| 1 | /* |
| 2 | * Copyright (c) 1983 Regents of the University of California. |
| 3 | * All rights reserved. The Berkeley software License Agreement |
| 4 | * specifies the terms and conditions for redistribution. |
| 5 | */ |
| 6 | |
| 7 | #ifndef lint |
| 8 | static char sccsid[] = "@(#)get_addrs.c 5.2 (Berkeley) %G%"; |
| 9 | #endif not lint |
| 10 | |
| 11 | #include "talk_ctl.h" |
| 12 | #include <netdb.h> |
| 13 | |
| 14 | get_addrs(my_machine_name, his_machine_name) |
| 15 | char *my_machine_name, *his_machine_name; |
| 16 | { |
| 17 | struct hostent *hp; |
| 18 | struct servent *sp; |
| 19 | |
| 20 | msg.pid = htonl(getpid()); |
| 21 | /* look up the address of the local host */ |
| 22 | hp = gethostbyname(my_machine_name); |
| 23 | if (hp == (struct hostent *) 0) { |
| 24 | fprintf(stderr, |
| 25 | "talk: %s: Can't figure out network address.\n", |
| 26 | my_machine_name); |
| 27 | exit(-1); |
| 28 | } |
| 29 | bcopy(hp->h_addr, (char *)&my_machine_addr, hp->h_length); |
| 30 | /* |
| 31 | * If the callee is on-machine, just copy the |
| 32 | * network address, otherwise do a lookup... |
| 33 | */ |
| 34 | if (strcmp(his_machine_name, my_machine_name)) { |
| 35 | hp = gethostbyname(his_machine_name); |
| 36 | if (hp == (struct hostent *) 0 ) { |
| 37 | fprintf(stderr, |
| 38 | "talk: %s: Can't figure out network address.\n", |
| 39 | his_machine_name); |
| 40 | exit(-1); |
| 41 | } |
| 42 | bcopy(hp->h_addr, (char *) &his_machine_addr, hp->h_length); |
| 43 | } else |
| 44 | his_machine_addr = my_machine_addr; |
| 45 | /* find the server's port */ |
| 46 | sp = getservbyname("ntalk", "udp"); |
| 47 | if (sp == 0) { |
| 48 | fprintf(stderr, "talk: %s/%s: service is not registered.\n", |
| 49 | "ntalk", "udp"); |
| 50 | exit(-1); |
| 51 | } |
| 52 | daemon_port = sp->s_port; |
| 53 | } |