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https://github.com/PurpleI2P/i2pd.git
synced 2025-11-14 05:20:10 +00:00
ack timer for UDP server tunnel session
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orignal
parent
5b8c5a5eff
commit
cfcd0261c3
2 changed files with 65 additions and 50 deletions
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@ -148,8 +148,18 @@ namespace client
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return s;
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}
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void UDPConnection::Stop ()
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{
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m_AckTimer.cancel ();
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}
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void UDPConnection::Acked (uint32_t seqn)
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{
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if (m_AckTimerSeqn && seqn >= m_AckTimerSeqn)
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{
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m_AckTimerSeqn = 0;
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m_AckTimer.cancel ();
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}
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if (m_UnackedDatagrams.empty () && seqn < m_UnackedDatagrams.front ().first) return;
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auto it = m_UnackedDatagrams.begin ();
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while (it != m_UnackedDatagrams.end ())
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@ -164,16 +174,42 @@ namespace client
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}
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m_UnackedDatagrams.erase (m_UnackedDatagrams.begin (), it);
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}
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void UDPConnection::ScheduleAckTimer (uint32_t seqn)
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{
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if (!m_AckTimerSeqn)
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{
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m_AckTimerSeqn = seqn;
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m_AckTimer.expires_from_now (boost::posix_time::milliseconds (m_RTT ? 2*m_RTT : I2P_UDP_MAX_UNACKED_DATAGRAM_TIME));
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m_AckTimer.async_wait ([this](const boost::system::error_code& ecode)
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{
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if (ecode != boost::asio::error::operation_aborted)
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{
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LogPrint (eLogInfo, "UDP Connection: Packet ", m_AckTimerSeqn, " was not acked");
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m_AckTimerSeqn = 0;
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m_RTT = 0;
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// send empty packet with reset path flag
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i2p::util::Mapping options;
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options.Put (UDP_SESSION_FLAGS, UDP_SESSION_FLAG_RESET_PATH | UDP_SESSION_FLAG_ACK_REQUESTED);
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auto session = GetDatagramSession ();
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session->DropSharedRoutingPath ();
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GetDatagramDestination ()->SendDatagram (session, nullptr, 0, 0, 0, &options);
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}
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});
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}
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}
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UDPSession::UDPSession(boost::asio::ip::udp::endpoint localEndpoint,
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const std::shared_ptr<i2p::client::ClientDestination> & localDestination,
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const boost::asio::ip::udp::endpoint& endpoint, const i2p::data::IdentHash& to,
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uint16_t ourPort, uint16_t theirPort) :
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UDPConnection (localDestination->GetService()),
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m_Destination(localDestination->GetDatagramDestination()),
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IPSocket(localDestination->GetService(), localEndpoint), Identity (to),
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SendEndpoint(endpoint), LastActivity(i2p::util::GetMillisecondsSinceEpoch()),
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LocalPort(ourPort), RemotePort(theirPort)
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{
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Start ();
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IPSocket.set_option (boost::asio::socket_base::receive_buffer_size (I2P_UDP_MAX_MTU ));
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IPSocket.non_blocking (true);
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Receive();
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@ -200,11 +236,12 @@ namespace client
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if (session->GetVersion () == i2p::datagram::eDatagramV3)
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{
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uint8_t flags = 0;
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if (!m_RTT || (!m_UnackedDatagrams.empty () &&
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if (!m_RTT || !m_AckTimerSeqn || (!m_UnackedDatagrams.empty () &&
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ts > m_UnackedDatagrams.back ().second + repliableDatagramInterval)) // last ack request
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{
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flags |= UDP_SESSION_FLAG_ACK_REQUESTED;
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m_UnackedDatagrams.push_back ({ m_NextSendPacketNum, ts });
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ScheduleAckTimer (m_NextSendPacketNum);
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}
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i2p::util::Mapping options;
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options.Put (UDP_SESSION_SEQN, m_NextSendPacketNum);
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@ -213,6 +250,7 @@ namespace client
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if (flags)
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options.Put (UDP_SESSION_FLAGS, flags);
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m_Destination->SendDatagram(session, m_Buffer, len, LocalPort, RemotePort, &options);
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ScheduleAckTimer (m_NextSendPacketNum);
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}
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else
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m_Destination->SendDatagram(session, m_Buffer, len, LocalPort, RemotePort);
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@ -286,6 +324,7 @@ namespace client
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dgram->ResetReceiver (m_inPort);
