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
33
34 /*
35 * This file handles haggling with the various talk daemons to
36 * get a socket to talk to. sockt is opened and connected in
37 * the progress
38 */
39
40 #include <sys/types.h>
41 #include <sys/socket.h>
42
43 #include <string.h>
44
45 #include "talk.h"
46 #include "talk_ctl.h"
47
48 struct sockaddr_in daemon_addr = { .sin_len = sizeof(daemon_addr), .sin_family = AF_INET };
49 struct sockaddr_in ctl_addr = { .sin_len = sizeof(ctl_addr), .sin_family = AF_INET };
50 struct sockaddr_in my_addr = { .sin_len = sizeof(my_addr), .sin_family = AF_INET };
51
52 /* inet addresses of the two machines */
53 struct in_addr my_machine_addr;
54 struct in_addr his_machine_addr;
55
56 u_short daemon_port; /* port number of the talk daemon */
57
58 int ctl_sockt;
59 int sockt;
60 int invitation_waiting = 0;
61
62 CTL_MSG msg;
63
64 void
open_sockt(void)65 open_sockt(void)
66 {
67 socklen_t length;
68
69 (void)memset(&my_addr, 0, sizeof(my_addr));
70 my_addr.sin_family = AF_INET;
71 my_addr.sin_len = sizeof(my_addr);
72 my_addr.sin_addr = my_machine_addr;
73 my_addr.sin_port = 0;
74 sockt = socket(AF_INET, SOCK_STREAM, 0);
75 if (sockt == -1)
76 p_error("Bad socket");
77 if (bind(sockt, (struct sockaddr *)&my_addr, sizeof(my_addr)) != 0)
78 p_error("Binding local socket");
79 length = sizeof(my_addr);
80 if (getsockname(sockt, (struct sockaddr *)&my_addr, &length) == -1)
81 p_error("Bad address for socket");
82 }
83
84 /* open the ctl socket */
85 void
open_ctl(void)86 open_ctl(void)
87 {
88 socklen_t length;
89
90 (void)memset(&ctl_addr, 0, sizeof(ctl_addr));
91 ctl_addr.sin_family = AF_INET;
92 ctl_addr.sin_len = sizeof(my_addr);
93 ctl_addr.sin_port = 0;
94 ctl_addr.sin_addr = my_machine_addr;
95 ctl_sockt = socket(AF_INET, SOCK_DGRAM, 0);
96 if (ctl_sockt == -1)
97 p_error("Bad socket");
98 if (bind(ctl_sockt,
99 (struct sockaddr *)&ctl_addr, sizeof(ctl_addr)) != 0)
100 p_error("Couldn't bind to control socket");
101 length = sizeof(ctl_addr);
102 if (getsockname(ctl_sockt,
103 (struct sockaddr *)&ctl_addr, &length) == -1)
104 p_error("Bad address for ctl socket");
105 }
106
107 /* print_addr is a debug print routine */
108 void
print_addr(struct sockaddr_in addr)109 print_addr(struct sockaddr_in addr)
110 {
111 int i;
112
113 printf("addr = %lx, port = %o, family = %o zero = ",
114 (u_long)addr.sin_addr.s_addr, addr.sin_port, addr.sin_family);
115 for (i = 0; i<8;i++)
116 printf("%o ", (int)addr.sin_zero[i]);
117 putchar('\n');
118 }
119