mirror of https://github.com/PurpleI2P/i2pd.git
I2P: End-to-End encrypted and anonymous Internet
https://i2pd.website/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
897 lines
26 KiB
897 lines
26 KiB
/* |
|
* Copyright (c) 2013-2023, The PurpleI2P Project |
|
* |
|
* This file is part of Purple i2pd project and licensed under BSD3 |
|
* |
|
* See full license text in LICENSE file at top of project tree |
|
*/ |
|
|
|
#include <cassert> |
|
#include <boost/algorithm/string.hpp> |
|
#include "Base.h" |
|
#include "Log.h" |
|
#include "Destination.h" |
|
#include "ClientContext.h" |
|
#include "I2PTunnel.h" |
|
#include "util.h" |
|
|
|
namespace i2p |
|
{ |
|
namespace client |
|
{ |
|
|
|
/** set standard socket options */ |
|
static void I2PTunnelSetSocketOptions (std::shared_ptr<boost::asio::ip::tcp::socket> socket) |
|
{ |
|
if (socket && socket->is_open()) |
|
{ |
|
boost::asio::socket_base::receive_buffer_size option(I2P_TUNNEL_CONNECTION_BUFFER_SIZE); |
|
socket->set_option(option); |
|
} |
|
} |
|
|
|
I2PTunnelConnection::I2PTunnelConnection (I2PService * owner, std::shared_ptr<boost::asio::ip::tcp::socket> socket, |
|
std::shared_ptr<const i2p::data::LeaseSet> leaseSet, int port): |
|
I2PServiceHandler(owner), m_Socket (socket), m_RemoteEndpoint (socket->remote_endpoint ()), |
|
m_IsQuiet (true) |
|
{ |
|
m_Stream = GetOwner()->GetLocalDestination ()->CreateStream (leaseSet, port); |
|
} |
|
|
|
I2PTunnelConnection::I2PTunnelConnection (I2PService * owner, |
|
std::shared_ptr<boost::asio::ip::tcp::socket> socket, std::shared_ptr<i2p::stream::Stream> stream): |
|
I2PServiceHandler(owner), m_Socket (socket), m_Stream (stream), |
|
m_RemoteEndpoint (socket->remote_endpoint ()), m_IsQuiet (true) |
|
{ |
|
} |
|
|
|
I2PTunnelConnection::I2PTunnelConnection (I2PService * owner, std::shared_ptr<i2p::stream::Stream> stream, |
|
const boost::asio::ip::tcp::endpoint& target, bool quiet, |
|
std::shared_ptr<boost::asio::ssl::context> sslCtx): |
|
I2PServiceHandler(owner), m_Stream (stream), m_RemoteEndpoint (target), m_IsQuiet (quiet) |
|
{ |
|
m_Socket = std::make_shared<boost::asio::ip::tcp::socket> (owner->GetService ()); |
|
if (sslCtx) |
|
m_SSL = std::make_shared<boost::asio::ssl::stream<boost::asio::ip::tcp::socket&> > (*m_Socket, *sslCtx); |
|
} |
|
|
|
I2PTunnelConnection::~I2PTunnelConnection () |
|
{ |
|
} |
|
|
|
void I2PTunnelConnection::I2PConnect (const uint8_t * msg, size_t len) |
|
{ |
|
if (m_Stream) |
|
{ |
|
if (msg) |
|
m_Stream->Send (msg, len); // connect and send |
|
else |
|
m_Stream->Send (m_Buffer, 0); // connect |
|
} |
|
StreamReceive (); |
|
Receive (); |
|
} |
|
|
|
boost::asio::ip::address GetLoopbackAddressFor(const i2p::data::IdentHash & addr) |
|
{ |
|
boost::asio::ip::address_v4::bytes_type bytes; |
|
const uint8_t * ident = addr; |
|
bytes[0] = 127; |
|
memcpy (bytes.data ()+1, ident, 3); |
|
boost::asio::ip::address ourIP = boost::asio::ip::address_v4 (bytes); |
|
return ourIP; |
|
} |
|
|
|
#ifdef __linux__ |
|
static void MapToLoopback(std::shared_ptr<boost::asio::ip::tcp::socket> sock, const i2p::data::IdentHash & addr) |
|
{ |
|
if (sock) |
|
{ |
|
// bind to 127.x.x.x address |
|
// where x.x.x are first three bytes from ident |
|
auto ourIP = GetLoopbackAddressFor(addr); |
|
boost::system::error_code ec; |
|
sock->bind (boost::asio::ip::tcp::endpoint (ourIP, 0), ec); |
|
if (ec) |
|
LogPrint (eLogError, "I2PTunnel: Can't bind ourIP to ", ourIP.to_string (), ": ", ec.message ()); |
|
} |
|
} |
|
#endif |
|
|
|
