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i2pd/SAM.cpp
Meeh af0bdc2a5e Merge branch 'master' of github-meeh420:PrivacySolutions/i2pd 
Note; we use _MSC_VER instead of _WIN32 for MSVC spesific code.

* 'master' of github-meeh420:PrivacySolutions/i2pd: (35 commits)
  handle incoming datagramms
  send datagram through destination's thread
  incoming ipv6 connections
  support ipv6 for outgoing NTCP connections
  some cleanup
  Update Daemon.cpp
  Add Upstart job to debian packaging
  Implement reload in init script
  Rename init.d to i2pd.init
  Decouple logging and daemonization
  verify signature through remore identity
  moved remote RI and identity to TransportSession
  set unreachable trough NetDb
  moved AddressBook to ClientContext
  initialize router identity
  don't specify RI for inbound NTCP connections
  use remote router indentity
  take identity of local RI from private keys
  send datagram from SAM
  fixed windows build
  ...

Conflicts:
	SAM.cpp
2014-10-27 22:56:31 +01:00

733 lines
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#include <string.h>
#include <stdio.h>
#ifdef _MSC_VER
#include <stdlib.h>
#endif
#include <boost/bind.hpp>
#include "base64.h"
#include "Identity.h"
#include "Log.h"
#include "NetDb.h"
#include "Destination.h"
#include "ClientContext.h"
#include "SAM.h"
namespace i2p
{
namespace client
{
SAMSocket::SAMSocket (SAMBridge& owner):
m_Owner (owner), m_Socket (m_Owner.GetService ()), m_Timer (m_Owner.GetService ()),
m_SocketType (eSAMSocketTypeUnknown), m_IsSilent (false), m_Stream (nullptr),
m_Session (nullptr)
{
}
SAMSocket::~SAMSocket ()
{
if (m_Stream)
{
m_Stream->Close ();
i2p::stream::DeleteStream (m_Stream);
m_Stream = nullptr;
}
}
void SAMSocket::Terminate ()
{
if (m_Stream)
{
m_Stream->Close ();
i2p::stream::DeleteStream (m_Stream);
m_Stream = nullptr;
}
switch (m_SocketType)
{
case eSAMSocketTypeSession:
m_Owner.CloseSession (m_ID);
break;
case eSAMSocketTypeStream:
{
if (m_Session)
m_Session->sockets.remove (this);
break;
}
case eSAMSocketTypeAcceptor:
{
if (m_Session)
{
m_Session->sockets.remove (this);
m_Session->localDestination->StopAcceptingStreams ();
}
break;
}
default:
;
}
m_Socket.close ();
// delete this;
}
void SAMSocket::ReceiveHandshake ()
{
m_Socket.async_read_some (boost::asio::buffer(m_Buffer, SAM_SOCKET_BUFFER_SIZE),
boost::bind(&SAMSocket::HandleHandshakeReceived, this,
boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred));
}
void SAMSocket::HandleHandshakeReceived (const boost::system::error_code& ecode, std::size_t bytes_transferred)
{
if (ecode)
{
LogPrint ("SAM handshake read error: ", ecode.message ());
if (ecode != boost::asio::error::operation_aborted)
Terminate ();
}
else
{
m_Buffer[bytes_transferred] = 0;
LogPrint ("SAM handshake ", m_Buffer);
if (!memcmp (m_Buffer, SAM_HANDSHAKE, strlen (SAM_HANDSHAKE)))
{
// TODO: check version
boost::asio::async_write (m_Socket, boost::asio::buffer (SAM_HANDSHAKE_REPLY, strlen (SAM_HANDSHAKE_REPLY)), boost::asio::transfer_all (),
boost::bind(&SAMSocket::HandleHandshakeReplySent, this,
boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred));
}
else
{
LogPrint ("SAM handshake mismatch");
Terminate ();
}
}
}
void SAMSocket::HandleHandshakeReplySent (const boost::system::error_code& ecode, std::size_t bytes_transferred)
{
if (ecode)
{
LogPrint ("SAM handshake reply send error: ", ecode.message ());
if (ecode != boost::asio::error::operation_aborted)
Terminate ();
}
else
{
