252 lines
5.8 KiB
C
252 lines
5.8 KiB
C
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/*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)ventel.c 8.1 (Berkeley) 6/6/93";
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#endif /* not lint */
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/*
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* Routines for calling up on a Ventel Modem
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* The Ventel is expected to be strapped for local echo (just like uucp)
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*/
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#include "tip.h"
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#define MAXRETRY 5
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static void sigALRM();
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static int timeout = 0;
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static jmp_buf timeoutbuf;
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/*
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* some sleep calls have been replaced by this macro
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* because some ventel modems require two <cr>s in less than
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* a second in order to 'wake up'... yes, it is dirty...
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*/
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#define delay(num,denom) busyloop(CPUSPEED*num/denom)
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#define CPUSPEED 1000000 /* VAX 780 is 1MIPS */
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#define DELAY(n) { register long N = (n); while (--N > 0); }
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busyloop(n) { DELAY(n); }
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ven_dialer(num, acu)
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register char *num;
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char *acu;
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{
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register char *cp;
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register int connected = 0;
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char *msg, *index(), line[80];
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static int gobble(), vensync();
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static void echo();
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/*
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* Get in synch with a couple of carriage returns
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*/
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if (!vensync(FD)) {
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printf("can't synchronize with ventel\n");
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#ifdef ACULOG
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logent(value(HOST), num, "ventel", "can't synch up");
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#endif
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return (0);
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}
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if (boolean(value(VERBOSE)))
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printf("\ndialing...");
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fflush(stdout);
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ioctl(FD, TIOCHPCL, 0);
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echo("#k$\r$\n$D$I$A$L$:$ ");
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for (cp = num; *cp; cp++) {
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delay(1, 10);
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write(FD, cp, 1);
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}
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delay(1, 10);
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write(FD, "\r", 1);
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gobble('\n', line);
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if (gobble('\n', line))
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connected = gobble('!', line);
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ioctl(FD, TIOCFLUSH);
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#ifdef ACULOG
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if (timeout) {
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sprintf(line, "%d second dial timeout",
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number(value(DIALTIMEOUT)));
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logent(value(HOST), num, "ventel", line);
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}
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#endif
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if (timeout)
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ven_disconnect(); /* insurance */
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if (connected || timeout || !boolean(value(VERBOSE)))
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return (connected);
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/* call failed, parse response for user */
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cp = index(line, '\r');
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if (cp)
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*cp = '\0';
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for (cp = line; cp = index(cp, ' '); cp++)
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if (cp[1] == ' ')
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break;
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if (cp) {
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while (*cp == ' ')
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cp++;
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msg = cp;
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while (*cp) {
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if (isupper(*cp))
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*cp = tolower(*cp);
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cp++;
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}
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printf("%s...", msg);
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}
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return (connected);
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}
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ven_disconnect()
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{
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close(FD);
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}
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ven_abort()
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{
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write(FD, "\03", 1);
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close(FD);
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}
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static void
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echo(s)
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register char *s;
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{
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char c;
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while (c = *s++) switch (c) {
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case '$':
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read(FD, &c, 1);
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s++;
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break;
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case '#':
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c = *s++;
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write(FD, &c, 1);
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break;
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default:
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write(FD, &c, 1);
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read(FD, &c, 1);
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}
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}
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static void
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sigALRM()
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{
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printf("\07timeout waiting for reply\n");
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timeout = 1;
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longjmp(timeoutbuf, 1);
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}
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static int
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gobble(match, response)
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register char match;
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char response[];
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{
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register char *cp = response;
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sig_t f;
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char c;
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f = signal(SIGALRM, sigALRM);
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timeout = 0;
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do {
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if (setjmp(timeoutbuf)) {
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signal(SIGALRM, f);
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*cp = '\0';
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return (0);
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}
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alarm(number(value(DIALTIMEOUT)));
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read(FD, cp, 1);
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alarm(0);
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c = (*cp++ &= 0177);
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#ifdef notdef
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if (boolean(value(VERBOSE)))
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putchar(c);
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#endif
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} while (c != '\n' && c != match);
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signal(SIGALRM, SIG_DFL);
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*cp = '\0';
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return (c == match);
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}
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#define min(a,b) ((a)>(b)?(b):(a))
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/*
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* This convoluted piece of code attempts to get
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* the ventel in sync. If you don't have FIONREAD
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* there are gory ways to simulate this.
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*/
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static int
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vensync(fd)
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{
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int already = 0, nread;
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char buf[60];
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/*
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* Toggle DTR to force anyone off that might have left
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* the modem connected, and insure a consistent state
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* to start from.
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*
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* If you don't have the ioctl calls to diddle directly
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* with DTR, you can always try setting the baud rate to 0.
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*/
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ioctl(FD, TIOCCDTR, 0);
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sleep(1);
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ioctl(FD, TIOCSDTR, 0);
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while (already < MAXRETRY) {
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/*
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* After reseting the modem, send it two \r's to
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* autobaud on. Make sure to delay between them
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* so the modem can frame the incoming characters.
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*/
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write(fd, "\r", 1);
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delay(1,10);
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write(fd, "\r", 1);
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sleep(2);
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if (ioctl(fd, FIONREAD, (caddr_t)&nread) < 0) {
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perror("tip: ioctl");
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continue;
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}
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while (nread > 0) {
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read(fd, buf, min(nread, 60));
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if ((buf[nread - 1] & 0177) == '$')
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return (1);
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nread -= min(nread, 60);
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}
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sleep(1);
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already++;
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}
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return (0);
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}
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