4.3BSD - /usr/src/ucb/talk/get_addrs.c

   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) 3/13/86";
   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: }

Defined functions

Defined variables