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/*
* miracle_server.c
* Copyright (C) 2002-2003 Ushodaya Enterprises Limited
* Author: Charles Yates <charles.yates@pandora.be>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* System header files */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <fcntl.h>
#include <pthread.h>
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <netinet/in.h>
#include <netdb.h>
#include <errno.h>
#include <arpa/inet.h>
/* Application header files */
#include "miracle_server.h"
#include "miracle_connection.h"
#include "miracle_local.h"
#include "miracle_log.h"
#include "miracle_commands.h"
#include <valerie/valerie_remote.h>
#include <valerie/valerie_tokeniser.h>
#define VERSION "0.0.1"
static void miracle_command_received( mlt_listener listener, mlt_properties owner, miracle_server this, void **args )
{
if ( listener != NULL )
listener( owner, this, ( valerie_response ** )args[ 0 ], ( char * )args[ 1 ] );
}
static void miracle_doc_received( mlt_listener listener, mlt_properties owner, miracle_server this, void **args )
{
if ( listener != NULL )
listener( owner, this, ( valerie_response ** )args[ 0 ], ( char * )args[ 1 ], ( char * )args[ 2 ] );
}
static void miracle_push_received( mlt_listener listener, mlt_properties owner, miracle_server this, void **args )
{
if ( listener != NULL )
listener( owner, this, ( valerie_response ** )args[ 0 ], ( char * )args[ 1 ], ( mlt_service )args[ 2 ] );
}
/** Initialise a server structure.
*/
miracle_server miracle_server_init( char *id )
{
miracle_server server = malloc( sizeof( miracle_server_t ) );
if ( server != NULL )
memset( server, 0, sizeof( miracle_server_t ) );
if ( server != NULL && mlt_properties_init( &server->parent, server ) == 0 )
{
server->id = id;
server->port = DEFAULT_TCP_PORT;
server->socket = -1;
server->shutdown = 1;
mlt_events_init( &server->parent );
mlt_events_register( &server->parent, "command-received", ( mlt_transmitter )miracle_command_received );
mlt_events_register( &server->parent, "doc-received", ( mlt_transmitter )miracle_doc_received );
mlt_events_register( &server->parent, "push-received", ( mlt_transmitter )miracle_push_received );
}
return server;
}
const char *miracle_server_id( miracle_server server )
{
return server != NULL && server->id != NULL ? server->id : "miracle";
}
void miracle_server_set_config( miracle_server server, const char *config )
{
if ( server != NULL )
{
free( server->config );
server->config = config != NULL ? strdup( config ) : NULL;
}
}
/** Set the port of the server.
*/
void miracle_server_set_port( miracle_server server, int port )
{
server->port = port;
}
void miracle_server_set_proxy( miracle_server server, char *proxy )
{
valerie_tokeniser tokeniser = valerie_tokeniser_init( );
server->proxy = 1;
server->remote_port = DEFAULT_TCP_PORT;
valerie_tokeniser_parse_new( tokeniser, proxy, ":" );
strcpy( server->remote_server, valerie_tokeniser_get_string( tokeniser, 0 ) );
if ( valerie_tokeniser_count( tokeniser ) == 2 )
server->remote_port = atoi( valerie_tokeniser_get_string( tokeniser, 1 ) );
valerie_tokeniser_close( tokeniser );
}
/** Wait for a connection.
*/
static int miracle_server_wait_for_connect( miracle_server server )
{
struct timeval tv;
fd_set rfds;
/* Wait for a 1 second. */
tv.tv_sec = 1;
tv.tv_usec = 0;
FD_ZERO( &rfds );
FD_SET( server->socket, &rfds );
return select( server->socket + 1, &rfds, NULL, NULL, &tv);
}
/** Run the server thread.
*/
static void *miracle_server_run( void *arg )
{
miracle_server server = arg;
pthread_t cmd_parse_info;
connection_t *tmp = NULL;
pthread_attr_t thread_attributes;
socklen_t socksize;
socksize = sizeof( struct sockaddr );
miracle_log( LOG_NOTICE, "%s version %s listening on port %i", server->id, VERSION, server->port );
/* Create the initial thread. We want all threads to be created detached so
their resources get freed automatically. (CY: ... hmmph...) */
pthread_attr_init( &thread_attributes );
pthread_attr_setdetachstate( &thread_attributes, PTHREAD_CREATE_DETACHED );
while ( !server->shutdown )
{
/* Wait for a new connection. */
if ( miracle_server_wait_for_connect( server ) )
{
/* Create a new block of data to hold a copy of the incoming connection for
our server thread. The thread should free this when it terminates. */
tmp = (connection_t*) malloc( sizeof(connection_t) );
tmp->owner = &server->parent;
tmp->parser = server->parser;
tmp->fd = accept( server->socket, (struct sockaddr*) &(tmp->sin), &socksize );
/* Pass the connection to a parser thread :-/ */
if ( tmp->fd != -1 )
pthread_create( &cmd_parse_info, &thread_attributes, parser_thread, tmp );
}
}
miracle_log( LOG_NOTICE, "%s version %s server terminated.", server->id, VERSION );
return NULL;
}
/** Execute the server thread.
