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.
7 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License version 2 as
11 published by the Free Software Foundation;
13 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
14 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
16 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
17 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
18 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
19 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
20 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
23 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
24 SOFTWARE IS DISCLAIMED.
27 /* Bluetooth L2CAP sockets. */
29 #include <net/bluetooth/bluetooth.h>
30 #include <net/bluetooth/hci_core.h>
31 #include <net/bluetooth/l2cap.h>
33 /* ---- L2CAP timers ---- */
34 static void l2cap_sock_timeout(unsigned long arg)
36 struct sock *sk = (struct sock *) arg;
39 BT_DBG("sock %p state %d", sk, sk->sk_state);
43 if (sock_owned_by_user(sk)) {
44 /* sk is owned by user. Try again later */
45 l2cap_sock_set_timer(sk, HZ / 5);
51 if (sk->sk_state == BT_CONNECTED || sk->sk_state == BT_CONFIG)
52 reason = ECONNREFUSED;
53 else if (sk->sk_state == BT_CONNECT &&
54 l2cap_pi(sk)->sec_level != BT_SECURITY_SDP)
55 reason = ECONNREFUSED;
59 __l2cap_sock_close(sk, reason);
67 void l2cap_sock_set_timer(struct sock *sk, long timeout)
69 BT_DBG("sk %p state %d timeout %ld", sk, sk->sk_state, timeout);
70 sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout);
73 void l2cap_sock_clear_timer(struct sock *sk)
75 BT_DBG("sock %p state %d", sk, sk->sk_state);
76 sk_stop_timer(sk, &sk->sk_timer);
79 static struct sock *__l2cap_get_sock_by_addr(__le16 psm, bdaddr_t *src)
82 struct hlist_node *node;
83 sk_for_each(sk, node, &l2cap_sk_list.head)
84 if (l2cap_pi(sk)->sport == psm && !bacmp(&bt_sk(sk)->src, src))
91 static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen)
93 struct sock *sk = sock->sk;
94 struct sockaddr_l2 la;
99 if (!addr || addr->sa_family != AF_BLUETOOTH)
102 memset(&la, 0, sizeof(la));
103 len = min_t(unsigned int, sizeof(la), alen);
104 memcpy(&la, addr, len);
106 if (la.l2_cid && la.l2_psm)
111 if (sk->sk_state != BT_OPEN) {
117 __u16 psm = __le16_to_cpu(la.l2_psm);
119 /* PSM must be odd and lsb of upper byte must be 0 */
120 if ((psm & 0x0101) != 0x0001) {
125 /* Restrict usage of well-known PSMs */
126 if (psm < 0x1001 && !capable(CAP_NET_BIND_SERVICE)) {
132 write_lock_bh(&l2cap_sk_list.lock);
134 if (la.l2_psm && __l2cap_get_sock_by_addr(la.l2_psm, &la.l2_bdaddr)) {
137 /* Save source address */
138 bacpy(&bt_sk(sk)->src, &la.l2_bdaddr);
139 l2cap_pi(sk)->psm = la.l2_psm;
140 l2cap_pi(sk)->sport = la.l2_psm;
141 sk->sk_state = BT_BOUND;
143 if (__le16_to_cpu(la.l2_psm) == 0x0001 ||
144 __le16_to_cpu(la.l2_psm) == 0x0003)
145 l2cap_pi(sk)->sec_level = BT_SECURITY_SDP;
149 l2cap_pi(sk)->scid = la.l2_cid;
151 write_unlock_bh(&l2cap_sk_list.lock);
158 static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags)
160 struct sock *sk = sock->sk;
161 struct sockaddr_l2 la;
166 if (!addr || alen < sizeof(addr->sa_family) ||
167 addr->sa_family != AF_BLUETOOTH)
