| 1 | /* |
| 2 | * Copyright (c) 1986, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This product includes software developed by the University of |
| 16 | * California, Berkeley and its contributors. |
| 17 | * 4. Neither the name of the University nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | * |
| 33 | * @(#)unidialer.c 8.1 (Berkeley) 6/6/93 |
| 34 | * $FreeBSD: src/usr.bin/tip/libacu/unidialer.c,v 1.7 1999/08/28 01:06:30 peter Exp $ |
| 35 | */ |
| 36 | |
| 37 | /* |
| 38 | * Generalized routines for calling up on a Hayes AT command set based modem. |
| 39 | * Control variables are pulled out of a modem caps-style database to |
| 40 | * configure the driver for a particular modem. |
| 41 | */ |
| 42 | #include "tipconf.h" |
| 43 | #include "tip.h" |
| 44 | #include "pathnames.h" |
| 45 | |
| 46 | #include <sys/times.h> |
| 47 | #include <assert.h> |
| 48 | #include <err.h> |
| 49 | #include <stdio.h> |
| 50 | #include <stdlib.h> |
| 51 | |
| 52 | #include "acucommon.h" |
| 53 | #include "tod.h" |
| 54 | |
| 55 | /* #define DEBUG */ |
| 56 | #define MAXRETRY 5 |
| 57 | |
| 58 | typedef enum |
| 59 | { |
| 60 | mpt_notype, mpt_string, mpt_number, mpt_boolean |
| 61 | } modem_parm_type_t; |
| 62 | |
| 63 | typedef struct { |
| 64 | modem_parm_type_t modem_parm_type; |
| 65 | const char *name; |
| 66 | union { |
| 67 | char **string; |
| 68 | unsigned int *number; |
| 69 | } value; |
| 70 | union { |
| 71 | char *string; |
| 72 | unsigned int number; |
| 73 | } default_value; |
| 74 | } modem_parm_t; |
| 75 | |
| 76 | /* |
| 77 | Configuration |
| 78 | */ |
| 79 | static char modem_name [80]; |
| 80 | static char *dial_command; |
| 81 | static char *hangup_command; |
| 82 | static char *echo_off_command; |
| 83 | static char *reset_command; |
| 84 | static char *init_string; |
| 85 | static char *escape_sequence; |
| 86 | static int hw_flow_control; |
| 87 | static int lock_baud; |
| 88 | static unsigned int intercharacter_delay; |
| 89 | static unsigned int intercommand_delay; |
| 90 | static unsigned int escape_guard_time; |
| 91 | static unsigned int reset_delay; |
| 92 | |
| 93 | static int unidialer_dialer (char *num, char *acu); |
| 94 | static void unidialer_disconnect (); |
| 95 | static void unidialer_abort (); |
| 96 | static int unidialer_connect(void); |
| 97 | static int unidialer_swallow(char *); |
| 98 | |
| 99 | static acu_t unidialer = |
| 100 | { |
| 101 | modem_name, |
| 102 | unidialer_dialer, |
| 103 | unidialer_disconnect, |
| 104 | unidialer_abort |
| 105 | }; |
| 106 | |
| 107 | /* |
| 108 | Table of parameters kept in modem database |
| 109 | */ |
| 110 | modem_parm_t modem_parms [] = { |
| 111 | { mpt_string, "dial_command", &dial_command, "ATDT%s\r" }, |
