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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)ctl.c 8.1 (Berkeley) 6/6/93 34 * $FreeBSD: src/usr.bin/talk/ctl.c,v 1.6 1999/08/28 01:06:10 peter Exp $ 35 * $DragonFly: src/usr.bin/talk/ctl.c,v 1.2 2003/06/17 04:29:32 dillon Exp $ 36 */ 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 #include "talk.h" 47 48 struct sockaddr_in daemon_addr = { sizeof(daemon_addr), AF_INET }; 49 struct sockaddr_in ctl_addr = { sizeof(ctl_addr), AF_INET }; 50 struct sockaddr_in my_addr = { sizeof(my_addr), 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() 66 { 67 int length; 68 69 my_addr.sin_addr = my_machine_addr; 70 my_addr.sin_port = 0; 71 sockt = socket(AF_INET, SOCK_STREAM, 0); 72 if (sockt <= 0) 73 p_error("Bad socket"); 74 if (bind(sockt, (struct sockaddr *)&my_addr, sizeof(my_addr)) != 0) 75 p_error("Binding local socket"); 76 length = sizeof(my_addr); 77 if (getsockname(sockt, (struct sockaddr *)&my_addr, &length) == -1) 78 p_error("Bad address for socket"); 79 } 80 81 /* open the ctl socket */ 82 void 83 open_ctl() 84 { 85 int length; 86 87 ctl_addr.sin_port = 0; 88 ctl_addr.sin_addr = my_machine_addr; 89 ctl_sockt = socket(AF_INET, SOCK_DGRAM, 0); 90 if (ctl_sockt <= 0) 91 p_error("Bad socket"); 92 if (bind(ctl_sockt, 93 (struct sockaddr *)&ctl_addr, sizeof(ctl_addr)) != 0) 94 p_error("Couldn't bind to control socket"); 95 length = sizeof(ctl_addr); 96 if (getsockname(ctl_sockt, 97 (struct sockaddr *)&ctl_addr, &length) == -1) 98 p_error("Bad address for ctl socket"); 99 } 100 101 /* print_addr is a debug print routine */ 102 void 103 print_addr(addr) 104 struct sockaddr_in addr; 105 { 106 int i; 107 108 printf("addr = %lx, port = %o, family = %o zero = ", 109 (u_long)addr.sin_addr.s_addr, addr.sin_port, addr.sin_family); 110 for (i = 0; i<8;i++) 111 printf("%o ", (int)addr.sin_zero[i]); 112 putchar('\n'); 113 } 114