2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
5 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
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;
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
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
18 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
21 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
22 SOFTWARE IS DISCLAIMED.
25 /* Bluetooth L2CAP core and sockets. */
27 #include <linux/module.h>
29 #include <linux/types.h>
30 #include <linux/capability.h>
31 #include <linux/errno.h>
32 #include <linux/kernel.h>
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>
41 #include <linux/list.h>
42 #include <linux/device.h>
43 #include <linux/uaccess.h>
44 #include <linux/crc16.h>
47 #include <asm/system.h>
48 #include <asm/unaligned.h>
50 #include <net/bluetooth/bluetooth.h>
51 #include <net/bluetooth/hci_core.h>
52 #include <net/bluetooth/l2cap.h>
54 #define VERSION "2.14"
56 static int enable_ertm
= 0;
58 static u32 l2cap_feat_mask
= L2CAP_FEAT_FIXED_CHAN
;
59 static u8 l2cap_fixed_chan
[8] = { 0x02, };
61 static const struct proto_ops l2cap_sock_ops
;
63 static struct bt_sock_list l2cap_sk_list
= {
64 .lock
= __RW_LOCK_UNLOCKED(l2cap_sk_list
.lock
)
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
);
71 static struct sk_buff
*l2cap_build_cmd(struct l2cap_conn
*conn
,
72 u8 code
, u8 ident
, u16 dlen
, void *data
);
74 /* ---- L2CAP timers ---- */
75 static void l2cap_sock_timeout(unsigned long arg
)
77 struct sock
*sk
= (struct sock
*) arg
;
80 BT_DBG("sock %p state %d", sk
, sk
->sk_state
);
84 if (sk
->sk_state
== BT_CONNECTED
|| sk
->sk_state
== BT_CONFIG
)
85 reason
= ECONNREFUSED
;
86 else if (sk
->sk_state
== BT_CONNECT
&&
87 l2cap_pi(sk
)->sec_level
!= BT_SECURITY_SDP
)
88 reason
= ECONNREFUSED
;
92 __l2cap_sock_close(sk
, reason
);
100 static void l2cap_sock_set_timer(struct sock
*sk
, long timeout
)
102 BT_DBG("sk %p state %d timeout %ld", sk
, sk
->sk_state
, timeout
);
103 sk_reset_timer(sk
, &sk
->sk_timer
, jiffies
+ timeout
);
106 static void l2cap_sock_clear_timer(struct sock
*sk
)
108 BT_DBG("sock %p state %d", sk
, sk
->sk_state
);
109 sk_stop_timer(sk
, &sk
->sk_timer
);
112 /* ---- L2CAP channels ---- */
113 static struct sock
*__l2cap_get_chan_by_dcid(struct l2cap_chan_list
*l
, u16 cid
)
116 for (s
= l
->head
; s
; s
= l2cap_pi(s
)->next_c
) {
117 if (l2cap_pi(s
)->dcid
== cid
)
123 static struct sock
*__l2cap_get_chan_by_scid(struct l2cap_chan_list
*l
, u16 cid
)
126 for (s
= l
->head
; s
; s
= l2cap_pi(s
)->next_c
) {
127 if (l2cap_pi(s
)->scid
== cid
)
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
)
139 s
= __l2cap_get_chan_by_scid(l
, cid
);
142 read_unlock(&l
->lock
);
146 static struct sock
*__l2cap_get_chan_by_ident(struct l2cap_chan_list
*l
, u8 ident
)
149 for (s
= l
->head
; s
; s
= l2cap_pi(s
)->next_c
) {
150 if (l2cap_pi(s
)->ident
== ident
)
156 static inline struct sock
*l2cap_get_chan_by_ident(struct l2cap_chan_list
*l
, u8 ident
)
160 s
= __l2cap_get_chan_by_ident(l
, ident
);
163 read_unlock(&l
->lock
);
167 static u16
l2cap_alloc_cid(struct l2cap_chan_list
*l
)
169 u16 cid
= L2CAP_CID_DYN_START
;
171 for (; cid
< L2CAP_CID_DYN_END
; cid
++) {
172 if (!__l2cap_get_chan_by_scid(l
, cid
))
179 static inline void __l2cap_chan_link(struct l2cap_chan_list
*l
, struct sock
*sk
)
184 l2cap_pi(l
->head
)->prev_c
= sk
;
186 l2cap_pi(sk
)->next_c
= l
->head
;
187 l2cap_pi(sk
)->prev_c
= NULL
;
191 static inline void l2cap_chan_unlink(struct l2cap_chan_list
*l
, struct sock
*sk
)
193 struct sock
*next
= l2cap_pi(sk
)->next_c
, *prev
= l2cap_pi(sk
)->prev_c
;
195 write_lock_bh(&l
->lock
);
200 l2cap_pi(next
)->prev_c
= prev
;
202 l2cap_pi(prev
)->next_c
= next
;
203 write_unlock_bh(&l
->lock
);
208 static void __l2cap_chan_add(struct l2cap_conn
*conn
, struct sock
*sk
, struct sock
*parent
)
210 struct l2cap_chan_list
*l
= &conn
->chan_list
;
212 BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn
,
213 l2cap_pi(sk
)->psm
, l2cap_pi(sk
)->dcid
);
215 conn
->disc_reason
= 0x13;
217 l2cap_pi(sk
)->conn
= conn
;
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 */
224 l2cap_pi(sk
)->scid
= L2CAP_CID_CONN_LESS
;
225 l2cap_pi(sk
)->dcid
= L2CAP_CID_CONN_LESS
;
226 l2cap_pi(sk
)->omtu
= L2CAP_DEFAULT_MTU
;
228 /* Raw socket can send/recv signalling messages only */
229 l2cap_pi(sk
)->scid
= L2CAP_CID_SIGNALING
;
230 l2cap_pi(sk
)->dcid
= L2CAP_CID_SIGNALING
;
231 l2cap_pi(sk
)->omtu
= L2CAP_DEFAULT_MTU
;
234 __l2cap_chan_link(l
, sk
);
237 bt_accept_enqueue(parent
, sk
);
241 * Must be called on the locked socket. */
242 static void l2cap_chan_del(struct sock
*sk
, int err
)
244 struct l2cap_conn
*conn
= l2cap_pi(sk
)->conn
;
245 struct sock
*parent
= bt_sk(sk
)->parent
;
247 l2cap_sock_clear_timer(sk
);
249 BT_DBG("sk %p, conn %p, err %d", sk
, conn
, err
);
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
);
258 sk
->sk_state
= BT_CLOSED
;
259 sock_set_flag(sk
, SOCK_ZAPPED
);
265 bt_accept_unlink(sk
);
266 parent
->sk_data_ready(parent
, 0);
268 sk
->sk_state_change(sk
);
271 /* Service level security */
272 static inline int l2cap_check_security(struct sock
*sk
)
274 struct l2cap_conn
*conn
= l2cap_pi(sk
)->conn
;
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
;
281 auth_type
= HCI_AT_NO_BONDING
;
283 if (l2cap_pi(sk
)->sec_level
== BT_SECURITY_LOW
)
284 l2cap_pi(sk
)->sec_level
= BT_SECURITY_SDP
;
286 switch (l2cap_pi(sk
)->sec_level
) {
287 case BT_SECURITY_HIGH
:
288 auth_type
= HCI_AT_GENERAL_BONDING_MITM
;
290 case BT_SECURITY_MEDIUM
:
291 auth_type
= HCI_AT_GENERAL_BONDING
;
294 auth_type
= HCI_AT_NO_BONDING
;
299 return hci_conn_security(conn
->hcon
, l2cap_pi(sk
)->sec_level
,
303 static inline u8
l2cap_get_ident(struct l2cap_conn
*conn
)
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.
313 spin_lock_bh(&conn
->lock
);
315 if (++conn
->tx_ident
> 128)
320 spin_unlock_bh(&conn
->lock
);
325 static inline int l2cap_send_cmd(struct l2cap_conn
*conn
, u8 ident
, u8 code
, u16 len
, void *data
)
327 struct sk_buff
*skb
= l2cap_build_cmd(conn
, code
, ident
, len
, data
);
329 BT_DBG("code 0x%2.2x", code
);
334 return hci_send_acl(conn
->hcon
, skb
, 0);
337 static inline int l2cap_send_sframe(struct l2cap_pinfo
*pi
, u16 control
)
340 struct l2cap_hdr
*lh
;
341 struct l2cap_conn
*conn
= pi
->conn
;
342 int count
, hlen
= L2CAP_HDR_SIZE
+ 2;
344 if (pi
->fcs
== L2CAP_FCS_CRC16
)
347 BT_DBG("pi %p, control 0x%2.2x", pi
, control
);
349 count
= min_t(unsigned int, conn
->mtu
, hlen
);
350 control
|= L2CAP_CTRL_FRAME_TYPE
;
352 skb
= bt_skb_alloc(count
, GFP_ATOMIC
);
356 lh
= (struct l2cap_hdr
*) skb_put(skb
, L2CAP_HDR_SIZE
);
357 lh
->len
= cpu_to_le16(hlen
- L2CAP_HDR_SIZE
);
358 lh
->cid
= cpu_to_le16(pi
->dcid
);
359 put_unaligned_le16(control
, skb_put(skb
, 2));
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));
366 return hci_send_acl(pi
->conn
->hcon
, skb
, 0);
369 static inline int l2cap_send_rr_or_rnr(struct l2cap_pinfo
*pi
, u16 control
)
371 if (pi
->conn_state
& L2CAP_CONN_LOCAL_BUSY
)
372 control
|= L2CAP_SUPER_RCV_NOT_READY
;
374 control
|= L2CAP_SUPER_RCV_READY
;
376 return l2cap_send_sframe(pi
, control
);
379 static void l2cap_do_start(struct sock
*sk
)
381 struct l2cap_conn
*conn
= l2cap_pi(sk
)->conn
;
383 if (conn
->info_state
& L2CAP_INFO_FEAT_MASK_REQ_SENT
) {
384 if (!(conn
->info_state
& L2CAP_INFO_FEAT_MASK_REQ_DONE
))
387 if (l2cap_check_security(sk
)) {
388 struct l2cap_conn_req req
;
389 req
.scid
= cpu_to_le16(l2cap_pi(sk
)->scid
);
390 req
.psm
= l2cap_pi(sk
)->psm
;
392 l2cap_pi(sk
)->ident
= l2cap_get_ident(conn
);
394 l2cap_send_cmd(conn
, l2cap_pi(sk
)->ident
,
395 L2CAP_CONN_REQ
, sizeof(req
), &req
);
398 struct l2cap_info_req req
;
399 req
.type
= cpu_to_le16(L2CAP_IT_FEAT_MASK
);
401 conn
->info_state
|= L2CAP_INFO_FEAT_MASK_REQ_SENT
;
402 conn
->info_ident
= l2cap_get_ident(conn
);
404 mod_timer(&conn
->info_timer
, jiffies
+
405 msecs_to_jiffies(L2CAP_INFO_TIMEOUT
));
407 l2cap_send_cmd(conn
, conn
->info_ident
,
408 L2CAP_INFO_REQ
, sizeof(req
), &req
);
412 static void l2cap_send_disconn_req(struct l2cap_conn
*conn
, struct sock
*sk
)
414 struct l2cap_disconn_req req
;
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
);
422 /* ---- L2CAP connections ---- */
423 static void l2cap_conn_start(struct l2cap_conn
*conn
)
425 struct l2cap_chan_list
*l
= &conn
->chan_list
;
428 BT_DBG("conn %p", conn
);
432 for (sk
= l
->head
; sk
; sk
= l2cap_pi(sk
)->next_c
) {
435 if (sk
->sk_type
!= SOCK_SEQPACKET
) {
440 if (sk
->sk_state
== BT_CONNECT
) {
441 if (l2cap_check_security(sk
)) {
442 struct l2cap_conn_req req
;
443 req
.scid
= cpu_to_le16(l2cap_pi(sk
)->scid
);
444 req
.psm
= l2cap_pi(sk
)->psm
;
446 l2cap_pi(sk
)->ident
= l2cap_get_ident(conn
);
448 l2cap_send_cmd(conn
, l2cap_pi(sk
)->ident
,
449 L2CAP_CONN_REQ
, sizeof(req
), &req
);
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
);
456 if (l2cap_check_security(sk
)) {
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);
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
);
469 rsp
.result
= cpu_to_le16(L2CAP_CR_PEND
);
470 rsp
.status
= cpu_to_le16(L2CAP_CS_AUTHEN_PEND
);
473 l2cap_send_cmd(conn
, l2cap_pi(sk
)->ident
,
474 L2CAP_CONN_RSP
, sizeof(rsp
), &rsp
);
480 read_unlock(&l
->lock
);
483 static void l2cap_conn_ready(struct l2cap_conn
*conn
)
485 struct l2cap_chan_list
*l
= &conn
->chan_list
;
488 BT_DBG("conn %p", conn
);
492 for (sk
= l
->head
; sk
; sk
= l2cap_pi(sk
)->next_c
) {
495 if (sk
->sk_type
!= SOCK_SEQPACKET
) {
496 l2cap_sock_clear_timer(sk
);
497 sk
->sk_state
= BT_CONNECTED
;
498 sk
->sk_state_change(sk
);
499 } else if (sk
->sk_state
== BT_CONNECT
)
505 read_unlock(&l
->lock
);
508 /* Notify sockets that we cannot guaranty reliability anymore */
509 static void l2cap_conn_unreliable(struct l2cap_conn
*conn
, int err
)
511 struct l2cap_chan_list
*l
= &conn
->chan_list
;
514 BT_DBG("conn %p", conn
);
518 for (sk
= l
->head
; sk
; sk
= l2cap_pi(sk
)->next_c
) {
519 if (l2cap_pi(sk
)->force_reliable
)
523 read_unlock(&l
->lock
);
526 static void l2cap_info_timeout(unsigned long arg
)
528 struct l2cap_conn
*conn
= (void *) arg
;
530 conn
->info_state
|= L2CAP_INFO_FEAT_MASK_REQ_DONE
;
531 conn
->info_ident
= 0;
533 l2cap_conn_start(conn
);
536 static struct l2cap_conn
*l2cap_conn_add(struct hci_conn
*hcon
, u8 status
)
538 struct l2cap_conn
*conn
= hcon
->l2cap_data
;
543 conn
= kzalloc(sizeof(struct l2cap_conn
), GFP_ATOMIC
);
547 hcon
->l2cap_data
= conn
;
550 BT_DBG("hcon %p conn %p", hcon
, conn
);
552 conn
->mtu
= hcon
->hdev
->acl_mtu
;
553 conn
->src
= &hcon
->hdev
->bdaddr
;
554 conn
->dst
= &hcon
->dst
;
558 spin_lock_init(&conn
->lock
);
559 rwlock_init(&conn
->chan_list
.lock
);
561 setup_timer(&conn
->info_timer
, l2cap_info_timeout
,
562 (unsigned long) conn
);
564 conn
->disc_reason
= 0x13;
569 static void l2cap_conn_del(struct hci_conn
*hcon
, int err
)
571 struct l2cap_conn
*conn
= hcon
->l2cap_data
;
577 BT_DBG("hcon %p conn %p, err %d", hcon
, conn
, err
);
579 kfree_skb(conn
->rx_skb
);
582 while ((sk
= conn
->chan_list
.head
)) {
584 l2cap_chan_del(sk
, err
);
589 if (conn
->info_state
& L2CAP_INFO_FEAT_MASK_REQ_SENT
)
590 del_timer_sync(&conn
->info_timer
);
592 hcon
->l2cap_data
= NULL
;
596 static inline void l2cap_chan_add(struct l2cap_conn
*conn
, struct sock
*sk
, struct sock
*parent
)
598 struct l2cap_chan_list
*l
= &conn
->chan_list
;
599 write_lock_bh(&l
->lock
);
600 __l2cap_chan_add(conn
, sk
, parent
);
601 write_unlock_bh(&l
->lock
);
604 /* ---- Socket interface ---- */
605 static struct sock
*__l2cap_get_sock_by_addr(__le16 psm
, bdaddr_t
*src
)
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
))
617 /* Find socket with psm and source bdaddr.
