1/*	$OpenBSD: get_addrs.c,v 1.10 2016/02/01 07:29:25 mestre Exp $	*/
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. 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#include <err.h>
34#include <netdb.h>
35#include <string.h>
36#include <unistd.h>
37
38#include "talk.h"
39#include "talk_ctl.h"
40
41void
42get_addrs(char *my_machine_name, char *his_machine_name)
43{
44	struct hostent *hp;
45	struct servent *sp;
46
47	msg.pid = htonl(getpid());
48	/* look up the address of the local host */
49	hp = gethostbyname(my_machine_name);
50	if (hp == NULL)
51		errx(1, "%s: %s", my_machine_name, hstrerror(h_errno));
52	bcopy(hp->h_addr, &my_machine_addr, hp->h_length);
53	/*
54	 * If the callee is on-machine, just copy the
55	 * network address, otherwise do a lookup...
56	 */
57	if (strcmp(his_machine_name, my_machine_name)) {
58		hp = gethostbyname(his_machine_name);
59		if (hp == NULL)
60			errx(1, "%s: %s", his_machine_name, hstrerror(h_errno));
61		bcopy(hp->h_addr, &his_machine_addr, hp->h_length);
62	} else
63		his_machine_addr = my_machine_addr;
64	/* find the server's port */
65	sp = getservbyname("ntalk", "udp");
66	if (sp == NULL)
67		errx(1, "ntalk/udp: service is not registered.");
68	daemon_port = sp->s_port;
69}
70