1 /* 2 * Copyright (c) 1986, 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[] = "@(#)courier.c 8.1 (Berkeley) 06/06/93"; 10 #endif /* not lint */ 11 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 void sigALRM(); 22 static int timeout = 0; 23 static int connected = 0; 24 static jmp_buf timeoutbuf, intbuf; 25 static int coursync(); 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 static int cour_connect(), cour_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 (!coursync()) { 45 badsynch: 46 printf("can't synchronize with courier\n"); 47 #ifdef ACULOG 48 logent(value(HOST), num, "courier", "can't synch up"); 49 #endif 50 return (0); 51 } 52 cour_write(FD, "AT E0\r", 6); /* turn off echoing */ 53 sleep(1); 54 #ifdef DEBUG 55 if (boolean(value(VERBOSE))) 56 cour_verbose_read(); 57 #endif 58 ioctl(FD, TIOCFLUSH, 0); /* flush any clutter */ 59 cour_write(FD, "AT C1 E0 H0 Q0 X6 V1\r", 21); 60 if (!cour_swallow("\r\nOK\r\n")) 61 goto badsynch; 62 fflush(stdout); 63 cour_write(FD, "AT D", 4); 64 for (cp = num; *cp; cp++) 65 if (*cp == '=') 66 *cp = ','; 67 cour_write(FD, num, strlen(num)); 68 cour_write(FD, "\r", 1); 69 connected = cour_connect(); 70 #ifdef ACULOG 71 if (timeout) { 72 sprintf(line, "%d second dial timeout", 73 number(value(DIALTIMEOUT))); 74 logent(value(HOST), num, "cour", line); 75 } 76 #endif 77 if (timeout) 78 cour_disconnect(); 79 return (connected); 80 } 81 82 cour_disconnect() 83 { 84 /* first hang up the modem*/ 85 ioctl(FD, TIOCCDTR, 0); 86 sleep(1); 87 ioctl(FD, TIOCSDTR, 0); 88 coursync(); /* reset */ 89 close(FD); 90 } 91 92 cour_abort() 93 { 94 cour_write(FD, "\r", 1); /* send anything to abort the call */ 95 cour_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 cour_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 struct baud_msg { 142 char *msg; 143 int baud; 144 } baud_msg[] = { 145 "", B300, 146 " 1200", B1200, 147 " 2400", B2400, 148 " 9600", B9600, 149 " 9600/ARQ", B9600, 150 0, 0, 151 }; 152 153 static int 154 cour_connect() 155 { 156 char c; 157 int nc, nl, n; 158 struct sgttyb sb; 159 char dialer_buf[64]; 160 struct baud_msg *bm; 161 sig_t f; 162 163 if (cour_swallow("\r\n") == 0) 164 return (0); 165 f = signal(SIGALRM, sigALRM); 166 again: 167 nc = 0; nl = sizeof(dialer_buf)-1; 168 bzero(dialer_buf, sizeof(dialer_buf)); 169 timeout = 0; 170 for (nc = 0, nl = sizeof(dialer_buf)-1 ; nl > 0 ; nc++, nl--) { 171 if (setjmp(timeoutbuf)) 172 break; 173 alarm(number(value(DIALTIMEOUT))); 174 n = read(FD, &c, 1); 175 alarm(0); 176 if (n <= 0) 177 break; 178 c &= 0x7f; 179 if (c == '\r') { 180 if (cour_swallow("\n") == 0) 181 break; 182 if (!dialer_buf[0]) 183 goto again; 184 if (strcmp(dialer_buf, "RINGING") == 0 && 185 boolean(value(VERBOSE))) { 186 #ifdef DEBUG 187 printf("%s\r\n", dialer_buf); 188 #endif 189 goto again; 190 } 191 if (strncmp(dialer_buf, "CONNECT", 192 sizeof("CONNECT")-1) != 0) 193 break; 194 for (bm = baud_msg ; bm->msg ; bm++) 195 if (strcmp(bm->msg, 196 dialer_buf+sizeof("CONNECT")-1) == 0) { 197 if (ioctl(FD, TIOCGETP, &sb) < 0) { 198 perror("TIOCGETP"); 199 goto error; 200 } 201 sb.sg_ispeed = sb.sg_ospeed = bm->baud; 202 if (ioctl(FD, TIOCSETP, &sb) < 0) { 203 perror("TIOCSETP"); 204 goto error; 