talk.tproj/ctl.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * Copyright (c) 1983, 1993
  27  *      The Regents of the University of California.  All rights reserved.
  28  *
  29  * Redistribution and use in source and binary forms, with or without
  30  * modification, are permitted provided that the following conditions
  31  * are met:
  32  * 1. Redistributions of source code must retain the above copyright
  33  *    notice, this list of conditions and the following disclaimer.
  34  * 2. Redistributions in binary form must reproduce the above copyright
  35  *    notice, this list of conditions and the following disclaimer in the
  36  *    documentation and/or other materials provided with the distribution.
  37  * 3. All advertising materials mentioning features or use of this software
  38  *    must display the following acknowledgement:
  39  *      This product includes software developed by the University of
  40  *      California, Berkeley and its contributors.
  41  * 4. Neither the name of the University nor the names of its contributors
  42  *    may be used to endorse or promote products derived from this software
  43  *    without specific prior written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  */
  57
  58
  59 /*
  60  * This file handles haggling with the various talk daemons to
  61  * get a socket to talk to. sockt is opened and connected in
  62  * the progress
  63  */
  64
  65 #include <sys/types.h>
  66 #include <sys/socket.h>
  67 #include <protocols/talkd.h>
  68 #include <netinet/in.h>
  69 #include "talk.h"
  70 #include "talk_ctl.h"
  71
  72 struct  sockaddr_in daemon_addr = { sizeof(daemon_addr), AF_INET };
  73 struct  sockaddr_in ctl_addr = { sizeof(ctl_addr), AF_INET };
  74 struct  sockaddr_in my_addr = { sizeof(my_addr), AF_INET };
  75
  76         /* inet addresses of the two machines */
  77 struct  in_addr my_machine_addr;
  78 struct  in_addr his_machine_addr;
  79
  80 u_short daemon_port;    /* port number of the talk daemon */
  81
  82 int     ctl_sockt;
  83 int     sockt;
  84 int     invitation_waiting = 0;
  85
  86 CTL_MSG msg;
  87
  88 open_sockt()
  89 {
  90         int length;
  91
  92         my_addr.sin_addr = my_machine_addr;
  93         my_addr.sin_port = 0;
  94         sockt = socket(AF_INET, SOCK_STREAM, 0);
  95         if (sockt <= 0)
  96                 p_error("Bad socket");
  97         if (bind(sockt, (struct sockaddr *)&my_addr, sizeof(my_addr)) != 0)
  98                 p_error("Binding local socket");
  99         length = sizeof(my_addr);
 100         if (getsockname(sockt, (struct sockaddr *)&my_addr, &length) == -1)
 101                 p_error("Bad address for socket");
 102 }
 103
 104 /* open the ctl socket */
 105 open_ctl()
 106 {
 107         int length;
 108
 109         ctl_addr.sin_port = 0;
 110         ctl_addr.sin_addr = my_machine_addr;
 111         ctl_sockt = socket(AF_INET, SOCK_DGRAM, 0);
 112         if (ctl_sockt <= 0)
 113                 p_error("Bad socket");
 114         if (bind(ctl_sockt,
 115             (struct sockaddr *)&ctl_addr, sizeof(ctl_addr)) != 0)
 116                 p_error("Couldn't bind to control socket");
 117         length = sizeof(ctl_addr);
 118         if (getsockname(ctl_sockt,
 119             (struct sockaddr *)&ctl_addr, &length) == -1)
 120                 p_error("Bad address for ctl socket");
 121 }
 122
 123 /* print_addr is a debug print routine */
 124 print_addr(addr)
 125         struct sockaddr_in addr;
 126 {
 127         int i;
 128
 129         printf("addr = %x, port = %o, family = %o zero = ",
 130                 addr.sin_addr, addr.sin_port, addr.sin_family);
 131         for (i = 0; i<8;i++)
 132         printf("%o ", (int)addr.sin_zero[i]);
 133         putchar('\n');
 134 }