talk/ctl.c - master - niceSOFT/inetutils

talk/ctl.c
124 строки4 KB
Simon Josefsson
maint: Run 'make update-copyright'
20 янв 2026, 11:50
20 янв 2026, 11:501ce61cd
/*
  Copyright (C) 1995-2026 Free Software Foundation, Inc.

  This file is part of GNU Inetutils.

  GNU Inetutils is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or (at
  your option) any later version.

  GNU Inetutils is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see `http://www.gnu.org/licenses/'. */

/*
 * Copyright (c) 1983, 1993
 *	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. 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.
 */

/*
 * 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 <config.h>

#include <sys/types.h>
#include <sys/socket.h>
#include <protocols/talkd.h>
#include <netinet/in.h>
#include "talk.h"
#include "talk_ctl.h"

struct sockaddr_in daemon_addr;
struct sockaddr_in ctl_addr;
struct sockaddr_in my_addr;

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

unsigned short daemon_port;	/* port number of the talk daemon */

int ctl_sockt;
int sockt;
int invitation_waiting = 0;

CTL_MSG msg;

int
open_sockt (void)
{
  socklen_t length;

  my_addr.sin_family = AF_INET;
#ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
  my_addr.sin_len = sizeof (my_addr);
#endif
  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");

  return 0;
}

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

  ctl_addr.sin_family = AF_INET;
#ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
  ctl_addr.sin_len = sizeof (ctl_addr);
#endif
  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");

  return 0;
}