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 | |
| 58 | static int enable_ertm = 0; |
Marcel Holtmann | 5fbcd3d | 2009-10-05 11:35:43 +0200 | [diff] [blame] | 59 | static int max_transmit = L2CAP_DEFAULT_MAX_TX; |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 60 | |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 61 | static u32 l2cap_feat_mask = L2CAP_FEAT_FIXED_CHAN; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 62 | static u8 l2cap_fixed_chan[8] = { 0x02, }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 64 | static const struct proto_ops l2cap_sock_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | |
| 66 | static struct bt_sock_list l2cap_sk_list = { |
Robert P. J. Day | d5fb296 | 2008-03-28 16:17:38 -0700 | [diff] [blame] | 67 | .lock = __RW_LOCK_UNLOCKED(l2cap_sk_list.lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | }; |
| 69 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | static void __l2cap_sock_close(struct sock *sk, int reason); |
| 71 | static void l2cap_sock_close(struct sock *sk); |
| 72 | static void l2cap_sock_kill(struct sock *sk); |
| 73 | |
| 74 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, |
| 75 | u8 code, u8 ident, u16 dlen, void *data); |
| 76 | |
| 77 | /* ---- L2CAP timers ---- */ |
| 78 | static void l2cap_sock_timeout(unsigned long arg) |
| 79 | { |
| 80 | struct sock *sk = (struct sock *) arg; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 81 | int reason; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | |
| 83 | BT_DBG("sock %p state %d", sk, sk->sk_state); |
| 84 | |
| 85 | bh_lock_sock(sk); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 86 | |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 87 | if (sk->sk_state == BT_CONNECTED || sk->sk_state == BT_CONFIG) |
| 88 | reason = ECONNREFUSED; |
| 89 | else if (sk->sk_state == BT_CONNECT && |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 90 | l2cap_pi(sk)->sec_level != BT_SECURITY_SDP) |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 91 | reason = ECONNREFUSED; |
| 92 | else |
| 93 | reason = ETIMEDOUT; |
| 94 | |
| 95 | __l2cap_sock_close(sk, reason); |
| 96 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | bh_unlock_sock(sk); |
| 98 | |
| 99 | l2cap_sock_kill(sk); |
| 100 | sock_put(sk); |
| 101 | } |
| 102 | |
| 103 | static void l2cap_sock_set_timer(struct sock *sk, long timeout) |
| 104 | { |
| 105 | BT_DBG("sk %p state %d timeout %ld", sk, sk->sk_state, timeout); |
| 106 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); |
| 107 | } |
| 108 | |
| 109 | static void l2cap_sock_clear_timer(struct sock *sk) |
| 110 | { |
| 111 | BT_DBG("sock %p state %d", sk, sk->sk_state); |
| 112 | sk_stop_timer(sk, &sk->sk_timer); |
| 113 | } |
| 114 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 115 | /* ---- L2CAP channels ---- */ |
| 116 | static struct sock *__l2cap_get_chan_by_dcid(struct l2cap_chan_list *l, u16 cid) |
| 117 | { |
| 118 | struct sock *s; |
| 119 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { |
| 120 | if (l2cap_pi(s)->dcid == cid) |
| 121 | break; |
| 122 | } |
| 123 | return s; |
| 124 | } |
| 125 | |
| 126 | static struct sock *__l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) |
| 127 | { |
| 128 | struct sock *s; |
| 129 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { |
| 130 | if (l2cap_pi(s)->scid == cid) |
| 131 | break; |
| 132 | } |
| 133 | return s; |
| 134 | } |
| 135 | |
| 136 | /* Find channel with given SCID. |
| 137 | * Returns locked socket */ |
| 138 | static inline struct sock *l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) |
| 139 | { |
| 140 | struct sock *s; |
| 141 | read_lock(&l->lock); |
| 142 | s = __l2cap_get_chan_by_scid(l, cid); |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 143 | if (s) |
| 144 | bh_lock_sock(s); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 145 | read_unlock(&l->lock); |
| 146 | return s; |
| 147 | } |
| 148 | |
| 149 | static struct sock *__l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) |
| 150 | { |
| 151 | struct sock *s; |
| 152 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { |
| 153 | if (l2cap_pi(s)->ident == ident) |
| 154 | break; |
| 155 | } |
| 156 | return s; |
| 157 | } |
| 158 | |
| 159 | static inline struct sock *l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) |
| 160 | { |
| 161 | struct sock *s; |
| 162 | read_lock(&l->lock); |
| 163 | s = __l2cap_get_chan_by_ident(l, ident); |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 164 | if (s) |
| 165 | bh_lock_sock(s); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 166 | read_unlock(&l->lock); |
| 167 | return s; |
| 168 | } |
| 169 | |
| 170 | static u16 l2cap_alloc_cid(struct l2cap_chan_list *l) |
| 171 | { |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 172 | u16 cid = L2CAP_CID_DYN_START; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 173 | |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 174 | for (; cid < L2CAP_CID_DYN_END; cid++) { |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 175 | if (!__l2cap_get_chan_by_scid(l, cid)) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 176 | return cid; |
| 177 | } |
| 178 | |
| 179 | return 0; |
| 180 | } |
| 181 | |
| 182 | static inline void __l2cap_chan_link(struct l2cap_chan_list *l, struct sock *sk) |
| 183 | { |
| 184 | sock_hold(sk); |
| 185 | |
| 186 | if (l->head) |
| 187 | l2cap_pi(l->head)->prev_c = sk; |
| 188 | |
| 189 | l2cap_pi(sk)->next_c = l->head; |
| 190 | l2cap_pi(sk)->prev_c = NULL; |
| 191 | l->head = sk; |
| 192 | } |
| 193 | |
| 194 | static inline void l2cap_chan_unlink(struct l2cap_chan_list *l, struct sock *sk) |
| 195 | { |
| 196 | struct sock *next = l2cap_pi(sk)->next_c, *prev = l2cap_pi(sk)->prev_c; |
| 197 | |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 198 | write_lock_bh(&l->lock); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 199 | if (sk == l->head) |
| 200 | l->head = next; |
| 201 | |
| 202 | if (next) |
| 203 | l2cap_pi(next)->prev_c = prev; |
| 204 | if (prev) |
| 205 | l2cap_pi(prev)->next_c = next; |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 206 | write_unlock_bh(&l->lock); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 207 | |
| 208 | __sock_put(sk); |
| 209 | } |
| 210 | |
| 211 | static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) |
| 212 | { |
| 213 | struct l2cap_chan_list *l = &conn->chan_list; |
| 214 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 215 | BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, |
| 216 | l2cap_pi(sk)->psm, l2cap_pi(sk)->dcid); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 217 | |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 218 | conn->disc_reason = 0x13; |
| 219 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 220 | l2cap_pi(sk)->conn = conn; |
| 221 | |
| 222 | if (sk->sk_type == SOCK_SEQPACKET) { |
| 223 | /* Alloc CID for connection-oriented socket */ |
| 224 | l2cap_pi(sk)->scid = l2cap_alloc_cid(l); |
| 225 | } else if (sk->sk_type == SOCK_DGRAM) { |
| 226 | /* Connectionless socket */ |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 227 | l2cap_pi(sk)->scid = L2CAP_CID_CONN_LESS; |
| 228 | l2cap_pi(sk)->dcid = L2CAP_CID_CONN_LESS; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 229 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; |
| 230 | } else { |
| 231 | /* Raw socket can send/recv signalling messages only */ |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 232 | l2cap_pi(sk)->scid = L2CAP_CID_SIGNALING; |
| 233 | l2cap_pi(sk)->dcid = L2CAP_CID_SIGNALING; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 234 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; |
| 235 | } |
| 236 | |
| 237 | __l2cap_chan_link(l, sk); |
| 238 | |
| 239 | if (parent) |
| 240 | bt_accept_enqueue(parent, sk); |
| 241 | } |
| 242 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 243 | /* Delete channel. |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 244 | * Must be called on the locked socket. */ |
| 245 | static void l2cap_chan_del(struct sock *sk, int err) |
| 246 | { |
| 247 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 248 | struct sock *parent = bt_sk(sk)->parent; |
| 249 | |
| 250 | l2cap_sock_clear_timer(sk); |
| 251 | |
| 252 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); |
| 253 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 254 | if (conn) { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 255 | /* Unlink from channel list */ |
| 256 | l2cap_chan_unlink(&conn->chan_list, sk); |
| 257 | l2cap_pi(sk)->conn = NULL; |
| 258 | hci_conn_put(conn->hcon); |
| 259 | } |
| 260 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 261 | sk->sk_state = BT_CLOSED; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 262 | sock_set_flag(sk, SOCK_ZAPPED); |
| 263 | |
| 264 | if (err) |
| 265 | sk->sk_err = err; |
| 266 | |
| 267 | if (parent) { |
| 268 | bt_accept_unlink(sk); |
| 269 | parent->sk_data_ready(parent, 0); |
| 270 | } else |
| 271 | sk->sk_state_change(sk); |
| 272 | } |
| 273 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 274 | /* Service level security */ |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 275 | static inline int l2cap_check_security(struct sock *sk) |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 276 | { |
| 277 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
Marcel Holtmann | 0684e5f | 2009-02-09 02:48:38 +0100 | [diff] [blame] | 278 | __u8 auth_type; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 279 | |
Marcel Holtmann | 00ae4af | 2009-02-12 16:19:45 +0100 | [diff] [blame] | 280 | if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
| 281 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) |
| 282 | auth_type = HCI_AT_NO_BONDING_MITM; |
| 283 | else |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 284 | auth_type = HCI_AT_NO_BONDING; |
Marcel Holtmann | 00ae4af | 2009-02-12 16:19:45 +0100 | [diff] [blame] | 285 | |
| 286 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) |
| 287 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; |
| 288 | } else { |
| 289 | switch (l2cap_pi(sk)->sec_level) { |
| 290 | case BT_SECURITY_HIGH: |
| 291 | auth_type = HCI_AT_GENERAL_BONDING_MITM; |
| 292 | break; |
| 293 | case BT_SECURITY_MEDIUM: |
| 294 | auth_type = HCI_AT_GENERAL_BONDING; |
| 295 | break; |
| 296 | default: |
| 297 | auth_type = HCI_AT_NO_BONDING; |
| 298 | break; |
| 299 | } |
Marcel Holtmann | 0684e5f | 2009-02-09 02:48:38 +0100 | [diff] [blame] | 300 | } |
| 301 | |
| 302 | return hci_conn_security(conn->hcon, l2cap_pi(sk)->sec_level, |
| 303 | auth_type); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 304 | } |
| 305 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 306 | static inline u8 l2cap_get_ident(struct l2cap_conn *conn) |
| 307 | { |
| 308 | u8 id; |
| 309 | |
| 310 | /* Get next available identificator. |
| 311 | * 1 - 128 are used by kernel. |
| 312 | * 129 - 199 are reserved. |
| 313 | * 200 - 254 are used by utilities like l2ping, etc. |
| 314 | */ |
| 315 | |
| 316 | spin_lock_bh(&conn->lock); |
| 317 | |
| 318 | if (++conn->tx_ident > 128) |
| 319 | conn->tx_ident = 1; |
| 320 | |
| 321 | id = conn->tx_ident; |
| 322 | |
| 323 | spin_unlock_bh(&conn->lock); |
| 324 | |
| 325 | return id; |
| 326 | } |
| 327 | |
| 328 | static inline int l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, void *data) |
| 329 | { |
| 330 | struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); |
| 331 | |
| 332 | BT_DBG("code 0x%2.2x", code); |
| 333 | |
| 334 | if (!skb) |
| 335 | return -ENOMEM; |
| 336 | |
| 337 | return hci_send_acl(conn->hcon, skb, 0); |
| 338 | } |
| 339 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 340 | static inline int l2cap_send_sframe(struct l2cap_pinfo *pi, u16 control) |
| 341 | { |
| 342 | struct sk_buff *skb; |
| 343 | struct l2cap_hdr *lh; |
| 344 | struct l2cap_conn *conn = pi->conn; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 345 | int count, hlen = L2CAP_HDR_SIZE + 2; |
| 346 | |
| 347 | if (pi->fcs == L2CAP_FCS_CRC16) |
| 348 | hlen += 2; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 349 | |
| 350 | BT_DBG("pi %p, control 0x%2.2x", pi, control); |
| 351 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 352 | count = min_t(unsigned int, conn->mtu, hlen); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 353 | control |= L2CAP_CTRL_FRAME_TYPE; |
| 354 | |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 355 | if (pi->conn_state & L2CAP_CONN_SEND_FBIT) { |
| 356 | control |= L2CAP_CTRL_FINAL; |
| 357 | pi->conn_state &= ~L2CAP_CONN_SEND_FBIT; |
| 358 | } |
| 359 | |
Gustavo F. Padovan | f0946cc | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 360 | if (pi->conn_state & L2CAP_CONN_SEND_PBIT) { |
| 361 | control |= L2CAP_CTRL_POLL; |
| 362 | pi->conn_state &= ~L2CAP_CONN_SEND_PBIT; |
| 363 | } |
| 364 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 365 | skb = bt_skb_alloc(count, GFP_ATOMIC); |
| 366 | if (!skb) |
| 367 | return -ENOMEM; |
| 368 | |
| 369 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 370 | lh->len = cpu_to_le16(hlen - L2CAP_HDR_SIZE); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 371 | lh->cid = cpu_to_le16(pi->dcid); |
| 372 | put_unaligned_le16(control, skb_put(skb, 2)); |
| 373 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 374 | if (pi->fcs == L2CAP_FCS_CRC16) { |
| 375 | u16 fcs = crc16(0, (u8 *)lh, count - 2); |
| 376 | put_unaligned_le16(fcs, skb_put(skb, 2)); |
| 377 | } |
| 378 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 379 | return hci_send_acl(pi->conn->hcon, skb, 0); |
| 380 | } |
| 381 | |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 382 | static inline int l2cap_send_rr_or_rnr(struct l2cap_pinfo *pi, u16 control) |
| 383 | { |
| 384 | if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) |
| 385 | control |= L2CAP_SUPER_RCV_NOT_READY; |
| 386 | else |
| 387 | control |= L2CAP_SUPER_RCV_READY; |
| 388 | |
Gustavo F. Padovan | 2ab25cd | 2009-10-03 02:34:40 -0300 | [diff] [blame] | 389 | control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
| 390 | |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 391 | return l2cap_send_sframe(pi, control); |
| 392 | } |
| 393 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 394 | static void l2cap_do_start(struct sock *sk) |
| 395 | { |
| 396 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 397 | |
| 398 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) { |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 399 | if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)) |
| 400 | return; |
| 401 | |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 402 | if (l2cap_check_security(sk)) { |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 403 | struct l2cap_conn_req req; |
| 404 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 405 | req.psm = l2cap_pi(sk)->psm; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 406 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 407 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 408 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 409 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 410 | L2CAP_CONN_REQ, sizeof(req), &req); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 411 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 412 | } else { |
| 413 | struct l2cap_info_req req; |
| 414 | req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 415 | |
| 416 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; |
| 417 | conn->info_ident = l2cap_get_ident(conn); |
| 418 | |
| 419 | mod_timer(&conn->info_timer, jiffies + |
| 420 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); |
| 421 | |
| 422 | l2cap_send_cmd(conn, conn->info_ident, |
| 423 | L2CAP_INFO_REQ, sizeof(req), &req); |
| 424 | } |
| 425 | } |
| 426 | |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 427 | static void l2cap_send_disconn_req(struct l2cap_conn *conn, struct sock *sk) |
| 428 | { |
| 429 | struct l2cap_disconn_req req; |
| 430 | |
| 431 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 432 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 433 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
| 434 | L2CAP_DISCONN_REQ, sizeof(req), &req); |
| 435 | } |
| 436 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | /* ---- L2CAP connections ---- */ |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 438 | static void l2cap_conn_start(struct l2cap_conn *conn) |
| 439 | { |
| 440 | struct l2cap_chan_list *l = &conn->chan_list; |
| 441 | struct sock *sk; |
| 442 | |
| 443 | BT_DBG("conn %p", conn); |
| 444 | |
| 445 | read_lock(&l->lock); |
| 446 | |
| 447 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
| 448 | bh_lock_sock(sk); |
| 449 | |
| 450 | if (sk->sk_type != SOCK_SEQPACKET) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 451 | bh_unlock_sock(sk); |
| 452 | continue; |
| 453 | } |
| 454 | |
| 455 | if (sk->sk_state == BT_CONNECT) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 456 | if (l2cap_check_security(sk)) { |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 457 | struct l2cap_conn_req req; |
| 458 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 459 | req.psm = l2cap_pi(sk)->psm; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 460 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 461 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 462 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 463 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 464 | L2CAP_CONN_REQ, sizeof(req), &req); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 465 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 466 | } else if (sk->sk_state == BT_CONNECT2) { |
| 467 | struct l2cap_conn_rsp rsp; |
| 468 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 469 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 470 | |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 471 | if (l2cap_check_security(sk)) { |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 472 | if (bt_sk(sk)->defer_setup) { |
| 473 | struct sock *parent = bt_sk(sk)->parent; |
| 474 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); |
| 475 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHOR_PEND); |
| 476 | parent->sk_data_ready(parent, 0); |
| 477 | |
| 478 | } else { |
| 479 | sk->sk_state = BT_CONFIG; |
| 480 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); |
| 481 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 482 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 483 | } else { |
| 484 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); |
| 485 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHEN_PEND); |
| 486 | } |
| 487 | |
| 488 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
| 489 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
| 490 | } |
| 491 | |
| 492 | bh_unlock_sock(sk); |
| 493 | } |
| 494 | |
| 495 | read_unlock(&l->lock); |
| 496 | } |
| 497 | |
| 498 | static void l2cap_conn_ready(struct l2cap_conn *conn) |
| 499 | { |
| 500 | struct l2cap_chan_list *l = &conn->chan_list; |
| 501 | struct sock *sk; |
| 502 | |
| 503 | BT_DBG("conn %p", conn); |
| 504 | |
| 505 | read_lock(&l->lock); |
| 506 | |
| 507 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
| 508 | bh_lock_sock(sk); |
| 509 | |
| 510 | if (sk->sk_type != SOCK_SEQPACKET) { |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 511 | l2cap_sock_clear_timer(sk); |
| 512 | sk->sk_state = BT_CONNECTED; |
| 513 | sk->sk_state_change(sk); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 514 | } else if (sk->sk_state == BT_CONNECT) |
| 515 | l2cap_do_start(sk); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 516 | |
| 517 | bh_unlock_sock(sk); |
| 518 | } |
| 519 | |
| 520 | read_unlock(&l->lock); |
| 521 | } |
| 522 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 523 | /* Notify sockets that we cannot guaranty reliability anymore */ |
| 524 | static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) |
| 525 | { |
| 526 | struct l2cap_chan_list *l = &conn->chan_list; |
| 527 | struct sock *sk; |
| 528 | |
| 529 | BT_DBG("conn %p", conn); |
| 530 | |
| 531 | read_lock(&l->lock); |
| 532 | |
| 533 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 534 | if (l2cap_pi(sk)->force_reliable) |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 535 | sk->sk_err = err; |
| 536 | } |
| 537 | |
| 538 | read_unlock(&l->lock); |
| 539 | } |
| 540 | |
| 541 | static void l2cap_info_timeout(unsigned long arg) |
| 542 | { |
| 543 | struct l2cap_conn *conn = (void *) arg; |
| 544 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 545 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 546 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 547 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 548 | l2cap_conn_start(conn); |
| 549 | } |
| 550 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) |
| 552 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 553 | struct l2cap_conn *conn = hcon->l2cap_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 555 | if (conn || status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | return conn; |
| 557 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 558 | conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC); |
| 559 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | |
| 562 | hcon->l2cap_data = conn; |
| 563 | conn->hcon = hcon; |
| 564 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 565 | BT_DBG("hcon %p conn %p", hcon, conn); |
| 566 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | conn->mtu = hcon->hdev->acl_mtu; |
| 568 | conn->src = &hcon->hdev->bdaddr; |
| 569 | conn->dst = &hcon->dst; |
| 570 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 571 | conn->feat_mask = 0; |
| 572 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | spin_lock_init(&conn->lock); |
| 574 | rwlock_init(&conn->chan_list.lock); |
| 575 | |
Dave Young | 45054dc | 2009-10-18 20:28:30 +0000 | [diff] [blame] | 576 | setup_timer(&conn->info_timer, l2cap_info_timeout, |
| 577 | (unsigned long) conn); |
| 578 | |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 579 | conn->disc_reason = 0x13; |
| 580 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | return conn; |
