YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | BlueZ - Bluetooth protocol stack for Linux |
| 3 | Copyright (C) 2000-2001 Qualcomm Incorporated |
Gustavo F. Padovan | ce5706b | 2010-07-13 11:57:11 -0300 | [diff] [blame] | 4 | Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org> |
Gustavo F. Padovan | 5d8868f | 2010-07-16 16:18:39 -0300 | [diff] [blame] | 5 | Copyright (C) 2010 Google Inc. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | |
| 7 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License version 2 as |
| 11 | published by the Free Software Foundation; |
| 12 | |
| 13 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| 14 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 15 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. |
| 16 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 17 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
| 18 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 19 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 21 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 22 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
| 23 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | SOFTWARE IS DISCLAIMED. |
| 25 | */ |
| 26 | |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 27 | /* Bluetooth L2CAP core. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/module.h> |
| 30 | |
| 31 | #include <linux/types.h> |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 32 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/errno.h> |
| 34 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <linux/sched.h> |
| 36 | #include <linux/slab.h> |
| 37 | #include <linux/poll.h> |
| 38 | #include <linux/fcntl.h> |
| 39 | #include <linux/init.h> |
| 40 | #include <linux/interrupt.h> |
| 41 | #include <linux/socket.h> |
| 42 | #include <linux/skbuff.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include <linux/list.h> |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 44 | #include <linux/device.h> |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 45 | #include <linux/debugfs.h> |
| 46 | #include <linux/seq_file.h> |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 47 | #include <linux/uaccess.h> |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 48 | #include <linux/crc16.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | #include <net/sock.h> |
| 50 | |
| 51 | #include <asm/system.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | #include <asm/unaligned.h> |
| 53 | |
| 54 | #include <net/bluetooth/bluetooth.h> |
| 55 | #include <net/bluetooth/hci_core.h> |
| 56 | #include <net/bluetooth/l2cap.h> |
Anderson Briglia | b501d6a | 2011-06-07 18:46:31 -0300 | [diff] [blame] | 57 | #include <net/bluetooth/smp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 59 | int disable_ertm; |
Andrei Emeltchenko | a5fd6f3 | 2011-09-16 16:26:32 +0300 | [diff] [blame] | 60 | int enable_hs; |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 61 | |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 62 | static u32 l2cap_feat_mask = L2CAP_FEAT_FIXED_CHAN; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 63 | static u8 l2cap_fixed_chan[8] = { 0x02, }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | |
Johannes Berg | b5ad8b7 | 2011-06-01 08:54:45 +0200 | [diff] [blame] | 65 | static LIST_HEAD(chan_list); |
| 66 | static DEFINE_RWLOCK(chan_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, |
| 69 | u8 code, u8 ident, u16 dlen, void *data); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 70 | static void l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, |
| 71 | void *data); |
Gustavo F. Padovan | 710f9b0a | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 72 | static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 73 | static void l2cap_send_disconn_req(struct l2cap_conn *conn, |
| 74 | struct l2cap_chan *chan, int err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 76 | static int l2cap_ertm_data_rcv(struct sock *sk, struct sk_buff *skb); |
| 77 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 78 | /* ---- L2CAP channels ---- */ |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 79 | |
| 80 | static inline void chan_hold(struct l2cap_chan *c) |
| 81 | { |
| 82 | atomic_inc(&c->refcnt); |
| 83 | } |
| 84 | |
| 85 | static inline void chan_put(struct l2cap_chan *c) |
| 86 | { |
| 87 | if (atomic_dec_and_test(&c->refcnt)) |
| 88 | kfree(c); |
| 89 | } |
| 90 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 91 | static struct l2cap_chan *__l2cap_get_chan_by_dcid(struct l2cap_conn *conn, u16 cid) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 92 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 93 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 94 | |
| 95 | list_for_each_entry(c, &conn->chan_l, list) { |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 96 | if (c->dcid == cid) |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 97 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 98 | } |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 99 | return NULL; |
| 100 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 101 | } |
| 102 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 103 | static struct l2cap_chan *__l2cap_get_chan_by_scid(struct l2cap_conn *conn, u16 cid) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 104 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 105 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 106 | |
| 107 | list_for_each_entry(c, &conn->chan_l, list) { |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 108 | if (c->scid == cid) |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 109 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 110 | } |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 111 | return NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 112 | } |
| 113 | |
| 114 | /* Find channel with given SCID. |
| 115 | * Returns locked socket */ |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 116 | static struct l2cap_chan *l2cap_get_chan_by_scid(struct l2cap_conn *conn, u16 cid) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 117 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 118 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 119 | |
| 120 | read_lock(&conn->chan_lock); |
| 121 | c = __l2cap_get_chan_by_scid(conn, cid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 122 | if (c) |
| 123 | bh_lock_sock(c->sk); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 124 | read_unlock(&conn->chan_lock); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 125 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 126 | } |
| 127 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 128 | static struct l2cap_chan *__l2cap_get_chan_by_ident(struct l2cap_conn *conn, u8 ident) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 129 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 130 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 131 | |
| 132 | list_for_each_entry(c, &conn->chan_l, list) { |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 133 | if (c->ident == ident) |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 134 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 135 | } |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 136 | return NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 137 | } |
| 138 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 139 | static inline struct l2cap_chan *l2cap_get_chan_by_ident(struct l2cap_conn *conn, u8 ident) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 140 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 141 | struct l2cap_chan *c; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 142 | |
| 143 | read_lock(&conn->chan_lock); |
| 144 | c = __l2cap_get_chan_by_ident(conn, ident); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 145 | if (c) |
| 146 | bh_lock_sock(c->sk); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 147 | read_unlock(&conn->chan_lock); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 148 | return c; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 149 | } |
| 150 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 151 | static struct l2cap_chan *__l2cap_global_chan_by_addr(__le16 psm, bdaddr_t *src) |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 152 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 153 | struct l2cap_chan *c; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 154 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 155 | list_for_each_entry(c, &chan_list, global_l) { |
| 156 | if (c->sport == psm && !bacmp(&bt_sk(c->sk)->src, src)) |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 157 | goto found; |
| 158 | } |
| 159 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 160 | c = NULL; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 161 | found: |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 162 | return c; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 163 | } |
| 164 | |
| 165 | int l2cap_add_psm(struct l2cap_chan *chan, bdaddr_t *src, __le16 psm) |
| 166 | { |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 167 | int err; |
| 168 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 169 | write_lock_bh(&chan_list_lock); |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 170 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 171 | if (psm && __l2cap_global_chan_by_addr(psm, src)) { |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 172 | err = -EADDRINUSE; |
| 173 | goto done; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 174 | } |
| 175 | |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 176 | if (psm) { |
| 177 | chan->psm = psm; |
| 178 | chan->sport = psm; |
| 179 | err = 0; |
| 180 | } else { |
| 181 | u16 p; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 182 | |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 183 | err = -EINVAL; |
| 184 | for (p = 0x1001; p < 0x1100; p += 2) |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 185 | if (!__l2cap_global_chan_by_addr(cpu_to_le16(p), src)) { |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 186 | chan->psm = cpu_to_le16(p); |
| 187 | chan->sport = cpu_to_le16(p); |
| 188 | err = 0; |
| 189 | break; |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | done: |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 194 | write_unlock_bh(&chan_list_lock); |
Gustavo F. Padovan | 73b2ec1 | 2011-04-18 19:36:44 -0300 | [diff] [blame] | 195 | return err; |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 196 | } |
| 197 | |
| 198 | int l2cap_add_scid(struct l2cap_chan *chan, __u16 scid) |
| 199 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 200 | write_lock_bh(&chan_list_lock); |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 201 | |
| 202 | chan->scid = scid; |
| 203 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 204 | write_unlock_bh(&chan_list_lock); |
Gustavo F. Padovan | 9e4425f | 2011-04-18 18:38:43 -0300 | [diff] [blame] | 205 | |
| 206 | return 0; |
| 207 | } |
| 208 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 209 | static u16 l2cap_alloc_cid(struct l2cap_conn *conn) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 210 | { |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 211 | u16 cid = L2CAP_CID_DYN_START; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 212 | |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 213 | for (; cid < L2CAP_CID_DYN_END; cid++) { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 214 | if (!__l2cap_get_chan_by_scid(conn, cid)) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 215 | return cid; |
| 216 | } |
| 217 | |
| 218 | return 0; |
| 219 | } |
| 220 | |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 221 | static void l2cap_set_timer(struct l2cap_chan *chan, struct timer_list *timer, long timeout) |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 222 | { |
Mat Martineau | 774e565 | 2011-06-29 14:35:20 -0700 | [diff] [blame] | 223 | 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] | 224 | |
Mat Martineau | 942ecc9 | 2011-06-29 14:35:21 -0700 | [diff] [blame] | 225 | if (!mod_timer(timer, jiffies + msecs_to_jiffies(timeout))) |
Mat Martineau | 774e565 | 2011-06-29 14:35:20 -0700 | [diff] [blame] | 226 | chan_hold(chan); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 227 | } |
| 228 | |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 229 | static void l2cap_clear_timer(struct l2cap_chan *chan, struct timer_list *timer) |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 230 | { |
Mat Martineau | 774e565 | 2011-06-29 14:35:20 -0700 | [diff] [blame] | 231 | BT_DBG("chan %p state %d", chan, chan->state); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 232 | |
Mat Martineau | 774e565 | 2011-06-29 14:35:20 -0700 | [diff] [blame] | 233 | if (timer_pending(timer) && del_timer(timer)) |
| 234 | chan_put(chan); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 235 | } |
| 236 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 237 | static void l2cap_state_change(struct l2cap_chan *chan, int state) |
| 238 | { |
| 239 | chan->state = state; |
| 240 | chan->ops->state_change(chan->data, state); |
| 241 | } |
| 242 | |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 243 | static void l2cap_chan_timeout(unsigned long arg) |
| 244 | { |
| 245 | struct l2cap_chan *chan = (struct l2cap_chan *) arg; |
| 246 | struct sock *sk = chan->sk; |
| 247 | int reason; |
| 248 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 249 | BT_DBG("chan %p state %d", chan, chan->state); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 250 | |
| 251 | bh_lock_sock(sk); |
| 252 | |
| 253 | if (sock_owned_by_user(sk)) { |
| 254 | /* sk is owned by user. Try again later */ |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 255 | __set_chan_timer(chan, HZ / 5); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 256 | bh_unlock_sock(sk); |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 257 | chan_put(chan); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 258 | return; |
| 259 | } |
| 260 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 261 | if (chan->state == BT_CONNECTED || chan->state == BT_CONFIG) |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 262 | reason = ECONNREFUSED; |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 263 | else if (chan->state == BT_CONNECT && |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 264 | chan->sec_level != BT_SECURITY_SDP) |
| 265 | reason = ECONNREFUSED; |
| 266 | else |
| 267 | reason = ETIMEDOUT; |
| 268 | |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 269 | l2cap_chan_close(chan, reason); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 270 | |
| 271 | bh_unlock_sock(sk); |
| 272 | |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 273 | chan->ops->close(chan->data); |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 274 | chan_put(chan); |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 275 | } |
| 276 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 277 | struct l2cap_chan *l2cap_chan_create(struct sock *sk) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 278 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 279 | struct l2cap_chan *chan; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 280 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 281 | chan = kzalloc(sizeof(*chan), GFP_ATOMIC); |
| 282 | if (!chan) |
| 283 | return NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 284 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 285 | chan->sk = sk; |
| 286 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 287 | write_lock_bh(&chan_list_lock); |
| 288 | list_add(&chan->global_l, &chan_list); |
| 289 | write_unlock_bh(&chan_list_lock); |
| 290 | |
Gustavo F. Padovan | ab07801 | 2011-05-02 18:25:01 -0300 | [diff] [blame] | 291 | setup_timer(&chan->chan_timer, l2cap_chan_timeout, (unsigned long) chan); |
| 292 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 293 | chan->state = BT_OPEN; |
| 294 | |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 295 | atomic_set(&chan->refcnt, 1); |
| 296 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 297 | return chan; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 298 | } |
| 299 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 300 | void l2cap_chan_destroy(struct l2cap_chan *chan) |
Gustavo F. Padovan | 6ff5abb | 2011-04-25 15:10:41 -0300 | [diff] [blame] | 301 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 302 | write_lock_bh(&chan_list_lock); |
| 303 | list_del(&chan->global_l); |
| 304 | write_unlock_bh(&chan_list_lock); |
| 305 | |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 306 | chan_put(chan); |
Gustavo F. Padovan | 6ff5abb | 2011-04-25 15:10:41 -0300 | [diff] [blame] | 307 | } |
| 308 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 309 | static void __l2cap_chan_add(struct l2cap_conn *conn, struct l2cap_chan *chan) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 310 | { |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 311 | BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 312 | chan->psm, chan->dcid); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 313 | |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 314 | conn->disc_reason = 0x13; |
| 315 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 316 | chan->conn = conn; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 317 | |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 318 | if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED) { |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 319 | if (conn->hcon->type == LE_LINK) { |
| 320 | /* LE connection */ |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 321 | chan->omtu = L2CAP_LE_DEFAULT_MTU; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 322 | chan->scid = L2CAP_CID_LE_DATA; |
| 323 | chan->dcid = L2CAP_CID_LE_DATA; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 324 | } else { |
| 325 | /* Alloc CID for connection-oriented socket */ |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 326 | chan->scid = l2cap_alloc_cid(conn); |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 327 | chan->omtu = L2CAP_DEFAULT_MTU; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 328 | } |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 329 | } else if (chan->chan_type == L2CAP_CHAN_CONN_LESS) { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 330 | /* Connectionless socket */ |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 331 | chan->scid = L2CAP_CID_CONN_LESS; |
| 332 | chan->dcid = L2CAP_CID_CONN_LESS; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 333 | chan->omtu = L2CAP_DEFAULT_MTU; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 334 | } else { |
| 335 | /* Raw socket can send/recv signalling messages only */ |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 336 | chan->scid = L2CAP_CID_SIGNALING; |
| 337 | chan->dcid = L2CAP_CID_SIGNALING; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 338 | chan->omtu = L2CAP_DEFAULT_MTU; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 339 | } |
| 340 | |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 341 | chan_hold(chan); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 342 | |
| 343 | list_add(&chan->list, &conn->chan_l); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 344 | } |
| 345 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 346 | /* Delete channel. |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 347 | * Must be called on the locked socket. */ |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 348 | static void l2cap_chan_del(struct l2cap_chan *chan, int err) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 349 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 350 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 351 | struct l2cap_conn *conn = chan->conn; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 352 | struct sock *parent = bt_sk(sk)->parent; |
| 353 | |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 354 | __clear_chan_timer(chan); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 355 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 356 | BT_DBG("chan %p, conn %p, err %d", chan, conn, err); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 357 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 358 | if (conn) { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 359 | /* Delete from channel list */ |
| 360 | write_lock_bh(&conn->chan_lock); |
| 361 | list_del(&chan->list); |
| 362 | write_unlock_bh(&conn->chan_lock); |
Gustavo F. Padovan | 71ba0e5 | 2011-05-17 14:34:52 -0300 | [diff] [blame] | 363 | chan_put(chan); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 364 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 365 | chan->conn = NULL; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 366 | hci_conn_put(conn->hcon); |
| 367 | } |
| 368 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 369 | l2cap_state_change(chan, BT_CLOSED); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 370 | sock_set_flag(sk, SOCK_ZAPPED); |
| 371 | |
| 372 | if (err) |
| 373 | sk->sk_err = err; |
| 374 | |
| 375 | if (parent) { |
| 376 | bt_accept_unlink(sk); |
| 377 | parent->sk_data_ready(parent, 0); |
| 378 | } else |
| 379 | sk->sk_state_change(sk); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 380 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 381 | if (!(test_bit(CONF_OUTPUT_DONE, &chan->conf_state) && |
| 382 | test_bit(CONF_INPUT_DONE, &chan->conf_state))) |
Gustavo F. Padovan | 6ff5abb | 2011-04-25 15:10:41 -0300 | [diff] [blame] | 383 | return; |
Gustavo F. Padovan | 2ead70b | 2011-04-01 15:13:36 -0300 | [diff] [blame] | 384 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 385 | skb_queue_purge(&chan->tx_q); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 386 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 387 | if (chan->mode == L2CAP_MODE_ERTM) { |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 388 | struct srej_list *l, *tmp; |
| 389 | |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 390 | __clear_retrans_timer(chan); |
| 391 | __clear_monitor_timer(chan); |
| 392 | __clear_ack_timer(chan); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 393 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 394 | skb_queue_purge(&chan->srej_q); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 395 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 396 | list_for_each_entry_safe(l, tmp, &chan->srej_l, list) { |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 397 | list_del(&l->list); |
| 398 | kfree(l); |
| 399 | } |
| 400 | } |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 401 | } |
| 402 | |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 403 | static void l2cap_chan_cleanup_listen(struct sock *parent) |
| 404 | { |
| 405 | struct sock *sk; |
| 406 | |
| 407 | BT_DBG("parent %p", parent); |
| 408 | |
| 409 | /* Close not yet accepted channels */ |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 410 | while ((sk = bt_accept_dequeue(parent, NULL))) { |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 411 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 412 | __clear_chan_timer(chan); |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 413 | lock_sock(sk); |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 414 | l2cap_chan_close(chan, ECONNRESET); |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 415 | release_sock(sk); |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 416 | chan->ops->close(chan->data); |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 417 | } |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 418 | } |
| 419 | |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 420 | void l2cap_chan_close(struct l2cap_chan *chan, int reason) |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 421 | { |
| 422 | struct l2cap_conn *conn = chan->conn; |
| 423 | struct sock *sk = chan->sk; |
| 424 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 425 | 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] | 426 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 427 | switch (chan->state) { |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 428 | case BT_LISTEN: |
| 429 | l2cap_chan_cleanup_listen(sk); |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 430 | |
| 431 | l2cap_state_change(chan, BT_CLOSED); |
| 432 | sock_set_flag(sk, SOCK_ZAPPED); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 433 | break; |
| 434 | |
| 435 | case BT_CONNECTED: |
| 436 | case BT_CONFIG: |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 437 | if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 438 | conn->hcon->type == ACL_LINK) { |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 439 | __clear_chan_timer(chan); |
| 440 | __set_chan_timer(chan, sk->sk_sndtimeo); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 441 | l2cap_send_disconn_req(conn, chan, reason); |
| 442 | } else |
| 443 | l2cap_chan_del(chan, reason); |
| 444 | break; |
| 445 | |
| 446 | case BT_CONNECT2: |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 447 | if (chan->chan_type == L2CAP_CHAN_CONN_ORIENTED && |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 448 | conn->hcon->type == ACL_LINK) { |
| 449 | struct l2cap_conn_rsp rsp; |
| 450 | __u16 result; |
| 451 | |
| 452 | if (bt_sk(sk)->defer_setup) |
| 453 | result = L2CAP_CR_SEC_BLOCK; |
| 454 | else |
| 455 | result = L2CAP_CR_BAD_PSM; |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 456 | l2cap_state_change(chan, BT_DISCONN); |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 457 | |
| 458 | rsp.scid = cpu_to_le16(chan->dcid); |
| 459 | rsp.dcid = cpu_to_le16(chan->scid); |
| 460 | rsp.result = cpu_to_le16(result); |
| 461 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 462 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, |
| 463 | sizeof(rsp), &rsp); |
| 464 | } |
| 465 | |
| 466 | l2cap_chan_del(chan, reason); |
| 467 | break; |
| 468 | |
| 469 | case BT_CONNECT: |
| 470 | case BT_DISCONN: |
| 471 | l2cap_chan_del(chan, reason); |
| 472 | break; |
| 473 | |
| 474 | default: |
| 475 | sock_set_flag(sk, SOCK_ZAPPED); |
| 476 | break; |
| 477 | } |
| 478 | } |
| 479 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 480 | static inline u8 l2cap_get_auth_type(struct l2cap_chan *chan) |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 481 | { |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 482 | if (chan->chan_type == L2CAP_CHAN_RAW) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 483 | switch (chan->sec_level) { |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 484 | case BT_SECURITY_HIGH: |
| 485 | return HCI_AT_DEDICATED_BONDING_MITM; |
| 486 | case BT_SECURITY_MEDIUM: |
| 487 | return HCI_AT_DEDICATED_BONDING; |
| 488 | default: |
| 489 | return HCI_AT_NO_BONDING; |
| 490 | } |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 491 | } else if (chan->psm == cpu_to_le16(0x0001)) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 492 | if (chan->sec_level == BT_SECURITY_LOW) |
| 493 | chan->sec_level = BT_SECURITY_SDP; |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 494 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 495 | if (chan->sec_level == BT_SECURITY_HIGH) |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 496 | return HCI_AT_NO_BONDING_MITM; |
| 497 | else |
| 498 | return HCI_AT_NO_BONDING; |
| 499 | } else { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 500 | switch (chan->sec_level) { |
Johan Hedberg | 8556edd3 | 2011-01-19 12:06:50 +0530 | [diff] [blame] | 501 | case BT_SECURITY_HIGH: |
| 502 | return HCI_AT_GENERAL_BONDING_MITM; |
| 503 | case BT_SECURITY_MEDIUM: |
| 504 | return HCI_AT_GENERAL_BONDING; |
| 505 | default: |
| 506 | return HCI_AT_NO_BONDING; |
| 507 | } |
| 508 | } |
| 509 | } |
| 510 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 511 | /* Service level security */ |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 512 | static inline int l2cap_check_security(struct l2cap_chan *chan) |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 513 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 514 | struct l2cap_conn *conn = chan->conn; |
Marcel Holtmann | 0684e5f | 2009-02-09 02:48:38 +0100 | [diff] [blame] | 515 | __u8 auth_type; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 516 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 517 | auth_type = l2cap_get_auth_type(chan); |
Marcel Holtmann | 0684e5f | 2009-02-09 02:48:38 +0100 | [diff] [blame] | 518 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 519 | return hci_conn_security(conn->hcon, chan->sec_level, auth_type); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 520 | } |
| 521 | |
Johannes Berg | b5ad8b7 | 2011-06-01 08:54:45 +0200 | [diff] [blame] | 522 | static u8 l2cap_get_ident(struct l2cap_conn *conn) |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 523 | { |
| 524 | u8 id; |
| 525 | |
| 526 | /* Get next available identificator. |
| 527 | * 1 - 128 are used by kernel. |
| 528 | * 129 - 199 are reserved. |
| 529 | * 200 - 254 are used by utilities like l2ping, etc. |
| 530 | */ |
| 531 | |
| 532 | spin_lock_bh(&conn->lock); |
| 533 | |
| 534 | if (++conn->tx_ident > 128) |
| 535 | conn->tx_ident = 1; |
| 536 | |
| 537 | id = conn->tx_ident; |
| 538 | |
