mirror of
https://github.com/facebookincubator/mvfst.git
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c47c3cf5c6
Differential Revision: D23283619 fbshipit-source-id: b7fe31871dad5711016234a2d10ae84edc4fd24c
1601 lines
58 KiB
C++
1601 lines
58 KiB
C++
/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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*/
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#include <quic/client/QuicClientTransport.h>
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#include <folly/portability/Sockets.h>
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#include <quic/api/LoopDetectorCallback.h>
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#include <quic/api/QuicTransportFunctions.h>
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#include <quic/client/handshake/ClientHandshakeFactory.h>
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#include <quic/client/handshake/ClientTransportParametersExtension.h>
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#include <quic/client/state/ClientStateMachine.h>
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#include <quic/flowcontrol/QuicFlowController.h>
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#include <quic/handshake/CryptoFactory.h>
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#include <quic/happyeyeballs/QuicHappyEyeballsFunctions.h>
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#include <quic/logging/QLoggerConstants.h>
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#include <quic/loss/QuicLossFunctions.h>
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#include <quic/state/AckHandlers.h>
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#include <quic/state/QuicPacingFunctions.h>
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#include <quic/state/SimpleFrameFunctions.h>
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#include <quic/state/stream/StreamReceiveHandlers.h>
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#include <quic/state/stream/StreamSendHandlers.h>
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namespace fsp = folly::portability::sockets;
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namespace quic {
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using PacketDropReason = QuicTransportStatsCallback::PacketDropReason;
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QuicClientTransport::QuicClientTransport(
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folly::EventBase* evb,
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std::unique_ptr<folly::AsyncUDPSocket> socket,
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std::shared_ptr<ClientHandshakeFactory> handshakeFactory,
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size_t connectionIdSize)
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: QuicTransportBase(evb, std::move(socket)),
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happyEyeballsConnAttemptDelayTimeout_(this) {
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DCHECK(handshakeFactory);
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auto tempConn =
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std::make_unique<QuicClientConnectionState>(std::move(handshakeFactory));
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clientConn_ = tempConn.get();
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conn_.reset(tempConn.release());
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auto srcConnId = connectionIdSize > 0
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? ConnectionId::createRandom(connectionIdSize)
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: ConnectionId(std::vector<uint8_t>());
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conn_->clientConnectionId = srcConnId;
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conn_->readCodec = std::make_unique<QuicReadCodec>(QuicNodeType::Client);
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conn_->readCodec->setClientConnectionId(srcConnId);
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conn_->selfConnectionIds.emplace_back(srcConnId, kInitialSequenceNumber);
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clientConn_->initialDestinationConnectionId =
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ConnectionId::createRandom(kMinInitialDestinationConnIdLength);
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VLOG(4) << "initial dcid: "
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<< clientConn_->initialDestinationConnectionId->hex();
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conn_->readCodec->setCodecParameters(CodecParameters(
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conn_->peerAckDelayExponent, conn_->originalVersion.value()));
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// TODO: generate this once we can generate the packet sequence number
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// correctly.
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// conn_->nextSequenceNum = folly::Random::secureRandom<PacketNum>();
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VLOG(10) << "client created " << *conn_;
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}
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QuicClientTransport::~QuicClientTransport() {
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VLOG(10) << "Destroyed connection to server=" << conn_->peerAddress;
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// The caller probably doesn't need the conn callback after destroying the
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// transport.
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connCallback_ = nullptr;
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// Close without draining.
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closeImpl(
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std::make_pair(
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QuicErrorCode(LocalErrorCode::SHUTTING_DOWN),
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std::string("Closing from client destructor")),
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false);
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if (conn_->happyEyeballsState.secondSocket) {
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auto sock = std::move(conn_->happyEyeballsState.secondSocket);
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sock->pauseRead();
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sock->close();
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}
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}
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void QuicClientTransport::processUDPData(
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const folly::SocketAddress& peer,
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NetworkDataSingle&& networkData) {
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BufQueue udpData;
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udpData.append(std::move(networkData.data));
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if (!conn_->version) {
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// We only check for version negotiation packets before the version
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// is negotiated.
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auto versionNegotiation =
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conn_->readCodec->tryParsingVersionNegotiation(udpData);
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if (versionNegotiation) {
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VLOG(4) << "Got version negotiation packet from peer=" << peer
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<< " versions=" << std::hex << versionNegotiation->versions << " "
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<< *this;
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throw QuicInternalException(
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"Received version negotiation packet",
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LocalErrorCode::CONNECTION_ABANDONED);
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}
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}
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for (uint16_t processedPackets = 0;
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!udpData.empty() && processedPackets < kMaxNumCoalescedPackets;
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processedPackets++) {
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processPacketData(peer, networkData.receiveTimePoint, udpData);
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}
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VLOG_IF(4, !udpData.empty())
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<< "Leaving " << udpData.chainLength()
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<< " bytes unprocessed after attempting to process "
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<< kMaxNumCoalescedPackets << " packets.";
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}
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void QuicClientTransport::processPacketData(
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const folly::SocketAddress& peer,
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TimePoint receiveTimePoint,
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BufQueue& packetQueue) {
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auto packetSize = packetQueue.chainLength();
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if (packetSize == 0) {
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return;
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}
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auto parsedPacket = conn_->readCodec->parsePacket(
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packetQueue, conn_->ackStates, conn_->clientConnectionId->size());
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StatelessReset* statelessReset = parsedPacket.statelessReset();
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if (statelessReset) {
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auto& token = clientConn_->statelessResetToken;
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if (statelessReset->token == token) {
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VLOG(4) << "Received Stateless Reset " << *this;
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conn_->peerConnectionError = std::make_pair(
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QuicErrorCode(LocalErrorCode::CONNECTION_RESET),
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toString(LocalErrorCode::CONNECTION_RESET).str());
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throw QuicInternalException("Peer reset", LocalErrorCode::NO_ERROR);
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}
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VLOG(4) << "Drop StatelessReset for bad connId or token " << *this;
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}
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RetryPacket* retryPacket = parsedPacket.retryPacket();
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if (retryPacket) {
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if (conn_->qLogger) {
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conn_->qLogger->addPacket(*retryPacket, packetSize, true);
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}
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if (!clientConn_->retryToken.empty()) {
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VLOG(4) << "Server sent more than one retry packet";
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return;
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}
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const ConnectionId* originalDstConnId =
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&(*clientConn_->initialDestinationConnectionId);
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if (!clientConn_->clientHandshakeLayer->verifyRetryIntegrityTag(
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*originalDstConnId, *retryPacket)) {
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VLOG(4) << "The integrity tag in the retry packet was invalid. "
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<< "Dropping bad retry packet.";
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return;
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}
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// Set the destination connection ID to be the value from the source
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// connection id of the retry packet
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clientConn_->initialDestinationConnectionId =
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retryPacket->header.getSourceConnId();
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auto released = static_cast<QuicClientConnectionState*>(conn_.release());
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std::unique_ptr<QuicClientConnectionState> uniqueClient(released);
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auto tempConn = undoAllClientStateForRetry(std::move(uniqueClient));
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clientConn_ = tempConn.get();
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conn_.reset(tempConn.release());
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clientConn_->retryToken = retryPacket->header.getToken();
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// TODO (amsharma): add a "RetryPacket" QLog event, and log it here.
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// TODO (amsharma): verify the "original_connection_id" parameter
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// upon receiving a subsequent initial from the server.
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startCryptoHandshake();
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return;
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}
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RegularQuicPacket* regularOptional = parsedPacket.regularPacket();
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if (!regularOptional) {
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QUIC_STATS(statsCallback_, onPacketDropped, PacketDropReason::PARSE_ERROR);
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if (conn_->qLogger) {
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conn_->qLogger->addPacketDrop(packetSize, kParse);
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}
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QUIC_TRACE(packet_drop, *conn_, "parse");
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return;
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}
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if (happyEyeballsEnabled_) {
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happyEyeballsOnDataReceived(
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*conn_, happyEyeballsConnAttemptDelayTimeout_, socket_, peer);
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}
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LongHeader* longHeader = regularOptional->header.asLong();
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ShortHeader* shortHeader = regularOptional->header.asShort();
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auto protectionLevel = regularOptional->header.getProtectionType();
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auto encryptionLevel = protectionTypeToEncryptionLevel(protectionLevel);
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auto packetNum = regularOptional->header.getPacketSequenceNum();
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auto pnSpace = regularOptional->header.getPacketNumberSpace();
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bool isProtectedPacket = protectionLevel == ProtectionType::KeyPhaseZero ||
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protectionLevel == ProtectionType::KeyPhaseOne;
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auto& regularPacket = *regularOptional;
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if (conn_->qLogger) {
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conn_->qLogger->addPacket(regularPacket, packetSize);
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}
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if (!isProtectedPacket) {
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for (auto& quicFrame : regularPacket.frames) {
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auto isPadding = quicFrame.asPaddingFrame();
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auto isAck = quicFrame.asReadAckFrame();
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auto isClose = quicFrame.asConnectionCloseFrame();
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auto isCrypto = quicFrame.asReadCryptoFrame();
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auto isPing = quicFrame.asPingFrame();
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// TODO: add path challenge and response
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if (!isPadding && !isAck && !isClose && !isCrypto && !isPing) {
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throw QuicTransportException(
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"Invalid frame", TransportErrorCode::PROTOCOL_VIOLATION);
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}
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}
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}
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// We got a packet that was not the version negotiation packet, that means
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// that the version is now bound to the new packet.