| 112 | { mpt_string, "hangup_command", &hangup_command, "ATH\r", }, |
| 113 | { mpt_string, "echo_off_command", &echo_off_command, "ATE0\r" }, |
| 114 | { mpt_string, "reset_command", &reset_command, "ATZ\r" }, |
| 115 | { mpt_string, "init_string", &init_string, "AT&F\r", }, |
| 116 | { mpt_string, "escape_sequence", &escape_sequence, "+++" }, |
| 117 | { mpt_boolean, "hw_flow_control", (char **)&hw_flow_control, NULL }, |
| 118 | { mpt_boolean, "lock_baud", (char **)&lock_baud, NULL }, |
| 119 | { mpt_number, "intercharacter_delay", (char **)&intercharacter_delay, (char *)50 }, |
| 120 | { mpt_number, "intercommand_delay", (char **)&intercommand_delay, (char *)300 }, |
| 121 | { mpt_number, "escape_guard_time", (char **)&escape_guard_time, (char *)300 }, |
| 122 | { mpt_number, "reset_delay", (char **)&reset_delay, (char *)3000 }, |
| 123 | { mpt_notype, NULL, NULL, NULL } |
| 124 | }; |
| 125 | |
| 126 | /* |
| 127 | Forward declarations |
| 128 | */ |
| 129 | static void unidialer_verbose_read (); |
| 130 | static void unidialer_modem_cmd (int fd, CONST char *cmd); |
| 131 | static void unidialer_write (int fd, CONST char *cp, int n); |
| 132 | static void unidialer_write_str (int fd, CONST char *cp); |
| 133 | static void unidialer_disconnect (); |
| 134 | static void sigALRM (); |
| 135 | static int unidialersync (); |
| 136 | static int unidialer_swallow (char *match); |
| 137 | |
| 138 | /* |
| 139 | Global vars |
| 140 | */ |
| 141 | static int timeout = 0; |
| 142 | static int connected = 0; |
| 143 | static jmp_buf timeoutbuf, intbuf; |
| 144 | |
| 145 | #define cgetflag(f) (cgetcap(bp, f, ':') != NULL) |
| 146 | |
| 147 | #ifdef DEBUG |
| 148 | |
| 149 | #define print_str(x) printf (#x " = %s\n", x) |
| 150 | #define print_num(x) printf (#x " = %d\n", x) |
| 151 | |
| 152 | void dumpmodemparms (char *modem) |
| 153 | { |
| 154 | printf ("modem parms for %s\n", modem); |
| 155 | print_str (dial_command); |
| 156 | print_str (hangup_command); |
| 157 | print_str (echo_off_command); |
| 158 | print_str (reset_command); |
| 159 | print_str (init_string); |
| 160 | print_str (escape_sequence); |
| 161 | print_num (lock_baud); |
| 162 | print_num (intercharacter_delay); |
| 163 | print_num (intercommand_delay); |
| 164 | print_num (escape_guard_time); |
| 165 | print_num (reset_delay); |
| 166 | printf ("\n"); |
| 167 | } |
| 168 | #endif |
| 169 | |
| 170 | static int getmodemparms (const char *modem) |
| 171 | { |
| 172 | char *bp, *db_array [3], *modempath; |
| 173 | int ndx, stat; |
| 174 | modem_parm_t *mpp; |
| 175 | |
| 176 | modempath = getenv ("MODEMS"); |
| 177 | |
| 178 | ndx = 0; |
| 179 | |
| 180 | if (modempath != NULL) |
| 181 | db_array [ndx++] = modempath; |
| 182 | |
| 183 | db_array [ndx++] = _PATH_MODEMS; |
| 184 | db_array [ndx] = NULL; |
