1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2008-2009 Fredrik Lindberg 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/types.h> 29 #include <sys/param.h> 30 #include <sys/socket.h> 31 #include <sys/sockio.h> 32 #include <sys/select.h> 33 #include <sys/stat.h> 34 #include <sys/sysctl.h> 35 #include <sys/time.h> 36 #include <sys/queue.h> 37 38 #include <arpa/inet.h> 39 #include <net/if.h> 40 #include <net/if_dl.h> 41 #include <net/route.h> 42 #include <netinet/in.h> 43 #include <netinet/in_var.h> 44 45 #include <err.h> 46 #include <errno.h> 47 #include <fcntl.h> 48 #include <termios.h> 49 #include <stdarg.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <stdint.h> 53 #include <string.h> 54 #include <signal.h> 55 #include <syslog.h> 56 #include <unistd.h> 57 #include <ifaddrs.h> 58 #include <libutil.h> 59 #include <time.h> 60 61 /* 62 * Connection utility to ease connectivity using the raw IP packet interface 63 * available on uhso(4) devices. 64 */ 65 66 #define TTY_NAME "/dev/%s" 67 #define SYSCTL_TEST "dev.uhso.%d.%%driver" 68 #define SYSCTL_LOCATION "dev.uhso.%d.%%location" 69 #define SYSCTL_PORTS "dev.uhso.%d.ports" 70 #define SYSCTL_NETIF "dev.uhso.%d.netif" 71 #define SYSCTL_NAME_TTY "dev.uhso.%d.port.%s.tty" 72 #define SYSCTL_NAME_DESC "dev.uhso.%d.port.%s.desc" 73 #define RESOLV_PATH "/etc/resolv.conf" 74 #define PIDFILE "/var/run/uhsoctl.%s.pid" 75 76 static const char *network_access_type[] = { 77 "GSM", 78 "Compact GSM", 79 "UMTS", 80 "GSM (EGPRS)", 81 "HSDPA", 82 "HSUPA", 83 "HSDPA/HSUPA" 84 }; 85 86 static const char *network_reg_status[] = { 87 "Not registered", 88 "Registered", 89 "Searching for network", 90 "Network registration denied", 91 "Unknown", 92 "Registered (roaming)" 93 }; 94 95 struct ctx { 96 int fd; 97 int flags; 98 #define IPASSIGNED 0x01 99 #define FLG_NODAEMON 0x02 /* Don't detach from terminal */ 100 #define FLG_DAEMON 0x04 /* Running as daemon */ 101 #define FLG_DELAYED 0x08 /* Fork into background after connect */ 102 #define FLG_NEWDATA 0x10 103 #define FLG_WATCHDOG 0x20 /* Watchdog enabled */ 104 #define FLG_WDEXP 0x40 /* Watchdog expired */ 105 const char *ifnam; 106 const char *pin; /* device PIN */ 107 108 char pidfile[128]; 109 struct pidfh *pfh; 110 111 time_t watchdog; 112 113 /* PDP context settings */ 114 int pdp_ctx; 115 const char *pdp_apn; 116 const char *pdp_user; 117 const char *pdp_pwd; 118 119 /* Connection status */ 120 int con_status; /* Connected? */ 121 char *con_apn; /* Connected APN */ 122 char *con_oper; /* Operator name */ 123 int con_net_stat; /* Network connection status */ 124 int con_net_type; /* Network connection type */ 125 126 /* Misc. status */ 127 int dbm; 128 129 /* IP and nameserver settings */ 130 struct in_addr ip; 131 char **ns; 132 const char *resolv_path; 133 char *resolv; /* Old resolv.conf */ 134 size_t resolv_sz; 135 }; 136 137 static int readline_buf(const char *, const char *, char *, size_t); 138 static int readline(int, char *, size_t); 139 static void daemonize(struct ctx *); 140 141 static int at_cmd_async(int, const char *, ...); 142 143 typedef union { 144 void *ptr; 145 uint32_t int32; 146 } resp_data; 147 typedef struct { 148 resp_data val[2]; 149 } resp_arg; 150 typedef void (*resp_cb)(resp_arg *, const char *, const char *); 151 152 typedef void (*async_cb)(void *, const char *); 153 struct async_handle { 154 const char *cmd; 155 async_cb func; 156 }; 157 158 static void at_async_creg(void *, const char *); 159 static void at_async_cgreg(void *, const char *); 160 static void at_async_cops(void *, const char *); 161 static void at_async_owancall(void *, const char *); 162 static void at_async_owandata(void *, const char *); 163 static void at_async_csq(void *, const char *); 164 165 static struct async_handle async_cmd[] = { 166 { "+CREG", at_async_creg }, 167 { "+CGREG", at_async_cgreg }, 168 { "+COPS", at_async_cops }, 169 { "+CSQ", at_async_csq }, 170 { "_OWANCALL", at_async_owancall }, 171 { "_OWANDATA", at_async_owandata }, 172 { NULL, NULL } 173 }; 174 175 struct timer_entry; 176 struct timers { 177 TAILQ_HEAD(, timer_entry) head; 178 int res; 179 }; 180 181 typedef void (*tmr_cb)(int, void *); 182 struct timer_entry { 183 TAILQ_ENTRY(timer_entry) next; 184 int id; 185 int timeout; 186 tmr_cb func; 187 void *arg; 188 }; 189 190 191 static struct timers timers; 192 static volatile int running = 1; 193 static int syslog_open = 0; 194 static char syslog_title[64]; 195 196 /* Periodic timer, runs ready