618 * Returns closest match.
620 static struct sock
*__l2cap_get_sock_by_psm(int state
, __le16 psm
, bdaddr_t
*src
)
622 struct sock
*sk
= NULL
, *sk1
= NULL
;
623 struct hlist_node
*node
;
625 sk_for_each(sk
, node
, &l2cap_sk_list
.head
) {
626 if (state
&& sk
->sk_state
!= state
)
629 if (l2cap_pi(sk
)->psm
== psm
) {
631 if (!bacmp(&bt_sk(sk
)->src
, src
))
635 if (!bacmp(&bt_sk(sk
)->src
, BDADDR_ANY
))
639 return node
? sk
: sk1
;
642 /* Find socket with given address (psm, src).
643 * Returns locked socket */
644 static inline struct sock
*l2cap_get_sock_by_psm(int state
, __le16 psm
, bdaddr_t
*src
)
647 read_lock(&l2cap_sk_list
.lock
);
648 s
= __l2cap_get_sock_by_psm(state
, psm
, src
);
651 read_unlock(&l2cap_sk_list
.lock
);
655 static void l2cap_sock_destruct(struct sock
*sk
)
659 skb_queue_purge(&sk
->sk_receive_queue
);
660 skb_queue_purge(&sk
->sk_write_queue
);
663 static void l2cap_sock_cleanup_listen(struct sock
*parent
)
667 BT_DBG("parent %p", parent
);
669 /* Close not yet accepted channels */
670 while ((sk
= bt_accept_dequeue(parent
, NULL
)))
671 l2cap_sock_close(sk
);
673 parent
->sk_state
= BT_CLOSED
;
674 sock_set_flag(parent
, SOCK_ZAPPED
);
677 /* Kill socket (only if zapped and orphan)
678 * Must be called on unlocked socket.
680 static void l2cap_sock_kill(struct sock
*sk
)
682 if (!sock_flag(sk
, SOCK_ZAPPED
) || sk
->sk_socket
)
685 BT_DBG("sk %p state %d", sk
, sk
->sk_state
);
687 /* Kill poor orphan */
688 bt_sock_unlink(&l2cap_sk_list
, sk
);
689 sock_set_flag(sk
, SOCK_DEAD
);
693 static void __l2cap_sock_close(struct sock
*sk
, int reason
)
695 BT_DBG("sk %p state %d socket %p", sk
, sk
->sk_state
, sk
->sk_socket
);
697 switch (sk
->sk_state
) {
699 l2cap_sock_cleanup_listen(sk
);
704 if (sk
->sk_type
== SOCK_SEQPACKET
) {
705 struct l2cap_conn
*conn
= l2cap_pi(sk
)->conn
;
707 sk
->sk_state
= BT_DISCONN
;
708 l2cap_sock_set_timer(sk
, sk
->sk_sndtimeo
);
709 l2cap_send_disconn_req(conn
, sk
);
711 l2cap_chan_del(sk
, reason
);
715 if (sk
->sk_type
== SOCK_SEQPACKET
) {
716 struct l2cap_conn
*conn
= l2cap_pi(sk
)->conn
;
717 struct l2cap_conn_rsp rsp
;
720 if (bt_sk(sk
)->defer_setup
)
721 result
= L2CAP_CR_SEC_BLOCK
;
723 result
= L2CAP_CR_BAD_PSM
;
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
);
732 l2cap_chan_del(sk
, reason
);
737 l2cap_chan_del(sk
, reason
);
741 sock_set_flag(sk
, SOCK_ZAPPED
);
746 /* Must be called on unlocked socket. */
747 static void l2cap_sock_close(struct sock
*sk
)
749 l2cap_sock_clear_timer(sk
);
751 __l2cap_sock_close(sk
, ECONNRESET
);
756 static void l2cap_sock_init(struct sock
*sk
, struct sock
*parent
)
758 struct l2cap_pinfo
*pi
= l2cap_pi(sk
);
763 sk
->sk_type
= parent
->sk_type
;
764 bt_sk(sk
)->defer_setup
= bt_sk(parent
)->defer_setup
;
766 pi
->imtu
= l2cap_pi(parent
)->imtu
;
767 pi
->omtu
= l2cap_pi(parent
)->omtu
;
768 pi
->mode
= l2cap_pi(parent
)->mode
;
769 pi
->fcs
= l2cap_pi(parent
)->fcs
;
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
;
774 pi
->imtu
= L2CAP_DEFAULT_MTU
;
776 pi
->mode
= L2CAP_MODE_BASIC
;
777 pi
->fcs
= L2CAP_FCS_CRC16
;
778 pi
->sec_level
= BT_SECURITY_LOW
;
780 pi
->force_reliable
= 0;
783 /* Default config options */
785 pi
->flush_to
= L2CAP_DEFAULT_FLUSH_TO
;
786 skb_queue_head_init(TX_QUEUE(sk
));
787 skb_queue_head_init(SREJ_QUEUE(sk
));
788 INIT_LIST_HEAD(SREJ_LIST(sk
));
791 static struct proto l2cap_proto
= {
793 .owner
= THIS_MODULE
,
794 .obj_size
= sizeof(struct l2cap_pinfo
)
797 static struct sock
*l2cap_sock_alloc(struct net
*net
, struct socket
*sock
, int proto
, gfp_t prio
)
801 sk
= sk_alloc(net
, PF_BLUETOOTH
, prio
, &l2cap_proto
);
805 sock_init_data(sock
, sk
);
806 INIT_LIST_HEAD(&bt_sk(sk
)->accept_q
);
808 sk
->sk_destruct
= l2cap_sock_destruct
;
809 sk
->sk_sndtimeo
= msecs_to_jiffies(L2CAP_CONN_TIMEOUT
);
811 sock_reset_flag(sk
, SOCK_ZAPPED
);
813 sk
->sk_protocol
= proto
;
814 sk
->sk_state
= BT_OPEN
;
816 setup_timer(&sk
->sk_timer
, l2cap_sock_timeout
, (unsigned long) sk
);
818 bt_sock_link(&l2cap_sk_list
, sk
);
822 static int l2cap_sock_create(struct net
*net
, struct socket
*sock
, int protocol
,
827 BT_DBG("sock %p", sock
);
829 sock
->state
= SS_UNCONNECTED
;
831 if (sock
->type
!= SOCK_SEQPACKET
&&
832 sock
->type
!= SOCK_DGRAM
&& sock
->type
!= SOCK_RAW
)
833 return -ESOCKTNOSUPPORT
;
835 if (sock
->type
== SOCK_RAW
&& !kern
&& !capable(CAP_NET_RAW
))
838 sock
->ops
= &l2cap_sock_ops
;
840 sk
= l2cap_sock_alloc(net
, sock
, protocol
, GFP_ATOMIC
);
844 l2cap_sock_init(sk
, NULL
);
848 static int l2cap_sock_bind(struct socket
*sock
, struct sockaddr
*addr
, int alen
)
850 struct sock
*sk
= sock
->sk
;
851 struct sockaddr_l2 la
;
856 if (!addr
|| addr
->sa_family
!= AF_BLUETOOTH
)
859 memset(&la
, 0, sizeof(la
));
860 len
= min_t(unsigned int, sizeof(la
), alen
);
861 memcpy(&la
, addr
, len
);
868 if (sk
->sk_state
!= BT_OPEN
) {
873 if (la
.l2_psm
&& __le16_to_cpu(la
.l2_psm
) < 0x1001 &&
874 !capable(CAP_NET_BIND_SERVICE
)) {
879 write_lock_bh(&l2cap_sk_list
.lock
);
881 if (la
.l2_psm
&& __l2cap_get_sock_by_addr(la
.l2_psm
, &la
.l2_bdaddr
)) {
884 /* Save source address */
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
;
888 sk
->sk_state
= BT_BOUND
;
890 if (__le16_to_cpu(la
.l2_psm
) == 0x0001 ||
891 __le16_to_cpu(la
.l2_psm
) == 0x0003)
892 l2cap_pi(sk
)->sec_level
= BT_SECURITY_SDP
;
895 write_unlock_bh(&l2cap_sk_list
.lock
);
902 static int l2cap_do_connect(struct sock
*sk
)
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
;
912 BT_DBG("%s -> %s psm 0x%2.2x", batostr(src
), batostr(dst
),
915 hdev
= hci_get_route(dst
, src
);
917 return -EHOSTUNREACH
;
919 hci_dev_lock_bh(hdev
);
923 if (sk
->sk_type
== SOCK_RAW
) {
924 switch (l2cap_pi(sk
)->sec_level
) {
925 case BT_SECURITY_HIGH
:
926 auth_type
= HCI_AT_DEDICATED_BONDING_MITM
;
928 case BT_SECURITY_MEDIUM
:
929 auth_type
= HCI_AT_DEDICATED_BONDING
;
932 auth_type
= HCI_AT_NO_BONDING
;
935 } else if (l2cap_pi(sk
)->psm
== cpu_to_le16(0x0001)) {
936 if (l2cap_pi(sk
)->sec_level
== BT_SECURITY_HIGH
)
937 auth_type
= HCI_AT_NO_BONDING_MITM
;
939 auth_type
= HCI_AT_NO_BONDING
;
941 if (l2cap_pi(sk
)->sec_level
== BT_SECURITY_LOW
)
942 l2cap_pi(sk
)->sec_level
= BT_SECURITY_SDP
;
944 switch (l2cap_pi(sk
)->sec_level
) {
945 case BT_SECURITY_HIGH
:
946 auth_type
= HCI_AT_GENERAL_BONDING_MITM
;
948 case BT_SECURITY_MEDIUM
:
949 auth_type
= HCI_AT_GENERAL_BONDING
;
952 auth_type
= HCI_AT_NO_BONDING
;
957 hcon
= hci_connect(hdev
, ACL_LINK
, dst
,
958 l2cap_pi(sk
)->sec_level
, auth_type
);
962 conn
= l2cap_conn_add(hcon
, 0);
970 /* Update source addr of the socket */
971 bacpy(src
, conn
->src
);
973 l2cap_chan_add(conn
, sk
, NULL
);
975 sk
->sk_state
= BT_CONNECT
;
976 l2cap_sock_set_timer(sk
, sk
->sk_sndtimeo
);
978 if (hcon
->state
== BT_CONNECTED
) {
979 if (sk
->sk_type
!= SOCK_SEQPACKET
) {
980 l2cap_sock_clear_timer(sk
);
981 sk
->sk_state
= BT_CONNECTED
;
987 hci_dev_unlock_bh(hdev
);
992 static int l2cap_sock_connect(struct socket
*sock
, struct sockaddr
*addr
, int alen
, int flags
)
994 struct sock
*sk
= sock
->sk
;
995 struct sockaddr_l2 la
;
1000 if (!addr
|| addr
->sa_family
!= AF_BLUETOOTH
)
1003 memset(&la
, 0, sizeof(la
));
1004 len
= min_t(unsigned int, sizeof(la
), alen
);
1005 memcpy(&la
, addr
, len
);
1012 if (sk
->sk_type
== SOCK_SEQPACKET
&& !la
.l2_psm
) {
1017 switch (l2cap_pi(sk
)->mode
) {
1018 case L2CAP_MODE_BASIC
:
1020 case L2CAP_MODE_ERTM
:
1021 case L2CAP_MODE_STREAMING
:
1030 switch (sk
->sk_state
) {
1034 /* Already connecting */
1038 /* Already connected */
1051 /* Set destination address and psm */
1052 bacpy(&bt_sk(sk
)->dst
, &la
.l2_bdaddr
);
1053 l2cap_pi(sk
)->psm
= la
.l2_psm
;
1055 err
= l2cap_do_connect(sk
);
1060 err
= bt_sock_wait_state(sk
, BT_CONNECTED
,
1061 sock_sndtimeo(sk