170 memset(&la, 0, sizeof(la));
171 len = min_t(unsigned int, sizeof(la), alen);
172 memcpy(&la, addr, len);
174 if (la.l2_cid && la.l2_psm)
179 if ((sk->sk_type == SOCK_SEQPACKET || sk->sk_type == SOCK_STREAM)
180 && !(la.l2_psm || la.l2_cid)) {
185 switch (l2cap_pi(sk)->mode) {
186 case L2CAP_MODE_BASIC:
188 case L2CAP_MODE_ERTM:
189 case L2CAP_MODE_STREAMING:
198 switch (sk->sk_state) {
202 /* Already connecting */
206 /* Already connected */
220 /* PSM must be odd and lsb of upper byte must be 0 */
221 if ((__le16_to_cpu(la.l2_psm) & 0x0101) != 0x0001 &&
222 sk->sk_type != SOCK_RAW && !la.l2_cid) {
227 /* Set destination address and psm */
228 bacpy(&bt_sk(sk)->dst, &la.l2_bdaddr);
229 l2cap_pi(sk)->psm = la.l2_psm;
230 l2cap_pi(sk)->dcid = la.l2_cid;
232 err = l2cap_chan_connect(l2cap_pi(sk)->chan);
237 err = bt_sock_wait_state(sk, BT_CONNECTED,
238 sock_sndtimeo(sk, flags & O_NONBLOCK));
244 static int l2cap_sock_listen(struct socket *sock, int backlog)
246 struct sock *sk = sock->sk;
249 BT_DBG("sk %p backlog %d", sk, backlog);
253 if ((sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM)
254 || sk->sk_state != BT_BOUND) {
259 switch (l2cap_pi(sk)->mode) {
260 case L2CAP_MODE_BASIC:
262 case L2CAP_MODE_ERTM:
263 case L2CAP_MODE_STREAMING:
272 if (!l2cap_pi(sk)->psm && !l2cap_pi(sk)->scid) {
273 bdaddr_t *src = &bt_sk(sk)->src;
278 write_lock_bh(&l2cap_sk_list.lock);
280 for (psm = 0x1001; psm < 0x1100; psm += 2)
281 if (!__l2cap_get_sock_by_addr(cpu_to_le16(psm), src)) {
282 l2cap_pi(sk)->psm = cpu_to_le16(psm);
283 l2cap_pi(sk)->sport = cpu_to_le16(psm);
288 write_unlock_bh(&l2cap_sk_list.lock);
294 sk->sk_max_ack_backlog = backlog;
295 sk->sk_ack_backlog = 0;
296 sk->sk_state = BT_LISTEN;
303 static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags)
305 DECLARE_WAITQUEUE(wait, current);
306 struct sock *sk = sock->sk, *nsk;
310 lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
312 if (sk->sk_state != BT_LISTEN) {
317 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
319 BT_DBG("sk %p timeo %ld", sk, timeo);
321 /* Wait for an incoming connection. (wake-one). */
322 add_wait_queue_exclusive(sk_sleep(sk), &wait);
323 while (!(nsk = bt_accept_dequeue(sk, newsock))) {
324 set_current_state(TASK_INTERRUPTIBLE);
331 timeo = schedule_timeout(timeo);
332 lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
334 if (sk->sk_state != BT_LISTEN) {
339 if (signal_pending(current)) {
340 err = sock_intr_errno(timeo);
344 set_current_state(TASK_RUNNING);
345 remove_wait_queue(sk_sleep(sk), &wait);
350 newsock->state = SS_CONNECTED;
352 BT_DBG("new socket %p", nsk);
359 static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer)
361 struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr;
362 struct sock *sk = sock->sk;
364 BT_DBG("sock %p, sk %p", sock, sk);
366 addr->sa_family = AF_BLUETOOTH;
367 *len = sizeof(struct sockaddr_l2);
370 la->l2_psm = l2cap_pi(sk)->psm;
371 bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst);
372 la->l2_cid = cpu_to_le16(l2cap_pi(sk)->dcid);
374 la->l2_psm = l2cap_pi(sk)->sport;
375 bacpy(&la->l2_bdaddr, &bt_sk(sk)->src);
376 la->l2_cid = cpu_to_le16(l2cap_pi(sk)->scid);