| 539 | spin_unlock_bh(&conn->lock); |
| 540 | |
| 541 | return id; |
| 542 | } |
| 543 | |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 544 | 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] | 545 | { |
| 546 | struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 547 | u8 flags; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 548 | |
| 549 | BT_DBG("code 0x%2.2x", code); |
| 550 | |
| 551 | if (!skb) |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 552 | return; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 553 | |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 554 | if (lmp_no_flush_capable(conn->hcon->hdev)) |
| 555 | flags = ACL_START_NO_FLUSH; |
| 556 | else |
| 557 | flags = ACL_START; |
| 558 | |
Jaikumar Ganesh | 14b12d0 | 2011-05-23 18:06:04 -0700 | [diff] [blame] | 559 | bt_cb(skb)->force_active = BT_POWER_FORCE_ACTIVE_ON; |
| 560 | |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 561 | hci_send_acl(conn->hcon, skb, flags); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 562 | } |
| 563 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 564 | 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] | 565 | { |
| 566 | struct sk_buff *skb; |
| 567 | struct l2cap_hdr *lh; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 568 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 569 | int count, hlen = L2CAP_HDR_SIZE + 2; |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 570 | u8 flags; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 571 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 572 | if (chan->state != BT_CONNECTED) |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 573 | return; |
| 574 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 575 | if (chan->fcs == L2CAP_FCS_CRC16) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 576 | hlen += 2; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 577 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 578 | BT_DBG("chan %p, control 0x%2.2x", chan, control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 579 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 580 | count = min_t(unsigned int, conn->mtu, hlen); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 581 | control |= L2CAP_CTRL_FRAME_TYPE; |
| 582 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 583 | if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state)) |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 584 | control |= L2CAP_CTRL_FINAL; |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 585 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 586 | if (test_and_clear_bit(CONN_SEND_PBIT, &chan->conn_state)) |
Gustavo F. Padovan | f0946cc | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 587 | control |= L2CAP_CTRL_POLL; |
Gustavo F. Padovan | f0946cc | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 588 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 589 | skb = bt_skb_alloc(count, GFP_ATOMIC); |
| 590 | if (!skb) |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 591 | return; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 592 | |
| 593 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 594 | lh->len = cpu_to_le16(hlen - L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 595 | lh->cid = cpu_to_le16(chan->dcid); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 596 | put_unaligned_le16(control, skb_put(skb, 2)); |
| 597 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 598 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 599 | u16 fcs = crc16(0, (u8 *)lh, count - 2); |
| 600 | put_unaligned_le16(fcs, skb_put(skb, 2)); |
| 601 | } |
| 602 | |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 603 | if (lmp_no_flush_capable(conn->hcon->hdev)) |
| 604 | flags = ACL_START_NO_FLUSH; |
| 605 | else |
| 606 | flags = ACL_START; |
| 607 | |
Andrei Emeltchenko | 15770b1 | 2011-10-11 14:04:33 +0300 | [diff] [blame] | 608 | bt_cb(skb)->force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags); |
Jaikumar Ganesh | 14b12d0 | 2011-05-23 18:06:04 -0700 | [diff] [blame] | 609 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 610 | hci_send_acl(chan->conn->hcon, skb, flags); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 611 | } |
| 612 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 613 | 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] | 614 | { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 615 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 616 | control |= L2CAP_SUPER_RCV_NOT_READY; |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 617 | set_bit(CONN_RNR_SENT, &chan->conn_state); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 618 | } else |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 619 | control |= L2CAP_SUPER_RCV_READY; |
| 620 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 621 | control |= chan->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
Gustavo F. Padovan | 2ab25cd | 2009-10-03 02:34:40 -0300 | [diff] [blame] | 622 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 623 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 624 | } |
| 625 | |
Gustavo F. Padovan | b445003 | 2011-04-12 18:15:09 -0300 | [diff] [blame] | 626 | static inline int __l2cap_no_conn_pending(struct l2cap_chan *chan) |
Andrei Emeltchenko | e501d05 | 2010-07-08 12:14:41 +0300 | [diff] [blame] | 627 | { |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 628 | return !test_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Andrei Emeltchenko | e501d05 | 2010-07-08 12:14:41 +0300 | [diff] [blame] | 629 | } |
| 630 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 631 | static void l2cap_do_start(struct l2cap_chan *chan) |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 632 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 633 | struct l2cap_conn *conn = chan->conn; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 634 | |
| 635 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) { |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 636 | if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)) |
| 637 | return; |
| 638 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 639 | if (l2cap_check_security(chan) && |
| 640 | __l2cap_no_conn_pending(chan)) { |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 641 | struct l2cap_conn_req req; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 642 | req.scid = cpu_to_le16(chan->scid); |
| 643 | req.psm = chan->psm; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 644 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 645 | chan->ident = l2cap_get_ident(conn); |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 646 | set_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 647 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 648 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_REQ, |
| 649 | sizeof(req), &req); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 650 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 651 | } else { |
| 652 | struct l2cap_info_req req; |
| 653 | req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 654 | |
| 655 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; |
| 656 | conn->info_ident = l2cap_get_ident(conn); |
| 657 | |
| 658 | mod_timer(&conn->info_timer, jiffies + |
| 659 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); |
| 660 | |
| 661 | l2cap_send_cmd(conn, conn->info_ident, |
| 662 | L2CAP_INFO_REQ, sizeof(req), &req); |
| 663 | } |
| 664 | } |
| 665 | |
Gustavo F. Padovan | cf6c2c0 | 2010-06-07 20:54:45 -0300 | [diff] [blame] | 666 | static inline int l2cap_mode_supported(__u8 mode, __u32 feat_mask) |
| 667 | { |
| 668 | u32 local_feat_mask = l2cap_feat_mask; |
Gustavo F. Padovan | d1c4a17 | 2010-07-18 16:25:54 -0300 | [diff] [blame] | 669 | if (!disable_ertm) |
Gustavo F. Padovan | cf6c2c0 | 2010-06-07 20:54:45 -0300 | [diff] [blame] | 670 | local_feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING; |
| 671 | |
| 672 | switch (mode) { |
| 673 | case L2CAP_MODE_ERTM: |
| 674 | return L2CAP_FEAT_ERTM & feat_mask & local_feat_mask; |
| 675 | case L2CAP_MODE_STREAMING: |
| 676 | return L2CAP_FEAT_STREAMING & feat_mask & local_feat_mask; |
| 677 | default: |
| 678 | return 0x00; |
| 679 | } |
| 680 | } |
| 681 | |
Gustavo F. Padovan | 4519de9 | 2011-04-28 17:55:53 -0300 | [diff] [blame] | 682 | 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] | 683 | { |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 684 | struct sock *sk; |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 685 | struct l2cap_disconn_req req; |
| 686 | |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 687 | if (!conn) |
| 688 | return; |
| 689 | |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 690 | sk = chan->sk; |
| 691 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 692 | if (chan->mode == L2CAP_MODE_ERTM) { |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 693 | __clear_retrans_timer(chan); |
| 694 | __clear_monitor_timer(chan); |
| 695 | __clear_ack_timer(chan); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 696 | } |
| 697 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 698 | req.dcid = cpu_to_le16(chan->dcid); |
| 699 | req.scid = cpu_to_le16(chan->scid); |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 700 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
| 701 | L2CAP_DISCONN_REQ, sizeof(req), &req); |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 702 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 703 | l2cap_state_change(chan, BT_DISCONN); |
Gustavo F. Padovan | 9b108fc | 2010-05-20 16:21:53 -0300 | [diff] [blame] | 704 | sk->sk_err = err; |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 705 | } |
| 706 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | /* ---- L2CAP connections ---- */ |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 708 | static void l2cap_conn_start(struct l2cap_conn *conn) |
| 709 | { |
Gustavo F. Padovan | 820ffdb | 2011-04-01 00:35:21 -0300 | [diff] [blame] | 710 | struct l2cap_chan *chan, *tmp; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 711 | |
| 712 | BT_DBG("conn %p", conn); |
| 713 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 714 | read_lock(&conn->chan_lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 715 | |
Gustavo F. Padovan | 820ffdb | 2011-04-01 00:35:21 -0300 | [diff] [blame] | 716 | list_for_each_entry_safe(chan, tmp, &conn->chan_l, list) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 717 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 718 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 719 | bh_lock_sock(sk); |
| 720 | |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 721 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 722 | bh_unlock_sock(sk); |
| 723 | continue; |
| 724 | } |
| 725 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 726 | if (chan->state == BT_CONNECT) { |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 727 | struct l2cap_conn_req req; |
Gustavo F. Padovan | cf6c2c0 | 2010-06-07 20:54:45 -0300 | [diff] [blame] | 728 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 729 | if (!l2cap_check_security(chan) || |
Gustavo F. Padovan | b445003 | 2011-04-12 18:15:09 -0300 | [diff] [blame] | 730 | !__l2cap_no_conn_pending(chan)) { |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 731 | bh_unlock_sock(sk); |
| 732 | continue; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 733 | } |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 734 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 735 | if (!l2cap_mode_supported(chan->mode, conn->feat_mask) |
| 736 | && test_bit(CONF_STATE2_DEVICE, |
| 737 | &chan->conf_state)) { |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 738 | /* l2cap_chan_close() calls list_del(chan) |
Gustavo F. Padovan | 820ffdb | 2011-04-01 00:35:21 -0300 | [diff] [blame] | 739 | * so release the lock */ |
Gustavo F. Padovan | 2461daa | 2011-06-17 12:57:25 -0300 | [diff] [blame] | 740 | read_unlock(&conn->chan_lock); |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 741 | l2cap_chan_close(chan, ECONNRESET); |
Gustavo F. Padovan | 2461daa | 2011-06-17 12:57:25 -0300 | [diff] [blame] | 742 | read_lock(&conn->chan_lock); |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 743 | bh_unlock_sock(sk); |
| 744 | continue; |
| 745 | } |
| 746 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 747 | req.scid = cpu_to_le16(chan->scid); |
| 748 | req.psm = chan->psm; |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 749 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 750 | chan->ident = l2cap_get_ident(conn); |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 751 | set_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 752 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 753 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_REQ, |
| 754 | sizeof(req), &req); |
Gustavo F. Padovan | 47731de | 2010-07-09 16:38:35 -0300 | [diff] [blame] | 755 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 756 | } else if (chan->state == BT_CONNECT2) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 757 | struct l2cap_conn_rsp rsp; |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 758 | char buf[128]; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 759 | rsp.scid = cpu_to_le16(chan->dcid); |
| 760 | rsp.dcid = cpu_to_le16(chan->scid); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 761 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 762 | if (l2cap_check_security(chan)) { |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 763 | if (bt_sk(sk)->defer_setup) { |
| 764 | struct sock *parent = bt_sk(sk)->parent; |
| 765 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); |
| 766 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHOR_PEND); |
Ilia Kolomisnky | 05e9a2f | 2011-07-15 18:30:21 +0000 | [diff] [blame] | 767 | if (parent) |
| 768 | parent->sk_data_ready(parent, 0); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 769 | |
| 770 | } else { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 771 | l2cap_state_change(chan, BT_CONFIG); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 772 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); |
| 773 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 774 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 775 | } else { |
| 776 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); |
| 777 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHEN_PEND); |
| 778 | } |
| 779 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 780 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, |
| 781 | sizeof(rsp), &rsp); |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 782 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 783 | if (test_bit(CONF_REQ_SENT, &chan->conf_state) || |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 784 | rsp.result != L2CAP_CR_SUCCESS) { |
| 785 | bh_unlock_sock(sk); |
| 786 | continue; |
| 787 | } |
| 788 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 789 | set_bit(CONF_REQ_SENT, &chan->conf_state); |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 790 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 791 | l2cap_build_conf_req(chan, buf), buf); |
| 792 | chan->num_conf_req++; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 793 | } |
| 794 | |
| 795 | bh_unlock_sock(sk); |
| 796 | } |
| 797 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 798 | read_unlock(&conn->chan_lock); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 799 | } |
| 800 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 801 | /* Find socket with cid and source bdaddr. |
| 802 | * Returns closest match, locked. |
| 803 | */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 804 | 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] | 805 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 806 | struct l2cap_chan *c, *c1 = NULL; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 807 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 808 | read_lock(&chan_list_lock); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 809 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 810 | list_for_each_entry(c, &chan_list, global_l) { |
| 811 | struct sock *sk = c->sk; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 812 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 813 | if (state && c->state != state) |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 814 | continue; |
| 815 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 816 | if (c->scid == cid) { |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 817 | /* Exact match. */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 818 | if (!bacmp(&bt_sk(sk)->src, src)) { |
| 819 | read_unlock(&chan_list_lock); |
| 820 | return c; |
| 821 | } |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 822 | |
| 823 | /* Closest match */ |
| 824 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 825 | c1 = c; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 826 | } |
| 827 | } |
Gustavo F. Padovan | 280f294 | 2011-04-13 19:01:22 -0300 | [diff] [blame] | 828 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 829 | read_unlock(&chan_list_lock); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 830 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 831 | return c1; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 832 | } |
| 833 | |
| 834 | static void l2cap_le_conn_ready(struct l2cap_conn *conn) |
| 835 | { |
Gustavo F. Padovan | c916fbe | 2011-04-04 16:00:55 -0300 | [diff] [blame] | 836 | struct sock *parent, *sk; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 837 | struct l2cap_chan *chan, *pchan; |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 838 | |
| 839 | BT_DBG(""); |
| 840 | |
| 841 | /* Check if we have socket listening on cid */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 842 | pchan = l2cap_global_chan_by_scid(BT_LISTEN, L2CAP_CID_LE_DATA, |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 843 | conn->src); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 844 | if (!pchan) |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 845 | return; |
| 846 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 847 | parent = pchan->sk; |
| 848 | |
Gustavo F. Padovan | 62f3a2c | 2011-04-14 18:34:34 -0300 | [diff] [blame] | 849 | bh_lock_sock(parent); |
| 850 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 851 | /* Check for backlog size */ |
| 852 | if (sk_acceptq_is_full(parent)) { |
| 853 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
| 854 | goto clean; |
| 855 | } |
| 856 | |
Gustavo F. Padovan | 80808e4 | 2011-05-16 17:24:37 -0300 | [diff] [blame] | 857 | chan = pchan->ops->new_connection(pchan->data); |
| 858 | if (!chan) |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 859 | goto clean; |
| 860 | |
Gustavo F. Padovan | 80808e4 | 2011-05-16 17:24:37 -0300 | [diff] [blame] | 861 | sk = chan->sk; |
Gustavo F. Padovan | 5d41ce1 | 2011-04-08 15:40:02 -0300 | [diff] [blame] | 862 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 863 | write_lock_bh(&conn->chan_lock); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 864 | |
| 865 | hci_conn_hold(conn->hcon); |
| 866 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 867 | bacpy(&bt_sk(sk)->src, conn->src); |
| 868 | bacpy(&bt_sk(sk)->dst, conn->dst); |
| 869 | |
Gustavo F. Padovan | d101024 | 2011-03-25 00:39:48 -0300 | [diff] [blame] | 870 | bt_accept_enqueue(parent, sk); |
| 871 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 872 | __l2cap_chan_add(conn, chan); |
| 873 | |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 874 | __set_chan_timer(chan, sk->sk_sndtimeo); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 875 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 876 | l2cap_state_change(chan, BT_CONNECTED); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 877 | parent->sk_data_ready(parent, 0); |
| 878 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 879 | write_unlock_bh(&conn->chan_lock); |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 880 | |
| 881 | clean: |
| 882 | bh_unlock_sock(parent); |
| 883 | } |
| 884 | |
Vinicius Costa Gomes | f1cb9af | 2011-01-26 21:42:57 -0300 | [diff] [blame] | 885 | static void l2cap_chan_ready(struct sock *sk) |
| 886 | { |
| 887 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
| 888 | struct sock *parent = bt_sk(sk)->parent; |
| 889 | |
| 890 | BT_DBG("sk %p, parent %p", sk, parent); |
| 891 | |
| 892 | chan->conf_state = 0; |
| 893 | __clear_chan_timer(chan); |
| 894 | |
Vinicius Costa Gomes | 43f3dc4 | 2011-06-20 18:53:18 -0300 | [diff] [blame] | 895 | l2cap_state_change(chan, BT_CONNECTED); |
Vinicius Costa Gomes | f1cb9af | 2011-01-26 21:42:57 -0300 | [diff] [blame] | 896 | sk->sk_state_change(sk); |
| 897 | |
| 898 | if (parent) |
| 899 | parent->sk_data_ready(parent, 0); |
| 900 | } |
| 901 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 902 | static void l2cap_conn_ready(struct l2cap_conn *conn) |
| 903 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 904 | struct l2cap_chan *chan; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 905 | |
| 906 | BT_DBG("conn %p", conn); |
| 907 | |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 908 | if (!conn->hcon->out && conn->hcon->type == LE_LINK) |
| 909 | l2cap_le_conn_ready(conn); |
| 910 | |
Vinicius Costa Gomes | 160dc6a | 2011-08-19 21:06:55 -0300 | [diff] [blame] | 911 | if (conn->hcon->out && conn->hcon->type == LE_LINK) |
| 912 | smp_conn_security(conn, conn->hcon->pending_sec_level); |
| 913 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 914 | read_lock(&conn->chan_lock); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 915 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 916 | list_for_each_entry(chan, &conn->chan_l, list) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 917 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 918 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 919 | bh_lock_sock(sk); |
| 920 | |
Vinicius Costa Gomes | 6312845 | 2011-06-17 22:46:26 -0300 | [diff] [blame] | 921 | if (conn->hcon->type == LE_LINK) { |
Anderson Briglia | b501d6a | 2011-06-07 18:46:31 -0300 | [diff] [blame] | 922 | if (smp_conn_security(conn, chan->sec_level)) |
Vinicius Costa Gomes | f1cb9af | 2011-01-26 21:42:57 -0300 | [diff] [blame] | 923 | l2cap_chan_ready(sk); |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 924 | |
Vinicius Costa Gomes | 6312845 | 2011-06-17 22:46:26 -0300 | [diff] [blame] | 925 | } else if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 926 | __clear_chan_timer(chan); |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 927 | l2cap_state_change(chan, BT_CONNECTED); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 928 | sk->sk_state_change(sk); |
Anderson Briglia | b501d6a | 2011-06-07 18:46:31 -0300 | [diff] [blame] | 929 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 930 | } else if (chan->state == BT_CONNECT) |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 931 | l2cap_do_start(chan); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 932 | |
| 933 | bh_unlock_sock(sk); |
| 934 | } |
| 935 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 936 | read_unlock(&conn->chan_lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 937 | } |
| 938 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 939 | /* Notify sockets that we cannot guaranty reliability anymore */ |
| 940 | static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) |
| 941 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 942 | struct l2cap_chan *chan; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 943 | |
| 944 | BT_DBG("conn %p", conn); |
| 945 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 946 | read_lock(&conn->chan_lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 947 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 948 | list_for_each_entry(chan, &conn->chan_l, list) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 949 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 950 | |
Andrei Emeltchenko | ecf61bd | 2011-10-11 14:04:32 +0300 | [diff] [blame] | 951 | if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags)) |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 952 | sk->sk_err = err; |
| 953 | } |
| 954 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 955 | read_unlock(&conn->chan_lock); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 956 | } |
| 957 | |
| 958 | static void l2cap_info_timeout(unsigned long arg) |
| 959 | { |
| 960 | struct l2cap_conn *conn = (void *) arg; |
| 961 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 962 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 963 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 964 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 965 | l2cap_conn_start(conn); |
| 966 | } |
| 967 | |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 968 | static void l2cap_conn_del(struct hci_conn *hcon, int err) |
| 969 | { |
| 970 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 971 | struct l2cap_chan *chan, *l; |
| 972 | struct sock *sk; |
| 973 | |
| 974 | if (!conn) |
| 975 | return; |
| 976 | |
| 977 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); |
| 978 | |
| 979 | kfree_skb(conn->rx_skb); |
| 980 | |
| 981 | /* Kill channels */ |
| 982 | list_for_each_entry_safe(chan, l, &conn->chan_l, list) { |
| 983 | sk = chan->sk; |
| 984 | bh_lock_sock(sk); |
| 985 | l2cap_chan_del(chan, err); |
| 986 | bh_unlock_sock(sk); |
| 987 | chan->ops->close(chan->data); |
| 988 | } |
| 989 | |
| 990 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) |
| 991 | del_timer_sync(&conn->info_timer); |
| 992 | |
Vinicius Costa Gomes | d26a234 | 2011-08-19 21:06:51 -0300 | [diff] [blame] | 993 | if (test_and_clear_bit(HCI_CONN_LE_SMP_PEND, &hcon->pend)) { |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 994 | del_timer(&conn->security_timer); |
Vinicius Costa Gomes | 8aab475 | 2011-09-05 14:31:31 -0300 | [diff] [blame] | 995 | smp_chan_destroy(conn); |
Vinicius Costa Gomes | d26a234 | 2011-08-19 21:06:51 -0300 | [diff] [blame] | 996 | } |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 997 | |
| 998 | hcon->l2cap_data = NULL; |
| 999 | kfree(conn); |
| 1000 | } |
| 1001 | |
| 1002 | static void security_timeout(unsigned long arg) |
| 1003 | { |
| 1004 | struct l2cap_conn *conn = (void *) arg; |
| 1005 | |
| 1006 | l2cap_conn_del(conn->hcon, ETIMEDOUT); |
| 1007 | } |
| 1008 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) |
| 1010 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 1011 | struct l2cap_conn *conn = hcon->l2cap_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 1013 | if (conn || status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | return conn; |
| 1015 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 1016 | conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC); |
| 1017 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1018 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | |
| 1020 | hcon->l2cap_data = conn; |
| 1021 | conn->hcon = hcon; |
| 1022 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 1023 | BT_DBG("hcon %p conn %p", hcon, conn); |
| 1024 | |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 1025 | if (hcon->hdev->le_mtu && hcon->type == LE_LINK) |
| 1026 | conn->mtu = hcon->hdev->le_mtu; |
| 1027 | else |
| 1028 | conn->mtu = hcon->hdev->acl_mtu; |
| 1029 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1030 | conn->src = &hcon->hdev->bdaddr; |
| 1031 | conn->dst = &hcon->dst; |
| 1032 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1033 | conn->feat_mask = 0; |
| 1034 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1035 | spin_lock_init(&conn->lock); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1036 | rwlock_init(&conn->chan_lock); |
| 1037 | |
| 1038 | INIT_LIST_HEAD(&conn->chan_l); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | |
Vinicius Costa Gomes | 5d3de7d | 2011-06-14 13:37:41 -0300 | [diff] [blame] | 1040 | if (hcon->type == LE_LINK) |
| 1041 | setup_timer(&conn->security_timer, security_timeout, |
| 1042 | (unsigned long) conn); |
| 1043 | else |
Ville Tervo | b62f328 | 2011-02-10 22:38:50 -0300 | [diff] [blame] | 1044 | setup_timer(&conn->info_timer, l2cap_info_timeout, |
Dave Young | 45054dc | 2009-10-18 20:28:30 +0000 | [diff] [blame] | 1045 | (unsigned long) conn); |
| 1046 | |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 1047 | conn->disc_reason = 0x13; |
| 1048 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | return conn; |
| 1050 | } |
| 1051 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1052 | 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] | 1053 | { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1054 | write_lock_bh(&conn->chan_lock); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1055 | __l2cap_chan_add(conn, chan); |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1056 | write_unlock_bh(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | } |
| 1058 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | /* ---- Socket interface ---- */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | |
| 1061 | /* Find socket with psm and source bdaddr. |
| 1062 | * Returns closest match. |
