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net/bluetooth/l2cap_sock.c
23.1 KB
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/* 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. |
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Copyright (C) 2011 ProFUSION Embedded Systems |
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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. */ |
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#include <linux/security.h> |
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#include <linux/export.h> |
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|
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#include <net/bluetooth/bluetooth.h> |
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#include <net/bluetooth/hci_core.h> |
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#include <net/bluetooth/l2cap.h> |
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#include <net/bluetooth/smp.h> |
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static const struct proto_ops l2cap_sock_ops; |
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static void l2cap_sock_init(struct sock *sk, struct sock *parent); static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio); |
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static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) { struct sock *sk = sock->sk; |
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struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
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struct sockaddr_l2 la; int len, err = 0; BT_DBG("sk %p", sk); if (!addr || addr->sa_family != AF_BLUETOOTH) return -EINVAL; memset(&la, 0, sizeof(la)); len = min_t(unsigned int, sizeof(la), alen); memcpy(&la, addr, len); |
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if (la.l2_cid && la.l2_psm) |
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return -EINVAL; lock_sock(sk); if (sk->sk_state != BT_OPEN) { err = -EBADFD; goto done; } if (la.l2_psm) { __u16 psm = __le16_to_cpu(la.l2_psm); /* PSM must be odd and lsb of upper byte must be 0 */ if ((psm & 0x0101) != 0x0001) { err = -EINVAL; goto done; } /* Restrict usage of well-known PSMs */ if (psm < 0x1001 && !capable(CAP_NET_BIND_SERVICE)) { err = -EACCES; goto done; } } |
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if (la.l2_cid) err = l2cap_add_scid(chan, la.l2_cid); else err = l2cap_add_psm(chan, &la.l2_bdaddr, la.l2_psm); |
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if (err < 0) goto done; |
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if (__le16_to_cpu(la.l2_psm) == 0x0001 || __le16_to_cpu(la.l2_psm) == 0x0003) chan->sec_level = BT_SECURITY_SDP; |
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|
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bacpy(&bt_sk(sk)->src, &la.l2_bdaddr); |
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chan->state = BT_BOUND; |
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sk->sk_state = BT_BOUND; |
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done: release_sock(sk); return err; } |
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static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) { struct sock *sk = sock->sk; |
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struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
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struct sockaddr_l2 la; int len, err = 0; BT_DBG("sk %p", sk); if (!addr || alen < sizeof(addr->sa_family) || addr->sa_family != AF_BLUETOOTH) return -EINVAL; memset(&la, 0, sizeof(la)); len = min_t(unsigned int, sizeof(la), alen); memcpy(&la, addr, len); |
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if (la.l2_cid && la.l2_psm) |
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return -EINVAL; |
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err = l2cap_chan_connect(chan, la.l2_psm, la.l2_cid, &la.l2_bdaddr); |
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if (err) goto done; |
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err = bt_sock_wait_state(sk, BT_CONNECTED, sock_sndtimeo(sk, flags & O_NONBLOCK)); done: |
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if (sock_owned_by_user(sk)) release_sock(sk); |
