usr.bin/tip/libacu/t3000.c

   1 /*      $OpenBSD: t3000.c,v 1.14 2006/03/17 19:17:13 moritz Exp $       */
   2 /*      $NetBSD: t3000.c,v 1.5 1997/02/11 09:24:18 mrg Exp $    */
   3
   4 /*-
   5  * SPDX-License-Identifier: BSD-3-Clause
   6  *
   7  * Copyright (c) 1992, 1993
   8  *      The Regents of the University of California.  All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 __FBSDID("$FreeBSD$");
  37
  38 #ifndef lint
  39 #if 0
  40 static char sccsid[] = "@(#)t3000.c     8.1 (Berkeley) 6/6/93";
  41 static const char rcsid[] = "$OpenBSD: t3000.c,v 1.14 2006/03/17 19:17:13 moritz Exp $";
  42 #endif
  43 #endif /* not lint */
  44
  45 /*
  46  * Routines for calling up on a Telebit T3000 modem.
  47  * Derived from Courier driver.
  48  */
  49 #include "tip.h"
  50
  51 #include <sys/ioctl.h>
  52 #include <stdio.h>
  53
  54 #define MAXRETRY        5
  55
  56 static  int dialtimeout = 0;
  57 static  int connected = 0;
  58 static  jmp_buf timeoutbuf;
  59
  60 static void     sigALRM(int);
  61 static int      t3000_swallow(char *);
  62 static int      t3000_connect(void);
  63 static int      t3000_sync(void);
  64 static void     t3000_write(int, char *, int);
  65 static void     t3000_nap(void);
  66 #ifdef DEBUG
  67 static void     t3000_verbose_read(void);
  68 #endif
  69
  70 int
  71 t3000_dialer(char *num, char *acu)
  72 {
  73         char *cp;
  74         struct termios cntrl;
  75 #ifdef ACULOG
  76         char line[80];
  77 #endif
  78
  79         if (boolean(value(VERBOSE)))
  80                 printf("Using \"%s\"\n", acu);
  81
  82         tcgetattr(FD, &cntrl);
  83         cntrl.c_cflag |= HUPCL;
  84         tcsetattr(FD, TCSANOW, &cntrl);
  85         /*
  86          * Get in synch.
  87          */
  88         if (!t3000_sync()) {
  89 badsynch:
  90                 printf("can't synchronize with t3000\n");
  91 #ifdef ACULOG
  92                 logent(value(HOST), num, "t3000", "can't synch up");
  93 #endif
  94                 return (0);
  95         }
  96         t3000_write(FD, "AT E0\r", 6);  /* turn off echoing */
  97         sleep(1);
  98 #ifdef DEBUG
  99         if (boolean(value(VERBOSE)))
 100                 t3000_verbose_read();
 101 #endif
 102         tcflush(FD, TCIOFLUSH);
 103         t3000_write(FD, "AT E0 H0 Q0 X4 V1\r", 18);
 104         if (!t3000_swallow("\r\nOK\r\n"))
 105                 goto badsynch;
 106         fflush(stdout);
 107         t3000_write(FD, "AT D", 4);
 108         for (cp = num; *cp; cp++)
 109                 if (*cp == '=')
 110                         *cp = ',';
 111         t3000_write(FD, num, strlen(num));
 112         t3000_write(FD, "\r", 1);
 113         connected = t3000_connect();
 114 #ifdef ACULOG
 115         if (dialtimeout) {
 116                 (void)snprintf(line, sizeof line, "%ld second dial timeout",
 117                         number(value(DIALTIMEOUT)));
 118                 logent(value(HOST), num, "t3000", line);
 119         }
 120 #endif
 121         if (dialtimeout)
 122                 t3000_disconnect();
 123         return (connected);
 124 }
 125
 126 void
 127 t3000_disconnect(void)
 128 {
 129          /* first hang up the modem*/
 130         ioctl(FD, TIOCCDTR, 0);
 131         sleep(1);
 132         ioctl(FD, TIOCSDTR, 0);
 133         t3000_sync();                           /* reset */
 134         close(FD);
 135 }
 136
 137 void
 138 t3000_abort(void)
 139 {
 140         t3000_write(FD, "\r", 1);       /* send anything to abort the call */
 141         t3000_disconnect();
 142 }
 143
 144 /*ARGSUSED*/
 145 static void
 146 sigALRM(int signo)
 147 {
 148         printf("\07timeout waiting for reply\n");
