/* $OpenBSD: get_addrs.c,v 1.4 1998/08/18 04:02:11 millert 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. 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 char rcsid[] = "$OpenBSD: get_addrs.c,v 1.4 1998/08/18 04:02:11 millert 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; extern int h_errno; 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; }