usr.bin/tip/libacu/multitech.c

   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  * @(#)multitech.c      8.1 (Berkeley) 6/6/93
  34  * $DragonFly: src/usr.bin/tip/libacu/multitech.c,v 1.3 2005/05/07 23:20:43 corecode Exp $
  35  */
  36
  37 /*
  38  * Routines for calling up on a Courier modem.
  39  * Derived from Hayes driver.
  40  */
  41 #include "tipconf.h"
  42 #include "tip.h"
  43 #include "acucommon.h"
  44
  45 #include <stdio.h>
  46
  47 /* #define DEBUG */
  48 #define MAXRETRY        5
  49 /*
  50         Configuration
  51 */
  52 static CONST char *dial_command = "ATDT";
  53 static CONST char *hangup_command = "ATH\r";
  54 static CONST char *echo_off_command = "ATE0\r";
  55 static CONST char *reset_command = "\rATZ\r";
  56 static CONST char *init_string = "AT$BA0$SB38400&E1&E4&E13&E15Q0V1X4E0S0=0\r";
  57 static CONST char *escape_sequence = "+++"; /* return to command escape sequence */
  58 static CONST int lock_baud = 1;
  59 static CONST unsigned int intercharacter_delay = 20;
  60 static CONST unsigned int intercommand_delay = 250;
  61 static CONST unsigned int escape_guard_time = 250;
  62 static CONST unsigned int reset_delay = 2000;
  63
  64 /*
  65         Forward declarations
  66 */
  67 void multitech_write (int fd, CONST char *cp, int n);
  68 void multitech_write_str (int fd, CONST char *cp);
  69 void multitech_disconnect ();
  70 void acu_nap (unsigned int how_long);
  71 static void sigALRM ();
  72 static int multitechsync ();
  73 static int multitech_swallow (register char *match);
  74 static int multitech_connect(void);
  75
  76 /*
  77         Global vars
  78 */
  79 static int timeout = 0;
  80 static int connected = 0;
  81 static jmp_buf timeoutbuf, intbuf;
  82
  83 int multitech_dialer (register char *num, char *acu)
  84 {
  85         register char *cp;
  86 #if ACULOG
  87         char line [80];
  88 #endif
  89
  90         if (lock_baud)
  91         {
  92                 int i;
  93                 if ((i = speed(number(value(BAUDRATE)))) == 0)
  94                         return 0;
  95                 ttysetup (i);
  96         }
  97
  98         if (boolean(value(VERBOSE)))
  99                 printf("Using \"%s\"\n", acu);
 100
 101         acu_hupcl ();
 102
 103         /*
 104          * Get in synch.
 105          */
 106         if (!multitechsync()) {
 107 badsynch:
 108                 printf("can't synchronize with multitech\n");
 109 #if ACULOG
 110                 logent(value(HOST), num, "multitech", "can't synch up");
 111 #endif
 112                 return (0);
 113         }
 114         acu_nap (intercommand_delay);
 115
 116         multitech_write_str (FD, echo_off_command);     /* turn off echoing */
 117
 118         sleep(1);
 119
 120 #ifdef DEBUG
 121         if (boolean(value(VERBOSE)))
 122                 multitech_verbose_read();
 123 #endif
 124
 125         acu_flush ();
 126
 127         acu_nap (intercommand_delay);
 128         multitech_write_str (FD, init_string);
 129
 130         if (!multitech_swallow ("\r\nOK\r\n"))
 131                 goto badsynch;
 132
 133         fflush (stdout);
 134
 135         acu_nap (intercommand_delay);
 136         multitech_write_str (FD, dial_command);
 137
 138         for (cp = num; *cp; cp++)
 139                 if (*cp == '=')
 140                         *cp = ',';
 141
 142         multitech_write_str (FD, num);
 143
 144         multitech_write_str (FD, "\r");
 145
 146         connected = multitech_connect();
 147
 148 #if ACULOG
 149         if (timeout) {
 150                 sprintf(line, "%d second dial timeout",
 151                         number(value(DIALTIMEOUT)));
 152                 logent(value(HOST), num, "multitech", line);
 153         }
 154 #endif
 155         if (timeout)
 156                 multitech_disconnect ();
 157         return (connected);
 158 }
 159
 160 void multitech_disconnect ()
 161 {
 162         int okay, retries;
 163         for (retries = okay = 0; retries < 3 && !okay; retries++)
 164         {
 165                  /* first hang up the modem*/
 166                 ioctl (FD, TIOCCDTR, 0);
 167                 acu_nap (escape_guard_time);
 168                 ioctl (FD, TIOCSDTR, 0);
 169                 acu_nap (escape_guard_time);
 170                 /*
 171                  * If not strapped for DTR control, try to get command mode.
