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#include <boost/bind.hpp>
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#include <boost/bind/protect.hpp>
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#include <boost/lexical_cast.hpp>
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#include "base64.h"
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#include "Log.h"
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#include "Tunnel.h"
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#include "TransitTunnel.h"
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#include "Transports.h"
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#include "NetDb.h"
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#include "HTTPServer.h"
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namespace i2p
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{
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namespace util
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{
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namespace misc_strings
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{
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const char name_value_separator[] = { ':', ' ' };
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const char crlf[] = { '\r', '\n' };
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} // namespace misc_strings
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std::vector<boost::asio::const_buffer> HTTPConnection::reply::to_buffers()
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{
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std::vector<boost::asio::const_buffer> buffers;
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if (headers.size () > 0)
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{
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buffers.push_back (boost::asio::buffer ("HTTP/1.0 200 OK\r\n")); // always OK
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for (std::size_t i = 0; i < headers.size(); ++i)
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{
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header& h = headers[i];
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buffers.push_back(boost::asio::buffer(h.name));
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buffers.push_back(boost::asio::buffer(misc_strings::name_value_separator));
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buffers.push_back(boost::asio::buffer(h.value));
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buffers.push_back(boost::asio::buffer(misc_strings::crlf));
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}
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buffers.push_back(boost::asio::buffer(misc_strings::crlf));
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}
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buffers.push_back(boost::asio::buffer(content));
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return buffers;
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}
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void HTTPConnection::Terminate ()
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{
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if (m_Stream)
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{
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m_Stream->Close ();
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DeleteStream (m_Stream);
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}
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m_Socket->close ();
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delete this;
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}
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void HTTPConnection::Receive ()
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{
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m_Socket->async_read_some (boost::asio::buffer (m_Buffer, 8192),
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boost::bind(&HTTPConnection::HandleReceive, this,
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boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred));
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}
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void HTTPConnection::HandleReceive (const boost::system::error_code& ecode, std::size_t bytes_transferred)
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{
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if (!ecode)
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{
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m_Buffer[bytes_transferred] = 0;
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auto address = ExtractAddress ();
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if (address.length () > 1) // not just '/'
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{
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std::string uri ("/"), b32;
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size_t pos = address.find ('/', 1);
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if (pos == std::string::npos)
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b32 = address.substr (1); // excluding leading '/' to end of line
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else
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{
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b32 = address.substr (1, pos - 1); // excluding leading '/' to next '/'
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uri = address.substr (pos); // rest of line
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}
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HandleDestinationRequest (b32, uri);
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}
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else
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HandleRequest ();
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}
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else if (ecode != boost::asio::error::operation_aborted)
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Terminate ();
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}
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std::string HTTPConnection::ExtractAddress ()
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{
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char * get = strstr (m_Buffer, "GET");
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if (get)
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{
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char * http = strstr (get, "HTTP");
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if (http)
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return std::string (get + 4, http - get - 5);
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}
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return "";
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}
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void HTTPConnection::HandleWriteReply (const boost::system::error_code& ecode)
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{
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Terminate ();
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}
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void HTTPConnection::HandleWrite (const boost::system::error_code& ecode)
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{
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if (ecode || (m_Stream && !m_Stream->IsOpen ()))
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Terminate ();
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else // data keeps coming
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AsyncStreamReceive ();
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}
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void HTTPConnection::HandleRequest ()
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{
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std::stringstream s;
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s << "<html>";
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FillContent (s);
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s << "</html>";
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SendReply (s.str ());
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}
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void HTTPConnection::FillContent (std::stringstream& s)
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{
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s << "Our external address:" << "<BR>" << "<BR>";
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for (auto& address : i2p::context.GetRouterInfo().GetAddresses())
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{
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switch (address.transportStyle)
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{
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case i2p::data::RouterInfo::eTransportNTCP:
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s << "NTCP ";
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break;
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case i2p::data::RouterInfo::eTransportSSU:
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s << "SSU ";
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break;
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default:
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s << "Unknown ";
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}
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s << address.host.to_string() << ":" << address.port << "<BR>";
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}
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s << "<P>Tunnels</P>";
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for (auto it: i2p::tunnel::tunnels.GetOutboundTunnels ())
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{
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it->GetTunnelConfig ()->Print (s);
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if (it->GetTunnelPool ())
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s << " " << "Pool";
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if (it->IsFailed ())
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s << " " << "Failed";
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s << " " << (int)it->GetNumSentBytes () << "<BR>";
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}
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for (auto it: i2p::tunnel::tunnels.GetInboundTunnels ())
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{
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it.second->GetTunnelConfig ()->Print (s);
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if (it.second->GetTunnelPool ())
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s << " " << "Pool";
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if (it.second->IsFailed ())
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s << " " << "Failed";
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s << " " << (int)it.second->GetNumReceivedBytes () << "<BR>";
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}
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s << "<P>Transit tunnels</P>";
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for (auto it: i2p::tunnel::tunnels.GetTransitTunnels ())
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{
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if (dynamic_cast<i2p::tunnel::TransitTunnelGateway *>(it.second))
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s << it.second->GetTunnelID () << "-->";
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else if (dynamic_cast<i2p::tunnel::TransitTunnelEndpoint *>(it.second))
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s << "-->" << it.second->GetTunnelID ();
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else
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s << "-->" << it.second->GetTunnelID () << "-->";
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s << " " << it.second->GetNumTransmittedBytes () << "<BR>";
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}
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s << "<P>Transports</P>";
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s << "NTCP<BR>";
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for (auto it: i2p::transports.GetNTCPSessions ())
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{
