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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
commit36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree105e8c98ddea1c1e4784a60a5a6410fa416be2de /netwerk/protocol/http/nsHttpConnectionMgr.cpp
parentInitial commit. (diff)
downloadfirefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz
firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'netwerk/protocol/http/nsHttpConnectionMgr.cpp')
-rw-r--r--netwerk/protocol/http/nsHttpConnectionMgr.cpp3841
1 files changed, 3841 insertions, 0 deletions
diff --git a/netwerk/protocol/http/nsHttpConnectionMgr.cpp b/netwerk/protocol/http/nsHttpConnectionMgr.cpp
new file mode 100644
index 0000000000..67865e0556
--- /dev/null
+++ b/netwerk/protocol/http/nsHttpConnectionMgr.cpp
@@ -0,0 +1,3841 @@
+/* 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 <algorithm>
+#include <utility>
+
+#include "ConnectionHandle.h"
+#include "HttpConnectionUDP.h"
+#include "NullHttpTransaction.h"
+#include "SpeculativeTransaction.h"
+#include "mozilla/Components.h"
+#include "mozilla/ProfilerMarkers.h"
+#include "mozilla/SpinEventLoopUntil.h"
+#include "mozilla/StaticPrefs_network.h"
+#include "mozilla/Telemetry.h"
+#include "mozilla/Unused.h"
+#include "mozilla/glean/GleanMetrics.h"
+#include "mozilla/net/DNS.h"
+#include "mozilla/net/DashboardTypes.h"
+#include "nsCOMPtr.h"
+#include "nsHttpConnectionMgr.h"
+#include "nsHttpHandler.h"
+#include "nsIClassOfService.h"
+#include "nsIDNSByTypeRecord.h"
+#include "nsIDNSListener.h"
+#include "nsIDNSRecord.h"
+#include "nsIDNSService.h"
+#include "nsIHttpChannelInternal.h"
+#include "nsIPipe.h"
+#include "nsIRequestContext.h"
+#include "nsISocketTransport.h"
+#include "nsISocketTransportService.h"
+#include "nsITransport.h"
+#include "nsIXPConnect.h"
+#include "nsInterfaceRequestorAgg.h"
+#include "nsNetCID.h"
+#include "nsNetSegmentUtils.h"
+#include "nsNetUtil.h"
+#include "nsQueryObject.h"
+#include "nsSocketTransportService2.h"
+#include "nsStreamUtils.h"
+
+using namespace mozilla;
+
+namespace geckoprofiler::markers {
+
+struct UrlMarker {
+ static constexpr Span<const char> MarkerTypeName() {
+ return MakeStringSpan("Url");
+ }
+ static void StreamJSONMarkerData(
+ mozilla::baseprofiler::SpliceableJSONWriter& aWriter,
+ const mozilla::ProfilerString8View& aURL) {
+ if (aURL.Length() != 0) {
+ aWriter.StringProperty("url", aURL);
+ }
+ }
+ static MarkerSchema MarkerTypeDisplay() {
+ using MS = MarkerSchema;
+ MS schema(MS::Location::MarkerChart, MS::Location::MarkerTable);
+ schema.SetTableLabel("{marker.name} - {marker.data.url}");
+ schema.AddKeyFormat("url", MS::Format::Url);
+ return schema;
+ }
+};
+
+} // namespace geckoprofiler::markers
+
+namespace mozilla::net {
+
+//-----------------------------------------------------------------------------
+
+NS_IMPL_ISUPPORTS(nsHttpConnectionMgr, nsIObserver, nsINamed)
+
+//-----------------------------------------------------------------------------
+
+nsHttpConnectionMgr::nsHttpConnectionMgr() {
+ LOG(("Creating nsHttpConnectionMgr @%p\n", this));
+}
+
+nsHttpConnectionMgr::~nsHttpConnectionMgr() {
+ LOG(("Destroying nsHttpConnectionMgr @%p\n", this));
+ MOZ_ASSERT(mCoalescingHash.Count() == 0);
+ if (mTimeoutTick) mTimeoutTick->Cancel();
+}
+
+nsresult nsHttpConnectionMgr::EnsureSocketThreadTarget() {
+ nsCOMPtr<nsIEventTarget> sts;
+ nsCOMPtr<nsIIOService> ioService = components::IO::Service();
+ if (ioService) {
+ nsCOMPtr<nsISocketTransportService> realSTS =
+ components::SocketTransport::Service();
+ sts = do_QueryInterface(realSTS);
+ }
+
+ ReentrantMonitorAutoEnter mon(mReentrantMonitor);
+
+ // do nothing if already initialized or if we've shut down
+ if (mSocketThreadTarget || mIsShuttingDown) return NS_OK;
+
+ mSocketThreadTarget = sts;
+
+ return sts ? NS_OK : NS_ERROR_NOT_AVAILABLE;
+}
+
+nsresult nsHttpConnectionMgr::Init(
+ uint16_t maxUrgentExcessiveConns, uint16_t maxConns,
+ uint16_t maxPersistConnsPerHost, uint16_t maxPersistConnsPerProxy,
+ uint16_t maxRequestDelay, bool throttleEnabled, uint32_t throttleVersion,
+ uint32_t throttleSuspendFor, uint32_t throttleResumeFor,
+ uint32_t throttleReadLimit, uint32_t throttleReadInterval,
+ uint32_t throttleHoldTime, uint32_t throttleMaxTime,
+ bool beConservativeForProxy) {
+ LOG(("nsHttpConnectionMgr::Init\n"));
+
+ {
+ ReentrantMonitorAutoEnter mon(mReentrantMonitor);
+
+ mMaxUrgentExcessiveConns = maxUrgentExcessiveConns;
+ mMaxConns = maxConns;
+ mMaxPersistConnsPerHost = maxPersistConnsPerHost;
+ mMaxPersistConnsPerProxy = maxPersistConnsPerProxy;
+ mMaxRequestDelay = maxRequestDelay;
+
+ mThrottleEnabled = throttleEnabled;
+ mThrottleVersion = throttleVersion;
+ mThrottleSuspendFor = throttleSuspendFor;
+ mThrottleResumeFor = throttleResumeFor;
+ mThrottleReadLimit = throttleReadLimit;
+ mThrottleReadInterval = throttleReadInterval;
+ mThrottleHoldTime = throttleHoldTime;
+ mThrottleMaxTime = TimeDuration::FromMilliseconds(throttleMaxTime);
+
+ mBeConservativeForProxy = beConservativeForProxy;
+
+ mIsShuttingDown = false;
+ }
+
+ return EnsureSocketThreadTarget();
+}
+
+class BoolWrapper : public ARefBase {
+ public:
+ BoolWrapper() = default;
+ NS_INLINE_DECL_THREADSAFE_REFCOUNTING(BoolWrapper, override)
+
+ public: // intentional!
+ bool mBool{false};
+
+ private:
+ virtual ~BoolWrapper() = default;
+};
+
+nsresult nsHttpConnectionMgr::Shutdown() {
+ LOG(("nsHttpConnectionMgr::Shutdown\n"));
+
+ RefPtr<BoolWrapper> shutdownWrapper = new BoolWrapper();
+ {
+ ReentrantMonitorAutoEnter mon(mReentrantMonitor);
+
+ // do nothing if already shutdown
+ if (!mSocketThreadTarget) return NS_OK;
+
+ nsresult rv =
+ PostEvent(&nsHttpConnectionMgr::OnMsgShutdown, 0, shutdownWrapper);
+
+ // release our reference to the STS to prevent further events
+ // from being posted. this is how we indicate that we are
+ // shutting down.
+ mIsShuttingDown = true;
+ mSocketThreadTarget = nullptr;
+
+ if (NS_FAILED(rv)) {
+ NS_WARNING("unable to post SHUTDOWN message");
+ return rv;
+ }
+ }
+
+ // wait for shutdown event to complete
+ SpinEventLoopUntil("nsHttpConnectionMgr::Shutdown"_ns,
+ [&, shutdownWrapper]() { return shutdownWrapper->mBool; });
+
+ return NS_OK;
+}
+
+class ConnEvent : public Runnable {
+ public:
+ ConnEvent(nsHttpConnectionMgr* mgr, nsConnEventHandler handler,
+ int32_t iparam, ARefBase* vparam)
+ : Runnable("net::ConnEvent"),
+ mMgr(mgr),
+ mHandler(handler),
+ mIParam(iparam),
+ mVParam(vparam) {}
+
+ NS_IMETHOD Run() override {
+ (mMgr->*mHandler)(mIParam, mVParam);
+ return NS_OK;
+ }
+
+ private:
+ virtual ~ConnEvent() = default;
+
+ RefPtr<nsHttpConnectionMgr> mMgr;
+ nsConnEventHandler mHandler;
+ int32_t mIParam;
+ RefPtr<ARefBase> mVParam;
+};
+
+nsresult nsHttpConnectionMgr::PostEvent(nsConnEventHandler handler,
+ int32_t iparam, ARefBase* vparam) {
+ Unused << EnsureSocketThreadTarget();
+
+ nsCOMPtr<nsIEventTarget> target;
+ {
+ ReentrantMonitorAutoEnter mon(mReentrantMonitor);
+ target = mSocketThreadTarget;
+ }
+
+ if (!target) {
+ NS_WARNING("cannot post event if not initialized");
+ return NS_ERROR_NOT_INITIALIZED;
+ }
+
+ nsCOMPtr<nsIRunnable> event = new ConnEvent(this, handler, iparam, vparam);
+ return target->Dispatch(event, NS_DISPATCH_NORMAL);
+}
+
+void nsHttpConnectionMgr::PruneDeadConnectionsAfter(uint32_t timeInSeconds) {
+ LOG(("nsHttpConnectionMgr::PruneDeadConnectionsAfter\n"));
+
+ if (!mTimer) mTimer = NS_NewTimer();
+
+ // failure to create a timer is not a fatal error, but idle connections
+ // will not be cleaned up until we try to use them.
+ if (mTimer) {
+ mTimeOfNextWakeUp = timeInSeconds + NowInSeconds();
+ mTimer->Init(this, timeInSeconds * 1000, nsITimer::TYPE_ONE_SHOT);
+ } else {
+ NS_WARNING("failed to create: timer for pruning the dead connections!");
+ }
+}
+
+void nsHttpConnectionMgr::ConditionallyStopPruneDeadConnectionsTimer() {
+ // Leave the timer in place if there are connections that potentially
+ // need management
+ if (mNumIdleConns ||
+ (mNumActiveConns && StaticPrefs::network_http_http2_enabled())) {
+ return;
+ }
+
+ LOG(("nsHttpConnectionMgr::StopPruneDeadConnectionsTimer\n"));
+
+ // Reset mTimeOfNextWakeUp so that we can find a new shortest value.
+ mTimeOfNextWakeUp = UINT64_MAX;
+ if (mTimer) {
+ mTimer->Cancel();
+ mTimer = nullptr;
+ }
+}
+
+void nsHttpConnectionMgr::ConditionallyStopTimeoutTick() {
+ LOG(
+ ("nsHttpConnectionMgr::ConditionallyStopTimeoutTick "
+ "armed=%d active=%d\n",
+ mTimeoutTickArmed, mNumActiveConns));
+
+ if (!mTimeoutTickArmed) return;
+
+ if (mNumActiveConns) return;
+
+ LOG(("nsHttpConnectionMgr::ConditionallyStopTimeoutTick stop==true\n"));
+
+ mTimeoutTick->Cancel();
+ mTimeoutTickArmed = false;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpConnectionMgr::nsINamed
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpConnectionMgr::GetName(nsACString& aName) {
+ aName.AssignLiteral("nsHttpConnectionMgr");
+ return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// nsHttpConnectionMgr::nsIObserver
+//-----------------------------------------------------------------------------
+
+NS_IMETHODIMP
+nsHttpConnectionMgr::Observe(nsISupports* subject, const char* topic,
+ const char16_t* data) {
+ LOG(("nsHttpConnectionMgr::Observe [topic=\"%s\"]\n", topic));
+
+ if (0 == strcmp(topic, NS_TIMER_CALLBACK_TOPIC)) {
+ nsCOMPtr<nsITimer> timer = do_QueryInterface(subject);
+ if (timer == mTimer) {
+ Unused << PruneDeadConnections();
+ } else if (timer == mTimeoutTick) {
+ TimeoutTick();
+ } else if (timer == mTrafficTimer) {
+ Unused << PruneNoTraffic();
+ } else if (timer == mThrottleTicker) {
+ ThrottlerTick();
+ } else if (timer == mDelayedResumeReadTimer) {
+ ResumeBackgroundThrottledTransactions();
+ } else {
+ MOZ_ASSERT(false, "unexpected timer-callback");
+ LOG(("Unexpected timer object\n"));
+ return NS_ERROR_UNEXPECTED;
+ }
+ }
+
+ return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+
+nsresult nsHttpConnectionMgr::AddTransaction(HttpTransactionShell* trans,
+ int32_t priority) {
+ LOG(("nsHttpConnectionMgr::AddTransaction [trans=%p %d]\n", trans, priority));
+ // Make sure a transaction is not in a pending queue.
+ CheckTransInPendingQueue(trans->AsHttpTransaction());
+ return PostEvent(&nsHttpConnectionMgr::OnMsgNewTransaction, priority,
+ trans->AsHttpTransaction());
+}
+
+class NewTransactionData : public ARefBase {
+ public:
+ NewTransactionData(nsHttpTransaction* trans, int32_t priority,
+ nsHttpTransaction* transWithStickyConn)
+ : mTrans(trans),
+ mPriority(priority),
+ mTransWithStickyConn(transWithStickyConn) {}
+
+ NS_INLINE_DECL_THREADSAFE_REFCOUNTING(NewTransactionData, override)
+
+ RefPtr<nsHttpTransaction> mTrans;
+ int32_t mPriority;
+ RefPtr<nsHttpTransaction> mTransWithStickyConn;
+
+ private:
+ virtual ~NewTransactionData() = default;
+};
+
+nsresult nsHttpConnectionMgr::AddTransactionWithStickyConn(
+ HttpTransactionShell* trans, int32_t priority,
+ HttpTransactionShell* transWithStickyConn) {
+ LOG(
+ ("nsHttpConnectionMgr::AddTransactionWithStickyConn "
+ "[trans=%p %d transWithStickyConn=%p]\n",
+ trans, priority, transWithStickyConn));
+ // Make sure a transaction is not in a pending queue.
+ CheckTransInPendingQueue(trans->AsHttpTransaction());
+
+ RefPtr<NewTransactionData> data =
+ new NewTransactionData(trans->AsHttpTransaction(), priority,
+ transWithStickyConn->AsHttpTransaction());
+ return PostEvent(&nsHttpConnectionMgr::OnMsgNewTransactionWithStickyConn, 0,
+ data);
+}
+
+nsresult nsHttpConnectionMgr::RescheduleTransaction(HttpTransactionShell* trans,
+ int32_t priority) {
+ LOG(("nsHttpConnectionMgr::RescheduleTransaction [trans=%p %d]\n", trans,
+ priority));
+ return PostEvent(&nsHttpConnectionMgr::OnMsgReschedTransaction, priority,
+ trans->AsHttpTransaction());
+}
+
+void nsHttpConnectionMgr::UpdateClassOfServiceOnTransaction(
+ HttpTransactionShell* trans, const ClassOfService& classOfService) {
+ LOG(
+ ("nsHttpConnectionMgr::UpdateClassOfServiceOnTransaction [trans=%p "
+ "classOfService flags=%" PRIu32 " inc=%d]\n",
+ trans, static_cast<uint32_t>(classOfService.Flags()),
+ classOfService.Incremental()));
+
+ Unused << EnsureSocketThreadTarget();
+
+ nsCOMPtr<nsIEventTarget> target;
+ {
+ ReentrantMonitorAutoEnter mon(mReentrantMonitor);
+ target = mSocketThreadTarget;
+ }
+
+ if (!target) {
+ NS_WARNING("cannot post event if not initialized");
+ return;
+ }
+
+ RefPtr<nsHttpConnectionMgr> self(this);
+ Unused << target->Dispatch(NS_NewRunnableFunction(
+ "nsHttpConnectionMgr::CallUpdateClassOfServiceOnTransaction",
+ [cos{classOfService}, self{std::move(self)}, trans = RefPtr{trans}]() {
+ self->OnMsgUpdateClassOfServiceOnTransaction(
+ cos, trans->AsHttpTransaction());
+ }));
+}
+
+nsresult nsHttpConnectionMgr::CancelTransaction(HttpTransactionShell* trans,
+ nsresult reason) {
+ LOG(("nsHttpConnectionMgr::CancelTransaction [trans=%p reason=%" PRIx32 "]\n",
+ trans, static_cast<uint32_t>(reason)));
+ return PostEvent(&nsHttpConnectionMgr::OnMsgCancelTransaction,
+ static_cast<int32_t>(reason), trans->AsHttpTransaction());
+}
+
+nsresult nsHttpConnectionMgr::PruneDeadConnections() {
+ return PostEvent(&nsHttpConnectionMgr::OnMsgPruneDeadConnections);
+}
+
+//
+// Called after a timeout. Check for active connections that have had no
+// traffic since they were "marked" and nuke them.
+nsresult nsHttpConnectionMgr::PruneNoTraffic() {
+ LOG(("nsHttpConnectionMgr::PruneNoTraffic\n"));
+ mPruningNoTraffic = true;
+ return PostEvent(&nsHttpConnectionMgr::OnMsgPruneNoTraffic);
+}
+
+nsresult nsHttpConnectionMgr::VerifyTraffic() {
+ LOG(("nsHttpConnectionMgr::VerifyTraffic\n"));
+ return PostEvent(&nsHttpConnectionMgr::OnMsgVerifyTraffic);
+}
+
+nsresult nsHttpConnectionMgr::DoShiftReloadConnectionCleanup() {
+ return PostEvent(&nsHttpConnectionMgr::OnMsgDoShiftReloadConnectionCleanup, 0,
+ nullptr);
+}
+
+nsresult nsHttpConnectionMgr::DoShiftReloadConnectionCleanupWithConnInfo(
+ nsHttpConnectionInfo* aCI) {
+ if (!aCI) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ RefPtr<nsHttpConnectionInfo> ci = aCI->Clone();
+ return PostEvent(&nsHttpConnectionMgr::OnMsgDoShiftReloadConnectionCleanup, 0,
+ ci);
+}
+
+nsresult nsHttpConnectionMgr::DoSingleConnectionCleanup(
+ nsHttpConnectionInfo* aCI) {
+ if (!aCI) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ RefPtr<nsHttpConnectionInfo> ci = aCI->Clone();
+ return PostEvent(&nsHttpConnectionMgr::OnMsgDoSingleConnectionCleanup, 0, ci);
+}
+
+class SpeculativeConnectArgs : public ARefBase {
+ public:
+ SpeculativeConnectArgs() = default;
+ NS_INLINE_DECL_THREADSAFE_REFCOUNTING(SpeculativeConnectArgs, override)
+
+ public: // intentional!
+ RefPtr<SpeculativeTransaction> mTrans;
+
+ bool mFetchHTTPSRR{false};
+
+ private:
+ virtual ~SpeculativeConnectArgs() = default;
+ NS_DECL_OWNINGTHREAD
+};
+
+nsresult nsHttpConnectionMgr::SpeculativeConnect(
+ nsHttpConnectionInfo* ci, nsIInterfaceRequestor* callbacks, uint32_t caps,
+ SpeculativeTransaction* aTransaction, bool aFetchHTTPSRR) {
+ if (!IsNeckoChild() && NS_IsMainThread()) {
+ // HACK: make sure PSM gets initialized on the main thread.
