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ctl.c revision 1.3 
      1 /*	$NetBSD: ctl.c,v 1.3 1994/12/09 02:14:10 jtc Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1983, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #ifndef lint
     37 #if 0
     38 static char sccsid[] = "@(#)ctl.c	8.1 (Berkeley) 6/6/93";
     39 #endif
     40 static char rcsid[] = "$NetBSD: ctl.c,v 1.3 1994/12/09 02:14:10 jtc Exp $";
     41 #endif /* not lint */
     42 
     43 /*
     44  * This file handles haggling with the various talk daemons to
     45  * get a socket to talk to. sockt is opened and connected in
     46  * the progress
     47  */
     48 
     49 #include <sys/types.h>
     50 #include <sys/socket.h>
     51 #include <protocols/talkd.h>
     52 #include <netinet/in.h>
     53 #include "talk.h"
     54 #include "talk_ctl.h"
     55 
     56 struct	sockaddr_in daemon_addr = { sizeof(daemon_addr), AF_INET };
     57 struct	sockaddr_in ctl_addr = { sizeof(ctl_addr), AF_INET };
     58 struct	sockaddr_in my_addr = { sizeof(my_addr), AF_INET };
     59 
     60 	/* inet addresses of the two machines */
     61 struct	in_addr my_machine_addr;
     62 struct	in_addr his_machine_addr;
     63 
     64 u_short daemon_port;	/* port number of the talk daemon */
     65 
     66 int	ctl_sockt;
     67 int	sockt;
     68 int	invitation_waiting = 0;
     69 
     70 CTL_MSG msg;
     71 
     72 open_sockt()
     73 {
     74 	int length;
     75 
     76 	my_addr.sin_addr = my_machine_addr;
     77 	my_addr.sin_port = 0;
     78 	sockt = socket(AF_INET, SOCK_STREAM, 0);
     79 	if (sockt <= 0)
     80 		p_error("Bad socket");
     81 	if (bind(sockt, (struct sockaddr *)&my_addr, sizeof(my_addr)) != 0)
     82 		p_error("Binding local socket");
     83 	length = sizeof(my_addr);
     84 	if (getsockname(sockt, (struct sockaddr *)&my_addr, &length) == -1)
     85 		p_error("Bad address for socket");
     86 }
     87 
     88 /* open the ctl socket */
     89 open_ctl()
     90 {
     91 	int length;
     92 
     93 	ctl_addr.sin_port = 0;
     94 	ctl_addr.sin_addr = my_machine_addr;
     95 	ctl_sockt = socket(AF_INET, SOCK_DGRAM, 0);
     96 	if (ctl_sockt <= 0)
     97 		p_error("Bad socket");
     98 	if (bind(ctl_sockt,
     99 	    (struct sockaddr *)&ctl_addr, sizeof(ctl_addr)) != 0)
    100 		p_error("Couldn't bind to control socket");
    101 	length = sizeof(ctl_addr);
    102 	if (getsockname(ctl_sockt,
    103 	    (struct sockaddr *)&ctl_addr, &length) == -1)
    104 		p_error("Bad address for ctl socket");
    105 }
    106 
    107 /* print_addr is a debug print routine */
    108 print_addr(addr)
    109 	struct sockaddr_in addr;
    110 {
    111 	int i;
    112 
    113 	printf("addr = %x, port = %o, family = %o zero = ",
    114 		addr.sin_addr, addr.sin_port, addr.sin_family);
    115 	for (i = 0; i<8;i++)
    116 	printf("%o ", (int)addr.sin_zero[i]);
    117 	putchar('\n');
    118 }
    119