remote_cmds/talk.tproj/ctl.c

   1 /*
   2  * Copyright (c) 1983, 1993
   3  *      The Regents of the University of California.  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 #include <sys/cdefs.h>
  35
  36 #ifndef __APPLE__
  37 __FBSDID("$FreeBSD: src/usr.bin/talk/ctl.c,v 1.10 2005/02/09 09:13:36 stefanf Exp $");
  38
  39 #ifndef lint
  40 static const char sccsid[] = "@(#)ctl.c 8.1 (Berkeley) 6/6/93";
  41 #endif
  42 #endif /* __APPLE__ */
  43
  44 /*
  45  * This file handles haggling with the various talk daemons to
  46  * get a socket to talk to. sockt is opened and connected in
  47  * the progress
  48  */
  49
  50 #include <sys/types.h>
  51 #include <sys/socket.h>
  52
  53 #include <string.h>
  54
  55 #include "talk.h"
  56
  57 struct  sockaddr_in daemon_addr = { sizeof(daemon_addr), AF_INET };
  58 struct  sockaddr_in ctl_addr = { sizeof(ctl_addr), AF_INET };
  59 struct  sockaddr_in my_addr = { sizeof(my_addr), AF_INET };
  60
  61         /* inet addresses of the two machines */
  62 struct  in_addr my_machine_addr;
  63 struct  in_addr his_machine_addr;
  64
  65 u_short daemon_port;    /* port number of the talk daemon */
  66
  67 int     ctl_sockt;
  68 int     sockt;
  69 int     invitation_waiting = 0;
  70
  71 CTL_MSG msg;
  72
  73 void
  74 open_sockt()
  75 {
  76         socklen_t length;
  77
  78         (void)memset(&my_addr, 0, sizeof(my_addr));
  79         my_addr.sin_family = AF_INET;
  80         my_addr.sin_len = sizeof(my_addr);
  81         my_addr.sin_addr = my_machine_addr;
  82         my_addr.sin_port = 0;
  83         sockt = socket(AF_INET, SOCK_STREAM, 0);
  84         if (sockt == -1)
  85                 p_error("Bad socket");
  86         if (bind(sockt, (struct sockaddr *)&my_addr, sizeof(my_addr)) != 0)
  87                 p_error("Binding local socket");
  88         length = sizeof(my_addr);
  89         if (getsockname(sockt, (struct sockaddr *)&my_addr, &length) == -1)
  90                 p_error("Bad address for socket");
  91 }
  92
  93 /* open the ctl socket */
  94 void
  95 open_ctl()
  96 {
  97         socklen_t length;
  98
  99         (void)memset(&ctl_addr, 0, sizeof(ctl_addr));
 100         ctl_addr.sin_family = AF_INET;
 101         ctl_addr.sin_len = sizeof(my_addr);
 102         ctl_addr.sin_port = 0;
 103         ctl_addr.sin_addr = my_machine_addr;
 104         ctl_sockt = socket(AF_INET, SOCK_DGRAM, 0);
 105         if (ctl_sockt == -1)
 106                 p_error("Bad socket");
 107         if (bind(ctl_sockt,
 108             (struct sockaddr *)&ctl_addr, sizeof(ctl_addr)) != 0)
 109                 p_error("Couldn't bind to control socket");
 110         length = sizeof(ctl_addr);
 111         if (getsockname(ctl_sockt,
 112             (struct sockaddr *)&ctl_addr, &length) == -1)
 113                 p_error("Bad address for ctl socket");
 114 }
 115
 116 /* print_addr is a debug print routine */
 117 void
 118 print_addr(addr)
 119         struct sockaddr_in addr;
 120 {
 121         int i;
 122
 123         printf("addr = %lx, port = %o, family = %o zero = ",
 124                 (u_long)addr.sin_addr.s_addr, addr.sin_port, addr.sin_family);
 125         for (i = 0; i<8;i++)
 126         printf("%o ", (int)addr.sin_zero[i]);
 127         putchar('\n');
 128 }