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return err; } |
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static int l2cap_sock_listen(struct socket *sock, int backlog) { struct sock *sk = sock->sk; |
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struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
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int err = 0; BT_DBG("sk %p backlog %d", sk, backlog); lock_sock(sk); if ((sock->type != SOCK_SEQPACKET && sock->type != SOCK_STREAM) || sk->sk_state != BT_BOUND) { err = -EBADFD; goto done; } |
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switch (chan->mode) { |
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case L2CAP_MODE_BASIC: break; case L2CAP_MODE_ERTM: case L2CAP_MODE_STREAMING: if (!disable_ertm) break; /* fall through */ default: err = -ENOTSUPP; goto done; } |
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sk->sk_max_ack_backlog = backlog; sk->sk_ack_backlog = 0; |
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chan->state = BT_LISTEN; |
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sk->sk_state = BT_LISTEN; done: release_sock(sk); return err; } |
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static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int flags) { DECLARE_WAITQUEUE(wait, current); struct sock *sk = sock->sk, *nsk; long timeo; int err = 0; lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
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timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); BT_DBG("sk %p timeo %ld", sk, timeo); /* Wait for an incoming connection. (wake-one). */ add_wait_queue_exclusive(sk_sleep(sk), &wait); |
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while (1) { |
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set_current_state(TASK_INTERRUPTIBLE); |
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if (sk->sk_state != BT_LISTEN) { err = -EBADFD; |
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break; } |
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nsk = bt_accept_dequeue(sk, newsock); if (nsk) break; |
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|
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if (!timeo) { err = -EAGAIN; |
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break; } if (signal_pending(current)) { err = sock_intr_errno(timeo); break; } |
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release_sock(sk); timeo = schedule_timeout(timeo); lock_sock_nested(sk, SINGLE_DEPTH_NESTING); |
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} |
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__set_current_state(TASK_RUNNING); |
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remove_wait_queue(sk_sleep(sk), &wait); if (err) goto done; newsock->state = SS_CONNECTED; BT_DBG("new socket %p", nsk); done: release_sock(sk); return err; } |
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static int l2cap_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) { struct sockaddr_l2 *la = (struct sockaddr_l2 *) addr; struct sock *sk = sock->sk; |
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struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
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BT_DBG("sock %p, sk %p", sock, sk); addr->sa_family = AF_BLUETOOTH; *len = sizeof(struct sockaddr_l2); if (peer) { |
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la->l2_psm = chan->psm; |
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bacpy(&la->l2_bdaddr, &bt_sk(sk)->dst); |
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la->l2_cid = cpu_to_le16(chan->dcid); |
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} else { |
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la->l2_psm = chan->sport; |
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bacpy(&la->l2_bdaddr, &bt_sk(sk)->src); |
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la->l2_cid = cpu_to_le16(chan->scid); |
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} return 0; } |
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static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) { struct sock *sk = sock->sk; |