| 185 | |
| 186 | if ((stat = cgetent (&bp, db_array, (char *)modem)) < 0) { |
| 187 | switch (stat) { |
| 188 | case -1: |
| 189 | warnx ("unknown modem %s", modem); |
| 190 | break; |
| 191 | case -2: |
| 192 | warnx ("can't open modem description file"); |
| 193 | break; |
| 194 | case -3: |
| 195 | warnx ("possible reference loop in modem description file"); |
| 196 | break; |
| 197 | } |
| 198 | return 0; |
| 199 | } |
| 200 | for (mpp = modem_parms; mpp->name; mpp++) |
| 201 | { |
| 202 | switch (mpp->modem_parm_type) |
| 203 | { |
| 204 | case mpt_string: |
| 205 | if (cgetstr (bp, (char *)mpp->name, mpp->value.string) == -1) |
| 206 | *mpp->value.string = mpp->default_value.string; |
| 207 | break; |
| 208 | |
| 209 | case mpt_number: |
| 210 | { |
| 211 | long l; |
| 212 | if (cgetnum (bp, (char *)mpp->name, &l) == -1) |
| 213 | *mpp->value.number = mpp->default_value.number; |
| 214 | else |
| 215 | *mpp->value.number = (unsigned int)l; |
| 216 | } |
| 217 | break; |
| 218 | |
| 219 | case mpt_boolean: |
| 220 | *mpp->value.number = cgetflag ((char *)mpp->name); |
| 221 | break; |
| 222 | } |
| 223 | } |
| 224 | strncpy (modem_name, modem, sizeof (modem_name) - 1); |
| 225 | modem_name [sizeof (modem_name) - 1] = '\0'; |
| 226 | return 1; |
| 227 | } |
| 228 | |
| 229 | /* |
| 230 | */ |
| 231 | acu_t* unidialer_getmodem (const char *modem_name) |
| 232 | { |
| 233 | acu_t* rc = NULL; |
| 234 | if (getmodemparms (modem_name)) |
| 235 | rc = &unidialer; |
| 236 | return rc; |
| 237 | } |
| 238 | |
| 239 | static int unidialer_modem_ready () |
| 240 | { |
| 241 | #ifdef TIOCMGET |
| 242 | int state; |
| 243 | ioctl (FD, TIOCMGET, &state); |
| 244 | return (state & TIOCM_DSR) ? 1 : 0; |
| 245 | #else |
| 246 | return (1); |
| 247 | #endif |
| 248 | } |
| 249 | |
| 250 | static int unidialer_waitfor_modem_ready (int ms) |
| 251 | { |
| 252 | #ifdef TIOCMGET |
| 253 | int count; |
| 254 | for (count = 0; count < ms; count += 100) |
| 255 | { |
| 256 | if (unidialer_modem_ready ()) |
| 257 | { |
| 258 | #ifdef DEBUG |
| 259 | printf ("unidialer_waitfor_modem_ready: modem ready.\n"); |
| 260 | #endif |
| 261 | break; |
| 262 | } |
| 263 | acu_nap (100); |
| 264 | } |
| 265 | return (count < ms); |
| 266 | #else |
| 267 | acu_nap (250); |
| 268 | return (1); |
| 269 | #endif |
| 270 | } |
| 271 | |
| 272 | int unidialer_tty_clocal (int flag) |
| 273 | { |
| 274 | #if HAVE_TERMIOS |
| 275 | struct termios t; |
| 276 | tcgetattr (FD, &t); |
| 277 | if (flag) |
| 278 | t.c_cflag |= CLOCAL; |
| 279 | else |
| 280 | t.c_cflag &= ~CLOCAL; |
| 281 | tcsetattr (FD, TCSANOW, &t); |
| 282 | #elif defined(TIOCMSET) |
| 283 | int state; |
| 284 | /* |
| 285 | Don't have CLOCAL so raise CD in software to |
| 286 | get the same effect. |
