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1275 |
phoenix |
/*
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RFCOMM implementation for Linux Bluetooth stack (BlueZ).
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Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com>
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Copyright (C) 2002 Marcel Holtmann <marcel@holtmann.org>
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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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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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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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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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SOFTWARE IS DISCLAIMED.
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*/
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/*
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RPN support - Dirk Husemann <hud@zurich.ibm.com>
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*/
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/*
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* RFCOMM core.
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*
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* $Id: core.c,v 1.1.1.1 2004-04-15 01:17:12 phoenix Exp $
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*/
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#define __KERNEL_SYSCALLS__
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#include <linux/config.h>
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#include <linux/module.h>
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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/signal.h>
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#include <linux/init.h>
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#include <linux/wait.h>
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#include <linux/net.h>
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#include <linux/proc_fs.h>
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#include <net/sock.h>
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#include <asm/uaccess.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/l2cap.h>
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#include <net/bluetooth/rfcomm.h>
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#define VERSION "1.1"
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#ifndef CONFIG_BLUEZ_RFCOMM_DEBUG
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#undef BT_DBG
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#define BT_DBG(D...)
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#endif
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struct task_struct *rfcomm_thread;
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DECLARE_MUTEX(rfcomm_sem);
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unsigned long rfcomm_event;
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static LIST_HEAD(session_list);
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static atomic_t terminate, running;
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static int rfcomm_send_frame(struct rfcomm_session *s, u8 *data, int len);
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static int rfcomm_send_sabm(struct rfcomm_session *s, u8 dlci);
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static int rfcomm_send_disc(struct rfcomm_session *s, u8 dlci);
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static int rfcomm_queue_disc(struct rfcomm_dlc *d);
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static int rfcomm_send_nsc(struct rfcomm_session *s, int cr, u8 type);
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static int rfcomm_send_pn(struct rfcomm_session *s, int cr, struct rfcomm_dlc *d);
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static int rfcomm_send_msc(struct rfcomm_session *s, int cr, u8 dlci, u8 v24_sig);
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static int rfcomm_send_test(struct rfcomm_session *s, int cr, u8 *pattern, int len);
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static int rfcomm_send_credits(struct rfcomm_session *s, u8 addr, u8 credits);
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static void rfcomm_make_uih(struct sk_buff *skb, u8 addr);
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static void rfcomm_process_connect(struct rfcomm_session *s);
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/* ---- RFCOMM frame parsing macros ---- */
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#define __get_dlci(b) ((b & 0xfc) >> 2)
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#define __get_channel(b) ((b & 0xf8) >> 3)
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#define __get_dir(b) ((b & 0x04) >> 2)
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#define __get_type(b) ((b & 0xef))
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#define __test_ea(b) ((b & 0x01))
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#define __test_cr(b) ((b & 0x02))
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#define __test_pf(b) ((b & 0x10))
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#define __addr(cr, dlci) (((dlci & 0x3f) << 2) | (cr << 1) | 0x01)
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#define __ctrl(type, pf) (((type & 0xef) | (pf << 4)))
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#define __dlci(dir, chn) (((chn & 0x1f) << 1) | dir)
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#define __srv_channel(dlci) (dlci >> 1)
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#define __dir(dlci) (dlci & 0x01)
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#define __len8(len) (((len) << 1) | 1)
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#define __len16(len) ((len) << 1)
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/* MCC macros */
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#define __mcc_type(cr, type) (((type << 2) | (cr << 1) | 0x01))
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#define __get_mcc_type(b) ((b & 0xfc) >> 2)
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#define __get_mcc_len(b) ((b & 0xfe) >> 1)
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/* RPN macros */
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#define __rpn_line_settings(data, stop, parity) ((data & 0x3) | ((stop & 0x1) << 2) | ((parity & 0x3) << 3))
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#define __get_rpn_data_bits(line) ((line) & 0x3)
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#define __get_rpn_stop_bits(line) (((line) >> 2) & 0x1)
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#define __get_rpn_parity(line) (((line) >> 3) & 0x3)
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/* ---- RFCOMM FCS computation ---- */
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/* CRC on 2 bytes */
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#define __crc(data) (rfcomm_crc_table[rfcomm_crc_table[0xff ^ data[0]] ^ data[1]])
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/* FCS on 2 bytes */
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static inline u8 __fcs(u8 *data)
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{
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return (0xff - __crc(data));
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}
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/* FCS on 3 bytes */
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static inline u8 __fcs2(u8 *data)
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{
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return (0xff - rfcomm_crc_table[__crc(data) ^ data[2]]);
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}
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/* Check FCS */
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static inline int __check_fcs(u8 *data, int type, u8 fcs)
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{
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u8 f = __crc(data);
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if (type != RFCOMM_UIH)
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f = rfcomm_crc_table[f ^ data[2]];
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return rfcomm_crc_table[f ^ fcs] != 0xcf;
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}
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/* ---- L2CAP callbacks ---- */
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static void rfcomm_l2state_change(struct sock *sk)
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{
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BT_DBG("%p state %d", sk, sk->state);
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rfcomm_schedule(RFCOMM_SCHED_STATE);
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}
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static void rfcomm_l2data_ready(struct sock *sk, int bytes)
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{
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BT_DBG("%p bytes %d", sk, bytes);
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rfcomm_schedule(RFCOMM_SCHED_RX);
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}
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static int rfcomm_l2sock_create(struct socket **sock)
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{
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int err;
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BT_DBG("");
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err = sock_create(PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP, sock);
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if (!err) {
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struct sock *sk = (*sock)->sk;
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sk->data_ready = rfcomm_l2data_ready;
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sk->state_change = rfcomm_l2state_change;
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}
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return err;
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}
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/* ---- RFCOMM DLCs ---- */
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static void rfcomm_dlc_timeout(unsigned long arg)
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{
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struct rfcomm_dlc *d = (void *) arg;
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BT_DBG("dlc %p state %ld", d, d->state);
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set_bit(RFCOMM_TIMED_OUT, &d->flags);
