1 /* $OpenBSD: ctl.c,v 1.13 2016/02/01 07:29:25 mestre Exp $ */
2 /* $NetBSD: ctl.c,v 1.3 1994/12/09 02:14:10 jtc Exp $ */
3
4 /*
5 * Copyright (c) 1983, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 /*
34 * This file handles haggling with the various talk daemons to
35 * get a socket to talk to. sockt is opened and connected in
36 * the progress
37 */
38
39 #include <sys/socket.h>
40 #include <arpa/inet.h>
41
42 #include "talk.h"
43
44 struct sockaddr_in daemon_addr = { sizeof(daemon_addr), AF_INET };
45 struct sockaddr_in ctl_addr = { sizeof(ctl_addr), AF_INET };
46 struct sockaddr_in my_addr = { sizeof(my_addr), AF_INET };
47
48 /* inet addresses of the two machines */
49 struct in_addr my_machine_addr;
50 struct in_addr his_machine_addr;
51
52 u_short daemon_port; /* port number of the talk daemon */
53
54 int ctl_sockt;
55 int sockt;
56 int invitation_waiting;
57
58 CTL_MSG msg;
59
60 void
open_sockt(void)61 open_sockt(void)
62 {
63 socklen_t length;
64
65 my_addr.sin_addr = my_machine_addr;
66 my_addr.sin_port = 0;
67 sockt = socket(AF_INET, SOCK_STREAM, 0);
68 if (sockt == -1)
69 quit("Bad socket", 1);
70 if (bind(sockt, (struct sockaddr *)&my_addr, sizeof(my_addr)) != 0)
71 quit("Binding local socket", 1);
72 length = sizeof(my_addr);
73 if (getsockname(sockt, (struct sockaddr *)&my_addr, &length) == -1)
74 quit("Bad address for socket", 1);
75 }
76
77 /* open the ctl socket */
78 void
open_ctl(void)79 open_ctl(void)
80 {
81 socklen_t length;
82
83 ctl_addr.sin_port = 0;
84 ctl_addr.sin_addr = my_machine_addr;
85 ctl_sockt = socket(AF_INET, SOCK_DGRAM, 0);
86 if (ctl_sockt == -1)
87 quit("Bad socket", 1);
88 if (bind(ctl_sockt,
89 (struct sockaddr *)&ctl_addr, sizeof(ctl_addr)) != 0)
90 quit("Couldn't bind to control socket", 1);
91 length = sizeof(ctl_addr);
92 if (getsockname(ctl_sockt,
93 (struct sockaddr *)&ctl_addr, &length) == -1)
94 quit("Bad address for ctl socket", 1);
95 }
96