| 287 | */ |
| 288 | ioctl (FD, TIOCMGET, &state); |
| 289 | if (flag) |
| 290 | state |= TIOCM_CD; |
| 291 | else |
| 292 | state &= ~TIOCM_CD; |
| 293 | ioctl (FD, TIOCMSET, &state); |
| 294 | #endif |
| 295 | } |
| 296 | |
| 297 | int unidialer_get_modem_response (char *buf, int bufsz, int response_timeout) |
| 298 | { |
| 299 | sig_t f; |
| 300 | char c, *p = buf, *lid = buf + bufsz - 1; |
| 301 | int state; |
| 302 | |
| 303 | assert (bufsz > 0); |
| 304 | |
| 305 | f = signal (SIGALRM, sigALRM); |
| 306 | |
| 307 | timeout = 0; |
| 308 | |
| 309 | if (setjmp (timeoutbuf)) { |
| 310 | signal (SIGALRM, f); |
| 311 | *p = '\0'; |
| 312 | #ifdef DEBUG |
| 313 | printf ("get_response: timeout buf=%s, state=%d\n", buf, state); |
| 314 | #endif |
| 315 | return (0); |
| 316 | } |
| 317 | |
| 318 | ualarm (response_timeout * 1000, 0); |
| 319 | |
| 320 | state = 0; |
| 321 | |
| 322 | while (1) |
| 323 | { |
| 324 | switch (state) |
| 325 | { |
| 326 | case 0: |
| 327 | if (read (FD, &c, 1) == 1) |
| 328 | { |
| 329 | if (c == '\r') |
| 330 | { |
| 331 | ++state; |
| 332 | } |
| 333 | else |
| 334 | { |
| 335 | #ifdef DEBUG |
| 336 | printf ("get_response: unexpected char %s.\n", ctrl (c)); |
| 337 | #endif |
| 338 | } |
| 339 | } |
| 340 | break; |
| 341 | |
| 342 | case 1: |
| 343 | if (read (FD, &c, 1) == 1) |
| 344 | { |
| 345 | if (c == '\n') |
| 346 | { |
| 347 | #ifdef DEBUG |
| 348 | printf ("get_response: <CRLF> encountered.\n"); |
| 349 | #endif |
| 350 | ++state; |
| 351 | } |
| 352 | else |
| 353 | { |
| 354 | state = 0; |
| 355 | #ifdef DEBUG |
| 356 | printf ("get_response: unexpected char %s.\n", ctrl (c)); |
| 357 | #endif |
| 358 | } |
| 359 | } |
| 360 | break; |
| 361 | |
| 362 | case 2: |
| 363 | if (read (FD, &c, 1) == 1) |
| 364 | { |
| 365 | if (c == '\r') |
| 366 | ++state; |
| 367 | else if (c >= ' ' && p < lid) |
| 368 | *p++ = c; |
| 369 | } |
| 370 | break; |
| 371 | |
| 372 | case 3: |
| 373 | if (read (FD, &c, 1) == 1) |
| 374 | { |
| 375 | if (c == '\n') |
| 376 | { |
| 377 | signal (SIGALRM, f); |
| 378 | /* ualarm (0, 0); */ |
| 379 | alarm (0); |
| 380 | *p = '\0'; |
| 381 | #ifdef DEBUG |
| 382 | printf ("get_response: %s\n", buf); |
| 383 | #endif |
| 384 | return (1); |
| 385 | } |
| 386 | else |
| 387 | { |
| 388 | state = 0; |
| 389 | p = buf; |
| 390 | } |
| 391 | } |
| 392 | break; |
| 393 | } |
| 394 | } |
| 395 | } |
| 396 | |
| 397 | int unidialer_get_okay (int ms) |
| 398 | { |
| 399 | int okay; |
| 400 | char buf [BUFSIZ]; |
| 401 | okay = unidialer_get_modem_response (buf, sizeof (buf), ms) && |
| 402 | strcmp (buf, "OK") == 0; |
| 403 | return okay; |
| 404 | } |
| 405 | |
| 406 | static int unidialer_dialer (char *num, char *acu) |
| 407 | { |
| 408 | char *cp; |