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rfcomm_dlc_put(d);
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rfcomm_schedule(RFCOMM_SCHED_TIMEO);
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}
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static void rfcomm_dlc_set_timer(struct rfcomm_dlc *d, long timeout)
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{
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BT_DBG("dlc %p state %ld timeout %ld", d, d->state, timeout);
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if (!mod_timer(&d->timer, jiffies + timeout))
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rfcomm_dlc_hold(d);
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}
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static void rfcomm_dlc_clear_timer(struct rfcomm_dlc *d)
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{
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BT_DBG("dlc %p state %ld", d, d->state);
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if (timer_pending(&d->timer) && del_timer(&d->timer))
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rfcomm_dlc_put(d);
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}
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static void rfcomm_dlc_clear_state(struct rfcomm_dlc *d)
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{
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BT_DBG("%p", d);
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d->state = BT_OPEN;
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d->flags = 0;
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d->mscex = 0;
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d->mtu = RFCOMM_DEFAULT_MTU;
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d->v24_sig = RFCOMM_V24_RTC | RFCOMM_V24_RTR | RFCOMM_V24_DV;
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d->cfc = RFCOMM_CFC_DISABLED;
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d->rx_credits = RFCOMM_DEFAULT_CREDITS;
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}
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struct rfcomm_dlc *rfcomm_dlc_alloc(int prio)
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{
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struct rfcomm_dlc *d = kmalloc(sizeof(*d), prio);
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if (!d)
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return NULL;
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memset(d, 0, sizeof(*d));
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| 215 |
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init_timer(&d->timer);
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d->timer.function = rfcomm_dlc_timeout;
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d->timer.data = (unsigned long) d;
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skb_queue_head_init(&d->tx_queue);
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spin_lock_init(&d->lock);
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atomic_set(&d->refcnt, 1);
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| 223 |
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| 224 |
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rfcomm_dlc_clear_state(d);
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| 225 |
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| 226 |
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BT_DBG("%p", d);
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return d;
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| 228 |
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}
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| 229 |
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| 230 |
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void rfcomm_dlc_free(struct rfcomm_dlc *d)
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| 231 |
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{
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| 232 |
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BT_DBG("%p", d);
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| 233 |
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| 234 |
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skb_queue_purge(&d->tx_queue);
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| 235 |
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kfree(d);
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| 236 |
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}
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| 237 |
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| 238 |
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static void rfcomm_dlc_link(struct rfcomm_session *s, struct rfcomm_dlc *d)
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| 239 |
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{
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| 240 |
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BT_DBG("dlc %p session %p", d, s);
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| 241 |
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| 242 |
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rfcomm_session_hold(s);
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| 243 |
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| 244 |
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rfcomm_dlc_hold(d);
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list_add(&d->list, &s->dlcs);
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d->session = s;
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| 247 |
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}
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| 248 |
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| 249 |
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static void rfcomm_dlc_unlink(struct rfcomm_dlc *d)
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| 250 |
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{
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| 251 |
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struct rfcomm_session *s = d->session;
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| 252 |
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| 253 |
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BT_DBG("dlc %p refcnt %d session %p", d, atomic_read(&d->refcnt), s);
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| 254 |
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| 255 |
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list_del(&d->list);
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| 256 |
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d->session = NULL;
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| 257 |
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rfcomm_dlc_put(d);
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| 258 |
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| 259 |
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rfcomm_session_put(s);
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| 260 |
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}
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| 261 |
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| 262 |
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static struct rfcomm_dlc *rfcomm_dlc_get(struct rfcomm_session *s, u8 dlci)
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| 263 |
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{
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| 264 |
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struct rfcomm_dlc *d;
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| 265 |
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struct list_head *p;
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| 266 |
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| 267 |
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list_for_each(p, &s->dlcs) {
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| 268 |
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d = list_entry(p, struct rfcomm_dlc, list);
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| 269 |
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if (d->dlci == dlci)
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| 270 |
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return d;
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| 271 |
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}
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| 272 |
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return NULL;
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| 273 |
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}
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| 274 |
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| 275 |
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static int __rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst, u8 channel)
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| 276 |
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{
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| 277 |
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struct rfcomm_session *s;
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| 278 |
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int err = 0;
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| 279 |
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u8 dlci;
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| 280 |
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| 281 |
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BT_DBG("dlc %p state %ld %s %s channel %d",
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| 282 |
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d, d->state, batostr(src), batostr(dst), channel);
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| 283 |
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| 284 |
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if (channel < 1 || channel > 30)
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| 285 |
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return -EINVAL;
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| 286 |
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| 287 |
|
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if (d->state != BT_OPEN && d->state != BT_CLOSED)
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| 288 |
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return 0;
|
| 289 |
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| 290 |
|
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s = rfcomm_session_get(src, dst);