382 static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen)
384 struct sock *sk = sock->sk;
385 struct l2cap_options opts;
386 struct l2cap_conninfo cinfo;
392 if (get_user(len, optlen))
399 memset(&opts, 0, sizeof(opts));
400 opts.imtu = l2cap_pi(sk)->imtu;
401 opts.omtu = l2cap_pi(sk)->omtu;
402 opts.flush_to = l2cap_pi(sk)->flush_to;
403 opts.mode = l2cap_pi(sk)->mode;
404 opts.fcs = l2cap_pi(sk)->fcs;
405 opts.max_tx = l2cap_pi(sk)->max_tx;
406 opts.txwin_size = (__u16)l2cap_pi(sk)->tx_win;
408 len = min_t(unsigned int, len, sizeof(opts));
409 if (copy_to_user(optval, (char *) &opts, len))
415 switch (l2cap_pi(sk)->sec_level) {
416 case BT_SECURITY_LOW:
419 case BT_SECURITY_MEDIUM:
420 opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT;
422 case BT_SECURITY_HIGH:
423 opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT |
431 if (l2cap_pi(sk)->role_switch)
432 opt |= L2CAP_LM_MASTER;
434 if (l2cap_pi(sk)->force_reliable)
435 opt |= L2CAP_LM_RELIABLE;
437 if (put_user(opt, (u32 __user *) optval))
442 if (sk->sk_state != BT_CONNECTED &&
443 !(sk->sk_state == BT_CONNECT2 &&
444 bt_sk(sk)->defer_setup)) {
449 cinfo.hci_handle = l2cap_pi(sk)->conn->hcon->handle;
450 memcpy(cinfo.dev_class, l2cap_pi(sk)->conn->hcon->dev_class, 3);
452 len = min_t(unsigned int, len, sizeof(cinfo));
453 if (copy_to_user(optval, (char *) &cinfo, len))
467 static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen)
469 struct sock *sk = sock->sk;
470 struct bt_security sec;
475 if (level == SOL_L2CAP)
476 return l2cap_sock_getsockopt_old(sock, optname, optval, optlen);
478 if (level != SOL_BLUETOOTH)
481 if (get_user(len, optlen))
488 if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM
489 && sk->sk_type != SOCK_RAW) {
494 sec.level = l2cap_pi(sk)->sec_level;
496 len = min_t(unsigned int, len, sizeof(sec));
497 if (copy_to_user(optval, (char *) &sec, len))
503 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
508 if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval))
514 if (put_user(l2cap_pi(sk)->flushable, (u32 __user *) optval))
528 static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen)
530 struct sock *sk = sock->sk;
531 struct l2cap_chan *chan = l2cap_pi(sk)->chan;
532 struct l2cap_options opts;
542 if (sk->sk_state == BT_CONNECTED) {
547 opts.imtu = l2cap_pi(sk)->imtu;
548 opts.omtu = l2cap_pi(sk)->omtu;
549 opts.flush_to = l2cap_pi(sk)->flush_to;
550 opts.mode = l2cap_pi(sk)->mode;
551 opts.fcs = l2cap_pi(sk)->fcs;
552 opts.max_tx = l2cap_pi(sk)->max_tx;
553 opts.txwin_size = (__u16)l2cap_pi(sk)->tx_win;
555 len = min_t(unsigned int, sizeof(opts), optlen);
556 if (copy_from_user((char *) &opts, optval, len)) {
561 if (opts.txwin_size > L2CAP_DEFAULT_TX_WINDOW) {
566 l2cap_pi(sk)->mode = opts.mode;
567 switch (l2cap_pi(sk)->mode) {
568 case L2CAP_MODE_BASIC:
569 chan->conf_state &= ~L2CAP_CONF_STATE2_DEVICE;
571 case L2CAP_MODE_ERTM:
572 case L2CAP_MODE_STREAMING:
581 l2cap_pi(sk)->imtu = opts.imtu;
582 l2cap_pi(sk)->omtu = opts.omtu;
583 l2cap_pi(sk)->fcs = opts.fcs;
584 l2cap_pi(sk)->max_tx = opts.max_tx;
585 l2cap_pi(sk)->tx_win = (__u8)opts.txwin_size;
589 if (get_user(opt, (u32 __user *) optval)) {
594 if (opt & L2CAP_LM_AUTH)