| 1063 | */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1064 | 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] | 1065 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1066 | struct l2cap_chan *c, *c1 = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1068 | read_lock(&chan_list_lock); |
Gustavo F. Padovan | e0f0cb5 | 2010-11-01 18:43:53 +0000 | [diff] [blame] | 1069 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1070 | list_for_each_entry(c, &chan_list, global_l) { |
| 1071 | struct sock *sk = c->sk; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1072 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1073 | if (state && c->state != state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | continue; |
| 1075 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1076 | if (c->psm == psm) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | /* Exact match. */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1078 | if (!bacmp(&bt_sk(sk)->src, src)) { |
Johannes Berg | a7567b2 | 2011-06-01 08:29:54 +0200 | [diff] [blame] | 1079 | read_unlock(&chan_list_lock); |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1080 | return c; |
| 1081 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | |
| 1083 | /* Closest match */ |
| 1084 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1085 | c1 = c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | } |
| 1087 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1089 | read_unlock(&chan_list_lock); |
Gustavo F. Padovan | e0f0cb5 | 2010-11-01 18:43:53 +0000 | [diff] [blame] | 1090 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 1091 | return c1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | } |
| 1093 | |
Gustavo F. Padovan | 77a74c7 | 2011-04-12 18:17:14 -0300 | [diff] [blame] | 1094 | int l2cap_chan_connect(struct l2cap_chan *chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | { |
Gustavo F. Padovan | 5d41ce1 | 2011-04-08 15:40:02 -0300 | [diff] [blame] | 1096 | struct sock *sk = chan->sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1097 | bdaddr_t *src = &bt_sk(sk)->src; |
| 1098 | bdaddr_t *dst = &bt_sk(sk)->dst; |
| 1099 | struct l2cap_conn *conn; |
| 1100 | struct hci_conn *hcon; |
| 1101 | struct hci_dev *hdev; |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 1102 | __u8 auth_type; |
Marcel Holtmann | 44d0e48 | 2009-04-20 07:09:16 +0200 | [diff] [blame] | 1103 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1105 | 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] | 1106 | chan->psm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1107 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 1108 | hdev = hci_get_route(dst, src); |
| 1109 | if (!hdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | return -EHOSTUNREACH; |
| 1111 | |
| 1112 | hci_dev_lock_bh(hdev); |
| 1113 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1114 | auth_type = l2cap_get_auth_type(chan); |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 1115 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1116 | if (chan->dcid == L2CAP_CID_LE_DATA) |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 1117 | hcon = hci_connect(hdev, LE_LINK, dst, |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1118 | chan->sec_level, auth_type); |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 1119 | else |
| 1120 | hcon = hci_connect(hdev, ACL_LINK, dst, |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1121 | chan->sec_level, auth_type); |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 1122 | |
Ville Tervo | 30e7627 | 2011-02-22 16:10:53 -0300 | [diff] [blame] | 1123 | if (IS_ERR(hcon)) { |
| 1124 | err = PTR_ERR(hcon); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | goto done; |
Ville Tervo | 30e7627 | 2011-02-22 16:10:53 -0300 | [diff] [blame] | 1126 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | |
| 1128 | conn = l2cap_conn_add(hcon, 0); |
| 1129 | if (!conn) { |
| 1130 | hci_conn_put(hcon); |
Ville Tervo | 30e7627 | 2011-02-22 16:10:53 -0300 | [diff] [blame] | 1131 | err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | goto done; |
| 1133 | } |
| 1134 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | /* Update source addr of the socket */ |
| 1136 | bacpy(src, conn->src); |
| 1137 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1138 | l2cap_chan_add(conn, chan); |
| 1139 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1140 | l2cap_state_change(chan, BT_CONNECT); |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 1141 | __set_chan_timer(chan, sk->sk_sndtimeo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | |
| 1143 | if (hcon->state == BT_CONNECTED) { |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 1144 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) { |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 1145 | __clear_chan_timer(chan); |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1146 | if (l2cap_check_security(chan)) |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1147 | l2cap_state_change(chan, BT_CONNECTED); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1148 | } else |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 1149 | l2cap_do_start(chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1150 | } |
| 1151 | |
Ville Tervo | 30e7627 | 2011-02-22 16:10:53 -0300 | [diff] [blame] | 1152 | err = 0; |
| 1153 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | done: |
| 1155 | hci_dev_unlock_bh(hdev); |
| 1156 | hci_dev_put(hdev); |
| 1157 | return err; |
| 1158 | } |
| 1159 | |
Gustavo F. Padovan | dcba0db | 2011-02-04 03:08:36 -0200 | [diff] [blame] | 1160 | int __l2cap_wait_ack(struct sock *sk) |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1161 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1162 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1163 | DECLARE_WAITQUEUE(wait, current); |
| 1164 | int err = 0; |
| 1165 | int timeo = HZ/5; |
| 1166 | |
Marcel Holtmann | 2b0b05d | 2010-05-10 11:33:10 +0200 | [diff] [blame] | 1167 | add_wait_queue(sk_sleep(sk), &wait); |
Peter Hurley | a71a0cf | 2011-07-25 18:36:26 -0400 | [diff] [blame] | 1168 | set_current_state(TASK_INTERRUPTIBLE); |
| 1169 | while (chan->unacked_frames > 0 && chan->conn) { |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1170 | if (!timeo) |
| 1171 | timeo = HZ/5; |
| 1172 | |
| 1173 | if (signal_pending(current)) { |
| 1174 | err = sock_intr_errno(timeo); |
| 1175 | break; |
| 1176 | } |
| 1177 | |
| 1178 | release_sock(sk); |
| 1179 | timeo = schedule_timeout(timeo); |
| 1180 | lock_sock(sk); |
Peter Hurley | a71a0cf | 2011-07-25 18:36:26 -0400 | [diff] [blame] | 1181 | set_current_state(TASK_INTERRUPTIBLE); |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1182 | |
| 1183 | err = sock_error(sk); |
| 1184 | if (err) |
| 1185 | break; |
| 1186 | } |
| 1187 | set_current_state(TASK_RUNNING); |
Marcel Holtmann | 2b0b05d | 2010-05-10 11:33:10 +0200 | [diff] [blame] | 1188 | remove_wait_queue(sk_sleep(sk), &wait); |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1189 | return err; |
| 1190 | } |
| 1191 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1192 | static void l2cap_monitor_timeout(unsigned long arg) |
| 1193 | { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1194 | struct l2cap_chan *chan = (void *) arg; |
| 1195 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1196 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1197 | BT_DBG("chan %p", chan); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 1198 | |
Gustavo F. Padovan | e686219 | 2009-08-24 00:45:19 -0300 | [diff] [blame] | 1199 | bh_lock_sock(sk); |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1200 | if (chan->retry_count >= chan->remote_max_tx) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1201 | l2cap_send_disconn_req(chan->conn, chan, ECONNABORTED); |
Andrei Emeltchenko | b13f586 | 2009-12-15 11:38:04 +0200 | [diff] [blame] | 1202 | bh_unlock_sock(sk); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1203 | return; |
| 1204 | } |
| 1205 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1206 | chan->retry_count++; |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 1207 | __set_monitor_timer(chan); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1208 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1209 | l2cap_send_rr_or_rnr(chan, L2CAP_CTRL_POLL); |
Gustavo F. Padovan | e686219 | 2009-08-24 00:45:19 -0300 | [diff] [blame] | 1210 | bh_unlock_sock(sk); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1211 | } |
| 1212 | |
| 1213 | static void l2cap_retrans_timeout(unsigned long arg) |
| 1214 | { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1215 | struct l2cap_chan *chan = (void *) arg; |
| 1216 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1217 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 1218 | BT_DBG("chan %p", chan); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 1219 | |
Gustavo F. Padovan | e686219 | 2009-08-24 00:45:19 -0300 | [diff] [blame] | 1220 | bh_lock_sock(sk); |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1221 | chan->retry_count = 1; |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 1222 | __set_monitor_timer(chan); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1223 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1224 | set_bit(CONN_WAIT_F, &chan->conn_state); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1225 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1226 | l2cap_send_rr_or_rnr(chan, L2CAP_CTRL_POLL); |
Gustavo F. Padovan | e686219 | 2009-08-24 00:45:19 -0300 | [diff] [blame] | 1227 | bh_unlock_sock(sk); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1228 | } |
| 1229 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1230 | static void l2cap_drop_acked_frames(struct l2cap_chan *chan) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1231 | { |
| 1232 | struct sk_buff *skb; |
| 1233 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1234 | while ((skb = skb_peek(&chan->tx_q)) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1235 | chan->unacked_frames) { |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1236 | if (bt_cb(skb)->tx_seq == chan->expected_ack_seq) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1237 | break; |
| 1238 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1239 | skb = skb_dequeue(&chan->tx_q); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1240 | kfree_skb(skb); |
| 1241 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1242 | chan->unacked_frames--; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1243 | } |
| 1244 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1245 | if (!chan->unacked_frames) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 1246 | __clear_retrans_timer(chan); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1247 | } |
| 1248 | |
Szymon Janc | 67c9e84 | 2011-07-28 16:24:33 +0200 | [diff] [blame] | 1249 | static void l2cap_do_send(struct l2cap_chan *chan, struct sk_buff *skb) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1250 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1251 | struct hci_conn *hcon = chan->conn->hcon; |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 1252 | u16 flags; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1253 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1254 | 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] | 1255 | |
Andrei Emeltchenko | d57b0e8 | 2011-10-11 14:04:31 +0300 | [diff] [blame] | 1256 | if (!test_bit(FLAG_FLUSHABLE, &chan->flags) && |
| 1257 | lmp_no_flush_capable(hcon->hdev)) |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 1258 | flags = ACL_START_NO_FLUSH; |
| 1259 | else |
| 1260 | flags = ACL_START; |
| 1261 | |
Andrei Emeltchenko | 15770b1 | 2011-10-11 14:04:33 +0300 | [diff] [blame] | 1262 | bt_cb(skb)->force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags); |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 1263 | hci_send_acl(hcon, skb, flags); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1264 | } |
| 1265 | |
Szymon Janc | 67c9e84 | 2011-07-28 16:24:33 +0200 | [diff] [blame] | 1266 | static void l2cap_streaming_send(struct l2cap_chan *chan) |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1267 | { |
Gustavo F. Padovan | ccbb84a | 2010-08-30 18:44:44 -0300 | [diff] [blame] | 1268 | struct sk_buff *skb; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1269 | u16 control, fcs; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1270 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1271 | while ((skb = skb_dequeue(&chan->tx_q))) { |
Gustavo F. Padovan | ccbb84a | 2010-08-30 18:44:44 -0300 | [diff] [blame] | 1272 | control = get_unaligned_le16(skb->data + L2CAP_HDR_SIZE); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1273 | control |= chan->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT; |
Gustavo F. Padovan | ccbb84a | 2010-08-30 18:44:44 -0300 | [diff] [blame] | 1274 | put_unaligned_le16(control, skb->data + L2CAP_HDR_SIZE); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1275 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1276 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Gustavo F. Padovan | ccbb84a | 2010-08-30 18:44:44 -0300 | [diff] [blame] | 1277 | fcs = crc16(0, (u8 *)skb->data, skb->len - 2); |
| 1278 | put_unaligned_le16(fcs, skb->data + skb->len - 2); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1279 | } |
| 1280 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1281 | l2cap_do_send(chan, skb); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1282 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1283 | chan->next_tx_seq = (chan->next_tx_seq + 1) % 64; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1284 | } |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1285 | } |
| 1286 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1287 | 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] | 1288 | { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1289 | struct sk_buff *skb, *tx_skb; |
| 1290 | u16 control, fcs; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1291 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1292 | skb = skb_peek(&chan->tx_q); |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1293 | if (!skb) |
| 1294 | return; |
| 1295 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1296 | do { |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1297 | if (bt_cb(skb)->tx_seq == tx_seq) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1298 | break; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1299 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1300 | if (skb_queue_is_last(&chan->tx_q, skb)) |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1301 | return; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1302 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1303 | } while ((skb = skb_queue_next(&chan->tx_q, skb))); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1304 | |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1305 | if (chan->remote_max_tx && |
| 1306 | bt_cb(skb)->retries == chan->remote_max_tx) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1307 | l2cap_send_disconn_req(chan->conn, chan, ECONNABORTED); |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1308 | return; |
| 1309 | } |
| 1310 | |
| 1311 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
| 1312 | bt_cb(skb)->retries++; |
| 1313 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); |
Ruiyi Zhang | a429b51 | 2011-04-18 11:04:30 +0800 | [diff] [blame] | 1314 | control &= L2CAP_CTRL_SAR; |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 1315 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1316 | if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state)) |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 1317 | control |= L2CAP_CTRL_FINAL; |
Gustavo F. Padovan | 95ffa97 | 2010-06-18 20:37:33 -0300 | [diff] [blame] | 1318 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1319 | control |= (chan->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT) |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1320 | | (tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 1321 | |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1322 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); |
| 1323 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1324 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1325 | fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2); |
| 1326 | put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2); |
| 1327 | } |
| 1328 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1329 | l2cap_do_send(chan, tx_skb); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1330 | } |
| 1331 | |
Szymon Janc | 67c9e84 | 2011-07-28 16:24:33 +0200 | [diff] [blame] | 1332 | static int l2cap_ertm_send(struct l2cap_chan *chan) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1333 | { |
| 1334 | struct sk_buff *skb, *tx_skb; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1335 | u16 control, fcs; |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1336 | int nsent = 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1337 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 1338 | if (chan->state != BT_CONNECTED) |
Gustavo F. Padovan | c13ffa6 | 2010-05-13 20:50:12 -0300 | [diff] [blame] | 1339 | return -ENOTCONN; |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1340 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1341 | while ((skb = chan->tx_send_head) && (!l2cap_tx_window_full(chan))) { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1342 | |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1343 | if (chan->remote_max_tx && |
| 1344 | bt_cb(skb)->retries == chan->remote_max_tx) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1345 | l2cap_send_disconn_req(chan->conn, chan, ECONNABORTED); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1346 | break; |
| 1347 | } |
| 1348 | |
Andrei Emeltchenko | e420aba | 2009-12-23 13:07:14 +0200 | [diff] [blame] | 1349 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
| 1350 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1351 | bt_cb(skb)->retries++; |
| 1352 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1353 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); |
Gustavo F. Padovan | 95ffa97 | 2010-06-18 20:37:33 -0300 | [diff] [blame] | 1354 | control &= L2CAP_CTRL_SAR; |
| 1355 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1356 | if (test_and_clear_bit(CONN_SEND_FBIT, &chan->conn_state)) |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 1357 | control |= L2CAP_CTRL_FINAL; |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1358 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1359 | control |= (chan->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT) |
| 1360 | | (chan->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1361 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); |
| 1362 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1363 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1364 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1365 | fcs = crc16(0, (u8 *)skb->data, tx_skb->len - 2); |
| 1366 | put_unaligned_le16(fcs, skb->data + tx_skb->len - 2); |
| 1367 | } |
| 1368 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 1369 | l2cap_do_send(chan, tx_skb); |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1370 | |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 1371 | __set_retrans_timer(chan); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1372 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1373 | bt_cb(skb)->tx_seq = chan->next_tx_seq; |
| 1374 | chan->next_tx_seq = (chan->next_tx_seq + 1) % 64; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1375 | |
Suraj Sumangala | 23e9fde | 2011-03-09 14:44:05 +0530 | [diff] [blame] | 1376 | if (bt_cb(skb)->retries == 1) |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1377 | chan->unacked_frames++; |
Suraj Sumangala | 23e9fde | 2011-03-09 14:44:05 +0530 | [diff] [blame] | 1378 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1379 | chan->frames_sent++; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1380 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1381 | if (skb_queue_is_last(&chan->tx_q, skb)) |
| 1382 | chan->tx_send_head = NULL; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1383 | else |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1384 | chan->tx_send_head = skb_queue_next(&chan->tx_q, skb); |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1385 | |
| 1386 | nsent++; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1387 | } |
| 1388 | |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1389 | return nsent; |
| 1390 | } |
| 1391 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1392 | static int l2cap_retransmit_frames(struct l2cap_chan *chan) |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1393 | { |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1394 | int ret; |
| 1395 | |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1396 | if (!skb_queue_empty(&chan->tx_q)) |
| 1397 | chan->tx_send_head = chan->tx_q.next; |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1398 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1399 | chan->next_tx_seq = chan->expected_ack_seq; |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1400 | ret = l2cap_ertm_send(chan); |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1401 | return ret; |
| 1402 | } |
| 1403 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1404 | static void l2cap_send_ack(struct l2cap_chan *chan) |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1405 | { |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1406 | u16 control = 0; |
| 1407 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1408 | control |= chan->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1409 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1410 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1411 | control |= L2CAP_SUPER_RCV_NOT_READY; |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1412 | set_bit(CONN_RNR_SENT, &chan->conn_state); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1413 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1414 | return; |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1415 | } |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1416 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1417 | if (l2cap_ertm_send(chan) > 0) |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 1418 | return; |
| 1419 | |
| 1420 | control |= L2CAP_SUPER_RCV_READY; |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1421 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1422 | } |
| 1423 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1424 | static void l2cap_send_srejtail(struct l2cap_chan *chan) |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 1425 | { |
| 1426 | struct srej_list *tail; |
| 1427 | u16 control; |
| 1428 | |
| 1429 | control = L2CAP_SUPER_SELECT_REJECT; |
| 1430 | control |= L2CAP_CTRL_FINAL; |
| 1431 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 1432 | tail = list_entry((&chan->srej_l)->prev, struct srej_list, list); |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 1433 | control |= tail->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
| 1434 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1435 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 1436 | } |
| 1437 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1438 | 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] | 1439 | { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1440 | struct l2cap_conn *conn = l2cap_pi(sk)->chan->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1441 | struct sk_buff **frag; |
| 1442 | int err, sent = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1443 | |
Gustavo F. Padovan | 59203a2 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1444 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1445 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1446 | |
| 1447 | sent += count; |
| 1448 | len -= count; |
| 1449 | |
| 1450 | /* Continuation fragments (no L2CAP header) */ |
| 1451 | frag = &skb_shinfo(skb)->frag_list; |
| 1452 | while (len) { |
| 1453 | count = min_t(unsigned int, conn->mtu, len); |
| 1454 | |
| 1455 | *frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err); |
| 1456 | if (!*frag) |
Gustavo F. Padovan | 0175d62 | 2010-09-24 20:30:57 -0300 | [diff] [blame] | 1457 | return err; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1458 | if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) |
| 1459 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1460 | |
| 1461 | sent += count; |
| 1462 | len -= count; |
| 1463 | |
| 1464 | frag = &(*frag)->next; |
| 1465 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1466 | |
| 1467 | return sent; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1468 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1469 | |
Szymon Janc | 67c9e84 | 2011-07-28 16:24:33 +0200 | [diff] [blame] | 1470 | static struct sk_buff *l2cap_create_connless_pdu(struct l2cap_chan *chan, struct msghdr *msg, size_t len) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1471 | { |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1472 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1473 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1474 | struct sk_buff *skb; |
| 1475 | int err, count, hlen = L2CAP_HDR_SIZE + 2; |
| 1476 | struct l2cap_hdr *lh; |
| 1477 | |
| 1478 | BT_DBG("sk %p len %d", sk, (int)len); |
| 1479 | |
| 1480 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
| 1481 | skb = bt_skb_send_alloc(sk, count + hlen, |
| 1482 | msg->msg_flags & MSG_DONTWAIT, &err); |
| 1483 | if (!skb) |
Gustavo F. Padovan | 0175d62 | 2010-09-24 20:30:57 -0300 | [diff] [blame] | 1484 | return ERR_PTR(err); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1485 | |
| 1486 | /* Create L2CAP header */ |
| 1487 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1488 | lh->cid = cpu_to_le16(chan->dcid); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1489 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1490 | put_unaligned_le16(chan->psm, skb_put(skb, 2)); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1491 | |
| 1492 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); |
| 1493 | if (unlikely(err < 0)) { |
| 1494 | kfree_skb(skb); |
| 1495 | return ERR_PTR(err); |
| 1496 | } |
| 1497 | return skb; |
| 1498 | } |
| 1499 | |
Szymon Janc | 67c9e84 | 2011-07-28 16:24:33 +0200 | [diff] [blame] | 1500 | static struct sk_buff *l2cap_create_basic_pdu(struct l2cap_chan *chan, struct msghdr *msg, size_t len) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1501 | { |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1502 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1503 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1504 | struct sk_buff *skb; |
| 1505 | int err, count, hlen = L2CAP_HDR_SIZE; |
| 1506 | struct l2cap_hdr *lh; |
| 1507 | |
| 1508 | BT_DBG("sk %p len %d", sk, (int)len); |
| 1509 | |
| 1510 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
| 1511 | skb = bt_skb_send_alloc(sk, count + hlen, |
| 1512 | msg->msg_flags & MSG_DONTWAIT, &err); |
| 1513 | if (!skb) |
Gustavo F. Padovan | 0175d62 | 2010-09-24 20:30:57 -0300 | [diff] [blame] | 1514 | return ERR_PTR(err); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1515 | |
| 1516 | /* Create L2CAP header */ |
| 1517 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1518 | lh->cid = cpu_to_le16(chan->dcid); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1519 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); |
| 1520 | |
| 1521 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); |
| 1522 | if (unlikely(err < 0)) { |
| 1523 | kfree_skb(skb); |
| 1524 | return ERR_PTR(err); |
| 1525 | } |
| 1526 | return skb; |
| 1527 | } |
| 1528 | |
Luiz Augusto von Dentz | ab0ff76 | 2011-09-12 20:00:50 +0300 | [diff] [blame] | 1529 | static struct sk_buff *l2cap_create_iframe_pdu(struct l2cap_chan *chan, |
| 1530 | struct msghdr *msg, size_t len, |
| 1531 | u16 control, u16 sdulen) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1532 | { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1533 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1534 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1535 | struct sk_buff *skb; |
| 1536 | int err, count, hlen = L2CAP_HDR_SIZE + 2; |
| 1537 | struct l2cap_hdr *lh; |
| 1538 | |
| 1539 | BT_DBG("sk %p len %d", sk, (int)len); |
| 1540 | |
Gustavo F. Padovan | 0ee0d20 | 2010-05-01 16:15:41 -0300 | [diff] [blame] | 1541 | if (!conn) |
| 1542 | return ERR_PTR(-ENOTCONN); |
| 1543 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1544 | if (sdulen) |
| 1545 | hlen += 2; |
| 1546 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1547 | if (chan->fcs == L2CAP_FCS_CRC16) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1548 | hlen += 2; |
| 1549 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1550 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
| 1551 | skb = bt_skb_send_alloc(sk, count + hlen, |
| 1552 | msg->msg_flags & MSG_DONTWAIT, &err); |
| 1553 | if (!skb) |
Gustavo F. Padovan | 0175d62 | 2010-09-24 20:30:57 -0300 | [diff] [blame] | 1554 | return ERR_PTR(err); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1555 | |
| 1556 | /* Create L2CAP header */ |
