4.3BSD-Reno/src/usr.bin/talk/ctl.c

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that: (1) source distributions retain this entire copyright
 * notice and comment, and (2) distributions including binaries display
 * the following acknowledgement:  ``This product includes software
 * developed by the University of California, Berkeley and its contributors''
 * in the documentation or other materials provided with the distribution
 * and in all advertising materials mentioning features or use of this
 * software. 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
static char sccsid[] = "@(#)ctl.c	5.6 (Berkeley) 6/1/90";
#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 = { sizeof(daemon_addr), AF_INET };
struct	sockaddr_in ctl_addr = { sizeof(ctl_addr), AF_INET };
struct	sockaddr_in my_addr = { sizeof(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;

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, &my_addr, sizeof(my_addr)) != 0)
		p_error("Binding local socket");
	length = sizeof(my_addr);
	if (getsockname(sockt, &my_addr, &length) == -1)
		p_error("Bad address for socket");
}

/* open the ctl socket */
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, &ctl_addr, sizeof(ctl_addr), 0) != 0)
		p_error("Couldn't bind to control socket");
	length = sizeof(ctl_addr);
	if (getsockname(ctl_sockt, &ctl_addr, &length) == -1)
		p_error("Bad address for ctl socket");
}

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

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