Annotation of src/usr.bin/talk/get_addrs.c, Revision 1.2
1.2 ! deraadt 1: /* $OpenBSD: get_addrs.c,v 1.3 1994/12/09 02:14:14 jtc Exp $ */
1.1 deraadt 2: /* $NetBSD: get_addrs.c,v 1.3 1994/12/09 02:14:14 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. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by the University of
19: * California, Berkeley and its contributors.
20: * 4. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: */
36:
37: #ifndef lint
38: #if 0
39: static char sccsid[] = "@(#)get_addrs.c 8.1 (Berkeley) 6/6/93";
40: #endif
1.2 ! deraadt 41: static char rcsid[] = "$OpenBSD: get_addrs.c,v 1.3 1994/12/09 02:14:14 jtc Exp $";
1.1 deraadt 42: #endif /* not lint */
43:
44: #include <sys/types.h>
45: #include <sys/socket.h>
46: #include <netinet/in.h>
47: #include <protocols/talkd.h>
48: #include <netdb.h>
49: #include <stdio.h>
50: #include "talk_ctl.h"
51:
52: get_addrs(my_machine_name, his_machine_name)
53: char *my_machine_name, *his_machine_name;
54: {
55: struct hostent *hp;
56: struct servent *sp;
57:
58: msg.pid = htonl(getpid());
59: /* look up the address of the local host */
60: hp = gethostbyname(my_machine_name);
61: if (hp == NULL) {
62: fprintf(stderr, "talk: %s: ", my_machine_name);
63: herror((char *)NULL);
64: exit(-1);
65: }
66: bcopy(hp->h_addr, (char *)&my_machine_addr, hp->h_length);
67: /*
68: * If the callee is on-machine, just copy the
69: * network address, otherwise do a lookup...
70: */
71: if (strcmp(his_machine_name, my_machine_name)) {
72: hp = gethostbyname(his_machine_name);
73: if (hp == NULL) {
74: fprintf(stderr, "talk: %s: ", his_machine_name);
75: herror((char *)NULL);
76: exit(-1);
77: }
78: bcopy(hp->h_addr, (char *) &his_machine_addr, hp->h_length);
79: } else
80: his_machine_addr = my_machine_addr;
81: /* find the server's port */
82: sp = getservbyname("ntalk", "udp");
83: if (sp == 0) {
84: fprintf(stderr, "talk: %s/%s: service is not registered.\n",
85: "ntalk", "udp");
86: exit(-1);
87: }
88: daemon_port = sp->s_port;
89: }