m_Socket.async_read_some (boost::asio::buffer(m_Buffer, SAM_SOCKET_BUFFER_SIZE),
boost::bind(&SAMSocket::HandleMessage, this,
boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred));
}
}
void SAMSocket::SendMessageReply (const char * msg, size_t len, bool close)
{
if (!m_IsSilent || m_SocketType == eSAMSocketTypeAcceptor)
boost::asio::async_write (m_Socket, boost::asio::buffer (msg, len), boost::asio::transfer_all (),
boost::bind(&SAMSocket::HandleMessageReplySent, this,
boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred, close));
else
{
if (close)
Terminate ();
else
Receive ();
}
}
void SAMSocket::HandleMessageReplySent (const boost::system::error_code& ecode, std::size_t bytes_transferred, bool close)
{
if (ecode)
{
LogPrint ("SAM reply send error: ", ecode.message ());
if (ecode != boost::asio::error::operation_aborted)
Terminate ();
}
else
{
if (close)
Terminate ();
else
Receive ();
}
}
void SAMSocket::HandleMessage (const boost::system::error_code& ecode, std::size_t bytes_transferred)
{
if (ecode)
{
LogPrint ("SAM read error: ", ecode.message ());
if (ecode != boost::asio::error::operation_aborted)
Terminate ();
}
else
{
m_Buffer[bytes_transferred] = 0;
char * eol = strchr (m_Buffer, '\n');
if (eol)
{
*eol = 0;
char * separator = strchr (m_Buffer, ' ');
if (separator)
{
separator = strchr (separator + 1, ' ');
if (separator)
*separator = 0;
else
separator = eol;
if (!strcmp (m_Buffer, SAM_SESSION_CREATE))
ProcessSessionCreate (separator + 1, bytes_transferred - (separator - m_Buffer) - 1);
else if (!strcmp (m_Buffer, SAM_STREAM_CONNECT))
ProcessStreamConnect (separator + 1, bytes_transferred - (separator - m_Buffer) - 1);
else if (!strcmp (m_Buffer, SAM_STREAM_ACCEPT))
ProcessStreamAccept (separator + 1, bytes_transferred - (separator - m_Buffer) - 1);
else if (!strcmp (m_Buffer, SAM_DEST_GENERATE))
ProcessDestGenerate ();
else if (!strcmp (m_Buffer, SAM_NAMING_LOOKUP))
ProcessNamingLookup (separator + 1, bytes_transferred - (separator - m_Buffer) - 1);
else
{
LogPrint ("SAM unexpected message ", m_Buffer);
Terminate ();
}
}
else
{
LogPrint ("SAM malformed message ", m_Buffer);
Terminate ();
}
}
else
{
LogPrint ("SAM malformed message ", m_Buffer);
Terminate ();
}
}
}
void SAMSocket::ProcessSessionCreate (char * buf, size_t len)
{
LogPrint ("SAM session create: ", buf);
std::map<std::string, std::string> params;
ExtractParams (buf, len, params);
std::string& style = params[SAM_PARAM_STYLE];
std::string& id = params[SAM_PARAM_ID];
std::string& destination = params[SAM_PARAM_DESTINATION];
m_ID = id;
if (m_Owner.FindSession (id))
{
// session exists
SendMessageReply (SAM_SESSION_CREATE_DUPLICATED_ID, strlen(SAM_SESSION_CREATE_DUPLICATED_ID), true);
return;
}
m_Session = m_Owner.CreateSession (id, destination == SAM_VALUE_TRANSIENT ? "" : destination);
if (m_Session)
{
m_SocketType = eSAMSocketTypeSession;
if (m_Session->localDestination->IsReady ())
{
if (style == SAM_VALUE_DATAGRAM)
m_Session->localDestination->CreateDatagramDestination ();
SendSessionCreateReplyOk ();
}
else
{
m_Timer.expires_from_now (boost::posix_time::seconds(SAM_SESSION_READINESS_CHECK_INTERVAL));
m_Timer.async_wait (boost::bind (&SAMSocket::HandleSessionReadinessCheckTimer,
this, boost::asio::placeholders::error));
}
}
else
SendMessageReply (SAM_SESSION_CREATE_DUPLICATED_DEST, strlen(SAM_SESSION_CREATE_DUPLICATED_DEST), true);
}
void SAMSocket::HandleSessionReadinessCheckTimer (const boost::system::error_code& ecode)
{
if (ecode != boost::asio::error::operation_aborted)
{
