YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | BlueZ - Bluetooth protocol stack for Linux |
| 3 | Copyright (C) 2000-2001 Qualcomm Incorporated |
Gustavo F. Padovan | ce5706b | 2010-07-13 11:57:11 -0300 | [diff] [blame] | 4 | Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org> |
Gustavo F. Padovan | 5d8868f | 2010-07-16 16:18:39 -0300 | [diff] [blame] | 5 | Copyright (C) 2010 Google Inc. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | |
| 7 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License version 2 as |
| 11 | published by the Free Software Foundation; |
| 12 | |
| 13 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| 14 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 15 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. |
| 16 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 17 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
| 18 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 19 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 21 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 22 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
| 23 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | SOFTWARE IS DISCLAIMED. |
| 25 | */ |
| 26 | |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 27 | /* Bluetooth L2CAP core. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/module.h> |
| 30 | |
| 31 | #include <linux/types.h> |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 32 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/errno.h> |
| 34 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <linux/sched.h> |
| 36 | #include <linux/slab.h> |
| 37 | #include <linux/poll.h> |
| 38 | #include <linux/fcntl.h> |
| 39 | #include <linux/init.h> |
| 40 | #include <linux/interrupt.h> |
| 41 | #include <linux/socket.h> |
| 42 | #include <linux/skbuff.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include <linux/list.h> |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 44 | #include <linux/device.h> |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 45 | #include <linux/debugfs.h> |
| 46 | #include <linux/seq_file.h> |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 47 | #include <linux/uaccess.h> |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 48 | #include <linux/crc16.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | #include <net/sock.h> |
| 50 | |
| 51 | #include <asm/system.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | #include <asm/unaligned.h> |
| 53 | |
| 54 | #include <net/bluetooth/bluetooth.h> |
| 55 | #include <net/bluetooth/hci_core.h> |
| 56 | #include <net/bluetooth/l2cap.h> |
Anderson Briglia | b501d6a | 2011-06-07 18:46:31 -0300 | [diff] [blame] | 57 | #include <net/bluetooth/smp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 59 | int disable_ertm; |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 60 | |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 61 | static u32 l2cap_feat_mask = L2CAP_FEAT_FIXED_CHAN; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 62 | static u8 l2cap_fixed_chan[8] = { 0x02, }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
Johannes Berg | b5ad8b7 | 2011-06-01 08:54:45 +0200 | [diff] [blame] | 64 | static LIST_HEAD(chan_list); |
| 65 | static DEFINE_RWLOCK(chan_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, |
| 68 | u8 code, u8 ident, u16 dlen, void *data); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 69 | static void l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, |
| 70 | void *data); |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 71 | static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 72 | static void l2cap_send_disconn_req(struct l2cap_conn *conn, |
| 73 | struct l2cap_chan *chan, int err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 75 | static int l2cap_ertm_data_rcv(struct sock *sk, struct sk_buff *skb); |
| 76 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 77 | /* ---- L2CAP channels ---- */ |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 78 | |
| 79 | static inline void chan_hold(struct l2cap_chan *c) |
| 80 | { |
| 81 | atomic_inc(&c->refcnt); |
| 82 | } |
| 83 | |
| 84 | static inline void chan_put(struct l2cap_chan *c) |
| 85 | { |
| 86 | if (atomic_dec_and_test(&c->refcnt)) |
| 87 | kfree(c); |
| 88 | } |
| 89 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 90 | 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] | 91 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 92 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 93 | |
| 94 | list_for_each_entry(c, &conn->chan_l, list) { |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 95 | if (c->dcid == cid) |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 96 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 97 | } |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 98 | return NULL; |
| 99 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 100 | } |
| 101 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 102 | static struct l2cap_chan *__l2cap_get_chan_by_scid(struct l2cap_conn *conn, u16 cid) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 103 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 104 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 105 | |
| 106 | list_for_each_entry(c, &conn->chan_l, list) { |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 107 | if (c->scid == cid) |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 108 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 109 | } |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 110 | return NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 111 | } |
| 112 | |
| 113 | /* Find channel with given SCID. |
| 114 | * Returns locked socket */ |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 115 | 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] | 116 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 117 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 118 | |
| 119 | read_lock(&conn->chan_lock); |
| 120 | c = __l2cap_get_chan_by_scid(conn, cid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 121 | if (c) |
| 122 | bh_lock_sock(c->sk); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 123 | read_unlock(&conn->chan_lock); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 124 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 125 | } |
| 126 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 127 | 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] | 128 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 129 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 130 | |
| 131 | list_for_each_entry(c, &conn->chan_l, list) { |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 132 | if (c->ident == ident) |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 133 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 134 | } |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 135 | return NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 136 | } |
| 137 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 138 | static inline struct l2cap_chan *l2cap_get_chan_by_ident(struct l2cap_conn *conn, u8 ident) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 139 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 140 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 141 | |
| 142 | read_lock(&conn->chan_lock); |
| 143 | c = __l2cap_get_chan_by_ident(conn, ident); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 144 | if (c) |
| 145 | bh_lock_sock(c->sk); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 146 | read_unlock(&conn->chan_lock); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 147 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 148 | } |
| 149 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 150 | 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] | 151 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 152 | struct l2cap_chan *c; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 153 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 154 | list_for_each_entry(c, &chan_list, global_l) { |
| 155 | if (c->sport == psm && !bacmp(&bt_sk(c->sk)->src, src)) |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 156 | goto found; |
| 157 | } |
| 158 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 159 | c = NULL; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 160 | found: |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 161 | return c; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 162 | } |
| 163 | |
| 164 | int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm) |
| 165 | { |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 166 | int err; |
| 167 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 168 | write_lock_bh(&chan_list_lock); |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 169 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 170 | if (psm && __l2cap_global_chan_by_addr(psm, src)) { |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 171 | err = -EADDRINUSE; |
| 172 | goto done; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 173 | } |
| 174 | |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 175 | if (psm) { |
| 176 | chan->psm = psm; |
| 177 | chan->sport = psm; |
| 178 | err = 0; |
| 179 | } else { |
| 180 | u16 p; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 181 | |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 182 | err = -EINVAL; |
| 183 | for (p = 0x1001; p < 0x1100; p += 2) |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 184 | if (!__l2cap_global_chan_by_addr(cpu_to_le16(p), src)) { |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 185 | chan->psm = cpu_to_le16(p); |
| 186 | chan->sport = cpu_to_le16(p); |
| 187 | err = 0; |
| 188 | break; |
| 189 | } |
| 190 | } |
| 191 | |
| 192 | done: |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 193 | write_unlock_bh(&chan_list_lock); |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 194 | return err; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 195 | } |
| 196 | |
| 197 | int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid) |
| 198 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 199 | write_lock_bh(&chan_list_lock); |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 200 | |
| 201 | chan->scid = scid; |
| 202 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 203 | write_unlock_bh(&chan_list_lock); |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 204 | |
| 205 | return 0; |
| 206 | } |
| 207 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 208 | static u16 l2cap_alloc_cid(struct l2cap_conn *conn) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 209 | { |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 210 | u16 cid = L2CAP_CID_DYN_START; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 211 | |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 212 | for (; cid < L2CAP_CID_DYN_END; cid++) { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 213 | if (!__l2cap_get_chan_by_scid(conn, cid)) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 214 | return cid; |
| 215 | } |
| 216 | |
| 217 | return 0; |
| 218 | } |
| 219 | |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 220 | static void l2cap_set_timer(struct l2cap_chan *chan, struct timer_list *timer, long timeout) |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 221 | { |
Mat Martineau | 774e565 | 2011-06-29 14:35:20 -0700 | [diff] [blame] | 222 | BT_DBG("chan %p state %d timeout %ld", chan->sk, chan->state, timeout); |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 223 | |
Mat Martineau | 942ecc9 | 2011-06-29 14:35:21 -0700 | [diff] [blame] | 224 | if (!mod_timer(timer, jiffies + msecs_to_jiffies(timeout))) |
Mat Martineau | 774e565 | 2011-06-29 14:35:20 -0700 | [diff] [blame] | 225 | chan_hold(chan); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 226 | } |
| 227 | |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 228 | static void l2cap_clear_timer(struct l2cap_chan *chan, struct timer_list *timer) |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 229 | { |
Mat Martineau | 774e565 | 2011-06-29 14:35:20 -0700 | [diff] [blame] | 230 | BT_DBG("chan %p state %d", chan, chan->state); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 231 | |
Mat Martineau | 774e565 | 2011-06-29 14:35:20 -0700 | [diff] [blame] | 232 | if (timer_pending(timer) && del_timer(timer)) |
| 233 | chan_put(chan); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 234 | } |
| 235 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 236 | static void l2cap_state_change(struct l2cap_chan *chan, int state) |
| 237 | { |
| 238 | chan->state = state; |
| 239 | chan->ops->state_change(chan->data, state); |
| 240 | } |
| 241 | |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 242 | static void l2cap_chan_timeout(unsigned long arg) |
| 243 | { |
| 244 | struct l2cap_chan *chan = (struct l2cap_chan *) arg; |
| 245 | struct sock *sk = chan->sk; |
| 246 | int reason; |
| 247 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 248 | BT_DBG("chan %p state %d", chan, chan->state); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 249 | |
| 250 | bh_lock_sock(sk); |
| 251 | |
| 252 | if (sock_owned_by_user(sk)) { |
| 253 | /* sk is owned by user. Try again later */ |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 254 | __set_chan_timer(chan, HZ / 5); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 255 | bh_unlock_sock(sk); |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 256 | chan_put(chan); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 257 | return; |
| 258 | } |
| 259 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 260 | if (chan->state == BT_CONNECTED || chan->state == BT_CONFIG) |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 261 | reason = ECONNREFUSED; |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 262 | else if (chan->state == BT_CONNECT && |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 263 | chan->sec_level != BT_SECURITY_SDP) |
| 264 | reason = ECONNREFUSED; |
| 265 | else |
| 266 | reason = ETIMEDOUT; |
| 267 | |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 268 | l2cap_chan_close(chan, reason); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 269 | |
| 270 | bh_unlock_sock(sk); |
| 271 | |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 272 | chan->ops->close(chan->data); |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 273 | chan_put(chan); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 274 | } |
| 275 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 276 | struct l2cap_chan *l2cap_chan_create(struct sock *sk) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 277 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 278 | struct l2cap_chan *chan; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 279 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 280 | chan = kzalloc(sizeof(*chan), GFP_ATOMIC); |
| 281 | if (!chan) |
| 282 | return NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 283 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 284 | chan->sk = sk; |
| 285 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 286 | write_lock_bh(&chan_list_lock); |
| 287 | list_add(&chan->global_l, &chan_list); |
| 288 | write_unlock_bh(&chan_list_lock); |
| 289 | |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 290 | setup_timer(&chan->chan_timer, l2cap_chan_timeout, (unsigned long) chan); |
| 291 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 292 | chan->state = BT_OPEN; |
| 293 | |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 294 | atomic_set(&chan->refcnt, 1); |
| 295 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 296 | return chan; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 297 | } |
| 298 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 299 | void l2cap_chan_destroy(struct l2cap_chan *chan) |
Gustavo F. Padovan | 6ff5abb | 2011-04-25 15:10:41 -0300 | [diff] [blame] | 300 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 301 | write_lock_bh(&chan_list_lock); |
| 302 | list_del(&chan->global_l); |
| 303 | write_unlock_bh(&chan_list_lock); |
| 304 | |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 305 | chan_put(chan); |
Gustavo F. Padovan | 6ff5abb | 2011-04-25 15:10:41 -0300 | [diff] [blame] | 306 | } |
| 307 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 308 | 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] | 309 | { |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 310 | BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 311 | chan->psm, chan->dcid); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 312 | |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 313 | conn->disc_reason = 0x13; |
| 314 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 315 | chan->conn = conn; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 316 | |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 317 | if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED) { |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 318 | if (conn->hcon->type == LE_LINK) { |
| 319 | /* LE connection */ |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 320 | chan->omtu = L2CAP_LE_DEFAULT_MTU; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 321 | chan->scid = L2CAP_CID_LE_DATA; |
| 322 | chan->dcid = L2CAP_CID_LE_DATA; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 323 | } else { |
| 324 | /* Alloc CID for connection-oriented socket */ |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 325 | chan->scid = l2cap_alloc_cid(conn); |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 326 | chan->omtu = L2CAP_DEFAULT_MTU; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 327 | } |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 328 | } else if (chan->chan_type == L2CAP_CHAN_CONN_LESS) { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 329 | /* Connectionless socket */ |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 330 | chan->scid = L2CAP_CID_CONN_LESS; |
| 331 | chan->dcid = L2CAP_CID_CONN_LESS; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 332 | chan->omtu = L2CAP_DEFAULT_MTU; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 333 | } else { |
| 334 | /* Raw socket can send/recv signalling messages only */ |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 335 | chan->scid = L2CAP_CID_SIGNALING; |
| 336 | chan->dcid = L2CAP_CID_SIGNALING; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 337 | chan->omtu = L2CAP_DEFAULT_MTU; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 338 | } |
| 339 | |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 340 | chan_hold(chan); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 341 | |
| 342 | list_add(&chan->list, &conn->chan_l); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 343 | } |
| 344 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 345 | /* Delete channel. |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 346 | * Must be called on the locked socket. */ |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 347 | static void l2cap_chan_del(struct l2cap_chan *chan, int err) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 348 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 349 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 350 | struct l2cap_conn *conn = chan->conn; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 351 | struct sock *parent = bt_sk(sk)->parent; |
| 352 | |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 353 | __clear_chan_timer(chan); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 354 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 355 | BT_DBG("chan %p, conn %p, err %d", chan, conn, err); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 356 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 357 | if (conn) { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 358 | /* Delete from channel list */ |
| 359 | write_lock_bh(&conn->chan_lock); |
| 360 | list_del(&chan->list); |
| 361 | write_unlock_bh(&conn->chan_lock); |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 362 | chan_put(chan); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 363 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 364 | chan->conn = NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 365 | hci_conn_put(conn->hcon); |
| 366 | } |
| 367 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 368 | l2cap_state_change(chan, BT_CLOSED); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 369 | sock_set_flag(sk, SOCK_ZAPPED); |
| 370 | |
| 371 | if (err) |
| 372 | sk->sk_err = err; |
| 373 | |
| 374 | if (parent) { |
| 375 | bt_accept_unlink(sk); |
| 376 | parent->sk_data_ready(parent, 0); |
| 377 | } else |
| 378 | sk->sk_state_change(sk); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 379 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 380 | if (!(test_bit(CONF_OUTPUT_DONE, &chan->conf_state) && |
| 381 | test_bit(CONF_INPUT_DONE, &chan->conf_state))) |
Gustavo F. Padovan | 6ff5abb | 2011-04-25 15:10:41 -0300 | [diff] [blame] | 382 | return; |
Gustavo F. Padovan | 2ead70b | 2011-04-01 15:13:36 -0300 | [diff] [blame] | 383 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 384 | skb_queue_purge(&chan->tx_q); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 385 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 386 | if (chan->mode == L2CAP_MODE_ERTM) { |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 387 | struct srej_list *l, *tmp; |
| 388 | |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 389 | __clear_retrans_timer(chan); |
| 390 | __clear_monitor_timer(chan); |
| 391 | __clear_ack_timer(chan); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 392 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 393 | skb_queue_purge(&chan->srej_q); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 394 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 395 | list_for_each_entry_safe(l, tmp, &chan->srej_l, list) { |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 396 | list_del(&l->list); |
| 397 | kfree(l); |
| 398 | } |
| 399 | } |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 400 | } |
| 401 | |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 402 | static void l2cap_chan_cleanup_listen(struct sock *parent) |
| 403 | { |
| 404 | struct sock *sk; |
| 405 | |
| 406 | BT_DBG("parent %p", parent); |
| 407 | |
| 408 | /* Close not yet accepted channels */ |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 409 | while ((sk = bt_accept_dequeue(parent, NULL))) { |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 410 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 411 | __clear_chan_timer(chan); |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 412 | lock_sock(sk); |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 413 | l2cap_chan_close(chan, ECONNRESET); |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 414 | release_sock(sk); |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 415 | chan->ops->close(chan->data); |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 416 | } |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 417 | } |
| 418 | |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 419 | void l2cap_chan_close(struct l2cap_chan *chan, int reason) |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 420 | { |
| 421 | struct l2cap_conn *conn = chan->conn; |
| 422 | struct sock *sk = chan->sk; |
| 423 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 424 | BT_DBG("chan %p state %d socket %p", chan, chan->state, sk->sk_socket); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 425 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 426 | switch (chan->state) { |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 427 | case BT_LISTEN: |
| 428 | l2cap_chan_cleanup_listen(sk); |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 429 | |
| 430 | l2cap_state_change(chan, BT_CLOSED); |
| 431 | sock_set_flag(sk, SOCK_ZAPPED); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 432 | break; |
| 433 | |
| 434 | case BT_CONNECTED: |
| 435 | case BT_CONFIG: |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 436 | if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 437 | conn->hcon->type == ACL_LINK) { |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 438 | __clear_chan_timer(chan); |
| 439 | __set_chan_timer(chan, sk->sk_sndtimeo); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 440 | l2cap_send_disconn_req(conn, chan, reason); |
| 441 | } else |
| 442 | l2cap_chan_del(chan, reason); |
| 443 | break; |
| 444 | |
| 445 | case BT_CONNECT2: |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 446 | if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 447 | conn->hcon->type == ACL_LINK) { |
| 448 | struct l2cap_conn_rsp rsp; |
| 449 | __u16 result; |
| 450 | |
| 451 | if (bt_sk(sk)->defer_setup) |
| 452 | result = L2CAP_CR_SEC_BLOCK; |
| 453 | else |
| 454 | result = L2CAP_CR_BAD_PSM; |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 455 | l2cap_state_change(chan, BT_DISCONN); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 456 | |
| 457 | rsp.scid = cpu_to_le16(chan->dcid); |
| 458 | rsp.dcid = cpu_to_le16(chan->scid); |
| 459 | rsp.result = cpu_to_le16(result); |
| 460 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 461 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, |
| 462 | sizeof(rsp), &rsp); |
| 463 | } |
| 464 | |
| 465 | l2cap_chan_del(chan, reason); |
| 466 | break; |
| 467 | |
| 468 | case BT_CONNECT: |
| 469 | case BT_DISCONN: |
| 470 | l2cap_chan_del(chan, reason); |
| 471 | break; |
| 472 | |
| 473 | default: |
| 474 | sock_set_flag(sk, SOCK_ZAPPED); |
| 475 | break; |
| 476 | } |
| 477 | } |
| 478 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 479 | static inline u8 l2cap_get_auth_type(struct l2cap_chan *chan) |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 480 | { |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 481 | if (chan->chan_type == L2CAP_CHAN_RAW) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 482 | switch (chan->sec_level) { |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 483 | case BT_SECURITY_HIGH: |
| 484 | return HCI_AT_DEDICATED_BONDING_MITM; |
| 485 | case BT_SECURITY_MEDIUM: |
| 486 | return HCI_AT_DEDICATED_BONDING; |
| 487 | default: |
| 488 | return HCI_AT_NO_BONDING; |
| 489 | } |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 490 | } else if (chan->psm == cpu_to_le16(0x0001)) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 491 | if (chan->sec_level == BT_SECURITY_LOW) |
| 492 | chan->sec_level = BT_SECURITY_SDP; |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 493 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 494 | if (chan->sec_level == BT_SECURITY_HIGH) |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 495 | return HCI_AT_NO_BONDING_MITM; |
| 496 | else |
| 497 | return HCI_AT_NO_BONDING; |
| 498 | } else { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 499 | switch (chan->sec_level) { |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 500 | case BT_SECURITY_HIGH: |
| 501 | return HCI_AT_GENERAL_BONDING_MITM; |
| 502 | case BT_SECURITY_MEDIUM: |
| 503 | return HCI_AT_GENERAL_BONDING; |
| 504 | default: |
| 505 | return HCI_AT_NO_BONDING; |
| 506 | } |
| 507 | } |
| 508 | } |
| 509 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 510 | /* Service level security */ |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 511 | static inline int l2cap_check_security(struct l2cap_chan *chan) |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 512 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 513 | struct l2cap_conn *conn = chan->conn; |
Marcel Holtmann | 0684e5f | 2009-02-09 02:48:38 +0100 | [diff] [blame] | 514 | __u8 auth_type; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 515 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 516 | auth_type = l2cap_get_auth_type(chan); |
Marcel Holtmann | 0684e5f | 2009-02-09 02:48:38 +0100 | [diff] [blame] | 517 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 518 | return hci_conn_security(conn->hcon, chan->sec_level, auth_type); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 519 | } |
| 520 | |
Johannes Berg | b5ad8b7 | 2011-06-01 08:54:45 +0200 | [diff] [blame] | 521 | static u8 l2cap_get_ident(struct l2cap_conn *conn) |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 522 | { |
| 523 | u8 id; |
| 524 | |
| 525 | /* Get next available identificator. |
| 526 | * 1 - 128 are used by kernel. |
| 527 | * 129 - 199 are reserved. |
| 528 | * 200 - 254 are used by utilities like l2ping, etc. |
| 529 | */ |
| 530 | |
| 531 | spin_lock_bh(&conn->lock); |
| 532 | |
| 533 | if (++conn->tx_ident > 128) |
| 534 | conn->tx_ident = 1; |
| 535 | |
| 536 | id = conn->tx_ident; |
| 537 | |
| 538 | spin_unlock_bh(&conn->lock); |
| 539 | |
| 540 | return id; |
| 541 | } |
| 542 | |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 543 | 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] | 544 | { |
| 545 | struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 546 | u8 flags; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 547 | |
| 548 | BT_DBG("code 0x%2.2x", code); |
| 549 | |
| 550 | if (!skb) |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 551 | return; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 552 | |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 553 | if (lmp_no_flush_capable(conn->hcon->hdev)) |
| 554 | flags = ACL_START_NO_FLUSH; |
| 555 | else |
| 556 | flags = ACL_START; |
| 557 | |
Jaikumar Ganesh | 14b12d0 | 2011-05-23 18:06:04 -0700 | [diff] [blame] | 558 | bt_cb(skb)->force_active = BT_POWER_FORCE_ACTIVE_ON; |
| 559 | |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 560 | hci_send_acl(conn->hcon, skb, flags); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 561 | } |
