Mirror of roytam1's UXP fork just in case Moonchild and Tobin decide to go after him
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 
 

4024 lines
132 KiB

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set sw=2 ts=8 et tw=80 : */
/* 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 "Http2Session.h"
#include "Http2Stream.h"
#include "Http2Push.h"
#include "mozilla/EndianUtils.h"
#include "mozilla/Telemetry.h"
#include "mozilla/Preferences.h"
#include "nsHttp.h"
#include "nsHttpHandler.h"
#include "nsHttpConnection.h"
#include "nsIRequestContext.h"
#include "nsISSLSocketControl.h"
#include "nsISSLStatus.h"
#include "nsISSLStatusProvider.h"
#include "nsISupportsPriority.h"
#include "nsStandardURL.h"
#include "nsURLHelper.h"
#include "prnetdb.h"
#include "sslt.h"
#include "mozilla/Sprintf.h"
#include "nsSocketTransportService2.h"
#include "nsNetUtil.h"
namespace mozilla {
namespace net {
// Http2Session has multiple inheritance of things that implement
// nsISupports, so this magic is taken from nsHttpPipeline that
// implements some of the same abstract classes.
NS_IMPL_ADDREF(Http2Session)
NS_IMPL_RELEASE(Http2Session)
NS_INTERFACE_MAP_BEGIN(Http2Session)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsAHttpConnection)
NS_INTERFACE_MAP_END
// "magic" refers to the string that preceeds HTTP/2 on the wire
// to help find any intermediaries speaking an older version of HTTP
const uint8_t Http2Session::kMagicHello[] = {
0x50, 0x52, 0x49, 0x20, 0x2a, 0x20, 0x48, 0x54,
0x54, 0x50, 0x2f, 0x32, 0x2e, 0x30, 0x0d, 0x0a,
0x0d, 0x0a, 0x53, 0x4d, 0x0d, 0x0a, 0x0d, 0x0a
};
#define RETURN_SESSION_ERROR(o,x) \
do { \
(o)->mGoAwayReason = (x); \
return NS_ERROR_ILLEGAL_VALUE; \
} while (0)
Http2Session::Http2Session(nsISocketTransport *aSocketTransport, uint32_t version, bool attemptingEarlyData)
: mSocketTransport(aSocketTransport)
, mSegmentReader(nullptr)
, mSegmentWriter(nullptr)
, mNextStreamID(3) // 1 is reserved for Updgrade handshakes
, mLastPushedID(0)
, mConcurrentHighWater(0)
, mDownstreamState(BUFFERING_OPENING_SETTINGS)
, mInputFrameBufferSize(kDefaultBufferSize)
, mInputFrameBufferUsed(0)
, mInputFrameDataSize(0)
, mInputFrameDataRead(0)
, mInputFrameFinal(false)
, mInputFrameType(0)
, mInputFrameFlags(0)
, mInputFrameID(0)
, mPaddingLength(0)
, mInputFrameDataStream(nullptr)
, mNeedsCleanup(nullptr)
, mDownstreamRstReason(NO_HTTP_ERROR)
, mExpectedHeaderID(0)
, mExpectedPushPromiseID(0)
, mContinuedPromiseStream(0)
, mFlatHTTPResponseHeadersOut(0)
, mShouldGoAway(false)
, mClosed(false)
, mCleanShutdown(false)
, mTLSProfileConfirmed(false)
, mGoAwayReason(NO_HTTP_ERROR)
, mClientGoAwayReason(UNASSIGNED)
, mPeerGoAwayReason(UNASSIGNED)
, mGoAwayID(0)
, mOutgoingGoAwayID(0)
, mConcurrent(0)
, mServerPushedResources(0)
, mServerInitialStreamWindow(kDefaultRwin)
, mLocalSessionWindow(kDefaultRwin)
, mServerSessionWindow(kDefaultRwin)
, mInitialRwin(ASpdySession::kInitialRwin)
, mOutputQueueSize(kDefaultQueueSize)
, mOutputQueueUsed(0)
, mOutputQueueSent(0)
, mLastReadEpoch(PR_IntervalNow())
, mPingSentEpoch(0)
, mPreviousUsed(false)
, mWaitingForSettingsAck(false)
