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 |
| 4 | |
| 5 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License version 2 as |
| 9 | published by the Free Software Foundation; |
| 10 | |
| 11 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| 12 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 13 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. |
| 14 | 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] | 15 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
| 16 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 17 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 19 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 20 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
| 21 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | SOFTWARE IS DISCLAIMED. |
| 23 | */ |
| 24 | |
| 25 | /* Bluetooth L2CAP core and sockets. */ |
| 26 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <linux/module.h> |
| 28 | |
| 29 | #include <linux/types.h> |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 30 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <linux/errno.h> |
| 32 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/sched.h> |
| 34 | #include <linux/slab.h> |
| 35 | #include <linux/poll.h> |
| 36 | #include <linux/fcntl.h> |
| 37 | #include <linux/init.h> |
| 38 | #include <linux/interrupt.h> |
| 39 | #include <linux/socket.h> |
| 40 | #include <linux/skbuff.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include <linux/list.h> |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 42 | #include <linux/device.h> |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 43 | #include <linux/debugfs.h> |
| 44 | #include <linux/seq_file.h> |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 45 | #include <linux/uaccess.h> |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 46 | #include <linux/crc16.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | #include <net/sock.h> |
| 48 | |
| 49 | #include <asm/system.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #include <asm/unaligned.h> |
| 51 | |
| 52 | #include <net/bluetooth/bluetooth.h> |
| 53 | #include <net/bluetooth/hci_core.h> |
| 54 | #include <net/bluetooth/l2cap.h> |
| 55 | |
Marcel Holtmann | 44dd46d | 2009-05-02 19:09:01 -0700 | [diff] [blame] | 56 | #define VERSION "2.14" |
| 57 | |
Gustavo F. Padovan | 84fb0a6 | 2010-05-01 16:15:42 -0300 | [diff] [blame] | 58 | #ifdef CONFIG_BT_L2CAP_EXT_FEATURES |
| 59 | static int enable_ertm = 1; |
| 60 | #else |
Marcel Holtmann | 44dd46d | 2009-05-02 19:09:01 -0700 | [diff] [blame] | 61 | static int enable_ertm = 0; |
Gustavo F. Padovan | 84fb0a6 | 2010-05-01 16:15:42 -0300 | [diff] [blame] | 62 | #endif |
Marcel Holtmann | 5fbcd3d | 2009-10-05 11:35:43 +0200 | [diff] [blame] | 63 | static int max_transmit = L2CAP_DEFAULT_MAX_TX; |
Gustavo F. Padovan | 369ba30 | 2010-05-01 16:15:41 -0300 | [diff] [blame] | 64 | static int tx_window = L2CAP_DEFAULT_TX_WINDOW; |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 65 | |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 66 | static u32 l2cap_feat_mask = L2CAP_FEAT_FIXED_CHAN; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 67 | static u8 l2cap_fixed_chan[8] = { 0x02, }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 69 | static const struct proto_ops l2cap_sock_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 71 | static struct workqueue_struct *_busy_wq; |
| 72 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | static struct bt_sock_list l2cap_sk_list = { |
Robert P. J. Day | d5fb296 | 2008-03-28 16:17:38 -0700 | [diff] [blame] | 74 | .lock = __RW_LOCK_UNLOCKED(l2cap_sk_list.lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | }; |
| 76 | |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 77 | static void l2cap_busy_work(struct work_struct *work); |
| 78 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | static void __l2cap_sock_close(struct sock *sk, int reason); |
| 80 | static void l2cap_sock_close(struct sock *sk); |
| 81 | static void l2cap_sock_kill(struct sock *sk); |
| 82 | |
| 83 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, |
| 84 | u8 code, u8 ident, u16 dlen, void *data); |
| 85 | |
| 86 | /* ---- L2CAP timers ---- */ |
| 87 | static void l2cap_sock_timeout(unsigned long arg) |
| 88 | { |
| 89 | struct sock *sk = (struct sock *) arg; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 90 | int reason; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | |
| 92 | BT_DBG("sock %p state %d", sk, sk->sk_state); |
| 93 | |
| 94 | bh_lock_sock(sk); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 95 | |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 96 | if (sk->sk_state == BT_CONNECTED || sk->sk_state == BT_CONFIG) |
| 97 | reason = ECONNREFUSED; |
| 98 | else if (sk->sk_state == BT_CONNECT && |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 99 | l2cap_pi(sk)->sec_level != BT_SECURITY_SDP) |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 100 | reason = ECONNREFUSED; |
| 101 | else |
| 102 | reason = ETIMEDOUT; |
| 103 | |
| 104 | __l2cap_sock_close(sk, reason); |
| 105 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | bh_unlock_sock(sk); |
| 107 | |
| 108 | l2cap_sock_kill(sk); |
| 109 | sock_put(sk); |
| 110 | } |
| 111 | |
| 112 | static void l2cap_sock_set_timer(struct sock *sk, long timeout) |
| 113 | { |
| 114 | BT_DBG("sk %p state %d timeout %ld", sk, sk->sk_state, timeout); |
| 115 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); |
| 116 | } |
| 117 | |
| 118 | static void l2cap_sock_clear_timer(struct sock *sk) |
| 119 | { |
| 120 | BT_DBG("sock %p state %d", sk, sk->sk_state); |
| 121 | sk_stop_timer(sk, &sk->sk_timer); |
| 122 | } |
| 123 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 124 | /* ---- L2CAP channels ---- */ |
| 125 | static struct sock *__l2cap_get_chan_by_dcid(struct l2cap_chan_list *l, u16 cid) |
| 126 | { |
| 127 | struct sock *s; |
| 128 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { |
| 129 | if (l2cap_pi(s)->dcid == cid) |
| 130 | break; |
| 131 | } |
| 132 | return s; |
| 133 | } |
| 134 | |
| 135 | static struct sock *__l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) |
| 136 | { |
| 137 | struct sock *s; |
| 138 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { |
| 139 | if (l2cap_pi(s)->scid == cid) |
| 140 | break; |
| 141 | } |
| 142 | return s; |
| 143 | } |
| 144 | |
| 145 | /* Find channel with given SCID. |
| 146 | * Returns locked socket */ |
| 147 | static inline struct sock *l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) |
| 148 | { |
| 149 | struct sock *s; |
| 150 | read_lock(&l->lock); |
| 151 | s = __l2cap_get_chan_by_scid(l, cid); |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 152 | if (s) |
| 153 | bh_lock_sock(s); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 154 | read_unlock(&l->lock); |
| 155 | return s; |
| 156 | } |
| 157 | |
| 158 | static struct sock *__l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) |
| 159 | { |
| 160 | struct sock *s; |
| 161 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { |
| 162 | if (l2cap_pi(s)->ident == ident) |
| 163 | break; |
| 164 | } |
| 165 | return s; |
| 166 | } |
| 167 | |
| 168 | static inline struct sock *l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) |
| 169 | { |
| 170 | struct sock *s; |
| 171 | read_lock(&l->lock); |
| 172 | s = __l2cap_get_chan_by_ident(l, ident); |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 173 | if (s) |
| 174 | bh_lock_sock(s); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 175 | read_unlock(&l->lock); |
| 176 | return s; |
| 177 | } |
| 178 | |
| 179 | static u16 l2cap_alloc_cid(struct l2cap_chan_list *l) |
| 180 | { |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 181 | u16 cid = L2CAP_CID_DYN_START; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 182 | |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 183 | for (; cid < L2CAP_CID_DYN_END; cid++) { |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 184 | if (!__l2cap_get_chan_by_scid(l, cid)) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 185 | return cid; |
| 186 | } |
| 187 | |
| 188 | return 0; |
| 189 | } |
| 190 | |
| 191 | static inline void __l2cap_chan_link(struct l2cap_chan_list *l, struct sock *sk) |
| 192 | { |
| 193 | sock_hold(sk); |
| 194 | |
| 195 | if (l->head) |
| 196 | l2cap_pi(l->head)->prev_c = sk; |
| 197 | |
| 198 | l2cap_pi(sk)->next_c = l->head; |
| 199 | l2cap_pi(sk)->prev_c = NULL; |
| 200 | l->head = sk; |
| 201 | } |
| 202 | |
| 203 | static inline void l2cap_chan_unlink(struct l2cap_chan_list *l, struct sock *sk) |
| 204 | { |
| 205 | struct sock *next = l2cap_pi(sk)->next_c, *prev = l2cap_pi(sk)->prev_c; |
| 206 | |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 207 | write_lock_bh(&l->lock); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 208 | if (sk == l->head) |
| 209 | l->head = next; |
| 210 | |
| 211 | if (next) |
| 212 | l2cap_pi(next)->prev_c = prev; |
| 213 | if (prev) |
| 214 | l2cap_pi(prev)->next_c = next; |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 215 | write_unlock_bh(&l->lock); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 216 | |
| 217 | __sock_put(sk); |
| 218 | } |
| 219 | |
| 220 | static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) |
| 221 | { |
| 222 | struct l2cap_chan_list *l = &conn->chan_list; |
| 223 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 224 | BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, |
| 225 | l2cap_pi(sk)->psm, l2cap_pi(sk)->dcid); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 226 | |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 227 | conn->disc_reason = 0x13; |
| 228 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 229 | l2cap_pi(sk)->conn = conn; |
| 230 | |
Gustavo F. Padovan | bd3c9e2 | 2010-05-01 16:15:42 -0300 | [diff] [blame] | 231 | if (sk->sk_type == SOCK_SEQPACKET || sk->sk_type == SOCK_STREAM) { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 232 | /* Alloc CID for connection-oriented socket */ |
| 233 | l2cap_pi(sk)->scid = l2cap_alloc_cid(l); |
| 234 | } else if (sk->sk_type == SOCK_DGRAM) { |
| 235 | /* Connectionless socket */ |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 236 | l2cap_pi(sk)->scid = L2CAP_CID_CONN_LESS; |
| 237 | l2cap_pi(sk)->dcid = L2CAP_CID_CONN_LESS; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 238 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; |
| 239 | } else { |
| 240 | /* Raw socket can send/recv signalling messages only */ |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 241 | l2cap_pi(sk)->scid = L2CAP_CID_SIGNALING; |
| 242 | l2cap_pi(sk)->dcid = L2CAP_CID_SIGNALING; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 243 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; |
| 244 | } |
| 245 | |
| 246 | __l2cap_chan_link(l, sk); |
| 247 | |
| 248 | if (parent) |
| 249 | bt_accept_enqueue(parent, sk); |
| 250 | } |
| 251 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 252 | /* Delete channel. |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 253 | * Must be called on the locked socket. */ |
| 254 | static void l2cap_chan_del(struct sock *sk, int err) |
| 255 | { |
| 256 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 257 | struct sock *parent = bt_sk(sk)->parent; |
| 258 | |
| 259 | l2cap_sock_clear_timer(sk); |
| 260 | |
| 261 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); |
| 262 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 263 | if (conn) { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 264 | /* Unlink from channel list */ |
| 265 | l2cap_chan_unlink(&conn->chan_list, sk); |
| 266 | l2cap_pi(sk)->conn = NULL; |
| 267 | hci_conn_put(conn->hcon); |
| 268 | } |
| 269 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 270 | sk->sk_state = BT_CLOSED; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 271 | sock_set_flag(sk, SOCK_ZAPPED); |
| 272 | |
| 273 | if (err) |
| 274 | sk->sk_err = err; |
| 275 | |
| 276 | if (parent) { |
| 277 | bt_accept_unlink(sk); |
| 278 | parent->sk_data_ready(parent, 0); |
| 279 | } else |
| 280 | sk->sk_state_change(sk); |
| 281 | } |
| 282 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 283 | /* Service level security */ |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 284 | static inline int l2cap_check_security(struct sock *sk) |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 285 | { |
| 286 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
Marcel Holtmann | 0684e5f | 2009-02-09 02:48:38 +0100 | [diff] [blame] | 287 | __u8 auth_type; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 288 | |
Marcel Holtmann | 00ae4af | 2009-02-12 16:19:45 +0100 | [diff] [blame] | 289 | if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
| 290 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) |
| 291 | auth_type = HCI_AT_NO_BONDING_MITM; |
| 292 | else |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 293 | auth_type = HCI_AT_NO_BONDING; |
Marcel Holtmann | 00ae4af | 2009-02-12 16:19:45 +0100 | [diff] [blame] | 294 | |
| 295 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) |
| 296 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; |
| 297 | } else { |
| 298 | switch (l2cap_pi(sk)->sec_level) { |
| 299 | case BT_SECURITY_HIGH: |
| 300 | auth_type = HCI_AT_GENERAL_BONDING_MITM; |
| 301 | break; |
| 302 | case BT_SECURITY_MEDIUM: |
| 303 | auth_type = HCI_AT_GENERAL_BONDING; |
| 304 | break; |
| 305 | default: |
| 306 | auth_type = HCI_AT_NO_BONDING; |
| 307 | break; |
| 308 | } |
Marcel Holtmann | 0684e5f | 2009-02-09 02:48:38 +0100 | [diff] [blame] | 309 | } |
| 310 | |
| 311 | return hci_conn_security(conn->hcon, l2cap_pi(sk)->sec_level, |
| 312 | auth_type); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 313 | } |
| 314 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 315 | static inline u8 l2cap_get_ident(struct l2cap_conn *conn) |
| 316 | { |
| 317 | u8 id; |
| 318 | |
| 319 | /* Get next available identificator. |
| 320 | * 1 - 128 are used by kernel. |
| 321 | * 129 - 199 are reserved. |
| 322 | * 200 - 254 are used by utilities like l2ping, etc. |
| 323 | */ |
| 324 | |
| 325 | spin_lock_bh(&conn->lock); |
| 326 | |
| 327 | if (++conn->tx_ident > 128) |
| 328 | conn->tx_ident = 1; |
| 329 | |
| 330 | id = conn->tx_ident; |
| 331 | |
| 332 | spin_unlock_bh(&conn->lock); |
| 333 | |
| 334 | return id; |
| 335 | } |
| 336 | |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 337 | static inline 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] | 338 | { |
| 339 | struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); |
| 340 | |
| 341 | BT_DBG("code 0x%2.2x", code); |
| 342 | |
| 343 | if (!skb) |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 344 | return; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 345 | |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 346 | hci_send_acl(conn->hcon, skb, 0); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 347 | } |
| 348 | |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 349 | static inline void l2cap_send_sframe(struct l2cap_pinfo *pi, u16 control) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 350 | { |
| 351 | struct sk_buff *skb; |
| 352 | struct l2cap_hdr *lh; |
| 353 | struct l2cap_conn *conn = pi->conn; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 354 | int count, hlen = L2CAP_HDR_SIZE + 2; |
| 355 | |
| 356 | if (pi->fcs == L2CAP_FCS_CRC16) |
| 357 | hlen += 2; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 358 | |
| 359 | BT_DBG("pi %p, control 0x%2.2x", pi, control); |
| 360 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 361 | count = min_t(unsigned int, conn->mtu, hlen); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 362 | control |= L2CAP_CTRL_FRAME_TYPE; |
| 363 | |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 364 | if (pi->conn_state & L2CAP_CONN_SEND_FBIT) { |
| 365 | control |= L2CAP_CTRL_FINAL; |
| 366 | pi->conn_state &= ~L2CAP_CONN_SEND_FBIT; |
| 367 | } |
| 368 | |
Gustavo F. Padovan | f0946cc | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 369 | if (pi->conn_state & L2CAP_CONN_SEND_PBIT) { |
| 370 | control |= L2CAP_CTRL_POLL; |
| 371 | pi->conn_state &= ~L2CAP_CONN_SEND_PBIT; |
| 372 | } |
| 373 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 374 | skb = bt_skb_alloc(count, GFP_ATOMIC); |
| 375 | if (!skb) |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 376 | return; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 377 | |
| 378 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 379 | lh->len = cpu_to_le16(hlen - L2CAP_HDR_SIZE); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 380 | lh->cid = cpu_to_le16(pi->dcid); |
| 381 | put_unaligned_le16(control, skb_put(skb, 2)); |
| 382 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 383 | if (pi->fcs == L2CAP_FCS_CRC16) { |
| 384 | u16 fcs = crc16(0, (u8 *)lh, count - 2); |
| 385 | put_unaligned_le16(fcs, skb_put(skb, 2)); |
| 386 | } |
| 387 | |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 388 | hci_send_acl(pi->conn->hcon, skb, 0); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 389 | } |
| 390 | |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 391 | static inline void l2cap_send_rr_or_rnr(struct l2cap_pinfo *pi, u16 control) |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 392 | { |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 393 | if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) { |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 394 | control |= L2CAP_SUPER_RCV_NOT_READY; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 395 | pi->conn_state |= L2CAP_CONN_RNR_SENT; |
| 396 | } else |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 397 | control |= L2CAP_SUPER_RCV_READY; |
| 398 | |
Gustavo F. Padovan | 2ab25cd | 2009-10-03 02:34:40 -0300 | [diff] [blame] | 399 | control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
| 400 | |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 401 | l2cap_send_sframe(pi, control); |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 402 | } |
| 403 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 404 | static void l2cap_do_start(struct sock *sk) |
| 405 | { |
| 406 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 407 | |
| 408 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) { |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 409 | if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)) |
| 410 | return; |
| 411 | |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 412 | if (l2cap_check_security(sk)) { |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 413 | struct l2cap_conn_req req; |
| 414 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 415 | req.psm = l2cap_pi(sk)->psm; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 416 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 417 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 418 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 419 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 420 | L2CAP_CONN_REQ, sizeof(req), &req); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 421 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 422 | } else { |
| 423 | struct l2cap_info_req req; |
| 424 | req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 425 | |
| 426 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; |
| 427 | conn->info_ident = l2cap_get_ident(conn); |
| 428 | |
| 429 | mod_timer(&conn->info_timer, jiffies + |
| 430 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); |
| 431 | |
| 432 | l2cap_send_cmd(conn, conn->info_ident, |
| 433 | L2CAP_INFO_REQ, sizeof(req), &req); |
| 434 | } |
| 435 | } |
| 436 | |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 437 | static void l2cap_send_disconn_req(struct l2cap_conn *conn, struct sock *sk) |
| 438 | { |
| 439 | struct l2cap_disconn_req req; |
| 440 | |
| 441 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 442 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 443 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
| 444 | L2CAP_DISCONN_REQ, sizeof(req), &req); |
| 445 | } |
| 446 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | /* ---- L2CAP connections ---- */ |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 448 | static void l2cap_conn_start(struct l2cap_conn *conn) |
| 449 | { |
| 450 | struct l2cap_chan_list *l = &conn->chan_list; |
| 451 | struct sock *sk; |
| 452 | |
| 453 | BT_DBG("conn %p", conn); |
| 454 | |
| 455 | read_lock(&l->lock); |
| 456 | |
| 457 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
| 458 | bh_lock_sock(sk); |
| 459 | |
Gustavo F. Padovan | bd3c9e2 | 2010-05-01 16:15:42 -0300 | [diff] [blame] | 460 | if (sk->sk_type != SOCK_SEQPACKET && |
| 461 | sk->sk_type != SOCK_STREAM) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 462 | bh_unlock_sock(sk); |
| 463 | continue; |
| 464 | } |
| 465 | |
| 466 | if (sk->sk_state == BT_CONNECT) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 467 | if (l2cap_check_security(sk)) { |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 468 | struct l2cap_conn_req req; |
| 469 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 470 | req.psm = l2cap_pi(sk)->psm; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 471 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 472 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 473 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 474 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 475 | L2CAP_CONN_REQ, sizeof(req), &req); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 476 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 477 | } else if (sk->sk_state == BT_CONNECT2) { |
| 478 | struct l2cap_conn_rsp rsp; |
| 479 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 480 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 481 | |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 482 | if (l2cap_check_security(sk)) { |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 483 | if (bt_sk(sk)->defer_setup) { |
| 484 | struct sock *parent = bt_sk(sk)->parent; |
| 485 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); |
| 486 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHOR_PEND); |
| 487 | parent->sk_data_ready(parent, 0); |
| 488 | |
| 489 | } else { |
| 490 | sk->sk_state = BT_CONFIG; |
| 491 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); |
| 492 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 493 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 494 | } else { |
| 495 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); |
| 496 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHEN_PEND); |
| 497 | } |
| 498 | |
| 499 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
| 500 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
| 501 | } |
| 502 | |
| 503 | bh_unlock_sock(sk); |
| 504 | } |
| 505 | |
| 506 | read_unlock(&l->lock); |
| 507 | } |
| 508 | |
| 509 | static void l2cap_conn_ready(struct l2cap_conn *conn) |
| 510 | { |
| 511 | struct l2cap_chan_list *l = &conn->chan_list; |
| 512 | struct sock *sk; |
| 513 | |
| 514 | BT_DBG("conn %p", conn); |
| 515 | |
| 516 | read_lock(&l->lock); |
| 517 | |
| 518 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
| 519 | bh_lock_sock(sk); |
| 520 | |
Gustavo F. Padovan | bd3c9e2 | 2010-05-01 16:15:42 -0300 | [diff] [blame] | 521 | if (sk->sk_type != SOCK_SEQPACKET && |
| 522 | sk->sk_type != SOCK_STREAM) { |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 523 | l2cap_sock_clear_timer(sk); |
| 524 | sk->sk_state = BT_CONNECTED; |
| 525 | sk->sk_state_change(sk); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 526 | } else if (sk->sk_state == BT_CONNECT) |
| 527 | l2cap_do_start(sk); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 528 | |
| 529 | bh_unlock_sock(sk); |
| 530 | } |
| 531 | |
| 532 | read_unlock(&l->lock); |
| 533 | } |
| 534 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 535 | /* Notify sockets that we cannot guaranty reliability anymore */ |
| 536 | static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) |
| 537 | { |
| 538 | struct l2cap_chan_list *l = &conn->chan_list; |
| 539 | struct sock *sk; |
| 540 | |
| 541 | BT_DBG("conn %p", conn); |
| 542 | |
| 543 | read_lock(&l->lock); |
| 544 | |
| 545 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 546 | if (l2cap_pi(sk)->force_reliable) |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 547 | sk->sk_err = err; |
| 548 | } |
| 549 | |
| 550 | read_unlock(&l->lock); |
| 551 | } |
| 552 | |
| 553 | static void l2cap_info_timeout(unsigned long arg) |
| 554 | { |
| 555 | struct l2cap_conn *conn = (void *) arg; |
| 556 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 557 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 558 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 559 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 560 | l2cap_conn_start(conn); |
| 561 | } |
| 562 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) |
| 564 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 565 | struct l2cap_conn *conn = hcon->l2cap_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 567 | if (conn || status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | return conn; |
| 569 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 570 | conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC); |
