mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
464 lines
19 KiB
C++
464 lines
19 KiB
C++
/* -*- Mode: C++; tab-width: 2; 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 mozilla_net_Http2Session_h
|
|
#define mozilla_net_Http2Session_h
|
|
|
|
// HTTP/2
|
|
|
|
#include "ASpdySession.h"
|
|
#include "mozilla/Attributes.h"
|
|
#include "nsAHttpConnection.h"
|
|
#include "nsClassHashtable.h"
|
|
#include "nsDataHashtable.h"
|
|
#include "nsDeque.h"
|
|
#include "nsHashKeys.h"
|
|
|
|
#include "Http2Compression.h"
|
|
|
|
class nsISocketTransport;
|
|
|
|
namespace mozilla {
|
|
namespace net {
|
|
|
|
class Http2PushedStream;
|
|
class Http2Stream;
|
|
class nsHttpTransaction;
|
|
|
|
class Http2Session MOZ_FINAL : public ASpdySession
|
|
, public nsAHttpConnection
|
|
, public nsAHttpSegmentReader
|
|
, public nsAHttpSegmentWriter
|
|
{
|
|
public:
|
|
NS_DECL_ISUPPORTS
|
|
NS_DECL_NSAHTTPTRANSACTION
|
|
NS_DECL_NSAHTTPCONNECTION(mConnection)
|
|
NS_DECL_NSAHTTPSEGMENTREADER
|
|
NS_DECL_NSAHTTPSEGMENTWRITER
|
|
|
|
Http2Session(nsISocketTransport *);
|
|
~Http2Session();
|
|
|
|
bool AddStream(nsAHttpTransaction *, int32_t,
|
|
bool, nsIInterfaceRequestor *);
|
|
bool CanReuse() { return !mShouldGoAway && !mClosed; }
|
|
bool RoomForMoreStreams();
|
|
|
|
// 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);
|
|
|
|
// Idle time represents time since "goodput".. e.g. a data or header frame
|
|
PRIntervalTime IdleTime();
|
|
|
|
// Registering with a newID of 0 means pick the next available odd ID
|
|
uint32_t RegisterStreamID(Http2Stream *, uint32_t aNewID = 0);
|
|
|
|
/*
|
|
HTTP/2 framing
|
|
|
|
0 1 2 3
|
|
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
| Length (16) | Type (8) | Flags (8) |
|
|
+-+-------------+---------------+-------------------------------+
|
|
|R| Stream Identifier (31) |
|
|
+-+-------------------------------------------------------------+
|
|
| Frame Data (0...) ...
|
|
+---------------------------------------------------------------+
|
|
*/
|
|
|
|
enum frameType {
|
|
FRAME_TYPE_DATA = 0,
|
|
FRAME_TYPE_HEADERS = 1,
|
|
FRAME_TYPE_PRIORITY = 2,
|
|
FRAME_TYPE_RST_STREAM = 3,
|
|
FRAME_TYPE_SETTINGS = 4,
|
|
FRAME_TYPE_PUSH_PROMISE = 5,
|
|
FRAME_TYPE_PING = 6,
|
|
FRAME_TYPE_GOAWAY = 7,
|
|
FRAME_TYPE_WINDOW_UPDATE = 8,
|
|
FRAME_TYPE_CONTINUATION = 9,
|
|
FRAME_TYPE_ALTSVC = 10,
|
|
FRAME_TYPE_BLOCKED = 11,
|
|
FRAME_TYPE_LAST = 12
|
|
};
|
|
|
|
// NO_ERROR is a macro defined on windows, so we'll name the HTTP2 goaway
|
|
// code NO_ERROR to be NO_HTTP_ERROR
|
|
enum errorType {
|
|
NO_HTTP_ERROR = 0,
|
|
PROTOCOL_ERROR = 1,
|
|
INTERNAL_ERROR = 2,
|
|
FLOW_CONTROL_ERROR = 3,
|
|
SETTINGS_TIMEOUT_ERROR = 4,
|
|
STREAM_CLOSED_ERROR = 5,
|
|
FRAME_SIZE_ERROR = 6,
|
|
REFUSED_STREAM_ERROR = 7,
|
|
CANCEL_ERROR = 8,
|
|
COMPRESSION_ERROR = 9,
|
|
CONNECT_ERROR = 10,
|
|
ENHANCE_YOUR_CALM = 11,
|
|
INADEQUATE_SECURITY = 12
|
|
};
|
|
|
|
// These are frame flags. If they, or other undefined flags, are
|
|
// used on frames other than the comments indicate they MUST be ignored.
