FreeBSD-5.3/usr.bin/tip/libacu/courier.c
/* $OpenBSD: courier.c,v 1.9 2001/10/24 18:38:58 millert Exp $ */
/* $NetBSD: courier.c,v 1.7 1997/02/11 09:24:16 mrg Exp $ */
/*
* Copyright (c) 1986, 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/usr.bin/tip/libacu/courier.c,v 1.6 2003/04/06 08:30:25 imp Exp $");
#ifndef lint
#if 0
static char sccsid[] = "@(#)courier.c 8.1 (Berkeley) 6/6/93";
static char rcsid[] = "$OpenBSD: courier.c,v 1.9 2001/10/24 18:38:58 millert Exp $";
#endif
#endif /* not lint */
/*
* Routines for calling up on a Courier modem.
* Derived from Hayes driver.
*/
#include "tip.h"
#include <sys/ioctl.h>
#include <stdio.h>
#define MAXRETRY 5
static void sigALRM();
static int timeout = 0;
static int connected = 0;
static jmp_buf timeoutbuf, intbuf;
static int coursync(), cour_connect(), cour_swallow();
void cour_nap();
static void cour_write(int fd, char *cp, int n);
void cour_disconnect(void);
int
cour_dialer(num, acu)
char *num;
char *acu;
{
char *cp;
#ifdef ACULOG
char line[80];
#endif
struct termios cntrl;
if (boolean(value(VERBOSE)))
printf("Using \"%s\"\n", acu);
tcgetattr(FD, &cntrl);
cntrl.c_cflag |= HUPCL;
tcsetattr(FD, TCSAFLUSH, &cntrl);
/*
* Get in synch.
*/
if (!coursync()) {
badsynch:
printf("can't synchronize with courier\n");
#ifdef ACULOG
logent(value(HOST), num, "courier", "can't synch up");
#endif
return (0);
}
cour_write(FD, "AT E0\r", 6); /* turn off echoing */
sleep(1);
#ifdef DEBUG
if (boolean(value(VERBOSE)))
cour_verbose_read();
#endif
tcflush(FD, TCIOFLUSH);
cour_write(FD, "AT C1 E0 H0 Q0 X6 V1\r", 21);
if (!cour_swallow("\r\nOK\r\n"))
goto badsynch;
fflush(stdout);
cour_write(FD, "AT D", 4);
for (cp = num; *cp; cp++)
if (*cp == '=')
*cp = ',';
cour_write(FD, num, strlen(num));
cour_write(FD, "\r", 1);
connected = cour_connect();
#ifdef ACULOG
if (timeout) {
(void)sprintf(line, "%ld second dial timeout",
number(value(DIALTIMEOUT)));
logent(value(HOST), num, "cour", line);
}
#endif
if (timeout)
cour_disconnect();
return (connected);
}
void
cour_disconnect()
{
/* first hang up the modem*/
ioctl(FD, TIOCCDTR, 0);
sleep(1);
ioctl(FD, TIOCSDTR, 0);
coursync(); /* reset */
close(FD);
}
void
cour_abort()
{
cour_write(FD, "\r", 1); /* send anything to abort the call */
cour_disconnect();
}
static void
sigALRM()
{
printf("\07timeout waiting for reply\n");
timeout = 1;
longjmp(timeoutbuf, 1);
}
static int
cour_swallow(match)
char *match;
{
sig_t f;
char c;
f = signal(SIGALRM, sigALRM);
timeout = 0;
do {
if (*match =='\0') {
signal(SIGALRM, f);
return (1);
}
if (setjmp(timeoutbuf)) {
signal(SIGALRM, f);
return (0);
}
alarm(number(value(DIALTIMEOUT)));
read(FD, &c, 1);
alarm(0);
c &= 0177;
#ifdef DEBUG
if (boolean(value(VERBOSE)))
putchar(c);
#endif
} while (c == *match++);
#ifdef DEBUG
if (boolean(value(VERBOSE)))
fflush(stdout);
#endif