| 571 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | |
| 574 | hcon->l2cap_data = conn; |
| 575 | conn->hcon = hcon; |
| 576 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 577 | BT_DBG("hcon %p conn %p", hcon, conn); |
| 578 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | conn->mtu = hcon->hdev->acl_mtu; |
| 580 | conn->src = &hcon->hdev->bdaddr; |
| 581 | conn->dst = &hcon->dst; |
| 582 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 583 | conn->feat_mask = 0; |
| 584 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | spin_lock_init(&conn->lock); |
| 586 | rwlock_init(&conn->chan_list.lock); |
| 587 | |
Dave Young | 45054dc | 2009-10-18 20:28:30 +0000 | [diff] [blame] | 588 | setup_timer(&conn->info_timer, l2cap_info_timeout, |
| 589 | (unsigned long) conn); |
| 590 | |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 591 | conn->disc_reason = 0x13; |
| 592 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | return conn; |
| 594 | } |
| 595 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 596 | static void l2cap_conn_del(struct hci_conn *hcon, int err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 598 | struct l2cap_conn *conn = hcon->l2cap_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | struct sock *sk; |
| 600 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 601 | if (!conn) |
| 602 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | |
| 604 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); |
| 605 | |
Wei Yongjun | 7585b97 | 2009-02-25 18:29:52 +0800 | [diff] [blame] | 606 | kfree_skb(conn->rx_skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | |
| 608 | /* Kill channels */ |
| 609 | while ((sk = conn->chan_list.head)) { |
| 610 | bh_lock_sock(sk); |
| 611 | l2cap_chan_del(sk, err); |
| 612 | bh_unlock_sock(sk); |
| 613 | l2cap_sock_kill(sk); |
| 614 | } |
| 615 | |
Dave Young | 8e8440f | 2008-03-03 12:18:55 -0800 | [diff] [blame] | 616 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) |
| 617 | del_timer_sync(&conn->info_timer); |
Thomas Gleixner | 3ab2273 | 2008-02-26 17:42:56 -0800 | [diff] [blame] | 618 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | hcon->l2cap_data = NULL; |
| 620 | kfree(conn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | } |
| 622 | |
| 623 | static inline void l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) |
| 624 | { |
| 625 | struct l2cap_chan_list *l = &conn->chan_list; |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 626 | write_lock_bh(&l->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | __l2cap_chan_add(conn, sk, parent); |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 628 | write_unlock_bh(&l->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | } |
| 630 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | /* ---- Socket interface ---- */ |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 632 | static struct sock *__l2cap_get_sock_by_addr(__le16 psm, bdaddr_t *src) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | { |
| 634 | struct sock *sk; |
| 635 | struct hlist_node *node; |
| 636 | sk_for_each(sk, node, &l2cap_sk_list.head) |
| 637 | if (l2cap_pi(sk)->sport == psm && !bacmp(&bt_sk(sk)->src, src)) |
| 638 | goto found; |
| 639 | sk = NULL; |
| 640 | found: |
| 641 | return sk; |
| 642 | } |
| 643 | |
| 644 | /* Find socket with psm and source bdaddr. |
| 645 | * Returns closest match. |
| 646 | */ |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 647 | static struct sock *__l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | { |
| 649 | struct sock *sk = NULL, *sk1 = NULL; |
| 650 | struct hlist_node *node; |
| 651 | |
| 652 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
| 653 | if (state && sk->sk_state != state) |
| 654 | continue; |
| 655 | |
| 656 | if (l2cap_pi(sk)->psm == psm) { |
| 657 | /* Exact match. */ |
| 658 | if (!bacmp(&bt_sk(sk)->src, src)) |
| 659 | break; |
| 660 | |
| 661 | /* Closest match */ |
| 662 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) |
| 663 | sk1 = sk; |
| 664 | } |
| 665 | } |
| 666 | return node ? sk : sk1; |
| 667 | } |
| 668 | |
| 669 | /* Find socket with given address (psm, src). |
| 670 | * Returns locked socket */ |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 671 | static inline struct sock *l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | { |
| 673 | struct sock *s; |
| 674 | read_lock(&l2cap_sk_list.lock); |
| 675 | s = __l2cap_get_sock_by_psm(state, psm, src); |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 676 | if (s) |
| 677 | bh_lock_sock(s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | read_unlock(&l2cap_sk_list.lock); |
| 679 | return s; |
| 680 | } |
| 681 | |
| 682 | static void l2cap_sock_destruct(struct sock *sk) |
| 683 | { |
| 684 | BT_DBG("sk %p", sk); |
| 685 | |
| 686 | skb_queue_purge(&sk->sk_receive_queue); |
| 687 | skb_queue_purge(&sk->sk_write_queue); |
| 688 | } |
| 689 | |
| 690 | static void l2cap_sock_cleanup_listen(struct sock *parent) |
| 691 | { |
| 692 | struct sock *sk; |
| 693 | |
| 694 | BT_DBG("parent %p", parent); |
| 695 | |
| 696 | /* Close not yet accepted channels */ |
| 697 | while ((sk = bt_accept_dequeue(parent, NULL))) |
| 698 | l2cap_sock_close(sk); |
| 699 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 700 | parent->sk_state = BT_CLOSED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | sock_set_flag(parent, SOCK_ZAPPED); |
| 702 | } |
| 703 | |
| 704 | /* Kill socket (only if zapped and orphan) |
| 705 | * Must be called on unlocked socket. |
| 706 | */ |
| 707 | static void l2cap_sock_kill(struct sock *sk) |
| 708 | { |
| 709 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) |
| 710 | return; |
| 711 | |
| 712 | BT_DBG("sk %p state %d", sk, sk->sk_state); |
| 713 | |
| 714 | /* Kill poor orphan */ |
| 715 | bt_sock_unlink(&l2cap_sk_list, sk); |
| 716 | sock_set_flag(sk, SOCK_DEAD); |
| 717 | sock_put(sk); |
| 718 | } |
| 719 | |
| 720 | static void __l2cap_sock_close(struct sock *sk, int reason) |
| 721 | { |
| 722 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); |
| 723 | |
| 724 | switch (sk->sk_state) { |
| 725 | case BT_LISTEN: |
| 726 | l2cap_sock_cleanup_listen(sk); |
| 727 | break; |
| 728 | |
| 729 | case BT_CONNECTED: |
| 730 | case BT_CONFIG: |
Gustavo F. Padovan | bd3c9e2 | 2010-05-01 16:15:42 -0300 | [diff] [blame] | 731 | if (sk->sk_type == SOCK_SEQPACKET || |
| 732 | sk->sk_type == SOCK_STREAM) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | |
| 735 | sk->sk_state = BT_DISCONN; |
| 736 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 737 | l2cap_send_disconn_req(conn, sk); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 738 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | l2cap_chan_del(sk, reason); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | break; |
| 741 | |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 742 | case BT_CONNECT2: |
Gustavo F. Padovan | bd3c9e2 | 2010-05-01 16:15:42 -0300 | [diff] [blame] | 743 | if (sk->sk_type == SOCK_SEQPACKET || |
| 744 | sk->sk_type == SOCK_STREAM) { |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 745 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 746 | struct l2cap_conn_rsp rsp; |
| 747 | __u16 result; |
| 748 | |
| 749 | if (bt_sk(sk)->defer_setup) |
| 750 | result = L2CAP_CR_SEC_BLOCK; |
| 751 | else |
| 752 | result = L2CAP_CR_BAD_PSM; |
| 753 | |
| 754 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 755 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 756 | rsp.result = cpu_to_le16(result); |
| 757 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 758 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
| 759 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
| 760 | } else |
| 761 | l2cap_chan_del(sk, reason); |
| 762 | break; |
| 763 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | case BT_CONNECT: |
| 765 | case BT_DISCONN: |
| 766 | l2cap_chan_del(sk, reason); |
| 767 | break; |
| 768 | |
| 769 | default: |
| 770 | sock_set_flag(sk, SOCK_ZAPPED); |
| 771 | break; |
| 772 | } |
| 773 | } |
| 774 | |
| 775 | /* Must be called on unlocked socket. */ |
| 776 | static void l2cap_sock_close(struct sock *sk) |
| 777 | { |
| 778 | l2cap_sock_clear_timer(sk); |
| 779 | lock_sock(sk); |
| 780 | __l2cap_sock_close(sk, ECONNRESET); |
| 781 | release_sock(sk); |
| 782 | l2cap_sock_kill(sk); |
| 783 | } |
| 784 | |
| 785 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) |
| 786 | { |
| 787 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 788 | |
| 789 | BT_DBG("sk %p", sk); |
| 790 | |
| 791 | if (parent) { |
| 792 | sk->sk_type = parent->sk_type; |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 793 | bt_sk(sk)->defer_setup = bt_sk(parent)->defer_setup; |
| 794 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | pi->imtu = l2cap_pi(parent)->imtu; |
| 796 | pi->omtu = l2cap_pi(parent)->omtu; |
Marcel Holtmann | c6b03cf | 2009-05-02 22:31:10 -0700 | [diff] [blame] | 797 | pi->mode = l2cap_pi(parent)->mode; |
| 798 | pi->fcs = l2cap_pi(parent)->fcs; |
Gustavo F. Padovan | 68d7f0c | 2010-05-01 16:15:41 -0300 | [diff] [blame] | 799 | pi->max_tx = l2cap_pi(parent)->max_tx; |
Gustavo F. Padovan | 14b5aa7 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 800 | pi->tx_win = l2cap_pi(parent)->tx_win; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 801 | pi->sec_level = l2cap_pi(parent)->sec_level; |
| 802 | pi->role_switch = l2cap_pi(parent)->role_switch; |
| 803 | pi->force_reliable = l2cap_pi(parent)->force_reliable; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | } else { |
| 805 | pi->imtu = L2CAP_DEFAULT_MTU; |
| 806 | pi->omtu = 0; |
Gustavo F. Padovan | bd3c9e2 | 2010-05-01 16:15:42 -0300 | [diff] [blame] | 807 | if (enable_ertm && sk->sk_type == SOCK_STREAM) |
| 808 | pi->mode = L2CAP_MODE_ERTM; |
| 809 | else |
| 810 | pi->mode = L2CAP_MODE_BASIC; |
Gustavo F. Padovan | 68d7f0c | 2010-05-01 16:15:41 -0300 | [diff] [blame] | 811 | pi->max_tx = max_transmit; |
Marcel Holtmann | c6b03cf | 2009-05-02 22:31:10 -0700 | [diff] [blame] | 812 | pi->fcs = L2CAP_FCS_CRC16; |
Gustavo F. Padovan | 369ba30 | 2010-05-01 16:15:41 -0300 | [diff] [blame] | 813 | pi->tx_win = tx_window; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 814 | pi->sec_level = BT_SECURITY_LOW; |
| 815 | pi->role_switch = 0; |
| 816 | pi->force_reliable = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | } |
| 818 | |
| 819 | /* Default config options */ |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 820 | pi->conf_len = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | pi->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
Dave Young | 45054dc | 2009-10-18 20:28:30 +0000 | [diff] [blame] | 822 | skb_queue_head_init(TX_QUEUE(sk)); |
| 823 | skb_queue_head_init(SREJ_QUEUE(sk)); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 824 | skb_queue_head_init(BUSY_QUEUE(sk)); |
Dave Young | 45054dc | 2009-10-18 20:28:30 +0000 | [diff] [blame] | 825 | INIT_LIST_HEAD(SREJ_LIST(sk)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | } |
| 827 | |
| 828 | static struct proto l2cap_proto = { |
| 829 | .name = "L2CAP", |
| 830 | .owner = THIS_MODULE, |
| 831 | .obj_size = sizeof(struct l2cap_pinfo) |
| 832 | }; |
| 833 | |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 834 | static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | { |
| 836 | struct sock *sk; |
| 837 | |
Pavel Emelyanov | 6257ff2 | 2007-11-01 00:39:31 -0700 | [diff] [blame] | 838 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | if (!sk) |
| 840 | return NULL; |
| 841 | |
| 842 | sock_init_data(sock, sk); |
| 843 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); |
| 844 | |
| 845 | sk->sk_destruct = l2cap_sock_destruct; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 846 | sk->sk_sndtimeo = msecs_to_jiffies(L2CAP_CONN_TIMEOUT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | |
| 848 | sock_reset_flag(sk, SOCK_ZAPPED); |
| 849 | |
| 850 | sk->sk_protocol = proto; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 851 | sk->sk_state = BT_OPEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 853 | setup_timer(&sk->sk_timer, l2cap_sock_timeout, (unsigned long) sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | |
| 855 | bt_sock_link(&l2cap_sk_list, sk); |
| 856 | return sk; |
| 857 | } |
| 858 | |
Eric Paris | 3f378b6 | 2009-11-05 22:18:14 -0800 | [diff] [blame] | 859 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, |
| 860 | int kern) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | { |
| 862 | struct sock *sk; |
| 863 | |
| 864 | BT_DBG("sock %p", sock); |
| 865 | |
| 866 | sock->state = SS_UNCONNECTED; |
| 867 | |
Gustavo F. Padovan | bd3c9e2 | 2010-05-01 16:15:42 -0300 | [diff] [blame] | 868 | if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) |
| 870 | return -ESOCKTNOSUPPORT; |
| 871 | |
Eric Paris | c84b326 | 2009-11-05 20:45:52 -0800 | [diff] [blame] | 872 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | return -EPERM; |
| 874 | |
| 875 | sock->ops = &l2cap_sock_ops; |
| 876 | |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 877 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | if (!sk) |
| 879 | return -ENOMEM; |
| 880 | |
| 881 | l2cap_sock_init(sk, NULL); |
| 882 | return 0; |
| 883 | } |
| 884 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 885 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | struct sock *sk = sock->sk; |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 888 | struct sockaddr_l2 la; |
| 889 | int len, err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 891 | BT_DBG("sk %p", sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | |
| 893 | if (!addr || addr->sa_family != AF_BLUETOOTH) |
| 894 | return -EINVAL; |
| 895 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 896 | memset(&la, 0, sizeof(la)); |
| 897 | len = min_t(unsigned int, sizeof(la), alen); |
| 898 | memcpy(&la, addr, len); |
| 899 | |
Marcel Holtmann | 2a517ca | 2009-02-16 03:20:31 +0100 | [diff] [blame] | 900 | if (la.l2_cid) |
| 901 | return -EINVAL; |
| 902 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | lock_sock(sk); |
| 904 | |
| 905 | if (sk->sk_state != BT_OPEN) { |
| 906 | err = -EBADFD; |
| 907 | goto done; |
| 908 | } |
| 909 | |
Marcel Holtmann | b4324b5 | 2009-06-07 18:06:51 +0200 | [diff] [blame] | 910 | if (la.l2_psm && __le16_to_cpu(la.l2_psm) < 0x1001 && |
Marcel Holtmann | 847641d | 2007-01-22 22:00:45 +0100 | [diff] [blame] | 911 | !capable(CAP_NET_BIND_SERVICE)) { |
| 912 | err = -EACCES; |
| 913 | goto done; |
| 914 | } |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 915 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | write_lock_bh(&l2cap_sk_list.lock); |
| 917 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 918 | if (la.l2_psm && __l2cap_get_sock_by_addr(la.l2_psm, &la.l2_bdaddr)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | err = -EADDRINUSE; |
| 920 | } else { |
| 921 | /* Save source address */ |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 922 | bacpy(&bt_sk(sk)->src, &la.l2_bdaddr); |
| 923 | l2cap_pi(sk)->psm = la.l2_psm; |
| 924 | l2cap_pi(sk)->sport = la.l2_psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | sk->sk_state = BT_BOUND; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 926 | |
Marcel Holtmann | b4324b5 | 2009-06-07 18:06:51 +0200 | [diff] [blame] | 927 | if (__le16_to_cpu(la.l2_psm) == 0x0001 || |
| 928 | __le16_to_cpu(la.l2_psm) == 0x0003) |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 929 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | } |
| 931 | |
| 932 | write_unlock_bh(&l2cap_sk_list.lock); |
| 933 | |
| 934 | done: |
| 935 | release_sock(sk); |
| 936 | return err; |
| 937 | } |
| 938 | |
| 939 | static int l2cap_do_connect(struct sock *sk) |
| 940 | { |
| 941 | bdaddr_t *src = &bt_sk(sk)->src; |
| 942 | bdaddr_t *dst = &bt_sk(sk)->dst; |
| 943 | struct l2cap_conn *conn; |
| 944 | struct hci_conn *hcon; |
| 945 | struct hci_dev *hdev; |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 946 | __u8 auth_type; |
Marcel Holtmann | 44d0e48 | 2009-04-20 07:09:16 +0200 | [diff] [blame] | 947 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 949 | BT_DBG("%s -> %s psm 0x%2.2x", batostr(src), batostr(dst), |
| 950 | l2cap_pi(sk)->psm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 952 | hdev = hci_get_route(dst, src); |
| 953 | if (!hdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | return -EHOSTUNREACH; |
| 955 | |
| 956 | hci_dev_lock_bh(hdev); |
| 957 | |
| 958 | err = -ENOMEM; |
| 959 | |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 960 | if (sk->sk_type == SOCK_RAW) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 961 | switch (l2cap_pi(sk)->sec_level) { |
| 962 | case BT_SECURITY_HIGH: |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 963 | auth_type = HCI_AT_DEDICATED_BONDING_MITM; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 964 | break; |
| 965 | case BT_SECURITY_MEDIUM: |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 966 | auth_type = HCI_AT_DEDICATED_BONDING; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 967 | break; |
| 968 | default: |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 969 | auth_type = HCI_AT_NO_BONDING; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 970 | break; |
| 971 | } |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 972 | } else if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 973 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 974 | auth_type = HCI_AT_NO_BONDING_MITM; |
| 975 | else |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 976 | auth_type = HCI_AT_NO_BONDING; |
Marcel Holtmann | 435fef2 | 2009-02-09 03:55:28 +0100 | [diff] [blame] | 977 | |
| 978 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) |
| 979 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 980 | } else { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 981 | switch (l2cap_pi(sk)->sec_level) { |
| 982 | case BT_SECURITY_HIGH: |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 983 | auth_type = HCI_AT_GENERAL_BONDING_MITM; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 984 | break; |
| 985 | case BT_SECURITY_MEDIUM: |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 986 | auth_type = HCI_AT_GENERAL_BONDING; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 987 | break; |
| 988 | default: |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 989 | auth_type = HCI_AT_NO_BONDING; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 990 | break; |
| 991 | } |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 992 | } |
| 993 | |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 994 | hcon = hci_connect(hdev, ACL_LINK, dst, |
| 995 | l2cap_pi(sk)->sec_level, auth_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | if (!hcon) |
| 997 | goto done; |
| 998 | |
| 999 | conn = l2cap_conn_add(hcon, 0); |
| 1000 | if (!conn) { |
| 1001 | hci_conn_put(hcon); |
| 1002 | goto done; |
| 1003 | } |
| 1004 | |
| 1005 | err = 0; |
| 1006 | |
| 1007 | /* Update source addr of the socket */ |
| 1008 | bacpy(src, conn->src); |
| 1009 | |
| 1010 | l2cap_chan_add(conn, sk, NULL); |
| 1011 | |
| 1012 | sk->sk_state = BT_CONNECT; |
| 1013 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); |
| 1014 | |
| 1015 | if (hcon->state == BT_CONNECTED) { |
Gustavo F. Padovan | bd3c9e2 | 2010-05-01 16:15:42 -0300 | [diff] [blame] | 1016 | if (sk->sk_type != SOCK_SEQPACKET && |
| 1017 | sk->sk_type != SOCK_STREAM) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1018 | l2cap_sock_clear_timer(sk); |
| 1019 | sk->sk_state = BT_CONNECTED; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1020 | } else |
| 1021 | l2cap_do_start(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | } |
| 1023 | |
| 1024 | done: |
| 1025 | hci_dev_unlock_bh(hdev); |
| 1026 | hci_dev_put(hdev); |
| 1027 | return err; |
| 1028 | } |
| 1029 | |
| 1030 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) |
| 1031 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | struct sock *sk = sock->sk; |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1033 | struct sockaddr_l2 la; |
| 1034 | int len, err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1035 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | BT_DBG("sk %p", sk); |
| 1037 | |
Changli Gao | 6503d96 | 2010-03-31 22:58:26 +0000 | [diff] [blame] | 1038 | if (!addr || alen < sizeof(addr->sa_family) || |
| 1039 | addr->sa_family != AF_BLUETOOTH) |
Marcel Holtmann | 2a517ca | 2009-02-16 03:20:31 +0100 | [diff] [blame] | 1040 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1042 | memset(&la, 0, sizeof(la)); |
| 1043 | len = min_t(unsigned int, sizeof(la), alen); |
| 1044 | memcpy(&la, addr, len); |
| 1045 | |
Marcel Holtmann | 2a517ca | 2009-02-16 03:20:31 +0100 | [diff] [blame] | 1046 | if (la.l2_cid) |
| 1047 | return -EINVAL; |
| 1048 | |
| 1049 | lock_sock(sk); |
| 1050 | |
Gustavo F. Padovan | bd3c9e2 | 2010-05-01 16:15:42 -0300 | [diff] [blame] | 1051 | if ((sk->sk_type == SOCK_SEQPACKET || sk->sk_type == SOCK_STREAM) |
| 1052 | && !la.l2_psm) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | err = -EINVAL; |
| 1054 | goto done; |
| 1055 | } |
| 1056 | |
Marcel Holtmann | c6b03cf | 2009-05-02 22:31:10 -0700 | [diff] [blame] | 1057 | switch (l2cap_pi(sk)->mode) { |
| 1058 | case L2CAP_MODE_BASIC: |
| 1059 | break; |
| 1060 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1061 | case L2CAP_MODE_STREAMING: |
Marcel Holtmann | c6b03cf | 2009-05-02 22:31:10 -0700 | [diff] [blame] | 1062 | if (enable_ertm) |
| 1063 | break; |
| 1064 | /* fall through */ |
| 1065 | default: |
| 1066 | err = -ENOTSUPP; |
| 1067 | goto done; |
| 1068 | } |
| 1069 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 1070 | switch (sk->sk_state) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | case BT_CONNECT: |
| 1072 | case BT_CONNECT2: |
| 1073 | case BT_CONFIG: |
| 1074 | /* Already connecting */ |
| 1075 | goto wait; |
| 1076 | |
| 1077 | case BT_CONNECTED: |
| 1078 | /* Already connected */ |
| 1079 | goto done; |
| 1080 | |
| 1081 | case BT_OPEN: |
| 1082 | case BT_BOUND: |
| 1083 | /* Can connect */ |
| 1084 | break; |
| 1085 | |
| 1086 | default: |
| 1087 | err = -EBADFD; |
| 1088 | goto done; |
| 1089 | } |
| 1090 | |
| 1091 | /* Set destination address and psm */ |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1092 | bacpy(&bt_sk(sk)->dst, &la.l2_bdaddr); |
| 1093 | l2cap_pi(sk)->psm = la.l2_psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 1095 | err = l2cap_do_connect(sk); |
| 1096 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1097 | goto done; |
| 1098 | |
| 1099 | wait: |
| 1100 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
| 1101 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
| 1102 | done: |
| 1103 | release_sock(sk); |
| 1104 | return err; |
| 1105 | } |
| 1106 | |
| 1107 | static int l2cap_sock_listen(struct socket *sock, int backlog) |
| 1108 | { |
| 1109 | struct sock *sk = sock->sk; |
| 1110 | int err = 0; |
| 1111 | |
| 1112 | BT_DBG("sk %p backlog %d", sk, backlog); |
| 1113 | |
| 1114 | lock_sock(sk); |
| 1115 | |
Gustavo F. Padovan | bd3c9e2 | 2010-05-01 16:15:42 -0300 | [diff] [blame] | 1116 | if ((sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM) |
| 1117 | || sk->sk_state != BT_BOUND) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1118 | err = -EBADFD; |
| 1119 | goto done; |
| 1120 | } |
| 1121 | |
Marcel Holtmann | c6b03cf | 2009-05-02 22:31:10 -0700 | [diff] [blame] | 1122 | switch (l2cap_pi(sk)->mode) { |
| 1123 | case L2CAP_MODE_BASIC: |
| 1124 | break; |
| 1125 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1126 | case L2CAP_MODE_STREAMING: |
Marcel Holtmann | c6b03cf | 2009-05-02 22:31:10 -0700 | [diff] [blame] | 1127 | if (enable_ertm) |
| 1128 | break; |
| 1129 | /* fall through */ |
| 1130 | default: |
| 1131 | err = -ENOTSUPP; |
| 1132 | goto done; |
| 1133 | } |
| 1134 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | if (!l2cap_pi(sk)->psm) { |
| 1136 | bdaddr_t *src = &bt_sk(sk)->src; |
| 1137 | u16 psm; |
| 1138 | |
| 1139 | err = -EINVAL; |
| 1140 | |
| 1141 | write_lock_bh(&l2cap_sk_list.lock); |
| 1142 | |
| 1143 | for (psm = 0x1001; psm < 0x1100; psm += 2) |
Marcel Holtmann | b4324b5 | 2009-06-07 18:06:51 +0200 | [diff] [blame] | 1144 | if (!__l2cap_get_sock_by_addr(cpu_to_le16(psm), src)) { |
| 1145 | l2cap_pi(sk)->psm = cpu_to_le16(psm); |
| 1146 | l2cap_pi(sk)->sport = cpu_to_le16(psm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | err = 0; |
| 1148 | break; |
| 1149 | } |
| 1150 | |
| 1151 | write_unlock_bh(&l2cap_sk_list.lock); |
| 1152 | |
| 1153 | if (err < 0) |
| 1154 | goto done; |
| 1155 | } |
| 1156 | |
| 1157 | sk->sk_max_ack_backlog = backlog; |
| 1158 | sk->sk_ack_backlog = 0; |
| 1159 | sk->sk_state = BT_LISTEN; |
| 1160 | |
| 1161 | done: |
| 1162 | release_sock(sk); |
| 1163 | return err; |
| 1164 | } |
| 1165 | |
| 1166 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) |
| 1167 | { |
| 1168 | DECLARE_WAITQUEUE(wait, current); |
| 1169 | struct sock *sk = sock->sk, *nsk; |
| 1170 | long timeo; |
| 1171 | int err = 0; |
| 1172 | |
Peter Zijlstra | fcc70d5 | 2006-11-08 22:44:35 -0800 | [diff] [blame] | 1173 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | |
| 1175 | if (sk->sk_state != BT_LISTEN) { |