|
|
const static uint8_t kFlag_END_STREAM = 0x01; // data, headers
|
|
const static uint8_t kFlag_END_HEADERS = 0x04; // headers, continuation
|
|
const static uint8_t kFlag_END_PUSH_PROMISE = 0x04; // push promise
|
|
const static uint8_t kFlag_ACK = 0x01; // ping and settings
|
|
const static uint8_t kFlag_END_SEGMENT = 0x02; // data
|
|
const static uint8_t kFlag_PAD_LOW = 0x08; // data, headers, push promise, continuation
|
|
const static uint8_t kFlag_PAD_HIGH = 0x10; // data, headers, push promise, continuation
|
|
const static uint8_t kFlag_COMPRESSED = 0x20; // data
|
|
const static uint8_t kFlag_PRIORITY = 0x20; // headers
|
|
|
|
enum {
|
|
SETTINGS_TYPE_HEADER_TABLE_SIZE = 1, // compression table size
|
|
SETTINGS_TYPE_ENABLE_PUSH = 2, // can be used to disable push
|
|
SETTINGS_TYPE_MAX_CONCURRENT = 3, // streams recvr allowed to initiate
|
|
SETTINGS_TYPE_INITIAL_WINDOW = 4, // bytes for flow control default
|
|
SETTINGS_TYPE_COMPRESS_DATA = 5 // whether other side allowes compressed DATA
|
|
};
|
|
|
|
// This should be big enough to hold all of your control packets,
|
|
// but if it needs to grow for huge headers it can do so dynamically.
|
|
const static uint32_t kDefaultBufferSize = 2048;
|
|
|
|
// kDefaultQueueSize must be >= other queue size constants
|
|
const static uint32_t kDefaultQueueSize = 32768;
|
|
const static uint32_t kQueueMinimumCleanup = 24576;
|
|
const static uint32_t kQueueTailRoom = 4096;
|
|
const static uint32_t kQueueReserved = 1024;
|
|
|
|
const static uint32_t kDefaultMaxConcurrent = 100;
|
|
const static uint32_t kMaxStreamID = 0x7800000;
|
|
|
|
// This is a sentinel for a deleted stream. It is not a valid
|
|
// 31 bit stream ID.
|
|
const static uint32_t kDeadStreamID = 0xffffdead;
|
|
|
|
// below the emergency threshold of local window we ack every received
|
|
// byte. Above that we coalesce bytes into the MinimumToAck size.
|
|
const static int32_t kEmergencyWindowThreshold = 256 * 1024;
|
|
const static uint32_t kMinimumToAck = 4 * 1024 * 1024;
|
|
|
|
// The default rwin is 64KB - 1 unless updated by a settings frame
|
|
const static uint32_t kDefaultRwin = 65535;
|
|
|
|
// Frames with HTTP semantics are limited to 2^14 - 1 bytes of length in
|
|
// order to preserve responsiveness
|
|
const static uint32_t kMaxFrameData = 16383;
|
|
|
|
static nsresult RecvHeaders(Http2Session *);
|
|
static nsresult RecvPriority(Http2Session *);
|
|
static nsresult RecvRstStream(Http2Session *);
|
|
static nsresult RecvSettings(Http2Session *);
|
|
static nsresult RecvPushPromise(Http2Session *);
|
|
static nsresult RecvPing(Http2Session *);
|
|
static nsresult RecvGoAway(Http2Session *);
|
|
static nsresult RecvWindowUpdate(Http2Session *);
|
|
static nsresult RecvContinuation(Http2Session *);
|
|
static nsresult RecvAltSvc(Http2Session *);
|
|
static nsresult RecvBlocked(Http2Session *);
|
|
|
|
char *EnsureOutputBuffer(uint32_t needed);
|
|
|
|
template<typename charType>
|
|
void CreateFrameHeader(charType dest, uint16_t frameLength,
|
|
uint8_t frameType, uint8_t frameFlags,
|
|
uint32_t streamID);
|
|
|
|
// For writing the data stream to LOG4
|
|
static void LogIO(Http2Session *, Http2Stream *, const char *,
|
|
const char *, uint32_t);
|
|
|
|
// an overload of nsAHttpConnection
|
|
void TransactionHasDataToWrite(nsAHttpTransaction *);
|
|
|
|
// a similar version for Http2Stream
|
|
void TransactionHasDataToWrite(Http2Stream *);
|
|
|
|
// an overload of nsAHttpSegementReader
|
|
virtual nsresult CommitToSegmentSize(uint32_t size, bool forceCommitment);
