1 /* 2 * client.c 3 */ 4 5 /*- 6 * Copyright (c) 2006 Maksim Yevmenkin <m_evmenkin@yahoo.com> 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $Id: client.c,v 1.7 2006/09/07 21:06:53 max Exp $ 31 * $FreeBSD$ 32 */ 33 34 #include <sys/queue.h> 35 #include <assert.h> 36 #include <bluetooth.h> 37 #include <errno.h> 38 #include <fcntl.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <syslog.h> 43 #include <unistd.h> 44 #include <usbhid.h> 45 #include "bthid_config.h" 46 #include "bthidd.h" 47 48 static int32_t client_socket(bdaddr_p bdaddr, uint16_t psm); 49 50 /* 51 * Get next config entry and create outbound connection (if required) 52 * 53 * XXX Do only one device at a time. At least one of my devices (3COM 54 * Bluetooth PCCARD) rejects Create_Connection command if another 55 * Create_Connection command is still pending. Weird... 56 */ 57 58 static int32_t connect_in_progress = 0; 59 60 int32_t 61 client_rescan(bthid_server_p srv) 62 { 63 static hid_device_p d; 64 bthid_session_p s; 65 66 assert(srv != NULL); 67 68 if (connect_in_progress) 69 return (0); /* another connect is still pending */ 70 71 d = get_next_hid_device(d); 72 if (d == NULL) 73 return (0); /* XXX should not happen? empty config? */ 74 75 if ((s = session_by_bdaddr(srv, &d->bdaddr)) != NULL) 76 return (0); /* session already active */ 77 78 if (!d->new_device) { 79 if (d->reconnect_initiate) 80 return (0); /* device will initiate reconnect */ 81 } 82 83 syslog(LOG_NOTICE, "Opening outbound session for %s " \ 84 "(new_device=%d, reconnect_initiate=%d)", 85 bt_ntoa(&d->bdaddr, NULL), d->new_device, d->reconnect_initiate); 86 87 if ((s = session_open(srv, d)) == NULL) { 88 syslog(LOG_CRIT, "Could not create outbound session for %s", 89 bt_ntoa(&d->bdaddr, NULL)); 90 return (-1); 91 } 92 93 /* Open control channel */ 94 s->ctrl = client_socket(&s->bdaddr, d->control_psm); 95 if (s->ctrl < 0) { 96 syslog(LOG_ERR, "Could not open control channel to %s. %s (%d)", 97 bt_ntoa(&s->bdaddr, NULL), strerror(errno), errno); 98 session_close(s); 99 return (-1); 100 } 101 102 s->state = W4CTRL; 103 104 FD_SET(s->ctrl, &srv->wfdset); 105 if (s->ctrl > srv->maxfd) 106 srv->maxfd = s->ctrl; 107 108 connect_in_progress = 1; 109 110 return (0); 111 } 112 113 /* 114 * Process connect on the socket 115 */ 116 117 int32_t 118 client_connect(bthid_server_p srv, int32_t fd) 119 { 120 bthid_session_p s; 121 hid_device_p d; 122 int32_t error; 123 socklen_t len; 124 125 assert(srv != NULL); 126 assert(fd >= 0); 127 128 s = session_by_fd(srv, fd); 129 assert(s != NULL); 130 131 d = get_hid_device(&s->bdaddr); 132 assert(d != NULL); 133 134 error = 0; 135 len = sizeof(error); 136 if (getsockopt(fd, SOL_SOCKET, SO_ERROR, &error, &len) < 0) { 137 syslog(LOG_ERR, "Could not get socket error for %s. %s (%d)", 138 bt_ntoa(&s->bdaddr, NULL), strerror(errno), errno); 139 session_close(s); 140 connect_in_progress = 0; 141 142 return (-1); 143 } 144 145 if (error != 0) { 146 syslog(LOG_ERR, "Could not connect to %s. %s (%d)", 147 bt_ntoa(&s->bdaddr, NULL), strerror(error), error); 148 session_close(s); 149 connect_in_progress = 0; 150 151 return (0); 152 } 153 154 switch (s->state) { 155 case W4CTRL: /* Control channel is open */ 156 assert(s->ctrl == fd); 157 assert(s->intr == -1); 158 159 /* Open interrupt channel */ 160 s->intr = client_socket(&s->bdaddr, d->interrupt_psm); 161 if (s->intr < 0) { 162 syslog(LOG_ERR, "Could not open interrupt channel " \ 163 "to %s. %s (%d)", bt_ntoa(&s->bdaddr, NULL), 164 strerror(errno), errno); 165 session_close(s); 166 connect_in_progress = 0; 167 168 return (-1); 169 } 170 171 s->state = W4INTR; 172 173 FD_SET(s->intr, &srv->wfdset); 174 if (s->intr > srv->maxfd) 175 srv->maxfd = s->intr; 176 177 d->new_device = 0; /* reset new device flag */ 178 write_hids_file(); 179 break; 180 181 case W4INTR: /* Interrupt channel is open */ 182 assert(s->ctrl != -1); 183 assert(s->intr == fd); 184 185 s->state = OPEN; 186 connect_in_progress = 0; 187 188 /* Register session's vkbd descriptor (if any) for read */ 189 if (s->state == OPEN && d->keyboard) { 190 assert(s->vkbd != -1); 191 192 FD_SET(s->vkbd, &srv->rfdset); 193 if (s->vkbd > srv->maxfd) 194 srv->maxfd = s->vkbd; 195 } 196 break; 197 198 default: 199 assert(0); 200 break; 201 } 202 203 /* Move fd to from the write fd set into read fd set */ 204 FD_CLR(fd, &srv->wfdset); 205 FD_SET(fd, &srv->rfdset); 206 207 return (0); 208 } 209 210 /* 211 * Create bound non-blocking socket and initiate connect 212 */ 213 214 static int 215 client_socket(bdaddr_p bdaddr, uint16_t psm) 216 { 217 struct sockaddr_l2cap l2addr; 218 int32_t s, m; 219 220 s = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BLUETOOTH_PROTO_L2CAP); 221 if (s < 0) 222 return (-1); 223 224 m = fcntl(s, F_GETFL); 225 if (m < 0) { 226 close(s); 227 return (-1); 228 } 229 230 if (fcntl(s, F_SETFL, (m|O_NONBLOCK)) < 0) { 231 close(s); 232 return (-1); 233 } 234 235 l2addr.l2cap_len = sizeof(l2addr); 236 l2addr.l2cap_family = AF_BLUETOOTH; 237 memset(&l2addr.l2cap_bdaddr, 0, sizeof(l2addr.l2cap_bdaddr)); 238 l2addr.l2cap_psm = 0; 239 240 if (bind(s, (struct sockaddr *) &l2addr, sizeof(l2addr)) < 0) { 241 close(s); 242 return (-1); 243 } 244 245 memcpy(&l2addr.l2cap_bdaddr, bdaddr, sizeof(l2addr.l2cap_bdaddr)); 246 l2addr.l2cap_psm = htole16(psm); 247 248 if (connect(s, (struct sockaddr *) &l2addr, sizeof(l2addr)) < 0 && 249 errno != EINPROGRESS) { 250 close(s); 251 return (-1); 252 } 253 254 return (s); 255 } 256 257