2007-02-09 15:24:33 +01:00
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/*
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2005-04-17 00:20:36 +02:00
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BlueZ - Bluetooth protocol stack for Linux
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Copyright (C) 2000-2001 Qualcomm Incorporated
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2010-07-13 16:57:11 +02:00
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Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org>
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2010-07-16 21:18:39 +02:00
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Copyright (C) 2010 Google Inc.
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2005-04-17 00:20:36 +02:00
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Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License version 2 as
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published by the Free Software Foundation;
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
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IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
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2007-02-09 15:24:33 +01:00
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CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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2005-04-17 00:20:36 +02:00
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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2007-02-09 15:24:33 +01:00
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ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
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COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
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2005-04-17 00:20:36 +02:00
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SOFTWARE IS DISCLAIMED.
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*/
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2011-02-03 23:50:35 +01:00
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/* Bluetooth L2CAP core. */
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2005-04-17 00:20:36 +02:00
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#include <linux/module.h>
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#include <linux/types.h>
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2006-01-11 21:17:47 +01:00
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#include <linux/capability.h>
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2005-04-17 00:20:36 +02:00
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/poll.h>
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#include <linux/fcntl.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/socket.h>
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#include <linux/skbuff.h>
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#include <linux/list.h>
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2005-11-08 18:57:38 +01:00
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#include <linux/device.h>
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2010-03-21 05:27:45 +01:00
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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2009-04-20 06:31:08 +02:00
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#include <linux/uaccess.h>
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2009-08-21 03:26:02 +02:00
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#include <linux/crc16.h>
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2005-04-17 00:20:36 +02:00
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#include <net/sock.h>
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#include <asm/system.h>
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#include <asm/unaligned.h>
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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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2010-07-13 16:57:12 +02:00
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#define VERSION "2.15"
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2009-05-03 04:09:01 +02:00
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2011-02-03 23:50:35 +01:00
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int disable_ertm;
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2007-10-20 13:38:51 +02:00
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2009-05-03 03:57:55 +02:00
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static u32 l2cap_feat_mask = L2CAP_FEAT_FIXED_CHAN;
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2009-02-09 09:18:02 +01:00
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static u8 l2cap_fixed_chan[8] = { 0x02, };
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2005-04-17 00:20:36 +02:00
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2010-05-01 21:15:44 +02:00
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static struct workqueue_struct *_busy_wq;
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2011-02-03 23:50:35 +01:00
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struct bt_sock_list l2cap_sk_list = {
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2008-03-29 00:17:38 +01:00
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.lock = __RW_LOCK_UNLOCKED(l2cap_sk_list.lock)
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2005-04-17 00:20:36 +02:00
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};
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2010-05-01 21:15:44 +02:00
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static void l2cap_busy_work(struct work_struct *work);
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2005-04-17 00:20:36 +02:00
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static void l2cap_sock_close(struct sock *sk);
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2010-07-09 01:08:18 +02:00
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static int l2cap_build_conf_req(struct sock *sk, void *data);
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2005-04-17 00:20:36 +02:00
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static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn,
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u8 code, u8 ident, u16 dlen, void *data);
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2010-06-21 23:53:22 +02:00
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static int l2cap_ertm_data_rcv(struct sock *sk, struct sk_buff *skb);
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2005-04-17 00:20:36 +02:00
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/* ---- L2CAP timers ---- */
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2011-02-03 23:50:35 +01:00
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void l2cap_sock_set_timer(struct sock *sk, long timeout)
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2010-11-03 11:32:45 +01:00
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{
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BT_DBG("sk %p state %d timeout %ld", sk, sk->sk_state, timeout);
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sk_reset_timer(sk, &sk->sk_timer, jiffies + timeout);
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}
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static void l2cap_sock_clear_timer(struct sock *sk)
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{
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BT_DBG("sock %p state %d", sk, sk->sk_state);
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sk_stop_timer(sk, &sk->sk_timer);
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}
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2006-07-03 10:02:46 +02:00
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/* ---- L2CAP channels ---- */
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static struct sock *__l2cap_get_chan_by_dcid(struct l2cap_chan_list *l, u16 cid)
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{
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struct sock *s;
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for (s = l->head; s; s = l2cap_pi(s)->next_c) {
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if (l2cap_pi(s)->dcid == cid)
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break;
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}
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return s;
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}
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static struct sock *__l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid)
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{
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struct sock *s;
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for (s = l->head; s; s = l2cap_pi(s)->next_c) {
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if (l2cap_pi(s)->scid == cid)
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break;
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}
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return s;
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}
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/* Find channel with given SCID.
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* Returns locked socket */
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static inline struct sock *l2cap_get_chan_by_scid(struct l2cap_chan_list *l, u16 cid)
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{
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struct sock *s;
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read_lock(&l->lock);
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s = __l2cap_get_chan_by_scid(l, cid);
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2009-04-20 06:31:08 +02:00
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if (s)
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bh_lock_sock(s);
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2006-07-03 10:02:46 +02:00
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read_unlock(&l->lock);
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return s;
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}
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static struct sock *__l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident)
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{
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struct sock *s;
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for (s = l->head; s; s = l2cap_pi(s)->next_c) {
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if (l2cap_pi(s)->ident == ident)
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break;
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}
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return s;
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}
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static inline struct sock *l2cap_get_chan_by_ident(struct l2cap_chan_list *l, u8 ident)
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{
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struct sock *s;
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read_lock(&l->lock);
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s = __l2cap_get_chan_by_ident(l, ident);
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2009-04-20 06:31:08 +02:00
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if (s)
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bh_lock_sock(s);
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2006-07-03 10:02:46 +02:00
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read_unlock(&l->lock);
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return s;
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}
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static u16 l2cap_alloc_cid(struct l2cap_chan_list *l)
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{
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2009-04-20 06:31:05 +02:00
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u16 cid = L2CAP_CID_DYN_START;
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2006-07-03 10:02:46 +02:00
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2009-04-20 06:31:05 +02:00
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for (; cid < L2CAP_CID_DYN_END; cid++) {
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2009-04-20 06:31:08 +02:00
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if (!__l2cap_get_chan_by_scid(l, cid))
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2006-07-03 10:02:46 +02:00
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return cid;
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}
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return 0;
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}
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static inline void __l2cap_chan_link(struct l2cap_chan_list *l, struct sock *sk)
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{
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sock_hold(sk);
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if (l->head)
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l2cap_pi(l->head)->prev_c = sk;
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l2cap_pi(sk)->next_c = l->head;
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l2cap_pi(sk)->prev_c = NULL;
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l->head = sk;
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}
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static inline void l2cap_chan_unlink(struct l2cap_chan_list *l, struct sock *sk)
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{
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struct sock *next = l2cap_pi(sk)->next_c, *prev = l2cap_pi(sk)->prev_c;
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2006-07-12 23:00:07 +02:00
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write_lock_bh(&l->lock);
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2006-07-03 10:02:46 +02:00
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if (sk == l->head)
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l->head = next;
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if (next)
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l2cap_pi(next)->prev_c = prev;
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if (prev)
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l2cap_pi(prev)->next_c = next;
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2006-07-12 23:00:07 +02:00
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write_unlock_bh(&l->lock);
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2006-07-03 10:02:46 +02:00
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__sock_put(sk);
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}
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static void __l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent)
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{
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struct l2cap_chan_list *l = &conn->chan_list;
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2009-04-20 06:31:08 +02:00
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BT_DBG("conn %p, psm 0x%2.2x, dcid 0x%4.4x", conn,
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l2cap_pi(sk)->psm, l2cap_pi(sk)->dcid);
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2006-07-03 10:02:46 +02:00
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2009-02-12 14:02:50 +01:00
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conn->disc_reason = 0x13;
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2006-07-03 10:02:46 +02:00
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l2cap_pi(sk)->conn = conn;
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2010-05-01 21:15:42 +02:00
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if (sk->sk_type == SOCK_SEQPACKET || sk->sk_type == SOCK_STREAM) {
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2006-07-03 10:02:46 +02:00
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/* Alloc CID for connection-oriented socket */
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l2cap_pi(sk)->scid = l2cap_alloc_cid(l);
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} else if (sk->sk_type == SOCK_DGRAM) {
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/* Connectionless socket */
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2009-04-20 06:31:05 +02:00
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l2cap_pi(sk)->scid = L2CAP_CID_CONN_LESS;
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l2cap_pi(sk)->dcid = L2CAP_CID_CONN_LESS;
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2006-07-03 10:02:46 +02:00
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l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU;
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} else {
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/* Raw socket can send/recv signalling messages only */
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2009-04-20 06:31:05 +02:00
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l2cap_pi(sk)->scid = L2CAP_CID_SIGNALING;
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l2cap_pi(sk)->dcid = L2CAP_CID_SIGNALING;
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2006-07-03 10:02:46 +02:00
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l2cap_pi(sk)->omtu = L2CAP_DEFAULT_MTU;
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}
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__l2cap_chan_link(l, sk);
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if (parent)
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bt_accept_enqueue(parent, sk);
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}
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2007-02-09 15:24:33 +01:00
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/* Delete channel.
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2006-07-03 10:02:46 +02:00
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* Must be called on the locked socket. */
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static void l2cap_chan_del(struct sock *sk, int err)
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{
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struct l2cap_conn *conn = l2cap_pi(sk)->conn;
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struct sock *parent = bt_sk(sk)->parent;
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l2cap_sock_clear_timer(sk);
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BT_DBG("sk %p, conn %p, err %d", sk, conn, err);
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2007-02-09 15:24:33 +01:00
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if (conn) {
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2006-07-03 10:02:46 +02:00
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/* Unlink from channel list */
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l2cap_chan_unlink(&conn->chan_list, sk);
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l2cap_pi(sk)->conn = NULL;
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hci_conn_put(conn->hcon);
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}
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2008-07-14 20:13:54 +02:00
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sk->sk_state = BT_CLOSED;
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2006-07-03 10:02:46 +02:00
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sock_set_flag(sk, SOCK_ZAPPED);
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if (err)
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sk->sk_err = err;
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if (parent) {
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bt_accept_unlink(sk);
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parent->sk_data_ready(parent, 0);
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} else
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sk->sk_state_change(sk);
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2010-05-14 01:50:12 +02:00
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skb_queue_purge(TX_QUEUE(sk));
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if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) {
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struct srej_list *l, *tmp;
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del_timer(&l2cap_pi(sk)->retrans_timer);
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del_timer(&l2cap_pi(sk)->monitor_timer);
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del_timer(&l2cap_pi(sk)->ack_timer);
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skb_queue_purge(SREJ_QUEUE(sk));
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skb_queue_purge(BUSY_QUEUE(sk));
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list_for_each_entry_safe(l, tmp, SREJ_LIST(sk), list) {
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list_del(&l->list);
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kfree(l);
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}
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}
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2006-07-03 10:02:46 +02:00
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}
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2011-01-19 07:36:50 +01:00
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static inline u8 l2cap_get_auth_type(struct sock *sk)
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2008-07-14 20:13:44 +02:00
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{
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2011-01-19 07:36:50 +01:00
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if (sk->sk_type == SOCK_RAW) {
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switch (l2cap_pi(sk)->sec_level) {
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case BT_SECURITY_HIGH:
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return HCI_AT_DEDICATED_BONDING_MITM;
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case BT_SECURITY_MEDIUM:
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return HCI_AT_DEDICATED_BONDING;
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default:
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return HCI_AT_NO_BONDING;
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}
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} else if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) {
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if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW)
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l2cap_pi(sk)->sec_level = BT_SECURITY_SDP;
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2009-02-09 02:48:38 +01:00
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2009-02-12 16:19:45 +01:00
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if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH)
|
2011-01-19 07:36:50 +01:00
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return HCI_AT_NO_BONDING_MITM;
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2009-02-12 16:19:45 +01:00
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else
|
2011-01-19 07:36:50 +01:00
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return HCI_AT_NO_BONDING;
|
2009-02-12 16:19:45 +01:00
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} else {
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switch (l2cap_pi(sk)->sec_level) {
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case BT_SECURITY_HIGH:
|
2011-01-19 07:36:50 +01:00
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return HCI_AT_GENERAL_BONDING_MITM;
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2009-02-12 16:19:45 +01:00
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case BT_SECURITY_MEDIUM:
|
2011-01-19 07:36:50 +01:00
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return HCI_AT_GENERAL_BONDING;
|
2009-02-12 16:19:45 +01:00
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default:
