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ctl.c revision 1.1 
      1 /*
      2  * Copyright (c) 1983 Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #ifndef lint
     35 static char sccsid[] = "@(#)ctl.c	5.7 (Berkeley) 3/1/91";
     36 #endif /* not lint */
     37 
     38 /*
     39  * This file handles haggling with the various talk daemons to
     40  * get a socket to talk to. sockt is opened and connected in
     41  * the progress
     42  */
     43 
     44 #include <sys/types.h>
     45 #include <sys/socket.h>
     46 #include <protocols/talkd.h>
     47 #include <netinet/in.h>
     48 #include "talk.h"
     49 #include "talk_ctl.h"
     50 
     51 struct	sockaddr_in daemon_addr = { sizeof(daemon_addr), AF_INET };
     52 struct	sockaddr_in ctl_addr = { sizeof(ctl_addr), AF_INET };
     53 struct	sockaddr_in my_addr = { sizeof(my_addr), AF_INET };
     54 
     55 	/* inet addresses of the two machines */
     56 struct	in_addr my_machine_addr;
     57 struct	in_addr his_machine_addr;
     58 
     59 u_short daemon_port;	/* port number of the talk daemon */
     60 
     61 int	ctl_sockt;
     62 int	sockt;
     63 int	invitation_waiting = 0;
     64 
     65 CTL_MSG msg;
     66 
     67 open_sockt()
     68 {
     69 	int length;
     70 
     71 	my_addr.sin_addr = my_machine_addr;
     72 	my_addr.sin_port = 0;
     73 	sockt = socket(AF_INET, SOCK_STREAM, 0);
     74 	if (sockt <= 0)
     75 		p_error("Bad socket");
     76 	if (bind(sockt, (struct sockaddr *)&my_addr, sizeof(my_addr)) != 0)
     77 		p_error("Binding local socket");
     78 	length = sizeof(my_addr);
     79 	if (getsockname(sockt, (struct sockaddr *)&my_addr, &length) == -1)
     80 		p_error("Bad address for socket");
     81 }
     82 
     83 /* open the ctl socket */
     84 open_ctl()
     85 {
     86 	int length;
     87 
     88 	ctl_addr.sin_port = 0;
     89 	ctl_addr.sin_addr = my_machine_addr;
     90 	ctl_sockt = socket(AF_INET, SOCK_DGRAM, 0);
     91 	if (ctl_sockt <= 0)
     92 		p_error("Bad socket");
     93 	if (bind(ctl_sockt,
     94 	    (struct sockaddr *)&ctl_addr, sizeof(ctl_addr)) != 0)
     95 		p_error("Couldn't bind to control socket");
     96 	length = sizeof(ctl_addr);
     97 	if (getsockname(ctl_sockt,
     98 	    (struct sockaddr *)&ctl_addr, &length) == -1)
     99 		p_error("Bad address for ctl socket");
    100 }
    101 
    102 /* print_addr is a debug print routine */
    103 print_addr(addr)
    104 	struct sockaddr_in addr;
    105 {
    106 	int i;
    107 
    108 	printf("addr = %x, port = %o, family = %o zero = ",
    109 		addr.sin_addr, addr.sin_port, addr.sin_family);
    110 	for (i = 0; i<8;i++)
    111 	printf("%o ", (int)addr.sin_zero[i]);
    112 	putchar('\n');
    113 }
    114