void I2PTunnelConnection::Connect (bool isUniqueLocal) |
|
{ |
|
if (m_Socket) |
|
{ |
|
I2PTunnelSetSocketOptions (m_Socket); |
|
#ifdef __linux__ |
|
if (isUniqueLocal && m_RemoteEndpoint.address ().is_v4 () && |
|
m_RemoteEndpoint.address ().to_v4 ().to_bytes ()[0] == 127) |
|
{ |
|
m_Socket->open (boost::asio::ip::tcp::v4 ()); |
|
auto ident = m_Stream->GetRemoteIdentity()->GetIdentHash(); |
|
MapToLoopback(m_Socket, ident); |
|
} |
|
#endif |
|
m_Socket->async_connect (m_RemoteEndpoint, std::bind (&I2PTunnelConnection::HandleConnect, |
|
shared_from_this (), std::placeholders::_1)); |
|
} |
|
} |
|
|
|
void I2PTunnelConnection::Connect (const boost::asio::ip::address& localAddress) |
|
{ |
|
if (m_Socket) |
|
{ |
|
if (m_RemoteEndpoint.address().is_v6 ()) |
|
m_Socket->open (boost::asio::ip::tcp::v6 ()); |
|
else |
|
m_Socket->open (boost::asio::ip::tcp::v4 ()); |
|
boost::system::error_code ec; |
|
m_Socket->bind (boost::asio::ip::tcp::endpoint (localAddress, 0), ec); |
|
if (ec) |
|
LogPrint (eLogError, "I2PTunnel: Can't bind to ", localAddress.to_string (), ": ", ec.message ()); |
|
} |
|
Connect (false); |
|
} |
|
|
|
void I2PTunnelConnection::Terminate () |
|
{ |
|
if (Kill()) return; |
|
if (m_SSL) m_SSL = nullptr; |
|
if (m_Stream) |
|
{ |
|
m_Stream->Close (); |
|
m_Stream.reset (); |
|
} |
|
boost::system::error_code ec; |
|
m_Socket->shutdown(boost::asio::ip::tcp::socket::shutdown_send, ec); // avoid RST |
|
m_Socket->close (); |
|
|
|
Done(shared_from_this ()); |
|
} |
|
|
|
void I2PTunnelConnection::Receive () |
|
{ |
|
if (m_SSL) |
|
m_SSL->async_read_some (boost::asio::buffer(m_Buffer, I2P_TUNNEL_CONNECTION_BUFFER_SIZE), |
|
std::bind(&I2PTunnelConnection::HandleReceive, shared_from_this (), |
|
std::placeholders::_1, std::placeholders::_2)); |
|
else |
|
m_Socket->async_read_some (boost::asio::buffer(m_Buffer, I2P_TUNNEL_CONNECTION_BUFFER_SIZE), |
|
std::bind(&I2PTunnelConnection::HandleReceive, shared_from_this (), |
|
std::placeholders::_1, std::placeholders::_2)); |
|
} |
|
|
|
void I2PTunnelConnection::HandleReceive (const boost::system::error_code& ecode, std::size_t bytes_transferred) |
|
{ |
|
if (ecode) |
|
{ |
|
if (ecode != boost::asio::error::operation_aborted) |
|
{ |
|
LogPrint (eLogError, "I2PTunnel: Read error: ", ecode.message ()); |
|
Terminate (); |
|
} |
|
} |
|
else |
|
WriteToStream (m_Buffer, bytes_transferred); |
|
} |
|
|
|
void I2PTunnelConnection::WriteToStream (const uint8_t * buf, size_t len) |
|
{ |
|
if (m_Stream) |
|
{ |
|
auto s = shared_from_this (); |
|
m_Stream->AsyncSend (buf, len, |
|
[s](const boost::system::error_code& ecode) |
|
{ |
|
if (!ecode) |
|
s->Receive (); |
|
else |
|
s->Terminate (); |
|
}); |
|
} |
|
} |
|
|
|
void I2PTunnelConnection::HandleWrite (const boost::system::error_code& ecode) |
|
{ |
|
if (ecode) |
|
{ |
|
LogPrint (eLogError, "I2PTunnel: Write error: ", ecode.message ()); |
|
if (ecode != boost::asio::error::operation_aborted) |
|
Terminate (); |
|
} |
|
else |
|
StreamReceive (); |
|
} |
|
|
|
void I2PTunnelConnection::StreamReceive () |
|
{ |
|
if (m_Stream) |
|
{ |
|
if (m_Stream->GetStatus () == i2p::stream::eStreamStatusNew || |
|
m_Stream->GetStatus () == i2p::stream::eStreamStatusOpen) // regular |
|
{ |
|
m_Stream->AsyncReceive (boost::asio::buffer (m_StreamBuffer, I2P_TUNNEL_CONNECTION_BUFFER_SIZE), |
|
std::bind (&I2PTunnelConnection::HandleStreamReceive, shared_from_this (), |
|
std::placeholders::_1, std::placeholders::_2), |
|
I2P_TUNNEL_CONNECTION_MAX_IDLE); |
|
} |
|
else // closed by peer |
|
{ |
|