| 409 | char dial_string [80]; |
| 410 | #if ACULOG |
| 411 | char line [80]; |
| 412 | #endif |
| 413 | |
| 414 | #ifdef DEBUG |
| 415 | dumpmodemparms (modem_name); |
| 416 | #endif |
| 417 | |
| 418 | if (lock_baud) { |
| 419 | int i; |
| 420 | if ((i = speed(number(value(BAUDRATE)))) == 0) |
| 421 | return 0; |
| 422 | ttysetup (i); |
| 423 | } |
| 424 | |
| 425 | if (boolean(value(VERBOSE))) |
| 426 | printf("Using \"%s\"\n", acu); |
| 427 | |
| 428 | acu_hupcl (); |
| 429 | |
| 430 | /* |
| 431 | * Get in synch. |
| 432 | */ |
| 433 | if (!unidialersync()) { |
| 434 | badsynch: |
| 435 | printf("tip: can't synchronize with %s\n", modem_name); |
| 436 | #if ACULOG |
| 437 | logent(value(HOST), num, modem_name, "can't synch up"); |
| 438 | #endif |
| 439 | return (0); |
| 440 | } |
| 441 | |
| 442 | unidialer_modem_cmd (FD, echo_off_command); /* turn off echoing */ |
| 443 | |
| 444 | sleep(1); |
| 445 | |
| 446 | #ifdef DEBUG |
| 447 | if (boolean(value(VERBOSE))) |
| 448 | unidialer_verbose_read(); |
| 449 | #endif |
| 450 | |
| 451 | acu_flush (); /* flush any clutter */ |
| 452 | |
| 453 | unidialer_modem_cmd (FD, init_string); |
| 454 | |
| 455 | if (!unidialer_get_okay (reset_delay)) |
| 456 | goto badsynch; |
| 457 | |
| 458 | fflush (stdout); |
| 459 | |
| 460 | for (cp = num; *cp; cp++) |
| 461 | if (*cp == '=') |
| 462 | *cp = ','; |
| 463 | |
| 464 | (void) sprintf (dial_string, dial_command, num); |
| 465 | |
| 466 | unidialer_modem_cmd (FD, dial_string); |
| 467 | |
| 468 | connected = unidialer_connect (); |
| 469 | |
| 470 | if (connected && hw_flow_control) { |
| 471 | acu_hw_flow_control (hw_flow_control); |
| 472 | } |
| 473 | |
| 474 | #if ACULOG |
| 475 | if (timeout) { |
| 476 | sprintf(line, "%d second dial timeout", |
| 477 | number(value(DIALTIMEOUT))); |
| 478 | logent(value(HOST), num, modem_name, line); |
| 479 | } |
| 480 | #endif |
| 481 | |
| 482 | if (timeout) |
| 483 | unidialer_disconnect (); |
| 484 | |
| 485 | return (connected); |
| 486 | } |
| 487 | |
| 488 | static void unidialer_disconnect () |
| 489 | { |
| 490 | int okay, retries; |
| 491 | |
| 492 | acu_flush (); /* flush any clutter */ |
| 493 | |
| 494 | unidialer_tty_clocal (TRUE); |
| 495 | |
| 496 | /* first hang up the modem*/ |
| 497 | ioctl (FD, TIOCCDTR, 0); |
| 498 | acu_nap (250); |
| 499 | ioctl (FD, TIOCSDTR, 0); |
| 500 | |
| 501 | /* |
| 502 | * If AT&D2, then dropping DTR *should* just hangup the modem. But |
| 503 | * some modems reset anyway; also, the modem may be programmed to reset |
| 504 | * anyway with AT&D3. Play it safe and wait for the full reset time before |
| 505 | * proceeding. |
| 506 | */ |
| 507 | acu_nap (reset_delay); |
| 508 | |
| 509 | if (!unidialer_waitfor_modem_ready (reset_delay)) |
| 510 | { |
