courier.c revision 1.4
1 /* $NetBSD: courier.c,v 1.4 1994/12/08 09:31:35 jtc Exp $ */ 2 3 /* 4 * Copyright (c) 1986, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)courier.c 8.1 (Berkeley) 6/6/93"; 39 #endif 40 static char rcsid[] = "$NetBSD: courier.c,v 1.4 1994/12/08 09:31:35 jtc Exp $"; 41 #endif /* not lint */ 42 43 /* 44 * Routines for calling up on a Courier modem. 45 * Derived from Hayes driver. 46 */ 47 #include "tip.h" 48 #include <stdio.h> 49 50 #define MAXRETRY 5 51 52 static void sigALRM(); 53 static int timeout = 0; 54 static int connected = 0; 55 static jmp_buf timeoutbuf, intbuf; 56 static int coursync(); 57 58 cour_dialer(num, acu) 59 register char *num; 60 char *acu; 61 { 62 register char *cp; 63 #ifdef ACULOG 64 char line[80]; 65 #endif 66 static int cour_connect(), cour_swallow(); 67 68 if (boolean(value(VERBOSE))) 69 printf("Using \"%s\"\n", acu); 70 71 ioctl(FD, TIOCHPCL, 0); 72 /* 73 * Get in synch. 74 */ 75 if (!coursync()) { 76 badsynch: 77 printf("can't synchronize with courier\n"); 78 #ifdef ACULOG 79 logent(value(HOST), num, "courier", "can't synch up"); 80 #endif 81 return (0); 82 } 83 cour_write(FD, "AT E0\r", 6); /* turn off echoing */ 84 sleep(1); 85 #ifdef DEBUG 86 if (boolean(value(VERBOSE))) 87 cour_verbose_read(); 88 #endif 89 ioctl(FD, TIOCFLUSH, 0); /* flush any clutter */ 90 cour_write(FD, "AT C1 E0 H0 Q0 X6 V1\r", 21); 91 if (!cour_swallow("\r\nOK\r\n")) 92 goto badsynch; 93 fflush(stdout); 94 cour_write(FD, "AT D", 4); 95 for (cp = num; *cp; cp++) 96 if (*cp == '=') 97 *cp = ','; 98 cour_write(FD, num, strlen(num)); 99 cour_write(FD, "\r", 1); 100 connected = cour_connect(); 101 #ifdef ACULOG 102 if (timeout) { 103 sprintf(line, "%d second dial timeout", 104 number(value(DIALTIMEOUT))); 105 logent(value(HOST), num, "cour", line); 106 } 107 #endif 108 if (timeout) 109 cour_disconnect(); 110 return (connected); 111 } 112 113 cour_disconnect() 114 { 115 /* first hang up the modem*/ 116 ioctl(FD, TIOCCDTR, 0); 117 sleep(1); 118 ioctl(FD, TIOCSDTR, 0); 119 coursync(); /* reset */ 120 close(FD); 121 } 122 123 cour_abort() 124 { 125 cour_write(FD, "\r", 1); /* send anything to abort the call */ 126 cour_disconnect(); 127 } 128 129 static void 130 sigALRM() 131 { 132 printf("\07timeout waiting for reply\n"); 133 timeout = 1; 134 longjmp(timeoutbuf, 1); 135 } 136 137 static int 138 cour_swallow(match) 139 register char *match; 140 { 141 sig_t f; 142 char c; 143 144 f = signal(SIGALRM, sigALRM); 145 timeout = 0; 146 do { 147 if (*match =='\0') { 148 signal(SIGALRM, f); 149 return (1); 150 } 151 if (setjmp(timeoutbuf)) { 152 signal(SIGALRM, f); 153 return (0); 154 } 155 alarm(number(value(DIALTIMEOUT))); 156 read(FD, &c, 1); 157 alarm(0); 158 c &= 0177; 159 #ifdef DEBUG 160 if (boolean(value(VERBOSE))) 161 putchar(c); 162 #endif 163 } while (c == *match++); 164 #ifdef DEBUG 165 if (boolean(value(VERBOSE))) 166 fflush(stdout); 167 #endif 168 signal(SIGALRM, SIG_DFL); 169 return (0); 170 } 171 172 struct baud_msg { 173 char *msg; 174 int baud; 175 } baud_msg[] = { 176 "", B300, 177 " 1200", B1200, 178 " 2400", B2400, 179 " 9600", B9600, 180 " 9600/ARQ", B9600, 181 0, 0, 182 }; 183 184 static int 185 cour_connect() 186 { 187 char c; 188 int nc, nl, n; 189 struct sgttyb sb; 190 char dialer_buf[64]; 191 struct baud_msg *bm; 192 sig_t f; 193 194 if (cour_swallow("\r\n") == 0) 195 return (0); 196 f = signal(SIGALRM, sigALRM); 197 again: 198 nc = 0; nl = sizeof(dialer_buf)-1; 199 bzero(dialer_buf, sizeof(dialer_buf)); 200 timeout = 0; 201 for (nc = 0, nl = sizeof(dialer_buf)-1 ; nl > 0 ; nc++, nl--) { 202 if (setjmp(timeoutbuf)) 203 break; 204 alarm(number(value(DIALTIMEOUT))); 205 n = read(FD, &c, 1); 206 alarm(0); 207 if (n <= 0) 208 break; 209 c &= 0x7f; 210 if (c == '\r') { 211 if (cour_swallow("\n") == 0) 212 break; 213 if (!dialer_buf[0]) 214 