|
2011-01-19 07:36:50 +01:00
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return HCI_AT_NO_BONDING;
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2009-02-12 16:19:45 +01:00
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|
}
|
2009-02-09 02:48:38 +01:00
|
|
|
}
|
2011-01-19 07:36:50 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Service level security */
|
|
|
|
static inline int l2cap_check_security(struct sock *sk)
|
|
|
|
{
|
|
|
|
struct l2cap_conn *conn = l2cap_pi(sk)->conn;
|
|
|
|
__u8 auth_type;
|
|
|
|
|
|
|
|
auth_type = l2cap_get_auth_type(sk);
|
2008-07-14 20:13:44 +02:00
|
|
|
|
2009-02-09 02:48:38 +01:00
|
|
|
return hci_conn_security(conn->hcon, l2cap_pi(sk)->sec_level,
|
|
|
|
auth_type);
|
2008-07-14 20:13:44 +02:00
|
|
|
}
|
|
|
|
|
2007-10-20 13:37:56 +02:00
|
|
|
static inline u8 l2cap_get_ident(struct l2cap_conn *conn)
|
|
|
|
{
|
|
|
|
u8 id;
|
|
|
|
|
|
|
|
/* Get next available identificator.
|
|
|
|
* 1 - 128 are used by kernel.
|
|
|
|
* 129 - 199 are reserved.
|
|
|
|
* 200 - 254 are used by utilities like l2ping, etc.
|
|
|
|
*/
|
|
|
|
|
|
|
|
spin_lock_bh(&conn->lock);
|
|
|
|
|
|
|
|
if (++conn->tx_ident > 128)
|
|
|
|
conn->tx_ident = 1;
|
|
|
|
|
|
|
|
id = conn->tx_ident;
|
|
|
|
|
|
|
|
spin_unlock_bh(&conn->lock);
|
|
|
|
|
|
|
|
return id;
|
|
|
|
}
|
|
|
|
|
2010-05-01 21:15:43 +02:00
|
|
|
static inline void l2cap_send_cmd(struct l2cap_conn *conn, u8 ident, u8 code, u16 len, void *data)
|
2007-10-20 13:37:56 +02:00
|
|
|
{
|
|
|
|
struct sk_buff *skb = l2cap_build_cmd(conn, code, ident, len, data);
|
2011-01-03 10:14:36 +01:00
|
|
|
u8 flags;
|
2007-10-20 13:37:56 +02:00
|
|
|
|
|
|
|
BT_DBG("code 0x%2.2x", code);
|
|
|
|
|
|
|
|
if (!skb)
|
2010-05-01 21:15:43 +02:00
|
|
|
return;
|
2007-10-20 13:37:56 +02:00
|
|
|
|
2011-01-03 10:14:36 +01:00
|
|
|
if (lmp_no_flush_capable(conn->hcon->hdev))
|
|
|
|
flags = ACL_START_NO_FLUSH;
|
|
|
|
else
|
|
|
|
flags = ACL_START;
|
|
|
|
|
|
|
|
hci_send_acl(conn->hcon, skb, flags);
|
2007-10-20 13:37:56 +02:00
|
|
|
}
|
|
|
|
|
2010-05-01 21:15:43 +02:00
|
|
|
static inline void l2cap_send_sframe(struct l2cap_pinfo *pi, u16 control)
|
2009-08-21 03:25:57 +02:00
|
|
|
{
|
|
|
|
struct sk_buff *skb;
|
|
|
|
struct l2cap_hdr *lh;
|
|
|
|
struct l2cap_conn *conn = pi->conn;
|
2010-05-14 01:50:12 +02:00
|
|
|
struct sock *sk = (struct sock *)pi;
|
2009-08-21 03:26:02 +02:00
|
|
|
int count, hlen = L2CAP_HDR_SIZE + 2;
|
2011-01-03 10:14:36 +01:00
|
|
|
u8 flags;
|
2009-08-21 03:26:02 +02:00
|
|
|
|
2010-05-14 01:50:12 +02:00
|
|
|
if (sk->sk_state != BT_CONNECTED)
|
|
|
|
return;
|
|
|
|
|
2009-08-21 03:26:02 +02:00
|
|
|
if (pi->fcs == L2CAP_FCS_CRC16)
|
|
|
|
hlen += 2;
|
2009-08-21 03:25:57 +02:00
|
|
|
|
|
|
|
BT_DBG("pi %p, control 0x%2.2x", pi, control);
|
|
|
|
|
2009-08-21 03:26:02 +02:00
|
|
|
count = min_t(unsigned int, conn->mtu, hlen);
|
2009-08-21 03:25:57 +02:00
|
|
|
control |= L2CAP_CTRL_FRAME_TYPE;
|
|
|
|
|
2010-05-01 21:15:37 +02:00
|
|
|
if (pi->conn_state & L2CAP_CONN_SEND_FBIT) {
|
|
|
|
control |= L2CAP_CTRL_FINAL;
|
|
|
|
pi->conn_state &= ~L2CAP_CONN_SEND_FBIT;
|
|
|
|
}
|
|
|
|
|
2010-05-01 21:15:37 +02:00
|
|
|
if (pi->conn_state & L2CAP_CONN_SEND_PBIT) {
|
|
|
|
control |= L2CAP_CTRL_POLL;
|
|
|
|
pi->conn_state &= ~L2CAP_CONN_SEND_PBIT;
|
|
|
|
}
|
|
|
|
|
2009-08-21 03:25:57 +02:00
|
|
|
skb = bt_skb_alloc(count, GFP_ATOMIC);
|
|
|
|
if (!skb)
|
2010-05-01 21:15:43 +02:00
|
|
|
return;
|
2009-08-21 03:25:57 +02:00
|
|
|
|
|
|
|
lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE);
|
2009-08-21 03:26:02 +02:00
|
|
|
lh->len = cpu_to_le16(hlen - L2CAP_HDR_SIZE);
|
2009-08-21 03:25:57 +02:00
|
|
|
lh->cid = cpu_to_le16(pi->dcid);
|
|
|
|
put_unaligned_le16(control, skb_put(skb, 2));
|
|
|
|
|
2009-08-21 03:26:02 +02:00
|
|
|
if (pi->fcs == L2CAP_FCS_CRC16) {
|
|
|
|
u16 fcs = crc16(0, (u8 *)lh, count - 2);
|
|
|
|
put_unaligned_le16(fcs, skb_put(skb, 2));
|
|
|
|
}
|
|
|
|
|
2011-01-03 10:14:36 +01:00
|
|
|
if (lmp_no_flush_capable(conn->hcon->hdev))
|
|
|
|
flags = ACL_START_NO_FLUSH;
|
|
|
|
else
|
|
|
|
flags = ACL_START;
|
|
|
|
|
|
|
|
hci_send_acl(pi->conn->hcon, skb, flags);
|
2009-08-21 03:25:57 +02:00
|
|
|
}
|
|
|
|
|
2010-05-01 21:15:43 +02:00
|
|
|
static inline void l2cap_send_rr_or_rnr(struct l2cap_pinfo *pi, u16 control)
|
2009-08-26 09:04:03 +02:00
|
|
|
{
|
2010-05-01 21:15:44 +02:00
|
|
|
if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) {
|
2009-08-26 09:04:03 +02:00
|
|
|
control |= L2CAP_SUPER_RCV_NOT_READY;
|
2010-05-01 21:15:44 +02:00
|
|
|
pi->conn_state |= L2CAP_CONN_RNR_SENT;
|
|
|
|
} else
|
2009-08-26 09:04:03 +02:00
|
|
|
control |= L2CAP_SUPER_RCV_READY;
|
|
|
|
|
2009-10-03 07:34:40 +02:00
|
|
|
control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT;
|
|
|
|
|
2010-05-01 21:15:43 +02:00
|
|
|
l2cap_send_sframe(pi, control);
|
2009-08-26 09:04:03 +02:00
|
|
|
}
|
|
|
|
|
2010-07-08 11:14:41 +02:00
|
|
|
static inline int __l2cap_no_conn_pending(struct sock *sk)
|
|
|
|
{
|
|
|
|
return !(l2cap_pi(sk)->conf_state & L2CAP_CONF_CONNECT_PEND);
|
|
|
|
}
|
|
|
|
|
2008-07-14 20:13:44 +02:00
|
|
|
static void l2cap_do_start(struct sock *sk)
|
|
|
|
{
|
|
|
|
struct l2cap_conn *conn = l2cap_pi(sk)->conn;
|
|
|
|
|
|
|
|
if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) {
|
2009-02-06 23:35:19 +01:00
|
|
|
if (!(conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE))
|
|
|
|
return;
|
|
|
|
|
2010-07-08 11:14:41 +02:00
|
|
|
if (l2cap_check_security(sk) && __l2cap_no_conn_pending(sk)) {
|
2008-07-14 20:13:54 +02:00
|
|
|
struct l2cap_conn_req req;
|
|
|
|
req.scid = cpu_to_le16(l2cap_pi(sk)->scid);
|
|
|
|
req.psm = l2cap_pi(sk)->psm;
|
2008-07-14 20:13:44 +02:00
|
|
|
|
2008-07-14 20:13:54 +02:00
|
|
|
l2cap_pi(sk)->ident = l2cap_get_ident(conn);
|
2010-07-08 11:14:41 +02:00
|
|
|
l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND;
|
2008-07-14 20:13:44 +02:00
|
|
|
|
2008-07-14 20:13:54 +02:00
|
|
|
l2cap_send_cmd(conn, l2cap_pi(sk)->ident,
|
2008-07-14 20:13:44 +02:00
|
|
|
L2CAP_CONN_REQ, sizeof(req), &req);
|
2008-07-14 20:13:54 +02:00
|
|
|
}
|
2008-07-14 20:13:44 +02:00
|
|
|
} else {
|
|
|
|
struct l2cap_info_req req;
|
|
|
|
req.type = cpu_to_le16(L2CAP_IT_FEAT_MASK);
|
|
|
|
|
|
|
|
conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT;
|
|
|
|
conn->info_ident = l2cap_get_ident(conn);
|
|
|
|
|
|
|
|
mod_timer(&conn->info_timer, jiffies +
|
|
|
|
msecs_to_jiffies(L2CAP_INFO_TIMEOUT));
|
|
|
|
|
|
|
|
l2cap_send_cmd(conn, conn->info_ident,
|
|
|
|
L2CAP_INFO_REQ, sizeof(req), &req);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2010-06-08 01:54:45 +02:00
|
|
|
static inline int l2cap_mode_supported(__u8 mode, __u32 feat_mask)
|
|
|
|
{
|
|
|
|
u32 local_feat_mask = l2cap_feat_mask;
|
2010-07-18 21:25:54 +02:00
|
|
|
if (!disable_ertm)
|
2010-06-08 01:54:45 +02:00
|
|
|
local_feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING;
|
|
|
|
|
|
|
|
switch (mode) {
|
|
|
|
case L2CAP_MODE_ERTM:
|
|
|
|
return L2CAP_FEAT_ERTM & feat_mask & local_feat_mask;
|
|
|
|
case L2CAP_MODE_STREAMING:
|
|
|
|
return L2CAP_FEAT_STREAMING & feat_mask & local_feat_mask;
|
|
|
|
default:
|
|
|
|
return 0x00;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2010-05-20 21:21:53 +02:00
|
|
|
static void l2cap_send_disconn_req(struct l2cap_conn *conn, struct sock *sk, int err)
|
2009-07-23 15:27:23 +02:00
|
|
|
{
|
|
|
|
struct l2cap_disconn_req req;
|
|
|
|
|
2010-05-14 01:50:12 +02:00
|
|
|
if (!conn)
|
|
|
|
return;
|
|
|
|
|
|
|
|
skb_queue_purge(TX_QUEUE(sk));
|
|
|
|
|
|
|
|
if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) {
|
|
|
|
del_timer(&l2cap_pi(sk)->retrans_timer);
|
|
|
|
del_timer(&l2cap_pi(sk)->monitor_timer);
|
|
|
|
del_timer(&l2cap_pi(sk)->ack_timer);
|
|
|
|
}
|
|
|
|
|
2009-07-23 15:27:23 +02:00
|
|
|
req.dcid = cpu_to_le16(l2cap_pi(sk)->dcid);
|
|
|
|
req.scid = cpu_to_le16(l2cap_pi(sk)->scid);
|
|
|
|
l2cap_send_cmd(conn, l2cap_get_ident(conn),
|
|
|
|
L2CAP_DISCONN_REQ, sizeof(req), &req);
|
2010-05-14 01:50:12 +02:00
|
|
|
|
|
|
|
sk->sk_state = BT_DISCONN;
|
2010-05-20 21:21:53 +02:00
|
|
|
sk->sk_err = err;
|
2009-07-23 15:27:23 +02:00
|
|
|
}
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
/* ---- L2CAP connections ---- */
|
2007-10-20 13:37:56 +02:00
|
|
|
static void l2cap_conn_start(struct l2cap_conn *conn)
|
|
|
|
{
|
|
|
|
struct l2cap_chan_list *l = &conn->chan_list;
|
2010-06-08 01:54:45 +02:00
|
|
|
struct sock_del_list del, *tmp1, *tmp2;
|
2007-10-20 13:37:56 +02:00
|
|
|
struct sock *sk;
|
|
|
|
|
|
|
|
BT_DBG("conn %p", conn);
|
|
|
|
|
2010-06-08 01:54:45 +02:00
|
|
|
INIT_LIST_HEAD(&del.list);
|
|
|
|
|
2007-10-20 13:37:56 +02:00
|
|
|
read_lock(&l->lock);
|
|
|
|
|
|
|
|
for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) {
|
|
|
|
bh_lock_sock(sk);
|
|
|
|
|
2010-05-01 21:15:42 +02:00
|
|
|
if (sk->sk_type != SOCK_SEQPACKET &&
|
|
|
|
sk->sk_type != SOCK_STREAM) {
|
2008-07-14 20:13:44 +02:00
|
|
|
bh_unlock_sock(sk);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (sk->sk_state == BT_CONNECT) {
|
2010-07-09 21:38:35 +02:00
|
|
|
struct l2cap_conn_req req;
|
2008-07-14 20:13:44 +02:00
|
|
|
|
2010-07-09 21:38:35 +02:00
|
|
|
if (!l2cap_check_security(sk) ||
|
|
|
|
!__l2cap_no_conn_pending(sk)) {
|
|
|
|
bh_unlock_sock(sk);
|
|
|
|
continue;
|
|
|
|
}
|
2008-07-14 20:13:44 +02:00
|
|
|
|
2010-07-09 21:38:35 +02:00
|
|
|
if (!l2cap_mode_supported(l2cap_pi(sk)->mode,
|
|
|
|
conn->feat_mask)
|
|
|
|
&& l2cap_pi(sk)->conf_state &
|
|
|
|
L2CAP_CONF_STATE2_DEVICE) {
|
|
|
|
tmp1 = kzalloc(sizeof(struct sock_del_list),
|
|
|
|
GFP_ATOMIC);
|
|
|
|
tmp1->sk = sk;
|
|
|
|
list_add_tail(&tmp1->list, &del.list);
|
|
|
|
bh_unlock_sock(sk);
|
|
|
|
continue;
|
2008-07-14 20:13:54 +02:00
|
|
|
}
|
2010-07-09 21:38:35 +02:00
|
|
|
|
|
|
|
req.scid = cpu_to_le16(l2cap_pi(sk)->scid);
|
|
|
|
req.psm = l2cap_pi(sk)->psm;
|
|
|
|
|
|
|
|
l2cap_pi(sk)->ident = l2cap_get_ident(conn);
|
|
|
|
l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND;
|
|
|
|
|
|
|
|
l2cap_send_cmd(conn, l2cap_pi(sk)->ident,
|
|
|
|
L2CAP_CONN_REQ, sizeof(req), &req);
|
|
|
|
|
2008-07-14 20:13:44 +02:00
|
|
|
} else if (sk->sk_state == BT_CONNECT2) {
|
|
|
|
struct l2cap_conn_rsp rsp;
|
2010-07-09 01:08:18 +02:00
|
|
|
char buf[128];
|
2008-07-14 20:13:44 +02:00
|
|
|
rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid);
|
|
|
|
rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid);
|
|
|
|
|
2009-01-15 21:58:38 +01:00
|
|
|
if (l2cap_check_security(sk)) {
|
2009-01-15 21:57:00 +01:00
|
|
|
if (bt_sk(sk)->defer_setup) {
|
|
|
|
struct sock *parent = bt_sk(sk)->parent;
|
|
|
|
rsp.result = cpu_to_le16(L2CAP_CR_PEND);
|
|
|
|
rsp.status = cpu_to_le16(L2CAP_CS_AUTHOR_PEND);
|
|
|
|
parent->sk_data_ready(parent, 0);
|
|
|
|
|
|
|
|
} else {
|
|
|
|
sk->sk_state = BT_CONFIG;
|
|
|
|
rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS);
|
|
|
|
rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO);
|
|
|
|
}
|
2008-07-14 20:13:44 +02:00
|
|
|
} else {
|
|
|
|
rsp.result = cpu_to_le16(L2CAP_CR_PEND);
|
|
|
|
rsp.status = cpu_to_le16(L2CAP_CS_AUTHEN_PEND);
|
|
|
|
}
|
|
|
|
|
|
|
|
l2cap_send_cmd(conn, l2cap_pi(sk)->ident,
|
|
|
|
L2CAP_CONN_RSP, sizeof(rsp), &rsp);
|
2010-07-09 01:08:18 +02:00
|
|
|
|
|
|
|
if (l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT ||
|
|
|
|
rsp.result != L2CAP_CR_SUCCESS) {
|
|
|
|
bh_unlock_sock(sk);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT;
|
|
|
|
l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
|
|
|
|
l2cap_build_conf_req(sk, buf), buf);
|
|
|
|
l2cap_pi(sk)->num_conf_req++;
|
2007-10-20 13:37:56 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
bh_unlock_sock(sk);
|
|
|
|
}
|
|
|
|
|
|
|
|
read_unlock(&l->lock);
|
2010-06-08 01:54:45 +02:00
|
|
|
|
|
|
|
list_for_each_entry_safe(tmp1, tmp2, &del.list, list) {
|
|
|
|
bh_lock_sock(tmp1->sk);
|
|
|
|
__l2cap_sock_close(tmp1->sk, ECONNRESET);
|
|
|
|
bh_unlock_sock(tmp1->sk);
|
|
|
|
list_del(&tmp1->list);
|
|
|
|
kfree(tmp1);
|
|
|
|
}
|
2007-10-20 13:37:56 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
static void l2cap_conn_ready(struct l2cap_conn *conn)
|
|
|
|
{
|
2008-07-14 20:13:44 +02:00
|
|
|
struct l2cap_chan_list *l = &conn->chan_list;
|
|
|
|
struct sock *sk;
|
2007-10-20 13:37:56 +02:00
|
|
|
|
2008-07-14 20:13:44 +02:00
|
|
|
BT_DBG("conn %p", conn);
|
2007-10-20 13:37:56 +02:00
|
|
|
|
2008-07-14 20:13:44 +02:00
|
|
|
read_lock(&l->lock);
|
2007-10-20 13:37:56 +02:00
|
|
|
|
2008-07-14 20:13:44 +02:00
|
|
|
for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) {
|
|
|
|
bh_lock_sock(sk);
|
2007-10-20 13:37:56 +02:00
|
|
|
|
2010-05-01 21:15:42 +02:00
|
|
|
if (sk->sk_type != SOCK_SEQPACKET &&
|
|
|
|
sk->sk_type != SOCK_STREAM) {
|
2008-07-14 20:13:44 +02:00
|
|
|
l2cap_sock_clear_timer(sk);
|
|
|
|
sk->sk_state = BT_CONNECTED;
|
|
|
|
sk->sk_state_change(sk);
|
|
|
|
} else if (sk->sk_state == BT_CONNECT)
|
|
|
|
l2cap_do_start(sk);
|
2007-10-20 13:37:56 +02:00
|
|
|
|
2008-07-14 20:13:44 +02:00
|
|
|
bh_unlock_sock(sk);
|
2007-10-20 13:37:56 +02:00
|
|
|
}
|
2008-07-14 20:13:44 +02:00
|
|
|
|
|
|
|
read_unlock(&l->lock);
|
2007-10-20 13:37:56 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Notify sockets that we cannot guaranty reliability anymore */
|
|
|
|
static void l2cap_conn_unreliable(struct l2cap_conn *conn, int err)
|
|
|
|
{
|
|
|
|
struct l2cap_chan_list *l = &conn->chan_list;
|
|
|
|
struct sock *sk;
|
|
|
|
|
|
|
|
BT_DBG("conn %p", conn);
|
|
|
|
|
|
|
|
read_lock(&l->lock);
|
|
|
|
|
|
|
|
for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) {
|
2009-01-15 21:58:38 +01:00
|
|
|
if (l2cap_pi(sk)->force_reliable)
|
2007-10-20 13:37:56 +02:00
|
|
|
sk->sk_err = err;
|
|
|
|
}
|
|
|
|
|
|
|
|
read_unlock(&l->lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void l2cap_info_timeout(unsigned long arg)
|
|
|
|
{
|
|
|
|
struct l2cap_conn *conn = (void *) arg;
|
|
|
|
|
2009-02-06 23:35:19 +01:00
|
|
|
conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE;
|
2009-02-09 09:18:02 +01:00
|
|
|
conn->info_ident = 0;
|
2009-02-06 23:35:19 +01:00
|
|
|
|
2007-10-20 13:37:56 +02:00
|
|
|
l2cap_conn_start(conn);
|
|
|
|
}
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
static struct l2cap_conn *l2cap_conn_add(struct hci_conn *hcon, u8 status)
|
|
|
|
{
|
2006-07-03 10:02:46 +02:00
|
|
|
struct l2cap_conn *conn = hcon->l2cap_data;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2006-07-03 10:02:46 +02:00
|
|
|
if (conn || status)
|
2005-04-17 00:20:36 +02:00
|
|
|
return conn;
|
|
|
|
|
2006-07-03 10:02:46 +02:00
|
|
|
conn = kzalloc(sizeof(struct l2cap_conn), GFP_ATOMIC);
|
|
|
|
if (!conn)
|
2005-04-17 00:20:36 +02:00
|
|
|
return NULL;
|
|
|
|
|
|
|
|
hcon->l2cap_data = conn;
|
|
|
|
conn->hcon = hcon;
|
|
|
|
|
2006-07-03 10:02:46 +02:00
|
|
|
BT_DBG("hcon %p conn %p", hcon, conn);
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
conn->mtu = hcon->hdev->acl_mtu;
|
|
|
|
conn->src = &hcon->hdev->bdaddr;
|
|
|
|
conn->dst = &hcon->dst;
|
|
|
|
|
2007-10-20 13:37:56 +02:00
|
|
|
conn->feat_mask = 0;
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
spin_lock_init(&conn->lock);
|
|
|
|
rwlock_init(&conn->chan_list.lock);
|
|
|
|
|
2009-10-18 22:28:30 +02:00
|
|
|
setup_timer(&conn->info_timer, l2cap_info_timeout,
|
|
|
|
(unsigned long) conn);
|
|
|
|
|
2009-02-12 14:02:50 +01:00
|
|
|
conn->disc_reason = 0x13;
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
return conn;
|
|
|
|
}
|
|
|
|
|
2006-07-03 10:02:46 +02:00
|
|
|
static void l2cap_conn_del(struct hci_conn *hcon, int err)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
2006-07-03 10:02:46 +02:00
|
|
|
struct l2cap_conn *conn = hcon->l2cap_data;
|
2005-04-17 00:20:36 +02:00
|
|
|
struct sock *sk;
|
|
|
|
|
2006-07-03 10:02:46 +02:00
|
|
|
if (!conn)
|
|
|
|
return;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
|
|
|
|
|
2009-02-25 11:29:52 +01:00
|
|
|
kfree_skb(conn->rx_skb);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
/* Kill channels */
|
|
|
|
while ((sk = conn->chan_list.head)) {
|
|
|
|
bh_lock_sock(sk);
|
|
|
|
l2cap_chan_del(sk, err);
|
|
|
|
bh_unlock_sock(sk);
|
|
|
|
l2cap_sock_kill(sk);
|
|
|
|
}
|
|
|
|
|
2008-03-03 21:18:55 +01:00
|
|
|
if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT)
|
|
|
|
del_timer_sync(&conn->info_timer);
|
2008-02-27 02:42:56 +01:00
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
hcon->l2cap_data = NULL;
|
|
|
|
kfree(conn);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void l2cap_chan_add(struct l2cap_conn *conn, struct sock *sk, struct sock *parent)
|
|
|
|
{
|
|
|
|
struct l2cap_chan_list *l = &conn->chan_list;
|
2006-07-12 23:00:07 +02:00
|
|
|
write_lock_bh(&l->lock);
|
2005-04-17 00:20:36 +02:00
|
|
|
__l2cap_chan_add(conn, sk, parent);
|
2006-07-12 23:00:07 +02:00
|
|
|
write_unlock_bh(&l->lock);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
/* ---- Socket interface ---- */
|
|
|
|
|
|
|
|
/* Find socket with psm and source bdaddr.
|
|
|
|
* Returns closest match.
|
|
|
|
*/
|
2010-11-01 19:43:53 +01:00
|
|
|
static struct sock *l2cap_get_sock_by_psm(int state, __le16 psm, bdaddr_t *src)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
struct sock *sk = NULL, *sk1 = NULL;
|
|
|
|
struct hlist_node *node;
|
|
|
|
|
2010-11-01 19:43:53 +01:00
|
|
|
read_lock(&l2cap_sk_list.lock);
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
sk_for_each(sk, node, &l2cap_sk_list.head) {
|
|
|
|
if (state && sk->sk_state != state)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
if (l2cap_pi(sk)->psm == psm) {
|
|
|
|
/* Exact match. */
|
|
|
|
if (!bacmp(&bt_sk(sk)->src, src))
|
|
|
|
break;
|
|
|
|
|
|
|
|
/* Closest match */
|
|
|
|
if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY))
|
|
|
|
sk1 = sk;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
read_unlock(&l2cap_sk_list.lock);
|
2010-11-01 19:43:53 +01:00
|
|
|
|
|
|
|
return node ? sk : sk1;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
static void l2cap_sock_cleanup_listen(struct sock *parent)
|
|
|
|
{
|
|
|
|
struct sock *sk;
|
|
|
|
|
|
|
|
BT_DBG("parent %p", parent);
|
|
|
|
|
|
|
|
/* Close not yet accepted channels */
|
|
|
|
while ((sk = bt_accept_dequeue(parent, NULL)))
|
|
|
|
l2cap_sock_close(sk);
|
|
|
|
|
2008-07-14 20:13:54 +02:00
|
|
|
parent->sk_state = BT_CLOSED;
|
2005-04-17 00:20:36 +02:00
|
|
|
sock_set_flag(parent, SOCK_ZAPPED);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Kill socket (only if zapped and orphan)
|
|
|
|
* Must be called on unlocked socket.
|
|
|
|
*/
|
2011-02-03 23:50:35 +01:00
|
|
|
void l2cap_sock_kill(struct sock *sk)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket)
|
|
|
|
return;
|
|
|
|
|
|
|
|
BT_DBG("sk %p state %d", sk, sk->sk_state);
|
|
|
|
|
|
|
|
/* Kill poor orphan */
|
|
|
|
bt_sock_unlink(&l2cap_sk_list, sk);
|
|
|
|
sock_set_flag(sk, SOCK_DEAD);
|
|
|
|
sock_put(sk);
|
|
|
|
}
|
|
|
|
|
2011-02-03 23:50:35 +01:00
|
|
|
void __l2cap_sock_close(struct sock *sk, int reason)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket);
|
|
|
|
|
|
|
|
switch (sk->sk_state) {
|
|
|
|
case BT_LISTEN:
|
|
|
|
l2cap_sock_cleanup_listen(sk);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case BT_CONNECTED:
|
|
|
|
case BT_CONFIG:
|
2010-05-01 21:15:42 +02:00
|
|
|
if (sk->sk_type == SOCK_SEQPACKET ||
|
|
|
|
sk->sk_type == SOCK_STREAM) {
|
2005-04-17 00:20:36 +02:00
|
|
|
struct l2cap_conn *conn = l2cap_pi(sk)->conn;
|
|
|
|
|
|
|
|
l2cap_sock_set_timer(sk, sk->sk_sndtimeo);
|
2010-05-20 21:21:53 +02:00
|
|
|
l2cap_send_disconn_req(conn, sk, reason);
|
2008-07-14 20:13:54 +02:00
|
|
|
} else
|
2005-04-17 00:20:36 +02:00
|
|
|
l2cap_chan_del(sk, reason);
|
|
|
|
break;
|
|
|
|
|
2009-01-15 21:57:00 +01:00
|
|
|
case BT_CONNECT2:
|
2010-05-01 21:15:42 +02:00
|
|
|
if (sk->sk_type == SOCK_SEQPACKET ||
|
|
|
|
sk->sk_type == SOCK_STREAM) {
|
2009-01-15 21:57:00 +01:00
|
|
|
struct l2cap_conn *conn = l2cap_pi(sk)->conn;
|
|
|
|
struct l2cap_conn_rsp rsp;
|
|
|
|
__u16 result;
|
|
|
|
|
|
|
|
if (bt_sk(sk)->defer_setup)
|
|
|
|
result = L2CAP_CR_SEC_BLOCK;
|
|
|
|
else
|
|
|
|
result = L2CAP_CR_BAD_PSM;
|
2011-01-29 14:39:37 +01:00
|
|
|
sk->sk_state = BT_DISCONN;
|
2009-01-15 21:57:00 +01:00
|
|
|
|
|
|
|
rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid);
|
|
|
|
rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid);
|
|
|
|
rsp.result = cpu_to_le16(result);
|
|
|
|
rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO);
|
|
|
|
l2cap_send_cmd(conn, l2cap_pi(sk)->ident,
|
|
|
|
L2CAP_CONN_RSP, sizeof(rsp), &rsp);
|
|
|
|
} else
|
|
|
|
l2cap_chan_del(sk, reason);
|
|
|
|
break;
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
case BT_CONNECT:
|
|
|
|
case BT_DISCONN:
|
|
|
|
l2cap_chan_del(sk, reason);
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
sock_set_flag(sk, SOCK_ZAPPED);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Must be called on unlocked socket. */
|
|
|
|
static void l2cap_sock_close(struct sock *sk)
|
|
|
|
{
|
|
|
|
l2cap_sock_clear_timer(sk);
|
|
|
|
lock_sock(sk);
|
|
|
|
__l2cap_sock_close(sk, ECONNRESET);
|
|
|
|
release_sock(sk);
|
|
|
|
l2cap_sock_kill(sk);
|
|
|
|
}
|
|
|
|
|
2011-02-04 05:56:13 +01:00
|
|
|
int l2cap_do_connect(struct sock *sk)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
bdaddr_t *src = &bt_sk(sk)->src;
|
|
|
|
bdaddr_t *dst = &bt_sk(sk)->dst;
|
|
|
|
struct l2cap_conn *conn;
|
|
|
|
struct hci_conn *hcon;
|
|
|
|
struct hci_dev *hdev;
|
2008-09-09 07:19:20 +02:00
|
|
|
__u8 auth_type;
|
2009-04-20 07:09:16 +02:00
|
|
|
int err;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2009-02-12 05:07:45 +01:00
|
|
|
BT_DBG("%s -> %s psm 0x%2.2x", batostr(src), batostr(dst),
|
|
|
|
l2cap_pi(sk)->psm);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2009-04-20 06:31:08 +02:00
|
|
|
hdev = hci_get_route(dst, src);
|
|
|
|
if (!hdev)
|
2005-04-17 00:20:36 +02:00
|
|
|
return -EHOSTUNREACH;
|
|
|
|
|
|
|
|
hci_dev_lock_bh(hdev);
|
|
|
|
|
|
|
|
err = -ENOMEM;
|
|
|
|
|
2011-01-19 07:36:50 +01:00
|
|
|
auth_type = l2cap_get_auth_type(sk);
|
2008-09-09 07:19:20 +02:00
|
|
|
|
2009-01-15 21:58:38 +01:00
|
|
|
hcon = hci_connect(hdev, ACL_LINK, dst,
|
|
|
|
l2cap_pi(sk)->sec_level, auth_type);
|
2005-04-17 00:20:36 +02:00
|
|
|
if (!hcon)
|
|
|
|
goto done;
|
|
|
|
|
|
|
|
conn = l2cap_conn_add(hcon, 0);
|
|
|
|
if (!conn) {
|
|
|
|
hci_conn_put(hcon);
|
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
|
|
|
|
err = 0;
|
|
|
|
|
|
|
|
/* Update source addr of the socket */
|
|
|
|
bacpy(src, conn->src);
|
|
|
|
|
|
|
|
l2cap_chan_add(conn, sk, NULL);
|
|
|
|
|
|
|
|
sk->sk_state = BT_CONNECT;
|
|
|
|
l2cap_sock_set_timer(sk, sk->sk_sndtimeo);
|
|
|
|
|
|
|
|
if (hcon->state == BT_CONNECTED) {
|
2010-05-01 21:15:42 +02:00
|
|
|
if (sk->sk_type != SOCK_SEQPACKET &&
|
|
|
|
sk->sk_type != SOCK_STREAM) {
|
2005-04-17 00:20:36 +02:00
|
|
|
l2cap_sock_clear_timer(sk);
|
2011-01-19 07:36:51 +01:00
|
|
|
if (l2cap_check_security(sk))
|
|
|
|
sk->sk_state = BT_CONNECTED;
|
2008-07-14 20:13:44 +02:00
|
|
|
} else
|
|
|
|
l2cap_do_start(sk);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
done:
|
|
|
|
hci_dev_unlock_bh(hdev);
|
|
|
|
hci_dev_put(hdev);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2010-05-01 21:15:44 +02:00
|
|
|
static int __l2cap_wait_ack(struct sock *sk)
|
|
|
|
{
|
|
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
|
|
int err = 0;
|
|
|
|
int timeo = HZ/5;
|
|
|
|
|
2010-05-10 11:33:10 +02:00
|
|
|
add_wait_queue(sk_sleep(sk), &wait);
|
2010-05-01 21:15:44 +02:00
|
|
|
while ((l2cap_pi(sk)->unacked_frames > 0 && l2cap_pi(sk)->conn)) {
|
|
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
|
|
|
|
|
|
if (!timeo)
|
|
|
|
timeo = HZ/5;
|
|
|
|
|
|
|
|
if (signal_pending(current)) {
|
|
|
|
err = sock_intr_errno(timeo);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
release_sock(sk);
|
|
|
|
timeo = schedule_timeout(timeo);
|
|
|
|
lock_sock(sk);
|
|
|
|
|
|
|
|
err = sock_error(sk);
|
|
|
|
if (err)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
set_current_state(TASK_RUNNING);
|
2010-05-10 11:33:10 +02:00
|
|
|
remove_wait_queue(sk_sleep(sk), &wait);
|
2010-05-01 21:15:44 +02:00
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2009-08-21 03:26:00 +02:00
|
|
|
static void l2cap_monitor_timeout(unsigned long arg)
|
|
|
|
{
|
|
|
|
struct sock *sk = (void *) arg;
