1 /* $OpenBSD: ctl.c,v 1.13 2016/02/01 07:29:25 mestre Exp $ */ 2 /* $NetBSD: ctl.c,v 1.3 1994/12/09 02:14:10 jtc Exp $ */ 3 4 /* 5 * Copyright (c) 1983, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * This file handles haggling with the various talk daemons to 35 * get a socket to talk to. sockt is opened and connected in 36 * the progress 37 */ 38 39 #include <sys/socket.h> 40 #include <arpa/inet.h> 41 42 #include "talk.h" 43 44 struct sockaddr_in daemon_addr = { sizeof(daemon_addr), AF_INET }; 45 struct sockaddr_in ctl_addr = { sizeof(ctl_addr), AF_INET }; 46 struct sockaddr_in my_addr = { sizeof(my_addr), AF_INET }; 47 48 /* inet addresses of the two machines */ 49 struct in_addr my_machine_addr; 50 struct in_addr his_machine_addr; 51 52 u_short daemon_port; /* port number of the talk daemon */ 53 54 int ctl_sockt; 55 int sockt; 56 int invitation_waiting; 57 58 CTL_MSG msg; 59 60 void 61 open_sockt(void) 62 { 63 socklen_t length; 64 65 my_addr.sin_addr = my_machine_addr; 66 my_addr.sin_port = 0; 67 sockt = socket(AF_INET, SOCK_STREAM, 0); 68 if (sockt == -1) 69 quit("Bad socket", 1); 70 if (bind(sockt, (struct sockaddr *)&my_addr, sizeof(my_addr)) != 0) 71 quit("Binding local socket", 1); 72 length = sizeof(my_addr); 73 if (getsockname(sockt, (struct sockaddr *)&my_addr, &length) == -1) 74 quit("Bad address for socket", 1); 75 } 76 77 /* open the ctl socket */ 78 void 79 open_ctl(void) 80 { 81 socklen_t length; 82 83 ctl_addr.sin_port = 0; 84 ctl_addr.sin_addr = my_machine_addr; 85 ctl_sockt = socket(AF_INET, SOCK_DGRAM, 0); 86 if (ctl_sockt == -1) 87 quit("Bad socket", 1); 88 if (bind(ctl_sockt, 89 (struct sockaddr *)&ctl_addr, sizeof(ctl_addr)) != 0) 90 quit("Couldn't bind to control socket", 1); 91 length = sizeof(ctl_addr); 92 if (getsockname(ctl_sockt, 93 (struct sockaddr *)&ctl_addr, &length) == -1) 94 quit("Bad address for ctl socket", 1); 95 } 96