| 582 | } |
| 583 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 584 | static void l2cap_conn_del(struct hci_conn *hcon, int err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 586 | struct l2cap_conn *conn = hcon->l2cap_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | struct sock *sk; |
| 588 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 589 | if (!conn) |
| 590 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | |
| 592 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); |
| 593 | |
Wei Yongjun | 7585b97 | 2009-02-25 18:29:52 +0800 | [diff] [blame] | 594 | kfree_skb(conn->rx_skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | |
| 596 | /* Kill channels */ |
| 597 | while ((sk = conn->chan_list.head)) { |
| 598 | bh_lock_sock(sk); |
| 599 | l2cap_chan_del(sk, err); |
| 600 | bh_unlock_sock(sk); |
| 601 | l2cap_sock_kill(sk); |
| 602 | } |
| 603 | |
Dave Young | 8e8440f | 2008-03-03 12:18:55 -0800 | [diff] [blame] | 604 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) |
| 605 | del_timer_sync(&conn->info_timer); |
Thomas Gleixner | 3ab2273 | 2008-02-26 17:42:56 -0800 | [diff] [blame] | 606 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | hcon->l2cap_data = NULL; |
| 608 | kfree(conn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | } |
| 610 | |
| 611 | static inline void l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) |
| 612 | { |
| 613 | struct l2cap_chan_list *l = &conn->chan_list; |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 614 | write_lock_bh(&l->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | __l2cap_chan_add(conn, sk, parent); |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 616 | write_unlock_bh(&l->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | } |
| 618 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | /* ---- Socket interface ---- */ |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 620 | 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] | 621 | { |
| 622 | struct sock *sk; |
| 623 | struct hlist_node *node; |
| 624 | sk_for_each(sk, node, &l2cap_sk_list.head) |
| 625 | if (l2cap_pi(sk)->sport == psm && !bacmp(&bt_sk(sk)->src, src)) |
| 626 | goto found; |
| 627 | sk = NULL; |
| 628 | found: |
| 629 | return sk; |
| 630 | } |
| 631 | |
| 632 | /* Find socket with psm and source bdaddr. |
| 633 | * Returns closest match. |
| 634 | */ |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 635 | 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] | 636 | { |
| 637 | struct sock *sk = NULL, *sk1 = NULL; |
| 638 | struct hlist_node *node; |
| 639 | |
| 640 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
| 641 | if (state && sk->sk_state != state) |
| 642 | continue; |
| 643 | |
| 644 | if (l2cap_pi(sk)->psm == psm) { |
| 645 | /* Exact match. */ |
| 646 | if (!bacmp(&bt_sk(sk)->src, src)) |
| 647 | break; |
| 648 | |
| 649 | /* Closest match */ |
| 650 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) |
| 651 | sk1 = sk; |
| 652 | } |
| 653 | } |
| 654 | return node ? sk : sk1; |
| 655 | } |
| 656 | |
| 657 | /* Find socket with given address (psm, src). |
| 658 | * Returns locked socket */ |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 659 | 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] | 660 | { |
| 661 | struct sock *s; |
| 662 | read_lock(&l2cap_sk_list.lock); |
| 663 | s = __l2cap_get_sock_by_psm(state, psm, src); |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 664 | if (s) |
| 665 | bh_lock_sock(s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | read_unlock(&l2cap_sk_list.lock); |
| 667 | return s; |
| 668 | } |
| 669 | |
| 670 | static void l2cap_sock_destruct(struct sock *sk) |
| 671 | { |
| 672 | BT_DBG("sk %p", sk); |
| 673 | |
| 674 | skb_queue_purge(&sk->sk_receive_queue); |
| 675 | skb_queue_purge(&sk->sk_write_queue); |
| 676 | } |
| 677 | |
| 678 | static void l2cap_sock_cleanup_listen(struct sock *parent) |
| 679 | { |
| 680 | struct sock *sk; |
| 681 | |
| 682 | BT_DBG("parent %p", parent); |
| 683 | |
| 684 | /* Close not yet accepted channels */ |
| 685 | while ((sk = bt_accept_dequeue(parent, NULL))) |
| 686 | l2cap_sock_close(sk); |
| 687 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 688 | parent->sk_state = BT_CLOSED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | sock_set_flag(parent, SOCK_ZAPPED); |
| 690 | } |
| 691 | |
| 692 | /* Kill socket (only if zapped and orphan) |
| 693 | * Must be called on unlocked socket. |
| 694 | */ |
| 695 | static void l2cap_sock_kill(struct sock *sk) |
| 696 | { |
| 697 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) |
| 698 | return; |
| 699 | |
| 700 | BT_DBG("sk %p state %d", sk, sk->sk_state); |
| 701 | |
| 702 | /* Kill poor orphan */ |
| 703 | bt_sock_unlink(&l2cap_sk_list, sk); |
| 704 | sock_set_flag(sk, SOCK_DEAD); |
| 705 | sock_put(sk); |
| 706 | } |
| 707 | |
| 708 | static void __l2cap_sock_close(struct sock *sk, int reason) |
| 709 | { |
| 710 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); |
| 711 | |
| 712 | switch (sk->sk_state) { |
| 713 | case BT_LISTEN: |
| 714 | l2cap_sock_cleanup_listen(sk); |
| 715 | break; |
| 716 | |
| 717 | case BT_CONNECTED: |
| 718 | case BT_CONFIG: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | if (sk->sk_type == SOCK_SEQPACKET) { |
| 720 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | |
| 722 | sk->sk_state = BT_DISCONN; |
| 723 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 724 | l2cap_send_disconn_req(conn, sk); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 725 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | l2cap_chan_del(sk, reason); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | break; |
| 728 | |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 729 | case BT_CONNECT2: |
| 730 | if (sk->sk_type == SOCK_SEQPACKET) { |
| 731 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 732 | struct l2cap_conn_rsp rsp; |
| 733 | __u16 result; |
| 734 | |
| 735 | if (bt_sk(sk)->defer_setup) |
| 736 | result = L2CAP_CR_SEC_BLOCK; |
| 737 | else |
| 738 | result = L2CAP_CR_BAD_PSM; |
| 739 | |
| 740 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 741 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 742 | rsp.result = cpu_to_le16(result); |
| 743 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 744 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
| 745 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
| 746 | } else |
| 747 | l2cap_chan_del(sk, reason); |
| 748 | break; |
| 749 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | case BT_CONNECT: |
| 751 | case BT_DISCONN: |
| 752 | l2cap_chan_del(sk, reason); |
| 753 | break; |
| 754 | |
| 755 | default: |
| 756 | sock_set_flag(sk, SOCK_ZAPPED); |
| 757 | break; |
| 758 | } |
| 759 | } |
| 760 | |
| 761 | /* Must be called on unlocked socket. */ |
| 762 | static void l2cap_sock_close(struct sock *sk) |
| 763 | { |
| 764 | l2cap_sock_clear_timer(sk); |
| 765 | lock_sock(sk); |
| 766 | __l2cap_sock_close(sk, ECONNRESET); |
| 767 | release_sock(sk); |
| 768 | l2cap_sock_kill(sk); |
| 769 | } |
| 770 | |
| 771 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) |
| 772 | { |
| 773 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 774 | |
| 775 | BT_DBG("sk %p", sk); |
| 776 | |
| 777 | if (parent) { |
| 778 | sk->sk_type = parent->sk_type; |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 779 | bt_sk(sk)->defer_setup = bt_sk(parent)->defer_setup; |
| 780 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | pi->imtu = l2cap_pi(parent)->imtu; |
| 782 | pi->omtu = l2cap_pi(parent)->omtu; |
Marcel Holtmann | c6b03cf | 2009-05-02 22:31:10 -0700 | [diff] [blame] | 783 | pi->mode = l2cap_pi(parent)->mode; |
| 784 | pi->fcs = l2cap_pi(parent)->fcs; |
Gustavo F. Padovan | 14b5aa7 | 2010-05-01 16:15:40 -0300 | [diff] [blame^] | 785 | pi->tx_win = l2cap_pi(parent)->tx_win; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 786 | pi->sec_level = l2cap_pi(parent)->sec_level; |
| 787 | pi->role_switch = l2cap_pi(parent)->role_switch; |
| 788 | pi->force_reliable = l2cap_pi(parent)->force_reliable; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | } else { |
| 790 | pi->imtu = L2CAP_DEFAULT_MTU; |
| 791 | pi->omtu = 0; |
Marcel Holtmann | c6b03cf | 2009-05-02 22:31:10 -0700 | [diff] [blame] | 792 | pi->mode = L2CAP_MODE_BASIC; |
| 793 | pi->fcs = L2CAP_FCS_CRC16; |
Gustavo F. Padovan | 14b5aa7 | 2010-05-01 16:15:40 -0300 | [diff] [blame^] | 794 | pi->tx_win = L2CAP_DEFAULT_TX_WINDOW; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 795 | pi->sec_level = BT_SECURITY_LOW; |
| 796 | pi->role_switch = 0; |
| 797 | pi->force_reliable = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | } |
| 799 | |
| 800 | /* Default config options */ |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 801 | pi->conf_len = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | pi->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
Dave Young | 45054dc | 2009-10-18 20:28:30 +0000 | [diff] [blame] | 803 | skb_queue_head_init(TX_QUEUE(sk)); |
| 804 | skb_queue_head_init(SREJ_QUEUE(sk)); |
| 805 | INIT_LIST_HEAD(SREJ_LIST(sk)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | } |
| 807 | |
| 808 | static struct proto l2cap_proto = { |
| 809 | .name = "L2CAP", |
| 810 | .owner = THIS_MODULE, |
| 811 | .obj_size = sizeof(struct l2cap_pinfo) |
| 812 | }; |
| 813 | |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 814 | 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] | 815 | { |
| 816 | struct sock *sk; |
| 817 | |
Pavel Emelyanov | 6257ff2 | 2007-11-01 00:39:31 -0700 | [diff] [blame] | 818 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | if (!sk) |
| 820 | return NULL; |
| 821 | |
| 822 | sock_init_data(sock, sk); |
| 823 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); |
| 824 | |
| 825 | sk->sk_destruct = l2cap_sock_destruct; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 826 | sk->sk_sndtimeo = msecs_to_jiffies(L2CAP_CONN_TIMEOUT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | |
| 828 | sock_reset_flag(sk, SOCK_ZAPPED); |
| 829 | |
| 830 | sk->sk_protocol = proto; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 831 | sk->sk_state = BT_OPEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 833 | setup_timer(&sk->sk_timer, l2cap_sock_timeout, (unsigned long) sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | |
| 835 | bt_sock_link(&l2cap_sk_list, sk); |
| 836 | return sk; |
| 837 | } |
| 838 | |
Eric Paris | 3f378b6 | 2009-11-05 22:18:14 -0800 | [diff] [blame] | 839 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, |
| 840 | int kern) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | { |
| 842 | struct sock *sk; |
| 843 | |
| 844 | BT_DBG("sock %p", sock); |
| 845 | |
| 846 | sock->state = SS_UNCONNECTED; |
| 847 | |
| 848 | if (sock->type != SOCK_SEQPACKET && |
| 849 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) |
| 850 | return -ESOCKTNOSUPPORT; |
| 851 | |
Eric Paris | c84b326 | 2009-11-05 20:45:52 -0800 | [diff] [blame] | 852 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | return -EPERM; |
| 854 | |
| 855 | sock->ops = &l2cap_sock_ops; |
| 856 | |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 857 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | if (!sk) |
| 859 | return -ENOMEM; |
| 860 | |
| 861 | l2cap_sock_init(sk, NULL); |
| 862 | return 0; |
| 863 | } |
| 864 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 865 | 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] | 866 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | struct sock *sk = sock->sk; |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 868 | struct sockaddr_l2 la; |
| 869 | int len, err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 871 | BT_DBG("sk %p", sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | |
| 873 | if (!addr || addr->sa_family != AF_BLUETOOTH) |
| 874 | return -EINVAL; |
| 875 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 876 | memset(&la, 0, sizeof(la)); |
| 877 | len = min_t(unsigned int, sizeof(la), alen); |
| 878 | memcpy(&la, addr, len); |
| 879 | |
Marcel Holtmann | 2a517ca | 2009-02-16 03:20:31 +0100 | [diff] [blame] | 880 | if (la.l2_cid) |
| 881 | return -EINVAL; |
| 882 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | lock_sock(sk); |
| 884 | |
| 885 | if (sk->sk_state != BT_OPEN) { |
| 886 | err = -EBADFD; |
| 887 | goto done; |
| 888 | } |
| 889 | |
Marcel Holtmann | b4324b5 | 2009-06-07 18:06:51 +0200 | [diff] [blame] | 890 | if (la.l2_psm && __le16_to_cpu(la.l2_psm) < 0x1001 && |
Marcel Holtmann | 847641d | 2007-01-22 22:00:45 +0100 | [diff] [blame] | 891 | !capable(CAP_NET_BIND_SERVICE)) { |
| 892 | err = -EACCES; |
| 893 | goto done; |
| 894 | } |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 895 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | write_lock_bh(&l2cap_sk_list.lock); |
| 897 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 898 | 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] | 899 | err = -EADDRINUSE; |
| 900 | } else { |
| 901 | /* Save source address */ |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 902 | bacpy(&bt_sk(sk)->src, &la.l2_bdaddr); |
| 903 | l2cap_pi(sk)->psm = la.l2_psm; |
| 904 | l2cap_pi(sk)->sport = la.l2_psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | sk->sk_state = BT_BOUND; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 906 | |
Marcel Holtmann | b4324b5 | 2009-06-07 18:06:51 +0200 | [diff] [blame] | 907 | if (__le16_to_cpu(la.l2_psm) == 0x0001 || |
| 908 | __le16_to_cpu(la.l2_psm) == 0x0003) |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 909 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | } |
| 911 | |
| 912 | write_unlock_bh(&l2cap_sk_list.lock); |
| 913 | |
| 914 | done: |
| 915 | release_sock(sk); |
| 916 | return err; |
| 917 | } |
| 918 | |
| 919 | static int l2cap_do_connect(struct sock *sk) |
| 920 | { |
| 921 | bdaddr_t *src = &bt_sk(sk)->src; |
| 922 | bdaddr_t *dst = &bt_sk(sk)->dst; |
| 923 | struct l2cap_conn *conn; |
| 924 | struct hci_conn *hcon; |
| 925 | struct hci_dev *hdev; |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 926 | __u8 auth_type; |
Marcel Holtmann | 44d0e48 | 2009-04-20 07:09:16 +0200 | [diff] [blame] | 927 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 929 | BT_DBG("%s -> %s psm 0x%2.2x", batostr(src), batostr(dst), |
| 930 | l2cap_pi(sk)->psm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 932 | hdev = hci_get_route(dst, src); |
| 933 | if (!hdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | return -EHOSTUNREACH; |
| 935 | |
| 936 | hci_dev_lock_bh(hdev); |
| 937 | |
| 938 | err = -ENOMEM; |
| 939 | |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 940 | if (sk->sk_type == SOCK_RAW) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 941 | switch (l2cap_pi(sk)->sec_level) { |
| 942 | case BT_SECURITY_HIGH: |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 943 | auth_type = HCI_AT_DEDICATED_BONDING_MITM; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 944 | break; |
| 945 | case BT_SECURITY_MEDIUM: |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 946 | auth_type = HCI_AT_DEDICATED_BONDING; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 947 | break; |
| 948 | default: |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 949 | auth_type = HCI_AT_NO_BONDING; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 950 | break; |
| 951 | } |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 952 | } else if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 953 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 954 | auth_type = HCI_AT_NO_BONDING_MITM; |
| 955 | else |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 956 | auth_type = HCI_AT_NO_BONDING; |
Marcel Holtmann | 435fef2 | 2009-02-09 03:55:28 +0100 | [diff] [blame] | 957 | |
| 958 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) |
| 959 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 960 | } else { |
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_GENERAL_BONDING_MITM; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 964 | break; |
| 965 | case BT_SECURITY_MEDIUM: |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 966 | auth_type = HCI_AT_GENERAL_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 | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 972 | } |
| 973 | |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 974 | hcon = hci_connect(hdev, ACL_LINK, dst, |
| 975 | l2cap_pi(sk)->sec_level, auth_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | if (!hcon) |
| 977 | goto done; |
| 978 | |
| 979 | conn = l2cap_conn_add(hcon, 0); |
| 980 | if (!conn) { |
| 981 | hci_conn_put(hcon); |
| 982 | goto done; |
| 983 | } |
| 984 | |
| 985 | err = 0; |
| 986 | |
| 987 | /* Update source addr of the socket */ |
| 988 | bacpy(src, conn->src); |
| 989 | |
| 990 | l2cap_chan_add(conn, sk, NULL); |
| 991 | |
| 992 | sk->sk_state = BT_CONNECT; |
| 993 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); |
| 994 | |
| 995 | if (hcon->state == BT_CONNECTED) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 996 | if (sk->sk_type != SOCK_SEQPACKET) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | l2cap_sock_clear_timer(sk); |
| 998 | sk->sk_state = BT_CONNECTED; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 999 | } else |
| 1000 | l2cap_do_start(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | } |
| 1002 | |
| 1003 | done: |
| 1004 | hci_dev_unlock_bh(hdev); |
| 1005 | hci_dev_put(hdev); |
| 1006 | return err; |
| 1007 | } |
| 1008 | |
| 1009 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) |
| 1010 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | struct sock *sk = sock->sk; |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1012 | struct sockaddr_l2 la; |
| 1013 | int len, err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | BT_DBG("sk %p", sk); |
| 1016 | |
Changli Gao | 6503d96 | 2010-03-31 22:58:26 +0000 | [diff] [blame] | 1017 | if (!addr || alen < sizeof(addr->sa_family) || |
| 1018 | addr->sa_family != AF_BLUETOOTH) |
Marcel Holtmann | 2a517ca | 2009-02-16 03:20:31 +0100 | [diff] [blame] | 1019 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1021 | memset(&la, 0, sizeof(la)); |
| 1022 | len = min_t(unsigned int, sizeof(la), alen); |
| 1023 | memcpy(&la, addr, len); |
| 1024 | |
Marcel Holtmann | 2a517ca | 2009-02-16 03:20:31 +0100 | [diff] [blame] | 1025 | if (la.l2_cid) |
| 1026 | return -EINVAL; |
| 1027 | |
| 1028 | lock_sock(sk); |
| 1029 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1030 | if (sk->sk_type == SOCK_SEQPACKET && !la.l2_psm) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | err = -EINVAL; |
| 1032 | goto done; |
| 1033 | } |
| 1034 | |
Marcel Holtmann | c6b03cf | 2009-05-02 22:31:10 -0700 | [diff] [blame] | 1035 | switch (l2cap_pi(sk)->mode) { |
| 1036 | case L2CAP_MODE_BASIC: |
| 1037 | break; |
| 1038 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1039 | case L2CAP_MODE_STREAMING: |
Marcel Holtmann | c6b03cf | 2009-05-02 22:31:10 -0700 | [diff] [blame] | 1040 | if (enable_ertm) |
| 1041 | break; |
| 1042 | /* fall through */ |
| 1043 | default: |
| 1044 | err = -ENOTSUPP; |
| 1045 | goto done; |
| 1046 | } |
| 1047 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 1048 | switch (sk->sk_state) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | case BT_CONNECT: |
| 1050 | case BT_CONNECT2: |
| 1051 | case BT_CONFIG: |
| 1052 | /* Already connecting */ |
| 1053 | goto wait; |
| 1054 | |
| 1055 | case BT_CONNECTED: |
| 1056 | /* Already connected */ |
| 1057 | goto done; |
| 1058 | |
| 1059 | case BT_OPEN: |
| 1060 | case BT_BOUND: |
| 1061 | /* Can connect */ |
| 1062 | break; |
| 1063 | |
| 1064 | default: |
| 1065 | err = -EBADFD; |
| 1066 | goto done; |
| 1067 | } |
| 1068 | |
| 1069 | /* Set destination address and psm */ |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1070 | bacpy(&bt_sk(sk)->dst, &la.l2_bdaddr); |
| 1071 | l2cap_pi(sk)->psm = la.l2_psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1072 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 1073 | err = l2cap_do_connect(sk); |
| 1074 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | goto done; |
| 1076 | |
| 1077 | wait: |
| 1078 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
| 1079 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
| 1080 | done: |
| 1081 | release_sock(sk); |
| 1082 | return err; |
| 1083 | } |
| 1084 | |
| 1085 | static int l2cap_sock_listen(struct socket *sock, int backlog) |
| 1086 | { |
| 1087 | struct sock *sk = sock->sk; |
| 1088 | int err = 0; |
| 1089 | |
| 1090 | BT_DBG("sk %p backlog %d", sk, backlog); |
| 1091 | |
| 1092 | lock_sock(sk); |
| 1093 | |
| 1094 | if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) { |
| 1095 | err = -EBADFD; |
| 1096 | goto done; |
| 1097 | } |
| 1098 | |
Marcel Holtmann | c6b03cf | 2009-05-02 22:31:10 -0700 | [diff] [blame] | 1099 | switch (l2cap_pi(sk)->mode) { |
| 1100 | case L2CAP_MODE_BASIC: |
| 1101 | break; |
| 1102 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1103 | case L2CAP_MODE_STREAMING: |
Marcel Holtmann | c6b03cf | 2009-05-02 22:31:10 -0700 | [diff] [blame] | 1104 | if (enable_ertm) |
| 1105 | break; |
| 1106 | /* fall through */ |
| 1107 | default: |
| 1108 | err = -ENOTSUPP; |
| 1109 | goto done; |
| 1110 | } |
| 1111 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | if (!l2cap_pi(sk)->psm) { |
| 1113 | bdaddr_t *src = &bt_sk(sk)->src; |
| 1114 | u16 psm; |
| 1115 | |
| 1116 | err = -EINVAL; |
| 1117 | |
| 1118 | write_lock_bh(&l2cap_sk_list.lock); |
| 1119 | |
| 1120 | for (psm = 0x1001; psm < 0x1100; psm += 2) |
Marcel Holtmann | b4324b5 | 2009-06-07 18:06:51 +0200 | [diff] [blame] | 1121 | if (!__l2cap_get_sock_by_addr(cpu_to_le16(psm), src)) { |
| 1122 | l2cap_pi(sk)->psm = cpu_to_le16(psm); |
| 1123 | l2cap_pi(sk)->sport = cpu_to_le16(psm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | err = 0; |
| 1125 | break; |
| 1126 | } |
| 1127 | |
| 1128 | write_unlock_bh(&l2cap_sk_list.lock); |
| 1129 | |
| 1130 | if (err < 0) |
| 1131 | goto done; |
| 1132 | } |
| 1133 | |
| 1134 | sk->sk_max_ack_backlog = backlog; |
| 1135 | sk->sk_ack_backlog = 0; |
| 1136 | sk->sk_state = BT_LISTEN; |