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// TODO: move this into the state machine.
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// TODO: get this from the crypto layer instead. This would be a security vuln
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// if we don't.
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if (!conn_->version) {
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conn_->version = conn_->originalVersion;
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}
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if (!conn_->serverConnectionId && longHeader) {
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conn_->serverConnectionId = longHeader->getSourceConnId();
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conn_->peerConnectionIds.emplace_back(
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longHeader->getSourceConnId(), kInitialSequenceNumber);
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conn_->readCodec->setServerConnectionId(*conn_->serverConnectionId);
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}
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// Error out if the connection id on the packet is not the one that is
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// expected.
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bool connidMatched = true;
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if (longHeader &&
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longHeader->getDestinationConnId() != *conn_->clientConnectionId) {
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connidMatched = false;
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} else if (
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shortHeader &&
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shortHeader->getConnectionId() != *conn_->clientConnectionId) {
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connidMatched = false;
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}
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if (!connidMatched) {
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throw QuicTransportException(
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"Invalid connection id", TransportErrorCode::PROTOCOL_VIOLATION);
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}
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auto& ackState = getAckState(*conn_, pnSpace);
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auto outOfOrder =
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updateLargestReceivedPacketNum(ackState, packetNum, receiveTimePoint);
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bool pktHasRetransmittableData = false;
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bool pktHasCryptoData = false;
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for (auto& quicFrame : regularPacket.frames) {
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switch (quicFrame.type()) {
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case QuicFrame::Type::ReadAckFrame_E: {
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VLOG(10) << "Client received ack frame in packet=" << packetNum << " "
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<< *this;
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ReadAckFrame& ackFrame = *quicFrame.asReadAckFrame();
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processAckFrame(
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*conn_,
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pnSpace,
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ackFrame,
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[&](const OutstandingPacket& outstandingPacket,
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const QuicWriteFrame& packetFrame,
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const ReadAckFrame&) {
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auto outstandingProtectionType =
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outstandingPacket.packet.header.getProtectionType();
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if (outstandingProtectionType == ProtectionType::KeyPhaseZero) {
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// If we received an ack for data that we sent in 1-rtt from
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// the server, we can assume that the server had successfully
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// derived the 1-rtt keys and hence received the client
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// finished message. We can mark the handshake as confirmed and
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// drop the handshake cipher and outstanding packets after the
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// processing loop.
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if (conn_->handshakeWriteCipher) {
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conn_->handshakeLayer->handshakeConfirmed();
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}
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// TODO reap
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if (*conn_->version == QuicVersion::MVFST_D24) {
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cancelHandshakeCryptoStreamRetransmissions(
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*conn_->cryptoState);
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}
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}
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switch (packetFrame.type()) {
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case QuicWriteFrame::Type::WriteAckFrame_E: {
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const WriteAckFrame& frame = *packetFrame.asWriteAckFrame();
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DCHECK(!frame.ackBlocks.empty());
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VLOG(4) << "Client received ack for largestAcked="
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<< frame.ackBlocks.front().end << " " << *this;
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commonAckVisitorForAckFrame(ackState, frame);
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break;
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}
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case QuicWriteFrame::Type::RstStreamFrame_E: {
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const RstStreamFrame& frame = *packetFrame.asRstStreamFrame();
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VLOG(4) << "Client received ack for reset frame stream="
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<< frame.streamId << " " << *this;
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auto stream = conn_->streamManager->getStream(frame.streamId);
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if (stream) {
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sendRstAckSMHandler(*stream);
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}
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break;
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}
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case QuicWriteFrame::Type::WriteStreamFrame_E: {
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const WriteStreamFrame& frame =
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*packetFrame.asWriteStreamFrame();
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auto ackedStream =
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conn_->streamManager->getStream(frame.streamId);
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VLOG(4) << "Client got ack for stream=" << frame.streamId
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<< " offset=" << frame.offset << " fin=" << frame.fin
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<< " data=" << frame.len
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<< " closed=" << (ackedStream == nullptr) << " "
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<< *this;
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if (ackedStream) {
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sendAckSMHandler(*ackedStream, frame);
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}
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break;
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}
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case QuicWriteFrame::Type::WriteCryptoFrame_E: {
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const WriteCryptoFrame& frame =
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*packetFrame.asWriteCryptoFrame();
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auto cryptoStream = getCryptoStream(
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*conn_->cryptoState,
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protectionTypeToEncryptionLevel(
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outstandingProtectionType));
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processCryptoStreamAck(
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*cryptoStream, frame.offset, frame.len);
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break;
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}
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case QuicWriteFrame::Type::PingFrame_E:
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conn_->pendingEvents.cancelPingTimeout = true;
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break;
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case QuicWriteFrame::Type::QuicSimpleFrame_E:
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default:
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// ignore other frames.
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break;
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}
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},
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markPacketLoss,
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receiveTimePoint);
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break;
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}
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case QuicFrame::Type::RstStreamFrame_E: {
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RstStreamFrame& frame = *quicFrame.asRstStreamFrame();
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VLOG(10) << "Client received reset stream=" << frame.streamId << " "
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<< *this;
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pktHasRetransmittableData = true;
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auto streamId = frame.streamId;
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auto stream = conn_->streamManager->getStream(streamId);
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if (!stream) {
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break;
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}
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receiveRstStreamSMHandler(*stream, std::move(frame));
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break;
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}
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case QuicFrame::Type::ReadCryptoFrame_E: {
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pktHasRetransmittableData = true;
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pktHasCryptoData = true;
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ReadCryptoFrame& cryptoFrame = *quicFrame.asReadCryptoFrame();
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VLOG(10) << "Client received crypto data offset=" << cryptoFrame.offset
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<< " len=" << cryptoFrame.data->computeChainDataLength()
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<< " packetNum=" << packetNum << " " << *this;
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appendDataToReadBuffer(
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*getCryptoStream(*conn_->cryptoState, encryptionLevel),
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StreamBuffer(
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std::move(cryptoFrame.data), cryptoFrame.offset, false));
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break;
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}
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case QuicFrame::Type::ReadStreamFrame_E: {
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ReadStreamFrame& frame = *quicFrame.asReadStreamFrame();
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VLOG(10) << "Client received stream data for stream=" << frame.streamId
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<< " offset=" << frame.offset
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<< " len=" << frame.data->computeChainDataLength()
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<< " fin=" << frame.fin << " packetNum=" << packetNum << " "
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<< *this;
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auto stream = conn_->streamManager->getStream(frame.streamId);
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pktHasRetransmittableData = true;
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if (!stream) {
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VLOG(10) << "Could not find stream=" << frame.streamId << " "
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<< *conn_;
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break;
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}
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receiveReadStreamFrameSMHandler(*stream, std::move(frame));
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break;
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}
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case QuicFrame::Type::MaxDataFrame_E: {
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MaxDataFrame& connWindowUpdate = *quicFrame.asMaxDataFrame();
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VLOG(10) << "Client received max data offset="
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<< connWindowUpdate.maximumData << " " << *this;
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pktHasRetransmittableData = true;
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handleConnWindowUpdate(*conn_, connWindowUpdate, packetNum);
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break;
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}
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case QuicFrame::Type::MaxStreamDataFrame_E: {
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MaxStreamDataFrame& streamWindowUpdate =
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*quicFrame.asMaxStreamDataFrame();
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VLOG(10) << "Client received max stream data stream="
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<< streamWindowUpdate.streamId
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<< " offset=" << streamWindowUpdate.maximumData << " "
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<< *this;
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if (isReceivingStream(conn_->nodeType, streamWindowUpdate.streamId)) {
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throw QuicTransportException(
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"Received MaxStreamDataFrame for receiving stream.",
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TransportErrorCode::STREAM_STATE_ERROR);
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}
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pktHasRetransmittableData = true;
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auto stream =
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conn_->streamManager->getStream(streamWindowUpdate.streamId);
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if (stream) {
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handleStreamWindowUpdate(
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*stream, streamWindowUpdate.maximumData, packetNum);
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}
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break;
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}
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case QuicFrame::Type::DataBlockedFrame_E: {
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VLOG(10) << "Client received blocked " << *this;
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pktHasRetransmittableData = true;
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handleConnBlocked(*conn_);
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break;
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}
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case QuicFrame::Type::StreamDataBlockedFrame_E: {
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// peer wishes to send data, but is unable to due to stream-level flow
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// control
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StreamDataBlockedFrame& blocked = *quicFrame.asStreamDataBlockedFrame();
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VLOG(10) << "Client received blocked stream=" << blocked.streamId << " "
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<< *this;
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pktHasRetransmittableData = true;
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auto stream = conn_->streamManager->getStream(blocked.streamId);
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if (stream) {
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handleStreamBlocked(*stream);
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}
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break;
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}
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case QuicFrame::Type::StreamsBlockedFrame_E: {
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// peer wishes to open a stream, but is unable to due to the maximum
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// stream limit set by us
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StreamsBlockedFrame& blocked = *quicFrame.asStreamsBlockedFrame();
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VLOG(10) << "Client received stream blocked limit="
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<< blocked.streamLimit << " " << *this;
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// TODO implement handler for it
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break;
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}
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case QuicFrame::Type::ConnectionCloseFrame_E: {
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ConnectionCloseFrame& connFrame = *quicFrame.asConnectionCloseFrame();
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auto errMsg = folly::to<std::string>(
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"Client closed by peer reason=", connFrame.reasonPhrase);
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VLOG(4) << errMsg << " " << *this;
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// we want to deliver app callbacks with the peer supplied error,
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// but send a NO_ERROR to the peer.