|
| 291 |
|
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if (!s) {
|
| 292 |
|
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s = rfcomm_session_create(src, dst, &err);
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| 293 |
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if (!s)
|
| 294 |
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return err;
|
| 295 |
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}
|
| 296 |
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| 297 |
|
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dlci = __dlci(!s->initiator, channel);
|
| 298 |
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|
| 299 |
|
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/* Check if DLCI already exists */
|
| 300 |
|
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if (rfcomm_dlc_get(s, dlci))
|
| 301 |
|
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return -EBUSY;
|
| 302 |
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| 303 |
|
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rfcomm_dlc_clear_state(d);
|
| 304 |
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| 305 |
|
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d->dlci = dlci;
|
| 306 |
|
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d->addr = __addr(s->initiator, dlci);
|
| 307 |
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d->priority = 7;
|
| 308 |
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| 309 |
|
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d->state = BT_CONFIG;
|
| 310 |
|
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rfcomm_dlc_link(s, d);
|
| 311 |
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| 312 |
|
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d->mtu = s->mtu;
|
| 313 |
|
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d->cfc = (s->cfc == RFCOMM_CFC_UNKNOWN) ? 0 : s->cfc;
|
| 314 |
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| 315 |
|
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if (s->state == BT_CONNECTED)
|
| 316 |
|
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rfcomm_send_pn(s, 1, d);
|
| 317 |
|
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rfcomm_dlc_set_timer(d, RFCOMM_CONN_TIMEOUT);
|
| 318 |
|
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return 0;
|
| 319 |
|
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}
|
| 320 |
|
|
|
| 321 |
|
|
int rfcomm_dlc_open(struct rfcomm_dlc *d, bdaddr_t *src, bdaddr_t *dst, u8 channel)
|
| 322 |
|
|
{
|
| 323 |
|
|
mm_segment_t fs;
|
| 324 |
|
|
int r;
|
| 325 |
|
|
|
| 326 |
|
|
rfcomm_lock();
|
| 327 |
|
|
|
| 328 |
|
|
fs = get_fs(); set_fs(KERNEL_DS);
|
| 329 |
|
|
r = __rfcomm_dlc_open(d, src, dst, channel);
|
| 330 |
|
|
set_fs(fs);
|
| 331 |
|
|
|
| 332 |
|
|
rfcomm_unlock();
|
| 333 |
|
|
return r;
|
| 334 |
|
|
}
|
| 335 |
|
|
|
| 336 |
|
|
static int __rfcomm_dlc_close(struct rfcomm_dlc *d, int err)
|
| 337 |
|
|
{
|
| 338 |
|
|
struct rfcomm_session *s = d->session;
|
| 339 |
|
|
if (!s)
|
| 340 |
|
|
return 0;
|
| 341 |
|
|
|
| 342 |
|
|
BT_DBG("dlc %p state %ld dlci %d err %d session %p",
|
| 343 |
|
|
d, d->state, d->dlci, err, s);
|
| 344 |
|
|
|
| 345 |
|
|
switch (d->state) {
|
| 346 |
|
|
case BT_CONNECTED:
|
| 347 |
|
|
case BT_CONFIG:
|
| 348 |
|
|
case BT_CONNECT:
|
| 349 |
|
|
d->state = BT_DISCONN;
|
| 350 |
|
|
if (skb_queue_empty(&d->tx_queue)) {
|
| 351 |
|
|
rfcomm_send_disc(s, d->dlci);
|
| 352 |
|
|
rfcomm_dlc_set_timer(d, RFCOMM_DISC_TIMEOUT);
|
| 353 |
|
|
} else {
|
| 354 |
|
|
rfcomm_queue_disc(d);
|
| 355 |
|
|
rfcomm_dlc_set_timer(d, RFCOMM_DISC_TIMEOUT * 2);
|
| 356 |
|
|
}
|
| 357 |
|
|
break;
|
| 358 |
|
|
|
| 359 |
|
|
default:
|
| 360 |
|
|
rfcomm_dlc_clear_timer(d);
|
| 361 |
|
|
|
| 362 |
|
|
rfcomm_dlc_lock(d);
|
| 363 |
|
|
d->state = BT_CLOSED;
|
| 364 |
|
|
d->state_change(d, err);
|
| 365 |
|
|
rfcomm_dlc_unlock(d);
|
| 366 |
|
|
|
| 367 |
|
|
skb_queue_purge(&d->tx_queue);
|
| 368 |
|
|
rfcomm_dlc_unlink(d);
|
| 369 |
|
|
}
|
| 370 |
|
|
|
| 371 |
|
|
return 0;
|
| 372 |
|
|
}
|
| 373 |
|
|
|
| 374 |
|
|
int rfcomm_dlc_close(struct rfcomm_dlc *d, int err)
|
| 375 |
|
|
{
|
| 376 |
|
|
mm_segment_t fs;
|
| 377 |
|
|
int r;
|
| 378 |
|
|
|
| 379 |
|
|
rfcomm_lock();
|
| 380 |
|
|
|
| 381 |
|
|
fs = get_fs(); set_fs(KERNEL_DS);
|
| 382 |
|
|
r = __rfcomm_dlc_close(d, err);
|
| 383 |
|
|
set_fs(fs);
|
| 384 |
|
|
|
| 385 |
|
|
rfcomm_unlock();
|
| 386 |
|
|
return r;
|
| 387 |
|
|
}
|
| 388 |
|
|
|
| 389 |
|
|
int rfcomm_dlc_send(struct rfcomm_dlc *d, struct sk_buff *skb)
|
| 390 |
|
|
{
|
| 391 |
|
|
int len = skb->len;
|
| 392 |
|
|
|
| 393 |
|
|
if (d->state != BT_CONNECTED)
|
| 394 |
|
|
return -ENOTCONN;
|
| 395 |
|
|
|
| 396 |
|
|
BT_DBG("dlc %p mtu %d len %d", d, d->mtu, len);
|
| 397 |
|
|
|
| 398 |
|
|
if (len > d->mtu)
|
| 399 |
|
|
return -EINVAL;
|
| 400 |
|
|
|
| 401 |
|
|
rfcomm_make_uih(skb, d->addr);
|
| 402 |
|
|
skb_queue_tail(&d->tx_queue, skb);
|
| 403 |
|
|
|
| 404 |
|
|
if (!test_bit(RFCOMM_TX_THROTTLED, &d->flags))
|
| 405 |
|
|
rfcomm_schedule(RFCOMM_SCHED_TX);
|
| 406 |
|
|
return len;
|
| 407 |
|
|
}
|
| 408 |
|
|
|
| 409 |
|
|
void __rfcomm_dlc_throttle(struct rfcomm_dlc *d)
|
| 410 |
|
|
{
|
| 411 |
|
|
BT_DBG("dlc %p state %ld", d, d->state);
|
| 412 |
|
|
|
| 413 |
|
|
if (!d->cfc) {
|
| 414 |
|
|
d->v24_sig |= RFCOMM_V24_FC;
|
| 415 |
|
|
set_bit(RFCOMM_MSC_PENDING, &d->flags);
|
| 416 |
|
|
}
|
| 417 |
|
|
rfcomm_schedule(RFCOMM_SCHED_TX);
|
| 418 |
|
|
}
|
| 419 |
|
|
|
| 420 |
|
|
void __rfcomm_dlc_unthrottle(struct rfcomm_dlc *d)
|
| 421 |
|
|
{
|
| 422 |
|
|
BT_DBG("dlc %p state %ld", d, d->state);
|
| 423 |
|
|
|
| 424 |
|
|
if (!d->cfc) {
|
| 425 |
|
|
d->v24_sig &= ~RFCOMM_V24_FC;
|
| 426 |
|
|
set_bit(RFCOMM_MSC_PENDING, &d->flags);
|
| 427 |
|
|
}
|
| 428 |
|
|
rfcomm_schedule(RFCOMM_SCHED_TX);
|
| 429 |
|
|
}
|
| 430 |
|
|
|
| 431 |
|
|
/*
|
| 432 |
|
|
Set/get modem status functions use _local_ status i.e. what we report
|
| 433 |
|
|
to the other side.
|
| 434 |
|
|
Remote status is provided by dlc->modem_status() callback.
|
| 435 |
|
|
*/
|
| 436 |
|
|
int rfcomm_dlc_set_modem_status(struct rfcomm_dlc *d, u8 v24_sig)
|
| 437 |
|
|
{
|
| 438 |
|
|
BT_DBG("dlc %p state %ld v24_sig 0x%x",
|
| 439 |
|
|
d, d->state, v24_sig);
|
| 440 |
|
|
|
| 441 |
|
|
if (test_bit(RFCOMM_RX_THROTTLED, &d->flags))
|
| 442 |
|
|
v24_sig |= RFCOMM_V24_FC;
|
| 443 |
|
|
else
|
| 444 |
|
|
v24_sig &= ~RFCOMM_V24_FC;
|
| 445 |
|
|
|
| 446 |
|
|
d->v24_sig = v24_sig;
|
| 447 |
|
|
|
| 448 |
|
|
if (!test_and_set_bit(RFCOMM_MSC_PENDING, &d->flags))
|
| 449 |
|
|
rfcomm_schedule(RFCOMM_SCHED_TX);
|
| 450 |
|
|
|
| 451 |
|
|
return 0;
|
| 452 |
|
|
}
|
| 453 |
|
|
|
| 454 |
|
|
int rfcomm_dlc_get_modem_status(struct rfcomm_dlc *d, u8 *v24_sig)
|
| 455 |
|
|
{
|
| 456 |
|
|
BT_DBG("dlc %p state %ld v24_sig 0x%x",
|
| 457 |
|
|
d, d->state, d->v24_sig);
|
| 458 |
|
|
|
| 459 |
|
|
*v24_sig = d->v24_sig;
|
| 460 |
|
|
return 0;
|
| 461 |
|
|
}
|
| 462 |
|
|
|
| 463 |
|
|
/* ---- RFCOMM sessions ---- */
|
| 464 |
|
|
struct rfcomm_session *rfcomm_session_add(struct socket *sock, int state)
|
| 465 |
|
|
{
|
| 466 |
|
|
struct rfcomm_session *s = kmalloc(sizeof(*s), GFP_KERNEL);
|
| 467 |
|
|
if (!s)
|
| 468 |
|
|
return NULL;
|
| 469 |
|
|
memset(s, 0, sizeof(*s));
|
| 470 |
|
|
|
| 471 |
|
|
BT_DBG("session %p sock %p", s, sock);
|
| 472 |
|
|
|
| 473 |
|
|
INIT_LIST_HEAD(&s->dlcs);
|
| 474 |
|
|
s->state = state;
|
| 475 |
|
|
s->sock = sock;
|
| 476 |
|
|
|
| 477 |
|
|
s->mtu = RFCOMM_DEFAULT_MTU;
|
| 478 |
|
|
s->cfc = RFCOMM_CFC_UNKNOWN;
|
| 479 |
|
|
|
| 480 |
|
|
list_add(&s->list, &session_list);
|
| 481 |
|
|
|
| 482 |
|
|
/* Do not increment module usage count for listeting sessions.
|
| 483 |
|
|
* Otherwise we won't be able to unload the module. */
|
| 484 |
|
|
if (state != BT_LISTEN)
|
| 485 |
|
|
MOD_INC_USE_COUNT;
|
| 486 |
|
|
return s;
|
| 487 |
|
|
}
|
| 488 |
|
|
|
| 489 |
|
|
void rfcomm_session_del(struct rfcomm_session *s)
|
| 490 |
|
|
{
|
| 491 |
|
|
int state = s->state;
|
| 492 |
|
|
|
| 493 |
|
|
BT_DBG("session %p state %ld", s, s->state);
|
| 494 |
|
|
|
| 495 |
|
|
list_del(&s->list);
|
| 496 |
|
|
|
| 497 |
|
|
if (state == BT_CONNECTED)
|
| 498 |
|
|
rfcomm_send_disc(s, 0);
|
| 499 |
|
|
|
| 500 |
|
|
sock_release(s->sock);
|
| 501 |
|
|
kfree(s);
|
| 502 |
|
|
|
| 503 |
|
|
if (state != BT_LISTEN)
|
| 504 |
|
|
MOD_DEC_USE_COUNT;
|
| 505 |
|
|
}
|
| 506 |
|
|
|
| 507 |
|
|
struct rfcomm_session *rfcomm_session_get(bdaddr_t *src, bdaddr_t *dst)
|
| 508 |
|
|
{
|
| 509 |
|
|
struct rfcomm_session *s;
|
| 510 |
|
|
struct list_head *p, *n;
|
| 511 |
|
|
struct bluez_pinfo *pi;
|
| 512 |
|
|
list_for_each_safe(p, n, &session_list) {
|
| 513 |
|
|
s = list_entry(p, struct rfcomm_session, list);
|
| 514 |
|
|
pi = bluez_pi(s->sock->sk);
|
| 515 |
|
|
|
| 516 |
|
|
if ((!bacmp(src, BDADDR_ANY) || !bacmp(&pi->src, src)) &&
|
| 517 |
|
|
!bacmp(&pi->dst, dst))
|
| 518 |
|
|
return s;
|
| 519 |
|
|
}
|
| 520 |
|
|
return NULL;
|
| 521 |
|
|
}
|
| 522 |
|
|
|
| 523 |
|
|
void rfcomm_session_close(struct rfcomm_session *s, int err)
|
| 524 |
|
|
{
|
| 525 |
|
|
struct rfcomm_dlc *d;
|
| 526 |
|
|
struct list_head *p, *n;
|
| 527 |
|
|
|
| 528 |
|
|
BT_DBG("session %p state %ld err %d", s, s->state, err);
|
| 529 |
|
|
|
| 530 |
|
|
rfcomm_session_hold(s);
|
| 531 |
|
|
|
| 532 |
|
|
s->state = BT_CLOSED;
|
| 533 |
|
|
|
| 534 |
|
|
/* Close all dlcs */
|
| 535 |
|
|
list_for_each_safe(p, n, &s->dlcs) {
|
| 536 |
|
|
d = list_entry(p, struct rfcomm_dlc, list);
|
| 537 |
|
|
d->state = BT_CLOSED;
|
| 538 |
|
|
__rfcomm_dlc_close(d, err);
|
| 539 |
|
|
}
|
| 540 |
|
|
|
| 541 |
|
|
rfcomm_session_put(s);
|
| 542 |
|
|
}
|
| 543 |
|
|
|
| 544 |
|
|
struct rfcomm_session *rfcomm_session_create(bdaddr_t *src, bdaddr_t *dst, int *err)
|
| 545 |
|
|
{
|
| 546 |
|
|
struct rfcomm_session *s = NULL;
|
| 547 |
|
|
struct sockaddr_l2 addr;
|
| 548 |
|
|
struct l2cap_options opts;
|
| 549 |
|
|
struct socket *sock;
|
| 550 |
|
|
int size;
|
| 551 |
|
|
|
| 552 |
|
|
BT_DBG("%s %s", batostr(src), batostr(dst));
|
| 553 |
|
|
|
| 554 |
|
|
*err = rfcomm_l2sock_create(&sock);
|
| 555 |
|
|
if (*err < 0)
|
| 556 |
|
|
return NULL;
|
| 557 |
|
|
|
| 558 |
|
|
bacpy(&addr.l2_bdaddr, src);
|
| 559 |
|
|
addr.l2_family = AF_BLUETOOTH;
|
| 560 |
|
|
addr.l2_psm = 0;
|
| 561 |
|
|
*err = sock->ops->bind(sock, (struct sockaddr *) &addr, sizeof(addr));
|
| 562 |
|
|
if (*err < 0)
|
| 563 |
|
|
goto failed;
|
| 564 |
|
|
|
| 565 |
|
|
/* Set L2CAP options */
|
| 566 |
|
|
size = sizeof(opts);
|
| 567 |
|
|
sock->ops->getsockopt(sock, SOL_L2CAP, L2CAP_OPTIONS, (void *)&opts, &size);
|
| 568 |
|
|
|
| 569 |
|
|
opts.imtu = RFCOMM_MAX_L2CAP_MTU;
|
| 570 |
|
|
sock->ops->setsockopt(sock, SOL_L2CAP, L2CAP_OPTIONS, (void *)&opts, size);
|
