325 lines
7.4 KiB
C
325 lines
7.4 KiB
C
/* $OpenBSD: hayes.c,v 1.8 2001/10/24 18:38:58 millert Exp $ */
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/* $NetBSD: hayes.c,v 1.6 1997/02/11 09:24:17 mrg Exp $ */
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)hayes.c 8.1 (Berkeley) 6/6/93";
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static char rcsid[] = "$OpenBSD: hayes.c,v 1.8 2001/10/24 18:38:58 millert Exp $";
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#endif
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#endif /* not lint */
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/*
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* Routines for calling up on a Hayes Modem
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* (based on the old VenTel driver).
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* The modem is expected to be strapped for "echo".
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* Also, the switches enabling the DTR and CD lines
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* must be set correctly.
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* NOTICE:
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* The easy way to hang up a modem is always simply to
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* clear the DTR signal. However, if the +++ sequence
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* (which switches the modem back to local mode) is sent
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* before modem is hung up, removal of the DTR signal
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* has no effect (except that it prevents the modem from
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* recognizing commands).
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* (by Helge Skrivervik, Calma Company, Sunnyvale, CA. 1984)
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*/
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/*
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* TODO:
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* It is probably not a good idea to switch the modem
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* state between 'verbose' and terse (status messages).
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* This should be kicked out and we should use verbose
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* mode only. This would make it consistent with normal
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* interactive use thru the command 'tip dialer'.
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*/
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#include "tip.h"
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#include <termios.h>
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#include <sys/ioctl.h>
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#define min(a,b) ((a < b) ? a : b)
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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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static char gobble();
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#define DUMBUFLEN 40
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static char dumbuf[DUMBUFLEN];
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#define DIALING 1
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#define IDLE 2
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#define CONNECTED 3
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#define FAILED 4
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static int state = IDLE;
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int
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hay_dialer(num, acu)
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char *num;
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char *acu;
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{
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char *cp;
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int connected = 0;
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char dummy;
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struct termios cntrl;
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#ifdef ACULOG
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char line[80];
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#endif
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if (hay_sync() == 0) /* make sure we can talk to the modem */
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return(0);
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if (boolean(value(VERBOSE)))
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printf("\ndialing...");
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fflush(stdout);
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tcgetattr(FD, &cntrl);
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cntrl.c_cflag |= HUPCL;
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tcsetattr(FD, TCSANOW, &cntrl);
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tcflush(FD, TCIOFLUSH);
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write(FD, "ATv0\r", 5); /* tell modem to use short status codes */
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gobble("\r");
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gobble("\r");
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write(FD, "ATTD", 4); /* send dial command */
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for (cp = num; *cp; cp++)
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if (*cp == '=')
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*cp = ',';
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write(FD, num, strlen(num));
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state = DIALING;
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write(FD, "\r", 1);
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connected = 0;
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if (gobble("\r")) {
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if ((dummy = gobble("01234")) != '1')
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error_rep(dummy);
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else
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connected = 1;
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}
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if (connected)
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state = CONNECTED;
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else {
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state = FAILED;
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return (connected); /* lets get out of here.. */
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}
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tcflush(FD, TCIOFLUSH);
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#ifdef ACULOG
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if (timeout) {
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(void)sprintf(line, "%ld second dial timeout",
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number(value(DIALTIMEOUT)));
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logent(value(HOST), num, "hayes", line);
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}
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#endif
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if (timeout)
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hay_disconnect(); /* insurance */
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return (connected);
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}
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void
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hay_disconnect()
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{
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/* first hang up the modem*/
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#ifdef DEBUG
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printf("\rdisconnecting modem....\n\r");
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#endif
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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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goodbye();
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}
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void
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hay_abort()
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{
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write(FD, "\r", 1); /* send anything to abort the call */
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hay_disconnect();
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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\r");
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timeout = 1;
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longjmp(timeoutbuf, 1);
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}
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static char
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gobble(match)
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char *match;
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{
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char c;
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sig_t f;
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int i, status = 0;
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f = signal(SIGALRM, sigALRM);
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timeout = 0;
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#ifdef DEBUG
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printf("\ngobble: waiting for %s\n", match);
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#endif
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do {
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if (setjmp(timeoutbuf)) {
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signal(SIGALRM, f);
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return (0);
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}
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alarm(number(value(DIALTIMEOUT)));
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read(FD, &c, 1);
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alarm(0);
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c &= 0177;
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#ifdef DEBUG
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printf("%c 0x%x ", c, c);
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#endif
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for (i = 0; i < strlen(match); i++)
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if (c == match[i])
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status = c;
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} while (status == 0);
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signal(SIGALRM, SIG_DFL);
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#ifdef DEBUG
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printf("\n");
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#endif
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return (status);
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}
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static void
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error_rep(c)
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char c;
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{
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printf("\n\r");
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switch (c) {
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case '0':
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printf("OK");
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break;
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case '1':
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printf("CONNECT");
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break;
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case '2':
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printf("RING");
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break;
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case '3':
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printf("NO CARRIER");
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break;
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case '4':
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printf("ERROR in input");
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break;
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case '5':
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printf("CONNECT 1200");
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break;
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default:
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printf("Unknown Modem error: %c (0x%x)", c, c);
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}
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printf("\n\r");
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return;
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}
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/*
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* set modem back to normal verbose status codes.
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*/
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void
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goodbye()
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{
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int len;
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char c;
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tcflush(FD, TCIOFLUSH);
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if (hay_sync()) {
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sleep(1);
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#ifndef DEBUG
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tcflush(FD, TCIOFLUSH);
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#endif
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write(FD, "ATH0\r", 5); /* insurance */
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#ifndef DEBUG
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c = gobble("03");
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if (c != '0' && c != '3') {
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printf("cannot hang up modem\n\r");
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printf("please use 'tip dialer' to make sure the line is hung up\n\r");
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}
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#endif
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sleep(1);
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ioctl(FD, FIONREAD, &len);
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#ifdef DEBUG
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printf("goodbye1: len=%d -- ", len);
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rlen = read(FD, dumbuf, min(len, DUMBUFLEN));
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dumbuf[rlen] = '\0';
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printf("read (%d): %s\r\n", rlen, dumbuf);
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#endif
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write(FD, "ATv1\r", 5);
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sleep(1);
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#ifdef DEBUG
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ioctl(FD, FIONREAD, &len);
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printf("goodbye2: len=%d -- ", len);
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rlen = read(FD, dumbuf, min(len, DUMBUFLEN));
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dumbuf[rlen] = '\0';
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printf("read (%d): %s\r\n", rlen, dumbuf);
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#endif
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}
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tcflush(FD, TCIOFLUSH);
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ioctl(FD, TIOCCDTR, 0); /* clear DTR (insurance) */
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close(FD);
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}
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#define MAXRETRY 5
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int
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hay_sync()
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{
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int len, retry = 0;
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while (retry++ <= MAXRETRY) {
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write(FD, "AT\r", 3);
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sleep(1);
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ioctl(FD, FIONREAD, &len);
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if (len) {
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len = read(FD, dumbuf, min(len, DUMBUFLEN));
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if (strchr(dumbuf, '0') ||
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(strchr(dumbuf, 'O') && strchr(dumbuf, 'K')))
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return(1);
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#ifdef DEBUG
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dumbuf[len] = '\0';
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printf("hay_sync: (\"%s\") %d\n\r", dumbuf, retry);
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#endif
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}
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ioctl(FD, TIOCCDTR, 0);
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ioctl(FD, TIOCSDTR, 0);
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}
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printf("Cannot synchronize with hayes...\n\r");
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return(0);
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}
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