| 1176 | err = -EBADFD; |
| 1177 | goto done; |
| 1178 | } |
| 1179 | |
| 1180 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
| 1181 | |
| 1182 | BT_DBG("sk %p timeo %ld", sk, timeo); |
| 1183 | |
| 1184 | /* Wait for an incoming connection. (wake-one). */ |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 1185 | add_wait_queue_exclusive(sk_sleep(sk), &wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | while (!(nsk = bt_accept_dequeue(sk, newsock))) { |
| 1187 | set_current_state(TASK_INTERRUPTIBLE); |
| 1188 | if (!timeo) { |
| 1189 | err = -EAGAIN; |
| 1190 | break; |
| 1191 | } |
| 1192 | |
| 1193 | release_sock(sk); |
| 1194 | timeo = schedule_timeout(timeo); |
Peter Zijlstra | fcc70d5 | 2006-11-08 22:44:35 -0800 | [diff] [blame] | 1195 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | |
| 1197 | if (sk->sk_state != BT_LISTEN) { |
| 1198 | err = -EBADFD; |
| 1199 | break; |
| 1200 | } |
| 1201 | |
| 1202 | if (signal_pending(current)) { |
| 1203 | err = sock_intr_errno(timeo); |
| 1204 | break; |
| 1205 | } |
| 1206 | } |
| 1207 | set_current_state(TASK_RUNNING); |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 1208 | remove_wait_queue(sk_sleep(sk), &wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | |
| 1210 | if (err) |
| 1211 | goto done; |
| 1212 | |
| 1213 | newsock->state = SS_CONNECTED; |
| 1214 | |
| 1215 | BT_DBG("new socket %p", nsk); |
| 1216 | |
| 1217 | done: |
| 1218 | release_sock(sk); |
| 1219 | return err; |
| 1220 | } |
| 1221 | |
| 1222 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) |
| 1223 | { |
| 1224 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; |
| 1225 | struct sock *sk = sock->sk; |
| 1226 | |
| 1227 | BT_DBG("sock %p, sk %p", sock, sk); |
| 1228 | |
| 1229 | addr->sa_family = AF_BLUETOOTH; |
| 1230 | *len = sizeof(struct sockaddr_l2); |
| 1231 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1232 | if (peer) { |
| 1233 | la->l2_psm = l2cap_pi(sk)->psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); |
Marcel Holtmann | b4324b5 | 2009-06-07 18:06:51 +0200 | [diff] [blame] | 1235 | la->l2_cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1236 | } else { |
| 1237 | la->l2_psm = l2cap_pi(sk)->sport; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1238 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); |
Marcel Holtmann | b4324b5 | 2009-06-07 18:06:51 +0200 | [diff] [blame] | 1239 | la->l2_cid = cpu_to_le16(l2cap_pi(sk)->scid); |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1240 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1242 | return 0; |
| 1243 | } |
| 1244 | |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame^] | 1245 | static int __l2cap_wait_ack(struct sock *sk) |
| 1246 | { |
| 1247 | DECLARE_WAITQUEUE(wait, current); |
| 1248 | int err = 0; |
| 1249 | int timeo = HZ/5; |
| 1250 | |
| 1251 | add_wait_queue(sk->sk_sleep, &wait); |
| 1252 | while ((l2cap_pi(sk)->unacked_frames > 0 && l2cap_pi(sk)->conn)) { |
| 1253 | set_current_state(TASK_INTERRUPTIBLE); |
| 1254 | |
| 1255 | if (!timeo) |
| 1256 | timeo = HZ/5; |
| 1257 | |
| 1258 | if (signal_pending(current)) { |
| 1259 | err = sock_intr_errno(timeo); |
| 1260 | break; |
| 1261 | } |
| 1262 | |
| 1263 | release_sock(sk); |
| 1264 | timeo = schedule_timeout(timeo); |
| 1265 | lock_sock(sk); |
| 1266 | |
| 1267 | err = sock_error(sk); |
| 1268 | if (err) |
| 1269 | break; |
| 1270 | } |
| 1271 | set_current_state(TASK_RUNNING); |
| 1272 | remove_wait_queue(sk->sk_sleep, &wait); |
| 1273 | return err; |
| 1274 | } |
| 1275 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1276 | static void l2cap_monitor_timeout(unsigned long arg) |
| 1277 | { |
| 1278 | struct sock *sk = (void *) arg; |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1279 | |
Gustavo F. Padovan | e686219 | 2009-08-24 00:45:19 -0300 | [diff] [blame] | 1280 | bh_lock_sock(sk); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1281 | if (l2cap_pi(sk)->retry_count >= l2cap_pi(sk)->remote_max_tx) { |
| 1282 | l2cap_send_disconn_req(l2cap_pi(sk)->conn, sk); |
Andrei Emeltchenko | b13f586 | 2009-12-15 11:38:04 +0200 | [diff] [blame] | 1283 | bh_unlock_sock(sk); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1284 | return; |
| 1285 | } |
| 1286 | |
| 1287 | l2cap_pi(sk)->retry_count++; |
| 1288 | __mod_monitor_timer(); |
| 1289 | |
Gustavo F. Padovan | a2e12a2 | 2010-05-05 19:58:27 -0300 | [diff] [blame] | 1290 | l2cap_send_rr_or_rnr(l2cap_pi(sk), L2CAP_CTRL_POLL); |
Gustavo F. Padovan | e686219 | 2009-08-24 00:45:19 -0300 | [diff] [blame] | 1291 | bh_unlock_sock(sk); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1292 | } |
| 1293 | |
| 1294 | static void l2cap_retrans_timeout(unsigned long arg) |
| 1295 | { |
| 1296 | struct sock *sk = (void *) arg; |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1297 | |
Gustavo F. Padovan | e686219 | 2009-08-24 00:45:19 -0300 | [diff] [blame] | 1298 | bh_lock_sock(sk); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1299 | l2cap_pi(sk)->retry_count = 1; |
| 1300 | __mod_monitor_timer(); |
| 1301 | |
| 1302 | l2cap_pi(sk)->conn_state |= L2CAP_CONN_WAIT_F; |
| 1303 | |
Gustavo F. Padovan | a2e12a2 | 2010-05-05 19:58:27 -0300 | [diff] [blame] | 1304 | l2cap_send_rr_or_rnr(l2cap_pi(sk), L2CAP_CTRL_POLL); |
Gustavo F. Padovan | e686219 | 2009-08-24 00:45:19 -0300 | [diff] [blame] | 1305 | bh_unlock_sock(sk); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1306 | } |
| 1307 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1308 | static void l2cap_drop_acked_frames(struct sock *sk) |
| 1309 | { |
| 1310 | struct sk_buff *skb; |
| 1311 | |
Gustavo F. Padovan | 812e737 | 2010-05-01 16:15:42 -0300 | [diff] [blame] | 1312 | while ((skb = skb_peek(TX_QUEUE(sk))) && |
| 1313 | l2cap_pi(sk)->unacked_frames) { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1314 | if (bt_cb(skb)->tx_seq == l2cap_pi(sk)->expected_ack_seq) |
| 1315 | break; |
| 1316 | |
| 1317 | skb = skb_dequeue(TX_QUEUE(sk)); |
| 1318 | kfree_skb(skb); |
| 1319 | |
| 1320 | l2cap_pi(sk)->unacked_frames--; |
| 1321 | } |
| 1322 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1323 | if (!l2cap_pi(sk)->unacked_frames) |
| 1324 | del_timer(&l2cap_pi(sk)->retrans_timer); |
| 1325 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1326 | return; |
| 1327 | } |
| 1328 | |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1329 | static inline void l2cap_do_send(struct sock *sk, struct sk_buff *skb) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1330 | { |
| 1331 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1332 | |
| 1333 | BT_DBG("sk %p, skb %p len %d", sk, skb, skb->len); |
| 1334 | |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1335 | hci_send_acl(pi->conn->hcon, skb, 0); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1336 | } |
| 1337 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1338 | static int l2cap_streaming_send(struct sock *sk) |
| 1339 | { |
| 1340 | struct sk_buff *skb, *tx_skb; |
| 1341 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1342 | u16 control, fcs; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1343 | |
| 1344 | while ((skb = sk->sk_send_head)) { |
| 1345 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
| 1346 | |
| 1347 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); |
| 1348 | control |= pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT; |
| 1349 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); |
| 1350 | |
Gustavo F. Padovan | e8235c6 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 1351 | if (pi->fcs == L2CAP_FCS_CRC16) { |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1352 | fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2); |
| 1353 | put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2); |
| 1354 | } |
| 1355 | |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1356 | l2cap_do_send(sk, tx_skb); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1357 | |
| 1358 | pi->next_tx_seq = (pi->next_tx_seq + 1) % 64; |
| 1359 | |
| 1360 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) |
| 1361 | sk->sk_send_head = NULL; |
| 1362 | else |
| 1363 | sk->sk_send_head = skb_queue_next(TX_QUEUE(sk), skb); |
| 1364 | |
| 1365 | skb = skb_dequeue(TX_QUEUE(sk)); |
| 1366 | kfree_skb(skb); |
| 1367 | } |
| 1368 | return 0; |
| 1369 | } |
| 1370 | |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1371 | static void l2cap_retransmit_frame(struct sock *sk, u8 tx_seq) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1372 | { |
| 1373 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 1374 | struct sk_buff *skb, *tx_skb; |
| 1375 | u16 control, fcs; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1376 | |
| 1377 | skb = skb_peek(TX_QUEUE(sk)); |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1378 | if (!skb) |
| 1379 | return; |
| 1380 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1381 | do { |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1382 | if (bt_cb(skb)->tx_seq == tx_seq) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1383 | break; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1384 | |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1385 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) |
| 1386 | return; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1387 | |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1388 | } while ((skb = skb_queue_next(TX_QUEUE(sk), skb))); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1389 | |
Gustavo F. Padovan | f11d676 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1390 | if (pi->remote_max_tx && |
| 1391 | bt_cb(skb)->retries == pi->remote_max_tx) { |
| 1392 | l2cap_send_disconn_req(pi->conn, sk); |
| 1393 | return; |
| 1394 | } |
| 1395 | |
| 1396 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
| 1397 | bt_cb(skb)->retries++; |
| 1398 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); |
| 1399 | control |= (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT) |
| 1400 | | (tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); |
| 1401 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); |
| 1402 | |
| 1403 | if (pi->fcs == L2CAP_FCS_CRC16) { |
| 1404 | fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2); |
| 1405 | put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2); |
| 1406 | } |
| 1407 | |
| 1408 | l2cap_do_send(sk, tx_skb); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1409 | } |
| 1410 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1411 | static int l2cap_ertm_send(struct sock *sk) |
| 1412 | { |
| 1413 | struct sk_buff *skb, *tx_skb; |
| 1414 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1415 | u16 control, fcs; |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1416 | int nsent = 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1417 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1418 | if (pi->conn_state & L2CAP_CONN_WAIT_F) |
| 1419 | return 0; |
| 1420 | |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 1421 | while ((skb = sk->sk_send_head) && (!l2cap_tx_window_full(sk)) && |
Gustavo F. Padovan | 59203a2 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1422 | !(pi->conn_state & L2CAP_CONN_REMOTE_BUSY)) { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1423 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1424 | if (pi->remote_max_tx && |
| 1425 | bt_cb(skb)->retries == pi->remote_max_tx) { |
| 1426 | l2cap_send_disconn_req(pi->conn, sk); |
| 1427 | break; |
| 1428 | } |
| 1429 | |
Andrei Emeltchenko | e420aba | 2009-12-23 13:07:14 +0200 | [diff] [blame] | 1430 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
| 1431 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1432 | bt_cb(skb)->retries++; |
| 1433 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1434 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 1435 | if (pi->conn_state & L2CAP_CONN_SEND_FBIT) { |
| 1436 | control |= L2CAP_CTRL_FINAL; |
| 1437 | pi->conn_state &= ~L2CAP_CONN_SEND_FBIT; |
| 1438 | } |
Gustavo F. Padovan | 9f121a5 | 2009-10-03 02:34:38 -0300 | [diff] [blame] | 1439 | control |= (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1440 | | (pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); |
| 1441 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); |
| 1442 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1443 | |
Gustavo F. Padovan | e8235c6 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 1444 | if (pi->fcs == L2CAP_FCS_CRC16) { |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1445 | fcs = crc16(0, (u8 *)skb->data, tx_skb->len - 2); |
| 1446 | put_unaligned_le16(fcs, skb->data + tx_skb->len - 2); |
| 1447 | } |
| 1448 | |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1449 | l2cap_do_send(sk, tx_skb); |
| 1450 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1451 | __mod_retrans_timer(); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1452 | |
| 1453 | bt_cb(skb)->tx_seq = pi->next_tx_seq; |
| 1454 | pi->next_tx_seq = (pi->next_tx_seq + 1) % 64; |
| 1455 | |
| 1456 | pi->unacked_frames++; |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 1457 | pi->frames_sent++; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1458 | |
| 1459 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) |
| 1460 | sk->sk_send_head = NULL; |
| 1461 | else |
| 1462 | sk->sk_send_head = skb_queue_next(TX_QUEUE(sk), skb); |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1463 | |
| 1464 | nsent++; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1465 | } |
| 1466 | |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1467 | return nsent; |
| 1468 | } |
| 1469 | |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1470 | static void l2cap_send_ack(struct l2cap_pinfo *pi) |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1471 | { |
| 1472 | struct sock *sk = (struct sock *)pi; |
| 1473 | u16 control = 0; |
| 1474 | |
| 1475 | control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
| 1476 | |
| 1477 | if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) { |
| 1478 | control |= L2CAP_SUPER_RCV_NOT_READY; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 1479 | pi->conn_state |= L2CAP_CONN_RNR_SENT; |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1480 | l2cap_send_sframe(pi, control); |
| 1481 | return; |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1482 | } else if (l2cap_ertm_send(sk) == 0) { |
| 1483 | control |= L2CAP_SUPER_RCV_READY; |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1484 | l2cap_send_sframe(pi, control); |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1485 | } |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1486 | } |
| 1487 | |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1488 | static void l2cap_send_srejtail(struct sock *sk) |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 1489 | { |
| 1490 | struct srej_list *tail; |
| 1491 | u16 control; |
| 1492 | |
| 1493 | control = L2CAP_SUPER_SELECT_REJECT; |
| 1494 | control |= L2CAP_CTRL_FINAL; |
| 1495 | |
| 1496 | tail = list_entry(SREJ_LIST(sk)->prev, struct srej_list, list); |
| 1497 | control |= tail->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
| 1498 | |
| 1499 | l2cap_send_sframe(l2cap_pi(sk), control); |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 1500 | } |
| 1501 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1502 | 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] | 1503 | { |
| 1504 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1505 | struct sk_buff **frag; |
| 1506 | int err, sent = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1507 | |
Gustavo F. Padovan | 59203a2 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1508 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1509 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1510 | |
| 1511 | sent += count; |
| 1512 | len -= count; |
| 1513 | |
| 1514 | /* Continuation fragments (no L2CAP header) */ |
| 1515 | frag = &skb_shinfo(skb)->frag_list; |
| 1516 | while (len) { |
| 1517 | count = min_t(unsigned int, conn->mtu, len); |
| 1518 | |
| 1519 | *frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err); |
| 1520 | if (!*frag) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1521 | return -EFAULT; |
| 1522 | if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) |
| 1523 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1524 | |
| 1525 | sent += count; |
| 1526 | len -= count; |
| 1527 | |
| 1528 | frag = &(*frag)->next; |
| 1529 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1530 | |
| 1531 | return sent; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1532 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1533 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1534 | static struct sk_buff *l2cap_create_connless_pdu(struct sock *sk, struct msghdr *msg, size_t len) |
| 1535 | { |
| 1536 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 1537 | struct sk_buff *skb; |
| 1538 | int err, count, hlen = L2CAP_HDR_SIZE + 2; |
| 1539 | struct l2cap_hdr *lh; |
| 1540 | |
| 1541 | BT_DBG("sk %p len %d", sk, (int)len); |
| 1542 | |
| 1543 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
| 1544 | skb = bt_skb_send_alloc(sk, count + hlen, |
| 1545 | msg->msg_flags & MSG_DONTWAIT, &err); |
| 1546 | if (!skb) |
| 1547 | return ERR_PTR(-ENOMEM); |
| 1548 | |
| 1549 | /* Create L2CAP header */ |
| 1550 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
| 1551 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 1552 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); |
| 1553 | put_unaligned_le16(l2cap_pi(sk)->psm, skb_put(skb, 2)); |
| 1554 | |
| 1555 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); |
| 1556 | if (unlikely(err < 0)) { |
| 1557 | kfree_skb(skb); |
| 1558 | return ERR_PTR(err); |
| 1559 | } |
| 1560 | return skb; |
| 1561 | } |
| 1562 | |
| 1563 | static struct sk_buff *l2cap_create_basic_pdu(struct sock *sk, struct msghdr *msg, size_t len) |
| 1564 | { |
| 1565 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 1566 | struct sk_buff *skb; |
| 1567 | int err, count, hlen = L2CAP_HDR_SIZE; |
| 1568 | struct l2cap_hdr *lh; |
| 1569 | |
| 1570 | BT_DBG("sk %p len %d", sk, (int)len); |
| 1571 | |
| 1572 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
| 1573 | skb = bt_skb_send_alloc(sk, count + hlen, |
| 1574 | msg->msg_flags & MSG_DONTWAIT, &err); |
| 1575 | if (!skb) |
| 1576 | return ERR_PTR(-ENOMEM); |
| 1577 | |
| 1578 | /* Create L2CAP header */ |
| 1579 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
| 1580 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 1581 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); |
| 1582 | |
| 1583 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); |
| 1584 | if (unlikely(err < 0)) { |
| 1585 | kfree_skb(skb); |
| 1586 | return ERR_PTR(err); |
| 1587 | } |
| 1588 | return skb; |
| 1589 | } |
| 1590 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1591 | static struct sk_buff *l2cap_create_iframe_pdu(struct sock *sk, struct msghdr *msg, size_t len, u16 control, u16 sdulen) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1592 | { |
| 1593 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 1594 | struct sk_buff *skb; |
| 1595 | int err, count, hlen = L2CAP_HDR_SIZE + 2; |
| 1596 | struct l2cap_hdr *lh; |
| 1597 | |
| 1598 | BT_DBG("sk %p len %d", sk, (int)len); |
| 1599 | |
Gustavo F. Padovan | 0ee0d20 | 2010-05-01 16:15:41 -0300 | [diff] [blame] | 1600 | if (!conn) |
| 1601 | return ERR_PTR(-ENOTCONN); |
| 1602 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1603 | if (sdulen) |
| 1604 | hlen += 2; |
| 1605 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1606 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) |
| 1607 | hlen += 2; |
| 1608 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1609 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
| 1610 | skb = bt_skb_send_alloc(sk, count + hlen, |
| 1611 | msg->msg_flags & MSG_DONTWAIT, &err); |
| 1612 | if (!skb) |
| 1613 | return ERR_PTR(-ENOMEM); |
| 1614 | |
| 1615 | /* Create L2CAP header */ |
| 1616 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
| 1617 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 1618 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); |
| 1619 | put_unaligned_le16(control, skb_put(skb, 2)); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1620 | if (sdulen) |
| 1621 | put_unaligned_le16(sdulen, skb_put(skb, 2)); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1622 | |
| 1623 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); |
| 1624 | if (unlikely(err < 0)) { |
| 1625 | kfree_skb(skb); |
| 1626 | return ERR_PTR(err); |
| 1627 | } |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1628 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1629 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) |
| 1630 | put_unaligned_le16(0, skb_put(skb, 2)); |
| 1631 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1632 | bt_cb(skb)->retries = 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1633 | return skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1634 | } |
| 1635 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1636 | static inline int l2cap_sar_segment_sdu(struct sock *sk, struct msghdr *msg, size_t len) |
| 1637 | { |
| 1638 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 1639 | struct sk_buff *skb; |
| 1640 | struct sk_buff_head sar_queue; |
| 1641 | u16 control; |
| 1642 | size_t size = 0; |
| 1643 | |
Gustavo F. Padovan | ff12fd6 | 2010-05-05 22:09:15 -0300 | [diff] [blame] | 1644 | skb_queue_head_init(&sar_queue); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1645 | control = L2CAP_SDU_START; |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 1646 | skb = l2cap_create_iframe_pdu(sk, msg, pi->remote_mps, control, len); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1647 | if (IS_ERR(skb)) |
| 1648 | return PTR_ERR(skb); |
| 1649 | |
| 1650 | __skb_queue_tail(&sar_queue, skb); |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 1651 | len -= pi->remote_mps; |
| 1652 | size += pi->remote_mps; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1653 | |
| 1654 | while (len > 0) { |
| 1655 | size_t buflen; |
| 1656 | |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 1657 | if (len > pi->remote_mps) { |
Gustavo F. Padovan | 44651b8 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1658 | control = L2CAP_SDU_CONTINUE; |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 1659 | buflen = pi->remote_mps; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1660 | } else { |
Gustavo F. Padovan | 44651b8 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1661 | control = L2CAP_SDU_END; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1662 | buflen = len; |
| 1663 | } |
| 1664 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1665 | skb = l2cap_create_iframe_pdu(sk, msg, buflen, control, 0); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1666 | if (IS_ERR(skb)) { |
| 1667 | skb_queue_purge(&sar_queue); |
| 1668 | return PTR_ERR(skb); |
| 1669 | } |
| 1670 | |
| 1671 | __skb_queue_tail(&sar_queue, skb); |
| 1672 | len -= buflen; |
| 1673 | size += buflen; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1674 | } |
| 1675 | skb_queue_splice_tail(&sar_queue, TX_QUEUE(sk)); |
| 1676 | if (sk->sk_send_head == NULL) |
| 1677 | sk->sk_send_head = sar_queue.next; |
| 1678 | |
| 1679 | return size; |
| 1680 | } |
| 1681 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1682 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) |
| 1683 | { |
| 1684 | struct sock *sk = sock->sk; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1685 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 1686 | struct sk_buff *skb; |
| 1687 | u16 control; |
| 1688 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1689 | |
| 1690 | BT_DBG("sock %p, sk %p", sock, sk); |
| 1691 | |
Benjamin LaHaise | c1cbe4b | 2005-12-13 23:22:19 -0800 | [diff] [blame] | 1692 | err = sock_error(sk); |
| 1693 | if (err) |
| 1694 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1695 | |
| 1696 | if (msg->msg_flags & MSG_OOB) |
| 1697 | return -EOPNOTSUPP; |
| 1698 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1699 | lock_sock(sk); |
| 1700 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1701 | if (sk->sk_state != BT_CONNECTED) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1702 | err = -ENOTCONN; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1703 | goto done; |
| 1704 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1705 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1706 | /* Connectionless channel */ |
| 1707 | if (sk->sk_type == SOCK_DGRAM) { |
| 1708 | skb = l2cap_create_connless_pdu(sk, msg, len); |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1709 | if (IS_ERR(skb)) { |
Dan Carpenter | 477fffb | 2010-04-21 23:52:01 +0000 | [diff] [blame] | 1710 | err = PTR_ERR(skb); |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1711 | } else { |
| 1712 | l2cap_do_send(sk, skb); |
| 1713 | err = len; |
| 1714 | } |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1715 | goto done; |
| 1716 | } |
| 1717 | |
| 1718 | switch (pi->mode) { |
| 1719 | case L2CAP_MODE_BASIC: |
Gustavo F. Padovan | c69163e | 2010-05-01 16:15:35 -0300 | [diff] [blame] | 1720 | /* Check outgoing MTU */ |
| 1721 | if (len > pi->omtu) { |