| 511 | #ifdef DEBUG |
| 512 | printf ("unidialer_disconnect: warning CTS low.\r\n"); |
| 513 | #endif |
| 514 | } |
| 515 | |
| 516 | /* |
| 517 | * If not strapped for DTR control, try to get command mode. |
| 518 | */ |
| 519 | for (retries = okay = 0; retries < MAXRETRY && !okay; retries++) |
| 520 | { |
| 521 | int timeout_value; |
| 522 | /* flush any clutter */ |
| 523 | if (!acu_flush ()) |
| 524 | { |
| 525 | #ifdef DEBUG |
| 526 | printf ("unidialer_disconnect: warning flush failed.\r\n"); |
| 527 | #endif |
| 528 | } |
| 529 | timeout_value = escape_guard_time; |
| 530 | timeout_value += (timeout_value * retries / MAXRETRY); |
| 531 | acu_nap (timeout_value); |
| 532 | acu_flush (); /* flush any clutter */ |
| 533 | unidialer_modem_cmd (FD, escape_sequence); |
| 534 | acu_nap (timeout_value); |
| 535 | unidialer_modem_cmd (FD, hangup_command); |
| 536 | okay = unidialer_get_okay (reset_delay); |
| 537 | } |
| 538 | if (!okay) |
| 539 | { |
| 540 | #if ACULOG |
| 541 | logent(value(HOST), "", modem_name, "can't hang up modem"); |
| 542 | #endif |
| 543 | if (boolean(value(VERBOSE))) |
| 544 | printf("hang up failed\n"); |
| 545 | } |
| 546 | (void) acu_flush (); |
| 547 | close (FD); |
| 548 | } |
| 549 | |
| 550 | static void unidialer_abort () |
| 551 | { |
| 552 | unidialer_write_str (FD, "\r"); /* send anything to abort the call */ |
| 553 | unidialer_disconnect (); |
| 554 | } |
| 555 | |
| 556 | static void sigALRM () |
| 557 | { |
| 558 | (void) printf("\07timeout waiting for reply\n"); |
| 559 | timeout = 1; |
| 560 | longjmp(timeoutbuf, 1); |
| 561 | } |
| 562 | |
| 563 | static int unidialer_swallow (char *match) |
| 564 | { |
| 565 | sig_t f; |
| 566 | char c; |
| 567 | |
| 568 | f = signal(SIGALRM, sigALRM); |
| 569 | |
| 570 | timeout = 0; |
| 571 | |
| 572 | if (setjmp(timeoutbuf)) { |
| 573 | signal(SIGALRM, f); |
| 574 | return (0); |
| 575 | } |
| 576 | |
| 577 | alarm(number(value(DIALTIMEOUT))); |
| 578 | |
| 579 | do { |
| 580 | if (*match =='\0') { |
| 581 | signal(SIGALRM, f); |
| 582 | alarm (0); |
| 583 | return (1); |
| 584 | } |
| 585 | do { |
| 586 | read (FD, &c, 1); |
| 587 | } while (c == '\0'); |
| 588 | c &= 0177; |
| 589 | #ifdef DEBUG |
| 590 | if (boolean(value(VERBOSE))) |
| 591 | { |
| 592 | /* putchar(c); */ |
| 593 | printf (ctrl (c)); |
| 594 | } |
| 595 | #endif |
| 596 | } while (c == *match++); |
| 597 | signal(SIGALRM, SIG_DFL); |
| 598 | alarm(0); |
| 599 | #ifdef DEBUG |
| 600 | if (boolean(value(VERBOSE))) |
| 601 | fflush (stdout); |
| 602 | #endif |
| 603 | return (0); |
| 604 | } |
| 605 | |
| 606 | static struct baud_msg { |
| 607 | char *msg; |
| 608 | int baud; |
| 609 | } baud_msg[] = { |
| 610 | "", B300, |
| 611 | " 1200", B1200, |
| 612 | " 2400", B2400, |
| 613 | " 9600", B9600, |