|
|
|
|
|
2010-04-19 19:45:38 +02:00
|
|
|
BT_DBG("sk %p", sk);
|
|
|
|
|
2009-08-24 05:45:19 +02:00
|
|
|
bh_lock_sock(sk);
|
2009-08-21 03:26:00 +02:00
|
|
|
if (l2cap_pi(sk)->retry_count >= l2cap_pi(sk)->remote_max_tx) {
|
2010-05-20 21:21:53 +02:00
|
|
|
l2cap_send_disconn_req(l2cap_pi(sk)->conn, sk, ECONNABORTED);
|
2009-12-15 10:38:04 +01:00
|
|
|
bh_unlock_sock(sk);
|
2009-08-21 03:26:00 +02:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
l2cap_pi(sk)->retry_count++;
|
|
|
|
__mod_monitor_timer();
|
|
|
|
|
2010-05-06 00:58:27 +02:00
|
|
|
l2cap_send_rr_or_rnr(l2cap_pi(sk), L2CAP_CTRL_POLL);
|
2009-08-24 05:45:19 +02:00
|
|
|
bh_unlock_sock(sk);
|
2009-08-21 03:26:00 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
static void l2cap_retrans_timeout(unsigned long arg)
|
|
|
|
{
|
|
|
|
struct sock *sk = (void *) arg;
|
|
|
|
|
2010-04-19 19:45:38 +02:00
|
|
|
BT_DBG("sk %p", sk);
|
|
|
|
|
2009-08-24 05:45:19 +02:00
|
|
|
bh_lock_sock(sk);
|
2009-08-21 03:26:00 +02:00
|
|
|
l2cap_pi(sk)->retry_count = 1;
|
|
|
|
__mod_monitor_timer();
|
|
|
|
|
|
|
|
l2cap_pi(sk)->conn_state |= L2CAP_CONN_WAIT_F;
|
|
|
|
|
2010-05-06 00:58:27 +02:00
|
|
|
l2cap_send_rr_or_rnr(l2cap_pi(sk), L2CAP_CTRL_POLL);
|
2009-08-24 05:45:19 +02:00
|
|
|
bh_unlock_sock(sk);
|
2009-08-21 03:26:00 +02:00
|
|
|
}
|
|
|
|
|
2009-08-21 03:25:57 +02:00
|
|
|
static void l2cap_drop_acked_frames(struct sock *sk)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
2009-08-21 03:25:57 +02:00
|
|
|
struct sk_buff *skb;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2010-05-01 21:15:42 +02:00
|
|
|
while ((skb = skb_peek(TX_QUEUE(sk))) &&
|
|
|
|
l2cap_pi(sk)->unacked_frames) {
|
2009-08-21 03:25:57 +02:00
|
|
|
if (bt_cb(skb)->tx_seq == l2cap_pi(sk)->expected_ack_seq)
|
|
|
|
break;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2009-08-21 03:25:57 +02:00
|
|
|
skb = skb_dequeue(TX_QUEUE(sk));
|
|
|
|
kfree_skb(skb);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2009-08-21 03:25:57 +02:00
|
|
|
l2cap_pi(sk)->unacked_frames--;
|
|
|
|
}
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2009-08-21 03:26:00 +02:00
|
|
|
if (!l2cap_pi(sk)->unacked_frames)
|
|
|
|
del_timer(&l2cap_pi(sk)->retrans_timer);
|
2009-08-21 03:25:57 +02:00
|
|
|
}
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2010-05-01 21:15:43 +02:00
|
|
|
static inline void l2cap_do_send(struct sock *sk, struct sk_buff *skb)
|
2009-08-21 03:25:57 +02:00
|
|
|
{
|
|
|
|
struct l2cap_pinfo *pi = l2cap_pi(sk);
|
2011-01-03 10:14:36 +01:00
|
|
|
struct hci_conn *hcon = pi->conn->hcon;
|
|
|
|
u16 flags;
|
2009-08-21 03:25:57 +02:00
|
|
|
|
|
|
|
BT_DBG("sk %p, skb %p len %d", sk, skb, skb->len);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2011-01-03 10:14:36 +01:00
|
|
|
if (!pi->flushable && lmp_no_flush_capable(hcon->hdev))
|
|
|
|
flags = ACL_START_NO_FLUSH;
|
|
|
|
else
|
|
|
|
flags = ACL_START;
|
|
|
|
|
|
|
|
hci_send_acl(hcon, skb, flags);
|
2009-08-21 03:25:57 +02:00
|
|
|
}
|
|
|
|
|
2010-06-22 18:56:23 +02:00
|
|
|
static void l2cap_streaming_send(struct sock *sk)
|
2009-08-21 03:26:01 +02:00
|
|
|
{
|
2010-08-30 23:44:44 +02:00
|
|
|
struct sk_buff *skb;
|
2009-08-21 03:26:01 +02:00
|
|
|
struct l2cap_pinfo *pi = l2cap_pi(sk);
|
2009-08-21 03:26:02 +02:00
|
|
|
u16 control, fcs;
|
2009-08-21 03:26:01 +02:00
|
|
|
|
2010-08-30 23:44:44 +02:00
|
|
|
while ((skb = skb_dequeue(TX_QUEUE(sk)))) {
|
|
|
|
control = get_unaligned_le16(skb->data + L2CAP_HDR_SIZE);
|
2009-08-21 03:26:01 +02:00
|
|
|
control |= pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT;
|
2010-08-30 23:44:44 +02:00
|
|
|
put_unaligned_le16(control, skb->data + L2CAP_HDR_SIZE);
|
2009-08-21 03:26:01 +02:00
|
|
|
|
2010-05-01 21:15:36 +02:00
|
|
|
if (pi->fcs == L2CAP_FCS_CRC16) {
|
2010-08-30 23:44:44 +02:00
|
|
|
fcs = crc16(0, (u8 *)skb->data, skb->len - 2);
|
|
|
|
put_unaligned_le16(fcs, skb->data + skb->len - 2);
|
2009-08-21 03:26:02 +02:00
|
|
|
}
|
|
|
|
|
2010-08-30 23:44:44 +02:00
|
|
|
l2cap_do_send(sk, skb);
|
2009-08-21 03:26:01 +02:00
|
|
|
|
|
|
|
pi->next_tx_seq = (pi->next_tx_seq + 1) % 64;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2010-05-01 21:15:45 +02:00
|
|
|
static void l2cap_retransmit_one_frame(struct sock *sk, u8 tx_seq)
|
2009-08-21 03:26:03 +02:00
|
|
|
{
|
|
|
|
struct l2cap_pinfo *pi = l2cap_pi(sk);
|
|
|
|
struct sk_buff *skb, *tx_skb;
|
|
|
|
u16 control, fcs;
|
|
|
|
|
|
|
|
skb = skb_peek(TX_QUEUE(sk));
|
2010-05-01 21:15:44 +02:00
|
|
|
if (!skb)
|
|
|
|
return;
|
2009-08-21 03:26:03 +02:00
|
|
|
|
2010-05-01 21:15:44 +02:00
|
|
|
do {
|
|
|
|
if (bt_cb(skb)->tx_seq == tx_seq)
|
2009-08-21 03:26:03 +02:00
|
|
|
break;
|
|
|
|
|
2010-05-01 21:15:44 +02:00
|
|
|
if (skb_queue_is_last(TX_QUEUE(sk), skb))
|
|
|
|
return;
|
2009-08-21 03:26:03 +02:00
|
|
|
|
2010-05-01 21:15:44 +02:00
|
|
|
} while ((skb = skb_queue_next(TX_QUEUE(sk), skb)));
|
2009-08-21 03:26:03 +02:00
|
|
|
|
2010-05-01 21:15:44 +02:00
|
|
|
if (pi->remote_max_tx &&
|
|
|
|
bt_cb(skb)->retries == pi->remote_max_tx) {
|
2010-05-20 21:21:53 +02:00
|
|
|
l2cap_send_disconn_req(pi->conn, sk, ECONNABORTED);
|
2010-05-01 21:15:44 +02:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
tx_skb = skb_clone(skb, GFP_ATOMIC);
|
|
|
|
bt_cb(skb)->retries++;
|
|
|
|
control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE);
|
2010-05-29 07:24:35 +02:00
|
|
|
|
|
|
|
if (pi->conn_state & L2CAP_CONN_SEND_FBIT) {
|
|
|
|
control |= L2CAP_CTRL_FINAL;
|
|
|
|
pi->conn_state &= ~L2CAP_CONN_SEND_FBIT;
|
|
|
|
}
|
2010-06-19 01:37:33 +02:00
|
|
|
|
2010-05-01 21:15:44 +02:00
|
|
|
control |= (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT)
|
|
|
|
| (tx_seq << L2CAP_CTRL_TXSEQ_SHIFT);
|
2010-05-29 07:24:35 +02:00
|
|
|
|
2010-05-01 21:15:44 +02:00
|
|
|
put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE);
|
|
|
|
|
|
|
|
if (pi->fcs == L2CAP_FCS_CRC16) {
|
|
|
|
fcs = crc16(0, (u8 *)tx_skb->data, tx_skb->len - 2);
|
|
|
|
put_unaligned_le16(fcs, tx_skb->data + tx_skb->len - 2);
|
|
|
|
}
|
|
|
|
|
|
|
|
l2cap_do_send(sk, tx_skb);
|
2009-08-21 03:26:03 +02:00
|
|
|
}
|
|
|
|
|
2009-08-21 03:25:57 +02:00
|
|
|
static int l2cap_ertm_send(struct sock *sk)
|
|
|
|
{
|
|
|
|
struct sk_buff *skb, *tx_skb;
|
|
|
|
struct l2cap_pinfo *pi = l2cap_pi(sk);
|
2009-08-21 03:26:02 +02:00
|
|
|
u16 control, fcs;
|
2010-05-01 21:15:43 +02:00
|
|
|
int nsent = 0;
|
2009-08-21 03:25:57 +02:00
|
|
|
|
2010-05-14 01:50:12 +02:00
|
|
|
if (sk->sk_state != BT_CONNECTED)
|
|
|
|
return -ENOTCONN;
|
2009-08-21 03:26:00 +02:00
|
|
|
|
2010-06-01 23:52:58 +02:00
|
|
|
while ((skb = sk->sk_send_head) && (!l2cap_tx_window_full(sk))) {
|
2009-08-21 03:25:57 +02:00
|
|
|
|
2009-08-21 03:26:00 +02:00
|
|
|
if (pi->remote_max_tx &&
|
|
|
|
bt_cb(skb)->retries == pi->remote_max_tx) {
|
2010-05-20 21:21:53 +02:00
|
|
|
l2cap_send_disconn_req(pi->conn, sk, ECONNABORTED);
|
2009-08-21 03:26:00 +02:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2009-12-23 12:07:14 +01:00
|
|
|
tx_skb = skb_clone(skb, GFP_ATOMIC);
|
|
|
|
|
2009-08-21 03:26:00 +02:00
|
|
|
bt_cb(skb)->retries++;
|
|
|
|
|
2009-08-21 03:25:57 +02:00
|
|
|
control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE);
|
2010-06-19 01:37:33 +02:00
|
|
|
control &= L2CAP_CTRL_SAR;
|
|
|
|
|
2010-05-01 21:15:36 +02:00
|
|
|
if (pi->conn_state & L2CAP_CONN_SEND_FBIT) {
|
|
|
|
control |= L2CAP_CTRL_FINAL;
|
|
|
|
pi->conn_state &= ~L2CAP_CONN_SEND_FBIT;
|
|
|
|
}
|
2009-10-03 07:34:38 +02:00
|
|
|
control |= (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT)
|
2009-08-21 03:25:57 +02:00
|
|
|
| (pi->next_tx_seq << L2CAP_CTRL_TXSEQ_SHIFT);
|
|
|
|
put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE);
|
|
|
|
|
2009-08-21 03:26:00 +02:00
|
|
|
|
2010-05-01 21:15:36 +02:00
|
|
|
if (pi->fcs == L2CAP_FCS_CRC16) {
|
2009-08-21 03:26:02 +02:00
|
|
|
fcs = crc16(0, (u8 *)skb->data, tx_skb->len - 2);
|
|
|
|
put_unaligned_le16(fcs, skb->data + tx_skb->len - 2);
|
|
|
|
}
|
|
|
|
|
2010-05-01 21:15:43 +02:00
|
|
|
l2cap_do_send(sk, tx_skb);
|
|
|
|
|
2009-08-21 03:26:00 +02:00
|
|
|
__mod_retrans_timer();
|
2009-08-21 03:25:57 +02:00
|
|
|
|
|
|
|
bt_cb(skb)->tx_seq = pi->next_tx_seq;
|
|
|
|
pi->next_tx_seq = (pi->next_tx_seq + 1) % 64;
|
|
|
|
|
|
|
|
pi->unacked_frames++;
|
2010-05-01 21:15:36 +02:00
|
|
|
pi->frames_sent++;
|
2009-08-21 03:25:57 +02:00
|
|
|
|
|
|
|
if (skb_queue_is_last(TX_QUEUE(sk), skb))
|
|
|
|
sk->sk_send_head = NULL;
|
|
|
|
else
|
|
|
|
sk->sk_send_head = skb_queue_next(TX_QUEUE(sk), skb);
|
2010-05-01 21:15:37 +02:00
|
|
|
|
|
|
|
nsent++;
|
2009-08-21 03:25:57 +02:00
|
|
|
}
|
|
|
|
|
2010-05-01 21:15:37 +02:00
|
|
|
return nsent;
|
|
|
|
}
|
|
|
|
|
2010-05-01 21:15:45 +02:00
|
|
|
static int l2cap_retransmit_frames(struct sock *sk)
|
|
|
|
{
|
|
|
|
struct l2cap_pinfo *pi = l2cap_pi(sk);
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (!skb_queue_empty(TX_QUEUE(sk)))
|
|
|
|
sk->sk_send_head = TX_QUEUE(sk)->next;
|
|
|
|
|
|
|
|
pi->next_tx_seq = pi->expected_ack_seq;
|
|
|
|
ret = l2cap_ertm_send(sk);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2010-05-01 21:15:43 +02:00
|
|
|
static void l2cap_send_ack(struct l2cap_pinfo *pi)
|
2010-05-01 21:15:37 +02:00
|
|
|
{
|
|
|
|
struct sock *sk = (struct sock *)pi;
|
|
|
|
u16 control = 0;
|
|
|
|
|
|
|
|
control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT;
|
|
|
|
|
|
|
|
if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) {
|
|
|
|
control |= L2CAP_SUPER_RCV_NOT_READY;
|
2010-05-01 21:15:44 +02:00
|
|
|
pi->conn_state |= L2CAP_CONN_RNR_SENT;
|
2010-05-01 21:15:43 +02:00
|
|
|
l2cap_send_sframe(pi, control);
|
|
|
|
return;
|
2010-05-01 21:15:37 +02:00
|
|
|
}
|
2010-05-01 21:15:45 +02:00
|
|
|
|
2010-06-21 23:50:49 +02:00
|
|
|
if (l2cap_ertm_send(sk) > 0)
|
2010-05-01 21:15:45 +02:00
|
|
|
return;
|
|
|
|
|
|
|
|
control |= L2CAP_SUPER_RCV_READY;
|
|
|
|
l2cap_send_sframe(pi, control);
|
2009-08-21 03:25:57 +02:00
|
|
|
}
|
|
|
|
|
2010-05-01 21:15:43 +02:00
|
|
|
static void l2cap_send_srejtail(struct sock *sk)
|
2010-05-01 21:15:38 +02:00
|
|
|
{
|
|
|
|
struct srej_list *tail;
|
|
|
|
u16 control;
|
|
|
|
|
|
|
|
control = L2CAP_SUPER_SELECT_REJECT;
|
|
|
|
control |= L2CAP_CTRL_FINAL;
|
|
|
|
|
|
|
|
tail = list_entry(SREJ_LIST(sk)->prev, struct srej_list, list);
|
|
|
|
control |= tail->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT;
|
|
|
|
|
|
|
|
l2cap_send_sframe(l2cap_pi(sk), control);
|
|
|
|
}
|
|
|
|
|
2009-08-21 03:25:57 +02:00
|
|
|
static inline int l2cap_skbuff_fromiovec(struct sock *sk, struct msghdr *msg, int len, int count, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
struct l2cap_conn *conn = l2cap_pi(sk)->conn;
|
|
|
|
struct sk_buff **frag;
|
|
|
|
int err, sent = 0;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2010-05-01 21:15:43 +02:00
|
|
|
if (memcpy_fromiovec(skb_put(skb, count), msg->msg_iov, count))
|
2009-08-21 03:25:57 +02:00
|
|
|
return -EFAULT;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
sent += count;
|
|
|
|
len -= count;
|
|
|
|
|
|
|
|
/* Continuation fragments (no L2CAP header) */
|
|
|
|
frag = &skb_shinfo(skb)->frag_list;
|
|
|
|
while (len) {
|
|
|
|
count = min_t(unsigned int, conn->mtu, len);
|
|
|
|
|
|
|
|
*frag = bt_skb_send_alloc(sk, count, msg->msg_flags & MSG_DONTWAIT, &err);
|
|
|
|
if (!*frag)
|
2010-09-25 01:30:57 +02:00
|
|
|
return err;
|
2009-08-21 03:25:57 +02:00
|
|
|
if (memcpy_fromiovec(skb_put(*frag, count), msg->msg_iov, count))
|
|
|
|
return -EFAULT;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
sent += count;
|
|
|
|
len -= count;
|
|
|
|
|
|
|
|
frag = &(*frag)->next;
|
|
|
|
}
|
|
|
|
|
|
|
|
return sent;
|
2009-08-21 03:25:57 +02:00
|
|
|
}
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2009-08-21 03:25:57 +02:00
|
|
|
static struct sk_buff *l2cap_create_connless_pdu(struct sock *sk, struct msghdr *msg, size_t len)
|
|
|
|
{
|
|
|
|
struct l2cap_conn *conn = l2cap_pi(sk)->conn;
|
|
|
|
struct sk_buff *skb;
|
|
|
|
int err, count, hlen = L2CAP_HDR_SIZE + 2;
|
|
|
|
struct l2cap_hdr *lh;
|
|
|
|
|
|
|
|
BT_DBG("sk %p len %d", sk, (int)len);
|
|
|
|
|
|
|
|
count = min_t(unsigned int, (conn->mtu - hlen), len);
|
|
|
|
skb = bt_skb_send_alloc(sk, count + hlen,
|
|
|
|
msg->msg_flags & MSG_DONTWAIT, &err);
|
|
|
|
if (!skb)
|
2010-09-25 01:30:57 +02:00
|
|
|
return ERR_PTR(err);
|
2009-08-21 03:25:57 +02:00
|
|
|
|
|
|
|
/* Create L2CAP header */
|
|
|
|
lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE);
|
|
|
|
lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid);
|
|
|
|
lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE));
|
|
|
|
put_unaligned_le16(l2cap_pi(sk)->psm, skb_put(skb, 2));
|
|
|
|
|
|
|
|
err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb);
|
|
|
|
if (unlikely(err < 0)) {
|
|
|
|
kfree_skb(skb);
|
|
|
|
return ERR_PTR(err);
|
|
|
|
}
|
|
|
|
return skb;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct sk_buff *l2cap_create_basic_pdu(struct sock *sk, struct msghdr *msg, size_t len)
|
|
|
|
{
|
|
|
|
struct l2cap_conn *conn = l2cap_pi(sk)->conn;
|
|
|
|
struct sk_buff *skb;
|
|
|
|
int err, count, hlen = L2CAP_HDR_SIZE;
|
|
|
|
struct l2cap_hdr *lh;
|
|
|
|
|
|
|
|
BT_DBG("sk %p len %d", sk, (int)len);
|
|
|
|
|
|
|
|
count = min_t(unsigned int, (conn->mtu - hlen), len);
|
|
|
|
skb = bt_skb_send_alloc(sk, count + hlen,
|
|
|
|
msg->msg_flags & MSG_DONTWAIT, &err);
|
|
|
|
if (!skb)
|
2010-09-25 01:30:57 +02:00
|
|
|
return ERR_PTR(err);
|
2009-08-21 03:25:57 +02:00
|
|
|
|
|
|
|
/* Create L2CAP header */
|
|
|
|
lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE);
|
|
|
|
lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid);
|
|
|
|
lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE));
|
|
|
|
|
|
|
|
err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb);
|
|
|
|
if (unlikely(err < 0)) {
|
|
|
|
kfree_skb(skb);
|
|
|
|
return ERR_PTR(err);
|
|
|
|
}
|
|
|
|
return skb;
|
|
|
|
}
|
|
|
|
|
2009-08-21 03:26:01 +02:00
|
|
|
static struct sk_buff *l2cap_create_iframe_pdu(struct sock *sk, struct msghdr *msg, size_t len, u16 control, u16 sdulen)
|
2009-08-21 03:25:57 +02:00
|
|
|
{
|
|
|
|
struct l2cap_conn *conn = l2cap_pi(sk)->conn;
|
|
|
|
struct sk_buff *skb;
|
|
|
|
int err, count, hlen = L2CAP_HDR_SIZE + 2;
|
|
|
|
struct l2cap_hdr *lh;
|
|
|
|
|
|
|
|
BT_DBG("sk %p len %d", sk, (int)len);
|
|
|
|
|
2010-05-01 21:15:41 +02:00
|
|
|
if (!conn)
|
|
|
|
return ERR_PTR(-ENOTCONN);
|
|
|
|
|
2009-08-21 03:25:58 +02:00
|
|
|
if (sdulen)
|
|
|
|
hlen += 2;
|
|
|
|
|
2009-08-21 03:26:02 +02:00
|
|
|
if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16)
|
|
|
|
hlen += 2;
|
|
|
|
|
2009-08-21 03:25:57 +02:00
|
|
|
count = min_t(unsigned int, (conn->mtu - hlen), len);
|
|
|
|
skb = bt_skb_send_alloc(sk, count + hlen,
|
|
|
|
msg->msg_flags & MSG_DONTWAIT, &err);
|
|
|
|
if (!skb)
|
2010-09-25 01:30:57 +02:00
|
|
|
return ERR_PTR(err);
|
2009-08-21 03:25:57 +02:00
|
|
|
|
|
|
|
/* Create L2CAP header */
|
|
|
|
lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE);
|
|
|
|
lh->cid = cpu_to_le16(l2cap_pi(sk)->dcid);
|
|
|
|
lh->len = cpu_to_le16(len + (hlen - L2CAP_HDR_SIZE));
|
|
|
|
put_unaligned_le16(control, skb_put(skb, 2));
|
2009-08-21 03:25:58 +02:00
|
|
|
if (sdulen)
|
|
|
|
put_unaligned_le16(sdulen, skb_put(skb, 2));
|
2009-08-21 03:25:57 +02:00
|
|
|
|
|
|
|
err = l2cap_skbuff_fromiovec(sk, msg, len, count, skb);
|
|
|
|
if (unlikely(err < 0)) {
|
|
|
|
kfree_skb(skb);
|
|
|
|
return ERR_PTR(err);
|
|
|
|
}
|
2009-08-21 03:26:00 +02:00
|
|
|
|
2009-08-21 03:26:02 +02:00
|
|
|
if (l2cap_pi(sk)->fcs == L2CAP_FCS_CRC16)
|
|
|
|
put_unaligned_le16(0, skb_put(skb, 2));
|
|
|
|
|
2009-08-21 03:26:00 +02:00
|
|
|
bt_cb(skb)->retries = 0;
|
2009-08-21 03:25:57 +02:00
|
|
|
return skb;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
2009-08-21 03:25:58 +02:00
|
|
|
static inline int l2cap_sar_segment_sdu(struct sock *sk, struct msghdr *msg, size_t len)
|
|
|
|
{
|
|
|
|
struct l2cap_pinfo *pi = l2cap_pi(sk);
|
|
|
|
struct sk_buff *skb;
|
|
|
|
struct sk_buff_head sar_queue;
|
|
|
|
u16 control;
|
|
|
|
size_t size = 0;
|
|
|
|
|
2010-05-06 03:09:15 +02:00
|
|
|
skb_queue_head_init(&sar_queue);
|
2009-08-21 03:25:58 +02:00
|
|
|
control = L2CAP_SDU_START;
|
2010-05-01 21:15:40 +02:00
|
|
|
skb = l2cap_create_iframe_pdu(sk, msg, pi->remote_mps, control, len);
|
2009-08-21 03:25:58 +02:00
|
|
|
if (IS_ERR(skb))
|
|
|
|
return PTR_ERR(skb);
|
|
|
|
|
|
|
|
__skb_queue_tail(&sar_queue, skb);
|
2010-05-01 21:15:40 +02:00
|
|
|
len -= pi->remote_mps;
|
|
|
|
size += pi->remote_mps;
|
2009-08-21 03:25:58 +02:00
|
|
|
|
|
|
|
while (len > 0) {
|
|
|
|
size_t buflen;
|
|
|
|
|
2010-05-01 21:15:40 +02:00
|
|
|
if (len > pi->remote_mps) {
|
2010-05-01 21:15:43 +02:00
|
|
|
control = L2CAP_SDU_CONTINUE;
|
2010-05-01 21:15:40 +02:00
|
|
|
buflen = pi->remote_mps;
|
2009-08-21 03:25:58 +02:00
|
|
|
} else {
|
2010-05-01 21:15:43 +02:00
|
|
|
control = L2CAP_SDU_END;
|
2009-08-21 03:25:58 +02:00
|
|
|
buflen = len;
|
|
|
|
}
|
|
|
|
|
2009-08-21 03:26:01 +02:00
|
|
|
skb = l2cap_create_iframe_pdu(sk, msg, buflen, control, 0);
|
2009-08-21 03:25:58 +02:00
|
|
|
if (IS_ERR(skb)) {
|
|
|
|
skb_queue_purge(&sar_queue);
|
|
|
|
return PTR_ERR(skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
__skb_queue_tail(&sar_queue, skb);
|
|
|
|
len -= buflen;
|
|
|
|
size += buflen;
|
|
|
|
}
|
|
|
|
skb_queue_splice_tail(&sar_queue, TX_QUEUE(sk));
|
|
|
|
if (sk->sk_send_head == NULL)
|
|
|
|
sk->sk_send_head = sar_queue.next;
|
|
|
|
|
|
|
|
return size;
|
|
|
|
}
|
|
|
|
|
2011-02-04 05:33:56 +01:00
|
|
|
int l2cap_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
struct sock *sk = sock->sk;
|
2009-08-21 03:25:57 +02:00
|
|
|
struct l2cap_pinfo *pi = l2cap_pi(sk);
|
|
|
|
struct sk_buff *skb;
|
|
|
|
u16 control;
|
|
|
|
int err;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
BT_DBG("sock %p, sk %p", sock, sk);
|
|
|
|
|
2005-12-14 08:22:19 +01:00
|
|
|
err = sock_error(sk);
|
|
|
|
if (err)
|
|
|
|
return err;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
if (msg->msg_flags & MSG_OOB)
|
|
|
|
return -EOPNOTSUPP;
|
|
|
|
|
|
|
|
lock_sock(sk);
|
|
|
|
|
2009-08-21 03:25:57 +02:00
|
|
|
if (sk->sk_state != BT_CONNECTED) {
|
2005-04-17 00:20:36 +02:00
|
|
|
err = -ENOTCONN;
|
2009-08-21 03:25:57 +02:00
|
|
|
goto done;
|
|
|
|
}
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2009-08-21 03:25:57 +02:00
|
|
|
/* Connectionless channel */
|
|
|
|
if (sk->sk_type == SOCK_DGRAM) {
|
|
|
|
skb = l2cap_create_connless_pdu(sk, msg, len);
|
2010-05-01 21:15:43 +02:00
|
|
|
if (IS_ERR(skb)) {
|
2010-04-22 01:52:01 +02:00
|
|
|
err = PTR_ERR(skb);
|
2010-05-01 21:15:43 +02:00
|
|
|
} else {
|
|
|
|
l2cap_do_send(sk, skb);
|
|
|
|
err = len;
|
|
|
|
}
|
2009-08-21 03:25:57 +02:00
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
|
|
|
|
switch (pi->mode) {
|
|
|
|
case L2CAP_MODE_BASIC:
|
2010-05-01 21:15:35 +02:00
|
|
|
/* Check outgoing MTU */
|
|
|
|
if (len > pi->omtu) {
|
2010-06-22 18:56:24 +02:00
|
|
|
err = -EMSGSIZE;
|
2010-05-01 21:15:35 +02:00
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
|
2009-08-21 03:25:57 +02:00
|
|
|
/* Create a basic PDU */
|
|
|
|
skb = l2cap_create_basic_pdu(sk, msg, len);
|
|
|
|
if (IS_ERR(skb)) {
|
|
|
|
err = PTR_ERR(skb);
|
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
|
2010-05-01 21:15:43 +02:00
|
|
|
l2cap_do_send(sk, skb);
|
|
|
|
err = len;
|
2009-08-21 03:25:57 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_MODE_ERTM:
|
2009-08-21 03:26:01 +02:00
|
|
|
case L2CAP_MODE_STREAMING:
|
2009-08-21 03:25:57 +02:00
|
|
|
/* Entire SDU fits into one PDU */
|
2010-05-01 21:15:40 +02:00
|
|
|
if (len <= pi->remote_mps) {
|
2009-08-21 03:25:57 +02:00
|
|
|
control = L2CAP_SDU_UNSEGMENTED;
|
2009-08-21 03:26:01 +02:00
|
|
|
skb = l2cap_create_iframe_pdu(sk, msg, len, control, 0);
|
2009-08-21 03:25:57 +02:00
|
|
|
if (IS_ERR(skb)) {
|
|
|
|
err = PTR_ERR(skb);
|
|
|
|
goto done;
|
|
|
|
}
|
2009-08-21 03:25:58 +02:00
|
|
|
__skb_queue_tail(TX_QUEUE(sk), skb);
|
2010-05-01 21:15:45 +02:00
|
|
|
|
2009-08-21 03:25:58 +02:00
|
|
|
if (sk->sk_send_head == NULL)
|
|
|
|
sk->sk_send_head = skb;
|
2010-05-01 21:15:45 +02:00
|
|
|
|
2009-08-21 03:25:57 +02:00
|
|
|
} else {
|
2009-08-21 03:25:58 +02:00
|
|
|
/* Segment SDU into multiples PDUs */
|
|
|
|
err = l2cap_sar_segment_sdu(sk, msg, len);
|
|
|
|
if (err < 0)
|
|
|
|
goto done;
|
2009-08-21 03:25:57 +02:00
|
|
|
}
|
|
|
|
|
2010-05-01 21:15:45 +02:00
|
|
|
if (pi->mode == L2CAP_MODE_STREAMING) {
|
2010-06-22 18:56:23 +02:00
|
|
|
l2cap_streaming_send(sk);
|
2010-05-01 21:15:45 +02:00
|
|
|
} else {
|
2011-01-14 14:59:44 +01:00
|
|
|
if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY) &&
|
|
|
|
(pi->conn_state & L2CAP_CONN_WAIT_F)) {
|
2010-06-01 23:52:58 +02:00
|
|
|
err = len;
|
|
|
|
break;
|
|
|
|
}
|
2009-08-21 03:26:01 +02:00
|
|
|
err = l2cap_ertm_send(sk);
|
2010-05-01 21:15:45 +02:00
|
|
|
}
|
2009-08-21 03:26:01 +02:00
|
|
|
|
2010-05-01 21:15:37 +02:00
|
|
|
if (err >= 0)
|
2009-08-21 03:25:57 +02:00
|
|
|
err = len;
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
BT_DBG("bad state %1.1x", pi->mode);
|
2010-06-22 18:56:25 +02:00
|
|
|
err = -EBADFD;
|
2009-08-21 03:25:57 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
done:
|
2005-04-17 00:20:36 +02:00
|
|
|
release_sock(sk);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2011-02-04 05:33:56 +01:00
|
|
|
int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, size_t len, int flags)
|
2009-01-15 21:57:00 +01:00
|
|
|
{
|
|
|
|
struct sock *sk = sock->sk;
|
|
|
|
|
|
|
|
lock_sock(sk);
|
|
|
|
|
|
|
|
if (sk->sk_state == BT_CONNECT2 && bt_sk(sk)->defer_setup) {
|
|
|
|
struct l2cap_conn_rsp rsp;
|
2010-07-09 01:08:18 +02:00
|
|
|
struct l2cap_conn *conn = l2cap_pi(sk)->conn;
|
|
|
|
u8 buf[128];
|
2009-01-15 21:57:00 +01:00
|
|
|
|
|
|
|
sk->sk_state = BT_CONFIG;
|
|
|
|
|
|
|
|
rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid);
|
|
|
|
rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid);
|
|
|
|
rsp.result = cpu_to_le16(L2CAP_CR_SUCCESS);
|
|
|
|
rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO);
|
|
|
|
l2cap_send_cmd(l2cap_pi(sk)->conn, l2cap_pi(sk)->ident,
|
|
|
|
L2CAP_CONN_RSP, sizeof(rsp), &rsp);
|
|
|
|
|
2010-07-09 01:08:18 +02:00
|
|
|
if (l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT) {
|
|
|
|
release_sock(sk);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT;
|
|
|
|
l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
|
|
|
|
l2cap_build_conf_req(sk, buf), buf);
|
|
|
|
l2cap_pi(sk)->num_conf_req++;
|
|
|
|
|
2009-01-15 21:57:00 +01:00
|
|
|
release_sock(sk);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
release_sock(sk);
|
|
|
|
|
2010-09-08 19:05:29 +02:00
|
|
|
if (sock->type == SOCK_STREAM)
|
|
|
|
return bt_sock_stream_recvmsg(iocb, sock, msg, len, flags);
|
|
|
|
|
2009-01-15 21:57:00 +01:00
|
|
|
return bt_sock_recvmsg(iocb, sock, msg, len, flags);
|
|
|
|
}
|
|
|
|
|
2011-02-04 05:33:56 +01:00
|
|
|
int l2cap_sock_shutdown(struct socket *sock, int how)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
struct sock *sk = sock->sk;
|
|
|
|
int err = 0;
|
|
|
|
|
|
|
|
BT_DBG("sock %p, sk %p", sock, sk);
|
|
|
|
|
|
|
|
if (!sk)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
lock_sock(sk);
|
|
|
|
if (!sk->sk_shutdown) {
|
2010-05-01 21:15:44 +02:00
|
|
|
if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM)
|
|
|
|
err = __l2cap_wait_ack(sk);
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
sk->sk_shutdown = SHUTDOWN_MASK;
|
|
|
|
l2cap_sock_clear_timer(sk);
|
|
|
|
__l2cap_sock_close(sk, 0);
|
|
|
|
|
|
|
|
if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime)
|
2008-07-14 20:13:54 +02:00
|
|
|
err = bt_sock_wait_state(sk, BT_CLOSED,
|
|
|
|
sk->sk_lingertime);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
2010-05-20 21:21:53 +02:00
|
|
|
|
|
|
|
if (!err && sk->sk_err)
|
|
|
|
err = -sk->sk_err;
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
release_sock(sk);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void l2cap_chan_ready(struct sock *sk)
|
|
|
|
{
|
|
|
|
struct sock *parent = bt_sk(sk)->parent;
|
|
|
|
|
|
|
|
BT_DBG("sk %p, parent %p", sk, parent);
|
|
|
|
|
|
|
|
l2cap_pi(sk)->conf_state = 0;
|
|
|
|
l2cap_sock_clear_timer(sk);
|
|
|
|
|
|
|
|
if (!parent) {
|
|
|
|
/* Outgoing channel.