timer tasks every tick */ 197 static void 198 tmr_run(struct timers *tmrs) 199 { 200 struct timer_entry *te, *te2; 201 202 te = TAILQ_FIRST(&tmrs->head); 203 if (te == NULL) 204 return; 205 206 te->timeout -= tmrs->res; 207 while (te->timeout <= 0) { 208 te2 = TAILQ_NEXT(te, next); 209 TAILQ_REMOVE(&tmrs->head, te, next); 210 te->func(te->id, te->arg); 211 free(te); 212 te = te2; 213 if (te == NULL) 214 break; 215 } 216 } 217 218 /* Add a new timer */ 219 static void 220 tmr_add(struct timers *tmrs, int id, int timeout, tmr_cb func, void *arg) 221 { 222 struct timer_entry *te, *te2, *te3; 223 224 te = malloc(sizeof(struct timer_entry)); 225 memset(te, 0, sizeof(struct timer_entry)); 226 227 te->timeout = timeout; 228 te->func = func; 229 te->arg = arg; 230 te->id = id; 231 232 te2 = TAILQ_FIRST(&tmrs->head); 233 234 if (TAILQ_EMPTY(&tmrs->head)) { 235 TAILQ_INSERT_HEAD(&tmrs->head, te, next); 236 } else if (te->timeout < te2->timeout) { 237 te2->timeout -= te->timeout; 238 TAILQ_INSERT_HEAD(&tmrs->head, te, next); 239 } else { 240 while (te->timeout >= te2->timeout) { 241 te->timeout -= te2->timeout; 242 te3 = TAILQ_NEXT(te2, next); 243 if (te3 == NULL || te3->timeout > te->timeout) 244 break; 245 te2 = te3; 246 } 247 TAILQ_INSERT_AFTER(&tmrs->head, te2, te, next); 248 } 249 } 250 251 #define watchdog_enable(ctx) (ctx)->flags |= FLG_WATCHDOG 252 #define watchdog_disable(ctx) (ctx)->flags &= ~FLG_WATCHDOG 253 254 static void 255 watchdog_reset(struct ctx *ctx, int timeout) 256 { 257 struct timespec tp; 258 259 clock_gettime(CLOCK_MONOTONIC, &tp), 260 ctx->watchdog = tp.tv_sec + timeout; 261 262 watchdog_enable(ctx); 263 } 264 265 static void 266 tmr_creg(int id, void *arg) 267 { 268 struct ctx *ctx = arg; 269 270 at_cmd_async(ctx->fd, "AT+CREG?\r\n"); 271 watchdog_reset(ctx, 10); 272 } 273 274 static void 275 tmr_cgreg(int id, void *arg) 276 { 277 struct ctx *ctx = arg; 278 279 at_cmd_async(ctx->fd, "AT+CGREG?\r\n"); 280 watchdog_reset(ctx, 10); 281 } 282 283 static void 284 tmr_status(int id, void *arg) 285 { 286 struct ctx *ctx = arg; 287 288 at_cmd_async(ctx->fd, "AT+CSQ\r\n"); 289 watchdog_reset(ctx, 10); 290 } 291 292 static void 293 tmr_watchdog(int id, void *arg) 294 { 295 struct ctx *ctx = arg; 296 pid_t self; 297 struct timespec tp; 298 299 tmr_add(&timers, 1, 5, tmr_watchdog, ctx); 300 301 if (!(ctx->flags & FLG_WATCHDOG)) 302 return; 303 304 clock_gettime(CLOCK_MONOTONIC, &tp); 305 306 if (tp.tv_sec >= ctx->watchdog) { 307 #ifdef DEBUG 308 fprintf(stderr, "Watchdog expired\n"); 309 #endif 310 ctx->flags |= FLG_WDEXP; 311 self = getpid(); 312 kill(self, SIGHUP); 313 } 314 } 315 316 static void 317 sig_handle(int sig) 318 { 319 320 switch (sig) { 321 case SIGHUP: 322 case SIGINT: 323 case SIGQUIT: 324 case SIGTERM: 325 running = 0; 326 break; 327 case SIGALRM: 328 tmr_run(&timers); 329 break; 330 } 331 } 332 333 static void 334 logger(int pri, const char *fmt, ...) 335 { 336 char *buf; 337 va_list ap; 338 339 va_start(ap, fmt); 340 vasprintf(&buf, fmt, ap); 341 if (syslog_open) 342 syslog(pri, "%s", buf); 343 else { 344 switch (pri) { 345 case LOG_INFO: 346 case LOG_NOTICE: 347 printf("%s\n", buf); 348 break; 349 default: 350 fprintf(stderr, "%s: %s\n", getprogname(), buf); 351 break; 352 } 353 } 354 355 free(buf); 356 va_end(ap); 357 } 358 359 #define if_ifup(ifnam) if_setflags(ifnam, IFF_UP) 360 #define if_ifdown(ifnam) if_setflags(ifnam, -IFF_UP) 361 362 static int 363 if_setflags(const char *ifnam, int flags) 364 { 365 struct ifreq ifr; 366 int fd, error; 367 unsigned int oflags = 0; 368 369 memset(&ifr, 0, sizeof(struct ifreq)); 370 strlcpy(ifr.ifr_name, ifnam, sizeof(ifr.ifr_name)); 371 372 fd = socket(AF_INET, SOCK_DGRAM, 0); 373 if (fd < 0) 374 return (-1); 375 376 error = ioctl(fd, SIOCGIFFLAGS, &ifr); 377 if (error == 0) { 378 oflags = (ifr.ifr_flags & 0xffff) | (ifr.ifr_flagshigh << 16); 379 } 380 381 if (flags < 0) 382 oflags &= ~(-flags); 383 else 384 oflags |= flags; 385 386 ifr.ifr_flags = oflags & 0xffff; 387 ifr.ifr_flagshigh = oflags >> 16; 388 389 error = ioctl(fd, SIOCSIFFLAGS, &ifr); 390 if (error != 0) 391 warn("ioctl SIOCSIFFLAGS"); 392 393 close(fd); 394 return (error); 395 } 396 397 static int 398 ifaddr_add(const char *ifnam, struct sockaddr *sa, struct sockaddr *mask) 399 { 400 struct ifaliasreq ifra; 401 int error, fd; 402 403 memset(&ifra, 0, sizeof(ifra)); 404 strlcpy(ifra.ifra_name, ifnam, sizeof(ifra.ifra_name)); 405 memcpy(&ifra.ifra_addr, sa, sa->sa_len); 406 