BSD 4_4_Lite2 release

[unix-history] / usr / src / old / talk / talk / ctl.c

/*-
* Copyright (c) 1983, 1985
*      The Regents of the University of California.  All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by the University of
*      California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#ifndef lint
static char sccsid[] = "@(#)ctl.c       5.1 (Berkeley) 6/6/85";
#endif not lint

/*
* This file handles haggling with the various talk daemons to
* get a socket to talk to. sockt is opened and connected in
* the progress
*/

#include "talk_ctl.h"

struct  sockaddr_in daemon_addr = { AF_INET };
struct  sockaddr_in ctl_addr = { AF_INET };
struct  sockaddr_in my_addr = { AF_INET };

   /* inet addresses of the two machines */
struct  in_addr my_machine_addr;
struct  in_addr his_machine_addr;

u_short daemon_port;    /* port number of the talk daemon */

int     ctl_sockt;
int     sockt;
int     invitation_waiting = 0;

CTL_MSG msg;

void
open_sockt()
{
   int length;

   my_addr.sin_addr = my_machine_addr;
   my_addr.sin_port = 0;
   sockt = socket(AF_INET, SOCK_STREAM, 0);
   if (sockt <= 0)
       p_error("Bad socket");
   if (bind(sockt, (struct sockaddr *)&my_addr, sizeof(my_addr)) != 0)
       p_error("Binding local socket");
   length = sizeof(my_addr);
   if (getsockname(sockt, (struct sockaddr *)&my_addr, &length) == -1)
       p_error("Bad address for socket");
}

/* open the ctl socket */
void
open_ctl() 
{
   int length;

   ctl_addr.sin_port = 0;
   ctl_addr.sin_addr = my_machine_addr;
   ctl_sockt = socket(AF_INET, SOCK_DGRAM, 0);
   if (ctl_sockt <= 0)
       p_error("Bad socket");
   if (bind(ctl_sockt, (struct sockaddr *)&ctl_addr, sizeof(ctl_addr)) != 0)
       p_error("Couldn't bind to control socket");
   length = sizeof(ctl_addr);
   if (getsockname(ctl_sockt, (struct sockaddr *)&ctl_addr, &length) == -1)
       p_error("Bad address for ctl socket");
}

/* print_addr is a debug print routine */
void
print_addr(addr)
   struct sockaddr_in addr;
{
   int i;

   printf("addr = %lx, port = %o, family = %o zero = ",
           (long)addr.sin_addr.s_addr, addr.sin_port, addr.sin_family);
   for (i = 0; i<8;i++)
       printf("%o ", (int)addr.sin_zero[i]);
   putchar('\n');
}