 172                  */
 173                 acu_nap (escape_guard_time);
 174                 multitech_write_str (FD, escape_sequence);
 175                 acu_nap (escape_guard_time);
 176                 multitech_write_str (FD, hangup_command);
 177                 okay = multitech_swallow ("\r\nOK\r\n");
 178         }
 179         if (!okay)
 180         {
 181                 #if ACULOG
 182                 logent(value(HOST), "", "multitech", "can't hang up modem");
 183                 #endif
 184                 if (boolean(value(VERBOSE)))
 185                         printf("hang up failed\n");
 186         }
 187         close (FD);
 188 }
 189
 190 void multitech_abort ()
 191 {
 192         multitech_write_str (FD, "\r"); /* send anything to abort the call */
 193         multitech_disconnect ();
 194 }
 195
 196 static void sigALRM ()
 197 {
 198         (void) printf("\07timeout waiting for reply\n");
 199         timeout = 1;
 200         longjmp(timeoutbuf, 1);
 201 }
 202
 203 static int multitech_swallow (register char *match)
 204   {
 205         sig_t f;
 206         char c;
 207
 208         f = signal(SIGALRM, sigALRM);
 209         timeout = 0;
 210         do {
 211                 if (*match =='\0') {
 212                         signal(SIGALRM, f);
 213                         return (1);
 214                 }
 215                 if (setjmp(timeoutbuf)) {
 216                         signal(SIGALRM, f);
 217                         return (0);
 218                 }
 219                 alarm(number(value(DIALTIMEOUT)));
 220                 read(FD, &c, 1);
 221                 alarm(0);
 222                 c &= 0177;
 223 #ifdef DEBUG
 224                 if (boolean(value(VERBOSE)))
 225                         putchar(c);
 226 #endif
 227         } while (c == *match++);
 228 #ifdef DEBUG
 229         if (boolean(value(VERBOSE)))
 230                 fflush (stdout);
 231 #endif
 232         signal(SIGALRM, SIG_DFL);
 233         return (0);
 234 }
 235
 236 static struct baud_msg {
 237         char *msg;
 238         int baud;
 239 } baud_msg[] = {
 240         "",             B300,
 241         " 1200",        B1200,
 242         " 2400",        B2400,
 243         " 9600",        B9600,
 244         " 9600/ARQ",    B9600,
 245         0,              0,
 246 };
 247
 248 static int multitech_connect ()
 249 {
 250         char c;
 251         int nc, nl, n;
 252         char dialer_buf[64];
 253         struct baud_msg *bm;
 254         sig_t f;
 255
 256         if (multitech_swallow("\r\n") == 0)
 257                 return (0);
 258         f = signal(SIGALRM, sigALRM);
 259 again:
 260         nc = 0; nl = sizeof(dialer_buf)-1;
 261         bzero(dialer_buf, sizeof(dialer_buf));
 262         timeout = 0;
 263         for (nc = 0, nl = sizeof(dialer_buf)-1 ; nl > 0 ; nc++, nl--) {
 264                 if (setjmp(timeoutbuf))
 265                         break;
 266                 alarm(number(value(DIALTIMEOUT)));
 267                 n = read(FD, &c, 1);
 268                 alarm(0);
 269                 if (n <= 0)
 270                         break;
 271                 c &= 0x7f;
 272                 if (c == '\r') {
 273                         if (multitech_swallow("\n") == 0)
 274                                 break;
 275                         if (!dialer_buf[0])
 276                                 goto again;
 277                         if (strcmp(dialer_buf, "RINGING") == 0 &&
 278                             boolean(value(VERBOSE))) {
 279 #ifdef DEBUG
 280                                 printf("%s\r\n", dialer_buf);
 281 #endif
 282                                 goto again;
 283                         }
 284                         if (strncmp(dialer_buf, "CONNECT",
 285                                     sizeof("CONNECT")-1) != 0)
 286                                 break;
 287                         if (lock_baud) {
 288                                 signal(SIGALRM, f);