memcpy(&ifra.ifra_mask, mask, mask->sa_len); 407 408 fd = socket(AF_INET, SOCK_DGRAM, 0); 409 if (fd < 0) 410 return (-1); 411 412 error = ioctl(fd, SIOCAIFADDR, (caddr_t)&ifra); 413 if (error != 0) 414 warn("ioctl SIOCAIFADDR"); 415 416 close(fd); 417 return (error); 418 } 419 420 static int 421 ifaddr_del(const char *ifnam, struct sockaddr *sa) 422 { 423 struct ifreq ifr; 424 int error, fd; 425 426 memset(&ifr, 0, sizeof(ifr)); 427 strlcpy(ifr.ifr_name, ifnam, sizeof(ifr.ifr_name)); 428 memcpy(&ifr.ifr_addr, sa, sa->sa_len); 429 430 fd = socket(AF_INET, SOCK_DGRAM, 0); 431 if (fd < 0) 432 return (-1); 433 434 error = ioctl(fd, SIOCDIFADDR, (caddr_t)&ifr); 435 if (error != 0) 436 warn("ioctl SIOCDIFADDR"); 437 438 close(fd); 439 return (error); 440 } 441 442 static int 443 set_nameservers(struct ctx *ctx, const char *respath, int ns, ...) 444 { 445 int i, n, fd; 446 FILE *fp; 447 char *p; 448 va_list ap; 449 struct stat sb; 450 char buf[512]; 451 452 if (ctx->ns != NULL) { 453 for (i = 0; ctx->ns[i] != NULL; i++) { 454 free(ctx->ns[i]); 455 } 456 free(ctx->ns); 457 ctx->ns = NULL; 458 } 459 460 fd = open(respath, O_RDWR | O_CREAT | O_NOFOLLOW, 0666); 461 if (fd < 0) 462 return (-1); 463 464 if (ns == 0) { 465 /* Attempt to restore old resolv.conf */ 466 if (ctx->resolv != NULL) { 467 ftruncate(fd, 0); 468 lseek(fd, 0, SEEK_SET); 469 write(fd, ctx->resolv, ctx->resolv_sz); 470 free(ctx->resolv); 471 ctx->resolv = NULL; 472 ctx->resolv_sz = 0; 473 } 474 close(fd); 475 return (0); 476 } 477 478 479 ctx->ns = malloc(sizeof(char *) * (ns + 1)); 480 if (ctx->ns == NULL) { 481 close(fd); 482 return (-1); 483 } 484 485 va_start(ap, ns); 486 for (i = 0; i < ns; i++) { 487 p = va_arg(ap, char *); 488 ctx->ns[i] = strdup(p); 489 } 490 ctx->ns[i] = NULL; 491 va_end(ap); 492 493 /* Attempt to backup the old resolv.conf */ 494 if (ctx->resolv == NULL) { 495 i = fstat(fd, &sb); 496 if (i == 0 && sb.st_size != 0) { 497 ctx->resolv_sz = sb.st_size; 498 ctx->resolv = malloc(sb.st_size); 499 if (ctx->resolv != NULL) { 500 n = read(fd, ctx->resolv, sb.st_size); 501 if (n != sb.st_size) { 502 free(ctx->resolv); 503 ctx->resolv = NULL; 504 } 505 } 506 } 507 } 508 509 510 ftruncate(fd, 0); 511 lseek(fd, 0, SEEK_SET); 512 fp = fdopen(fd, "w"); 513 514 /* 515 * Write back everything other than nameserver entries to the 516 * new resolv.conf 517 */ 518 if (ctx->resolv != NULL) { 519 p = ctx->resolv; 520 while ((i = readline_buf(p, ctx->resolv + ctx->resolv_sz, buf, 521 sizeof(buf))) > 0) { 522 p += i; 523 if (strncasecmp(buf, "nameserver", 10) == 0) 524 continue; 525 fprintf(fp, "%s", buf); 526 } 527 } 528 529 for (i = 0; ctx->ns[i] != NULL; i++) { 530 fprintf(fp, "nameserver %s\n", ctx->ns[i]); 531 } 532 fclose(fp); 533 return (0); 534 } 535 536 /* Read a \n-terminated line from buffer */ 537 static int 538 readline_buf(const char *s, const char *e, char *buf, size_t bufsz) 539 { 540 int pos = 0; 541 char *p = buf; 542 543 for (; s < e; s++) { 544 *p = *s; 545 pos++; 546 if (pos >= (bufsz - 1)) 547 break; 548 if (*p++ == '\n') 549 break; 550 } 551 *p = '\0'; 552 return (pos); 553 } 554 555 /* Read a \n-terminated line from file */ 556 static int 557 readline(int fd, char *buf, size_t bufsz) 558 { 559 int n = 0, pos = 0; 560 char *p = buf; 561 562 for (;;) { 563 n = read(fd, p, 1); 564 if (n <= 0) 565 break; 566 pos++; 567 if (pos >= (bufsz - 1)) 568 break; 569 if (*p++ == '\n') 570 break; 571 } 572 *p = '\0'; 573 return (n <= 0 ? n : pos); 574 } 575 576 /* 577 * Synchronous AT command 578 */ 579 static int 580 at_cmd(struct ctx *ctx, const char *resp, resp_cb cb, resp_arg *ra, const char *cf, ...) 581 { 582 char buf[512]; 583 char cmd[64]; 584 size_t l; 585 int n, error, retval = 0; 586 va_list ap; 587 fd_set set; 588 char *p; 589 590 va_start(ap, cf); 591 vsnprintf(cmd, sizeof(cmd), cf, ap); 592 va_end(ap); 593 594 #ifdef DEBUG 595 fprintf(stderr, "SYNC_CMD: %s", cmd); 596 #endif 597 598 l = strlen(cmd); 599 n = write(ctx->fd, cmd, l); 600 if (n <= 0) 601 return (-1); 602 603 if (resp != NULL) { 604 l = strlen(resp); 605 #ifdef DEBUG 606 fprintf(stderr, "SYNC_EXP: %s (%zu)\n", resp, l); 607 #endif 608 } 609 610 for (;;) { 611 bzero(buf, sizeof(buf)); 612 613 FD_ZERO(&set); 614 watchdog_reset(ctx, 5); 615 do { 616 FD_SET(ctx->fd, &set); 617 error = select(ctx->fd + 1, &set, NULL, NULL, NULL); 618 if (ctx->flags & FLG_WDEXP) { 619 watchdog_disable(ctx); 620 return (-2); 621 } 622 } while (error <= 0 && errno == EINTR); 623 watchdog_disable(ctx); 