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// RouterInfo of incoming connection doesn't have address
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bool outgoing = it.second->GetRemoteRouterInfo ().GetNTCPAddress ();
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if (it.second->IsEstablished ())
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{
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if (outgoing) s << "-->";
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s << it.second->GetRemoteRouterInfo ().GetIdentHashAbbreviation () << ": "
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<< it.second->GetSocket ().remote_endpoint().address ().to_string ();
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if (!outgoing) s << "-->";
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s << "<BR>";
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}
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}
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auto ssuServer = i2p::transports.GetSSUServer ();
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if (ssuServer)
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{
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s << "<BR>SSU<BR>";
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for (auto it: ssuServer->GetSessions ())
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{
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// incoming connections don't have remote router
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bool outgoing = it.second->GetRemoteRouter ();
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auto endpoint = it.second->GetRemoteEndpoint ();
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if (outgoing) s << "-->";
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s << endpoint.address ().to_string () << ":" << endpoint.port ();
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if (!outgoing) s << "-->";
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s << "<BR>";
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}
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}
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s << "<p><a href=\"zmw2cyw2vj7f6obx3msmdvdepdhnw2ctc4okza2zjxlukkdfckhq\">Flibusta</a></p>";
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}
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void HTTPConnection::HandleDestinationRequest (const std::string& address, const std::string& uri)
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{
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i2p::data::IdentHash destination;
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std::string fullAddress;
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if (address.find (".i2p") != std::string::npos)
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{
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auto addr = i2p::data::netdb.FindAddress(address);
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if (!addr)
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{
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LogPrint ("Unknown address ", address);
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SendReply ("Unknown address");
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return;
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}
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destination = *addr;
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fullAddress = address;
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}
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else
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{
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if (i2p::data::Base32ToByteStream (address.c_str (), address.length (), (uint8_t *)destination, 32) != 32)
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{
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LogPrint ("Invalid Base32 address ", address);
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SendReply ("Invalid Base32 address");
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return;
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}
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fullAddress = address + ".b32.i2p";
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}
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auto leaseSet = i2p::data::netdb.FindLeaseSet (destination);
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if (!leaseSet || !leaseSet->HasNonExpiredLeases ())
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{
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i2p::data::netdb.Subscribe(destination);
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std::this_thread::sleep_for (std::chrono::seconds(10)); // wait for 10 seconds
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leaseSet = i2p::data::netdb.FindLeaseSet (destination);
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if (!leaseSet || !leaseSet->HasNonExpiredLeases ()) // still no LeaseSet
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{
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SendReply (leaseSet ? "<html>Leases expired</html>" : "<html>LeaseSet not found</html>");
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return;
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}
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}
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if (!m_Stream)
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m_Stream = i2p::stream::CreateStream (*leaseSet);
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if (m_Stream)
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{
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std::string request = "GET " + uri + " HTTP/1.1\n Host:" + fullAddress + "\n";
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m_Stream->Send ((uint8_t *)request.c_str (), request.length (), 10);
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AsyncStreamReceive ();
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}
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}
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void HTTPConnection::AsyncStreamReceive ()
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{
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if (m_Stream)
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m_Stream->AsyncReceive (boost::asio::buffer (m_StreamBuffer, 8192),
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boost::protect (boost::bind (&HTTPConnection::HandleStreamReceive, this,
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boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred)),
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45); // 45 seconds timeout
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}
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void HTTPConnection::HandleStreamReceive (const boost::system::error_code& ecode, std::size_t bytes_transferred)
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{
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if (bytes_transferred)
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{
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boost::asio::async_write (*m_Socket, boost::asio::buffer (m_StreamBuffer, bytes_transferred),
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boost::bind (&HTTPConnection::HandleWrite, this, boost::asio::placeholders::error));
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}
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else
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{
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if (m_Stream && m_Stream->IsOpen ())
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SendReply ("Not responding");
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else
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Terminate ();
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}
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}
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void HTTPConnection::SendReply (const std::string& content)
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{
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m_Reply.content = content;
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m_Reply.headers.resize(2);
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m_Reply.headers[0].name = "Content-Length";
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m_Reply.headers[0].value = boost::lexical_cast<std::string>(m_Reply.content.size());
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m_Reply.headers[1].name = "Content-Type";
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m_Reply.headers[1].value = "text/html";
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boost::asio::async_write (*m_Socket, m_Reply.to_buffers(),
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boost::bind (&HTTPConnection::HandleWriteReply, this,
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boost::asio::placeholders::error));
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}
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HTTPServer::HTTPServer (int port):
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m_Thread (nullptr), m_Work (m_Service),
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m_Acceptor (m_Service, boost::asio::ip::tcp::endpoint (boost::asio::ip::tcp::v4(), port)),
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m_NewSocket (nullptr)
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{
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}
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HTTPServer::~HTTPServer ()
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{
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Stop ();
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}
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void HTTPServer::Start ()
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{
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m_Thread = new std::thread (std::bind (&HTTPServer::Run, this));
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m_Acceptor.listen ();
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Accept ();
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}
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void HTTPServer::Stop ()
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{
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m_Acceptor.close();
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m_Service.stop ();
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if (m_Thread)
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{
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m_Thread->join ();
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delete m_Thread;
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m_Thread = nullptr;
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}
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}
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void HTTPServer::Run ()
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{
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m_Service.run ();
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}
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void HTTPServer::Accept ()
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{
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m_NewSocket = new boost::asio::ip::tcp::socket (m_Service);
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m_Acceptor.async_accept (*m_NewSocket, boost::bind (&HTTPServer::HandleAccept, this,
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boost::asio::placeholders::error));
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}
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void HTTPServer::HandleAccept(const boost::system::error_code& ecode)
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{
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if (!ecode)
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{
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new HTTPConnection (m_NewSocket);
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Accept ();
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}
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}
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}
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}
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