i2pd/SSU.cpp

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#include <boost/bind.hpp>
#include "Log.h"
#include "hmac.h"
#include "SSU.h"
namespace i2p
{
namespace ssu
{
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SSUSession::SSUSession (): m_State (eSessionStateUnknown)
{
}
void SSUSession::ProcessNextMessage (uint8_t * buf, std::size_t len)
{
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switch (m_State)
{
default:
LogPrint ("SSU state not implemented yet");
}
}
void SSUSession::Authenticate (uint8_t * buf, size_t len, uint8_t * aesKey, uint8_t * iv, uint8_t * macKey)
{
m_Encryption.SetKeyWithIV (aesKey, 32, iv);
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}
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SSUServer::SSUServer (boost::asio::io_service& service, int port):
m_Socket (service, boost::asio::ip::udp::v4 (), port)
{
}
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SSUServer::~SSUServer ()
{
for (auto it: m_Sessions)
delete it.second;
}
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void SSUServer::Start ()
{
Receive ();
}
void SSUServer::Stop ()
{
m_Socket.close ();
}
void SSUServer::Receive ()
{
m_Socket.async_receive_from (boost::asio::buffer (m_ReceiveBuffer, SSU_MTU), m_SenderEndpoint,
boost::bind (&SSUServer::HandleReceivedFrom, this, boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred));
}
void SSUServer::HandleReceivedFrom (const boost::system::error_code& ecode, std::size_t bytes_transferred)
{
if (!ecode)
{
LogPrint ("SSU received ", bytes_transferred, " bytes");
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SSUSession * session = nullptr;
auto it = m_Sessions.find (m_SenderEndpoint);
if (it != m_Sessions.end ())
session = it->second;
if (session)
{
session = new SSUSession ();
m_Sessions[m_SenderEndpoint] = session;
LogPrint ("New SSU session from ", m_SenderEndpoint.address ().to_string (), ":", m_SenderEndpoint.port (), " created");
}
session->ProcessNextMessage (m_ReceiveBuffer, bytes_transferred);
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Receive ();
}
else
LogPrint ("SSU receive error: ", ecode.message ());
}
}
}