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if (conn_->qLogger) {
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conn_->qLogger->addTransportStateUpdate(getPeerClose(errMsg));
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}
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QUIC_TRACE(recvd_close, *conn_, errMsg.c_str());
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conn_->peerConnectionError = std::make_pair(
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QuicErrorCode(connFrame.errorCode), std::move(errMsg));
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throw QuicTransportException(
|
|
"Peer closed", TransportErrorCode::NO_ERROR);
|
|
break;
|
|
}
|
|
case QuicFrame::Type::PingFrame_E:
|
|
// Ping isn't retransmittable. But we would like to ack them early.
|
|
pktHasRetransmittableData = true;
|
|
break;
|
|
case QuicFrame::Type::PaddingFrame_E:
|
|
break;
|
|
case QuicFrame::Type::QuicSimpleFrame_E: {
|
|
QuicSimpleFrame& simpleFrame = *quicFrame.asQuicSimpleFrame();
|
|
pktHasRetransmittableData = true;
|
|
updateSimpleFrameOnPacketReceived(
|
|
*conn_, simpleFrame, packetNum, false);
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
auto handshakeLayer = clientConn_->clientHandshakeLayer;
|
|
if (handshakeLayer->getPhase() == ClientHandshake::Phase::Established &&
|
|
*conn_->version != QuicVersion::MVFST_D24) {
|
|
handshakeConfirmed(*conn_);
|
|
}
|
|
|
|
// Try reading bytes off of crypto, and performing a handshake.
|
|
auto cryptoData = readDataFromCryptoStream(
|
|
*getCryptoStream(*conn_->cryptoState, encryptionLevel));
|
|
if (cryptoData) {
|
|
bool hadOneRttKey = conn_->oneRttWriteCipher != nullptr;
|
|
handshakeLayer->doHandshake(std::move(cryptoData), encryptionLevel);
|
|
bool oneRttKeyDerivationTriggered = false;
|
|
if (!hadOneRttKey && conn_->oneRttWriteCipher) {
|
|
oneRttKeyDerivationTriggered = true;
|
|
updatePacingOnKeyEstablished(*conn_);
|
|
}
|
|
if (conn_->oneRttWriteCipher && conn_->readCodec->getOneRttReadCipher() &&
|
|
conn_->version != QuicVersion::MVFST_D24) {
|
|
conn_->zeroRttWriteCipher.reset();
|
|
conn_->zeroRttWriteHeaderCipher.reset();
|
|
}
|
|
auto zeroRttRejected = handshakeLayer->getZeroRttRejected();
|
|
if (zeroRttRejected.has_value() && *zeroRttRejected) {
|
|
if (conn_->qLogger) {
|
|
conn_->qLogger->addTransportStateUpdate(kZeroRttRejected);
|
|
}
|
|
QUIC_TRACE(zero_rtt, *conn_, "rejected");
|
|
handshakeLayer->removePsk(hostname_);
|
|
} else if (zeroRttRejected.has_value()) {
|
|
if (conn_->qLogger) {
|
|
conn_->qLogger->addTransportStateUpdate(kZeroRttAccepted);
|
|
}
|
|
QUIC_TRACE(zero_rtt, *conn_, "accepted");
|
|
}
|
|
// We should get transport parameters if we've derived 1-rtt keys and 0-rtt
|
|
// was rejected, or we have derived 1-rtt keys and 0-rtt was never
|
|
// attempted.
|
|
if ((oneRttKeyDerivationTriggered &&
|
|
((zeroRttRejected.has_value() && *zeroRttRejected) ||
|
|
!zeroRttRejected.has_value()))) {
|
|
auto originalPeerMaxOffset =
|
|
conn_->flowControlState.peerAdvertisedMaxOffset;
|
|
auto originalPeerInitialStreamOffsetBidiLocal =
|
|
conn_->flowControlState.peerAdvertisedInitialMaxStreamOffsetBidiLocal;
|
|
auto originalPeerInitialStreamOffsetBidiRemote =
|
|
conn_->flowControlState
|
|
.peerAdvertisedInitialMaxStreamOffsetBidiRemote;
|
|
auto originalPeerInitialStreamOffsetUni =
|
|
conn_->flowControlState.peerAdvertisedInitialMaxStreamOffsetUni;
|
|
VLOG(10) << "Client negotiated transport params " << *this;
|
|
auto serverParams = handshakeLayer->getServerTransportParams();
|
|
if (!serverParams) {
|
|
throw QuicTransportException(
|
|
"No server transport params",
|
|
TransportErrorCode::TRANSPORT_PARAMETER_ERROR);
|
|
}
|
|
auto maxStreamsBidi = getIntegerParameter(
|
|
TransportParameterId::initial_max_streams_bidi,
|
|
serverParams->parameters);
|
|
auto maxStreamsUni = getIntegerParameter(
|
|
TransportParameterId::initial_max_streams_uni,
|
|
serverParams->parameters);
|
|
processServerInitialParams(
|
|
*clientConn_, std::move(*serverParams), packetNum);
|
|
|
|
cacheServerInitialParams(
|
|
*clientConn_,
|
|
conn_->flowControlState.peerAdvertisedMaxOffset,
|
|
conn_->flowControlState.peerAdvertisedInitialMaxStreamOffsetBidiLocal,
|
|
conn_->flowControlState
|
|
.peerAdvertisedInitialMaxStreamOffsetBidiRemote,
|
|
conn_->flowControlState.peerAdvertisedInitialMaxStreamOffsetUni,
|
|
maxStreamsBidi.value_or(0),
|
|
maxStreamsUni.value_or(0));
|
|
|
|
auto& statelessResetToken = clientConn_->statelessResetToken;
|
|
if (statelessResetToken) {
|
|
conn_->readCodec->setStatelessResetToken(*statelessResetToken);
|
|
}
|
|
if (zeroRttRejected.has_value() && *zeroRttRejected) {
|
|
// verify that the new flow control parameters are >= the original
|
|
// transport parameters that were use. This is the easy case. If the
|
|
// flow control decreases then we are just screwed and we need to have
|
|
// the app retry the connection. The other parameters can be updated.
|
|
// TODO: implement undo transport state on retry.
|
|
if (originalPeerMaxOffset >
|
|
conn_->flowControlState.peerAdvertisedMaxOffset ||
|
|
originalPeerInitialStreamOffsetBidiLocal >
|
|
conn_->flowControlState
|
|
.peerAdvertisedInitialMaxStreamOffsetBidiLocal ||
|
|
originalPeerInitialStreamOffsetBidiRemote >
|
|
conn_->flowControlState
|
|
.peerAdvertisedInitialMaxStreamOffsetBidiRemote ||
|
|
|
|
originalPeerInitialStreamOffsetUni >
|
|
conn_->flowControlState
|
|
.peerAdvertisedInitialMaxStreamOffsetUni) {
|
|
throw QuicTransportException(
|
|
"Rejection of zero rtt parameters unsupported",
|
|
TransportErrorCode::TRANSPORT_PARAMETER_ERROR);
|
|
}
|
|
}
|
|
}
|
|
if (zeroRttRejected.has_value() && *zeroRttRejected) {
|
|
// TODO: Make sure the alpn is the same, if not then do a full undo of the
|
|
// state.
