d8ac409160
plain 0 should be used. This happens to work because we #define NULL to 0, but is stylistically wrong and can cause problems for people trying to port bits of code to other environments. PR: 2752 Submitted by: Arne Henrik Juul <arnej@imf.unit.no>
403 lines
9.2 KiB
C
403 lines
9.2 KiB
C
/*
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* Copyright (c) 1986, 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[] = "@(#)multitech.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 Courier modem.
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* Derived from Hayes driver.
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*/
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#include "tipconf.h"
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#include "tip.h"
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#include "acucommon.h"
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#include <stdio.h>
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/* #define DEBUG */
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#define MAXRETRY 5
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/*
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Configuration
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*/
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static CONST char *dial_command = "ATDT";
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static CONST char *hangup_command = "ATH\r";
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static CONST char *echo_off_command = "ATE0\r";
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static CONST char *reset_command = "\rATZ\r";
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static CONST char *init_string = "AT$BA0$SB38400&E1&E4&E13&E15Q0V1X4E0S0=0\r";
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static CONST char *escape_sequence = "+++"; /* return to command escape sequence */
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static CONST int lock_baud = 1;
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static CONST unsigned int intercharacter_delay = 20;
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static CONST unsigned int intercommand_delay = 250;
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static CONST unsigned int escape_guard_time = 250;
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static CONST unsigned int reset_delay = 2000;
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/*
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Forward declarations
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*/
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void multitech_write (int fd, CONST char *cp, int n);
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void multitech_write_str (int fd, CONST char *cp);
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void multitech_disconnect ();
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void acu_nap (unsigned int how_long);
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static void sigALRM ();
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static int multitechsync ();
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static int multitech_swallow (register char *match);
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/*
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Global vars
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*/
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static int timeout = 0;
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static int connected = 0;
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static jmp_buf timeoutbuf, intbuf;
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int multitech_dialer (register char *num, char *acu)
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{
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register char *cp;
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#if ACULOG
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char line [80];
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#endif
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static int multitech_connect(), multitech_swallow();
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if (lock_baud)
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{
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int i;
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if ((i = speed(number(value(BAUDRATE)))) == 0)
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return 0;
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ttysetup (i);
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}
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if (boolean(value(VERBOSE)))
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printf("Using \"%s\"\n", acu);
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acu_hupcl ();
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/*
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* Get in synch.
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*/
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if (!multitechsync()) {
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badsynch:
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printf("can't synchronize with multitech\n");
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#if ACULOG
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logent(value(HOST), num, "multitech", "can't synch up");
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#endif
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return (0);
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}
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acu_nap (intercommand_delay);
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multitech_write_str (FD, echo_off_command); /* turn off echoing */
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sleep(1);
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#ifdef DEBUG
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if (boolean(value(VERBOSE)))
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multitech_verbose_read();
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#endif
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acu_flush ();
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acu_nap (intercommand_delay);
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multitech_write_str (FD, init_string);
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if (!multitech_swallow ("\r\nOK\r\n"))
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goto badsynch;
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fflush (stdout);
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acu_nap (intercommand_delay);
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multitech_write_str (FD, 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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multitech_write_str (FD, num);
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multitech_write_str (FD, "\r");
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connected = multitech_connect();
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#if 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, "multitech", line);
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}
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#endif
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if (timeout)
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multitech_disconnect ();
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return (connected);
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}
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void multitech_disconnect ()
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{
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int okay, retries;
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for (retries = okay = 0; retries < 3 && !okay; retries++)
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{
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/* first hang up the modem*/
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ioctl (FD, TIOCCDTR, 0);
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acu_nap (escape_guard_time);
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ioctl (FD, TIOCSDTR, 0);
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acu_nap (escape_guard_time);
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/*
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* If not strapped for DTR control, try to get command mode.
