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common termination timer for all NTCP sessions

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orignal 2016-08-17 10:58:57 -04:00
parent ac5394a1dc
commit 3d066ea1b8
2 changed files with 56 additions and 43 deletions
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76
NTCPSession.cpp
View File

@ -21,7 +21,8 @@ namespace transport
NTCPSession::NTCPSession (NTCPServer& server, std::shared_ptr<const i2p::data::RouterInfo> in_RemoteRouter):
TransportSession (in_RemoteRouter, NTCP_TERMINATION_TIMEOUT),
m_Server (server), m_Socket (m_Server.GetService ()),
m_TerminationTimer (m_Server.GetService ()), m_IsEstablished (false), m_IsTerminated (false),
m_IsEstablished (false), m_IsTerminated (false),
m_LastActivityTimestamp (i2p::util::GetSecondsSinceEpoch ()),
m_ReceiveBufferOffset (0), m_NextMessage (nullptr), m_IsSending (false)
{
m_Establisher = new Establisher;
@ -78,7 +79,6 @@ namespace transport
m_Server.RemoveNTCPSession (shared_from_this ());
m_SendQueue.clear ();
m_NextMessage = nullptr;
m_TerminationTimer.cancel ();
LogPrint (eLogDebug, "NTCP: session terminated");
}
}
@ -110,7 +110,6 @@ namespace transport
boost::asio::async_write (m_Socket, boost::asio::buffer (&m_Establisher->phase1, sizeof (NTCPPhase1)), boost::asio::transfer_all (),
std::bind(&NTCPSession::HandlePhase1Sent, shared_from_this (), std::placeholders::_1, std::placeholders::_2));
ScheduleTermination ();
}
void NTCPSession::ServerLogin ()
@ -124,7 +123,6 @@ namespace transport
boost::asio::async_read (m_Socket, boost::asio::buffer(&m_Establisher->phase1, sizeof (NTCPPhase1)), boost::asio::transfer_all (),
std::bind(&NTCPSession::HandlePhase1Received, shared_from_this (),
std::placeholders::_1, std::placeholders::_2));
ScheduleTermination ();
}
}
@ -558,7 +556,7 @@ namespace transport
m_Handler.Flush ();
}
ScheduleTermination (); // reset termination timer
m_LastActivityTimestamp = i2p::util::GetSecondsSinceEpoch ();
Receive ();
}
}
@ -685,6 +683,7 @@ namespace transport
}
else
{
m_LastActivityTimestamp = i2p::util::GetSecondsSinceEpoch ();
m_NumSentBytes += bytes_transferred;
i2p::transport::transports.UpdateSentBytes (bytes_transferred);
if (!m_SendQueue.empty())
@ -692,8 +691,6 @@ namespace transport
Send (m_SendQueue);
m_SendQueue.clear ();
}
else
ScheduleTermination (); // reset termination timer
}
}
@ -729,28 +726,10 @@ namespace transport
Send (msgs);
}
void NTCPSession::ScheduleTermination ()
{
m_TerminationTimer.cancel ();
m_TerminationTimer.expires_from_now (boost::posix_time::seconds(GetTerminationTimeout ()));
m_TerminationTimer.async_wait (std::bind (&NTCPSession::HandleTerminationTimer,
shared_from_this (), std::placeholders::_1));
}
void NTCPSession::HandleTerminationTimer (const boost::system::error_code& ecode)
{
if (ecode != boost::asio::error::operation_aborted)
{
LogPrint (eLogDebug, "NTCP: No activity for ", GetTerminationTimeout (), " seconds");
//Terminate ();
m_Socket.close ();// invoke Terminate () from HandleReceive
}
}
//-----------------------------------------
NTCPServer::NTCPServer ():
m_IsRunning (false), m_Thread (nullptr), m_Work (m_Service),
m_NTCPAcceptor (nullptr), m_NTCPV6Acceptor (nullptr)
m_TerminationTimer (m_Service), m_NTCPAcceptor (nullptr), m_NTCPV6Acceptor (nullptr)
{
}
@ -810,6 +789,7 @@ namespace transport
}
}
}
ScheduleTermination ();
}
}
@ -820,13 +800,17 @@ namespace transport
if (m_IsRunning)
{
m_IsRunning = false;
if (m_NTCPAcceptor)
delete m_NTCPAcceptor;
m_NTCPAcceptor = nullptr;
if (m_NTCPV6Acceptor)
delete m_NTCPV6Acceptor;
m_NTCPV6Acceptor = nullptr;
m_TerminationTimer.cancel ();
if (m_NTCPAcceptor)
{
delete m_NTCPAcceptor;
m_NTCPAcceptor = nullptr;
}
if (m_NTCPV6Acceptor)
{
delete m_NTCPV6Acceptor;
m_NTCPV6Acceptor = nullptr;
}
m_Service.stop ();
if (m_Thread)
{
@ -989,5 +973,31 @@ namespace transport
m_BanList[addr] = ts + NTCP_BAN_EXPIRATION_TIMEOUT;
LogPrint (eLogWarning, "NTCP: ", addr, " has been banned for ", NTCP_BAN_EXPIRATION_TIMEOUT, " seconds");
}
void NTCPServer::ScheduleTermination ()
{
m_TerminationTimer.expires_from_now (boost::posix_time::seconds(NTCP_TERMINATION_CHECK_TIMEOUT));
m_TerminationTimer.async_wait (std::bind (&NTCPServer::HandleTerminationTimer,
this, std::placeholders::_1));
}
void NTCPServer::HandleTerminationTimer (const boost::system::error_code& ecode)
{
if (ecode != boost::asio::error::operation_aborted)
{
auto ts = i2p::util::GetSecondsSinceEpoch ();
for (auto& it: m_NTCPSessions)
if (it.second->IsTerminationTimeoutExpired (ts))
{
auto session = it.second;
m_Service.post ([session]
{
LogPrint (eLogDebug, "NTCP: No activity for ", session->GetTerminationTimeout (), " seconds");
session->Terminate ();
});
}
ScheduleTermination ();
}
}
}
}