|
|
nsresult BufferOutput(const char *, uint32_t, uint32_t *);
|
|
void FlushOutputQueue();
|
|
uint32_t AmountOfOutputBuffered() { return mOutputQueueUsed - mOutputQueueSent; }
|
|
|
|
uint32_t GetServerInitialStreamWindow() { return mServerInitialStreamWindow; }
|
|
|
|
void ConnectPushedStream(Http2Stream *stream);
|
|
void MaybeDecrementConcurrent(Http2Stream *stream);
|
|
|
|
nsresult ConfirmTLSProfile();
|
|
|
|
uint64_t Serial() { return mSerial; }
|
|
|
|
void PrintDiagnostics (nsCString &log);
|
|
|
|
// Streams need access to these
|
|
uint32_t SendingChunkSize() { return mSendingChunkSize; }
|
|
uint32_t PushAllowance() { return mPushAllowance; }
|
|
Http2Compressor *Compressor() { return &mCompressor; }
|
|
nsISocketTransport *SocketTransport() { return mSocketTransport; }
|
|
int64_t ServerSessionWindow() { return mServerSessionWindow; }
|
|
void DecrementServerSessionWindow (uint32_t bytes) { mServerSessionWindow -= bytes; }
|
|
|
|
private:
|
|
|
|
// These internal states do not correspond to the states of the HTTP/2 specification
|
|
enum internalStateType {
|
|
BUFFERING_OPENING_SETTINGS,
|
|
BUFFERING_FRAME_HEADER,
|
|
BUFFERING_CONTROL_FRAME,
|
|
PROCESSING_DATA_FRAME_PADDING_CONTROL,
|
|
PROCESSING_DATA_FRAME,
|
|
DISCARDING_DATA_FRAME_PADDING,
|
|
DISCARDING_DATA_FRAME,
|
|
PROCESSING_COMPLETE_HEADERS,
|
|
PROCESSING_CONTROL_RST_STREAM
|
|
};
|
|
|
|
static const uint8_t kMagicHello[24];
|
|
|
|
nsresult ResponseHeadersComplete();
|
|
uint32_t GetWriteQueueSize();
|
|
void ChangeDownstreamState(enum internalStateType);
|
|
void ResetDownstreamState();
|
|
nsresult ReadyToProcessDataFrame(enum internalStateType);
|
|
nsresult UncompressAndDiscard();
|
|
void GeneratePing(bool);
|
|
void GenerateSettingsAck();
|
|
void GeneratePriority(uint32_t, uint8_t);
|
|
void GenerateRstStream(uint32_t, uint32_t);
|
|
void GenerateGoAway(uint32_t);
|
|
void CleanupStream(Http2Stream *, nsresult, errorType);
|
|
void CloseStream(Http2Stream *, nsresult);
|
|
void SendHello();
|
|
void RemoveStreamFromQueues(Http2Stream *);
|
|
nsresult ParsePadding(uint8_t &, uint16_t &);
|
|
|
|
void SetWriteCallbacks();
|
|
void RealignOutputQueue();
|
|
|
|
bool RoomForMoreConcurrent();
|
|
void ActivateStream(Http2Stream *);
|
|
void ProcessPending();
|
|
nsresult SetInputFrameDataStream(uint32_t);
|
|
bool VerifyStream(Http2Stream *, uint32_t);
|
|
void SetNeedsCleanup();
|
|
|
|
void UpdateLocalRwin(Http2Stream *stream, uint32_t bytes);
|
|
void UpdateLocalStreamWindow(Http2Stream *stream, uint32_t bytes);
|
|
void UpdateLocalSessionWindow(uint32_t bytes);
|
|
|
|
// a wrapper for all calls to the nshttpconnection level segment writer. Used
|
|
// to track network I/O for timeout purposes
|
|
nsresult NetworkRead(nsAHttpSegmentWriter *, char *, uint32_t, uint32_t *);
|
|
|
|
static PLDHashOperator ShutdownEnumerator(nsAHttpTransaction *,
|
|
nsAutoPtr<Http2Stream> &,
|
|
void *);
|
|
|
|
static PLDHashOperator GoAwayEnumerator(nsAHttpTransaction *,
|
|
nsAutoPtr<Http2Stream> &,
|
|
void *);
|
|
|
|
static PLDHashOperator UpdateServerRwinEnumerator(nsAHttpTransaction *,
|
|
nsAutoPtr<Http2Stream> &,
|
|
void *);
|
|
|
|
static PLDHashOperator RestartBlockedOnRwinEnumerator(nsAHttpTransaction *,
|
|
nsAutoPtr<Http2Stream> &,
|
|
void *);
|
|
|
|
// This is intended to be nsHttpConnectionMgr:nsConnectionHandle taken
|
|
// from the first transaction on this session. That object contains the
|
|
// pointer to the real network-level nsHttpConnection object.