| 562 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 563 | static inline void l2cap_send_sframe(struct l2cap_chan *chan, u16 control) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 564 | { |
| 565 | struct sk_buff *skb; |
| 566 | struct l2cap_hdr *lh; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 567 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 568 | int count, hlen = L2CAP_HDR_SIZE + 2; |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 569 | u8 flags; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 570 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 571 | if (chan->state != BT_CONNECTED) |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 572 | return; |
| 573 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 574 | if (chan->fcs == L2CAP_FCS_CRC16) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 575 | hlen += 2; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 576 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 577 | BT_DBG("chan %p, control 0x%2.2x", chan, control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 578 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 579 | count = min_t(unsigned int, conn->mtu, hlen); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 580 | control |= L2CAP_CTRL_FRAME_TYPE; |
| 581 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 582 | if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state)) |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 583 | control |= L2CAP_CTRL_FINAL; |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 584 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 585 | if (test_and_clear_bit(CONN_SEND_PBIT, &chan->conn_state)) |
Gustavo F. Padovan | f0946cc | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 586 | control |= L2CAP_CTRL_POLL; |
Gustavo F. Padovan | f0946cc | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 587 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 588 | skb = bt_skb_alloc(count, GFP_ATOMIC); |
| 589 | if (!skb) |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 590 | return; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 591 | |
| 592 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 593 | lh->len = cpu_to_le16(hlen - L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 594 | lh->cid = cpu_to_le16(chan->dcid); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 595 | put_unaligned_le16(control, skb_put(skb, 2)); |
| 596 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 597 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 598 | u16 fcs = crc16(0, (u8 *)lh, count - 2); |
| 599 | put_unaligned_le16(fcs, skb_put(skb, 2)); |
| 600 | } |
| 601 | |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 602 | if (lmp_no_flush_capable(conn->hcon->hdev)) |
| 603 | flags = ACL_START_NO_FLUSH; |
| 604 | else |
| 605 | flags = ACL_START; |
| 606 | |
Jaikumar Ganesh | 14b12d0 | 2011-05-23 18:06:04 -0700 | [diff] [blame] | 607 | bt_cb(skb)->force_active = chan->force_active; |
| 608 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 609 | hci_send_acl(chan->conn->hcon, skb, flags); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 610 | } |
| 611 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 612 | static inline void l2cap_send_rr_or_rnr(struct l2cap_chan *chan, u16 control) |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 613 | { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 614 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 615 | control |= L2CAP_SUPER_RCV_NOT_READY; |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 616 | set_bit(CONN_RNR_SENT, &chan->conn_state); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 617 | } else |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 618 | control |= L2CAP_SUPER_RCV_READY; |
| 619 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 620 | control |= chan->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
Gustavo F. Padovan | 2ab25cd | 2009-10-03 02:34:40 -0300 | [diff] [blame] | 621 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 622 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 623 | } |
| 624 | |
Gustavo F. Padovan | b445003 | 2011-04-12 18:15:09 -0300 | [diff] [blame] | 625 | static inline int __l2cap_no_conn_pending(struct l2cap_chan *chan) |
Andrei Emeltchenko | e501d05 | 2010-07-08 12:14:41 +0300 | [diff] [blame] | 626 | { |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 627 | return !test_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Andrei Emeltchenko | e501d05 | 2010-07-08 12:14:41 +0300 | [diff] [blame] | 628 | } |
| 629 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 630 | static void l2cap_do_start(struct l2cap_chan *chan) |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 631 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 632 | struct l2cap_conn *conn = chan->conn; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 633 | |
| 634 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) { |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 635 | if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)) |
| 636 | return; |
| 637 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 638 | if (l2cap_check_security(chan) && |
| 639 | __l2cap_no_conn_pending(chan)) { |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 640 | struct l2cap_conn_req req; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 641 | req.scid = cpu_to_le16(chan->scid); |
| 642 | req.psm = chan->psm; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 643 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 644 | chan->ident = l2cap_get_ident(conn); |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 645 | set_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 646 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 647 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_REQ, |
| 648 | sizeof(req), &req); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 649 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 650 | } else { |
| 651 | struct l2cap_info_req req; |
| 652 | req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 653 | |
| 654 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; |
| 655 | conn->info_ident = l2cap_get_ident(conn); |
| 656 | |
| 657 | mod_timer(&conn->info_timer, jiffies + |
| 658 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); |
| 659 | |
| 660 | l2cap_send_cmd(conn, conn->info_ident, |
| 661 | L2CAP_INFO_REQ, sizeof(req), &req); |
| 662 | } |
| 663 | } |
| 664 | |
Gustavo F. Padovan | cf6c2c0 | 2010-06-07 20:54:45 -0300 | [diff] [blame] | 665 | static inline int l2cap_mode_supported(__u8 mode, __u32 feat_mask) |
| 666 | { |
| 667 | u32 local_feat_mask = l2cap_feat_mask; |
Gustavo F. Padovan | d1c4a17 | 2010-07-18 16:25:54 -0300 | [diff] [blame] | 668 | if (!disable_ertm) |
Gustavo F. Padovan | cf6c2c0 | 2010-06-07 20:54:45 -0300 | [diff] [blame] | 669 | local_feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING; |
| 670 | |
| 671 | switch (mode) { |
| 672 | case L2CAP_MODE_ERTM: |
| 673 | return L2CAP_FEAT_ERTM & feat_mask & local_feat_mask; |
| 674 | case L2CAP_MODE_STREAMING: |
| 675 | return L2CAP_FEAT_STREAMING & feat_mask & local_feat_mask; |
| 676 | default: |
| 677 | return 0x00; |
| 678 | } |
| 679 | } |
| 680 | |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 681 | 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] | 682 | { |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 683 | struct sock *sk; |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 684 | struct l2cap_disconn_req req; |
| 685 | |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 686 | if (!conn) |
| 687 | return; |
| 688 | |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 689 | sk = chan->sk; |
| 690 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 691 | if (chan->mode == L2CAP_MODE_ERTM) { |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 692 | __clear_retrans_timer(chan); |
| 693 | __clear_monitor_timer(chan); |
| 694 | __clear_ack_timer(chan); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 695 | } |
| 696 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 697 | req.dcid = cpu_to_le16(chan->dcid); |
| 698 | req.scid = cpu_to_le16(chan->scid); |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 699 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
| 700 | L2CAP_DISCONN_REQ, sizeof(req), &req); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 701 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 702 | l2cap_state_change(chan, BT_DISCONN); |
Gustavo F. Padovan | 9b108fc | 2010-05-20 16:21:53 -0300 | [diff] [blame] | 703 | sk->sk_err = err; |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 704 | } |
| 705 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | /* ---- L2CAP connections ---- */ |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 707 | static void l2cap_conn_start(struct l2cap_conn *conn) |
| 708 | { |
Gustavo F. Padovan | 820ffdb | 2011-04-01 00:35:21 -0300 | [diff] [blame] | 709 | struct l2cap_chan *chan, *tmp; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 710 | |
| 711 | BT_DBG("conn %p", conn); |
| 712 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 713 | read_lock(&conn->chan_lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 714 | |
Gustavo F. Padovan | 820ffdb | 2011-04-01 00:35:21 -0300 | [diff] [blame] | 715 | list_for_each_entry_safe(chan, tmp, &conn->chan_l, list) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 716 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 717 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 718 | bh_lock_sock(sk); |
| 719 | |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 720 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 721 | bh_unlock_sock(sk); |
| 722 | continue; |
| 723 | } |
| 724 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 725 | if (chan->state == BT_CONNECT) { |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 726 | struct l2cap_conn_req req; |
Gustavo F. Padovan | cf6c2c0 | 2010-06-07 20:54:45 -0300 | [diff] [blame] | 727 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 728 | if (!l2cap_check_security(chan) || |
Gustavo F. Padovan | b445003 | 2011-04-12 18:15:09 -0300 | [diff] [blame] | 729 | !__l2cap_no_conn_pending(chan)) { |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 730 | bh_unlock_sock(sk); |
| 731 | continue; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 732 | } |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 733 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 734 | if (!l2cap_mode_supported(chan->mode, conn->feat_mask) |
| 735 | && test_bit(CONF_STATE2_DEVICE, |
| 736 | &chan->conf_state)) { |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 737 | /* l2cap_chan_close() calls list_del(chan) |
Gustavo F. Padovan | 820ffdb | 2011-04-01 00:35:21 -0300 | [diff] [blame] | 738 | * so release the lock */ |
Gustavo F. Padovan | 2461daa | 2011-06-17 12:57:25 -0300 | [diff] [blame] | 739 | read_unlock(&conn->chan_lock); |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 740 | l2cap_chan_close(chan, ECONNRESET); |
Gustavo F. Padovan | 2461daa | 2011-06-17 12:57:25 -0300 | [diff] [blame] | 741 | read_lock(&conn->chan_lock); |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 742 | bh_unlock_sock(sk); |
| 743 | continue; |
| 744 | } |
| 745 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 746 | req.scid = cpu_to_le16(chan->scid); |
| 747 | req.psm = chan->psm; |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 748 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 749 | chan->ident = l2cap_get_ident(conn); |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 750 | set_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 751 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 752 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_REQ, |
| 753 | sizeof(req), &req); |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 754 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 755 | } else if (chan->state == BT_CONNECT2) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 756 | struct l2cap_conn_rsp rsp; |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 757 | char buf[128]; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 758 | rsp.scid = cpu_to_le16(chan->dcid); |
| 759 | rsp.dcid = cpu_to_le16(chan->scid); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 760 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 761 | if (l2cap_check_security(chan)) { |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 762 | if (bt_sk(sk)->defer_setup) { |
| 763 | struct sock *parent = bt_sk(sk)->parent; |
| 764 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); |
| 765 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHOR_PEND); |
Ilia Kolomisnky | 05e9a2f | 2011-07-15 18:30:21 +0000 | [diff] [blame] | 766 | if (parent) |
| 767 | parent->sk_data_ready(parent, 0); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 768 | |
| 769 | } else { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 770 | l2cap_state_change(chan, BT_CONFIG); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 771 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); |
| 772 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 773 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 774 | } else { |
| 775 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); |
| 776 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHEN_PEND); |
| 777 | } |
| 778 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 779 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, |
| 780 | sizeof(rsp), &rsp); |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 781 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 782 | if (test_bit(CONF_REQ_SENT, &chan->conf_state) || |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 783 | rsp.result != L2CAP_CR_SUCCESS) { |
| 784 | bh_unlock_sock(sk); |
| 785 | continue; |
| 786 | } |
| 787 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 788 | set_bit(CONF_REQ_SENT, &chan->conf_state); |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 789 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 790 | l2cap_build_conf_req(chan, buf), buf); |
| 791 | chan->num_conf_req++; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 792 | } |
| 793 | |
| 794 | bh_unlock_sock(sk); |
| 795 | } |
| 796 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 797 | read_unlock(&conn->chan_lock); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 798 | } |
| 799 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 800 | /* Find socket with cid and source bdaddr. |
| 801 | * Returns closest match, locked. |
| 802 | */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 803 | static struct l2cap_chan *l2cap_global_chan_by_scid(int state, __le16 cid, bdaddr_t *src) |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 804 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 805 | struct l2cap_chan *c, *c1 = NULL; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 806 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 807 | read_lock(&chan_list_lock); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 808 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 809 | list_for_each_entry(c, &chan_list, global_l) { |
| 810 | struct sock *sk = c->sk; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 811 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 812 | if (state && c->state != state) |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 813 | continue; |
| 814 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 815 | if (c->scid == cid) { |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 816 | /* Exact match. */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 817 | if (!bacmp(&bt_sk(sk)->src, src)) { |
| 818 | read_unlock(&chan_list_lock); |
| 819 | return c; |
| 820 | } |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 821 | |
| 822 | /* Closest match */ |
| 823 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 824 | c1 = c; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 825 | } |
| 826 | } |
Gustavo F. Padovan | 280f294 | 2011-04-13 19:01:22 -0300 | [diff] [blame] | 827 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 828 | read_unlock(&chan_list_lock); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 829 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 830 | return c1; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 831 | } |
| 832 | |
| 833 | static void l2cap_le_conn_ready(struct l2cap_conn *conn) |
| 834 | { |
Gustavo F. Padovan | c916fbe | 2011-04-04 16:00:55 -0300 | [diff] [blame] | 835 | struct sock *parent, *sk; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 836 | struct l2cap_chan *chan, *pchan; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 837 | |
| 838 | BT_DBG(""); |
| 839 | |
| 840 | /* Check if we have socket listening on cid */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 841 | pchan = l2cap_global_chan_by_scid(BT_LISTEN, L2CAP_CID_LE_DATA, |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 842 | conn->src); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 843 | if (!pchan) |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 844 | return; |
| 845 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 846 | parent = pchan->sk; |
| 847 | |
Gustavo F. Padovan | 62f3a2c | 2011-04-14 18:34:34 -0300 | [diff] [blame] | 848 | bh_lock_sock(parent); |
| 849 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 850 | /* Check for backlog size */ |
| 851 | if (sk_acceptq_is_full(parent)) { |
| 852 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
| 853 | goto clean; |
| 854 | } |
| 855 | |
Gustavo F. Padovan | 80808e4 | 2011-05-16 17:24:37 -0300 | [diff] [blame] | 856 | chan = pchan->ops->new_connection(pchan->data); |
| 857 | if (!chan) |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 858 | goto clean; |
| 859 | |
Gustavo F. Padovan | 80808e4 | 2011-05-16 17:24:37 -0300 | [diff] [blame] | 860 | sk = chan->sk; |
Gustavo F. Padovan | 5d41ce1 | 2011-04-08 15:40:02 -0300 | [diff] [blame] | 861 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 862 | write_lock_bh(&conn->chan_lock); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 863 | |
| 864 | hci_conn_hold(conn->hcon); |
| 865 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 866 | bacpy(&bt_sk(sk)->src, conn->src); |
| 867 | bacpy(&bt_sk(sk)->dst, conn->dst); |
| 868 | |
Gustavo F. Padovan | d101024 | 2011-03-25 00:39:48 -0300 | [diff] [blame] | 869 | bt_accept_enqueue(parent, sk); |
| 870 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 871 | __l2cap_chan_add(conn, chan); |
| 872 | |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 873 | __set_chan_timer(chan, sk->sk_sndtimeo); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 874 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 875 | l2cap_state_change(chan, BT_CONNECTED); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 876 | parent->sk_data_ready(parent, 0); |
| 877 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 878 | write_unlock_bh(&conn->chan_lock); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 879 | |
| 880 | clean: |
| 881 | bh_unlock_sock(parent); |
| 882 | } |
| 883 | |
Vinicius Costa Gomes | f1cb9af | 2011-01-26 21:42:57 -0300 | [diff] [blame] | 884 | static void l2cap_chan_ready(struct sock *sk) |
| 885 | { |
| 886 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
| 887 | struct sock *parent = bt_sk(sk)->parent; |
| 888 | |
| 889 | BT_DBG("sk %p, parent %p", sk, parent); |
| 890 | |
| 891 | chan->conf_state = 0; |
| 892 | __clear_chan_timer(chan); |
| 893 | |
Vinicius Costa Gomes | 43f3dc4 | 2011-06-20 18:53:18 -0300 | [diff] [blame] | 894 | l2cap_state_change(chan, BT_CONNECTED); |
Vinicius Costa Gomes | f1cb9af | 2011-01-26 21:42:57 -0300 | [diff] [blame] | 895 | sk->sk_state_change(sk); |
| 896 | |
| 897 | if (parent) |
| 898 | parent->sk_data_ready(parent, 0); |
| 899 | } |
| 900 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 901 | static void l2cap_conn_ready(struct l2cap_conn *conn) |
| 902 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 903 | struct l2cap_chan *chan; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 904 | |
| 905 | BT_DBG("conn %p", conn); |
| 906 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 907 | if (!conn->hcon->out && conn->hcon->type == LE_LINK) |
| 908 | l2cap_le_conn_ready(conn); |
| 909 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 910 | read_lock(&conn->chan_lock); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 911 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 912 | list_for_each_entry(chan, &conn->chan_l, list) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 913 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 914 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 915 | bh_lock_sock(sk); |
| 916 | |
Vinicius Costa Gomes | 6312845 | 2011-06-17 22:46:26 -0300 | [diff] [blame] | 917 | if (conn->hcon->type == LE_LINK) { |
Anderson Briglia | b501d6a | 2011-06-07 18:46:31 -0300 | [diff] [blame] | 918 | if (smp_conn_security(conn, chan->sec_level)) |
Vinicius Costa Gomes | f1cb9af | 2011-01-26 21:42:57 -0300 | [diff] [blame] | 919 | l2cap_chan_ready(sk); |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 920 | |
Vinicius Costa Gomes | 6312845 | 2011-06-17 22:46:26 -0300 | [diff] [blame] | 921 | } else if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 922 | __clear_chan_timer(chan); |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 923 | l2cap_state_change(chan, BT_CONNECTED); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 924 | sk->sk_state_change(sk); |
Anderson Briglia | b501d6a | 2011-06-07 18:46:31 -0300 | [diff] [blame] | 925 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 926 | } else if (chan->state == BT_CONNECT) |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 927 | l2cap_do_start(chan); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 928 | |
| 929 | bh_unlock_sock(sk); |
| 930 | } |
| 931 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 932 | read_unlock(&conn->chan_lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 933 | } |
| 934 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 935 | /* Notify sockets that we cannot guaranty reliability anymore */ |
| 936 | static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) |
| 937 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 938 | struct l2cap_chan *chan; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 939 | |
| 940 | BT_DBG("conn %p", conn); |
| 941 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 942 | read_lock(&conn->chan_lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 943 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 944 | list_for_each_entry(chan, &conn->chan_l, list) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 945 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 946 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 947 | if (chan->force_reliable) |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 948 | sk->sk_err = err; |
| 949 | } |
| 950 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 951 | read_unlock(&conn->chan_lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 952 | } |
| 953 | |
| 954 | static void l2cap_info_timeout(unsigned long arg) |
| 955 | { |
| 956 | struct l2cap_conn *conn = (void *) arg; |
| 957 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 958 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 959 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 960 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 961 | l2cap_conn_start(conn); |
| 962 | } |
| 963 | |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 964 | static void l2cap_conn_del(struct hci_conn *hcon, int err) |
| 965 | { |
| 966 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 967 | struct l2cap_chan *chan, *l; |
| 968 | struct sock *sk; |
| 969 | |
| 970 | if (!conn) |
| 971 | return; |
| 972 | |
| 973 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); |
| 974 | |
| 975 | kfree_skb(conn->rx_skb); |
| 976 | |
| 977 | /* Kill channels */ |
| 978 | list_for_each_entry_safe(chan, l, &conn->chan_l, list) { |
| 979 | sk = chan->sk; |
| 980 | bh_lock_sock(sk); |
| 981 | l2cap_chan_del(chan, err); |
| 982 | bh_unlock_sock(sk); |
| 983 | chan->ops->close(chan->data); |
| 984 | } |
| 985 | |
| 986 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) |
| 987 | del_timer_sync(&conn->info_timer); |
| 988 | |
| 989 | if (test_bit(HCI_CONN_ENCRYPT_PEND, &hcon->pend)) |
| 990 | del_timer(&conn->security_timer); |
| 991 | |
| 992 | hcon->l2cap_data = NULL; |
| 993 | kfree(conn); |
| 994 | } |
| 995 | |
| 996 | static void security_timeout(unsigned long arg) |
| 997 | { |
| 998 | struct l2cap_conn *conn = (void *) arg; |
| 999 | |
| 1000 | l2cap_conn_del(conn->hcon, ETIMEDOUT); |
| 1001 | } |
| 1002 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) |
| 1004 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 1005 | struct l2cap_conn *conn = hcon->l2cap_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 1007 | if (conn || status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | return conn; |
| 1009 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 1010 | conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC); |
| 1011 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | |
| 1014 | hcon->l2cap_data = conn; |
| 1015 | conn->hcon = hcon; |
| 1016 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 1017 | BT_DBG("hcon %p conn %p", hcon, conn); |
| 1018 | |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 1019 | if (hcon->hdev->le_mtu && hcon->type == LE_LINK) |
| 1020 | conn->mtu = hcon->hdev->le_mtu; |
| 1021 | else |
| 1022 | conn->mtu = hcon->hdev->acl_mtu; |
| 1023 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | conn->src = &hcon->hdev->bdaddr; |
| 1025 | conn->dst = &hcon->dst; |
| 1026 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1027 | conn->feat_mask = 0; |
| 1028 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | spin_lock_init(&conn->lock); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1030 | rwlock_init(&conn->chan_lock); |
| 1031 | |
| 1032 | INIT_LIST_HEAD(&conn->chan_l); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1034 | if (hcon->type == LE_LINK) |
| 1035 | setup_timer(&conn->security_timer, security_timeout, |
| 1036 | (unsigned long) conn); |
| 1037 | else |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1038 | setup_timer(&conn->info_timer, l2cap_info_timeout, |
Dave Young | 45054dc | 2009-10-18 20:28:30 +0000 | [diff] [blame] | 1039 | (unsigned long) conn); |
| 1040 | |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 1041 | conn->disc_reason = 0x13; |
| 1042 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | return conn; |
| 1044 | } |
| 1045 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1046 | static inline void l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1048 | write_lock_bh(&conn->chan_lock); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1049 | __l2cap_chan_add(conn, chan); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1050 | write_unlock_bh(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | } |
| 1052 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | /* ---- Socket interface ---- */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | |
| 1055 | /* Find socket with psm and source bdaddr. |
| 1056 | * Returns closest match. |
| 1057 | */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1058 | static struct l2cap_chan *l2cap_global_chan_by_psm(int state, __le16 psm, bdaddr_t *src) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1060 | struct l2cap_chan *c, *c1 = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1062 | read_lock(&chan_list_lock); |
Gustavo F. Padovan | e0f0cb5 | 2010-11-01 18:43:53 +0000 | [diff] [blame] | 1063 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1064 | list_for_each_entry(c, &chan_list, global_l) { |
| 1065 | struct sock *sk = c->sk; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1066 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1067 | if (state && c->state != state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | continue; |
| 1069 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1070 | if (c->psm == psm) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | /* Exact match. */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1072 | if (!bacmp(&bt_sk(sk)->src, src)) { |
Johannes Berg | a7567b2 | 2011-06-01 08:29:54 +0200 | [diff] [blame] | 1073 | read_unlock(&chan_list_lock); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1074 | return c; |
| 1075 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | |
| 1077 | /* Closest match */ |
| 1078 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1079 | c1 = c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | } |
| 1081 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1083 | read_unlock(&chan_list_lock); |
Gustavo F. Padovan | e0f0cb5 | 2010-11-01 18:43:53 +0000 | [diff] [blame] | 1084 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1085 | return c1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | } |
| 1087 | |
Gustavo F. Padovan | 77a74c7 | 2011-04-12 18:17:14 -0300 | [diff] [blame] | 1088 | int l2cap_chan_connect(struct l2cap_chan *chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | { |
Gustavo F. Padovan | 5d41ce1 | 2011-04-08 15:40:02 -0300 | [diff] [blame] | 1090 | struct sock *sk = chan->sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | bdaddr_t *src = &bt_sk(sk)->src; |
| 1092 | bdaddr_t *dst = &bt_sk(sk)->dst; |
| 1093 | struct l2cap_conn *conn; |
| 1094 | struct hci_conn *hcon; |
| 1095 | struct hci_dev *hdev; |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 1096 | __u8 auth_type; |
