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 | |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 53 | #define VERSION "2.13" |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 54 | |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 55 | static u32 l2cap_feat_mask = 0x0080; |
| 56 | static u8 l2cap_fixed_chan[8] = { 0x02, }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 58 | static const struct proto_ops l2cap_sock_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
| 60 | static struct bt_sock_list l2cap_sk_list = { |
Robert P. J. Day | d5fb296 | 2008-03-28 16:17:38 -0700 | [diff] [blame] | 61 | .lock = __RW_LOCK_UNLOCKED(l2cap_sk_list.lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | }; |
| 63 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | static void __l2cap_sock_close(struct sock *sk, int reason); |
| 65 | static void l2cap_sock_close(struct sock *sk); |
| 66 | static void l2cap_sock_kill(struct sock *sk); |
| 67 | |
| 68 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, |
| 69 | u8 code, u8 ident, u16 dlen, void *data); |
| 70 | |
| 71 | /* ---- L2CAP timers ---- */ |
| 72 | static void l2cap_sock_timeout(unsigned long arg) |
| 73 | { |
| 74 | struct sock *sk = (struct sock *) arg; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 75 | int reason; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | |
| 77 | BT_DBG("sock %p state %d", sk, sk->sk_state); |
| 78 | |
| 79 | bh_lock_sock(sk); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 80 | |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 81 | if (sk->sk_state == BT_CONNECTED || sk->sk_state == BT_CONFIG) |
| 82 | reason = ECONNREFUSED; |
| 83 | else if (sk->sk_state == BT_CONNECT && |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 84 | l2cap_pi(sk)->sec_level != BT_SECURITY_SDP) |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 85 | reason = ECONNREFUSED; |
| 86 | else |
| 87 | reason = ETIMEDOUT; |
| 88 | |
| 89 | __l2cap_sock_close(sk, reason); |
| 90 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | bh_unlock_sock(sk); |
| 92 | |
| 93 | l2cap_sock_kill(sk); |
| 94 | sock_put(sk); |
| 95 | } |
| 96 | |
| 97 | static void l2cap_sock_set_timer(struct sock *sk, long timeout) |
| 98 | { |
| 99 | BT_DBG("sk %p state %d timeout %ld", sk, sk->sk_state, timeout); |
| 100 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); |
| 101 | } |
| 102 | |
| 103 | static void l2cap_sock_clear_timer(struct sock *sk) |
| 104 | { |
| 105 | BT_DBG("sock %p state %d", sk, sk->sk_state); |
| 106 | sk_stop_timer(sk, &sk->sk_timer); |
| 107 | } |
| 108 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 109 | /* ---- L2CAP channels ---- */ |
| 110 | static struct sock *__l2cap_get_chan_by_dcid(struct l2cap_chan_list *l, u16 cid) |
| 111 | { |
| 112 | struct sock *s; |
| 113 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { |
| 114 | if (l2cap_pi(s)->dcid == cid) |
| 115 | break; |
| 116 | } |
| 117 | return s; |
| 118 | } |
| 119 | |
| 120 | static struct sock *__l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) |
| 121 | { |
| 122 | struct sock *s; |
| 123 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { |
| 124 | if (l2cap_pi(s)->scid == cid) |
| 125 | break; |
| 126 | } |
| 127 | return s; |
| 128 | } |
| 129 | |
| 130 | /* Find channel with given SCID. |
| 131 | * Returns locked socket */ |
| 132 | static inline struct sock *l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) |
| 133 | { |
| 134 | struct sock *s; |
| 135 | read_lock(&l->lock); |
| 136 | s = __l2cap_get_chan_by_scid(l, cid); |
| 137 | if (s) bh_lock_sock(s); |
| 138 | read_unlock(&l->lock); |
| 139 | return s; |
| 140 | } |
| 141 | |
| 142 | static struct sock *__l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) |
| 143 | { |
| 144 | struct sock *s; |
| 145 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { |
| 146 | if (l2cap_pi(s)->ident == ident) |
| 147 | break; |
| 148 | } |
| 149 | return s; |
| 150 | } |
| 151 | |
| 152 | static inline struct sock *l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) |
| 153 | { |
| 154 | struct sock *s; |
| 155 | read_lock(&l->lock); |
| 156 | s = __l2cap_get_chan_by_ident(l, ident); |
| 157 | if (s) bh_lock_sock(s); |
| 158 | read_unlock(&l->lock); |
| 159 | return s; |
| 160 | } |
| 161 | |
| 162 | static u16 l2cap_alloc_cid(struct l2cap_chan_list *l) |
| 163 | { |
| 164 | u16 cid = 0x0040; |
| 165 | |
| 166 | for (; cid < 0xffff; cid++) { |
| 167 | if(!__l2cap_get_chan_by_scid(l, cid)) |
| 168 | return cid; |
| 169 | } |
| 170 | |
| 171 | return 0; |
| 172 | } |
| 173 | |
| 174 | static inline void __l2cap_chan_link(struct l2cap_chan_list *l, struct sock *sk) |
| 175 | { |
| 176 | sock_hold(sk); |
| 177 | |
| 178 | if (l->head) |
| 179 | l2cap_pi(l->head)->prev_c = sk; |
| 180 | |
| 181 | l2cap_pi(sk)->next_c = l->head; |
| 182 | l2cap_pi(sk)->prev_c = NULL; |
| 183 | l->head = sk; |
| 184 | } |
| 185 | |
| 186 | static inline void l2cap_chan_unlink(struct l2cap_chan_list *l, struct sock *sk) |
| 187 | { |
| 188 | struct sock *next = l2cap_pi(sk)->next_c, *prev = l2cap_pi(sk)->prev_c; |
| 189 | |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 190 | write_lock_bh(&l->lock); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 191 | if (sk == l->head) |
| 192 | l->head = next; |
| 193 | |
| 194 | if (next) |
| 195 | l2cap_pi(next)->prev_c = prev; |
| 196 | if (prev) |
| 197 | l2cap_pi(prev)->next_c = next; |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 198 | write_unlock_bh(&l->lock); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 199 | |
| 200 | __sock_put(sk); |
| 201 | } |
| 202 | |
| 203 | static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) |
| 204 | { |
| 205 | struct l2cap_chan_list *l = &conn->chan_list; |
| 206 | |
| 207 | BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, l2cap_pi(sk)->psm, l2cap_pi(sk)->dcid); |
| 208 | |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 209 | conn->disc_reason = 0x13; |
| 210 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 211 | l2cap_pi(sk)->conn = conn; |
| 212 | |
| 213 | if (sk->sk_type == SOCK_SEQPACKET) { |
| 214 | /* Alloc CID for connection-oriented socket */ |
| 215 | l2cap_pi(sk)->scid = l2cap_alloc_cid(l); |
| 216 | } else if (sk->sk_type == SOCK_DGRAM) { |
| 217 | /* Connectionless socket */ |
| 218 | l2cap_pi(sk)->scid = 0x0002; |
| 219 | l2cap_pi(sk)->dcid = 0x0002; |
| 220 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; |
| 221 | } else { |
| 222 | /* Raw socket can send/recv signalling messages only */ |
| 223 | l2cap_pi(sk)->scid = 0x0001; |
| 224 | l2cap_pi(sk)->dcid = 0x0001; |
| 225 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; |
| 226 | } |
| 227 | |
| 228 | __l2cap_chan_link(l, sk); |
| 229 | |
| 230 | if (parent) |
| 231 | bt_accept_enqueue(parent, sk); |
| 232 | } |
| 233 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 234 | /* Delete channel. |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 235 | * Must be called on the locked socket. */ |
| 236 | static void l2cap_chan_del(struct sock *sk, int err) |
| 237 | { |
| 238 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 239 | struct sock *parent = bt_sk(sk)->parent; |
| 240 | |
| 241 | l2cap_sock_clear_timer(sk); |
| 242 | |
| 243 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); |
| 244 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 245 | if (conn) { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 246 | /* Unlink from channel list */ |
| 247 | l2cap_chan_unlink(&conn->chan_list, sk); |
| 248 | l2cap_pi(sk)->conn = NULL; |
| 249 | hci_conn_put(conn->hcon); |
| 250 | } |
| 251 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 252 | sk->sk_state = BT_CLOSED; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 253 | sock_set_flag(sk, SOCK_ZAPPED); |
| 254 | |
| 255 | if (err) |
| 256 | sk->sk_err = err; |
| 257 | |
| 258 | if (parent) { |
| 259 | bt_accept_unlink(sk); |
| 260 | parent->sk_data_ready(parent, 0); |
| 261 | } else |
| 262 | sk->sk_state_change(sk); |
| 263 | } |
| 264 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 265 | /* Service level security */ |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 266 | static inline int l2cap_check_security(struct sock *sk) |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 267 | { |
| 268 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
Marcel Holtmann | 0684e5f | 2009-02-09 02:48:38 +0100 | [diff] [blame] | 269 | __u8 auth_type; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 270 | |
Marcel Holtmann | 00ae4af | 2009-02-12 16:19:45 +0100 | [diff] [blame] | 271 | if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
| 272 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) |
| 273 | auth_type = HCI_AT_NO_BONDING_MITM; |
| 274 | else |
| 275 | auth_type = HCI_AT_NO_BONDING; |
| 276 | |
| 277 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) |
| 278 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; |
| 279 | } else { |
| 280 | switch (l2cap_pi(sk)->sec_level) { |
| 281 | case BT_SECURITY_HIGH: |
| 282 | auth_type = HCI_AT_GENERAL_BONDING_MITM; |
| 283 | break; |
| 284 | case BT_SECURITY_MEDIUM: |
| 285 | auth_type = HCI_AT_GENERAL_BONDING; |
| 286 | break; |
| 287 | default: |
| 288 | auth_type = HCI_AT_NO_BONDING; |
| 289 | break; |
| 290 | } |
Marcel Holtmann | 0684e5f | 2009-02-09 02:48:38 +0100 | [diff] [blame] | 291 | } |
| 292 | |
| 293 | return hci_conn_security(conn->hcon, l2cap_pi(sk)->sec_level, |
| 294 | auth_type); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 295 | } |
| 296 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 297 | static inline u8 l2cap_get_ident(struct l2cap_conn *conn) |
| 298 | { |
| 299 | u8 id; |
| 300 | |
| 301 | /* Get next available identificator. |
| 302 | * 1 - 128 are used by kernel. |
| 303 | * 129 - 199 are reserved. |
| 304 | * 200 - 254 are used by utilities like l2ping, etc. |
| 305 | */ |
| 306 | |
| 307 | spin_lock_bh(&conn->lock); |
| 308 | |
| 309 | if (++conn->tx_ident > 128) |
| 310 | conn->tx_ident = 1; |
| 311 | |
| 312 | id = conn->tx_ident; |
| 313 | |
| 314 | spin_unlock_bh(&conn->lock); |
| 315 | |
| 316 | return id; |
| 317 | } |
| 318 | |
| 319 | static inline int l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, void *data) |
| 320 | { |
| 321 | struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); |
| 322 | |
| 323 | BT_DBG("code 0x%2.2x", code); |
| 324 | |
| 325 | if (!skb) |
| 326 | return -ENOMEM; |
| 327 | |
| 328 | return hci_send_acl(conn->hcon, skb, 0); |
| 329 | } |
| 330 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 331 | static void l2cap_do_start(struct sock *sk) |
| 332 | { |
| 333 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 334 | |
| 335 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) { |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 336 | if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)) |
| 337 | return; |
| 338 | |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 339 | if (l2cap_check_security(sk)) { |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 340 | struct l2cap_conn_req req; |
| 341 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 342 | req.psm = l2cap_pi(sk)->psm; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 343 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 344 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 345 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 346 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 347 | L2CAP_CONN_REQ, sizeof(req), &req); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 348 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 349 | } else { |
| 350 | struct l2cap_info_req req; |
| 351 | req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 352 | |
| 353 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; |
| 354 | conn->info_ident = l2cap_get_ident(conn); |
| 355 | |
| 356 | mod_timer(&conn->info_timer, jiffies + |
| 357 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); |
| 358 | |
| 359 | l2cap_send_cmd(conn, conn->info_ident, |
| 360 | L2CAP_INFO_REQ, sizeof(req), &req); |
| 361 | } |
| 362 | } |
| 363 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | /* ---- L2CAP connections ---- */ |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 365 | static void l2cap_conn_start(struct l2cap_conn *conn) |
| 366 | { |
| 367 | struct l2cap_chan_list *l = &conn->chan_list; |
| 368 | struct sock *sk; |
| 369 | |
| 370 | BT_DBG("conn %p", conn); |
| 371 | |
| 372 | read_lock(&l->lock); |
| 373 | |
| 374 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
| 375 | bh_lock_sock(sk); |
| 376 | |
| 377 | if (sk->sk_type != SOCK_SEQPACKET) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 378 | bh_unlock_sock(sk); |
| 379 | continue; |
| 380 | } |
| 381 | |
| 382 | if (sk->sk_state == BT_CONNECT) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 383 | if (l2cap_check_security(sk)) { |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 384 | struct l2cap_conn_req req; |
| 385 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 386 | req.psm = l2cap_pi(sk)->psm; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 387 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 388 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 389 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 390 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 391 | L2CAP_CONN_REQ, sizeof(req), &req); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 392 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 393 | } else if (sk->sk_state == BT_CONNECT2) { |
