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