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*/
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acu_nap (escape_guard_time);
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multitech_write_str (FD, escape_sequence);
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acu_nap (escape_guard_time);
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multitech_write_str (FD, hangup_command);
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okay = multitech_swallow ("\r\nOK\r\n");
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}
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if (!okay)
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{
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#if ACULOG
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logent(value(HOST), "", "multitech", "can't hang up modem");
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#endif
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if (boolean(value(VERBOSE)))
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printf("hang up failed\n");
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}
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close (FD);
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}
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void multitech_abort ()
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{
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multitech_write_str (FD, "\r"); /* send anything to abort the call */
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multitech_disconnect ();
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}
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static void sigALRM ()
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{
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(void) 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 multitech_swallow (register char *match)
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{
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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 (*match =='\0') {
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signal(SIGALRM, f);
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return (1);
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}
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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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if (boolean(value(VERBOSE)))
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putchar(c);
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#endif
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} while (c == *match++);
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#ifdef DEBUG
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if (boolean(value(VERBOSE)))
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fflush (stdout);
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#endif
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signal(SIGALRM, SIG_DFL);
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return (0);
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}
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static struct baud_msg {
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char *msg;
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int baud;
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} baud_msg[] = {
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"", B300,
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" 1200", B1200,
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" 2400", B2400,
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" 9600", B9600,
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" 9600/ARQ", B9600,
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0, 0,
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};
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static int multitech_connect ()
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{
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char c;
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int nc, nl, n;
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char dialer_buf[64];
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struct baud_msg *bm;
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sig_t f;
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if (multitech_swallow("\r\n") == 0)
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return (0);
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f = signal(SIGALRM, sigALRM);
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again:
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nc = 0; nl = sizeof(dialer_buf)-1;
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bzero(dialer_buf, sizeof(dialer_buf));
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timeout = 0;
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for (nc = 0, nl = sizeof(dialer_buf)-1 ; nl > 0 ; nc++, nl--) {
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if (setjmp(timeoutbuf))
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break;
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alarm(number(value(DIALTIMEOUT)));
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n = read(FD, &c, 1);
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alarm(0);
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if (n <= 0)
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break;
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c &= 0x7f;
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if (c == '\r') {
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if (multitech_swallow("\n") == 0)
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break;
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if (!dialer_buf[0])
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goto again;
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if (strcmp(dialer_buf, "RINGING") == 0 &&
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boolean(value(VERBOSE))) {
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#ifdef DEBUG
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printf("%s\r\n", dialer_buf);
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#endif
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goto again;
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}
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if (strncmp(dialer_buf, "CONNECT",
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sizeof("CONNECT")-1) != 0)
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break;
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if (lock_baud) {
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signal(SIGALRM, f);
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#ifdef DEBUG
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if (boolean(value(VERBOSE)))
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printf("%s\r\n", dialer_buf);
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#endif
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return (1);
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}
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for (bm = baud_msg ; bm->msg ; bm++)
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if (strcmp(bm->msg, dialer_buf+sizeof("CONNECT")-1) == 0) {
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if (!acu_setspeed (bm->baud))
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goto error;
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signal(SIGALRM, f);
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#ifdef DEBUG
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if (boolean(value(VERBOSE)))
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printf("%s\r\n", dialer_buf);
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#endif
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return (1);
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}
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break;
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}
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dialer_buf[nc] = c;
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}
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error1:
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printf("%s\r\n", dialer_buf);
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error:
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signal(SIGALRM, f);
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return (0);
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}
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/*
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* This convoluted piece of code attempts to get
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* the multitech in sync.
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*/
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static int multitechsync ()
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{
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int already = 0;
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int len;
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char buf[40];
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while (already++ < MAXRETRY) {
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acu_nap (intercommand_delay);
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ioctl (FD, TIOCFLUSH, 0); /* flush any clutter */
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multitech_write_str (FD, reset_command); /* reset modem */
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bzero(buf, sizeof(buf));
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acu_nap (reset_delay);
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ioctl (FD, FIONREAD, &len);
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if (len) {
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len = read(FD, buf, sizeof(buf));
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#ifdef DEBUG
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buf [len] = '\0';
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printf("multitechsync: (\"%s\")\n\r", buf);
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#endif
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if (index(buf, '0') ||
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(index(buf, 'O') && index(buf, 'K')))
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return(1);
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}
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/*
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* If not strapped for DTR control,
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* try to get command mode.
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*/
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acu_nap (escape_guard_time);
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multitech_write_str (FD, escape_sequence);
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acu_nap (escape_guard_time);
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multitech_write_str (FD, hangup_command);
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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.
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*/
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acu_nap (escape_guard_time);
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ioctl (FD, TIOCCDTR, 0);
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acu_nap (escape_guard_time);
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ioctl (FD, TIOCSDTR, 0);
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}
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acu_nap (intercommand_delay);
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multitech_write_str (FD, reset_command);
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return (0);
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}
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void multitech_write_str (int fd, const char *cp)
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{
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#ifdef DEBUG
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printf ("multitech: sending %s\n", cp);
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#endif
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multitech_write (fd, cp, strlen (cp));
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}
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void multitech_write (int fd, const char *cp, int n)
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{
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acu_flush ();
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acu_nap (intercharacter_delay);
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for ( ; n-- ; cp++) {
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write (fd, cp, 1);
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acu_flush ();
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acu_nap (intercharacter_delay);
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}
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}
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#ifdef DEBUG
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multitech_verbose_read()
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{
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int n = 0;
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char buf[BUFSIZ];
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if (ioctl(FD, FIONREAD, &n) < 0)
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return;
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if (n <= 0)
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return;
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if (read(FD, buf, n) != n)
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return;
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write(1, buf, n);
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}
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#endif
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/* end of multitech.c */
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