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> |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 43 | #include <linux/uaccess.h> |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 44 | #include <linux/crc16.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include <net/sock.h> |
| 46 | |
| 47 | #include <asm/system.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | #include <asm/unaligned.h> |
| 49 | |
| 50 | #include <net/bluetooth/bluetooth.h> |
| 51 | #include <net/bluetooth/hci_core.h> |
| 52 | #include <net/bluetooth/l2cap.h> |
| 53 | |
Marcel Holtmann | 44dd46d | 2009-05-02 19:09:01 -0700 | [diff] [blame] | 54 | #define VERSION "2.14" |
| 55 | |
| 56 | static int enable_ertm = 0; |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 57 | |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 58 | static u32 l2cap_feat_mask = L2CAP_FEAT_FIXED_CHAN; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 59 | static u8 l2cap_fixed_chan[8] = { 0x02, }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 61 | static const struct proto_ops l2cap_sock_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | |
| 63 | static struct bt_sock_list l2cap_sk_list = { |
Robert P. J. Day | d5fb296 | 2008-03-28 16:17:38 -0700 | [diff] [blame] | 64 | .lock = __RW_LOCK_UNLOCKED(l2cap_sk_list.lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | }; |
| 66 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | static void __l2cap_sock_close(struct sock *sk, int reason); |
| 68 | static void l2cap_sock_close(struct sock *sk); |
| 69 | static void l2cap_sock_kill(struct sock *sk); |
| 70 | |
| 71 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, |
| 72 | u8 code, u8 ident, u16 dlen, void *data); |
| 73 | |
| 74 | /* ---- L2CAP timers ---- */ |
| 75 | static void l2cap_sock_timeout(unsigned long arg) |
| 76 | { |
| 77 | struct sock *sk = (struct sock *) arg; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 78 | int reason; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | |
| 80 | BT_DBG("sock %p state %d", sk, sk->sk_state); |
| 81 | |
| 82 | bh_lock_sock(sk); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 83 | |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 84 | if (sk->sk_state == BT_CONNECTED || sk->sk_state == BT_CONFIG) |
| 85 | reason = ECONNREFUSED; |
| 86 | else if (sk->sk_state == BT_CONNECT && |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 87 | l2cap_pi(sk)->sec_level != BT_SECURITY_SDP) |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 88 | reason = ECONNREFUSED; |
| 89 | else |
| 90 | reason = ETIMEDOUT; |
| 91 | |
| 92 | __l2cap_sock_close(sk, reason); |
| 93 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | bh_unlock_sock(sk); |
| 95 | |
| 96 | l2cap_sock_kill(sk); |
| 97 | sock_put(sk); |
| 98 | } |
| 99 | |
| 100 | static void l2cap_sock_set_timer(struct sock *sk, long timeout) |
| 101 | { |
| 102 | BT_DBG("sk %p state %d timeout %ld", sk, sk->sk_state, timeout); |
| 103 | sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout); |
| 104 | } |
| 105 | |
| 106 | static void l2cap_sock_clear_timer(struct sock *sk) |
| 107 | { |
| 108 | BT_DBG("sock %p state %d", sk, sk->sk_state); |
| 109 | sk_stop_timer(sk, &sk->sk_timer); |
| 110 | } |
| 111 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 112 | /* ---- L2CAP channels ---- */ |
| 113 | static struct sock *__l2cap_get_chan_by_dcid(struct l2cap_chan_list *l, u16 cid) |
| 114 | { |
| 115 | struct sock *s; |
| 116 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { |
| 117 | if (l2cap_pi(s)->dcid == cid) |
| 118 | break; |
| 119 | } |
| 120 | return s; |
| 121 | } |
| 122 | |
| 123 | static struct sock *__l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) |
| 124 | { |
| 125 | struct sock *s; |
| 126 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { |
| 127 | if (l2cap_pi(s)->scid == cid) |
| 128 | break; |
| 129 | } |
| 130 | return s; |
| 131 | } |
| 132 | |
| 133 | /* Find channel with given SCID. |
| 134 | * Returns locked socket */ |
| 135 | static inline struct sock *l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid) |
| 136 | { |
| 137 | struct sock *s; |
| 138 | read_lock(&l->lock); |
| 139 | s = __l2cap_get_chan_by_scid(l, cid); |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 140 | if (s) |
| 141 | bh_lock_sock(s); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 142 | read_unlock(&l->lock); |
| 143 | return s; |
| 144 | } |
| 145 | |
| 146 | static struct sock *__l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) |
| 147 | { |
| 148 | struct sock *s; |
| 149 | for (s = l->head; s; s = l2cap_pi(s)->next_c) { |
| 150 | if (l2cap_pi(s)->ident == ident) |
| 151 | break; |
| 152 | } |
| 153 | return s; |
| 154 | } |
| 155 | |
| 156 | static inline struct sock *l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident) |
| 157 | { |
| 158 | struct sock *s; |
| 159 | read_lock(&l->lock); |
| 160 | s = __l2cap_get_chan_by_ident(l, ident); |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 161 | if (s) |
| 162 | bh_lock_sock(s); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 163 | read_unlock(&l->lock); |
| 164 | return s; |
| 165 | } |
| 166 | |
| 167 | static u16 l2cap_alloc_cid(struct l2cap_chan_list *l) |
| 168 | { |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 169 | u16 cid = L2CAP_CID_DYN_START; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 170 | |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 171 | for (; cid < L2CAP_CID_DYN_END; cid++) { |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 172 | if (!__l2cap_get_chan_by_scid(l, cid)) |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 173 | return cid; |
| 174 | } |
| 175 | |
| 176 | return 0; |
| 177 | } |
| 178 | |
| 179 | static inline void __l2cap_chan_link(struct l2cap_chan_list *l, struct sock *sk) |
| 180 | { |
| 181 | sock_hold(sk); |
| 182 | |
| 183 | if (l->head) |
| 184 | l2cap_pi(l->head)->prev_c = sk; |
| 185 | |
| 186 | l2cap_pi(sk)->next_c = l->head; |
| 187 | l2cap_pi(sk)->prev_c = NULL; |
| 188 | l->head = sk; |
| 189 | } |
| 190 | |
| 191 | static inline void l2cap_chan_unlink(struct l2cap_chan_list *l, struct sock *sk) |
| 192 | { |
| 193 | struct sock *next = l2cap_pi(sk)->next_c, *prev = l2cap_pi(sk)->prev_c; |
| 194 | |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 195 | write_lock_bh(&l->lock); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 196 | if (sk == l->head) |
| 197 | l->head = next; |
| 198 | |
| 199 | if (next) |
| 200 | l2cap_pi(next)->prev_c = prev; |
| 201 | if (prev) |
| 202 | l2cap_pi(prev)->next_c = next; |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 203 | write_unlock_bh(&l->lock); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 204 | |
| 205 | __sock_put(sk); |
| 206 | } |
| 207 | |
| 208 | static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) |
| 209 | { |
| 210 | struct l2cap_chan_list *l = &conn->chan_list; |
| 211 | |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 212 | BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn, |
| 213 | l2cap_pi(sk)->psm, l2cap_pi(sk)->dcid); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 214 | |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 215 | conn->disc_reason = 0x13; |
| 216 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 217 | l2cap_pi(sk)->conn = conn; |
| 218 | |
| 219 | if (sk->sk_type == SOCK_SEQPACKET) { |
| 220 | /* Alloc CID for connection-oriented socket */ |
| 221 | l2cap_pi(sk)->scid = l2cap_alloc_cid(l); |
| 222 | } else if (sk->sk_type == SOCK_DGRAM) { |
| 223 | /* Connectionless socket */ |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 224 | l2cap_pi(sk)->scid = L2CAP_CID_CONN_LESS; |
| 225 | l2cap_pi(sk)->dcid = L2CAP_CID_CONN_LESS; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 226 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; |
| 227 | } else { |
| 228 | /* Raw socket can send/recv signalling messages only */ |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 229 | l2cap_pi(sk)->scid = L2CAP_CID_SIGNALING; |
| 230 | l2cap_pi(sk)->dcid = L2CAP_CID_SIGNALING; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 231 | l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU; |
| 232 | } |
| 233 | |
| 234 | __l2cap_chan_link(l, sk); |
| 235 | |
| 236 | if (parent) |
| 237 | bt_accept_enqueue(parent, sk); |
| 238 | } |
| 239 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 240 | /* Delete channel. |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 241 | * Must be called on the locked socket. */ |
| 242 | static void l2cap_chan_del(struct sock *sk, int err) |
| 243 | { |
| 244 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 245 | struct sock *parent = bt_sk(sk)->parent; |
| 246 | |
| 247 | l2cap_sock_clear_timer(sk); |
| 248 | |
| 249 | BT_DBG("sk %p, conn %p, err %d", sk, conn, err); |
| 250 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 251 | if (conn) { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 252 | /* Unlink from channel list */ |
| 253 | l2cap_chan_unlink(&conn->chan_list, sk); |
| 254 | l2cap_pi(sk)->conn = NULL; |
| 255 | hci_conn_put(conn->hcon); |
| 256 | } |
| 257 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 258 | sk->sk_state = BT_CLOSED; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 259 | sock_set_flag(sk, SOCK_ZAPPED); |
| 260 | |
| 261 | if (err) |
| 262 | sk->sk_err = err; |
| 263 | |
| 264 | if (parent) { |
| 265 | bt_accept_unlink(sk); |
| 266 | parent->sk_data_ready(parent, 0); |
| 267 | } else |
| 268 | sk->sk_state_change(sk); |
| 269 | } |
| 270 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 271 | /* Service level security */ |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 272 | static inline int l2cap_check_security(struct sock *sk) |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 273 | { |
| 274 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
Marcel Holtmann | 0684e5f | 2009-02-09 02:48:38 +0100 | [diff] [blame] | 275 | __u8 auth_type; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 276 | |
Marcel Holtmann | 00ae4af | 2009-02-12 16:19:45 +0100 | [diff] [blame] | 277 | if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
| 278 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) |
| 279 | auth_type = HCI_AT_NO_BONDING_MITM; |
| 280 | else |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 281 | auth_type = HCI_AT_NO_BONDING; |
Marcel Holtmann | 00ae4af | 2009-02-12 16:19:45 +0100 | [diff] [blame] | 282 | |
| 283 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) |
| 284 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; |
| 285 | } else { |
| 286 | switch (l2cap_pi(sk)->sec_level) { |
| 287 | case BT_SECURITY_HIGH: |
| 288 | auth_type = HCI_AT_GENERAL_BONDING_MITM; |
| 289 | break; |
| 290 | case BT_SECURITY_MEDIUM: |
| 291 | auth_type = HCI_AT_GENERAL_BONDING; |
| 292 | break; |
| 293 | default: |
| 294 | auth_type = HCI_AT_NO_BONDING; |
| 295 | break; |
| 296 | } |
Marcel Holtmann | 0684e5f | 2009-02-09 02:48:38 +0100 | [diff] [blame] | 297 | } |
| 298 | |
| 299 | return hci_conn_security(conn->hcon, l2cap_pi(sk)->sec_level, |
| 300 | auth_type); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 301 | } |
| 302 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 303 | static inline u8 l2cap_get_ident(struct l2cap_conn *conn) |
| 304 | { |
| 305 | u8 id; |
| 306 | |
| 307 | /* Get next available identificator. |
| 308 | * 1 - 128 are used by kernel. |
| 309 | * 129 - 199 are reserved. |
| 310 | * 200 - 254 are used by utilities like l2ping, etc. |
| 311 | */ |
| 312 | |
| 313 | spin_lock_bh(&conn->lock); |
| 314 | |
| 315 | if (++conn->tx_ident > 128) |
| 316 | conn->tx_ident = 1; |
| 317 | |
| 318 | id = conn->tx_ident; |
| 319 | |
| 320 | spin_unlock_bh(&conn->lock); |
| 321 | |
| 322 | return id; |
| 323 | } |
| 324 | |
| 325 | static inline int l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, void *data) |
| 326 | { |
| 327 | struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data); |
| 328 | |
| 329 | BT_DBG("code 0x%2.2x", code); |
| 330 | |
| 331 | if (!skb) |
| 332 | return -ENOMEM; |
| 333 | |
| 334 | return hci_send_acl(conn->hcon, skb, 0); |
| 335 | } |
| 336 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 337 | static inline int l2cap_send_sframe(struct l2cap_pinfo *pi, u16 control) |
| 338 | { |
| 339 | struct sk_buff *skb; |
| 340 | struct l2cap_hdr *lh; |
| 341 | struct l2cap_conn *conn = pi->conn; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 342 | int count, hlen = L2CAP_HDR_SIZE + 2; |
| 343 | |
| 344 | if (pi->fcs == L2CAP_FCS_CRC16) |
| 345 | hlen += 2; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 346 | |
| 347 | BT_DBG("pi %p, control 0x%2.2x", pi, control); |
| 348 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 349 | count = min_t(unsigned int, conn->mtu, hlen); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 350 | control |= L2CAP_CTRL_FRAME_TYPE; |
| 351 | |
| 352 | skb = bt_skb_alloc(count, GFP_ATOMIC); |
| 353 | if (!skb) |
| 354 | return -ENOMEM; |
| 355 | |
| 356 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 357 | lh->len = cpu_to_le16(hlen - L2CAP_HDR_SIZE); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 358 | lh->cid = cpu_to_le16(pi->dcid); |
| 359 | put_unaligned_le16(control, skb_put(skb, 2)); |
| 360 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 361 | if (pi->fcs == L2CAP_FCS_CRC16) { |
| 362 | u16 fcs = crc16(0, (u8 *)lh, count - 2); |
| 363 | put_unaligned_le16(fcs, skb_put(skb, 2)); |
| 364 | } |
| 365 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 366 | return hci_send_acl(pi->conn->hcon, skb, 0); |
| 367 | } |
| 368 | |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 369 | static inline int l2cap_send_rr_or_rnr(struct l2cap_pinfo *pi, u16 control) |
| 370 | { |
| 371 | if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) |
| 372 | control |= L2CAP_SUPER_RCV_NOT_READY; |
| 373 | else |
| 374 | control |= L2CAP_SUPER_RCV_READY; |
| 375 | |
| 376 | return l2cap_send_sframe(pi, control); |
| 377 | } |
| 378 | |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 379 | static void l2cap_do_start(struct sock *sk) |
| 380 | { |
| 381 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 382 | |
| 383 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) { |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 384 | if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE)) |
| 385 | return; |
| 386 | |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 387 | if (l2cap_check_security(sk)) { |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 388 | struct l2cap_conn_req req; |
| 389 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 390 | req.psm = l2cap_pi(sk)->psm; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 391 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 392 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 393 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 394 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 395 | L2CAP_CONN_REQ, sizeof(req), &req); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 396 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 397 | } else { |
| 398 | struct l2cap_info_req req; |
| 399 | req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 400 | |
| 401 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; |
| 402 | conn->info_ident = l2cap_get_ident(conn); |
| 403 | |
| 404 | mod_timer(&conn->info_timer, jiffies + |
| 405 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); |
| 406 | |
| 407 | l2cap_send_cmd(conn, conn->info_ident, |
| 408 | L2CAP_INFO_REQ, sizeof(req), &req); |
| 409 | } |
| 410 | } |
| 411 | |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 412 | static void l2cap_send_disconn_req(struct l2cap_conn *conn, struct sock *sk) |
| 413 | { |
| 414 | struct l2cap_disconn_req req; |
| 415 | |
| 416 | req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 417 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 418 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
| 419 | L2CAP_DISCONN_REQ, sizeof(req), &req); |
| 420 | } |
| 421 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | /* ---- L2CAP connections ---- */ |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 423 | static void l2cap_conn_start(struct l2cap_conn *conn) |
| 424 | { |
| 425 | struct l2cap_chan_list *l = &conn->chan_list; |
| 426 | struct sock *sk; |
| 427 | |
| 428 | BT_DBG("conn %p", conn); |
| 429 | |
| 430 | read_lock(&l->lock); |
| 431 | |
| 432 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
| 433 | bh_lock_sock(sk); |
| 434 | |
| 435 | if (sk->sk_type != SOCK_SEQPACKET) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 436 | bh_unlock_sock(sk); |
| 437 | continue; |
| 438 | } |
| 439 | |
| 440 | if (sk->sk_state == BT_CONNECT) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 441 | if (l2cap_check_security(sk)) { |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 442 | struct l2cap_conn_req req; |
| 443 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 444 | req.psm = l2cap_pi(sk)->psm; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 445 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 446 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 447 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 448 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 449 | L2CAP_CONN_REQ, sizeof(req), &req); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 450 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 451 | } else if (sk->sk_state == BT_CONNECT2) { |
| 452 | struct l2cap_conn_rsp rsp; |
| 453 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 454 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 455 | |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 456 | if (l2cap_check_security(sk)) { |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 457 | if (bt_sk(sk)->defer_setup) { |
| 458 | struct sock *parent = bt_sk(sk)->parent; |
| 459 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); |
| 460 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHOR_PEND); |
| 461 | parent->sk_data_ready(parent, 0); |
| 462 | |
| 463 | } else { |
| 464 | sk->sk_state = BT_CONFIG; |
| 465 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); |
| 466 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 467 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 468 | } else { |
| 469 | rsp.result = cpu_to_le16(L2CAP_CR_PEND); |
| 470 | rsp.status = cpu_to_le16(L2CAP_CS_AUTHEN_PEND); |
| 471 | } |
| 472 | |
| 473 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
| 474 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
| 475 | } |
| 476 | |
| 477 | bh_unlock_sock(sk); |
| 478 | } |
| 479 | |
| 480 | read_unlock(&l->lock); |
| 481 | } |
| 482 | |
| 483 | static void l2cap_conn_ready(struct l2cap_conn *conn) |
| 484 | { |
| 485 | struct l2cap_chan_list *l = &conn->chan_list; |
| 486 | struct sock *sk; |
| 487 | |
| 488 | BT_DBG("conn %p", conn); |
| 489 | |
| 490 | read_lock(&l->lock); |
| 491 | |
| 492 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
| 493 | bh_lock_sock(sk); |
| 494 | |
| 495 | if (sk->sk_type != SOCK_SEQPACKET) { |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 496 | l2cap_sock_clear_timer(sk); |
| 497 | sk->sk_state = BT_CONNECTED; |
| 498 | sk->sk_state_change(sk); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 499 | } else if (sk->sk_state == BT_CONNECT) |
| 500 | l2cap_do_start(sk); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 501 | |
| 502 | bh_unlock_sock(sk); |
| 503 | } |
| 504 | |
| 505 | read_unlock(&l->lock); |
| 506 | } |
| 507 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 508 | /* Notify sockets that we cannot guaranty reliability anymore */ |
| 509 | static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err) |
| 510 | { |
| 511 | struct l2cap_chan_list *l = &conn->chan_list; |
| 512 | struct sock *sk; |
| 513 | |
| 514 | BT_DBG("conn %p", conn); |
| 515 | |
| 516 | read_lock(&l->lock); |
| 517 | |
| 518 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 519 | if (l2cap_pi(sk)->force_reliable) |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 520 | sk->sk_err = err; |
| 521 | } |
| 522 | |
| 523 | read_unlock(&l->lock); |
| 524 | } |
| 525 | |
| 526 | static void l2cap_info_timeout(unsigned long arg) |
| 527 | { |
| 528 | struct l2cap_conn *conn = (void *) arg; |
| 529 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 530 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 531 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 532 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 533 | l2cap_conn_start(conn); |
