to_ack, |
Mat Martineau | 0a0aba4 | 2012-05-17 20:53:39 -0700 | [diff] [blame] | 1888 | threshold); |
| 1889 | |
| 1890 | if (frames_to_ack >= threshold) { |
| 1891 | __clear_ack_timer(chan); |
| 1892 | control.super = L2CAP_SUPER_RR; |
| 1893 | control.reqseq = chan->buffer_seq; |
| 1894 | l2cap_send_sframe(chan, &control); |
| 1895 | frames_to_ack = 0; |
| 1896 | } |
| 1897 | |
| 1898 | if (frames_to_ack) |
| 1899 | __set_ack_timer(chan); |
| 1900 | } |
Szymon Janc | b17e73b | 2012-01-11 10:59:47 +0100 | [diff] [blame] | 1901 | } |
| 1902 | |
Gustavo F. Padovan | 0412468 | 2012-03-08 01:25:00 -0300 | [diff] [blame] | 1903 | static inline int l2cap_skbuff_fromiovec(struct l2cap_chan *chan, |
| 1904 | struct msghdr *msg, int len, |
| 1905 | int count, struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1906 | { |
Andrei Emeltchenko | 0952a57 | 2012-01-13 17:21:43 +0200 | [diff] [blame] | 1907 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1908 | struct sk_buff **frag; |
Gustavo Padovan | 9033894 | 2012-04-06 20:15:47 -0300 | [diff] [blame] | 1909 | int sent = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1910 | |
Gustavo F. Padovan | 59203a2 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1911 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1912 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1913 | |
| 1914 | sent += count; |
| 1915 | len -= count; |
| 1916 | |
| 1917 | /* Continuation fragments (no L2CAP header) */ |
| 1918 | frag = &skb_shinfo(skb)->frag_list; |
| 1919 | while (len) { |
Gustavo Padovan | fbe0070 | 2012-05-15 13:22:55 -0300 | [diff] [blame] | 1920 | struct sk_buff *tmp; |
| 1921 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1922 | count = min_t(unsigned int, conn->mtu, len); |
| 1923 | |
Gustavo Padovan | fbe0070 | 2012-05-15 13:22:55 -0300 | [diff] [blame] | 1924 | tmp = chan->ops->alloc_skb(chan, count, |
| 1925 | msg->msg_flags & MSG_DONTWAIT); |
| 1926 | if (IS_ERR(tmp)) |
| 1927 | return PTR_ERR(tmp); |
Andrei Emeltchenko | 2f7719c | 2012-01-20 14:08:03 +0200 | [diff] [blame] | 1928 | |
Gustavo Padovan | fbe0070 | 2012-05-15 13:22:55 -0300 | [diff] [blame] | 1929 | *frag = tmp; |
| 1930 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1931 | if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) |
| 1932 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1933 | |
Luiz Augusto von Dentz | 5e59b79 | 2011-11-01 10:58:57 +0200 | [diff] [blame] | 1934 | (*frag)->priority = skb->priority; |
| 1935 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1936 | sent += count; |
| 1937 | len -= count; |
| 1938 | |
Gustavo Padovan | 2d0ed3d | 2012-05-11 13:16:12 -0300 | [diff] [blame] | 1939 | skb->len += (*frag)->len; |
| 1940 | skb->data_len += (*frag)->len; |
| 1941 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1942 | frag = &(*frag)->next; |
| 1943 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1944 | |
| 1945 | return sent; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1946 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1947 | |
Luiz Augusto von Dentz | 5e59b79 | 2011-11-01 10:58:57 +0200 | [diff] [blame] | 1948 | static struct sk_buff *l2cap_create_connless_pdu(struct l2cap_chan *chan, |
Andrei Emeltchenko | b440067 | 2012-07-10 15:27:49 +0300 | [diff] [blame^] | 1949 | struct msghdr *msg, size_t len, |
| 1950 | u32 priority) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1951 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1952 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1953 | struct sk_buff *skb; |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 1954 | int err, count, hlen = L2CAP_HDR_SIZE + L2CAP_PSMLEN_SIZE; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1955 | struct l2cap_hdr *lh; |
| 1956 | |
Andrei Emeltchenko | b440067 | 2012-07-10 15:27:49 +0300 | [diff] [blame^] | 1957 | BT_DBG("chan %p len %zu priority %u", chan, len, priority); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1958 | |
| 1959 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
Andrei Emeltchenko | 2f7719c | 2012-01-20 14:08:03 +0200 | [diff] [blame] | 1960 | |
| 1961 | skb = chan->ops->alloc_skb(chan, count + hlen, |
Gustavo Padovan | 9033894 | 2012-04-06 20:15:47 -0300 | [diff] [blame] | 1962 | msg->msg_flags & MSG_DONTWAIT); |
| 1963 | if (IS_ERR(skb)) |
| 1964 | return skb; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1965 | |
Luiz Augusto von Dentz | 5e59b79 | 2011-11-01 10:58:57 +0200 | [diff] [blame] | 1966 | skb->priority = priority; |
| 1967 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1968 | /* Create L2CAP header */ |
| 1969 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1970 | lh->cid = cpu_to_le16(chan->dcid); |
Andrei Emeltchenko | daf6a78c | 2012-05-03 10:55:52 +0300 | [diff] [blame] | 1971 | lh->len = cpu_to_le16(len + L2CAP_PSMLEN_SIZE); |
| 1972 | put_unaligned(chan->psm, skb_put(skb, L2CAP_PSMLEN_SIZE)); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1973 | |
Andrei Emeltchenko | 0952a57 | 2012-01-13 17:21:43 +0200 | [diff] [blame] | 1974 | err = l2cap_skbuff_fromiovec(chan, msg, len, count, skb); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1975 | if (unlikely(err < 0)) { |
| 1976 | kfree_skb(skb); |
| 1977 | return ERR_PTR(err); |
| 1978 | } |
| 1979 | return skb; |
| 1980 | } |
| 1981 | |
Luiz Augusto von Dentz | 5e59b79 | 2011-11-01 10:58:57 +0200 | [diff] [blame] | 1982 | static struct sk_buff *l2cap_create_basic_pdu(struct l2cap_chan *chan, |
Andrei Emeltchenko | b440067 | 2012-07-10 15:27:49 +0300 | [diff] [blame^] | 1983 | struct msghdr *msg, size_t len, |
| 1984 | u32 priority) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1985 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1986 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1987 | struct sk_buff *skb; |
Gustavo Padovan | f2ba7fa | 2012-05-03 04:54:21 -0300 | [diff] [blame] | 1988 | int err, count; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1989 | struct l2cap_hdr *lh; |
| 1990 | |
Andrei Emeltchenko | b440067 | 2012-07-10 15:27:49 +0300 | [diff] [blame^] | 1991 | BT_DBG("chan %p len %zu", chan, len); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1992 | |
Gustavo Padovan | f2ba7fa | 2012-05-03 04:54:21 -0300 | [diff] [blame] | 1993 | count = min_t(unsigned int, (conn->mtu - L2CAP_HDR_SIZE), len); |
Andrei Emeltchenko | 2f7719c | 2012-01-20 14:08:03 +0200 | [diff] [blame] | 1994 | |
Gustavo Padovan | f2ba7fa | 2012-05-03 04:54:21 -0300 | [diff] [blame] | 1995 | skb = chan->ops->alloc_skb(chan, count + L2CAP_HDR_SIZE, |
Gustavo Padovan | 9033894 | 2012-04-06 20:15:47 -0300 | [diff] [blame] | 1996 | msg->msg_flags & MSG_DONTWAIT); |
| 1997 | if (IS_ERR(skb)) |
| 1998 | return skb; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1999 | |
Luiz Augusto von Dentz | 5e59b79 | 2011-11-01 10:58:57 +0200 | [diff] [blame] | 2000 | skb->priority = priority; |
| 2001 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 2002 | /* Create L2CAP header */ |
| 2003 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2004 | lh->cid = cpu_to_le16(chan->dcid); |
Gustavo Padovan | 6ff9b5e | 2012-05-02 11:56:17 -0300 | [diff] [blame] | 2005 | lh->len = cpu_to_le16(len); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 2006 | |
Andrei Emeltchenko | 0952a57 | 2012-01-13 17:21:43 +0200 | [diff] [blame] | 2007 | err = l2cap_skbuff_fromiovec(chan, msg, len, count, skb); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 2008 | if (unlikely(err < 0)) { |
| 2009 | kfree_skb(skb); |
| 2010 | return ERR_PTR(err); |
| 2011 | } |
| 2012 | return skb; |
| 2013 | } |
| 2014 | |
Luiz Augusto von Dentz | ab0ff76 | 2011-09-12 20:00:50 +0300 | [diff] [blame] | 2015 | static struct sk_buff *l2cap_create_iframe_pdu(struct l2cap_chan *chan, |
Andrei Emeltchenko | b440067 | 2012-07-10 15:27:49 +0300 | [diff] [blame^] | 2016 | struct msghdr *msg, size_t len, |
| 2017 | u16 sdulen) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 2018 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2019 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 2020 | struct sk_buff *skb; |
Andrei Emeltchenko | e4ca6d9 | 2011-10-11 13:37:52 +0300 | [diff] [blame] | 2021 | int err, count, hlen; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 2022 | struct l2cap_hdr *lh; |
| 2023 | |
Andrei Emeltchenko | b440067 | 2012-07-10 15:27:49 +0300 | [diff] [blame^] | 2024 | BT_DBG("chan %p len %zu", chan, len); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 2025 | |
Gustavo F. Padovan | 0ee0d20 | 2010-05-01 16:15:41 -0300 | [diff] [blame] | 2026 | if (!conn) |
| 2027 | return ERR_PTR(-ENOTCONN); |
| 2028 | |
Gustavo Padovan | ba7aa64 | 2012-05-29 13:29:16 -0300 | [diff] [blame] | 2029 | hlen = __ertm_hdr_size(chan); |
Andrei Emeltchenko | e4ca6d9 | 2011-10-11 13:37:52 +0300 | [diff] [blame] | 2030 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2031 | if (sdulen) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 2032 | hlen += L2CAP_SDULEN_SIZE; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2033 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2034 | if (chan->fcs == L2CAP_FCS_CRC16) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 2035 | hlen += L2CAP_FCS_SIZE; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2036 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 2037 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
Andrei Emeltchenko | 2f7719c | 2012-01-20 14:08:03 +0200 | [diff] [blame] | 2038 | |
| 2039 | skb = chan->ops->alloc_skb(chan, count + hlen, |
Gustavo Padovan | 9033894 | 2012-04-06 20:15:47 -0300 | [diff] [blame] | 2040 | msg->msg_flags & MSG_DONTWAIT); |
| 2041 | if (IS_ERR(skb)) |
| 2042 | return skb; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 2043 | |
| 2044 | /* Create L2CAP header */ |
| 2045 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2046 | lh->cid = cpu_to_le16(chan->dcid); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 2047 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 2048 | |
Mat Martineau | 18a48e7 | 2012-05-17 20:53:34 -0700 | [diff] [blame] | 2049 | /* Control header is populated later */ |
| 2050 | if (test_bit(FLAG_EXT_CTRL, &chan->flags)) |
| 2051 | put_unaligned_le32(0, skb_put(skb, L2CAP_EXT_CTRL_SIZE)); |
| 2052 | else |
| 2053 | put_unaligned_le16(0, skb_put(skb, L2CAP_ENH_CTRL_SIZE)); |
Andrei Emeltchenko | 88843ab | 2011-10-17 12:19:56 +0300 | [diff] [blame] | 2054 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2055 | if (sdulen) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 2056 | put_unaligned_le16(sdulen, skb_put(skb, L2CAP_SDULEN_SIZE)); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 2057 | |
Andrei Emeltchenko | 0952a57 | 2012-01-13 17:21:43 +0200 | [diff] [blame] | 2058 | err = l2cap_skbuff_fromiovec(chan, msg, len, count, skb); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 2059 | if (unlikely(err < 0)) { |
| 2060 | kfree_skb(skb); |
| 2061 | return ERR_PTR(err); |
| 2062 | } |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 2063 | |
Mat Martineau | 18a48e7 | 2012-05-17 20:53:34 -0700 | [diff] [blame] | 2064 | bt_cb(skb)->control.fcs = chan->fcs; |
Mat Martineau | 3ce3514 | 2012-04-25 16:36:14 -0700 | [diff] [blame] | 2065 | bt_cb(skb)->control.retries = 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 2066 | return skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2067 | } |
| 2068 | |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 2069 | static int l2cap_segment_sdu(struct l2cap_chan *chan, |
| 2070 | struct sk_buff_head *seg_queue, |
| 2071 | struct msghdr *msg, size_t len) |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2072 | { |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2073 | struct sk_buff *skb; |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 2074 | u16 sdu_len; |
| 2075 | size_t pdu_len; |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 2076 | u8 sar; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2077 | |
Andrei Emeltchenko | b440067 | 2012-07-10 15:27:49 +0300 | [diff] [blame^] | 2078 | BT_DBG("chan %p, msg %p, len %zu", chan, msg, len); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2079 | |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 2080 | /* It is critical that ERTM PDUs fit in a single HCI fragment, |
| 2081 | * so fragmented skbs are not used. The HCI layer's handling |
| 2082 | * of fragmented skbs is not compatible with ERTM's queueing. |
| 2083 | */ |
| 2084 | |
| 2085 | /* PDU size is derived from the HCI MTU */ |
| 2086 | pdu_len = chan->conn->mtu; |
| 2087 | |
| 2088 | pdu_len = min_t(size_t, pdu_len, L2CAP_BREDR_MAX_PAYLOAD); |
| 2089 | |
| 2090 | /* Adjust for largest possible L2CAP overhead. */ |
Gustavo Padovan | 35d401d | 2012-05-25 18:57:05 -0300 | [diff] [blame] | 2091 | if (chan->fcs) |
| 2092 | pdu_len -= L2CAP_FCS_SIZE; |
| 2093 | |
Gustavo Padovan | ba7aa64 | 2012-05-29 13:29:16 -0300 | [diff] [blame] | 2094 | pdu_len -= __ertm_hdr_size(chan); |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 2095 | |
| 2096 | /* Remote device may have requested smaller PDUs */ |
| 2097 | pdu_len = min_t(size_t, pdu_len, chan->remote_mps); |
| 2098 | |
| 2099 | if (len <= pdu_len) { |
| 2100 | sar = L2CAP_SAR_UNSEGMENTED; |
| 2101 | sdu_len = 0; |
| 2102 | pdu_len = len; |
| 2103 | } else { |
| 2104 | sar = L2CAP_SAR_START; |
| 2105 | sdu_len = len; |
| 2106 | pdu_len -= L2CAP_SDULEN_SIZE; |
| 2107 | } |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2108 | |
| 2109 | while (len > 0) { |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 2110 | skb = l2cap_create_iframe_pdu(chan, msg, pdu_len, sdu_len); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2111 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2112 | if (IS_ERR(skb)) { |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 2113 | __skb_queue_purge(seg_queue); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2114 | return PTR_ERR(skb); |
| 2115 | } |
| 2116 | |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 2117 | bt_cb(skb)->control.sar = sar; |
| 2118 | __skb_queue_tail(seg_queue, skb); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2119 | |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 2120 | len -= pdu_len; |
| 2121 | if (sdu_len) { |
| 2122 | sdu_len = 0; |
| 2123 | pdu_len += L2CAP_SDULEN_SIZE; |
| 2124 | } |
| 2125 | |
| 2126 | if (len <= pdu_len) { |
| 2127 | sar = L2CAP_SAR_END; |
| 2128 | pdu_len = len; |
| 2129 | } else { |
| 2130 | sar = L2CAP_SAR_CONTINUE; |
| 2131 | } |
| 2132 | } |
| 2133 | |
Gustavo Padovan | f0f6279 | 2012-05-29 13:29:17 -0300 | [diff] [blame] | 2134 | return 0; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2135 | } |
| 2136 | |
Luiz Augusto von Dentz | 5e59b79 | 2011-11-01 10:58:57 +0200 | [diff] [blame] | 2137 | int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len, |
| 2138 | u32 priority) |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 2139 | { |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 2140 | struct sk_buff *skb; |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 2141 | int err; |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 2142 | struct sk_buff_head seg_queue; |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 2143 | |
| 2144 | /* Connectionless channel */ |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 2145 | if (chan->chan_type == L2CAP_CHAN_CONN_LESS) { |
Luiz Augusto von Dentz | 5e59b79 | 2011-11-01 10:58:57 +0200 | [diff] [blame] | 2146 | skb = l2cap_create_connless_pdu(chan, msg, len, priority); |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 2147 | if (IS_ERR(skb)) |
| 2148 | return PTR_ERR(skb); |
| 2149 | |
| 2150 | l2cap_do_send(chan, skb); |
| 2151 | return len; |
| 2152 | } |
| 2153 | |
| 2154 | switch (chan->mode) { |
| 2155 | case L2CAP_MODE_BASIC: |
| 2156 | /* Check outgoing MTU */ |
| 2157 | if (len > chan->omtu) |
| 2158 | return -EMSGSIZE; |
| 2159 | |
| 2160 | /* Create a basic PDU */ |
Luiz Augusto von Dentz | 5e59b79 | 2011-11-01 10:58:57 +0200 | [diff] [blame] | 2161 | skb = l2cap_create_basic_pdu(chan, msg, len, priority); |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 2162 | if (IS_ERR(skb)) |
| 2163 | return PTR_ERR(skb); |
| 2164 | |
| 2165 | l2cap_do_send(chan, skb); |
| 2166 | err = len; |
| 2167 | break; |
| 2168 | |
| 2169 | case L2CAP_MODE_ERTM: |
| 2170 | case L2CAP_MODE_STREAMING: |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 2171 | /* Check outgoing MTU */ |
| 2172 | if (len > chan->omtu) { |
| 2173 | err = -EMSGSIZE; |
| 2174 | break; |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 2175 | } |
| 2176 | |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 2177 | __skb_queue_head_init(&seg_queue); |
| 2178 | |
| 2179 | /* Do segmentation before calling in to the state machine, |
| 2180 | * since it's possible to block while waiting for memory |
| 2181 | * allocation. |
| 2182 | */ |
| 2183 | err = l2cap_segment_sdu(chan, &seg_queue, msg, len); |
| 2184 | |
| 2185 | /* The channel could have been closed while segmenting, |
| 2186 | * check that it is still connected. |
| 2187 | */ |
| 2188 | if (chan->state != BT_CONNECTED) { |
| 2189 | __skb_queue_purge(&seg_queue); |
| 2190 | err = -ENOTCONN; |
| 2191 | } |
| 2192 | |
| 2193 | if (err) |
| 2194 | break; |
| 2195 | |
Mat Martineau | 3733937 | 2012-05-17 20:53:33 -0700 | [diff] [blame] | 2196 | if (chan->mode == L2CAP_MODE_ERTM) |
Gustavo Padovan | d660366 | 2012-05-21 13:58:22 -0300 | [diff] [blame] | 2197 | l2cap_tx(chan, NULL, &seg_queue, L2CAP_EV_DATA_REQUEST); |
Mat Martineau | 3733937 | 2012-05-17 20:53:33 -0700 | [diff] [blame] | 2198 | else |
Gustavo Padovan | d660366 | 2012-05-21 13:58:22 -0300 | [diff] [blame] | 2199 | l2cap_streaming_send(chan, &seg_queue); |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 2200 | |
Gustavo Padovan | d660366 | 2012-05-21 13:58:22 -0300 | [diff] [blame] | 2201 | err = len; |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 2202 | |
Mat Martineau | 94122bb | 2012-05-02 09:42:02 -0700 | [diff] [blame] | 2203 | /* If the skbs were not queued for sending, they'll still be in |
| 2204 | * seg_queue and need to be purged. |
| 2205 | */ |
| 2206 | __skb_queue_purge(&seg_queue); |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 2207 | break; |
| 2208 | |
| 2209 | default: |
| 2210 | BT_DBG("bad state %1.1x", chan->mode); |
| 2211 | err = -EBADFD; |
| 2212 | } |
| 2213 | |
| 2214 | return err; |
| 2215 | } |
| 2216 | |
Mat Martineau | d2a7ac5 | 2012-05-17 20:53:42 -0700 | [diff] [blame] | 2217 | static void l2cap_send_srej(struct l2cap_chan *chan, u16 txseq) |
| 2218 | { |
Mat Martineau | bed68bd | 2012-05-17 20:53:44 -0700 | [diff] [blame] | 2219 | struct l2cap_ctrl control; |
| 2220 | u16 seq; |
| 2221 | |
Andrei Emeltchenko | b440067 | 2012-07-10 15:27:49 +0300 | [diff] [blame^] | 2222 | BT_DBG("chan %p, txseq %u", chan, txseq); |
Mat Martineau | bed68bd | 2012-05-17 20:53:44 -0700 | [diff] [blame] | 2223 | |
| 2224 | memset(&control, 0, sizeof(control)); |
| 2225 | control.sframe = 1; |
| 2226 | control.super = L2CAP_SUPER_SREJ; |
| 2227 | |
| 2228 | for (seq = chan->expected_tx_seq; seq != txseq; |
| 2229 | seq = __next_seq(chan, seq)) { |
| 2230 | if (!l2cap_ertm_seq_in_queue(&chan->srej_q, seq)) { |
| 2231 | control.reqseq = seq; |
| 2232 | l2cap_send_sframe(chan, &control); |
| 2233 | l2cap_seq_list_append(&chan->srej_list, seq); |
| 2234 | } |
| 2235 | } |
| 2236 | |
| 2237 | chan->expected_tx_seq = __next_seq(chan, txseq); |
Mat Martineau | d2a7ac5 | 2012-05-17 20:53:42 -0700 | [diff] [blame] | 2238 | } |
| 2239 | |
| 2240 | static void l2cap_send_srej_tail(struct l2cap_chan *chan) |
| 2241 | { |
Mat Martineau | bed68bd | 2012-05-17 20:53:44 -0700 | [diff] [blame] | 2242 | struct l2cap_ctrl control; |
| 2243 | |
| 2244 | BT_DBG("chan %p", chan); |
| 2245 | |
| 2246 | if (chan->srej_list.tail == L2CAP_SEQ_LIST_CLEAR) |
| 2247 | return; |
| 2248 | |
| 2249 | memset(&control, 0, sizeof(control)); |
| 2250 | control.sframe = 1; |
| 2251 | control.super = L2CAP_SUPER_SREJ; |
| 2252 | control.reqseq = chan->srej_list.tail; |
| 2253 | l2cap_send_sframe(chan, &control); |
Mat Martineau | d2a7ac5 | 2012-05-17 20:53:42 -0700 | [diff] [blame] | 2254 | } |
| 2255 | |
| 2256 | static void l2cap_send_srej_list(struct l2cap_chan *chan, u16 txseq) |
| 2257 | { |
Mat Martineau | bed68bd | 2012-05-17 20:53:44 -0700 | [diff] [blame] | 2258 | struct l2cap_ctrl control; |
| 2259 | u16 initial_head; |
| 2260 | u16 seq; |
| 2261 | |
Andrei Emeltchenko | b440067 | 2012-07-10 15:27:49 +0300 | [diff] [blame^] | 2262 | BT_DBG("chan %p, txseq %u", chan, txseq); |
Mat Martineau | bed68bd | 2012-05-17 20:53:44 -0700 | [diff] [blame] | 2263 | |
| 2264 | memset(&control, 0, sizeof(control)); |
| 2265 | control.sframe = 1; |
| 2266 | control.super = L2CAP_SUPER_SREJ; |
| 2267 | |
| 2268 | /* Capture initial list head to allow only one pass through the list. */ |
| 2269 | initial_head = chan->srej_list.head; |
| 2270 | |
| 2271 | do { |
| 2272 | seq = l2cap_seq_list_pop(&chan->srej_list); |
| 2273 | if (seq == txseq || seq == L2CAP_SEQ_LIST_CLEAR) |
| 2274 | break; |
| 2275 | |
| 2276 | control.reqseq = seq; |
| 2277 | l2cap_send_sframe(chan, &control); |
| 2278 | l2cap_seq_list_append(&chan->srej_list, seq); |
| 2279 | } while (chan->srej_list.head != initial_head); |
Mat Martineau | d2a7ac5 | 2012-05-17 20:53:42 -0700 | [diff] [blame] | 2280 | } |
| 2281 | |
Mat Martineau | 608bcc6 | 2012-05-17 20:53:32 -0700 | [diff] [blame] | 2282 | static void l2cap_process_reqseq(struct l2cap_chan *chan, u16 reqseq) |
| 2283 | { |
| 2284 | struct sk_buff *acked_skb; |
| 2285 | u16 ackseq; |
| 2286 | |
Andrei Emeltchenko | b440067 | 2012-07-10 15:27:49 +0300 | [diff] [blame^] | 2287 | BT_DBG("chan %p, reqseq %u", chan, reqseq); |
Mat Martineau | 608bcc6 | 2012-05-17 20:53:32 -0700 | [diff] [blame] | 2288 | |
| 2289 | if (chan->unacked_frames == 0 || reqseq == chan->expected_ack_seq) |
| 2290 | return; |
| 2291 | |
Andrei Emeltchenko | b440067 | 2012-07-10 15:27:49 +0300 | [diff] [blame^] | 2292 | BT_DBG("expected_ack_seq %u, unacked_frames %u", |
Mat Martineau | 608bcc6 | 2012-05-17 20:53:32 -0700 | [diff] [blame] | 2293 | chan->expected_ack_seq, chan->unacked_frames); |
| 2294 | |
| 2295 | for (ackseq = chan->expected_ack_seq; ackseq != reqseq; |
| 2296 | ackseq = __next_seq(chan, ackseq)) { |
| 2297 | |
| 2298 | acked_skb = l2cap_ertm_seq_in_queue(&chan->tx_q, ackseq); |
| 2299 | if (acked_skb) { |
| 2300 | skb_unlink(acked_skb, &chan->tx_q); |
| 2301 | kfree_skb(acked_skb); |
| 2302 | chan->unacked_frames--; |
| 2303 | } |
| 2304 | } |
| 2305 | |
| 2306 | chan->expected_ack_seq = reqseq; |
| 2307 | |
| 2308 | if (chan->unacked_frames == 0) |
| 2309 | __clear_retrans_timer(chan); |
| 2310 | |
Andrei Emeltchenko | b440067 | 2012-07-10 15:27:49 +0300 | [diff] [blame^] | 2311 | BT_DBG("unacked_frames %u", chan->unacked_frames); |
Mat Martineau | 608bcc6 | 2012-05-17 20:53:32 -0700 | [diff] [blame] | 2312 | } |
| 2313 | |
| 2314 | static void l2cap_abort_rx_srej_sent(struct l2cap_chan *chan) |
| 2315 | { |
| 2316 | BT_DBG("chan %p", chan); |
| 2317 | |
| 2318 | chan->expected_tx_seq = chan->buffer_seq; |
| 2319 | l2cap_seq_list_clear(&chan->srej_list); |
| 2320 | skb_queue_purge(&chan->srej_q); |
| 2321 | chan->rx_state = L2CAP_RX_STATE_RECV; |
| 2322 | } |
| 2323 | |
Gustavo Padovan | d660366 | 2012-05-21 13:58:22 -0300 | [diff] [blame] | 2324 | static void l2cap_tx_state_xmit(struct l2cap_chan *chan, |
