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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include <net/sock.h> |
| 44 | |
| 45 | #include <asm/system.h> |
| 46 | #include <asm/uaccess.h> |
| 47 | #include <asm/unaligned.h> |
| 48 | |
| 49 | #include <net/bluetooth/bluetooth.h> |
| 50 | #include <net/bluetooth/hci_core.h> |
| 51 | #include <net/bluetooth/l2cap.h> |
| 52 | |
| 53 | #ifndef CONFIG_BT_L2CAP_DEBUG |
| 54 | #undef BT_DBG |
| 55 | #define BT_DBG(D...) |
| 56 | #endif |
| 57 | |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 58 | #define VERSION "2.9" |
| 59 | |
| 60 | static u32 l2cap_feat_mask = 0x0000; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 62 | static const struct proto_ops l2cap_sock_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
| 64 | static struct bt_sock_list l2cap_sk_list = { |
| 65 | .lock = RW_LOCK_UNLOCKED |
| 66 | }; |
| 67 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | static void __l2cap_sock_close(struct sock *sk, int reason); |
| 69 | static void l2cap_sock_close(struct sock *sk); |
| 70 | static void l2cap_sock_kill(struct sock *sk); |
| 71 | |
| 72 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, |
| 73 | u8 code, u8 ident, u16 dlen, void *data); |
| 74 | |
| 75 | /* ---- L2CAP timers ---- */ |
| 76 | static void l2cap_sock_timeout(unsigned long arg) |
| 77 | { |
| 78 | struct sock *sk = (struct sock *) arg; |
| 79 | |
| 80 | BT_DBG("sock %p state %d", sk, sk->sk_state); |
| 81 | |
| 82 | bh_lock_sock(sk); |
| 83 | __l2cap_sock_close(sk, ETIMEDOUT); |
| 84 | bh_unlock_sock(sk); |
| 85 | |
| 86 | l2cap_sock_kill(sk); |
| 87 | sock_put(sk); |
| 88 | } |
| 89 | |
| 90 | static void l2cap_sock_set_timer(struct sock *sk, long timeout) |
| 91 | { |
| 92 | BT_DBG("sk %p state %d timeout %ld", sk, sk->sk_state, timeout); |
| 93 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); |
| 94 | } |
| 95 | |
| 96 | static void l2cap_sock_clear_timer(struct sock *sk) |
| 97 | { |
| 98 | BT_DBG("sock %p state %d", sk, sk->sk_state); |
| 99 | sk_stop_timer(sk, &sk->sk_timer); |
| 100 | } |
| 101 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 102 | /* ---- L2CAP channels ---- */ |
| 103 | static struct sock *__l2cap_get_chan_by_dcid(struct l2cap_chan_list *l, u16 cid) |
| 104 | { |
| 105 | struct sock *s; |
| 106 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { |
| 107 | if (l2cap_pi(s)->dcid == cid) |
| 108 | break; |
| 109 | } |
| 110 | return s; |
| 111 | } |
| 112 | |
| 113 | static struct sock *__l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) |
| 114 | { |
| 115 | struct sock *s; |
| 116 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { |
| 117 | if (l2cap_pi(s)->scid == cid) |
| 118 | break; |
| 119 | } |
| 120 | return s; |
| 121 | } |
| 122 | |
| 123 | /* Find channel with given SCID. |
| 124 | * Returns locked socket */ |
| 125 | static inline struct sock *l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) |
| 126 | { |
| 127 | struct sock *s; |
| 128 | read_lock(&l->lock); |
| 129 | s = __l2cap_get_chan_by_scid(l, cid); |
| 130 | if (s) bh_lock_sock(s); |
| 131 | read_unlock(&l->lock); |
| 132 | return s; |
| 133 | } |
| 134 | |
| 135 | static struct sock *__l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) |
| 136 | { |
| 137 | struct sock *s; |
| 138 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { |
| 139 | if (l2cap_pi(s)->ident == ident) |
| 140 | break; |
| 141 | } |
| 142 | return s; |
| 143 | } |
| 144 | |
| 145 | static inline struct sock *l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) |
| 146 | { |
| 147 | struct sock *s; |
| 148 | read_lock(&l->lock); |
| 149 | s = __l2cap_get_chan_by_ident(l, ident); |
| 150 | if (s) bh_lock_sock(s); |
| 151 | read_unlock(&l->lock); |
| 152 | return s; |
| 153 | } |
| 154 | |
| 155 | static u16 l2cap_alloc_cid(struct l2cap_chan_list *l) |
| 156 | { |
| 157 | u16 cid = 0x0040; |
| 158 | |
| 159 | for (; cid < 0xffff; cid++) { |
| 160 | if(!__l2cap_get_chan_by_scid(l, cid)) |
| 161 | return cid; |
| 162 | } |
| 163 | |
| 164 | return 0; |
| 165 | } |
| 166 | |
| 167 | static inline void __l2cap_chan_link(struct l2cap_chan_list *l, struct sock *sk) |
| 168 | { |
| 169 | sock_hold(sk); |
| 170 | |
| 171 | if (l->head) |
| 172 | l2cap_pi(l->head)->prev_c = sk; |
| 173 | |
| 174 | l2cap_pi(sk)->next_c = l->head; |
| 175 | l2cap_pi(sk)->prev_c = NULL; |
| 176 | l->head = sk; |
| 177 | } |
| 178 | |
| 179 | static inline void l2cap_chan_unlink(struct l2cap_chan_list *l, struct sock *sk) |
| 180 | { |
| 181 | struct sock *next = l2cap_pi(sk)->next_c, *prev = l2cap_pi(sk)->prev_c; |
| 182 | |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 183 | write_lock_bh(&l->lock); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 184 | if (sk == l->head) |
| 185 | l->head = next; |
| 186 | |
| 187 | if (next) |
| 188 | l2cap_pi(next)->prev_c = prev; |
| 189 | if (prev) |
| 190 | l2cap_pi(prev)->next_c = next; |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 191 | write_unlock_bh(&l->lock); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 192 | |
| 193 | __sock_put(sk); |
| 194 | } |
| 195 | |
| 196 | static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) |
| 197 | { |
| 198 | struct l2cap_chan_list *l = &conn->chan_list; |
| 199 | |
| 200 | BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, l2cap_pi(sk)->psm, l2cap_pi(sk)->dcid); |
| 201 | |
| 202 | l2cap_pi(sk)->conn = conn; |
| 203 | |
| 204 | if (sk->sk_type == SOCK_SEQPACKET) { |
| 205 | /* Alloc CID for connection-oriented socket */ |
| 206 | l2cap_pi(sk)->scid = l2cap_alloc_cid(l); |
| 207 | } else if (sk->sk_type == SOCK_DGRAM) { |
| 208 | /* Connectionless socket */ |
| 209 | l2cap_pi(sk)->scid = 0x0002; |
| 210 | l2cap_pi(sk)->dcid = 0x0002; |
| 211 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; |
| 212 | } else { |
| 213 | /* Raw socket can send/recv signalling messages only */ |
| 214 | l2cap_pi(sk)->scid = 0x0001; |
| 215 | l2cap_pi(sk)->dcid = 0x0001; |
| 216 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; |
| 217 | } |
| 218 | |
| 219 | __l2cap_chan_link(l, sk); |
| 220 | |
| 221 | if (parent) |
| 222 | bt_accept_enqueue(parent, sk); |
| 223 | } |
| 224 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 225 | /* Delete channel. |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 226 | * Must be called on the locked socket. */ |
| 227 | static void l2cap_chan_del(struct sock *sk, int err) |
| 228 | { |
| 229 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 230 | struct sock *parent = bt_sk(sk)->parent; |
| 231 | |
| 232 | l2cap_sock_clear_timer(sk); |
| 233 | |
| 234 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); |
| 235 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 236 | if (conn) { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 237 | /* Unlink from channel list */ |
| 238 | l2cap_chan_unlink(&conn->chan_list, sk); |
| 239 | l2cap_pi(sk)->conn = NULL; |
| 240 | hci_conn_put(conn->hcon); |
| 241 | } |
| 242 | |
| 243 | sk->sk_state = BT_CLOSED; |
| 244 | sock_set_flag(sk, SOCK_ZAPPED); |
| 245 | |
| 246 | if (err) |
| 247 | sk->sk_err = err; |
| 248 | |
| 249 | if (parent) { |
| 250 | bt_accept_unlink(sk); |
| 251 | parent->sk_data_ready(parent, 0); |
| 252 | } else |
| 253 | sk->sk_state_change(sk); |
| 254 | } |
| 255 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 256 | static inline u8 l2cap_get_ident(struct l2cap_conn *conn) |
| 257 | { |
| 258 | u8 id; |
| 259 | |
| 260 | /* Get next available identificator. |
| 261 | * 1 - 128 are used by kernel. |
| 262 | * 129 - 199 are reserved. |
| 263 | * 200 - 254 are used by utilities like l2ping, etc. |
| 264 | */ |
| 265 | |
| 266 | spin_lock_bh(&conn->lock); |
| 267 | |
| 268 | if (++conn->tx_ident > 128) |
| 269 | conn->tx_ident = 1; |
| 270 | |
| 271 | id = conn->tx_ident; |
| 272 | |
| 273 | spin_unlock_bh(&conn->lock); |
| 274 | |
| 275 | return id; |
| 276 | } |
| 277 | |
| 278 | static inline int l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, void *data) |
| 279 | { |
| 280 | struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); |
| 281 | |
| 282 | BT_DBG("code 0x%2.2x", code); |
| 283 | |
| 284 | if (!skb) |
| 285 | return -ENOMEM; |
| 286 | |
| 287 | return hci_send_acl(conn->hcon, skb, 0); |
| 288 | } |
| 289 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | /* ---- L2CAP connections ---- */ |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 291 | static void l2cap_conn_start(struct l2cap_conn *conn) |
| 292 | { |
| 293 | struct l2cap_chan_list *l = &conn->chan_list; |
| 294 | struct sock *sk; |
| 295 | |
| 296 | BT_DBG("conn %p", conn); |
| 297 | |
| 298 | read_lock(&l->lock); |
| 299 | |
| 300 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
| 301 | bh_lock_sock(sk); |
| 302 | |
| 303 | if (sk->sk_type != SOCK_SEQPACKET) { |
| 304 | l2cap_sock_clear_timer(sk); |
| 305 | sk->sk_state = BT_CONNECTED; |
| 306 | sk->sk_state_change(sk); |
| 307 | } else if (sk->sk_state == BT_CONNECT) { |
| 308 | struct l2cap_conn_req req; |
| 309 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
| 310 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 311 | req.psm = l2cap_pi(sk)->psm; |
| 312 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
| 313 | L2CAP_CONN_REQ, sizeof(req), &req); |
| 314 | } |
| 315 | |
| 316 | bh_unlock_sock(sk); |
| 317 | } |
| 318 | |
| 319 | read_unlock(&l->lock); |
| 320 | } |
| 321 | |
| 322 | static void l2cap_conn_ready(struct l2cap_conn *conn) |
| 323 | { |
| 324 | BT_DBG("conn %p", conn); |
| 325 | |
| 326 | if (conn->chan_list.head || !hlist_empty(&l2cap_sk_list.head)) { |
| 327 | struct l2cap_info_req req; |
| 328 | |
| 329 | req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 330 | |
| 331 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; |
| 332 | conn->info_ident = l2cap_get_ident(conn); |
| 333 | |
| 334 | mod_timer(&conn->info_timer, |
| 335 | jiffies + msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); |
| 336 | |
| 337 | l2cap_send_cmd(conn, conn->info_ident, |
| 338 | L2CAP_INFO_REQ, sizeof(req), &req); |
| 339 | } |
| 340 | } |
| 341 | |
| 342 | /* Notify sockets that we cannot guaranty reliability anymore */ |
| 343 | static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) |
| 344 | { |
| 345 | struct l2cap_chan_list *l = &conn->chan_list; |
| 346 | struct sock *sk; |
