1 files changed, 384 insertions, 0 deletions
diff --git a/netwerk/protocol/http/nsHttpConnection.h b/netwerk/protocol/http/nsHttpConnection.h
new file mode 100644
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+++ b/netwerk/protocol/http/nsHttpConnection.h
@@ -0,0 +1,384 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+#ifndef nsHttpConnection_h__
+#define nsHttpConnection_h__
+
+#include <functional>
+#include "HttpConnectionBase.h"
+#include "nsHttpConnectionInfo.h"
+#include "nsHttpResponseHead.h"
+#include "nsAHttpTransaction.h"
+#include "nsCOMPtr.h"
+#include "nsProxyRelease.h"
+#include "prinrval.h"
+#include "mozilla/Mutex.h"
+#include "ARefBase.h"
+#include "TimingStruct.h"
+#include "HttpTrafficAnalyzer.h"
+#include "TlsHandshaker.h"
+
+#include "nsIAsyncInputStream.h"
+#include "nsIAsyncOutputStream.h"
+#include "nsIInterfaceRequestor.h"
+#include "nsISocketTransport.h"
+#include "nsISupportsPriority.h"
+#include "nsITimer.h"
+#include "nsITlsHandshakeListener.h"
+
+class nsISocketTransport;
+class nsITLSSocketControl;
+
+namespace mozilla {
+namespace net {
+
+class nsHttpHandler;
+class ASpdySession;
+
+// 1dcc863e-db90-4652-a1fe-13fea0b54e46
+#define NS_HTTPCONNECTION_IID                        \
+  {                                                  \
+    0x1dcc863e, 0xdb90, 0x4652, {                    \
+      0xa1, 0xfe, 0x13, 0xfe, 0xa0, 0xb5, 0x4e, 0x46 \
+    }                                                \
+  }
+
+//-----------------------------------------------------------------------------
+// nsHttpConnection - represents a connection to a HTTP server (or proxy)
+//
+// NOTE: this objects lives on the socket thread only.  it should not be
+// accessed from any other thread.
+//-----------------------------------------------------------------------------
+
+class nsHttpConnection final : public HttpConnectionBase,
+                               public nsAHttpSegmentReader,
+                               public nsAHttpSegmentWriter,
+                               public nsIInputStreamCallback,
+                               public nsIOutputStreamCallback,
+                               public nsITransportEventSink,
+                               public nsIInterfaceRequestor {
+ private:
+  virtual ~nsHttpConnection();
+
+ public:
+  NS_DECLARE_STATIC_IID_ACCESSOR(NS_HTTPCONNECTION_IID)
+  NS_DECL_HTTPCONNECTIONBASE
+  NS_DECL_THREADSAFE_ISUPPORTS
+  NS_DECL_NSAHTTPSEGMENTREADER
+  NS_DECL_NSAHTTPSEGMENTWRITER
+  NS_DECL_NSIINPUTSTREAMCALLBACK
+  NS_DECL_NSIOUTPUTSTREAMCALLBACK
+  NS_DECL_NSITRANSPORTEVENTSINK
+  NS_DECL_NSIINTERFACEREQUESTOR
+
+  nsHttpConnection();
+
+  // Initialize the connection:
+  //  info        - specifies the connection parameters.
+  //  maxHangTime - limits the amount of time this connection can spend on a
+  //                single transaction before it should no longer be kept
+  //                alive.  a value of 0xffff indicates no limit.
+  [[nodiscard]] virtual nsresult Init(nsHttpConnectionInfo* info,
+                                      uint16_t maxHangTime, nsISocketTransport*,
+                                      nsIAsyncInputStream*,
+                                      nsIAsyncOutputStream*,
+                                      bool connectedTransport, nsresult status,
+                                      nsIInterfaceRequestor*, PRIntervalTime,
+                                      bool forWebSocket);
+
+  //-------------------------------------------------------------------------
+  // XXX document when these are ok to call
+
+  bool IsKeepAlive() {
+    return (mUsingSpdyVersion != SpdyVersion::NONE) ||
+           (mKeepAliveMask && mKeepAlive);
+  }
+
+  // Returns time in seconds for how long connection can be reused.
