diff options
Diffstat (limited to '')
| -rw-r--r-- | netwerk/protocol/http/nsHttpConnection.cpp | 2551 |
1 files changed, 2551 insertions, 0 deletions
diff --git a/netwerk/protocol/http/nsHttpConnection.cpp b/netwerk/protocol/http/nsHttpConnection.cpp new file mode 100644 index 0000000000..07ca208acd --- /dev/null +++ b/netwerk/protocol/http/nsHttpConnection.cpp @@ -0,0 +1,2551 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim:set ts=4 sw=2 sts=2 et cin: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +// HttpLog.h should generally be included first +#include "HttpLog.h" + +// Log on level :5, instead of default :4. +#undef LOG +#define LOG(args) LOG5(args) +#undef LOG_ENABLED +#define LOG_ENABLED() LOG5_ENABLED() + +#include "ASpdySession.h" +#include "NSSErrorsService.h" +#include "TLSTransportLayer.h" +#include "mozilla/ChaosMode.h" +#include "mozilla/StaticPrefs_network.h" +#include "mozilla/Telemetry.h" +#include "mozpkix/pkixnss.h" +#include "nsCRT.h" +#include "nsHttpConnection.h" +#include "nsHttpHandler.h" +#include "nsHttpRequestHead.h" +#include "nsHttpResponseHead.h" +#include "nsIClassOfService.h" +#include "nsIOService.h" +#include "nsISocketTransport.h" +#include "nsISupportsPriority.h" +#include "nsITLSSocketControl.h" +#include "nsITransportSecurityInfo.h" +#include "nsPreloadedStream.h" +#include "nsProxyRelease.h" +#include "nsQueryObject.h" +#include "nsSocketTransport2.h" +#include "nsSocketTransportService2.h" +#include "nsStringStream.h" +#include "sslerr.h" +#include "sslt.h" + +namespace mozilla::net { + +enum TlsHandshakeResult : uint32_t { + EchConfigSuccessful = 0, + EchConfigFailed, + NoEchConfigSuccessful, + NoEchConfigFailed, +}; + +//----------------------------------------------------------------------------- +// nsHttpConnection <public> +//----------------------------------------------------------------------------- + +nsHttpConnection::nsHttpConnection() : mHttpHandler(gHttpHandler) { + LOG(("Creating nsHttpConnection @%p\n", this)); + + // the default timeout is for when this connection has not yet processed a + // transaction + static const PRIntervalTime k5Sec = PR_SecondsToInterval(5); + mIdleTimeout = (k5Sec < gHttpHandler->IdleTimeout()) + ? k5Sec + : gHttpHandler->IdleTimeout(); + + mThroughCaptivePortal = gHttpHandler->GetThroughCaptivePortal(); +} + +nsHttpConnection::~nsHttpConnection() { + LOG(("Destroying nsHttpConnection @%p\n", this)); + + if (!mEverUsedSpdy) { + LOG(("nsHttpConnection %p performed %d HTTP/1.x transactions\n", this, + mHttp1xTransactionCount)); + Telemetry::Accumulate(Telemetry::HTTP_REQUEST_PER_CONN, + mHttp1xTransactionCount); + nsHttpConnectionInfo* ci = nullptr; + if (mTransaction) { + ci = mTransaction->ConnectionInfo(); + } + if (!ci) { + ci = mConnInfo; + } + + MOZ_ASSERT(ci); + if (ci->GetIsTrrServiceChannel()) { + Telemetry::Accumulate(Telemetry::DNS_TRR_REQUEST_PER_CONN, + mHttp1xTransactionCount); + } + } + + if (mTotalBytesRead) { + uint32_t totalKBRead = static_cast<uint32_t>(mTotalBytesRead >> 10); + LOG(("nsHttpConnection %p read %dkb on connection spdy=%d\n", this, + totalKBRead, mEverUsedSpdy)); + Telemetry::Accumulate(mEverUsedSpdy ? Telemetry::SPDY_KBREAD_PER_CONN2 + : Telemetry::HTTP_KBREAD_PER_CONN2, + totalKBRead); + } + + if (mThroughCaptivePortal) { + if (mTotalBytesRead || mTotalBytesWritten) { + auto total = + Clamp<uint32_t>((mTotalBytesRead >> 10) + (mTotalBytesWritten >> 10), + 0, std::numeric_limits<uint32_t>::max()); + Telemetry::ScalarAdd( + Telemetry::ScalarID::NETWORKING_DATA_TRANSFERRED_CAPTIVE_PORTAL, + total); + } + + Telemetry::ScalarAdd( + Telemetry::ScalarID::NETWORKING_HTTP_CONNECTIONS_CAPTIVE_PORTAL, 1); + } + + if (mForceSendTimer) { + mForceSendTimer->Cancel(); + mForceSendTimer = nullptr; + } + + auto ReleaseSocketTransport = + [socketTransport(std::move(mSocketTransport))]() mutable { + socketTransport = nullptr; + }; + if (OnSocketThread()) { + ReleaseSocketTransport(); + } else { + gSocketTransportService->Dispatch(NS_NewRunnableFunction( + "nsHttpConnection::~nsHttpConnection", ReleaseSocketTransport)); + } +} + +nsresult nsHttpConnection::Init( + nsHttpConnectionInfo* info, uint16_t maxHangTime, + nsISocketTransport* transport, nsIAsyncInputStream* instream, + nsIAsyncOutputStream* outstream, bool connectedTransport, nsresult status, + nsIInterfaceRequestor* callbacks, PRIntervalTime rtt, bool forWebSocket) { + LOG1(("nsHttpConnection::Init this=%p sockettransport=%p forWebSocket=%d", + this, transport, forWebSocket)); + NS_ENSURE_ARG_POINTER(info); + NS_ENSURE_TRUE(!mConnInfo, NS_ERROR_ALREADY_INITIALIZED); + MOZ_ASSERT(NS_SUCCEEDED(status) || !connectedTransport); + + mConnectedTransport = connectedTransport; + mConnInfo = info; + MOZ_ASSERT(mConnInfo); + + mLastWriteTime = mLastReadTime = PR_IntervalNow(); + mRtt = rtt; + mMaxHangTime = PR_SecondsToInterval(maxHangTime); + + mSocketTransport = transport; + mSocketIn = instream; + mSocketOut = outstream; + mForWebSocket = forWebSocket; + + // See explanation for non-strictness of this operation in + // SetSecurityCallbacks. + mCallbacks = new nsMainThreadPtrHolder<nsIInterfaceRequestor>( + "nsHttpConnection::mCallbacks", callbacks, false); + + mErrorBeforeConnect = status; + if (NS_SUCCEEDED(mErrorBeforeConnect)) { + mSocketTransport->SetEventSink(this, nullptr); + mSocketTransport->SetSecurityCallbacks(this); + } + + mTlsHandshaker = new TlsHandshaker(mConnInfo, this); + return NS_OK; +} + +void nsHttpConnection::ChangeState(HttpConnectionState newState) { + LOG(("nsHttpConnection::ChangeState %d -> %d [this=%p]", mState, newState, + this)); + mState = newState; +} + +nsresult nsHttpConnection::TryTakeSubTransactions( + nsTArray<RefPtr<nsAHttpTransaction> >& list) { + nsresult rv = mTransaction->TakeSubTransactions(list); + + if (rv == NS_ERROR_ALREADY_OPENED) { + // Has the interface for TakeSubTransactions() changed? + LOG( + ("TakeSubTransactions somehow called after " + "nsAHttpTransaction began processing\n")); + MOZ_ASSERT(false, + "TakeSubTransactions somehow called after " + "nsAHttpTransaction began processing"); + mTransaction->Close(NS_ERROR_ABORT); + return rv; + } + + if (NS_FAILED(rv) && rv != NS_ERROR_NOT_IMPLEMENTED) { + // Has the interface for TakeSubTransactions() changed? + LOG(("unexpected rv from nnsAHttpTransaction::TakeSubTransactions()")); + MOZ_ASSERT(false, + "unexpected result from " + "nsAHttpTransaction::TakeSubTransactions()"); + mTransaction->Close(NS_ERROR_ABORT); + return rv; + } + + return rv; +} + +void nsHttpConnection::ResetTransaction(RefPtr<nsAHttpTransaction>&& trans) { + MOZ_ASSERT(trans); + mSpdySession->SetConnection(trans->Connection()); + trans->SetConnection(nullptr); + trans->DoNotRemoveAltSvc(); + trans->Close(NS_ERROR_NET_RESET); +} + +nsresult nsHttpConnection::MoveTransactionsToSpdy( + nsresult status, nsTArray<RefPtr<nsAHttpTransaction> >& list) { + if (NS_FAILED(status)) { // includes NS_ERROR_NOT_IMPLEMENTED + MOZ_ASSERT(list.IsEmpty(), "sub transaction list not empty"); + + // If this transaction is used to drive websocket, we reset it to put it in + // the pending queue. Once we know if the server supports websocket or not, + // the pending queue will be processed. + nsHttpTransaction* trans = mTransaction->QueryHttpTransaction(); + if (trans && trans->IsWebsocketUpgrade()) { + LOG(("nsHttpConnection resetting transaction for websocket upgrade")); + // websocket upgrade needs NonSticky for transaction reset + mTransaction->MakeNonSticky(); + ResetTransaction(std::move(mTransaction)); + mTransaction = nullptr; + return NS_OK; + } + + // This is ok - treat mTransaction as a single real request. + // Wrap the old http transaction into the new spdy session + // as the first stream. + LOG( + ("nsHttpConnection::MoveTransactionsToSpdy moves single transaction %p " + "into SpdySession %p\n", + mTransaction.get(), mSpdySession.get())); + nsresult rv = AddTransaction(mTransaction, mPriority); + if (NS_FAILED(rv)) { + return rv; + } + } else { + int32_t count = list.Length(); + + LOG( + ("nsHttpConnection::MoveTransactionsToSpdy moving transaction list " + "len=%d " + "into SpdySession %p\n", + count, mSpdySession.get())); + + if (!count) { + mTransaction->Close(NS_ERROR_ABORT); + return NS_ERROR_ABORT; + } + + for (int32_t index = 0; index < count; ++index) { + RefPtr<nsAHttpTransaction> transaction = list[index]; + nsHttpTransaction* trans = transaction->QueryHttpTransaction(); + if (trans && trans->IsWebsocketUpgrade()) { + LOG(("nsHttpConnection resetting a transaction for websocket upgrade")); + // websocket upgrade needs NonSticky for transaction reset + transaction->MakeNonSticky(); + ResetTransaction(std::move(transaction)); + transaction = nullptr; + continue; + } + nsresult rv = AddTransaction(list[index], mPriority); + if (NS_FAILED(rv)) { + return rv; + } + } + } + + return NS_OK; +} + +void nsHttpConnection::Start0RTTSpdy(SpdyVersion spdyVersion) { + LOG(("nsHttpConnection::Start0RTTSpdy [this=%p]", this)); + + MOZ_ASSERT(OnSocketThread(), "not on socket thread"); + + mDid0RTTSpdy = true; + mUsingSpdyVersion = spdyVersion; + mEverUsedSpdy = true; + mSpdySession = + ASpdySession::NewSpdySession(spdyVersion, mSocketTransport, true); + + if (mTransaction) { + nsTArray<RefPtr<nsAHttpTransaction> > list; + nsresult rv = TryTakeSubTransactions(list); + if (NS_FAILED(rv) && rv != NS_ERROR_NOT_IMPLEMENTED) { + LOG( + ("nsHttpConnection::Start0RTTSpdy [this=%p] failed taking " + "subtransactions rv=%" PRIx32, + this, static_cast<uint32_t>(rv))); + return; + } + + rv = MoveTransactionsToSpdy(rv, list); + if (NS_FAILED(rv)) { + LOG( + ("nsHttpConnection::Start0RTTSpdy [this=%p] failed moving " + "transactions rv=%" PRIx32, + this, static_cast<uint32_t>(rv))); + return; + } + } + + mTransaction = mSpdySession; +} + +void nsHttpConnection::StartSpdy(nsITLSSocketControl* sslControl, + SpdyVersion spdyVersion) { + LOG(("nsHttpConnection::StartSpdy [this=%p, mDid0RTTSpdy=%d]\n", this, + mDid0RTTSpdy)); + + MOZ_ASSERT(OnSocketThread(), "not on socket thread"); + MOZ_ASSERT(!mSpdySession || mDid0RTTSpdy); + + mUsingSpdyVersion = spdyVersion; + mEverUsedSpdy = true; + if (sslControl) { + sslControl->SetDenyClientCert(true); + } + + if (!mDid0RTTSpdy) { + mSpdySession = + ASpdySession::NewSpdySession(spdyVersion, mSocketTransport, false); + } + + if (!mReportedSpdy) { + mReportedSpdy = true; + // See bug 1797729. + // It's possible that we already have a HTTP/3 connection that can be + // coleased with this connection. We should avoid coalescing with the + // existing HTTP/3 connection if the transaction doesn't allow to use + // HTTP/3. + gHttpHandler->ConnMgr()->ReportSpdyConnection(this, true, + mTransactionDisallowHttp3); + } + + // Setting the connection as reused allows some transactions that fail + // with NS_ERROR_NET_RESET to be restarted and SPDY uses that code + // to handle clean rejections (such as those that arrived after + // a server goaway was generated). + mIsReused = true; + + // If mTransaction is a muxed object it might represent + // several requests. If so, we need to unpack that and + // pack them all into a new spdy session. + + nsTArray<RefPtr<nsAHttpTransaction> > list; + nsresult status = NS_OK; + if (!mDid0RTTSpdy && mTransaction) { + status = TryTakeSubTransactions(list); + + if (NS_FAILED(status) && status != NS_ERROR_NOT_IMPLEMENTED) { + return; + } + } + + if (NeedSpdyTunnel()) { + LOG3( + ("nsHttpConnection::StartSpdy %p Connecting To a HTTP/2 " + "Proxy and Need Connect", + this)); + SetTunnelSetupDone(); + } + + nsresult rv = NS_OK; + bool spdyProxy = mConnInfo->UsingHttpsProxy() && mConnInfo->UsingConnect() && + !mHasTLSTransportLayer; + if (spdyProxy) { + RefPtr<nsHttpConnectionInfo> wildCardProxyCi; + rv = mConnInfo->CreateWildCard(getter_AddRefs(wildCardProxyCi)); + MOZ_ASSERT(NS_SUCCEEDED(rv)); + gHttpHandler->ConnMgr()->MoveToWildCardConnEntry(mConnInfo, wildCardProxyCi, + this); + mConnInfo = wildCardProxyCi; + MOZ_ASSERT(mConnInfo); + } + + if (!mDid0RTTSpdy && mTransaction) { + if (spdyProxy) { + if (NS_FAILED(status)) { + // proxy upgrade needs Restartable for transaction reset + // note that using NonSticky here won't work because it breaks + // netwerk/test/unit/test_websocket_server.js - h1 ws with h2 proxy + mTransaction->MakeRestartable(); + ResetTransaction(std::move(mTransaction)); + mTransaction = nullptr; + } else { + for (auto trans : list) { + if (!mSpdySession->Connection()) { + mSpdySession->SetConnection(trans->Connection()); + } + trans->SetConnection(nullptr); + trans->DoNotRemoveAltSvc(); + trans->Close(NS_ERROR_NET_RESET); + } + } + } else { + rv = MoveTransactionsToSpdy(status, list); + if (NS_FAILED(rv)) { + return; + } + } + } + + // Disable TCP Keepalives - use SPDY ping instead. + rv = DisableTCPKeepalives(); + if (NS_FAILED(rv)) { + LOG( + ("nsHttpConnection::StartSpdy [%p] DisableTCPKeepalives failed " + "rv[0x%" PRIx32 "]", + this, static_cast<uint32_t>(rv))); + } + + mIdleTimeout = gHttpHandler->SpdyTimeout() * mDefaultTimeoutFactor; + + mTransaction = mSpdySession; + + if (mDontReuse) { + mSpdySession->DontReuse(); + } +} + +void nsHttpConnection::PostProcessNPNSetup(bool handshakeSucceeded, + bool hasSecurityInfo, + bool earlyDataUsed) { + if (mTransaction) { + mTransaction->OnTransportStatus(mSocketTransport, + NS_NET_STATUS_TLS_HANDSHAKE_ENDED, 0); + } + + // this is happening after the bootstrap was originally written to. so update + // it. + if (mTransaction && mTransaction->QueryNullTransaction() && + (mBootstrappedTimings.secureConnectionStart.IsNull() || + mBootstrappedTimings.tcpConnectEnd.IsNull())) { + mBootstrappedTimings.secureConnectionStart = + mTransaction->QueryNullTransaction()->GetSecureConnectionStart(); + mBootstrappedTimings.tcpConnectEnd = + mTransaction->QueryNullTransaction()->GetTcpConnectEnd(); + } + + if (hasSecurityInfo) { + mBootstrappedTimings.connectEnd = TimeStamp::Now(); + } + + if (earlyDataUsed) { + // Didn't get 0RTT OK, back out of the "attempting 0RTT" state + LOG(("nsHttpConnection::PostProcessNPNSetup [this=%p] 0rtt failed", this)); + if (mTransaction && NS_FAILED(mTransaction->Finish0RTT(true, true))) { + mTransaction->Close(NS_ERROR_NET_RESET); + } + mContentBytesWritten0RTT = 0; + if (mDid0RTTSpdy) { + Reset0RttForSpdy(); + } + } + + if (hasSecurityInfo) { + // Telemetry for tls failure rate with and without esni; + bool echConfigUsed = false; + mSocketTransport->GetEchConfigUsed(&echConfigUsed); + TlsHandshakeResult result = + echConfigUsed + ? (handshakeSucceeded ? TlsHandshakeResult::EchConfigSuccessful + : TlsHandshakeResult::EchConfigFailed) + : (handshakeSucceeded ? TlsHandshakeResult::NoEchConfigSuccessful + : TlsHandshakeResult::NoEchConfigFailed); + Telemetry::Accumulate(Telemetry::ECHCONFIG_SUCCESS_RATE, result); + } +} + +void nsHttpConnection::Reset0RttForSpdy() { + // Reset the work done by Start0RTTSpdy + mUsingSpdyVersion = SpdyVersion::NONE; + mTransaction = nullptr; + mSpdySession = nullptr; + // We have to reset this here, just in case we end up starting spdy again, + // so it can actually do everything it needs to do. + mDid0RTTSpdy = false; +} + +// called on the socket thread +nsresult nsHttpConnection::Activate(nsAHttpTransaction* trans, uint32_t caps, + int32_t pri) { + MOZ_ASSERT(OnSocketThread(), "not on socket thread"); + LOG1(("nsHttpConnection::Activate [this=%p trans=%p caps=%x]\n", this, trans, + caps)); + + if (!mExperienced && !trans->IsNullTransaction()) { + if (mTlsHandshaker->NPNComplete()) { + mExperienced = true; + } + if (mBootstrappedTimingsSet) { + mBootstrappedTimingsSet = false; + nsHttpTransaction* hTrans = trans->QueryHttpTransaction(); + if (hTrans) { + hTrans->BootstrapTimings(mBootstrappedTimings); + SetUrgentStartPreferred(hTrans->GetClassOfService().Flags() & + nsIClassOfService::UrgentStart); + } + } + mBootstrappedTimings = TimingStruct(); + } + + if (caps & NS_HTTP_LARGE_KEEPALIVE) { + mDefaultTimeoutFactor = StaticPrefs::network_http_largeKeepaliveFactor(); + } + + mTransactionCaps = caps; + mPriority = pri; + if (mTransaction && (mUsingSpdyVersion != SpdyVersion::NONE)) { + return AddTransaction(trans, pri); + } + + NS_ENSURE_ARG_POINTER(trans); + NS_ENSURE_TRUE(!mTransaction, NS_ERROR_IN_PROGRESS); + + // reset the read timers to wash away any idle time + mLastWriteTime = mLastReadTime = PR_IntervalNow(); + + // Connection failures are Activated() just like regular transacions. + // If we don't have a confirmation of a connected socket then test it + // with a write() to get relevant error code. + if (NS_FAILED(mErrorBeforeConnect)) { + mSocketOutCondition = mErrorBeforeConnect; + mTransaction = trans; + CloseTransaction(mTransaction, mSocketOutCondition); + return mSocketOutCondition; + } + + if (!mConnectedTransport) { + uint32_t count; + mSocketOutCondition = NS_ERROR_FAILURE; + if (mSocketOut) { + mSocketOutCondition = mSocketOut->Write("", 0, &count); + } + if (NS_FAILED(mSocketOutCondition) && + mSocketOutCondition != NS_BASE_STREAM_WOULD_BLOCK) { + LOG(("nsHttpConnection::Activate [this=%p] Bad Socket %" PRIx32 "\n", + this, static_cast<uint32_t>(mSocketOutCondition))); + mSocketOut->AsyncWait(nullptr, 0, 0, nullptr); + mTransaction = trans; + CloseTransaction(mTransaction, mSocketOutCondition); + return mSocketOutCondition; + } + } + + // Update security callbacks + nsCOMPtr<nsIInterfaceRequestor> callbacks; + trans->GetSecurityCallbacks(getter_AddRefs(callbacks)); + SetSecurityCallbacks(callbacks); + mTlsHandshaker->SetupSSL(mInSpdyTunnel, mForcePlainText); + + // take ownership of the transaction + mTransaction = trans; + + MOZ_ASSERT(!mIdleMonitoring, "Activating a connection with an Idle Monitor"); + mIdleMonitoring = false; + + // set mKeepAlive according to what will be requested + mKeepAliveMask = mKeepAlive = (caps & NS_HTTP_ALLOW_KEEPALIVE); + + mTransactionDisallowHttp3 |= (caps & NS_HTTP_DISALLOW_HTTP3); + + // need to handle HTTP CONNECT tunnels if this is the first time if + // we are tunneling through a proxy + nsresult rv = CheckTunnelIsNeeded(); + if (NS_FAILED(rv)) goto failed_activation; + + // Clear the per activation counter + mCurrentBytesRead = 0; + + // The overflow state is not needed between activations + mInputOverflow = nullptr; + + mResponseTimeoutEnabled = gHttpHandler->ResponseTimeoutEnabled() && + mTransaction->ResponseTimeout() > 0 && + mTransaction->ResponseTimeoutEnabled(); + + rv = StartShortLivedTCPKeepalives(); + if (NS_FAILED(rv)) { + LOG( + ("nsHttpConnection::Activate [%p] " + "StartShortLivedTCPKeepalives failed rv[0x%" PRIx32 "]", + this, static_cast<uint32_t>(rv))); + } + + trans->OnActivated(); + + rv = OnOutputStreamReady(mSocketOut); + + if (NS_SUCCEEDED(rv) && mContinueHandshakeDone) { + mContinueHandshakeDone(); + } + mContinueHandshakeDone = nullptr; + +failed_activation: + if (NS_FAILED(rv)) { + mTransaction = nullptr; + } + + return rv; +} + +nsresult nsHttpConnection::AddTransaction(nsAHttpTransaction* httpTransaction, + int32_t priority) { + MOZ_ASSERT(OnSocketThread(), "not on socket thread"); + MOZ_ASSERT(mSpdySession && (mUsingSpdyVersion != SpdyVersion::NONE), + "AddTransaction to live http connection without spdy/quic"); + + // If this is a wild card nshttpconnection (i.e. a spdy proxy) then + // it is important to start the stream using the specific connection + // info of the transaction to ensure it is routed on the right tunnel + + nsHttpConnectionInfo* transCI = httpTransaction->ConnectionInfo(); + + bool needTunnel = transCI->UsingHttpsProxy(); + needTunnel = needTunnel && !mHasTLSTransportLayer; + needTunnel = needTunnel && transCI->UsingConnect(); + needTunnel = needTunnel && httpTransaction->QueryHttpTransaction(); + + // Let the transaction know that the tunnel is already established and we + // don't need to setup the tunnel again. + if (transCI->UsingConnect() && mEverUsedSpdy && mHasTLSTransportLayer) { + httpTransaction->OnProxyConnectComplete(200); + } + + LOG(("nsHttpConnection::AddTransaction [this=%p] for %s%s", this, + mSpdySession ? "SPDY" : "QUIC", needTunnel ? " over tunnel" : "")); + + if (mSpdySession) { + if (!mSpdySession->AddStream(httpTransaction, priority, mCallbacks)) { + MOZ_ASSERT(false); // this cannot happen! + httpTransaction->Close(NS_ERROR_ABORT); + return NS_ERROR_FAILURE; + } + } + + Unused << ResumeSend(); + return NS_OK; +} + +nsresult