624 625 if (error <= 0) { 626 retval = -2; 627 break; 628 } 629 630 n = readline(ctx->fd, buf, sizeof(buf)); 631 if (n <= 0) { 632 retval = -2; 633 break; 634 } 635 636 if (strcmp(buf, "\r\n") == 0 || strcmp(buf, "\n") == 0) 637 continue; 638 639 if ((p = strchr(buf, '\r')) != NULL) 640 *p = '\0'; 641 else if ((p = strchr(buf, '\n')) != NULL) 642 *p = '\0'; 643 #ifdef DEBUG 644 fprintf(stderr, "SYNC_RESP: %s\n", buf); 645 #endif 646 647 /* Skip local echo */ 648 if (strncasecmp(cmd, buf, strlen(buf)) == 0) 649 continue; 650 651 if (cb != NULL) 652 cb(ra, cmd, buf); 653 654 if (strncmp(buf, "OK", 2) == 0) { 655 retval = retval ? retval : 0; 656 break; 657 } else if (strstr(buf, "ERROR") != NULL) { 658 retval = -1; 659 break; 660 } 661 if (resp != NULL) 662 retval = strncmp(buf, resp, l); 663 } 664 #ifdef DEBUG 665 fprintf(stderr, "SYNC_RETVAL=%d\n", retval); 666 #endif 667 return (retval); 668 } 669 670 static int 671 at_cmd_async(int fd, const char *cf, ...) 672 { 673 size_t l; 674 va_list ap; 675 char cmd[64]; 676 677 va_start(ap, cf); 678 vsnprintf(cmd, sizeof(cmd), cf, ap); 679 va_end(ap); 680 681 #ifdef DEBUG 682 fprintf(stderr, "CMD: %s", cmd); 683 #endif 684 l = strlen(cmd); 685 return (write(fd, cmd, l)); 686 } 687 688 static void 689 saveresp(resp_arg *ra, const char *cmd, const char *resp) 690 { 691 char **buf; 692 int i = ra->val[1].int32; 693 694 #ifdef DEBUG 695 fprintf(stderr, "Save '%s'\n", resp); 696 #endif 697 698 buf = realloc(ra->val[0].ptr, sizeof(char *) * (i + 1)); 699 if (buf == NULL) 700 return; 701 702 buf[i] = strdup(resp); 703 704 ra->val[0].ptr = buf; 705 ra->val[1].int32 = i + 1; 706 } 707 708 static void 709 freeresp(resp_arg *ra) 710 { 711 char **buf; 712 int i; 713 714 buf = ra->val[0].ptr; 715 for (i = 0; i < ra->val[1].int32; i++) { 716 free(buf[i]); 717 } 718 free(buf); 719 } 720 721 static void 722 at_async_creg(void *arg, const char *resp) 723 { 724 struct ctx *ctx = arg; 725 int n, reg; 726 727 n = sscanf(resp, "+CREG: %*d,%d", ®); 728 if (n != 1) { 729 n = sscanf(resp, "+CREG: %d", ®); 730 if (n != 1) 731 return; 732 } 733 734 if (ctx->con_net_stat != 1 && ctx->con_net_stat != 5) { 735 tmr_add(&timers, 1, 1, tmr_creg, ctx); 736 } 737 else { 738 tmr_add(&timers, 1, 30, tmr_creg, ctx); 739 } 740 741 if (ctx->con_net_stat == reg) 742 return; 743 744 ctx->con_net_stat = reg; 745 at_cmd_async(ctx->fd, "AT+COPS?\r\n"); 746 } 747 748 static void 749 at_async_cgreg(void *arg, const char *resp) 750 { 751 struct ctx *ctx = arg; 752 int n, reg; 753 754 n = sscanf(resp, "+CGREG: %*d,%d", ®); 755 if (n != 1) { 756 n = sscanf(resp, "+CGREG: %d", ®); 757 if (n != 1) 758 return; 759 } 760 761 if (ctx->con_net_stat != 1 && ctx->con_net_stat != 5) { 762 tmr_add(&timers, 1, 1, tmr_cgreg, ctx); 763 } 764 else { 765 tmr_add(&timers, 1, 30, tmr_cgreg, ctx); 766 } 767 768 if (ctx->con_net_stat == reg) 769 return; 770 771 ctx->con_net_stat = reg; 772 at_cmd_async(ctx->fd, "AT+COPS?\r\n"); 773 } 774 775 776 static void 777 at_async_cops(void *arg, const char *resp) 778 { 779 struct ctx *ctx = arg; 780 int n, at; 781 char opr[64]; 782 783 n = sscanf(resp, "+COPS: %*d,%*d,\"%[^\"]\",%d", 784 opr, &at); 785 if (n != 2) 786 return; 787 788 if (ctx->con_oper != NULL) { 789 if (ctx->con_net_type == at && 790 strcasecmp(opr, ctx->con_oper) == 0) 791 return; 792 free(ctx->con_oper); 793 } 794 795 ctx->con_oper = strdup(opr); 796 ctx->con_net_type = at; 797 798 if (ctx->con_net_stat == 1 || ctx->con_net_stat == 5) { 799 logger(LOG_NOTICE, "%s to \"%s\" (%s)", 800 network_reg_status[ctx->con_net_stat], 801 ctx->con_oper, network_access_type[ctx->con_net_type]); 802 if (ctx->con_status != 1) { 803 at_cmd_async(ctx->fd, "AT_OWANCALL=%d,1,1\r\n", 804 ctx->pdp_ctx); 805 } 806 } 807 else { 808 logger(LOG_NOTICE, "%s (%s)", 809 network_reg_status[ctx->con_net_stat], 810 network_access_type[ctx->con_net_type]); 811 } 812 } 813 814 /* 815 * Signal strength for pretty console output 816 * 817 * From 3GPP TS 27.007 V8.3.0, Section 8.5 818 * 0 = -113 dBm or less 819 * 1 = -111 dBm 820 * 2...30 = -109...