btpand.c revision 1.2
1 /* $NetBSD: btpand.c,v 1.2 2009/04/15 00:38:07 lukem 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 #include <sys/cdefs.h> 29 __COPYRIGHT("@(#) Copyright (c) 2008 Iain Hibbert. All rights reserved."); 30 __RCSID("$NetBSD: btpand.c,v 1.2 2009/04/15 00:38:07 lukem Exp $"); 31 32 #include <sys/wait.h> 33 34 #include <bluetooth.h> 35 #include <err.h> 36 #include <fcntl.h> 37 #include <paths.h> 38 #include <sdp.h> 39 #include <stdio.h> 40 #include <signal.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <unistd.h> 44 45 #include "btpand.h" 46 47 /* global variables */ 48 const char * control_path; /* -c <path> */ 49 const char * interface_name; /* -i <ifname> */ 50 const char * service_name; /* -s <service> */ 51 uint16_t service_class; 52 53 bdaddr_t local_bdaddr; /* -d <addr> */ 54 bdaddr_t remote_bdaddr; /* -a <addr> */ 55 uint16_t l2cap_psm; /* -p <psm> */ 56 int l2cap_mode; /* -m <mode> */ 57 58 int server_limit; /* -n <limit> */ 59 60 static const struct { 61 const char * name; 62 uint16_t class; 63 const char * desc; 64 } services[] = { 65 { "PANU", SDP_SERVICE_CLASS_PANU, "Personal Area Networking User" }, 66 { "NAP", SDP_SERVICE_CLASS_NAP, "Network Acess Point" }, 67 { "GN", SDP_SERVICE_CLASS_GN, "Group Network" }, 68 }; 69 70 static void main_exit(int); 71 static void main_detach(void); 72 static void usage(void); 73 74 int 75 main(int argc, char *argv[]) 76 { 77 unsigned long ul; 78 char * ep; 79 int ch, status; 80 81 while ((ch = getopt(argc, argv, "a:c:d:i:l:m:p:S:s:")) != -1) { 82 switch (ch) { 83 case 'a': /* remote address */ 84 if (!bt_aton(optarg, &remote_bdaddr)) { 85 struct hostent *he; 86 87 if ((he = bt_gethostbyname(optarg)) == NULL) 88 errx(EXIT_FAILURE, "%s: %s", 89 optarg, hstrerror(h_errno)); 90 91 bdaddr_copy(&remote_bdaddr, (bdaddr_t *)he->h_addr); 92 } 93 94 break; 95 96 case 'c': /* control socket path */ 97 control_path = optarg; 98 break; 99 100 case 'd': /* local address */ 101 if (!bt_devaddr(optarg, &local_bdaddr)) 102 err(EXIT_FAILURE, "%s", optarg); 103 104 break; 105 106 case 'i': /* tap interface name */ 107 if (strchr(optarg, '/') == NULL) { 108 asprintf(&ep, "/dev/%s", optarg); 109 interface_name = ep; 110 } else { 111 interface_name = optarg; 112 } 113 114 break; 115 116 case 'l': /* limit server sessions */ 117 ul = strtoul(optarg, &ep, 10); 118 if (*optarg == '\0' || *ep != '\0' || ul == 0) 119 errx(EXIT_FAILURE, "%s: invalid session limit", optarg); 120 121 server_limit = ul; 122 break; 123 124 case 'm': /* link mode */ 125 if (strcasecmp(optarg, "auth") == 0) 126 l2cap_mode = L2CAP_LM_AUTH; 127 else if (strcasecmp(optarg, "encrypt") == 0) 128 l2cap_mode = L2CAP_LM_ENCRYPT; 129 else if (strcasecmp(optarg, "secure") == 0) 130 l2cap_mode = L2CAP_LM_SECURE; 131 else if (strcasecmp(optarg, "none")) 132 errx(EXIT_FAILURE, "%s: unknown mode", optarg); 133 134 break; 135 136 case 'p': /* protocol/service multiplexer */ 137 ul = strtoul(optarg, &ep, 0); 138 if (*optarg == '\0' || *ep != '\0' 139 || ul > 0xffff || L2CAP_PSM_INVALID(ul)) 140 errx(EXIT_FAILURE, "%s: invalid PSM", optarg); 141 142 l2cap_psm = ul; 143 break; 144 145 case 's': /* service */ 146 case 'S': /* service (no SDP) */ 147 for (ul = 0; strcasecmp(optarg, services[ul].name); ul++) { 148 if (ul == __arraycount(services)) 149 