t3000.c revision 1.14
1 /* $NetBSD: t3000.c,v 1.14 2006/12/14 14:18:04 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)t3000.c 8.1 (Berkeley) 6/6/93"; 36 #endif 37 __RCSID("$NetBSD: t3000.c,v 1.14 2006/12/14 14:18:04 christos Exp $"); 38 #endif /* not lint */ 39 40 /* 41 * Routines for calling up on a Telebit T3000 modem. 42 * Derived from Courier driver. 43 */ 44 #include "tip.h" 45 46 #define MAXRETRY 5 47 48 static int timeout = 0; 49 static int connected = 0; 50 static jmp_buf timeoutbuf; 51 52 static void sigALRM(int); 53 static int t3000_connect(void); 54 static void t3000_nap(void); 55 static void t3000_napx(int); 56 static int t3000_swallow(const char *); 57 static int t3000_sync(void); 58 static void t3000_write(int, const char *, int); 59 60 int 61 t3000_dialer(char *num, char *acu) 62 { 63 char *cp; 64 struct termios cntrl; 65 66 if (boolean(value(VERBOSE))) 67 printf("Using \"%s\"\n", acu); 68 69 tcgetattr(FD, &cntrl); 70 cntrl.c_cflag |= HUPCL; 71 tcsetattr(FD, TCSANOW, &cntrl); 72 /* 73 * Get in synch. 74 */ 75 if (!t3000_sync()) { 76 badsynch: 77 printf("can't synchronize with t3000\n"); 78 return (0); 79 } 80 t3000_write(FD, "AT E0\r", 6); /* turn off echoing */ 81 sleep(1); 82 #ifdef DEBUG 83 if (boolean(value(VERBOSE))) 84 t3000_verbose_read(); 85 #endif 86 tcflush(FD, TCIOFLUSH); 87 t3000_write(FD, "AT E0 H0 Q0 X4 V1\r", 18); 88 if (!t3000_swallow("\r\nOK\r\n")) 89 goto badsynch; 90 fflush(stdout); 91 t3000_write(FD, "AT D", 4); 92 for (cp = num; *cp; cp++) 93 if (*cp == '=') 94 *cp = ','; 95 t3000_write(FD, num, strlen(num)); 96 t3000_write(FD, "\r", 1); 97 connected = t3000_connect(); 98 if (timeout) 99 t3000_disconnect(); 100 return (connected); 101 } 102 103 void 104 t3000_disconnect(void) 105 { 106 /* first hang up the modem*/ 107 ioctl(FD, TIOCCDTR, 0); 108 sleep(1); 109 ioctl(FD, TIOCSDTR, 0); 110 t3000_sync(); /* reset */ 111 close(FD); 112 } 113 114 void 115 t3000_abort(void) 116 { 117 t3000_write(FD, "\r", 1); /* send anything to abort the call */ 118 t3000_disconnect(); 119 } 120 121 static void 122 sigALRM(int dummy) 123 { 124 printf("\07timeout waiting for reply\n"); 125 timeout = 1; 126 longjmp(timeoutbuf, 1); 127 } 128 129 static int 130 t3000_swallow(const char * volatile match) 131 { 132 sig_t f; 133 char c; 134 135 f = signal(SIGALRM, sigALRM); 136 timeout = 0; 137 do { 138 if (*match =='\0') { 139 signal(SIGALRM, f); 140 return (1); 141 } 142 if (setjmp(timeoutbuf)) { 143 signal(SIGALRM, f); 144 return (0); 145 } 146 alarm(number(value(DIALTIMEOUT))); 147 read(FD, &c, 1); 148 alarm(0); 149 c &= 0177; 150 #ifdef DEBUG 151 if (boolean(value(VERBOSE))) 152 putchar(c); 153 #endif 154 } while (c == *match++); 155 #ifdef DEBUG 156 if (boolean(value(VERBOSE))) 157 fflush(stdout); 158 #endif 159 signal(SIGALRM, SIG_DFL); 160 return (0); 161 } 162 163 #ifndef B19200 /* XXX */ 164 #define B19200 EXTA 165 #define B38400 EXTB 166 #endif 167 168 struct tbaud_msg { 169 const char *msg; 170 int baud; 171 int baud2; 172 } tbaud_msg[] = { 173 { "", B300, 0 }, 174 { " 1200", B1200, 0 }, 175 { " 2400", B2400, 0 }, 176 { " 4800", B4800, 0 }, 177 { " 9600", B9600, 0 }, 178 { " 14400", B19200, B9600 }, 179 { " 19200", B19200, B9600 }, 180 { " 38400", B38400, B9600 }, 181 { " 57600", B38400, B9600 }, 182 { " 7512", B9600, 0 }, 183 { " 1275", B2400, 0 }, 184 { " 7200", B9600, 0 }, 185 { " 12000", B19200, B9600 }, 186 { 0, 0, 0 }, 187 }; 188 189 static int 190 t3000_connect(void) 191 { 192 char c; 193 int volatile nc; 194 int volatile nl; 195 int n; 196 char dialer_buf[64]; 197 struct tbaud_msg *bm; 198 sig_t f; 199 200 if (t3000_swallow("\r\n") == 0) 201 return (0); 202 f = signal(SIGALRM, sigALRM); 203 again: 204 memset(dialer_buf, 0, sizeof(dialer_buf)); 205 timeout = 0; 206 for (nc = 0, nl = sizeof(dialer_buf)-1 ; nl > 0 ; nc++, nl--) { 207 if (setjmp(timeoutbuf)) 208 break; 209 