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struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
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struct l2cap_options opts; struct l2cap_conninfo cinfo; int len, err = 0; u32 opt; BT_DBG("sk %p", sk); if (get_user(len, optlen)) return -EFAULT; lock_sock(sk); switch (optname) { case L2CAP_OPTIONS: |
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memset(&opts, 0, sizeof(opts)); |
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opts.imtu = chan->imtu; opts.omtu = chan->omtu; opts.flush_to = chan->flush_to; opts.mode = chan->mode; |
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opts.fcs = chan->fcs; opts.max_tx = chan->max_tx; |
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opts.txwin_size = chan->tx_win; |
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len = min_t(unsigned int, len, sizeof(opts)); if (copy_to_user(optval, (char *) &opts, len)) err = -EFAULT; break; case L2CAP_LM: |
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switch (chan->sec_level) { |
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case BT_SECURITY_LOW: opt = L2CAP_LM_AUTH; break; case BT_SECURITY_MEDIUM: opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT; break; case BT_SECURITY_HIGH: opt = L2CAP_LM_AUTH | L2CAP_LM_ENCRYPT | L2CAP_LM_SECURE; break; default: opt = 0; break; } |
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if (test_bit(FLAG_ROLE_SWITCH, &chan->flags)) |
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opt |= L2CAP_LM_MASTER; |
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if (test_bit(FLAG_FORCE_RELIABLE, &chan->flags)) |
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opt |= L2CAP_LM_RELIABLE; if (put_user(opt, (u32 __user *) optval)) err = -EFAULT; break; case L2CAP_CONNINFO: if (sk->sk_state != BT_CONNECTED && !(sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup)) { err = -ENOTCONN; break; } |
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memset(&cinfo, 0, sizeof(cinfo)); |
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cinfo.hci_handle = chan->conn->hcon->handle; memcpy(cinfo.dev_class, chan->conn->hcon->dev_class, 3); |
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len = min_t(unsigned int, len, sizeof(cinfo)); if (copy_to_user(optval, (char *) &cinfo, len)) err = -EFAULT; break; default: err = -ENOPROTOOPT; break; } release_sock(sk); return err; } static int l2cap_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) { struct sock *sk = sock->sk; |
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struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
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struct bt_security sec; |
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struct bt_power pwr; |
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int len, err = 0; BT_DBG("sk %p", sk); if (level == SOL_L2CAP) return l2cap_sock_getsockopt_old(sock, optname, optval, optlen); if (level != SOL_BLUETOOTH) return -ENOPROTOOPT; if (get_user(len, optlen)) return -EFAULT; lock_sock(sk); switch (optname) { case BT_SECURITY: |
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if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && chan->chan_type != L2CAP_CHAN_RAW) { |
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err = -EINVAL; break; } |
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memset(&sec, 0, sizeof(sec)); |
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sec.level = chan->sec_level; |
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|
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if (sk->sk_state == BT_CONNECTED) sec.key_size = chan->conn->hcon->enc_key_size; |
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len = min_t(unsigned int, len, sizeof(sec)); if (copy_to_user(optval, (char *) &sec, len)) err = -EFAULT; break; case BT_DEFER_SETUP: if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { err = -EINVAL; break; } if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval)) err = -EFAULT; break; case BT_FLUSHABLE: |
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if (put_user(test_bit(FLAG_FLUSHABLE, &chan->flags), (u32 __user *) optval)) |
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err = -EFAULT; break; |