signal(SIGALRM, SIG_DFL);
return (0);
}
struct baud_msg {
char *msg;
int baud;
} baud_msg[] = {
"", B300,
" 1200", B1200,
" 2400", B2400,
" 9600", B9600,
" 9600/ARQ", B9600,
0, 0,
};
static int
cour_connect()
{
char c;
int nc, nl, n;
char dialer_buf[64];
struct baud_msg *bm;
sig_t f;
if (cour_swallow("\r\n") == 0)
return (0);
f = signal(SIGALRM, sigALRM);
again:
nc = 0; nl = sizeof(dialer_buf)-1;
bzero(dialer_buf, sizeof(dialer_buf));
timeout = 0;
for (nc = 0, nl = sizeof(dialer_buf)-1 ; nl > 0 ; nc++, nl--) {
if (setjmp(timeoutbuf))
break;
alarm(number(value(DIALTIMEOUT)));
n = read(FD, &c, 1);
alarm(0);
if (n <= 0)
break;
c &= 0x7f;
if (c == '\r') {
if (cour_swallow("\n") == 0)
break;
if (!dialer_buf[0])
goto again;
if (strcmp(dialer_buf, "RINGING") == 0 &&
boolean(value(VERBOSE))) {
#ifdef DEBUG
printf("%s\r\n", dialer_buf);
#endif
goto again;
}
if (strncmp(dialer_buf, "CONNECT",
sizeof("CONNECT")-1) != 0)
break;
for (bm = baud_msg ; bm->msg ; bm++)
if (strcmp(bm->msg,
dialer_buf+sizeof("CONNECT")-1) == 0) {
struct termios cntrl;
tcgetattr(FD, &cntrl);
cfsetospeed(&cntrl, bm->baud);
cfsetispeed(&cntrl, bm->baud);
tcsetattr(FD, TCSAFLUSH, &cntrl);
signal(SIGALRM, f);
#ifdef DEBUG
if (boolean(value(VERBOSE)))
printf("%s\r\n", dialer_buf);
#endif
return (1);
}
break;
}
dialer_buf[nc] = c;
#ifdef notdef
if (boolean(value(VERBOSE)))
putchar(c);
#endif
}
printf("%s\r\n", dialer_buf);
signal(SIGALRM, f);
return (0);
}
/*
* This convoluted piece of code attempts to get
* the courier in sync.
*/
static int
coursync()
{
int already = 0;
int len;
char buf[40];
while (already++ < MAXRETRY) {
tcflush(FD, TCIOFLUSH);
cour_write(FD, "\rAT Z\r", 6); /* reset modem */
bzero(buf, sizeof(buf));
sleep(1);
ioctl(FD, FIONREAD, &len);
if (len) {
len = read(FD, buf, sizeof(buf));
#ifdef DEBUG
buf[len] = '\0';
printf("coursync: (\"%s\")\n\r", buf);
#endif
if (strchr(buf, '0') ||
(strchr(buf, 'O') && strchr(buf, 'K')))
return(1);
}
/*
* If not strapped for DTR control,
* try to get command mode.
*/
sleep(1);
cour_write(FD, "+++", 3);
sleep(1);
/*
* Toggle DTR to force anyone off that might have left
* the modem connected.
*/
ioctl(FD, TIOCCDTR, 0);
sleep(1);
ioctl(FD, TIOCSDTR, 0);
}
cour_write(FD, "\rAT Z\r", 6);
return (0);
}
static void
cour_write(fd, cp, n)
int fd;
char *cp;
int n;
{
#ifdef notdef
if (boolean(value(VERBOSE)))
write(1, cp, n);
#endif
tcdrain(fd);
cour_nap();
for ( ; n-- ; cp++) {
write(fd, cp, 1);
tcdrain(fd);
cour_nap();
}
}
#ifdef DEBUG
cour_verbose_read()
{
int n = 0;
char buf[BUFSIZ];
if (ioctl(FD, FIONREAD, &n) < 0)
return;
if (n <= 0)
return;
if (read(FD, buf, n) != n)
return;
write(1, buf, n);
}
#endif
/* Give the courier 50 milliseconds between characters */
void
cour_nap()
{
struct timespec ts;
ts.tv_sec = 0;
ts.tv_nsec = 50 * 1000000;
nanosleep(&ts, NULL);
}