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 * 3. 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 * @(#)ctl.c 8.1 (Berkeley) 6/6/93 30 * $FreeBSD: src/usr.bin/talk/ctl.c,v 1.6 1999/08/28 01:06:10 peter Exp $ 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/types.h> 40 #include <sys/socket.h> 41 #include "talk.h" 42 43 struct sockaddr_in daemon_addr = { .sin_len = sizeof(daemon_addr), .sin_family = AF_INET }; 44 struct sockaddr_in ctl_addr = { .sin_len = sizeof(ctl_addr), .sin_family = AF_INET }; 45 struct sockaddr_in my_addr = { .sin_len = sizeof(my_addr), .sin_family = AF_INET }; 46 47 /* inet addresses of the two machines */ 48 struct in_addr my_machine_addr; 49 struct in_addr his_machine_addr; 50 51 u_short daemon_port; /* port number of the talk daemon */ 52 53 int ctl_sockt; 54 int sockt; 55 int invitation_waiting = 0; 56 57 CTL_MSG msg; 58 59 void 60 open_sockt(void) 61 { 62 int length; 63 64 my_addr.sin_addr = my_machine_addr; 65 my_addr.sin_port = 0; 66 sockt = socket(AF_INET, SOCK_STREAM, 0); 67 if (sockt <= 0) 68 p_error("Bad socket"); 69 if (bind(sockt, (struct sockaddr *)&my_addr, sizeof(my_addr)) != 0) 70 p_error("Binding local socket"); 71 length = sizeof(my_addr); 72 if (getsockname(sockt, (struct sockaddr *)&my_addr, &length) == -1) 73 p_error("Bad address for socket"); 74 } 75 76 /* open the ctl socket */ 77 void 78 open_ctl(void) 79 { 80 int length; 81 82 ctl_addr.sin_port = 0; 83 ctl_addr.sin_addr = my_machine_addr; 84 ctl_sockt = socket(AF_INET, SOCK_DGRAM, 0); 85 if (ctl_sockt <= 0) 86 p_error("Bad socket"); 87 if (bind(ctl_sockt, 88 (struct sockaddr *)&ctl_addr, sizeof(ctl_addr)) != 0) 89 p_error("Couldn't bind to control socket"); 90 length = sizeof(ctl_addr); 91 if (getsockname(ctl_sockt, 92 (struct sockaddr *)&ctl_addr, &length) == -1) 93 p_error("Bad address for ctl socket"); 94 } 95 96 /* print_addr is a debug print routine */ 97 void 98 print_addr(struct sockaddr_in addr) 99 { 100 int i; 101 102 printf("addr = %lx, port = %o, family = %o zero = ", 103 (u_long)addr.sin_addr.s_addr, addr.sin_port, addr.sin_family); 104 for (i = 0; i < 8; i++) 105 printf("%o ", (int)addr.sin_zero[i]); 106 putchar('\n'); 107 } 108