| 1137 | |
| 1138 | done: |
| 1139 | release_sock(sk); |
| 1140 | return err; |
| 1141 | } |
| 1142 | |
| 1143 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) |
| 1144 | { |
| 1145 | DECLARE_WAITQUEUE(wait, current); |
| 1146 | struct sock *sk = sock->sk, *nsk; |
| 1147 | long timeo; |
| 1148 | int err = 0; |
| 1149 | |
Peter Zijlstra | fcc70d5 | 2006-11-08 22:44:35 -0800 | [diff] [blame] | 1150 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | |
| 1152 | if (sk->sk_state != BT_LISTEN) { |
| 1153 | err = -EBADFD; |
| 1154 | goto done; |
| 1155 | } |
| 1156 | |
| 1157 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
| 1158 | |
| 1159 | BT_DBG("sk %p timeo %ld", sk, timeo); |
| 1160 | |
| 1161 | /* Wait for an incoming connection. (wake-one). */ |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 1162 | add_wait_queue_exclusive(sk_sleep(sk), &wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1163 | while (!(nsk = bt_accept_dequeue(sk, newsock))) { |
| 1164 | set_current_state(TASK_INTERRUPTIBLE); |
| 1165 | if (!timeo) { |
| 1166 | err = -EAGAIN; |
| 1167 | break; |
| 1168 | } |
| 1169 | |
| 1170 | release_sock(sk); |
| 1171 | timeo = schedule_timeout(timeo); |
Peter Zijlstra | fcc70d5 | 2006-11-08 22:44:35 -0800 | [diff] [blame] | 1172 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1173 | |
| 1174 | if (sk->sk_state != BT_LISTEN) { |
| 1175 | err = -EBADFD; |
| 1176 | break; |
| 1177 | } |
| 1178 | |
| 1179 | if (signal_pending(current)) { |
| 1180 | err = sock_intr_errno(timeo); |
| 1181 | break; |
| 1182 | } |
| 1183 | } |
| 1184 | set_current_state(TASK_RUNNING); |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 1185 | remove_wait_queue(sk_sleep(sk), &wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1186 | |
| 1187 | if (err) |
| 1188 | goto done; |
| 1189 | |
| 1190 | newsock->state = SS_CONNECTED; |
| 1191 | |
| 1192 | BT_DBG("new socket %p", nsk); |
| 1193 | |
| 1194 | done: |
| 1195 | release_sock(sk); |
| 1196 | return err; |
| 1197 | } |
| 1198 | |
| 1199 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) |
| 1200 | { |
| 1201 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; |
| 1202 | struct sock *sk = sock->sk; |
| 1203 | |
| 1204 | BT_DBG("sock %p, sk %p", sock, sk); |
| 1205 | |
| 1206 | addr->sa_family = AF_BLUETOOTH; |
| 1207 | *len = sizeof(struct sockaddr_l2); |
| 1208 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1209 | if (peer) { |
| 1210 | la->l2_psm = l2cap_pi(sk)->psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1211 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); |
Marcel Holtmann | b4324b5 | 2009-06-07 18:06:51 +0200 | [diff] [blame] | 1212 | la->l2_cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1213 | } else { |
| 1214 | la->l2_psm = l2cap_pi(sk)->sport; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); |
Marcel Holtmann | b4324b5 | 2009-06-07 18:06:51 +0200 | [diff] [blame] | 1216 | la->l2_cid = cpu_to_le16(l2cap_pi(sk)->scid); |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1217 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1219 | return 0; |
| 1220 | } |
| 1221 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1222 | static void l2cap_monitor_timeout(unsigned long arg) |
| 1223 | { |
| 1224 | struct sock *sk = (void *) arg; |
| 1225 | u16 control; |
| 1226 | |
Gustavo F. Padovan | e686219 | 2009-08-24 00:45:19 -0300 | [diff] [blame] | 1227 | bh_lock_sock(sk); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1228 | if (l2cap_pi(sk)->retry_count >= l2cap_pi(sk)->remote_max_tx) { |
| 1229 | l2cap_send_disconn_req(l2cap_pi(sk)->conn, sk); |
Andrei Emeltchenko | b13f586 | 2009-12-15 11:38:04 +0200 | [diff] [blame] | 1230 | bh_unlock_sock(sk); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1231 | return; |
| 1232 | } |
| 1233 | |
| 1234 | l2cap_pi(sk)->retry_count++; |
| 1235 | __mod_monitor_timer(); |
| 1236 | |
| 1237 | control = L2CAP_CTRL_POLL; |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 1238 | l2cap_send_rr_or_rnr(l2cap_pi(sk), control); |
Gustavo F. Padovan | e686219 | 2009-08-24 00:45:19 -0300 | [diff] [blame] | 1239 | bh_unlock_sock(sk); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1240 | } |
| 1241 | |
| 1242 | static void l2cap_retrans_timeout(unsigned long arg) |
| 1243 | { |
| 1244 | struct sock *sk = (void *) arg; |
| 1245 | u16 control; |
| 1246 | |
Gustavo F. Padovan | e686219 | 2009-08-24 00:45:19 -0300 | [diff] [blame] | 1247 | bh_lock_sock(sk); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1248 | l2cap_pi(sk)->retry_count = 1; |
| 1249 | __mod_monitor_timer(); |
| 1250 | |
| 1251 | l2cap_pi(sk)->conn_state |= L2CAP_CONN_WAIT_F; |
| 1252 | |
| 1253 | control = L2CAP_CTRL_POLL; |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 1254 | l2cap_send_rr_or_rnr(l2cap_pi(sk), control); |
Gustavo F. Padovan | e686219 | 2009-08-24 00:45:19 -0300 | [diff] [blame] | 1255 | bh_unlock_sock(sk); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1256 | } |
| 1257 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1258 | static void l2cap_drop_acked_frames(struct sock *sk) |
| 1259 | { |
| 1260 | struct sk_buff *skb; |
| 1261 | |
| 1262 | while ((skb = skb_peek(TX_QUEUE(sk)))) { |
| 1263 | if (bt_cb(skb)->tx_seq == l2cap_pi(sk)->expected_ack_seq) |
| 1264 | break; |
| 1265 | |
| 1266 | skb = skb_dequeue(TX_QUEUE(sk)); |
| 1267 | kfree_skb(skb); |
| 1268 | |
| 1269 | l2cap_pi(sk)->unacked_frames--; |
| 1270 | } |
| 1271 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1272 | if (!l2cap_pi(sk)->unacked_frames) |
| 1273 | del_timer(&l2cap_pi(sk)->retrans_timer); |
| 1274 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1275 | return; |
| 1276 | } |
| 1277 | |
| 1278 | static inline int l2cap_do_send(struct sock *sk, struct sk_buff *skb) |
| 1279 | { |
| 1280 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 1281 | int err; |
| 1282 | |
| 1283 | BT_DBG("sk %p, skb %p len %d", sk, skb, skb->len); |
| 1284 | |
| 1285 | err = hci_send_acl(pi->conn->hcon, skb, 0); |
| 1286 | if (err < 0) |
| 1287 | kfree_skb(skb); |
| 1288 | |
| 1289 | return err; |
| 1290 | } |
| 1291 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1292 | static int l2cap_streaming_send(struct sock *sk) |
| 1293 | { |
| 1294 | struct sk_buff *skb, *tx_skb; |
| 1295 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1296 | u16 control, fcs; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1297 | int err; |
| 1298 | |
| 1299 | while ((skb = sk->sk_send_head)) { |
| 1300 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
| 1301 | |
| 1302 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); |
| 1303 | control |= pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT; |
| 1304 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); |
| 1305 | |
Gustavo F. Padovan | e8235c6 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 1306 | if (pi->fcs == L2CAP_FCS_CRC16) { |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1307 | fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2); |
| 1308 | put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2); |
| 1309 | } |
| 1310 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1311 | err = l2cap_do_send(sk, tx_skb); |
| 1312 | if (err < 0) { |
| 1313 | l2cap_send_disconn_req(pi->conn, sk); |
| 1314 | return err; |
| 1315 | } |
| 1316 | |
| 1317 | pi->next_tx_seq = (pi->next_tx_seq + 1) % 64; |
| 1318 | |
| 1319 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) |
| 1320 | sk->sk_send_head = NULL; |
| 1321 | else |
| 1322 | sk->sk_send_head = skb_queue_next(TX_QUEUE(sk), skb); |
| 1323 | |
| 1324 | skb = skb_dequeue(TX_QUEUE(sk)); |
| 1325 | kfree_skb(skb); |
| 1326 | } |
| 1327 | return 0; |
| 1328 | } |
| 1329 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1330 | static int l2cap_retransmit_frame(struct sock *sk, u8 tx_seq) |
| 1331 | { |
| 1332 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 1333 | struct sk_buff *skb, *tx_skb; |
| 1334 | u16 control, fcs; |
| 1335 | int err; |
| 1336 | |
| 1337 | skb = skb_peek(TX_QUEUE(sk)); |
| 1338 | do { |
| 1339 | if (bt_cb(skb)->tx_seq != tx_seq) { |
| 1340 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) |
| 1341 | break; |
| 1342 | skb = skb_queue_next(TX_QUEUE(sk), skb); |
| 1343 | continue; |
| 1344 | } |
| 1345 | |
| 1346 | if (pi->remote_max_tx && |
| 1347 | bt_cb(skb)->retries == pi->remote_max_tx) { |
| 1348 | l2cap_send_disconn_req(pi->conn, sk); |
| 1349 | break; |
| 1350 | } |
| 1351 | |
| 1352 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
| 1353 | bt_cb(skb)->retries++; |
| 1354 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); |
Gustavo F. Padovan | 9f121a5 | 2009-10-03 02:34:38 -0300 | [diff] [blame] | 1355 | control |= (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT) |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1356 | | (tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); |
| 1357 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); |
| 1358 | |
Gustavo F. Padovan | e8235c6 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 1359 | if (pi->fcs == L2CAP_FCS_CRC16) { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1360 | fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2); |
| 1361 | put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2); |
| 1362 | } |
| 1363 | |
| 1364 | err = l2cap_do_send(sk, tx_skb); |
| 1365 | if (err < 0) { |
| 1366 | l2cap_send_disconn_req(pi->conn, sk); |
| 1367 | return err; |
| 1368 | } |
| 1369 | break; |
| 1370 | } while(1); |
| 1371 | return 0; |
| 1372 | } |
| 1373 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1374 | static int l2cap_ertm_send(struct sock *sk) |
| 1375 | { |
| 1376 | struct sk_buff *skb, *tx_skb; |
| 1377 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1378 | u16 control, fcs; |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1379 | int err, nsent = 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1380 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1381 | if (pi->conn_state & L2CAP_CONN_WAIT_F) |
| 1382 | return 0; |
| 1383 | |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 1384 | while ((skb = sk->sk_send_head) && (!l2cap_tx_window_full(sk)) && |
| 1385 | !(pi->conn_state & L2CAP_CONN_REMOTE_BUSY)) { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1386 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1387 | if (pi->remote_max_tx && |
| 1388 | bt_cb(skb)->retries == pi->remote_max_tx) { |
| 1389 | l2cap_send_disconn_req(pi->conn, sk); |
| 1390 | break; |
| 1391 | } |
| 1392 | |
Andrei Emeltchenko | e420aba | 2009-12-23 13:07:14 +0200 | [diff] [blame] | 1393 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
| 1394 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1395 | bt_cb(skb)->retries++; |
| 1396 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1397 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 1398 | if (pi->conn_state & L2CAP_CONN_SEND_FBIT) { |
| 1399 | control |= L2CAP_CTRL_FINAL; |
| 1400 | pi->conn_state &= ~L2CAP_CONN_SEND_FBIT; |
| 1401 | } |
Gustavo F. Padovan | 9f121a5 | 2009-10-03 02:34:38 -0300 | [diff] [blame] | 1402 | control |= (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1403 | | (pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); |
| 1404 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); |
| 1405 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1406 | |
Gustavo F. Padovan | e8235c6 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 1407 | if (pi->fcs == L2CAP_FCS_CRC16) { |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1408 | fcs = crc16(0, (u8 *)skb->data, tx_skb->len - 2); |
| 1409 | put_unaligned_le16(fcs, skb->data + tx_skb->len - 2); |
| 1410 | } |
| 1411 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1412 | err = l2cap_do_send(sk, tx_skb); |
| 1413 | if (err < 0) { |
| 1414 | l2cap_send_disconn_req(pi->conn, sk); |
| 1415 | return err; |
| 1416 | } |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1417 | __mod_retrans_timer(); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1418 | |
| 1419 | bt_cb(skb)->tx_seq = pi->next_tx_seq; |
| 1420 | pi->next_tx_seq = (pi->next_tx_seq + 1) % 64; |
| 1421 | |
| 1422 | pi->unacked_frames++; |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 1423 | pi->frames_sent++; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1424 | |
| 1425 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) |
| 1426 | sk->sk_send_head = NULL; |
| 1427 | else |
| 1428 | sk->sk_send_head = skb_queue_next(TX_QUEUE(sk), skb); |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1429 | |
| 1430 | nsent++; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1431 | } |
| 1432 | |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1433 | return nsent; |
| 1434 | } |
| 1435 | |
| 1436 | static int l2cap_send_ack(struct l2cap_pinfo *pi) |
| 1437 | { |
| 1438 | struct sock *sk = (struct sock *)pi; |
| 1439 | u16 control = 0; |
| 1440 | |
| 1441 | control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
| 1442 | |
| 1443 | if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) { |
| 1444 | control |= L2CAP_SUPER_RCV_NOT_READY; |
| 1445 | return l2cap_send_sframe(pi, control); |
| 1446 | } else if (l2cap_ertm_send(sk) == 0) { |
| 1447 | control |= L2CAP_SUPER_RCV_READY; |
| 1448 | return l2cap_send_sframe(pi, control); |
| 1449 | } |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1450 | return 0; |
| 1451 | } |
| 1452 | |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 1453 | static int l2cap_send_srejtail(struct sock *sk) |
| 1454 | { |
| 1455 | struct srej_list *tail; |
| 1456 | u16 control; |
| 1457 | |
| 1458 | control = L2CAP_SUPER_SELECT_REJECT; |
| 1459 | control |= L2CAP_CTRL_FINAL; |
| 1460 | |
| 1461 | tail = list_entry(SREJ_LIST(sk)->prev, struct srej_list, list); |
| 1462 | control |= tail->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
| 1463 | |
| 1464 | l2cap_send_sframe(l2cap_pi(sk), control); |
| 1465 | |
| 1466 | return 0; |
| 1467 | } |
| 1468 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1469 | 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] | 1470 | { |
| 1471 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1472 | struct sk_buff **frag; |
| 1473 | int err, sent = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1474 | |
| 1475 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1476 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1477 | } |
| 1478 | |
| 1479 | sent += count; |
| 1480 | len -= count; |
| 1481 | |
| 1482 | /* Continuation fragments (no L2CAP header) */ |
| 1483 | frag = &skb_shinfo(skb)->frag_list; |
| 1484 | while (len) { |
| 1485 | count = min_t(unsigned int, conn->mtu, len); |
| 1486 | |
| 1487 | *frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err); |
| 1488 | if (!*frag) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1489 | return -EFAULT; |
| 1490 | if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) |
| 1491 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1492 | |
| 1493 | sent += count; |
| 1494 | len -= count; |
| 1495 | |
| 1496 | frag = &(*frag)->next; |
| 1497 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1498 | |
| 1499 | return sent; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1500 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1501 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1502 | static struct sk_buff *l2cap_create_connless_pdu(struct sock *sk, struct msghdr *msg, size_t len) |
| 1503 | { |
| 1504 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 1505 | struct sk_buff *skb; |
| 1506 | int err, count, hlen = L2CAP_HDR_SIZE + 2; |
| 1507 | struct l2cap_hdr *lh; |
| 1508 | |
| 1509 | BT_DBG("sk %p len %d", sk, (int)len); |
| 1510 | |
| 1511 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
| 1512 | skb = bt_skb_send_alloc(sk, count + hlen, |
| 1513 | msg->msg_flags & MSG_DONTWAIT, &err); |
| 1514 | if (!skb) |
| 1515 | return ERR_PTR(-ENOMEM); |
| 1516 | |
| 1517 | /* Create L2CAP header */ |
| 1518 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
| 1519 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 1520 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); |
| 1521 | put_unaligned_le16(l2cap_pi(sk)->psm, skb_put(skb, 2)); |
| 1522 | |
| 1523 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); |
| 1524 | if (unlikely(err < 0)) { |
| 1525 | kfree_skb(skb); |
| 1526 | return ERR_PTR(err); |
| 1527 | } |
| 1528 | return skb; |
| 1529 | } |
| 1530 | |
| 1531 | static struct sk_buff *l2cap_create_basic_pdu(struct sock *sk, struct msghdr *msg, size_t len) |
| 1532 | { |
| 1533 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 1534 | struct sk_buff *skb; |
| 1535 | int err, count, hlen = L2CAP_HDR_SIZE; |
| 1536 | struct l2cap_hdr *lh; |
| 1537 | |
| 1538 | BT_DBG("sk %p len %d", sk, (int)len); |
| 1539 | |
| 1540 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
| 1541 | skb = bt_skb_send_alloc(sk, count + hlen, |
| 1542 | msg->msg_flags & MSG_DONTWAIT, &err); |
| 1543 | if (!skb) |
| 1544 | return ERR_PTR(-ENOMEM); |
| 1545 | |
| 1546 | /* Create L2CAP header */ |
| 1547 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
| 1548 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 1549 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); |
| 1550 | |
| 1551 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); |
| 1552 | if (unlikely(err < 0)) { |
| 1553 | kfree_skb(skb); |
| 1554 | return ERR_PTR(err); |
| 1555 | } |
| 1556 | return skb; |
| 1557 | } |
| 1558 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1559 | 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] | 1560 | { |
| 1561 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 1562 | struct sk_buff *skb; |
| 1563 | int err, count, hlen = L2CAP_HDR_SIZE + 2; |
| 1564 | struct l2cap_hdr *lh; |
| 1565 | |
| 1566 | BT_DBG("sk %p len %d", sk, (int)len); |
| 1567 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1568 | if (sdulen) |
| 1569 | hlen += 2; |
| 1570 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1571 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) |
| 1572 | hlen += 2; |
| 1573 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1574 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
| 1575 | skb = bt_skb_send_alloc(sk, count + hlen, |
| 1576 | msg->msg_flags & MSG_DONTWAIT, &err); |
| 1577 | if (!skb) |
| 1578 | return ERR_PTR(-ENOMEM); |
| 1579 | |
| 1580 | /* Create L2CAP header */ |
| 1581 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
| 1582 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 1583 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); |
| 1584 | put_unaligned_le16(control, skb_put(skb, 2)); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1585 | if (sdulen) |
| 1586 | put_unaligned_le16(sdulen, skb_put(skb, 2)); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1587 | |
| 1588 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); |
| 1589 | if (unlikely(err < 0)) { |
| 1590 | kfree_skb(skb); |
| 1591 | return ERR_PTR(err); |
| 1592 | } |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1593 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1594 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) |
| 1595 | put_unaligned_le16(0, skb_put(skb, 2)); |
| 1596 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1597 | bt_cb(skb)->retries = 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1598 | return skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1599 | } |
| 1600 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1601 | static inline int l2cap_sar_segment_sdu(struct sock *sk, struct msghdr *msg, size_t len) |
| 1602 | { |
| 1603 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 1604 | struct sk_buff *skb; |
| 1605 | struct sk_buff_head sar_queue; |
| 1606 | u16 control; |
| 1607 | size_t size = 0; |
| 1608 | |
| 1609 | __skb_queue_head_init(&sar_queue); |
| 1610 | control = L2CAP_SDU_START; |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 1611 | 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] | 1612 | if (IS_ERR(skb)) |
| 1613 | return PTR_ERR(skb); |
| 1614 | |
| 1615 | __skb_queue_tail(&sar_queue, skb); |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 1616 | len -= pi->remote_mps; |
| 1617 | size += pi->remote_mps; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1618 | control = 0; |
| 1619 | |
| 1620 | while (len > 0) { |
| 1621 | size_t buflen; |
| 1622 | |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 1623 | if (len > pi->remote_mps) { |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1624 | control |= L2CAP_SDU_CONTINUE; |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 1625 | buflen = pi->remote_mps; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1626 | } else { |
| 1627 | control |= L2CAP_SDU_END; |
| 1628 | buflen = len; |
| 1629 | } |
| 1630 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1631 | skb = l2cap_create_iframe_pdu(sk, msg, buflen, control, 0); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1632 | if (IS_ERR(skb)) { |
| 1633 | skb_queue_purge(&sar_queue); |
| 1634 | return PTR_ERR(skb); |
| 1635 | } |
| 1636 | |
| 1637 | __skb_queue_tail(&sar_queue, skb); |
| 1638 | len -= buflen; |
| 1639 | size += buflen; |
| 1640 | control = 0; |
| 1641 | } |
| 1642 | skb_queue_splice_tail(&sar_queue, TX_QUEUE(sk)); |
| 1643 | if (sk->sk_send_head == NULL) |
| 1644 | sk->sk_send_head = sar_queue.next; |
| 1645 | |
| 1646 | return size; |
| 1647 | } |
| 1648 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1649 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) |
| 1650 | { |
| 1651 | struct sock *sk = sock->sk; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1652 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 1653 | struct sk_buff *skb; |
| 1654 | u16 control; |
| 1655 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1656 | |
| 1657 | BT_DBG("sock %p, sk %p", sock, sk); |
| 1658 | |
Benjamin LaHaise | c1cbe4b | 2005-12-13 23:22:19 -0800 | [diff] [blame] | 1659 | err = sock_error(sk); |
| 1660 | if (err) |
| 1661 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1662 | |
| 1663 | if (msg->msg_flags & MSG_OOB) |
| 1664 | return -EOPNOTSUPP; |
| 1665 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1666 | lock_sock(sk); |
