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/* $OpenBSD: ventel.c,v 1.13 2009/10/27 23:59:45 deraadt Exp $ */
/* $NetBSD: ventel.c,v 1.6 1997/02/11 09:24:21 mrg Exp $ */
/*
* Copyright (c) 1983, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Routines for calling up on a Ventel Modem
* The Ventel is expected to be strapped for local echo (just like uucp)
*/
#include "tip.h"
#include <termios.h>
#include <sys/ioctl.h>
#define MAXRETRY 5
static int dialtimeout = 0;
static jmp_buf timeoutbuf;
static void echo(char *);
static void sigALRM(int);
static int gobble(char, char *);
static int vensync(int);
/*
* some sleep calls have been replaced by this macro
* because some ventel modems require two <cr>s in less than
* a second in order to 'wake up'... yes, it is dirty...
*/
#define delay(num,denom) busyloop(CPUSPEED*num/denom)
#define CPUSPEED 1000000 /* VAX 780 is 1MIPS */
#define DELAY(n) do { long N = (n); while (--N > 0); } while (0)
#define busyloop(n) do { DELAY(n); } while (0)
int
ven_dialer(char *num, char *acu)
{
char *cp;
int connected = 0;
char *msg, line[80];
struct termios cntrl;
/*
* Get in synch with a couple of carriage returns
*/
if (!vensync(FD)) {
printf("can't synchronize with ventel\n");
#ifdef ACULOG
logent(value(HOST), num, "ventel", "can't synch up");
#endif
return (0);
}
if (boolean(value(VERBOSE)))
printf("\ndialing...");
fflush(stdout);
tcgetattr(FD, &cntrl);
cntrl.c_cflag |= HUPCL;
tcsetattr(FD, TCSANOW, &cntrl);
echo("#k$\r$\n$D$I$A$L$:$ ");
for (cp = num; *cp; cp++) {
delay(1, 10);
write(FD, cp, 1);
}
delay(1, 10);
write(FD, "\r", 1);
gobble('\n', line);
if (gobble('\n', line))
connected = gobble('!', line);
tcflush(FD, TCIOFLUSH);
#ifdef ACULOG
if (dialtimeout) {
(void)snprintf(line, sizeof line, "%ld second dial timeout",
number(value(DIALTIMEOUT)));
logent(value(HOST), num, "ventel", line);
}
#endif
if (dialtimeout)
ven_disconnect(); /* insurance */
if (connected || dialtimeout || !boolean(value(VERBOSE)))
return (connected);
/* call failed, parse response for user */
cp = strchr(line, '\r');
if (cp)
*cp = '\0';
for (cp = line; (cp = strchr(cp, ' ')) != NULL; cp++)
if (cp[1] == ' ')
break;
if (cp) {
while (*cp == ' ')
cp++;
msg = cp;
while (*cp) {
if (isupper(*cp))
*cp = tolower(*cp);
cp++;
}
printf("%s...", msg);
}
return (connected);
}
void
ven_disconnect(void)
{
close(FD);
}
void
ven_abort(void)
{
write(FD, "\03", 1);
close(FD);
}
static void
echo(char *s)
{
char c;
while ((c = *s++) != NULL)
switch (c) {
case '$':
read(FD, &c, 1);
s++;
break;
case '#':
c = *s++;
write(FD, &c, 1);
break;
default:
write(FD, &c, 1);
read(FD, &c, 1);
}
}
/*ARGSUSED*/
static void
sigALRM(int signo)
{
printf("\07timeout waiting for reply\n");
dialtimeout = 1;
longjmp(timeoutbuf, 1);
}
static int
gobble(char match, char response[])
{
char *cp = response;
sig_t f;
char c;
f = signal(SIGALRM, sigALRM);
dialtimeout = 0;
do {
if (setjmp(timeoutbuf)) {
signal(SIGALRM, f);
*cp = '\0';
return (0);
}
alarm(number(value(DIALTIMEOUT)));
read(FD, cp, 1);
alarm(0);
c = (*cp++ &= 0177);
#ifdef notdef
if (boolean(value(VERBOSE)))
putchar(c);
#endif
} while (c != '\n' && c != match);
signal(SIGALRM, SIG_DFL);
*cp = '\0';
return (c == match);
}
#define min(a,b) ((a)>(b)?(b):(a))
/*
* This convoluted piece of code attempts to get
* the ventel in sync. If you don't have FIONREAD
* there are gory ways to simulate this.
*/
static int
vensync(int fd)
{
int already = 0, nread;
char buf[60];
/*
* Toggle DTR to force anyone off that might have left
* the modem connected, and insure a consistent state
* to start from.
*
* If you don't have the ioctl calls to diddle directly
* with DTR, you can always try setting the baud rate to 0.
*/
ioctl(FD, TIOCCDTR, 0);
sleep(1);
ioctl(FD, TIOCSDTR, 0);
while (already < MAXRETRY) {
/*
* After reseting the modem, send it two \r's to
* autobaud on. Make sure to delay between them
* so the modem can frame the incoming characters.
*/
write(fd, "\r", 1);
delay(1,10);
write(fd, "\r", 1);
sleep(2);
if (ioctl(fd, FIONREAD, (caddr_t)&nread) < 0) {
perror("tip: ioctl");
continue;
}
while (nread > 0) {
read(fd, buf, min(nread, 60));
if ((buf[nread - 1] & 0177) == '$')
return (1);
nread -= min(nread, 60);
}
sleep(1);
already++;
}
return (0);
}
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