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 * 3. 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 * @(#)ctl.c 8.1 (Berkeley) 6/6/93
30 * $FreeBSD: src/usr.bin/talk/ctl.c,v 1.6 1999/08/28 01:06:10 peter Exp $
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/types.h>
40 #include <sys/socket.h>
41 #include "talk.h"
42
43 struct sockaddr_in daemon_addr = { .sin_len = sizeof(daemon_addr), .sin_family = AF_INET };
44 struct sockaddr_in ctl_addr = { .sin_len = sizeof(ctl_addr), .sin_family = AF_INET };
45 struct sockaddr_in my_addr = { .sin_len = sizeof(my_addr), .sin_family = AF_INET };
46
47 /* inet addresses of the two machines */
48 struct in_addr my_machine_addr;
49 struct in_addr his_machine_addr;
50
51 u_short daemon_port; /* port number of the talk daemon */
52
53 int ctl_sockt;
54 int sockt;
55 int invitation_waiting = 0;
56
57 CTL_MSG msg;
58
59 void
open_sockt(void)60 open_sockt(void)
61 {
62 int length;
63
64 my_addr.sin_addr = my_machine_addr;
65 my_addr.sin_port = 0;
66 sockt = socket(AF_INET, SOCK_STREAM, 0);
67 if (sockt <= 0)
68 p_error("Bad socket");
69 if (bind(sockt, (struct sockaddr *)&my_addr, sizeof(my_addr)) != 0)
70 p_error("Binding local socket");
71 length = sizeof(my_addr);
72 if (getsockname(sockt, (struct sockaddr *)&my_addr, &length) == -1)
73 p_error("Bad address for socket");
74 }
75
76 /* open the ctl socket */
77 void
open_ctl(void)78 open_ctl(void)
79 {
80 int length;
81
82 ctl_addr.sin_port = 0;
83 ctl_addr.sin_addr = my_machine_addr;
84 ctl_sockt = socket(AF_INET, SOCK_DGRAM, 0);
85 if (ctl_sockt <= 0)
86 p_error("Bad socket");
87 if (bind(ctl_sockt,
88 (struct sockaddr *)&ctl_addr, sizeof(ctl_addr)) != 0)
89 p_error("Couldn't bind to control socket");
90 length = sizeof(ctl_addr);
91 if (getsockname(ctl_sockt,
92 (struct sockaddr *)&ctl_addr, &length) == -1)
93 p_error("Bad address for ctl socket");
94 }
95
96 /* print_addr is a debug print routine */
97 void
print_addr(struct sockaddr_in addr)98 print_addr(struct sockaddr_in addr)
99 {
100 int i;
101
102 printf("addr = %lx, port = %o, family = %o zero = ",
103 (u_long)addr.sin_addr.s_addr, addr.sin_port, addr.sin_family);
104 for (i = 0; i < 8; i++)
105 printf("%o ", (int)addr.sin_zero[i]);
106 putchar('\n');
107 }
108