courier.c revision 1.8
1 /* $NetBSD: courier.c,v 1.8 1997/11/22 07:28:53 lukem 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 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)courier.c 8.1 (Berkeley) 6/6/93"; 40 #endif 41 __RCSID("$NetBSD: courier.c,v 1.8 1997/11/22 07:28:53 lukem Exp $"); 42 #endif /* not lint */ 43 44 /* 45 * Routines for calling up on a Courier modem. 46 * Derived from Hayes driver. 47 */ 48 #include "tip.h" 49 50 #define MAXRETRY 5 51 52 static int timeout = 0; 53 static int connected = 0; 54 static jmp_buf timeoutbuf; 55 56 static int cour_connect __P((void)); 57 static void cour_nap __P((void)); 58 static void cour_napx __P((int)); 59 static int cour_swallow __P((char *)); 60 static int coursync __P((void)); 61 #ifdef DEBUG 62 static void cour_verbose_read __P((void)); 63 #endif 64 static void cour_write __P((int, char *, int)); 65 static void sigALRM __P((int)); 66 67 int 68 cour_dialer(num, acu) 69 char *num; 70 char *acu; 71 { 72 char *cp; 73 #ifdef ACULOG 74 char line[80]; 75 #endif 76 struct termios cntrl; 77 78 if (boolean(value(VERBOSE))) 79 printf("Using \"%s\"\n", acu); 80 81 tcgetattr(FD, &cntrl); 82 cntrl.c_cflag |= HUPCL; 83 tcsetattr(FD, TCSAFLUSH, &cntrl); 84 /* 85 * Get in synch. 86 */ 87 if (!coursync()) { 88 badsynch: 89 printf("can't synchronize with courier\n"); 90 #ifdef ACULOG 91 logent(value(HOST), num, "courier", "can't synch up"); 92 #endif 93 return (0); 94 } 95 cour_write(FD, "AT E0\r", 6); /* turn off echoing */ 96 sleep(1); 97 #ifdef DEBUG 98 if (boolean(value(VERBOSE))) 99 cour_verbose_read(); 100 #endif 101 tcflush(FD, TCIOFLUSH); 102 cour_write(FD, "AT C1 E0 H0 Q0 X6 V1\r", 21); 103 if (!cour_swallow("\r\nOK\r\n")) 104 goto badsynch; 105 fflush(stdout); 106 cour_write(FD, "AT D", 4); 107 for (cp = num; *cp; cp++) 108 if (*cp == '=') 109 *cp = ','; 110 cour_write(FD, num, strlen(num)); 111 cour_write(FD, "\r", 1); 112 connected = cour_connect(); 113 #ifdef ACULOG 114 if (timeout) { 115 (void)snprintf(line, sizeof line, "%d second dial timeout", 116 (int)number(value(DIALTIMEOUT))); 117 logent(value(HOST), num, "cour", line); 118 } 119 #endif 120 if (timeout) 121 cour_disconnect(); 122 return (connected); 123 } 124 125 void 126 cour_disconnect() 127 { 128 /* first hang up the modem*/ 129 ioctl(FD, TIOCCDTR, 0); 130 sleep(1); 131 ioctl(FD, TIOCSDTR, 0); 132 coursync(); /* reset */ 133 close(FD); 134 } 135 136 void 137 cour_abort() 138 { 139 cour_write(FD, "\r", 1); /* send anything to abort the call */ 140 cour_disconnect(); 141 } 142 143 static void 144 sigALRM(dummy) 145 int dummy; 146 { 147 printf("\07timeout waiting for reply\n"); 148 timeout = 1; 149 longjmp(timeoutbuf, 1); 150 } 151 152 static int 153 cour_swallow(match) 154 char *match; 155 { 156 sig_t f; 157 char c; 158 159 #if __GNUC__ /* XXX pacify gcc */ 160 (void)&match; 161 #endif 162 163 f = signal(SIGALRM, sigALRM); 164 timeout = 0; 165 do { 166 if (*match =='\0') { 167 signal(SIGALRM, f); 168 return (1); 169 } 170 if (setjmp(timeoutbuf)) { 171 signal(SIGALRM, f); 172 return (0); 173 } 174 alarm(number(value(DIALTIMEOUT))); 175 read(FD, &c, 1); 176 alarm(0); 177 c &= 0177; 178 #ifdef DEBUG 179 if (boolean(value(VERBOSE))) 180 putchar(c); 181 #endif 182 } while (c == *match++); 183 #ifdef DEBUG 184 if (boolean(value(VERBOSE))) 185 fflush(stdout); 186 #endif 187 signal(SIGALRM, SIG_DFL); 188 return (0); 189 } 190 191 struct baud_msg { 192 char *msg; 193 int baud; 194 } baud_msg[] = { 195 { "", B300 }, 196 { " 1200", B1200 }, 197 { " 2400", B2400 }, 198 { " 9600", B9600 }, 199 { " 9600/ARQ", B9600 }, 200 { 0, 0 } 201 }; 202 203 static int 204 cour_connect() 205 { 206 char c; 207 int nc, nl, n; 208 char dialer_buf[64]; 209 struct baud_msg *bm; 210 sig_t f; 211 212 #if __GNUC__ /* XXX pacify gcc */ 213 (void)&nc; 214 (void)&nl; 215 #endif 216 217 if (cour_swallow("\r\n") == 0) 218 return (0); 219 f = signal(SIGALRM, sigALRM); 220 again: 221 nc = 0; nl = sizeof(dialer_buf)-1; 222 memset(dialer_buf, 0, sizeof(dialer_buf)); 