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/*
* Copyright (C) 2011 Tildeslash Ltd. All rights reserved.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
*
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
#include <config.h>
#ifdef HAVE_STDIO_H
#include <stdio.h>
#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
#include "monitor.h"
#include "net.h"
#include "engine.h"
/* Private prototypes */
static void *thread_wrapper(void *arg);
/* The HTTP Thread */
static pthread_t thread;
static volatile int running = FALSE;
/**
* Facade functions for the cervlet sub-system. Start/Stop the monit
* http server and check if monit http can start.
*
* @author Jan-Henrik Haukeland, <hauk@tildeslash.com>
*
* @file
*/
/* ------------------------------------------------------------------ Public */
/**
* @return TRUE if the monit http can start and is specified in the
* controlfile to start, otherwise return FALSE. Print an error
* message if monit httpd _should_ start but can't.
*/
int can_http() {
if(Run.dohttpd && Run.isdaemon) {
if(! has_hosts_allow() && ! Run.credentials) {
LogError("%s: monit httpd not started since no connect allowed\n",
prog);
return FALSE;
}
return TRUE;
}
return FALSE;
}
/**
* Start and stop the monit http server
* @param action START_HTTP or STOP_HTTP
*/
void monit_http(int action) {
int status;
switch(action) {
case STOP_HTTP:
if(!running) break;
LogInfo("Shutting down %s HTTP server\n", prog);
stop_httpd();
if( (status= pthread_join(thread, NULL)) != 0) {
LogError("%s: Failed to stop the http server. Thread error -- %s.\n",
prog, strerror(status));
} else {
LogInfo("%s HTTP server stopped\n", prog);
running = FALSE;
}
break;
case START_HTTP:
LogInfo("Starting %s HTTP server at [%s:%d]\n",
prog, Run.bind_addr?Run.bind_addr:"*", Run.httpdport);
if( (status= pthread_create(&thread, NULL, thread_wrapper, NULL)) != 0) {
LogError("%s: Failed to create the http server. Thread error -- %s.\n",
prog, strerror(status));
} else {
LogInfo("%s HTTP server started\n", prog);
running = TRUE;
}
break;
default:
LogError("%s: Unknown http server action\n", prog);
break;
}
return;
}
/* ----------------------------------------------------------------- Private */
static void *thread_wrapper(void *arg) {
sigset_t ns;
/* Block collective signals in the http thread. The http server is
* taken down gracefully by signaling the main monit thread */
set_signal_block(&ns, NULL);
start_httpd(Run.httpdport, 1024, Run.bind_addr);
return NULL;
}
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