1 /* $OpenBSD: ctl.c,v 1.9 2004/03/02 21:04:42 tedu 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 #ifndef lint
34 #if 0
35 static char sccsid[] = "@(#)ctl.c 8.1 (Berkeley) 6/6/93";
36 #endif
37 static const char rcsid[] = "$OpenBSD: ctl.c,v 1.9 2004/03/02 21:04:42 tedu Exp $";
38 #endif /* not lint */
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 "talk.h"
47 #include <arpa/inet.h>
48 #include "talk_ctl.h"
49
50 struct sockaddr_in daemon_addr = { sizeof(daemon_addr), AF_INET };
51 struct sockaddr_in ctl_addr = { sizeof(ctl_addr), AF_INET };
52 struct sockaddr_in my_addr = { sizeof(my_addr), AF_INET };
53
54 /* inet addresses of the two machines */
55 struct in_addr my_machine_addr;
56 struct in_addr his_machine_addr;
57
58 u_short daemon_port; /* port number of the talk daemon */
59
60 int ctl_sockt;
61 int sockt;
62 int invitation_waiting = 0;
63
64 CTL_MSG msg;
65
66 void
open_sockt(void)67 open_sockt(void)
68 {
69 socklen_t length;
70
71 my_addr.sin_addr = my_machine_addr;
72 my_addr.sin_port = 0;
73 sockt = socket(AF_INET, SOCK_STREAM, 0);
74 if (sockt == -1)
75 quit("Bad socket", 1);
76 if (bind(sockt, (struct sockaddr *)&my_addr, sizeof(my_addr)) != 0)
77 quit("Binding local socket", 1);
78 length = sizeof(my_addr);
79 if (getsockname(sockt, (struct sockaddr *)&my_addr, &length) == -1)
80 quit("Bad address for socket", 1);
81 }
82
83 /* open the ctl socket */
84 void
open_ctl(void)85 open_ctl(void)
86 {
87 socklen_t length;
88
89 ctl_addr.sin_port = 0;
90 ctl_addr.sin_addr = my_machine_addr;
91 ctl_sockt = socket(AF_INET, SOCK_DGRAM, 0);
92 if (ctl_sockt == -1)
93 quit("Bad socket", 1);
94 if (bind(ctl_sockt,
95 (struct sockaddr *)&ctl_addr, sizeof(ctl_addr)) != 0)
96 quit("Couldn't bind to control socket", 1);
97 length = sizeof(ctl_addr);
98 if (getsockname(ctl_sockt,
99 (struct sockaddr *)&ctl_addr, &length) == -1)
100 quit("Bad address for ctl socket", 1);
101 }
102
103 /* print_addr is a debug print routine */
104 void
print_addr(struct sockaddr_in addr)105 print_addr(struct sockaddr_in addr)
106 {
107 int i;
108
109 printf("addr = %s, port = %o, family = %o zero = ",
110 inet_ntoa(addr.sin_addr), addr.sin_port, addr.sin_family);
111 for (i = 0; i < 8; i++)
112 printf("%o ", (int)addr.sin_zero[i]);
113 putchar('\n');
114 }
115