| 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[] = "@(#)get_addrs.c 5.7 (Berkeley) 3/1/91"; |
| 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 | } |