1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1983, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33
34__FBSDID("$FreeBSD$");
35
36#ifndef lint
37static const char sccsid[] = "@(#)ctl.c	8.1 (Berkeley) 6/6/93";
38#endif
39
40/*
41 * This file handles haggling with the various talk daemons to
42 * get a socket to talk to. sockt is opened and connected in
43 * the progress
44 */
45
46#include <sys/types.h>
47#include <sys/socket.h>
48
49#include <string.h>
50
51#include "talk.h"
52#include "talk_ctl.h"
53
54struct	sockaddr_in daemon_addr = { .sin_len = sizeof(daemon_addr), .sin_family = AF_INET };
55struct	sockaddr_in ctl_addr = { .sin_len = sizeof(ctl_addr), .sin_family = AF_INET };
56struct	sockaddr_in my_addr = { .sin_len = sizeof(my_addr), .sin_family = AF_INET };
57
58	/* inet addresses of the two machines */
59struct	in_addr my_machine_addr;
60struct	in_addr his_machine_addr;
61
62u_short daemon_port;	/* port number of the talk daemon */
63
64int	ctl_sockt;
65int	sockt;
66int	invitation_waiting = 0;
67
68CTL_MSG msg;
69
70void
71open_sockt(void)
72{
73	socklen_t length;
74
75	(void)memset(&my_addr, 0, sizeof(my_addr));
76	my_addr.sin_family = AF_INET;
77	my_addr.sin_len = sizeof(my_addr);
78	my_addr.sin_addr = my_machine_addr;
79	my_addr.sin_port = 0;
80	sockt = socket(AF_INET, SOCK_STREAM, 0);
81	if (sockt == -1)
82		p_error("Bad socket");
83	if (bind(sockt, (struct sockaddr *)&my_addr, sizeof(my_addr)) != 0)
84		p_error("Binding local socket");
85	length = sizeof(my_addr);
86	if (getsockname(sockt, (struct sockaddr *)&my_addr, &length) == -1)
87		p_error("Bad address for socket");
88}
89
90/* open the ctl socket */
91void
92open_ctl(void)
93{
94	socklen_t length;
95
96	(void)memset(&ctl_addr, 0, sizeof(ctl_addr));
97	ctl_addr.sin_family = AF_INET;
98	ctl_addr.sin_len = sizeof(my_addr);
99	ctl_addr.sin_port = 0;
100	ctl_addr.sin_addr = my_machine_addr;
101	ctl_sockt = socket(AF_INET, SOCK_DGRAM, 0);
102	if (ctl_sockt == -1)
103		p_error("Bad socket");
104	if (bind(ctl_sockt,
105	    (struct sockaddr *)&ctl_addr, sizeof(ctl_addr)) != 0)
106		p_error("Couldn't bind to control socket");
107	length = sizeof(ctl_addr);
108	if (getsockname(ctl_sockt,
109	    (struct sockaddr *)&ctl_addr, &length) == -1)
110		p_error("Bad address for ctl socket");
111}
112
113/* print_addr is a debug print routine */
114void
115print_addr(struct sockaddr_in addr)
116{
117	int i;
118
119	printf("addr = %lx, port = %o, family = %o zero = ",
120		(u_long)addr.sin_addr.s_addr, addr.sin_port, addr.sin_family);
121	for (i = 0; i<8;i++)
122	printf("%o ", (int)addr.sin_zero[i]);
123	putchar('\n');
124}
125