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case BT_POWER: if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM && sk->sk_type != SOCK_RAW) { err = -EINVAL; break; } |
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pwr.force_active = test_bit(FLAG_FORCE_ACTIVE, &chan->flags); |
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len = min_t(unsigned int, len, sizeof(pwr)); if (copy_to_user(optval, (char *) &pwr, len)) err = -EFAULT; break; |
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case BT_CHANNEL_POLICY: if (!enable_hs) { err = -ENOPROTOOPT; break; } if (put_user(chan->chan_policy, (u32 __user *) optval)) err = -EFAULT; break; |
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default: err = -ENOPROTOOPT; break; } release_sock(sk); return err; } |
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static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen) { struct sock *sk = sock->sk; |
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struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
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struct l2cap_options opts; int len, err = 0; u32 opt; BT_DBG("sk %p", sk); lock_sock(sk); switch (optname) { case L2CAP_OPTIONS: if (sk->sk_state == BT_CONNECTED) { err = -EINVAL; break; } |
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opts.imtu = chan->imtu; opts.omtu = chan->omtu; opts.flush_to = chan->flush_to; opts.mode = chan->mode; |
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opts.fcs = chan->fcs; opts.max_tx = chan->max_tx; |
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opts.txwin_size = chan->tx_win; |
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len = min_t(unsigned int, sizeof(opts), optlen); if (copy_from_user((char *) &opts, optval, len)) { err = -EFAULT; break; } |
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if (opts.txwin_size > L2CAP_DEFAULT_EXT_WINDOW) { |
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err = -EINVAL; break; } |
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chan->mode = opts.mode; switch (chan->mode) { |
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case L2CAP_MODE_BASIC: |
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clear_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
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break; case L2CAP_MODE_ERTM: case L2CAP_MODE_STREAMING: if (!disable_ertm) break; /* fall through */ default: err = -EINVAL; break; } |
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chan->imtu = opts.imtu; chan->omtu = opts.omtu; |
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chan->fcs = opts.fcs; chan->max_tx = opts.max_tx; |
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chan->tx_win = opts.txwin_size; |
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break; case L2CAP_LM: if (get_user(opt, (u32 __user *) optval)) { err = -EFAULT; break; } if (opt & L2CAP_LM_AUTH) |
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chan->sec_level = BT_SECURITY_LOW; |
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if (opt & L2CAP_LM_ENCRYPT) |
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chan->sec_level = BT_SECURITY_MEDIUM; |
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if (opt & L2CAP_LM_SECURE) |
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chan->sec_level = BT_SECURITY_HIGH; |
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|
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if (opt & L2CAP_LM_MASTER) set_bit(FLAG_ROLE_SWITCH, &chan->flags); else clear_bit(FLAG_ROLE_SWITCH, &chan->flags); |
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if (opt & L2CAP_LM_RELIABLE) set_bit(FLAG_FORCE_RELIABLE, &chan->flags); else clear_bit(FLAG_FORCE_RELIABLE, &chan->flags); |
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break; default: err = -ENOPROTOOPT; break; } release_sock(sk); return err; } static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) { struct sock *sk = sock->sk; |
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struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
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struct bt_security sec; |
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struct bt_power pwr; |