 149         dialtimeout = 1;
 150         longjmp(timeoutbuf, 1);
 151 }
 152
 153 static int
 154 t3000_swallow(char *match)
 155 {
 156         sig_t f;
 157         char c;
 158
 159         f = signal(SIGALRM, sigALRM);
 160         dialtimeout = 0;
 161         do {
 162                 if (*match =='\0') {
 163                         signal(SIGALRM, f);
 164                         return (1);
 165                 }
 166                 if (setjmp(timeoutbuf)) {
 167                         signal(SIGALRM, f);
 168                         return (0);
 169                 }
 170                 alarm(number(value(DIALTIMEOUT)));
 171                 read(FD, &c, 1);
 172                 alarm(0);
 173                 c &= 0177;
 174 #ifdef DEBUG
 175                 if (boolean(value(VERBOSE)))
 176                         putchar(c);
 177 #endif
 178         } while (c == *match++);
 179 #ifdef DEBUG
 180         if (boolean(value(VERBOSE)))
 181                 fflush(stdout);
 182 #endif
 183         signal(SIGALRM, SIG_DFL);
 184         return (0);
 185 }
 186
 187 #ifndef B19200          /* XXX */
 188 #define B19200  EXTA
 189 #define B38400  EXTB
 190 #endif
 191
 192 struct tbaud_msg {
 193         char *msg;
 194         int baud;
 195         int baud2;
 196 } tbaud_msg[] = {
 197         { "",           B300,   0 },
 198         { " 1200",      B1200,  0 },
 199         { " 2400",      B2400,  0 },
 200         { " 4800",      B4800,  0 },
 201         { " 9600",      B9600,  0 },
 202         { " 14400",     B19200, B9600 },
 203         { " 19200",     B19200, B9600 },
 204         { " 38400",     B38400, B9600 },
 205         { " 57600",     B38400, B9600 },
 206         { " 7512",      B9600,  0 },
 207         { " 1275",      B2400,  0 },
 208         { " 7200",      B9600,  0 },
 209         { " 12000",     B19200, B9600 },
 210         { 0,            0,      0 },
 211 };
 212
 213 static int
 214 t3000_connect(void)
 215 {
 216         char c;
 217         int nc, nl, n;
 218         char dialer_buf[64];
 219         struct tbaud_msg *bm;
 220         sig_t f;
 221
 222         if (t3000_swallow("\r\n") == 0)
 223                 return (0);
 224         f = signal(SIGALRM, sigALRM);
 225 again:
 226         nc = 0; nl = sizeof(dialer_buf)-1;
 227         bzero(dialer_buf, sizeof(dialer_buf));
 228         dialtimeout = 0;
 229         for (nc = 0, nl = sizeof(dialer_buf)-1 ; nl > 0 ; nc++, nl--) {
 230                 if (setjmp(timeoutbuf))
 231                         break;
 232                 alarm(number(value(DIALTIMEOUT)));
 233                 n = read(FD, &c, 1);
 234                 alarm(0);
 235                 if (n <= 0)
 236                         break;
 237                 c &= 0x7f;
 238                 if (c == '\r') {
 239                         if (t3000_swallow("\n") == 0)
 240                                 break;
 241                         if (!dialer_buf[0])
 242                                 goto again;
 243                         if (strcmp(dialer_buf, "RINGING") == 0 &&
 244                             boolean(value(VERBOSE))) {
 245 #ifdef DEBUG
 246                                 printf("%s\r\n", dialer_buf);
 247 #endif
 248                                 goto again;
 249                         }
 250                         if (strncmp(dialer_buf, "CONNECT",
 251                                     sizeof("CONNECT")-1) != 0)
 252                                 break;
 253                         for (bm = tbaud_msg ; bm->msg ; bm++)
 254                                 if (strcmp(bm->msg,
 255                                     dialer_buf+sizeof("CONNECT")-1) == 0) {
