| 1 | /* |
| 2 | * Copyright (c) 1986 The Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms are permitted |
| 6 | * provided that the above copyright notice and this paragraph are |
| 7 | * duplicated in all such forms and that any documentation, |
| 8 | * advertising materials, and other materials related to such |
| 9 | * distribution and use acknowledge that the software was developed |
| 10 | * by the University of California, Berkeley. The name of the |
| 11 | * University may not be used to endorse or promote products derived |
| 12 | * from this software without specific prior written permission. |
| 13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
| 14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
| 15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| 16 | */ |
| 17 | |
| 18 | #ifndef lint |
| 19 | static char sccsid[] = "@(#)courier.c 5.3 (Berkeley) %G%"; |
| 20 | #endif /* not lint */ |
| 21 | |
| 22 | #define write cour_write |
| 23 | /* |
| 24 | * Routines for calling up on a Courier modem. |
| 25 | * Derived from Hayes driver. |
| 26 | */ |
| 27 | #include "tip.h" |
| 28 | #include <stdio.h> |
| 29 | |
| 30 | #define MAXRETRY 5 |
| 31 | |
| 32 | static int sigALRM(); |
| 33 | static int timeout = 0; |
| 34 | static int connected = 0; |
| 35 | static jmp_buf timeoutbuf, intbuf; |
| 36 | static int (*osigint)(); |
| 37 | |
| 38 | cour_dialer(num, acu) |
| 39 | register char *num; |
| 40 | char *acu; |
| 41 | { |
| 42 | register char *cp; |
| 43 | #ifdef ACULOG |
| 44 | char line[80]; |
| 45 | #endif |
| 46 | if (boolean(value(VERBOSE))) |
| 47 | printf("Using \"%s\"\n", acu); |
| 48 | |
| 49 | ioctl(FD, TIOCHPCL, 0); |
| 50 | /* |
| 51 | * Get in synch. |
| 52 | */ |
| 53 | if (!coursync()) { |
| 54 | badsynch: |
| 55 | printf("can't synchronize with courier\n"); |
| 56 | #ifdef ACULOG |
| 57 | logent(value(HOST), num, "courier", "can't synch up"); |
| 58 | #endif |
| 59 | return (0); |
| 60 | } |
| 61 | write(FD, "AT E0\r", 6); /* turn off echoing */ |
| 62 | sleep(1); |
| 63 | #ifdef DEBUG |
| 64 | if (boolean(value(VERBOSE))) |
| 65 | verbose_read(); |
| 66 | #endif |
| 67 | ioctl(FD, TIOCFLUSH, 0); /* flush any clutter */ |
| 68 | write(FD, "AT C1 E0 H0 Q0 X6 V1\r", 21); |
| 69 | if (!cour_swallow("\r\nOK\r\n")) |
| 70 | goto badsynch; |
| 71 | fflush(stdout); |
| 72 | write(FD, "AT D", 4); |
| 73 | for (cp = num; *cp; cp++) |
| 74 | if (*cp == '=') |
| 75 | *cp = ','; |
| 76 | write(FD, num, strlen(num)); |
| 77 | write(FD, "\r", 1); |
| 78 | connected = cour_connect(); |
| 79 | #ifdef ACULOG |
| 80 | if (timeout) { |
| 81 | sprintf(line, "%d second dial timeout", |
| 82 | number(value(DIALTIMEOUT))); |
| 83 | logent(value(HOST), num, "cour", line); |
| 84 | } |
| 85 | #endif |
| 86 | if (timeout) |
| 87 | cour_disconnect(); |
| 88 | return (connected); |
| 89 | } |
| 90 | |
| 91 | cour_disconnect() |
| 92 | { |
| 93 | /* first hang up the modem*/ |
| 94 | ioctl(FD, TIOCCDTR, 0); |
| 95 | sleep(1); |
| 96 | ioctl(FD, TIOCSDTR, 0); |
| 97 | coursync(); /* reset */ |
| 98 | close(FD); |
| 99 | } |
| 100 | |
| 101 | cour_abort() |
| 102 | { |
| 103 | write(FD, "\r", 1); /* send anything to abort the call */ |
| 104 | cour_disconnect(); |
| 105 | } |
| 106 | |
| 107 | static int |
| 108 | sigALRM() |
| 109 | { |
| 110 | printf("\07timeout waiting for reply\n"); |
| 111 | timeout = 1; |
| 112 | longjmp(timeoutbuf, 1); |