Marcel Holtmann | 44d0e48 | 2009-04-20 07:09:16 +0200 | [diff] [blame] | 1097 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1099 | BT_DBG("%s -> %s psm 0x%2.2x", batostr(src), batostr(dst), |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1100 | chan->psm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 1102 | hdev = hci_get_route(dst, src); |
| 1103 | if (!hdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | return -EHOSTUNREACH; |
| 1105 | |
| 1106 | hci_dev_lock_bh(hdev); |
| 1107 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1108 | auth_type = l2cap_get_auth_type(chan); |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 1109 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1110 | if (chan->dcid == L2CAP_CID_LE_DATA) |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 1111 | hcon = hci_connect(hdev, LE_LINK, dst, |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1112 | chan->sec_level, auth_type); |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 1113 | else |
| 1114 | hcon = hci_connect(hdev, ACL_LINK, dst, |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1115 | chan->sec_level, auth_type); |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 1116 | |
Ville Tervo | 30e7627 | 2011-02-22 16:10:53 -0300 | [diff] [blame] | 1117 | if (IS_ERR(hcon)) { |
| 1118 | err = PTR_ERR(hcon); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | goto done; |
Ville Tervo | 30e7627 | 2011-02-22 16:10:53 -0300 | [diff] [blame] | 1120 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | |
| 1122 | conn = l2cap_conn_add(hcon, 0); |
| 1123 | if (!conn) { |
| 1124 | hci_conn_put(hcon); |
Ville Tervo | 30e7627 | 2011-02-22 16:10:53 -0300 | [diff] [blame] | 1125 | err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | goto done; |
| 1127 | } |
| 1128 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | /* Update source addr of the socket */ |
| 1130 | bacpy(src, conn->src); |
| 1131 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1132 | l2cap_chan_add(conn, chan); |
| 1133 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1134 | l2cap_state_change(chan, BT_CONNECT); |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 1135 | __set_chan_timer(chan, sk->sk_sndtimeo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | |
| 1137 | if (hcon->state == BT_CONNECTED) { |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 1138 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 1139 | __clear_chan_timer(chan); |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1140 | if (l2cap_check_security(chan)) |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1141 | l2cap_state_change(chan, BT_CONNECTED); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1142 | } else |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 1143 | l2cap_do_start(chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | } |
| 1145 | |
Ville Tervo | 30e7627 | 2011-02-22 16:10:53 -0300 | [diff] [blame] | 1146 | err = 0; |
| 1147 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | done: |
| 1149 | hci_dev_unlock_bh(hdev); |
| 1150 | hci_dev_put(hdev); |
| 1151 | return err; |
| 1152 | } |
| 1153 | |
Gustavo F. Padovan | dcba0db | 2011-02-04 03:08:36 -0200 | [diff] [blame] | 1154 | int __l2cap_wait_ack(struct sock *sk) |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1155 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1156 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1157 | DECLARE_WAITQUEUE(wait, current); |
| 1158 | int err = 0; |
| 1159 | int timeo = HZ/5; |
| 1160 | |
Marcel Holtmann | 2b0b05d | 2010-05-10 11:33:10 +0200 | [diff] [blame] | 1161 | add_wait_queue(sk_sleep(sk), &wait); |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1162 | while ((chan->unacked_frames > 0 && chan->conn)) { |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1163 | set_current_state(TASK_INTERRUPTIBLE); |
| 1164 | |
| 1165 | if (!timeo) |
| 1166 | timeo = HZ/5; |
| 1167 | |
| 1168 | if (signal_pending(current)) { |
| 1169 | err = sock_intr_errno(timeo); |
| 1170 | break; |
| 1171 | } |
| 1172 | |
| 1173 | release_sock(sk); |
| 1174 | timeo = schedule_timeout(timeo); |
| 1175 | lock_sock(sk); |
| 1176 | |
| 1177 | err = sock_error(sk); |
| 1178 | if (err) |
| 1179 | break; |
| 1180 | } |
| 1181 | set_current_state(TASK_RUNNING); |
Marcel Holtmann | 2b0b05d | 2010-05-10 11:33:10 +0200 | [diff] [blame] | 1182 | remove_wait_queue(sk_sleep(sk), &wait); |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1183 | return err; |
| 1184 | } |
| 1185 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1186 | static void l2cap_monitor_timeout(unsigned long arg) |
| 1187 | { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1188 | struct l2cap_chan *chan = (void *) arg; |
| 1189 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1190 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1191 | BT_DBG("chan %p", chan); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 1192 | |
Gustavo F. Padovan | e686219 | 2009-08-24 00:45:19 -0300 | [diff] [blame] | 1193 | bh_lock_sock(sk); |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1194 | if (chan->retry_count >= chan->remote_max_tx) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1195 | l2cap_send_disconn_req(chan->conn, chan, ECONNABORTED); |
Andrei Emeltchenko | b13f586 | 2009-12-15 11:38:04 +0200 | [diff] [blame] | 1196 | bh_unlock_sock(sk); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1197 | return; |
| 1198 | } |
| 1199 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1200 | chan->retry_count++; |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 1201 | __set_monitor_timer(chan); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1202 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1203 | l2cap_send_rr_or_rnr(chan, L2CAP_CTRL_POLL); |
Gustavo F. Padovan | e686219 | 2009-08-24 00:45:19 -0300 | [diff] [blame] | 1204 | bh_unlock_sock(sk); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1205 | } |
| 1206 | |
| 1207 | static void l2cap_retrans_timeout(unsigned long arg) |
| 1208 | { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1209 | struct l2cap_chan *chan = (void *) arg; |
| 1210 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1211 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 1212 | BT_DBG("chan %p", chan); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 1213 | |
Gustavo F. Padovan | e686219 | 2009-08-24 00:45:19 -0300 | [diff] [blame] | 1214 | bh_lock_sock(sk); |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1215 | chan->retry_count = 1; |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 1216 | __set_monitor_timer(chan); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1217 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1218 | set_bit(CONN_WAIT_F, &chan->conn_state); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1219 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1220 | l2cap_send_rr_or_rnr(chan, L2CAP_CTRL_POLL); |
Gustavo F. Padovan | e686219 | 2009-08-24 00:45:19 -0300 | [diff] [blame] | 1221 | bh_unlock_sock(sk); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1222 | } |
| 1223 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1224 | static void l2cap_drop_acked_frames(struct l2cap_chan *chan) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1225 | { |
| 1226 | struct sk_buff *skb; |
| 1227 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1228 | while ((skb = skb_peek(&chan->tx_q)) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1229 | chan->unacked_frames) { |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1230 | if (bt_cb(skb)->tx_seq == chan->expected_ack_seq) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1231 | break; |
| 1232 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1233 | skb = skb_dequeue(&chan->tx_q); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1234 | kfree_skb(skb); |
| 1235 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1236 | chan->unacked_frames--; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1237 | } |
| 1238 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1239 | if (!chan->unacked_frames) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 1240 | __clear_retrans_timer(chan); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1241 | } |
| 1242 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1243 | void l2cap_do_send(struct l2cap_chan *chan, struct sk_buff *skb) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1244 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1245 | struct hci_conn *hcon = chan->conn->hcon; |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 1246 | u16 flags; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1247 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1248 | BT_DBG("chan %p, skb %p len %d", chan, skb, skb->len); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1249 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1250 | if (!chan->flushable && lmp_no_flush_capable(hcon->hdev)) |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 1251 | flags = ACL_START_NO_FLUSH; |
| 1252 | else |
| 1253 | flags = ACL_START; |
| 1254 | |
Jaikumar Ganesh | 14b12d0 | 2011-05-23 18:06:04 -0700 | [diff] [blame] | 1255 | bt_cb(skb)->force_active = chan->force_active; |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 1256 | hci_send_acl(hcon, skb, flags); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1257 | } |
| 1258 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1259 | void l2cap_streaming_send(struct l2cap_chan *chan) |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1260 | { |
Gustavo F. Padovan | ccbb84a | 2010-08-30 18:44:44 -0300 | [diff] [blame] | 1261 | struct sk_buff *skb; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1262 | u16 control, fcs; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1263 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1264 | while ((skb = skb_dequeue(&chan->tx_q))) { |
Gustavo F. Padovan | ccbb84a | 2010-08-30 18:44:44 -0300 | [diff] [blame] | 1265 | control = get_unaligned_le16(skb->data + L2CAP_HDR_SIZE); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1266 | control |= chan->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT; |
Gustavo F. Padovan | ccbb84a | 2010-08-30 18:44:44 -0300 | [diff] [blame] | 1267 | put_unaligned_le16(control, skb->data + L2CAP_HDR_SIZE); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1268 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1269 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Gustavo F. Padovan | ccbb84a | 2010-08-30 18:44:44 -0300 | [diff] [blame] | 1270 | fcs = crc16(0, (u8 *)skb->data, skb->len - 2); |
| 1271 | put_unaligned_le16(fcs, skb->data + skb->len - 2); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1272 | } |
| 1273 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1274 | l2cap_do_send(chan, skb); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1275 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1276 | chan->next_tx_seq = (chan->next_tx_seq + 1) % 64; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1277 | } |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1278 | } |
| 1279 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1280 | static void l2cap_retransmit_one_frame(struct l2cap_chan *chan, u8 tx_seq) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1281 | { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1282 | struct sk_buff *skb, *tx_skb; |
| 1283 | u16 control, fcs; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1284 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1285 | skb = skb_peek(&chan->tx_q); |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1286 | if (!skb) |
| 1287 | return; |
| 1288 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1289 | do { |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1290 | if (bt_cb(skb)->tx_seq == tx_seq) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1291 | break; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1292 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1293 | if (skb_queue_is_last(&chan->tx_q, skb)) |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1294 | return; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1295 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1296 | } while ((skb = skb_queue_next(&chan->tx_q, skb))); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1297 | |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1298 | if (chan->remote_max_tx && |
| 1299 | bt_cb(skb)->retries == chan->remote_max_tx) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1300 | l2cap_send_disconn_req(chan->conn, chan, ECONNABORTED); |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1301 | return; |
| 1302 | } |
| 1303 | |
| 1304 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
| 1305 | bt_cb(skb)->retries++; |
| 1306 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); |
Ruiyi Zhang | a429b51 | 2011-04-18 11:04:30 +0800 | [diff] [blame] | 1307 | control &= L2CAP_CTRL_SAR; |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 1308 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1309 | if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state)) |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 1310 | control |= L2CAP_CTRL_FINAL; |
Gustavo F. Padovan | 95ffa97 | 2010-06-18 20:37:33 -0300 | [diff] [blame] | 1311 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1312 | control |= (chan->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT) |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1313 | | (tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 1314 | |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1315 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); |
| 1316 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1317 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1318 | fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2); |
| 1319 | put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2); |
| 1320 | } |
| 1321 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1322 | l2cap_do_send(chan, tx_skb); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1323 | } |
| 1324 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1325 | int l2cap_ertm_send(struct l2cap_chan *chan) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1326 | { |
| 1327 | struct sk_buff *skb, *tx_skb; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1328 | u16 control, fcs; |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1329 | int nsent = 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1330 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1331 | if (chan->state != BT_CONNECTED) |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 1332 | return -ENOTCONN; |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1333 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1334 | while ((skb = chan->tx_send_head) && (!l2cap_tx_window_full(chan))) { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1335 | |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1336 | if (chan->remote_max_tx && |
| 1337 | bt_cb(skb)->retries == chan->remote_max_tx) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1338 | l2cap_send_disconn_req(chan->conn, chan, ECONNABORTED); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1339 | break; |
| 1340 | } |
| 1341 | |
Andrei Emeltchenko | e420aba | 2009-12-23 13:07:14 +0200 | [diff] [blame] | 1342 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
| 1343 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1344 | bt_cb(skb)->retries++; |
| 1345 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1346 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); |
Gustavo F. Padovan | 95ffa97 | 2010-06-18 20:37:33 -0300 | [diff] [blame] | 1347 | control &= L2CAP_CTRL_SAR; |
| 1348 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1349 | if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state)) |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 1350 | control |= L2CAP_CTRL_FINAL; |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1351 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1352 | control |= (chan->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT) |
| 1353 | | (chan->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1354 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); |
| 1355 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1356 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1357 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1358 | fcs = crc16(0, (u8 *)skb->data, tx_skb->len - 2); |
| 1359 | put_unaligned_le16(fcs, skb->data + tx_skb->len - 2); |
| 1360 | } |
| 1361 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1362 | l2cap_do_send(chan, tx_skb); |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1363 | |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 1364 | __set_retrans_timer(chan); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1365 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1366 | bt_cb(skb)->tx_seq = chan->next_tx_seq; |
| 1367 | chan->next_tx_seq = (chan->next_tx_seq + 1) % 64; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1368 | |
Suraj Sumangala | 23e9fde | 2011-03-09 14:44:05 +0530 | [diff] [blame] | 1369 | if (bt_cb(skb)->retries == 1) |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1370 | chan->unacked_frames++; |
Suraj Sumangala | 23e9fde | 2011-03-09 14:44:05 +0530 | [diff] [blame] | 1371 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1372 | chan->frames_sent++; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1373 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1374 | if (skb_queue_is_last(&chan->tx_q, skb)) |
| 1375 | chan->tx_send_head = NULL; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1376 | else |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1377 | chan->tx_send_head = skb_queue_next(&chan->tx_q, skb); |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1378 | |
| 1379 | nsent++; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1380 | } |
| 1381 | |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1382 | return nsent; |
| 1383 | } |
| 1384 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1385 | static int l2cap_retransmit_frames(struct l2cap_chan *chan) |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1386 | { |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1387 | int ret; |
| 1388 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1389 | if (!skb_queue_empty(&chan->tx_q)) |
| 1390 | chan->tx_send_head = chan->tx_q.next; |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1391 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1392 | chan->next_tx_seq = chan->expected_ack_seq; |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1393 | ret = l2cap_ertm_send(chan); |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1394 | return ret; |
| 1395 | } |
| 1396 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1397 | static void l2cap_send_ack(struct l2cap_chan *chan) |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1398 | { |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1399 | u16 control = 0; |
| 1400 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1401 | control |= chan->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1402 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1403 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1404 | control |= L2CAP_SUPER_RCV_NOT_READY; |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1405 | set_bit(CONN_RNR_SENT, &chan->conn_state); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1406 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1407 | return; |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1408 | } |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1409 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1410 | if (l2cap_ertm_send(chan) > 0) |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1411 | return; |
| 1412 | |
| 1413 | control |= L2CAP_SUPER_RCV_READY; |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1414 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1415 | } |
| 1416 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1417 | static void l2cap_send_srejtail(struct l2cap_chan *chan) |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 1418 | { |
| 1419 | struct srej_list *tail; |
| 1420 | u16 control; |
| 1421 | |
| 1422 | control = L2CAP_SUPER_SELECT_REJECT; |
| 1423 | control |= L2CAP_CTRL_FINAL; |
| 1424 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 1425 | tail = list_entry((&chan->srej_l)->prev, struct srej_list, list); |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 1426 | control |= tail->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
| 1427 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1428 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 1429 | } |
| 1430 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1431 | static inline int l2cap_skbuff_fromiovec(struct sock *sk, struct msghdr *msg, int len, int count, struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1432 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1433 | struct l2cap_conn *conn = l2cap_pi(sk)->chan->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1434 | struct sk_buff **frag; |
| 1435 | int err, sent = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1436 | |
Gustavo F. Padovan | 59203a2 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1437 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1438 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | |
| 1440 | sent += count; |
| 1441 | len -= count; |
| 1442 | |
| 1443 | /* Continuation fragments (no L2CAP header) */ |
| 1444 | frag = &skb_shinfo(skb)->frag_list; |
| 1445 | while (len) { |
| 1446 | count = min_t(unsigned int, conn->mtu, len); |
| 1447 | |
| 1448 | *frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err); |
| 1449 | if (!*frag) |
Gustavo F. Padovan | 0175d62 | 2010-09-24 20:30:57 -0300 | [diff] [blame] | 1450 | return err; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1451 | if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) |
| 1452 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1453 | |
| 1454 | sent += count; |
| 1455 | len -= count; |
| 1456 | |
| 1457 | frag = &(*frag)->next; |
| 1458 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1459 | |
| 1460 | return sent; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1461 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1462 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1463 | struct sk_buff *l2cap_create_connless_pdu(struct l2cap_chan *chan, struct msghdr *msg, size_t len) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1464 | { |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1465 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1466 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1467 | struct sk_buff *skb; |
| 1468 | int err, count, hlen = L2CAP_HDR_SIZE + 2; |
| 1469 | struct l2cap_hdr *lh; |
| 1470 | |
| 1471 | BT_DBG("sk %p len %d", sk, (int)len); |
| 1472 | |
| 1473 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
| 1474 | skb = bt_skb_send_alloc(sk, count + hlen, |
| 1475 | msg->msg_flags & MSG_DONTWAIT, &err); |
| 1476 | if (!skb) |
Gustavo F. Padovan | 0175d62 | 2010-09-24 20:30:57 -0300 | [diff] [blame] | 1477 | return ERR_PTR(err); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1478 | |
| 1479 | /* Create L2CAP header */ |
| 1480 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1481 | lh->cid = cpu_to_le16(chan->dcid); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1482 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1483 | put_unaligned_le16(chan->psm, skb_put(skb, 2)); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1484 | |
| 1485 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); |
| 1486 | if (unlikely(err < 0)) { |
| 1487 | kfree_skb(skb); |
| 1488 | return ERR_PTR(err); |
| 1489 | } |
| 1490 | return skb; |
| 1491 | } |
| 1492 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1493 | struct sk_buff *l2cap_create_basic_pdu(struct l2cap_chan *chan, struct msghdr *msg, size_t len) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1494 | { |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1495 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1496 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1497 | struct sk_buff *skb; |
| 1498 | int err, count, hlen = L2CAP_HDR_SIZE; |
| 1499 | struct l2cap_hdr *lh; |
| 1500 | |
| 1501 | BT_DBG("sk %p len %d", sk, (int)len); |
| 1502 | |
| 1503 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
| 1504 | skb = bt_skb_send_alloc(sk, count + hlen, |
| 1505 | msg->msg_flags & MSG_DONTWAIT, &err); |
| 1506 | if (!skb) |
Gustavo F. Padovan | 0175d62 | 2010-09-24 20:30:57 -0300 | [diff] [blame] | 1507 | return ERR_PTR(err); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1508 | |
| 1509 | /* Create L2CAP header */ |
| 1510 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1511 | lh->cid = cpu_to_le16(chan->dcid); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1512 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); |
| 1513 | |
| 1514 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); |
| 1515 | if (unlikely(err < 0)) { |
| 1516 | kfree_skb(skb); |
| 1517 | return ERR_PTR(err); |
| 1518 | } |
| 1519 | return skb; |
| 1520 | } |
| 1521 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1522 | struct sk_buff *l2cap_create_iframe_pdu(struct l2cap_chan *chan, struct msghdr *msg, size_t len, u16 control, u16 sdulen) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1523 | { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1524 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1525 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1526 | struct sk_buff *skb; |
| 1527 | int err, count, hlen = L2CAP_HDR_SIZE + 2; |
| 1528 | struct l2cap_hdr *lh; |
| 1529 | |
| 1530 | BT_DBG("sk %p len %d", sk, (int)len); |
| 1531 | |
Gustavo F. Padovan | 0ee0d20 | 2010-05-01 16:15:41 -0300 | [diff] [blame] | 1532 | if (!conn) |
| 1533 | return ERR_PTR(-ENOTCONN); |
| 1534 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1535 | if (sdulen) |
| 1536 | hlen += 2; |
| 1537 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1538 | if (chan->fcs == L2CAP_FCS_CRC16) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1539 | hlen += 2; |
| 1540 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1541 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
| 1542 | skb = bt_skb_send_alloc(sk, count + hlen, |
| 1543 | msg->msg_flags & MSG_DONTWAIT, &err); |
| 1544 | if (!skb) |
Gustavo F. Padovan | 0175d62 | 2010-09-24 20:30:57 -0300 | [diff] [blame] | 1545 | return ERR_PTR(err); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1546 | |
| 1547 | /* Create L2CAP header */ |
| 1548 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1549 | lh->cid = cpu_to_le16(chan->dcid); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1550 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); |
| 1551 | put_unaligned_le16(control, skb_put(skb, 2)); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1552 | if (sdulen) |
| 1553 | put_unaligned_le16(sdulen, skb_put(skb, 2)); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1554 | |
| 1555 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); |
| 1556 | if (unlikely(err < 0)) { |
| 1557 | kfree_skb(skb); |
| 1558 | return ERR_PTR(err); |
| 1559 | } |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1560 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1561 | if (chan->fcs == L2CAP_FCS_CRC16) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1562 | put_unaligned_le16(0, skb_put(skb, 2)); |
| 1563 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1564 | bt_cb(skb)->retries = 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1565 | return skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1566 | } |
| 1567 | |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1568 | int l2cap_sar_segment_sdu(struct l2cap_chan *chan, struct msghdr *msg, size_t len) |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1569 | { |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1570 | struct sk_buff *skb; |
| 1571 | struct sk_buff_head sar_queue; |
| 1572 | u16 control; |
| 1573 | size_t size = 0; |
| 1574 | |
Gustavo F. Padovan | ff12fd6 | 2010-05-05 22:09:15 -0300 | [diff] [blame] | 1575 | skb_queue_head_init(&sar_queue); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1576 | control = L2CAP_SDU_START; |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1577 | skb = l2cap_create_iframe_pdu(chan, msg, chan->remote_mps, control, len); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1578 | if (IS_ERR(skb)) |
| 1579 | return PTR_ERR(skb); |
| 1580 | |
| 1581 | __skb_queue_tail(&sar_queue, skb); |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1582 | len -= chan->remote_mps; |
| 1583 | size += chan->remote_mps; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1584 | |
| 1585 | while (len > 0) { |
| 1586 | size_t buflen; |
| 1587 | |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1588 | if (len > chan->remote_mps) { |
Gustavo F. Padovan | 44651b8 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1589 | control = L2CAP_SDU_CONTINUE; |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1590 | buflen = chan->remote_mps; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1591 | } else { |
Gustavo F. Padovan | 44651b8 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1592 | control = L2CAP_SDU_END; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1593 | buflen = len; |
| 1594 | } |
| 1595 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1596 | skb = l2cap_create_iframe_pdu(chan, msg, buflen, control, 0); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1597 | if (IS_ERR(skb)) { |
| 1598 | skb_queue_purge(&sar_queue); |
| 1599 | return PTR_ERR(skb); |
| 1600 | } |
| 1601 | |
| 1602 | __skb_queue_tail(&sar_queue, skb); |
| 1603 | len -= buflen; |
| 1604 | size += buflen; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1605 | } |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1606 | skb_queue_splice_tail(&sar_queue, &chan->tx_q); |