| 1667 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1668 | if (sk->sk_state != BT_CONNECTED) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1669 | err = -ENOTCONN; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1670 | goto done; |
| 1671 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1672 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1673 | /* Connectionless channel */ |
| 1674 | if (sk->sk_type == SOCK_DGRAM) { |
| 1675 | skb = l2cap_create_connless_pdu(sk, msg, len); |
Dan Carpenter | 477fffb | 2010-04-21 23:52:01 +0000 | [diff] [blame] | 1676 | if (IS_ERR(skb)) |
| 1677 | err = PTR_ERR(skb); |
| 1678 | else |
| 1679 | err = l2cap_do_send(sk, skb); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1680 | goto done; |
| 1681 | } |
| 1682 | |
| 1683 | switch (pi->mode) { |
| 1684 | case L2CAP_MODE_BASIC: |
Gustavo F. Padovan | c69163e | 2010-05-01 16:15:35 -0300 | [diff] [blame] | 1685 | /* Check outgoing MTU */ |
| 1686 | if (len > pi->omtu) { |
| 1687 | err = -EINVAL; |
| 1688 | goto done; |
| 1689 | } |
| 1690 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1691 | /* Create a basic PDU */ |
| 1692 | skb = l2cap_create_basic_pdu(sk, msg, len); |
| 1693 | if (IS_ERR(skb)) { |
| 1694 | err = PTR_ERR(skb); |
| 1695 | goto done; |
| 1696 | } |
| 1697 | |
| 1698 | err = l2cap_do_send(sk, skb); |
| 1699 | if (!err) |
| 1700 | err = len; |
| 1701 | break; |
| 1702 | |
| 1703 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1704 | case L2CAP_MODE_STREAMING: |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1705 | /* Entire SDU fits into one PDU */ |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 1706 | if (len <= pi->remote_mps) { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1707 | control = L2CAP_SDU_UNSEGMENTED; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1708 | skb = l2cap_create_iframe_pdu(sk, msg, len, control, 0); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1709 | if (IS_ERR(skb)) { |
| 1710 | err = PTR_ERR(skb); |
| 1711 | goto done; |
| 1712 | } |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1713 | __skb_queue_tail(TX_QUEUE(sk), skb); |
| 1714 | if (sk->sk_send_head == NULL) |
| 1715 | sk->sk_send_head = skb; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1716 | } else { |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1717 | /* Segment SDU into multiples PDUs */ |
| 1718 | err = l2cap_sar_segment_sdu(sk, msg, len); |
| 1719 | if (err < 0) |
| 1720 | goto done; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1721 | } |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1722 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1723 | if (pi->mode == L2CAP_MODE_STREAMING) |
| 1724 | err = l2cap_streaming_send(sk); |
| 1725 | else |
| 1726 | err = l2cap_ertm_send(sk); |
| 1727 | |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 1728 | if (err >= 0) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1729 | err = len; |
| 1730 | break; |
| 1731 | |
| 1732 | default: |
| 1733 | BT_DBG("bad state %1.1x", pi->mode); |
| 1734 | err = -EINVAL; |
| 1735 | } |
| 1736 | |
| 1737 | done: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1738 | release_sock(sk); |
| 1739 | return err; |
| 1740 | } |
| 1741 | |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 1742 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) |
| 1743 | { |
| 1744 | struct sock *sk = sock->sk; |
| 1745 | |
| 1746 | lock_sock(sk); |
| 1747 | |
| 1748 | if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) { |
| 1749 | struct l2cap_conn_rsp rsp; |
| 1750 | |
| 1751 | sk->sk_state = BT_CONFIG; |
| 1752 | |
| 1753 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 1754 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 1755 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); |
| 1756 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 1757 | l2cap_send_cmd(l2cap_pi(sk)->conn, l2cap_pi(sk)->ident, |
| 1758 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
| 1759 | |
| 1760 | release_sock(sk); |
| 1761 | return 0; |
| 1762 | } |
| 1763 | |
| 1764 | release_sock(sk); |
| 1765 | |
| 1766 | return bt_sock_recvmsg(iocb, sock, msg, len, flags); |
| 1767 | } |
| 1768 | |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 1769 | 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] | 1770 | { |
| 1771 | struct sock *sk = sock->sk; |
| 1772 | struct l2cap_options opts; |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1773 | int len, err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1774 | u32 opt; |
| 1775 | |
| 1776 | BT_DBG("sk %p", sk); |
| 1777 | |
| 1778 | lock_sock(sk); |
| 1779 | |
| 1780 | switch (optname) { |
| 1781 | case L2CAP_OPTIONS: |
Marcel Holtmann | 0878b66 | 2007-05-05 00:35:59 +0200 | [diff] [blame] | 1782 | opts.imtu = l2cap_pi(sk)->imtu; |
| 1783 | opts.omtu = l2cap_pi(sk)->omtu; |
| 1784 | opts.flush_to = l2cap_pi(sk)->flush_to; |
Marcel Holtmann | c6b03cf | 2009-05-02 22:31:10 -0700 | [diff] [blame] | 1785 | opts.mode = l2cap_pi(sk)->mode; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1786 | opts.fcs = l2cap_pi(sk)->fcs; |
Gustavo F. Padovan | 14b5aa7 | 2010-05-01 16:15:40 -0300 | [diff] [blame^] | 1787 | opts.txwin_size = (__u16)l2cap_pi(sk)->tx_win; |
Marcel Holtmann | 0878b66 | 2007-05-05 00:35:59 +0200 | [diff] [blame] | 1788 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1789 | len = min_t(unsigned int, sizeof(opts), optlen); |
| 1790 | if (copy_from_user((char *) &opts, optval, len)) { |
| 1791 | err = -EFAULT; |
| 1792 | break; |
| 1793 | } |
Marcel Holtmann | 0878b66 | 2007-05-05 00:35:59 +0200 | [diff] [blame] | 1794 | |
Marcel Holtmann | c6b03cf | 2009-05-02 22:31:10 -0700 | [diff] [blame] | 1795 | l2cap_pi(sk)->imtu = opts.imtu; |
| 1796 | l2cap_pi(sk)->omtu = opts.omtu; |
| 1797 | l2cap_pi(sk)->mode = opts.mode; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1798 | l2cap_pi(sk)->fcs = opts.fcs; |
Gustavo F. Padovan | 14b5aa7 | 2010-05-01 16:15:40 -0300 | [diff] [blame^] | 1799 | l2cap_pi(sk)->tx_win = (__u8)opts.txwin_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1800 | break; |
| 1801 | |
| 1802 | case L2CAP_LM: |
| 1803 | if (get_user(opt, (u32 __user *) optval)) { |
| 1804 | err = -EFAULT; |
| 1805 | break; |
| 1806 | } |
| 1807 | |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1808 | if (opt & L2CAP_LM_AUTH) |
| 1809 | l2cap_pi(sk)->sec_level = BT_SECURITY_LOW; |
| 1810 | if (opt & L2CAP_LM_ENCRYPT) |
| 1811 | l2cap_pi(sk)->sec_level = BT_SECURITY_MEDIUM; |
| 1812 | if (opt & L2CAP_LM_SECURE) |
| 1813 | l2cap_pi(sk)->sec_level = BT_SECURITY_HIGH; |
| 1814 | |
| 1815 | l2cap_pi(sk)->role_switch = (opt & L2CAP_LM_MASTER); |
| 1816 | l2cap_pi(sk)->force_reliable = (opt & L2CAP_LM_RELIABLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1817 | break; |
| 1818 | |
| 1819 | default: |
| 1820 | err = -ENOPROTOOPT; |
| 1821 | break; |
| 1822 | } |
| 1823 | |
| 1824 | release_sock(sk); |
| 1825 | return err; |
| 1826 | } |
| 1827 | |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 1828 | 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] | 1829 | { |
| 1830 | struct sock *sk = sock->sk; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1831 | struct bt_security sec; |
| 1832 | int len, err = 0; |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 1833 | u32 opt; |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 1834 | |
| 1835 | BT_DBG("sk %p", sk); |
| 1836 | |
| 1837 | if (level == SOL_L2CAP) |
| 1838 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); |
| 1839 | |
Marcel Holtmann | 0588d94 | 2009-01-16 10:06:13 +0100 | [diff] [blame] | 1840 | if (level != SOL_BLUETOOTH) |
| 1841 | return -ENOPROTOOPT; |
| 1842 | |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 1843 | lock_sock(sk); |
| 1844 | |
| 1845 | switch (optname) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1846 | case BT_SECURITY: |
Marcel Holtmann | 2526d3d | 2009-02-20 20:54:06 +0100 | [diff] [blame] | 1847 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_RAW) { |
Marcel Holtmann | 0588d94 | 2009-01-16 10:06:13 +0100 | [diff] [blame] | 1848 | err = -EINVAL; |
| 1849 | break; |
| 1850 | } |
| 1851 | |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1852 | sec.level = BT_SECURITY_LOW; |
| 1853 | |
| 1854 | len = min_t(unsigned int, sizeof(sec), optlen); |
| 1855 | if (copy_from_user((char *) &sec, optval, len)) { |
| 1856 | err = -EFAULT; |
| 1857 | break; |
| 1858 | } |
| 1859 | |
| 1860 | if (sec.level < BT_SECURITY_LOW || |
| 1861 | sec.level > BT_SECURITY_HIGH) { |
| 1862 | err = -EINVAL; |
| 1863 | break; |
| 1864 | } |
| 1865 | |
| 1866 | l2cap_pi(sk)->sec_level = sec.level; |
| 1867 | break; |
| 1868 | |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 1869 | case BT_DEFER_SETUP: |
| 1870 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { |
| 1871 | err = -EINVAL; |
| 1872 | break; |
| 1873 | } |
| 1874 | |
| 1875 | if (get_user(opt, (u32 __user *) optval)) { |
| 1876 | err = -EFAULT; |
| 1877 | break; |
| 1878 | } |
| 1879 | |
| 1880 | bt_sk(sk)->defer_setup = opt; |
| 1881 | break; |
| 1882 | |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 1883 | default: |
| 1884 | err = -ENOPROTOOPT; |
| 1885 | break; |
| 1886 | } |
| 1887 | |
| 1888 | release_sock(sk); |
| 1889 | return err; |
| 1890 | } |
| 1891 | |
| 1892 | 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] | 1893 | { |
| 1894 | struct sock *sk = sock->sk; |
| 1895 | struct l2cap_options opts; |
| 1896 | struct l2cap_conninfo cinfo; |
| 1897 | int len, err = 0; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1898 | u32 opt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1899 | |
| 1900 | BT_DBG("sk %p", sk); |
| 1901 | |
| 1902 | if (get_user(len, optlen)) |
| 1903 | return -EFAULT; |
| 1904 | |
| 1905 | lock_sock(sk); |
| 1906 | |
| 1907 | switch (optname) { |
| 1908 | case L2CAP_OPTIONS: |
| 1909 | opts.imtu = l2cap_pi(sk)->imtu; |
| 1910 | opts.omtu = l2cap_pi(sk)->omtu; |
| 1911 | opts.flush_to = l2cap_pi(sk)->flush_to; |
Marcel Holtmann | c6b03cf | 2009-05-02 22:31:10 -0700 | [diff] [blame] | 1912 | opts.mode = l2cap_pi(sk)->mode; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1913 | opts.fcs = l2cap_pi(sk)->fcs; |
Gustavo F. Padovan | 14b5aa7 | 2010-05-01 16:15:40 -0300 | [diff] [blame^] | 1914 | opts.txwin_size = (__u16)l2cap_pi(sk)->tx_win; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1915 | |
| 1916 | len = min_t(unsigned int, len, sizeof(opts)); |
| 1917 | if (copy_to_user(optval, (char *) &opts, len)) |
| 1918 | err = -EFAULT; |
| 1919 | |
| 1920 | break; |
| 1921 | |
| 1922 | case L2CAP_LM: |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1923 | switch (l2cap_pi(sk)->sec_level) { |
| 1924 | case BT_SECURITY_LOW: |
| 1925 | opt = L2CAP_LM_AUTH; |
| 1926 | break; |
| 1927 | case BT_SECURITY_MEDIUM: |
| 1928 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; |
| 1929 | break; |
| 1930 | case BT_SECURITY_HIGH: |
| 1931 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | |
| 1932 | L2CAP_LM_SECURE; |
| 1933 | break; |
| 1934 | default: |
| 1935 | opt = 0; |
| 1936 | break; |
| 1937 | } |
| 1938 | |
| 1939 | if (l2cap_pi(sk)->role_switch) |
| 1940 | opt |= L2CAP_LM_MASTER; |
| 1941 | |
| 1942 | if (l2cap_pi(sk)->force_reliable) |
| 1943 | opt |= L2CAP_LM_RELIABLE; |
| 1944 | |
| 1945 | if (put_user(opt, (u32 __user *) optval)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1946 | err = -EFAULT; |
| 1947 | break; |
| 1948 | |
| 1949 | case L2CAP_CONNINFO: |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 1950 | if (sk->sk_state != BT_CONNECTED && |
| 1951 | !(sk->sk_state == BT_CONNECT2 && |
| 1952 | bt_sk(sk)->defer_setup)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1953 | err = -ENOTCONN; |
| 1954 | break; |
| 1955 | } |
| 1956 | |
| 1957 | cinfo.hci_handle = l2cap_pi(sk)->conn->hcon->handle; |
| 1958 | memcpy(cinfo.dev_class, l2cap_pi(sk)->conn->hcon->dev_class, 3); |
| 1959 | |
| 1960 | len = min_t(unsigned int, len, sizeof(cinfo)); |
| 1961 | if (copy_to_user(optval, (char *) &cinfo, len)) |
| 1962 | err = -EFAULT; |
| 1963 | |
| 1964 | break; |
| 1965 | |
| 1966 | default: |
| 1967 | err = -ENOPROTOOPT; |
| 1968 | break; |
| 1969 | } |
| 1970 | |
| 1971 | release_sock(sk); |
| 1972 | return err; |
| 1973 | } |
| 1974 | |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 1975 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
| 1976 | { |
| 1977 | struct sock *sk = sock->sk; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1978 | struct bt_security sec; |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 1979 | int len, err = 0; |
| 1980 | |
| 1981 | BT_DBG("sk %p", sk); |
| 1982 | |
| 1983 | if (level == SOL_L2CAP) |
| 1984 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); |
| 1985 | |
Marcel Holtmann | 0588d94 | 2009-01-16 10:06:13 +0100 | [diff] [blame] | 1986 | if (level != SOL_BLUETOOTH) |
| 1987 | return -ENOPROTOOPT; |
| 1988 | |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 1989 | if (get_user(len, optlen)) |
| 1990 | return -EFAULT; |
| 1991 | |
| 1992 | lock_sock(sk); |
| 1993 | |
| 1994 | switch (optname) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1995 | case BT_SECURITY: |
Marcel Holtmann | 2526d3d | 2009-02-20 20:54:06 +0100 | [diff] [blame] | 1996 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_RAW) { |
Marcel Holtmann | 0588d94 | 2009-01-16 10:06:13 +0100 | [diff] [blame] | 1997 | err = -EINVAL; |
| 1998 | break; |
| 1999 | } |
| 2000 | |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 2001 | sec.level = l2cap_pi(sk)->sec_level; |
| 2002 | |
| 2003 | len = min_t(unsigned int, len, sizeof(sec)); |
| 2004 | if (copy_to_user(optval, (char *) &sec, len)) |
| 2005 | err = -EFAULT; |
| 2006 | |
| 2007 | break; |
| 2008 | |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 2009 | case BT_DEFER_SETUP: |
| 2010 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { |
| 2011 | err = -EINVAL; |
| 2012 | break; |
| 2013 | } |
| 2014 | |
| 2015 | if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval)) |
| 2016 | err = -EFAULT; |
| 2017 | |
| 2018 | break; |
| 2019 | |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 2020 | default: |
| 2021 | err = -ENOPROTOOPT; |
| 2022 | break; |
| 2023 | } |
| 2024 | |
| 2025 | release_sock(sk); |
| 2026 | return err; |
| 2027 | } |
| 2028 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2029 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
| 2030 | { |
| 2031 | struct sock *sk = sock->sk; |
| 2032 | int err = 0; |
| 2033 | |
| 2034 | BT_DBG("sock %p, sk %p", sock, sk); |
| 2035 | |
| 2036 | if (!sk) |
| 2037 | return 0; |
| 2038 | |
| 2039 | lock_sock(sk); |
| 2040 | if (!sk->sk_shutdown) { |
| 2041 | sk->sk_shutdown = SHUTDOWN_MASK; |
| 2042 | l2cap_sock_clear_timer(sk); |
| 2043 | __l2cap_sock_close(sk, 0); |
| 2044 | |
| 2045 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 2046 | err = bt_sock_wait_state(sk, BT_CLOSED, |
| 2047 | sk->sk_lingertime); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2048 | } |
| 2049 | release_sock(sk); |
| 2050 | return err; |
| 2051 | } |
| 2052 | |
| 2053 | static int l2cap_sock_release(struct socket *sock) |
| 2054 | { |
| 2055 | struct sock *sk = sock->sk; |
| 2056 | int err; |
| 2057 | |
| 2058 | BT_DBG("sock %p, sk %p", sock, sk); |
| 2059 | |
| 2060 | if (!sk) |
| 2061 | return 0; |
| 2062 | |
| 2063 | err = l2cap_sock_shutdown(sock, 2); |
| 2064 | |
| 2065 | sock_orphan(sk); |
| 2066 | l2cap_sock_kill(sk); |
| 2067 | return err; |
| 2068 | } |
| 2069 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2070 | static void l2cap_chan_ready(struct sock *sk) |
| 2071 | { |
| 2072 | struct sock *parent = bt_sk(sk)->parent; |
| 2073 | |
| 2074 | BT_DBG("sk %p, parent %p", sk, parent); |
| 2075 | |
| 2076 | l2cap_pi(sk)->conf_state = 0; |
| 2077 | l2cap_sock_clear_timer(sk); |
| 2078 | |
| 2079 | if (!parent) { |
| 2080 | /* Outgoing channel. |
| 2081 | * Wake up socket sleeping on connect. |
| 2082 | */ |
| 2083 | sk->sk_state = BT_CONNECTED; |
| 2084 | sk->sk_state_change(sk); |
| 2085 | } else { |
| 2086 | /* Incoming channel. |
| 2087 | * Wake up socket sleeping on accept. |
| 2088 | */ |
| 2089 | parent->sk_data_ready(parent, 0); |
| 2090 | } |
| 2091 | } |
| 2092 | |
| 2093 | /* Copy frame to all raw sockets on that connection */ |
| 2094 | static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) |
| 2095 | { |
| 2096 | struct l2cap_chan_list *l = &conn->chan_list; |
| 2097 | struct sk_buff *nskb; |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2098 | struct sock *sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2099 | |
| 2100 | BT_DBG("conn %p", conn); |
| 2101 | |
| 2102 | read_lock(&l->lock); |
| 2103 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
| 2104 | if (sk->sk_type != SOCK_RAW) |
| 2105 | continue; |
| 2106 | |
| 2107 | /* Don't send frame to the socket it came from */ |
| 2108 | if (skb->sk == sk) |
| 2109 | continue; |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2110 | nskb = skb_clone(skb, GFP_ATOMIC); |
| 2111 | if (!nskb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2112 | continue; |
| 2113 | |
| 2114 | if (sock_queue_rcv_skb(sk, nskb)) |
| 2115 | kfree_skb(nskb); |
| 2116 | } |
| 2117 | read_unlock(&l->lock); |
| 2118 | } |
| 2119 | |
| 2120 | /* ---- L2CAP signalling commands ---- */ |
| 2121 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, |
| 2122 | u8 code, u8 ident, u16 dlen, void *data) |
| 2123 | { |
| 2124 | struct sk_buff *skb, **frag; |
| 2125 | struct l2cap_cmd_hdr *cmd; |
| 2126 | struct l2cap_hdr *lh; |
| 2127 | int len, count; |
| 2128 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2129 | BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", |
| 2130 | conn, code, ident, dlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2131 | |
| 2132 | len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; |
| 2133 | count = min_t(unsigned int, conn->mtu, len); |
| 2134 | |
| 2135 | skb = bt_skb_alloc(count, GFP_ATOMIC); |
| 2136 | if (!skb) |
| 2137 | return NULL; |
| 2138 | |
| 2139 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2140 | lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 2141 | lh->cid = cpu_to_le16(L2CAP_CID_SIGNALING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2142 | |
| 2143 | cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); |
| 2144 | cmd->code = code; |
| 2145 | cmd->ident = ident; |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2146 | cmd->len = cpu_to_le16(dlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2147 | |
| 2148 | if (dlen) { |
| 2149 | count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; |
| 2150 | memcpy(skb_put(skb, count), data, count); |
| 2151 | data += count; |
| 2152 | } |
| 2153 | |
| 2154 | len -= skb->len; |
| 2155 | |
| 2156 | /* Continuation fragments (no L2CAP header) */ |
| 2157 | frag = &skb_shinfo(skb)->frag_list; |
| 2158 | while (len) { |
| 2159 | count = min_t(unsigned int, conn->mtu, len); |
| 2160 | |
| 2161 | *frag = bt_skb_alloc(count, GFP_ATOMIC); |
| 2162 | if (!*frag) |
| 2163 | goto fail; |
| 2164 | |
| 2165 | memcpy(skb_put(*frag, count), data, count); |
| 2166 | |
| 2167 | len -= count; |
| 2168 | data += count; |
| 2169 | |
| 2170 | frag = &(*frag)->next; |
| 2171 | } |
| 2172 | |
| 2173 | return skb; |
| 2174 | |
| 2175 | fail: |
| 2176 | kfree_skb(skb); |
| 2177 | return NULL; |
| 2178 | } |
| 2179 | |
| 2180 | static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) |
| 2181 | { |
| 2182 | struct l2cap_conf_opt *opt = *ptr; |
| 2183 | int len; |
| 2184 | |
| 2185 | len = L2CAP_CONF_OPT_SIZE + opt->len; |
| 2186 | *ptr += len; |
| 2187 | |
| 2188 | *type = opt->type; |
| 2189 | *olen = opt->len; |
| 2190 | |
| 2191 | switch (opt->len) { |
| 2192 | case 1: |
| 2193 | *val = *((u8 *) opt->val); |
| 2194 | break; |
| 2195 | |
| 2196 | case 2: |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 2197 | *val = __le16_to_cpu(*((__le16 *) opt->val)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2198 | break; |
| 2199 | |
| 2200 | case 4: |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 2201 | *val = __le32_to_cpu(*((__le32 *) opt->val)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2202 | break; |
| 2203 | |
| 2204 | default: |
| 2205 | *val = (unsigned long) opt->val; |
| 2206 | break; |
| 2207 | } |
| 2208 | |
| 2209 | BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val); |
| 2210 | return len; |
| 2211 | } |
| 2212 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2213 | static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) |
| 2214 | { |
| 2215 | struct l2cap_conf_opt *opt = *ptr; |
| 2216 | |
| 2217 | BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val); |
| 2218 | |
| 2219 | opt->type = type; |
| 2220 | opt->len = len; |
| 2221 | |
| 2222 | switch (len) { |
| 2223 | case 1: |
| 2224 | *((u8 *) opt->val) = val; |
| 2225 | break; |
| 2226 | |
| 2227 | case 2: |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 2228 | *((__le16 *) opt->val) = cpu_to_le16(val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2229 | break; |
| 2230 | |
| 2231 | case 4: |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 2232 | *((__le32 *) opt->val) = cpu_to_le32(val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2233 | break; |
| 2234 | |
| 2235 | default: |
| 2236 | memcpy(opt->val, (void *) val, len); |
| 2237 | break; |
| 2238 | } |
| 2239 | |
| 2240 | *ptr += L2CAP_CONF_OPT_SIZE + len; |
| 2241 | } |
| 2242 | |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2243 | static void l2cap_ack_timeout(unsigned long arg) |
| 2244 | { |
| 2245 | struct sock *sk = (void *) arg; |
| 2246 | |
| 2247 | bh_lock_sock(sk); |
| 2248 | l2cap_send_ack(l2cap_pi(sk)); |
| 2249 | bh_unlock_sock(sk); |
| 2250 | } |
| 2251 | |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2252 | static inline void l2cap_ertm_init(struct sock *sk) |
| 2253 | { |
| 2254 | l2cap_pi(sk)->expected_ack_seq = 0; |
| 2255 | l2cap_pi(sk)->unacked_frames = 0; |
| 2256 | l2cap_pi(sk)->buffer_seq = 0; |
| 2257 | l2cap_pi(sk)->num_to_ack = 0; |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 2258 | l2cap_pi(sk)->frames_sent = 0; |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2259 | |
| 2260 | setup_timer(&l2cap_pi(sk)->retrans_timer, |