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struct l2cap_conn *conn; |
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int len, err = 0; u32 opt; BT_DBG("sk %p", sk); if (level == SOL_L2CAP) return l2cap_sock_setsockopt_old(sock, optname, optval, optlen); if (level != SOL_BLUETOOTH) return -ENOPROTOOPT; lock_sock(sk); switch (optname) { case BT_SECURITY: |
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if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && chan->chan_type != L2CAP_CHAN_RAW) { |
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err = -EINVAL; break; } sec.level = BT_SECURITY_LOW; len = min_t(unsigned int, sizeof(sec), optlen); if (copy_from_user((char *) &sec, optval, len)) { err = -EFAULT; break; } if (sec.level < BT_SECURITY_LOW || sec.level > BT_SECURITY_HIGH) { err = -EINVAL; break; } |
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chan->sec_level = sec.level; |
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|
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if (!chan->conn) break; |
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conn = chan->conn; |
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/*change security for LE channels */ if (chan->scid == L2CAP_CID_LE_DATA) { |
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if (!conn->hcon->out) { err = -EINVAL; break; } if (smp_conn_security(conn, sec.level)) break; |
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sk->sk_state = BT_CONFIG; |
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chan->state = BT_CONFIG; |
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/* or for ACL link, under defer_setup time */ } else if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) { err = l2cap_chan_check_security(chan); } else { err = -EINVAL; |
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} |
33575df7b Bluetooth: move l... |
568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 |
break; case BT_DEFER_SETUP: if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { err = -EINVAL; break; } if (get_user(opt, (u32 __user *) optval)) { err = -EFAULT; break; } bt_sk(sk)->defer_setup = opt; break; case BT_FLUSHABLE: if (get_user(opt, (u32 __user *) optval)) { err = -EFAULT; break; } if (opt > BT_FLUSHABLE_ON) { err = -EINVAL; break; } if (opt == BT_FLUSHABLE_OFF) { |
8c1d787be Bluetooth: Move c... |
596 |
struct l2cap_conn *conn = chan->conn; |
25985edce Fix common misspe... |
597 |
/* proceed further only when we have l2cap_conn and |
33575df7b Bluetooth: move l... |
598 599 600 601 602 603 |
No Flush support in the LM */ if (!conn || !lmp_no_flush_capable(conn->hcon->hdev)) { err = -EINVAL; break; } } |
d57b0e8b8 Bluetooth: conver... |
604 605 606 607 |
if (opt) set_bit(FLAG_FLUSHABLE, &chan->flags); else clear_bit(FLAG_FLUSHABLE, &chan->flags); |
33575df7b Bluetooth: move l... |
608 |
break; |
14b12d0b9 Bluetooth: Add BT... |
609 610 611 612 613 614 615 616 617 618 619 620 621 622 |
case BT_POWER: if (chan->chan_type != L2CAP_CHAN_CONN_ORIENTED && chan->chan_type != L2CAP_CHAN_RAW) { err = -EINVAL; break; } pwr.force_active = BT_POWER_FORCE_ACTIVE_ON; len = min_t(unsigned int, sizeof(pwr), optlen); if (copy_from_user((char *) &pwr, optval, len)) { err = -EFAULT; break; } |
15770b1ab Bluetooth: conver... |
623 624 625 626 627 |
if (pwr.force_active) set_bit(FLAG_FORCE_ACTIVE, &chan->flags); else clear_bit(FLAG_FORCE_ACTIVE, &chan->flags); |
14b12d0b9 Bluetooth: Add BT... |
628 |
break; |
2ea664822 Bluetooth: Add ch... |
629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 |
case BT_CHANNEL_POLICY: if (!enable_hs) { err = -ENOPROTOOPT; break; } if (get_user(opt, (u32 __user *) optval)) { err = -EFAULT; break; } if (opt > BT_CHANNEL_POLICY_AMP_PREFERRED) { err = -EINVAL; break; } if (chan->mode != L2CAP_MODE_ERTM && chan->mode != L2CAP_MODE_STREAMING) { err = -EOPNOTSUPP; break; } chan->chan_policy = (u8) opt; |
14b12d0b9 Bluetooth: Add BT... |
652 |
break; |
33575df7b Bluetooth: move l... |
653 654 655 656 657 658 659 660 |
default: err = -ENOPROTOOPT; break; } release_sock(sk); return err; } |
fd83ccdb3 Bluetooth: move l... |
661 662 663 664 |
static int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len) { struct sock *sk = sock->sk; |
