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}
123