-53 dBm 821 * 31 = -51 dBm or greater 822 * 823 * So, dbm = (rssi * 2) - 113 824 */ 825 static void 826 at_async_csq(void *arg, const char *resp) 827 { 828 struct ctx *ctx = arg; 829 int n, rssi; 830 831 n = sscanf(resp, "+CSQ: %d,%*d", &rssi); 832 if (n != 1) 833 return; 834 if (rssi == 99) 835 ctx->dbm = 0; 836 else { 837 ctx->dbm = (rssi * 2) - 113; 838 tmr_add(&timers, 1, 15, tmr_status, ctx); 839 } 840 841 ctx->flags |= FLG_NEWDATA; 842 } 843 844 static void 845 at_async_owancall(void *arg, const char *resp) 846 { 847 struct ctx *ctx = arg; 848 int n, i; 849 850 n = sscanf(resp, "_OWANCALL: %*d,%d", &i); 851 if (n != 1) 852 return; 853 854 if (i == ctx->con_status) 855 return; 856 857 at_cmd_async(ctx->fd, "AT_OWANDATA=%d\r\n", ctx->pdp_ctx); 858 859 ctx->con_status = i; 860 if (ctx->con_status == 1) { 861 logger(LOG_NOTICE, "Connected to \"%s\" (%s), %s", 862 ctx->con_oper, ctx->con_apn, 863 network_access_type[ctx->con_net_type]); 864 } 865 else { 866 logger(LOG_NOTICE, "Disconnected from \"%s\" (%s)", 867 ctx->con_oper, ctx->con_apn); 868 } 869 } 870 871 static void 872 at_async_owandata(void *arg, const char *resp) 873 { 874 struct ctx *ctx = arg; 875 char ip[40], ns1[40], ns2[40]; 876 int n, error, rs; 877 struct ifaddrs *ifap, *ifa; 878 struct sockaddr_in sin, mask; 879 struct sockaddr_dl sdl; 880 struct { 881 struct rt_msghdr rtm; 882 char buf[512]; 883 } r; 884 char *cp = r.buf; 885 886 n = sscanf(resp, "_OWANDATA: %*d, %[^,], %*[^,], %[^,], %[^,]", 887 ip, ns1, ns2); 888 if (n != 3) 889 return; 890 891 /* XXX: AF_INET assumption */ 892 893 logger(LOG_NOTICE, "IP address: %s, Nameservers: %s, %s", ip, ns1, ns2); 894 895 sin.sin_len = mask.sin_len = sizeof(struct sockaddr_in); 896 memset(&mask.sin_addr.s_addr, 0xff, sizeof(mask.sin_addr.s_addr)); 897 sin.sin_family = mask.sin_family = AF_INET; 898 899 if (ctx->flags & IPASSIGNED) { 900 memcpy(&sin.sin_addr.s_addr, &ctx->ip.s_addr, 901 sizeof(sin.sin_addr.s_addr)); 902 ifaddr_del(ctx->ifnam, (struct sockaddr *)&sin); 903 } 904 inet_pton(AF_INET, ip, &ctx->ip.s_addr); 905 memcpy(&sin.sin_addr.s_addr, &ctx->ip.s_addr, 906 sizeof(sin.sin_addr.s_addr)); 907 908 error = ifaddr_add(ctx->ifnam, (struct sockaddr *)&sin, 909 (struct sockaddr *)&mask); 910 if (error != 0) { 911 logger(LOG_ERR, "failed to set ip-address"); 912 return; 913 } 914 915 if_ifup(ctx->ifnam); 916 917 ctx->flags |= IPASSIGNED; 918 919 set_nameservers(ctx, ctx->resolv_path, 0); 920 error = set_nameservers(ctx, ctx->resolv_path, 2, ns1, ns2); 921 if (error != 0) { 922 logger(LOG_ERR, "failed to set nameservers"); 923 } 924 925 error = getifaddrs(&ifap); 926 if (error != 0) { 927 logger(LOG_ERR, "getifaddrs: %s", strerror(errno)); 928 return; 929 } 930 931 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 932 if (ifa->ifa_addr->sa_family != AF_LINK) 933 continue; 934 if (strcmp(ctx->ifnam, ifa->ifa_name) == 0) { 935 memcpy(&sdl, (struct sockaddr_dl *)ifa->ifa_addr, 936 sizeof(struct sockaddr_dl)); 937 break; 938 } 939 } 940 if (ifa == NULL) 941 return; 942 943 rs = socket(PF_ROUTE, SOCK_RAW, 0); 944 if (rs < 0) { 945 logger(LOG_ERR, "socket PF_ROUTE: %s", strerror(errno)); 946 return; 947 } 948 949 memset(&r, 0, sizeof(r)); 950 951 r.rtm.rtm_version = RTM_VERSION; 952 r.rtm.rtm_type = RTM_ADD; 953 r.rtm.rtm_flags = RTF_UP | RTF_STATIC; 954 r.rtm.rtm_pid = getpid(); 955 memset(&sin, 0, sizeof(struct sockaddr_in)); 956 sin.sin_family = AF_INET; 957 sin.sin_len = sizeof(struct sockaddr_in); 958 959 memcpy(cp, &sin, sin.sin_len); 960 cp += SA_SIZE(&sin); 961 memcpy(cp, &sdl, sdl.sdl_len); 962 cp += SA_SIZE(&sdl); 963 memcpy(cp, &sin, sin.sin_len); 964 r.rtm.rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK; 965 r.rtm.rtm_msglen = sizeof(r); 966 967 n = write(rs, &r, r.rtm.rtm_msglen); 968 if (n != r.rtm.rtm_msglen) { 969 r.rtm.rtm_type = RTM_DELETE; 970 n = write(rs, &r, r.rtm.rtm_msglen); 971 r.rtm.rtm_type = RTM_ADD; 972 n = write(rs, &r, r.rtm.rtm_msglen); 973 } 974 975 if (n != r.rtm.rtm_msglen) { 976 logger(LOG_ERR, "failed to set default route: %s", 977 strerror(errno)); 978 } 979 close(rs); 980 981 /* Delayed daemonization */ 982 if ((ctx->flags & FLG_DELAYED) && !(ctx->flags & FLG_NODAEMON)) 983 daemonize(ctx); 984 } 985 986 static int 987 at_async(struct ctx *ctx, void *arg) 988 { 989 int n, i; 990 size_t l; 991 char buf[512]; 992 993 watchdog_reset(ctx, 15); 994 995 bzero(buf, sizeof(buf)); 996 n = readline(ctx->fd, buf, sizeof(buf)); 997 if (n <= 0) 998 return (n <= 0 ? -1 : 0); 999 1000 #ifdef DEBUG 1001 fprintf(stderr, "AT_ASYNC_RESP: %s", buf); 1002 #endif 1003 for (i = 0; async_cmd[i].cmd != NULL; i++) { 1004 l = strlen(async_cmd[i].cmd); 1005 if (strncmp(buf, async_cmd[i].cmd, l) == 0) { 1006 async_cmd[i].func(arg, buf); 1007 } 1008 } 1009 return (0); 1010 } 1011 1012 static const char *port_type_list[] = { 1013 "control", "application", "application2", NULL 1014 }; 1015 1016 /* 1017 * Attempts to find a list of control tty for the interface 1018 * FreeBSD attaches USB devices per interface so we have to go through 1019 * hoops to find which ttys that belong to our network interface. 