595 l2cap_pi(sk)->sec_level = BT_SECURITY_LOW;
596 if (opt & L2CAP_LM_ENCRYPT)
597 l2cap_pi(sk)->sec_level = BT_SECURITY_MEDIUM;
598 if (opt & L2CAP_LM_SECURE)
599 l2cap_pi(sk)->sec_level = BT_SECURITY_HIGH;
601 l2cap_pi(sk)->role_switch = (opt & L2CAP_LM_MASTER);
602 l2cap_pi(sk)->force_reliable = (opt & L2CAP_LM_RELIABLE);
614 static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen)
616 struct sock *sk = sock->sk;
617 struct bt_security sec;
623 if (level == SOL_L2CAP)
624 return l2cap_sock_setsockopt_old(sock, optname, optval, optlen);
626 if (level != SOL_BLUETOOTH)
633 if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM
634 && sk->sk_type != SOCK_RAW) {
639 sec.level = BT_SECURITY_LOW;
641 len = min_t(unsigned int, sizeof(sec), optlen);
642 if (copy_from_user((char *) &sec, optval, len)) {
647 if (sec.level < BT_SECURITY_LOW ||
648 sec.level > BT_SECURITY_HIGH) {
653 l2cap_pi(sk)->sec_level = sec.level;
657 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
662 if (get_user(opt, (u32 __user *) optval)) {
667 bt_sk(sk)->defer_setup = opt;
671 if (get_user(opt, (u32 __user *) optval)) {
676 if (opt > BT_FLUSHABLE_ON) {
681 if (opt == BT_FLUSHABLE_OFF) {
682 struct l2cap_conn *conn = l2cap_pi(sk)->conn;
683 /* proceed futher only when we have l2cap_conn and
684 No Flush support in the LM */
685 if (!conn || !lmp_no_flush_capable(conn->hcon->hdev)) {
691 l2cap_pi(sk)->flushable = opt;
703 static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len)
705 struct sock *sk = sock->sk;
706 struct l2cap_pinfo *pi = l2cap_pi(sk);
711 BT_DBG("sock %p, sk %p", sock, sk);
713 err = sock_error(sk);
717 if (msg->msg_flags & MSG_OOB)
722 if (sk->sk_state != BT_CONNECTED) {
727 /* Connectionless channel */
728 if (sk->sk_type == SOCK_DGRAM) {
729 skb = l2cap_create_connless_pdu(sk, msg, len);
733 l2cap_do_send(sk, skb);
740 case L2CAP_MODE_BASIC:
741 /* Check outgoing MTU */
742 if (len > pi->omtu) {
747 /* Create a basic PDU */
748 skb = l2cap_create_basic_pdu(sk, msg, len);
754 l2cap_do_send(sk, skb);
758 case L2CAP_MODE_ERTM:
759 case L2CAP_MODE_STREAMING:
760 /* Entire SDU fits into one PDU */
761 if (len <= pi->chan->remote_mps) {
762 control = L2CAP_SDU_UNSEGMENTED;
763 skb = l2cap_create_iframe_pdu(sk, msg, len, control, 0);
768 __skb_queue_tail(&pi->chan->tx_q, skb);
770 if (pi->chan->tx_send_head == NULL)
771 pi->chan->tx_send_head = skb;
774 /* Segment SDU into multiples PDUs */
775 err = l2cap_sar_segment_sdu(pi->chan, msg, len);
780 if (pi->mode == L2CAP_MODE_STREAMING) {
781 l2cap_streaming_send(pi->chan);
786 if ((pi->chan->conn_state & L2CAP_CONN_REMOTE_BUSY) &&
787 (pi->chan->conn_state & L2CAP_CONN_WAIT_F)) {
791 err = l2cap_ertm_send(pi->chan);
798 BT_DBG("bad state %1.1x", pi->mode);
807 static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags)
809 struct sock *sk = sock->sk;
813 if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) {
814 __l2cap_connect_rsp_defer(sk);
821 if (sock->type == SOCK_STREAM)
822 return bt_sock_stream_recvmsg(iocb, sock, msg, len, flags);
824 return bt_sock_recvmsg(iocb, sock, msg, len, flags);
827 /* Kill socket (only if zapped and orphan)
828 * Must be called on unlocked socket.