| 1607 | if (chan->tx_send_head == NULL) |
| 1608 | chan->tx_send_head = sar_queue.next; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1609 | |
| 1610 | return size; |
| 1611 | } |
| 1612 | |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 1613 | int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len) |
| 1614 | { |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 1615 | struct sk_buff *skb; |
| 1616 | u16 control; |
| 1617 | int err; |
| 1618 | |
| 1619 | /* Connectionless channel */ |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 1620 | if (chan->chan_type == L2CAP_CHAN_CONN_LESS) { |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 1621 | skb = l2cap_create_connless_pdu(chan, msg, len); |
| 1622 | if (IS_ERR(skb)) |
| 1623 | return PTR_ERR(skb); |
| 1624 | |
| 1625 | l2cap_do_send(chan, skb); |
| 1626 | return len; |
| 1627 | } |
| 1628 | |
| 1629 | switch (chan->mode) { |
| 1630 | case L2CAP_MODE_BASIC: |
| 1631 | /* Check outgoing MTU */ |
| 1632 | if (len > chan->omtu) |
| 1633 | return -EMSGSIZE; |
| 1634 | |
| 1635 | /* Create a basic PDU */ |
| 1636 | skb = l2cap_create_basic_pdu(chan, msg, len); |
| 1637 | if (IS_ERR(skb)) |
| 1638 | return PTR_ERR(skb); |
| 1639 | |
| 1640 | l2cap_do_send(chan, skb); |
| 1641 | err = len; |
| 1642 | break; |
| 1643 | |
| 1644 | case L2CAP_MODE_ERTM: |
| 1645 | case L2CAP_MODE_STREAMING: |
| 1646 | /* Entire SDU fits into one PDU */ |
| 1647 | if (len <= chan->remote_mps) { |
| 1648 | control = L2CAP_SDU_UNSEGMENTED; |
| 1649 | skb = l2cap_create_iframe_pdu(chan, msg, len, control, |
| 1650 | 0); |
| 1651 | if (IS_ERR(skb)) |
| 1652 | return PTR_ERR(skb); |
| 1653 | |
| 1654 | __skb_queue_tail(&chan->tx_q, skb); |
| 1655 | |
| 1656 | if (chan->tx_send_head == NULL) |
| 1657 | chan->tx_send_head = skb; |
| 1658 | |
| 1659 | } else { |
| 1660 | /* Segment SDU into multiples PDUs */ |
| 1661 | err = l2cap_sar_segment_sdu(chan, msg, len); |
| 1662 | if (err < 0) |
| 1663 | return err; |
| 1664 | } |
| 1665 | |
| 1666 | if (chan->mode == L2CAP_MODE_STREAMING) { |
| 1667 | l2cap_streaming_send(chan); |
| 1668 | err = len; |
| 1669 | break; |
| 1670 | } |
| 1671 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1672 | if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state) && |
| 1673 | test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 1674 | err = len; |
| 1675 | break; |
| 1676 | } |
| 1677 | |
| 1678 | err = l2cap_ertm_send(chan); |
| 1679 | if (err >= 0) |
| 1680 | err = len; |
| 1681 | |
| 1682 | break; |
| 1683 | |
| 1684 | default: |
| 1685 | BT_DBG("bad state %1.1x", chan->mode); |
| 1686 | err = -EBADFD; |
| 1687 | } |
| 1688 | |
| 1689 | return err; |
| 1690 | } |
| 1691 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1692 | /* Copy frame to all raw sockets on that connection */ |
| 1693 | static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) |
| 1694 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1695 | struct sk_buff *nskb; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1696 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1697 | |
| 1698 | BT_DBG("conn %p", conn); |
| 1699 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1700 | read_lock(&conn->chan_lock); |
| 1701 | list_for_each_entry(chan, &conn->chan_l, list) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1702 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 1703 | if (chan->chan_type != L2CAP_CHAN_RAW) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1704 | continue; |
| 1705 | |
| 1706 | /* Don't send frame to the socket it came from */ |
| 1707 | if (skb->sk == sk) |
| 1708 | continue; |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 1709 | nskb = skb_clone(skb, GFP_ATOMIC); |
| 1710 | if (!nskb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1711 | continue; |
| 1712 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 1713 | if (chan->ops->recv(chan->data, nskb)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1714 | kfree_skb(nskb); |
| 1715 | } |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1716 | read_unlock(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1717 | } |
| 1718 | |
| 1719 | /* ---- L2CAP signalling commands ---- */ |
| 1720 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, |
| 1721 | u8 code, u8 ident, u16 dlen, void *data) |
| 1722 | { |
| 1723 | struct sk_buff *skb, **frag; |
| 1724 | struct l2cap_cmd_hdr *cmd; |
| 1725 | struct l2cap_hdr *lh; |
| 1726 | int len, count; |
| 1727 | |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 1728 | BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", |
| 1729 | conn, code, ident, dlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1730 | |
| 1731 | len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; |
| 1732 | count = min_t(unsigned int, conn->mtu, len); |
| 1733 | |
| 1734 | skb = bt_skb_alloc(count, GFP_ATOMIC); |
| 1735 | if (!skb) |
| 1736 | return NULL; |
| 1737 | |
| 1738 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1739 | lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 1740 | |
| 1741 | if (conn->hcon->type == LE_LINK) |
| 1742 | lh->cid = cpu_to_le16(L2CAP_CID_LE_SIGNALING); |
| 1743 | else |
| 1744 | lh->cid = cpu_to_le16(L2CAP_CID_SIGNALING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1745 | |
| 1746 | cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); |
| 1747 | cmd->code = code; |
| 1748 | cmd->ident = ident; |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1749 | cmd->len = cpu_to_le16(dlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1750 | |
| 1751 | if (dlen) { |
| 1752 | count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; |
| 1753 | memcpy(skb_put(skb, count), data, count); |
| 1754 | data += count; |
| 1755 | } |
| 1756 | |
| 1757 | len -= skb->len; |
| 1758 | |
| 1759 | /* Continuation fragments (no L2CAP header) */ |
| 1760 | frag = &skb_shinfo(skb)->frag_list; |
| 1761 | while (len) { |
| 1762 | count = min_t(unsigned int, conn->mtu, len); |
| 1763 | |
| 1764 | *frag = bt_skb_alloc(count, GFP_ATOMIC); |
| 1765 | if (!*frag) |
| 1766 | goto fail; |
| 1767 | |
| 1768 | memcpy(skb_put(*frag, count), data, count); |
| 1769 | |
| 1770 | len -= count; |
| 1771 | data += count; |
| 1772 | |
| 1773 | frag = &(*frag)->next; |
| 1774 | } |
| 1775 | |
| 1776 | return skb; |
| 1777 | |
| 1778 | fail: |
| 1779 | kfree_skb(skb); |
| 1780 | return NULL; |
| 1781 | } |
| 1782 | |
| 1783 | static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) |
| 1784 | { |
| 1785 | struct l2cap_conf_opt *opt = *ptr; |
| 1786 | int len; |
| 1787 | |
| 1788 | len = L2CAP_CONF_OPT_SIZE + opt->len; |
| 1789 | *ptr += len; |
| 1790 | |
| 1791 | *type = opt->type; |
| 1792 | *olen = opt->len; |
| 1793 | |
| 1794 | switch (opt->len) { |
| 1795 | case 1: |
| 1796 | *val = *((u8 *) opt->val); |
| 1797 | break; |
| 1798 | |
| 1799 | case 2: |
steven miao | bfaaeb3 | 2010-10-16 18:29:47 -0400 | [diff] [blame] | 1800 | *val = get_unaligned_le16(opt->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1801 | break; |
| 1802 | |
| 1803 | case 4: |
steven miao | bfaaeb3 | 2010-10-16 18:29:47 -0400 | [diff] [blame] | 1804 | *val = get_unaligned_le32(opt->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1805 | break; |
| 1806 | |
| 1807 | default: |
| 1808 | *val = (unsigned long) opt->val; |
| 1809 | break; |
| 1810 | } |
| 1811 | |
| 1812 | BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val); |
| 1813 | return len; |
| 1814 | } |
| 1815 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1816 | static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) |
| 1817 | { |
| 1818 | struct l2cap_conf_opt *opt = *ptr; |
| 1819 | |
| 1820 | BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val); |
| 1821 | |
| 1822 | opt->type = type; |
| 1823 | opt->len = len; |
| 1824 | |
| 1825 | switch (len) { |
| 1826 | case 1: |
| 1827 | *((u8 *) opt->val) = val; |
| 1828 | break; |
| 1829 | |
| 1830 | case 2: |
Gustavo F. Padovan | 4f8b691 | 2010-10-18 14:25:53 -0200 | [diff] [blame] | 1831 | put_unaligned_le16(val, opt->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1832 | break; |
| 1833 | |
| 1834 | case 4: |
Gustavo F. Padovan | 4f8b691 | 2010-10-18 14:25:53 -0200 | [diff] [blame] | 1835 | put_unaligned_le32(val, opt->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1836 | break; |
| 1837 | |
| 1838 | default: |
| 1839 | memcpy(opt->val, (void *) val, len); |
| 1840 | break; |
| 1841 | } |
| 1842 | |
| 1843 | *ptr += L2CAP_CONF_OPT_SIZE + len; |
| 1844 | } |
| 1845 | |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 1846 | static void l2cap_ack_timeout(unsigned long arg) |
| 1847 | { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1848 | struct l2cap_chan *chan = (void *) arg; |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 1849 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1850 | bh_lock_sock(chan->sk); |
| 1851 | l2cap_send_ack(chan); |
| 1852 | bh_unlock_sock(chan->sk); |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 1853 | } |
| 1854 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1855 | static inline void l2cap_ertm_init(struct l2cap_chan *chan) |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 1856 | { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1857 | struct sock *sk = chan->sk; |
| 1858 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1859 | chan->expected_ack_seq = 0; |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1860 | chan->unacked_frames = 0; |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1861 | chan->buffer_seq = 0; |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1862 | chan->num_acked = 0; |
| 1863 | chan->frames_sent = 0; |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 1864 | |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 1865 | setup_timer(&chan->retrans_timer, l2cap_retrans_timeout, |
| 1866 | (unsigned long) chan); |
| 1867 | setup_timer(&chan->monitor_timer, l2cap_monitor_timeout, |
| 1868 | (unsigned long) chan); |
| 1869 | setup_timer(&chan->ack_timer, l2cap_ack_timeout, (unsigned long) chan); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 1870 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 1871 | skb_queue_head_init(&chan->srej_q); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1872 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 1873 | INIT_LIST_HEAD(&chan->srej_l); |
| 1874 | |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 1875 | |
| 1876 | sk->sk_backlog_rcv = l2cap_ertm_data_rcv; |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 1877 | } |
| 1878 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1879 | static inline __u8 l2cap_select_mode(__u8 mode, __u16 remote_feat_mask) |
| 1880 | { |
| 1881 | switch (mode) { |
| 1882 | case L2CAP_MODE_STREAMING: |
| 1883 | case L2CAP_MODE_ERTM: |
| 1884 | if (l2cap_mode_supported(mode, remote_feat_mask)) |
| 1885 | return mode; |
| 1886 | /* fall through */ |
| 1887 | default: |
| 1888 | return L2CAP_MODE_BASIC; |
| 1889 | } |
| 1890 | } |
| 1891 | |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 1892 | static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1893 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1894 | struct l2cap_conf_req *req = data; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 1895 | struct l2cap_conf_rfc rfc = { .mode = chan->mode }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1896 | void *ptr = req->data; |
| 1897 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 1898 | BT_DBG("chan %p", chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1899 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 1900 | if (chan->num_conf_req || chan->num_conf_rsp) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1901 | goto done; |
| 1902 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 1903 | switch (chan->mode) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1904 | case L2CAP_MODE_STREAMING: |
| 1905 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 1906 | if (test_bit(CONF_STATE2_DEVICE, &chan->conf_state)) |
Gustavo F. Padovan | 85eb53c | 2010-06-03 18:43:28 -0300 | [diff] [blame] | 1907 | break; |
Gustavo F. Padovan | 85eb53c | 2010-06-03 18:43:28 -0300 | [diff] [blame] | 1908 | |
Gustavo F. Padovan | 2ba13ed | 2010-06-09 16:39:05 -0300 | [diff] [blame] | 1909 | /* fall through */ |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1910 | default: |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1911 | chan->mode = l2cap_select_mode(rfc.mode, chan->conn->feat_mask); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1912 | break; |
| 1913 | } |
| 1914 | |
| 1915 | done: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 1916 | if (chan->imtu != L2CAP_DEFAULT_MTU) |
| 1917 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu); |
Gustavo F. Padovan | 7990681 | 2011-01-24 16:01:43 -0200 | [diff] [blame] | 1918 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 1919 | switch (chan->mode) { |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 1920 | case L2CAP_MODE_BASIC: |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1921 | if (!(chan->conn->feat_mask & L2CAP_FEAT_ERTM) && |
| 1922 | !(chan->conn->feat_mask & L2CAP_FEAT_STREAMING)) |
Gustavo F. Padovan | 6340650 | 2010-08-03 23:49:29 -0300 | [diff] [blame] | 1923 | break; |
| 1924 | |
Gustavo F. Padovan | 6254775 | 2010-06-08 20:05:31 -0300 | [diff] [blame] | 1925 | rfc.mode = L2CAP_MODE_BASIC; |
| 1926 | rfc.txwin_size = 0; |
| 1927 | rfc.max_transmit = 0; |
| 1928 | rfc.retrans_timeout = 0; |
| 1929 | rfc.monitor_timeout = 0; |
| 1930 | rfc.max_pdu_size = 0; |
| 1931 | |
Gustavo F. Padovan | 6340650 | 2010-08-03 23:49:29 -0300 | [diff] [blame] | 1932 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
| 1933 | (unsigned long) &rfc); |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 1934 | break; |
| 1935 | |
| 1936 | case L2CAP_MODE_ERTM: |
| 1937 | rfc.mode = L2CAP_MODE_ERTM; |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1938 | rfc.txwin_size = chan->tx_win; |
| 1939 | rfc.max_transmit = chan->max_tx; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1940 | rfc.retrans_timeout = 0; |
| 1941 | rfc.monitor_timeout = 0; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1942 | rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE); |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1943 | if (L2CAP_DEFAULT_MAX_PDU_SIZE > chan->conn->mtu - 10) |
| 1944 | rfc.max_pdu_size = cpu_to_le16(chan->conn->mtu - 10); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1945 | |
Gustavo F. Padovan | 6340650 | 2010-08-03 23:49:29 -0300 | [diff] [blame] | 1946 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
| 1947 | (unsigned long) &rfc); |
| 1948 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1949 | if (!(chan->conn->feat_mask & L2CAP_FEAT_FCS)) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1950 | break; |
| 1951 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1952 | if (chan->fcs == L2CAP_FCS_NONE || |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 1953 | test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1954 | chan->fcs = L2CAP_FCS_NONE; |
| 1955 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, chan->fcs); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1956 | } |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1957 | break; |
| 1958 | |
| 1959 | case L2CAP_MODE_STREAMING: |
| 1960 | rfc.mode = L2CAP_MODE_STREAMING; |
| 1961 | rfc.txwin_size = 0; |
| 1962 | rfc.max_transmit = 0; |
| 1963 | rfc.retrans_timeout = 0; |
| 1964 | rfc.monitor_timeout = 0; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1965 | rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE); |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1966 | if (L2CAP_DEFAULT_MAX_PDU_SIZE > chan->conn->mtu - 10) |
| 1967 | rfc.max_pdu_size = cpu_to_le16(chan->conn->mtu - 10); |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 1968 | |
Gustavo F. Padovan | 6340650 | 2010-08-03 23:49:29 -0300 | [diff] [blame] | 1969 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
| 1970 | (unsigned long) &rfc); |
| 1971 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1972 | if (!(chan->conn->feat_mask & L2CAP_FEAT_FCS)) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1973 | break; |
| 1974 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1975 | if (chan->fcs == L2CAP_FCS_NONE || |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 1976 | test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1977 | chan->fcs = L2CAP_FCS_NONE; |
| 1978 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, chan->fcs); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1979 | } |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 1980 | break; |
| 1981 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1982 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1983 | req->dcid = cpu_to_le16(chan->dcid); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1984 | req->flags = cpu_to_le16(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1985 | |
| 1986 | return ptr - data; |
| 1987 | } |
| 1988 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 1989 | static int l2cap_parse_conf_req(struct l2cap_chan *chan, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1990 | { |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1991 | struct l2cap_conf_rsp *rsp = data; |
| 1992 | void *ptr = rsp->data; |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 1993 | void *req = chan->conf_req; |
| 1994 | int len = chan->conf_len; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1995 | int type, hint, olen; |
| 1996 | unsigned long val; |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 1997 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 1998 | u16 mtu = L2CAP_DEFAULT_MTU; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1999 | u16 result = L2CAP_CONF_SUCCESS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2000 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2001 | BT_DBG("chan %p", chan); |
Marcel Holtmann | 820ae1b | 2006-11-18 22:15:00 +0100 | [diff] [blame] | 2002 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2003 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 2004 | len -= l2cap_get_conf_opt(&req, &type, &olen, &val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2005 | |
Gustavo F. Padovan | 589d274 | 2009-04-20 01:31:07 -0300 | [diff] [blame] | 2006 | hint = type & L2CAP_CONF_HINT; |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 2007 | type &= L2CAP_CONF_MASK; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2008 | |
| 2009 | switch (type) { |
| 2010 | case L2CAP_CONF_MTU: |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 2011 | mtu = val; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2012 | break; |
| 2013 | |
| 2014 | case L2CAP_CONF_FLUSH_TO: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2015 | chan->flush_to = val; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2016 | break; |
| 2017 | |
| 2018 | case L2CAP_CONF_QOS: |
| 2019 | break; |
| 2020 | |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2021 | case L2CAP_CONF_RFC: |
| 2022 | if (olen == sizeof(rfc)) |
| 2023 | memcpy(&rfc, (void *) val, olen); |
| 2024 | break; |
| 2025 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2026 | case L2CAP_CONF_FCS: |
| 2027 | if (val == L2CAP_FCS_NONE) |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2028 | set_bit(CONF_NO_FCS_RECV, &chan->conf_state); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2029 | |
| 2030 | break; |
| 2031 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2032 | default: |
| 2033 | if (hint) |
| 2034 | break; |
| 2035 | |
| 2036 | result = L2CAP_CONF_UNKNOWN; |
| 2037 | *((u8 *) ptr++) = type; |
| 2038 | break; |
| 2039 | } |
| 2040 | } |
| 2041 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2042 | if (chan->num_conf_rsp || chan->num_conf_req > 1) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2043 | goto done; |
| 2044 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2045 | switch (chan->mode) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2046 | case L2CAP_MODE_STREAMING: |
| 2047 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2048 | if (!test_bit(CONF_STATE2_DEVICE, &chan->conf_state)) { |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2049 | chan->mode = l2cap_select_mode(rfc.mode, |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2050 | chan->conn->feat_mask); |
Gustavo F. Padovan | 85eb53c | 2010-06-03 18:43:28 -0300 | [diff] [blame] | 2051 | break; |
| 2052 | } |
| 2053 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2054 | if (chan->mode != rfc.mode) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2055 | return -ECONNREFUSED; |
Gustavo F. Padovan | 742e519 | 2010-06-08 19:09:48 -0300 | [diff] [blame] | 2056 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2057 | break; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2058 | } |
| 2059 | |
| 2060 | done: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2061 | if (chan->mode != rfc.mode) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2062 | result = L2CAP_CONF_UNACCEPT; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2063 | rfc.mode = chan->mode; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2064 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2065 | if (chan->num_conf_rsp == 1) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2066 | return -ECONNREFUSED; |
| 2067 | |
| 2068 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2069 | sizeof(rfc), (unsigned long) &rfc); |
| 2070 | } |
| 2071 | |
| 2072 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2073 | if (result == L2CAP_CONF_SUCCESS) { |
| 2074 | /* Configure output options and let the other side know |
| 2075 | * which ones we don't like. */ |
| 2076 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2077 | if (mtu < L2CAP_DEFAULT_MIN_MTU) |
| 2078 | result = L2CAP_CONF_UNACCEPT; |
| 2079 | else { |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2080 | chan->omtu = mtu; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2081 | set_bit(CONF_MTU_DONE, &chan->conf_state); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2082 | } |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2083 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->omtu); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2084 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2085 | switch (rfc.mode) { |
| 2086 | case L2CAP_MODE_BASIC: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2087 | chan->fcs = L2CAP_FCS_NONE; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2088 | set_bit(CONF_MODE_DONE, &chan->conf_state); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2089 | break; |
| 2090 | |
| 2091 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 2092 | chan->remote_tx_win = rfc.txwin_size; |
| 2093 | chan->remote_max_tx = rfc.max_transmit; |
Mat Martineau | 86b1b26 | 2010-08-05 15:54:22 -0700 | [diff] [blame] | 2094 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2095 | if (le16_to_cpu(rfc.max_pdu_size) > chan->conn->mtu - 10) |
| 2096 | rfc.max_pdu_size = cpu_to_le16(chan->conn->mtu - 10); |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2097 | |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 2098 | chan->remote_mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2099 | |
Gustavo F. Padovan | 10467e9 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2100 | rfc.retrans_timeout = |
| 2101 | le16_to_cpu(L2CAP_DEFAULT_RETRANS_TO); |
| 2102 | rfc.monitor_timeout = |
| 2103 | le16_to_cpu(L2CAP_DEFAULT_MONITOR_TO); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2104 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2105 | set_bit(CONF_MODE_DONE, &chan->conf_state); |
Gustavo F. Padovan | 68ae663 | 2009-10-17 21:41:01 -0300 | [diff] [blame] | 2106 | |
| 2107 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2108 | sizeof(rfc), (unsigned long) &rfc); |
| 2109 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2110 | break; |
| 2111 | |
| 2112 | case L2CAP_MODE_STREAMING: |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2113 | if (le16_to_cpu(rfc.max_pdu_size) > chan->conn->mtu - 10) |
| 2114 | rfc.max_pdu_size = cpu_to_le16(chan->conn->mtu - 10); |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2115 | |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 2116 | chan->remote_mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2117 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2118 | set_bit(CONF_MODE_DONE, &chan->conf_state); |
Gustavo F. Padovan | 68ae663 | 2009-10-17 21:41:01 -0300 | [diff] [blame] | 2119 | |
| 2120 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2121 | sizeof(rfc), (unsigned long) &rfc); |
| 2122 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2123 | break; |
| 2124 | |
| 2125 | default: |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2126 | result = L2CAP_CONF_UNACCEPT; |
| 2127 | |
| 2128 | memset(&rfc, 0, sizeof(rfc)); |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2129 | rfc.mode = chan->mode; |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2130 | } |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2131 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2132 | if (result == L2CAP_CONF_SUCCESS) |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2133 | set_bit(CONF_OUTPUT_DONE, &chan->conf_state); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2134 | } |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2135 | rsp->scid = cpu_to_le16(chan->dcid); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2136 | rsp->result = cpu_to_le16(result); |
| 2137 | rsp->flags = cpu_to_le16(0x0000); |
| 2138 | |
| 2139 | return ptr - data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2140 | } |
| 2141 | |
Gustavo F. Padovan | b445003 | 2011-04-12 18:15:09 -0300 | [diff] [blame] | 2142 | 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] | 2143 | { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2144 | struct l2cap_conf_req *req = data; |
| 2145 | void *ptr = req->data; |
| 2146 | int type, olen; |
| 2147 | unsigned long val; |
| 2148 | struct l2cap_conf_rfc rfc; |
| 2149 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2150 | 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] | 2151 | |
| 2152 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 2153 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); |
| 2154 | |
| 2155 | switch (type) { |
| 2156 | case L2CAP_CONF_MTU: |
| 2157 | if (val < L2CAP_DEFAULT_MIN_MTU) { |
| 2158 | *result = L2CAP_CONF_UNACCEPT; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2159 | chan->imtu = L2CAP_DEFAULT_MIN_MTU; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2160 | } else |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2161 | chan->imtu = val; |
| 2162 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2163 | break; |
| 2164 | |
| 2165 | case L2CAP_CONF_FLUSH_TO: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2166 | chan->flush_to = val; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2167 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2168 | 2, chan->flush_to); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2169 | break; |
| 2170 | |
| 2171 | case L2CAP_CONF_RFC: |
| 2172 | if (olen == sizeof(rfc)) |
| 2173 | memcpy(&rfc, (void *)val, olen); |
| 2174 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2175 | if (test_bit(CONF_STATE2_DEVICE, &chan->conf_state) && |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2176 | rfc.mode != chan->mode) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2177 | return -ECONNREFUSED; |
| 2178 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2179 | chan->fcs = 0; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2180 | |
| 2181 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2182 | sizeof(rfc), (unsigned long) &rfc); |
| 2183 | break; |
| 2184 | } |
| 2185 | } |
| 2186 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2187 | if (chan->mode == L2CAP_MODE_BASIC && chan->mode != rfc.mode) |
Gustavo F. Padovan | 6c2ea7a | 2010-06-08 20:08:49 -0300 | [diff] [blame] | 2188 | return -ECONNREFUSED; |
| 2189 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2190 | chan->mode = rfc.mode; |
Gustavo F. Padovan | 6c2ea7a | 2010-06-08 20:08:49 -0300 | [diff] [blame] | 2191 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2192 | if (*result == L2CAP_CONF_SUCCESS) { |
| 2193 | switch (rfc.mode) { |
| 2194 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2195 | chan->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); |
| 2196 | chan->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); |
| 2197 | chan->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2198 | break; |
| 2199 | case L2CAP_MODE_STREAMING: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2200 | chan->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2201 | } |
| 2202 | } |
| 2203 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2204 | req->dcid = cpu_to_le16(chan->dcid); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2205 | req->flags = cpu_to_le16(0x0000); |
| 2206 | |
| 2207 | return ptr - data; |
| 2208 | } |
| 2209 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2210 | 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] | 2211 | { |
| 2212 | struct l2cap_conf_rsp *rsp = data; |
| 2213 | void *ptr = rsp->data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2214 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2215 | BT_DBG("chan %p", chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2216 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2217 | rsp->scid = cpu_to_le16(chan->dcid); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2218 | rsp->result = cpu_to_le16(result); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2219 | rsp->flags = cpu_to_le16(flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2220 | |