1020 */ 1021 static char ** 1022 get_tty(struct ctx *ctx) 1023 { 1024 char buf[64], data[128]; 1025 int error, i, usbport, usbport0, list_size = 0; 1026 char **list = NULL; 1027 size_t len; 1028 const char **p, *q; 1029 1030 /* 1031 * Look for the network interface first 1032 */ 1033 for (i = 0; ; i++) { 1034 /* Check if we still have uhso nodes to check */ 1035 snprintf(buf, 64, SYSCTL_TEST, i); 1036 len = 127; 1037 error = sysctlbyname(buf, data, &len, NULL, 0); 1038 data[len] = '\0'; 1039 #ifdef DEBUG 1040 fprintf(stderr, "sysctl %s returned(%d): %s\n", 1041 buf, error, error == 0 ? data : "FAILED"); 1042 #endif 1043 if (error < 0 || strcasecmp(data, "uhso") != 0) 1044 return NULL; 1045 1046 /* Check if this node contains the network interface we want */ 1047 snprintf(buf, 64, SYSCTL_NETIF, i); 1048 len = 127; 1049 error = sysctlbyname(buf, data, &len, NULL, 0); 1050 data[len] = '\0'; 1051 #ifdef DEBUG 1052 fprintf(stderr, "sysctl %s returned(%d): %s\n", 1053 buf, error, error == 0 ? data : "FAILED"); 1054 #endif 1055 if (error == 0 && strcasecmp(data, ctx->ifnam) == 0) 1056 break; 1057 } 1058 1059 /* Figure out the USB port location */ 1060 snprintf(buf, 64, SYSCTL_LOCATION, i); 1061 len = 127; 1062 error = sysctlbyname(buf, data, &len, NULL, 0); 1063 data[len] = '\0'; 1064 #ifdef DEBUG 1065 fprintf(stderr, "sysctl %s returned(%d): %s\n", 1066 buf, error, error == 0 ? data : "FAILED"); 1067 #endif 1068 if (error != 0) 1069 return (NULL); 1070 1071 q = strstr(data, "port="); 1072 if (q != NULL) { 1073 error = sscanf(q, " port=%d", &usbport); 1074 if (error != 1) { 1075 #ifdef DEBUG 1076 fprintf(stderr, "failed to read usb port location from '%s'\n", data); 1077 #endif 1078 return (NULL); 1079 } 1080 } else { 1081 #ifdef DEBUG 1082 fprintf(stderr, "failed to parse location '%s'\n", data); 1083 #endif 1084 return (NULL); 1085 } 1086 #ifdef DEBUG 1087 fprintf(stderr, "USB port location=%d\n", usbport); 1088 #endif 1089 1090 /* 1091 * Now go through it all again but only look at those matching the 1092 * usb port location we found. 1093 */ 1094 for (i = 0; ; i++) { 1095 snprintf(buf, 64, SYSCTL_LOCATION, i); 1096 len = 127; 1097 memset(&data, 0, sizeof(data)); 1098 error = sysctlbyname(buf, data, &len, NULL, 0); 1099 if (error != 0) 1100 break; 1101 data[len] = '\0'; 1102 q = strstr(data, "port="); 1103 if (q == NULL) 1104 continue; 1105 sscanf(q, " port=%d", &usbport0); 1106 if (usbport != usbport0) 1107 continue; 1108 1109 /* Try to add ports */ 1110 for (p = port_type_list; *p != NULL; p++) { 1111 snprintf(buf, 64, SYSCTL_NAME_TTY, i, *p); 1112 len = 127; 1113 memset(&data, 0, sizeof(data)); 1114 error = sysctlbyname(buf, data, &len, NULL, 0); 1115 data[len] = '\0'; 1116 #ifdef DEBUG 1117 fprintf(stderr, "sysctl %s returned(%d): %s\n", 1118 buf, error, error == 0 ? data : "FAILED"); 1119 #endif 1120 if (error == 0) { 1121 list = realloc(list, (list_size + 1) * sizeof(char *)); 1122 list[list_size] = malloc(strlen(data) + strlen(TTY_NAME)); 1123 sprintf(list[list_size], TTY_NAME, data); 1124 list_size++; 1125 } 1126 } 1127 } 1128 list = realloc(list, (list_size + 1) * sizeof(char *)); 1129 list[list_size] = NULL; 1130 return (list); 1131 } 1132 1133 static int 1134 do_connect(struct ctx *ctx, const char *tty) 1135 { 1136 int i, error, needcfg; 1137 resp_arg ra; 1138 struct termios t; 1139 char **buf; 1140 1141 #ifdef DEBUG 1142 fprintf(stderr, "Attempting to open %s\n", tty); 1143 #endif 1144 1145 ctx->fd = open(tty, O_RDWR); 1146 if (ctx->fd < 0) { 1147 #ifdef DEBUG 1148 fprintf(stderr, "Failed to open %s\n", tty); 1149 #endif 1150 return (-1); 1151 } 1152 1153 tcgetattr(ctx->fd, &t); 1154 t.c_oflag = 0; 1155 t.c_iflag = 0; 1156 t.c_cflag = CLOCAL | CREAD; 1157 t.c_lflag = 0; 1158 tcsetattr(ctx->fd, TCSAFLUSH, &t); 1159 1160 error = at_cmd(ctx, NULL, NULL, NULL, "AT\r\n"); 1161 if (error == -2) { 1162 warnx("failed to read from device %s", tty); 1163 return (-1); 1164 } 1165 1166 /* Check for PIN */ 1167 error = at_cmd(ctx, "+CPIN: READY", NULL, NULL, "AT+CPIN?\r\n"); 1168 if (error != 0) { 1169 ra.val[0].ptr = NULL; 1170 ra.val[1].int32 = 0; 1171 error = at_cmd(ctx, "+CME ERROR", saveresp, &ra, "AT+CPIN?