1 /* 2 * Copyright (c) 1986 The Regents of the University of California. 3 * 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[] = "@(#)courier.c 5.7 (Berkeley) 3/2/91"; 36 #endif /* not lint */ 37 38 /* 39 * Routines for calling up on a Courier modem. 40 * Derived from Hayes driver. 41 */ 42 #include "tip.h" 43 #include <stdio.h> 44 45 #define MAXRETRY 5 46 47 static void sigALRM(); 48 static int timeout = 0; 49 static int connected = 0; 50 static jmp_buf timeoutbuf, intbuf; 51 static int coursync(); 52 53 cour_dialer(num, acu) 54 register char *num; 55 char *acu; 56 { 57 register char *cp; 58 #ifdef ACULOG 59 char line[80]; 60 #endif 61 static int cour_connect(), cour_swallow(); 62 63 if (boolean(value(VERBOSE))) 64 printf("Using \"%s\"\n", acu); 65 66 ioctl(FD, TIOCHPCL, 0); 67 /* 68 * Get in synch. 69 */ 70 if (!coursync()) { 71 badsynch: 72 printf("can't synchronize with courier\n"); 73 #ifdef ACULOG 74 logent(value(HOST), num, "courier", "can't synch up"); 75 #endif 76 return (0); 77 } 78 cour_write(FD, "AT E0\r", 6); /* turn off echoing */ 79 sleep(1); 80 #ifdef DEBUG 81 if (boolean(value(VERBOSE))) 82 verbose_read(); 83 #endif 84 ioctl(FD, TIOCFLUSH, 0); /* flush any clutter */ 85 cour_write(FD, "AT C1 E0 H0 Q0 X6 V1\r", 21); 86 if (!cour_swallow("\r\nOK\r\n")) 87 goto badsynch; 88 fflush(stdout); 89 cour_write(FD, "AT D", 4); 90 for (cp = num; *cp; cp++) 91 if (*cp == '=') 92 *cp = ','; 93 cour_write(FD, num, strlen(num)); 94 cour_write(FD, "\r", 1); 95 connected = cour_connect(); 96 #ifdef ACULOG 97 if (timeout) { 98 sprintf(line, "%d second dial timeout", 99 number(value(DIALTIMEOUT))); 100 logent(value(HOST), num, "cour", line); 101 } 102 #endif 103 if (timeout) 104 cour_disconnect(); 105 return (connected); 106 } 107 108 cour_disconnect() 109 { 110 /* first hang up the modem*/ 111 ioctl(FD, TIOCCDTR, 0); 112 sleep(1); 113 ioctl(FD, TIOCSDTR, 0); 114 coursync(); /* reset */ 115 close(FD); 116 } 117 118 cour_abort() 119 { 120 cour_write(FD, "\r", 1); /* send anything to abort the call */ 121 cour_disconnect(); 122 } 123 124 static void 125 sigALRM() 126 { 127 printf("\07timeout waiting for reply\n"); 128 timeout = 1; 129 longjmp(timeoutbuf, 1); 130 } 131 132 static int 133 cour_swallow(match) 134 register char *match; 135 { 136 sig_t f; 137 char c; 138 139 f = signal(SIGALRM, sigALRM); 140 timeout = 0; 141 do { 142 if (*match =='\0') { 143 signal(SIGALRM, f); 144 return (1); 145 } 146 if (setjmp(timeoutbuf)) { 147 signal(SIGALRM, f); 148 return (0); 149 } 150 alarm(number(value(DIALTIMEOUT))); 151 read(FD, &c, 1); 152 alarm(0); 153 c &= 0177; 154 #ifdef DEBUG 155 if (boolean(value(VERBOSE))) 156 putchar(c); 157 #endif 158 } while (c == *match++); 159 #ifdef DEBUG 160 if (boolean(value(VERBOSE))) 161 fflush(stdout); 162 #endif 163 signal(SIGALRM, SIG_DFL); 164 return (0); 165 } 166 167 struct baud_msg { 168 char *msg; 169 int baud; 170 } baud_msg[] = { 171 "", B300, 172 " 1200", B1200, 173 " 2400", B2400, 174 0, 0, 175 }; 176 177 static int 178 cour_connect() 179 { 180 char c; 181 int nc, nl, n; 182 struct sgttyb sb; 183 char dialer_buf[64]; 184 struct baud_msg *bm; 185 sig_t f; 186 187 if (cour_swallow("\r\n") == 0) 188 return (0); 189 f = signal(SIGALRM, sigALRM); 190 again: 191 nc = 0; nl = sizeof(dialer_buf)-1; 192 bzero(dialer_buf, sizeof(dialer_buf)); 193 timeout = 0; 194 for (nc = 0, nl = sizeof(dialer_buf)-1 ; nl > 0 ; nc++, nl--) { 195 if (setjmp(timeoutbuf)) 196 break; 197 alarm(number(value(DIALTIMEOUT))); 