if (m_Session->localDestination->IsReady ())
SendSessionCreateReplyOk ();
else
{
m_Timer.expires_from_now (boost::posix_time::seconds(SAM_SESSION_READINESS_CHECK_INTERVAL));
m_Timer.async_wait (boost::bind (&SAMSocket::HandleSessionReadinessCheckTimer,
this, boost::asio::placeholders::error));
}
}
}
void SAMSocket::SendSessionCreateReplyOk ()
{
uint8_t buf[1024];
char priv[1024];
size_t l = m_Session->localDestination->GetPrivateKeys ().ToBuffer (buf, 1024);
size_t l1 = i2p::data::ByteStreamToBase64 (buf, l, priv, 1024);
priv[l1] = 0;
#ifdef _MSC_VER
size_t l2 = sprintf_s (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_SESSION_CREATE_REPLY_OK, priv);
#else
size_t l2 = snprintf (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_SESSION_CREATE_REPLY_OK, priv);
#endif
SendMessageReply (m_Buffer, l2, false);
}
void SAMSocket::ProcessStreamConnect (char * buf, size_t len)
{
LogPrint ("SAM stream connect: ", buf);
std::map<std::string, std::string> params;
ExtractParams (buf, len, params);
std::string& id = params[SAM_PARAM_ID];
std::string& destination = params[SAM_PARAM_DESTINATION];
std::string& silent = params[SAM_PARAM_SILENT];
if (silent == SAM_VALUE_TRUE) m_IsSilent = true;
m_ID = id;
m_Session = m_Owner.FindSession (id);
if (m_Session)
{
uint8_t ident[1024];
size_t l = i2p::data::Base64ToByteStream (destination.c_str (), destination.length (), ident, 1024);
i2p::data::IdentityEx dest;
dest.FromBuffer (ident, l);
auto leaseSet = i2p::data::netdb.FindLeaseSet (dest.GetIdentHash ());
if (leaseSet)
Connect (*leaseSet);
else
{
i2p::data::netdb.RequestDestination (dest.GetIdentHash (), true, m_Session->localDestination->GetTunnelPool ());
m_Timer.expires_from_now (boost::posix_time::seconds(SAM_CONNECT_TIMEOUT));
m_Timer.async_wait (boost::bind (&SAMSocket::HandleStreamDestinationRequestTimer,
this, boost::asio::placeholders::error, dest.GetIdentHash ()));
}
}
else
SendMessageReply (SAM_STREAM_STATUS_INVALID_ID, strlen(SAM_STREAM_STATUS_INVALID_ID), true);
}
void SAMSocket::Connect (const i2p::data::LeaseSet& remote)
{
m_SocketType = eSAMSocketTypeStream;
m_Session->sockets.push_back (this);
m_Stream = m_Session->localDestination->CreateStream (remote);
m_Stream->Send ((uint8_t *)m_Buffer, 0); // connect
I2PReceive ();
SendMessageReply (SAM_STREAM_STATUS_OK, strlen(SAM_STREAM_STATUS_OK), false);
}
void SAMSocket::HandleStreamDestinationRequestTimer (const boost::system::error_code& ecode, i2p::data::IdentHash ident)
{
if (!ecode) // timeout expired
{
auto leaseSet = m_Session->localDestination->FindLeaseSet (ident);
if (leaseSet)
Connect (*leaseSet);
else
{
LogPrint ("SAM destination to connect not found");
SendMessageReply (SAM_STREAM_STATUS_CANT_REACH_PEER, strlen(SAM_STREAM_STATUS_CANT_REACH_PEER), true);
}
}
}
void SAMSocket::HandleNamingLookupDestinationRequestTimer (const boost::system::error_code& ecode, i2p::data::IdentHash ident)
{
if (!ecode) // timeout expired
{
auto leaseSet = m_Session->localDestination->FindLeaseSet (ident);
if (leaseSet)
SendNamingLookupReply (leaseSet);
else
{
LogPrint ("SAM name destination not found");
#ifdef _MSC_VER
size_t len = sprintf_s (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_NAMING_REPLY_KEY_NOT_FOUND, (ident.ToBase32 () + ".b32.i2p").c_str ());
#else
size_t len = snprintf (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_NAMING_REPLY_KEY_NOT_FOUND, (ident.ToBase32 () + ".b32.i2p").c_str ());
#endif
SendMessageReply (m_Buffer, len, false);
}
}
}
void SAMSocket::ProcessStreamAccept (char * buf, size_t len)