, mGoAwayOnPush(false)
, mUseH2Deps(false)
, mAttemptingEarlyData(attemptingEarlyData)
{
MOZ_ASSERT(PR_GetCurrentThread() == gSocketThread);
static uint64_t sSerial;
mSerial = ++sSerial;
LOG3(("Http2Session::Http2Session %p serial=0x%X\n", this, mSerial));
mInputFrameBuffer = MakeUnique<char[]>(mInputFrameBufferSize);
mOutputQueueBuffer = MakeUnique<char[]>(mOutputQueueSize);
mDecompressBuffer.SetCapacity(kDefaultBufferSize);
mPushAllowance = gHttpHandler->SpdyPushAllowance();
mInitialRwin = std::max(gHttpHandler->SpdyPullAllowance(), mPushAllowance);
mMaxConcurrent = gHttpHandler->DefaultSpdyConcurrent();
mSendingChunkSize = gHttpHandler->SpdySendingChunkSize();
SendHello();
mLastDataReadEpoch = mLastReadEpoch;
mPingThreshold = gHttpHandler->SpdyPingThreshold();
mPreviousPingThreshold = mPingThreshold;
}
void
Http2Session::Shutdown()
{
for (auto iter = mStreamTransactionHash.Iter(); !iter.Done(); iter.Next()) {
nsAutoPtr<Http2Stream> &stream = iter.Data();
// On a clean server hangup the server sets the GoAwayID to be the ID of
// the last transaction it processed. If the ID of stream in the
// local stream is greater than that it can safely be restarted because the
// server guarantees it was not partially processed. Streams that have not
// registered an ID haven't actually been sent yet so they can always be
// restarted.
if (mCleanShutdown &&
(stream->StreamID() > mGoAwayID || !stream->HasRegisteredID())) {
CloseStream(stream, NS_ERROR_NET_RESET); // can be restarted
} else if (stream->RecvdData()) {
CloseStream(stream, NS_ERROR_NET_PARTIAL_TRANSFER);
} else if (mGoAwayReason == INADEQUATE_SECURITY) {
CloseStream(stream, NS_ERROR_NET_INADEQUATE_SECURITY);
} else {
CloseStream(stream, NS_ERROR_ABORT);
}
}
}
Http2Session::~Http2Session()
{
LOG3(("Http2Session::~Http2Session %p mDownstreamState=%X",
this, mDownstreamState));
Shutdown();
}
void
Http2Session::LogIO(Http2Session *self, Http2Stream *stream,
const char *label,
const char *data, uint32_t datalen)
{
if (!LOG5_ENABLED())
return;
LOG5(("Http2Session::LogIO %p stream=%p id=0x%X [%s]",
self, stream, stream ? stream->StreamID() : 0, label));
// Max line is (16 * 3) + 10(prefix) + newline + null
char linebuf[128];
uint32_t index;
char *line = linebuf;
linebuf[127] = 0;
for (index = 0; index < datalen; ++index) {
if (!(index % 16)) {
if (index) {
*line = 0;
LOG5(("%s", linebuf));
}
line = linebuf;
snprintf(line, 128, "%08X: ", index);
line += 10;
}
snprintf(line, 128 - (line - linebuf), "%02X ", (reinterpret_cast<const uint8_t *>(data))[index]);
line += 3;
}
if (index) {
*line = 0;
LOG5(("%s", linebuf));
}
}
typedef nsresult (*Http2ControlFx) (Http2Session *self);
static Http2ControlFx sControlFunctions[] = {
nullptr, // type 0 data is not a control function
Http2Session::RecvHeaders,
Http2Session::RecvPriority,
Http2Session::RecvRstStream,
Http2Session::RecvSettings,
Http2Session::RecvPushPromise,
Http2Session::RecvPing,
Http2Session::RecvGoAway,
Http2Session::RecvWindowUpdate,
Http2Session::RecvContinuation,
Http2Session::RecvAltSvc // extension for type 0x0A
};
bool
Http2Session::RoomForMoreConcurrent()
{
