1 /* $OpenBSD: get_addrs.c,v 1.4 1998/08/18 04:02:11 millert 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. 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 41 static char rcsid[] = "$OpenBSD: get_addrs.c,v 1.4 1998/08/18 04:02:11 millert Exp $"; 42 #endif /* not lint */ 43 44 #include "talk.h" 45 #include <netdb.h> 46 #include <stdio.h> 47 #include <unistd.h> 48 #include "talk_ctl.h" 49 50 void 51 get_addrs(my_machine_name, his_machine_name) 52 char *my_machine_name, *his_machine_name; 53 { 54 struct hostent *hp; 55 struct servent *sp; 56 extern int h_errno; 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 errx(1, "%s: %s", my_machine_name, hstrerror(h_errno)); 63 bcopy(hp->h_addr, (char *)&my_machine_addr, hp->h_length); 64 /* 65 * If the callee is on-machine, just copy the 66 * network address, otherwise do a lookup... 67 */ 68 if (strcmp(his_machine_name, my_machine_name)) { 69 hp = gethostbyname(his_machine_name); 70 if (hp == NULL) 71 errx(1, "%s: %s", his_machine_name, hstrerror(h_errno)); 72 bcopy(hp->h_addr, (char *) &his_machine_addr, hp->h_length); 73 } else 74 his_machine_addr = my_machine_addr; 75 /* find the server's port */ 76 sp = getservbyname("ntalk", "udp"); 77 if (sp == NULL) 78 errx(1, "ntalk/udp: service is not registered."); 79 daemon_port = sp->s_port; 80 } 81