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285926046a
remote peer will be connected through. This avoids the ``Checking for invitation on caller's machine'' problem for multi-homed hosts. Thanks to: Garrett, for his `find_interface' example
116 lines
3.7 KiB
C
116 lines
3.7 KiB
C
/*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)ctl.c 8.1 (Berkeley) 6/6/93";
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#endif /* not lint */
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/*
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* This file handles haggling with the various talk daemons to
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* get a socket to talk to. sockt is opened and connected in
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* the progress
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <protocols/talkd.h>
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#include <netinet/in.h>
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#include "talk.h"
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#include "talk_ctl.h"
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struct sockaddr_in daemon_addr = { sizeof(daemon_addr), AF_INET };
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struct sockaddr_in ctl_addr = { sizeof(ctl_addr), AF_INET };
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struct sockaddr_in my_addr = { sizeof(my_addr), AF_INET };
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/* inet addresses of the two machines */
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struct in_addr my_machine_addr;
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struct in_addr his_machine_addr;
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u_short daemon_port; /* port number of the talk daemon */
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int ctl_sockt;
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int sockt;
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int invitation_waiting = 0;
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CTL_MSG msg;
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void
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open_sockt()
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{
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int length;
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my_addr.sin_addr = my_machine_addr;
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my_addr.sin_port = 0;
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sockt = socket(AF_INET, SOCK_STREAM, 0);
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if (sockt <= 0)
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p_error("Bad socket");
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if (bind(sockt, (struct sockaddr *)&my_addr, sizeof(my_addr)) != 0)
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p_error("Binding local socket");
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length = sizeof(my_addr);
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if (getsockname(sockt, (struct sockaddr *)&my_addr, &length) == -1)
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p_error("Bad address for socket");
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}
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/* open the ctl socket */
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void
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open_ctl()
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{
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int length;
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ctl_addr.sin_port = 0;
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ctl_addr.sin_addr = my_machine_addr;
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ctl_sockt = socket(AF_INET, SOCK_DGRAM, 0);
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if (ctl_sockt <= 0)
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p_error("Bad socket");
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if (bind(ctl_sockt,
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(struct sockaddr *)&ctl_addr, sizeof(ctl_addr)) != 0)
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p_error("Couldn't bind to control socket");
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length = sizeof(ctl_addr);
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if (getsockname(ctl_sockt,
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(struct sockaddr *)&ctl_addr, &length) == -1)
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p_error("Bad address for ctl socket");
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}
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/* print_addr is a debug print routine */
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void
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print_addr(addr)
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struct sockaddr_in addr;
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{
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int i;
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printf("addr = %lx, port = %o, family = %o zero = ",
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addr.sin_addr.s_addr, addr.sin_port, addr.sin_family);
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for (i = 0; i<8;i++)
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printf("%o ", (int)addr.sin_zero[i]);
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putchar('\n');
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}
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