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/*
Copyright (c) 1998 - 2011
ILK - Tilburg University
CNTS - University of Antwerp
This file is part of timblserver
timblserver 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 3 of the License, or
(at your option) any later version.
timblserver 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/>.
For questions and suggestions, see:
http://ilk.uvt.nl/software.html
or send mail to:
timbl@uvt.nl
*/
#include <string>
#include <cstdlib>
#include <cstdio>
#include <signal.h>
#include <iostream>
#include "timbl/Types.h"
#include "timblserver/SocketBasics.h"
using namespace std;
//
// a simple program to demonstrate and test the Timbl Socket interface
//
int globalTimeOut = 0; // evil
void *do_child( void *arg ){
Sockets::Socket *mysock = (Sockets::Socket*)arg;
// Greeting message for the client
//
//
mysock->write( "Welcome to the Timbl socket tester.\n" );
// process the test material
//
char line[256];
sprintf( line, "Server: Thread %lu, on Socket %d",
(uintptr_t)pthread_self(),
mysock->getSockId() );
cerr << line << ", started" << endl;
string buf;
while( mysock->read( buf ) ){
cerr << "Server: read()" << buf << endl;
string answer = string( "echo: " ) + buf + "\n";
mysock->write( answer );
cerr << "Server: wrote()" << answer << endl;
}
if ( !mysock->getMessage().empty() )
cerr << "Server result: " << mysock->getMessage() << endl;
delete mysock;
return NULL;
}
int randomSecs(){
long int r = random();
ldiv_t dif = ldiv( r, 5 );
return abs(dif.rem);
}
void *do_to_child( void *arg ){
Sockets::Socket *mysock = (Sockets::Socket*)arg;
// Greeting message for the client
//
//
int timeOut = globalTimeOut;
int snorr = randomSecs();
cerr << "Server sleeps " << snorr << " seconds" << endl;
sleep( snorr);
mysock->write( "Welcome to the Timbl socket tester.\n", timeOut );
// process the test material
//
char line[256];
sprintf( line, "ToServer: Thread %lu, on Socket %d",
(uintptr_t)pthread_self(),
mysock->getSockId() );
cerr << line << ", started" << endl;
string buf;
while( mysock->read( buf, timeOut ) ){
cerr << "ToServer: read()" << buf << endl;
string answer = string( "echo: " ) + buf + "\n";
int snorr = randomSecs();
cerr << "Server sleeps " << snorr << " seconds" << endl;
sleep( snorr);
mysock->write( answer, timeOut );
cerr << "ToServer: wrote()" << answer << endl;
}
if ( !mysock->getMessage().empty() )
cerr << "Toserver result: " << mysock->getMessage() << endl;
delete mysock;
return NULL;
}
bool startServer( const string& portString ){
Sockets::ServerSocket server;
pthread_attr_t attr;
if ( pthread_attr_init(&attr) ||
pthread_attr_setdetachstate( &attr, PTHREAD_CREATE_DETACHED ) ){
cerr << "Threads: couldn't set attributes" << endl;
return false;
}
if ( !server.connect( portString ) ){
cerr << "failed to start Server: " << server.getMessage() << endl;
return false;
}
if ( !server.listen( 5 ) ) {
// maximum of 5 pending requests
cerr << server.getMessage() << endl;
return false;
}
cerr << "Started Server on port:" << portString << endl;
int failcount = 0;
while( true ){ // waiting for connections loop
signal( SIGPIPE, SIG_IGN );
Sockets::ServerSocket *newSocket = new Sockets::ServerSocket();
if ( !server.accept( *newSocket ) ){
cerr << server.getMessage() << endl;
if ( ++failcount > 20 ){
cerr << "accept failcount >20 " << endl;
cerr << "server stopped." << endl;
return false;
}
else {
continue;
}
}
else {
failcount = 0;
cerr << "Server: Accepting Connection #" << newSocket->getSockId()
<< " from remote host: " << newSocket->getClientName() << endl;
// create a new thread to process the incoming request
// (The thread will terminate itself when done processing
// and release its socket handle)
//
pthread_t chld_thr;
if ( globalTimeOut > 0 ){
newSocket->setNonBlocking();
pthread_create( &chld_thr, &attr, do_to_child, (void *)newSocket );
}
else
pthread_create( &chld_thr, &attr, do_child, (void *)newSocket );
}
// the server is now free to accept another socket request
}
pthread_attr_destroy(&attr);
return true;
}
int main( int argc, const char *argv[] ){
string port = "1234";
string tos = "0";
if ( argc > 1 )
port = argv[1];
if ( argc > 2 )
tos = argv[2];
int timeOut;
if ( !Timbl::stringTo<int>( tos, timeOut ) ){
cerr << "invalid timeout" << endl;
cerr << "usage: " << argv[0] << " <port> <timeout>" << endl;
return 1;
}
else
globalTimeOut = timeOut;
if ( !startServer( port ) ){
cerr << "creating server failed" << endl;
}
cerr << "Server DONE" << endl;
return 0;
}
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