| 1722 | err = -EINVAL; |
| 1723 | goto done; |
| 1724 | } |
| 1725 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1726 | /* Create a basic PDU */ |
| 1727 | skb = l2cap_create_basic_pdu(sk, msg, len); |
| 1728 | if (IS_ERR(skb)) { |
| 1729 | err = PTR_ERR(skb); |
| 1730 | goto done; |
| 1731 | } |
| 1732 | |
Gustavo F. Padovan | 9a9c6a3 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 1733 | l2cap_do_send(sk, skb); |
| 1734 | err = len; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1735 | break; |
| 1736 | |
| 1737 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1738 | case L2CAP_MODE_STREAMING: |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1739 | /* Entire SDU fits into one PDU */ |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 1740 | if (len <= pi->remote_mps) { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1741 | control = L2CAP_SDU_UNSEGMENTED; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1742 | skb = l2cap_create_iframe_pdu(sk, msg, len, control, 0); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1743 | if (IS_ERR(skb)) { |
| 1744 | err = PTR_ERR(skb); |
| 1745 | goto done; |
| 1746 | } |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1747 | __skb_queue_tail(TX_QUEUE(sk), skb); |
| 1748 | if (sk->sk_send_head == NULL) |
| 1749 | sk->sk_send_head = skb; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1750 | } else { |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1751 | /* Segment SDU into multiples PDUs */ |
| 1752 | err = l2cap_sar_segment_sdu(sk, msg, len); |
| 1753 | if (err < 0) |
| 1754 | goto done; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1755 | } |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1756 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1757 | if (pi->mode == L2CAP_MODE_STREAMING) |
| 1758 | err = l2cap_streaming_send(sk); |
| 1759 | else |
| 1760 | err = l2cap_ertm_send(sk); |
| 1761 | |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1762 | if (err >= 0) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1763 | err = len; |
| 1764 | break; |
| 1765 | |
| 1766 | default: |
| 1767 | BT_DBG("bad state %1.1x", pi->mode); |
| 1768 | err = -EINVAL; |
| 1769 | } |
| 1770 | |
| 1771 | done: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1772 | release_sock(sk); |
| 1773 | return err; |
| 1774 | } |
| 1775 | |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 1776 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) |
| 1777 | { |
| 1778 | struct sock *sk = sock->sk; |
| 1779 | |
| 1780 | lock_sock(sk); |
| 1781 | |
| 1782 | if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) { |
| 1783 | struct l2cap_conn_rsp rsp; |
| 1784 | |
| 1785 | sk->sk_state = BT_CONFIG; |
| 1786 | |
| 1787 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 1788 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 1789 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); |
| 1790 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 1791 | l2cap_send_cmd(l2cap_pi(sk)->conn, l2cap_pi(sk)->ident, |
| 1792 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
| 1793 | |
| 1794 | release_sock(sk); |
| 1795 | return 0; |
| 1796 | } |
| 1797 | |
| 1798 | release_sock(sk); |
| 1799 | |
| 1800 | return bt_sock_recvmsg(iocb, sock, msg, len, flags); |
| 1801 | } |
| 1802 | |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 1803 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1804 | { |
| 1805 | struct sock *sk = sock->sk; |
| 1806 | struct l2cap_options opts; |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1807 | int len, err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1808 | u32 opt; |
| 1809 | |
| 1810 | BT_DBG("sk %p", sk); |
| 1811 | |
| 1812 | lock_sock(sk); |
| 1813 | |
| 1814 | switch (optname) { |
| 1815 | case L2CAP_OPTIONS: |
Marcel Holtmann | 0878b66 | 2007-05-05 00:35:59 +0200 | [diff] [blame] | 1816 | opts.imtu = l2cap_pi(sk)->imtu; |
| 1817 | opts.omtu = l2cap_pi(sk)->omtu; |
| 1818 | opts.flush_to = l2cap_pi(sk)->flush_to; |
Marcel Holtmann | c6b03cf | 2009-05-02 22:31:10 -0700 | [diff] [blame] | 1819 | opts.mode = l2cap_pi(sk)->mode; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1820 | opts.fcs = l2cap_pi(sk)->fcs; |
Gustavo F. Padovan | 68d7f0c | 2010-05-01 16:15:41 -0300 | [diff] [blame] | 1821 | opts.max_tx = l2cap_pi(sk)->max_tx; |
Gustavo F. Padovan | 14b5aa7 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 1822 | opts.txwin_size = (__u16)l2cap_pi(sk)->tx_win; |
Marcel Holtmann | 0878b66 | 2007-05-05 00:35:59 +0200 | [diff] [blame] | 1823 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1824 | len = min_t(unsigned int, sizeof(opts), optlen); |
| 1825 | if (copy_from_user((char *) &opts, optval, len)) { |
| 1826 | err = -EFAULT; |
| 1827 | break; |
| 1828 | } |
Marcel Holtmann | 0878b66 | 2007-05-05 00:35:59 +0200 | [diff] [blame] | 1829 | |
João Paulo Rechi Vita | 0041ecf | 2010-05-01 16:15:42 -0300 | [diff] [blame] | 1830 | l2cap_pi(sk)->mode = opts.mode; |
| 1831 | switch (l2cap_pi(sk)->mode) { |
| 1832 | case L2CAP_MODE_BASIC: |
| 1833 | break; |
| 1834 | case L2CAP_MODE_ERTM: |
| 1835 | case L2CAP_MODE_STREAMING: |
| 1836 | if (enable_ertm) |
| 1837 | break; |
| 1838 | /* fall through */ |
| 1839 | default: |
| 1840 | err = -EINVAL; |
| 1841 | break; |
| 1842 | } |
| 1843 | |
Marcel Holtmann | c6b03cf | 2009-05-02 22:31:10 -0700 | [diff] [blame] | 1844 | l2cap_pi(sk)->imtu = opts.imtu; |
| 1845 | l2cap_pi(sk)->omtu = opts.omtu; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1846 | l2cap_pi(sk)->fcs = opts.fcs; |
Gustavo F. Padovan | 68d7f0c | 2010-05-01 16:15:41 -0300 | [diff] [blame] | 1847 | l2cap_pi(sk)->max_tx = opts.max_tx; |
Gustavo F. Padovan | 14b5aa7 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 1848 | l2cap_pi(sk)->tx_win = (__u8)opts.txwin_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1849 | break; |
| 1850 | |
| 1851 | case L2CAP_LM: |
| 1852 | if (get_user(opt, (u32 __user *) optval)) { |
| 1853 | err = -EFAULT; |
| 1854 | break; |
| 1855 | } |
| 1856 | |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1857 | if (opt & L2CAP_LM_AUTH) |
| 1858 | l2cap_pi(sk)->sec_level = BT_SECURITY_LOW; |
| 1859 | if (opt & L2CAP_LM_ENCRYPT) |
| 1860 | l2cap_pi(sk)->sec_level = BT_SECURITY_MEDIUM; |
| 1861 | if (opt & L2CAP_LM_SECURE) |
| 1862 | l2cap_pi(sk)->sec_level = BT_SECURITY_HIGH; |
| 1863 | |
| 1864 | l2cap_pi(sk)->role_switch = (opt & L2CAP_LM_MASTER); |
| 1865 | l2cap_pi(sk)->force_reliable = (opt & L2CAP_LM_RELIABLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | break; |
| 1867 | |
| 1868 | default: |
| 1869 | err = -ENOPROTOOPT; |
| 1870 | break; |
| 1871 | } |
| 1872 | |
| 1873 | release_sock(sk); |
| 1874 | return err; |
| 1875 | } |
| 1876 | |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 1877 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 1878 | { |
| 1879 | struct sock *sk = sock->sk; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1880 | struct bt_security sec; |
| 1881 | int len, err = 0; |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 1882 | u32 opt; |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 1883 | |
| 1884 | BT_DBG("sk %p", sk); |
| 1885 | |
| 1886 | if (level == SOL_L2CAP) |
| 1887 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); |
| 1888 | |
Marcel Holtmann | 0588d94 | 2009-01-16 10:06:13 +0100 | [diff] [blame] | 1889 | if (level != SOL_BLUETOOTH) |
| 1890 | return -ENOPROTOOPT; |
| 1891 | |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 1892 | lock_sock(sk); |
| 1893 | |
| 1894 | switch (optname) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1895 | case BT_SECURITY: |
Gustavo F. Padovan | bd3c9e2 | 2010-05-01 16:15:42 -0300 | [diff] [blame] | 1896 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM |
| 1897 | && sk->sk_type != SOCK_RAW) { |
Marcel Holtmann | 0588d94 | 2009-01-16 10:06:13 +0100 | [diff] [blame] | 1898 | err = -EINVAL; |
| 1899 | break; |
| 1900 | } |
| 1901 | |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1902 | sec.level = BT_SECURITY_LOW; |
| 1903 | |
| 1904 | len = min_t(unsigned int, sizeof(sec), optlen); |
| 1905 | if (copy_from_user((char *) &sec, optval, len)) { |
| 1906 | err = -EFAULT; |
| 1907 | break; |
| 1908 | } |
| 1909 | |
| 1910 | if (sec.level < BT_SECURITY_LOW || |
| 1911 | sec.level > BT_SECURITY_HIGH) { |
| 1912 | err = -EINVAL; |
| 1913 | break; |
| 1914 | } |
| 1915 | |
| 1916 | l2cap_pi(sk)->sec_level = sec.level; |
| 1917 | break; |
| 1918 | |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 1919 | case BT_DEFER_SETUP: |
| 1920 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { |
| 1921 | err = -EINVAL; |
| 1922 | break; |
| 1923 | } |
| 1924 | |
| 1925 | if (get_user(opt, (u32 __user *) optval)) { |
| 1926 | err = -EFAULT; |
| 1927 | break; |
| 1928 | } |
| 1929 | |
| 1930 | bt_sk(sk)->defer_setup = opt; |
| 1931 | break; |
| 1932 | |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 1933 | default: |
| 1934 | err = -ENOPROTOOPT; |
| 1935 | break; |
| 1936 | } |
| 1937 | |
| 1938 | release_sock(sk); |
| 1939 | return err; |
| 1940 | } |
| 1941 | |
| 1942 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1943 | { |
| 1944 | struct sock *sk = sock->sk; |
| 1945 | struct l2cap_options opts; |
| 1946 | struct l2cap_conninfo cinfo; |
| 1947 | int len, err = 0; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1948 | u32 opt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1949 | |
| 1950 | BT_DBG("sk %p", sk); |
| 1951 | |
| 1952 | if (get_user(len, optlen)) |
| 1953 | return -EFAULT; |
| 1954 | |
| 1955 | lock_sock(sk); |
| 1956 | |
| 1957 | switch (optname) { |
| 1958 | case L2CAP_OPTIONS: |
| 1959 | opts.imtu = l2cap_pi(sk)->imtu; |
| 1960 | opts.omtu = l2cap_pi(sk)->omtu; |
| 1961 | opts.flush_to = l2cap_pi(sk)->flush_to; |
Marcel Holtmann | c6b03cf | 2009-05-02 22:31:10 -0700 | [diff] [blame] | 1962 | opts.mode = l2cap_pi(sk)->mode; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1963 | opts.fcs = l2cap_pi(sk)->fcs; |
Gustavo F. Padovan | 68d7f0c | 2010-05-01 16:15:41 -0300 | [diff] [blame] | 1964 | opts.max_tx = l2cap_pi(sk)->max_tx; |
Gustavo F. Padovan | 14b5aa7 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 1965 | opts.txwin_size = (__u16)l2cap_pi(sk)->tx_win; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1966 | |
| 1967 | len = min_t(unsigned int, len, sizeof(opts)); |
| 1968 | if (copy_to_user(optval, (char *) &opts, len)) |
| 1969 | err = -EFAULT; |
| 1970 | |
| 1971 | break; |
| 1972 | |
| 1973 | case L2CAP_LM: |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1974 | switch (l2cap_pi(sk)->sec_level) { |
| 1975 | case BT_SECURITY_LOW: |
| 1976 | opt = L2CAP_LM_AUTH; |
| 1977 | break; |
| 1978 | case BT_SECURITY_MEDIUM: |
| 1979 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; |
| 1980 | break; |
| 1981 | case BT_SECURITY_HIGH: |
| 1982 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | |
| 1983 | L2CAP_LM_SECURE; |
| 1984 | break; |
| 1985 | default: |
| 1986 | opt = 0; |
| 1987 | break; |
| 1988 | } |
| 1989 | |
| 1990 | if (l2cap_pi(sk)->role_switch) |
| 1991 | opt |= L2CAP_LM_MASTER; |
| 1992 | |
| 1993 | if (l2cap_pi(sk)->force_reliable) |
| 1994 | opt |= L2CAP_LM_RELIABLE; |
| 1995 | |
| 1996 | if (put_user(opt, (u32 __user *) optval)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1997 | err = -EFAULT; |
| 1998 | break; |
| 1999 | |
| 2000 | case L2CAP_CONNINFO: |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 2001 | if (sk->sk_state != BT_CONNECTED && |
| 2002 | !(sk->sk_state == BT_CONNECT2 && |
| 2003 | bt_sk(sk)->defer_setup)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2004 | err = -ENOTCONN; |
| 2005 | break; |
| 2006 | } |
| 2007 | |
| 2008 | cinfo.hci_handle = l2cap_pi(sk)->conn->hcon->handle; |
| 2009 | memcpy(cinfo.dev_class, l2cap_pi(sk)->conn->hcon->dev_class, 3); |
| 2010 | |
| 2011 | len = min_t(unsigned int, len, sizeof(cinfo)); |
| 2012 | if (copy_to_user(optval, (char *) &cinfo, len)) |
| 2013 | err = -EFAULT; |
| 2014 | |
| 2015 | break; |
| 2016 | |
| 2017 | default: |
| 2018 | err = -ENOPROTOOPT; |
| 2019 | break; |
| 2020 | } |
| 2021 | |
| 2022 | release_sock(sk); |
| 2023 | return err; |
| 2024 | } |
| 2025 | |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 2026 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
| 2027 | { |
| 2028 | struct sock *sk = sock->sk; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 2029 | struct bt_security sec; |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 2030 | int len, err = 0; |
| 2031 | |
| 2032 | BT_DBG("sk %p", sk); |
| 2033 | |
| 2034 | if (level == SOL_L2CAP) |
| 2035 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); |
| 2036 | |
Marcel Holtmann | 0588d94 | 2009-01-16 10:06:13 +0100 | [diff] [blame] | 2037 | if (level != SOL_BLUETOOTH) |
| 2038 | return -ENOPROTOOPT; |
| 2039 | |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 2040 | if (get_user(len, optlen)) |
| 2041 | return -EFAULT; |
| 2042 | |
| 2043 | lock_sock(sk); |
| 2044 | |
| 2045 | switch (optname) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 2046 | case BT_SECURITY: |
Gustavo F. Padovan | bd3c9e2 | 2010-05-01 16:15:42 -0300 | [diff] [blame] | 2047 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM |
| 2048 | && sk->sk_type != SOCK_RAW) { |
Marcel Holtmann | 0588d94 | 2009-01-16 10:06:13 +0100 | [diff] [blame] | 2049 | err = -EINVAL; |
| 2050 | break; |
| 2051 | } |
| 2052 | |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 2053 | sec.level = l2cap_pi(sk)->sec_level; |
| 2054 | |
| 2055 | len = min_t(unsigned int, len, sizeof(sec)); |
| 2056 | if (copy_to_user(optval, (char *) &sec, len)) |
| 2057 | err = -EFAULT; |
| 2058 | |
| 2059 | break; |
| 2060 | |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 2061 | case BT_DEFER_SETUP: |
| 2062 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { |
| 2063 | err = -EINVAL; |
| 2064 | break; |
| 2065 | } |
| 2066 | |
| 2067 | if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval)) |
| 2068 | err = -EFAULT; |
| 2069 | |
| 2070 | break; |
| 2071 | |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 2072 | default: |
| 2073 | err = -ENOPROTOOPT; |
| 2074 | break; |
| 2075 | } |
| 2076 | |
| 2077 | release_sock(sk); |
| 2078 | return err; |
| 2079 | } |
| 2080 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2081 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
| 2082 | { |
| 2083 | struct sock *sk = sock->sk; |
| 2084 | int err = 0; |
| 2085 | |
| 2086 | BT_DBG("sock %p, sk %p", sock, sk); |
| 2087 | |
| 2088 | if (!sk) |
| 2089 | return 0; |
| 2090 | |
| 2091 | lock_sock(sk); |
| 2092 | if (!sk->sk_shutdown) { |
Gustavo F. Padovan | 6161c03 | 2010-05-01 16:15:44 -0300 | [diff] [blame^] | 2093 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) |
| 2094 | err = __l2cap_wait_ack(sk); |
| 2095 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2096 | sk->sk_shutdown = SHUTDOWN_MASK; |
| 2097 | l2cap_sock_clear_timer(sk); |
| 2098 | __l2cap_sock_close(sk, 0); |
| 2099 | |
| 2100 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 2101 | err = bt_sock_wait_state(sk, BT_CLOSED, |
| 2102 | sk->sk_lingertime); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2103 | } |
| 2104 | release_sock(sk); |
| 2105 | return err; |
| 2106 | } |
| 2107 | |
| 2108 | static int l2cap_sock_release(struct socket *sock) |
| 2109 | { |
| 2110 | struct sock *sk = sock->sk; |
| 2111 | int err; |
| 2112 | |
| 2113 | BT_DBG("sock %p, sk %p", sock, sk); |
| 2114 | |
| 2115 | if (!sk) |
| 2116 | return 0; |
| 2117 | |
| 2118 | err = l2cap_sock_shutdown(sock, 2); |
| 2119 | |
| 2120 | sock_orphan(sk); |
| 2121 | l2cap_sock_kill(sk); |
| 2122 | return err; |
| 2123 | } |
| 2124 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2125 | static void l2cap_chan_ready(struct sock *sk) |
| 2126 | { |
| 2127 | struct sock *parent = bt_sk(sk)->parent; |
| 2128 | |
| 2129 | BT_DBG("sk %p, parent %p", sk, parent); |
| 2130 | |
| 2131 | l2cap_pi(sk)->conf_state = 0; |
| 2132 | l2cap_sock_clear_timer(sk); |
| 2133 | |
| 2134 | if (!parent) { |
| 2135 | /* Outgoing channel. |
| 2136 | * Wake up socket sleeping on connect. |
| 2137 | */ |
| 2138 | sk->sk_state = BT_CONNECTED; |
| 2139 | sk->sk_state_change(sk); |
| 2140 | } else { |
| 2141 | /* Incoming channel. |
| 2142 | * Wake up socket sleeping on accept. |
| 2143 | */ |
| 2144 | parent->sk_data_ready(parent, 0); |
| 2145 | } |
| 2146 | } |
| 2147 | |
| 2148 | /* Copy frame to all raw sockets on that connection */ |
| 2149 | static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) |
| 2150 | { |
| 2151 | struct l2cap_chan_list *l = &conn->chan_list; |
| 2152 | struct sk_buff *nskb; |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2153 | struct sock *sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2154 | |
| 2155 | BT_DBG("conn %p", conn); |
| 2156 | |
| 2157 | read_lock(&l->lock); |
| 2158 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
| 2159 | if (sk->sk_type != SOCK_RAW) |
| 2160 | continue; |
| 2161 | |
| 2162 | /* Don't send frame to the socket it came from */ |
| 2163 | if (skb->sk == sk) |
| 2164 | continue; |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2165 | nskb = skb_clone(skb, GFP_ATOMIC); |
| 2166 | if (!nskb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2167 | continue; |
| 2168 | |
| 2169 | if (sock_queue_rcv_skb(sk, nskb)) |
| 2170 | kfree_skb(nskb); |
| 2171 | } |
| 2172 | read_unlock(&l->lock); |
| 2173 | } |
| 2174 | |
| 2175 | /* ---- L2CAP signalling commands ---- */ |
| 2176 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, |
| 2177 | u8 code, u8 ident, u16 dlen, void *data) |
| 2178 | { |
| 2179 | struct sk_buff *skb, **frag; |
| 2180 | struct l2cap_cmd_hdr *cmd; |
| 2181 | struct l2cap_hdr *lh; |
| 2182 | int len, count; |
| 2183 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2184 | BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", |
| 2185 | conn, code, ident, dlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2186 | |
| 2187 | len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; |
| 2188 | count = min_t(unsigned int, conn->mtu, len); |
| 2189 | |
| 2190 | skb = bt_skb_alloc(count, GFP_ATOMIC); |
| 2191 | if (!skb) |
| 2192 | return NULL; |
| 2193 | |
| 2194 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2195 | lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 2196 | lh->cid = cpu_to_le16(L2CAP_CID_SIGNALING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2197 | |
| 2198 | cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); |
| 2199 | cmd->code = code; |
| 2200 | cmd->ident = ident; |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2201 | cmd->len = cpu_to_le16(dlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2202 | |
| 2203 | if (dlen) { |
| 2204 | count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; |
| 2205 | memcpy(skb_put(skb, count), data, count); |
| 2206 | data += count; |
| 2207 | } |
| 2208 | |
| 2209 | len -= skb->len; |
| 2210 | |
| 2211 | /* Continuation fragments (no L2CAP header) */ |
| 2212 | frag = &skb_shinfo(skb)->frag_list; |
| 2213 | while (len) { |
| 2214 | count = min_t(unsigned int, conn->mtu, len); |
| 2215 | |
| 2216 | *frag = bt_skb_alloc(count, GFP_ATOMIC); |
| 2217 | if (!*frag) |
| 2218 | goto fail; |
| 2219 | |
| 2220 | memcpy(skb_put(*frag, count), data, count); |
| 2221 | |
| 2222 | len -= count; |
| 2223 | data += count; |
| 2224 | |
| 2225 | frag = &(*frag)->next; |
| 2226 | } |
| 2227 | |
| 2228 | return skb; |
| 2229 | |
| 2230 | fail: |
| 2231 | kfree_skb(skb); |
| 2232 | return NULL; |
| 2233 | } |
| 2234 | |
| 2235 | static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) |
| 2236 | { |
| 2237 | struct l2cap_conf_opt *opt = *ptr; |
| 2238 | int len; |
| 2239 | |
| 2240 | len = L2CAP_CONF_OPT_SIZE + opt->len; |
| 2241 | *ptr += len; |
| 2242 | |
| 2243 | *type = opt->type; |
| 2244 | *olen = opt->len; |
| 2245 | |
| 2246 | switch (opt->len) { |
| 2247 | case 1: |
| 2248 | *val = *((u8 *) opt->val); |
| 2249 | break; |
| 2250 | |
| 2251 | case 2: |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 2252 | *val = __le16_to_cpu(*((__le16 *) opt->val)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2253 | break; |
| 2254 | |
| 2255 | case 4: |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 2256 | *val = __le32_to_cpu(*((__le32 *) opt->val)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2257 | break; |
| 2258 | |
| 2259 | default: |
| 2260 | *val = (unsigned long) opt->val; |
| 2261 | break; |
| 2262 | } |
| 2263 | |
| 2264 | BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val); |
| 2265 | return len; |
| 2266 | } |
| 2267 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2268 | static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) |
| 2269 | { |
| 2270 | struct l2cap_conf_opt *opt = *ptr; |
| 2271 | |
| 2272 | BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val); |
| 2273 | |
| 2274 | opt->type = type; |
| 2275 | opt->len = len; |
| 2276 | |
| 2277 | switch (len) { |
| 2278 | case 1: |
| 2279 | *((u8 *) opt->val) = val; |
| 2280 | break; |
| 2281 | |
| 2282 | case 2: |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 2283 | *((__le16 *) opt->val) = cpu_to_le16(val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2284 | break; |
| 2285 | |
| 2286 | case 4: |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 2287 | *((__le32 *) opt->val) = cpu_to_le32(val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2288 | break; |
| 2289 | |
| 2290 | default: |
| 2291 | memcpy(opt->val, (void *) val, len); |
| 2292 | break; |
| 2293 | } |
| 2294 | |
| 2295 | *ptr += L2CAP_CONF_OPT_SIZE + len; |
| 2296 | } |
| 2297 | |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2298 | static void l2cap_ack_timeout(unsigned long arg) |
| 2299 | { |
| 2300 | struct sock *sk = (void *) arg; |
| 2301 | |
| 2302 | bh_lock_sock(sk); |
| 2303 | l2cap_send_ack(l2cap_pi(sk)); |
| 2304 | bh_unlock_sock(sk); |
| 2305 | } |
| 2306 | |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2307 | static inline void l2cap_ertm_init(struct sock *sk) |
| 2308 | { |
| 2309 | l2cap_pi(sk)->expected_ack_seq = 0; |
| 2310 | l2cap_pi(sk)->unacked_frames = 0; |
| 2311 | l2cap_pi(sk)->buffer_seq = 0; |
Gustavo F. Padovan | 803020c | 2010-05-01 16:15:41 -0300 | [diff] [blame] | 2312 | l2cap_pi(sk)->num_acked = 0; |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 2313 | l2cap_pi(sk)->frames_sent = 0; |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2314 | |
| 2315 | setup_timer(&l2cap_pi(sk)->retrans_timer, |
| 2316 | l2cap_retrans_timeout, (unsigned long) sk); |
| 2317 | setup_timer(&l2cap_pi(sk)->monitor_timer, |
| 2318 | l2cap_monitor_timeout, (unsigned long) sk); |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2319 | setup_timer(&l2cap_pi(sk)->ack_timer, |
| 2320 | l2cap_ack_timeout, (unsigned long) sk); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2321 | |
| 2322 | __skb_queue_head_init(SREJ_QUEUE(sk)); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 2323 | __skb_queue_head_init(BUSY_QUEUE(sk)); |
| 2324 | |
| 2325 | INIT_WORK(&l2cap_pi(sk)->busy_work, l2cap_busy_work); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2326 | } |
| 2327 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2328 | static int l2cap_mode_supported(__u8 mode, __u32 feat_mask) |
| 2329 | { |
| 2330 | u32 local_feat_mask = l2cap_feat_mask; |
| 2331 | if (enable_ertm) |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 2332 | local_feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2333 | |
| 2334 | switch (mode) { |
| 2335 | case L2CAP_MODE_ERTM: |
| 2336 | return L2CAP_FEAT_ERTM & feat_mask & local_feat_mask; |
| 2337 | case L2CAP_MODE_STREAMING: |
| 2338 | return L2CAP_FEAT_STREAMING & feat_mask & local_feat_mask; |
| 2339 | default: |
| 2340 | return 0x00; |
| 2341 | } |
| 2342 | } |
| 2343 | |
| 2344 | static inline __u8 l2cap_select_mode(__u8 mode, __u16 remote_feat_mask) |
| 2345 | { |
| 2346 | switch (mode) { |
| 2347 | case L2CAP_MODE_STREAMING: |
| 2348 | case L2CAP_MODE_ERTM: |
| 2349 | if (l2cap_mode_supported(mode, remote_feat_mask)) |
| 2350 | return mode; |
| 2351 | /* fall through */ |
| 2352 | default: |
| 2353 | return L2CAP_MODE_BASIC; |
| 2354 | } |
| 2355 | } |
| 2356 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2357 | static int l2cap_build_conf_req(struct sock *sk, void *data) |
| 2358 | { |
| 2359 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 2360 | struct l2cap_conf_req *req = data; |
Gustavo F. Padovan | bd3c9e2 | 2010-05-01 16:15:42 -0300 | [diff] [blame] | 2361 | struct l2cap_conf_rfc rfc = { .mode = pi->mode }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2362 | void *ptr = req->data; |
| 2363 | |
| 2364 | BT_DBG("sk %p", sk); |
| 2365 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2366 | if (pi->num_conf_req || pi->num_conf_rsp) |
| 2367 | goto done; |
| 2368 | |
| 2369 | switch (pi->mode) { |
| 2370 | case L2CAP_MODE_STREAMING: |
| 2371 | case L2CAP_MODE_ERTM: |
| 2372 | pi->conf_state |= L2CAP_CONF_STATE2_DEVICE; |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 2373 | if (!l2cap_mode_supported(pi->mode, pi->conn->feat_mask)) |
| 2374 | l2cap_send_disconn_req(pi->conn, sk); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2375 | break; |
| 2376 | default: |
| 2377 | pi->mode = l2cap_select_mode(rfc.mode, pi->conn->feat_mask); |
| 2378 | break; |