 289 #ifdef DEBUG
 290                                 if (boolean(value(VERBOSE)))
 291                                         printf("%s\r\n", dialer_buf);
 292 #endif
 293                                 return (1);
 294                         }
 295                         for (bm = baud_msg ; bm->msg ; bm++)
 296                                 if (strcmp(bm->msg, dialer_buf+sizeof("CONNECT")-1) == 0) {
 297                                         if (!acu_setspeed (bm->baud))
 298                                                 goto error;
 299                                         signal(SIGALRM, f);
 300 #ifdef DEBUG
 301                                         if (boolean(value(VERBOSE)))
 302                                                 printf("%s\r\n", dialer_buf);
 303 #endif
 304                                         return (1);
 305                                 }
 306                         break;
 307                 }
 308                 dialer_buf[nc] = c;
 309         }
 310 error1:
 311         printf("%s\r\n", dialer_buf);
 312 error:
 313         signal(SIGALRM, f);
 314         return (0);
 315 }
 316
 317 /*
 318  * This convoluted piece of code attempts to get
 319  * the multitech in sync.
 320  */
 321 static int multitechsync ()
 322 {
 323         int already = 0;
 324         int len;
 325         char buf[40];
 326
 327         while (already++ < MAXRETRY) {
 328                 acu_nap (intercommand_delay);
 329                 ioctl (FD, TIOCFLUSH, 0);       /* flush any clutter */
 330                 multitech_write_str (FD, reset_command); /* reset modem */
 331                 bzero(buf, sizeof(buf));
 332                 acu_nap (reset_delay);
 333                 ioctl (FD, FIONREAD, &len);
 334                 if (len) {
 335                         len = read(FD, buf, sizeof(buf));
 336 #ifdef DEBUG
 337                         buf [len] = '\0';
 338                         printf("multitechsync: (\"%s\")\n\r", buf);
 339 #endif
 340                         if (index(buf, '0') ||
 341                            (index(buf, 'O') && index(buf, 'K')))
 342                                 return(1);
 343                 }
 344                 /*
 345                  * If not strapped for DTR control,
 346                  * try to get command mode.
 347                  */
 348                 acu_nap (escape_guard_time);
 349                 multitech_write_str (FD, escape_sequence);
 350                 acu_nap (escape_guard_time);
 351                 multitech_write_str (FD, hangup_command);
 352                 /*
 353                  * Toggle DTR to force anyone off that might have left
 354                  * the modem connected.
 355                  */
 356                 acu_nap (escape_guard_time);
 357                 ioctl (FD, TIOCCDTR, 0);
 358                 acu_nap (escape_guard_time);
 359                 ioctl (FD, TIOCSDTR, 0);
 360         }
 361         acu_nap (intercommand_delay);
 362         multitech_write_str (FD, reset_command);
 363         return (0);
 364 }
 365
 366 void multitech_write_str (int fd, const char *cp)
 367 {
 368 #ifdef DEBUG
 369         printf ("multitech: sending %s\n", cp);
 370 #endif
 371         multitech_write (fd, cp, strlen (cp));
 372 }
 373
 374 void multitech_write (int fd, const char *cp, int n)
 375 {
 376         acu_flush ();
 377         acu_nap (intercharacter_delay);
 378         for ( ; n-- ; cp++) {
 379                 write (fd, cp, 1);
 380                 acu_flush ();
 381                 acu_nap (intercharacter_delay);
 382         }
 383 }
 384
 385 #ifdef DEBUG
 386 multitech_verbose_read()
 387 {
 388         int n = 0;
 389         char buf[BUFSIZ];
 390
 391         if (ioctl(FD, FIONREAD, &n) < 0)
 392                 return;
 393         if (n <= 0)
 394                 return;
 395         if (read(FD, buf, n) != n)
 396                 return;
 397         write(1, buf, n);
 398 }
 399 #endif
 400
 401 /* end of multitech.c */