/* $NetBSD: client.c,v 1.2 2008/12/06 20:01:14 plunky Exp $ */ /*- * SPDX-License-Identifier: BSD-2-Clause * * 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 __RCSID("$NetBSD: client.c,v 1.2 2008/12/06 20:01:14 plunky Exp $"); #define L2CAP_SOCKET_CHECKED #include #include #include #include #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); }