xref: /dragonfly/usr.bin/talk/ctl.c (revision dc71b7ab)
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