+  uint32_t TimeToLive();
+
+  bool NeedSpdyTunnel() {
+    return mConnInfo->UsingHttpsProxy() && !mHasTLSTransportLayer &&
+           mConnInfo->UsingConnect();
+  }
+
+  // A connection is forced into plaintext when it is intended to be used as a
+  // CONNECT tunnel but the setup fails. The plaintext only carries the CONNECT
+  // error.
+  void ForcePlainText() { mForcePlainText = true; }
+
+  bool IsUrgentStartPreferred() const {
+    return mUrgentStartPreferredKnown && mUrgentStartPreferred;
+  }
+  void SetUrgentStartPreferred(bool urgent);
+
+  void SetIsReusedAfter(uint32_t afterMilliseconds);
+
+  int64_t MaxBytesRead() { return mMaxBytesRead; }
+  HttpVersion GetLastHttpResponseVersion() { return mLastHttpResponseVersion; }
+
+  friend class HttpConnectionForceIO;
+  friend class TlsHandshaker;
+
+  // When a persistent connection is in the connection manager idle
+  // connection pool, the nsHttpConnection still reads errors and hangups
+  // on the socket so that it can be proactively released if the server
+  // initiates a termination. Only call on socket thread.
+  void BeginIdleMonitoring();
+  void EndIdleMonitoring();
+
+  bool UsingSpdy() override { return (mUsingSpdyVersion != SpdyVersion::NONE); }
+  SpdyVersion GetSpdyVersion() { return mUsingSpdyVersion; }
+  bool EverUsedSpdy() { return mEverUsedSpdy; }
+  bool UsingHttp3() override { return false; }
+
+  // true when connection SSL NPN phase is complete and we know
+  // authoritatively whether UsingSpdy() or not.
+  bool ReportedNPN() { return mReportedSpdy; }
+
+  // When the connection is active this is called up to once every 1 second
+  // return the interval (in seconds) that the connection next wants to
+  // have this invoked. It might happen sooner depending on the needs of
+  // other connections.
+  uint32_t ReadTimeoutTick(PRIntervalTime now);
+
+  // For Active and Idle connections, this will be called when
+  // mTCPKeepaliveTransitionTimer fires, to check if the TCP keepalive config
+  // should move from short-lived (fast-detect) to long-lived.
+  static void UpdateTCPKeepalive(nsITimer* aTimer, void* aClosure);
+
+  // When the connection is active this is called every second
+  void ReadTimeoutTick();
+
+  int64_t ContentBytesWritten() { return mContentBytesWritten; }
+
+  void SetupSecondaryTLS();
+  void SetInSpdyTunnel();
+
+  // Check active connections for traffic (or not). SPDY connections send a
+  // ping, ordinary HTTP connections get some time to get traffic to be
+  // considered alive.
+  void CheckForTraffic(bool check);
+
+  // NoTraffic() returns true if there's been no traffic on the (non-spdy)
+  // connection since CheckForTraffic() was called.
+  bool NoTraffic() {
+    return mTrafficStamp &&
+           (mTrafficCount == (mTotalBytesWritten + mTotalBytesRead));
+  }
+
+  // Return true when the socket this connection is using has not been
+  // authenticated using a client certificate.  Before SSL negotiation
+  // has finished this returns false.
+  bool NoClientCertAuth() const override;
+
+  WebSocketSupport GetWebSocketSupport() override;
+
+  int64_t BytesWritten() override { return mTotalBytesWritten; }
+
+  nsISocketTransport* Transport() override { return mSocketTransport; }
+
+  nsresult GetSelfAddr(NetAddr* addr) override;
+  nsresult GetPeerAddr(NetAddr* addr) override;
+  bool ResolvedByTRR() override;
+  bool GetEchConfigUsed() override;
+
+  bool IsForWebSocket() { return mForWebSocket; }
+
+  // The following functions are related to setting up a tunnel.
