4.3BSD - /usr/src/ucb/talk/ctl.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[] = "@(#)ctl.c	5.2 (Berkeley) 3/13/86";
   9: #endif not lint
  10: 
  11: /*
  12:  * This file handles haggling with the various talk daemons to
  13:  * get a socket to talk to. sockt is opened and connected in
  14:  * the progress
  15:  */
  16: 
  17: #include "talk_ctl.h"
  18: 
  19: struct  sockaddr_in daemon_addr = { AF_INET };
  20: struct  sockaddr_in ctl_addr = { AF_INET };
  21: struct  sockaddr_in my_addr = { AF_INET };
  22: 
  23:     /* inet addresses of the two machines */
  24: struct  in_addr my_machine_addr;
  25: struct  in_addr his_machine_addr;
  26: 
  27: u_short daemon_port;    /* port number of the talk daemon */
  28: 
  29: int ctl_sockt;
  30: int sockt;
  31: int invitation_waiting = 0;
  32: 
  33: CTL_MSG msg;
  34: 
  35: open_sockt()
  36: {
  37:     int length;
  38: 
  39:     my_addr.sin_addr = my_machine_addr;
  40:     my_addr.sin_port = 0;
  41:     sockt = socket(AF_INET, SOCK_STREAM, 0);
  42:     if (sockt <= 0)
  43:         p_error("Bad socket");
  44:     if (bind(sockt, &my_addr, sizeof(my_addr)) != 0)
  45:         p_error("Binding local socket");
  46:     length = sizeof(my_addr);
  47:     if (getsockname(sockt, &my_addr, &length) == -1)
  48:         p_error("Bad address for socket");
  49: }
  50: 
  51: /* open the ctl socket */
  52: open_ctl()
  53: {
  54:     int length;
  55: 
  56:     ctl_addr.sin_port = 0;
  57:     ctl_addr.sin_addr = my_machine_addr;
  58:     ctl_sockt = socket(AF_INET, SOCK_DGRAM, 0);
  59:     if (ctl_sockt <= 0)
  60:         p_error("Bad socket");
  61:     if (bind(ctl_sockt, &ctl_addr, sizeof(ctl_addr), 0) != 0)
  62:         p_error("Couldn't bind to control socket");
  63:     length = sizeof(ctl_addr);
  64:     if (getsockname(ctl_sockt, &ctl_addr, &length) == -1)
  65:         p_error("Bad address for ctl socket");
  66: }
  67: 
  68: /* print_addr is a debug print routine */
  69: print_addr(addr)
  70:     struct sockaddr_in addr;
  71: {
  72:     int i;
  73: 
  74:     printf("addr = %x, port = %o, family = %o zero = ",
  75:         addr.sin_addr, addr.sin_port, addr.sin_family);
  76:     for (i = 0; i<8;i++)
  77:     printf("%o ", (int)addr.sin_zero[i]);
  78:     putchar('\n');
  79: }

Defined functions

Defined variables