1 /* 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)t3000.c 8.1 (Berkeley) 06/06/93"; 10 #endif /* not lint */ 11 12 /* 13 * Routines for calling up on a Telebit T3000 modem. 14 * Derived from Courier driver. 15 */ 16 #include "tip.h" 17 #include <stdio.h> 18 19 #define MAXRETRY 5 20 21 static void sigALRM(); 22 static int timeout = 0; 23 static int connected = 0; 24 static jmp_buf timeoutbuf, intbuf; 25 static int t3000_sync(); 26 27 t3000_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 static int t3000_connect(), t3000_swallow(); 36 37 if (boolean(value(VERBOSE))) 38 printf("Using \"%s\"\n", acu); 39 40 ioctl(FD, TIOCHPCL, 0); 41 /* 42 * Get in synch. 43 */ 44 if (!t3000_sync()) { 45 badsynch: 46 printf("can't synchronize with t3000\n"); 47 #ifdef ACULOG 48 logent(value(HOST), num, "t3000", "can't synch up"); 49 #endif 50 return (0); 51 } 52 t3000_write(FD, "AT E0\r", 6); /* turn off echoing */ 53 sleep(1); 54 #ifdef DEBUG 55 if (boolean(value(VERBOSE))) 56 t3000_verbose_read(); 57 #endif 58 ioctl(FD, TIOCFLUSH, 0); /* flush any clutter */ 59 t3000_write(FD, "AT E0 H0 Q0 X4 V1\r", 18); 60 if (!t3000_swallow("\r\nOK\r\n")) 61 goto badsynch; 62 fflush(stdout); 63 t3000_write(FD, "AT D", 4); 64 for (cp = num; *cp; cp++) 65 if (*cp == '=') 66 *cp = ','; 67 t3000_write(FD, num, strlen(num)); 68 t3000_write(FD, "\r", 1); 69 connected = t3000_connect(); 70 #ifdef ACULOG 71 if (timeout) { 72 sprintf(line, "%d second dial timeout", 73 number(value(DIALTIMEOUT))); 74 logent(value(HOST), num, "t3000", line); 75 } 76 #endif 77 if (timeout) 78 t3000_disconnect(); 79 return (connected); 80 } 81 82 t3000_disconnect() 83 { 84 /* first hang up the modem*/ 85 ioctl(FD, TIOCCDTR, 0); 86 sleep(1); 87 ioctl(FD, TIOCSDTR, 0); 88 t3000_sync(); /* reset */ 89 close(FD); 90 } 91 92 t3000_abort() 93 { 94 t3000_write(FD, "\r", 1); /* send anything to abort the call */ 95 t3000_disconnect(); 96 } 97 98 static void 99 sigALRM() 100 { 101 printf("\07timeout waiting for reply\n"); 102 timeout = 1; 103 longjmp(timeoutbuf, 1); 104 } 105 106 static int 107 t3000_swallow(match) 108 register char *match; 109 { 110 sig_t f; 111 char c; 112 113 f = signal(SIGALRM, sigALRM); 114 timeout = 0; 115 do { 116 if (*match =='\0') { 117 signal(SIGALRM, f); 118 return (1); 119 } 120 if (setjmp(timeoutbuf)) { 121 signal(SIGALRM, f); 122 return (0); 123 } 124 alarm(number(value(DIALTIMEOUT))); 125 read(FD, &c, 1); 126 alarm(0); 127 c &= 0177; 128 #ifdef DEBUG 129 if (boolean(value(VERBOSE))) 130 putchar(c); 131 #endif 132 } while (c == *match++); 133 #ifdef DEBUG 134 if (boolean(value(VERBOSE))) 135 fflush(stdout); 136 #endif 137 signal(SIGALRM, SIG_DFL); 138 return (0); 139 } 140 141 #ifndef B19200 /* XXX */ 142 #define B19200 EXTA 143 #define B38400 EXTB 144 #endif 145 146 struct tbaud_msg { 147 char *msg; 148 int baud; 149 int baud2; 150 } tbaud_msg[] = { 151 "", B300, 0, 152 " 1200", B1200, 0, 153 " 2400", B2400, 0, 154 " 4800", B4800, 0, 155 " 9600", B9600, 0, 156 " 14400", B19200, B9600, 157 " 19200", B19200, B9600, 158 " 38400", B38400, B9600, 159 " 57600", B38400, B9600, 160 " 7512", B9600, 0, 161 " 1275", B2400, 0, 162 " 7200", B9600, 0, 163 " 12000", B19200, B9600, 164 0, 0, 0, 165 }; 166 167 static int 168 t3000_connect() 169 { 170 char c; 171 int nc, nl, n; 172 struct sgttyb sb; 173 char dialer_buf[64]; 174 struct tbaud_msg *bm; 175 sig_t f; 176 177 if (t3000_swallow("\r\n") == 0) 178 return (0); 179 f = signal(SIGALRM, sigALRM); 180 again: 181 nc = 0; nl = sizeof(dialer_buf)-1; 182 bzero(dialer_buf, sizeof(dialer_buf)); 183 timeout = 0; 184 for (nc = 0, nl = sizeof(dialer_buf)-1 ; nl > 0 ; nc++, nl--) { 185 if (setjmp(timeoutbuf)) 186 break; 187 alarm(number(value(DIALTIMEOUT))); 188 n = read(FD, &c, 1); 189 alarm(0); 190 if (n <= 0) 191 break; 192 c &= 0x7f; 193 if (c == '\r') { 194 if (t3000_swallow("\n") == 0) 195 break; 196 if (!dialer_buf[0]) 197 goto again; 198 if (strcmp(dialer_buf, "RINGING") == 0 && 