| 2325 | struct l2cap_ctrl *control, |
| 2326 | struct sk_buff_head *skbs, u8 event) |
Mat Martineau | 608bcc6 | 2012-05-17 20:53:32 -0700 | [diff] [blame] | 2327 | { |
Mat Martineau | 608bcc6 | 2012-05-17 20:53:32 -0700 | [diff] [blame] | 2328 | BT_DBG("chan %p, control %p, skbs %p, event %d", chan, control, skbs, |
| 2329 | event); |
| 2330 | |
| 2331 | switch (event) { |
| 2332 | case L2CAP_EV_DATA_REQUEST: |
| 2333 | if (chan->tx_send_head == NULL) |
| 2334 | chan->tx_send_head = skb_peek(skbs); |
| 2335 | |
| 2336 | skb_queue_splice_tail_init(skbs, &chan->tx_q); |
| 2337 | l2cap_ertm_send(chan); |
| 2338 | break; |
| 2339 | case L2CAP_EV_LOCAL_BUSY_DETECTED: |
| 2340 | BT_DBG("Enter LOCAL_BUSY"); |
| 2341 | set_bit(CONN_LOCAL_BUSY, &chan->conn_state); |
| 2342 | |
| 2343 | if (chan->rx_state == L2CAP_RX_STATE_SREJ_SENT) { |
| 2344 | /* The SREJ_SENT state must be aborted if we are to |
| 2345 | * enter the LOCAL_BUSY state. |
| 2346 | */ |
| 2347 | l2cap_abort_rx_srej_sent(chan); |
| 2348 | } |
| 2349 | |
| 2350 | l2cap_send_ack(chan); |
| 2351 | |
| 2352 | break; |
| 2353 | case L2CAP_EV_LOCAL_BUSY_CLEAR: |
| 2354 | BT_DBG("Exit LOCAL_BUSY"); |
| 2355 | clear_bit(CONN_LOCAL_BUSY, &chan->conn_state); |
| 2356 | |
| 2357 | if (test_bit(CONN_RNR_SENT, &chan->conn_state)) { |
| 2358 | struct l2cap_ctrl local_control; |
| 2359 | |
| 2360 | memset(&local_control, 0, sizeof(local_control)); |
| 2361 | local_control.sframe = 1; |
| 2362 | local_control.super = L2CAP_SUPER_RR; |
| 2363 | local_control.poll = 1; |
| 2364 | local_control.reqseq = chan->buffer_seq; |
Mat Martineau | a67d7f6 | 2012-05-17 20:53:35 -0700 | [diff] [blame] | 2365 | l2cap_send_sframe(chan, &local_control); |
Mat Martineau | 608bcc6 | 2012-05-17 20:53:32 -0700 | [diff] [blame] | 2366 | |
| 2367 | chan->retry_count = 1; |
| 2368 | __set_monitor_timer(chan); |
| 2369 | chan->tx_state = L2CAP_TX_STATE_WAIT_F; |
| 2370 | } |
| 2371 | break; |
| 2372 | case L2CAP_EV_RECV_REQSEQ_AND_FBIT: |
| 2373 | l2cap_process_reqseq(chan, control->reqseq); |
| 2374 | break; |
| 2375 | case L2CAP_EV_EXPLICIT_POLL: |
| 2376 | l2cap_send_rr_or_rnr(chan, 1); |
| 2377 | chan->retry_count = 1; |
| 2378 | __set_monitor_timer(chan); |
| 2379 | __clear_ack_timer(chan); |
| 2380 | chan->tx_state = L2CAP_TX_STATE_WAIT_F; |
| 2381 | break; |
| 2382 | case L2CAP_EV_RETRANS_TO: |
| 2383 | l2cap_send_rr_or_rnr(chan, 1); |
| 2384 | chan->retry_count = 1; |
| 2385 | __set_monitor_timer(chan); |
| 2386 | chan->tx_state = L2CAP_TX_STATE_WAIT_F; |
| 2387 | break; |
| 2388 | case L2CAP_EV_RECV_FBIT: |
| 2389 | /* Nothing to process */ |
| 2390 | break; |
| 2391 | default: |
| 2392 | break; |
| 2393 | } |
Mat Martineau | 608bcc6 | 2012-05-17 20:53:32 -0700 | [diff] [blame] | 2394 | } |
| 2395 | |
Gustavo Padovan | d660366 | 2012-05-21 13:58:22 -0300 | [diff] [blame] | 2396 | static void l2cap_tx_state_wait_f(struct l2cap_chan *chan, |
| 2397 | struct l2cap_ctrl *control, |
| 2398 | struct sk_buff_head *skbs, u8 event) |
Mat Martineau | 608bcc6 | 2012-05-17 20:53:32 -0700 | [diff] [blame] | 2399 | { |
Mat Martineau | 608bcc6 | 2012-05-17 20:53:32 -0700 | [diff] [blame] | 2400 | BT_DBG("chan %p, control %p, skbs %p, event %d", chan, control, skbs, |
| 2401 | event); |
| 2402 | |
| 2403 | switch (event) { |
| 2404 | case L2CAP_EV_DATA_REQUEST: |
| 2405 | if (chan->tx_send_head == NULL) |
| 2406 | chan->tx_send_head = skb_peek(skbs); |
| 2407 | /* Queue data, but don't send. */ |
| 2408 | skb_queue_splice_tail_init(skbs, &chan->tx_q); |
| 2409 | break; |
| 2410 | case L2CAP_EV_LOCAL_BUSY_DETECTED: |
| 2411 | BT_DBG("Enter LOCAL_BUSY"); |
| 2412 | set_bit(CONN_LOCAL_BUSY, &chan->conn_state); |
| 2413 | |
| 2414 | if (chan->rx_state == L2CAP_RX_STATE_SREJ_SENT) { |
| 2415 | /* The SREJ_SENT state must be aborted if we are to |
| 2416 | * enter the LOCAL_BUSY state. |
| 2417 | */ |
| 2418 | l2cap_abort_rx_srej_sent(chan); |
| 2419 | } |
| 2420 | |
| 2421 | l2cap_send_ack(chan); |
| 2422 | |
| 2423 | break; |
| 2424 | case L2CAP_EV_LOCAL_BUSY_CLEAR: |
| 2425 | BT_DBG("Exit LOCAL_BUSY"); |
| 2426 | clear_bit(CONN_LOCAL_BUSY, &chan->conn_state); |
| 2427 | |
| 2428 | if (test_bit(CONN_RNR_SENT, &chan->conn_state)) { |
| 2429 | struct l2cap_ctrl local_control; |
| 2430 | memset(&local_control, 0, sizeof(local_control)); |
| 2431 | local_control.sframe = 1; |
| 2432 | local_control.super = L2CAP_SUPER_RR; |
| 2433 | local_control.poll = 1; |
| 2434 | local_control.reqseq = chan->buffer_seq; |
Mat Martineau | a67d7f6 | 2012-05-17 20:53:35 -0700 | [diff] [blame] | 2435 | l2cap_send_sframe(chan, &local_control); |
Mat Martineau | 608bcc6 | 2012-05-17 20:53:32 -0700 | [diff] [blame] | 2436 | |
| 2437 | chan->retry_count = 1; |
| 2438 | __set_monitor_timer(chan); |
| 2439 | chan->tx_state = L2CAP_TX_STATE_WAIT_F; |
| 2440 | } |
| 2441 | break; |
| 2442 | case L2CAP_EV_RECV_REQSEQ_AND_FBIT: |
| 2443 | l2cap_process_reqseq(chan, control->reqseq); |
| 2444 | |
| 2445 | /* Fall through */ |
| 2446 | |
| 2447 | case L2CAP_EV_RECV_FBIT: |
| 2448 | if (control && control->final) { |
| 2449 | __clear_monitor_timer(chan); |
| 2450 | if (chan->unacked_frames > 0) |
| 2451 | __set_retrans_timer(chan); |
| 2452 | chan->retry_count = 0; |
| 2453 | chan->tx_state = L2CAP_TX_STATE_XMIT; |
| 2454 | BT_DBG("recv fbit tx_state 0x2.2%x", chan->tx_state); |
| 2455 | } |
| 2456 | break; |
| 2457 | case L2CAP_EV_EXPLICIT_POLL: |
| 2458 | /* Ignore */ |
| 2459 | break; |
| 2460 | case L2CAP_EV_MONITOR_TO: |
| 2461 | if (chan->max_tx == 0 || chan->retry_count < chan->max_tx) { |
| 2462 | l2cap_send_rr_or_rnr(chan, 1); |
| 2463 | __set_monitor_timer(chan); |
| 2464 | chan->retry_count++; |
| 2465 | } else { |
| 2466 | l2cap_send_disconn_req(chan->conn, chan, ECONNABORTED); |
| 2467 | } |
| 2468 | break; |
| 2469 | default: |
| 2470 | break; |
| 2471 | } |
Mat Martineau | 608bcc6 | 2012-05-17 20:53:32 -0700 | [diff] [blame] | 2472 | } |
| 2473 | |
Gustavo Padovan | d660366 | 2012-05-21 13:58:22 -0300 | [diff] [blame] | 2474 | static void l2cap_tx(struct l2cap_chan *chan, struct l2cap_ctrl *control, |
| 2475 | struct sk_buff_head *skbs, u8 event) |
Mat Martineau | 608bcc6 | 2012-05-17 20:53:32 -0700 | [diff] [blame] | 2476 | { |
Mat Martineau | 608bcc6 | 2012-05-17 20:53:32 -0700 | [diff] [blame] | 2477 | BT_DBG("chan %p, control %p, skbs %p, event %d, state %d", |
| 2478 | chan, control, skbs, event, chan->tx_state); |
| 2479 | |
| 2480 | switch (chan->tx_state) { |
| 2481 | case L2CAP_TX_STATE_XMIT: |
Gustavo Padovan | d660366 | 2012-05-21 13:58:22 -0300 | [diff] [blame] | 2482 | l2cap_tx_state_xmit(chan, control, skbs, event); |
Mat Martineau | 608bcc6 | 2012-05-17 20:53:32 -0700 | [diff] [blame] | 2483 | break; |
| 2484 | case L2CAP_TX_STATE_WAIT_F: |
Gustavo Padovan | d660366 | 2012-05-21 13:58:22 -0300 | [diff] [blame] | 2485 | l2cap_tx_state_wait_f(chan, control, skbs, event); |
Mat Martineau | 608bcc6 | 2012-05-17 20:53:32 -0700 | [diff] [blame] | 2486 | break; |
| 2487 | default: |
| 2488 | /* Ignore event */ |
| 2489 | break; |
| 2490 | } |
Mat Martineau | 608bcc6 | 2012-05-17 20:53:32 -0700 | [diff] [blame] | 2491 | } |
| 2492 | |
Mat Martineau | 4b51dae9 | 2012-05-17 20:53:37 -0700 | [diff] [blame] | 2493 | static void l2cap_pass_to_tx(struct l2cap_chan *chan, |
| 2494 | struct l2cap_ctrl *control) |
| 2495 | { |
| 2496 | BT_DBG("chan %p, control %p", chan, control); |
Andrei Emeltchenko | 401bb1f | 2012-05-21 15:47:46 +0300 | [diff] [blame] | 2497 | l2cap_tx(chan, control, NULL, L2CAP_EV_RECV_REQSEQ_AND_FBIT); |
Mat Martineau | 4b51dae9 | 2012-05-17 20:53:37 -0700 | [diff] [blame] | 2498 | } |
| 2499 | |
Mat Martineau | f80842a | 2012-05-17 20:53:46 -0700 | [diff] [blame] | 2500 | static void l2cap_pass_to_tx_fbit(struct l2cap_chan *chan, |
| 2501 | struct l2cap_ctrl *control) |
| 2502 | { |
| 2503 | BT_DBG("chan %p, control %p", chan, control); |
Andrei Emeltchenko | 401bb1f | 2012-05-21 15:47:46 +0300 | [diff] [blame] | 2504 | l2cap_tx(chan, control, NULL, L2CAP_EV_RECV_FBIT); |
Mat Martineau | f80842a | 2012-05-17 20:53:46 -0700 | [diff] [blame] | 2505 | } |
| 2506 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2507 | /* Copy frame to all raw sockets on that connection */ |
| 2508 | static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) |
| 2509 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2510 | struct sk_buff *nskb; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2511 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2512 | |
| 2513 | BT_DBG("conn %p", conn); |
| 2514 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 2515 | mutex_lock(&conn->chan_lock); |
Gustavo F. Padovan | 3d57dc6 | 2011-12-17 10:56:45 -0200 | [diff] [blame] | 2516 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 2517 | list_for_each_entry(chan, &conn->chan_l, list) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2518 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 2519 | if (chan->chan_type != L2CAP_CHAN_RAW) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2520 | continue; |
| 2521 | |
| 2522 | /* Don't send frame to the socket it came from */ |
| 2523 | if (skb->sk == sk) |
| 2524 | continue; |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2525 | nskb = skb_clone(skb, GFP_ATOMIC); |
| 2526 | if (!nskb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2527 | continue; |
| 2528 | |
Gustavo Padovan | 80b9802 | 2012-05-27 22:27:51 -0300 | [diff] [blame] | 2529 | if (chan->ops->recv(chan, nskb)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2530 | kfree_skb(nskb); |
| 2531 | } |
Gustavo F. Padovan | 3d57dc6 | 2011-12-17 10:56:45 -0200 | [diff] [blame] | 2532 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 2533 | mutex_unlock(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2534 | } |
| 2535 | |
| 2536 | /* ---- L2CAP signalling commands ---- */ |
Andrei Emeltchenko | b440067 | 2012-07-10 15:27:49 +0300 | [diff] [blame^] | 2537 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, u8 code, |
| 2538 | u8 ident, u16 dlen, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2539 | { |
| 2540 | struct sk_buff *skb, **frag; |
| 2541 | struct l2cap_cmd_hdr *cmd; |
| 2542 | struct l2cap_hdr *lh; |
| 2543 | int len, count; |
| 2544 | |
Andrei Emeltchenko | b440067 | 2012-07-10 15:27:49 +0300 | [diff] [blame^] | 2545 | BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %u", |
| 2546 | conn, code, ident, dlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2547 | |
| 2548 | len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; |
| 2549 | count = min_t(unsigned int, conn->mtu, len); |
| 2550 | |
| 2551 | skb = bt_skb_alloc(count, GFP_ATOMIC); |
| 2552 | if (!skb) |
| 2553 | return NULL; |
| 2554 | |
| 2555 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2556 | lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 2557 | |
| 2558 | if (conn->hcon->type == LE_LINK) |
Andrei Emeltchenko | ac73498 | 2012-05-24 15:42:51 +0300 | [diff] [blame] | 2559 | lh->cid = __constant_cpu_to_le16(L2CAP_CID_LE_SIGNALING); |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 2560 | else |
Andrei Emeltchenko | ac73498 | 2012-05-24 15:42:51 +0300 | [diff] [blame] | 2561 | lh->cid = __constant_cpu_to_le16(L2CAP_CID_SIGNALING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2562 | |
| 2563 | cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); |
| 2564 | cmd->code = code; |
| 2565 | cmd->ident = ident; |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2566 | cmd->len = cpu_to_le16(dlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2567 | |
| 2568 | if (dlen) { |
| 2569 | count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; |
| 2570 | memcpy(skb_put(skb, count), data, count); |
| 2571 | data += count; |
| 2572 | } |
| 2573 | |
| 2574 | len -= skb->len; |
| 2575 | |
| 2576 | /* Continuation fragments (no L2CAP header) */ |
| 2577 | frag = &skb_shinfo(skb)->frag_list; |
| 2578 | while (len) { |
| 2579 | count = min_t(unsigned int, conn->mtu, len); |
| 2580 | |
| 2581 | *frag = bt_skb_alloc(count, GFP_ATOMIC); |
| 2582 | if (!*frag) |
| 2583 | goto fail; |
| 2584 | |
| 2585 | memcpy(skb_put(*frag, count), data, count); |
| 2586 | |
| 2587 | len -= count; |
| 2588 | data += count; |
| 2589 | |
| 2590 | frag = &(*frag)->next; |
| 2591 | } |
| 2592 | |
| 2593 | return skb; |
| 2594 | |
| 2595 | fail: |
| 2596 | kfree_skb(skb); |
| 2597 | return NULL; |
| 2598 | } |
| 2599 | |
| 2600 | static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) |
| 2601 | { |
| 2602 | struct l2cap_conf_opt *opt = *ptr; |
| 2603 | int len; |
| 2604 | |
| 2605 | len = L2CAP_CONF_OPT_SIZE + opt->len; |
| 2606 | *ptr += len; |
| 2607 | |
| 2608 | *type = opt->type; |
| 2609 | *olen = opt->len; |
| 2610 | |
| 2611 | switch (opt->len) { |
| 2612 | case 1: |
| 2613 | *val = *((u8 *) opt->val); |
| 2614 | break; |
| 2615 | |
| 2616 | case 2: |
steven miao | bfaaeb3 | 2010-10-16 18:29:47 -0400 | [diff] [blame] | 2617 | *val = get_unaligned_le16(opt->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2618 | break; |
| 2619 | |
| 2620 | case 4: |
steven miao | bfaaeb3 | 2010-10-16 18:29:47 -0400 | [diff] [blame] | 2621 | *val = get_unaligned_le32(opt->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2622 | break; |
| 2623 | |
| 2624 | default: |
| 2625 | *val = (unsigned long) opt->val; |
| 2626 | break; |
| 2627 | } |
| 2628 | |
Andrei Emeltchenko | b440067 | 2012-07-10 15:27:49 +0300 | [diff] [blame^] | 2629 | BT_DBG("type 0x%2.2x len %u val 0x%lx", *type, opt->len, *val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2630 | return len; |
| 2631 | } |
| 2632 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2633 | static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) |
| 2634 | { |
| 2635 | struct l2cap_conf_opt *opt = *ptr; |
| 2636 | |
Andrei Emeltchenko | b440067 | 2012-07-10 15:27:49 +0300 | [diff] [blame^] | 2637 | BT_DBG("type 0x%2.2x len %u val 0x%lx", type, len, val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2638 | |
| 2639 | opt->type = type; |
| 2640 | opt->len = len; |
| 2641 | |
| 2642 | switch (len) { |
| 2643 | case 1: |
| 2644 | *((u8 *) opt->val) = val; |
| 2645 | break; |
| 2646 | |
| 2647 | case 2: |
Gustavo F. Padovan | 4f8b691 | 2010-10-18 14:25:53 -0200 | [diff] [blame] | 2648 | put_unaligned_le16(val, opt->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2649 | break; |
| 2650 | |
| 2651 | case 4: |
Gustavo F. Padovan | 4f8b691 | 2010-10-18 14:25:53 -0200 | [diff] [blame] | 2652 | put_unaligned_le32(val, opt->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2653 | break; |
| 2654 | |
| 2655 | default: |
| 2656 | memcpy(opt->val, (void *) val, len); |
| 2657 | break; |
| 2658 | } |
| 2659 | |
| 2660 | *ptr += L2CAP_CONF_OPT_SIZE + len; |
| 2661 | } |
| 2662 | |
Andrei Emeltchenko | f89cef0 | 2011-10-13 16:18:55 +0300 | [diff] [blame] | 2663 | static void l2cap_add_opt_efs(void **ptr, struct l2cap_chan *chan) |
| 2664 | { |
| 2665 | struct l2cap_conf_efs efs; |
| 2666 | |
Szymon Janc | 1ec918c | 2011-11-16 09:32:21 +0100 | [diff] [blame] | 2667 | switch (chan->mode) { |
Andrei Emeltchenko | f89cef0 | 2011-10-13 16:18:55 +0300 | [diff] [blame] | 2668 | case L2CAP_MODE_ERTM: |
| 2669 | efs.id = chan->local_id; |
| 2670 | efs.stype = chan->local_stype; |
| 2671 | efs.msdu = cpu_to_le16(chan->local_msdu); |
| 2672 | efs.sdu_itime = cpu_to_le32(chan->local_sdu_itime); |
Andrei Emeltchenko | ac73498 | 2012-05-24 15:42:51 +0300 | [diff] [blame] | 2673 | efs.acc_lat = __constant_cpu_to_le32(L2CAP_DEFAULT_ACC_LAT); |
| 2674 | efs.flush_to = __constant_cpu_to_le32(L2CAP_DEFAULT_FLUSH_TO); |
Andrei Emeltchenko | f89cef0 | 2011-10-13 16:18:55 +0300 | [diff] [blame] | 2675 | break; |
| 2676 | |
| 2677 | case L2CAP_MODE_STREAMING: |
| 2678 | efs.id = 1; |
| 2679 | efs.stype = L2CAP_SERV_BESTEFFORT; |
| 2680 | efs.msdu = cpu_to_le16(chan->local_msdu); |
| 2681 | efs.sdu_itime = cpu_to_le32(chan->local_sdu_itime); |
| 2682 | efs.acc_lat = 0; |
| 2683 | efs.flush_to = 0; |
| 2684 | break; |
| 2685 | |
| 2686 | default: |
| 2687 | return; |
| 2688 | } |
| 2689 | |
| 2690 | l2cap_add_conf_opt(ptr, L2CAP_CONF_EFS, sizeof(efs), |
| 2691 | (unsigned long) &efs); |
| 2692 | } |
| 2693 | |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 2694 | static void l2cap_ack_timeout(struct work_struct *work) |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2695 | { |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 2696 | struct l2cap_chan *chan = container_of(work, struct l2cap_chan, |
Mat Martineau | 0362520 | 2012-05-17 20:53:51 -0700 | [diff] [blame] | 2697 | ack_timer.work); |
| 2698 | u16 frames_to_ack; |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2699 | |
Gustavo F. Padovan | 2fb9b3d | 2011-12-22 16:56:05 -0200 | [diff] [blame] | 2700 | BT_DBG("chan %p", chan); |
| 2701 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 2702 | l2cap_chan_lock(chan); |
| 2703 | |
Mat Martineau | 0362520 | 2012-05-17 20:53:51 -0700 | [diff] [blame] | 2704 | frames_to_ack = __seq_offset(chan, chan->buffer_seq, |
| 2705 | chan->last_acked_seq); |
| 2706 | |
| 2707 | if (frames_to_ack) |
| 2708 | l2cap_send_rr_or_rnr(chan, 0); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 2709 | |
| 2710 | l2cap_chan_unlock(chan); |
Szymon Janc | 09bfb2e | 2012-01-11 10:59:49 +0100 | [diff] [blame] | 2711 | l2cap_chan_put(chan); |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2712 | } |
| 2713 | |
Andrei Emeltchenko | 466f800 | 2012-05-29 13:59:01 +0300 | [diff] [blame] | 2714 | int l2cap_ertm_init(struct l2cap_chan *chan) |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2715 | { |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 2716 | int err; |
| 2717 | |
Mat Martineau | 105bdf9 | 2012-04-27 16:50:48 -0700 | [diff] [blame] | 2718 | chan->next_tx_seq = 0; |
| 2719 | chan->expected_tx_seq = 0; |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 2720 | chan->expected_ack_seq = 0; |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 2721 | chan->unacked_frames = 0; |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 2722 | chan->buffer_seq = 0; |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 2723 | chan->frames_sent = 0; |
Mat Martineau | 105bdf9 | 2012-04-27 16:50:48 -0700 | [diff] [blame] | 2724 | chan->last_acked_seq = 0; |
| 2725 | chan->sdu = NULL; |
| 2726 | chan->sdu_last_frag = NULL; |
| 2727 | chan->sdu_len = 0; |
| 2728 | |
Mat Martineau | d34c34f | 2012-05-14 14:49:27 -0700 | [diff] [blame] | 2729 | skb_queue_head_init(&chan->tx_q); |
| 2730 | |
Mat Martineau | 105bdf9 | 2012-04-27 16:50:48 -0700 | [diff] [blame] | 2731 | if (chan->mode != L2CAP_MODE_ERTM) |
| 2732 | return 0; |
| 2733 | |
| 2734 | chan->rx_state = L2CAP_RX_STATE_RECV; |
| 2735 | chan->tx_state = L2CAP_TX_STATE_XMIT; |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2736 | |
Gustavo F. Padovan | 721c418 | 2011-06-23 19:29:58 -0300 | [diff] [blame] | 2737 | INIT_DELAYED_WORK(&chan->retrans_timer, l2cap_retrans_timeout); |
| 2738 | INIT_DELAYED_WORK(&chan->monitor_timer, l2cap_monitor_timeout); |
| 2739 | INIT_DELAYED_WORK(&chan->ack_timer, l2cap_ack_timeout); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2740 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 2741 | skb_queue_head_init(&chan->srej_q); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 2742 | |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 2743 | err = l2cap_seq_list_init(&chan->srej_list, chan->tx_win); |
| 2744 | if (err < 0) |
| 2745 | return err; |
| 2746 | |
Mat Martineau | 9dc9aff | 2012-05-17 16:20:14 -0700 | [diff] [blame] | 2747 | err = l2cap_seq_list_init(&chan->retrans_list, chan->remote_tx_win); |
| 2748 | if (err < 0) |
| 2749 | l2cap_seq_list_free(&chan->srej_list); |
| 2750 | |
| 2751 | return err; |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2752 | } |
| 2753 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2754 | static inline __u8 l2cap_select_mode(__u8 mode, __u16 remote_feat_mask) |
| 2755 | { |
| 2756 | switch (mode) { |
| 2757 | case L2CAP_MODE_STREAMING: |
| 2758 | case L2CAP_MODE_ERTM: |
| 2759 | if (l2cap_mode_supported(mode, remote_feat_mask)) |
| 2760 | return mode; |
| 2761 | /* fall through */ |
| 2762 | default: |
| 2763 | return L2CAP_MODE_BASIC; |
| 2764 | } |
| 2765 | } |
| 2766 | |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2767 | static inline bool __l2cap_ews_supported(struct l2cap_chan *chan) |
| 2768 | { |
| 2769 | return enable_hs && chan->conn->feat_mask & L2CAP_FEAT_EXT_WINDOW; |
| 2770 | } |
| 2771 | |
Andrei Emeltchenko | f89cef0 | 2011-10-13 16:18:55 +0300 | [diff] [blame] | 2772 | static inline bool __l2cap_efs_supported(struct l2cap_chan *chan) |
| 2773 | { |
| 2774 | return enable_hs && chan->conn->feat_mask & L2CAP_FEAT_EXT_FLOW; |
| 2775 | } |
| 2776 | |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2777 | static inline void l2cap_txwin_setup(struct l2cap_chan *chan) |
| 2778 | { |
| 2779 | if (chan->tx_win > L2CAP_DEFAULT_TX_WINDOW && |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 2780 | __l2cap_ews_supported(chan)) { |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2781 | /* use extended control field */ |
| 2782 | set_bit(FLAG_EXT_CTRL, &chan->flags); |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 2783 | chan->tx_win_max = L2CAP_DEFAULT_EXT_WINDOW; |
| 2784 | } else { |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2785 | chan->tx_win = min_t(u16, chan->tx_win, |
| 2786 | L2CAP_DEFAULT_TX_WINDOW); |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 2787 | chan->tx_win_max = L2CAP_DEFAULT_TX_WINDOW; |
| 2788 | } |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2789 | } |
| 2790 | |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2791 | static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2792 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2793 | struct l2cap_conf_req *req = data; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2794 | struct l2cap_conf_rfc rfc = { .mode = chan->mode }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2795 | void *ptr = req->data; |
Andrei Emeltchenko | c8f7916 | 2011-10-17 12:19:59 +0300 | [diff] [blame] | 2796 | u16 size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2797 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 2798 | BT_DBG("chan %p", chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2799 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2800 | if (chan->num_conf_req || chan->num_conf_rsp) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2801 | goto done; |
| 2802 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2803 | switch (chan->mode) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2804 | case L2CAP_MODE_STREAMING: |
| 2805 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2806 | if (test_bit(CONF_STATE2_DEVICE, &chan->conf_state)) |
Gustavo F. Padovan | 85eb53c | 2010-06-03 18:43:28 -0300 | [diff] [blame] | 2807 | break; |
Gustavo F. Padovan | 85eb53c | 2010-06-03 18:43:28 -0300 | [diff] [blame] | 2808 | |
Andrei Emeltchenko | f89cef0 | 2011-10-13 16:18:55 +0300 | [diff] [blame] | 2809 | if (__l2cap_efs_supported(chan)) |
| 2810 | set_bit(FLAG_EFS_ENABLE, &chan->flags); |
| 2811 | |
Gustavo F. Padovan | 2ba13ed | 2010-06-09 16:39:05 -0300 | [diff] [blame] | 2812 | /* fall through */ |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2813 | default: |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2814 | chan->mode = l2cap_select_mode(rfc.mode, chan->conn->feat_mask); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2815 | break; |
