usr.bin/tip/libacu/courier.c

   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  * @(#)courier.c        8.1 (Berkeley) 6/6/93
  34  * $DragonFly: src/usr.bin/tip/libacu/courier.c,v 1.3 2005/05/07 23:20:43 corecode Exp $
  35  */
  36
  37 /*
  38  * Routines for calling up on a Courier modem.
  39  * Derived from Hayes driver.
  40  */
  41 #include "tipconf.h"
  42 #include "tip.h"
  43 #include "acucommon.h"
  44 #include <stdio.h>
  45
  46 #define MAXRETRY        5
  47
  48 static  void sigALRM();
  49 static  int cour_connect(void);
  50 static  int cour_swallow(char *);
  51 static  int timeout = 0;
  52 static  int connected = 0;
  53 static  jmp_buf timeoutbuf, intbuf;
  54 static  int coursync();
  55
  56 cour_dialer(num, acu)
  57         register char *num;
  58         char *acu;
  59 {
  60         register char *cp;
  61 #if ACULOG
  62         char line[80];
  63 #endif
  64
  65         if (boolean(value(VERBOSE)))
  66                 printf("Using \"%s\"\n", acu);
  67
  68         acu_hupcl ();
  69
  70         /*
  71          * Get in synch.
  72          */
  73         if (!coursync()) {
  74 badsynch:
  75                 printf("can't synchronize with courier\n");
  76 #if ACULOG
  77                 logent(value(HOST), num, "courier", "can't synch up");
  78 #endif
  79                 return (0);
  80         }
  81         cour_write(FD, "AT E0\r", 6);   /* turn off echoing */
  82         sleep(1);
  83 #ifdef DEBUG
  84         if (boolean(value(VERBOSE)))
  85                 cour_verbose_read();
  86 #endif
  87         ioctl(FD, TIOCFLUSH, 0);        /* flush any clutter */
  88         cour_write(FD, "AT C1 E0 H0 Q0 X6 V1\r", 21);
  89         if (!cour_swallow("\r\nOK\r\n"))
  90                 goto badsynch;
  91         fflush(stdout);
  92         cour_write(FD, "AT D", 4);
  93         for (cp = num; *cp; cp++)
  94                 if (*cp == '=')
  95                         *cp = ',';
  96         cour_write(FD, num, strlen(num));
  97         cour_write(FD, "\r", 1);
  98         connected = cour_connect();
  99 #if ACULOG
 100         if (timeout) {
 101                 sprintf(line, "%d second dial timeout",
 102                         number(value(DIALTIMEOUT)));
 103                 logent(value(HOST), num, "cour", line);
 104         }
 105 #endif
 106         if (timeout)
 107                 cour_disconnect();
 108         return (connected);
 109 }
 110
 111 cour_disconnect()
 112 {
 113          /* first hang up the modem*/
 114         ioctl(FD, TIOCCDTR, 0);
 115         sleep(1);
 116         ioctl(FD, TIOCSDTR, 0);
 117         coursync();                             /* reset */
 118         close(FD);
 119 }
 120
 121 cour_abort()
 122 {
 123         cour_write(FD, "\r", 1);        /* send anything to abort the call */
 124         cour_disconnect();
 125 }
 126
 127 static void
 128 sigALRM()
 129 {
 130         printf("\07timeout waiting for reply\n");
 131         timeout = 1;
 132         longjmp(timeoutbuf, 1);
 133 }
 134
 135 static int
 136 cour_swallow(match)
 137   register char *match;
 138   {
 139         sig_t f;
 140         char c;
 141
 142         f = signal(SIGALRM, sigALRM);
 143         timeout = 0;
 144         do {
 145                 if (*match =='\0') {
 146                         signal(SIGALRM, f);
 147                         return (1);
 148                 }
 149                 if (setjmp(timeoutbuf)) {
 150                         signal(SIGALRM, f);
 151                         return (0);
 152                 }
 153                 alarm(number(value(DIALTIMEOUT)));
 154                 read(FD, &c, 1);
 155                 alarm(0);
 156                 c &= 0177;
 157 #ifdef DEBUG
 158                 if (boolean(value(VERBOSE)))
 159                         putchar(c);
 160 #endif
 161         } while (c == *match++);
 162 #ifdef DEBUG
 163         if (boolean(value(VERBOSE)))
 164                 fflush(stdout);
 165 #endif
 166         signal(SIGALRM, SIG_DFL);
 167         return (0);
 168 }
 169
 170 struct baud_msg {
 171         char *msg;
 172         int baud;
 173 } baud_msg[] = {
 174         "",             B300,
 175         " 1200",        B1200,
 176         " 2400",        B2400,
 177         " 9600",        B9600,
 178         " 9600/ARQ",    B9600,
 179         0,              0,
 180 };
 181
 182 static int
 183 cour_connect()
 184 {
 185         char c;
 186         int nc, nl, n;
 187         char dialer_buf[64];
 188         struct baud_msg *bm;
 189         sig_t f;
 190
 191         if (cour_swallow("\r\n") == 0)
 192                 return (0);
 193         f = signal(SIGALRM, sigALRM);
 194 again:
 195         nc = 0; nl = sizeof(dialer_buf)-1;