| 347 | |
| 348 | BT_DBG("conn %p", conn); |
| 349 | |
| 350 | read_lock(&l->lock); |
| 351 | |
| 352 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
| 353 | if (l2cap_pi(sk)->link_mode & L2CAP_LM_RELIABLE) |
| 354 | sk->sk_err = err; |
| 355 | } |
| 356 | |
| 357 | read_unlock(&l->lock); |
| 358 | } |
| 359 | |
| 360 | static void l2cap_info_timeout(unsigned long arg) |
| 361 | { |
| 362 | struct l2cap_conn *conn = (void *) arg; |
| 363 | |
| 364 | conn->info_ident = 0; |
| 365 | |
| 366 | l2cap_conn_start(conn); |
| 367 | } |
| 368 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) |
| 370 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 371 | struct l2cap_conn *conn = hcon->l2cap_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 373 | if (conn || status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | return conn; |
| 375 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 376 | conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC); |
| 377 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | |
| 380 | hcon->l2cap_data = conn; |
| 381 | conn->hcon = hcon; |
| 382 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 383 | BT_DBG("hcon %p conn %p", hcon, conn); |
| 384 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | conn->mtu = hcon->hdev->acl_mtu; |
| 386 | conn->src = &hcon->hdev->bdaddr; |
| 387 | conn->dst = &hcon->dst; |
| 388 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 389 | conn->feat_mask = 0; |
| 390 | |
Pavel Emelyanov | b24b8a2 | 2008-01-23 21:20:07 -0800 | [diff] [blame] | 391 | setup_timer(&conn->info_timer, l2cap_info_timeout, (unsigned long)conn); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 392 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | spin_lock_init(&conn->lock); |
| 394 | rwlock_init(&conn->chan_list.lock); |
| 395 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | return conn; |
| 397 | } |
| 398 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 399 | static void l2cap_conn_del(struct hci_conn *hcon, int err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 401 | struct l2cap_conn *conn = hcon->l2cap_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | struct sock *sk; |
| 403 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 404 | if (!conn) |
| 405 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | |
| 407 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); |
| 408 | |
| 409 | if (conn->rx_skb) |
| 410 | kfree_skb(conn->rx_skb); |
| 411 | |
| 412 | /* Kill channels */ |
| 413 | while ((sk = conn->chan_list.head)) { |
| 414 | bh_lock_sock(sk); |
| 415 | l2cap_chan_del(sk, err); |
| 416 | bh_unlock_sock(sk); |
| 417 | l2cap_sock_kill(sk); |
| 418 | } |
| 419 | |
Thomas Gleixner | 3ab2273 | 2008-02-26 17:42:56 -0800 | [diff] [blame^] | 420 | del_timer_sync(&conn->info_timer); |
| 421 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | hcon->l2cap_data = NULL; |
| 423 | kfree(conn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | } |
| 425 | |
| 426 | static inline void l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) |
| 427 | { |
| 428 | struct l2cap_chan_list *l = &conn->chan_list; |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 429 | write_lock_bh(&l->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | __l2cap_chan_add(conn, sk, parent); |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 431 | write_unlock_bh(&l->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | } |
| 433 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | /* ---- Socket interface ---- */ |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 435 | 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] | 436 | { |
| 437 | struct sock *sk; |
| 438 | struct hlist_node *node; |
| 439 | sk_for_each(sk, node, &l2cap_sk_list.head) |
| 440 | if (l2cap_pi(sk)->sport == psm && !bacmp(&bt_sk(sk)->src, src)) |
| 441 | goto found; |
| 442 | sk = NULL; |
| 443 | found: |
| 444 | return sk; |
| 445 | } |
| 446 | |
| 447 | /* Find socket with psm and source bdaddr. |
| 448 | * Returns closest match. |
| 449 | */ |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 450 | 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] | 451 | { |
| 452 | struct sock *sk = NULL, *sk1 = NULL; |
| 453 | struct hlist_node *node; |
| 454 | |
| 455 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
| 456 | if (state && sk->sk_state != state) |
| 457 | continue; |
| 458 | |
| 459 | if (l2cap_pi(sk)->psm == psm) { |
| 460 | /* Exact match. */ |
| 461 | if (!bacmp(&bt_sk(sk)->src, src)) |
| 462 | break; |
| 463 | |
| 464 | /* Closest match */ |
| 465 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) |
| 466 | sk1 = sk; |
| 467 | } |
| 468 | } |
| 469 | return node ? sk : sk1; |
| 470 | } |
| 471 | |
| 472 | /* Find socket with given address (psm, src). |
| 473 | * Returns locked socket */ |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 474 | 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] | 475 | { |
| 476 | struct sock *s; |
| 477 | read_lock(&l2cap_sk_list.lock); |
| 478 | s = __l2cap_get_sock_by_psm(state, psm, src); |
| 479 | if (s) bh_lock_sock(s); |
| 480 | read_unlock(&l2cap_sk_list.lock); |
| 481 | return s; |
| 482 | } |
| 483 | |
| 484 | static void l2cap_sock_destruct(struct sock *sk) |
| 485 | { |
| 486 | BT_DBG("sk %p", sk); |
| 487 | |
| 488 | skb_queue_purge(&sk->sk_receive_queue); |
| 489 | skb_queue_purge(&sk->sk_write_queue); |
| 490 | } |
| 491 | |
| 492 | static void l2cap_sock_cleanup_listen(struct sock *parent) |
| 493 | { |
| 494 | struct sock *sk; |
| 495 | |
| 496 | BT_DBG("parent %p", parent); |
| 497 | |
| 498 | /* Close not yet accepted channels */ |
| 499 | while ((sk = bt_accept_dequeue(parent, NULL))) |
| 500 | l2cap_sock_close(sk); |
| 501 | |
| 502 | parent->sk_state = BT_CLOSED; |
| 503 | sock_set_flag(parent, SOCK_ZAPPED); |
| 504 | } |
| 505 | |
| 506 | /* Kill socket (only if zapped and orphan) |
| 507 | * Must be called on unlocked socket. |
| 508 | */ |
| 509 | static void l2cap_sock_kill(struct sock *sk) |
| 510 | { |
| 511 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) |
| 512 | return; |
| 513 | |
| 514 | BT_DBG("sk %p state %d", sk, sk->sk_state); |
| 515 | |
| 516 | /* Kill poor orphan */ |
| 517 | bt_sock_unlink(&l2cap_sk_list, sk); |
| 518 | sock_set_flag(sk, SOCK_DEAD); |
| 519 | sock_put(sk); |
| 520 | } |
| 521 | |
| 522 | static void __l2cap_sock_close(struct sock *sk, int reason) |
| 523 | { |
| 524 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); |
| 525 | |
| 526 | switch (sk->sk_state) { |
| 527 | case BT_LISTEN: |
| 528 | l2cap_sock_cleanup_listen(sk); |
| 529 | break; |
| 530 | |
| 531 | case BT_CONNECTED: |
| 532 | case BT_CONFIG: |
| 533 | case BT_CONNECT2: |
| 534 | if (sk->sk_type == SOCK_SEQPACKET) { |
| 535 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 536 | struct l2cap_disconn_req req; |
| 537 | |
| 538 | sk->sk_state = BT_DISCONN; |
| 539 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); |
| 540 | |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 541 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 542 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
| 544 | L2CAP_DISCONN_REQ, sizeof(req), &req); |
| 545 | } else { |
| 546 | l2cap_chan_del(sk, reason); |
| 547 | } |
| 548 | break; |
| 549 | |
| 550 | case BT_CONNECT: |
| 551 | case BT_DISCONN: |
| 552 | l2cap_chan_del(sk, reason); |
| 553 | break; |
| 554 | |
| 555 | default: |
| 556 | sock_set_flag(sk, SOCK_ZAPPED); |
| 557 | break; |
| 558 | } |
| 559 | } |
| 560 | |
| 561 | /* Must be called on unlocked socket. */ |
| 562 | static void l2cap_sock_close(struct sock *sk) |
| 563 | { |
| 564 | l2cap_sock_clear_timer(sk); |
| 565 | lock_sock(sk); |
| 566 | __l2cap_sock_close(sk, ECONNRESET); |
| 567 | release_sock(sk); |
| 568 | l2cap_sock_kill(sk); |
| 569 | } |
| 570 | |
| 571 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) |
| 572 | { |
| 573 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 574 | |
| 575 | BT_DBG("sk %p", sk); |
| 576 | |
| 577 | if (parent) { |
| 578 | sk->sk_type = parent->sk_type; |
| 579 | pi->imtu = l2cap_pi(parent)->imtu; |
| 580 | pi->omtu = l2cap_pi(parent)->omtu; |
| 581 | pi->link_mode = l2cap_pi(parent)->link_mode; |
| 582 | } else { |
| 583 | pi->imtu = L2CAP_DEFAULT_MTU; |
| 584 | pi->omtu = 0; |
| 585 | pi->link_mode = 0; |
| 586 | } |
| 587 | |
| 588 | /* Default config options */ |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 589 | pi->conf_len = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | pi->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
| 591 | } |
| 592 | |
| 593 | static struct proto l2cap_proto = { |
| 594 | .name = "L2CAP", |
| 595 | .owner = THIS_MODULE, |
| 596 | .obj_size = sizeof(struct l2cap_pinfo) |
| 597 | }; |
| 598 | |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 599 | 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] | 600 | { |
| 601 | struct sock *sk; |
| 602 | |
Pavel Emelyanov | 6257ff2 | 2007-11-01 00:39:31 -0700 | [diff] [blame] | 603 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | if (!sk) |
| 605 | return NULL; |
| 606 | |
| 607 | sock_init_data(sock, sk); |
| 608 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); |
| 609 | |
| 610 | sk->sk_destruct = l2cap_sock_destruct; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 611 | sk->sk_sndtimeo = msecs_to_jiffies(L2CAP_CONN_TIMEOUT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | |
| 613 | sock_reset_flag(sk, SOCK_ZAPPED); |
| 614 | |
| 615 | sk->sk_protocol = proto; |
| 616 | sk->sk_state = BT_OPEN; |
| 617 | |
Pavel Emelyanov | b24b8a2 | 2008-01-23 21:20:07 -0800 | [diff] [blame] | 618 | setup_timer(&sk->sk_timer, l2cap_sock_timeout, (unsigned long)sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | |
| 620 | bt_sock_link(&l2cap_sk_list, sk); |
| 621 | return sk; |
| 622 | } |
| 623 | |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 624 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | { |
| 626 | struct sock *sk; |
| 627 | |
| 628 | BT_DBG("sock %p", sock); |
| 629 | |
| 630 | sock->state = SS_UNCONNECTED; |
| 631 | |
| 632 | if (sock->type != SOCK_SEQPACKET && |
| 633 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) |
| 634 | return -ESOCKTNOSUPPORT; |
| 635 | |
| 636 | if (sock->type == SOCK_RAW && !capable(CAP_NET_RAW)) |