| 2816 | } |
| 2817 | |
| 2818 | done: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2819 | if (chan->imtu != L2CAP_DEFAULT_MTU) |
| 2820 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu); |
Gustavo F. Padovan | 7990681c | 2011-01-24 16:01:43 -0200 | [diff] [blame] | 2821 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2822 | switch (chan->mode) { |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 2823 | case L2CAP_MODE_BASIC: |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2824 | if (!(chan->conn->feat_mask & L2CAP_FEAT_ERTM) && |
| 2825 | !(chan->conn->feat_mask & L2CAP_FEAT_STREAMING)) |
Gustavo F. Padovan | 6340650 | 2010-08-03 23:49:29 -0300 | [diff] [blame] | 2826 | break; |
| 2827 | |
Gustavo F. Padovan | 6254775 | 2010-06-08 20:05:31 -0300 | [diff] [blame] | 2828 | rfc.mode = L2CAP_MODE_BASIC; |
| 2829 | rfc.txwin_size = 0; |
| 2830 | rfc.max_transmit = 0; |
| 2831 | rfc.retrans_timeout = 0; |
| 2832 | rfc.monitor_timeout = 0; |
| 2833 | rfc.max_pdu_size = 0; |
| 2834 | |
Gustavo F. Padovan | 6340650 | 2010-08-03 23:49:29 -0300 | [diff] [blame] | 2835 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
| 2836 | (unsigned long) &rfc); |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 2837 | break; |
| 2838 | |
| 2839 | case L2CAP_MODE_ERTM: |
| 2840 | rfc.mode = L2CAP_MODE_ERTM; |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2841 | rfc.max_transmit = chan->max_tx; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2842 | rfc.retrans_timeout = 0; |
| 2843 | rfc.monitor_timeout = 0; |
Andrei Emeltchenko | c8f7916 | 2011-10-17 12:19:59 +0300 | [diff] [blame] | 2844 | |
| 2845 | size = min_t(u16, L2CAP_DEFAULT_MAX_PDU_SIZE, chan->conn->mtu - |
| 2846 | L2CAP_EXT_HDR_SIZE - |
| 2847 | L2CAP_SDULEN_SIZE - |
| 2848 | L2CAP_FCS_SIZE); |
| 2849 | rfc.max_pdu_size = cpu_to_le16(size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2850 | |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2851 | l2cap_txwin_setup(chan); |
| 2852 | |
| 2853 | rfc.txwin_size = min_t(u16, chan->tx_win, |
| 2854 | L2CAP_DEFAULT_TX_WINDOW); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2855 | |
Gustavo F. Padovan | 6340650 | 2010-08-03 23:49:29 -0300 | [diff] [blame] | 2856 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
| 2857 | (unsigned long) &rfc); |
| 2858 | |
Andrei Emeltchenko | f89cef0 | 2011-10-13 16:18:55 +0300 | [diff] [blame] | 2859 | if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) |
| 2860 | l2cap_add_opt_efs(&ptr, chan); |
| 2861 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2862 | if (!(chan->conn->feat_mask & L2CAP_FEAT_FCS)) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2863 | break; |
| 2864 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2865 | if (chan->fcs == L2CAP_FCS_NONE || |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2866 | test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2867 | chan->fcs = L2CAP_FCS_NONE; |
| 2868 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, chan->fcs); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2869 | } |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2870 | |
| 2871 | if (test_bit(FLAG_EXT_CTRL, &chan->flags)) |
| 2872 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_EWS, 2, |
| 2873 | chan->tx_win); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2874 | break; |
| 2875 | |
| 2876 | case L2CAP_MODE_STREAMING: |
Mat Martineau | 273759e | 2012-05-17 20:53:53 -0700 | [diff] [blame] | 2877 | l2cap_txwin_setup(chan); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2878 | rfc.mode = L2CAP_MODE_STREAMING; |
| 2879 | rfc.txwin_size = 0; |
| 2880 | rfc.max_transmit = 0; |
| 2881 | rfc.retrans_timeout = 0; |
| 2882 | rfc.monitor_timeout = 0; |
Andrei Emeltchenko | c8f7916 | 2011-10-17 12:19:59 +0300 | [diff] [blame] | 2883 | |
| 2884 | size = min_t(u16, L2CAP_DEFAULT_MAX_PDU_SIZE, chan->conn->mtu - |
| 2885 | L2CAP_EXT_HDR_SIZE - |
| 2886 | L2CAP_SDULEN_SIZE - |
| 2887 | L2CAP_FCS_SIZE); |
| 2888 | rfc.max_pdu_size = cpu_to_le16(size); |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 2889 | |
Gustavo F. Padovan | 6340650 | 2010-08-03 23:49:29 -0300 | [diff] [blame] | 2890 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
| 2891 | (unsigned long) &rfc); |
| 2892 | |
Andrei Emeltchenko | f89cef0 | 2011-10-13 16:18:55 +0300 | [diff] [blame] | 2893 | if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) |
| 2894 | l2cap_add_opt_efs(&ptr, chan); |
| 2895 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2896 | if (!(chan->conn->feat_mask & L2CAP_FEAT_FCS)) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2897 | break; |
| 2898 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2899 | if (chan->fcs == L2CAP_FCS_NONE || |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2900 | test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2901 | chan->fcs = L2CAP_FCS_NONE; |
| 2902 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, chan->fcs); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2903 | } |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 2904 | break; |
| 2905 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2906 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2907 | req->dcid = cpu_to_le16(chan->dcid); |
Andrei Emeltchenko | 59e54bd | 2012-05-23 15:44:06 +0300 | [diff] [blame] | 2908 | req->flags = __constant_cpu_to_le16(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2909 | |
| 2910 | return ptr - data; |
| 2911 | } |
| 2912 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2913 | static int l2cap_parse_conf_req(struct l2cap_chan *chan, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2914 | { |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2915 | struct l2cap_conf_rsp *rsp = data; |
| 2916 | void *ptr = rsp->data; |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2917 | void *req = chan->conf_req; |
| 2918 | int len = chan->conf_len; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2919 | int type, hint, olen; |
| 2920 | unsigned long val; |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2921 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 2922 | struct l2cap_conf_efs efs; |
| 2923 | u8 remote_efs = 0; |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 2924 | u16 mtu = L2CAP_DEFAULT_MTU; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2925 | u16 result = L2CAP_CONF_SUCCESS; |
Andrei Emeltchenko | c8f7916 | 2011-10-17 12:19:59 +0300 | [diff] [blame] | 2926 | u16 size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2927 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2928 | BT_DBG("chan %p", chan); |
Marcel Holtmann | 820ae1b | 2006-11-18 22:15:00 +0100 | [diff] [blame] | 2929 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2930 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 2931 | len -= l2cap_get_conf_opt(&req, &type, &olen, &val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2932 | |
Gustavo F. Padovan | 589d274 | 2009-04-20 01:31:07 -0300 | [diff] [blame] | 2933 | hint = type & L2CAP_CONF_HINT; |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 2934 | type &= L2CAP_CONF_MASK; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2935 | |
| 2936 | switch (type) { |
| 2937 | case L2CAP_CONF_MTU: |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 2938 | mtu = val; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2939 | break; |
| 2940 | |
| 2941 | case L2CAP_CONF_FLUSH_TO: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2942 | chan->flush_to = val; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2943 | break; |
| 2944 | |
| 2945 | case L2CAP_CONF_QOS: |
| 2946 | break; |
| 2947 | |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2948 | case L2CAP_CONF_RFC: |
| 2949 | if (olen == sizeof(rfc)) |
| 2950 | memcpy(&rfc, (void *) val, olen); |
| 2951 | break; |
| 2952 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2953 | case L2CAP_CONF_FCS: |
| 2954 | if (val == L2CAP_FCS_NONE) |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2955 | set_bit(CONF_NO_FCS_RECV, &chan->conf_state); |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 2956 | break; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2957 | |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 2958 | case L2CAP_CONF_EFS: |
| 2959 | remote_efs = 1; |
| 2960 | if (olen == sizeof(efs)) |
| 2961 | memcpy(&efs, (void *) val, olen); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2962 | break; |
| 2963 | |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2964 | case L2CAP_CONF_EWS: |
| 2965 | if (!enable_hs) |
| 2966 | return -ECONNREFUSED; |
| 2967 | |
| 2968 | set_bit(FLAG_EXT_CTRL, &chan->flags); |
| 2969 | set_bit(CONF_EWS_RECV, &chan->conf_state); |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 2970 | chan->tx_win_max = L2CAP_DEFAULT_EXT_WINDOW; |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 2971 | chan->remote_tx_win = val; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2972 | break; |
| 2973 | |
| 2974 | default: |
| 2975 | if (hint) |
| 2976 | break; |
| 2977 | |
| 2978 | result = L2CAP_CONF_UNKNOWN; |
| 2979 | *((u8 *) ptr++) = type; |
| 2980 | break; |
| 2981 | } |
| 2982 | } |
| 2983 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2984 | if (chan->num_conf_rsp || chan->num_conf_req > 1) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2985 | goto done; |
| 2986 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2987 | switch (chan->mode) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2988 | case L2CAP_MODE_STREAMING: |
| 2989 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2990 | if (!test_bit(CONF_STATE2_DEVICE, &chan->conf_state)) { |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2991 | chan->mode = l2cap_select_mode(rfc.mode, |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2992 | chan->conn->feat_mask); |
Gustavo F. Padovan | 85eb53c | 2010-06-03 18:43:28 -0300 | [diff] [blame] | 2993 | break; |
| 2994 | } |
| 2995 | |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 2996 | if (remote_efs) { |
| 2997 | if (__l2cap_efs_supported(chan)) |
| 2998 | set_bit(FLAG_EFS_ENABLE, &chan->flags); |
| 2999 | else |
| 3000 | return -ECONNREFUSED; |
| 3001 | } |
| 3002 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3003 | if (chan->mode != rfc.mode) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3004 | return -ECONNREFUSED; |
Gustavo F. Padovan | 742e519 | 2010-06-08 19:09:48 -0300 | [diff] [blame] | 3005 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3006 | break; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3007 | } |
| 3008 | |
| 3009 | done: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3010 | if (chan->mode != rfc.mode) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3011 | result = L2CAP_CONF_UNACCEPT; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3012 | rfc.mode = chan->mode; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3013 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 3014 | if (chan->num_conf_rsp == 1) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3015 | return -ECONNREFUSED; |
| 3016 | |
| 3017 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 3018 | sizeof(rfc), (unsigned long) &rfc); |
| 3019 | } |
| 3020 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3021 | if (result == L2CAP_CONF_SUCCESS) { |
| 3022 | /* Configure output options and let the other side know |
| 3023 | * which ones we don't like. */ |
| 3024 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3025 | if (mtu < L2CAP_DEFAULT_MIN_MTU) |
| 3026 | result = L2CAP_CONF_UNACCEPT; |
| 3027 | else { |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3028 | chan->omtu = mtu; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3029 | set_bit(CONF_MTU_DONE, &chan->conf_state); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3030 | } |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3031 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->omtu); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3032 | |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 3033 | if (remote_efs) { |
| 3034 | if (chan->local_stype != L2CAP_SERV_NOTRAFIC && |
| 3035 | efs.stype != L2CAP_SERV_NOTRAFIC && |
| 3036 | efs.stype != chan->local_stype) { |
| 3037 | |
| 3038 | result = L2CAP_CONF_UNACCEPT; |
| 3039 | |
| 3040 | if (chan->num_conf_req >= 1) |
| 3041 | return -ECONNREFUSED; |
| 3042 | |
| 3043 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, |
Gustavo F. Padovan | 3e6b3b9 | 2011-11-01 14:06:23 -0200 | [diff] [blame] | 3044 | sizeof(efs), |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 3045 | (unsigned long) &efs); |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 3046 | } else { |
Gustavo F. Padovan | 3e6b3b9 | 2011-11-01 14:06:23 -0200 | [diff] [blame] | 3047 | /* Send PENDING Conf Rsp */ |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 3048 | result = L2CAP_CONF_PENDING; |
| 3049 | set_bit(CONF_LOC_CONF_PEND, &chan->conf_state); |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 3050 | } |
| 3051 | } |
| 3052 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3053 | switch (rfc.mode) { |
| 3054 | case L2CAP_MODE_BASIC: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3055 | chan->fcs = L2CAP_FCS_NONE; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3056 | set_bit(CONF_MODE_DONE, &chan->conf_state); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3057 | break; |
| 3058 | |
| 3059 | case L2CAP_MODE_ERTM: |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 3060 | if (!test_bit(CONF_EWS_RECV, &chan->conf_state)) |
| 3061 | chan->remote_tx_win = rfc.txwin_size; |
| 3062 | else |
| 3063 | rfc.txwin_size = L2CAP_DEFAULT_TX_WINDOW; |
| 3064 | |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 3065 | chan->remote_max_tx = rfc.max_transmit; |
Mat Martineau | 86b1b26 | 2010-08-05 15:54:22 -0700 | [diff] [blame] | 3066 | |
Andrei Emeltchenko | c8f7916 | 2011-10-17 12:19:59 +0300 | [diff] [blame] | 3067 | size = min_t(u16, le16_to_cpu(rfc.max_pdu_size), |
| 3068 | chan->conn->mtu - |
| 3069 | L2CAP_EXT_HDR_SIZE - |
| 3070 | L2CAP_SDULEN_SIZE - |
| 3071 | L2CAP_FCS_SIZE); |
| 3072 | rfc.max_pdu_size = cpu_to_le16(size); |
| 3073 | chan->remote_mps = size; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3074 | |
Gustavo F. Padovan | 10467e9 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 3075 | rfc.retrans_timeout = |
Andrei Emeltchenko | 4fd21a8 | 2012-03-12 12:13:10 +0200 | [diff] [blame] | 3076 | __constant_cpu_to_le16(L2CAP_DEFAULT_RETRANS_TO); |
Gustavo F. Padovan | 10467e9 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 3077 | rfc.monitor_timeout = |
Andrei Emeltchenko | 4fd21a8 | 2012-03-12 12:13:10 +0200 | [diff] [blame] | 3078 | __constant_cpu_to_le16(L2CAP_DEFAULT_MONITOR_TO); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3079 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3080 | set_bit(CONF_MODE_DONE, &chan->conf_state); |
Gustavo F. Padovan | 68ae663 | 2009-10-17 21:41:01 -0300 | [diff] [blame] | 3081 | |
| 3082 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 3083 | sizeof(rfc), (unsigned long) &rfc); |
| 3084 | |
Andrei Emeltchenko | 42dceae | 2011-10-17 14:35:30 +0300 | [diff] [blame] | 3085 | if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) { |
| 3086 | chan->remote_id = efs.id; |
| 3087 | chan->remote_stype = efs.stype; |
| 3088 | chan->remote_msdu = le16_to_cpu(efs.msdu); |
| 3089 | chan->remote_flush_to = |
| 3090 | le32_to_cpu(efs.flush_to); |
| 3091 | chan->remote_acc_lat = |
| 3092 | le32_to_cpu(efs.acc_lat); |
| 3093 | chan->remote_sdu_itime = |
| 3094 | le32_to_cpu(efs.sdu_itime); |
| 3095 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, |
| 3096 | sizeof(efs), (unsigned long) &efs); |
| 3097 | } |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3098 | break; |
| 3099 | |
| 3100 | case L2CAP_MODE_STREAMING: |
Andrei Emeltchenko | c8f7916 | 2011-10-17 12:19:59 +0300 | [diff] [blame] | 3101 | size = min_t(u16, le16_to_cpu(rfc.max_pdu_size), |
| 3102 | chan->conn->mtu - |
| 3103 | L2CAP_EXT_HDR_SIZE - |
| 3104 | L2CAP_SDULEN_SIZE - |
| 3105 | L2CAP_FCS_SIZE); |
| 3106 | rfc.max_pdu_size = cpu_to_le16(size); |
| 3107 | chan->remote_mps = size; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3108 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3109 | set_bit(CONF_MODE_DONE, &chan->conf_state); |
Gustavo F. Padovan | 68ae663 | 2009-10-17 21:41:01 -0300 | [diff] [blame] | 3110 | |
| 3111 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 3112 | sizeof(rfc), (unsigned long) &rfc); |
| 3113 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3114 | break; |
| 3115 | |
| 3116 | default: |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 3117 | result = L2CAP_CONF_UNACCEPT; |
| 3118 | |
| 3119 | memset(&rfc, 0, sizeof(rfc)); |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3120 | rfc.mode = chan->mode; |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 3121 | } |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3122 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3123 | if (result == L2CAP_CONF_SUCCESS) |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3124 | set_bit(CONF_OUTPUT_DONE, &chan->conf_state); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3125 | } |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 3126 | rsp->scid = cpu_to_le16(chan->dcid); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3127 | rsp->result = cpu_to_le16(result); |
Andrei Emeltchenko | 59e54bd | 2012-05-23 15:44:06 +0300 | [diff] [blame] | 3128 | rsp->flags = __constant_cpu_to_le16(0); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3129 | |
| 3130 | return ptr - data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3131 | } |
| 3132 | |
Gustavo F. Padovan | b445003 | 2011-04-12 18:15:09 -0300 | [diff] [blame] | 3133 | 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] | 3134 | { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3135 | struct l2cap_conf_req *req = data; |
| 3136 | void *ptr = req->data; |
| 3137 | int type, olen; |
| 3138 | unsigned long val; |
Mat Martineau | 36e999a | 2011-12-08 17:23:21 -0800 | [diff] [blame] | 3139 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
Andrei Emeltchenko | 66af7aa | 2011-11-07 14:20:33 +0200 | [diff] [blame] | 3140 | struct l2cap_conf_efs efs; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3141 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 3142 | 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] | 3143 | |
| 3144 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 3145 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); |
| 3146 | |
| 3147 | switch (type) { |
| 3148 | case L2CAP_CONF_MTU: |
| 3149 | if (val < L2CAP_DEFAULT_MIN_MTU) { |
| 3150 | *result = L2CAP_CONF_UNACCEPT; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3151 | chan->imtu = L2CAP_DEFAULT_MIN_MTU; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3152 | } else |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3153 | chan->imtu = val; |
| 3154 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3155 | break; |
| 3156 | |
| 3157 | case L2CAP_CONF_FLUSH_TO: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3158 | chan->flush_to = val; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3159 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3160 | 2, chan->flush_to); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3161 | break; |
| 3162 | |
| 3163 | case L2CAP_CONF_RFC: |
| 3164 | if (olen == sizeof(rfc)) |
| 3165 | memcpy(&rfc, (void *)val, olen); |
| 3166 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3167 | if (test_bit(CONF_STATE2_DEVICE, &chan->conf_state) && |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3168 | rfc.mode != chan->mode) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3169 | return -ECONNREFUSED; |
| 3170 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3171 | chan->fcs = 0; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3172 | |
| 3173 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 3174 | sizeof(rfc), (unsigned long) &rfc); |
| 3175 | break; |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 3176 | |
| 3177 | case L2CAP_CONF_EWS: |
| 3178 | chan->tx_win = min_t(u16, val, |
| 3179 | L2CAP_DEFAULT_EXT_WINDOW); |
Gustavo F. Padovan | 3e6b3b9 | 2011-11-01 14:06:23 -0200 | [diff] [blame] | 3180 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_EWS, 2, |
| 3181 | chan->tx_win); |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 3182 | break; |
Andrei Emeltchenko | 66af7aa | 2011-11-07 14:20:33 +0200 | [diff] [blame] | 3183 | |
| 3184 | case L2CAP_CONF_EFS: |
| 3185 | if (olen == sizeof(efs)) |
| 3186 | memcpy(&efs, (void *)val, olen); |
| 3187 | |
| 3188 | if (chan->local_stype != L2CAP_SERV_NOTRAFIC && |
| 3189 | efs.stype != L2CAP_SERV_NOTRAFIC && |
| 3190 | efs.stype != chan->local_stype) |
| 3191 | return -ECONNREFUSED; |
| 3192 | |
| 3193 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, |
| 3194 | sizeof(efs), (unsigned long) &efs); |
| 3195 | break; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3196 | } |
| 3197 | } |
| 3198 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3199 | if (chan->mode == L2CAP_MODE_BASIC && chan->mode != rfc.mode) |
Gustavo F. Padovan | 6c2ea7a | 2010-06-08 20:08:49 -0300 | [diff] [blame] | 3200 | return -ECONNREFUSED; |
| 3201 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3202 | chan->mode = rfc.mode; |
Gustavo F. Padovan | 6c2ea7a | 2010-06-08 20:08:49 -0300 | [diff] [blame] | 3203 | |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 3204 | if (*result == L2CAP_CONF_SUCCESS || *result == L2CAP_CONF_PENDING) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3205 | switch (rfc.mode) { |
| 3206 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3207 | chan->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); |
| 3208 | chan->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); |
| 3209 | chan->mps = le16_to_cpu(rfc.max_pdu_size); |
Andrei Emeltchenko | 66af7aa | 2011-11-07 14:20:33 +0200 | [diff] [blame] | 3210 | |
| 3211 | if (test_bit(FLAG_EFS_ENABLE, &chan->flags)) { |
| 3212 | chan->local_msdu = le16_to_cpu(efs.msdu); |
| 3213 | chan->local_sdu_itime = |
| 3214 | le32_to_cpu(efs.sdu_itime); |
| 3215 | chan->local_acc_lat = le32_to_cpu(efs.acc_lat); |
| 3216 | chan->local_flush_to = |
| 3217 | le32_to_cpu(efs.flush_to); |
| 3218 | } |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3219 | break; |
Andrei Emeltchenko | 66af7aa | 2011-11-07 14:20:33 +0200 | [diff] [blame] | 3220 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3221 | case L2CAP_MODE_STREAMING: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3222 | chan->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3223 | } |
| 3224 | } |
| 3225 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 3226 | req->dcid = cpu_to_le16(chan->dcid); |
Andrei Emeltchenko | 59e54bd | 2012-05-23 15:44:06 +0300 | [diff] [blame] | 3227 | req->flags = __constant_cpu_to_le16(0); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3228 | |
| 3229 | return ptr - data; |
| 3230 | } |
| 3231 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 3232 | 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] | 3233 | { |
| 3234 | struct l2cap_conf_rsp *rsp = data; |