, flags
& O_NONBLOCK
));
1067 static int l2cap_sock_listen(struct socket
*sock
, int backlog
)
1069 struct sock
*sk
= sock
->sk
;
1072 BT_DBG("sk %p backlog %d", sk
, backlog
);
1076 if (sk
->sk_state
!= BT_BOUND
|| sock
->type
!= SOCK_SEQPACKET
) {
1081 switch (l2cap_pi(sk
)->mode
) {
1082 case L2CAP_MODE_BASIC
:
1084 case L2CAP_MODE_ERTM
:
1085 case L2CAP_MODE_STREAMING
:
1094 if (!l2cap_pi(sk
)->psm
) {
1095 bdaddr_t
*src
= &bt_sk(sk
)->src
;
1100 write_lock_bh(&l2cap_sk_list
.lock
);
1102 for (psm
= 0x1001; psm
< 0x1100; psm
+= 2)
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
);
1110 write_unlock_bh(&l2cap_sk_list
.lock
);
1116 sk
->sk_max_ack_backlog
= backlog
;
1117 sk
->sk_ack_backlog
= 0;
1118 sk
->sk_state
= BT_LISTEN
;
1125 static int l2cap_sock_accept(struct socket
*sock
, struct socket
*newsock
, int flags
)
1127 DECLARE_WAITQUEUE(wait
, current
);
1128 struct sock
*sk
= sock
->sk
, *nsk
;
1132 lock_sock_nested(sk
, SINGLE_DEPTH_NESTING
);
1134 if (sk
->sk_state
!= BT_LISTEN
) {
1139 timeo
= sock_rcvtimeo(sk
, flags
& O_NONBLOCK
);
1141 BT_DBG("sk %p timeo %ld", sk
, timeo
);
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
);
1153 timeo
= schedule_timeout(timeo
);
1154 lock_sock_nested(sk
, SINGLE_DEPTH_NESTING
);
1156 if (sk
->sk_state
!= BT_LISTEN
) {
1161 if (signal_pending(current
)) {
1162 err
= sock_intr_errno(timeo
);
1166 set_current_state(TASK_RUNNING
);
1167 remove_wait_queue(sk
->sk_sleep
, &wait
);
1172 newsock
->state
= SS_CONNECTED
;
1174 BT_DBG("new socket %p", nsk
);
1181 static int l2cap_sock_getname(struct socket
*sock
, struct sockaddr
*addr
, int *len
, int peer
)
1183 struct sockaddr_l2
*la
= (struct sockaddr_l2
*) addr
;
1184 struct sock
*sk
= sock
->sk
;
1186 BT_DBG("sock %p, sk %p", sock
, sk
);
1188 addr
->sa_family
= AF_BLUETOOTH
;
1189 *len
= sizeof(struct sockaddr_l2
);
1192 la
->l2_psm
= l2cap_pi(sk
)->psm
;
1193 bacpy(&la
->l2_bdaddr
, &bt_sk(sk
)->dst
);
1194 la
->l2_cid
= cpu_to_le16(l2cap_pi(sk
)->dcid
);
1196 la
->l2_psm
= l2cap_pi(sk
)->sport
;
1197 bacpy(&la
->l2_bdaddr
, &bt_sk(sk
)->src
);
1198 la
->l2_cid
= cpu_to_le16(l2cap_pi(sk
)->scid
);
1204 static void l2cap_monitor_timeout(unsigned long arg
)
1206 struct sock
*sk
= (void *) arg
;
1210 if (l2cap_pi(sk
)->retry_count
>= l2cap_pi(sk
)->remote_max_tx
) {
1211 l2cap_send_disconn_req(l2cap_pi(sk
)->conn
, sk
);
1215 l2cap_pi(sk
)->retry_count
++;
1216 __mod_monitor_timer();
1218 control
= L2CAP_CTRL_POLL
;
1219 l2cap_send_rr_or_rnr(l2cap_pi(sk
), control
);
1223 static void l2cap_retrans_timeout(unsigned long arg
)
1225 struct sock
*sk
= (void *) arg
;
1229 l2cap_pi(sk
)->retry_count
= 1;
1230 __mod_monitor_timer();
1232 l2cap_pi(sk
)->conn_state
|= L2CAP_CONN_WAIT_F
;
1234 control
= L2CAP_CTRL_POLL
;
1235 l2cap_send_rr_or_rnr(l2cap_pi(sk
), control
);
1239 static void l2cap_drop_acked_frames(struct sock
*sk
)
1241 struct sk_buff
*skb
;
1243 while ((skb
= skb_peek(TX_QUEUE(sk
)))) {
1244 if (bt_cb(skb
)->tx_seq
== l2cap_pi(sk
)->expected_ack_seq
)
1247 skb
= skb_dequeue(TX_QUEUE(sk
));
1250 l2cap_pi(sk
)->unacked_frames
--;
1253 if (!l2cap_pi(sk
)->unacked_frames
)
1254 del_timer(&l2cap_pi(sk
)->retrans_timer
);
1259 static inline int l2cap_do_send(struct sock
*sk
, struct sk_buff
*skb
)
1261 struct l2cap_pinfo
*pi
= l2cap_pi(sk
);
1264 BT_DBG("sk %p, skb %p len %d", sk
, skb
, skb
->len
);
1266 err
= hci_send_acl(pi
->conn
->hcon
, skb
, 0);
1273 static int l2cap_streaming_send(struct sock
*sk
)
1275 struct sk_buff
*skb
, *tx_skb
;
1276 struct l2cap_pinfo
*pi
= l2cap_pi(sk
);
1280 while ((skb
= sk
->sk_send_head
)) {
1281 tx_skb
= skb_clone(skb
, GFP_ATOMIC
);
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
);
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);
1292 err
= l2cap_do_send(sk
, tx_skb
);
1294 l2cap_send_disconn_req(pi
->conn
, sk
);
1298 pi
->next_tx_seq
= (pi
->next_tx_seq
+ 1) % 64;
1300 if (skb_queue_is_last(TX_QUEUE(sk
), skb
))
1301 sk
->sk_send_head
= NULL
;
1303 sk
->sk_send_head
= skb_queue_next(TX_QUEUE(sk
), skb
);
1305 skb
= skb_dequeue(TX_QUEUE(sk
));
1311 static int l2cap_retransmit_frame(struct sock
*sk
, u8 tx_seq
)
1313 struct l2cap_pinfo
*pi
= l2cap_pi(sk
);
1314 struct sk_buff
*skb
, *tx_skb
;
1318 skb
= skb_peek(TX_QUEUE(sk
));
1320 if (bt_cb(skb
)->tx_seq
!= tx_seq
) {
1321 if (skb_queue_is_last(TX_QUEUE(sk
), skb
))
1323 skb
= skb_queue_next(TX_QUEUE(sk
), skb
);
1327 if (pi
->remote_max_tx
&&
1328 bt_cb(skb
)->retries
== pi
->remote_max_tx
) {
1329 l2cap_send_disconn_req(pi
->conn
, sk
);
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
);
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);
1345 err
= l2cap_do_send(sk
, tx_skb
);
1347 l2cap_send_disconn_req(pi
->conn
, sk
);
1355 static int l2cap_ertm_send(struct sock
*sk
)
1357 struct sk_buff
*skb
, *tx_skb
;
1358 struct l2cap_pinfo
*pi
= l2cap_pi(sk
);
1362 if (pi
->conn_state
& L2CAP_CONN_WAIT_F
)
1365 while ((skb
= sk
->sk_send_head
) && (!l2cap_tx_window_full(sk
))
1366 && !(pi
->conn_state
& L2CAP_CONN_REMOTE_BUSY
)) {
1367 tx_skb
= skb_clone(skb
, GFP_ATOMIC
);
1369 if (pi
->remote_max_tx
&&
1370 bt_cb(skb
)->retries
== pi
->remote_max_tx
) {
1371 l2cap_send_disconn_req(pi
->conn
, sk
);
1375 bt_cb(skb
)->retries
++;
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
);
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);
1388 err
= l2cap_do_send(sk
, tx_skb
);
1390 l2cap_send_disconn_req(pi
->conn
, sk
);
1393 __mod_retrans_timer();
1395 bt_cb(skb
)->tx_seq
= pi
->next_tx_seq
;
1396 pi
->next_tx_seq
= (pi
->next_tx_seq
+ 1) % 64;
1398 pi
->unacked_frames
++;
1400 if (skb_queue_is_last(TX_QUEUE(sk
), skb
))
1401 sk
->sk_send_head
= NULL
;
1403 sk
->sk_send_head
= skb_queue_next(TX_QUEUE(sk
), skb
);
1409 static inline int l2cap_skbuff_fromiovec(struct sock
*sk
, struct msghdr
*msg
, int len
, int count
, struct sk_buff
*skb
)
1411 struct l2cap_conn
*conn
= l2cap_pi(sk
)->conn
;
1412 struct sk_buff
**frag
;
1415 if (memcpy_fromiovec(skb_put(skb
, count
), msg
->msg_iov
, count
)) {
1422 /* Continuation fragments (no L2CAP header) */
1423 frag
= &skb_shinfo(skb
)->frag_list
;
1425 count
= min_t(unsigned int, conn
->mtu
, len
);
1427 *frag
= bt_skb_send_alloc(sk
, count
, msg
->msg_flags
& MSG_DONTWAIT
, &err
);
1430 if (memcpy_fromiovec(skb_put(*frag
, count
), msg
->msg_iov
, count
))
1436 frag
= &(*frag
)->next
;
1442 static struct sk_buff
*l2cap_create_connless_pdu(struct sock
*sk
, struct msghdr
*msg
, size_t len
)
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
;
1449 BT_DBG("sk %p len %d", sk
, (int)len
);
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
);
1455 return ERR_PTR(-ENOMEM
);
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));
1463 err
= l2cap_skbuff_fromiovec(sk
, msg
, len
, count
, skb
);
1464 if (unlikely(err
< 0)) {
1466 return ERR_PTR(err
);
1471 static struct sk_buff
*l2cap_create_basic_pdu(struct sock
*sk
, struct msghdr
*msg
, size_t len
)
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
;
1478 BT_DBG("sk %p len %d", sk
, (int)len
);
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
);
1484 return ERR_PTR(-ENOMEM
);
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
));
1491 err
= l2cap_skbuff_fromiovec(sk
, msg
, len
, count
, skb
);
1492 if (unlikely(err
< 0)) {
1494 return ERR_PTR(err
);
1499 static struct sk_buff
*l2cap_create_iframe_pdu(struct sock
*sk
, struct msghdr
*msg
, size_t len
, u16 control
, u16 sdulen
)
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
;
1506 BT_DBG("sk %p len %d", sk
, (int)len
);
1511 if (l2cap_pi(sk
)->fcs
== L2CAP_FCS_CRC16
)
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
);
1518 return ERR_PTR(-ENOMEM
);
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));
1526 put_unaligned_le16(sdulen
, skb_put(skb
, 2));
1528 err
