1 /* $NetBSD: get_addrs.c,v 1.3 1994/12/09 02:14:14 jtc Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)get_addrs.c 8.1 (Berkeley) 6/6/93"; 39 #endif 40 static char rcsid[] = "$NetBSD: get_addrs.c,v 1.3 1994/12/09 02:14:14 jtc Exp $"; 41 #endif /* not lint */ 42 43 #include <sys/types.h> 44 #include <sys/socket.h> 45 #include <netinet/in.h> 46 #include <protocols/talkd.h> 47 #include <netdb.h> 48 #include <stdio.h> 49 #include "talk_ctl.h" 50 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 57 msg.pid = htonl(getpid()); 58 /* look up the address of the local host */ 59 hp = gethostbyname(my_machine_name); 60 if (hp == NULL) { 61 fprintf(stderr, "talk: %s: ", my_machine_name); 62 herror((char *)NULL); 63 exit(-1); 64 } 65 bcopy(hp->h_addr, (char *)&my_machine_addr, hp->h_length); 66 /* 67 * If the callee is on-machine, just copy the 68 * network address, otherwise do a lookup... 69 */ 70 if (strcmp(his_machine_name, my_machine_name)) { 71 hp = gethostbyname(his_machine_name); 72 if (hp == NULL) { 73 fprintf(stderr, "talk: %s: ", his_machine_name); 74 herror((char *)NULL); 75 exit(-1); 76 } 77 bcopy(hp->h_addr, (char *) &his_machine_addr, hp->h_length); 78 } else 79 his_machine_addr = my_machine_addr; 80 /* find the server's port */ 81 sp = getservbyname("ntalk", "udp"); 82 if (sp == 0) { 83 fprintf(stderr, "talk: %s/%s: service is not registered.\n", 84 "ntalk", "udp"); 85 exit(-1); 86 } 87 daemon_port = sp->s_port; 88 } 89