| 534 | } |
| 535 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status) |
| 537 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 538 | struct l2cap_conn *conn = hcon->l2cap_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 540 | if (conn || status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | return conn; |
| 542 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 543 | conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC); |
| 544 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | |
| 547 | hcon->l2cap_data = conn; |
| 548 | conn->hcon = hcon; |
| 549 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 550 | BT_DBG("hcon %p conn %p", hcon, conn); |
| 551 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | conn->mtu = hcon->hdev->acl_mtu; |
| 553 | conn->src = &hcon->hdev->bdaddr; |
| 554 | conn->dst = &hcon->dst; |
| 555 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 556 | conn->feat_mask = 0; |
| 557 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | spin_lock_init(&conn->lock); |
| 559 | rwlock_init(&conn->chan_list.lock); |
| 560 | |
Dave Young | 45054dc | 2009-10-18 20:28:30 +0000 | [diff] [blame] | 561 | setup_timer(&conn->info_timer, l2cap_info_timeout, |
| 562 | (unsigned long) conn); |
| 563 | |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 564 | conn->disc_reason = 0x13; |
| 565 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | return conn; |
| 567 | } |
| 568 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 569 | static void l2cap_conn_del(struct hci_conn *hcon, int err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 571 | struct l2cap_conn *conn = hcon->l2cap_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | struct sock *sk; |
| 573 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 574 | if (!conn) |
| 575 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | |
| 577 | BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); |
| 578 | |
Wei Yongjun | 7585b97 | 2009-02-25 18:29:52 +0800 | [diff] [blame] | 579 | kfree_skb(conn->rx_skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | |
| 581 | /* Kill channels */ |
| 582 | while ((sk = conn->chan_list.head)) { |
| 583 | bh_lock_sock(sk); |
| 584 | l2cap_chan_del(sk, err); |
| 585 | bh_unlock_sock(sk); |
| 586 | l2cap_sock_kill(sk); |
| 587 | } |
| 588 | |
Dave Young | 8e8440f | 2008-03-03 12:18:55 -0800 | [diff] [blame] | 589 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) |
| 590 | del_timer_sync(&conn->info_timer); |
Thomas Gleixner | 3ab2273 | 2008-02-26 17:42:56 -0800 | [diff] [blame] | 591 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | hcon->l2cap_data = NULL; |
| 593 | kfree(conn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | } |
| 595 | |
| 596 | static inline void l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent) |
| 597 | { |
| 598 | struct l2cap_chan_list *l = &conn->chan_list; |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 599 | write_lock_bh(&l->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | __l2cap_chan_add(conn, sk, parent); |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 601 | write_unlock_bh(&l->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | } |
| 603 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | /* ---- Socket interface ---- */ |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 605 | 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] | 606 | { |
| 607 | struct sock *sk; |
| 608 | struct hlist_node *node; |
| 609 | sk_for_each(sk, node, &l2cap_sk_list.head) |
| 610 | if (l2cap_pi(sk)->sport == psm && !bacmp(&bt_sk(sk)->src, src)) |
| 611 | goto found; |
| 612 | sk = NULL; |
| 613 | found: |
| 614 | return sk; |
| 615 | } |
| 616 | |
| 617 | /* Find socket with psm and source bdaddr. |
| 618 | * Returns closest match. |
| 619 | */ |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 620 | 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] | 621 | { |
| 622 | struct sock *sk = NULL, *sk1 = NULL; |
| 623 | struct hlist_node *node; |
| 624 | |
| 625 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
| 626 | if (state && sk->sk_state != state) |
| 627 | continue; |
| 628 | |
| 629 | if (l2cap_pi(sk)->psm == psm) { |
| 630 | /* Exact match. */ |
| 631 | if (!bacmp(&bt_sk(sk)->src, src)) |
| 632 | break; |
| 633 | |
| 634 | /* Closest match */ |
| 635 | if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) |
| 636 | sk1 = sk; |
| 637 | } |
| 638 | } |
| 639 | return node ? sk : sk1; |
| 640 | } |
| 641 | |
| 642 | /* Find socket with given address (psm, src). |
| 643 | * Returns locked socket */ |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 644 | 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] | 645 | { |
| 646 | struct sock *s; |
| 647 | read_lock(&l2cap_sk_list.lock); |
| 648 | s = __l2cap_get_sock_by_psm(state, psm, src); |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 649 | if (s) |
| 650 | bh_lock_sock(s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | read_unlock(&l2cap_sk_list.lock); |
| 652 | return s; |
| 653 | } |
| 654 | |
| 655 | static void l2cap_sock_destruct(struct sock *sk) |
| 656 | { |
| 657 | BT_DBG("sk %p", sk); |
| 658 | |
| 659 | skb_queue_purge(&sk->sk_receive_queue); |
| 660 | skb_queue_purge(&sk->sk_write_queue); |
| 661 | } |
| 662 | |
| 663 | static void l2cap_sock_cleanup_listen(struct sock *parent) |
| 664 | { |
| 665 | struct sock *sk; |
| 666 | |
| 667 | BT_DBG("parent %p", parent); |
| 668 | |
| 669 | /* Close not yet accepted channels */ |
| 670 | while ((sk = bt_accept_dequeue(parent, NULL))) |
| 671 | l2cap_sock_close(sk); |
| 672 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 673 | parent->sk_state = BT_CLOSED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | sock_set_flag(parent, SOCK_ZAPPED); |
| 675 | } |
| 676 | |
| 677 | /* Kill socket (only if zapped and orphan) |
| 678 | * Must be called on unlocked socket. |
| 679 | */ |
| 680 | static void l2cap_sock_kill(struct sock *sk) |
| 681 | { |
| 682 | if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) |
| 683 | return; |
| 684 | |
| 685 | BT_DBG("sk %p state %d", sk, sk->sk_state); |
| 686 | |
| 687 | /* Kill poor orphan */ |
| 688 | bt_sock_unlink(&l2cap_sk_list, sk); |
| 689 | sock_set_flag(sk, SOCK_DEAD); |
| 690 | sock_put(sk); |
| 691 | } |
| 692 | |
| 693 | static void __l2cap_sock_close(struct sock *sk, int reason) |
| 694 | { |
| 695 | BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); |
| 696 | |
| 697 | switch (sk->sk_state) { |
| 698 | case BT_LISTEN: |
| 699 | l2cap_sock_cleanup_listen(sk); |
| 700 | break; |
| 701 | |
| 702 | case BT_CONNECTED: |
| 703 | case BT_CONFIG: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | if (sk->sk_type == SOCK_SEQPACKET) { |
| 705 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | |
| 707 | sk->sk_state = BT_DISCONN; |
| 708 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 709 | l2cap_send_disconn_req(conn, sk); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 710 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | l2cap_chan_del(sk, reason); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | break; |
| 713 | |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 714 | case BT_CONNECT2: |
| 715 | if (sk->sk_type == SOCK_SEQPACKET) { |
| 716 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 717 | struct l2cap_conn_rsp rsp; |
| 718 | __u16 result; |
| 719 | |
| 720 | if (bt_sk(sk)->defer_setup) |
| 721 | result = L2CAP_CR_SEC_BLOCK; |
| 722 | else |
| 723 | result = L2CAP_CR_BAD_PSM; |
| 724 | |
| 725 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 726 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 727 | rsp.result = cpu_to_le16(result); |
| 728 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 729 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
| 730 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
| 731 | } else |
| 732 | l2cap_chan_del(sk, reason); |
| 733 | break; |
| 734 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | case BT_CONNECT: |
| 736 | case BT_DISCONN: |
| 737 | l2cap_chan_del(sk, reason); |
| 738 | break; |
| 739 | |
| 740 | default: |
| 741 | sock_set_flag(sk, SOCK_ZAPPED); |
| 742 | break; |
| 743 | } |
| 744 | } |
| 745 | |
| 746 | /* Must be called on unlocked socket. */ |
| 747 | static void l2cap_sock_close(struct sock *sk) |
| 748 | { |
| 749 | l2cap_sock_clear_timer(sk); |
| 750 | lock_sock(sk); |
| 751 | __l2cap_sock_close(sk, ECONNRESET); |
| 752 | release_sock(sk); |
| 753 | l2cap_sock_kill(sk); |
| 754 | } |
| 755 | |
| 756 | static void l2cap_sock_init(struct sock *sk, struct sock *parent) |
| 757 | { |
| 758 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 759 | |
| 760 | BT_DBG("sk %p", sk); |
| 761 | |
| 762 | if (parent) { |
| 763 | sk->sk_type = parent->sk_type; |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 764 | bt_sk(sk)->defer_setup = bt_sk(parent)->defer_setup; |
| 765 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | pi->imtu = l2cap_pi(parent)->imtu; |
| 767 | pi->omtu = l2cap_pi(parent)->omtu; |
Marcel Holtmann | c6b03cf | 2009-05-02 22:31:10 -0700 | [diff] [blame] | 768 | pi->mode = l2cap_pi(parent)->mode; |
| 769 | pi->fcs = l2cap_pi(parent)->fcs; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 770 | pi->sec_level = l2cap_pi(parent)->sec_level; |
| 771 | pi->role_switch = l2cap_pi(parent)->role_switch; |
| 772 | pi->force_reliable = l2cap_pi(parent)->force_reliable; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | } else { |
| 774 | pi->imtu = L2CAP_DEFAULT_MTU; |
| 775 | pi->omtu = 0; |
Marcel Holtmann | c6b03cf | 2009-05-02 22:31:10 -0700 | [diff] [blame] | 776 | pi->mode = L2CAP_MODE_BASIC; |
| 777 | pi->fcs = L2CAP_FCS_CRC16; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 778 | pi->sec_level = BT_SECURITY_LOW; |
| 779 | pi->role_switch = 0; |
| 780 | pi->force_reliable = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | } |
| 782 | |
| 783 | /* Default config options */ |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 784 | pi->conf_len = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | pi->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
Dave Young | 45054dc | 2009-10-18 20:28:30 +0000 | [diff] [blame] | 786 | skb_queue_head_init(TX_QUEUE(sk)); |
| 787 | skb_queue_head_init(SREJ_QUEUE(sk)); |
| 788 | INIT_LIST_HEAD(SREJ_LIST(sk)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | } |
| 790 | |
| 791 | static struct proto l2cap_proto = { |
| 792 | .name = "L2CAP", |
| 793 | .owner = THIS_MODULE, |
| 794 | .obj_size = sizeof(struct l2cap_pinfo) |
| 795 | }; |
| 796 | |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 797 | 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] | 798 | { |
| 799 | struct sock *sk; |
| 800 | |
Pavel Emelyanov | 6257ff2 | 2007-11-01 00:39:31 -0700 | [diff] [blame] | 801 | sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | if (!sk) |
| 803 | return NULL; |
| 804 | |
| 805 | sock_init_data(sock, sk); |
| 806 | INIT_LIST_HEAD(&bt_sk(sk)->accept_q); |
| 807 | |
| 808 | sk->sk_destruct = l2cap_sock_destruct; |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 809 | sk->sk_sndtimeo = msecs_to_jiffies(L2CAP_CONN_TIMEOUT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | |
| 811 | sock_reset_flag(sk, SOCK_ZAPPED); |
| 812 | |
| 813 | sk->sk_protocol = proto; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 814 | sk->sk_state = BT_OPEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 816 | setup_timer(&sk->sk_timer, l2cap_sock_timeout, (unsigned long) sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | |
| 818 | bt_sock_link(&l2cap_sk_list, sk); |
| 819 | return sk; |
| 820 | } |
| 821 | |
Eric Paris | 3f378b6 | 2009-11-05 22:18:14 -0800 | [diff] [blame] | 822 | static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, |
| 823 | int kern) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | { |
| 825 | struct sock *sk; |
| 826 | |
| 827 | BT_DBG("sock %p", sock); |
| 828 | |
| 829 | sock->state = SS_UNCONNECTED; |
| 830 | |
| 831 | if (sock->type != SOCK_SEQPACKET && |
| 832 | sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) |
| 833 | return -ESOCKTNOSUPPORT; |
| 834 | |
Eric Paris | c84b326 | 2009-11-05 20:45:52 -0800 | [diff] [blame] | 835 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | return -EPERM; |
| 837 | |
| 838 | sock->ops = &l2cap_sock_ops; |
| 839 | |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 840 | sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | if (!sk) |
| 842 | return -ENOMEM; |
| 843 | |
| 844 | l2cap_sock_init(sk, NULL); |
| 845 | return 0; |
| 846 | } |
| 847 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 848 | 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] | 849 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | struct sock *sk = sock->sk; |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 851 | struct sockaddr_l2 la; |
| 852 | int len, err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 854 | BT_DBG("sk %p", sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | |
| 856 | if (!addr || addr->sa_family != AF_BLUETOOTH) |
| 857 | return -EINVAL; |
| 858 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 859 | memset(&la, 0, sizeof(la)); |
| 860 | len = min_t(unsigned int, sizeof(la), alen); |
| 861 | memcpy(&la, addr, len); |
| 862 | |
Marcel Holtmann | 2a517ca | 2009-02-16 03:20:31 +0100 | [diff] [blame] | 863 | if (la.l2_cid) |
| 864 | return -EINVAL; |
| 865 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | lock_sock(sk); |
| 867 | |
| 868 | if (sk->sk_state != BT_OPEN) { |
| 869 | err = -EBADFD; |
| 870 | goto done; |
| 871 | } |
| 872 | |
Marcel Holtmann | b4324b5 | 2009-06-07 18:06:51 +0200 | [diff] [blame] | 873 | if (la.l2_psm && __le16_to_cpu(la.l2_psm) < 0x1001 && |
Marcel Holtmann | 847641d | 2007-01-22 22:00:45 +0100 | [diff] [blame] | 874 | !capable(CAP_NET_BIND_SERVICE)) { |
| 875 | err = -EACCES; |
| 876 | goto done; |
| 877 | } |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 878 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | write_lock_bh(&l2cap_sk_list.lock); |
| 880 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 881 | 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] | 882 | err = -EADDRINUSE; |
| 883 | } else { |
| 884 | /* Save source address */ |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 885 | bacpy(&bt_sk(sk)->src, &la.l2_bdaddr); |
| 886 | l2cap_pi(sk)->psm = la.l2_psm; |
| 887 | l2cap_pi(sk)->sport = la.l2_psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | sk->sk_state = BT_BOUND; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 889 | |
Marcel Holtmann | b4324b5 | 2009-06-07 18:06:51 +0200 | [diff] [blame] | 890 | if (__le16_to_cpu(la.l2_psm) == 0x0001 || |
| 891 | __le16_to_cpu(la.l2_psm) == 0x0003) |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 892 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | } |
| 894 | |
| 895 | write_unlock_bh(&l2cap_sk_list.lock); |
| 896 | |
| 897 | done: |
| 898 | release_sock(sk); |
| 899 | return err; |
| 900 | } |
| 901 | |
| 902 | static int l2cap_do_connect(struct sock *sk) |
| 903 | { |
| 904 | bdaddr_t *src = &bt_sk(sk)->src; |
| 905 | bdaddr_t *dst = &bt_sk(sk)->dst; |
| 906 | struct l2cap_conn *conn; |
| 907 | struct hci_conn *hcon; |
| 908 | struct hci_dev *hdev; |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 909 | __u8 auth_type; |
Marcel Holtmann | 44d0e48 | 2009-04-20 07:09:16 +0200 | [diff] [blame] | 910 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 912 | BT_DBG("%s -> %s psm 0x%2.2x", batostr(src), batostr(dst), |
| 913 | l2cap_pi(sk)->psm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 915 | hdev = hci_get_route(dst, src); |
| 916 | if (!hdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | return -EHOSTUNREACH; |
| 918 | |
| 919 | hci_dev_lock_bh(hdev); |
| 920 | |
| 921 | err = -ENOMEM; |
| 922 | |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 923 | if (sk->sk_type == SOCK_RAW) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 924 | switch (l2cap_pi(sk)->sec_level) { |
| 925 | case BT_SECURITY_HIGH: |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 926 | auth_type = HCI_AT_DEDICATED_BONDING_MITM; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 927 | break; |
| 928 | case BT_SECURITY_MEDIUM: |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 929 | auth_type = HCI_AT_DEDICATED_BONDING; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 930 | break; |
| 931 | default: |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 932 | auth_type = HCI_AT_NO_BONDING; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 933 | break; |
| 934 | } |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 935 | } else if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 936 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 937 | auth_type = HCI_AT_NO_BONDING_MITM; |
| 938 | else |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 939 | auth_type = HCI_AT_NO_BONDING; |
Marcel Holtmann | 435fef2 | 2009-02-09 03:55:28 +0100 | [diff] [blame] | 940 | |
| 941 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW) |
| 942 | l2cap_pi(sk)->sec_level = BT_SECURITY_SDP; |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 943 | } else { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 944 | switch (l2cap_pi(sk)->sec_level) { |
| 945 | case BT_SECURITY_HIGH: |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 946 | auth_type = HCI_AT_GENERAL_BONDING_MITM; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 947 | break; |
| 948 | case BT_SECURITY_MEDIUM: |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 949 | auth_type = HCI_AT_GENERAL_BONDING; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 950 | break; |
| 951 | default: |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 952 | auth_type = HCI_AT_NO_BONDING; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 953 | break; |
| 954 | } |
Marcel Holtmann | 09ab6f4 | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 955 | } |
| 956 | |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 957 | hcon = hci_connect(hdev, ACL_LINK, dst, |
| 958 | l2cap_pi(sk)->sec_level, auth_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | if (!hcon) |
| 960 | goto done; |
| 961 | |
| 962 | conn = l2cap_conn_add(hcon, 0); |
| 963 | if (!conn) { |
| 964 | hci_conn_put(hcon); |
| 965 | goto done; |
| 966 | } |
| 967 | |
| 968 | err = 0; |
| 969 | |
| 970 | /* Update source addr of the socket */ |
| 971 | bacpy(src, conn->src); |
| 972 | |
| 973 | l2cap_chan_add(conn, sk, NULL); |
| 974 | |
| 975 | sk->sk_state = BT_CONNECT; |
| 976 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); |
| 977 | |
| 978 | if (hcon->state == BT_CONNECTED) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 979 | if (sk->sk_type != SOCK_SEQPACKET) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | l2cap_sock_clear_timer(sk); |
| 981 | sk->sk_state = BT_CONNECTED; |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 982 | } else |
| 983 | l2cap_do_start(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | } |
| 985 | |
| 986 | done: |
| 987 | hci_dev_unlock_bh(hdev); |
| 988 | hci_dev_put(hdev); |
| 989 | return err; |
| 990 | } |
| 991 | |
| 992 | static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) |
| 993 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | struct sock *sk = sock->sk; |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 995 | struct sockaddr_l2 la; |
| 996 | int len, err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | BT_DBG("sk %p", sk); |
| 999 | |
Marcel Holtmann | 2a517ca | 2009-02-16 03:20:31 +0100 | [diff] [blame] | 1000 | if (!addr || addr->sa_family != AF_BLUETOOTH) |
| 1001 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1003 | memset(&la, 0, sizeof(la)); |
| 1004 | len = min_t(unsigned int, sizeof(la), alen); |
| 1005 | memcpy(&la, addr, len); |
| 1006 | |
Marcel Holtmann | 2a517ca | 2009-02-16 03:20:31 +0100 | [diff] [blame] | 1007 | if (la.l2_cid) |
| 1008 | return -EINVAL; |
| 1009 | |
| 1010 | lock_sock(sk); |
| 1011 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1012 | if (sk->sk_type == SOCK_SEQPACKET && !la.l2_psm) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | err = -EINVAL; |
| 1014 | goto done; |
| 1015 | } |
| 1016 | |
Marcel Holtmann | c6b03cf | 2009-05-02 22:31:10 -0700 | [diff] [blame] | 1017 | switch (l2cap_pi(sk)->mode) { |
| 1018 | case L2CAP_MODE_BASIC: |
| 1019 | break; |
| 1020 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1021 | case L2CAP_MODE_STREAMING: |
Marcel Holtmann | c6b03cf | 2009-05-02 22:31:10 -0700 | [diff] [blame] | 1022 | if (enable_ertm) |
