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/* $NetBSD: client.c,v 1.2 2008/12/06 20:01:14 plunky Exp $ */
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2008 Iain Hibbert
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* $FreeBSD$ */
#include <sys/cdefs.h>
__RCSID("$NetBSD: client.c,v 1.2 2008/12/06 20:01:14 plunky Exp $");
#define L2CAP_SOCKET_CHECKED
#include <bluetooth.h>
#include <errno.h>
#include <sdp.h>
#include <unistd.h>
#include "btpand.h"
#include "bnep.h"
#include "sdp.h"
static void client_query(void);
void
client_init(void)
{
struct sockaddr_l2cap sa;
channel_t *chan;
socklen_t len;
int fd, n;
uint16_t mru, mtu;
if (bdaddr_any(&remote_bdaddr))
return;
if (service_name)
client_query();
fd = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BLUETOOTH_PROTO_L2CAP);
if (fd == -1) {
log_err("Could not open L2CAP socket: %m");
exit(EXIT_FAILURE);
}
memset(&sa, 0, sizeof(sa));
sa.l2cap_family = AF_BLUETOOTH;
sa.l2cap_len = sizeof(sa);
sa.l2cap_bdaddr_type = BDADDR_BREDR;
sa.l2cap_cid = 0;
bdaddr_copy(&sa.l2cap_bdaddr, &local_bdaddr);
if (bind(fd, (struct sockaddr *)&sa, sizeof(sa)) == -1) {
log_err("Could not bind client socket: %m");
exit(EXIT_FAILURE);
}
mru = BNEP_MTU_MIN;
if (setsockopt(fd, SOL_L2CAP, SO_L2CAP_IMTU, &mru, sizeof(mru)) == -1) {
log_err("Could not set L2CAP IMTU (%d): %m", mru);
exit(EXIT_FAILURE);
}
log_info("Opening connection to service 0x%4.4x at %s",
service_class, bt_ntoa(&remote_bdaddr, NULL));
sa.l2cap_psm = htole16(l2cap_psm);
bdaddr_copy(&sa.l2cap_bdaddr, &remote_bdaddr);
if (connect(fd, (struct sockaddr *)&sa, sizeof(sa)) == -1) {
log_err("Could not connect: %m");
exit(EXIT_FAILURE);
}
len = sizeof(mru);
if (getsockopt(fd, SOL_L2CAP, SO_L2CAP_IMTU, &mru, &len) == -1) {
log_err("Could not get IMTU: %m");
exit(EXIT_FAILURE);
}
if (mru < BNEP_MTU_MIN) {
log_err("L2CAP IMTU too small (%d)", mru);
exit(EXIT_FAILURE);
}
len = sizeof(n);
if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &n, &len) == -1) {
log_err("Could not read SO_RCVBUF");
exit(EXIT_FAILURE);
}
if (n < (mru * 10)) {
n = mru * 10;
if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &n, sizeof(n)) == -1)
log_info("Could not increase SO_RCVBUF (from %d)", n);
}
len = sizeof(mtu);
if (getsockopt(fd, SOL_L2CAP, SO_L2CAP_OMTU, &mtu, &len) == -1) {
log_err("Could not get L2CAP OMTU: %m");
exit(EXIT_FAILURE);
}
if (mtu < BNEP_MTU_MIN) {
log_err("L2CAP OMTU too small (%d)", mtu);
exit(EXIT_FAILURE);
}
len = sizeof(n);
if (getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &n, &len) == -1) {
log_err("Could not get socket send buffer size: %m");
close(fd);
return;
}
if (n < (mtu * 2)) {
n = mtu * 2;
if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &n, sizeof(n)) == -1) {
log_err("Could not set socket send buffer size (%d): %m", n);
close(fd);
return;
}
}
n = mtu;
if (setsockopt(fd, SOL_SOCKET, SO_SNDLOWAT, &n, sizeof(n)) == -1) {
log_err("Could not set socket low water mark (%d): %m", n);
close(fd);
return;
}
chan = channel_alloc();
if (chan == NULL)
exit(EXIT_FAILURE);
chan->send = bnep_send;
chan->recv = bnep_recv;
chan->mru = mru;
chan->mtu = mtu;
b2eaddr(chan->raddr, &remote_bdaddr);
b2eaddr(chan->laddr, &local_bdaddr);
chan->state = CHANNEL_WAIT_CONNECT_RSP;
channel_timeout(chan, 10);
if (!channel_open(chan, fd))
exit(EXIT_FAILURE);
bnep_send_control(chan, BNEP_SETUP_CONNECTION_REQUEST,
2, service_class, SDP_SERVICE_CLASS_PANU);
}
static void
client_query(void)
{
uint8_t buffer[512];
sdp_attr_t attr;
uint32_t range;
void *ss;
int rv;
uint8_t *seq0, *seq1;
attr.flags = SDP_ATTR_INVALID;
attr.attr = 0;
attr.vlen = sizeof(buffer);
attr.value = buffer;
range = SDP_ATTR_RANGE(SDP_ATTR_PROTOCOL_DESCRIPTOR_LIST,
SDP_ATTR_PROTOCOL_DESCRIPTOR_LIST);
ss = sdp_open(&local_bdaddr, &remote_bdaddr);
if (ss == NULL || (errno = sdp_error(ss)) != 0) {
log_err("%s: %m", service_name);
exit(EXIT_FAILURE);
}
log_info("Searching for %s service at %s",
service_name, bt_ntoa(&remote_bdaddr, NULL));
rv = sdp_search(ss, 1, &service_class, 1, &range, 1, &attr);
if (rv != 0) {
log_err("%s: %s", service_name, strerror(sdp_error(ss)));
exit(EXIT_FAILURE);
}
sdp_close(ss);
if (attr.flags != SDP_ATTR_OK
|| attr.attr != SDP_ATTR_PROTOCOL_DESCRIPTOR_LIST) {
log_err("%s service not found", service_name);
exit(EXIT_FAILURE);
}
/*
* we expect the following protocol descriptor list
*
* seq len
* seq len
* uuid value == L2CAP
* uint16 value16 => PSM
* seq len
* uuid value == BNEP
*/
if (_sdp_get_seq(&attr.value, attr.value + attr.vlen, &seq0)
&& _sdp_get_seq(&seq0, attr.value, &seq1)
&& _sdp_match_uuid16(&seq1, seq0, SDP_UUID_PROTOCOL_L2CAP)
&& _sdp_get_uint16(&seq1, seq0, &l2cap_psm)
&& _sdp_get_seq(&seq0, attr.value, &seq1)
&& _sdp_match_uuid16(&seq1, seq0, SDP_UUID_PROTOCOL_BNEP)) {
log_info("Found PSM %d for service %s", l2cap_psm, service_name);
return;
}
log_err("%s query failed", service_name);
exit(EXIT_FAILURE);
}
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