// get remaining data |
|
auto len = m_Stream->ReadSome (m_StreamBuffer, I2P_TUNNEL_CONNECTION_BUFFER_SIZE); |
|
if (len > 0) // still some data |
|
Write (m_StreamBuffer, len); |
|
else // no more data |
|
Terminate (); |
|
} |
|
} |
|
} |
|
|
|
void I2PTunnelConnection::HandleStreamReceive (const boost::system::error_code& ecode, std::size_t bytes_transferred) |
|
{ |
|
if (ecode) |
|
{ |
|
if (ecode != boost::asio::error::operation_aborted) |
|
{ |
|
LogPrint (eLogError, "I2PTunnel: Stream read error: ", ecode.message ()); |
|
if (bytes_transferred > 0) |
|
Write (m_StreamBuffer, bytes_transferred); // postpone termination |
|
else if (ecode == boost::asio::error::timed_out && m_Stream && m_Stream->IsOpen ()) |
|
StreamReceive (); |
|
else |
|
Terminate (); |
|
} |
|
else |
|
Terminate (); |
|
} |
|
else |
|
Write (m_StreamBuffer, bytes_transferred); |
|
} |
|
|
|
void I2PTunnelConnection::Write (const uint8_t * buf, size_t len) |
|
{ |
|
if (m_SSL) |
|
boost::asio::async_write (*m_SSL, boost::asio::buffer (buf, len), boost::asio::transfer_all (), |
|
std::bind (&I2PTunnelConnection::HandleWrite, shared_from_this (), std::placeholders::_1)); |
|
else |
|
boost::asio::async_write (*m_Socket, boost::asio::buffer (buf, len), boost::asio::transfer_all (), |
|
std::bind (&I2PTunnelConnection::HandleWrite, shared_from_this (), std::placeholders::_1)); |
|
} |
|
|
|
void I2PTunnelConnection::HandleConnect (const boost::system::error_code& ecode) |
|
{ |
|
if (ecode) |
|
{ |
|
LogPrint (eLogError, "I2PTunnel: Connect error: ", ecode.message ()); |
|
Terminate (); |
|
} |
|
else |
|
{ |
|
LogPrint (eLogDebug, "I2PTunnel: Connected"); |
|
if (m_SSL) |
|
m_SSL->async_handshake (boost::asio::ssl::stream_base::client, |
|
std::bind (&I2PTunnelConnection::HandleHandshake, shared_from_this (), std::placeholders::_1)); |
|
else |
|
Established (); |
|
} |
|
} |
|
|
|
void I2PTunnelConnection::HandleHandshake (const boost::system::error_code& ecode) |
|
{ |
|
if (ecode) |
|
{ |
|
LogPrint (eLogError, "I2PTunnel: Handshake error: ", ecode.message ()); |
|
Terminate (); |
|
} |
|
else |
|
{ |
|
LogPrint (eLogDebug, "I2PTunnel: SSL connected"); |
|
Established (); |
|
} |
|
} |
|
|
|
void I2PTunnelConnection::Established () |
|
{ |
|
if (m_IsQuiet) |
|
StreamReceive (); |
|
else |
|
{ |
|
// send destination first like received from I2P |
|
std::string dest = m_Stream->GetRemoteIdentity ()->ToBase64 (); |
|
dest += "\n"; |
|
if(sizeof(m_StreamBuffer) >= dest.size()) { |
|
memcpy (m_StreamBuffer, dest.c_str (), dest.size ()); |
|
} |
|
HandleStreamReceive (boost::system::error_code (), dest.size ()); |
|
} |
|
Receive (); |
|
} |
|
|
|
void I2PClientTunnelConnectionHTTP::Write (const uint8_t * buf, size_t len) |
|
{ |
|
if (m_HeaderSent) |
|
I2PTunnelConnection::Write (buf, len); |
|
else |
|
{ |
|
m_InHeader.clear (); |
|
m_InHeader.write ((const char *)buf, len); |
|
std::string line; |
|
bool endOfHeader = false; |
|
while (!endOfHeader) |
|
{ |
|
std::getline(m_InHeader, line); |
|
if (!m_InHeader.fail ()) |
|
{ |
|
if (line == "\r") endOfHeader = true; |
|
else |
|
{ |
|
if (!m_ConnectionSent && !line.compare(0, 10, "Connection")) |
|
{ |
|
/* close connection, if not Connection: (U|u)pgrade (for websocket) */ |
|
auto x = line.find("pgrade"); |
|
if (x != std::string::npos && std::tolower(line[x - 1]) == 'u') |
|
m_OutHeader << line << "\r\n"; |
|
else |
|
m_OutHeader << "Connection: close\r\n"; |
|
|
|
m_ConnectionSent = true; |
|
} |
|
else if (!m_ProxyConnectionSent && !line.compare(0, 16, "Proxy-Connection")) |