| 637 | return -EPERM; |
| 638 | |
| 639 | sock->ops = &l2cap_sock_ops; |
| 640 | |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 641 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | if (!sk) |
| 643 | return -ENOMEM; |
| 644 | |
| 645 | l2cap_sock_init(sk, NULL); |
| 646 | return 0; |
| 647 | } |
| 648 | |
| 649 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) |
| 650 | { |
| 651 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; |
| 652 | struct sock *sk = sock->sk; |
| 653 | int err = 0; |
| 654 | |
| 655 | BT_DBG("sk %p, %s %d", sk, batostr(&la->l2_bdaddr), la->l2_psm); |
| 656 | |
| 657 | if (!addr || addr->sa_family != AF_BLUETOOTH) |
| 658 | return -EINVAL; |
| 659 | |
| 660 | lock_sock(sk); |
| 661 | |
| 662 | if (sk->sk_state != BT_OPEN) { |
| 663 | err = -EBADFD; |
| 664 | goto done; |
| 665 | } |
| 666 | |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 667 | if (la->l2_psm && btohs(la->l2_psm) < 0x1001 && |
Marcel Holtmann | 847641d | 2007-01-22 22:00:45 +0100 | [diff] [blame] | 668 | !capable(CAP_NET_BIND_SERVICE)) { |
| 669 | err = -EACCES; |
| 670 | goto done; |
| 671 | } |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 672 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | write_lock_bh(&l2cap_sk_list.lock); |
| 674 | |
| 675 | if (la->l2_psm && __l2cap_get_sock_by_addr(la->l2_psm, &la->l2_bdaddr)) { |
| 676 | err = -EADDRINUSE; |
| 677 | } else { |
| 678 | /* Save source address */ |
| 679 | bacpy(&bt_sk(sk)->src, &la->l2_bdaddr); |
| 680 | l2cap_pi(sk)->psm = la->l2_psm; |
| 681 | l2cap_pi(sk)->sport = la->l2_psm; |
| 682 | sk->sk_state = BT_BOUND; |
| 683 | } |
| 684 | |
| 685 | write_unlock_bh(&l2cap_sk_list.lock); |
| 686 | |
| 687 | done: |
| 688 | release_sock(sk); |
| 689 | return err; |
| 690 | } |
| 691 | |
| 692 | static int l2cap_do_connect(struct sock *sk) |
| 693 | { |
| 694 | bdaddr_t *src = &bt_sk(sk)->src; |
| 695 | bdaddr_t *dst = &bt_sk(sk)->dst; |
| 696 | struct l2cap_conn *conn; |
| 697 | struct hci_conn *hcon; |
| 698 | struct hci_dev *hdev; |
| 699 | int err = 0; |
| 700 | |
| 701 | BT_DBG("%s -> %s psm 0x%2.2x", batostr(src), batostr(dst), l2cap_pi(sk)->psm); |
| 702 | |
| 703 | if (!(hdev = hci_get_route(dst, src))) |
| 704 | return -EHOSTUNREACH; |
| 705 | |
| 706 | hci_dev_lock_bh(hdev); |
| 707 | |
| 708 | err = -ENOMEM; |
| 709 | |
| 710 | hcon = hci_connect(hdev, ACL_LINK, dst); |
| 711 | if (!hcon) |
| 712 | goto done; |
| 713 | |
| 714 | conn = l2cap_conn_add(hcon, 0); |
| 715 | if (!conn) { |
| 716 | hci_conn_put(hcon); |
| 717 | goto done; |
| 718 | } |
| 719 | |
| 720 | err = 0; |
| 721 | |
| 722 | /* Update source addr of the socket */ |
| 723 | bacpy(src, conn->src); |
| 724 | |
| 725 | l2cap_chan_add(conn, sk, NULL); |
| 726 | |
| 727 | sk->sk_state = BT_CONNECT; |
| 728 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); |
| 729 | |
| 730 | if (hcon->state == BT_CONNECTED) { |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 731 | if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT)) { |
| 732 | l2cap_conn_ready(conn); |
| 733 | goto done; |
| 734 | } |
| 735 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | if (sk->sk_type == SOCK_SEQPACKET) { |
| 737 | struct l2cap_conn_req req; |
| 738 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 739 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | req.psm = l2cap_pi(sk)->psm; |
| 741 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
| 742 | L2CAP_CONN_REQ, sizeof(req), &req); |
| 743 | } else { |
| 744 | l2cap_sock_clear_timer(sk); |
| 745 | sk->sk_state = BT_CONNECTED; |
| 746 | } |
| 747 | } |
| 748 | |
| 749 | done: |
| 750 | hci_dev_unlock_bh(hdev); |
| 751 | hci_dev_put(hdev); |
| 752 | return err; |
| 753 | } |
| 754 | |
| 755 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) |
| 756 | { |
| 757 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; |
| 758 | struct sock *sk = sock->sk; |
| 759 | int err = 0; |
| 760 | |
| 761 | lock_sock(sk); |
| 762 | |
| 763 | BT_DBG("sk %p", sk); |
| 764 | |
| 765 | if (addr->sa_family != AF_BLUETOOTH || alen < sizeof(struct sockaddr_l2)) { |
| 766 | err = -EINVAL; |
| 767 | goto done; |
| 768 | } |
| 769 | |
| 770 | if (sk->sk_type == SOCK_SEQPACKET && !la->l2_psm) { |
| 771 | err = -EINVAL; |
| 772 | goto done; |
| 773 | } |
| 774 | |
| 775 | switch(sk->sk_state) { |
| 776 | case BT_CONNECT: |
| 777 | case BT_CONNECT2: |
| 778 | case BT_CONFIG: |
| 779 | /* Already connecting */ |
| 780 | goto wait; |
| 781 | |
| 782 | case BT_CONNECTED: |
| 783 | /* Already connected */ |
| 784 | goto done; |
| 785 | |
| 786 | case BT_OPEN: |
| 787 | case BT_BOUND: |
| 788 | /* Can connect */ |
| 789 | break; |
| 790 | |
| 791 | default: |
| 792 | err = -EBADFD; |
| 793 | goto done; |
| 794 | } |
| 795 | |
| 796 | /* Set destination address and psm */ |
| 797 | bacpy(&bt_sk(sk)->dst, &la->l2_bdaddr); |
| 798 | l2cap_pi(sk)->psm = la->l2_psm; |
| 799 | |
| 800 | if ((err = l2cap_do_connect(sk))) |
| 801 | goto done; |
| 802 | |
| 803 | wait: |
| 804 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
| 805 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
| 806 | done: |
| 807 | release_sock(sk); |
| 808 | return err; |
| 809 | } |
| 810 | |
| 811 | static int l2cap_sock_listen(struct socket *sock, int backlog) |
| 812 | { |
| 813 | struct sock *sk = sock->sk; |
| 814 | int err = 0; |
| 815 | |
| 816 | BT_DBG("sk %p backlog %d", sk, backlog); |
| 817 | |
| 818 | lock_sock(sk); |
| 819 | |
| 820 | if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) { |
| 821 | err = -EBADFD; |
| 822 | goto done; |
| 823 | } |
| 824 | |
| 825 | if (!l2cap_pi(sk)->psm) { |
| 826 | bdaddr_t *src = &bt_sk(sk)->src; |
| 827 | u16 psm; |
| 828 | |
| 829 | err = -EINVAL; |
| 830 | |
| 831 | write_lock_bh(&l2cap_sk_list.lock); |
| 832 | |
| 833 | for (psm = 0x1001; psm < 0x1100; psm += 2) |
Al Viro | 6dc0c20 | 2007-07-29 00:15:18 -0700 | [diff] [blame] | 834 | if (!__l2cap_get_sock_by_addr(htobs(psm), src)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | l2cap_pi(sk)->psm = htobs(psm); |
| 836 | l2cap_pi(sk)->sport = htobs(psm); |
| 837 | err = 0; |
| 838 | break; |
| 839 | } |
| 840 | |
| 841 | write_unlock_bh(&l2cap_sk_list.lock); |
| 842 | |
| 843 | if (err < 0) |
| 844 | goto done; |
| 845 | } |
| 846 | |
| 847 | sk->sk_max_ack_backlog = backlog; |
| 848 | sk->sk_ack_backlog = 0; |
| 849 | sk->sk_state = BT_LISTEN; |
| 850 | |
| 851 | done: |
| 852 | release_sock(sk); |
| 853 | return err; |
| 854 | } |
| 855 | |
| 856 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) |
| 857 | { |
| 858 | DECLARE_WAITQUEUE(wait, current); |
| 859 | struct sock *sk = sock->sk, *nsk; |
| 860 | long timeo; |
| 861 | int err = 0; |
| 862 | |
Peter Zijlstra | fcc70d5 | 2006-11-08 22:44:35 -0800 | [diff] [blame] | 863 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | |
| 865 | if (sk->sk_state != BT_LISTEN) { |
| 866 | err = -EBADFD; |
| 867 | goto done; |
| 868 | } |
| 869 | |
| 870 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
| 871 | |
| 872 | BT_DBG("sk %p timeo %ld", sk, timeo); |
| 873 | |
| 874 | /* Wait for an incoming connection. (wake-one). */ |
| 875 | add_wait_queue_exclusive(sk->sk_sleep, &wait); |
| 876 | while (!(nsk = bt_accept_dequeue(sk, newsock))) { |
| 877 | set_current_state(TASK_INTERRUPTIBLE); |
| 878 | if (!timeo) { |
| 879 | err = -EAGAIN; |
| 880 | break; |
| 881 | } |
| 882 | |
| 883 | release_sock(sk); |
| 884 | timeo = schedule_timeout(timeo); |
Peter Zijlstra | fcc70d5 | 2006-11-08 22:44:35 -0800 | [diff] [blame] | 885 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | |
| 887 | if (sk->sk_state != BT_LISTEN) { |
| 888 | err = -EBADFD; |
| 889 | break; |
| 890 | } |
| 891 | |
| 892 | if (signal_pending(current)) { |
| 893 | err = sock_intr_errno(timeo); |
| 894 | break; |
| 895 | } |
| 896 | } |
| 897 | set_current_state(TASK_RUNNING); |
| 898 | remove_wait_queue(sk->sk_sleep, &wait); |
| 899 | |
| 900 | if (err) |
| 901 | goto done; |
| 902 | |
| 903 | newsock->state = SS_CONNECTED; |
| 904 | |
| 905 | BT_DBG("new socket %p", nsk); |
| 906 | |
| 907 | done: |
| 908 | release_sock(sk); |
| 909 | return err; |
| 910 | } |
| 911 | |
| 912 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) |
| 913 | { |
| 914 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; |
| 915 | struct sock *sk = sock->sk; |
| 916 | |
| 917 | BT_DBG("sock %p, sk %p", sock, sk); |
| 918 | |
| 919 | addr->sa_family = AF_BLUETOOTH; |
| 920 | *len = sizeof(struct sockaddr_l2); |
| 921 | |
| 922 | if (peer) |
| 923 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); |
| 924 | else |
| 925 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); |
| 926 | |
| 927 | la->l2_psm = l2cap_pi(sk)->psm; |
| 928 | return 0; |
| 929 | } |
| 930 | |
| 931 | static inline int l2cap_do_send(struct sock *sk, struct msghdr *msg, int len) |
| 932 | { |
| 933 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 934 | struct sk_buff *skb, **frag; |
| 935 | int err, hlen, count, sent=0; |
| 936 | struct l2cap_hdr *lh; |
| 937 | |
| 938 | BT_DBG("sk %p len %d", sk, len); |
| 939 | |
| 940 | /* First fragment (with L2CAP header) */ |
| 941 | if (sk->sk_type == SOCK_DGRAM) |
| 942 | hlen = L2CAP_HDR_SIZE + 2; |
| 943 | else |
| 944 | hlen = L2CAP_HDR_SIZE; |
| 945 | |
| 946 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
| 947 | |
| 948 | skb = bt_skb_send_alloc(sk, hlen + count, |
| 949 | msg->msg_flags & MSG_DONTWAIT, &err); |
| 950 | if (!skb) |
| 951 | return err; |
| 952 | |
| 953 | /* Create L2CAP header */ |
| 954 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 955 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 956 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | |
| 958 | if (sk->sk_type == SOCK_DGRAM) |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 959 | put_unaligned(l2cap_pi(sk)->psm, (__le16 *) skb_put(skb, 2)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | |
| 961 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) { |
| 962 | err = -EFAULT; |
| 963 | goto fail; |
| 964 | } |
| 965 | |
| 966 | sent += count; |
| 967 | len -= count; |
| 968 | |
| 969 | /* Continuation fragments (no L2CAP header) */ |
| 970 | frag = &skb_shinfo(skb)->frag_list; |
| 971 | while (len) { |
| 972 | count = min_t(unsigned int, conn->mtu, len); |
| 973 | |
| 974 | *frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err); |