+  [[nodiscard]] static nsresult MakeConnectString(
+      nsAHttpTransaction* trans, nsHttpRequestHead* request, nsACString& result,
+      bool h2ws, bool aShouldResistFingerprinting);
+  [[nodiscard]] static nsresult ReadFromStream(nsIInputStream*, void*,
+                                               const char*, uint32_t, uint32_t,
+                                               uint32_t*);
+
+  nsresult CreateTunnelStream(nsAHttpTransaction* httpTransaction,
+                              nsHttpConnection** aHttpConnection,
+                              bool aIsWebSocket = false);
+
+  bool RequestDone() { return mRequestDone; }
+
+ private:
+  enum HttpConnectionState {
+    UNINITIALIZED,
+    SETTING_UP_TUNNEL,
+    REQUEST,
+  } mState{HttpConnectionState::UNINITIALIZED};
+  void ChangeState(HttpConnectionState newState);
+
+  // Tunnel retated functions:
+  bool TunnelSetupInProgress() { return mState == SETTING_UP_TUNNEL; }
+  void SetTunnelSetupDone();
+  nsresult CheckTunnelIsNeeded();
+  nsresult SetupProxyConnectStream();
+  nsresult SendConnectRequest(void* closure, uint32_t* transactionBytes);
+
+  void HandleTunnelResponse(uint16_t responseStatus, bool* reset);
+  void HandleWebSocketResponse(nsHttpRequestHead* requestHead,
+                               nsHttpResponseHead* responseHead,
+                               uint16_t responseStatus);
+  void ResetTransaction(RefPtr<nsAHttpTransaction>&& trans);
+
+  // Value (set in mTCPKeepaliveConfig) indicates which set of prefs to use.
+  enum TCPKeepaliveConfig {
+    kTCPKeepaliveDisabled = 0,
+    kTCPKeepaliveShortLivedConfig,
+    kTCPKeepaliveLongLivedConfig
+  };
+
+  [[nodiscard]] nsresult OnTransactionDone(nsresult reason);
+  [[nodiscard]] nsresult OnSocketWritable();
+  [[nodiscard]] nsresult OnSocketReadable();
+
+  PRIntervalTime IdleTime();
+  bool IsAlive();
+
+  // Start the Spdy transaction handler when NPN indicates spdy/*
+  void StartSpdy(nsITLSSocketControl* ssl, SpdyVersion spdyVersion);
+  // Like the above, but do the bare minimum to do 0RTT data, so we can back
+  // it out, if necessary
+  void Start0RTTSpdy(SpdyVersion spdyVersion);
+
+  // Helpers for Start*Spdy
+  nsresult TryTakeSubTransactions(nsTArray<RefPtr<nsAHttpTransaction> >& list);
+  nsresult MoveTransactionsToSpdy(nsresult status,
+                                  nsTArray<RefPtr<nsAHttpTransaction> >& list);
+
+  // Directly Add a transaction to an active connection for SPDY
+  [[nodiscard]] nsresult AddTransaction(nsAHttpTransaction*, int32_t);
+
+  // Used to set TCP keepalives for fast detection of dead connections during
+  // an initial period, and slower detection for long-lived connections.
+  [[nodiscard]] nsresult StartShortLivedTCPKeepalives();
+  [[nodiscard]] nsresult StartLongLivedTCPKeepalives();
+  [[nodiscard]] nsresult DisableTCPKeepalives();
+
+  bool CheckCanWrite0RTTData();
+  void PostProcessNPNSetup(bool handshakeSucceeded, bool hasSecurityInfo,
+                           bool earlyDataUsed);
+  void Reset0RttForSpdy();
+  void HandshakeDoneInternal();
+  uint32_t TransactionCaps() const { return mTransactionCaps; }
+
+  void MarkAsDontReuse();
+
+ private:
+  // mTransaction only points to the HTTP Transaction callbacks if the
+  // transaction is open, otherwise it is null.
