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/l2cap.h>
32 static void l2cap_sock_timeout(unsigned long arg
)
34 struct sock
*sk
= (struct sock
*) arg
;
37 BT_DBG("sock %p state %d", sk
, sk
->sk_state
);
41 if (sock_owned_by_user(sk
)) {
42 /* sk is owned by user. Try again later */
43 l2cap_sock_set_timer(sk
, HZ
/ 5);
49 if (sk
->sk_state
== BT_CONNECTED
|| sk
->sk_state
== BT_CONFIG
)
50 reason
= ECONNREFUSED
;
51 else if (sk
->sk_state
== BT_CONNECT
&&
52 l2cap_pi(sk
)->sec_level
!= BT_SECURITY_SDP
)
53 reason
= ECONNREFUSED
;
57 __l2cap_sock_close(sk
, reason
);
66 static void l2cap_sock_destruct(struct sock
*sk
)
70 skb_queue_purge(&sk
->sk_receive_queue
);
71 skb_queue_purge(&sk
->sk_write_queue
);
74 void l2cap_sock_init(struct sock
*sk
, struct sock
*parent
)
76 struct l2cap_pinfo
*pi
= l2cap_pi(sk
);
81 sk
->sk_type
= parent
->sk_type
;
82 bt_sk(sk
)->defer_setup
= bt_sk(parent
)->defer_setup
;
84 pi
->imtu
= l2cap_pi(parent
)->imtu
;
85 pi
->omtu
= l2cap_pi(parent
)->omtu
;
86 pi
->conf_state
= l2cap_pi(parent
)->conf_state
;
87 pi
->mode
= l2cap_pi(parent
)->mode
;
88 pi
->fcs
= l2cap_pi(parent
)->fcs
;
89 pi
->max_tx
= l2cap_pi(parent
)->max_tx
;
90 pi
->tx_win
= l2cap_pi(parent
)->tx_win
;
91 pi
->sec_level
= l2cap_pi(parent
)->sec_level
;
92 pi
->role_switch
= l2cap_pi(parent
)->role_switch
;
93 pi
->force_reliable
= l2cap_pi(parent
)->force_reliable
;
94 pi
->flushable
= l2cap_pi(parent
)->flushable
;
96 pi
->imtu
= L2CAP_DEFAULT_MTU
;
98 if (!disable_ertm
&& sk
->sk_type
== SOCK_STREAM
) {
99 pi
->mode
= L2CAP_MODE_ERTM
;
100 pi
->conf_state
|= L2CAP_CONF_STATE2_DEVICE
;
102 pi
->mode
= L2CAP_MODE_BASIC
;
104 pi
->max_tx
= L2CAP_DEFAULT_MAX_TX
;
105 pi
->fcs
= L2CAP_FCS_CRC16
;
106 pi
->tx_win
= L2CAP_DEFAULT_TX_WINDOW
;
107 pi
->sec_level
= BT_SECURITY_LOW
;
109 pi
->force_reliable
= 0;
110 pi
->flushable
= BT_FLUSHABLE_OFF
;
113 /* Default config options */
115 pi
->flush_to
= L2CAP_DEFAULT_FLUSH_TO
;
116 skb_queue_head_init(TX_QUEUE(sk
));
117 skb_queue_head_init(SREJ_QUEUE(sk
));
118 skb_queue_head_init(BUSY_QUEUE(sk
));
119 INIT_LIST_HEAD(SREJ_LIST(sk
));
122 static struct proto l2cap_proto
= {
124 .owner
= THIS_MODULE
,
125 .obj_size
= sizeof(struct l2cap_pinfo
)
128 struct sock
*l2cap_sock_alloc(struct net
*net
, struct socket
*sock
, int proto
, gfp_t prio
)
132 sk
= sk_alloc(net
, PF_BLUETOOTH
, prio
, &l2cap_proto
);
136 sock_init_data(sock
, sk
);
137 INIT_LIST_HEAD(&bt_sk(sk
)->accept_q
);
139 sk
->sk_destruct
= l2cap_sock_destruct
;
140 sk
->sk_sndtimeo
= msecs_to_jiffies(L2CAP_CONN_TIMEOUT
);
142 sock_reset_flag(sk
, SOCK_ZAPPED
);
144 sk
->sk_protocol
= proto
;
145 sk
->sk_state
= BT_OPEN
;
147 setup_timer(&sk
->sk_timer
, l2cap_sock_timeout
, (unsigned long) sk
);
149 bt_sock_link(&l2cap_sk_list
, sk
);
153 static int l2cap_sock_create(struct net
*net
, struct socket
*sock
, int protocol
,
158 BT_DBG("sock %p", sock
);
160 sock
->state
= SS_UNCONNECTED
;
162 if (sock
->type
!= SOCK_SEQPACKET
&& sock
->type
!= SOCK_STREAM
&&
163 sock
->type
!= SOCK_DGRAM
&& sock
->type
!= SOCK_RAW
)
164 return -ESOCKTNOSUPPORT
;
166 if (sock
->type
== SOCK_RAW
&& !kern
&& !capable(CAP_NET_RAW
))
169 sock
->ops
= &l2cap_sock_ops
;
171 sk
= l2cap_sock_alloc(net
, sock
, protocol
, GFP_ATOMIC
);
175 l2cap_sock_init(sk
, NULL
);
179 static const struct net_proto_family l2cap_sock_family_ops
= {
180 .family
= PF_BLUETOOTH
,
181 .owner
= THIS_MODULE
,
182 .create
= l2cap_sock_create
,
185 int __init
l2cap_init_sockets(void)
189 err
= proto_register(&l2cap_proto
, 0);
193 err
= bt_sock_register(BTPROTO_L2CAP
, &l2cap_sock_family_ops
);
197 BT_INFO("L2CAP socket layer initialized");
202 BT_ERR("L2CAP socket registration failed");
203 proto_unregister(&l2cap_proto
);
207 void l2cap_cleanup_sockets(void)
209 if (bt_sock_unregister(BTPROTO_L2CAP
) < 0)
210 BT_ERR("L2CAP socket unregistration failed");
212 proto_unregister(&l2cap_proto
);