|
|
clientConn_->zeroRttWriteCipher.reset();
|
|
clientConn_->zeroRttWriteHeaderCipher.reset();
|
|
markZeroRttPacketsLost(*conn_, markPacketLoss);
|
|
}
|
|
}
|
|
// TODO this is incorrect and needs to be removed post MVFST_D24
|
|
if (conn_->version == QuicVersion::MVFST_D24 &&
|
|
(protectionLevel == ProtectionType::KeyPhaseZero ||
|
|
protectionLevel == ProtectionType::KeyPhaseOne)) {
|
|
DCHECK(conn_->oneRttWriteCipher);
|
|
clientConn_->clientHandshakeLayer->handshakeConfirmed();
|
|
conn_->readCodec->onHandshakeDone(receiveTimePoint);
|
|
}
|
|
updateAckSendStateOnRecvPacket(
|
|
*conn_,
|
|
ackState,
|
|
outOfOrder,
|
|
pktHasRetransmittableData,
|
|
pktHasCryptoData);
|
|
if (encryptionLevel == EncryptionLevel::Handshake &&
|
|
conn_->version != QuicVersion::MVFST_D24 && conn_->initialWriteCipher) {
|
|
conn_->initialWriteCipher.reset();
|
|
conn_->initialHeaderCipher.reset();
|
|
conn_->readCodec->setInitialReadCipher(nullptr);
|
|
conn_->readCodec->setInitialHeaderCipher(nullptr);
|
|
implicitAckCryptoStream(*conn_, EncryptionLevel::Initial);
|
|
}
|
|
}
|
|
|
|
void QuicClientTransport::onReadData(
|
|
const folly::SocketAddress& peer,
|
|
NetworkDataSingle&& networkData) {
|
|
if (closeState_ == CloseState::CLOSED) {
|
|
// If we are closed, then we shoudn't process new network data.
|
|
// TODO: we might want to process network data if we decide that we should
|
|
// exit draining state early
|
|
QUIC_STATS(
|
|
statsCallback_, onPacketDropped, PacketDropReason::CLIENT_STATE_CLOSED);
|
|
if (conn_->qLogger) {
|
|
conn_->qLogger->addPacketDrop(0, kAlreadyClosed);
|
|
}
|
|
QUIC_TRACE(packet_drop, *conn_, "already_closed");
|
|
return;
|
|
}
|
|
bool waitingForFirstPacket = !hasReceivedPackets(*conn_);
|
|
processUDPData(peer, std::move(networkData));
|
|
if (connCallback_ && waitingForFirstPacket && hasReceivedPackets(*conn_)) {
|
|
connCallback_->onFirstPeerPacketProcessed();
|
|
}
|
|
if (!transportReadyNotified_ && hasWriteCipher()) {
|
|
transportReadyNotified_ = true;
|
|
CHECK_NOTNULL(connCallback_)->onTransportReady();
|
|
}
|
|
|
|
// Checking connCallback_ because application will start to write data
|
|
// in onTransportReady, if the write fails, QuicSocket can be closed
|
|
// and connCallback_ is set nullptr.
|
|
if (connCallback_ && !replaySafeNotified_ && conn_->oneRttWriteCipher) {
|
|
replaySafeNotified_ = true;
|
|
// We don't need this any more. Also unset it so that we don't allow random
|
|
// middleboxes to shutdown our connection once we have crypto keys.
|
|
socket_->setErrMessageCallback(nullptr);
|
|
connCallback_->onReplaySafe();
|
|
}
|
|
}
|
|
|
|
void QuicClientTransport::writeData() {
|
|
// TODO: replace with write in state machine.
|
|
// TODO: change to draining when we move the client to have a draining state
|
|
// as well.
|
|
QuicVersion version = conn_->version.value_or(*conn_->originalVersion);
|
|
const ConnectionId& srcConnId = *conn_->clientConnectionId;
|
|
const ConnectionId* destConnId =
|
|
&(*clientConn_->initialDestinationConnectionId);
|
|
if (conn_->serverConnectionId) {
|
|
destConnId = &(*conn_->serverConnectionId);
|
|
}
|
|
if (closeState_ == CloseState::CLOSED) {
|
|
auto rtt = clientConn_->lossState.srtt == 0us
|
|
? clientConn_->transportSettings.initialRtt
|
|
: clientConn_->lossState.srtt;
|
|
if (clientConn_->lastCloseSentTime &&
|
|
Clock::now() - *clientConn_->lastCloseSentTime < rtt) {
|
|
return;
|
|
}
|
|
clientConn_->lastCloseSentTime = Clock::now();
|
|
if (clientConn_->clientHandshakeLayer->getPhase() ==
|
|
ClientHandshake::Phase::Established &&
|
|
conn_->oneRttWriteCipher) {
|
|
CHECK(conn_->oneRttWriteHeaderCipher);
|
|
writeShortClose(
|
|
*socket_,
|
|
*conn_,
|
|
*destConnId,
|
|
conn_->localConnectionError,
|
|
*conn_->oneRttWriteCipher,
|
|
*conn_->oneRttWriteHeaderCipher);
|
|
}
|
|
if (conn_->handshakeWriteCipher &&
|
|
*conn_->version != QuicVersion::MVFST_D24) {
|
|
CHECK(conn_->handshakeWriteHeaderCipher);
|
|
writeLongClose(
|
|
*socket_,
|
|
*conn_,
|
|
srcConnId,
|
|
*destConnId,
|
|
LongHeader::Types::Handshake,
|
|
conn_->localConnectionError,
|
|
*conn_->handshakeWriteCipher,
|
|
*conn_->handshakeWriteHeaderCipher,
|
|
version);
|
|
}
|
|
if (conn_->initialWriteCipher) {
|
|
CHECK(conn_->initialHeaderCipher);
|
|
writeLongClose(
|
|
*socket_,
|
|
*conn_,
|
|
srcConnId,
|
|
*destConnId,
|
|
LongHeader::Types::Initial,
|
|
conn_->localConnectionError,
|
|
*conn_->initialWriteCipher,
|
|
*conn_->initialHeaderCipher,
|
|
version);
|
|
}
|
|
return;
|
|
}
|
|
|
|
uint64_t packetLimit =
|
|
(isConnectionPaced(*conn_)
|
|
? conn_->pacer->updateAndGetWriteBatchSize(Clock::now())
|
|
: conn_->transportSettings.writeConnectionDataPacketsLimit);
|
|
if (conn_->initialWriteCipher) {
|
|
auto& initialCryptoStream =
|
|
*getCryptoStream(*conn_->cryptoState, EncryptionLevel::Initial);
|
|
CryptoStreamScheduler initialScheduler(*conn_, initialCryptoStream);
|
|
|
|
if ((initialCryptoStream.retransmissionBuffer.size() &&
|
|
conn_->outstandings.initialPacketsCount &&
|
|
conn_->pendingEvents.numProbePackets) ||
|
|
initialScheduler.hasData() ||
|
|
(conn_->ackStates.initialAckState.needsToSendAckImmediately &&
|
|
hasAcksToSchedule(conn_->ackStates.initialAckState))) {
|
|
CHECK(conn_->initialHeaderCipher);
|
|
packetLimit -= writeCryptoAndAckDataToSocket(
|
|
*socket_,
|
|
*conn_,
|
|
srcConnId /* src */,
|
|
*destConnId /* dst */,
|
|
LongHeader::Types::Initial,
|
|
*conn_->initialWriteCipher,
|
|
*conn_->initialHeaderCipher,
|
|
version,
|
|
packetLimit,
|
|
clientConn_->retryToken);
|
|
}
|
|
if (!packetLimit && !conn_->pendingEvents.numProbePackets) {
|
|
return;
|
|
}
|
|
}
|
|
if (conn_->handshakeWriteCipher) {
|
|
auto& handshakeCryptoStream =
|
|
*getCryptoStream(*conn_->cryptoState, EncryptionLevel::Handshake);
|
|
CryptoStreamScheduler handshakeScheduler(*conn_, handshakeCryptoStream);
|
|
if ((conn_->outstandings.handshakePacketsCount &&
|
|
handshakeCryptoStream.retransmissionBuffer.size() &&
|
|
conn_->pendingEvents.numProbePackets) ||
|
|
handshakeScheduler.hasData() ||
|
|
(conn_->ackStates.handshakeAckState.needsToSendAckImmediately &&
|
|
hasAcksToSchedule(conn_->ackStates.handshakeAckState))) {
|
|
CHECK(conn_->handshakeWriteHeaderCipher);
|
|
packetLimit -= writeCryptoAndAckDataToSocket(
|
|
*socket_,
|
|
*conn_,
|
|
srcConnId /* src */,
|
|
*destConnId /* dst */,
|
|
LongHeader::Types::Handshake,
|
|
*conn_->handshakeWriteCipher,
|
|
*conn_->handshakeWriteHeaderCipher,
|
|
version,
|
|
packetLimit);
|
|
}
|
|
if (!packetLimit && !conn_->pendingEvents.numProbePackets) {
|
|
return;
|
|
}
|
|
}
|
|
if (clientConn_->zeroRttWriteCipher && !conn_->oneRttWriteCipher) {
|
|
CHECK(clientConn_->zeroRttWriteHeaderCipher);
|
|
packetLimit -= writeZeroRttDataToSocket(
|
|
*socket_,
|
|
*conn_,
|
|
srcConnId /* src */,
|
|
*destConnId /* dst */,
|
|
*clientConn_->zeroRttWriteCipher,
|
|
*clientConn_->zeroRttWriteHeaderCipher,
|
|
version,
|
|
packetLimit);
|
|
}
|
|
if (!packetLimit && !conn_->pendingEvents.numProbePackets) {
|
|
return;
|
|
}
|
|
if (conn_->oneRttWriteCipher) {
|
|
CHECK(clientConn_->oneRttWriteHeaderCipher);
|
|
writeQuicDataExceptCryptoStreamToSocket(
|
|
*socket_,
|
|
*conn_,
|
|
srcConnId,
|
|
*destConnId,
|
|
*conn_->oneRttWriteCipher,
|
|
*conn_->oneRttWriteHeaderCipher,
|
|
version,
|
|
packetLimit);
|
|
}
|
|
}
|
|
|
|
void QuicClientTransport::startCryptoHandshake() {
|
|
auto self = this->shared_from_this();
|
|
// Set idle timer whenever crypto starts so that we can restart the idle timer
|
|
// after a version negotiation as well.
