v3451.c

<B>Digital的Unix操作系统VAX 4.2源码</B>

#ifndef lint
static	char	*sccsid = "@(#)v3451.c	4.1		7/17/90";
#endif lint

/************************************************************************
 *									*
 *			Copyright (c) 1983 by				*
 *		Digital Equipment Corporation, Maynard, MA		*
 *			All rights reserved.				*
 *									*
 *   This software is furnished under a license and may be used and	*
 *   copied  only  in accordance with the terms of such license and	*
 *   with the  inclusion  of  the  above  copyright  notice.   This	*
 *   software  or  any  other copies thereof may not be provided or	*
 *   otherwise made available to any other person.  No title to and	*
 *   ownership of the software is hereby transferred.			*
 *									*
 *   This software is  derived  from  software  received  from  the	*
 *   University    of   California,   Berkeley,   and   from   Bell	*
 *   Laboratories.  Use, duplication, or disclosure is  subject  to	*
 *   restrictions  under  license  agreements  with  University  of	*
 *   California and with AT&T.						*
 *									*
 *   The information in this software is subject to change  without	*
 *   notice  and should not be construed as a commitment by Digital	*
 *   Equipment Corporation.						*
 *									*
 *   Digital assumes no responsibility for the use  or  reliability	*
 *   of its software on equipment which is not supplied by Digital.	*
 *									*
 ************************************************************************/


/*
 * Routines for calling up on a Vadic 3451 Modem
 */
#include "tip.h"

static	jmp_buf Sjbuf;

v3451_dialer(num, acu)
	register char *num;
	char *acu;
{
	int ok;
	void (*func)();
	int slow = number(value(BAUDRATE)) < 1200, rw = 2;
	char phone[50];
#ifdef ACULOG
	char line[80];
#endif

	/*
	 * Get in synch
	 */
	vawrite("I\r", 1 + slow);
	vawrite("I\r", 1 + slow);
	vawrite("I\r", 1 + slow);
	vawrite("\005\r", 2 + slow);
	if (!expect("READY")) {
		printf("can't synchronize with vadic 3451\n");
#ifdef ACULOG
		logent(value(HOST), num, "vadic", "can't synch up");
#endif
		return (0);
	}
	ioctl(FD, TIOCHPCL, 0);
	sleep(1);
	vawrite("D\r", 2 + slow);
	if (!expect("NUMBER?")) {
		printf("Vadic will not accept dial command\n");
#ifdef ACULOG
		logent(value(HOST), num, "vadic", "will not accept dial");
#endif
		return (0);
	}
	strcpy(phone, num);
	strcat(phone, "\r");
	vawrite(phone, 1 + slow);
	if (!expect(phone)) {
		printf("Vadic will not accept phone number\n");
#ifdef ACULOG
		logent(value(HOST), num, "vadic", "will not accept number");
#endif
		return (0);
	}
	func = signal(SIGINT,SIG_IGN);
	/*
	 * You cannot interrupt the Vadic when its dialing;
	 * even dropping DTR does not work (definitely a
	 * brain damaged design).
	 */
	vawrite("\r", 1 + slow);
	vawrite("\r", 1 + slow);
	if (!expect("DIALING:")) {
		printf("Vadic failed to dial\n");
#ifdef ACULOG
		logent(value(HOST), num, "vadic", "failed to dial");
#endif
		return (0);
	}
	if (boolean(value(VERBOSE)))
		printf("\ndialing...");
	ok = expect("ON LINE");
	signal(SIGINT, func);
	if (!ok) {
		printf("call failed\n");
#ifdef ACULOG
		logent(value(HOST), num, "vadic", "call failed");
#endif
		return (0);
	}
#ifdef ONDELAY
	/*
	 * At this point, wait for carrier; the ACU told
	 * us things were cool now let's see if this
	 * really is the case.
	 */
	ioctl(FD, TIOCCAR);
	if (setjmp(Sjbuf)) {
		ioctl(FD,TIOCNCAR); /* so writes wont hang if carrier never came up*/
		alarm(0);
		return (0);
	}
	alarm(40);	/* Larry wants a better number */
	ioctl(FD, TIOCWONLINE);	/* suspend, waiting for CD */
	alarm(0);
#endif
	ioctl(FD, TIOCFLUSH, &rw);
	return (1);
}

v3451_disconnect()
{

	close(FD);
}

v3451_abort()
{

	close(FD);
}

static
vawrite(cp, delay)
	register char *cp;
	int delay;
{

	for (; *cp; sleep(delay), cp++)
		write(FD, cp, 1);
}

static
expect(cp)
	register char *cp;
{
	char buf[300];
	register char *rp = buf;
	int alarmtr(), timeout = 30, online = 0;

	if (strcmp(cp, "\"\"") == 0)
		return (1);
	*rp = 0;
	/*
	 * If we are waiting for the Vadic to complete
	 * dialing and get a connection, allow more time
	 * Unfortunately, the Vadic times out 24 seconds after
	 * the last digit is dialed
	 */
	online = strcmp(cp, "ON LINE") == 0;
	if (online)
		timeout = number(value(DIALTIMEOUT));
	signal(SIGALRM, alarmtr);
	if (setjmp(Sjbuf)) {
		ioctl(FD,TIOCNCAR); /* so writes wont hang if carrier never came up*/
		return (0);
	}
	alarm(timeout);
	while (notin(cp, buf) && rp < buf + sizeof (buf) - 1) {
		if (online && notin("FAILED CALL", buf) == 0)
			return (0);
		if (read(FD, rp, 1) < 0) {
			alarm(0);
			return (0);
		}
		if (*rp &= 0177)
			rp++;
		*rp = '\0';
	}
	alarm(0);
	return (1);
}

static
alarmtr()
{

	longjmp(Sjbuf, 1);
}

static
notin(sh, lg)
	char *sh, *lg;
{

	for (; *lg; lg++)
		if (prefix(sh, lg))
			return (0);
	return (1);
}

static
prefix(s1, s2)
	register char *s1, *s2;
{
	register char c;

	while ((c = *s1++) == *s2++)
		if (c == '\0')
			return (1);
	return (c == '\0');
}