 196         bzero(dialer_buf, sizeof(dialer_buf));
 197         timeout = 0;
 198         for (nc = 0, nl = sizeof(dialer_buf)-1 ; nl > 0 ; nc++, nl--) {
 199                 if (setjmp(timeoutbuf))
 200                         break;
 201                 alarm(number(value(DIALTIMEOUT)));
 202                 n = read(FD, &c, 1);
 203                 alarm(0);
 204                 if (n <= 0)
 205                         break;
 206                 c &= 0x7f;
 207                 if (c == '\r') {
 208                         if (cour_swallow("\n") == 0)
 209                                 break;
 210                         if (!dialer_buf[0])
 211                                 goto again;
 212                         if (strcmp(dialer_buf, "RINGING") == 0 &&
 213                             boolean(value(VERBOSE))) {
 214 #ifdef DEBUG
 215                                 printf("%s\r\n", dialer_buf);
 216 #endif
 217                                 goto again;
 218                         }
 219                         if (strncmp(dialer_buf, "CONNECT",
 220                                     sizeof("CONNECT")-1) != 0)
 221                                 break;
 222                         for (bm = baud_msg ; bm->msg ; bm++)
 223                                 if (strcmp(bm->msg,
 224                                     dialer_buf+sizeof("CONNECT")-1) == 0) {
 225                                         if (!acu_setspeed(bm->baud))
 226                                                 goto error;
 227                                         signal(SIGALRM, f);
 228 #ifdef DEBUG
 229                                         if (boolean(value(VERBOSE)))
 230                                                 printf("%s\r\n", dialer_buf);
 231 #endif
 232                                         return (1);
 233                                 }
 234                         break;
 235                 }
 236                 dialer_buf[nc] = c;
 237 #ifdef notdef
 238                 if (boolean(value(VERBOSE)))
 239                         putchar(c);
 240 #endif
 241         }
 242 error1:
 243         printf("%s\r\n", dialer_buf);
 244 error:
 245         signal(SIGALRM, f);
 246         return (0);
 247 }
 248
 249 /*
 250  * This convoluted piece of code attempts to get
 251  * the courier in sync.
 252  */
 253 static int
 254 coursync()
 255 {
 256         int already = 0;
 257         int len;
 258         char buf[40];
 259
 260         while (already++ < MAXRETRY) {
 261                 ioctl(FD, TIOCFLUSH, 0);        /* flush any clutter */
 262                 cour_write(FD, "\rAT Z\r", 6);  /* reset modem */
 263                 bzero(buf, sizeof(buf));
 264                 sleep(1);
 265                 ioctl(FD, FIONREAD, &len);
 266                 if (len) {
 267                         len = read(FD, buf, sizeof(buf));
 268 #ifdef DEBUG
 269                         buf[len] = '\0';
 270                         printf("coursync: (\"%s\")\n\r", buf);
 271 #endif
 272                         if (index(buf, '0') ||
 273                            (index(buf, 'O') && index(buf, 'K')))
 274                                 return(1);
 275                 }
 276                 /*
 277                  * If not strapped for DTR control,
 278                  * try to get command mode.
 279                  */
 280                 sleep(1);
 281                 cour_write(FD, "+++", 3);
 282                 sleep(1);
 283                 /*
 284                  * Toggle DTR to force anyone off that might have left
 285                  * the modem connected.
 286                  */
 287                 ioctl(FD, TIOCCDTR, 0);
 288                 sleep(1);
 289                 ioctl(FD, TIOCSDTR, 0);
 290         }
 291         cour_write(FD, "\rAT Z\r", 6);
 292         return (0);
 293 }
 294
 295 cour_write(fd, cp, n)
 296 int fd;
 297 char *cp;
 298 int n;
 299 {
 300 #ifdef notdef
 301         if (boolean(value(VERBOSE)))
 302                 write(1, cp, n);
 303 #endif
 304         acu_flush ();
 305         cour_nap();
 306         for ( ; n-- ; cp++) {
 307                 write(fd, cp, 1);
 308                 acu_flush ();
 309                 cour_nap();
 310         }
 311 }
 312
 313 #ifdef DEBUG
 314 cour_verbose_read()
 315 {
 316         int n = 0;
 317         char buf[BUFSIZ];
 318
 319         if (ioctl(FD, FIONREAD, &n) < 0)
 320                 return;
 321         if (n <= 0)
 322                 return;
 323         if (read(FD, buf, n) != n)
 324                 return;
 325         write(1, buf, n);
 326 }
 327 #endif
 328
 329 cour_nap()
 330 {
 331         acu_nap (50);
 332 }
 333
 334 /* end of courier.c */