830 void l2cap_sock_kill(struct sock *sk)
832 if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket)
835 BT_DBG("sk %p state %d", sk, sk->sk_state);
837 /* Kill poor orphan */
838 bt_sock_unlink(&l2cap_sk_list, sk);
839 sock_set_flag(sk, SOCK_DEAD);
843 /* Must be called on unlocked socket. */
844 static void l2cap_sock_close(struct sock *sk)
846 l2cap_sock_clear_timer(sk);
848 __l2cap_sock_close(sk, ECONNRESET);
853 static void l2cap_sock_cleanup_listen(struct sock *parent)
857 BT_DBG("parent %p", parent);
859 /* Close not yet accepted channels */
860 while ((sk = bt_accept_dequeue(parent, NULL)))
861 l2cap_sock_close(sk);
863 parent->sk_state = BT_CLOSED;
864 sock_set_flag(parent, SOCK_ZAPPED);
867 void __l2cap_sock_close(struct sock *sk, int reason)
869 struct l2cap_conn *conn = l2cap_pi(sk)->conn;
870 struct l2cap_chan *chan = l2cap_pi(sk)->chan;
872 BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket);
874 switch (sk->sk_state) {
876 l2cap_sock_cleanup_listen(sk);
881 if ((sk->sk_type == SOCK_SEQPACKET ||
882 sk->sk_type == SOCK_STREAM) &&
883 conn->hcon->type == ACL_LINK) {
884 l2cap_sock_set_timer(sk, sk->sk_sndtimeo);
885 l2cap_send_disconn_req(conn, chan, reason);
887 l2cap_chan_del(chan, reason);
891 if ((sk->sk_type == SOCK_SEQPACKET ||
892 sk->sk_type == SOCK_STREAM) &&
893 conn->hcon->type == ACL_LINK) {
894 struct l2cap_conn_rsp rsp;
897 if (bt_sk(sk)->defer_setup)
898 result = L2CAP_CR_SEC_BLOCK;
900 result = L2CAP_CR_BAD_PSM;
902 rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid);
903 rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid);
904 rsp.result = cpu_to_le16(result);
905 rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO);
906 l2cap_send_cmd(conn, chan->ident, L2CAP_CONN_RSP,
910 l2cap_chan_del(chan, reason);
915 l2cap_chan_del(chan, reason);
919 sock_set_flag(sk, SOCK_ZAPPED);
924 static int l2cap_sock_shutdown(struct socket *sock, int how)
926 struct sock *sk = sock->sk;
929 BT_DBG("sock %p, sk %p", sock, sk);
935 if (!sk->sk_shutdown) {
936 if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM)
937 err = __l2cap_wait_ack(sk);
939 sk->sk_shutdown = SHUTDOWN_MASK;
940 l2cap_sock_clear_timer(sk);
941 __l2cap_sock_close(sk, 0);
943 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime)
944 err = bt_sock_wait_state(sk, BT_CLOSED,
948 if (!err && sk->sk_err)
955 static int l2cap_sock_release(struct socket *sock)
957 struct sock *sk = sock->sk;
960 BT_DBG("sock %p, sk %p", sock, sk);
965 err = l2cap_sock_shutdown(sock, 2);
972 static void l2cap_sock_destruct(struct sock *sk)
976 skb_queue_purge(&sk->sk_receive_queue);
977 skb_queue_purge(&sk->sk_write_queue);
980 void l2cap_sock_init(struct sock *sk, struct sock *parent)
982 struct l2cap_pinfo *pi = l2cap_pi(sk);
983 struct l2cap_chan *chan = pi->chan;
988 struct l2cap_chan *pchan = l2cap_pi(parent)->chan;
990 sk->sk_type = parent->sk_type;
991 bt_sk(sk)->defer_setup = bt_sk(parent)->defer_setup;
993 pi->imtu = l2cap_pi(parent)->imtu;
994 pi->omtu = l2cap_pi(parent)->omtu;
995 chan->conf_state = pchan->conf_state;
996 pi->mode = l2cap_pi(parent)->mode;
997 pi->fcs = l2cap_pi(parent)->fcs;
998 pi->max_tx = l2cap_pi(parent)->max_tx;
999 pi->tx_win = l2cap_pi(parent)->tx_win;