|
{ |
|
m_OutHeader << "Proxy-Connection: close\r\n"; |
|
m_ProxyConnectionSent = true; |
|
} |
|
else |
|
m_OutHeader << line << "\n"; |
|
} |
|
} |
|
else |
|
{ |
|
// insert incomplete line back |
|
m_InHeader.clear (); |
|
m_InHeader << line; |
|
break; |
|
} |
|
} |
|
|
|
if (endOfHeader) |
|
{ |
|
if (!m_ConnectionSent) m_OutHeader << "Connection: close\r\n"; |
|
if (!m_ProxyConnectionSent) m_OutHeader << "Proxy-Connection: close\r\n"; |
|
m_OutHeader << "\r\n"; // end of header |
|
m_OutHeader << m_InHeader.str ().substr (m_InHeader.tellg ()); // data right after header |
|
m_InHeader.str (""); |
|
m_HeaderSent = true; |
|
I2PTunnelConnection::Write ((uint8_t *)m_OutHeader.str ().c_str (), m_OutHeader.str ().length ()); |
|
} |
|
else if (m_OutHeader.tellp () < I2P_TUNNEL_HTTP_MAX_HEADER_SIZE) |
|
StreamReceive (); // read more header |
|
else |
|
{ |
|
LogPrint (eLogError, "I2PTunnel: HTTP header exceeds max size ", I2P_TUNNEL_HTTP_MAX_HEADER_SIZE); |
|
Terminate (); |
|
} |
|
} |
|
} |
|
|
|
I2PServerTunnelConnectionHTTP::I2PServerTunnelConnectionHTTP (I2PService * owner, std::shared_ptr<i2p::stream::Stream> stream, |
|
const boost::asio::ip::tcp::endpoint& target, const std::string& host, |
|
std::shared_ptr<boost::asio::ssl::context> sslCtx): |
|
I2PTunnelConnection (owner, stream, target, true, sslCtx), m_Host (host), |
|
m_HeaderSent (false), m_ResponseHeaderSent (false), m_From (stream->GetRemoteIdentity ()) |
|
{ |
|
if (sslCtx) |
|
SSL_set_tlsext_host_name(GetSSL ()->native_handle(), host.c_str ()); |
|
} |
|
|
|
void I2PServerTunnelConnectionHTTP::Write (const uint8_t * buf, size_t len) |
|
{ |
|
if (m_HeaderSent) |
|
I2PTunnelConnection::Write (buf, len); |
|
else |
|
{ |
|
m_InHeader.clear (); |
|
m_InHeader.write ((const char *)buf, len); |
|
std::string line; |
|
bool endOfHeader = false, connection = false; |
|
while (!endOfHeader) |
|
{ |
|
std::getline(m_InHeader, line); |
|
if (!m_InHeader.fail ()) |
|
{ |
|
if (line == "\r") endOfHeader = true; |
|
else |
|
{ |
|
// strip up some headers |
|
static const std::vector<std::string> excluded // list of excluded headers |
|
{ |
|
"Keep-Alive:", "X-I2P" |
|
}; |
|
bool matched = false; |
|
for (const auto& it: excluded) |
|
if (boost::iequals (line.substr (0, it.length ()), it)) |
|
{ |
|
matched = true; |
|
break; |
|
} |
|
if (matched) continue; |
|
|
|
// replace some headers |
|
if (!m_Host.empty () && boost::iequals (line.substr (0, 5), "Host:")) |
|
m_OutHeader << "Host: " << m_Host << "\r\n"; // override host |
|
else if (boost::iequals (line.substr (0, 11), "Connection:")) |
|
{ |
|
auto x = line.find("pgrade"); |
|
if (x != std::string::npos && x && std::tolower(line[x - 1]) != 'u') // upgrade or Upgrade |
|
m_OutHeader << line << "\n"; |
|
else |
|
m_OutHeader << "Connection: close\r\n"; |
|
connection = true; |
|
} |
|
else // forward as is |
|
m_OutHeader << line << "\n"; |
|
} |
|
} |
|
else |
|
{ |
|
// insert incomplete line back |
|
m_InHeader.clear (); |
|
m_InHeader << line; |
|
break; |
|
} |
|
} |
|
|
|
if (endOfHeader) |
|
{ |
|
// add Connection if not presented |
|
if (!connection) |
|
m_OutHeader << "Connection: close\r\n"; |
|
// add X-I2P fields |
|
if (m_From) |
|
{ |
|
m_OutHeader << X_I2P_DEST_B32 << ": " << context.GetAddressBook ().ToAddress(m_From->GetIdentHash ()) << "\r\n"; |
|
m_OutHeader << X_I2P_DEST_HASH << ": " << m_From->GetIdentHash ().ToBase64 () << "\r\n"; |
|
m_OutHeader << X_I2P_DEST_B64 << ": " << m_From->ToBase64 () << "\r\n"; |
|
} |
|
|
|
