1 /* 2 * Copyright (c) 1983 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 /*static char sccsid[] = "from: @(#)get_addrs.c 5.7 (Berkeley) 3/1/91";*/ 36 static char rcsid[] = "$Id: get_addrs.c,v 1.2 1993/08/01 18:07:52 mycroft Exp $"; 37 #endif /* not lint */ 38 39 #include <sys/types.h> 40 #include <sys/socket.h> 41 #include <netinet/in.h> 42 #include <protocols/talkd.h> 43 #include <netdb.h> 44 #include <stdio.h> 45 #include "talk_ctl.h" 46 47 get_addrs(my_machine_name, his_machine_name) 48 char *my_machine_name, *his_machine_name; 49 { 50 struct hostent *hp; 51 struct servent *sp; 52 53 msg.pid = htonl(getpid()); 54 /* look up the address of the local host */ 55 hp = gethostbyname(my_machine_name); 56 if (hp == NULL) { 57 fprintf(stderr, "talk: %s: ", my_machine_name); 58 herror((char *)NULL); 59 exit(-1); 60 } 61 bcopy(hp->h_addr, (char *)&my_machine_addr, hp->h_length); 62 /* 63 * If the callee is on-machine, just copy the 64 * network address, otherwise do a lookup... 65 */ 66 if (strcmp(his_machine_name, my_machine_name)) { 67 hp = gethostbyname(his_machine_name); 68 if (hp == NULL) { 69 fprintf(stderr, "talk: %s: ", his_machine_name); 70 herror((char *)NULL); 71 exit(-1); 72 } 73 bcopy(hp->h_addr, (char *) &his_machine_addr, hp->h_length); 74 } else 75 his_machine_addr = my_machine_addr; 76 /* find the server's port */ 77 sp = getservbyname("ntalk", "udp"); 78 if (sp == 0) { 79 fprintf(stderr, "talk: %s/%s: service is not registered.\n", 80 "ntalk", "udp"); 81 exit(-1); 82 } 83 daemon_port = sp->s_port; 84 } 85