| 113 | } |
| 114 | |
| 115 | static int |
| 116 | cour_swallow(match) |
| 117 | register char *match; |
| 118 | { |
| 119 | char c; |
| 120 | int (*f)(); |
| 121 | |
| 122 | f = signal(SIGALRM, sigALRM); |
| 123 | timeout = 0; |
| 124 | do { |
| 125 | if (*match =='\0') { |
| 126 | signal(SIGALRM, f); |
| 127 | return (1); |
| 128 | } |
| 129 | if (setjmp(timeoutbuf)) { |
| 130 | signal(SIGALRM, f); |
| 131 | return (0); |
| 132 | } |
| 133 | alarm(number(value(DIALTIMEOUT))); |
| 134 | read(FD, &c, 1); |
| 135 | alarm(0); |
| 136 | c &= 0177; |
| 137 | #ifdef DEBUG |
| 138 | if (boolean(value(VERBOSE))) |
| 139 | putchar(c); |
| 140 | #endif |
| 141 | } while (c == *match++); |
| 142 | #ifdef DEBUG |
| 143 | if (boolean(value(VERBOSE))) |
| 144 | fflush(stdout); |
| 145 | #endif |
| 146 | signal(SIGALRM, SIG_DFL); |
| 147 | return (0); |
| 148 | } |
| 149 | |
| 150 | struct baud_msg { |
| 151 | char *msg; |
| 152 | int baud; |
| 153 | } baud_msg[] = { |
| 154 | "", B300, |
| 155 | " 1200", B1200, |
| 156 | " 2400", B2400, |
| 157 | 0, 0, |
| 158 | }; |
| 159 | |
| 160 | static int |
| 161 | cour_connect() |
| 162 | { |
| 163 | char c; |
| 164 | int nc, nl, n; |
| 165 | struct sgttyb sb; |
| 166 | char dialer_buf[64]; |
| 167 | struct baud_msg *bm; |
| 168 | int (*f)(); |
| 169 | |
| 170 | if (cour_swallow("\r\n") == 0) |
| 171 | return (0); |
| 172 | f = signal(SIGALRM, sigALRM); |
| 173 | again: |
| 174 | nc = 0; nl = sizeof(dialer_buf)-1; |
| 175 | bzero(dialer_buf, sizeof(dialer_buf)); |
| 176 | timeout = 0; |
| 177 | for (nc = 0, nl = sizeof(dialer_buf)-1 ; nl > 0 ; nc++, nl--) { |
| 178 | if (setjmp(timeoutbuf)) |
| 179 | break; |
| 180 | alarm(number(value(DIALTIMEOUT))); |
| 181 | n = read(FD, &c, 1); |
| 182 | alarm(0); |
| 183 | if (n <= 0) |
| 184 | break; |
| 185 | c &= 0x7f; |
| 186 | if (c == '\r') { |
| 187 | if (cour_swallow("\n") == 0) |
| 188 | break; |
| 189 | if (!dialer_buf[0]) |
| 190 | goto again; |
| 191 | if (strcmp(dialer_buf, "RINGING") == 0 && |
| 192 | boolean(value(VERBOSE))) { |
| 193 | #ifdef DEBUG |
| 194 | printf("%s\r\n", dialer_buf); |
| 195 | #endif |
| 196 | goto again; |
| 197 | } |
| 198 | if (strncmp(dialer_buf, "CONNECT", |
| 199 | sizeof("CONNECT")-1) != 0) |
| 200 | break; |
| 201 | for (bm = baud_msg ; bm ; bm++) |
| 202 | if (strcmp(bm->msg, |
| 203 | dialer_buf+sizeof("CONNECT")-1) == 0) { |
| 204 | if (ioctl(FD, TIOCGETP, &sb) < 0) { |
| 205 | perror("TIOCGETP"); |
| 206 | goto error; |
| 207 | } |
| 208 | sb.sg_ispeed = sb.sg_ospeed = bm->baud; |
| 209 | if (ioctl(FD, TIOCSETP, &sb) < 0) { |
| 210 | perror("TIOCSETP"); |
| 211 | goto error; |
| 212 | } |
| 213 | signal(SIGALRM, f); |
| 214 | #ifdef DEBUG |
| 215 | if (boolean(value(VERBOSE))) |
| 216 | printf("%s\r\n", dialer_buf); |
| 217 | #endif |
| 218 | return (1); |
| 219 | } |
| 220 | break; |
| 221 | } |
| 222 | dialer_buf[nc] = c; |
| 223 | #ifdef notdef |
| 224 | if (boolean(value(VERBOSE))) |
| 225 | putchar(c); |
| 226 | #endif |
| 227 | } |
| 228 | error1: |
| 229 | printf("%s\r\n", dialer_buf); |
| 230 | error: |
| 231 | signal(SIGALRM, f); |
| 232 | return (0); |
| 233 | } |
| 234 | |
| 235 | /* |
| 236 | * This convoluted piece of code attempts to get |
| 237 | * the courier in sync. |
| 238 | */ |
| 239 | static int |
| 240 | coursync() |
| 241 | { |
| 242 | int already = 0; |
| 243 | int len; |
| 244 | char buf[40]; |
| 245 | |