nsHttpConnection::CreateTunnelStream( + nsAHttpTransaction* httpTransaction, nsHttpConnection** aHttpConnection, + bool aIsWebSocket) { + if (!mSpdySession) { + return NS_ERROR_UNEXPECTED; + } + + RefPtr<nsHttpConnection> conn = mSpdySession->CreateTunnelStream( + httpTransaction, mCallbacks, mRtt, aIsWebSocket); + // We need to store the refrence of the Http2Session in the tunneled + // connection, so when nsHttpConnection::DontReuse is called the Http2Session + // can't be reused. + if (aIsWebSocket) { + LOG( + ("nsHttpConnection::CreateTunnelStream %p Set h2 session %p to " + "tunneled conn %p", + this, mSpdySession.get(), conn.get())); + conn->mWebSocketHttp2Session = mSpdySession; + } + conn.forget(aHttpConnection); + return NS_OK; +} + +void nsHttpConnection::Close(nsresult reason, bool aIsShutdown) { + LOG(("nsHttpConnection::Close [this=%p reason=%" PRIx32 "]\n", this, + static_cast<uint32_t>(reason))); + + MOZ_ASSERT(OnSocketThread(), "not on socket thread"); + mTlsHandshaker->NotifyClose(); + mContinueHandshakeDone = nullptr; + mWebSocketHttp2Session = nullptr; + // Ensure TCP keepalive timer is stopped. + if (mTCPKeepaliveTransitionTimer) { + mTCPKeepaliveTransitionTimer->Cancel(); + mTCPKeepaliveTransitionTimer = nullptr; + } + if (mForceSendTimer) { + mForceSendTimer->Cancel(); + mForceSendTimer = nullptr; + } + + if (!mTrafficCategory.IsEmpty()) { + HttpTrafficAnalyzer* hta = gHttpHandler->GetHttpTrafficAnalyzer(); + if (hta) { + hta->IncrementHttpConnection(std::move(mTrafficCategory)); + MOZ_ASSERT(mTrafficCategory.IsEmpty()); + } + } + + nsCOMPtr<nsITLSSocketControl> tlsSocketControl; + GetTLSSocketControl(getter_AddRefs(tlsSocketControl)); + if (tlsSocketControl) { + tlsSocketControl->SetHandshakeCallbackListener(nullptr); + } + + if (NS_FAILED(reason)) { + if (mIdleMonitoring) EndIdleMonitoring(); + + // The connection and security errors clear out alt-svc mappings + // in case any previously validated ones are now invalid + if (((reason == NS_ERROR_NET_RESET) || + (NS_ERROR_GET_MODULE(reason) == NS_ERROR_MODULE_SECURITY)) && + mConnInfo && !(mTransactionCaps & NS_HTTP_ERROR_SOFTLY)) { + gHttpHandler->ClearHostMapping(mConnInfo); + } + if (mTlsHandshaker->EarlyDataWasAvailable() && + SecurityErrorThatMayNeedRestart(reason)) { + gHttpHandler->Exclude0RttTcp(mConnInfo); + } + + if (mSocketTransport) { + mSocketTransport->SetEventSink(nullptr, nullptr); + + // If there are bytes sitting in the input queue then read them + // into a junk buffer to avoid generating a tcp rst by closing a + // socket with data pending. TLS is a classic case of this where + // a Alert record might be superfulous to a clean HTTP/SPDY shutdown. + // Never block to do this and limit it to a small amount of data. + // During shutdown just be fast! + if (mSocketIn && !aIsShutdown && !mInSpdyTunnel) { + char buffer[4000]; + uint32_t count, total = 0; + nsresult rv; + do { + rv = mSocketIn->Read(buffer, 4000, &count); + if (NS_SUCCEEDED(rv)) total += count; + } while (NS_SUCCEEDED(rv) && count > 0 && total < 64000); + LOG(("nsHttpConnection::Close drained %d bytes\n", total)); + } + + mSocketTransport->SetSecurityCallbacks(nullptr); + mSocketTransport->Close(reason); + if (mSocketOut) mSocketOut->AsyncWait(nullptr, 0, 0, nullptr); + } + mKeepAlive = false; + } +} + +void nsHttpConnection::MarkAsDontReuse() { + LOG(("nsHttpConnection::MarkAsDontReuse %p\n", this)); + mKeepAliveMask = false; + mKeepAlive = false; + mDontReuse = true; + mIdleTimeout = 0; +} + +void nsHttpConnection::DontReuse() { + LOG(("nsHttpConnection::DontReuse %p spdysession=%p\n", this, + mSpdySession.get())); + MarkAsDontReuse(); + if (mSpdySession) { + mSpdySession->DontReuse(); + } else if (mWebSocketHttp2Session) { + LOG(("nsHttpConnection::DontReuse %p mWebSocketHttp2Session=%p\n", this, + mWebSocketHttp2Session.get())); + mWebSocketHttp2Session->DontReuse(); + } +} + +bool nsHttpConnection::TestJoinConnection(const nsACString& hostname, + int32_t port) { + if (mSpdySession && CanDirectlyActivate()) { + return mSpdySession->TestJoinConnection(hostname, port); + } + + return false; +} + +bool nsHttpConnection::JoinConnection(const nsACString& hostname, + int32_t port) { + if (mSpdySession && CanDirectlyActivate()) { + return mSpdySession->JoinConnection(hostname, port); + } + + return false; +} + +bool nsHttpConnection::CanReuse() { + if (mDontReuse || !mRemainingConnectionUses) { + return false; + } + + if ((mTransaction ? (mTransaction->IsDone() ? 0U : 1U) : 0U) >= + mRemainingConnectionUses) { + return false; + } + + bool canReuse; + if (mSpdySession) { + canReuse = mSpdySession->CanReuse(); + } else { + canReuse = IsKeepAlive(); + } + + canReuse = canReuse && (IdleTime() < mIdleTimeout) && IsAlive(); + + // An idle persistent connection should not have data waiting to be read + // before a request is sent. Data here is likely a 408 timeout response + // which we would deal with later on through the restart logic, but that + // path is more expensive than just closing the socket now. + + uint64_t dataSize; + if (canReuse && mSocketIn && (mUsingSpdyVersion == SpdyVersion::NONE) && + mHttp1xTransactionCount && + NS_SUCCEEDED(mSocketIn->Available(&dataSize)) && dataSize) { + LOG( + ("nsHttpConnection::CanReuse %p %s" + "Socket not reusable because read data pending (%" PRIu64 ") on it.\n", + this, mConnInfo->Origin(), dataSize)); + canReuse = false; + } + return canReuse; +} + +bool nsHttpConnection::CanDirectlyActivate() { + // return true if a new transaction can be addded to ths connection at any + // time through Activate(). In practice this means this is a healthy SPDY + // connection with room for more concurrent streams. + + return UsingSpdy() && CanReuse() && mSpdySession && + mSpdySession->RoomForMoreStreams(); +} + +PRIntervalTime nsHttpConnection::IdleTime() { + return mSpdySession ? mSpdySession->IdleTime() + : (PR_IntervalNow() - mLastReadTime); +} + +// returns the number of seconds left before the allowable idle period +// expires, or 0 if the period has already expied. +uint32_t nsHttpConnection::TimeToLive() { + LOG(("nsHttpConnection::TTL: %p %s idle %d timeout %d\n", this, + mConnInfo->Origin(), IdleTime(), mIdleTimeout)); + + if (IdleTime() >= mIdleTimeout) { + return 0; + } + + uint32_t timeToLive = PR_IntervalToSeconds(mIdleTimeout - IdleTime()); + + // a positive amount of time can be rounded to 0. Because 0 is used + // as the expiration signal, round all values from 0 to 1 up to 1. + if (!timeToLive) { + timeToLive = 1; + } + return timeToLive; +} + +bool nsHttpConnection::IsAlive() { + if (!mSocketTransport || !mConnectedTransport) return false; + + // SocketTransport::IsAlive can run the SSL state machine, so make sure + // the NPN options are set before that happens. + mTlsHandshaker->SetupSSL(mInSpdyTunnel, mForcePlainText); + + bool alive; + nsresult rv = mSocketTransport->IsAlive(&alive); + if (NS_FAILED(rv)) alive = false; + +// #define TEST_RESTART_LOGIC +#ifdef TEST_RESTART_LOGIC + if (!alive) { + LOG(("pretending socket is still alive to test restart logic\n")); + alive = true; + } +#endif + + return alive; +} + +void nsHttpConnection::SetUrgentStartPreferred(bool urgent) { + if (mExperienced && !mUrgentStartPreferredKnown) { + // Set only according the first ever dispatched non-null transaction + mUrgentStartPreferredKnown = true; + mUrgentStartPreferred = urgent; + LOG(("nsHttpConnection::SetUrgentStartPreferred [this=%p urgent=%d]", this, + urgent)); + } +} + +//---------------------------------------------------------------------------- +// nsHttpConnection::nsAHttpConnection compatible methods +//---------------------------------------------------------------------------- + +nsresult nsHttpConnection::OnHeadersAvailable(nsAHttpTransaction* trans, + nsHttpRequestHead* requestHead, + nsHttpResponseHead* responseHead, + bool* reset) { + LOG( + ("nsHttpConnection::OnHeadersAvailable [this=%p trans=%p " + "response-head=%p]\n", + this, trans, responseHead)); + + MOZ_ASSERT(OnSocketThread(), "not on socket thread"); + NS_ENSURE_ARG_POINTER(trans); + MOZ_ASSERT(responseHead, "No response head?"); + + if (mInSpdyTunnel) { + DebugOnly<nsresult> rv = + responseHead->SetHeader(nsHttp::X_Firefox_Spdy_Proxy, "true"_ns); + MOZ_ASSERT(NS_SUCCEEDED(rv)); + } + + // we won't change our keep-alive policy unless the server has explicitly + // told us to do so. + + // inspect the connection headers for keep-alive info provided the + // transaction completed successfully. In the case of a non-sensical close + // and keep-alive favor the close out of conservatism. + + bool explicitKeepAlive = false; + bool explicitClose = + responseHead->HasHeaderValue(nsHttp::Connection, "close") || + responseHead->HasHeaderValue(nsHttp::Proxy_Connection, "close"); + if (!explicitClose) { + explicitKeepAlive = + responseHead->HasHeaderValue(nsHttp::Connection, "keep-alive") || + responseHead->HasHeaderValue(nsHttp::Proxy_Connection, "keep-alive"); + } + + // deal with 408 Server Timeouts + uint16_t responseStatus = responseHead->Status(); + if (responseStatus == 408) { + // timeouts that are not caused by persistent connection reuse should + // not be retried for browser compatibility reasons. bug 907800. The + // server driven close is implicit in the 408. + explicitClose = true; + explicitKeepAlive = false; + } + + if ((responseHead->Version() < HttpVersion::v1_1) || + (requestHead->Version() < HttpVersion::v1_1)) { + // HTTP/1.0 connections are by default NOT persistent + mKeepAlive = explicitKeepAlive; + } else { + // HTTP/1.1 connections are by default persistent + mKeepAlive = !explicitClose; + } + mKeepAliveMask = mKeepAlive; + + // if this connection is persistent, then the server may send a "Keep-Alive" + // header specifying the maximum number of times the connection can be + // reused as well as the maximum amount of time the connection can be idle + // before the server will close it. we ignore the max reuse count, because + // a "keep-alive" connection is by definition capable of being reused, and + // we only care about being able to reuse it once. if a timeout is not + // specified then we use our advertized timeout value. + bool foundKeepAliveMax = false; + if (mKeepAlive) { + nsAutoCString keepAlive; + Unused << responseHead->GetHeader(nsHttp::Keep_Alive, keepAlive); + + if (mUsingSpdyVersion == SpdyVersion::NONE) { + const char* cp = nsCRT::strcasestr(keepAlive.get(), "timeout="); + if (cp) { + mIdleTimeout = PR_SecondsToInterval((uint32_t)atoi(cp + 8)); + } else { + mIdleTimeout = gHttpHandler->IdleTimeout() * mDefaultTimeoutFactor; + } + + cp = nsCRT::strcasestr(keepAlive.get(), "max="); + if (cp) { + int maxUses = atoi(cp + 4); + if (maxUses > 0) { + foundKeepAliveMax = true; + mRemainingConnectionUses = static_cast<uint32_t>(maxUses); + } + } + } + + LOG(("Connection can be reused [this=%p idle-timeout=%usec]\n", this, + PR_IntervalToSeconds(mIdleTimeout))); + } + + if (!foundKeepAliveMax && mRemainingConnectionUses && + (mUsingSpdyVersion == SpdyVersion::NONE)) { + --mRemainingConnectionUses; + } + + switch (mState) { + case HttpConnectionState::SETTING_UP_TUNNEL: { + nsHttpTransaction* trans = mTransaction->QueryHttpTransaction(); + // Distinguish SETTING_UP_TUNNEL for proxy or websocket via proxy + if (trans && trans->IsWebsocketUpgrade() && + trans->GetProxyConnectResponseCode() == 200) { + HandleWebSocketResponse(requestHead, responseHead, responseStatus); + } else { + HandleTunnelResponse(responseStatus, reset); + } + break; + } + default: + if (requestHead->HasHeader(nsHttp::Upgrade)) { + HandleWebSocketResponse(requestHead, responseHead, responseStatus); + } else if (responseStatus == 101) { + // We got an 101 but we are not asking of a WebSsocket? + Close(NS_ERROR_ABORT); + } + } + + mLastHttpResponseVersion = responseHead->Version(); + + return NS_OK; +} + +void nsHttpConnection::HandleTunnelResponse(uint16_t responseStatus, + bool* reset) { + LOG(("nsHttpConnection::HandleTunnelResponse()")); + MOZ_ASSERT(TunnelSetupInProgress()); + MOZ_ASSERT(mProxyConnectStream); + MOZ_ASSERT(mUsingSpdyVersion == SpdyVersion::NONE, + "SPDY NPN Complete while using proxy connect stream"); + // If we're doing a proxy connect, we need to check whether or not + // it was successful. If so, we have to reset the transaction and step-up + // the socket connection if using SSL. Finally, we have to wake up the + // socket write request. + + if (responseStatus == 200) { + ChangeState(HttpConnectionState::REQUEST); + } + mProxyConnectStream = nullptr; + bool isHttps = mTransaction ? mTransaction->ConnectionInfo()->EndToEndSSL() + : mConnInfo->EndToEndSSL(); + bool onlyConnect = mTransactionCaps & NS_HTTP_CONNECT_ONLY; + + mTransaction->OnProxyConnectComplete(responseStatus); + if (responseStatus == 200) { + LOG(("proxy CONNECT succeeded! endtoendssl=%d onlyconnect=%d\n", isHttps, + onlyConnect)); + // If we're only connecting, we don't need to reset the transaction + // state. We need to upgrade the socket now without doing the actual + // http request. + if (!onlyConnect) { + *reset = true; + } + nsresult rv; + // CONNECT only flag doesn't do the tls setup. https here only + // ensures a proxy tunnel was used not that tls is setup. + if (isHttps) { + if (!onlyConnect) { + if (mConnInfo->UsingHttpsProxy()) { + LOG(("%p new TLSFilterTransaction %s %d\n", this, mConnInfo->Origin(), + mConnInfo->OriginPort())); + SetupSecondaryTLS(); + } + + rv = mTlsHandshaker->InitSSLParams(false, true); + LOG(("InitSSLParams [rv=%" PRIx32 "]\n", static_cast<uint32_t>(rv))); + } else { + // We have an https protocol but the CONNECT only flag was + // specified. The consumer only wants a raw socket to the + // proxy. We have to mark this as complete to finish the + // transaction and be upgraded. OnSocketReadable() uses this + // to detect an inactive tunnel and blocks completion. + mTlsHandshaker->SetNPNComplete(); + } + } + rv = mSocketOut->AsyncWait(this, 0, 0, nullptr); + // XXX what if this fails -- need to handle this error + MOZ_ASSERT(NS_SUCCEEDED(rv), "mSocketOut->AsyncWait failed"); + } else { + LOG(("proxy CONNECT failed! endtoendssl=%d onlyconnect=%d\n", isHttps, + onlyConnect)); + mTransaction->SetProxyConnectFailed(); + } +} + +void nsHttpConnection::HandleWebSocketResponse(nsHttpRequestHead* requestHead, + nsHttpResponseHead* responseHead, + uint16_t responseStatus) { + LOG(("nsHttpConnection::HandleWebSocketResponse()")); + + // Don't use persistent connection for Upgrade unless there's an auth failure: + // some proxies expect to see auth response on persistent connection. + // Also allow persistent conn for h2, as we don't want to waste connections + // for multiplexed upgrades. + if (responseStatus != 401 && responseStatus != 407 && !mSpdySession) { + LOG(("HTTP Upgrade in play - disable keepalive for http/1.x\n")); + MarkAsDontReuse(); + } + + // the new Http2StreamWebSocket breaks wpt on + // h2 basic authentication 401, due to MakeSticky() work around + // so we DontReuse() in this circumstance + if (mInSpdyTunnel && (responseStatus == 401 || responseStatus == 407)) { + MarkAsDontReuse(); + return; + } + + if (responseStatus == 101) { + nsAutoCString upgradeReq; + bool hasUpgradeReq = + NS_SUCCEEDED(requestHead->GetHeader(nsHttp::Upgrade, upgradeReq)); + nsAutoCString upgradeResp; + bool hasUpgradeResp = + NS_SUCCEEDED(responseHead->GetHeader(nsHttp::Upgrade, upgradeResp)); + if (!hasUpgradeReq || !hasUpgradeResp || + !nsHttp::FindToken(upgradeResp.get(), upgradeReq.get(), + HTTP_HEADER_VALUE_SEPS)) { + LOG(("HTTP 101 Upgrade header mismatch req = %s, resp = %s\n", + upgradeReq.get(), + !upgradeResp.IsEmpty() ? upgradeResp.get() + : "RESPONSE's nsHttp::Upgrade is empty")); + Close(NS_ERROR_ABORT); + } else { + LOG(("HTTP Upgrade Response to %s\n", upgradeResp.get())); + } + } +} + +bool nsHttpConnection::IsReused() { + if (mIsReused) return true; + if (!mConsiderReusedAfterInterval) return false; + + // ReusedAfter allows a socket to be consider reused only after a certain + // interval of time has passed + return (PR_IntervalNow() - mConsiderReusedAfterEpoch) >= + mConsiderReusedAfterInterval; +} + +void nsHttpConnection::SetIsReusedAfter(uint32_t afterMilliseconds) { + mConsiderReusedAfterEpoch = PR_IntervalNow(); + mConsiderReusedAfterInterval = PR_MillisecondsToInterval(afterMilliseconds); +} + +nsresult nsHttpConnection::TakeTransport(nsISocketTransport** aTransport, + nsIAsyncInputStream** aInputStream, + nsIAsyncOutputStream** aOutputStream) { + if (mUsingSpdyVersion != SpdyVersion::NONE) return NS_ERROR_FAILURE; + if (mTransaction && !mTransaction->IsDone()) return NS_ERROR_IN_PROGRESS; + if (!(mSocketTransport && mSocketIn && mSocketOut)) { + return NS_ERROR_NOT_INITIALIZED; + } + + if (mInputOverflow) mSocketIn = mInputOverflow.forget(); + + // Change TCP Keepalive frequency to long-lived if currently short-lived. + if (mTCPKeepaliveConfig == kTCPKeepaliveShortLivedConfig) { + if (mTCPKeepaliveTransitionTimer) { + mTCPKeepaliveTransitionTimer->Cancel(); + mTCPKeepaliveTransitionTimer = nullptr; + } + nsresult rv = StartLongLivedTCPKeepalives(); + LOG( + ("nsHttpConnection::TakeTransport [%p] calling " + "StartLongLivedTCPKeepalives", + this)); + if (NS_FAILED(rv)) { + LOG( + ("nsHttpConnection::TakeTransport [%p] " + "StartLongLivedTCPKeepalives failed rv[0x%" PRIx32 "]", + this, static_cast<uint32_t>(rv))); + } + } + + if (mHasTLSTransportLayer) { + RefPtr<TLSTransportLayer> tlsTransportLayer = + do_QueryObject(mSocketTransport); + if (tlsTransportLayer) { + // This transport layer is no longer owned by this connection. + tlsTransportLayer->ReleaseOwner(); + } + } + + mSocketTransport->SetSecurityCallbacks(nullptr); + mSocketTransport->SetEventSink(nullptr, nullptr); + + mSocketTransport.forget(aTransport); + mSocketIn.forget(aInputStream); + mSocketOut.forget(aOutputStream); + + return NS_OK; +} + +uint32_t nsHttpConnection::ReadTimeoutTick(PRIntervalTime now) { + MOZ_ASSERT(OnSocketThread(), "not on socket thread"); + + // make sure timer didn't tick before Activate() + if (!mTransaction) return UINT32_MAX; + + // Spdy implements some timeout handling using the SPDY ping frame. + if (mSpdySession) { + return mSpdySession->ReadTimeoutTick(now); + } + + uint32_t nextTickAfter = UINT32_MAX; + // Timeout if the response is taking too long to arrive. + if (mResponseTimeoutEnabled) { + NS_WARNING_ASSERTION( + gHttpHandler->ResponseTimeoutEnabled(), + "Timing out a response, but response timeout is disabled!"); + + PRIntervalTime initialResponseDelta = now - mLastWriteTime; + + if (initialResponseDelta > mTransaction->ResponseTimeout()) { + LOG(("canceling transaction: no response for %ums: timeout is %dms\n", + PR_IntervalToMilliseconds(initialResponseDelta), + PR_IntervalToMilliseconds(mTransaction->ResponseTimeout()))); + + mResponseTimeoutEnabled = false; + + // This will also close the connection + CloseTransaction(mTransaction, NS_ERROR_NET_TIMEOUT); + return UINT32_MAX; + } + nextTickAfter = PR_IntervalToSeconds(mTransaction->ResponseTimeout()) - + PR_IntervalToSeconds(initialResponseDelta); + nextTickAfter = std::max(nextTickAfter, 1U); + } + + if (!mTlsHandshaker->NPNComplete()) { + // We can reuse mLastWriteTime here, because it is set when the + // connection is activated and only change when a transaction + // succesfullu write to the socket and this can only happen after + // the TLS handshake is done. + PRIntervalTime initialTLSDelta = now - mLastWriteTime; + if (initialTLSDelta > + PR_MillisecondsToInterval(gHttpHandler->TLSHandshakeTimeout())) { + LOG( + ("canceling transaction: tls handshake takes too long: tls handshake " + "last %ums, timeout is %dms.", + PR_IntervalToMilliseconds(initialTLSDelta), + gHttpHandler->TLSHandshakeTimeout())); + + // This will also close the connection + CloseTransaction(mTransaction, NS_ERROR_NET_TIMEOUT); + return UINT32_MAX; + } + } + + return nextTickAfter; +} + +void nsHttpConnection::UpdateTCPKeepalive(nsITimer* aTimer, void* aClosure) { + MOZ_ASSERT(aTimer); + MOZ_ASSERT(aClosure); + + nsHttpConnection* self = static_cast<nsHttpConnection*>(aClosure); + + if (NS_WARN_IF(self->mUsingSpdyVersion != SpdyVersion::NONE)) { + return; + } + + // Do not reduce keepalive probe frequency for idle connections. + if (self->mIdleMonitoring) { + return; + } + + nsresult rv = self->StartLongLivedTCPKeepalives(); + if (NS_FAILED(rv)) { + LOG( + ("nsHttpConnection::UpdateTCPKeepalive [%p] " + "StartLongLivedTCPKeepalives failed