205 } 206 signal(SIGALRM, f); 207 #ifdef DEBUG 208 if (boolean(value(VERBOSE))) 209 printf("%s\r\n", dialer_buf); 210 #endif 211 return (1); 212 } 213 break; 214 } 215 dialer_buf[nc] = c; 216 #ifdef notdef 217 if (boolean(value(VERBOSE))) 218 putchar(c); 219 #endif 220 } 221 error1: 222 printf("%s\r\n", dialer_buf); 223 error: 224 signal(SIGALRM, f); 225 return (0); 226 } 227 228 /* 229 * This convoluted piece of code attempts to get 230 * the courier in sync. 231 */ 232 static int 233 coursync() 234 { 235 int already = 0; 236 int len; 237 char buf[40]; 238 239 while (already++ < MAXRETRY) { 240 ioctl(FD, TIOCFLUSH, 0); /* flush any clutter */ 241 cour_write(FD, "\rAT Z\r", 6); /* reset modem */ 242 bzero(buf, sizeof(buf)); 243 sleep(1); 244 ioctl(FD, FIONREAD, &len); 245 if (len) { 246 len = read(FD, buf, sizeof(buf)); 247 #ifdef DEBUG 248 buf[len] = '\0'; 249 printf("coursync: (\"%s\")\n\r", buf); 250 #endif 251 if (index(buf, '0') || 252 (index(buf, 'O') && index(buf, 'K'))) 253 return(1); 254 } 255 /* 256 * If not strapped for DTR control, 257 * try to get command mode. 258 */ 259 sleep(1); 260 cour_write(FD, "+++", 3); 261 sleep(1); 262 /* 263 * Toggle DTR to force anyone off that might have left 264 * the modem connected. 265 */ 266 ioctl(FD, TIOCCDTR, 0); 267 sleep(1); 268 ioctl(FD, TIOCSDTR, 0); 269 } 270 cour_write(FD, "\rAT Z\r", 6); 271 return (0); 272 } 273 274 cour_write(fd, cp, n) 275 int fd; 276 char *cp; 277 int n; 278 { 279 struct sgttyb sb; 280 #ifdef notdef 281 if (boolean(value(VERBOSE))) 282 write(1, cp, n); 283 #endif 284 ioctl(fd, TIOCGETP, &sb); 285 ioctl(fd, TIOCSETP, &sb); 286 cour_nap(); 287 for ( ; n-- ; cp++) { 288 write(fd, cp, 1); 289 ioctl(fd, TIOCGETP, &sb); 290 ioctl(fd, TIOCSETP, &sb); 291 cour_nap(); 292 } 293 } 294 295 #ifdef DEBUG 296 cour_verbose_read() 297 { 298 int n = 0; 299 char buf[BUFSIZ]; 300 301 if (ioctl(FD, FIONREAD, &n) < 0) 302 return; 303 if (n <= 0) 304 return; 305 if (read(FD, buf, n) != n) 306 return; 307 write(1, buf, n); 308 } 309 #endif 310 311 /* 312 * Code stolen from /usr/src/lib/libc/gen/sleep.c 313 */ 314 #define mask(s) (1<<((s)-1)) 315 #define setvec(vec, a) \ 316 vec.sv_handler = a; vec.sv_mask = vec.sv_onstack = 0 317 318 static napms = 50; /* Give the courier 50 milliseconds between characters */ 319 320 static int ringring; 321 322 cour_nap() 323 { 324 325 static void cour_napx(); 326 int omask; 327 struct itimerval itv, oitv; 328 register struct itimerval *itp = &itv; 329 struct sigvec vec, ovec; 330 331 timerclear(&itp->it_interval); 332 timerclear(&itp->it_value); 333 if (setitimer(ITIMER_REAL, itp, &oitv) < 0) 334 return; 335 setvec(ovec, SIG_DFL); 336 omask = sigblock(mask(SIGALRM)); 337 itp->it_value.tv_sec = napms/1000; 338 itp->it_value.tv_usec = ((napms%1000)*1000); 339 setvec(vec, cour_napx); 340 ringring = 0; 341 (void) sigvec(SIGALRM, &vec, &ovec); 342 (void) setitimer(ITIMER_REAL, itp, (struct itimerval *)0); 343 while (!ringring) 344 sigpause(omask &~ mask(SIGALRM)); 345 (void) sigvec(SIGALRM, &ovec, (struct sigvec *)0); 346 (void) setitimer(ITIMER_REAL, &oitv, (struct itimerval *)0); 347 (void) sigsetmask(omask); 348 } 349 350 static void 351 cour_napx() 352 { 353 ringring = 1; 354 } 355