usr.bin/talk/ctl.c

   1 /*      $NetBSD: ctl.c,v 1.7 2004/03/20 17:07:33 christos 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. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 #if 0
  35 static char sccsid[] = "@(#)ctl.c       8.1 (Berkeley) 6/6/93";
  36 #endif
  37 __RCSID("$NetBSD: ctl.c,v 1.7 2004/03/20 17:07:33 christos Exp $");
  38 #endif /* not lint */
  39
  40 /*
  41  * This file handles haggling with the various talk daemons to
  42  * get a socket to talk to. sockt is opened and connected in
  43  * the progress
  44  */
  45
  46 #include "talk.h"
  47 #include <arpa/inet.h>
  48 #include "talk_ctl.h"
  49
  50 struct  sockaddr_in daemon_addr = { sizeof(daemon_addr), AF_INET, 0, {0}, {0} };
  51 struct  sockaddr_in ctl_addr = { sizeof(ctl_addr), AF_INET, 0, {0}, {0} };
  52 struct  sockaddr_in my_addr = { sizeof(my_addr), AF_INET, 0, {0}, {0} };
  53
  54         /* inet addresses of the two machines */
  55 struct  in_addr my_machine_addr;
  56 struct  in_addr his_machine_addr;
  57
  58 u_short daemon_port;    /* port number of the talk daemon */
  59
  60 int     ctl_sockt;
  61 int     sockt;
  62 int     invitation_waiting = 0;
  63
  64 CTL_MSG msg;
  65
  66 void
  67 open_sockt()
  68 {
  69         socklen_t length;
  70
  71
  72         (void)memset(&my_addr, 0, sizeof(my_addr));
  73         my_addr.sin_family = AF_INET;
  74 #ifdef BSD4_4
  75         my_addr.sin_len = sizeof(my_addr);
  76 #endif
  77         my_addr.sin_addr = my_machine_addr;
  78         my_addr.sin_port = 0;
  79         sockt = socket(AF_INET, SOCK_STREAM, 0);
  80         if (sockt == -1)
  81                 p_error("Bad socket");
  82         if (bind(sockt, (struct sockaddr *)&my_addr, sizeof(my_addr)) != 0)
  83                 p_error("Binding local socket");
  84         length = sizeof(my_addr);
  85         if (getsockname(sockt, (struct sockaddr *)&my_addr, &length) == -1)
  86                 p_error("Bad address for socket");
  87 }
  88
  89 /* open the ctl socket */
  90 void
  91 open_ctl()
  92 {
  93         socklen_t length;
  94
  95         (void)memset(&ctl_addr, 0, sizeof(ctl_addr));
  96         ctl_addr.sin_family = AF_INET;
  97 #ifdef BSD4_4
  98         ctl_addr.sin_len = sizeof(my_addr);
  99 #endif
 100         ctl_addr.sin_port = 0;
 101         ctl_addr.sin_addr = my_machine_addr;
 102         ctl_sockt = socket(AF_INET, SOCK_DGRAM, 0);
 103         if (ctl_sockt == -1)
 104                 p_error("Bad socket");
 105         if (bind(ctl_sockt,
 106             (struct sockaddr *)&ctl_addr, sizeof(ctl_addr)) != 0)
 107                 p_error("Couldn't bind to control socket");
 108         length = sizeof(ctl_addr);
 109         if (getsockname(ctl_sockt,
 110             (struct sockaddr *)&ctl_addr, &length) == -1)
 111                 p_error("Bad address for ctl socket");
 112 }
 113
 114 /* print_addr is a debug print routine */
 115 void
 116 print_addr(addr)
 117         struct sockaddr_in addr;
 118 {
 119         int i;
 120
 121         printf("addr = %s, port = %o, family = %o zero = ",
 122                 inet_ntoa(addr.sin_addr), addr.sin_port, addr.sin_family);
 123         for (i = 0; i<8;i++)
 124         printf("%o ", (int)addr.sin_zero[i]);
 125         putchar('\n');
 126 }