m_OutHeader << "\r\n"; // end of header |
|
m_OutHeader << m_InHeader.str ().substr (m_InHeader.tellg ()); // data right after header |
|
m_InHeader.str (""); |
|
m_From = nullptr; |
|
m_HeaderSent = true; |
|
I2PTunnelConnection::Write ((uint8_t *)m_OutHeader.str ().c_str (), m_OutHeader.str ().length ()); |
|
} |
|
else if (m_OutHeader.tellp () < I2P_TUNNEL_HTTP_MAX_HEADER_SIZE) |
|
StreamReceive (); // read more header |
|
else |
|
{ |
|
LogPrint (eLogError, "I2PTunnel: HTTP header exceeds max size ", I2P_TUNNEL_HTTP_MAX_HEADER_SIZE); |
|
Terminate (); |
|
} |
|
} |
|
} |
|
|
|
void I2PServerTunnelConnectionHTTP::WriteToStream (const uint8_t * buf, size_t len) |
|
{ |
|
if (m_ResponseHeaderSent) |
|
I2PTunnelConnection::WriteToStream (buf, len); |
|
else |
|
{ |
|
m_InHeader.clear (); |
|
if (m_InHeader.str ().empty ()) m_OutHeader.str (""); // start of response |
|
m_InHeader.write ((const char *)buf, len); |
|
std::string line; |
|
bool endOfHeader = false; |
|
while (!endOfHeader) |
|
{ |
|
std::getline(m_InHeader, line); |
|
if (!m_InHeader.fail ()) |
|
{ |
|
if (line == "\r") endOfHeader = true; |
|
else |
|
{ |
|
static const std::vector<std::string> excluded // list of excluded headers |
|
{ |
|
"Server:", "Date:", "X-Runtime:", "X-Powered-By:", "Proxy" |
|
}; |
|
bool matched = false; |
|
for (const auto& it: excluded) |
|
if (!line.compare(0, it.length (), it)) |
|
{ |
|
matched = true; |
|
break; |
|
} |
|
if (!matched) |
|
m_OutHeader << line << "\n"; |
|
} |
|
} |
|
else |
|
{ |
|
// insert incomplete line back |
|
m_InHeader.clear (); |
|
m_InHeader << line; |
|
break; |
|
} |
|
} |
|
|
|
if (endOfHeader) |
|
{ |
|
m_OutHeader << "\r\n"; // end of header |
|
m_OutHeader << m_InHeader.str ().substr (m_InHeader.tellg ()); // data right after header |
|
m_InHeader.str (""); |
|
m_ResponseHeaderSent = true; |
|
I2PTunnelConnection::WriteToStream ((uint8_t *)m_OutHeader.str ().c_str (), m_OutHeader.str ().length ()); |
|
m_OutHeader.str (""); |
|
} |
|
else |
|
Receive (); |
|
} |
|
} |
|
|
|
I2PTunnelConnectionIRC::I2PTunnelConnectionIRC (I2PService * owner, std::shared_ptr<i2p::stream::Stream> stream, |
|
const boost::asio::ip::tcp::endpoint& target, const std::string& webircpass, |
|
std::shared_ptr<boost::asio::ssl::context> sslCtx): |
|
I2PTunnelConnection (owner, stream, target, true, sslCtx), m_From (stream->GetRemoteIdentity ()), |
|
m_NeedsWebIrc (webircpass.length() ? true : false), m_WebircPass (webircpass) |
|
{ |
|
} |
|
|
|
void I2PTunnelConnectionIRC::Write (const uint8_t * buf, size_t len) |
|
{ |
|
m_OutPacket.str (""); |
|
if (m_NeedsWebIrc) |
|
{ |
|
m_NeedsWebIrc = false; |
|
m_OutPacket << "WEBIRC " << m_WebircPass << " cgiirc " << context.GetAddressBook ().ToAddress (m_From->GetIdentHash ()) |
|
<< " " << GetSocket ()->local_endpoint ().address () << std::endl; |
|
} |
|
|
|
m_InPacket.clear (); |
|
m_InPacket.write ((const char *)buf, len); |
|
|
|
while (!m_InPacket.eof () && !m_InPacket.fail ()) |
|
{ |
|
std::string line; |
|
std::getline (m_InPacket, line); |
|
if (line.length () == 0 && m_InPacket.eof ()) |
|
m_InPacket.str (""); |
|
auto pos = line.find ("USER"); |
|
if (!pos) // start of line |
|
{ |
|
pos = line.find (" "); |
|
pos++; |
|
pos = line.find (" ", pos); |
|
pos++; |
|
auto nextpos = line.find (" ", pos); |
|
m_OutPacket << line.substr (0, pos); |
|
m_OutPacket << context.GetAddressBook ().ToAddress (m_From->GetIdentHash ()); |
|
m_OutPacket << line.substr (nextpos) << '\n'; |
|
} |
|
else |
|
m_OutPacket << line << '\n'; |
|
} |
|
