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biz22.c revision 1.2 
      1 /*
      2  * Copyright (c) 1983 The Regents of the University of California.
      3  * 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 char sccsid[] = "from: @(#)biz22.c	5.5 (Berkeley) 3/2/91";*/
     36 static char rcsid[] = "$Id: biz22.c,v 1.2 1993/08/01 18:06:54 mycroft Exp $";
     37 #endif /* not lint */
     38 
     39 #include "tip.h"
     40 
     41 #define DISCONNECT_CMD	"\20\04"	/* disconnection string */
     42 
     43 static	void sigALRM();
     44 static	int timeout = 0;
     45 static	jmp_buf timeoutbuf;
     46 
     47 /*
     48  * Dial up on a BIZCOMP Model 1022 with either
     49  * 	tone dialing (mod = "V")
     50  *	pulse dialing (mod = "W")
     51  */
     52 static int
     53 biz_dialer(num, mod)
     54 	char *num, *mod;
     55 {
     56 	register int connected = 0;
     57 	char cbuf[40];
     58 	static int cmd(), detect();
     59 
     60 	if (boolean(value(VERBOSE)))
     61 		printf("\nstarting call...");
     62 	/*
     63 	 * Disable auto-answer and configure for tone/pulse
     64 	 *  dialing
     65 	 */
     66 	if (cmd("\02K\r")) {
     67 		printf("can't initialize bizcomp...");
     68 		return (0);
     69 	}
     70 	strcpy(cbuf, "\02.\r");
     71 	cbuf[1] = *mod;
     72 	if (cmd(cbuf)) {
     73 		printf("can't set dialing mode...");
     74 		return (0);
     75 	}
     76 	strcpy(cbuf, "\02D");
     77 	strcat(cbuf, num);
     78 	strcat(cbuf, "\r");
     79 	write(FD, cbuf, strlen(cbuf));
     80 	if (!detect("7\r")) {
     81 		printf("can't get dial tone...");
     82 		return (0);
     83 	}
     84 	if (boolean(value(VERBOSE)))
     85 		printf("ringing...");
     86 	/*
     87 	 * The reply from the BIZCOMP should be:
     88 	 *	2 \r or 7 \r	failure
     89 	 *	1 \r		success
     90 	 */
     91 	connected = detect("1\r");
     92 #ifdef ACULOG
     93 	if (timeout) {
     94 		char line[80];
     95 
     96 		sprintf(line, "%d second dial timeout",
     97 			number(value(DIALTIMEOUT)));
     98 		logent(value(HOST), num, "biz1022", line);
     99 	}
    100 #endif
    101 	if (timeout)
    102 		biz22_disconnect();	/* insurance */
    103 	return (connected);
    104 }
    105 
    106 biz22w_dialer(num, acu)
    107 	char *num, *acu;
    108 {
    109 
    110 	return (biz_dialer(num, "W"));
    111 }
    112 
    113 biz22f_dialer(num, acu)
    114 	char *num, *acu;
    115 {
    116 
    117 	return (biz_dialer(num, "V"));
    118 }
    119 
    120 biz22_disconnect()
    121 {
    122 	int rw = 2;
    123 
    124 	write(FD, DISCONNECT_CMD, 4);
    125 	sleep(2);
    126 	ioctl(FD, TIOCFLUSH, &rw);
    127 }
    128 
    129 biz22_abort()
    130 {
    131 
    132 	write(FD, "\02", 1);
    133 }
    134 
    135 static void
    136 sigALRM()
    137 {
    138 
    139 	timeout = 1;
    140 	longjmp(timeoutbuf, 1);
    141 }
    142 
    143 static int
    144 cmd(s)
    145 	register char *s;
    146 {
    147 	sig_t f;
    148 	char c;
    149 
    150 	write(FD, s, strlen(s));
    151 	f = signal(SIGALRM, sigALRM);
    152 	if (setjmp(timeoutbuf)) {
    153 		biz22_abort();
    154 		signal(SIGALRM, f);
    155 		return (1);
    156 	}
    157 	alarm(number(value(DIALTIMEOUT)));
    158 	read(FD, &c, 1);
    159 	alarm(0);
    160 	signal(SIGALRM, f);
    161 	c &= 0177;
    162 	return (c != '\r');
    163 }
    164 
    165 static int
    166 detect(s)
    167 	register char *s;
    168 {
    169 	sig_t f;
    170 	char c;
    171 
    172 	f = signal(SIGALRM, sigALRM);
    173 	timeout = 0;
    174 	while (*s) {
    175 		if (setjmp(timeoutbuf)) {
    176 			biz22_abort();
    177 			break;
    178 		}
    179 		alarm(number(value(DIALTIMEOUT)));
    180 		read(FD, &c, 1);
    181 		alarm(0);
    182 		c &= 0177;
    183 		if (c != *s++)
    184 			return (0);
    185 	}
    186 	signal(SIGALRM, f);
    187 	return (timeout == 0);
    188 }
    189