2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
4 Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org>
5 Copyright (C) 2010 Google Inc.
6 Copyright (C) 2011 ProFUSION Embedded Systems
8 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License version 2 as
12 published by the Free Software Foundation;
14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
15 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
17 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
18 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
19 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
20 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
21 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
23 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
24 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
25 SOFTWARE IS DISCLAIMED.
28 /* Bluetooth L2CAP sockets. */
30 #include <linux/security.h>
31 #include <linux/export.h>
33 #include <net/bluetooth/bluetooth.h>
34 #include <net/bluetooth/hci_core.h>
35 #include <net/bluetooth/l2cap.h>
36 #include <net/bluetooth/smp.h>
38 static const struct proto_ops l2cap_sock_ops;
39 static void l2cap_sock_init(struct sock *sk, struct sock *parent);
40 static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio);
42 static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen)
44 struct sock *sk = sock->sk;
45 struct l2cap_chan *chan = l2cap_pi(sk)->chan;
46 struct sockaddr_l2 la;
51 if (!addr || addr->sa_family != AF_BLUETOOTH)
54 memset(&la, 0, sizeof(la));
55 len = min_t(unsigned int, sizeof(la), alen);
56 memcpy(&la, addr, len);
58 if (la.l2_cid && la.l2_psm)
63 if (sk->sk_state != BT_OPEN) {
69 __u16 psm = __le16_to_cpu(la.l2_psm);
71 /* PSM must be odd and lsb of upper byte must be 0 */
72 if ((psm & 0x0101) != 0x0001) {
77 /* Restrict usage of well-known PSMs */
78 if (psm < 0x1001 && !capable(CAP_NET_BIND_SERVICE)) {
85 err = l2cap_add_scid(chan, la.l2_cid);
87 err = l2cap_add_psm(chan, &la.l2_bdaddr, la.l2_psm);
92 if (__le16_to_cpu(la.l2_psm) == 0x0001 ||
93 __le16_to_cpu(la.l2_psm) == 0x0003)
94 chan->sec_level = BT_SECURITY_SDP;
96 bacpy(&bt_sk(sk)->src, &la.l2_bdaddr);
98 chan->state = BT_BOUND;
99 sk->sk_state = BT_BOUND;
106 static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags)
108 struct sock *sk = sock->sk;
109 struct l2cap_chan *chan = l2cap_pi(sk)->chan;
110 struct sockaddr_l2 la;
115 if (!addr || alen < sizeof(addr->sa_family) ||
116 addr->sa_family != AF_BLUETOOTH)
119 memset(&la, 0, sizeof(la));
120 len = min_t(unsigned int, sizeof(la), alen);
121 memcpy(&la, addr, len);
123 if (la.l2_cid && la.l2_psm)
126 err = l2cap_chan_connect(chan, la.l2_psm, la.l2_cid, &la.l2_bdaddr);
130 err = bt_sock_wait_state(sk, BT_CONNECTED,
131 sock_sndtimeo(sk, flags & O_NONBLOCK));
133 if (sock_owned_by_user(sk))
138 static int l2cap_sock_listen(struct socket *sock, int backlog)
140 struct sock *sk = sock->sk;
141 struct l2cap_chan *chan = l2cap_pi(sk)->chan;
144 BT_DBG("sk %p backlog %d", sk, backlog);
148 if ((sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM)
149 || sk->sk_state != BT_BOUND) {