| 2379 | } |
| 2380 | |
| 2381 | done: |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 2382 | switch (pi->mode) { |
| 2383 | case L2CAP_MODE_BASIC: |
| 2384 | if (pi->imtu != L2CAP_DEFAULT_MTU) |
| 2385 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu); |
| 2386 | break; |
| 2387 | |
| 2388 | case L2CAP_MODE_ERTM: |
| 2389 | rfc.mode = L2CAP_MODE_ERTM; |
Gustavo F. Padovan | 14b5aa7 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2390 | rfc.txwin_size = pi->tx_win; |
Gustavo F. Padovan | 68d7f0c | 2010-05-01 16:15:41 -0300 | [diff] [blame] | 2391 | rfc.max_transmit = pi->max_tx; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2392 | rfc.retrans_timeout = 0; |
| 2393 | rfc.monitor_timeout = 0; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2394 | rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE); |
Gustavo F. Padovan | d1daa09 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 2395 | if (L2CAP_DEFAULT_MAX_PDU_SIZE > pi->conn->mtu - 10) |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2396 | rfc.max_pdu_size = cpu_to_le16(pi->conn->mtu - 10); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2397 | |
| 2398 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2399 | sizeof(rfc), (unsigned long) &rfc); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2400 | |
| 2401 | if (!(pi->conn->feat_mask & L2CAP_FEAT_FCS)) |
| 2402 | break; |
| 2403 | |
| 2404 | if (pi->fcs == L2CAP_FCS_NONE || |
| 2405 | pi->conf_state & L2CAP_CONF_NO_FCS_RECV) { |
| 2406 | pi->fcs = L2CAP_FCS_NONE; |
| 2407 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, pi->fcs); |
| 2408 | } |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2409 | break; |
| 2410 | |
| 2411 | case L2CAP_MODE_STREAMING: |
| 2412 | rfc.mode = L2CAP_MODE_STREAMING; |
| 2413 | rfc.txwin_size = 0; |
| 2414 | rfc.max_transmit = 0; |
| 2415 | rfc.retrans_timeout = 0; |
| 2416 | rfc.monitor_timeout = 0; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2417 | rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE); |
Gustavo F. Padovan | d1daa09 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 2418 | if (L2CAP_DEFAULT_MAX_PDU_SIZE > pi->conn->mtu - 10) |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2419 | rfc.max_pdu_size = cpu_to_le16(pi->conn->mtu - 10); |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 2420 | |
| 2421 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2422 | sizeof(rfc), (unsigned long) &rfc); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2423 | |
| 2424 | if (!(pi->conn->feat_mask & L2CAP_FEAT_FCS)) |
| 2425 | break; |
| 2426 | |
| 2427 | if (pi->fcs == L2CAP_FCS_NONE || |
| 2428 | pi->conf_state & L2CAP_CONF_NO_FCS_RECV) { |
| 2429 | pi->fcs = L2CAP_FCS_NONE; |
| 2430 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, pi->fcs); |
| 2431 | } |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 2432 | break; |
| 2433 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2434 | |
| 2435 | /* FIXME: Need actual value of the flush timeout */ |
| 2436 | //if (flush_to != L2CAP_DEFAULT_FLUSH_TO) |
| 2437 | // l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, 2, pi->flush_to); |
| 2438 | |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2439 | req->dcid = cpu_to_le16(pi->dcid); |
| 2440 | req->flags = cpu_to_le16(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2441 | |
| 2442 | return ptr - data; |
| 2443 | } |
| 2444 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2445 | static int l2cap_parse_conf_req(struct sock *sk, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2446 | { |
| 2447 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2448 | struct l2cap_conf_rsp *rsp = data; |
| 2449 | void *ptr = rsp->data; |
| 2450 | void *req = pi->conf_req; |
| 2451 | int len = pi->conf_len; |
| 2452 | int type, hint, olen; |
| 2453 | unsigned long val; |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2454 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 2455 | u16 mtu = L2CAP_DEFAULT_MTU; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2456 | u16 result = L2CAP_CONF_SUCCESS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2457 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2458 | BT_DBG("sk %p", sk); |
Marcel Holtmann | 820ae1b | 2006-11-18 22:15:00 +0100 | [diff] [blame] | 2459 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2460 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 2461 | len -= l2cap_get_conf_opt(&req, &type, &olen, &val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2462 | |
Gustavo F. Padovan | 589d274 | 2009-04-20 01:31:07 -0300 | [diff] [blame] | 2463 | hint = type & L2CAP_CONF_HINT; |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 2464 | type &= L2CAP_CONF_MASK; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2465 | |
| 2466 | switch (type) { |
| 2467 | case L2CAP_CONF_MTU: |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 2468 | mtu = val; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2469 | break; |
| 2470 | |
| 2471 | case L2CAP_CONF_FLUSH_TO: |
| 2472 | pi->flush_to = val; |
| 2473 | break; |
| 2474 | |
| 2475 | case L2CAP_CONF_QOS: |
| 2476 | break; |
| 2477 | |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2478 | case L2CAP_CONF_RFC: |
| 2479 | if (olen == sizeof(rfc)) |
| 2480 | memcpy(&rfc, (void *) val, olen); |
| 2481 | break; |
| 2482 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2483 | case L2CAP_CONF_FCS: |
| 2484 | if (val == L2CAP_FCS_NONE) |
| 2485 | pi->conf_state |= L2CAP_CONF_NO_FCS_RECV; |
| 2486 | |
| 2487 | break; |
| 2488 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2489 | default: |
| 2490 | if (hint) |
| 2491 | break; |
| 2492 | |
| 2493 | result = L2CAP_CONF_UNKNOWN; |
| 2494 | *((u8 *) ptr++) = type; |
| 2495 | break; |
| 2496 | } |
| 2497 | } |
| 2498 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2499 | if (pi->num_conf_rsp || pi->num_conf_req) |
| 2500 | goto done; |
| 2501 | |
| 2502 | switch (pi->mode) { |
| 2503 | case L2CAP_MODE_STREAMING: |
| 2504 | case L2CAP_MODE_ERTM: |
| 2505 | pi->conf_state |= L2CAP_CONF_STATE2_DEVICE; |
| 2506 | if (!l2cap_mode_supported(pi->mode, pi->conn->feat_mask)) |
| 2507 | return -ECONNREFUSED; |
| 2508 | break; |
| 2509 | default: |
| 2510 | pi->mode = l2cap_select_mode(rfc.mode, pi->conn->feat_mask); |
| 2511 | break; |
| 2512 | } |
| 2513 | |
| 2514 | done: |
| 2515 | if (pi->mode != rfc.mode) { |
| 2516 | result = L2CAP_CONF_UNACCEPT; |
| 2517 | rfc.mode = pi->mode; |
| 2518 | |
| 2519 | if (pi->num_conf_rsp == 1) |
| 2520 | return -ECONNREFUSED; |
| 2521 | |
| 2522 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2523 | sizeof(rfc), (unsigned long) &rfc); |
| 2524 | } |
| 2525 | |
| 2526 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2527 | if (result == L2CAP_CONF_SUCCESS) { |
| 2528 | /* Configure output options and let the other side know |
| 2529 | * which ones we don't like. */ |
| 2530 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2531 | if (mtu < L2CAP_DEFAULT_MIN_MTU) |
| 2532 | result = L2CAP_CONF_UNACCEPT; |
| 2533 | else { |
| 2534 | pi->omtu = mtu; |
| 2535 | pi->conf_state |= L2CAP_CONF_MTU_DONE; |
| 2536 | } |
| 2537 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2538 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2539 | switch (rfc.mode) { |
| 2540 | case L2CAP_MODE_BASIC: |
| 2541 | pi->fcs = L2CAP_FCS_NONE; |
| 2542 | pi->conf_state |= L2CAP_CONF_MODE_DONE; |
| 2543 | break; |
| 2544 | |
| 2545 | case L2CAP_MODE_ERTM: |
| 2546 | pi->remote_tx_win = rfc.txwin_size; |
| 2547 | pi->remote_max_tx = rfc.max_transmit; |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2548 | if (rfc.max_pdu_size > pi->conn->mtu - 10) |
| 2549 | rfc.max_pdu_size = le16_to_cpu(pi->conn->mtu - 10); |
| 2550 | |
| 2551 | pi->remote_mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2552 | |
Gustavo F. Padovan | 10467e9 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2553 | rfc.retrans_timeout = |
| 2554 | le16_to_cpu(L2CAP_DEFAULT_RETRANS_TO); |
| 2555 | rfc.monitor_timeout = |
| 2556 | le16_to_cpu(L2CAP_DEFAULT_MONITOR_TO); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2557 | |
| 2558 | pi->conf_state |= L2CAP_CONF_MODE_DONE; |
Gustavo F. Padovan | 68ae663 | 2009-10-17 21:41:01 -0300 | [diff] [blame] | 2559 | |
| 2560 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2561 | sizeof(rfc), (unsigned long) &rfc); |
| 2562 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2563 | break; |
| 2564 | |
| 2565 | case L2CAP_MODE_STREAMING: |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2566 | if (rfc.max_pdu_size > pi->conn->mtu - 10) |
| 2567 | rfc.max_pdu_size = le16_to_cpu(pi->conn->mtu - 10); |
| 2568 | |
| 2569 | pi->remote_mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2570 | |
| 2571 | pi->conf_state |= L2CAP_CONF_MODE_DONE; |
Gustavo F. Padovan | 68ae663 | 2009-10-17 21:41:01 -0300 | [diff] [blame] | 2572 | |
| 2573 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2574 | sizeof(rfc), (unsigned long) &rfc); |
| 2575 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2576 | break; |
| 2577 | |
| 2578 | default: |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2579 | result = L2CAP_CONF_UNACCEPT; |
| 2580 | |
| 2581 | memset(&rfc, 0, sizeof(rfc)); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2582 | rfc.mode = pi->mode; |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2583 | } |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2584 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2585 | if (result == L2CAP_CONF_SUCCESS) |
| 2586 | pi->conf_state |= L2CAP_CONF_OUTPUT_DONE; |
| 2587 | } |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2588 | rsp->scid = cpu_to_le16(pi->dcid); |
| 2589 | rsp->result = cpu_to_le16(result); |
| 2590 | rsp->flags = cpu_to_le16(0x0000); |
| 2591 | |
| 2592 | return ptr - data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2593 | } |
| 2594 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2595 | static int l2cap_parse_conf_rsp(struct sock *sk, void *rsp, int len, void *data, u16 *result) |
| 2596 | { |
| 2597 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 2598 | struct l2cap_conf_req *req = data; |
| 2599 | void *ptr = req->data; |
| 2600 | int type, olen; |
| 2601 | unsigned long val; |
| 2602 | struct l2cap_conf_rfc rfc; |
| 2603 | |
| 2604 | BT_DBG("sk %p, rsp %p, len %d, req %p", sk, rsp, len, data); |
| 2605 | |
| 2606 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 2607 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); |
| 2608 | |
| 2609 | switch (type) { |
| 2610 | case L2CAP_CONF_MTU: |
| 2611 | if (val < L2CAP_DEFAULT_MIN_MTU) { |
| 2612 | *result = L2CAP_CONF_UNACCEPT; |
| 2613 | pi->omtu = L2CAP_DEFAULT_MIN_MTU; |
| 2614 | } else |
| 2615 | pi->omtu = val; |
| 2616 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); |
| 2617 | break; |
| 2618 | |
| 2619 | case L2CAP_CONF_FLUSH_TO: |
| 2620 | pi->flush_to = val; |
| 2621 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, |
| 2622 | 2, pi->flush_to); |
| 2623 | break; |
| 2624 | |
| 2625 | case L2CAP_CONF_RFC: |
| 2626 | if (olen == sizeof(rfc)) |
| 2627 | memcpy(&rfc, (void *)val, olen); |
| 2628 | |
| 2629 | if ((pi->conf_state & L2CAP_CONF_STATE2_DEVICE) && |
| 2630 | rfc.mode != pi->mode) |
| 2631 | return -ECONNREFUSED; |
| 2632 | |
| 2633 | pi->mode = rfc.mode; |
| 2634 | pi->fcs = 0; |
| 2635 | |
| 2636 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2637 | sizeof(rfc), (unsigned long) &rfc); |
| 2638 | break; |
| 2639 | } |
| 2640 | } |
| 2641 | |
| 2642 | if (*result == L2CAP_CONF_SUCCESS) { |
| 2643 | switch (rfc.mode) { |
| 2644 | case L2CAP_MODE_ERTM: |
| 2645 | pi->remote_tx_win = rfc.txwin_size; |
Gustavo F. Padovan | 10467e9 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2646 | pi->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); |
| 2647 | pi->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2648 | pi->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2649 | break; |
| 2650 | case L2CAP_MODE_STREAMING: |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2651 | pi->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2652 | } |
| 2653 | } |
| 2654 | |
| 2655 | req->dcid = cpu_to_le16(pi->dcid); |
| 2656 | req->flags = cpu_to_le16(0x0000); |
| 2657 | |
| 2658 | return ptr - data; |
| 2659 | } |
| 2660 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2661 | static int l2cap_build_conf_rsp(struct sock *sk, void *data, u16 result, u16 flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2662 | { |
| 2663 | struct l2cap_conf_rsp *rsp = data; |
| 2664 | void *ptr = rsp->data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2665 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2666 | BT_DBG("sk %p", sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2667 | |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2668 | rsp->scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2669 | rsp->result = cpu_to_le16(result); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2670 | rsp->flags = cpu_to_le16(flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2671 | |
| 2672 | return ptr - data; |
| 2673 | } |
| 2674 | |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2675 | static void l2cap_conf_rfc_get(struct sock *sk, void *rsp, int len) |
| 2676 | { |
| 2677 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 2678 | int type, olen; |
| 2679 | unsigned long val; |
| 2680 | struct l2cap_conf_rfc rfc; |
| 2681 | |
| 2682 | BT_DBG("sk %p, rsp %p, len %d", sk, rsp, len); |
| 2683 | |
| 2684 | if ((pi->mode != L2CAP_MODE_ERTM) && (pi->mode != L2CAP_MODE_STREAMING)) |
| 2685 | return; |
| 2686 | |
| 2687 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 2688 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); |
| 2689 | |
| 2690 | switch (type) { |
| 2691 | case L2CAP_CONF_RFC: |
| 2692 | if (olen == sizeof(rfc)) |
| 2693 | memcpy(&rfc, (void *)val, olen); |
| 2694 | goto done; |
| 2695 | } |
| 2696 | } |
| 2697 | |
| 2698 | done: |
| 2699 | switch (rfc.mode) { |
| 2700 | case L2CAP_MODE_ERTM: |
| 2701 | pi->remote_tx_win = rfc.txwin_size; |
Gustavo F. Padovan | 10467e9 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2702 | pi->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); |
| 2703 | pi->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2704 | pi->mps = le16_to_cpu(rfc.max_pdu_size); |
| 2705 | break; |
| 2706 | case L2CAP_MODE_STREAMING: |
| 2707 | pi->mps = le16_to_cpu(rfc.max_pdu_size); |
| 2708 | } |
| 2709 | } |
| 2710 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2711 | static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2712 | { |
| 2713 | struct l2cap_cmd_rej *rej = (struct l2cap_cmd_rej *) data; |
| 2714 | |
| 2715 | if (rej->reason != 0x0000) |
| 2716 | return 0; |
| 2717 | |
| 2718 | if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) && |
| 2719 | cmd->ident == conn->info_ident) { |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2720 | del_timer(&conn->info_timer); |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2721 | |
| 2722 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 2723 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2724 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2725 | l2cap_conn_start(conn); |
| 2726 | } |
| 2727 | |
| 2728 | return 0; |
| 2729 | } |
| 2730 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2731 | static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2732 | { |
| 2733 | struct l2cap_chan_list *list = &conn->chan_list; |
| 2734 | struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; |
| 2735 | struct l2cap_conn_rsp rsp; |
| 2736 | struct sock *sk, *parent; |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2737 | int result, status = L2CAP_CS_NO_INFO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2738 | |
| 2739 | u16 dcid = 0, scid = __le16_to_cpu(req->scid); |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2740 | __le16 psm = req->psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2741 | |
| 2742 | BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid); |
| 2743 | |
| 2744 | /* Check if we have socket listening on psm */ |
| 2745 | parent = l2cap_get_sock_by_psm(BT_LISTEN, psm, conn->src); |
| 2746 | if (!parent) { |
| 2747 | result = L2CAP_CR_BAD_PSM; |
| 2748 | goto sendresp; |
| 2749 | } |
| 2750 | |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2751 | /* Check if the ACL is secure enough (if not SDP) */ |
| 2752 | if (psm != cpu_to_le16(0x0001) && |
| 2753 | !hci_conn_check_link_mode(conn->hcon)) { |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 2754 | conn->disc_reason = 0x05; |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2755 | result = L2CAP_CR_SEC_BLOCK; |
| 2756 | goto response; |
| 2757 | } |
| 2758 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2759 | result = L2CAP_CR_NO_MEM; |
| 2760 | |
| 2761 | /* Check for backlog size */ |
| 2762 | if (sk_acceptq_is_full(parent)) { |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 2763 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2764 | goto response; |
| 2765 | } |
| 2766 | |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 2767 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2768 | if (!sk) |
| 2769 | goto response; |
| 2770 | |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 2771 | write_lock_bh(&list->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2772 | |
| 2773 | /* Check if we already have channel with that dcid */ |
| 2774 | if (__l2cap_get_chan_by_dcid(list, scid)) { |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 2775 | write_unlock_bh(&list->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2776 | sock_set_flag(sk, SOCK_ZAPPED); |
| 2777 | l2cap_sock_kill(sk); |
| 2778 | goto response; |
| 2779 | } |
| 2780 | |
| 2781 | hci_conn_hold(conn->hcon); |
| 2782 | |
| 2783 | l2cap_sock_init(sk, parent); |
| 2784 | bacpy(&bt_sk(sk)->src, conn->src); |
| 2785 | bacpy(&bt_sk(sk)->dst, conn->dst); |
| 2786 | l2cap_pi(sk)->psm = psm; |
| 2787 | l2cap_pi(sk)->dcid = scid; |
| 2788 | |
| 2789 | __l2cap_chan_add(conn, sk, parent); |
| 2790 | dcid = l2cap_pi(sk)->scid; |
| 2791 | |
| 2792 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); |
| 2793 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2794 | l2cap_pi(sk)->ident = cmd->ident; |
| 2795 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2796 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 2797 | if (l2cap_check_security(sk)) { |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 2798 | if (bt_sk(sk)->defer_setup) { |
| 2799 | sk->sk_state = BT_CONNECT2; |
| 2800 | result = L2CAP_CR_PEND; |
| 2801 | status = L2CAP_CS_AUTHOR_PEND; |
| 2802 | parent->sk_data_ready(parent, 0); |
| 2803 | } else { |
| 2804 | sk->sk_state = BT_CONFIG; |
| 2805 | result = L2CAP_CR_SUCCESS; |
| 2806 | status = L2CAP_CS_NO_INFO; |
| 2807 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2808 | } else { |
| 2809 | sk->sk_state = BT_CONNECT2; |
| 2810 | result = L2CAP_CR_PEND; |
| 2811 | status = L2CAP_CS_AUTHEN_PEND; |
| 2812 | } |
| 2813 | } else { |
| 2814 | sk->sk_state = BT_CONNECT2; |
| 2815 | result = L2CAP_CR_PEND; |
| 2816 | status = L2CAP_CS_NO_INFO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2817 | } |
| 2818 | |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 2819 | write_unlock_bh(&list->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2820 | |
| 2821 | response: |
| 2822 | bh_unlock_sock(parent); |
| 2823 | |
| 2824 | sendresp: |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2825 | rsp.scid = cpu_to_le16(scid); |
| 2826 | rsp.dcid = cpu_to_le16(dcid); |
| 2827 | rsp.result = cpu_to_le16(result); |
| 2828 | rsp.status = cpu_to_le16(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2829 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2830 | |
| 2831 | if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) { |
| 2832 | struct l2cap_info_req info; |
| 2833 | info.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 2834 | |
| 2835 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; |
| 2836 | conn->info_ident = l2cap_get_ident(conn); |
| 2837 | |
| 2838 | mod_timer(&conn->info_timer, jiffies + |
| 2839 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); |
| 2840 | |
| 2841 | l2cap_send_cmd(conn, conn->info_ident, |
| 2842 | L2CAP_INFO_REQ, sizeof(info), &info); |
| 2843 | } |
| 2844 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2845 | return 0; |
| 2846 | } |
| 2847 | |
| 2848 | static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2849 | { |
| 2850 | struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; |
| 2851 | u16 scid, dcid, result, status; |
| 2852 | struct sock *sk; |
| 2853 | u8 req[128]; |
| 2854 | |
| 2855 | scid = __le16_to_cpu(rsp->scid); |
| 2856 | dcid = __le16_to_cpu(rsp->dcid); |
| 2857 | result = __le16_to_cpu(rsp->result); |
| 2858 | status = __le16_to_cpu(rsp->status); |
| 2859 | |
| 2860 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid, scid, result, status); |
| 2861 | |
| 2862 | if (scid) { |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2863 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
| 2864 | if (!sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2865 | return 0; |
| 2866 | } else { |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2867 | sk = l2cap_get_chan_by_ident(&conn->chan_list, cmd->ident); |
| 2868 | if (!sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2869 | return 0; |
| 2870 | } |
| 2871 | |
| 2872 | switch (result) { |
| 2873 | case L2CAP_CR_SUCCESS: |
| 2874 | sk->sk_state = BT_CONFIG; |
| 2875 | l2cap_pi(sk)->ident = 0; |
| 2876 | l2cap_pi(sk)->dcid = dcid; |
| 2877 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; |
| 2878 | |
Marcel Holtmann | 6a8d301 | 2009-02-06 23:56:36 +0100 | [diff] [blame] | 2879 | l2cap_pi(sk)->conf_state &= ~L2CAP_CONF_CONNECT_PEND; |
| 2880 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2881 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
| 2882 | l2cap_build_conf_req(sk, req), req); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2883 | l2cap_pi(sk)->num_conf_req++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2884 | break; |
| 2885 | |
| 2886 | case L2CAP_CR_PEND: |
Marcel Holtmann | 6a8d301 | 2009-02-06 23:56:36 +0100 | [diff] [blame] | 2887 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2888 | break; |
| 2889 | |
| 2890 | default: |
| 2891 | l2cap_chan_del(sk, ECONNREFUSED); |
| 2892 | break; |
| 2893 | } |
| 2894 | |
| 2895 | bh_unlock_sock(sk); |
| 2896 | return 0; |
| 2897 | } |
| 2898 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 2899 | 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] | 2900 | { |
| 2901 | struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; |
| 2902 | u16 dcid, flags; |
| 2903 | u8 rsp[64]; |
| 2904 | struct sock *sk; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2905 | int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2906 | |
| 2907 | dcid = __le16_to_cpu(req->dcid); |
| 2908 | flags = __le16_to_cpu(req->flags); |
| 2909 | |
| 2910 | BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); |
| 2911 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2912 | sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid); |
| 2913 | if (!sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2914 | return -ENOENT; |
| 2915 | |
Marcel Holtmann | 354f60a | 2006-11-18 22:15:20 +0100 | [diff] [blame] | 2916 | if (sk->sk_state == BT_DISCONN) |
| 2917 | goto unlock; |
| 2918 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2919 | /* Reject if config buffer is too small. */ |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 2920 | len = cmd_len - sizeof(*req); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2921 | if (l2cap_pi(sk)->conf_len + len > sizeof(l2cap_pi(sk)->conf_req)) { |
| 2922 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
| 2923 | l2cap_build_conf_rsp(sk, rsp, |
| 2924 | L2CAP_CONF_REJECT, flags), rsp); |
| 2925 | goto unlock; |
| 2926 | } |
| 2927 | |
| 2928 | /* Store config. */ |
| 2929 | memcpy(l2cap_pi(sk)->conf_req + l2cap_pi(sk)->conf_len, req->data, len); |
| 2930 | l2cap_pi(sk)->conf_len += len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2931 | |
| 2932 | if (flags & 0x0001) { |
| 2933 | /* Incomplete config. Send empty response. */ |
| 2934 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2935 | l2cap_build_conf_rsp(sk, rsp, |
| 2936 | L2CAP_CONF_SUCCESS, 0x0001), rsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2937 | goto unlock; |
| 2938 | } |
| 2939 | |
| 2940 | /* Complete config. */ |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2941 | len = l2cap_parse_conf_req(sk, rsp); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2942 | if (len < 0) { |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 2943 | l2cap_send_disconn_req(conn, sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2944 | goto unlock; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2945 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2946 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2947 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2948 | l2cap_pi(sk)->num_conf_rsp++; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2949 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2950 | /* Reset config buffer. */ |
| 2951 | l2cap_pi(sk)->conf_len = 0; |