| 2261 | l2cap_retrans_timeout, (unsigned long) sk); |
| 2262 | setup_timer(&l2cap_pi(sk)->monitor_timer, |
| 2263 | l2cap_monitor_timeout, (unsigned long) sk); |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2264 | setup_timer(&l2cap_pi(sk)->ack_timer, |
| 2265 | l2cap_ack_timeout, (unsigned long) sk); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2266 | |
| 2267 | __skb_queue_head_init(SREJ_QUEUE(sk)); |
| 2268 | } |
| 2269 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2270 | static int l2cap_mode_supported(__u8 mode, __u32 feat_mask) |
| 2271 | { |
| 2272 | u32 local_feat_mask = l2cap_feat_mask; |
| 2273 | if (enable_ertm) |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 2274 | local_feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2275 | |
| 2276 | switch (mode) { |
| 2277 | case L2CAP_MODE_ERTM: |
| 2278 | return L2CAP_FEAT_ERTM & feat_mask & local_feat_mask; |
| 2279 | case L2CAP_MODE_STREAMING: |
| 2280 | return L2CAP_FEAT_STREAMING & feat_mask & local_feat_mask; |
| 2281 | default: |
| 2282 | return 0x00; |
| 2283 | } |
| 2284 | } |
| 2285 | |
| 2286 | static inline __u8 l2cap_select_mode(__u8 mode, __u16 remote_feat_mask) |
| 2287 | { |
| 2288 | switch (mode) { |
| 2289 | case L2CAP_MODE_STREAMING: |
| 2290 | case L2CAP_MODE_ERTM: |
| 2291 | if (l2cap_mode_supported(mode, remote_feat_mask)) |
| 2292 | return mode; |
| 2293 | /* fall through */ |
| 2294 | default: |
| 2295 | return L2CAP_MODE_BASIC; |
| 2296 | } |
| 2297 | } |
| 2298 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2299 | static int l2cap_build_conf_req(struct sock *sk, void *data) |
| 2300 | { |
| 2301 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 2302 | struct l2cap_conf_req *req = data; |
Gustavo F. Padovan | a0e55a3 | 2009-09-29 01:42:23 -0300 | [diff] [blame] | 2303 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2304 | void *ptr = req->data; |
| 2305 | |
| 2306 | BT_DBG("sk %p", sk); |
| 2307 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2308 | if (pi->num_conf_req || pi->num_conf_rsp) |
| 2309 | goto done; |
| 2310 | |
| 2311 | switch (pi->mode) { |
| 2312 | case L2CAP_MODE_STREAMING: |
| 2313 | case L2CAP_MODE_ERTM: |
| 2314 | pi->conf_state |= L2CAP_CONF_STATE2_DEVICE; |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 2315 | if (!l2cap_mode_supported(pi->mode, pi->conn->feat_mask)) |
| 2316 | l2cap_send_disconn_req(pi->conn, sk); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2317 | break; |
| 2318 | default: |
| 2319 | pi->mode = l2cap_select_mode(rfc.mode, pi->conn->feat_mask); |
| 2320 | break; |
| 2321 | } |
| 2322 | |
| 2323 | done: |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 2324 | switch (pi->mode) { |
| 2325 | case L2CAP_MODE_BASIC: |
| 2326 | if (pi->imtu != L2CAP_DEFAULT_MTU) |
| 2327 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu); |
| 2328 | break; |
| 2329 | |
| 2330 | case L2CAP_MODE_ERTM: |
| 2331 | rfc.mode = L2CAP_MODE_ERTM; |
Gustavo F. Padovan | 14b5aa7 | 2010-05-01 16:15:40 -0300 | [diff] [blame^] | 2332 | rfc.txwin_size = pi->tx_win; |
Marcel Holtmann | 5fbcd3d | 2009-10-05 11:35:43 +0200 | [diff] [blame] | 2333 | rfc.max_transmit = max_transmit; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2334 | rfc.retrans_timeout = 0; |
| 2335 | rfc.monitor_timeout = 0; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2336 | 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] | 2337 | if (L2CAP_DEFAULT_MAX_PDU_SIZE > pi->conn->mtu - 10) |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2338 | rfc.max_pdu_size = cpu_to_le16(pi->conn->mtu - 10); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2339 | |
| 2340 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2341 | sizeof(rfc), (unsigned long) &rfc); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2342 | |
| 2343 | if (!(pi->conn->feat_mask & L2CAP_FEAT_FCS)) |
| 2344 | break; |
| 2345 | |
| 2346 | if (pi->fcs == L2CAP_FCS_NONE || |
| 2347 | pi->conf_state & L2CAP_CONF_NO_FCS_RECV) { |
| 2348 | pi->fcs = L2CAP_FCS_NONE; |
| 2349 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, pi->fcs); |
| 2350 | } |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2351 | break; |
| 2352 | |
| 2353 | case L2CAP_MODE_STREAMING: |
| 2354 | rfc.mode = L2CAP_MODE_STREAMING; |
| 2355 | rfc.txwin_size = 0; |
| 2356 | rfc.max_transmit = 0; |
| 2357 | rfc.retrans_timeout = 0; |
| 2358 | rfc.monitor_timeout = 0; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2359 | 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] | 2360 | if (L2CAP_DEFAULT_MAX_PDU_SIZE > pi->conn->mtu - 10) |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2361 | rfc.max_pdu_size = cpu_to_le16(pi->conn->mtu - 10); |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 2362 | |
| 2363 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2364 | sizeof(rfc), (unsigned long) &rfc); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2365 | |
| 2366 | if (!(pi->conn->feat_mask & L2CAP_FEAT_FCS)) |
| 2367 | break; |
| 2368 | |
| 2369 | if (pi->fcs == L2CAP_FCS_NONE || |
| 2370 | pi->conf_state & L2CAP_CONF_NO_FCS_RECV) { |
| 2371 | pi->fcs = L2CAP_FCS_NONE; |
| 2372 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, pi->fcs); |
| 2373 | } |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 2374 | break; |
| 2375 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2376 | |
| 2377 | /* FIXME: Need actual value of the flush timeout */ |
| 2378 | //if (flush_to != L2CAP_DEFAULT_FLUSH_TO) |
| 2379 | // l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, 2, pi->flush_to); |
| 2380 | |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2381 | req->dcid = cpu_to_le16(pi->dcid); |
| 2382 | req->flags = cpu_to_le16(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2383 | |
| 2384 | return ptr - data; |
| 2385 | } |
| 2386 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2387 | static int l2cap_parse_conf_req(struct sock *sk, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2388 | { |
| 2389 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2390 | struct l2cap_conf_rsp *rsp = data; |
| 2391 | void *ptr = rsp->data; |
| 2392 | void *req = pi->conf_req; |
| 2393 | int len = pi->conf_len; |
| 2394 | int type, hint, olen; |
| 2395 | unsigned long val; |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2396 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 2397 | u16 mtu = L2CAP_DEFAULT_MTU; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2398 | u16 result = L2CAP_CONF_SUCCESS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2399 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2400 | BT_DBG("sk %p", sk); |
Marcel Holtmann | 820ae1b | 2006-11-18 22:15:00 +0100 | [diff] [blame] | 2401 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2402 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 2403 | len -= l2cap_get_conf_opt(&req, &type, &olen, &val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2404 | |
Gustavo F. Padovan | 589d274 | 2009-04-20 01:31:07 -0300 | [diff] [blame] | 2405 | hint = type & L2CAP_CONF_HINT; |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 2406 | type &= L2CAP_CONF_MASK; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2407 | |
| 2408 | switch (type) { |
| 2409 | case L2CAP_CONF_MTU: |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 2410 | mtu = val; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2411 | break; |
| 2412 | |
| 2413 | case L2CAP_CONF_FLUSH_TO: |
| 2414 | pi->flush_to = val; |
| 2415 | break; |
| 2416 | |
| 2417 | case L2CAP_CONF_QOS: |
| 2418 | break; |
| 2419 | |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2420 | case L2CAP_CONF_RFC: |
| 2421 | if (olen == sizeof(rfc)) |
| 2422 | memcpy(&rfc, (void *) val, olen); |
| 2423 | break; |
| 2424 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2425 | case L2CAP_CONF_FCS: |
| 2426 | if (val == L2CAP_FCS_NONE) |
| 2427 | pi->conf_state |= L2CAP_CONF_NO_FCS_RECV; |
| 2428 | |
| 2429 | break; |
| 2430 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2431 | default: |
| 2432 | if (hint) |
| 2433 | break; |
| 2434 | |
| 2435 | result = L2CAP_CONF_UNKNOWN; |
| 2436 | *((u8 *) ptr++) = type; |
| 2437 | break; |
| 2438 | } |
| 2439 | } |
| 2440 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2441 | if (pi->num_conf_rsp || pi->num_conf_req) |
| 2442 | goto done; |
| 2443 | |
| 2444 | switch (pi->mode) { |
| 2445 | case L2CAP_MODE_STREAMING: |
| 2446 | case L2CAP_MODE_ERTM: |
| 2447 | pi->conf_state |= L2CAP_CONF_STATE2_DEVICE; |
| 2448 | if (!l2cap_mode_supported(pi->mode, pi->conn->feat_mask)) |
| 2449 | return -ECONNREFUSED; |
| 2450 | break; |
| 2451 | default: |
| 2452 | pi->mode = l2cap_select_mode(rfc.mode, pi->conn->feat_mask); |
| 2453 | break; |
| 2454 | } |
| 2455 | |
| 2456 | done: |
| 2457 | if (pi->mode != rfc.mode) { |
| 2458 | result = L2CAP_CONF_UNACCEPT; |
| 2459 | rfc.mode = pi->mode; |
| 2460 | |
| 2461 | if (pi->num_conf_rsp == 1) |
| 2462 | return -ECONNREFUSED; |
| 2463 | |
| 2464 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2465 | sizeof(rfc), (unsigned long) &rfc); |
| 2466 | } |
| 2467 | |
| 2468 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2469 | if (result == L2CAP_CONF_SUCCESS) { |
| 2470 | /* Configure output options and let the other side know |
| 2471 | * which ones we don't like. */ |
| 2472 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2473 | if (mtu < L2CAP_DEFAULT_MIN_MTU) |
| 2474 | result = L2CAP_CONF_UNACCEPT; |
| 2475 | else { |
| 2476 | pi->omtu = mtu; |
| 2477 | pi->conf_state |= L2CAP_CONF_MTU_DONE; |
| 2478 | } |
| 2479 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2480 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2481 | switch (rfc.mode) { |
| 2482 | case L2CAP_MODE_BASIC: |
| 2483 | pi->fcs = L2CAP_FCS_NONE; |
| 2484 | pi->conf_state |= L2CAP_CONF_MODE_DONE; |
| 2485 | break; |
| 2486 | |
| 2487 | case L2CAP_MODE_ERTM: |
| 2488 | pi->remote_tx_win = rfc.txwin_size; |
| 2489 | pi->remote_max_tx = rfc.max_transmit; |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2490 | if (rfc.max_pdu_size > pi->conn->mtu - 10) |
| 2491 | rfc.max_pdu_size = le16_to_cpu(pi->conn->mtu - 10); |
| 2492 | |
| 2493 | pi->remote_mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2494 | |
Gustavo F. Padovan | 10467e9 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2495 | rfc.retrans_timeout = |
| 2496 | le16_to_cpu(L2CAP_DEFAULT_RETRANS_TO); |
| 2497 | rfc.monitor_timeout = |
| 2498 | le16_to_cpu(L2CAP_DEFAULT_MONITOR_TO); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2499 | |
| 2500 | pi->conf_state |= L2CAP_CONF_MODE_DONE; |
Gustavo F. Padovan | 68ae663 | 2009-10-17 21:41:01 -0300 | [diff] [blame] | 2501 | |
| 2502 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2503 | sizeof(rfc), (unsigned long) &rfc); |
| 2504 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2505 | break; |
| 2506 | |
| 2507 | case L2CAP_MODE_STREAMING: |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2508 | if (rfc.max_pdu_size > pi->conn->mtu - 10) |
| 2509 | rfc.max_pdu_size = le16_to_cpu(pi->conn->mtu - 10); |
| 2510 | |
| 2511 | pi->remote_mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2512 | |
| 2513 | pi->conf_state |= L2CAP_CONF_MODE_DONE; |
Gustavo F. Padovan | 68ae663 | 2009-10-17 21:41:01 -0300 | [diff] [blame] | 2514 | |
| 2515 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2516 | sizeof(rfc), (unsigned long) &rfc); |
| 2517 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2518 | break; |
| 2519 | |
| 2520 | default: |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2521 | result = L2CAP_CONF_UNACCEPT; |
| 2522 | |
| 2523 | memset(&rfc, 0, sizeof(rfc)); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2524 | rfc.mode = pi->mode; |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2525 | } |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2526 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2527 | if (result == L2CAP_CONF_SUCCESS) |
| 2528 | pi->conf_state |= L2CAP_CONF_OUTPUT_DONE; |
| 2529 | } |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2530 | rsp->scid = cpu_to_le16(pi->dcid); |
| 2531 | rsp->result = cpu_to_le16(result); |
| 2532 | rsp->flags = cpu_to_le16(0x0000); |
| 2533 | |
| 2534 | return ptr - data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2535 | } |
| 2536 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2537 | static int l2cap_parse_conf_rsp(struct sock *sk, void *rsp, int len, void *data, u16 *result) |
| 2538 | { |
| 2539 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 2540 | struct l2cap_conf_req *req = data; |
| 2541 | void *ptr = req->data; |
| 2542 | int type, olen; |
| 2543 | unsigned long val; |
| 2544 | struct l2cap_conf_rfc rfc; |
| 2545 | |
| 2546 | BT_DBG("sk %p, rsp %p, len %d, req %p", sk, rsp, len, data); |
| 2547 | |
| 2548 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 2549 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); |
| 2550 | |
| 2551 | switch (type) { |
| 2552 | case L2CAP_CONF_MTU: |
| 2553 | if (val < L2CAP_DEFAULT_MIN_MTU) { |
| 2554 | *result = L2CAP_CONF_UNACCEPT; |
| 2555 | pi->omtu = L2CAP_DEFAULT_MIN_MTU; |
| 2556 | } else |
| 2557 | pi->omtu = val; |
| 2558 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); |
| 2559 | break; |
| 2560 | |
| 2561 | case L2CAP_CONF_FLUSH_TO: |
| 2562 | pi->flush_to = val; |
| 2563 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, |
| 2564 | 2, pi->flush_to); |
| 2565 | break; |
| 2566 | |
| 2567 | case L2CAP_CONF_RFC: |
| 2568 | if (olen == sizeof(rfc)) |
| 2569 | memcpy(&rfc, (void *)val, olen); |
| 2570 | |
| 2571 | if ((pi->conf_state & L2CAP_CONF_STATE2_DEVICE) && |
| 2572 | rfc.mode != pi->mode) |
| 2573 | return -ECONNREFUSED; |
| 2574 | |
| 2575 | pi->mode = rfc.mode; |
| 2576 | pi->fcs = 0; |
| 2577 | |
| 2578 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2579 | sizeof(rfc), (unsigned long) &rfc); |
| 2580 | break; |
| 2581 | } |
| 2582 | } |
| 2583 | |
| 2584 | if (*result == L2CAP_CONF_SUCCESS) { |
| 2585 | switch (rfc.mode) { |
| 2586 | case L2CAP_MODE_ERTM: |
| 2587 | pi->remote_tx_win = rfc.txwin_size; |
Gustavo F. Padovan | 10467e9 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2588 | pi->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); |
| 2589 | pi->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2590 | pi->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2591 | break; |
| 2592 | case L2CAP_MODE_STREAMING: |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2593 | pi->mps = le16_to_cpu(rfc.max_pdu_size); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2594 | } |
| 2595 | } |
| 2596 | |
| 2597 | req->dcid = cpu_to_le16(pi->dcid); |
| 2598 | req->flags = cpu_to_le16(0x0000); |
| 2599 | |
| 2600 | return ptr - data; |
| 2601 | } |
| 2602 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2603 | 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] | 2604 | { |
| 2605 | struct l2cap_conf_rsp *rsp = data; |
| 2606 | void *ptr = rsp->data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2607 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2608 | BT_DBG("sk %p", sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2609 | |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2610 | rsp->scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2611 | rsp->result = cpu_to_le16(result); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2612 | rsp->flags = cpu_to_le16(flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2613 | |
| 2614 | return ptr - data; |
| 2615 | } |
| 2616 | |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2617 | static void l2cap_conf_rfc_get(struct sock *sk, void *rsp, int len) |
| 2618 | { |
| 2619 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 2620 | int type, olen; |
| 2621 | unsigned long val; |
| 2622 | struct l2cap_conf_rfc rfc; |
| 2623 | |
| 2624 | BT_DBG("sk %p, rsp %p, len %d", sk, rsp, len); |
| 2625 | |
| 2626 | if ((pi->mode != L2CAP_MODE_ERTM) && (pi->mode != L2CAP_MODE_STREAMING)) |
| 2627 | return; |
| 2628 | |
| 2629 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 2630 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); |
| 2631 | |
| 2632 | switch (type) { |
| 2633 | case L2CAP_CONF_RFC: |
| 2634 | if (olen == sizeof(rfc)) |
| 2635 | memcpy(&rfc, (void *)val, olen); |
| 2636 | goto done; |
| 2637 | } |
| 2638 | } |
| 2639 | |
| 2640 | done: |
| 2641 | switch (rfc.mode) { |
| 2642 | case L2CAP_MODE_ERTM: |
| 2643 | pi->remote_tx_win = rfc.txwin_size; |
Gustavo F. Padovan | 10467e9 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 2644 | pi->retrans_timeout = le16_to_cpu(rfc.retrans_timeout); |
| 2645 | pi->monitor_timeout = le16_to_cpu(rfc.monitor_timeout); |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2646 | pi->mps = le16_to_cpu(rfc.max_pdu_size); |
| 2647 | break; |
| 2648 | case L2CAP_MODE_STREAMING: |
| 2649 | pi->mps = le16_to_cpu(rfc.max_pdu_size); |
| 2650 | } |
| 2651 | } |
| 2652 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2653 | static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2654 | { |
| 2655 | struct l2cap_cmd_rej *rej = (struct l2cap_cmd_rej *) data; |
| 2656 | |
| 2657 | if (rej->reason != 0x0000) |
| 2658 | return 0; |
| 2659 | |
| 2660 | if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) && |
| 2661 | cmd->ident == conn->info_ident) { |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2662 | del_timer(&conn->info_timer); |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2663 | |
| 2664 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 2665 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2666 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2667 | l2cap_conn_start(conn); |
| 2668 | } |
| 2669 | |
| 2670 | return 0; |
| 2671 | } |
| 2672 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2673 | static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2674 | { |
| 2675 | struct l2cap_chan_list *list = &conn->chan_list; |
| 2676 | struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; |
| 2677 | struct l2cap_conn_rsp rsp; |
| 2678 | struct sock *sk, *parent; |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2679 | int result, status = L2CAP_CS_NO_INFO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2680 | |
| 2681 | u16 dcid = 0, scid = __le16_to_cpu(req->scid); |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2682 | __le16 psm = req->psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2683 | |
| 2684 | BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid); |
| 2685 | |
| 2686 | /* Check if we have socket listening on psm */ |
| 2687 | parent = l2cap_get_sock_by_psm(BT_LISTEN, psm, conn->src); |
| 2688 | if (!parent) { |
| 2689 | result = L2CAP_CR_BAD_PSM; |
| 2690 | goto sendresp; |
| 2691 | } |
| 2692 | |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2693 | /* Check if the ACL is secure enough (if not SDP) */ |
| 2694 | if (psm != cpu_to_le16(0x0001) && |
| 2695 | !hci_conn_check_link_mode(conn->hcon)) { |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 2696 | conn->disc_reason = 0x05; |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2697 | result = L2CAP_CR_SEC_BLOCK; |
| 2698 | goto response; |
| 2699 | } |
| 2700 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2701 | result = L2CAP_CR_NO_MEM; |
| 2702 | |
| 2703 | /* Check for backlog size */ |
| 2704 | if (sk_acceptq_is_full(parent)) { |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 2705 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2706 | goto response; |
| 2707 | } |
| 2708 | |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 2709 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2710 | if (!sk) |
| 2711 | goto response; |
| 2712 | |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 2713 | write_lock_bh(&list->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2714 | |
| 2715 | /* Check if we already have channel with that dcid */ |
| 2716 | if (__l2cap_get_chan_by_dcid(list, scid)) { |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 2717 | write_unlock_bh(&list->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2718 | sock_set_flag(sk, SOCK_ZAPPED); |
| 2719 | l2cap_sock_kill(sk); |
| 2720 | goto response; |
| 2721 | } |
| 2722 | |
| 2723 | hci_conn_hold(conn->hcon); |
| 2724 | |
| 2725 | l2cap_sock_init(sk, parent); |
| 2726 | bacpy(&bt_sk(sk)->src, conn->src); |
| 2727 | bacpy(&bt_sk(sk)->dst, conn->dst); |
| 2728 | l2cap_pi(sk)->psm = psm; |
| 2729 | l2cap_pi(sk)->dcid = scid; |
| 2730 | |
| 2731 | __l2cap_chan_add(conn, sk, parent); |
| 2732 | dcid = l2cap_pi(sk)->scid; |
| 2733 | |
| 2734 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); |
| 2735 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2736 | l2cap_pi(sk)->ident = cmd->ident; |
| 2737 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2738 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 2739 | if (l2cap_check_security(sk)) { |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 2740 | if (bt_sk(sk)->defer_setup) { |
| 2741 | sk->sk_state = BT_CONNECT2; |
| 2742 | result = L2CAP_CR_PEND; |
| 2743 | status = L2CAP_CS_AUTHOR_PEND; |
| 2744 | parent->sk_data_ready(parent, 0); |
| 2745 | } else { |
| 2746 | sk->sk_state = BT_CONFIG; |
| 2747 | result = L2CAP_CR_SUCCESS; |
| 2748 | status = L2CAP_CS_NO_INFO; |
| 2749 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2750 | } else { |
| 2751 | sk->sk_state = BT_CONNECT2; |
| 2752 | result = L2CAP_CR_PEND; |
| 2753 | status = L2CAP_CS_AUTHEN_PEND; |
| 2754 | } |
| 2755 | } else { |
| 2756 | sk->sk_state = BT_CONNECT2; |
| 2757 | result = L2CAP_CR_PEND; |
| 2758 | status = L2CAP_CS_NO_INFO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2759 | } |
| 2760 | |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 2761 | write_unlock_bh(&list->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2762 | |
| 2763 | response: |
| 2764 | bh_unlock_sock(parent); |
| 2765 | |
| 2766 | sendresp: |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2767 | rsp.scid = cpu_to_le16(scid); |
| 2768 | rsp.dcid = cpu_to_le16(dcid); |
| 2769 | rsp.result = cpu_to_le16(result); |
| 2770 | rsp.status = cpu_to_le16(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2771 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2772 | |