154 switch (chan->mode) {
155 case L2CAP_MODE_BASIC:
157 case L2CAP_MODE_ERTM:
158 case L2CAP_MODE_STREAMING:
167 sk->sk_max_ack_backlog = backlog;
168 sk->sk_ack_backlog = 0;
170 chan->state = BT_LISTEN;
171 sk->sk_state = BT_LISTEN;
178 static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags)
180 DECLARE_WAITQUEUE(wait, current);
181 struct sock *sk = sock->sk, *nsk;
185 lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
187 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
189 BT_DBG("sk %p timeo %ld", sk, timeo);
191 /* Wait for an incoming connection. (wake-one). */
192 add_wait_queue_exclusive(sk_sleep(sk), &wait);
194 set_current_state(TASK_INTERRUPTIBLE);
196 if (sk->sk_state != BT_LISTEN) {
201 nsk = bt_accept_dequeue(sk, newsock);
210 if (signal_pending(current)) {
211 err = sock_intr_errno(timeo);
216 timeo = schedule_timeout(timeo);
217 lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
219 __set_current_state(TASK_RUNNING);
220 remove_wait_queue(sk_sleep(sk), &wait);
225 newsock->state = SS_CONNECTED;
227 BT_DBG("new socket %p", nsk);
234 static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer)
236 struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr;
237 struct sock *sk = sock->sk;
238 struct l2cap_chan *chan = l2cap_pi(sk)->chan;
240 BT_DBG("sock %p, sk %p", sock, sk);
242 addr->sa_family = AF_BLUETOOTH;
243 *len = sizeof(struct sockaddr_l2);
246 la->l2_psm = chan->psm;
247 bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst);
248 la->l2_cid = cpu_to_le16(chan->dcid);
250 la->l2_psm = chan->sport;
251 bacpy(&la->l2_bdaddr, &bt_sk(sk)->src);
252 la->l2_cid = cpu_to_le16(chan->scid);
258 static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen)
260 struct sock *sk = sock->sk;
261 struct l2cap_chan *chan = l2cap_pi(sk)->chan;
262 struct l2cap_options opts;
263 struct l2cap_conninfo cinfo;
269 if (get_user(len, optlen))
276 memset(&opts, 0, sizeof(opts));
277 opts.imtu = chan->imtu;
278 opts.omtu = chan->omtu;
279 opts.flush_to = chan->flush_to;
280 opts.mode = chan->mode;
281 opts.fcs = chan->fcs;
282 opts.max_tx = chan->max_tx;
283 opts.txwin_size = chan->tx_win;
285 len = min_t(unsigned int, len, sizeof(opts));
286 if (copy_to_user(optval, (char *) &opts, len))
292 switch (chan->sec_level) {
293 case BT_SECURITY_LOW:
296 case BT_SECURITY_MEDIUM:
297 opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT;
299 case BT_SECURITY_HIGH:
300 opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT |
308 if (test_bit(FLAG_ROLE_SWITCH, &chan->flags))
309 opt |= L2CAP_LM_MASTER;
311 if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags))
312 opt |= L2CAP_LM_RELIABLE;
314 if (put_user(opt, (u32 __user *) optval))
319 if (sk->sk_state != BT_CONNECTED &&
320 !(sk->sk_state == BT_CONNECT2 &&
321 bt_sk(sk)->defer_setup)) {
326 memset(&cinfo, 0, sizeof(cinfo));
327 cinfo.hci_handle = chan->conn->hcon->handle;
328 memcpy(cinfo.dev_class, chan->conn->hcon->dev_class, 3);
330 len = min_t(unsigned int, len, sizeof(cinfo));
331 if (copy_to_user(optval, (char *) &cinfo, len))
345 static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen)