|
|
|
|
* Wake up socket sleeping on connect.
|
|
|
|
*/
|
|
|
|
sk->sk_state = BT_CONNECTED;
|
|
|
|
sk->sk_state_change(sk);
|
|
|
|
} else {
|
|
|
|
/* Incoming channel.
|
|
|
|
* Wake up socket sleeping on accept.
|
|
|
|
*/
|
|
|
|
parent->sk_data_ready(parent, 0);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Copy frame to all raw sockets on that connection */
|
|
|
|
static void l2cap_raw_recv(struct l2cap_conn *conn, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
struct l2cap_chan_list *l = &conn->chan_list;
|
|
|
|
struct sk_buff *nskb;
|
2009-04-20 06:31:08 +02:00
|
|
|
struct sock *sk;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
BT_DBG("conn %p", conn);
|
|
|
|
|
|
|
|
read_lock(&l->lock);
|
|
|
|
for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) {
|
|
|
|
if (sk->sk_type != SOCK_RAW)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
/* Don't send frame to the socket it came from */
|
|
|
|
if (skb->sk == sk)
|
|
|
|
continue;
|
2009-04-20 06:31:08 +02:00
|
|
|
nskb = skb_clone(skb, GFP_ATOMIC);
|
|
|
|
if (!nskb)
|
2005-04-17 00:20:36 +02:00
|
|
|
continue;
|
|
|
|
|
|
|
|
if (sock_queue_rcv_skb(sk, nskb))
|
|
|
|
kfree_skb(nskb);
|
|
|
|
}
|
|
|
|
read_unlock(&l->lock);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* ---- L2CAP signalling commands ---- */
|
|
|
|
static struct sk_buff *l2cap_build_cmd(struct l2cap_conn *conn,
|
|
|
|
u8 code, u8 ident, u16 dlen, void *data)
|
|
|
|
{
|
|
|
|
struct sk_buff *skb, **frag;
|
|
|
|
struct l2cap_cmd_hdr *cmd;
|
|
|
|
struct l2cap_hdr *lh;
|
|
|
|
int len, count;
|
|
|
|
|
2009-04-20 06:31:08 +02:00
|
|
|
BT_DBG("conn %p, code 0x%2.2x, ident 0x%2.2x, len %d",
|
|
|
|
conn, code, ident, dlen);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
len = L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE + dlen;
|
|
|
|
count = min_t(unsigned int, conn->mtu, len);
|
|
|
|
|
|
|
|
skb = bt_skb_alloc(count, GFP_ATOMIC);
|
|
|
|
if (!skb)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
lh = (struct l2cap_hdr *) skb_put(skb, L2CAP_HDR_SIZE);
|
2007-03-26 05:12:50 +02:00
|
|
|
lh->len = cpu_to_le16(L2CAP_CMD_HDR_SIZE + dlen);
|
2009-04-20 06:31:05 +02:00
|
|
|
lh->cid = cpu_to_le16(L2CAP_CID_SIGNALING);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
cmd = (struct l2cap_cmd_hdr *) skb_put(skb, L2CAP_CMD_HDR_SIZE);
|
|
|
|
cmd->code = code;
|
|
|
|
cmd->ident = ident;
|
2007-03-26 05:12:50 +02:00
|
|
|
cmd->len = cpu_to_le16(dlen);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
if (dlen) {
|
|
|
|
count -= L2CAP_HDR_SIZE + L2CAP_CMD_HDR_SIZE;
|
|
|
|
memcpy(skb_put(skb, count), data, count);
|
|
|
|
data += count;
|
|
|
|
}
|
|
|
|
|
|
|
|
len -= skb->len;
|
|
|
|
|
|
|
|
/* Continuation fragments (no L2CAP header) */
|
|
|
|
frag = &skb_shinfo(skb)->frag_list;
|
|
|
|
while (len) {
|
|
|
|
count = min_t(unsigned int, conn->mtu, len);
|
|
|
|
|
|
|
|
*frag = bt_skb_alloc(count, GFP_ATOMIC);
|
|
|
|
if (!*frag)
|
|
|
|
goto fail;
|
|
|
|
|
|
|
|
memcpy(skb_put(*frag, count), data, count);
|
|
|
|
|
|
|
|
len -= count;
|
|
|
|
data += count;
|
|
|
|
|
|
|
|
frag = &(*frag)->next;
|
|
|
|
}
|
|
|
|
|
|
|
|
return skb;
|
|
|
|
|
|
|
|
fail:
|
|
|
|
kfree_skb(skb);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline int l2cap_get_conf_opt(void **ptr, int *type, int *olen, unsigned long *val)
|
|
|
|
{
|
|
|
|
struct l2cap_conf_opt *opt = *ptr;
|
|
|
|
int len;
|
|
|
|
|
|
|
|
len = L2CAP_CONF_OPT_SIZE + opt->len;
|
|
|
|
*ptr += len;
|
|
|
|
|
|
|
|
*type = opt->type;
|
|
|
|
*olen = opt->len;
|
|
|
|
|
|
|
|
switch (opt->len) {
|
|
|
|
case 1:
|
|
|
|
*val = *((u8 *) opt->val);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case 2:
|
2010-10-17 00:29:47 +02:00
|
|
|
*val = get_unaligned_le16(opt->val);
|
2005-04-17 00:20:36 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
case 4:
|
2010-10-17 00:29:47 +02:00
|
|
|
*val = get_unaligned_le32(opt->val);
|
2005-04-17 00:20:36 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
*val = (unsigned long) opt->val;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
BT_DBG("type 0x%2.2x len %d val 0x%lx", *type, opt->len, *val);
|
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val)
|
|
|
|
{
|
|
|
|
struct l2cap_conf_opt *opt = *ptr;
|
|
|
|
|
|
|
|
BT_DBG("type 0x%2.2x len %d val 0x%lx", type, len, val);
|
|
|
|
|
|
|
|
opt->type = type;
|
|
|
|
opt->len = len;
|
|
|
|
|
|
|
|
switch (len) {
|
|
|
|
case 1:
|
|
|
|
*((u8 *) opt->val) = val;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case 2:
|
2010-10-18 18:25:53 +02:00
|
|
|
put_unaligned_le16(val, opt->val);
|
2005-04-17 00:20:36 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
case 4:
|
2010-10-18 18:25:53 +02:00
|
|
|
put_unaligned_le32(val, opt->val);
|
2005-04-17 00:20:36 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
memcpy(opt->val, (void *) val, len);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
*ptr += L2CAP_CONF_OPT_SIZE + len;
|
|
|
|
}
|
|
|
|
|
2010-05-01 21:15:39 +02:00
|
|
|
static void l2cap_ack_timeout(unsigned long arg)
|
|
|
|
{
|
|
|
|
struct sock *sk = (void *) arg;
|
|
|
|
|
|
|
|
bh_lock_sock(sk);
|
|
|
|
l2cap_send_ack(l2cap_pi(sk));
|
|
|
|
bh_unlock_sock(sk);
|
|
|
|
}
|
|
|
|
|
2009-10-03 07:34:36 +02:00
|
|
|
static inline void l2cap_ertm_init(struct sock *sk)
|
|
|
|
{
|
|
|
|
l2cap_pi(sk)->expected_ack_seq = 0;
|
|
|
|
l2cap_pi(sk)->unacked_frames = 0;
|
|
|
|
l2cap_pi(sk)->buffer_seq = 0;
|
2010-05-01 21:15:41 +02:00
|
|
|
l2cap_pi(sk)->num_acked = 0;
|
2010-05-01 21:15:36 +02:00
|
|
|
l2cap_pi(sk)->frames_sent = 0;
|
2009-10-03 07:34:36 +02:00
|
|
|
|
|
|
|
setup_timer(&l2cap_pi(sk)->retrans_timer,
|
|
|
|
l2cap_retrans_timeout, (unsigned long) sk);
|
|
|
|
setup_timer(&l2cap_pi(sk)->monitor_timer,
|
|
|
|
l2cap_monitor_timeout, (unsigned long) sk);
|
2010-05-01 21:15:39 +02:00
|
|
|
setup_timer(&l2cap_pi(sk)->ack_timer,
|
|
|
|
l2cap_ack_timeout, (unsigned long) sk);
|
2009-10-03 07:34:36 +02:00
|
|
|
|
|
|
|
__skb_queue_head_init(SREJ_QUEUE(sk));
|
2010-05-01 21:15:44 +02:00
|
|
|
__skb_queue_head_init(BUSY_QUEUE(sk));
|
|
|
|
|
|
|
|
INIT_WORK(&l2cap_pi(sk)->busy_work, l2cap_busy_work);
|
2010-06-21 23:53:22 +02:00
|
|
|
|
|
|
|
sk->sk_backlog_rcv = l2cap_ertm_data_rcv;
|
2009-10-03 07:34:36 +02:00
|
|
|
}
|
|
|
|
|
2009-07-04 20:06:24 +02:00
|
|
|
static inline __u8 l2cap_select_mode(__u8 mode, __u16 remote_feat_mask)
|
|
|
|
{
|
|
|
|
switch (mode) {
|
|
|
|
case L2CAP_MODE_STREAMING:
|
|
|
|
case L2CAP_MODE_ERTM:
|
|
|
|
if (l2cap_mode_supported(mode, remote_feat_mask))
|
|
|
|
return mode;
|
|
|
|
/* fall through */
|
|
|
|
default:
|
|
|
|
return L2CAP_MODE_BASIC;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
static int l2cap_build_conf_req(struct sock *sk, void *data)
|
|
|
|
{
|
|
|
|
struct l2cap_pinfo *pi = l2cap_pi(sk);
|
|
|
|
struct l2cap_conf_req *req = data;
|
2010-05-01 21:15:42 +02:00
|
|
|
struct l2cap_conf_rfc rfc = { .mode = pi->mode };
|
2005-04-17 00:20:36 +02:00
|
|
|
void *ptr = req->data;
|
|
|
|
|
|
|
|
BT_DBG("sk %p", sk);
|
|
|
|
|
2009-07-04 20:06:24 +02:00
|
|
|
if (pi->num_conf_req || pi->num_conf_rsp)
|
|
|
|
goto done;
|
|
|
|
|
|
|
|
switch (pi->mode) {
|
|
|
|
case L2CAP_MODE_STREAMING:
|
|
|
|
case L2CAP_MODE_ERTM:
|
2010-06-09 21:39:05 +02:00
|
|
|
if (pi->conf_state & L2CAP_CONF_STATE2_DEVICE)
|
2010-06-03 23:43:28 +02:00
|
|
|
break;
|
|
|
|
|
2010-06-09 21:39:05 +02:00
|
|
|
/* fall through */
|
2009-07-04 20:06:24 +02:00
|
|
|
default:
|
|
|
|
pi->mode = l2cap_select_mode(rfc.mode, pi->conn->feat_mask);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
done:
|
2011-01-24 19:01:43 +01:00
|
|
|
if (pi->imtu != L2CAP_DEFAULT_MTU)
|
|
|
|
l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu);
|
|
|
|
|
2009-05-03 08:07:53 +02:00
|
|
|
switch (pi->mode) {
|
|
|
|
case L2CAP_MODE_BASIC:
|
2010-08-04 04:49:29 +02:00
|
|
|
if (!(pi->conn->feat_mask & L2CAP_FEAT_ERTM) &&
|
|
|
|
!(pi->conn->feat_mask & L2CAP_FEAT_STREAMING))
|
|
|
|
break;
|
|
|
|
|
2010-06-09 01:05:31 +02:00
|
|
|
rfc.mode = L2CAP_MODE_BASIC;
|
|
|
|
rfc.txwin_size = 0;
|
|
|
|
rfc.max_transmit = 0;
|
|
|
|
rfc.retrans_timeout = 0;
|
|
|
|
rfc.monitor_timeout = 0;
|
|
|
|
rfc.max_pdu_size = 0;
|
|
|
|
|
2010-08-04 04:49:29 +02:00
|
|
|
l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc),
|
|
|
|
(unsigned long) &rfc);
|
2009-05-03 08:07:53 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_MODE_ERTM:
|
|
|
|
rfc.mode = L2CAP_MODE_ERTM;
|
2010-05-01 21:15:40 +02:00
|
|
|
rfc.txwin_size = pi->tx_win;
|
2010-05-01 21:15:41 +02:00
|
|
|
rfc.max_transmit = pi->max_tx;
|
2009-07-04 20:06:24 +02:00
|
|
|
rfc.retrans_timeout = 0;
|
|
|
|
rfc.monitor_timeout = 0;
|
2009-08-21 03:25:58 +02:00
|
|
|
rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE);
|
2010-05-01 21:15:36 +02:00
|
|
|
if (L2CAP_DEFAULT_MAX_PDU_SIZE > pi->conn->mtu - 10)
|
2010-05-01 21:15:40 +02:00
|
|
|
rfc.max_pdu_size = cpu_to_le16(pi->conn->mtu - 10);
|
2009-07-04 20:06:24 +02:00
|
|
|
|
2010-08-04 04:49:29 +02:00
|
|
|
l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc),
|
|
|
|
(unsigned long) &rfc);
|
|
|
|
|
2009-08-21 03:26:02 +02:00
|
|
|
if (!(pi->conn->feat_mask & L2CAP_FEAT_FCS))
|
|
|
|
break;
|
|
|
|
|
|
|
|
if (pi->fcs == L2CAP_FCS_NONE ||
|
|
|
|
pi->conf_state & L2CAP_CONF_NO_FCS_RECV) {
|
|
|
|
pi->fcs = L2CAP_FCS_NONE;
|
|
|
|
l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, pi->fcs);
|
|
|
|
}
|
2009-07-04 20:06:24 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_MODE_STREAMING:
|
|
|
|
rfc.mode = L2CAP_MODE_STREAMING;
|
|
|
|
rfc.txwin_size = 0;
|
|
|
|
rfc.max_transmit = 0;
|
|
|
|
rfc.retrans_timeout = 0;
|
|
|
|
rfc.monitor_timeout = 0;
|
2009-08-21 03:25:58 +02:00
|
|
|
rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE);
|
2010-05-01 21:15:36 +02:00
|
|
|
if (L2CAP_DEFAULT_MAX_PDU_SIZE > pi->conn->mtu - 10)
|
2010-05-01 21:15:40 +02:00
|
|
|
rfc.max_pdu_size = cpu_to_le16(pi->conn->mtu - 10);
|
2009-05-03 08:07:53 +02:00
|
|
|
|
2010-08-04 04:49:29 +02:00
|
|
|
l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc),
|
|
|
|
(unsigned long) &rfc);
|
|
|
|
|
2009-08-21 03:26:02 +02:00
|
|
|
if (!(pi->conn->feat_mask & L2CAP_FEAT_FCS))
|
|
|
|
break;
|
|
|
|
|
|
|
|
if (pi->fcs == L2CAP_FCS_NONE ||
|
|
|
|
pi->conf_state & L2CAP_CONF_NO_FCS_RECV) {
|
|
|
|
pi->fcs = L2CAP_FCS_NONE;
|
|
|
|
l2cap_add_conf_opt(&ptr, L2CAP_CONF_FCS, 1, pi->fcs);
|
|
|
|
}
|
2009-05-03 08:07:53 +02:00
|
|
|
break;
|
|
|
|
}
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
/* FIXME: Need actual value of the flush timeout */
|
|
|
|
//if (flush_to != L2CAP_DEFAULT_FLUSH_TO)
|
|
|
|
// l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, 2, pi->flush_to);
|
|
|
|
|
2007-03-26 05:12:50 +02:00
|
|
|
req->dcid = cpu_to_le16(pi->dcid);
|
|
|
|
req->flags = cpu_to_le16(0);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
return ptr - data;
|
|
|
|
}
|
|
|
|
|
2007-05-24 14:27:19 +02:00
|
|
|
static int l2cap_parse_conf_req(struct sock *sk, void *data)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
struct l2cap_pinfo *pi = l2cap_pi(sk);
|
2007-05-24 14:27:19 +02:00
|
|
|
struct l2cap_conf_rsp *rsp = data;
|
|
|
|
void *ptr = rsp->data;
|
|
|
|
void *req = pi->conf_req;
|
|
|
|
int len = pi->conf_len;
|
|
|
|
int type, hint, olen;
|
|
|
|
unsigned long val;
|
2007-10-20 13:39:51 +02:00
|
|
|
struct l2cap_conf_rfc rfc = { .mode = L2CAP_MODE_BASIC };
|
2007-10-20 13:37:06 +02:00
|
|
|
u16 mtu = L2CAP_DEFAULT_MTU;
|
2007-05-24 14:27:19 +02:00
|
|
|
u16 result = L2CAP_CONF_SUCCESS;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2007-05-24 14:27:19 +02:00
|
|
|
BT_DBG("sk %p", sk);
|
2006-11-18 22:15:00 +01:00
|
|
|
|
2007-05-24 14:27:19 +02:00
|
|
|
while (len >= L2CAP_CONF_OPT_SIZE) {
|
|
|
|
len -= l2cap_get_conf_opt(&req, &type, &olen, &val);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2009-04-20 06:31:07 +02:00
|
|
|
hint = type & L2CAP_CONF_HINT;
|
2009-05-03 03:57:55 +02:00
|
|
|
type &= L2CAP_CONF_MASK;
|
2007-05-24 14:27:19 +02:00
|
|
|
|
|
|
|
switch (type) {
|
|
|
|
case L2CAP_CONF_MTU:
|
2007-10-20 13:37:06 +02:00
|
|
|
mtu = val;
|
2007-05-24 14:27:19 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_CONF_FLUSH_TO:
|
|
|
|
pi->flush_to = val;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_CONF_QOS:
|
|
|
|
break;
|
|
|
|
|
2007-10-20 13:39:51 +02:00
|
|
|
case L2CAP_CONF_RFC:
|
|
|
|
if (olen == sizeof(rfc))
|
|
|
|
memcpy(&rfc, (void *) val, olen);
|
|
|
|
break;
|
|
|
|
|
2009-08-21 03:26:02 +02:00
|
|
|
case L2CAP_CONF_FCS:
|
|
|
|
if (val == L2CAP_FCS_NONE)
|
|
|
|
pi->conf_state |= L2CAP_CONF_NO_FCS_RECV;
|
|
|
|
|
|
|
|
break;
|
|
|
|
|
2007-05-24 14:27:19 +02:00
|
|
|
default:
|
|
|
|
if (hint)
|
|
|
|
break;
|
|
|
|
|
|
|
|
result = L2CAP_CONF_UNKNOWN;
|
|
|
|
*((u8 *) ptr++) = type;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2010-07-09 01:08:18 +02:00
|
|
|
if (pi->num_conf_rsp || pi->num_conf_req > 1)
|
2009-07-04 20:06:24 +02:00
|
|
|
goto done;
|
|
|
|
|
|
|
|
switch (pi->mode) {
|
|
|
|
case L2CAP_MODE_STREAMING:
|
|
|
|
case L2CAP_MODE_ERTM:
|
2010-06-03 23:43:28 +02:00
|
|
|
if (!(pi->conf_state & L2CAP_CONF_STATE2_DEVICE)) {
|
|
|
|
pi->mode = l2cap_select_mode(rfc.mode,
|
|
|
|
pi->conn->feat_mask);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2010-06-09 00:09:48 +02:00
|
|
|
if (pi->mode != rfc.mode)
|
2009-07-04 20:06:24 +02:00
|
|
|
return -ECONNREFUSED;
|
2010-06-09 00:09:48 +02:00
|
|
|
|
2009-07-04 20:06:24 +02:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
done:
|
|
|
|
if (pi->mode != rfc.mode) {
|
|
|
|
result = L2CAP_CONF_UNACCEPT;
|
|
|
|
rfc.mode = pi->mode;
|
|
|
|
|
|
|
|
if (pi->num_conf_rsp == 1)
|
|
|
|
return -ECONNREFUSED;
|
|
|
|
|
|
|
|
l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
|
|
|
|
sizeof(rfc), (unsigned long) &rfc);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2007-05-24 14:27:19 +02:00
|
|
|
if (result == L2CAP_CONF_SUCCESS) {
|
|
|
|
/* Configure output options and let the other side know
|
|
|
|
* which ones we don't like. */
|
|
|
|
|
2009-07-04 20:06:24 +02:00
|
|
|
if (mtu < L2CAP_DEFAULT_MIN_MTU)
|
|
|
|
result = L2CAP_CONF_UNACCEPT;
|
|
|
|
else {
|
|
|
|
pi->omtu = mtu;
|
|
|
|
pi->conf_state |= L2CAP_CONF_MTU_DONE;
|
|
|
|
}
|
|
|
|
l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->omtu);
|
2007-10-20 13:39:51 +02:00
|
|
|
|
2009-07-04 20:06:24 +02:00
|
|
|
switch (rfc.mode) {
|
|
|
|
case L2CAP_MODE_BASIC:
|
|
|
|
pi->fcs = L2CAP_FCS_NONE;
|
|
|
|
pi->conf_state |= L2CAP_CONF_MODE_DONE;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_MODE_ERTM:
|
|
|
|
pi->remote_tx_win = rfc.txwin_size;
|
|
|
|
pi->remote_max_tx = rfc.max_transmit;
|
2010-08-06 00:54:22 +02:00
|
|
|
|
|
|
|
if (le16_to_cpu(rfc.max_pdu_size) > pi->conn->mtu - 10)
|
|
|
|
rfc.max_pdu_size = cpu_to_le16(pi->conn->mtu - 10);
|
2010-05-01 21:15:40 +02:00
|
|
|
|
|
|
|
pi->remote_mps = le16_to_cpu(rfc.max_pdu_size);
|
2009-07-04 20:06:24 +02:00
|
|
|
|
2010-05-01 21:15:40 +02:00
|
|
|
rfc.retrans_timeout =
|
|
|
|
le16_to_cpu(L2CAP_DEFAULT_RETRANS_TO);
|
|
|
|
rfc.monitor_timeout =
|
|
|
|
le16_to_cpu(L2CAP_DEFAULT_MONITOR_TO);
|
2009-07-04 20:06:24 +02:00
|
|
|
|
|
|
|
pi->conf_state |= L2CAP_CONF_MODE_DONE;
|
2009-10-18 02:41:01 +02:00
|
|
|
|
|
|
|
l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
|
|
|
|
sizeof(rfc), (unsigned long) &rfc);
|
|
|
|
|
2009-07-04 20:06:24 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_MODE_STREAMING:
|
2010-08-06 00:54:22 +02:00
|
|
|
if (le16_to_cpu(rfc.max_pdu_size) > pi->conn->mtu - 10)
|
|
|
|
rfc.max_pdu_size = cpu_to_le16(pi->conn->mtu - 10);
|
2010-05-01 21:15:40 +02:00
|
|
|
|
|
|
|
pi->remote_mps = le16_to_cpu(rfc.max_pdu_size);
|
2009-07-04 20:06:24 +02:00
|
|
|
|
|
|
|
pi->conf_state |= L2CAP_CONF_MODE_DONE;
|
2009-10-18 02:41:01 +02:00
|
|
|
|
|
|
|
l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
|
|
|
|
sizeof(rfc), (unsigned long) &rfc);
|
|
|
|
|
2009-07-04 20:06:24 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
2007-05-24 14:27:19 +02:00
|
|
|
result = L2CAP_CONF_UNACCEPT;
|
|
|
|
|
2007-10-20 13:39:51 +02:00
|
|
|
memset(&rfc, 0, sizeof(rfc));
|
2009-07-04 20:06:24 +02:00
|
|
|
rfc.mode = pi->mode;
|
|
|
|
}
|
2007-10-20 13:39:51 +02:00
|
|
|
|
2009-07-04 20:06:24 +02:00
|
|
|
if (result == L2CAP_CONF_SUCCESS)
|
|
|
|
pi->conf_state |= L2CAP_CONF_OUTPUT_DONE;
|
|
|
|
}
|
2007-05-24 14:27:19 +02:00
|
|
|
rsp->scid = cpu_to_le16(pi->dcid);
|
|
|
|
rsp->result = cpu_to_le16(result);
|
|
|
|
rsp->flags = cpu_to_le16(0x0000);
|
|
|
|
|
|
|
|
return ptr - data;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
2009-07-04 20:06:24 +02:00
|
|
|
static int l2cap_parse_conf_rsp(struct sock *sk, void *rsp, int len, void *data, u16 *result)
|
|
|
|
{
|
|
|
|
struct l2cap_pinfo *pi = l2cap_pi(sk);
|
|
|
|
struct l2cap_conf_req *req = data;
|
|
|
|
void *ptr = req->data;
|
|
|
|
int type, olen;
|
|
|
|
unsigned long val;
|
|
|
|
struct l2cap_conf_rfc rfc;
|
|
|
|
|
|
|
|
BT_DBG("sk %p, rsp %p, len %d, req %p", sk, rsp, len, data);
|
|
|
|
|
|
|
|
while (len >= L2CAP_CONF_OPT_SIZE) {
|
|
|
|
len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val);
|
|
|
|
|
|
|
|
switch (type) {
|
|
|
|
case L2CAP_CONF_MTU:
|
|
|
|
if (val < L2CAP_DEFAULT_MIN_MTU) {
|
|
|
|
*result = L2CAP_CONF_UNACCEPT;
|
2010-09-01 14:17:25 +02:00
|
|
|
pi->imtu = L2CAP_DEFAULT_MIN_MTU;
|
2009-07-04 20:06:24 +02:00
|
|
|
} else
|
2010-09-01 14:17:25 +02:00
|
|
|
pi->imtu = val;
|
|
|
|
l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, pi->imtu);
|
2009-07-04 20:06:24 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_CONF_FLUSH_TO:
|
|
|
|
pi->flush_to = val;
|
|
|
|
l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO,
|
|
|
|
2, pi->flush_to);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_CONF_RFC:
|
|
|
|
if (olen == sizeof(rfc))
|
|
|
|
memcpy(&rfc, (void *)val, olen);
|
|
|
|
|
|
|
|
if ((pi->conf_state & L2CAP_CONF_STATE2_DEVICE) &&
|
|
|
|
rfc.mode != pi->mode)
|
|
|
|
return -ECONNREFUSED;
|
|
|
|
|
|
|
|
pi->fcs = 0;
|
|
|
|
|
|
|
|
l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
|
|
|
|
sizeof(rfc), (unsigned long) &rfc);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2010-06-09 01:08:49 +02:00
|
|
|
if (pi->mode == L2CAP_MODE_BASIC && pi->mode != rfc.mode)
|
|
|
|
return -ECONNREFUSED;
|
|
|
|
|
|
|
|
pi->mode = rfc.mode;
|
|
|
|
|
2009-07-04 20:06:24 +02:00
|
|
|
if (*result == L2CAP_CONF_SUCCESS) {
|
|
|
|
switch (rfc.mode) {
|
|
|
|
case L2CAP_MODE_ERTM:
|
2010-05-01 21:15:40 +02:00
|
|
|
pi->retrans_timeout = le16_to_cpu(rfc.retrans_timeout);
|
|
|
|
pi->monitor_timeout = le16_to_cpu(rfc.monitor_timeout);
|
2010-05-01 21:15:40 +02:00
|
|
|
pi->mps = le16_to_cpu(rfc.max_pdu_size);
|
2009-07-04 20:06:24 +02:00
|
|
|
break;
|
|
|
|
case L2CAP_MODE_STREAMING:
|
2010-05-01 21:15:40 +02:00
|
|
|
pi->mps = le16_to_cpu(rfc.max_pdu_size);
|
2009-07-04 20:06:24 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