| 2773 | if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) { |
| 2774 | struct l2cap_info_req info; |
| 2775 | info.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 2776 | |
| 2777 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; |
| 2778 | conn->info_ident = l2cap_get_ident(conn); |
| 2779 | |
| 2780 | mod_timer(&conn->info_timer, jiffies + |
| 2781 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); |
| 2782 | |
| 2783 | l2cap_send_cmd(conn, conn->info_ident, |
| 2784 | L2CAP_INFO_REQ, sizeof(info), &info); |
| 2785 | } |
| 2786 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2787 | return 0; |
| 2788 | } |
| 2789 | |
| 2790 | static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2791 | { |
| 2792 | struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; |
| 2793 | u16 scid, dcid, result, status; |
| 2794 | struct sock *sk; |
| 2795 | u8 req[128]; |
| 2796 | |
| 2797 | scid = __le16_to_cpu(rsp->scid); |
| 2798 | dcid = __le16_to_cpu(rsp->dcid); |
| 2799 | result = __le16_to_cpu(rsp->result); |
| 2800 | status = __le16_to_cpu(rsp->status); |
| 2801 | |
| 2802 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid, scid, result, status); |
| 2803 | |
| 2804 | if (scid) { |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2805 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
| 2806 | if (!sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2807 | return 0; |
| 2808 | } else { |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2809 | sk = l2cap_get_chan_by_ident(&conn->chan_list, cmd->ident); |
| 2810 | if (!sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2811 | return 0; |
| 2812 | } |
| 2813 | |
| 2814 | switch (result) { |
| 2815 | case L2CAP_CR_SUCCESS: |
| 2816 | sk->sk_state = BT_CONFIG; |
| 2817 | l2cap_pi(sk)->ident = 0; |
| 2818 | l2cap_pi(sk)->dcid = dcid; |
| 2819 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; |
| 2820 | |
Marcel Holtmann | 6a8d301 | 2009-02-06 23:56:36 +0100 | [diff] [blame] | 2821 | l2cap_pi(sk)->conf_state &= ~L2CAP_CONF_CONNECT_PEND; |
| 2822 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2823 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
| 2824 | l2cap_build_conf_req(sk, req), req); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2825 | l2cap_pi(sk)->num_conf_req++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2826 | break; |
| 2827 | |
| 2828 | case L2CAP_CR_PEND: |
Marcel Holtmann | 6a8d301 | 2009-02-06 23:56:36 +0100 | [diff] [blame] | 2829 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2830 | break; |
| 2831 | |
| 2832 | default: |
| 2833 | l2cap_chan_del(sk, ECONNREFUSED); |
| 2834 | break; |
| 2835 | } |
| 2836 | |
| 2837 | bh_unlock_sock(sk); |
| 2838 | return 0; |
| 2839 | } |
| 2840 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 2841 | 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] | 2842 | { |
| 2843 | struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; |
| 2844 | u16 dcid, flags; |
| 2845 | u8 rsp[64]; |
| 2846 | struct sock *sk; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2847 | int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2848 | |
| 2849 | dcid = __le16_to_cpu(req->dcid); |
| 2850 | flags = __le16_to_cpu(req->flags); |
| 2851 | |
| 2852 | BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); |
| 2853 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2854 | sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid); |
| 2855 | if (!sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2856 | return -ENOENT; |
| 2857 | |
Marcel Holtmann | 354f60a | 2006-11-18 22:15:20 +0100 | [diff] [blame] | 2858 | if (sk->sk_state == BT_DISCONN) |
| 2859 | goto unlock; |
| 2860 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2861 | /* Reject if config buffer is too small. */ |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 2862 | len = cmd_len - sizeof(*req); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2863 | if (l2cap_pi(sk)->conf_len + len > sizeof(l2cap_pi(sk)->conf_req)) { |
| 2864 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
| 2865 | l2cap_build_conf_rsp(sk, rsp, |
| 2866 | L2CAP_CONF_REJECT, flags), rsp); |
| 2867 | goto unlock; |
| 2868 | } |
| 2869 | |
| 2870 | /* Store config. */ |
| 2871 | memcpy(l2cap_pi(sk)->conf_req + l2cap_pi(sk)->conf_len, req->data, len); |
| 2872 | l2cap_pi(sk)->conf_len += len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2873 | |
| 2874 | if (flags & 0x0001) { |
| 2875 | /* Incomplete config. Send empty response. */ |
| 2876 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2877 | l2cap_build_conf_rsp(sk, rsp, |
| 2878 | L2CAP_CONF_SUCCESS, 0x0001), rsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2879 | goto unlock; |
| 2880 | } |
| 2881 | |
| 2882 | /* Complete config. */ |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2883 | len = l2cap_parse_conf_req(sk, rsp); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2884 | if (len < 0) { |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 2885 | l2cap_send_disconn_req(conn, sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2886 | goto unlock; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2887 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2888 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2889 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2890 | l2cap_pi(sk)->num_conf_rsp++; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2891 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2892 | /* Reset config buffer. */ |
| 2893 | l2cap_pi(sk)->conf_len = 0; |
| 2894 | |
Marcel Holtmann | 876d948 | 2007-10-20 13:35:42 +0200 | [diff] [blame] | 2895 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE)) |
| 2896 | goto unlock; |
| 2897 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2898 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_INPUT_DONE) { |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 2899 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_NO_FCS_RECV) || |
| 2900 | l2cap_pi(sk)->fcs != L2CAP_FCS_NONE) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2901 | l2cap_pi(sk)->fcs = L2CAP_FCS_CRC16; |
| 2902 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2903 | sk->sk_state = BT_CONNECTED; |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2904 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 2905 | l2cap_pi(sk)->next_tx_seq = 0; |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2906 | l2cap_pi(sk)->expected_tx_seq = 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 2907 | __skb_queue_head_init(TX_QUEUE(sk)); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2908 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) |
| 2909 | l2cap_ertm_init(sk); |
| 2910 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2911 | l2cap_chan_ready(sk); |
Marcel Holtmann | 876d948 | 2007-10-20 13:35:42 +0200 | [diff] [blame] | 2912 | goto unlock; |
| 2913 | } |
| 2914 | |
| 2915 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT)) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2916 | u8 buf[64]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2917 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2918 | l2cap_build_conf_req(sk, buf), buf); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2919 | l2cap_pi(sk)->num_conf_req++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2920 | } |
| 2921 | |
| 2922 | unlock: |
| 2923 | bh_unlock_sock(sk); |
| 2924 | return 0; |
| 2925 | } |
| 2926 | |
| 2927 | static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2928 | { |
| 2929 | struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; |
| 2930 | u16 scid, flags, result; |
| 2931 | struct sock *sk; |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2932 | int len = cmd->len - sizeof(*rsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2933 | |
| 2934 | scid = __le16_to_cpu(rsp->scid); |
| 2935 | flags = __le16_to_cpu(rsp->flags); |
| 2936 | result = __le16_to_cpu(rsp->result); |
| 2937 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2938 | BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x", |
| 2939 | scid, flags, result); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2940 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2941 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
| 2942 | if (!sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2943 | return 0; |
| 2944 | |
| 2945 | switch (result) { |
| 2946 | case L2CAP_CONF_SUCCESS: |
Gustavo F. Padovan | 7b1c004 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 2947 | l2cap_conf_rfc_get(sk, rsp->data, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2948 | break; |
| 2949 | |
| 2950 | case L2CAP_CONF_UNACCEPT: |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2951 | 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] | 2952 | char req[64]; |
| 2953 | |
Andrei Emeltchenko | c2c77ec | 2010-03-19 10:26:28 +0200 | [diff] [blame] | 2954 | if (len > sizeof(req) - sizeof(struct l2cap_conf_req)) { |
| 2955 | l2cap_send_disconn_req(conn, sk); |
| 2956 | goto done; |
| 2957 | } |
| 2958 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2959 | /* throw out any old stored conf requests */ |
| 2960 | result = L2CAP_CONF_SUCCESS; |
| 2961 | len = l2cap_parse_conf_rsp(sk, rsp->data, |
| 2962 | len, req, &result); |
| 2963 | if (len < 0) { |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 2964 | l2cap_send_disconn_req(conn, sk); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2965 | goto done; |
| 2966 | } |
| 2967 | |
| 2968 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
| 2969 | L2CAP_CONF_REQ, len, req); |
| 2970 | l2cap_pi(sk)->num_conf_req++; |
| 2971 | if (result != L2CAP_CONF_SUCCESS) |
| 2972 | goto done; |
| 2973 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2974 | } |
| 2975 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 2976 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2977 | sk->sk_state = BT_DISCONN; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 2978 | sk->sk_err = ECONNRESET; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2979 | l2cap_sock_set_timer(sk, HZ * 5); |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 2980 | l2cap_send_disconn_req(conn, sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2981 | goto done; |
| 2982 | } |
| 2983 | |
| 2984 | if (flags & 0x01) |
| 2985 | goto done; |
| 2986 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2987 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_INPUT_DONE; |
| 2988 | |
| 2989 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE) { |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 2990 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_NO_FCS_RECV) || |
| 2991 | l2cap_pi(sk)->fcs != L2CAP_FCS_NONE) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2992 | l2cap_pi(sk)->fcs = L2CAP_FCS_CRC16; |
| 2993 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2994 | sk->sk_state = BT_CONNECTED; |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2995 | l2cap_pi(sk)->next_tx_seq = 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 2996 | l2cap_pi(sk)->expected_tx_seq = 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 2997 | __skb_queue_head_init(TX_QUEUE(sk)); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 2998 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) |
| 2999 | l2cap_ertm_init(sk); |
| 3000 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3001 | l2cap_chan_ready(sk); |
| 3002 | } |
| 3003 | |
| 3004 | done: |
| 3005 | bh_unlock_sock(sk); |
| 3006 | return 0; |
| 3007 | } |
| 3008 | |
| 3009 | static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3010 | { |
| 3011 | struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; |
| 3012 | struct l2cap_disconn_rsp rsp; |
| 3013 | u16 dcid, scid; |
| 3014 | struct sock *sk; |
| 3015 | |
| 3016 | scid = __le16_to_cpu(req->scid); |
| 3017 | dcid = __le16_to_cpu(req->dcid); |
| 3018 | |
| 3019 | BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); |
| 3020 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 3021 | sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid); |
| 3022 | if (!sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3023 | return 0; |
| 3024 | |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 3025 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 3026 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3027 | l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); |
| 3028 | |
| 3029 | sk->sk_shutdown = SHUTDOWN_MASK; |
| 3030 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3031 | skb_queue_purge(TX_QUEUE(sk)); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 3032 | |
| 3033 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) { |
| 3034 | skb_queue_purge(SREJ_QUEUE(sk)); |
| 3035 | del_timer(&l2cap_pi(sk)->retrans_timer); |
| 3036 | del_timer(&l2cap_pi(sk)->monitor_timer); |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3037 | del_timer(&l2cap_pi(sk)->ack_timer); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 3038 | } |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3039 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3040 | l2cap_chan_del(sk, ECONNRESET); |
| 3041 | bh_unlock_sock(sk); |
| 3042 | |
| 3043 | l2cap_sock_kill(sk); |
| 3044 | return 0; |
| 3045 | } |
| 3046 | |
| 3047 | static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3048 | { |
| 3049 | struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; |
| 3050 | u16 dcid, scid; |
| 3051 | struct sock *sk; |
| 3052 | |
| 3053 | scid = __le16_to_cpu(rsp->scid); |
| 3054 | dcid = __le16_to_cpu(rsp->dcid); |
| 3055 | |
| 3056 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); |
| 3057 | |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 3058 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
| 3059 | if (!sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3060 | return 0; |
| 3061 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3062 | skb_queue_purge(TX_QUEUE(sk)); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 3063 | |
| 3064 | if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) { |
| 3065 | skb_queue_purge(SREJ_QUEUE(sk)); |
| 3066 | del_timer(&l2cap_pi(sk)->retrans_timer); |
| 3067 | del_timer(&l2cap_pi(sk)->monitor_timer); |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3068 | del_timer(&l2cap_pi(sk)->ack_timer); |
Gustavo F. Padovan | 0565c1c | 2009-10-03 02:34:36 -0300 | [diff] [blame] | 3069 | } |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3070 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3071 | l2cap_chan_del(sk, 0); |
| 3072 | bh_unlock_sock(sk); |
| 3073 | |
| 3074 | l2cap_sock_kill(sk); |
| 3075 | return 0; |
| 3076 | } |
| 3077 | |
| 3078 | static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3079 | { |
| 3080 | struct l2cap_info_req *req = (struct l2cap_info_req *) data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3081 | u16 type; |
| 3082 | |
| 3083 | type = __le16_to_cpu(req->type); |
| 3084 | |
| 3085 | BT_DBG("type 0x%4.4x", type); |
| 3086 | |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 3087 | if (type == L2CAP_IT_FEAT_MASK) { |
| 3088 | u8 buf[8]; |
Marcel Holtmann | 44dd46d | 2009-05-02 19:09:01 -0700 | [diff] [blame] | 3089 | u32 feat_mask = l2cap_feat_mask; |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 3090 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
| 3091 | rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 3092 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); |
Marcel Holtmann | 44dd46d | 2009-05-02 19:09:01 -0700 | [diff] [blame] | 3093 | if (enable_ertm) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3094 | feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING |
| 3095 | | L2CAP_FEAT_FCS; |
Gustavo F. Padovan | 1b7bf4e | 2009-08-24 00:45:20 -0300 | [diff] [blame] | 3096 | put_unaligned_le32(feat_mask, rsp->data); |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 3097 | l2cap_send_cmd(conn, cmd->ident, |
| 3098 | L2CAP_INFO_RSP, sizeof(buf), buf); |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 3099 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
| 3100 | u8 buf[12]; |
| 3101 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
| 3102 | rsp->type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); |
| 3103 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); |
| 3104 | memcpy(buf + 4, l2cap_fixed_chan, 8); |
| 3105 | l2cap_send_cmd(conn, cmd->ident, |
| 3106 | L2CAP_INFO_RSP, sizeof(buf), buf); |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 3107 | } else { |
| 3108 | struct l2cap_info_rsp rsp; |
| 3109 | rsp.type = cpu_to_le16(type); |
| 3110 | rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP); |
| 3111 | l2cap_send_cmd(conn, cmd->ident, |
| 3112 | L2CAP_INFO_RSP, sizeof(rsp), &rsp); |
| 3113 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3114 | |
| 3115 | return 0; |
| 3116 | } |
| 3117 | |
| 3118 | static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 3119 | { |
| 3120 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; |
| 3121 | u16 type, result; |
| 3122 | |
| 3123 | type = __le16_to_cpu(rsp->type); |
| 3124 | result = __le16_to_cpu(rsp->result); |
| 3125 | |
| 3126 | BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); |
| 3127 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 3128 | del_timer(&conn->info_timer); |
| 3129 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 3130 | if (type == L2CAP_IT_FEAT_MASK) { |
Harvey Harrison | 8398531 | 2008-05-02 16:25:46 -0700 | [diff] [blame] | 3131 | conn->feat_mask = get_unaligned_le32(rsp->data); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 3132 | |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 3133 | if (conn->feat_mask & L2CAP_FEAT_FIXED_CHAN) { |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 3134 | struct l2cap_info_req req; |
| 3135 | req.type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); |
| 3136 | |
| 3137 | conn->info_ident = l2cap_get_ident(conn); |
| 3138 | |
| 3139 | l2cap_send_cmd(conn, conn->info_ident, |
| 3140 | L2CAP_INFO_REQ, sizeof(req), &req); |
| 3141 | } else { |
| 3142 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
| 3143 | conn->info_ident = 0; |
| 3144 | |
| 3145 | l2cap_conn_start(conn); |
| 3146 | } |
| 3147 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 3148 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 3149 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 3150 | |
| 3151 | l2cap_conn_start(conn); |
| 3152 | } |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 3153 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3154 | return 0; |
| 3155 | } |
| 3156 | |
| 3157 | static inline void l2cap_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb) |
| 3158 | { |
| 3159 | u8 *data = skb->data; |
| 3160 | int len = skb->len; |
| 3161 | struct l2cap_cmd_hdr cmd; |
| 3162 | int err = 0; |
| 3163 | |
| 3164 | l2cap_raw_recv(conn, skb); |
| 3165 | |
| 3166 | while (len >= L2CAP_CMD_HDR_SIZE) { |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3167 | u16 cmd_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3168 | memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); |
| 3169 | data += L2CAP_CMD_HDR_SIZE; |
| 3170 | len -= L2CAP_CMD_HDR_SIZE; |
| 3171 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3172 | cmd_len = le16_to_cpu(cmd.len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3173 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3174 | 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] | 3175 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3176 | if (cmd_len > len || !cmd.ident) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3177 | BT_DBG("corrupted command"); |
| 3178 | break; |
| 3179 | } |
| 3180 | |
| 3181 | switch (cmd.code) { |
| 3182 | case L2CAP_COMMAND_REJ: |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 3183 | l2cap_command_rej(conn, &cmd, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3184 | break; |
| 3185 | |
| 3186 | case L2CAP_CONN_REQ: |
| 3187 | err = l2cap_connect_req(conn, &cmd, data); |
| 3188 | break; |
| 3189 | |
| 3190 | case L2CAP_CONN_RSP: |
| 3191 | err = l2cap_connect_rsp(conn, &cmd, data); |
| 3192 | break; |
| 3193 | |
| 3194 | case L2CAP_CONF_REQ: |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3195 | err = l2cap_config_req(conn, &cmd, cmd_len, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3196 | break; |
| 3197 | |
| 3198 | case L2CAP_CONF_RSP: |
| 3199 | err = l2cap_config_rsp(conn, &cmd, data); |
| 3200 | break; |
| 3201 | |
| 3202 | case L2CAP_DISCONN_REQ: |
| 3203 | err = l2cap_disconnect_req(conn, &cmd, data); |
| 3204 | break; |
| 3205 | |
| 3206 | case L2CAP_DISCONN_RSP: |
| 3207 | err = l2cap_disconnect_rsp(conn, &cmd, data); |
| 3208 | break; |
| 3209 | |
| 3210 | case L2CAP_ECHO_REQ: |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3211 | l2cap_send_cmd(conn, cmd.ident, L2CAP_ECHO_RSP, cmd_len, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3212 | break; |
| 3213 | |
| 3214 | case L2CAP_ECHO_RSP: |
| 3215 | break; |
| 3216 | |
| 3217 | case L2CAP_INFO_REQ: |
| 3218 | err = l2cap_information_req(conn, &cmd, data); |
| 3219 | break; |
| 3220 | |
| 3221 | case L2CAP_INFO_RSP: |
| 3222 | err = l2cap_information_rsp(conn, &cmd, data); |
| 3223 | break; |
| 3224 | |
| 3225 | default: |
| 3226 | BT_ERR("Unknown signaling command 0x%2.2x", cmd.code); |
| 3227 | err = -EINVAL; |
| 3228 | break; |
| 3229 | } |
| 3230 | |
| 3231 | if (err) { |
| 3232 | struct l2cap_cmd_rej rej; |
| 3233 | BT_DBG("error %d", err); |
| 3234 | |
| 3235 | /* FIXME: Map err to a valid reason */ |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 3236 | rej.reason = cpu_to_le16(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3237 | l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); |
| 3238 | } |
| 3239 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3240 | data += cmd_len; |
| 3241 | len -= cmd_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3242 | } |
| 3243 | |
| 3244 | kfree_skb(skb); |
| 3245 | } |
| 3246 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3247 | static int l2cap_check_fcs(struct l2cap_pinfo *pi, struct sk_buff *skb) |
| 3248 | { |
| 3249 | u16 our_fcs, rcv_fcs; |
| 3250 | int hdr_size = L2CAP_HDR_SIZE + 2; |
| 3251 | |