347 struct sock *sk = sock->sk;
348 struct l2cap_chan *chan = l2cap_pi(sk)->chan;
349 struct bt_security sec;
355 if (level == SOL_L2CAP)
356 return l2cap_sock_getsockopt_old(sock, optname, optval, optlen);
358 if (level != SOL_BLUETOOTH)
361 if (get_user(len, optlen))
368 if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED &&
369 chan->chan_type != L2CAP_CHAN_RAW) {
374 memset(&sec, 0, sizeof(sec));
375 sec.level = chan->sec_level;
377 if (sk->sk_state == BT_CONNECTED)
378 sec.key_size = chan->conn->hcon->enc_key_size;
380 len = min_t(unsigned int, len, sizeof(sec));
381 if (copy_to_user(optval, (char *) &sec, len))
387 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
392 if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval))
398 if (put_user(test_bit(FLAG_FLUSHABLE, &chan->flags),
399 (u32 __user *) optval))
405 if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM
406 && sk->sk_type != SOCK_RAW) {
411 pwr.force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags);
413 len = min_t(unsigned int, len, sizeof(pwr));
414 if (copy_to_user(optval, (char *) &pwr, len))
419 case BT_CHANNEL_POLICY:
425 if (put_user(chan->chan_policy, (u32 __user *) optval))
438 static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen)
440 struct sock *sk = sock->sk;
441 struct l2cap_chan *chan = l2cap_pi(sk)->chan;
442 struct l2cap_options opts;
452 if (sk->sk_state == BT_CONNECTED) {
457 opts.imtu = chan->imtu;
458 opts.omtu = chan->omtu;
459 opts.flush_to = chan->flush_to;
460 opts.mode = chan->mode;
461 opts.fcs = chan->fcs;
462 opts.max_tx = chan->max_tx;
463 opts.txwin_size = chan->tx_win;
465 len = min_t(unsigned int, sizeof(opts), optlen);
466 if (copy_from_user((char *) &opts, optval, len)) {
471 if (opts.txwin_size > L2CAP_DEFAULT_EXT_WINDOW) {
476 chan->mode = opts.mode;
477 switch (chan->mode) {
478 case L2CAP_MODE_BASIC:
479 clear_bit(CONF_STATE2_DEVICE, &chan->conf_state);
481 case L2CAP_MODE_ERTM:
482 case L2CAP_MODE_STREAMING:
491 chan->imtu = opts.imtu;
492 chan->omtu = opts.omtu;
493 chan->fcs = opts.fcs;
494 chan->max_tx = opts.max_tx;
495 chan->tx_win = opts.txwin_size;
499 if (get_user(opt, (u32 __user *) optval)) {
504 if (opt & L2CAP_LM_AUTH)
505 chan->sec_level = BT_SECURITY_LOW;
506 if (opt & L2CAP_LM_ENCRYPT)
507 chan->sec_level = BT_SECURITY_MEDIUM;
508 if (opt & L2CAP_LM_SECURE)
509 chan->sec_level = BT_SECURITY_HIGH;
511 if (opt & L2CAP_LM_MASTER)
512 set_bit(FLAG_ROLE_SWITCH, &chan->flags);
514 clear_bit(FLAG_ROLE_SWITCH, &chan->flags);
516 if (opt & L2CAP_LM_RELIABLE)
517 set_bit(FLAG_FORCE_RELIABLE, &chan->flags);
519 clear_bit(FLAG_FORCE_RELIABLE, &chan->flags);
531 static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen)
533 struct sock *sk = sock->sk;
534 struct l2cap_chan *chan = l2cap_pi(sk)->chan;
535 struct bt_security sec;
537 struct l2cap_conn *conn;
543 if (level == SOL_L2CAP)
544 return l2cap_sock_setsockopt_old(sock, optname, optval, optlen);
546 if (level != SOL_BLUETOOTH)
553 if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED &&
554 chan->chan_type != L2CAP_CHAN_RAW) {
559 sec.level = BT_SECURITY_LOW;