| 3235 | void *ptr = rsp->data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3236 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 3237 | BT_DBG("chan %p", chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3238 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 3239 | rsp->scid = cpu_to_le16(chan->dcid); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3240 | rsp->result = cpu_to_le16(result); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 3241 | rsp->flags = cpu_to_le16(flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3242 | |
| 3243 | return ptr - data; |
| 3244 | } |
| 3245 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 3246 | void __l2cap_connect_rsp_defer(struct l2cap_chan *chan) |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 3247 | { |
| 3248 | struct l2cap_conn_rsp rsp; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 3249 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 3250 | u8 buf[128]; |
| 3251 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 3252 | rsp.scid = cpu_to_le16(chan->dcid); |
| 3253 | rsp.dcid = cpu_to_le16(chan->scid); |
Andrei Emeltchenko | ac73498 | 2012-05-24 15:42:51 +0300 | [diff] [blame] | 3254 | rsp.result = __constant_cpu_to_le16(L2CAP_CR_SUCCESS); |
| 3255 | rsp.status = __constant_cpu_to_le16(L2CAP_CS_NO_INFO); |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 3256 | l2cap_send_cmd(conn, chan->ident, |
| 3257 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
| 3258 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3259 | if (test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 3260 | return; |
| 3261 | |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 3262 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
| 3263 | l2cap_build_conf_req(chan, buf), buf); |
| 3264 | chan->num_conf_req++; |
| 3265 | } |
| 3266 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3267 | 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] | 3268 | { |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3269 | int type, olen; |
| 3270 | unsigned long val; |
| 3271 | struct l2cap_conf_rfc rfc; |
| 3272 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3273 | BT_DBG("chan %p, rsp %p, len %d", chan, rsp, len); |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3274 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3275 | if ((chan->mode != L2CAP_MODE_ERTM) && (chan->mode != L2CAP_MODE_STREAMING)) |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3276 | return; |
| 3277 | |
| 3278 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 3279 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); |
| 3280 | |
Szymon Janc | 8f321f8 | 2012-06-08 11:33:33 +0200 | [diff] [blame] | 3281 | if (type != L2CAP_CONF_RFC) |
| 3282 | continue; |
| 3283 | |
| 3284 | if (olen != sizeof(rfc)) |
| 3285 | break; |
| 3286 | |
| 3287 | memcpy(&rfc, (void *)val, olen); |
| 3288 | goto done; |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3289 | } |
| 3290 | |
Mat Martineau | 36e999a | 2011-12-08 17:23:21 -0800 | [diff] [blame] | 3291 | /* Use sane default values in case a misbehaving remote device |
| 3292 | * did not send an RFC option. |
| 3293 | */ |
| 3294 | rfc.mode = chan->mode; |
Andrei Emeltchenko | ac73498 | 2012-05-24 15:42:51 +0300 | [diff] [blame] | 3295 | rfc.retrans_timeout = __constant_cpu_to_le16(L2CAP_DEFAULT_RETRANS_TO); |
| 3296 | rfc.monitor_timeout = __constant_cpu_to_le16(L2CAP_DEFAULT_MONITOR_TO); |
Mat Martineau | 36e999a | 2011-12-08 17:23:21 -0800 | [diff] [blame] | 3297 | rfc.max_pdu_size = cpu_to_le16(chan->imtu); |
| 3298 | |
| 3299 | BT_ERR("Expected RFC option was not found, using defaults"); |
| 3300 | |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3301 | done: |
| 3302 | switch (rfc.mode) { |
| 3303 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3304 | chan->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); |
| 3305 | chan->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); |
| 3306 | chan->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3307 | break; |
| 3308 | case L2CAP_MODE_STREAMING: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3309 | chan->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3310 | } |
| 3311 | } |
| 3312 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 3313 | static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3314 | { |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 3315 | struct l2cap_cmd_rej_unk *rej = (struct l2cap_cmd_rej_unk *) data; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 3316 | |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 3317 | if (rej->reason != L2CAP_REJ_NOT_UNDERSTOOD) |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 3318 | return 0; |
| 3319 | |
| 3320 | if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) && |
| 3321 | cmd->ident == conn->info_ident) { |
Ulisses Furquim | 17cd3f3 | 2012-01-30 18:26:28 -0200 | [diff] [blame] | 3322 | cancel_delayed_work(&conn->info_timer); |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 3323 | |
| 3324 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 3325 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 3326 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 3327 | l2cap_conn_start(conn); |
| 3328 | } |
| 3329 | |
| 3330 | return 0; |
| 3331 | } |
| 3332 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3333 | static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3334 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3335 | struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; |
| 3336 | struct l2cap_conn_rsp rsp; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 3337 | struct l2cap_chan *chan = NULL, *pchan; |
Nathan Holstein | d793fe8 | 2010-10-15 11:54:02 -0400 | [diff] [blame] | 3338 | struct sock *parent, *sk = NULL; |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 3339 | int result, status = L2CAP_CS_NO_INFO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3340 | |
| 3341 | u16 dcid = 0, scid = __le16_to_cpu(req->scid); |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 3342 | __le16 psm = req->psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3343 | |
Andrei Emeltchenko | 097db76 | 2012-03-09 14:16:17 +0200 | [diff] [blame] | 3344 | BT_DBG("psm 0x%2.2x scid 0x%4.4x", __le16_to_cpu(psm), scid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3345 | |
| 3346 | /* Check if we have socket listening on psm */ |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 3347 | pchan = l2cap_global_chan_by_psm(BT_LISTEN, psm, conn->src, conn->dst); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 3348 | if (!pchan) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3349 | result = L2CAP_CR_BAD_PSM; |
| 3350 | goto sendresp; |
| 3351 | } |
| 3352 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 3353 | parent = pchan->sk; |
| 3354 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3355 | mutex_lock(&conn->chan_lock); |
Gustavo F. Padovan | aa2ac88 | 2011-06-24 01:53:01 -0300 | [diff] [blame] | 3356 | lock_sock(parent); |
Gustavo F. Padovan | e0f0cb5 | 2010-11-01 18:43:53 +0000 | [diff] [blame] | 3357 | |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 3358 | /* Check if the ACL is secure enough (if not SDP) */ |
Andrei Emeltchenko | 2983fd6 | 2012-05-24 15:42:50 +0300 | [diff] [blame] | 3359 | if (psm != __constant_cpu_to_le16(L2CAP_PSM_SDP) && |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 3360 | !hci_conn_check_link_mode(conn->hcon)) { |
Andrei Emeltchenko | 9f5a0d7 | 2011-11-07 14:20:25 +0200 | [diff] [blame] | 3361 | conn->disc_reason = HCI_ERROR_AUTH_FAILURE; |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 3362 | result = L2CAP_CR_SEC_BLOCK; |
| 3363 | goto response; |
| 3364 | } |
| 3365 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3366 | result = L2CAP_CR_NO_MEM; |
| 3367 | |
Gustavo Padovan | 2dfa100 | 2012-05-27 22:27:58 -0300 | [diff] [blame] | 3368 | /* Check if we already have channel with that dcid */ |
| 3369 | if (__l2cap_get_chan_by_dcid(conn, scid)) |
| 3370 | goto response; |
| 3371 | |
Gustavo Padovan | 80b9802 | 2012-05-27 22:27:51 -0300 | [diff] [blame] | 3372 | chan = pchan->ops->new_connection(pchan); |
Gustavo F. Padovan | 80808e4 | 2011-05-16 17:24:37 -0300 | [diff] [blame] | 3373 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3374 | goto response; |
| 3375 | |
Gustavo F. Padovan | 80808e4 | 2011-05-16 17:24:37 -0300 | [diff] [blame] | 3376 | sk = chan->sk; |
| 3377 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3378 | hci_conn_hold(conn->hcon); |
| 3379 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3380 | bacpy(&bt_sk(sk)->src, conn->src); |
| 3381 | bacpy(&bt_sk(sk)->dst, conn->dst); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 3382 | chan->psm = psm; |
| 3383 | chan->dcid = scid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3384 | |
Gustavo F. Padovan | d101024 | 2011-03-25 00:39:48 -0300 | [diff] [blame] | 3385 | bt_accept_enqueue(parent, sk); |
| 3386 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3387 | __l2cap_chan_add(conn, chan); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3388 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 3389 | dcid = chan->scid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3390 | |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 3391 | __set_chan_timer(chan, sk->sk_sndtimeo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3392 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 3393 | chan->ident = cmd->ident; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3394 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 3395 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) { |
Gustavo F. Padovan | d45fc42 | 2011-11-05 19:54:24 -0200 | [diff] [blame] | 3396 | if (l2cap_chan_check_security(chan)) { |
Gustavo Padovan | c5daa68 | 2012-05-16 12:17:10 -0300 | [diff] [blame] | 3397 | if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) { |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 3398 | __l2cap_state_change(chan, BT_CONNECT2); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 3399 | result = L2CAP_CR_PEND; |
| 3400 | status = L2CAP_CS_AUTHOR_PEND; |
| 3401 | parent->sk_data_ready(parent, 0); |
| 3402 | } else { |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 3403 | __l2cap_state_change(chan, BT_CONFIG); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 3404 | result = L2CAP_CR_SUCCESS; |
| 3405 | status = L2CAP_CS_NO_INFO; |
| 3406 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 3407 | } else { |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 3408 | __l2cap_state_change(chan, BT_CONNECT2); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 3409 | result = L2CAP_CR_PEND; |
| 3410 | status = L2CAP_CS_AUTHEN_PEND; |
| 3411 | } |
| 3412 | } else { |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 3413 | __l2cap_state_change(chan, BT_CONNECT2); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 3414 | result = L2CAP_CR_PEND; |
| 3415 | status = L2CAP_CS_NO_INFO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3416 | } |
| 3417 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3418 | response: |
Gustavo F. Padovan | aa2ac88 | 2011-06-24 01:53:01 -0300 | [diff] [blame] | 3419 | release_sock(parent); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3420 | mutex_unlock(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3421 | |
| 3422 | sendresp: |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 3423 | rsp.scid = cpu_to_le16(scid); |
| 3424 | rsp.dcid = cpu_to_le16(dcid); |
| 3425 | rsp.result = cpu_to_le16(result); |
| 3426 | rsp.status = cpu_to_le16(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3427 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 3428 | |
| 3429 | if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) { |
| 3430 | struct l2cap_info_req info; |
Andrei Emeltchenko | ac73498 | 2012-05-24 15:42:51 +0300 | [diff] [blame] | 3431 | info.type = __constant_cpu_to_le16(L2CAP_IT_FEAT_MASK); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 3432 | |
| 3433 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; |
| 3434 | conn->info_ident = l2cap_get_ident(conn); |
| 3435 | |
Marcel Holtmann | ba13ccd | 2012-03-01 14:25:33 -0800 | [diff] [blame] | 3436 | schedule_delayed_work(&conn->info_timer, L2CAP_INFO_TIMEOUT); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 3437 | |
| 3438 | l2cap_send_cmd(conn, conn->info_ident, |
| 3439 | L2CAP_INFO_REQ, sizeof(info), &info); |
| 3440 | } |
| 3441 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3442 | if (chan && !test_bit(CONF_REQ_SENT, &chan->conf_state) && |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 3443 | result == L2CAP_CR_SUCCESS) { |
| 3444 | u8 buf[128]; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3445 | set_bit(CONF_REQ_SENT, &chan->conf_state); |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 3446 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 3447 | l2cap_build_conf_req(chan, buf), buf); |
| 3448 | chan->num_conf_req++; |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 3449 | } |
| 3450 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3451 | return 0; |
| 3452 | } |
| 3453 | |
| 3454 | static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3455 | { |
| 3456 | struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; |
| 3457 | u16 scid, dcid, result, status; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3458 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3459 | u8 req[128]; |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3460 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3461 | |
| 3462 | scid = __le16_to_cpu(rsp->scid); |
| 3463 | dcid = __le16_to_cpu(rsp->dcid); |
| 3464 | result = __le16_to_cpu(rsp->result); |
| 3465 | status = __le16_to_cpu(rsp->status); |
| 3466 | |
Andrei Emeltchenko | 1b009c9 | 2012-02-21 12:54:54 +0200 | [diff] [blame] | 3467 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", |
| 3468 | dcid, scid, result, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3469 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3470 | mutex_lock(&conn->chan_lock); |
| 3471 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3472 | if (scid) { |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3473 | chan = __l2cap_get_chan_by_scid(conn, scid); |
| 3474 | if (!chan) { |
| 3475 | err = -EFAULT; |
| 3476 | goto unlock; |
| 3477 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3478 | } else { |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3479 | chan = __l2cap_get_chan_by_ident(conn, cmd->ident); |
| 3480 | if (!chan) { |
| 3481 | err = -EFAULT; |
| 3482 | goto unlock; |
| 3483 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3484 | } |
| 3485 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3486 | err = 0; |
| 3487 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3488 | l2cap_chan_lock(chan); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3489 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3490 | switch (result) { |
| 3491 | case L2CAP_CR_SUCCESS: |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 3492 | l2cap_state_change(chan, BT_CONFIG); |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 3493 | chan->ident = 0; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 3494 | chan->dcid = dcid; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3495 | clear_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Marcel Holtmann | 6a8d301 | 2009-02-06 23:56:36 +0100 | [diff] [blame] | 3496 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3497 | if (test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 3498 | break; |
| 3499 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3500 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 3501 | l2cap_build_conf_req(chan, req), req); |
| 3502 | chan->num_conf_req++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3503 | break; |
| 3504 | |
| 3505 | case L2CAP_CR_PEND: |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3506 | set_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3507 | break; |
| 3508 | |
| 3509 | default: |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3510 | l2cap_chan_del(chan, ECONNREFUSED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3511 | break; |
| 3512 | } |
| 3513 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3514 | l2cap_chan_unlock(chan); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3515 | |
| 3516 | unlock: |
| 3517 | mutex_unlock(&conn->chan_lock); |
| 3518 | |
| 3519 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3520 | } |
| 3521 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3522 | static inline void set_default_fcs(struct l2cap_chan *chan) |
Mat Martineau | 8c462b6 | 2010-08-24 15:35:42 -0700 | [diff] [blame] | 3523 | { |
| 3524 | /* FCS is enabled only in ERTM or streaming mode, if one or both |
| 3525 | * sides request it. |
| 3526 | */ |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3527 | if (chan->mode != L2CAP_MODE_ERTM && chan->mode != L2CAP_MODE_STREAMING) |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3528 | chan->fcs = L2CAP_FCS_NONE; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3529 | else if (!test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3530 | chan->fcs = L2CAP_FCS_CRC16; |
Mat Martineau | 8c462b6 | 2010-08-24 15:35:42 -0700 | [diff] [blame] | 3531 | } |
| 3532 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3533 | 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] | 3534 | { |
| 3535 | struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; |
| 3536 | u16 dcid, flags; |
| 3537 | u8 rsp[64]; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3538 | struct l2cap_chan *chan; |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 3539 | int len, err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3540 | |
| 3541 | dcid = __le16_to_cpu(req->dcid); |
| 3542 | flags = __le16_to_cpu(req->flags); |
| 3543 | |
| 3544 | BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); |
| 3545 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 3546 | chan = l2cap_get_chan_by_scid(conn, dcid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3547 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3548 | return -ENOENT; |
| 3549 | |
David S. Miller | 033b114 | 2011-07-21 13:38:42 -0700 | [diff] [blame] | 3550 | if (chan->state != BT_CONFIG && chan->state != BT_CONNECT2) { |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 3551 | struct l2cap_cmd_rej_cid rej; |
Gustavo F. Padovan | df6bd74 | 2010-06-14 02:26:15 -0300 | [diff] [blame] | 3552 | |
Andrei Emeltchenko | ac73498 | 2012-05-24 15:42:51 +0300 | [diff] [blame] | 3553 | rej.reason = __constant_cpu_to_le16(L2CAP_REJ_INVALID_CID); |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 3554 | rej.scid = cpu_to_le16(chan->scid); |
| 3555 | rej.dcid = cpu_to_le16(chan->dcid); |
| 3556 | |
Gustavo F. Padovan | df6bd74 | 2010-06-14 02:26:15 -0300 | [diff] [blame] | 3557 | l2cap_send_cmd(conn, cmd->ident, L2CAP_COMMAND_REJ, |
| 3558 | sizeof(rej), &rej); |
Marcel Holtmann | 354f60a | 2006-11-18 22:15:20 +0100 | [diff] [blame] | 3559 | goto unlock; |
Gustavo F. Padovan | df6bd74 | 2010-06-14 02:26:15 -0300 | [diff] [blame] | 3560 | } |
Marcel Holtmann | 354f60a | 2006-11-18 22:15:20 +0100 | [diff] [blame] | 3561 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3562 | /* Reject if config buffer is too small. */ |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3563 | len = cmd_len - sizeof(*req); |
Dan Rosenberg | 7ac2881 | 2011-06-24 08:38:05 -0400 | [diff] [blame] | 3564 | if (len < 0 || chan->conf_len + len > sizeof(chan->conf_req)) { |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3565 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 3566 | l2cap_build_conf_rsp(chan, rsp, |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3567 | L2CAP_CONF_REJECT, flags), rsp); |
| 3568 | goto unlock; |
| 3569 | } |
| 3570 | |
| 3571 | /* Store config. */ |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 3572 | memcpy(chan->conf_req + chan->conf_len, req->data, len); |
| 3573 | chan->conf_len += len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3574 | |
Andrei Emeltchenko | 59e54bd | 2012-05-23 15:44:06 +0300 | [diff] [blame] | 3575 | if (flags & L2CAP_CONF_FLAG_CONTINUATION) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3576 | /* Incomplete config. Send empty response. */ |
| 3577 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 3578 | l2cap_build_conf_rsp(chan, rsp, |
Andrei Emeltchenko | 5325e5b | 2012-05-23 11:31:22 +0300 | [diff] [blame] | 3579 | L2CAP_CONF_SUCCESS, flags), rsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3580 | goto unlock; |
| 3581 | } |
| 3582 | |
| 3583 | /* Complete config. */ |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 3584 | len = l2cap_parse_conf_req(chan, rsp); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3585 | if (len < 0) { |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 3586 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3587 | goto unlock; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3588 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3589 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3590 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 3591 | chan->num_conf_rsp++; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3592 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3593 | /* Reset config buffer. */ |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 3594 | chan->conf_len = 0; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 3595 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3596 | if (!test_bit(CONF_OUTPUT_DONE, &chan->conf_state)) |
Marcel Holtmann | 876d948 | 2007-10-20 13:35:42 +0200 | [diff] [blame] | 3597 | goto unlock; |
| 3598 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3599 | if (test_bit(CONF_INPUT_DONE, &chan->conf_state)) { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3600 | set_default_fcs(chan); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3601 | |
Mat Martineau | 105bdf9 | 2012-04-27 16:50:48 -0700 | [diff] [blame] | 3602 | if (chan->mode == L2CAP_MODE_ERTM || |
| 3603 | chan->mode == L2CAP_MODE_STREAMING) |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 3604 | err = l2cap_ertm_init(chan); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 3605 | |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 3606 | if (err < 0) |
| 3607 | l2cap_send_disconn_req(chan->conn, chan, -err); |
| 3608 | else |
| 3609 | l2cap_chan_ready(chan); |
| 3610 | |
Marcel Holtmann | 876d948 | 2007-10-20 13:35:42 +0200 | [diff] [blame] | 3611 | goto unlock; |
| 3612 | } |
| 3613 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3614 | if (!test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 3615 | u8 buf[64]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3616 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 3617 | l2cap_build_conf_req(chan, buf), buf); |
| 3618 | chan->num_conf_req++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3619 | } |
| 3620 | |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 3621 | /* Got Conf Rsp PENDING from remote side and asume we sent |
| 3622 | Conf Rsp PENDING in the code above */ |
| 3623 | if (test_bit(CONF_REM_CONF_PEND, &chan->conf_state) && |
| 3624 | test_bit(CONF_LOC_CONF_PEND, &chan->conf_state)) { |
| 3625 | |
| 3626 | /* check compatibility */ |
| 3627 | |
| 3628 | clear_bit(CONF_LOC_CONF_PEND, &chan->conf_state); |
| 3629 | set_bit(CONF_OUTPUT_DONE, &chan->conf_state); |