| 975 | if (!*frag) |
| 976 | goto fail; |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 977 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) { |
| 979 | err = -EFAULT; |
| 980 | goto fail; |
| 981 | } |
| 982 | |
| 983 | sent += count; |
| 984 | len -= count; |
| 985 | |
| 986 | frag = &(*frag)->next; |
| 987 | } |
| 988 | |
| 989 | if ((err = hci_send_acl(conn->hcon, skb, 0)) < 0) |
| 990 | goto fail; |
| 991 | |
| 992 | return sent; |
| 993 | |
| 994 | fail: |
| 995 | kfree_skb(skb); |
| 996 | return err; |
| 997 | } |
| 998 | |
| 999 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) |
| 1000 | { |
| 1001 | struct sock *sk = sock->sk; |
| 1002 | int err = 0; |
| 1003 | |
| 1004 | BT_DBG("sock %p, sk %p", sock, sk); |
| 1005 | |
Benjamin LaHaise | c1cbe4b | 2005-12-13 23:22:19 -0800 | [diff] [blame] | 1006 | err = sock_error(sk); |
| 1007 | if (err) |
| 1008 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | |
| 1010 | if (msg->msg_flags & MSG_OOB) |
| 1011 | return -EOPNOTSUPP; |
| 1012 | |
| 1013 | /* Check outgoing MTU */ |
| 1014 | if (sk->sk_type != SOCK_RAW && len > l2cap_pi(sk)->omtu) |
| 1015 | return -EINVAL; |
| 1016 | |
| 1017 | lock_sock(sk); |
| 1018 | |
| 1019 | if (sk->sk_state == BT_CONNECTED) |
| 1020 | err = l2cap_do_send(sk, msg, len); |
| 1021 | else |
| 1022 | err = -ENOTCONN; |
| 1023 | |
| 1024 | release_sock(sk); |
| 1025 | return err; |
| 1026 | } |
| 1027 | |
| 1028 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen) |
| 1029 | { |
| 1030 | struct sock *sk = sock->sk; |
| 1031 | struct l2cap_options opts; |
| 1032 | int err = 0, len; |
| 1033 | u32 opt; |
| 1034 | |
| 1035 | BT_DBG("sk %p", sk); |
| 1036 | |
| 1037 | lock_sock(sk); |
| 1038 | |
| 1039 | switch (optname) { |
| 1040 | case L2CAP_OPTIONS: |
Marcel Holtmann | 0878b66 | 2007-05-05 00:35:59 +0200 | [diff] [blame] | 1041 | opts.imtu = l2cap_pi(sk)->imtu; |
| 1042 | opts.omtu = l2cap_pi(sk)->omtu; |
| 1043 | opts.flush_to = l2cap_pi(sk)->flush_to; |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 1044 | opts.mode = L2CAP_MODE_BASIC; |
Marcel Holtmann | 0878b66 | 2007-05-05 00:35:59 +0200 | [diff] [blame] | 1045 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | len = min_t(unsigned int, sizeof(opts), optlen); |
| 1047 | if (copy_from_user((char *) &opts, optval, len)) { |
| 1048 | err = -EFAULT; |
| 1049 | break; |
| 1050 | } |
Marcel Holtmann | 0878b66 | 2007-05-05 00:35:59 +0200 | [diff] [blame] | 1051 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | l2cap_pi(sk)->imtu = opts.imtu; |
| 1053 | l2cap_pi(sk)->omtu = opts.omtu; |
| 1054 | break; |
| 1055 | |
| 1056 | case L2CAP_LM: |
| 1057 | if (get_user(opt, (u32 __user *) optval)) { |
| 1058 | err = -EFAULT; |
| 1059 | break; |
| 1060 | } |
| 1061 | |
| 1062 | l2cap_pi(sk)->link_mode = opt; |
| 1063 | break; |
| 1064 | |
| 1065 | default: |
| 1066 | err = -ENOPROTOOPT; |
| 1067 | break; |
| 1068 | } |
| 1069 | |
| 1070 | release_sock(sk); |
| 1071 | return err; |
| 1072 | } |
| 1073 | |
| 1074 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
| 1075 | { |
| 1076 | struct sock *sk = sock->sk; |
| 1077 | struct l2cap_options opts; |
| 1078 | struct l2cap_conninfo cinfo; |
| 1079 | int len, err = 0; |
| 1080 | |
| 1081 | BT_DBG("sk %p", sk); |
| 1082 | |
| 1083 | if (get_user(len, optlen)) |
| 1084 | return -EFAULT; |
| 1085 | |
| 1086 | lock_sock(sk); |
| 1087 | |
| 1088 | switch (optname) { |
| 1089 | case L2CAP_OPTIONS: |
| 1090 | opts.imtu = l2cap_pi(sk)->imtu; |
| 1091 | opts.omtu = l2cap_pi(sk)->omtu; |
| 1092 | opts.flush_to = l2cap_pi(sk)->flush_to; |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 1093 | opts.mode = L2CAP_MODE_BASIC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | |
| 1095 | len = min_t(unsigned int, len, sizeof(opts)); |
| 1096 | if (copy_to_user(optval, (char *) &opts, len)) |
| 1097 | err = -EFAULT; |
| 1098 | |
| 1099 | break; |
| 1100 | |
| 1101 | case L2CAP_LM: |
| 1102 | if (put_user(l2cap_pi(sk)->link_mode, (u32 __user *) optval)) |
| 1103 | err = -EFAULT; |
| 1104 | break; |
| 1105 | |
| 1106 | case L2CAP_CONNINFO: |
| 1107 | if (sk->sk_state != BT_CONNECTED) { |
| 1108 | err = -ENOTCONN; |
| 1109 | break; |
| 1110 | } |
| 1111 | |
| 1112 | cinfo.hci_handle = l2cap_pi(sk)->conn->hcon->handle; |
| 1113 | memcpy(cinfo.dev_class, l2cap_pi(sk)->conn->hcon->dev_class, 3); |
| 1114 | |
| 1115 | len = min_t(unsigned int, len, sizeof(cinfo)); |
| 1116 | if (copy_to_user(optval, (char *) &cinfo, len)) |
| 1117 | err = -EFAULT; |
| 1118 | |
| 1119 | break; |
| 1120 | |
| 1121 | default: |
| 1122 | err = -ENOPROTOOPT; |
| 1123 | break; |
| 1124 | } |
| 1125 | |
| 1126 | release_sock(sk); |
| 1127 | return err; |
| 1128 | } |
| 1129 | |
| 1130 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
| 1131 | { |
| 1132 | struct sock *sk = sock->sk; |
| 1133 | int err = 0; |
| 1134 | |
| 1135 | BT_DBG("sock %p, sk %p", sock, sk); |
| 1136 | |
| 1137 | if (!sk) |
| 1138 | return 0; |
| 1139 | |
| 1140 | lock_sock(sk); |
| 1141 | if (!sk->sk_shutdown) { |
| 1142 | sk->sk_shutdown = SHUTDOWN_MASK; |
| 1143 | l2cap_sock_clear_timer(sk); |
| 1144 | __l2cap_sock_close(sk, 0); |
| 1145 | |
| 1146 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) |
| 1147 | err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime); |
| 1148 | } |
| 1149 | release_sock(sk); |
| 1150 | return err; |
| 1151 | } |
| 1152 | |
| 1153 | static int l2cap_sock_release(struct socket *sock) |
| 1154 | { |
| 1155 | struct sock *sk = sock->sk; |
| 1156 | int err; |
| 1157 | |
| 1158 | BT_DBG("sock %p, sk %p", sock, sk); |
| 1159 | |
| 1160 | if (!sk) |
| 1161 | return 0; |
| 1162 | |
| 1163 | err = l2cap_sock_shutdown(sock, 2); |
| 1164 | |
| 1165 | sock_orphan(sk); |
| 1166 | l2cap_sock_kill(sk); |
| 1167 | return err; |
| 1168 | } |
| 1169 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | static void l2cap_chan_ready(struct sock *sk) |
| 1171 | { |
| 1172 | struct sock *parent = bt_sk(sk)->parent; |
| 1173 | |
| 1174 | BT_DBG("sk %p, parent %p", sk, parent); |
| 1175 | |
| 1176 | l2cap_pi(sk)->conf_state = 0; |
| 1177 | l2cap_sock_clear_timer(sk); |
| 1178 | |
| 1179 | if (!parent) { |
| 1180 | /* Outgoing channel. |
| 1181 | * Wake up socket sleeping on connect. |
| 1182 | */ |
| 1183 | sk->sk_state = BT_CONNECTED; |
| 1184 | sk->sk_state_change(sk); |
| 1185 | } else { |
| 1186 | /* Incoming channel. |
| 1187 | * Wake up socket sleeping on accept. |
| 1188 | */ |
| 1189 | parent->sk_data_ready(parent, 0); |
| 1190 | } |
| 1191 | } |
| 1192 | |
| 1193 | /* Copy frame to all raw sockets on that connection */ |
| 1194 | static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) |
| 1195 | { |
| 1196 | struct l2cap_chan_list *l = &conn->chan_list; |
| 1197 | struct sk_buff *nskb; |
| 1198 | struct sock * sk; |
| 1199 | |
| 1200 | BT_DBG("conn %p", conn); |
| 1201 | |
| 1202 | read_lock(&l->lock); |
| 1203 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
| 1204 | if (sk->sk_type != SOCK_RAW) |
| 1205 | continue; |
| 1206 | |
| 1207 | /* Don't send frame to the socket it came from */ |
| 1208 | if (skb->sk == sk) |
| 1209 | continue; |
| 1210 | |
| 1211 | if (!(nskb = skb_clone(skb, GFP_ATOMIC))) |
| 1212 | continue; |
| 1213 | |
| 1214 | if (sock_queue_rcv_skb(sk, nskb)) |
| 1215 | kfree_skb(nskb); |
| 1216 | } |
| 1217 | read_unlock(&l->lock); |
| 1218 | } |
| 1219 | |
| 1220 | /* ---- L2CAP signalling commands ---- */ |
| 1221 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, |
| 1222 | u8 code, u8 ident, u16 dlen, void *data) |
| 1223 | { |
| 1224 | struct sk_buff *skb, **frag; |
| 1225 | struct l2cap_cmd_hdr *cmd; |
| 1226 | struct l2cap_hdr *lh; |
| 1227 | int len, count; |
| 1228 | |
| 1229 | BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", conn, code, ident, dlen); |
| 1230 | |
| 1231 | len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; |
| 1232 | count = min_t(unsigned int, conn->mtu, len); |
| 1233 | |
| 1234 | skb = bt_skb_alloc(count, GFP_ATOMIC); |
| 1235 | if (!skb) |
| 1236 | return NULL; |
| 1237 | |
| 1238 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1239 | lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); |
| 1240 | lh->cid = cpu_to_le16(0x0001); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | |
| 1242 | cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); |
| 1243 | cmd->code = code; |
| 1244 | cmd->ident = ident; |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1245 | cmd->len = cpu_to_le16(dlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1246 | |
| 1247 | if (dlen) { |
| 1248 | count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; |
| 1249 | memcpy(skb_put(skb, count), data, count); |
| 1250 | data += count; |
| 1251 | } |
| 1252 | |
| 1253 | len -= skb->len; |
| 1254 | |
| 1255 | /* Continuation fragments (no L2CAP header) */ |
| 1256 | frag = &skb_shinfo(skb)->frag_list; |
| 1257 | while (len) { |
| 1258 | count = min_t(unsigned int, conn->mtu, len); |
| 1259 | |
| 1260 | *frag = bt_skb_alloc(count, GFP_ATOMIC); |
| 1261 | if (!*frag) |
| 1262 | goto fail; |
| 1263 | |
| 1264 | memcpy(skb_put(*frag, count), data, count); |
| 1265 | |
| 1266 | len -= count; |
| 1267 | data += count; |
| 1268 | |
| 1269 | frag = &(*frag)->next; |
| 1270 | } |
| 1271 | |
| 1272 | return skb; |
| 1273 | |
| 1274 | fail: |
| 1275 | kfree_skb(skb); |
| 1276 | return NULL; |
| 1277 | } |
| 1278 | |
| 1279 | static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) |
| 1280 | { |
| 1281 | struct l2cap_conf_opt *opt = *ptr; |
| 1282 | int len; |
| 1283 | |
| 1284 | len = L2CAP_CONF_OPT_SIZE + opt->len; |
| 1285 | *ptr += len; |
| 1286 | |
| 1287 | *type = opt->type; |
| 1288 | *olen = opt->len; |
| 1289 | |
| 1290 | switch (opt->len) { |
| 1291 | case 1: |
| 1292 | *val = *((u8 *) opt->val); |
| 1293 | break; |
| 1294 | |
| 1295 | case 2: |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 1296 | *val = __le16_to_cpu(*((__le16 *) opt->val)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1297 | break; |
| 1298 | |
| 1299 | case 4: |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 1300 | *val = __le32_to_cpu(*((__le32 *) opt->val)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | break; |
| 1302 | |
| 1303 | default: |
| 1304 | *val = (unsigned long) opt->val; |
| 1305 | break; |
| 1306 | } |
| 1307 | |