| 394 | struct l2cap_conn_rsp rsp; |
| 395 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 396 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 397 | |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 398 | if (l2cap_check_security(sk)) { |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 399 | if (bt_sk(sk)->defer_setup) { |
| 400 | struct sock *parent = bt_sk(sk)->parent; |
| 401 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); |
| 402 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHOR_PEND); |
| 403 | parent->sk_data_ready(parent, 0); |
| 404 | |
| 405 | } else { |
| 406 | sk->sk_state = BT_CONFIG; |
| 407 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); |
| 408 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 409 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 410 | } else { |
| 411 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); |
| 412 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHEN_PEND); |
| 413 | } |
| 414 | |
| 415 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
| 416 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
| 417 | } |
| 418 | |
| 419 | bh_unlock_sock(sk); |
| 420 | } |
| 421 | |
| 422 | read_unlock(&l->lock); |
| 423 | } |
| 424 | |
| 425 | static void l2cap_conn_ready(struct l2cap_conn *conn) |
| 426 | { |
| 427 | struct l2cap_chan_list *l = &conn->chan_list; |
| 428 | struct sock *sk; |
| 429 | |
| 430 | BT_DBG("conn %p", conn); |
| 431 | |
| 432 | read_lock(&l->lock); |
| 433 | |
| 434 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
| 435 | bh_lock_sock(sk); |
| 436 | |
| 437 | if (sk->sk_type != SOCK_SEQPACKET) { |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 438 | l2cap_sock_clear_timer(sk); |
| 439 | sk->sk_state = BT_CONNECTED; |
| 440 | sk->sk_state_change(sk); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 441 | } else if (sk->sk_state == BT_CONNECT) |
| 442 | l2cap_do_start(sk); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 443 | |
| 444 | bh_unlock_sock(sk); |
| 445 | } |
| 446 | |
| 447 | read_unlock(&l->lock); |
| 448 | } |
| 449 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 450 | /* Notify sockets that we cannot guaranty reliability anymore */ |
| 451 | static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) |
| 452 | { |
| 453 | struct l2cap_chan_list *l = &conn->chan_list; |
| 454 | struct sock *sk; |
| 455 | |
| 456 | BT_DBG("conn %p", conn); |
| 457 | |
| 458 | read_lock(&l->lock); |
| 459 | |
| 460 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 461 | if (l2cap_pi(sk)->force_reliable) |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 462 | sk->sk_err = err; |
| 463 | } |
| 464 | |
| 465 | read_unlock(&l->lock); |
| 466 | } |
| 467 | |
| 468 | static void l2cap_info_timeout(unsigned long arg) |
| 469 | { |
| 470 | struct l2cap_conn *conn = (void *) arg; |
| 471 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 472 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 473 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 474 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 475 | l2cap_conn_start(conn); |
| 476 | } |
| 477 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) |
| 479 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 480 | struct l2cap_conn *conn = hcon->l2cap_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 482 | if (conn || status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | return conn; |
| 484 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 485 | conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC); |
| 486 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | |
| 489 | hcon->l2cap_data = conn; |
| 490 | conn->hcon = hcon; |
| 491 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 492 | BT_DBG("hcon %p conn %p", hcon, conn); |
| 493 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | conn->mtu = hcon->hdev->acl_mtu; |
| 495 | conn->src = &hcon->hdev->bdaddr; |
| 496 | conn->dst = &hcon->dst; |
| 497 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 498 | conn->feat_mask = 0; |
| 499 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 500 | setup_timer(&conn->info_timer, l2cap_info_timeout, |
| 501 | (unsigned long) conn); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 502 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | spin_lock_init(&conn->lock); |
| 504 | rwlock_init(&conn->chan_list.lock); |
| 505 | |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 506 | conn->disc_reason = 0x13; |
| 507 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | return conn; |
| 509 | } |
| 510 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 511 | static void l2cap_conn_del(struct hci_conn *hcon, int err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 513 | struct l2cap_conn *conn = hcon->l2cap_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | struct sock *sk; |
| 515 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 516 | if (!conn) |
| 517 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | |
| 519 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); |
| 520 | |
| 521 | if (conn->rx_skb) |
| 522 | kfree_skb(conn->rx_skb); |
| 523 | |
| 524 | /* Kill channels */ |
| 525 | while ((sk = conn->chan_list.head)) { |
| 526 | bh_lock_sock(sk); |
| 527 | l2cap_chan_del(sk, err); |
| 528 | bh_unlock_sock(sk); |
| 529 | l2cap_sock_kill(sk); |
| 530 | } |
| 531 | |
Dave Young | 8e8440f | 2008-03-03 12:18:55 -0800 | [diff] [blame] | 532 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) |
| 533 | del_timer_sync(&conn->info_timer); |
Thomas Gleixner | 3ab2273 | 2008-02-26 17:42:56 -0800 | [diff] [blame] | 534 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | hcon->l2cap_data = NULL; |
| 536 | kfree(conn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | } |
| 538 | |
| 539 | static inline void l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) |
| 540 | { |
| 541 | struct l2cap_chan_list *l = &conn->chan_list; |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 542 | write_lock_bh(&l->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | __l2cap_chan_add(conn, sk, parent); |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 544 | write_unlock_bh(&l->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | } |
| 546 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | /* ---- Socket interface ---- */ |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 548 | 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] | 549 | { |
| 550 | struct sock *sk; |
| 551 | struct hlist_node *node; |
| 552 | sk_for_each(sk, node, &l2cap_sk_list.head) |
| 553 | if (l2cap_pi(sk)->sport == psm && !bacmp(&bt_sk(sk)->src, src)) |
| 554 | goto found; |
| 555 | sk = NULL; |
| 556 | found: |
| 557 | return sk; |
| 558 | } |
| 559 | |
| 560 | /* Find socket with psm and source bdaddr. |
| 561 | * Returns closest match. |
| 562 | */ |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 563 | 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] | 564 | { |
| 565 | struct sock *sk = NULL, *sk1 = NULL; |
| 566 | struct hlist_node *node; |
| 567 | |
| 568 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
| 569 | if (state && sk->sk_state != state) |
| 570 | continue; |
| 571 | |
| 572 | if (l2cap_pi(sk)->psm == psm) { |
| 573 | /* Exact match. */ |
| 574 | if (!bacmp(&bt_sk(sk)->src, src)) |
| 575 | break; |
| 576 | |
| 577 | /* Closest match */ |
| 578 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) |
| 579 | sk1 = sk; |
| 580 | } |
| 581 | } |
| 582 | return node ? sk : sk1; |
| 583 | } |
| 584 | |
| 585 | /* Find socket with given address (psm, src). |
| 586 | * Returns locked socket */ |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 587 | 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] | 588 | { |
| 589 | struct sock *s; |
| 590 | read_lock(&l2cap_sk_list.lock); |
| 591 | s = __l2cap_get_sock_by_psm(state, psm, src); |
| 592 | if (s) bh_lock_sock(s); |
| 593 | read_unlock(&l2cap_sk_list.lock); |
| 594 | return s; |
| 595 | } |
| 596 | |
| 597 | static void l2cap_sock_destruct(struct sock *sk) |
| 598 | { |
| 599 | BT_DBG("sk %p", sk); |
| 600 | |
| 601 | skb_queue_purge(&sk->sk_receive_queue); |
| 602 | skb_queue_purge(&sk->sk_write_queue); |
| 603 | } |
| 604 | |
| 605 | static void l2cap_sock_cleanup_listen(struct sock *parent) |
| 606 | { |
| 607 | struct sock *sk; |
| 608 | |
| 609 | BT_DBG("parent %p", parent); |
| 610 | |
| 611 | /* Close not yet accepted channels */ |
| 612 | while ((sk = bt_accept_dequeue(parent, NULL))) |
| 613 | l2cap_sock_close(sk); |
| 614 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 615 | parent->sk_state = BT_CLOSED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | sock_set_flag(parent, SOCK_ZAPPED); |
| 617 | } |
| 618 | |
| 619 | /* Kill socket (only if zapped and orphan) |
| 620 | * Must be called on unlocked socket. |
| 621 | */ |
| 622 | static void l2cap_sock_kill(struct sock *sk) |
| 623 | { |
| 624 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) |
| 625 | return; |
| 626 | |
| 627 | BT_DBG("sk %p state %d", sk, sk->sk_state); |
| 628 | |
| 629 | /* Kill poor orphan */ |
| 630 | bt_sock_unlink(&l2cap_sk_list, sk); |
| 631 | sock_set_flag(sk, SOCK_DEAD); |
| 632 | sock_put(sk); |
| 633 | } |
| 634 | |
| 635 | static void __l2cap_sock_close(struct sock *sk, int reason) |
| 636 | { |
| 637 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); |
| 638 | |
| 639 | switch (sk->sk_state) { |
| 640 | case BT_LISTEN: |
| 641 | l2cap_sock_cleanup_listen(sk); |
| 642 | break; |
| 643 | |
| 644 | case BT_CONNECTED: |
| 645 | case BT_CONFIG: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | if (sk->sk_type == SOCK_SEQPACKET) { |
| 647 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 648 | struct l2cap_disconn_req req; |
| 649 | |
| 650 | sk->sk_state = BT_DISCONN; |
| 651 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); |
| 652 | |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 653 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 654 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
| 656 | L2CAP_DISCONN_REQ, sizeof(req), &req); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 657 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | l2cap_chan_del(sk, reason); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | break; |
| 660 | |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 661 | case BT_CONNECT2: |
| 662 | if (sk->sk_type == SOCK_SEQPACKET) { |
| 663 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 664 | struct l2cap_conn_rsp rsp; |
| 665 | __u16 result; |
| 666 | |
| 667 | if (bt_sk(sk)->defer_setup) |
| 668 | result = L2CAP_CR_SEC_BLOCK; |
| 669 | else |
| 670 | result = L2CAP_CR_BAD_PSM; |
| 671 | |
| 672 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 673 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 674 | rsp.result = cpu_to_le16(result); |
| 675 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 676 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
| 677 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
| 678 | } else |
| 679 | l2cap_chan_del(sk, reason); |
| 680 | break; |
| 681 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | case BT_CONNECT: |
| 683 | case BT_DISCONN: |
| 684 | l2cap_chan_del(sk, reason); |
| 685 | break; |
| 686 | |
| 687 | default: |
| 688 | sock_set_flag(sk, SOCK_ZAPPED); |
| 689 | break; |
| 690 | } |
| 691 | } |
| 692 | |
| 693 | /* Must be called on unlocked socket. */ |
| 694 | static void l2cap_sock_close(struct sock *sk) |
| 695 | { |
| 696 | l2cap_sock_clear_timer(sk); |
| 697 | lock_sock(sk); |
| 698 | __l2cap_sock_close(sk, ECONNRESET); |
| 699 | release_sock(sk); |
| 700 | l2cap_sock_kill(sk); |
| 701 | } |
| 702 | |
| 703 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) |
| 704 | { |
| 705 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 706 | |
| 707 | BT_DBG("sk %p", sk); |
| 708 | |
| 709 | if (parent) { |
| 710 | sk->sk_type = parent->sk_type; |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 711 | bt_sk(sk)->defer_setup = bt_sk(parent)->defer_setup; |
| 712 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | pi->imtu = l2cap_pi(parent)->imtu; |
| 714 | pi->omtu = l2cap_pi(parent)->omtu; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 715 | pi->sec_level = l2cap_pi(parent)->sec_level; |
| 716 | pi->role_switch = l2cap_pi(parent)->role_switch; |
| 717 | pi->force_reliable = l2cap_pi(parent)->force_reliable; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | } else { |
| 719 | pi->imtu = L2CAP_DEFAULT_MTU; |
| 720 | pi->omtu = 0; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 721 | pi->sec_level = BT_SECURITY_LOW; |
| 722 | pi->role_switch = 0; |
| 723 | pi->force_reliable = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | } |
| 725 | |
| 726 | /* Default config options */ |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 727 | pi->conf_len = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | pi->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
| 729 | } |
| 730 | |
| 731 | static struct proto l2cap_proto = { |
| 732 | .name = "L2CAP", |
