1 /* $OpenBSD: t3000.c,v 1.14 2006/03/17 19:17:13 moritz Exp $ */ 2 /* $NetBSD: t3000.c,v 1.5 1997/02/11 09:24:18 mrg Exp $ */ 3 4 /*- 5 * SPDX-License-Identifier: BSD-3-Clause 6 * 7 * Copyright (c) 1992, 1993 8 * The Regents of the University of California. All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)t3000.c 8.1 (Berkeley) 6/6/93"; 41 static const char rcsid[] = "$OpenBSD: t3000.c,v 1.14 2006/03/17 19:17:13 moritz Exp $"; 42 #endif 43 #endif /* not lint */ 44 45 /* 46 * Routines for calling up on a Telebit T3000 modem. 47 * Derived from Courier driver. 48 */ 49 #include "tip.h" 50 51 #include <sys/ioctl.h> 52 #include <stdio.h> 53 54 #define MAXRETRY 5 55 56 static int dialtimeout = 0; 57 static int connected = 0; 58 static jmp_buf timeoutbuf; 59 60 static void sigALRM(int); 61 static int t3000_swallow(char *); 62 static int t3000_connect(void); 63 static int t3000_sync(void); 64 static void t3000_write(int, char *, int); 65 static void t3000_nap(void); 66 #ifdef DEBUG 67 static void t3000_verbose_read(void); 68 #endif 69 70 int 71 t3000_dialer(char *num, char *acu) 72 { 73 char *cp; 74 struct termios cntrl; 75 #ifdef ACULOG 76 char line[80]; 77 #endif 78 79 if (boolean(value(VERBOSE))) 80 printf("Using \"%s\"\n", acu); 81 82 tcgetattr(FD, &cntrl); 83 cntrl.c_cflag |= HUPCL; 84 tcsetattr(FD, TCSANOW, &cntrl); 85 /* 86 * Get in synch. 87 */ 88 if (!t3000_sync()) { 89 badsynch: 90 printf("can't synchronize with t3000\n"); 91 #ifdef ACULOG 92 logent(value(HOST), num, "t3000", "can't synch up"); 93 #endif 94 return (0); 95 } 96 t3000_write(FD, "AT E0\r", 6); /* turn off echoing */ 97 sleep(1); 98 #ifdef DEBUG 99 if (boolean(value(VERBOSE))) 100 t3000_verbose_read(); 101 #endif 102 tcflush(FD, TCIOFLUSH); 103 t3000_write(FD, "AT E0 H0 Q0 X4 V1\r", 18); 104 if (!t3000_swallow("\r\nOK\r\n")) 105 goto badsynch; 106 fflush(stdout); 107 t3000_write(FD, "AT D", 4); 108 for (cp = num; *cp; cp++) 109 if (*cp == '=') 110 *cp = ','; 111 t3000_write(FD, num, strlen(num)); 112 t3000_write(FD, "\r", 1); 113 connected = t3000_connect(); 114 #ifdef ACULOG 115 if (dialtimeout) { 116 (void)snprintf(line, sizeof line, "%ld second dial timeout", 117 number(value(DIALTIMEOUT))); 118 logent(value(HOST), num, "t3000", line); 119 } 120 #endif 121 if (dialtimeout) 122 t3000_disconnect(); 123 return (connected); 124 } 125 126 void 127 t3000_disconnect(void) 128 { 129 /* first hang up the modem*/ 130 ioctl(FD, TIOCCDTR, 0); 131 sleep(1); 132 ioctl(FD, TIOCSDTR, 0); 133 t3000_sync(); /* reset */ 134 close(FD); 135 } 136 137 void 138 t3000_abort(void) 139 { 140 t3000_write(FD, "\r", 1); /* send anything to abort the call */ 141 t3000_disconnect(); 142 } 143 144 /*ARGSUSED*/ 145 static void 146 sigALRM(int signo) 147 { 148 printf("\07timeout waiting for reply\n"); 149 dialtimeout = 1; 150 longjmp(timeoutbuf, 1); 151 } 152 153 static int 154 t3000_swallow(char *match) 155 { 156 sig_t f; 157 char c; 158 159 f = signal(SIGALRM, sigALRM); 160 dialtimeout = 0; 161 do { 162 if (*match =='\0') { 163 signal(SIGALRM, f); 164 return (1); 165 } 166 if (setjmp(timeoutbuf)) { 167 signal(SIGALRM, f); 168 return (0); 169 } 170 alarm(number(value(DIALTIMEOUT))); 171 read(FD, &c, 1); 172 alarm(0); 173 c &= 0177; 174 #ifdef DEBUG 175 if (boolean(value(VERBOSE))) 176 putchar(c); 177 #endif 178 } while (c == *match++); 179 #ifdef DEBUG 180 if (boolean(value(VERBOSE))) 181 fflush(stdout); 182 #endif 183 signal(SIGALRM, SIG_DFL); 184 return (0); 185 } 186 187 #ifndef B19200 /* XXX */ 188 #define B19200 EXTA 189 #define B38400 EXTB 190 #endif 191 192 struct tbaud_msg { 193 char *msg; 194 int baud; 195 int baud2; 196 } tbaud_msg[] = { 197 { "", B300, 0 }, 198 { " 1200", B1200, 0 }, 199 { " 2400", B2400, 0 }, 200 { " 4800", B4800, 0 }, 201 { " 9600", B9600, 0 }, 202 { " 14400", B19200, B9600 }, 203 { " 19200", B19200, B9600 }, 204 { " 38400", B38400, B9600 }, 205 { " 57600", B38400, B9600 }, 206 { " 7512", B9600, 0 }, 207 { " 1275", B2400, 0 }, 208 { " 7200", B9600, 0 }, 209 { " 12000", B19200, B9600 }, 210 { 0, 0, 0 }, 211 }; 212 213 static int 214 t3000_connect(void) 215 { 216 char c; 217 int nc, nl, n; 218 char dialer_buf[64]; 219 struct tbaud_msg *bm; 220 sig_t f; 221 222 if (t3000_swallow("\r\n") == 0) 223 return (0); 224 f = signal(SIGALRM, sigALRM); 225 again: 226 nc = 0; nl = sizeof(dialer_buf)-1; 227 bzero(dialer_buf, sizeof(dialer_buf)); 228 dialtimeout = 0; 229 for (nc = 0, nl = sizeof(dialer_buf)-1 ; nl > 0 ; nc++, nl--) { 230 if (setjmp(timeoutbuf)) 231 break; 232 alarm(number(value(DIALTIMEOUT))); 233 n = read(FD, &c, 1); 234 alarm(0); 235 if (n <= 0) 236 break; 237 c &= 0x7f; 238 if (c == '\r') { 239 if (t3000_swallow("\n") == 0) 240 break; 241 if (!dialer_buf[0]) 242 goto again; 243 if (strcmp(dialer_buf, "RINGING") == 0 && 244 boolean(value(VERBOSE))) { 245 #ifdef DEBUG 246 printf("%s\r\n", dialer_buf); 247 #endif 248 goto again; 249 } 250 if (strncmp(dialer_buf, "CONNECT", 251 sizeof("CONNECT")-1) != 0) 252 break; 253 for (bm = tbaud_msg ; bm->msg ; bm++) 254 if (strcmp(bm->msg, 255 dialer_buf+sizeof("CONNECT")-1) == 0) { 256 struct termios cntrl; 257 258 tcgetattr(FD, &cntrl); 259 cfsetospeed(&cntrl, bm->baud); 260 cfsetispeed(&cntrl, bm->baud); 261 tcsetattr(FD, TCSAFLUSH, &cntrl); 262 signal(SIGALRM, f); 263 #ifdef DEBUG 264 if (boolean(value(VERBOSE))) 265 printf("%s\r\n", dialer_buf); 266 #endif 267 return (1); 268 } 269 break; 270 } 271 dialer_buf[nc] = c; 272 #ifdef notdef 273 if (boolean(value(VERBOSE))) 274 putchar(c); 275 #endif 276 } 277 printf("%s\r\n", dialer_buf); 278 signal(SIGALRM, f); 279 return (0); 280 } 281 282 /* 283 * This convoluted piece of code attempts to get 284 * the t3000 in sync. 285 */ 286 static int 287 t3000_sync(void) 288 { 289 int already = 0; 290 int len; 291 char buf[40]; 292 293 while (already++ < MAXRETRY) { 294 tcflush(FD, TCIOFLUSH); 295 t3000_write(FD, "\rAT Z\r", 6); /* reset modem */ 296 bzero(buf, sizeof(buf)); 297 sleep(2); 298 ioctl(FD, FIONREAD, &len); 299 #if 1 300 if (len == 0) len = 1; 301 #endif 302 if (len) { 303 len = read(FD, buf, sizeof(buf)); 304 #ifdef DEBUG 305 buf[len] = '\0'; 306 printf("t3000_sync: (\"%s\")\n\r", buf); 307 #endif 308 if (strchr(buf, '0') || 309 (strchr(buf, 'O') && strchr(buf, 'K'))) 310 return(1); 311 } 312 /* 313 * If not strapped for DTR control, 314 * try to get command mode. 315 */ 316 sleep(1); 317 t3000_write(FD, "+++", 3); 318 sleep(1); 319 /* 320 * Toggle DTR to force anyone off that might have left 321 * the modem connected. 322 */ 323 ioctl(FD, TIOCCDTR, 0); 324 sleep(1); 325 ioctl(FD, TIOCSDTR, 0); 326 } 327 t3000_write(FD, "\rAT Z\r", 6); 328 return (0); 329 } 330 331 static void 332 t3000_write(int fd, char *cp, int n) 333 { 334 #ifdef notdef 335 if (boolean(value(VERBOSE))) 336 write(1, cp, n); 337 #endif 338 tcdrain(fd); 339 t3000_nap(); 340 for ( ; n-- ; cp++) { 341 write(fd, cp, 1); 342 tcdrain(fd); 343 t3000_nap(); 344 } 345 } 346 347 #ifdef DEBUG 348 static void 349 t3000_verbose_read(void) 350 { 351 int n = 0; 352 char buf[BUFSIZ]; 353 354 if (ioctl(FD, FIONREAD, &n) < 0) 355 return; 356 if (n <= 0) 357 return; 358 if (read(FD, buf, n) != n) 359 return; 360 write(1, buf, n); 361 } 362 #endif 363 364 /* Give the t3000 50 milliseconds between characters */ 365 static void 366 t3000_nap(void) 367 { 368 struct timespec ts; 369 370 ts.tv_sec = 0; 371 ts.tv_nsec = 50 * 1000000; 372 373 nanosleep(&ts, NULL); 374 } 375