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biz22.c revision 1.7 
      1 /*	$NetBSD: biz22.c,v 1.7 1997/11/22 07:28:52 lukem 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. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 #ifndef lint
     38 #if 0
     39 static char sccsid[] = "@(#)biz22.c	8.1 (Berkeley) 6/6/93";
     40 #endif
     41 __RCSID("$NetBSD: biz22.c,v 1.7 1997/11/22 07:28:52 lukem Exp $");
     42 #endif /* not lint */
     43 
     44 #include "tip.h"
     45 
     46 #define DISCONNECT_CMD	"\20\04"	/* disconnection string */
     47 
     48 static	int btimeout = 0;
     49 static	jmp_buf timeoutbuf;
     50 
     51 static	int	biz_dialer __P((char *, char *));
     52 static	int	cmd __P((char *));
     53 static	int	detect __P((char *));
     54 static	void	sigALRM __P((int));
     55 
     56 /*
     57  * Dial up on a BIZCOMP Model 1022 with either
     58  * 	tone dialing (mod = "V")
     59  *	pulse dialing (mod = "W")
     60  */
     61 static int
     62 biz_dialer(num, mod)
     63 	char *num, *mod;
     64 {
     65 	int connected = 0;
     66 	char cbuf[40];
     67 
     68 	if (boolean(value(VERBOSE)))
     69 		printf("\nstarting call...");
     70 	/*
     71 	 * Disable auto-answer and configure for tone/pulse
     72 	 *  dialing
     73 	 */
     74 	if (cmd("\02K\r")) {
     75 		printf("can't initialize bizcomp...");
     76 		return (0);
     77 	}
     78 	(void)strncpy(cbuf, "\02.\r", sizeof(cbuf) - 1);
     79 	cbuf[1] = *mod;
     80 	if (cmd(cbuf)) {
     81 		printf("can't set dialing mode...");
     82 		return (0);
     83 	}
     84 	(void)snprintf(cbuf, sizeof cbuf, "\02D%s\r", num);
     85 	write(FD, cbuf, strlen(cbuf));
     86 	if (!detect("7\r")) {
     87 		printf("can't get dial tone...");
     88 		return (0);
     89 	}
     90 	if (boolean(value(VERBOSE)))
     91 		printf("ringing...");
     92 	/*
     93 	 * The reply from the BIZCOMP should be:
     94 	 *	2 \r or 7 \r	failure
     95 	 *	1 \r		success
     96 	 */
     97 	connected = detect("1\r");
     98 #ifdef ACULOG
     99 	if (btimeout) {
    100 		char line[80];
    101 
    102 		(void)snprintf(line, sizeof line, "%d second dial timeout",
    103 			(int)number(value(DIALTIMEOUT)));
    104 		logent(value(HOST), num, "biz1022", line);
    105 	}
    106 #endif
    107 	if (btimeout)
    108 		biz22_disconnect();	/* insurance */
    109 	return (connected);
    110 }
    111 
    112 int
    113 biz22w_dialer(num, acu)
    114 	char *num, *acu;
    115 {
    116 
    117 	return (biz_dialer(num, "W"));
    118 }
    119 
    120 int
    121 biz22f_dialer(num, acu)
    122 	char *num, *acu;
    123 {
    124 
    125 	return (biz_dialer(num, "V"));
    126 }
    127 
    128 void
    129 biz22_disconnect()
    130 {
    131 
    132 	write(FD, DISCONNECT_CMD, 4);
    133 	sleep(2);
    134 	tcflush(FD, TCIOFLUSH);
    135 }
    136 
    137 void
    138 biz22_abort()
    139 {
    140 
    141 	write(FD, "\02", 1);
    142 }
    143 
    144 static void
    145 sigALRM(dummy)
    146 	int dummy;
    147 {
    148 
    149 	btimeout = 1;
    150 	longjmp(timeoutbuf, 1);
    151 }
    152 
    153 static int
    154 cmd(s)
    155 	char *s;
    156 {
    157 	sig_t f;
    158 	char c;
    159 
    160 	write(FD, s, strlen(s));
    161 	f = signal(SIGALRM, sigALRM);
    162 	if (setjmp(timeoutbuf)) {
    163 		biz22_abort();
    164 		signal(SIGALRM, f);
    165 		return (1);
    166 	}
    167 	alarm(number(value(DIALTIMEOUT)));
    168 	read(FD, &c, 1);
    169 	alarm(0);
    170 	signal(SIGALRM, f);
    171 	c &= 0177;
    172 	return (c != '\r');
    173 }
    174 
    175 static int
    176 detect(s)
    177 	char *s;
    178 {
    179 	sig_t f;
    180 	char c;
    181 
    182 #if __GNUC__	/* XXX pacify gcc */
    183 	(void)&s;
    184 #endif
    185 
    186 	f = signal(SIGALRM, sigALRM);
    187 	btimeout = 0;
    188 	while (*s) {
    189 		if (setjmp(timeoutbuf)) {
    190 			biz22_abort();
    191 			break;
    192 		}
    193 		alarm(number(value(DIALTIMEOUT)));
    194 		read(FD, &c, 1);
    195 		alarm(0);
    196 		c &= 0177;
    197 		if (c != *s++)
    198 			return (0);
    199 	}
    200 	signal(SIGALRM, f);
    201 	return (btimeout == 0);
    202 }
    203