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/usr.bin/talk/ctl.c

https://bitbucket.org/freebsd/freebsd-head/
C | 122 lines | 68 code | 18 blank | 36 comment | 13 complexity | 30ecd0ba8b49efae3323ab6b6aa343fb MD5 | raw file
  1/*
  2 * Copyright (c) 1983, 1993
  3 *	The Regents of the University of California.  All rights reserved.
  4 *
  5 * Redistribution and use in source and binary forms, with or without
  6 * modification, are permitted provided that the following conditions
  7 * are met:
  8 * 1. Redistributions of source code must retain the above copyright
  9 *    notice, this list of conditions and the following disclaimer.
 10 * 2. Redistributions in binary form must reproduce the above copyright
 11 *    notice, this list of conditions and the following disclaimer in the
 12 *    documentation and/or other materials provided with the distribution.
 13 * 4. Neither the name of the University nor the names of its contributors
 14 *    may be used to endorse or promote products derived from this software
 15 *    without specific prior written permission.
 16 *
 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 27 * SUCH DAMAGE.
 28 */
 29
 30#include <sys/cdefs.h>
 31
 32__FBSDID("$FreeBSD$");
 33
 34#ifndef lint
 35static const char sccsid[] = "@(#)ctl.c	8.1 (Berkeley) 6/6/93";
 36#endif
 37
 38/*
 39 * This file handles haggling with the various talk daemons to
 40 * get a socket to talk to. sockt is opened and connected in
 41 * the progress
 42 */
 43
 44#include <sys/types.h>
 45#include <sys/socket.h>
 46
 47#include <string.h>
 48
 49#include "talk.h"
 50#include "talk_ctl.h"
 51
 52struct	sockaddr_in daemon_addr = { .sin_len = sizeof(daemon_addr), .sin_family = AF_INET };
 53struct	sockaddr_in ctl_addr = { .sin_len = sizeof(ctl_addr), .sin_family = AF_INET };
 54struct	sockaddr_in my_addr = { .sin_len = sizeof(my_addr), .sin_family = AF_INET };
 55
 56	/* inet addresses of the two machines */
 57struct	in_addr my_machine_addr;
 58struct	in_addr his_machine_addr;
 59
 60u_short daemon_port;	/* port number of the talk daemon */
 61
 62int	ctl_sockt;
 63int	sockt;
 64int	invitation_waiting = 0;
 65
 66CTL_MSG msg;
 67
 68void
 69open_sockt(void)
 70{
 71	socklen_t length;
 72
 73	(void)memset(&my_addr, 0, sizeof(my_addr));
 74	my_addr.sin_family = AF_INET;
 75	my_addr.sin_len = sizeof(my_addr);
 76	my_addr.sin_addr = my_machine_addr;
 77	my_addr.sin_port = 0;
 78	sockt = socket(AF_INET, SOCK_STREAM, 0);
 79	if (sockt == -1)
 80		p_error("Bad socket");
 81	if (bind(sockt, (struct sockaddr *)&my_addr, sizeof(my_addr)) != 0)
 82		p_error("Binding local socket");
 83	length = sizeof(my_addr);
 84	if (getsockname(sockt, (struct sockaddr *)&my_addr, &length) == -1)
 85		p_error("Bad address for socket");
 86}
 87
 88/* open the ctl socket */
 89void
 90open_ctl(void)
 91{
 92	socklen_t length;
 93
 94	(void)memset(&ctl_addr, 0, sizeof(ctl_addr));
 95	ctl_addr.sin_family = AF_INET;
 96	ctl_addr.sin_len = sizeof(my_addr);
 97	ctl_addr.sin_port = 0;
 98	ctl_addr.sin_addr = my_machine_addr;
 99	ctl_sockt = socket(AF_INET, SOCK_DGRAM, 0);
100	if (ctl_sockt == -1)
101		p_error("Bad socket");
102	if (bind(ctl_sockt,
103	    (struct sockaddr *)&ctl_addr, sizeof(ctl_addr)) != 0)
104		p_error("Couldn't bind to control socket");
105	length = sizeof(ctl_addr);
106	if (getsockname(ctl_sockt,
107	    (struct sockaddr *)&ctl_addr, &length) == -1)
108		p_error("Bad address for ctl socket");
109}
110
111/* print_addr is a debug print routine */
112void
113print_addr(struct sockaddr_in addr)
114{
115	int i;
116
117	printf("addr = %lx, port = %o, family = %o zero = ",
118		(u_long)addr.sin_addr.s_addr, addr.sin_port, addr.sin_family);
119	for (i = 0; i<8;i++)
120	printf("%o ", (int)addr.sin_zero[i]);
121	putchar('\n');
122}