+ net_EnsurePSMInit();
+ }
+
+ LOG(("nsHttpConnectionMgr::SpeculativeConnect [ci=%s]\n",
+ ci->HashKey().get()));
+
+ nsCOMPtr<nsISpeculativeConnectionOverrider> overrider =
+ do_GetInterface(callbacks);
+
+ bool allow1918 = overrider ? overrider->GetAllow1918() : false;
+
+ // Hosts that are Local IP Literals should not be speculatively
+ // connected - Bug 853423.
+ if ((!allow1918) && ci && ci->HostIsLocalIPLiteral()) {
+ LOG(
+ ("nsHttpConnectionMgr::SpeculativeConnect skipping RFC1918 "
+ "address [%s]",
+ ci->Origin()));
+ return NS_OK;
+ }
+
+ nsCString url = ci->EndToEndSSL() ? "https://"_ns : "http://"_ns;
+ url += ci->GetOrigin();
+ PROFILER_MARKER("SpeculativeConnect", NETWORK, {}, UrlMarker, url);
+
+ RefPtr<SpeculativeConnectArgs> args = new SpeculativeConnectArgs();
+
+ // Wrap up the callbacks and the target to ensure they're released on the
+ // target thread properly.
+ nsCOMPtr<nsIInterfaceRequestor> wrappedCallbacks;
+ NS_NewInterfaceRequestorAggregation(callbacks, nullptr,
+ getter_AddRefs(wrappedCallbacks));
+
+ caps |= ci->GetAnonymous() ? NS_HTTP_LOAD_ANONYMOUS : 0;
+ caps |= NS_HTTP_ERROR_SOFTLY;
+ args->mTrans = aTransaction
+ ? aTransaction
+ : new SpeculativeTransaction(ci, wrappedCallbacks, caps);
+ args->mFetchHTTPSRR = aFetchHTTPSRR;
+
+ if (overrider) {
+ args->mTrans->SetParallelSpeculativeConnectLimit(
+ overrider->GetParallelSpeculativeConnectLimit());
+ args->mTrans->SetIgnoreIdle(overrider->GetIgnoreIdle());
+ args->mTrans->SetIsFromPredictor(overrider->GetIsFromPredictor());
+ args->mTrans->SetAllow1918(overrider->GetAllow1918());
+ }
+
+ return PostEvent(&nsHttpConnectionMgr::OnMsgSpeculativeConnect, 0, args);
+}
+
+nsresult nsHttpConnectionMgr::GetSocketThreadTarget(nsIEventTarget** target) {
+ Unused << EnsureSocketThreadTarget();
+
+ ReentrantMonitorAutoEnter mon(mReentrantMonitor);
+ nsCOMPtr<nsIEventTarget> temp(mSocketThreadTarget);
+ temp.forget(target);
+ return NS_OK;
+}
+
+nsresult nsHttpConnectionMgr::ReclaimConnection(HttpConnectionBase* conn) {
+ LOG(("nsHttpConnectionMgr::ReclaimConnection [conn=%p]\n", conn));
+
+ Unused << EnsureSocketThreadTarget();
+
+ nsCOMPtr<nsIEventTarget> target;
+ {
+ ReentrantMonitorAutoEnter mon(mReentrantMonitor);
+ target = mSocketThreadTarget;
+ }
+
+ if (!target) {
+ NS_WARNING("cannot post event if not initialized");
+ return NS_ERROR_NOT_INITIALIZED;
+ }
+
+ RefPtr<HttpConnectionBase> connRef(conn);
+ RefPtr<nsHttpConnectionMgr> self(this);
+ return target->Dispatch(NS_NewRunnableFunction(
+ "nsHttpConnectionMgr::CallReclaimConnection",
+ [conn{std::move(connRef)}, self{std::move(self)}]() {
+ self->OnMsgReclaimConnection(conn);
+ }));
+}
+
+// A structure used to marshall 6 pointers across the various necessary
+// threads to complete an HTTP upgrade.
+class nsCompleteUpgradeData : public ARefBase {
+ public:
+ nsCompleteUpgradeData(nsHttpTransaction* aTrans,
+ nsIHttpUpgradeListener* aListener, bool aJsWrapped)
+ : mTrans(aTrans), mUpgradeListener(aListener), mJsWrapped(aJsWrapped) {}
+
+ NS_INLINE_DECL_THREADSAFE_REFCOUNTING(nsCompleteUpgradeData, override)
+
+ RefPtr<nsHttpTransaction> mTrans;
+ nsCOMPtr<nsIHttpUpgradeListener> mUpgradeListener;
+
+ nsCOMPtr<nsISocketTransport> mSocketTransport;
+ nsCOMPtr<nsIAsyncInputStream> mSocketIn;
+ nsCOMPtr<nsIAsyncOutputStream> mSocketOut;
+
+ bool mJsWrapped;
+
+ private:
+ virtual ~nsCompleteUpgradeData() {
+ NS_ReleaseOnMainThread("nsCompleteUpgradeData.mUpgradeListener",
+ mUpgradeListener.forget());
+ }
+};
+
+nsresult nsHttpConnectionMgr::CompleteUpgrade(
+ HttpTransactionShell* aTrans, nsIHttpUpgradeListener* aUpgradeListener) {
+ // test if aUpgradeListener is a wrapped JsObject
+ nsCOMPtr<nsIXPConnectWrappedJS> wrapper = do_QueryInterface(aUpgradeListener);
+
+ bool wrapped = !!wrapper;
+
+ RefPtr<nsCompleteUpgradeData> data = new nsCompleteUpgradeData(
+ aTrans->AsHttpTransaction(), aUpgradeListener, wrapped);
+ return PostEvent(&nsHttpConnectionMgr::OnMsgCompleteUpgrade, 0, data);
+}
+
+nsresult nsHttpConnectionMgr::UpdateParam(nsParamName name, uint16_t value) {
+ uint32_t param = (uint32_t(name) << 16) | uint32_t(value);
+ return PostEvent(&nsHttpConnectionMgr::OnMsgUpdateParam,
+ static_cast<int32_t>(param), nullptr);
+}
+
+nsresult nsHttpConnectionMgr::ProcessPendingQ(nsHttpConnectionInfo* aCI) {
+ LOG(("nsHttpConnectionMgr::ProcessPendingQ [ci=%s]\n", aCI->HashKey().get()));
+ RefPtr<nsHttpConnectionInfo> ci;
+ if (aCI) {
+ ci = aCI->Clone();
+ }
+ return PostEvent(&nsHttpConnectionMgr::OnMsgProcessPendingQ, 0, ci);
+}
+
+nsresult nsHttpConnectionMgr::ProcessPendingQ() {
+ LOG(("nsHttpConnectionMgr::ProcessPendingQ [All CI]\n"));
+ return PostEvent(&nsHttpConnectionMgr::OnMsgProcessPendingQ, 0, nullptr);
+}
+
+void nsHttpConnectionMgr::OnMsgUpdateRequestTokenBucket(int32_t,
+ ARefBase* param) {
+ EventTokenBucket* tokenBucket = static_cast<EventTokenBucket*>(param);
+ gHttpHandler->SetRequestTokenBucket(tokenBucket);
+}
+
+nsresult nsHttpConnectionMgr::UpdateRequestTokenBucket(
+ EventTokenBucket* aBucket) {
+ // Call From main thread when a new EventTokenBucket has been made in order
+ // to post the new value to the socket thread.
+ return PostEvent(&nsHttpConnectionMgr::OnMsgUpdateRequestTokenBucket, 0,
+ aBucket);
+}
+
+nsresult nsHttpConnectionMgr::ClearConnectionHistory() {
+ return PostEvent(&nsHttpConnectionMgr::OnMsgClearConnectionHistory, 0,
+ nullptr);
+}
+
+void nsHttpConnectionMgr::OnMsgClearConnectionHistory(int32_t,
+ ARefBase* param) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ LOG(("nsHttpConnectionMgr::OnMsgClearConnectionHistory"));
+
+ for (auto iter = mCT.Iter(); !iter.Done(); iter.Next()) {
+ RefPtr<ConnectionEntry> ent = iter.Data();
+ if (ent->IdleConnectionsLength() == 0 && ent->ActiveConnsLength() == 0 &&
+ ent->DnsAndConnectSocketsLength() == 0 &&
+ ent->UrgentStartQueueLength() == 0 && ent->PendingQueueLength() == 0 &&
+ !ent->mDoNotDestroy) {
+ iter.Remove();
+ }
+ }
+}
+
+nsresult nsHttpConnectionMgr::CloseIdleConnection(nsHttpConnection* conn) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ LOG(("nsHttpConnectionMgr::CloseIdleConnection %p conn=%p", this, conn));
+
+ if (!conn->ConnectionInfo()) {
+ return NS_ERROR_UNEXPECTED;
+ }
+
+ ConnectionEntry* ent = mCT.GetWeak(conn->ConnectionInfo()->HashKey());
+
+ if (!ent || NS_FAILED(ent->CloseIdleConnection(conn))) {
+ return NS_ERROR_UNEXPECTED;
+ }
+
+ return NS_OK;
+}
+
+nsresult nsHttpConnectionMgr::RemoveIdleConnection(nsHttpConnection* conn) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ LOG(("nsHttpConnectionMgr::RemoveIdleConnection %p conn=%p", this, conn));
+
+ if (!conn->ConnectionInfo()) {
+ return NS_ERROR_UNEXPECTED;
+ }
+
+ ConnectionEntry* ent = mCT.GetWeak(conn->ConnectionInfo()->HashKey());
+
+ if (!ent || NS_FAILED(ent->RemoveIdleConnection(conn))) {
+ return NS_ERROR_UNEXPECTED;
+ }
+
+ return NS_OK;
+}
+
+HttpConnectionBase* nsHttpConnectionMgr::FindCoalescableConnectionByHashKey(
+ ConnectionEntry* ent, const nsCString& key, bool justKidding, bool aNoHttp2,
+ bool aNoHttp3) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ MOZ_ASSERT(!aNoHttp2 || !aNoHttp3);
+ MOZ_ASSERT(ent->mConnInfo);
+ nsHttpConnectionInfo* ci = ent->mConnInfo;
+
+ nsTArray<nsWeakPtr>* listOfWeakConns = mCoalescingHash.Get(key);
+ if (!listOfWeakConns) {
+ return nullptr;
+ }
+
+ uint32_t listLen = listOfWeakConns->Length();
+ for (uint32_t j = 0; j < listLen;) {
+ RefPtr<HttpConnectionBase> potentialMatch =
+ do_QueryReferent(listOfWeakConns->ElementAt(j));
+ if (!potentialMatch) {
+ // This is a connection that needs to be removed from the list
+ LOG(
+ ("FindCoalescableConnectionByHashKey() found old conn %p that has "
+ "null weak ptr - removing\n",
+ listOfWeakConns->ElementAt(j).get()));
+ if (j != listLen - 1) {
+ listOfWeakConns->Elements()[j] =
+ listOfWeakConns->Elements()[listLen - 1];
+ }
+ listOfWeakConns->RemoveLastElement();
+ MOZ_ASSERT(listOfWeakConns->Length() == listLen - 1);
+ listLen--;
+ continue; // without adjusting iterator
+ }
+
+ if (aNoHttp3 && potentialMatch->UsingHttp3()) {
+ j++;
+ continue;
+ }
+ if (aNoHttp2 && potentialMatch->UsingSpdy()) {
+ j++;
+ continue;
+ }
+ bool couldJoin;
+ if (justKidding) {
+ couldJoin =
+ potentialMatch->TestJoinConnection(ci->GetOrigin(), ci->OriginPort());
+ } else {
+ couldJoin =
+ potentialMatch->JoinConnection(ci->GetOrigin(), ci->OriginPort());
+ }
+ if (couldJoin) {
+ LOG(
+ ("FindCoalescableConnectionByHashKey() found match conn=%p key=%s "
+ "newCI=%s matchedCI=%s join ok\n",
+ potentialMatch.get(), key.get(), ci->HashKey().get(),
+ potentialMatch->ConnectionInfo()->HashKey().get()));
+ return potentialMatch.get();
+ }
+ LOG(
+ ("FindCoalescableConnectionByHashKey() found match conn=%p key=%s "
+ "newCI=%s matchedCI=%s join failed\n",
+ potentialMatch.get(), key.get(), ci->HashKey().get(),
+ potentialMatch->ConnectionInfo()->HashKey().get()));
+
+ ++j; // bypassed by continue when weakptr fails
+ }
+
+ if (!listLen) { // shrunk to 0 while iterating
+ LOG(("FindCoalescableConnectionByHashKey() removing empty list element\n"));
+ mCoalescingHash.Remove(key);
+ }
+ return nullptr;
+}
+
+static void BuildOriginFrameHashKey(nsACString& newKey,
+ nsHttpConnectionInfo* ci,
+ const nsACString& host, int32_t port) {
+ newKey.Assign(host);
+ if (ci->GetAnonymous()) {
+ newKey.AppendLiteral("~A:");
+ } else {
+ newKey.AppendLiteral("~.:");
+ }
+ if (ci->GetFallbackConnection()) {
+ newKey.AppendLiteral("~F:");
+ } else {
+ newKey.AppendLiteral("~.:");
+ }
+ newKey.AppendInt(port);
+ newKey.AppendLiteral("/[");
+ nsAutoCString suffix;
+ ci->GetOriginAttributes().CreateSuffix(suffix);
+ newKey.Append(suffix);
+ newKey.AppendLiteral("]viaORIGIN.FRAME");
+}
+
+HttpConnectionBase* nsHttpConnectionMgr::FindCoalescableConnection(
+ ConnectionEntry* ent, bool justKidding, bool aNoHttp2, bool aNoHttp3) {
+ MOZ_ASSERT(!aNoHttp2 || !aNoHttp3);
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ MOZ_ASSERT(ent->mConnInfo);
+ nsHttpConnectionInfo* ci = ent->mConnInfo;
+ LOG(("FindCoalescableConnection %s\n", ci->HashKey().get()));
+ // First try and look it up by origin frame
+ nsCString newKey;
+ BuildOriginFrameHashKey(newKey, ci, ci->GetOrigin(), ci->OriginPort());
+ HttpConnectionBase* conn = FindCoalescableConnectionByHashKey(
+ ent, newKey, justKidding, aNoHttp2, aNoHttp3);
+ if (conn) {
+ LOG(("FindCoalescableConnection(%s) match conn %p on frame key %s\n",
+ ci->HashKey().get(), conn, newKey.get()));
+ return conn;
+ }
+
+ // now check for DNS based keys
+ // deleted conns (null weak pointers) are removed from list
+ uint32_t keyLen = ent->mCoalescingKeys.Length();
+ for (uint32_t i = 0; i < keyLen; ++i) {
+ conn = FindCoalescableConnectionByHashKey(ent, ent->mCoalescingKeys[i],
+ justKidding, aNoHttp2, aNoHttp3);
+ if (conn) {
+ LOG(("FindCoalescableConnection(%s) match conn %p on dns key %s\n",
+ ci->HashKey().get(), conn, ent->mCoalescingKeys[i].get()));
+ return conn;
+ }
+ }
+
+ LOG(("FindCoalescableConnection(%s) no matching conn\n",
+ ci->HashKey().get()));
+ return nullptr;
+}
+
+void nsHttpConnectionMgr::UpdateCoalescingForNewConn(
+ HttpConnectionBase* newConn, ConnectionEntry* ent, bool aNoHttp3) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ MOZ_ASSERT(newConn);
+ MOZ_ASSERT(newConn->ConnectionInfo());
+ MOZ_ASSERT(ent);
+ MOZ_ASSERT(mCT.GetWeak(newConn->ConnectionInfo()->HashKey()) == ent);
+ LOG(("UpdateCoalescingForNewConn newConn=%p aNoHttp3=%d", newConn, aNoHttp3));
+ HttpConnectionBase* existingConn =
+ FindCoalescableConnection(ent, true, false, false);
+ if (existingConn) {
+ // Prefer http3 connection, but allow an HTTP/2 connection if it is used for
+ // WebSocket.
+ if (newConn->UsingHttp3() && existingConn->UsingSpdy()) {
+ RefPtr<nsHttpConnection> connTCP = do_QueryObject(existingConn);
+ if (connTCP && !connTCP->IsForWebSocket()) {
+ LOG(
+ ("UpdateCoalescingForNewConn() found existing active H2 conn that "
+ "could have served newConn, but new connection is H3, therefore "
+ "close the H2 conncetion"));
+ existingConn->DontReuse();
+ }
+ } else if (existingConn->UsingHttp3() && newConn->UsingSpdy()) {
+ RefPtr<nsHttpConnection> connTCP = do_QueryObject(newConn);
+ if (connTCP && !connTCP->IsForWebSocket() && !aNoHttp3) {
+ LOG(
+ ("UpdateCoalescingForNewConn() found existing active H3 conn that "
+ "could have served H2 newConn graceful close of newConn=%p to "
+ "migrate to existingConn %p\n",
+ newConn, existingConn));
+ newConn->DontReuse();
+ return;
+ }
+ } else {
+ LOG(
+ ("UpdateCoalescingForNewConn() found existing active conn that could "
+ "have served newConn "
+ "graceful close of newConn=%p to migrate to existingConn %p\n",
+ newConn, existingConn));
+ newConn->DontReuse();
+ return;
+ }
+ }
+
+ // This connection might go into the mCoalescingHash for new transactions to
+ // be coalesced onto if it can accept new transactions
+ if (!newConn->CanDirectlyActivate()) {
+ return;
+ }
+
+ uint32_t keyLen = ent->mCoalescingKeys.Length();
+ for (uint32_t i = 0; i < keyLen; ++i) {
+ LOG((
+ "UpdateCoalescingForNewConn() registering newConn %p %s under key %s\n",
+ newConn, newConn->ConnectionInfo()->HashKey().get(),
+ ent->mCoalescingKeys[i].get()));
+
+ mCoalescingHash
+ .LookupOrInsertWith(
+ ent->mCoalescingKeys[i],
+ [] {
+ LOG(("UpdateCoalescingForNewConn() need new list element\n"));
+ return MakeUnique<nsTArray<nsWeakPtr>>(1);
+ })
+ ->AppendElement(do_GetWeakReference(
+ static_cast<nsISupportsWeakReference*>(newConn)));
+ }
+
+ // this is a new connection that can be coalesced onto. hooray!
+ // if there are other connection to this entry (e.g.
+ // some could still be handshaking, shutting down, etc..) then close
+ // them down after any transactions that are on them are complete.
+ // This probably happened due to the parallel connection algorithm
+ // that is used only before the host is known to speak h2.
+ ent->MakeAllDontReuseExcept(newConn);
+}
+
+// This function lets a connection, after completing the NPN phase,
+// report whether or not it is using spdy through the usingSpdy
+// argument. It would not be necessary if NPN were driven out of
+// the connection manager. The connection entry associated with the
+// connection is then updated to indicate whether or not we want to use
+// spdy with that host and update the coalescing hash
+// entries used for de-sharding hostsnames.