| 2952 | |
Marcel Holtmann | 876d948 | 2007-10-20 13:35:42 +0200 | [diff] [blame] | 2953 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE)) |
| 2954 | goto unlock; |
| 2955 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2956 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_INPUT_DONE) { |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 2957 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_NO_FCS_RECV) || |
| 2958 | l2cap_pi(sk)->fcs != L2CAP_FCS_NONE) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2959 | l2cap_pi(sk)->fcs = L2CAP_FCS_CRC16; |
| 2960 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2961 | sk->sk_state = BT_CONNECTED; |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2962 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 2963 | l2cap_pi(sk)->next_tx_seq = 0; |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2964 | l2cap_pi(sk)->expected_tx_seq = 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 2965 | __skb_queue_head_init(TX_QUEUE(sk)); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2966 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) |
| 2967 | l2cap_ertm_init(sk); |
| 2968 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2969 | l2cap_chan_ready(sk); |
Marcel Holtmann | 876d948 | 2007-10-20 13:35:42 +0200 | [diff] [blame] | 2970 | goto unlock; |
| 2971 | } |
| 2972 | |
| 2973 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT)) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2974 | u8 buf[64]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2975 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2976 | l2cap_build_conf_req(sk, buf), buf); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2977 | l2cap_pi(sk)->num_conf_req++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2978 | } |
| 2979 | |
| 2980 | unlock: |
| 2981 | bh_unlock_sock(sk); |
| 2982 | return 0; |
| 2983 | } |
| 2984 | |
| 2985 | static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2986 | { |
| 2987 | struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; |
| 2988 | u16 scid, flags, result; |
| 2989 | struct sock *sk; |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2990 | int len = cmd->len - sizeof(*rsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2991 | |
| 2992 | scid = __le16_to_cpu(rsp->scid); |
| 2993 | flags = __le16_to_cpu(rsp->flags); |
| 2994 | result = __le16_to_cpu(rsp->result); |
| 2995 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2996 | BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x", |
| 2997 | scid, flags, result); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2998 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2999 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
| 3000 | if (!sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3001 | return 0; |
| 3002 | |
| 3003 | switch (result) { |
| 3004 | case L2CAP_CONF_SUCCESS: |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3005 | l2cap_conf_rfc_get(sk, rsp->data, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3006 | break; |
| 3007 | |
| 3008 | case L2CAP_CONF_UNACCEPT: |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3009 | if (l2cap_pi(sk)->num_conf_rsp <= L2CAP_CONF_MAX_CONF_RSP) { |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3010 | char req[64]; |
| 3011 | |
Andrei Emeltchenko | c2c77ec | 2010-03-19 10:26:28 +0200 | [diff] [blame] | 3012 | if (len > sizeof(req) - sizeof(struct l2cap_conf_req)) { |
| 3013 | l2cap_send_disconn_req(conn, sk); |
| 3014 | goto done; |
| 3015 | } |
| 3016 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3017 | /* throw out any old stored conf requests */ |
| 3018 | result = L2CAP_CONF_SUCCESS; |
| 3019 | len = l2cap_parse_conf_rsp(sk, rsp->data, |
| 3020 | len, req, &result); |
| 3021 | if (len < 0) { |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 3022 | l2cap_send_disconn_req(conn, sk); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 3023 | goto done; |
| 3024 | } |
| 3025 | |
| 3026 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
| 3027 | L2CAP_CONF_REQ, len, req); |
| 3028 | l2cap_pi(sk)->num_conf_req++; |
| 3029 | if (result != L2CAP_CONF_SUCCESS) |
| 3030 | goto done; |
| 3031 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3032 | } |
| 3033 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 3034 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3035 | sk->sk_state = BT_DISCONN; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 3036 | sk->sk_err = ECONNRESET; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3037 | l2cap_sock_set_timer(sk, HZ * 5); |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 3038 | l2cap_send_disconn_req(conn, sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3039 | goto done; |
| 3040 | } |
| 3041 | |
| 3042 | if (flags & 0x01) |
| 3043 | goto done; |
| 3044 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3045 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_INPUT_DONE; |
| 3046 | |
| 3047 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE) { |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 3048 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_NO_FCS_RECV) || |
| 3049 | l2cap_pi(sk)->fcs != L2CAP_FCS_NONE) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3050 | l2cap_pi(sk)->fcs = L2CAP_FCS_CRC16; |
| 3051 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3052 | sk->sk_state = BT_CONNECTED; |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 3053 | l2cap_pi(sk)->next_tx_seq = 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3054 | l2cap_pi(sk)->expected_tx_seq = 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3055 | __skb_queue_head_init(TX_QUEUE(sk)); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 3056 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) |
| 3057 | l2cap_ertm_init(sk); |
| 3058 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3059 | l2cap_chan_ready(sk); |
| 3060 | } |
| 3061 | |
| 3062 | done: |
| 3063 | bh_unlock_sock(sk); |
| 3064 | return 0; |
| 3065 | } |
| 3066 | |
| 3067 | static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3068 | { |
| 3069 | struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; |
| 3070 | struct l2cap_disconn_rsp rsp; |
| 3071 | u16 dcid, scid; |
| 3072 | struct sock *sk; |
| 3073 | |
| 3074 | scid = __le16_to_cpu(req->scid); |
| 3075 | dcid = __le16_to_cpu(req->dcid); |
| 3076 | |
| 3077 | BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); |
| 3078 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 3079 | sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid); |
| 3080 | if (!sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3081 | return 0; |
| 3082 | |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 3083 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 3084 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3085 | l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); |
| 3086 | |
| 3087 | sk->sk_shutdown = SHUTDOWN_MASK; |
| 3088 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3089 | skb_queue_purge(TX_QUEUE(sk)); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 3090 | |
| 3091 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) { |
| 3092 | skb_queue_purge(SREJ_QUEUE(sk)); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3093 | skb_queue_purge(BUSY_QUEUE(sk)); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 3094 | del_timer(&l2cap_pi(sk)->retrans_timer); |
| 3095 | del_timer(&l2cap_pi(sk)->monitor_timer); |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3096 | del_timer(&l2cap_pi(sk)->ack_timer); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 3097 | } |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3098 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3099 | l2cap_chan_del(sk, ECONNRESET); |
| 3100 | bh_unlock_sock(sk); |
| 3101 | |
| 3102 | l2cap_sock_kill(sk); |
| 3103 | return 0; |
| 3104 | } |
| 3105 | |
| 3106 | static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3107 | { |
| 3108 | struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; |
| 3109 | u16 dcid, scid; |
| 3110 | struct sock *sk; |
| 3111 | |
| 3112 | scid = __le16_to_cpu(rsp->scid); |
| 3113 | dcid = __le16_to_cpu(rsp->dcid); |
| 3114 | |
| 3115 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); |
| 3116 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 3117 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
| 3118 | if (!sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3119 | return 0; |
| 3120 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3121 | skb_queue_purge(TX_QUEUE(sk)); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 3122 | |
| 3123 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) { |
| 3124 | skb_queue_purge(SREJ_QUEUE(sk)); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3125 | skb_queue_purge(BUSY_QUEUE(sk)); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 3126 | del_timer(&l2cap_pi(sk)->retrans_timer); |
| 3127 | del_timer(&l2cap_pi(sk)->monitor_timer); |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3128 | del_timer(&l2cap_pi(sk)->ack_timer); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 3129 | } |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3130 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3131 | l2cap_chan_del(sk, 0); |
| 3132 | bh_unlock_sock(sk); |
| 3133 | |
| 3134 | l2cap_sock_kill(sk); |
| 3135 | return 0; |
| 3136 | } |
| 3137 | |
| 3138 | static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3139 | { |
| 3140 | struct l2cap_info_req *req = (struct l2cap_info_req *) data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3141 | u16 type; |
| 3142 | |
| 3143 | type = __le16_to_cpu(req->type); |
| 3144 | |
| 3145 | BT_DBG("type 0x%4.4x", type); |
| 3146 | |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 3147 | if (type == L2CAP_IT_FEAT_MASK) { |
| 3148 | u8 buf[8]; |
Marcel Holtmann | 44dd46d | 2009-05-02 19:09:01 -0700 | [diff] [blame] | 3149 | u32 feat_mask = l2cap_feat_mask; |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 3150 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
| 3151 | rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 3152 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); |
Marcel Holtmann | 44dd46d | 2009-05-02 19:09:01 -0700 | [diff] [blame] | 3153 | if (enable_ertm) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3154 | feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING |
| 3155 | | L2CAP_FEAT_FCS; |
Gustavo F. Padovan | 1b7bf4e | 2009-08-24 00:45:20 -0300 | [diff] [blame] | 3156 | put_unaligned_le32(feat_mask, rsp->data); |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 3157 | l2cap_send_cmd(conn, cmd->ident, |
| 3158 | L2CAP_INFO_RSP, sizeof(buf), buf); |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 3159 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
| 3160 | u8 buf[12]; |
| 3161 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
| 3162 | rsp->type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); |
| 3163 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); |
| 3164 | memcpy(buf + 4, l2cap_fixed_chan, 8); |
| 3165 | l2cap_send_cmd(conn, cmd->ident, |
| 3166 | L2CAP_INFO_RSP, sizeof(buf), buf); |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 3167 | } else { |
| 3168 | struct l2cap_info_rsp rsp; |
| 3169 | rsp.type = cpu_to_le16(type); |
| 3170 | rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP); |
| 3171 | l2cap_send_cmd(conn, cmd->ident, |
| 3172 | L2CAP_INFO_RSP, sizeof(rsp), &rsp); |
| 3173 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3174 | |
| 3175 | return 0; |
| 3176 | } |
| 3177 | |
| 3178 | static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3179 | { |
| 3180 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; |
| 3181 | u16 type, result; |
| 3182 | |
| 3183 | type = __le16_to_cpu(rsp->type); |
| 3184 | result = __le16_to_cpu(rsp->result); |
| 3185 | |
| 3186 | BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); |
| 3187 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 3188 | del_timer(&conn->info_timer); |
| 3189 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 3190 | if (type == L2CAP_IT_FEAT_MASK) { |
Harvey Harrison | 8398531 | 2008-05-02 16:25:46 -0700 | [diff] [blame] | 3191 | conn->feat_mask = get_unaligned_le32(rsp->data); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 3192 | |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 3193 | if (conn->feat_mask & L2CAP_FEAT_FIXED_CHAN) { |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 3194 | struct l2cap_info_req req; |
| 3195 | req.type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); |
| 3196 | |
| 3197 | conn->info_ident = l2cap_get_ident(conn); |
| 3198 | |
| 3199 | l2cap_send_cmd(conn, conn->info_ident, |
| 3200 | L2CAP_INFO_REQ, sizeof(req), &req); |
| 3201 | } else { |
| 3202 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
| 3203 | conn->info_ident = 0; |
| 3204 | |
| 3205 | l2cap_conn_start(conn); |
| 3206 | } |
| 3207 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 3208 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 3209 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 3210 | |
| 3211 | l2cap_conn_start(conn); |
| 3212 | } |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 3213 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3214 | return 0; |
| 3215 | } |
| 3216 | |
| 3217 | static inline void l2cap_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb) |
| 3218 | { |
| 3219 | u8 *data = skb->data; |
| 3220 | int len = skb->len; |
| 3221 | struct l2cap_cmd_hdr cmd; |
| 3222 | int err = 0; |
| 3223 | |
| 3224 | l2cap_raw_recv(conn, skb); |
| 3225 | |
| 3226 | while (len >= L2CAP_CMD_HDR_SIZE) { |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3227 | u16 cmd_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3228 | memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); |
| 3229 | data += L2CAP_CMD_HDR_SIZE; |
| 3230 | len -= L2CAP_CMD_HDR_SIZE; |
| 3231 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3232 | cmd_len = le16_to_cpu(cmd.len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3233 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3234 | 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] | 3235 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3236 | if (cmd_len > len || !cmd.ident) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3237 | BT_DBG("corrupted command"); |
| 3238 | break; |
| 3239 | } |
| 3240 | |
| 3241 | switch (cmd.code) { |
| 3242 | case L2CAP_COMMAND_REJ: |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 3243 | l2cap_command_rej(conn, &cmd, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3244 | break; |
| 3245 | |
| 3246 | case L2CAP_CONN_REQ: |
| 3247 | err = l2cap_connect_req(conn, &cmd, data); |
| 3248 | break; |
| 3249 | |
| 3250 | case L2CAP_CONN_RSP: |
| 3251 | err = l2cap_connect_rsp(conn, &cmd, data); |
| 3252 | break; |
| 3253 | |
| 3254 | case L2CAP_CONF_REQ: |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3255 | err = l2cap_config_req(conn, &cmd, cmd_len, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3256 | break; |
| 3257 | |
| 3258 | case L2CAP_CONF_RSP: |
| 3259 | err = l2cap_config_rsp(conn, &cmd, data); |
| 3260 | break; |
| 3261 | |
| 3262 | case L2CAP_DISCONN_REQ: |
| 3263 | err = l2cap_disconnect_req(conn, &cmd, data); |
| 3264 | break; |
| 3265 | |
| 3266 | case L2CAP_DISCONN_RSP: |
| 3267 | err = l2cap_disconnect_rsp(conn, &cmd, data); |
| 3268 | break; |
| 3269 | |
| 3270 | case L2CAP_ECHO_REQ: |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3271 | l2cap_send_cmd(conn, cmd.ident, L2CAP_ECHO_RSP, cmd_len, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3272 | break; |
| 3273 | |
| 3274 | case L2CAP_ECHO_RSP: |
| 3275 | break; |
| 3276 | |
| 3277 | case L2CAP_INFO_REQ: |
| 3278 | err = l2cap_information_req(conn, &cmd, data); |
| 3279 | break; |
| 3280 | |
| 3281 | case L2CAP_INFO_RSP: |
| 3282 | err = l2cap_information_rsp(conn, &cmd, data); |
| 3283 | break; |
| 3284 | |
| 3285 | default: |
| 3286 | BT_ERR("Unknown signaling command 0x%2.2x", cmd.code); |
| 3287 | err = -EINVAL; |
| 3288 | break; |
| 3289 | } |
| 3290 | |
| 3291 | if (err) { |
| 3292 | struct l2cap_cmd_rej rej; |
| 3293 | BT_DBG("error %d", err); |
| 3294 | |
| 3295 | /* FIXME: Map err to a valid reason */ |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 3296 | rej.reason = cpu_to_le16(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3297 | l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); |
| 3298 | } |
| 3299 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3300 | data += cmd_len; |
| 3301 | len -= cmd_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3302 | } |
| 3303 | |
| 3304 | kfree_skb(skb); |
| 3305 | } |
| 3306 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3307 | static int l2cap_check_fcs(struct l2cap_pinfo *pi, struct sk_buff *skb) |
| 3308 | { |
| 3309 | u16 our_fcs, rcv_fcs; |
| 3310 | int hdr_size = L2CAP_HDR_SIZE + 2; |
| 3311 | |
| 3312 | if (pi->fcs == L2CAP_FCS_CRC16) { |
| 3313 | skb_trim(skb, skb->len - 2); |
| 3314 | rcv_fcs = get_unaligned_le16(skb->data + skb->len); |
| 3315 | our_fcs = crc16(0, skb->data - hdr_size, skb->len + hdr_size); |
| 3316 | |
| 3317 | if (our_fcs != rcv_fcs) |
| 3318 | return -EINVAL; |
| 3319 | } |
| 3320 | return 0; |
| 3321 | } |
| 3322 | |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3323 | static inline void l2cap_send_i_or_rr_or_rnr(struct sock *sk) |
| 3324 | { |
| 3325 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 3326 | u16 control = 0; |
| 3327 | |
| 3328 | pi->frames_sent = 0; |
| 3329 | pi->conn_state |= L2CAP_CONN_SEND_FBIT; |
| 3330 | |
| 3331 | control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
| 3332 | |
| 3333 | if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) { |
| 3334 | control |= L2CAP_SUPER_RCV_NOT_READY | L2CAP_CTRL_FINAL; |
| 3335 | l2cap_send_sframe(pi, control); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3336 | pi->conn_state |= L2CAP_CONN_RNR_SENT; |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3337 | pi->conn_state &= ~L2CAP_CONN_SEND_FBIT; |
| 3338 | } |
| 3339 | |
| 3340 | if (pi->conn_state & L2CAP_CONN_REMOTE_BUSY && pi->unacked_frames > 0) |
| 3341 | __mod_retrans_timer(); |
| 3342 | |
| 3343 | l2cap_ertm_send(sk); |
| 3344 | |
| 3345 | if (!(pi->conn_state & L2CAP_CONN_LOCAL_BUSY) && |
| 3346 | pi->frames_sent == 0) { |
| 3347 | control |= L2CAP_SUPER_RCV_READY; |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3348 | l2cap_send_sframe(pi, control); |
| 3349 | } |
| 3350 | } |
| 3351 | |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3352 | static int l2cap_add_to_srej_queue(struct sock *sk, struct sk_buff *skb, u8 tx_seq, u8 sar) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3353 | { |
| 3354 | struct sk_buff *next_skb; |
| 3355 | |
| 3356 | bt_cb(skb)->tx_seq = tx_seq; |
| 3357 | bt_cb(skb)->sar = sar; |
| 3358 | |
| 3359 | next_skb = skb_peek(SREJ_QUEUE(sk)); |
| 3360 | if (!next_skb) { |
| 3361 | __skb_queue_tail(SREJ_QUEUE(sk), skb); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3362 | return 0; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3363 | } |
| 3364 | |
| 3365 | do { |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3366 | if (bt_cb(next_skb)->tx_seq == tx_seq) |
| 3367 | return -EINVAL; |
| 3368 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3369 | if (bt_cb(next_skb)->tx_seq > tx_seq) { |
| 3370 | __skb_queue_before(SREJ_QUEUE(sk), next_skb, skb); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3371 | return 0; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3372 | } |
| 3373 | |
| 3374 | if (skb_queue_is_last(SREJ_QUEUE(sk), next_skb)) |
| 3375 | break; |
| 3376 | |
Gustavo F. Padovan | 59203a2 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 3377 | } while ((next_skb = skb_queue_next(SREJ_QUEUE(sk), next_skb))); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3378 | |
| 3379 | __skb_queue_tail(SREJ_QUEUE(sk), skb); |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3380 | |
| 3381 | return 0; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3382 | } |
| 3383 | |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3384 | static int l2cap_ertm_reassembly_sdu(struct sock *sk, struct sk_buff *skb, u16 control) |
| 3385 | { |
| 3386 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 3387 | struct sk_buff *_skb; |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3388 | int err; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3389 | |
| 3390 | switch (control & L2CAP_CTRL_SAR) { |
| 3391 | case L2CAP_SDU_UNSEGMENTED: |
| 3392 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) |
| 3393 | goto drop; |
| 3394 | |
| 3395 | err = sock_queue_rcv_skb(sk, skb); |
| 3396 | if (!err) |
| 3397 | return err; |
| 3398 | |
| 3399 | break; |
| 3400 | |
| 3401 | case L2CAP_SDU_START: |
| 3402 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) |
| 3403 | goto drop; |
| 3404 | |
| 3405 | pi->sdu_len = get_unaligned_le16(skb->data); |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3406 | |
| 3407 | if (pi->sdu_len > pi->imtu) |
| 3408 | goto disconnect; |
| 3409 | |
| 3410 | pi->sdu = bt_skb_alloc(pi->sdu_len, GFP_ATOMIC); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3411 | if (!pi->sdu) |
| 3412 | return -ENOMEM; |
| 3413 | |
| 3414 | /* pull sdu_len bytes only after alloc, because of Local Busy |
| 3415 | * condition we have to be sure that this will be executed |
| 3416 | * only once, i.e., when alloc does not fail */ |
| 3417 | skb_pull(skb, 2); |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3418 | |
| 3419 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); |
| 3420 | |
| 3421 | pi->conn_state |= L2CAP_CONN_SAR_SDU; |
| 3422 | pi->partial_sdu_len = skb->len; |
| 3423 | break; |
| 3424 | |
| 3425 | case L2CAP_SDU_CONTINUE: |
| 3426 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) |
| 3427 | goto disconnect; |
| 3428 | |
| 3429 | if (!pi->sdu) |
| 3430 | goto disconnect; |
| 3431 | |
| 3432 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); |
| 3433 | |
| 3434 | pi->partial_sdu_len += skb->len; |
| 3435 | if (pi->partial_sdu_len > pi->sdu_len) |
| 3436 | goto drop; |
| 3437 | |
| 3438 | break; |
| 3439 | |
| 3440 | case L2CAP_SDU_END: |
| 3441 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) |
| 3442 | goto disconnect; |
| 3443 | |
| 3444 | if (!pi->sdu) |
| 3445 | goto disconnect; |
| 3446 | |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3447 | if (!(pi->conn_state & L2CAP_CONN_SAR_RETRY)) { |
| 3448 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3449 | |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3450 | pi->partial_sdu_len += skb->len; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3451 | |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3452 | if (pi->partial_sdu_len > pi->imtu) |
| 3453 | goto drop; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3454 | |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3455 | if (pi->partial_sdu_len != pi->sdu_len) |
| 3456 | goto drop; |
| 3457 | } |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3458 | |
| 3459 | _skb = skb_clone(pi->sdu, GFP_ATOMIC); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3460 | if (!_skb) { |
| 3461 | pi->conn_state |= L2CAP_CONN_SAR_RETRY; |
| 3462 | return -ENOMEM; |
| 3463 | } |
| 3464 | |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3465 | err = sock_queue_rcv_skb(sk, _skb); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3466 | if (err < 0) { |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3467 | kfree_skb(_skb); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3468 | pi->conn_state |= L2CAP_CONN_SAR_RETRY; |
| 3469 | return err; |
| 3470 | } |
| 3471 | |
| 3472 | pi->conn_state &= ~L2CAP_CONN_SAR_RETRY; |
| 3473 | pi->conn_state &= ~L2CAP_CONN_SAR_SDU; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3474 | |
| 3475 | kfree_skb(pi->sdu); |
| 3476 | break; |
| 3477 | } |
| 3478 | |
| 3479 | kfree_skb(skb); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3480 | return 0; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3481 | |
| 3482 | drop: |
| 3483 | kfree_skb(pi->sdu); |
| 3484 | pi->sdu = NULL; |
| 3485 | |
| 3486 | disconnect: |
| 3487 | l2cap_send_disconn_req(pi->conn, sk); |
| 3488 | kfree_skb(skb); |
| 3489 | return 0; |
| 3490 | } |
| 3491 | |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3492 | static void l2cap_busy_work(struct work_struct *work) |
| 3493 | { |
| 3494 | DECLARE_WAITQUEUE(wait, current); |
| 3495 | struct l2cap_pinfo *pi = |
| 3496 | container_of(work, struct l2cap_pinfo, busy_work); |
| 3497 | struct sock *sk = (struct sock *)pi; |
| 3498 | int n_tries = 0, timeo = HZ/5, err; |
| 3499 | struct sk_buff *skb; |
| 3500 | u16 control; |
| 3501 | |
| 3502 | lock_sock(sk); |
| 3503 | |
| 3504 | add_wait_queue(sk->sk_sleep, &wait); |
| 3505 | while ((skb = skb_peek(BUSY_QUEUE(sk)))) { |
| 3506 | set_current_state(TASK_INTERRUPTIBLE); |
| 3507 | |
| 3508 | if (n_tries++ > L2CAP_LOCAL_BUSY_TRIES) { |
| 3509 | err = -EBUSY; |
| 3510 | l2cap_send_disconn_req(pi->conn, sk); |
| 3511 | goto done; |
| 3512 | } |
| 3513 | |
| 3514 | if (!timeo) |
| 3515 | timeo = HZ/5; |
| 3516 | |
| 3517 | if (signal_pending(current)) { |
| 3518 | err = sock_intr_errno(timeo); |
| 3519 | goto done; |
