File: [local] / src / usr.bin / talk / get_addrs.c (download)
Revision 1.7, Tue Mar 16 01:11:09 2004 UTC (20 years, 3 months ago) by tedu
Branch: MAIN
CVS Tags: OPENBSD_4_6_BASE, OPENBSD_4_6, OPENBSD_4_5_BASE, OPENBSD_4_5, OPENBSD_4_4_BASE, OPENBSD_4_4, OPENBSD_4_3_BASE, OPENBSD_4_3, OPENBSD_4_2_BASE, OPENBSD_4_2, OPENBSD_4_1_BASE, OPENBSD_4_1, OPENBSD_4_0_BASE, OPENBSD_4_0, OPENBSD_3_9_BASE, OPENBSD_3_9, OPENBSD_3_8_BASE, OPENBSD_3_8, OPENBSD_3_7_BASE, OPENBSD_3_7, OPENBSD_3_6_BASE, OPENBSD_3_6, OPENBSD_3_5_BASE, OPENBSD_3_5 Changes since 1.6: +2 -3 lines
errno is not specified to be int, but something from errno.h. ok millert@
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/* $OpenBSD: get_addrs.c,v 1.7 2004/03/16 01:11:09 tedu Exp $ */
/* $NetBSD: get_addrs.c,v 1.3 1994/12/09 02:14:14 jtc 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.
*/
#ifndef lint
#if 0
static char sccsid[] = "@(#)get_addrs.c 8.1 (Berkeley) 6/6/93";
#endif
static const char rcsid[] = "$OpenBSD: get_addrs.c,v 1.7 2004/03/16 01:11:09 tedu Exp $";
#endif /* not lint */
#include "talk.h"
#include <netdb.h>
#include <stdio.h>
#include <unistd.h>
#include "talk_ctl.h"
void
get_addrs(my_machine_name, his_machine_name)
char *my_machine_name, *his_machine_name;
{
struct hostent *hp;
struct servent *sp;
msg.pid = htonl(getpid());
/* look up the address of the local host */
hp = gethostbyname(my_machine_name);
if (hp == NULL)
errx(1, "%s: %s", my_machine_name, hstrerror(h_errno));
bcopy(hp->h_addr, (char *)&my_machine_addr, hp->h_length);
/*
* If the callee is on-machine, just copy the
* network address, otherwise do a lookup...
*/
if (strcmp(his_machine_name, my_machine_name)) {
hp = gethostbyname(his_machine_name);
if (hp == NULL)
errx(1, "%s: %s", his_machine_name, hstrerror(h_errno));
bcopy(hp->h_addr, (char *) &his_machine_addr, hp->h_length);
} else
his_machine_addr = my_machine_addr;
/* find the server's port */
sp = getservbyname("ntalk", "udp");
if (sp == NULL)
errx(1, "ntalk/udp: service is not registered.");
daemon_port = sp->s_port;
}