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