| 614 | " 9600/ARQ", B9600, |
| 615 | 0, 0, |
| 616 | }; |
| 617 | |
| 618 | static int unidialer_connect () |
| 619 | { |
| 620 | char c; |
| 621 | int nc, nl, n; |
| 622 | char dialer_buf[64]; |
| 623 | struct baud_msg *bm; |
| 624 | sig_t f; |
| 625 | |
| 626 | if (unidialer_swallow("\r\n") == 0) |
| 627 | return (0); |
| 628 | f = signal(SIGALRM, sigALRM); |
| 629 | again: |
| 630 | nc = 0; nl = sizeof(dialer_buf)-1; |
| 631 | bzero(dialer_buf, sizeof(dialer_buf)); |
| 632 | timeout = 0; |
| 633 | for (nc = 0, nl = sizeof(dialer_buf)-1 ; nl > 0 ; nc++, nl--) { |
| 634 | if (setjmp(timeoutbuf)) |
| 635 | break; |
| 636 | alarm(number(value(DIALTIMEOUT))); |
| 637 | n = read(FD, &c, 1); |
| 638 | alarm(0); |
| 639 | if (n <= 0) |
| 640 | break; |
| 641 | c &= 0x7f; |
| 642 | if (c == '\r') { |
| 643 | if (unidialer_swallow("\n") == 0) |
| 644 | break; |
| 645 | if (!dialer_buf[0]) |
| 646 | goto again; |
| 647 | if (strcmp(dialer_buf, "RINGING") == 0 && |
| 648 | boolean(value(VERBOSE))) { |
| 649 | #ifdef DEBUG |
| 650 | printf("%s\r\n", dialer_buf); |
| 651 | #endif |
| 652 | goto again; |
| 653 | } |
| 654 | if (strncmp(dialer_buf, "CONNECT", |
| 655 | sizeof("CONNECT")-1) != 0) |
| 656 | break; |
| 657 | if (lock_baud) { |
| 658 | signal(SIGALRM, f); |
| 659 | #ifdef DEBUG |
| 660 | if (boolean(value(VERBOSE))) |
| 661 | printf("%s\r\n", dialer_buf); |
| 662 | #endif |
| 663 | return (1); |
| 664 | } |
| 665 | for (bm = baud_msg ; bm->msg ; bm++) |
| 666 | if (strcmp(bm->msg, dialer_buf+sizeof("CONNECT")-1) == 0) { |
| 667 | if (!acu_setspeed (bm->baud)) |
| 668 | goto error; |
| 669 | signal(SIGALRM, f); |
| 670 | #ifdef DEBUG |
| 671 | if (boolean(value(VERBOSE))) |
| 672 | printf("%s\r\n", dialer_buf); |
| 673 | #endif |
| 674 | return (1); |
| 675 | } |
| 676 | break; |
| 677 | } |
| 678 | dialer_buf[nc] = c; |
| 679 | } |
| 680 | error1: |
| 681 | printf("%s\r\n", dialer_buf); |
| 682 | error: |
| 683 | signal(SIGALRM, f); |
| 684 | return (0); |
| 685 | } |
| 686 | |
| 687 | /* |
| 688 | * This convoluted piece of code attempts to get |
| 689 | * the unidialer in sync. |
| 690 | */ |
| 691 | static int unidialersync () |
| 692 | { |
| 693 | int already = 0; |
| 694 | int len; |
| 695 | char buf[40]; |
| 696 | |
| 697 | while (already++ < MAXRETRY) { |
| 698 | acu_nap (intercommand_delay); |
| 699 | acu_flush (); /* flush any clutter */ |
| 700 | unidialer_write_str (FD, reset_command); /* reset modem */ |
| 701 | bzero(buf, sizeof(buf)); |
| 702 | acu_nap (reset_delay); |
| 703 | ioctl (FD, FIONREAD, &len); |
| 704 | if (len) { |
| 705 | len = read(FD, buf, sizeof(buf)); |
| 706 | #ifdef DEBUG |
| 707 | buf [len] = '\0'; |
| 708 | printf("unidialersync (%s): (\"%s\")\n\r", modem_name, buf); |
| 709 | #endif |