561 len = min_t(unsigned int, sizeof(sec), optlen);
562 if (copy_from_user((char *) &sec, optval, len)) {
567 if (sec.level < BT_SECURITY_LOW ||
568 sec.level > BT_SECURITY_HIGH) {
573 chan->sec_level = sec.level;
580 /*change security for LE channels */
581 if (chan->scid == L2CAP_CID_LE_DATA) {
582 if (!conn->hcon->out) {
587 if (smp_conn_security(conn, sec.level))
589 sk->sk_state = BT_CONFIG;
590 chan->state = BT_CONFIG;
592 /* or for ACL link, under defer_setup time */
593 } else if (sk->sk_state == BT_CONNECT2 &&
594 bt_sk(sk)->defer_setup) {
595 err = l2cap_chan_check_security(chan);
602 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
607 if (get_user(opt, (u32 __user *) optval)) {
612 bt_sk(sk)->defer_setup = opt;
616 if (get_user(opt, (u32 __user *) optval)) {
621 if (opt > BT_FLUSHABLE_ON) {
626 if (opt == BT_FLUSHABLE_OFF) {
627 struct l2cap_conn *conn = chan->conn;
628 /* proceed further only when we have l2cap_conn and
629 No Flush support in the LM */
630 if (!conn || !lmp_no_flush_capable(conn->hcon->hdev)) {
637 set_bit(FLAG_FLUSHABLE, &chan->flags);
639 clear_bit(FLAG_FLUSHABLE, &chan->flags);
643 if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED &&
644 chan->chan_type != L2CAP_CHAN_RAW) {
649 pwr.force_active = BT_POWER_FORCE_ACTIVE_ON;
651 len = min_t(unsigned int, sizeof(pwr), optlen);
652 if (copy_from_user((char *) &pwr, optval, len)) {
657 if (pwr.force_active)
658 set_bit(FLAG_FORCE_ACTIVE, &chan->flags);
660 clear_bit(FLAG_FORCE_ACTIVE, &chan->flags);
663 case BT_CHANNEL_POLICY:
669 if (get_user(opt, (u32 __user *) optval)) {
674 if (opt > BT_CHANNEL_POLICY_AMP_PREFERRED) {
679 if (chan->mode != L2CAP_MODE_ERTM &&
680 chan->mode != L2CAP_MODE_STREAMING) {
685 chan->chan_policy = (u8) opt;
697 static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len)
699 struct sock *sk = sock->sk;
700 struct l2cap_chan *chan = l2cap_pi(sk)->chan;
703 BT_DBG("sock %p, sk %p", sock, sk);
705 err = sock_error(sk);
709 if (msg->msg_flags & MSG_OOB)
714 if (sk->sk_state != BT_CONNECTED) {
719 err = l2cap_chan_send(chan, msg, len, sk->sk_priority);
725 static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags)
727 struct sock *sk = sock->sk;
728 struct l2cap_pinfo *pi = l2cap_pi(sk);
733 if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) {
734 sk->sk_state = BT_CONFIG;
735 pi->chan->state = BT_CONFIG;
737 __l2cap_connect_rsp_defer(pi->chan);
744 if (sock->type == SOCK_STREAM)
745 err = bt_sock_stream_recvmsg(iocb, sock, msg, len, flags);
747 err = bt_sock_recvmsg(iocb, sock, msg, len, flags);
749 if (pi->chan->mode != L2CAP_MODE_ERTM)
752 /* Attempt to put pending rx data in the socket buffer */
756 if (!test_bit(CONN_LOCAL_BUSY, &pi->chan->conn_state))
759 if (pi->rx_busy_skb) {
760 if (!sock_queue_rcv_skb(sk, pi->rx_busy_skb))
761 pi->rx_busy_skb = NULL;
766 /* Restore data flow when half of the receive buffer is
767 * available. This avoids resending large numbers of
770 if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf >> 1)
771 l2cap_chan_busy(pi->chan, 0);
778 /* Kill socket (only if zapped and orphan)
779 * Must be called on unlocked socket.
