1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. 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[] = "@(#)get_addrs.c 8.1 (Berkeley) 6/6/93"; 36 #endif /* not lint */ 37 38 #include <sys/types.h> 39 #include <sys/socket.h> 40 #include <netinet/in.h> 41 #include <protocols/talkd.h> 42 #include <netdb.h> 43 #include <stdio.h> 44 #include "talk_ctl.h" 45 46 get_addrs(my_machine_name, his_machine_name) 47 char *my_machine_name, *his_machine_name; 48 { 49 struct hostent *hp; 50 struct servent *sp; 51 52 msg.pid = htonl(getpid()); 53 /* look up the address of the local host */ 54 hp = gethostbyname(my_machine_name); 55 if (hp == NULL) { 56 fprintf(stderr, "talk: %s: ", my_machine_name); 57 herror((char *)NULL); 58 exit(-1); 59 } 60 bcopy(hp->h_addr, (char *)&my_machine_addr, hp->h_length); 61 /* 62 * If the callee is on-machine, just copy the 63 * network address, otherwise do a lookup... 64 */ 65 if (strcmp(his_machine_name, my_machine_name)) { 66 hp = gethostbyname(his_machine_name); 67 if (hp == NULL) { 68 fprintf(stderr, "talk: %s: ", his_machine_name); 69 herror((char *)NULL); 70 exit(-1); 71 } 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 == 0) { 78 fprintf(stderr, "talk: %s/%s: service is not registered.\n", 79 "ntalk", "udp"); 80 exit(-1); 81 } 82 daemon_port = sp->s_port; 83 } 84