| 1557 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1558 | lh->cid = cpu_to_le16(chan->dcid); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1559 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); |
| 1560 | put_unaligned_le16(control, skb_put(skb, 2)); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1561 | if (sdulen) |
| 1562 | put_unaligned_le16(sdulen, skb_put(skb, 2)); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1563 | |
| 1564 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); |
| 1565 | if (unlikely(err < 0)) { |
| 1566 | kfree_skb(skb); |
| 1567 | return ERR_PTR(err); |
| 1568 | } |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1569 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1570 | if (chan->fcs == L2CAP_FCS_CRC16) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1571 | put_unaligned_le16(0, skb_put(skb, 2)); |
| 1572 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1573 | bt_cb(skb)->retries = 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1574 | return skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1575 | } |
| 1576 | |
Szymon Janc | 67c9e84 | 2011-07-28 16:24:33 +0200 | [diff] [blame] | 1577 | static int l2cap_sar_segment_sdu(struct l2cap_chan *chan, struct msghdr *msg, size_t len) |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1578 | { |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1579 | struct sk_buff *skb; |
| 1580 | struct sk_buff_head sar_queue; |
| 1581 | u16 control; |
| 1582 | size_t size = 0; |
| 1583 | |
Gustavo F. Padovan | ff12fd6 | 2010-05-05 22:09:15 -0300 | [diff] [blame] | 1584 | skb_queue_head_init(&sar_queue); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1585 | control = L2CAP_SDU_START; |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1586 | 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] | 1587 | if (IS_ERR(skb)) |
| 1588 | return PTR_ERR(skb); |
| 1589 | |
| 1590 | __skb_queue_tail(&sar_queue, skb); |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1591 | len -= chan->remote_mps; |
| 1592 | size += chan->remote_mps; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1593 | |
| 1594 | while (len > 0) { |
| 1595 | size_t buflen; |
| 1596 | |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1597 | if (len > chan->remote_mps) { |
Gustavo F. Padovan | 44651b8 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1598 | control = L2CAP_SDU_CONTINUE; |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 1599 | buflen = chan->remote_mps; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1600 | } else { |
Gustavo F. Padovan | 44651b8 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1601 | control = L2CAP_SDU_END; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1602 | buflen = len; |
| 1603 | } |
| 1604 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1605 | skb = l2cap_create_iframe_pdu(chan, msg, buflen, control, 0); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1606 | if (IS_ERR(skb)) { |
| 1607 | skb_queue_purge(&sar_queue); |
| 1608 | return PTR_ERR(skb); |
| 1609 | } |
| 1610 | |
| 1611 | __skb_queue_tail(&sar_queue, skb); |
| 1612 | len -= buflen; |
| 1613 | size += buflen; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1614 | } |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 1615 | skb_queue_splice_tail(&sar_queue, &chan->tx_q); |
| 1616 | if (chan->tx_send_head == NULL) |
| 1617 | chan->tx_send_head = sar_queue.next; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1618 | |
| 1619 | return size; |
| 1620 | } |
| 1621 | |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 1622 | int l2cap_chan_send(struct l2cap_chan *chan, struct msghdr *msg, size_t len) |
| 1623 | { |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 1624 | struct sk_buff *skb; |
| 1625 | u16 control; |
| 1626 | int err; |
| 1627 | |
| 1628 | /* Connectionless channel */ |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 1629 | if (chan->chan_type == L2CAP_CHAN_CONN_LESS) { |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 1630 | skb = l2cap_create_connless_pdu(chan, msg, len); |
| 1631 | if (IS_ERR(skb)) |
| 1632 | return PTR_ERR(skb); |
| 1633 | |
| 1634 | l2cap_do_send(chan, skb); |
| 1635 | return len; |
| 1636 | } |
| 1637 | |
| 1638 | switch (chan->mode) { |
| 1639 | case L2CAP_MODE_BASIC: |
| 1640 | /* Check outgoing MTU */ |
| 1641 | if (len > chan->omtu) |
| 1642 | return -EMSGSIZE; |
| 1643 | |
| 1644 | /* Create a basic PDU */ |
| 1645 | skb = l2cap_create_basic_pdu(chan, msg, len); |
| 1646 | if (IS_ERR(skb)) |
| 1647 | return PTR_ERR(skb); |
| 1648 | |
| 1649 | l2cap_do_send(chan, skb); |
| 1650 | err = len; |
| 1651 | break; |
| 1652 | |
| 1653 | case L2CAP_MODE_ERTM: |
| 1654 | case L2CAP_MODE_STREAMING: |
| 1655 | /* Entire SDU fits into one PDU */ |
| 1656 | if (len <= chan->remote_mps) { |
| 1657 | control = L2CAP_SDU_UNSEGMENTED; |
| 1658 | skb = l2cap_create_iframe_pdu(chan, msg, len, control, |
| 1659 | 0); |
| 1660 | if (IS_ERR(skb)) |
| 1661 | return PTR_ERR(skb); |
| 1662 | |
| 1663 | __skb_queue_tail(&chan->tx_q, skb); |
| 1664 | |
| 1665 | if (chan->tx_send_head == NULL) |
| 1666 | chan->tx_send_head = skb; |
| 1667 | |
| 1668 | } else { |
| 1669 | /* Segment SDU into multiples PDUs */ |
| 1670 | err = l2cap_sar_segment_sdu(chan, msg, len); |
| 1671 | if (err < 0) |
| 1672 | return err; |
| 1673 | } |
| 1674 | |
| 1675 | if (chan->mode == L2CAP_MODE_STREAMING) { |
| 1676 | l2cap_streaming_send(chan); |
| 1677 | err = len; |
| 1678 | break; |
| 1679 | } |
| 1680 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 1681 | if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state) && |
| 1682 | test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 9a91a04 | 2011-04-28 18:50:17 -0300 | [diff] [blame] | 1683 | err = len; |
| 1684 | break; |
| 1685 | } |
| 1686 | |
| 1687 | err = l2cap_ertm_send(chan); |
| 1688 | if (err >= 0) |
| 1689 | err = len; |
| 1690 | |
| 1691 | break; |
| 1692 | |
| 1693 | default: |
| 1694 | BT_DBG("bad state %1.1x", chan->mode); |
| 1695 | err = -EBADFD; |
| 1696 | } |
| 1697 | |
| 1698 | return err; |
| 1699 | } |
| 1700 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1701 | /* Copy frame to all raw sockets on that connection */ |
| 1702 | static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) |
| 1703 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1704 | struct sk_buff *nskb; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1705 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1706 | |
| 1707 | BT_DBG("conn %p", conn); |
| 1708 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1709 | read_lock(&conn->chan_lock); |
| 1710 | list_for_each_entry(chan, &conn->chan_l, list) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 1711 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 1712 | if (chan->chan_type != L2CAP_CHAN_RAW) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1713 | continue; |
| 1714 | |
| 1715 | /* Don't send frame to the socket it came from */ |
| 1716 | if (skb->sk == sk) |
| 1717 | continue; |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 1718 | nskb = skb_clone(skb, GFP_ATOMIC); |
| 1719 | if (!nskb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1720 | continue; |
| 1721 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 1722 | if (chan->ops->recv(chan->data, nskb)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1723 | kfree_skb(nskb); |
| 1724 | } |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 1725 | read_unlock(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1726 | } |
| 1727 | |
| 1728 | /* ---- L2CAP signalling commands ---- */ |
| 1729 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, |
| 1730 | u8 code, u8 ident, u16 dlen, void *data) |
| 1731 | { |
| 1732 | struct sk_buff *skb, **frag; |
| 1733 | struct l2cap_cmd_hdr *cmd; |
| 1734 | struct l2cap_hdr *lh; |
| 1735 | int len, count; |
| 1736 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 1737 | BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", |
| 1738 | conn, code, ident, dlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1739 | |
| 1740 | len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; |
| 1741 | count = min_t(unsigned int, conn->mtu, len); |
| 1742 | |
| 1743 | skb = bt_skb_alloc(count, GFP_ATOMIC); |
| 1744 | if (!skb) |
| 1745 | return NULL; |
| 1746 | |
| 1747 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1748 | lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 1749 | |
| 1750 | if (conn->hcon->type == LE_LINK) |
| 1751 | lh->cid = cpu_to_le16(L2CAP_CID_LE_SIGNALING); |
| 1752 | else |
| 1753 | lh->cid = cpu_to_le16(L2CAP_CID_SIGNALING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1754 | |
| 1755 | cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); |
| 1756 | cmd->code = code; |
| 1757 | cmd->ident = ident; |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1758 | cmd->len = cpu_to_le16(dlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1759 | |
| 1760 | if (dlen) { |
| 1761 | count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; |
| 1762 | memcpy(skb_put(skb, count), data, count); |
| 1763 | data += count; |
| 1764 | } |
| 1765 | |
| 1766 | len -= skb->len; |
| 1767 | |
| 1768 | /* Continuation fragments (no L2CAP header) */ |
| 1769 | frag = &skb_shinfo(skb)->frag_list; |
| 1770 | while (len) { |
| 1771 | count = min_t(unsigned int, conn->mtu, len); |
| 1772 | |
| 1773 | *frag = bt_skb_alloc(count, GFP_ATOMIC); |
| 1774 | if (!*frag) |
| 1775 | goto fail; |
| 1776 | |
| 1777 | memcpy(skb_put(*frag, count), data, count); |
| 1778 | |
| 1779 | len -= count; |
| 1780 | data += count; |
| 1781 | |
| 1782 | frag = &(*frag)->next; |
| 1783 | } |
| 1784 | |
| 1785 | return skb; |
| 1786 | |
| 1787 | fail: |
| 1788 | kfree_skb(skb); |
| 1789 | return NULL; |
| 1790 | } |
| 1791 | |
| 1792 | static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) |
| 1793 | { |
| 1794 | struct l2cap_conf_opt *opt = *ptr; |
| 1795 | int len; |
| 1796 | |
| 1797 | len = L2CAP_CONF_OPT_SIZE + opt->len; |
| 1798 | *ptr += len; |
| 1799 | |
| 1800 | *type = opt->type; |
| 1801 | *olen = opt->len; |
| 1802 | |
| 1803 | switch (opt->len) { |
| 1804 | case 1: |
| 1805 | *val = *((u8 *) opt->val); |
| 1806 | break; |
| 1807 | |
| 1808 | case 2: |
steven miao | bfaaeb3 | 2010-10-16 18:29:47 -0400 | [diff] [blame] | 1809 | *val = get_unaligned_le16(opt->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1810 | break; |
| 1811 | |
| 1812 | case 4: |
steven miao | bfaaeb3 | 2010-10-16 18:29:47 -0400 | [diff] [blame] | 1813 | *val = get_unaligned_le32(opt->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1814 | break; |
| 1815 | |
| 1816 | default: |
| 1817 | *val = (unsigned long) opt->val; |
| 1818 | break; |
| 1819 | } |
| 1820 | |
| 1821 | BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val); |
| 1822 | return len; |
| 1823 | } |
| 1824 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1825 | static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) |
| 1826 | { |
| 1827 | struct l2cap_conf_opt *opt = *ptr; |
| 1828 | |
| 1829 | BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val); |
| 1830 | |
| 1831 | opt->type = type; |
| 1832 | opt->len = len; |
| 1833 | |
| 1834 | switch (len) { |
| 1835 | case 1: |
| 1836 | *((u8 *) opt->val) = val; |
| 1837 | break; |
| 1838 | |
| 1839 | case 2: |
Gustavo F. Padovan | 4f8b691 | 2010-10-18 14:25:53 -0200 | [diff] [blame] | 1840 | put_unaligned_le16(val, opt->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1841 | break; |
| 1842 | |
| 1843 | case 4: |
Gustavo F. Padovan | 4f8b691 | 2010-10-18 14:25:53 -0200 | [diff] [blame] | 1844 | put_unaligned_le32(val, opt->val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1845 | break; |
| 1846 | |
| 1847 | default: |
| 1848 | memcpy(opt->val, (void *) val, len); |
| 1849 | break; |
| 1850 | } |
| 1851 | |
| 1852 | *ptr += L2CAP_CONF_OPT_SIZE + len; |
| 1853 | } |
| 1854 | |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 1855 | static void l2cap_ack_timeout(unsigned long arg) |
| 1856 | { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1857 | struct l2cap_chan *chan = (void *) arg; |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 1858 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1859 | bh_lock_sock(chan->sk); |
| 1860 | l2cap_send_ack(chan); |
| 1861 | bh_unlock_sock(chan->sk); |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 1862 | } |
| 1863 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1864 | static inline void l2cap_ertm_init(struct l2cap_chan *chan) |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 1865 | { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 1866 | struct sock *sk = chan->sk; |
| 1867 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1868 | chan->expected_ack_seq = 0; |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1869 | chan->unacked_frames = 0; |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 1870 | chan->buffer_seq = 0; |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 1871 | chan->num_acked = 0; |
| 1872 | chan->frames_sent = 0; |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 1873 | |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 1874 | setup_timer(&chan->retrans_timer, l2cap_retrans_timeout, |
| 1875 | (unsigned long) chan); |
| 1876 | setup_timer(&chan->monitor_timer, l2cap_monitor_timeout, |
| 1877 | (unsigned long) chan); |
| 1878 | setup_timer(&chan->ack_timer, l2cap_ack_timeout, (unsigned long) chan); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 1879 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 1880 | skb_queue_head_init(&chan->srej_q); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1881 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 1882 | INIT_LIST_HEAD(&chan->srej_l); |
| 1883 | |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 1884 | |
| 1885 | sk->sk_backlog_rcv = l2cap_ertm_data_rcv; |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 1886 | } |
| 1887 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1888 | static inline __u8 l2cap_select_mode(__u8 mode, __u16 remote_feat_mask) |
| 1889 | { |
| 1890 | switch (mode) { |
| 1891 | case L2CAP_MODE_STREAMING: |
| 1892 | case L2CAP_MODE_ERTM: |
| 1893 | if (l2cap_mode_supported(mode, remote_feat_mask)) |
| 1894 | return mode; |
| 1895 | /* fall through */ |
| 1896 | default: |
| 1897 | return L2CAP_MODE_BASIC; |
| 1898 | } |
| 1899 | } |
| 1900 | |
Gustavo F. Padovan | 710f9b0a | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 1901 | static int l2cap_build_conf_req(struct l2cap_chan *chan, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1902 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1903 | struct l2cap_conf_req *req = data; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 1904 | struct l2cap_conf_rfc rfc = { .mode = chan->mode }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1905 | void *ptr = req->data; |
| 1906 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 1907 | BT_DBG("chan %p", chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1908 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 1909 | if (chan->num_conf_req || chan->num_conf_rsp) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1910 | goto done; |
| 1911 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 1912 | switch (chan->mode) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1913 | case L2CAP_MODE_STREAMING: |
| 1914 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 1915 | if (test_bit(CONF_STATE2_DEVICE, &chan->conf_state)) |
Gustavo F. Padovan | 85eb53c | 2010-06-03 18:43:28 -0300 | [diff] [blame] | 1916 | break; |
Gustavo F. Padovan | 85eb53c | 2010-06-03 18:43:28 -0300 | [diff] [blame] | 1917 | |
Gustavo F. Padovan | 2ba13ed | 2010-06-09 16:39:05 -0300 | [diff] [blame] | 1918 | /* fall through */ |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1919 | default: |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1920 | chan->mode = l2cap_select_mode(rfc.mode, chan->conn->feat_mask); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1921 | break; |
| 1922 | } |
| 1923 | |
| 1924 | done: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 1925 | if (chan->imtu != L2CAP_DEFAULT_MTU) |
| 1926 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu); |
Gustavo F. Padovan | 7990681c | 2011-01-24 16:01:43 -0200 | [diff] [blame] | 1927 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 1928 | switch (chan->mode) { |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 1929 | case L2CAP_MODE_BASIC: |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1930 | if (!(chan->conn->feat_mask & L2CAP_FEAT_ERTM) && |
| 1931 | !(chan->conn->feat_mask & L2CAP_FEAT_STREAMING)) |
Gustavo F. Padovan | 6340650 | 2010-08-03 23:49:29 -0300 | [diff] [blame] | 1932 | break; |
| 1933 | |
Gustavo F. Padovan | 6254775 | 2010-06-08 20:05:31 -0300 | [diff] [blame] | 1934 | rfc.mode = L2CAP_MODE_BASIC; |
| 1935 | rfc.txwin_size = 0; |
| 1936 | rfc.max_transmit = 0; |
| 1937 | rfc.retrans_timeout = 0; |
| 1938 | rfc.monitor_timeout = 0; |
| 1939 | rfc.max_pdu_size = 0; |
| 1940 | |
Gustavo F. Padovan | 6340650 | 2010-08-03 23:49:29 -0300 | [diff] [blame] | 1941 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
| 1942 | (unsigned long) &rfc); |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 1943 | break; |
| 1944 | |
| 1945 | case L2CAP_MODE_ERTM: |
| 1946 | rfc.mode = L2CAP_MODE_ERTM; |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1947 | rfc.txwin_size = chan->tx_win; |
| 1948 | rfc.max_transmit = chan->max_tx; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1949 | rfc.retrans_timeout = 0; |
| 1950 | rfc.monitor_timeout = 0; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1951 | 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] | 1952 | if (L2CAP_DEFAULT_MAX_PDU_SIZE > chan->conn->mtu - 10) |
| 1953 | rfc.max_pdu_size = cpu_to_le16(chan->conn->mtu - 10); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1954 | |
Gustavo F. Padovan | 6340650 | 2010-08-03 23:49:29 -0300 | [diff] [blame] | 1955 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
| 1956 | (unsigned long) &rfc); |
| 1957 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1958 | if (!(chan->conn->feat_mask & L2CAP_FEAT_FCS)) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1959 | break; |
| 1960 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1961 | if (chan->fcs == L2CAP_FCS_NONE || |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 1962 | test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1963 | chan->fcs = L2CAP_FCS_NONE; |
| 1964 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, chan->fcs); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1965 | } |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1966 | break; |
| 1967 | |
| 1968 | case L2CAP_MODE_STREAMING: |
| 1969 | rfc.mode = L2CAP_MODE_STREAMING; |
| 1970 | rfc.txwin_size = 0; |
| 1971 | rfc.max_transmit = 0; |
| 1972 | rfc.retrans_timeout = 0; |
| 1973 | rfc.monitor_timeout = 0; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1974 | 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] | 1975 | if (L2CAP_DEFAULT_MAX_PDU_SIZE > chan->conn->mtu - 10) |
| 1976 | rfc.max_pdu_size = cpu_to_le16(chan->conn->mtu - 10); |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 1977 | |
Gustavo F. Padovan | 6340650 | 2010-08-03 23:49:29 -0300 | [diff] [blame] | 1978 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc), |
| 1979 | (unsigned long) &rfc); |
| 1980 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 1981 | if (!(chan->conn->feat_mask & L2CAP_FEAT_FCS)) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1982 | break; |
| 1983 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1984 | if (chan->fcs == L2CAP_FCS_NONE || |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 1985 | test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 1986 | chan->fcs = L2CAP_FCS_NONE; |
| 1987 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, chan->fcs); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1988 | } |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 1989 | break; |
| 1990 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1991 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 1992 | req->dcid = cpu_to_le16(chan->dcid); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1993 | req->flags = cpu_to_le16(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1994 | |
| 1995 | return ptr - data; |
| 1996 | } |
| 1997 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 1998 | static int l2cap_parse_conf_req(struct l2cap_chan *chan, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1999 | { |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2000 | struct l2cap_conf_rsp *rsp = data; |
| 2001 | void *ptr = rsp->data; |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2002 | void *req = chan->conf_req; |
| 2003 | int len = chan->conf_len; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2004 | int type, hint, olen; |
| 2005 | unsigned long val; |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2006 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 2007 | u16 mtu = L2CAP_DEFAULT_MTU; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2008 | u16 result = L2CAP_CONF_SUCCESS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2009 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2010 | BT_DBG("chan %p", chan); |
Marcel Holtmann | 820ae1b | 2006-11-18 22:15:00 +0100 | [diff] [blame] | 2011 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2012 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 2013 | len -= l2cap_get_conf_opt(&req, &type, &olen, &val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2014 | |
Gustavo F. Padovan | 589d274 | 2009-04-20 01:31:07 -0300 | [diff] [blame] | 2015 | hint = type & L2CAP_CONF_HINT; |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 2016 | type &= L2CAP_CONF_MASK; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2017 | |
| 2018 | switch (type) { |
| 2019 | case L2CAP_CONF_MTU: |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 2020 | mtu = val; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2021 | break; |
| 2022 | |
| 2023 | case L2CAP_CONF_FLUSH_TO: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2024 | chan->flush_to = val; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2025 | break; |
| 2026 | |
| 2027 | case L2CAP_CONF_QOS: |
| 2028 | break; |
| 2029 | |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2030 | case L2CAP_CONF_RFC: |
| 2031 | if (olen == sizeof(rfc)) |
| 2032 | memcpy(&rfc, (void *) val, olen); |
| 2033 | break; |
| 2034 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2035 | case L2CAP_CONF_FCS: |
| 2036 | if (val == L2CAP_FCS_NONE) |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2037 | set_bit(CONF_NO_FCS_RECV, &chan->conf_state); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2038 | |
| 2039 | break; |
| 2040 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2041 | default: |
| 2042 | if (hint) |
| 2043 | break; |
| 2044 | |
| 2045 | result = L2CAP_CONF_UNKNOWN; |
| 2046 | *((u8 *) ptr++) = type; |
| 2047 | break; |
| 2048 | } |
| 2049 | } |
| 2050 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2051 | if (chan->num_conf_rsp || chan->num_conf_req > 1) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2052 | goto done; |
| 2053 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2054 | switch (chan->mode) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2055 | case L2CAP_MODE_STREAMING: |
| 2056 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2057 | if (!test_bit(CONF_STATE2_DEVICE, &chan->conf_state)) { |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2058 | chan->mode = l2cap_select_mode(rfc.mode, |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2059 | chan->conn->feat_mask); |
Gustavo F. Padovan | 85eb53c | 2010-06-03 18:43:28 -0300 | [diff] [blame] | 2060 | break; |
| 2061 | } |
| 2062 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2063 | if (chan->mode != rfc.mode) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2064 | return -ECONNREFUSED; |
Gustavo F. Padovan | 742e519 | 2010-06-08 19:09:48 -0300 | [diff] [blame] | 2065 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2066 | break; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2067 | } |
| 2068 | |
| 2069 | done: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2070 | if (chan->mode != rfc.mode) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2071 | result = L2CAP_CONF_UNACCEPT; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2072 | rfc.mode = chan->mode; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2073 | |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2074 | if (chan->num_conf_rsp == 1) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2075 | return -ECONNREFUSED; |
| 2076 | |
| 2077 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2078 | sizeof(rfc), (unsigned long) &rfc); |
| 2079 | } |
| 2080 | |
| 2081 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2082 | if (result == L2CAP_CONF_SUCCESS) { |
| 2083 | /* Configure output options and let the other side know |
| 2084 | * which ones we don't like. */ |
| 2085 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2086 | if (mtu < L2CAP_DEFAULT_MIN_MTU) |
| 2087 | result = L2CAP_CONF_UNACCEPT; |
| 2088 | else { |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2089 | chan->omtu = mtu; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2090 | set_bit(CONF_MTU_DONE, &chan->conf_state); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2091 | } |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2092 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->omtu); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2093 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2094 | switch (rfc.mode) { |
| 2095 | case L2CAP_MODE_BASIC: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2096 | chan->fcs = L2CAP_FCS_NONE; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2097 | set_bit(CONF_MODE_DONE, &chan->conf_state); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2098 | break; |
| 2099 | |
| 2100 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 2101 | chan->remote_tx_win = rfc.txwin_size; |
| 2102 | chan->remote_max_tx = rfc.max_transmit; |
Mat Martineau | 86b1b26 | 2010-08-05 15:54:22 -0700 | [diff] [blame] | 2103 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2104 | if (le16_to_cpu(rfc.max_pdu_size) > chan->conn->mtu - 10) |
| 2105 | rfc.max_pdu_size = cpu_to_le16(chan->conn->mtu - 10); |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2106 | |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 2107 | chan->remote_mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2108 | |
Gustavo F. Padovan | 10467e9 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2109 | rfc.retrans_timeout = |
| 2110 | le16_to_cpu(L2CAP_DEFAULT_RETRANS_TO); |
| 2111 | rfc.monitor_timeout = |
| 2112 | le16_to_cpu(L2CAP_DEFAULT_MONITOR_TO); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2113 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2114 | set_bit(CONF_MODE_DONE, &chan->conf_state); |
Gustavo F. Padovan | 68ae663 | 2009-10-17 21:41:01 -0300 | [diff] [blame] | 2115 | |
| 2116 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2117 | sizeof(rfc), (unsigned long) &rfc); |
| 2118 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2119 | break; |
| 2120 | |
| 2121 | case L2CAP_MODE_STREAMING: |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2122 | if (le16_to_cpu(rfc.max_pdu_size) > chan->conn->mtu - 10) |
| 2123 | rfc.max_pdu_size = cpu_to_le16(chan->conn->mtu - 10); |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2124 | |
Gustavo F. Padovan | 2c03a7a | 2011-03-25 20:15:28 -0300 | [diff] [blame] | 2125 | chan->remote_mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2126 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2127 | set_bit(CONF_MODE_DONE, &chan->conf_state); |
Gustavo F. Padovan | 68ae663 | 2009-10-17 21:41:01 -0300 | [diff] [blame] | 2128 | |
| 2129 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2130 | sizeof(rfc), (unsigned long) &rfc); |
| 2131 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2132 | break; |
| 2133 | |
| 2134 | default: |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2135 | result = L2CAP_CONF_UNACCEPT; |
| 2136 | |
| 2137 | memset(&rfc, 0, sizeof(rfc)); |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2138 | rfc.mode = chan->mode; |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2139 | } |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2140 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2141 | if (result == L2CAP_CONF_SUCCESS) |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2142 | set_bit(CONF_OUTPUT_DONE, &chan->conf_state); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2143 | } |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2144 | rsp->scid = cpu_to_le16(chan->dcid); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2145 | rsp->result = cpu_to_le16(result); |
| 2146 | rsp->flags = cpu_to_le16(0x0000); |
| 2147 | |
| 2148 | return ptr - data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2149 | } |
| 2150 | |
Gustavo F. Padovan | b445003 | 2011-04-12 18:15:09 -0300 | [diff] [blame] | 2151 | 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] | 2152 | { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2153 | struct l2cap_conf_req *req = data; |
| 2154 | void *ptr = req->data; |
| 2155 | int type, olen; |
| 2156 | unsigned long val; |
| 2157 | struct l2cap_conf_rfc rfc; |