| 2221 | return ptr - data; |
| 2222 | } |
| 2223 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2224 | void __l2cap_connect_rsp_defer(struct l2cap_chan *chan) |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2225 | { |
| 2226 | struct l2cap_conn_rsp rsp; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2227 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2228 | u8 buf[128]; |
| 2229 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2230 | rsp.scid = cpu_to_le16(chan->dcid); |
| 2231 | rsp.dcid = cpu_to_le16(chan->scid); |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2232 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); |
| 2233 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 2234 | l2cap_send_cmd(conn, chan->ident, |
| 2235 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
| 2236 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2237 | if (test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2238 | return; |
| 2239 | |
Gustavo F. Padovan | 710f9b0 | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2240 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
| 2241 | l2cap_build_conf_req(chan, buf), buf); |
| 2242 | chan->num_conf_req++; |
| 2243 | } |
| 2244 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2245 | 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] | 2246 | { |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2247 | int type, olen; |
| 2248 | unsigned long val; |
| 2249 | struct l2cap_conf_rfc rfc; |
| 2250 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2251 | BT_DBG("chan %p, rsp %p, len %d", chan, rsp, len); |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2252 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2253 | if ((chan->mode != L2CAP_MODE_ERTM) && (chan->mode != L2CAP_MODE_STREAMING)) |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2254 | return; |
| 2255 | |
| 2256 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 2257 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); |
| 2258 | |
| 2259 | switch (type) { |
| 2260 | case L2CAP_CONF_RFC: |
| 2261 | if (olen == sizeof(rfc)) |
| 2262 | memcpy(&rfc, (void *)val, olen); |
| 2263 | goto done; |
| 2264 | } |
| 2265 | } |
| 2266 | |
| 2267 | done: |
| 2268 | switch (rfc.mode) { |
| 2269 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2270 | chan->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); |
| 2271 | chan->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); |
| 2272 | chan->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2273 | break; |
| 2274 | case L2CAP_MODE_STREAMING: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2275 | chan->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2276 | } |
| 2277 | } |
| 2278 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2279 | static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2280 | { |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 2281 | struct l2cap_cmd_rej_unk *rej = (struct l2cap_cmd_rej_unk *) data; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2282 | |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 2283 | if (rej->reason != L2CAP_REJ_NOT_UNDERSTOOD) |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2284 | return 0; |
| 2285 | |
| 2286 | if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) && |
| 2287 | cmd->ident == conn->info_ident) { |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2288 | del_timer(&conn->info_timer); |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2289 | |
| 2290 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 2291 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2292 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2293 | l2cap_conn_start(conn); |
| 2294 | } |
| 2295 | |
| 2296 | return 0; |
| 2297 | } |
| 2298 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2299 | static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2300 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2301 | struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; |
| 2302 | struct l2cap_conn_rsp rsp; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 2303 | struct l2cap_chan *chan = NULL, *pchan; |
Nathan Holstein | d793fe8 | 2010-10-15 11:54:02 -0400 | [diff] [blame] | 2304 | struct sock *parent, *sk = NULL; |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2305 | int result, status = L2CAP_CS_NO_INFO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2306 | |
| 2307 | u16 dcid = 0, scid = __le16_to_cpu(req->scid); |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2308 | __le16 psm = req->psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2309 | |
| 2310 | BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid); |
| 2311 | |
| 2312 | /* Check if we have socket listening on psm */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 2313 | pchan = l2cap_global_chan_by_psm(BT_LISTEN, psm, conn->src); |
| 2314 | if (!pchan) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2315 | result = L2CAP_CR_BAD_PSM; |
| 2316 | goto sendresp; |
| 2317 | } |
| 2318 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 2319 | parent = pchan->sk; |
| 2320 | |
Gustavo F. Padovan | e0f0cb5 | 2010-11-01 18:43:53 +0000 | [diff] [blame] | 2321 | bh_lock_sock(parent); |
| 2322 | |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2323 | /* Check if the ACL is secure enough (if not SDP) */ |
| 2324 | if (psm != cpu_to_le16(0x0001) && |
| 2325 | !hci_conn_check_link_mode(conn->hcon)) { |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 2326 | conn->disc_reason = 0x05; |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2327 | result = L2CAP_CR_SEC_BLOCK; |
| 2328 | goto response; |
| 2329 | } |
| 2330 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2331 | result = L2CAP_CR_NO_MEM; |
| 2332 | |
| 2333 | /* Check for backlog size */ |
| 2334 | if (sk_acceptq_is_full(parent)) { |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 2335 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2336 | goto response; |
| 2337 | } |
| 2338 | |
Gustavo F. Padovan | 80808e4 | 2011-05-16 17:24:37 -0300 | [diff] [blame] | 2339 | chan = pchan->ops->new_connection(pchan->data); |
| 2340 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2341 | goto response; |
| 2342 | |
Gustavo F. Padovan | 80808e4 | 2011-05-16 17:24:37 -0300 | [diff] [blame] | 2343 | sk = chan->sk; |
| 2344 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2345 | write_lock_bh(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2346 | |
| 2347 | /* Check if we already have channel with that dcid */ |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2348 | if (__l2cap_get_chan_by_dcid(conn, scid)) { |
| 2349 | write_unlock_bh(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2350 | sock_set_flag(sk, SOCK_ZAPPED); |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 2351 | chan->ops->close(chan->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2352 | goto response; |
| 2353 | } |
| 2354 | |
| 2355 | hci_conn_hold(conn->hcon); |
| 2356 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2357 | bacpy(&bt_sk(sk)->src, conn->src); |
| 2358 | bacpy(&bt_sk(sk)->dst, conn->dst); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2359 | chan->psm = psm; |
| 2360 | chan->dcid = scid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2361 | |
Gustavo F. Padovan | d101024 | 2011-03-25 00:39:48 -0300 | [diff] [blame] | 2362 | bt_accept_enqueue(parent, sk); |
| 2363 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2364 | __l2cap_chan_add(conn, chan); |
| 2365 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2366 | dcid = chan->scid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2367 | |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 2368 | __set_chan_timer(chan, sk->sk_sndtimeo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2369 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 2370 | chan->ident = cmd->ident; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2371 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2372 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 2373 | if (l2cap_check_security(chan)) { |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 2374 | if (bt_sk(sk)->defer_setup) { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2375 | l2cap_state_change(chan, BT_CONNECT2); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 2376 | result = L2CAP_CR_PEND; |
| 2377 | status = L2CAP_CS_AUTHOR_PEND; |
| 2378 | parent->sk_data_ready(parent, 0); |
| 2379 | } else { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2380 | l2cap_state_change(chan, BT_CONFIG); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 2381 | result = L2CAP_CR_SUCCESS; |
| 2382 | status = L2CAP_CS_NO_INFO; |
| 2383 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2384 | } else { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2385 | l2cap_state_change(chan, BT_CONNECT2); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2386 | result = L2CAP_CR_PEND; |
| 2387 | status = L2CAP_CS_AUTHEN_PEND; |
| 2388 | } |
| 2389 | } else { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2390 | l2cap_state_change(chan, BT_CONNECT2); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2391 | result = L2CAP_CR_PEND; |
| 2392 | status = L2CAP_CS_NO_INFO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2393 | } |
| 2394 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2395 | write_unlock_bh(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2396 | |
| 2397 | response: |
| 2398 | bh_unlock_sock(parent); |
| 2399 | |
| 2400 | sendresp: |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2401 | rsp.scid = cpu_to_le16(scid); |
| 2402 | rsp.dcid = cpu_to_le16(dcid); |
| 2403 | rsp.result = cpu_to_le16(result); |
| 2404 | rsp.status = cpu_to_le16(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2405 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2406 | |
| 2407 | if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) { |
| 2408 | struct l2cap_info_req info; |
| 2409 | info.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 2410 | |
| 2411 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; |
| 2412 | conn->info_ident = l2cap_get_ident(conn); |
| 2413 | |
| 2414 | mod_timer(&conn->info_timer, jiffies + |
| 2415 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); |
| 2416 | |
| 2417 | l2cap_send_cmd(conn, conn->info_ident, |
| 2418 | L2CAP_INFO_REQ, sizeof(info), &info); |
| 2419 | } |
| 2420 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2421 | if (chan && !test_bit(CONF_REQ_SENT, &chan->conf_state) && |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 2422 | result == L2CAP_CR_SUCCESS) { |
| 2423 | u8 buf[128]; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2424 | set_bit(CONF_REQ_SENT, &chan->conf_state); |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 2425 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2426 | l2cap_build_conf_req(chan, buf), buf); |
| 2427 | chan->num_conf_req++; |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 2428 | } |
| 2429 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2430 | return 0; |
| 2431 | } |
| 2432 | |
| 2433 | static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2434 | { |
| 2435 | struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; |
| 2436 | u16 scid, dcid, result, status; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2437 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2438 | struct sock *sk; |
| 2439 | u8 req[128]; |
| 2440 | |
| 2441 | scid = __le16_to_cpu(rsp->scid); |
| 2442 | dcid = __le16_to_cpu(rsp->dcid); |
| 2443 | result = __le16_to_cpu(rsp->result); |
| 2444 | status = __le16_to_cpu(rsp->status); |
| 2445 | |
| 2446 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid, scid, result, status); |
| 2447 | |
| 2448 | if (scid) { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2449 | chan = l2cap_get_chan_by_scid(conn, scid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2450 | if (!chan) |
João Paulo Rechi Vita | 57d3b22 | 2010-06-22 13:56:26 -0300 | [diff] [blame] | 2451 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2452 | } else { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2453 | chan = l2cap_get_chan_by_ident(conn, cmd->ident); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2454 | if (!chan) |
João Paulo Rechi Vita | 57d3b22 | 2010-06-22 13:56:26 -0300 | [diff] [blame] | 2455 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2456 | } |
| 2457 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2458 | sk = chan->sk; |
| 2459 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2460 | switch (result) { |
| 2461 | case L2CAP_CR_SUCCESS: |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2462 | l2cap_state_change(chan, BT_CONFIG); |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 2463 | chan->ident = 0; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2464 | chan->dcid = dcid; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2465 | clear_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Marcel Holtmann | 6a8d301 | 2009-02-06 23:56:36 +0100 | [diff] [blame] | 2466 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2467 | if (test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 2468 | break; |
| 2469 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2470 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2471 | l2cap_build_conf_req(chan, req), req); |
| 2472 | chan->num_conf_req++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2473 | break; |
| 2474 | |
| 2475 | case L2CAP_CR_PEND: |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2476 | set_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2477 | break; |
| 2478 | |
| 2479 | default: |
Andrei Emeltchenko | a49184c | 2010-11-03 12:32:44 +0200 | [diff] [blame] | 2480 | /* don't delete l2cap channel if sk is owned by user */ |
| 2481 | if (sock_owned_by_user(sk)) { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2482 | l2cap_state_change(chan, BT_DISCONN); |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 2483 | __clear_chan_timer(chan); |
| 2484 | __set_chan_timer(chan, HZ / 5); |
Andrei Emeltchenko | a49184c | 2010-11-03 12:32:44 +0200 | [diff] [blame] | 2485 | break; |
| 2486 | } |
| 2487 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2488 | l2cap_chan_del(chan, ECONNREFUSED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2489 | break; |
| 2490 | } |
| 2491 | |
| 2492 | bh_unlock_sock(sk); |
| 2493 | return 0; |
| 2494 | } |
| 2495 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2496 | static inline void set_default_fcs(struct l2cap_chan *chan) |
Mat Martineau | 8c462b6 | 2010-08-24 15:35:42 -0700 | [diff] [blame] | 2497 | { |
| 2498 | /* FCS is enabled only in ERTM or streaming mode, if one or both |
| 2499 | * sides request it. |
| 2500 | */ |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2501 | if (chan->mode != L2CAP_MODE_ERTM && chan->mode != L2CAP_MODE_STREAMING) |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2502 | chan->fcs = L2CAP_FCS_NONE; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2503 | else if (!test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2504 | chan->fcs = L2CAP_FCS_CRC16; |
Mat Martineau | 8c462b6 | 2010-08-24 15:35:42 -0700 | [diff] [blame] | 2505 | } |
| 2506 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 2507 | 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] | 2508 | { |
| 2509 | struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; |
| 2510 | u16 dcid, flags; |
| 2511 | u8 rsp[64]; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2512 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2513 | struct sock *sk; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2514 | int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2515 | |
| 2516 | dcid = __le16_to_cpu(req->dcid); |
| 2517 | flags = __le16_to_cpu(req->flags); |
| 2518 | |
| 2519 | BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); |
| 2520 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2521 | chan = l2cap_get_chan_by_scid(conn, dcid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2522 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2523 | return -ENOENT; |
| 2524 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2525 | sk = chan->sk; |
| 2526 | |
David S. Miller | 033b114 | 2011-07-21 13:38:42 -0700 | [diff] [blame] | 2527 | if (chan->state != BT_CONFIG && chan->state != BT_CONNECT2) { |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 2528 | struct l2cap_cmd_rej_cid rej; |
Gustavo F. Padovan | df6bd74 | 2010-06-14 02:26:15 -0300 | [diff] [blame] | 2529 | |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 2530 | rej.reason = cpu_to_le16(L2CAP_REJ_INVALID_CID); |
| 2531 | rej.scid = cpu_to_le16(chan->scid); |
| 2532 | rej.dcid = cpu_to_le16(chan->dcid); |
| 2533 | |
Gustavo F. Padovan | df6bd74 | 2010-06-14 02:26:15 -0300 | [diff] [blame] | 2534 | l2cap_send_cmd(conn, cmd->ident, L2CAP_COMMAND_REJ, |
| 2535 | sizeof(rej), &rej); |
Marcel Holtmann | 354f60a | 2006-11-18 22:15:20 +0100 | [diff] [blame] | 2536 | goto unlock; |
Gustavo F. Padovan | df6bd74 | 2010-06-14 02:26:15 -0300 | [diff] [blame] | 2537 | } |
Marcel Holtmann | 354f60a | 2006-11-18 22:15:20 +0100 | [diff] [blame] | 2538 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2539 | /* Reject if config buffer is too small. */ |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 2540 | len = cmd_len - sizeof(*req); |
Dan Rosenberg | 7ac2881 | 2011-06-24 08:38:05 -0400 | [diff] [blame] | 2541 | if (len < 0 || chan->conf_len + len > sizeof(chan->conf_req)) { |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2542 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2543 | l2cap_build_conf_rsp(chan, rsp, |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2544 | L2CAP_CONF_REJECT, flags), rsp); |
| 2545 | goto unlock; |
| 2546 | } |
| 2547 | |
| 2548 | /* Store config. */ |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2549 | memcpy(chan->conf_req + chan->conf_len, req->data, len); |
| 2550 | chan->conf_len += len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2551 | |
| 2552 | if (flags & 0x0001) { |
| 2553 | /* Incomplete config. Send empty response. */ |
| 2554 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2555 | l2cap_build_conf_rsp(chan, rsp, |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2556 | L2CAP_CONF_SUCCESS, 0x0001), rsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2557 | goto unlock; |
| 2558 | } |
| 2559 | |
| 2560 | /* Complete config. */ |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2561 | len = l2cap_parse_conf_req(chan, rsp); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2562 | if (len < 0) { |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 2563 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2564 | goto unlock; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2565 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2566 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2567 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2568 | chan->num_conf_rsp++; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2569 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2570 | /* Reset config buffer. */ |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2571 | chan->conf_len = 0; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2572 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2573 | if (!test_bit(CONF_OUTPUT_DONE, &chan->conf_state)) |
Marcel Holtmann | 876d948 | 2007-10-20 13:35:42 +0200 | [diff] [blame] | 2574 | goto unlock; |
| 2575 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2576 | if (test_bit(CONF_INPUT_DONE, &chan->conf_state)) { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2577 | set_default_fcs(chan); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2578 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2579 | l2cap_state_change(chan, BT_CONNECTED); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2580 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 2581 | chan->next_tx_seq = 0; |
| 2582 | chan->expected_tx_seq = 0; |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 2583 | skb_queue_head_init(&chan->tx_q); |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2584 | if (chan->mode == L2CAP_MODE_ERTM) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 2585 | l2cap_ertm_init(chan); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2586 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2587 | l2cap_chan_ready(sk); |
Marcel Holtmann | 876d948 | 2007-10-20 13:35:42 +0200 | [diff] [blame] | 2588 | goto unlock; |
| 2589 | } |
| 2590 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2591 | if (!test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2592 | u8 buf[64]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2593 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2594 | l2cap_build_conf_req(chan, buf), buf); |
| 2595 | chan->num_conf_req++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2596 | } |
| 2597 | |
| 2598 | unlock: |
| 2599 | bh_unlock_sock(sk); |
| 2600 | return 0; |
| 2601 | } |
| 2602 | |
| 2603 | static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2604 | { |
| 2605 | struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; |
| 2606 | u16 scid, flags, result; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2607 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2608 | struct sock *sk; |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2609 | int len = cmd->len - sizeof(*rsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2610 | |
| 2611 | scid = __le16_to_cpu(rsp->scid); |
| 2612 | flags = __le16_to_cpu(rsp->flags); |
| 2613 | result = __le16_to_cpu(rsp->result); |
| 2614 | |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2615 | BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x", |
| 2616 | scid, flags, result); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2617 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2618 | chan = l2cap_get_chan_by_scid(conn, scid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2619 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2620 | return 0; |
| 2621 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2622 | sk = chan->sk; |
| 2623 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2624 | switch (result) { |
| 2625 | case L2CAP_CONF_SUCCESS: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2626 | l2cap_conf_rfc_get(chan, rsp->data, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2627 | break; |
| 2628 | |
| 2629 | case L2CAP_CONF_UNACCEPT: |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2630 | if (chan->num_conf_rsp <= L2CAP_CONF_MAX_CONF_RSP) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2631 | char req[64]; |
| 2632 | |
Andrei Emeltchenko | c2c77ec | 2010-03-19 10:26:28 +0200 | [diff] [blame] | 2633 | if (len > sizeof(req) - sizeof(struct l2cap_conf_req)) { |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 2634 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
Andrei Emeltchenko | c2c77ec | 2010-03-19 10:26:28 +0200 | [diff] [blame] | 2635 | goto done; |
| 2636 | } |
| 2637 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2638 | /* throw out any old stored conf requests */ |
| 2639 | result = L2CAP_CONF_SUCCESS; |
Gustavo F. Padovan | b445003 | 2011-04-12 18:15:09 -0300 | [diff] [blame] | 2640 | len = l2cap_parse_conf_rsp(chan, rsp->data, len, |
| 2641 | req, &result); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2642 | if (len < 0) { |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 2643 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2644 | goto done; |
| 2645 | } |
| 2646 | |
| 2647 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
| 2648 | L2CAP_CONF_REQ, len, req); |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2649 | chan->num_conf_req++; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2650 | if (result != L2CAP_CONF_SUCCESS) |
| 2651 | goto done; |
| 2652 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2653 | } |
| 2654 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 2655 | default: |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 2656 | sk->sk_err = ECONNRESET; |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 2657 | __set_chan_timer(chan, HZ * 5); |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 2658 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2659 | goto done; |
| 2660 | } |
| 2661 | |
| 2662 | if (flags & 0x01) |
| 2663 | goto done; |
| 2664 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2665 | set_bit(CONF_INPUT_DONE, &chan->conf_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2666 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2667 | if (test_bit(CONF_OUTPUT_DONE, &chan->conf_state)) { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2668 | set_default_fcs(chan); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2669 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2670 | l2cap_state_change(chan, BT_CONNECTED); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 2671 | chan->next_tx_seq = 0; |
| 2672 | chan->expected_tx_seq = 0; |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 2673 | skb_queue_head_init(&chan->tx_q); |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2674 | if (chan->mode == L2CAP_MODE_ERTM) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 2675 | l2cap_ertm_init(chan); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2676 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2677 | l2cap_chan_ready(sk); |
| 2678 | } |
| 2679 | |
| 2680 | done: |
| 2681 | bh_unlock_sock(sk); |
| 2682 | return 0; |
| 2683 | } |
| 2684 | |
| 2685 | static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2686 | { |
| 2687 | struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; |
| 2688 | struct l2cap_disconn_rsp rsp; |
| 2689 | u16 dcid, scid; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2690 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2691 | struct sock *sk; |
| 2692 | |
| 2693 | scid = __le16_to_cpu(req->scid); |
| 2694 | dcid = __le16_to_cpu(req->dcid); |
| 2695 | |
| 2696 | BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); |
| 2697 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2698 | chan = l2cap_get_chan_by_scid(conn, dcid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2699 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2700 | return 0; |
| 2701 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2702 | sk = chan->sk; |
| 2703 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2704 | rsp.dcid = cpu_to_le16(chan->scid); |
| 2705 | rsp.scid = cpu_to_le16(chan->dcid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2706 | l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); |
| 2707 | |
| 2708 | sk->sk_shutdown = SHUTDOWN_MASK; |
| 2709 | |
Andrei Emeltchenko | a49184c | 2010-11-03 12:32:44 +0200 | [diff] [blame] | 2710 | /* don't delete l2cap channel if sk is owned by user */ |
| 2711 | if (sock_owned_by_user(sk)) { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2712 | l2cap_state_change(chan, BT_DISCONN); |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 2713 | __clear_chan_timer(chan); |
| 2714 | __set_chan_timer(chan, HZ / 5); |
Andrei Emeltchenko | a49184c | 2010-11-03 12:32:44 +0200 | [diff] [blame] | 2715 | bh_unlock_sock(sk); |
| 2716 | return 0; |
| 2717 | } |
| 2718 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2719 | l2cap_chan_del(chan, ECONNRESET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2720 | bh_unlock_sock(sk); |
| 2721 | |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 2722 | chan->ops->close(chan->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2723 | return 0; |
| 2724 | } |
| 2725 | |
| 2726 | static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2727 | { |
| 2728 | struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; |
| 2729 | u16 dcid, scid; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2730 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2731 | struct sock *sk; |
| 2732 | |
| 2733 | scid = __le16_to_cpu(rsp->scid); |
| 2734 | dcid = __le16_to_cpu(rsp->dcid); |
| 2735 | |
| 2736 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); |
| 2737 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2738 | chan = l2cap_get_chan_by_scid(conn, scid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2739 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2740 | return 0; |
| 2741 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2742 | sk = chan->sk; |
| 2743 | |
Andrei Emeltchenko | a49184c | 2010-11-03 12:32:44 +0200 | [diff] [blame] | 2744 | /* don't delete l2cap channel if sk is owned by user */ |
| 2745 | if (sock_owned_by_user(sk)) { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2746 | l2cap_state_change(chan,BT_DISCONN); |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 2747 | __clear_chan_timer(chan); |
| 2748 | __set_chan_timer(chan, HZ / 5); |
Andrei Emeltchenko | a49184c | 2010-11-03 12:32:44 +0200 | [diff] [blame] | 2749 | bh_unlock_sock(sk); |
| 2750 | return 0; |
| 2751 | } |
| 2752 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2753 | l2cap_chan_del(chan, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2754 | bh_unlock_sock(sk); |
| 2755 | |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 2756 | chan->ops->close(chan->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2757 | return 0; |
| 2758 | } |
| 2759 | |
| 2760 | static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2761 | { |
| 2762 | struct l2cap_info_req *req = (struct l2cap_info_req *) data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2763 | u16 type; |
| 2764 | |
| 2765 | type = __le16_to_cpu(req->type); |
| 2766 | |
| 2767 | BT_DBG("type 0x%4.4x", type); |
| 2768 | |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 2769 | if (type == L2CAP_IT_FEAT_MASK) { |
| 2770 | u8 buf[8]; |