| 733 | .owner = THIS_MODULE, |
| 734 | .obj_size = sizeof(struct l2cap_pinfo) |
| 735 | }; |
| 736 | |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 737 | 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] | 738 | { |
| 739 | struct sock *sk; |
| 740 | |
Pavel Emelyanov | 6257ff2 | 2007-11-01 00:39:31 -0700 | [diff] [blame] | 741 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | if (!sk) |
| 743 | return NULL; |
| 744 | |
| 745 | sock_init_data(sock, sk); |
| 746 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); |
| 747 | |
| 748 | sk->sk_destruct = l2cap_sock_destruct; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 749 | sk->sk_sndtimeo = msecs_to_jiffies(L2CAP_CONN_TIMEOUT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | |
| 751 | sock_reset_flag(sk, SOCK_ZAPPED); |
| 752 | |
| 753 | sk->sk_protocol = proto; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 754 | sk->sk_state = BT_OPEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 756 | setup_timer(&sk->sk_timer, l2cap_sock_timeout, (unsigned long) sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | |
| 758 | bt_sock_link(&l2cap_sk_list, sk); |
| 759 | return sk; |
| 760 | } |
| 761 | |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 762 | 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] | 763 | { |
| 764 | struct sock *sk; |
| 765 | |
| 766 | BT_DBG("sock %p", sock); |
| 767 | |
| 768 | sock->state = SS_UNCONNECTED; |
| 769 | |
| 770 | if (sock->type != SOCK_SEQPACKET && |
| 771 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) |
| 772 | return -ESOCKTNOSUPPORT; |
| 773 | |
| 774 | if (sock->type == SOCK_RAW && !capable(CAP_NET_RAW)) |
| 775 | return -EPERM; |
| 776 | |
| 777 | sock->ops = &l2cap_sock_ops; |
| 778 | |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 779 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | if (!sk) |
| 781 | return -ENOMEM; |
| 782 | |
| 783 | l2cap_sock_init(sk, NULL); |
| 784 | return 0; |
| 785 | } |
| 786 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 787 | static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | struct sock *sk = sock->sk; |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 790 | struct sockaddr_l2 la; |
| 791 | int len, err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 793 | BT_DBG("sk %p", sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | |
| 795 | if (!addr || addr->sa_family != AF_BLUETOOTH) |
| 796 | return -EINVAL; |
| 797 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 798 | memset(&la, 0, sizeof(la)); |
| 799 | len = min_t(unsigned int, sizeof(la), alen); |
| 800 | memcpy(&la, addr, len); |
| 801 | |
Marcel Holtmann | 2a517ca | 2009-02-16 03:20:31 +0100 | [diff] [blame] | 802 | if (la.l2_cid) |
| 803 | return -EINVAL; |
| 804 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | lock_sock(sk); |
| 806 | |
| 807 | if (sk->sk_state != BT_OPEN) { |
| 808 | err = -EBADFD; |
| 809 | goto done; |
| 810 | } |
| 811 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 812 | if (la.l2_psm && btohs(la.l2_psm) < 0x1001 && |
Marcel Holtmann | 847641d | 2007-01-22 22:00:45 +0100 | [diff] [blame] | 813 | !capable(CAP_NET_BIND_SERVICE)) { |
| 814 | err = -EACCES; |
| 815 | goto done; |
| 816 | } |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 817 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | write_lock_bh(&l2cap_sk_list.lock); |
| 819 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 820 | if (la.l2_psm && __l2cap_get_sock_by_addr(la.l2_psm, &la.l2_bdaddr)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | err = -EADDRINUSE; |
| 822 | } else { |
| 823 | /* Save source address */ |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 824 | bacpy(&bt_sk(sk)->src, &la.l2_bdaddr); |
| 825 | l2cap_pi(sk)->psm = la.l2_psm; |
| 826 | l2cap_pi(sk)->sport = la.l2_psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | sk->sk_state = BT_BOUND; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 828 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 829 | if (btohs(la.l2_psm) == 0x0001 || btohs(la.l2_psm) == 0x0003) |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 830 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | } |
| 832 | |
| 833 | write_unlock_bh(&l2cap_sk_list.lock); |
| 834 | |
| 835 | done: |
| 836 | release_sock(sk); |
| 837 | return err; |
| 838 | } |
| 839 | |
| 840 | static int l2cap_do_connect(struct sock *sk) |
| 841 | { |
| 842 | bdaddr_t *src = &bt_sk(sk)->src; |
| 843 | bdaddr_t *dst = &bt_sk(sk)->dst; |
| 844 | struct l2cap_conn *conn; |
| 845 | struct hci_conn *hcon; |
| 846 | struct hci_dev *hdev; |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 847 | __u8 auth_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | int err = 0; |
| 849 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 850 | BT_DBG("%s -> %s psm 0x%2.2x", batostr(src), batostr(dst), |
| 851 | l2cap_pi(sk)->psm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | |
| 853 | if (!(hdev = hci_get_route(dst, src))) |
| 854 | return -EHOSTUNREACH; |
| 855 | |
| 856 | hci_dev_lock_bh(hdev); |
| 857 | |
| 858 | err = -ENOMEM; |
| 859 | |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 860 | if (sk->sk_type == SOCK_RAW) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 861 | switch (l2cap_pi(sk)->sec_level) { |
| 862 | case BT_SECURITY_HIGH: |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 863 | auth_type = HCI_AT_DEDICATED_BONDING_MITM; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 864 | break; |
| 865 | case BT_SECURITY_MEDIUM: |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 866 | auth_type = HCI_AT_DEDICATED_BONDING; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 867 | break; |
| 868 | default: |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 869 | auth_type = HCI_AT_NO_BONDING; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 870 | break; |
| 871 | } |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 872 | } else if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 873 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 874 | auth_type = HCI_AT_NO_BONDING_MITM; |
| 875 | else |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 876 | auth_type = HCI_AT_NO_BONDING; |
Marcel Holtmann | 435fef2 | 2009-02-09 03:55:28 +0100 | [diff] [blame] | 877 | |
| 878 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) |
| 879 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 880 | } else { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 881 | switch (l2cap_pi(sk)->sec_level) { |
| 882 | case BT_SECURITY_HIGH: |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 883 | auth_type = HCI_AT_GENERAL_BONDING_MITM; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 884 | break; |
| 885 | case BT_SECURITY_MEDIUM: |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 886 | auth_type = HCI_AT_GENERAL_BONDING; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 887 | break; |
| 888 | default: |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 889 | auth_type = HCI_AT_NO_BONDING; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 890 | break; |
| 891 | } |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 892 | } |
| 893 | |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 894 | hcon = hci_connect(hdev, ACL_LINK, dst, |
| 895 | l2cap_pi(sk)->sec_level, auth_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | if (!hcon) |
| 897 | goto done; |
| 898 | |
| 899 | conn = l2cap_conn_add(hcon, 0); |
| 900 | if (!conn) { |
| 901 | hci_conn_put(hcon); |
| 902 | goto done; |
| 903 | } |
| 904 | |
| 905 | err = 0; |
| 906 | |
| 907 | /* Update source addr of the socket */ |
| 908 | bacpy(src, conn->src); |
| 909 | |
| 910 | l2cap_chan_add(conn, sk, NULL); |
| 911 | |
| 912 | sk->sk_state = BT_CONNECT; |
| 913 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); |
| 914 | |
| 915 | if (hcon->state == BT_CONNECTED) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 916 | if (sk->sk_type != SOCK_SEQPACKET) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | l2cap_sock_clear_timer(sk); |
| 918 | sk->sk_state = BT_CONNECTED; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 919 | } else |
| 920 | l2cap_do_start(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | } |
| 922 | |
| 923 | done: |
| 924 | hci_dev_unlock_bh(hdev); |
| 925 | hci_dev_put(hdev); |
| 926 | return err; |
| 927 | } |
| 928 | |
| 929 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) |
| 930 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | struct sock *sk = sock->sk; |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 932 | struct sockaddr_l2 la; |
| 933 | int len, err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | BT_DBG("sk %p", sk); |
| 936 | |
Marcel Holtmann | 2a517ca | 2009-02-16 03:20:31 +0100 | [diff] [blame] | 937 | if (!addr || addr->sa_family != AF_BLUETOOTH) |
| 938 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 940 | memset(&la, 0, sizeof(la)); |
| 941 | len = min_t(unsigned int, sizeof(la), alen); |
| 942 | memcpy(&la, addr, len); |
| 943 | |
Marcel Holtmann | 2a517ca | 2009-02-16 03:20:31 +0100 | [diff] [blame] | 944 | if (la.l2_cid) |
| 945 | return -EINVAL; |
| 946 | |
| 947 | lock_sock(sk); |
| 948 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 949 | if (sk->sk_type == SOCK_SEQPACKET && !la.l2_psm) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | err = -EINVAL; |
| 951 | goto done; |
| 952 | } |
| 953 | |
| 954 | switch(sk->sk_state) { |
| 955 | case BT_CONNECT: |
| 956 | case BT_CONNECT2: |
| 957 | case BT_CONFIG: |
| 958 | /* Already connecting */ |
| 959 | goto wait; |
| 960 | |
| 961 | case BT_CONNECTED: |
| 962 | /* Already connected */ |
| 963 | goto done; |
| 964 | |
| 965 | case BT_OPEN: |
| 966 | case BT_BOUND: |
| 967 | /* Can connect */ |
| 968 | break; |
| 969 | |
| 970 | default: |
| 971 | err = -EBADFD; |
| 972 | goto done; |
| 973 | } |
| 974 | |
| 975 | /* Set destination address and psm */ |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 976 | bacpy(&bt_sk(sk)->dst, &la.l2_bdaddr); |
| 977 | l2cap_pi(sk)->psm = la.l2_psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | |
| 979 | if ((err = l2cap_do_connect(sk))) |
| 980 | goto done; |
| 981 | |
| 982 | wait: |
| 983 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
| 984 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
| 985 | done: |
| 986 | release_sock(sk); |
| 987 | return err; |
| 988 | } |
| 989 | |
| 990 | static int l2cap_sock_listen(struct socket *sock, int backlog) |
| 991 | { |
| 992 | struct sock *sk = sock->sk; |
| 993 | int err = 0; |
| 994 | |
| 995 | BT_DBG("sk %p backlog %d", sk, backlog); |
| 996 | |
| 997 | lock_sock(sk); |
| 998 | |
| 999 | if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) { |
| 1000 | err = -EBADFD; |
| 1001 | goto done; |
| 1002 | } |
| 1003 | |
| 1004 | if (!l2cap_pi(sk)->psm) { |
| 1005 | bdaddr_t *src = &bt_sk(sk)->src; |
| 1006 | u16 psm; |
| 1007 | |
| 1008 | err = -EINVAL; |
| 1009 | |
| 1010 | write_lock_bh(&l2cap_sk_list.lock); |
| 1011 | |
| 1012 | for (psm = 0x1001; psm < 0x1100; psm += 2) |
Al Viro | 6dc0c20 | 2007-07-29 00:15:18 -0700 | [diff] [blame] | 1013 | if (!__l2cap_get_sock_by_addr(htobs(psm), src)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | l2cap_pi(sk)->psm = htobs(psm); |
| 1015 | l2cap_pi(sk)->sport = htobs(psm); |
| 1016 | err = 0; |
| 1017 | break; |
| 1018 | } |
| 1019 | |
| 1020 | write_unlock_bh(&l2cap_sk_list.lock); |
| 1021 | |
| 1022 | if (err < 0) |
| 1023 | goto done; |
| 1024 | } |
| 1025 | |
| 1026 | sk->sk_max_ack_backlog = backlog; |
| 1027 | sk->sk_ack_backlog = 0; |
| 1028 | sk->sk_state = BT_LISTEN; |
| 1029 | |
| 1030 | done: |
| 1031 | release_sock(sk); |
| 1032 | return err; |
| 1033 | } |
| 1034 | |
| 1035 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) |
| 1036 | { |
| 1037 | DECLARE_WAITQUEUE(wait, current); |
| 1038 | struct sock *sk = sock->sk, *nsk; |
| 1039 | long timeo; |
| 1040 | int err = 0; |
| 1041 | |
Peter Zijlstra | fcc70d5 | 2006-11-08 22:44:35 -0800 | [diff] [blame] | 1042 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | |
| 1044 | if (sk->sk_state != BT_LISTEN) { |
| 1045 | err = -EBADFD; |
| 1046 | goto done; |
| 1047 | } |
| 1048 | |
| 1049 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
| 1050 | |
| 1051 | BT_DBG("sk %p timeo %ld", sk, timeo); |
| 1052 | |
| 1053 | /* Wait for an incoming connection. (wake-one). */ |
| 1054 | add_wait_queue_exclusive(sk->sk_sleep, &wait); |
| 1055 | while (!(nsk = bt_accept_dequeue(sk, newsock))) { |
| 1056 | set_current_state(TASK_INTERRUPTIBLE); |
| 1057 | if (!timeo) { |
| 1058 | err = -EAGAIN; |
| 1059 | break; |
| 1060 | } |
| 1061 | |
| 1062 | release_sock(sk); |
| 1063 | timeo = schedule_timeout(timeo); |
Peter Zijlstra | fcc70d5 | 2006-11-08 22:44:35 -0800 | [diff] [blame] | 1064 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | |
| 1066 | if (sk->sk_state != BT_LISTEN) { |
| 1067 | err = -EBADFD; |
| 1068 | break; |
| 1069 | } |
| 1070 | |
| 1071 | if (signal_pending(current)) { |
| 1072 | err = sock_intr_errno(timeo); |
| 1073 | break; |
| 1074 | } |
| 1075 | } |
| 1076 | set_current_state(TASK_RUNNING); |
| 1077 | remove_wait_queue(sk->sk_sleep, &wait); |
| 1078 | |
| 1079 | if (err) |
| 1080 | goto done; |
| 1081 | |
| 1082 | newsock->state = SS_CONNECTED; |
| 1083 | |
| 1084 | BT_DBG("new socket %p", nsk); |