+void nsHttpConnectionMgr::ReportSpdyConnection(nsHttpConnection* conn,
+ bool usingSpdy,
+ bool disallowHttp3) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ if (!conn->ConnectionInfo()) {
+ return;
+ }
+ ConnectionEntry* ent = mCT.GetWeak(conn->ConnectionInfo()->HashKey());
+ if (!ent || !usingSpdy) {
+ return;
+ }
+
+ ent->mUsingSpdy = true;
+ mNumSpdyHttp3ActiveConns++;
+
+ // adjust timeout timer
+ uint32_t ttl = conn->TimeToLive();
+ uint64_t timeOfExpire = NowInSeconds() + ttl;
+ if (!mTimer || timeOfExpire < mTimeOfNextWakeUp) {
+ PruneDeadConnectionsAfter(ttl);
+ }
+
+ UpdateCoalescingForNewConn(conn, ent, disallowHttp3);
+
+ nsresult rv = ProcessPendingQ(ent->mConnInfo);
+ if (NS_FAILED(rv)) {
+ LOG(
+ ("ReportSpdyConnection conn=%p ent=%p "
+ "failed to process pending queue (%08x)\n",
+ conn, ent, static_cast<uint32_t>(rv)));
+ }
+ rv = PostEvent(&nsHttpConnectionMgr::OnMsgProcessAllSpdyPendingQ);
+ if (NS_FAILED(rv)) {
+ LOG(
+ ("ReportSpdyConnection conn=%p ent=%p "
+ "failed to post event (%08x)\n",
+ conn, ent, static_cast<uint32_t>(rv)));
+ }
+}
+
+void nsHttpConnectionMgr::ReportHttp3Connection(HttpConnectionBase* conn) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ if (!conn->ConnectionInfo()) {
+ return;
+ }
+ ConnectionEntry* ent = mCT.GetWeak(conn->ConnectionInfo()->HashKey());
+ if (!ent) {
+ return;
+ }
+
+ mNumSpdyHttp3ActiveConns++;
+
+ UpdateCoalescingForNewConn(conn, ent, false);
+ nsresult rv = ProcessPendingQ(ent->mConnInfo);
+ if (NS_FAILED(rv)) {
+ LOG(
+ ("ReportHttp3Connection conn=%p ent=%p "
+ "failed to process pending queue (%08x)\n",
+ conn, ent, static_cast<uint32_t>(rv)));
+ }
+ rv = PostEvent(&nsHttpConnectionMgr::OnMsgProcessAllSpdyPendingQ);
+ if (NS_FAILED(rv)) {
+ LOG(
+ ("ReportHttp3Connection conn=%p ent=%p "
+ "failed to post event (%08x)\n",
+ conn, ent, static_cast<uint32_t>(rv)));
+ }
+}
+
+//-----------------------------------------------------------------------------
+bool nsHttpConnectionMgr::DispatchPendingQ(
+ nsTArray<RefPtr<PendingTransactionInfo>>& pendingQ, ConnectionEntry* ent,
+ bool considerAll) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ PendingTransactionInfo* pendingTransInfo = nullptr;
+ nsresult rv;
+ bool dispatchedSuccessfully = false;
+
+ // if !considerAll iterate the pending list until one is dispatched
+ // successfully. Keep iterating afterwards only until a transaction fails to
+ // dispatch. if considerAll == true then try and dispatch all items.
+ for (uint32_t i = 0; i < pendingQ.Length();) {
+ pendingTransInfo = pendingQ[i];
+
+ bool alreadyDnsAndConnectSocketOrWaitingForTLS =
+ pendingTransInfo->IsAlreadyClaimedInitializingConn();
+
+ rv = TryDispatchTransaction(ent, alreadyDnsAndConnectSocketOrWaitingForTLS,
+ pendingTransInfo);
+ if (NS_SUCCEEDED(rv) || (rv != NS_ERROR_NOT_AVAILABLE)) {
+ if (NS_SUCCEEDED(rv)) {
+ LOG((" dispatching pending transaction...\n"));
+ } else {
+ LOG(
+ (" removing pending transaction based on "
+ "TryDispatchTransaction returning hard error %" PRIx32 "\n",
+ static_cast<uint32_t>(rv)));
+ }
+ if (pendingQ.RemoveElement(pendingTransInfo)) {
+ // pendingTransInfo is now potentially destroyed
+ dispatchedSuccessfully = true;
+ continue; // dont ++i as we just made the array shorter
+ }
+
+ LOG((" transaction not found in pending queue\n"));
+ }
+
+ if (dispatchedSuccessfully && !considerAll) break;
+
+ ++i;
+ }
+ return dispatchedSuccessfully;
+}
+
+uint32_t nsHttpConnectionMgr::MaxPersistConnections(
+ ConnectionEntry* ent) const {
+ if (ent->mConnInfo->UsingHttpProxy() && !ent->mConnInfo->UsingConnect()) {
+ return static_cast<uint32_t>(mMaxPersistConnsPerProxy);
+ }
+
+ return static_cast<uint32_t>(mMaxPersistConnsPerHost);
+}
+
+void nsHttpConnectionMgr::PreparePendingQForDispatching(
+ ConnectionEntry* ent, nsTArray<RefPtr<PendingTransactionInfo>>& pendingQ,
+ bool considerAll) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ pendingQ.Clear();
+
+ uint32_t totalCount = ent->TotalActiveConnections();
+ uint32_t maxPersistConns = MaxPersistConnections(ent);
+ uint32_t availableConnections =
+ maxPersistConns > totalCount ? maxPersistConns - totalCount : 0;
+
+ // No need to try dispatching if we reach the active connection limit.
+ if (!availableConnections) {
+ return;
+ }
+
+ // Only have to get transactions from the queue whose window id is 0.
+ if (!gHttpHandler->ActiveTabPriority()) {
+ ent->AppendPendingQForFocusedWindow(0, pendingQ, availableConnections);
+ return;
+ }
+
+ uint32_t maxFocusedWindowConnections =
+ availableConnections * gHttpHandler->FocusedWindowTransactionRatio();
+ MOZ_ASSERT(maxFocusedWindowConnections < availableConnections);
+
+ if (!maxFocusedWindowConnections) {
+ maxFocusedWindowConnections = 1;
+ }
+
+ // Only need to dispatch transactions for either focused or
+ // non-focused window because considerAll is false.
+ if (!considerAll) {
+ ent->AppendPendingQForFocusedWindow(mCurrentBrowserId, pendingQ,
+ maxFocusedWindowConnections);
+
+ if (pendingQ.IsEmpty()) {
+ ent->AppendPendingQForNonFocusedWindows(mCurrentBrowserId, pendingQ,
+ availableConnections);
+ }
+ return;
+ }
+
+ uint32_t maxNonFocusedWindowConnections =
+ availableConnections - maxFocusedWindowConnections;
+ nsTArray<RefPtr<PendingTransactionInfo>> remainingPendingQ;
+
+ ent->AppendPendingQForFocusedWindow(mCurrentBrowserId, pendingQ,
+ maxFocusedWindowConnections);
+
+ if (maxNonFocusedWindowConnections) {
+ ent->AppendPendingQForNonFocusedWindows(
+ mCurrentBrowserId, remainingPendingQ, maxNonFocusedWindowConnections);
+ }
+
+ // If the slots for either focused or non-focused window are not filled up
+ // to the availability, try to use the remaining available connections
+ // for the other slot (with preference for the focused window).
+ if (remainingPendingQ.Length() < maxNonFocusedWindowConnections) {
+ ent->AppendPendingQForFocusedWindow(
+ mCurrentBrowserId, pendingQ,
+ maxNonFocusedWindowConnections - remainingPendingQ.Length());
+ } else if (pendingQ.Length() < maxFocusedWindowConnections) {
+ ent->AppendPendingQForNonFocusedWindows(
+ mCurrentBrowserId, remainingPendingQ,
+ maxFocusedWindowConnections - pendingQ.Length());
+ }
+
+ MOZ_ASSERT(pendingQ.Length() + remainingPendingQ.Length() <=
+ availableConnections);
+
+ LOG(
+ ("nsHttpConnectionMgr::PreparePendingQForDispatching "
+ "focused window pendingQ.Length()=%zu"
+ ", remainingPendingQ.Length()=%zu\n",
+ pendingQ.Length(), remainingPendingQ.Length()));
+
+ // Append elements in |remainingPendingQ| to |pendingQ|. The order in
+ // |pendingQ| is like: [focusedWindowTrans...nonFocusedWindowTrans].
+ pendingQ.AppendElements(std::move(remainingPendingQ));
+}
+
+bool nsHttpConnectionMgr::ProcessPendingQForEntry(ConnectionEntry* ent,
+ bool considerAll) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ LOG(
+ ("nsHttpConnectionMgr::ProcessPendingQForEntry "
+ "[ci=%s ent=%p active=%zu idle=%zu urgent-start-queue=%zu"
+ " queued=%zu]\n",
+ ent->mConnInfo->HashKey().get(), ent, ent->ActiveConnsLength(),
+ ent->IdleConnectionsLength(), ent->UrgentStartQueueLength(),
+ ent->PendingQueueLength()));
+
+ if (LOG_ENABLED()) {
+ ent->PrintPendingQ();
+ ent->LogConnections();
+ }
+
+ if (!ent->PendingQueueLength() && !ent->UrgentStartQueueLength()) {
+ return false;
+ }
+ ProcessSpdyPendingQ(ent);
+
+ bool dispatchedSuccessfully = false;
+
+ if (ent->UrgentStartQueueLength()) {
+ nsTArray<RefPtr<PendingTransactionInfo>> pendingQ;
+ ent->AppendPendingUrgentStartQ(pendingQ);
+ dispatchedSuccessfully = DispatchPendingQ(pendingQ, ent, considerAll);
+ for (const auto& transactionInfo : Reversed(pendingQ)) {
+ ent->InsertTransaction(transactionInfo);
+ }
+ }
+
+ if (dispatchedSuccessfully && !considerAll) {
+ return dispatchedSuccessfully;
+ }
+
+ nsTArray<RefPtr<PendingTransactionInfo>> pendingQ;
+ PreparePendingQForDispatching(ent, pendingQ, considerAll);
+
+ // The only case that |pendingQ| is empty is when there is no
+ // connection available for dispatching.
+ if (pendingQ.IsEmpty()) {
+ return dispatchedSuccessfully;
+ }
+
+ dispatchedSuccessfully |= DispatchPendingQ(pendingQ, ent, considerAll);
+
+ // Put the leftovers into connection entry, in the same order as they
+ // were before to keep the natural ordering.
+ for (const auto& transactionInfo : Reversed(pendingQ)) {
+ ent->InsertTransaction(transactionInfo, true);
+ }
+
+ // Only remove empty pendingQ when considerAll is true.
+ if (considerAll) {
+ ent->RemoveEmptyPendingQ();
+ }
+
+ return dispatchedSuccessfully;
+}
+
+bool nsHttpConnectionMgr::ProcessPendingQForEntry(nsHttpConnectionInfo* ci) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ ConnectionEntry* ent = mCT.GetWeak(ci->HashKey());
+ if (ent) return ProcessPendingQForEntry(ent, false);
+ return false;
+}
+
+// we're at the active connection limit if any one of the following conditions
+// is true:
+// (1) at max-connections
+// (2) keep-alive enabled and at max-persistent-connections-per-server/proxy
+// (3) keep-alive disabled and at max-connections-per-server
+bool nsHttpConnectionMgr::AtActiveConnectionLimit(ConnectionEntry* ent,
+ uint32_t caps) {
+ nsHttpConnectionInfo* ci = ent->mConnInfo;
+ uint32_t totalCount = ent->TotalActiveConnections();
+
+ if (ci->IsHttp3()) {
+ if (ci->GetWebTransport()) {
+ // TODO: implement this properly in bug 1815735.
+ return false;
+ }
+ return totalCount > 0;
+ }
+
+ uint32_t maxPersistConns = MaxPersistConnections(ent);
+
+ LOG(
+ ("nsHttpConnectionMgr::AtActiveConnectionLimit [ci=%s caps=%x,"
+ "totalCount=%u, maxPersistConns=%u]\n",
+ ci->HashKey().get(), caps, totalCount, maxPersistConns));
+
+ if (caps & NS_HTTP_URGENT_START) {
+ if (totalCount >= (mMaxUrgentExcessiveConns + maxPersistConns)) {
+ LOG((
+ "The number of total connections are greater than or equal to sum of "
+ "max urgent-start queue length and the number of max persistent "
+ "connections.\n"));
+ return true;
+ }
+ return false;
+ }
+
+ // update maxconns if potentially limited by the max socket count
+ // this requires a dynamic reduction in the max socket count to a point
+ // lower than the max-connections pref.
+ uint32_t maxSocketCount = gHttpHandler->MaxSocketCount();
+ if (mMaxConns > maxSocketCount) {
+ mMaxConns = maxSocketCount;
+ LOG(("nsHttpConnectionMgr %p mMaxConns dynamically reduced to %u", this,
+ mMaxConns));
+ }
+
+ // If there are more active connections than the global limit, then we're
+ // done. Purging idle connections won't get us below it.
+ if (mNumActiveConns >= mMaxConns) {
+ LOG((" num active conns == max conns\n"));
+ return true;
+ }
+
+ bool result = (totalCount >= maxPersistConns);
+ LOG(("AtActiveConnectionLimit result: %s", result ? "true" : "false"));
+ return result;
+}
+
+// returns NS_OK if a connection was started
+// return NS_ERROR_NOT_AVAILABLE if a new connection cannot be made due to
+// ephemeral limits
+// returns other NS_ERROR on hard failure conditions
+nsresult nsHttpConnectionMgr::MakeNewConnection(
+ ConnectionEntry* ent, PendingTransactionInfo* pendingTransInfo) {
+ LOG(("nsHttpConnectionMgr::MakeNewConnection %p ent=%p trans=%p", this, ent,
+ pendingTransInfo->Transaction()));
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ if (ent->FindConnToClaim(pendingTransInfo)) {
+ return NS_OK;
+ }
+
+ nsHttpTransaction* trans = pendingTransInfo->Transaction();
+
+ // If this host is trying to negotiate a SPDY session right now,
+ // don't create any new connections until the result of the
+ // negotiation is known.
+ if (!(trans->Caps() & NS_HTTP_DISALLOW_SPDY) &&
+ (trans->Caps() & NS_HTTP_ALLOW_KEEPALIVE) && ent->RestrictConnections()) {
+ LOG(
+ ("nsHttpConnectionMgr::MakeNewConnection [ci = %s] "
+ "Not Available Due to RestrictConnections()\n",
+ ent->mConnInfo->HashKey().get()));
+ return NS_ERROR_NOT_AVAILABLE;
+ }
+
+ // We need to make a new connection. If that is going to exceed the
+ // global connection limit then try and free up some room by closing
+ // an idle connection to another host. We know it won't select "ent"
+ // because we have already determined there are no idle connections
+ // to our destination
+
+ if ((mNumIdleConns + mNumActiveConns + 1 >= mMaxConns) && mNumIdleConns) {
+ // If the global number of connections is preventing the opening of new
+ // connections to a host without idle connections, then close them
+ // regardless of their TTL.
+ auto iter = mCT.ConstIter();
+ while (mNumIdleConns + mNumActiveConns + 1 >= mMaxConns && !iter.Done()) {
+ RefPtr<ConnectionEntry> entry = iter.Data();
+ entry->CloseIdleConnections((mNumIdleConns + mNumActiveConns + 1) -
+ mMaxConns);
+ iter.Next();
+ }
+ }
+
+ if ((mNumIdleConns + mNumActiveConns + 1 >= mMaxConns) && mNumActiveConns &&
+ StaticPrefs::network_http_http2_enabled()) {
+ // If the global number of connections is preventing the opening of new
+ // connections to a host without idle connections, then close any spdy
+ // ASAP.
+ for (const RefPtr<ConnectionEntry>& entry : mCT.Values()) {
+ while (entry->MakeFirstActiveSpdyConnDontReuse()) {
+ // Stop on <= (particularly =) because this dontreuse
+ // causes async close.
+ if (mNumIdleConns + mNumActiveConns + 1 <= mMaxConns) {
+ goto outerLoopEnd;
+ }
+ }
+ }
+ outerLoopEnd:;
+ }
+
+ if (AtActiveConnectionLimit(ent, trans->Caps())) {
+ return NS_ERROR_NOT_AVAILABLE;
+ }
+
+ nsresult rv = ent->CreateDnsAndConnectSocket(
+ trans, trans->Caps(), false, false,
+ trans->GetClassOfService().Flags() & nsIClassOfService::UrgentStart, true,
+ pendingTransInfo);
+ if (NS_FAILED(rv)) {
+ /* hard failure */
+ LOG(
+ ("nsHttpConnectionMgr::MakeNewConnection [ci = %s trans = %p] "
+ "CreateDnsAndConnectSocket() hard failure.\n",
+ ent->mConnInfo->HashKey().get(), trans));
+ trans->Close(rv);
+ if (rv == NS_ERROR_NOT_AVAILABLE) rv = NS_ERROR_FAILURE;
+ return rv;
+ }
+
+ return NS_OK;
+}
+
+// returns OK if a connection is found for the transaction
+// and the transaction is started.
+// returns ERROR_NOT_AVAILABLE if no connection can be found and it
+// should be queued until circumstances change
+// returns other ERROR when transaction has a hard failure and should
+// not remain in the pending queue
+nsresult nsHttpConnectionMgr::TryDispatchTransaction(
+ ConnectionEntry* ent, bool onlyReusedConnection,
+ PendingTransactionInfo* pendingTransInfo) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ nsHttpTransaction* trans = pendingTransInfo->Transaction();
+
+ LOG(
+ ("nsHttpConnectionMgr::TryDispatchTransaction without conn "
+ "[trans=%p ci=%p ci=%s caps=%x onlyreused=%d active=%zu "
+ "idle=%zu]\n",
+ trans, ent->mConnInfo.get(), ent->mConnInfo->HashKey().get(),
+ uint32_t(trans->Caps()), onlyReusedConnection, ent->ActiveConnsLength(),
+ ent->IdleConnectionsLength()));
+
+ uint32_t caps = trans->Caps();
+
+ // 0 - If this should use spdy then dispatch it post haste.
+ // 1 - If there is connection pressure then see if we can pipeline this on
+ // a connection of a matching type instead of using a new conn
+ // 2 - If there is an idle connection, use it!
+ // 3 - if class == reval or script and there is an open conn of that type
+ // then pipeline onto shortest pipeline of that class if limits allow
+ // 4 - If we aren't up against our connection limit,
+ // then open a new one
+ // 5 - Try a pipeline if we haven't already - this will be unusual because
+ // it implies a low connection pressure situation where
+ // MakeNewConnection() failed.. that is possible, but unlikely, due to
+ // global limits
+ // 6 - no connection is available - queue it
+
+ RefPtr<HttpConnectionBase> unusedSpdyPersistentConnection;
+
+ // step 0
+ // look for existing spdy connection - that's always best because it is
+ // essentially pipelining without head of line blocking
+
+ RefPtr<HttpConnectionBase> conn = GetH2orH3ActiveConn(
+ ent,
+ (!StaticPrefs::network_http_http2_enabled() ||
+ (caps & NS_HTTP_DISALLOW_SPDY)),
+ (!nsHttpHandler::IsHttp3Enabled() || (caps & NS_HTTP_DISALLOW_HTTP3)));
+ if (conn) {
+ LOG(("TryingDispatchTransaction: an active h2 connection exists"));
+ WebSocketSupport wsSupp = conn->GetWebSocketSupport();
+ if (trans->IsWebsocketUpgrade()) {
+ LOG(("TryingDispatchTransaction: this is a websocket upgrade"));
+ if (wsSupp == WebSocketSupport::NO_SUPPORT) {
+ LOG((
+ "TryingDispatchTransaction: no support for websockets over Http2"));
+ // This is a websocket transaction and we already have a h2 connection
+ // that do not support websockets, we should disable h2 for this
+ // transaction.