I2PTunnelConnection::Write ((uint8_t *)m_OutPacket.str ().c_str (), m_OutPacket.str ().length ()); |
|
} |
|
|
|
|
|
/* This handler tries to establish a connection with the desired server and dies if it fails to do so */ |
|
class I2PClientTunnelHandler: public I2PServiceHandler, public std::enable_shared_from_this<I2PClientTunnelHandler> |
|
{ |
|
public: |
|
I2PClientTunnelHandler (I2PClientTunnel * parent, std::shared_ptr<const Address> address, |
|
int destinationPort, std::shared_ptr<boost::asio::ip::tcp::socket> socket): |
|
I2PServiceHandler(parent), m_Address(address), |
|
m_DestinationPort (destinationPort), m_Socket(socket) {}; |
|
void Handle(); |
|
void Terminate(); |
|
private: |
|
void HandleStreamRequestComplete (std::shared_ptr<i2p::stream::Stream> stream); |
|
std::shared_ptr<const Address> m_Address; |
|
int m_DestinationPort; |
|
std::shared_ptr<boost::asio::ip::tcp::socket> m_Socket; |
|
}; |
|
|
|
void I2PClientTunnelHandler::Handle() |
|
{ |
|
GetOwner()->CreateStream ( |
|
std::bind (&I2PClientTunnelHandler::HandleStreamRequestComplete, shared_from_this(), std::placeholders::_1), |
|
m_Address, m_DestinationPort); |
|
} |
|
|
|
void I2PClientTunnelHandler::HandleStreamRequestComplete (std::shared_ptr<i2p::stream::Stream> stream) |
|
{ |
|
if (stream) |
|
{ |
|
if (Kill()) return; |
|
LogPrint (eLogDebug, "I2PTunnel: New connection"); |
|
auto connection = std::make_shared<I2PTunnelConnection>(GetOwner(), m_Socket, stream); |
|
GetOwner()->AddHandler (connection); |
|
connection->I2PConnect (); |
|
Done(shared_from_this()); |
|
} |
|
else |
|
{ |
|
LogPrint (eLogError, "I2PTunnel: Client Tunnel Issue when creating the stream, check the previous warnings for more info."); |
|
Terminate(); |
|
} |
|
} |
|
|
|
void I2PClientTunnelHandler::Terminate() |
|
{ |
|
if (Kill()) return; |
|
if (m_Socket) |
|
{ |
|
m_Socket->close(); |
|
m_Socket = nullptr; |
|
} |
|
Done(shared_from_this()); |
|
} |
|
|
|
I2PClientTunnel::I2PClientTunnel (const std::string& name, const std::string& destination, |
|
const std::string& address, int port, std::shared_ptr<ClientDestination> localDestination, int destinationPort): |
|
TCPIPAcceptor (address, port, localDestination), m_Name (name), m_Destination (destination), |
|
m_DestinationPort (destinationPort), m_KeepAliveInterval (0) |
|
{ |
|
} |
|
|
|
void I2PClientTunnel::Start () |
|
{ |
|
TCPIPAcceptor::Start (); |
|
GetAddress (); |
|
if (m_KeepAliveInterval) |
|
ScheduleKeepAliveTimer (); |
|
} |
|
|
|
void I2PClientTunnel::Stop () |
|
{ |
|
TCPIPAcceptor::Stop(); |
|
m_Address = nullptr; |
|
if (m_KeepAliveTimer) m_KeepAliveTimer->cancel (); |
|
} |
|
|
|
void I2PClientTunnel::SetKeepAliveInterval (uint32_t keepAliveInterval) |
|
{ |
|
m_KeepAliveInterval = keepAliveInterval; |
|
if (m_KeepAliveInterval) |
|
m_KeepAliveTimer.reset (new boost::asio::deadline_timer (GetLocalDestination ()->GetService ())); |
|
} |
|
|
|
/* HACK: maybe we should create a caching IdentHash provider in AddressBook */ |
|
std::shared_ptr<const Address> I2PClientTunnel::GetAddress () |
|
{ |
|
if (!m_Address) |
|
{ |
|
m_Address = i2p::client::context.GetAddressBook ().GetAddress (m_Destination); |
|
if (!m_Address) |
|
LogPrint (eLogWarning, "I2PTunnel: Remote destination ", m_Destination, " not found"); |
|
} |
|
return m_Address; |
|
} |
|
|
|
std::shared_ptr<I2PServiceHandler> I2PClientTunnel::CreateHandler(std::shared_ptr<boost::asio::ip::tcp::socket> socket) |
|
{ |
|
auto address = GetAddress (); |
|
if (address) |
|
