ctl.c revision 37453
11590Srgrimes/* 21590Srgrimes * Copyright (c) 1983, 1993 31590Srgrimes * The Regents of the University of California. All rights reserved. 41590Srgrimes * 51590Srgrimes * Redistribution and use in source and binary forms, with or without 61590Srgrimes * modification, are permitted provided that the following conditions 71590Srgrimes * are met: 81590Srgrimes * 1. Redistributions of source code must retain the above copyright 91590Srgrimes * notice, this list of conditions and the following disclaimer. 101590Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111590Srgrimes * notice, this list of conditions and the following disclaimer in the 121590Srgrimes * documentation and/or other materials provided with the distribution. 131590Srgrimes * 3. All advertising materials mentioning features or use of this software 141590Srgrimes * must display the following acknowledgement: 151590Srgrimes * This product includes software developed by the University of 161590Srgrimes * California, Berkeley and its contributors. 171590Srgrimes * 4. Neither the name of the University nor the names of its contributors 181590Srgrimes * may be used to endorse or promote products derived from this software 191590Srgrimes * without specific prior written permission. 201590Srgrimes * 211590Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221590Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231590Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241590Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251590Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261590Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271590Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281590Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291590Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301590Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311590Srgrimes * SUCH DAMAGE. 321590Srgrimes */ 331590Srgrimes 341590Srgrimes#ifndef lint 3532503Scharnier#if 0 361590Srgrimesstatic char sccsid[] = "@(#)ctl.c 8.1 (Berkeley) 6/6/93"; 3732503Scharnier#endif 3832503Scharnierstatic const char rcsid[] = 3937453Sbde "$Id: ctl.c,v 1.4 1998/01/14 07:20:59 charnier Exp $"; 401590Srgrimes#endif /* not lint */ 411590Srgrimes 421590Srgrimes/* 431590Srgrimes * This file handles haggling with the various talk daemons to 441590Srgrimes * get a socket to talk to. sockt is opened and connected in 451590Srgrimes * the progress 461590Srgrimes */ 471590Srgrimes 481590Srgrimes#include <sys/types.h> 491590Srgrimes#include <sys/socket.h> 501590Srgrimes#include "talk.h" 511590Srgrimes 521590Srgrimesstruct sockaddr_in daemon_addr = { sizeof(daemon_addr), AF_INET }; 531590Srgrimesstruct sockaddr_in ctl_addr = { sizeof(ctl_addr), AF_INET }; 541590Srgrimesstruct sockaddr_in my_addr = { sizeof(my_addr), AF_INET }; 551590Srgrimes 561590Srgrimes /* inet addresses of the two machines */ 571590Srgrimesstruct in_addr my_machine_addr; 581590Srgrimesstruct in_addr his_machine_addr; 591590Srgrimes 601590Srgrimesu_short daemon_port; /* port number of the talk daemon */ 611590Srgrimes 621590Srgrimesint ctl_sockt; 631590Srgrimesint sockt; 641590Srgrimesint invitation_waiting = 0; 651590Srgrimes 661590SrgrimesCTL_MSG msg; 671590Srgrimes 6814443Sjoergvoid 691590Srgrimesopen_sockt() 701590Srgrimes{ 711590Srgrimes int length; 721590Srgrimes 731590Srgrimes my_addr.sin_addr = my_machine_addr; 741590Srgrimes my_addr.sin_port = 0; 751590Srgrimes sockt = socket(AF_INET, SOCK_STREAM, 0); 761590Srgrimes if (sockt <= 0) 771590Srgrimes p_error("Bad socket"); 781590Srgrimes if (bind(sockt, (struct sockaddr *)&my_addr, sizeof(my_addr)) != 0) 791590Srgrimes p_error("Binding local socket"); 801590Srgrimes length = sizeof(my_addr); 811590Srgrimes if (getsockname(sockt, (struct sockaddr *)&my_addr, &length) == -1) 821590Srgrimes p_error("Bad address for socket"); 831590Srgrimes} 841590Srgrimes 851590Srgrimes/* open the ctl socket */ 8614443Sjoergvoid 878874Srgrimesopen_ctl() 881590Srgrimes{ 891590Srgrimes int length; 901590Srgrimes 911590Srgrimes ctl_addr.sin_port = 0; 921590Srgrimes ctl_addr.sin_addr = my_machine_addr; 931590Srgrimes ctl_sockt = socket(AF_INET, SOCK_DGRAM, 0); 941590Srgrimes if (ctl_sockt <= 0) 951590Srgrimes p_error("Bad socket"); 961590Srgrimes if (bind(ctl_sockt, 971590Srgrimes (struct sockaddr *)&ctl_addr, sizeof(ctl_addr)) != 0) 981590Srgrimes p_error("Couldn't bind to control socket"); 991590Srgrimes length = sizeof(ctl_addr); 1001590Srgrimes if (getsockname(ctl_sockt, 1011590Srgrimes (struct sockaddr *)&ctl_addr, &length) == -1) 1021590Srgrimes p_error("Bad address for ctl socket"); 1031590Srgrimes} 1041590Srgrimes 1051590Srgrimes/* print_addr is a debug print routine */ 10614443Sjoergvoid 1071590Srgrimesprint_addr(addr) 1081590Srgrimes struct sockaddr_in addr; 1091590Srgrimes{ 1101590Srgrimes int i; 1111590Srgrimes 11214443Sjoerg printf("addr = %lx, port = %o, family = %o zero = ", 11337453Sbde (u_long)addr.sin_addr.s_addr, addr.sin_port, addr.sin_family); 1141590Srgrimes for (i = 0; i<8;i++) 1151590Srgrimes printf("%o ", (int)addr.sin_zero[i]); 1161590Srgrimes putchar('\n'); 1171590Srgrimes} 118