Marcel Holtmann | 44dd46d | 2009-05-02 19:09:01 -0700 | [diff] [blame] | 2771 | u32 feat_mask = l2cap_feat_mask; |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 2772 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
| 2773 | rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 2774 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); |
Gustavo F. Padovan | d1c4a17 | 2010-07-18 16:25:54 -0300 | [diff] [blame] | 2775 | if (!disable_ertm) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2776 | feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING |
| 2777 | | L2CAP_FEAT_FCS; |
Gustavo F. Padovan | 1b7bf4e | 2009-08-24 00:45:20 -0300 | [diff] [blame] | 2778 | put_unaligned_le32(feat_mask, rsp->data); |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 2779 | l2cap_send_cmd(conn, cmd->ident, |
| 2780 | L2CAP_INFO_RSP, sizeof(buf), buf); |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 2781 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
| 2782 | u8 buf[12]; |
| 2783 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
| 2784 | rsp->type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); |
| 2785 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); |
| 2786 | memcpy(buf + 4, l2cap_fixed_chan, 8); |
| 2787 | l2cap_send_cmd(conn, cmd->ident, |
| 2788 | L2CAP_INFO_RSP, sizeof(buf), buf); |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 2789 | } else { |
| 2790 | struct l2cap_info_rsp rsp; |
| 2791 | rsp.type = cpu_to_le16(type); |
| 2792 | rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP); |
| 2793 | l2cap_send_cmd(conn, cmd->ident, |
| 2794 | L2CAP_INFO_RSP, sizeof(rsp), &rsp); |
| 2795 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2796 | |
| 2797 | return 0; |
| 2798 | } |
| 2799 | |
| 2800 | static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2801 | { |
| 2802 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; |
| 2803 | u16 type, result; |
| 2804 | |
| 2805 | type = __le16_to_cpu(rsp->type); |
| 2806 | result = __le16_to_cpu(rsp->result); |
| 2807 | |
| 2808 | BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); |
| 2809 | |
Andrei Emeltchenko | e90165b | 2011-03-25 11:31:41 +0200 | [diff] [blame] | 2810 | /* L2CAP Info req/rsp are unbound to channels, add extra checks */ |
| 2811 | if (cmd->ident != conn->info_ident || |
| 2812 | conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) |
| 2813 | return 0; |
| 2814 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2815 | del_timer(&conn->info_timer); |
| 2816 | |
Ville Tervo | adb08ed | 2010-08-04 09:43:33 +0300 | [diff] [blame] | 2817 | if (result != L2CAP_IR_SUCCESS) { |
| 2818 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
| 2819 | conn->info_ident = 0; |
| 2820 | |
| 2821 | l2cap_conn_start(conn); |
| 2822 | |
| 2823 | return 0; |
| 2824 | } |
| 2825 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2826 | if (type == L2CAP_IT_FEAT_MASK) { |
Harvey Harrison | 8398531 | 2008-05-02 16:25:46 -0700 | [diff] [blame] | 2827 | conn->feat_mask = get_unaligned_le32(rsp->data); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2828 | |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 2829 | if (conn->feat_mask & L2CAP_FEAT_FIXED_CHAN) { |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 2830 | struct l2cap_info_req req; |
| 2831 | req.type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); |
| 2832 | |
| 2833 | conn->info_ident = l2cap_get_ident(conn); |
| 2834 | |
| 2835 | l2cap_send_cmd(conn, conn->info_ident, |
| 2836 | L2CAP_INFO_REQ, sizeof(req), &req); |
| 2837 | } else { |
| 2838 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
| 2839 | conn->info_ident = 0; |
| 2840 | |
| 2841 | l2cap_conn_start(conn); |
| 2842 | } |
| 2843 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2844 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 2845 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2846 | |
| 2847 | l2cap_conn_start(conn); |
| 2848 | } |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2849 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2850 | return 0; |
| 2851 | } |
| 2852 | |
Gustavo F. Padovan | e2174ca | 2011-02-17 19:16:55 -0300 | [diff] [blame] | 2853 | 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] | 2854 | u16 to_multiplier) |
| 2855 | { |
| 2856 | u16 max_latency; |
| 2857 | |
| 2858 | if (min > max || min < 6 || max > 3200) |
| 2859 | return -EINVAL; |
| 2860 | |
| 2861 | if (to_multiplier < 10 || to_multiplier > 3200) |
| 2862 | return -EINVAL; |
| 2863 | |
| 2864 | if (max >= to_multiplier * 8) |
| 2865 | return -EINVAL; |
| 2866 | |
| 2867 | max_latency = (to_multiplier * 8 / max) - 1; |
| 2868 | if (latency > 499 || latency > max_latency) |
| 2869 | return -EINVAL; |
| 2870 | |
| 2871 | return 0; |
| 2872 | } |
| 2873 | |
| 2874 | static inline int l2cap_conn_param_update_req(struct l2cap_conn *conn, |
| 2875 | struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2876 | { |
| 2877 | struct hci_conn *hcon = conn->hcon; |
| 2878 | struct l2cap_conn_param_update_req *req; |
| 2879 | struct l2cap_conn_param_update_rsp rsp; |
| 2880 | u16 min, max, latency, to_multiplier, cmd_len; |
Claudio Takahasi | 2ce603e | 2011-02-16 20:44:53 -0200 | [diff] [blame] | 2881 | int err; |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 2882 | |
| 2883 | if (!(hcon->link_mode & HCI_LM_MASTER)) |
| 2884 | return -EINVAL; |
| 2885 | |
| 2886 | cmd_len = __le16_to_cpu(cmd->len); |
| 2887 | if (cmd_len != sizeof(struct l2cap_conn_param_update_req)) |
| 2888 | return -EPROTO; |
| 2889 | |
| 2890 | req = (struct l2cap_conn_param_update_req *) data; |
Gustavo F. Padovan | e2174ca | 2011-02-17 19:16:55 -0300 | [diff] [blame] | 2891 | min = __le16_to_cpu(req->min); |
| 2892 | max = __le16_to_cpu(req->max); |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 2893 | latency = __le16_to_cpu(req->latency); |
| 2894 | to_multiplier = __le16_to_cpu(req->to_multiplier); |
| 2895 | |
| 2896 | BT_DBG("min 0x%4.4x max 0x%4.4x latency: 0x%4.4x Timeout: 0x%4.4x", |
| 2897 | min, max, latency, to_multiplier); |
| 2898 | |
| 2899 | memset(&rsp, 0, sizeof(rsp)); |
Claudio Takahasi | 2ce603e | 2011-02-16 20:44:53 -0200 | [diff] [blame] | 2900 | |
| 2901 | err = l2cap_check_conn_param(min, max, latency, to_multiplier); |
| 2902 | if (err) |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 2903 | rsp.result = cpu_to_le16(L2CAP_CONN_PARAM_REJECTED); |
| 2904 | else |
| 2905 | rsp.result = cpu_to_le16(L2CAP_CONN_PARAM_ACCEPTED); |
| 2906 | |
| 2907 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_PARAM_UPDATE_RSP, |
| 2908 | sizeof(rsp), &rsp); |
| 2909 | |
Claudio Takahasi | 2ce603e | 2011-02-16 20:44:53 -0200 | [diff] [blame] | 2910 | if (!err) |
| 2911 | hci_le_conn_update(hcon, min, max, latency, to_multiplier); |
| 2912 | |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 2913 | return 0; |
| 2914 | } |
| 2915 | |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 2916 | static inline int l2cap_bredr_sig_cmd(struct l2cap_conn *conn, |
| 2917 | struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data) |
| 2918 | { |
| 2919 | int err = 0; |
| 2920 | |
| 2921 | switch (cmd->code) { |
| 2922 | case L2CAP_COMMAND_REJ: |
| 2923 | l2cap_command_rej(conn, cmd, data); |
| 2924 | break; |
| 2925 | |
| 2926 | case L2CAP_CONN_REQ: |
| 2927 | err = l2cap_connect_req(conn, cmd, data); |
| 2928 | break; |
| 2929 | |
| 2930 | case L2CAP_CONN_RSP: |
| 2931 | err = l2cap_connect_rsp(conn, cmd, data); |
| 2932 | break; |
| 2933 | |
| 2934 | case L2CAP_CONF_REQ: |
| 2935 | err = l2cap_config_req(conn, cmd, cmd_len, data); |
| 2936 | break; |
| 2937 | |
| 2938 | case L2CAP_CONF_RSP: |
| 2939 | err = l2cap_config_rsp(conn, cmd, data); |
| 2940 | break; |
| 2941 | |
| 2942 | case L2CAP_DISCONN_REQ: |
| 2943 | err = l2cap_disconnect_req(conn, cmd, data); |
| 2944 | break; |
| 2945 | |
| 2946 | case L2CAP_DISCONN_RSP: |
| 2947 | err = l2cap_disconnect_rsp(conn, cmd, data); |
| 2948 | break; |
| 2949 | |
| 2950 | case L2CAP_ECHO_REQ: |
| 2951 | l2cap_send_cmd(conn, cmd->ident, L2CAP_ECHO_RSP, cmd_len, data); |
| 2952 | break; |
| 2953 | |
| 2954 | case L2CAP_ECHO_RSP: |
| 2955 | break; |
| 2956 | |
| 2957 | case L2CAP_INFO_REQ: |
| 2958 | err = l2cap_information_req(conn, cmd, data); |
| 2959 | break; |
| 2960 | |
| 2961 | case L2CAP_INFO_RSP: |
| 2962 | err = l2cap_information_rsp(conn, cmd, data); |
| 2963 | break; |
| 2964 | |
| 2965 | default: |
| 2966 | BT_ERR("Unknown BR/EDR signaling command 0x%2.2x", cmd->code); |
| 2967 | err = -EINVAL; |
| 2968 | break; |
| 2969 | } |
| 2970 | |
| 2971 | return err; |
| 2972 | } |
| 2973 | |
| 2974 | static inline int l2cap_le_sig_cmd(struct l2cap_conn *conn, |
| 2975 | struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2976 | { |
| 2977 | switch (cmd->code) { |
| 2978 | case L2CAP_COMMAND_REJ: |
| 2979 | return 0; |
| 2980 | |
| 2981 | case L2CAP_CONN_PARAM_UPDATE_REQ: |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 2982 | return l2cap_conn_param_update_req(conn, cmd, data); |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 2983 | |
| 2984 | case L2CAP_CONN_PARAM_UPDATE_RSP: |
| 2985 | return 0; |
| 2986 | |
| 2987 | default: |
| 2988 | BT_ERR("Unknown LE signaling command 0x%2.2x", cmd->code); |
| 2989 | return -EINVAL; |
| 2990 | } |
| 2991 | } |
| 2992 | |
| 2993 | static inline void l2cap_sig_channel(struct l2cap_conn *conn, |
| 2994 | struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2995 | { |
| 2996 | u8 *data = skb->data; |
| 2997 | int len = skb->len; |
| 2998 | struct l2cap_cmd_hdr cmd; |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 2999 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3000 | |
| 3001 | l2cap_raw_recv(conn, skb); |
| 3002 | |
| 3003 | while (len >= L2CAP_CMD_HDR_SIZE) { |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3004 | u16 cmd_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3005 | memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); |
| 3006 | data += L2CAP_CMD_HDR_SIZE; |
| 3007 | len -= L2CAP_CMD_HDR_SIZE; |
| 3008 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3009 | cmd_len = le16_to_cpu(cmd.len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3010 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3011 | 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] | 3012 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3013 | if (cmd_len > len || !cmd.ident) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3014 | BT_DBG("corrupted command"); |
| 3015 | break; |
| 3016 | } |
| 3017 | |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 3018 | if (conn->hcon->type == LE_LINK) |
| 3019 | err = l2cap_le_sig_cmd(conn, &cmd, data); |
| 3020 | else |
| 3021 | err = l2cap_bredr_sig_cmd(conn, &cmd, cmd_len, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3022 | |
| 3023 | if (err) { |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 3024 | struct l2cap_cmd_rej_unk rej; |
Gustavo F. Padovan | 2c6d1a2 | 2011-03-23 14:38:32 -0300 | [diff] [blame] | 3025 | |
| 3026 | BT_ERR("Wrong link type (%d)", err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3027 | |
| 3028 | /* FIXME: Map err to a valid reason */ |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 3029 | rej.reason = cpu_to_le16(L2CAP_REJ_NOT_UNDERSTOOD); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3030 | l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); |
| 3031 | } |
| 3032 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3033 | data += cmd_len; |
| 3034 | len -= cmd_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3035 | } |
| 3036 | |
| 3037 | kfree_skb(skb); |
| 3038 | } |
| 3039 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3040 | 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] | 3041 | { |
| 3042 | u16 our_fcs, rcv_fcs; |
| 3043 | int hdr_size = L2CAP_HDR_SIZE + 2; |
| 3044 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3045 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3046 | skb_trim(skb, skb->len - 2); |
| 3047 | rcv_fcs = get_unaligned_le16(skb->data + skb->len); |
| 3048 | our_fcs = crc16(0, skb->data - hdr_size, skb->len + hdr_size); |
| 3049 | |
| 3050 | if (our_fcs != rcv_fcs) |
João Paulo Rechi Vita | 7a560e5 | 2010-06-22 13:56:27 -0300 | [diff] [blame] | 3051 | return -EBADMSG; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3052 | } |
| 3053 | return 0; |
| 3054 | } |
| 3055 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3056 | static inline void l2cap_send_i_or_rr_or_rnr(struct l2cap_chan *chan) |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3057 | { |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3058 | u16 control = 0; |
| 3059 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3060 | chan->frames_sent = 0; |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3061 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3062 | control |= chan->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3063 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3064 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
Gustavo F. Padovan | 6498886 | 2010-05-10 14:54:14 -0300 | [diff] [blame] | 3065 | control |= L2CAP_SUPER_RCV_NOT_READY; |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3066 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3067 | set_bit(CONN_RNR_SENT, &chan->conn_state); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3068 | } |
| 3069 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3070 | if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3071 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3072 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3073 | l2cap_ertm_send(chan); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3074 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3075 | if (!test_bit(CONN_LOCAL_BUSY, &chan->conn_state) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3076 | chan->frames_sent == 0) { |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3077 | control |= L2CAP_SUPER_RCV_READY; |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3078 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3079 | } |
| 3080 | } |
| 3081 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3082 | static int l2cap_add_to_srej_queue(struct l2cap_chan *chan, struct sk_buff *skb, u8 tx_seq, u8 sar) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3083 | { |
| 3084 | struct sk_buff *next_skb; |
João Paulo Rechi Vita | bfbacc1 | 2010-05-31 18:35:44 -0300 | [diff] [blame] | 3085 | int tx_seq_offset, next_tx_seq_offset; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3086 | |
| 3087 | bt_cb(skb)->tx_seq = tx_seq; |
| 3088 | bt_cb(skb)->sar = sar; |
| 3089 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3090 | next_skb = skb_peek(&chan->srej_q); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3091 | if (!next_skb) { |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3092 | __skb_queue_tail(&chan->srej_q, skb); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3093 | return 0; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3094 | } |
| 3095 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3096 | tx_seq_offset = (tx_seq - chan->buffer_seq) % 64; |
João Paulo Rechi Vita | bfbacc1 | 2010-05-31 18:35:44 -0300 | [diff] [blame] | 3097 | if (tx_seq_offset < 0) |
| 3098 | tx_seq_offset += 64; |
| 3099 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3100 | do { |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3101 | if (bt_cb(next_skb)->tx_seq == tx_seq) |
| 3102 | return -EINVAL; |
| 3103 | |
João Paulo Rechi Vita | bfbacc1 | 2010-05-31 18:35:44 -0300 | [diff] [blame] | 3104 | next_tx_seq_offset = (bt_cb(next_skb)->tx_seq - |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3105 | chan->buffer_seq) % 64; |
João Paulo Rechi Vita | bfbacc1 | 2010-05-31 18:35:44 -0300 | [diff] [blame] | 3106 | if (next_tx_seq_offset < 0) |
| 3107 | next_tx_seq_offset += 64; |
| 3108 | |
| 3109 | if (next_tx_seq_offset > tx_seq_offset) { |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3110 | __skb_queue_before(&chan->srej_q, next_skb, skb); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3111 | return 0; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3112 | } |
| 3113 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3114 | if (skb_queue_is_last(&chan->srej_q, next_skb)) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3115 | break; |
| 3116 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3117 | } while ((next_skb = skb_queue_next(&chan->srej_q, next_skb))); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3118 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3119 | __skb_queue_tail(&chan->srej_q, skb); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3120 | |
| 3121 | return 0; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3122 | } |
| 3123 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3124 | static int l2cap_ertm_reassembly_sdu(struct l2cap_chan *chan, struct sk_buff *skb, u16 control) |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3125 | { |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3126 | struct sk_buff *_skb; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3127 | int err; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3128 | |
| 3129 | switch (control & L2CAP_CTRL_SAR) { |
| 3130 | case L2CAP_SDU_UNSEGMENTED: |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3131 | if (test_bit(CONN_SAR_SDU, &chan->conn_state)) |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3132 | goto drop; |
| 3133 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 3134 | return chan->ops->recv(chan->data, skb); |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3135 | |
| 3136 | case L2CAP_SDU_START: |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3137 | if (test_bit(CONN_SAR_SDU, &chan->conn_state)) |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3138 | goto drop; |
| 3139 | |
Gustavo F. Padovan | 6f61fd4 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3140 | chan->sdu_len = get_unaligned_le16(skb->data); |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3141 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3142 | if (chan->sdu_len > chan->imtu) |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3143 | goto disconnect; |
| 3144 | |
Gustavo F. Padovan | 6f61fd4 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3145 | chan->sdu = bt_skb_alloc(chan->sdu_len, GFP_ATOMIC); |
| 3146 | if (!chan->sdu) |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3147 | return -ENOMEM; |
| 3148 | |
| 3149 | /* pull sdu_len bytes only after alloc, because of Local Busy |
| 3150 | * condition we have to be sure that this will be executed |
| 3151 | * only once, i.e., when alloc does not fail */ |
| 3152 | skb_pull(skb, 2); |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3153 | |
Gustavo F. Padovan | 6f61fd4 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3154 | memcpy(skb_put(chan->sdu, skb->len), skb->data, skb->len); |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3155 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3156 | set_bit(CONN_SAR_SDU, &chan->conn_state); |
Gustavo F. Padovan | 6f61fd4 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3157 | chan->partial_sdu_len = skb->len; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3158 | break; |
| 3159 | |
| 3160 | case L2CAP_SDU_CONTINUE: |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3161 | if (!test_bit(CONN_SAR_SDU, &chan->conn_state)) |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3162 | goto disconnect; |
| 3163 | |
Gustavo F. Padovan | 6f61fd4 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3164 | if (!chan->sdu) |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3165 | goto disconnect; |
| 3166 | |
Gustavo F. Padovan | 6f61fd4 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3167 | chan->partial_sdu_len += skb->len; |
| 3168 | if (chan->partial_sdu_len > chan->sdu_len) |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3169 | goto drop; |
| 3170 | |
Gustavo F. Padovan | 6f61fd4 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3171 | memcpy(skb_put(chan->sdu, skb->len), skb->data, skb->len); |
Gustavo F. Padovan | 4178ba4 | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 3172 | |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3173 | break; |
| 3174 | |
| 3175 | case L2CAP_SDU_END: |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3176 | if (!test_bit(CONN_SAR_SDU, &chan->conn_state)) |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3177 | goto disconnect; |
| 3178 | |
Gustavo F. Padovan | 6f61fd4 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3179 | if (!chan->sdu) |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3180 | goto disconnect; |
| 3181 | |
Mat Martineau | fadd192 | 2011-07-07 09:39:03 -0700 | [diff] [blame] | 3182 | chan->partial_sdu_len += skb->len; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3183 | |
Mat Martineau | fadd192 | 2011-07-07 09:39:03 -0700 | [diff] [blame] | 3184 | if (chan->partial_sdu_len > chan->imtu) |
| 3185 | goto drop; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3186 | |
Mat Martineau | fadd192 | 2011-07-07 09:39:03 -0700 | [diff] [blame] | 3187 | if (chan->partial_sdu_len != chan->sdu_len) |
| 3188 | goto drop; |
Gustavo F. Padovan | 4178ba4 | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 3189 | |
Mat Martineau | fadd192 | 2011-07-07 09:39:03 -0700 | [diff] [blame] | 3190 | memcpy(skb_put(chan->sdu, skb->len), skb->data, skb->len); |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3191 | |
Gustavo F. Padovan | 6f61fd4 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3192 | _skb = skb_clone(chan->sdu, GFP_ATOMIC); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3193 | if (!_skb) { |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3194 | return -ENOMEM; |
| 3195 | } |
| 3196 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 3197 | err = chan->ops->recv(chan->data, _skb); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3198 | if (err < 0) { |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3199 | kfree_skb(_skb); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3200 | return err; |
| 3201 | } |
| 3202 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3203 | clear_bit(CONN_SAR_SDU, &chan->conn_state); |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3204 | |
Gustavo F. Padovan | 6f61fd4 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3205 | kfree_skb(chan->sdu); |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3206 | break; |
| 3207 | } |
| 3208 | |
| 3209 | kfree_skb(skb); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3210 | return 0; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3211 | |
| 3212 | drop: |
Gustavo F. Padovan | 6f61fd4 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3213 | kfree_skb(chan->sdu); |
| 3214 | chan->sdu = NULL; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3215 | |
| 3216 | disconnect: |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 3217 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3218 | kfree_skb(skb); |
| 3219 | return 0; |
| 3220 | } |
| 3221 | |
Mat Martineau | 26f880d | 2011-07-07 09:39:01 -0700 | [diff] [blame] | 3222 | static void l2cap_ertm_enter_local_busy(struct l2cap_chan *chan) |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3223 | { |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3224 | u16 control; |
| 3225 | |
Mat Martineau | 26f880d | 2011-07-07 09:39:01 -0700 | [diff] [blame] | 3226 | BT_DBG("chan %p, Enter local busy", chan); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3227 | |
Mat Martineau | 26f880d | 2011-07-07 09:39:01 -0700 | [diff] [blame] | 3228 | set_bit(CONN_LOCAL_BUSY, &chan->conn_state); |
| 3229 | |
| 3230 | control = chan->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
| 3231 | control |= L2CAP_SUPER_RCV_NOT_READY; |
| 3232 | l2cap_send_sframe(chan, control); |
| 3233 | |
| 3234 | set_bit(CONN_RNR_SENT, &chan->conn_state); |
| 3235 | |
| 3236 | __clear_ack_timer(chan); |
| 3237 | } |
| 3238 | |
| 3239 | static void l2cap_ertm_exit_local_busy(struct l2cap_chan *chan) |
| 3240 | { |
| 3241 | u16 control; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3242 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3243 | if (!test_bit(CONN_RNR_SENT, &chan->conn_state)) |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3244 | goto done; |
| 3245 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3246 | control = chan->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3247 | control |= L2CAP_SUPER_RCV_READY | L2CAP_CTRL_POLL; |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3248 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3249 | chan->retry_count = 1; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3250 | |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3251 | __clear_retrans_timer(chan); |
| 3252 | __set_monitor_timer(chan); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3253 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3254 | set_bit(CONN_WAIT_F, &chan->conn_state); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3255 | |
| 3256 | done: |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3257 | clear_bit(CONN_LOCAL_BUSY, &chan->conn_state); |
| 3258 | clear_bit(CONN_RNR_SENT, &chan->conn_state); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3259 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 3260 | BT_DBG("chan %p, Exit local busy", chan); |
Gustavo F. Padovan | 712132e | 2010-06-21 19:39:50 -0300 | [diff] [blame] | 3261 | } |
| 3262 | |
Mat Martineau | e328140 | 2011-07-07 09:39:02 -0700 | [diff] [blame] | 3263 | void l2cap_chan_busy(struct l2cap_chan *chan, int busy) |
Gustavo F. Padovan | 712132e | 2010-06-21 19:39:50 -0300 | [diff] [blame] | 3264 | { |
Mat Martineau | e328140 | 2011-07-07 09:39:02 -0700 | [diff] [blame] | 3265 | if (chan->mode == L2CAP_MODE_ERTM) { |
| 3266 | if (busy) |
| 3267 | l2cap_ertm_enter_local_busy(chan); |
| 3268 | else |
| 3269 | l2cap_ertm_exit_local_busy(chan); |
Gustavo F. Padovan | 712132e | 2010-06-21 19:39:50 -0300 | [diff] [blame] | 3270 | } |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3271 | } |
| 3272 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3273 | static int l2cap_streaming_reassembly_sdu(struct l2cap_chan *chan, struct sk_buff *skb, u16 control) |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3274 | { |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3275 | struct sk_buff *_skb; |
| 3276 | int err = -EINVAL; |
| 3277 | |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3278 | /* |
| 3279 | * TODO: We have to notify the userland if some data is lost with the |
| 3280 | * Streaming Mode. |
| 3281 | */ |
| 3282 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3283 | switch (control & L2CAP_CTRL_SAR) { |
| 3284 | case L2CAP_SDU_UNSEGMENTED: |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3285 | if (test_bit(CONN_SAR_SDU, &chan->conn_state)) { |
Gustavo F. Padovan | 6f61fd4 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3286 | kfree_skb(chan->sdu); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3287 | break; |
| 3288 | } |
| 3289 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 3290 | err = chan->ops->recv(chan->data, skb); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3291 | if (!err) |
| 3292 | return 0; |
| 3293 | |
| 3294 | break; |
| 3295 | |
| 3296 | case L2CAP_SDU_START: |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3297 | if (test_bit(CONN_SAR_SDU, &chan->conn_state)) { |
Gustavo F. Padovan | 6f61fd4 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3298 | kfree_skb(chan->sdu); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3299 | break; |
| 3300 | } |
| 3301 | |
Gustavo F. Padovan | 6f61fd4 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3302 | chan->sdu_len = get_unaligned_le16(skb->data); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3303 | skb_pull(skb, 2); |
| 3304 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3305 | if (chan->sdu_len > chan->imtu) { |
Gustavo F. Padovan | 052897c | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 3306 | err = -EMSGSIZE; |
| 3307 | break; |
| 3308 | } |
| 3309 | |
Gustavo F. Padovan | 6f61fd4 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3310 | chan->sdu = bt_skb_alloc(chan->sdu_len, GFP_ATOMIC); |
| 3311 | if (!chan->sdu) { |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3312 | err = -ENOMEM; |
| 3313 | break; |
| 3314 | } |
| 3315 | |
Gustavo F. Padovan | 6f61fd4 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3316 | memcpy(skb_put(chan->sdu, skb->len), skb->data, skb->len); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3317 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3318 | set_bit(CONN_SAR_SDU, &chan->conn_state); |
Gustavo F. Padovan | 6f61fd4 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3319 | chan->partial_sdu_len = skb->len; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3320 | err = 0; |
| 3321 | break; |
| 3322 | |
| 3323 | case L2CAP_SDU_CONTINUE: |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3324 | if (!test_bit(CONN_SAR_SDU, &chan->conn_state)) |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3325 | break; |
| 3326 | |
Gustavo F. Padovan | 6f61fd4 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3327 | memcpy(skb_put(chan->sdu, skb->len), skb->data, skb->len); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3328 | |
Gustavo F. Padovan | 6f61fd4 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3329 | chan->partial_sdu_len += skb->len; |
| 3330 | if (chan->partial_sdu_len > chan->sdu_len) |
| 3331 | kfree_skb(chan->sdu); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3332 | else |
| 3333 | err = 0; |
| 3334 | |
| 3335 | break; |
| 3336 | |
| 3337 | case L2CAP_SDU_END: |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3338 | if (!test_bit(CONN_SAR_SDU, &chan->conn_state)) |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3339 | break; |