*/
int miracle_server_execute( miracle_server server )
{
int error = 0;
valerie_response response = NULL;
int index = 0;
struct sockaddr_in ServerAddr;
int flag = 1;
server->shutdown = 0;
ServerAddr.sin_family = AF_INET;
ServerAddr.sin_port = htons( server->port );
ServerAddr.sin_addr.s_addr = INADDR_ANY;
/* Create socket, and bind to port. Listen there. Backlog = 5
should be sufficient for listen (). */
server->socket = socket( AF_INET, SOCK_STREAM, 0 );
if ( server->socket == -1 )
{
server->shutdown = 1;
perror( "socket" );
miracle_log( LOG_ERR, "%s unable to create socket.", server->id );
return -1;
}
setsockopt( server->socket, SOL_SOCKET, SO_REUSEADDR, (char *)&flag, sizeof( int ) );
if ( bind( server->socket, (struct sockaddr *) &ServerAddr, sizeof (ServerAddr) ) != 0 )
{
server->shutdown = 1;
perror( "bind" );
miracle_log( LOG_ERR, "%s unable to bind to port %d.", server->id, server->port );
return -1;
}
if ( listen( server->socket, 5 ) != 0 )
{
server->shutdown = 1;
perror( "listen" );
miracle_log( LOG_ERR, "%s unable to listen on port %d.", server->id, server->port );
return -1;
}
fcntl( server->socket, F_SETFL, O_NONBLOCK );
if ( !server->proxy )
{
miracle_log( LOG_NOTICE, "Starting server on %d.", server->port );
server->parser = miracle_parser_init_local( );
}
else
{
miracle_log( LOG_NOTICE, "Starting proxy for %s:%d on %d.", server->remote_server, server->remote_port, server->port );
server->parser = valerie_parser_init_remote( server->remote_server, server->remote_port );
}
response = valerie_parser_connect( server->parser );
if ( response != NULL && valerie_response_get_error_code( response ) == 100 )
{
/* read configuration file */
if ( response != NULL && !server->proxy && server->config != NULL )
{
valerie_response_close( response );
response = valerie_parser_run( server->parser, server->config );
if ( valerie_response_count( response ) > 1 )
{
if ( valerie_response_get_error_code( response ) > 299 )
miracle_log( LOG_ERR, "Error evaluating server configuration. Processing stopped." );
for ( index = 0; index < valerie_response_count( response ); index ++ )
miracle_log( LOG_DEBUG, "%4d: %s", index, valerie_response_get_line( response, index ) );
}
}
if ( response != NULL )
{
int result;
valerie_response_close( response );
result = pthread_create( &server->thread, NULL, miracle_server_run, server );
if ( result )
{
miracle_log( LOG_CRIT, "Failed to launch TCP listener thread" );
error = -1;
}
}
}
else
{
miracle_log( LOG_ERR, "Error connecting to parser. Processing stopped." );
server->shutdown = 1;
error = -1;
}
return error;
}
/** Fetch a units properties
*/
mlt_properties miracle_server_fetch_unit( miracle_server server, int index )
{
miracle_unit unit = miracle_get_unit( index );
return unit != NULL ? unit->properties : NULL;
}
/** Shutdown the server.
*/
void miracle_server_shutdown( miracle_server server )
{
if ( server != NULL && !server->shutdown )
{
server->shutdown = 1;
pthread_join( server->thread, NULL );
miracle_server_set_config( server, NULL );
valerie_parser_close( server->parser );
server->parser = NULL;
close( server->socket );
}
}
/** Close the server.
*/
void miracle_server_close( miracle_server server )
{
if ( server != NULL && mlt_properties_dec_ref( &server->parent ) <= 0 )
{
mlt_properties_close( &server->parent );
miracle_server_shutdown( server );
free( server );
}
}
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