0c1bc5c62 Bluetooth: Move m... |
665 |
struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
fd83ccdb3 Bluetooth: move l... |
666 667 668 669 670 671 672 673 674 675 676 677 678 679 |
int err; BT_DBG("sock %p, sk %p", sock, sk); err = sock_error(sk); if (err) return err; if (msg->msg_flags & MSG_OOB) return -EOPNOTSUPP; lock_sock(sk); if (sk->sk_state != BT_CONNECTED) { |
9a91a04a9 Bluetooth: Create... |
680 681 |
release_sock(sk); return -ENOTCONN; |
fd83ccdb3 Bluetooth: move l... |
682 |
} |
5e59b791c Bluetooth: set sk... |
683 |
err = l2cap_chan_send(chan, msg, len, sk->sk_priority); |
fd83ccdb3 Bluetooth: move l... |
684 |
|
fd83ccdb3 Bluetooth: move l... |
685 686 687 |
release_sock(sk); return err; } |
33575df7b Bluetooth: move l... |
688 |
|
689832592 Bluetooth: move l... |
689 690 691 |
static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags) { struct sock *sk = sock->sk; |
e328140fd Bluetooth: Use ev... |
692 693 |
struct l2cap_pinfo *pi = l2cap_pi(sk); int err; |
689832592 Bluetooth: move l... |
694 695 696 697 |
lock_sock(sk); if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) { |
8c1d787be Bluetooth: Move c... |
698 |
sk->sk_state = BT_CONFIG; |
3542b854b Bluetooth: Keep c... |
699 |
pi->chan->state = BT_CONFIG; |
8c1d787be Bluetooth: Move c... |
700 |
|
e328140fd Bluetooth: Use ev... |
701 |
__l2cap_connect_rsp_defer(pi->chan); |
689832592 Bluetooth: move l... |
702 703 704 705 706 707 708 |
release_sock(sk); return 0; } release_sock(sk); if (sock->type == SOCK_STREAM) |
e328140fd Bluetooth: Use ev... |
709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 |
err = bt_sock_stream_recvmsg(iocb, sock, msg, len, flags); else err = bt_sock_recvmsg(iocb, sock, msg, len, flags); if (pi->chan->mode != L2CAP_MODE_ERTM) return err; /* Attempt to put pending rx data in the socket buffer */ lock_sock(sk); if (!test_bit(CONN_LOCAL_BUSY, &pi->chan->conn_state)) goto done; if (pi->rx_busy_skb) { if (!sock_queue_rcv_skb(sk, pi->rx_busy_skb)) pi->rx_busy_skb = NULL; else goto done; } /* Restore data flow when half of the receive buffer is * available. This avoids resending large numbers of * frames. */ if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf >> 1) l2cap_chan_busy(pi->chan, 0); |
689832592 Bluetooth: move l... |
736 |
|
e328140fd Bluetooth: Use ev... |
737 738 739 |
done: release_sock(sk); return err; |
689832592 Bluetooth: move l... |
740 |
} |
05fc1576d Bluetooth: move l... |
741 742 743 |
/* Kill socket (only if zapped and orphan) * Must be called on unlocked socket. */ |
ba3bd0ee3 Bluetooth: add cl... |
744 |
static void l2cap_sock_kill(struct sock *sk) |
05fc1576d Bluetooth: move l... |
745 746 747 748 749 750 751 |
{ if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) return; BT_DBG("sk %p state %d", sk, sk->sk_state); /* Kill poor orphan */ |
6ff5abbf4 Bluetooth: Fix me... |
752 |
|
23691d75c Bluetooth: Remove... |
753 |
l2cap_chan_destroy(l2cap_pi(sk)->chan); |
05fc1576d Bluetooth: move l... |
754 755 756 |
sock_set_flag(sk, SOCK_DEAD); sock_put(sk); } |
dcba0dba5 Bluetooth: move l... |
757 758 759 |
static int l2cap_sock_shutdown(struct socket *sock, int how) { struct sock *sk = sock->sk; |
0c1bc5c62 Bluetooth: Move m... |
760 |
struct l2cap_chan *chan = l2cap_pi(sk)->chan; |
dcba0dba5 Bluetooth: move l... |
761 762 763 764 765 766 767 768 769 |
int err = 0; BT_DBG("sock %p, sk %p", sock, sk); if (!sk) return 0; lock_sock(sk); if (!sk->sk_shutdown) { |
0c1bc5c62 Bluetooth: Move m... |
770 |
if (chan->mode == L2CAP_MODE_ERTM) |
dcba0dba5 Bluetooth: move l... |
771 772 773 |
err = __l2cap_wait_ack(sk); sk->sk_shutdown = SHUTDOWN_MASK; |
0f8527249 Bluetooth: Rename... |
774 |
l2cap_chan_close(chan, 0); |
dcba0dba5 Bluetooth: move l... |
775 776 777 778 779 780 781 782 783 784 785 786 |
if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime); } if (!err && sk->sk_err) err = -sk->sk_err; release_sock(sk); return err; } |
554f05bb8 Bluetooth: move l... |
787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 |
static int l2cap_sock_release(struct socket *sock) { struct sock *sk = sock->sk; int err; BT_DBG("sock %p, sk %p", sock, sk); if (!sk) return 0; err = l2cap_sock_shutdown(sock, 2); sock_orphan(sk); l2cap_sock_kill(sk); return err; } |
80808e431 Bluetooth: Add l2... |