198 n = read(FD, &c, 1); 199 alarm(0); 200 if (n <= 0) 201 break; 202 c &= 0x7f; 203 if (c == '\r') { 204 if (cour_swallow("\n") == 0) 205 break; 206 if (!dialer_buf[0]) 207 goto again; 208 if (strcmp(dialer_buf, "RINGING") == 0 && 209 boolean(value(VERBOSE))) { 210 #ifdef DEBUG 211 printf("%s\r\n", dialer_buf); 212 #endif 213 goto again; 214 } 215 if (strncmp(dialer_buf, "CONNECT", 216 sizeof("CONNECT")-1) != 0) 217 break; 218 for (bm = baud_msg ; bm->msg ; bm++) 219 if (strcmp(bm->msg, 220 dialer_buf+sizeof("CONNECT")-1) == 0) { 221 if (ioctl(FD, TIOCGETP, &sb) < 0) { 222 perror("TIOCGETP"); 223 goto error; 224 } 225 sb.sg_ispeed = sb.sg_ospeed = bm->baud; 226 if (ioctl(FD, TIOCSETP, &sb) < 0) { 227 perror("TIOCSETP"); 228 goto error; 229 } 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 courier in sync. 255 */ 256 static int 257 coursync() 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 cour_write(FD, "\rAT Z\r", 6); /* reset modem */ 266 bzero(buf, sizeof(buf)); 267 sleep(1); 268 ioctl(FD, FIONREAD, &len); 269 if (len) { 270 len = read(FD, buf, sizeof(buf)); 271 #ifdef DEBUG 272 buf[len] = '\0'; 273 printf("coursync: (\"%s\")\n\r", buf); 274 #endif 275 if (index(buf, '0') || 276 (index(buf, 'O') && index(buf, 'K'))) 277 return(1); 278 } 279 /* 280 * If not strapped for DTR control, 281 * try to get command mode. 282 */ 283 sleep(1); 284 cour_write(FD, "+++", 3); 285 sleep(1); 286 /* 287 * Toggle DTR to force anyone off that might have left 288 * the modem connected. 289 */ 290 ioctl(FD, TIOCCDTR, 0); 291 sleep(1); 292 ioctl(FD, TIOCSDTR, 0); 293 } 294 cour_write(FD, "\rAT Z\r", 6); 295 return (0); 296 } 297 298 cour_write(fd, cp, n) 299 int fd; 300 char *cp; 301 int n; 302 { 303 struct sgttyb sb; 304 #ifdef notdef 305 if (boolean(value(VERBOSE))) 306 write(1, cp, n); 307 #endif 308 ioctl(fd, TIOCGETP, &sb); 309 ioctl(fd, TIOCSETP, &sb); 310 cour_nap(); 311 for ( ; n-- ; cp++) { 312 write(fd, cp, 1); 313 ioctl(fd, TIOCGETP, &sb); 314 ioctl(fd, TIOCSETP, &sb); 315 cour_nap(); 316 } 317 } 318 319 #ifdef DEBUG 320 verbose_read() 321 { 322 int n = 0; 323 char buf[BUFSIZ]; 324 325 if (ioctl(FD, FIONREAD, &n) < 0) 326 return; 327 if (n <= 0) 328 return; 329 if (read(FD, buf, n) != n) 330 return; 331 write(1, buf, n); 332 } 333 #endif 334 335 /* 336 * Code stolen from /usr/src/lib/libc/gen/sleep.c 337 */ 338 #define mask(s) (1<<((s)-1)) 339 #define setvec(vec, a) \ 340 vec.sv_handler = a; vec.sv_mask = vec.sv_onstack = 0 341 342 static napms = 50; /* Give the courier 50 milliseconds between characters */ 343 344 static int ringring; 345 346 cour_nap() 347 { 348 349 static void cour_napx(); 350 int omask; 351 struct itimerval itv, oitv; 352 register struct itimerval *itp = &itv; 353 struct sigvec vec, ovec; 354 355 timerclear(&itp->it_interval); 356 timerclear(&itp->it_value); 357 if (setitimer(ITIMER_REAL, itp, &oitv) < 0) 358 return; 359 setvec(ovec, SIG_DFL); 360 omask = sigblock(mask(SIGALRM)); 361 itp->it_value.tv_sec = napms/1000; 362 itp->it_value.tv_usec = ((napms%1000)*1000); 363 setvec(vec, cour_napx); 364 ringring = 0; 365 (void) sigvec(SIGALRM, &vec, &ovec); 366 (void) setitimer(ITIMER_REAL, itp, (struct itimerval *)0); 367 while (!ringring) 368 sigpause(omask &~ mask(SIGALRM)); 369 (void) sigvec(SIGALRM, &ovec, (struct sigvec *)0); 370 (void) setitimer(ITIMER_REAL, &oitv, (struct itimerval *)0); 371 (void) sigsetmask(omask); 372 } 373 374 static void 375 cour_napx() 376 { 377 ringring = 1; 378 } 379