| 571 |
|
|
|
| 572 |
|
|
s = rfcomm_session_add(sock, BT_BOUND);
|
| 573 |
|
|
if (!s) {
|
| 574 |
|
|
*err = -ENOMEM;
|
| 575 |
|
|
goto failed;
|
| 576 |
|
|
}
|
| 577 |
|
|
|
| 578 |
|
|
s->initiator = 1;
|
| 579 |
|
|
|
| 580 |
|
|
bacpy(&addr.l2_bdaddr, dst);
|
| 581 |
|
|
addr.l2_family = AF_BLUETOOTH;
|
| 582 |
|
|
addr.l2_psm = htobs(RFCOMM_PSM);
|
| 583 |
|
|
*err = sock->ops->connect(sock, (struct sockaddr *) &addr, sizeof(addr), O_NONBLOCK);
|
| 584 |
|
|
if (*err == 0 || *err == -EAGAIN)
|
| 585 |
|
|
return s;
|
| 586 |
|
|
|
| 587 |
|
|
rfcomm_session_del(s);
|
| 588 |
|
|
return NULL;
|
| 589 |
|
|
|
| 590 |
|
|
failed:
|
| 591 |
|
|
sock_release(sock);
|
| 592 |
|
|
return NULL;
|
| 593 |
|
|
}
|
| 594 |
|
|
|
| 595 |
|
|
void rfcomm_session_getaddr(struct rfcomm_session *s, bdaddr_t *src, bdaddr_t *dst)
|
| 596 |
|
|
{
|
| 597 |
|
|
struct sock *sk = s->sock->sk;
|
| 598 |
|
|
if (src)
|
| 599 |
|
|
bacpy(src, &bluez_pi(sk)->src);
|
| 600 |
|
|
if (dst)
|
| 601 |
|
|
bacpy(dst, &bluez_pi(sk)->dst);
|
| 602 |
|
|
}
|
| 603 |
|
|
|
| 604 |
|
|
/* ---- RFCOMM frame sending ---- */
|
| 605 |
|
|
static int rfcomm_send_frame(struct rfcomm_session *s, u8 *data, int len)
|
| 606 |
|
|
{
|
| 607 |
|
|
struct socket *sock = s->sock;
|
| 608 |
|
|
struct iovec iv = { data, len };
|
| 609 |
|
|
struct msghdr msg;
|
| 610 |
|
|
int err;
|
| 611 |
|
|
|
| 612 |
|
|
BT_DBG("session %p len %d", s, len);
|
| 613 |
|
|
|
| 614 |
|
|
memset(&msg, 0, sizeof(msg));
|
| 615 |
|
|
msg.msg_iovlen = 1;
|
| 616 |
|
|
msg.msg_iov = &iv;
|
| 617 |
|
|
|
| 618 |
|
|
err = sock->ops->sendmsg(sock, &msg, len, 0);
|
| 619 |
|
|
return err;
|
| 620 |
|
|
}
|
| 621 |
|
|
|
| 622 |
|
|
static int rfcomm_send_sabm(struct rfcomm_session *s, u8 dlci)
|
| 623 |
|
|
{
|
| 624 |
|
|
struct rfcomm_cmd cmd;
|
| 625 |
|
|
|
| 626 |
|
|
BT_DBG("%p dlci %d", s, dlci);
|
| 627 |
|
|
|
| 628 |
|
|
cmd.addr = __addr(s->initiator, dlci);
|
| 629 |
|
|
cmd.ctrl = __ctrl(RFCOMM_SABM, 1);
|
| 630 |
|
|
cmd.len = __len8(0);
|
| 631 |
|
|
cmd.fcs = __fcs2((u8 *) &cmd);
|
| 632 |
|
|
|
| 633 |
|
|
return rfcomm_send_frame(s, (void *) &cmd, sizeof(cmd));
|
| 634 |
|
|
}
|
| 635 |
|
|
|
| 636 |
|
|
static int rfcomm_send_ua(struct rfcomm_session *s, u8 dlci)
|
| 637 |
|
|
{
|
| 638 |
|
|
struct rfcomm_cmd cmd;
|
| 639 |
|
|
|
| 640 |
|
|
BT_DBG("%p dlci %d", s, dlci);
|
| 641 |
|
|
|
| 642 |
|
|
cmd.addr = __addr(!s->initiator, dlci);
|
| 643 |
|
|
cmd.ctrl = __ctrl(RFCOMM_UA, 1);
|
| 644 |
|
|
cmd.len = __len8(0);
|
| 645 |
|
|
cmd.fcs = __fcs2((u8 *) &cmd);
|
| 646 |
|
|
|
| 647 |
|
|
return rfcomm_send_frame(s, (void *) &cmd, sizeof(cmd));
|
| 648 |
|
|
}
|
| 649 |
|
|
|
| 650 |
|
|
static int rfcomm_send_disc(struct rfcomm_session *s, u8 dlci)
|
| 651 |
|
|
{
|
| 652 |
|
|
struct rfcomm_cmd cmd;
|
| 653 |
|
|
|
| 654 |
|
|
BT_DBG("%p dlci %d", s, dlci);
|
| 655 |
|
|
|
| 656 |
|
|
cmd.addr = __addr(s->initiator, dlci);
|
| 657 |
|
|
cmd.ctrl = __ctrl(RFCOMM_DISC, 1);
|
| 658 |
|
|
cmd.len = __len8(0);
|
| 659 |
|
|
cmd.fcs = __fcs2((u8 *) &cmd);
|
| 660 |
|
|
|
| 661 |
|
|
return rfcomm_send_frame(s, (void *) &cmd, sizeof(cmd));
|
| 662 |
|
|
}
|
| 663 |
|
|
|
| 664 |
|
|
static int rfcomm_queue_disc(struct rfcomm_dlc *d)
|
| 665 |
|
|
{
|
| 666 |
|
|
struct rfcomm_cmd *cmd;
|
| 667 |
|
|
struct sk_buff *skb;
|
| 668 |
|
|
|
| 669 |
|
|
BT_DBG("dlc %p dlci %d", d, d->dlci);
|
| 670 |
|
|
|
| 671 |
|
|
skb = alloc_skb(sizeof(*cmd), GFP_KERNEL);
|
| 672 |
|
|
if (!skb)
|
| 673 |
|
|
return -ENOMEM;
|
| 674 |
|
|
|
| 675 |
|
|
cmd = (void *) __skb_put(skb, sizeof(*cmd));
|
| 676 |
|
|
cmd->addr = d->addr;
|
| 677 |
|
|
cmd->ctrl = __ctrl(RFCOMM_DISC, 1);
|
| 678 |
|
|
cmd->len = __len8(0);
|
| 679 |
|
|
cmd->fcs = __fcs2((u8 *) cmd);
|
| 680 |
|
|
|
| 681 |
|
|
skb_queue_tail(&d->tx_queue, skb);
|
| 682 |
|
|
rfcomm_schedule(RFCOMM_SCHED_TX);
|
| 683 |
|
|
return 0;
|
| 684 |
|
|
}
|
| 685 |
|
|
|
| 686 |
|
|
static int rfcomm_send_dm(struct rfcomm_session *s, u8 dlci)
|
| 687 |
|
|
{
|
| 688 |
|
|
struct rfcomm_cmd cmd;
|
| 689 |
|
|
|
| 690 |
|
|
BT_DBG("%p dlci %d", s, dlci);
|
| 691 |
|
|
|
| 692 |
|
|
cmd.addr = __addr(!s->initiator, dlci);
|
| 693 |
|
|
cmd.ctrl = __ctrl(RFCOMM_DM, 1);
|
| 694 |
|
|
cmd.len = __len8(0);
|
| 695 |
|
|
cmd.fcs = __fcs2((u8 *) &cmd);
|
| 696 |
|
|
|
| 697 |
|
|
return rfcomm_send_frame(s, (void *) &cmd, sizeof(cmd));
|
| 698 |
|
|
}
|
| 699 |
|
|
|
| 700 |
|
|
static int rfcomm_send_nsc(struct rfcomm_session *s, int cr, u8 type)
|
| 701 |
|
|
{
|
| 702 |
|
|
struct rfcomm_hdr *hdr;
|
| 703 |
|
|
struct rfcomm_mcc *mcc;
|
| 704 |
|
|
u8 buf[16], *ptr = buf;
|
| 705 |
|
|
|
| 706 |
|
|
BT_DBG("%p cr %d type %d", s, cr, type);
|
| 707 |
|
|
|
| 708 |
|
|
hdr = (void *) ptr; ptr += sizeof(*hdr);
|
| 709 |
|
|
hdr->addr = __addr(s->initiator, 0);
|
| 710 |
|
|
hdr->ctrl = __ctrl(RFCOMM_UIH, 0);
|
| 711 |
|
|
hdr->len = __len8(sizeof(*mcc) + 1);
|
| 712 |
|
|
|
| 713 |
|
|
mcc = (void *) ptr; ptr += sizeof(*mcc);
|
| 714 |
|
|
mcc->type = __mcc_type(cr, RFCOMM_NSC);
|
| 715 |
|
|
mcc->len = __len8(1);
|
| 716 |
|
|
|
| 717 |
|
|
/* Type that we didn't like */
|
| 718 |
|
|
*ptr = __mcc_type(cr, type); ptr++;
|
| 719 |
|
|
|
| 720 |
|
|
*ptr = __fcs(buf); ptr++;
|
| 721 |
|
|
|
| 722 |
|
|
return rfcomm_send_frame(s, buf, ptr - buf);
|
| 723 |
|
|
}
|
| 724 |
|
|
|
| 725 |
|
|
static int rfcomm_send_pn(struct rfcomm_session *s, int cr, struct rfcomm_dlc *d)
|
| 726 |
|
|
{
|
| 727 |
|
|
struct rfcomm_hdr *hdr;
|
| 728 |
|
|
struct rfcomm_mcc *mcc;
|
| 729 |
|
|
struct rfcomm_pn *pn;
|
| 730 |
|
|
u8 buf[16], *ptr = buf;
|
| 731 |
|
|
|
| 732 |
|
|
BT_DBG("%p cr %d dlci %d mtu %d", s, cr, d->dlci, d->mtu);
|
| 733 |
|
|
|
| 734 |
|
|
hdr = (void *) ptr; ptr += sizeof(*hdr);
|
| 735 |
|
|
hdr->addr = __addr(s->initiator, 0);
|
| 736 |
|
|
hdr->ctrl = __ctrl(RFCOMM_UIH, 0);
|
| 737 |
|
|
hdr->len = __len8(sizeof(*mcc) + sizeof(*pn));
|
| 738 |
|
|
|
| 739 |
|
|
mcc = (void *) ptr; ptr += sizeof(*mcc);
|
| 740 |
|
|
mcc->type = __mcc_type(cr, RFCOMM_PN);
|
| 741 |
|
|
mcc->len = __len8(sizeof(*pn));
|
| 742 |
|
|
|
| 743 |
|
|
pn = (void *) ptr; ptr += sizeof(*pn);
|
| 744 |
|
|
pn->dlci = d->dlci;
|
| 745 |
|
|
pn->priority = d->priority;
|
| 746 |
|
|
pn->ack_timer = 0;
|
| 747 |
|
|
pn->max_retrans = 0;
|
| 748 |
|
|
|
| 749 |
|
|
if (s->cfc) {
|
| 750 |
|
|
pn->flow_ctrl = cr ? 0xf0 : 0xe0;
|
| 751 |
|
|
pn->credits = RFCOMM_DEFAULT_CREDITS;
|
| 752 |
|
|
} else {
|
| 753 |
|
|
pn->flow_ctrl = 0;
|
| 754 |
|
|
pn->credits = 0;
|
| 755 |
|
|
}
|
| 756 |
|
|
|
| 757 |
|
|
pn->mtu = htobs(d->mtu);
|
| 758 |
|
|
|
| 759 |
|
|
*ptr = __fcs(buf); ptr++;
|
| 760 |
|
|
|
| 761 |
|
|
return rfcomm_send_frame(s, buf, ptr - buf);
|
| 762 |
|
|
}
|
| 763 |
|
|
|
| 764 |
|
|
static int rfcomm_send_rpn(struct rfcomm_session *s, int cr, u8 dlci,
|
| 765 |
|
|
u8 bit_rate, u8 data_bits, u8 stop_bits,
|
| 766 |
|
|
u8 parity, u8 flow_ctrl_settings,
|
| 767 |
|
|
u8 xon_char, u8 xoff_char, u16 param_mask)
|
| 768 |
|
|
{
|
| 769 |
|
|
struct rfcomm_hdr *hdr;
|
| 770 |
|
|
struct rfcomm_mcc *mcc;
|
| 771 |
|
|
struct rfcomm_rpn *rpn;
|
| 772 |
|
|
u8 buf[16], *ptr = buf;
|
| 773 |
|
|
|
| 774 |
|
|
BT_DBG("%p cr %d dlci %d bit_r 0x%x data_b 0x%x stop_b 0x%x parity 0x%x"
|
| 775 |
|
|
"flwc_s 0x%x xon_c 0x%x xoff_c 0x%x p_mask 0x%x",
|
| 776 |
|
|
s, cr, dlci, bit_rate, data_bits, stop_bits, parity,
|
| 777 |
|
|
flow_ctrl_settings, xon_char, xoff_char, param_mask);
|
| 778 |
|
|
|
| 779 |
|
|
hdr = (void *) ptr; ptr += sizeof(*hdr);
|
| 780 |
|
|
hdr->addr = __addr(s->initiator, 0);
|
| 781 |
|
|
hdr->ctrl = __ctrl(RFCOMM_UIH, 0);
|
| 782 |
|
|
hdr->len = __len8(sizeof(*mcc) + sizeof(*rpn));
|
| 783 |
|
|
|
| 784 |
|
|
mcc = (void *) ptr; ptr += sizeof(*mcc);
|
| 785 |
|
|
mcc->type = __mcc_type(cr, RFCOMM_RPN);
|
| 786 |
|
|
mcc->len = __len8(sizeof(*rpn));
|
| 787 |
|
|
|
| 788 |
|
|
rpn = (void *) ptr; ptr += sizeof(*rpn);
|
| 789 |
|
|
rpn->dlci = __addr(1, dlci);
|
| 790 |
|
|
rpn->bit_rate = bit_rate;
|
| 791 |
|
|
rpn->line_settings = __rpn_line_settings(data_bits, stop_bits, parity);
|
| 792 |
|
|
rpn->flow_ctrl = flow_ctrl_settings;
|
| 793 |
|
|
rpn->xon_char = xon_char;
|
| 794 |
|
|
rpn->xoff_char = xoff_char;
|
| 795 |
|
|
rpn->param_mask = param_mask;
|
| 796 |
|
|
|
| 797 |
|
|
*ptr = __fcs(buf); ptr++;
|
| 798 |
|
|
|
| 799 |
|
|
return rfcomm_send_frame(s, buf, ptr - buf);
|
| 800 |
|
|
}
|
| 801 |
|
|
|
| 802 |
|
|
static int rfcomm_send_rls(struct rfcomm_session *s, int cr, u8 dlci, u8 status)
|
| 803 |
|
|
{
|
| 804 |
|
|
struct rfcomm_hdr *hdr;
|
| 805 |
|
|
struct rfcomm_mcc *mcc;
|
| 806 |
|
|
struct rfcomm_rls *rls;
|
| 807 |
|
|
u8 buf[16], *ptr = buf;
|
| 808 |
|
|
|
| 809 |
|
|
BT_DBG("%p cr %d status 0x%x", s, cr, status);
|
| 810 |
|
|
|
| 811 |
|
|
hdr = (void *) ptr; ptr += sizeof(*hdr);
|
| 812 |
|
|
hdr->addr = __addr(s->initiator, 0);
|
| 813 |
|
|
hdr->ctrl = __ctrl(RFCOMM_UIH, 0);
|
| 814 |
|
|
hdr->len = __len8(sizeof(*mcc) + sizeof(*rls));
|
| 815 |
|
|
|
| 816 |
|
|
mcc = (void *) ptr; ptr += sizeof(*mcc);
|
| 817 |
|
|
mcc->type = __mcc_type(cr, RFCOMM_RLS);
|
| 818 |
|
|
mcc->len = __len8(sizeof(*rls));
|
| 819 |
|
|
|
| 820 |
|
|
rls = (void *) ptr; ptr += sizeof(*rls);
|
| 821 |
|
|
rls->dlci = __addr(1, dlci);
|
| 822 |
|
|
rls->status = status;
|
| 823 |
|
|
|
| 824 |
|
|
*ptr = __fcs(buf); ptr++;
|
| 825 |
|
|
|
| 826 |
|
|
return rfcomm_send_frame(s, buf, ptr - buf);
|
| 827 |
|
|
}
|
| 828 |
|
|
|
| 829 |
|
|
static int rfcomm_send_msc(struct rfcomm_session *s, int cr, u8 dlci, u8 v24_sig)
|
| 830 |
|
|
{
|
| 831 |
|
|
struct rfcomm_hdr *hdr;
|
| 832 |
|
|
struct rfcomm_mcc *mcc;
|
| 833 |
|
|
struct rfcomm_msc *msc;
|
| 834 |
|
|
u8 buf[16], *ptr = buf;
|
| 835 |
|
|
|
| 836 |
|
|
BT_DBG("%p cr %d v24 0x%x", s, cr, v24_sig);
|
| 837 |
|
|
|
| 838 |
|
|
hdr = (void *) ptr; ptr += sizeof(*hdr);
|
| 839 |
|
|
hdr->addr = __addr(s->initiator, 0);
|
| 840 |
|
|
hdr->ctrl = __ctrl(RFCOMM_UIH, 0);
|
| 841 |
|
|
hdr->len = __len8(sizeof(*mcc) + sizeof(*msc));
|
| 842 |
|
|
|
| 843 |
|
|
mcc = (void *) ptr; ptr += sizeof(*mcc);
|
| 844 |
|
|
mcc->type = __mcc_type(cr, RFCOMM_MSC);
|
| 845 |
|
|
mcc->len = __len8(sizeof(*msc));
|
| 846 |
|
|
|
| 847 |
|
|
msc = (void *) ptr; ptr += sizeof(*msc);
|
| 848 |
|
|
msc->dlci = __addr(1, dlci);
|
| 849 |
|
|
msc->v24_sig = v24_sig | 0x01;
|
| 850 |
|
|
|
| 851 |
|
|
*ptr = __fcs(buf); ptr++;
|
| 852 |
|
|
|
| 853 |
|
|
return rfcomm_send_frame(s, buf, ptr - buf);
|
| 854 |
|
|
}
|
| 855 |
|
|
|
| 856 |
|
|
static int rfcomm_send_fcoff(struct rfcomm_session *s, int cr)
|
| 857 |
|
|
{
|
| 858 |
|
|
struct rfcomm_hdr *hdr;
|
| 859 |
|
|
struct rfcomm_mcc *mcc;
|
| 860 |
|
|
u8 buf[16], *ptr = buf;
|
| 861 |
|
|
|
| 862 |
|
|
BT_DBG("%p cr %d", s, cr);
|
| 863 |
|
|
|
| 864 |
|
|
hdr = (void *) ptr; ptr += sizeof(*hdr);
|
| 865 |
|
|
hdr->addr = __addr(s->initiator, 0);
