usr.bin/talk/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  * 4. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #include <sys/cdefs.h>
  31
  32 __FBSDID("$FreeBSD$");
  33
  34 #ifndef lint
  35 static const char sccsid[] = "@(#)ctl.c 8.1 (Berkeley) 6/6/93";
  36 #endif
  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
  47 #include <string.h>
  48
  49 #include "talk.h"
  50 #include "talk_ctl.h"
  51
  52 struct  sockaddr_in daemon_addr = { .sin_len = sizeof(daemon_addr), .sin_family = AF_INET };
  53 struct  sockaddr_in ctl_addr = { .sin_len = sizeof(ctl_addr), .sin_family = AF_INET };
  54 struct  sockaddr_in my_addr = { .sin_len = sizeof(my_addr), .sin_family = AF_INET };
  55
  56         /* inet addresses of the two machines */
  57 struct  in_addr my_machine_addr;
  58 struct  in_addr his_machine_addr;
  59
  60 u_short daemon_port;    /* port number of the talk daemon */
  61
  62 int     ctl_sockt;
  63 int     sockt;
  64 int     invitation_waiting = 0;
  65
  66 CTL_MSG msg;
  67
  68 void
  69 open_sockt(void)
  70 {
  71         socklen_t length;
  72
  73         (void)memset(&my_addr, 0, sizeof(my_addr));
  74         my_addr.sin_family = AF_INET;
  75         my_addr.sin_len = sizeof(my_addr);
  76         my_addr.sin_addr = my_machine_addr;
  77         my_addr.sin_port = 0;
  78         sockt = socket(AF_INET, SOCK_STREAM, 0);
  79         if (sockt == -1)
  80                 p_error("Bad socket");
  81         if (bind(sockt, (struct sockaddr *)&my_addr, sizeof(my_addr)) != 0)
  82                 p_error("Binding local socket");
  83         length = sizeof(my_addr);
  84         if (getsockname(sockt, (struct sockaddr *)&my_addr, &length) == -1)
  85                 p_error("Bad address for socket");
  86 }
  87
  88 /* open the ctl socket */
  89 void
  90 open_ctl(void)
  91 {
  92         socklen_t length;
  93
  94         (void)memset(&ctl_addr, 0, sizeof(ctl_addr));
  95         ctl_addr.sin_family = AF_INET;
  96         ctl_addr.sin_len = sizeof(my_addr);
  97         ctl_addr.sin_port = 0;
  98         ctl_addr.sin_addr = my_machine_addr;
  99         ctl_sockt = socket(AF_INET, SOCK_DGRAM, 0);
 100         if (ctl_sockt == -1)
 101                 p_error("Bad socket");
 102         if (bind(ctl_sockt,
 103             (struct sockaddr *)&ctl_addr, sizeof(ctl_addr)) != 0)
 104                 p_error("Couldn't bind to control socket");
 105         length = sizeof(ctl_addr);
 106         if (getsockname(ctl_sockt,
 107             (struct sockaddr *)&ctl_addr, &length) == -1)
 108                 p_error("Bad address for ctl socket");
 109 }
 110
 111 /* print_addr is a debug print routine */
 112 void
 113 print_addr(struct sockaddr_in addr)
 114 {
 115         int i;
 116
 117         printf("addr = %lx, port = %o, family = %o zero = ",
 118                 (u_long)addr.sin_addr.s_addr, addr.sin_port, addr.sin_family);
 119         for (i = 0; i<8;i++)
 120         printf("%o ", (int)addr.sin_zero[i]);
 121         putchar('\n');
 122 }