| 1085 | |
| 1086 | done: |
| 1087 | release_sock(sk); |
| 1088 | return err; |
| 1089 | } |
| 1090 | |
| 1091 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) |
| 1092 | { |
| 1093 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; |
| 1094 | struct sock *sk = sock->sk; |
| 1095 | |
| 1096 | BT_DBG("sock %p, sk %p", sock, sk); |
| 1097 | |
| 1098 | addr->sa_family = AF_BLUETOOTH; |
| 1099 | *len = sizeof(struct sockaddr_l2); |
| 1100 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1101 | if (peer) { |
| 1102 | la->l2_psm = l2cap_pi(sk)->psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1104 | la->l2_cid = htobs(l2cap_pi(sk)->dcid); |
| 1105 | } else { |
| 1106 | la->l2_psm = l2cap_pi(sk)->sport; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1107 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1108 | la->l2_cid = htobs(l2cap_pi(sk)->scid); |
| 1109 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | return 0; |
| 1112 | } |
| 1113 | |
| 1114 | static inline int l2cap_do_send(struct sock *sk, struct msghdr *msg, int len) |
| 1115 | { |
| 1116 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 1117 | struct sk_buff *skb, **frag; |
| 1118 | int err, hlen, count, sent=0; |
| 1119 | struct l2cap_hdr *lh; |
| 1120 | |
| 1121 | BT_DBG("sk %p len %d", sk, len); |
| 1122 | |
| 1123 | /* First fragment (with L2CAP header) */ |
| 1124 | if (sk->sk_type == SOCK_DGRAM) |
| 1125 | hlen = L2CAP_HDR_SIZE + 2; |
| 1126 | else |
| 1127 | hlen = L2CAP_HDR_SIZE; |
| 1128 | |
| 1129 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
| 1130 | |
| 1131 | skb = bt_skb_send_alloc(sk, hlen + count, |
| 1132 | msg->msg_flags & MSG_DONTWAIT, &err); |
| 1133 | if (!skb) |
| 1134 | return err; |
| 1135 | |
| 1136 | /* Create L2CAP header */ |
| 1137 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1138 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 1139 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | |
| 1141 | if (sk->sk_type == SOCK_DGRAM) |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 1142 | put_unaligned(l2cap_pi(sk)->psm, (__le16 *) skb_put(skb, 2)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1143 | |
| 1144 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) { |
| 1145 | err = -EFAULT; |
| 1146 | goto fail; |
| 1147 | } |
| 1148 | |
| 1149 | sent += count; |
| 1150 | len -= count; |
| 1151 | |
| 1152 | /* Continuation fragments (no L2CAP header) */ |
| 1153 | frag = &skb_shinfo(skb)->frag_list; |
| 1154 | while (len) { |
| 1155 | count = min_t(unsigned int, conn->mtu, len); |
| 1156 | |
| 1157 | *frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err); |
| 1158 | if (!*frag) |
| 1159 | goto fail; |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 1160 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) { |
| 1162 | err = -EFAULT; |
| 1163 | goto fail; |
| 1164 | } |
| 1165 | |
| 1166 | sent += count; |
| 1167 | len -= count; |
| 1168 | |
| 1169 | frag = &(*frag)->next; |
| 1170 | } |
| 1171 | |
| 1172 | if ((err = hci_send_acl(conn->hcon, skb, 0)) < 0) |
| 1173 | goto fail; |
| 1174 | |
| 1175 | return sent; |
| 1176 | |
| 1177 | fail: |
| 1178 | kfree_skb(skb); |
| 1179 | return err; |
| 1180 | } |
| 1181 | |
| 1182 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) |
| 1183 | { |
| 1184 | struct sock *sk = sock->sk; |
| 1185 | int err = 0; |
| 1186 | |
| 1187 | BT_DBG("sock %p, sk %p", sock, sk); |
| 1188 | |
Benjamin LaHaise | c1cbe4b | 2005-12-13 23:22:19 -0800 | [diff] [blame] | 1189 | err = sock_error(sk); |
| 1190 | if (err) |
| 1191 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1192 | |
| 1193 | if (msg->msg_flags & MSG_OOB) |
| 1194 | return -EOPNOTSUPP; |
| 1195 | |
| 1196 | /* Check outgoing MTU */ |
| 1197 | if (sk->sk_type != SOCK_RAW && len > l2cap_pi(sk)->omtu) |
| 1198 | return -EINVAL; |
| 1199 | |
| 1200 | lock_sock(sk); |
| 1201 | |
| 1202 | if (sk->sk_state == BT_CONNECTED) |
| 1203 | err = l2cap_do_send(sk, msg, len); |
| 1204 | else |
| 1205 | err = -ENOTCONN; |
| 1206 | |
| 1207 | release_sock(sk); |
| 1208 | return err; |
| 1209 | } |
| 1210 | |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 1211 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) |
| 1212 | { |
| 1213 | struct sock *sk = sock->sk; |
| 1214 | |
| 1215 | lock_sock(sk); |
| 1216 | |
| 1217 | if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) { |
| 1218 | struct l2cap_conn_rsp rsp; |
| 1219 | |
| 1220 | sk->sk_state = BT_CONFIG; |
| 1221 | |
| 1222 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 1223 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 1224 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); |
| 1225 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 1226 | l2cap_send_cmd(l2cap_pi(sk)->conn, l2cap_pi(sk)->ident, |
| 1227 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
| 1228 | |
| 1229 | release_sock(sk); |
| 1230 | return 0; |
| 1231 | } |
| 1232 | |
| 1233 | release_sock(sk); |
| 1234 | |
| 1235 | return bt_sock_recvmsg(iocb, sock, msg, len, flags); |
| 1236 | } |
| 1237 | |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 1238 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, int optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | { |
| 1240 | struct sock *sk = sock->sk; |
| 1241 | struct l2cap_options opts; |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1242 | int len, err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1243 | u32 opt; |
| 1244 | |
| 1245 | BT_DBG("sk %p", sk); |
| 1246 | |
| 1247 | lock_sock(sk); |
| 1248 | |
| 1249 | switch (optname) { |
| 1250 | case L2CAP_OPTIONS: |
Marcel Holtmann | 0878b66 | 2007-05-05 00:35:59 +0200 | [diff] [blame] | 1251 | opts.imtu = l2cap_pi(sk)->imtu; |
| 1252 | opts.omtu = l2cap_pi(sk)->omtu; |
| 1253 | opts.flush_to = l2cap_pi(sk)->flush_to; |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 1254 | opts.mode = L2CAP_MODE_BASIC; |
Marcel Holtmann | 0878b66 | 2007-05-05 00:35:59 +0200 | [diff] [blame] | 1255 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | len = min_t(unsigned int, sizeof(opts), optlen); |
| 1257 | if (copy_from_user((char *) &opts, optval, len)) { |
| 1258 | err = -EFAULT; |
| 1259 | break; |
| 1260 | } |
Marcel Holtmann | 0878b66 | 2007-05-05 00:35:59 +0200 | [diff] [blame] | 1261 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1262 | l2cap_pi(sk)->imtu = opts.imtu; |
| 1263 | l2cap_pi(sk)->omtu = opts.omtu; |
| 1264 | break; |
| 1265 | |
| 1266 | case L2CAP_LM: |
| 1267 | if (get_user(opt, (u32 __user *) optval)) { |
| 1268 | err = -EFAULT; |
| 1269 | break; |
| 1270 | } |
| 1271 | |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1272 | if (opt & L2CAP_LM_AUTH) |
| 1273 | l2cap_pi(sk)->sec_level = BT_SECURITY_LOW; |
| 1274 | if (opt & L2CAP_LM_ENCRYPT) |
| 1275 | l2cap_pi(sk)->sec_level = BT_SECURITY_MEDIUM; |
| 1276 | if (opt & L2CAP_LM_SECURE) |
| 1277 | l2cap_pi(sk)->sec_level = BT_SECURITY_HIGH; |
| 1278 | |
| 1279 | l2cap_pi(sk)->role_switch = (opt & L2CAP_LM_MASTER); |
| 1280 | l2cap_pi(sk)->force_reliable = (opt & L2CAP_LM_RELIABLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | break; |
| 1282 | |
| 1283 | default: |
| 1284 | err = -ENOPROTOOPT; |
| 1285 | break; |
| 1286 | } |
| 1287 | |
| 1288 | release_sock(sk); |
| 1289 | return err; |
| 1290 | } |
| 1291 | |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 1292 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen) |
| 1293 | { |
| 1294 | struct sock *sk = sock->sk; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1295 | struct bt_security sec; |
| 1296 | int len, err = 0; |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 1297 | u32 opt; |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 1298 | |
| 1299 | BT_DBG("sk %p", sk); |
| 1300 | |
| 1301 | if (level == SOL_L2CAP) |
| 1302 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); |
| 1303 | |
Marcel Holtmann | 0588d94 | 2009-01-16 10:06:13 +0100 | [diff] [blame] | 1304 | if (level != SOL_BLUETOOTH) |
| 1305 | return -ENOPROTOOPT; |
| 1306 | |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 1307 | lock_sock(sk); |
| 1308 | |
| 1309 | switch (optname) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1310 | case BT_SECURITY: |
Marcel Holtmann | 2526d3d | 2009-02-20 20:54:06 +0100 | [diff] [blame^] | 1311 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_RAW) { |
Marcel Holtmann | 0588d94 | 2009-01-16 10:06:13 +0100 | [diff] [blame] | 1312 | err = -EINVAL; |
| 1313 | break; |
| 1314 | } |
| 1315 | |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1316 | sec.level = BT_SECURITY_LOW; |
| 1317 | |
| 1318 | len = min_t(unsigned int, sizeof(sec), optlen); |
| 1319 | if (copy_from_user((char *) &sec, optval, len)) { |
| 1320 | err = -EFAULT; |
| 1321 | break; |
| 1322 | } |
| 1323 | |
| 1324 | if (sec.level < BT_SECURITY_LOW || |
| 1325 | sec.level > BT_SECURITY_HIGH) { |
| 1326 | err = -EINVAL; |
| 1327 | break; |
| 1328 | } |
| 1329 | |
| 1330 | l2cap_pi(sk)->sec_level = sec.level; |
| 1331 | break; |
| 1332 | |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 1333 | case BT_DEFER_SETUP: |
| 1334 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { |
| 1335 | err = -EINVAL; |
| 1336 | break; |
| 1337 | } |
| 1338 | |
| 1339 | if (get_user(opt, (u32 __user *) optval)) { |
| 1340 | err = -EFAULT; |
| 1341 | break; |
| 1342 | } |
| 1343 | |
| 1344 | bt_sk(sk)->defer_setup = opt; |
| 1345 | break; |
| 1346 | |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 1347 | default: |
| 1348 | err = -ENOPROTOOPT; |
| 1349 | break; |
| 1350 | } |
| 1351 | |
| 1352 | release_sock(sk); |
| 1353 | return err; |
| 1354 | } |
| 1355 | |
| 1356 | static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1357 | { |
| 1358 | struct sock *sk = sock->sk; |
| 1359 | struct l2cap_options opts; |
| 1360 | struct l2cap_conninfo cinfo; |
| 1361 | int len, err = 0; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1362 | u32 opt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | |
| 1364 | BT_DBG("sk %p", sk); |
| 1365 | |
| 1366 | if (get_user(len, optlen)) |
| 1367 | return -EFAULT; |
| 1368 | |
| 1369 | lock_sock(sk); |
| 1370 | |
| 1371 | switch (optname) { |
| 1372 | case L2CAP_OPTIONS: |
| 1373 | opts.imtu = l2cap_pi(sk)->imtu; |
| 1374 | opts.omtu = l2cap_pi(sk)->omtu; |
| 1375 | opts.flush_to = l2cap_pi(sk)->flush_to; |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 1376 | opts.mode = L2CAP_MODE_BASIC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1377 | |
| 1378 | len = min_t(unsigned int, len, sizeof(opts)); |
| 1379 | if (copy_to_user(optval, (char *) &opts, len)) |
| 1380 | err = -EFAULT; |
| 1381 | |
| 1382 | break; |
| 1383 | |
| 1384 | case L2CAP_LM: |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1385 | switch (l2cap_pi(sk)->sec_level) { |
| 1386 | case BT_SECURITY_LOW: |
| 1387 | opt = L2CAP_LM_AUTH; |
| 1388 | break; |
| 1389 | case BT_SECURITY_MEDIUM: |
| 1390 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; |
| 1391 | break; |
| 1392 | case BT_SECURITY_HIGH: |
| 1393 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | |
| 1394 | L2CAP_LM_SECURE; |
| 1395 | break; |
| 1396 | default: |
| 1397 | opt = 0; |
| 1398 | break; |
| 1399 | } |
| 1400 | |
| 1401 | if (l2cap_pi(sk)->role_switch) |
| 1402 | opt |= L2CAP_LM_MASTER; |
| 1403 | |
| 1404 | if (l2cap_pi(sk)->force_reliable) |
| 1405 | opt |= L2CAP_LM_RELIABLE; |
| 1406 | |
| 1407 | if (put_user(opt, (u32 __user *) optval)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1408 | err = -EFAULT; |
| 1409 | break; |
| 1410 | |
| 1411 | case L2CAP_CONNINFO: |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 1412 | if (sk->sk_state != BT_CONNECTED && |
| 1413 | !(sk->sk_state == BT_CONNECT2 && |
| 1414 | bt_sk(sk)->defer_setup)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1415 | err = -ENOTCONN; |
| 1416 | break; |
| 1417 | } |
| 1418 | |
| 1419 | cinfo.hci_handle = l2cap_pi(sk)->conn->hcon->handle; |
| 1420 | memcpy(cinfo.dev_class, l2cap_pi(sk)->conn->hcon->dev_class, 3); |
| 1421 | |
| 1422 | len = min_t(unsigned int, len, sizeof(cinfo)); |
| 1423 | if (copy_to_user(optval, (char *) &cinfo, len)) |
| 1424 | err = -EFAULT; |
| 1425 | |
| 1426 | break; |
| 1427 | |
| 1428 | default: |
| 1429 | err = -ENOPROTOOPT; |
| 1430 | break; |
| 1431 | } |
| 1432 | |
| 1433 | release_sock(sk); |
| 1434 | return err; |
| 1435 | } |
| 1436 | |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 1437 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
| 1438 | { |
| 1439 | struct sock *sk = sock->sk; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1440 | struct bt_security sec; |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 1441 | int len, err = 0; |
| 1442 | |
| 1443 | BT_DBG("sk %p", sk); |
| 1444 | |
| 1445 | if (level == SOL_L2CAP) |
| 1446 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); |
| 1447 | |
Marcel Holtmann | 0588d94 | 2009-01-16 10:06:13 +0100 | [diff] [blame] | 1448 | if (level != SOL_BLUETOOTH) |
| 1449 | return -ENOPROTOOPT; |
| 1450 | |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 1451 | if (get_user(len, optlen)) |
| 1452 | return -EFAULT; |
| 1453 | |
| 1454 | lock_sock(sk); |
| 1455 | |
| 1456 | switch (optname) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1457 | case BT_SECURITY: |
Marcel Holtmann | 2526d3d | 2009-02-20 20:54:06 +0100 | [diff] [blame^] | 1458 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_RAW) { |
