1: /*
   2:  * Copyright (c) 1986 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  */
   6: 
   7: #if defined(DOSCCS) && !defined(lint)
   8: static char sccsid[] = "@(#)courier.c	5.2.1 (2.11BSD GTE) 1/1/94";
   9: #endif
  10: 
  11: #define write cour_write
  12: /*
  13:  * Routines for calling up on a Courier modem.
  14:  * Derived from Hayes driver.
  15:  */
  16: #include "tip.h"
  17: #include <stdio.h>
  18: 
  19: #define MAXRETRY    5
  20: 
  21: static  int sigALRM();
  22: static  int timeout = 0;
  23: static  int connected = 0;
  24: static  jmp_buf timeoutbuf, intbuf;
  25: static  int (*osigint)();
  26: 
  27: cour_dialer(num, acu)
  28:     register char *num;
  29:     char *acu;
  30: {
  31:     register char *cp;
  32: #ifdef ACULOG
  33:     char line[80];
  34: #endif
  35:     if (boolean(value(VERBOSE)))
  36:         printf("Using \"%s\"\n", acu);
  37: 
  38:     ioctl(FD, TIOCHPCL, 0);
  39:     /*
  40: 	 * Get in synch.
  41: 	 */
  42:     if (!coursync()) {
  43: badsynch:
  44:         printf("can't synchronize with courier\n");
  45: #ifdef ACULOG
  46:         logent(value(HOST), num, "courier", "can't synch up");
  47: #endif
  48:         return (0);
  49:     }
  50:     write(FD, "AT E0\r", 6);    /* turn off echoing */
  51:     sleep(1);
  52: #ifdef DEBUG
  53:     if (boolean(value(VERBOSE)))
  54:         verbose_read();
  55: #endif
  56:     ioctl(FD, TIOCFLUSH, 0);    /* flush any clutter */
  57:     write(FD, "AT C1 E0 H0 Q0 X6 V1\r", 21);
  58:     if (!cour_swallow("\r\nOK\r\n"))
  59:         goto badsynch;
  60:     fflush(stdout);
  61:     write(FD, "AT D", 4);
  62:     for (cp = num; *cp; cp++)
  63:         if (*cp == '=')
  64:             *cp = ',';
  65:     write(FD, num, strlen(num));
  66:     write(FD, "\r", 1);
  67:     connected = cour_connect();
  68: #ifdef ACULOG
  69:     if (timeout) {
  70:         sprintf(line, "%d second dial timeout",
  71:             number(value(DIALTIMEOUT)));
  72:         logent(value(HOST), num, "cour", line);
  73:     }
  74: #endif
  75:     if (timeout)
  76:         cour_disconnect();
  77:     return (connected);
  78: }
  79: 
  80: cour_disconnect()
  81: {
  82:      /* first hang up the modem*/
  83:     ioctl(FD, TIOCCDTR, 0);
  84:     sleep(1);
  85:     ioctl(FD, TIOCSDTR, 0);
  86:     coursync();             /* reset */
  87:     close(FD);
  88: }
  89: 
  90: cour_abort()
  91: {
  92:     write(FD, "\r", 1); /* send anything to abort the call */
  93:     cour_disconnect();
  94: }
  95: 
  96: static int
  97: sigALRM()
  98: {
  99:     printf("\07timeout waiting for reply\n");
 100:     timeout = 1;
 101:     longjmp(timeoutbuf, 1);
 102: }
 103: 
 104: static int
 105: cour_swallow(match)
 106:   register char *match;
 107:   {
 108:     char c;
 109:     int (*f)();
 110: 
 111:     f = signal(SIGALRM, sigALRM);
 112:     timeout = 0;
 113:     do {
 114:         if (*match =='\0') {
 115:             signal(SIGALRM, f);
 116:             return (1);
 117:         }
 118:         if (setjmp(timeoutbuf)) {
 119:             signal(SIGALRM, f);
 120:             return (0);
 121:         }
 122:         alarm(number(value(DIALTIMEOUT)));
 123:         read(FD, &c, 1);
 124:         alarm(0);
 125:         c &= 0177;
 126: #ifdef DEBUG
 127:         if (boolean(value(VERBOSE)))
 128:             putchar(c);
 129: #endif
 130:     } while (c == *match++);
 131: #ifdef DEBUG
 132:     if (boolean(value(VERBOSE)))
 133:         fflush(stdout);
 134: #endif
 135:     signal(SIGALRM, SIG_DFL);
 136:     return (0);
 137: }
 138: 
 139: struct baud_msg {
 140:     char *msg;
 141:     int baud;
 142: } baud_msg[] = {
 143:     "",     B300,
