usr.bin/tip/aculib/biz31.c

   1 /*      $NetBSD: biz31.c,v 1.11 2006/04/03 02:25:27 perry Exp $ */
   2
   3 /*
   4  * Copyright (c) 1983, 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[] = "@(#)biz31.c     8.1 (Berkeley) 6/6/93";
  36 #endif
  37 __RCSID("$NetBSD: biz31.c,v 1.11 2006/04/03 02:25:27 perry Exp $");
  38 #endif /* not lint */
  39
  40 #include "tip.h"
  41
  42 #define MAXRETRY        3               /* sync up retry count */
  43 #define DISCONNECT_CMD  "\21\25\11\24"  /* disconnection string */
  44
  45 static  void sigALRM(int);
  46 static  int timeout = 0;
  47 static  jmp_buf timeoutbuf;
  48
  49 static void echo(const char *);
  50 static int detect(const char *);
  51 static void flush(const char *);
  52 static int bizsync(int);
  53
  54 /*
  55  * Dial up on a BIZCOMP Model 1031 with either
  56  *      tone dialing (mod = "f")
  57  *      pulse dialing (mod = "w")
  58  */
  59 static int
  60 biz_dialer(char *num, const char *mod)
  61 {
  62         int connected = 0;
  63
  64         if (!bizsync(FD)) {
  65                 logent(value(HOST), "", "biz", "out of sync");
  66                 (void)printf("bizcomp out of sync\n");
  67                 exit(0);
  68         }
  69         if (boolean(value(VERBOSE)))
  70                 (void)printf("\nstarting call...");
  71         echo("#\rk$\r$\n");                     /* disable auto-answer */
  72         echo("$>$.$ #\r");                      /* tone/pulse dialing */
  73         echo(mod);
  74         echo("$\r$\n");
  75         echo("$>$.$ #\re$ ");                   /* disconnection sequence */
  76         echo(DISCONNECT_CMD);
  77         echo("\r$\n$\r$\n");
  78         echo("$>$.$ #\rr$ ");                   /* repeat dial */
  79         echo(num);
  80         echo("\r$\n");
  81         if (boolean(value(VERBOSE)))
  82                 (void)printf("ringing...");
  83         /*
  84          * The reply from the BIZCOMP should be:
  85          *      `^G NO CONNECTION\r\n^G\r\n'    failure
  86          *      ` CONNECTION\r\n^G'             success
  87          */
  88         connected = detect(" ");
  89         if (!connected)
  90                 flush(" NO CONNECTION\r\n\07\r\n");
  91         else
  92                 flush("CONNECTION\r\n\07");
  93         if (timeout)
  94                 biz31_disconnect();     /* insurance */
  95         return (connected);
  96 }
  97
  98 int
  99 /*ARGSUSED*/
 100 biz31w_dialer(char *num, char *acu __unused)
 101 {
 102
 103         return (biz_dialer(num, "w"));
 104 }
 105
 106 int
 107 /*ARGSUSED*/
 108 biz31f_dialer(char *num, char *acu __unused)
 109 {
 110
 111         return (biz_dialer(num, "f"));
 112 }
 113
 114 void
 115 biz31_disconnect(void)
 116 {
 117
 118         (void)write(FD, DISCONNECT_CMD, 4);
 119         (void)sleep(2);
 120         (void)tcflush(FD, TCIOFLUSH);
 121 }
 122
 123 void
 124 biz31_abort(void)
 125 {
 126
 127         (void)write(FD, "\33", 1);
 128 }
 129
 130 static void
 131 echo(const char *s)
 132 {
 133         char c;
 134
 135         while ((c = *s++) != '\0')
 136                 switch (c) {
 137                 case '$':
 138                         (void)read(FD, &c, 1);
 139                         s++;
 140                         break;
 141
 142                 case '#':
 143                         c = *s++;
 144                         (void)write(FD, &c, 1);
 145                         break;
 146
 147                 default:
 148                         (void)write(FD, &c, 1);
 149                         (void)read(FD, &c, 1);
 150                 }
 151 }
 152
 153 static void
 154 /*ARGSUSED*/
 155 sigALRM(int signo __unused)
 156 {
 157
 158         timeout = 1;
 159         longjmp(timeoutbuf, 1);
 160 }
 161
 162 static int
 163 detect(const char *s)
 164 {
 165         sig_t f;
 166         char c;
 167
 168         f = signal(SIGALRM, sigALRM);
 169         timeout = 0;
 170         while (*s) {
 171                 if (setjmp(timeoutbuf)) {
 172                         (void)printf("\07timeout waiting for reply\n");
 173                         biz31_abort();
 174                         break;
 175                 }
 176                 (void)alarm((unsigned)number(value(DIALTIMEOUT)));
 177                 (void)read(FD, &c, 1);
 178                 (void)alarm(0);
 179                 if (c != *s++)
 180                         break;
 181         }
 182         (void)signal(SIGALRM, f);
 183         return (timeout == 0);
 184 }
 185
 186 static void
 187 flush(const char *s)
 188 {
 189         sig_t f;
 190         char c;
 191
 192         f = signal(SIGALRM, sigALRM);
 193         while (*s++) {
 194                 if (setjmp(timeoutbuf))
 195                         break;
 196                 (void)alarm(10);
 197                 (void)read(FD, &c, 1);
 198                 (void)alarm(0);
 199         }
 200         (void)signal(SIGALRM, f);
 201         timeout = 0;                    /* guard against disconnection */
 202 }
 203
 204 /*
 205  * This convoluted piece of code attempts to get
 206  *  the bizcomp in sync.  If you don't have the capacity or nread
 207  *  call there are gory ways to simulate this.
 208  */
 209 static int
 210 bizsync(int fd)
 211 {
 212 #ifdef FIOCAPACITY
 213         struct capacity b;
 214 #       define chars(b) ((b).cp_nbytes)
 215 #       define IOCTL    FIOCAPACITY
 216 #endif
 217 #ifdef FIONREAD
 218         long b;
 219 #       define chars(b) (b)
 220 #       define IOCTL    FIONREAD
 221 #endif
 222         int already = 0;
 223         char buf[10];
 224
 225 retry:
 226         if (ioctl(fd, IOCTL, &b) >= 0 && chars(b) > 0)
 227                 (void)tcflush(FD, TCIOFLUSH);
 228         (void)write(fd, "\rp>\r", 4);
 229         (void)sleep(1);
 230         if (ioctl(fd, IOCTL, &b) >= 0) {
 231                 if (chars(b) != 10) {
 232         nono:
 233                         if (already > MAXRETRY)
 234                                 return (0);
 235                         (void)write(fd, DISCONNECT_CMD, 4);
 236                         (void)sleep(2);
 237                         already++;
 238                         goto retry;
 239                 } else {
 240                         (void)read(fd, buf, 10);
 241                         if (strncmp(buf, "p >\r\n\r\n>", 8))
 242                                 goto nono;
 243                 }
 244         }
 245         return (1);
 246 }