+ trans->DisableSpdy();
+ caps &= NS_HTTP_DISALLOW_SPDY;
+ trans->MakeSticky();
+ } else if (wsSupp == WebSocketSupport::SUPPORTED) {
+ RefPtr<nsHttpConnection> connTCP = do_QueryObject(conn);
+ LOG(("TryingDispatchTransaction: websockets over Http2"));
+
+ // No limit for number of websockets, dispatch transaction to the tunnel
+ RefPtr<nsHttpConnection> connToTunnel;
+ connTCP->CreateTunnelStream(trans, getter_AddRefs(connToTunnel), true);
+ ent->InsertIntoH2WebsocketConns(connToTunnel);
+ trans->SetConnection(nullptr);
+ connToTunnel->SetInSpdyTunnel(); // tells conn it is already in tunnel
+ trans->SetIsHttp2Websocket(true);
+ nsresult rv = DispatchTransaction(ent, trans, connToTunnel);
+ // need to undo NonSticky bypass for transaction reset to continue
+ // for correct websocket upgrade handling
+ trans->MakeSticky();
+ return rv;
+ } else {
+ // if we aren't sure that websockets are supported yet or we are
+ // already at the connection limit then we queue the transaction
+ LOG(("TryingDispatchTransaction: unsure if websockets over Http2"));
+ return NS_ERROR_NOT_AVAILABLE;
+ }
+ } else {
+ if ((caps & NS_HTTP_ALLOW_KEEPALIVE) ||
+ (caps & NS_HTTP_ALLOW_SPDY_WITHOUT_KEEPALIVE) ||
+ !conn->IsExperienced()) {
+ LOG((" dispatch to spdy: [conn=%p]\n", conn.get()));
+ trans->RemoveDispatchedAsBlocking(); /* just in case */
+ nsresult rv = DispatchTransaction(ent, trans, conn);
+ NS_ENSURE_SUCCESS(rv, rv);
+ return NS_OK;
+ }
+ unusedSpdyPersistentConnection = conn;
+ }
+ }
+
+ // If this is not a blocking transaction and the request context for it is
+ // currently processing one or more blocking transactions then we
+ // need to just leave it in the queue until those are complete unless it is
+ // explicitly marked as unblocked.
+ if (!(caps & NS_HTTP_LOAD_AS_BLOCKING)) {
+ if (!(caps & NS_HTTP_LOAD_UNBLOCKED)) {
+ nsIRequestContext* requestContext = trans->RequestContext();
+ if (requestContext) {
+ uint32_t blockers = 0;
+ if (NS_SUCCEEDED(
+ requestContext->GetBlockingTransactionCount(&blockers)) &&
+ blockers) {
+ // need to wait for blockers to clear
+ LOG((" blocked by request context: [rc=%p trans=%p blockers=%d]\n",
+ requestContext, trans, blockers));
+ return NS_ERROR_NOT_AVAILABLE;
+ }
+ }
+ }
+ } else {
+ // Mark the transaction and its load group as blocking right now to prevent
+ // other transactions from being reordered in the queue due to slow syns.
+ trans->DispatchedAsBlocking();
+ }
+
+ // step 1
+ // If connection pressure, then we want to favor pipelining of any kind
+ // h1 pipelining has been removed
+
+ // Subject most transactions at high parallelism to rate pacing.
+ // It will only be actually submitted to the
+ // token bucket once, and if possible it is granted admission synchronously.
+ // It is important to leave a transaction in the pending queue when blocked by
+ // pacing so it can be found on cancel if necessary.
+ // Transactions that cause blocking or bypass it (e.g. js/css) are not rate
+ // limited.
+ if (gHttpHandler->UseRequestTokenBucket()) {
+ // submit even whitelisted transactions to the token bucket though they will
+ // not be slowed by it
+ bool runNow = trans->TryToRunPacedRequest();
+ if (!runNow) {
+ if ((mNumActiveConns - mNumSpdyHttp3ActiveConns) <=
+ gHttpHandler->RequestTokenBucketMinParallelism()) {
+ runNow = true; // white list it
+ } else if (caps & (NS_HTTP_LOAD_AS_BLOCKING | NS_HTTP_LOAD_UNBLOCKED)) {
+ runNow = true; // white list it
+ }
+ }
+ if (!runNow) {
+ LOG((" blocked due to rate pacing trans=%p\n", trans));
+ return NS_ERROR_NOT_AVAILABLE;
+ }
+ }
+
+ // step 2
+ // consider an idle persistent connection
+ bool idleConnsAllUrgent = false;
+ if (caps & NS_HTTP_ALLOW_KEEPALIVE) {
+ nsresult rv = TryDispatchTransactionOnIdleConn(ent, pendingTransInfo, true,
+ &idleConnsAllUrgent);
+ if (NS_SUCCEEDED(rv)) {
+ LOG((" dispatched step 2 (idle) trans=%p\n", trans));
+ return NS_OK;
+ }
+ }
+
+ // step 3
+ // consider pipelining scripts and revalidations
+ // h1 pipelining has been removed
+
+ // Don't dispatch if this transaction is waiting for HTTPS RR.
+ // This usually happens when the pref "network.dns.force_waiting_https_rr" is
+ // true or when echConfig is enabled.
+ if (trans->WaitingForHTTPSRR()) {
+ return NS_ERROR_NOT_AVAILABLE;
+ }
+
+ // step 4
+ if (!onlyReusedConnection) {
+ nsresult rv = MakeNewConnection(ent, pendingTransInfo);
+ if (NS_SUCCEEDED(rv)) {
+ // this function returns NOT_AVAILABLE for asynchronous connects
+ LOG((" dispatched step 4 (async new conn) trans=%p\n", trans));
+ return NS_ERROR_NOT_AVAILABLE;
+ }
+
+ if (rv != NS_ERROR_NOT_AVAILABLE) {
+ // not available return codes should try next step as they are
+ // not hard errors. Other codes should stop now
+ LOG((" failed step 4 (%" PRIx32 ") trans=%p\n",
+ static_cast<uint32_t>(rv), trans));
+ return rv;
+ }
+
+ // repeat step 2 when there are only idle connections and all are urgent,
+ // don't respect urgency so that non-urgent transaction will be allowed
+ // to dispatch on an urgent-start-only marked connection to avoid
+ // dispatch deadlocks
+ if (!(trans->GetClassOfService().Flags() &
+ nsIClassOfService::UrgentStart) &&
+ idleConnsAllUrgent &&
+ ent->ActiveConnsLength() < MaxPersistConnections(ent)) {
+ rv = TryDispatchTransactionOnIdleConn(ent, pendingTransInfo, false);
+ if (NS_SUCCEEDED(rv)) {
+ LOG((" dispatched step 2a (idle, reuse urgent) trans=%p\n", trans));
+ return NS_OK;
+ }
+ }
+ }
+
+ // step 5
+ // previously pipelined anything here if allowed but h1 pipelining has been
+ // removed
+
+ // step 6
+ if (unusedSpdyPersistentConnection) {
+ // to avoid deadlocks, we need to throw away this perfectly valid SPDY
+ // connection to make room for a new one that can service a no KEEPALIVE
+ // request
+ unusedSpdyPersistentConnection->DontReuse();
+ }
+
+ LOG((" not dispatched (queued) trans=%p\n", trans));
+ return NS_ERROR_NOT_AVAILABLE; /* queue it */
+}
+
+nsresult nsHttpConnectionMgr::TryDispatchTransactionOnIdleConn(
+ ConnectionEntry* ent, PendingTransactionInfo* pendingTransInfo,
+ bool respectUrgency, bool* allUrgent) {
+ bool onlyUrgent = !!ent->IdleConnectionsLength();
+
+ nsHttpTransaction* trans = pendingTransInfo->Transaction();
+ bool urgentTrans =
+ trans->GetClassOfService().Flags() & nsIClassOfService::UrgentStart;
+
+ LOG(
+ ("nsHttpConnectionMgr::TryDispatchTransactionOnIdleConn, ent=%p, "
+ "trans=%p, urgent=%d",
+ ent, trans, urgentTrans));
+
+ RefPtr<nsHttpConnection> conn =
+ ent->GetIdleConnection(respectUrgency, urgentTrans, &onlyUrgent);
+
+ if (allUrgent) {
+ *allUrgent = onlyUrgent;
+ }
+
+ if (conn) {
+ // This will update the class of the connection to be the class of
+ // the transaction dispatched on it.
+ ent->InsertIntoActiveConns(conn);
+ nsresult rv = DispatchTransaction(ent, trans, conn);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ return NS_OK;
+ }
+
+ return NS_ERROR_NOT_AVAILABLE;
+}
+
+nsresult nsHttpConnectionMgr::DispatchTransaction(ConnectionEntry* ent,
+ nsHttpTransaction* trans,
+ HttpConnectionBase* conn) {
+ uint32_t caps = trans->Caps();
+ int32_t priority = trans->Priority();
+ nsresult rv;
+
+ LOG(
+ ("nsHttpConnectionMgr::DispatchTransaction "
+ "[ent-ci=%s %p trans=%p caps=%x conn=%p priority=%d isHttp2=%d "
+ "isHttp3=%d]\n",
+ ent->mConnInfo->HashKey().get(), ent, trans, caps, conn, priority,
+ conn->UsingSpdy(), conn->UsingHttp3()));
+
+ // It is possible for a rate-paced transaction to be dispatched independent
+ // of the token bucket when the amount of parallelization has changed or
+ // when a muxed connection (e.g. h2) becomes available.
+ trans->CancelPacing(NS_OK);
+
+ auto recordPendingTimeForHTTPSRR = [&](nsCString& aKey) {
+ uint32_t stage = trans->HTTPSSVCReceivedStage();
+ if (HTTPS_RR_IS_USED(stage)) {
+ aKey.Append("_with_https_rr");
+ } else {
+ aKey.Append("_no_https_rr");
+ }
+
+ AccumulateTimeDelta(Telemetry::TRANSACTION_WAIT_TIME_HTTPS_RR, aKey,
+ trans->GetPendingTime(), TimeStamp::Now());
+ };
+
+ nsAutoCString httpVersionkey("h1"_ns);
+ if (conn->UsingSpdy() || conn->UsingHttp3()) {
+ LOG(
+ ("Spdy Dispatch Transaction via Activate(). Transaction host = %s, "
+ "Connection host = %s\n",
+ trans->ConnectionInfo()->Origin(), conn->ConnectionInfo()->Origin()));
+ rv = conn->Activate(trans, caps, priority);
+ if (NS_SUCCEEDED(rv) && !trans->GetPendingTime().IsNull()) {
+ if (conn->UsingSpdy()) {
+ httpVersionkey = "h2"_ns;
+ AccumulateTimeDelta(Telemetry::TRANSACTION_WAIT_TIME_SPDY,
+ trans->GetPendingTime(), TimeStamp::Now());
+ } else {
+ httpVersionkey = "h3"_ns;
+ AccumulateTimeDelta(Telemetry::TRANSACTION_WAIT_TIME_HTTP3,
+ trans->GetPendingTime(), TimeStamp::Now());
+ }
+ recordPendingTimeForHTTPSRR(httpVersionkey);
+ trans->SetPendingTime(false);
+ }
+ return rv;
+ }
+
+ MOZ_ASSERT(conn && !conn->Transaction(),
+ "DispatchTranaction() on non spdy active connection");
+
+ rv = DispatchAbstractTransaction(ent, trans, caps, conn, priority);
+
+ if (NS_SUCCEEDED(rv) && !trans->GetPendingTime().IsNull()) {
+ AccumulateTimeDelta(Telemetry::TRANSACTION_WAIT_TIME_HTTP,
+ trans->GetPendingTime(), TimeStamp::Now());
+ recordPendingTimeForHTTPSRR(httpVersionkey);
+ trans->SetPendingTime(false);
+ }
+ return rv;
+}
+
+// Use this method for dispatching nsAHttpTransction's. It can only safely be
+// used upon first use of a connection when NPN has not negotiated SPDY vs
+// HTTP/1 yet as multiplexing onto an existing SPDY session requires a
+// concrete nsHttpTransaction
+nsresult nsHttpConnectionMgr::DispatchAbstractTransaction(
+ ConnectionEntry* ent, nsAHttpTransaction* aTrans, uint32_t caps,
+ HttpConnectionBase* conn, int32_t priority) {
+ MOZ_ASSERT(ent);
+
+ nsresult rv;
+ MOZ_ASSERT(!conn->UsingSpdy(),
+ "Spdy Must Not Use DispatchAbstractTransaction");
+ LOG(
+ ("nsHttpConnectionMgr::DispatchAbstractTransaction "
+ "[ci=%s trans=%p caps=%x conn=%p]\n",
+ ent->mConnInfo->HashKey().get(), aTrans, caps, conn));
+
+ RefPtr<nsAHttpTransaction> transaction(aTrans);
+ RefPtr<ConnectionHandle> handle = new ConnectionHandle(conn);
+
+ // give the transaction the indirect reference to the connection.
+ transaction->SetConnection(handle);
+
+ rv = conn->Activate(transaction, caps, priority);
+ if (NS_FAILED(rv)) {
+ LOG((" conn->Activate failed [rv=%" PRIx32 "]\n",
+ static_cast<uint32_t>(rv)));
+ DebugOnly<nsresult> rv_remove = ent->RemoveActiveConnection(conn);
+ MOZ_ASSERT(NS_SUCCEEDED(rv_remove));
+
+ // sever back references to connection, and do so without triggering
+ // a call to ReclaimConnection ;-)
+ transaction->SetConnection(nullptr);
+ handle->Reset(); // destroy the connection
+ }
+
+ return rv;
+}
+
+void nsHttpConnectionMgr::ReportProxyTelemetry(ConnectionEntry* ent) {
+ enum { PROXY_NONE = 1, PROXY_HTTP = 2, PROXY_SOCKS = 3, PROXY_HTTPS = 4 };
+
+ if (!ent->mConnInfo->UsingProxy()) {
+ Telemetry::Accumulate(Telemetry::HTTP_PROXY_TYPE, PROXY_NONE);
+ } else if (ent->mConnInfo->UsingHttpsProxy()) {
+ Telemetry::Accumulate(Telemetry::HTTP_PROXY_TYPE, PROXY_HTTPS);
+ } else if (ent->mConnInfo->UsingHttpProxy()) {
+ Telemetry::Accumulate(Telemetry::HTTP_PROXY_TYPE, PROXY_HTTP);
+ } else {
+ Telemetry::Accumulate(Telemetry::HTTP_PROXY_TYPE, PROXY_SOCKS);
+ }
+}
+
+nsresult nsHttpConnectionMgr::ProcessNewTransaction(nsHttpTransaction* trans) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ // since "adds" and "cancels" are processed asynchronously and because
+ // various events might trigger an "add" directly on the socket thread,
+ // we must take care to avoid dispatching a transaction that has already
+ // been canceled (see bug 190001).
+ if (NS_FAILED(trans->Status())) {
+ LOG((" transaction was canceled... dropping event!\n"));
+ return NS_OK;
+ }
+
+ // Make sure a transaction is not in a pending queue.
+ CheckTransInPendingQueue(trans);
+
+ trans->SetPendingTime();
+
+ RefPtr<Http2PushedStreamWrapper> pushedStreamWrapper =
+ trans->GetPushedStream();
+ if (pushedStreamWrapper) {
+ Http2PushedStream* pushedStream = pushedStreamWrapper->GetStream();
+ if (pushedStream) {
+ RefPtr<Http2Session> session = pushedStream->Session();
+ LOG((" ProcessNewTransaction %p tied to h2 session push %p\n", trans,
+ session.get()));
+ return session->AddStream(trans, trans->Priority(), nullptr)
+ ? NS_OK
+ : NS_ERROR_UNEXPECTED;
+ }
+ }
+
+ nsresult rv = NS_OK;
+ nsHttpConnectionInfo* ci = trans->ConnectionInfo();
+ MOZ_ASSERT(ci);
+ MOZ_ASSERT(!ci->IsHttp3() || !(trans->Caps() & NS_HTTP_DISALLOW_HTTP3));
+
+ bool isWildcard = false;
+ ConnectionEntry* ent = GetOrCreateConnectionEntry(
+ ci, trans->Caps() & NS_HTTP_DISALLOW_HTTP2_PROXY,
+ trans->Caps() & NS_HTTP_DISALLOW_SPDY,
+ trans->Caps() & NS_HTTP_DISALLOW_HTTP3, &isWildcard);
+ MOZ_ASSERT(ent);
+
+ if (gHttpHandler->EchConfigEnabled(ci->IsHttp3())) {
+ ent->MaybeUpdateEchConfig(ci);
+ }
+
+ ReportProxyTelemetry(ent);
+
+ // Check if the transaction already has a sticky reference to a connection.
+ // If so, then we can just use it directly by transferring its reference
+ // to the new connection variable instead of searching for a new one
+
+ nsAHttpConnection* wrappedConnection = trans->Connection();
+ RefPtr<HttpConnectionBase> conn;
+ RefPtr<PendingTransactionInfo> pendingTransInfo;
+ if (wrappedConnection) conn = wrappedConnection->TakeHttpConnection();
+
+ if (conn) {
+ MOZ_ASSERT(trans->Caps() & NS_HTTP_STICKY_CONNECTION);
+ LOG(
+ ("nsHttpConnectionMgr::ProcessNewTransaction trans=%p "
+ "sticky connection=%p\n",
+ trans, conn.get()));
+
+ if (!ent->IsInActiveConns(conn)) {
+ LOG(
+ ("nsHttpConnectionMgr::ProcessNewTransaction trans=%p "
+ "sticky connection=%p needs to go on the active list\n",
+ trans, conn.get()));
+
+ // make sure it isn't on the idle list - we expect this to be an
+ // unknown fresh connection
+ MOZ_ASSERT(!ent->IsInIdleConnections(conn));
+ MOZ_ASSERT(!conn->IsExperienced());
+
+ ent->InsertIntoActiveConns(conn); // make it active
+ }
+
+ trans->SetConnection(nullptr);
+ rv = DispatchTransaction(ent, trans, conn);
+ } else if (isWildcard) {
+ // We have a HTTP/2 session to the proxy, create a new tunneled
+ // connection.
+ RefPtr<HttpConnectionBase> conn = GetH2orH3ActiveConn(ent, false, true);
+ RefPtr<nsHttpConnection> connTCP = do_QueryObject(conn);
+ if (ci->UsingHttpsProxy() && ci->UsingConnect()) {
+ LOG(("About to create new tunnel conn from [%p]", connTCP.get()));
+ ConnectionEntry* specificEnt = mCT.GetWeak(ci->HashKey());
+
+ if (!specificEnt) {
+ RefPtr<nsHttpConnectionInfo> clone(ci->Clone());
+ specificEnt = new ConnectionEntry(clone);
+ mCT.InsertOrUpdate(clone->HashKey(), RefPtr{specificEnt});
+ }
+
+ ent = specificEnt;
+ bool atLimit = AtActiveConnectionLimit(ent, trans->Caps());
+ if (atLimit) {
+ rv = NS_ERROR_NOT_AVAILABLE;
+ } else {
+ RefPtr<nsHttpConnection> newTunnel;
+ connTCP->CreateTunnelStream(trans, getter_AddRefs(newTunnel));
+
+ ent->InsertIntoActiveConns(newTunnel);
+ trans->SetConnection(nullptr);
+ newTunnel->SetInSpdyTunnel();
+ rv = DispatchTransaction(ent, trans, newTunnel);
+ // need to undo the bypass for transaction reset for proxy
+ trans->MakeNonRestartable();
+ }
+ } else {
+ rv = DispatchTransaction(ent, trans, connTCP);
+ }
+ } else {
+ if (!ent->AllowHttp2()) {
+ trans->DisableSpdy();
+ }
+ pendingTransInfo = new PendingTransactionInfo(trans);
+ rv = TryDispatchTransaction(ent, false, pendingTransInfo);
+ }
+
+ if (NS_SUCCEEDED(rv)) {
+ LOG((" ProcessNewTransaction Dispatch Immediately trans=%p\n", trans));
+ return rv;
+ }
+
+ if (rv == NS_ERROR_NOT_AVAILABLE) {
+ if (!pendingTransInfo) {
+ pendingTransInfo = new PendingTransactionInfo(trans);
+ }
+
+ ent->InsertTransaction(pendingTransInfo);
+ return NS_OK;
+ }
+
+ LOG((" ProcessNewTransaction Hard Error trans=%p rv=%" PRIx32 "\n", trans,
+ static_cast<uint32_t>(rv)));
+ return rv;
+}
+
+void nsHttpConnectionMgr::IncrementActiveConnCount() {
+ mNumActiveConns++;
+ ActivateTimeoutTick();
+}
+
+void nsHttpConnectionMgr::DecrementActiveConnCount(HttpConnectionBase* conn) {
+ MOZ_DIAGNOSTIC_ASSERT(mNumActiveConns > 0);
+ if (mNumActiveConns > 0) {
+ mNumActiveConns--;
+ }
+
+ RefPtr<nsHttpConnection> connTCP = do_QueryObject(conn);
+ if (!connTCP || connTCP->EverUsedSpdy()) mNumSpdyHttp3ActiveConns--;
+ ConditionallyStopTimeoutTick();
+}
+
+void nsHttpConnectionMgr::StartedConnect() {
+ mNumActiveConns++;
+ ActivateTimeoutTick(); // likely disabled by RecvdConnect()
+}
+
+void nsHttpConnectionMgr::RecvdConnect() {
+ MOZ_DIAGNOSTIC_ASSERT(mNumActiveConns > 0);
+ if (mNumActiveConns > 0) {
+ mNumActiveConns--;
+ }
+
+ ConditionallyStopTimeoutTick();
+}
+
+void nsHttpConnectionMgr::DispatchSpdyPendingQ(
+ nsTArray<RefPtr<PendingTransactionInfo>>& pendingQ, ConnectionEntry* ent,
+ HttpConnectionBase* connH2, HttpConnectionBase* connH3) {
+ if (pendingQ.Length() == 0) {
+ return;
+ }
+
+ nsTArray<RefPtr<PendingTransactionInfo>> leftovers;
+ uint32_t index;
+ // Dispatch all the transactions we can
+ for (index = 0; index < pendingQ.Length() &&
+ ((connH3 && connH3->CanDirectlyActivate()) ||
+ (connH2 && connH2->CanDirectlyActivate()));
+ ++index) {
+ PendingTransactionInfo* pendingTransInfo = pendingQ[index];
+
+ // We can not dispatch NS_HTTP_ALLOW_KEEPALIVE transactions.