| 2158 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2159 | 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] | 2160 | |
| 2161 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 2162 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); |
| 2163 | |
| 2164 | switch (type) { |
| 2165 | case L2CAP_CONF_MTU: |
| 2166 | if (val < L2CAP_DEFAULT_MIN_MTU) { |
| 2167 | *result = L2CAP_CONF_UNACCEPT; |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2168 | chan->imtu = L2CAP_DEFAULT_MIN_MTU; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2169 | } else |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2170 | chan->imtu = val; |
| 2171 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2172 | break; |
| 2173 | |
| 2174 | case L2CAP_CONF_FLUSH_TO: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2175 | chan->flush_to = val; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2176 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2177 | 2, chan->flush_to); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2178 | break; |
| 2179 | |
| 2180 | case L2CAP_CONF_RFC: |
| 2181 | if (olen == sizeof(rfc)) |
| 2182 | memcpy(&rfc, (void *)val, olen); |
| 2183 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2184 | if (test_bit(CONF_STATE2_DEVICE, &chan->conf_state) && |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2185 | rfc.mode != chan->mode) |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2186 | return -ECONNREFUSED; |
| 2187 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2188 | chan->fcs = 0; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2189 | |
| 2190 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2191 | sizeof(rfc), (unsigned long) &rfc); |
| 2192 | break; |
| 2193 | } |
| 2194 | } |
| 2195 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2196 | if (chan->mode == L2CAP_MODE_BASIC && chan->mode != rfc.mode) |
Gustavo F. Padovan | 6c2ea7a | 2010-06-08 20:08:49 -0300 | [diff] [blame] | 2197 | return -ECONNREFUSED; |
| 2198 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2199 | chan->mode = rfc.mode; |
Gustavo F. Padovan | 6c2ea7a | 2010-06-08 20:08:49 -0300 | [diff] [blame] | 2200 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2201 | if (*result == L2CAP_CONF_SUCCESS) { |
| 2202 | switch (rfc.mode) { |
| 2203 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2204 | chan->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); |
| 2205 | chan->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); |
| 2206 | chan->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2207 | break; |
| 2208 | case L2CAP_MODE_STREAMING: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2209 | chan->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2210 | } |
| 2211 | } |
| 2212 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2213 | req->dcid = cpu_to_le16(chan->dcid); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2214 | req->flags = cpu_to_le16(0x0000); |
| 2215 | |
| 2216 | return ptr - data; |
| 2217 | } |
| 2218 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2219 | 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] | 2220 | { |
| 2221 | struct l2cap_conf_rsp *rsp = data; |
| 2222 | void *ptr = rsp->data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2223 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2224 | BT_DBG("chan %p", chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2225 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2226 | rsp->scid = cpu_to_le16(chan->dcid); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2227 | rsp->result = cpu_to_le16(result); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2228 | rsp->flags = cpu_to_le16(flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2229 | |
| 2230 | return ptr - data; |
| 2231 | } |
| 2232 | |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2233 | void __l2cap_connect_rsp_defer(struct l2cap_chan *chan) |
Gustavo F. Padovan | 710f9b0a | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2234 | { |
| 2235 | struct l2cap_conn_rsp rsp; |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 2236 | struct l2cap_conn *conn = chan->conn; |
Gustavo F. Padovan | 710f9b0a | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2237 | u8 buf[128]; |
| 2238 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2239 | rsp.scid = cpu_to_le16(chan->dcid); |
| 2240 | rsp.dcid = cpu_to_le16(chan->scid); |
Gustavo F. Padovan | 710f9b0a | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2241 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); |
| 2242 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 2243 | l2cap_send_cmd(conn, chan->ident, |
| 2244 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
| 2245 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2246 | if (test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) |
Gustavo F. Padovan | 710f9b0a | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2247 | return; |
| 2248 | |
Gustavo F. Padovan | 710f9b0a | 2011-03-25 14:30:37 -0300 | [diff] [blame] | 2249 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
| 2250 | l2cap_build_conf_req(chan, buf), buf); |
| 2251 | chan->num_conf_req++; |
| 2252 | } |
| 2253 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2254 | 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] | 2255 | { |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2256 | int type, olen; |
| 2257 | unsigned long val; |
| 2258 | struct l2cap_conf_rfc rfc; |
| 2259 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2260 | BT_DBG("chan %p, rsp %p, len %d", chan, rsp, len); |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2261 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2262 | if ((chan->mode != L2CAP_MODE_ERTM) && (chan->mode != L2CAP_MODE_STREAMING)) |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2263 | return; |
| 2264 | |
| 2265 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 2266 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); |
| 2267 | |
| 2268 | switch (type) { |
| 2269 | case L2CAP_CONF_RFC: |
| 2270 | if (olen == sizeof(rfc)) |
| 2271 | memcpy(&rfc, (void *)val, olen); |
| 2272 | goto done; |
| 2273 | } |
| 2274 | } |
| 2275 | |
| 2276 | done: |
| 2277 | switch (rfc.mode) { |
| 2278 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2279 | chan->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); |
| 2280 | chan->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); |
| 2281 | chan->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2282 | break; |
| 2283 | case L2CAP_MODE_STREAMING: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2284 | chan->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2285 | } |
| 2286 | } |
| 2287 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2288 | static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2289 | { |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 2290 | struct l2cap_cmd_rej_unk *rej = (struct l2cap_cmd_rej_unk *) data; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2291 | |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 2292 | if (rej->reason != L2CAP_REJ_NOT_UNDERSTOOD) |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2293 | return 0; |
| 2294 | |
| 2295 | if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) && |
| 2296 | cmd->ident == conn->info_ident) { |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2297 | del_timer(&conn->info_timer); |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2298 | |
| 2299 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 2300 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2301 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2302 | l2cap_conn_start(conn); |
| 2303 | } |
| 2304 | |
| 2305 | return 0; |
| 2306 | } |
| 2307 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2308 | static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2309 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2310 | struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; |
| 2311 | struct l2cap_conn_rsp rsp; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 2312 | struct l2cap_chan *chan = NULL, *pchan; |
Nathan Holstein | d793fe8 | 2010-10-15 11:54:02 -0400 | [diff] [blame] | 2313 | struct sock *parent, *sk = NULL; |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2314 | int result, status = L2CAP_CS_NO_INFO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2315 | |
| 2316 | u16 dcid = 0, scid = __le16_to_cpu(req->scid); |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2317 | __le16 psm = req->psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2318 | |
| 2319 | BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid); |
| 2320 | |
| 2321 | /* Check if we have socket listening on psm */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 2322 | pchan = l2cap_global_chan_by_psm(BT_LISTEN, psm, conn->src); |
| 2323 | if (!pchan) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2324 | result = L2CAP_CR_BAD_PSM; |
| 2325 | goto sendresp; |
| 2326 | } |
| 2327 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 2328 | parent = pchan->sk; |
| 2329 | |
Gustavo F. Padovan | e0f0cb5 | 2010-11-01 18:43:53 +0000 | [diff] [blame] | 2330 | bh_lock_sock(parent); |
| 2331 | |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2332 | /* Check if the ACL is secure enough (if not SDP) */ |
| 2333 | if (psm != cpu_to_le16(0x0001) && |
| 2334 | !hci_conn_check_link_mode(conn->hcon)) { |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 2335 | conn->disc_reason = 0x05; |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2336 | result = L2CAP_CR_SEC_BLOCK; |
| 2337 | goto response; |
| 2338 | } |
| 2339 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2340 | result = L2CAP_CR_NO_MEM; |
| 2341 | |
| 2342 | /* Check for backlog size */ |
| 2343 | if (sk_acceptq_is_full(parent)) { |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 2344 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2345 | goto response; |
| 2346 | } |
| 2347 | |
Gustavo F. Padovan | 80808e4 | 2011-05-16 17:24:37 -0300 | [diff] [blame] | 2348 | chan = pchan->ops->new_connection(pchan->data); |
| 2349 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2350 | goto response; |
| 2351 | |
Gustavo F. Padovan | 80808e4 | 2011-05-16 17:24:37 -0300 | [diff] [blame] | 2352 | sk = chan->sk; |
| 2353 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2354 | write_lock_bh(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2355 | |
| 2356 | /* Check if we already have channel with that dcid */ |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2357 | if (__l2cap_get_chan_by_dcid(conn, scid)) { |
| 2358 | write_unlock_bh(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2359 | sock_set_flag(sk, SOCK_ZAPPED); |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 2360 | chan->ops->close(chan->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2361 | goto response; |
| 2362 | } |
| 2363 | |
| 2364 | hci_conn_hold(conn->hcon); |
| 2365 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2366 | bacpy(&bt_sk(sk)->src, conn->src); |
| 2367 | bacpy(&bt_sk(sk)->dst, conn->dst); |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2368 | chan->psm = psm; |
| 2369 | chan->dcid = scid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2370 | |
Gustavo F. Padovan | d101024 | 2011-03-25 00:39:48 -0300 | [diff] [blame] | 2371 | bt_accept_enqueue(parent, sk); |
| 2372 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2373 | __l2cap_chan_add(conn, chan); |
| 2374 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2375 | dcid = chan->scid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2376 | |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 2377 | __set_chan_timer(chan, sk->sk_sndtimeo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2378 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 2379 | chan->ident = cmd->ident; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2380 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2381 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 2382 | if (l2cap_check_security(chan)) { |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 2383 | if (bt_sk(sk)->defer_setup) { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2384 | l2cap_state_change(chan, BT_CONNECT2); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 2385 | result = L2CAP_CR_PEND; |
| 2386 | status = L2CAP_CS_AUTHOR_PEND; |
| 2387 | parent->sk_data_ready(parent, 0); |
| 2388 | } else { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2389 | l2cap_state_change(chan, BT_CONFIG); |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 2390 | result = L2CAP_CR_SUCCESS; |
| 2391 | status = L2CAP_CS_NO_INFO; |
| 2392 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2393 | } else { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2394 | l2cap_state_change(chan, BT_CONNECT2); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2395 | result = L2CAP_CR_PEND; |
| 2396 | status = L2CAP_CS_AUTHEN_PEND; |
| 2397 | } |
| 2398 | } else { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2399 | l2cap_state_change(chan, BT_CONNECT2); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2400 | result = L2CAP_CR_PEND; |
| 2401 | status = L2CAP_CS_NO_INFO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2402 | } |
| 2403 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2404 | write_unlock_bh(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2405 | |
| 2406 | response: |
| 2407 | bh_unlock_sock(parent); |
| 2408 | |
| 2409 | sendresp: |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2410 | rsp.scid = cpu_to_le16(scid); |
| 2411 | rsp.dcid = cpu_to_le16(dcid); |
| 2412 | rsp.result = cpu_to_le16(result); |
| 2413 | rsp.status = cpu_to_le16(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2414 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2415 | |
| 2416 | if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) { |
| 2417 | struct l2cap_info_req info; |
| 2418 | info.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 2419 | |
| 2420 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; |
| 2421 | conn->info_ident = l2cap_get_ident(conn); |
| 2422 | |
| 2423 | mod_timer(&conn->info_timer, jiffies + |
| 2424 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); |
| 2425 | |
| 2426 | l2cap_send_cmd(conn, conn->info_ident, |
| 2427 | L2CAP_INFO_REQ, sizeof(info), &info); |
| 2428 | } |
| 2429 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2430 | if (chan && !test_bit(CONF_REQ_SENT, &chan->conf_state) && |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 2431 | result == L2CAP_CR_SUCCESS) { |
| 2432 | u8 buf[128]; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2433 | set_bit(CONF_REQ_SENT, &chan->conf_state); |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 2434 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2435 | l2cap_build_conf_req(chan, buf), buf); |
| 2436 | chan->num_conf_req++; |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 2437 | } |
| 2438 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2439 | return 0; |
| 2440 | } |
| 2441 | |
| 2442 | static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2443 | { |
| 2444 | struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; |
| 2445 | u16 scid, dcid, result, status; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2446 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2447 | struct sock *sk; |
| 2448 | u8 req[128]; |
| 2449 | |
| 2450 | scid = __le16_to_cpu(rsp->scid); |
| 2451 | dcid = __le16_to_cpu(rsp->dcid); |
| 2452 | result = __le16_to_cpu(rsp->result); |
| 2453 | status = __le16_to_cpu(rsp->status); |
| 2454 | |
| 2455 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid, scid, result, status); |
| 2456 | |
| 2457 | if (scid) { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2458 | chan = l2cap_get_chan_by_scid(conn, scid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2459 | if (!chan) |
João Paulo Rechi Vita | 57d3b22 | 2010-06-22 13:56:26 -0300 | [diff] [blame] | 2460 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2461 | } else { |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2462 | chan = l2cap_get_chan_by_ident(conn, cmd->ident); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2463 | if (!chan) |
João Paulo Rechi Vita | 57d3b22 | 2010-06-22 13:56:26 -0300 | [diff] [blame] | 2464 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2465 | } |
| 2466 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2467 | sk = chan->sk; |
| 2468 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2469 | switch (result) { |
| 2470 | case L2CAP_CR_SUCCESS: |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2471 | l2cap_state_change(chan, BT_CONFIG); |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 2472 | chan->ident = 0; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2473 | chan->dcid = dcid; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2474 | clear_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Marcel Holtmann | 6a8d301 | 2009-02-06 23:56:36 +0100 | [diff] [blame] | 2475 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2476 | if (test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) |
Gustavo F. Padovan | e9aeb2d | 2010-07-08 20:08:18 -0300 | [diff] [blame] | 2477 | break; |
| 2478 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2479 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2480 | l2cap_build_conf_req(chan, req), req); |
| 2481 | chan->num_conf_req++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2482 | break; |
| 2483 | |
| 2484 | case L2CAP_CR_PEND: |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2485 | set_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2486 | break; |
| 2487 | |
| 2488 | default: |
Andrei Emeltchenko | a49184c | 2010-11-03 12:32:44 +0200 | [diff] [blame] | 2489 | /* don't delete l2cap channel if sk is owned by user */ |
| 2490 | if (sock_owned_by_user(sk)) { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2491 | l2cap_state_change(chan, BT_DISCONN); |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 2492 | __clear_chan_timer(chan); |
| 2493 | __set_chan_timer(chan, HZ / 5); |
Andrei Emeltchenko | a49184c | 2010-11-03 12:32:44 +0200 | [diff] [blame] | 2494 | break; |
| 2495 | } |
| 2496 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2497 | l2cap_chan_del(chan, ECONNREFUSED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2498 | break; |
| 2499 | } |
| 2500 | |
| 2501 | bh_unlock_sock(sk); |
| 2502 | return 0; |
| 2503 | } |
| 2504 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2505 | static inline void set_default_fcs(struct l2cap_chan *chan) |
Mat Martineau | 8c462b6 | 2010-08-24 15:35:42 -0700 | [diff] [blame] | 2506 | { |
| 2507 | /* FCS is enabled only in ERTM or streaming mode, if one or both |
| 2508 | * sides request it. |
| 2509 | */ |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2510 | if (chan->mode != L2CAP_MODE_ERTM && chan->mode != L2CAP_MODE_STREAMING) |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2511 | chan->fcs = L2CAP_FCS_NONE; |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2512 | else if (!test_bit(CONF_NO_FCS_RECV, &chan->conf_state)) |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2513 | chan->fcs = L2CAP_FCS_CRC16; |
Mat Martineau | 8c462b6 | 2010-08-24 15:35:42 -0700 | [diff] [blame] | 2514 | } |
| 2515 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 2516 | 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] | 2517 | { |
| 2518 | struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; |
| 2519 | u16 dcid, flags; |
| 2520 | u8 rsp[64]; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2521 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2522 | struct sock *sk; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2523 | int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2524 | |
| 2525 | dcid = __le16_to_cpu(req->dcid); |
| 2526 | flags = __le16_to_cpu(req->flags); |
| 2527 | |
| 2528 | BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); |
| 2529 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2530 | chan = l2cap_get_chan_by_scid(conn, dcid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2531 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2532 | return -ENOENT; |
| 2533 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2534 | sk = chan->sk; |
| 2535 | |
David S. Miller | 033b114 | 2011-07-21 13:38:42 -0700 | [diff] [blame] | 2536 | if (chan->state != BT_CONFIG && chan->state != BT_CONNECT2) { |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 2537 | struct l2cap_cmd_rej_cid rej; |
Gustavo F. Padovan | df6bd74 | 2010-06-14 02:26:15 -0300 | [diff] [blame] | 2538 | |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 2539 | rej.reason = cpu_to_le16(L2CAP_REJ_INVALID_CID); |
| 2540 | rej.scid = cpu_to_le16(chan->scid); |
| 2541 | rej.dcid = cpu_to_le16(chan->dcid); |
| 2542 | |
Gustavo F. Padovan | df6bd74 | 2010-06-14 02:26:15 -0300 | [diff] [blame] | 2543 | l2cap_send_cmd(conn, cmd->ident, L2CAP_COMMAND_REJ, |
| 2544 | sizeof(rej), &rej); |
Marcel Holtmann | 354f60a | 2006-11-18 22:15:20 +0100 | [diff] [blame] | 2545 | goto unlock; |
Gustavo F. Padovan | df6bd74 | 2010-06-14 02:26:15 -0300 | [diff] [blame] | 2546 | } |
Marcel Holtmann | 354f60a | 2006-11-18 22:15:20 +0100 | [diff] [blame] | 2547 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2548 | /* Reject if config buffer is too small. */ |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 2549 | len = cmd_len - sizeof(*req); |
Dan Rosenberg | 7ac2881 | 2011-06-24 08:38:05 -0400 | [diff] [blame] | 2550 | if (len < 0 || chan->conf_len + len > sizeof(chan->conf_req)) { |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2551 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2552 | l2cap_build_conf_rsp(chan, rsp, |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2553 | L2CAP_CONF_REJECT, flags), rsp); |
| 2554 | goto unlock; |
| 2555 | } |
| 2556 | |
| 2557 | /* Store config. */ |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2558 | memcpy(chan->conf_req + chan->conf_len, req->data, len); |
| 2559 | chan->conf_len += len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2560 | |
| 2561 | if (flags & 0x0001) { |
| 2562 | /* Incomplete config. Send empty response. */ |
| 2563 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2564 | l2cap_build_conf_rsp(chan, rsp, |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2565 | L2CAP_CONF_SUCCESS, 0x0001), rsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2566 | goto unlock; |
| 2567 | } |
| 2568 | |
| 2569 | /* Complete config. */ |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2570 | len = l2cap_parse_conf_req(chan, rsp); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2571 | if (len < 0) { |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 2572 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2573 | goto unlock; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2574 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2575 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2576 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2577 | chan->num_conf_rsp++; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2578 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2579 | /* Reset config buffer. */ |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2580 | chan->conf_len = 0; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2581 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2582 | if (!test_bit(CONF_OUTPUT_DONE, &chan->conf_state)) |
Marcel Holtmann | 876d948 | 2007-10-20 13:35:42 +0200 | [diff] [blame] | 2583 | goto unlock; |
| 2584 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2585 | if (test_bit(CONF_INPUT_DONE, &chan->conf_state)) { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2586 | set_default_fcs(chan); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2587 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2588 | l2cap_state_change(chan, BT_CONNECTED); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2589 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 2590 | chan->next_tx_seq = 0; |
| 2591 | chan->expected_tx_seq = 0; |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 2592 | skb_queue_head_init(&chan->tx_q); |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2593 | if (chan->mode == L2CAP_MODE_ERTM) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 2594 | l2cap_ertm_init(chan); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2595 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2596 | l2cap_chan_ready(sk); |
Marcel Holtmann | 876d948 | 2007-10-20 13:35:42 +0200 | [diff] [blame] | 2597 | goto unlock; |
| 2598 | } |
| 2599 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2600 | if (!test_and_set_bit(CONF_REQ_SENT, &chan->conf_state)) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2601 | u8 buf[64]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2602 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2603 | l2cap_build_conf_req(chan, buf), buf); |
| 2604 | chan->num_conf_req++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2605 | } |
| 2606 | |
| 2607 | unlock: |
| 2608 | bh_unlock_sock(sk); |
| 2609 | return 0; |
| 2610 | } |
| 2611 | |
| 2612 | static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2613 | { |
| 2614 | struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; |
| 2615 | u16 scid, flags, result; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2616 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2617 | struct sock *sk; |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2618 | int len = cmd->len - sizeof(*rsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2619 | |
| 2620 | scid = __le16_to_cpu(rsp->scid); |
| 2621 | flags = __le16_to_cpu(rsp->flags); |
| 2622 | result = __le16_to_cpu(rsp->result); |
| 2623 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2624 | BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x", |
| 2625 | scid, flags, result); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2626 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2627 | chan = l2cap_get_chan_by_scid(conn, scid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2628 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2629 | return 0; |
| 2630 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2631 | sk = chan->sk; |
| 2632 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2633 | switch (result) { |
| 2634 | case L2CAP_CONF_SUCCESS: |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2635 | l2cap_conf_rfc_get(chan, rsp->data, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2636 | break; |
| 2637 | |
| 2638 | case L2CAP_CONF_UNACCEPT: |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2639 | if (chan->num_conf_rsp <= L2CAP_CONF_MAX_CONF_RSP) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2640 | char req[64]; |
| 2641 | |
Andrei Emeltchenko | c2c77ec | 2010-03-19 10:26:28 +0200 | [diff] [blame] | 2642 | if (len > sizeof(req) - sizeof(struct l2cap_conf_req)) { |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 2643 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
Andrei Emeltchenko | c2c77ec | 2010-03-19 10:26:28 +0200 | [diff] [blame] | 2644 | goto done; |
| 2645 | } |
| 2646 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2647 | /* throw out any old stored conf requests */ |
| 2648 | result = L2CAP_CONF_SUCCESS; |
Gustavo F. Padovan | b445003 | 2011-04-12 18:15:09 -0300 | [diff] [blame] | 2649 | len = l2cap_parse_conf_rsp(chan, rsp->data, len, |
| 2650 | req, &result); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2651 | if (len < 0) { |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 2652 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2653 | goto done; |
| 2654 | } |
| 2655 | |
| 2656 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
| 2657 | L2CAP_CONF_REQ, len, req); |
Gustavo F. Padovan | 73ffa90 | 2011-03-25 14:16:54 -0300 | [diff] [blame] | 2658 | chan->num_conf_req++; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2659 | if (result != L2CAP_CONF_SUCCESS) |
| 2660 | goto done; |
| 2661 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2662 | } |
| 2663 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 2664 | default: |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 2665 | sk->sk_err = ECONNRESET; |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 2666 | __set_chan_timer(chan, HZ * 5); |
Gustavo F. Padovan | e92c8e7 | 2011-04-01 00:53:45 -0300 | [diff] [blame] | 2667 | l2cap_send_disconn_req(conn, chan, ECONNRESET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2668 | goto done; |
| 2669 | } |
| 2670 | |
| 2671 | if (flags & 0x01) |
| 2672 | goto done; |
| 2673 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2674 | set_bit(CONF_INPUT_DONE, &chan->conf_state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2675 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 2676 | if (test_bit(CONF_OUTPUT_DONE, &chan->conf_state)) { |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 2677 | set_default_fcs(chan); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2678 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2679 | l2cap_state_change(chan, BT_CONNECTED); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 2680 | chan->next_tx_seq = 0; |
| 2681 | chan->expected_tx_seq = 0; |
