1/* $NetBSD: client.c,v 1.2 2008/12/06 20:01:14 plunky Exp $ */ 2 3/*- 4 * Copyright (c) 2008 Iain Hibbert 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28/* $FreeBSD: releng/11.0/usr.sbin/bluetooth/btpand/client.c 281210 2015-04-07 16:48:23Z takawata $ */ 29 30#include <sys/cdefs.h> 31__RCSID("$NetBSD: client.c,v 1.2 2008/12/06 20:01:14 plunky Exp $"); 32 33#define L2CAP_SOCKET_CHECKED 34#include <bluetooth.h> 35#include <errno.h> 36#include <sdp.h> 37#include <unistd.h> 38 39#include "btpand.h" 40#include "bnep.h" 41#include "sdp.h" 42 43static void client_query(void); 44 45void 46client_init(void) 47{ 48 struct sockaddr_l2cap sa; 49 channel_t *chan; 50 socklen_t len; 51 int fd, n; 52 uint16_t mru, mtu; 53 54 if (bdaddr_any(&remote_bdaddr)) 55 return; 56 57 if (service_name) 58 client_query(); 59 60 fd = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BLUETOOTH_PROTO_L2CAP); 61 if (fd == -1) { 62 log_err("Could not open L2CAP socket: %m"); 63 exit(EXIT_FAILURE); 64 } 65 66 memset(&sa, 0, sizeof(sa)); 67 sa.l2cap_family = AF_BLUETOOTH; 68 sa.l2cap_len = sizeof(sa); 69 sa.l2cap_bdaddr_type = BDADDR_BREDR; 70 sa.l2cap_cid = 0; 71 72 bdaddr_copy(&sa.l2cap_bdaddr, &local_bdaddr); 73 if (bind(fd, (struct sockaddr *)&sa, sizeof(sa)) == -1) { 74 log_err("Could not bind client socket: %m"); 75 exit(EXIT_FAILURE); 76 } 77 78 mru = BNEP_MTU_MIN; 79 if (setsockopt(fd, SOL_L2CAP, SO_L2CAP_IMTU, &mru, sizeof(mru)) == -1) { 80 log_err("Could not set L2CAP IMTU (%d): %m", mru); 81 exit(EXIT_FAILURE); 82 } 83 84 log_info("Opening connection to service 0x%4.4x at %s", 85 service_class, bt_ntoa(&remote_bdaddr, NULL)); 86 87 sa.l2cap_psm = htole16(l2cap_psm); 88 bdaddr_copy(&sa.l2cap_bdaddr, &remote_bdaddr); 89 if (connect(fd, (struct sockaddr *)&sa, sizeof(sa)) == -1) { 90 log_err("Could not connect: %m"); 91 exit(EXIT_FAILURE); 92 } 93 94 len = sizeof(mru); 95 if (getsockopt(fd, SOL_L2CAP, SO_L2CAP_IMTU, &mru, &len) == -1) { 96 log_err("Could not get IMTU: %m"); 97 exit(EXIT_FAILURE); 98 } 99 if (mru < BNEP_MTU_MIN) { 100 log_err("L2CAP IMTU too small (%d)", mru); 101 exit(EXIT_FAILURE); 102 } 103 104 len = sizeof(n); 105 if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &n, &len) == -1) { 106 log_err("Could not read SO_RCVBUF"); 107 exit(EXIT_FAILURE); 108 } 109 if (n < (mru * 10)) { 110 n = mru * 10; 111 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &n, sizeof(n)) == -1) 112 log_info("Could not increase SO_RCVBUF (from %d)", n); 113 } 114 115 len = sizeof(mtu); 116 if (getsockopt(fd, SOL_L2CAP, SO_L2CAP_OMTU, &mtu, &len) == -1) { 117 log_err("Could not get L2CAP OMTU: %m"); 118 exit(EXIT_FAILURE); 119 } 120 if (mtu < BNEP_MTU_MIN) { 121 log_err("L2CAP OMTU too small (%d)", mtu); 122 exit(EXIT_FAILURE); 123 } 124 125 len = sizeof(n); 126 if (getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &n, &len) == -1) { 127 log_err("Could not get socket send buffer size: %m"); 128 close(fd); 129 return; 130 } 131 if (n < (mtu * 2)) { 132 n = mtu * 2; 133 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &n, sizeof(n)) == -1) { 134 log_err("Could not set socket send buffer size (%d): %m", n); 135 close(fd); 136 return; 137 } 138 } 139 n = mtu; 140 if (setsockopt(fd, SOL_SOCKET, SO_SNDLOWAT, &n, sizeof(n)) == -1) { 141 log_err("Could not set socket low water mark (%d): %m", n); 142 close(fd); 143 return; 144 } 145 146 chan = channel_alloc(); 147 if (chan == NULL) 148 exit(EXIT_FAILURE); 149 150 chan->send = bnep_send; 151 chan->recv = bnep_recv; 152 chan->mru = mru; 153 chan->mtu = mtu; 154 b2eaddr(chan->raddr, &remote_bdaddr); 155 b2eaddr(chan->laddr, &local_bdaddr); 156 chan->state = CHANNEL_WAIT_CONNECT_RSP; 157 channel_timeout(chan, 10); 158 if (!channel_open(chan, fd)) 159 exit(EXIT_FAILURE); 160 161 bnep_send_control(chan, BNEP_SETUP_CONNECTION_REQUEST, 162 2, service_class, SDP_SERVICE_CLASS_PANU); 163} 164 165static void 166client_query(void) 167{ 168 uint8_t buffer[512]; 169 sdp_attr_t attr; 170 uint32_t range; 171 void *ss; 172 int rv; 173 uint8_t *seq0, *seq1; 174 175 attr.flags = SDP_ATTR_INVALID; 176 attr.attr = 0; 177 attr.vlen = sizeof(buffer); 178 attr.value = buffer; 179 180 range = SDP_ATTR_RANGE(SDP_ATTR_PROTOCOL_DESCRIPTOR_LIST, 181 SDP_ATTR_PROTOCOL_DESCRIPTOR_LIST); 182 183 ss = sdp_open(&local_bdaddr, &remote_bdaddr); 184 if (ss == NULL || (errno = sdp_error(ss)) != 0) { 185 log_err("%s: %m", service_name); 186 exit(EXIT_FAILURE); 187 } 188 189 log_info("Searching for %s service at %s", 190 service_name, bt_ntoa(&remote_bdaddr, NULL)); 191 192 rv = sdp_search(ss, 1, &service_class, 1, &range, 1, &attr); 193 if (rv != 0) { 194 log_err("%s: %s", service_name, strerror(sdp_error(ss))); 195 exit(EXIT_FAILURE); 196 } 197 198 sdp_close(ss); 199 200 if (attr.flags != SDP_ATTR_OK 201 || attr.attr != SDP_ATTR_PROTOCOL_DESCRIPTOR_LIST) { 202 log_err("%s service not found", service_name); 203 exit(EXIT_FAILURE); 204 } 205 206 /* 207 * we expect the following protocol descriptor list 208 * 209 * seq len 210 * seq len 211 * uuid value == L2CAP 212 * uint16 value16 => PSM 213 * seq len 214 * uuid value == BNEP 215 */ 216 if (_sdp_get_seq(&attr.value, attr.value + attr.vlen, &seq0) 217 && _sdp_get_seq(&seq0, attr.value, &seq1) 218 && _sdp_match_uuid16(&seq1, seq0, SDP_UUID_PROTOCOL_L2CAP) 219 && _sdp_get_uint16(&seq1, seq0, &l2cap_psm) 220 && _sdp_get_seq(&seq0, attr.value, &seq1) 221 && _sdp_match_uuid16(&seq1, seq0, SDP_UUID_PROTOCOL_BNEP)) { 222 log_info("Found PSM %d for service %s", l2cap_psm, service_name); 223 return; 224 } 225 226 log_err("%s query failed", service_name); 227 exit(EXIT_FAILURE); 228} 229