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 34 #ifndef lint 35 static char sccsid[] = "@(#)ctl.c 8.1 (Berkeley) 6/6/93"; 36 #endif /* not lint */ 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 <protocols/talkd.h> 47 #include <netinet/in.h> 48 #include "talk.h" 49 #include "talk_ctl.h" 50 51 struct sockaddr_in daemon_addr = { sizeof(daemon_addr), AF_INET }; 52 struct sockaddr_in ctl_addr = { sizeof(ctl_addr), AF_INET }; 53 struct sockaddr_in my_addr = { sizeof(my_addr), 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() 69 { 70 int length; 71 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 <= 0) 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() 87 { 88 int length; 89 90 ctl_addr.sin_port = 0; 91 ctl_addr.sin_addr = my_machine_addr; 92 ctl_sockt = socket(AF_INET, SOCK_DGRAM, 0); 93 if (ctl_sockt <= 0) 94 p_error("Bad socket"); 95 if (bind(ctl_sockt, 96 (struct sockaddr *)&ctl_addr, sizeof(ctl_addr)) != 0) 97 p_error("Couldn't bind to control socket"); 98 length = sizeof(ctl_addr); 99 if (getsockname(ctl_sockt, 100 (struct sockaddr *)&ctl_addr, &length) == -1) 101 p_error("Bad address for ctl socket"); 102 } 103 104 /* print_addr is a debug print routine */ 105 void 106 print_addr(addr) 107 struct sockaddr_in addr; 108 { 109 int i; 110 111 printf("addr = %lx, port = %o, family = %o zero = ", 112 addr.sin_addr.s_addr, addr.sin_port, addr.sin_family); 113 for (i = 0; i<8;i++) 114 printf("%o ", (int)addr.sin_zero[i]); 115 putchar('\n'); 116 } 117