Gustavo F. Padovan | 58d35f8 | 2011-04-04 16:16:44 -0300 | [diff] [blame] | 2682 | skb_queue_head_init(&chan->tx_q); |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 2683 | if (chan->mode == L2CAP_MODE_ERTM) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 2684 | l2cap_ertm_init(chan); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2685 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2686 | l2cap_chan_ready(sk); |
| 2687 | } |
| 2688 | |
| 2689 | done: |
| 2690 | bh_unlock_sock(sk); |
| 2691 | return 0; |
| 2692 | } |
| 2693 | |
| 2694 | static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2695 | { |
| 2696 | struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; |
| 2697 | struct l2cap_disconn_rsp rsp; |
| 2698 | u16 dcid, scid; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2699 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2700 | struct sock *sk; |
| 2701 | |
| 2702 | scid = __le16_to_cpu(req->scid); |
| 2703 | dcid = __le16_to_cpu(req->dcid); |
| 2704 | |
| 2705 | BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); |
| 2706 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2707 | chan = l2cap_get_chan_by_scid(conn, dcid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2708 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2709 | return 0; |
| 2710 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2711 | sk = chan->sk; |
| 2712 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 2713 | rsp.dcid = cpu_to_le16(chan->scid); |
| 2714 | rsp.scid = cpu_to_le16(chan->dcid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2715 | l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); |
| 2716 | |
| 2717 | sk->sk_shutdown = SHUTDOWN_MASK; |
| 2718 | |
Andrei Emeltchenko | a49184c | 2010-11-03 12:32:44 +0200 | [diff] [blame] | 2719 | /* don't delete l2cap channel if sk is owned by user */ |
| 2720 | if (sock_owned_by_user(sk)) { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2721 | l2cap_state_change(chan, BT_DISCONN); |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 2722 | __clear_chan_timer(chan); |
| 2723 | __set_chan_timer(chan, HZ / 5); |
Andrei Emeltchenko | a49184c | 2010-11-03 12:32:44 +0200 | [diff] [blame] | 2724 | bh_unlock_sock(sk); |
| 2725 | return 0; |
| 2726 | } |
| 2727 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2728 | l2cap_chan_del(chan, ECONNRESET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2729 | bh_unlock_sock(sk); |
| 2730 | |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 2731 | chan->ops->close(chan->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2732 | return 0; |
| 2733 | } |
| 2734 | |
| 2735 | static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2736 | { |
| 2737 | struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; |
| 2738 | u16 dcid, scid; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2739 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2740 | struct sock *sk; |
| 2741 | |
| 2742 | scid = __le16_to_cpu(rsp->scid); |
| 2743 | dcid = __le16_to_cpu(rsp->dcid); |
| 2744 | |
| 2745 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); |
| 2746 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 2747 | chan = l2cap_get_chan_by_scid(conn, scid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2748 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2749 | return 0; |
| 2750 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2751 | sk = chan->sk; |
| 2752 | |
Andrei Emeltchenko | a49184c | 2010-11-03 12:32:44 +0200 | [diff] [blame] | 2753 | /* don't delete l2cap channel if sk is owned by user */ |
| 2754 | if (sock_owned_by_user(sk)) { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 2755 | l2cap_state_change(chan,BT_DISCONN); |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 2756 | __clear_chan_timer(chan); |
| 2757 | __set_chan_timer(chan, HZ / 5); |
Andrei Emeltchenko | a49184c | 2010-11-03 12:32:44 +0200 | [diff] [blame] | 2758 | bh_unlock_sock(sk); |
| 2759 | return 0; |
| 2760 | } |
| 2761 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 2762 | l2cap_chan_del(chan, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2763 | bh_unlock_sock(sk); |
| 2764 | |
Gustavo F. Padovan | ba3bd0e | 2011-05-16 18:23:24 -0300 | [diff] [blame] | 2765 | chan->ops->close(chan->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2766 | return 0; |
| 2767 | } |
| 2768 | |
| 2769 | static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2770 | { |
| 2771 | struct l2cap_info_req *req = (struct l2cap_info_req *) data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2772 | u16 type; |
| 2773 | |
| 2774 | type = __le16_to_cpu(req->type); |
| 2775 | |
| 2776 | BT_DBG("type 0x%4.4x", type); |
| 2777 | |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 2778 | if (type == L2CAP_IT_FEAT_MASK) { |
| 2779 | u8 buf[8]; |
Marcel Holtmann | 44dd46d | 2009-05-02 19:09:01 -0700 | [diff] [blame] | 2780 | u32 feat_mask = l2cap_feat_mask; |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 2781 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
| 2782 | rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 2783 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); |
Gustavo F. Padovan | d1c4a17 | 2010-07-18 16:25:54 -0300 | [diff] [blame] | 2784 | if (!disable_ertm) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2785 | feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING |
| 2786 | | L2CAP_FEAT_FCS; |
Andrei Emeltchenko | a5fd6f3 | 2011-09-16 16:26:32 +0300 | [diff] [blame] | 2787 | if (enable_hs) |
| 2788 | feat_mask |= L2CAP_FEAT_EXT_FLOW; |
| 2789 | |
Gustavo F. Padovan | 1b7bf4e | 2009-08-24 00:45:20 -0300 | [diff] [blame] | 2790 | put_unaligned_le32(feat_mask, rsp->data); |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 2791 | l2cap_send_cmd(conn, cmd->ident, |
| 2792 | L2CAP_INFO_RSP, sizeof(buf), buf); |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 2793 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
| 2794 | u8 buf[12]; |
| 2795 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
| 2796 | rsp->type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); |
| 2797 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); |
| 2798 | memcpy(buf + 4, l2cap_fixed_chan, 8); |
| 2799 | l2cap_send_cmd(conn, cmd->ident, |
| 2800 | L2CAP_INFO_RSP, sizeof(buf), buf); |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 2801 | } else { |
| 2802 | struct l2cap_info_rsp rsp; |
| 2803 | rsp.type = cpu_to_le16(type); |
| 2804 | rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP); |
| 2805 | l2cap_send_cmd(conn, cmd->ident, |
| 2806 | L2CAP_INFO_RSP, sizeof(rsp), &rsp); |
| 2807 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2808 | |
| 2809 | return 0; |
| 2810 | } |
| 2811 | |
| 2812 | static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2813 | { |
| 2814 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; |
| 2815 | u16 type, result; |
| 2816 | |
| 2817 | type = __le16_to_cpu(rsp->type); |
| 2818 | result = __le16_to_cpu(rsp->result); |
| 2819 | |
| 2820 | BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); |
| 2821 | |
Andrei Emeltchenko | e90165b | 2011-03-25 11:31:41 +0200 | [diff] [blame] | 2822 | /* L2CAP Info req/rsp are unbound to channels, add extra checks */ |
| 2823 | if (cmd->ident != conn->info_ident || |
| 2824 | conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) |
| 2825 | return 0; |
| 2826 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2827 | del_timer(&conn->info_timer); |
| 2828 | |
Ville Tervo | adb08ed | 2010-08-04 09:43:33 +0300 | [diff] [blame] | 2829 | if (result != L2CAP_IR_SUCCESS) { |
| 2830 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
| 2831 | conn->info_ident = 0; |
| 2832 | |
| 2833 | l2cap_conn_start(conn); |
| 2834 | |
| 2835 | return 0; |
| 2836 | } |
| 2837 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2838 | if (type == L2CAP_IT_FEAT_MASK) { |
Harvey Harrison | 8398531 | 2008-05-02 16:25:46 -0700 | [diff] [blame] | 2839 | conn->feat_mask = get_unaligned_le32(rsp->data); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2840 | |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 2841 | if (conn->feat_mask & L2CAP_FEAT_FIXED_CHAN) { |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 2842 | struct l2cap_info_req req; |
| 2843 | req.type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); |
| 2844 | |
| 2845 | conn->info_ident = l2cap_get_ident(conn); |
| 2846 | |
| 2847 | l2cap_send_cmd(conn, conn->info_ident, |
| 2848 | L2CAP_INFO_REQ, sizeof(req), &req); |
| 2849 | } else { |
| 2850 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
| 2851 | conn->info_ident = 0; |
| 2852 | |
| 2853 | l2cap_conn_start(conn); |
| 2854 | } |
| 2855 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2856 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 2857 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2858 | |
| 2859 | l2cap_conn_start(conn); |
| 2860 | } |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2861 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2862 | return 0; |
| 2863 | } |
| 2864 | |
Gustavo F. Padovan | e2174ca | 2011-02-17 19:16:55 -0300 | [diff] [blame] | 2865 | 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] | 2866 | u16 to_multiplier) |
| 2867 | { |
| 2868 | u16 max_latency; |
| 2869 | |
| 2870 | if (min > max || min < 6 || max > 3200) |
| 2871 | return -EINVAL; |
| 2872 | |
| 2873 | if (to_multiplier < 10 || to_multiplier > 3200) |
| 2874 | return -EINVAL; |
| 2875 | |
| 2876 | if (max >= to_multiplier * 8) |
| 2877 | return -EINVAL; |
| 2878 | |
| 2879 | max_latency = (to_multiplier * 8 / max) - 1; |
| 2880 | if (latency > 499 || latency > max_latency) |
| 2881 | return -EINVAL; |
| 2882 | |
| 2883 | return 0; |
| 2884 | } |
| 2885 | |
| 2886 | static inline int l2cap_conn_param_update_req(struct l2cap_conn *conn, |
| 2887 | struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2888 | { |
| 2889 | struct hci_conn *hcon = conn->hcon; |
| 2890 | struct l2cap_conn_param_update_req *req; |
| 2891 | struct l2cap_conn_param_update_rsp rsp; |
| 2892 | u16 min, max, latency, to_multiplier, cmd_len; |
Claudio Takahasi | 2ce603e | 2011-02-16 20:44:53 -0200 | [diff] [blame] | 2893 | int err; |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 2894 | |
| 2895 | if (!(hcon->link_mode & HCI_LM_MASTER)) |
| 2896 | return -EINVAL; |
| 2897 | |
| 2898 | cmd_len = __le16_to_cpu(cmd->len); |
| 2899 | if (cmd_len != sizeof(struct l2cap_conn_param_update_req)) |
| 2900 | return -EPROTO; |
| 2901 | |
| 2902 | req = (struct l2cap_conn_param_update_req *) data; |
Gustavo F. Padovan | e2174ca | 2011-02-17 19:16:55 -0300 | [diff] [blame] | 2903 | min = __le16_to_cpu(req->min); |
| 2904 | max = __le16_to_cpu(req->max); |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 2905 | latency = __le16_to_cpu(req->latency); |
| 2906 | to_multiplier = __le16_to_cpu(req->to_multiplier); |
| 2907 | |
| 2908 | BT_DBG("min 0x%4.4x max 0x%4.4x latency: 0x%4.4x Timeout: 0x%4.4x", |
| 2909 | min, max, latency, to_multiplier); |
| 2910 | |
| 2911 | memset(&rsp, 0, sizeof(rsp)); |
Claudio Takahasi | 2ce603e | 2011-02-16 20:44:53 -0200 | [diff] [blame] | 2912 | |
| 2913 | err = l2cap_check_conn_param(min, max, latency, to_multiplier); |
| 2914 | if (err) |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 2915 | rsp.result = cpu_to_le16(L2CAP_CONN_PARAM_REJECTED); |
| 2916 | else |
| 2917 | rsp.result = cpu_to_le16(L2CAP_CONN_PARAM_ACCEPTED); |
| 2918 | |
| 2919 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_PARAM_UPDATE_RSP, |
| 2920 | sizeof(rsp), &rsp); |
| 2921 | |
Claudio Takahasi | 2ce603e | 2011-02-16 20:44:53 -0200 | [diff] [blame] | 2922 | if (!err) |
| 2923 | hci_le_conn_update(hcon, min, max, latency, to_multiplier); |
| 2924 | |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 2925 | return 0; |
| 2926 | } |
| 2927 | |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 2928 | static inline int l2cap_bredr_sig_cmd(struct l2cap_conn *conn, |
| 2929 | struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data) |
| 2930 | { |
| 2931 | int err = 0; |
| 2932 | |
| 2933 | switch (cmd->code) { |
| 2934 | case L2CAP_COMMAND_REJ: |
| 2935 | l2cap_command_rej(conn, cmd, data); |
| 2936 | break; |
| 2937 | |
| 2938 | case L2CAP_CONN_REQ: |
| 2939 | err = l2cap_connect_req(conn, cmd, data); |
| 2940 | break; |
| 2941 | |
| 2942 | case L2CAP_CONN_RSP: |
| 2943 | err = l2cap_connect_rsp(conn, cmd, data); |
| 2944 | break; |
| 2945 | |
| 2946 | case L2CAP_CONF_REQ: |
| 2947 | err = l2cap_config_req(conn, cmd, cmd_len, data); |
| 2948 | break; |
| 2949 | |
| 2950 | case L2CAP_CONF_RSP: |
| 2951 | err = l2cap_config_rsp(conn, cmd, data); |
| 2952 | break; |
| 2953 | |
| 2954 | case L2CAP_DISCONN_REQ: |
| 2955 | err = l2cap_disconnect_req(conn, cmd, data); |
| 2956 | break; |
| 2957 | |
| 2958 | case L2CAP_DISCONN_RSP: |
| 2959 | err = l2cap_disconnect_rsp(conn, cmd, data); |
| 2960 | break; |
| 2961 | |
| 2962 | case L2CAP_ECHO_REQ: |
| 2963 | l2cap_send_cmd(conn, cmd->ident, L2CAP_ECHO_RSP, cmd_len, data); |
| 2964 | break; |
| 2965 | |
| 2966 | case L2CAP_ECHO_RSP: |
| 2967 | break; |
| 2968 | |
| 2969 | case L2CAP_INFO_REQ: |
| 2970 | err = l2cap_information_req(conn, cmd, data); |
| 2971 | break; |
| 2972 | |
| 2973 | case L2CAP_INFO_RSP: |
| 2974 | err = l2cap_information_rsp(conn, cmd, data); |
| 2975 | break; |
| 2976 | |
| 2977 | default: |
| 2978 | BT_ERR("Unknown BR/EDR signaling command 0x%2.2x", cmd->code); |
| 2979 | err = -EINVAL; |
| 2980 | break; |
| 2981 | } |
| 2982 | |
| 2983 | return err; |
| 2984 | } |
| 2985 | |
| 2986 | static inline int l2cap_le_sig_cmd(struct l2cap_conn *conn, |
| 2987 | struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2988 | { |
| 2989 | switch (cmd->code) { |
| 2990 | case L2CAP_COMMAND_REJ: |
| 2991 | return 0; |
| 2992 | |
| 2993 | case L2CAP_CONN_PARAM_UPDATE_REQ: |
Claudio Takahasi | de73115 | 2011-02-11 19:28:55 -0200 | [diff] [blame] | 2994 | return l2cap_conn_param_update_req(conn, cmd, data); |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 2995 | |
| 2996 | case L2CAP_CONN_PARAM_UPDATE_RSP: |
| 2997 | return 0; |
| 2998 | |
| 2999 | default: |
| 3000 | BT_ERR("Unknown LE signaling command 0x%2.2x", cmd->code); |
| 3001 | return -EINVAL; |
| 3002 | } |
| 3003 | } |
| 3004 | |
| 3005 | static inline void l2cap_sig_channel(struct l2cap_conn *conn, |
| 3006 | struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3007 | { |
| 3008 | u8 *data = skb->data; |
| 3009 | int len = skb->len; |
| 3010 | struct l2cap_cmd_hdr cmd; |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 3011 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3012 | |
| 3013 | l2cap_raw_recv(conn, skb); |
| 3014 | |
| 3015 | while (len >= L2CAP_CMD_HDR_SIZE) { |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3016 | u16 cmd_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3017 | memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); |
| 3018 | data += L2CAP_CMD_HDR_SIZE; |
| 3019 | len -= L2CAP_CMD_HDR_SIZE; |
| 3020 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3021 | cmd_len = le16_to_cpu(cmd.len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3022 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3023 | 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] | 3024 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3025 | if (cmd_len > len || !cmd.ident) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3026 | BT_DBG("corrupted command"); |
| 3027 | break; |
| 3028 | } |
| 3029 | |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 3030 | if (conn->hcon->type == LE_LINK) |
| 3031 | err = l2cap_le_sig_cmd(conn, &cmd, data); |
| 3032 | else |
| 3033 | err = l2cap_bredr_sig_cmd(conn, &cmd, cmd_len, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3034 | |
| 3035 | if (err) { |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 3036 | struct l2cap_cmd_rej_unk rej; |
Gustavo F. Padovan | 2c6d1a2 | 2011-03-23 14:38:32 -0300 | [diff] [blame] | 3037 | |
| 3038 | BT_ERR("Wrong link type (%d)", err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3039 | |
| 3040 | /* FIXME: Map err to a valid reason */ |
Ilia Kolomisnky | e2fd318 | 2011-07-10 08:47:44 +0300 | [diff] [blame] | 3041 | rej.reason = cpu_to_le16(L2CAP_REJ_NOT_UNDERSTOOD); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3042 | l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); |
| 3043 | } |
| 3044 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3045 | data += cmd_len; |
| 3046 | len -= cmd_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3047 | } |
| 3048 | |
| 3049 | kfree_skb(skb); |
| 3050 | } |
| 3051 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3052 | 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] | 3053 | { |
| 3054 | u16 our_fcs, rcv_fcs; |
| 3055 | int hdr_size = L2CAP_HDR_SIZE + 2; |
| 3056 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3057 | if (chan->fcs == L2CAP_FCS_CRC16) { |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3058 | skb_trim(skb, skb->len - 2); |
| 3059 | rcv_fcs = get_unaligned_le16(skb->data + skb->len); |
| 3060 | our_fcs = crc16(0, skb->data - hdr_size, skb->len + hdr_size); |
| 3061 | |
| 3062 | if (our_fcs != rcv_fcs) |
João Paulo Rechi Vita | 7a560e5 | 2010-06-22 13:56:27 -0300 | [diff] [blame] | 3063 | return -EBADMSG; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3064 | } |
| 3065 | return 0; |
| 3066 | } |
| 3067 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3068 | 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] | 3069 | { |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3070 | u16 control = 0; |
| 3071 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3072 | chan->frames_sent = 0; |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3073 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3074 | control |= chan->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3075 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3076 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
Gustavo F. Padovan | 6498886 | 2010-05-10 14:54:14 -0300 | [diff] [blame] | 3077 | control |= L2CAP_SUPER_RCV_NOT_READY; |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3078 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3079 | set_bit(CONN_RNR_SENT, &chan->conn_state); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3080 | } |
| 3081 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3082 | if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3083 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3084 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3085 | l2cap_ertm_send(chan); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3086 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3087 | if (!test_bit(CONN_LOCAL_BUSY, &chan->conn_state) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3088 | chan->frames_sent == 0) { |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3089 | control |= L2CAP_SUPER_RCV_READY; |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3090 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3091 | } |
| 3092 | } |
| 3093 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3094 | 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] | 3095 | { |
| 3096 | struct sk_buff *next_skb; |
João Paulo Rechi Vita | bfbacc1 | 2010-05-31 18:35:44 -0300 | [diff] [blame] | 3097 | int tx_seq_offset, next_tx_seq_offset; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3098 | |
| 3099 | bt_cb(skb)->tx_seq = tx_seq; |
| 3100 | bt_cb(skb)->sar = sar; |
| 3101 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3102 | next_skb = skb_peek(&chan->srej_q); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3103 | if (!next_skb) { |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3104 | __skb_queue_tail(&chan->srej_q, skb); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3105 | return 0; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3106 | } |
| 3107 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3108 | tx_seq_offset = (tx_seq - chan->buffer_seq) % 64; |
João Paulo Rechi Vita | bfbacc1 | 2010-05-31 18:35:44 -0300 | [diff] [blame] | 3109 | if (tx_seq_offset < 0) |
| 3110 | tx_seq_offset += 64; |
| 3111 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3112 | do { |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3113 | if (bt_cb(next_skb)->tx_seq == tx_seq) |
| 3114 | return -EINVAL; |
| 3115 | |
João Paulo Rechi Vita | bfbacc1 | 2010-05-31 18:35:44 -0300 | [diff] [blame] | 3116 | next_tx_seq_offset = (bt_cb(next_skb)->tx_seq - |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3117 | chan->buffer_seq) % 64; |
João Paulo Rechi Vita | bfbacc1 | 2010-05-31 18:35:44 -0300 | [diff] [blame] | 3118 | if (next_tx_seq_offset < 0) |
| 3119 | next_tx_seq_offset += 64; |
| 3120 | |
| 3121 | if (next_tx_seq_offset > tx_seq_offset) { |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3122 | __skb_queue_before(&chan->srej_q, next_skb, skb); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3123 | return 0; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3124 | } |
| 3125 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3126 | if (skb_queue_is_last(&chan->srej_q, next_skb)) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3127 | break; |
| 3128 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3129 | } while ((next_skb = skb_queue_next(&chan->srej_q, next_skb))); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3130 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3131 | __skb_queue_tail(&chan->srej_q, skb); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3132 | |
| 3133 | return 0; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3134 | } |
| 3135 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3136 | static void append_skb_frag(struct sk_buff *skb, |
| 3137 | struct sk_buff *new_frag, struct sk_buff **last_frag) |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3138 | { |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3139 | /* skb->len reflects data in skb as well as all fragments |
| 3140 | * skb->data_len reflects only data in fragments |
| 3141 | */ |
| 3142 | if (!skb_has_frag_list(skb)) |
| 3143 | skb_shinfo(skb)->frag_list = new_frag; |
| 3144 | |
| 3145 | new_frag->next = NULL; |
| 3146 | |
| 3147 | (*last_frag)->next = new_frag; |
| 3148 | *last_frag = new_frag; |
| 3149 | |
| 3150 | skb->len += new_frag->len; |
| 3151 | skb->data_len += new_frag->len; |
| 3152 | skb->truesize += new_frag->truesize; |
| 3153 | } |
| 3154 | |
| 3155 | static int l2cap_reassemble_sdu(struct l2cap_chan *chan, struct sk_buff *skb, u16 control) |
| 3156 | { |
| 3157 | int err = -EINVAL; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3158 | |
| 3159 | switch (control & L2CAP_CTRL_SAR) { |
| 3160 | case L2CAP_SDU_UNSEGMENTED: |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3161 | if (chan->sdu) |
| 3162 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3163 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3164 | err = chan->ops->recv(chan->data, skb); |
| 3165 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3166 | |
| 3167 | case L2CAP_SDU_START: |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3168 | if (chan->sdu) |
| 3169 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3170 | |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3171 | chan->sdu_len = get_unaligned_le16(skb->data); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3172 | skb_pull(skb, 2); |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3173 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3174 | if (chan->sdu_len > chan->imtu) { |
| 3175 | err = -EMSGSIZE; |
| 3176 | break; |
| 3177 | } |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3178 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3179 | if (skb->len >= chan->sdu_len) |
| 3180 | break; |
| 3181 | |
| 3182 | chan->sdu = skb; |
| 3183 | chan->sdu_last_frag = skb; |
| 3184 | |
| 3185 | skb = NULL; |
| 3186 | err = 0; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3187 | break; |
| 3188 | |
| 3189 | case L2CAP_SDU_CONTINUE: |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3190 | if (!chan->sdu) |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3191 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3192 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3193 | append_skb_frag(chan->sdu, skb, |
| 3194 | &chan->sdu_last_frag); |
| 3195 | skb = NULL; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3196 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3197 | if (chan->sdu->len >= chan->sdu_len) |
| 3198 | break; |
Gustavo F. Padovan | 4178ba4 | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 3199 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3200 | err = 0; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3201 | break; |
| 3202 | |
| 3203 | case L2CAP_SDU_END: |
Gustavo F. Padovan | 6f61fd47 | 2011-03-25 20:09:37 -0300 | [diff] [blame] | 3204 | if (!chan->sdu) |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3205 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3206 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3207 | append_skb_frag(chan->sdu, skb, |
| 3208 | &chan->sdu_last_frag); |
| 3209 | skb = NULL; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3210 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3211 | if (chan->sdu->len != chan->sdu_len) |
| 3212 | break; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3213 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3214 | err = chan->ops->recv(chan->data, chan->sdu); |
Gustavo F. Padovan | 4178ba4 | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 3215 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3216 | if (!err) { |
| 3217 | /* Reassembly complete */ |
| 3218 | chan->sdu = NULL; |
| 3219 | chan->sdu_last_frag = NULL; |
| 3220 | chan->sdu_len = 0; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3221 | } |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3222 | break; |
| 3223 | } |
| 3224 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3225 | if (err) { |
| 3226 | kfree_skb(skb); |
| 3227 | kfree_skb(chan->sdu); |
| 3228 | chan->sdu = NULL; |
| 3229 | chan->sdu_last_frag = NULL; |
| 3230 | chan->sdu_len = 0; |
| 3231 | } |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3232 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3233 | return err; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3234 | } |
| 3235 | |
Mat Martineau | 26f880d | 2011-07-07 09:39:01 -0700 | [diff] [blame] | 3236 | static void l2cap_ertm_enter_local_busy(struct l2cap_chan *chan) |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3237 | { |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3238 | u16 control; |
| 3239 | |
Mat Martineau | 26f880d | 2011-07-07 09:39:01 -0700 | [diff] [blame] | 3240 | BT_DBG("chan %p, Enter local busy", chan); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3241 | |
Mat Martineau | 26f880d | 2011-07-07 09:39:01 -0700 | [diff] [blame] | 3242 | set_bit(CONN_LOCAL_BUSY, &chan->conn_state); |
| 3243 | |
| 3244 | control = chan->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
| 3245 | control |= L2CAP_SUPER_RCV_NOT_READY; |
| 3246 | l2cap_send_sframe(chan, control); |
| 3247 | |
| 3248 | set_bit(CONN_RNR_SENT, &chan->conn_state); |
| 3249 | |
| 3250 | __clear_ack_timer(chan); |
| 3251 | } |
| 3252 | |
| 3253 | static void l2cap_ertm_exit_local_busy(struct l2cap_chan *chan) |
| 3254 | { |
| 3255 | u16 control; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3256 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3257 | if (!test_bit(CONN_RNR_SENT, &chan->conn_state)) |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3258 | goto done; |
| 3259 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3260 | control = chan->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3261 | control |= L2CAP_SUPER_RCV_READY | L2CAP_CTRL_POLL; |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3262 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3263 | chan->retry_count = 1; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3264 | |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3265 | __clear_retrans_timer(chan); |
| 3266 | __set_monitor_timer(chan); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3267 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3268 | set_bit(CONN_WAIT_F, &chan->conn_state); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3269 | |
| 3270 | done: |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3271 | clear_bit(CONN_LOCAL_BUSY, &chan->conn_state); |
| 3272 | clear_bit(CONN_RNR_SENT, &chan->conn_state); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3273 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 3274 | BT_DBG("chan %p, Exit local busy", chan); |
Gustavo F. Padovan | 712132e | 2010-06-21 19:39:50 -0300 | [diff] [blame] | 3275 | } |
| 3276 | |
Mat Martineau | e328140 | 2011-07-07 09:39:02 -0700 | [diff] [blame] | 3277 | void l2cap_chan_busy(struct l2cap_chan *chan, int busy) |
Gustavo F. Padovan | 712132e | 2010-06-21 19:39:50 -0300 | [diff] [blame] | 3278 | { |
Mat Martineau | e328140 | 2011-07-07 09:39:02 -0700 | [diff] [blame] | 3279 | if (chan->mode == L2CAP_MODE_ERTM) { |
| 3280 | if (busy) |
| 3281 | l2cap_ertm_enter_local_busy(chan); |
| 3282 | else |
| 3283 | l2cap_ertm_exit_local_busy(chan); |
Gustavo F. Padovan | 712132e | 2010-06-21 19:39:50 -0300 | [diff] [blame] | 3284 | } |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3285 | } |