{
LogPrint ("SAM stream accept: ", buf);
std::map<std::string, std::string> params;
ExtractParams (buf, len, params);
std::string& id = params[SAM_PARAM_ID];
std::string& silent = params[SAM_PARAM_SILENT];
if (silent == SAM_VALUE_TRUE) m_IsSilent = true;
m_ID = id;
m_Session = m_Owner.FindSession (id);
if (m_Session)
{
if (!m_Session->localDestination->IsAcceptingStreams ())
{
m_SocketType = eSAMSocketTypeAcceptor;
m_Session->sockets.push_back (this);
m_Session->localDestination->AcceptStreams (std::bind (&SAMSocket::HandleI2PAccept, this, std::placeholders::_1));
SendMessageReply (SAM_STREAM_STATUS_OK, strlen(SAM_STREAM_STATUS_OK), false);
}
else
SendMessageReply (SAM_STREAM_STATUS_I2P_ERROR, strlen(SAM_STREAM_STATUS_I2P_ERROR), true);
}
else
SendMessageReply (SAM_STREAM_STATUS_INVALID_ID, strlen(SAM_STREAM_STATUS_INVALID_ID), true);
}
void SAMSocket::ProcessDestGenerate ()
{
LogPrint ("SAM dest generate");
auto localDestination = i2p::client::context.CreateNewLocalDestination ();
if (localDestination)
{
uint8_t buf[1024];
char priv[1024], pub[1024];
size_t l = localDestination->GetPrivateKeys ().ToBuffer (buf, 1024);
size_t l1 = i2p::data::ByteStreamToBase64 (buf, l, priv, 1024);
priv[l1] = 0;
l = localDestination->GetIdentity ().ToBuffer (buf, 1024);
l1 = i2p::data::ByteStreamToBase64 (buf, l, pub, 1024);
pub[l1] = 0;
#ifdef _MSC_VER
size_t len = sprintf_s (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_DEST_REPLY, pub, priv);
#else
size_t len = snprintf (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_DEST_REPLY, pub, priv);
#endif
SendMessageReply (m_Buffer, len, true);
}
else
SendMessageReply (SAM_DEST_REPLY_I2P_ERROR, strlen(SAM_DEST_REPLY_I2P_ERROR), true);
}
void SAMSocket::ProcessNamingLookup (char * buf, size_t len)
{
LogPrint ("SAM naming lookup: ", buf);
std::map<std::string, std::string> params;
ExtractParams (buf, len, params);
std::string& name = params[SAM_PARAM_NAME];
i2p::data::IdentHash ident;
if (name == "ME")
SendNamingLookupReply (nullptr);
else if (m_Session && context.GetAddressBook ().GetIdentHash (name, ident))
{
auto leaseSet = m_Session->localDestination->FindLeaseSet (ident);
if (leaseSet)
SendNamingLookupReply (leaseSet);
else
{
i2p::data::netdb.RequestDestination (ident, true, m_Session->localDestination->GetTunnelPool ());
m_Timer.expires_from_now (boost::posix_time::seconds(SAM_NAMING_LOOKUP_TIMEOUT));
m_Timer.async_wait (boost::bind (&SAMSocket::HandleNamingLookupDestinationRequestTimer,
this, boost::asio::placeholders::error, ident));
}
}
else
{
#ifdef _MSC_VER
size_t len = sprintf_s (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_NAMING_REPLY_INVALID_KEY, name.c_str());
#else
size_t len = snprintf (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_NAMING_REPLY_INVALID_KEY, name.c_str());
#endif
SendMessageReply (m_Buffer, len, false);
}
}
void SAMSocket::SendNamingLookupReply (const i2p::data::LeaseSet * leaseSet)
{
uint8_t buf[1024];
char pub[1024];
const i2p::data::IdentityEx& identity = leaseSet ? leaseSet->GetIdentity () : m_Session->localDestination->GetIdentity ();
size_t l = identity.ToBuffer (buf, 1024);
size_t l1 = i2p::data::ByteStreamToBase64 (buf, l, pub, 1024);
pub[l1] = 0;
#ifdef _MSC_VER
size_t l2 = sprintf_s (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_NAMING_REPLY, pub);
#else
size_t l2 = snprintf (m_Buffer, SAM_SOCKET_BUFFER_SIZE, SAM_NAMING_REPLY, pub);
#endif
SendMessageReply (m_Buffer, l2, false);
}