|
|
nsRefPtr<nsAHttpConnection> mConnection;
|
|
|
|
// The underlying socket transport object is needed to propogate some events
|
|
nsISocketTransport *mSocketTransport;
|
|
|
|
// These are temporary state variables to hold the argument to
|
|
// Read/WriteSegments so it can be accessed by On(read/write)segment
|
|
// further up the stack.
|
|
nsAHttpSegmentReader *mSegmentReader;
|
|
nsAHttpSegmentWriter *mSegmentWriter;
|
|
|
|
uint32_t mSendingChunkSize; /* the transmission chunk size */
|
|
uint32_t mNextStreamID; /* 24 bits */
|
|
uint32_t mConcurrentHighWater; /* max parallelism on session */
|
|
uint32_t mPushAllowance; /* rwin for unmatched pushes */
|
|
|
|
internalStateType mDownstreamState; /* in frame, between frames, etc.. */
|
|
|
|
// Maintain 2 indexes - one by stream ID, one by transaction pointer.
|
|
// There are also several lists of streams: ready to write, queued due to
|
|
// max parallelism, streams that need to force a read for push, and the full
|
|
// set of pushed streams.
|
|
// The objects are not ref counted - they get destroyed
|
|
// by the nsClassHashtable implementation when they are removed from
|
|
// the transaction hash.
|
|
nsDataHashtable<nsUint32HashKey, Http2Stream *> mStreamIDHash;
|
|
nsClassHashtable<nsPtrHashKey<nsAHttpTransaction>,
|
|
Http2Stream> mStreamTransactionHash;
|
|
|
|
nsDeque mReadyForWrite;
|
|
nsDeque mQueuedStreams;
|
|
nsDeque mReadyForRead;
|
|
nsTArray<Http2PushedStream *> mPushedStreams;
|
|
|
|
// Compression contexts for header transport.
|
|
// HTTP/2 compresses only HTTP headers and does not reset the context in between
|
|
// frames. Even data that is not associated with a stream (e.g invalid
|
|
// stream ID) is passed through these contexts to keep the compression
|
|
// context correct.
|
|
Http2Compressor mCompressor;
|
|
Http2Decompressor mDecompressor;
|
|
nsCString mDecompressBuffer;
|
|
|
|
// mInputFrameBuffer is used to store received control packets and the 8 bytes
|
|
// of header on data packets
|
|
uint32_t mInputFrameBufferSize; // buffer allocation
|
|
uint32_t mInputFrameBufferUsed; // amt of allocation used
|
|
nsAutoArrayPtr<char> mInputFrameBuffer;
|
|
|
|
// mInputFrameDataSize/Read are used for tracking the amount of data consumed
|
|
// in a frame after the 8 byte header. Control frames are always fully buffered
|
|
// and the fixed 8 byte leading header is at mInputFrameBuffer + 0, the first
|
|
// data byte (i.e. the first settings/goaway/etc.. specific byte) is at
|
|
// mInputFrameBuffer + 8
|
|
// The frame size is mInputFrameDataSize + the constant 8 byte header
|
|
uint32_t mInputFrameDataSize;
|
|
uint32_t mInputFrameDataRead;
|
|
bool mInputFrameFinal; // This frame was marked FIN
|
|
uint8_t mInputFrameType;
|
|
uint8_t mInputFrameFlags;
|
|
uint32_t mInputFrameID;
|
|
uint16_t mPaddingLength;
|
|
|
|
// When a frame has been received that is addressed to a particular stream
|
|
// (e.g. a data frame after the stream-id has been decoded), this points
|
|
// to the stream.
|
|
Http2Stream *mInputFrameDataStream;
|
|
|
|
// mNeedsCleanup is a state variable to defer cleanup of a closed stream
|
|
// If needed, It is set in session::OnWriteSegments() and acted on and
|
|
// cleared when the stack returns to session::WriteSegments(). The stream
|
|
// cannot be destroyed directly out of OnWriteSegments because
|
|
// stream::writeSegments() is on the stack at that time.
|
|
Http2Stream *mNeedsCleanup;
|
|
|
|
// This reason code in the last processed RESET frame
|
|
uint32_t mDownstreamRstReason;
|
|
|
|
// When HEADERS/PROMISE are chained together, this is the expected ID of the next
|
|
// recvd frame which must be the same type
|
|
uint32_t mExpectedHeaderID;
|
|
uint32_t mExpectedPushPromiseID;
|
|
uint32_t mContinuedPromiseStream;
|
|
|
|
// for the conversion of downstream http headers into http/2 formatted headers
|
|
// The data here does not persist between frames
|
|
nsCString mFlatHTTPResponseHeaders;
|
|
uint32_t mFlatHTTPResponseHeadersOut;
|
|
|
|
// when set, the session will go away when it reaches 0 streams. This flag
|
|
// is set when: the stream IDs are running out (at either the client or the
|
|
// server), when DontReuse() is called, a RST that is not specific to a
|
|
// particular stream is received, a GOAWAY frame has been received from
|
|
// the server.