781 static void l2cap_sock_kill(struct sock *sk)
783 if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket)
786 BT_DBG("sk %p state %d", sk, sk->sk_state);
788 /* Kill poor orphan */
790 l2cap_chan_destroy(l2cap_pi(sk)->chan);
791 sock_set_flag(sk, SOCK_DEAD);
795 static int l2cap_sock_shutdown(struct socket *sock, int how)
797 struct sock *sk = sock->sk;
798 struct l2cap_chan *chan;
801 BT_DBG("sock %p, sk %p", sock, sk);
806 chan = l2cap_pi(sk)->chan;
809 if (!sk->sk_shutdown) {
810 if (chan->mode == L2CAP_MODE_ERTM)
811 err = __l2cap_wait_ack(sk);
813 sk->sk_shutdown = SHUTDOWN_MASK;
814 l2cap_chan_close(chan, 0);
816 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime)
817 err = bt_sock_wait_state(sk, BT_CLOSED,
821 if (!err && sk->sk_err)
828 static int l2cap_sock_release(struct socket *sock)
830 struct sock *sk = sock->sk;
833 BT_DBG("sock %p, sk %p", sock, sk);
838 err = l2cap_sock_shutdown(sock, 2);
845 static struct l2cap_chan *l2cap_sock_new_connection_cb(void *data)
847 struct sock *sk, *parent = data;
849 sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP,
854 bt_sock_reclassify_lock(sk, BTPROTO_L2CAP);
856 l2cap_sock_init(sk, parent);
858 return l2cap_pi(sk)->chan;
861 static int l2cap_sock_recv_cb(void *data, struct sk_buff *skb)
864 struct sock *sk = data;
865 struct l2cap_pinfo *pi = l2cap_pi(sk);
870 err = sock_queue_rcv_skb(sk, skb);
872 /* For ERTM, handle one skb that doesn't fit into the recv
873 * buffer. This is important to do because the data frames
874 * have already been acked, so the skb cannot be discarded.
876 * Notify the l2cap core that the buffer is full, so the
877 * LOCAL_BUSY state is entered and no more frames are
878 * acked and reassembled until there is buffer space
881 if (err < 0 && pi->chan->mode == L2CAP_MODE_ERTM) {
882 pi->rx_busy_skb = skb;
883 l2cap_chan_busy(pi->chan, 1);
890 static void l2cap_sock_close_cb(void *data)
892 struct sock *sk = data;
897 static void l2cap_sock_state_change_cb(void *data, int state)
899 struct sock *sk = data;
901 sk->sk_state = state;
904 static struct sk_buff *l2cap_sock_alloc_skb_cb(struct l2cap_chan *chan,
905 unsigned long len, int nb, int *err)
907 struct sock *sk = chan->sk;
909 return bt_skb_send_alloc(sk, len, nb, err);
912 static struct l2cap_ops l2cap_chan_ops = {
913 .name = "L2CAP Socket Interface",
914 .new_connection = l2cap_sock_new_connection_cb,
915 .recv = l2cap_sock_recv_cb,
916 .close = l2cap_sock_close_cb,
917 .state_change = l2cap_sock_state_change_cb,
918 .alloc_skb = l2cap_sock_alloc_skb_cb,
921 static void l2cap_sock_destruct(struct sock *sk)
925 if (l2cap_pi(sk)->rx_busy_skb) {
926 kfree_skb(l2cap_pi(sk)->rx_busy_skb);
927 l2cap_pi(sk)->rx_busy_skb = NULL;
930 skb_queue_purge(&sk->sk_receive_queue);
931 skb_queue_purge(&sk->sk_write_queue);
934 static void l2cap_sock_init(struct sock *sk, struct sock *parent)
936 struct l2cap_pinfo *pi = l2cap_pi(sk);
937 struct l2cap_chan *chan = pi->chan;
942 struct l2cap_chan *pchan = l2cap_pi(parent)->chan;
944 sk->sk_type = parent->sk_type;
945 bt_sk(sk)->defer_setup = bt_sk(parent)->defer_setup;
947 chan->chan_type = pchan->chan_type;
948 chan->imtu = pchan->imtu;
949 chan->omtu = pchan->omtu;
950 chan->conf_state = pchan->conf_state;
951 chan->mode = pchan->mode;
952 chan->fcs = pchan->fcs;
