1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 34 __FBSDID("$FreeBSD$"); 35 36 #ifndef lint 37 static const char sccsid[] = "@(#)ctl.c 8.1 (Berkeley) 6/6/93"; 38 #endif 39 40 /* 41 * This file handles haggling with the various talk daemons to 42 * get a socket to talk to. sockt is opened and connected in 43 * the progress 44 */ 45 46 #include <sys/types.h> 47 #include <sys/socket.h> 48 49 #include <string.h> 50 51 #include "talk.h" 52 #include "talk_ctl.h" 53 54 struct sockaddr_in daemon_addr = { .sin_len = sizeof(daemon_addr), .sin_family = AF_INET }; 55 struct sockaddr_in ctl_addr = { .sin_len = sizeof(ctl_addr), .sin_family = AF_INET }; 56 struct sockaddr_in my_addr = { .sin_len = sizeof(my_addr), .sin_family = AF_INET }; 57 58 /* inet addresses of the two machines */ 59 struct in_addr my_machine_addr; 60 struct in_addr his_machine_addr; 61 62 u_short daemon_port; /* port number of the talk daemon */ 63 64 int ctl_sockt; 65 int sockt; 66 int invitation_waiting = 0; 67 68 CTL_MSG msg; 69 70 void 71 open_sockt(void) 72 { 73 socklen_t length; 74 75 (void)memset(&my_addr, 0, sizeof(my_addr)); 76 my_addr.sin_family = AF_INET; 77 my_addr.sin_len = sizeof(my_addr); 78 my_addr.sin_addr = my_machine_addr; 79 my_addr.sin_port = 0; 80 sockt = socket(AF_INET, SOCK_STREAM, 0); 81 if (sockt == -1) 82 p_error("Bad socket"); 83 if (bind(sockt, (struct sockaddr *)&my_addr, sizeof(my_addr)) != 0) 84 p_error("Binding local socket"); 85 length = sizeof(my_addr); 86 if (getsockname(sockt, (struct sockaddr *)&my_addr, &length) == -1) 87 p_error("Bad address for socket"); 88 } 89 90 /* open the ctl socket */ 91 void 92 open_ctl(void) 93 { 94 socklen_t length; 95 96 (void)memset(&ctl_addr, 0, sizeof(ctl_addr)); 97 ctl_addr.sin_family = AF_INET; 98 ctl_addr.sin_len = sizeof(my_addr); 99 ctl_addr.sin_port = 0; 100 ctl_addr.sin_addr = my_machine_addr; 101 ctl_sockt = socket(AF_INET, SOCK_DGRAM, 0); 102 if (ctl_sockt == -1) 103 p_error("Bad socket"); 104 if (bind(ctl_sockt, 105 (struct sockaddr *)&ctl_addr, sizeof(ctl_addr)) != 0) 106 p_error("Couldn't bind to control socket"); 107 length = sizeof(ctl_addr); 108 if (getsockname(ctl_sockt, 109 (struct sockaddr *)&ctl_addr, &length) == -1) 110 p_error("Bad address for ctl socket"); 111 } 112 113 /* print_addr is a debug print routine */ 114 void 115 print_addr(struct sockaddr_in addr) 116 { 117 int i; 118 119 printf("addr = %lx, port = %o, family = %o zero = ", 120 (u_long)addr.sin_addr.s_addr, addr.sin_port, addr.sin_family); 121 for (i = 0; i<8;i++) 122 printf("%o ", (int)addr.sin_zero[i]); 123 putchar('\n'); 124 } 125