rv[0x%" PRIx32 "]", + self, static_cast<uint32_t>(rv))); + } +} + +void nsHttpConnection::GetTLSSocketControl( + nsITLSSocketControl** tlsSocketControl) { + MOZ_ASSERT(OnSocketThread(), "not on socket thread"); + LOG(("nsHttpConnection::GetTLSSocketControl trans=%p socket=%p\n", + mTransaction.get(), mSocketTransport.get())); + + *tlsSocketControl = nullptr; + + if (mTransaction && NS_SUCCEEDED(mTransaction->GetTransactionTLSSocketControl( + tlsSocketControl))) { + return; + } + + if (mSocketTransport && + NS_SUCCEEDED(mSocketTransport->GetTlsSocketControl(tlsSocketControl))) { + return; + } +} + +nsresult nsHttpConnection::PushBack(const char* data, uint32_t length) { + LOG(("nsHttpConnection::PushBack [this=%p, length=%d]\n", this, length)); + + if (mInputOverflow) { + NS_ERROR("nsHttpConnection::PushBack only one buffer supported"); + return NS_ERROR_UNEXPECTED; + } + + mInputOverflow = new nsPreloadedStream(mSocketIn, data, length); + return NS_OK; +} + +class HttpConnectionForceIO : public Runnable { + public: + HttpConnectionForceIO(nsHttpConnection* aConn, bool doRecv) + : Runnable("net::HttpConnectionForceIO"), mConn(aConn), mDoRecv(doRecv) {} + + NS_IMETHOD Run() override { + MOZ_ASSERT(OnSocketThread(), "not on socket thread"); + + if (mDoRecv) { + if (!mConn->mSocketIn) return NS_OK; + return mConn->OnInputStreamReady(mConn->mSocketIn); + } + + MOZ_ASSERT(mConn->mForceSendPending); + mConn->mForceSendPending = false; + + if (!mConn->mSocketOut) { + return NS_OK; + } + return mConn->OnOutputStreamReady(mConn->mSocketOut); + } + + private: + RefPtr<nsHttpConnection> mConn; + bool mDoRecv; +}; + +nsresult nsHttpConnection::ResumeSend() { + LOG(("nsHttpConnection::ResumeSend [this=%p]\n", this)); + + MOZ_ASSERT(OnSocketThread(), "not on socket thread"); + + if (mSocketOut) { + return mSocketOut->AsyncWait(this, 0, 0, nullptr); + } + + MOZ_ASSERT_UNREACHABLE("no socket output stream"); + return NS_ERROR_UNEXPECTED; +} + +nsresult nsHttpConnection::ResumeRecv() { + LOG(("nsHttpConnection::ResumeRecv [this=%p]\n", this)); + + MOZ_ASSERT(OnSocketThread(), "not on socket thread"); + + // the mLastReadTime timestamp is used for finding slowish readers + // and can be pretty sensitive. For that reason we actually reset it + // when we ask to read (resume recv()) so that when we get called back + // with actual read data in OnSocketReadable() we are only measuring + // the latency between those two acts and not all the processing that + // may get done before the ResumeRecv() call + mLastReadTime = PR_IntervalNow(); + + if (mSocketIn) { + if (mHasTLSTransportLayer) { + RefPtr<TLSTransportLayer> tlsTransportLayer = + do_QueryObject(mSocketTransport); + if (tlsTransportLayer) { + bool hasDataToRecv = tlsTransportLayer->HasDataToRecv(); + if (hasDataToRecv && NS_SUCCEEDED(ForceRecv())) { + return NS_OK; + } + Unused << mSocketIn->AsyncWait(this, 0, 0, nullptr); + // We have to return an error here to let the underlying layer know this + // connection doesn't read any data. + return NS_BASE_STREAM_WOULD_BLOCK; + } + } + return mSocketIn->AsyncWait(this, 0, 0, nullptr); + } + + MOZ_ASSERT_UNREACHABLE("no socket input stream"); + return NS_ERROR_UNEXPECTED; +} + +void nsHttpConnection::ForceSendIO(nsITimer* aTimer, void* aClosure) { + MOZ_ASSERT(OnSocketThread(), "not on socket thread"); + nsHttpConnection* self = static_cast<nsHttpConnection*>(aClosure); + MOZ_ASSERT(aTimer == self->mForceSendTimer); + self->mForceSendTimer = nullptr; + NS_DispatchToCurrentThread(new HttpConnectionForceIO(self, false)); +} + +nsresult nsHttpConnection::MaybeForceSendIO() { + MOZ_ASSERT(OnSocketThread(), "not on socket thread"); + // due to bug 1213084 sometimes real I/O events do not get serviced when + // NSPR derived I/O events are ready and this can cause a deadlock with + // https over https proxying. Normally we would expect the write callback to + // be invoked before this timer goes off, but set it at the old windows + // tick interval (kForceDelay) as a backup for those circumstances. + static const uint32_t kForceDelay = 17; // ms + + if (mForceSendPending) { + return NS_OK; + } + MOZ_ASSERT(!mForceSendTimer); + mForceSendPending = true; + return NS_NewTimerWithFuncCallback(getter_AddRefs(mForceSendTimer), + nsHttpConnection::ForceSendIO, this, + kForceDelay, nsITimer::TYPE_ONE_SHOT, + "net::nsHttpConnection::MaybeForceSendIO"); +} + +// trigger an asynchronous read +nsresult nsHttpConnection::ForceRecv() { + LOG(("nsHttpConnection::ForceRecv [this=%p]\n", this)); + MOZ_ASSERT(OnSocketThread(), "not on socket thread"); + + return NS_DispatchToCurrentThread(new HttpConnectionForceIO(this, true)); +} + +// trigger an asynchronous write +nsresult nsHttpConnection::ForceSend() { + LOG(("nsHttpConnection::ForceSend [this=%p]\n", this)); + MOZ_ASSERT(OnSocketThread(), "not on socket thread"); + + return MaybeForceSendIO(); +} + +void nsHttpConnection::BeginIdleMonitoring() { + LOG(("nsHttpConnection::BeginIdleMonitoring [this=%p]\n", this)); + MOZ_ASSERT(OnSocketThread(), "not on socket thread"); + MOZ_ASSERT(!mTransaction, "BeginIdleMonitoring() while active"); + MOZ_ASSERT(mUsingSpdyVersion == SpdyVersion::NONE, + "Idle monitoring of spdy not allowed"); + + LOG(("Entering Idle Monitoring Mode [this=%p]", this)); + mIdleMonitoring = true; + if (mSocketIn) mSocketIn->AsyncWait(this, 0, 0, nullptr); +} + +void nsHttpConnection::EndIdleMonitoring() { + LOG(("nsHttpConnection::EndIdleMonitoring [this=%p]\n", this)); + MOZ_ASSERT(OnSocketThread(), "not on socket thread"); + MOZ_ASSERT(!mTransaction, "EndIdleMonitoring() while active"); + + if (mIdleMonitoring) { + LOG(("Leaving Idle Monitoring Mode [this=%p]", this)); + mIdleMonitoring = false; + if (mSocketIn) mSocketIn->AsyncWait(nullptr, 0, 0, nullptr); + } +} + +HttpVersion nsHttpConnection::Version() { + if (mUsingSpdyVersion != SpdyVersion::NONE) { + return HttpVersion::v2_0; + } + return mLastHttpResponseVersion; +} + +PRIntervalTime nsHttpConnection::LastWriteTime() { return mLastWriteTime; } + +//----------------------------------------------------------------------------- +// nsHttpConnection <private> +//----------------------------------------------------------------------------- + +void nsHttpConnection::CloseTransaction(nsAHttpTransaction* trans, + nsresult reason, bool aIsShutdown) { + LOG(("nsHttpConnection::CloseTransaction[this=%p trans=%p reason=%" PRIx32 + "]\n", + this, trans, static_cast<uint32_t>(reason))); + + MOZ_ASSERT(OnSocketThread(), "not on socket thread"); + + if (mCurrentBytesRead > mMaxBytesRead) mMaxBytesRead = mCurrentBytesRead; + + // mask this error code because its not a real error. + if (reason == NS_BASE_STREAM_CLOSED) reason = NS_OK; + + if (mUsingSpdyVersion != SpdyVersion::NONE) { + DontReuse(); + // if !mSpdySession then mUsingSpdyVersion must be false for canreuse() + mSpdySession->SetCleanShutdown(aIsShutdown); + mUsingSpdyVersion = SpdyVersion::NONE; + mSpdySession = nullptr; + } + + if (mTransaction) { + LOG((" closing associated mTransaction")); + mHttp1xTransactionCount += mTransaction->Http1xTransactionCount(); + + mTransaction->Close(reason); + mTransaction = nullptr; + } + + { + MutexAutoLock lock(mCallbacksLock); + mCallbacks = nullptr; + } + + if (NS_FAILED(reason) && (reason != NS_BINDING_RETARGETED)) { + Close(reason, aIsShutdown); + } + + // flag the connection as reused here for convenience sake. certainly + // it might be going away instead ;-) + mIsReused = true; +} + +bool nsHttpConnection::CheckCanWrite0RTTData() { + MOZ_ASSERT(mTlsHandshaker->EarlyDataAvailable()); + nsCOMPtr<nsITLSSocketControl> tlsSocketControl; + GetTLSSocketControl(getter_AddRefs(tlsSocketControl)); + if (!tlsSocketControl) { + return false; + } + nsCOMPtr<nsITransportSecurityInfo> securityInfo; + if (NS_FAILED( + tlsSocketControl->GetSecurityInfo(getter_AddRefs(securityInfo)))) { + return false; + } + if (!securityInfo) { + return false; + } + nsAutoCString negotiatedNPN; + // If the following code fails means that the handshake is not done + // yet, so continue writing 0RTT data. + nsresult rv = securityInfo->GetNegotiatedNPN(negotiatedNPN); + if (NS_FAILED(rv)) { + return true; + } + bool earlyDataAccepted = false; + rv = tlsSocketControl->GetEarlyDataAccepted(&earlyDataAccepted); + // If 0RTT data is accepted we can continue writing data, + // if it is reject stop writing more data. + return NS_SUCCEEDED(rv) && earlyDataAccepted; +} + +nsresult nsHttpConnection::OnReadSegment(const char* buf, uint32_t count, + uint32_t* countRead) { + LOG(("nsHttpConnection::OnReadSegment [this=%p]\n", this)); + if (count == 0) { + // some ReadSegments implementations will erroneously call the writer + // to consume 0 bytes worth of data. we must protect against this case + // or else we'd end up closing the socket prematurely. + NS_ERROR("bad ReadSegments implementation"); + return NS_ERROR_FAILURE; // stop iterating + } + + // If we are waiting for 0RTT Response, check maybe nss has finished + // handshake already. + // IsAlive() calls drive the handshake and that may cause nss and necko + // to be out of sync. + if (mTlsHandshaker->EarlyDataAvailable() && !CheckCanWrite0RTTData()) { + MOZ_DIAGNOSTIC_ASSERT(mTlsHandshaker->TlsHandshakeComplitionPending()); + LOG( + ("nsHttpConnection::OnReadSegment Do not write any data, wait" + " for EnsureNPNComplete to be called [this=%p]", + this)); + *countRead = 0; + return NS_BASE_STREAM_WOULD_BLOCK; + } + + nsresult rv = mSocketOut->Write(buf, count, countRead); + if (NS_FAILED(rv)) { + mSocketOutCondition = rv; + } else if (*countRead == 0) { + mSocketOutCondition = NS_BASE_STREAM_CLOSED; + } else { + mLastWriteTime = PR_IntervalNow(); + mSocketOutCondition = NS_OK; // reset condition + if (!TunnelSetupInProgress()) mTotalBytesWritten += *countRead; + } + + return mSocketOutCondition; +} + +nsresult nsHttpConnection::OnSocketWritable() { + LOG(("nsHttpConnection::OnSocketWritable [this=%p] host=%s\n", this, + mConnInfo->Origin())); + + nsresult rv; + uint32_t transactionBytes; + bool again = true; + + // Prevent STS thread from being blocked by single OnOutputStreamReady + // callback. + const uint32_t maxWriteAttempts = 128; + uint32_t writeAttempts = 0; + + if (mTransactionCaps & NS_HTTP_CONNECT_ONLY) { + if (!mConnInfo->UsingConnect()) { + // A CONNECT has been requested for this connection but will never + // be performed. This should never happen. + MOZ_ASSERT(false, "proxy connect will never happen"); + LOG(("return failure because proxy connect will never happen\n")); + return NS_ERROR_FAILURE; + } + + if (mState == HttpConnectionState::REQUEST) { + // Don't need to check this each write attempt since it is only + // updated after OnSocketWritable completes. + // We've already done primary tls (if needed) and sent our CONNECT. + // If we're doing a CONNECT only request there's no need to write + // the http transaction or do the SSL handshake here. + LOG(("return ok because proxy connect successful\n")); + return NS_OK; + } + } + + do { + ++writeAttempts; + rv = mSocketOutCondition = NS_OK; + transactionBytes = 0; + + switch (mState) { + case HttpConnectionState::SETTING_UP_TUNNEL: + if (mConnInfo->UsingHttpsProxy() && + !mTlsHandshaker->EnsureNPNComplete()) { + MOZ_DIAGNOSTIC_ASSERT(!mTlsHandshaker->EarlyDataAvailable()); + mSocketOutCondition = NS_BASE_STREAM_WOULD_BLOCK; + } else { + rv = SendConnectRequest(this, &transactionBytes); + } + break; + default: { + // The SSL handshake must be completed before the + // transaction->readsegments() processing can proceed because we need to + // know how to format the request differently for http/1, http/2, spdy, + // etc.. and that is negotiated with NPN/ALPN in the SSL handshake. + if (!mTlsHandshaker->EnsureNPNComplete() && + (!mTlsHandshaker->EarlyDataUsed() || + mTlsHandshaker->TlsHandshakeComplitionPending())) { + // The handshake is not done and we cannot write 0RTT data or nss has + // already finished 0RTT data. + mSocketOutCondition = NS_BASE_STREAM_WOULD_BLOCK; + } else if (!mTransaction) { + rv = NS_ERROR_FAILURE; + LOG((" No Transaction In OnSocketWritable\n")); + } else if (NS_SUCCEEDED(rv)) { + // for non spdy sessions let the connection manager know + if (!mReportedSpdy && mTlsHandshaker->NPNComplete()) { + mReportedSpdy = true; + MOZ_ASSERT(!mEverUsedSpdy); + gHttpHandler->ConnMgr()->ReportSpdyConnection(this, false, false); + } + + LOG((" writing transaction request stream\n")); + rv = mTransaction->ReadSegmentsAgain(this, + nsIOService::gDefaultSegmentSize, + &transactionBytes, &again); + if (mTlsHandshaker->EarlyDataUsed()) { + mContentBytesWritten0RTT += transactionBytes; + if (NS_FAILED(rv) && rv != NS_BASE_STREAM_WOULD_BLOCK) { + // If an error happens while writting 0RTT data, restart + // the transactiions without 0RTT. + mTlsHandshaker->FinishNPNSetup(false, true); + } + } else { + mContentBytesWritten += transactionBytes; + } + } + } + } + + LOG( + ("nsHttpConnection::OnSocketWritable %p " + "ReadSegments returned [rv=%" PRIx32 " read=%u " + "sock-cond=%" PRIx32 " again=%d]\n", + this, static_cast<uint32_t>(rv), transactionBytes, + static_cast<uint32_t>(mSocketOutCondition), again)); + + // XXX some streams return NS_BASE_STREAM_CLOSED to indicate EOF. + if (rv == NS_BASE_STREAM_CLOSED && !mTransaction->IsDone()) { + rv = NS_OK; + transactionBytes = 0; + } + + if (NS_FAILED(rv)) { + // if the transaction didn't want to write any more data, then + // wait for the transaction to call ResumeSend. + if (rv == NS_BASE_STREAM_WOULD_BLOCK) { + rv = NS_OK; + } + again = false; + } else if (NS_FAILED(mSocketOutCondition)) { + if (mSocketOutCondition == NS_BASE_STREAM_WOULD_BLOCK) { + if (!mTlsHandshaker->EarlyDataCanNotBeUsed()) { + // continue writing + // We are not going to poll for write if the handshake is in progress, + // but early data cannot be used. + rv = mSocketOut->AsyncWait(this, 0, 0, nullptr); + } + } else { + rv = mSocketOutCondition; + } + again = false; + } else if (!transactionBytes) { + rv = NS_OK; + + if (mTransaction) { // in case the ReadSegments stack called + // CloseTransaction() + // + // at this point we've written out the entire transaction, and now we + // must wait for the server's response. we manufacture a status message + // here to reflect the fact that we are waiting. this message will be + // trumped (overwritten) if the server responds quickly. + // + mTransaction->OnTransportStatus(mSocketTransport, + NS_NET_STATUS_WAITING_FOR, 0); + + rv = ResumeRecv(); // start reading + } + // When Spdy tunnel is used we need to explicitly set when a request is + // done. + if ((mState != HttpConnectionState::SETTING_UP_TUNNEL) && !mSpdySession) { + nsHttpTransaction* trans = mTransaction->QueryHttpTransaction(); + // needed for websocket over h2 (direct) + if (!trans || !trans->IsWebsocketUpgrade()) { + mRequestDone = true; + } + } + again = false; + } else if (writeAttempts >= maxWriteAttempts) { + LOG((" yield for other transactions\n")); + rv = mSocketOut->AsyncWait(this, 0, 0, nullptr); // continue writing + again = false; + } + // write more to the socket until error or end-of-request... + } while (again && gHttpHandler->Active()); + + return rv; +} + +nsresult nsHttpConnection::OnWriteSegment(char* buf, uint32_t count, + uint32_t* countWritten) { + if (count == 0) { + // some WriteSegments implementations will erroneously call the reader + // to provide 0 bytes worth of data. we must protect against this case + // or else we'd end up closing the socket prematurely. + NS_ERROR("bad WriteSegments implementation"); + return NS_ERROR_FAILURE; // stop iterating + } + + if (ChaosMode::isActive(ChaosFeature::IOAmounts) && + ChaosMode::randomUint32LessThan(2)) { + // read 1...count bytes + count = ChaosMode::randomUint32LessThan(count) + 1; + } + + nsresult rv = mSocketIn->Read(buf, count, countWritten); + if (NS_FAILED(rv)) { + mSocketInCondition = rv; + } else if (*countWritten == 0) { + mSocketInCondition = NS_BASE_STREAM_CLOSED; + } else { + mSocketInCondition = NS_OK; // reset condition + } + + return mSocketInCondition; +} + +nsresult nsHttpConnection::OnSocketReadable() { + LOG(("nsHttpConnection::OnSocketReadable [this=%p]\n", this)); + + PRIntervalTime now = PR_IntervalNow(); + PRIntervalTime delta = now - mLastReadTime; + + // Reset mResponseTimeoutEnabled to stop response timeout checks. + mResponseTimeoutEnabled = false; + + if ((mTransactionCaps & NS_HTTP_CONNECT_ONLY) && !mConnInfo->UsingConnect()) { + // A CONNECT has been requested for this connection but will never + // be performed. This should never happen. + MOZ_ASSERT(false, "proxy connect will never happen"); + LOG(("return failure because proxy connect will never happen\n")); + return NS_ERROR_FAILURE; + } + + if (mKeepAliveMask && (delta >= mMaxHangTime)) { + LOG(("max hang time exceeded!\n")); + // give the handler a chance to create a new persistent connection to + // this host if we've been busy for too long. + mKeepAliveMask = false; + Unused << gHttpHandler->ProcessPendingQ(mConnInfo); + } + + // Reduce the estimate of the time since last read by up to 1 RTT to + // accommodate exhausted sender TCP congestion windows or minor I/O delays. + mLastReadTime = now; + + nsresult rv = NS_OK; + uint32_t n; + bool again = true; + + do { + if (!TunnelSetupInProgress() && !mTlsHandshaker->EnsureNPNComplete()) { + // Unless we are setting up a tunnel via CONNECT, prevent reading + // from the socket until the results of NPN + // negotiation are known (which is determined from the write path). + // If the server speaks SPDY it is likely the readable data here is + // a spdy settings frame and without NPN it would be misinterpreted + // as HTTP/* + + LOG( + ("nsHttpConnection::OnSocketReadable %p return due to inactive " + "tunnel setup but incomplete NPN state\n", + this)); + if (mTlsHandshaker->EarlyDataAvailable() || mHasTLSTransportLayer) { + rv = ResumeRecv(); + } + break; + } + + mSocketInCondition = NS_OK; + if (!mTransaction) { + rv = NS_ERROR_FAILURE; + LOG((" No Transaction In OnSocketWritable\n")); + } else { + rv = mTransaction->WriteSegmentsAgain( + this, nsIOService::gDefaultSegmentSize, &n, &again); + } + LOG(("nsHttpConnection::OnSocketReadable %p trans->ws rv=%" PRIx32 + " n=%d socketin=%" PRIx32 "\n", + this, static_cast<uint32_t>(rv), n, + static_cast<uint32_t>(mSocketInCondition))); + if (NS_FAILED(rv)) { + // if the transaction didn't want to take any more data, then + // wait for the transaction to call ResumeRecv. + if (rv == NS_BASE_STREAM_WOULD_BLOCK) { + rv = NS_OK; + } + again = false; + } else { + mCurrentBytesRead += n; + mTotalBytesRead += n; + if (NS_FAILED(mSocketInCondition)) { + // continue waiting for the socket if necessary... + if (mSocketInCondition == NS_BASE_STREAM_WOULD_BLOCK) { + rv = ResumeRecv(); + } else { + rv = mSocketInCondition; + } + again = false; + } + } + // read more from the socket until error... + } while (again && gHttpHandler->Active()); + + return rv; +} + +void nsHttpConnection::SetupSecondaryTLS() { + MOZ_ASSERT(OnSocketThread(), "not on socket thread"); + MOZ_ASSERT(!mHasTLSTransportLayer); + LOG(("nsHttpConnection %p SetupSecondaryTLS %s %d\n", this, + mConnInfo->Origin(), mConnInfo->OriginPort())); + + nsHttpConnectionInfo* ci = nullptr; + if (mTransaction) { + ci = mTransaction->ConnectionInfo(); + } + if (!ci) { + ci = mConnInfo; + } + MOZ_ASSERT(ci); + + RefPtr<TLSTransportLayer> transportLayer = + new TLSTransportLayer(mSocketTransport, mSocketIn, mSocketOut, this); + if (transportLayer->Init(ci->Origin(), ci->OriginPort())) { + mSocketIn = transportLayer->GetInputStreamWrapper(); + mSocketOut = transportLayer->GetOutputStreamWrapper(); + mSocketTransport = transportLayer; + mHasTLSTransportLayer = true; + LOG(("Create mTLSTransportLayer %p", this)); + } +} + +void nsHttpConnection::SetInSpdyTunnel() { + mInSpdyTunnel = true; + mForcePlainText = true; +} + +// static +nsresult nsHttpConnection::MakeConnectString(nsAHttpTransaction* trans, + nsHttpRequestHead* request, + nsACString& result, bool h2ws, + bool aShouldResistFingerprinting) { + result.Truncate(); + if (!trans->ConnectionInfo()) { + return NS_ERROR_NOT_INITIALIZED; + } + + DebugOnly<nsresult> rv{}; + + rv = nsHttpHandler::GenerateHostPort( + nsDependentCString(trans->ConnectionInfo()->Origin()), + trans->ConnectionInfo()->OriginPort(), result); + MOZ_ASSERT(NS_SUCCEEDED(rv)); + + // CONNECT host:port