req->dcid = cpu_to_le16(pi->dcid);
|
|
|
|
req->flags = cpu_to_le16(0x0000);
|
|
|
|
|
|
|
|
return ptr - data;
|
|
|
|
}
|
|
|
|
|
2007-05-24 14:27:19 +02:00
|
|
|
static int l2cap_build_conf_rsp(struct sock *sk, void *data, u16 result, u16 flags)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
struct l2cap_conf_rsp *rsp = data;
|
|
|
|
void *ptr = rsp->data;
|
|
|
|
|
2007-05-24 14:27:19 +02:00
|
|
|
BT_DBG("sk %p", sk);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2007-03-26 05:12:50 +02:00
|
|
|
rsp->scid = cpu_to_le16(l2cap_pi(sk)->dcid);
|
2007-05-24 14:27:19 +02:00
|
|
|
rsp->result = cpu_to_le16(result);
|
2007-03-26 05:12:50 +02:00
|
|
|
rsp->flags = cpu_to_le16(flags);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
return ptr - data;
|
|
|
|
}
|
|
|
|
|
2010-05-01 21:15:39 +02:00
|
|
|
static void l2cap_conf_rfc_get(struct sock *sk, void *rsp, int len)
|
|
|
|
{
|
|
|
|
struct l2cap_pinfo *pi = l2cap_pi(sk);
|
|
|
|
int type, olen;
|
|
|
|
unsigned long val;
|
|
|
|
struct l2cap_conf_rfc rfc;
|
|
|
|
|
|
|
|
BT_DBG("sk %p, rsp %p, len %d", sk, rsp, len);
|
|
|
|
|
|
|
|
if ((pi->mode != L2CAP_MODE_ERTM) && (pi->mode != L2CAP_MODE_STREAMING))
|
|
|
|
return;
|
|
|
|
|
|
|
|
while (len >= L2CAP_CONF_OPT_SIZE) {
|
|
|
|
len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val);
|
|
|
|
|
|
|
|
switch (type) {
|
|
|
|
case L2CAP_CONF_RFC:
|
|
|
|
if (olen == sizeof(rfc))
|
|
|
|
memcpy(&rfc, (void *)val, olen);
|
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
done:
|
|
|
|
switch (rfc.mode) {
|
|
|
|
case L2CAP_MODE_ERTM:
|
2010-05-01 21:15:40 +02:00
|
|
|
pi->retrans_timeout = le16_to_cpu(rfc.retrans_timeout);
|
|
|
|
pi->monitor_timeout = le16_to_cpu(rfc.monitor_timeout);
|
2010-05-01 21:15:39 +02:00
|
|
|
pi->mps = le16_to_cpu(rfc.max_pdu_size);
|
|
|
|
break;
|
|
|
|
case L2CAP_MODE_STREAMING:
|
|
|
|
pi->mps = le16_to_cpu(rfc.max_pdu_size);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2007-10-20 13:37:56 +02:00
|
|
|
static inline int l2cap_command_rej(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data)
|
|
|
|
{
|
|
|
|
struct l2cap_cmd_rej *rej = (struct l2cap_cmd_rej *) data;
|
|
|
|
|
|
|
|
if (rej->reason != 0x0000)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
if ((conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_SENT) &&
|
|
|
|
cmd->ident == conn->info_ident) {
|
|
|
|
del_timer(&conn->info_timer);
|
2009-02-06 23:35:19 +01:00
|
|
|
|
|
|
|
conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE;
|
2009-02-09 09:18:02 +01:00
|
|
|
conn->info_ident = 0;
|
2009-02-06 23:35:19 +01:00
|
|
|
|
2007-10-20 13:37:56 +02:00
|
|
|
l2cap_conn_start(conn);
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
static inline int l2cap_connect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data)
|
|
|
|
{
|
|
|
|
struct l2cap_chan_list *list = &conn->chan_list;
|
|
|
|
struct l2cap_conn_req *req = (struct l2cap_conn_req *) data;
|
|
|
|
struct l2cap_conn_rsp rsp;
|
2010-10-15 17:54:02 +02:00
|
|
|
struct sock *parent, *sk = NULL;
|
2008-09-09 07:19:20 +02:00
|
|
|
int result, status = L2CAP_CS_NO_INFO;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
u16 dcid = 0, scid = __le16_to_cpu(req->scid);
|
2008-09-09 07:19:20 +02:00
|
|
|
__le16 psm = req->psm;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
BT_DBG("psm 0x%2.2x scid 0x%4.4x", psm, scid);
|
|
|
|
|
|
|
|
/* Check if we have socket listening on psm */
|
|
|
|
parent = l2cap_get_sock_by_psm(BT_LISTEN, psm, conn->src);
|
|
|
|
if (!parent) {
|
|
|
|
result = L2CAP_CR_BAD_PSM;
|
|
|
|
goto sendresp;
|
|
|
|
}
|
|
|
|
|
2010-11-01 19:43:53 +01:00
|
|
|
bh_lock_sock(parent);
|
|
|
|
|
2008-09-09 07:19:20 +02:00
|
|
|
/* Check if the ACL is secure enough (if not SDP) */
|
|
|
|
if (psm != cpu_to_le16(0x0001) &&
|
|
|
|
!hci_conn_check_link_mode(conn->hcon)) {
|
2009-02-12 14:02:50 +01:00
|
|
|
conn->disc_reason = 0x05;
|
2008-09-09 07:19:20 +02:00
|
|
|
result = L2CAP_CR_SEC_BLOCK;
|
|
|
|
goto response;
|
|
|
|
}
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
result = L2CAP_CR_NO_MEM;
|
|
|
|
|
|
|
|
/* Check for backlog size */
|
|
|
|
if (sk_acceptq_is_full(parent)) {
|
2007-02-09 15:24:33 +01:00
|
|
|
BT_DBG("backlog full %d", parent->sk_ack_backlog);
|
2005-04-17 00:20:36 +02:00
|
|
|
goto response;
|
|
|
|
}
|
|
|
|
|
2008-03-25 18:26:21 +01:00
|
|
|
sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP, GFP_ATOMIC);
|
2005-04-17 00:20:36 +02:00
|
|
|
if (!sk)
|
|
|
|
goto response;
|
|
|
|
|
2006-07-12 23:00:07 +02:00
|
|
|
write_lock_bh(&list->lock);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
/* Check if we already have channel with that dcid */
|
|
|
|
if (__l2cap_get_chan_by_dcid(list, scid)) {
|
2006-07-12 23:00:07 +02:00
|
|
|
write_unlock_bh(&list->lock);
|
2005-04-17 00:20:36 +02:00
|
|
|
sock_set_flag(sk, SOCK_ZAPPED);
|
|
|
|
l2cap_sock_kill(sk);
|
|
|
|
goto response;
|
|
|
|
}
|
|
|
|
|
|
|
|
hci_conn_hold(conn->hcon);
|
|
|
|
|
|
|
|
l2cap_sock_init(sk, parent);
|
|
|
|
bacpy(&bt_sk(sk)->src, conn->src);
|
|
|
|
bacpy(&bt_sk(sk)->dst, conn->dst);
|
|
|
|
l2cap_pi(sk)->psm = psm;
|
|
|
|
l2cap_pi(sk)->dcid = scid;
|
|
|
|
|
|
|
|
__l2cap_chan_add(conn, sk, parent);
|
|
|
|
dcid = l2cap_pi(sk)->scid;
|
|
|
|
|
|
|
|
l2cap_sock_set_timer(sk, sk->sk_sndtimeo);
|
|
|
|
|
|
|
|
l2cap_pi(sk)->ident = cmd->ident;
|
|
|
|
|
2009-02-06 23:35:19 +01:00
|
|
|
if (conn->info_state & L2CAP_INFO_FEAT_MASK_REQ_DONE) {
|
2009-01-15 21:58:38 +01:00
|
|
|
if (l2cap_check_security(sk)) {
|
2009-01-15 21:57:00 +01:00
|
|
|
if (bt_sk(sk)->defer_setup) {
|
|
|
|
sk->sk_state = BT_CONNECT2;
|
|
|
|
result = L2CAP_CR_PEND;
|
|
|
|
status = L2CAP_CS_AUTHOR_PEND;
|
|
|
|
parent->sk_data_ready(parent, 0);
|
|
|
|
} else {
|
|
|
|
sk->sk_state = BT_CONFIG;
|
|
|
|
result = L2CAP_CR_SUCCESS;
|
|
|
|
status = L2CAP_CS_NO_INFO;
|
|
|
|
}
|
2008-07-14 20:13:44 +02:00
|
|
|
} else {
|
|
|
|
sk->sk_state = BT_CONNECT2;
|
|
|
|
result = L2CAP_CR_PEND;
|
|
|
|
status = L2CAP_CS_AUTHEN_PEND;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
sk->sk_state = BT_CONNECT2;
|
|
|
|
result = L2CAP_CR_PEND;
|
|
|
|
status = L2CAP_CS_NO_INFO;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
2006-07-12 23:00:07 +02:00
|
|
|
write_unlock_bh(&list->lock);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
response:
|
|
|
|
bh_unlock_sock(parent);
|
|
|
|
|
|
|
|
sendresp:
|
2007-03-26 05:12:50 +02:00
|
|
|
rsp.scid = cpu_to_le16(scid);
|
|
|
|
rsp.dcid = cpu_to_le16(dcid);
|
|
|
|
rsp.result = cpu_to_le16(result);
|
|
|
|
rsp.status = cpu_to_le16(status);
|
2005-04-17 00:20:36 +02:00
|
|
|
l2cap_send_cmd(conn, cmd->ident, L2CAP_CONN_RSP, sizeof(rsp), &rsp);
|
2008-07-14 20:13:44 +02:00
|
|
|
|
|
|
|
if (result == L2CAP_CR_PEND && status == L2CAP_CS_NO_INFO) {
|
|
|
|
struct l2cap_info_req info;
|
|
|
|
info.type = cpu_to_le16(L2CAP_IT_FEAT_MASK);
|
|
|
|
|
|
|
|
conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_SENT;
|
|
|
|
conn->info_ident = l2cap_get_ident(conn);
|
|
|
|
|
|
|
|
mod_timer(&conn->info_timer, jiffies +
|
|
|
|
msecs_to_jiffies(L2CAP_INFO_TIMEOUT));
|
|
|
|
|
|
|
|
l2cap_send_cmd(conn, conn->info_ident,
|
|
|
|
L2CAP_INFO_REQ, sizeof(info), &info);
|
|
|
|
}
|
|
|
|
|
2010-10-15 17:54:02 +02:00
|
|
|
if (sk && !(l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT) &&
|
2010-07-09 01:08:18 +02:00
|
|
|
result == L2CAP_CR_SUCCESS) {
|
|
|
|
u8 buf[128];
|
|
|
|
l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT;
|
|
|
|
l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
|
|
|
|
l2cap_build_conf_req(sk, buf), buf);
|
|
|
|
l2cap_pi(sk)->num_conf_req++;
|
|
|
|
}
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data)
|
|
|
|
{
|
|
|
|
struct l2cap_conn_rsp *rsp = (struct l2cap_conn_rsp *) data;
|
|
|
|
u16 scid, dcid, result, status;
|
|
|
|
struct sock *sk;
|
|
|
|
u8 req[128];
|
|
|
|
|
|
|
|
scid = __le16_to_cpu(rsp->scid);
|
|
|
|
dcid = __le16_to_cpu(rsp->dcid);
|
|
|
|
result = __le16_to_cpu(rsp->result);
|
|
|
|
status = __le16_to_cpu(rsp->status);
|
|
|
|
|
|
|
|
BT_DBG("dcid 0x%4.4x scid 0x%4.4x result 0x%2.2x status 0x%2.2x", dcid, scid, result, status);
|
|
|
|
|
|
|
|
if (scid) {
|
2009-04-20 06:31:08 +02:00
|
|
|
sk = l2cap_get_chan_by_scid(&conn->chan_list, scid);
|
|
|
|
if (!sk)
|
2010-06-22 18:56:26 +02:00
|
|
|
return -EFAULT;
|
2005-04-17 00:20:36 +02:00
|
|
|
} else {
|
2009-04-20 06:31:08 +02:00
|
|
|
sk = l2cap_get_chan_by_ident(&conn->chan_list, cmd->ident);
|
|
|
|
if (!sk)
|
2010-06-22 18:56:26 +02:00
|
|
|
return -EFAULT;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
switch (result) {
|
|
|
|
case L2CAP_CR_SUCCESS:
|
|
|
|
sk->sk_state = BT_CONFIG;
|
|
|
|
l2cap_pi(sk)->ident = 0;
|
|
|
|
l2cap_pi(sk)->dcid = dcid;
|
2009-02-06 23:56:36 +01:00
|
|
|
l2cap_pi(sk)->conf_state &= ~L2CAP_CONF_CONNECT_PEND;
|
|
|
|
|
2010-07-09 01:08:18 +02:00
|
|
|
if (l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT)
|
|
|
|
break;
|
|
|
|
|
|
|
|
l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT;
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
|
|
|
|
l2cap_build_conf_req(sk, req), req);
|
2009-07-04 20:06:24 +02:00
|
|
|
l2cap_pi(sk)->num_conf_req++;
|
2005-04-17 00:20:36 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_CR_PEND:
|
2009-02-06 23:56:36 +01:00
|
|
|
l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND;
|
2005-04-17 00:20:36 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
2010-11-03 11:32:44 +01:00
|
|
|
/* don't delete l2cap channel if sk is owned by user */
|
|
|
|
if (sock_owned_by_user(sk)) {
|
|
|
|
sk->sk_state = BT_DISCONN;
|
|
|
|
l2cap_sock_clear_timer(sk);
|
|
|
|
l2cap_sock_set_timer(sk, HZ / 5);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
l2cap_chan_del(sk, ECONNREFUSED);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
bh_unlock_sock(sk);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-08-25 00:35:42 +02:00
|
|
|
static inline void set_default_fcs(struct l2cap_pinfo *pi)
|
|
|
|
{
|
|
|
|
/* FCS is enabled only in ERTM or streaming mode, if one or both
|
|
|
|
* sides request it.
|
|
|
|
*/
|
|
|
|
if (pi->mode != L2CAP_MODE_ERTM && pi->mode != L2CAP_MODE_STREAMING)
|
|
|
|
pi->fcs = L2CAP_FCS_NONE;
|
|
|
|
else if (!(pi->conf_state & L2CAP_CONF_NO_FCS_RECV))
|
|
|
|
pi->fcs = L2CAP_FCS_CRC16;
|
|
|
|
}
|
|
|
|
|
2007-07-29 09:17:25 +02:00
|
|
|
static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
struct l2cap_conf_req *req = (struct l2cap_conf_req *) data;
|
|
|
|
u16 dcid, flags;
|
|
|
|
u8 rsp[64];
|
|
|
|
struct sock *sk;
|
2007-05-24 14:27:19 +02:00
|
|
|
int len;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
dcid = __le16_to_cpu(req->dcid);
|
|
|
|
flags = __le16_to_cpu(req->flags);
|
|
|
|
|
|
|
|
BT_DBG("dcid 0x%4.4x flags 0x%2.2x", dcid, flags);
|
|
|
|
|
2009-04-20 06:31:08 +02:00
|
|
|
sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid);
|
|
|
|
if (!sk)
|
2005-04-17 00:20:36 +02:00
|
|
|
return -ENOENT;
|
|
|
|
|
2010-06-14 07:26:15 +02:00
|
|
|
if (sk->sk_state != BT_CONFIG) {
|
|
|
|
struct l2cap_cmd_rej rej;
|
|
|
|
|
|
|
|
rej.reason = cpu_to_le16(0x0002);
|
|
|
|
l2cap_send_cmd(conn, cmd->ident, L2CAP_COMMAND_REJ,
|
|
|
|
sizeof(rej), &rej);
|
2006-11-18 22:15:20 +01:00
|
|
|
goto unlock;
|
2010-06-14 07:26:15 +02:00
|
|
|
}
|
2006-11-18 22:15:20 +01:00
|
|
|
|
2007-05-24 14:27:19 +02:00
|
|
|
/* Reject if config buffer is too small. */
|
2007-07-29 09:17:25 +02:00
|
|
|
len = cmd_len - sizeof(*req);
|
2007-05-24 14:27:19 +02:00
|
|
|
if (l2cap_pi(sk)->conf_len + len > sizeof(l2cap_pi(sk)->conf_req)) {
|
|
|
|
l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP,
|
|
|
|
l2cap_build_conf_rsp(sk, rsp,
|
|
|
|
L2CAP_CONF_REJECT, flags), rsp);
|
|
|
|
goto unlock;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Store config. */
|
|
|
|
memcpy(l2cap_pi(sk)->conf_req + l2cap_pi(sk)->conf_len, req->data, len);
|
|
|
|
l2cap_pi(sk)->conf_len += len;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
if (flags & 0x0001) {
|
|
|
|
/* Incomplete config. Send empty response. */
|
|
|
|
l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP,
|
2007-05-24 14:27:19 +02:00
|
|
|
l2cap_build_conf_rsp(sk, rsp,
|
|
|
|
L2CAP_CONF_SUCCESS, 0x0001), rsp);
|
2005-04-17 00:20:36 +02:00
|
|
|
goto unlock;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Complete config. */
|
2007-05-24 14:27:19 +02:00
|
|
|
len = l2cap_parse_conf_req(sk, rsp);
|
2009-07-04 20:06:24 +02:00
|
|
|
if (len < 0) {
|
2010-05-20 21:21:53 +02:00
|
|
|
l2cap_send_disconn_req(conn, sk, ECONNRESET);
|
2005-04-17 00:20:36 +02:00
|
|
|
goto unlock;
|
2009-07-04 20:06:24 +02:00
|
|
|
}
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2007-05-24 14:27:19 +02:00
|
|
|
l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP, len, rsp);
|
2009-07-04 20:06:24 +02:00
|
|
|
l2cap_pi(sk)->num_conf_rsp++;
|
2007-05-24 14:27:19 +02:00
|
|
|
|
|
|
|
/* Reset config buffer. */
|
|
|
|
l2cap_pi(sk)->conf_len = 0;
|
|
|
|
|
2007-10-20 13:35:42 +02:00
|
|
|
if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE))
|
|
|
|
goto unlock;
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
if (l2cap_pi(sk)->conf_state & L2CAP_CONF_INPUT_DONE) {
|
2010-08-25 00:35:42 +02:00
|
|
|
set_default_fcs(l2cap_pi(sk));
|
2009-08-21 03:26:02 +02:00
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
sk->sk_state = BT_CONNECTED;
|
2009-08-21 03:26:00 +02:00
|
|
|
|
2009-10-03 07:34:36 +02:00
|
|
|
l2cap_pi(sk)->next_tx_seq = 0;
|
|
|
|
l2cap_pi(sk)->expected_tx_seq = 0;
|
2009-08-21 03:25:57 +02:00
|
|
|
__skb_queue_head_init(TX_QUEUE(sk));
|
2009-10-03 07:34:36 +02:00
|
|
|
if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM)
|
|
|
|
l2cap_ertm_init(sk);
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
l2cap_chan_ready(sk);
|
2007-10-20 13:35:42 +02:00
|
|
|
goto unlock;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!(l2cap_pi(sk)->conf_state & L2CAP_CONF_REQ_SENT)) {
|
2008-07-14 20:13:44 +02:00
|
|
|
u8 buf[64];
|
2010-09-30 10:52:40 +02:00
|
|
|
l2cap_pi(sk)->conf_state |= L2CAP_CONF_REQ_SENT;
|
2005-04-17 00:20:36 +02:00
|
|
|
l2cap_send_cmd(conn, l2cap_get_ident(conn), L2CAP_CONF_REQ,
|
2008-07-14 20:13:44 +02:00
|
|
|
l2cap_build_conf_req(sk, buf), buf);
|
2009-07-04 20:06:24 +02:00
|
|
|
l2cap_pi(sk)->num_conf_req++;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
unlock:
|
|
|
|
bh_unlock_sock(sk);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data)
|
|
|
|
{
|
|
|
|
struct l2cap_conf_rsp *rsp = (struct l2cap_conf_rsp *)data;
|
|
|
|
u16 scid, flags, result;
|
|
|
|
struct sock *sk;
|
2010-05-01 21:15:39 +02:00
|
|
|
int len = cmd->len - sizeof(*rsp);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
scid = __le16_to_cpu(rsp->scid);
|
|
|
|
flags = __le16_to_cpu(rsp->flags);
|
|
|
|
result = __le16_to_cpu(rsp->result);
|
|
|
|
|
2009-04-20 06:31:08 +02:00
|
|
|
BT_DBG("scid 0x%4.4x flags 0x%2.2x result 0x%2.2x",
|
|
|
|
scid, flags, result);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2009-04-20 06:31:08 +02:00
|
|
|
sk = l2cap_get_chan_by_scid(&conn->chan_list, scid);
|
|
|
|
if (!sk)
|
2005-04-17 00:20:36 +02:00
|
|
|
return 0;
|
|
|
|
|
|
|
|
switch (result) {
|
|
|
|
case L2CAP_CONF_SUCCESS:
|
2010-05-01 21:15:39 +02:00
|
|
|
l2cap_conf_rfc_get(sk, rsp->data, len);
|
2005-04-17 00:20:36 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_CONF_UNACCEPT:
|
2009-07-04 20:06:24 +02:00
|
|
|
if (l2cap_pi(sk)->num_conf_rsp <= L2CAP_CONF_MAX_CONF_RSP) {
|
|
|
|
char req[64];
|
|
|
|
|
2010-03-19 09:26:28 +01:00
|
|
|
if (len > sizeof(req) - sizeof(struct l2cap_conf_req)) {
|
2010-05-20 21:21:53 +02:00
|
|
|
l2cap_send_disconn_req(conn, sk, ECONNRESET);
|
2010-03-19 09:26:28 +01:00
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
|
2009-07-04 20:06:24 +02:00
|
|
|
/* throw out any old stored conf requests */
|
|
|
|
result = L2CAP_CONF_SUCCESS;
|
|
|
|
len = l2cap_parse_conf_rsp(sk, rsp->data,
|
|
|
|
len, req, &result);
|
|
|
|
if (len < 0) {
|
2010-05-20 21:21:53 +02:00
|
|
|
l2cap_send_disconn_req(conn, sk, ECONNRESET);
|
2009-07-04 20:06:24 +02:00
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
|
|
|
|
l2cap_send_cmd(conn, l2cap_get_ident(conn),
|
|
|
|
L2CAP_CONF_REQ, len, req);
|
|
|
|
l2cap_pi(sk)->num_conf_req++;
|
|
|
|
if (result != L2CAP_CONF_SUCCESS)
|
|
|
|
goto done;
|
|
|
|
break;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
2007-02-09 15:24:33 +01:00
|
|
|
default:
|
2008-07-14 20:13:54 +02:00
|
|
|
sk->sk_err = ECONNRESET;
|
2005-04-17 00:20:36 +02:00
|
|
|
l2cap_sock_set_timer(sk, HZ * 5);
|
2010-05-20 21:21:53 +02:00
|
|
|
l2cap_send_disconn_req(conn, sk, ECONNRESET);
|
2005-04-17 00:20:36 +02:00
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (flags & 0x01)
|
|
|
|
goto done;
|
|
|
|
|
|
|
|
l2cap_pi(sk)->conf_state |= L2CAP_CONF_INPUT_DONE;
|
|
|
|
|
|
|
|
if (l2cap_pi(sk)->conf_state & L2CAP_CONF_OUTPUT_DONE) {
|
2010-08-25 00:35:42 +02:00
|
|
|
set_default_fcs(l2cap_pi(sk));
|
2009-08-21 03:26:02 +02:00
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
sk->sk_state = BT_CONNECTED;
|
2009-10-03 07:34:36 +02:00
|
|
|
l2cap_pi(sk)->next_tx_seq = 0;
|
2009-08-21 03:25:57 +02:00
|
|
|
l2cap_pi(sk)->expected_tx_seq = 0;
|
|
|
|
__skb_queue_head_init(TX_QUEUE(sk));
|
2009-10-03 07:34:36 +02:00
|
|
|
if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM)
|
|
|
|
l2cap_ertm_init(sk);
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
l2cap_chan_ready(sk);
|
|
|
|
}
|
|
|
|
|
|
|
|
done:
|
|
|
|
bh_unlock_sock(sk);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data)
|
|
|
|
{
|
|
|
|
struct l2cap_disconn_req *req = (struct l2cap_disconn_req *) data;
|
|
|
|
struct l2cap_disconn_rsp rsp;
|
|
|
|
u16 dcid, scid;
|
|
|
|
struct sock *sk;
|
|
|
|
|
|
|
|
scid = __le16_to_cpu(req->scid);
|
|
|
|
dcid = __le16_to_cpu(req->dcid);
|
|
|
|
|
|
|
|
BT_DBG("scid 0x%4.4x dcid 0x%4.4x", scid, dcid);
|
|
|
|
|
2009-04-20 06:31:08 +02:00
|
|
|
sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid);
|
|
|
|
if (!sk)
|
2005-04-17 00:20:36 +02:00
|
|
|
return 0;
|
|
|
|
|
2007-03-26 05:12:50 +02:00
|
|
|
rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid);
|
|
|
|
rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid);
|
2005-04-17 00:20:36 +02:00
|
|
|
l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp);
|
|
|
|
|
|
|
|
sk->sk_shutdown = SHUTDOWN_MASK;
|
|
|
|
|
2010-11-03 11:32:44 +01:00
|
|
|
/* don't delete l2cap channel if sk is owned by user */
|
|
|
|
if (sock_owned_by_user(sk)) {
|
|
|
|
sk->sk_state = BT_DISCONN;
|
|
|
|
l2cap_sock_clear_timer(sk);
|
|
|
|
l2cap_sock_set_timer(sk, HZ / 5);
|
|
|
|
bh_unlock_sock(sk);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
l2cap_chan_del(sk, ECONNRESET);
|
|
|
|
bh_unlock_sock(sk);
|
|
|
|
|
|
|
|
l2cap_sock_kill(sk);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data)
|
|
|
|
{
|
|
|
|
struct l2cap_disconn_rsp *rsp = (struct l2cap_disconn_rsp *) data;
|
|
|
|
u16 dcid, scid;
|
|
|
|
