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/* $NetBSD: get_addrs.c,v 1.12 2015/06/16 22:54:11 christos Exp $ */
/*
* Copyright (c) 1983, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)get_addrs.c 8.1 (Berkeley) 6/6/93";
#endif
__RCSID("$NetBSD: get_addrs.c,v 1.12 2015/06/16 22:54:11 christos Exp $");
#endif /* not lint */
#include "talk.h"
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <err.h>
#include "talk_ctl.h"
void
get_addrs(const char *my_machine_name, const char *his_machine_name)
{
struct hostent *hp;
struct servent *sp;
msg.pid = htonl(getpid());
/*
* If the callee is on-machine, just use loopback
* otherwise do a lookup...
*/
if (strcmp(his_machine_name, my_machine_name) != 0) {
/* look up the address of the local host */
hp = gethostbyname(my_machine_name);
if (hp == NULL)
errx(EXIT_FAILURE, "%s: %s", my_machine_name,
hstrerror(h_errno));
memcpy(&my_machine_addr, hp->h_addr, sizeof(my_machine_addr));
hp = gethostbyname(his_machine_name);
if (hp == NULL)
errx(EXIT_FAILURE, "%s: %s", his_machine_name,
hstrerror(h_errno));
memcpy(&his_machine_addr, hp->h_addr, sizeof(his_machine_addr));
} else
his_machine_addr.s_addr = my_machine_addr.s_addr =
htonl(INADDR_LOOPBACK);
/* find the server's port */
sp = getservbyname("ntalk", "udp");
if (sp == 0)
errx(EXIT_FAILURE, "%s/%s: service is not registered.",
"ntalk", "udp");
daemon_port = sp->s_port;
}
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