| 1023 | break; |
| 1024 | /* fall through */ |
| 1025 | default: |
| 1026 | err = -ENOTSUPP; |
| 1027 | goto done; |
| 1028 | } |
| 1029 | |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 1030 | switch (sk->sk_state) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | case BT_CONNECT: |
| 1032 | case BT_CONNECT2: |
| 1033 | case BT_CONFIG: |
| 1034 | /* Already connecting */ |
| 1035 | goto wait; |
| 1036 | |
| 1037 | case BT_CONNECTED: |
| 1038 | /* Already connected */ |
| 1039 | goto done; |
| 1040 | |
| 1041 | case BT_OPEN: |
| 1042 | case BT_BOUND: |
| 1043 | /* Can connect */ |
| 1044 | break; |
| 1045 | |
| 1046 | default: |
| 1047 | err = -EBADFD; |
| 1048 | goto done; |
| 1049 | } |
| 1050 | |
| 1051 | /* Set destination address and psm */ |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1052 | bacpy(&bt_sk(sk)->dst, &la.l2_bdaddr); |
| 1053 | l2cap_pi(sk)->psm = la.l2_psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 1055 | err = l2cap_do_connect(sk); |
| 1056 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | goto done; |
| 1058 | |
| 1059 | wait: |
| 1060 | err = bt_sock_wait_state(sk, BT_CONNECTED, |
| 1061 | sock_sndtimeo(sk, flags & O_NONBLOCK)); |
| 1062 | done: |
| 1063 | release_sock(sk); |
| 1064 | return err; |
| 1065 | } |
| 1066 | |
| 1067 | static int l2cap_sock_listen(struct socket *sock, int backlog) |
| 1068 | { |
| 1069 | struct sock *sk = sock->sk; |
| 1070 | int err = 0; |
| 1071 | |
| 1072 | BT_DBG("sk %p backlog %d", sk, backlog); |
| 1073 | |
| 1074 | lock_sock(sk); |
| 1075 | |
| 1076 | if (sk->sk_state != BT_BOUND || sock->type != SOCK_SEQPACKET) { |
| 1077 | err = -EBADFD; |
| 1078 | goto done; |
| 1079 | } |
| 1080 | |
Marcel Holtmann | c6b03cf | 2009-05-02 22:31:10 -0700 | [diff] [blame] | 1081 | switch (l2cap_pi(sk)->mode) { |
| 1082 | case L2CAP_MODE_BASIC: |
| 1083 | break; |
| 1084 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 1085 | case L2CAP_MODE_STREAMING: |
Marcel Holtmann | c6b03cf | 2009-05-02 22:31:10 -0700 | [diff] [blame] | 1086 | if (enable_ertm) |
| 1087 | break; |
| 1088 | /* fall through */ |
| 1089 | default: |
| 1090 | err = -ENOTSUPP; |
| 1091 | goto done; |
| 1092 | } |
| 1093 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | if (!l2cap_pi(sk)->psm) { |
| 1095 | bdaddr_t *src = &bt_sk(sk)->src; |
| 1096 | u16 psm; |
| 1097 | |
| 1098 | err = -EINVAL; |
| 1099 | |
| 1100 | write_lock_bh(&l2cap_sk_list.lock); |
| 1101 | |
| 1102 | for (psm = 0x1001; psm < 0x1100; psm += 2) |
Marcel Holtmann | b4324b5 | 2009-06-07 18:06:51 +0200 | [diff] [blame] | 1103 | if (!__l2cap_get_sock_by_addr(cpu_to_le16(psm), src)) { |
| 1104 | l2cap_pi(sk)->psm = cpu_to_le16(psm); |
| 1105 | l2cap_pi(sk)->sport = cpu_to_le16(psm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1106 | err = 0; |
| 1107 | break; |
| 1108 | } |
| 1109 | |
| 1110 | write_unlock_bh(&l2cap_sk_list.lock); |
| 1111 | |
| 1112 | if (err < 0) |
| 1113 | goto done; |
| 1114 | } |
| 1115 | |
| 1116 | sk->sk_max_ack_backlog = backlog; |
| 1117 | sk->sk_ack_backlog = 0; |
| 1118 | sk->sk_state = BT_LISTEN; |
| 1119 | |
| 1120 | done: |
| 1121 | release_sock(sk); |
| 1122 | return err; |
| 1123 | } |
| 1124 | |
| 1125 | static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) |
| 1126 | { |
| 1127 | DECLARE_WAITQUEUE(wait, current); |
| 1128 | struct sock *sk = sock->sk, *nsk; |
| 1129 | long timeo; |
| 1130 | int err = 0; |
| 1131 | |
Peter Zijlstra | fcc70d5 | 2006-11-08 22:44:35 -0800 | [diff] [blame] | 1132 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | |
| 1134 | if (sk->sk_state != BT_LISTEN) { |
| 1135 | err = -EBADFD; |
| 1136 | goto done; |
| 1137 | } |
| 1138 | |
| 1139 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
| 1140 | |
| 1141 | BT_DBG("sk %p timeo %ld", sk, timeo); |
| 1142 | |
| 1143 | /* Wait for an incoming connection. (wake-one). */ |
| 1144 | add_wait_queue_exclusive(sk->sk_sleep, &wait); |
| 1145 | while (!(nsk = bt_accept_dequeue(sk, newsock))) { |
| 1146 | set_current_state(TASK_INTERRUPTIBLE); |
| 1147 | if (!timeo) { |
| 1148 | err = -EAGAIN; |
| 1149 | break; |
| 1150 | } |
| 1151 | |
| 1152 | release_sock(sk); |
| 1153 | timeo = schedule_timeout(timeo); |
Peter Zijlstra | fcc70d5 | 2006-11-08 22:44:35 -0800 | [diff] [blame] | 1154 | lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1155 | |
| 1156 | if (sk->sk_state != BT_LISTEN) { |
| 1157 | err = -EBADFD; |
| 1158 | break; |
| 1159 | } |
| 1160 | |
| 1161 | if (signal_pending(current)) { |
| 1162 | err = sock_intr_errno(timeo); |
| 1163 | break; |
| 1164 | } |
| 1165 | } |
| 1166 | set_current_state(TASK_RUNNING); |
| 1167 | remove_wait_queue(sk->sk_sleep, &wait); |
| 1168 | |
| 1169 | if (err) |
| 1170 | goto done; |
| 1171 | |
| 1172 | newsock->state = SS_CONNECTED; |
| 1173 | |
| 1174 | BT_DBG("new socket %p", nsk); |
| 1175 | |
| 1176 | done: |
| 1177 | release_sock(sk); |
| 1178 | return err; |
| 1179 | } |
| 1180 | |
| 1181 | static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) |
| 1182 | { |
| 1183 | struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; |
| 1184 | struct sock *sk = sock->sk; |
| 1185 | |
| 1186 | BT_DBG("sock %p, sk %p", sock, sk); |
| 1187 | |
| 1188 | addr->sa_family = AF_BLUETOOTH; |
| 1189 | *len = sizeof(struct sockaddr_l2); |
| 1190 | |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1191 | if (peer) { |
| 1192 | la->l2_psm = l2cap_pi(sk)->psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); |
Marcel Holtmann | b4324b5 | 2009-06-07 18:06:51 +0200 | [diff] [blame] | 1194 | la->l2_cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1195 | } else { |
| 1196 | la->l2_psm = l2cap_pi(sk)->sport; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); |
Marcel Holtmann | b4324b5 | 2009-06-07 18:06:51 +0200 | [diff] [blame] | 1198 | la->l2_cid = cpu_to_le16(l2cap_pi(sk)->scid); |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1199 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | return 0; |
| 1202 | } |
| 1203 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1204 | static void l2cap_monitor_timeout(unsigned long arg) |
| 1205 | { |
| 1206 | struct sock *sk = (void *) arg; |
| 1207 | u16 control; |
| 1208 | |
Gustavo F. Padovan | e686219 | 2009-08-24 00:45:19 -0300 | [diff] [blame] | 1209 | bh_lock_sock(sk); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1210 | if (l2cap_pi(sk)->retry_count >= l2cap_pi(sk)->remote_max_tx) { |
| 1211 | l2cap_send_disconn_req(l2cap_pi(sk)->conn, sk); |
| 1212 | return; |
| 1213 | } |
| 1214 | |
| 1215 | l2cap_pi(sk)->retry_count++; |
| 1216 | __mod_monitor_timer(); |
| 1217 | |
| 1218 | control = L2CAP_CTRL_POLL; |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 1219 | l2cap_send_rr_or_rnr(l2cap_pi(sk), control); |
Gustavo F. Padovan | e686219 | 2009-08-24 00:45:19 -0300 | [diff] [blame] | 1220 | bh_unlock_sock(sk); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1221 | } |
| 1222 | |
| 1223 | static void l2cap_retrans_timeout(unsigned long arg) |
| 1224 | { |
| 1225 | struct sock *sk = (void *) arg; |
| 1226 | u16 control; |
| 1227 | |
Gustavo F. Padovan | e686219 | 2009-08-24 00:45:19 -0300 | [diff] [blame] | 1228 | bh_lock_sock(sk); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1229 | l2cap_pi(sk)->retry_count = 1; |
| 1230 | __mod_monitor_timer(); |
| 1231 | |
| 1232 | l2cap_pi(sk)->conn_state |= L2CAP_CONN_WAIT_F; |
| 1233 | |
| 1234 | control = L2CAP_CTRL_POLL; |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 1235 | l2cap_send_rr_or_rnr(l2cap_pi(sk), control); |
Gustavo F. Padovan | e686219 | 2009-08-24 00:45:19 -0300 | [diff] [blame] | 1236 | bh_unlock_sock(sk); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1237 | } |
| 1238 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1239 | static void l2cap_drop_acked_frames(struct sock *sk) |
| 1240 | { |
| 1241 | struct sk_buff *skb; |
| 1242 | |
| 1243 | while ((skb = skb_peek(TX_QUEUE(sk)))) { |
| 1244 | if (bt_cb(skb)->tx_seq == l2cap_pi(sk)->expected_ack_seq) |
| 1245 | break; |
| 1246 | |
| 1247 | skb = skb_dequeue(TX_QUEUE(sk)); |
| 1248 | kfree_skb(skb); |
| 1249 | |
| 1250 | l2cap_pi(sk)->unacked_frames--; |
| 1251 | } |
| 1252 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1253 | if (!l2cap_pi(sk)->unacked_frames) |
| 1254 | del_timer(&l2cap_pi(sk)->retrans_timer); |
| 1255 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1256 | return; |
| 1257 | } |
| 1258 | |
| 1259 | static inline int l2cap_do_send(struct sock *sk, struct sk_buff *skb) |
| 1260 | { |
| 1261 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 1262 | int err; |
| 1263 | |
| 1264 | BT_DBG("sk %p, skb %p len %d", sk, skb, skb->len); |
| 1265 | |
| 1266 | err = hci_send_acl(pi->conn->hcon, skb, 0); |
| 1267 | if (err < 0) |
| 1268 | kfree_skb(skb); |
| 1269 | |
| 1270 | return err; |
| 1271 | } |
| 1272 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1273 | static int l2cap_streaming_send(struct sock *sk) |
| 1274 | { |
| 1275 | struct sk_buff *skb, *tx_skb; |
| 1276 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1277 | u16 control, fcs; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1278 | int err; |
| 1279 | |
| 1280 | while ((skb = sk->sk_send_head)) { |
| 1281 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
| 1282 | |
| 1283 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); |
| 1284 | control |= pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT; |
| 1285 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); |
| 1286 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1287 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) { |
| 1288 | fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2); |
| 1289 | put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2); |
| 1290 | } |
| 1291 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1292 | err = l2cap_do_send(sk, tx_skb); |
| 1293 | if (err < 0) { |
| 1294 | l2cap_send_disconn_req(pi->conn, sk); |
| 1295 | return err; |
| 1296 | } |
| 1297 | |
| 1298 | pi->next_tx_seq = (pi->next_tx_seq + 1) % 64; |
| 1299 | |
| 1300 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) |
| 1301 | sk->sk_send_head = NULL; |
| 1302 | else |
| 1303 | sk->sk_send_head = skb_queue_next(TX_QUEUE(sk), skb); |
| 1304 | |
| 1305 | skb = skb_dequeue(TX_QUEUE(sk)); |
| 1306 | kfree_skb(skb); |
| 1307 | } |
| 1308 | return 0; |
| 1309 | } |
| 1310 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 1311 | static int l2cap_retransmit_frame(struct sock *sk, u8 tx_seq) |
| 1312 | { |
| 1313 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 1314 | struct sk_buff *skb, *tx_skb; |
| 1315 | u16 control, fcs; |
| 1316 | int err; |
| 1317 | |
| 1318 | skb = skb_peek(TX_QUEUE(sk)); |
| 1319 | do { |
| 1320 | if (bt_cb(skb)->tx_seq != tx_seq) { |
| 1321 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) |
| 1322 | break; |
| 1323 | skb = skb_queue_next(TX_QUEUE(sk), skb); |
| 1324 | continue; |
| 1325 | } |
| 1326 | |
| 1327 | if (pi->remote_max_tx && |
| 1328 | bt_cb(skb)->retries == pi->remote_max_tx) { |
| 1329 | l2cap_send_disconn_req(pi->conn, sk); |
| 1330 | break; |
| 1331 | } |
| 1332 | |
| 1333 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
| 1334 | bt_cb(skb)->retries++; |
| 1335 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); |
| 1336 | control |= (pi->req_seq << L2CAP_CTRL_REQSEQ_SHIFT) |
| 1337 | | (tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); |
| 1338 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); |
| 1339 | |
| 1340 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) { |
| 1341 | fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2); |
| 1342 | put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2); |
| 1343 | } |
| 1344 | |
| 1345 | err = l2cap_do_send(sk, tx_skb); |
| 1346 | if (err < 0) { |
| 1347 | l2cap_send_disconn_req(pi->conn, sk); |
| 1348 | return err; |
| 1349 | } |
| 1350 | break; |
| 1351 | } while(1); |
| 1352 | return 0; |
| 1353 | } |
| 1354 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1355 | static int l2cap_ertm_send(struct sock *sk) |
| 1356 | { |
| 1357 | struct sk_buff *skb, *tx_skb; |
| 1358 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1359 | u16 control, fcs; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1360 | int err; |
| 1361 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1362 | if (pi->conn_state & L2CAP_CONN_WAIT_F) |
| 1363 | return 0; |
| 1364 | |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame^] | 1365 | while ((skb = sk->sk_send_head) && (!l2cap_tx_window_full(sk)) && |
| 1366 | !(pi->conn_state & L2CAP_CONN_REMOTE_BUSY)) { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1367 | tx_skb = skb_clone(skb, GFP_ATOMIC); |
| 1368 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1369 | if (pi->remote_max_tx && |
| 1370 | bt_cb(skb)->retries == pi->remote_max_tx) { |
| 1371 | l2cap_send_disconn_req(pi->conn, sk); |
| 1372 | break; |
| 1373 | } |
| 1374 | |
| 1375 | bt_cb(skb)->retries++; |
| 1376 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1377 | control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE); |
| 1378 | control |= (pi->req_seq << L2CAP_CTRL_REQSEQ_SHIFT) |
| 1379 | | (pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT); |
| 1380 | put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE); |
| 1381 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1382 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1383 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) { |
| 1384 | fcs = crc16(0, (u8 *)skb->data, tx_skb->len - 2); |
| 1385 | put_unaligned_le16(fcs, skb->data + tx_skb->len - 2); |
| 1386 | } |
| 1387 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1388 | err = l2cap_do_send(sk, tx_skb); |
| 1389 | if (err < 0) { |
| 1390 | l2cap_send_disconn_req(pi->conn, sk); |
| 1391 | return err; |
| 1392 | } |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1393 | __mod_retrans_timer(); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1394 | |
| 1395 | bt_cb(skb)->tx_seq = pi->next_tx_seq; |
| 1396 | pi->next_tx_seq = (pi->next_tx_seq + 1) % 64; |
| 1397 | |
| 1398 | pi->unacked_frames++; |
| 1399 | |
| 1400 | if (skb_queue_is_last(TX_QUEUE(sk), skb)) |
| 1401 | sk->sk_send_head = NULL; |
| 1402 | else |
| 1403 | sk->sk_send_head = skb_queue_next(TX_QUEUE(sk), skb); |
| 1404 | } |
| 1405 | |
| 1406 | return 0; |
| 1407 | } |
| 1408 | |
| 1409 | static inline int l2cap_skbuff_fromiovec(struct sock *sk, struct msghdr *msg, int len, int count, struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1410 | { |
| 1411 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1412 | struct sk_buff **frag; |
| 1413 | int err, sent = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1414 | |
| 1415 | if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count)) { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1416 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1417 | } |
| 1418 | |
| 1419 | sent += count; |
| 1420 | len -= count; |
| 1421 | |
| 1422 | /* Continuation fragments (no L2CAP header) */ |
| 1423 | frag = &skb_shinfo(skb)->frag_list; |
| 1424 | while (len) { |
| 1425 | count = min_t(unsigned int, conn->mtu, len); |
| 1426 | |
| 1427 | *frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err); |
| 1428 | if (!*frag) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1429 | return -EFAULT; |
| 1430 | if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count)) |
| 1431 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1432 | |
| 1433 | sent += count; |
| 1434 | len -= count; |
| 1435 | |
| 1436 | frag = &(*frag)->next; |
| 1437 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1438 | |
| 1439 | return sent; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1440 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1442 | static struct sk_buff *l2cap_create_connless_pdu(struct sock *sk, struct msghdr *msg, size_t len) |
| 1443 | { |
| 1444 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 1445 | struct sk_buff *skb; |
| 1446 | int err, count, hlen = L2CAP_HDR_SIZE + 2; |
| 1447 | struct l2cap_hdr *lh; |
| 1448 | |
| 1449 | BT_DBG("sk %p len %d", sk, (int)len); |
| 1450 | |
| 1451 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
| 1452 | skb = bt_skb_send_alloc(sk, count + hlen, |
| 1453 | msg->msg_flags & MSG_DONTWAIT, &err); |
| 1454 | if (!skb) |
| 1455 | return ERR_PTR(-ENOMEM); |
| 1456 | |
| 1457 | /* Create L2CAP header */ |
| 1458 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
| 1459 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 1460 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); |
| 1461 | put_unaligned_le16(l2cap_pi(sk)->psm, skb_put(skb, 2)); |
| 1462 | |
| 1463 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); |
| 1464 | if (unlikely(err < 0)) { |
| 1465 | kfree_skb(skb); |
| 1466 | return ERR_PTR(err); |
| 1467 | } |
| 1468 | return skb; |
| 1469 | } |
| 1470 | |
| 1471 | static struct sk_buff *l2cap_create_basic_pdu(struct sock *sk, struct msghdr *msg, size_t len) |
| 1472 | { |
| 1473 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 1474 | struct sk_buff *skb; |
| 1475 | int err, count, hlen = L2CAP_HDR_SIZE; |
| 1476 | struct l2cap_hdr *lh; |
| 1477 | |
| 1478 | BT_DBG("sk %p len %d", sk, (int)len); |
| 1479 | |
| 1480 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
| 1481 | skb = bt_skb_send_alloc(sk, count + hlen, |
| 1482 | msg->msg_flags & MSG_DONTWAIT, &err); |
| 1483 | if (!skb) |
| 1484 | return ERR_PTR(-ENOMEM); |
| 1485 | |
| 1486 | /* Create L2CAP header */ |
| 1487 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
| 1488 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 1489 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); |
| 1490 | |
| 1491 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); |
| 1492 | if (unlikely(err < 0)) { |
| 1493 | kfree_skb(skb); |
| 1494 | return ERR_PTR(err); |
| 1495 | } |
| 1496 | return skb; |
| 1497 | } |
| 1498 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1499 | static struct sk_buff *l2cap_create_iframe_pdu(struct sock *sk, struct msghdr *msg, size_t len, u16 control, u16 sdulen) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1500 | { |
| 1501 | struct l2cap_conn *conn = l2cap_pi(sk)->conn; |
| 1502 | struct sk_buff *skb; |
| 1503 | int err, count, hlen = L2CAP_HDR_SIZE + 2; |
| 1504 | struct l2cap_hdr *lh; |
| 1505 | |
| 1506 | BT_DBG("sk %p len %d", sk, (int)len); |
| 1507 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1508 | if (sdulen) |
| 1509 | hlen += 2; |
| 1510 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1511 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) |
| 1512 | hlen += 2; |
| 1513 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1514 | count = min_t(unsigned int, (conn->mtu - hlen), len); |
| 1515 | skb = bt_skb_send_alloc(sk, count + hlen, |
| 1516 | msg->msg_flags & MSG_DONTWAIT, &err); |
| 1517 | if (!skb) |
| 1518 | return ERR_PTR(-ENOMEM); |
| 1519 | |
| 1520 | /* Create L2CAP header */ |
| 1521 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
| 1522 | lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 1523 | lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE)); |
| 1524 | put_unaligned_le16(control, skb_put(skb, 2)); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1525 | if (sdulen) |
| 1526 | put_unaligned_le16(sdulen, skb_put(skb, 2)); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1527 | |
| 1528 | err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb); |
| 1529 | if (unlikely(err < 0)) { |
| 1530 | kfree_skb(skb); |
| 1531 | return ERR_PTR(err); |
| 1532 | } |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1533 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1534 | if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16) |
| 1535 | put_unaligned_le16(0, skb_put(skb, 2)); |
| 1536 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 1537 | bt_cb(skb)->retries = 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1538 | return skb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1539 | } |
| 1540 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1541 | static inline int l2cap_sar_segment_sdu(struct sock *sk, struct msghdr *msg, size_t len) |
| 1542 | { |
| 1543 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 1544 | struct sk_buff *skb; |
| 1545 | struct sk_buff_head sar_queue; |
| 1546 | u16 control; |
| 1547 | size_t size = 0; |
| 1548 | |
| 1549 | __skb_queue_head_init(&sar_queue); |
| 1550 | control = L2CAP_SDU_START; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1551 | skb = l2cap_create_iframe_pdu(sk, msg, pi->max_pdu_size, control, len); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1552 | if (IS_ERR(skb)) |