|
|
setIdleTimer();
|
|
// TODO: no need to close the transport if there is an error in the
|
|
// handshake.
|
|
// We need to update the flow control settings every time we start a crypto
|
|
// handshake. This is so that we can reset the flow control settings when
|
|
// we go through version negotiation as well.
|
|
updateFlowControlStateWithSettings(
|
|
conn_->flowControlState, conn_->transportSettings);
|
|
|
|
auto handshakeLayer = clientConn_->clientHandshakeLayer;
|
|
auto& cryptoFactory = handshakeLayer->getCryptoFactory();
|
|
|
|
auto version = conn_->originalVersion.value();
|
|
conn_->initialWriteCipher = cryptoFactory.getClientInitialCipher(
|
|
*clientConn_->initialDestinationConnectionId, version);
|
|
conn_->readCodec->setInitialReadCipher(cryptoFactory.getServerInitialCipher(
|
|
*clientConn_->initialDestinationConnectionId, version));
|
|
conn_->readCodec->setInitialHeaderCipher(
|
|
cryptoFactory.makeServerInitialHeaderCipher(
|
|
*clientConn_->initialDestinationConnectionId, version));
|
|
conn_->initialHeaderCipher = cryptoFactory.makeClientInitialHeaderCipher(
|
|
*clientConn_->initialDestinationConnectionId, version);
|
|
|
|
// Add partial reliability parameter to customTransportParameters_.
|
|
setPartialReliabilityTransportParameter();
|
|
|
|
auto paramsExtension = std::make_shared<ClientTransportParametersExtension>(
|
|
conn_->originalVersion.value(),
|
|
conn_->transportSettings.advertisedInitialConnectionWindowSize,
|
|
conn_->transportSettings.advertisedInitialBidiLocalStreamWindowSize,
|
|
conn_->transportSettings.advertisedInitialBidiRemoteStreamWindowSize,
|
|
conn_->transportSettings.advertisedInitialUniStreamWindowSize,
|
|
conn_->transportSettings.advertisedInitialMaxStreamsBidi,
|
|
conn_->transportSettings.advertisedInitialMaxStreamsUni,
|
|
conn_->transportSettings.idleTimeout,
|
|
conn_->transportSettings.ackDelayExponent,
|
|
conn_->transportSettings.maxRecvPacketSize,
|
|
conn_->transportSettings.selfActiveConnectionIdLimit,
|
|
conn_->clientConnectionId.value(),
|
|
customTransportParameters_);
|
|
conn_->transportParametersEncoded = true;
|
|
handshakeLayer->connect(hostname_, std::move(paramsExtension));
|
|
|
|
writeSocketData();
|
|
if (!transportReadyNotified_ && clientConn_->zeroRttWriteCipher) {
|
|
transportReadyNotified_ = true;
|
|
runOnEvbAsync([](auto self) {
|
|
auto clientPtr = static_cast<QuicClientTransport*>(self.get());
|
|
if (clientPtr->connCallback_) {
|
|
clientPtr->connCallback_->onTransportReady();
|
|
}
|
|
});
|
|
}
|
|
}
|
|
|
|
bool QuicClientTransport::hasWriteCipher() const {
|
|
return clientConn_->oneRttWriteCipher || clientConn_->zeroRttWriteCipher;
|
|
}
|
|
|
|
std::shared_ptr<QuicTransportBase> QuicClientTransport::sharedGuard() {
|
|
return shared_from_this();
|
|
}
|
|
|
|
bool QuicClientTransport::isTLSResumed() const {
|
|
return clientConn_->clientHandshakeLayer->isTLSResumed();
|
|
}
|
|
|
|
void QuicClientTransport::errMessage(
|
|
FOLLY_MAYBE_UNUSED const cmsghdr& cmsg) noexcept {
|
|
#ifdef FOLLY_HAVE_MSG_ERRQUEUE
|
|
if ((cmsg.cmsg_level == SOL_IP && cmsg.cmsg_type == IP_RECVERR) ||
|
|
(cmsg.cmsg_level == SOL_IPV6 && cmsg.cmsg_type == IPV6_RECVERR)) {
|
|
const struct sock_extended_err* serr =
|
|
reinterpret_cast<const struct sock_extended_err*>(CMSG_DATA(&cmsg));
|
|
auto connectionError = (serr->ee_errno == ECONNREFUSED) ||
|
|
(serr->ee_errno == ENETUNREACH) || (serr->ee_errno == ENETDOWN);
|
|
if (!connectionError) {
|
|
return;
|
|
}
|
|
auto errStr = folly::errnoStr(serr->ee_errno);
|
|
runOnEvbAsync([errString = std::move(errStr)](auto self) {
|
|
auto quicError = std::make_pair(
|
|
QuicErrorCode(LocalErrorCode::CONNECT_FAILED), errString);
|
|
auto clientPtr = static_cast<QuicClientTransport*>(self.get());
|
|
clientPtr->closeImpl(std::move(quicError), false, false);
|
|
});
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void QuicClientTransport::onReadError(
|
|
const folly::AsyncSocketException& ex) noexcept {
|
|
if (closeState_ == CloseState::OPEN) {
|
|
// closeNow will skip draining the socket. onReadError doesn't gets
|
|
// triggered by retriable errors. If we are here, there is no point of
|
|
// draining the socket.
|
|
runOnEvbAsync([ex](auto self) {
|
|
auto clientPtr = static_cast<QuicClientTransport*>(self.get());
|
|
clientPtr->closeNow(std::make_pair(
|
|
QuicErrorCode(LocalErrorCode::CONNECTION_ABANDONED),
|
|
std::string(ex.what())));
|
|
});
|
|
}
|
|
}
|
|
|
|
void QuicClientTransport::getReadBuffer(void** buf, size_t* len) noexcept {
|
|
DCHECK(conn_) << "trying to receive packets without a connection";
|
|
auto readBufferSize =
|
|
conn_->transportSettings.maxRecvPacketSize * numGROBuffers_;
|
|
readBuffer_ = folly::IOBuf::create(readBufferSize);
|
|
*buf = readBuffer_->writableData();
|
|
*len = readBufferSize;
|
|
}
|
|
|
|
void QuicClientTransport::onDataAvailable(
|
|
const folly::SocketAddress& server,
|
|
size_t len,
|
|
bool truncated,
|
|
OnDataAvailableParams params) noexcept {
|
|
VLOG(10) << "Got data from socket peer=" << server << " len=" << len;
|
|
auto packetReceiveTime = Clock::now();
|
|
Buf data = std::move(readBuffer_);
|
|
|
|
if (params.gro_ <= 0) {
|
|
if (truncated) {
|
|
// This is an error, drop the packet.