 144:     " 1200",    B1200,
 145:     " 2400",    B2400,
 146:     0,      0,
 147: };
 148: 
 149: static int
 150: cour_connect()
 151: {
 152:     char c;
 153:     int nc, nl, n;
 154:     struct sgttyb sb;
 155:     char dialer_buf[64];
 156:     struct baud_msg *bm;
 157:     int (*f)();
 158: 
 159:     if (cour_swallow("\r\n") == 0)
 160:         return (0);
 161:     f = signal(SIGALRM, sigALRM);
 162: again:
 163:     nc = 0; nl = sizeof(dialer_buf)-1;
 164:     bzero(dialer_buf, sizeof(dialer_buf));
 165:     timeout = 0;
 166:     for (nc = 0, nl = sizeof(dialer_buf)-1 ; nl > 0 ; nc++, nl--) {
 167:         if (setjmp(timeoutbuf))
 168:             break;
 169:         alarm(number(value(DIALTIMEOUT)));
 170:         n = read(FD, &c, 1);
 171:         alarm(0);
 172:         if (n <= 0)
 173:             break;
 174:         c &= 0x7f;
 175:         if (c == '\r') {
 176:             if (cour_swallow("\n") == 0)
 177:                 break;
 178:             if (!dialer_buf[0])
 179:                 goto again;
 180:             if (strcmp(dialer_buf, "RINGING") == 0 &&
 181:                 boolean(value(VERBOSE))) {
 182: #ifdef DEBUG
 183:                 printf("%s\r\n", dialer_buf);
 184: #endif
 185:                 goto again;
 186:             }
 187:             if (strncmp(dialer_buf, "CONNECT",
 188:                     sizeof("CONNECT")-1) != 0)
 189:                 break;
 190:             for (bm = baud_msg ; bm ; bm++)
 191:                 if (strcmp(bm->msg,
 192:                     dialer_buf+sizeof("CONNECT")-1) == 0) {
 193:                     if (ioctl(FD, TIOCGETP, &sb) < 0) {
 194:                         perror("TIOCGETP");
 195:                         goto error;
 196:                     }
 197:                     sb.sg_ispeed = sb.sg_ospeed = bm->baud;
 198:                     if (ioctl(FD, TIOCSETP, &sb) < 0) {
 199:                         perror("TIOCSETP");
 200:                         goto error;
 201:                     }
 202:                     signal(SIGALRM, f);
 203: #ifdef DEBUG
 204:                     if (boolean(value(VERBOSE)))
 205:                         printf("%s\r\n", dialer_buf);
 206: #endif
 207:                     return (1);
 208:                 }
 209:             break;
 210:         }
 211:         dialer_buf[nc] = c;
 212: #ifdef notdef
 213:         if (boolean(value(VERBOSE)))
 214:             putchar(c);
 215: #endif
 216:     }
 217: error1:
 218:     printf("%s\r\n", dialer_buf);
 219: error:
 220:     signal(SIGALRM, f);
 221:     return (0);
 222: }
 223: 
 224: /*
 225:  * This convoluted piece of code attempts to get
 226:  * the courier in sync.
 227:  */
 228: static int
 229: coursync()
 230: {
 231:     int already = 0;
 232:     int len;
 233:     long nread;
 234:     char buf[40];
 235: 
 236:     while (already++ < MAXRETRY) {
 237:         ioctl(FD, TIOCFLUSH, 0);    /* flush any clutter */
 238:         write(FD, "\rAT Z\r", 6);   /* reset modem */
 239:         bzero(buf, sizeof(buf));
 240:         sleep(1);
 241:         ioctl(FD, FIONREAD, &nread);
 242:         if (nread) {
 243:             len = read(FD, buf, sizeof(buf));
 244: #ifdef DEBUG
 245:             buf[len] = '\0';
 246:             printf("coursync: (\"%s\")\n\r", buf);
 247: #endif
 248:             if (index(buf, '0') ||
 249:                (index(buf, 'O') && index(buf, 'K')))
 250:                 return(1);
 251:         }
 252:         /*
 253: 		 * If not strapped for DTR control,
 254: 		 * try to get command mode.
 255: 		 */
 256:         sleep(1);
 257:         write(FD, "+++", 3);
 258:         sleep(1);
 259:         /*
 260: 		 * Toggle DTR to force anyone off that might have left
