11592Srgrimes/* 21592Srgrimes * Copyright (c) 1983, 1993 31592Srgrimes * The Regents of the University of California. All rights reserved. 41592Srgrimes * 51592Srgrimes * Redistribution and use in source and binary forms, with or without 61592Srgrimes * modification, are permitted provided that the following conditions 71592Srgrimes * are met: 81592Srgrimes * 1. Redistributions of source code must retain the above copyright 91592Srgrimes * notice, this list of conditions and the following disclaimer. 101592Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111592Srgrimes * notice, this list of conditions and the following disclaimer in the 121592Srgrimes * documentation and/or other materials provided with the distribution. 13262435Sbrueffer * 3. Neither the name of the University nor the names of its contributors 141592Srgrimes * may be used to endorse or promote products derived from this software 151592Srgrimes * without specific prior written permission. 161592Srgrimes * 171592Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 181592Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 191592Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201592Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 211592Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221592Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231592Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241592Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251592Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261592Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271592Srgrimes * SUCH DAMAGE. 281592Srgrimes */ 291592Srgrimes 301592Srgrimes#ifndef lint 3131491Scharnierstatic const char copyright[] = 321592Srgrimes"@(#) Copyright (c) 1983, 1993\n\ 331592Srgrimes The Regents of the University of California. All rights reserved.\n"; 341592Srgrimes#endif /* not lint */ 351592Srgrimes 361592Srgrimes#ifndef lint 3731491Scharnier#if 0 381592Srgrimesstatic char sccsid[] = "@(#)talkd.c 8.1 (Berkeley) 6/4/93"; 3931491Scharnier#endif 4031491Scharnierstatic const char rcsid[] = 4150476Speter "$FreeBSD$"; 421592Srgrimes#endif /* not lint */ 431592Srgrimes 441592Srgrimes/* 451592Srgrimes * The top level of the daemon, the format is heavily borrowed 468870Srgrimes * from rwhod.c. Basically: find out who and where you are; 471592Srgrimes * disconnect all descriptors and ttys, and then endless 481592Srgrimes * loop on waiting for and processing requests 491592Srgrimes */ 501592Srgrimes#include <sys/types.h> 511592Srgrimes#include <sys/socket.h> 525111Sache#include <sys/param.h> 53112998Sjmallett#include <netinet/in.h> 541592Srgrimes#include <protocols/talkd.h> 5531491Scharnier#include <err.h> 5631491Scharnier#include <errno.h> 5731491Scharnier#include <paths.h> 581592Srgrimes#include <signal.h> 5931491Scharnier#include <stdio.h> 6031491Scharnier#include <stdlib.h> 6131491Scharnier#include <string.h> 621592Srgrimes#include <syslog.h> 631592Srgrimes#include <time.h> 641592Srgrimes#include <unistd.h> 651592Srgrimes 6690261Simp#include "extern.h" 6790261Simp 68241777Sedstatic CTL_MSG request; 69241777Sedstatic CTL_RESPONSE response; 701592Srgrimes 71241777Sedint debug = 0; 72241777Sedstatic long lastmsgtime; 731592Srgrimes 74241777Sedchar hostname[MAXHOSTNAMELEN]; 751592Srgrimes 761592Srgrimes#define TIMEOUT 30 771592Srgrimes#define MAXIDLE 120 781592Srgrimes 7931491Scharnierint 8090261Simpmain(int argc, char *argv[]) 811592Srgrimes{ 821592Srgrimes register CTL_MSG *mp = &request; 831592Srgrimes int cc; 84120548Stjr struct sockaddr ctl_addr; 851592Srgrimes 8641440Sdillon#ifdef NOTDEF 8741440Sdillon /* 8841440Sdillon * removed so ntalkd can run in tty sandbox 8941440Sdillon */ 9031491Scharnier if (getuid()) 9131491Scharnier errx(1, "getuid: not super-user"); 9241440Sdillon#endif 931592Srgrimes openlog("talkd", LOG_PID, LOG_DAEMON); 9445422Sbrian if (gethostname(hostname, sizeof(hostname) - 1) < 0) { 951592Srgrimes syslog(LOG_ERR, "gethostname: %m"); 961592Srgrimes _exit(1); 971592Srgrimes } 9845422Sbrian hostname[sizeof(hostname) - 1] = '\0'; 991592Srgrimes if (chdir(_PATH_DEV) < 0) { 1001592Srgrimes syslog(LOG_ERR, "chdir: %s: %m", _PATH_DEV); 1011592Srgrimes _exit(1); 1021592Srgrimes } 1031592Srgrimes if (argc > 1 && strcmp(argv[1], "-d") == 0) 1041592Srgrimes debug = 1; 1051592Srgrimes signal(SIGALRM, timeout); 1061592Srgrimes alarm(TIMEOUT); 1071592Srgrimes for (;;) { 108130496Sbms cc = recv(0, (char *)mp, sizeof(*mp), 0); 1091592Srgrimes if (cc != sizeof (*mp)) { 1101592Srgrimes if (cc < 0 && errno != EINTR) 1111592Srgrimes syslog(LOG_WARNING, "recv: %m"); 1121592Srgrimes continue; 1131592Srgrimes } 1141592Srgrimes lastmsgtime = time(0); 115120548Stjr (void)memcpy(&ctl_addr, &mp->ctl_addr, sizeof(ctl_addr)); 116120548Stjr ctl_addr.sa_family = ntohs(mp->ctl_addr.sa_family); 117120548Stjr ctl_addr.sa_len = sizeof(ctl_addr); 1181592Srgrimes process_request(mp, &response); 1191592Srgrimes /* can block here, is this what I want? */ 120130495Sbms cc = sendto(STDIN_FILENO, (char *)&response, 121130496Sbms sizeof(response), 0, &ctl_addr, sizeof(ctl_addr)); 1221592Srgrimes if (cc != sizeof (response)) 1231592Srgrimes syslog(LOG_WARNING, "sendto: %m"); 1241592Srgrimes } 1251592Srgrimes} 1261592Srgrimes 1271592Srgrimesvoid 12890261Simptimeout(int sig __unused) 1291592Srgrimes{ 13080248Skris int save_errno = errno; 1311592Srgrimes 1321592Srgrimes if (time(0) - lastmsgtime >= MAXIDLE) 1331592Srgrimes _exit(0); 1341592Srgrimes alarm(TIMEOUT); 13580248Skris errno = save_errno; 1361592Srgrimes} 137