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dgram->ResetRawReceiver (m_inPort);
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}
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m_Sessions.clear ();
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}
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std::vector<std::shared_ptr<DatagramSessionInfo> > I2PUDPServerTunnel::GetSessions ()
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@ -315,10 +354,10 @@ namespace client
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const boost::asio::ip::udp::endpoint& localEndpoint,
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std::shared_ptr<i2p::client::ClientDestination> localDestination,
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uint16_t remotePort, bool gzip, i2p::datagram::DatagramVersion datagramVersion) :
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UDPConnection (localDestination->GetService ()),
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m_Name (name), m_RemoteDest (remoteDest), m_LocalDest (localDestination), m_LocalEndpoint (localEndpoint),
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m_ResolveThread (nullptr), m_LocalSocket (nullptr), RemotePort (remotePort),
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m_LastPort (0), m_cancel_resolve (false), m_Gzip (gzip), m_DatagramVersion (datagramVersion),
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m_AckTimer (localDestination->GetService ()), m_AckTimerSeqn (0)
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m_LastPort (0), m_cancel_resolve (false), m_Gzip (gzip), m_DatagramVersion (datagramVersion)
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{
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}
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@ -329,6 +368,7 @@ namespace client
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void I2PUDPClientTunnel::Start ()
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{
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UDPConnection::Start ();
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// Reset flag in case of tunnel reload
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if (m_cancel_resolve) m_cancel_resolve = false;
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@ -376,7 +416,7 @@ namespace client
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m_ResolveThread = nullptr;
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}
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m_RemoteAddr = nullptr;
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m_AckTimer.cancel ();
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UDPConnection::Stop ();
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}
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void I2PUDPClientTunnel::RecvFromLocal ()
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@ -438,6 +478,7 @@ namespace client
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{
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flags |= UDP_SESSION_FLAG_ACK_REQUESTED;
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m_UnackedDatagrams.push_back ({ m_NextSendPacketNum, ts });
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ScheduleAckTimer (m_NextSendPacketNum);
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}
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i2p::util::Mapping options;
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options.Put (UDP_SESSION_SEQN, m_NextSendPacketNum);
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@ -446,7 +487,6 @@ namespace client
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if (flags)
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options.Put (UDP_SESSION_FLAGS, flags);
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m_LocalDest->GetDatagramDestination ()->SendDatagram (session, m_RecvBuff, transferred, remotePort, RemotePort, &options);
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ScheduleAckTimer (m_NextSendPacketNum);
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}
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else
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m_LocalDest->GetDatagramDestination ()->SendDatagram (session, m_RecvBuff, transferred, remotePort, RemotePort);
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@ -567,40 +607,5 @@ namespace client
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else
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LogPrint (eLogWarning, "UDP Client: Not tracking udp session using port ", (int) toPort);
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}
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void I2PUDPClientTunnel::Acked (uint32_t seqn)
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{
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if (m_AckTimerSeqn && seqn >= m_AckTimerSeqn)
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{
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m_AckTimerSeqn = 0;
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m_AckTimer.cancel ();
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}
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UDPConnection::Acked (seqn);
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}
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void I2PUDPClientTunnel::ScheduleAckTimer (uint32_t seqn)
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{
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if (!m_AckTimerSeqn)
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{
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m_AckTimerSeqn = seqn;
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m_AckTimer.expires_from_now (boost::posix_time::milliseconds (m_RTT ? 2*m_RTT : I2P_UDP_MAX_UNACKED_DATAGRAM_TIME));
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m_AckTimer.async_wait ([this](const boost::system::error_code& ecode)
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{
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if (ecode != boost::asio::error::operation_aborted)
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{
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LogPrint (eLogInfo, "UDP Client: Packet ", m_AckTimerSeqn, " was not acked");
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m_AckTimerSeqn = 0;
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m_RTT = 0;
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// send empty packet with reset path flag
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i2p::util::Mapping options;
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options.Put (UDP_SESSION_FLAGS, UDP_SESSION_FLAG_RESET_PATH | UDP_SESSION_FLAG_ACK_REQUESTED);
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auto session = GetDatagramSession ();
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session->DropSharedRoutingPath ();
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m_LocalDest->GetDatagramDestination ()->SendDatagram (session, nullptr, 0, 0, 0, &options);
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}
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});
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}
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}
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}
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}
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