MOZ_ASSERT(PR_GetCurrentThread() == gSocketThread);
return (mConcurrent < mMaxConcurrent);
}
bool
Http2Session::RoomForMoreStreams()
{
if (mNextStreamID + mStreamTransactionHash.Count() * 2 > kMaxStreamID)
return false;
return !mShouldGoAway;
}
PRIntervalTime
Http2Session::IdleTime()
{
return PR_IntervalNow() - mLastDataReadEpoch;
}
uint32_t
Http2Session::ReadTimeoutTick(PRIntervalTime now)
{
MOZ_ASSERT(PR_GetCurrentThread() == gSocketThread);
LOG3(("Http2Session::ReadTimeoutTick %p delta since last read %ds\n",
this, PR_IntervalToSeconds(now - mLastReadEpoch)));
if (!mPingThreshold)
return UINT32_MAX;
if ((now - mLastReadEpoch) < mPingThreshold) {
// recent activity means ping is not an issue
if (mPingSentEpoch) {
mPingSentEpoch = 0;
if (mPreviousUsed) {
// restore the former value
mPingThreshold = mPreviousPingThreshold;
mPreviousUsed = false;
}
}
return PR_IntervalToSeconds(mPingThreshold) -
PR_IntervalToSeconds(now - mLastReadEpoch);
}
if (mPingSentEpoch) {
LOG3(("Http2Session::ReadTimeoutTick %p handle outstanding ping\n"));
if ((now - mPingSentEpoch) >= gHttpHandler->SpdyPingTimeout()) {
LOG3(("Http2Session::ReadTimeoutTick %p Ping Timer Exhaustion\n", this));
mPingSentEpoch = 0;
Close(NS_ERROR_NET_TIMEOUT);
return UINT32_MAX;
}
return 1; // run the tick aggressively while ping is outstanding
}
LOG3(("Http2Session::ReadTimeoutTick %p generating ping\n", this));
mPingSentEpoch = PR_IntervalNow();
if (!mPingSentEpoch) {
mPingSentEpoch = 1; // avoid the 0 sentinel value
}
GeneratePing(false);
ResumeRecv(); // read the ping reply
// Check for orphaned push streams. This looks expensive, but generally the
// list is empty.
Http2PushedStream *deleteMe;
TimeStamp timestampNow;
do {
deleteMe = nullptr;
for (uint32_t index = mPushedStreams.Length();
index > 0 ; --index) {
Http2PushedStream *pushedStream = mPushedStreams[index - 1];
if (timestampNow.IsNull())
timestampNow = TimeStamp::Now(); // lazy initializer
// if stream finished, but is not connected, and its been like that for
// long then cleanup the stream.
if (pushedStream->IsOrphaned(timestampNow))
{
LOG3(("Http2Session Timeout Pushed Stream %p 0x%X\n",
this, pushedStream->StreamID()));
deleteMe = pushedStream;
break; // don't CleanupStream() while iterating this vector
}
}
if (deleteMe)
CleanupStream(deleteMe, NS_ERROR_ABORT, CANCEL_ERROR);
} while (deleteMe);
return 1; // run the tick aggressively while ping is outstanding
}
uint32_t
Http2Session::RegisterStreamID(Http2Stream *stream, uint32_t aNewID)
{
MOZ_ASSERT(PR_GetCurrentThread() == gSocketThread);
MOZ_ASSERT(mNextStreamID < 0xfffffff0,
"should have stopped admitting streams");
MOZ_ASSERT(!(aNewID & 1),
"0 for autoassign pull, otherwise explicit even push assignment");
if (!aNewID) {
// auto generate a new pull stream ID
aNewID = mNextStreamID;
MOZ_ASSERT(aNewID & 1, "pull ID must be odd.");
mNextStreamID += 2;
}
LOG3(("Http2Session::RegisterStreamID session=%p stream=%p id=0x%X "
"concurrent=%d",this, stream, aNewID, mConcurrent));
// We've used up plenty of ID's on this session. Start
// moving to a new one before there is a crunch involving
// server push streams or concurrent non-registered submits