| 1308 | BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val); |
| 1309 | return len; |
| 1310 | } |
| 1311 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1312 | static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) |
| 1313 | { |
| 1314 | struct l2cap_conf_opt *opt = *ptr; |
| 1315 | |
| 1316 | BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val); |
| 1317 | |
| 1318 | opt->type = type; |
| 1319 | opt->len = len; |
| 1320 | |
| 1321 | switch (len) { |
| 1322 | case 1: |
| 1323 | *((u8 *) opt->val) = val; |
| 1324 | break; |
| 1325 | |
| 1326 | case 2: |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 1327 | *((__le16 *) opt->val) = cpu_to_le16(val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1328 | break; |
| 1329 | |
| 1330 | case 4: |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 1331 | *((__le32 *) opt->val) = cpu_to_le32(val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1332 | break; |
| 1333 | |
| 1334 | default: |
| 1335 | memcpy(opt->val, (void *) val, len); |
| 1336 | break; |
| 1337 | } |
| 1338 | |
| 1339 | *ptr += L2CAP_CONF_OPT_SIZE + len; |
| 1340 | } |
| 1341 | |
| 1342 | static int l2cap_build_conf_req(struct sock *sk, void *data) |
| 1343 | { |
| 1344 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 1345 | struct l2cap_conf_req *req = data; |
| 1346 | void *ptr = req->data; |
| 1347 | |
| 1348 | BT_DBG("sk %p", sk); |
| 1349 | |
| 1350 | if (pi->imtu != L2CAP_DEFAULT_MTU) |
| 1351 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu); |
| 1352 | |
| 1353 | /* FIXME: Need actual value of the flush timeout */ |
| 1354 | //if (flush_to != L2CAP_DEFAULT_FLUSH_TO) |
| 1355 | // l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, 2, pi->flush_to); |
| 1356 | |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1357 | req->dcid = cpu_to_le16(pi->dcid); |
| 1358 | req->flags = cpu_to_le16(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | |
| 1360 | return ptr - data; |
| 1361 | } |
| 1362 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1363 | static int l2cap_parse_conf_req(struct sock *sk, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1364 | { |
| 1365 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1366 | struct l2cap_conf_rsp *rsp = data; |
| 1367 | void *ptr = rsp->data; |
| 1368 | void *req = pi->conf_req; |
| 1369 | int len = pi->conf_len; |
| 1370 | int type, hint, olen; |
| 1371 | unsigned long val; |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 1372 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 1373 | u16 mtu = L2CAP_DEFAULT_MTU; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1374 | u16 result = L2CAP_CONF_SUCCESS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1375 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1376 | BT_DBG("sk %p", sk); |
Marcel Holtmann | 820ae1b | 2006-11-18 22:15:00 +0100 | [diff] [blame] | 1377 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1378 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 1379 | len -= l2cap_get_conf_opt(&req, &type, &olen, &val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1380 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1381 | hint = type & 0x80; |
| 1382 | type &= 0x7f; |
| 1383 | |
| 1384 | switch (type) { |
| 1385 | case L2CAP_CONF_MTU: |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 1386 | mtu = val; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1387 | break; |
| 1388 | |
| 1389 | case L2CAP_CONF_FLUSH_TO: |
| 1390 | pi->flush_to = val; |
| 1391 | break; |
| 1392 | |
| 1393 | case L2CAP_CONF_QOS: |
| 1394 | break; |
| 1395 | |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 1396 | case L2CAP_CONF_RFC: |
| 1397 | if (olen == sizeof(rfc)) |
| 1398 | memcpy(&rfc, (void *) val, olen); |
| 1399 | break; |
| 1400 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1401 | default: |
| 1402 | if (hint) |
| 1403 | break; |
| 1404 | |
| 1405 | result = L2CAP_CONF_UNKNOWN; |
| 1406 | *((u8 *) ptr++) = type; |
| 1407 | break; |
| 1408 | } |
| 1409 | } |
| 1410 | |
| 1411 | if (result == L2CAP_CONF_SUCCESS) { |
| 1412 | /* Configure output options and let the other side know |
| 1413 | * which ones we don't like. */ |
| 1414 | |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 1415 | if (rfc.mode == L2CAP_MODE_BASIC) { |
| 1416 | if (mtu < pi->omtu) |
| 1417 | result = L2CAP_CONF_UNACCEPT; |
| 1418 | else { |
| 1419 | pi->omtu = mtu; |
| 1420 | pi->conf_state |= L2CAP_CONF_OUTPUT_DONE; |
| 1421 | } |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1422 | |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 1423 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); |
| 1424 | } else { |
| 1425 | result = L2CAP_CONF_UNACCEPT; |
| 1426 | |
| 1427 | memset(&rfc, 0, sizeof(rfc)); |
| 1428 | rfc.mode = L2CAP_MODE_BASIC; |
| 1429 | |
| 1430 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 1431 | sizeof(rfc), (unsigned long) &rfc); |
| 1432 | } |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1433 | } |
| 1434 | |
| 1435 | rsp->scid = cpu_to_le16(pi->dcid); |
| 1436 | rsp->result = cpu_to_le16(result); |
| 1437 | rsp->flags = cpu_to_le16(0x0000); |
| 1438 | |
| 1439 | return ptr - data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1440 | } |
| 1441 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1442 | 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] | 1443 | { |
| 1444 | struct l2cap_conf_rsp *rsp = data; |
| 1445 | void *ptr = rsp->data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1446 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1447 | BT_DBG("sk %p", sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1448 | |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1449 | rsp->scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1450 | rsp->result = cpu_to_le16(result); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1451 | rsp->flags = cpu_to_le16(flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1452 | |
| 1453 | return ptr - data; |
| 1454 | } |
| 1455 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1456 | static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 1457 | { |
| 1458 | struct l2cap_cmd_rej *rej = (struct l2cap_cmd_rej *) data; |
| 1459 | |
| 1460 | if (rej->reason != 0x0000) |
| 1461 | return 0; |
| 1462 | |
| 1463 | if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) && |
| 1464 | cmd->ident == conn->info_ident) { |
| 1465 | conn->info_ident = 0; |
| 1466 | del_timer(&conn->info_timer); |
| 1467 | l2cap_conn_start(conn); |
| 1468 | } |
| 1469 | |
| 1470 | return 0; |
| 1471 | } |
| 1472 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1473 | static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 1474 | { |
| 1475 | struct l2cap_chan_list *list = &conn->chan_list; |
| 1476 | struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; |
| 1477 | struct l2cap_conn_rsp rsp; |
| 1478 | struct sock *sk, *parent; |
| 1479 | int result = 0, status = 0; |
| 1480 | |
| 1481 | u16 dcid = 0, scid = __le16_to_cpu(req->scid); |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 1482 | __le16 psm = req->psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1483 | |
| 1484 | BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid); |
| 1485 | |
| 1486 | /* Check if we have socket listening on psm */ |
| 1487 | parent = l2cap_get_sock_by_psm(BT_LISTEN, psm, conn->src); |
| 1488 | if (!parent) { |
| 1489 | result = L2CAP_CR_BAD_PSM; |
| 1490 | goto sendresp; |
| 1491 | } |
| 1492 | |
| 1493 | result = L2CAP_CR_NO_MEM; |
| 1494 | |
| 1495 | /* Check for backlog size */ |
| 1496 | if (sk_acceptq_is_full(parent)) { |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 1497 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1498 | goto response; |
| 1499 | } |
| 1500 | |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 1501 | sk = l2cap_sock_alloc(parent->sk_net, NULL, BTPROTO_L2CAP, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1502 | if (!sk) |
| 1503 | goto response; |
| 1504 | |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 1505 | write_lock_bh(&list->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1506 | |
| 1507 | /* Check if we already have channel with that dcid */ |
| 1508 | if (__l2cap_get_chan_by_dcid(list, scid)) { |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 1509 | write_unlock_bh(&list->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1510 | sock_set_flag(sk, SOCK_ZAPPED); |
| 1511 | l2cap_sock_kill(sk); |
| 1512 | goto response; |
| 1513 | } |
| 1514 | |
| 1515 | hci_conn_hold(conn->hcon); |
| 1516 | |
| 1517 | l2cap_sock_init(sk, parent); |
| 1518 | bacpy(&bt_sk(sk)->src, conn->src); |
| 1519 | bacpy(&bt_sk(sk)->dst, conn->dst); |
| 1520 | l2cap_pi(sk)->psm = psm; |
| 1521 | l2cap_pi(sk)->dcid = scid; |
| 1522 | |
| 1523 | __l2cap_chan_add(conn, sk, parent); |
| 1524 | dcid = l2cap_pi(sk)->scid; |
| 1525 | |
| 1526 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); |
| 1527 | |
| 1528 | /* Service level security */ |
| 1529 | result = L2CAP_CR_PEND; |
| 1530 | status = L2CAP_CS_AUTHEN_PEND; |
| 1531 | sk->sk_state = BT_CONNECT2; |
| 1532 | l2cap_pi(sk)->ident = cmd->ident; |
| 1533 | |
| 1534 | if ((l2cap_pi(sk)->link_mode & L2CAP_LM_ENCRYPT) || |
| 1535 | (l2cap_pi(sk)->link_mode & L2CAP_LM_SECURE)) { |
| 1536 | if (!hci_conn_encrypt(conn->hcon)) |
| 1537 | goto done; |
| 1538 | } else if (l2cap_pi(sk)->link_mode & L2CAP_LM_AUTH) { |
| 1539 | if (!hci_conn_auth(conn->hcon)) |
| 1540 | goto done; |
| 1541 | } |
| 1542 | |
| 1543 | sk->sk_state = BT_CONFIG; |
| 1544 | result = status = 0; |
| 1545 | |
| 1546 | done: |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 1547 | write_unlock_bh(&list->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1548 | |
| 1549 | response: |
| 1550 | bh_unlock_sock(parent); |
| 1551 | |
| 1552 | sendresp: |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1553 | rsp.scid = cpu_to_le16(scid); |
| 1554 | rsp.dcid = cpu_to_le16(dcid); |
| 1555 | rsp.result = cpu_to_le16(result); |
| 1556 | rsp.status = cpu_to_le16(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1557 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
| 1558 | return 0; |
| 1559 | } |
| 1560 | |
| 1561 | static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 1562 | { |
| 1563 | struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; |
| 1564 | u16 scid, dcid, result, status; |