\r\n"); 1172 if (ra.val[1].int32 > 0) { 1173 char *p; 1174 1175 buf = ra.val[0].ptr; 1176 if (strstr(buf[0], "+CME ERROR:") != NULL) { 1177 buf[0] += 12; 1178 errx(1, "%s", buf[0]); 1179 } 1180 freeresp(&ra); 1181 } else 1182 freeresp(&ra); 1183 1184 if (ctx->pin == NULL) { 1185 errx(1, "device requires PIN"); 1186 } 1187 1188 error = at_cmd(ctx, NULL, NULL, NULL, "AT+CPIN=\"%s\"\r\n", 1189 ctx->pin); 1190 if (error != 0) { 1191 errx(1, "wrong PIN"); 1192 } 1193 } 1194 1195 /* 1196 * Check if a PDP context has been configured and configure one 1197 * if needed. 1198 */ 1199 ra.val[0].ptr = NULL; 1200 ra.val[1].int32 = 0; 1201 error = at_cmd(ctx, "+CGDCONT", saveresp, &ra, "AT+CGDCONT?\r\n"); 1202 buf = ra.val[0].ptr; 1203 needcfg = 1; 1204 for (i = 0; i < ra.val[1].int32; i++) { 1205 char apn[256]; 1206 int cid; 1207 error = sscanf(buf[i], "+CGDCONT: %d,\"%*[^\"]\",\"%[^\"]\"", 1208 &cid, apn); 1209 if (error != 2) { 1210 free(buf[i]); 1211 continue; 1212 } 1213 1214 if (cid == ctx->pdp_ctx) { 1215 ctx->con_apn = strdup(apn); 1216 if (ctx->pdp_apn != NULL) { 1217 if (strcmp(apn, ctx->pdp_apn) == 0) 1218 needcfg = 0; 1219 } 1220 else { 1221 needcfg = 0; 1222 } 1223 } 1224 free(buf[i]); 1225 } 1226 free(buf); 1227 1228 if (needcfg) { 1229 if (ctx->pdp_apn == NULL) 1230 errx(1, "device is not configured and no APN given"); 1231 1232 error = at_cmd(ctx, NULL, NULL, NULL, 1233 "AT+CGDCONT=%d,,\"%s\"\r\n", ctx->pdp_ctx, ctx->pdp_apn); 1234 if (error != 0) { 1235 errx(1, "failed to configure device"); 1236 } 1237 ctx->con_apn = strdup(ctx->pdp_apn); 1238 } 1239 1240 if (ctx->pdp_user != NULL || ctx->pdp_pwd != NULL) { 1241 at_cmd(ctx, NULL, NULL, NULL, 1242 "AT$QCPDPP=%d,1,\"%s\",\"%s\"\r\n", ctx->pdp_ctx, 1243 (ctx->pdp_user != NULL) ? ctx->pdp_user : "", 1244 (ctx->pdp_pwd != NULL) ? ctx->pdp_pwd : ""); 1245 } 1246 1247 error = at_cmd(ctx, NULL, NULL, NULL, "AT_OWANCALL=%d,0,0\r\n", 1248 ctx->pdp_ctx); 1249 if (error != 0) 1250 return (-1); 1251 1252 at_cmd_async(ctx->fd, "AT+CGREG?\r\n"); 1253 at_cmd_async(ctx->fd, "AT+CREG?\r\n"); 1254 1255 tmr_add(&timers, 1, 5, tmr_status, ctx); 1256 return (0); 1257 } 1258 1259 static void 1260 do_disconnect(struct ctx *ctx) 1261 { 1262 struct sockaddr_in sin; 1263 1264 /* Disconnect */ 1265 at_cmd(ctx, NULL, NULL, NULL, "AT_OWANCALL=%d,0,0\r\n", 1266 ctx->pdp_ctx); 1267 close(ctx->fd); 1268 1269 /* Remove ip-address from interface */ 1270 if (ctx->flags & IPASSIGNED) { 1271 sin.sin_len = sizeof(struct sockaddr_in); 1272 sin.sin_family = AF_INET; 1273 memcpy(&sin.sin_addr.s_addr, &ctx->ip.s_addr, 1274 sizeof(sin.sin_addr.s_addr)); 1275 ifaddr_del(ctx->ifnam, (struct sockaddr *)&sin); 1276 1277 if_ifdown(ctx->ifnam); 1278 ctx->flags &= ~IPASSIGNED; 1279 } 1280 1281 /* Attempt to reset resolv.conf */ 1282 set_nameservers(ctx, ctx->resolv_path, 0); 1283 } 1284 1285 static void 1286 daemonize(struct ctx *ctx) 1287 { 1288 struct pidfh *pfh; 1289 pid_t opid; 1290 1291 snprintf(ctx->pidfile, 127, PIDFILE, ctx->ifnam); 1292 1293 pfh = pidfile_open(ctx->pidfile, 0600, &opid); 1294 if (pfh == NULL) { 1295 warn("Cannot create pidfile %s", ctx->pidfile); 1296 return; 1297 } 1298 1299 if (daemon(0, 0) == -1) { 1300 warn("Cannot daemonize"); 1301 pidfile_remove(pfh); 1302 return; 1303 } 1304 1305 pidfile_write(pfh); 1306 ctx->pfh = pfh; 1307 ctx->flags |= FLG_DAEMON; 1308 1309 snprintf(syslog_title, 63, "%s:%s", getprogname(), ctx->ifnam); 1310 openlog(syslog_title, LOG_PID, LOG_USER); 1311 syslog_open = 1; 1312 } 1313 1314 static void 1315 send_disconnect(const char *ifnam) 1316 { 1317 char pidfile[128]; 1318 FILE *fp; 1319 pid_t pid; 1320 int n; 1321 1322 snprintf(pidfile, 127, PIDFILE, ifnam); 1323 fp = fopen(pidfile, "r"); 1324 if (fp == NULL) { 1325 warn("Cannot open %s", pidfile); 1326 return; 1327 } 1328 1329 n = fscanf(fp, "%d", &pid); 1330 fclose(fp); 1331 if (n != 1) { 1332 warnx("unable to read daemon pid"); 1333 return; 1334 } 1335 #ifdef DEBUG 1336 fprintf(stderr, "Sending SIGTERM to %d\n", pid); 1337 #endif 1338 kill(pid, SIGTERM); 1339 } 1340 1341 static void 1342 usage(const char *exec) 1343 { 1344 1345 printf("usage %s [-b] [-n] [-a apn] [-c cid] [-p pin] [-u username] " 1346 "[-k password] [-r resolvpath] [-f tty] interface\n", exec); 1347 printf("usage %s -d interface\n", exec); 1348 } 1349 1350 enum { 1351 MODE_CONN, 1352 MODE_DISC 1353 }; 1354 1355 int 1356 main(int argc, char *argv[]) 1357 { 1358 int ch, error, mode; 1359 const char *ifnam = NULL; 1360 char *tty = NULL; 1361 char **p, **tty_list; 1362 fd_set set; 1363 struct ctx ctx; 1364 struct itimerval it; 1365 1366 