| 1553 | return PTR_ERR(skb); |
| 1554 | |
| 1555 | __skb_queue_tail(&sar_queue, skb); |
| 1556 | len -= pi->max_pdu_size; |
| 1557 | size +=pi->max_pdu_size; |
| 1558 | control = 0; |
| 1559 | |
| 1560 | while (len > 0) { |
| 1561 | size_t buflen; |
| 1562 | |
| 1563 | if (len > pi->max_pdu_size) { |
| 1564 | control |= L2CAP_SDU_CONTINUE; |
| 1565 | buflen = pi->max_pdu_size; |
| 1566 | } else { |
| 1567 | control |= L2CAP_SDU_END; |
| 1568 | buflen = len; |
| 1569 | } |
| 1570 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1571 | skb = l2cap_create_iframe_pdu(sk, msg, buflen, control, 0); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1572 | if (IS_ERR(skb)) { |
| 1573 | skb_queue_purge(&sar_queue); |
| 1574 | return PTR_ERR(skb); |
| 1575 | } |
| 1576 | |
| 1577 | __skb_queue_tail(&sar_queue, skb); |
| 1578 | len -= buflen; |
| 1579 | size += buflen; |
| 1580 | control = 0; |
| 1581 | } |
| 1582 | skb_queue_splice_tail(&sar_queue, TX_QUEUE(sk)); |
| 1583 | if (sk->sk_send_head == NULL) |
| 1584 | sk->sk_send_head = sar_queue.next; |
| 1585 | |
| 1586 | return size; |
| 1587 | } |
| 1588 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) |
| 1590 | { |
| 1591 | struct sock *sk = sock->sk; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1592 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 1593 | struct sk_buff *skb; |
| 1594 | u16 control; |
| 1595 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1596 | |
| 1597 | BT_DBG("sock %p, sk %p", sock, sk); |
| 1598 | |
Benjamin LaHaise | c1cbe4b | 2005-12-13 23:22:19 -0800 | [diff] [blame] | 1599 | err = sock_error(sk); |
| 1600 | if (err) |
| 1601 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1602 | |
| 1603 | if (msg->msg_flags & MSG_OOB) |
| 1604 | return -EOPNOTSUPP; |
| 1605 | |
| 1606 | /* Check outgoing MTU */ |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame^] | 1607 | if (sk->sk_type == SOCK_SEQPACKET && pi->mode == L2CAP_MODE_BASIC && |
| 1608 | len > pi->omtu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1609 | return -EINVAL; |
| 1610 | |
| 1611 | lock_sock(sk); |
| 1612 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1613 | if (sk->sk_state != BT_CONNECTED) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1614 | err = -ENOTCONN; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1615 | goto done; |
| 1616 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1617 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1618 | /* Connectionless channel */ |
| 1619 | if (sk->sk_type == SOCK_DGRAM) { |
| 1620 | skb = l2cap_create_connless_pdu(sk, msg, len); |
| 1621 | err = l2cap_do_send(sk, skb); |
| 1622 | goto done; |
| 1623 | } |
| 1624 | |
| 1625 | switch (pi->mode) { |
| 1626 | case L2CAP_MODE_BASIC: |
| 1627 | /* Create a basic PDU */ |
| 1628 | skb = l2cap_create_basic_pdu(sk, msg, len); |
| 1629 | if (IS_ERR(skb)) { |
| 1630 | err = PTR_ERR(skb); |
| 1631 | goto done; |
| 1632 | } |
| 1633 | |
| 1634 | err = l2cap_do_send(sk, skb); |
| 1635 | if (!err) |
| 1636 | err = len; |
| 1637 | break; |
| 1638 | |
| 1639 | case L2CAP_MODE_ERTM: |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1640 | case L2CAP_MODE_STREAMING: |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1641 | /* Entire SDU fits into one PDU */ |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1642 | if (len <= pi->max_pdu_size) { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1643 | control = L2CAP_SDU_UNSEGMENTED; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1644 | skb = l2cap_create_iframe_pdu(sk, msg, len, control, 0); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1645 | if (IS_ERR(skb)) { |
| 1646 | err = PTR_ERR(skb); |
| 1647 | goto done; |
| 1648 | } |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1649 | __skb_queue_tail(TX_QUEUE(sk), skb); |
| 1650 | if (sk->sk_send_head == NULL) |
| 1651 | sk->sk_send_head = skb; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1652 | } else { |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 1653 | /* Segment SDU into multiples PDUs */ |
| 1654 | err = l2cap_sar_segment_sdu(sk, msg, len); |
| 1655 | if (err < 0) |
| 1656 | goto done; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1657 | } |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1658 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 1659 | if (pi->mode == L2CAP_MODE_STREAMING) |
| 1660 | err = l2cap_streaming_send(sk); |
| 1661 | else |
| 1662 | err = l2cap_ertm_send(sk); |
| 1663 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 1664 | if (!err) |
| 1665 | err = len; |
| 1666 | break; |
| 1667 | |
| 1668 | default: |
| 1669 | BT_DBG("bad state %1.1x", pi->mode); |
| 1670 | err = -EINVAL; |
| 1671 | } |
| 1672 | |
| 1673 | done: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1674 | release_sock(sk); |
| 1675 | return err; |
| 1676 | } |
| 1677 | |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 1678 | static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) |
| 1679 | { |
| 1680 | struct sock *sk = sock->sk; |
| 1681 | |
| 1682 | lock_sock(sk); |
| 1683 | |
| 1684 | if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) { |
| 1685 | struct l2cap_conn_rsp rsp; |
| 1686 | |
| 1687 | sk->sk_state = BT_CONFIG; |
| 1688 | |
| 1689 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 1690 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 1691 | rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS); |
| 1692 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
| 1693 | l2cap_send_cmd(l2cap_pi(sk)->conn, l2cap_pi(sk)->ident, |
| 1694 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
| 1695 | |
| 1696 | release_sock(sk); |
| 1697 | return 0; |
| 1698 | } |
| 1699 | |
| 1700 | release_sock(sk); |
| 1701 | |
| 1702 | return bt_sock_recvmsg(iocb, sock, msg, len, flags); |
| 1703 | } |
| 1704 | |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 1705 | static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1706 | { |
| 1707 | struct sock *sk = sock->sk; |
| 1708 | struct l2cap_options opts; |
Marcel Holtmann | f29972d | 2009-02-12 05:07:45 +0100 | [diff] [blame] | 1709 | int len, err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1710 | u32 opt; |
| 1711 | |
| 1712 | BT_DBG("sk %p", sk); |
| 1713 | |
| 1714 | lock_sock(sk); |
| 1715 | |
| 1716 | switch (optname) { |
| 1717 | case L2CAP_OPTIONS: |
Marcel Holtmann | 0878b66 | 2007-05-05 00:35:59 +0200 | [diff] [blame] | 1718 | opts.imtu = l2cap_pi(sk)->imtu; |
| 1719 | opts.omtu = l2cap_pi(sk)->omtu; |
| 1720 | opts.flush_to = l2cap_pi(sk)->flush_to; |
Marcel Holtmann | c6b03cf | 2009-05-02 22:31:10 -0700 | [diff] [blame] | 1721 | opts.mode = l2cap_pi(sk)->mode; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1722 | opts.fcs = l2cap_pi(sk)->fcs; |
Marcel Holtmann | 0878b66 | 2007-05-05 00:35:59 +0200 | [diff] [blame] | 1723 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1724 | len = min_t(unsigned int, sizeof(opts), optlen); |
| 1725 | if (copy_from_user((char *) &opts, optval, len)) { |
| 1726 | err = -EFAULT; |
| 1727 | break; |
| 1728 | } |
Marcel Holtmann | 0878b66 | 2007-05-05 00:35:59 +0200 | [diff] [blame] | 1729 | |
Marcel Holtmann | c6b03cf | 2009-05-02 22:31:10 -0700 | [diff] [blame] | 1730 | l2cap_pi(sk)->imtu = opts.imtu; |
| 1731 | l2cap_pi(sk)->omtu = opts.omtu; |
| 1732 | l2cap_pi(sk)->mode = opts.mode; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1733 | l2cap_pi(sk)->fcs = opts.fcs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1734 | break; |
| 1735 | |
| 1736 | case L2CAP_LM: |
| 1737 | if (get_user(opt, (u32 __user *) optval)) { |
| 1738 | err = -EFAULT; |
| 1739 | break; |
| 1740 | } |
| 1741 | |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1742 | if (opt & L2CAP_LM_AUTH) |
| 1743 | l2cap_pi(sk)->sec_level = BT_SECURITY_LOW; |
| 1744 | if (opt & L2CAP_LM_ENCRYPT) |
| 1745 | l2cap_pi(sk)->sec_level = BT_SECURITY_MEDIUM; |
| 1746 | if (opt & L2CAP_LM_SECURE) |
| 1747 | l2cap_pi(sk)->sec_level = BT_SECURITY_HIGH; |
| 1748 | |
| 1749 | l2cap_pi(sk)->role_switch = (opt & L2CAP_LM_MASTER); |
| 1750 | l2cap_pi(sk)->force_reliable = (opt & L2CAP_LM_RELIABLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1751 | break; |
| 1752 | |
| 1753 | default: |
| 1754 | err = -ENOPROTOOPT; |
| 1755 | break; |
| 1756 | } |
| 1757 | |
| 1758 | release_sock(sk); |
| 1759 | return err; |
| 1760 | } |
| 1761 | |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 1762 | static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 1763 | { |
| 1764 | struct sock *sk = sock->sk; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1765 | struct bt_security sec; |
| 1766 | int len, err = 0; |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 1767 | u32 opt; |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 1768 | |
| 1769 | BT_DBG("sk %p", sk); |
| 1770 | |
| 1771 | if (level == SOL_L2CAP) |
| 1772 | return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); |
| 1773 | |
Marcel Holtmann | 0588d94 | 2009-01-16 10:06:13 +0100 | [diff] [blame] | 1774 | if (level != SOL_BLUETOOTH) |
| 1775 | return -ENOPROTOOPT; |
| 1776 | |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 1777 | lock_sock(sk); |
| 1778 | |
| 1779 | switch (optname) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1780 | case BT_SECURITY: |
Marcel Holtmann | 2526d3d | 2009-02-20 20:54:06 +0100 | [diff] [blame] | 1781 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_RAW) { |
Marcel Holtmann | 0588d94 | 2009-01-16 10:06:13 +0100 | [diff] [blame] | 1782 | err = -EINVAL; |
| 1783 | break; |
| 1784 | } |
| 1785 | |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1786 | sec.level = BT_SECURITY_LOW; |
| 1787 | |
| 1788 | len = min_t(unsigned int, sizeof(sec), optlen); |
| 1789 | if (copy_from_user((char *) &sec, optval, len)) { |
| 1790 | err = -EFAULT; |
| 1791 | break; |
| 1792 | } |
| 1793 | |
| 1794 | if (sec.level < BT_SECURITY_LOW || |
| 1795 | sec.level > BT_SECURITY_HIGH) { |
| 1796 | err = -EINVAL; |
| 1797 | break; |
| 1798 | } |
| 1799 | |
| 1800 | l2cap_pi(sk)->sec_level = sec.level; |
| 1801 | break; |
| 1802 | |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 1803 | case BT_DEFER_SETUP: |
| 1804 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { |
| 1805 | err = -EINVAL; |
| 1806 | break; |
| 1807 | } |
| 1808 | |
| 1809 | if (get_user(opt, (u32 __user *) optval)) { |
| 1810 | err = -EFAULT; |
| 1811 | break; |
| 1812 | } |
| 1813 | |
| 1814 | bt_sk(sk)->defer_setup = opt; |
| 1815 | break; |
| 1816 | |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 1817 | default: |
| 1818 | err = -ENOPROTOOPT; |
| 1819 | break; |
| 1820 | } |
| 1821 | |
| 1822 | release_sock(sk); |
| 1823 | return err; |
| 1824 | } |
| 1825 | |
| 1826 | 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] | 1827 | { |
| 1828 | struct sock *sk = sock->sk; |
| 1829 | struct l2cap_options opts; |
| 1830 | struct l2cap_conninfo cinfo; |
| 1831 | int len, err = 0; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1832 | u32 opt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1833 | |
| 1834 | BT_DBG("sk %p", sk); |
| 1835 | |
| 1836 | if (get_user(len, optlen)) |
| 1837 | return -EFAULT; |
| 1838 | |
| 1839 | lock_sock(sk); |
| 1840 | |
| 1841 | switch (optname) { |
| 1842 | case L2CAP_OPTIONS: |
| 1843 | opts.imtu = l2cap_pi(sk)->imtu; |
| 1844 | opts.omtu = l2cap_pi(sk)->omtu; |
| 1845 | opts.flush_to = l2cap_pi(sk)->flush_to; |
Marcel Holtmann | c6b03cf | 2009-05-02 22:31:10 -0700 | [diff] [blame] | 1846 | opts.mode = l2cap_pi(sk)->mode; |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 1847 | opts.fcs = l2cap_pi(sk)->fcs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1848 | |
| 1849 | len = min_t(unsigned int, len, sizeof(opts)); |
| 1850 | if (copy_to_user(optval, (char *) &opts, len)) |
| 1851 | err = -EFAULT; |
| 1852 | |
| 1853 | break; |
| 1854 | |
| 1855 | case L2CAP_LM: |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1856 | switch (l2cap_pi(sk)->sec_level) { |
| 1857 | case BT_SECURITY_LOW: |
| 1858 | opt = L2CAP_LM_AUTH; |
| 1859 | break; |
| 1860 | case BT_SECURITY_MEDIUM: |
| 1861 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; |
| 1862 | break; |
| 1863 | case BT_SECURITY_HIGH: |
| 1864 | opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | |
| 1865 | L2CAP_LM_SECURE; |
| 1866 | break; |
| 1867 | default: |
| 1868 | opt = 0; |
| 1869 | break; |
| 1870 | } |
| 1871 | |
| 1872 | if (l2cap_pi(sk)->role_switch) |
| 1873 | opt |= L2CAP_LM_MASTER; |
| 1874 | |
| 1875 | if (l2cap_pi(sk)->force_reliable) |
| 1876 | opt |= L2CAP_LM_RELIABLE; |
| 1877 | |
| 1878 | if (put_user(opt, (u32 __user *) optval)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1879 | err = -EFAULT; |
| 1880 | break; |
| 1881 | |
| 1882 | case L2CAP_CONNINFO: |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 1883 | if (sk->sk_state != BT_CONNECTED && |
| 1884 | !(sk->sk_state == BT_CONNECT2 && |
| 1885 | bt_sk(sk)->defer_setup)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1886 | err = -ENOTCONN; |
| 1887 | break; |
| 1888 | } |
| 1889 | |
| 1890 | cinfo.hci_handle = l2cap_pi(sk)->conn->hcon->handle; |
| 1891 | memcpy(cinfo.dev_class, l2cap_pi(sk)->conn->hcon->dev_class, 3); |
| 1892 | |
| 1893 | len = min_t(unsigned int, len, sizeof(cinfo)); |
| 1894 | if (copy_to_user(optval, (char *) &cinfo, len)) |
| 1895 | err = -EFAULT; |
| 1896 | |
| 1897 | break; |
| 1898 | |
| 1899 | default: |
| 1900 | err = -ENOPROTOOPT; |
| 1901 | break; |
| 1902 | } |
| 1903 | |
| 1904 | release_sock(sk); |
| 1905 | return err; |
| 1906 | } |
| 1907 | |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 1908 | static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) |
| 1909 | { |
| 1910 | struct sock *sk = sock->sk; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1911 | struct bt_security sec; |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 1912 | int len, err = 0; |
| 1913 | |
| 1914 | BT_DBG("sk %p", sk); |
| 1915 | |
| 1916 | if (level == SOL_L2CAP) |
| 1917 | return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); |
| 1918 | |
Marcel Holtmann | 0588d94 | 2009-01-16 10:06:13 +0100 | [diff] [blame] | 1919 | if (level != SOL_BLUETOOTH) |
| 1920 | return -ENOPROTOOPT; |
| 1921 | |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 1922 | if (get_user(len, optlen)) |
| 1923 | return -EFAULT; |
| 1924 | |
| 1925 | lock_sock(sk); |
| 1926 | |
| 1927 | switch (optname) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1928 | case BT_SECURITY: |
Marcel Holtmann | 2526d3d | 2009-02-20 20:54:06 +0100 | [diff] [blame] | 1929 | if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_RAW) { |
Marcel Holtmann | 0588d94 | 2009-01-16 10:06:13 +0100 | [diff] [blame] | 1930 | err = -EINVAL; |
| 1931 | break; |
| 1932 | } |
| 1933 | |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 1934 | sec.level = l2cap_pi(sk)->sec_level; |
| 1935 | |
| 1936 | len = min_t(unsigned int, len, sizeof(sec)); |
| 1937 | if (copy_to_user(optval, (char *) &sec, len)) |
| 1938 | err = -EFAULT; |
| 1939 | |
| 1940 | break; |
| 1941 | |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 1942 | case BT_DEFER_SETUP: |
| 1943 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { |
| 1944 | err = -EINVAL; |
| 1945 | break; |
| 1946 | } |
| 1947 | |
| 1948 | if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval)) |
| 1949 | err = -EFAULT; |
| 1950 | |
| 1951 | break; |
| 1952 | |
Marcel Holtmann | d58daf4 | 2009-01-15 21:52:14 +0100 | [diff] [blame] | 1953 | default: |
| 1954 | err = -ENOPROTOOPT; |
| 1955 | break; |
| 1956 | } |
| 1957 | |
| 1958 | release_sock(sk); |
| 1959 | return err; |
| 1960 | } |
| 1961 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1962 | static int l2cap_sock_shutdown(struct socket *sock, int how) |
| 1963 | { |
| 1964 | struct sock *sk = sock->sk; |
| 1965 | int err = 0; |
| 1966 | |
| 1967 | BT_DBG("sock %p, sk %p", sock, sk); |
| 1968 | |
| 1969 | if (!sk) |
| 1970 | return 0; |
| 1971 | |
| 1972 | lock_sock(sk); |
| 1973 | if (!sk->sk_shutdown) { |
| 1974 | sk->sk_shutdown = SHUTDOWN_MASK; |
| 1975 | l2cap_sock_clear_timer(sk); |
| 1976 | __l2cap_sock_close(sk, 0); |
| 1977 | |
| 1978 | if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 1979 | err = bt_sock_wait_state(sk, BT_CLOSED, |
| 1980 | sk->sk_lingertime); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1981 | } |
| 1982 | release_sock(sk); |
| 1983 | return err; |
| 1984 | } |
| 1985 | |
| 1986 | static int l2cap_sock_release(struct socket *sock) |
| 1987 | { |
| 1988 | struct sock *sk = sock->sk; |
| 1989 | int err; |
| 1990 | |
| 1991 | BT_DBG("sock %p, sk %p", sock, sk); |
| 1992 | |
| 1993 | if (!sk) |
| 1994 | return 0; |
| 1995 | |
| 1996 | err = l2cap_sock_shutdown(sock, 2); |
| 1997 | |
| 1998 | sock_orphan(sk); |
| 1999 | l2cap_sock_kill(sk); |
| 2000 | return err; |
| 2001 | } |
| 2002 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2003 | static void l2cap_chan_ready(struct sock *sk) |
| 2004 | { |
| 2005 | struct sock *parent = bt_sk(sk)->parent; |
| 2006 | |
| 2007 | BT_DBG("sk %p, parent %p", sk, parent); |
| 2008 | |
| 2009 | l2cap_pi(sk)->conf_state = 0; |
| 2010 | l2cap_sock_clear_timer(sk); |
| 2011 | |
| 2012 | if (!parent) { |
| 2013 | /* Outgoing channel. |
| 2014 | * Wake up socket sleeping on connect. |
| 2015 | */ |
| 2016 | sk->sk_state = BT_CONNECTED; |
| 2017 | sk->sk_state_change(sk); |
| 2018 | } else { |
| 2019 | /* Incoming channel. |
| 2020 | * Wake up socket sleeping on accept. |
| 2021 | */ |
| 2022 | parent->sk_data_ready(parent, 0); |
| 2023 | } |
| 2024 | } |
| 2025 | |
| 2026 | /* Copy frame to all raw sockets on that connection */ |
| 2027 | static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb) |
| 2028 | { |
| 2029 | struct l2cap_chan_list *l = &conn->chan_list; |
| 2030 | struct sk_buff *nskb; |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2031 | struct sock *sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2032 | |
| 2033 | BT_DBG("conn %p", conn); |
| 2034 | |
| 2035 | read_lock(&l->lock); |
| 2036 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
| 2037 | if (sk->sk_type != SOCK_RAW) |
| 2038 | continue; |
| 2039 | |
| 2040 | /* Don't send frame to the socket it came from */ |
| 2041 | if (skb->sk == sk) |
| 2042 | continue; |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2043 | nskb = skb_clone(skb, GFP_ATOMIC); |
| 2044 | if (!nskb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2045 | continue; |
| 2046 | |
| 2047 | if (sock_queue_rcv_skb(sk, nskb)) |
| 2048 | kfree_skb(nskb); |
| 2049 | } |
| 2050 | read_unlock(&l->lock); |
| 2051 | } |
| 2052 | |
| 2053 | /* ---- L2CAP signalling commands ---- */ |
| 2054 | static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn, |
| 2055 | u8 code, u8 ident, u16 dlen, void *data) |
| 2056 | { |
| 2057 | struct sk_buff *skb, **frag; |
| 2058 | struct l2cap_cmd_hdr *cmd; |
| 2059 | struct l2cap_hdr *lh; |
| 2060 | int len, count; |
| 2061 | |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2062 | BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d", |
| 2063 | conn, code, ident, dlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2064 | |
| 2065 | len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen; |
| 2066 | count = min_t(unsigned int, conn->mtu, len); |
| 2067 | |
| 2068 | skb = bt_skb_alloc(count, GFP_ATOMIC); |
| 2069 | if (!skb) |
| 2070 | return NULL; |
| 2071 | |
| 2072 | lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2073 | lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen); |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 2074 | lh->cid = cpu_to_le16(L2CAP_CID_SIGNALING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2075 | |
| 2076 | cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE); |
| 2077 | cmd->code = code; |
| 2078 | cmd->ident = ident; |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2079 | cmd->len = cpu_to_le16(dlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2080 | |
| 2081 | if (dlen) { |
| 2082 | count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE; |
| 2083 | memcpy(skb_put(skb, count), data, count); |
| 2084 | data += count; |
| 2085 | } |
| 2086 | |
| 2087 | len -= skb->len; |
| 2088 | |
| 2089 | /* Continuation fragments (no L2CAP header) */ |
| 2090 | frag = &skb_shinfo(skb)->frag_list; |
| 2091 | while (len) { |
| 2092 | count = min_t(unsigned int, conn->mtu, len); |
| 2093 | |
| 2094 | *frag = bt_skb_alloc(count, GFP_ATOMIC); |
| 2095 | if (!*frag) |
| 2096 | goto fail; |
| 2097 | |
| 2098 | memcpy(skb_put(*frag, count), data, count); |