| 710 | if (index(buf, '0') || |
| 711 | (index(buf, 'O') && index(buf, 'K'))) |
| 712 | return(1); |
| 713 | } |
| 714 | /* |
| 715 | * If not strapped for DTR control, |
| 716 | * try to get command mode. |
| 717 | */ |
| 718 | acu_nap (escape_guard_time); |
| 719 | unidialer_write_str (FD, escape_sequence); |
| 720 | acu_nap (escape_guard_time); |
| 721 | unidialer_write_str (FD, hangup_command); |
| 722 | /* |
| 723 | * Toggle DTR to force anyone off that might have left |
| 724 | * the modem connected. |
| 725 | */ |
| 726 | acu_nap (escape_guard_time); |
| 727 | ioctl (FD, TIOCCDTR, 0); |
| 728 | acu_nap (1000); |
| 729 | ioctl (FD, TIOCSDTR, 0); |
| 730 | } |
| 731 | acu_nap (intercommand_delay); |
| 732 | unidialer_write_str (FD, reset_command); |
| 733 | return (0); |
| 734 | } |
| 735 | |
| 736 | /* |
| 737 | Send commands to modem; impose delay between commands. |
| 738 | */ |
| 739 | static void unidialer_modem_cmd (int fd, const char *cmd) |
| 740 | { |
| 741 | static struct timeval oldt = { 0, 0 }; |
| 742 | struct timeval newt; |
| 743 | tod_gettime (&newt); |
| 744 | if (tod_lt (&newt, &oldt)) |
| 745 | { |
| 746 | unsigned int naptime; |
| 747 | tod_subfrom (&oldt, newt); |
| 748 | naptime = oldt.tv_sec * 1000 + oldt.tv_usec / 1000; |
| 749 | if (naptime > intercommand_delay) |
| 750 | { |
| 751 | #ifdef DEBUG |
| 752 | printf ("unidialer_modem_cmd: suspicious naptime (%u ms)\r\n", naptime); |
| 753 | #endif |
| 754 | naptime = intercommand_delay; |
| 755 | } |
| 756 | #ifdef DEBUG |
| 757 | printf ("unidialer_modem_cmd: delaying %u ms\r\n", naptime); |
| 758 | #endif |
| 759 | acu_nap (naptime); |
| 760 | } |
| 761 | unidialer_write_str (fd, cmd); |
| 762 | tod_gettime (&oldt); |
| 763 | newt.tv_sec = 0; |
| 764 | newt.tv_usec = intercommand_delay; |
| 765 | tod_addto (&oldt, &newt); |
| 766 | } |
| 767 | |
| 768 | static void unidialer_write_str (int fd, const char *cp) |
| 769 | { |
| 770 | #ifdef DEBUG |
| 771 | printf ("unidialer (%s): sending %s\n", modem_name, cp); |
| 772 | #endif |
| 773 | unidialer_write (fd, cp, strlen (cp)); |
| 774 | } |
| 775 | |
| 776 | static void unidialer_write (int fd, const char *cp, int n) |
| 777 | { |
| 778 | acu_nap (intercharacter_delay); |
| 779 | for ( ; n-- ; cp++) { |
| 780 | write (fd, cp, 1); |
| 781 | acu_nap (intercharacter_delay); |
| 782 | } |
| 783 | } |
| 784 | |
| 785 | #ifdef DEBUG |
| 786 | static void unidialer_verbose_read() |
| 787 | { |
| 788 | int n = 0; |
| 789 | char buf[BUFSIZ]; |
| 790 | |
| 791 | if (ioctl(FD, FIONREAD, &n) < 0) |
| 792 | return; |
| 793 | if (n <= 0) |
| 794 | return; |
| 795 | if (read(FD, buf, n) != n) |
| 796 | return; |
| 797 | write(1, buf, n); |
| 798 | } |
| 799 | #endif |
| 800 | |
| 801 | /* end of unidialer.c */ |