| 3630 | |
| 3631 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
Gustavo F. Padovan | 3e6b3b9 | 2011-11-01 14:06:23 -0200 | [diff] [blame] | 3632 | l2cap_build_conf_rsp(chan, rsp, |
Andrei Emeltchenko | 5325e5b | 2012-05-23 11:31:22 +0300 | [diff] [blame] | 3633 | L2CAP_CONF_SUCCESS, flags), rsp); |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 3634 | } |
| 3635 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3636 | unlock: |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3637 | l2cap_chan_unlock(chan); |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 3638 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3639 | } |
| 3640 | |
| 3641 | static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3642 | { |
| 3643 | struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; |
| 3644 | u16 scid, flags, result; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3645 | struct l2cap_chan *chan; |
Andrei Emeltchenko | 61386cb | 2012-03-12 12:13:07 +0200 | [diff] [blame] | 3646 | int len = le16_to_cpu(cmd->len) - sizeof(*rsp); |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 3647 | int err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3648 | |
| 3649 | scid = __le16_to_cpu(rsp->scid); |
| 3650 | flags = __le16_to_cpu(rsp->flags); |
| 3651 | result = __le16_to_cpu(rsp->result); |
| 3652 | |
Andrei Emeltchenko | 61386cb | 2012-03-12 12:13:07 +0200 | [diff] [blame] | 3653 | BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x len %d", scid, flags, |
| 3654 | result, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3655 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 3656 | chan = l2cap_get_chan_by_scid(conn, scid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3657 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3658 | return 0; |
| 3659 | |
| 3660 | switch (result) { |
| 3661 | case L2CAP_CONF_SUCCESS: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3662 | l2cap_conf_rfc_get(chan, rsp->data, len); |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 3663 | clear_bit(CONF_REM_CONF_PEND, &chan->conf_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3664 | break; |
| 3665 | |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 3666 | case L2CAP_CONF_PENDING: |
| 3667 | set_bit(CONF_REM_CONF_PEND, &chan->conf_state); |
| 3668 | |
| 3669 | if (test_bit(CONF_LOC_CONF_PEND, &chan->conf_state)) { |
| 3670 | char buf[64]; |
| 3671 | |
| 3672 | len = l2cap_parse_conf_rsp(chan, rsp->data, len, |
| 3673 | buf, &result); |
| 3674 | if (len < 0) { |
| 3675 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
| 3676 | goto done; |
| 3677 | } |
| 3678 | |
| 3679 | /* check compatibility */ |
| 3680 | |
| 3681 | clear_bit(CONF_LOC_CONF_PEND, &chan->conf_state); |
| 3682 | set_bit(CONF_OUTPUT_DONE, &chan->conf_state); |
| 3683 | |
| 3684 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
Gustavo F. Padovan | 3e6b3b9 | 2011-11-01 14:06:23 -0200 | [diff] [blame] | 3685 | l2cap_build_conf_rsp(chan, buf, |
Andrei Emeltchenko | 0e8b207 | 2011-10-17 14:35:32 +0300 | [diff] [blame] | 3686 | L2CAP_CONF_SUCCESS, 0x0000), buf); |
| 3687 | } |
| 3688 | goto done; |
| 3689 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3690 | case L2CAP_CONF_UNACCEPT: |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 3691 | if (chan->num_conf_rsp <= L2CAP_CONF_MAX_CONF_RSP) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3692 | char req[64]; |
| 3693 | |
Andrei Emeltchenko | c2c77ec | 2010-03-19 10:26:28 +0200 | [diff] [blame] | 3694 | if (len > sizeof(req) - sizeof(struct l2cap_conf_req)) { |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 3695 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
Andrei Emeltchenko | c2c77ec | 2010-03-19 10:26:28 +0200 | [diff] [blame] | 3696 | goto done; |
| 3697 | } |
| 3698 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3699 | /* throw out any old stored conf requests */ |
| 3700 | result = L2CAP_CONF_SUCCESS; |
Gustavo F. Padovan | b445003 | 2011-04-12 18:15:09 -0300 | [diff] [blame] | 3701 | len = l2cap_parse_conf_rsp(chan, rsp->data, len, |
| 3702 | req, &result); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3703 | if (len < 0) { |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 3704 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3705 | goto done; |
| 3706 | } |
| 3707 | |
| 3708 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
| 3709 | L2CAP_CONF_REQ, len, req); |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 3710 | chan->num_conf_req++; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3711 | if (result != L2CAP_CONF_SUCCESS) |
| 3712 | goto done; |
| 3713 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3714 | } |
| 3715 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 3716 | default: |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3717 | l2cap_chan_set_err(chan, ECONNRESET); |
Andrei Emeltchenko | 2e0052e | 2012-02-21 12:54:58 +0200 | [diff] [blame] | 3718 | |
Marcel Holtmann | ba13ccd | 2012-03-01 14:25:33 -0800 | [diff] [blame] | 3719 | __set_chan_timer(chan, L2CAP_DISC_REJ_TIMEOUT); |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 3720 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3721 | goto done; |
| 3722 | } |
| 3723 | |
Andrei Emeltchenko | 59e54bd | 2012-05-23 15:44:06 +0300 | [diff] [blame] | 3724 | if (flags & L2CAP_CONF_FLAG_CONTINUATION) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3725 | goto done; |
| 3726 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3727 | set_bit(CONF_INPUT_DONE, &chan->conf_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3728 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 3729 | if (test_bit(CONF_OUTPUT_DONE, &chan->conf_state)) { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3730 | set_default_fcs(chan); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3731 | |
Mat Martineau | 105bdf9 | 2012-04-27 16:50:48 -0700 | [diff] [blame] | 3732 | if (chan->mode == L2CAP_MODE_ERTM || |
| 3733 | chan->mode == L2CAP_MODE_STREAMING) |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 3734 | err = l2cap_ertm_init(chan); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 3735 | |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 3736 | if (err < 0) |
| 3737 | l2cap_send_disconn_req(chan->conn, chan, -err); |
| 3738 | else |
| 3739 | l2cap_chan_ready(chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3740 | } |
| 3741 | |
| 3742 | done: |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3743 | l2cap_chan_unlock(chan); |
Mat Martineau | 3c58819 | 2012-04-11 10:48:42 -0700 | [diff] [blame] | 3744 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3745 | } |
| 3746 | |
| 3747 | static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3748 | { |
| 3749 | struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; |
| 3750 | struct l2cap_disconn_rsp rsp; |
| 3751 | u16 dcid, scid; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3752 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3753 | struct sock *sk; |
| 3754 | |
| 3755 | scid = __le16_to_cpu(req->scid); |
| 3756 | dcid = __le16_to_cpu(req->dcid); |
| 3757 | |
| 3758 | BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); |
| 3759 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3760 | mutex_lock(&conn->chan_lock); |
| 3761 | |
| 3762 | chan = __l2cap_get_chan_by_scid(conn, dcid); |
| 3763 | if (!chan) { |
| 3764 | mutex_unlock(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3765 | return 0; |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3766 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3767 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3768 | l2cap_chan_lock(chan); |
| 3769 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3770 | sk = chan->sk; |
| 3771 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 3772 | rsp.dcid = cpu_to_le16(chan->scid); |
| 3773 | rsp.scid = cpu_to_le16(chan->dcid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3774 | l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); |
| 3775 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3776 | lock_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3777 | sk->sk_shutdown = SHUTDOWN_MASK; |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3778 | release_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3779 | |
Mat Martineau | 61d6ef3 | 2012-04-27 16:50:50 -0700 | [diff] [blame] | 3780 | l2cap_chan_hold(chan); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3781 | l2cap_chan_del(chan, ECONNRESET); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3782 | |
| 3783 | l2cap_chan_unlock(chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3784 | |
Gustavo Padovan | 80b9802 | 2012-05-27 22:27:51 -0300 | [diff] [blame] | 3785 | chan->ops->close(chan); |
Mat Martineau | 61d6ef3 | 2012-04-27 16:50:50 -0700 | [diff] [blame] | 3786 | l2cap_chan_put(chan); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3787 | |
| 3788 | mutex_unlock(&conn->chan_lock); |
| 3789 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3790 | return 0; |
| 3791 | } |
| 3792 | |
| 3793 | static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3794 | { |
| 3795 | struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; |
| 3796 | u16 dcid, scid; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3797 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3798 | |
| 3799 | scid = __le16_to_cpu(rsp->scid); |
| 3800 | dcid = __le16_to_cpu(rsp->dcid); |
| 3801 | |
| 3802 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); |
| 3803 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3804 | mutex_lock(&conn->chan_lock); |
| 3805 | |
| 3806 | chan = __l2cap_get_chan_by_scid(conn, scid); |
| 3807 | if (!chan) { |
| 3808 | mutex_unlock(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3809 | return 0; |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3810 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3811 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3812 | l2cap_chan_lock(chan); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3813 | |
Mat Martineau | 61d6ef3 | 2012-04-27 16:50:50 -0700 | [diff] [blame] | 3814 | l2cap_chan_hold(chan); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3815 | l2cap_chan_del(chan, 0); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 3816 | |
| 3817 | l2cap_chan_unlock(chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3818 | |
Gustavo Padovan | 80b9802 | 2012-05-27 22:27:51 -0300 | [diff] [blame] | 3819 | chan->ops->close(chan); |
Mat Martineau | 61d6ef3 | 2012-04-27 16:50:50 -0700 | [diff] [blame] | 3820 | l2cap_chan_put(chan); |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 3821 | |
| 3822 | mutex_unlock(&conn->chan_lock); |
| 3823 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3824 | return 0; |
| 3825 | } |
| 3826 | |
| 3827 | static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3828 | { |
| 3829 | struct l2cap_info_req *req = (struct l2cap_info_req *) data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3830 | u16 type; |
| 3831 | |
| 3832 | type = __le16_to_cpu(req->type); |
| 3833 | |
| 3834 | BT_DBG("type 0x%4.4x", type); |
| 3835 | |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 3836 | if (type == L2CAP_IT_FEAT_MASK) { |
| 3837 | u8 buf[8]; |
Marcel Holtmann | 44dd46d | 2009-05-02 19:09:01 -0700 | [diff] [blame] | 3838 | u32 feat_mask = l2cap_feat_mask; |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 3839 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
Andrei Emeltchenko | ac73498 | 2012-05-24 15:42:51 +0300 | [diff] [blame] | 3840 | rsp->type = __constant_cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 3841 | rsp->result = __constant_cpu_to_le16(L2CAP_IR_SUCCESS); |
Gustavo F. Padovan | d1c4a17 | 2010-07-18 16:25:54 -0300 | [diff] [blame] | 3842 | if (!disable_ertm) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3843 | feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING |
| 3844 | | L2CAP_FEAT_FCS; |
Andrei Emeltchenko | a5fd6f3 | 2011-09-16 16:26:32 +0300 | [diff] [blame] | 3845 | if (enable_hs) |
Andrei Emeltchenko | 6327eb9 | 2011-10-11 13:37:42 +0300 | [diff] [blame] | 3846 | feat_mask |= L2CAP_FEAT_EXT_FLOW |
| 3847 | | L2CAP_FEAT_EXT_WINDOW; |
Andrei Emeltchenko | a5fd6f3 | 2011-09-16 16:26:32 +0300 | [diff] [blame] | 3848 | |
Gustavo F. Padovan | 1b7bf4e | 2009-08-24 00:45:20 -0300 | [diff] [blame] | 3849 | put_unaligned_le32(feat_mask, rsp->data); |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 3850 | l2cap_send_cmd(conn, cmd->ident, |
| 3851 | L2CAP_INFO_RSP, sizeof(buf), buf); |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 3852 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
| 3853 | u8 buf[12]; |
| 3854 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
Mat Martineau | 50a147c | 2011-11-02 16:18:34 -0700 | [diff] [blame] | 3855 | |
| 3856 | if (enable_hs) |
| 3857 | l2cap_fixed_chan[0] |= L2CAP_FC_A2MP; |
| 3858 | else |
| 3859 | l2cap_fixed_chan[0] &= ~L2CAP_FC_A2MP; |
| 3860 | |
Andrei Emeltchenko | ac73498 | 2012-05-24 15:42:51 +0300 | [diff] [blame] | 3861 | rsp->type = __constant_cpu_to_le16(L2CAP_IT_FIXED_CHAN); |
| 3862 | rsp->result = __constant_cpu_to_le16(L2CAP_IR_SUCCESS); |
Andrei Emeltchenko | c6337ea | 2011-10-20 17:02:44 +0300 | [diff] [blame] | 3863 | memcpy(rsp->data, l2cap_fixed_chan, sizeof(l2cap_fixed_chan)); |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 3864 | l2cap_send_cmd(conn, cmd->ident, |
| 3865 | L2CAP_INFO_RSP, sizeof(buf), buf); |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 3866 | } else { |
| 3867 | struct l2cap_info_rsp rsp; |
| 3868 | rsp.type = cpu_to_le16(type); |
Andrei Emeltchenko | ac73498 | 2012-05-24 15:42:51 +0300 | [diff] [blame] | 3869 | rsp.result = __constant_cpu_to_le16(L2CAP_IR_NOTSUPP); |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 3870 | l2cap_send_cmd(conn, cmd->ident, |
| 3871 | L2CAP_INFO_RSP, sizeof(rsp), &rsp); |
| 3872 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3873 | |
| 3874 | return 0; |
| 3875 | } |
| 3876 | |
| 3877 | static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3878 | { |
| 3879 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; |
| 3880 | u16 type, result; |
| 3881 | |
| 3882 | type = __le16_to_cpu(rsp->type); |
| 3883 | result = __le16_to_cpu(rsp->result); |
| 3884 | |
| 3885 | BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); |
| 3886 | |
Andrei Emeltchenko | e90165b | 2011-03-25 11:31:41 +0200 | [diff] [blame] | 3887 | /* L2CAP Info req/rsp are unbound to channels, add extra checks */ |
| 3888 | if (cmd->ident != conn->info_ident || |
| 3889 | conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) |
| 3890 | return 0; |
| 3891 | |
Ulisses Furquim | 17cd3f3 | 2012-01-30 18:26:28 -0200 | [diff] [blame] | 3892 | cancel_delayed_work(&conn->info_timer); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 3893 | |
Ville Tervo | adb08ed | 2010-08-04 09:43:33 +0300 | [diff] [blame] | 3894 | if (result != L2CAP_IR_SUCCESS) { |
| 3895 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
| 3896 | conn->info_ident = 0; |
| 3897 | |
| 3898 | l2cap_conn_start(conn); |
| 3899 | |
| 3900 | return 0; |
| 3901 | } |
| 3902 | |
Andrei Emeltchenko | 978c93b | 2012-02-29 10:41:41 +0200 | [diff] [blame] | 3903 | switch (type) { |
| 3904 | case L2CAP_IT_FEAT_MASK: |
Harvey Harrison | 8398531 | 2008-05-02 16:25:46 -0700 | [diff] [blame] | 3905 | conn->feat_mask = get_unaligned_le32(rsp->data); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 3906 | |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 3907 | if (conn->feat_mask & L2CAP_FEAT_FIXED_CHAN) { |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 3908 | struct l2cap_info_req req; |
Andrei Emeltchenko | ac73498 | 2012-05-24 15:42:51 +0300 | [diff] [blame] | 3909 | req.type = __constant_cpu_to_le16(L2CAP_IT_FIXED_CHAN); |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 3910 | |
| 3911 | conn->info_ident = l2cap_get_ident(conn); |
| 3912 | |
| 3913 | l2cap_send_cmd(conn, conn->info_ident, |
| 3914 | L2CAP_INFO_REQ, sizeof(req), &req); |
| 3915 | } else { |
| 3916 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
| 3917 | conn->info_ident = 0; |
| 3918 | |
| 3919 | l2cap_conn_start(conn); |
| 3920 | } |
Andrei Emeltchenko | 978c93b | 2012-02-29 10:41:41 +0200 | [diff] [blame] | 3921 | break; |
| 3922 | |
| 3923 | case L2CAP_IT_FIXED_CHAN: |
| 3924 | conn->fixed_chan_mask = rsp->data[0]; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 3925 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 3926 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 3927 | |
| 3928 | l2cap_conn_start(conn); |
Andrei Emeltchenko | 978c93b | 2012-02-29 10:41:41 +0200 | [diff] [blame] | 3929 | break; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 3930 | } |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 3931 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3932 | return 0; |
| 3933 | } |
| 3934 | |
Mat Martineau | f94ff6f | 2011-11-02 16:18:32 -0700 | [diff] [blame] | 3935 | static inline int l2cap_create_channel_req(struct l2cap_conn *conn, |
| 3936 | struct l2cap_cmd_hdr *cmd, u16 cmd_len, |
| 3937 | void *data) |
| 3938 | { |
| 3939 | struct l2cap_create_chan_req *req = data; |
| 3940 | struct l2cap_create_chan_rsp rsp; |
| 3941 | u16 psm, scid; |
| 3942 | |
| 3943 | if (cmd_len != sizeof(*req)) |
| 3944 | return -EPROTO; |
| 3945 | |
| 3946 | if (!enable_hs) |
| 3947 | return -EINVAL; |
| 3948 | |
| 3949 | psm = le16_to_cpu(req->psm); |
| 3950 | scid = le16_to_cpu(req->scid); |
| 3951 | |
| 3952 | BT_DBG("psm %d, scid %d, amp_id %d", psm, scid, req->amp_id); |
| 3953 | |
| 3954 | /* Placeholder: Always reject */ |
| 3955 | rsp.dcid = 0; |
| 3956 | rsp.scid = cpu_to_le16(scid); |
Andrei Emeltchenko | 8ce0c49 | 2012-03-12 12:13:09 +0200 | [diff] [blame] | 3957 | rsp.result = __constant_cpu_to_le16(L2CAP_CR_NO_MEM); |
| 3958 | rsp.status = __constant_cpu_to_le16(L2CAP_CS_NO_INFO); |
Mat Martineau | f94ff6f | 2011-11-02 16:18:32 -0700 | [diff] [blame] | 3959 | |
| 3960 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CREATE_CHAN_RSP, |
| 3961 | sizeof(rsp), &rsp); |
| 3962 | |
| 3963 | return 0; |
| 3964 | } |
| 3965 | |
| 3966 | static inline int l2cap_create_channel_rsp(struct l2cap_conn *conn, |
| 3967 | struct l2cap_cmd_hdr *cmd, void *data) |
| 3968 | { |
| 3969 | BT_DBG("conn %p", conn); |
| 3970 | |
| 3971 | return l2cap_connect_rsp(conn, cmd, data); |
| 3972 | } |
| 3973 | |
Mat Martineau | 8d5a04a | 2011-11-02 16:18:35 -0700 | [diff] [blame] | 3974 | static void l2cap_send_move_chan_rsp(struct l2cap_conn *conn, u8 ident, |
| 3975 | u16 icid, u16 result) |
| 3976 | { |
| 3977 | struct l2cap_move_chan_rsp rsp; |
| 3978 | |
| 3979 | BT_DBG("icid %d, result %d", icid, result); |
| 3980 | |
| 3981 | rsp.icid = cpu_to_le16(icid); |
| 3982 | rsp.result = cpu_to_le16(result); |
| 3983 | |
| 3984 | l2cap_send_cmd(conn, ident, L2CAP_MOVE_CHAN_RSP, sizeof(rsp), &rsp); |
| 3985 | } |
| 3986 | |
| 3987 | static void l2cap_send_move_chan_cfm(struct l2cap_conn *conn, |
| 3988 | struct l2cap_chan *chan, u16 icid, u16 result) |
| 3989 | { |
| 3990 | struct l2cap_move_chan_cfm cfm; |
| 3991 | u8 ident; |
| 3992 | |
| 3993 | BT_DBG("icid %d, result %d", icid, result); |
| 3994 | |
| 3995 | ident = l2cap_get_ident(conn); |
| 3996 | if (chan) |
| 3997 | chan->ident = ident; |
| 3998 | |
| 3999 | cfm.icid = cpu_to_le16(icid); |
| 4000 | cfm.result = cpu_to_le16(result); |
| 4001 | |
| 4002 | l2cap_send_cmd(conn, ident, L2CAP_MOVE_CHAN_CFM, sizeof(cfm), &cfm); |
| 4003 | } |
| 4004 | |
| 4005 | static void l2cap_send_move_chan_cfm_rsp(struct l2cap_conn *conn, u8 ident, |
| 4006 | u16 icid) |
| 4007 | { |
| 4008 | struct l2cap_move_chan_cfm_rsp rsp; |
| 4009 | |
| 4010 | BT_DBG("icid %d", icid); |
| 4011 | |
| 4012 | rsp.icid = cpu_to_le16(icid); |
| 4013 | l2cap_send_cmd(conn, ident, L2CAP_MOVE_CHAN_CFM_RSP, sizeof(rsp), &rsp); |
| 4014 | } |
| 4015 | |
| 4016 | static inline int l2cap_move_channel_req(struct l2cap_conn *conn, |
| 4017 | struct l2cap_cmd_hdr *cmd, u16 cmd_len, void *data) |
| 4018 | { |
| 4019 | struct l2cap_move_chan_req *req = data; |
| 4020 | u16 icid = 0; |
| 4021 | u16 result = L2CAP_MR_NOT_ALLOWED; |
| 4022 | |
| 4023 | if (cmd_len != sizeof(*req)) |
| 4024 | return -EPROTO; |
| 4025 | |
| 4026 | icid = le16_to_cpu(req->icid); |
| 4027 | |
| 4028 | BT_DBG("icid %d, dest_amp_id %d", icid, req->dest_amp_id); |
| 4029 | |
| 4030 | if (!enable_hs) |
| 4031 | return -EINVAL; |
| 4032 | |
| 4033 | /* Placeholder: Always refuse */ |
| 4034 | l2cap_send_move_chan_rsp(conn, cmd->ident, icid, result); |
| 4035 | |
| 4036 | return 0; |
| 4037 | } |
| 4038 | |
| 4039 | static inline int l2cap_move_channel_rsp(struct l2cap_conn *conn, |
| 4040 | struct l2cap_cmd_hdr *cmd, u16 cmd_len, void *data) |
| 4041 | { |
| 4042 | struct l2cap_move_chan_rsp *rsp = data; |
| 4043 | u16 icid, result; |
| 4044 | |
| 4045 | if (cmd_len != sizeof(*rsp)) |
| 4046 | return -EPROTO; |
| 4047 | |
| 4048 | icid = le16_to_cpu(rsp->icid); |
| 4049 | result = le16_to_cpu(rsp->result); |
| 4050 | |
| 4051 | BT_DBG("icid %d, result %d", icid, result); |
| 4052 | |
| 4053 | /* Placeholder: Always unconfirmed */ |
| 4054 | l2cap_send_move_chan_cfm(conn, NULL, icid, L2CAP_MC_UNCONFIRMED); |
| 4055 | |
| 4056 | return 0; |
| 4057 | } |
| 4058 | |
| 4059 | static inline int l2cap_move_channel_confirm(struct l2cap_conn *conn, |
| 4060 | struct l2cap_cmd_hdr *cmd, u16 cmd_len, void *data) |
| 4061 | { |
| 4062 | struct l2cap_move_chan_cfm *cfm = data; |
| 4063 | u16 icid, result; |
| 4064 | |
| 4065 | if (cmd_len != sizeof(*cfm)) |
| 4066 | return -EPROTO; |
| 4067 | |
| 4068 | icid = le16_to_cpu(cfm->icid); |
| 4069 | result = le16_to_cpu(cfm->result); |
| 4070 | |
| 4071 | BT_DBG("icid %d, result %d", icid, result); |
| 4072 | |
| 4073 | l2cap_send_move_chan_cfm_rsp(conn, cmd->ident, icid); |
| 4074 | |
| 4075 | return 0; |
| 4076 | } |
| 4077 | |
| 4078 | static inline int l2cap_move_channel_confirm_rsp(struct l2cap_conn *conn, |
| 4079 | struct l2cap_cmd_hdr *cmd, u16 cmd_len, void *data) |
| 4080 | { |
| 4081 | struct l2cap_move_chan_cfm_rsp *rsp = data; |
| 4082 | u16 icid; |
| 4083 | |
| 4084 | if (cmd_len != sizeof(*rsp)) |
| 4085 | return -EPROTO; |
| 4086 | |
| 4087 | icid = le16_to_cpu(rsp->icid); |
| 4088 | |
| 4089 | BT_DBG("icid %d", icid); |
| 4090 | |
| 4091 | return 0; |
| 4092 | } |
| 4093 | |
Gustavo F. Padovan | e2174ca | 2011-02-17 19:16:55 -0300 | [diff] [blame] | 4094 | 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] | 4095 | u16 to_multiplier) |
| 4096 | { |
| 4097 | u16 max_latency; |
| 4098 | |
| 4099 | if (min > max || min < 6 || max > 3200) |
| 4100 | return -EINVAL; |
| 4101 | |
| 4102 | if (to_multiplier < 10 || to_multiplier > 3200) |
| 4103 | return -EINVAL; |
| 4104 | |
| 4105 | if (max >= to_multiplier * 8) |
| 4106 | return -EINVAL; |
| 4107 | |
| 4108 | max_latency = (to_multiplier * 8 / max) - 1; |
| 4109 | if (latency > 499 || latency > max_latency) |
| 4110 | return -EINVAL; |
| 4111 | |
| 4112 | return 0; |
| 4113 | } |
| 4114 | |
| 4115 | static inline int l2cap_conn_param_update_req(struct l2cap_conn *conn, |
| 4116 | struct l2cap_cmd_hdr *cmd, u8 *data) |
| 4117 | { |
| 4118 | struct hci_conn *hcon = conn->hcon; |
| 4119 | struct l2cap_conn_param_update_req *req; |
| 4120 | struct l2cap_conn_param_update_rsp rsp; |
| 4121 | u16 min, max, latency, to_multiplier, cmd_len; |