+ if (!(pendingTransInfo->Transaction()->Caps() & NS_HTTP_ALLOW_KEEPALIVE)) {
+ leftovers.AppendElement(pendingTransInfo);
+ continue;
+ }
+
+ // Try dispatching on HTTP3 first
+ HttpConnectionBase* conn = nullptr;
+ if (!(pendingTransInfo->Transaction()->Caps() & NS_HTTP_DISALLOW_HTTP3) &&
+ connH3 && connH3->CanDirectlyActivate()) {
+ conn = connH3;
+ } else if (!(pendingTransInfo->Transaction()->Caps() &
+ NS_HTTP_DISALLOW_SPDY) &&
+ connH2 && connH2->CanDirectlyActivate()) {
+ conn = connH2;
+ } else {
+ leftovers.AppendElement(pendingTransInfo);
+ continue;
+ }
+
+ nsresult rv =
+ DispatchTransaction(ent, pendingTransInfo->Transaction(), conn);
+ if (NS_FAILED(rv)) {
+ // this cannot happen, but if due to some bug it does then
+ // close the transaction
+ MOZ_ASSERT(false, "Dispatch SPDY Transaction");
+ LOG(("ProcessSpdyPendingQ Dispatch Transaction failed trans=%p\n",
+ pendingTransInfo->Transaction()));
+ pendingTransInfo->Transaction()->Close(rv);
+ }
+ }
+
+ // Slurp up the rest of the pending queue into our leftovers bucket (we
+ // might have some left if conn->CanDirectlyActivate returned false)
+ for (; index < pendingQ.Length(); ++index) {
+ PendingTransactionInfo* pendingTransInfo = pendingQ[index];
+ leftovers.AppendElement(pendingTransInfo);
+ }
+
+ // Put the leftovers back in the pending queue and get rid of the
+ // transactions we dispatched
+ pendingQ = std::move(leftovers);
+}
+
+// This function tries to dispatch the pending h2 or h3 transactions on
+// the connection entry sent in as an argument. It will do so on the
+// active h2 or h3 connection either in that same entry or from the
+// coalescing hash table
+void nsHttpConnectionMgr::ProcessSpdyPendingQ(ConnectionEntry* ent) {
+ // Look for one HTTP2 and one HTTP3 connection.
+ // We may have transactions that have NS_HTTP_DISALLOW_SPDY/HTTP3 set
+ // and we may need an alternative.
+ HttpConnectionBase* connH3 = GetH2orH3ActiveConn(ent, true, false);
+ HttpConnectionBase* connH2 = GetH2orH3ActiveConn(ent, false, true);
+ if ((!connH3 || !connH3->CanDirectlyActivate()) &&
+ (!connH2 || !connH2->CanDirectlyActivate())) {
+ return;
+ }
+
+ nsTArray<RefPtr<PendingTransactionInfo>> urgentQ;
+ ent->AppendPendingUrgentStartQ(urgentQ);
+ DispatchSpdyPendingQ(urgentQ, ent, connH2, connH3);
+ for (const auto& transactionInfo : Reversed(urgentQ)) {
+ ent->InsertTransaction(transactionInfo);
+ }
+
+ if ((!connH3 || !connH3->CanDirectlyActivate()) &&
+ (!connH2 || !connH2->CanDirectlyActivate())) {
+ return;
+ }
+
+ nsTArray<RefPtr<PendingTransactionInfo>> pendingQ;
+ // XXX Get all transactions for SPDY currently.
+ ent->AppendPendingQForNonFocusedWindows(0, pendingQ);
+ DispatchSpdyPendingQ(pendingQ, ent, connH2, connH3);
+
+ // Put the leftovers back in the pending queue.
+ for (const auto& transactionInfo : pendingQ) {
+ ent->InsertTransaction(transactionInfo);
+ }
+}
+
+void nsHttpConnectionMgr::OnMsgProcessAllSpdyPendingQ(int32_t, ARefBase*) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ LOG(("nsHttpConnectionMgr::OnMsgProcessAllSpdyPendingQ\n"));
+ for (const auto& entry : mCT.Values()) {
+ ProcessSpdyPendingQ(entry.get());
+ }
+}
+
+// Given a connection entry, return an active h2 or h3 connection
+// that can be directly activated or null.
+HttpConnectionBase* nsHttpConnectionMgr::GetH2orH3ActiveConn(
+ ConnectionEntry* ent, bool aNoHttp2, bool aNoHttp3) {
+ if (aNoHttp2 && aNoHttp3) {
+ return nullptr;
+ }
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ MOZ_ASSERT(ent);
+
+ // First look at ent. If protocol that ent provides is no forbidden,
+ // i.e. ent use HTTP3 and !aNoHttp3 or en uses HTTP over TCP and !aNoHttp2.
+ if ((!aNoHttp3 && ent->IsHttp3()) || (!aNoHttp2 && !ent->IsHttp3())) {
+ HttpConnectionBase* conn = ent->GetH2orH3ActiveConn();
+ if (conn) {
+ return conn;
+ }
+ }
+
+ nsHttpConnectionInfo* ci = ent->mConnInfo;
+
+ // there was no active HTTP2/3 connection in the connection entry, but
+ // there might be one in the hash table for coalescing
+ HttpConnectionBase* existingConn =
+ FindCoalescableConnection(ent, false, aNoHttp2, aNoHttp3);
+ if (existingConn) {
+ LOG(
+ ("GetH2orH3ActiveConn() request for ent %p %s "
+ "found an active connection %p in the coalescing hashtable\n",
+ ent, ci->HashKey().get(), existingConn));
+ return existingConn;
+ }
+
+ LOG(
+ ("GetH2orH3ActiveConn() request for ent %p %s "
+ "did not find an active connection\n",
+ ent, ci->HashKey().get()));
+ return nullptr;
+}
+
+//-----------------------------------------------------------------------------
+
+void nsHttpConnectionMgr::AbortAndCloseAllConnections(int32_t, ARefBase*) {
+ if (!OnSocketThread()) {
+ Unused << PostEvent(&nsHttpConnectionMgr::AbortAndCloseAllConnections);
+ return;
+ }
+
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ LOG(("nsHttpConnectionMgr::AbortAndCloseAllConnections\n"));
+ for (auto iter = mCT.Iter(); !iter.Done(); iter.Next()) {
+ RefPtr<ConnectionEntry> ent = iter.Data();
+
+ // Close all active connections.
+ ent->CloseActiveConnections();
+
+ // Close all idle connections.
+ ent->CloseIdleConnections();
+
+ // Close websocket "fake" connections
+ ent->CloseH2WebsocketConnections();
+
+ // Close all pending transactions.
+ ent->CancelAllTransactions(NS_ERROR_ABORT);
+
+ // Close all half open tcp connections.
+ ent->CloseAllDnsAndConnectSockets();
+
+ MOZ_ASSERT(!ent->mDoNotDestroy);
+ iter.Remove();
+ }
+
+ mActiveTransactions[false].Clear();
+ mActiveTransactions[true].Clear();
+}
+
+void nsHttpConnectionMgr::OnMsgShutdown(int32_t, ARefBase* param) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ LOG(("nsHttpConnectionMgr::OnMsgShutdown\n"));
+
+ gHttpHandler->StopRequestTokenBucket();
+ AbortAndCloseAllConnections(0, nullptr);
+
+ // If all idle connections are removed we can stop pruning dead
+ // connections.
+ ConditionallyStopPruneDeadConnectionsTimer();
+
+ if (mTimeoutTick) {
+ mTimeoutTick->Cancel();
+ mTimeoutTick = nullptr;
+ mTimeoutTickArmed = false;
+ }
+ if (mTimer) {
+ mTimer->Cancel();
+ mTimer = nullptr;
+ }
+ if (mTrafficTimer) {
+ mTrafficTimer->Cancel();
+ mTrafficTimer = nullptr;
+ }
+ DestroyThrottleTicker();
+
+ mCoalescingHash.Clear();
+
+ // signal shutdown complete
+ nsCOMPtr<nsIRunnable> runnable =
+ new ConnEvent(this, &nsHttpConnectionMgr::OnMsgShutdownConfirm, 0, param);
+ NS_DispatchToMainThread(runnable);
+}
+
+void nsHttpConnectionMgr::OnMsgShutdownConfirm(int32_t priority,
+ ARefBase* param) {
+ MOZ_ASSERT(NS_IsMainThread());
+ LOG(("nsHttpConnectionMgr::OnMsgShutdownConfirm\n"));
+
+ BoolWrapper* shutdown = static_cast<BoolWrapper*>(param);
+ shutdown->mBool = true;
+}
+
+void nsHttpConnectionMgr::OnMsgNewTransaction(int32_t priority,
+ ARefBase* param) {
+ nsHttpTransaction* trans = static_cast<nsHttpTransaction*>(param);
+
+ LOG(("nsHttpConnectionMgr::OnMsgNewTransaction [trans=%p]\n", trans));
+ trans->SetPriority(priority);
+ nsresult rv = ProcessNewTransaction(trans);
+ if (NS_FAILED(rv)) trans->Close(rv); // for whatever its worth
+}
+
+void nsHttpConnectionMgr::OnMsgNewTransactionWithStickyConn(int32_t priority,
+ ARefBase* param) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ NewTransactionData* data = static_cast<NewTransactionData*>(param);
+ LOG(
+ ("nsHttpConnectionMgr::OnMsgNewTransactionWithStickyConn "
+ "[trans=%p, transWithStickyConn=%p, conn=%p]\n",
+ data->mTrans.get(), data->mTransWithStickyConn.get(),
+ data->mTransWithStickyConn->Connection()));
+
+ MOZ_ASSERT(data->mTransWithStickyConn &&
+ data->mTransWithStickyConn->Caps() & NS_HTTP_STICKY_CONNECTION);
+
+ data->mTrans->SetPriority(data->mPriority);
+
+ RefPtr<nsAHttpConnection> conn = data->mTransWithStickyConn->Connection();
+ if (conn && conn->IsPersistent()) {
+ // This is so far a workaround to only reuse persistent
+ // connection for authentication retry. See bug 459620 comment 4
+ // for details.
+ LOG((" Reuse connection [%p] for transaction [%p]", conn.get(),
+ data->mTrans.get()));
+ data->mTrans->SetConnection(conn);
+ }
+
+ nsresult rv = ProcessNewTransaction(data->mTrans);
+ if (NS_FAILED(rv)) {
+ data->mTrans->Close(rv); // for whatever its worth
+ }
+}
+
+void nsHttpConnectionMgr::OnMsgReschedTransaction(int32_t priority,
+ ARefBase* param) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ LOG(("nsHttpConnectionMgr::OnMsgReschedTransaction [trans=%p]\n", param));
+
+ RefPtr<nsHttpTransaction> trans = static_cast<nsHttpTransaction*>(param);
+ trans->SetPriority(priority);
+
+ if (!trans->ConnectionInfo()) {
+ return;
+ }
+ ConnectionEntry* ent = mCT.GetWeak(trans->ConnectionInfo()->HashKey());
+
+ if (ent) {
+ ent->ReschedTransaction(trans);
+ }
+}
+
+void nsHttpConnectionMgr::OnMsgUpdateClassOfServiceOnTransaction(
+ ClassOfService cos, ARefBase* param) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ LOG(
+ ("nsHttpConnectionMgr::OnMsgUpdateClassOfServiceOnTransaction "
+ "[trans=%p]\n",
+ param));
+
+ nsHttpTransaction* trans = static_cast<nsHttpTransaction*>(param);
+
+ ClassOfService previous = trans->GetClassOfService();
+ trans->SetClassOfService(cos);
+
+ // incremental change alone will not trigger a reschedule
+ if ((previous.Flags() ^ cos.Flags()) &
+ (NS_HTTP_LOAD_AS_BLOCKING | NS_HTTP_LOAD_UNBLOCKED)) {
+ Unused << RescheduleTransaction(trans, trans->Priority());
+ }
+}
+
+void nsHttpConnectionMgr::OnMsgCancelTransaction(int32_t reason,
+ ARefBase* param) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ LOG(("nsHttpConnectionMgr::OnMsgCancelTransaction [trans=%p]\n", param));
+
+ nsresult closeCode = static_cast<nsresult>(reason);
+
+ // caller holds a ref to param/trans on stack
+ nsHttpTransaction* trans = static_cast<nsHttpTransaction*>(param);
+
+ //
+ // if the transaction owns a connection and the transaction is not done,
+ // then ask the connection to close the transaction. otherwise, close the
+ // transaction directly (removing it from the pending queue first).
+ //
+ RefPtr<nsAHttpConnection> conn(trans->Connection());
+ if (conn && !trans->IsDone()) {
+ conn->CloseTransaction(trans, closeCode);
+ } else {
+ ConnectionEntry* ent = nullptr;
+ if (trans->ConnectionInfo()) {
+ ent = mCT.GetWeak(trans->ConnectionInfo()->HashKey());
+ }
+ if (ent && ent->RemoveTransFromPendingQ(trans)) {
+ LOG(
+ ("nsHttpConnectionMgr::OnMsgCancelTransaction [trans=%p]"
+ " removed from pending queue\n",
+ trans));
+ }
+
+ trans->Close(closeCode);
+
+ // Cancel is a pretty strong signal that things might be hanging
+ // so we want to cancel any null transactions related to this connection
+ // entry. They are just optimizations, but they aren't hooked up to
+ // anything that might get canceled from the rest of gecko, so best
+ // to assume that's what was meant by the cancel we did receive if
+ // it only applied to something in the queue.
+ if (ent) {
+ ent->CloseAllActiveConnsWithNullTransactcion(closeCode);
+ }
+ }
+}
+
+void nsHttpConnectionMgr::OnMsgProcessPendingQ(int32_t, ARefBase* param) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ nsHttpConnectionInfo* ci = static_cast<nsHttpConnectionInfo*>(param);
+
+ if (!ci) {
+ LOG(("nsHttpConnectionMgr::OnMsgProcessPendingQ [ci=nullptr]\n"));
+ // Try and dispatch everything
+ for (const auto& entry : mCT.Values()) {
+ Unused << ProcessPendingQForEntry(entry.get(), true);
+ }
+ return;
+ }
+
+ LOG(("nsHttpConnectionMgr::OnMsgProcessPendingQ [ci=%s]\n",
+ ci->HashKey().get()));
+
+ // start by processing the queue identified by the given connection info.
+ ConnectionEntry* ent = mCT.GetWeak(ci->HashKey());
+ if (!(ent && ProcessPendingQForEntry(ent, false))) {
+ // if we reach here, it means that we couldn't dispatch a transaction
+ // for the specified connection info. walk the connection table...
+ for (const auto& entry : mCT.Values()) {
+ if (ProcessPendingQForEntry(entry.get(), false)) {
+ break;
+ }
+ }
+ }
+}
+
+nsresult nsHttpConnectionMgr::CancelTransactions(nsHttpConnectionInfo* ci,
+ nsresult code) {
+ LOG(("nsHttpConnectionMgr::CancelTransactions %s\n", ci->HashKey().get()));
+
+ int32_t intReason = static_cast<int32_t>(code);
+ return PostEvent(&nsHttpConnectionMgr::OnMsgCancelTransactions, intReason,
+ ci);
+}
+
+void nsHttpConnectionMgr::OnMsgCancelTransactions(int32_t code,
+ ARefBase* param) {
+ nsresult reason = static_cast<nsresult>(code);
+ nsHttpConnectionInfo* ci = static_cast<nsHttpConnectionInfo*>(param);
+ ConnectionEntry* ent = mCT.GetWeak(ci->HashKey());
+ LOG(("nsHttpConnectionMgr::OnMsgCancelTransactions %s %p\n",
+ ci->HashKey().get(), ent));
+ if (ent) {
+ ent->CancelAllTransactions(reason);
+ }
+}
+
+void nsHttpConnectionMgr::OnMsgPruneDeadConnections(int32_t, ARefBase*) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ LOG(("nsHttpConnectionMgr::OnMsgPruneDeadConnections\n"));
+
+ // Reset mTimeOfNextWakeUp so that we can find a new shortest value.
+ mTimeOfNextWakeUp = UINT64_MAX;
+
+ // check canreuse() for all idle connections plus any active connections on
+ // connection entries that are using spdy.
+ if (mNumIdleConns ||
+ (mNumActiveConns && StaticPrefs::network_http_http2_enabled())) {
+ for (auto iter = mCT.Iter(); !iter.Done(); iter.Next()) {
+ RefPtr<ConnectionEntry> ent = iter.Data();
+
+ LOG((" pruning [ci=%s]\n", ent->mConnInfo->HashKey().get()));
+
+ // Find out how long it will take for next idle connection to not
+ // be reusable anymore.
+ uint32_t timeToNextExpire = ent->PruneDeadConnections();
+
+ // If time to next expire found is shorter than time to next
+ // wake-up, we need to change the time for next wake-up.
+ if (timeToNextExpire != UINT32_MAX) {
+ uint32_t now = NowInSeconds();
+ uint64_t timeOfNextExpire = now + timeToNextExpire;
+ // If pruning of dead connections is not already scheduled to
+ // happen or time found for next connection to expire is is
+ // before mTimeOfNextWakeUp, we need to schedule the pruning to
+ // happen after timeToNextExpire.