return std::make_shared<I2PClientTunnelHandler>(this, address, m_DestinationPort, socket); |
|
else |
|
return nullptr; |
|
} |
|
|
|
void I2PClientTunnel::ScheduleKeepAliveTimer () |
|
{ |
|
if (m_KeepAliveTimer) |
|
{ |
|
m_KeepAliveTimer->expires_from_now (boost::posix_time::seconds (m_KeepAliveInterval)); |
|
m_KeepAliveTimer->async_wait (std::bind (&I2PClientTunnel::HandleKeepAliveTimer, |
|
this, std::placeholders::_1)); |
|
} |
|
} |
|
|
|
void I2PClientTunnel::HandleKeepAliveTimer (const boost::system::error_code& ecode) |
|
{ |
|
if (ecode != boost::asio::error::operation_aborted) |
|
{ |
|
if (m_Address && m_Address->IsValid ()) |
|
{ |
|
if (m_Address->IsIdentHash ()) |
|
GetLocalDestination ()->SendPing (m_Address->identHash); |
|
else |
|
GetLocalDestination ()->SendPing (m_Address->blindedPublicKey); |
|
} |
|
ScheduleKeepAliveTimer (); |
|
} |
|
} |
|
|
|
I2PServerTunnel::I2PServerTunnel (const std::string& name, const std::string& address, |
|
int port, std::shared_ptr<ClientDestination> localDestination, int inport, bool gzip): |
|
I2PService (localDestination), m_IsUniqueLocal(true), m_Name (name), m_Address (address), m_Port (port), m_IsAccessList (false) |
|
{ |
|
if (!inport) inport = port; |
|
m_PortDestination = localDestination->GetStreamingDestination (inport); |
|
if (!m_PortDestination) // default destination |
|
m_PortDestination = localDestination->CreateStreamingDestination (inport, gzip); |
|
} |
|
|
|
void I2PServerTunnel::Start () |
|
{ |
|
m_Endpoint.port (m_Port); |
|
boost::system::error_code ec; |
|
auto addr = boost::asio::ip::address::from_string (m_Address, ec); |
|
if (!ec) |
|
{ |
|
m_Endpoint.address (addr); |
|
Accept (); |
|
} |
|
else |
|
{ |
|
auto resolver = std::make_shared<boost::asio::ip::tcp::resolver>(GetService ()); |
|
resolver->async_resolve (boost::asio::ip::tcp::resolver::query (m_Address, ""), |
|
std::bind (&I2PServerTunnel::HandleResolve, this, |
|
std::placeholders::_1, std::placeholders::_2, resolver)); |
|
} |
|
} |
|
|
|
void I2PServerTunnel::Stop () |
|
{ |
|
if (m_PortDestination) |
|
m_PortDestination->ResetAcceptor (); |
|
auto localDestination = GetLocalDestination (); |
|
if (localDestination) |
|
localDestination->StopAcceptingStreams (); |
|
|
|
ClearHandlers (); |
|
} |
|
|
|
void I2PServerTunnel::HandleResolve (const boost::system::error_code& ecode, boost::asio::ip::tcp::resolver::iterator it, |
|
std::shared_ptr<boost::asio::ip::tcp::resolver> resolver) |
|
{ |
|
if (!ecode) |
|
{ |
|
bool found = false; |
|
boost::asio::ip::tcp::endpoint ep; |
|
if (m_LocalAddress) |
|
{ |
|
boost::asio::ip::tcp::resolver::iterator end; |
|
while (it != end) |
|
{ |
|
ep = *it; |
|
if (!ep.address ().is_unspecified ()) |
|
{ |
|
if (ep.address ().is_v4 ()) |
|
{ |
|
if (m_LocalAddress->is_v4 ()) found = true; |
|
} |
|
else if (ep.address ().is_v6 ()) |
|
{ |
|
if (i2p::util::net::IsYggdrasilAddress (ep.address ())) |
|
{ |
|
if (i2p::util::net::IsYggdrasilAddress (*m_LocalAddress)) |
|
found = true; |
|
} |
|
else if (m_LocalAddress->is_v6 ()) |
|
found = true; |
|
} |
|
} |
|
if (found) break; |
|
it++; |
|
} |
|
} |
|
else |
|
{ |
|
found = true; |
|
ep = *it; // first available |
|
} |
|
if (!found) |
|
{ |
|
LogPrint (eLogError, "I2PTunnel: Unable to resolve to compatible address"); |
|
return; |
|
} |
|
|
|
auto addr = ep.address (); |
|
LogPrint (eLogInfo, "I2PTunnel: Server tunnel ", (*it).host_name (), " has been resolved to ", addr); |
|
m_Endpoint.address (addr); |
|
Accept (); |
|
} |
|
else |
|
