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 } 123