void SAMSocket::ExtractParams (char * buf, size_t len, std::map<std::string, std::string>& params)
{
char * separator;
do
{
separator = strchr (buf, ' ');
if (separator) *separator = 0;
char * value = strchr (buf, '=');
if (value)
{
*value = 0;
value++;
params[buf] = value;
}
buf = separator + 1;
}
while (separator);
}
void SAMSocket::Receive ()
{
m_Socket.async_read_some (boost::asio::buffer(m_Buffer, SAM_SOCKET_BUFFER_SIZE),
boost::bind((m_SocketType == eSAMSocketTypeSession) ? &SAMSocket::HandleMessage : &SAMSocket::HandleReceived,
this, boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred));
}
void SAMSocket::HandleReceived (const boost::system::error_code& ecode, std::size_t bytes_transferred)
{
if (ecode)
{
LogPrint ("SAM read error: ", ecode.message ());
if (ecode != boost::asio::error::operation_aborted)
Terminate ();
}
else
{
if (m_Stream)
m_Stream->Send ((uint8_t *)m_Buffer, bytes_transferred);
Receive ();
}
}
void SAMSocket::I2PReceive ()
{
if (m_Stream)
m_Stream->AsyncReceive (boost::asio::buffer (m_StreamBuffer, SAM_SOCKET_BUFFER_SIZE),
boost::bind (&SAMSocket::HandleI2PReceive, this,
boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred),
SAM_SOCKET_CONNECTION_MAX_IDLE);
}
void SAMSocket::HandleI2PReceive (const boost::system::error_code& ecode, std::size_t bytes_transferred)
{
if (ecode)
{
LogPrint ("SAM stream read error: ", ecode.message ());
if (ecode != boost::asio::error::operation_aborted)
Terminate ();
}
else
{
boost::asio::async_write (m_Socket, boost::asio::buffer (m_StreamBuffer, bytes_transferred),
boost::bind (&SAMSocket::HandleWriteI2PData, this, boost::asio::placeholders::error));
}
}
void SAMSocket::HandleWriteI2PData (const boost::system::error_code& ecode)
{
if (ecode)
{
LogPrint ("SAM socket write error: ", ecode.message ());
if (ecode != boost::asio::error::operation_aborted)
Terminate ();
}
else
I2PReceive ();
}
void SAMSocket::HandleI2PAccept (i2p::stream::Stream * stream)
{
if (stream)
{
LogPrint ("SAM incoming I2P connection for session ", m_ID);
m_Stream = stream;
auto session = m_Owner.FindSession (m_ID);
if (session)
session->localDestination->StopAcceptingStreams ();
if (!m_IsSilent)
{
// send remote peer address
uint8_t ident[1024];
size_t l = stream->GetRemoteIdentity ().ToBuffer (ident, 1024);
size_t l1 = i2p::data::ByteStreamToBase64 (ident, l, m_Buffer, SAM_SOCKET_BUFFER_SIZE);
m_Buffer[l1] = '\n';
SendMessageReply (m_Buffer, l1 + 1, false);
}
I2PReceive ();
}
}
SAMBridge::SAMBridge (int port):
m_IsRunning (false), m_Thread (nullptr),
m_Acceptor (m_Service, boost::asio::ip::tcp::endpoint(boost::asio::ip::tcp::v4(), port)),
m_DatagramEndpoint (boost::asio::ip::udp::v4 (), port-1), m_DatagramSocket (m_Service, m_DatagramEndpoint),
m_NewSocket (nullptr)
{
}
SAMBridge::~SAMBridge ()
{
Stop ();
delete m_NewSocket;
}
void SAMBridge::Start ()
{
Accept ();
ReceiveDatagram ();
m_IsRunning = true;
m_Thread = new std::thread (std::bind (&SAMBridge::Run, this));
}
void SAMBridge::Stop ()
{
m_IsRunning = false;
m_Service.stop ();
if (m_Thread)
{
m_Thread->join ();
delete m_Thread;
m_Thread = nullptr;
}
}
void SAMBridge::Run ()
{
while (m_IsRunning)
{
try
{
m_Service.run ();
}
catch (std::exception& ex)
{
LogPrint ("SAM: ", ex.what ());
}
}
}
void SAMBridge::Accept ()
{
m_NewSocket = new SAMSocket (*this);
m_Acceptor.async_accept (m_NewSocket->GetSocket (), boost::bind (&SAMBridge::HandleAccept, this,
boost::asio::placeholders::error));
}
void SAMBridge::HandleAccept(const boost::system::error_code& ecode)
{
