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. 131592Srgrimes * 3. All advertising materials mentioning features or use of this software 141592Srgrimes * must display the following acknowledgement: 151592Srgrimes * This product includes software developed by the University of 161592Srgrimes * California, Berkeley and its contributors. 171592Srgrimes * 4. Neither the name of the University nor the names of its contributors 181592Srgrimes * may be used to endorse or promote products derived from this software 191592Srgrimes * without specific prior written permission. 201592Srgrimes * 211592Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221592Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231592Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241592Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251592Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261592Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271592Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281592Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291592Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301592Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311592Srgrimes * SUCH DAMAGE. 321592Srgrimes */ 331592Srgrimes 341592Srgrimes#ifndef lint 3531491Scharnierstatic const char copyright[] = 361592Srgrimes"@(#) Copyright (c) 1983, 1993\n\ 371592Srgrimes The Regents of the University of California. All rights reserved.\n"; 381592Srgrimes#endif /* not lint */ 391592Srgrimes 401592Srgrimes#ifndef lint 4131491Scharnier#if 0 421592Srgrimesstatic char sccsid[] = "@(#)talkd.c 8.1 (Berkeley) 6/4/93"; 4331491Scharnier#endif 4431491Scharnierstatic const char rcsid[] = 4550476Speter "$FreeBSD$"; 461592Srgrimes#endif /* not lint */ 471592Srgrimes 481592Srgrimes/* 491592Srgrimes * The top level of the daemon, the format is heavily borrowed 508870Srgrimes * from rwhod.c. Basically: find out who and where you are; 511592Srgrimes * disconnect all descriptors and ttys, and then endless 521592Srgrimes * loop on waiting for and processing requests 531592Srgrimes */ 541592Srgrimes#include <sys/types.h> 551592Srgrimes#include <sys/socket.h> 565111Sache#include <sys/param.h> 57112998Sjmallett#include <netinet/in.h> 581592Srgrimes#include <protocols/talkd.h> 5931491Scharnier#include <err.h> 6031491Scharnier#include <errno.h> 6131491Scharnier#include <paths.h> 621592Srgrimes#include <signal.h> 6331491Scharnier#include <stdio.h> 6431491Scharnier#include <stdlib.h> 6531491Scharnier#include <string.h> 661592Srgrimes#include <syslog.h> 671592Srgrimes#include <time.h> 681592Srgrimes#include <unistd.h> 691592Srgrimes 7090261Simp#include "extern.h" 7190261Simp 72241777Sedstatic CTL_MSG request; 73241777Sedstatic CTL_RESPONSE response; 741592Srgrimes 75241777Sedint debug = 0; 76241777Sedstatic long lastmsgtime; 771592Srgrimes 78241777Sedchar hostname[MAXHOSTNAMELEN]; 791592Srgrimes 801592Srgrimes#define TIMEOUT 30 811592Srgrimes#define MAXIDLE 120 821592Srgrimes 8331491Scharnierint 8490261Simpmain(int argc, char *argv[]) 851592Srgrimes{ 861592Srgrimes register CTL_MSG *mp = &request; 871592Srgrimes int cc; 88120548Stjr struct sockaddr ctl_addr; 891592Srgrimes 9041440Sdillon#ifdef NOTDEF 9141440Sdillon /* 9241440Sdillon * removed so ntalkd can run in tty sandbox 9341440Sdillon */ 9431491Scharnier if (getuid()) 9531491Scharnier errx(1, "getuid: not super-user"); 9641440Sdillon#endif 971592Srgrimes openlog("talkd", LOG_PID, LOG_DAEMON); 9845422Sbrian if (gethostname(hostname, sizeof(hostname) - 1) < 0) { 991592Srgrimes syslog(LOG_ERR, "gethostname: %m"); 1001592Srgrimes _exit(1); 1011592Srgrimes } 10245422Sbrian hostname[sizeof(hostname) - 1] = '\0'; 1031592Srgrimes if (chdir(_PATH_DEV) < 0) { 1041592Srgrimes syslog(LOG_ERR, "chdir: %s: %m", _PATH_DEV); 1051592Srgrimes _exit(1); 1061592Srgrimes } 1071592Srgrimes if (argc > 1 && strcmp(argv[1], "-d") == 0) 1081592Srgrimes debug = 1; 1091592Srgrimes signal(SIGALRM, timeout); 1101592Srgrimes alarm(TIMEOUT); 1111592Srgrimes for (;;) { 112130496Sbms cc = recv(0, (char *)mp, sizeof(*mp), 0); 1131592Srgrimes if (cc != sizeof (*mp)) { 1141592Srgrimes if (cc < 0 && errno != EINTR) 1151592Srgrimes syslog(LOG_WARNING, "recv: %m"); 1161592Srgrimes continue; 1171592Srgrimes } 1181592Srgrimes lastmsgtime = time(0); 119120548Stjr (void)memcpy(&ctl_addr, &mp->ctl_addr, sizeof(ctl_addr)); 120120548Stjr ctl_addr.sa_family = ntohs(mp->ctl_addr.sa_family); 121120548Stjr ctl_addr.sa_len = sizeof(ctl_addr); 1221592Srgrimes process_request(mp, &response); 1231592Srgrimes /* can block here, is this what I want? */ 124130495Sbms cc = sendto(STDIN_FILENO, (char *)&response, 125130496Sbms sizeof(response), 0, &ctl_addr, sizeof(ctl_addr)); 1261592Srgrimes if (cc != sizeof (response)) 1271592Srgrimes syslog(LOG_WARNING, "sendto: %m"); 1281592Srgrimes } 1291592Srgrimes} 1301592Srgrimes 1311592Srgrimesvoid 13290261Simptimeout(int sig __unused) 1331592Srgrimes{ 13480248Skris int save_errno = errno; 1351592Srgrimes 1361592Srgrimes if (time(0) - lastmsgtime >= MAXIDLE) 1371592Srgrimes _exit(0); 1381592Srgrimes alarm(TIMEOUT); 13980248Skris errno = save_errno; 1401592Srgrimes} 141