| 3520 | } |
| 3521 | |
| 3522 | release_sock(sk); |
| 3523 | timeo = schedule_timeout(timeo); |
| 3524 | lock_sock(sk); |
| 3525 | |
| 3526 | err = sock_error(sk); |
| 3527 | if (err) |
| 3528 | goto done; |
| 3529 | |
| 3530 | while ((skb = skb_dequeue(BUSY_QUEUE(sk)))) { |
| 3531 | control = bt_cb(skb)->sar << L2CAP_CTRL_SAR_SHIFT; |
| 3532 | err = l2cap_ertm_reassembly_sdu(sk, skb, control); |
| 3533 | if (err < 0) { |
| 3534 | skb_queue_head(BUSY_QUEUE(sk), skb); |
| 3535 | break; |
| 3536 | } |
| 3537 | |
| 3538 | pi->buffer_seq = (pi->buffer_seq + 1) % 64; |
| 3539 | } |
| 3540 | |
| 3541 | if (!skb) |
| 3542 | break; |
| 3543 | } |
| 3544 | |
| 3545 | if (!(pi->conn_state & L2CAP_CONN_RNR_SENT)) |
| 3546 | goto done; |
| 3547 | |
| 3548 | control = pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
| 3549 | control |= L2CAP_SUPER_RCV_READY | L2CAP_CTRL_POLL; |
| 3550 | l2cap_send_sframe(pi, control); |
| 3551 | l2cap_pi(sk)->retry_count = 1; |
| 3552 | |
| 3553 | del_timer(&pi->retrans_timer); |
| 3554 | __mod_monitor_timer(); |
| 3555 | |
| 3556 | l2cap_pi(sk)->conn_state |= L2CAP_CONN_WAIT_F; |
| 3557 | |
| 3558 | done: |
| 3559 | pi->conn_state &= ~L2CAP_CONN_LOCAL_BUSY; |
| 3560 | pi->conn_state &= ~L2CAP_CONN_RNR_SENT; |
| 3561 | |
| 3562 | set_current_state(TASK_RUNNING); |
| 3563 | remove_wait_queue(sk->sk_sleep, &wait); |
| 3564 | |
| 3565 | release_sock(sk); |
| 3566 | } |
| 3567 | |
| 3568 | static int l2cap_push_rx_skb(struct sock *sk, struct sk_buff *skb, u16 control) |
| 3569 | { |
| 3570 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 3571 | int sctrl, err; |
| 3572 | |
| 3573 | if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) { |
| 3574 | bt_cb(skb)->sar = control >> L2CAP_CTRL_SAR_SHIFT; |
| 3575 | __skb_queue_tail(BUSY_QUEUE(sk), skb); |
| 3576 | return -EBUSY; |
| 3577 | } |
| 3578 | |
| 3579 | err = l2cap_ertm_reassembly_sdu(sk, skb, control); |
| 3580 | if (err >= 0) { |
| 3581 | pi->buffer_seq = (pi->buffer_seq + 1) % 64; |
| 3582 | return err; |
| 3583 | } |
| 3584 | |
| 3585 | /* Busy Condition */ |
| 3586 | pi->conn_state |= L2CAP_CONN_LOCAL_BUSY; |
| 3587 | bt_cb(skb)->sar = control >> L2CAP_CTRL_SAR_SHIFT; |
| 3588 | __skb_queue_tail(BUSY_QUEUE(sk), skb); |
| 3589 | |
| 3590 | sctrl = pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
| 3591 | sctrl |= L2CAP_SUPER_RCV_NOT_READY; |
| 3592 | l2cap_send_sframe(pi, sctrl); |
| 3593 | |
| 3594 | pi->conn_state |= L2CAP_CONN_RNR_SENT; |
| 3595 | |
| 3596 | queue_work(_busy_wq, &pi->busy_work); |
| 3597 | |
| 3598 | return err; |
| 3599 | } |
| 3600 | |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3601 | static int l2cap_streaming_reassembly_sdu(struct sock *sk, struct sk_buff *skb, u16 control) |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3602 | { |
| 3603 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 3604 | struct sk_buff *_skb; |
| 3605 | int err = -EINVAL; |
| 3606 | |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3607 | /* |
| 3608 | * TODO: We have to notify the userland if some data is lost with the |
| 3609 | * Streaming Mode. |
| 3610 | */ |
| 3611 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3612 | switch (control & L2CAP_CTRL_SAR) { |
| 3613 | case L2CAP_SDU_UNSEGMENTED: |
| 3614 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) { |
| 3615 | kfree_skb(pi->sdu); |
| 3616 | break; |
| 3617 | } |
| 3618 | |
| 3619 | err = sock_queue_rcv_skb(sk, skb); |
| 3620 | if (!err) |
| 3621 | return 0; |
| 3622 | |
| 3623 | break; |
| 3624 | |
| 3625 | case L2CAP_SDU_START: |
| 3626 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) { |
| 3627 | kfree_skb(pi->sdu); |
| 3628 | break; |
| 3629 | } |
| 3630 | |
| 3631 | pi->sdu_len = get_unaligned_le16(skb->data); |
| 3632 | skb_pull(skb, 2); |
| 3633 | |
Gustavo F. Padovan | 052897c | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 3634 | if (pi->sdu_len > pi->imtu) { |
| 3635 | err = -EMSGSIZE; |
| 3636 | break; |
| 3637 | } |
| 3638 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3639 | pi->sdu = bt_skb_alloc(pi->sdu_len, GFP_ATOMIC); |
| 3640 | if (!pi->sdu) { |
| 3641 | err = -ENOMEM; |
| 3642 | break; |
| 3643 | } |
| 3644 | |
| 3645 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); |
| 3646 | |
| 3647 | pi->conn_state |= L2CAP_CONN_SAR_SDU; |
| 3648 | pi->partial_sdu_len = skb->len; |
| 3649 | err = 0; |
| 3650 | break; |
| 3651 | |
| 3652 | case L2CAP_SDU_CONTINUE: |
| 3653 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) |
| 3654 | break; |
| 3655 | |
| 3656 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); |
| 3657 | |
| 3658 | pi->partial_sdu_len += skb->len; |
| 3659 | if (pi->partial_sdu_len > pi->sdu_len) |
| 3660 | kfree_skb(pi->sdu); |
| 3661 | else |
| 3662 | err = 0; |
| 3663 | |
| 3664 | break; |
| 3665 | |
| 3666 | case L2CAP_SDU_END: |
| 3667 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) |
| 3668 | break; |
| 3669 | |
| 3670 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); |
| 3671 | |
| 3672 | pi->conn_state &= ~L2CAP_CONN_SAR_SDU; |
| 3673 | pi->partial_sdu_len += skb->len; |
| 3674 | |
Gustavo F. Padovan | 36f2fd5 | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3675 | if (pi->partial_sdu_len > pi->imtu) |
| 3676 | goto drop; |
| 3677 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3678 | if (pi->partial_sdu_len == pi->sdu_len) { |
| 3679 | _skb = skb_clone(pi->sdu, GFP_ATOMIC); |
| 3680 | err = sock_queue_rcv_skb(sk, _skb); |
| 3681 | if (err < 0) |
| 3682 | kfree_skb(_skb); |
| 3683 | } |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3684 | err = 0; |
| 3685 | |
Gustavo F. Padovan | 36f2fd5 | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3686 | drop: |
| 3687 | kfree_skb(pi->sdu); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3688 | break; |
| 3689 | } |
| 3690 | |
| 3691 | kfree_skb(skb); |
| 3692 | return err; |
| 3693 | } |
| 3694 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3695 | static void l2cap_check_srej_gap(struct sock *sk, u8 tx_seq) |
| 3696 | { |
| 3697 | struct sk_buff *skb; |
Gustavo F. Padovan | afefdbc | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 3698 | u16 control; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3699 | |
Gustavo F. Padovan | 59203a2 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 3700 | while ((skb = skb_peek(SREJ_QUEUE(sk)))) { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3701 | if (bt_cb(skb)->tx_seq != tx_seq) |
| 3702 | break; |
| 3703 | |
| 3704 | skb = skb_dequeue(SREJ_QUEUE(sk)); |
Gustavo F. Padovan | afefdbc | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 3705 | control = bt_cb(skb)->sar << L2CAP_CTRL_SAR_SHIFT; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3706 | l2cap_ertm_reassembly_sdu(sk, skb, control); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3707 | l2cap_pi(sk)->buffer_seq_srej = |
| 3708 | (l2cap_pi(sk)->buffer_seq_srej + 1) % 64; |
| 3709 | tx_seq++; |
| 3710 | } |
| 3711 | } |
| 3712 | |
| 3713 | static void l2cap_resend_srejframe(struct sock *sk, u8 tx_seq) |
| 3714 | { |
| 3715 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 3716 | struct srej_list *l, *tmp; |
| 3717 | u16 control; |
| 3718 | |
Gustavo F. Padovan | 59203a2 | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 3719 | list_for_each_entry_safe(l, tmp, SREJ_LIST(sk), list) { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3720 | if (l->tx_seq == tx_seq) { |
| 3721 | list_del(&l->list); |
| 3722 | kfree(l); |
| 3723 | return; |
| 3724 | } |
| 3725 | control = L2CAP_SUPER_SELECT_REJECT; |
| 3726 | control |= l->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
| 3727 | l2cap_send_sframe(pi, control); |
| 3728 | list_del(&l->list); |
| 3729 | list_add_tail(&l->list, SREJ_LIST(sk)); |
| 3730 | } |
| 3731 | } |
| 3732 | |
| 3733 | static void l2cap_send_srejframe(struct sock *sk, u8 tx_seq) |
| 3734 | { |
| 3735 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 3736 | struct srej_list *new; |
| 3737 | u16 control; |
| 3738 | |
| 3739 | while (tx_seq != pi->expected_tx_seq) { |
| 3740 | control = L2CAP_SUPER_SELECT_REJECT; |
| 3741 | control |= pi->expected_tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
| 3742 | l2cap_send_sframe(pi, control); |
| 3743 | |
| 3744 | new = kzalloc(sizeof(struct srej_list), GFP_ATOMIC); |
| 3745 | new->tx_seq = pi->expected_tx_seq++; |
| 3746 | list_add_tail(&new->list, SREJ_LIST(sk)); |
| 3747 | } |
| 3748 | pi->expected_tx_seq++; |
| 3749 | } |
| 3750 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3751 | static inline int l2cap_data_channel_iframe(struct sock *sk, u16 rx_control, struct sk_buff *skb) |
| 3752 | { |
| 3753 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 3754 | u8 tx_seq = __get_txseq(rx_control); |
Gustavo F. Padovan | 9f121a5 | 2009-10-03 02:34:38 -0300 | [diff] [blame] | 3755 | u8 req_seq = __get_reqseq(rx_control); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3756 | u8 sar = rx_control >> L2CAP_CTRL_SAR_SHIFT; |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3757 | u8 tx_seq_offset, expected_tx_seq_offset; |
Gustavo F. Padovan | 803020c | 2010-05-01 16:15:41 -0300 | [diff] [blame] | 3758 | int num_to_ack = (pi->tx_win/6) + 1; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3759 | int err = 0; |
| 3760 | |
| 3761 | BT_DBG("sk %p rx_control 0x%4.4x len %d", sk, rx_control, skb->len); |
| 3762 | |
Gustavo F. Padovan | 9b16dc6 | 2010-05-05 20:05:57 -0300 | [diff] [blame] | 3763 | if (L2CAP_CTRL_FINAL & rx_control && |
| 3764 | l2cap_pi(sk)->conn_state & L2CAP_CONN_WAIT_F) { |
Gustavo F. Padovan | 1d8f5d1 | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3765 | del_timer(&pi->monitor_timer); |
| 3766 | if (pi->unacked_frames > 0) |
| 3767 | __mod_retrans_timer(); |
| 3768 | pi->conn_state &= ~L2CAP_CONN_WAIT_F; |
| 3769 | } |
| 3770 | |
Gustavo F. Padovan | 9f121a5 | 2009-10-03 02:34:38 -0300 | [diff] [blame] | 3771 | pi->expected_ack_seq = req_seq; |
| 3772 | l2cap_drop_acked_frames(sk); |
| 3773 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3774 | if (tx_seq == pi->expected_tx_seq) |
| 3775 | goto expected; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3776 | |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3777 | tx_seq_offset = (tx_seq - pi->buffer_seq) % 64; |
| 3778 | if (tx_seq_offset < 0) |
| 3779 | tx_seq_offset += 64; |
| 3780 | |
| 3781 | /* invalid tx_seq */ |
| 3782 | if (tx_seq_offset >= pi->tx_win) { |
| 3783 | l2cap_send_disconn_req(pi->conn, sk); |
| 3784 | goto drop; |
| 3785 | } |
| 3786 | |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3787 | if (pi->conn_state == L2CAP_CONN_LOCAL_BUSY) |
| 3788 | goto drop; |
| 3789 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3790 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { |
| 3791 | struct srej_list *first; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3792 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3793 | first = list_first_entry(SREJ_LIST(sk), |
| 3794 | struct srej_list, list); |
| 3795 | if (tx_seq == first->tx_seq) { |
| 3796 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); |
| 3797 | l2cap_check_srej_gap(sk, tx_seq); |
| 3798 | |
| 3799 | list_del(&first->list); |
| 3800 | kfree(first); |
| 3801 | |
| 3802 | if (list_empty(SREJ_LIST(sk))) { |
| 3803 | pi->buffer_seq = pi->buffer_seq_srej; |
| 3804 | pi->conn_state &= ~L2CAP_CONN_SREJ_SENT; |
Gustavo F. Padovan | 855666cc | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 3805 | l2cap_send_ack(pi); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3806 | } |
| 3807 | } else { |
| 3808 | struct srej_list *l; |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3809 | |
| 3810 | /* duplicated tx_seq */ |
| 3811 | if (l2cap_add_to_srej_queue(sk, skb, tx_seq, sar) < 0) |
| 3812 | goto drop; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3813 | |
| 3814 | list_for_each_entry(l, SREJ_LIST(sk), list) { |
| 3815 | if (l->tx_seq == tx_seq) { |
| 3816 | l2cap_resend_srejframe(sk, tx_seq); |
| 3817 | return 0; |
| 3818 | } |
| 3819 | } |
| 3820 | l2cap_send_srejframe(sk, tx_seq); |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3821 | } |
| 3822 | } else { |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3823 | expected_tx_seq_offset = |
| 3824 | (pi->expected_tx_seq - pi->buffer_seq) % 64; |
| 3825 | if (expected_tx_seq_offset < 0) |
| 3826 | expected_tx_seq_offset += 64; |
| 3827 | |
| 3828 | /* duplicated tx_seq */ |
| 3829 | if (tx_seq_offset < expected_tx_seq_offset) |
| 3830 | goto drop; |
| 3831 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3832 | pi->conn_state |= L2CAP_CONN_SREJ_SENT; |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3833 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3834 | INIT_LIST_HEAD(SREJ_LIST(sk)); |
| 3835 | pi->buffer_seq_srej = pi->buffer_seq; |
| 3836 | |
| 3837 | __skb_queue_head_init(SREJ_QUEUE(sk)); |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3838 | __skb_queue_head_init(BUSY_QUEUE(sk)); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3839 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); |
| 3840 | |
Gustavo F. Padovan | ef54fd9 | 2009-08-20 22:26:04 -0300 | [diff] [blame] | 3841 | pi->conn_state |= L2CAP_CONN_SEND_PBIT; |
| 3842 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3843 | l2cap_send_srejframe(sk, tx_seq); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3844 | } |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3845 | return 0; |
| 3846 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3847 | expected: |
| 3848 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; |
| 3849 | |
| 3850 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { |
Gustavo F. Padovan | 3b1a9f3 | 2010-05-01 16:15:42 -0300 | [diff] [blame] | 3851 | bt_cb(skb)->tx_seq = tx_seq; |
| 3852 | bt_cb(skb)->sar = sar; |
| 3853 | __skb_queue_tail(SREJ_QUEUE(sk), skb); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3854 | return 0; |
| 3855 | } |
| 3856 | |
Gustavo F. Padovan | 4ec10d9 | 2009-10-03 02:34:39 -0300 | [diff] [blame] | 3857 | if (rx_control & L2CAP_CTRL_FINAL) { |
| 3858 | if (pi->conn_state & L2CAP_CONN_REJ_ACT) |
| 3859 | pi->conn_state &= ~L2CAP_CONN_REJ_ACT; |
| 3860 | else { |
Gustavo F. Padovan | f6e6b16 | 2010-05-01 16:15:41 -0300 | [diff] [blame] | 3861 | if (!skb_queue_empty(TX_QUEUE(sk))) |
| 3862 | sk->sk_send_head = TX_QUEUE(sk)->next; |
Gustavo F. Padovan | 4ec10d9 | 2009-10-03 02:34:39 -0300 | [diff] [blame] | 3863 | pi->next_tx_seq = pi->expected_ack_seq; |
| 3864 | l2cap_ertm_send(sk); |
| 3865 | } |
| 3866 | } |
| 3867 | |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3868 | err = l2cap_push_rx_skb(sk, skb, rx_control); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3869 | if (err < 0) |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3870 | return 0; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3871 | |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3872 | __mod_ack_timer(); |
| 3873 | |
Gustavo F. Padovan | 803020c | 2010-05-01 16:15:41 -0300 | [diff] [blame] | 3874 | pi->num_acked = (pi->num_acked + 1) % num_to_ack; |
| 3875 | if (pi->num_acked == num_to_ack - 1) |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3876 | l2cap_send_ack(pi); |
| 3877 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3878 | return 0; |
João Paulo Rechi Vita | 9b53350 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 3879 | |
| 3880 | drop: |
| 3881 | kfree_skb(skb); |
| 3882 | return 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3883 | } |
| 3884 | |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3885 | static inline void l2cap_data_channel_rrframe(struct sock *sk, u16 rx_control) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3886 | { |
| 3887 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
Gustavo F. Padovan | 6e3a598 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3888 | |
| 3889 | pi->expected_ack_seq = __get_reqseq(rx_control); |
| 3890 | l2cap_drop_acked_frames(sk); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3891 | |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3892 | if (rx_control & L2CAP_CTRL_POLL) { |
Gustavo F. Padovan | 05fbd89 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3893 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { |
| 3894 | if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY) && |
| 3895 | (pi->unacked_frames > 0)) |
| 3896 | __mod_retrans_timer(); |
| 3897 | |
| 3898 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
| 3899 | l2cap_send_srejtail(sk); |
| 3900 | } else { |
| 3901 | l2cap_send_i_or_rr_or_rnr(sk); |
| 3902 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
| 3903 | } |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3904 | |
| 3905 | } else if (rx_control & L2CAP_CTRL_FINAL) { |
| 3906 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3907 | |
| 3908 | if (pi->conn_state & L2CAP_CONN_REJ_ACT) |
| 3909 | pi->conn_state &= ~L2CAP_CONN_REJ_ACT; |
| 3910 | else { |
Gustavo F. Padovan | f6e6b16 | 2010-05-01 16:15:41 -0300 | [diff] [blame] | 3911 | if (!skb_queue_empty(TX_QUEUE(sk))) |
| 3912 | sk->sk_send_head = TX_QUEUE(sk)->next; |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3913 | pi->next_tx_seq = pi->expected_ack_seq; |
| 3914 | l2cap_ertm_send(sk); |
| 3915 | } |
| 3916 | |
| 3917 | } else { |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3918 | if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY) && |
| 3919 | (pi->unacked_frames > 0)) |
| 3920 | __mod_retrans_timer(); |
| 3921 | |
| 3922 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
| 3923 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) |
| 3924 | l2cap_send_ack(pi); |
| 3925 | else |
| 3926 | l2cap_ertm_send(sk); |
| 3927 | } |
| 3928 | } |
| 3929 | |
| 3930 | static inline void l2cap_data_channel_rejframe(struct sock *sk, u16 rx_control) |
| 3931 | { |
| 3932 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 3933 | u8 tx_seq = __get_reqseq(rx_control); |
| 3934 | |
| 3935 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
| 3936 | |
Gustavo F. Padovan | 8abb52e | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3937 | pi->expected_ack_seq = tx_seq; |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3938 | l2cap_drop_acked_frames(sk); |
| 3939 | |
| 3940 | if (rx_control & L2CAP_CTRL_FINAL) { |
| 3941 | if (pi->conn_state & L2CAP_CONN_REJ_ACT) |
| 3942 | pi->conn_state &= ~L2CAP_CONN_REJ_ACT; |
| 3943 | else { |
Gustavo F. Padovan | f6e6b16 | 2010-05-01 16:15:41 -0300 | [diff] [blame] | 3944 | if (!skb_queue_empty(TX_QUEUE(sk))) |
| 3945 | sk->sk_send_head = TX_QUEUE(sk)->next; |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3946 | pi->next_tx_seq = pi->expected_ack_seq; |
| 3947 | l2cap_ertm_send(sk); |
| 3948 | } |
| 3949 | } else { |
Gustavo F. Padovan | f6e6b16 | 2010-05-01 16:15:41 -0300 | [diff] [blame] | 3950 | if (!skb_queue_empty(TX_QUEUE(sk))) |
| 3951 | sk->sk_send_head = TX_QUEUE(sk)->next; |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3952 | pi->next_tx_seq = pi->expected_ack_seq; |
| 3953 | l2cap_ertm_send(sk); |
| 3954 | |
Gustavo F. Padovan | 0301ef0 | 2010-05-05 20:56:43 -0300 | [diff] [blame] | 3955 | if (pi->conn_state & L2CAP_CONN_WAIT_F) |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3956 | pi->conn_state |= L2CAP_CONN_REJ_ACT; |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3957 | } |
| 3958 | } |
| 3959 | static inline void l2cap_data_channel_srejframe(struct sock *sk, u16 rx_control) |
| 3960 | { |
| 3961 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 3962 | u8 tx_seq = __get_reqseq(rx_control); |
| 3963 | |
| 3964 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
| 3965 | |
| 3966 | if (rx_control & L2CAP_CTRL_POLL) { |
| 3967 | pi->expected_ack_seq = tx_seq; |
| 3968 | l2cap_drop_acked_frames(sk); |
| 3969 | l2cap_retransmit_frame(sk, tx_seq); |
| 3970 | l2cap_ertm_send(sk); |
| 3971 | if (pi->conn_state & L2CAP_CONN_WAIT_F) { |
| 3972 | pi->srej_save_reqseq = tx_seq; |
| 3973 | pi->conn_state |= L2CAP_CONN_SREJ_ACT; |
| 3974 | } |
| 3975 | } else if (rx_control & L2CAP_CTRL_FINAL) { |
| 3976 | if ((pi->conn_state & L2CAP_CONN_SREJ_ACT) && |
| 3977 | pi->srej_save_reqseq == tx_seq) |
| 3978 | pi->conn_state &= ~L2CAP_CONN_SREJ_ACT; |
| 3979 | else |
| 3980 | l2cap_retransmit_frame(sk, tx_seq); |
| 3981 | } else { |
| 3982 | l2cap_retransmit_frame(sk, tx_seq); |
| 3983 | if (pi->conn_state & L2CAP_CONN_WAIT_F) { |
| 3984 | pi->srej_save_reqseq = tx_seq; |
| 3985 | pi->conn_state |= L2CAP_CONN_SREJ_ACT; |
| 3986 | } |
| 3987 | } |
| 3988 | } |
| 3989 | |
| 3990 | static inline void l2cap_data_channel_rnrframe(struct sock *sk, u16 rx_control) |
| 3991 | { |
| 3992 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 3993 | u8 tx_seq = __get_reqseq(rx_control); |
| 3994 | |
| 3995 | pi->conn_state |= L2CAP_CONN_REMOTE_BUSY; |
| 3996 | pi->expected_ack_seq = tx_seq; |
| 3997 | l2cap_drop_acked_frames(sk); |
| 3998 | |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3999 | if (!(pi->conn_state & L2CAP_CONN_SREJ_SENT)) { |
| 4000 | del_timer(&pi->retrans_timer); |
Gustavo F. Padovan | a2e12a2 | 2010-05-05 19:58:27 -0300 | [diff] [blame] | 4001 | if (rx_control & L2CAP_CTRL_POLL) |
| 4002 | l2cap_send_rr_or_rnr(pi, L2CAP_CTRL_FINAL); |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4003 | return; |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4004 | } |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4005 | |
| 4006 | if (rx_control & L2CAP_CTRL_POLL) |
| 4007 | l2cap_send_srejtail(sk); |
| 4008 | else |
| 4009 | l2cap_send_sframe(pi, L2CAP_SUPER_RCV_READY); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4010 | } |
| 4011 | |
| 4012 | static inline int l2cap_data_channel_sframe(struct sock *sk, u16 rx_control, struct sk_buff *skb) |
| 4013 | { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4014 | BT_DBG("sk %p rx_control 0x%4.4x len %d", sk, rx_control, skb->len); |
| 4015 | |
Gustavo F. Padovan | 9b16dc6 | 2010-05-05 20:05:57 -0300 | [diff] [blame] | 4016 | if (L2CAP_CTRL_FINAL & rx_control && |
| 4017 | l2cap_pi(sk)->conn_state & L2CAP_CONN_WAIT_F) { |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4018 | del_timer(&l2cap_pi(sk)->monitor_timer); |
| 4019 | if (l2cap_pi(sk)->unacked_frames > 0) |
Gustavo F. Padovan | 1d8f5d1 | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 4020 | __mod_retrans_timer(); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4021 | l2cap_pi(sk)->conn_state &= ~L2CAP_CONN_WAIT_F; |
Gustavo F. Padovan | 1d8f5d1 | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 4022 | } |
| 4023 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4024 | switch (rx_control & L2CAP_CTRL_SUPERVISE) { |
| 4025 | case L2CAP_SUPER_RCV_READY: |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4026 | l2cap_data_channel_rrframe(sk, rx_control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4027 | break; |
| 4028 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4029 | case L2CAP_SUPER_REJECT: |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4030 | l2cap_data_channel_rejframe(sk, rx_control); |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 4031 | break; |
| 4032 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4033 | case L2CAP_SUPER_SELECT_REJECT: |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4034 | l2cap_data_channel_srejframe(sk, rx_control); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 4035 | break; |
| 4036 | |
| 4037 | case L2CAP_SUPER_RCV_NOT_READY: |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 4038 | l2cap_data_channel_rnrframe(sk, rx_control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4039 | break; |
| 4040 | } |
| 4041 | |
Gustavo F. Padovan | faaebd1 | 2010-05-01 16:15:35 -0300 | [diff] [blame] | 4042 | kfree_skb(skb); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4043 | return 0; |
| 4044 | } |
| 4045 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4046 | static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) |
| 4047 | { |
| 4048 | struct sock *sk; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 4049 | struct l2cap_pinfo *pi; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 4050 | u16 control, len; |
João Paulo Rechi Vita | 01760bd | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 4051 | u8 tx_seq, req_seq, next_tx_seq_offset, req_seq_offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4052 | |
| 4053 | sk = l2cap_get_chan_by_scid(&conn->chan_list, cid); |
| 4054 | if (!sk) { |
| 4055 | BT_DBG("unknown cid 0x%4.4x", cid); |
| 4056 | goto drop; |
| 4057 | } |
| 4058 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 4059 | pi = l2cap_pi(sk); |
| 4060 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4061 | BT_DBG("sk %p, len %d", sk, skb->len); |
| 4062 | |
| 4063 | if (sk->sk_state != BT_CONNECTED) |
| 4064 | goto drop; |
| 4065 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 4066 | switch (pi->mode) { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4067 | case L2CAP_MODE_BASIC: |
| 4068 | /* If socket recv buffers overflows we drop data here |
| 4069 | * which is *bad* because L2CAP has to be reliable. |
| 4070 | * But we don't have any other choice. L2CAP doesn't |