803 804 805 806 807 808 809 810 811 812 813 814 815 |
static struct l2cap_chan *l2cap_sock_new_connection_cb(void *data) { struct sock *sk, *parent = data; sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, GFP_ATOMIC); if (!sk) return NULL; l2cap_sock_init(sk, parent); return l2cap_pi(sk)->chan; } |
230704942 Bluetooth: add re... |
816 817 |
static int l2cap_sock_recv_cb(void *data, struct sk_buff *skb) { |
e328140fd Bluetooth: Use ev... |
818 |
int err; |
230704942 Bluetooth: add re... |
819 |
struct sock *sk = data; |
e328140fd Bluetooth: Use ev... |
820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 |
struct l2cap_pinfo *pi = l2cap_pi(sk); if (pi->rx_busy_skb) return -ENOMEM; err = sock_queue_rcv_skb(sk, skb); /* For ERTM, handle one skb that doesn't fit into the recv * buffer. This is important to do because the data frames * have already been acked, so the skb cannot be discarded. * * Notify the l2cap core that the buffer is full, so the * LOCAL_BUSY state is entered and no more frames are * acked and reassembled until there is buffer space * available. */ if (err < 0 && pi->chan->mode == L2CAP_MODE_ERTM) { pi->rx_busy_skb = skb; l2cap_chan_busy(pi->chan, 1); err = 0; } |
230704942 Bluetooth: add re... |
841 |
|
e328140fd Bluetooth: Use ev... |
842 |
return err; |
230704942 Bluetooth: add re... |
843 |
} |
ba3bd0ee3 Bluetooth: add cl... |
844 845 846 847 848 849 |
static void l2cap_sock_close_cb(void *data) { struct sock *sk = data; l2cap_sock_kill(sk); } |
89bc500e4 Bluetooth: Add st... |
850 851 852 853 854 855 |
static void l2cap_sock_state_change_cb(void *data, int state) { struct sock *sk = data; sk->sk_state = state; } |
80808e431 Bluetooth: Add l2... |
856 857 858 |
static struct l2cap_ops l2cap_chan_ops = { .name = "L2CAP Socket Interface", .new_connection = l2cap_sock_new_connection_cb, |
230704942 Bluetooth: add re... |
859 |
.recv = l2cap_sock_recv_cb, |
ba3bd0ee3 Bluetooth: add cl... |
860 |
.close = l2cap_sock_close_cb, |
89bc500e4 Bluetooth: Add st... |
861 |
.state_change = l2cap_sock_state_change_cb, |
80808e431 Bluetooth: Add l2... |
862 |
}; |
bb58f747e Bluetooth: Initia... |
863 864 865 |
static void l2cap_sock_destruct(struct sock *sk) { BT_DBG("sk %p", sk); |
e328140fd Bluetooth: Use ev... |
866 867 868 869 |
if (l2cap_pi(sk)->rx_busy_skb) { kfree_skb(l2cap_pi(sk)->rx_busy_skb); l2cap_pi(sk)->rx_busy_skb = NULL; } |
bb58f747e Bluetooth: Initia... |
870 871 872 |
skb_queue_purge(&sk->sk_receive_queue); skb_queue_purge(&sk->sk_write_queue); } |
80808e431 Bluetooth: Add l2... |
873 |
static void l2cap_sock_init(struct sock *sk, struct sock *parent) |
bb58f747e Bluetooth: Initia... |
874 875 |
{ struct l2cap_pinfo *pi = l2cap_pi(sk); |
b44500351 Bluetooth: Move c... |
876 |
struct l2cap_chan *chan = pi->chan; |
bb58f747e Bluetooth: Initia... |
877 878 879 880 |
BT_DBG("sk %p", sk); if (parent) { |
b44500351 Bluetooth: Move c... |
881 |
struct l2cap_chan *pchan = l2cap_pi(parent)->chan; |
bb58f747e Bluetooth: Initia... |
882 883 |
sk->sk_type = parent->sk_type; bt_sk(sk)->defer_setup = bt_sk(parent)->defer_setup; |
715ec005c Bluetooth: Add ch... |
884 |
chan->chan_type = pchan->chan_type; |
0c1bc5c62 Bluetooth: Move m... |
885 886 |
chan->imtu = pchan->imtu; chan->omtu = pchan->omtu; |
b44500351 Bluetooth: Move c... |
887 |
chan->conf_state = pchan->conf_state; |
0c1bc5c62 Bluetooth: Move m... |
888 |
chan->mode = pchan->mode; |
47d1ec616 Bluetooth: Move m... |
889 890 891 |
chan->fcs = pchan->fcs; chan->max_tx = pchan->max_tx; chan->tx_win = pchan->tx_win; |
6b3c71046 Bluetooth: Initia... |
892 |
chan->tx_win_max = pchan->tx_win_max; |
4343478f3 Bluetooth: Move s... |
893 |
chan->sec_level = pchan->sec_level; |
d57b0e8b8 Bluetooth: conver... |
894 |
chan->flags = pchan->flags; |
6230c9b4f bluetooth: Proper... |
895 896 |
security_sk_clone(parent, sk); |
bb58f747e Bluetooth: Initia... |
897 |
} else { |
715ec005c Bluetooth: Add ch... |
898 899 900 901 902 903 904 905 906 907 908 909 910 |
switch (sk->sk_type) { case SOCK_RAW: chan->chan_type = L2CAP_CHAN_RAW; break; case SOCK_DGRAM: chan->chan_type = L2CAP_CHAN_CONN_LESS; break; case SOCK_SEQPACKET: case SOCK_STREAM: chan->chan_type = L2CAP_CHAN_CONN_ORIENTED; break; } |
0c1bc5c62 Bluetooth: Move m... |