|
| 866 |
|
|
hdr->ctrl = __ctrl(RFCOMM_UIH, 0);
|
| 867 |
|
|
hdr->len = __len8(sizeof(*mcc));
|
| 868 |
|
|
|
| 869 |
|
|
mcc = (void *) ptr; ptr += sizeof(*mcc);
|
| 870 |
|
|
mcc->type = __mcc_type(cr, RFCOMM_FCOFF);
|
| 871 |
|
|
mcc->len = __len8(0);
|
| 872 |
|
|
|
| 873 |
|
|
*ptr = __fcs(buf); ptr++;
|
| 874 |
|
|
|
| 875 |
|
|
return rfcomm_send_frame(s, buf, ptr - buf);
|
| 876 |
|
|
}
|
| 877 |
|
|
|
| 878 |
|
|
static int rfcomm_send_fcon(struct rfcomm_session *s, int cr)
|
| 879 |
|
|
{
|
| 880 |
|
|
struct rfcomm_hdr *hdr;
|
| 881 |
|
|
struct rfcomm_mcc *mcc;
|
| 882 |
|
|
u8 buf[16], *ptr = buf;
|
| 883 |
|
|
|
| 884 |
|
|
BT_DBG("%p cr %d", s, cr);
|
| 885 |
|
|
|
| 886 |
|
|
hdr = (void *) ptr; ptr += sizeof(*hdr);
|
| 887 |
|
|
hdr->addr = __addr(s->initiator, 0);
|
| 888 |
|
|
hdr->ctrl = __ctrl(RFCOMM_UIH, 0);
|
| 889 |
|
|
hdr->len = __len8(sizeof(*mcc));
|
| 890 |
|
|
|
| 891 |
|
|
mcc = (void *) ptr; ptr += sizeof(*mcc);
|
| 892 |
|
|
mcc->type = __mcc_type(cr, RFCOMM_FCON);
|
| 893 |
|
|
mcc->len = __len8(0);
|
| 894 |
|
|
|
| 895 |
|
|
*ptr = __fcs(buf); ptr++;
|
| 896 |
|
|
|
| 897 |
|
|
return rfcomm_send_frame(s, buf, ptr - buf);
|
| 898 |
|
|
}
|
| 899 |
|
|
|
| 900 |
|
|
static int rfcomm_send_test(struct rfcomm_session *s, int cr, u8 *pattern, int len)
|
| 901 |
|
|
{
|
| 902 |
|
|
struct socket *sock = s->sock;
|
| 903 |
|
|
struct iovec iv[3];
|
| 904 |
|
|
struct msghdr msg;
|
| 905 |
|
|
unsigned char hdr[5], crc[1];
|
| 906 |
|
|
|
| 907 |
|
|
if (len > 125)
|
| 908 |
|
|
return -EINVAL;
|
| 909 |
|
|
|
| 910 |
|
|
BT_DBG("%p cr %d", s, cr);
|
| 911 |
|
|
|
| 912 |
|
|
hdr[0] = __addr(s->initiator, 0);
|
| 913 |
|
|
hdr[1] = __ctrl(RFCOMM_UIH, 0);
|
| 914 |
|
|
hdr[2] = 0x01 | ((len + 2) << 1);
|
| 915 |
|
|
hdr[3] = 0x01 | ((cr & 0x01) << 1) | (RFCOMM_TEST << 2);
|
| 916 |
|
|
hdr[4] = 0x01 | (len << 1);
|
| 917 |
|
|
|
| 918 |
|
|
crc[0] = __fcs(hdr);
|
| 919 |
|
|
|
| 920 |
|
|
iv[0].iov_base = hdr;
|
| 921 |
|
|
iv[0].iov_len = 5;
|
| 922 |
|
|
iv[1].iov_base = pattern;
|
| 923 |
|
|
iv[1].iov_len = len;
|
| 924 |
|
|
iv[2].iov_base = crc;
|
| 925 |
|
|
iv[2].iov_len = 1;
|
| 926 |
|
|
|
| 927 |
|
|
memset(&msg, 0, sizeof(msg));
|
| 928 |
|
|
msg.msg_iovlen = 3;
|
| 929 |
|
|
msg.msg_iov = iv;
|
| 930 |
|
|
return sock->ops->sendmsg(sock, &msg, 6 + len, 0);
|
| 931 |
|
|
}
|
| 932 |
|
|
|
| 933 |
|
|
static int rfcomm_send_credits(struct rfcomm_session *s, u8 addr, u8 credits)
|
| 934 |
|
|
{
|
| 935 |
|
|
struct rfcomm_hdr *hdr;
|
| 936 |
|
|
u8 buf[16], *ptr = buf;
|
| 937 |
|
|
|
| 938 |
|
|
BT_DBG("%p addr %d credits %d", s, addr, credits);
|
| 939 |
|
|
|
| 940 |
|
|
hdr = (void *) ptr; ptr += sizeof(*hdr);
|
| 941 |
|
|
hdr->addr = addr;
|
| 942 |
|
|
hdr->ctrl = __ctrl(RFCOMM_UIH, 1);
|
| 943 |
|
|
hdr->len = __len8(0);
|
| 944 |
|
|
|
| 945 |
|
|
*ptr = credits; ptr++;
|
| 946 |
|
|
|
| 947 |
|
|
*ptr = __fcs(buf); ptr++;
|
| 948 |
|
|
|
| 949 |
|
|
return rfcomm_send_frame(s, buf, ptr - buf);
|
| 950 |
|
|
}
|
| 951 |
|
|
|
| 952 |
|
|
static void rfcomm_make_uih(struct sk_buff *skb, u8 addr)
|
| 953 |
|
|
{
|
| 954 |
|
|
struct rfcomm_hdr *hdr;
|
| 955 |
|
|
int len = skb->len;
|
| 956 |
|
|
u8 *crc;
|
| 957 |
|
|
|
| 958 |
|
|
if (len > 127) {
|
| 959 |
|
|
hdr = (void *) skb_push(skb, 4);
|
| 960 |
|
|
put_unaligned(htobs(__len16(len)), (u16 *) &hdr->len);
|
| 961 |
|
|
} else {
|
| 962 |
|
|
hdr = (void *) skb_push(skb, 3);
|
| 963 |
|
|
hdr->len = __len8(len);
|
| 964 |
|
|
}
|
| 965 |
|
|
hdr->addr = addr;
|
| 966 |
|
|
hdr->ctrl = __ctrl(RFCOMM_UIH, 0);
|
| 967 |
|
|
|
| 968 |
|
|
crc = skb_put(skb, 1);
|
| 969 |
|
|
*crc = __fcs((void *) hdr);
|
| 970 |
|
|
}
|
| 971 |
|
|
|
| 972 |
|
|
/* ---- RFCOMM frame reception ---- */
|
| 973 |
|
|
static int rfcomm_recv_ua(struct rfcomm_session *s, u8 dlci)
|
| 974 |
|
|
{
|
| 975 |
|
|
BT_DBG("session %p state %ld dlci %d", s, s->state, dlci);
|
| 976 |
|
|
|
| 977 |
|
|
if (dlci) {
|
| 978 |
|
|
/* Data channel */
|
| 979 |
|
|
struct rfcomm_dlc *d = rfcomm_dlc_get(s, dlci);
|
| 980 |
|
|
if (!d) {
|
| 981 |
|
|
rfcomm_send_dm(s, dlci);
|
| 982 |
|
|
return 0;
|
| 983 |
|
|
}
|
| 984 |
|
|
|
| 985 |
|
|
switch (d->state) {
|
| 986 |
|
|
case BT_CONNECT:
|
| 987 |
|
|
rfcomm_dlc_clear_timer(d);
|
| 988 |
|
|
|
| 989 |
|
|
rfcomm_dlc_lock(d);
|
| 990 |
|
|
d->state = BT_CONNECTED;
|
| 991 |
|
|
d->state_change(d, 0);
|
| 992 |
|
|
rfcomm_dlc_unlock(d);
|
| 993 |
|
|
|
| 994 |
|
|
rfcomm_send_msc(s, 1, dlci, d->v24_sig);
|
| 995 |
|
|
break;
|
| 996 |
|
|
|
| 997 |
|
|
case BT_DISCONN:
|
| 998 |
|
|
d->state = BT_CLOSED;
|
| 999 |
|
|
__rfcomm_dlc_close(d, 0);
|
| 1000 |
|
|
break;
|
| 1001 |
|
|
}
|
| 1002 |
|
|
} else {
|
| 1003 |
|
|
/* Control channel */
|
| 1004 |
|
|
switch (s->state) {
|
| 1005 |
|
|
case BT_CONNECT:
|
| 1006 |
|
|
s->state = BT_CONNECTED;
|
| 1007 |
|
|
rfcomm_process_connect(s);
|
| 1008 |
|
|
break;
|
| 1009 |
|
|
}
|
| 1010 |
|
|
}
|
| 1011 |
|
|
return 0;
|
| 1012 |
|
|
}
|
| 1013 |
|
|
|
| 1014 |
|
|
static int rfcomm_recv_dm(struct rfcomm_session *s, u8 dlci)
|
| 1015 |
|
|
{
|
| 1016 |
|
|
int err = 0;
|
| 1017 |
|
|
|
| 1018 |
|
|
BT_DBG("session %p state %ld dlci %d", s, s->state, dlci);
|
| 1019 |
|
|
|
| 1020 |
|
|
if (dlci) {
|
| 1021 |
|
|
/* Data DLC */
|
| 1022 |
|
|
struct rfcomm_dlc *d = rfcomm_dlc_get(s, dlci);
|
| 1023 |
|
|
if (d) {
|
| 1024 |
|
|
if (d->state == BT_CONNECT || d->state == BT_CONFIG)
|
| 1025 |
|
|
err = ECONNREFUSED;
|
| 1026 |
|
|
else
|
| 1027 |
|
|
err = ECONNRESET;
|
| 1028 |
|
|
|
| 1029 |
|
|
d->state = BT_CLOSED;
|
| 1030 |
|
|
__rfcomm_dlc_close(d, err);
|
| 1031 |
|
|
}
|
| 1032 |
|
|
} else {
|
| 1033 |
|
|
if (s->state == BT_CONNECT)
|
| 1034 |
|
|
err = ECONNREFUSED;
|
| 1035 |
|
|
else
|
| 1036 |
|
|
err = ECONNRESET;
|
| 1037 |
|
|
|
| 1038 |
|
|
s->state = BT_CLOSED;
|
| 1039 |
|
|
rfcomm_session_close(s, err);
|
| 1040 |
|
|
}
|
| 1041 |
|
|
return 0;
|
| 1042 |
|
|
}
|
| 1043 |
|
|
|
| 1044 |
|
|
static int rfcomm_recv_disc(struct rfcomm_session *s, u8 dlci)
|
| 1045 |
|
|
{
|
| 1046 |
|
|
int err = 0;
|
| 1047 |
|
|
|
| 1048 |
|
|
BT_DBG("session %p state %ld dlci %d", s, s->state, dlci);
|
| 1049 |
|
|
|
| 1050 |
|
|
if (dlci) {
|
| 1051 |
|
|
struct rfcomm_dlc *d = rfcomm_dlc_get(s, dlci);
|
| 1052 |
|
|
if (d) {
|
| 1053 |
|
|
rfcomm_send_ua(s, dlci);
|
| 1054 |
|
|
|
| 1055 |
|
|
if (d->state == BT_CONNECT || d->state == BT_CONFIG)
|
| 1056 |
|
|
err = ECONNREFUSED;
|
| 1057 |
|
|
else
|
| 1058 |
|
|
err = ECONNRESET;
|
| 1059 |
|
|
|
| 1060 |
|
|
d->state = BT_CLOSED;
|
| 1061 |
|
|
__rfcomm_dlc_close(d, err);
|
| 1062 |
|
|
} else
|
| 1063 |
|
|
rfcomm_send_dm(s, dlci);
|
| 1064 |
|
|
|
| 1065 |
|
|
} else {
|
| 1066 |
|
|
rfcomm_send_ua(s, 0);
|
| 1067 |
|
|
|
| 1068 |
|
|
if (s->state == BT_CONNECT)
|
| 1069 |
|
|
err = ECONNREFUSED;
|
| 1070 |
|
|
else
|
| 1071 |
|
|
err = ECONNRESET;
|
| 1072 |
|
|
|
| 1073 |
|
|
s->state = BT_CLOSED;
|
| 1074 |
|
|
rfcomm_session_close(s, err);
|
| 1075 |
|
|
}
|
| 1076 |
|
|
|
| 1077 |
|
|
return 0;
|
| 1078 |
|
|
}
|
| 1079 |
|
|
|
| 1080 |
|
|
static int rfcomm_recv_sabm(struct rfcomm_session *s, u8 dlci)
|
| 1081 |
|
|
{
|
| 1082 |
|
|
struct rfcomm_dlc *d;
|
| 1083 |
|
|
u8 channel;
|
| 1084 |
|
|
|
| 1085 |
|
|
BT_DBG("session %p state %ld dlci %d", s, s->state, dlci);
|
| 1086 |
|
|
|
| 1087 |
|
|
if (!dlci) {
|
| 1088 |
|
|
rfcomm_send_ua(s, 0);
|
| 1089 |
|
|
|
| 1090 |
|
|
if (s->state == BT_OPEN) {
|
| 1091 |
|
|
s->state = BT_CONNECTED;
|
| 1092 |
|
|
rfcomm_process_connect(s);
|
| 1093 |
|
|
}
|
| 1094 |
|
|
return 0;
|
| 1095 |
|
|
}
|
| 1096 |
|
|
|
| 1097 |
|
|
/* Check if DLC exists */
|
| 1098 |
|
|
d = rfcomm_dlc_get(s, dlci);
|
| 1099 |
|
|
if (d) {
|
| 1100 |
|
|
if (d->state == BT_OPEN) {
|
| 1101 |
|
|
/* DLC was previously opened by PN request */
|
| 1102 |
|
|
rfcomm_send_ua(s, dlci);
|
| 1103 |
|
|
|
| 1104 |
|
|
rfcomm_dlc_lock(d);
|
| 1105 |
|
|
d->state = BT_CONNECTED;
|
| 1106 |
|
|
d->state_change(d, 0);
|
| 1107 |
|
|
rfcomm_dlc_unlock(d);
|
| 1108 |
|
|
|
| 1109 |
|
|
rfcomm_send_msc(s, 1, dlci, d->v24_sig);
|
| 1110 |
|
|
}
|
| 1111 |
|
|
return 0;
|
| 1112 |
|
|
}
|
| 1113 |
|
|
|
| 1114 |
|
|
/* Notify socket layer about incomming connection */
|
| 1115 |
|
|
channel = __srv_channel(dlci);
|
| 1116 |
|
|
if (rfcomm_connect_ind(s, channel, &d)) {
|
| 1117 |
|
|
d->dlci = dlci;
|
| 1118 |
|
|
d->addr = __addr(s->initiator, dlci);
|
| 1119 |
|
|
rfcomm_dlc_link(s, d);
|
| 1120 |
|
|
|
| 1121 |
|
|
rfcomm_send_ua(s, dlci);
|
| 1122 |
|
|
|
| 1123 |
|
|
rfcomm_dlc_lock(d);
|
| 1124 |
|
|
d->state = BT_CONNECTED;
|
| 1125 |
|
|
d->state_change(d, 0);
|
| 1126 |
|
|
rfcomm_dlc_unlock(d);
|
| 1127 |
|
|
|
| 1128 |
|
|
rfcomm_send_msc(s, 1, dlci, d->v24_sig);
|
| 1129 |
|
|
} else {
|
| 1130 |
|
|
rfcomm_send_dm(s, dlci);
|
| 1131 |
|
|
}
|
| 1132 |
|
|
|
| 1133 |
|
|
return 0;
|
| 1134 |
|
|
}
|
| 1135 |
|
|
|
| 1136 |
|
|
static int rfcomm_apply_pn(struct rfcomm_dlc *d, int cr, struct rfcomm_pn *pn)
|
| 1137 |
|
|
{
|
| 1138 |
|
|
struct rfcomm_session *s = d->session;
|
| 1139 |
|
|
|
| 1140 |
|
|
BT_DBG("dlc %p state %ld dlci %d mtu %d fc 0x%x credits %d",
|
| 1141 |
|
|
d, d->state, d->dlci, pn->mtu, pn->flow_ctrl, pn->credits);
|
| 1142 |
|
|
|
| 1143 |
|
|
if (pn->flow_ctrl == 0xf0 || pn->flow_ctrl == 0xe0) {
|
| 1144 |
|
|
d->cfc = s->cfc = RFCOMM_CFC_ENABLED;
|
| 1145 |
|
|
d->tx_credits = pn->credits;
|
| 1146 |
|
|
} else {
|
| 1147 |
|
|
d->cfc = s->cfc = RFCOMM_CFC_DISABLED;
|
| 1148 |
|
|
set_bit(RFCOMM_TX_THROTTLED, &d->flags);
|
| 1149 |
|
|
}
|
| 1150 |
|
|
|
| 1151 |
|
|
d->priority = pn->priority;
|
| 1152 |
|
|
|
| 1153 |
|
|
d->mtu = s->mtu = btohs(pn->mtu);
|
| 1154 |
|
|
|
| 1155 |
|
|
return 0;
|
| 1156 |
|
|
}
|
| 1157 |
|
|
|
| 1158 |
|
|
static int rfcomm_recv_pn(struct rfcomm_session *s, int cr, struct sk_buff *skb)
|
| 1159 |
|
|
{
|
| 1160 |
|
|
struct rfcomm_pn *pn = (void *) skb->data;
|
| 1161 |
|
|
struct rfcomm_dlc *d;
|
| 1162 |
|
|
u8 dlci = pn->dlci;
|
| 1163 |
|
|
|
| 1164 |
|
|
BT_DBG("session %p state %ld dlci %d", s, s->state, dlci);
|
| 1165 |
|
|
|
| 1166 |
|
|
if (!dlci)
|
| 1167 |
|
|
return 0;
|
| 1168 |
|
|
|
| 1169 |
|
|
d = rfcomm_dlc_get(s, dlci);
|
| 1170 |
|
|
if (d) {
|
| 1171 |
|
|
if (cr) {
|
| 1172 |
|
|
/* PN request */
|
| 1173 |
|
|
rfcomm_apply_pn(d, cr, pn);
|
| 1174 |
|
|
rfcomm_send_pn(s, 0, d);
|
| 1175 |
|
|
} else {
|
| 1176 |
|
|
/* PN response */
|
| 1177 |
|
|
switch (d->state) {
|
| 1178 |
|
|
case BT_CONFIG:
|
| 1179 |
|
|
rfcomm_apply_pn(d, cr, pn);
|
| 1180 |
|
|
|
| 1181 |
|
|
d->state = BT_CONNECT;
|
| 1182 |
|
|
rfcomm_send_sabm(s, d->dlci);
|
| 1183 |
|
|
break;
|
| 1184 |
|
|
}
|
| 1185 |
|
|
}
|
| 1186 |
|
|
} else {
|
| 1187 |
|
|
u8 channel = __srv_channel(dlci);
|
| 1188 |
|
|
|
| 1189 |
|
|
if (!cr)
|
| 1190 |
|
|
return 0;
|
| 1191 |
|
|
|
| 1192 |
|
|
/* PN request for non existing DLC.