|
|
bool mShouldGoAway;
|
|
|
|
// the session has received a nsAHttpTransaction::Close() call
|
|
bool mClosed;
|
|
|
|
// the session received a GoAway frame with a valid GoAwayID
|
|
bool mCleanShutdown;
|
|
|
|
// The TLS comlpiance checks are not done in the ctor beacuse of bad
|
|
// exception handling - so we do them at IO time and cache the result
|
|
bool mTLSProfileConfirmed;
|
|
|
|
// A specifc reason code for the eventual GoAway frame. If set to NO_HTTP_ERROR
|
|
// only NO_HTTP_ERROR, PROTOCOL_ERROR, or INTERNAL_ERROR will be sent.
|
|
errorType mGoAwayReason;
|
|
|
|
// If a GoAway message was received this is the ID of the last valid
|
|
// stream. 0 otherwise. (0 is never a valid stream id.)
|
|
uint32_t mGoAwayID;
|
|
|
|
// The last stream processed ID we will send in our GoAway frame.
|
|
uint32_t mOutgoingGoAwayID;
|
|
|
|
// The limit on number of concurrent streams for this session. Normally it
|
|
// is basically unlimited, but the SETTINGS control message from the
|
|
// server might bring it down.
|
|
uint32_t mMaxConcurrent;
|
|
|
|
// The actual number of concurrent streams at this moment. Generally below
|
|
// mMaxConcurrent, but the max can be lowered in real time to a value
|
|
// below the current value
|
|
uint32_t mConcurrent;
|
|
|
|
// The number of server initiated promises, tracked for telemetry
|
|
uint32_t mServerPushedResources;
|
|
|
|
// The server rwin for new streams as determined from a SETTINGS frame
|
|
uint32_t mServerInitialStreamWindow;
|
|
|
|
// The Local Session window is how much data the server is allowed to send
|
|
// (across all streams) without getting a window update to stream 0. It is
|
|
// signed because asynchronous changes via SETTINGS can drive it negative.
|
|
int64_t mLocalSessionWindow;
|
|
|
|
// The Remote Session Window is how much data the client is allowed to send
|
|
// (across all streams) without receiving a window update to stream 0. It is
|
|
// signed because asynchronous changes via SETTINGS can drive it negative.
|
|
int64_t mServerSessionWindow;
|
|
|
|
// This is a output queue of bytes ready to be written to the SSL stream.
|
|
// When that streams returns WOULD_BLOCK on direct write the bytes get
|
|
// coalesced together here. This results in larger writes to the SSL layer.
|
|
// The buffer is not dynamically grown to accomodate stream writes, but
|
|
// does expand to accept infallible session wide frames like GoAway and RST.
|
|
uint32_t mOutputQueueSize;
|
|
uint32_t mOutputQueueUsed;
|
|
uint32_t mOutputQueueSent;
|
|
nsAutoArrayPtr<char> mOutputQueueBuffer;
|
|
|
|
PRIntervalTime mPingThreshold;
|
|
PRIntervalTime mLastReadEpoch; // used for ping timeouts
|
|
PRIntervalTime mLastDataReadEpoch; // used for IdleTime()
|
|
PRIntervalTime mPingSentEpoch;
|
|
|
|
// used as a temporary buffer while enumerating the stream hash during GoAway
|
|
nsDeque mGoAwayStreamsToRestart;
|
|
|
|
// Each session gets a unique serial number because the push cache is correlated
|
|
// by the load group and the serial number can be used as part of the cache key
|
|
// to make sure streams aren't shared across sessions.
|
|
uint64_t mSerial;
|
|
|
|
private:
|
|
/// connect tunnels
|
|
void DispatchOnTunnel(nsAHttpTransaction *, nsIInterfaceRequestor *);
|
|
void RegisterTunnel(Http2Stream *);
|
|
void UnRegisterTunnel(Http2Stream *);
|
|
uint32_t FindTunnelCount(nsHttpConnectionInfo *);
|
|
|
|
nsDataHashtable<nsCStringHashKey, uint32_t> mTunnelHash;
|
|
};
|
|
|
|
} // namespace mozilla::net
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_net_Http2Session_h
|