Claudio Takahasi | 2ce603e | 2011-02-16 20:44:53 -0200 | [diff] [blame] | 4122 | int err; |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 4123 | |
| 4124 | if (!(hcon->link_mode & HCI_LM_MASTER)) |
| 4125 | return -EINVAL; |
| 4126 | |
| 4127 | cmd_len = __le16_to_cpu(cmd->len); |
| 4128 | if (cmd_len != sizeof(struct l2cap_conn_param_update_req)) |
| 4129 | return -EPROTO; |
| 4130 | |
| 4131 | req = (struct l2cap_conn_param_update_req *) data; |
Gustavo F. Padovan | e2174ca | 2011-02-17 19:16:55 -0300 | [diff] [blame] | 4132 | min = __le16_to_cpu(req->min); |
| 4133 | max = __le16_to_cpu(req->max); |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 4134 | latency = __le16_to_cpu(req->latency); |
| 4135 | to_multiplier = __le16_to_cpu(req->to_multiplier); |
| 4136 | |
| 4137 | BT_DBG("min 0x%4.4x max 0x%4.4x latency: 0x%4.4x Timeout: 0x%4.4x", |
| 4138 | min, max, latency, to_multiplier); |
| 4139 | |
| 4140 | memset(&rsp, 0, sizeof(rsp)); |
Claudio Takahasi | 2ce603e | 2011-02-16 20:44:53 -0200 | [diff] [blame] | 4141 | |
| 4142 | err = l2cap_check_conn_param(min, max, latency, to_multiplier); |
| 4143 | if (err) |
Andrei Emeltchenko | ac73498 | 2012-05-24 15:42:51 +0300 | [diff] [blame] | 4144 | rsp.result = __constant_cpu_to_le16(L2CAP_CONN_PARAM_REJECTED); |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 4145 | else |
Andrei Emeltchenko | ac73498 | 2012-05-24 15:42:51 +0300 | [diff] [blame] | 4146 | rsp.result = __constant_cpu_to_le16(L2CAP_CONN_PARAM_ACCEPTED); |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 4147 | |
| 4148 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_PARAM_UPDATE_RSP, |
| 4149 | sizeof(rsp), &rsp); |
| 4150 | |
Claudio Takahasi | 2ce603e | 2011-02-16 20:44:53 -0200 | [diff] [blame] | 4151 | if (!err) |
| 4152 | hci_le_conn_update(hcon, min, max, latency, to_multiplier); |
| 4153 | |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 4154 | return 0; |
| 4155 | } |
| 4156 | |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 4157 | static inline int l2cap_bredr_sig_cmd(struct l2cap_conn *conn, |
| 4158 | struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data) |
| 4159 | { |
| 4160 | int err = 0; |
| 4161 | |
| 4162 | switch (cmd->code) { |
| 4163 | case L2CAP_COMMAND_REJ: |
| 4164 | l2cap_command_rej(conn, cmd, data); |
| 4165 | break; |
| 4166 | |
| 4167 | case L2CAP_CONN_REQ: |
| 4168 | err = l2cap_connect_req(conn, cmd, data); |
| 4169 | break; |
| 4170 | |
| 4171 | case L2CAP_CONN_RSP: |
| 4172 | err = l2cap_connect_rsp(conn, cmd, data); |
| 4173 | break; |
| 4174 | |
| 4175 | case L2CAP_CONF_REQ: |
| 4176 | err = l2cap_config_req(conn, cmd, cmd_len, data); |
| 4177 | break; |
| 4178 | |
| 4179 | case L2CAP_CONF_RSP: |
| 4180 | err = l2cap_config_rsp(conn, cmd, data); |
| 4181 | break; |
| 4182 | |
| 4183 | case L2CAP_DISCONN_REQ: |
| 4184 | err = l2cap_disconnect_req(conn, cmd, data); |
| 4185 | break; |
| 4186 | |
| 4187 | case L2CAP_DISCONN_RSP: |
| 4188 | err = l2cap_disconnect_rsp(conn, cmd, data); |
| 4189 | break; |
| 4190 | |
| 4191 | case L2CAP_ECHO_REQ: |
| 4192 | l2cap_send_cmd(conn, cmd->ident, L2CAP_ECHO_RSP, cmd_len, data); |
| 4193 | break; |
| 4194 | |
| 4195 | case L2CAP_ECHO_RSP: |
| 4196 | break; |
| 4197 | |
| 4198 | case L2CAP_INFO_REQ: |
| 4199 | err = l2cap_information_req(conn, cmd, data); |
| 4200 | break; |
| 4201 | |
| 4202 | case L2CAP_INFO_RSP: |
| 4203 | err = l2cap_information_rsp(conn, cmd, data); |
| 4204 | break; |
| 4205 | |
Mat Martineau | f94ff6f | 2011-11-02 16:18:32 -0700 | [diff] [blame] | 4206 | case L2CAP_CREATE_CHAN_REQ: |
| 4207 | err = l2cap_create_channel_req(conn, cmd, cmd_len, data); |
| 4208 | break; |
| 4209 | |
| 4210 | case L2CAP_CREATE_CHAN_RSP: |
| 4211 | err = l2cap_create_channel_rsp(conn, cmd, data); |
| 4212 | break; |
| 4213 | |
Mat Martineau | 8d5a04a | 2011-11-02 16:18:35 -0700 | [diff] [blame] | 4214 | case L2CAP_MOVE_CHAN_REQ: |
| 4215 | err = l2cap_move_channel_req(conn, cmd, cmd_len, data); |
| 4216 | break; |
| 4217 | |
| 4218 | case L2CAP_MOVE_CHAN_RSP: |
| 4219 | err = l2cap_move_channel_rsp(conn, cmd, cmd_len, data); |
| 4220 | break; |
| 4221 | |
| 4222 | case L2CAP_MOVE_CHAN_CFM: |
| 4223 | err = l2cap_move_channel_confirm(conn, cmd, cmd_len, data); |
| 4224 | break; |
| 4225 | |
| 4226 | case L2CAP_MOVE_CHAN_CFM_RSP: |
| 4227 | err = l2cap_move_channel_confirm_rsp(conn, cmd, cmd_len, data); |
| 4228 | break; |
| 4229 | |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 4230 | default: |
| 4231 | BT_ERR("Unknown BR/EDR signaling command 0x%2.2x", cmd->code); |
| 4232 | err = -EINVAL; |
| 4233 | break; |
| 4234 | } |
| 4235 | |
| 4236 | return err; |
| 4237 | } |
| 4238 | |
| 4239 | static inline int l2cap_le_sig_cmd(struct l2cap_conn *conn, |
| 4240 | struct l2cap_cmd_hdr *cmd, u8 *data) |
| 4241 | { |
| 4242 | switch (cmd->code) { |
| 4243 | case L2CAP_COMMAND_REJ: |
| 4244 | return 0; |
| 4245 | |
| 4246 | case L2CAP_CONN_PARAM_UPDATE_REQ: |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 4247 | return l2cap_conn_param_update_req(conn, cmd, data); |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 4248 | |
| 4249 | case L2CAP_CONN_PARAM_UPDATE_RSP: |
| 4250 | return 0; |
| 4251 | |
| 4252 | default: |
| 4253 | BT_ERR("Unknown LE signaling command 0x%2.2x", cmd->code); |
| 4254 | return -EINVAL; |
| 4255 | } |
| 4256 | } |
| 4257 | |
| 4258 | static inline void l2cap_sig_channel(struct l2cap_conn *conn, |
| 4259 | struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4260 | { |
| 4261 | u8 *data = skb->data; |
| 4262 | int len = skb->len; |
| 4263 | struct l2cap_cmd_hdr cmd; |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 4264 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4265 | |
| 4266 | l2cap_raw_recv(conn, skb); |
| 4267 | |
| 4268 | while (len >= L2CAP_CMD_HDR_SIZE) { |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 4269 | u16 cmd_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4270 | memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); |
| 4271 | data += L2CAP_CMD_HDR_SIZE; |
| 4272 | len -= L2CAP_CMD_HDR_SIZE; |
| 4273 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 4274 | cmd_len = le16_to_cpu(cmd.len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4275 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 4276 | 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] | 4277 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 4278 | if (cmd_len > len || !cmd.ident) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4279 | BT_DBG("corrupted command"); |
| 4280 | break; |
| 4281 | } |
| 4282 | |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 4283 | if (conn->hcon->type == LE_LINK) |
| 4284 | err = l2cap_le_sig_cmd(conn, &cmd, data); |
| 4285 | else |
| 4286 | err = l2cap_bredr_sig_cmd(conn, &cmd, cmd_len, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4287 | |
| 4288 | if (err) { |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 4289 | struct l2cap_cmd_rej_unk rej; |
Gustavo F. Padovan | 2c6d1a2 | 2011-03-23 14:38:32 -0300 | [diff] [blame] | 4290 | |
| 4291 | BT_ERR("Wrong link type (%d)", err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4292 | |
| 4293 | /* FIXME: Map err to a valid reason */ |
Andrei Emeltchenko | ac73498 | 2012-05-24 15:42:51 +0300 | [diff] [blame] | 4294 | rej.reason = __constant_cpu_to_le16(L2CAP_REJ_NOT_UNDERSTOOD); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4295 | l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); |
| 4296 | } |
| 4297 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 4298 | data += cmd_len; |
| 4299 | len -= cmd_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4300 | } |
| 4301 | |
| 4302 | kfree_skb(skb); |
| 4303 | } |
| 4304 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 4305 | 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] | 4306 | { |
| 4307 | u16 our_fcs, rcv_fcs; |
Andrei Emeltchenko | e4ca6d9 | 2011-10-11 13:37:52 +0300 | [diff] [blame] | 4308 | int hdr_size; |
| 4309 | |
| 4310 | if (test_bit(FLAG_EXT_CTRL, &chan->flags)) |
| 4311 | hdr_size = L2CAP_EXT_HDR_SIZE; |
| 4312 | else |
| 4313 | hdr_size = L2CAP_ENH_HDR_SIZE; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 4314 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 4315 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 4316 | skb_trim(skb, skb->len - L2CAP_FCS_SIZE); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 4317 | rcv_fcs = get_unaligned_le16(skb->data + skb->len); |
| 4318 | our_fcs = crc16(0, skb->data - hdr_size, skb->len + hdr_size); |
| 4319 | |
| 4320 | if (our_fcs != rcv_fcs) |
João Paulo Rechi Vita | 7a560e5 | 2010-06-22 13:56:27 -0300 | [diff] [blame] | 4321 | return -EBADMSG; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 4322 | } |
| 4323 | return 0; |
| 4324 | } |
| 4325 | |
Mat Martineau | 6ea0048 | 2012-05-17 20:53:52 -0700 | [diff] [blame] | 4326 | static 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] | 4327 | { |
Mat Martineau | e31f763 | 2012-05-17 20:53:41 -0700 | [diff] [blame] | 4328 | struct l2cap_ctrl control; |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 4329 | |
Mat Martineau | e31f763 | 2012-05-17 20:53:41 -0700 | [diff] [blame] | 4330 | BT_DBG("chan %p", chan); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 4331 | |
Mat Martineau | e31f763 | 2012-05-17 20:53:41 -0700 | [diff] [blame] | 4332 | memset(&control, 0, sizeof(control)); |
| 4333 | control.sframe = 1; |
| 4334 | control.final = 1; |
| 4335 | control.reqseq = chan->buffer_seq; |
| 4336 | set_bit(CONN_SEND_FBIT, &chan->conn_state); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 4337 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4338 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
Mat Martineau | e31f763 | 2012-05-17 20:53:41 -0700 | [diff] [blame] | 4339 | control.super = L2CAP_SUPER_RNR; |
| 4340 | l2cap_send_sframe(chan, &control); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 4341 | } |
| 4342 | |
Mat Martineau | e31f763 | 2012-05-17 20:53:41 -0700 | [diff] [blame] | 4343 | if (test_and_clear_bit(CONN_REMOTE_BUSY, &chan->conn_state) && |
| 4344 | chan->unacked_frames > 0) |
| 4345 | __set_retrans_timer(chan); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 4346 | |
Mat Martineau | e31f763 | 2012-05-17 20:53:41 -0700 | [diff] [blame] | 4347 | /* Send pending iframes */ |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 4348 | l2cap_ertm_send(chan); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 4349 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 4350 | if (!test_bit(CONN_LOCAL_BUSY, &chan->conn_state) && |
Mat Martineau | e31f763 | 2012-05-17 20:53:41 -0700 | [diff] [blame] | 4351 | test_bit(CONN_SEND_FBIT, &chan->conn_state)) { |
| 4352 | /* F-bit wasn't sent in an s-frame or i-frame yet, so |
| 4353 | * send it now. |
| 4354 | */ |
| 4355 | control.super = L2CAP_SUPER_RR; |
| 4356 | l2cap_send_sframe(chan, &control); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 4357 | } |
| 4358 | } |
| 4359 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4360 | static void append_skb_frag(struct sk_buff *skb, |
| 4361 | struct sk_buff *new_frag, struct sk_buff **last_frag) |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4362 | { |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4363 | /* skb->len reflects data in skb as well as all fragments |
| 4364 | * skb->data_len reflects only data in fragments |
| 4365 | */ |
| 4366 | if (!skb_has_frag_list(skb)) |
| 4367 | skb_shinfo(skb)->frag_list = new_frag; |
| 4368 | |
| 4369 | new_frag->next = NULL; |
| 4370 | |
| 4371 | (*last_frag)->next = new_frag; |
| 4372 | *last_frag = new_frag; |
| 4373 | |
| 4374 | skb->len += new_frag->len; |
| 4375 | skb->data_len += new_frag->len; |
| 4376 | skb->truesize += new_frag->truesize; |
| 4377 | } |
| 4378 | |
Mat Martineau | 4b51dae9 | 2012-05-17 20:53:37 -0700 | [diff] [blame] | 4379 | static int l2cap_reassemble_sdu(struct l2cap_chan *chan, struct sk_buff *skb, |
| 4380 | struct l2cap_ctrl *control) |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4381 | { |
| 4382 | int err = -EINVAL; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4383 | |
Mat Martineau | 4b51dae9 | 2012-05-17 20:53:37 -0700 | [diff] [blame] | 4384 | switch (control->sar) { |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 4385 | case L2CAP_SAR_UNSEGMENTED: |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4386 | if (chan->sdu) |
| 4387 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4388 | |
Gustavo Padovan | 80b9802 | 2012-05-27 22:27:51 -0300 | [diff] [blame] | 4389 | err = chan->ops->recv(chan, skb); |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4390 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4391 | |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 4392 | case L2CAP_SAR_START: |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4393 | if (chan->sdu) |
| 4394 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4395 | |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 4396 | chan->sdu_len = get_unaligned_le16(skb->data); |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 4397 | skb_pull(skb, L2CAP_SDULEN_SIZE); |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4398 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4399 | if (chan->sdu_len > chan->imtu) { |
| 4400 | err = -EMSGSIZE; |
| 4401 | break; |
| 4402 | } |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4403 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4404 | if (skb->len >= chan->sdu_len) |
| 4405 | break; |
| 4406 | |
| 4407 | chan->sdu = skb; |
| 4408 | chan->sdu_last_frag = skb; |
| 4409 | |
| 4410 | skb = NULL; |
| 4411 | err = 0; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4412 | break; |
| 4413 | |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 4414 | case L2CAP_SAR_CONTINUE: |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 4415 | if (!chan->sdu) |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4416 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4417 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4418 | append_skb_frag(chan->sdu, skb, |
| 4419 | &chan->sdu_last_frag); |
| 4420 | skb = NULL; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4421 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4422 | if (chan->sdu->len >= chan->sdu_len) |
| 4423 | break; |
Gustavo F. Padovan | 4178ba4 | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 4424 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4425 | err = 0; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4426 | break; |
| 4427 | |
Andrei Emeltchenko | 7e0ef6e | 2011-10-11 13:37:45 +0300 | [diff] [blame] | 4428 | case L2CAP_SAR_END: |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 4429 | if (!chan->sdu) |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4430 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4431 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4432 | append_skb_frag(chan->sdu, skb, |
| 4433 | &chan->sdu_last_frag); |
| 4434 | skb = NULL; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4435 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4436 | if (chan->sdu->len != chan->sdu_len) |
| 4437 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4438 | |
Gustavo Padovan | 80b9802 | 2012-05-27 22:27:51 -0300 | [diff] [blame] | 4439 | err = chan->ops->recv(chan, chan->sdu); |
Gustavo F. Padovan | 4178ba4 | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 4440 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4441 | if (!err) { |
| 4442 | /* Reassembly complete */ |
| 4443 | chan->sdu = NULL; |
| 4444 | chan->sdu_last_frag = NULL; |
| 4445 | chan->sdu_len = 0; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4446 | } |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4447 | break; |
| 4448 | } |
| 4449 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4450 | if (err) { |
| 4451 | kfree_skb(skb); |
| 4452 | kfree_skb(chan->sdu); |
| 4453 | chan->sdu = NULL; |
| 4454 | chan->sdu_last_frag = NULL; |
| 4455 | chan->sdu_len = 0; |
| 4456 | } |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4457 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 4458 | return err; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4459 | } |
| 4460 | |
Mat Martineau | e328140 | 2011-07-07 09:39:02 -0700 | [diff] [blame] | 4461 | void l2cap_chan_busy(struct l2cap_chan *chan, int busy) |
Gustavo F. Padovan | 712132e | 2010-06-21 19:39:50 -0300 | [diff] [blame] | 4462 | { |
Mat Martineau | 61aa4f5 | 2012-05-17 20:53:40 -0700 | [diff] [blame] | 4463 | u8 event; |
| 4464 | |
| 4465 | if (chan->mode != L2CAP_MODE_ERTM) |
| 4466 | return; |
| 4467 | |
| 4468 | event = busy ? L2CAP_EV_LOCAL_BUSY_DETECTED : L2CAP_EV_LOCAL_BUSY_CLEAR; |
Andrei Emeltchenko | 401bb1f | 2012-05-21 15:47:46 +0300 | [diff] [blame] | 4469 | l2cap_tx(chan, NULL, NULL, event); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4470 | } |
| 4471 | |
Mat Martineau | d2a7ac5 | 2012-05-17 20:53:42 -0700 | [diff] [blame] | 4472 | static int l2cap_rx_queued_iframes(struct l2cap_chan *chan) |
| 4473 | { |
Mat Martineau | 6383872 | 2012-05-17 20:53:45 -0700 | [diff] [blame] | 4474 | int err = 0; |
| 4475 | /* Pass sequential frames to l2cap_reassemble_sdu() |
| 4476 | * until a gap is encountered. |
| 4477 | */ |
| 4478 | |
| 4479 | BT_DBG("chan %p", chan); |
| 4480 | |
| 4481 | while (!test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
| 4482 | struct sk_buff *skb; |
| 4483 | BT_DBG("Searching for skb with txseq %d (queue len %d)", |
| 4484 | chan->buffer_seq, skb_queue_len(&chan->srej_q)); |
| 4485 | |
| 4486 | skb = l2cap_ertm_seq_in_queue(&chan->srej_q, chan->buffer_seq); |
| 4487 | |
| 4488 | if (!skb) |
| 4489 | break; |
| 4490 | |
| 4491 | skb_unlink(skb, &chan->srej_q); |
| 4492 | chan->buffer_seq = __next_seq(chan, chan->buffer_seq); |
| 4493 | err = l2cap_reassemble_sdu(chan, skb, &bt_cb(skb)->control); |
| 4494 | if (err) |
| 4495 | break; |
| 4496 | } |
| 4497 | |
| 4498 | if (skb_queue_empty(&chan->srej_q)) { |
| 4499 | chan->rx_state = L2CAP_RX_STATE_RECV; |
| 4500 | l2cap_send_ack(chan); |
| 4501 | } |
| 4502 | |
| 4503 | return err; |
Mat Martineau | d2a7ac5 | 2012-05-17 20:53:42 -0700 | [diff] [blame] | 4504 | } |
| 4505 | |
| 4506 | static void l2cap_handle_srej(struct l2cap_chan *chan, |
| 4507 | struct l2cap_ctrl *control) |
| 4508 | { |
Mat Martineau | f80842a | 2012-05-17 20:53:46 -0700 | [diff] [blame] | 4509 | struct sk_buff *skb; |
| 4510 | |
| 4511 | BT_DBG("chan %p, control %p", chan, control); |
| 4512 | |
| 4513 | if (control->reqseq == chan->next_tx_seq) { |
| 4514 | BT_DBG("Invalid reqseq %d, disconnecting", control->reqseq); |
| 4515 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
| 4516 | return; |
| 4517 | } |
| 4518 | |
| 4519 | skb = l2cap_ertm_seq_in_queue(&chan->tx_q, control->reqseq); |
| 4520 | |
| 4521 | if (skb == NULL) { |
| 4522 | BT_DBG("Seq %d not available for retransmission", |
| 4523 | control->reqseq); |
| 4524 | return; |
| 4525 | } |
| 4526 | |
| 4527 | if (chan->max_tx != 0 && bt_cb(skb)->control.retries >= chan->max_tx) { |
| 4528 | BT_DBG("Retry limit exceeded (%d)", chan->max_tx); |
| 4529 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
| 4530 | return; |
| 4531 | } |
| 4532 | |
| 4533 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
| 4534 | |
| 4535 | if (control->poll) { |
| 4536 | l2cap_pass_to_tx(chan, control); |
| 4537 | |
| 4538 | set_bit(CONN_SEND_FBIT, &chan->conn_state); |
| 4539 | l2cap_retransmit(chan, control); |
| 4540 | l2cap_ertm_send(chan); |
| 4541 | |
| 4542 | if (chan->tx_state == L2CAP_TX_STATE_WAIT_F) { |
| 4543 | set_bit(CONN_SREJ_ACT, &chan->conn_state); |
| 4544 | chan->srej_save_reqseq = control->reqseq; |
| 4545 | } |
| 4546 | } else { |
| 4547 | l2cap_pass_to_tx_fbit(chan, control); |
| 4548 | |
| 4549 | if (control->final) { |
| 4550 | if (chan->srej_save_reqseq != control->reqseq || |
| 4551 | !test_and_clear_bit(CONN_SREJ_ACT, |
| 4552 | &chan->conn_state)) |
| 4553 | l2cap_retransmit(chan, control); |
| 4554 | } else { |
| 4555 | l2cap_retransmit(chan, control); |
| 4556 | if (chan->tx_state == L2CAP_TX_STATE_WAIT_F) { |
| 4557 | set_bit(CONN_SREJ_ACT, &chan->conn_state); |
| 4558 | chan->srej_save_reqseq = control->reqseq; |
| 4559 | } |
| 4560 | } |
| 4561 | } |
Mat Martineau | d2a7ac5 | 2012-05-17 20:53:42 -0700 | [diff] [blame] | 4562 | } |
| 4563 | |
| 4564 | static void l2cap_handle_rej(struct l2cap_chan *chan, |
| 4565 | struct l2cap_ctrl *control) |
| 4566 | { |
Mat Martineau | fcd289d | 2012-05-17 20:53:47 -0700 | [diff] [blame] | 4567 | struct sk_buff *skb; |
| 4568 | |
| 4569 | BT_DBG("chan %p, control %p", chan, control); |
| 4570 | |
| 4571 | if (control->reqseq == chan->next_tx_seq) { |
| 4572 | BT_DBG("Invalid reqseq %d, disconnecting", control->reqseq); |
| 4573 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
| 4574 | return; |
| 4575 | } |
| 4576 | |
| 4577 | skb = l2cap_ertm_seq_in_queue(&chan->tx_q, control->reqseq); |
| 4578 | |
| 4579 | if (chan->max_tx && skb && |
| 4580 | bt_cb(skb)->control.retries >= chan->max_tx) { |
| 4581 | BT_DBG("Retry limit exceeded (%d)", chan->max_tx); |
| 4582 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
| 4583 | return; |
| 4584 | } |
| 4585 | |
| 4586 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
| 4587 | |
| 4588 | l2cap_pass_to_tx(chan, control); |
| 4589 | |
| 4590 | if (control->final) { |
| 4591 | if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state)) |
| 4592 | l2cap_retransmit_all(chan, control); |
| 4593 | } else { |
| 4594 | l2cap_retransmit_all(chan, control); |
| 4595 | l2cap_ertm_send(chan); |
| 4596 | if (chan->tx_state == L2CAP_TX_STATE_WAIT_F) |
| 4597 | set_bit(CONN_REJ_ACT, &chan->conn_state); |
| 4598 | } |
Mat Martineau | d2a7ac5 | 2012-05-17 20:53:42 -0700 | [diff] [blame] | 4599 | } |
| 4600 | |
Mat Martineau | 4b51dae9 | 2012-05-17 20:53:37 -0700 | [diff] [blame] | 4601 | static u8 l2cap_classify_txseq(struct l2cap_chan *chan, u16 txseq) |
| 4602 | { |
| 4603 | BT_DBG("chan %p, txseq %d", chan, txseq); |
| 4604 | |
| 4605 | BT_DBG("last_acked_seq %d, expected_tx_seq %d", chan->last_acked_seq, |
| 4606 | chan->expected_tx_seq); |
| 4607 | |
| 4608 | if (chan->rx_state == L2CAP_RX_STATE_SREJ_SENT) { |
| 4609 | if (__seq_offset(chan, txseq, chan->last_acked_seq) >= |
| 4610 | chan->tx_win) { |
| 4611 | /* See notes below regarding "double poll" and |
| 4612 | * invalid packets. |
| 4613 | */ |
| 4614 | if (chan->tx_win <= ((chan->tx_win_max + 1) >> 1)) { |
| 4615 | BT_DBG("Invalid/Ignore - after SREJ"); |
| 4616 | return L2CAP_TXSEQ_INVALID_IGNORE; |
| 4617 | } else { |
| 4618 | BT_DBG("Invalid - in window after SREJ sent"); |
| 4619 | return L2CAP_TXSEQ_INVALID; |
| 4620 | } |
| 4621 | } |
| 4622 | |
| 4623 | if (chan->srej_list.head == txseq) { |
| 4624 | BT_DBG("Expected SREJ"); |
| 4625 | return L2CAP_TXSEQ_EXPECTED_SREJ; |
| 4626 | } |
| 4627 | |
| 4628 | if (l2cap_ertm_seq_in_queue(&chan->srej_q, txseq)) { |
| 4629 | BT_DBG("Duplicate SREJ - txseq already stored"); |
| 4630 | return L2CAP_TXSEQ_DUPLICATE_SREJ; |
| 4631 | } |
| 4632 | |
| 4633 | if (l2cap_seq_list_contains(&chan->srej_list, txseq)) { |
| 4634 | BT_DBG("Unexpected SREJ - not requested"); |
| 4635 | return L2CAP_TXSEQ_UNEXPECTED_SREJ; |
| 4636 | } |
| 4637 | } |
| 4638 | |
| 4639 | if (chan->expected_tx_seq == txseq) { |
| 4640 | if (__seq_offset(chan, txseq, chan->last_acked_seq) >= |
| 4641 | chan->tx_win) { |
