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https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
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381 lines
8.4 KiB
C
381 lines
8.4 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[] = "@(#)courier.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 "tip.h"
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#include <stdio.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 int connected = 0;
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static jmp_buf timeoutbuf, intbuf;
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static int coursync();
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cour_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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#ifdef ACULOG
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char line[80];
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#endif
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static int cour_connect(), cour_swallow();
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if (boolean(value(VERBOSE)))
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printf("Using \"%s\"\n", acu);
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ioctl(FD, TIOCHPCL, 0);
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/*
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* Get in synch.
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*/
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if (!coursync()) {
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badsynch:
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printf("can't synchronize with courier\n");
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#ifdef ACULOG
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logent(value(HOST), num, "courier", "can't synch up");
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#endif
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return (0);
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}
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cour_write(FD, "AT E0\r", 6); /* 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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cour_verbose_read();
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#endif
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ioctl(FD, TIOCFLUSH, 0); /* flush any clutter */
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cour_write(FD, "AT C1 E0 H0 Q0 X6 V1\r", 21);
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if (!cour_swallow("\r\nOK\r\n"))
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goto badsynch;
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fflush(stdout);
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cour_write(FD, "AT D", 4);
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for (cp = num; *cp; cp++)
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if (*cp == '=')
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*cp = ',';
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cour_write(FD, num, strlen(num));
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cour_write(FD, "\r", 1);
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connected = cour_connect();
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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, "cour", line);
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}
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#endif
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if (timeout)
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cour_disconnect();
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return (connected);
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}
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cour_disconnect()
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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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sleep(1);
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ioctl(FD, TIOCSDTR, 0);
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coursync(); /* reset */
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close(FD);
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}
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cour_abort()
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{
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cour_write(FD, "\r", 1); /* send anything to abort the call */
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cour_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");
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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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cour_swallow(match)
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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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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
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cour_connect()
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{
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char c;
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int nc, nl, n;
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struct sgttyb sb;
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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 (cour_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 (cour_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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for (bm = baud_msg ; bm->msg ; bm++)
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if (strcmp(bm->msg,
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dialer_buf+sizeof("CONNECT")-1) == 0) {
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if (ioctl(FD, TIOCGETP, &sb) < 0) {
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perror("TIOCGETP");
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goto error;
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}
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sb.sg_ispeed = sb.sg_ospeed = bm->baud;
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if (ioctl(FD, TIOCSETP, &sb) < 0) {
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perror("TIOCSETP");
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goto error;
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}
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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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#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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}
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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 courier in sync.
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*/
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static int
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coursync()
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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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ioctl(FD, TIOCFLUSH, 0); /* flush any clutter */
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cour_write(FD, "\rAT Z\r", 6); /* reset modem */
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bzero(buf, sizeof(buf));
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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, buf, sizeof(buf));
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#ifdef DEBUG
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buf[len] = '\0';
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printf("coursync: (\"%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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sleep(1);
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cour_write(FD, "+++", 3);
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sleep(1);
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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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ioctl(FD, TIOCCDTR, 0);
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sleep(1);
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ioctl(FD, TIOCSDTR, 0);
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}
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cour_write(FD, "\rAT Z\r", 6);
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return (0);
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}
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cour_write(fd, cp, n)
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int fd;
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char *cp;
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int n;
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{
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struct sgttyb sb;
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#ifdef notdef
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if (boolean(value(VERBOSE)))
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write(1, cp, n);
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#endif
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ioctl(fd, TIOCGETP, &sb);
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ioctl(fd, TIOCSETP, &sb);
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cour_nap();
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for ( ; n-- ; cp++) {
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write(fd, cp, 1);
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ioctl(fd, TIOCGETP, &sb);
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ioctl(fd, TIOCSETP, &sb);
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cour_nap();
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}
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}
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#ifdef DEBUG
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cour_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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/*
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* Code stolen from /usr/src/lib/libc/gen/sleep.c
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*/
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#define mask(s) (1<<((s)-1))
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#define setvec(vec, a) \
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vec.sv_handler = a; vec.sv_mask = vec.sv_onstack = 0
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static napms = 50; /* Give the courier 50 milliseconds between characters */
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static int ringring;
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cour_nap()
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{
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static void cour_napx();
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int omask;
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struct itimerval itv, oitv;
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register struct itimerval *itp = &itv;
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struct sigvec vec, ovec;
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timerclear(&itp->it_interval);
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timerclear(&itp->it_value);
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if (setitimer(ITIMER_REAL, itp, &oitv) < 0)
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return;
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setvec(ovec, SIG_DFL);
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omask = sigblock(mask(SIGALRM));
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itp->it_value.tv_sec = napms/1000;
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itp->it_value.tv_usec = ((napms%1000)*1000);
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setvec(vec, cour_napx);
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ringring = 0;
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(void) sigvec(SIGALRM, &vec, &ovec);
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(void) setitimer(ITIMER_REAL, itp, (struct itimerval *)0);
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while (!ringring)
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sigpause(omask &~ mask(SIGALRM));
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(void) sigvec(SIGALRM, &ovec, (struct sigvec *)0);
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(void) setitimer(ITIMER_REAL, &oitv, (struct itimerval *)0);
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(void) sigsetmask(omask);
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}
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static void
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cour_napx()
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{
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ringring = 1;
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}
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