|
| 1193 |
|
|
* Assume incomming connection. */
|
| 1194 |
|
|
if (rfcomm_connect_ind(s, channel, &d)) {
|
| 1195 |
|
|
d->dlci = dlci;
|
| 1196 |
|
|
d->addr = __addr(s->initiator, dlci);
|
| 1197 |
|
|
rfcomm_dlc_link(s, d);
|
| 1198 |
|
|
|
| 1199 |
|
|
rfcomm_apply_pn(d, cr, pn);
|
| 1200 |
|
|
|
| 1201 |
|
|
d->state = BT_OPEN;
|
| 1202 |
|
|
rfcomm_send_pn(s, 0, d);
|
| 1203 |
|
|
} else {
|
| 1204 |
|
|
rfcomm_send_dm(s, dlci);
|
| 1205 |
|
|
}
|
| 1206 |
|
|
}
|
| 1207 |
|
|
return 0;
|
| 1208 |
|
|
}
|
| 1209 |
|
|
|
| 1210 |
|
|
static int rfcomm_recv_rpn(struct rfcomm_session *s, int cr, int len, struct sk_buff *skb)
|
| 1211 |
|
|
{
|
| 1212 |
|
|
struct rfcomm_rpn *rpn = (void *) skb->data;
|
| 1213 |
|
|
u8 dlci = __get_dlci(rpn->dlci);
|
| 1214 |
|
|
|
| 1215 |
|
|
u8 bit_rate = 0;
|
| 1216 |
|
|
u8 data_bits = 0;
|
| 1217 |
|
|
u8 stop_bits = 0;
|
| 1218 |
|
|
u8 parity = 0;
|
| 1219 |
|
|
u8 flow_ctrl = 0;
|
| 1220 |
|
|
u8 xon_char = 0;
|
| 1221 |
|
|
u8 xoff_char = 0;
|
| 1222 |
|
|
u16 rpn_mask = RFCOMM_RPN_PM_ALL;
|
| 1223 |
|
|
|
| 1224 |
|
|
BT_DBG("dlci %d cr %d len 0x%x bitr 0x%x line 0x%x flow 0x%x xonc 0x%x xoffc 0x%x pm 0x%x",
|
| 1225 |
|
|
dlci, cr, len, rpn->bit_rate, rpn->line_settings, rpn->flow_ctrl,
|
| 1226 |
|
|
rpn->xon_char, rpn->xoff_char, rpn->param_mask);
|
| 1227 |
|
|
|
| 1228 |
|
|
if (!cr)
|
| 1229 |
|
|
return 0;
|
| 1230 |
|
|
|
| 1231 |
|
|
if (len == 1) {
|
| 1232 |
|
|
/* request: return default setting */
|
| 1233 |
|
|
bit_rate = RFCOMM_RPN_BR_115200;
|
| 1234 |
|
|
data_bits = RFCOMM_RPN_DATA_8;
|
| 1235 |
|
|
stop_bits = RFCOMM_RPN_STOP_1;
|
| 1236 |
|
|
parity = RFCOMM_RPN_PARITY_NONE;
|
| 1237 |
|
|
flow_ctrl = RFCOMM_RPN_FLOW_NONE;
|
| 1238 |
|
|
xon_char = RFCOMM_RPN_XON_CHAR;
|
| 1239 |
|
|
xoff_char = RFCOMM_RPN_XOFF_CHAR;
|
| 1240 |
|
|
|
| 1241 |
|
|
goto rpn_out;
|
| 1242 |
|
|
}
|
| 1243 |
|
|
/* check for sane values: ignore/accept bit_rate, 8 bits, 1 stop bit, no parity,
|
| 1244 |
|
|
no flow control lines, normal XON/XOFF chars */
|
| 1245 |
|
|
if (rpn->param_mask & RFCOMM_RPN_PM_BITRATE) {
|
| 1246 |
|
|
bit_rate = rpn->bit_rate;
|
| 1247 |
|
|
if (bit_rate != RFCOMM_RPN_BR_115200) {
|
| 1248 |
|
|
BT_DBG("RPN bit rate mismatch 0x%x", bit_rate);
|
| 1249 |
|
|
bit_rate = RFCOMM_RPN_BR_115200;
|
| 1250 |
|
|
rpn_mask ^= RFCOMM_RPN_PM_BITRATE;
|
| 1251 |
|
|
}
|
| 1252 |
|
|
}
|
| 1253 |
|
|
if (rpn->param_mask & RFCOMM_RPN_PM_DATA) {
|
| 1254 |
|
|
data_bits = __get_rpn_data_bits(rpn->line_settings);
|
| 1255 |
|
|
if (data_bits != RFCOMM_RPN_DATA_8) {
|
| 1256 |
|
|
BT_DBG("RPN data bits mismatch 0x%x", data_bits);
|
| 1257 |
|
|
data_bits = RFCOMM_RPN_DATA_8;
|
| 1258 |
|
|
rpn_mask ^= RFCOMM_RPN_PM_DATA;
|
| 1259 |
|
|
}
|
| 1260 |
|
|
}
|
| 1261 |
|
|
if (rpn->param_mask & RFCOMM_RPN_PM_STOP) {
|
| 1262 |
|
|
stop_bits = __get_rpn_stop_bits(rpn->line_settings);
|
| 1263 |
|
|
if (stop_bits != RFCOMM_RPN_STOP_1) {
|
| 1264 |
|
|
BT_DBG("RPN stop bits mismatch 0x%x", stop_bits);
|
| 1265 |
|
|
stop_bits = RFCOMM_RPN_STOP_1;
|
| 1266 |
|
|
rpn_mask ^= RFCOMM_RPN_PM_STOP;
|
| 1267 |
|
|
}
|
| 1268 |
|
|
}
|
| 1269 |
|
|
if (rpn->param_mask & RFCOMM_RPN_PM_PARITY) {
|
| 1270 |
|
|
parity = __get_rpn_parity(rpn->line_settings);
|
| 1271 |
|
|
if (parity != RFCOMM_RPN_PARITY_NONE) {
|
| 1272 |
|
|
BT_DBG("RPN parity mismatch 0x%x", parity);
|
| 1273 |
|
|
parity = RFCOMM_RPN_PARITY_NONE;
|
| 1274 |
|
|
rpn_mask ^= RFCOMM_RPN_PM_PARITY;
|
| 1275 |
|
|
}
|
| 1276 |
|
|
}
|
| 1277 |
|
|
if (rpn->param_mask & RFCOMM_RPN_PM_FLOW) {
|
| 1278 |
|
|
flow_ctrl = rpn->flow_ctrl;
|
| 1279 |
|
|
if (flow_ctrl != RFCOMM_RPN_FLOW_NONE) {
|
| 1280 |
|
|
BT_DBG("RPN flow ctrl mismatch 0x%x", flow_ctrl);
|
| 1281 |
|
|
flow_ctrl = RFCOMM_RPN_FLOW_NONE;
|
| 1282 |
|
|
rpn_mask ^= RFCOMM_RPN_PM_FLOW;
|
| 1283 |
|
|
}
|
| 1284 |
|
|
}
|
| 1285 |
|
|
if (rpn->param_mask & RFCOMM_RPN_PM_XON) {
|
| 1286 |
|
|
xon_char = rpn->xon_char;
|
| 1287 |
|
|
if (xon_char != RFCOMM_RPN_XON_CHAR) {
|
| 1288 |
|
|
BT_DBG("RPN XON char mismatch 0x%x", xon_char);
|
| 1289 |
|
|
xon_char = RFCOMM_RPN_XON_CHAR;
|
| 1290 |
|
|
rpn_mask ^= RFCOMM_RPN_PM_XON;
|
| 1291 |
|
|
}
|
| 1292 |
|
|
}
|
| 1293 |
|
|
if (rpn->param_mask & RFCOMM_RPN_PM_XOFF) {
|
| 1294 |
|
|
xoff_char = rpn->xoff_char;
|
| 1295 |
|
|
if (xoff_char != RFCOMM_RPN_XOFF_CHAR) {
|
| 1296 |
|
|
BT_DBG("RPN XOFF char mismatch 0x%x", xoff_char);
|
| 1297 |
|
|
xoff_char = RFCOMM_RPN_XOFF_CHAR;
|
| 1298 |
|
|
rpn_mask ^= RFCOMM_RPN_PM_XOFF;
|
| 1299 |
|
|
}
|
| 1300 |
|
|
}
|
| 1301 |
|
|
|
| 1302 |
|
|
rpn_out:
|
| 1303 |
|
|
rfcomm_send_rpn(s, 0, dlci,
|
| 1304 |
|
|
bit_rate, data_bits, stop_bits, parity, flow_ctrl,
|
| 1305 |
|
|
xon_char, xoff_char, rpn_mask);
|
| 1306 |
|
|
|
| 1307 |
|
|
return 0;
|
| 1308 |
|
|
}
|
| 1309 |
|
|
|
| 1310 |
|
|
static int rfcomm_recv_rls(struct rfcomm_session *s, int cr, struct sk_buff *skb)
|
| 1311 |
|
|
{
|
| 1312 |
|
|
struct rfcomm_rls *rls = (void *) skb->data;
|
| 1313 |
|
|
u8 dlci = __get_dlci(rls->dlci);
|
| 1314 |
|
|
|
| 1315 |
|
|
BT_DBG("dlci %d cr %d status 0x%x", dlci, cr, rls->status);
|
| 1316 |
|
|
|
| 1317 |
|
|
if (!cr)
|
| 1318 |
|
|
return 0;
|
| 1319 |
|
|
|
| 1320 |
|
|
/* FIXME: We should probably do something with this
|
| 1321 |
|
|
information here. But for now it's sufficient just
|
| 1322 |
|
|
to reply -- Bluetooth 1.1 says it's mandatory to
|
| 1323 |
|
|
recognise and respond to RLS */
|
| 1324 |
|
|
|
| 1325 |
|
|
rfcomm_send_rls(s, 0, dlci, rls->status);
|
| 1326 |
|
|
|
| 1327 |
|
|
return 0;
|
| 1328 |
|
|
}
|
| 1329 |
|
|
|
| 1330 |
|
|
static int rfcomm_recv_msc(struct rfcomm_session *s, int cr, struct sk_buff *skb)
|
| 1331 |
|
|
{
|
| 1332 |
|
|
struct rfcomm_msc *msc = (void *) skb->data;
|
| 1333 |
|
|
struct rfcomm_dlc *d;
|
| 1334 |
|
|
u8 dlci = __get_dlci(msc->dlci);
|
| 1335 |
|
|
|
| 1336 |
|
|
BT_DBG("dlci %d cr %d v24 0x%x", dlci, cr, msc->v24_sig);
|
| 1337 |
|
|
|
| 1338 |
|
|
d = rfcomm_dlc_get(s, dlci);
|
| 1339 |
|
|
if (!d)
|
| 1340 |
|
|
return 0;
|
| 1341 |
|
|
|
| 1342 |
|
|
if (cr) {
|
| 1343 |
|
|
if (msc->v24_sig & RFCOMM_V24_FC && !d->cfc)
|
| 1344 |
|
|
set_bit(RFCOMM_TX_THROTTLED, &d->flags);
|
| 1345 |
|
|
else
|
| 1346 |
|
|
clear_bit(RFCOMM_TX_THROTTLED, &d->flags);
|
| 1347 |
|
|
|
| 1348 |
|
|
rfcomm_dlc_lock(d);
|
| 1349 |
|
|
if (d->modem_status)
|
| 1350 |
|
|
d->modem_status(d, msc->v24_sig);
|
| 1351 |
|
|
rfcomm_dlc_unlock(d);
|
| 1352 |
|
|
|
| 1353 |
|
|
rfcomm_send_msc(s, 0, dlci, msc->v24_sig);
|
| 1354 |
|
|
|
| 1355 |
|
|
d->mscex |= RFCOMM_MSCEX_RX;
|
| 1356 |
|
|
} else
|
| 1357 |
|
|
d->mscex |= RFCOMM_MSCEX_TX;
|
| 1358 |
|
|
|
| 1359 |
|
|
return 0;
|
| 1360 |
|
|
}
|
| 1361 |
|
|
|
| 1362 |
|
|
static int rfcomm_recv_mcc(struct rfcomm_session *s, struct sk_buff *skb)
|
| 1363 |
|
|
{
|
| 1364 |
|
|
struct rfcomm_mcc *mcc = (void *) skb->data;
|
| 1365 |
|
|
u8 type, cr, len;
|
| 1366 |
|
|
|
| 1367 |
|
|
cr = __test_cr(mcc->type);
|
| 1368 |
|
|
type = __get_mcc_type(mcc->type);
|
| 1369 |
|
|
len = __get_mcc_len(mcc->len);
|
| 1370 |
|
|
|
| 1371 |
|
|
BT_DBG("%p type 0x%x cr %d", s, type, cr);
|
| 1372 |
|
|
|
| 1373 |
|
|
skb_pull(skb, 2);
|
| 1374 |
|
|
|
| 1375 |
|
|
switch (type) {
|
| 1376 |
|
|
case RFCOMM_PN:
|
| 1377 |
|
|
rfcomm_recv_pn(s, cr, skb);
|
| 1378 |
|
|
break;
|
| 1379 |
|
|
|
| 1380 |
|
|
case RFCOMM_RPN:
|
| 1381 |
|
|
rfcomm_recv_rpn(s, cr, len, skb);
|
| 1382 |
|
|
break;
|
| 1383 |
|
|
|
| 1384 |
|
|
case RFCOMM_RLS:
|
| 1385 |
|
|
rfcomm_recv_rls(s, cr, skb);
|
| 1386 |
|
|
break;
|
| 1387 |
|
|
|
| 1388 |
|
|
case RFCOMM_MSC:
|
| 1389 |
|
|
rfcomm_recv_msc(s, cr, skb);
|
| 1390 |
|
|
break;
|
| 1391 |
|
|
|
| 1392 |
|
|
case RFCOMM_FCOFF:
|
| 1393 |
|
|
if (cr) {
|
| 1394 |
|
|
set_bit(RFCOMM_TX_THROTTLED, &s->flags);
|
| 1395 |
|
|
rfcomm_send_fcoff(s, 0);
|
| 1396 |
|
|
}
|
| 1397 |
|
|
break;
|
| 1398 |
|
|
|
| 1399 |
|
|
case RFCOMM_FCON:
|
| 1400 |
|
|
if (cr) {
|
| 1401 |
|
|
clear_bit(RFCOMM_TX_THROTTLED, &s->flags);
|
| 1402 |
|
|
rfcomm_send_fcon(s, 0);
|
| 1403 |
|
|
}
|
| 1404 |
|
|
break;
|
| 1405 |
|
|
|
| 1406 |
|
|
case RFCOMM_TEST:
|
| 1407 |
|
|
if (cr)
|
| 1408 |
|
|
rfcomm_send_test(s, 0, skb->data, skb->len);
|
| 1409 |
|
|
break;
|
| 1410 |
|
|
|
| 1411 |
|
|
case RFCOMM_NSC:
|
| 1412 |
|
|
break;
|
| 1413 |
|
|
|
| 1414 |
|
|
default:
|
| 1415 |
|
|
BT_ERR("Unknown control type 0x%02x", type);
|
| 1416 |
|
|
rfcomm_send_nsc(s, cr, type);
|
| 1417 |
|
|
break;
|
| 1418 |
|
|
}
|
| 1419 |
|
|
return 0;
|
| 1420 |
|
|
}
|
| 1421 |
|
|
|
| 1422 |
|
|
static int rfcomm_recv_data(struct rfcomm_session *s, u8 dlci, int pf, struct sk_buff *skb)
|
| 1423 |
|
|
{
|
| 1424 |
|
|
struct rfcomm_dlc *d;
|
| 1425 |
|
|
|
| 1426 |
|
|
BT_DBG("session %p state %ld dlci %d pf %d", s, s->state, dlci, pf);
|
| 1427 |
|
|
|
| 1428 |
|
|
d = rfcomm_dlc_get(s, dlci);
|
| 1429 |
|
|
if (!d) {
|
| 1430 |
|
|
rfcomm_send_dm(s, dlci);
|
| 1431 |
|
|
goto drop;
|
| 1432 |
|
|
}
|
| 1433 |
|
|
|
| 1434 |
|
|
if (pf && d->cfc) {
|
| 1435 |
|
|
u8 credits = *(u8 *) skb->data; skb_pull(skb, 1);
|
| 1436 |
|
|
|
| 1437 |
|
|
d->tx_credits += credits;
|
| 1438 |
|
|
if (d->tx_credits)
|
| 1439 |
|
|
clear_bit(RFCOMM_TX_THROTTLED, &d->flags);
|
| 1440 |
|
|
}
|
| 1441 |
|
|
|
| 1442 |
|
|
if (skb->len && d->state == BT_CONNECTED) {
|
| 1443 |
|
|
rfcomm_dlc_lock(d);
|
| 1444 |
|
|
d->rx_credits--;
|
| 1445 |
|
|
d->data_ready(d, skb);
|
| 1446 |
|
|
rfcomm_dlc_unlock(d);
|
| 1447 |
|
|
return 0;
|
| 1448 |
|
|
}
|
| 1449 |
|
|
|
| 1450 |
|
|
drop:
|
| 1451 |
|
|
kfree_skb(skb);
|
| 1452 |
|
|
return 0;
|
| 1453 |
|
|
}
|
| 1454 |
|
|
|
| 1455 |
|
|
static int rfcomm_recv_frame(struct rfcomm_session *s, struct sk_buff *skb)
|
| 1456 |
|
|
{
|
| 1457 |
|
|
struct rfcomm_hdr *hdr = (void *) skb->data;
|
| 1458 |
|
|
u8 type, dlci, fcs;
|
| 1459 |
|
|
|
| 1460 |
|
|
dlci = __get_dlci(hdr->addr);
|
| 1461 |
|
|
type = __get_type(hdr->ctrl);
|
| 1462 |
|
|
|
| 1463 |
|
|
/* Trim FCS */
|
| 1464 |
|
|
skb->len--; skb->tail--;
|
| 1465 |
|
|
fcs = *(u8 *) skb->tail;
|
| 1466 |
|
|
|
| 1467 |
|
|
if (__check_fcs(skb->data, type, fcs)) {
|
| 1468 |
|
|
BT_ERR("bad checksum in packet");
|
| 1469 |
|
|
kfree_skb(skb);
|
| 1470 |
|
|
return -EILSEQ;
|
| 1471 |
|
|
}
|
| 1472 |
|
|
|
| 1473 |
|
|
if (__test_ea(hdr->len))
|
| 1474 |
|
|
skb_pull(skb, 3);
|
| 1475 |
|
|
else
|
| 1476 |
|
|
skb_pull(skb, 4);
|
| 1477 |
|
|
|
| 1478 |
|
|
switch (type) {
|
| 1479 |
|
|
case RFCOMM_SABM:
|
| 1480 |
|
|
if (__test_pf(hdr->ctrl))
|
| 1481 |
|
|
rfcomm_recv_sabm(s, dlci);
|
| 1482 |
|
|
break;
|
| 1483 |
|
|
|
| 1484 |
|
|
case RFCOMM_DISC:
|
| 1485 |
|
|
if (__test_pf(hdr->ctrl))
|
| 1486 |
|
|
rfcomm_recv_disc(s, dlci);
|
| 1487 |
|
|
break;
|
| 1488 |
|
|
|
| 1489 |
|
|
case RFCOMM_UA:
|
| 1490 |
|
|
if (__test_pf(hdr->ctrl))
|
| 1491 |
|
|
rfcomm_recv_ua(s, dlci);
|
| 1492 |
|
|
break;
|
| 1493 |
|
|
|
| 1494 |
|
|
case RFCOMM_DM:
|
| 1495 |
|
|
rfcomm_recv_dm(s, dlci);
|
| 1496 |
|
|
break;
|
| 1497 |
|
|
|
| 1498 |
|
|
case RFCOMM_UIH:
|
| 1499 |
|
|
if (dlci)
|
| 1500 |
|
|
return rfcomm_recv_data(s, dlci, __test_pf(hdr->ctrl), skb);
|
| 1501 |
|
|
|
| 1502 |
|
|
rfcomm_recv_mcc(s, skb);
|
| 1503 |
|
|
break;
|
| 1504 |
|
|
|
| 1505 |
|
|
default:
|
| 1506 |
|
|
BT_ERR("Unknown packet type 0x%02x\n", type);
|
| 1507 |
|
|
break;
|
| 1508 |
|
|
}
|
| 1509 |
|
|
kfree_skb(skb);
|
| 1510 |
|
|
return 0;
|
| 1511 |
|
|
}
|
| 1512 |
|
|
|
| 1513 |
|
|
/* ---- Connection and data processing ---- */
|
| 1514 |
|
|
|
| 1515 |
|
|
static void rfcomm_process_connect(struct rfcomm_session *s)
|
| 1516 |
|
|
{
|
| 1517 |
|
|
struct rfcomm_dlc *d;
|
| 1518 |
|
|
struct list_head *p, *n;
|
| 1519 |
|
|
|
| 1520 |
|
|
BT_DBG("session %p state %ld", s, s->state);
|
| 1521 |
|
|
|
| 1522 |
|
|
list_for_each_safe(p, n, &s->dlcs) {
|
| 1523 |
|
|
d = list_entry(p, struct rfcomm_dlc, list);
|
| 1524 |
|
|
if (d->state == BT_CONFIG) {
|
| 1525 |
|
|
d->mtu = s->mtu;
|
| 1526 |
|
|
rfcomm_send_pn(s, 1, d);
|
| 1527 |
|
|
}
|
| 1528 |
|
|
}
|
| 1529 |
|
|
}
|
| 1530 |
|
|
|
| 1531 |
|
|
/* Send data queued for the DLC.