+  RefPtr<nsAHttpTransaction> mTransaction;
+
+  RefPtr<TlsHandshaker> mTlsHandshaker;
+
+  nsCOMPtr<nsIAsyncInputStream> mSocketIn;
+  nsCOMPtr<nsIAsyncOutputStream> mSocketOut;
+
+  nsresult mSocketInCondition{NS_ERROR_NOT_INITIALIZED};
+  nsresult mSocketOutCondition{NS_ERROR_NOT_INITIALIZED};
+
+  RefPtr<nsHttpHandler> mHttpHandler;  // keep gHttpHandler alive
+
+  PRIntervalTime mLastReadTime{0};
+  PRIntervalTime mLastWriteTime{0};
+  // max download time before dropping keep-alive status
+  PRIntervalTime mMaxHangTime{0};
+  PRIntervalTime mIdleTimeout;  // value of keep-alive: timeout=
+  PRIntervalTime mConsiderReusedAfterInterval{0};
+  PRIntervalTime mConsiderReusedAfterEpoch{0};
+  int64_t mCurrentBytesRead{0};     // data read per activation
+  int64_t mMaxBytesRead{0};         // max read in 1 activation
+  int64_t mTotalBytesRead{0};       // total data read
+  int64_t mContentBytesWritten{0};  // does not include CONNECT tunnel or TLS
+
+  RefPtr<nsIAsyncInputStream> mInputOverflow;
+
+  // Whether the first non-null transaction dispatched on this connection was
+  // urgent-start or not
+  bool mUrgentStartPreferred{false};
+  // A flag to prevent reset of mUrgentStartPreferred by subsequent transactions
+  bool mUrgentStartPreferredKnown{false};
+  bool mConnectedTransport{false};
+  // assume to keep-alive by default
+  bool mKeepAlive{true};
+  bool mKeepAliveMask{true};
+  bool mDontReuse{false};
+  bool mIsReused{false};
+  bool mLastTransactionExpectedNoContent{false};
+  bool mIdleMonitoring{false};
+  bool mInSpdyTunnel{false};
+  bool mForcePlainText{false};
+
+  // A snapshot of current number of transfered bytes
+  int64_t mTrafficCount{0};
+  bool mTrafficStamp{false};  // true then the above is set
+
+  // The number of <= HTTP/1.1 transactions performed on this connection. This
+  // excludes spdy transactions.
+  uint32_t mHttp1xTransactionCount{0};
+
+  // Keep-Alive: max="mRemainingConnectionUses" provides the number of future
+  // transactions (including the current one) that the server expects to allow
+  // on this persistent connection.
+  uint32_t mRemainingConnectionUses{0xffffffff};
+
+  // version level in use, 0 if unused
+  SpdyVersion mUsingSpdyVersion{SpdyVersion::NONE};
+
+  RefPtr<ASpdySession> mSpdySession;
+  RefPtr<ASpdySession> mWebSocketHttp2Session;
+  int32_t mPriority{nsISupportsPriority::PRIORITY_NORMAL};
+  bool mReportedSpdy{false};
+
+  // mUsingSpdyVersion is cleared when mSpdySession is freed, this is permanent
+  bool mEverUsedSpdy{false};
+
+  // mLastHttpResponseVersion stores the last response's http version seen.
+  HttpVersion mLastHttpResponseVersion{HttpVersion::v1_1};
+
+  // If a large keepalive has been requested for any trans,
+  // scale the default by this factor
+  uint32_t mDefaultTimeoutFactor{1};
+
+  bool mResponseTimeoutEnabled{false};
+
+  // Flag to indicate connection is in inital keepalive period (fast detect).
+  uint32_t mTCPKeepaliveConfig{kTCPKeepaliveDisabled};
+  nsCOMPtr<nsITimer> mTCPKeepaliveTransitionTimer;
+
+ private:
+  // For ForceSend()
+  static void ForceSendIO(nsITimer* aTimer, void* aClosure);
+  [[nodiscard]] nsresult MaybeForceSendIO();
+  bool mForceSendPending{false};
+  nsCOMPtr<nsITimer> mForceSendTimer;
+
+  int64_t mContentBytesWritten0RTT{0};
+  bool mDid0RTTSpdy{false};
+
+  nsresult mErrorBeforeConnect = NS_OK;
+
+  nsCOMPtr<nsISocketTransport> mSocketTransport;
+
+  bool mForWebSocket{false};
+
+  std::function<void()> mContinueHandshakeDone{nullptr};
+
+ private:
+  bool mThroughCaptivePortal;
+  int64_t mTotalBytesWritten = 0;  // does not include CONNECT tunnel
+
+  nsCOMPtr<nsIInputStream> mProxyConnectStream;
+
+  bool mRequestDone{false};
+  bool mHasTLSTransportLayer{false};
+  bool mTransactionDisallowHttp3{false};
+};
+
+NS_DEFINE_STATIC_IID_ACCESSOR(nsHttpConnection, NS_HTTPCONNECTION_IID)
+
+}  // namespace net
+}  // namespace mozilla
+
+#endif  // nsHttpConnection_h__