+ if (!mTimer || timeOfNextExpire < mTimeOfNextWakeUp) {
+ PruneDeadConnectionsAfter(timeToNextExpire);
+ }
+ } else {
+ ConditionallyStopPruneDeadConnectionsTimer();
+ }
+
+ ent->RemoveEmptyPendingQ();
+
+ // If this entry is empty, we have too many entries busy then
+ // we can clean it up and restart
+ if (mCT.Count() > 125 && ent->IdleConnectionsLength() == 0 &&
+ ent->ActiveConnsLength() == 0 &&
+ ent->DnsAndConnectSocketsLength() == 0 &&
+ ent->PendingQueueLength() == 0 &&
+ ent->UrgentStartQueueLength() == 0 && !ent->mDoNotDestroy &&
+ (!ent->mUsingSpdy || mCT.Count() > 300)) {
+ LOG((" removing empty connection entry\n"));
+ iter.Remove();
+ continue;
+ }
+
+ // Otherwise use this opportunity to compact our arrays...
+ ent->Compact();
+ }
+ }
+}
+
+void nsHttpConnectionMgr::OnMsgPruneNoTraffic(int32_t, ARefBase*) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ LOG(("nsHttpConnectionMgr::OnMsgPruneNoTraffic\n"));
+
+ // Prune connections without traffic
+ for (const RefPtr<ConnectionEntry>& ent : mCT.Values()) {
+ // Close the connections with no registered traffic.
+ ent->PruneNoTraffic();
+ }
+
+ mPruningNoTraffic = false; // not pruning anymore
+}
+
+void nsHttpConnectionMgr::OnMsgVerifyTraffic(int32_t, ARefBase*) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ LOG(("nsHttpConnectionMgr::OnMsgVerifyTraffic\n"));
+
+ if (mPruningNoTraffic) {
+ // Called in the time gap when the timeout to prune notraffic
+ // connections has triggered but the pruning hasn't happened yet.
+ return;
+ }
+
+ // Mark connections for traffic verification
+ for (const auto& entry : mCT.Values()) {
+ entry->VerifyTraffic();
+ }
+
+ // If the timer is already there. we just re-init it
+ if (!mTrafficTimer) {
+ mTrafficTimer = NS_NewTimer();
+ }
+
+ // failure to create a timer is not a fatal error, but dead
+ // connections will not be cleaned up as nicely
+ if (mTrafficTimer) {
+ // Give active connections time to get more traffic before killing
+ // them off. Default: 5000 milliseconds
+ mTrafficTimer->Init(this, gHttpHandler->NetworkChangedTimeout(),
+ nsITimer::TYPE_ONE_SHOT);
+ } else {
+ NS_WARNING("failed to create timer for VerifyTraffic!");
+ }
+ // Calling ActivateTimeoutTick to ensure the next timeout tick is 1s.
+ ActivateTimeoutTick();
+}
+
+void nsHttpConnectionMgr::OnMsgDoShiftReloadConnectionCleanup(int32_t,
+ ARefBase* param) {
+ LOG(("nsHttpConnectionMgr::OnMsgDoShiftReloadConnectionCleanup\n"));
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ mCoalescingHash.Clear();
+
+ nsHttpConnectionInfo* ci = static_cast<nsHttpConnectionInfo*>(param);
+
+ for (const auto& entry : mCT.Values()) {
+ entry->ClosePersistentConnections();
+ }
+
+ if (ci) ResetIPFamilyPreference(ci);
+}
+
+void nsHttpConnectionMgr::OnMsgDoSingleConnectionCleanup(int32_t,
+ ARefBase* param) {
+ LOG(("nsHttpConnectionMgr::OnMsgDoSingleConnectionCleanup\n"));
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ nsHttpConnectionInfo* ci = static_cast<nsHttpConnectionInfo*>(param);
+
+ if (!ci) {
+ return;
+ }
+
+ ConnectionEntry* entry = mCT.GetWeak(ci->HashKey());
+ if (entry) {
+ entry->ClosePersistentConnections();
+ }
+
+ ResetIPFamilyPreference(ci);
+}
+
+void nsHttpConnectionMgr::OnMsgReclaimConnection(HttpConnectionBase* conn) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ //
+ // 1) remove the connection from the active list
+ // 2) if keep-alive, add connection to idle list
+ // 3) post event to process the pending transaction queue
+ //
+
+ MOZ_ASSERT(conn);
+ ConnectionEntry* ent = conn->ConnectionInfo()
+ ? mCT.GetWeak(conn->ConnectionInfo()->HashKey())
+ : nullptr;
+
+ if (!ent) {
+ // this can happen if the connection is made outside of the
+ // connection manager and is being "reclaimed" for use with
+ // future transactions. HTTP/2 tunnels work like this.
+ bool isWildcard = false;
+ ent = GetOrCreateConnectionEntry(conn->ConnectionInfo(), true, false, false,
+ &isWildcard);
+ LOG(
+ ("nsHttpConnectionMgr::OnMsgReclaimConnection conn %p "
+ "forced new hash entry %s\n",
+ conn, conn->ConnectionInfo()->HashKey().get()));
+ }
+
+ MOZ_ASSERT(ent);
+ RefPtr<nsHttpConnectionInfo> ci(ent->mConnInfo);
+
+ LOG(("nsHttpConnectionMgr::OnMsgReclaimConnection [ent=%p conn=%p]\n", ent,
+ conn));
+
+ // If the connection is in the active list, remove that entry
+ // and the reference held by the mActiveConns list.
+ // This is never the final reference on conn as the event context
+ // is also holding one that is released at the end of this function.
+
+ RefPtr<nsHttpConnection> connTCP = do_QueryObject(conn);
+ if (!connTCP || connTCP->EverUsedSpdy()) {
+ // Spdyand Http3 connections aren't reused in the traditional HTTP way in
+ // the idleconns list, they are actively multplexed as active
+ // conns. Even when they have 0 transactions on them they are
+ // considered active connections. So when one is reclaimed it
+ // is really complete and is meant to be shut down and not
+ // reused.
+ conn->DontReuse();
+ }
+
+ // a connection that still holds a reference to a transaction was
+ // not closed naturally (i.e. it was reset or aborted) and is
+ // therefore not something that should be reused.
+ if (conn->Transaction()) {
+ conn->DontReuse();
+ }
+
+ if (NS_SUCCEEDED(ent->RemoveActiveConnection(conn))) {
+ } else if (!connTCP || connTCP->EverUsedSpdy()) {
+ LOG(("HttpConnectionBase %p not found in its connection entry, try ^anon",
+ conn));
+ // repeat for flipped anon flag as we share connection entries for spdy
+ // connections.
+ RefPtr<nsHttpConnectionInfo> anonInvertedCI(ci->Clone());
+ anonInvertedCI->SetAnonymous(!ci->GetAnonymous());
+
+ ConnectionEntry* ent = mCT.GetWeak(anonInvertedCI->HashKey());
+ if (ent) {
+ if (NS_SUCCEEDED(ent->RemoveActiveConnection(conn))) {
+ } else {
+ LOG(
+ ("HttpConnectionBase %p could not be removed from its entry's "
+ "active list",
+ conn));
+ }
+ }
+ }
+
+ if (connTCP && connTCP->CanReuse()) {
+ LOG((" adding connection to idle list\n"));
+ // Keep The idle connection list sorted with the connections that
+ // have moved the largest data pipelines at the front because these
+ // connections have the largest cwnds on the server.
+
+ // The linear search is ok here because the number of idleconns
+ // in a single entry is generally limited to a small number (i.e. 6)
+
+ ent->InsertIntoIdleConnections(connTCP);
+ } else {
+ if (ent->IsInH2WebsocketConns(conn)) {
+ ent->RemoveH2WebsocketConns(conn);
+ }
+ LOG((" connection cannot be reused; closing connection\n"));
+ conn->Close(NS_ERROR_ABORT);
+ }
+
+ OnMsgProcessPendingQ(0, ci);
+}
+
+void nsHttpConnectionMgr::OnMsgCompleteUpgrade(int32_t, ARefBase* param) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ nsresult rv = NS_OK;
+ nsCompleteUpgradeData* data = static_cast<nsCompleteUpgradeData*>(param);
+ MOZ_ASSERT(data->mTrans && data->mTrans->Caps() & NS_HTTP_STICKY_CONNECTION);
+
+ RefPtr<nsAHttpConnection> conn(data->mTrans->Connection());
+ LOG(
+ ("nsHttpConnectionMgr::OnMsgCompleteUpgrade "
+ "conn=%p listener=%p wrapped=%d\n",
+ conn.get(), data->mUpgradeListener.get(), data->mJsWrapped));
+
+ if (!conn) {
+ // Delay any error reporting to happen in transportAvailableFunc
+ rv = NS_ERROR_UNEXPECTED;
+ } else {
+ MOZ_ASSERT(!data->mSocketTransport);
+ rv = conn->TakeTransport(getter_AddRefs(data->mSocketTransport),
+ getter_AddRefs(data->mSocketIn),
+ getter_AddRefs(data->mSocketOut));
+
+ if (NS_FAILED(rv)) {
+ LOG((" conn->TakeTransport failed with %" PRIx32,
+ static_cast<uint32_t>(rv)));
+ }
+ }
+
+ RefPtr<nsCompleteUpgradeData> upgradeData(data);
+
+ nsCOMPtr<nsIAsyncInputStream> socketIn;
+ nsCOMPtr<nsIAsyncOutputStream> socketOut;
+
+ // If this is for JS, the input and output sockets need to be piped over the
+ // socket thread. Otherwise, the JS may attempt to read and/or write the
+ // sockets on the main thread, which could cause network I/O on the main
+ // thread. This is particularly bad in the case of TLS connections, because
+ // PSM and NSS rely on those connections only being used on the socket
+ // thread.
+ if (data->mJsWrapped) {
+ nsCOMPtr<nsIAsyncInputStream> pipeIn;
+ uint32_t segsize = 0;
+ uint32_t segcount = 0;
+ net_ResolveSegmentParams(segsize, segcount);
+ if (NS_SUCCEEDED(rv)) {
+ NS_NewPipe2(getter_AddRefs(pipeIn), getter_AddRefs(socketOut), true, true,
+ segsize, segcount);
+ rv = NS_AsyncCopy(pipeIn, data->mSocketOut, gSocketTransportService,
+ NS_ASYNCCOPY_VIA_READSEGMENTS, segsize);
+ }
+
+ nsCOMPtr<nsIAsyncOutputStream> pipeOut;
+ if (NS_SUCCEEDED(rv)) {
+ NS_NewPipe2(getter_AddRefs(socketIn), getter_AddRefs(pipeOut), true, true,
+ segsize, segcount);
+ rv = NS_AsyncCopy(data->mSocketIn, pipeOut, gSocketTransportService,
+ NS_ASYNCCOPY_VIA_WRITESEGMENTS, segsize);
+ }
+ } else {
+ socketIn = upgradeData->mSocketIn;
+ socketOut = upgradeData->mSocketOut;
+ }
+
+ auto transportAvailableFunc = [upgradeData{std::move(upgradeData)}, socketIn,
+ socketOut, aRv(rv)]() {
+ // Handle any potential previous errors first
+ // and call OnUpgradeFailed if necessary.
+ nsresult rv = aRv;
+
+ if (NS_FAILED(rv)) {
+ rv = upgradeData->mUpgradeListener->OnUpgradeFailed(rv);
+ if (NS_FAILED(rv)) {
+ LOG(
+ ("nsHttpConnectionMgr::OnMsgCompleteUpgrade OnUpgradeFailed failed."
+ " listener=%p\n",
+ upgradeData->mUpgradeListener.get()));
+ }
+ return;
+ }
+
+ rv = upgradeData->mUpgradeListener->OnTransportAvailable(
+ upgradeData->mSocketTransport, socketIn, socketOut);
+ if (NS_FAILED(rv)) {
+ LOG(
+ ("nsHttpConnectionMgr::OnMsgCompleteUpgrade OnTransportAvailable "
+ "failed. listener=%p\n",
+ upgradeData->mUpgradeListener.get()));
+ }
+ };
+
+ if (data->mJsWrapped) {
+ LOG(
+ ("nsHttpConnectionMgr::OnMsgCompleteUpgrade "
+ "conn=%p listener=%p wrapped=%d pass to main thread\n",
+ conn.get(), data->mUpgradeListener.get(), data->mJsWrapped));
+ NS_DispatchToMainThread(
+ NS_NewRunnableFunction("net::nsHttpConnectionMgr::OnMsgCompleteUpgrade",
+ transportAvailableFunc));
+ } else {
+ transportAvailableFunc();
+ }
+}
+
+void nsHttpConnectionMgr::OnMsgUpdateParam(int32_t inParam, ARefBase*) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ uint32_t param = static_cast<uint32_t>(inParam);
+ uint16_t name = ((param)&0xFFFF0000) >> 16;
+ uint16_t value = param & 0x0000FFFF;
+
+ switch (name) {
+ case MAX_CONNECTIONS:
+ mMaxConns = value;
+ break;
+ case MAX_URGENT_START_Q:
+ mMaxUrgentExcessiveConns = value;
+ break;
+ case MAX_PERSISTENT_CONNECTIONS_PER_HOST:
+ mMaxPersistConnsPerHost = value;
+ break;
+ case MAX_PERSISTENT_CONNECTIONS_PER_PROXY:
+ mMaxPersistConnsPerProxy = value;
+ break;
+ case MAX_REQUEST_DELAY:
+ mMaxRequestDelay = value;
+ break;
+ case THROTTLING_ENABLED:
+ SetThrottlingEnabled(!!value);
+ break;
+ case THROTTLING_SUSPEND_FOR:
+ mThrottleSuspendFor = value;
+ break;
+ case THROTTLING_RESUME_FOR:
+ mThrottleResumeFor = value;
+ break;
+ case THROTTLING_READ_LIMIT:
+ mThrottleReadLimit = value;
+ break;
+ case THROTTLING_READ_INTERVAL:
+ mThrottleReadInterval = value;
+ break;
+ case THROTTLING_HOLD_TIME:
+ mThrottleHoldTime = value;
+ break;
+ case THROTTLING_MAX_TIME:
+ mThrottleMaxTime = TimeDuration::FromMilliseconds(value);
+ break;
+ case PROXY_BE_CONSERVATIVE:
+ mBeConservativeForProxy = !!value;
+ break;
+ default:
+ MOZ_ASSERT_UNREACHABLE("unexpected parameter name");
+ }
+}
+
+// Read Timeout Tick handlers
+
+void nsHttpConnectionMgr::ActivateTimeoutTick() {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ LOG(
+ ("nsHttpConnectionMgr::ActivateTimeoutTick() "
+ "this=%p mTimeoutTick=%p\n",
+ this, mTimeoutTick.get()));
+
+ // The timer tick should be enabled if it is not already pending.
+ // Upon running the tick will rearm itself if there are active
+ // connections available.
+
+ if (mTimeoutTick && mTimeoutTickArmed) {
+ // make sure we get one iteration on a quick tick
+ if (mTimeoutTickNext > 1) {
+ mTimeoutTickNext = 1;
+ mTimeoutTick->SetDelay(1000);
+ }
+ return;
+ }
+
+ if (!mTimeoutTick) {
+ mTimeoutTick = NS_NewTimer();
+ if (!mTimeoutTick) {
+ NS_WARNING("failed to create timer for http timeout management");
+ return;
+ }
+ ReentrantMonitorAutoEnter mon(mReentrantMonitor);
+ if (!mSocketThreadTarget) {
+ NS_WARNING("cannot activate timout if not initialized or shutdown");
+ return;
+ }
+ mTimeoutTick->SetTarget(mSocketThreadTarget);
+ }
+
+ if (mIsShuttingDown) { // Atomic
+ // don't set a timer to generate an event if we're shutting down
+ // (and mSocketThreadTarget might be null or garbage if we're shutting down)
+ return;
+ }
+ MOZ_ASSERT(!mTimeoutTickArmed, "timer tick armed");
+ mTimeoutTickArmed = true;
+ mTimeoutTick->Init(this, 1000, nsITimer::TYPE_REPEATING_SLACK);
+}
+
+class UINT64Wrapper : public ARefBase {
+ public:
+ explicit UINT64Wrapper(uint64_t aUint64) : mUint64(aUint64) {}
+ NS_INLINE_DECL_THREADSAFE_REFCOUNTING(UINT64Wrapper, override)
+
+ uint64_t GetValue() { return mUint64; }
+
+ private:
+ uint64_t mUint64;
+ virtual ~UINT64Wrapper() = default;
+};
+
+nsresult nsHttpConnectionMgr::UpdateCurrentBrowserId(uint64_t aId) {
+ RefPtr<UINT64Wrapper> idWrapper = new UINT64Wrapper(aId);
+ return PostEvent(&nsHttpConnectionMgr::OnMsgUpdateCurrentBrowserId, 0,
+ idWrapper);
+}
+
+void nsHttpConnectionMgr::SetThrottlingEnabled(bool aEnable) {
+ LOG(("nsHttpConnectionMgr::SetThrottlingEnabled enable=%d", aEnable));
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ mThrottleEnabled = aEnable;
+
+ if (mThrottleEnabled) {
+ EnsureThrottleTickerIfNeeded();
+ } else {
+ DestroyThrottleTicker();
+ ResumeReadOf(mActiveTransactions[false]);
+ ResumeReadOf(mActiveTransactions[true]);
+ }
+}
+
+bool nsHttpConnectionMgr::InThrottlingTimeWindow() {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ if (mThrottlingWindowEndsAt.IsNull()) {
+ return true;
+ }
+ return TimeStamp::NowLoRes() <= mThrottlingWindowEndsAt;
+}
+
+void nsHttpConnectionMgr::TouchThrottlingTimeWindow(bool aEnsureTicker) {
+ LOG(("nsHttpConnectionMgr::TouchThrottlingTimeWindow"));
+
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ mThrottlingWindowEndsAt = TimeStamp::NowLoRes() + mThrottleMaxTime;
+
+ if (!mThrottleTicker && MOZ_LIKELY(aEnsureTicker) &&
+ MOZ_LIKELY(mThrottleEnabled)) {
+ EnsureThrottleTickerIfNeeded();
+ }
+}
+
+void nsHttpConnectionMgr::LogActiveTransactions(char operation) {
+ if (!LOG_ENABLED()) {
+ return;
+ }
+
+ nsTArray<RefPtr<nsHttpTransaction>>* trs = nullptr;
+ uint32_t au, at, bu = 0, bt = 0;
+
+ trs = mActiveTransactions[false].Get(mCurrentBrowserId);
+ au = trs ? trs->Length() : 0;
+ trs = mActiveTransactions[true].Get(mCurrentBrowserId);
+ at = trs ? trs->Length() : 0;
+
+ for (const auto& data : mActiveTransactions[false].Values()) {
+ bu += data->Length();
+ }
+ bu -= au;
+ for (const auto& data : mActiveTransactions[true].Values()) {
+ bt += data->Length();
+ }
+ bt -= at;
+
+ // Shows counts of:
+ // - unthrottled transaction for the active tab
+ // - throttled transaction for the active tab
+ // - unthrottled transaction for background tabs
+ // - throttled transaction for background tabs
+ LOG(("Active transactions %c[%u,%u,%u,%u]", operation, au, at, bu, bt));
+}
+
+void nsHttpConnectionMgr::AddActiveTransaction(nsHttpTransaction* aTrans) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ uint64_t tabId = aTrans->BrowserId();
+ bool throttled = aTrans->EligibleForThrottling();
+
+ nsTArray<RefPtr<nsHttpTransaction>>* transactions =
+ mActiveTransactions[throttled].GetOrInsertNew(tabId);
+
+ MOZ_ASSERT(!transactions->Contains(aTrans));
+
+ transactions->AppendElement(aTrans);
+
+ LOG(("nsHttpConnectionMgr::AddActiveTransaction t=%p tabid=%" PRIx64
+ "(%d) thr=%d",
+ aTrans, tabId, tabId == mCurrentBrowserId, throttled));
+ LogActiveTransactions('+');
+
+ if (tabId == mCurrentBrowserId) {
+ mActiveTabTransactionsExist = true;
+ if (!throttled) {
+ mActiveTabUnthrottledTransactionsExist = true;
+ }
+ }
+
+ // Shift the throttling window to the future (actually, makes sure
+ // that throttling will engage when there is anything to throttle.)