| 2099 | |
| 2100 | len -= count; |
| 2101 | data += count; |
| 2102 | |
| 2103 | frag = &(*frag)->next; |
| 2104 | } |
| 2105 | |
| 2106 | return skb; |
| 2107 | |
| 2108 | fail: |
| 2109 | kfree_skb(skb); |
| 2110 | return NULL; |
| 2111 | } |
| 2112 | |
| 2113 | static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val) |
| 2114 | { |
| 2115 | struct l2cap_conf_opt *opt = *ptr; |
| 2116 | int len; |
| 2117 | |
| 2118 | len = L2CAP_CONF_OPT_SIZE + opt->len; |
| 2119 | *ptr += len; |
| 2120 | |
| 2121 | *type = opt->type; |
| 2122 | *olen = opt->len; |
| 2123 | |
| 2124 | switch (opt->len) { |
| 2125 | case 1: |
| 2126 | *val = *((u8 *) opt->val); |
| 2127 | break; |
| 2128 | |
| 2129 | case 2: |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 2130 | *val = __le16_to_cpu(*((__le16 *) opt->val)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2131 | break; |
| 2132 | |
| 2133 | case 4: |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 2134 | *val = __le32_to_cpu(*((__le32 *) opt->val)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2135 | break; |
| 2136 | |
| 2137 | default: |
| 2138 | *val = (unsigned long) opt->val; |
| 2139 | break; |
| 2140 | } |
| 2141 | |
| 2142 | BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val); |
| 2143 | return len; |
| 2144 | } |
| 2145 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2146 | static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val) |
| 2147 | { |
| 2148 | struct l2cap_conf_opt *opt = *ptr; |
| 2149 | |
| 2150 | BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val); |
| 2151 | |
| 2152 | opt->type = type; |
| 2153 | opt->len = len; |
| 2154 | |
| 2155 | switch (len) { |
| 2156 | case 1: |
| 2157 | *((u8 *) opt->val) = val; |
| 2158 | break; |
| 2159 | |
| 2160 | case 2: |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 2161 | *((__le16 *) opt->val) = cpu_to_le16(val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2162 | break; |
| 2163 | |
| 2164 | case 4: |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 2165 | *((__le32 *) opt->val) = cpu_to_le32(val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2166 | break; |
| 2167 | |
| 2168 | default: |
| 2169 | memcpy(opt->val, (void *) val, len); |
| 2170 | break; |
| 2171 | } |
| 2172 | |
| 2173 | *ptr += L2CAP_CONF_OPT_SIZE + len; |
| 2174 | } |
| 2175 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2176 | static int l2cap_mode_supported(__u8 mode, __u32 feat_mask) |
| 2177 | { |
| 2178 | u32 local_feat_mask = l2cap_feat_mask; |
| 2179 | if (enable_ertm) |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 2180 | local_feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2181 | |
| 2182 | switch (mode) { |
| 2183 | case L2CAP_MODE_ERTM: |
| 2184 | return L2CAP_FEAT_ERTM & feat_mask & local_feat_mask; |
| 2185 | case L2CAP_MODE_STREAMING: |
| 2186 | return L2CAP_FEAT_STREAMING & feat_mask & local_feat_mask; |
| 2187 | default: |
| 2188 | return 0x00; |
| 2189 | } |
| 2190 | } |
| 2191 | |
| 2192 | static inline __u8 l2cap_select_mode(__u8 mode, __u16 remote_feat_mask) |
| 2193 | { |
| 2194 | switch (mode) { |
| 2195 | case L2CAP_MODE_STREAMING: |
| 2196 | case L2CAP_MODE_ERTM: |
| 2197 | if (l2cap_mode_supported(mode, remote_feat_mask)) |
| 2198 | return mode; |
| 2199 | /* fall through */ |
| 2200 | default: |
| 2201 | return L2CAP_MODE_BASIC; |
| 2202 | } |
| 2203 | } |
| 2204 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2205 | static int l2cap_build_conf_req(struct sock *sk, void *data) |
| 2206 | { |
| 2207 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 2208 | struct l2cap_conf_req *req = data; |
Gustavo F. Padovan | a0e55a3 | 2009-09-29 01:42:23 -0300 | [diff] [blame] | 2209 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2210 | void *ptr = req->data; |
| 2211 | |
| 2212 | BT_DBG("sk %p", sk); |
| 2213 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2214 | if (pi->num_conf_req || pi->num_conf_rsp) |
| 2215 | goto done; |
| 2216 | |
| 2217 | switch (pi->mode) { |
| 2218 | case L2CAP_MODE_STREAMING: |
| 2219 | case L2CAP_MODE_ERTM: |
| 2220 | pi->conf_state |= L2CAP_CONF_STATE2_DEVICE; |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 2221 | if (!l2cap_mode_supported(pi->mode, pi->conn->feat_mask)) |
| 2222 | l2cap_send_disconn_req(pi->conn, sk); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2223 | break; |
| 2224 | default: |
| 2225 | pi->mode = l2cap_select_mode(rfc.mode, pi->conn->feat_mask); |
| 2226 | break; |
| 2227 | } |
| 2228 | |
| 2229 | done: |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 2230 | switch (pi->mode) { |
| 2231 | case L2CAP_MODE_BASIC: |
| 2232 | if (pi->imtu != L2CAP_DEFAULT_MTU) |
| 2233 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu); |
| 2234 | break; |
| 2235 | |
| 2236 | case L2CAP_MODE_ERTM: |
| 2237 | rfc.mode = L2CAP_MODE_ERTM; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2238 | rfc.txwin_size = L2CAP_DEFAULT_TX_WINDOW; |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 2239 | rfc.max_transmit = L2CAP_DEFAULT_MAX_TX; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2240 | rfc.retrans_timeout = 0; |
| 2241 | rfc.monitor_timeout = 0; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2242 | rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2243 | |
| 2244 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2245 | sizeof(rfc), (unsigned long) &rfc); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2246 | |
| 2247 | if (!(pi->conn->feat_mask & L2CAP_FEAT_FCS)) |
| 2248 | break; |
| 2249 | |
| 2250 | if (pi->fcs == L2CAP_FCS_NONE || |
| 2251 | pi->conf_state & L2CAP_CONF_NO_FCS_RECV) { |
| 2252 | pi->fcs = L2CAP_FCS_NONE; |
| 2253 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, pi->fcs); |
| 2254 | } |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2255 | break; |
| 2256 | |
| 2257 | case L2CAP_MODE_STREAMING: |
| 2258 | rfc.mode = L2CAP_MODE_STREAMING; |
| 2259 | rfc.txwin_size = 0; |
| 2260 | rfc.max_transmit = 0; |
| 2261 | rfc.retrans_timeout = 0; |
| 2262 | rfc.monitor_timeout = 0; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 2263 | rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE); |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 2264 | |
| 2265 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2266 | sizeof(rfc), (unsigned long) &rfc); |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2267 | |
| 2268 | if (!(pi->conn->feat_mask & L2CAP_FEAT_FCS)) |
| 2269 | break; |
| 2270 | |
| 2271 | if (pi->fcs == L2CAP_FCS_NONE || |
| 2272 | pi->conf_state & L2CAP_CONF_NO_FCS_RECV) { |
| 2273 | pi->fcs = L2CAP_FCS_NONE; |
| 2274 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, pi->fcs); |
| 2275 | } |
Marcel Holtmann | 65c7c49 | 2009-05-02 23:07:53 -0700 | [diff] [blame] | 2276 | break; |
| 2277 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2278 | |
| 2279 | /* FIXME: Need actual value of the flush timeout */ |
| 2280 | //if (flush_to != L2CAP_DEFAULT_FLUSH_TO) |
| 2281 | // l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, 2, pi->flush_to); |
| 2282 | |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2283 | req->dcid = cpu_to_le16(pi->dcid); |
| 2284 | req->flags = cpu_to_le16(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2285 | |
| 2286 | return ptr - data; |
| 2287 | } |
| 2288 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2289 | static int l2cap_parse_conf_req(struct sock *sk, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2290 | { |
| 2291 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2292 | struct l2cap_conf_rsp *rsp = data; |
| 2293 | void *ptr = rsp->data; |
| 2294 | void *req = pi->conf_req; |
| 2295 | int len = pi->conf_len; |
| 2296 | int type, hint, olen; |
| 2297 | unsigned long val; |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2298 | struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC }; |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 2299 | u16 mtu = L2CAP_DEFAULT_MTU; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2300 | u16 result = L2CAP_CONF_SUCCESS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2301 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2302 | BT_DBG("sk %p", sk); |
Marcel Holtmann | 820ae1b | 2006-11-18 22:15:00 +0100 | [diff] [blame] | 2303 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2304 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 2305 | len -= l2cap_get_conf_opt(&req, &type, &olen, &val); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2306 | |
Gustavo F. Padovan | 589d274 | 2009-04-20 01:31:07 -0300 | [diff] [blame] | 2307 | hint = type & L2CAP_CONF_HINT; |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 2308 | type &= L2CAP_CONF_MASK; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2309 | |
| 2310 | switch (type) { |
| 2311 | case L2CAP_CONF_MTU: |
Marcel Holtmann | 861d688 | 2007-10-20 13:37:06 +0200 | [diff] [blame] | 2312 | mtu = val; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2313 | break; |
| 2314 | |
| 2315 | case L2CAP_CONF_FLUSH_TO: |
| 2316 | pi->flush_to = val; |
| 2317 | break; |
| 2318 | |
| 2319 | case L2CAP_CONF_QOS: |
| 2320 | break; |
| 2321 | |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2322 | case L2CAP_CONF_RFC: |
| 2323 | if (olen == sizeof(rfc)) |
| 2324 | memcpy(&rfc, (void *) val, olen); |
| 2325 | break; |
| 2326 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2327 | case L2CAP_CONF_FCS: |
| 2328 | if (val == L2CAP_FCS_NONE) |
| 2329 | pi->conf_state |= L2CAP_CONF_NO_FCS_RECV; |
| 2330 | |
| 2331 | break; |
| 2332 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2333 | default: |
| 2334 | if (hint) |
| 2335 | break; |
| 2336 | |
| 2337 | result = L2CAP_CONF_UNKNOWN; |
| 2338 | *((u8 *) ptr++) = type; |
| 2339 | break; |
| 2340 | } |
| 2341 | } |
| 2342 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2343 | if (pi->num_conf_rsp || pi->num_conf_req) |
| 2344 | goto done; |
| 2345 | |
| 2346 | switch (pi->mode) { |
| 2347 | case L2CAP_MODE_STREAMING: |
| 2348 | case L2CAP_MODE_ERTM: |
| 2349 | pi->conf_state |= L2CAP_CONF_STATE2_DEVICE; |
| 2350 | if (!l2cap_mode_supported(pi->mode, pi->conn->feat_mask)) |
| 2351 | return -ECONNREFUSED; |
| 2352 | break; |
| 2353 | default: |
| 2354 | pi->mode = l2cap_select_mode(rfc.mode, pi->conn->feat_mask); |
| 2355 | break; |
| 2356 | } |
| 2357 | |
| 2358 | done: |
| 2359 | if (pi->mode != rfc.mode) { |
| 2360 | result = L2CAP_CONF_UNACCEPT; |
| 2361 | rfc.mode = pi->mode; |
| 2362 | |
| 2363 | if (pi->num_conf_rsp == 1) |
| 2364 | return -ECONNREFUSED; |
| 2365 | |
| 2366 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2367 | sizeof(rfc), (unsigned long) &rfc); |
| 2368 | } |
| 2369 | |
| 2370 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2371 | if (result == L2CAP_CONF_SUCCESS) { |
| 2372 | /* Configure output options and let the other side know |
| 2373 | * which ones we don't like. */ |
| 2374 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2375 | if (mtu < L2CAP_DEFAULT_MIN_MTU) |
| 2376 | result = L2CAP_CONF_UNACCEPT; |
| 2377 | else { |
| 2378 | pi->omtu = mtu; |
| 2379 | pi->conf_state |= L2CAP_CONF_MTU_DONE; |
| 2380 | } |
| 2381 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2382 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2383 | switch (rfc.mode) { |
| 2384 | case L2CAP_MODE_BASIC: |
| 2385 | pi->fcs = L2CAP_FCS_NONE; |
| 2386 | pi->conf_state |= L2CAP_CONF_MODE_DONE; |
| 2387 | break; |
| 2388 | |
| 2389 | case L2CAP_MODE_ERTM: |
| 2390 | pi->remote_tx_win = rfc.txwin_size; |
| 2391 | pi->remote_max_tx = rfc.max_transmit; |
| 2392 | pi->max_pdu_size = rfc.max_pdu_size; |
| 2393 | |
| 2394 | rfc.retrans_timeout = L2CAP_DEFAULT_RETRANS_TO; |
| 2395 | rfc.monitor_timeout = L2CAP_DEFAULT_MONITOR_TO; |
| 2396 | |
| 2397 | pi->conf_state |= L2CAP_CONF_MODE_DONE; |
Gustavo F. Padovan | 68ae663 | 2009-10-17 21:41:01 -0300 | [diff] [blame] | 2398 | |
| 2399 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2400 | sizeof(rfc), (unsigned long) &rfc); |
| 2401 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2402 | break; |
| 2403 | |
| 2404 | case L2CAP_MODE_STREAMING: |
| 2405 | pi->remote_tx_win = rfc.txwin_size; |
| 2406 | pi->max_pdu_size = rfc.max_pdu_size; |
| 2407 | |
| 2408 | pi->conf_state |= L2CAP_CONF_MODE_DONE; |
Gustavo F. Padovan | 68ae663 | 2009-10-17 21:41:01 -0300 | [diff] [blame] | 2409 | |
| 2410 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2411 | sizeof(rfc), (unsigned long) &rfc); |
| 2412 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2413 | break; |
| 2414 | |
| 2415 | default: |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2416 | result = L2CAP_CONF_UNACCEPT; |
| 2417 | |
| 2418 | memset(&rfc, 0, sizeof(rfc)); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2419 | rfc.mode = pi->mode; |
Marcel Holtmann | 6464f35 | 2007-10-20 13:39:51 +0200 | [diff] [blame] | 2420 | } |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2421 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2422 | if (result == L2CAP_CONF_SUCCESS) |
| 2423 | pi->conf_state |= L2CAP_CONF_OUTPUT_DONE; |
| 2424 | } |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2425 | rsp->scid = cpu_to_le16(pi->dcid); |
| 2426 | rsp->result = cpu_to_le16(result); |
| 2427 | rsp->flags = cpu_to_le16(0x0000); |
| 2428 | |
| 2429 | return ptr - data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2430 | } |
| 2431 | |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2432 | static int l2cap_parse_conf_rsp(struct sock *sk, void *rsp, int len, void *data, u16 *result) |
| 2433 | { |
| 2434 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 2435 | struct l2cap_conf_req *req = data; |
| 2436 | void *ptr = req->data; |
| 2437 | int type, olen; |
| 2438 | unsigned long val; |
| 2439 | struct l2cap_conf_rfc rfc; |
| 2440 | |
| 2441 | BT_DBG("sk %p, rsp %p, len %d, req %p", sk, rsp, len, data); |
| 2442 | |
| 2443 | while (len >= L2CAP_CONF_OPT_SIZE) { |
| 2444 | len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val); |
| 2445 | |
| 2446 | switch (type) { |
| 2447 | case L2CAP_CONF_MTU: |
| 2448 | if (val < L2CAP_DEFAULT_MIN_MTU) { |
| 2449 | *result = L2CAP_CONF_UNACCEPT; |
| 2450 | pi->omtu = L2CAP_DEFAULT_MIN_MTU; |
| 2451 | } else |
| 2452 | pi->omtu = val; |
| 2453 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu); |
| 2454 | break; |
| 2455 | |
| 2456 | case L2CAP_CONF_FLUSH_TO: |
| 2457 | pi->flush_to = val; |
| 2458 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, |
| 2459 | 2, pi->flush_to); |
| 2460 | break; |
| 2461 | |
| 2462 | case L2CAP_CONF_RFC: |
| 2463 | if (olen == sizeof(rfc)) |
| 2464 | memcpy(&rfc, (void *)val, olen); |
| 2465 | |
| 2466 | if ((pi->conf_state & L2CAP_CONF_STATE2_DEVICE) && |
| 2467 | rfc.mode != pi->mode) |
| 2468 | return -ECONNREFUSED; |
| 2469 | |
| 2470 | pi->mode = rfc.mode; |
| 2471 | pi->fcs = 0; |
| 2472 | |
| 2473 | l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, |
| 2474 | sizeof(rfc), (unsigned long) &rfc); |
| 2475 | break; |
| 2476 | } |
| 2477 | } |
| 2478 | |
| 2479 | if (*result == L2CAP_CONF_SUCCESS) { |
| 2480 | switch (rfc.mode) { |
| 2481 | case L2CAP_MODE_ERTM: |
| 2482 | pi->remote_tx_win = rfc.txwin_size; |
| 2483 | pi->retrans_timeout = rfc.retrans_timeout; |
| 2484 | pi->monitor_timeout = rfc.monitor_timeout; |
| 2485 | pi->max_pdu_size = le16_to_cpu(rfc.max_pdu_size); |
| 2486 | break; |
| 2487 | case L2CAP_MODE_STREAMING: |
| 2488 | pi->max_pdu_size = le16_to_cpu(rfc.max_pdu_size); |
| 2489 | break; |
| 2490 | } |
| 2491 | } |
| 2492 | |
| 2493 | req->dcid = cpu_to_le16(pi->dcid); |
| 2494 | req->flags = cpu_to_le16(0x0000); |
| 2495 | |
| 2496 | return ptr - data; |
| 2497 | } |
| 2498 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2499 | 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] | 2500 | { |
| 2501 | struct l2cap_conf_rsp *rsp = data; |
| 2502 | void *ptr = rsp->data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2503 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2504 | BT_DBG("sk %p", sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2505 | |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2506 | rsp->scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2507 | rsp->result = cpu_to_le16(result); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2508 | rsp->flags = cpu_to_le16(flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2509 | |
| 2510 | return ptr - data; |
| 2511 | } |
| 2512 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2513 | static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2514 | { |
| 2515 | struct l2cap_cmd_rej *rej = (struct l2cap_cmd_rej *) data; |
| 2516 | |
| 2517 | if (rej->reason != 0x0000) |
| 2518 | return 0; |
| 2519 | |
| 2520 | if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) && |
| 2521 | cmd->ident == conn->info_ident) { |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2522 | del_timer(&conn->info_timer); |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2523 | |
| 2524 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 2525 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2526 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2527 | l2cap_conn_start(conn); |
| 2528 | } |
| 2529 | |
| 2530 | return 0; |
| 2531 | } |
| 2532 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2533 | static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2534 | { |
| 2535 | struct l2cap_chan_list *list = &conn->chan_list; |
| 2536 | struct l2cap_conn_req *req = (struct l2cap_conn_req *) data; |
| 2537 | struct l2cap_conn_rsp rsp; |
| 2538 | struct sock *sk, *parent; |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2539 | int result, status = L2CAP_CS_NO_INFO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2540 | |
| 2541 | u16 dcid = 0, scid = __le16_to_cpu(req->scid); |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2542 | __le16 psm = req->psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2543 | |
| 2544 | BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid); |
| 2545 | |
| 2546 | /* Check if we have socket listening on psm */ |
| 2547 | parent = l2cap_get_sock_by_psm(BT_LISTEN, psm, conn->src); |
| 2548 | if (!parent) { |
| 2549 | result = L2CAP_CR_BAD_PSM; |
| 2550 | goto sendresp; |
| 2551 | } |
| 2552 | |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2553 | /* Check if the ACL is secure enough (if not SDP) */ |
| 2554 | if (psm != cpu_to_le16(0x0001) && |
| 2555 | !hci_conn_check_link_mode(conn->hcon)) { |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 2556 | conn->disc_reason = 0x05; |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 2557 | result = L2CAP_CR_SEC_BLOCK; |
| 2558 | goto response; |
| 2559 | } |
| 2560 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2561 | result = L2CAP_CR_NO_MEM; |
| 2562 | |
| 2563 | /* Check for backlog size */ |
| 2564 | if (sk_acceptq_is_full(parent)) { |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 2565 | BT_DBG("backlog full %d", parent->sk_ack_backlog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2566 | goto response; |
| 2567 | } |
| 2568 | |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 2569 | sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2570 | if (!sk) |
| 2571 | goto response; |
| 2572 | |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 2573 | write_lock_bh(&list->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2574 | |
| 2575 | /* Check if we already have channel with that dcid */ |
| 2576 | if (__l2cap_get_chan_by_dcid(list, scid)) { |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 2577 | write_unlock_bh(&list->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2578 | sock_set_flag(sk, SOCK_ZAPPED); |
| 2579 | l2cap_sock_kill(sk); |
| 2580 | goto response; |
| 2581 | } |
| 2582 | |
| 2583 | hci_conn_hold(conn->hcon); |
| 2584 | |
| 2585 | l2cap_sock_init(sk, parent); |
| 2586 | bacpy(&bt_sk(sk)->src, conn->src); |
| 2587 | bacpy(&bt_sk(sk)->dst, conn->dst); |
| 2588 | l2cap_pi(sk)->psm = psm; |
| 2589 | l2cap_pi(sk)->dcid = scid; |
| 2590 | |
| 2591 | __l2cap_chan_add(conn, sk, parent); |
| 2592 | dcid = l2cap_pi(sk)->scid; |
| 2593 | |
| 2594 | l2cap_sock_set_timer(sk, sk->sk_sndtimeo); |
| 2595 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2596 | l2cap_pi(sk)->ident = cmd->ident; |
| 2597 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2598 | if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 2599 | if (l2cap_check_security(sk)) { |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 2600 | if (bt_sk(sk)->defer_setup) { |
| 2601 | sk->sk_state = BT_CONNECT2; |
| 2602 | result = L2CAP_CR_PEND; |