| 3252 | if (pi->fcs == L2CAP_FCS_CRC16) { |
| 3253 | skb_trim(skb, skb->len - 2); |
| 3254 | rcv_fcs = get_unaligned_le16(skb->data + skb->len); |
| 3255 | our_fcs = crc16(0, skb->data - hdr_size, skb->len + hdr_size); |
| 3256 | |
| 3257 | if (our_fcs != rcv_fcs) |
| 3258 | return -EINVAL; |
| 3259 | } |
| 3260 | return 0; |
| 3261 | } |
| 3262 | |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3263 | static inline void l2cap_send_i_or_rr_or_rnr(struct sock *sk) |
| 3264 | { |
| 3265 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 3266 | u16 control = 0; |
| 3267 | |
| 3268 | pi->frames_sent = 0; |
| 3269 | pi->conn_state |= L2CAP_CONN_SEND_FBIT; |
| 3270 | |
| 3271 | control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
| 3272 | |
| 3273 | if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) { |
| 3274 | control |= L2CAP_SUPER_RCV_NOT_READY | L2CAP_CTRL_FINAL; |
| 3275 | l2cap_send_sframe(pi, control); |
| 3276 | pi->conn_state &= ~L2CAP_CONN_SEND_FBIT; |
| 3277 | } |
| 3278 | |
| 3279 | if (pi->conn_state & L2CAP_CONN_REMOTE_BUSY && pi->unacked_frames > 0) |
| 3280 | __mod_retrans_timer(); |
| 3281 | |
| 3282 | l2cap_ertm_send(sk); |
| 3283 | |
| 3284 | if (!(pi->conn_state & L2CAP_CONN_LOCAL_BUSY) && |
| 3285 | pi->frames_sent == 0) { |
| 3286 | control |= L2CAP_SUPER_RCV_READY; |
Gustavo F. Padovan | d5392c8 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3287 | l2cap_send_sframe(pi, control); |
| 3288 | } |
| 3289 | } |
| 3290 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3291 | static void l2cap_add_to_srej_queue(struct sock *sk, struct sk_buff *skb, u8 tx_seq, u8 sar) |
| 3292 | { |
| 3293 | struct sk_buff *next_skb; |
| 3294 | |
| 3295 | bt_cb(skb)->tx_seq = tx_seq; |
| 3296 | bt_cb(skb)->sar = sar; |
| 3297 | |
| 3298 | next_skb = skb_peek(SREJ_QUEUE(sk)); |
| 3299 | if (!next_skb) { |
| 3300 | __skb_queue_tail(SREJ_QUEUE(sk), skb); |
| 3301 | return; |
| 3302 | } |
| 3303 | |
| 3304 | do { |
| 3305 | if (bt_cb(next_skb)->tx_seq > tx_seq) { |
| 3306 | __skb_queue_before(SREJ_QUEUE(sk), next_skb, skb); |
| 3307 | return; |
| 3308 | } |
| 3309 | |
| 3310 | if (skb_queue_is_last(SREJ_QUEUE(sk), next_skb)) |
| 3311 | break; |
| 3312 | |
| 3313 | } while((next_skb = skb_queue_next(SREJ_QUEUE(sk), next_skb))); |
| 3314 | |
| 3315 | __skb_queue_tail(SREJ_QUEUE(sk), skb); |
| 3316 | } |
| 3317 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3318 | static int l2cap_sar_reassembly_sdu(struct sock *sk, struct sk_buff *skb, u16 control) |
| 3319 | { |
| 3320 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 3321 | struct sk_buff *_skb; |
| 3322 | int err = -EINVAL; |
| 3323 | |
| 3324 | switch (control & L2CAP_CTRL_SAR) { |
| 3325 | case L2CAP_SDU_UNSEGMENTED: |
| 3326 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) { |
| 3327 | kfree_skb(pi->sdu); |
| 3328 | break; |
| 3329 | } |
| 3330 | |
| 3331 | err = sock_queue_rcv_skb(sk, skb); |
| 3332 | if (!err) |
| 3333 | return 0; |
| 3334 | |
| 3335 | break; |
| 3336 | |
| 3337 | case L2CAP_SDU_START: |
| 3338 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) { |
| 3339 | kfree_skb(pi->sdu); |
| 3340 | break; |
| 3341 | } |
| 3342 | |
| 3343 | pi->sdu_len = get_unaligned_le16(skb->data); |
| 3344 | skb_pull(skb, 2); |
| 3345 | |
Gustavo F. Padovan | 052897c | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 3346 | if (pi->sdu_len > pi->imtu) { |
| 3347 | err = -EMSGSIZE; |
| 3348 | break; |
| 3349 | } |
| 3350 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3351 | pi->sdu = bt_skb_alloc(pi->sdu_len, GFP_ATOMIC); |
| 3352 | if (!pi->sdu) { |
| 3353 | err = -ENOMEM; |
| 3354 | break; |
| 3355 | } |
| 3356 | |
| 3357 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); |
| 3358 | |
| 3359 | pi->conn_state |= L2CAP_CONN_SAR_SDU; |
| 3360 | pi->partial_sdu_len = skb->len; |
| 3361 | err = 0; |
| 3362 | break; |
| 3363 | |
| 3364 | case L2CAP_SDU_CONTINUE: |
| 3365 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) |
| 3366 | break; |
| 3367 | |
| 3368 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); |
| 3369 | |
| 3370 | pi->partial_sdu_len += skb->len; |
| 3371 | if (pi->partial_sdu_len > pi->sdu_len) |
| 3372 | kfree_skb(pi->sdu); |
| 3373 | else |
| 3374 | err = 0; |
| 3375 | |
| 3376 | break; |
| 3377 | |
| 3378 | case L2CAP_SDU_END: |
| 3379 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) |
| 3380 | break; |
| 3381 | |
| 3382 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); |
| 3383 | |
| 3384 | pi->conn_state &= ~L2CAP_CONN_SAR_SDU; |
| 3385 | pi->partial_sdu_len += skb->len; |
| 3386 | |
Gustavo F. Padovan | 36f2fd5 | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3387 | if (pi->partial_sdu_len > pi->imtu) |
| 3388 | goto drop; |
| 3389 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3390 | if (pi->partial_sdu_len == pi->sdu_len) { |
| 3391 | _skb = skb_clone(pi->sdu, GFP_ATOMIC); |
| 3392 | err = sock_queue_rcv_skb(sk, _skb); |
| 3393 | if (err < 0) |
| 3394 | kfree_skb(_skb); |
| 3395 | } |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3396 | err = 0; |
| 3397 | |
Gustavo F. Padovan | 36f2fd5 | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3398 | drop: |
| 3399 | kfree_skb(pi->sdu); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3400 | break; |
| 3401 | } |
| 3402 | |
| 3403 | kfree_skb(skb); |
| 3404 | return err; |
| 3405 | } |
| 3406 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3407 | static void l2cap_check_srej_gap(struct sock *sk, u8 tx_seq) |
| 3408 | { |
| 3409 | struct sk_buff *skb; |
| 3410 | u16 control = 0; |
| 3411 | |
| 3412 | while((skb = skb_peek(SREJ_QUEUE(sk)))) { |
| 3413 | if (bt_cb(skb)->tx_seq != tx_seq) |
| 3414 | break; |
| 3415 | |
| 3416 | skb = skb_dequeue(SREJ_QUEUE(sk)); |
| 3417 | control |= bt_cb(skb)->sar << L2CAP_CTRL_SAR_SHIFT; |
| 3418 | l2cap_sar_reassembly_sdu(sk, skb, control); |
| 3419 | l2cap_pi(sk)->buffer_seq_srej = |
| 3420 | (l2cap_pi(sk)->buffer_seq_srej + 1) % 64; |
| 3421 | tx_seq++; |
| 3422 | } |
| 3423 | } |
| 3424 | |
| 3425 | static void l2cap_resend_srejframe(struct sock *sk, u8 tx_seq) |
| 3426 | { |
| 3427 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 3428 | struct srej_list *l, *tmp; |
| 3429 | u16 control; |
| 3430 | |
| 3431 | list_for_each_entry_safe(l,tmp, SREJ_LIST(sk), list) { |
| 3432 | if (l->tx_seq == tx_seq) { |
| 3433 | list_del(&l->list); |
| 3434 | kfree(l); |
| 3435 | return; |
| 3436 | } |
| 3437 | control = L2CAP_SUPER_SELECT_REJECT; |
| 3438 | control |= l->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
| 3439 | l2cap_send_sframe(pi, control); |
| 3440 | list_del(&l->list); |
| 3441 | list_add_tail(&l->list, SREJ_LIST(sk)); |
| 3442 | } |
| 3443 | } |
| 3444 | |
| 3445 | static void l2cap_send_srejframe(struct sock *sk, u8 tx_seq) |
| 3446 | { |
| 3447 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 3448 | struct srej_list *new; |
| 3449 | u16 control; |
| 3450 | |
| 3451 | while (tx_seq != pi->expected_tx_seq) { |
| 3452 | control = L2CAP_SUPER_SELECT_REJECT; |
| 3453 | control |= pi->expected_tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
| 3454 | l2cap_send_sframe(pi, control); |
| 3455 | |
| 3456 | new = kzalloc(sizeof(struct srej_list), GFP_ATOMIC); |
| 3457 | new->tx_seq = pi->expected_tx_seq++; |
| 3458 | list_add_tail(&new->list, SREJ_LIST(sk)); |
| 3459 | } |
| 3460 | pi->expected_tx_seq++; |
| 3461 | } |
| 3462 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3463 | static inline int l2cap_data_channel_iframe(struct sock *sk, u16 rx_control, struct sk_buff *skb) |
| 3464 | { |
| 3465 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 3466 | u8 tx_seq = __get_txseq(rx_control); |
Gustavo F. Padovan | 9f121a5 | 2009-10-03 02:34:38 -0300 | [diff] [blame] | 3467 | u8 req_seq = __get_reqseq(rx_control); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3468 | u8 sar = rx_control >> L2CAP_CTRL_SAR_SHIFT; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3469 | int err = 0; |
| 3470 | |
| 3471 | BT_DBG("sk %p rx_control 0x%4.4x len %d", sk, rx_control, skb->len); |
| 3472 | |
Gustavo F. Padovan | 1d8f5d1 | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3473 | if (L2CAP_CTRL_FINAL & rx_control) { |
| 3474 | del_timer(&pi->monitor_timer); |
| 3475 | if (pi->unacked_frames > 0) |
| 3476 | __mod_retrans_timer(); |
| 3477 | pi->conn_state &= ~L2CAP_CONN_WAIT_F; |
| 3478 | } |
| 3479 | |
Gustavo F. Padovan | 9f121a5 | 2009-10-03 02:34:38 -0300 | [diff] [blame] | 3480 | pi->expected_ack_seq = req_seq; |
| 3481 | l2cap_drop_acked_frames(sk); |
| 3482 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3483 | if (tx_seq == pi->expected_tx_seq) |
| 3484 | goto expected; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3485 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3486 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { |
| 3487 | struct srej_list *first; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3488 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3489 | first = list_first_entry(SREJ_LIST(sk), |
| 3490 | struct srej_list, list); |
| 3491 | if (tx_seq == first->tx_seq) { |
| 3492 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); |
| 3493 | l2cap_check_srej_gap(sk, tx_seq); |
| 3494 | |
| 3495 | list_del(&first->list); |
| 3496 | kfree(first); |
| 3497 | |
| 3498 | if (list_empty(SREJ_LIST(sk))) { |
| 3499 | pi->buffer_seq = pi->buffer_seq_srej; |
| 3500 | pi->conn_state &= ~L2CAP_CONN_SREJ_SENT; |
Gustavo F. Padovan | 855666cc | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 3501 | l2cap_send_ack(pi); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3502 | } |
| 3503 | } else { |
| 3504 | struct srej_list *l; |
| 3505 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); |
| 3506 | |
| 3507 | list_for_each_entry(l, SREJ_LIST(sk), list) { |
| 3508 | if (l->tx_seq == tx_seq) { |
| 3509 | l2cap_resend_srejframe(sk, tx_seq); |
| 3510 | return 0; |
| 3511 | } |
| 3512 | } |
| 3513 | l2cap_send_srejframe(sk, tx_seq); |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3514 | } |
| 3515 | } else { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3516 | pi->conn_state |= L2CAP_CONN_SREJ_SENT; |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3517 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3518 | INIT_LIST_HEAD(SREJ_LIST(sk)); |
| 3519 | pi->buffer_seq_srej = pi->buffer_seq; |
| 3520 | |
| 3521 | __skb_queue_head_init(SREJ_QUEUE(sk)); |
| 3522 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); |
| 3523 | |
Gustavo F. Padovan | ef54fd9 | 2009-08-20 22:26:04 -0300 | [diff] [blame] | 3524 | pi->conn_state |= L2CAP_CONN_SEND_PBIT; |
| 3525 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3526 | l2cap_send_srejframe(sk, tx_seq); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3527 | } |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3528 | return 0; |
| 3529 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3530 | expected: |
| 3531 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; |
| 3532 | |
| 3533 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { |
| 3534 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); |
| 3535 | return 0; |
| 3536 | } |
| 3537 | |
Gustavo F. Padovan | 4ec10d9 | 2009-10-03 02:34:39 -0300 | [diff] [blame] | 3538 | if (rx_control & L2CAP_CTRL_FINAL) { |
| 3539 | if (pi->conn_state & L2CAP_CONN_REJ_ACT) |
| 3540 | pi->conn_state &= ~L2CAP_CONN_REJ_ACT; |
| 3541 | else { |
| 3542 | sk->sk_send_head = TX_QUEUE(sk)->next; |
| 3543 | pi->next_tx_seq = pi->expected_ack_seq; |
| 3544 | l2cap_ertm_send(sk); |
| 3545 | } |
| 3546 | } |
| 3547 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3548 | pi->buffer_seq = (pi->buffer_seq + 1) % 64; |
| 3549 | |
| 3550 | err = l2cap_sar_reassembly_sdu(sk, skb, rx_control); |
| 3551 | if (err < 0) |
| 3552 | return err; |
| 3553 | |
Gustavo F. Padovan | c1b4f43 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3554 | __mod_ack_timer(); |
| 3555 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3556 | pi->num_to_ack = (pi->num_to_ack + 1) % L2CAP_DEFAULT_NUM_TO_ACK; |
Gustavo F. Padovan | 9e917af | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3557 | if (pi->num_to_ack == L2CAP_DEFAULT_NUM_TO_ACK - 1) |
| 3558 | l2cap_send_ack(pi); |
| 3559 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3560 | return 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3561 | } |
| 3562 | |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3563 | 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] | 3564 | { |
| 3565 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
Gustavo F. Padovan | 6e3a598 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3566 | |
| 3567 | pi->expected_ack_seq = __get_reqseq(rx_control); |
| 3568 | l2cap_drop_acked_frames(sk); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3569 | |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3570 | if (rx_control & L2CAP_CTRL_POLL) { |
Gustavo F. Padovan | 05fbd89 | 2010-05-01 16:15:39 -0300 | [diff] [blame] | 3571 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { |
| 3572 | if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY) && |
| 3573 | (pi->unacked_frames > 0)) |
| 3574 | __mod_retrans_timer(); |
| 3575 | |
| 3576 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
| 3577 | l2cap_send_srejtail(sk); |
| 3578 | } else { |
| 3579 | l2cap_send_i_or_rr_or_rnr(sk); |
| 3580 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
| 3581 | } |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3582 | |
| 3583 | } else if (rx_control & L2CAP_CTRL_FINAL) { |
| 3584 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3585 | |
| 3586 | if (pi->conn_state & L2CAP_CONN_REJ_ACT) |
| 3587 | pi->conn_state &= ~L2CAP_CONN_REJ_ACT; |
| 3588 | else { |
| 3589 | sk->sk_send_head = TX_QUEUE(sk)->next; |
| 3590 | pi->next_tx_seq = pi->expected_ack_seq; |
| 3591 | l2cap_ertm_send(sk); |
| 3592 | } |
| 3593 | |
| 3594 | } else { |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3595 | if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY) && |
| 3596 | (pi->unacked_frames > 0)) |
| 3597 | __mod_retrans_timer(); |
| 3598 | |
| 3599 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
| 3600 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) |
| 3601 | l2cap_send_ack(pi); |
| 3602 | else |
| 3603 | l2cap_ertm_send(sk); |
| 3604 | } |
| 3605 | } |
| 3606 | |
| 3607 | static inline void l2cap_data_channel_rejframe(struct sock *sk, u16 rx_control) |
| 3608 | { |
| 3609 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 3610 | u8 tx_seq = __get_reqseq(rx_control); |
| 3611 | |
| 3612 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
| 3613 | |
Gustavo F. Padovan | 8abb52e | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3614 | pi->expected_ack_seq = tx_seq; |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3615 | l2cap_drop_acked_frames(sk); |
| 3616 | |
| 3617 | if (rx_control & L2CAP_CTRL_FINAL) { |
| 3618 | if (pi->conn_state & L2CAP_CONN_REJ_ACT) |
| 3619 | pi->conn_state &= ~L2CAP_CONN_REJ_ACT; |
| 3620 | else { |
| 3621 | sk->sk_send_head = TX_QUEUE(sk)->next; |
| 3622 | pi->next_tx_seq = pi->expected_ack_seq; |
| 3623 | l2cap_ertm_send(sk); |
| 3624 | } |
| 3625 | } else { |
| 3626 | sk->sk_send_head = TX_QUEUE(sk)->next; |
| 3627 | pi->next_tx_seq = pi->expected_ack_seq; |
| 3628 | l2cap_ertm_send(sk); |
| 3629 | |
| 3630 | if (pi->conn_state & L2CAP_CONN_WAIT_F) { |
| 3631 | pi->srej_save_reqseq = tx_seq; |
| 3632 | pi->conn_state |= L2CAP_CONN_REJ_ACT; |
| 3633 | } |
| 3634 | } |
| 3635 | } |
| 3636 | static inline void l2cap_data_channel_srejframe(struct sock *sk, u16 rx_control) |
| 3637 | { |
| 3638 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 3639 | u8 tx_seq = __get_reqseq(rx_control); |
| 3640 | |
| 3641 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
| 3642 | |
| 3643 | if (rx_control & L2CAP_CTRL_POLL) { |
| 3644 | pi->expected_ack_seq = tx_seq; |
| 3645 | l2cap_drop_acked_frames(sk); |
| 3646 | l2cap_retransmit_frame(sk, tx_seq); |
| 3647 | l2cap_ertm_send(sk); |
| 3648 | if (pi->conn_state & L2CAP_CONN_WAIT_F) { |
| 3649 | pi->srej_save_reqseq = tx_seq; |
| 3650 | pi->conn_state |= L2CAP_CONN_SREJ_ACT; |
| 3651 | } |
| 3652 | } else if (rx_control & L2CAP_CTRL_FINAL) { |
| 3653 | if ((pi->conn_state & L2CAP_CONN_SREJ_ACT) && |
| 3654 | pi->srej_save_reqseq == tx_seq) |
| 3655 | pi->conn_state &= ~L2CAP_CONN_SREJ_ACT; |
| 3656 | else |
| 3657 | l2cap_retransmit_frame(sk, tx_seq); |
| 3658 | } else { |
| 3659 | l2cap_retransmit_frame(sk, tx_seq); |
| 3660 | if (pi->conn_state & L2CAP_CONN_WAIT_F) { |
| 3661 | pi->srej_save_reqseq = tx_seq; |
| 3662 | pi->conn_state |= L2CAP_CONN_SREJ_ACT; |
| 3663 | } |
| 3664 | } |
| 3665 | } |
| 3666 | |
| 3667 | static inline void l2cap_data_channel_rnrframe(struct sock *sk, u16 rx_control) |
| 3668 | { |
| 3669 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 3670 | u8 tx_seq = __get_reqseq(rx_control); |
| 3671 | |
| 3672 | pi->conn_state |= L2CAP_CONN_REMOTE_BUSY; |
| 3673 | pi->expected_ack_seq = tx_seq; |
| 3674 | l2cap_drop_acked_frames(sk); |
| 3675 | |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3676 | if (!(pi->conn_state & L2CAP_CONN_SREJ_SENT)) { |
| 3677 | del_timer(&pi->retrans_timer); |
| 3678 | if (rx_control & L2CAP_CTRL_POLL) { |
| 3679 | u16 control = L2CAP_CTRL_FINAL; |
| 3680 | l2cap_send_rr_or_rnr(pi, control); |
| 3681 | } |
| 3682 | return; |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3683 | } |
Gustavo F. Padovan | 99b0d4b | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3684 | |
| 3685 | if (rx_control & L2CAP_CTRL_POLL) |
| 3686 | l2cap_send_srejtail(sk); |
| 3687 | else |
| 3688 | l2cap_send_sframe(pi, L2CAP_SUPER_RCV_READY); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3689 | } |
| 3690 | |
| 3691 | static inline int l2cap_data_channel_sframe(struct sock *sk, u16 rx_control, struct sk_buff *skb) |
| 3692 | { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3693 | BT_DBG("sk %p rx_control 0x%4.4x len %d", sk, rx_control, skb->len); |
| 3694 | |
Gustavo F. Padovan | 1d8f5d1 | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3695 | if (L2CAP_CTRL_FINAL & rx_control) { |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3696 | del_timer(&l2cap_pi(sk)->monitor_timer); |
| 3697 | if (l2cap_pi(sk)->unacked_frames > 0) |
Gustavo F. Padovan | 1d8f5d1 | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3698 | __mod_retrans_timer(); |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3699 | l2cap_pi(sk)->conn_state &= ~L2CAP_CONN_WAIT_F; |
Gustavo F. Padovan | 1d8f5d1 | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3700 | } |
| 3701 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3702 | switch (rx_control & L2CAP_CTRL_SUPERVISE) { |
| 3703 | case L2CAP_SUPER_RCV_READY: |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3704 | l2cap_data_channel_rrframe(sk, rx_control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3705 | break; |
| 3706 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3707 | case L2CAP_SUPER_REJECT: |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3708 | l2cap_data_channel_rejframe(sk, rx_control); |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3709 | break; |
| 3710 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3711 | case L2CAP_SUPER_SELECT_REJECT: |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3712 | l2cap_data_channel_srejframe(sk, rx_control); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3713 | break; |
| 3714 | |
| 3715 | case L2CAP_SUPER_RCV_NOT_READY: |
Gustavo F. Padovan | e072745 | 2010-05-01 16:15:38 -0300 | [diff] [blame] | 3716 | l2cap_data_channel_rnrframe(sk, rx_control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3717 | break; |
| 3718 | } |
| 3719 | |
Gustavo F. Padovan | faaebd1 | 2010-05-01 16:15:35 -0300 | [diff] [blame] | 3720 | kfree_skb(skb); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3721 | return 0; |
| 3722 | } |
| 3723 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3724 | static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) |
| 3725 | { |
| 3726 | struct sock *sk; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3727 | struct l2cap_pinfo *pi; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3728 | u16 control, len; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3729 | u8 tx_seq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3730 | |
| 3731 | sk = l2cap_get_chan_by_scid(&conn->chan_list, cid); |
| 3732 | if (!sk) { |
| 3733 | BT_DBG("unknown cid 0x%4.4x", cid); |
| 3734 | goto drop; |
| 3735 | } |
| 3736 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3737 | pi = l2cap_pi(sk); |
| 3738 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3739 | BT_DBG("sk %p, len %d", sk, skb->len); |
| 3740 | |
| 3741 | if (sk->sk_state != BT_CONNECTED) |
| 3742 | goto drop; |
| 3743 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3744 | switch (pi->mode) { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3745 | case L2CAP_MODE_BASIC: |
| 3746 | /* If socket recv buffers overflows we drop data here |
| 3747 | * which is *bad* because L2CAP has to be reliable. |
| 3748 | * But we don't have any other choice. L2CAP doesn't |
| 3749 | * provide flow control mechanism. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3750 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3751 | if (pi->imtu < skb->len) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3752 | goto drop; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3753 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3754 | if (!sock_queue_rcv_skb(sk, skb)) |
| 3755 | goto done; |
| 3756 | break; |
| 3757 | |
| 3758 | case L2CAP_MODE_ERTM: |
| 3759 | control = get_unaligned_le16(skb->data); |
| 3760 | skb_pull(skb, 2); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3761 | len = skb->len; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3762 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3763 | if (__is_sar_start(control)) |
| 3764 | len -= 2; |
| 3765 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3766 | if (pi->fcs == L2CAP_FCS_CRC16) |
| 3767 | len -= 2; |
| 3768 | |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3769 | /* |
| 3770 | * We can just drop the corrupted I-frame here. |