953 chan->max_tx = pchan->max_tx;
954 chan->tx_win = pchan->tx_win;
955 chan->tx_win_max = pchan->tx_win_max;
956 chan->sec_level = pchan->sec_level;
957 chan->flags = pchan->flags;
959 security_sk_clone(parent, sk);
962 switch (sk->sk_type) {
964 chan->chan_type = L2CAP_CHAN_RAW;
967 chan->chan_type = L2CAP_CHAN_CONN_LESS;
971 chan->chan_type = L2CAP_CHAN_CONN_ORIENTED;
975 chan->imtu = L2CAP_DEFAULT_MTU;
977 if (!disable_ertm && sk->sk_type == SOCK_STREAM) {
978 chan->mode = L2CAP_MODE_ERTM;
979 set_bit(CONF_STATE2_DEVICE, &chan->conf_state);
981 chan->mode = L2CAP_MODE_BASIC;
983 chan->max_tx = L2CAP_DEFAULT_MAX_TX;
984 chan->fcs = L2CAP_FCS_CRC16;
985 chan->tx_win = L2CAP_DEFAULT_TX_WINDOW;
986 chan->tx_win_max = L2CAP_DEFAULT_TX_WINDOW;
987 chan->sec_level = BT_SECURITY_LOW;
989 set_bit(FLAG_FORCE_ACTIVE, &chan->flags);
992 /* Default config options */
993 chan->flush_to = L2CAP_DEFAULT_FLUSH_TO;
996 chan->ops = &l2cap_chan_ops;
999 static struct proto l2cap_proto = {
1001 .owner = THIS_MODULE,
1002 .obj_size = sizeof(struct l2cap_pinfo)
1005 static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio)
1008 struct l2cap_chan *chan;
1010 sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto);
1014 sock_init_data(sock, sk);
1015 INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
1017 sk->sk_destruct = l2cap_sock_destruct;
1018 sk->sk_sndtimeo = msecs_to_jiffies(L2CAP_CONN_TIMEOUT);
1020 sock_reset_flag(sk, SOCK_ZAPPED);
1022 sk->sk_protocol = proto;
1023 sk->sk_state = BT_OPEN;
1025 chan = l2cap_chan_create(sk);
1027 l2cap_sock_kill(sk);
1031 l2cap_pi(sk)->chan = chan;
1036 static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol,
1041 BT_DBG("sock %p", sock);
1043 sock->state = SS_UNCONNECTED;
1045 if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM &&
1046 sock->type != SOCK_DGRAM && sock->type != SOCK_RAW)
1047 return -ESOCKTNOSUPPORT;
1049 if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW))
1052 sock->ops = &l2cap_sock_ops;
1054 sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC);
1058 l2cap_sock_init(sk, NULL);
1062 static const struct proto_ops l2cap_sock_ops = {
1063 .family = PF_BLUETOOTH,
1064 .owner = THIS_MODULE,
1065 .release = l2cap_sock_release,
1066 .bind = l2cap_sock_bind,
1067 .connect = l2cap_sock_connect,
1068 .listen = l2cap_sock_listen,
1069 .accept = l2cap_sock_accept,
1070 .getname = l2cap_sock_getname,
1071 .sendmsg = l2cap_sock_sendmsg,
1072 .recvmsg = l2cap_sock_recvmsg,
1073 .poll = bt_sock_poll,
1074 .ioctl = bt_sock_ioctl,
1075 .mmap = sock_no_mmap,
1076 .socketpair = sock_no_socketpair,
1077 .shutdown = l2cap_sock_shutdown,
1078 .setsockopt = l2cap_sock_setsockopt,
1079 .getsockopt = l2cap_sock_getsockopt
1082 static const struct net_proto_family l2cap_sock_family_ops = {
1083 .family = PF_BLUETOOTH,
1084 .owner = THIS_MODULE,
1085 .create = l2cap_sock_create,
1088 int __init l2cap_init_sockets(void)
1092 err = proto_register(&l2cap_proto, 0);
1096 err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops);
1100 BT_INFO("L2CAP socket layer initialized");
1105 BT_ERR("L2CAP socket registration failed");
1106 proto_unregister(&l2cap_proto);
1110 void l2cap_cleanup_sockets(void)
1112 if (bt_sock_unregister(BTPROTO_L2CAP) < 0)
1113 BT_ERR("L2CAP socket unregistration failed");
1115 proto_unregister(&l2cap_proto);