errx(EXIT_FAILURE, "%s: unknown service", optarg); 150 } 151 152 if (ch == 's') 153 service_name = services[ul].name; 154 155 service_class = services[ul].class; 156 break; 157 158 default: 159 usage(); 160 /* NOTREACHED */ 161 } 162 } 163 164 argc -= optind; 165 argv += optind; 166 167 /* validate options */ 168 if (bdaddr_any(&local_bdaddr) || service_class == 0) 169 usage(); 170 171 if (!bdaddr_any(&remote_bdaddr) && (server_limit != 0 || 172 control_path != 0 || (service_name != NULL && l2cap_psm != 0))) 173 usage(); 174 175 /* default options */ 176 if (interface_name == NULL) 177 interface_name = "/dev/tap"; 178 179 if (l2cap_psm == 0) 180 l2cap_psm = L2CAP_PSM_BNEP; 181 182 if (bdaddr_any(&remote_bdaddr) && server_limit == 0) { 183 if (service_class == SDP_SERVICE_CLASS_PANU) 184 server_limit = 1; 185 else 186 server_limit = 7; 187 } 188 189 #ifdef L2CAP_LM_MASTER 190 if (server_limit > 1 && service_class != SDP_SERVICE_CLASS_PANU) 191 l2cap_mode |= L2CAP_LM_MASTER; 192 #endif 193 194 /* 195 * fork() now so that the setup can be done in the child process 196 * (as kqueue is not inherited) but block in the parent until the 197 * setup is finished so we can return an error if necessary. 198 */ 199 switch(fork()) { 200 case -1: /* bad */ 201 err(EXIT_FAILURE, "fork() failed"); 202 203 case 0: /* child */ 204 openlog(getprogname(), LOG_NDELAY | LOG_PERROR | LOG_PID, LOG_DAEMON); 205 206 channel_init(); 207 server_init(); 208 event_init(); 209 client_init(); 210 tap_init(); 211 212 main_detach(); 213 214 event_dispatch(); 215 break; 216 217 default: /* parent */ 218 signal(SIGUSR1, main_exit); 219 wait(&status); 220 221 if (WIFEXITED(status)) 222 exit(WEXITSTATUS(status)); 223 224 break; 225 } 226 227 err(EXIT_FAILURE, "exiting"); 228 } 229 230 static void 231 main_exit(int s) 232 { 233 234 /* child is all grown up */ 235 _exit(EXIT_SUCCESS); 236 } 237 238 static void 239 main_detach(void) 240 { 241 int fd; 242 243 if (kill(getppid(), SIGUSR1) == -1) 244 log_err("Could not signal main process: %m"); 245 246 if (setsid() == -1) 247 log_err("setsid() failed"); 248 249 fd = open(_PATH_DEVNULL, O_RDWR, 0); 250 if (fd == -1) { 251 log_err("Could not open %s", _PATH_DEVNULL); 252 } else { 253 (void)dup2(fd, STDIN_FILENO); 254 (void)dup2(fd, STDOUT_FILENO); 255 (void)dup2(fd, STDERR_FILENO); 256 close(fd); 257 } 258 } 259 260 static void 261 usage(void) 262 { 263 const char *p = getprogname(); 264 int n = strlen(p); 265 266 fprintf(stderr, 267 "usage: %s [-i ifname] [-m mode] -a address -d device\n" 268 " %*s {-s service | -S service [-p psm]}\n" 269 " %s [-c path] [-i ifname] [-l limit] [-m mode] [-p psm] -d device\n" 270 " %*s {-s service | -S service}\n" 271 "\n" 272 "Where:\n" 273 "\t-a address remote bluetooth device\n" 274 "\t-c path SDP server socket\n" 275 "\t-d device local bluetooth device\n" 276 "\t-i ifname tap interface\n" 277 "\t-l limit limit server sessions\n" 278 "\t-m mode L2CAP link mode\n" 279 "\t-p psm L2CAP PSM\n" 280 "\t-S service service name (no SDP)\n" 281 "\t-s service service name\n" 282 "\n" 283 "Known services:\n" 284 "", p, n, "", p, n, ""); 285 286 for (n = 0; n < (int)__arraycount(services); n++) 287 fprintf(stderr, "\t%s\t%s\n", services[n].name, services[n].desc); 288 289 exit(EXIT_FAILURE); 290 } 291
Indexes created Wed Sep 24 05:09:52 GMT 2025