1 /* 2 * Copyright (c) 1986, 1993 3 * The Regents of the University of California. 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 const char rcsid[] = 36 "$FreeBSD$"; 37 #endif 38 39 /* 40 * Routines for calling up on a Courier modem. 41 * Derived from Hayes driver. 42 */ 43 #include "tipconf.h" 44 #include "tip.h" 45 #include "acucommon.h" 46 #include <stdio.h> 47 #include <unistd.h> 48 49 #define MAXRETRY 5 50 51 static void sigALRM(); 52 static int timeout = 0; 53 static int connected = 0; 54 static jmp_buf timeoutbuf, intbuf; 55 static int coursync(); 56 57 cour_dialer(num, acu) 58 register char *num; 59 char *acu; 60 { 61 register char *cp; 62 #if ACULOG 63 char line[80]; 64 #endif 65 static int cour_connect(), cour_swallow(); 66 67 if (boolean(value(VERBOSE))) 68 printf("Using \"%s\"\n", acu); 69 70 acu_hupcl (); 71 72 /* 73 * Get in synch. 74 */ 75 if (!coursync()) { 76 badsynch: 77 printf("can't synchronize with courier\n"); 78 #if 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 #if 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 char dialer_buf[64]; 190 struct baud_msg *bm; 191 sig_t f; 192 193 if (cour_swallow("\r\n") == 0) 194 return (0); 195 f = signal(SIGALRM, sigALRM); 196 again: 197 nc = 0; nl = sizeof(dialer_buf)-1; 198 bzero(dialer_buf, sizeof(dialer_buf)); 199 timeout = 0; 200 for (nc = 0, nl = sizeof(dialer_buf)-1 ; nl > 0 ; nc++, nl--) { 201 if (setjmp(timeoutbuf)) 202 break; 203 alarm(number(value(DIALTIMEOUT))); 204 n = read(FD, &c, 1); 205 alarm(0); 206 if (n <= 0) 207 break; 208 c &= 0x7f; 209 if (c == '\r') { 210 if (cour_swallow("\n") == 0) 211 break; 212 if (!dialer_buf[0]) 213 goto again; 214 if (strcmp(dialer_buf, "RINGING") == 0 && 215 boolean(value(VERBOSE))) { 216 #ifdef DEBUG 217 printf("%s\r\n", dialer_buf); 218 #endif 219 goto again; 220 } 221 if (strncmp(dialer_buf, "CONNECT", 222 sizeof("CONNECT")-1) != 0) 223 break; 224 for (bm = baud_msg ; bm->msg ; bm++) 225 if (strcmp(bm->msg, 226 dialer_buf+sizeof("CONNECT")-1) == 0) { 227 if (!acu_setspeed(bm->baud)) 228 goto error; 229 signal(SIGALRM, f); 230 #ifdef DEBUG 231 if (boolean(value(VERBOSE))) 232 printf("%s\r\n", dialer_buf); 233 #endif 234 return (1); 235 } 236 break; 237 } 238 dialer_buf[nc] = c; 239 #ifdef notdef 240 if (boolean(value(VERBOSE))) 241 putchar(c); 242 #endif 243 } 244 error1: 245 printf("%s\r\n", dialer_buf); 246 error: 247 signal(SIGALRM, f); 248 return (0); 249 } 250 251 /* 252 * This convoluted piece of code attempts to get 253 * the courier in sync. 254 */ 255 static int 256 coursync() 257 { 258 int already = 0; 259 int len; 260 char buf[40]; 261 262 while (already++ < MAXRETRY) { 263 ioctl(FD, TIOCFLUSH, 0); /* flush any clutter */ 264 cour_write(FD, "\rAT Z\r", 6); /* reset modem */ 265 bzero(buf, sizeof(buf)); 266 sleep(1); 267 ioctl(FD, FIONREAD, &len); 268 if (len) { 269 len = read(FD, buf, sizeof(buf)); 270 #ifdef DEBUG 271 buf[len] = '\0'; 272 printf("coursync: (\"%s\")\n\r", buf); 273 #endif 274 if (index(buf, '0') || 275 (index(buf, 'O') && index(buf, 'K'))) 276 return(1); 277 } 278 /* 279 * If not strapped for DTR control, 280 * try to get command mode. 281 */ 282 sleep(1); 283 cour_write(FD, "+++", 3); 284 sleep(1); 285 /* 286 * Toggle DTR to force anyone off that might have left 287 * the modem connected. 288 */ 289 ioctl(FD, TIOCCDTR, 0); 290 sleep(1); 291 ioctl(FD, TIOCSDTR, 0); 292 } 293 cour_write(FD, "\rAT Z\r", 6); 294 return (0); 295 } 296 297 cour_write(fd, cp, n) 298 int fd; 299 char *cp; 300 int n; 301 { 302 #ifdef notdef 303 if (boolean(value(VERBOSE))) 304 write(STDOUT_FILENO, cp, n); 305 #endif 306 acu_flush (); 307 cour_nap(); 308 for ( ; n-- ; cp++) { 309 write(fd, cp, 1); 310 acu_flush (); 311 cour_nap(); 312 } 313 } 314 315 #ifdef DEBUG 316 cour_verbose_read() 317 { 318 int n = 0; 319 char buf[BUFSIZ]; 320 321 if (ioctl(FD, FIONREAD, &n) < 0) 322 return; 323 if (n <= 0) 324 return; 325 if (read(FD, buf, n) != n) 326 return; 327 write(STDOUT_FILENO, buf, n); 328 } 329 #endif 330 331 cour_nap() 332 { 333 acu_nap (50); 334 } 335 336 /* end of courier.c */ 337