|
| 1532 |
|
|
* Return number of frames left in the queue.
|
| 1533 |
|
|
*/
|
| 1534 |
|
|
static inline int rfcomm_process_tx(struct rfcomm_dlc *d)
|
| 1535 |
|
|
{
|
| 1536 |
|
|
struct sk_buff *skb;
|
| 1537 |
|
|
int err;
|
| 1538 |
|
|
|
| 1539 |
|
|
BT_DBG("dlc %p state %ld cfc %d rx_credits %d tx_credits %d",
|
| 1540 |
|
|
d, d->state, d->cfc, d->rx_credits, d->tx_credits);
|
| 1541 |
|
|
|
| 1542 |
|
|
/* Send pending MSC */
|
| 1543 |
|
|
if (test_and_clear_bit(RFCOMM_MSC_PENDING, &d->flags))
|
| 1544 |
|
|
rfcomm_send_msc(d->session, 1, d->dlci, d->v24_sig);
|
| 1545 |
|
|
|
| 1546 |
|
|
if (d->cfc) {
|
| 1547 |
|
|
/* CFC enabled.
|
| 1548 |
|
|
* Give them some credits */
|
| 1549 |
|
|
if (!test_bit(RFCOMM_RX_THROTTLED, &d->flags) &&
|
| 1550 |
|
|
d->rx_credits <= (d->cfc >> 2)) {
|
| 1551 |
|
|
rfcomm_send_credits(d->session, d->addr, d->cfc - d->rx_credits);
|
| 1552 |
|
|
d->rx_credits = d->cfc;
|
| 1553 |
|
|
}
|
| 1554 |
|
|
} else {
|
| 1555 |
|
|
/* CFC disabled.
|
| 1556 |
|
|
* Give ourselves some credits */
|
| 1557 |
|
|
d->tx_credits = 5;
|
| 1558 |
|
|
}
|
| 1559 |
|
|
|
| 1560 |
|
|
if (test_bit(RFCOMM_TX_THROTTLED, &d->flags))
|
| 1561 |
|
|
return skb_queue_len(&d->tx_queue);
|
| 1562 |
|
|
|
| 1563 |
|
|
while (d->tx_credits && (skb = skb_dequeue(&d->tx_queue))) {
|
| 1564 |
|
|
err = rfcomm_send_frame(d->session, skb->data, skb->len);
|
| 1565 |
|
|
if (err < 0) {
|
| 1566 |
|
|
skb_queue_head(&d->tx_queue, skb);
|
| 1567 |
|
|
break;
|
| 1568 |
|
|
}
|
| 1569 |
|
|
kfree_skb(skb);
|
| 1570 |
|
|
d->tx_credits--;
|
| 1571 |
|
|
}
|
| 1572 |
|
|
|
| 1573 |
|
|
if (d->cfc && !d->tx_credits) {
|
| 1574 |
|
|
/* We're out of TX credits.
|
| 1575 |
|
|
* Set TX_THROTTLED flag to avoid unnesary wakeups by dlc_send. */
|
| 1576 |
|
|
set_bit(RFCOMM_TX_THROTTLED, &d->flags);
|
| 1577 |
|
|
}
|
| 1578 |
|
|
|
| 1579 |
|
|
return skb_queue_len(&d->tx_queue);
|
| 1580 |
|
|
}
|
| 1581 |
|
|
|
| 1582 |
|
|
static inline void rfcomm_process_dlcs(struct rfcomm_session *s)
|
| 1583 |
|
|
{
|
| 1584 |
|
|
struct rfcomm_dlc *d;
|
| 1585 |
|
|
struct list_head *p, *n;
|
| 1586 |
|
|
|
| 1587 |
|
|
BT_DBG("session %p state %ld", s, s->state);
|
| 1588 |
|
|
|
| 1589 |
|
|
list_for_each_safe(p, n, &s->dlcs) {
|
| 1590 |
|
|
d = list_entry(p, struct rfcomm_dlc, list);
|
| 1591 |
|
|
if (test_bit(RFCOMM_TIMED_OUT, &d->flags)) {
|
| 1592 |
|
|
__rfcomm_dlc_close(d, ETIMEDOUT);
|
| 1593 |
|
|
continue;
|
| 1594 |
|
|
}
|
| 1595 |
|
|
|
| 1596 |
|
|
if (test_bit(RFCOMM_TX_THROTTLED, &s->flags))
|
| 1597 |
|
|
continue;
|
| 1598 |
|
|
|
| 1599 |
|
|
if ((d->state == BT_CONNECTED || d->state == BT_DISCONN) &&
|
| 1600 |
|
|
d->mscex == RFCOMM_MSCEX_OK)
|
| 1601 |
|
|
rfcomm_process_tx(d);
|
| 1602 |
|
|
}
|
| 1603 |
|
|
}
|
| 1604 |
|
|
|
| 1605 |
|
|
static inline void rfcomm_process_rx(struct rfcomm_session *s)
|
| 1606 |
|
|
{
|
| 1607 |
|
|
struct socket *sock = s->sock;
|
| 1608 |
|
|
struct sock *sk = sock->sk;
|
| 1609 |
|
|
struct sk_buff *skb;
|
| 1610 |
|
|
|
| 1611 |
|
|
BT_DBG("session %p state %ld qlen %d", s, s->state, skb_queue_len(&sk->receive_queue));
|
| 1612 |
|
|
|
| 1613 |
|
|
/* Get data directly from socket receive queue without copying it. */
|
| 1614 |
|
|
while ((skb = skb_dequeue(&sk->receive_queue))) {
|
| 1615 |
|
|
skb_orphan(skb);
|
| 1616 |
|
|
rfcomm_recv_frame(s, skb);
|
| 1617 |
|
|
}
|
| 1618 |
|
|
|
| 1619 |
|
|
if (sk->state == BT_CLOSED) {
|
| 1620 |
|
|
if (!s->initiator)
|
| 1621 |
|
|
rfcomm_session_put(s);
|
| 1622 |
|
|
|
| 1623 |
|
|
rfcomm_session_close(s, sk->err);
|
| 1624 |
|
|
}
|
| 1625 |
|
|
}
|
| 1626 |
|
|
|
| 1627 |
|
|
static inline void rfcomm_accept_connection(struct rfcomm_session *s)
|
| 1628 |
|
|
{
|
| 1629 |
|
|
struct socket *sock = s->sock, *nsock;
|
| 1630 |
|
|
int err;
|
| 1631 |
|
|
|
| 1632 |
|
|
/* Fast check for a new connection.
|
| 1633 |
|
|
* Avoids unnesesary socket allocations. */
|
| 1634 |
|
|
if (list_empty(&bluez_pi(sock->sk)->accept_q))
|
| 1635 |
|
|
return;
|
| 1636 |
|
|
|
| 1637 |
|
|
BT_DBG("session %p", s);
|
| 1638 |
|
|
|
| 1639 |
|
|
nsock = sock_alloc();
|
| 1640 |
|
|
if (!nsock)
|
| 1641 |
|
|
return;
|
| 1642 |
|
|
|
| 1643 |
|
|
nsock->type = sock->type;
|
| 1644 |
|
|
nsock->ops = sock->ops;
|
| 1645 |
|
|
|
| 1646 |
|
|
err = sock->ops->accept(sock, nsock, O_NONBLOCK);
|
| 1647 |
|
|
if (err < 0) {
|
| 1648 |
|
|
sock_release(nsock);
|
| 1649 |
|
|
return;
|
| 1650 |
|
|
}
|
| 1651 |
|
|
|
| 1652 |
|
|
/* Set our callbacks */
|
| 1653 |
|
|
nsock->sk->data_ready = rfcomm_l2data_ready;
|
| 1654 |
|
|
nsock->sk->state_change = rfcomm_l2state_change;
|
| 1655 |
|
|
|
| 1656 |
|
|
s = rfcomm_session_add(nsock, BT_OPEN);
|
| 1657 |
|
|
if (s) {
|
| 1658 |
|
|
rfcomm_session_hold(s);
|
| 1659 |
|
|
rfcomm_schedule(RFCOMM_SCHED_RX);
|
| 1660 |
|
|
} else
|
| 1661 |
|
|
sock_release(nsock);
|
| 1662 |
|
|
}
|
| 1663 |
|
|
|
| 1664 |
|
|
static inline void rfcomm_check_connection(struct rfcomm_session *s)
|
| 1665 |
|
|
{
|
| 1666 |
|
|
struct sock *sk = s->sock->sk;
|
| 1667 |
|
|
|
| 1668 |
|
|
BT_DBG("%p state %ld", s, s->state);
|
| 1669 |
|
|
|
| 1670 |
|
|
switch(sk->state) {
|
| 1671 |
|
|
case BT_CONNECTED:
|
| 1672 |
|
|
s->state = BT_CONNECT;
|
| 1673 |
|
|
|
| 1674 |
|
|
/* We can adjust MTU on outgoing sessions.