LogPrint (eLogError, "I2PTunnel: Unable to resolve server tunnel address: ", ecode.message ()); |
|
} |
|
|
|
void I2PServerTunnel::SetAccessList (const std::set<i2p::data::IdentHash>& accessList) |
|
{ |
|
m_AccessList = accessList; |
|
m_IsAccessList = true; |
|
} |
|
|
|
void I2PServerTunnel::SetLocalAddress (const std::string& localAddress) |
|
{ |
|
boost::system::error_code ec; |
|
auto addr = boost::asio::ip::address::from_string(localAddress, ec); |
|
if (!ec) |
|
m_LocalAddress.reset (new boost::asio::ip::address (addr)); |
|
else |
|
LogPrint (eLogError, "I2PTunnel: Can't set local address ", localAddress); |
|
} |
|
|
|
void I2PServerTunnel::SetSSL (bool ssl) |
|
{ |
|
if (ssl) |
|
{ |
|
m_SSLCtx = std::make_shared<boost::asio::ssl::context> (boost::asio::ssl::context::sslv23); |
|
m_SSLCtx->set_verify_mode(boost::asio::ssl::context::verify_none); |
|
} |
|
else |
|
m_SSLCtx = nullptr; |
|
} |
|
|
|
void I2PServerTunnel::Accept () |
|
{ |
|
if (m_PortDestination) |
|
m_PortDestination->SetAcceptor (std::bind (&I2PServerTunnel::HandleAccept, this, std::placeholders::_1)); |
|
|
|
auto localDestination = GetLocalDestination (); |
|
if (localDestination) |
|
{ |
|
if (!localDestination->IsAcceptingStreams ()) // set it as default if not set yet |
|
localDestination->AcceptStreams (std::bind (&I2PServerTunnel::HandleAccept, this, std::placeholders::_1)); |
|
} |
|
else |
|
LogPrint (eLogError, "I2PTunnel: Local destination not set for server tunnel"); |
|
} |
|
|
|
void I2PServerTunnel::HandleAccept (std::shared_ptr<i2p::stream::Stream> stream) |
|
{ |
|
if (stream) |
|
{ |
|
if (m_IsAccessList) |
|
{ |
|
if (!m_AccessList.count (stream->GetRemoteIdentity ()->GetIdentHash ())) |
|
{ |
|
LogPrint (eLogWarning, "I2PTunnel: Address ", stream->GetRemoteIdentity ()->GetIdentHash ().ToBase32 (), " is not in white list. Incoming connection dropped"); |
|
stream->Close (); |
|
return; |
|
} |
|
} |
|
// new connection |
|
auto conn = CreateI2PConnection (stream); |
|
AddHandler (conn); |
|
if (m_LocalAddress) |
|
conn->Connect (*m_LocalAddress); |
|
else |
|
conn->Connect (m_IsUniqueLocal); |
|
} |
|
} |
|
|
|
std::shared_ptr<I2PTunnelConnection> I2PServerTunnel::CreateI2PConnection (std::shared_ptr<i2p::stream::Stream> stream) |
|
{ |
|
return std::make_shared<I2PTunnelConnection> (this, stream, GetEndpoint (), true, m_SSLCtx); |
|
|
|
} |
|
|
|
I2PServerTunnelHTTP::I2PServerTunnelHTTP (const std::string& name, const std::string& address, |
|
int port, std::shared_ptr<ClientDestination> localDestination, |
|
const std::string& host, int inport, bool gzip): |
|
I2PServerTunnel (name, address, port, localDestination, inport, gzip), |
|
m_Host (host) |
|
{ |
|
} |
|
|
|
std::shared_ptr<I2PTunnelConnection> I2PServerTunnelHTTP::CreateI2PConnection (std::shared_ptr<i2p::stream::Stream> stream) |
|
{ |
|
return std::make_shared<I2PServerTunnelConnectionHTTP> (this, stream, GetEndpoint (), m_Host, GetSSLCtx ()); |
|
} |
|
|
|
I2PServerTunnelIRC::I2PServerTunnelIRC (const std::string& name, const std::string& address, |
|
int port, std::shared_ptr<ClientDestination> localDestination, |
|
const std::string& webircpass, int inport, bool gzip): |
|
I2PServerTunnel (name, address, port, localDestination, inport, gzip), |
|
m_WebircPass (webircpass) |
|
{ |
|
} |
|
|
|
std::shared_ptr<I2PTunnelConnection> I2PServerTunnelIRC::CreateI2PConnection (std::shared_ptr<i2p::stream::Stream> stream) |
|
{ |
|
return std::make_shared<I2PTunnelConnectionIRC> (this, stream, GetEndpoint (), m_WebircPass, GetSSLCtx ()); |
|
} |
|
} |
|
} |
|
|
|
|