| 3286 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3287 | 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] | 3288 | { |
| 3289 | struct sk_buff *skb; |
Gustavo F. Padovan | afefdbc | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 3290 | u16 control; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3291 | |
Mat Martineau | e328140 | 2011-07-07 09:39:02 -0700 | [diff] [blame] | 3292 | while ((skb = skb_peek(&chan->srej_q)) && |
| 3293 | !test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) { |
| 3294 | int err; |
| 3295 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3296 | if (bt_cb(skb)->tx_seq != tx_seq) |
| 3297 | break; |
| 3298 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3299 | skb = skb_dequeue(&chan->srej_q); |
Gustavo F. Padovan | afefdbc | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 3300 | control = bt_cb(skb)->sar << L2CAP_CTRL_SAR_SHIFT; |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3301 | err = l2cap_reassemble_sdu(chan, skb, control); |
Mat Martineau | e328140 | 2011-07-07 09:39:02 -0700 | [diff] [blame] | 3302 | |
| 3303 | if (err < 0) { |
| 3304 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
| 3305 | break; |
| 3306 | } |
| 3307 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3308 | chan->buffer_seq_srej = |
| 3309 | (chan->buffer_seq_srej + 1) % 64; |
Gustavo F. Padovan | 8ff50ec | 2010-05-10 19:34:11 -0300 | [diff] [blame] | 3310 | tx_seq = (tx_seq + 1) % 64; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3311 | } |
| 3312 | } |
| 3313 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3314 | 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] | 3315 | { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3316 | struct srej_list *l, *tmp; |
| 3317 | u16 control; |
| 3318 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 3319 | list_for_each_entry_safe(l, tmp, &chan->srej_l, list) { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3320 | if (l->tx_seq == tx_seq) { |
| 3321 | list_del(&l->list); |
| 3322 | kfree(l); |
| 3323 | return; |
| 3324 | } |
| 3325 | control = L2CAP_SUPER_SELECT_REJECT; |
| 3326 | control |= l->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3327 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3328 | list_del(&l->list); |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 3329 | list_add_tail(&l->list, &chan->srej_l); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3330 | } |
| 3331 | } |
| 3332 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3333 | 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] | 3334 | { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3335 | struct srej_list *new; |
| 3336 | u16 control; |
| 3337 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3338 | while (tx_seq != chan->expected_tx_seq) { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3339 | control = L2CAP_SUPER_SELECT_REJECT; |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3340 | control |= chan->expected_tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3341 | l2cap_send_sframe(chan, control); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3342 | |
| 3343 | new = kzalloc(sizeof(struct srej_list), GFP_ATOMIC); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3344 | new->tx_seq = chan->expected_tx_seq; |
| 3345 | chan->expected_tx_seq = (chan->expected_tx_seq + 1) % 64; |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 3346 | list_add_tail(&new->list, &chan->srej_l); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3347 | } |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3348 | chan->expected_tx_seq = (chan->expected_tx_seq + 1) % 64; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3349 | } |
| 3350 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3351 | 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] | 3352 | { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3353 | u8 tx_seq = __get_txseq(rx_control); |
Gustavo F. Padovan | 9f121a5 | 2009-10-03 02:34:38 -0300 | [diff] [blame] | 3354 | u8 req_seq = __get_reqseq(rx_control); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3355 | u8 sar = rx_control >> L2CAP_CTRL_SAR_SHIFT; |
Gustavo F. Padovan | f6337c7 | 2010-05-10 18:32:04 -0300 | [diff] [blame] | 3356 | int tx_seq_offset, expected_tx_seq_offset; |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3357 | int num_to_ack = (chan->tx_win/6) + 1; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3358 | int err = 0; |
| 3359 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3360 | BT_DBG("chan %p len %d tx_seq %d rx_control 0x%4.4x", chan, skb->len, |
| 3361 | tx_seq, rx_control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3362 | |
Gustavo F. Padovan | 9b16dc6 | 2010-05-05 20:05:57 -0300 | [diff] [blame] | 3363 | if (L2CAP_CTRL_FINAL & rx_control && |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3364 | test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3365 | __clear_monitor_timer(chan); |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3366 | if (chan->unacked_frames > 0) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3367 | __set_retrans_timer(chan); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3368 | clear_bit(CONN_WAIT_F, &chan->conn_state); |
Gustavo F. Padovan | 1d8f5d1 | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3369 | } |
| 3370 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3371 | chan->expected_ack_seq = req_seq; |
| 3372 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | 9f121a5 | 2009-10-03 02:34:38 -0300 | [diff] [blame] | 3373 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3374 | tx_seq_offset = (tx_seq - chan->buffer_seq) % 64; |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3375 | if (tx_seq_offset < 0) |
| 3376 | tx_seq_offset += 64; |
| 3377 | |
| 3378 | /* invalid tx_seq */ |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3379 | if (tx_seq_offset >= chan->tx_win) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 3380 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3381 | goto drop; |
| 3382 | } |
| 3383 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3384 | if (test_bit(CONN_LOCAL_BUSY, &chan->conn_state)) |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3385 | goto drop; |
| 3386 | |
Mat Martineau | 02f1b64 | 2011-06-29 14:35:19 -0700 | [diff] [blame] | 3387 | if (tx_seq == chan->expected_tx_seq) |
| 3388 | goto expected; |
| 3389 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3390 | if (test_bit(CONN_SREJ_SENT, &chan->conn_state)) { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3391 | struct srej_list *first; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3392 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 3393 | first = list_first_entry(&chan->srej_l, |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3394 | struct srej_list, list); |
| 3395 | if (tx_seq == first->tx_seq) { |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3396 | l2cap_add_to_srej_queue(chan, skb, tx_seq, sar); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3397 | l2cap_check_srej_gap(chan, tx_seq); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3398 | |
| 3399 | list_del(&first->list); |
| 3400 | kfree(first); |
| 3401 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 3402 | if (list_empty(&chan->srej_l)) { |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3403 | chan->buffer_seq = chan->buffer_seq_srej; |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3404 | clear_bit(CONN_SREJ_SENT, &chan->conn_state); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3405 | l2cap_send_ack(chan); |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 3406 | BT_DBG("chan %p, Exit SREJ_SENT", chan); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3407 | } |
| 3408 | } else { |
| 3409 | struct srej_list *l; |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3410 | |
| 3411 | /* duplicated tx_seq */ |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3412 | 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] | 3413 | goto drop; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3414 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 3415 | list_for_each_entry(l, &chan->srej_l, list) { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3416 | if (l->tx_seq == tx_seq) { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3417 | l2cap_resend_srejframe(chan, tx_seq); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3418 | return 0; |
| 3419 | } |
| 3420 | } |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3421 | l2cap_send_srejframe(chan, tx_seq); |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3422 | } |
| 3423 | } else { |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3424 | expected_tx_seq_offset = |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3425 | (chan->expected_tx_seq - chan->buffer_seq) % 64; |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3426 | if (expected_tx_seq_offset < 0) |
| 3427 | expected_tx_seq_offset += 64; |
| 3428 | |
| 3429 | /* duplicated tx_seq */ |
| 3430 | if (tx_seq_offset < expected_tx_seq_offset) |
| 3431 | goto drop; |
| 3432 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3433 | set_bit(CONN_SREJ_SENT, &chan->conn_state); |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3434 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 3435 | BT_DBG("chan %p, Enter SREJ", chan); |
Gustavo F. Padovan | 0e98958 | 2010-04-19 14:45:38 -0300 | [diff] [blame] | 3436 | |
Gustavo F. Padovan | 39d5a3e | 2011-04-04 15:40:12 -0300 | [diff] [blame] | 3437 | INIT_LIST_HEAD(&chan->srej_l); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3438 | chan->buffer_seq_srej = chan->buffer_seq; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3439 | |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3440 | __skb_queue_head_init(&chan->srej_q); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3441 | l2cap_add_to_srej_queue(chan, skb, tx_seq, sar); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3442 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3443 | set_bit(CONN_SEND_PBIT, &chan->conn_state); |
Gustavo F. Padovan | ef54fd9 | 2009-08-20 22:26:04 -0300 | [diff] [blame] | 3444 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3445 | l2cap_send_srejframe(chan, tx_seq); |
Gustavo F. Padovan | 7fe9b29 | 2010-05-12 18:32:04 -0300 | [diff] [blame] | 3446 | |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3447 | __clear_ack_timer(chan); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3448 | } |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3449 | return 0; |
| 3450 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3451 | expected: |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3452 | chan->expected_tx_seq = (chan->expected_tx_seq + 1) % 64; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3453 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3454 | if (test_bit(CONN_SREJ_SENT, &chan->conn_state)) { |
Gustavo F. Padovan | 3b1a9f3 | 2010-05-01 16:15:42 -0300 | [diff] [blame] | 3455 | bt_cb(skb)->tx_seq = tx_seq; |
| 3456 | bt_cb(skb)->sar = sar; |
Gustavo F. Padovan | f1c6775 | 2011-03-25 20:36:10 -0300 | [diff] [blame] | 3457 | __skb_queue_tail(&chan->srej_q, skb); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3458 | return 0; |
| 3459 | } |
| 3460 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3461 | err = l2cap_reassemble_sdu(chan, skb, rx_control); |
Mat Martineau | fadd192 | 2011-07-07 09:39:03 -0700 | [diff] [blame] | 3462 | chan->buffer_seq = (chan->buffer_seq + 1) % 64; |
Mat Martineau | e328140 | 2011-07-07 09:39:02 -0700 | [diff] [blame] | 3463 | if (err < 0) { |
| 3464 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
| 3465 | return err; |
| 3466 | } |
Gustavo F. Padovan | 2ece368 | 2010-06-16 17:21:44 -0300 | [diff] [blame] | 3467 | |
Gustavo F. Padovan | 4ec10d9 | 2009-10-03 02:34:39 -0300 | [diff] [blame] | 3468 | if (rx_control & L2CAP_CTRL_FINAL) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3469 | if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3470 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | 4ec10d9 | 2009-10-03 02:34:39 -0300 | [diff] [blame] | 3471 | } |
| 3472 | |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3473 | __set_ack_timer(chan); |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3474 | |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3475 | chan->num_acked = (chan->num_acked + 1) % num_to_ack; |
| 3476 | if (chan->num_acked == num_to_ack - 1) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3477 | l2cap_send_ack(chan); |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3478 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3479 | return 0; |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3480 | |
| 3481 | drop: |
| 3482 | kfree_skb(skb); |
| 3483 | return 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3484 | } |
| 3485 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3486 | 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] | 3487 | { |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 3488 | 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] | 3489 | rx_control); |
| 3490 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3491 | chan->expected_ack_seq = __get_reqseq(rx_control); |
| 3492 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3493 | |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3494 | if (rx_control & L2CAP_CTRL_POLL) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3495 | set_bit(CONN_SEND_FBIT, &chan->conn_state); |
| 3496 | if (test_bit(CONN_SREJ_SENT, &chan->conn_state)) { |
| 3497 | if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3498 | (chan->unacked_frames > 0)) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3499 | __set_retrans_timer(chan); |
Gustavo F. Padovan | 05fbd89 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3500 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3501 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3502 | l2cap_send_srejtail(chan); |
Gustavo F. Padovan | 05fbd89 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3503 | } else { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3504 | l2cap_send_i_or_rr_or_rnr(chan); |
Gustavo F. Padovan | 05fbd89 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3505 | } |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3506 | |
| 3507 | } else if (rx_control & L2CAP_CTRL_FINAL) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3508 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3509 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3510 | if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3511 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3512 | |
| 3513 | } else { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3514 | if (test_bit(CONN_REMOTE_BUSY, &chan->conn_state) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3515 | (chan->unacked_frames > 0)) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3516 | __set_retrans_timer(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3517 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3518 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
| 3519 | if (test_bit(CONN_SREJ_SENT, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3520 | l2cap_send_ack(chan); |
Andrei Emeltchenko | 894718a | 2010-12-01 16:58:24 +0200 | [diff] [blame] | 3521 | else |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3522 | l2cap_ertm_send(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3523 | } |
| 3524 | } |
| 3525 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3526 | 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] | 3527 | { |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3528 | u8 tx_seq = __get_reqseq(rx_control); |
| 3529 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3530 | 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] | 3531 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3532 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3533 | |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3534 | chan->expected_ack_seq = tx_seq; |
| 3535 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3536 | |
| 3537 | if (rx_control & L2CAP_CTRL_FINAL) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3538 | if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state)) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3539 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3540 | } else { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3541 | l2cap_retransmit_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3542 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3543 | if (test_bit(CONN_WAIT_F, &chan->conn_state)) |
| 3544 | set_bit(CONN_REJ_ACT, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3545 | } |
| 3546 | } |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3547 | 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] | 3548 | { |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3549 | u8 tx_seq = __get_reqseq(rx_control); |
| 3550 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3551 | 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] | 3552 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3553 | clear_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3554 | |
| 3555 | if (rx_control & L2CAP_CTRL_POLL) { |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3556 | chan->expected_ack_seq = tx_seq; |
| 3557 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 3558 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3559 | set_bit(CONN_SEND_FBIT, &chan->conn_state); |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3560 | l2cap_retransmit_one_frame(chan, tx_seq); |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 3561 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3562 | l2cap_ertm_send(chan); |
Gustavo F. Padovan | dfc909b | 2010-05-01 16:15:45 -0300 | [diff] [blame] | 3563 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3564 | if (test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3565 | chan->srej_save_reqseq = tx_seq; |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3566 | set_bit(CONN_SREJ_ACT, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3567 | } |
| 3568 | } else if (rx_control & L2CAP_CTRL_FINAL) { |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3569 | if (test_bit(CONN_SREJ_ACT, &chan->conn_state) && |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3570 | chan->srej_save_reqseq == tx_seq) |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3571 | clear_bit(CONN_SREJ_ACT, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3572 | else |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3573 | l2cap_retransmit_one_frame(chan, tx_seq); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3574 | } else { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3575 | l2cap_retransmit_one_frame(chan, tx_seq); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3576 | if (test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3577 | chan->srej_save_reqseq = tx_seq; |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3578 | set_bit(CONN_SREJ_ACT, &chan->conn_state); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3579 | } |
| 3580 | } |
| 3581 | } |
| 3582 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3583 | 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] | 3584 | { |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3585 | u8 tx_seq = __get_reqseq(rx_control); |
| 3586 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3587 | 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] | 3588 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3589 | set_bit(CONN_REMOTE_BUSY, &chan->conn_state); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3590 | chan->expected_ack_seq = tx_seq; |
| 3591 | l2cap_drop_acked_frames(chan); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3592 | |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 3593 | if (rx_control & L2CAP_CTRL_POLL) |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3594 | set_bit(CONN_SEND_FBIT, &chan->conn_state); |
Gustavo F. Padovan | 3cb123d | 2010-05-29 02:24:35 -0300 | [diff] [blame] | 3595 | |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3596 | if (!test_bit(CONN_SREJ_SENT, &chan->conn_state)) { |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3597 | __clear_retrans_timer(chan); |
Gustavo F. Padovan | a2e12a2 | 2010-05-05 19:58:27 -0300 | [diff] [blame] | 3598 | if (rx_control & L2CAP_CTRL_POLL) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3599 | l2cap_send_rr_or_rnr(chan, L2CAP_CTRL_FINAL); |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3600 | return; |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3601 | } |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3602 | |
| 3603 | if (rx_control & L2CAP_CTRL_POLL) |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3604 | l2cap_send_srejtail(chan); |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3605 | else |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3606 | l2cap_send_sframe(chan, L2CAP_SUPER_RCV_READY); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3607 | } |
| 3608 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3609 | 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] | 3610 | { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3611 | 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] | 3612 | |
Gustavo F. Padovan | 9b16dc6 | 2010-05-05 20:05:57 -0300 | [diff] [blame] | 3613 | if (L2CAP_CTRL_FINAL & rx_control && |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3614 | test_bit(CONN_WAIT_F, &chan->conn_state)) { |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3615 | __clear_monitor_timer(chan); |
Gustavo F. Padovan | 6a02661 | 2011-04-01 00:38:50 -0300 | [diff] [blame] | 3616 | if (chan->unacked_frames > 0) |
Gustavo F. Padovan | 1a09bcb | 2011-05-17 15:13:19 -0300 | [diff] [blame] | 3617 | __set_retrans_timer(chan); |
Gustavo F. Padovan | e2ab435 | 2011-06-10 21:28:49 -0300 | [diff] [blame] | 3618 | clear_bit(CONN_WAIT_F, &chan->conn_state); |
Gustavo F. Padovan | 1d8f5d1 | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3619 | } |
| 3620 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3621 | switch (rx_control & L2CAP_CTRL_SUPERVISE) { |
| 3622 | case L2CAP_SUPER_RCV_READY: |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3623 | l2cap_data_channel_rrframe(chan, rx_control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3624 | break; |
| 3625 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3626 | case L2CAP_SUPER_REJECT: |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3627 | l2cap_data_channel_rejframe(chan, rx_control); |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3628 | break; |
| 3629 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3630 | case L2CAP_SUPER_SELECT_REJECT: |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3631 | l2cap_data_channel_srejframe(chan, rx_control); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3632 | break; |
| 3633 | |
| 3634 | case L2CAP_SUPER_RCV_NOT_READY: |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3635 | l2cap_data_channel_rnrframe(chan, rx_control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3636 | break; |
| 3637 | } |
| 3638 | |
Gustavo F. Padovan | faaebd1 | 2010-05-01 16:15:35 -0300 | [diff] [blame] | 3639 | kfree_skb(skb); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3640 | return 0; |
| 3641 | } |
| 3642 | |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3643 | static int l2cap_ertm_data_rcv(struct sock *sk, struct sk_buff *skb) |
| 3644 | { |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3645 | struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3646 | u16 control; |
| 3647 | u8 req_seq; |
| 3648 | int len, next_tx_seq_offset, req_seq_offset; |
| 3649 | |
| 3650 | control = get_unaligned_le16(skb->data); |
| 3651 | skb_pull(skb, 2); |
| 3652 | len = skb->len; |
| 3653 | |
| 3654 | /* |
| 3655 | * We can just drop the corrupted I-frame here. |
| 3656 | * Receiver will miss it and start proper recovery |
| 3657 | * procedures and ask retransmission. |
| 3658 | */ |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3659 | if (l2cap_check_fcs(chan, skb)) |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3660 | goto drop; |
| 3661 | |
| 3662 | if (__is_sar_start(control) && __is_iframe(control)) |
| 3663 | len -= 2; |
| 3664 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3665 | if (chan->fcs == L2CAP_FCS_CRC16) |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3666 | len -= 2; |
| 3667 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3668 | if (len > chan->mps) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 3669 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3670 | goto drop; |
| 3671 | } |
| 3672 | |
| 3673 | req_seq = __get_reqseq(control); |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3674 | req_seq_offset = (req_seq - chan->expected_ack_seq) % 64; |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3675 | if (req_seq_offset < 0) |
| 3676 | req_seq_offset += 64; |
| 3677 | |
| 3678 | next_tx_seq_offset = |
Gustavo F. Padovan | 42e5c80 | 2011-03-25 19:58:34 -0300 | [diff] [blame] | 3679 | (chan->next_tx_seq - chan->expected_ack_seq) % 64; |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3680 | if (next_tx_seq_offset < 0) |
| 3681 | next_tx_seq_offset += 64; |
| 3682 | |
| 3683 | /* check for invalid req-seq */ |
| 3684 | if (req_seq_offset > next_tx_seq_offset) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 3685 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3686 | goto drop; |
| 3687 | } |
| 3688 | |
| 3689 | if (__is_iframe(control)) { |
| 3690 | if (len < 0) { |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 3691 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3692 | goto drop; |
| 3693 | } |
| 3694 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3695 | l2cap_data_channel_iframe(chan, control, skb); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3696 | } else { |
| 3697 | if (len != 0) { |
| 3698 | BT_ERR("%d", len); |
Gustavo F. Padovan | 8c1d787 | 2011-04-13 20:23:55 -0300 | [diff] [blame] | 3699 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3700 | goto drop; |
| 3701 | } |
| 3702 | |
Gustavo F. Padovan | 525cd18 | 2011-03-25 19:43:39 -0300 | [diff] [blame] | 3703 | l2cap_data_channel_sframe(chan, control, skb); |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3704 | } |
| 3705 | |
| 3706 | return 0; |
| 3707 | |
| 3708 | drop: |
| 3709 | kfree_skb(skb); |
| 3710 | return 0; |
| 3711 | } |
| 3712 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3713 | static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) |
| 3714 | { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3715 | struct l2cap_chan *chan; |
David S. Miller | bf73484 | 2011-04-25 13:03:02 -0700 | [diff] [blame] | 3716 | struct sock *sk = NULL; |
Nathan Holstein | 51893f8 | 2010-06-09 15:46:25 -0400 | [diff] [blame] | 3717 | u16 control; |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3718 | u8 tx_seq; |
| 3719 | int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3720 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 3721 | chan = l2cap_get_chan_by_scid(conn, cid); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3722 | if (!chan) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3723 | BT_DBG("unknown cid 0x%4.4x", cid); |
| 3724 | goto drop; |
| 3725 | } |
| 3726 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 3727 | sk = chan->sk; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3728 | |
Gustavo F. Padovan | 49208c9 | 2011-04-04 15:59:54 -0300 | [diff] [blame] | 3729 | BT_DBG("chan %p, len %d", chan, skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3730 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 3731 | if (chan->state != BT_CONNECTED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3732 | goto drop; |
| 3733 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3734 | switch (chan->mode) { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3735 | case L2CAP_MODE_BASIC: |
| 3736 | /* If socket recv buffers overflows we drop data here |
| 3737 | * which is *bad* because L2CAP has to be reliable. |
| 3738 | * But we don't have any other choice. L2CAP doesn't |
| 3739 | * provide flow control mechanism. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3740 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3741 | if (chan->imtu < skb->len) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3742 | goto drop; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3743 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 3744 | if (!chan->ops->recv(chan->data, skb)) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3745 | goto done; |
| 3746 | break; |
| 3747 | |
| 3748 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3749 | if (!sock_owned_by_user(sk)) { |
| 3750 | l2cap_ertm_data_rcv(sk, skb); |
Gustavo F. Padovan | 277ffbe | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3751 | } else { |
Gustavo F. Padovan | 218bb9d | 2010-06-21 18:53:22 -0300 | [diff] [blame] | 3752 | if (sk_add_backlog(sk, skb)) |
Gustavo F. Padovan | 277ffbe | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3753 | goto drop; |
Gustavo F. Padovan | 277ffbe | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3754 | } |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3755 | |
