I2P: End-to-End encrypted and anonymous Internet https://i2pd.website/
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#include "Destination.h"
#include "Identity.h"
#include "ClientContext.h"
#include "I2PService.h"
namespace i2p
{
namespace client
{
static const i2p::data::SigningKeyType I2P_SERVICE_DEFAULT_KEY_TYPE = i2p::data::SIGNING_KEY_TYPE_ECDSA_SHA256_P256;
I2PService::I2PService (std::shared_ptr<ClientDestination> localDestination):
m_LocalDestination (localDestination ? localDestination :
i2p::client::context.CreateNewLocalDestination (false, I2P_SERVICE_DEFAULT_KEY_TYPE))
{
}
I2PService::I2PService (i2p::data::SigningKeyType kt):
m_LocalDestination (i2p::client::context.CreateNewLocalDestination (false, kt))
{
}
void I2PService::CreateStream (StreamRequestComplete streamRequestComplete, const std::string& dest, int port) {
assert(streamRequestComplete);
i2p::data::IdentHash identHash;
if (i2p::client::context.GetAddressBook ().GetIdentHash (dest, identHash))
m_LocalDestination->CreateStream (streamRequestComplete, identHash, port);
else
{
LogPrint (eLogWarning, "I2PService: Remote destination ", dest, " not found");
streamRequestComplete (nullptr);
}
}
TCPIPPipe::TCPIPPipe(I2PService * owner, std::shared_ptr<boost::asio::ip::tcp::socket> upstream, std::shared_ptr<boost::asio::ip::tcp::socket> downstream) : I2PServiceHandler(owner), m_up(upstream), m_down(downstream) {}
TCPIPPipe::~TCPIPPipe()
{
Terminate();
}
void TCPIPPipe::Start()
{
AsyncReceiveUpstream();
AsyncReceiveDownstream();
}
void TCPIPPipe::Terminate()
{
if(Kill()) return;
Done(shared_from_this());
if (m_up) {
if (m_up->is_open()) {
m_up->close();
}
m_up = nullptr;
}
if (m_down) {
if (m_down->is_open()) {
m_down->close();
}
m_down = nullptr;
}
}
void TCPIPPipe::AsyncReceiveUpstream()
{
if (m_up) {
m_up->async_read_some(boost::asio::buffer(m_upstream_to_down_buf, TCP_IP_PIPE_BUFFER_SIZE),
std::bind(&TCPIPPipe::HandleUpstreamReceived, shared_from_this(),
std::placeholders::_1, std::placeholders::_2));
} else {
LogPrint(eLogError, "TCPIPPipe: upstream receive: no socket");
}
}
void TCPIPPipe::AsyncReceiveDownstream()
{
if (m_down) {
m_down->async_read_some(boost::asio::buffer(m_downstream_to_up_buf, TCP_IP_PIPE_BUFFER_SIZE),
std::bind(&TCPIPPipe::HandleDownstreamReceived, shared_from_this(),
std::placeholders::_1, std::placeholders::_2));
} else {
LogPrint(eLogError, "TCPIPPipe: downstream receive: no socket");
}
}
void TCPIPPipe::UpstreamWrite(const uint8_t * buf, size_t len)
{
if (m_up) {
LogPrint(eLogDebug, "TCPIPPipe: upstream: ", (int) len, " bytes written");
boost::asio::async_write(*m_up, boost::asio::buffer(buf, len),
boost::asio::transfer_all(),
std::bind(&TCPIPPipe::HandleUpstreamWrite,
shared_from_this(),
std::placeholders::_1)
);
} else {
LogPrint(eLogError, "TCPIPPipe: upstream write: no socket");
}
}
void TCPIPPipe::DownstreamWrite(const uint8_t * buf, size_t len)
{
if (m_down) {
LogPrint(eLogDebug, "TCPIPPipe: downstream: ", (int) len, " bytes written");
boost::asio::async_write(*m_down, boost::asio::buffer(buf, len),
boost::asio::transfer_all(),
std::bind(&TCPIPPipe::HandleDownstreamWrite,
shared_from_this(),
std::placeholders::_1)
);
} else {
LogPrint(eLogError, "TCPIPPipe: downstream write: no socket");
}
}
void TCPIPPipe::HandleDownstreamReceived(const boost::system::error_code & ecode, std::size_t bytes_transfered)
{
LogPrint(eLogDebug, "TCPIPPipe: downstream: ", (int) bytes_transfered, " bytes received");
if (ecode) {
LogPrint(eLogError, "TCPIPPipe: downstream read error:" , ecode.message());
if (ecode != boost::asio::error::operation_aborted)
Terminate();
} else {
if (bytes_transfered > 0 ) {
memcpy(m_upstream_buf, m_downstream_to_up_buf, bytes_transfered);
UpstreamWrite(m_upstream_buf, bytes_transfered);
}
AsyncReceiveDownstream();
}
}
void TCPIPPipe::HandleDownstreamWrite(const boost::system::error_code & ecode) {
if (ecode) {
LogPrint(eLogError, "TCPIPPipe: downstream write error:" , ecode.message());
if (ecode != boost::asio::error::operation_aborted)
Terminate();
}
}
void TCPIPPipe::HandleUpstreamWrite(const boost::system::error_code & ecode) {
if (ecode) {
LogPrint(eLogError, "TCPIPPipe: upstream write error:" , ecode.message());
if (ecode != boost::asio::error::operation_aborted)
Terminate();
}
}
void TCPIPPipe::HandleUpstreamReceived(const boost::system::error_code & ecode, std::size_t bytes_transfered)
{
LogPrint(eLogDebug, "TCPIPPipe: upstream ", (int)bytes_transfered, " bytes received");
if (ecode) {
LogPrint(eLogError, "TCPIPPipe: upstream read error:" , ecode.message());
if (ecode != boost::asio::error::operation_aborted)
Terminate();
} else {
if (bytes_transfered > 0 ) {
memcpy(m_upstream_buf, m_upstream_to_down_buf, bytes_transfered);
DownstreamWrite(m_upstream_buf, bytes_transfered);
}
AsyncReceiveUpstream();
}
}
void TCPIPAcceptor::Start ()
{
m_Acceptor.listen ();
Accept ();
}
void TCPIPAcceptor::Stop ()
{
m_Acceptor.close();
m_Timer.cancel ();
ClearHandlers();
}
void TCPIPAcceptor::Accept ()
{
auto newSocket = std::make_shared<boost::asio::ip::tcp::socket> (GetService ());
m_Acceptor.async_accept (*newSocket, std::bind (&TCPIPAcceptor::HandleAccept, this,
std::placeholders::_1, newSocket));
}
void TCPIPAcceptor::HandleAccept (const boost::system::error_code& ecode, std::shared_ptr<boost::asio::ip::tcp::socket> socket)
{
if (!ecode)
{
LogPrint(eLogDebug, "I2PService: ", GetName(), " accepted");
auto handler = CreateHandler(socket);
if (handler)
{
AddHandler(handler);
handler->Handle();
}
else
socket->close();
Accept();
}
else
{
if (ecode != boost::asio::error::operation_aborted)
LogPrint (eLogError, "I2PService: ", GetName(), " closing socket on accept because: ", ecode.message ());
}
}
}
}