usr.bin/tip/aculib/v831.c

   1 /*      $NetBSD: v831.c,v 1.11 2006/04/03 00:51:14 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[] = "@(#)v831.c      8.1 (Berkeley) 6/6/93";
  36 #endif
  37 __RCSID("$NetBSD: v831.c,v 1.11 2006/04/03 00:51:14 perry Exp $");
  38 #endif /* not lint */
  39
  40 /*
  41  * Routines for dialing up on Vadic 831
  42  */
  43 #include "tip.h"
  44
  45 static jmp_buf jmpbuf;
  46 static int child = -1;
  47
  48 static  void    alarmtr(int);
  49 static  int     dialit(char *, char *);
  50 static  char   *sanitize(char *);
  51
  52 int
  53 v831_dialer(char *num, char *acu)
  54 {
  55         int status, mypid;
  56         int timelim;
  57
  58         if (boolean(value(VERBOSE)))
  59                 (void)printf("\nstarting call...");
  60 #ifdef DEBUG
  61         (void)printf("(acu=%s)\n", acu);
  62 #endif
  63         if ((AC = open(acu, O_RDWR)) < 0) {
  64                 if (errno == EBUSY)
  65                         (void)printf("line busy...");
  66                 else
  67                         (void)printf("acu open error...");
  68                 return (0);
  69         }
  70         if (setjmp(jmpbuf)) {
  71                 (void)kill(child, SIGKILL);
  72                 (void)close(AC);
  73                 return (0);
  74         }
  75         (void)signal(SIGALRM, alarmtr);
  76         timelim = 5 * strlen(num);
  77         (void)alarm((unsigned)(timelim < 30 ? 30 : timelim));
  78         if ((child = fork()) == 0) {
  79                 /*
  80                  * ignore this stuff for aborts
  81                  */
  82                 (void)signal(SIGALRM, SIG_IGN);
  83                 (void)signal(SIGINT, SIG_IGN);
  84                 (void)signal(SIGQUIT, SIG_IGN);
  85                 (void)sleep(2);
  86                 exit(dialit(num, acu) != 'A');
  87         }
  88         /*
  89          * open line - will return on carrier
  90          */
  91         if ((FD = open(DV, O_RDWR)) < 0) {
  92 #ifdef DEBUG
  93                 (void)printf("(after open, errno=%d)\n", errno);
  94 #endif
  95                 if (errno == EIO)
  96                         (void)printf("lost carrier...");
  97                 else
  98                         (void)printf("dialup line open failed...");
  99                 (void)alarm(0);
 100                 (void)kill(child, SIGKILL);
 101                 (void)close(AC);
 102                 return (0);
 103         }
 104         (void)alarm(0);
 105         (void)signal(SIGALRM, SIG_DFL);
 106         while ((mypid = wait(&status)) != child && mypid != -1)
 107                 ;
 108         if (status) {
 109                 (void)close(AC);
 110                 return (0);
 111         }
 112         return (1);
 113 }
 114
 115 static void
 116 /*ARGSUSED*/
 117 alarmtr(int dummy __unused)
 118 {
 119
 120         (void)alarm(0);
 121         longjmp(jmpbuf, 1);
 122 }
 123
 124 /*
 125  * Insurance, for some reason we don't seem to be
 126  *  hanging up...
 127  */
 128 void
 129 v831_disconnect(void)
 130 {
 131         struct termios  cntrl;
 132
 133         (void)sleep(2);
 134 #ifdef DEBUG
 135         (void)printf("[disconnect: FD=%d]\n", FD);
 136 #endif
 137         if (FD > 0) {
 138                 (void)ioctl(FD, TIOCCDTR, 0);
 139                 (void)tcgetattr(FD, &cntrl);
 140                 (void)cfsetospeed(&cntrl, 0);
 141                 (void)cfsetispeed(&cntrl, 0);
 142                 (void)tcsetattr(FD, TCSAFLUSH, &cntrl);
 143                 (void)ioctl(FD, TIOCNXCL, NULL);
 144         }
 145         (void)close(FD);
 146 }
 147
 148 void
 149 v831_abort(void)
 150 {
 151
 152 #ifdef DEBUG
 153         (void)printf("[abort: AC=%d]\n", AC);
 154 #endif
 155         (void)sleep(2);
 156         if (child > 0)
 157                 (void)kill(child, SIGKILL);
 158         if (AC > 0)
 159                 (void)ioctl(FD, TIOCNXCL, NULL);
 160                 (void)close(AC);
 161         if (FD > 0)
 162                 (void)ioctl(FD, TIOCCDTR, 0);
 163         (void)close(FD);
 164 }
 165
 166 /*
 167  * Sigh, this probably must be changed at each site.