struct sock *sk;
|
|
|
|
|
|
|
|
scid = __le16_to_cpu(rsp->scid);
|
|
|
|
dcid = __le16_to_cpu(rsp->dcid);
|
|
|
|
|
|
|
|
BT_DBG("dcid 0x%4.4x scid 0x%4.4x", dcid, scid);
|
|
|
|
|
2009-04-20 06:31:08 +02:00
|
|
|
sk = l2cap_get_chan_by_scid(&conn->chan_list, scid);
|
|
|
|
if (!sk)
|
2005-04-17 00:20:36 +02:00
|
|
|
return 0;
|
|
|
|
|
2010-11-03 11:32:44 +01:00
|
|
|
/* don't delete l2cap channel if sk is owned by user */
|
|
|
|
if (sock_owned_by_user(sk)) {
|
|
|
|
sk->sk_state = BT_DISCONN;
|
|
|
|
l2cap_sock_clear_timer(sk);
|
|
|
|
l2cap_sock_set_timer(sk, HZ / 5);
|
|
|
|
bh_unlock_sock(sk);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
l2cap_chan_del(sk, 0);
|
|
|
|
bh_unlock_sock(sk);
|
|
|
|
|
|
|
|
l2cap_sock_kill(sk);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data)
|
|
|
|
{
|
|
|
|
struct l2cap_info_req *req = (struct l2cap_info_req *) data;
|
|
|
|
u16 type;
|
|
|
|
|
|
|
|
type = __le16_to_cpu(req->type);
|
|
|
|
|
|
|
|
BT_DBG("type 0x%4.4x", type);
|
|
|
|
|
2007-10-20 13:38:51 +02:00
|
|
|
if (type == L2CAP_IT_FEAT_MASK) {
|
|
|
|
u8 buf[8];
|
2009-05-03 04:09:01 +02:00
|
|
|
u32 feat_mask = l2cap_feat_mask;
|
2007-10-20 13:38:51 +02:00
|
|
|
struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf;
|
|
|
|
rsp->type = cpu_to_le16(L2CAP_IT_FEAT_MASK);
|
|
|
|
rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS);
|
2010-07-18 21:25:54 +02:00
|
|
|
if (!disable_ertm)
|
2009-08-21 03:26:02 +02:00
|
|
|
feat_mask |= L2CAP_FEAT_ERTM | L2CAP_FEAT_STREAMING
|
|
|
|
| L2CAP_FEAT_FCS;
|
2009-08-24 05:45:20 +02:00
|
|
|
put_unaligned_le32(feat_mask, rsp->data);
|
2007-10-20 13:38:51 +02:00
|
|
|
l2cap_send_cmd(conn, cmd->ident,
|
|
|
|
L2CAP_INFO_RSP, sizeof(buf), buf);
|
2009-02-09 09:18:02 +01:00
|
|
|
} else if (type == L2CAP_IT_FIXED_CHAN) {
|
|
|
|
u8 buf[12];
|
|
|
|
struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf;
|
|
|
|
rsp->type = cpu_to_le16(L2CAP_IT_FIXED_CHAN);
|
|
|
|
rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS);
|
|
|
|
memcpy(buf + 4, l2cap_fixed_chan, 8);
|
|
|
|
l2cap_send_cmd(conn, cmd->ident,
|
|
|
|
L2CAP_INFO_RSP, sizeof(buf), buf);
|
2007-10-20 13:38:51 +02:00
|
|
|
} else {
|
|
|
|
struct l2cap_info_rsp rsp;
|
|
|
|
rsp.type = cpu_to_le16(type);
|
|
|
|
rsp.result = cpu_to_le16(L2CAP_IR_NOTSUPP);
|
|
|
|
l2cap_send_cmd(conn, cmd->ident,
|
|
|
|
L2CAP_INFO_RSP, sizeof(rsp), &rsp);
|
|
|
|
}
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline int l2cap_information_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data)
|
|
|
|
{
|
|
|
|
struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) data;
|
|
|
|
u16 type, result;
|
|
|
|
|
|
|
|
type = __le16_to_cpu(rsp->type);
|
|
|
|
result = __le16_to_cpu(rsp->result);
|
|
|
|
|
|
|
|
BT_DBG("type 0x%4.4x result 0x%2.2x", type, result);
|
|
|
|
|
2007-10-20 13:37:56 +02:00
|
|
|
del_timer(&conn->info_timer);
|
|
|
|
|
2010-08-04 08:43:33 +02:00
|
|
|
if (result != L2CAP_IR_SUCCESS) {
|
|
|
|
conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE;
|
|
|
|
conn->info_ident = 0;
|
|
|
|
|
|
|
|
l2cap_conn_start(conn);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2009-02-06 23:35:19 +01:00
|
|
|
if (type == L2CAP_IT_FEAT_MASK) {
|
2008-05-03 01:25:46 +02:00
|
|
|
conn->feat_mask = get_unaligned_le32(rsp->data);
|
2007-10-20 13:37:56 +02:00
|
|
|
|
2009-05-03 03:57:55 +02:00
|
|
|
if (conn->feat_mask & L2CAP_FEAT_FIXED_CHAN) {
|
2009-02-09 09:18:02 +01:00
|
|
|
struct l2cap_info_req req;
|
|
|
|
req.type = cpu_to_le16(L2CAP_IT_FIXED_CHAN);
|
|
|
|
|
|
|
|
conn->info_ident = l2cap_get_ident(conn);
|
|
|
|
|
|
|
|
l2cap_send_cmd(conn, conn->info_ident,
|
|
|
|
L2CAP_INFO_REQ, sizeof(req), &req);
|
|
|
|
} else {
|
|
|
|
conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE;
|
|
|
|
conn->info_ident = 0;
|
|
|
|
|
|
|
|
l2cap_conn_start(conn);
|
|
|
|
}
|
|
|
|
} else if (type == L2CAP_IT_FIXED_CHAN) {
|
2009-02-06 23:35:19 +01:00
|
|
|
conn->info_state |= L2CAP_INFO_FEAT_MASK_REQ_DONE;
|
2009-02-09 09:18:02 +01:00
|
|
|
conn->info_ident = 0;
|
2009-02-06 23:35:19 +01:00
|
|
|
|
|
|
|
l2cap_conn_start(conn);
|
|
|
|
}
|
2007-10-20 13:37:56 +02:00
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void l2cap_sig_channel(struct l2cap_conn *conn, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
u8 *data = skb->data;
|
|
|
|
int len = skb->len;
|
|
|
|
struct l2cap_cmd_hdr cmd;
|
|
|
|
int err = 0;
|
|
|
|
|
|
|
|
l2cap_raw_recv(conn, skb);
|
|
|
|
|
|
|
|
while (len >= L2CAP_CMD_HDR_SIZE) {
|
2007-07-29 09:17:25 +02:00
|
|
|
u16 cmd_len;
|
2005-04-17 00:20:36 +02:00
|
|
|
memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE);
|
|
|
|
data += L2CAP_CMD_HDR_SIZE;
|
|
|
|
len -= L2CAP_CMD_HDR_SIZE;
|
|
|
|
|
2007-07-29 09:17:25 +02:00
|
|
|
cmd_len = le16_to_cpu(cmd.len);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2007-07-29 09:17:25 +02:00
|
|
|
BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd.code, cmd_len, cmd.ident);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2007-07-29 09:17:25 +02:00
|
|
|
if (cmd_len > len || !cmd.ident) {
|
2005-04-17 00:20:36 +02:00
|
|
|
BT_DBG("corrupted command");
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
switch (cmd.code) {
|
|
|
|
case L2CAP_COMMAND_REJ:
|
2007-10-20 13:37:56 +02:00
|
|
|
l2cap_command_rej(conn, &cmd, data);
|
2005-04-17 00:20:36 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_CONN_REQ:
|
|
|
|
err = l2cap_connect_req(conn, &cmd, data);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_CONN_RSP:
|
|
|
|
err = l2cap_connect_rsp(conn, &cmd, data);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_CONF_REQ:
|
2007-07-29 09:17:25 +02:00
|
|
|
err = l2cap_config_req(conn, &cmd, cmd_len, data);
|
2005-04-17 00:20:36 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_CONF_RSP:
|
|
|
|
err = l2cap_config_rsp(conn, &cmd, data);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_DISCONN_REQ:
|
|
|
|
err = l2cap_disconnect_req(conn, &cmd, data);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_DISCONN_RSP:
|
|
|
|
err = l2cap_disconnect_rsp(conn, &cmd, data);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_ECHO_REQ:
|
2007-07-29 09:17:25 +02:00
|
|
|
l2cap_send_cmd(conn, cmd.ident, L2CAP_ECHO_RSP, cmd_len, data);
|
2005-04-17 00:20:36 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_ECHO_RSP:
|
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_INFO_REQ:
|
|
|
|
err = l2cap_information_req(conn, &cmd, data);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_INFO_RSP:
|
|
|
|
err = l2cap_information_rsp(conn, &cmd, data);
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
BT_ERR("Unknown signaling command 0x%2.2x", cmd.code);
|
|
|
|
err = -EINVAL;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (err) {
|
|
|
|
struct l2cap_cmd_rej rej;
|
|
|
|
BT_DBG("error %d", err);
|
|
|
|
|
|
|
|
/* FIXME: Map err to a valid reason */
|
2007-03-26 05:12:50 +02:00
|
|
|
rej.reason = cpu_to_le16(0);
|
2005-04-17 00:20:36 +02:00
|
|
|
l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej);
|
|
|
|
}
|
|
|
|
|
2007-07-29 09:17:25 +02:00
|
|
|
data += cmd_len;
|
|
|
|
len -= cmd_len;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
kfree_skb(skb);
|
|
|
|
}
|
|
|
|
|
2009-08-21 03:26:02 +02:00
|
|
|
static int l2cap_check_fcs(struct l2cap_pinfo *pi, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
u16 our_fcs, rcv_fcs;
|
|
|
|
int hdr_size = L2CAP_HDR_SIZE + 2;
|
|
|
|
|
|
|
|
if (pi->fcs == L2CAP_FCS_CRC16) {
|
|
|
|
skb_trim(skb, skb->len - 2);
|
|
|
|
rcv_fcs = get_unaligned_le16(skb->data + skb->len);
|
|
|
|
our_fcs = crc16(0, skb->data - hdr_size, skb->len + hdr_size);
|
|
|
|
|
|
|
|
if (our_fcs != rcv_fcs)
|
2010-06-22 18:56:27 +02:00
|
|
|
return -EBADMSG;
|
2009-08-21 03:26:02 +02:00
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-05-01 21:15:36 +02:00
|
|
|
static inline void l2cap_send_i_or_rr_or_rnr(struct sock *sk)
|
|
|
|
{
|
|
|
|
struct l2cap_pinfo *pi = l2cap_pi(sk);
|
|
|
|
u16 control = 0;
|
|
|
|
|
|
|
|
pi->frames_sent = 0;
|
|
|
|
|
|
|
|
control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT;
|
|
|
|
|
|
|
|
if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) {
|
2010-05-10 19:54:14 +02:00
|
|
|
control |= L2CAP_SUPER_RCV_NOT_READY;
|
2010-05-01 21:15:36 +02:00
|
|
|
l2cap_send_sframe(pi, control);
|
2010-05-01 21:15:44 +02:00
|
|
|
pi->conn_state |= L2CAP_CONN_RNR_SENT;
|
2010-05-01 21:15:36 +02:00
|
|
|
}
|
|
|
|
|
2010-06-03 21:34:20 +02:00
|
|
|
if (pi->conn_state & L2CAP_CONN_REMOTE_BUSY)
|
|
|
|
l2cap_retransmit_frames(sk);
|
2010-05-01 21:15:36 +02:00
|
|
|
|
|
|
|
l2cap_ertm_send(sk);
|
|
|
|
|
|
|
|
if (!(pi->conn_state & L2CAP_CONN_LOCAL_BUSY) &&
|
|
|
|
pi->frames_sent == 0) {
|
|
|
|
control |= L2CAP_SUPER_RCV_READY;
|
|
|
|
l2cap_send_sframe(pi, control);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2010-05-01 21:15:44 +02:00
|
|
|
static int l2cap_add_to_srej_queue(struct sock *sk, struct sk_buff *skb, u8 tx_seq, u8 sar)
|
2009-08-21 03:26:03 +02:00
|
|
|
{
|
|
|
|
struct sk_buff *next_skb;
|
2010-05-31 23:35:44 +02:00
|
|
|
struct l2cap_pinfo *pi = l2cap_pi(sk);
|
|
|
|
int tx_seq_offset, next_tx_seq_offset;
|
2009-08-21 03:26:03 +02:00
|
|
|
|
|
|
|
bt_cb(skb)->tx_seq = tx_seq;
|
|
|
|
bt_cb(skb)->sar = sar;
|
|
|
|
|
|
|
|
next_skb = skb_peek(SREJ_QUEUE(sk));
|
|
|
|
if (!next_skb) {
|
|
|
|
__skb_queue_tail(SREJ_QUEUE(sk), skb);
|
2010-05-01 21:15:44 +02:00
|
|
|
return 0;
|
2009-08-21 03:26:03 +02:00
|
|
|
}
|
|
|
|
|
2010-05-31 23:35:44 +02:00
|
|
|
tx_seq_offset = (tx_seq - pi->buffer_seq) % 64;
|
|
|
|
if (tx_seq_offset < 0)
|
|
|
|
tx_seq_offset += 64;
|
|
|
|
|
2009-08-21 03:26:03 +02:00
|
|
|
do {
|
2010-05-01 21:15:44 +02:00
|
|
|
if (bt_cb(next_skb)->tx_seq == tx_seq)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2010-05-31 23:35:44 +02:00
|
|
|
next_tx_seq_offset = (bt_cb(next_skb)->tx_seq -
|
|
|
|
pi->buffer_seq) % 64;
|
|
|
|
if (next_tx_seq_offset < 0)
|
|
|
|
next_tx_seq_offset += 64;
|
|
|
|
|
|
|
|
if (next_tx_seq_offset > tx_seq_offset) {
|
2009-08-21 03:26:03 +02:00
|
|
|
__skb_queue_before(SREJ_QUEUE(sk), next_skb, skb);
|
2010-05-01 21:15:44 +02:00
|
|
|
return 0;
|
2009-08-21 03:26:03 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
if (skb_queue_is_last(SREJ_QUEUE(sk), next_skb))
|
|
|
|
break;
|
|
|
|
|
2010-05-01 21:15:43 +02:00
|
|
|
} while ((next_skb = skb_queue_next(SREJ_QUEUE(sk), next_skb)));
|
2009-08-21 03:26:03 +02:00
|
|
|
|
|
|
|
__skb_queue_tail(SREJ_QUEUE(sk), skb);
|
2010-05-01 21:15:44 +02:00
|
|
|
|
|
|
|
return 0;
|
2009-08-21 03:26:03 +02:00
|
|
|
}
|
|
|
|
|
2010-05-01 21:15:44 +02:00
|
|
|
static int l2cap_ertm_reassembly_sdu(struct sock *sk, struct sk_buff *skb, u16 control)
|
|
|
|
{
|
|
|
|
struct l2cap_pinfo *pi = l2cap_pi(sk);
|
|
|
|
struct sk_buff *_skb;
|
2010-05-01 21:15:44 +02:00
|
|
|
int err;
|
2010-05-01 21:15:44 +02:00
|
|
|
|
|
|
|
switch (control & L2CAP_CTRL_SAR) {
|
|
|
|
case L2CAP_SDU_UNSEGMENTED:
|
|
|
|
if (pi->conn_state & L2CAP_CONN_SAR_SDU)
|
|
|
|
goto drop;
|
|
|
|
|
|
|
|
err = sock_queue_rcv_skb(sk, skb);
|
|
|
|
if (!err)
|
|
|
|
return err;
|
|
|
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_SDU_START:
|
|
|
|
if (pi->conn_state & L2CAP_CONN_SAR_SDU)
|
|
|
|
goto drop;
|
|
|
|
|
|
|
|
pi->sdu_len = get_unaligned_le16(skb->data);
|
|
|
|
|
|
|
|
if (pi->sdu_len > pi->imtu)
|
|
|
|
goto disconnect;
|
|
|
|
|
|
|
|
pi->sdu = bt_skb_alloc(pi->sdu_len, GFP_ATOMIC);
|
2010-05-01 21:15:44 +02:00
|
|
|
if (!pi->sdu)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
/* pull sdu_len bytes only after alloc, because of Local Busy
|
|
|
|
* condition we have to be sure that this will be executed
|
|
|
|
* only once, i.e., when alloc does not fail */
|
|
|
|
skb_pull(skb, 2);
|
2010-05-01 21:15:44 +02:00
|
|
|
|
|
|
|
memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len);
|
|
|
|
|
|
|
|
pi->conn_state |= L2CAP_CONN_SAR_SDU;
|
|
|
|
pi->partial_sdu_len = skb->len;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_SDU_CONTINUE:
|
|
|
|
if (!(pi->conn_state & L2CAP_CONN_SAR_SDU))
|
|
|
|
goto disconnect;
|
|
|
|
|
|
|
|
if (!pi->sdu)
|
|
|
|
goto disconnect;
|
|
|
|
|
|
|
|
pi->partial_sdu_len += skb->len;
|
|
|
|
if (pi->partial_sdu_len > pi->sdu_len)
|
|
|
|
goto drop;
|
|
|
|
|
2010-05-01 21:15:45 +02:00
|
|
|
memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len);
|
|
|
|
|
2010-05-01 21:15:44 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_SDU_END:
|
|
|
|
if (!(pi->conn_state & L2CAP_CONN_SAR_SDU))
|
|
|
|
goto disconnect;
|
|
|
|
|
|
|
|
if (!pi->sdu)
|
|
|
|
goto disconnect;
|
|
|
|
|
2010-05-01 21:15:44 +02:00
|
|
|
if (!(pi->conn_state & L2CAP_CONN_SAR_RETRY)) {
|
|
|
|
pi->partial_sdu_len += skb->len;
|
2010-05-01 21:15:44 +02:00
|
|
|
|
2010-05-01 21:15:44 +02:00
|
|
|
if (pi->partial_sdu_len > pi->imtu)
|
|
|
|
goto drop;
|
2010-05-01 21:15:44 +02:00
|
|
|
|
2010-05-01 21:15:44 +02:00
|
|
|
if (pi->partial_sdu_len != pi->sdu_len)
|
|
|
|
goto drop;
|
2010-05-01 21:15:45 +02:00
|
|
|
|
|
|
|
memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len);
|
2010-05-01 21:15:44 +02:00
|
|
|
}
|
2010-05-01 21:15:44 +02:00
|
|
|
|
|
|
|
_skb = skb_clone(pi->sdu, GFP_ATOMIC);
|
2010-05-01 21:15:44 +02:00
|
|
|
if (!_skb) {
|
|
|
|
pi->conn_state |= L2CAP_CONN_SAR_RETRY;
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
2010-05-01 21:15:44 +02:00
|
|
|
err = sock_queue_rcv_skb(sk, _skb);
|
2010-05-01 21:15:44 +02:00
|
|
|
if (err < 0) {
|
2010-05-01 21:15:44 +02:00
|
|
|
kfree_skb(_skb);
|
2010-05-01 21:15:44 +02:00
|
|
|
pi->conn_state |= L2CAP_CONN_SAR_RETRY;
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
pi->conn_state &= ~L2CAP_CONN_SAR_RETRY;
|
|
|
|
pi->conn_state &= ~L2CAP_CONN_SAR_SDU;
|
2010-05-01 21:15:44 +02:00
|
|
|
|
|
|
|
kfree_skb(pi->sdu);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
kfree_skb(skb);
|
2010-05-01 21:15:44 +02:00
|
|
|
return 0;
|
2010-05-01 21:15:44 +02:00
|
|
|
|
|
|
|
drop:
|
|
|
|
kfree_skb(pi->sdu);
|
|
|
|
pi->sdu = NULL;
|
|
|
|
|
|
|
|
disconnect:
|
2010-05-20 21:21:53 +02:00
|
|
|
l2cap_send_disconn_req(pi->conn, sk, ECONNRESET);
|
2010-05-01 21:15:44 +02:00
|
|
|
kfree_skb(skb);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-06-22 00:39:50 +02:00
|
|
|
static int l2cap_try_push_rx_skb(struct sock *sk)
|
|
|
|
{
|
|
|
|
struct l2cap_pinfo *pi = l2cap_pi(sk);
|
|
|
|
struct sk_buff *skb;
|
|
|
|
u16 control;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
while ((skb = skb_dequeue(BUSY_QUEUE(sk)))) {
|
|
|
|
control = bt_cb(skb)->sar << L2CAP_CTRL_SAR_SHIFT;
|
|
|
|
err = l2cap_ertm_reassembly_sdu(sk, skb, control);
|
|
|
|
if (err < 0) {
|
|
|
|
skb_queue_head(BUSY_QUEUE(sk), skb);
|
|
|
|
return -EBUSY;
|
|
|
|
}
|
|
|
|
|
|
|
|
pi->buffer_seq = (pi->buffer_seq + 1) % 64;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!(pi->conn_state & L2CAP_CONN_RNR_SENT))
|
|
|
|
goto done;
|
|
|
|
|
|
|
|
control = pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT;
|
|
|
|
control |= L2CAP_SUPER_RCV_READY | L2CAP_CTRL_POLL;
|
|
|
|
l2cap_send_sframe(pi, control);
|
|
|
|
l2cap_pi(sk)->retry_count = 1;
|
|
|
|
|
|
|
|
del_timer(&pi->retrans_timer);
|
|
|
|
__mod_monitor_timer();
|
|
|
|
|
|
|
|
l2cap_pi(sk)->conn_state |= L2CAP_CONN_WAIT_F;
|
|
|
|
|
|
|
|
done:
|
|
|
|
pi->conn_state &= ~L2CAP_CONN_LOCAL_BUSY;
|
|
|
|
pi->conn_state &= ~L2CAP_CONN_RNR_SENT;
|
|
|
|
|
|
|
|
BT_DBG("sk %p, Exit local busy", sk);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-05-01 21:15:44 +02:00
|
|
|
static void l2cap_busy_work(struct work_struct *work)
|
|
|
|
{
|
|
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
|
|
struct l2cap_pinfo *pi =
|
|
|
|
container_of(work, struct l2cap_pinfo, busy_work);
|
|
|
|
struct sock *sk = (struct sock *)pi;
|
|
|
|
int n_tries = 0, timeo = HZ/5, err;
|
|
|
|
struct sk_buff *skb;
|
|
|
|
|
|
|
|
lock_sock(sk);
|
|
|
|
|
2010-05-10 11:33:10 +02:00
|
|
|
add_wait_queue(sk_sleep(sk), &wait);
|
2010-05-01 21:15:44 +02:00
|
|
|
while ((skb = skb_peek(BUSY_QUEUE(sk)))) {
|
|
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
|
|
|
|
|
|
if (n_tries++ > L2CAP_LOCAL_BUSY_TRIES) {
|
|
|
|
err = -EBUSY;
|
2010-05-20 21:21:53 +02:00
|
|
|
l2cap_send_disconn_req(pi->conn, sk, EBUSY);
|
2010-06-22 00:39:50 +02:00
|
|
|
break;
|
2010-05-01 21:15:44 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
if (!timeo)
|
|
|
|
timeo = HZ/5;
|
|
|
|
|
|
|
|
if (signal_pending(current)) {
|
|
|
|
err = sock_intr_errno(timeo);
|
2010-06-22 00:39:50 +02:00
|
|
|
break;
|
2010-05-01 21:15:44 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
release_sock(sk);
|
|
|
|
timeo = schedule_timeout(timeo);
|
|
|
|
lock_sock(sk);
|
|
|
|
|
|
|
|
err = sock_error(sk);
|
|
|
|
if (err)
|
2010-06-22 00:39:50 +02:00
|
|
|
break;
|
2010-05-01 21:15:44 +02:00
|
|
|
|
2010-06-22 00:39:50 +02:00
|
|
|
if (l2cap_try_push_rx_skb(sk) == 0)
|
2010-05-01 21:15:44 +02:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
set_current_state(TASK_RUNNING);
|
2010-05-10 11:33:10 +02:00
|
|
|
remove_wait_queue(sk_sleep(sk), &wait);
|
2010-05-01 21:15:44 +02:00
|
|
|
|
|
|
|
release_sock(sk);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int l2cap_push_rx_skb(struct sock *sk, struct sk_buff *skb, u16 control)
|
|
|
|
{
|
|
|
|
struct l2cap_pinfo *pi = l2cap_pi(sk);
|
|
|
|
int sctrl, err;
|
|
|
|
|
|
|
|
if (pi->conn_state & L2CAP_CONN_LOCAL_BUSY) {
|
|
|
|
bt_cb(skb)->sar = control >> L2CAP_CTRL_SAR_SHIFT;
|
|
|
|
__skb_queue_tail(BUSY_QUEUE(sk), skb);
|
2010-06-22 00:39:50 +02:00
|
|
|
return l2cap_try_push_rx_skb(sk);
|
|
|
|
|
|
|
|
|
2010-05-01 21:15:44 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
err = l2cap_ertm_reassembly_sdu(sk, skb, control);
|
|
|
|
if (err >= 0) {
|
|
|
|
pi->buffer_seq = (pi->buffer_seq + 1) % 64;
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Busy Condition */
|
2010-04-19 19:45:38 +02:00
|
|
|
BT_DBG("sk %p, Enter local busy", sk);
|
|
|
|
|
2010-05-01 21:15:44 +02:00
|
|
|
pi->conn_state |= L2CAP_CONN_LOCAL_BUSY;
|
|
|
|
bt_cb(skb)->sar = control >> L2CAP_CTRL_SAR_SHIFT;
|
|
|
|
__skb_queue_tail(BUSY_QUEUE(sk), skb);
|
|
|
|
|
|
|
|
sctrl = pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT;
|
|
|
|
sctrl |= L2CAP_SUPER_RCV_NOT_READY;
|
|
|
|
l2cap_send_sframe(pi, sctrl);
|
|
|
|
|
|
|
|
pi->conn_state |= L2CAP_CONN_RNR_SENT;
|
|
|
|
|
2010-05-12 23:32:04 +02:00
|
|
|
del_timer(&pi->ack_timer);
|
|
|
|
|
2010-05-01 21:15:44 +02:00
|
|
|
queue_work(_busy_wq, &pi->busy_work);
|
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2010-05-01 21:15:44 +02:00
|
|
|
static int l2cap_streaming_reassembly_sdu(struct sock *sk, struct sk_buff *skb, u16 control)
|
2009-08-21 03:25:58 +02:00
|
|
|
{
|
|
|
|
struct l2cap_pinfo *pi = l2cap_pi(sk);
|
|
|
|
struct sk_buff *_skb;
|
|
|
|
int err = -EINVAL;
|
|
|
|
|
2010-05-01 21:15:44 +02:00
|
|
|
/*
|
|
|
|
* TODO: We have to notify the userland if some data is lost with the
|
|
|
|
* Streaming Mode.