= l2cap_skbuff_fromiovec(sk
, msg
, len
, count
, skb
);
1529 if (unlikely(err
< 0)) {
1531 return ERR_PTR(err
);
1534 if (l2cap_pi(sk
)->fcs
== L2CAP_FCS_CRC16
)
1535 put_unaligned_le16(0, skb_put(skb
, 2));
1537 bt_cb(skb
)->retries
= 0;
1541 static inline int l2cap_sar_segment_sdu(struct sock
*sk
, struct msghdr
*msg
, size_t len
)
1543 struct l2cap_pinfo
*pi
= l2cap_pi(sk
);
1544 struct sk_buff
*skb
;
1545 struct sk_buff_head sar_queue
;
1549 __skb_queue_head_init(&sar_queue
);
1550 control
= L2CAP_SDU_START
;
1551 skb
= l2cap_create_iframe_pdu(sk
, msg
, pi
->max_pdu_size
, control
, len
);
1553 return PTR_ERR(skb
);
1555 __skb_queue_tail(&sar_queue
, skb
);
1556 len
-= pi
->max_pdu_size
;
1557 size
+=pi
->max_pdu_size
;
1563 if (len
> pi
->max_pdu_size
) {
1564 control
|= L2CAP_SDU_CONTINUE
;
1565 buflen
= pi
->max_pdu_size
;
1567 control
|= L2CAP_SDU_END
;
1571 skb
= l2cap_create_iframe_pdu(sk
, msg
, buflen
, control
, 0);
1573 skb_queue_purge(&sar_queue
);
1574 return PTR_ERR(skb
);
1577 __skb_queue_tail(&sar_queue
, skb
);
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
;
1589 static int l2cap_sock_sendmsg(struct kiocb
*iocb
, struct socket
*sock
, struct msghdr
*msg
, size_t len
)
1591 struct sock
*sk
= sock
->sk
;
1592 struct l2cap_pinfo
*pi
= l2cap_pi(sk
);
1593 struct sk_buff
*skb
;
1597 BT_DBG("sock %p, sk %p", sock
, sk
);
1599 err
= sock_error(sk
);
1603 if (msg
->msg_flags
& MSG_OOB
)
1606 /* Check outgoing MTU */
1607 if (sk
->sk_type
== SOCK_SEQPACKET
&& pi
->mode
== L2CAP_MODE_BASIC
1613 if (sk
->sk_state
!= BT_CONNECTED
) {
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
);
1626 case L2CAP_MODE_BASIC
:
1627 /* Create a basic PDU */
1628 skb
= l2cap_create_basic_pdu(sk
, msg
, len
);
1634 err
= l2cap_do_send(sk
, skb
);
1639 case L2CAP_MODE_ERTM
:
1640 case L2CAP_MODE_STREAMING
:
1641 /* Entire SDU fits into one PDU */
1642 if (len
<= pi
->max_pdu_size
) {
1643 control
= L2CAP_SDU_UNSEGMENTED
;
1644 skb
= l2cap_create_iframe_pdu(sk
, msg
, len
, control
, 0);
1649 __skb_queue_tail(TX_QUEUE(sk
), skb
);
1650 if (sk
->sk_send_head
== NULL
)
1651 sk
->sk_send_head
= skb
;
1653 /* Segment SDU into multiples PDUs */
1654 err
= l2cap_sar_segment_sdu(sk
, msg
, len
);
1659 if (pi
->mode
== L2CAP_MODE_STREAMING
)
1660 err
= l2cap_streaming_send(sk
);
1662 err
= l2cap_ertm_send(sk
);
1669 BT_DBG("bad state %1.1x", pi
->mode
);
1678 static int l2cap_sock_recvmsg(struct kiocb
*iocb
, struct socket
*sock
, struct msghdr
*msg
, size_t len
, int flags
)
1680 struct sock
*sk
= sock
->sk
;
1684 if (sk
->sk_state
== BT_CONNECT2
&& bt_sk(sk
)->defer_setup
) {
1685 struct l2cap_conn_rsp rsp
;
1687 sk
->sk_state
= BT_CONFIG
;
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
);
1702 return bt_sock_recvmsg(iocb
, sock
, msg
, len
, flags
);
1705 static int l2cap_sock_setsockopt_old(struct socket
*sock
, int optname
, char __user
*optval
, unsigned int optlen
)
1707 struct sock
*sk
= sock
->sk
;
1708 struct l2cap_options opts
;
1712 BT_DBG("sk %p", sk
);
1718 opts
.imtu
= l2cap_pi(sk
)->imtu
;
1719 opts
.omtu
= l2cap_pi(sk
)->omtu
;
1720 opts
.flush_to
= l2cap_pi(sk
)->flush_to
;
1721 opts
.mode
= l2cap_pi(sk
)->mode
;
1722 opts
.fcs
= l2cap_pi(sk
)->fcs
;
1724 len
= min_t(unsigned int, sizeof(opts
), optlen
);
1725 if (copy_from_user((char *) &opts
, optval
, len
)) {
1730 l2cap_pi(sk
)->imtu
= opts
.imtu
;
1731 l2cap_pi(sk
)->omtu
= opts
.omtu
;
1732 l2cap_pi(sk
)->mode
= opts
.mode
;
1733 l2cap_pi(sk
)->fcs
= opts
.fcs
;
1737 if (get_user(opt
, (u32 __user
*) optval
)) {
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
;
1749 l2cap_pi(sk
)->role_switch
= (opt
& L2CAP_LM_MASTER
);
1750 l2cap_pi(sk
)->force_reliable
= (opt
& L2CAP_LM_RELIABLE
);
1762 static int l2cap_sock_setsockopt(struct socket
*sock
, int level
, int optname
, char __user
*optval
, unsigned int optlen
)
1764 struct sock
*sk
= sock
->sk
;
1765 struct bt_security sec
;
1769 BT_DBG("sk %p", sk
);
1771 if (level
== SOL_L2CAP
)
1772 return l2cap_sock_setsockopt_old(sock
, optname
, optval
, optlen
);
1774 if (level
!= SOL_BLUETOOTH
)
1775 return -ENOPROTOOPT
;
1781 if (sk
->sk_type
!= SOCK_SEQPACKET
&& sk
->sk_type
!= SOCK_RAW
) {
1786 sec
.level
= BT_SECURITY_LOW
;
1788 len
= min_t(unsigned int, sizeof(sec
), optlen
);
1789 if (copy_from_user((char *) &sec
, optval
, len
)) {
1794 if (sec
.level
< BT_SECURITY_LOW
||
1795 sec
.level
> BT_SECURITY_HIGH
) {
1800 l2cap_pi(sk
)->sec_level
= sec
.level
;
1803 case BT_DEFER_SETUP
:
1804 if (sk
->sk_state
!= BT_BOUND
&& sk
->sk_state
!= BT_LISTEN
) {
1809 if (get_user(opt
, (u32 __user
*) optval
)) {
1814 bt_sk(sk
)->defer_setup
= opt
;
1826 static int l2cap_sock_getsockopt_old(struct socket
*sock
, int optname
, char __user
*optval
, int __user
*optlen
)
1828 struct sock
*sk
= sock
->sk
;
1829 struct l2cap_options opts
;
1830 struct l2cap_conninfo cinfo
;
1834 BT_DBG("sk %p", sk
);
1836 if (get_user(len
, optlen
))
1843 opts
.imtu
= l2cap_pi(sk
)->imtu
;
1844 opts
.omtu
= l2cap_pi(sk
)->omtu
;
1845 opts
.flush_to
= l2cap_pi(sk
)->flush_to
;
1846 opts
.mode
= l2cap_pi(sk
)->mode
;
1847 opts
.fcs
= l2cap_pi(sk
)->fcs
;
1849 len
= min_t(unsigned int, len
, sizeof(opts
));
1850 if (copy_to_user(optval
, (char *) &opts
, len
))
1856 switch (l2cap_pi(sk
)->sec_level
) {
1857 case BT_SECURITY_LOW
:
1858 opt
= L2CAP_LM_AUTH
;
1860 case BT_SECURITY_MEDIUM
:
1861 opt
= L2CAP_LM_AUTH
| L2CAP_LM_ENCRYPT
;
1863 case BT_SECURITY_HIGH
:
1864 opt
= L2CAP_LM_AUTH
| L2CAP_LM_ENCRYPT
|
1872 if (l2cap_pi(sk
)->role_switch
)
1873 opt
|= L2CAP_LM_MASTER
;
1875 if (l2cap_pi(sk
)->force_reliable
)
1876 opt
|= L2CAP_LM_RELIABLE
;
1878 if (put_user(opt
, (u32 __user
*) optval
))
1882 case L2CAP_CONNINFO
:
1883 if (sk
->sk_state
!= BT_CONNECTED
&&
1884 !(sk
->sk_state
== BT_CONNECT2
&&
1885 bt_sk(sk
)->defer_setup
)) {
1890 cinfo
.hci_handle
= l2cap_pi(sk
)->conn
->hcon
->handle
;
1891 memcpy(cinfo
.dev_class
, l2cap_pi(sk
)->conn
->hcon
->dev_class
, 3);
1893 len
= min_t(unsigned int, len
, sizeof(cinfo
));
1894 if (copy_to_user(optval
, (char *) &cinfo
, len
))
1908 static int l2cap_sock_getsockopt(struct socket
*sock
, int level
, int optname
, char __user
*optval
, int __user
*optlen
)
1910 struct sock
*sk
= sock
->sk
;
1911 struct bt_security sec
;
1914 BT_DBG("sk %p", sk
);
1916 if (level
== SOL_L2CAP
)
1917 return l2cap_sock_getsockopt_old(sock
, optname
, optval
, optlen
);
1919 if (level
!= SOL_BLUETOOTH
)
1920 return -ENOPROTOOPT
;
1922 if (get_user(len
, optlen
))
1929 if (sk
->sk_type
!= SOCK_SEQPACKET
&& sk
->sk_type
!= SOCK_RAW
) {
1934 sec
.level
= l2cap_pi(sk
)->sec_level
;
1936 len
= min_t(unsigned int, len
, sizeof(sec
));
1937 if (copy_to_user(optval
, (char *) &sec
, len
))
1942 case BT_DEFER_SETUP
:
1943 if (sk
->sk_state
!= BT_BOUND
&& sk
->sk_state
!= BT_LISTEN
) {
1948 if (put_user(bt_sk(sk
)->defer_setup
, (u32 __user
*) optval
))
1962 static int l2cap_sock_shutdown(struct socket
*sock
, int how
)
1964 struct sock
*sk
= sock
->sk
;
1967 BT_DBG("sock %p, sk %p", 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);
1978 if (sock_flag(sk
, SOCK_LINGER
) && sk
->sk_lingertime
)
1979 err
= bt_sock_wait_state(sk
, BT_CLOSED
,
1986 static int l2cap_sock_release(struct socket
*sock
)
1988 struct sock
*sk
= sock
->sk
;
1991 BT_DBG("sock %p, sk %p", sock
, sk
);
1996 err
= l2cap_sock_shutdown(sock
, 2);
1999 l2cap_sock_kill(sk
);
2003 static void l2cap_chan_ready(struct sock
*sk
)
2005 struct sock
*parent
= bt_sk(sk
)->parent
;
2007 BT_DBG("sk %p, parent %p", sk
, parent
);
2009 l2cap_pi(sk
)->conf_state
= 0;
2010 l2cap_sock_clear_timer(sk
);
2013 /* Outgoing channel.
2014 * Wake up socket sleeping on connect.
2016 sk
->sk_state
= BT_CONNECTED
;
2017 sk
->sk_state_change(sk
);
2019 /* Incoming channel.
2020 * Wake up socket sleeping on accept.