| 4642 | BT_DBG("Invalid - txseq outside tx window"); |
| 4643 | return L2CAP_TXSEQ_INVALID; |
| 4644 | } else { |
| 4645 | BT_DBG("Expected"); |
| 4646 | return L2CAP_TXSEQ_EXPECTED; |
| 4647 | } |
| 4648 | } |
| 4649 | |
| 4650 | if (__seq_offset(chan, txseq, chan->last_acked_seq) < |
| 4651 | __seq_offset(chan, chan->expected_tx_seq, |
| 4652 | chan->last_acked_seq)){ |
| 4653 | BT_DBG("Duplicate - expected_tx_seq later than txseq"); |
| 4654 | return L2CAP_TXSEQ_DUPLICATE; |
| 4655 | } |
| 4656 | |
| 4657 | if (__seq_offset(chan, txseq, chan->last_acked_seq) >= chan->tx_win) { |
| 4658 | /* A source of invalid packets is a "double poll" condition, |
| 4659 | * where delays cause us to send multiple poll packets. If |
| 4660 | * the remote stack receives and processes both polls, |
| 4661 | * sequence numbers can wrap around in such a way that a |
| 4662 | * resent frame has a sequence number that looks like new data |
| 4663 | * with a sequence gap. This would trigger an erroneous SREJ |
| 4664 | * request. |
| 4665 | * |
| 4666 | * Fortunately, this is impossible with a tx window that's |
| 4667 | * less than half of the maximum sequence number, which allows |
| 4668 | * invalid frames to be safely ignored. |
| 4669 | * |
| 4670 | * With tx window sizes greater than half of the tx window |
| 4671 | * maximum, the frame is invalid and cannot be ignored. This |
| 4672 | * causes a disconnect. |
| 4673 | */ |
| 4674 | |
| 4675 | if (chan->tx_win <= ((chan->tx_win_max + 1) >> 1)) { |
| 4676 | BT_DBG("Invalid/Ignore - txseq outside tx window"); |
| 4677 | return L2CAP_TXSEQ_INVALID_IGNORE; |
| 4678 | } else { |
| 4679 | BT_DBG("Invalid - txseq outside tx window"); |
| 4680 | return L2CAP_TXSEQ_INVALID; |
| 4681 | } |
| 4682 | } else { |
| 4683 | BT_DBG("Unexpected - txseq indicates missing frames"); |
| 4684 | return L2CAP_TXSEQ_UNEXPECTED; |
| 4685 | } |
| 4686 | } |
| 4687 | |
Mat Martineau | d2a7ac5 | 2012-05-17 20:53:42 -0700 | [diff] [blame] | 4688 | static int l2cap_rx_state_recv(struct l2cap_chan *chan, |
| 4689 | struct l2cap_ctrl *control, |
| 4690 | struct sk_buff *skb, u8 event) |
| 4691 | { |
| 4692 | int err = 0; |
| 4693 | bool skb_in_use = 0; |
| 4694 | |
| 4695 | BT_DBG("chan %p, control %p, skb %p, event %d", chan, control, skb, |
| 4696 | event); |
| 4697 | |
| 4698 | switch (event) { |
| 4699 | case L2CAP_EV_RECV_IFRAME: |
| 4700 | switch (l2cap_classify_txseq(chan, control->txseq)) { |
| 4701 | case L2CAP_TXSEQ_EXPECTED: |
| 4702 | l2cap_pass_to_tx(chan, control); |
| 4703 | |
| 4704 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
| 4705 | BT_DBG("Busy, discarding expected seq %d", |
| 4706 | control->txseq); |
| 4707 | break; |
| 4708 | } |
| 4709 | |
| 4710 | chan->expected_tx_seq = __next_seq(chan, |
| 4711 | control->txseq); |
| 4712 | |
| 4713 | chan->buffer_seq = chan->expected_tx_seq; |
| 4714 | skb_in_use = 1; |
| 4715 | |
| 4716 | err = l2cap_reassemble_sdu(chan, skb, control); |
| 4717 | if (err) |
| 4718 | break; |
| 4719 | |
| 4720 | if (control->final) { |
| 4721 | if (!test_and_clear_bit(CONN_REJ_ACT, |
| 4722 | &chan->conn_state)) { |
| 4723 | control->final = 0; |
| 4724 | l2cap_retransmit_all(chan, control); |
| 4725 | l2cap_ertm_send(chan); |
| 4726 | } |
| 4727 | } |
| 4728 | |
| 4729 | if (!test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) |
| 4730 | l2cap_send_ack(chan); |
| 4731 | break; |
| 4732 | case L2CAP_TXSEQ_UNEXPECTED: |
| 4733 | l2cap_pass_to_tx(chan, control); |
| 4734 | |
| 4735 | /* Can't issue SREJ frames in the local busy state. |
| 4736 | * Drop this frame, it will be seen as missing |
| 4737 | * when local busy is exited. |
| 4738 | */ |
| 4739 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
| 4740 | BT_DBG("Busy, discarding unexpected seq %d", |
| 4741 | control->txseq); |
| 4742 | break; |
| 4743 | } |
| 4744 | |
| 4745 | /* There was a gap in the sequence, so an SREJ |
| 4746 | * must be sent for each missing frame. The |
| 4747 | * current frame is stored for later use. |
| 4748 | */ |
| 4749 | skb_queue_tail(&chan->srej_q, skb); |
| 4750 | skb_in_use = 1; |
| 4751 | BT_DBG("Queued %p (queue len %d)", skb, |
| 4752 | skb_queue_len(&chan->srej_q)); |
| 4753 | |
| 4754 | clear_bit(CONN_SREJ_ACT, &chan->conn_state); |
| 4755 | l2cap_seq_list_clear(&chan->srej_list); |
| 4756 | l2cap_send_srej(chan, control->txseq); |
| 4757 | |
| 4758 | chan->rx_state = L2CAP_RX_STATE_SREJ_SENT; |
| 4759 | break; |
| 4760 | case L2CAP_TXSEQ_DUPLICATE: |
| 4761 | l2cap_pass_to_tx(chan, control); |
| 4762 | break; |
| 4763 | case L2CAP_TXSEQ_INVALID_IGNORE: |
| 4764 | break; |
| 4765 | case L2CAP_TXSEQ_INVALID: |
| 4766 | default: |
| 4767 | l2cap_send_disconn_req(chan->conn, chan, |
| 4768 | ECONNRESET); |
| 4769 | break; |
| 4770 | } |
| 4771 | break; |
| 4772 | case L2CAP_EV_RECV_RR: |
| 4773 | l2cap_pass_to_tx(chan, control); |
| 4774 | if (control->final) { |
| 4775 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
| 4776 | |
| 4777 | if (!test_and_clear_bit(CONN_REJ_ACT, |
| 4778 | &chan->conn_state)) { |
| 4779 | control->final = 0; |
| 4780 | l2cap_retransmit_all(chan, control); |
| 4781 | } |
| 4782 | |
| 4783 | l2cap_ertm_send(chan); |
| 4784 | } else if (control->poll) { |
| 4785 | l2cap_send_i_or_rr_or_rnr(chan); |
| 4786 | } else { |
| 4787 | if (test_and_clear_bit(CONN_REMOTE_BUSY, |
| 4788 | &chan->conn_state) && |
| 4789 | chan->unacked_frames) |
| 4790 | __set_retrans_timer(chan); |
| 4791 | |
| 4792 | l2cap_ertm_send(chan); |
| 4793 | } |
| 4794 | break; |
| 4795 | case L2CAP_EV_RECV_RNR: |
| 4796 | set_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
| 4797 | l2cap_pass_to_tx(chan, control); |
| 4798 | if (control && control->poll) { |
| 4799 | set_bit(CONN_SEND_FBIT, &chan->conn_state); |
| 4800 | l2cap_send_rr_or_rnr(chan, 0); |
| 4801 | } |
| 4802 | __clear_retrans_timer(chan); |
| 4803 | l2cap_seq_list_clear(&chan->retrans_list); |
| 4804 | break; |
| 4805 | case L2CAP_EV_RECV_REJ: |
| 4806 | l2cap_handle_rej(chan, control); |
| 4807 | break; |
| 4808 | case L2CAP_EV_RECV_SREJ: |
| 4809 | l2cap_handle_srej(chan, control); |
| 4810 | break; |
| 4811 | default: |
| 4812 | break; |
| 4813 | } |
| 4814 | |
| 4815 | if (skb && !skb_in_use) { |
| 4816 | BT_DBG("Freeing %p", skb); |
| 4817 | kfree_skb(skb); |
| 4818 | } |
| 4819 | |
| 4820 | return err; |
| 4821 | } |
| 4822 | |
| 4823 | static int l2cap_rx_state_srej_sent(struct l2cap_chan *chan, |
| 4824 | struct l2cap_ctrl *control, |
| 4825 | struct sk_buff *skb, u8 event) |
| 4826 | { |
| 4827 | int err = 0; |
| 4828 | u16 txseq = control->txseq; |
| 4829 | bool skb_in_use = 0; |
| 4830 | |
| 4831 | BT_DBG("chan %p, control %p, skb %p, event %d", chan, control, skb, |
| 4832 | event); |
| 4833 | |
| 4834 | switch (event) { |
| 4835 | case L2CAP_EV_RECV_IFRAME: |
| 4836 | switch (l2cap_classify_txseq(chan, txseq)) { |
| 4837 | case L2CAP_TXSEQ_EXPECTED: |
| 4838 | /* Keep frame for reassembly later */ |
| 4839 | l2cap_pass_to_tx(chan, control); |
| 4840 | skb_queue_tail(&chan->srej_q, skb); |
| 4841 | skb_in_use = 1; |
| 4842 | BT_DBG("Queued %p (queue len %d)", skb, |
| 4843 | skb_queue_len(&chan->srej_q)); |
| 4844 | |
| 4845 | chan->expected_tx_seq = __next_seq(chan, txseq); |
| 4846 | break; |
| 4847 | case L2CAP_TXSEQ_EXPECTED_SREJ: |
| 4848 | l2cap_seq_list_pop(&chan->srej_list); |
| 4849 | |
| 4850 | l2cap_pass_to_tx(chan, control); |
| 4851 | skb_queue_tail(&chan->srej_q, skb); |
| 4852 | skb_in_use = 1; |
| 4853 | BT_DBG("Queued %p (queue len %d)", skb, |
| 4854 | skb_queue_len(&chan->srej_q)); |
| 4855 | |
| 4856 | err = l2cap_rx_queued_iframes(chan); |
| 4857 | if (err) |
| 4858 | break; |
| 4859 | |
| 4860 | break; |
| 4861 | case L2CAP_TXSEQ_UNEXPECTED: |
| 4862 | /* Got a frame that can't be reassembled yet. |
| 4863 | * Save it for later, and send SREJs to cover |
| 4864 | * the missing frames. |
| 4865 | */ |
| 4866 | skb_queue_tail(&chan->srej_q, skb); |
| 4867 | skb_in_use = 1; |
| 4868 | BT_DBG("Queued %p (queue len %d)", skb, |
| 4869 | skb_queue_len(&chan->srej_q)); |
| 4870 | |
| 4871 | l2cap_pass_to_tx(chan, control); |
| 4872 | l2cap_send_srej(chan, control->txseq); |
| 4873 | break; |
| 4874 | case L2CAP_TXSEQ_UNEXPECTED_SREJ: |
| 4875 | /* This frame was requested with an SREJ, but |
| 4876 | * some expected retransmitted frames are |
| 4877 | * missing. Request retransmission of missing |
| 4878 | * SREJ'd frames. |
| 4879 | */ |
| 4880 | skb_queue_tail(&chan->srej_q, skb); |
| 4881 | skb_in_use = 1; |
| 4882 | BT_DBG("Queued %p (queue len %d)", skb, |
| 4883 | skb_queue_len(&chan->srej_q)); |
| 4884 | |
| 4885 | l2cap_pass_to_tx(chan, control); |
| 4886 | l2cap_send_srej_list(chan, control->txseq); |
| 4887 | break; |
| 4888 | case L2CAP_TXSEQ_DUPLICATE_SREJ: |
| 4889 | /* We've already queued this frame. Drop this copy. */ |
| 4890 | l2cap_pass_to_tx(chan, control); |
| 4891 | break; |
| 4892 | case L2CAP_TXSEQ_DUPLICATE: |
| 4893 | /* Expecting a later sequence number, so this frame |
| 4894 | * was already received. Ignore it completely. |
| 4895 | */ |
| 4896 | break; |
| 4897 | case L2CAP_TXSEQ_INVALID_IGNORE: |
| 4898 | break; |
| 4899 | case L2CAP_TXSEQ_INVALID: |
| 4900 | default: |
| 4901 | l2cap_send_disconn_req(chan->conn, chan, |
| 4902 | ECONNRESET); |
| 4903 | break; |
| 4904 | } |
| 4905 | break; |
| 4906 | case L2CAP_EV_RECV_RR: |
| 4907 | l2cap_pass_to_tx(chan, control); |
| 4908 | if (control->final) { |
| 4909 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
| 4910 | |
| 4911 | if (!test_and_clear_bit(CONN_REJ_ACT, |
| 4912 | &chan->conn_state)) { |
| 4913 | control->final = 0; |
| 4914 | l2cap_retransmit_all(chan, control); |
| 4915 | } |
| 4916 | |
| 4917 | l2cap_ertm_send(chan); |
| 4918 | } else if (control->poll) { |
| 4919 | if (test_and_clear_bit(CONN_REMOTE_BUSY, |
| 4920 | &chan->conn_state) && |
| 4921 | chan->unacked_frames) { |
| 4922 | __set_retrans_timer(chan); |
| 4923 | } |
| 4924 | |
| 4925 | set_bit(CONN_SEND_FBIT, &chan->conn_state); |
| 4926 | l2cap_send_srej_tail(chan); |
| 4927 | } else { |
| 4928 | if (test_and_clear_bit(CONN_REMOTE_BUSY, |
| 4929 | &chan->conn_state) && |
| 4930 | chan->unacked_frames) |
| 4931 | __set_retrans_timer(chan); |
| 4932 | |
| 4933 | l2cap_send_ack(chan); |
| 4934 | } |
| 4935 | break; |
| 4936 | case L2CAP_EV_RECV_RNR: |
| 4937 | set_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
| 4938 | l2cap_pass_to_tx(chan, control); |
| 4939 | if (control->poll) { |
| 4940 | l2cap_send_srej_tail(chan); |
| 4941 | } else { |
| 4942 | struct l2cap_ctrl rr_control; |
| 4943 | memset(&rr_control, 0, sizeof(rr_control)); |
| 4944 | rr_control.sframe = 1; |
| 4945 | rr_control.super = L2CAP_SUPER_RR; |
| 4946 | rr_control.reqseq = chan->buffer_seq; |
| 4947 | l2cap_send_sframe(chan, &rr_control); |
| 4948 | } |
| 4949 | |
| 4950 | break; |
| 4951 | case L2CAP_EV_RECV_REJ: |
| 4952 | l2cap_handle_rej(chan, control); |
| 4953 | break; |
| 4954 | case L2CAP_EV_RECV_SREJ: |
| 4955 | l2cap_handle_srej(chan, control); |
| 4956 | break; |
| 4957 | } |
| 4958 | |
| 4959 | if (skb && !skb_in_use) { |
| 4960 | BT_DBG("Freeing %p", skb); |
| 4961 | kfree_skb(skb); |
| 4962 | } |
| 4963 | |
| 4964 | return err; |
| 4965 | } |
| 4966 | |
| 4967 | static bool __valid_reqseq(struct l2cap_chan *chan, u16 reqseq) |
| 4968 | { |
| 4969 | /* Make sure reqseq is for a packet that has been sent but not acked */ |
| 4970 | u16 unacked; |
| 4971 | |
| 4972 | unacked = __seq_offset(chan, chan->next_tx_seq, chan->expected_ack_seq); |
| 4973 | return __seq_offset(chan, chan->next_tx_seq, reqseq) <= unacked; |
| 4974 | } |
| 4975 | |
Mat Martineau | cec8ab6e | 2012-05-17 20:53:36 -0700 | [diff] [blame] | 4976 | static int l2cap_rx(struct l2cap_chan *chan, struct l2cap_ctrl *control, |
| 4977 | struct sk_buff *skb, u8 event) |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 4978 | { |
Mat Martineau | d2a7ac5 | 2012-05-17 20:53:42 -0700 | [diff] [blame] | 4979 | int err = 0; |
| 4980 | |
| 4981 | BT_DBG("chan %p, control %p, skb %p, event %d, state %d", chan, |
| 4982 | control, skb, event, chan->rx_state); |
| 4983 | |
| 4984 | if (__valid_reqseq(chan, control->reqseq)) { |
| 4985 | switch (chan->rx_state) { |
| 4986 | case L2CAP_RX_STATE_RECV: |
| 4987 | err = l2cap_rx_state_recv(chan, control, skb, event); |
| 4988 | break; |
| 4989 | case L2CAP_RX_STATE_SREJ_SENT: |
| 4990 | err = l2cap_rx_state_srej_sent(chan, control, skb, |
| 4991 | event); |
| 4992 | break; |
| 4993 | default: |
| 4994 | /* shut it down */ |
| 4995 | break; |
| 4996 | } |
| 4997 | } else { |
| 4998 | BT_DBG("Invalid reqseq %d (next_tx_seq %d, expected_ack_seq %d", |
| 4999 | control->reqseq, chan->next_tx_seq, |
| 5000 | chan->expected_ack_seq); |
| 5001 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
| 5002 | } |
| 5003 | |
| 5004 | return err; |
Mat Martineau | cec8ab6e | 2012-05-17 20:53:36 -0700 | [diff] [blame] | 5005 | } |
| 5006 | |
| 5007 | static int l2cap_stream_rx(struct l2cap_chan *chan, struct l2cap_ctrl *control, |
| 5008 | struct sk_buff *skb) |
| 5009 | { |
Mat Martineau | 4b51dae9 | 2012-05-17 20:53:37 -0700 | [diff] [blame] | 5010 | int err = 0; |
| 5011 | |
| 5012 | BT_DBG("chan %p, control %p, skb %p, state %d", chan, control, skb, |
| 5013 | chan->rx_state); |
| 5014 | |
| 5015 | if (l2cap_classify_txseq(chan, control->txseq) == |
| 5016 | L2CAP_TXSEQ_EXPECTED) { |
| 5017 | l2cap_pass_to_tx(chan, control); |
| 5018 | |
| 5019 | BT_DBG("buffer_seq %d->%d", chan->buffer_seq, |
| 5020 | __next_seq(chan, chan->buffer_seq)); |
| 5021 | |
| 5022 | chan->buffer_seq = __next_seq(chan, chan->buffer_seq); |
| 5023 | |
| 5024 | l2cap_reassemble_sdu(chan, skb, control); |
| 5025 | } else { |
| 5026 | if (chan->sdu) { |
| 5027 | kfree_skb(chan->sdu); |
| 5028 | chan->sdu = NULL; |
| 5029 | } |
| 5030 | chan->sdu_last_frag = NULL; |
| 5031 | chan->sdu_len = 0; |
| 5032 | |
| 5033 | if (skb) { |
| 5034 | BT_DBG("Freeing %p", skb); |
| 5035 | kfree_skb(skb); |
| 5036 | } |
| 5037 | } |
| 5038 | |
| 5039 | chan->last_acked_seq = control->txseq; |
| 5040 | chan->expected_tx_seq = __next_seq(chan, control->txseq); |
| 5041 | |
| 5042 | return err; |
Mat Martineau | cec8ab6e | 2012-05-17 20:53:36 -0700 | [diff] [blame] | 5043 | } |
| 5044 | |
| 5045 | static int l2cap_data_rcv(struct l2cap_chan *chan, struct sk_buff *skb) |
| 5046 | { |
| 5047 | struct l2cap_ctrl *control = &bt_cb(skb)->control; |
| 5048 | u16 len; |
| 5049 | u8 event; |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 5050 | |
Mat Martineau | b76bbd6 | 2012-04-11 10:48:43 -0700 | [diff] [blame] | 5051 | __unpack_control(chan, skb); |
| 5052 | |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 5053 | len = skb->len; |
| 5054 | |
| 5055 | /* |
| 5056 | * We can just drop the corrupted I-frame here. |
| 5057 | * Receiver will miss it and start proper recovery |
Mat Martineau | cec8ab6e | 2012-05-17 20:53:36 -0700 | [diff] [blame] | 5058 | * procedures and ask for retransmission. |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 5059 | */ |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 5060 | if (l2cap_check_fcs(chan, skb)) |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 5061 | goto drop; |
| 5062 | |
Mat Martineau | cec8ab6e | 2012-05-17 20:53:36 -0700 | [diff] [blame] | 5063 | if (!control->sframe && control->sar == L2CAP_SAR_START) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 5064 | len -= L2CAP_SDULEN_SIZE; |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 5065 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 5066 | if (chan->fcs == L2CAP_FCS_CRC16) |
Andrei Emeltchenko | 03a5121 | 2011-10-17 12:19:58 +0300 | [diff] [blame] | 5067 | len -= L2CAP_FCS_SIZE; |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 5068 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 5069 | if (len > chan->mps) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 5070 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 5071 | goto drop; |
| 5072 | } |
| 5073 | |
Mat Martineau | cec8ab6e | 2012-05-17 20:53:36 -0700 | [diff] [blame] | 5074 | if (!control->sframe) { |
| 5075 | int err; |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 5076 | |
Mat Martineau | cec8ab6e | 2012-05-17 20:53:36 -0700 | [diff] [blame] | 5077 | BT_DBG("iframe sar %d, reqseq %d, final %d, txseq %d", |
| 5078 | control->sar, control->reqseq, control->final, |
| 5079 | control->txseq); |
Andrei Emeltchenko | 836be93 | 2011-10-17 12:19:57 +0300 | [diff] [blame] | 5080 | |
Mat Martineau | cec8ab6e | 2012-05-17 20:53:36 -0700 | [diff] [blame] | 5081 | /* Validate F-bit - F=0 always valid, F=1 only |
| 5082 | * valid in TX WAIT_F |
| 5083 | */ |
| 5084 | if (control->final && chan->tx_state != L2CAP_TX_STATE_WAIT_F) |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 5085 | goto drop; |
Mat Martineau | cec8ab6e | 2012-05-17 20:53:36 -0700 | [diff] [blame] | 5086 | |
| 5087 | if (chan->mode != L2CAP_MODE_STREAMING) { |
| 5088 | event = L2CAP_EV_RECV_IFRAME; |
| 5089 | err = l2cap_rx(chan, control, skb, event); |
| 5090 | } else { |
| 5091 | err = l2cap_stream_rx(chan, control, skb); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 5092 | } |
| 5093 | |
Mat Martineau | cec8ab6e | 2012-05-17 20:53:36 -0700 | [diff] [blame] | 5094 | if (err) |
| 5095 | l2cap_send_disconn_req(chan->conn, chan, |
| 5096 | ECONNRESET); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 5097 | } else { |
Mat Martineau | cec8ab6e | 2012-05-17 20:53:36 -0700 | [diff] [blame] | 5098 | const u8 rx_func_to_event[4] = { |
| 5099 | L2CAP_EV_RECV_RR, L2CAP_EV_RECV_REJ, |
| 5100 | L2CAP_EV_RECV_RNR, L2CAP_EV_RECV_SREJ |
| 5101 | }; |
| 5102 | |
| 5103 | /* Only I-frames are expected in streaming mode */ |
| 5104 | if (chan->mode == L2CAP_MODE_STREAMING) |
| 5105 | goto drop; |
| 5106 | |
| 5107 | BT_DBG("sframe reqseq %d, final %d, poll %d, super %d", |
| 5108 | control->reqseq, control->final, control->poll, |
| 5109 | control->super); |
| 5110 | |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 5111 | if (len != 0) { |
| 5112 | BT_ERR("%d", len); |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 5113 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 5114 | goto drop; |
| 5115 | } |
| 5116 | |
Mat Martineau | cec8ab6e | 2012-05-17 20:53:36 -0700 | [diff] [blame] | 5117 | /* Validate F and P bits */ |
| 5118 | if (control->final && (control->poll || |
| 5119 | chan->tx_state != L2CAP_TX_STATE_WAIT_F)) |
| 5120 | goto drop; |
| 5121 | |
| 5122 | event = rx_func_to_event[control->super]; |
| 5123 | if (l2cap_rx(chan, control, skb, event)) |
| 5124 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 5125 | } |
| 5126 | |
| 5127 | return 0; |
| 5128 | |
| 5129 | drop: |
| 5130 | kfree_skb(skb); |
| 5131 | return 0; |
| 5132 | } |
| 5133 | |
Andrei Emeltchenko | 13ca56e | 2012-05-31 11:18:55 +0300 | [diff] [blame] | 5134 | static void l2cap_data_channel(struct l2cap_conn *conn, u16 cid, |
| 5135 | struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5136 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 5137 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5138 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 5139 | chan = l2cap_get_chan_by_scid(conn, cid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 5140 | if (!chan) { |
Andrei Emeltchenko | 97e8e89 | 2012-05-29 13:59:17 +0300 | [diff] [blame] | 5141 | if (cid == L2CAP_CID_A2MP) { |
| 5142 | chan = a2mp_channel_create(conn, skb); |
| 5143 | if (!chan) { |
| 5144 | kfree_skb(skb); |
Andrei Emeltchenko | 13ca56e | 2012-05-31 11:18:55 +0300 | [diff] [blame] | 5145 | return; |
Andrei Emeltchenko | 97e8e89 | 2012-05-29 13:59:17 +0300 | [diff] [blame] | 5146 | } |
| 5147 | |
| 5148 | l2cap_chan_lock(chan); |
| 5149 | } else { |
| 5150 | BT_DBG("unknown cid 0x%4.4x", cid); |
| 5151 | /* Drop packet and return */ |
| 5152 | kfree_skb(skb); |
Andrei Emeltchenko | 13ca56e | 2012-05-31 11:18:55 +0300 | [diff] [blame] | 5153 | return; |
Andrei Emeltchenko | 97e8e89 | 2012-05-29 13:59:17 +0300 | [diff] [blame] | 5154 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5155 | } |
| 5156 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 5157 | BT_DBG("chan %p, len %d", chan, skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5158 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 5159 | if (chan->state != BT_CONNECTED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5160 | goto drop; |
| 5161 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 5162 | switch (chan->mode) { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 5163 | case L2CAP_MODE_BASIC: |
| 5164 | /* If socket recv buffers overflows we drop data here |
| 5165 | * which is *bad* because L2CAP has to be reliable. |
| 5166 | * But we don't have any other choice. L2CAP doesn't |
| 5167 | * provide flow control mechanism. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5168 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 5169 | if (chan->imtu < skb->len) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 5170 | goto drop; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5171 | |
Gustavo Padovan | 80b9802 | 2012-05-27 22:27:51 -0300 | [diff] [blame] | 5172 | if (!chan->ops->recv(chan, skb)) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 5173 | goto done; |
| 5174 | break; |
| 5175 | |
| 5176 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 5177 | case L2CAP_MODE_STREAMING: |
Mat Martineau | cec8ab6e | 2012-05-17 20:53:36 -0700 | [diff] [blame] | 5178 | l2cap_data_rcv(chan, skb); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 5179 | goto done; |
| 5180 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 5181 | default: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 5182 | 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] | 5183 | break; |
| 5184 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5185 | |
| 5186 | drop: |
| 5187 | kfree_skb(skb); |
| 5188 | |
| 5189 | done: |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 5190 | l2cap_chan_unlock(chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5191 | } |
| 5192 | |
Andrei Emeltchenko | 84104b2 | 2012-05-31 11:18:56 +0300 | [diff] [blame] | 5193 | static void l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, |
| 5194 | struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5195 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 5196 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5197 | |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 5198 | chan = l2cap_global_chan_by_psm(0, psm, conn->src, conn->dst); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 5199 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5200 | goto drop; |
| 5201 | |
Andrei Emeltchenko | 5b4ceda | 2012-02-24 16:35:32 +0200 | [diff] [blame] | 5202 | BT_DBG("chan %p, len %d", chan, skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5203 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 5204 | if (chan->state != BT_BOUND && chan->state != BT_CONNECTED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5205 | goto drop; |
| 5206 | |
Vinicius Costa Gomes | e13e21d | 2011-06-17 22:46:27 -0300 | [diff] [blame] | 5207 | if (chan->imtu < skb->len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5208 | goto drop; |
| 5209 | |
Gustavo Padovan | 80b9802 | 2012-05-27 22:27:51 -0300 | [diff] [blame] | 5210 | if (!chan->ops->recv(chan, skb)) |
Andrei Emeltchenko | 84104b2 | 2012-05-31 11:18:56 +0300 | [diff] [blame] | 5211 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5212 | |