199 boolean(value(VERBOSE))) { 200 #ifdef DEBUG 201 printf("%s\r\n", dialer_buf); 202 #endif 203 goto again; 204 } 205 if (strncmp(dialer_buf, "CONNECT", 206 sizeof("CONNECT")-1) != 0) 207 break; 208 for (bm = tbaud_msg ; bm->msg ; bm++) 209 if (strcmp(bm->msg, 210 dialer_buf+sizeof("CONNECT")-1) == 0) { 211 if (ioctl(FD, TIOCGETP, &sb) < 0) { 212 perror("TIOCGETP"); 213 goto error; 214 } 215 sb.sg_ispeed = sb.sg_ospeed = bm->baud; 216 if (ioctl(FD, TIOCSETP, &sb) < 0) { 217 if (bm->baud2) { 218 sb.sg_ispeed = 219 sb.sg_ospeed = 220 bm->baud2; 221 if (ioctl(FD, 222 TIOCSETP, 223 &sb) >= 0) 224 goto isok; 225 } 226 perror("TIOCSETP"); 227 goto error; 228 } 229 isok: 230 signal(SIGALRM, f); 231 #ifdef DEBUG 232 if (boolean(value(VERBOSE))) 233 printf("%s\r\n", dialer_buf); 234 #endif 235 return (1); 236 } 237 break; 238 } 239 dialer_buf[nc] = c; 240 #ifdef notdef 241 if (boolean(value(VERBOSE))) 242 putchar(c); 243 #endif 244 } 245 error1: 246 printf("%s\r\n", dialer_buf); 247 error: 248 signal(SIGALRM, f); 249 return (0); 250 } 251 252 /* 253 * This convoluted piece of code attempts to get 254 * the t3000 in sync. 255 */ 256 static int 257 t3000_sync() 258 { 259 int already = 0; 260 int len; 261 char buf[40]; 262 263 while (already++ < MAXRETRY) { 264 ioctl(FD, TIOCFLUSH, 0); /* flush any clutter */ 265 t3000_write(FD, "\rAT Z\r", 6); /* reset modem */ 266 bzero(buf, sizeof(buf)); 267 sleep(2); 268 ioctl(FD, FIONREAD, &len); 269 #if 1 270 if (len == 0) len = 1; 271 #endif 272 if (len) { 273 len = read(FD, buf, sizeof(buf)); 274 #ifdef DEBUG 275 buf[len] = '\0'; 276 printf("t3000_sync: (\"%s\")\n\r", buf); 277 #endif 278 if (index(buf, '0') || 279 (index(buf, 'O') && index(buf, 'K'))) 280 return(1); 281 } 282 /* 283 * If not strapped for DTR control, 284 * try to get command mode. 285 */ 286 sleep(1); 287 t3000_write(FD, "+++", 3); 288 sleep(1); 289 /* 290 * Toggle DTR to force anyone off that might have left 291 * the modem connected. 292 */ 293 ioctl(FD, TIOCCDTR, 0); 294 sleep(1); 295 ioctl(FD, TIOCSDTR, 0); 296 } 297 t3000_write(FD, "\rAT Z\r", 6); 298 return (0); 299 } 300 301 t3000_write(fd, cp, n) 302 int fd; 303 char *cp; 304 int n; 305 { 306 struct sgttyb sb; 307 308 #ifdef notdef 309 if (boolean(value(VERBOSE))) 310 write(1, cp, n); 311 #endif 312 ioctl(fd, TIOCGETP, &sb); 313 ioctl(fd, TIOCSETP, &sb); 314 t3000_nap(); 315 for ( ; n-- ; cp++) { 316 write(fd, cp, 1); 317 ioctl(fd, TIOCGETP, &sb); 318 ioctl(fd, TIOCSETP, &sb); 319 t3000_nap(); 320 } 321 } 322 323 #ifdef DEBUG 324 t3000_verbose_read() 325 { 326 int n = 0; 327 char buf[BUFSIZ]; 328 329 if (ioctl(FD, FIONREAD, &n) < 0) 330 return; 331 if (n <= 0) 332 return; 333 if (read(FD, buf, n) != n) 334 return; 335 write(1, buf, n); 336 } 337 #endif 338 339 /* 340 * Code stolen from /usr/src/lib/libc/gen/sleep.c 341 */ 342 #define mask(s) (1<<((s)-1)) 343 #define setvec(vec, a) \ 344 vec.sv_handler = a; vec.sv_mask = vec.sv_onstack = 0 345 346 static napms = 50; /* Give the t3000 50 milliseconds between characters */ 347 348 static int ringring; 349 350 t3000_nap() 351 { 352 353 static void t3000_napx(); 354 int omask; 355 struct itimerval itv, oitv; 356 register struct itimerval *itp = &itv; 357 struct sigvec vec, ovec; 358 359 timerclear(&itp->it_interval); 360 timerclear(&itp->it_value); 361 if (setitimer(ITIMER_REAL, itp, &oitv) < 0) 362 return; 363 setvec(ovec, SIG_DFL); 364 omask = sigblock(mask(SIGALRM)); 365 itp->it_value.tv_sec = napms/1000; 366 itp->it_value.tv_usec = ((napms%1000)*1000); 367 setvec(vec, t3000_napx); 368 ringring = 0; 369 (void) sigvec(SIGALRM, &vec, &ovec); 370 (void) setitimer(ITIMER_REAL, itp, (struct itimerval *)0); 371 while (!ringring) 372 sigpause(omask &~ mask(SIGALRM)); 373 (void) sigvec(SIGALRM, &ovec, (struct sigvec *)0); 374 (void) setitimer(ITIMER_REAL, &oitv, (struct itimerval *)0); 375 (void) sigsetmask(omask); 376 } 377 378 static void 379 t3000_napx() 380 { 381 ringring = 1; 382 } 383