2022 parent
->sk_data_ready(parent
, 0);
2026 /* Copy frame to all raw sockets on that connection */
2027 static void l2cap_raw_recv(struct l2cap_conn
*conn
, struct sk_buff
*skb
)
2029 struct l2cap_chan_list
*l
= &conn
->chan_list
;
2030 struct sk_buff
*nskb
;
2033 BT_DBG("conn %p", conn
);
2035 read_lock(&l
->lock
);
2036 for (sk
= l
->head
; sk
; sk
= l2cap_pi(sk
)->next_c
) {
2037 if (sk
->sk_type
!= SOCK_RAW
)
2040 /* Don't send frame to the socket it came from */
2043 nskb
= skb_clone(skb
, GFP_ATOMIC
);
2047 if (sock_queue_rcv_skb(sk
, nskb
))
2050 read_unlock(&l
->lock
);
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
)
2057 struct sk_buff
*skb
, **frag
;
2058 struct l2cap_cmd_hdr
*cmd
;
2059 struct l2cap_hdr
*lh
;
2062 BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d",
2063 conn
, code
, ident
, dlen
);
2065 len
= L2CAP_HDR_SIZE
+ L2CAP_CMD_HDR_SIZE
+ dlen
;
2066 count
= min_t(unsigned int, conn
->mtu
, len
);
2068 skb
= bt_skb_alloc(count
, GFP_ATOMIC
);
2072 lh
= (struct l2cap_hdr
*) skb_put(skb
, L2CAP_HDR_SIZE
);
2073 lh
->len
= cpu_to_le16(L2CAP_CMD_HDR_SIZE
+ dlen
);
2074 lh
->cid
= cpu_to_le16(L2CAP_CID_SIGNALING
);
2076 cmd
= (struct l2cap_cmd_hdr
*) skb_put(skb
, L2CAP_CMD_HDR_SIZE
);
2079 cmd
->len
= cpu_to_le16(dlen
);
2082 count
-= L2CAP_HDR_SIZE
+ L2CAP_CMD_HDR_SIZE
;
2083 memcpy(skb_put(skb
, count
), data
, count
);
2089 /* Continuation fragments (no L2CAP header) */
2090 frag
= &skb_shinfo(skb
)->frag_list
;
2092 count
= min_t(unsigned int, conn
->mtu
, len
);
2094 *frag
= bt_skb_alloc(count
, GFP_ATOMIC
);
2098 memcpy(skb_put(*frag
, count
), data
, count
);
2103 frag
= &(*frag
)->next
;
2113 static inline int l2cap_get_conf_opt(void **ptr
, int *type
, int *olen
, unsigned long *val
)
2115 struct l2cap_conf_opt
*opt
= *ptr
;
2118 len
= L2CAP_CONF_OPT_SIZE
+ opt
->len
;
2126 *val
= *((u8
*) opt
->val
);
2130 *val
= __le16_to_cpu(*((__le16
*) opt
->val
));
2134 *val
= __le32_to_cpu(*((__le32
*) opt
->val
));
2138 *val
= (unsigned long) opt
->val
;
2142 BT_DBG("type 0x%2.2x len %d val 0x%lx", *type
, opt
->len
, *val
);
2146 static void l2cap_add_conf_opt(void **ptr
, u8 type
, u8 len
, unsigned long val
)
2148 struct l2cap_conf_opt
*opt
= *ptr
;
2150 BT_DBG("type 0x%2.2x len %d val 0x%lx", type
, len
, val
);
2157 *((u8
*) opt
->val
) = val
;
2161 *((__le16
*) opt
->val
) = cpu_to_le16(val
);
2165 *((__le32
*) opt
->val
) = cpu_to_le32(val
);
2169 memcpy(opt
->val
, (void *) val
, len
);
2173 *ptr
+= L2CAP_CONF_OPT_SIZE
+ len
;
2176 static int l2cap_mode_supported(__u8 mode
, __u32 feat_mask
)
2178 u32 local_feat_mask
= l2cap_feat_mask
;
2180 local_feat_mask
|= L2CAP_FEAT_ERTM
| L2CAP_FEAT_STREAMING
;
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
;
2192 static inline __u8
l2cap_select_mode(__u8 mode
, __u16 remote_feat_mask
)
2195 case L2CAP_MODE_STREAMING
:
2196 case L2CAP_MODE_ERTM
:
2197 if (l2cap_mode_supported(mode
, remote_feat_mask
))
2201 return L2CAP_MODE_BASIC
;
2205 static int l2cap_build_conf_req(struct sock
*sk
, void *data
)
2207 struct l2cap_pinfo
*pi
= l2cap_pi(sk
);
2208 struct l2cap_conf_req
*req
= data
;
2209 struct l2cap_conf_rfc rfc
= { .mode
= L2CAP_MODE_BASIC
};
2210 void *ptr
= req
->data
;
2212 BT_DBG("sk %p", sk
);
2214 if (pi
->num_conf_req
|| pi
->num_conf_rsp
)
2218 case L2CAP_MODE_STREAMING
:
2219 case L2CAP_MODE_ERTM
:
2220 pi
->conf_state
|= L2CAP_CONF_STATE2_DEVICE
;
2221 if (!l2cap_mode_supported(pi
->mode
, pi
->conn
->feat_mask
))
2222 l2cap_send_disconn_req(pi
->conn
, sk
);
2225 pi
->mode
= l2cap_select_mode(rfc
.mode
, pi
->conn
->feat_mask
);
2231 case L2CAP_MODE_BASIC
:
2232 if (pi
->imtu
!= L2CAP_DEFAULT_MTU
)
2233 l2cap_add_conf_opt(&ptr
, L2CAP_CONF_MTU
, 2, pi
->imtu
);
2236 case L2CAP_MODE_ERTM
:
2237 rfc
.mode
= L2CAP_MODE_ERTM
;
2238 rfc
.txwin_size
= L2CAP_DEFAULT_TX_WINDOW
;
2239 rfc
.max_transmit
= L2CAP_DEFAULT_MAX_TX
;
2240 rfc
.retrans_timeout
= 0;
2241 rfc
.monitor_timeout
= 0;
2242 rfc
.max_pdu_size
= cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE
);
2244 l2cap_add_conf_opt(&ptr
, L2CAP_CONF_RFC
,
2245 sizeof(rfc
), (unsigned long) &rfc
);
2247 if (!(pi
->conn
->feat_mask
& L2CAP_FEAT_FCS
))
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
);
2257 case L2CAP_MODE_STREAMING
:
2258 rfc
.mode
= L2CAP_MODE_STREAMING
;
2260 rfc
.max_transmit
= 0;
2261 rfc
.retrans_timeout
= 0;
2262 rfc
.monitor_timeout
= 0;
2263 rfc
.max_pdu_size
= cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE
);
2265 l2cap_add_conf_opt(&ptr
, L2CAP_CONF_RFC
,
2266 sizeof(rfc
), (unsigned long) &rfc
);
2268 if (!(pi
->conn
->feat_mask
& L2CAP_FEAT_FCS
))
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
);
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);
2283 req
->dcid
= cpu_to_le16(pi
->dcid
);
2284 req
->flags
= cpu_to_le16(0);
2289 static int l2cap_parse_conf_req(struct sock
*sk
, void *data
)
2291 struct l2cap_pinfo
*pi
= l2cap_pi(sk
);
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
;
2298 struct l2cap_conf_rfc rfc
= { .mode
= L2CAP_MODE_BASIC
};
2299 u16 mtu
= L2CAP_DEFAULT_MTU
;
2300 u16 result
= L2CAP_CONF_SUCCESS
;
2302 BT_DBG("sk %p", sk
);
2304 while (len
>= L2CAP_CONF_OPT_SIZE
) {
2305 len
-= l2cap_get_conf_opt(&req
, &type
, &olen
, &val
);
2307 hint
= type
& L2CAP_CONF_HINT
;
2308 type
&= L2CAP_CONF_MASK
;
2311 case L2CAP_CONF_MTU
:
2315 case L2CAP_CONF_FLUSH_TO
:
2319 case L2CAP_CONF_QOS
:
2322 case L2CAP_CONF_RFC
:
2323 if (olen
== sizeof(rfc
))
2324 memcpy(&rfc
, (void *) val
, olen
);
2327 case L2CAP_CONF_FCS
:
2328 if (val
== L2CAP_FCS_NONE
)
2329 pi
->conf_state
|= L2CAP_CONF_NO_FCS_RECV
;
2337 result
= L2CAP_CONF_UNKNOWN
;
2338 *((u8
*) ptr
++) = type
;
2343 if (pi
->num_conf_rsp
|| pi
->num_conf_req
)
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
;
2354 pi
->mode
= l2cap_select_mode(rfc
.mode
, pi
->conn
->feat_mask
);
2359 if (pi
->mode
!= rfc
.mode
) {
2360 result
= L2CAP_CONF_UNACCEPT
;
2361 rfc
.mode
= pi
->mode
;
2363 if (pi
->num_conf_rsp
== 1)
2364 return -ECONNREFUSED
;
2366 l2cap_add_conf_opt(&ptr
, L2CAP_CONF_RFC
,
2367 sizeof(rfc
), (unsigned long) &rfc
);
2371 if (result
== L2CAP_CONF_SUCCESS
) {
2372 /* Configure output options and let the other side know
2373 * which ones we don't like. */
2375 if (mtu
< L2CAP_DEFAULT_MIN_MTU
)
2376 result
= L2CAP_CONF_UNACCEPT
;
2379 pi
->conf_state
|= L2CAP_CONF_MTU_DONE
;
2381 l2cap_add_conf_opt(&ptr
, L2CAP_CONF_MTU
, 2, pi
->omtu
);
2384 case L2CAP_MODE_BASIC
:
2385 pi
->fcs
= L2CAP_FCS_NONE
;
2386 pi
->conf_state
|= L2CAP_CONF_MODE_DONE
;
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
;
2394 rfc
.retrans_timeout
= L2CAP_DEFAULT_RETRANS_TO
;
2395 rfc
.monitor_timeout
= L2CAP_DEFAULT_MONITOR_TO
;
2397 pi
->conf_state
|= L2CAP_CONF_MODE_DONE
;
2399 l2cap_add_conf_opt(&ptr
, L2CAP_CONF_RFC
,
2400 sizeof(rfc
), (unsigned long) &rfc
);
2404 case L2CAP_MODE_STREAMING
:
2405 pi
->remote_tx_win
= rfc
.txwin_size
;
2406 pi
->max_pdu_size
= rfc
.max_pdu_size
;
2408 pi
->conf_state
|= L2CAP_CONF_MODE_DONE
;
2410 l2cap_add_conf_opt(&ptr
, L2CAP_CONF_RFC
,
2411 sizeof(rfc
), (unsigned long) &rfc
);
2416 result
= L2CAP_CONF_UNACCEPT
;
2418 memset(&rfc
, 0, sizeof(rfc
));
2419 rfc
.mode
= pi
->mode
;
2422 if (result
== L2CAP_CONF_SUCCESS
)
2423 pi
->conf_state
|= L2CAP_CONF_OUTPUT_DONE
;
2425 rsp
->scid
= cpu_to_le16(pi
->dcid
);
2426 rsp
->result
= cpu_to_le16(result
);
2427 rsp
->flags
= cpu_to_le16(0x0000);
2432 static int l2cap_parse_conf_rsp(struct sock
*sk
, void *rsp
, int len
, void *data
, u16
*result
)
2434 struct l2cap_pinfo
*pi
= l2cap_pi(sk
);
2435 struct l2cap_conf_req
*req
= data
;
2436 void *ptr
= req
->data
;
2439 struct l2cap_conf_rfc rfc
;
2441 BT_DBG("sk %p, rsp %p, len %d, req %p", sk
, rsp
, len
, data
);
2443 while (len
>= L2CAP_CONF_OPT_SIZE
) {
2444 len
-= l2cap_get_conf_opt(&rsp
, &type
, &olen
, &val
);
2447 case L2CAP_CONF_MTU
:
2448 if (val
< L2CAP_DEFAULT_MIN_MTU
) {
2449 *result
= L2CAP_CONF_UNACCEPT
;
2450 pi
->omtu
= L2CAP_DEFAULT_MIN_MTU
;
2453 l2cap_add_conf_opt(&ptr
, L2CAP_CONF_MTU
, 2, pi
->omtu
);
2456 case L2CAP_CONF_FLUSH_TO
:
2458 l2cap_add_conf_opt(&ptr
, L2CAP_CONF_FLUSH_TO
,
2462 case L2CAP_CONF_RFC
:
2463 if (olen
== sizeof(rfc
))
2464 memcpy(&rfc
, (void *)val
, olen
);
2466 if ((pi
->conf_state
& L2CAP_CONF_STATE2_DEVICE
) &&
2467 rfc
.mode
!= pi
->mode
)
2468 return -ECONNREFUSED
;
2470 pi
->mode
= rfc
.mode
;
2473 l2cap_add_conf_opt(&ptr
, L2CAP_CONF_RFC
,
2474 sizeof(rfc
), (unsigned long) &rfc
);
2479 if (*result
== L2CAP_CONF_SUCCESS
) {
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
);
2487 case L2CAP_MODE_STREAMING
:
2488 pi
->max_pdu_size
= le16_to_cpu(rfc
.max_pdu_size
);
2493 req
->dcid
= cpu_to_le16(pi
->dcid
);
2494 req
->flags
= cpu_to_le16(0x0000);
2499 static int l2cap_build_conf_rsp(struct sock
*sk
, void *data
, u16 result
, u16 flags
)
2501 struct l2cap_conf_rsp
*rsp
= data
;
2502 void *ptr
= rsp
->data
;
2504 BT_DBG("sk %p", sk
);
2506 rsp
->scid
= cpu_to_le16(l2cap_pi(sk
)->dcid
);
2507 rsp
->result
= cpu_to_le16(result
);
2508 rsp
->flags
= cpu_to_le16(flags
);
2513 static inline int l2cap_command_rej(struct l2cap_conn
*conn
, struct l2cap_cmd_hdr
*cmd
, u8
*data
)
2515 struct l2cap_cmd_rej
*rej
= (struct l2cap_cmd_rej
*) data
;
2517 if (rej
->reason
!= 0x0000)
2520 if ((conn
->info_state
& L2CAP_INFO_FEAT_MASK_REQ_SENT
) &&
2521 cmd
->ident
== conn
->info_ident
) {
2522 del_timer(&conn
->info_timer
);
2524 conn
->info_state
|= L2CAP_INFO_FEAT_MASK_REQ_DONE
;
2525 conn
->info_ident
= 0;
2527 l2cap_conn_start(conn
);
2533 static inline int l2cap_connect_req(struct l2cap_conn
*conn
, struct l2cap_cmd_hdr
*cmd
, u8
*data
)
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
;