Marcel Holtmann | 0588d94 | 2009-01-16 10:06:13 +0100 | [diff] [blame] | 1459 | err = -EINVAL; |
| 1460 | break; |
| 1461 | } |
| 1462 | |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1463 | sec.level = l2cap_pi(sk)->sec_level; |
| 1464 | |
| 1465 | len = min_t(unsigned int, len, sizeof(sec)); |
| 1466 | if (copy_to_user(optval, (char *) &sec, len)) |
| 1467 | err = -EFAULT; |
| 1468 | |
| 1469 | break; |
| 1470 | |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 1471 | case BT_DEFER_SETUP: |
| 1472 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { |
| 1473 | err = -EINVAL; |
| 1474 | break; |
| 1475 | } |
| 1476 | |
| 1477 | if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval)) |
| 1478 | err = -EFAULT; |
| 1479 | |
| 1480 | break; |
| 1481 | |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 1482 | default: |
| 1483 | err = -ENOPROTOOPT; |
| 1484 | break; |
| 1485 | } |
| 1486 | |
| 1487 | release_sock(sk); |
| 1488 | return err; |
| 1489 | } |
| 1490 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1491 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
| 1492 | { |
| 1493 | struct sock *sk = sock->sk; |
| 1494 | int err = 0; |
| 1495 | |
| 1496 | BT_DBG("sock %p, sk %p", sock, sk); |
| 1497 | |
| 1498 | if (!sk) |
| 1499 | return 0; |
| 1500 | |
| 1501 | lock_sock(sk); |
| 1502 | if (!sk->sk_shutdown) { |
| 1503 | sk->sk_shutdown = SHUTDOWN_MASK; |
| 1504 | l2cap_sock_clear_timer(sk); |
| 1505 | __l2cap_sock_close(sk, 0); |
| 1506 | |
| 1507 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 1508 | err = bt_sock_wait_state(sk, BT_CLOSED, |
| 1509 | sk->sk_lingertime); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1510 | } |
| 1511 | release_sock(sk); |
| 1512 | return err; |
| 1513 | } |
| 1514 | |
| 1515 | static int l2cap_sock_release(struct socket *sock) |
| 1516 | { |
| 1517 | struct sock *sk = sock->sk; |
| 1518 | int err; |
| 1519 | |
| 1520 | BT_DBG("sock %p, sk %p", sock, sk); |
| 1521 | |
| 1522 | if (!sk) |
| 1523 | return 0; |
| 1524 | |
| 1525 | err = l2cap_sock_shutdown(sock, 2); |
| 1526 | |
| 1527 | sock_orphan(sk); |
| 1528 | l2cap_sock_kill(sk); |
| 1529 | return err; |
| 1530 | } |
| 1531 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1532 | static void l2cap_chan_ready(struct sock *sk) |
| 1533 | { |
| 1534 | struct sock *parent = bt_sk(sk)->parent; |
| 1535 | |
| 1536 | BT_DBG("sk %p, parent %p", sk, parent); |
| 1537 | |
| 1538 | l2cap_pi(sk)->conf_state = 0; |
| 1539 | l2cap_sock_clear_timer(sk); |
| 1540 | |
| 1541 | if (!parent) { |
| 1542 | /* Outgoing channel. |
| 1543 | * Wake up socket sleeping on connect. |
| 1544 | */ |
| 1545 | sk->sk_state = BT_CONNECTED; |
| 1546 | sk->sk_state_change(sk); |
| 1547 | } else { |
| 1548 | /* Incoming channel. |
| 1549 | * Wake up socket sleeping on accept. |
| 1550 | */ |
| 1551 | parent->sk_data_ready(parent, 0); |
| 1552 | } |
| 1553 | } |
| 1554 | |
| 1555 | /* Copy frame to all raw sockets on that connection */ |
| 1556 | static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) |
| 1557 | { |
| 1558 | struct l2cap_chan_list *l = &conn->chan_list; |
| 1559 | struct sk_buff *nskb; |
| 1560 | struct sock * sk; |
| 1561 | |
| 1562 | BT_DBG("conn %p", conn); |
| 1563 | |
| 1564 | read_lock(&l->lock); |
| 1565 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
| 1566 | if (sk->sk_type != SOCK_RAW) |
| 1567 | continue; |
| 1568 | |
| 1569 | /* Don't send frame to the socket it came from */ |
| 1570 | if (skb->sk == sk) |
| 1571 | continue; |
| 1572 | |
| 1573 | if (!(nskb = skb_clone(skb, GFP_ATOMIC))) |
| 1574 | continue; |
| 1575 | |
| 1576 | if (sock_queue_rcv_skb(sk, nskb)) |
| 1577 | kfree_skb(nskb); |
| 1578 | } |
| 1579 | read_unlock(&l->lock); |
| 1580 | } |
| 1581 | |
| 1582 | /* ---- L2CAP signalling commands ---- */ |
| 1583 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, |
| 1584 | u8 code, u8 ident, u16 dlen, void *data) |
| 1585 | { |
| 1586 | struct sk_buff *skb, **frag; |
| 1587 | struct l2cap_cmd_hdr *cmd; |
| 1588 | struct l2cap_hdr *lh; |
| 1589 | int len, count; |
| 1590 | |
| 1591 | BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", conn, code, ident, dlen); |
| 1592 | |
| 1593 | len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; |
| 1594 | count = min_t(unsigned int, conn->mtu, len); |
| 1595 | |
| 1596 | skb = bt_skb_alloc(count, GFP_ATOMIC); |
| 1597 | if (!skb) |
| 1598 | return NULL; |
| 1599 | |
| 1600 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1601 | lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); |
| 1602 | lh->cid = cpu_to_le16(0x0001); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1603 | |
| 1604 | cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); |
| 1605 | cmd->code = code; |
| 1606 | cmd->ident = ident; |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1607 | cmd->len = cpu_to_le16(dlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1608 | |
| 1609 | if (dlen) { |
| 1610 | count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; |
| 1611 | memcpy(skb_put(skb, count), data, count); |
| 1612 | data += count; |
| 1613 | } |
| 1614 | |
| 1615 | len -= skb->len; |
| 1616 | |
| 1617 | /* Continuation fragments (no L2CAP header) */ |
| 1618 | frag = &skb_shinfo(skb)->frag_list; |
| 1619 | while (len) { |
| 1620 | count = min_t(unsigned int, conn->mtu, len); |
| 1621 | |
| 1622 | *frag = bt_skb_alloc(count, GFP_ATOMIC); |
| 1623 | if (!*frag) |
| 1624 | goto fail; |
| 1625 | |
| 1626 | memcpy(skb_put(*frag, count), data, count); |
| 1627 | |
| 1628 | len -= count; |
| 1629 | data += count; |
| 1630 | |
| 1631 | frag = &(*frag)->next; |
| 1632 | } |
| 1633 | |
| 1634 | return skb; |
| 1635 | |
| 1636 | fail: |
| 1637 | kfree_skb(skb); |
| 1638 | return NULL; |
| 1639 | } |
| 1640 | |
| 1641 | static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) |
| 1642 | { |
| 1643 | struct l2cap_conf_opt *opt = *ptr; |
| 1644 | int len; |
| 1645 | |
| 1646 | len = L2CAP_CONF_OPT_SIZE + opt->len; |
| 1647 | *ptr += len; |
| 1648 | |
| 1649 | *type = opt->type; |
| 1650 | *olen = opt->len; |
| 1651 | |
| 1652 | switch (opt->len) { |
| 1653 | case 1: |
| 1654 | *val = *((u8 *) opt->val); |
| 1655 | break; |
| 1656 | |
| 1657 | case 2: |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 1658 | *val = __le16_to_cpu(*((__le16 *) opt->val)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1659 | break; |
| 1660 | |
| 1661 | case 4: |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 1662 | *val = __le32_to_cpu(*((__le32 *) opt->val)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1663 | break; |
| 1664 | |
| 1665 | default: |
| 1666 | *val = (unsigned long) opt->val; |
| 1667 | break; |
| 1668 | } |
| 1669 | |
| 1670 | BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val); |
| 1671 | return len; |
| 1672 | } |
| 1673 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1674 | static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) |
| 1675 | { |
| 1676 | struct l2cap_conf_opt *opt = *ptr; |
| 1677 | |
| 1678 | BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val); |
| 1679 | |
| 1680 | opt->type = type; |
| 1681 | opt->len = len; |
| 1682 | |
| 1683 | switch (len) { |
| 1684 | case 1: |
| 1685 | *((u8 *) opt->val) = val; |
| 1686 | break; |
| 1687 | |
| 1688 | case 2: |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 1689 | *((__le16 *) opt->val) = cpu_to_le16(val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1690 | break; |
| 1691 | |
| 1692 | case 4: |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 1693 | *((__le32 *) opt->val) = cpu_to_le32(val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1694 | break; |
| 1695 | |
| 1696 | default: |
| 1697 | memcpy(opt->val, (void *) val, len); |
| 1698 | break; |
| 1699 | } |
| 1700 | |
| 1701 | *ptr += L2CAP_CONF_OPT_SIZE + len; |
| 1702 | } |
| 1703 | |
| 1704 | static int l2cap_build_conf_req(struct sock *sk, void *data) |
| 1705 | { |
| 1706 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 1707 | struct l2cap_conf_req *req = data; |
| 1708 | void *ptr = req->data; |
| 1709 | |
| 1710 | BT_DBG("sk %p", sk); |
| 1711 | |
| 1712 | if (pi->imtu != L2CAP_DEFAULT_MTU) |
| 1713 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu); |
| 1714 | |
| 1715 | /* FIXME: Need actual value of the flush timeout */ |
| 1716 | //if (flush_to != L2CAP_DEFAULT_FLUSH_TO) |
| 1717 | // l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, 2, pi->flush_to); |
| 1718 | |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1719 | req->dcid = cpu_to_le16(pi->dcid); |
| 1720 | req->flags = cpu_to_le16(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1721 | |
| 1722 | return ptr - data; |
| 1723 | } |
| 1724 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1725 | static int l2cap_parse_conf_req(struct sock *sk, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1726 | { |
| 1727 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1728 | struct l2cap_conf_rsp *rsp = data; |
| 1729 | void *ptr = rsp->data; |
| 1730 | void *req = pi->conf_req; |
| 1731 | int len = pi->conf_len; |
| 1732 | int type, hint, olen; |
| 1733 | unsigned long val; |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 1734 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 1735 | u16 mtu = L2CAP_DEFAULT_MTU; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1736 | u16 result = L2CAP_CONF_SUCCESS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1737 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1738 | BT_DBG("sk %p", sk); |
Marcel Holtmann | 820ae1b | 2006-11-18 22:15:00 +0100 | [diff] [blame] | 1739 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1740 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 1741 | len -= l2cap_get_conf_opt(&req, &type, &olen, &val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1742 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1743 | hint = type & 0x80; |
| 1744 | type &= 0x7f; |
| 1745 | |
| 1746 | switch (type) { |
| 1747 | case L2CAP_CONF_MTU: |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 1748 | mtu = val; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1749 | break; |
| 1750 | |
| 1751 | case L2CAP_CONF_FLUSH_TO: |
| 1752 | pi->flush_to = val; |
| 1753 | break; |
| 1754 | |
| 1755 | case L2CAP_CONF_QOS: |
| 1756 | break; |
| 1757 | |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 1758 | case L2CAP_CONF_RFC: |
| 1759 | if (olen == sizeof(rfc)) |
| 1760 | memcpy(&rfc, (void *) val, olen); |
| 1761 | break; |
| 1762 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1763 | default: |
| 1764 | if (hint) |
| 1765 | break; |
| 1766 | |
| 1767 | result = L2CAP_CONF_UNKNOWN; |
| 1768 | *((u8 *) ptr++) = type; |
| 1769 | break; |
| 1770 | } |
| 1771 | } |
| 1772 | |
| 1773 | if (result == L2CAP_CONF_SUCCESS) { |
| 1774 | /* Configure output options and let the other side know |
| 1775 | * which ones we don't like. */ |
| 1776 | |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 1777 | if (rfc.mode == L2CAP_MODE_BASIC) { |
| 1778 | if (mtu < pi->omtu) |
| 1779 | result = L2CAP_CONF_UNACCEPT; |
| 1780 | else { |
| 1781 | pi->omtu = mtu; |
| 1782 | pi->conf_state |= L2CAP_CONF_OUTPUT_DONE; |
| 1783 | } |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1784 | |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 1785 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); |
| 1786 | } else { |
| 1787 | result = L2CAP_CONF_UNACCEPT; |
| 1788 | |
| 1789 | memset(&rfc, 0, sizeof(rfc)); |
| 1790 | rfc.mode = L2CAP_MODE_BASIC; |
| 1791 | |
| 1792 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 1793 | sizeof(rfc), (unsigned long) &rfc); |
| 1794 | } |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1795 | } |
| 1796 | |
| 1797 | rsp->scid = cpu_to_le16(pi->dcid); |
| 1798 | rsp->result = cpu_to_le16(result); |
| 1799 | rsp->flags = cpu_to_le16(0x0000); |
| 1800 | |
| 1801 | return ptr - data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1802 | } |
| 1803 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1804 | 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] | 1805 | { |
| 1806 | struct l2cap_conf_rsp *rsp = data; |
| 1807 | void *ptr = rsp->data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1808 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1809 | BT_DBG("sk %p", sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1810 | |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1811 | rsp->scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 1812 | rsp->result = cpu_to_le16(result); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1813 | rsp->flags = cpu_to_le16(flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1814 | |
| 1815 | return ptr - data; |
| 1816 | } |
| 1817 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1818 | static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 1819 | { |
| 1820 | struct l2cap_cmd_rej *rej = (struct l2cap_cmd_rej *) data; |
| 1821 | |
| 1822 | if (rej->reason != 0x0000) |
| 1823 | return 0; |
| 1824 | |
| 1825 | if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) && |
| 1826 | cmd->ident == conn->info_ident) { |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1827 | del_timer(&conn->info_timer); |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 1828 | |
