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 33 #ifndef lint 34 static const char sccsid[] = "@(#)ctl.c 8.1 (Berkeley) 6/6/93"; 35 #endif 36 37 /* 38 * This file handles haggling with the various talk daemons to 39 * get a socket to talk to. sockt is opened and connected in 40 * the progress 41 */ 42 43 #include <sys/types.h> 44 #include <sys/socket.h> 45 46 #include <string.h> 47 48 #include "talk.h" 49 #include "talk_ctl.h" 50 51 struct sockaddr_in daemon_addr = { .sin_len = sizeof(daemon_addr), .sin_family = AF_INET }; 52 struct sockaddr_in ctl_addr = { .sin_len = sizeof(ctl_addr), .sin_family = AF_INET }; 53 struct sockaddr_in my_addr = { .sin_len = sizeof(my_addr), .sin_family = AF_INET }; 54 55 /* inet addresses of the two machines */ 56 struct in_addr my_machine_addr; 57 struct in_addr his_machine_addr; 58 59 u_short daemon_port; /* port number of the talk daemon */ 60 61 int ctl_sockt; 62 int sockt; 63 int invitation_waiting = 0; 64 65 CTL_MSG msg; 66 67 void 68 open_sockt(void) 69 { 70 socklen_t length; 71 72 (void)memset(&my_addr, 0, sizeof(my_addr)); 73 my_addr.sin_family = AF_INET; 74 my_addr.sin_len = sizeof(my_addr); 75 my_addr.sin_addr = my_machine_addr; 76 my_addr.sin_port = 0; 77 sockt = socket(AF_INET, SOCK_STREAM, 0); 78 if (sockt == -1) 79 p_error("Bad socket"); 80 if (bind(sockt, (struct sockaddr *)&my_addr, sizeof(my_addr)) != 0) 81 p_error("Binding local socket"); 82 length = sizeof(my_addr); 83 if (getsockname(sockt, (struct sockaddr *)&my_addr, &length) == -1) 84 p_error("Bad address for socket"); 85 } 86 87 /* open the ctl socket */ 88 void 89 open_ctl(void) 90 { 91 socklen_t length; 92 93 (void)memset(&ctl_addr, 0, sizeof(ctl_addr)); 94 ctl_addr.sin_family = AF_INET; 95 ctl_addr.sin_len = sizeof(my_addr); 96 ctl_addr.sin_port = 0; 97 ctl_addr.sin_addr = my_machine_addr; 98 ctl_sockt = socket(AF_INET, SOCK_DGRAM, 0); 99 if (ctl_sockt == -1) 100 p_error("Bad socket"); 101 if (bind(ctl_sockt, 102 (struct sockaddr *)&ctl_addr, sizeof(ctl_addr)) != 0) 103 p_error("Couldn't bind to control socket"); 104 length = sizeof(ctl_addr); 105 if (getsockname(ctl_sockt, 106 (struct sockaddr *)&ctl_addr, &length) == -1) 107 p_error("Bad address for ctl socket"); 108 } 109 110 /* print_addr is a debug print routine */ 111 void 112 print_addr(struct sockaddr_in addr) 113 { 114 int i; 115 116 printf("addr = %lx, port = %o, family = %o zero = ", 117 (u_long)addr.sin_addr.s_addr, addr.sin_port, addr.sin_family); 118 for (i = 0; i<8;i++) 119 printf("%o ", (int)addr.sin_zero[i]); 120 putchar('\n'); 121 } 122