usr.bin/tip/libacu/t3000.c

   1 /*
   2  * Copyright (c) 1992, 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
  34 #ifndef lint
  35 static char sccsid[] = "@(#)t3000.c     8.1 (Berkeley) 6/6/93";
  36 #endif /* not lint */
  37
  38 /*
  39  * Routines for calling up on a Telebit T3000 modem.
  40  * Derived from Courier driver.
  41  */
  42 #include "tipconf.h"
  43 #include "tip.h"
  44 #include "acucommon.h"
  45 #include <stdio.h>
  46
  47 #define MAXRETRY        5
  48
  49 static  void sigALRM();
  50 static  int timeout = 0;
  51 static  int connected = 0;
  52 static  jmp_buf timeoutbuf, intbuf;
  53 static  int t3000_sync();
  54
  55 t3000_dialer(num, acu)
  56         register char *num;
  57         char *acu;
  58 {
  59         register char *cp;
  60 #if ACULOG
  61         char line[80];
  62 #endif
  63         static int t3000_connect(), t3000_swallow();
  64
  65         if (boolean(value(VERBOSE)))
  66                 printf("Using \"%s\"\n", acu);
  67
  68         acu_hupcl ();
  69         /*
  70          * Get in synch.
  71          */
  72         if (!t3000_sync()) {
  73 badsynch:
  74                 printf("can't synchronize with t3000\n");
  75 #if ACULOG
  76                 logent(value(HOST), num, "t3000", "can't synch up");
  77 #endif
  78                 return (0);
  79         }
  80         t3000_write(FD, "AT E0\r", 6);  /* turn off echoing */
  81         sleep(1);
  82 #ifdef DEBUG
  83         if (boolean(value(VERBOSE)))
  84                 t3000_verbose_read();
  85 #endif
  86         ioctl(FD, TIOCFLUSH, 0);        /* flush any clutter */
  87         t3000_write(FD, "AT E0 H0 Q0 X4 V1\r", 18);
  88         if (!t3000_swallow("\r\nOK\r\n"))
  89                 goto badsynch;
  90         fflush(stdout);
  91         t3000_write(FD, "AT D", 4);
  92         for (cp = num; *cp; cp++)
  93                 if (*cp == '=')
  94                         *cp = ',';
  95         t3000_write(FD, num, strlen(num));
  96         t3000_write(FD, "\r", 1);
  97         connected = t3000_connect();
  98 #if ACULOG
  99         if (timeout) {
 100                 sprintf(line, "%d second dial timeout",
 101                         number(value(DIALTIMEOUT)));
 102                 logent(value(HOST), num, "t3000", line);
 103         }
 104 #endif
 105         if (timeout)
 106                 t3000_disconnect();
 107         return (connected);
 108 }
 109
 110 t3000_disconnect()
 111 {
 112          /* first hang up the modem*/
 113         ioctl(FD, TIOCCDTR, 0);
 114         sleep(1);
 115         ioctl(FD, TIOCSDTR, 0);
 116         t3000_sync();                           /* reset */
 117         close(FD);
 118 }
 119
 120 t3000_abort()
 121 {
 122         t3000_write(FD, "\r", 1);       /* send anything to abort the call */
 123         t3000_disconnect();
 124 }
 125
 126 static void
 127 sigALRM()
 128 {
 129         printf("\07timeout waiting for reply\n");
 130         timeout = 1;
 131         longjmp(timeoutbuf, 1);
 132 }
 133
 134 static int
 135 t3000_swallow(match)
 136   register char *match;
 137   {
 138         sig_t f;
 139         char c;
 140
 141         f = signal(SIGALRM, sigALRM);
 142         timeout = 0;
 143         do {
 144                 if (*match =='\0') {
 145                         signal(SIGALRM, f);
 146                         return (1);
 147                 }
 148                 if (setjmp(timeoutbuf)) {
 149                         signal(SIGALRM, f);
 150                         return (0);
 151                 }
 152                 alarm(number(value(DIALTIMEOUT)));
 153                 read(FD, &c, 1);
 154                 alarm(0);
 155                 c &= 0177;
 156 #ifdef DEBUG
 157                 if (boolean(value(VERBOSE)))
 158                         putchar(c);
 159 #endif
 160         } while (c == *match++);
 161 #ifdef DEBUG
 162         if (boolean(value(VERBOSE)))
 163                 fflush(stdout);
 164 #endif
 165         signal(SIGALRM, SIG_DFL);
 166         return (0);
 167 }
 168
 169 #ifndef B19200          /* XXX */
 170 #define B19200  EXTA
 171 #define B38400  EXTB
 172 #endif
 173
 174 struct tbaud_msg {
 175         char *msg;
 176         int baud;
 177         int baud2;
 178 } tbaud_msg[] = {
 179         "",             B300,   0,
 180         " 1200",        B1200,  0,
 181         " 2400",        B2400,  0,
 182         " 4800",        B4800,  0,
 183         " 9600",        B9600,  0,
 184         " 14400",       B19200, B9600,
 185         " 19200",       B19200, B9600,
 186         " 38400",       B38400, B9600,
 187         " 57600",       B38400, B9600,
 188         " 7512",        B9600,  0,
 189         " 1275",        B2400,  0,
 190         " 7200",        B9600,  0,
 191         " 12000",       B19200, B9600,
 192         0,              0,      0,
 193 };
 194
 195 static int
 196 t3000_connect()
 197 {
 198         char c;
 199         int nc, nl, n;
 200         char dialer_buf[64];
 201         struct tbaud_msg *bm;