223 timeout = 0; 224 for (nc = 0, nl = sizeof(dialer_buf)-1 ; nl > 0 ; nc++, nl--) { 225 if (setjmp(timeoutbuf)) 226 break; 227 alarm(number(value(DIALTIMEOUT))); 228 n = read(FD, &c, 1); 229 alarm(0); 230 if (n <= 0) 231 break; 232 c &= 0x7f; 233 if (c == '\r') { 234 if (cour_swallow("\n") == 0) 235 break; 236 if (!dialer_buf[0]) 237 goto again; 238 if (strcmp(dialer_buf, "RINGING") == 0 && 239 boolean(value(VERBOSE))) { 240 #ifdef DEBUG 241 printf("%s\r\n", dialer_buf); 242 #endif 243 goto again; 244 } 245 if (strncmp(dialer_buf, "CONNECT", 246 sizeof("CONNECT")-1) != 0) 247 break; 248 for (bm = baud_msg ; bm->msg ; bm++) 249 if (strcmp(bm->msg, 250 dialer_buf+sizeof("CONNECT")-1) == 0) { 251 struct termios cntrl; 252 253 tcgetattr(FD, &cntrl); 254 cfsetospeed(&cntrl, bm->baud); 255 cfsetispeed(&cntrl, bm->baud); 256 tcsetattr(FD, TCSAFLUSH, &cntrl); 257 signal(SIGALRM, f); 258 #ifdef DEBUG 259 if (boolean(value(VERBOSE))) 260 printf("%s\r\n", dialer_buf); 261 #endif 262 return (1); 263 } 264 break; 265 } 266 dialer_buf[nc] = c; 267 #ifdef notdef 268 if (boolean(value(VERBOSE))) 269 putchar(c); 270 #endif 271 } 272 printf("%s\r\n", dialer_buf); 273 signal(SIGALRM, f); 274 return (0); 275 } 276 277 /* 278 * This convoluted piece of code attempts to get 279 * the courier in sync. 280 */ 281 static int 282 coursync() 283 { 284 int already = 0; 285 int len; 286 char buf[40]; 287 288 while (already++ < MAXRETRY) { 289 tcflush(FD, TCIOFLUSH); 290 cour_write(FD, "\rAT Z\r", 6); /* reset modem */ 291 memset(buf, 0, sizeof(buf)); 292 sleep(1); 293 ioctl(FD, FIONREAD, &len); 294 if (len) { 295 len = read(FD, buf, sizeof(buf)); 296 #ifdef DEBUG 297 buf[len] = '\0'; 298 printf("coursync: (\"%s\")\n\r", buf); 299 #endif 300 if (strchr(buf, '0') || 301 (strchr(buf, 'O') && strchr(buf, 'K'))) 302 return(1); 303 } 304 /* 305 * If not strapped for DTR control, 306 * try to get command mode. 307 */ 308 sleep(1); 309 cour_write(FD, "+++", 3); 310 sleep(1); 311 /* 312 * Toggle DTR to force anyone off that might have left 313 * the modem connected. 314 */ 315 ioctl(FD, TIOCCDTR, 0); 316 sleep(1); 317 ioctl(FD, TIOCSDTR, 0); 318 } 319 cour_write(FD, "\rAT Z\r", 6); 320 return (0); 321 } 322 323 static void 324 cour_write(fd, cp, n) 325 int fd; 326 char *cp; 327 int n; 328 { 329 #ifdef notdef 330 if (boolean(value(VERBOSE))) 331 write(1, cp, n); 332 #endif 333 tcdrain(fd); 334 cour_nap(); 335 for ( ; n-- ; cp++) { 336 write(fd, cp, 1); 337 tcdrain(fd); 338 cour_nap(); 339 } 340 } 341 342 #ifdef DEBUG 343 static void 344 cour_verbose_read() 345 { 346 int n = 0; 347 char buf[BUFSIZ]; 348 349 if (ioctl(FD, FIONREAD, &n) < 0) 350 return; 351 if (n <= 0) 352 return; 353 if (read(FD, buf, n) != n) 354 return; 355 write(1, buf, n); 356 } 357 #endif 358 359 /* 360 * Code stolen from /usr/src/lib/libc/gen/sleep.c 361 */ 362 #define mask(s) (1<<((s)-1)) 363 #define setvec(vec, a) \ 364 vec.sv_handler = a; vec.sv_mask = vec.sv_onstack = 0 365 366 static napms = 50; /* Give the courier 50 milliseconds between characters */ 367 368 static int ringring; 369 370 void 371 cour_nap() 372 { 373 374 int omask; 375 struct itimerval itv, oitv; 376 struct itimerval *itp = &itv; 377 struct sigvec vec, ovec; 378 379 timerclear(&itp->it_interval); 380 timerclear(&itp->it_value); 381 if (setitimer(ITIMER_REAL, itp, &oitv) < 0) 382 return; 383 setvec(ovec, SIG_DFL); 384 omask = sigblock(mask(SIGALRM)); 385 itp->it_value.tv_sec = napms/1000; 386 itp->it_value.tv_usec = ((napms%1000)*1000); 387 setvec(vec, cour_napx); 388 ringring = 0; 389 (void) sigvec(SIGALRM, &vec, &ovec); 390 (void) setitimer(ITIMER_REAL, itp, (struct itimerval *)0); 391 while (!ringring) 392 sigpause(omask &~ mask(SIGALRM)); 393 (void) sigvec(SIGALRM, &ovec, (struct sigvec *)0); 394 (void) setitimer(ITIMER_REAL, &oitv, (struct itimerval *)0); 395 (void) sigsetmask(omask); 396 } 397 398 static void 399 cour_napx(dummy) 400 int dummy; 401 { 402 ringring = 1; 403 } 404
Indexes created Thu Sep 25 08:09:54 GMT 2025