19
NTCPSession.h
View File

@ -37,6 +37,7 @@ namespace transport
const size_t NTCP_MAX_MESSAGE_SIZE = 16384;
const size_t NTCP_BUFFER_SIZE = 4160; // fits 4 tunnel messages (4*1028)
const int NTCP_TERMINATION_TIMEOUT = 120; // 2 minutes
const int NTCP_TERMINATION_CHECK_TIMEOUT = 30; // 30 seconds
const size_t NTCP_DEFAULT_PHASE3_SIZE = 2/*size*/ + i2p::data::DEFAULT_IDENTITY_SIZE/*387*/ + 4/*ts*/ + 15/*padding*/ + 40/*signature*/; // 448
const int NTCP_BAN_EXPIRATION_TIMEOUT = 70; // in second
const int NTCP_CLOCK_SKEW = 60; // in seconds
@ -54,6 +55,8 @@ namespace transport
boost::asio::ip::tcp::socket& GetSocket () { return m_Socket; };
bool IsEstablished () const { return m_IsEstablished; };
bool IsTerminationTimeoutExpired (uint64_t ts) const
{ return ts >= m_LastActivityTimestamp + GetTerminationTimeout (); };
void ClientLogin ();
void ServerLogin ();
@ -95,17 +98,12 @@ namespace transport
void Send (const std::vector<std::shared_ptr<I2NPMessage> >& msgs);
void HandleSent (const boost::system::error_code& ecode, std::size_t bytes_transferred, std::vector<std::shared_ptr<I2NPMessage> > msgs);
// timer
void ScheduleTermination ();
void HandleTerminationTimer (const boost::system::error_code& ecode);
private:
NTCPServer& m_Server;
boost::asio::ip::tcp::socket m_Socket;
boost::asio::deadline_timer m_TerminationTimer;
bool m_IsEstablished, m_IsTerminated;
uint64_t m_LastActivityTimestamp;
i2p::crypto::CBCDecryption m_Decryption;
i2p::crypto::CBCEncryption m_Encryption;
@ -146,8 +144,8 @@ namespace transport
std::shared_ptr<NTCPSession> FindNTCPSession (const i2p::data::IdentHash& ident);
void Connect (const boost::asio::ip::address& address, int port, std::shared_ptr<NTCPSession> conn);
bool IsBoundV4() const { return m_NTCPAcceptor != nullptr; };
bool IsBoundV6() const { return m_NTCPV6Acceptor != nullptr; };
bool IsBoundV4() const { return m_NTCPAcceptor != nullptr; };
bool IsBoundV6() const { return m_NTCPV6Acceptor != nullptr; };
boost::asio::io_service& GetService () { return m_Service; };
void Ban (const boost::asio::ip::address& addr);
@ -160,12 +158,17 @@ namespace transport
void HandleConnect (const boost::system::error_code& ecode, std::shared_ptr<NTCPSession> conn);
// timer
void ScheduleTermination ();
void HandleTerminationTimer (const boost::system::error_code& ecode);
private:
bool m_IsRunning;
std::thread * m_Thread;
boost::asio::io_service m_Service;
boost::asio::io_service::work m_Work;
boost::asio::deadline_timer m_TerminationTimer;
boost::asio::ip::tcp::acceptor * m_NTCPAcceptor, * m_NTCPV6Acceptor;
std::map<i2p::data::IdentHash, std::shared_ptr<NTCPSession> > m_NTCPSessions; // access from m_Thread only
std::map<boost::asio::ip::address, uint32_t> m_BanList; // IP -> ban expiration time in seconds