talk.tproj/ctl.c

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