911 912 |
chan->imtu = L2CAP_DEFAULT_MTU; chan->omtu = 0; |
bb58f747e Bluetooth: Initia... |
913 |
if (!disable_ertm && sk->sk_type == SOCK_STREAM) { |
0c1bc5c62 Bluetooth: Move m... |
914 |
chan->mode = L2CAP_MODE_ERTM; |
c1360a1cf Bluetooth: use bi... |
915 |
set_bit(CONF_STATE2_DEVICE, &chan->conf_state); |
bb58f747e Bluetooth: Initia... |
916 |
} else { |
0c1bc5c62 Bluetooth: Move m... |
917 |
chan->mode = L2CAP_MODE_BASIC; |
bb58f747e Bluetooth: Initia... |
918 |
} |
47d1ec616 Bluetooth: Move m... |
919 920 921 |
chan->max_tx = L2CAP_DEFAULT_MAX_TX; chan->fcs = L2CAP_FCS_CRC16; chan->tx_win = L2CAP_DEFAULT_TX_WINDOW; |
6b3c71046 Bluetooth: Initia... |
922 |
chan->tx_win_max = L2CAP_DEFAULT_TX_WINDOW; |
4343478f3 Bluetooth: Move s... |
923 |
chan->sec_level = BT_SECURITY_LOW; |
d57b0e8b8 Bluetooth: conver... |
924 |
chan->flags = 0; |
15770b1ab Bluetooth: conver... |
925 |
set_bit(FLAG_FORCE_ACTIVE, &chan->flags); |
bb58f747e Bluetooth: Initia... |
926 927 928 |
} /* Default config options */ |
0c1bc5c62 Bluetooth: Move m... |
929 |
chan->flush_to = L2CAP_DEFAULT_FLUSH_TO; |
80808e431 Bluetooth: Add l2... |
930 931 932 |
chan->data = sk; chan->ops = &l2cap_chan_ops; |
bb58f747e Bluetooth: Initia... |
933 934 935 936 937 938 939 |
} static struct proto l2cap_proto = { .name = "L2CAP", .owner = THIS_MODULE, .obj_size = sizeof(struct l2cap_pinfo) }; |
80808e431 Bluetooth: Add l2... |
940 |
static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) |
bb58f747e Bluetooth: Initia... |
941 942 |
{ struct sock *sk; |
dc50a06da Bluetooth: Merge ... |
943 |
struct l2cap_chan *chan; |
bb58f747e Bluetooth: Initia... |
944 945 946 947 948 949 950 951 952 |
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; |
6be6b11f0 Bluetooth: Fixed ... |
953 |
sk->sk_sndtimeo = L2CAP_CONN_TIMEOUT; |
bb58f747e Bluetooth: Initia... |
954 955 956 957 958 |
sock_reset_flag(sk, SOCK_ZAPPED); sk->sk_protocol = proto; sk->sk_state = BT_OPEN; |
dc50a06da Bluetooth: Merge ... |
959 960 961 962 963 964 965 |
chan = l2cap_chan_create(sk); if (!chan) { l2cap_sock_kill(sk); return NULL; } l2cap_pi(sk)->chan = chan; |
bb58f747e Bluetooth: Initia... |
966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 |
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; } |
cf2f90f59 Bluetooth: Don't ... |
994 |
static const struct proto_ops l2cap_sock_ops = { |
65390587c Bluetooth: move l... |
995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 |
.family = PF_BLUETOOTH, .owner = THIS_MODULE, .release = l2cap_sock_release, .bind = l2cap_sock_bind, .connect = l2cap_sock_connect, .listen = l2cap_sock_listen, .accept = l2cap_sock_accept, .getname = l2cap_sock_getname, .sendmsg = l2cap_sock_sendmsg, .recvmsg = l2cap_sock_recvmsg, .poll = bt_sock_poll, .ioctl = bt_sock_ioctl, .mmap = sock_no_mmap, .socketpair = sock_no_socketpair, .shutdown = l2cap_sock_shutdown, .setsockopt = l2cap_sock_setsockopt, .getsockopt = l2cap_sock_getsockopt }; |
bb58f747e Bluetooth: Initia... |
1013 1014 1015 1016 1017 1018 1019 1020 |
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) { |
e2174ca43 Bluetooth: fix er... |
1021 |
int err; |
bb58f747e Bluetooth: Initia... |
1022 |
|
e2174ca43 Bluetooth: fix er... |
1023 1024 1025 |
err = proto_register(&l2cap_proto, 0); if (err < 0) return err; |
bb58f747e Bluetooth: Initia... |
1026 |
|
e2174ca43 Bluetooth: fix er... |
1027 1028 1029 |
err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops); if (err < 0) goto error; |
bb58f747e Bluetooth: Initia... |
1030 |
|
e2174ca43 Bluetooth: fix er... |
1031 |
BT_INFO("L2CAP socket layer initialized"); |
bb58f747e Bluetooth: Initia... |
1032 |
|
e2174ca43 Bluetooth: fix er... |
1033 |
return 0; |
bb58f747e Bluetooth: Initia... |
1034 1035 |
error: |
e2174ca43 Bluetooth: fix er... |
1036 1037 1038 |
BT_ERR("L2CAP socket registration failed"); proto_unregister(&l2cap_proto); return err; |
bb58f747e Bluetooth: Initia... |
1039 1040 1041 1042 |
} void l2cap_cleanup_sockets(void) { |
e2174ca43 Bluetooth: fix er... |
1043 1044 |
if (bt_sock_unregister(BTPROTO_L2CAP) < 0) BT_ERR("L2CAP socket unregistration failed"); |
bb58f747e Bluetooth: Initia... |
1045 |
|
e2174ca43 Bluetooth: fix er... |
1046 |
proto_unregister(&l2cap_proto); |
bb58f747e Bluetooth: Initia... |
1047 |
} |