| 5213 | drop: |
| 5214 | kfree_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5215 | } |
| 5216 | |
Andrei Emeltchenko | 6810fca | 2012-05-31 11:18:57 +0300 | [diff] [blame] | 5217 | static void l2cap_att_channel(struct l2cap_conn *conn, u16 cid, |
| 5218 | struct sk_buff *skb) |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 5219 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 5220 | struct l2cap_chan *chan; |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 5221 | |
Ido Yariv | c228768 | 2012-04-20 15:46:07 -0300 | [diff] [blame] | 5222 | chan = l2cap_global_chan_by_scid(0, cid, conn->src, conn->dst); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 5223 | if (!chan) |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 5224 | goto drop; |
| 5225 | |
Andrei Emeltchenko | 5b4ceda | 2012-02-24 16:35:32 +0200 | [diff] [blame] | 5226 | BT_DBG("chan %p, len %d", chan, skb->len); |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 5227 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 5228 | if (chan->state != BT_BOUND && chan->state != BT_CONNECTED) |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 5229 | goto drop; |
| 5230 | |
Vinicius Costa Gomes | e13e21d | 2011-06-17 22:46:27 -0300 | [diff] [blame] | 5231 | if (chan->imtu < skb->len) |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 5232 | goto drop; |
| 5233 | |
Gustavo Padovan | 80b9802 | 2012-05-27 22:27:51 -0300 | [diff] [blame] | 5234 | if (!chan->ops->recv(chan, skb)) |
Andrei Emeltchenko | 6810fca | 2012-05-31 11:18:57 +0300 | [diff] [blame] | 5235 | return; |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 5236 | |
| 5237 | drop: |
| 5238 | kfree_skb(skb); |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 5239 | } |
| 5240 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5241 | static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) |
| 5242 | { |
| 5243 | struct l2cap_hdr *lh = (void *) skb->data; |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 5244 | u16 cid, len; |
| 5245 | __le16 psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5246 | |
| 5247 | skb_pull(skb, L2CAP_HDR_SIZE); |
| 5248 | cid = __le16_to_cpu(lh->cid); |
| 5249 | len = __le16_to_cpu(lh->len); |
| 5250 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 5251 | if (len != skb->len) { |
| 5252 | kfree_skb(skb); |
| 5253 | return; |
| 5254 | } |
| 5255 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5256 | BT_DBG("len %d, cid 0x%4.4x", len, cid); |
| 5257 | |
| 5258 | switch (cid) { |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 5259 | case L2CAP_CID_LE_SIGNALING: |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 5260 | case L2CAP_CID_SIGNALING: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5261 | l2cap_sig_channel(conn, skb); |
| 5262 | break; |
| 5263 | |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 5264 | case L2CAP_CID_CONN_LESS: |
Andrei Emeltchenko | 097db76 | 2012-03-09 14:16:17 +0200 | [diff] [blame] | 5265 | psm = get_unaligned((__le16 *) skb->data); |
Andrei Emeltchenko | 0181a70 | 2012-05-29 10:04:05 +0300 | [diff] [blame] | 5266 | skb_pull(skb, L2CAP_PSMLEN_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5267 | l2cap_conless_channel(conn, psm, skb); |
| 5268 | break; |
| 5269 | |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 5270 | case L2CAP_CID_LE_DATA: |
| 5271 | l2cap_att_channel(conn, cid, skb); |
| 5272 | break; |
| 5273 | |
Anderson Briglia | b501d6a | 2011-06-07 18:46:31 -0300 | [diff] [blame] | 5274 | case L2CAP_CID_SMP: |
| 5275 | if (smp_sig_channel(conn, skb)) |
| 5276 | l2cap_conn_del(conn->hcon, EACCES); |
| 5277 | break; |
| 5278 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5279 | default: |
| 5280 | l2cap_data_channel(conn, cid, skb); |
| 5281 | break; |
| 5282 | } |
| 5283 | } |
| 5284 | |
| 5285 | /* ---- L2CAP interface with lower layer (HCI) ---- */ |
| 5286 | |
Ulisses Furquim | 686ebf2 | 2011-12-21 10:11:33 -0200 | [diff] [blame] | 5287 | int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5288 | { |
| 5289 | int exact = 0, lm1 = 0, lm2 = 0; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 5290 | struct l2cap_chan *c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5291 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5292 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); |
| 5293 | |
| 5294 | /* Find listening sockets and check their link_mode */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 5295 | read_lock(&chan_list_lock); |
| 5296 | list_for_each_entry(c, &chan_list, global_l) { |
| 5297 | struct sock *sk = c->sk; |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 5298 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 5299 | if (c->state != BT_LISTEN) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5300 | continue; |
| 5301 | |
| 5302 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 5303 | lm1 |= HCI_LM_ACCEPT; |
Andrei Emeltchenko | 43bd0f3 | 2011-10-11 14:04:34 +0300 | [diff] [blame] | 5304 | if (test_bit(FLAG_ROLE_SWITCH, &c->flags)) |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 5305 | lm1 |= HCI_LM_MASTER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5306 | exact++; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 5307 | } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { |
| 5308 | lm2 |= HCI_LM_ACCEPT; |
Andrei Emeltchenko | 43bd0f3 | 2011-10-11 14:04:34 +0300 | [diff] [blame] | 5309 | if (test_bit(FLAG_ROLE_SWITCH, &c->flags)) |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 5310 | lm2 |= HCI_LM_MASTER; |
| 5311 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5312 | } |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 5313 | read_unlock(&chan_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5314 | |
| 5315 | return exact ? lm1 : lm2; |
| 5316 | } |
| 5317 | |
Ulisses Furquim | 686ebf2 | 2011-12-21 10:11:33 -0200 | [diff] [blame] | 5318 | int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5319 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 5320 | struct l2cap_conn *conn; |
| 5321 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5322 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); |
| 5323 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5324 | if (!status) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5325 | conn = l2cap_conn_add(hcon, status); |
| 5326 | if (conn) |
| 5327 | l2cap_conn_ready(conn); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 5328 | } else |
Joe Perches | e175072 | 2011-06-29 18:18:29 -0700 | [diff] [blame] | 5329 | l2cap_conn_del(hcon, bt_to_errno(status)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5330 | |
| 5331 | return 0; |
| 5332 | } |
| 5333 | |
Ulisses Furquim | 686ebf2 | 2011-12-21 10:11:33 -0200 | [diff] [blame] | 5334 | int l2cap_disconn_ind(struct hci_conn *hcon) |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 5335 | { |
| 5336 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 5337 | |
| 5338 | BT_DBG("hcon %p", hcon); |
| 5339 | |
Ulisses Furquim | 686ebf2 | 2011-12-21 10:11:33 -0200 | [diff] [blame] | 5340 | if (!conn) |
Andrei Emeltchenko | 9f5a0d7 | 2011-11-07 14:20:25 +0200 | [diff] [blame] | 5341 | return HCI_ERROR_REMOTE_USER_TERM; |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 5342 | return conn->disc_reason; |
| 5343 | } |
| 5344 | |
Ulisses Furquim | 686ebf2 | 2011-12-21 10:11:33 -0200 | [diff] [blame] | 5345 | int l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5346 | { |
| 5347 | BT_DBG("hcon %p reason %d", hcon, reason); |
| 5348 | |
Joe Perches | e175072 | 2011-06-29 18:18:29 -0700 | [diff] [blame] | 5349 | l2cap_conn_del(hcon, bt_to_errno(reason)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5350 | return 0; |
| 5351 | } |
| 5352 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 5353 | static inline void l2cap_check_encryption(struct l2cap_chan *chan, u8 encrypt) |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 5354 | { |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 5355 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) |
Marcel Holtmann | 255c760 | 2009-02-04 21:07:19 +0100 | [diff] [blame] | 5356 | return; |
| 5357 | |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 5358 | if (encrypt == 0x00) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 5359 | if (chan->sec_level == BT_SECURITY_MEDIUM) { |
Marcel Holtmann | ba13ccd | 2012-03-01 14:25:33 -0800 | [diff] [blame] | 5360 | __set_chan_timer(chan, L2CAP_ENC_TIMEOUT); |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 5361 | } else if (chan->sec_level == BT_SECURITY_HIGH) |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 5362 | l2cap_chan_close(chan, ECONNREFUSED); |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 5363 | } else { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 5364 | if (chan->sec_level == BT_SECURITY_MEDIUM) |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 5365 | __clear_chan_timer(chan); |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 5366 | } |
| 5367 | } |
| 5368 | |
Ulisses Furquim | 686ebf2 | 2011-12-21 10:11:33 -0200 | [diff] [blame] | 5369 | int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5370 | { |
Marcel Holtmann | 40be492 | 2008-07-14 20:13:50 +0200 | [diff] [blame] | 5371 | struct l2cap_conn *conn = hcon->l2cap_data; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 5372 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5373 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 5374 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5375 | return 0; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 5376 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5377 | BT_DBG("conn %p", conn); |
| 5378 | |
Vinicius Costa Gomes | 160dc6a | 2011-08-19 21:06:55 -0300 | [diff] [blame] | 5379 | if (hcon->type == LE_LINK) { |
Hemant Gupta | 35d4adcc | 2012-04-18 14:46:26 +0530 | [diff] [blame] | 5380 | if (!status && encrypt) |
| 5381 | smp_distribute_keys(conn, 0); |
Ulisses Furquim | 17cd3f3 | 2012-01-30 18:26:28 -0200 | [diff] [blame] | 5382 | cancel_delayed_work(&conn->security_timer); |
Vinicius Costa Gomes | 160dc6a | 2011-08-19 21:06:55 -0300 | [diff] [blame] | 5383 | } |
| 5384 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 5385 | mutex_lock(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5386 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 5387 | list_for_each_entry(chan, &conn->chan_l, list) { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 5388 | l2cap_chan_lock(chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5389 | |
Vinicius Costa Gomes | f1cb9af | 2011-01-26 21:42:57 -0300 | [diff] [blame] | 5390 | BT_DBG("chan->scid %d", chan->scid); |
| 5391 | |
| 5392 | if (chan->scid == L2CAP_CID_LE_DATA) { |
| 5393 | if (!status && encrypt) { |
| 5394 | chan->sec_level = hcon->sec_level; |
Andrei Emeltchenko | cf4cd00 | 2012-02-06 15:03:59 +0200 | [diff] [blame] | 5395 | l2cap_chan_ready(chan); |
Vinicius Costa Gomes | f1cb9af | 2011-01-26 21:42:57 -0300 | [diff] [blame] | 5396 | } |
| 5397 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 5398 | l2cap_chan_unlock(chan); |
Vinicius Costa Gomes | f1cb9af | 2011-01-26 21:42:57 -0300 | [diff] [blame] | 5399 | continue; |
| 5400 | } |
| 5401 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 5402 | if (test_bit(CONF_CONNECT_PEND, &chan->conf_state)) { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 5403 | l2cap_chan_unlock(chan); |
Marcel Holtmann | 6a8d301 | 2009-02-06 23:56:36 +0100 | [diff] [blame] | 5404 | continue; |
| 5405 | } |
| 5406 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 5407 | if (!status && (chan->state == BT_CONNECTED || |
| 5408 | chan->state == BT_CONFIG)) { |
Gustavo Padovan | a7d7723 | 2012-05-13 03:20:07 -0300 | [diff] [blame] | 5409 | struct sock *sk = chan->sk; |
| 5410 | |
Gustavo Padovan | c5daa68 | 2012-05-16 12:17:10 -0300 | [diff] [blame] | 5411 | clear_bit(BT_SK_SUSPEND, &bt_sk(sk)->flags); |
Gustavo Padovan | a7d7723 | 2012-05-13 03:20:07 -0300 | [diff] [blame] | 5412 | sk->sk_state_change(sk); |
| 5413 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 5414 | l2cap_check_encryption(chan, encrypt); |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 5415 | l2cap_chan_unlock(chan); |
Marcel Holtmann | 9719f8a | 2008-07-14 20:13:45 +0200 | [diff] [blame] | 5416 | continue; |
| 5417 | } |
| 5418 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 5419 | if (chan->state == BT_CONNECT) { |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 5420 | if (!status) { |
Andrei Emeltchenko | 9b27f35 | 2012-02-24 16:00:00 +0200 | [diff] [blame] | 5421 | l2cap_send_conn_req(chan); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 5422 | } else { |
Marcel Holtmann | ba13ccd | 2012-03-01 14:25:33 -0800 | [diff] [blame] | 5423 | __set_chan_timer(chan, L2CAP_DISC_TIMEOUT); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 5424 | } |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 5425 | } else if (chan->state == BT_CONNECT2) { |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 5426 | struct sock *sk = chan->sk; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 5427 | struct l2cap_conn_rsp rsp; |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 5428 | __u16 res, stat; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 5429 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 5430 | lock_sock(sk); |
| 5431 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 5432 | if (!status) { |
Gustavo Padovan | c5daa68 | 2012-05-16 12:17:10 -0300 | [diff] [blame] | 5433 | if (test_bit(BT_SK_DEFER_SETUP, |
| 5434 | &bt_sk(sk)->flags)) { |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 5435 | struct sock *parent = bt_sk(sk)->parent; |
| 5436 | res = L2CAP_CR_PEND; |
| 5437 | stat = L2CAP_CS_AUTHOR_PEND; |
Ilia Kolomisnky | 05e9a2f | 2011-07-15 18:30:21 +0000 | [diff] [blame] | 5438 | if (parent) |
| 5439 | parent->sk_data_ready(parent, 0); |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 5440 | } else { |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 5441 | __l2cap_state_change(chan, BT_CONFIG); |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 5442 | res = L2CAP_CR_SUCCESS; |
| 5443 | stat = L2CAP_CS_NO_INFO; |
| 5444 | } |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 5445 | } else { |
Andrei Emeltchenko | 0e587be | 2012-02-21 12:54:57 +0200 | [diff] [blame] | 5446 | __l2cap_state_change(chan, BT_DISCONN); |
Marcel Holtmann | ba13ccd | 2012-03-01 14:25:33 -0800 | [diff] [blame] | 5447 | __set_chan_timer(chan, L2CAP_DISC_TIMEOUT); |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 5448 | res = L2CAP_CR_SEC_BLOCK; |
| 5449 | stat = L2CAP_CS_NO_INFO; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 5450 | } |
| 5451 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 5452 | release_sock(sk); |
| 5453 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 5454 | rsp.scid = cpu_to_le16(chan->dcid); |
| 5455 | rsp.dcid = cpu_to_le16(chan->scid); |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 5456 | rsp.result = cpu_to_le16(res); |
| 5457 | rsp.status = cpu_to_le16(stat); |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 5458 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, |
| 5459 | sizeof(rsp), &rsp); |
Mat Martineau | 2d36935 | 2012-05-23 14:59:30 -0700 | [diff] [blame] | 5460 | |
| 5461 | if (!test_bit(CONF_REQ_SENT, &chan->conf_state) && |
| 5462 | res == L2CAP_CR_SUCCESS) { |
| 5463 | char buf[128]; |
| 5464 | set_bit(CONF_REQ_SENT, &chan->conf_state); |
| 5465 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
| 5466 | L2CAP_CONF_REQ, |
| 5467 | l2cap_build_conf_req(chan, buf), |
| 5468 | buf); |
| 5469 | chan->num_conf_req++; |
| 5470 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5471 | } |
| 5472 | |
Andrei Emeltchenko | 6be3655 | 2012-02-22 17:11:56 +0200 | [diff] [blame] | 5473 | l2cap_chan_unlock(chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5474 | } |
| 5475 | |
Andrei Emeltchenko | 3df91ea | 2012-02-21 12:54:55 +0200 | [diff] [blame] | 5476 | mutex_unlock(&conn->chan_lock); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 5477 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5478 | return 0; |
| 5479 | } |
| 5480 | |
Ulisses Furquim | 686ebf2 | 2011-12-21 10:11:33 -0200 | [diff] [blame] | 5481 | int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5482 | { |
| 5483 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 5484 | |
Andrei Emeltchenko | 5a08ecc | 2011-01-11 17:20:20 +0200 | [diff] [blame] | 5485 | if (!conn) |
| 5486 | conn = l2cap_conn_add(hcon, 0); |
| 5487 | |
| 5488 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5489 | goto drop; |
| 5490 | |
| 5491 | BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); |
| 5492 | |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 5493 | if (!(flags & ACL_CONT)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5494 | struct l2cap_hdr *hdr; |
| 5495 | int len; |
| 5496 | |
| 5497 | if (conn->rx_len) { |
| 5498 | BT_ERR("Unexpected start frame (len %d)", skb->len); |
| 5499 | kfree_skb(conn->rx_skb); |
| 5500 | conn->rx_skb = NULL; |
| 5501 | conn->rx_len = 0; |
| 5502 | l2cap_conn_unreliable(conn, ECOMM); |
| 5503 | } |
| 5504 | |
Andrei Emeltchenko | aae7fe2 | 2010-09-15 14:28:43 +0300 | [diff] [blame] | 5505 | /* Start fragment always begin with Basic L2CAP header */ |
| 5506 | if (skb->len < L2CAP_HDR_SIZE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5507 | BT_ERR("Frame is too short (len %d)", skb->len); |
| 5508 | l2cap_conn_unreliable(conn, ECOMM); |
| 5509 | goto drop; |
| 5510 | } |
| 5511 | |
| 5512 | hdr = (struct l2cap_hdr *) skb->data; |
| 5513 | len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; |
| 5514 | |
| 5515 | if (len == skb->len) { |
| 5516 | /* Complete frame received */ |
| 5517 | l2cap_recv_frame(conn, skb); |
| 5518 | return 0; |
| 5519 | } |
| 5520 | |
| 5521 | BT_DBG("Start: total len %d, frag len %d", len, skb->len); |
| 5522 | |
| 5523 | if (skb->len > len) { |
| 5524 | BT_ERR("Frame is too long (len %d, expected len %d)", |
| 5525 | skb->len, len); |
| 5526 | l2cap_conn_unreliable(conn, ECOMM); |
| 5527 | goto drop; |
| 5528 | } |
| 5529 | |
| 5530 | /* Allocate skb for the complete frame (with header) */ |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 5531 | conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC); |
| 5532 | if (!conn->rx_skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5533 | goto drop; |
| 5534 | |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 5535 | 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] | 5536 | skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5537 | conn->rx_len = len - skb->len; |
| 5538 | } else { |
| 5539 | BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); |
| 5540 | |
| 5541 | if (!conn->rx_len) { |
| 5542 | BT_ERR("Unexpected continuation frame (len %d)", skb->len); |
| 5543 | l2cap_conn_unreliable(conn, ECOMM); |
| 5544 | goto drop; |
| 5545 | } |
| 5546 | |
| 5547 | if (skb->len > conn->rx_len) { |
| 5548 | BT_ERR("Fragment is too long (len %d, expected %d)", |
| 5549 | skb->len, conn->rx_len); |
| 5550 | kfree_skb(conn->rx_skb); |
| 5551 | conn->rx_skb = NULL; |
| 5552 | conn->rx_len = 0; |
| 5553 | l2cap_conn_unreliable(conn, ECOMM); |
| 5554 | goto drop; |
| 5555 | } |
| 5556 | |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 5557 | 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] | 5558 | skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5559 | conn->rx_len -= skb->len; |
| 5560 | |
| 5561 | if (!conn->rx_len) { |
| 5562 | /* Complete frame received */ |
| 5563 | l2cap_recv_frame(conn, conn->rx_skb); |
| 5564 | conn->rx_skb = NULL; |
| 5565 | } |
| 5566 | } |
| 5567 | |
| 5568 | drop: |
| 5569 | kfree_skb(skb); |
| 5570 | return 0; |
| 5571 | } |
| 5572 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 5573 | static int l2cap_debugfs_show(struct seq_file *f, void *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5574 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 5575 | struct l2cap_chan *c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5576 | |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 5577 | read_lock(&chan_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5578 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 5579 | list_for_each_entry(c, &chan_list, global_l) { |
| 5580 | struct sock *sk = c->sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5581 | |
Gustavo F. Padovan | 903d343 | 2011-02-10 14:16:06 -0200 | [diff] [blame] | 5582 | 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] | 5583 | batostr(&bt_sk(sk)->src), |
| 5584 | batostr(&bt_sk(sk)->dst), |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 5585 | c->state, __le16_to_cpu(c->psm), |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 5586 | c->scid, c->dcid, c->imtu, c->omtu, |
| 5587 | c->sec_level, c->mode); |
Andrei Emeltchenko | 61e1b4b | 2012-01-19 11:19:50 +0200 | [diff] [blame] | 5588 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5589 | |
Gustavo F. Padovan | 333055f | 2011-12-22 15:14:39 -0200 | [diff] [blame] | 5590 | read_unlock(&chan_list_lock); |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 5591 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 5592 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5593 | } |
| 5594 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 5595 | static int l2cap_debugfs_open(struct inode *inode, struct file *file) |
| 5596 | { |
| 5597 | return single_open(file, l2cap_debugfs_show, inode->i_private); |
| 5598 | } |
| 5599 | |
| 5600 | static const struct file_operations l2cap_debugfs_fops = { |
| 5601 | .open = l2cap_debugfs_open, |
| 5602 | .read = seq_read, |
| 5603 | .llseek = seq_lseek, |
| 5604 | .release = single_release, |
| 5605 | }; |
| 5606 | |
| 5607 | static struct dentry *l2cap_debugfs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5608 | |
Gustavo F. Padovan | 6427451 | 2011-02-07 20:08:52 -0200 | [diff] [blame] | 5609 | int __init l2cap_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5610 | { |
| 5611 | int err; |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 5612 | |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 5613 | err = l2cap_init_sockets(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5614 | if (err < 0) |
| 5615 | return err; |
| 5616 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 5617 | if (bt_debugfs) { |
| 5618 | l2cap_debugfs = debugfs_create_file("l2cap", 0444, |
| 5619 | bt_debugfs, NULL, &l2cap_debugfs_fops); |
| 5620 | if (!l2cap_debugfs) |
| 5621 | BT_ERR("Failed to create L2CAP debug file"); |
| 5622 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5623 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5624 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5625 | } |
| 5626 | |
Gustavo F. Padovan | 6427451 | 2011-02-07 20:08:52 -0200 | [diff] [blame] | 5627 | void l2cap_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5628 | { |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 5629 | debugfs_remove(l2cap_debugfs); |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 5630 | l2cap_cleanup_sockets(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5631 | } |
| 5632 | |
Gustavo F. Padovan | d1c4a17 | 2010-07-18 16:25:54 -0300 | [diff] [blame] | 5633 | module_param(disable_ertm, bool, 0644); |
| 5634 | MODULE_PARM_DESC(disable_ertm, "Disable enhanced retransmission mode"); |