+ // The |false| argument means we don't need this call to ensure
+ // the ticker, since we do it just below. Calling
+ // EnsureThrottleTickerIfNeeded directly does a bit more than call
+ // from inside of TouchThrottlingTimeWindow.
+ TouchThrottlingTimeWindow(false);
+
+ if (!mThrottleEnabled) {
+ return;
+ }
+
+ EnsureThrottleTickerIfNeeded();
+}
+
+void nsHttpConnectionMgr::RemoveActiveTransaction(
+ nsHttpTransaction* aTrans, Maybe<bool> const& aOverride) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ uint64_t tabId = aTrans->BrowserId();
+ bool forActiveTab = tabId == mCurrentBrowserId;
+ bool throttled = aOverride.valueOr(aTrans->EligibleForThrottling());
+
+ nsTArray<RefPtr<nsHttpTransaction>>* transactions =
+ mActiveTransactions[throttled].Get(tabId);
+
+ if (!transactions || !transactions->RemoveElement(aTrans)) {
+ // Was not tracked as active, probably just ignore.
+ return;
+ }
+
+ LOG(("nsHttpConnectionMgr::RemoveActiveTransaction t=%p tabid=%" PRIx64
+ "(%d) thr=%d",
+ aTrans, tabId, forActiveTab, throttled));
+
+ if (!transactions->IsEmpty()) {
+ // There are still transactions of the type, hence nothing in the throttling
+ // conditions has changed and we don't need to update "Exists" caches nor we
+ // need to wake any now throttled transactions.
+ LogActiveTransactions('-');
+ return;
+ }
+
+ // To optimize the following logic, always remove the entry when the array is
+ // empty.
+ mActiveTransactions[throttled].Remove(tabId);
+ LogActiveTransactions('-');
+
+ if (forActiveTab) {
+ // Update caches of the active tab transaction existence, since it's now
+ // affected
+ if (!throttled) {
+ mActiveTabUnthrottledTransactionsExist = false;
+ }
+ if (mActiveTabTransactionsExist) {
+ mActiveTabTransactionsExist =
+ mActiveTransactions[!throttled].Contains(tabId);
+ }
+ }
+
+ if (!mThrottleEnabled) {
+ return;
+ }
+
+ bool unthrottledExist = !mActiveTransactions[false].IsEmpty();
+ bool throttledExist = !mActiveTransactions[true].IsEmpty();
+
+ if (!unthrottledExist && !throttledExist) {
+ // Nothing active globally, just get rid of the timer completely and we are
+ // done.
+ MOZ_ASSERT(!mActiveTabUnthrottledTransactionsExist);
+ MOZ_ASSERT(!mActiveTabTransactionsExist);
+
+ DestroyThrottleTicker();
+ return;
+ }
+
+ if (mThrottleVersion == 1) {
+ if (!mThrottlingInhibitsReading) {
+ // There is then nothing to wake up. Affected transactions will not be
+ // put to sleep automatically on next tick.
+ LOG((" reading not currently inhibited"));
+ return;
+ }
+ }
+
+ if (mActiveTabUnthrottledTransactionsExist) {
+ // There are still unthrottled transactions for the active tab, hence the
+ // state is unaffected and we don't need to do anything (nothing to wake).
+ LOG((" there are unthrottled for the active tab"));
+ return;
+ }
+
+ if (mActiveTabTransactionsExist) {
+ // There are only trottled transactions for the active tab.
+ // If the last transaction we just removed was a non-throttled for the
+ // active tab we can wake the throttled transactions for the active tab.
+ if (forActiveTab && !throttled) {
+ LOG((" resuming throttled for active tab"));
+ ResumeReadOf(mActiveTransactions[true].Get(mCurrentBrowserId));
+ }
+ return;
+ }
+
+ if (!unthrottledExist) {
+ // There are no unthrottled transactions for any tab. Resume all throttled,
+ // all are only for background tabs.
+ LOG((" delay resuming throttled for background tabs"));
+ DelayedResumeBackgroundThrottledTransactions();
+ return;
+ }
+
+ if (forActiveTab) {
+ // Removing the last transaction for the active tab frees up the unthrottled
+ // background tabs transactions.
+ LOG((" delay resuming unthrottled for background tabs"));
+ DelayedResumeBackgroundThrottledTransactions();
+ return;
+ }
+
+ LOG((" not resuming anything"));
+}
+
+void nsHttpConnectionMgr::UpdateActiveTransaction(nsHttpTransaction* aTrans) {
+ LOG(("nsHttpConnectionMgr::UpdateActiveTransaction ENTER t=%p", aTrans));
+
+ // First remove then add. In case of a download that is the only active
+ // transaction and has just been marked as download (goes unthrottled to
+ // throttled), adding first would cause it to be throttled for first few
+ // milliseconds - becuause it would appear as if there were both throttled
+ // and unthrottled transactions at the time.
+
+ Maybe<bool> reversed;
+ reversed.emplace(!aTrans->EligibleForThrottling());
+ RemoveActiveTransaction(aTrans, reversed);
+
+ AddActiveTransaction(aTrans);
+
+ LOG(("nsHttpConnectionMgr::UpdateActiveTransaction EXIT t=%p", aTrans));
+}
+
+bool nsHttpConnectionMgr::ShouldThrottle(nsHttpTransaction* aTrans) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ LOG(("nsHttpConnectionMgr::ShouldThrottle trans=%p", aTrans));
+
+ if (mThrottleVersion == 1) {
+ if (!mThrottlingInhibitsReading || !mThrottleEnabled) {
+ return false;
+ }
+ } else {
+ if (!mThrottleEnabled) {
+ return false;
+ }
+ }
+
+ uint64_t tabId = aTrans->BrowserId();
+ bool forActiveTab = tabId == mCurrentBrowserId;
+ bool throttled = aTrans->EligibleForThrottling();
+
+ bool stop = [=]() {
+ if (mActiveTabTransactionsExist) {
+ if (!tabId) {
+ // Chrome initiated and unidentified transactions just respect
+ // their throttle flag, when something for the active tab is happening.
+ // This also includes downloads.
+ LOG((" active tab loads, trans is tab-less, throttled=%d", throttled));
+ return throttled;
+ }
+ if (!forActiveTab) {
+ // This is a background tab request, we want them to always throttle
+ // when there are transactions running for the ative tab.
+ LOG((" active tab loads, trans not of the active tab"));
+ return true;
+ }
+
+ if (mActiveTabUnthrottledTransactionsExist) {
+ // Unthrottled transactions for the active tab take precedence
+ LOG((" active tab loads unthrottled, trans throttled=%d", throttled));
+ return throttled;
+ }
+
+ LOG((" trans for active tab, don't throttle"));
+ return false;
+ }
+
+ MOZ_ASSERT(!forActiveTab);
+
+ if (!mActiveTransactions[false].IsEmpty()) {
+ // This means there are unthrottled active transactions for background
+ // tabs. If we are here, there can't be any transactions for the active
+ // tab. (If there is no transaction for a tab id, there is no entry for it
+ // in the hashtable.)
+ LOG((" backround tab(s) load unthrottled, trans throttled=%d",
+ throttled));
+ return throttled;
+ }
+
+ // There are only unthrottled transactions for background tabs: don't
+ // throttle.
+ LOG((" backround tab(s) load throttled, don't throttle"));
+ return false;
+ }();
+
+ if (forActiveTab && !stop) {
+ // This is an active-tab transaction and is allowed to read. Hence,
+ // prolong the throttle time window to make sure all 'lower-decks'
+ // transactions will actually throttle.
+ TouchThrottlingTimeWindow();
+ return false;
+ }
+
+ // Only stop reading when in the configured throttle max-time (aka time
+ // window). This window is prolonged (restarted) by a call to
+ // TouchThrottlingTimeWindow called on new transaction activation or on
+ // receive of response bytes of an active tab transaction.
+ bool inWindow = InThrottlingTimeWindow();
+
+ LOG((" stop=%d, in-window=%d, delayed-bck-timer=%d", stop, inWindow,
+ !!mDelayedResumeReadTimer));
+
+ if (!forActiveTab) {
+ // If the delayed background resume timer exists, background transactions
+ // are scheduled to be woken after a delay, hence leave them throttled.
+ inWindow = inWindow || mDelayedResumeReadTimer;
+ }
+
+ return stop && inWindow;
+}
+
+bool nsHttpConnectionMgr::IsConnEntryUnderPressure(
+ nsHttpConnectionInfo* connInfo) {
+ ConnectionEntry* ent = mCT.GetWeak(connInfo->HashKey());
+ if (!ent) {
+ // No entry, no pressure.
+ return false;
+ }
+
+ return ent->PendingQueueLengthForWindow(mCurrentBrowserId) > 0;
+}
+
+bool nsHttpConnectionMgr::IsThrottleTickerNeeded() {
+ LOG(("nsHttpConnectionMgr::IsThrottleTickerNeeded"));
+
+ if (mActiveTabUnthrottledTransactionsExist &&
+ mActiveTransactions[false].Count() > 1) {
+ LOG((" there are unthrottled transactions for both active and bck"));
+ return true;
+ }
+
+ if (mActiveTabTransactionsExist && mActiveTransactions[true].Count() > 1) {
+ LOG((" there are throttled transactions for both active and bck"));
+ return true;
+ }
+
+ if (!mActiveTransactions[true].IsEmpty() &&
+ !mActiveTransactions[false].IsEmpty()) {
+ LOG((" there are both throttled and unthrottled transactions"));
+ return true;
+ }
+
+ LOG((" nothing to throttle"));
+ return false;
+}
+
+void nsHttpConnectionMgr::EnsureThrottleTickerIfNeeded() {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ LOG(("nsHttpConnectionMgr::EnsureThrottleTickerIfNeeded"));
+ if (!IsThrottleTickerNeeded()) {
+ return;
+ }
+
+ // There is a new demand to throttle, hence unschedule delayed resume
+ // of background throttled transastions.
+ CancelDelayedResumeBackgroundThrottledTransactions();
+
+ if (mThrottleTicker) {
+ return;
+ }
+
+ mThrottleTicker = NS_NewTimer();
+ if (mThrottleTicker) {
+ if (mThrottleVersion == 1) {
+ MOZ_ASSERT(!mThrottlingInhibitsReading);
+
+ mThrottleTicker->Init(this, mThrottleSuspendFor, nsITimer::TYPE_ONE_SHOT);
+ mThrottlingInhibitsReading = true;
+ } else {
+ mThrottleTicker->Init(this, mThrottleReadInterval,
+ nsITimer::TYPE_ONE_SHOT);
+ }
+ }
+
+ LogActiveTransactions('^');
+}
+
+// Can be called with or without the monitor held
+void nsHttpConnectionMgr::DestroyThrottleTicker() {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ // Nothing to throttle, hence no need for this timer anymore.
+ CancelDelayedResumeBackgroundThrottledTransactions();
+
+ MOZ_ASSERT(!mThrottleEnabled || !IsThrottleTickerNeeded());
+
+ if (!mThrottleTicker) {
+ return;
+ }
+
+ LOG(("nsHttpConnectionMgr::DestroyThrottleTicker"));
+ mThrottleTicker->Cancel();
+ mThrottleTicker = nullptr;
+
+ if (mThrottleVersion == 1) {
+ mThrottlingInhibitsReading = false;
+ }
+
+ LogActiveTransactions('v');
+}
+
+void nsHttpConnectionMgr::ThrottlerTick() {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ if (mThrottleVersion == 1) {
+ mThrottlingInhibitsReading = !mThrottlingInhibitsReading;
+
+ LOG(("nsHttpConnectionMgr::ThrottlerTick inhibit=%d",
+ mThrottlingInhibitsReading));
+
+ // If there are only background transactions to be woken after a delay, keep
+ // the ticker so that we woke them only for the resume-for interval and then
+ // throttle them again until the background-resume delay passes.
+ if (!mThrottlingInhibitsReading && !mDelayedResumeReadTimer &&
+ (!IsThrottleTickerNeeded() || !InThrottlingTimeWindow())) {
+ LOG((" last tick"));
+ mThrottleTicker = nullptr;
+ }
+
+ if (mThrottlingInhibitsReading) {
+ if (mThrottleTicker) {
+ mThrottleTicker->Init(this, mThrottleSuspendFor,
+ nsITimer::TYPE_ONE_SHOT);
+ }
+ } else {
+ if (mThrottleTicker) {
+ mThrottleTicker->Init(this, mThrottleResumeFor,
+ nsITimer::TYPE_ONE_SHOT);
+ }
+
+ ResumeReadOf(mActiveTransactions[false], true);
+ ResumeReadOf(mActiveTransactions[true]);
+ }
+ } else {
+ LOG(("nsHttpConnectionMgr::ThrottlerTick"));
+
+ // If there are only background transactions to be woken after a delay, keep
+ // the ticker so that we still keep the low read limit for that time.
+ if (!mDelayedResumeReadTimer &&
+ (!IsThrottleTickerNeeded() || !InThrottlingTimeWindow())) {
+ LOG((" last tick"));
+ mThrottleTicker = nullptr;
+ }
+
+ if (mThrottleTicker) {
+ mThrottleTicker->Init(this, mThrottleReadInterval,
+ nsITimer::TYPE_ONE_SHOT);
+ }
+
+ ResumeReadOf(mActiveTransactions[false], true);
+ ResumeReadOf(mActiveTransactions[true]);
+ }
+}
+
+void nsHttpConnectionMgr::DelayedResumeBackgroundThrottledTransactions() {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ if (mThrottleVersion == 1) {
+ if (mDelayedResumeReadTimer) {
+ return;
+ }
+ } else {
+ // If the mThrottleTicker doesn't exist, there is nothing currently
+ // being throttled. Hence, don't invoke the hold time interval.
+ // This is called also when a single download transaction becomes
+ // marked as throttleable. We would otherwise block it unnecessarily.
+ if (mDelayedResumeReadTimer || !mThrottleTicker) {
+ return;
+ }
+ }
+
+ LOG(("nsHttpConnectionMgr::DelayedResumeBackgroundThrottledTransactions"));
+ NS_NewTimerWithObserver(getter_AddRefs(mDelayedResumeReadTimer), this,
+ mThrottleHoldTime, nsITimer::TYPE_ONE_SHOT);
+}
+
+void nsHttpConnectionMgr::CancelDelayedResumeBackgroundThrottledTransactions() {
+ if (!mDelayedResumeReadTimer) {
+ return;
+ }
+
+ LOG(
+ ("nsHttpConnectionMgr::"
+ "CancelDelayedResumeBackgroundThrottledTransactions"));
+ mDelayedResumeReadTimer->Cancel();
+ mDelayedResumeReadTimer = nullptr;
+}
+
+void nsHttpConnectionMgr::ResumeBackgroundThrottledTransactions() {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ LOG(("nsHttpConnectionMgr::ResumeBackgroundThrottledTransactions"));
+ mDelayedResumeReadTimer = nullptr;
+
+ if (!IsThrottleTickerNeeded()) {
+ DestroyThrottleTicker();
+ }
+
+ if (!mActiveTransactions[false].IsEmpty()) {
+ ResumeReadOf(mActiveTransactions[false], true);
+ } else {
+ ResumeReadOf(mActiveTransactions[true], true);
+ }
+}
+
+void nsHttpConnectionMgr::ResumeReadOf(
+ nsClassHashtable<nsUint64HashKey, nsTArray<RefPtr<nsHttpTransaction>>>&
+ hashtable,
+ bool excludeForActiveTab) {
+ for (const auto& entry : hashtable) {
+ if (excludeForActiveTab && entry.GetKey() == mCurrentBrowserId) {
+ // These have never been throttled (never stopped reading)
+ continue;
+ }
+ ResumeReadOf(entry.GetWeak());
+ }
+}
+
+void nsHttpConnectionMgr::ResumeReadOf(
+ nsTArray<RefPtr<nsHttpTransaction>>* transactions) {
+ MOZ_ASSERT(transactions);
+
+ for (const auto& trans : *transactions) {
+ trans->ResumeReading();
+ }
+}
+
+void nsHttpConnectionMgr::NotifyConnectionOfBrowserIdChange(
+ uint64_t previousId) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ nsTArray<RefPtr<nsHttpTransaction>>* transactions = nullptr;
+ nsTArray<RefPtr<nsAHttpConnection>> connections;
+
+ auto addConnectionHelper =
+ [&connections](nsTArray<RefPtr<nsHttpTransaction>>* trans) {
+ if (!trans) {
+ return;
+ }
+
+ for (const auto& t : *trans) {
+ RefPtr<nsAHttpConnection> conn = t->Connection();
+ if (conn && !connections.Contains(conn)) {
+ connections.AppendElement(conn);
+ }
+ }
+ };
+
+ // Get unthrottled transactions with the previous and current window id.
+ transactions = mActiveTransactions[false].Get(previousId);
+ addConnectionHelper(transactions);
+ transactions = mActiveTransactions[false].Get(mCurrentBrowserId);
+ addConnectionHelper(transactions);
+
+ // Get throttled transactions with the previous and current window id.
+ transactions = mActiveTransactions[true].Get(previousId);
+ addConnectionHelper(transactions);
+ transactions = mActiveTransactions[true].Get(mCurrentBrowserId);
+ addConnectionHelper(transactions);
+
+ for (const auto& conn : connections) {
+ conn->CurrentBrowserIdChanged(mCurrentBrowserId);
+ }
+}
+
+void nsHttpConnectionMgr::OnMsgUpdateCurrentBrowserId(int32_t aLoading,
+ ARefBase* param) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ uint64_t id = static_cast<UINT64Wrapper*>(param)->GetValue();
+
+ if (mCurrentBrowserId == id) {
+ // duplicate notification
+ return;
+ }
+
+ bool activeTabWasLoading = mActiveTabTransactionsExist;
+
+ uint64_t previousId = mCurrentBrowserId;
+ mCurrentBrowserId = id;
+
+ if (gHttpHandler->ActiveTabPriority()) {
+ NotifyConnectionOfBrowserIdChange(previousId);
+ }
+
+ LOG(
+ ("nsHttpConnectionMgr::OnMsgUpdateCurrentBrowserId"
+ " id=%" PRIx64 "\n",
+ mCurrentBrowserId));
+
+ nsTArray<RefPtr<nsHttpTransaction>>* transactions = nullptr;
+
+ // Update the "Exists" caches and resume any transactions that now deserve it,
+ // changing the active tab changes the conditions for throttling.
+ transactions = mActiveTransactions[false].Get(mCurrentBrowserId);
+ mActiveTabUnthrottledTransactionsExist = !!transactions;
+
+ if (!mActiveTabUnthrottledTransactionsExist) {
+ transactions = mActiveTransactions[true].Get(mCurrentBrowserId);
+ }
+ mActiveTabTransactionsExist = !!transactions;
+
+ if (transactions) {
+ // This means there are some transactions for this newly activated tab,
+ // resume them but anything else.
+ LOG((" resuming newly activated tab transactions"));
+ ResumeReadOf(transactions);
+ return;
+ }
+
+ if (!activeTabWasLoading) {
+ // There were no transactions for the previously active tab, hence
+ // all remaning transactions, if there were, were all unthrottled,
+ // no need to wake them.
+ return;
+ }
+
+ if (!mActiveTransactions[false].IsEmpty()) {
+ LOG((" resuming unthrottled background transactions"));
+ ResumeReadOf(mActiveTransactions[false]);
+ return;
+ }
+
+ if (!mActiveTransactions[true].IsEmpty()) {
+ LOG((" resuming throttled background transactions"));
+ ResumeReadOf(mActiveTransactions[true]);
+ return;
+ }
+
+ DestroyThrottleTicker();
+}
+
+void nsHttpConnectionMgr::TimeoutTick() {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ MOZ_ASSERT(mTimeoutTick, "no readtimeout tick");
+
+ LOG(("nsHttpConnectionMgr::TimeoutTick active=%d\n", mNumActiveConns));
+ // The next tick will be between 1 second and 1 hr
+ // Set it to the max value here, and the TimeoutTick()s can
+ // reduce it to their local needs.