| 3340 | |
Gustavo F. Padovan | 6f61fd4 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3341 | memcpy(skb_put(chan->sdu, skb->len), skb->data, skb->len); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3342 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3343 | clear_bit(CONN_SAR_SDU, &chan->conn_state); |
Gustavo F. Padovan | 6f61fd4 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3344 | chan->partial_sdu_len += skb->len; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3345 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3346 | if (chan->partial_sdu_len > chan->imtu) |
Gustavo F. Padovan | 36f2fd5 | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3347 | goto drop; |
| 3348 | |
Gustavo F. Padovan | 6f61fd4 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3349 | if (chan->partial_sdu_len == chan->sdu_len) { |
| 3350 | _skb = skb_clone(chan->sdu, GFP_ATOMIC); |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 3351 | err = chan->ops->recv(chan->data, _skb); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3352 | if (err < 0) |
| 3353 | kfree_skb(_skb); |
| 3354 | } |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3355 | err = 0; |
| 3356 | |
Gustavo F. Padovan | 36f2fd5 | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3357 | drop: |
Gustavo F. Padovan | 6f61fd4 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3358 | kfree_skb(chan->sdu); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3359 | break; |
| 3360 | } |
| 3361 | |
| 3362 | kfree_skb(skb); |
| 3363 | return err; |
| 3364 | } |
| 3365 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3366 | static void l2cap_check_srej_gap(struct l2cap_chan *chan, u8 tx_seq) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3367 | { |
| 3368 | struct sk_buff *skb; |
Gustavo F. Padovan | afefdbc | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 3369 | u16 control; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3370 | |
Mat Martineau | e328140 | 2011-07-07 09:39:02 -0700 | [diff] [blame] | 3371 | while ((skb = skb_peek(&chan->srej_q)) && |
| 3372 | !test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
| 3373 | int err; |
| 3374 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3375 | if (bt_cb(skb)->tx_seq != tx_seq) |
| 3376 | break; |
| 3377 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3378 | skb = skb_dequeue(&chan->srej_q); |
Gustavo F. Padovan | afefdbc | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 3379 | control = bt_cb(skb)->sar << L2CAP_CTRL_SAR_SHIFT; |
Mat Martineau | e328140 | 2011-07-07 09:39:02 -0700 | [diff] [blame] | 3380 | err = l2cap_ertm_reassembly_sdu(chan, skb, control); |
| 3381 | |
| 3382 | if (err < 0) { |
| 3383 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
| 3384 | break; |
| 3385 | } |
| 3386 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3387 | chan->buffer_seq_srej = |
| 3388 | (chan->buffer_seq_srej + 1) % 64; |
Gustavo F. Padovan | 8ff50ec | 2010-05-10 19:34:11 -0300 | [diff] [blame] | 3389 | tx_seq = (tx_seq + 1) % 64; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3390 | } |
| 3391 | } |
| 3392 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3393 | static void l2cap_resend_srejframe(struct l2cap_chan *chan, u8 tx_seq) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3394 | { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3395 | struct srej_list *l, *tmp; |
| 3396 | u16 control; |
| 3397 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 3398 | list_for_each_entry_safe(l, tmp, &chan->srej_l, list) { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3399 | if (l->tx_seq == tx_seq) { |
| 3400 | list_del(&l->list); |
| 3401 | kfree(l); |
| 3402 | return; |
| 3403 | } |
| 3404 | control = L2CAP_SUPER_SELECT_REJECT; |
| 3405 | control |= l->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3406 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3407 | list_del(&l->list); |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 3408 | list_add_tail(&l->list, &chan->srej_l); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3409 | } |
| 3410 | } |
| 3411 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3412 | static void l2cap_send_srejframe(struct l2cap_chan *chan, u8 tx_seq) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3413 | { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3414 | struct srej_list *new; |
| 3415 | u16 control; |
| 3416 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3417 | while (tx_seq != chan->expected_tx_seq) { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3418 | control = L2CAP_SUPER_SELECT_REJECT; |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3419 | control |= chan->expected_tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3420 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3421 | |
| 3422 | new = kzalloc(sizeof(struct srej_list), GFP_ATOMIC); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3423 | new->tx_seq = chan->expected_tx_seq; |
| 3424 | chan->expected_tx_seq = (chan->expected_tx_seq + 1) % 64; |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 3425 | list_add_tail(&new->list, &chan->srej_l); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3426 | } |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3427 | chan->expected_tx_seq = (chan->expected_tx_seq + 1) % 64; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3428 | } |
| 3429 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3430 | static inline int l2cap_data_channel_iframe(struct l2cap_chan *chan, u16 rx_control, struct sk_buff *skb) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3431 | { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3432 | u8 tx_seq = __get_txseq(rx_control); |
Gustavo F. Padovan | 9f121a5 | 2009-10-03 02:34:38 -0300 | [diff] [blame] | 3433 | u8 req_seq = __get_reqseq(rx_control); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3434 | u8 sar = rx_control >> L2CAP_CTRL_SAR_SHIFT; |
Gustavo F. Padovan | f6337c7 | 2010-05-10 18:32:04 -0300 | [diff] [blame] | 3435 | int tx_seq_offset, expected_tx_seq_offset; |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3436 | int num_to_ack = (chan->tx_win/6) + 1; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3437 | int err = 0; |
| 3438 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3439 | BT_DBG("chan %p len %d tx_seq %d rx_control 0x%4.4x", chan, skb->len, |
| 3440 | tx_seq, rx_control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3441 | |
Gustavo F. Padovan | 9b16dc6 | 2010-05-05 20:05:57 -0300 | [diff] [blame] | 3442 | if (L2CAP_CTRL_FINAL & rx_control && |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3443 | test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3444 | __clear_monitor_timer(chan); |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3445 | if (chan->unacked_frames > 0) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3446 | __set_retrans_timer(chan); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3447 | clear_bit(CONN_WAIT_F, &chan->conn_state); |
Gustavo F. Padovan | 1d8f5d1 | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3448 | } |
| 3449 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3450 | chan->expected_ack_seq = req_seq; |
| 3451 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | 9f121a5 | 2009-10-03 02:34:38 -0300 | [diff] [blame] | 3452 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3453 | tx_seq_offset = (tx_seq - chan->buffer_seq) % 64; |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3454 | if (tx_seq_offset < 0) |
| 3455 | tx_seq_offset += 64; |
| 3456 | |
| 3457 | /* invalid tx_seq */ |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3458 | if (tx_seq_offset >= chan->tx_win) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 3459 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3460 | goto drop; |
| 3461 | } |
| 3462 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3463 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3464 | goto drop; |
| 3465 | |
Mat Martineau | 02f1b64 | 2011-06-29 14:35:19 -0700 | [diff] [blame] | 3466 | if (tx_seq == chan->expected_tx_seq) |
| 3467 | goto expected; |
| 3468 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3469 | if (test_bit(CONN_SREJ_SENT, &chan->conn_state)) { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3470 | struct srej_list *first; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3471 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 3472 | first = list_first_entry(&chan->srej_l, |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3473 | struct srej_list, list); |
| 3474 | if (tx_seq == first->tx_seq) { |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3475 | l2cap_add_to_srej_queue(chan, skb, tx_seq, sar); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3476 | l2cap_check_srej_gap(chan, tx_seq); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3477 | |
| 3478 | list_del(&first->list); |
| 3479 | kfree(first); |
| 3480 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 3481 | if (list_empty(&chan->srej_l)) { |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3482 | chan->buffer_seq = chan->buffer_seq_srej; |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3483 | clear_bit(CONN_SREJ_SENT, &chan->conn_state); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3484 | l2cap_send_ack(chan); |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 3485 | BT_DBG("chan %p, Exit SREJ_SENT", chan); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3486 | } |
| 3487 | } else { |
| 3488 | struct srej_list *l; |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3489 | |
| 3490 | /* duplicated tx_seq */ |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3491 | if (l2cap_add_to_srej_queue(chan, skb, tx_seq, sar) < 0) |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3492 | goto drop; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3493 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 3494 | list_for_each_entry(l, &chan->srej_l, list) { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3495 | if (l->tx_seq == tx_seq) { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3496 | l2cap_resend_srejframe(chan, tx_seq); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3497 | return 0; |
| 3498 | } |
| 3499 | } |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3500 | l2cap_send_srejframe(chan, tx_seq); |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3501 | } |
| 3502 | } else { |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3503 | expected_tx_seq_offset = |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3504 | (chan->expected_tx_seq - chan->buffer_seq) % 64; |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3505 | if (expected_tx_seq_offset < 0) |
| 3506 | expected_tx_seq_offset += 64; |
| 3507 | |
| 3508 | /* duplicated tx_seq */ |
| 3509 | if (tx_seq_offset < expected_tx_seq_offset) |
| 3510 | goto drop; |
| 3511 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3512 | set_bit(CONN_SREJ_SENT, &chan->conn_state); |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3513 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 3514 | BT_DBG("chan %p, Enter SREJ", chan); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 3515 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 3516 | INIT_LIST_HEAD(&chan->srej_l); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3517 | chan->buffer_seq_srej = chan->buffer_seq; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3518 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3519 | __skb_queue_head_init(&chan->srej_q); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3520 | l2cap_add_to_srej_queue(chan, skb, tx_seq, sar); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3521 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3522 | set_bit(CONN_SEND_PBIT, &chan->conn_state); |
Gustavo F. Padovan | ef54fd9 | 2009-08-20 22:26:04 -0300 | [diff] [blame] | 3523 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3524 | l2cap_send_srejframe(chan, tx_seq); |
Gustavo F. Padovan | 7fe9b29 | 2010-05-12 18:32:04 -0300 | [diff] [blame] | 3525 | |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3526 | __clear_ack_timer(chan); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3527 | } |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3528 | return 0; |
| 3529 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3530 | expected: |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3531 | chan->expected_tx_seq = (chan->expected_tx_seq + 1) % 64; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3532 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3533 | if (test_bit(CONN_SREJ_SENT, &chan->conn_state)) { |
Gustavo F. Padovan | 3b1a9f3 | 2010-05-01 16:15:42 -0300 | [diff] [blame] | 3534 | bt_cb(skb)->tx_seq = tx_seq; |
| 3535 | bt_cb(skb)->sar = sar; |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3536 | __skb_queue_tail(&chan->srej_q, skb); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3537 | return 0; |
| 3538 | } |
| 3539 | |
Mat Martineau | fadd192 | 2011-07-07 09:39:03 -0700 | [diff] [blame] | 3540 | err = l2cap_ertm_reassembly_sdu(chan, skb, rx_control); |
| 3541 | chan->buffer_seq = (chan->buffer_seq + 1) % 64; |
Mat Martineau | e328140 | 2011-07-07 09:39:02 -0700 | [diff] [blame] | 3542 | if (err < 0) { |
| 3543 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
| 3544 | return err; |
| 3545 | } |
Gustavo F. Padovan | 2ece368 | 2010-06-16 17:21:44 -0300 | [diff] [blame] | 3546 | |
Gustavo F. Padovan | 4ec10d9 | 2009-10-03 02:34:39 -0300 | [diff] [blame] | 3547 | if (rx_control & L2CAP_CTRL_FINAL) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3548 | if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3549 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | 4ec10d9 | 2009-10-03 02:34:39 -0300 | [diff] [blame] | 3550 | } |
| 3551 | |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3552 | __set_ack_timer(chan); |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3553 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3554 | chan->num_acked = (chan->num_acked + 1) % num_to_ack; |
| 3555 | if (chan->num_acked == num_to_ack - 1) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3556 | l2cap_send_ack(chan); |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3557 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3558 | return 0; |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3559 | |
| 3560 | drop: |
| 3561 | kfree_skb(skb); |
| 3562 | return 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3563 | } |
| 3564 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3565 | static inline void l2cap_data_channel_rrframe(struct l2cap_chan *chan, u16 rx_control) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3566 | { |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 3567 | BT_DBG("chan %p, req_seq %d ctrl 0x%4.4x", chan, __get_reqseq(rx_control), |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 3568 | rx_control); |
| 3569 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3570 | chan->expected_ack_seq = __get_reqseq(rx_control); |
| 3571 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3572 | |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3573 | if (rx_control & L2CAP_CTRL_POLL) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3574 | set_bit(CONN_SEND_FBIT, &chan->conn_state); |
| 3575 | if (test_bit(CONN_SREJ_SENT, &chan->conn_state)) { |
| 3576 | if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3577 | (chan->unacked_frames > 0)) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3578 | __set_retrans_timer(chan); |
Gustavo F. Padovan | 05fbd89 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3579 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3580 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3581 | l2cap_send_srejtail(chan); |
Gustavo F. Padovan | 05fbd89 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3582 | } else { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3583 | l2cap_send_i_or_rr_or_rnr(chan); |
Gustavo F. Padovan | 05fbd89 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3584 | } |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3585 | |
| 3586 | } else if (rx_control & L2CAP_CTRL_FINAL) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3587 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3588 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3589 | if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3590 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3591 | |
| 3592 | } else { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3593 | if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3594 | (chan->unacked_frames > 0)) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3595 | __set_retrans_timer(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3596 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3597 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
| 3598 | if (test_bit(CONN_SREJ_SENT, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3599 | l2cap_send_ack(chan); |
Andrei Emeltchenko | 894718a | 2010-12-01 16:58:24 +0200 | [diff] [blame] | 3600 | else |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3601 | l2cap_ertm_send(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3602 | } |
| 3603 | } |
| 3604 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3605 | static inline void l2cap_data_channel_rejframe(struct l2cap_chan *chan, u16 rx_control) |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3606 | { |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3607 | u8 tx_seq = __get_reqseq(rx_control); |
| 3608 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3609 | BT_DBG("chan %p, req_seq %d ctrl 0x%4.4x", chan, tx_seq, rx_control); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 3610 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3611 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3612 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3613 | chan->expected_ack_seq = tx_seq; |
| 3614 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3615 | |
| 3616 | if (rx_control & L2CAP_CTRL_FINAL) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3617 | if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3618 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3619 | } else { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3620 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3621 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3622 | if (test_bit(CONN_WAIT_F, &chan->conn_state)) |
| 3623 | set_bit(CONN_REJ_ACT, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3624 | } |
| 3625 | } |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3626 | static inline void l2cap_data_channel_srejframe(struct l2cap_chan *chan, u16 rx_control) |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3627 | { |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3628 | u8 tx_seq = __get_reqseq(rx_control); |
| 3629 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3630 | BT_DBG("chan %p, req_seq %d ctrl 0x%4.4x", chan, tx_seq, rx_control); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 3631 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3632 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3633 | |
| 3634 | if (rx_control & L2CAP_CTRL_POLL) { |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3635 | chan->expected_ack_seq = tx_seq; |
| 3636 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 3637 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3638 | set_bit(CONN_SEND_FBIT, &chan->conn_state); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3639 | l2cap_retransmit_one_frame(chan, tx_seq); |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 3640 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3641 | l2cap_ertm_send(chan); |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 3642 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3643 | if (test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3644 | chan->srej_save_reqseq = tx_seq; |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3645 | set_bit(CONN_SREJ_ACT, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3646 | } |
| 3647 | } else if (rx_control & L2CAP_CTRL_FINAL) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3648 | if (test_bit(CONN_SREJ_ACT, &chan->conn_state) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3649 | chan->srej_save_reqseq == tx_seq) |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3650 | clear_bit(CONN_SREJ_ACT, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3651 | else |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3652 | l2cap_retransmit_one_frame(chan, tx_seq); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3653 | } else { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3654 | l2cap_retransmit_one_frame(chan, tx_seq); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3655 | if (test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3656 | chan->srej_save_reqseq = tx_seq; |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3657 | set_bit(CONN_SREJ_ACT, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3658 | } |
| 3659 | } |
| 3660 | } |
| 3661 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3662 | static inline void l2cap_data_channel_rnrframe(struct l2cap_chan *chan, u16 rx_control) |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3663 | { |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3664 | u8 tx_seq = __get_reqseq(rx_control); |
| 3665 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3666 | BT_DBG("chan %p, req_seq %d ctrl 0x%4.4x", chan, tx_seq, rx_control); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 3667 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3668 | set_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3669 | chan->expected_ack_seq = tx_seq; |
| 3670 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3671 | |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 3672 | if (rx_control & L2CAP_CTRL_POLL) |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3673 | set_bit(CONN_SEND_FBIT, &chan->conn_state); |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 3674 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3675 | if (!test_bit(CONN_SREJ_SENT, &chan->conn_state)) { |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3676 | __clear_retrans_timer(chan); |
Gustavo F. Padovan | a2e12a2 | 2010-05-05 19:58:27 -0300 | [diff] [blame] | 3677 | if (rx_control & L2CAP_CTRL_POLL) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3678 | l2cap_send_rr_or_rnr(chan, L2CAP_CTRL_FINAL); |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3679 | return; |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3680 | } |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3681 | |
| 3682 | if (rx_control & L2CAP_CTRL_POLL) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3683 | l2cap_send_srejtail(chan); |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3684 | else |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3685 | l2cap_send_sframe(chan, L2CAP_SUPER_RCV_READY); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3686 | } |
| 3687 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3688 | static inline int l2cap_data_channel_sframe(struct l2cap_chan *chan, u16 rx_control, struct sk_buff *skb) |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3689 | { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3690 | BT_DBG("chan %p rx_control 0x%4.4x len %d", chan, rx_control, skb->len); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3691 | |
Gustavo F. Padovan | 9b16dc6 | 2010-05-05 20:05:57 -0300 | [diff] [blame] | 3692 | if (L2CAP_CTRL_FINAL & rx_control && |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3693 | test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3694 | __clear_monitor_timer(chan); |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3695 | if (chan->unacked_frames > 0) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3696 | __set_retrans_timer(chan); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3697 | clear_bit(CONN_WAIT_F, &chan->conn_state); |
Gustavo F. Padovan | 1d8f5d1 | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3698 | } |
| 3699 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3700 | switch (rx_control & L2CAP_CTRL_SUPERVISE) { |
| 3701 | case L2CAP_SUPER_RCV_READY: |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3702 | l2cap_data_channel_rrframe(chan, rx_control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3703 | break; |
| 3704 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3705 | case L2CAP_SUPER_REJECT: |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3706 | l2cap_data_channel_rejframe(chan, rx_control); |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3707 | break; |
| 3708 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3709 | case L2CAP_SUPER_SELECT_REJECT: |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3710 | l2cap_data_channel_srejframe(chan, rx_control); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3711 | break; |
| 3712 | |
| 3713 | case L2CAP_SUPER_RCV_NOT_READY: |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3714 | l2cap_data_channel_rnrframe(chan, rx_control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3715 | break; |
| 3716 | } |
| 3717 | |
Gustavo F. Padovan | faaebd1 | 2010-05-01 16:15:35 -0300 | [diff] [blame] | 3718 | kfree_skb(skb); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3719 | return 0; |
| 3720 | } |
| 3721 | |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3722 | static int l2cap_ertm_data_rcv(struct sock *sk, struct sk_buff *skb) |
| 3723 | { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3724 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3725 | u16 control; |
| 3726 | u8 req_seq; |
| 3727 | int len, next_tx_seq_offset, req_seq_offset; |
| 3728 | |
| 3729 | control = get_unaligned_le16(skb->data); |
| 3730 | skb_pull(skb, 2); |
| 3731 | len = skb->len; |
| 3732 | |
| 3733 | /* |
| 3734 | * We can just drop the corrupted I-frame here. |
| 3735 | * Receiver will miss it and start proper recovery |
| 3736 | * procedures and ask retransmission. |
| 3737 | */ |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3738 | if (l2cap_check_fcs(chan, skb)) |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3739 | goto drop; |
| 3740 | |
| 3741 | if (__is_sar_start(control) && __is_iframe(control)) |
| 3742 | len -= 2; |
| 3743 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3744 | if (chan->fcs == L2CAP_FCS_CRC16) |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3745 | len -= 2; |
| 3746 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3747 | if (len > chan->mps) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 3748 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3749 | goto drop; |
| 3750 | } |
| 3751 | |
| 3752 | req_seq = __get_reqseq(control); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3753 | req_seq_offset = (req_seq - chan->expected_ack_seq) % 64; |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3754 | if (req_seq_offset < 0) |
| 3755 | req_seq_offset += 64; |
| 3756 | |
| 3757 | next_tx_seq_offset = |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3758 | (chan->next_tx_seq - chan->expected_ack_seq) % 64; |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3759 | if (next_tx_seq_offset < 0) |
| 3760 | next_tx_seq_offset += 64; |
| 3761 | |
| 3762 | /* check for invalid req-seq */ |
| 3763 | if (req_seq_offset > next_tx_seq_offset) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 3764 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3765 | goto drop; |
| 3766 | } |
| 3767 | |
| 3768 | if (__is_iframe(control)) { |
| 3769 | if (len < 0) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 3770 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3771 | goto drop; |
| 3772 | } |
| 3773 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3774 | l2cap_data_channel_iframe(chan, control, skb); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3775 | } else { |
| 3776 | if (len != 0) { |
| 3777 | BT_ERR("%d", len); |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 3778 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3779 | goto drop; |
| 3780 | } |
| 3781 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3782 | l2cap_data_channel_sframe(chan, control, skb); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3783 | } |
| 3784 | |
| 3785 | return 0; |
| 3786 | |
| 3787 | drop: |
| 3788 | kfree_skb(skb); |
| 3789 | return 0; |
| 3790 | } |
| 3791 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3792 | static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) |
| 3793 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3794 | struct l2cap_chan *chan; |
David S. Miller | bf73484 | 2011-04-25 13:03:02 -0700 | [diff] [blame] | 3795 | struct sock *sk = NULL; |
Nathan Holstein | 51893f8 | 2010-06-09 15:46:25 -0400 | [diff] [blame] | 3796 | u16 control; |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3797 | u8 tx_seq; |
| 3798 | int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3799 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 3800 | chan = l2cap_get_chan_by_scid(conn, cid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3801 | if (!chan) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3802 | BT_DBG("unknown cid 0x%4.4x", cid); |
| 3803 | goto drop; |
| 3804 | } |
| 3805 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3806 | sk = chan->sk; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3807 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 3808 | BT_DBG("chan %p, len %d", chan, skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3809 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 3810 | if (chan->state != BT_CONNECTED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3811 | goto drop; |