HTTP/1.1 + request->SetMethod("CONNECT"_ns); + request->SetVersion(gHttpHandler->HttpVersion()); + if (h2ws) { + // HTTP/2 websocket CONNECT forms need the full request URI + nsAutoCString requestURI; + trans->RequestHead()->RequestURI(requestURI); + request->SetRequestURI(requestURI); + + request->SetHTTPS(trans->RequestHead()->IsHTTPS()); + } else { + request->SetRequestURI(result); + } + rv = request->SetHeader(nsHttp::User_Agent, + gHttpHandler->UserAgent(aShouldResistFingerprinting)); + MOZ_ASSERT(NS_SUCCEEDED(rv)); + + // a CONNECT is always persistent + rv = request->SetHeader(nsHttp::Proxy_Connection, "keep-alive"_ns); + MOZ_ASSERT(NS_SUCCEEDED(rv)); + rv = request->SetHeader(nsHttp::Connection, "keep-alive"_ns); + MOZ_ASSERT(NS_SUCCEEDED(rv)); + + // all HTTP/1.1 requests must include a Host header (even though it + // may seem redundant in this case; see bug 82388). + rv = request->SetHeader(nsHttp::Host, result); + MOZ_ASSERT(NS_SUCCEEDED(rv)); + + nsAutoCString val; + if (NS_SUCCEEDED( + trans->RequestHead()->GetHeader(nsHttp::Proxy_Authorization, val))) { + // we don't know for sure if this authorization is intended for the + // SSL proxy, so we add it just in case. + rv = request->SetHeader(nsHttp::Proxy_Authorization, val); + MOZ_ASSERT(NS_SUCCEEDED(rv)); + } + if ((trans->Caps() & NS_HTTP_CONNECT_ONLY) && + NS_SUCCEEDED(trans->RequestHead()->GetHeader(nsHttp::Upgrade, val))) { + // rfc7639 proposes using the ALPN header to indicate the protocol used + // in CONNECT when not used for TLS. The protocol is stored in Upgrade. + // We have to copy this header here since a new HEAD request is created + // for the CONNECT. + rv = request->SetHeader("ALPN"_ns, val); + MOZ_ASSERT(NS_SUCCEEDED(rv)); + } + + result.Truncate(); + request->Flatten(result, false); + + if (LOG1_ENABLED()) { + LOG(("nsHttpConnection::MakeConnectString for transaction=%p [", + trans->QueryHttpTransaction())); + LogHeaders(result.BeginReading()); + LOG(("]")); + } + + result.AppendLiteral("\r\n"); + return NS_OK; +} + +nsresult nsHttpConnection::StartShortLivedTCPKeepalives() { + if (mUsingSpdyVersion != SpdyVersion::NONE) { + return NS_OK; + } + MOZ_ASSERT(mSocketTransport); + if (!mSocketTransport) { + return NS_ERROR_NOT_INITIALIZED; + } + + nsresult rv = NS_OK; + int32_t idleTimeS = -1; + int32_t retryIntervalS = -1; + if (gHttpHandler->TCPKeepaliveEnabledForShortLivedConns()) { + // Set the idle time. + idleTimeS = gHttpHandler->GetTCPKeepaliveShortLivedIdleTime(); + LOG( + ("nsHttpConnection::StartShortLivedTCPKeepalives[%p] " + "idle time[%ds].", + this, idleTimeS)); + + retryIntervalS = std::max<int32_t>((int32_t)PR_IntervalToSeconds(mRtt), 1); + rv = mSocketTransport->SetKeepaliveVals(idleTimeS, retryIntervalS); + if (NS_FAILED(rv)) { + return rv; + } + rv = mSocketTransport->SetKeepaliveEnabled(true); + mTCPKeepaliveConfig = kTCPKeepaliveShortLivedConfig; + } else { + rv = mSocketTransport->SetKeepaliveEnabled(false); + mTCPKeepaliveConfig = kTCPKeepaliveDisabled; + } + if (NS_FAILED(rv)) { + return rv; + } + + // Start a timer to move to long-lived keepalive config. + if (!mTCPKeepaliveTransitionTimer) { + mTCPKeepaliveTransitionTimer = NS_NewTimer(); + } + + if (mTCPKeepaliveTransitionTimer) { + int32_t time = gHttpHandler->GetTCPKeepaliveShortLivedTime(); + + // Adjust |time| to ensure a full set of keepalive probes can be sent + // at the end of the short-lived phase. + if (gHttpHandler->TCPKeepaliveEnabledForShortLivedConns()) { + if (NS_WARN_IF(!gSocketTransportService)) { + return NS_ERROR_NOT_INITIALIZED; + } + int32_t probeCount = -1; + rv = gSocketTransportService->GetKeepaliveProbeCount(&probeCount); + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + if (NS_WARN_IF(probeCount <= 0)) { + return NS_ERROR_UNEXPECTED; + } + // Add time for final keepalive probes, and 2 seconds for a buffer. + time += ((probeCount)*retryIntervalS) - (time % idleTimeS) + 2; + } + mTCPKeepaliveTransitionTimer->InitWithNamedFuncCallback( + nsHttpConnection::UpdateTCPKeepalive, this, (uint32_t)time * 1000, + nsITimer::TYPE_ONE_SHOT, + "net::nsHttpConnection::StartShortLivedTCPKeepalives"); + } else { + NS_WARNING( + "nsHttpConnection::StartShortLivedTCPKeepalives failed to " + "create timer."); + } + + return NS_OK; +} + +nsresult nsHttpConnection::StartLongLivedTCPKeepalives() { + MOZ_ASSERT(mUsingSpdyVersion == SpdyVersion::NONE, + "Don't use TCP Keepalive with SPDY!"); + if (NS_WARN_IF(mUsingSpdyVersion != SpdyVersion::NONE)) { + return NS_OK; + } + MOZ_ASSERT(mSocketTransport); + if (!mSocketTransport) { + return NS_ERROR_NOT_INITIALIZED; + } + + nsresult rv = NS_OK; + if (gHttpHandler->TCPKeepaliveEnabledForLongLivedConns()) { + // Increase the idle time. + int32_t idleTimeS = gHttpHandler->GetTCPKeepaliveLongLivedIdleTime(); + LOG(("nsHttpConnection::StartLongLivedTCPKeepalives[%p] idle time[%ds]", + this, idleTimeS)); + + int32_t retryIntervalS = + std::max<int32_t>((int32_t)PR_IntervalToSeconds(mRtt), 1); + rv = mSocketTransport->SetKeepaliveVals(idleTimeS, retryIntervalS); + if (NS_FAILED(rv)) { + return rv; + } + + // Ensure keepalive is enabled, if current status is disabled. + if (mTCPKeepaliveConfig == kTCPKeepaliveDisabled) { + rv = mSocketTransport->SetKeepaliveEnabled(true); + if (NS_FAILED(rv)) { + return rv; + } + } + mTCPKeepaliveConfig = kTCPKeepaliveLongLivedConfig; + } else { + rv = mSocketTransport->SetKeepaliveEnabled(false); + mTCPKeepaliveConfig = kTCPKeepaliveDisabled; + } + + if (NS_FAILED(rv)) { + return rv; + } + return NS_OK; +} + +nsresult nsHttpConnection::DisableTCPKeepalives() { + MOZ_ASSERT(mSocketTransport); + if (!mSocketTransport) { + return NS_ERROR_NOT_INITIALIZED; + } + + LOG(("nsHttpConnection::DisableTCPKeepalives [%p]", this)); + if (mTCPKeepaliveConfig != kTCPKeepaliveDisabled) { + nsresult rv = mSocketTransport->SetKeepaliveEnabled(false); + if (NS_FAILED(rv)) { + return rv; + } + mTCPKeepaliveConfig = kTCPKeepaliveDisabled; + } + if (mTCPKeepaliveTransitionTimer) { + mTCPKeepaliveTransitionTimer->Cancel(); + mTCPKeepaliveTransitionTimer = nullptr; + } + return NS_OK; +} + +//----------------------------------------------------------------------------- +// nsHttpConnection::nsISupports +//----------------------------------------------------------------------------- + +NS_IMPL_ADDREF(nsHttpConnection) +NS_IMPL_RELEASE(nsHttpConnection) + +NS_INTERFACE_MAP_BEGIN(nsHttpConnection) + NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference) + NS_INTERFACE_MAP_ENTRY(nsIInputStreamCallback) + NS_INTERFACE_MAP_ENTRY(nsIOutputStreamCallback) + NS_INTERFACE_MAP_ENTRY(nsITransportEventSink) + NS_INTERFACE_MAP_ENTRY(nsIInterfaceRequestor) + NS_INTERFACE_MAP_ENTRY(HttpConnectionBase) + NS_INTERFACE_MAP_ENTRY_CONCRETE(nsHttpConnection) +NS_INTERFACE_MAP_END + +//----------------------------------------------------------------------------- +// nsHttpConnection::nsIInputStreamCallback +//----------------------------------------------------------------------------- + +// called on the socket transport thread +NS_IMETHODIMP +nsHttpConnection::OnInputStreamReady(nsIAsyncInputStream* in) { + MOZ_ASSERT(in == mSocketIn, "unexpected stream"); + MOZ_ASSERT(OnSocketThread(), "not on socket thread"); + + if (mIdleMonitoring) { + MOZ_ASSERT(!mTransaction, "Idle Input Event While Active"); + + // The only read event that is protocol compliant for an idle connection + // is an EOF, which we check for with CanReuse(). If the data is + // something else then just ignore it and suspend checking for EOF - + // our normal timers or protocol stack are the place to deal with + // any exception logic. + + if (!CanReuse()) { + LOG(("Server initiated close of idle conn %p\n", this)); + Unused << gHttpHandler->ConnMgr()->CloseIdleConnection(this); + return NS_OK; + } + + LOG(("Input data on idle conn %p, but not closing yet\n", this)); + return NS_OK; + } + + // if the transaction was dropped... + if (!mTransaction) { + LOG((" no transaction; ignoring event\n")); + return NS_OK; + } + + nsresult rv = OnSocketReadable(); + if (rv == NS_BASE_STREAM_WOULD_BLOCK) { + return rv; + } + + if (NS_FAILED(rv)) { + CloseTransaction(mTransaction, rv); + } + + return NS_OK; +} + +//----------------------------------------------------------------------------- +// nsHttpConnection::nsIOutputStreamCallback +//----------------------------------------------------------------------------- + +NS_IMETHODIMP +nsHttpConnection::OnOutputStreamReady(nsIAsyncOutputStream* out) { + MOZ_ASSERT(OnSocketThread(), "not on socket thread"); + MOZ_ASSERT(out == mSocketOut, "unexpected socket"); + // if the transaction was dropped... + if (!mTransaction) { + LOG((" no transaction; ignoring event\n")); + return NS_OK; + } + + nsresult rv = OnSocketWritable(); + if (rv == NS_BASE_STREAM_WOULD_BLOCK) { + return NS_OK; + } + + if (NS_FAILED(rv)) CloseTransaction(mTransaction, rv); + + return NS_OK; +} + +//----------------------------------------------------------------------------- +// nsHttpConnection::nsITransportEventSink +//----------------------------------------------------------------------------- + +NS_IMETHODIMP +nsHttpConnection::OnTransportStatus(nsITransport* trans, nsresult status, + int64_t progress, int64_t progressMax) { + if (mTransaction) mTransaction->OnTransportStatus(trans, status, progress); + return NS_OK; +} + +//----------------------------------------------------------------------------- +// nsHttpConnection::nsIInterfaceRequestor +//----------------------------------------------------------------------------- + +// not called on the socket transport thread +NS_IMETHODIMP +nsHttpConnection::GetInterface(const nsIID& iid, void** result) { + // NOTE: This function is only called on the UI thread via sync proxy from + // the socket transport thread. If that weren't the case, then we'd + // have to worry about the possibility of mTransaction going away + // part-way through this function call. See CloseTransaction. + + // NOTE - there is a bug here, the call to getinterface is proxied off the + // nss thread, not the ui thread as the above comment says. So there is + // indeed a chance of mTransaction going away. bug 615342 + + MOZ_ASSERT(!OnSocketThread(), "on socket