| 1829 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 1830 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 1831 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 1832 | l2cap_conn_start(conn); |
| 1833 | } |
| 1834 | |
| 1835 | return 0; |
| 1836 | } |
| 1837 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1838 | static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 1839 | { |
| 1840 | struct l2cap_chan_list *list = &conn->chan_list; |
| 1841 | struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; |
| 1842 | struct l2cap_conn_rsp rsp; |
| 1843 | struct sock *sk, *parent; |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 1844 | int result, status = L2CAP_CS_NO_INFO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1845 | |
| 1846 | u16 dcid = 0, scid = __le16_to_cpu(req->scid); |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 1847 | __le16 psm = req->psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1848 | |
| 1849 | BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid); |
| 1850 | |
| 1851 | /* Check if we have socket listening on psm */ |
| 1852 | parent = l2cap_get_sock_by_psm(BT_LISTEN, psm, conn->src); |
| 1853 | if (!parent) { |
| 1854 | result = L2CAP_CR_BAD_PSM; |
| 1855 | goto sendresp; |
| 1856 | } |
| 1857 | |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 1858 | /* Check if the ACL is secure enough (if not SDP) */ |
| 1859 | if (psm != cpu_to_le16(0x0001) && |
| 1860 | !hci_conn_check_link_mode(conn->hcon)) { |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 1861 | conn->disc_reason = 0x05; |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 1862 | result = L2CAP_CR_SEC_BLOCK; |
| 1863 | goto response; |
| 1864 | } |
| 1865 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | result = L2CAP_CR_NO_MEM; |
| 1867 | |
| 1868 | /* Check for backlog size */ |
| 1869 | if (sk_acceptq_is_full(parent)) { |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 1870 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1871 | goto response; |
| 1872 | } |
| 1873 | |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 1874 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1875 | if (!sk) |
| 1876 | goto response; |
| 1877 | |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 1878 | write_lock_bh(&list->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1879 | |
| 1880 | /* Check if we already have channel with that dcid */ |
| 1881 | if (__l2cap_get_chan_by_dcid(list, scid)) { |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 1882 | write_unlock_bh(&list->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1883 | sock_set_flag(sk, SOCK_ZAPPED); |
| 1884 | l2cap_sock_kill(sk); |
| 1885 | goto response; |
| 1886 | } |
| 1887 | |
| 1888 | hci_conn_hold(conn->hcon); |
| 1889 | |
| 1890 | l2cap_sock_init(sk, parent); |
| 1891 | bacpy(&bt_sk(sk)->src, conn->src); |
| 1892 | bacpy(&bt_sk(sk)->dst, conn->dst); |
| 1893 | l2cap_pi(sk)->psm = psm; |
| 1894 | l2cap_pi(sk)->dcid = scid; |
| 1895 | |
| 1896 | __l2cap_chan_add(conn, sk, parent); |
| 1897 | dcid = l2cap_pi(sk)->scid; |
| 1898 | |
| 1899 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); |
| 1900 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1901 | l2cap_pi(sk)->ident = cmd->ident; |
| 1902 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 1903 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1904 | if (l2cap_check_security(sk)) { |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 1905 | if (bt_sk(sk)->defer_setup) { |
| 1906 | sk->sk_state = BT_CONNECT2; |
| 1907 | result = L2CAP_CR_PEND; |
| 1908 | status = L2CAP_CS_AUTHOR_PEND; |
| 1909 | parent->sk_data_ready(parent, 0); |
| 1910 | } else { |
| 1911 | sk->sk_state = BT_CONFIG; |
| 1912 | result = L2CAP_CR_SUCCESS; |
| 1913 | status = L2CAP_CS_NO_INFO; |
| 1914 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1915 | } else { |
| 1916 | sk->sk_state = BT_CONNECT2; |
| 1917 | result = L2CAP_CR_PEND; |
| 1918 | status = L2CAP_CS_AUTHEN_PEND; |
| 1919 | } |
| 1920 | } else { |
| 1921 | sk->sk_state = BT_CONNECT2; |
| 1922 | result = L2CAP_CR_PEND; |
| 1923 | status = L2CAP_CS_NO_INFO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1924 | } |
| 1925 | |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 1926 | write_unlock_bh(&list->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1927 | |
| 1928 | response: |
| 1929 | bh_unlock_sock(parent); |
| 1930 | |
| 1931 | sendresp: |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1932 | rsp.scid = cpu_to_le16(scid); |
| 1933 | rsp.dcid = cpu_to_le16(dcid); |
| 1934 | rsp.result = cpu_to_le16(result); |
| 1935 | rsp.status = cpu_to_le16(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1936 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 1937 | |
| 1938 | if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) { |
| 1939 | struct l2cap_info_req info; |
| 1940 | info.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 1941 | |
| 1942 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; |
| 1943 | conn->info_ident = l2cap_get_ident(conn); |
| 1944 | |
| 1945 | mod_timer(&conn->info_timer, jiffies + |
| 1946 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); |
| 1947 | |
| 1948 | l2cap_send_cmd(conn, conn->info_ident, |
| 1949 | L2CAP_INFO_REQ, sizeof(info), &info); |
| 1950 | } |
| 1951 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1952 | return 0; |
| 1953 | } |
| 1954 | |
| 1955 | static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 1956 | { |
| 1957 | struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; |
| 1958 | u16 scid, dcid, result, status; |
| 1959 | struct sock *sk; |
| 1960 | u8 req[128]; |
| 1961 | |
| 1962 | scid = __le16_to_cpu(rsp->scid); |
| 1963 | dcid = __le16_to_cpu(rsp->dcid); |
| 1964 | result = __le16_to_cpu(rsp->result); |
| 1965 | status = __le16_to_cpu(rsp->status); |
| 1966 | |
| 1967 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid, scid, result, status); |
| 1968 | |
| 1969 | if (scid) { |
| 1970 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid))) |
| 1971 | return 0; |
| 1972 | } else { |
| 1973 | if (!(sk = l2cap_get_chan_by_ident(&conn->chan_list, cmd->ident))) |
| 1974 | return 0; |
| 1975 | } |
| 1976 | |
| 1977 | switch (result) { |
| 1978 | case L2CAP_CR_SUCCESS: |
| 1979 | sk->sk_state = BT_CONFIG; |
| 1980 | l2cap_pi(sk)->ident = 0; |
| 1981 | l2cap_pi(sk)->dcid = dcid; |
| 1982 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; |
| 1983 | |
Marcel Holtmann | 6a8d301 | 2009-02-06 23:56:36 +0100 | [diff] [blame] | 1984 | l2cap_pi(sk)->conf_state &= ~L2CAP_CONF_CONNECT_PEND; |
| 1985 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1986 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
| 1987 | l2cap_build_conf_req(sk, req), req); |
| 1988 | break; |
| 1989 | |
| 1990 | case L2CAP_CR_PEND: |
Marcel Holtmann | 6a8d301 | 2009-02-06 23:56:36 +0100 | [diff] [blame] | 1991 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1992 | break; |
| 1993 | |
| 1994 | default: |
| 1995 | l2cap_chan_del(sk, ECONNREFUSED); |
| 1996 | break; |
| 1997 | } |
| 1998 | |
| 1999 | bh_unlock_sock(sk); |
| 2000 | return 0; |
| 2001 | } |
| 2002 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 2003 | 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] | 2004 | { |
| 2005 | struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; |
| 2006 | u16 dcid, flags; |
| 2007 | u8 rsp[64]; |
| 2008 | struct sock *sk; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2009 | int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2010 | |
| 2011 | dcid = __le16_to_cpu(req->dcid); |
| 2012 | flags = __le16_to_cpu(req->flags); |
| 2013 | |
| 2014 | BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); |
| 2015 | |
| 2016 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid))) |
| 2017 | return -ENOENT; |
| 2018 | |
Marcel Holtmann | 354f60a | 2006-11-18 22:15:20 +0100 | [diff] [blame] | 2019 | if (sk->sk_state == BT_DISCONN) |
| 2020 | goto unlock; |
| 2021 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2022 | /* Reject if config buffer is too small. */ |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 2023 | len = cmd_len - sizeof(*req); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2024 | if (l2cap_pi(sk)->conf_len + len > sizeof(l2cap_pi(sk)->conf_req)) { |
| 2025 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
| 2026 | l2cap_build_conf_rsp(sk, rsp, |
| 2027 | L2CAP_CONF_REJECT, flags), rsp); |
| 2028 | goto unlock; |
| 2029 | } |
| 2030 | |
| 2031 | /* Store config. */ |
| 2032 | memcpy(l2cap_pi(sk)->conf_req + l2cap_pi(sk)->conf_len, req->data, len); |
| 2033 | l2cap_pi(sk)->conf_len += len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2034 | |
| 2035 | if (flags & 0x0001) { |
| 2036 | /* Incomplete config. Send empty response. */ |
| 2037 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2038 | l2cap_build_conf_rsp(sk, rsp, |
| 2039 | L2CAP_CONF_SUCCESS, 0x0001), rsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2040 | goto unlock; |
| 2041 | } |
| 2042 | |
| 2043 | /* Complete config. */ |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2044 | len = l2cap_parse_conf_req(sk, rsp); |
| 2045 | if (len < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2046 | goto unlock; |
| 2047 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2048 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); |
| 2049 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2050 | /* Reset config buffer. */ |
| 2051 | l2cap_pi(sk)->conf_len = 0; |
| 2052 | |
Marcel Holtmann | 876d948 | 2007-10-20 13:35:42 +0200 | [diff] [blame] | 2053 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE)) |
| 2054 | goto unlock; |
| 2055 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2056 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_INPUT_DONE) { |
| 2057 | sk->sk_state = BT_CONNECTED; |
| 2058 | l2cap_chan_ready(sk); |
Marcel Holtmann | 876d948 | 2007-10-20 13:35:42 +0200 | [diff] [blame] | 2059 | goto unlock; |
| 2060 | } |
| 2061 | |
| 2062 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT)) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2063 | u8 buf[64]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2064 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2065 | l2cap_build_conf_req(sk, buf), buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2066 | } |
| 2067 | |
| 2068 | unlock: |
| 2069 | bh_unlock_sock(sk); |
| 2070 | return 0; |
| 2071 | } |
| 2072 | |
| 2073 | static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2074 | { |
| 2075 | struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; |
| 2076 | u16 scid, flags, result; |
| 2077 | struct sock *sk; |
| 2078 | |
| 2079 | scid = __le16_to_cpu(rsp->scid); |
| 2080 | flags = __le16_to_cpu(rsp->flags); |
| 2081 | result = __le16_to_cpu(rsp->result); |
| 2082 | |
| 2083 | BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x", scid, flags, result); |
| 2084 | |
| 2085 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid))) |
| 2086 | return 0; |
| 2087 | |
| 2088 | switch (result) { |
| 2089 | case L2CAP_CONF_SUCCESS: |
| 2090 | break; |
| 2091 | |
| 2092 | case L2CAP_CONF_UNACCEPT: |
| 2093 | if (++l2cap_pi(sk)->conf_retry < L2CAP_CONF_MAX_RETRIES) { |
| 2094 | char req[128]; |
| 2095 | /* It does not make sense to adjust L2CAP parameters |
| 2096 | * that are currently defined in the spec. We simply |
| 2097 | * resend config request that we sent earlier. It is |
| 2098 | * stupid, but it helps qualification testing which |
| 2099 | * expects at least some response from us. */ |
| 2100 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
| 2101 | l2cap_build_conf_req(sk, req), req); |
| 2102 | goto done; |
| 2103 | } |
| 2104 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 2105 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2106 | sk->sk_state = BT_DISCONN; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 2107 | sk->sk_err = ECONNRESET; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2108 | l2cap_sock_set_timer(sk, HZ * 5); |
| 2109 | { |
| 2110 | struct l2cap_disconn_req req; |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2111 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 2112 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2113 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
| 2114 | L2CAP_DISCONN_REQ, sizeof(req), &req); |
| 2115 | } |
| 2116 | goto done; |
| 2117 | } |
| 2118 | |
| 2119 | if (flags & 0x01) |
| 2120 | goto done; |
| 2121 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2122 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_INPUT_DONE; |
| 2123 | |
| 2124 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE) { |
| 2125 | sk->sk_state = BT_CONNECTED; |
| 2126 | l2cap_chan_ready(sk); |
| 2127 | } |
| 2128 | |
| 2129 | done: |
| 2130 | bh_unlock_sock(sk); |
| 2131 | return 0; |
| 2132 | } |
| 2133 | |
| 2134 | static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2135 | { |
| 2136 | struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; |
| 2137 | struct l2cap_disconn_rsp rsp; |
| 2138 | u16 dcid, scid; |
| 2139 | struct sock *sk; |
| 2140 | |
| 2141 | scid = __le16_to_cpu(req->scid); |
| 2142 | dcid = __le16_to_cpu(req->dcid); |
| 2143 | |
| 2144 | BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); |
| 2145 | |
| 2146 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid))) |