 261: 		 * the modem connected.
 262: 		 */
 263:         ioctl(FD, TIOCCDTR, 0);
 264:         sleep(1);
 265:         ioctl(FD, TIOCSDTR, 0);
 266:     }
 267:     write(FD, "\rAT Z\r", 6);
 268:     return (0);
 269: }
 270: 
 271: #undef write
 272: 
 273: cour_write(fd, cp, n)
 274: int fd;
 275: char *cp;
 276: int n;
 277: {
 278:     struct sgttyb sb;
 279: #ifdef notdef
 280:     if (boolean(value(VERBOSE)))
 281:         write(1, cp, n);
 282: #endif
 283:     ioctl(fd, TIOCGETP, &sb);
 284:     ioctl(fd, TIOCSETP, &sb);
 285:     cour_nap();
 286:     for ( ; n-- ; cp++) {
 287:         write(fd, cp, 1);
 288:         ioctl(fd, TIOCGETP, &sb);
 289:         ioctl(fd, TIOCSETP, &sb);
 290:         cour_nap();
 291:     }
 292: }
 293: 
 294: #ifdef DEBUG
 295: verbose_read()
 296: {
 297:     long n = 0;
 298:     char buf[BUFSIZ];
 299: 
 300:     if (ioctl(FD, FIONREAD, &n) < 0)
 301:         return;
 302:     if (n <= 0)
 303:         return;
 304:     if (read(FD, buf, (int)n) != n)
 305:         return;
 306:     write(1, buf, (int)n);
 307: }
 308: #endif
 309: 
 310: /*
 311:  * Code stolen from /usr/src/lib/libc/gen/sleep.c
 312:  */
 313: #include <sys/time.h>
 314: 
 315: #define mask(s) sigmask(s)
 316: #define setvec(vec, a) \
 317:         vec.sv_handler = a; vec.sv_mask = vec.sv_onstack = 0
 318: 
 319: static napms = 50; /* Give the courier 50 milliseconds between characters */
 320: 
 321: static int ringring;
 322: 
 323: cour_nap()
 324: {
 325: 
 326:     int cour_napx();
 327:     long omask;
 328:         struct itimerval itv, oitv;
 329:         register struct itimerval *itp = &itv;
 330:         struct sigvec vec, ovec;
 331: 
 332:         timerclear(&itp->it_interval);
 333:         timerclear(&itp->it_value);
 334:         if (setitimer(ITIMER_REAL, itp, &oitv) < 0)
 335:                 return;
 336:         setvec(ovec, SIG_DFL);
 337:         omask = sigblock(mask(SIGALRM));
 338:         itp->it_value.tv_sec = napms/1000;
 339:     itp->it_value.tv_usec = ((napms%1000)*1000);
 340:         setvec(vec, cour_napx);
 341:         ringring = 0;
 342:         (void) sigvec(SIGALRM, &vec, &ovec);
 343:         (void) setitimer(ITIMER_REAL, itp, (struct itimerval *)0);
 344:         while (!ringring)
 345:                 sigpause(omask &~ mask(SIGALRM));
 346:         (void) sigvec(SIGALRM, &ovec, (struct sigvec *)0);
 347:         (void) setitimer(ITIMER_REAL, &oitv, (struct itimerval *)0);
 348:     (void) sigsetmask(omask);
 349: }
 350: 
 351: static
 352: cour_napx()
 353: {
 354:         ringring = 1;
 355: }

Defined functions

cour_abort defined in line 90; never used
cour_connect defined in line 149; used 1 times
  • in line 67
cour_dialer defined in line 27; never used
cour_disconnect defined in line 80; used 2 times
cour_nap defined in line 323; used 2 times
cour_napx defined in line 351; used 2 times
cour_swallow defined in line 104; used 3 times
cour_write defined in line 273; used 1 times
  • in line 11
coursync defined in line 228; used 2 times
sigALRM defined in line 96; used 3 times
verbose_read defined in line 295; used 1 times
  • in line 54

Defined variables

baud_msg defined in line 142; used 1 times
connected defined in line 23; used 2 times
ringring defined in line 321; used 3 times
sccsid defined in line 8; never used
timeout defined in line 22; used 5 times

Defined struct's

baud_msg defined in line 139; used 2 times
  • in line 156(2)

Defined macros

MAXRETRY defined in line 19; used 1 times
mask defined in line 315; used 2 times
setvec defined in line 316; used 2 times
write defined in line 11; used 13 times
Last modified: 1994-01-11
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