alarm(number(value(DIALTIMEOUT))); 210 n = read(FD, &c, 1); 211 alarm(0); 212 if (n <= 0) 213 break; 214 c &= 0x7f; 215 if (c == '\r') { 216 if (t3000_swallow("\n") == 0) 217 break; 218 if (!dialer_buf[0]) 219 goto again; 220 if (strcmp(dialer_buf, "RINGING") == 0 && 221 boolean(value(VERBOSE))) { 222 #ifdef DEBUG 223 printf("%s\r\n", dialer_buf); 224 #endif 225 goto again; 226 } 227 if (strncmp(dialer_buf, "CONNECT", 228 sizeof("CONNECT")-1) != 0) 229 break; 230 for (bm = tbaud_msg ; bm->msg ; bm++) 231 if (strcmp(bm->msg, 232 dialer_buf+sizeof("CONNECT")-1) == 0) { 233 struct termios cntrl; 234 235 tcgetattr(FD, &cntrl); 236 cfsetospeed(&cntrl, bm->baud); 237 cfsetispeed(&cntrl, bm->baud); 238 tcsetattr(FD, TCSAFLUSH, &cntrl); 239 signal(SIGALRM, f); 240 #ifdef DEBUG 241 if (boolean(value(VERBOSE))) 242 printf("%s\r\n", dialer_buf); 243 #endif 244 return (1); 245 } 246 break; 247 } 248 dialer_buf[nc] = c; 249 #ifdef notdef 250 if (boolean(value(VERBOSE))) 251 putchar(c); 252 #endif 253 } 254 printf("%s\r\n", dialer_buf); 255 signal(SIGALRM, f); 256 return (0); 257 } 258 259 /* 260 * This convoluted piece of code attempts to get 261 * the t3000 in sync. 262 */ 263 static int 264 t3000_sync(void) 265 { 266 int already = 0; 267 int len; 268 char buf[40]; 269 270 while (already++ < MAXRETRY) { 271 tcflush(FD, TCIOFLUSH); 272 t3000_write(FD, "\rAT Z\r", 6); /* reset modem */ 273 memset(buf, 0, sizeof(buf)); 274 sleep(2); 275 ioctl(FD, FIONREAD, &len); 276 #if 1 277 if (len == 0) len = 1; 278 #endif 279 if (len) { 280 len = read(FD, buf, sizeof(buf)); 281 #ifdef DEBUG 282 buf[len] = '\0'; 283 printf("t3000_sync: (\"%s\")\n\r", buf); 284 #endif 285 if (strchr(buf, '0') || 286 (strchr(buf, 'O') && strchr(buf, 'K'))) 287 return(1); 288 } 289 /* 290 * If not strapped for DTR control, 291 * try to get command mode. 292 */ 293 sleep(1); 294 t3000_write(FD, "+++", 3); 295 sleep(1); 296 /* 297 * Toggle DTR to force anyone off that might have left 298 * the modem connected. 299 */ 300 ioctl(FD, TIOCCDTR, 0); 301 sleep(1); 302 ioctl(FD, TIOCSDTR, 0); 303 } 304 t3000_write(FD, "\rAT Z\r", 6); 305 return (0); 306 } 307 308 static void 309 t3000_write(int fd, const char *cp, int n) 310 { 311 312 #ifdef notdef 313 if (boolean(value(VERBOSE))) 314 write(1, cp, n); 315 #endif 316 tcdrain(fd); 317 t3000_nap(); 318 for ( ; n-- ; cp++) { 319 write(fd, cp, 1); 320 tcdrain(fd); 321 t3000_nap(); 322 } 323 } 324 325 #ifdef DEBUG 326 t3000_verbose_read(void) 327 { 328 int n = 0; 329 char buf[BUFSIZ]; 330 331 if (ioctl(FD, FIONREAD, &n) < 0) 332 return; 333 if (n <= 0) 334 return; 335 if (read(FD, buf, n) != n) 336 return; 337 write(1, buf, n); 338 } 339 #endif 340 341 #define setsa(sa, a) \ 342 sa.sa_handler = a; sigemptyset(&sa.sa_mask); sa.sa_flags = 0 343 344 static int napms = 50; /* Give the t3000 50 milliseconds between characters */ 345 346 static int ringring; 347 348 void 349 t3000_nap(void) 350 { 351 352 struct itimerval itv, oitv; 353 struct itimerval *itp = &itv; 354 struct sigaction sa, osa; 355 sigset_t sm, osm; 356 357 timerclear(&itp->it_interval); 358 timerclear(&itp->it_value); 359 if (setitimer(ITIMER_REAL, itp, &oitv) < 0) 360 return; 361 362 sigemptyset(&sm); 363 sigaddset(&sm, SIGALRM); 364 (void)sigprocmask(SIG_BLOCK, &sm, &osm); 365 366 itp->it_value.tv_sec = napms/1000; 367 itp->it_value.tv_usec = ((napms%1000)*1000); 368 369 setsa(sa, t3000_napx); 370 (void)sigaction(SIGALRM, &sa, &osa); 371 372 (void)setitimer(ITIMER_REAL, itp, NULL); 373 374 sm = osm; 375 sigdelset(&sm, SIGALRM); 376 377 for (ringring = 0; !ringring; ) 378 sigsuspend(&sm); 379 380 (void)sigaction(SIGALRM, &osa, NULL); 381 (void)setitimer(ITIMER_REAL, &oitv, NULL); 382 (void)sigprocmask(SIG_SETMASK, &osm, NULL); 383 } 384 385 static void 386 t3000_napx(int dummy) 387 { 388 389 ringring = 1; 390 } 391
Indexes created Wed Sep 24 05:09:52 GMT 2025