| 4071 | * provide flow control mechanism. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4072 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 4073 | if (pi->imtu < skb->len) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4074 | goto drop; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4075 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4076 | if (!sock_queue_rcv_skb(sk, skb)) |
| 4077 | goto done; |
| 4078 | break; |
| 4079 | |
| 4080 | case L2CAP_MODE_ERTM: |
| 4081 | control = get_unaligned_le16(skb->data); |
| 4082 | skb_pull(skb, 2); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 4083 | len = skb->len; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4084 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 4085 | if (__is_sar_start(control)) |
| 4086 | len -= 2; |
| 4087 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 4088 | if (pi->fcs == L2CAP_FCS_CRC16) |
| 4089 | len -= 2; |
| 4090 | |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 4091 | /* |
| 4092 | * We can just drop the corrupted I-frame here. |
| 4093 | * Receiver will miss it and start proper recovery |
| 4094 | * procedures and ask retransmission. |
| 4095 | */ |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4096 | if (len > pi->mps) { |
| 4097 | l2cap_send_disconn_req(pi->conn, sk); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4098 | goto drop; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4099 | } |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4100 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 4101 | if (l2cap_check_fcs(pi, skb)) |
| 4102 | goto drop; |
| 4103 | |
João Paulo Rechi Vita | 01760bd | 2010-05-01 16:15:43 -0300 | [diff] [blame] | 4104 | req_seq = __get_reqseq(control); |
| 4105 | req_seq_offset = (req_seq - pi->expected_ack_seq) % 64; |
| 4106 | if (req_seq_offset < 0) |
| 4107 | req_seq_offset += 64; |
| 4108 | |
| 4109 | next_tx_seq_offset = |
| 4110 | (pi->next_tx_seq - pi->expected_ack_seq) % 64; |
| 4111 | if (next_tx_seq_offset < 0) |
| 4112 | next_tx_seq_offset += 64; |
| 4113 | |
| 4114 | /* check for invalid req-seq */ |
| 4115 | if (req_seq_offset > next_tx_seq_offset) { |
| 4116 | l2cap_send_disconn_req(pi->conn, sk); |
| 4117 | goto drop; |
| 4118 | } |
| 4119 | |
Gustavo F. Padovan | 277ffbe | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 4120 | if (__is_iframe(control)) { |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4121 | if (len < 4) { |
| 4122 | l2cap_send_disconn_req(pi->conn, sk); |
Gustavo F. Padovan | 277ffbe | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 4123 | goto drop; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4124 | } |
Gustavo F. Padovan | 277ffbe | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 4125 | |
Andrei Emeltchenko | fcafde2 | 2009-12-22 15:58:08 +0200 | [diff] [blame] | 4126 | l2cap_data_channel_iframe(sk, control, skb); |
Gustavo F. Padovan | 277ffbe | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 4127 | } else { |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4128 | if (len != 0) { |
| 4129 | l2cap_send_disconn_req(pi->conn, sk); |
Gustavo F. Padovan | 277ffbe | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 4130 | goto drop; |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4131 | } |
Gustavo F. Padovan | 277ffbe | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 4132 | |
Andrei Emeltchenko | fcafde2 | 2009-12-22 15:58:08 +0200 | [diff] [blame] | 4133 | l2cap_data_channel_sframe(sk, control, skb); |
Gustavo F. Padovan | 277ffbe | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 4134 | } |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4135 | |
Andrei Emeltchenko | fcafde2 | 2009-12-22 15:58:08 +0200 | [diff] [blame] | 4136 | goto done; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4137 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 4138 | case L2CAP_MODE_STREAMING: |
| 4139 | control = get_unaligned_le16(skb->data); |
| 4140 | skb_pull(skb, 2); |
| 4141 | len = skb->len; |
| 4142 | |
| 4143 | if (__is_sar_start(control)) |
| 4144 | len -= 2; |
| 4145 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 4146 | if (pi->fcs == L2CAP_FCS_CRC16) |
| 4147 | len -= 2; |
| 4148 | |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 4149 | if (len > pi->mps || len < 4 || __is_sframe(control)) |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 4150 | goto drop; |
| 4151 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 4152 | if (l2cap_check_fcs(pi, skb)) |
| 4153 | goto drop; |
| 4154 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 4155 | tx_seq = __get_txseq(control); |
| 4156 | |
| 4157 | if (pi->expected_tx_seq == tx_seq) |
| 4158 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; |
| 4159 | else |
Gustavo F. Padovan | 7dffe42 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 4160 | pi->expected_tx_seq = (tx_seq + 1) % 64; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 4161 | |
Gustavo F. Padovan | 18778a6 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4162 | l2cap_streaming_reassembly_sdu(sk, skb, control); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 4163 | |
| 4164 | goto done; |
| 4165 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4166 | default: |
Gustavo F. Padovan | e8235c6 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 4167 | BT_DBG("sk %p: bad mode 0x%2.2x", sk, pi->mode); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4168 | break; |
| 4169 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4170 | |
| 4171 | drop: |
| 4172 | kfree_skb(skb); |
| 4173 | |
| 4174 | done: |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4175 | if (sk) |
| 4176 | bh_unlock_sock(sk); |
| 4177 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4178 | return 0; |
| 4179 | } |
| 4180 | |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 4181 | 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] | 4182 | { |
| 4183 | struct sock *sk; |
| 4184 | |
| 4185 | sk = l2cap_get_sock_by_psm(0, psm, conn->src); |
| 4186 | if (!sk) |
| 4187 | goto drop; |
| 4188 | |
| 4189 | BT_DBG("sk %p, len %d", sk, skb->len); |
| 4190 | |
| 4191 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECTED) |
| 4192 | goto drop; |
| 4193 | |
| 4194 | if (l2cap_pi(sk)->imtu < skb->len) |
| 4195 | goto drop; |
| 4196 | |
| 4197 | if (!sock_queue_rcv_skb(sk, skb)) |
| 4198 | goto done; |
| 4199 | |
| 4200 | drop: |
| 4201 | kfree_skb(skb); |
| 4202 | |
| 4203 | done: |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 4204 | if (sk) |
| 4205 | bh_unlock_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4206 | return 0; |
| 4207 | } |
| 4208 | |
| 4209 | static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) |
| 4210 | { |
| 4211 | struct l2cap_hdr *lh = (void *) skb->data; |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 4212 | u16 cid, len; |
| 4213 | __le16 psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4214 | |
| 4215 | skb_pull(skb, L2CAP_HDR_SIZE); |
| 4216 | cid = __le16_to_cpu(lh->cid); |
| 4217 | len = __le16_to_cpu(lh->len); |
| 4218 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 4219 | if (len != skb->len) { |
| 4220 | kfree_skb(skb); |
| 4221 | return; |
| 4222 | } |
| 4223 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4224 | BT_DBG("len %d, cid 0x%4.4x", len, cid); |
| 4225 | |
| 4226 | switch (cid) { |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 4227 | case L2CAP_CID_SIGNALING: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4228 | l2cap_sig_channel(conn, skb); |
| 4229 | break; |
| 4230 | |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 4231 | case L2CAP_CID_CONN_LESS: |
Gustavo F. Padovan | 1b7bf4e | 2009-08-24 00:45:20 -0300 | [diff] [blame] | 4232 | psm = get_unaligned_le16(skb->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4233 | skb_pull(skb, 2); |
| 4234 | l2cap_conless_channel(conn, psm, skb); |
| 4235 | break; |
| 4236 | |
| 4237 | default: |
| 4238 | l2cap_data_channel(conn, cid, skb); |
| 4239 | break; |
| 4240 | } |
| 4241 | } |
| 4242 | |
| 4243 | /* ---- L2CAP interface with lower layer (HCI) ---- */ |
| 4244 | |
| 4245 | static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) |
| 4246 | { |
| 4247 | int exact = 0, lm1 = 0, lm2 = 0; |
| 4248 | register struct sock *sk; |
| 4249 | struct hlist_node *node; |
| 4250 | |
| 4251 | if (type != ACL_LINK) |
| 4252 | return 0; |
| 4253 | |
| 4254 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); |
| 4255 | |
| 4256 | /* Find listening sockets and check their link_mode */ |
| 4257 | read_lock(&l2cap_sk_list.lock); |
| 4258 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
| 4259 | if (sk->sk_state != BT_LISTEN) |
| 4260 | continue; |
| 4261 | |
| 4262 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 4263 | lm1 |= HCI_LM_ACCEPT; |
| 4264 | if (l2cap_pi(sk)->role_switch) |
| 4265 | lm1 |= HCI_LM_MASTER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4266 | exact++; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 4267 | } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { |
| 4268 | lm2 |= HCI_LM_ACCEPT; |
| 4269 | if (l2cap_pi(sk)->role_switch) |
| 4270 | lm2 |= HCI_LM_MASTER; |
| 4271 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4272 | } |
| 4273 | read_unlock(&l2cap_sk_list.lock); |
| 4274 | |
| 4275 | return exact ? lm1 : lm2; |
| 4276 | } |
| 4277 | |
| 4278 | static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) |
| 4279 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4280 | struct l2cap_conn *conn; |
| 4281 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4282 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); |
| 4283 | |
| 4284 | if (hcon->type != ACL_LINK) |
| 4285 | return 0; |
| 4286 | |
| 4287 | if (!status) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4288 | conn = l2cap_conn_add(hcon, status); |
| 4289 | if (conn) |
| 4290 | l2cap_conn_ready(conn); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4291 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4292 | l2cap_conn_del(hcon, bt_err(status)); |
| 4293 | |
| 4294 | return 0; |
| 4295 | } |
| 4296 | |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 4297 | static int l2cap_disconn_ind(struct hci_conn *hcon) |
| 4298 | { |
| 4299 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 4300 | |
| 4301 | BT_DBG("hcon %p", hcon); |
| 4302 | |
| 4303 | if (hcon->type != ACL_LINK || !conn) |
| 4304 | return 0x13; |
| 4305 | |
| 4306 | return conn->disc_reason; |
| 4307 | } |
| 4308 | |
| 4309 | static int l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4310 | { |
| 4311 | BT_DBG("hcon %p reason %d", hcon, reason); |
| 4312 | |
| 4313 | if (hcon->type != ACL_LINK) |
| 4314 | return 0; |
| 4315 | |
| 4316 | l2cap_conn_del(hcon, bt_err(reason)); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4317 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4318 | return 0; |
| 4319 | } |
| 4320 | |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4321 | static inline void l2cap_check_encryption(struct sock *sk, u8 encrypt) |
| 4322 | { |
Gustavo F. Padovan | bd3c9e2 | 2010-05-01 16:15:42 -0300 | [diff] [blame] | 4323 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM) |
Marcel Holtmann | 255c760 | 2009-02-04 21:07:19 +0100 | [diff] [blame] | 4324 | return; |
| 4325 | |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4326 | if (encrypt == 0x00) { |
| 4327 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) { |
| 4328 | l2cap_sock_clear_timer(sk); |
| 4329 | l2cap_sock_set_timer(sk, HZ * 5); |
| 4330 | } else if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) |
| 4331 | __l2cap_sock_close(sk, ECONNREFUSED); |
| 4332 | } else { |
| 4333 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) |
| 4334 | l2cap_sock_clear_timer(sk); |
| 4335 | } |
| 4336 | } |
| 4337 | |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 4338 | 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] | 4339 | { |
| 4340 | struct l2cap_chan_list *l; |
Marcel Holtmann | 40be492 | 2008-07-14 20:13:50 +0200 | [diff] [blame] | 4341 | struct l2cap_conn *conn = hcon->l2cap_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4342 | struct sock *sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4343 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4344 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4345 | return 0; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4346 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4347 | l = &conn->chan_list; |
| 4348 | |
| 4349 | BT_DBG("conn %p", conn); |
| 4350 | |
| 4351 | read_lock(&l->lock); |
| 4352 | |
| 4353 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
| 4354 | bh_lock_sock(sk); |
| 4355 | |
Marcel Holtmann | 6a8d301 | 2009-02-06 23:56:36 +0100 | [diff] [blame] | 4356 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_CONNECT_PEND) { |
| 4357 | bh_unlock_sock(sk); |
| 4358 | continue; |
| 4359 | } |
| 4360 | |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4361 | if (!status && (sk->sk_state == BT_CONNECTED || |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 4362 | sk->sk_state == BT_CONFIG)) { |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4363 | l2cap_check_encryption(sk, encrypt); |
Marcel Holtmann | 9719f8a | 2008-07-14 20:13:45 +0200 | [diff] [blame] | 4364 | bh_unlock_sock(sk); |
| 4365 | continue; |
| 4366 | } |
| 4367 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4368 | if (sk->sk_state == BT_CONNECT) { |
| 4369 | if (!status) { |
| 4370 | struct l2cap_conn_req req; |
| 4371 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 4372 | req.psm = l2cap_pi(sk)->psm; |
| 4373 | |
| 4374 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
| 4375 | |
| 4376 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
| 4377 | L2CAP_CONN_REQ, sizeof(req), &req); |
| 4378 | } else { |
| 4379 | l2cap_sock_clear_timer(sk); |
| 4380 | l2cap_sock_set_timer(sk, HZ / 10); |
| 4381 | } |
| 4382 | } else if (sk->sk_state == BT_CONNECT2) { |
| 4383 | struct l2cap_conn_rsp rsp; |
| 4384 | __u16 result; |
| 4385 | |
| 4386 | if (!status) { |
| 4387 | sk->sk_state = BT_CONFIG; |
| 4388 | result = L2CAP_CR_SUCCESS; |
| 4389 | } else { |
| 4390 | sk->sk_state = BT_DISCONN; |
| 4391 | l2cap_sock_set_timer(sk, HZ / 10); |
| 4392 | result = L2CAP_CR_SEC_BLOCK; |
| 4393 | } |
| 4394 | |
| 4395 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 4396 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 4397 | rsp.result = cpu_to_le16(result); |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 4398 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4399 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
| 4400 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4401 | } |
| 4402 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4403 | bh_unlock_sock(sk); |
| 4404 | } |
| 4405 | |
| 4406 | read_unlock(&l->lock); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4407 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4408 | return 0; |
| 4409 | } |
| 4410 | |
| 4411 | static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) |
| 4412 | { |
| 4413 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 4414 | |
| 4415 | if (!conn && !(conn = l2cap_conn_add(hcon, 0))) |
| 4416 | goto drop; |
| 4417 | |
| 4418 | BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); |
| 4419 | |
| 4420 | if (flags & ACL_START) { |
| 4421 | struct l2cap_hdr *hdr; |
| 4422 | int len; |
| 4423 | |
| 4424 | if (conn->rx_len) { |
| 4425 | BT_ERR("Unexpected start frame (len %d)", skb->len); |
| 4426 | kfree_skb(conn->rx_skb); |
| 4427 | conn->rx_skb = NULL; |
| 4428 | conn->rx_len = 0; |
| 4429 | l2cap_conn_unreliable(conn, ECOMM); |
| 4430 | } |
| 4431 | |
| 4432 | if (skb->len < 2) { |
| 4433 | BT_ERR("Frame is too short (len %d)", skb->len); |
| 4434 | l2cap_conn_unreliable(conn, ECOMM); |
| 4435 | goto drop; |
| 4436 | } |
| 4437 | |
| 4438 | hdr = (struct l2cap_hdr *) skb->data; |
| 4439 | len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; |
| 4440 | |
| 4441 | if (len == skb->len) { |
| 4442 | /* Complete frame received */ |
| 4443 | l2cap_recv_frame(conn, skb); |
| 4444 | return 0; |
| 4445 | } |
| 4446 | |
| 4447 | BT_DBG("Start: total len %d, frag len %d", len, skb->len); |
| 4448 | |
| 4449 | if (skb->len > len) { |
| 4450 | BT_ERR("Frame is too long (len %d, expected len %d)", |
| 4451 | skb->len, len); |
| 4452 | l2cap_conn_unreliable(conn, ECOMM); |
| 4453 | goto drop; |
| 4454 | } |
| 4455 | |
| 4456 | /* Allocate skb for the complete frame (with header) */ |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 4457 | conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC); |
| 4458 | if (!conn->rx_skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4459 | goto drop; |
| 4460 | |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 4461 | 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] | 4462 | skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4463 | conn->rx_len = len - skb->len; |
| 4464 | } else { |
| 4465 | BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); |
| 4466 | |
| 4467 | if (!conn->rx_len) { |
| 4468 | BT_ERR("Unexpected continuation frame (len %d)", skb->len); |
| 4469 | l2cap_conn_unreliable(conn, ECOMM); |
| 4470 | goto drop; |
| 4471 | } |
| 4472 | |
| 4473 | if (skb->len > conn->rx_len) { |
| 4474 | BT_ERR("Fragment is too long (len %d, expected %d)", |
| 4475 | skb->len, conn->rx_len); |
| 4476 | kfree_skb(conn->rx_skb); |
| 4477 | conn->rx_skb = NULL; |
| 4478 | conn->rx_len = 0; |
| 4479 | l2cap_conn_unreliable(conn, ECOMM); |
| 4480 | goto drop; |
| 4481 | } |
| 4482 | |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 4483 | 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] | 4484 | skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4485 | conn->rx_len -= skb->len; |
| 4486 | |
| 4487 | if (!conn->rx_len) { |
| 4488 | /* Complete frame received */ |
| 4489 | l2cap_recv_frame(conn, conn->rx_skb); |
| 4490 | conn->rx_skb = NULL; |
| 4491 | } |
| 4492 | } |
| 4493 | |
| 4494 | drop: |
| 4495 | kfree_skb(skb); |
| 4496 | return 0; |
| 4497 | } |
| 4498 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4499 | static int l2cap_debugfs_show(struct seq_file *f, void *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4500 | { |
| 4501 | struct sock *sk; |
| 4502 | struct hlist_node *node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4503 | |
| 4504 | read_lock_bh(&l2cap_sk_list.lock); |
| 4505 | |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 4506 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
| 4507 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4508 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4509 | seq_printf(f, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d %d\n", |
| 4510 | batostr(&bt_sk(sk)->src), |
| 4511 | batostr(&bt_sk(sk)->dst), |
| 4512 | sk->sk_state, __le16_to_cpu(pi->psm), |
| 4513 | pi->scid, pi->dcid, |
| 4514 | pi->imtu, pi->omtu, pi->sec_level); |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 4515 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4516 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4517 | read_unlock_bh(&l2cap_sk_list.lock); |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 4518 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4519 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4520 | } |
| 4521 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4522 | static int l2cap_debugfs_open(struct inode *inode, struct file *file) |
| 4523 | { |
| 4524 | return single_open(file, l2cap_debugfs_show, inode->i_private); |
| 4525 | } |
| 4526 | |
| 4527 | static const struct file_operations l2cap_debugfs_fops = { |
| 4528 | .open = l2cap_debugfs_open, |
| 4529 | .read = seq_read, |
| 4530 | .llseek = seq_lseek, |
| 4531 | .release = single_release, |
| 4532 | }; |
| 4533 | |
| 4534 | static struct dentry *l2cap_debugfs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4535 | |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 4536 | static const struct proto_ops l2cap_sock_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4537 | .family = PF_BLUETOOTH, |
| 4538 | .owner = THIS_MODULE, |
| 4539 | .release = l2cap_sock_release, |
| 4540 | .bind = l2cap_sock_bind, |
| 4541 | .connect = l2cap_sock_connect, |
| 4542 | .listen = l2cap_sock_listen, |
| 4543 | .accept = l2cap_sock_accept, |
| 4544 | .getname = l2cap_sock_getname, |
| 4545 | .sendmsg = l2cap_sock_sendmsg, |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 4546 | .recvmsg = l2cap_sock_recvmsg, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4547 | .poll = bt_sock_poll, |
Marcel Holtmann | 3241ad8 | 2008-07-14 20:13:50 +0200 | [diff] [blame] | 4548 | .ioctl = bt_sock_ioctl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4549 | .mmap = sock_no_mmap, |
| 4550 | .socketpair = sock_no_socketpair, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4551 | .shutdown = l2cap_sock_shutdown, |
| 4552 | .setsockopt = l2cap_sock_setsockopt, |
| 4553 | .getsockopt = l2cap_sock_getsockopt |
| 4554 | }; |
| 4555 | |
Stephen Hemminger | ec1b4cf | 2009-10-05 05:58:39 +0000 | [diff] [blame] | 4556 | static const struct net_proto_family l2cap_sock_family_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4557 | .family = PF_BLUETOOTH, |
| 4558 | .owner = THIS_MODULE, |
| 4559 | .create = l2cap_sock_create, |
| 4560 | }; |
| 4561 | |
| 4562 | static struct hci_proto l2cap_hci_proto = { |
| 4563 | .name = "L2CAP", |
| 4564 | .id = HCI_PROTO_L2CAP, |
| 4565 | .connect_ind = l2cap_connect_ind, |
| 4566 | .connect_cfm = l2cap_connect_cfm, |
| 4567 | .disconn_ind = l2cap_disconn_ind, |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 4568 | .disconn_cfm = l2cap_disconn_cfm, |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 4569 | .security_cfm = l2cap_security_cfm, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4570 | .recv_acldata = l2cap_recv_acldata |
| 4571 | }; |
| 4572 | |
| 4573 | static int __init l2cap_init(void) |
| 4574 | { |
| 4575 | int err; |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 4576 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4577 | err = proto_register(&l2cap_proto, 0); |
| 4578 | if (err < 0) |
| 4579 | return err; |
| 4580 | |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4581 | _busy_wq = create_singlethread_workqueue("l2cap"); |
| 4582 | if (!_busy_wq) |
| 4583 | goto error; |
| 4584 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4585 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); |
| 4586 | if (err < 0) { |
| 4587 | BT_ERR("L2CAP socket registration failed"); |
| 4588 | goto error; |
| 4589 | } |
| 4590 | |
| 4591 | err = hci_register_proto(&l2cap_hci_proto); |
| 4592 | if (err < 0) { |
| 4593 | BT_ERR("L2CAP protocol registration failed"); |
| 4594 | bt_sock_unregister(BTPROTO_L2CAP); |
| 4595 | goto error; |
| 4596 | } |
| 4597 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4598 | if (bt_debugfs) { |
| 4599 | l2cap_debugfs = debugfs_create_file("l2cap", 0444, |
| 4600 | bt_debugfs, NULL, &l2cap_debugfs_fops); |
| 4601 | if (!l2cap_debugfs) |
| 4602 | BT_ERR("Failed to create L2CAP debug file"); |
| 4603 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4604 | |
| 4605 | BT_INFO("L2CAP ver %s", VERSION); |
| 4606 | BT_INFO("L2CAP socket layer initialized"); |
| 4607 | |
| 4608 | return 0; |
| 4609 | |
| 4610 | error: |
| 4611 | proto_unregister(&l2cap_proto); |
| 4612 | return err; |
| 4613 | } |
| 4614 | |
| 4615 | static void __exit l2cap_exit(void) |
| 4616 | { |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4617 | debugfs_remove(l2cap_debugfs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4618 | |
Gustavo F. Padovan | 1890d36 | 2010-05-01 16:15:44 -0300 | [diff] [blame] | 4619 | flush_workqueue(_busy_wq); |
| 4620 | destroy_workqueue(_busy_wq); |
| 4621 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4622 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) |
| 4623 | BT_ERR("L2CAP socket unregistration failed"); |
| 4624 | |
| 4625 | if (hci_unregister_proto(&l2cap_hci_proto) < 0) |
| 4626 | BT_ERR("L2CAP protocol unregistration failed"); |
| 4627 | |
| 4628 | proto_unregister(&l2cap_proto); |
| 4629 | } |
| 4630 | |
| 4631 | void l2cap_load(void) |
| 4632 | { |
| 4633 | /* Dummy function to trigger automatic L2CAP module loading by |
| 4634 | * other modules that use L2CAP sockets but don't use any other |
| 4635 | * symbols from it. */ |
| 4636 | return; |
| 4637 | } |
| 4638 | EXPORT_SYMBOL(l2cap_load); |
| 4639 | |
| 4640 | module_init(l2cap_init); |
| 4641 | module_exit(l2cap_exit); |
| 4642 | |
Marcel Holtmann | 44dd46d | 2009-05-02 19:09:01 -0700 | [diff] [blame] | 4643 | module_param(enable_ertm, bool, 0644); |
| 4644 | MODULE_PARM_DESC(enable_ertm, "Enable enhanced retransmission mode"); |
| 4645 | |
Marcel Holtmann | 5fbcd3d | 2009-10-05 11:35:43 +0200 | [diff] [blame] | 4646 | module_param(max_transmit, uint, 0644); |
| 4647 | MODULE_PARM_DESC(max_transmit, "Max transmit value (default = 3)"); |
| 4648 | |
Gustavo F. Padovan | 369ba30 | 2010-05-01 16:15:41 -0300 | [diff] [blame] | 4649 | module_param(tx_window, uint, 0644); |
| 4650 | MODULE_PARM_DESC(tx_window, "Transmission window size value (default = 63)"); |
| 4651 | |
Marcel Holtmann | 63fbd24 | 2008-08-18 13:23:53 +0200 | [diff] [blame] | 4652 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4653 | MODULE_DESCRIPTION("Bluetooth L2CAP ver " VERSION); |
| 4654 | MODULE_VERSION(VERSION); |
| 4655 | MODULE_LICENSE("GPL"); |
| 4656 | MODULE_ALIAS("bt-proto-0"); |