|
|
|
|
*/
|
|
|
|
|
2009-08-21 03:25:58 +02:00
|
|
|
switch (control & L2CAP_CTRL_SAR) {
|
|
|
|
case L2CAP_SDU_UNSEGMENTED:
|
|
|
|
if (pi->conn_state & L2CAP_CONN_SAR_SDU) {
|
|
|
|
kfree_skb(pi->sdu);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
err = sock_queue_rcv_skb(sk, skb);
|
|
|
|
if (!err)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_SDU_START:
|
|
|
|
if (pi->conn_state & L2CAP_CONN_SAR_SDU) {
|
|
|
|
kfree_skb(pi->sdu);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
pi->sdu_len = get_unaligned_le16(skb->data);
|
|
|
|
skb_pull(skb, 2);
|
|
|
|
|
2010-05-01 21:15:40 +02:00
|
|
|
if (pi->sdu_len > pi->imtu) {
|
|
|
|
err = -EMSGSIZE;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2009-08-21 03:25:58 +02:00
|
|
|
pi->sdu = bt_skb_alloc(pi->sdu_len, GFP_ATOMIC);
|
|
|
|
if (!pi->sdu) {
|
|
|
|
err = -ENOMEM;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len);
|
|
|
|
|
|
|
|
pi->conn_state |= L2CAP_CONN_SAR_SDU;
|
|
|
|
pi->partial_sdu_len = skb->len;
|
|
|
|
err = 0;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_SDU_CONTINUE:
|
|
|
|
if (!(pi->conn_state & L2CAP_CONN_SAR_SDU))
|
|
|
|
break;
|
|
|
|
|
|
|
|
memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len);
|
|
|
|
|
|
|
|
pi->partial_sdu_len += skb->len;
|
|
|
|
if (pi->partial_sdu_len > pi->sdu_len)
|
|
|
|
kfree_skb(pi->sdu);
|
|
|
|
else
|
|
|
|
err = 0;
|
|
|
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_SDU_END:
|
|
|
|
if (!(pi->conn_state & L2CAP_CONN_SAR_SDU))
|
|
|
|
break;
|
|
|
|
|
|
|
|
memcpy(skb_put(pi->sdu, skb->len), skb->data, skb->len);
|
|
|
|
|
|
|
|
pi->conn_state &= ~L2CAP_CONN_SAR_SDU;
|
|
|
|
pi->partial_sdu_len += skb->len;
|
|
|
|
|
2010-05-01 21:15:37 +02:00
|
|
|
if (pi->partial_sdu_len > pi->imtu)
|
|
|
|
goto drop;
|
|
|
|
|
2009-08-21 03:25:58 +02:00
|
|
|
if (pi->partial_sdu_len == pi->sdu_len) {
|
|
|
|
_skb = skb_clone(pi->sdu, GFP_ATOMIC);
|
|
|
|
err = sock_queue_rcv_skb(sk, _skb);
|
|
|
|
if (err < 0)
|
|
|
|
kfree_skb(_skb);
|
|
|
|
}
|
|
|
|
err = 0;
|
|
|
|
|
2010-05-01 21:15:37 +02:00
|
|
|
drop:
|
|
|
|
kfree_skb(pi->sdu);
|
2009-08-21 03:25:58 +02:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
kfree_skb(skb);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2009-08-21 03:26:03 +02:00
|
|
|
static void l2cap_check_srej_gap(struct sock *sk, u8 tx_seq)
|
|
|
|
{
|
|
|
|
struct sk_buff *skb;
|
2010-05-01 21:15:43 +02:00
|
|
|
u16 control;
|
2009-08-21 03:26:03 +02:00
|
|
|
|
2010-05-01 21:15:43 +02:00
|
|
|
while ((skb = skb_peek(SREJ_QUEUE(sk)))) {
|
2009-08-21 03:26:03 +02:00
|
|
|
if (bt_cb(skb)->tx_seq != tx_seq)
|
|
|
|
break;
|
|
|
|
|
|
|
|
skb = skb_dequeue(SREJ_QUEUE(sk));
|
2010-05-01 21:15:43 +02:00
|
|
|
control = bt_cb(skb)->sar << L2CAP_CTRL_SAR_SHIFT;
|
2010-05-01 21:15:44 +02:00
|
|
|
l2cap_ertm_reassembly_sdu(sk, skb, control);
|
2009-08-21 03:26:03 +02:00
|
|
|
l2cap_pi(sk)->buffer_seq_srej =
|
|
|
|
(l2cap_pi(sk)->buffer_seq_srej + 1) % 64;
|
2010-05-11 00:34:11 +02:00
|
|
|
tx_seq = (tx_seq + 1) % 64;
|
2009-08-21 03:26:03 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void l2cap_resend_srejframe(struct sock *sk, u8 tx_seq)
|
|
|
|
{
|
|
|
|
struct l2cap_pinfo *pi = l2cap_pi(sk);
|
|
|
|
struct srej_list *l, *tmp;
|
|
|
|
u16 control;
|
|
|
|
|
2010-05-01 21:15:43 +02:00
|
|
|
list_for_each_entry_safe(l, tmp, SREJ_LIST(sk), list) {
|
2009-08-21 03:26:03 +02:00
|
|
|
if (l->tx_seq == tx_seq) {
|
|
|
|
list_del(&l->list);
|
|
|
|
kfree(l);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
control = L2CAP_SUPER_SELECT_REJECT;
|
|
|
|
control |= l->tx_seq << L2CAP_CTRL_REQSEQ_SHIFT;
|
|
|
|
l2cap_send_sframe(pi, control);
|
|
|
|
list_del(&l->list);
|
|
|
|
list_add_tail(&l->list, SREJ_LIST(sk));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void l2cap_send_srejframe(struct sock *sk, u8 tx_seq)
|
|
|
|
{
|
|
|
|
struct l2cap_pinfo *pi = l2cap_pi(sk);
|
|
|
|
struct srej_list *new;
|
|
|
|
u16 control;
|
|
|
|
|
|
|
|
while (tx_seq != pi->expected_tx_seq) {
|
|
|
|
control = L2CAP_SUPER_SELECT_REJECT;
|
|
|
|
control |= pi->expected_tx_seq << L2CAP_CTRL_REQSEQ_SHIFT;
|
|
|
|
l2cap_send_sframe(pi, control);
|
|
|
|
|
|
|
|
new = kzalloc(sizeof(struct srej_list), GFP_ATOMIC);
|
2010-05-11 00:34:11 +02:00
|
|
|
new->tx_seq = pi->expected_tx_seq;
|
|
|
|
pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64;
|
2009-08-21 03:26:03 +02:00
|
|
|
list_add_tail(&new->list, SREJ_LIST(sk));
|
|
|
|
}
|
2010-05-11 00:34:11 +02:00
|
|
|
pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64;
|
2009-08-21 03:26:03 +02:00
|
|
|
}
|
|
|
|
|
2009-08-21 03:25:57 +02:00
|
|
|
static inline int l2cap_data_channel_iframe(struct sock *sk, u16 rx_control, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
struct l2cap_pinfo *pi = l2cap_pi(sk);
|
|
|
|
u8 tx_seq = __get_txseq(rx_control);
|
2009-10-03 07:34:38 +02:00
|
|
|
u8 req_seq = __get_reqseq(rx_control);
|
2009-08-21 03:26:03 +02:00
|
|
|
u8 sar = rx_control >> L2CAP_CTRL_SAR_SHIFT;
|
2010-05-10 23:32:04 +02:00
|
|
|
int tx_seq_offset, expected_tx_seq_offset;
|
2010-05-01 21:15:41 +02:00
|
|
|
int num_to_ack = (pi->tx_win/6) + 1;
|
2009-08-21 03:25:57 +02:00
|
|
|
int err = 0;
|
|
|
|
|
2010-04-19 19:45:38 +02:00
|
|
|
BT_DBG("sk %p len %d tx_seq %d rx_control 0x%4.4x", sk, skb->len, tx_seq,
|
|
|
|
rx_control);
|
2009-08-21 03:25:57 +02:00
|
|
|
|
2010-05-06 01:05:57 +02:00
|
|
|
if (L2CAP_CTRL_FINAL & rx_control &&
|
|
|
|
l2cap_pi(sk)->conn_state & L2CAP_CONN_WAIT_F) {
|
2010-05-01 21:15:37 +02:00
|
|
|
del_timer(&pi->monitor_timer);
|
|
|
|
if (pi->unacked_frames > 0)
|
|
|
|
__mod_retrans_timer();
|
|
|
|
pi->conn_state &= ~L2CAP_CONN_WAIT_F;
|
|
|
|
}
|
|
|
|
|
2009-10-03 07:34:38 +02:00
|
|
|
pi->expected_ack_seq = req_seq;
|
|
|
|
l2cap_drop_acked_frames(sk);
|
|
|
|
|
2009-08-21 03:26:03 +02:00
|
|
|
if (tx_seq == pi->expected_tx_seq)
|
|
|
|
goto expected;
|
2009-08-21 03:25:57 +02:00
|
|
|
|
2010-05-01 21:15:44 +02:00
|
|
|
tx_seq_offset = (tx_seq - pi->buffer_seq) % 64;
|
|
|
|
if (tx_seq_offset < 0)
|
|
|
|
tx_seq_offset += 64;
|
|
|
|
|
|
|
|
/* invalid tx_seq */
|
|
|
|
if (tx_seq_offset >= pi->tx_win) {
|
2010-05-20 21:21:53 +02:00
|
|
|
l2cap_send_disconn_req(pi->conn, sk, ECONNRESET);
|
2010-05-01 21:15:44 +02:00
|
|
|
goto drop;
|
|
|
|
}
|
|
|
|
|
2010-05-01 21:15:44 +02:00
|
|
|
if (pi->conn_state == L2CAP_CONN_LOCAL_BUSY)
|
|
|
|
goto drop;
|
|
|
|
|
2009-08-21 03:26:03 +02:00
|
|
|
if (pi->conn_state & L2CAP_CONN_SREJ_SENT) {
|
|
|
|
struct srej_list *first;
|
2009-08-21 03:25:59 +02:00
|
|
|
|
2009-08-21 03:26:03 +02:00
|
|
|
first = list_first_entry(SREJ_LIST(sk),
|
|
|
|
struct srej_list, list);
|
|
|
|
if (tx_seq == first->tx_seq) {
|
|
|
|
l2cap_add_to_srej_queue(sk, skb, tx_seq, sar);
|
|
|
|
l2cap_check_srej_gap(sk, tx_seq);
|
|
|
|
|
|
|
|
list_del(&first->list);
|
|
|
|
kfree(first);
|
|
|
|
|
|
|
|
if (list_empty(SREJ_LIST(sk))) {
|
|
|
|
pi->buffer_seq = pi->buffer_seq_srej;
|
|
|
|
pi->conn_state &= ~L2CAP_CONN_SREJ_SENT;
|
2010-05-01 21:15:40 +02:00
|
|
|
l2cap_send_ack(pi);
|
2010-04-19 19:45:38 +02:00
|
|
|
BT_DBG("sk %p, Exit SREJ_SENT", sk);
|
2009-08-21 03:26:03 +02:00
|
|
|
}
|
|
|
|
} else {
|
|
|
|
struct srej_list *l;
|
2010-05-01 21:15:44 +02:00
|
|
|
|
|
|
|
/* duplicated tx_seq */
|
|
|
|
if (l2cap_add_to_srej_queue(sk, skb, tx_seq, sar) < 0)
|
|
|
|
goto drop;
|
2009-08-21 03:26:03 +02:00
|
|
|
|
|
|
|
list_for_each_entry(l, SREJ_LIST(sk), list) {
|
|
|
|
if (l->tx_seq == tx_seq) {
|
|
|
|
l2cap_resend_srejframe(sk, tx_seq);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
l2cap_send_srejframe(sk, tx_seq);
|
2009-08-21 03:25:59 +02:00
|
|
|
}
|
|
|
|
} else {
|
2010-05-01 21:15:44 +02:00
|
|
|
expected_tx_seq_offset =
|
|
|
|
(pi->expected_tx_seq - pi->buffer_seq) % 64;
|
|
|
|
if (expected_tx_seq_offset < 0)
|
|
|
|
expected_tx_seq_offset += 64;
|
|
|
|
|
|
|
|
/* duplicated tx_seq */
|
|
|
|
if (tx_seq_offset < expected_tx_seq_offset)
|
|
|
|
goto drop;
|
|
|
|
|
2009-08-21 03:26:03 +02:00
|
|
|
pi->conn_state |= L2CAP_CONN_SREJ_SENT;
|
2009-08-21 03:25:57 +02:00
|
|
|
|
2010-04-19 19:45:38 +02:00
|
|
|
BT_DBG("sk %p, Enter SREJ", sk);
|
|
|
|
|
2009-08-21 03:26:03 +02:00
|
|
|
INIT_LIST_HEAD(SREJ_LIST(sk));
|
|
|
|
pi->buffer_seq_srej = pi->buffer_seq;
|
|
|
|
|
|
|
|
__skb_queue_head_init(SREJ_QUEUE(sk));
|
2010-05-01 21:15:44 +02:00
|
|
|
__skb_queue_head_init(BUSY_QUEUE(sk));
|
2009-08-21 03:26:03 +02:00
|
|
|
l2cap_add_to_srej_queue(sk, skb, tx_seq, sar);
|
|
|
|
|
2009-08-21 03:26:04 +02:00
|
|
|
pi->conn_state |= L2CAP_CONN_SEND_PBIT;
|
|
|
|
|
2009-08-21 03:26:03 +02:00
|
|
|
l2cap_send_srejframe(sk, tx_seq);
|
2010-05-12 23:32:04 +02:00
|
|
|
|
|
|
|
del_timer(&pi->ack_timer);
|
2009-08-21 03:25:57 +02:00
|
|
|
}
|
2009-08-21 03:25:59 +02:00
|
|
|
return 0;
|
|
|
|
|
2009-08-21 03:26:03 +02:00
|
|
|
expected:
|
|
|
|
pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64;
|
|
|
|
|
|
|
|
if (pi->conn_state & L2CAP_CONN_SREJ_SENT) {
|
2010-05-01 21:15:42 +02:00
|
|
|
bt_cb(skb)->tx_seq = tx_seq;
|
|
|
|
bt_cb(skb)->sar = sar;
|
|
|
|
__skb_queue_tail(SREJ_QUEUE(sk), skb);
|
2009-08-21 03:26:03 +02:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-06-16 22:21:44 +02:00
|
|
|
err = l2cap_push_rx_skb(sk, skb, rx_control);
|
|
|
|
if (err < 0)
|
|
|
|
return 0;
|
|
|
|
|
2009-10-03 07:34:39 +02:00
|
|
|
if (rx_control & L2CAP_CTRL_FINAL) {
|
|
|
|
if (pi->conn_state & L2CAP_CONN_REJ_ACT)
|
|
|
|
pi->conn_state &= ~L2CAP_CONN_REJ_ACT;
|
2010-05-01 21:15:45 +02:00
|
|
|
else
|
|
|
|
l2cap_retransmit_frames(sk);
|
2009-10-03 07:34:39 +02:00
|
|
|
}
|
|
|
|
|
2010-05-01 21:15:39 +02:00
|
|
|
__mod_ack_timer();
|
|
|
|
|
2010-05-01 21:15:41 +02:00
|
|
|
pi->num_acked = (pi->num_acked + 1) % num_to_ack;
|
|
|
|
if (pi->num_acked == num_to_ack - 1)
|
2010-05-01 21:15:37 +02:00
|
|
|
l2cap_send_ack(pi);
|
|
|
|
|
2009-08-21 03:26:03 +02:00
|
|
|
return 0;
|
2010-05-01 21:15:44 +02:00
|
|
|
|
|
|
|
drop:
|
|
|
|
kfree_skb(skb);
|
|
|
|
return 0;
|
2009-08-21 03:25:57 +02:00
|
|
|
}
|
|
|
|
|
2010-05-01 21:15:38 +02:00
|
|
|
static inline void l2cap_data_channel_rrframe(struct sock *sk, u16 rx_control)
|
2009-08-21 03:25:57 +02:00
|
|
|
{
|
|
|
|
struct l2cap_pinfo *pi = l2cap_pi(sk);
|
2010-05-01 21:15:38 +02:00
|
|
|
|
2010-04-19 19:45:38 +02:00
|
|
|
BT_DBG("sk %p, req_seq %d ctrl 0x%4.4x", sk, __get_reqseq(rx_control),
|
|
|
|
rx_control);
|
|
|
|
|
2010-05-01 21:15:38 +02:00
|
|
|
pi->expected_ack_seq = __get_reqseq(rx_control);
|
|
|
|
l2cap_drop_acked_frames(sk);
|
2009-08-21 03:25:57 +02:00
|
|
|
|
2010-05-01 21:15:38 +02:00
|
|
|
if (rx_control & L2CAP_CTRL_POLL) {
|
2010-05-29 07:24:35 +02:00
|
|
|
pi->conn_state |= L2CAP_CONN_SEND_FBIT;
|
2010-05-01 21:15:39 +02:00
|
|
|
if (pi->conn_state & L2CAP_CONN_SREJ_SENT) {
|
|
|
|
if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY) &&
|
|
|
|
(pi->unacked_frames > 0))
|
|
|
|
__mod_retrans_timer();
|
|
|
|
|
|
|
|
pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY;
|
|
|
|
l2cap_send_srejtail(sk);
|
|
|
|
} else {
|
|
|
|
l2cap_send_i_or_rr_or_rnr(sk);
|
|
|
|
}
|
2010-05-01 21:15:37 +02:00
|
|
|
|
2010-05-01 21:15:38 +02:00
|
|
|
} else if (rx_control & L2CAP_CTRL_FINAL) {
|
|
|
|
pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY;
|
2009-10-03 07:34:39 +02:00
|
|
|
|
2010-05-01 21:15:38 +02:00
|
|
|
if (pi->conn_state & L2CAP_CONN_REJ_ACT)
|
|
|
|
pi->conn_state &= ~L2CAP_CONN_REJ_ACT;
|
2010-05-01 21:15:45 +02:00
|
|
|
else
|
|
|
|
l2cap_retransmit_frames(sk);
|
2009-08-26 09:04:02 +02:00
|
|
|
|
2010-05-01 21:15:38 +02:00
|
|
|
} else {
|
|
|
|
if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY) &&
|
|
|
|
(pi->unacked_frames > 0))
|
|
|
|
__mod_retrans_timer();
|
2009-08-21 03:25:57 +02:00
|
|
|
|
2009-08-26 09:04:02 +02:00
|
|
|
pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY;
|
2010-12-01 15:58:24 +01:00
|
|
|
if (pi->conn_state & L2CAP_CONN_SREJ_SENT)
|
2010-05-01 21:15:38 +02:00
|
|
|
l2cap_send_ack(pi);
|
2010-12-01 15:58:24 +01:00
|
|
|
else
|
2010-05-01 21:15:38 +02:00
|
|
|
l2cap_ertm_send(sk);
|
|
|
|
}
|
|
|
|
}
|
2009-08-26 09:04:02 +02:00
|
|
|
|
2010-05-01 21:15:38 +02:00
|
|
|
static inline void l2cap_data_channel_rejframe(struct sock *sk, u16 rx_control)
|
|
|
|
{
|
|
|
|
struct l2cap_pinfo *pi = l2cap_pi(sk);
|
|
|
|
u8 tx_seq = __get_reqseq(rx_control);
|
2009-08-21 03:25:59 +02:00
|
|
|
|
2010-04-19 19:45:38 +02:00
|
|
|
BT_DBG("sk %p, req_seq %d ctrl 0x%4.4x", sk, tx_seq, rx_control);
|
|
|
|
|
2010-05-01 21:15:38 +02:00
|
|
|
pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY;
|
|
|
|
|
2010-05-01 21:15:38 +02:00
|
|
|
pi->expected_ack_seq = tx_seq;
|
2010-05-01 21:15:38 +02:00
|
|
|
l2cap_drop_acked_frames(sk);
|
|
|
|
|
|
|
|
if (rx_control & L2CAP_CTRL_FINAL) {
|
|
|
|
if (pi->conn_state & L2CAP_CONN_REJ_ACT)
|
|
|
|
pi->conn_state &= ~L2CAP_CONN_REJ_ACT;
|
2010-05-01 21:15:45 +02:00
|
|
|
else
|
|
|
|
l2cap_retransmit_frames(sk);
|
2010-05-01 21:15:38 +02:00
|
|
|
} else {
|
2010-05-01 21:15:45 +02:00
|
|
|
l2cap_retransmit_frames(sk);
|
2009-08-21 03:25:59 +02:00
|
|
|
|
2010-05-06 01:56:43 +02:00
|
|
|
if (pi->conn_state & L2CAP_CONN_WAIT_F)
|
2010-05-01 21:15:38 +02:00
|
|
|
pi->conn_state |= L2CAP_CONN_REJ_ACT;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
static inline void l2cap_data_channel_srejframe(struct sock *sk, u16 rx_control)
|
|
|
|
{
|
|
|
|
struct l2cap_pinfo *pi = l2cap_pi(sk);
|
|
|
|
u8 tx_seq = __get_reqseq(rx_control);
|
2009-08-21 03:25:59 +02:00
|
|
|
|
2010-04-19 19:45:38 +02:00
|
|
|
BT_DBG("sk %p, req_seq %d ctrl 0x%4.4x", sk, tx_seq, rx_control);
|
|
|
|
|
2010-05-01 21:15:38 +02:00
|
|
|
pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY;
|
2009-08-26 09:04:02 +02:00
|
|
|
|
2010-05-01 21:15:38 +02:00
|
|
|
if (rx_control & L2CAP_CTRL_POLL) {
|
|
|
|
pi->expected_ack_seq = tx_seq;
|
|
|
|
l2cap_drop_acked_frames(sk);
|
2010-05-29 07:24:35 +02:00
|
|
|
|
|
|
|
pi->conn_state |= L2CAP_CONN_SEND_FBIT;
|
2010-05-01 21:15:45 +02:00
|
|
|
l2cap_retransmit_one_frame(sk, tx_seq);
|
|
|
|
|
2010-05-01 21:15:38 +02:00
|
|
|
l2cap_ertm_send(sk);
|
2010-05-01 21:15:45 +02:00
|
|
|
|
2010-05-01 21:15:38 +02:00
|
|
|
if (pi->conn_state & L2CAP_CONN_WAIT_F) {
|
|
|
|
pi->srej_save_reqseq = tx_seq;
|
|
|
|
pi->conn_state |= L2CAP_CONN_SREJ_ACT;
|
2009-08-21 03:26:04 +02:00
|
|
|
}
|
2010-05-01 21:15:38 +02:00
|
|
|
} else if (rx_control & L2CAP_CTRL_FINAL) {
|
|
|
|
if ((pi->conn_state & L2CAP_CONN_SREJ_ACT) &&
|
|
|
|
pi->srej_save_reqseq == tx_seq)
|
|
|
|
pi->conn_state &= ~L2CAP_CONN_SREJ_ACT;
|
|
|
|
else
|
2010-05-01 21:15:45 +02:00
|
|
|
l2cap_retransmit_one_frame(sk, tx_seq);
|
2010-05-01 21:15:38 +02:00
|
|
|
} else {
|
2010-05-01 21:15:45 +02:00
|
|
|
l2cap_retransmit_one_frame(sk, tx_seq);
|
2010-05-01 21:15:38 +02:00
|
|
|
if (pi->conn_state & L2CAP_CONN_WAIT_F) {
|
|
|
|
pi->srej_save_reqseq = tx_seq;
|
|
|
|
pi->conn_state |= L2CAP_CONN_SREJ_ACT;
|
2009-08-21 03:26:04 +02:00
|
|
|
}
|
2010-05-01 21:15:38 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void l2cap_data_channel_rnrframe(struct sock *sk, u16 rx_control)
|
|
|
|
{
|
|
|
|
struct l2cap_pinfo *pi = l2cap_pi(sk);
|
|
|
|
u8 tx_seq = __get_reqseq(rx_control);
|
|
|
|
|
2010-04-19 19:45:38 +02:00
|
|
|
BT_DBG("sk %p, req_seq %d ctrl 0x%4.4x", sk, tx_seq, rx_control);
|
|
|
|
|
2010-05-01 21:15:38 +02:00
|
|
|
pi->conn_state |= L2CAP_CONN_REMOTE_BUSY;
|
|
|
|
pi->expected_ack_seq = tx_seq;
|
|
|
|
l2cap_drop_acked_frames(sk);
|
|
|
|
|
2010-05-29 07:24:35 +02:00
|
|
|
if (rx_control & L2CAP_CTRL_POLL)
|
|
|
|
pi->conn_state |= L2CAP_CONN_SEND_FBIT;
|
|
|
|
|
2010-05-01 21:15:38 +02:00
|
|
|
if (!(pi->conn_state & L2CAP_CONN_SREJ_SENT)) {
|
|
|
|
del_timer(&pi->retrans_timer);
|
2010-05-06 00:58:27 +02:00
|
|
|
if (rx_control & L2CAP_CTRL_POLL)
|
|
|
|
l2cap_send_rr_or_rnr(pi, L2CAP_CTRL_FINAL);
|
2010-05-01 21:15:38 +02:00
|
|
|
return;
|
2010-05-01 21:15:38 +02:00
|
|
|
}
|
2010-05-01 21:15:38 +02:00
|
|
|
|
|
|
|
if (rx_control & L2CAP_CTRL_POLL)
|
|
|
|
l2cap_send_srejtail(sk);
|
|
|
|
else
|
|
|
|
l2cap_send_sframe(pi, L2CAP_SUPER_RCV_READY);
|
2010-05-01 21:15:38 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
static inline int l2cap_data_channel_sframe(struct sock *sk, u16 rx_control, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
BT_DBG("sk %p rx_control 0x%4.4x len %d", sk, rx_control, skb->len);
|
|
|
|
|
2010-05-06 01:05:57 +02:00
|
|
|
if (L2CAP_CTRL_FINAL & rx_control &&
|
|
|
|
l2cap_pi(sk)->conn_state & L2CAP_CONN_WAIT_F) {
|
2010-05-01 21:15:38 +02:00
|
|
|
del_timer(&l2cap_pi(sk)->monitor_timer);
|
|
|
|
if (l2cap_pi(sk)->unacked_frames > 0)
|
|
|
|
__mod_retrans_timer();
|
|
|
|
l2cap_pi(sk)->conn_state &= ~L2CAP_CONN_WAIT_F;
|
|
|
|
}
|
|
|
|
|
|
|
|
switch (rx_control & L2CAP_CTRL_SUPERVISE) {
|
|
|
|
case L2CAP_SUPER_RCV_READY:
|
|
|
|
l2cap_data_channel_rrframe(sk, rx_control);
|
2009-08-21 03:26:03 +02:00
|
|
|
break;
|
|
|
|
|
2010-05-01 21:15:38 +02:00
|
|
|
case L2CAP_SUPER_REJECT:
|
|
|
|
l2cap_data_channel_rejframe(sk, rx_control);
|
|
|
|
break;
|
2009-08-26 09:04:02 +02:00
|
|
|
|
2010-05-01 21:15:38 +02:00
|
|
|
case L2CAP_SUPER_SELECT_REJECT:
|
|
|
|
l2cap_data_channel_srejframe(sk, rx_control);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_SUPER_RCV_NOT_READY:
|
|
|
|
l2cap_data_channel_rnrframe(sk, rx_control);
|
2009-08-21 03:25:57 +02:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2010-05-01 21:15:35 +02:00
|
|
|
kfree_skb(skb);
|
2009-08-21 03:25:57 +02:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-06-21 23:53:22 +02:00
|
|
|
static int l2cap_ertm_data_rcv(struct sock *sk, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
struct l2cap_pinfo *pi = l2cap_pi(sk);
|
|
|
|
u16 control;
|
|
|
|
u8 req_seq;
|
|
|
|
int len, next_tx_seq_offset, req_seq_offset;
|
|
|
|
|
|
|
|
control = get_unaligned_le16(skb->data);
|
|
|
|
skb_pull(skb, 2);
|
|
|
|
len = skb->len;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* We can just drop the corrupted I-frame here.
|
|
|
|
* Receiver will miss it and start proper recovery
|
|
|
|
* procedures and ask retransmission.
|
|
|
|
*/
|
|
|
|
if (l2cap_check_fcs(pi, skb))
|
|
|
|
goto drop;
|
|
|
|
|
|
|
|
if (__is_sar_start(control) && __is_iframe(control))
|
|
|
|
len -= 2;
|
|
|
|
|
|
|
|
if (pi->fcs == L2CAP_FCS_CRC16)
|
|
|
|
len -= 2;
|
|
|
|
|
|
|
|
if (len > pi->mps) {
|
|
|
|
l2cap_send_disconn_req(pi->conn, sk, ECONNRESET);
|
|
|
|
goto drop;
|
|
|
|
}
|
|
|
|
|
|
|
|
req_seq = __get_reqseq(control);
|
|
|
|
req_seq_offset = (req_seq - pi->expected_ack_seq) % 64;
|
|
|
|
if (req_seq_offset < 0)
|
|
|
|
req_seq_offset += 64;
|
|
|
|
|
|
|
|
next_tx_seq_offset =
|
|
|
|
(pi->next_tx_seq - pi->expected_ack_seq) % 64;
|
|
|
|
if (next_tx_seq_offset < 0)
|
|
|
|
next_tx_seq_offset += 64;
|
|
|
|
|
|
|
|
/* check for invalid req-seq */
|
|
|
|
if (req_seq_offset > next_tx_seq_offset) {
|
|
|
|
l2cap_send_disconn_req(pi->conn, sk, ECONNRESET);
|
|
|
|
goto drop;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (__is_iframe(control)) {
|
|
|
|
if (len < 0) {
|
|
|
|
l2cap_send_disconn_req(pi->conn, sk, ECONNRESET);
|
|
|
|
goto drop;
|
|
|
|
}
|
|
|
|
|
|
|
|
l2cap_data_channel_iframe(sk, control, skb);
|
|
|
|
} else {
|
|
|
|
if (len != 0) {
|
|
|
|
BT_ERR("%d", len);
|
|
|
|
l2cap_send_disconn_req(pi->conn, sk, ECONNRESET);
|
|
|
|
goto drop;
|
|
|
|
}
|
|
|
|
|
|
|
|
l2cap_data_channel_sframe(sk, control, skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
drop:
|
|
|
|
kfree_skb(skb);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
struct sock *sk;
|
2009-08-21 03:26:01 +02:00
|
|
|
struct l2cap_pinfo *pi;
|
2010-06-09 21:46:25 +02:00
|
|
|
u16 control;
|
2010-06-21 23:53:22 +02:00
|
|
|
u8 tx_seq;
|
|
|
|
int len;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
sk = l2cap_get_chan_by_scid(&conn->chan_list, cid);
|
|
|
|
if (!sk) {
|
|
|
|
BT_DBG("unknown cid 0x%4.4x", cid);
|
|
|
|
goto drop;
|
|
|
|
}
|
|
|
|
|
2009-08-21 03:26:01 +02:00
|
|
|
pi = l2cap_pi(sk);
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
BT_DBG("sk %p, len %d", sk, skb->len);
|
|
|
|
|
|
|
|
if (sk->sk_state != BT_CONNECTED)
|
|
|
|
goto drop;
|
|
|
|
|
2009-08-21 03:26:01 +02:00
|
|
|
switch (pi->mode) {
|
2009-08-21 03:25:57 +02:00
|
|
|
case L2CAP_MODE_BASIC:
|
|
|
|
/* If socket recv buffers overflows we drop data here
|
|
|
|
* which is *bad* because L2CAP has to be reliable.