2539 int result
, status
= L2CAP_CS_NO_INFO
;
2541 u16 dcid
= 0, scid
= __le16_to_cpu(req
->scid
);
2542 __le16 psm
= req
->psm
;
2544 BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm
, scid
);
2546 /* Check if we have socket listening on psm */
2547 parent
= l2cap_get_sock_by_psm(BT_LISTEN
, psm
, conn
->src
);
2549 result
= L2CAP_CR_BAD_PSM
;
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
)) {
2556 conn
->disc_reason
= 0x05;
2557 result
= L2CAP_CR_SEC_BLOCK
;
2561 result
= L2CAP_CR_NO_MEM
;
2563 /* Check for backlog size */
2564 if (sk_acceptq_is_full(parent
)) {
2565 BT_DBG("backlog full %d", parent
->sk_ack_backlog
);
2569 sk
= l2cap_sock_alloc(sock_net(parent
), NULL
, BTPROTO_L2CAP
, GFP_ATOMIC
);
2573 write_lock_bh(&list
->lock
);
2575 /* Check if we already have channel with that dcid */
2576 if (__l2cap_get_chan_by_dcid(list
, scid
)) {
2577 write_unlock_bh(&list
->lock
);
2578 sock_set_flag(sk
, SOCK_ZAPPED
);
2579 l2cap_sock_kill(sk
);
2583 hci_conn_hold(conn
->hcon
);
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
;
2591 __l2cap_chan_add(conn
, sk
, parent
);
2592 dcid
= l2cap_pi(sk
)->scid
;
2594 l2cap_sock_set_timer(sk
, sk
->sk_sndtimeo
);
2596 l2cap_pi(sk
)->ident
= cmd
->ident
;
2598 if (conn
->info_state
& L2CAP_INFO_FEAT_MASK_REQ_DONE
) {
2599 if (l2cap_check_security(sk
)) {
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);
2606 sk
->sk_state
= BT_CONFIG
;
2607 result
= L2CAP_CR_SUCCESS
;
2608 status
= L2CAP_CS_NO_INFO
;
2611 sk
->sk_state
= BT_CONNECT2
;
2612 result
= L2CAP_CR_PEND
;
2613 status
= L2CAP_CS_AUTHEN_PEND
;
2616 sk
->sk_state
= BT_CONNECT2
;
2617 result
= L2CAP_CR_PEND
;
2618 status
= L2CAP_CS_NO_INFO
;
2621 write_unlock_bh(&list
->lock
);
2624 bh_unlock_sock(parent
);
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
);
2631 l2cap_send_cmd(conn
, cmd
->ident
, L2CAP_CONN_RSP
, sizeof(rsp
), &rsp
);
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
);
2637 conn
->info_state
|= L2CAP_INFO_FEAT_MASK_REQ_SENT
;
2638 conn
->info_ident
= l2cap_get_ident(conn
);
2640 mod_timer(&conn
->info_timer
, jiffies
+
2641 msecs_to_jiffies(L2CAP_INFO_TIMEOUT
));
2643 l2cap_send_cmd(conn
, conn
->info_ident
,
2644 L2CAP_INFO_REQ
, sizeof(info
), &info
);
2650 static inline int l2cap_connect_rsp(struct l2cap_conn
*conn
, struct l2cap_cmd_hdr
*cmd
, u8
*data
)
2652 struct l2cap_conn_rsp
*rsp
= (struct l2cap_conn_rsp
*) data
;
2653 u16 scid
, dcid
, result
, status
;
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
);
2662 BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid
, scid
, result
, status
);
2665 sk
= l2cap_get_chan_by_scid(&conn
->chan_list
, scid
);
2669 sk
= l2cap_get_chan_by_ident(&conn
->chan_list
, cmd
->ident
);
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
;
2681 l2cap_pi(sk
)->conf_state
&= ~L2CAP_CONF_CONNECT_PEND
;
2683 l2cap_send_cmd(conn
, l2cap_get_ident(conn
), L2CAP_CONF_REQ
,
2684 l2cap_build_conf_req(sk
, req
), req
);
2685 l2cap_pi(sk
)->num_conf_req
++;
2689 l2cap_pi(sk
)->conf_state
|= L2CAP_CONF_CONNECT_PEND
;
2693 l2cap_chan_del(sk
, ECONNREFUSED
);
2701 static inline int l2cap_config_req(struct l2cap_conn
*conn
, struct l2cap_cmd_hdr
*cmd
, u16 cmd_len
, u8
*data
)
2703 struct l2cap_conf_req
*req
= (struct l2cap_conf_req
*) data
;
2709 dcid
= __le16_to_cpu(req
->dcid
);
2710 flags
= __le16_to_cpu(req
->flags
);
2712 BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid
, flags
);
2714 sk
= l2cap_get_chan_by_scid(&conn
->chan_list
, dcid
);
2718 if (sk
->sk_state
== BT_DISCONN
)
2721 /* Reject if config buffer is too small. */
2722 len
= cmd_len
- sizeof(*req
);
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
);
2731 memcpy(l2cap_pi(sk
)->conf_req
+ l2cap_pi(sk
)->conf_len
, req
->data
, len
);
2732 l2cap_pi(sk
)->conf_len
+= len
;
2734 if (flags
& 0x0001) {
2735 /* Incomplete config. Send empty response. */
2736 l2cap_send_cmd(conn
, cmd
->ident
, L2CAP_CONF_RSP
,
2737 l2cap_build_conf_rsp(sk
, rsp
,
2738 L2CAP_CONF_SUCCESS
, 0x0001), rsp
);
2742 /* Complete config. */
2743 len
= l2cap_parse_conf_req(sk
, rsp
);
2745 l2cap_send_disconn_req(conn
, sk
);
2749 l2cap_send_cmd(conn
, cmd
->ident
, L2CAP_CONF_RSP
, len
, rsp
);
2750 l2cap_pi(sk
)->num_conf_rsp
++;
2752 /* Reset config buffer. */
2753 l2cap_pi(sk
)->conf_len
= 0;
2755 if (!(l2cap_pi(sk
)->conf_state
& L2CAP_CONF_OUTPUT_DONE
))
2758 if (l2cap_pi(sk
)->conf_state
& L2CAP_CONF_INPUT_DONE
) {
2759 if (!(l2cap_pi(sk
)->conf_state
& L2CAP_CONF_NO_FCS_RECV
)
2760 || l2cap_pi(sk
)->fcs
!= L2CAP_FCS_NONE
)
2761 l2cap_pi(sk
)->fcs
= L2CAP_FCS_CRC16
;
2763 sk
->sk_state
= BT_CONNECTED
;
2764 l2cap_pi(sk
)->next_tx_seq
= 0;
2765 l2cap_pi(sk
)->expected_ack_seq
= 0;
2766 l2cap_pi(sk
)->unacked_frames
= 0;
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
);
2773 __skb_queue_head_init(TX_QUEUE(sk
));
2774 __skb_queue_head_init(SREJ_QUEUE(sk
));
2775 l2cap_chan_ready(sk
);
2779 if (!(l2cap_pi(sk
)->conf_state
& L2CAP_CONF_REQ_SENT
)) {
2781 l2cap_send_cmd(conn
, l2cap_get_ident(conn
), L2CAP_CONF_REQ
,
2782 l2cap_build_conf_req(sk
, buf
), buf
);
2783 l2cap_pi(sk
)->num_conf_req
++;
2791 static inline int l2cap_config_rsp(struct l2cap_conn
*conn
, struct l2cap_cmd_hdr
*cmd
, u8
*data
)
2793 struct l2cap_conf_rsp
*rsp
= (struct l2cap_conf_rsp
*)data
;
2794 u16 scid
, flags
, result
;
2797 scid
= __le16_to_cpu(rsp
->scid
);
2798 flags
= __le16_to_cpu(rsp
->flags
);
2799 result
= __le16_to_cpu(rsp
->result
);
2801 BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x",
2802 scid
, flags
, result
);
2804 sk
= l2cap_get_chan_by_scid(&conn
->chan_list
, scid
);
2809 case L2CAP_CONF_SUCCESS
:
2812 case L2CAP_CONF_UNACCEPT
:
2813 if (l2cap_pi(sk
)->num_conf_rsp
<= L2CAP_CONF_MAX_CONF_RSP
) {
2814 int len
= cmd
->len
- sizeof(*rsp
);
2817 /* throw out any old stored conf requests */
2818 result
= L2CAP_CONF_SUCCESS
;
2819 len
= l2cap_parse_conf_rsp(sk
, rsp
->data
,
2822 l2cap_send_disconn_req(conn
, sk
);
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
)
2835 sk
->sk_state
= BT_DISCONN
;
2836 sk
->sk_err
= ECONNRESET
;
2837 l2cap_sock_set_timer(sk
, HZ
* 5);
2838 l2cap_send_disconn_req(conn
, sk
);
2845 l2cap_pi(sk
)->conf_state
|= L2CAP_CONF_INPUT_DONE
;
2847 if (l2cap_pi(sk
)->conf_state
& L2CAP_CONF_OUTPUT_DONE
) {
2848 if (!(l2cap_pi(sk
)->conf_state
& L2CAP_CONF_NO_FCS_RECV
)
2849 || l2cap_pi(sk
)->fcs
!= L2CAP_FCS_NONE
)
2850 l2cap_pi(sk
)->fcs
= L2CAP_FCS_CRC16
;
2852 sk
->sk_state
= BT_CONNECTED
;
2853 l2cap_pi(sk
)->expected_tx_seq
= 0;
2854 l2cap_pi(sk
)->buffer_seq
= 0;
2855 l2cap_pi(sk
)->num_to_ack
= 0;
2856 __skb_queue_head_init(TX_QUEUE(sk
));
2857 __skb_queue_head_init(SREJ_QUEUE(sk
));
2858 l2cap_chan_ready(sk
);
2866 static inline int l2cap_disconnect_req(struct l2cap_conn
*conn
, struct l2cap_cmd_hdr
*cmd
, u8
*data
)
2868 struct l2cap_disconn_req
*req
= (struct l2cap_disconn_req
*) data
;
2869 struct l2cap_disconn_rsp rsp
;
2873 scid
= __le16_to_cpu(req
->scid
);
2874 dcid
= __le16_to_cpu(req
->dcid
);
2876 BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid
, dcid
);
2878 sk
= l2cap_get_chan_by_scid(&conn
->chan_list
, dcid
);
2882 rsp
.dcid
= cpu_to_le16(l2cap_pi(sk
)->scid
);
2883 rsp
.scid
= cpu_to_le16(l2cap_pi(sk
)->dcid
);
2884 l2cap_send_cmd(conn
, cmd
->ident
, L2CAP_DISCONN_RSP
, sizeof(rsp
), &rsp
);
2886 sk
->sk_shutdown
= SHUTDOWN_MASK
;
2888 skb_queue_purge(TX_QUEUE(sk
));
2889 skb_queue_purge(SREJ_QUEUE(sk
));
2890 del_timer(&l2cap_pi(sk
)->retrans_timer
);
2891 del_timer(&l2cap_pi(sk
)->monitor_timer
);
2893 l2cap_chan_del(sk
, ECONNRESET
);
2896 l2cap_sock_kill(sk
);
2900 static inline int l2cap_disconnect_rsp(struct l2cap_conn
*conn
, struct l2cap_cmd_hdr
*cmd
, u8
*data
)
2902 struct l2cap_disconn_rsp
*rsp
= (struct l2cap_disconn_rsp
*) data
;
2906 scid
= __le16_to_cpu(rsp
->scid
);
2907 dcid
= __le16_to_cpu(rsp
->dcid
);
2909 BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid
, scid
);
2911 sk
= l2cap_get_chan_by_scid(&conn
->chan_list
, scid
);
2915 skb_queue_purge(TX_QUEUE(sk
));
2916 skb_queue_purge(SREJ_QUEUE(sk
));
2917 del_timer(&l2cap_pi(sk
)->retrans_timer
);
2918 del_timer(&l2cap_pi(sk
)->monitor_timer
);
2920 l2cap_chan_del(sk
, 0);
2923 l2cap_sock_kill(sk
);
2927 static inline int l2cap_information_req(struct l2cap_conn
*conn
, struct l2cap_cmd_hdr
*cmd
, u8
*data
)
2929 struct l2cap_info_req
*req
= (struct l2cap_info_req
*) data
;
2932 type
= __le16_to_cpu(req
->type
);
2934 BT_DBG("type 0x%4.4x", type
);
2936 if (type
== L2CAP_IT_FEAT_MASK
) {
2938 u32 feat_mask
= l2cap_feat_mask
;
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
);
2943 feat_mask
|= L2CAP_FEAT_ERTM
| L2CAP_FEAT_STREAMING
2945 put_unaligned_le32(feat_mask
, rsp
->data
);
2946 l2cap_send_cmd(conn
, cmd
->ident
,
2947 L2CAP_INFO_RSP
, sizeof(buf
), buf
);
2948 } else if (type
== L2CAP_IT_FIXED_CHAN
) {
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
);
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
);
2967 static inline int l2cap_information_rsp(struct l2cap_conn
*conn
, struct l2cap_cmd_hdr
*cmd
, u8
*data
)
2969 struct l2cap_info_rsp
*rsp
= (struct l2cap_info_rsp
*) data
;
2972 type
= __le16_to_cpu(rsp
->type
);
2973 result
= __le16_to_cpu(rsp
->result
);
2975 BT_DBG("type 0x%4.4x result 0x%2.2x", type
, result
);
2977 del_timer(&conn
->info_timer
);
2979 if (type
== L2CAP_IT_FEAT_MASK
) {
2980 conn
->feat_mask
= get_unaligned_le32(rsp
->data
);
2982 if (conn
->feat_mask
& L2CAP_FEAT_FIXED_CHAN
) {
2983 struct l2cap_info_req req
;
2984 req
.type
= cpu_to_le16(L2CAP_IT_FIXED_CHAN
);
2986 conn
->info_ident
= l2cap_get_ident(conn
);
2988 l2cap_send_cmd(conn
, conn
->info_ident
,
2989 L2CAP_INFO_REQ
, sizeof(req
), &req
);