Andrei Emeltchenko | fcafde2 | 2009-12-22 15:58:08 +0200 | [diff] [blame] | 3756 | goto done; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3757 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3758 | case L2CAP_MODE_STREAMING: |
| 3759 | control = get_unaligned_le16(skb->data); |
| 3760 | skb_pull(skb, 2); |
| 3761 | len = skb->len; |
| 3762 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3763 | if (l2cap_check_fcs(chan, skb)) |
Gustavo F. Padovan | 2600008 | 2010-05-11 22:02:00 -0300 | [diff] [blame] | 3764 | goto drop; |
| 3765 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3766 | if (__is_sar_start(control)) |
| 3767 | len -= 2; |
| 3768 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3769 | if (chan->fcs == L2CAP_FCS_CRC16) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3770 | len -= 2; |
| 3771 | |
Gustavo F. Padovan | 47d1ec6 | 2011-04-13 15:57:03 -0300 | [diff] [blame] | 3772 | if (len > chan->mps || len < 0 || __is_sframe(control)) |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3773 | goto drop; |
| 3774 | |
| 3775 | tx_seq = __get_txseq(control); |
| 3776 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3777 | if (chan->expected_tx_seq != tx_seq) { |
| 3778 | /* Frame(s) missing - must discard partial SDU */ |
| 3779 | kfree_skb(chan->sdu); |
| 3780 | chan->sdu = NULL; |
| 3781 | chan->sdu_last_frag = NULL; |
| 3782 | chan->sdu_len = 0; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3783 | |
Mat Martineau | 84084a3 | 2011-07-22 14:54:00 -0700 | [diff] [blame] | 3784 | /* TODO: Notify userland of missing data */ |
| 3785 | } |
| 3786 | |
| 3787 | chan->expected_tx_seq = (tx_seq + 1) % 64; |
| 3788 | |
| 3789 | if (l2cap_reassemble_sdu(chan, skb, control) == -EMSGSIZE) |
| 3790 | l2cap_send_disconn_req(chan->conn, chan, ECONNRESET); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3791 | |
| 3792 | goto done; |
| 3793 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3794 | default: |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 3795 | 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] | 3796 | break; |
| 3797 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3798 | |
| 3799 | drop: |
| 3800 | kfree_skb(skb); |
| 3801 | |
| 3802 | done: |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 3803 | if (sk) |
| 3804 | bh_unlock_sock(sk); |
| 3805 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3806 | return 0; |
| 3807 | } |
| 3808 | |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 3809 | 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] | 3810 | { |
David S. Miller | 6dcae1e | 2011-05-16 23:09:26 -0400 | [diff] [blame] | 3811 | struct sock *sk = NULL; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 3812 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3813 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 3814 | chan = l2cap_global_chan_by_psm(0, psm, conn->src); |
| 3815 | if (!chan) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3816 | goto drop; |
| 3817 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 3818 | sk = chan->sk; |
| 3819 | |
Gustavo F. Padovan | e0f0cb5 | 2010-11-01 18:43:53 +0000 | [diff] [blame] | 3820 | bh_lock_sock(sk); |
| 3821 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3822 | BT_DBG("sk %p, len %d", sk, skb->len); |
| 3823 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 3824 | if (chan->state != BT_BOUND && chan->state != BT_CONNECTED) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3825 | goto drop; |
| 3826 | |
Vinicius Costa Gomes | e13e21d | 2011-06-17 22:46:27 -0300 | [diff] [blame] | 3827 | if (chan->imtu < skb->len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3828 | goto drop; |
| 3829 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 3830 | if (!chan->ops->recv(chan->data, skb)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3831 | goto done; |
| 3832 | |
| 3833 | drop: |
| 3834 | kfree_skb(skb); |
| 3835 | |
| 3836 | done: |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 3837 | if (sk) |
| 3838 | bh_unlock_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3839 | return 0; |
| 3840 | } |
| 3841 | |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 3842 | static inline int l2cap_att_channel(struct l2cap_conn *conn, __le16 cid, struct sk_buff *skb) |
| 3843 | { |
David S. Miller | 6dcae1e | 2011-05-16 23:09:26 -0400 | [diff] [blame] | 3844 | struct sock *sk = NULL; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 3845 | struct l2cap_chan *chan; |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 3846 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 3847 | chan = l2cap_global_chan_by_scid(0, cid, conn->src); |
| 3848 | if (!chan) |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 3849 | goto drop; |
| 3850 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 3851 | sk = chan->sk; |
| 3852 | |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 3853 | bh_lock_sock(sk); |
| 3854 | |
| 3855 | BT_DBG("sk %p, len %d", sk, skb->len); |
| 3856 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 3857 | if (chan->state != BT_BOUND && chan->state != BT_CONNECTED) |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 3858 | goto drop; |
| 3859 | |
Vinicius Costa Gomes | e13e21d | 2011-06-17 22:46:27 -0300 | [diff] [blame] | 3860 | if (chan->imtu < skb->len) |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 3861 | goto drop; |
| 3862 | |
Gustavo F. Padovan | 2307049 | 2011-05-16 17:57:22 -0300 | [diff] [blame] | 3863 | if (!chan->ops->recv(chan->data, skb)) |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 3864 | goto done; |
| 3865 | |
| 3866 | drop: |
| 3867 | kfree_skb(skb); |
| 3868 | |
| 3869 | done: |
| 3870 | if (sk) |
| 3871 | bh_unlock_sock(sk); |
| 3872 | return 0; |
| 3873 | } |
| 3874 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3875 | static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) |
| 3876 | { |
| 3877 | struct l2cap_hdr *lh = (void *) skb->data; |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 3878 | u16 cid, len; |
| 3879 | __le16 psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3880 | |
| 3881 | skb_pull(skb, L2CAP_HDR_SIZE); |
| 3882 | cid = __le16_to_cpu(lh->cid); |
| 3883 | len = __le16_to_cpu(lh->len); |
| 3884 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3885 | if (len != skb->len) { |
| 3886 | kfree_skb(skb); |
| 3887 | return; |
| 3888 | } |
| 3889 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3890 | BT_DBG("len %d, cid 0x%4.4x", len, cid); |
| 3891 | |
| 3892 | switch (cid) { |
Claudio Takahasi | 3300d9a | 2011-02-11 19:28:54 -0200 | [diff] [blame] | 3893 | case L2CAP_CID_LE_SIGNALING: |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 3894 | case L2CAP_CID_SIGNALING: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3895 | l2cap_sig_channel(conn, skb); |
| 3896 | break; |
| 3897 | |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 3898 | case L2CAP_CID_CONN_LESS: |
Gustavo F. Padovan | 1b7bf4e | 2009-08-24 00:45:20 -0300 | [diff] [blame] | 3899 | psm = get_unaligned_le16(skb->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3900 | skb_pull(skb, 2); |
| 3901 | l2cap_conless_channel(conn, psm, skb); |
| 3902 | break; |
| 3903 | |
Gustavo F. Padovan | 9f69bda | 2011-04-07 16:40:25 -0300 | [diff] [blame] | 3904 | case L2CAP_CID_LE_DATA: |
| 3905 | l2cap_att_channel(conn, cid, skb); |
| 3906 | break; |
| 3907 | |
Anderson Briglia | b501d6a | 2011-06-07 18:46:31 -0300 | [diff] [blame] | 3908 | case L2CAP_CID_SMP: |
| 3909 | if (smp_sig_channel(conn, skb)) |
| 3910 | l2cap_conn_del(conn->hcon, EACCES); |
| 3911 | break; |
| 3912 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3913 | default: |
| 3914 | l2cap_data_channel(conn, cid, skb); |
| 3915 | break; |
| 3916 | } |
| 3917 | } |
| 3918 | |
| 3919 | /* ---- L2CAP interface with lower layer (HCI) ---- */ |
| 3920 | |
| 3921 | static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) |
| 3922 | { |
| 3923 | int exact = 0, lm1 = 0, lm2 = 0; |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 3924 | struct l2cap_chan *c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3925 | |
| 3926 | if (type != ACL_LINK) |
João Paulo Rechi Vita | 963cf68 | 2010-06-22 13:56:28 -0300 | [diff] [blame] | 3927 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3928 | |
| 3929 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); |
| 3930 | |
| 3931 | /* Find listening sockets and check their link_mode */ |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 3932 | read_lock(&chan_list_lock); |
| 3933 | list_for_each_entry(c, &chan_list, global_l) { |
| 3934 | struct sock *sk = c->sk; |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 3935 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 3936 | if (c->state != BT_LISTEN) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3937 | continue; |
| 3938 | |
| 3939 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 3940 | lm1 |= HCI_LM_ACCEPT; |
Andrei Emeltchenko | 43bd0f3 | 2011-10-11 14:04:34 +0300 | [diff] [blame^] | 3941 | if (test_bit(FLAG_ROLE_SWITCH, &c->flags)) |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 3942 | lm1 |= HCI_LM_MASTER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3943 | exact++; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 3944 | } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { |
| 3945 | lm2 |= HCI_LM_ACCEPT; |
Andrei Emeltchenko | 43bd0f3 | 2011-10-11 14:04:34 +0300 | [diff] [blame^] | 3946 | if (test_bit(FLAG_ROLE_SWITCH, &c->flags)) |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 3947 | lm2 |= HCI_LM_MASTER; |
| 3948 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3949 | } |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 3950 | read_unlock(&chan_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3951 | |
| 3952 | return exact ? lm1 : lm2; |
| 3953 | } |
| 3954 | |
| 3955 | static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) |
| 3956 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 3957 | struct l2cap_conn *conn; |
| 3958 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3959 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); |
| 3960 | |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 3961 | if (!(hcon->type == ACL_LINK || hcon->type == LE_LINK)) |
João Paulo Rechi Vita | 963cf68 | 2010-06-22 13:56:28 -0300 | [diff] [blame] | 3962 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3963 | |
| 3964 | if (!status) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3965 | conn = l2cap_conn_add(hcon, status); |
| 3966 | if (conn) |
| 3967 | l2cap_conn_ready(conn); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 3968 | } else |
Joe Perches | e175072 | 2011-06-29 18:18:29 -0700 | [diff] [blame] | 3969 | l2cap_conn_del(hcon, bt_to_errno(status)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3970 | |
| 3971 | return 0; |
| 3972 | } |
| 3973 | |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 3974 | static int l2cap_disconn_ind(struct hci_conn *hcon) |
| 3975 | { |
| 3976 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 3977 | |
| 3978 | BT_DBG("hcon %p", hcon); |
| 3979 | |
Gustavo F. Padovan | b569450 | 2011-06-08 19:09:13 -0300 | [diff] [blame] | 3980 | if ((hcon->type != ACL_LINK && hcon->type != LE_LINK) || !conn) |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 3981 | return 0x13; |
| 3982 | |
| 3983 | return conn->disc_reason; |
| 3984 | } |
| 3985 | |
| 3986 | static int l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3987 | { |
| 3988 | BT_DBG("hcon %p reason %d", hcon, reason); |
| 3989 | |
Ville Tervo | acd7d37 | 2011-02-10 22:38:49 -0300 | [diff] [blame] | 3990 | if (!(hcon->type == ACL_LINK || hcon->type == LE_LINK)) |
João Paulo Rechi Vita | 963cf68 | 2010-06-22 13:56:28 -0300 | [diff] [blame] | 3991 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3992 | |
Joe Perches | e175072 | 2011-06-29 18:18:29 -0700 | [diff] [blame] | 3993 | l2cap_conn_del(hcon, bt_to_errno(reason)); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 3994 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3995 | return 0; |
| 3996 | } |
| 3997 | |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 3998 | static inline void l2cap_check_encryption(struct l2cap_chan *chan, u8 encrypt) |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 3999 | { |
Gustavo F. Padovan | 715ec00 | 2011-05-02 17:13:55 -0300 | [diff] [blame] | 4000 | if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED) |
Marcel Holtmann | 255c760 | 2009-02-04 21:07:19 +0100 | [diff] [blame] | 4001 | return; |
| 4002 | |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4003 | if (encrypt == 0x00) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4004 | if (chan->sec_level == BT_SECURITY_MEDIUM) { |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 4005 | __clear_chan_timer(chan); |
| 4006 | __set_chan_timer(chan, HZ * 5); |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4007 | } else if (chan->sec_level == BT_SECURITY_HIGH) |
Gustavo F. Padovan | 0f85272 | 2011-05-04 19:42:50 -0300 | [diff] [blame] | 4008 | l2cap_chan_close(chan, ECONNREFUSED); |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4009 | } else { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4010 | if (chan->sec_level == BT_SECURITY_MEDIUM) |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 4011 | __clear_chan_timer(chan); |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4012 | } |
| 4013 | } |
| 4014 | |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 4015 | 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] | 4016 | { |
Marcel Holtmann | 40be492 | 2008-07-14 20:13:50 +0200 | [diff] [blame] | 4017 | struct l2cap_conn *conn = hcon->l2cap_data; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4018 | struct l2cap_chan *chan; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4019 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4020 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4021 | return 0; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4022 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4023 | BT_DBG("conn %p", conn); |
| 4024 | |
Vinicius Costa Gomes | 160dc6a | 2011-08-19 21:06:55 -0300 | [diff] [blame] | 4025 | if (hcon->type == LE_LINK) { |
| 4026 | smp_distribute_keys(conn, 0); |
| 4027 | del_timer(&conn->security_timer); |
| 4028 | } |
| 4029 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 4030 | read_lock(&conn->chan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4031 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 4032 | list_for_each_entry(chan, &conn->chan_l, list) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4033 | struct sock *sk = chan->sk; |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 4034 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4035 | bh_lock_sock(sk); |
| 4036 | |
Vinicius Costa Gomes | f1cb9af | 2011-01-26 21:42:57 -0300 | [diff] [blame] | 4037 | BT_DBG("chan->scid %d", chan->scid); |
| 4038 | |
| 4039 | if (chan->scid == L2CAP_CID_LE_DATA) { |
| 4040 | if (!status && encrypt) { |
| 4041 | chan->sec_level = hcon->sec_level; |
| 4042 | l2cap_chan_ready(sk); |
| 4043 | } |
| 4044 | |
| 4045 | bh_unlock_sock(sk); |
| 4046 | continue; |
| 4047 | } |
| 4048 | |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 4049 | if (test_bit(CONF_CONNECT_PEND, &chan->conf_state)) { |
Marcel Holtmann | 6a8d301 | 2009-02-06 23:56:36 +0100 | [diff] [blame] | 4050 | bh_unlock_sock(sk); |
| 4051 | continue; |
| 4052 | } |
| 4053 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4054 | if (!status && (chan->state == BT_CONNECTED || |
| 4055 | chan->state == BT_CONFIG)) { |
Gustavo F. Padovan | 4343478 | 2011-04-12 18:31:57 -0300 | [diff] [blame] | 4056 | l2cap_check_encryption(chan, encrypt); |
Marcel Holtmann | 9719f8a | 2008-07-14 20:13:45 +0200 | [diff] [blame] | 4057 | bh_unlock_sock(sk); |
| 4058 | continue; |
| 4059 | } |
| 4060 | |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4061 | if (chan->state == BT_CONNECT) { |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4062 | if (!status) { |
| 4063 | struct l2cap_conn_req req; |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 4064 | req.scid = cpu_to_le16(chan->scid); |
| 4065 | req.psm = chan->psm; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4066 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 4067 | chan->ident = l2cap_get_ident(conn); |
Gustavo F. Padovan | c1360a1 | 2011-06-10 17:02:12 -0300 | [diff] [blame] | 4068 | set_bit(CONF_CONNECT_PEND, &chan->conf_state); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4069 | |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 4070 | l2cap_send_cmd(conn, chan->ident, |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4071 | L2CAP_CONN_REQ, sizeof(req), &req); |
| 4072 | } else { |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 4073 | __clear_chan_timer(chan); |
| 4074 | __set_chan_timer(chan, HZ / 10); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4075 | } |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4076 | } else if (chan->state == BT_CONNECT2) { |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4077 | struct l2cap_conn_rsp rsp; |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4078 | __u16 res, stat; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4079 | |
| 4080 | if (!status) { |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4081 | if (bt_sk(sk)->defer_setup) { |
| 4082 | struct sock *parent = bt_sk(sk)->parent; |
| 4083 | res = L2CAP_CR_PEND; |
| 4084 | stat = L2CAP_CS_AUTHOR_PEND; |
Ilia Kolomisnky | 05e9a2f | 2011-07-15 18:30:21 +0000 | [diff] [blame] | 4085 | if (parent) |
| 4086 | parent->sk_data_ready(parent, 0); |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4087 | } else { |
Gustavo F. Padovan | 0555891 | 2011-06-21 14:52:56 -0300 | [diff] [blame] | 4088 | l2cap_state_change(chan, BT_CONFIG); |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4089 | res = L2CAP_CR_SUCCESS; |
| 4090 | stat = L2CAP_CS_NO_INFO; |
| 4091 | } |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4092 | } else { |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4093 | l2cap_state_change(chan, BT_DISCONN); |
Gustavo F. Padovan | c9b6667 | 2011-05-17 14:59:01 -0300 | [diff] [blame] | 4094 | __set_chan_timer(chan, HZ / 10); |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4095 | res = L2CAP_CR_SEC_BLOCK; |
| 4096 | stat = L2CAP_CS_NO_INFO; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4097 | } |
| 4098 | |
Gustavo F. Padovan | fe4128e | 2011-04-13 19:50:45 -0300 | [diff] [blame] | 4099 | rsp.scid = cpu_to_le16(chan->dcid); |
| 4100 | rsp.dcid = cpu_to_le16(chan->scid); |
Johan Hedberg | df3c393 | 2011-06-14 12:48:19 +0300 | [diff] [blame] | 4101 | rsp.result = cpu_to_le16(res); |
| 4102 | rsp.status = cpu_to_le16(stat); |
Gustavo F. Padovan | fc7f8a7 | 2011-03-25 13:59:37 -0300 | [diff] [blame] | 4103 | l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP, |
| 4104 | sizeof(rsp), &rsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4105 | } |
| 4106 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4107 | bh_unlock_sock(sk); |
| 4108 | } |
| 4109 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 4110 | read_unlock(&conn->chan_lock); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4111 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4112 | return 0; |
| 4113 | } |
| 4114 | |
| 4115 | static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) |
| 4116 | { |
| 4117 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 4118 | |
Andrei Emeltchenko | 5a08ecc | 2011-01-11 17:20:20 +0200 | [diff] [blame] | 4119 | if (!conn) |
| 4120 | conn = l2cap_conn_add(hcon, 0); |
| 4121 | |
| 4122 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4123 | goto drop; |
| 4124 | |
| 4125 | BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); |
| 4126 | |
Andrei Emeltchenko | e702112 | 2011-01-03 11:14:36 +0200 | [diff] [blame] | 4127 | if (!(flags & ACL_CONT)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4128 | struct l2cap_hdr *hdr; |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4129 | struct l2cap_chan *chan; |
Andrei Emeltchenko | 8979481 | 2010-09-15 14:28:44 +0300 | [diff] [blame] | 4130 | u16 cid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4131 | int len; |
| 4132 | |
| 4133 | if (conn->rx_len) { |
| 4134 | BT_ERR("Unexpected start frame (len %d)", skb->len); |
| 4135 | kfree_skb(conn->rx_skb); |
| 4136 | conn->rx_skb = NULL; |
| 4137 | conn->rx_len = 0; |
| 4138 | l2cap_conn_unreliable(conn, ECOMM); |
| 4139 | } |
| 4140 | |
Andrei Emeltchenko | aae7fe2 | 2010-09-15 14:28:43 +0300 | [diff] [blame] | 4141 | /* Start fragment always begin with Basic L2CAP header */ |
| 4142 | if (skb->len < L2CAP_HDR_SIZE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4143 | BT_ERR("Frame is too short (len %d)", skb->len); |
| 4144 | l2cap_conn_unreliable(conn, ECOMM); |
| 4145 | goto drop; |
| 4146 | } |
| 4147 | |
| 4148 | hdr = (struct l2cap_hdr *) skb->data; |
| 4149 | len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; |
Andrei Emeltchenko | 8979481 | 2010-09-15 14:28:44 +0300 | [diff] [blame] | 4150 | cid = __le16_to_cpu(hdr->cid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4151 | |
| 4152 | if (len == skb->len) { |
| 4153 | /* Complete frame received */ |
| 4154 | l2cap_recv_frame(conn, skb); |
| 4155 | return 0; |
| 4156 | } |
| 4157 | |
| 4158 | BT_DBG("Start: total len %d, frag len %d", len, skb->len); |
| 4159 | |
| 4160 | if (skb->len > len) { |
| 4161 | BT_ERR("Frame is too long (len %d, expected len %d)", |
| 4162 | skb->len, len); |
| 4163 | l2cap_conn_unreliable(conn, ECOMM); |
| 4164 | goto drop; |
| 4165 | } |
| 4166 | |
Gustavo F. Padovan | baa7e1f | 2011-03-31 16:17:41 -0300 | [diff] [blame] | 4167 | chan = l2cap_get_chan_by_scid(conn, cid); |
Andrei Emeltchenko | 8979481 | 2010-09-15 14:28:44 +0300 | [diff] [blame] | 4168 | |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4169 | if (chan && chan->sk) { |
| 4170 | struct sock *sk = chan->sk; |
| 4171 | |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 4172 | if (chan->imtu < len - L2CAP_HDR_SIZE) { |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4173 | BT_ERR("Frame exceeding recv MTU (len %d, " |
| 4174 | "MTU %d)", len, |
Gustavo F. Padovan | 0c1bc5c | 2011-04-13 17:20:49 -0300 | [diff] [blame] | 4175 | chan->imtu); |
Gustavo F. Padovan | 4845407 | 2011-03-25 00:22:30 -0300 | [diff] [blame] | 4176 | bh_unlock_sock(sk); |
| 4177 | l2cap_conn_unreliable(conn, ECOMM); |
| 4178 | goto drop; |
| 4179 | } |
Andrei Emeltchenko | 8979481 | 2010-09-15 14:28:44 +0300 | [diff] [blame] | 4180 | bh_unlock_sock(sk); |
Andrei Emeltchenko | 8979481 | 2010-09-15 14:28:44 +0300 | [diff] [blame] | 4181 | } |
| 4182 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4183 | /* Allocate skb for the complete frame (with header) */ |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 4184 | conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC); |
| 4185 | if (!conn->rx_skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4186 | goto drop; |
| 4187 | |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 4188 | 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] | 4189 | skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4190 | conn->rx_len = len - skb->len; |
| 4191 | } else { |
| 4192 | BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); |
| 4193 | |
| 4194 | if (!conn->rx_len) { |
| 4195 | BT_ERR("Unexpected continuation frame (len %d)", skb->len); |
| 4196 | l2cap_conn_unreliable(conn, ECOMM); |
| 4197 | goto drop; |
| 4198 | } |
| 4199 | |
| 4200 | if (skb->len > conn->rx_len) { |
| 4201 | BT_ERR("Fragment is too long (len %d, expected %d)", |
| 4202 | skb->len, conn->rx_len); |
| 4203 | kfree_skb(conn->rx_skb); |
| 4204 | conn->rx_skb = NULL; |
| 4205 | conn->rx_len = 0; |
| 4206 | l2cap_conn_unreliable(conn, ECOMM); |
| 4207 | goto drop; |
| 4208 | } |
| 4209 | |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 4210 | 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] | 4211 | skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4212 | conn->rx_len -= skb->len; |
| 4213 | |
| 4214 | if (!conn->rx_len) { |
| 4215 | /* Complete frame received */ |
| 4216 | l2cap_recv_frame(conn, conn->rx_skb); |
| 4217 | conn->rx_skb = NULL; |
| 4218 | } |
| 4219 | } |
| 4220 | |
| 4221 | drop: |
| 4222 | kfree_skb(skb); |
| 4223 | return 0; |
| 4224 | } |
| 4225 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4226 | static int l2cap_debugfs_show(struct seq_file *f, void *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4227 | { |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4228 | struct l2cap_chan *c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4229 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4230 | read_lock_bh(&chan_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4231 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4232 | list_for_each_entry(c, &chan_list, global_l) { |
| 4233 | struct sock *sk = c->sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4234 | |
Gustavo F. Padovan | 903d343 | 2011-02-10 14:16:06 -0200 | [diff] [blame] | 4235 | 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] | 4236 | batostr(&bt_sk(sk)->src), |
| 4237 | batostr(&bt_sk(sk)->dst), |
Gustavo F. Padovan | 89bc500 | 2011-06-03 00:19:47 -0300 | [diff] [blame] | 4238 | c->state, __le16_to_cpu(c->psm), |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4239 | c->scid, c->dcid, c->imtu, c->omtu, |
| 4240 | c->sec_level, c->mode); |
Gustavo F. Padovan | 0555891 | 2011-06-21 14:52:56 -0300 | [diff] [blame] | 4241 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4242 | |
Gustavo F. Padovan | 23691d7 | 2011-04-27 18:26:32 -0300 | [diff] [blame] | 4243 | read_unlock_bh(&chan_list_lock); |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 4244 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4245 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4246 | } |
| 4247 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4248 | static int l2cap_debugfs_open(struct inode *inode, struct file *file) |
| 4249 | { |
| 4250 | return single_open(file, l2cap_debugfs_show, inode->i_private); |
| 4251 | } |
| 4252 | |
| 4253 | static const struct file_operations l2cap_debugfs_fops = { |
| 4254 | .open = l2cap_debugfs_open, |
| 4255 | .read = seq_read, |
| 4256 | .llseek = seq_lseek, |
| 4257 | .release = single_release, |
| 4258 | }; |
| 4259 | |
| 4260 | static struct dentry *l2cap_debugfs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4261 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4262 | static struct hci_proto l2cap_hci_proto = { |
| 4263 | .name = "L2CAP", |
| 4264 | .id = HCI_PROTO_L2CAP, |
| 4265 | .connect_ind = l2cap_connect_ind, |
| 4266 | .connect_cfm = l2cap_connect_cfm, |
| 4267 | .disconn_ind = l2cap_disconn_ind, |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 4268 | .disconn_cfm = l2cap_disconn_cfm, |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 4269 | .security_cfm = l2cap_security_cfm, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4270 | .recv_acldata = l2cap_recv_acldata |
| 4271 | }; |
| 4272 | |
Gustavo F. Padovan | 6427451 | 2011-02-07 20:08:52 -0200 | [diff] [blame] | 4273 | int __init l2cap_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4274 | { |
| 4275 | int err; |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 4276 | |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 4277 | err = l2cap_init_sockets(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4278 | if (err < 0) |
| 4279 | return err; |
| 4280 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4281 | err = hci_register_proto(&l2cap_hci_proto); |
| 4282 | if (err < 0) { |
| 4283 | BT_ERR("L2CAP protocol registration failed"); |
| 4284 | bt_sock_unregister(BTPROTO_L2CAP); |
| 4285 | goto error; |
| 4286 | } |
| 4287 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4288 | if (bt_debugfs) { |
| 4289 | l2cap_debugfs = debugfs_create_file("l2cap", 0444, |
| 4290 | bt_debugfs, NULL, &l2cap_debugfs_fops); |
| 4291 | if (!l2cap_debugfs) |
| 4292 | BT_ERR("Failed to create L2CAP debug file"); |
| 4293 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4294 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4295 | return 0; |
| 4296 | |
| 4297 | error: |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 4298 | l2cap_cleanup_sockets(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4299 | return err; |
| 4300 | } |
| 4301 | |
Gustavo F. Padovan | 6427451 | 2011-02-07 20:08:52 -0200 | [diff] [blame] | 4302 | void l2cap_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4303 | { |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4304 | debugfs_remove(l2cap_debugfs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4305 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4306 | if (hci_unregister_proto(&l2cap_hci_proto) < 0) |
| 4307 | BT_ERR("L2CAP protocol unregistration failed"); |
| 4308 | |
Gustavo F. Padovan | bb58f74 | 2011-02-03 20:50:35 -0200 | [diff] [blame] | 4309 | l2cap_cleanup_sockets(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4310 | } |
| 4311 | |
Gustavo F. Padovan | d1c4a17 | 2010-07-18 16:25:54 -0300 | [diff] [blame] | 4312 | module_param(disable_ertm, bool, 0644); |
| 4313 | MODULE_PARM_DESC(disable_ertm, "Disable enhanced retransmission mode"); |
Andrei Emeltchenko | a5fd6f3 | 2011-09-16 16:26:32 +0300 | [diff] [blame] | 4314 | |
| 4315 | module_param(enable_hs, bool, 0644); |
| 4316 | MODULE_PARM_DESC(enable_hs, "Enable High Speed"); |