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store relay tag if introducer

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orignal 2014-04-16 15:54:28 -04:00
parent 4341d285aa
commit 73d38f530f
2 changed files with 33 additions and 5 deletions
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34
SSU.cpp
View File

@ -294,6 +294,7 @@ namespace ssu
LogPrint ("SSU is not supported");
return;
}
CryptoPP::RandomNumberGenerator& rnd = i2p::context.GetRandomNumberGenerator ();
uint8_t signedData[532]; // x,y, remote IP, remote port, our IP, our port, relayTag, signed on time
memcpy (signedData, x, 256); // x
@ -311,8 +312,14 @@ namespace ssu
memcpy (signedData + 512, payload - 6, 6); // remote endpoint IP and port
*(uint32_t *)(signedData + 518) = htobe32 (address->host.to_v4 ().to_ulong ()); // our IP
*(uint16_t *)(signedData + 522) = htobe16 (address->port); // our port
*(uint32_t *)(payload) = 0; // relay tag, always 0 for now
payload += 4;
uint32_t relayTag = 0;
if (i2p::context.GetRouterInfo ().IsIntroducer ())
{
rnd.GenerateWord32 (relayTag);
m_Server.AddRelay (relayTag, m_RemoteEndpoint);
}
*(uint32_t *)(payload) = relayTag;
payload += 4; // relay tag
*(uint32_t *)(payload) = htobe32 (i2p::util::GetSecondsSinceEpoch ()); // signed on time
payload += 4;
memcpy (signedData + 524, payload - 8, 8); // relayTag and signed on time
@ -320,7 +327,6 @@ namespace ssu
// TODO: fill padding with random data
uint8_t iv[16];
CryptoPP::RandomNumberGenerator& rnd = i2p::context.GetRandomNumberGenerator ();
rnd.GenerateBlock (iv, 16); // random iv
// encrypt signature and 8 bytes padding with newly created session key
m_Encryption.SetKeyWithIV (m_SessionKey, 32, iv);
@ -929,6 +935,19 @@ namespace ssu
m_Socket.close ();
}
void SSUServer::AddRelay (uint32_t tag, const boost::asio::ip::udp::endpoint& relay)
{
m_Relays[tag] = relay;
}
SSUSession * SSUServer::FindRelaySession (uint32_t tag)
{
auto it = m_Relays.find (tag);
if (it != m_Relays.end ())
return FindSession (it->second);
return nullptr;
}
void SSUServer::Send (uint8_t * buf, size_t len, const boost::asio::ip::udp::endpoint& to)
{
m_Socket.send_to (boost::asio::buffer (buf, len), to);
@ -968,12 +987,17 @@ namespace ssu
if (!router) return nullptr;
auto address = router->GetSSUAddress ();
if (!address) return nullptr;
auto it = m_Sessions.find (boost::asio::ip::udp::endpoint (address->host, address->port));
return FindSession (boost::asio::ip::udp::endpoint (address->host, address->port));
}
SSUSession * SSUServer::FindSession (const boost::asio::ip::udp::endpoint& e)
{
auto it = m_Sessions.find (e);
if (it != m_Sessions.end ())
return it->second;
else
return nullptr;
}
}
SSUSession * SSUServer::GetSession (const i2p::data::RouterInfo * router, bool peerTest)
{

4
SSU.h
View File

@ -157,12 +157,15 @@ namespace ssu
void Stop ();
SSUSession * GetSession (const i2p::data::RouterInfo * router, bool peerTest = false);
SSUSession * FindSession (const i2p::data::RouterInfo * router);
SSUSession * FindSession (const boost::asio::ip::udp::endpoint& e);
void DeleteSession (SSUSession * session);
void DeleteAllSessions ();
boost::asio::io_service& GetService () { return m_Socket.get_io_service(); };
const boost::asio::ip::udp::endpoint& GetEndpoint () const { return m_Endpoint; };
void Send (uint8_t * buf, size_t len, const boost::asio::ip::udp::endpoint& to);
void AddRelay (uint32_t tag, const boost::asio::ip::udp::endpoint& relay);
SSUSession * FindRelaySession (uint32_t tag);
private:
@ -176,6 +179,7 @@ namespace ssu
boost::asio::ip::udp::endpoint m_SenderEndpoint;
uint8_t m_ReceiveBuffer[2*SSU_MTU];
std::map<boost::asio::ip::udp::endpoint, SSUSession *> m_Sessions;
std::map<uint32_t, boost::asio::ip::udp::endpoint> m_Relays; // we are introducer
public:
// for HTTP only