1000 pi->sec_level = l2cap_pi(parent)->sec_level;
1001 pi->role_switch = l2cap_pi(parent)->role_switch;
1002 pi->force_reliable = l2cap_pi(parent)->force_reliable;
1003 pi->flushable = l2cap_pi(parent)->flushable;
1005 pi->imtu = L2CAP_DEFAULT_MTU;
1007 if (!disable_ertm && sk->sk_type == SOCK_STREAM) {
1008 pi->mode = L2CAP_MODE_ERTM;
1009 chan->conf_state |= L2CAP_CONF_STATE2_DEVICE;
1011 pi->mode = L2CAP_MODE_BASIC;
1013 pi->max_tx = L2CAP_DEFAULT_MAX_TX;
1014 pi->fcs = L2CAP_FCS_CRC16;
1015 pi->tx_win = L2CAP_DEFAULT_TX_WINDOW;
1016 pi->sec_level = BT_SECURITY_LOW;
1017 pi->role_switch = 0;
1018 pi->force_reliable = 0;
1019 pi->flushable = BT_FLUSHABLE_OFF;
1022 /* Default config options */
1023 pi->flush_to = L2CAP_DEFAULT_FLUSH_TO;
1026 static struct proto l2cap_proto = {
1028 .owner = THIS_MODULE,
1029 .obj_size = sizeof(struct l2cap_pinfo)
1032 struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio)
1036 sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto);
1040 sock_init_data(sock, sk);
1041 INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
1043 sk->sk_destruct = l2cap_sock_destruct;
1044 sk->sk_sndtimeo = msecs_to_jiffies(L2CAP_CONN_TIMEOUT);
1046 sock_reset_flag(sk, SOCK_ZAPPED);
1048 sk->sk_protocol = proto;
1049 sk->sk_state = BT_OPEN;
1051 setup_timer(&sk->sk_timer, l2cap_sock_timeout, (unsigned long) sk);
1053 bt_sock_link(&l2cap_sk_list, sk);
1057 static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol,
1061 struct l2cap_chan *chan;
1063 BT_DBG("sock %p", sock);
1065 sock->state = SS_UNCONNECTED;
1067 if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM &&
1068 sock->type != SOCK_DGRAM && sock->type != SOCK_RAW)
1069 return -ESOCKTNOSUPPORT;
1071 if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW))
1074 sock->ops = &l2cap_sock_ops;
1076 sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC);
1080 chan = l2cap_chan_alloc(sk);
1082 l2cap_sock_kill(sk);
1086 l2cap_pi(sk)->chan = chan;
1088 l2cap_sock_init(sk, NULL);
1092 const struct proto_ops l2cap_sock_ops = {
1093 .family = PF_BLUETOOTH,
1094 .owner = THIS_MODULE,
1095 .release = l2cap_sock_release,
1096 .bind = l2cap_sock_bind,
1097 .connect = l2cap_sock_connect,
1098 .listen = l2cap_sock_listen,
1099 .accept = l2cap_sock_accept,
1100 .getname = l2cap_sock_getname,
1101 .sendmsg = l2cap_sock_sendmsg,
1102 .recvmsg = l2cap_sock_recvmsg,
1103 .poll = bt_sock_poll,
1104 .ioctl = bt_sock_ioctl,
1105 .mmap = sock_no_mmap,
1106 .socketpair = sock_no_socketpair,
1107 .shutdown = l2cap_sock_shutdown,
1108 .setsockopt = l2cap_sock_setsockopt,
1109 .getsockopt = l2cap_sock_getsockopt
1112 static const struct net_proto_family l2cap_sock_family_ops = {
1113 .family = PF_BLUETOOTH,
1114 .owner = THIS_MODULE,
1115 .create = l2cap_sock_create,
1118 int __init l2cap_init_sockets(void)
1122 err = proto_register(&l2cap_proto, 0);
1126 err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops);
1130 BT_INFO("L2CAP socket layer initialized");
1135 BT_ERR("L2CAP socket registration failed");
1136 proto_unregister(&l2cap_proto);
1140 void l2cap_cleanup_sockets(void)
1142 if (bt_sock_unregister(BTPROTO_L2CAP) < 0)
1143 BT_ERR("L2CAP socket unregistration failed");
1145 proto_unregister(&l2cap_proto);