 256                                         struct termios  cntrl;
 257
 258                                         tcgetattr(FD, &cntrl);
 259                                         cfsetospeed(&cntrl, bm->baud);
 260                                         cfsetispeed(&cntrl, bm->baud);
 261                                         tcsetattr(FD, TCSAFLUSH, &cntrl);
 262                                         signal(SIGALRM, f);
 263 #ifdef DEBUG
 264                                         if (boolean(value(VERBOSE)))
 265                                                 printf("%s\r\n", dialer_buf);
 266 #endif
 267                                         return (1);
 268                                 }
 269                         break;
 270                 }
 271                 dialer_buf[nc] = c;
 272 #ifdef notdef
 273                 if (boolean(value(VERBOSE)))
 274                         putchar(c);
 275 #endif
 276         }
 277         printf("%s\r\n", dialer_buf);
 278         signal(SIGALRM, f);
 279         return (0);
 280 }
 281
 282 /*
 283  * This convoluted piece of code attempts to get
 284  * the t3000 in sync.
 285  */
 286 static int
 287 t3000_sync(void)
 288 {
 289         int already = 0;
 290         int len;
 291         char buf[40];
 292
 293         while (already++ < MAXRETRY) {
 294                 tcflush(FD, TCIOFLUSH);
 295                 t3000_write(FD, "\rAT Z\r", 6); /* reset modem */
 296                 bzero(buf, sizeof(buf));
 297                 sleep(2);
 298                 ioctl(FD, FIONREAD, &len);
 299 #if 1
 300 if (len == 0) len = 1;
 301 #endif
 302                 if (len) {
 303                         len = read(FD, buf, sizeof(buf));
 304 #ifdef DEBUG
 305                         buf[len] = '\0';
 306                         printf("t3000_sync: (\"%s\")\n\r", buf);
 307 #endif
 308                         if (strchr(buf, '0') ||
 309                            (strchr(buf, 'O') && strchr(buf, 'K')))
 310                                 return(1);
 311                 }
 312                 /*
 313                  * If not strapped for DTR control,
 314                  * try to get command mode.
 315                  */
 316                 sleep(1);
 317                 t3000_write(FD, "+++", 3);
 318                 sleep(1);
 319                 /*
 320                  * Toggle DTR to force anyone off that might have left
 321                  * the modem connected.
 322                  */
 323                 ioctl(FD, TIOCCDTR, 0);
 324                 sleep(1);
 325                 ioctl(FD, TIOCSDTR, 0);
 326         }
 327         t3000_write(FD, "\rAT Z\r", 6);
 328         return (0);
 329 }
 330
 331 static void
 332 t3000_write(int fd, char *cp, int n)
 333 {
 334 #ifdef notdef
 335         if (boolean(value(VERBOSE)))
 336                 write(1, cp, n);
 337 #endif
 338         tcdrain(fd);
 339         t3000_nap();
 340         for ( ; n-- ; cp++) {
 341                 write(fd, cp, 1);
 342                 tcdrain(fd);
 343                 t3000_nap();
 344         }
 345 }
 346
 347 #ifdef DEBUG
 348 static void
 349 t3000_verbose_read(void)
 350 {
 351         int n = 0;
 352         char buf[BUFSIZ];
 353
 354         if (ioctl(FD, FIONREAD, &n) < 0)
 355                 return;
 356         if (n <= 0)
 357                 return;
 358         if (read(FD, buf, n) != n)
 359                 return;
 360         write(1, buf, n);
 361 }
 362 #endif
 363
 364 /* Give the t3000 50 milliseconds between characters */
 365 static void
 366 t3000_nap(void)
 367 {
 368         struct timespec ts;
 369
 370         ts.tv_sec = 0;
 371         ts.tv_nsec = 50 * 1000000;
 372
 373         nanosleep(&ts, NULL);
 374 }