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