| 2603 | status = L2CAP_CS_AUTHOR_PEND; |
| 2604 | parent->sk_data_ready(parent, 0); |
| 2605 | } else { |
| 2606 | sk->sk_state = BT_CONFIG; |
| 2607 | result = L2CAP_CR_SUCCESS; |
| 2608 | status = L2CAP_CS_NO_INFO; |
| 2609 | } |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2610 | } else { |
| 2611 | sk->sk_state = BT_CONNECT2; |
| 2612 | result = L2CAP_CR_PEND; |
| 2613 | status = L2CAP_CS_AUTHEN_PEND; |
| 2614 | } |
| 2615 | } else { |
| 2616 | sk->sk_state = BT_CONNECT2; |
| 2617 | result = L2CAP_CR_PEND; |
| 2618 | status = L2CAP_CS_NO_INFO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2619 | } |
| 2620 | |
Marcel Holtmann | fd1278d | 2006-07-12 23:00:07 +0200 | [diff] [blame] | 2621 | write_unlock_bh(&list->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2622 | |
| 2623 | response: |
| 2624 | bh_unlock_sock(parent); |
| 2625 | |
| 2626 | sendresp: |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2627 | rsp.scid = cpu_to_le16(scid); |
| 2628 | rsp.dcid = cpu_to_le16(dcid); |
| 2629 | rsp.result = cpu_to_le16(result); |
| 2630 | rsp.status = cpu_to_le16(status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2631 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2632 | |
| 2633 | if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) { |
| 2634 | struct l2cap_info_req info; |
| 2635 | info.type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 2636 | |
| 2637 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT; |
| 2638 | conn->info_ident = l2cap_get_ident(conn); |
| 2639 | |
| 2640 | mod_timer(&conn->info_timer, jiffies + |
| 2641 | msecs_to_jiffies(L2CAP_INFO_TIMEOUT)); |
| 2642 | |
| 2643 | l2cap_send_cmd(conn, conn->info_ident, |
| 2644 | L2CAP_INFO_REQ, sizeof(info), &info); |
| 2645 | } |
| 2646 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2647 | return 0; |
| 2648 | } |
| 2649 | |
| 2650 | static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2651 | { |
| 2652 | struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data; |
| 2653 | u16 scid, dcid, result, status; |
| 2654 | struct sock *sk; |
| 2655 | u8 req[128]; |
| 2656 | |
| 2657 | scid = __le16_to_cpu(rsp->scid); |
| 2658 | dcid = __le16_to_cpu(rsp->dcid); |
| 2659 | result = __le16_to_cpu(rsp->result); |
| 2660 | status = __le16_to_cpu(rsp->status); |
| 2661 | |
| 2662 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid, scid, result, status); |
| 2663 | |
| 2664 | if (scid) { |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2665 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
| 2666 | if (!sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2667 | return 0; |
| 2668 | } else { |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2669 | sk = l2cap_get_chan_by_ident(&conn->chan_list, cmd->ident); |
| 2670 | if (!sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2671 | return 0; |
| 2672 | } |
| 2673 | |
| 2674 | switch (result) { |
| 2675 | case L2CAP_CR_SUCCESS: |
| 2676 | sk->sk_state = BT_CONFIG; |
| 2677 | l2cap_pi(sk)->ident = 0; |
| 2678 | l2cap_pi(sk)->dcid = dcid; |
| 2679 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT; |
| 2680 | |
Marcel Holtmann | 6a8d301 | 2009-02-06 23:56:36 +0100 | [diff] [blame] | 2681 | l2cap_pi(sk)->conf_state &= ~L2CAP_CONF_CONNECT_PEND; |
| 2682 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2683 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
| 2684 | l2cap_build_conf_req(sk, req), req); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2685 | l2cap_pi(sk)->num_conf_req++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2686 | break; |
| 2687 | |
| 2688 | case L2CAP_CR_PEND: |
Marcel Holtmann | 6a8d301 | 2009-02-06 23:56:36 +0100 | [diff] [blame] | 2689 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2690 | break; |
| 2691 | |
| 2692 | default: |
| 2693 | l2cap_chan_del(sk, ECONNREFUSED); |
| 2694 | break; |
| 2695 | } |
| 2696 | |
| 2697 | bh_unlock_sock(sk); |
| 2698 | return 0; |
| 2699 | } |
| 2700 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 2701 | 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] | 2702 | { |
| 2703 | struct l2cap_conf_req *req = (struct l2cap_conf_req *) data; |
| 2704 | u16 dcid, flags; |
| 2705 | u8 rsp[64]; |
| 2706 | struct sock *sk; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2707 | int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2708 | |
| 2709 | dcid = __le16_to_cpu(req->dcid); |
| 2710 | flags = __le16_to_cpu(req->flags); |
| 2711 | |
| 2712 | BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags); |
| 2713 | |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2714 | sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid); |
| 2715 | if (!sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2716 | return -ENOENT; |
| 2717 | |
Marcel Holtmann | 354f60a | 2006-11-18 22:15:20 +0100 | [diff] [blame] | 2718 | if (sk->sk_state == BT_DISCONN) |
| 2719 | goto unlock; |
| 2720 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2721 | /* Reject if config buffer is too small. */ |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 2722 | len = cmd_len - sizeof(*req); |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2723 | if (l2cap_pi(sk)->conf_len + len > sizeof(l2cap_pi(sk)->conf_req)) { |
| 2724 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
| 2725 | l2cap_build_conf_rsp(sk, rsp, |
| 2726 | L2CAP_CONF_REJECT, flags), rsp); |
| 2727 | goto unlock; |
| 2728 | } |
| 2729 | |
| 2730 | /* Store config. */ |
| 2731 | memcpy(l2cap_pi(sk)->conf_req + l2cap_pi(sk)->conf_len, req->data, len); |
| 2732 | l2cap_pi(sk)->conf_len += len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2733 | |
| 2734 | if (flags & 0x0001) { |
| 2735 | /* Incomplete config. Send empty response. */ |
| 2736 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2737 | l2cap_build_conf_rsp(sk, rsp, |
| 2738 | L2CAP_CONF_SUCCESS, 0x0001), rsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2739 | goto unlock; |
| 2740 | } |
| 2741 | |
| 2742 | /* Complete config. */ |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2743 | len = l2cap_parse_conf_req(sk, rsp); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2744 | if (len < 0) { |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 2745 | l2cap_send_disconn_req(conn, sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2746 | goto unlock; |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2747 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2748 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2749 | l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2750 | l2cap_pi(sk)->num_conf_rsp++; |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2751 | |
Marcel Holtmann | 5dee9e7 | 2007-05-24 14:27:19 +0200 | [diff] [blame] | 2752 | /* Reset config buffer. */ |
| 2753 | l2cap_pi(sk)->conf_len = 0; |
| 2754 | |
Marcel Holtmann | 876d948 | 2007-10-20 13:35:42 +0200 | [diff] [blame] | 2755 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE)) |
| 2756 | goto unlock; |
| 2757 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2758 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_INPUT_DONE) { |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame^] | 2759 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_NO_FCS_RECV) || |
| 2760 | l2cap_pi(sk)->fcs != L2CAP_FCS_NONE) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2761 | l2cap_pi(sk)->fcs = L2CAP_FCS_CRC16; |
| 2762 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2763 | sk->sk_state = BT_CONNECTED; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 2764 | l2cap_pi(sk)->next_tx_seq = 0; |
| 2765 | l2cap_pi(sk)->expected_ack_seq = 0; |
| 2766 | l2cap_pi(sk)->unacked_frames = 0; |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 2767 | |
| 2768 | setup_timer(&l2cap_pi(sk)->retrans_timer, |
| 2769 | l2cap_retrans_timeout, (unsigned long) sk); |
| 2770 | setup_timer(&l2cap_pi(sk)->monitor_timer, |
| 2771 | l2cap_monitor_timeout, (unsigned long) sk); |
| 2772 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 2773 | __skb_queue_head_init(TX_QUEUE(sk)); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 2774 | __skb_queue_head_init(SREJ_QUEUE(sk)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2775 | l2cap_chan_ready(sk); |
Marcel Holtmann | 876d948 | 2007-10-20 13:35:42 +0200 | [diff] [blame] | 2776 | goto unlock; |
| 2777 | } |
| 2778 | |
| 2779 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT)) { |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2780 | u8 buf[64]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2781 | l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ, |
Marcel Holtmann | 79d554a | 2008-07-14 20:13:44 +0200 | [diff] [blame] | 2782 | l2cap_build_conf_req(sk, buf), buf); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2783 | l2cap_pi(sk)->num_conf_req++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2784 | } |
| 2785 | |
| 2786 | unlock: |
| 2787 | bh_unlock_sock(sk); |
| 2788 | return 0; |
| 2789 | } |
| 2790 | |
| 2791 | static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2792 | { |
| 2793 | struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data; |
| 2794 | u16 scid, flags, result; |
| 2795 | struct sock *sk; |
| 2796 | |
| 2797 | scid = __le16_to_cpu(rsp->scid); |
| 2798 | flags = __le16_to_cpu(rsp->flags); |
| 2799 | result = __le16_to_cpu(rsp->result); |
| 2800 | |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2801 | BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x", |
| 2802 | scid, flags, result); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2803 | |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2804 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
| 2805 | if (!sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2806 | return 0; |
| 2807 | |
| 2808 | switch (result) { |
| 2809 | case L2CAP_CONF_SUCCESS: |
| 2810 | break; |
| 2811 | |
| 2812 | case L2CAP_CONF_UNACCEPT: |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2813 | if (l2cap_pi(sk)->num_conf_rsp <= L2CAP_CONF_MAX_CONF_RSP) { |
| 2814 | int len = cmd->len - sizeof(*rsp); |
| 2815 | char req[64]; |
| 2816 | |
| 2817 | /* throw out any old stored conf requests */ |
| 2818 | result = L2CAP_CONF_SUCCESS; |
| 2819 | len = l2cap_parse_conf_rsp(sk, rsp->data, |
| 2820 | len, req, &result); |
| 2821 | if (len < 0) { |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 2822 | l2cap_send_disconn_req(conn, sk); |
Gustavo F. Padovan | f2fcfcd | 2009-07-04 15:06:24 -0300 | [diff] [blame] | 2823 | goto done; |
| 2824 | } |
| 2825 | |
| 2826 | l2cap_send_cmd(conn, l2cap_get_ident(conn), |
| 2827 | L2CAP_CONF_REQ, len, req); |
| 2828 | l2cap_pi(sk)->num_conf_req++; |
| 2829 | if (result != L2CAP_CONF_SUCCESS) |
| 2830 | goto done; |
| 2831 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2832 | } |
| 2833 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 2834 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2835 | sk->sk_state = BT_DISCONN; |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 2836 | sk->sk_err = ECONNRESET; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2837 | l2cap_sock_set_timer(sk, HZ * 5); |
Gustavo F. Padovan | 22121fc | 2009-07-23 10:27:23 -0300 | [diff] [blame] | 2838 | l2cap_send_disconn_req(conn, sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2839 | goto done; |
| 2840 | } |
| 2841 | |
| 2842 | if (flags & 0x01) |
| 2843 | goto done; |
| 2844 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2845 | l2cap_pi(sk)->conf_state |= L2CAP_CONF_INPUT_DONE; |
| 2846 | |
| 2847 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE) { |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame^] | 2848 | if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_NO_FCS_RECV) || |
| 2849 | l2cap_pi(sk)->fcs != L2CAP_FCS_NONE) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2850 | l2cap_pi(sk)->fcs = L2CAP_FCS_CRC16; |
| 2851 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2852 | sk->sk_state = BT_CONNECTED; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 2853 | l2cap_pi(sk)->expected_tx_seq = 0; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 2854 | l2cap_pi(sk)->buffer_seq = 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 2855 | l2cap_pi(sk)->num_to_ack = 0; |
| 2856 | __skb_queue_head_init(TX_QUEUE(sk)); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 2857 | __skb_queue_head_init(SREJ_QUEUE(sk)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2858 | l2cap_chan_ready(sk); |
| 2859 | } |
| 2860 | |
| 2861 | done: |
| 2862 | bh_unlock_sock(sk); |
| 2863 | return 0; |
| 2864 | } |
| 2865 | |
| 2866 | static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2867 | { |
| 2868 | struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data; |
| 2869 | struct l2cap_disconn_rsp rsp; |
| 2870 | u16 dcid, scid; |
| 2871 | struct sock *sk; |
| 2872 | |
| 2873 | scid = __le16_to_cpu(req->scid); |
| 2874 | dcid = __le16_to_cpu(req->dcid); |
| 2875 | |
| 2876 | BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid); |
| 2877 | |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2878 | sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid); |
| 2879 | if (!sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2880 | return 0; |
| 2881 | |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 2882 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 2883 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2884 | l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp); |
| 2885 | |
| 2886 | sk->sk_shutdown = SHUTDOWN_MASK; |
| 2887 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 2888 | skb_queue_purge(TX_QUEUE(sk)); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 2889 | skb_queue_purge(SREJ_QUEUE(sk)); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 2890 | del_timer(&l2cap_pi(sk)->retrans_timer); |
| 2891 | del_timer(&l2cap_pi(sk)->monitor_timer); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 2892 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2893 | l2cap_chan_del(sk, ECONNRESET); |
| 2894 | bh_unlock_sock(sk); |
| 2895 | |
| 2896 | l2cap_sock_kill(sk); |
| 2897 | return 0; |
| 2898 | } |
| 2899 | |
| 2900 | static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2901 | { |
| 2902 | struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data; |
| 2903 | u16 dcid, scid; |
| 2904 | struct sock *sk; |
| 2905 | |
| 2906 | scid = __le16_to_cpu(rsp->scid); |
| 2907 | dcid = __le16_to_cpu(rsp->dcid); |
| 2908 | |
| 2909 | BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid); |
| 2910 | |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 2911 | sk = l2cap_get_chan_by_scid(&conn->chan_list, scid); |
| 2912 | if (!sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2913 | return 0; |
| 2914 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 2915 | skb_queue_purge(TX_QUEUE(sk)); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 2916 | skb_queue_purge(SREJ_QUEUE(sk)); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 2917 | del_timer(&l2cap_pi(sk)->retrans_timer); |
| 2918 | del_timer(&l2cap_pi(sk)->monitor_timer); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 2919 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2920 | l2cap_chan_del(sk, 0); |
| 2921 | bh_unlock_sock(sk); |
| 2922 | |
| 2923 | l2cap_sock_kill(sk); |
| 2924 | return 0; |
| 2925 | } |
| 2926 | |
| 2927 | static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2928 | { |
| 2929 | struct l2cap_info_req *req = (struct l2cap_info_req *) data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2930 | u16 type; |
| 2931 | |
| 2932 | type = __le16_to_cpu(req->type); |
| 2933 | |
| 2934 | BT_DBG("type 0x%4.4x", type); |
| 2935 | |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 2936 | if (type == L2CAP_IT_FEAT_MASK) { |
| 2937 | u8 buf[8]; |
Marcel Holtmann | 44dd46d | 2009-05-02 19:09:01 -0700 | [diff] [blame] | 2938 | u32 feat_mask = l2cap_feat_mask; |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 2939 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
| 2940 | rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK); |
| 2941 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); |
Marcel Holtmann | 44dd46d | 2009-05-02 19:09:01 -0700 | [diff] [blame] | 2942 | if (enable_ertm) |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 2943 | feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING |
| 2944 | | L2CAP_FEAT_FCS; |
Gustavo F. Padovan | 1b7bf4e | 2009-08-24 00:45:20 -0300 | [diff] [blame] | 2945 | put_unaligned_le32(feat_mask, rsp->data); |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 2946 | l2cap_send_cmd(conn, cmd->ident, |
| 2947 | L2CAP_INFO_RSP, sizeof(buf), buf); |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 2948 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
| 2949 | u8 buf[12]; |
| 2950 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf; |
| 2951 | rsp->type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); |
| 2952 | rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS); |
| 2953 | memcpy(buf + 4, l2cap_fixed_chan, 8); |
| 2954 | l2cap_send_cmd(conn, cmd->ident, |
| 2955 | L2CAP_INFO_RSP, sizeof(buf), buf); |
Marcel Holtmann | f0709e0 | 2007-10-20 13:38:51 +0200 | [diff] [blame] | 2956 | } else { |
| 2957 | struct l2cap_info_rsp rsp; |
| 2958 | rsp.type = cpu_to_le16(type); |
| 2959 | rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP); |
| 2960 | l2cap_send_cmd(conn, cmd->ident, |
| 2961 | L2CAP_INFO_RSP, sizeof(rsp), &rsp); |
| 2962 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2963 | |
| 2964 | return 0; |
| 2965 | } |
| 2966 | |
| 2967 | static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data) |
| 2968 | { |
| 2969 | struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data; |
| 2970 | u16 type, result; |
| 2971 | |
| 2972 | type = __le16_to_cpu(rsp->type); |
| 2973 | result = __le16_to_cpu(rsp->result); |
| 2974 | |
| 2975 | BT_DBG("type 0x%4.4x result 0x%2.2x", type, result); |
| 2976 | |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2977 | del_timer(&conn->info_timer); |
| 2978 | |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2979 | if (type == L2CAP_IT_FEAT_MASK) { |
Harvey Harrison | 8398531 | 2008-05-02 16:25:46 -0700 | [diff] [blame] | 2980 | conn->feat_mask = get_unaligned_le32(rsp->data); |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 2981 | |
Marcel Holtmann | 47ec1dcd | 2009-05-02 18:57:55 -0700 | [diff] [blame] | 2982 | if (conn->feat_mask & L2CAP_FEAT_FIXED_CHAN) { |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 2983 | struct l2cap_info_req req; |
| 2984 | req.type = cpu_to_le16(L2CAP_IT_FIXED_CHAN); |
| 2985 | |
| 2986 | conn->info_ident = l2cap_get_ident(conn); |
| 2987 | |
| 2988 | l2cap_send_cmd(conn, conn->info_ident, |
| 2989 | L2CAP_INFO_REQ, sizeof(req), &req); |
| 2990 | } else { |
| 2991 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
| 2992 | conn->info_ident = 0; |
| 2993 | |
| 2994 | l2cap_conn_start(conn); |
| 2995 | } |
| 2996 | } else if (type == L2CAP_IT_FIXED_CHAN) { |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2997 | conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE; |
Marcel Holtmann | e1027a7 | 2009-02-09 09:18:02 +0100 | [diff] [blame] | 2998 | conn->info_ident = 0; |
Marcel Holtmann | 984947d | 2009-02-06 23:35:19 +0100 | [diff] [blame] | 2999 | |
| 3000 | l2cap_conn_start(conn); |
| 3001 | } |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 3002 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3003 | return 0; |
| 3004 | } |
| 3005 | |
| 3006 | static inline void l2cap_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb) |
| 3007 | { |
| 3008 | u8 *data = skb->data; |
| 3009 | int len = skb->len; |
| 3010 | struct l2cap_cmd_hdr cmd; |
| 3011 | int err = 0; |
| 3012 | |
| 3013 | l2cap_raw_recv(conn, skb); |
| 3014 | |
| 3015 | while (len >= L2CAP_CMD_HDR_SIZE) { |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3016 | u16 cmd_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3017 | memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE); |
| 3018 | data += L2CAP_CMD_HDR_SIZE; |
| 3019 | len -= L2CAP_CMD_HDR_SIZE; |
| 3020 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3021 | cmd_len = le16_to_cpu(cmd.len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3022 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3023 | BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd.code, cmd_len, cmd.ident); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3024 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3025 | if (cmd_len > len || !cmd.ident) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3026 | BT_DBG("corrupted command"); |