| 3812 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3813 | switch (chan->mode) { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3814 | case L2CAP_MODE_BASIC: |
| 3815 | /* If socket recv buffers overflows we drop data here |
| 3816 | * which is *bad* because L2CAP has to be reliable. |
| 3817 | * But we don't have any other choice. L2CAP doesn't |
| 3818 | * provide flow control mechanism. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3819 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3820 | if (chan->imtu < skb->len) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3821 | goto drop; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3822 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 3823 | if (!chan->ops->recv(chan->data, skb)) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3824 | goto done; |
| 3825 | break; |
| 3826 | |
| 3827 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3828 | if (!sock_owned_by_user(sk)) { |
| 3829 | l2cap_ertm_data_rcv(sk, skb); |
Gustavo F. Padovan | 277ffbe | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3830 | } else { |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3831 | if (sk_add_backlog(sk, skb)) |
Gustavo F. Padovan | 277ffbe | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3832 | goto drop; |
Gustavo F. Padovan | 277ffbe | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3833 | } |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3834 | |
Andrei Emeltchenko | fcafde2 | 2009-12-22 15:58:08 +0200 | [diff] [blame] | 3835 | goto done; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3836 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3837 | case L2CAP_MODE_STREAMING: |
| 3838 | control = get_unaligned_le16(skb->data); |
| 3839 | skb_pull(skb, 2); |
| 3840 | len = skb->len; |
| 3841 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3842 | if (l2cap_check_fcs(chan, skb)) |
Gustavo F. Padovan | 2600008 | 2010-05-11 22:02:00 -0300 | [diff] [blame] | 3843 | goto drop; |
| 3844 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3845 | if (__is_sar_start(control)) |
| 3846 | len -= 2; |
| 3847 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3848 | if (chan->fcs == L2CAP_FCS_CRC16) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3849 | len -= 2; |
| 3850 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3851 | if (len > chan->mps || len < 0 || __is_sframe(control)) |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3852 | goto drop; |
| 3853 | |
| 3854 | tx_seq = __get_txseq(control); |
| 3855 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3856 | if (chan->expected_tx_seq == tx_seq) |
| 3857 | chan->expected_tx_seq = (chan->expected_tx_seq + 1) % 64; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3858 | else |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3859 | chan->expected_tx_seq = (tx_seq + 1) % 64; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3860 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3861 | l2cap_streaming_reassembly_sdu(chan, skb, control); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3862 | |
| 3863 | goto done; |
| 3864 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3865 | default: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3866 | 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] | 3867 | break; |
| 3868 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3869 | |
| 3870 | drop: |
| 3871 | kfree_skb(skb); |
| 3872 | |
| 3873 | done: |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 3874 | if (sk) |
| 3875 | bh_unlock_sock(sk); |
| 3876 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3877 | return 0; |
| 3878 | } |
| 3879 | |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 3880 | static inline int l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3881 | { |
David S. Miller | 6dcae1e | 2011-05-16 23:09:26 -0400 | [diff] [blame] | 3882 | struct sock *sk = NULL; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 3883 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3884 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 3885 | chan = l2cap_global_chan_by_psm(0, psm, conn->src); |
| 3886 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3887 | goto drop; |
| 3888 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 3889 | sk = chan->sk; |
| 3890 | |
Gustavo F. Padovan | e0f0cb5 | 2010-11-01 18:43:53 +0000 | [diff] [blame] | 3891 | bh_lock_sock(sk); |
| 3892 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3893 | BT_DBG("sk %p, len %d", sk, skb->len); |
| 3894 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 3895 | if (chan->state != BT_BOUND && chan->state != BT_CONNECTED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3896 | goto drop; |
| 3897 | |
Vinicius Costa Gomes | e13e21d | 2011-06-17 22:46:27 -0300 | [diff] [blame] | 3898 | if (chan->imtu < skb->len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3899 | goto drop; |
| 3900 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 3901 | if (!chan->ops->recv(chan->data, skb)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3902 | goto done; |
| 3903 | |
| 3904 | drop: |
| 3905 | kfree_skb(skb); |
| 3906 | |
| 3907 | done: |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 3908 | if (sk) |
| 3909 | bh_unlock_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3910 | return 0; |
| 3911 | } |
| 3912 | |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 3913 | static inline int l2cap_att_channel(struct l2cap_conn *conn, __le16 cid, struct sk_buff *skb) |
| 3914 | { |
David S. Miller | 6dcae1e | 2011-05-16 23:09:26 -0400 | [diff] [blame] | 3915 | struct sock *sk = NULL; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 3916 | struct l2cap_chan *chan; |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 3917 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 3918 | chan = l2cap_global_chan_by_scid(0, cid, conn->src); |
| 3919 | if (!chan) |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 3920 | goto drop; |
| 3921 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 3922 | sk = chan->sk; |
| 3923 | |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 3924 | bh_lock_sock(sk); |
| 3925 | |
| 3926 | BT_DBG("sk %p, len %d", sk, skb->len); |
| 3927 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 3928 | if (chan->state != BT_BOUND && chan->state != BT_CONNECTED) |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 3929 | goto drop; |
| 3930 | |
Vinicius Costa Gomes | e13e21d | 2011-06-17 22:46:27 -0300 | [diff] [blame] | 3931 | if (chan->imtu < skb->len) |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 3932 | goto drop; |
| 3933 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 3934 | if (!chan->ops->recv(chan->data, skb)) |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 3935 | goto done; |
| 3936 | |
| 3937 | drop: |
| 3938 | kfree_skb(skb); |
| 3939 | |
| 3940 | done: |
| 3941 | if (sk) |
| 3942 | bh_unlock_sock(sk); |
| 3943 | return 0; |
| 3944 | } |
| 3945 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3946 | static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) |
| 3947 | { |
| 3948 | struct l2cap_hdr *lh = (void *) skb->data; |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 3949 | u16 cid, len; |
| 3950 | __le16 psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3951 | |
| 3952 | skb_pull(skb, L2CAP_HDR_SIZE); |
| 3953 | cid = __le16_to_cpu(lh->cid); |
| 3954 | len = __le16_to_cpu(lh->len); |
| 3955 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3956 | if (len != skb->len) { |
| 3957 | kfree_skb(skb); |
| 3958 | return; |
| 3959 | } |
| 3960 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3961 | BT_DBG("len %d, cid 0x%4.4x", len, cid); |
| 3962 | |
| 3963 | switch (cid) { |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 3964 | case L2CAP_CID_LE_SIGNALING: |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 3965 | case L2CAP_CID_SIGNALING: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3966 | l2cap_sig_channel(conn, skb); |
| 3967 | break; |
| 3968 | |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 3969 | case L2CAP_CID_CONN_LESS: |
Gustavo F. Padovan | 1b7bf4e | 2009-08-24 00:45:20 -0300 | [diff] [blame] | 3970 | psm = get_unaligned_le16(skb->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3971 | skb_pull(skb, 2); |
| 3972 | l2cap_conless_channel(conn, psm, skb); |
| 3973 | break; |
| 3974 | |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 3975 | case L2CAP_CID_LE_DATA: |
| 3976 | l2cap_att_channel(conn, cid, skb); |
| 3977 | break; |
| 3978 | |
Anderson Briglia | b501d6a | 2011-06-07 18:46:31 -0300 | [diff] [blame] | 3979 | case L2CAP_CID_SMP: |
| 3980 | if (smp_sig_channel(conn, skb)) |
| 3981 | l2cap_conn_del(conn->hcon, EACCES); |
| 3982 | break; |
| 3983 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3984 | default: |
| 3985 | l2cap_data_channel(conn, cid, skb); |
| 3986 | break; |
| 3987 | } |
| 3988 | } |
| 3989 | |
| 3990 | /* ---- L2CAP interface with lower layer (HCI) ---- */ |
| 3991 | |
| 3992 | static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) |
| 3993 | { |
| 3994 | int exact = 0, lm1 = 0, lm2 = 0; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 3995 | struct l2cap_chan *c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3996 | |
| 3997 | if (type != ACL_LINK) |
João Paulo Rechi Vita | 963cf68 | 2010-06-22 13:56:28 -0300 | [diff] [blame] | 3998 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3999 | |
| 4000 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); |
| 4001 | |
| 4002 | /* Find listening sockets and check their link_mode */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4003 | read_lock(&chan_list_lock); |
| 4004 | list_for_each_entry(c, &chan_list, global_l) { |
| 4005 | struct sock *sk = c->sk; |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4006 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4007 | if (c->state != BT_LISTEN) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4008 | continue; |
| 4009 | |
| 4010 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 4011 | lm1 |= HCI_LM_ACCEPT; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4012 | if (c->role_switch) |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 4013 | lm1 |= HCI_LM_MASTER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4014 | exact++; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 4015 | } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { |
| 4016 | lm2 |= HCI_LM_ACCEPT; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4017 | if (c->role_switch) |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 4018 | lm2 |= HCI_LM_MASTER; |
| 4019 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4020 | } |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4021 | read_unlock(&chan_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4022 | |
| 4023 | return exact ? lm1 : lm2; |
| 4024 | } |
| 4025 | |
| 4026 | static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) |
| 4027 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4028 | struct l2cap_conn *conn; |
| 4029 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4030 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); |
| 4031 | |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 4032 | if (!(hcon->type == ACL_LINK || hcon->type == LE_LINK)) |
João Paulo Rechi Vita | 963cf68 | 2010-06-22 13:56:28 -0300 | [diff] [blame] | 4033 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4034 | |
| 4035 | if (!status) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4036 | conn = l2cap_conn_add(hcon, status); |
| 4037 | if (conn) |
| 4038 | l2cap_conn_ready(conn); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4039 | } else |
Joe Perches | e175072 | 2011-06-29 18:18:29 -0700 | [diff] [blame] | 4040 | l2cap_conn_del(hcon, bt_to_errno(status)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4041 | |
| 4042 | return 0; |
| 4043 | } |
| 4044 | |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 4045 | static int l2cap_disconn_ind(struct hci_conn *hcon) |
| 4046 | { |
| 4047 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 4048 | |
| 4049 | BT_DBG("hcon %p", hcon); |
| 4050 | |
Gustavo F. Padovan | b569450 | 2011-06-08 19:09:13 -0300 | [diff] [blame] | 4051 | if ((hcon->type != ACL_LINK && hcon->type != LE_LINK) || !conn) |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 4052 | return 0x13; |
| 4053 | |
| 4054 | return conn->disc_reason; |
| 4055 | } |
| 4056 | |
| 4057 | static int l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4058 | { |
| 4059 | BT_DBG("hcon %p reason %d", hcon, reason); |
| 4060 | |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 4061 | if (!(hcon->type == ACL_LINK || hcon->type == LE_LINK)) |
João Paulo Rechi Vita | 963cf68 | 2010-06-22 13:56:28 -0300 | [diff] [blame] | 4062 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4063 | |
Joe Perches | e175072 | 2011-06-29 18:18:29 -0700 | [diff] [blame] | 4064 | l2cap_conn_del(hcon, bt_to_errno(reason)); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4065 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4066 | return 0; |
| 4067 | } |
| 4068 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4069 | static inline void l2cap_check_encryption(struct l2cap_chan *chan, u8 encrypt) |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4070 | { |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 4071 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) |
Marcel Holtmann | 255c760 | 2009-02-04 21:07:19 +0100 | [diff] [blame] | 4072 | return; |
| 4073 | |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4074 | if (encrypt == 0x00) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4075 | if (chan->sec_level == BT_SECURITY_MEDIUM) { |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 4076 | __clear_chan_timer(chan); |
| 4077 | __set_chan_timer(chan, HZ * 5); |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4078 | } else if (chan->sec_level == BT_SECURITY_HIGH) |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 4079 | l2cap_chan_close(chan, ECONNREFUSED); |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4080 | } else { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4081 | if (chan->sec_level == BT_SECURITY_MEDIUM) |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 4082 | __clear_chan_timer(chan); |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4083 | } |
| 4084 | } |
| 4085 | |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 4086 | static int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4087 | { |
Marcel Holtmann | 40be492 | 2008-07-14 20:13:50 +0200 | [diff] [blame] | 4088 | struct l2cap_conn *conn = hcon->l2cap_data; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4089 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4090 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4091 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4092 | return 0; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4093 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4094 | BT_DBG("conn %p", conn); |
| 4095 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 4096 | read_lock(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4097 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 4098 | list_for_each_entry(chan, &conn->chan_l, list) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4099 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 4100 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4101 | bh_lock_sock(sk); |
| 4102 | |
Vinicius Costa Gomes | f1cb9af | 2011-01-26 21:42:57 -0300 | [diff] [blame] | 4103 | BT_DBG("chan->scid %d", chan->scid); |
| 4104 | |
| 4105 | if (chan->scid == L2CAP_CID_LE_DATA) { |
| 4106 | if (!status && encrypt) { |
| 4107 | chan->sec_level = hcon->sec_level; |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 4108 | del_timer(&conn->security_timer); |
Vinicius Costa Gomes | f1cb9af | 2011-01-26 21:42:57 -0300 | [diff] [blame] | 4109 | l2cap_chan_ready(sk); |
Vinicius Costa Gomes | 7034b91 | 2011-07-07 18:59:34 -0300 | [diff] [blame] | 4110 | smp_distribute_keys(conn, 0); |
Vinicius Costa Gomes | f1cb9af | 2011-01-26 21:42:57 -0300 | [diff] [blame] | 4111 | } |
| 4112 | |
| 4113 | bh_unlock_sock(sk); |
| 4114 | continue; |
| 4115 | } |
| 4116 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 4117 | if (test_bit(CONF_CONNECT_PEND, &chan->conf_state)) { |
Marcel Holtmann | 6a8d301 | 2009-02-06 23:56:36 +0100 | [diff] [blame] | 4118 | bh_unlock_sock(sk); |
| 4119 | continue; |
| 4120 | } |
| 4121 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4122 | if (!status && (chan->state == BT_CONNECTED || |
| 4123 | chan->state == BT_CONFIG)) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4124 | l2cap_check_encryption(chan, encrypt); |
Marcel Holtmann | 9719f8a | 2008-07-14 20:13:45 +0200 | [diff] [blame] | 4125 | bh_unlock_sock(sk); |
| 4126 | continue; |
| 4127 | } |
| 4128 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4129 | if (chan->state == BT_CONNECT) { |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4130 | if (!status) { |
| 4131 | struct l2cap_conn_req req; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 4132 | req.scid = cpu_to_le16(chan->scid); |
| 4133 | req.psm = chan->psm; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4134 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 4135 | chan->ident = l2cap_get_ident(conn); |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 4136 | set_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4137 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 4138 | l2cap_send_cmd(conn, chan->ident, |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4139 | L2CAP_CONN_REQ, sizeof(req), &req); |
| 4140 | } else { |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 4141 | __clear_chan_timer(chan); |
| 4142 | __set_chan_timer(chan, HZ / 10); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4143 | } |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4144 | } else if (chan->state == BT_CONNECT2) { |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4145 | struct l2cap_conn_rsp rsp; |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4146 | __u16 res, stat; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4147 | |
| 4148 | if (!status) { |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4149 | if (bt_sk(sk)->defer_setup) { |
| 4150 | struct sock *parent = bt_sk(sk)->parent; |
| 4151 | res = L2CAP_CR_PEND; |
| 4152 | stat = L2CAP_CS_AUTHOR_PEND; |
Ilia Kolomisnky | 05e9a2f | 2011-07-15 18:30:21 +0000 | [diff] [blame] | 4153 | if (parent) |
| 4154 | parent->sk_data_ready(parent, 0); |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4155 | } else { |
Gustavo F. Padovan | 0555891 | 2011-06-21 14:52:56 -0300 | [diff] [blame] | 4156 | l2cap_state_change(chan, BT_CONFIG); |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4157 | res = L2CAP_CR_SUCCESS; |
| 4158 | stat = L2CAP_CS_NO_INFO; |
| 4159 | } |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4160 | } else { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4161 | l2cap_state_change(chan, BT_DISCONN); |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 4162 | __set_chan_timer(chan, HZ / 10); |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4163 | res = L2CAP_CR_SEC_BLOCK; |
| 4164 | stat = L2CAP_CS_NO_INFO; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4165 | } |
| 4166 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 4167 | rsp.scid = cpu_to_le16(chan->dcid); |
| 4168 | rsp.dcid = cpu_to_le16(chan->scid); |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4169 | rsp.result = cpu_to_le16(res); |
| 4170 | rsp.status = cpu_to_le16(stat); |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 4171 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, |
| 4172 | sizeof(rsp), &rsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4173 | } |
| 4174 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4175 | bh_unlock_sock(sk); |
| 4176 | } |
| 4177 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 4178 | read_unlock(&conn->chan_lock); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4179 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4180 | return 0; |
| 4181 | } |
| 4182 | |
| 4183 | static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) |
| 4184 | { |
| 4185 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 4186 | |
Andrei Emeltchenko | 5a08ecc | 2011-01-11 17:20:20 +0200 | [diff] [blame] | 4187 | if (!conn) |
| 4188 | conn = l2cap_conn_add(hcon, 0); |
| 4189 | |
| 4190 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4191 | goto drop; |
| 4192 | |
| 4193 | BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); |
| 4194 | |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 4195 | if (!(flags & ACL_CONT)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4196 | struct l2cap_hdr *hdr; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4197 | struct l2cap_chan *chan; |
Andrei Emeltchenko | 8979481 | 2010-09-15 14:28:44 +0300 | [diff] [blame] | 4198 | u16 cid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4199 | int len; |
| 4200 | |
| 4201 | if (conn->rx_len) { |
| 4202 | BT_ERR("Unexpected start frame (len %d)", skb->len); |
| 4203 | kfree_skb(conn->rx_skb); |
| 4204 | conn->rx_skb = NULL; |
| 4205 | conn->rx_len = 0; |
| 4206 | l2cap_conn_unreliable(conn, ECOMM); |
| 4207 | } |
| 4208 | |
Andrei Emeltchenko | aae7fe2 | 2010-09-15 14:28:43 +0300 | [diff] [blame] | 4209 | /* Start fragment always begin with Basic L2CAP header */ |
| 4210 | if (skb->len < L2CAP_HDR_SIZE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4211 | BT_ERR("Frame is too short (len %d)", skb->len); |
| 4212 | l2cap_conn_unreliable(conn, ECOMM); |
| 4213 | goto drop; |
| 4214 | } |
| 4215 | |
| 4216 | hdr = (struct l2cap_hdr *) skb->data; |
| 4217 | len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; |
Andrei Emeltchenko | 8979481 | 2010-09-15 14:28:44 +0300 | [diff] [blame] | 4218 | cid = __le16_to_cpu(hdr->cid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4219 | |
| 4220 | if (len == skb->len) { |
| 4221 | /* Complete frame received */ |
| 4222 | l2cap_recv_frame(conn, skb); |
| 4223 | return 0; |
| 4224 | } |
| 4225 | |
| 4226 | BT_DBG("Start: total len %d, frag len %d", len, skb->len); |
| 4227 | |
| 4228 | if (skb->len > len) { |
| 4229 | BT_ERR("Frame is too long (len %d, expected len %d)", |
| 4230 | skb->len, len); |
| 4231 | l2cap_conn_unreliable(conn, ECOMM); |
| 4232 | goto drop; |
| 4233 | } |
| 4234 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 4235 | chan = l2cap_get_chan_by_scid(conn, cid); |
Andrei Emeltchenko | 8979481 | 2010-09-15 14:28:44 +0300 | [diff] [blame] | 4236 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4237 | if (chan && chan->sk) { |
| 4238 | struct sock *sk = chan->sk; |
| 4239 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 4240 | if (chan->imtu < len - L2CAP_HDR_SIZE) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4241 | BT_ERR("Frame exceeding recv MTU (len %d, " |
| 4242 | "MTU %d)", len, |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 4243 | chan->imtu); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4244 | bh_unlock_sock(sk); |
| 4245 | l2cap_conn_unreliable(conn, ECOMM); |
| 4246 | goto drop; |
| 4247 | } |
Andrei Emeltchenko | 8979481 | 2010-09-15 14:28:44 +0300 | [diff] [blame] | 4248 | bh_unlock_sock(sk); |
Andrei Emeltchenko | 8979481 | 2010-09-15 14:28:44 +0300 | [diff] [blame] | 4249 | } |
| 4250 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4251 | /* Allocate skb for the complete frame (with header) */ |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 4252 | conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC); |
| 4253 | if (!conn->rx_skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4254 | goto drop; |
| 4255 | |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 4256 | 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] | 4257 | skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4258 | conn->rx_len = len - skb->len; |
| 4259 | } else { |
| 4260 | BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); |
| 4261 | |
| 4262 | if (!conn->rx_len) { |
| 4263 | BT_ERR("Unexpected continuation frame (len %d)", skb->len); |
| 4264 | l2cap_conn_unreliable(conn, ECOMM); |
| 4265 | goto drop; |
| 4266 | } |
| 4267 | |
| 4268 | if (skb->len > conn->rx_len) { |
| 4269 | BT_ERR("Fragment is too long (len %d, expected %d)", |
| 4270 | skb->len, conn->rx_len); |
| 4271 | kfree_skb(conn->rx_skb); |
| 4272 | conn->rx_skb = NULL; |
| 4273 | conn->rx_len = 0; |
| 4274 | l2cap_conn_unreliable(conn, ECOMM); |
| 4275 | goto drop; |
| 4276 | } |
| 4277 | |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 4278 | 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] | 4279 | skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4280 | conn->rx_len -= skb->len; |
| 4281 | |
| 4282 | if (!conn->rx_len) { |
| 4283 | /* Complete frame received */ |
| 4284 | l2cap_recv_frame(conn, conn->rx_skb); |
| 4285 | conn->rx_skb = NULL; |
| 4286 | } |
| 4287 | } |
| 4288 | |
| 4289 | drop: |
| 4290 | kfree_skb(skb); |
| 4291 | return 0; |
| 4292 | } |
| 4293 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4294 | static int l2cap_debugfs_show(struct seq_file *f, void *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4295 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4296 | struct l2cap_chan *c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4297 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4298 | read_lock_bh(&chan_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4299 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4300 | list_for_each_entry(c, &chan_list, global_l) { |
| 4301 | struct sock *sk = c->sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4302 | |
Gustavo F. Padovan | 903d343 | 2011-02-10 14:16:06 -0200 | [diff] [blame] | 4303 | 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] | 4304 | batostr(&bt_sk(sk)->src), |
| 4305 | batostr(&bt_sk(sk)->dst), |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4306 | c->state, __le16_to_cpu(c->psm), |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4307 | c->scid, c->dcid, c->imtu, c->omtu, |
| 4308 | c->sec_level, c->mode); |
Gustavo F. Padovan | 0555891 | 2011-06-21 14:52:56 -0300 | [diff] [blame] | 4309 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4310 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4311 | read_unlock_bh(&chan_list_lock); |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 4312 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4313 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4314 | } |
| 4315 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4316 | static int l2cap_debugfs_open(struct inode *inode, struct file *file) |
| 4317 | { |
| 4318 | return single_open(file, l2cap_debugfs_show, inode->i_private); |
| 4319 | } |
| 4320 | |
| 4321 | static const struct file_operations l2cap_debugfs_fops = { |
| 4322 | .open = l2cap_debugfs_open, |
| 4323 | .read = seq_read, |
| 4324 | .llseek = seq_lseek, |
| 4325 | .release = single_release, |
| 4326 | }; |
| 4327 | |
| 4328 | static struct dentry *l2cap_debugfs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4329 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4330 | static struct hci_proto l2cap_hci_proto = { |
| 4331 | .name = "L2CAP", |
| 4332 | .id = HCI_PROTO_L2CAP, |
| 4333 | .connect_ind = l2cap_connect_ind, |
| 4334 | .connect_cfm = l2cap_connect_cfm, |
| 4335 | .disconn_ind = l2cap_disconn_ind, |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 4336 | .disconn_cfm = l2cap_disconn_cfm, |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 4337 | .security_cfm = l2cap_security_cfm, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4338 | .recv_acldata = l2cap_recv_acldata |
| 4339 | }; |
| 4340 | |
Gustavo F. Padovan | 6427451 | 2011-02-07 20:08:52 -0200 | [diff] [blame] | 4341 | int __init l2cap_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4342 | { |
| 4343 | int err; |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 4344 | |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 4345 | err = l2cap_init_sockets(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4346 | if (err < 0) |
| 4347 | return err; |
| 4348 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4349 | err = hci_register_proto(&l2cap_hci_proto); |
| 4350 | if (err < 0) { |
| 4351 | BT_ERR("L2CAP protocol registration failed"); |
| 4352 | bt_sock_unregister(BTPROTO_L2CAP); |
| 4353 | goto error; |
| 4354 | } |
| 4355 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4356 | if (bt_debugfs) { |
| 4357 | l2cap_debugfs = debugfs_create_file("l2cap", 0444, |
| 4358 | bt_debugfs, NULL, &l2cap_debugfs_fops); |
| 4359 | if (!l2cap_debugfs) |
| 4360 | BT_ERR("Failed to create L2CAP debug file"); |
| 4361 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4362 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4363 | return 0; |
| 4364 | |
| 4365 | error: |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 4366 | l2cap_cleanup_sockets(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4367 | return err; |
| 4368 | } |
| 4369 | |
Gustavo F. Padovan | 6427451 | 2011-02-07 20:08:52 -0200 | [diff] [blame] | 4370 | void l2cap_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4371 | { |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4372 | debugfs_remove(l2cap_debugfs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4373 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4374 | if (hci_unregister_proto(&l2cap_hci_proto) < 0) |
| 4375 | BT_ERR("L2CAP protocol unregistration failed"); |
| 4376 | |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 4377 | l2cap_cleanup_sockets(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4378 | } |
| 4379 | |
Gustavo F. Padovan | d1c4a17 | 2010-07-18 16:25:54 -0300 | [diff] [blame] | 4380 | module_param(disable_ertm, bool, 0644); |
| 4381 | MODULE_PARM_DESC(disable_ertm, "Disable enhanced retransmission mode"); |