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external IP detection

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orignal 2014-02-08 21:06:40 -05:00
parent 74e1840bad
commit ec5eafafeb
8 changed files with 106 additions and 9 deletions
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40
SSU.cpp
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@ -85,7 +85,7 @@ namespace ssu
case PAYLOAD_TYPE_TEST:
LogPrint ("SSU test received");
break;
case PAYLOAD_TYPE_SESSION_DESTROY:
case PAYLOAD_TYPE_SESSION_DESTROYED:
LogPrint ("SSU session destroy received");
break;
default:
@ -129,6 +129,7 @@ namespace ssu
boost::asio::ip::address_v4 ourIP (be32toh (*(uint32_t* )(ourAddress)));
uint16_t ourPort = be16toh (*(uint16_t *)(ourAddress + 4));
LogPrint ("Our external address is ", ourIP.to_string (), ":", ourPort);
i2p::context.UpdateAddress (ourIP.to_string ().c_str ());
uint32_t relayTag = be32toh (*(uint32_t *)(buf + sizeof (SSUHeader) + 263));
SendSessionConfirmed (buf + sizeof (SSUHeader), ourAddress, relayTag);
m_State = eSessionStateEstablished;
@ -357,6 +358,11 @@ namespace ssu
SendSessionRequest ();
}
void SSUSession::Close ()
{
SendSesionDestroyed ();
}
void SSUSession::SendI2NPMessage (I2NPMessage * msg)
{
// TODO:
@ -445,7 +451,7 @@ namespace ssu
void SSUSession::SendMsgAck (uint32_t msgID)
{
uint8_t buf[48]; // actual length is 44 = 37 + 7 but pad it to multiple of 16
uint8_t buf[48 + 18]; // actual length is 44 = 37 + 7 but pad it to multiple of 16
uint8_t iv[16];
uint8_t * payload = buf + sizeof (SSUHeader);
*payload = DATA_FLAG_EXPLICIT_ACKS_INCLUDED; // flag
@ -463,6 +469,16 @@ namespace ssu
m_Server->Send (buf, 48, m_RemoteEndpoint);
}
void SSUSession::SendSesionDestroyed ()
{
uint8_t buf[48 + 18], iv[16];
CryptoPP::RandomNumberGenerator& rnd = i2p::context.GetRandomNumberGenerator ();
rnd.GenerateBlock (iv, 16); // random iv
// encrypt message with session key
FillHeaderAndEncrypt (PAYLOAD_TYPE_SESSION_DESTROYED, buf, 48, m_SessionKey, iv, m_MacKey);
m_Server->Send (buf, 48, m_RemoteEndpoint);
}
SSUServer::SSUServer (boost::asio::io_service& service, int port):
m_Endpoint (boost::asio::ip::udp::v4 (), port), m_Socket (service, m_Endpoint)
{
@ -546,6 +562,26 @@ namespace ssu
}
return session;
}
void SSUServer::DeleteSession (SSUSession * session)
{
if (session)
{
session->Close ();
m_Sessions.erase (session->GetRemoteEndpoint ());
delete session;
}
}
void SSUServer::DeleteAllSessions ()
{
for (auto it: m_Sessions)
{
it.second->Close ();
delete it.second;
}
m_Sessions.clear ();
}
}
}