| 3027 | break; |
| 3028 | } |
| 3029 | |
| 3030 | switch (cmd.code) { |
| 3031 | case L2CAP_COMMAND_REJ: |
Marcel Holtmann | 4e8402a | 2007-10-20 13:37:56 +0200 | [diff] [blame] | 3032 | l2cap_command_rej(conn, &cmd, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3033 | break; |
| 3034 | |
| 3035 | case L2CAP_CONN_REQ: |
| 3036 | err = l2cap_connect_req(conn, &cmd, data); |
| 3037 | break; |
| 3038 | |
| 3039 | case L2CAP_CONN_RSP: |
| 3040 | err = l2cap_connect_rsp(conn, &cmd, data); |
| 3041 | break; |
| 3042 | |
| 3043 | case L2CAP_CONF_REQ: |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3044 | err = l2cap_config_req(conn, &cmd, cmd_len, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3045 | break; |
| 3046 | |
| 3047 | case L2CAP_CONF_RSP: |
| 3048 | err = l2cap_config_rsp(conn, &cmd, data); |
| 3049 | break; |
| 3050 | |
| 3051 | case L2CAP_DISCONN_REQ: |
| 3052 | err = l2cap_disconnect_req(conn, &cmd, data); |
| 3053 | break; |
| 3054 | |
| 3055 | case L2CAP_DISCONN_RSP: |
| 3056 | err = l2cap_disconnect_rsp(conn, &cmd, data); |
| 3057 | break; |
| 3058 | |
| 3059 | case L2CAP_ECHO_REQ: |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3060 | l2cap_send_cmd(conn, cmd.ident, L2CAP_ECHO_RSP, cmd_len, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3061 | break; |
| 3062 | |
| 3063 | case L2CAP_ECHO_RSP: |
| 3064 | break; |
| 3065 | |
| 3066 | case L2CAP_INFO_REQ: |
| 3067 | err = l2cap_information_req(conn, &cmd, data); |
| 3068 | break; |
| 3069 | |
| 3070 | case L2CAP_INFO_RSP: |
| 3071 | err = l2cap_information_rsp(conn, &cmd, data); |
| 3072 | break; |
| 3073 | |
| 3074 | default: |
| 3075 | BT_ERR("Unknown signaling command 0x%2.2x", cmd.code); |
| 3076 | err = -EINVAL; |
| 3077 | break; |
| 3078 | } |
| 3079 | |
| 3080 | if (err) { |
| 3081 | struct l2cap_cmd_rej rej; |
| 3082 | BT_DBG("error %d", err); |
| 3083 | |
| 3084 | /* FIXME: Map err to a valid reason */ |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 3085 | rej.reason = cpu_to_le16(0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3086 | l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej); |
| 3087 | } |
| 3088 | |
Al Viro | 88219a0 | 2007-07-29 00:17:25 -0700 | [diff] [blame] | 3089 | data += cmd_len; |
| 3090 | len -= cmd_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3091 | } |
| 3092 | |
| 3093 | kfree_skb(skb); |
| 3094 | } |
| 3095 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3096 | static int l2cap_check_fcs(struct l2cap_pinfo *pi, struct sk_buff *skb) |
| 3097 | { |
| 3098 | u16 our_fcs, rcv_fcs; |
| 3099 | int hdr_size = L2CAP_HDR_SIZE + 2; |
| 3100 | |
| 3101 | if (pi->fcs == L2CAP_FCS_CRC16) { |
| 3102 | skb_trim(skb, skb->len - 2); |
| 3103 | rcv_fcs = get_unaligned_le16(skb->data + skb->len); |
| 3104 | our_fcs = crc16(0, skb->data - hdr_size, skb->len + hdr_size); |
| 3105 | |
| 3106 | if (our_fcs != rcv_fcs) |
| 3107 | return -EINVAL; |
| 3108 | } |
| 3109 | return 0; |
| 3110 | } |
| 3111 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3112 | static void l2cap_add_to_srej_queue(struct sock *sk, struct sk_buff *skb, u8 tx_seq, u8 sar) |
| 3113 | { |
| 3114 | struct sk_buff *next_skb; |
| 3115 | |
| 3116 | bt_cb(skb)->tx_seq = tx_seq; |
| 3117 | bt_cb(skb)->sar = sar; |
| 3118 | |
| 3119 | next_skb = skb_peek(SREJ_QUEUE(sk)); |
| 3120 | if (!next_skb) { |
| 3121 | __skb_queue_tail(SREJ_QUEUE(sk), skb); |
| 3122 | return; |
| 3123 | } |
| 3124 | |
| 3125 | do { |
| 3126 | if (bt_cb(next_skb)->tx_seq > tx_seq) { |
| 3127 | __skb_queue_before(SREJ_QUEUE(sk), next_skb, skb); |
| 3128 | return; |
| 3129 | } |
| 3130 | |
| 3131 | if (skb_queue_is_last(SREJ_QUEUE(sk), next_skb)) |
| 3132 | break; |
| 3133 | |
| 3134 | } while((next_skb = skb_queue_next(SREJ_QUEUE(sk), next_skb))); |
| 3135 | |
| 3136 | __skb_queue_tail(SREJ_QUEUE(sk), skb); |
| 3137 | } |
| 3138 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3139 | static int l2cap_sar_reassembly_sdu(struct sock *sk, struct sk_buff *skb, u16 control) |
| 3140 | { |
| 3141 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 3142 | struct sk_buff *_skb; |
| 3143 | int err = -EINVAL; |
| 3144 | |
| 3145 | switch (control & L2CAP_CTRL_SAR) { |
| 3146 | case L2CAP_SDU_UNSEGMENTED: |
| 3147 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) { |
| 3148 | kfree_skb(pi->sdu); |
| 3149 | break; |
| 3150 | } |
| 3151 | |
| 3152 | err = sock_queue_rcv_skb(sk, skb); |
| 3153 | if (!err) |
| 3154 | return 0; |
| 3155 | |
| 3156 | break; |
| 3157 | |
| 3158 | case L2CAP_SDU_START: |
| 3159 | if (pi->conn_state & L2CAP_CONN_SAR_SDU) { |
| 3160 | kfree_skb(pi->sdu); |
| 3161 | break; |
| 3162 | } |
| 3163 | |
| 3164 | pi->sdu_len = get_unaligned_le16(skb->data); |
| 3165 | skb_pull(skb, 2); |
| 3166 | |
| 3167 | pi->sdu = bt_skb_alloc(pi->sdu_len, GFP_ATOMIC); |
| 3168 | if (!pi->sdu) { |
| 3169 | err = -ENOMEM; |
| 3170 | break; |
| 3171 | } |
| 3172 | |
| 3173 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); |
| 3174 | |
| 3175 | pi->conn_state |= L2CAP_CONN_SAR_SDU; |
| 3176 | pi->partial_sdu_len = skb->len; |
| 3177 | err = 0; |
| 3178 | break; |
| 3179 | |
| 3180 | case L2CAP_SDU_CONTINUE: |
| 3181 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) |
| 3182 | break; |
| 3183 | |
| 3184 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); |
| 3185 | |
| 3186 | pi->partial_sdu_len += skb->len; |
| 3187 | if (pi->partial_sdu_len > pi->sdu_len) |
| 3188 | kfree_skb(pi->sdu); |
| 3189 | else |
| 3190 | err = 0; |
| 3191 | |
| 3192 | break; |
| 3193 | |
| 3194 | case L2CAP_SDU_END: |
| 3195 | if (!(pi->conn_state & L2CAP_CONN_SAR_SDU)) |
| 3196 | break; |
| 3197 | |
| 3198 | memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len); |
| 3199 | |
| 3200 | pi->conn_state &= ~L2CAP_CONN_SAR_SDU; |
| 3201 | pi->partial_sdu_len += skb->len; |
| 3202 | |
| 3203 | if (pi->partial_sdu_len == pi->sdu_len) { |
| 3204 | _skb = skb_clone(pi->sdu, GFP_ATOMIC); |
| 3205 | err = sock_queue_rcv_skb(sk, _skb); |
| 3206 | if (err < 0) |
| 3207 | kfree_skb(_skb); |
| 3208 | } |
| 3209 | kfree_skb(pi->sdu); |
| 3210 | err = 0; |
| 3211 | |
| 3212 | break; |
| 3213 | } |
| 3214 | |
| 3215 | kfree_skb(skb); |
| 3216 | return err; |
| 3217 | } |
| 3218 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3219 | static void l2cap_check_srej_gap(struct sock *sk, u8 tx_seq) |
| 3220 | { |
| 3221 | struct sk_buff *skb; |
| 3222 | u16 control = 0; |
| 3223 | |
| 3224 | while((skb = skb_peek(SREJ_QUEUE(sk)))) { |
| 3225 | if (bt_cb(skb)->tx_seq != tx_seq) |
| 3226 | break; |
| 3227 | |
| 3228 | skb = skb_dequeue(SREJ_QUEUE(sk)); |
| 3229 | control |= bt_cb(skb)->sar << L2CAP_CTRL_SAR_SHIFT; |
| 3230 | l2cap_sar_reassembly_sdu(sk, skb, control); |
| 3231 | l2cap_pi(sk)->buffer_seq_srej = |
| 3232 | (l2cap_pi(sk)->buffer_seq_srej + 1) % 64; |
| 3233 | tx_seq++; |
| 3234 | } |
| 3235 | } |
| 3236 | |
| 3237 | static void l2cap_resend_srejframe(struct sock *sk, u8 tx_seq) |
| 3238 | { |
| 3239 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 3240 | struct srej_list *l, *tmp; |
| 3241 | u16 control; |
| 3242 | |
| 3243 | list_for_each_entry_safe(l,tmp, SREJ_LIST(sk), list) { |
| 3244 | if (l->tx_seq == tx_seq) { |
| 3245 | list_del(&l->list); |
| 3246 | kfree(l); |
| 3247 | return; |
| 3248 | } |
| 3249 | control = L2CAP_SUPER_SELECT_REJECT; |
| 3250 | control |= l->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
| 3251 | l2cap_send_sframe(pi, control); |
| 3252 | list_del(&l->list); |
| 3253 | list_add_tail(&l->list, SREJ_LIST(sk)); |
| 3254 | } |
| 3255 | } |
| 3256 | |
| 3257 | static void l2cap_send_srejframe(struct sock *sk, u8 tx_seq) |
| 3258 | { |
| 3259 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 3260 | struct srej_list *new; |
| 3261 | u16 control; |
| 3262 | |
| 3263 | while (tx_seq != pi->expected_tx_seq) { |
| 3264 | control = L2CAP_SUPER_SELECT_REJECT; |
| 3265 | control |= pi->expected_tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
Gustavo F. Padovan | ef54fd9 | 2009-08-20 22:26:04 -0300 | [diff] [blame] | 3266 | if (pi->conn_state & L2CAP_CONN_SEND_PBIT) { |
| 3267 | control |= L2CAP_CTRL_POLL; |
| 3268 | pi->conn_state &= ~L2CAP_CONN_SEND_PBIT; |
| 3269 | } |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3270 | l2cap_send_sframe(pi, control); |
| 3271 | |
| 3272 | new = kzalloc(sizeof(struct srej_list), GFP_ATOMIC); |
| 3273 | new->tx_seq = pi->expected_tx_seq++; |
| 3274 | list_add_tail(&new->list, SREJ_LIST(sk)); |
| 3275 | } |
| 3276 | pi->expected_tx_seq++; |
| 3277 | } |
| 3278 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3279 | static inline int l2cap_data_channel_iframe(struct sock *sk, u16 rx_control, struct sk_buff *skb) |
| 3280 | { |
| 3281 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
| 3282 | u8 tx_seq = __get_txseq(rx_control); |
| 3283 | u16 tx_control = 0; |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3284 | u8 sar = rx_control >> L2CAP_CTRL_SAR_SHIFT; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3285 | int err = 0; |
| 3286 | |
| 3287 | BT_DBG("sk %p rx_control 0x%4.4x len %d", sk, rx_control, skb->len); |
| 3288 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3289 | if (tx_seq == pi->expected_tx_seq) |
| 3290 | goto expected; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3291 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3292 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { |
| 3293 | struct srej_list *first; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3294 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3295 | first = list_first_entry(SREJ_LIST(sk), |
| 3296 | struct srej_list, list); |
| 3297 | if (tx_seq == first->tx_seq) { |
| 3298 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); |
| 3299 | l2cap_check_srej_gap(sk, tx_seq); |
| 3300 | |
| 3301 | list_del(&first->list); |
| 3302 | kfree(first); |
| 3303 | |
| 3304 | if (list_empty(SREJ_LIST(sk))) { |
| 3305 | pi->buffer_seq = pi->buffer_seq_srej; |
| 3306 | pi->conn_state &= ~L2CAP_CONN_SREJ_SENT; |
| 3307 | } |
| 3308 | } else { |
| 3309 | struct srej_list *l; |
| 3310 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); |
| 3311 | |
| 3312 | list_for_each_entry(l, SREJ_LIST(sk), list) { |
| 3313 | if (l->tx_seq == tx_seq) { |
| 3314 | l2cap_resend_srejframe(sk, tx_seq); |
| 3315 | return 0; |
| 3316 | } |
| 3317 | } |
| 3318 | l2cap_send_srejframe(sk, tx_seq); |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3319 | } |
| 3320 | } else { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3321 | pi->conn_state |= L2CAP_CONN_SREJ_SENT; |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3322 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3323 | INIT_LIST_HEAD(SREJ_LIST(sk)); |
| 3324 | pi->buffer_seq_srej = pi->buffer_seq; |
| 3325 | |
| 3326 | __skb_queue_head_init(SREJ_QUEUE(sk)); |
| 3327 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); |
| 3328 | |
Gustavo F. Padovan | ef54fd9 | 2009-08-20 22:26:04 -0300 | [diff] [blame] | 3329 | pi->conn_state |= L2CAP_CONN_SEND_PBIT; |
| 3330 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3331 | l2cap_send_srejframe(sk, tx_seq); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3332 | } |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3333 | return 0; |
| 3334 | |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3335 | expected: |
| 3336 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; |
| 3337 | |
| 3338 | if (pi->conn_state & L2CAP_CONN_SREJ_SENT) { |
| 3339 | l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); |
| 3340 | return 0; |
| 3341 | } |
| 3342 | |
| 3343 | pi->buffer_seq = (pi->buffer_seq + 1) % 64; |
| 3344 | |
| 3345 | err = l2cap_sar_reassembly_sdu(sk, skb, rx_control); |
| 3346 | if (err < 0) |
| 3347 | return err; |
| 3348 | |
| 3349 | pi->num_to_ack = (pi->num_to_ack + 1) % L2CAP_DEFAULT_NUM_TO_ACK; |
| 3350 | if (pi->num_to_ack == L2CAP_DEFAULT_NUM_TO_ACK - 1) { |
| 3351 | tx_control |= L2CAP_SUPER_RCV_READY; |
| 3352 | tx_control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT; |
| 3353 | l2cap_send_sframe(pi, tx_control); |
| 3354 | } |
| 3355 | return 0; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3356 | } |
| 3357 | |
| 3358 | static inline int l2cap_data_channel_sframe(struct sock *sk, u16 rx_control, struct sk_buff *skb) |
| 3359 | { |
| 3360 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3361 | u8 tx_seq = __get_reqseq(rx_control); |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3362 | |
| 3363 | BT_DBG("sk %p rx_control 0x%4.4x len %d", sk, rx_control, skb->len); |
| 3364 | |
| 3365 | switch (rx_control & L2CAP_CTRL_SUPERVISE) { |
| 3366 | case L2CAP_SUPER_RCV_READY: |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 3367 | if (rx_control & L2CAP_CTRL_POLL) { |
| 3368 | u16 control = L2CAP_CTRL_FINAL; |
Gustavo F. Padovan | ca42a61 | 2009-08-26 04:04:01 -0300 | [diff] [blame] | 3369 | control |= L2CAP_SUPER_RCV_READY | |
| 3370 | (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT); |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 3371 | l2cap_send_sframe(l2cap_pi(sk), control); |
Gustavo F. Padovan | 2246b2f | 2009-08-26 04:04:02 -0300 | [diff] [blame] | 3372 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
| 3373 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 3374 | } else if (rx_control & L2CAP_CTRL_FINAL) { |
Gustavo F. Padovan | 2246b2f | 2009-08-26 04:04:02 -0300 | [diff] [blame] | 3375 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
Gustavo F. Padovan | ca42a61 | 2009-08-26 04:04:01 -0300 | [diff] [blame] | 3376 | pi->expected_ack_seq = tx_seq; |
| 3377 | l2cap_drop_acked_frames(sk); |
| 3378 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 3379 | if (!(pi->conn_state & L2CAP_CONN_WAIT_F)) |
| 3380 | break; |
| 3381 | |
| 3382 | pi->conn_state &= ~L2CAP_CONN_WAIT_F; |
| 3383 | del_timer(&pi->monitor_timer); |
| 3384 | |
| 3385 | if (pi->unacked_frames > 0) |
| 3386 | __mod_retrans_timer(); |
| 3387 | } else { |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3388 | pi->expected_ack_seq = tx_seq; |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 3389 | l2cap_drop_acked_frames(sk); |
Gustavo F. Padovan | 2246b2f | 2009-08-26 04:04:02 -0300 | [diff] [blame] | 3390 | |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame^] | 3391 | if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY) && |
| 3392 | (pi->unacked_frames > 0)) |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 3393 | __mod_retrans_timer(); |
Gustavo F. Padovan | 2246b2f | 2009-08-26 04:04:02 -0300 | [diff] [blame] | 3394 | |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 3395 | l2cap_ertm_send(sk); |
Gustavo F. Padovan | 2246b2f | 2009-08-26 04:04:02 -0300 | [diff] [blame] | 3396 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
Gustavo F. Padovan | e90bac0 | 2009-08-20 22:26:00 -0300 | [diff] [blame] | 3397 | } |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3398 | break; |
| 3399 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3400 | case L2CAP_SUPER_REJECT: |
Gustavo F. Padovan | 2246b2f | 2009-08-26 04:04:02 -0300 | [diff] [blame] | 3401 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
| 3402 | |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3403 | pi->expected_ack_seq = __get_reqseq(rx_control); |
| 3404 | l2cap_drop_acked_frames(sk); |
| 3405 | |
| 3406 | sk->sk_send_head = TX_QUEUE(sk)->next; |
| 3407 | pi->next_tx_seq = pi->expected_ack_seq; |
| 3408 | |
| 3409 | l2cap_ertm_send(sk); |
| 3410 | |
| 3411 | break; |
| 3412 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3413 | case L2CAP_SUPER_SELECT_REJECT: |
Gustavo F. Padovan | 2246b2f | 2009-08-26 04:04:02 -0300 | [diff] [blame] | 3414 | pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; |
| 3415 | |
Gustavo F. Padovan | ef54fd9 | 2009-08-20 22:26:04 -0300 | [diff] [blame] | 3416 | if (rx_control & L2CAP_CTRL_POLL) { |
| 3417 | l2cap_retransmit_frame(sk, tx_seq); |
| 3418 | pi->expected_ack_seq = tx_seq; |
| 3419 | l2cap_drop_acked_frames(sk); |
| 3420 | l2cap_ertm_send(sk); |
| 3421 | if (pi->conn_state & L2CAP_CONN_WAIT_F) { |
| 3422 | pi->srej_save_reqseq = tx_seq; |
| 3423 | pi->conn_state |= L2CAP_CONN_SREJ_ACT; |
| 3424 | } |
| 3425 | } else if (rx_control & L2CAP_CTRL_FINAL) { |
| 3426 | if ((pi->conn_state & L2CAP_CONN_SREJ_ACT) && |
| 3427 | pi->srej_save_reqseq == tx_seq) |
| 3428 | pi->srej_save_reqseq &= ~L2CAP_CONN_SREJ_ACT; |
| 3429 | else |
| 3430 | l2cap_retransmit_frame(sk, tx_seq); |
| 3431 | } |
| 3432 | else { |
| 3433 | l2cap_retransmit_frame(sk, tx_seq); |
| 3434 | if (pi->conn_state & L2CAP_CONN_WAIT_F) { |
| 3435 | pi->srej_save_reqseq = tx_seq; |
| 3436 | pi->conn_state |= L2CAP_CONN_SREJ_ACT; |
| 3437 | } |
| 3438 | } |
Gustavo F. Padovan | 8f17154 | 2009-08-20 22:26:03 -0300 | [diff] [blame] | 3439 | break; |
| 3440 | |
| 3441 | case L2CAP_SUPER_RCV_NOT_READY: |
Gustavo F. Padovan | 2246b2f | 2009-08-26 04:04:02 -0300 | [diff] [blame] | 3442 | pi->conn_state |= L2CAP_CONN_REMOTE_BUSY; |
| 3443 | pi->expected_ack_seq = tx_seq; |
| 3444 | l2cap_drop_acked_frames(sk); |
| 3445 | |
| 3446 | del_timer(&l2cap_pi(sk)->retrans_timer); |
| 3447 | if (rx_control & L2CAP_CTRL_POLL) { |
Gustavo F. Padovan | 7e74309 | 2009-08-26 04:04:03 -0300 | [diff] [blame] | 3448 | u16 control = L2CAP_CTRL_FINAL; |
| 3449 | l2cap_send_rr_or_rnr(l2cap_pi(sk), control); |
Gustavo F. Padovan | 2246b2f | 2009-08-26 04:04:02 -0300 | [diff] [blame] | 3450 | } |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3451 | break; |
| 3452 | } |
| 3453 | |
| 3454 | return 0; |
| 3455 | } |
| 3456 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3457 | static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb) |
| 3458 | { |
| 3459 | struct sock *sk; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3460 | struct l2cap_pinfo *pi; |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3461 | u16 control, len; |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3462 | u8 tx_seq; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3463 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3464 | |
| 3465 | sk = l2cap_get_chan_by_scid(&conn->chan_list, cid); |
| 3466 | if (!sk) { |
| 3467 | BT_DBG("unknown cid 0x%4.4x", cid); |
| 3468 | goto drop; |
| 3469 | } |
| 3470 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3471 | pi = l2cap_pi(sk); |
| 3472 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3473 | BT_DBG("sk %p, len %d", sk, skb->len); |
| 3474 | |
| 3475 | if (sk->sk_state != BT_CONNECTED) |
| 3476 | goto drop; |
| 3477 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3478 | switch (pi->mode) { |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3479 | case L2CAP_MODE_BASIC: |
| 3480 | /* If socket recv buffers overflows we drop data here |
| 3481 | * which is *bad* because L2CAP has to be reliable. |
| 3482 | * But we don't have any other choice. L2CAP doesn't |
| 3483 | * provide flow control mechanism. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3484 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3485 | if (pi->imtu < skb->len) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3486 | goto drop; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3487 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3488 | if (!sock_queue_rcv_skb(sk, skb)) |
| 3489 | goto done; |
| 3490 | break; |
| 3491 | |
| 3492 | case L2CAP_MODE_ERTM: |
| 3493 | control = get_unaligned_le16(skb->data); |
| 3494 | skb_pull(skb, 2); |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3495 | len = skb->len; |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3496 | |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3497 | if (__is_sar_start(control)) |
| 3498 | len -= 2; |
| 3499 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3500 | if (pi->fcs == L2CAP_FCS_CRC16) |
| 3501 | len -= 2; |
| 3502 | |
Gustavo F. Padovan | 30afb5b | 2009-08-20 22:25:59 -0300 | [diff] [blame] | 3503 | /* |
| 3504 | * We can just drop the corrupted I-frame here. |
| 3505 | * Receiver will miss it and start proper recovery |
| 3506 | * procedures and ask retransmission. |
| 3507 | */ |
Gustavo F. Padovan | c74e560 | 2009-08-20 22:25:58 -0300 | [diff] [blame] | 3508 | if (len > L2CAP_DEFAULT_MAX_PDU_SIZE) |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3509 | goto drop; |
| 3510 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3511 | if (l2cap_check_fcs(pi, skb)) |
| 3512 | goto drop; |
| 3513 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3514 | if (__is_iframe(control)) |
| 3515 | err = l2cap_data_channel_iframe(sk, control, skb); |
| 3516 | else |
| 3517 | err = l2cap_data_channel_sframe(sk, control, skb); |
| 3518 | |