| 246 | while (already++ < MAXRETRY) { |
| 247 | ioctl(FD, TIOCFLUSH, 0); /* flush any clutter */ |
| 248 | write(FD, "\rAT Z\r", 6); /* reset modem */ |
| 249 | bzero(buf, sizeof(buf)); |
| 250 | sleep(1); |
| 251 | ioctl(FD, FIONREAD, &len); |
| 252 | if (len) { |
| 253 | len = read(FD, buf, sizeof(buf)); |
| 254 | #ifdef DEBUG |
| 255 | buf[len] = '\0'; |
| 256 | printf("coursync: (\"%s\")\n\r", buf); |
| 257 | #endif |
| 258 | if (index(buf, '0') || |
| 259 | (index(buf, 'O') && index(buf, 'K'))) |
| 260 | return(1); |
| 261 | } |
| 262 | /* |
| 263 | * If not strapped for DTR control, |
| 264 | * try to get command mode. |
| 265 | */ |
| 266 | sleep(1); |
| 267 | write(FD, "+++", 3); |
| 268 | sleep(1); |
| 269 | /* |
| 270 | * Toggle DTR to force anyone off that might have left |
| 271 | * the modem connected. |
| 272 | */ |
| 273 | ioctl(FD, TIOCCDTR, 0); |
| 274 | sleep(1); |
| 275 | ioctl(FD, TIOCSDTR, 0); |
| 276 | } |
| 277 | write(FD, "\rAT Z\r", 6); |
| 278 | return (0); |
| 279 | } |
| 280 | |
| 281 | #undef write |
| 282 | |
| 283 | cour_write(fd, cp, n) |
| 284 | int fd; |
| 285 | char *cp; |
| 286 | int n; |
| 287 | { |
| 288 | struct sgttyb sb; |
| 289 | #ifdef notdef |
| 290 | if (boolean(value(VERBOSE))) |
| 291 | write(1, cp, n); |
| 292 | #endif |
| 293 | ioctl(fd, TIOCGETP, &sb); |
| 294 | ioctl(fd, TIOCSETP, &sb); |
| 295 | cour_nap(); |
| 296 | for ( ; n-- ; cp++) { |
| 297 | write(fd, cp, 1); |
| 298 | ioctl(fd, TIOCGETP, &sb); |
| 299 | ioctl(fd, TIOCSETP, &sb); |
| 300 | cour_nap(); |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | #ifdef DEBUG |
| 305 | verbose_read() |
| 306 | { |
| 307 | int n = 0; |
| 308 | char buf[BUFSIZ]; |
| 309 | |
| 310 | if (ioctl(FD, FIONREAD, &n) < 0) |
| 311 | return; |
| 312 | if (n <= 0) |
| 313 | return; |
| 314 | if (read(FD, buf, n) != n) |
| 315 | return; |
| 316 | write(1, buf, n); |
| 317 | } |
| 318 | #endif |
| 319 | |
| 320 | /* |
| 321 | * Code stolen from /usr/src/lib/libc/gen/sleep.c |
| 322 | */ |
| 323 | #include <sys/time.h> |
| 324 | |
| 325 | #define mask(s) (1<<((s)-1)) |
| 326 | #define setvec(vec, a) \ |
| 327 | vec.sv_handler = a; vec.sv_mask = vec.sv_onstack = 0 |
| 328 | |
| 329 | static napms = 50; /* Give the courier 50 milliseconds between characters */ |
| 330 | |
| 331 | static int ringring; |
| 332 | |
| 333 | cour_nap() |
| 334 | { |
| 335 | |
| 336 | static int cour_napx(); |
| 337 | int omask; |
| 338 | struct itimerval itv, oitv; |
| 339 | register struct itimerval *itp = &itv; |
| 340 | struct sigvec vec, ovec; |
| 341 | |
| 342 | timerclear(&itp->it_interval); |
| 343 | timerclear(&itp->it_value); |
| 344 | if (setitimer(ITIMER_REAL, itp, &oitv) < 0) |
| 345 | return; |
| 346 | setvec(ovec, SIG_DFL); |
| 347 | omask = sigblock(mask(SIGALRM)); |
| 348 | itp->it_value.tv_sec = napms/1000; |
| 349 | itp->it_value.tv_usec = ((napms%1000)*1000); |
| 350 | setvec(vec, cour_napx); |
| 351 | ringring = 0; |
| 352 | (void) sigvec(SIGALRM, &vec, &ovec); |
| 353 | (void) setitimer(ITIMER_REAL, itp, (struct itimerval *)0); |
| 354 | while (!ringring) |
| 355 | sigpause(omask &~ mask(SIGALRM)); |
| 356 | (void) sigvec(SIGALRM, &ovec, (struct sigvec *)0); |
| 357 | (void) setitimer(ITIMER_REAL, &oitv, (struct itimerval *)0); |
| 358 | (void) sigsetmask(omask); |
| 359 | } |
| 360 | |
| 361 | static |
| 362 | cour_napx() |
| 363 | { |
| 364 | ringring = 1; |
| 365 | } |