2991 conn
->info_state
|= L2CAP_INFO_FEAT_MASK_REQ_DONE
;
2992 conn
->info_ident
= 0;
2994 l2cap_conn_start(conn
);
2996 } else if (type
== L2CAP_IT_FIXED_CHAN
) {
2997 conn
->info_state
|= L2CAP_INFO_FEAT_MASK_REQ_DONE
;
2998 conn
->info_ident
= 0;
3000 l2cap_conn_start(conn
);
3006 static inline void l2cap_sig_channel(struct l2cap_conn
*conn
, struct sk_buff
*skb
)
3008 u8
*data
= skb
->data
;
3010 struct l2cap_cmd_hdr cmd
;
3013 l2cap_raw_recv(conn
, skb
);
3015 while (len
>= L2CAP_CMD_HDR_SIZE
) {
3017 memcpy(&cmd
, data
, L2CAP_CMD_HDR_SIZE
);
3018 data
+= L2CAP_CMD_HDR_SIZE
;
3019 len
-= L2CAP_CMD_HDR_SIZE
;
3021 cmd_len
= le16_to_cpu(cmd
.len
);
3023 BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd
.code
, cmd_len
, cmd
.ident
);
3025 if (cmd_len
> len
|| !cmd
.ident
) {
3026 BT_DBG("corrupted command");
3031 case L2CAP_COMMAND_REJ
:
3032 l2cap_command_rej(conn
, &cmd
, data
);
3035 case L2CAP_CONN_REQ
:
3036 err
= l2cap_connect_req(conn
, &cmd
, data
);
3039 case L2CAP_CONN_RSP
:
3040 err
= l2cap_connect_rsp(conn
, &cmd
, data
);
3043 case L2CAP_CONF_REQ
:
3044 err
= l2cap_config_req(conn
, &cmd
, cmd_len
, data
);
3047 case L2CAP_CONF_RSP
:
3048 err
= l2cap_config_rsp(conn
, &cmd
, data
);
3051 case L2CAP_DISCONN_REQ
:
3052 err
= l2cap_disconnect_req(conn
, &cmd
, data
);
3055 case L2CAP_DISCONN_RSP
:
3056 err
= l2cap_disconnect_rsp(conn
, &cmd
, data
);
3059 case L2CAP_ECHO_REQ
:
3060 l2cap_send_cmd(conn
, cmd
.ident
, L2CAP_ECHO_RSP
, cmd_len
, data
);
3063 case L2CAP_ECHO_RSP
:
3066 case L2CAP_INFO_REQ
:
3067 err
= l2cap_information_req(conn
, &cmd
, data
);
3070 case L2CAP_INFO_RSP
:
3071 err
= l2cap_information_rsp(conn
, &cmd
, data
);
3075 BT_ERR("Unknown signaling command 0x%2.2x", cmd
.code
);
3081 struct l2cap_cmd_rej rej
;
3082 BT_DBG("error %d", err
);
3084 /* FIXME: Map err to a valid reason */
3085 rej
.reason
= cpu_to_le16(0);
3086 l2cap_send_cmd(conn
, cmd
.ident
, L2CAP_COMMAND_REJ
, sizeof(rej
), &rej
);
3096 static int l2cap_check_fcs(struct l2cap_pinfo
*pi
, struct sk_buff
*skb
)
3098 u16 our_fcs
, rcv_fcs
;
3099 int hdr_size
= L2CAP_HDR_SIZE
+ 2;
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
);
3106 if (our_fcs
!= rcv_fcs
)
3112 static void l2cap_add_to_srej_queue(struct sock
*sk
, struct sk_buff
*skb
, u8 tx_seq
, u8 sar
)
3114 struct sk_buff
*next_skb
;
3116 bt_cb(skb
)->tx_seq
= tx_seq
;
3117 bt_cb(skb
)->sar
= sar
;
3119 next_skb
= skb_peek(SREJ_QUEUE(sk
));
3121 __skb_queue_tail(SREJ_QUEUE(sk
), skb
);
3126 if (bt_cb(next_skb
)->tx_seq
> tx_seq
) {
3127 __skb_queue_before(SREJ_QUEUE(sk
), next_skb
, skb
);
3131 if (skb_queue_is_last(SREJ_QUEUE(sk
), next_skb
))
3134 } while((next_skb
= skb_queue_next(SREJ_QUEUE(sk
), next_skb
)));
3136 __skb_queue_tail(SREJ_QUEUE(sk
), skb
);
3139 static int l2cap_sar_reassembly_sdu(struct sock
*sk
, struct sk_buff
*skb
, u16 control
)
3141 struct l2cap_pinfo
*pi
= l2cap_pi(sk
);
3142 struct sk_buff
*_skb
;
3145 switch (control
& L2CAP_CTRL_SAR
) {
3146 case L2CAP_SDU_UNSEGMENTED
:
3147 if (pi
->conn_state
& L2CAP_CONN_SAR_SDU
) {
3152 err
= sock_queue_rcv_skb(sk
, skb
);
3158 case L2CAP_SDU_START
:
3159 if (pi
->conn_state
& L2CAP_CONN_SAR_SDU
) {
3164 pi
->sdu_len
= get_unaligned_le16(skb
->data
);
3167 pi
->sdu
= bt_skb_alloc(pi
->sdu_len
, GFP_ATOMIC
);
3173 memcpy(skb_put(pi
->sdu
, skb
->len
), skb
->data
, skb
->len
);
3175 pi
->conn_state
|= L2CAP_CONN_SAR_SDU
;
3176 pi
->partial_sdu_len
= skb
->len
;
3180 case L2CAP_SDU_CONTINUE
:
3181 if (!(pi
->conn_state
& L2CAP_CONN_SAR_SDU
))
3184 memcpy(skb_put(pi
->sdu
, skb
->len
), skb
->data
, skb
->len
);
3186 pi
->partial_sdu_len
+= skb
->len
;
3187 if (pi
->partial_sdu_len
> pi
->sdu_len
)
3195 if (!(pi
->conn_state
& L2CAP_CONN_SAR_SDU
))
3198 memcpy(skb_put(pi
->sdu
, skb
->len
), skb
->data
, skb
->len
);
3200 pi
->conn_state
&= ~L2CAP_CONN_SAR_SDU
;
3201 pi
->partial_sdu_len
+= skb
->len
;
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
);
3219 static void l2cap_check_srej_gap(struct sock
*sk
, u8 tx_seq
)
3221 struct sk_buff
*skb
;
3224 while((skb
= skb_peek(SREJ_QUEUE(sk
)))) {
3225 if (bt_cb(skb
)->tx_seq
!= tx_seq
)
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;
3237 static void l2cap_resend_srejframe(struct sock
*sk
, u8 tx_seq
)
3239 struct l2cap_pinfo
*pi
= l2cap_pi(sk
);
3240 struct srej_list
*l
, *tmp
;
3243 list_for_each_entry_safe(l
,tmp
, SREJ_LIST(sk
), list
) {
3244 if (l
->tx_seq
== tx_seq
) {
3249 control
= L2CAP_SUPER_SELECT_REJECT
;
3250 control
|= l
->tx_seq
<< L2CAP_CTRL_REQSEQ_SHIFT
;
3251 l2cap_send_sframe(pi
, control
);
3253 list_add_tail(&l
->list
, SREJ_LIST(sk
));
3257 static void l2cap_send_srejframe(struct sock
*sk
, u8 tx_seq
)
3259 struct l2cap_pinfo
*pi
= l2cap_pi(sk
);
3260 struct srej_list
*new;
3263 while (tx_seq
!= pi
->expected_tx_seq
) {
3264 control
= L2CAP_SUPER_SELECT_REJECT
;
3265 control
|= pi
->expected_tx_seq
<< L2CAP_CTRL_REQSEQ_SHIFT
;
3266 if (pi
->conn_state
& L2CAP_CONN_SEND_PBIT
) {
3267 control
|= L2CAP_CTRL_POLL
;
3268 pi
->conn_state
&= ~L2CAP_CONN_SEND_PBIT
;
3270 l2cap_send_sframe(pi
, control
);
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
));
3276 pi
->expected_tx_seq
++;
3279 static inline int l2cap_data_channel_iframe(struct sock
*sk
, u16 rx_control
, struct sk_buff
*skb
)
3281 struct l2cap_pinfo
*pi
= l2cap_pi(sk
);
3282 u8 tx_seq
= __get_txseq(rx_control
);
3284 u8 sar
= rx_control
>> L2CAP_CTRL_SAR_SHIFT
;
3287 BT_DBG("sk %p rx_control 0x%4.4x len %d", sk
, rx_control
, skb
->len
);
3289 if (tx_seq
== pi
->expected_tx_seq
)
3292 if (pi
->conn_state
& L2CAP_CONN_SREJ_SENT
) {
3293 struct srej_list
*first
;
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
);
3301 list_del(&first
->list
);
3304 if (list_empty(SREJ_LIST(sk
))) {
3305 pi
->buffer_seq
= pi
->buffer_seq_srej
;
3306 pi
->conn_state
&= ~L2CAP_CONN_SREJ_SENT
;
3309 struct srej_list
*l
;
3310 l2cap_add_to_srej_queue(sk
, skb
, tx_seq
, sar
);
3312 list_for_each_entry(l
, SREJ_LIST(sk
), list
) {
3313 if (l
->tx_seq
== tx_seq
) {
3314 l2cap_resend_srejframe(sk
, tx_seq
);
3318 l2cap_send_srejframe(sk
, tx_seq
);
3321 pi
->conn_state
|= L2CAP_CONN_SREJ_SENT
;
3323 INIT_LIST_HEAD(SREJ_LIST(sk
));
3324 pi
->buffer_seq_srej
= pi
->buffer_seq
;
3326 __skb_queue_head_init(SREJ_QUEUE(sk
));
3327 l2cap_add_to_srej_queue(sk
, skb
, tx_seq
, sar
);
3329 pi
->conn_state
|= L2CAP_CONN_SEND_PBIT
;
3331 l2cap_send_srejframe(sk
, tx_seq
);
3336 pi
->expected_tx_seq
= (pi
->expected_tx_seq
+ 1) % 64;
3338 if (pi
->conn_state
& L2CAP_CONN_SREJ_SENT
) {
3339 l2cap_add_to_srej_queue(sk
, skb
, tx_seq
, sar
);
3343 pi
->buffer_seq
= (pi
->buffer_seq
+ 1) % 64;
3345 err
= l2cap_sar_reassembly_sdu(sk
, skb
, rx_control
);
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
);
3358 static inline int l2cap_data_channel_sframe(struct sock
*sk
, u16 rx_control
, struct sk_buff
*skb
)
3360 struct l2cap_pinfo
*pi
= l2cap_pi(sk
);
3361 u8 tx_seq
= __get_reqseq(rx_control
);
3363 BT_DBG("sk %p rx_control 0x%4.4x len %d", sk
, rx_control
, skb
->len
);
3365 switch (rx_control
& L2CAP_CTRL_SUPERVISE
) {
3366 case L2CAP_SUPER_RCV_READY
:
3367 if (rx_control
& L2CAP_CTRL_POLL
) {
3368 u16 control
= L2CAP_CTRL_FINAL
;
3369 control
|= L2CAP_SUPER_RCV_READY
|
3370 (pi
->buffer_seq
<< L2CAP_CTRL_REQSEQ_SHIFT
);
3371 l2cap_send_sframe(l2cap_pi(sk
), control
);
3372 pi
->conn_state
&= ~L2CAP_CONN_REMOTE_BUSY
;
3374 } else if (rx_control
& L2CAP_CTRL_FINAL
) {
3375 pi
->conn_state
&= ~L2CAP_CONN_REMOTE_BUSY
;
3376 pi
->expected_ack_seq
= tx_seq
;
3377 l2cap_drop_acked_frames(sk
);
3379 if (!(pi
->conn_state
& L2CAP_CONN_WAIT_F
))
3382 pi
->conn_state
&= ~L2CAP_CONN_WAIT_F
;
3383 del_timer(&pi
->monitor_timer
);
3385 if (pi
->unacked_frames
> 0)
3386 __mod_retrans_timer();
3388 pi
->expected_ack_seq
= tx_seq
;
3389 l2cap_drop_acked_frames(sk
);
3391 if ((pi
->conn_state
& L2CAP_CONN_REMOTE_BUSY
)
3392 && (pi
->unacked_frames
> 0))
3393 __mod_retrans_timer();
3395 l2cap_ertm_send(sk
);
3396 pi
->conn_state
&= ~L2CAP_CONN_REMOTE_BUSY
;
3400 case L2CAP_SUPER_REJECT
:
3401 pi
->conn_state
&= ~L2CAP_CONN_REMOTE_BUSY
;
3403 pi
->expected_ack_seq
= __get_reqseq(rx_control
);
3404 l2cap_drop_acked_frames(sk
);
3406 sk
->sk_send_head
= TX_QUEUE(sk
)->next
;
3407 pi
->next_tx_seq
= pi
->expected_ack_seq
;
3409 l2cap_ertm_send(sk
);
3413 case L2CAP_SUPER_SELECT_REJECT
:
3414 pi
->conn_state
&= ~L2CAP_CONN_REMOTE_BUSY
;
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
;
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
;
3430 l2cap_retransmit_frame(sk
, tx_seq
);
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
;
3441 case L2CAP_SUPER_RCV_NOT_READY
:
3442 pi
->conn_state
|= L2CAP_CONN_REMOTE_BUSY
;
3443 pi
->expected_ack_seq
= tx_seq
;
3444 l2cap_drop_acked_frames(sk
);
3446 del_timer(&l2cap_pi(sk
)->retrans_timer
);
3447 if (rx_control
& L2CAP_CTRL_POLL
) {
3448 u16 control
= L2CAP_CTRL_FINAL
;
3449 l2cap_send_rr_or_rnr(l2cap_pi(sk
), control
);
3457 static inline int l2cap_data_channel(struct l2cap_conn
*conn
, u16 cid
, struct sk_buff
*skb
)
3460 struct l2cap_pinfo
*pi
;
3465 sk
= l2cap_get_chan_by_scid(&conn
->chan_list
, cid
);
3467 BT_DBG("unknown cid 0x%4.4x", cid
);
3473 BT_DBG("sk %p, len %d", sk
, skb
->len
);
3475 if (sk
->sk_state
!= BT_CONNECTED
)
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. */
3485 if (pi
->imtu
< skb
->len
)
3488 if (!sock_queue_rcv_skb(sk
, skb
))
3492 case L2CAP_MODE_ERTM
:
3493 control
= get_unaligned_le16(skb
->data
);
3497 if (__is_sar_start(control
))
3500 if (pi
->fcs
== L2CAP_FCS_CRC16
)
3504 * We can just drop the corrupted I-frame here.
3505 * Receiver will miss it and start proper recovery
3506 * procedures and ask retransmission.