| 3519 | if (!err) |
| 3520 | goto done; |
| 3521 | break; |
| 3522 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3523 | case L2CAP_MODE_STREAMING: |
| 3524 | control = get_unaligned_le16(skb->data); |
| 3525 | skb_pull(skb, 2); |
| 3526 | len = skb->len; |
| 3527 | |
| 3528 | if (__is_sar_start(control)) |
| 3529 | len -= 2; |
| 3530 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3531 | if (pi->fcs == L2CAP_FCS_CRC16) |
| 3532 | len -= 2; |
| 3533 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3534 | if (len > L2CAP_DEFAULT_MAX_PDU_SIZE || __is_sframe(control)) |
| 3535 | goto drop; |
| 3536 | |
Gustavo F. Padovan | fcc203c | 2009-08-20 22:26:02 -0300 | [diff] [blame] | 3537 | if (l2cap_check_fcs(pi, skb)) |
| 3538 | goto drop; |
| 3539 | |
Gustavo F. Padovan | 6840ed0 | 2009-08-20 22:26:01 -0300 | [diff] [blame] | 3540 | tx_seq = __get_txseq(control); |
| 3541 | |
| 3542 | if (pi->expected_tx_seq == tx_seq) |
| 3543 | pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64; |
| 3544 | else |
| 3545 | pi->expected_tx_seq = tx_seq + 1; |
| 3546 | |
| 3547 | err = l2cap_sar_reassembly_sdu(sk, skb, control); |
| 3548 | |
| 3549 | goto done; |
| 3550 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3551 | default: |
| 3552 | BT_DBG("sk %p: bad mode 0x%2.2x", sk, l2cap_pi(sk)->mode); |
| 3553 | break; |
| 3554 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3555 | |
| 3556 | drop: |
| 3557 | kfree_skb(skb); |
| 3558 | |
| 3559 | done: |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 3560 | if (sk) |
| 3561 | bh_unlock_sock(sk); |
| 3562 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3563 | return 0; |
| 3564 | } |
| 3565 | |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 3566 | 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] | 3567 | { |
| 3568 | struct sock *sk; |
| 3569 | |
| 3570 | sk = l2cap_get_sock_by_psm(0, psm, conn->src); |
| 3571 | if (!sk) |
| 3572 | goto drop; |
| 3573 | |
| 3574 | BT_DBG("sk %p, len %d", sk, skb->len); |
| 3575 | |
| 3576 | if (sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECTED) |
| 3577 | goto drop; |
| 3578 | |
| 3579 | if (l2cap_pi(sk)->imtu < skb->len) |
| 3580 | goto drop; |
| 3581 | |
| 3582 | if (!sock_queue_rcv_skb(sk, skb)) |
| 3583 | goto done; |
| 3584 | |
| 3585 | drop: |
| 3586 | kfree_skb(skb); |
| 3587 | |
| 3588 | done: |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 3589 | if (sk) |
| 3590 | bh_unlock_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3591 | return 0; |
| 3592 | } |
| 3593 | |
| 3594 | static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb) |
| 3595 | { |
| 3596 | struct l2cap_hdr *lh = (void *) skb->data; |
Al Viro | 8e036fc | 2007-07-29 00:16:36 -0700 | [diff] [blame] | 3597 | u16 cid, len; |
| 3598 | __le16 psm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3599 | |
| 3600 | skb_pull(skb, L2CAP_HDR_SIZE); |
| 3601 | cid = __le16_to_cpu(lh->cid); |
| 3602 | len = __le16_to_cpu(lh->len); |
| 3603 | |
Gustavo F. Padovan | 1c2acff | 2009-08-20 22:25:57 -0300 | [diff] [blame] | 3604 | if (len != skb->len) { |
| 3605 | kfree_skb(skb); |
| 3606 | return; |
| 3607 | } |
| 3608 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3609 | BT_DBG("len %d, cid 0x%4.4x", len, cid); |
| 3610 | |
| 3611 | switch (cid) { |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 3612 | case L2CAP_CID_SIGNALING: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3613 | l2cap_sig_channel(conn, skb); |
| 3614 | break; |
| 3615 | |
Gustavo F. Padovan | 8db4dc4 | 2009-04-20 01:31:05 -0300 | [diff] [blame] | 3616 | case L2CAP_CID_CONN_LESS: |
Gustavo F. Padovan | 1b7bf4e | 2009-08-24 00:45:20 -0300 | [diff] [blame] | 3617 | psm = get_unaligned_le16(skb->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3618 | skb_pull(skb, 2); |
| 3619 | l2cap_conless_channel(conn, psm, skb); |
| 3620 | break; |
| 3621 | |
| 3622 | default: |
| 3623 | l2cap_data_channel(conn, cid, skb); |
| 3624 | break; |
| 3625 | } |
| 3626 | } |
| 3627 | |
| 3628 | /* ---- L2CAP interface with lower layer (HCI) ---- */ |
| 3629 | |
| 3630 | static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) |
| 3631 | { |
| 3632 | int exact = 0, lm1 = 0, lm2 = 0; |
| 3633 | register struct sock *sk; |
| 3634 | struct hlist_node *node; |
| 3635 | |
| 3636 | if (type != ACL_LINK) |
| 3637 | return 0; |
| 3638 | |
| 3639 | BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr)); |
| 3640 | |
| 3641 | /* Find listening sockets and check their link_mode */ |
| 3642 | read_lock(&l2cap_sk_list.lock); |
| 3643 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
| 3644 | if (sk->sk_state != BT_LISTEN) |
| 3645 | continue; |
| 3646 | |
| 3647 | if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) { |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 3648 | lm1 |= HCI_LM_ACCEPT; |
| 3649 | if (l2cap_pi(sk)->role_switch) |
| 3650 | lm1 |= HCI_LM_MASTER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3651 | exact++; |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 3652 | } else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) { |
| 3653 | lm2 |= HCI_LM_ACCEPT; |
| 3654 | if (l2cap_pi(sk)->role_switch) |
| 3655 | lm2 |= HCI_LM_MASTER; |
| 3656 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3657 | } |
| 3658 | read_unlock(&l2cap_sk_list.lock); |
| 3659 | |
| 3660 | return exact ? lm1 : lm2; |
| 3661 | } |
| 3662 | |
| 3663 | static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status) |
| 3664 | { |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 3665 | struct l2cap_conn *conn; |
| 3666 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3667 | BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status); |
| 3668 | |
| 3669 | if (hcon->type != ACL_LINK) |
| 3670 | return 0; |
| 3671 | |
| 3672 | if (!status) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3673 | conn = l2cap_conn_add(hcon, status); |
| 3674 | if (conn) |
| 3675 | l2cap_conn_ready(conn); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 3676 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3677 | l2cap_conn_del(hcon, bt_err(status)); |
| 3678 | |
| 3679 | return 0; |
| 3680 | } |
| 3681 | |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 3682 | static int l2cap_disconn_ind(struct hci_conn *hcon) |
| 3683 | { |
| 3684 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 3685 | |
| 3686 | BT_DBG("hcon %p", hcon); |
| 3687 | |
| 3688 | if (hcon->type != ACL_LINK || !conn) |
| 3689 | return 0x13; |
| 3690 | |
| 3691 | return conn->disc_reason; |
| 3692 | } |
| 3693 | |
| 3694 | static int l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3695 | { |
| 3696 | BT_DBG("hcon %p reason %d", hcon, reason); |
| 3697 | |
| 3698 | if (hcon->type != ACL_LINK) |
| 3699 | return 0; |
| 3700 | |
| 3701 | l2cap_conn_del(hcon, bt_err(reason)); |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 3702 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3703 | return 0; |
| 3704 | } |
| 3705 | |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 3706 | static inline void l2cap_check_encryption(struct sock *sk, u8 encrypt) |
| 3707 | { |
Marcel Holtmann | 255c760 | 2009-02-04 21:07:19 +0100 | [diff] [blame] | 3708 | if (sk->sk_type != SOCK_SEQPACKET) |
| 3709 | return; |
| 3710 | |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 3711 | if (encrypt == 0x00) { |
| 3712 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) { |
| 3713 | l2cap_sock_clear_timer(sk); |
| 3714 | l2cap_sock_set_timer(sk, HZ * 5); |
| 3715 | } else if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH) |
| 3716 | __l2cap_sock_close(sk, ECONNREFUSED); |
| 3717 | } else { |
| 3718 | if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) |
| 3719 | l2cap_sock_clear_timer(sk); |
| 3720 | } |
| 3721 | } |
| 3722 | |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 3723 | 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] | 3724 | { |
| 3725 | struct l2cap_chan_list *l; |
Marcel Holtmann | 40be492 | 2008-07-14 20:13:50 +0200 | [diff] [blame] | 3726 | struct l2cap_conn *conn = hcon->l2cap_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3727 | struct sock *sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3728 | |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 3729 | if (!conn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3730 | return 0; |
Marcel Holtmann | 0139418 | 2006-07-03 10:02:46 +0200 | [diff] [blame] | 3731 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3732 | l = &conn->chan_list; |
| 3733 | |
| 3734 | BT_DBG("conn %p", conn); |
| 3735 | |
| 3736 | read_lock(&l->lock); |
| 3737 | |
| 3738 | for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) { |
| 3739 | bh_lock_sock(sk); |
| 3740 | |
Marcel Holtmann | 6a8d301 | 2009-02-06 23:56:36 +0100 | [diff] [blame] | 3741 | if (l2cap_pi(sk)->conf_state & L2CAP_CONF_CONNECT_PEND) { |
| 3742 | bh_unlock_sock(sk); |
| 3743 | continue; |
| 3744 | } |
| 3745 | |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 3746 | if (!status && (sk->sk_state == BT_CONNECTED || |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 3747 | sk->sk_state == BT_CONFIG)) { |
Marcel Holtmann | f62e432 | 2009-01-15 21:58:44 +0100 | [diff] [blame] | 3748 | l2cap_check_encryption(sk, encrypt); |
Marcel Holtmann | 9719f8a | 2008-07-14 20:13:45 +0200 | [diff] [blame] | 3749 | bh_unlock_sock(sk); |
| 3750 | continue; |
| 3751 | } |
| 3752 | |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 3753 | if (sk->sk_state == BT_CONNECT) { |
| 3754 | if (!status) { |
| 3755 | struct l2cap_conn_req req; |
| 3756 | req.scid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 3757 | req.psm = l2cap_pi(sk)->psm; |
| 3758 | |
| 3759 | l2cap_pi(sk)->ident = l2cap_get_ident(conn); |
| 3760 | |
| 3761 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
| 3762 | L2CAP_CONN_REQ, sizeof(req), &req); |
| 3763 | } else { |
| 3764 | l2cap_sock_clear_timer(sk); |
| 3765 | l2cap_sock_set_timer(sk, HZ / 10); |
| 3766 | } |
| 3767 | } else if (sk->sk_state == BT_CONNECT2) { |
| 3768 | struct l2cap_conn_rsp rsp; |
| 3769 | __u16 result; |
| 3770 | |
| 3771 | if (!status) { |
| 3772 | sk->sk_state = BT_CONFIG; |
| 3773 | result = L2CAP_CR_SUCCESS; |
| 3774 | } else { |
| 3775 | sk->sk_state = BT_DISCONN; |
| 3776 | l2cap_sock_set_timer(sk, HZ / 10); |
| 3777 | result = L2CAP_CR_SEC_BLOCK; |
| 3778 | } |
| 3779 | |
| 3780 | rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid); |
| 3781 | rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid); |
| 3782 | rsp.result = cpu_to_le16(result); |
Marcel Holtmann | e7c29cb | 2008-09-09 07:19:20 +0200 | [diff] [blame] | 3783 | rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 3784 | l2cap_send_cmd(conn, l2cap_pi(sk)->ident, |
| 3785 | L2CAP_CONN_RSP, sizeof(rsp), &rsp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3786 | } |
| 3787 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3788 | bh_unlock_sock(sk); |
| 3789 | } |
| 3790 | |
| 3791 | read_unlock(&l->lock); |
Marcel Holtmann | b1235d7 | 2008-07-14 20:13:54 +0200 | [diff] [blame] | 3792 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3793 | return 0; |
| 3794 | } |
| 3795 | |
| 3796 | static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) |
| 3797 | { |
| 3798 | struct l2cap_conn *conn = hcon->l2cap_data; |
| 3799 | |
| 3800 | if (!conn && !(conn = l2cap_conn_add(hcon, 0))) |
| 3801 | goto drop; |
| 3802 | |
| 3803 | BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags); |
| 3804 | |
| 3805 | if (flags & ACL_START) { |
| 3806 | struct l2cap_hdr *hdr; |
| 3807 | int len; |
| 3808 | |
| 3809 | if (conn->rx_len) { |
| 3810 | BT_ERR("Unexpected start frame (len %d)", skb->len); |
| 3811 | kfree_skb(conn->rx_skb); |
| 3812 | conn->rx_skb = NULL; |
| 3813 | conn->rx_len = 0; |
| 3814 | l2cap_conn_unreliable(conn, ECOMM); |
| 3815 | } |
| 3816 | |
| 3817 | if (skb->len < 2) { |
| 3818 | BT_ERR("Frame is too short (len %d)", skb->len); |
| 3819 | l2cap_conn_unreliable(conn, ECOMM); |
| 3820 | goto drop; |
| 3821 | } |
| 3822 | |
| 3823 | hdr = (struct l2cap_hdr *) skb->data; |
| 3824 | len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE; |
| 3825 | |
| 3826 | if (len == skb->len) { |
| 3827 | /* Complete frame received */ |
| 3828 | l2cap_recv_frame(conn, skb); |
| 3829 | return 0; |
| 3830 | } |
| 3831 | |
| 3832 | BT_DBG("Start: total len %d, frag len %d", len, skb->len); |
| 3833 | |
| 3834 | if (skb->len > len) { |
| 3835 | BT_ERR("Frame is too long (len %d, expected len %d)", |
| 3836 | skb->len, len); |
| 3837 | l2cap_conn_unreliable(conn, ECOMM); |
| 3838 | goto drop; |
| 3839 | } |
| 3840 | |
| 3841 | /* Allocate skb for the complete frame (with header) */ |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 3842 | conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC); |
| 3843 | if (!conn->rx_skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3844 | goto drop; |
| 3845 | |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 3846 | 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] | 3847 | skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3848 | conn->rx_len = len - skb->len; |
| 3849 | } else { |
| 3850 | BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len); |
| 3851 | |
| 3852 | if (!conn->rx_len) { |
| 3853 | BT_ERR("Unexpected continuation frame (len %d)", skb->len); |
| 3854 | l2cap_conn_unreliable(conn, ECOMM); |
| 3855 | goto drop; |
| 3856 | } |
| 3857 | |
| 3858 | if (skb->len > conn->rx_len) { |
| 3859 | BT_ERR("Fragment is too long (len %d, expected %d)", |
| 3860 | skb->len, conn->rx_len); |
| 3861 | kfree_skb(conn->rx_skb); |
| 3862 | conn->rx_skb = NULL; |
| 3863 | conn->rx_len = 0; |
| 3864 | l2cap_conn_unreliable(conn, ECOMM); |
| 3865 | goto drop; |
| 3866 | } |
| 3867 | |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 3868 | 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] | 3869 | skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3870 | conn->rx_len -= skb->len; |
| 3871 | |
| 3872 | if (!conn->rx_len) { |
| 3873 | /* Complete frame received */ |
| 3874 | l2cap_recv_frame(conn, conn->rx_skb); |
| 3875 | conn->rx_skb = NULL; |
| 3876 | } |
| 3877 | } |
| 3878 | |
| 3879 | drop: |
| 3880 | kfree_skb(skb); |
| 3881 | return 0; |
| 3882 | } |
| 3883 | |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 3884 | static ssize_t l2cap_sysfs_show(struct class *dev, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3885 | { |
| 3886 | struct sock *sk; |
| 3887 | struct hlist_node *node; |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 3888 | char *str = buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3889 | |
| 3890 | read_lock_bh(&l2cap_sk_list.lock); |
| 3891 | |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 3892 | sk_for_each(sk, node, &l2cap_sk_list.head) { |
| 3893 | struct l2cap_pinfo *pi = l2cap_pi(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3894 | |
Marcel Holtmann | 2af6b9d | 2009-01-15 21:58:38 +0100 | [diff] [blame] | 3895 | 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] | 3896 | batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst), |
Marcel Holtmann | b4324b5 | 2009-06-07 18:06:51 +0200 | [diff] [blame] | 3897 | sk->sk_state, __le16_to_cpu(pi->psm), pi->scid, |
| 3898 | pi->dcid, pi->imtu, pi->omtu, pi->sec_level); |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 3899 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3900 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3901 | read_unlock_bh(&l2cap_sk_list.lock); |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 3902 | |
Gustavo F. Padovan | af05b30 | 2009-04-20 01:31:08 -0300 | [diff] [blame] | 3903 | return str - buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3904 | } |
| 3905 | |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 3906 | static CLASS_ATTR(l2cap, S_IRUGO, l2cap_sysfs_show, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3907 | |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 3908 | static const struct proto_ops l2cap_sock_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3909 | .family = PF_BLUETOOTH, |
| 3910 | .owner = THIS_MODULE, |
| 3911 | .release = l2cap_sock_release, |
| 3912 | .bind = l2cap_sock_bind, |
| 3913 | .connect = l2cap_sock_connect, |
| 3914 | .listen = l2cap_sock_listen, |
| 3915 | .accept = l2cap_sock_accept, |
| 3916 | .getname = l2cap_sock_getname, |
| 3917 | .sendmsg = l2cap_sock_sendmsg, |
Marcel Holtmann | f66dc81 | 2009-01-15 21:57:00 +0100 | [diff] [blame] | 3918 | .recvmsg = l2cap_sock_recvmsg, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3919 | .poll = bt_sock_poll, |
Marcel Holtmann | 3241ad8 | 2008-07-14 20:13:50 +0200 | [diff] [blame] | 3920 | .ioctl = bt_sock_ioctl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3921 | .mmap = sock_no_mmap, |
| 3922 | .socketpair = sock_no_socketpair, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3923 | .shutdown = l2cap_sock_shutdown, |
| 3924 | .setsockopt = l2cap_sock_setsockopt, |
| 3925 | .getsockopt = l2cap_sock_getsockopt |
| 3926 | }; |
| 3927 | |
Stephen Hemminger | ec1b4cf | 2009-10-05 05:58:39 +0000 | [diff] [blame] | 3928 | static const struct net_proto_family l2cap_sock_family_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3929 | .family = PF_BLUETOOTH, |
| 3930 | .owner = THIS_MODULE, |
| 3931 | .create = l2cap_sock_create, |
| 3932 | }; |
| 3933 | |
| 3934 | static struct hci_proto l2cap_hci_proto = { |
| 3935 | .name = "L2CAP", |
| 3936 | .id = HCI_PROTO_L2CAP, |
| 3937 | .connect_ind = l2cap_connect_ind, |
| 3938 | .connect_cfm = l2cap_connect_cfm, |
| 3939 | .disconn_ind = l2cap_disconn_ind, |
Marcel Holtmann | 2950f21 | 2009-02-12 14:02:50 +0100 | [diff] [blame] | 3940 | .disconn_cfm = l2cap_disconn_cfm, |
Marcel Holtmann | 8c1b235 | 2009-01-15 21:58:04 +0100 | [diff] [blame] | 3941 | .security_cfm = l2cap_security_cfm, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3942 | .recv_acldata = l2cap_recv_acldata |
| 3943 | }; |
| 3944 | |
| 3945 | static int __init l2cap_init(void) |
| 3946 | { |
| 3947 | int err; |
Marcel Holtmann | be9d122 | 2005-11-08 09:57:38 -0800 | [diff] [blame] | 3948 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3949 | err = proto_register(&l2cap_proto, 0); |
| 3950 | if (err < 0) |
| 3951 | return err; |
| 3952 | |
| 3953 | err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); |
| 3954 | if (err < 0) { |
| 3955 | BT_ERR("L2CAP socket registration failed"); |
| 3956 | goto error; |
| 3957 | } |
| 3958 | |
| 3959 | err = hci_register_proto(&l2cap_hci_proto); |
| 3960 | if (err < 0) { |
| 3961 | BT_ERR("L2CAP protocol registration failed"); |
| 3962 | bt_sock_unregister(BTPROTO_L2CAP); |
| 3963 | goto error; |
| 3964 | } |
| 3965 | |
Marcel Holtmann | df5c37e | 2006-10-15 17:30:45 +0200 | [diff] [blame] | 3966 | if (class_create_file(bt_class, &class_attr_l2cap) < 0) |
| 3967 | BT_ERR("Failed to create L2CAP info file"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3968 | |
| 3969 | BT_INFO("L2CAP ver %s", VERSION); |
| 3970 | BT_INFO("L2CAP socket layer initialized"); |
| 3971 | |
| 3972 | return 0; |
| 3973 | |
| 3974 | error: |
| 3975 | proto_unregister(&l2cap_proto); |
| 3976 | return err; |
| 3977 | } |
| 3978 | |
| 3979 | static void __exit l2cap_exit(void) |
| 3980 | { |
Marcel Holtmann | a91f2e3 | 2006-07-03 10:02:41 +0200 | [diff] [blame] | 3981 | class_remove_file(bt_class, &class_attr_l2cap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3982 | |
| 3983 | if (bt_sock_unregister(BTPROTO_L2CAP) < 0) |
| 3984 | BT_ERR("L2CAP socket unregistration failed"); |
| 3985 | |
| 3986 | if (hci_unregister_proto(&l2cap_hci_proto) < 0) |
| 3987 | BT_ERR("L2CAP protocol unregistration failed"); |
| 3988 | |
| 3989 | proto_unregister(&l2cap_proto); |
| 3990 | } |
| 3991 | |
| 3992 | void l2cap_load(void) |
| 3993 | { |
| 3994 | /* Dummy function to trigger automatic L2CAP module loading by |
| 3995 | * other modules that use L2CAP sockets but don't use any other |
| 3996 | * symbols from it. */ |
| 3997 | return; |
| 3998 | } |
| 3999 | EXPORT_SYMBOL(l2cap_load); |
| 4000 | |
| 4001 | module_init(l2cap_init); |
| 4002 | module_exit(l2cap_exit); |
| 4003 | |
Marcel Holtmann | 44dd46d | 2009-05-02 19:09:01 -0700 | [diff] [blame] | 4004 | module_param(enable_ertm, bool, 0644); |
| 4005 | MODULE_PARM_DESC(enable_ertm, "Enable enhanced retransmission mode"); |
| 4006 | |
Marcel Holtmann | 63fbd24 | 2008-08-18 13:23:53 +0200 | [diff] [blame] | 4007 | MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4008 | MODULE_DESCRIPTION("Bluetooth L2CAP ver " VERSION); |
| 4009 | MODULE_VERSION(VERSION); |
| 4010 | MODULE_LICENSE("GPL"); |
| 4011 | MODULE_ALIAS("bt-proto-0"); |