if (aNewID >= kMaxStreamID)
mShouldGoAway = true;
// integrity check
if (mStreamIDHash.Get(aNewID)) {
LOG3((" New ID already present\n"));
MOZ_ASSERT(false, "New ID already present in mStreamIDHash");
mShouldGoAway = true;
return kDeadStreamID;
}
mStreamIDHash.Put(aNewID, stream);
return aNewID;
}
bool
Http2Session::AddStream(nsAHttpTransaction *aHttpTransaction,
int32_t aPriority,
bool aUseTunnel,
nsIInterfaceRequestor *aCallbacks)
{
MOZ_ASSERT(PR_GetCurrentThread() == gSocketThread);
// integrity check
if (mStreamTransactionHash.Get(aHttpTransaction)) {
LOG3((" New transaction already present\n"));
MOZ_ASSERT(false, "AddStream duplicate transaction pointer");
return false;
}
if (!mConnection) {
mConnection = aHttpTransaction->Connection();
}
if (mClosed || mShouldGoAway) {
nsHttpTransaction *trans = aHttpTransaction->QueryHttpTransaction();
if (trans) {
RefPtr<Http2PushedStreamWrapper> pushedStreamWrapper;
pushedStreamWrapper = trans->GetPushedStream();
if (!pushedStreamWrapper || !pushedStreamWrapper->GetStream()) {
LOG3(
("Http2Session::AddStream %p atrans=%p trans=%p session unusable - "
"resched.\n", this, aHttpTransaction, trans));
aHttpTransaction->SetConnection(nullptr);
nsresult rv =
gHttpHandler->InitiateTransaction(trans, trans->Priority());
if (NS_FAILED(rv)) {
LOG3(
("Http2Session::AddStream %p atrans=%p trans=%p failed to "
"initiate transaction (%08x).\n",
this, aHttpTransaction, trans, static_cast<uint32_t>(rv)));
}
return true;
}
}
}
aHttpTransaction->SetConnection(this);
if (aUseTunnel) {
LOG3(("Http2Session::AddStream session=%p trans=%p OnTunnel",
this, aHttpTransaction));
DispatchOnTunnel(aHttpTransaction, aCallbacks);
return true;
}
Http2Stream *stream = new Http2Stream(aHttpTransaction, this, aPriority);
LOG3(("Http2Session::AddStream session=%p stream=%p serial=%u "
"NextID=0x%X (tentative)", this, stream, mSerial, mNextStreamID));
mStreamTransactionHash.Put(aHttpTransaction, stream);
mReadyForWrite.Push(stream);
SetWriteCallbacks();
// Kick off the SYN transmit without waiting for the poll loop
// This won't work for the first stream because there is no segment reader
// yet.
if (mSegmentReader) {
uint32_t countRead;
ReadSegments(nullptr, kDefaultBufferSize, &countRead);
}
if (!(aHttpTransaction->Caps() & NS_HTTP_ALLOW_KEEPALIVE) &&
!aHttpTransaction->IsNullTransaction()) {
LOG3(("Http2Session::AddStream %p transaction %p forces keep-alive off.\n",
this, aHttpTransaction));
DontReuse();
}
return true;
}
void
Http2Session::QueueStream(Http2Stream *stream)
{
// will be removed via processpending or a shutdown path
MOZ_ASSERT(PR_GetCurrentThread() == gSocketThread);
MOZ_ASSERT(!stream->CountAsActive());
MOZ_ASSERT(!stream->Queued());
LOG3(("Http2Session::QueueStream %p stream %p queued.", this, stream));
#ifdef DEBUG
int32_t qsize = mQueuedStreams.GetSize();
for (int32_t i = 0; i < qsize; i++) {
Http2Stream *qStream = static_cast<Http2Stream *>(mQueuedStreams.ObjectAt(i));
MOZ_ASSERT(qStream != stream);
MOZ_ASSERT(qStream->Queued());
}
#endif
stream->SetQueued(true);
mQueuedStreams.Push(stream);
}
void
Http2Session::ProcessPending()
{