if (!ecode)
{
LogPrint ("New SAM connection from ", m_NewSocket->GetSocket ().remote_endpoint ());
m_NewSocket->ReceiveHandshake ();
}
else
{
LogPrint ("SAM accept error: ", ecode.message ());
delete m_NewSocket;
m_NewSocket = nullptr;
}
if (ecode != boost::asio::error::operation_aborted)
Accept ();
}
SAMSession * SAMBridge::CreateSession (const std::string& id, const std::string& destination)
{
ClientDestination * localDestination = nullptr;
if (destination != "")
{
uint8_t * buf = new uint8_t[destination.length ()];
size_t l = i2p::data::Base64ToByteStream (destination.c_str (), destination.length (), buf, destination.length ());
i2p::data::PrivateKeys keys;
keys.FromBuffer (buf, l);
delete[] buf;
localDestination = i2p::client::context.CreateNewLocalDestination (keys);
}
else // transient
localDestination = i2p::client::context.CreateNewLocalDestination ();
if (localDestination)
{
SAMSession session;
session.localDestination = localDestination;
std::unique_lock<std::mutex> l(m_SessionsMutex);
auto ret = m_Sessions.insert (std::pair<std::string, SAMSession>(id, session));
if (!ret.second)
LogPrint ("Session ", id, " already exists");
return &(ret.first->second);
}
return nullptr;
}
void SAMBridge::CloseSession (const std::string& id)
{
std::unique_lock<std::mutex> l(m_SessionsMutex);
auto it = m_Sessions.find (id);
if (it != m_Sessions.end ())
{
for (auto it1 : it->second.sockets)
delete it1;
it->second.sockets.clear ();
it->second.localDestination->Stop ();
m_Sessions.erase (it);
}
}
SAMSession * SAMBridge::FindSession (const std::string& id)
{
std::unique_lock<std::mutex> l(m_SessionsMutex);
auto it = m_Sessions.find (id);
if (it != m_Sessions.end ())
return &it->second;
return nullptr;
}
void SAMBridge::ReceiveDatagram ()
{
m_DatagramSocket.async_receive_from (
boost::asio::buffer (m_DatagramReceiveBuffer, i2p::datagram::MAX_DATAGRAM_SIZE),
m_SenderEndpoint,
boost::bind (&SAMBridge::HandleReceivedDatagram, this, boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred));
}
void SAMBridge::HandleReceivedDatagram (const boost::system::error_code& ecode, std::size_t bytes_transferred)
{
if (!ecode)
{
m_DatagramReceiveBuffer[bytes_transferred] = 0;
char * eol = strchr ((char *)m_DatagramReceiveBuffer, '\n');
*eol = 0; eol++;
size_t payloadLen = bytes_transferred - ((uint8_t *)eol - m_DatagramReceiveBuffer);
LogPrint ("SAM datagram received ", m_DatagramReceiveBuffer," size=", payloadLen);
char * sessionID = strchr ((char *)m_DatagramReceiveBuffer, ' ');
if (sessionID)
{
sessionID++;
char * destination = strchr (sessionID, ' ');
if (destination)
{
*destination = 0; destination++;
auto session = FindSession (sessionID);
if (session)
{
uint8_t ident[1024];
size_t l = i2p::data::Base64ToByteStream (destination, strlen(destination), ident, 1024);
i2p::data::IdentityEx dest;
dest.FromBuffer (ident, l);
auto leaseSet = i2p::data::netdb.FindLeaseSet (dest.GetIdentHash ());
if (leaseSet)
session->localDestination->GetDatagramDestination ()->
SendDatagramTo ((uint8_t *)eol, payloadLen, *leaseSet);
else
{
LogPrint ("SAM datagram destination not found");
i2p::data::netdb.RequestDestination (dest.GetIdentHash (), true,
session->localDestination->GetTunnelPool ());
}
}
else
LogPrint ("Session ", sessionID, " not found");
}
else
LogPrint ("Missing destination key");
}
else
LogPrint ("Missing sessionID");
ReceiveDatagram ();
}
else
LogPrint ("SAM datagram receive error: ", ecode.message ());
}
}
}
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