3508 if (len
> L2CAP_DEFAULT_MAX_PDU_SIZE
)
3511 if (l2cap_check_fcs(pi
, skb
))
3514 if (__is_iframe(control
))
3515 err
= l2cap_data_channel_iframe(sk
, control
, skb
);
3517 err
= l2cap_data_channel_sframe(sk
, control
, skb
);
3523 case L2CAP_MODE_STREAMING
:
3524 control
= get_unaligned_le16(skb
->data
);
3528 if (__is_sar_start(control
))
3531 if (pi
->fcs
== L2CAP_FCS_CRC16
)
3534 if (len
> L2CAP_DEFAULT_MAX_PDU_SIZE
|| __is_sframe(control
))
3537 if (l2cap_check_fcs(pi
, skb
))
3540 tx_seq
= __get_txseq(control
);
3542 if (pi
->expected_tx_seq
== tx_seq
)
3543 pi
->expected_tx_seq
= (pi
->expected_tx_seq
+ 1) % 64;
3545 pi
->expected_tx_seq
= tx_seq
+ 1;
3547 err
= l2cap_sar_reassembly_sdu(sk
, skb
, control
);
3552 BT_DBG("sk %p: bad mode 0x%2.2x", sk
, l2cap_pi(sk
)->mode
);
3566 static inline int l2cap_conless_channel(struct l2cap_conn
*conn
, __le16 psm
, struct sk_buff
*skb
)
3570 sk
= l2cap_get_sock_by_psm(0, psm
, conn
->src
);
3574 BT_DBG("sk %p, len %d", sk
, skb
->len
);
3576 if (sk
->sk_state
!= BT_BOUND
&& sk
->sk_state
!= BT_CONNECTED
)
3579 if (l2cap_pi(sk
)->imtu
< skb
->len
)
3582 if (!sock_queue_rcv_skb(sk
, skb
))
3594 static void l2cap_recv_frame(struct l2cap_conn
*conn
, struct sk_buff
*skb
)
3596 struct l2cap_hdr
*lh
= (void *) skb
->data
;
3600 skb_pull(skb
, L2CAP_HDR_SIZE
);
3601 cid
= __le16_to_cpu(lh
->cid
);
3602 len
= __le16_to_cpu(lh
->len
);
3604 if (len
!= skb
->len
) {
3609 BT_DBG("len %d, cid 0x%4.4x", len
, cid
);
3612 case L2CAP_CID_SIGNALING
:
3613 l2cap_sig_channel(conn
, skb
);
3616 case L2CAP_CID_CONN_LESS
:
3617 psm
= get_unaligned_le16(skb
->data
);
3619 l2cap_conless_channel(conn
, psm
, skb
);
3623 l2cap_data_channel(conn
, cid
, skb
);
3628 /* ---- L2CAP interface with lower layer (HCI) ---- */
3630 static int l2cap_connect_ind(struct hci_dev
*hdev
, bdaddr_t
*bdaddr
, u8 type
)
3632 int exact
= 0, lm1
= 0, lm2
= 0;
3633 register struct sock
*sk
;
3634 struct hlist_node
*node
;
3636 if (type
!= ACL_LINK
)
3639 BT_DBG("hdev %s, bdaddr %s", hdev
->name
, batostr(bdaddr
));
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
)
3647 if (!bacmp(&bt_sk(sk
)->src
, &hdev
->bdaddr
)) {
3648 lm1
|= HCI_LM_ACCEPT
;
3649 if (l2cap_pi(sk
)->role_switch
)
3650 lm1
|= HCI_LM_MASTER
;
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
;
3658 read_unlock(&l2cap_sk_list
.lock
);
3660 return exact
? lm1
: lm2
;
3663 static int l2cap_connect_cfm(struct hci_conn
*hcon
, u8 status
)
3665 struct l2cap_conn
*conn
;
3667 BT_DBG("hcon %p bdaddr %s status %d", hcon
, batostr(&hcon
->dst
), status
);
3669 if (hcon
->type
!= ACL_LINK
)
3673 conn
= l2cap_conn_add(hcon
, status
);
3675 l2cap_conn_ready(conn
);
3677 l2cap_conn_del(hcon
, bt_err(status
));
3682 static int l2cap_disconn_ind(struct hci_conn
*hcon
)
3684 struct l2cap_conn
*conn
= hcon
->l2cap_data
;
3686 BT_DBG("hcon %p", hcon
);
3688 if (hcon
->type
!= ACL_LINK
|| !conn
)
3691 return conn
->disc_reason
;
3694 static int l2cap_disconn_cfm(struct hci_conn
*hcon
, u8 reason
)
3696 BT_DBG("hcon %p reason %d", hcon
, reason
);
3698 if (hcon
->type
!= ACL_LINK
)
3701 l2cap_conn_del(hcon
, bt_err(reason
));
3706 static inline void l2cap_check_encryption(struct sock
*sk
, u8 encrypt
)
3708 if (sk
->sk_type
!= SOCK_SEQPACKET
)
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
);
3718 if (l2cap_pi(sk
)->sec_level
== BT_SECURITY_MEDIUM
)
3719 l2cap_sock_clear_timer(sk
);
3723 static int l2cap_security_cfm(struct hci_conn
*hcon
, u8 status
, u8 encrypt
)
3725 struct l2cap_chan_list
*l
;
3726 struct l2cap_conn
*conn
= hcon
->l2cap_data
;
3732 l
= &conn
->chan_list
;
3734 BT_DBG("conn %p", conn
);
3736 read_lock(&l
->lock
);
3738 for (sk
= l
->head
; sk
; sk
= l2cap_pi(sk
)->next_c
) {
3741 if (l2cap_pi(sk
)->conf_state
& L2CAP_CONF_CONNECT_PEND
) {
3746 if (!status
&& (sk
->sk_state
== BT_CONNECTED
||
3747 sk
->sk_state
== BT_CONFIG
)) {
3748 l2cap_check_encryption(sk
, encrypt
);
3753 if (sk
->sk_state
== BT_CONNECT
) {
3755 struct l2cap_conn_req req
;
3756 req
.scid
= cpu_to_le16(l2cap_pi(sk
)->scid
);
3757 req
.psm
= l2cap_pi(sk
)->psm
;
3759 l2cap_pi(sk
)->ident
= l2cap_get_ident(conn
);
3761 l2cap_send_cmd(conn
, l2cap_pi(sk
)->ident
,
3762 L2CAP_CONN_REQ
, sizeof(req
), &req
);
3764 l2cap_sock_clear_timer(sk
);
3765 l2cap_sock_set_timer(sk
, HZ
/ 10);
3767 } else if (sk
->sk_state
== BT_CONNECT2
) {
3768 struct l2cap_conn_rsp rsp
;
3772 sk
->sk_state
= BT_CONFIG
;
3773 result
= L2CAP_CR_SUCCESS
;
3775 sk
->sk_state
= BT_DISCONN
;
3776 l2cap_sock_set_timer(sk
, HZ
/ 10);
3777 result
= L2CAP_CR_SEC_BLOCK
;
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
);
3783 rsp
.status
= cpu_to_le16(L2CAP_CS_NO_INFO
);
3784 l2cap_send_cmd(conn
, l2cap_pi(sk
)->ident
,
3785 L2CAP_CONN_RSP
, sizeof(rsp
), &rsp
);
3791 read_unlock(&l
->lock
);
3796 static int l2cap_recv_acldata(struct hci_conn
*hcon
, struct sk_buff
*skb
, u16 flags
)
3798 struct l2cap_conn
*conn
= hcon
->l2cap_data
;
3800 if (!conn
&& !(conn
= l2cap_conn_add(hcon
, 0)))
3803 BT_DBG("conn %p len %d flags 0x%x", conn
, skb
->len
, flags
);
3805 if (flags
& ACL_START
) {
3806 struct l2cap_hdr
*hdr
;
3810 BT_ERR("Unexpected start frame (len %d)", skb
->len
);
3811 kfree_skb(conn
->rx_skb
);
3812 conn
->rx_skb
= NULL
;
3814 l2cap_conn_unreliable(conn
, ECOMM
);
3818 BT_ERR("Frame is too short (len %d)", skb
->len
);
3819 l2cap_conn_unreliable(conn
, ECOMM
);
3823 hdr
= (struct l2cap_hdr
*) skb
->data
;
3824 len
= __le16_to_cpu(hdr
->len
) + L2CAP_HDR_SIZE
;
3826 if (len
== skb
->len
) {
3827 /* Complete frame received */
3828 l2cap_recv_frame(conn
, skb
);
3832 BT_DBG("Start: total len %d, frag len %d", len
, skb
->len
);
3834 if (skb
->len
> len
) {
3835 BT_ERR("Frame is too long (len %d, expected len %d)",
3837 l2cap_conn_unreliable(conn
, ECOMM
);
3841 /* Allocate skb for the complete frame (with header) */
3842 conn
->rx_skb
= bt_skb_alloc(len
, GFP_ATOMIC
);
3846 skb_copy_from_linear_data(skb
, skb_put(conn
->rx_skb
, skb
->len
),
3848 conn
->rx_len
= len
- skb
->len
;
3850 BT_DBG("Cont: frag len %d (expecting %d)", skb
->len
, conn
->rx_len
);
3852 if (!conn
->rx_len
) {
3853 BT_ERR("Unexpected continuation frame (len %d)", skb
->len
);
3854 l2cap_conn_unreliable(conn
, ECOMM
);
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
;
3864 l2cap_conn_unreliable(conn
, ECOMM
);
3868 skb_copy_from_linear_data(skb
, skb_put(conn
->rx_skb
, skb
->len
),
3870 conn
->rx_len
-= skb
->len
;
3872 if (!conn
->rx_len
) {
3873 /* Complete frame received */
3874 l2cap_recv_frame(conn
, conn
->rx_skb
);
3875 conn
->rx_skb
= NULL
;
3884 static ssize_t
l2cap_sysfs_show(struct class *dev
, char *buf
)
3887 struct hlist_node
*node
;
3890 read_lock_bh(&l2cap_sk_list
.lock
);
3892 sk_for_each(sk
, node
, &l2cap_sk_list
.head
) {
3893 struct l2cap_pinfo
*pi
= l2cap_pi(sk
);
3895 str
+= sprintf(str
, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d %d\n",
3896 batostr(&bt_sk(sk
)->src
), batostr(&bt_sk(sk
)->dst
),
3897 sk
->sk_state
, __le16_to_cpu(pi
->psm
), pi
->scid
,
3898 pi
->dcid
, pi
->imtu
, pi
->omtu
, pi
->sec_level
);
3901 read_unlock_bh(&l2cap_sk_list
.lock
);
3906 static CLASS_ATTR(l2cap
, S_IRUGO
, l2cap_sysfs_show
, NULL
);
3908 static const struct proto_ops l2cap_sock_ops
= {
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
,
3918 .recvmsg
= l2cap_sock_recvmsg
,
3919 .poll
= bt_sock_poll
,
3920 .ioctl
= bt_sock_ioctl
,
3921 .mmap
= sock_no_mmap
,
3922 .socketpair
= sock_no_socketpair
,
3923 .shutdown
= l2cap_sock_shutdown
,
3924 .setsockopt
= l2cap_sock_setsockopt
,
3925 .getsockopt
= l2cap_sock_getsockopt
3928 static const struct net_proto_family l2cap_sock_family_ops
= {
3929 .family
= PF_BLUETOOTH
,
3930 .owner
= THIS_MODULE
,
3931 .create
= l2cap_sock_create
,
3934 static struct hci_proto l2cap_hci_proto
= {
3936 .id
= HCI_PROTO_L2CAP
,
3937 .connect_ind
= l2cap_connect_ind
,
3938 .connect_cfm
= l2cap_connect_cfm
,
3939 .disconn_ind
= l2cap_disconn_ind
,
3940 .disconn_cfm
= l2cap_disconn_cfm
,
3941 .security_cfm
= l2cap_security_cfm
,
3942 .recv_acldata
= l2cap_recv_acldata
3945 static int __init
l2cap_init(void)
3949 err
= proto_register(&l2cap_proto
, 0);
3953 err
= bt_sock_register(BTPROTO_L2CAP
, &l2cap_sock_family_ops
);
3955 BT_ERR("L2CAP socket registration failed");
3959 err
= hci_register_proto(&l2cap_hci_proto
);
3961 BT_ERR("L2CAP protocol registration failed");
3962 bt_sock_unregister(BTPROTO_L2CAP
);
3966 if (class_create_file(bt_class
, &class_attr_l2cap
) < 0)
3967 BT_ERR("Failed to create L2CAP info file");
3969 BT_INFO("L2CAP ver %s", VERSION
);
3970 BT_INFO("L2CAP socket layer initialized");
3975 proto_unregister(&l2cap_proto
);
3979 static void __exit
l2cap_exit(void)
3981 class_remove_file(bt_class
, &class_attr_l2cap
);
3983 if (bt_sock_unregister(BTPROTO_L2CAP
) < 0)
3984 BT_ERR("L2CAP socket unregistration failed");
3986 if (hci_unregister_proto(&l2cap_hci_proto
) < 0)
3987 BT_ERR("L2CAP protocol unregistration failed");
3989 proto_unregister(&l2cap_proto
);
3992 void l2cap_load(void)
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. */
3999 EXPORT_SYMBOL(l2cap_load
);
4001 module_init(l2cap_init
);
4002 module_exit(l2cap_exit
);
4004 module_param(enable_ertm
, bool, 0644);
4005 MODULE_PARM_DESC(enable_ertm
, "Enable enhanced retransmission mode");
4007 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
4008 MODULE_DESCRIPTION("Bluetooth L2CAP ver " VERSION
);
4009 MODULE_VERSION(VERSION
);
4010 MODULE_LICENSE("GPL");
4011 MODULE_ALIAS("bt-proto-0");