| 1565 | struct sock *sk; |
| 1566 | u8 req[128]; |
| 1567 | |
| 1568 | scid = __le16_to_cpu(rsp->scid); |
| 1569 | dcid = __le16_to_cpu(rsp->dcid); |
| 1570 | result = __le16_to_cpu(rsp->result); |
| 1571 | status = __le16_to_cpu(rsp->status); |
| 1572 | |
| 1573 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid, scid, result, status); |
| 1574 | |
| 1575 | if (scid) { |
| 1576 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid))) |
| 1577 | return 0; |
| 1578 | } else { |
| 1579 | if (!(sk = l2cap_get_chan_by_ident(&conn->chan_list, cmd->ident))) |
| 1580 | return 0; |
| 1581 | } |
| 1582 | |
| 1583 | switch (result) { |
| 1584 | case L2CAP_CR_SUCCESS: |
| 1585 | sk->sk_state = BT_CONFIG; |
| 1586 | l2cap_pi(sk)->ident = 0; |
| 1587 | l2cap_pi(sk)->dcid = dcid; |
| 1588 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; |
| 1589 | |
| 1590 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
| 1591 | l2cap_build_conf_req(sk, req), req); |
| 1592 | break; |
| 1593 | |
| 1594 | case L2CAP_CR_PEND: |
| 1595 | break; |
| 1596 | |
| 1597 | default: |
| 1598 | l2cap_chan_del(sk, ECONNREFUSED); |
| 1599 | break; |
| 1600 | } |
| 1601 | |
| 1602 | bh_unlock_sock(sk); |
| 1603 | return 0; |
| 1604 | } |
| 1605 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 1606 | 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] | 1607 | { |
| 1608 | struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; |
| 1609 | u16 dcid, flags; |
| 1610 | u8 rsp[64]; |
| 1611 | struct sock *sk; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1612 | int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1613 | |
| 1614 | dcid = __le16_to_cpu(req->dcid); |
| 1615 | flags = __le16_to_cpu(req->flags); |
| 1616 | |
| 1617 | BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); |
| 1618 | |
| 1619 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid))) |
| 1620 | return -ENOENT; |
| 1621 | |
Marcel Holtmann | 354f60a | 2006-11-18 22:15:20 +0100 | [diff] [blame] | 1622 | if (sk->sk_state == BT_DISCONN) |
| 1623 | goto unlock; |
| 1624 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1625 | /* Reject if config buffer is too small. */ |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 1626 | len = cmd_len - sizeof(*req); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1627 | if (l2cap_pi(sk)->conf_len + len > sizeof(l2cap_pi(sk)->conf_req)) { |
| 1628 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
| 1629 | l2cap_build_conf_rsp(sk, rsp, |
| 1630 | L2CAP_CONF_REJECT, flags), rsp); |
| 1631 | goto unlock; |
| 1632 | } |
| 1633 | |
| 1634 | /* Store config. */ |
| 1635 | memcpy(l2cap_pi(sk)->conf_req + l2cap_pi(sk)->conf_len, req->data, len); |
| 1636 | l2cap_pi(sk)->conf_len += len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1637 | |
| 1638 | if (flags & 0x0001) { |
| 1639 | /* Incomplete config. Send empty response. */ |
| 1640 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1641 | l2cap_build_conf_rsp(sk, rsp, |
| 1642 | L2CAP_CONF_SUCCESS, 0x0001), rsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1643 | goto unlock; |
| 1644 | } |
| 1645 | |
| 1646 | /* Complete config. */ |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1647 | len = l2cap_parse_conf_req(sk, rsp); |
| 1648 | if (len < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1649 | goto unlock; |
| 1650 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1651 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); |
| 1652 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1653 | /* Reset config buffer. */ |
| 1654 | l2cap_pi(sk)->conf_len = 0; |
| 1655 | |
Marcel Holtmann | 876d948 | 2007-10-20 13:35:42 +0200 | [diff] [blame] | 1656 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE)) |
| 1657 | goto unlock; |
| 1658 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1659 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_INPUT_DONE) { |
| 1660 | sk->sk_state = BT_CONNECTED; |
| 1661 | l2cap_chan_ready(sk); |
Marcel Holtmann | 876d948 | 2007-10-20 13:35:42 +0200 | [diff] [blame] | 1662 | goto unlock; |
| 1663 | } |
| 1664 | |
| 1665 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1666 | u8 req[64]; |
| 1667 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
| 1668 | l2cap_build_conf_req(sk, req), req); |
| 1669 | } |
| 1670 | |
| 1671 | unlock: |
| 1672 | bh_unlock_sock(sk); |
| 1673 | return 0; |
| 1674 | } |
| 1675 | |
| 1676 | static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 1677 | { |
| 1678 | struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; |
| 1679 | u16 scid, flags, result; |
| 1680 | struct sock *sk; |
| 1681 | |
| 1682 | scid = __le16_to_cpu(rsp->scid); |
| 1683 | flags = __le16_to_cpu(rsp->flags); |
| 1684 | result = __le16_to_cpu(rsp->result); |
| 1685 | |
| 1686 | BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x", scid, flags, result); |
| 1687 | |
| 1688 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid))) |
| 1689 | return 0; |
| 1690 | |
| 1691 | switch (result) { |
| 1692 | case L2CAP_CONF_SUCCESS: |
| 1693 | break; |
| 1694 | |
| 1695 | case L2CAP_CONF_UNACCEPT: |
| 1696 | if (++l2cap_pi(sk)->conf_retry < L2CAP_CONF_MAX_RETRIES) { |
| 1697 | char req[128]; |
| 1698 | /* It does not make sense to adjust L2CAP parameters |
| 1699 | * that are currently defined in the spec. We simply |
| 1700 | * resend config request that we sent earlier. It is |
| 1701 | * stupid, but it helps qualification testing which |
| 1702 | * expects at least some response from us. */ |
| 1703 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
| 1704 | l2cap_build_conf_req(sk, req), req); |
| 1705 | goto done; |
| 1706 | } |
| 1707 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 1708 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1709 | sk->sk_state = BT_DISCONN; |
| 1710 | sk->sk_err = ECONNRESET; |
| 1711 | l2cap_sock_set_timer(sk, HZ * 5); |
| 1712 | { |
| 1713 | struct l2cap_disconn_req req; |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1714 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 1715 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1716 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
| 1717 | L2CAP_DISCONN_REQ, sizeof(req), &req); |
| 1718 | } |
| 1719 | goto done; |
| 1720 | } |
| 1721 | |
| 1722 | if (flags & 0x01) |
| 1723 | goto done; |
| 1724 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1725 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_INPUT_DONE; |
| 1726 | |
| 1727 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE) { |
| 1728 | sk->sk_state = BT_CONNECTED; |
| 1729 | l2cap_chan_ready(sk); |
| 1730 | } |
| 1731 | |
| 1732 | done: |
| 1733 | bh_unlock_sock(sk); |
| 1734 | return 0; |
| 1735 | } |
| 1736 | |
| 1737 | static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 1738 | { |
| 1739 | struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; |
| 1740 | struct l2cap_disconn_rsp rsp; |
| 1741 | u16 dcid, scid; |
| 1742 | struct sock *sk; |
| 1743 | |
| 1744 | scid = __le16_to_cpu(req->scid); |
| 1745 | dcid = __le16_to_cpu(req->dcid); |
| 1746 | |
| 1747 | BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); |
| 1748 | |
| 1749 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid))) |
| 1750 | return 0; |
| 1751 | |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1752 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 1753 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1754 | l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); |
| 1755 | |
| 1756 | sk->sk_shutdown = SHUTDOWN_MASK; |
| 1757 | |
| 1758 | l2cap_chan_del(sk, ECONNRESET); |
| 1759 | bh_unlock_sock(sk); |
| 1760 | |
| 1761 | l2cap_sock_kill(sk); |
| 1762 | return 0; |
| 1763 | } |
| 1764 | |
| 1765 | static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 1766 | { |
| 1767 | struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; |
| 1768 | u16 dcid, scid; |
| 1769 | struct sock *sk; |
| 1770 | |
| 1771 | scid = __le16_to_cpu(rsp->scid); |
| 1772 | dcid = __le16_to_cpu(rsp->dcid); |
| 1773 | |
| 1774 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); |
| 1775 | |
| 1776 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid))) |
| 1777 | return 0; |
| 1778 | |
| 1779 | l2cap_chan_del(sk, 0); |
| 1780 | bh_unlock_sock(sk); |
| 1781 | |
| 1782 | l2cap_sock_kill(sk); |
| 1783 | return 0; |
| 1784 | } |
| 1785 | |
| 1786 | static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 1787 | { |
| 1788 | struct l2cap_info_req *req = (struct l2cap_info_req *) data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1789 | u16 type; |
| 1790 | |
| 1791 | type = __le16_to_cpu(req->type); |
| 1792 | |
| 1793 | BT_DBG("type 0x%4.4x", type); |
| 1794 | |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 1795 | if (type == L2CAP_IT_FEAT_MASK) { |
| 1796 | u8 buf[8]; |
| 1797 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
| 1798 | rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 1799 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); |
| 1800 | put_unaligned(cpu_to_le32(l2cap_feat_mask), (__le32 *) rsp->data); |
| 1801 | l2cap_send_cmd(conn, cmd->ident, |
| 1802 | L2CAP_INFO_RSP, sizeof(buf), buf); |
| 1803 | } else { |
| 1804 | struct l2cap_info_rsp rsp; |
| 1805 | rsp.type = cpu_to_le16(type); |
| 1806 | rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP); |
| 1807 | l2cap_send_cmd(conn, cmd->ident, |
| 1808 | L2CAP_INFO_RSP, sizeof(rsp), &rsp); |
| 1809 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1810 | |
| 1811 | return 0; |
| 1812 | } |
| 1813 | |
| 1814 | static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 1815 | { |
| 1816 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; |
| 1817 | u16 type, result; |
| 1818 | |
| 1819 | type = __le16_to_cpu(rsp->type); |
| 1820 | result = __le16_to_cpu(rsp->result); |
| 1821 | |
| 1822 | BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); |
| 1823 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1824 | conn->info_ident = 0; |
| 1825 | |
| 1826 | del_timer(&conn->info_timer); |
| 1827 | |
| 1828 | if (type == L2CAP_IT_FEAT_MASK) |
| 1829 | conn->feat_mask = __le32_to_cpu(get_unaligned((__le32 *) rsp->data)); |
| 1830 | |
| 1831 | l2cap_conn_start(conn); |
| 1832 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1833 | return 0; |
| 1834 | } |
| 1835 | |