|
|
|
|
* But we don't have any other choice. L2CAP doesn't
|
|
|
|
* provide flow control mechanism. */
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2009-08-21 03:26:01 +02:00
|
|
|
if (pi->imtu < skb->len)
|
2009-08-21 03:25:57 +02:00
|
|
|
goto drop;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2009-08-21 03:25:57 +02:00
|
|
|
if (!sock_queue_rcv_skb(sk, skb))
|
|
|
|
goto done;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case L2CAP_MODE_ERTM:
|
2010-06-21 23:53:22 +02:00
|
|
|
if (!sock_owned_by_user(sk)) {
|
|
|
|
l2cap_ertm_data_rcv(sk, skb);
|
2010-05-01 21:15:37 +02:00
|
|
|
} else {
|
2010-06-21 23:53:22 +02:00
|
|
|
if (sk_add_backlog(sk, skb))
|
2010-05-01 21:15:37 +02:00
|
|
|
goto drop;
|
|
|
|
}
|
2009-08-21 03:25:57 +02:00
|
|
|
|
2009-12-22 14:58:08 +01:00
|
|
|
goto done;
|
2009-08-21 03:25:57 +02:00
|
|
|
|
2009-08-21 03:26:01 +02:00
|
|
|
case L2CAP_MODE_STREAMING:
|
|
|
|
control = get_unaligned_le16(skb->data);
|
|
|
|
skb_pull(skb, 2);
|
|
|
|
len = skb->len;
|
|
|
|
|
2010-05-12 03:02:00 +02:00
|
|
|
if (l2cap_check_fcs(pi, skb))
|
|
|
|
goto drop;
|
|
|
|
|
2009-08-21 03:26:01 +02:00
|
|
|
if (__is_sar_start(control))
|
|
|
|
len -= 2;
|
|
|
|
|
2009-08-21 03:26:02 +02:00
|
|
|
if (pi->fcs == L2CAP_FCS_CRC16)
|
|
|
|
len -= 2;
|
|
|
|
|
2010-06-09 21:46:25 +02:00
|
|
|
if (len > pi->mps || len < 0 || __is_sframe(control))
|
2009-08-21 03:26:01 +02:00
|
|
|
goto drop;
|
|
|
|
|
|
|
|
tx_seq = __get_txseq(control);
|
|
|
|
|
|
|
|
if (pi->expected_tx_seq == tx_seq)
|
|
|
|
pi->expected_tx_seq = (pi->expected_tx_seq + 1) % 64;
|
|
|
|
else
|
2010-05-01 21:15:36 +02:00
|
|
|
pi->expected_tx_seq = (tx_seq + 1) % 64;
|
2009-08-21 03:26:01 +02:00
|
|
|
|
2010-05-01 21:15:44 +02:00
|
|
|
l2cap_streaming_reassembly_sdu(sk, skb, control);
|
2009-08-21 03:26:01 +02:00
|
|
|
|
|
|
|
goto done;
|
|
|
|
|
2009-08-21 03:25:57 +02:00
|
|
|
default:
|
2010-05-01 21:15:36 +02:00
|
|
|
BT_DBG("sk %p: bad mode 0x%2.2x", sk, pi->mode);
|
2009-08-21 03:25:57 +02:00
|
|
|
break;
|
|
|
|
}
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
drop:
|
|
|
|
kfree_skb(skb);
|
|
|
|
|
|
|
|
done:
|
2006-07-03 10:02:46 +02:00
|
|
|
if (sk)
|
|
|
|
bh_unlock_sock(sk);
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2007-07-29 09:16:36 +02:00
|
|
|
static inline int l2cap_conless_channel(struct l2cap_conn *conn, __le16 psm, struct sk_buff *skb)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
struct sock *sk;
|
|
|
|
|
|
|
|
sk = l2cap_get_sock_by_psm(0, psm, conn->src);
|
|
|
|
if (!sk)
|
|
|
|
goto drop;
|
|
|
|
|
2010-11-01 19:43:53 +01:00
|
|
|
bh_lock_sock(sk);
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
BT_DBG("sk %p, len %d", sk, skb->len);
|
|
|
|
|
|
|
|
if (sk->sk_state != BT_BOUND && sk->sk_state != BT_CONNECTED)
|
|
|
|
goto drop;
|
|
|
|
|
|
|
|
if (l2cap_pi(sk)->imtu < skb->len)
|
|
|
|
goto drop;
|
|
|
|
|
|
|
|
if (!sock_queue_rcv_skb(sk, skb))
|
|
|
|
goto done;
|
|
|
|
|
|
|
|
drop:
|
|
|
|
kfree_skb(skb);
|
|
|
|
|
|
|
|
done:
|
2009-04-20 06:31:08 +02:00
|
|
|
if (sk)
|
|
|
|
bh_unlock_sock(sk);
|
2005-04-17 00:20:36 +02:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void l2cap_recv_frame(struct l2cap_conn *conn, struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
struct l2cap_hdr *lh = (void *) skb->data;
|
2007-07-29 09:16:36 +02:00
|
|
|
u16 cid, len;
|
|
|
|
__le16 psm;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
skb_pull(skb, L2CAP_HDR_SIZE);
|
|
|
|
cid = __le16_to_cpu(lh->cid);
|
|
|
|
len = __le16_to_cpu(lh->len);
|
|
|
|
|
2009-08-21 03:25:57 +02:00
|
|
|
if (len != skb->len) {
|
|
|
|
kfree_skb(skb);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
BT_DBG("len %d, cid 0x%4.4x", len, cid);
|
|
|
|
|
|
|
|
switch (cid) {
|
2009-04-20 06:31:05 +02:00
|
|
|
case L2CAP_CID_SIGNALING:
|
2005-04-17 00:20:36 +02:00
|
|
|
l2cap_sig_channel(conn, skb);
|
|
|
|
break;
|
|
|
|
|
2009-04-20 06:31:05 +02:00
|
|
|
case L2CAP_CID_CONN_LESS:
|
2009-08-24 05:45:20 +02:00
|
|
|
psm = get_unaligned_le16(skb->data);
|
2005-04-17 00:20:36 +02:00
|
|
|
skb_pull(skb, 2);
|
|
|
|
l2cap_conless_channel(conn, psm, skb);
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
l2cap_data_channel(conn, cid, skb);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* ---- L2CAP interface with lower layer (HCI) ---- */
|
|
|
|
|
|
|
|
static int l2cap_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
|
|
|
|
{
|
|
|
|
int exact = 0, lm1 = 0, lm2 = 0;
|
|
|
|
register struct sock *sk;
|
|
|
|
struct hlist_node *node;
|
|
|
|
|
|
|
|
if (type != ACL_LINK)
|
2010-06-22 18:56:28 +02:00
|
|
|
return -EINVAL;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
BT_DBG("hdev %s, bdaddr %s", hdev->name, batostr(bdaddr));
|
|
|
|
|
|
|
|
/* Find listening sockets and check their link_mode */
|
|
|
|
read_lock(&l2cap_sk_list.lock);
|
|
|
|
sk_for_each(sk, node, &l2cap_sk_list.head) {
|
|
|
|
if (sk->sk_state != BT_LISTEN)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
if (!bacmp(&bt_sk(sk)->src, &hdev->bdaddr)) {
|
2009-01-15 21:58:38 +01:00
|
|
|
lm1 |= HCI_LM_ACCEPT;
|
|
|
|
if (l2cap_pi(sk)->role_switch)
|
|
|
|
lm1 |= HCI_LM_MASTER;
|
2005-04-17 00:20:36 +02:00
|
|
|
exact++;
|
2009-01-15 21:58:38 +01:00
|
|
|
} else if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) {
|
|
|
|
lm2 |= HCI_LM_ACCEPT;
|
|
|
|
if (l2cap_pi(sk)->role_switch)
|
|
|
|
lm2 |= HCI_LM_MASTER;
|
|
|
|
}
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
read_unlock(&l2cap_sk_list.lock);
|
|
|
|
|
|
|
|
return exact ? lm1 : lm2;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int l2cap_connect_cfm(struct hci_conn *hcon, u8 status)
|
|
|
|
{
|
2006-07-03 10:02:46 +02:00
|
|
|
struct l2cap_conn *conn;
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
BT_DBG("hcon %p bdaddr %s status %d", hcon, batostr(&hcon->dst), status);
|
|
|
|
|
|
|
|
if (hcon->type != ACL_LINK)
|
2010-06-22 18:56:28 +02:00
|
|
|
return -EINVAL;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
if (!status) {
|
|
|
|
conn = l2cap_conn_add(hcon, status);
|
|
|
|
if (conn)
|
|
|
|
l2cap_conn_ready(conn);
|
2006-07-03 10:02:46 +02:00
|
|
|
} else
|
2005-04-17 00:20:36 +02:00
|
|
|
l2cap_conn_del(hcon, bt_err(status));
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2009-02-12 14:02:50 +01:00
|
|
|
static int l2cap_disconn_ind(struct hci_conn *hcon)
|
|
|
|
{
|
|
|
|
struct l2cap_conn *conn = hcon->l2cap_data;
|
|
|
|
|
|
|
|
BT_DBG("hcon %p", hcon);
|
|
|
|
|
|
|
|
if (hcon->type != ACL_LINK || !conn)
|
|
|
|
return 0x13;
|
|
|
|
|
|
|
|
return conn->disc_reason;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int l2cap_disconn_cfm(struct hci_conn *hcon, u8 reason)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
BT_DBG("hcon %p reason %d", hcon, reason);
|
|
|
|
|
|
|
|
if (hcon->type != ACL_LINK)
|
2010-06-22 18:56:28 +02:00
|
|
|
return -EINVAL;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
l2cap_conn_del(hcon, bt_err(reason));
|
2006-07-03 10:02:46 +02:00
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2009-01-15 21:58:44 +01:00
|
|
|
static inline void l2cap_check_encryption(struct sock *sk, u8 encrypt)
|
|
|
|
{
|
2010-05-01 21:15:42 +02:00
|
|
|
if (sk->sk_type != SOCK_SEQPACKET && sk->sk_type != SOCK_STREAM)
|
2009-02-04 21:07:19 +01:00
|
|
|
return;
|
|
|
|
|
2009-01-15 21:58:44 +01:00
|
|
|
if (encrypt == 0x00) {
|
|
|
|
if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM) {
|
|
|
|
l2cap_sock_clear_timer(sk);
|
|
|
|
l2cap_sock_set_timer(sk, HZ * 5);
|
|
|
|
} else if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH)
|
|
|
|
__l2cap_sock_close(sk, ECONNREFUSED);
|
|
|
|
} else {
|
|
|
|
if (l2cap_pi(sk)->sec_level == BT_SECURITY_MEDIUM)
|
|
|
|
l2cap_sock_clear_timer(sk);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2009-01-15 21:58:04 +01:00
|
|
|
static int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
struct l2cap_chan_list *l;
|
2006-07-03 10:02:46 +02:00
|
|
|
struct l2cap_conn *conn = hcon->l2cap_data;
|
2005-04-17 00:20:36 +02:00
|
|
|
struct sock *sk;
|
|
|
|
|
2006-07-03 10:02:46 +02:00
|
|
|
if (!conn)
|
2005-04-17 00:20:36 +02:00
|
|
|
return 0;
|
2006-07-03 10:02:46 +02:00
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
l = &conn->chan_list;
|
|
|
|
|
|
|
|
BT_DBG("conn %p", conn);
|
|
|
|
|
|
|
|
read_lock(&l->lock);
|
|
|
|
|
|
|
|
for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) {
|
|
|
|
bh_lock_sock(sk);
|
|
|
|
|
2009-02-06 23:56:36 +01:00
|
|
|
if (l2cap_pi(sk)->conf_state & L2CAP_CONF_CONNECT_PEND) {
|
|
|
|
bh_unlock_sock(sk);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
2009-01-15 21:58:44 +01:00
|
|
|
if (!status && (sk->sk_state == BT_CONNECTED ||
|
2009-01-15 21:58:04 +01:00
|
|
|
sk->sk_state == BT_CONFIG)) {
|
2009-01-15 21:58:44 +01:00
|
|
|
l2cap_check_encryption(sk, encrypt);
|
2008-07-14 20:13:45 +02:00
|
|
|
bh_unlock_sock(sk);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
2008-07-14 20:13:54 +02:00
|
|
|
if (sk->sk_state == BT_CONNECT) {
|
|
|
|
if (!status) {
|
|
|
|
struct l2cap_conn_req req;
|
|
|
|
req.scid = cpu_to_le16(l2cap_pi(sk)->scid);
|
|
|
|
req.psm = l2cap_pi(sk)->psm;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2008-07-14 20:13:54 +02:00
|
|
|
l2cap_pi(sk)->ident = l2cap_get_ident(conn);
|
2010-07-08 11:14:41 +02:00
|
|
|
l2cap_pi(sk)->conf_state |= L2CAP_CONF_CONNECT_PEND;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2008-07-14 20:13:54 +02:00
|
|
|
l2cap_send_cmd(conn, l2cap_pi(sk)->ident,
|
|
|
|
L2CAP_CONN_REQ, sizeof(req), &req);
|
|
|
|
} else {
|
|
|
|
l2cap_sock_clear_timer(sk);
|
|
|
|
l2cap_sock_set_timer(sk, HZ / 10);
|
|
|
|
}
|
|
|
|
} else if (sk->sk_state == BT_CONNECT2) {
|
|
|
|
struct l2cap_conn_rsp rsp;
|
|
|
|
__u16 result;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2008-07-14 20:13:54 +02:00
|
|
|
if (!status) {
|
|
|
|
sk->sk_state = BT_CONFIG;
|
|
|
|
result = L2CAP_CR_SUCCESS;
|
|
|
|
} else {
|
|
|
|
sk->sk_state = BT_DISCONN;
|
|
|
|
l2cap_sock_set_timer(sk, HZ / 10);
|
|
|
|
result = L2CAP_CR_SEC_BLOCK;
|
|
|
|
}
|
|
|
|
|
|
|
|
rsp.scid = cpu_to_le16(l2cap_pi(sk)->dcid);
|
|
|
|
rsp.dcid = cpu_to_le16(l2cap_pi(sk)->scid);
|
|
|
|
rsp.result = cpu_to_le16(result);
|
2008-09-09 07:19:20 +02:00
|
|
|
rsp.status = cpu_to_le16(L2CAP_CS_NO_INFO);
|
2008-07-14 20:13:54 +02:00
|
|
|
l2cap_send_cmd(conn, l2cap_pi(sk)->ident,
|
|
|
|
L2CAP_CONN_RSP, sizeof(rsp), &rsp);
|
|
|
|
}
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
bh_unlock_sock(sk);
|
|
|
|
}
|
|
|
|
|
|
|
|
read_unlock(&l->lock);
|
2008-07-14 20:13:54 +02:00
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags)
|
|
|
|
{
|
|
|
|
struct l2cap_conn *conn = hcon->l2cap_data;
|
|
|
|
|
2011-01-11 16:20:20 +01:00
|
|
|
if (!conn)
|
|
|
|
conn = l2cap_conn_add(hcon, 0);
|
|
|
|
|
|
|
|
if (!conn)
|
2005-04-17 00:20:36 +02:00
|
|
|
goto drop;
|
|
|
|
|
|
|
|
BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags);
|
|
|
|
|
2011-01-03 10:14:36 +01:00
|
|
|
if (!(flags & ACL_CONT)) {
|
2005-04-17 00:20:36 +02:00
|
|
|
struct l2cap_hdr *hdr;
|
2010-09-15 13:28:44 +02:00
|
|
|
struct sock *sk;
|
|
|
|
u16 cid;
|
2005-04-17 00:20:36 +02:00
|
|
|
int len;
|
|
|
|
|
|
|
|
if (conn->rx_len) {
|
|
|
|
BT_ERR("Unexpected start frame (len %d)", skb->len);
|
|
|
|
kfree_skb(conn->rx_skb);
|
|
|
|
conn->rx_skb = NULL;
|
|
|
|
conn->rx_len = 0;
|
|
|
|
l2cap_conn_unreliable(conn, ECOMM);
|
|
|
|
}
|
|
|
|
|
2010-09-15 13:28:43 +02:00
|
|
|
/* Start fragment always begin with Basic L2CAP header */
|
|
|
|
if (skb->len < L2CAP_HDR_SIZE) {
|
2005-04-17 00:20:36 +02:00
|
|
|
BT_ERR("Frame is too short (len %d)", skb->len);
|
|
|
|
l2cap_conn_unreliable(conn, ECOMM);
|
|
|
|
goto drop;
|
|
|
|
}
|
|
|
|
|
|
|
|
hdr = (struct l2cap_hdr *) skb->data;
|
|
|
|
len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE;
|
2010-09-15 13:28:44 +02:00
|
|
|
cid = __le16_to_cpu(hdr->cid);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
if (len == skb->len) {
|
|
|
|
/* Complete frame received */
|
|
|
|
l2cap_recv_frame(conn, skb);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
BT_DBG("Start: total len %d, frag len %d", len, skb->len);
|
|
|
|
|
|
|
|
if (skb->len > len) {
|
|
|
|
BT_ERR("Frame is too long (len %d, expected len %d)",
|
|
|
|
skb->len, len);
|
|
|
|
l2cap_conn_unreliable(conn, ECOMM);
|
|
|
|
goto drop;
|
|
|
|
}
|
|
|
|
|
2010-09-15 13:28:44 +02:00
|
|
|
sk = l2cap_get_chan_by_scid(&conn->chan_list, cid);
|
|
|
|
|
|
|
|
if (sk && l2cap_pi(sk)->imtu < len - L2CAP_HDR_SIZE) {
|
|
|
|
BT_ERR("Frame exceeding recv MTU (len %d, MTU %d)",
|
|
|
|
len, l2cap_pi(sk)->imtu);
|
|
|
|
bh_unlock_sock(sk);
|
|
|
|
l2cap_conn_unreliable(conn, ECOMM);
|
|
|
|
goto drop;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (sk)
|
|
|
|
bh_unlock_sock(sk);
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
/* Allocate skb for the complete frame (with header) */
|
2009-04-20 06:31:08 +02:00
|
|
|
conn->rx_skb = bt_skb_alloc(len, GFP_ATOMIC);
|
|
|
|
if (!conn->rx_skb)
|
2005-04-17 00:20:36 +02:00
|
|
|
goto drop;
|
|
|
|
|
2007-03-27 23:55:52 +02:00
|
|
|
skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len),
|
2009-02-09 09:18:02 +01:00
|
|
|
skb->len);
|
2005-04-17 00:20:36 +02:00
|
|
|
conn->rx_len = len - skb->len;
|
|
|
|
} else {
|
|
|
|
BT_DBG("Cont: frag len %d (expecting %d)", skb->len, conn->rx_len);
|
|
|
|
|
|
|
|
if (!conn->rx_len) {
|
|
|
|
BT_ERR("Unexpected continuation frame (len %d)", skb->len);
|
|
|
|
l2cap_conn_unreliable(conn, ECOMM);
|
|
|
|
goto drop;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (skb->len > conn->rx_len) {
|
|
|
|
BT_ERR("Fragment is too long (len %d, expected %d)",
|
|
|
|
skb->len, conn->rx_len);
|
|
|
|
kfree_skb(conn->rx_skb);
|
|
|
|
conn->rx_skb = NULL;
|
|
|
|
conn->rx_len = 0;
|
|
|
|
l2cap_conn_unreliable(conn, ECOMM);
|
|
|
|
goto drop;
|
|
|
|
}
|
|
|
|
|
2007-03-27 23:55:52 +02:00
|
|
|
skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len),
|
2009-02-09 09:18:02 +01:00
|
|
|
skb->len);
|
2005-04-17 00:20:36 +02:00
|
|
|
conn->rx_len -= skb->len;
|
|
|
|
|
|
|
|
if (!conn->rx_len) {
|
|
|
|
/* Complete frame received */
|
|
|
|
l2cap_recv_frame(conn, conn->rx_skb);
|
|
|
|
conn->rx_skb = NULL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
drop:
|
|
|
|
kfree_skb(skb);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-03-21 05:27:45 +01:00
|
|
|
static int l2cap_debugfs_show(struct seq_file *f, void *p)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
struct sock *sk;
|
|
|
|
struct hlist_node *node;
|
|
|
|
|
|
|
|
read_lock_bh(&l2cap_sk_list.lock);
|
|
|
|
|
2005-11-08 18:57:38 +01:00
|
|
|
sk_for_each(sk, node, &l2cap_sk_list.head) {
|
|
|
|
struct l2cap_pinfo *pi = l2cap_pi(sk);
|
2010-03-15 22:12:58 +01:00
|
|
|
|
2010-03-21 05:27:45 +01:00
|
|
|
seq_printf(f, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d %d\n",
|
|
|
|
batostr(&bt_sk(sk)->src),
|
|
|
|
batostr(&bt_sk(sk)->dst),
|
|
|
|
sk->sk_state, __le16_to_cpu(pi->psm),
|
|
|
|
pi->scid, pi->dcid,
|
|
|
|
pi->imtu, pi->omtu, pi->sec_level);
|
2005-11-08 18:57:38 +01:00
|
|
|
}
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
read_unlock_bh(&l2cap_sk_list.lock);
|
|
|
|
|
2010-03-21 05:27:45 +01:00
|
|
|
return 0;
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
2010-03-21 05:27:45 +01:00
|
|
|
static int l2cap_debugfs_open(struct inode *inode, struct file *file)
|
|
|
|
{
|
|
|
|
return single_open(file, l2cap_debugfs_show, inode->i_private);
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct file_operations l2cap_debugfs_fops = {
|
|
|
|
.open = l2cap_debugfs_open,
|
|
|
|
.read = seq_read,
|
|
|
|
.llseek = seq_lseek,
|
|
|
|
.release = single_release,
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct dentry *l2cap_debugfs;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
static struct hci_proto l2cap_hci_proto = {
|
|
|
|
.name = "L2CAP",
|
|
|
|
.id = HCI_PROTO_L2CAP,
|
|
|
|
.connect_ind = l2cap_connect_ind,
|
|
|
|
.connect_cfm = l2cap_connect_cfm,
|
|
|
|
.disconn_ind = l2cap_disconn_ind,
|
2009-02-12 14:02:50 +01:00
|
|
|
.disconn_cfm = l2cap_disconn_cfm,
|
2009-01-15 21:58:04 +01:00
|
|
|
.security_cfm = l2cap_security_cfm,
|
2005-04-17 00:20:36 +02:00
|
|
|
.recv_acldata = l2cap_recv_acldata
|
|
|
|
};
|
|
|
|
|
|
|
|
static int __init l2cap_init(void)
|
|
|
|
{
|
|
|
|
int err;
|
2005-11-08 18:57:38 +01:00
|
|
|
|
2011-02-03 23:50:35 +01:00
|
|
|
err = l2cap_init_sockets();
|
2005-04-17 00:20:36 +02:00
|
|
|
if (err < 0)
|
|
|
|
return err;
|
|
|
|
|
2010-05-01 21:15:44 +02:00
|
|
|
_busy_wq = create_singlethread_workqueue("l2cap");
|
2010-11-29 17:15:50 +01:00
|
|
|
if (!_busy_wq) {
|
2011-02-03 23:50:35 +01:00
|
|
|
err = -ENOMEM;
|
2005-04-17 00:20:36 +02:00
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
|
|
|
err = hci_register_proto(&l2cap_hci_proto);
|
|
|
|
if (err < 0) {
|
|
|
|
BT_ERR("L2CAP protocol registration failed");
|
|
|
|
bt_sock_unregister(BTPROTO_L2CAP);
|
|
|
|
goto error;
|
|
|
|
}
|
|
|
|
|
2010-03-21 05:27:45 +01:00
|
|
|
if (bt_debugfs) {
|
|
|
|
l2cap_debugfs = debugfs_create_file("l2cap", 0444,
|
|
|
|
bt_debugfs, NULL, &l2cap_debugfs_fops);
|
|
|
|
if (!l2cap_debugfs)
|
|
|
|
BT_ERR("Failed to create L2CAP debug file");
|
|
|
|
}
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
BT_INFO("L2CAP ver %s", VERSION);
|
|
|
|
BT_INFO("L2CAP socket layer initialized");
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
error:
|
2010-11-29 17:15:50 +01:00
|
|
|
destroy_workqueue(_busy_wq);
|
2011-02-03 23:50:35 +01:00
|
|
|
l2cap_cleanup_sockets();
|
2005-04-17 00:20:36 +02:00
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit l2cap_exit(void)
|
|
|
|
{
|
2010-03-21 05:27:45 +01:00
|
|
|
debugfs_remove(l2cap_debugfs);
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2010-05-01 21:15:44 +02:00
|
|
|
flush_workqueue(_busy_wq);
|
|
|
|
destroy_workqueue(_busy_wq);
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
if (hci_unregister_proto(&l2cap_hci_proto) < 0)
|
|
|
|
BT_ERR("L2CAP protocol unregistration failed");
|
|
|
|
|
2011-02-03 23:50:35 +01:00
|
|
|
l2cap_cleanup_sockets();
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
void l2cap_load(void)
|
|
|
|
{
|
|
|
|
/* Dummy function to trigger automatic L2CAP module loading by
|
|
|
|
* other modules that use L2CAP sockets but don't use any other
|
|
|
|
* symbols from it. */
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(l2cap_load);
|
|
|
|
|
|
|
|
module_init(l2cap_init);
|
|
|
|
module_exit(l2cap_exit);
|
|
|
|
|
2010-07-18 21:25:54 +02:00
|
|
|
module_param(disable_ertm, bool, 0644);
|
|
|
|
MODULE_PARM_DESC(disable_ertm, "Disable enhanced retransmission mode");
|
2009-05-03 04:09:01 +02:00
|
|
|
|
2008-08-18 13:23:53 +02:00
|
|
|
MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
|
2005-04-17 00:20:36 +02:00
|
|
|
MODULE_DESCRIPTION("Bluetooth L2CAP ver " VERSION);
|
|
|
|
MODULE_VERSION(VERSION);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
MODULE_ALIAS("bt-proto-0");
|