| 2147 | return 0; |
| 2148 | |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2149 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 2150 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2151 | l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); |
| 2152 | |
| 2153 | sk->sk_shutdown = SHUTDOWN_MASK; |
| 2154 | |
| 2155 | l2cap_chan_del(sk, ECONNRESET); |
| 2156 | bh_unlock_sock(sk); |
| 2157 | |
| 2158 | l2cap_sock_kill(sk); |
| 2159 | return 0; |
| 2160 | } |
| 2161 | |
| 2162 | static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2163 | { |
| 2164 | struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; |
| 2165 | u16 dcid, scid; |
| 2166 | struct sock *sk; |
| 2167 | |
| 2168 | scid = __le16_to_cpu(rsp->scid); |
| 2169 | dcid = __le16_to_cpu(rsp->dcid); |
| 2170 | |
| 2171 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); |
| 2172 | |
| 2173 | if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, scid))) |
| 2174 | return 0; |
| 2175 | |
| 2176 | l2cap_chan_del(sk, 0); |
| 2177 | bh_unlock_sock(sk); |
| 2178 | |
| 2179 | l2cap_sock_kill(sk); |
| 2180 | return 0; |
| 2181 | } |
| 2182 | |
| 2183 | static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2184 | { |
| 2185 | struct l2cap_info_req *req = (struct l2cap_info_req *) data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2186 | u16 type; |
| 2187 | |
| 2188 | type = __le16_to_cpu(req->type); |
| 2189 | |
| 2190 | BT_DBG("type 0x%4.4x", type); |
| 2191 | |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 2192 | if (type == L2CAP_IT_FEAT_MASK) { |
| 2193 | u8 buf[8]; |
| 2194 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
| 2195 | rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 2196 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); |
| 2197 | put_unaligned(cpu_to_le32(l2cap_feat_mask), (__le32 *) rsp->data); |
| 2198 | l2cap_send_cmd(conn, cmd->ident, |
| 2199 | L2CAP_INFO_RSP, sizeof(buf), buf); |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 2200 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
| 2201 | u8 buf[12]; |
| 2202 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
| 2203 | rsp->type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); |
| 2204 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); |
| 2205 | memcpy(buf + 4, l2cap_fixed_chan, 8); |
| 2206 | l2cap_send_cmd(conn, cmd->ident, |
| 2207 | L2CAP_INFO_RSP, sizeof(buf), buf); |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 2208 | } else { |
| 2209 | struct l2cap_info_rsp rsp; |
| 2210 | rsp.type = cpu_to_le16(type); |
| 2211 | rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP); |
| 2212 | l2cap_send_cmd(conn, cmd->ident, |
| 2213 | L2CAP_INFO_RSP, sizeof(rsp), &rsp); |
| 2214 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2215 | |
| 2216 | return 0; |
| 2217 | } |
| 2218 | |
| 2219 | static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2220 | { |
| 2221 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; |
| 2222 | u16 type, result; |
| 2223 | |
| 2224 | type = __le16_to_cpu(rsp->type); |
| 2225 | result = __le16_to_cpu(rsp->result); |
| 2226 | |
| 2227 | BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); |
| 2228 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2229 | del_timer(&conn->info_timer); |
| 2230 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2231 | if (type == L2CAP_IT_FEAT_MASK) { |
Harvey Harrison | 8398531 | 2008-05-02 16:25:46 -0700 | [diff] [blame] | 2232 | conn->feat_mask = get_unaligned_le32(rsp->data); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2233 | |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 2234 | if (conn->feat_mask & 0x0080) { |
| 2235 | struct l2cap_info_req req; |
| 2236 | req.type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); |
| 2237 | |
| 2238 | conn->info_ident = l2cap_get_ident(conn); |
| 2239 | |
| 2240 | l2cap_send_cmd(conn, conn->info_ident, |
| 2241 | L2CAP_INFO_REQ, sizeof(req), &req); |
| 2242 | } else { |
| 2243 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
| 2244 | conn->info_ident = 0; |
| 2245 | |
| 2246 | l2cap_conn_start(conn); |
| 2247 | } |
| 2248 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2249 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 2250 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2251 | |
| 2252 | l2cap_conn_start(conn); |
| 2253 | } |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2254 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2255 | return 0; |
| 2256 | } |
| 2257 | |
| 2258 | static inline void l2cap_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb) |
| 2259 | { |
| 2260 | u8 *data = skb->data; |
| 2261 | int len = skb->len; |
| 2262 | struct l2cap_cmd_hdr cmd; |
| 2263 | int err = 0; |
| 2264 | |
| 2265 | l2cap_raw_recv(conn, skb); |
| 2266 | |
| 2267 | while (len >= L2CAP_CMD_HDR_SIZE) { |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 2268 | u16 cmd_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2269 | memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); |
| 2270 | data += L2CAP_CMD_HDR_SIZE; |
| 2271 | len -= L2CAP_CMD_HDR_SIZE; |
| 2272 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 2273 | cmd_len = le16_to_cpu(cmd.len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2274 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 2275 | 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] | 2276 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 2277 | if (cmd_len > len || !cmd.ident) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2278 | BT_DBG("corrupted command"); |
| 2279 | break; |
| 2280 | } |
| 2281 | |
| 2282 | switch (cmd.code) { |
| 2283 | case L2CAP_COMMAND_REJ: |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2284 | l2cap_command_rej(conn, &cmd, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2285 | break; |
| 2286 | |
| 2287 | case L2CAP_CONN_REQ: |
| 2288 | err = l2cap_connect_req(conn, &cmd, data); |
| 2289 | break; |
| 2290 | |
| 2291 | case L2CAP_CONN_RSP: |
| 2292 | err = l2cap_connect_rsp(conn, &cmd, data); |
| 2293 | break; |
| 2294 | |
| 2295 | case L2CAP_CONF_REQ: |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 2296 | err = l2cap_config_req(conn, &cmd, cmd_len, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2297 | break; |
| 2298 | |
| 2299 | case L2CAP_CONF_RSP: |
| 2300 | err = l2cap_config_rsp(conn, &cmd, data); |
| 2301 | break; |
| 2302 | |
| 2303 | case L2CAP_DISCONN_REQ: |
| 2304 | err = l2cap_disconnect_req(conn, &cmd, data); |
| 2305 | break; |
| 2306 | |
| 2307 | case L2CAP_DISCONN_RSP: |
| 2308 | err = l2cap_disconnect_rsp(conn, &cmd, data); |
| 2309 | break; |
| 2310 | |
| 2311 | case L2CAP_ECHO_REQ: |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 2312 | l2cap_send_cmd(conn, cmd.ident, L2CAP_ECHO_RSP, cmd_len, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2313 | break; |
| 2314 | |
| 2315 | case L2CAP_ECHO_RSP: |
| 2316 | break; |
| 2317 | |
| 2318 | case L2CAP_INFO_REQ: |
| 2319 | err = l2cap_information_req(conn, &cmd, data); |
| 2320 | break; |
| 2321 | |
| 2322 | case L2CAP_INFO_RSP: |
| 2323 | err = l2cap_information_rsp(conn, &cmd, data); |
| 2324 | break; |
| 2325 | |
| 2326 | default: |
| 2327 | BT_ERR("Unknown signaling command 0x%2.2x", cmd.code); |
| 2328 | err = -EINVAL; |
| 2329 | break; |
| 2330 | } |
| 2331 | |
| 2332 | if (err) { |
| 2333 | struct l2cap_cmd_rej rej; |
| 2334 | BT_DBG("error %d", err); |
| 2335 | |
| 2336 | /* FIXME: Map err to a valid reason */ |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2337 | rej.reason = cpu_to_le16(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2338 | l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); |
| 2339 | } |
| 2340 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 2341 | data += cmd_len; |
| 2342 | len -= cmd_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2343 | } |
| 2344 | |
| 2345 | kfree_skb(skb); |
| 2346 | } |
| 2347 | |
| 2348 | static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) |
| 2349 | { |
| 2350 | struct sock *sk; |
| 2351 | |
| 2352 | sk = l2cap_get_chan_by_scid(&conn->chan_list, cid); |
| 2353 | if (!sk) { |
| 2354 | BT_DBG("unknown cid 0x%4.4x", cid); |
| 2355 | goto drop; |
| 2356 | } |
| 2357 | |
| 2358 | BT_DBG("sk %p, len %d", sk, skb->len); |
| 2359 | |
| 2360 | if (sk->sk_state != BT_CONNECTED) |
| 2361 | goto drop; |
| 2362 | |
| 2363 | if (l2cap_pi(sk)->imtu < skb->len) |
| 2364 | goto drop; |
| 2365 | |
| 2366 | /* If socket recv buffers overflows we drop data here |
| 2367 | * which is *bad* because L2CAP has to be reliable. |
| 2368 | * But we don't have any other choice. L2CAP doesn't |
| 2369 | * provide flow control mechanism. */ |
| 2370 | |
| 2371 | if (!sock_queue_rcv_skb(sk, skb)) |
| 2372 | goto done; |
| 2373 | |
| 2374 | drop: |
| 2375 | kfree_skb(skb); |
| 2376 | |
| 2377 | done: |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 2378 | if (sk) |
| 2379 | bh_unlock_sock(sk); |
| 2380 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2381 | return 0; |
| 2382 | } |
| 2383 | |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 2384 | 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] | 2385 | { |
| 2386 | struct sock *sk; |
| 2387 | |
| 2388 | sk = l2cap_get_sock_by_psm(0, psm, conn->src); |
| 2389 | if (!sk) |
| 2390 | goto drop; |
| 2391 | |
| 2392 | BT_DBG("sk %p, len %d", sk, skb->len); |
| 2393 | |
| 2394 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECTED) |
| 2395 | goto drop; |
| 2396 | |
| 2397 | if (l2cap_pi(sk)->imtu < skb->len) |
| 2398 | goto drop; |
| 2399 | |
| 2400 | if (!sock_queue_rcv_skb(sk, skb)) |
| 2401 | goto done; |
| 2402 | |
| 2403 | drop: |
| 2404 | kfree_skb(skb); |
| 2405 | |
| 2406 | done: |
| 2407 | if (sk) bh_unlock_sock(sk); |
| 2408 | return 0; |
| 2409 | } |
| 2410 | |
| 2411 | static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) |
| 2412 | { |
| 2413 | struct l2cap_hdr *lh = (void *) skb->data; |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 2414 | u16 cid, len; |
| 2415 | __le16 psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2416 | |
| 2417 | skb_pull(skb, L2CAP_HDR_SIZE); |
| 2418 | cid = __le16_to_cpu(lh->cid); |
| 2419 | len = __le16_to_cpu(lh->len); |
| 2420 | |
| 2421 | BT_DBG("len %d, cid 0x%4.4x", len, cid); |
| 2422 | |
| 2423 | switch (cid) { |
| 2424 | case 0x0001: |
| 2425 | l2cap_sig_channel(conn, skb); |
| 2426 | break; |
| 2427 | |
| 2428 | case 0x0002: |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 2429 | psm = get_unaligned((__le16 *) skb->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2430 | skb_pull(skb, 2); |
| 2431 | l2cap_conless_channel(conn, psm, skb); |
| 2432 | break; |
| 2433 | |
| 2434 | default: |
| 2435 | l2cap_data_channel(conn, cid, skb); |
| 2436 | break; |
| 2437 | } |
| 2438 | } |
| 2439 | |
| 2440 | /* ---- L2CAP interface with lower layer (HCI) ---- */ |
| 2441 | |
| 2442 | static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) |
| 2443 | { |
| 2444 | int exact = 0, lm1 = 0, lm2 = 0; |
| 2445 | register struct sock *sk; |
| 2446 | struct hlist_node *node; |
| 2447 | |
| 2448 | if (type != ACL_LINK) |
| 2449 | return 0; |
| 2450 | |
| 2451 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); |
| 2452 | |
| 2453 | /* Find listening sockets and check their link_mode */ |
| 2454 | read_lock(&l2cap_sk_list.lock); |
| 2455 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
| 2456 | if (sk->sk_state != BT_LISTEN) |
| 2457 | continue; |
| 2458 | |
| 2459 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 2460 | lm1 |= HCI_LM_ACCEPT; |
| 2461 | if (l2cap_pi(sk)->role_switch) |
| 2462 | lm1 |= HCI_LM_MASTER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2463 | exact++; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 2464 | } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { |
| 2465 | lm2 |= HCI_LM_ACCEPT; |
| 2466 | if (l2cap_pi(sk)->role_switch) |
| 2467 | lm2 |= HCI_LM_MASTER; |
| 2468 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2469 | } |
| 2470 | read_unlock(&l2cap_sk_list.lock); |
| 2471 | |
| 2472 | return exact ? lm1 : lm2; |
| 2473 | } |
| 2474 | |
| 2475 | static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) |
| 2476 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 2477 | struct l2cap_conn *conn; |
| 2478 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2479 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); |
| 2480 | |
| 2481 | if (hcon->type != ACL_LINK) |
| 2482 | return 0; |
| 2483 | |
| 2484 | if (!status) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2485 | conn = l2cap_conn_add(hcon, status); |
| 2486 | if (conn) |
| 2487 | l2cap_conn_ready(conn); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 2488 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2489 | l2cap_conn_del(hcon, bt_err(status)); |
| 2490 | |
| 2491 | return 0; |
| 2492 | } |
| 2493 | |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 2494 | static int l2cap_disconn_ind(struct hci_conn *hcon) |
| 2495 | { |
| 2496 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 2497 | |
| 2498 | BT_DBG("hcon %p", hcon); |
| 2499 | |
| 2500 | if (hcon->type != ACL_LINK || !conn) |
| 2501 | return 0x13; |
| 2502 | |
| 2503 | return conn->disc_reason; |
| 2504 | } |
| 2505 | |
| 2506 | static int l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2507 | { |