| 1836 | static inline void l2cap_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb) |
| 1837 | { |
| 1838 | u8 *data = skb->data; |
| 1839 | int len = skb->len; |
| 1840 | struct l2cap_cmd_hdr cmd; |
| 1841 | int err = 0; |
| 1842 | |
| 1843 | l2cap_raw_recv(conn, skb); |
| 1844 | |
| 1845 | while (len >= L2CAP_CMD_HDR_SIZE) { |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 1846 | u16 cmd_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1847 | memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); |
| 1848 | data += L2CAP_CMD_HDR_SIZE; |
| 1849 | len -= L2CAP_CMD_HDR_SIZE; |
| 1850 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 1851 | cmd_len = le16_to_cpu(cmd.len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1852 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 1853 | 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] | 1854 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 1855 | if (cmd_len > len || !cmd.ident) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1856 | BT_DBG("corrupted command"); |
| 1857 | break; |
| 1858 | } |
| 1859 | |
| 1860 | switch (cmd.code) { |
| 1861 | case L2CAP_COMMAND_REJ: |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1862 | l2cap_command_rej(conn, &cmd, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1863 | break; |
| 1864 | |
| 1865 | case L2CAP_CONN_REQ: |
| 1866 | err = l2cap_connect_req(conn, &cmd, data); |
| 1867 | break; |
| 1868 | |
| 1869 | case L2CAP_CONN_RSP: |
| 1870 | err = l2cap_connect_rsp(conn, &cmd, data); |
| 1871 | break; |
| 1872 | |
| 1873 | case L2CAP_CONF_REQ: |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 1874 | err = l2cap_config_req(conn, &cmd, cmd_len, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1875 | break; |
| 1876 | |
| 1877 | case L2CAP_CONF_RSP: |
| 1878 | err = l2cap_config_rsp(conn, &cmd, data); |
| 1879 | break; |
| 1880 | |
| 1881 | case L2CAP_DISCONN_REQ: |
| 1882 | err = l2cap_disconnect_req(conn, &cmd, data); |
| 1883 | break; |
| 1884 | |
| 1885 | case L2CAP_DISCONN_RSP: |
| 1886 | err = l2cap_disconnect_rsp(conn, &cmd, data); |
| 1887 | break; |
| 1888 | |
| 1889 | case L2CAP_ECHO_REQ: |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 1890 | l2cap_send_cmd(conn, cmd.ident, L2CAP_ECHO_RSP, cmd_len, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1891 | break; |
| 1892 | |
| 1893 | case L2CAP_ECHO_RSP: |
| 1894 | break; |
| 1895 | |
| 1896 | case L2CAP_INFO_REQ: |
| 1897 | err = l2cap_information_req(conn, &cmd, data); |
| 1898 | break; |
| 1899 | |
| 1900 | case L2CAP_INFO_RSP: |
| 1901 | err = l2cap_information_rsp(conn, &cmd, data); |
| 1902 | break; |
| 1903 | |
| 1904 | default: |
| 1905 | BT_ERR("Unknown signaling command 0x%2.2x", cmd.code); |
| 1906 | err = -EINVAL; |
| 1907 | break; |
| 1908 | } |
| 1909 | |
| 1910 | if (err) { |
| 1911 | struct l2cap_cmd_rej rej; |
| 1912 | BT_DBG("error %d", err); |
| 1913 | |
| 1914 | /* FIXME: Map err to a valid reason */ |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1915 | rej.reason = cpu_to_le16(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1916 | l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); |
| 1917 | } |
| 1918 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 1919 | data += cmd_len; |
| 1920 | len -= cmd_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1921 | } |
| 1922 | |
| 1923 | kfree_skb(skb); |
| 1924 | } |
| 1925 | |
| 1926 | static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) |
| 1927 | { |
| 1928 | struct sock *sk; |
| 1929 | |
| 1930 | sk = l2cap_get_chan_by_scid(&conn->chan_list, cid); |
| 1931 | if (!sk) { |
| 1932 | BT_DBG("unknown cid 0x%4.4x", cid); |
| 1933 | goto drop; |
| 1934 | } |
| 1935 | |
| 1936 | BT_DBG("sk %p, len %d", sk, skb->len); |
| 1937 | |
| 1938 | if (sk->sk_state != BT_CONNECTED) |
| 1939 | goto drop; |
| 1940 | |
| 1941 | if (l2cap_pi(sk)->imtu < skb->len) |
| 1942 | goto drop; |
| 1943 | |
| 1944 | /* If socket recv buffers overflows we drop data here |
| 1945 | * which is *bad* because L2CAP has to be reliable. |
| 1946 | * But we don't have any other choice. L2CAP doesn't |
| 1947 | * provide flow control mechanism. */ |
| 1948 | |
| 1949 | if (!sock_queue_rcv_skb(sk, skb)) |
| 1950 | goto done; |
| 1951 | |
| 1952 | drop: |
| 1953 | kfree_skb(skb); |
| 1954 | |
| 1955 | done: |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 1956 | if (sk) |
| 1957 | bh_unlock_sock(sk); |
| 1958 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1959 | return 0; |
| 1960 | } |
| 1961 | |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 1962 | 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] | 1963 | { |
| 1964 | struct sock *sk; |
| 1965 | |
| 1966 | sk = l2cap_get_sock_by_psm(0, psm, conn->src); |
| 1967 | if (!sk) |
| 1968 | goto drop; |
| 1969 | |
| 1970 | BT_DBG("sk %p, len %d", sk, skb->len); |
| 1971 | |
| 1972 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECTED) |
| 1973 | goto drop; |
| 1974 | |
| 1975 | if (l2cap_pi(sk)->imtu < skb->len) |
| 1976 | goto drop; |
| 1977 | |
| 1978 | if (!sock_queue_rcv_skb(sk, skb)) |
| 1979 | goto done; |
| 1980 | |
| 1981 | drop: |
| 1982 | kfree_skb(skb); |
| 1983 | |
| 1984 | done: |
| 1985 | if (sk) bh_unlock_sock(sk); |
| 1986 | return 0; |
| 1987 | } |
| 1988 | |
| 1989 | static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) |
| 1990 | { |
| 1991 | struct l2cap_hdr *lh = (void *) skb->data; |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 1992 | u16 cid, len; |
| 1993 | __le16 psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1994 | |
| 1995 | skb_pull(skb, L2CAP_HDR_SIZE); |
| 1996 | cid = __le16_to_cpu(lh->cid); |
| 1997 | len = __le16_to_cpu(lh->len); |
| 1998 | |
| 1999 | BT_DBG("len %d, cid 0x%4.4x", len, cid); |
| 2000 | |
| 2001 | switch (cid) { |
| 2002 | case 0x0001: |
| 2003 | l2cap_sig_channel(conn, skb); |
| 2004 | break; |
| 2005 | |
| 2006 | case 0x0002: |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 2007 | psm = get_unaligned((__le16 *) skb->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2008 | skb_pull(skb, 2); |
| 2009 | l2cap_conless_channel(conn, psm, skb); |
| 2010 | break; |
| 2011 | |
| 2012 | default: |
| 2013 | l2cap_data_channel(conn, cid, skb); |
| 2014 | break; |
| 2015 | } |
| 2016 | } |
| 2017 | |
| 2018 | /* ---- L2CAP interface with lower layer (HCI) ---- */ |
| 2019 | |
| 2020 | static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) |
| 2021 | { |
| 2022 | int exact = 0, lm1 = 0, lm2 = 0; |
| 2023 | register struct sock *sk; |
| 2024 | struct hlist_node *node; |
| 2025 | |
| 2026 | if (type != ACL_LINK) |
| 2027 | return 0; |
| 2028 | |
| 2029 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); |
| 2030 | |
| 2031 | /* Find listening sockets and check their link_mode */ |
| 2032 | read_lock(&l2cap_sk_list.lock); |
| 2033 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
| 2034 | if (sk->sk_state != BT_LISTEN) |
| 2035 | continue; |
| 2036 | |
| 2037 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { |
| 2038 | lm1 |= (HCI_LM_ACCEPT | l2cap_pi(sk)->link_mode); |
| 2039 | exact++; |
| 2040 | } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) |
| 2041 | lm2 |= (HCI_LM_ACCEPT | l2cap_pi(sk)->link_mode); |
| 2042 | } |
| 2043 | read_unlock(&l2cap_sk_list.lock); |
| 2044 | |
| 2045 | return exact ? lm1 : lm2; |
| 2046 | } |
| 2047 | |
| 2048 | static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) |
| 2049 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 2050 | struct l2cap_conn *conn; |
| 2051 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2052 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); |
| 2053 | |
| 2054 | if (hcon->type != ACL_LINK) |
| 2055 | return 0; |
| 2056 | |
| 2057 | if (!status) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2058 | conn = l2cap_conn_add(hcon, status); |
| 2059 | if (conn) |
| 2060 | l2cap_conn_ready(conn); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 2061 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2062 | l2cap_conn_del(hcon, bt_err(status)); |
| 2063 | |
| 2064 | return 0; |
| 2065 | } |
| 2066 | |
| 2067 | static int l2cap_disconn_ind(struct hci_conn *hcon, u8 reason) |
| 2068 | { |
| 2069 | BT_DBG("hcon %p reason %d", hcon, reason); |
| 2070 | |
| 2071 | if (hcon->type != ACL_LINK) |
| 2072 | return 0; |
| 2073 | |
| 2074 | l2cap_conn_del(hcon, bt_err(reason)); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 2075 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2076 | return 0; |
| 2077 | } |
| 2078 | |
| 2079 | static int l2cap_auth_cfm(struct hci_conn *hcon, u8 status) |
| 2080 | { |
| 2081 | struct l2cap_chan_list *l; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 2082 | struct l2cap_conn *conn = conn = hcon->l2cap_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2083 | struct l2cap_conn_rsp rsp; |
| 2084 | struct sock *sk; |
| 2085 | int result; |
| 2086 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 2087 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2088 | return 0; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 2089 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2090 | l = &conn->chan_list; |
| 2091 | |
| 2092 | BT_DBG("conn %p", conn); |
| 2093 | |
| 2094 | read_lock(&l->lock); |
| 2095 | |
| 2096 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
| 2097 | bh_lock_sock(sk); |
| 2098 | |
| 2099 | if (sk->sk_state != BT_CONNECT2 || |
| 2100 | (l2cap_pi(sk)->link_mode & L2CAP_LM_ENCRYPT) || |
| 2101 | (l2cap_pi(sk)->link_mode & L2CAP_LM_SECURE)) { |
| 2102 | bh_unlock_sock(sk); |
| 2103 | continue; |
| 2104 | } |
| 2105 | |
| 2106 | if (!status) { |
| 2107 | sk->sk_state = BT_CONFIG; |
| 2108 | result = 0; |
| 2109 | } else { |
| 2110 | sk->sk_state = BT_DISCONN; |
| 2111 | l2cap_sock_set_timer(sk, HZ/10); |
| 2112 | result = L2CAP_CR_SEC_BLOCK; |
| 2113 | } |
| 2114 | |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2115 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 2116 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 2117 | rsp.result = cpu_to_le16(result); |
| 2118 | rsp.status = cpu_to_le16(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2119 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
| 2120 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
| 2121 | |
| 2122 | bh_unlock_sock(sk); |
| 2123 | } |
| 2124 | |
| 2125 | read_unlock(&l->lock); |