 168  */
 169 struct vaconfig {
 170         const char      *vc_name;
 171         char    vc_rack;
 172         char    vc_modem;
 173 } vaconfig[] = {
 174         { "/dev/cua0",'4','0' },
 175         { "/dev/cua1",'4','1' },
 176         { 0, '\0', '\0' }
 177 };
 178
 179 #define pc(x)   (void)(c = x, write(AC,&c,1))
 180 #define ABORT   01
 181 #define SI      017
 182 #define STX     02
 183 #define ETX     03
 184
 185 static int
 186 dialit(char *phonenum, char *acu)
 187 {
 188         struct vaconfig *vp;
 189         struct termios cntrl;
 190         char c;
 191         int i;
 192
 193         phonenum = sanitize(phonenum);
 194 #ifdef DEBUG
 195         (void)printf("(dial phonenum=%s)\n", phonenum);
 196 #endif
 197         if (*phonenum == '<' && phonenum[1] == 0)
 198                 return ('Z');
 199         for (vp = vaconfig; vp->vc_name; vp++)
 200                 if (strcmp(vp->vc_name, acu) == 0)
 201                         break;
 202         if (vp->vc_name == 0) {
 203                 (void)printf("Unable to locate dialer (%s)\n", acu);
 204                 return ('K');
 205         }
 206         (void)tcgetattr(AC, &cntrl);
 207         (void)cfsetospeed(&cntrl, B2400);
 208         (void)cfsetispeed(&cntrl, B2400);
 209         cntrl.c_cflag |= PARODD | PARENB;
 210         cntrl.c_lflag &= ~(ISIG | ICANON);
 211         (void)tcsetattr(AC, TCSANOW, &cntrl);
 212         (void)tcflush(AC, TCIOFLUSH);
 213         pc(STX);
 214         pc(vp->vc_rack);
 215         pc(vp->vc_modem);
 216         while (*phonenum && *phonenum != '<')
 217                 pc(*phonenum++);
 218         pc(SI);
 219         pc(ETX);
 220         (void)sleep(1);
 221         i = read(AC, &c, 1);
 222 #ifdef DEBUG
 223         (void)printf("read %d chars, char=%c, errno %d\n", i, c, errno);
 224 #endif
 225         if (i != 1)
 226                 c = 'M';
 227         if (c == 'B' || c == 'G') {
 228                 char cc, oc = c;
 229
 230                 pc(ABORT);
 231                 (void)read(AC, &cc, 1);
 232 #ifdef DEBUG
 233                 (void)printf("abort response=%c\n", cc);
 234 #endif
 235                 c = oc;
 236                 v831_disconnect();
 237         }
 238         (void)close(AC);
 239 #ifdef DEBUG
 240         (void)printf("dialit: returns %c\n", c);
 241 #endif
 242         return (c);
 243 }
 244
 245 static char *
 246 sanitize(char *s)
 247 {
 248         static char buf[128];
 249         char *cp;
 250
 251         for (cp = buf; *s && buf + sizeof buf - cp > 1; s++) {
 252                 if (!isdigit((unsigned char)*s) && *s == '<' && *s != '_')
 253                         continue;
 254                 if (*s == '_')
 255                         *s = '=';
 256                 *cp++ = *s;
 257         }
 258         *cp++ = 0;
 259         return (buf);
 260 }