diff options
Diffstat (limited to 'net/bluetooth/l2cap_sock.c')
| -rw-r--r-- | net/bluetooth/l2cap_sock.c | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c new file mode 100644 index 00000000000..6ea1894cecb --- /dev/null +++ b/net/bluetooth/l2cap_sock.c @@ -0,0 +1,213 @@ +/* + BlueZ - Bluetooth protocol stack for Linux + Copyright (C) 2000-2001 Qualcomm Incorporated + Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org> + Copyright (C) 2010 Google Inc. + + Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License version 2 as + published by the Free Software Foundation; + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. + IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY + CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES + WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + + ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, + COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS + SOFTWARE IS DISCLAIMED. +*/ + +/* Bluetooth L2CAP sockets. */ + +#include <net/bluetooth/bluetooth.h> +#include <net/bluetooth/l2cap.h> + +static void l2cap_sock_timeout(unsigned long arg) +{ + struct sock *sk = (struct sock *) arg; + int reason; + + BT_DBG("sock %p state %d", sk, sk->sk_state); + + bh_lock_sock(sk); + + if (sock_owned_by_user(sk)) { + /* sk is owned by user. Try again later */ + l2cap_sock_set_timer(sk, HZ / 5); + bh_unlock_sock(sk); + sock_put(sk); + return; + } + + if (sk->sk_state == BT_CONNECTED || sk->sk_state == BT_CONFIG) + reason = ECONNREFUSED; + else if (sk->sk_state == BT_CONNECT && + l2cap_pi(sk)->sec_level != BT_SECURITY_SDP) + reason = ECONNREFUSED; + else + reason = ETIMEDOUT; + + __l2cap_sock_close(sk, reason); + + bh_unlock_sock(sk); + + l2cap_sock_kill(sk); + sock_put(sk); +} + + +static void l2cap_sock_destruct(struct sock *sk) +{ + BT_DBG("sk %p", sk); + + skb_queue_purge(&sk->sk_receive_queue); + skb_queue_purge(&sk->sk_write_queue); +} + +void l2cap_sock_init(struct sock *sk, struct sock *parent) +{ + struct l2cap_pinfo *pi = l2cap_pi(sk); + + BT_DBG("sk %p", sk); + + if (parent) { + sk->sk_type = parent->sk_type; + bt_sk(sk)->defer_setup = bt_sk(parent)->defer_setup; + + pi->imtu = l2cap_pi(parent)->imtu; + pi->omtu = l2cap_pi(parent)->omtu; + pi->conf_state = l2cap_pi(parent)->conf_state; + pi->mode = l2cap_pi(parent)->mode; + pi->fcs = l2cap_pi(parent)->fcs; + pi->max_tx = l2cap_pi(parent)->max_tx; + pi->tx_win = l2cap_pi(parent)->tx_win; + pi->sec_level = l2cap_pi(parent)->sec_level; + pi->role_switch = l2cap_pi(parent)->role_switch; + pi->force_reliable = l2cap_pi(parent)->force_reliable; + pi->flushable = l2cap_pi(parent)->flushable; + } else { + pi->imtu = L2CAP_DEFAULT_MTU; + pi->omtu = 0; + if (!disable_ertm && sk->sk_type == SOCK_STREAM) { + pi->mode = L2CAP_MODE_ERTM; + pi->conf_state |= L2CAP_CONF_STATE2_DEVICE; + } else { + pi->mode = L2CAP_MODE_BASIC; + } + pi->max_tx = L2CAP_DEFAULT_MAX_TX; + pi->fcs = L2CAP_FCS_CRC16; + pi->tx_win = L2CAP_DEFAULT_TX_WINDOW; + pi->sec_level = BT_SECURITY_LOW; + pi->role_switch = 0; + pi->force_reliable = 0; + pi->flushable = BT_FLUSHABLE_OFF; + } + + /* Default config options */ + pi->conf_len = 0; + pi->flush_to = L2CAP_DEFAULT_FLUSH_TO; + skb_queue_head_init(TX_QUEUE(sk)); + skb_queue_head_init(SREJ_QUEUE(sk)); + skb_queue_head_init(BUSY_QUEUE(sk)); + INIT_LIST_HEAD(SREJ_LIST(sk)); +} + +static struct proto l2cap_proto = { + .name = "L2CAP", + .owner = THIS_MODULE, + .obj_size = sizeof(struct l2cap_pinfo) +}; + +struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) +{ + struct sock *sk; + + sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto); + if (!sk) + return NULL; + + sock_init_data(sock, sk); + INIT_LIST_HEAD(&bt_sk(sk)->accept_q); + + sk->sk_destruct = l2cap_sock_destruct; + sk->sk_sndtimeo = msecs_to_jiffies(L2CAP_CONN_TIMEOUT); + + sock_reset_flag(sk, SOCK_ZAPPED); + + sk->sk_protocol = proto; + sk->sk_state = BT_OPEN; + + setup_timer(&sk->sk_timer, l2cap_sock_timeout, (unsigned long) sk); + + bt_sock_link(&l2cap_sk_list, sk); + return sk; +} + +static int l2cap_sock_create(struct net *net, struct socket *sock, int protocol, + int kern) +{ + struct sock *sk; + + BT_DBG("sock %p", sock); + + sock->state = SS_UNCONNECTED; + + if (sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM && + sock->type != SOCK_DGRAM && sock->type != SOCK_RAW) + return -ESOCKTNOSUPPORT; + + if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) + return -EPERM; + + sock->ops = &l2cap_sock_ops; + + sk = l2cap_sock_alloc(net, sock, protocol, GFP_ATOMIC); + if (!sk) + return -ENOMEM; + + l2cap_sock_init(sk, NULL); + return 0; +} + +static const struct net_proto_family l2cap_sock_family_ops = { + .family = PF_BLUETOOTH, + .owner = THIS_MODULE, + .create = l2cap_sock_create, +}; + +int __init l2cap_init_sockets(void) +{ + int err; + + err = proto_register(&l2cap_proto, 0); + if (err < 0) + return err; + + err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); + if (err < 0) + goto error; + + BT_INFO("L2CAP socket layer initialized"); + + return 0; + +error: + BT_ERR("L2CAP socket registration failed"); + proto_unregister(&l2cap_proto); + return err; +} + +void l2cap_cleanup_sockets(void) +{ + if (bt_sock_unregister(BTPROTO_L2CAP) < 0) + BT_ERR("L2CAP socket unregistration failed"); + + proto_unregister(&l2cap_proto); +} |