thread"); + + nsCOMPtr<nsIInterfaceRequestor> callbacks; + { + MutexAutoLock lock(mCallbacksLock); + callbacks = mCallbacks; + } + if (callbacks) return callbacks->GetInterface(iid, result); + return NS_ERROR_NO_INTERFACE; +} + +void nsHttpConnection::CheckForTraffic(bool check) { + if (check) { + LOG((" CheckForTraffic conn %p\n", this)); + if (mSpdySession) { + if (PR_IntervalToMilliseconds(IdleTime()) >= 500) { + // Send a ping to verify it is still alive if it has been idle + // more than half a second, the network changed events are + // rate-limited to one per 1000 ms. + LOG((" SendPing\n")); + mSpdySession->SendPing(); + } else { + LOG((" SendPing skipped due to network activity\n")); + } + } else { + // If not SPDY, Store snapshot amount of data right now + mTrafficCount = mTotalBytesWritten + mTotalBytesRead; + mTrafficStamp = true; + } + } else { + // mark it as not checked + mTrafficStamp = false; + } +} + +void nsHttpConnection::SetEvent(nsresult aStatus) { + switch (aStatus) { + case NS_NET_STATUS_RESOLVING_HOST: + mBootstrappedTimings.domainLookupStart = TimeStamp::Now(); + break; + case NS_NET_STATUS_RESOLVED_HOST: + mBootstrappedTimings.domainLookupEnd = TimeStamp::Now(); + break; + case NS_NET_STATUS_CONNECTING_TO: + mBootstrappedTimings.connectStart = TimeStamp::Now(); + break; + case NS_NET_STATUS_CONNECTED_TO: { + TimeStamp tnow = TimeStamp::Now(); + mBootstrappedTimings.tcpConnectEnd = tnow; + mBootstrappedTimings.connectEnd = tnow; + mBootstrappedTimings.secureConnectionStart = tnow; + break; + } + case NS_NET_STATUS_TLS_HANDSHAKE_STARTING: + mBootstrappedTimings.secureConnectionStart = TimeStamp::Now(); + break; + case NS_NET_STATUS_TLS_HANDSHAKE_ENDED: + mBootstrappedTimings.connectEnd = TimeStamp::Now(); + break; + default: + break; + } +} + +bool nsHttpConnection::NoClientCertAuth() const { + if (!mSocketTransport) { + return false; + } + + nsCOMPtr<nsITLSSocketControl> tlsSocketControl; + mSocketTransport->GetTlsSocketControl(getter_AddRefs(tlsSocketControl)); + if (!tlsSocketControl) { + return false; + } + + return !tlsSocketControl->GetClientCertSent(); +} + +WebSocketSupport nsHttpConnection::GetWebSocketSupport() { + LOG3(("nsHttpConnection::GetWebSocketSupport")); + if (!UsingSpdy()) { + return WebSocketSupport::SUPPORTED; + } + LOG3(("nsHttpConnection::GetWebSocketSupport checking spdy session")); + if (mSpdySession) { + return mSpdySession->GetWebSocketSupport(); + } + + return WebSocketSupport::NO_SUPPORT; +} + +bool nsHttpConnection::IsProxyConnectInProgress() { + return mState == SETTING_UP_TUNNEL; +} + +bool nsHttpConnection::LastTransactionExpectedNoContent() { + return mLastTransactionExpectedNoContent; +} + +void nsHttpConnection::SetLastTransactionExpectedNoContent(bool val) { + mLastTransactionExpectedNoContent = val; +} + +bool nsHttpConnection::IsPersistent() { return IsKeepAlive() && !mDontReuse; } + +nsAHttpTransaction* nsHttpConnection::Transaction() { return mTransaction; } + +nsresult nsHttpConnection::GetSelfAddr(NetAddr* addr) { + if (!mSocketTransport) { + return NS_ERROR_FAILURE; + } + return mSocketTransport->GetSelfAddr(addr); +} + +nsresult nsHttpConnection::GetPeerAddr(NetAddr* addr) { + if (!mSocketTransport) { + return NS_ERROR_FAILURE; + } + return mSocketTransport->GetPeerAddr(addr); +} + +bool nsHttpConnection::ResolvedByTRR() { + bool val = false; + if (mSocketTransport) { + mSocketTransport->ResolvedByTRR(&val); + } + return val; +} + +nsIRequest::TRRMode nsHttpConnection::EffectiveTRRMode() { + nsIRequest::TRRMode mode = nsIRequest::TRR_DEFAULT_MODE; + if (mSocketTransport) { + mSocketTransport->GetEffectiveTRRMode(&mode); + } + return mode; +} + +TRRSkippedReason nsHttpConnection::TRRSkipReason() { + TRRSkippedReason reason = nsITRRSkipReason::TRR_UNSET; + if (mSocketTransport) { + mSocketTransport->GetTrrSkipReason(&reason); + } + return reason; +} + +bool nsHttpConnection::GetEchConfigUsed() { + bool val = false; + if (mSocketTransport) { + mSocketTransport->GetEchConfigUsed(&val); + } + return val; +} + +void nsHttpConnection::HandshakeDoneInternal() { + LOG(("nsHttpConnection::HandshakeDoneInternal [this=%p]\n", this)); + if (mTlsHandshaker->NPNComplete()) { + return; + } + + nsCOMPtr<nsITLSSocketControl> tlsSocketControl; + GetTLSSocketControl(getter_AddRefs(tlsSocketControl)); + if (!tlsSocketControl) { + mTlsHandshaker->FinishNPNSetup(false, false); + return; + } + + nsCOMPtr<nsITransportSecurityInfo> securityInfo; + if (NS_FAILED( + tlsSocketControl->GetSecurityInfo(getter_AddRefs(securityInfo)))) { + mTlsHandshaker->FinishNPNSetup(false, false); + return; + } + if (!securityInfo) { + mTlsHandshaker->FinishNPNSetup(false, false); + return; + } + + nsAutoCString negotiatedNPN; + DebugOnly<nsresult> rvDebug = securityInfo->GetNegotiatedNPN(negotiatedNPN); + MOZ_ASSERT(NS_SUCCEEDED(rvDebug)); + + bool earlyDataAccepted = false; + if (mTlsHandshaker->EarlyDataUsed()) { + // Check if early data has been accepted. + nsresult rvEarlyData = + tlsSocketControl->GetEarlyDataAccepted(&earlyDataAccepted); + LOG( + ("nsHttpConnection::HandshakeDone [this=%p] - early data " + "that was sent during 0RTT %s been accepted [rv=%" PRIx32 "].", + this, earlyDataAccepted ? "has" : "has not", + static_cast<uint32_t>(rvEarlyData))); + + if (NS_FAILED(rvEarlyData) || + (mTransaction && + NS_FAILED(mTransaction->Finish0RTT( + !earlyDataAccepted, + negotiatedNPN != mTlsHandshaker->EarlyNegotiatedALPN())))) { + LOG( + ("nsHttpConection::HandshakeDone [this=%p] closing transaction " + "%p", + this, mTransaction.get())); + if (mTransaction) { + mTransaction->Close(NS_ERROR_NET_RESET); + } + mTlsHandshaker->FinishNPNSetup(false, true); + return; + } + if (mDid0RTTSpdy && + (negotiatedNPN != mTlsHandshaker->EarlyNegotiatedALPN())) { + Reset0RttForSpdy(); + } + } + + if (mTlsHandshaker->EarlyDataAvailable() && !earlyDataAccepted) { + // When the early-data were used but not accepted, we need to start + // from the begining here and start writing the request again. + // The same is true if 0RTT was available but not used. + if (mSocketIn) { + mSocketIn->AsyncWait(nullptr, 0, 0, nullptr); + } + Unused << ResumeSend(); + } + + int16_t tlsVersion; + tlsSocketControl->GetSSLVersionUsed(&tlsVersion); + mConnInfo->SetLessThanTls13( + (tlsVersion < nsITLSSocketControl::TLS_VERSION_1_3) && + (tlsVersion != nsITLSSocketControl::SSL_VERSION_UNKNOWN)); + + mTlsHandshaker->EarlyDataTelemetry(tlsVersion, earlyDataAccepted, + mContentBytesWritten0RTT); + mTlsHandshaker->EarlyDataDone(); + + if (!earlyDataAccepted) { + LOG( + ("nsHttpConnection::HandshakeDone [this=%p] early data not " + "accepted or early data were not used", + this)); + + const SpdyInformation* info = gHttpHandler->SpdyInfo(); + if (negotiatedNPN.Equals(info->VersionString)) { + if (mTransaction) { + StartSpdy(tlsSocketControl, info->Version); + } else { + LOG( + ("nsHttpConnection::HandshakeDone [this=%p] set " + "mContinueHandshakeDone", + this)); + RefPtr<nsHttpConnection> self = this; + mContinueHandshakeDone = [self = RefPtr{this}, + tlsSocketControl(tlsSocketControl), + info(info->Version)]() { + LOG(("nsHttpConnection do mContinueHandshakeDone [this=%p]", + self.get())); + self->StartSpdy(tlsSocketControl, info); + self->mTlsHandshaker->FinishNPNSetup(true, true); + }; + return; + } + } + } else { + LOG(("nsHttpConnection::HandshakeDone [this=%p] - %" PRId64 " bytes " + "has been sent during 0RTT.", + this, mContentBytesWritten0RTT)); + mContentBytesWritten = mContentBytesWritten0RTT; + + if (mSpdySession) { + // We had already started 0RTT-spdy, now we need to fully set up + // spdy, since we know we're sticking with it. + LOG( + ("nsHttpConnection::HandshakeDone [this=%p] - finishing " + "StartSpdy for 0rtt spdy session %p", + this, mSpdySession.get())); + StartSpdy(tlsSocketControl, mSpdySession->SpdyVersion()); + } + } + + Telemetry::Accumulate(Telemetry::SPDY_NPN_CONNECT, UsingSpdy()); + + mTlsHandshaker->FinishNPNSetup(true, true); + Unused << ResumeSend(); +} + +void nsHttpConnection::SetTunnelSetupDone() { + MOZ_ASSERT(mProxyConnectStream); + MOZ_ASSERT(mState == HttpConnectionState::SETTING_UP_TUNNEL); + + ChangeState(HttpConnectionState::REQUEST); + mProxyConnectStream = nullptr; +} + +nsresult nsHttpConnection::CheckTunnelIsNeeded() { + switch (mState) { + case HttpConnectionState::UNINITIALIZED: { + // This is is called first time. Check if we need a tunnel. + if (!mTransaction->ConnectionInfo()->UsingConnect()) { + ChangeState(HttpConnectionState::REQUEST); + return NS_OK; + } + ChangeState(HttpConnectionState::SETTING_UP_TUNNEL); + } + [[fallthrough]]; + case HttpConnectionState::SETTING_UP_TUNNEL: { + // When a nsHttpConnection is in this state that means that an + // authentication was needed and we are resending a CONNECT + // request. This request will include authentication headers. + nsresult rv = SetupProxyConnectStream(); + if (NS_FAILED(rv)) { + ChangeState(HttpConnectionState::UNINITIALIZED); + } + return rv; + } + case HttpConnectionState::REQUEST: + return NS_OK; + } + return NS_OK; +} + +nsresult nsHttpConnection::SetupProxyConnectStream() { + LOG(("nsHttpConnection::SetupStream\n")); + NS_ENSURE_TRUE(!mProxyConnectStream, NS_ERROR_ALREADY_INITIALIZED); + MOZ_ASSERT(mState == HttpConnectionState::SETTING_UP_TUNNEL); + + nsAutoCString buf; + nsHttpRequestHead request; + nsresult rv = MakeConnectString(mTransaction, &request, buf, false, + mTransactionCaps & NS_HTTP_USE_RFP); + if (NS_FAILED(rv)) { + return rv; + } + rv = NS_NewCStringInputStream(getter_AddRefs(mProxyConnectStream), + std::move(buf)); + return rv; +} + +nsresult nsHttpConnection::ReadFromStream(nsIInputStream* input, void* closure, + const char* buf, uint32_t offset, + uint32_t count, uint32_t* countRead) { + // thunk for nsIInputStream instance + nsHttpConnection* conn = (nsHttpConnection*)closure; + return conn->OnReadSegment(buf, count, countRead); +} + +nsresult nsHttpConnection::SendConnectRequest(void* closure, + uint32_t* transactionBytes) { + LOG((" writing CONNECT request stream\n")); + return mProxyConnectStream->ReadSegments(ReadFromStream, closure, + nsIOService::gDefaultSegmentSize, + transactionBytes); +} + +} // namespace mozilla::net |