 202         sig_t f;
 203
 204         if (t3000_swallow("\r\n") == 0)
 205                 return (0);
 206         f = signal(SIGALRM, sigALRM);
 207 again:
 208         nc = 0; nl = sizeof(dialer_buf)-1;
 209         bzero(dialer_buf, sizeof(dialer_buf));
 210         timeout = 0;
 211         for (nc = 0, nl = sizeof(dialer_buf)-1 ; nl > 0 ; nc++, nl--) {
 212                 if (setjmp(timeoutbuf))
 213                         break;
 214                 alarm(number(value(DIALTIMEOUT)));
 215                 n = read(FD, &c, 1);
 216                 alarm(0);
 217                 if (n <= 0)
 218                         break;
 219                 c &= 0x7f;
 220                 if (c == '\r') {
 221                         if (t3000_swallow("\n") == 0)
 222                                 break;
 223                         if (!dialer_buf[0])
 224                                 goto again;
 225                         if (strcmp(dialer_buf, "RINGING") == 0 &&
 226                             boolean(value(VERBOSE))) {
 227 #ifdef DEBUG
 228                                 printf("%s\r\n", dialer_buf);
 229 #endif
 230                                 goto again;
 231                         }
 232                         if (strncmp(dialer_buf, "CONNECT",
 233                                     sizeof("CONNECT")-1) != 0)
 234                                 break;
 235                         for (bm = tbaud_msg ; bm->msg ; bm++)
 236                                 if (strcmp(bm->msg,
 237                                     dialer_buf+sizeof("CONNECT")-1) == 0) {
 238                                         if (!(acu_setspeed (bm->baud) || (bm->baud2 && acu_setspeed (bm->baud2))))
 239                                                 goto error;
 240                                         signal(SIGALRM, f);
 241 #ifdef DEBUG
 242                                         if (boolean(value(VERBOSE)))
 243                                                 printf("%s\r\n", dialer_buf);
 244 #endif
 245                                         return (1);
 246                                 }
 247                         break;
 248                 }
 249                 dialer_buf[nc] = c;
 250 #ifdef notdef
 251                 if (boolean(value(VERBOSE)))
 252                         putchar(c);
 253 #endif
 254         }
 255 error1:
 256         printf("%s\r\n", dialer_buf);
 257 error:
 258         signal(SIGALRM, f);
 259         return (0);
 260 }
 261
 262 /*
 263  * This convoluted piece of code attempts to get
 264  * the t3000 in sync.
 265  */
 266 static int
 267 t3000_sync()
 268 {
 269         int already = 0;
 270         int len;
 271         char buf[40];
 272
 273         while (already++ < MAXRETRY) {
 274                 ioctl(FD, TIOCFLUSH, 0);        /* flush any clutter */
 275                 t3000_write(FD, "\rAT Z\r", 6); /* reset modem */
 276                 bzero(buf, sizeof(buf));
 277                 sleep(2);
 278                 ioctl(FD, FIONREAD, &len);
 279 #if 1
 280 if (len == 0) len = 1;
 281 #endif
 282                 if (len) {
 283                         len = read(FD, buf, sizeof(buf));
 284 #ifdef DEBUG
 285                         buf[len] = '\0';
 286                         printf("t3000_sync: (\"%s\")\n\r", buf);
 287 #endif
 288                         if (index(buf, '0') ||
 289                            (index(buf, 'O') && index(buf, 'K')))
 290                                 return(1);
 291                 }
 292                 /*
 293                  * If not strapped for DTR control,
 294                  * try to get command mode.
 295                  */
 296                 sleep(1);
 297                 t3000_write(FD, "+++", 3);
 298                 sleep(1);
 299                 /*
 300                  * Toggle DTR to force anyone off that might have left
 301                  * the modem connected.
 302                  */
 303                 ioctl(FD, TIOCCDTR, 0);
 304                 sleep(1);
 305                 ioctl(FD, TIOCSDTR, 0);
 306         }
 307         t3000_write(FD, "\rAT Z\r", 6);
 308         return (0);
 309 }
 310
 311 t3000_write(fd, cp, n)
 312 int fd;
 313 char *cp;
 314 int n;
 315 {
 316 #ifdef notdef
 317         if (boolean(value(VERBOSE)))
 318                 write(1, cp, n);
 319 #endif
 320         acu_flush ();
 321         t3000_nap();
 322         for ( ; n-- ; cp++) {
 323                 write(fd, cp, 1);
 324                 acu_flush ();
 325                 t3000_nap();
 326         }
 327 }
 328
 329 #ifdef DEBUG
 330 t3000_verbose_read()
 331 {
 332         int n = 0;
 333         char buf[BUFSIZ];
 334
 335         if (ioctl(FD, FIONREAD, &n) < 0)
 336                 return;
 337         if (n <= 0)
 338                 return;
 339         if (read(FD, buf, n) != n)
 340                 return;
 341         write(1, buf, n);
 342 }
 343 #endif
 344
 345 t3000_nap()
 346 {
 347         acu_nap (50);
 348 }
 349
 350 /* end of t3000.c */