TAILQ_INIT(&timers.head); 1367 timers.res = 1; 1368 1369 ctx.pdp_ctx = 1; 1370 ctx.pdp_apn = ctx.pdp_user = ctx.pdp_pwd = NULL; 1371 ctx.pin = NULL; 1372 1373 ctx.con_status = 0; 1374 ctx.con_apn = NULL; 1375 ctx.con_oper = NULL; 1376 ctx.con_net_stat = 0; 1377 ctx.con_net_type = -1; 1378 ctx.flags = 0; 1379 ctx.resolv_path = RESOLV_PATH; 1380 ctx.resolv = NULL; 1381 ctx.ns = NULL; 1382 ctx.dbm = 0; 1383 1384 mode = MODE_CONN; 1385 ctx.flags |= FLG_DELAYED; 1386 1387 while ((ch = getopt(argc, argv, "?ha:p:c:u:k:r:f:dbn")) != -1) { 1388 switch (ch) { 1389 case 'a': 1390 ctx.pdp_apn = argv[optind - 1]; 1391 break; 1392 case 'c': 1393 ctx.pdp_ctx = strtol(argv[optind - 1], NULL, 10); 1394 if (ctx.pdp_ctx < 1) { 1395 warnx("Invalid context ID, defaulting to 1"); 1396 ctx.pdp_ctx = 1; 1397 } 1398 break; 1399 case 'p': 1400 ctx.pin = argv[optind - 1]; 1401 break; 1402 case 'u': 1403 ctx.pdp_user = argv[optind - 1]; 1404 break; 1405 case 'k': 1406 ctx.pdp_pwd = argv[optind - 1]; 1407 break; 1408 case 'r': 1409 ctx.resolv_path = argv[optind - 1]; 1410 break; 1411 case 'd': 1412 mode = MODE_DISC; 1413 break; 1414 case 'b': 1415 ctx.flags &= ~FLG_DELAYED; 1416 break; 1417 case 'n': 1418 ctx.flags |= FLG_NODAEMON; 1419 break; 1420 case 'f': 1421 tty = argv[optind - 1]; 1422 break; 1423 case 'h': 1424 case '?': 1425 default: 1426 usage(argv[0]); 1427 exit(EXIT_SUCCESS); 1428 } 1429 } 1430 1431 argc -= optind; 1432 argv += optind; 1433 1434 if (argc < 1) 1435 errx(1, "no interface given"); 1436 1437 ifnam = argv[argc - 1]; 1438 ctx.ifnam = strdup(ifnam); 1439 1440 switch (mode) { 1441 case MODE_DISC: 1442 printf("Disconnecting %s\n", ifnam); 1443 send_disconnect(ifnam); 1444 exit(EXIT_SUCCESS); 1445 default: 1446 break; 1447 } 1448 1449 signal(SIGHUP, sig_handle); 1450 signal(SIGINT, sig_handle); 1451 signal(SIGQUIT, sig_handle); 1452 signal(SIGTERM, sig_handle); 1453 signal(SIGALRM, sig_handle); 1454 1455 it.it_interval.tv_sec = 1; 1456 it.it_interval.tv_usec = 0; 1457 it.it_value.tv_sec = 1; 1458 it.it_value.tv_usec = 0; 1459 error = setitimer(ITIMER_REAL, &it, NULL); 1460 if (error != 0) 1461 errx(1, "setitimer"); 1462 1463 tmr_add(&timers, 1, 5, &tmr_watchdog, &ctx); 1464 watchdog_reset(&ctx, 15); 1465 1466 if (tty != NULL) { 1467 error = do_connect(&ctx, tty); 1468 if (error != 0) 1469 errx(1, "Failed to open %s", tty); 1470 } 1471 else { 1472 tty_list = get_tty(&ctx); 1473 if (tty_list == NULL) 1474 errx(1, "%s does not appear to be a uhso device", ifnam); 1475 #ifdef DEBUG 1476 if (tty_list == NULL) { 1477 fprintf(stderr, "get_tty returned empty list\n"); 1478 } else { 1479 fprintf(stderr, "tty list:\n"); 1480 for (p = tty_list; *p != NULL; p++) { 1481 fprintf(stderr, "\t %s\n", *p); 1482 } 1483 } 1484 #endif 1485 for (p = tty_list; *p != NULL; p++) { 1486 error = do_connect(&ctx, *p); 1487 if (error == 0) { 1488 tty = *p; 1489 break; 1490 } 1491 } 1492 if (*p == NULL) 1493 errx(1, "Failed to obtain a control port, " 1494 "try specifying one manually"); 1495 } 1496 1497 if (!(ctx.flags & FLG_DELAYED) && !(ctx.flags & FLG_NODAEMON)) 1498 daemonize(&ctx); 1499 1500 1501 FD_ZERO(&set); 1502 FD_SET(ctx.fd, &set); 1503 for (;;) { 1504 1505 watchdog_disable(&ctx); 1506 error = select(ctx.fd + 1, &set, NULL, NULL, NULL); 1507 if (error <= 0) { 1508 if (running && errno == EINTR) 1509 continue; 1510 if (ctx.flags & FLG_WDEXP) { 1511 ctx.flags &= ~FLG_WDEXP; 1512 watchdog_reset(&ctx, 5); 1513 do_disconnect(&ctx); 1514 watchdog_reset(&ctx, 15); 1515 do_connect(&ctx, tty); 1516 running = 1; 1517 continue; 1518 } 1519 1520 break; 1521 } 1522 1523 if (FD_ISSET(ctx.fd, &set)) { 1524 watchdog_reset(&ctx, 15); 1525 error = at_async(&ctx, &ctx); 1526 if (error != 0) 1527 break; 1528 } 1529 FD_SET(ctx.fd, &set); 1530 1531 if (!(ctx.flags & FLG_DAEMON) && (ctx.flags & IPASSIGNED)) { 1532 printf("Status: %s (%s)", 1533 ctx.con_status ? "connected" : "disconnected", 1534 network_access_type[ctx.con_net_type]); 1535 if (ctx.dbm < 0) 1536 printf(", signal: %d dBm", ctx.dbm); 1537 printf("\t\t\t\r"); 1538 fflush(stdout); 1539 } 1540 } 1541 if (!(ctx.flags & FLG_DAEMON) && (ctx.flags & IPASSIGNED)) 1542 printf("\n"); 1543 1544 signal(SIGHUP, SIG_DFL); 1545 signal(SIGINT, SIG_DFL); 1546 signal(SIGQUIT, SIG_DFL); 1547 signal(SIGTERM, SIG_DFL); 1548 signal(SIGALRM, SIG_IGN); 1549 1550 do_disconnect(&ctx); 1551 1552 if (ctx.flags & FLG_DAEMON) { 1553 pidfile_remove(ctx.pfh); 1554 if (syslog_open) 1555 closelog(); 1556 } 1557 1558 return (0); 1559 } 1560