+ mTimeoutTickNext = 3600; // 1hr
+
+ for (const RefPtr<ConnectionEntry>& ent : mCT.Values()) {
+ uint32_t timeoutTickNext = ent->TimeoutTick();
+ mTimeoutTickNext = std::min(mTimeoutTickNext, timeoutTickNext);
+ }
+
+ if (mTimeoutTick) {
+ mTimeoutTickNext = std::max(mTimeoutTickNext, 1U);
+ mTimeoutTick->SetDelay(mTimeoutTickNext * 1000);
+ }
+}
+
+// GetOrCreateConnectionEntry finds a ent for a particular CI for use in
+// dispatching a transaction according to these rules
+// 1] use an ent that matches the ci that can be dispatched immediately
+// 2] otherwise use an ent of wildcard(ci) than can be dispatched immediately
+// 3] otherwise create an ent that matches ci and make new conn on it
+
+ConnectionEntry* nsHttpConnectionMgr::GetOrCreateConnectionEntry(
+ nsHttpConnectionInfo* specificCI, bool prohibitWildCard, bool aNoHttp2,
+ bool aNoHttp3, bool* aIsWildcard, bool* aAvailableForDispatchNow) {
+ if (aAvailableForDispatchNow) {
+ *aAvailableForDispatchNow = false;
+ }
+ *aIsWildcard = false;
+
+ // step 1
+ ConnectionEntry* specificEnt = mCT.GetWeak(specificCI->HashKey());
+ if (specificEnt && specificEnt->AvailableForDispatchNow()) {
+ if (aAvailableForDispatchNow) {
+ *aAvailableForDispatchNow = true;
+ }
+ return specificEnt;
+ }
+
+ // step 1 repeated for an inverted anonymous flag; we return an entry
+ // only when it has an h2 established connection that is not authenticated
+ // with a client certificate.
+ RefPtr<nsHttpConnectionInfo> anonInvertedCI(specificCI->Clone());
+ anonInvertedCI->SetAnonymous(!specificCI->GetAnonymous());
+ ConnectionEntry* invertedEnt = mCT.GetWeak(anonInvertedCI->HashKey());
+ if (invertedEnt) {
+ HttpConnectionBase* h2orh3conn =
+ GetH2orH3ActiveConn(invertedEnt, aNoHttp2, aNoHttp3);
+ if (h2orh3conn && h2orh3conn->IsExperienced() &&
+ h2orh3conn->NoClientCertAuth()) {
+ MOZ_ASSERT(h2orh3conn->UsingSpdy() || h2orh3conn->UsingHttp3());
+ LOG(
+ ("GetOrCreateConnectionEntry is coalescing h2/3 an/onymous "
+ "connections, ent=%p",
+ invertedEnt));
+ return invertedEnt;
+ }
+ }
+
+ if (!specificCI->UsingHttpsProxy()) {
+ prohibitWildCard = true;
+ }
+
+ // step 2
+ if (!prohibitWildCard && aNoHttp3) {
+ RefPtr<nsHttpConnectionInfo> wildCardProxyCI;
+ DebugOnly<nsresult> rv =
+ specificCI->CreateWildCard(getter_AddRefs(wildCardProxyCI));
+ MOZ_ASSERT(NS_SUCCEEDED(rv));
+ ConnectionEntry* wildCardEnt = mCT.GetWeak(wildCardProxyCI->HashKey());
+ if (wildCardEnt && wildCardEnt->AvailableForDispatchNow()) {
+ if (aAvailableForDispatchNow) {
+ *aAvailableForDispatchNow = true;
+ }
+ *aIsWildcard = true;
+ return wildCardEnt;
+ }
+ }
+
+ // step 3
+ if (!specificEnt) {
+ RefPtr<nsHttpConnectionInfo> clone(specificCI->Clone());
+ specificEnt = new ConnectionEntry(clone);
+ mCT.InsertOrUpdate(clone->HashKey(), RefPtr{specificEnt});
+ }
+ return specificEnt;
+}
+
+void nsHttpConnectionMgr::DoSpeculativeConnection(
+ SpeculativeTransaction* aTrans, bool aFetchHTTPSRR) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ MOZ_ASSERT(aTrans);
+
+ bool isWildcard = false;
+ ConnectionEntry* ent = GetOrCreateConnectionEntry(
+ aTrans->ConnectionInfo(), false, aTrans->Caps() & NS_HTTP_DISALLOW_SPDY,
+ aTrans->Caps() & NS_HTTP_DISALLOW_HTTP3, &isWildcard);
+ if (!aFetchHTTPSRR &&
+ gHttpHandler->EchConfigEnabled(aTrans->ConnectionInfo()->IsHttp3())) {
+ // This happens when this is called from
+ // SpeculativeTransaction::OnHTTPSRRAvailable. We have to update this
+ // entry's echConfig so that the newly created connection can use the latest
+ // echConfig.
+ ent->MaybeUpdateEchConfig(aTrans->ConnectionInfo());
+ }
+ DoSpeculativeConnectionInternal(ent, aTrans, aFetchHTTPSRR);
+}
+
+void nsHttpConnectionMgr::DoSpeculativeConnectionInternal(
+ ConnectionEntry* aEnt, SpeculativeTransaction* aTrans, bool aFetchHTTPSRR) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ MOZ_ASSERT(aTrans);
+ MOZ_ASSERT(aEnt);
+ if (!gHttpHandler->Active()) {
+ // Do nothing if we are shutting down.
+ return;
+ }
+
+ if (aFetchHTTPSRR && NS_SUCCEEDED(aTrans->FetchHTTPSRR())) {
+ // nsHttpConnectionMgr::DoSpeculativeConnection will be called again when
+ // HTTPS RR is available.
+ return;
+ }
+
+ uint32_t parallelSpeculativeConnectLimit =
+ aTrans->ParallelSpeculativeConnectLimit()
+ ? *aTrans->ParallelSpeculativeConnectLimit()
+ : gHttpHandler->ParallelSpeculativeConnectLimit();
+ bool ignoreIdle = aTrans->IgnoreIdle() ? *aTrans->IgnoreIdle() : false;
+ bool isFromPredictor =
+ aTrans->IsFromPredictor() ? *aTrans->IsFromPredictor() : false;
+ bool allow1918 = aTrans->Allow1918() ? *aTrans->Allow1918() : false;
+
+ bool keepAlive = aTrans->Caps() & NS_HTTP_ALLOW_KEEPALIVE;
+ if (mNumDnsAndConnectSockets < parallelSpeculativeConnectLimit &&
+ ((ignoreIdle &&
+ (aEnt->IdleConnectionsLength() < parallelSpeculativeConnectLimit)) ||
+ !aEnt->IdleConnectionsLength()) &&
+ !(keepAlive && aEnt->RestrictConnections()) &&
+ !AtActiveConnectionLimit(aEnt, aTrans->Caps())) {
+ nsresult rv = aEnt->CreateDnsAndConnectSocket(aTrans, aTrans->Caps(), true,
+ isFromPredictor, false,
+ allow1918, nullptr);
+ if (NS_FAILED(rv)) {
+ glean::networking::speculative_connect_outcome
+ .Get("aborted_socket_fail"_ns)
+ .Add(1);
+ LOG(
+ ("DoSpeculativeConnectionInternal Transport socket creation "
+ "failure: %" PRIx32 "\n",
+ static_cast<uint32_t>(rv)));
+ } else {
+ glean::networking::speculative_connect_outcome.Get("successful"_ns)
+ .Add(1);
+ }
+ } else {
+ glean::networking::speculative_connect_outcome
+ .Get("aborted_socket_limit"_ns)
+ .Add(1);
+ LOG(
+ ("DoSpeculativeConnectionInternal Transport ci=%s "
+ "not created due to existing connection count:%d",
+ aEnt->mConnInfo->HashKey().get(), parallelSpeculativeConnectLimit));
+ }
+}
+
+void nsHttpConnectionMgr::DoFallbackConnection(SpeculativeTransaction* aTrans,
+ bool aFetchHTTPSRR) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ MOZ_ASSERT(aTrans);
+
+ LOG(("nsHttpConnectionMgr::DoFallbackConnection"));
+
+ bool availableForDispatchNow = false;
+ bool aIsWildcard = false;
+ ConnectionEntry* ent = GetOrCreateConnectionEntry(
+ aTrans->ConnectionInfo(), false, aTrans->Caps() & NS_HTTP_DISALLOW_SPDY,
+ aTrans->Caps() & NS_HTTP_DISALLOW_HTTP3, &aIsWildcard,
+ &availableForDispatchNow);
+
+ if (availableForDispatchNow) {
+ LOG(
+ ("nsHttpConnectionMgr::DoFallbackConnection fallback connection is "
+ "ready for dispatching ent=%p",
+ ent));
+ aTrans->InvokeCallback();
+ return;
+ }
+
+ DoSpeculativeConnectionInternal(ent, aTrans, aFetchHTTPSRR);
+}
+
+void nsHttpConnectionMgr::OnMsgSpeculativeConnect(int32_t, ARefBase* param) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ SpeculativeConnectArgs* args = static_cast<SpeculativeConnectArgs*>(param);
+
+ LOG(
+ ("nsHttpConnectionMgr::OnMsgSpeculativeConnect [ci=%s, "
+ "mFetchHTTPSRR=%d]\n",
+ args->mTrans->ConnectionInfo()->HashKey().get(), args->mFetchHTTPSRR));
+ DoSpeculativeConnection(args->mTrans, args->mFetchHTTPSRR);
+}
+
+bool nsHttpConnectionMgr::BeConservativeIfProxied(nsIProxyInfo* proxy) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ if (mBeConservativeForProxy) {
+ // The pref says to be conservative for proxies.
+ return true;
+ }
+
+ if (!proxy) {
+ // There is no proxy, so be conservative by default.
+ return true;
+ }
+
+ // Be conservative only if there is no proxy host set either.
+ // This logic was copied from nsSSLIOLayerAddToSocket.
+ nsAutoCString proxyHost;
+ proxy->GetHost(proxyHost);
+ return proxyHost.IsEmpty();
+}
+
+// register a connection to receive CanJoinConnection() for particular
+// origin keys
+void nsHttpConnectionMgr::RegisterOriginCoalescingKey(HttpConnectionBase* conn,
+ const nsACString& host,
+ int32_t port) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ nsHttpConnectionInfo* ci = conn ? conn->ConnectionInfo() : nullptr;
+ if (!ci || !conn->CanDirectlyActivate()) {
+ return;
+ }
+
+ nsCString newKey;
+ BuildOriginFrameHashKey(newKey, ci, host, port);
+ mCoalescingHash.GetOrInsertNew(newKey, 1)->AppendElement(
+ do_GetWeakReference(static_cast<nsISupportsWeakReference*>(conn)));
+
+ LOG(
+ ("nsHttpConnectionMgr::RegisterOriginCoalescingKey "
+ "Established New Coalescing Key %s to %p %s\n",
+ newKey.get(), conn, ci->HashKey().get()));
+}
+
+bool nsHttpConnectionMgr::GetConnectionData(nsTArray<HttpRetParams>* aArg) {
+ for (const RefPtr<ConnectionEntry>& ent : mCT.Values()) {
+ if (ent->mConnInfo->GetPrivate()) {
+ continue;
+ }
+ aArg->AppendElement(ent->GetConnectionData());
+ }
+
+ return true;
+}
+
+void nsHttpConnectionMgr::ResetIPFamilyPreference(nsHttpConnectionInfo* ci) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ ConnectionEntry* ent = mCT.GetWeak(ci->HashKey());
+ if (ent) {
+ ent->ResetIPFamilyPreference();
+ }
+}
+
+void nsHttpConnectionMgr::ExcludeHttp2(const nsHttpConnectionInfo* ci) {
+ LOG(("nsHttpConnectionMgr::ExcludeHttp2 excluding ci %s",
+ ci->HashKey().BeginReading()));
+ ConnectionEntry* ent = mCT.GetWeak(ci->HashKey());
+ if (!ent) {
+ LOG(("nsHttpConnectionMgr::ExcludeHttp2 no entry found?!"));
+ return;
+ }
+
+ ent->DisallowHttp2();
+}
+
+void nsHttpConnectionMgr::ExcludeHttp3(const nsHttpConnectionInfo* ci) {
+ LOG(("nsHttpConnectionMgr::ExcludeHttp3 exclude ci %s",
+ ci->HashKey().BeginReading()));
+ ConnectionEntry* ent = mCT.GetWeak(ci->HashKey());
+ if (!ent) {
+ LOG(("nsHttpConnectionMgr::ExcludeHttp3 no entry found?!"));
+ return;
+ }
+
+ ent->DontReuseHttp3Conn();
+}
+
+void nsHttpConnectionMgr::MoveToWildCardConnEntry(
+ nsHttpConnectionInfo* specificCI, nsHttpConnectionInfo* wildCardCI,
+ HttpConnectionBase* proxyConn) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ MOZ_ASSERT(specificCI->UsingHttpsProxy());
+
+ LOG(
+ ("nsHttpConnectionMgr::MakeConnEntryWildCard conn %p has requested to "
+ "change CI from %s to %s\n",
+ proxyConn, specificCI->HashKey().get(), wildCardCI->HashKey().get()));
+
+ ConnectionEntry* ent = mCT.GetWeak(specificCI->HashKey());
+ LOG(
+ ("nsHttpConnectionMgr::MakeConnEntryWildCard conn %p using ent %p (spdy "
+ "%d)\n",
+ proxyConn, ent, ent ? ent->mUsingSpdy : 0));
+
+ if (!ent || !ent->mUsingSpdy) {
+ return;
+ }
+
+ bool isWildcard = false;
+ ConnectionEntry* wcEnt =
+ GetOrCreateConnectionEntry(wildCardCI, true, false, false, &isWildcard);
+ if (wcEnt == ent) {
+ // nothing to do!
+ return;
+ }
+ wcEnt->mUsingSpdy = true;
+
+ LOG(
+ ("nsHttpConnectionMgr::MakeConnEntryWildCard ent %p "
+ "idle=%zu active=%zu half=%zu pending=%zu\n",
+ ent, ent->IdleConnectionsLength(), ent->ActiveConnsLength(),
+ ent->DnsAndConnectSocketsLength(), ent->PendingQueueLength()));
+
+ LOG(
+ ("nsHttpConnectionMgr::MakeConnEntryWildCard wc-ent %p "
+ "idle=%zu active=%zu half=%zu pending=%zu\n",
+ wcEnt, wcEnt->IdleConnectionsLength(), wcEnt->ActiveConnsLength(),
+ wcEnt->DnsAndConnectSocketsLength(), wcEnt->PendingQueueLength()));
+
+ ent->MoveConnection(proxyConn, wcEnt);
+}
+
+bool nsHttpConnectionMgr::RemoveTransFromConnEntry(nsHttpTransaction* aTrans,
+ const nsACString& aHashKey) {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+
+ LOG(("nsHttpConnectionMgr::RemoveTransFromConnEntry: trans=%p ci=%s", aTrans,
+ PromiseFlatCString(aHashKey).get()));
+
+ if (aHashKey.IsEmpty()) {
+ return false;
+ }
+
+ // Step 1: Get the transaction's connection entry.
+ ConnectionEntry* entry = mCT.GetWeak(aHashKey);
+ if (!entry) {
+ return false;
+ }
+
+ // Step 2: Try to find the undispatched transaction.
+ return entry->RemoveTransFromPendingQ(aTrans);
+}
+
+void nsHttpConnectionMgr::IncreaseNumDnsAndConnectSockets() {
+ mNumDnsAndConnectSockets++;
+}
+
+void nsHttpConnectionMgr::DecreaseNumDnsAndConnectSockets() {
+ MOZ_ASSERT(mNumDnsAndConnectSockets);
+ if (mNumDnsAndConnectSockets) { // just in case
+ mNumDnsAndConnectSockets--;
+ }
+}
+
+already_AddRefed<PendingTransactionInfo>
+nsHttpConnectionMgr::FindTransactionHelper(bool removeWhenFound,
+ ConnectionEntry* aEnt,
+ nsAHttpTransaction* aTrans) {
+ nsTArray<RefPtr<PendingTransactionInfo>>* pendingQ =
+ aEnt->GetTransactionPendingQHelper(aTrans);
+
+ int32_t index =
+ pendingQ ? pendingQ->IndexOf(aTrans, 0, PendingComparator()) : -1;
+
+ RefPtr<PendingTransactionInfo> info;
+ if (index != -1) {
+ info = (*pendingQ)[index];
+ if (removeWhenFound) {
+ pendingQ->RemoveElementAt(index);
+ }
+ }
+ return info.forget();
+}
+
+already_AddRefed<ConnectionEntry> nsHttpConnectionMgr::FindConnectionEntry(
+ const nsHttpConnectionInfo* ci) {
+ return mCT.Get(ci->HashKey());
+}
+
+nsHttpConnectionMgr* nsHttpConnectionMgr::AsHttpConnectionMgr() { return this; }
+
+HttpConnectionMgrParent* nsHttpConnectionMgr::AsHttpConnectionMgrParent() {
+ return nullptr;
+}
+
+void nsHttpConnectionMgr::NewIdleConnectionAdded(uint32_t timeToLive) {
+ mNumIdleConns++;
+
+ // If the added connection was first idle connection or has shortest
+ // time to live among the watched connections, pruning dead
+ // connections needs to be done when it can't be reused anymore.
+ if (!mTimer || NowInSeconds() + timeToLive < mTimeOfNextWakeUp) {
+ PruneDeadConnectionsAfter(timeToLive);
+ }
+}
+
+void nsHttpConnectionMgr::DecrementNumIdleConns() {
+ MOZ_ASSERT(mNumIdleConns);
+ mNumIdleConns--;
+ ConditionallyStopPruneDeadConnectionsTimer();
+}
+
+void nsHttpConnectionMgr::CheckTransInPendingQueue(nsHttpTransaction* aTrans) {
+#ifdef MOZ_DIAGNOSTIC_ASSERT_ENABLED
+ // We only do this check on socket thread. When this function is called on
+ // main thread, the transaction is newly created, so we can skip this check.
+ if (!OnSocketThread()) {
+ return;
+ }
+
+ nsAutoCString hashKey;
+ aTrans->GetHashKeyOfConnectionEntry(hashKey);
+ if (hashKey.IsEmpty()) {
+ return;
+ }
+
+ bool foundInPendingQ = RemoveTransFromConnEntry(aTrans, hashKey);
+ MOZ_DIAGNOSTIC_ASSERT(!foundInPendingQ);
+#endif
+}
+
+bool nsHttpConnectionMgr::AllowToRetryDifferentIPFamilyForHttp3(
+ nsHttpConnectionInfo* ci, nsresult aError) {
+ ConnectionEntry* ent = mCT.GetWeak(ci->HashKey());
+ if (!ent) {
+ return false;
+ }
+
+ return ent->AllowToRetryDifferentIPFamilyForHttp3(aError);
+}
+
+void nsHttpConnectionMgr::SetRetryDifferentIPFamilyForHttp3(
+ nsHttpConnectionInfo* ci, uint16_t aIPFamily) {
+ ConnectionEntry* ent = mCT.GetWeak(ci->HashKey());
+ if (!ent) {
+ return;
+ }
+
+ ent->SetRetryDifferentIPFamilyForHttp3(aIPFamily);
+}
+
+} // namespace mozilla::net