goto again; 215 if (strcmp(dialer_buf, "RINGING") == 0 && 216 boolean(value(VERBOSE))) { 217 #ifdef DEBUG 218 printf("%s\r\n", dialer_buf); 219 #endif 220 goto again; 221 } 222 if (strncmp(dialer_buf, "CONNECT", 223 sizeof("CONNECT")-1) != 0) 224 break; 225 for (bm = baud_msg ; bm->msg ; bm++) 226 if (strcmp(bm->msg, 227 dialer_buf+sizeof("CONNECT")-1) == 0) { 228 if (ioctl(FD, TIOCGETP, &sb) < 0) { 229 perror("TIOCGETP"); 230 goto error; 231 } 232 sb.sg_ispeed = sb.sg_ospeed = bm->baud; 233 if (ioctl(FD, TIOCSETP, &sb) < 0) { 234 perror("TIOCSETP"); 235 goto error; 236 } 237 signal(SIGALRM, f); 238 #ifdef DEBUG 239 if (boolean(value(VERBOSE))) 240 printf("%s\r\n", dialer_buf); 241 #endif 242 return (1); 243 } 244 break; 245 } 246 dialer_buf[nc] = c; 247 #ifdef notdef 248 if (boolean(value(VERBOSE))) 249 putchar(c); 250 #endif 251 } 252 error1: 253 printf("%s\r\n", dialer_buf); 254 error: 255 signal(SIGALRM, f); 256 return (0); 257 } 258 259 /* 260 * This convoluted piece of code attempts to get 261 * the courier in sync. 262 */ 263 static int 264 coursync() 265 { 266 int already = 0; 267 int len; 268 char buf[40]; 269 270 while (already++ < MAXRETRY) { 271 ioctl(FD, TIOCFLUSH, 0); /* flush any clutter */ 272 cour_write(FD, "\rAT Z\r", 6); /* reset modem */ 273 bzero(buf, sizeof(buf)); 274 sleep(1); 275 ioctl(FD, FIONREAD, &len); 276 if (len) { 277 len = read(FD, buf, sizeof(buf)); 278 #ifdef DEBUG 279 buf[len] = '\0'; 280 printf("coursync: (\"%s\")\n\r", buf); 281 #endif 282 if (index(buf, '0') || 283 (index(buf, 'O') && index(buf, 'K'))) 284 return(1); 285 } 286 /* 287 * If not strapped for DTR control, 288 * try to get command mode. 289 */ 290 sleep(1); 291 cour_write(FD, "+++", 3); 292 sleep(1); 293 /* 294 * Toggle DTR to force anyone off that might have left 295 * the modem connected. 296 */ 297 ioctl(FD, TIOCCDTR, 0); 298 sleep(1); 299 ioctl(FD, TIOCSDTR, 0); 300 } 301 cour_write(FD, "\rAT Z\r", 6); 302 return (0); 303 } 304 305 cour_write(fd, cp, n) 306 int fd; 307 char *cp; 308 int n; 309 { 310 struct sgttyb sb; 311 #ifdef notdef 312 if (boolean(value(VERBOSE))) 313 write(1, cp, n); 314 #endif 315 ioctl(fd, TIOCGETP, &sb); 316 ioctl(fd, TIOCSETP, &sb); 317 cour_nap(); 318 for ( ; n-- ; cp++) { 319 write(fd, cp, 1); 320 ioctl(fd, TIOCGETP, &sb); 321 ioctl(fd, TIOCSETP, &sb); 322 cour_nap(); 323 } 324 } 325 326 #ifdef DEBUG 327 cour_verbose_read() 328 { 329 int n = 0; 330 char buf[BUFSIZ]; 331 332 if (ioctl(FD, FIONREAD, &n) < 0) 333 return; 334 if (n <= 0) 335 return; 336 if (read(FD, buf, n) != n) 337 return; 338 write(1, buf, n); 339 } 340 #endif 341 342 /* 343 * Code stolen from /usr/src/lib/libc/gen/sleep.c 344 */ 345 #define mask(s) (1<<((s)-1)) 346 #define setvec(vec, a) \ 347 vec.sv_handler = a; vec.sv_mask = vec.sv_onstack = 0 348 349 static napms = 50; /* Give the courier 50 milliseconds between characters */ 350 351 static int ringring; 352 353 cour_nap() 354 { 355 356 static void cour_napx(); 357 int omask; 358 struct itimerval itv, oitv; 359 register struct itimerval *itp = &itv; 360 struct sigvec vec, ovec; 361 362 timerclear(&itp->it_interval); 363 timerclear(&itp->it_value); 364 if (setitimer(ITIMER_REAL, itp, &oitv) < 0) 365 return; 366 setvec(ovec, SIG_DFL); 367 omask = sigblock(mask(SIGALRM)); 368 itp->it_value.tv_sec = napms/1000; 369 itp->it_value.tv_usec = ((napms%1000)*1000); 370 setvec(vec, cour_napx); 371 ringring = 0; 372 (void) sigvec(SIGALRM, &vec, &ovec); 373 (void) setitimer(ITIMER_REAL, itp, (struct itimerval *)0); 374 while (!ringring) 375 sigpause(omask &~ mask(SIGALRM)); 376 (void) sigvec(SIGALRM, &ovec, (struct sigvec *)0); 377 (void) setitimer(ITIMER_REAL, &oitv, (struct itimerval *)0); 378 (void) sigsetmask(omask); 379 } 380 381 static void 382 cour_napx() 383 { 384 ringring = 1; 385 } 386
Indexes created Thu Sep 25 16:09:42 GMT 2025