|
|
QUIC_STATS(
|
|
statsCallback_, onPacketDropped, PacketDropReason::UDP_TRUNCATED);
|
|
if (conn_->qLogger) {
|
|
conn_->qLogger->addPacketDrop(len, kUdpTruncated);
|
|
}
|
|
QUIC_TRACE(packet_drop, *conn_, "udp_truncated");
|
|
if (conn_->loopDetectorCallback) {
|
|
conn_->readDebugState.noReadReason = NoReadReason::TRUNCATED;
|
|
conn_->loopDetectorCallback->onSuspiciousReadLoops(
|
|
++conn_->readDebugState.loopCount,
|
|
conn_->readDebugState.noReadReason);
|
|
}
|
|
return;
|
|
}
|
|
data->append(len);
|
|
trackDatagramReceived(len);
|
|
NetworkData networkData(std::move(data), packetReceiveTime);
|
|
onNetworkData(server, std::move(networkData));
|
|
} else {
|
|
// if we receive a truncated packet
|
|
// we still need to consider the prev valid ones
|
|
// AsyncUDPSocket::handleRead() sets the len to be the
|
|
// buffer size in case the data is truncated
|
|
if (truncated) {
|
|
auto delta = len % params.gro_;
|
|
len -= delta;
|
|
|
|
QUIC_STATS(
|
|
statsCallback_, onPacketDropped, PacketDropReason::UDP_TRUNCATED);
|
|
if (conn_->qLogger) {
|
|
conn_->qLogger->addPacketDrop(delta, kUdpTruncated);
|
|
}
|
|
QUIC_TRACE(packet_drop, *conn_, "udp_truncated");
|
|
}
|
|
|
|
data->append(len);
|
|
trackDatagramReceived(len);
|
|
|
|
NetworkData networkData;
|
|
networkData.receiveTimePoint = packetReceiveTime;
|
|
networkData.packets.reserve((len + params.gro_ - 1) / params.gro_);
|
|
size_t remaining = len;
|
|
size_t offset = 0;
|
|
while (remaining) {
|
|
if (static_cast<int>(remaining) > params.gro_) {
|
|
auto tmp = data->cloneOne();
|
|
// start at offset
|
|
tmp->trimStart(offset);
|
|
// the actual len is len - offset now
|
|
// leave params.gro_ bytes
|
|
tmp->trimEnd(len - offset - params.gro_);
|
|
DCHECK_EQ(tmp->length(), params.gro_);
|
|
|
|
offset += params.gro_;
|
|
remaining -= params.gro_;
|
|
networkData.packets.emplace_back(std::move(tmp));
|
|
} else {
|
|
// do not clone the last packet
|
|
// start at offset, use all the remaining data
|
|
data->trimStart(offset);
|
|
DCHECK_EQ(data->length(), remaining);
|
|
remaining = 0;
|
|
networkData.packets.emplace_back(std::move(data));
|
|
}
|
|
}
|
|
|
|
onNetworkData(server, std::move(networkData));
|
|
}
|
|
}
|
|
|
|
bool QuicClientTransport::shouldOnlyNotify() {
|
|
return conn_->transportSettings.shouldRecvBatch;
|
|
}
|
|
|
|
void QuicClientTransport::recvMsg(
|
|
folly::AsyncUDPSocket& sock,
|
|
uint64_t readBufferSize,
|
|
int numPackets,
|
|
NetworkData& networkData,
|
|
folly::Optional<folly::SocketAddress>& server,
|
|
size_t& totalData) {
|
|
for (int packetNum = 0; packetNum < numPackets; ++packetNum) {
|
|
// We create 1 buffer per packet so that it is not shared, this enables
|
|
// us to decrypt in place. If the fizz decrypt api could decrypt in-place
|
|
// even if shared, then we could allocate one giant IOBuf here.
|
|
Buf readBuffer = folly::IOBuf::create(readBufferSize);
|
|
struct iovec vec {};
|
|
vec.iov_base = readBuffer->writableData();
|
|
vec.iov_len = readBufferSize;
|
|
|
|
sockaddr* rawAddr{nullptr};
|
|
struct sockaddr_storage addrStorage {};
|
|
socklen_t addrLen{sizeof(addrStorage)};
|
|
if (!server) {
|
|
rawAddr = reinterpret_cast<sockaddr*>(&addrStorage);
|
|
rawAddr->sa_family = sock.address().getFamily();
|
|
}
|
|
|
|
int flags = 0;
|
|
int gro = -1;
|
|
struct msghdr msg {};
|
|
msg.msg_name = rawAddr;
|
|
msg.msg_namelen = size_t(addrLen);
|
|
msg.msg_iov = &vec;
|
|
msg.msg_iovlen = 1;
|
|
#ifdef FOLLY_HAVE_MSG_ERRQUEUE
|
|
char control[CMSG_SPACE(sizeof(uint16_t))] = {};
|
|
bool useGRO = sock.getGRO() > 0;
|
|
|
|
if (useGRO) {
|
|
msg.msg_control = control;
|
|
msg.msg_controllen = sizeof(control);
|
|
|
|
// we need to consider MSG_TRUNC too
|
|
flags |= MSG_TRUNC;
|
|
}
|
|
#endif
|
|
|
|
ssize_t ret = sock.recvmsg(&msg, flags);
|
|
if (ret < 0) {
|
|
if (errno == EAGAIN || errno == EWOULDBLOCK) {
|
|
// If we got a retriable error, let us continue.
|
|
if (conn_->loopDetectorCallback) {
|
|
conn_->readDebugState.noReadReason = NoReadReason::RETRIABLE_ERROR;
|
|
}
|
|
break;
|
|
}
|
|
// If we got a non-retriable error, we might have received
|
|
// a packet that we could process, however let's just quit early.
|
|
sock.pauseRead();
|
|
if (conn_->loopDetectorCallback) {
|
|
conn_->readDebugState.noReadReason = NoReadReason::NONRETRIABLE_ERROR;
|
|
}
|
|
return onReadError(folly::AsyncSocketException(
|
|
folly::AsyncSocketException::INTERNAL_ERROR,
|
|
"::recvmsg() failed",
|
|
errno));
|
|
} else if (ret == 0) {
|
|
break;
|
|
}
|
|
#ifdef FOLLY_HAVE_MSG_ERRQUEUE
|
|
if (useGRO) {
|
|
for (struct cmsghdr* cmsg = CMSG_FIRSTHDR(&msg); cmsg != nullptr;
|
|
cmsg = CMSG_NXTHDR(&msg, cmsg)) {
|
|
if (cmsg->cmsg_level == SOL_UDP && cmsg->cmsg_type == UDP_GRO) {
|
|
gro = *((uint16_t*)CMSG_DATA(cmsg));
|
|
break;
|
|
}
|
|
}
|
|
|
|
// truncated
|
|
if ((size_t)ret > readBufferSize) {
|
|
ret = readBufferSize;
|
|
if (gro > 0) {
|
|
ret = ret - ret % gro;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
size_t bytesRead = size_t(ret);
|
|
totalData += bytesRead;
|
|
if (!server) {
|
|
server = folly::SocketAddress();
|
|
server->setFromSockaddr(rawAddr, addrLen);
|
|
}
|
|
VLOG(10) << "Got data from socket peer=" << *server << " len=" << bytesRead;
|
|
readBuffer->append(bytesRead);
|
|
if (gro > 0) {
|
|
size_t len = bytesRead;
|
|
size_t remaining = len;
|
|
size_t offset = 0;
|
|
size_t totalNumPackets =
|
|
networkData.packets.size() + ((len + gro - 1) / gro);
|
|
networkData.packets.reserve(totalNumPackets);
|
|
while (remaining) {
|
|
if (static_cast<int>(remaining) > gro) {
|
|
auto tmp = readBuffer->cloneOne();
|
|
// start at offset
|
|
tmp->trimStart(offset);
|
|
// the actual len is len - offset now
|
|
// leave gro bytes
|
|
tmp->trimEnd(len - offset - gro);
|
|
DCHECK_EQ(tmp->length(), gro);
|
|
|
|
offset += gro;
|
|
remaining -= gro;
|
|
networkData.packets.emplace_back(std::move(tmp));
|
|
} else {
|
|
// do not clone the last packet
|
|
// start at offset, use all the remaining data
|
|
readBuffer->trimStart(offset);
|
|
DCHECK_EQ(readBuffer->length(), remaining);
|
|
remaining = 0;
|
|
networkData.packets.emplace_back(std::move(readBuffer));
|
|
}
|
|
}
|
|
} else {
|
|
networkData.packets.emplace_back(std::move(readBuffer));
|
|
}
|
|
if (conn_->qLogger) {
|
|
conn_->qLogger->addDatagramReceived(bytesRead);
|
|
}
|
|
}
|
|
}
|
|
|
|
void QuicClientTransport::recvMmsg(
|
|
folly::AsyncUDPSocket& sock,
|
|
uint64_t readBufferSize,
|
|
int numPackets,
|
|
NetworkData& networkData,
|
|
folly::Optional<folly::SocketAddress>& server,
|
|
size_t& totalData) {
|
|
const size_t addrLen = sizeof(struct sockaddr_storage);
|
|
|
|
auto& msgs = recvmmsgStorage_.msgs;
|
|
auto& addrs = recvmmsgStorage_.addrs;
|
|
auto& readBuffers = recvmmsgStorage_.readBuffers;
|
|
auto& iovecs = recvmmsgStorage_.iovecs;
|
|
auto& freeBufs = recvmmsgStorage_.freeBufs;
|
|
int flags = 0;
|
|
#ifdef FOLLY_HAVE_MSG_ERRQUEUE
|
|
bool useGRO = sock.getGRO() > 0;
|
|
std::vector<std::array<char, CMSG_SPACE(sizeof(uint16_t))>> controlVec(
|
|
useGRO ? numPackets : 0);
|
|
|
|
// we need to consider MSG_TRUNC too
|
|
if (useGRO) {
|
|
flags |= MSG_TRUNC;
|
|
}
|
|
#endif
|
|
|
|
for (int i = 0; i < numPackets; ++i) {
|
|
Buf readBuffer;
|
|
if (freeBufs.empty()) {
|
|
readBuffer = folly::IOBuf::create(readBufferSize);
|
|
} else {
|
|
readBuffer = std::move(freeBufs.back());
|
|
DCHECK(readBuffer != nullptr);
|
|
freeBufs.pop_back();
|
|
}
|
|
iovecs[i].iov_base = readBuffer->writableData();
|
|
iovecs[i].iov_len = readBufferSize;
|
|
readBuffers[i] = std::move(readBuffer);
|
|
|
|
auto* rawAddr = reinterpret_cast<sockaddr*>(&addrs[i]);
|
|
rawAddr->sa_family = socket_->address().getFamily();
|
|
|
|
struct msghdr* msg = &msgs[i].msg_hdr;
|
|
msg->msg_name = rawAddr;
|
|
msg->msg_namelen = addrLen;
|
|
msg->msg_iov = &iovecs[i];
|
|
msg->msg_iovlen = 1;
|
|
#ifdef FOLLY_HAVE_MSG_ERRQUEUE
|
|
if (useGRO) {
|
|
msg->msg_control = controlVec[i].data();
|
|
msg->msg_controllen = controlVec[i].size();
|
|
}
|
|
#endif
|
|
}
|
|
|
|
int numMsgsRecvd = sock.recvmmsg(msgs.data(), numPackets, flags, nullptr);
|
|
if (numMsgsRecvd < 0) {
|
|
if (errno == EAGAIN || errno == EWOULDBLOCK) {
|
|
// Exit, socket will notify us again when socket is readable.