| 3771 | * Receiver will miss it and start proper recovery |
| 3772 | * procedures and ask retransmission. |
| 3773 | */ |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 3774 | if (len > pi->mps) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3775 | goto drop; |
| 3776 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3777 | if (l2cap_check_fcs(pi, skb)) |
| 3778 | goto drop; |
| 3779 | |
Gustavo F. Padovan | 277ffbe | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3780 | if (__is_iframe(control)) { |
| 3781 | if (len < 4) |
| 3782 | goto drop; |
| 3783 | |
Andrei Emeltchenko | fcafde2 | 2009-12-22 15:58:08 +0200 | [diff] [blame] | 3784 | l2cap_data_channel_iframe(sk, control, skb); |
Gustavo F. Padovan | 277ffbe | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3785 | } else { |
| 3786 | if (len != 0) |
| 3787 | goto drop; |
| 3788 | |
Andrei Emeltchenko | fcafde2 | 2009-12-22 15:58:08 +0200 | [diff] [blame] | 3789 | l2cap_data_channel_sframe(sk, control, skb); |
Gustavo F. Padovan | 277ffbe | 2010-05-01 16:15:37 -0300 | [diff] [blame] | 3790 | } |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3791 | |
Andrei Emeltchenko | fcafde2 | 2009-12-22 15:58:08 +0200 | [diff] [blame] | 3792 | goto done; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3793 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3794 | case L2CAP_MODE_STREAMING: |
| 3795 | control = get_unaligned_le16(skb->data); |
| 3796 | skb_pull(skb, 2); |
| 3797 | len = skb->len; |
| 3798 | |
| 3799 | if (__is_sar_start(control)) |
| 3800 | len -= 2; |
| 3801 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3802 | if (pi->fcs == L2CAP_FCS_CRC16) |
| 3803 | len -= 2; |
| 3804 | |
Gustavo F. Padovan | 1c76215 | 2010-05-01 16:15:40 -0300 | [diff] [blame] | 3805 | if (len > pi->mps || len < 4 || __is_sframe(control)) |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3806 | goto drop; |
| 3807 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3808 | if (l2cap_check_fcs(pi, skb)) |
| 3809 | goto drop; |
| 3810 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3811 | tx_seq = __get_txseq(control); |
| 3812 | |
| 3813 | if (pi->expected_tx_seq == tx_seq) |
| 3814 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; |
| 3815 | else |
Gustavo F. Padovan | 7dffe42 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3816 | pi->expected_tx_seq = (tx_seq + 1) % 64; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3817 | |
Andrei Emeltchenko | fcafde2 | 2009-12-22 15:58:08 +0200 | [diff] [blame] | 3818 | l2cap_sar_reassembly_sdu(sk, skb, control); |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3819 | |
| 3820 | goto done; |
| 3821 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3822 | default: |
Gustavo F. Padovan | e8235c6 | 2010-05-01 16:15:36 -0300 | [diff] [blame] | 3823 | 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] | 3824 | break; |
| 3825 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3826 | |
| 3827 | drop: |
| 3828 | kfree_skb(skb); |
| 3829 | |
| 3830 | done: |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 3831 | if (sk) |
| 3832 | bh_unlock_sock(sk); |
| 3833 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3834 | return 0; |
| 3835 | } |
| 3836 | |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 3837 | 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] | 3838 | { |
| 3839 | struct sock *sk; |
| 3840 | |
| 3841 | sk = l2cap_get_sock_by_psm(0, psm, conn->src); |
| 3842 | if (!sk) |
| 3843 | goto drop; |
| 3844 | |
| 3845 | BT_DBG("sk %p, len %d", sk, skb->len); |
| 3846 | |
| 3847 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECTED) |
| 3848 | goto drop; |
| 3849 | |
| 3850 | if (l2cap_pi(sk)->imtu < skb->len) |
| 3851 | goto drop; |
| 3852 | |
| 3853 | if (!sock_queue_rcv_skb(sk, skb)) |
| 3854 | goto done; |
| 3855 | |
| 3856 | drop: |
| 3857 | kfree_skb(skb); |
| 3858 | |
| 3859 | done: |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 3860 | if (sk) |
| 3861 | bh_unlock_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3862 | return 0; |
| 3863 | } |
| 3864 | |
| 3865 | static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) |
| 3866 | { |
| 3867 | struct l2cap_hdr *lh = (void *) skb->data; |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 3868 | u16 cid, len; |
| 3869 | __le16 psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3870 | |
| 3871 | skb_pull(skb, L2CAP_HDR_SIZE); |
| 3872 | cid = __le16_to_cpu(lh->cid); |
| 3873 | len = __le16_to_cpu(lh->len); |
| 3874 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3875 | if (len != skb->len) { |
| 3876 | kfree_skb(skb); |
| 3877 | return; |
| 3878 | } |
| 3879 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3880 | BT_DBG("len %d, cid 0x%4.4x", len, cid); |
| 3881 | |
| 3882 | switch (cid) { |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 3883 | case L2CAP_CID_SIGNALING: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3884 | l2cap_sig_channel(conn, skb); |
| 3885 | break; |
| 3886 | |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 3887 | case L2CAP_CID_CONN_LESS: |
Gustavo F. Padovan | 1b7bf4e | 2009-08-24 00:45:20 -0300 | [diff] [blame] | 3888 | psm = get_unaligned_le16(skb->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3889 | skb_pull(skb, 2); |
| 3890 | l2cap_conless_channel(conn, psm, skb); |
| 3891 | break; |
| 3892 | |
| 3893 | default: |
| 3894 | l2cap_data_channel(conn, cid, skb); |
| 3895 | break; |
| 3896 | } |
| 3897 | } |
| 3898 | |
| 3899 | /* ---- L2CAP interface with lower layer (HCI) ---- */ |
| 3900 | |
| 3901 | static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) |
| 3902 | { |
| 3903 | int exact = 0, lm1 = 0, lm2 = 0; |
| 3904 | register struct sock *sk; |
| 3905 | struct hlist_node *node; |
| 3906 | |
| 3907 | if (type != ACL_LINK) |
| 3908 | return 0; |
| 3909 | |
| 3910 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); |
| 3911 | |
| 3912 | /* Find listening sockets and check their link_mode */ |
| 3913 | read_lock(&l2cap_sk_list.lock); |
| 3914 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
| 3915 | if (sk->sk_state != BT_LISTEN) |
| 3916 | continue; |
| 3917 | |
| 3918 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 3919 | lm1 |= HCI_LM_ACCEPT; |
| 3920 | if (l2cap_pi(sk)->role_switch) |
| 3921 | lm1 |= HCI_LM_MASTER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3922 | exact++; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 3923 | } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { |
| 3924 | lm2 |= HCI_LM_ACCEPT; |
| 3925 | if (l2cap_pi(sk)->role_switch) |
| 3926 | lm2 |= HCI_LM_MASTER; |
| 3927 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3928 | } |
| 3929 | read_unlock(&l2cap_sk_list.lock); |
| 3930 | |
| 3931 | return exact ? lm1 : lm2; |
| 3932 | } |
| 3933 | |
| 3934 | static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) |
| 3935 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 3936 | struct l2cap_conn *conn; |
| 3937 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3938 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); |
| 3939 | |
| 3940 | if (hcon->type != ACL_LINK) |
| 3941 | return 0; |
| 3942 | |
| 3943 | if (!status) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3944 | conn = l2cap_conn_add(hcon, status); |
| 3945 | if (conn) |
| 3946 | l2cap_conn_ready(conn); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 3947 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3948 | l2cap_conn_del(hcon, bt_err(status)); |
| 3949 | |
| 3950 | return 0; |
| 3951 | } |
| 3952 | |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 3953 | static int l2cap_disconn_ind(struct hci_conn *hcon) |
| 3954 | { |
| 3955 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 3956 | |
| 3957 | BT_DBG("hcon %p", hcon); |
| 3958 | |
| 3959 | if (hcon->type != ACL_LINK || !conn) |
| 3960 | return 0x13; |
| 3961 | |
| 3962 | return conn->disc_reason; |
| 3963 | } |
| 3964 | |
| 3965 | static int l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3966 | { |
| 3967 | BT_DBG("hcon %p reason %d", hcon, reason); |
| 3968 | |
| 3969 | if (hcon->type != ACL_LINK) |
| 3970 | return 0; |
| 3971 | |
| 3972 | l2cap_conn_del(hcon, bt_err(reason)); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 3973 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3974 | return 0; |
| 3975 | } |
| 3976 | |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 3977 | static inline void l2cap_check_encryption(struct sock *sk, u8 encrypt) |
| 3978 | { |
Marcel Holtmann | 255c760 | 2009-02-04 21:07:19 +0100 | [diff] [blame] | 3979 | if (sk->sk_type != SOCK_SEQPACKET) |
| 3980 | return; |
| 3981 | |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 3982 | if (encrypt == 0x00) { |
| 3983 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) { |
| 3984 | l2cap_sock_clear_timer(sk); |
| 3985 | l2cap_sock_set_timer(sk, HZ * 5); |
| 3986 | } else if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) |
| 3987 | __l2cap_sock_close(sk, ECONNREFUSED); |
| 3988 | } else { |
| 3989 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) |
| 3990 | l2cap_sock_clear_timer(sk); |
| 3991 | } |
| 3992 | } |
| 3993 | |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 3994 | 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] | 3995 | { |
| 3996 | struct l2cap_chan_list *l; |
Marcel Holtmann | 40be492 | 2008-07-14 20:13:50 +0200 | [diff] [blame] | 3997 | struct l2cap_conn *conn = hcon->l2cap_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3998 | struct sock *sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3999 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4000 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4001 | return 0; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 4002 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4003 | l = &conn->chan_list; |
| 4004 | |
| 4005 | BT_DBG("conn %p", conn); |
| 4006 | |
| 4007 | read_lock(&l->lock); |
| 4008 | |
| 4009 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
| 4010 | bh_lock_sock(sk); |
| 4011 | |
Marcel Holtmann | 6a8d301 | 2009-02-06 23:56:36 +0100 | [diff] [blame] | 4012 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_CONNECT_PEND) { |
| 4013 | bh_unlock_sock(sk); |
| 4014 | continue; |
| 4015 | } |
| 4016 | |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4017 | if (!status && (sk->sk_state == BT_CONNECTED || |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 4018 | sk->sk_state == BT_CONFIG)) { |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 4019 | l2cap_check_encryption(sk, encrypt); |
Marcel Holtmann | 9719f8a | 2008-07-14 20:13:45 +0200 | [diff] [blame] | 4020 | bh_unlock_sock(sk); |
| 4021 | continue; |
| 4022 | } |
| 4023 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4024 | if (sk->sk_state == BT_CONNECT) { |
| 4025 | if (!status) { |
| 4026 | struct l2cap_conn_req req; |
| 4027 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 4028 | req.psm = l2cap_pi(sk)->psm; |
| 4029 | |
| 4030 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
| 4031 | |
| 4032 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
| 4033 | L2CAP_CONN_REQ, sizeof(req), &req); |
| 4034 | } else { |
| 4035 | l2cap_sock_clear_timer(sk); |
| 4036 | l2cap_sock_set_timer(sk, HZ / 10); |
| 4037 | } |
| 4038 | } else if (sk->sk_state == BT_CONNECT2) { |
| 4039 | struct l2cap_conn_rsp rsp; |
| 4040 | __u16 result; |
| 4041 | |
| 4042 | if (!status) { |
| 4043 | sk->sk_state = BT_CONFIG; |
| 4044 | result = L2CAP_CR_SUCCESS; |
| 4045 | } else { |
| 4046 | sk->sk_state = BT_DISCONN; |
| 4047 | l2cap_sock_set_timer(sk, HZ / 10); |
| 4048 | result = L2CAP_CR_SEC_BLOCK; |
| 4049 | } |
| 4050 | |
| 4051 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 4052 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 4053 | rsp.result = cpu_to_le16(result); |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 4054 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4055 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
| 4056 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4057 | } |
| 4058 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4059 | bh_unlock_sock(sk); |
| 4060 | } |
| 4061 | |
| 4062 | read_unlock(&l->lock); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 4063 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4064 | return 0; |
| 4065 | } |
| 4066 | |
| 4067 | static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) |
| 4068 | { |
| 4069 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 4070 | |
| 4071 | if (!conn && !(conn = l2cap_conn_add(hcon, 0))) |
| 4072 | goto drop; |
| 4073 | |
| 4074 | BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); |
| 4075 | |
| 4076 | if (flags & ACL_START) { |
| 4077 | struct l2cap_hdr *hdr; |
| 4078 | int len; |
| 4079 | |
| 4080 | if (conn->rx_len) { |
| 4081 | BT_ERR("Unexpected start frame (len %d)", skb->len); |
| 4082 | kfree_skb(conn->rx_skb); |
| 4083 | conn->rx_skb = NULL; |
| 4084 | conn->rx_len = 0; |
| 4085 | l2cap_conn_unreliable(conn, ECOMM); |
| 4086 | } |
| 4087 | |
| 4088 | if (skb->len < 2) { |
| 4089 | BT_ERR("Frame is too short (len %d)", skb->len); |
| 4090 | l2cap_conn_unreliable(conn, ECOMM); |
| 4091 | goto drop; |
| 4092 | } |
| 4093 | |
| 4094 | hdr = (struct l2cap_hdr *) skb->data; |
| 4095 | len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; |
| 4096 | |
| 4097 | if (len == skb->len) { |
| 4098 | /* Complete frame received */ |
| 4099 | l2cap_recv_frame(conn, skb); |
| 4100 | return 0; |
| 4101 | } |
| 4102 | |
| 4103 | BT_DBG("Start: total len %d, frag len %d", len, skb->len); |
| 4104 | |
| 4105 | if (skb->len > len) { |
| 4106 | BT_ERR("Frame is too long (len %d, expected len %d)", |
| 4107 | skb->len, len); |
| 4108 | l2cap_conn_unreliable(conn, ECOMM); |
| 4109 | goto drop; |
| 4110 | } |
| 4111 | |
| 4112 | /* Allocate skb for the complete frame (with header) */ |
Gustavo F. Padovan | af05b30b | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 4113 | conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC); |
| 4114 | if (!conn->rx_skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4115 | goto drop; |
| 4116 | |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 4117 | 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] | 4118 | skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4119 | conn->rx_len = len - skb->len; |
| 4120 | } else { |
| 4121 | BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); |
| 4122 | |
| 4123 | if (!conn->rx_len) { |
| 4124 | BT_ERR("Unexpected continuation frame (len %d)", skb->len); |
| 4125 | l2cap_conn_unreliable(conn, ECOMM); |
| 4126 | goto drop; |
| 4127 | } |
| 4128 | |
| 4129 | if (skb->len > conn->rx_len) { |
| 4130 | BT_ERR("Fragment is too long (len %d, expected %d)", |
| 4131 | skb->len, conn->rx_len); |
| 4132 | kfree_skb(conn->rx_skb); |
| 4133 | conn->rx_skb = NULL; |
| 4134 | conn->rx_len = 0; |
| 4135 | l2cap_conn_unreliable(conn, ECOMM); |
| 4136 | goto drop; |
| 4137 | } |
| 4138 | |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 4139 | 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] | 4140 | skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4141 | conn->rx_len -= skb->len; |
| 4142 | |
| 4143 | if (!conn->rx_len) { |
| 4144 | /* Complete frame received */ |
| 4145 | l2cap_recv_frame(conn, conn->rx_skb); |
| 4146 | conn->rx_skb = NULL; |
| 4147 | } |
| 4148 | } |
| 4149 | |
| 4150 | drop: |
| 4151 | kfree_skb(skb); |
| 4152 | return 0; |
| 4153 | } |
| 4154 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4155 | static int l2cap_debugfs_show(struct seq_file *f, void *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4156 | { |
| 4157 | struct sock *sk; |
| 4158 | struct hlist_node *node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4159 | |
| 4160 | read_lock_bh(&l2cap_sk_list.lock); |
| 4161 | |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 4162 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
| 4163 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4164 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4165 | seq_printf(f, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d %d\n", |
| 4166 | batostr(&bt_sk(sk)->src), |
| 4167 | batostr(&bt_sk(sk)->dst), |
| 4168 | sk->sk_state, __le16_to_cpu(pi->psm), |
| 4169 | pi->scid, pi->dcid, |
| 4170 | pi->imtu, pi->omtu, pi->sec_level); |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 4171 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4172 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4173 | read_unlock_bh(&l2cap_sk_list.lock); |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 4174 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4175 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4176 | } |
| 4177 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4178 | static int l2cap_debugfs_open(struct inode *inode, struct file *file) |
| 4179 | { |
| 4180 | return single_open(file, l2cap_debugfs_show, inode->i_private); |
| 4181 | } |
| 4182 | |
| 4183 | static const struct file_operations l2cap_debugfs_fops = { |
| 4184 | .open = l2cap_debugfs_open, |
| 4185 | .read = seq_read, |
| 4186 | .llseek = seq_lseek, |
| 4187 | .release = single_release, |
| 4188 | }; |
| 4189 | |
| 4190 | static struct dentry *l2cap_debugfs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4191 | |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 4192 | static const struct proto_ops l2cap_sock_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4193 | .family = PF_BLUETOOTH, |
| 4194 | .owner = THIS_MODULE, |
| 4195 | .release = l2cap_sock_release, |
| 4196 | .bind = l2cap_sock_bind, |
| 4197 | .connect = l2cap_sock_connect, |
| 4198 | .listen = l2cap_sock_listen, |
| 4199 | .accept = l2cap_sock_accept, |
| 4200 | .getname = l2cap_sock_getname, |
| 4201 | .sendmsg = l2cap_sock_sendmsg, |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 4202 | .recvmsg = l2cap_sock_recvmsg, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4203 | .poll = bt_sock_poll, |
Marcel Holtmann | 3241ad8 | 2008-07-14 20:13:50 +0200 | [diff] [blame] | 4204 | .ioctl = bt_sock_ioctl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4205 | .mmap = sock_no_mmap, |
| 4206 | .socketpair = sock_no_socketpair, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4207 | .shutdown = l2cap_sock_shutdown, |
| 4208 | .setsockopt = l2cap_sock_setsockopt, |
| 4209 | .getsockopt = l2cap_sock_getsockopt |
| 4210 | }; |
| 4211 | |
Stephen Hemminger | ec1b4cf | 2009-10-05 05:58:39 +0000 | [diff] [blame] | 4212 | static const struct net_proto_family l2cap_sock_family_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4213 | .family = PF_BLUETOOTH, |
| 4214 | .owner = THIS_MODULE, |
| 4215 | .create = l2cap_sock_create, |
| 4216 | }; |
| 4217 | |
| 4218 | static struct hci_proto l2cap_hci_proto = { |
| 4219 | .name = "L2CAP", |
| 4220 | .id = HCI_PROTO_L2CAP, |
| 4221 | .connect_ind = l2cap_connect_ind, |
| 4222 | .connect_cfm = l2cap_connect_cfm, |
| 4223 | .disconn_ind = l2cap_disconn_ind, |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 4224 | .disconn_cfm = l2cap_disconn_cfm, |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 4225 | .security_cfm = l2cap_security_cfm, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4226 | .recv_acldata = l2cap_recv_acldata |
| 4227 | }; |
| 4228 | |
| 4229 | static int __init l2cap_init(void) |
| 4230 | { |
| 4231 | int err; |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 4232 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4233 | err = proto_register(&l2cap_proto, 0); |
| 4234 | if (err < 0) |
| 4235 | return err; |
| 4236 | |
| 4237 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); |
| 4238 | if (err < 0) { |
| 4239 | BT_ERR("L2CAP socket registration failed"); |
| 4240 | goto error; |
| 4241 | } |
| 4242 | |
| 4243 | err = hci_register_proto(&l2cap_hci_proto); |
| 4244 | if (err < 0) { |
| 4245 | BT_ERR("L2CAP protocol registration failed"); |
| 4246 | bt_sock_unregister(BTPROTO_L2CAP); |
| 4247 | goto error; |
| 4248 | } |
| 4249 | |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4250 | if (bt_debugfs) { |
| 4251 | l2cap_debugfs = debugfs_create_file("l2cap", 0444, |
| 4252 | bt_debugfs, NULL, &l2cap_debugfs_fops); |
| 4253 | if (!l2cap_debugfs) |
| 4254 | BT_ERR("Failed to create L2CAP debug file"); |
| 4255 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4256 | |
| 4257 | BT_INFO("L2CAP ver %s", VERSION); |
| 4258 | BT_INFO("L2CAP socket layer initialized"); |
| 4259 | |
| 4260 | return 0; |
| 4261 | |
| 4262 | error: |
| 4263 | proto_unregister(&l2cap_proto); |
| 4264 | return err; |
| 4265 | } |
| 4266 | |
| 4267 | static void __exit l2cap_exit(void) |
| 4268 | { |
Marcel Holtmann | aef7d97 | 2010-03-21 05:27:45 +0100 | [diff] [blame] | 4269 | debugfs_remove(l2cap_debugfs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4270 | |
| 4271 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) |
| 4272 | BT_ERR("L2CAP socket unregistration failed"); |
| 4273 | |
| 4274 | if (hci_unregister_proto(&l2cap_hci_proto) < 0) |
| 4275 | BT_ERR("L2CAP protocol unregistration failed"); |
| 4276 | |
| 4277 | proto_unregister(&l2cap_proto); |
| 4278 | } |
| 4279 | |
| 4280 | void l2cap_load(void) |
| 4281 | { |
| 4282 | /* Dummy function to trigger automatic L2CAP module loading by |
| 4283 | * other modules that use L2CAP sockets but don't use any other |
| 4284 | * symbols from it. */ |
| 4285 | return; |
| 4286 | } |
| 4287 | EXPORT_SYMBOL(l2cap_load); |
| 4288 | |
| 4289 | module_init(l2cap_init); |
| 4290 | module_exit(l2cap_exit); |
| 4291 | |
Marcel Holtmann | 44dd46d | 2009-05-02 19:09:01 -0700 | [diff] [blame] | 4292 | module_param(enable_ertm, bool, 0644); |
| 4293 | MODULE_PARM_DESC(enable_ertm, "Enable enhanced retransmission mode"); |
| 4294 | |
Marcel Holtmann | 5fbcd3d | 2009-10-05 11:35:43 +0200 | [diff] [blame] | 4295 | module_param(max_transmit, uint, 0644); |
| 4296 | MODULE_PARM_DESC(max_transmit, "Max transmit value (default = 3)"); |
| 4297 | |
Marcel Holtmann | 63fbd24 | 2008-08-18 13:23:53 +0200 | [diff] [blame] | 4298 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4299 | MODULE_DESCRIPTION("Bluetooth L2CAP ver " VERSION); |
| 4300 | MODULE_VERSION(VERSION); |
| 4301 | MODULE_LICENSE("GPL"); |
| 4302 | MODULE_ALIAS("bt-proto-0"); |