/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#include <log4cxx/logstring.h>
#include <log4cxx/helpers/datagramsocket.h>
#include <log4cxx/helpers/datagrampacket.h>
#include <log4cxx/helpers/loglog.h>
#include <log4cxx/helpers/transcoder.h>

#include "apr_network_io.h"
#include "apr_lib.h"

using namespace log4cxx::helpers;

IMPLEMENT_LOG4CXX_OBJECT(DatagramSocket)

DatagramSocket::DatagramSocket()
	: socket(0), address(), localAddress(), port(0), localPort(0)
{
	create();
}

DatagramSocket::DatagramSocket(int localPort1)
	: socket(0), address(), localAddress(), port(0), localPort(0)
{
	InetAddressPtr bindAddr = InetAddress::anyAddress();

	create();
	bind(localPort1, bindAddr);
}

DatagramSocket::DatagramSocket(int localPort1, InetAddressPtr localAddress1)
	: socket(0), address(), localAddress(), port(0), localPort(0)
{
	create();
	bind(localPort1, localAddress1);
}

DatagramSocket::~DatagramSocket()
{
	try
	{
		close();
	}
	catch (SocketException&)
	{
	}
}

/**  Binds a datagram socket to a local port and address.*/
void DatagramSocket::bind(int localPort1, InetAddressPtr localAddress1)
{
	Pool addrPool;

	// Create server socket address (including port number)
	LOG4CXX_ENCODE_CHAR(hostAddr, localAddress1->getHostAddress());
	apr_sockaddr_t* server_addr;
	apr_status_t status =
		apr_sockaddr_info_get(&server_addr, hostAddr.c_str(), APR_INET,
			localPort1, 0, addrPool.getAPRPool());

	if (status != APR_SUCCESS)
	{
		throw BindException(status);
	}

	// bind the socket to the address
	status = apr_socket_bind(socket, server_addr);

	if (status != APR_SUCCESS)
	{
		throw BindException(status);
	}

	this->localPort = localPort1;
	this->localAddress = localAddress1;
}

/** Close the socket.*/
void DatagramSocket::close()
{
	if (socket != 0)
	{
		apr_status_t status = apr_socket_close(socket);

		if (status != APR_SUCCESS)
		{
			throw SocketException(status);
		}

		socket = 0;
		localPort = 0;
	}
}

void DatagramSocket::connect(InetAddressPtr address1, int port1)
{

	this->address = address1;
	this->port = port1;

	Pool addrPool;

	// create socket address
	LOG4CXX_ENCODE_CHAR(hostAddr, address1->getHostAddress());
	apr_sockaddr_t* client_addr;
	apr_status_t status =
		apr_sockaddr_info_get(&client_addr, hostAddr.c_str(), APR_INET,
			port, 0, addrPool.getAPRPool());

	if (status != APR_SUCCESS)
	{
		throw ConnectException(status);
	}

	// connect the socket
	status = apr_socket_connect(socket, client_addr);

	if (status != APR_SUCCESS)
	{
		throw ConnectException(status);
	}
}

/** Creates a datagram socket.*/
void DatagramSocket::create()
{
	apr_socket_t* newSocket;
	apr_status_t status =
		apr_socket_create(&newSocket, APR_INET, SOCK_DGRAM,
			APR_PROTO_UDP, socketPool.getAPRPool());
	socket = newSocket;

	if (status != APR_SUCCESS)
	{
		throw SocketException(status);
	}
}

/** Receive the datagram packet.*/
void DatagramSocket::receive(DatagramPacketPtr& p)
{
	Pool addrPool;

	// Create the address from which to receive the datagram packet
	LOG4CXX_ENCODE_CHAR(hostAddr, p->getAddress()->getHostAddress());
	apr_sockaddr_t* addr;
	apr_status_t status =
		apr_sockaddr_info_get(&addr, hostAddr.c_str(), APR_INET,
			p->getPort(), 0, addrPool.getAPRPool());

	if (status != APR_SUCCESS)
	{
		throw SocketException(status);
	}

	// receive the datagram packet
	apr_size_t len = p->getLength();
	status = apr_socket_recvfrom(addr, socket, 0,
			(char*)p->getData(), &len);

	if (status != APR_SUCCESS)
	{
		throw IOException(status);
	}
}

/**  Sends a datagram packet.*/
void DatagramSocket::send(DatagramPacketPtr& p)
{
	Pool addrPool;

	// create the adress to which to send the datagram packet
	LOG4CXX_ENCODE_CHAR(hostAddr, p->getAddress()->getHostAddress());
	apr_sockaddr_t* addr;
	apr_status_t status =
		apr_sockaddr_info_get(&addr, hostAddr.c_str(), APR_INET, p->getPort(),
			0, addrPool.getAPRPool());

	if (status != APR_SUCCESS)
	{
		throw SocketException(status);
	}

	// send the datagram packet
	apr_size_t len = p->getLength();
	status = apr_socket_sendto(socket, addr, 0,
			(char*)p->getData(), &len);

	if (status != APR_SUCCESS)
	{
		throw IOException(status);
	}
}