|
|
if (conn_->loopDetectorCallback) {
|
|
conn_->readDebugState.noReadReason = NoReadReason::RETRIABLE_ERROR;
|
|
}
|
|
return;
|
|
}
|
|
// If we got a non-retriable error, we might have received
|
|
// a packet that we could process, however let's just quit early.
|
|
sock.pauseRead();
|
|
if (conn_->loopDetectorCallback) {
|
|
conn_->readDebugState.noReadReason = NoReadReason::NONRETRIABLE_ERROR;
|
|
}
|
|
return onReadError(folly::AsyncSocketException(
|
|
folly::AsyncSocketException::INTERNAL_ERROR,
|
|
"::recvmmsg() failed",
|
|
errno));
|
|
}
|
|
|
|
CHECK_LE(numMsgsRecvd, numPackets);
|
|
// Need to save our position so we can recycle the unused buffers.
|
|
int i;
|
|
for (i = 0; i < numMsgsRecvd; ++i) {
|
|
size_t bytesRead = msgs[i].msg_len;
|
|
if (bytesRead == 0) {
|
|
// Empty datagram, this is probably garbage matching our tuple, we should
|
|
// ignore such datagrams.
|
|
freeBufs.emplace_back(std::move(readBuffers[i]));
|
|
continue;
|
|
}
|
|
int gro = -1;
|
|
#ifdef FOLLY_HAVE_MSG_ERRQUEUE
|
|
if (useGRO) {
|
|
for (struct cmsghdr* cmsg = CMSG_FIRSTHDR(&msgs[i].msg_hdr);
|
|
cmsg != nullptr;
|
|
cmsg = CMSG_NXTHDR(&msgs[i].msg_hdr, cmsg)) {
|
|
if (cmsg->cmsg_level == SOL_UDP && cmsg->cmsg_type == UDP_GRO) {
|
|
gro = *((uint16_t*)CMSG_DATA(cmsg));
|
|
break;
|
|
}
|
|
}
|
|
|
|
// truncated
|
|
if (bytesRead > readBufferSize) {
|
|
bytesRead = readBufferSize;
|
|
if (gro > 0) {
|
|
bytesRead = bytesRead - bytesRead % gro;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
totalData += bytesRead;
|
|
|
|
if (!server) {
|
|
server = folly::SocketAddress();
|
|
auto* rawAddr = reinterpret_cast<sockaddr*>(&addrs[i]);
|
|
server->setFromSockaddr(rawAddr, addrLen);
|
|
}
|
|
|
|
VLOG(10) << "Got data from socket peer=" << *server << " len=" << bytesRead;
|
|
readBuffers[i]->append(bytesRead);
|
|
if (gro > 0) {
|
|
size_t len = bytesRead;
|
|
size_t remaining = len;
|
|
size_t offset = 0;
|
|
size_t totalNumPackets =
|
|
networkData.packets.size() + ((len + gro - 1) / gro);
|
|
networkData.packets.reserve(totalNumPackets);
|
|
while (remaining) {
|
|
if (static_cast<int>(remaining) > gro) {
|
|
auto tmp = readBuffers[i]->cloneOne();
|
|
// start at offset
|
|
tmp->trimStart(offset);
|
|
// the actual len is len - offset now
|
|
// leave gro bytes
|
|
tmp->trimEnd(len - offset - gro);
|
|
DCHECK_EQ(tmp->length(), gro);
|
|
|
|
offset += gro;
|
|
remaining -= gro;
|
|
networkData.packets.emplace_back(std::move(tmp));
|
|
} else {
|
|
// do not clone the last packet
|
|
// start at offset, use all the remaining data
|
|
readBuffers[i]->trimStart(offset);
|
|
DCHECK_EQ(readBuffers[i]->length(), remaining);
|
|
remaining = 0;
|
|
networkData.packets.emplace_back(std::move(readBuffers[i]));
|
|
}
|
|
}
|
|
} else {
|
|
networkData.packets.emplace_back(std::move(readBuffers[i]));
|
|
}
|
|
|
|
QUIC_TRACE(udp_recvd, *conn_, bytesRead);
|
|
trackDatagramReceived(bytesRead);
|
|
}
|
|
for (; i < numPackets; i++) {
|
|
freeBufs.emplace_back(std::move(readBuffers[i]));
|
|
DCHECK(freeBufs.back() != nullptr);
|
|
}
|
|
}
|
|
|
|
void QuicClientTransport::onNotifyDataAvailable(
|
|
folly::AsyncUDPSocket& sock) noexcept {
|
|
DCHECK(conn_) << "trying to receive packets without a connection";
|
|
auto readBufferSize =
|
|
conn_->transportSettings.maxRecvPacketSize * numGROBuffers_;
|
|
const int numPackets = conn_->transportSettings.maxRecvBatchSize;
|
|
|
|
NetworkData networkData;
|
|
networkData.packets.reserve(numPackets);
|
|
size_t totalData = 0;
|
|
folly::Optional<folly::SocketAddress> server;
|
|
|
|
if (conn_->transportSettings.shouldUseRecvmmsgForBatchRecv) {
|
|
recvmmsgStorage_.resize(numPackets);
|
|
recvMmsg(sock, readBufferSize, numPackets, networkData, server, totalData);
|
|
} else {
|
|
recvMsg(sock, readBufferSize, numPackets, networkData, server, totalData);
|
|
}
|
|
|
|
if (networkData.packets.empty()) {
|
|
// recvMmsg and recvMsg might have already set the reason and counter
|
|
if (conn_->loopDetectorCallback) {
|
|
if (conn_->readDebugState.noReadReason == NoReadReason::READ_OK) {
|
|
conn_->readDebugState.noReadReason = NoReadReason::EMPTY_DATA;
|
|
}
|
|
if (conn_->readDebugState.noReadReason != NoReadReason::READ_OK) {
|
|
conn_->loopDetectorCallback->onSuspiciousReadLoops(
|
|
++conn_->readDebugState.loopCount,
|
|
conn_->readDebugState.noReadReason);
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
DCHECK(server.has_value());
|
|
// TODO: we can get better receive time accuracy than this, with
|
|
// SO_TIMESTAMP or SIOCGSTAMP.
|
|
auto packetReceiveTime = Clock::now();
|
|
networkData.receiveTimePoint = packetReceiveTime;
|
|
networkData.totalData = totalData;
|
|
onNetworkData(*server, std::move(networkData));
|
|
}
|
|
|
|
void QuicClientTransport::
|
|
happyEyeballsConnAttemptDelayTimeoutExpired() noexcept {
|
|
QUIC_TRACE(happy_eyeballs, *conn_, "delay timer expired");
|
|
// Declare 0-RTT data as lost so that they will be retransmitted over the
|
|
// second socket.