|
| 1675 |
|
|
* L2CAP MTU minus UIH header and FCS. */
|
| 1676 |
|
|
s->mtu = min(l2cap_pi(sk)->omtu, l2cap_pi(sk)->imtu) - 5;
|
| 1677 |
|
|
|
| 1678 |
|
|
rfcomm_send_sabm(s, 0);
|
| 1679 |
|
|
break;
|
| 1680 |
|
|
|
| 1681 |
|
|
case BT_CLOSED:
|
| 1682 |
|
|
s->state = BT_CLOSED;
|
| 1683 |
|
|
rfcomm_session_close(s, sk->err);
|
| 1684 |
|
|
break;
|
| 1685 |
|
|
}
|
| 1686 |
|
|
}
|
| 1687 |
|
|
|
| 1688 |
|
|
static inline void rfcomm_process_sessions(void)
|
| 1689 |
|
|
{
|
| 1690 |
|
|
struct list_head *p, *n;
|
| 1691 |
|
|
|
| 1692 |
|
|
rfcomm_lock();
|
| 1693 |
|
|
|
| 1694 |
|
|
list_for_each_safe(p, n, &session_list) {
|
| 1695 |
|
|
struct rfcomm_session *s;
|
| 1696 |
|
|
s = list_entry(p, struct rfcomm_session, list);
|
| 1697 |
|
|
|
| 1698 |
|
|
if (s->state == BT_LISTEN) {
|
| 1699 |
|
|
rfcomm_accept_connection(s);
|
| 1700 |
|
|
continue;
|
| 1701 |
|
|
}
|
| 1702 |
|
|
|
| 1703 |
|
|
rfcomm_session_hold(s);
|
| 1704 |
|
|
|
| 1705 |
|
|
switch (s->state) {
|
| 1706 |
|
|
case BT_BOUND:
|
| 1707 |
|
|
rfcomm_check_connection(s);
|
| 1708 |
|
|
break;
|
| 1709 |
|
|
|
| 1710 |
|
|
default:
|
| 1711 |
|
|
rfcomm_process_rx(s);
|
| 1712 |
|
|
break;
|
| 1713 |
|
|
}
|
| 1714 |
|
|
|
| 1715 |
|
|
rfcomm_process_dlcs(s);
|
| 1716 |
|
|
|
| 1717 |
|
|
rfcomm_session_put(s);
|
| 1718 |
|
|
}
|
| 1719 |
|
|
|
| 1720 |
|
|
rfcomm_unlock();
|
| 1721 |
|
|
}
|
| 1722 |
|
|
|
| 1723 |
|
|
static void rfcomm_worker(void)
|
| 1724 |
|
|
{
|
| 1725 |
|
|
BT_DBG("");
|
| 1726 |
|
|
|
| 1727 |
|
|
daemonize(); reparent_to_init();
|
| 1728 |
|
|
set_fs(KERNEL_DS);
|
| 1729 |
|
|
|
| 1730 |
|
|
while (!atomic_read(&terminate)) {
|
| 1731 |
|
|
BT_DBG("worker loop event 0x%lx", rfcomm_event);
|
| 1732 |
|
|
|
| 1733 |
|
|
if (!test_bit(RFCOMM_SCHED_WAKEUP, &rfcomm_event)) {
|
| 1734 |
|
|
/* No pending events. Let's sleep.
|
| 1735 |
|
|
* Incomming connections and data will wake us up. */
|
| 1736 |
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
| 1737 |
|
|
schedule();
|
| 1738 |
|
|
}
|
| 1739 |
|
|
|
| 1740 |
|
|
/* Process stuff */
|
| 1741 |
|
|
clear_bit(RFCOMM_SCHED_WAKEUP, &rfcomm_event);
|
| 1742 |
|
|
rfcomm_process_sessions();
|
| 1743 |
|
|
}
|
| 1744 |
|
|
set_current_state(TASK_RUNNING);
|
| 1745 |
|
|
return;
|
| 1746 |
|
|
}
|
| 1747 |
|
|
|
| 1748 |
|
|
static int rfcomm_add_listener(bdaddr_t *ba)
|
| 1749 |
|
|
{
|
| 1750 |
|
|
struct sockaddr_l2 addr;
|
| 1751 |
|
|
struct l2cap_options opts;
|
| 1752 |
|
|
struct socket *sock;
|
| 1753 |
|
|
struct rfcomm_session *s;
|
| 1754 |
|
|
int size, err = 0;
|
| 1755 |
|
|
|
| 1756 |
|
|
/* Create socket */
|
| 1757 |
|
|
err = rfcomm_l2sock_create(&sock);
|
| 1758 |
|
|
if (err < 0) {
|
| 1759 |
|
|
BT_ERR("Create socket failed %d", err);
|
| 1760 |
|
|
return err;
|
| 1761 |
|
|
}
|
| 1762 |
|
|
|
| 1763 |
|
|
/* Bind socket */
|
| 1764 |
|
|
bacpy(&addr.l2_bdaddr, ba);
|
| 1765 |
|
|
addr.l2_family = AF_BLUETOOTH;
|
| 1766 |
|
|
addr.l2_psm = htobs(RFCOMM_PSM);
|
| 1767 |
|
|
err = sock->ops->bind(sock, (struct sockaddr *) &addr, sizeof(addr));
|
| 1768 |
|
|
if (err < 0) {
|
| 1769 |
|
|
BT_ERR("Bind failed %d", err);
|
| 1770 |
|
|
goto failed;
|
| 1771 |
|
|
}
|
| 1772 |
|
|
|
| 1773 |
|
|
/* Set L2CAP options */
|
| 1774 |
|
|
size = sizeof(opts);
|
| 1775 |
|
|
sock->ops->getsockopt(sock, SOL_L2CAP, L2CAP_OPTIONS, (void *)&opts, &size);
|
| 1776 |
|
|
|
| 1777 |
|
|
opts.imtu = RFCOMM_MAX_L2CAP_MTU;
|
| 1778 |
|
|
sock->ops->setsockopt(sock, SOL_L2CAP, L2CAP_OPTIONS, (void *)&opts, size);
|
| 1779 |
|
|
|
| 1780 |
|
|
/* Start listening on the socket */
|
| 1781 |
|
|
err = sock->ops->listen(sock, 10);
|
| 1782 |
|
|
if (err) {
|
| 1783 |
|
|
BT_ERR("Listen failed %d", err);
|
| 1784 |
|
|
goto failed;
|
| 1785 |
|
|
}
|
| 1786 |
|
|
|
| 1787 |
|
|
/* Add listening session */
|
| 1788 |
|
|
s = rfcomm_session_add(sock, BT_LISTEN);
|
| 1789 |
|
|
if (!s)
|
| 1790 |
|
|
goto failed;
|
| 1791 |
|
|
|
| 1792 |
|
|
rfcomm_session_hold(s);
|
| 1793 |
|
|
return 0;
|
| 1794 |
|
|
failed:
|
| 1795 |
|
|
sock_release(sock);
|
| 1796 |
|
|
return err;
|
| 1797 |
|
|
}
|
| 1798 |
|
|
|
| 1799 |
|
|
static void rfcomm_kill_listener(void)
|
| 1800 |
|
|
{
|
| 1801 |
|
|
struct rfcomm_session *s;
|
| 1802 |
|
|
struct list_head *p, *n;
|
| 1803 |
|
|
|
| 1804 |
|
|
BT_DBG("");
|
| 1805 |
|
|
|
| 1806 |
|
|
list_for_each_safe(p, n, &session_list) {
|
| 1807 |
|
|
s = list_entry(p, struct rfcomm_session, list);
|
| 1808 |
|
|
rfcomm_session_del(s);
|
| 1809 |
|
|
}
|
| 1810 |
|
|
}
|
| 1811 |
|
|
|
| 1812 |
|
|
static int rfcomm_run(void *unused)
|
| 1813 |
|
|
{
|
| 1814 |
|
|
rfcomm_thread = current;
|
| 1815 |
|
|
|
| 1816 |
|
|
atomic_inc(&running);
|
| 1817 |
|
|
|
| 1818 |
|
|
daemonize(); reparent_to_init();
|
| 1819 |
|
|
|
| 1820 |
|
|
sigfillset(¤t->blocked);
|
| 1821 |
|
|
set_fs(KERNEL_DS);
|
| 1822 |
|
|
|
| 1823 |
|
|
sprintf(current->comm, "krfcommd");
|
| 1824 |
|
|
|
| 1825 |
|
|
BT_DBG("");
|
| 1826 |
|
|
|
| 1827 |
|
|
rfcomm_add_listener(BDADDR_ANY);
|
| 1828 |
|
|
|
| 1829 |
|
|
rfcomm_worker();
|
| 1830 |
|
|
|
| 1831 |
|
|
rfcomm_kill_listener();
|
| 1832 |
|
|
|
| 1833 |
|
|
atomic_dec(&running);
|
| 1834 |
|
|
return 0;
|
| 1835 |
|
|
}
|
| 1836 |
|
|
|
| 1837 |
|
|
/* ---- Proc fs support ---- */
|
| 1838 |
|
|
static int rfcomm_dlc_dump(char *buf)
|
| 1839 |
|
|
{
|
| 1840 |
|
|
struct rfcomm_session *s;
|
| 1841 |
|
|
struct sock *sk;
|
| 1842 |
|
|
struct list_head *p, *pp;
|
| 1843 |
|
|
char *ptr = buf;
|
| 1844 |
|
|
|
| 1845 |
|
|
rfcomm_lock();
|
| 1846 |
|
|
|
| 1847 |
|
|
list_for_each(p, &session_list) {
|
| 1848 |
|
|
s = list_entry(p, struct rfcomm_session, list);
|
| 1849 |
|
|
sk = s->sock->sk;
|
| 1850 |
|
|
|
| 1851 |
|
|
list_for_each(pp, &s->dlcs) {
|
| 1852 |
|
|
struct rfcomm_dlc *d;
|
| 1853 |
|
|
d = list_entry(pp, struct rfcomm_dlc, list);
|
| 1854 |
|
|
|
| 1855 |
|
|
ptr += sprintf(ptr, "dlc %s %s %ld %d %d %d %d\n",
|
| 1856 |
|
|
batostr(&bluez_pi(sk)->src), batostr(&bluez_pi(sk)->dst),
|
| 1857 |
|
|
d->state, d->dlci, d->mtu, d->rx_credits, d->tx_credits);
|
| 1858 |
|
|
}
|
| 1859 |
|
|
}
|
| 1860 |
|
|
|
| 1861 |
|
|
rfcomm_unlock();
|
| 1862 |
|
|
|
| 1863 |
|
|
return ptr - buf;
|
| 1864 |
|
|
}
|
| 1865 |
|
|
|
| 1866 |
|
|
extern int rfcomm_sock_dump(char *buf);
|
| 1867 |
|
|
|
| 1868 |
|
|
static int rfcomm_read_proc(char *buf, char **start, off_t offset, int count, int *eof, void *priv)
|
| 1869 |
|
|
{
|
| 1870 |
|
|
char *ptr = buf;
|
| 1871 |
|
|
int len;
|
| 1872 |
|
|
|
| 1873 |
|
|
BT_DBG("count %d, offset %ld", count, offset);
|
| 1874 |
|
|
|
| 1875 |
|
|
ptr += rfcomm_dlc_dump(ptr);
|
| 1876 |
|
|
ptr += rfcomm_sock_dump(ptr);
|
| 1877 |
|
|
len = ptr - buf;
|
| 1878 |
|
|
|
| 1879 |
|
|
if (len <= count + offset)
|
| 1880 |
|
|
*eof = 1;
|
| 1881 |
|
|
|
| 1882 |
|
|
*start = buf + offset;
|
| 1883 |
|
|
len -= offset;
|
| 1884 |
|
|
|
| 1885 |
|
|
if (len > count)
|
| 1886 |
|
|
len = count;
|
| 1887 |
|
|
if (len < 0)
|
| 1888 |
|
|
len = 0;
|
| 1889 |
|
|
|
| 1890 |
|
|
return len;
|
| 1891 |
|
|
}
|
| 1892 |
|
|
|
| 1893 |
|
|
/* ---- Initialization ---- */
|
| 1894 |
|
|
int __init rfcomm_init(void)
|
| 1895 |
|
|
{
|
| 1896 |
|
|
l2cap_load();
|
| 1897 |
|
|
|
| 1898 |
|
|
kernel_thread(rfcomm_run, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND);
|
| 1899 |
|
|
|
| 1900 |
|
|
rfcomm_init_sockets();
|
| 1901 |
|
|
|
| 1902 |
|
|
#ifdef CONFIG_BLUEZ_RFCOMM_TTY
|
| 1903 |
|
|
rfcomm_init_ttys();
|
| 1904 |
|
|
#endif
|
| 1905 |
|
|
|
| 1906 |
|
|
create_proc_read_entry("bluetooth/rfcomm", 0, 0, rfcomm_read_proc, NULL);
|
| 1907 |
|
|
|
| 1908 |
|
|
BT_INFO("BlueZ RFCOMM ver %s", VERSION);
|
| 1909 |
|
|
BT_INFO("Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com>");
|
| 1910 |
|
|
BT_INFO("Copyright (C) 2002 Marcel Holtmann <marcel@holtmann.org>");
|
| 1911 |
|
|
return 0;
|
| 1912 |
|
|
}
|
| 1913 |
|
|
|
| 1914 |
|
|
void rfcomm_cleanup(void)
|
| 1915 |
|
|
{
|
| 1916 |
|
|
/* Terminate working thread.
|
| 1917 |
|
|
* ie. Set terminate flag and wake it up */
|
| 1918 |
|
|
atomic_inc(&terminate);
|
| 1919 |
|
|
rfcomm_schedule(RFCOMM_SCHED_STATE);
|
| 1920 |
|
|
|
| 1921 |
|
|
/* Wait until thread is running */
|
| 1922 |
|
|
while (atomic_read(&running))
|
| 1923 |
|
|
schedule();
|
| 1924 |
|
|
|
| 1925 |
|
|
remove_proc_entry("bluetooth/rfcomm", NULL);
|
| 1926 |
|
|
|
| 1927 |
|
|
#ifdef CONFIG_BLUEZ_RFCOMM_TTY
|
| 1928 |
|
|
rfcomm_cleanup_ttys();
|
| 1929 |
|
|
#endif
|
| 1930 |
|
|
|
| 1931 |
|
|
rfcomm_cleanup_sockets();
|
| 1932 |
|
|
return;
|
| 1933 |
|
|
}
|
| 1934 |
|
|
|
| 1935 |
|
|
module_init(rfcomm_init);
|
| 1936 |
|
|
module_exit(rfcomm_cleanup);
|
| 1937 |
|
|
|
| 1938 |
|
|
MODULE_AUTHOR("Maxim Krasnyansky <maxk@qualcomm.com>, Marcel Holtmann <marcel@holtmann.org>");
|
| 1939 |
|
|
MODULE_DESCRIPTION("BlueZ RFCOMM ver " VERSION);
|
| 1940 |
|
|
MODULE_LICENSE("GPL");
|