| 2508 | BT_DBG("hcon %p reason %d", hcon, reason); |
| 2509 | |
| 2510 | if (hcon->type != ACL_LINK) |
| 2511 | return 0; |
| 2512 | |
| 2513 | l2cap_conn_del(hcon, bt_err(reason)); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 2514 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2515 | return 0; |
| 2516 | } |
| 2517 | |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 2518 | static inline void l2cap_check_encryption(struct sock *sk, u8 encrypt) |
| 2519 | { |
Marcel Holtmann | 255c760 | 2009-02-04 21:07:19 +0100 | [diff] [blame] | 2520 | if (sk->sk_type != SOCK_SEQPACKET) |
| 2521 | return; |
| 2522 | |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 2523 | if (encrypt == 0x00) { |
| 2524 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) { |
| 2525 | l2cap_sock_clear_timer(sk); |
| 2526 | l2cap_sock_set_timer(sk, HZ * 5); |
| 2527 | } else if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) |
| 2528 | __l2cap_sock_close(sk, ECONNREFUSED); |
| 2529 | } else { |
| 2530 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) |
| 2531 | l2cap_sock_clear_timer(sk); |
| 2532 | } |
| 2533 | } |
| 2534 | |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 2535 | static int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2536 | { |
| 2537 | struct l2cap_chan_list *l; |
Marcel Holtmann | 40be492 | 2008-07-14 20:13:50 +0200 | [diff] [blame] | 2538 | struct l2cap_conn *conn = hcon->l2cap_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2539 | struct sock *sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2540 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 2541 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2542 | return 0; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 2543 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2544 | l = &conn->chan_list; |
| 2545 | |
| 2546 | BT_DBG("conn %p", conn); |
| 2547 | |
| 2548 | read_lock(&l->lock); |
| 2549 | |
| 2550 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
| 2551 | bh_lock_sock(sk); |
| 2552 | |
Marcel Holtmann | 6a8d301 | 2009-02-06 23:56:36 +0100 | [diff] [blame] | 2553 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_CONNECT_PEND) { |
| 2554 | bh_unlock_sock(sk); |
| 2555 | continue; |
| 2556 | } |
| 2557 | |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 2558 | if (!status && (sk->sk_state == BT_CONNECTED || |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 2559 | sk->sk_state == BT_CONFIG)) { |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 2560 | l2cap_check_encryption(sk, encrypt); |
Marcel Holtmann | 9719f8a | 2008-07-14 20:13:45 +0200 | [diff] [blame] | 2561 | bh_unlock_sock(sk); |
| 2562 | continue; |
| 2563 | } |
| 2564 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 2565 | if (sk->sk_state == BT_CONNECT) { |
| 2566 | if (!status) { |
| 2567 | struct l2cap_conn_req req; |
| 2568 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 2569 | req.psm = l2cap_pi(sk)->psm; |
| 2570 | |
| 2571 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
| 2572 | |
| 2573 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
| 2574 | L2CAP_CONN_REQ, sizeof(req), &req); |
| 2575 | } else { |
| 2576 | l2cap_sock_clear_timer(sk); |
| 2577 | l2cap_sock_set_timer(sk, HZ / 10); |
| 2578 | } |
| 2579 | } else if (sk->sk_state == BT_CONNECT2) { |
| 2580 | struct l2cap_conn_rsp rsp; |
| 2581 | __u16 result; |
| 2582 | |
| 2583 | if (!status) { |
| 2584 | sk->sk_state = BT_CONFIG; |
| 2585 | result = L2CAP_CR_SUCCESS; |
| 2586 | } else { |
| 2587 | sk->sk_state = BT_DISCONN; |
| 2588 | l2cap_sock_set_timer(sk, HZ / 10); |
| 2589 | result = L2CAP_CR_SEC_BLOCK; |
| 2590 | } |
| 2591 | |
| 2592 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 2593 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 2594 | rsp.result = cpu_to_le16(result); |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2595 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 2596 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
| 2597 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2598 | } |
| 2599 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2600 | bh_unlock_sock(sk); |
| 2601 | } |
| 2602 | |
| 2603 | read_unlock(&l->lock); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 2604 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2605 | return 0; |
| 2606 | } |
| 2607 | |
| 2608 | static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) |
| 2609 | { |
| 2610 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 2611 | |
| 2612 | if (!conn && !(conn = l2cap_conn_add(hcon, 0))) |
| 2613 | goto drop; |
| 2614 | |
| 2615 | BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); |
| 2616 | |
| 2617 | if (flags & ACL_START) { |
| 2618 | struct l2cap_hdr *hdr; |
| 2619 | int len; |
| 2620 | |
| 2621 | if (conn->rx_len) { |
| 2622 | BT_ERR("Unexpected start frame (len %d)", skb->len); |
| 2623 | kfree_skb(conn->rx_skb); |
| 2624 | conn->rx_skb = NULL; |
| 2625 | conn->rx_len = 0; |
| 2626 | l2cap_conn_unreliable(conn, ECOMM); |
| 2627 | } |
| 2628 | |
| 2629 | if (skb->len < 2) { |
| 2630 | BT_ERR("Frame is too short (len %d)", skb->len); |
| 2631 | l2cap_conn_unreliable(conn, ECOMM); |
| 2632 | goto drop; |
| 2633 | } |
| 2634 | |
| 2635 | hdr = (struct l2cap_hdr *) skb->data; |
| 2636 | len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; |
| 2637 | |
| 2638 | if (len == skb->len) { |
| 2639 | /* Complete frame received */ |
| 2640 | l2cap_recv_frame(conn, skb); |
| 2641 | return 0; |
| 2642 | } |
| 2643 | |
| 2644 | BT_DBG("Start: total len %d, frag len %d", len, skb->len); |
| 2645 | |
| 2646 | if (skb->len > len) { |
| 2647 | BT_ERR("Frame is too long (len %d, expected len %d)", |
| 2648 | skb->len, len); |
| 2649 | l2cap_conn_unreliable(conn, ECOMM); |
| 2650 | goto drop; |
| 2651 | } |
| 2652 | |
| 2653 | /* Allocate skb for the complete frame (with header) */ |
| 2654 | if (!(conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC))) |
| 2655 | goto drop; |
| 2656 | |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 2657 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 2658 | skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2659 | conn->rx_len = len - skb->len; |
| 2660 | } else { |
| 2661 | BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); |
| 2662 | |
| 2663 | if (!conn->rx_len) { |
| 2664 | BT_ERR("Unexpected continuation frame (len %d)", skb->len); |
| 2665 | l2cap_conn_unreliable(conn, ECOMM); |
| 2666 | goto drop; |
| 2667 | } |
| 2668 | |
| 2669 | if (skb->len > conn->rx_len) { |
| 2670 | BT_ERR("Fragment is too long (len %d, expected %d)", |
| 2671 | skb->len, conn->rx_len); |
| 2672 | kfree_skb(conn->rx_skb); |
| 2673 | conn->rx_skb = NULL; |
| 2674 | conn->rx_len = 0; |
| 2675 | l2cap_conn_unreliable(conn, ECOMM); |
| 2676 | goto drop; |
| 2677 | } |
| 2678 | |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 2679 | skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len), |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 2680 | skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2681 | conn->rx_len -= skb->len; |
| 2682 | |
| 2683 | if (!conn->rx_len) { |
| 2684 | /* Complete frame received */ |
| 2685 | l2cap_recv_frame(conn, conn->rx_skb); |
| 2686 | conn->rx_skb = NULL; |
| 2687 | } |
| 2688 | } |
| 2689 | |
| 2690 | drop: |
| 2691 | kfree_skb(skb); |
| 2692 | return 0; |
| 2693 | } |
| 2694 | |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 2695 | static ssize_t l2cap_sysfs_show(struct class *dev, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2696 | { |
| 2697 | struct sock *sk; |
| 2698 | struct hlist_node *node; |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 2699 | char *str = buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2700 | |
| 2701 | read_lock_bh(&l2cap_sk_list.lock); |
| 2702 | |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 2703 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
| 2704 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2705 | |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 2706 | str += sprintf(str, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d %d\n", |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 2707 | batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst), |
Marcel Holtmann | 7386397 | 2007-01-22 22:00:40 +0100 | [diff] [blame] | 2708 | sk->sk_state, btohs(pi->psm), pi->scid, pi->dcid, |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 2709 | pi->imtu, pi->omtu, pi->sec_level); |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 2710 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2711 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2712 | read_unlock_bh(&l2cap_sk_list.lock); |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 2713 | |
| 2714 | return (str - buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2715 | } |
| 2716 | |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 2717 | static CLASS_ATTR(l2cap, S_IRUGO, l2cap_sysfs_show, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2718 | |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 2719 | static const struct proto_ops l2cap_sock_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2720 | .family = PF_BLUETOOTH, |
| 2721 | .owner = THIS_MODULE, |
| 2722 | .release = l2cap_sock_release, |
| 2723 | .bind = l2cap_sock_bind, |
| 2724 | .connect = l2cap_sock_connect, |
| 2725 | .listen = l2cap_sock_listen, |
| 2726 | .accept = l2cap_sock_accept, |
| 2727 | .getname = l2cap_sock_getname, |
| 2728 | .sendmsg = l2cap_sock_sendmsg, |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 2729 | .recvmsg = l2cap_sock_recvmsg, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2730 | .poll = bt_sock_poll, |
Marcel Holtmann | 3241ad8 | 2008-07-14 20:13:50 +0200 | [diff] [blame] | 2731 | .ioctl = bt_sock_ioctl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2732 | .mmap = sock_no_mmap, |
| 2733 | .socketpair = sock_no_socketpair, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2734 | .shutdown = l2cap_sock_shutdown, |
| 2735 | .setsockopt = l2cap_sock_setsockopt, |
| 2736 | .getsockopt = l2cap_sock_getsockopt |
| 2737 | }; |
| 2738 | |
| 2739 | static struct net_proto_family l2cap_sock_family_ops = { |
| 2740 | .family = PF_BLUETOOTH, |
| 2741 | .owner = THIS_MODULE, |
| 2742 | .create = l2cap_sock_create, |
| 2743 | }; |
| 2744 | |
| 2745 | static struct hci_proto l2cap_hci_proto = { |
| 2746 | .name = "L2CAP", |
| 2747 | .id = HCI_PROTO_L2CAP, |
| 2748 | .connect_ind = l2cap_connect_ind, |
| 2749 | .connect_cfm = l2cap_connect_cfm, |
| 2750 | .disconn_ind = l2cap_disconn_ind, |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 2751 | .disconn_cfm = l2cap_disconn_cfm, |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 2752 | .security_cfm = l2cap_security_cfm, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2753 | .recv_acldata = l2cap_recv_acldata |
| 2754 | }; |
| 2755 | |
| 2756 | static int __init l2cap_init(void) |
| 2757 | { |
| 2758 | int err; |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 2759 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2760 | err = proto_register(&l2cap_proto, 0); |
| 2761 | if (err < 0) |
| 2762 | return err; |
| 2763 | |
| 2764 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); |
| 2765 | if (err < 0) { |
| 2766 | BT_ERR("L2CAP socket registration failed"); |
| 2767 | goto error; |
| 2768 | } |
| 2769 | |
| 2770 | err = hci_register_proto(&l2cap_hci_proto); |
| 2771 | if (err < 0) { |
| 2772 | BT_ERR("L2CAP protocol registration failed"); |
| 2773 | bt_sock_unregister(BTPROTO_L2CAP); |
| 2774 | goto error; |
| 2775 | } |
| 2776 | |
Marcel Holtmann | df5c37e | 2006-10-15 17:30:45 +0200 | [diff] [blame] | 2777 | if (class_create_file(bt_class, &class_attr_l2cap) < 0) |
| 2778 | BT_ERR("Failed to create L2CAP info file"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2779 | |
| 2780 | BT_INFO("L2CAP ver %s", VERSION); |
| 2781 | BT_INFO("L2CAP socket layer initialized"); |
| 2782 | |
| 2783 | return 0; |
| 2784 | |
| 2785 | error: |
| 2786 | proto_unregister(&l2cap_proto); |
| 2787 | return err; |
| 2788 | } |
| 2789 | |
| 2790 | static void __exit l2cap_exit(void) |
| 2791 | { |
Marcel Holtmann | a91f2e3 | 2006-07-03 10:02:41 +0200 | [diff] [blame] | 2792 | class_remove_file(bt_class, &class_attr_l2cap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2793 | |
| 2794 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) |
| 2795 | BT_ERR("L2CAP socket unregistration failed"); |
| 2796 | |
| 2797 | if (hci_unregister_proto(&l2cap_hci_proto) < 0) |
| 2798 | BT_ERR("L2CAP protocol unregistration failed"); |
| 2799 | |
| 2800 | proto_unregister(&l2cap_proto); |
| 2801 | } |
| 2802 | |
| 2803 | void l2cap_load(void) |
| 2804 | { |
| 2805 | /* Dummy function to trigger automatic L2CAP module loading by |
| 2806 | * other modules that use L2CAP sockets but don't use any other |
| 2807 | * symbols from it. */ |
| 2808 | return; |
| 2809 | } |
| 2810 | EXPORT_SYMBOL(l2cap_load); |
| 2811 | |
| 2812 | module_init(l2cap_init); |
| 2813 | module_exit(l2cap_exit); |
| 2814 | |
Marcel Holtmann | 63fbd24 | 2008-08-18 13:23:53 +0200 | [diff] [blame] | 2815 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2816 | MODULE_DESCRIPTION("Bluetooth L2CAP ver " VERSION); |
| 2817 | MODULE_VERSION(VERSION); |
| 2818 | MODULE_LICENSE("GPL"); |
| 2819 | MODULE_ALIAS("bt-proto-0"); |