|
|
markZeroRttPacketsLost(*conn_, markPacketLoss);
|
|
happyEyeballsStartSecondSocket(conn_->happyEyeballsState);
|
|
}
|
|
|
|
void QuicClientTransport::start(ConnectionCallback* cb) {
|
|
if (happyEyeballsEnabled_) {
|
|
// TODO Supply v4 delay amount from somewhere when we want to tune this
|
|
startHappyEyeballs(
|
|
*conn_,
|
|
evb_,
|
|
happyEyeballsCachedFamily_,
|
|
happyEyeballsConnAttemptDelayTimeout_,
|
|
happyEyeballsCachedFamily_ == AF_UNSPEC
|
|
? kHappyEyeballsV4Delay
|
|
: kHappyEyeballsConnAttemptDelayWithCache,
|
|
this,
|
|
this,
|
|
socketOptions_);
|
|
}
|
|
|
|
CHECK(conn_->peerAddress.isInitialized());
|
|
|
|
if (conn_->qLogger) {
|
|
conn_->qLogger->addTransportStateUpdate(kStart);
|
|
}
|
|
QUIC_TRACE(fst_trace, *conn_, "start");
|
|
setConnectionCallback(cb);
|
|
try {
|
|
happyEyeballsSetUpSocket(
|
|
*socket_,
|
|
conn_->localAddress,
|
|
conn_->peerAddress,
|
|
conn_->transportSettings,
|
|
this,
|
|
this,
|
|
socketOptions_);
|
|
// adjust the GRO buffers
|
|
adjustGROBuffers();
|
|
startCryptoHandshake();
|
|
} catch (const QuicTransportException& ex) {
|
|
runOnEvbAsync([ex](auto self) {
|
|
auto clientPtr = static_cast<QuicClientTransport*>(self.get());
|
|
clientPtr->closeImpl(std::make_pair(
|
|
QuicErrorCode(ex.errorCode()), std::string(ex.what())));
|
|
});
|
|
} catch (const QuicInternalException& ex) {
|
|
runOnEvbAsync([ex](auto self) {
|
|
auto clientPtr = static_cast<QuicClientTransport*>(self.get());
|
|
clientPtr->closeImpl(std::make_pair(
|
|
QuicErrorCode(ex.errorCode()), std::string(ex.what())));
|
|
});
|
|
} catch (const std::exception& ex) {
|
|
LOG(ERROR) << "Connect failed " << ex.what();
|
|
runOnEvbAsync([ex](auto self) {
|
|
auto clientPtr = static_cast<QuicClientTransport*>(self.get());
|
|
clientPtr->closeImpl(std::make_pair(
|
|
QuicErrorCode(TransportErrorCode::INTERNAL_ERROR),
|
|
std::string(ex.what())));
|
|
});
|
|
}
|
|
}
|
|
|
|
void QuicClientTransport::addNewPeerAddress(folly::SocketAddress peerAddress) {
|
|
CHECK(peerAddress.isInitialized());
|
|
|
|
if (happyEyeballsEnabled_) {
|
|
conn_->udpSendPacketLen = std::min(
|
|
conn_->udpSendPacketLen,
|
|
(peerAddress.getFamily() == AF_INET6 ? kDefaultV6UDPSendPacketLen
|
|
: kDefaultV4UDPSendPacketLen));
|
|
happyEyeballsAddPeerAddress(*conn_, peerAddress);
|
|
return;
|
|
}
|
|
|
|
conn_->udpSendPacketLen = peerAddress.getFamily() == AF_INET6
|
|
? kDefaultV6UDPSendPacketLen
|
|
: kDefaultV4UDPSendPacketLen;
|
|
conn_->originalPeerAddress = peerAddress;
|
|
conn_->peerAddress = std::move(peerAddress);
|
|
}
|
|
|
|
void QuicClientTransport::setLocalAddress(folly::SocketAddress localAddress) {
|
|
CHECK(localAddress.isInitialized());
|
|
conn_->localAddress = std::move(localAddress);
|
|
}
|
|
|
|
void QuicClientTransport::setHappyEyeballsEnabled(bool happyEyeballsEnabled) {
|
|
happyEyeballsEnabled_ = happyEyeballsEnabled;
|
|
}
|
|
|
|
void QuicClientTransport::setHappyEyeballsCachedFamily(
|
|
sa_family_t cachedFamily) {
|
|
happyEyeballsCachedFamily_ = cachedFamily;
|
|
}
|
|
|
|
void QuicClientTransport::addNewSocket(
|
|
std::unique_ptr<folly::AsyncUDPSocket> socket) {
|
|
happyEyeballsAddSocket(*conn_, std::move(socket));
|
|
}
|
|
|
|
void QuicClientTransport::setHostname(const std::string& hostname) {
|
|
hostname_ = hostname;
|
|
}
|
|
|
|
void QuicClientTransport::setSelfOwning() {
|
|
selfOwning_ = shared_from_this();
|
|
}
|
|
|
|
bool QuicClientTransport::setCustomTransportParameter(
|
|
std::unique_ptr<CustomTransportParameter> customParam) {
|
|
// check that the parameter id is in the "private parameter" range, as
|
|
// described by the spec.
|
|
if (static_cast<uint16_t>(customParam->getParameterId()) <
|
|
kCustomTransportParameterThreshold) {
|
|
return false;
|
|
}
|
|
|
|
// check to see that we haven't already added in a parameter with the
|
|
// specified parameter id
|
|
auto it = std::find_if(
|
|
customTransportParameters_.begin(),
|
|
customTransportParameters_.end(),
|
|
[&customParam](const TransportParameter& param) {
|
|
return param.parameter == customParam->getParameterId();
|
|
});
|
|
|
|
// if a match has been found, we return failure
|
|
if (it != customTransportParameters_.end()) {
|
|
return false;
|
|
}
|
|
|
|
customTransportParameters_.push_back(customParam->encode());
|
|
return true;
|
|
}
|
|
|
|
void QuicClientTransport::setPartialReliabilityTransportParameter() {
|
|
uint64_t partialReliabilitySetting = 0;
|
|
if (conn_->transportSettings.partialReliabilityEnabled) {
|
|
partialReliabilitySetting = 1;
|
|
}
|
|
auto partialReliabilityCustomParam =
|
|
std::make_unique<CustomIntegralTransportParameter>(
|
|
kPartialReliabilityParameterId, partialReliabilitySetting);
|
|
|
|
if (!setCustomTransportParameter(std::move(partialReliabilityCustomParam))) {
|
|
LOG(ERROR) << "failed to set partial reliability transport setting";
|
|
}
|
|
}
|
|
|
|
void QuicClientTransport::adjustGROBuffers() {
|
|
if (socket_ && conn_) {
|
|
if (conn_->transportSettings.numGROBuffers_ > kDefaultNumGROBuffers) {
|
|
socket_->setGRO(true);
|
|
auto ret = socket_->getGRO();
|
|
|
|
if (ret > 0) {
|
|
numGROBuffers_ =
|
|
(conn_->transportSettings.numGROBuffers_ < kMaxNumGROBuffers)
|
|
? conn_->transportSettings.numGROBuffers_
|
|
: kMaxNumGROBuffers;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void QuicClientTransport::closeTransport() {
|
|
happyEyeballsConnAttemptDelayTimeout_.cancelTimeout();
|
|
}
|
|
|
|
void QuicClientTransport::unbindConnection() {
|
|
selfOwning_ = nullptr;
|
|
}
|
|
|
|
void QuicClientTransport::setSupportedVersions(
|
|
const std::vector<QuicVersion>& versions) {
|
|
conn_->originalVersion = versions.at(0);
|
|
auto params = conn_->readCodec->getCodecParameters();
|
|
params.version = conn_->originalVersion.value();
|
|
conn_->readCodec->setCodecParameters(params);
|
|
}
|
|
|
|
void QuicClientTransport::setQLogger(std::shared_ptr<QLogger> qLogger) {
|
|
// TODO: For a client transport, client CID isn't dcid. But FileQLogger will
|
|
// use dcid as file name.
|
|
if (!qLogger) {
|
|
return;
|
|
}
|
|
qLogger->setDcid(conn_->clientConnectionId);
|
|
QuicTransportBase::setQLogger(std::move(qLogger));
|
|
}
|
|
|
|
void QuicClientTransport::onNetworkSwitch(
|
|
std::unique_ptr<folly::AsyncUDPSocket> newSock) {
|
|
if (!conn_->oneRttWriteCipher) {
|
|
return;
|
|
}
|
|
if (socket_ && newSock) {
|
|
auto sock = std::move(socket_);
|
|
socket_ = nullptr;
|
|
sock->setErrMessageCallback(nullptr);
|
|
sock->pauseRead();
|
|
sock->close();
|
|
|
|
socket_ = std::move(newSock);
|
|
happyEyeballsSetUpSocket(
|
|
*socket_,
|
|
conn_->localAddress,
|
|
conn_->peerAddress,
|
|
conn_->transportSettings,
|
|
this,
|
|
this,
|
|
socketOptions_);
|
|
if (conn_->qLogger) {
|
|
conn_->qLogger->addConnectionMigrationUpdate(true);
|
|
}
|
|
|
|
// adjust the GRO buffers
|
|
adjustGROBuffers();
|
|
}
|
|
}
|
|
|
|
void QuicClientTransport::setTransportStatsCallback(
|
|
std::shared_ptr<QuicTransportStatsCallback> statsCallback) noexcept {
|
|
CHECK(conn_);
|
|
statsCallback_ = std::move(statsCallback);
|
|
if (statsCallback_) {
|
|
conn_->statsCallback = statsCallback_.get();
|
|
} else {
|
|
conn_->statsCallback = nullptr;
|
|
}
|
|
}
|
|
|
|
void QuicClientTransport::trackDatagramReceived(size_t len) {
|
|
if (conn_->qLogger) {
|
|
conn_->qLogger->addDatagramReceived(len);
|
|
}
|
|
QUIC_STATS(statsCallback_, onPacketReceived);
|
|
QUIC_STATS(statsCallback_, onRead, len);
|
|
}
|
|
|
|
} // namespace quic
|