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/*
* JsonRpc-Cpp - JSON-RPC implementation.
* Copyright (C) 2008-2011 Sebastien Vincent <sebastien.vincent@cppextrem.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* \file jsonrpc_udpserver.cpp
* \brief JSON-RPC UDP server.
* \author Sebastien Vincent
*/
#include <iostream>
#include <stdexcept>
#include "jsonrpc_udpserver.h"
#include "netstring.h"
namespace Json
{
namespace Rpc
{
UdpServer::UdpServer(const std::string& address, uint16_t port) : Server(address, port)
{
m_protocol = networking::UDP;
}
UdpServer::~UdpServer()
{
}
ssize_t UdpServer::Send(const std::string& data, const struct sockaddr* addr,
socklen_t addrlen)
{
std::string rep = data;
/* encoding if any */
if(GetEncapsulatedFormat() == Json::Rpc::NETSTRING)
{
rep = netstring::encode(rep);
}
return ::sendto(m_sock, rep.c_str(), rep.length(), 0, (struct sockaddr*)addr, addrlen);
}
bool UdpServer::Recv(int fd)
{
Json::Value response;
ssize_t nb = -1;
char buf[1500];
struct sockaddr_storage addr;
socklen_t addrlen = sizeof(struct sockaddr_storage);
nb = ::recvfrom(fd, buf, sizeof(buf), 0, (struct sockaddr*)&addr, &addrlen);
if(nb > 0)
{
std::string msg = std::string(buf, nb);
if(GetEncapsulatedFormat() == Json::Rpc::NETSTRING)
{
try
{
msg = netstring::decode(msg);
}
catch(const netstring::NetstringException& e)
{
/* error parsing NetString */
std::cerr << e.what() << std::endl;
return false;
}
}
/* give the message to JsonHandler */
m_jsonHandler.Process(msg, response);
/* in case of notification message received, the response could be Json::Value::null */
if(response != Json::Value::null)
{
Send(m_jsonHandler.GetString(response),(struct sockaddr*)&addr, addrlen);
}
return true;
}
return false;
}
void UdpServer::WaitMessage(uint32_t ms)
{
fd_set fdsr;
struct timeval tv;
int max_sock = m_sock;
max_sock++;
FD_ZERO(&fdsr);
#ifdef _WIN32
/* on Windows, a socket is not an int but a SOCKET (unsigned int) */
FD_SET((SOCKET)m_sock, &fdsr);
#else
FD_SET(m_sock, &fdsr);
#endif
tv.tv_sec = ms / 1000;
tv.tv_usec = (ms % 1000) * 1000;
if(select(max_sock, &fdsr, NULL, NULL, ms ? &tv : NULL) > 0)
{
if(FD_ISSET(m_sock, &fdsr))
{
Recv(m_sock);
}
}
else
{
/* problem */
}
}
} /* namespace Rpc */
} /* namespace Json */
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