| 2126 | return 0; |
| 2127 | } |
| 2128 | |
| 2129 | static int l2cap_encrypt_cfm(struct hci_conn *hcon, u8 status) |
| 2130 | { |
| 2131 | struct l2cap_chan_list *l; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 2132 | struct l2cap_conn *conn = hcon->l2cap_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2133 | struct l2cap_conn_rsp rsp; |
| 2134 | struct sock *sk; |
| 2135 | int result; |
| 2136 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 2137 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2138 | return 0; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 2139 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2140 | l = &conn->chan_list; |
| 2141 | |
| 2142 | BT_DBG("conn %p", conn); |
| 2143 | |
| 2144 | read_lock(&l->lock); |
| 2145 | |
| 2146 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
| 2147 | bh_lock_sock(sk); |
| 2148 | |
| 2149 | if (sk->sk_state != BT_CONNECT2) { |
| 2150 | bh_unlock_sock(sk); |
| 2151 | continue; |
| 2152 | } |
| 2153 | |
| 2154 | if (!status) { |
| 2155 | sk->sk_state = BT_CONFIG; |
| 2156 | result = 0; |
| 2157 | } else { |
| 2158 | sk->sk_state = BT_DISCONN; |
| 2159 | l2cap_sock_set_timer(sk, HZ/10); |
| 2160 | result = L2CAP_CR_SEC_BLOCK; |
| 2161 | } |
| 2162 | |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2163 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 2164 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 2165 | rsp.result = cpu_to_le16(result); |
| 2166 | rsp.status = cpu_to_le16(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2167 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
| 2168 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
| 2169 | |
| 2170 | if (l2cap_pi(sk)->link_mode & L2CAP_LM_SECURE) |
| 2171 | hci_conn_change_link_key(hcon); |
| 2172 | |
| 2173 | bh_unlock_sock(sk); |
| 2174 | } |
| 2175 | |
| 2176 | read_unlock(&l->lock); |
| 2177 | return 0; |
| 2178 | } |
| 2179 | |
| 2180 | static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) |
| 2181 | { |
| 2182 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 2183 | |
| 2184 | if (!conn && !(conn = l2cap_conn_add(hcon, 0))) |
| 2185 | goto drop; |
| 2186 | |
| 2187 | BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); |
| 2188 | |
| 2189 | if (flags & ACL_START) { |
| 2190 | struct l2cap_hdr *hdr; |
| 2191 | int len; |
| 2192 | |
| 2193 | if (conn->rx_len) { |
| 2194 | BT_ERR("Unexpected start frame (len %d)", skb->len); |
| 2195 | kfree_skb(conn->rx_skb); |
| 2196 | conn->rx_skb = NULL; |
| 2197 | conn->rx_len = 0; |
| 2198 | l2cap_conn_unreliable(conn, ECOMM); |
| 2199 | } |
| 2200 | |
| 2201 | if (skb->len < 2) { |
| 2202 | BT_ERR("Frame is too short (len %d)", skb->len); |
| 2203 | l2cap_conn_unreliable(conn, ECOMM); |
| 2204 | goto drop; |
| 2205 | } |
| 2206 | |
| 2207 | hdr = (struct l2cap_hdr *) skb->data; |
| 2208 | len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; |
| 2209 | |
| 2210 | if (len == skb->len) { |
| 2211 | /* Complete frame received */ |
| 2212 | l2cap_recv_frame(conn, skb); |
| 2213 | return 0; |
| 2214 | } |
| 2215 | |
| 2216 | BT_DBG("Start: total len %d, frag len %d", len, skb->len); |
| 2217 | |
| 2218 | if (skb->len > len) { |
| 2219 | BT_ERR("Frame is too long (len %d, expected len %d)", |
| 2220 | skb->len, len); |
| 2221 | l2cap_conn_unreliable(conn, ECOMM); |
| 2222 | goto drop; |
| 2223 | } |
| 2224 | |
| 2225 | /* Allocate skb for the complete frame (with header) */ |
| 2226 | if (!(conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC))) |
| 2227 | goto drop; |
| 2228 | |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 2229 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
| 2230 | skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2231 | conn->rx_len = len - skb->len; |
| 2232 | } else { |
| 2233 | BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); |
| 2234 | |
| 2235 | if (!conn->rx_len) { |
| 2236 | BT_ERR("Unexpected continuation frame (len %d)", skb->len); |
| 2237 | l2cap_conn_unreliable(conn, ECOMM); |
| 2238 | goto drop; |
| 2239 | } |
| 2240 | |
| 2241 | if (skb->len > conn->rx_len) { |
| 2242 | BT_ERR("Fragment is too long (len %d, expected %d)", |
| 2243 | skb->len, conn->rx_len); |
| 2244 | kfree_skb(conn->rx_skb); |
| 2245 | conn->rx_skb = NULL; |
| 2246 | conn->rx_len = 0; |
| 2247 | l2cap_conn_unreliable(conn, ECOMM); |
| 2248 | goto drop; |
| 2249 | } |
| 2250 | |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 2251 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
| 2252 | skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2253 | conn->rx_len -= skb->len; |
| 2254 | |
| 2255 | if (!conn->rx_len) { |
| 2256 | /* Complete frame received */ |
| 2257 | l2cap_recv_frame(conn, conn->rx_skb); |
| 2258 | conn->rx_skb = NULL; |
| 2259 | } |
| 2260 | } |
| 2261 | |
| 2262 | drop: |
| 2263 | kfree_skb(skb); |
| 2264 | return 0; |
| 2265 | } |
| 2266 | |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 2267 | static ssize_t l2cap_sysfs_show(struct class *dev, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2268 | { |
| 2269 | struct sock *sk; |
| 2270 | struct hlist_node *node; |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 2271 | char *str = buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2272 | |
| 2273 | read_lock_bh(&l2cap_sk_list.lock); |
| 2274 | |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 2275 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
| 2276 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2277 | |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 2278 | str += sprintf(str, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d 0x%x\n", |
| 2279 | batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst), |
Marcel Holtmann | 7386397 | 2007-01-22 22:00:40 +0100 | [diff] [blame] | 2280 | sk->sk_state, btohs(pi->psm), pi->scid, pi->dcid, |
| 2281 | pi->imtu, pi->omtu, pi->link_mode); |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 2282 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2283 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2284 | read_unlock_bh(&l2cap_sk_list.lock); |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 2285 | |
| 2286 | return (str - buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2287 | } |
| 2288 | |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 2289 | static CLASS_ATTR(l2cap, S_IRUGO, l2cap_sysfs_show, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2290 | |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 2291 | static const struct proto_ops l2cap_sock_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2292 | .family = PF_BLUETOOTH, |
| 2293 | .owner = THIS_MODULE, |
| 2294 | .release = l2cap_sock_release, |
| 2295 | .bind = l2cap_sock_bind, |
| 2296 | .connect = l2cap_sock_connect, |
| 2297 | .listen = l2cap_sock_listen, |
| 2298 | .accept = l2cap_sock_accept, |
| 2299 | .getname = l2cap_sock_getname, |
| 2300 | .sendmsg = l2cap_sock_sendmsg, |
| 2301 | .recvmsg = bt_sock_recvmsg, |
| 2302 | .poll = bt_sock_poll, |
| 2303 | .mmap = sock_no_mmap, |
| 2304 | .socketpair = sock_no_socketpair, |
| 2305 | .ioctl = sock_no_ioctl, |
| 2306 | .shutdown = l2cap_sock_shutdown, |
| 2307 | .setsockopt = l2cap_sock_setsockopt, |
| 2308 | .getsockopt = l2cap_sock_getsockopt |
| 2309 | }; |
| 2310 | |
| 2311 | static struct net_proto_family l2cap_sock_family_ops = { |
| 2312 | .family = PF_BLUETOOTH, |
| 2313 | .owner = THIS_MODULE, |
| 2314 | .create = l2cap_sock_create, |
| 2315 | }; |
| 2316 | |
| 2317 | static struct hci_proto l2cap_hci_proto = { |
| 2318 | .name = "L2CAP", |
| 2319 | .id = HCI_PROTO_L2CAP, |
| 2320 | .connect_ind = l2cap_connect_ind, |
| 2321 | .connect_cfm = l2cap_connect_cfm, |
| 2322 | .disconn_ind = l2cap_disconn_ind, |
| 2323 | .auth_cfm = l2cap_auth_cfm, |
| 2324 | .encrypt_cfm = l2cap_encrypt_cfm, |
| 2325 | .recv_acldata = l2cap_recv_acldata |
| 2326 | }; |
| 2327 | |
| 2328 | static int __init l2cap_init(void) |
| 2329 | { |
| 2330 | int err; |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 2331 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2332 | err = proto_register(&l2cap_proto, 0); |
| 2333 | if (err < 0) |
| 2334 | return err; |
| 2335 | |
| 2336 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); |
| 2337 | if (err < 0) { |
| 2338 | BT_ERR("L2CAP socket registration failed"); |
| 2339 | goto error; |
| 2340 | } |
| 2341 | |
| 2342 | err = hci_register_proto(&l2cap_hci_proto); |
| 2343 | if (err < 0) { |
| 2344 | BT_ERR("L2CAP protocol registration failed"); |
| 2345 | bt_sock_unregister(BTPROTO_L2CAP); |
| 2346 | goto error; |
| 2347 | } |
| 2348 | |
Marcel Holtmann | df5c37e | 2006-10-15 17:30:45 +0200 | [diff] [blame] | 2349 | if (class_create_file(bt_class, &class_attr_l2cap) < 0) |
| 2350 | BT_ERR("Failed to create L2CAP info file"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2351 | |
| 2352 | BT_INFO("L2CAP ver %s", VERSION); |
| 2353 | BT_INFO("L2CAP socket layer initialized"); |
| 2354 | |
| 2355 | return 0; |
| 2356 | |
| 2357 | error: |
| 2358 | proto_unregister(&l2cap_proto); |
| 2359 | return err; |
| 2360 | } |
| 2361 | |
| 2362 | static void __exit l2cap_exit(void) |
| 2363 | { |
Marcel Holtmann | a91f2e3 | 2006-07-03 10:02:41 +0200 | [diff] [blame] | 2364 | class_remove_file(bt_class, &class_attr_l2cap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2365 | |
| 2366 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) |
| 2367 | BT_ERR("L2CAP socket unregistration failed"); |
| 2368 | |
| 2369 | if (hci_unregister_proto(&l2cap_hci_proto) < 0) |
| 2370 | BT_ERR("L2CAP protocol unregistration failed"); |
| 2371 | |
| 2372 | proto_unregister(&l2cap_proto); |
| 2373 | } |
| 2374 | |
| 2375 | void l2cap_load(void) |
| 2376 | { |
| 2377 | /* Dummy function to trigger automatic L2CAP module loading by |
| 2378 | * other modules that use L2CAP sockets but don't use any other |
| 2379 | * symbols from it. */ |
| 2380 | return; |
| 2381 | } |
| 2382 | EXPORT_SYMBOL(l2cap_load); |
| 2383 | |
| 2384 | module_init(l2cap_init); |
| 2385 | module_exit(l2cap_exit); |
| 2386 | |
| 2387 | MODULE_AUTHOR("Maxim Krasnyansky <maxk@qualcomm.com>, Marcel Holtmann <marcel@holtmann.org>"); |
| 2388 | MODULE_DESCRIPTION("Bluetooth L2CAP ver " VERSION); |
| 2389 | MODULE_VERSION(VERSION); |
| 2390 | MODULE_LICENSE("GPL"); |
| 2391 | MODULE_ALIAS("bt-proto-0"); |