MOZ_ASSERT(PR_GetCurrentThread() == gSocketThread);
Http2Stream*stream;
while (RoomForMoreConcurrent() &&
(stream = static_cast<Http2Stream *>(mQueuedStreams.PopFront()))) {
LOG3(("Http2Session::ProcessPending %p stream %p woken from queue.",
this, stream));
MOZ_ASSERT(!stream->CountAsActive());
MOZ_ASSERT(stream->Queued());
stream->SetQueued(false);
mReadyForWrite.Push(stream);
SetWriteCallbacks();
}
}
nsresult
Http2Session::NetworkRead(nsAHttpSegmentWriter *writer, char *buf,
uint32_t count, uint32_t *countWritten)
{
MOZ_ASSERT(PR_GetCurrentThread() == gSocketThread);
if (!count) {
*countWritten = 0;
return NS_OK;
}
nsresult rv = writer->OnWriteSegment(buf, count, countWritten);
if (NS_SUCCEEDED(rv) && *countWritten > 0)
mLastReadEpoch = PR_IntervalNow();
return rv;
}
void
Http2Session::SetWriteCallbacks()
{
if (mConnection && (GetWriteQueueSize() || mOutputQueueUsed))
mConnection->ResumeSend();
}
void
Http2Session::RealignOutputQueue()
{
if (mAttemptingEarlyData) {
// We can't realign right now, because we may need what's in there if early
// data fails.
return;
}
mOutputQueueUsed -= mOutputQueueSent;
memmove(mOutputQueueBuffer.get(),
mOutputQueueBuffer.get() + mOutputQueueSent,
mOutputQueueUsed);
mOutputQueueSent = 0;
}
void
Http2Session::FlushOutputQueue()
{
if (!mSegmentReader || !mOutputQueueUsed)
return;
nsresult rv;
uint32_t countRead;
uint32_t avail = mOutputQueueUsed - mOutputQueueSent;
if (!avail && mAttemptingEarlyData) {
// This is kind of a hack, but there are cases where we'll have already
// written the data we want whlie doing early data, but we get called again
// with a reader, and we need to avoid calling the reader when there's
// nothing for it to read.
return;
}
rv = mSegmentReader->
OnReadSegment(mOutputQueueBuffer.get() + mOutputQueueSent, avail,
&countRead);
LOG3(("Http2Session::FlushOutputQueue %p sz=%d rv=%x actual=%d",
this, avail, rv, countRead));
// Dont worry about errors on write, we will pick this up as a read error too
if (NS_FAILED(rv))
return;
mOutputQueueSent += countRead;
if (mAttemptingEarlyData) {
return;
}
if (countRead == avail) {
mOutputQueueUsed = 0;
mOutputQueueSent = 0;
return;
}
// If the output queue is close to filling up and we have sent out a good
// chunk of data from the beginning then realign it.
if ((mOutputQueueSent >= kQueueMinimumCleanup) &&
((mOutputQueueSize - mOutputQueueUsed) < kQueueTailRoom)) {
RealignOutputQueue();
}
}
void
Http2Session::DontReuse()
{
LOG3(("Http2Session::DontReuse %p\n", this));
mShouldGoAway = true;
if (!mStreamTransactionHash.Count())
Close(NS_OK);
}
uint32_t
Http2Session::SpdyVersion()
{
return HTTP_VERSION_2;
}
uint32_t
Http2Session::GetWriteQueueSize()
{
MOZ_ASSERT(PR_GetCurrentThread() == gSocketThread);
return mReadyForWrite.GetSize();
}
void
Http2Session::ChangeDownstreamState(enum internalStateType newState)
{
MOZ_ASSERT(PR_GetCurrentThread() == gSocketThread);
LOG3(("Http2Session::ChangeDownstreamState() %p from %X to %X",
this, mDownstreamState, newState));
mDownstreamState = newState;
}
void
Http2Session::ResetDownstreamState()
{
MOZ_ASSERT(PR_GetCurrentThread() == gSocketThread);
LOG3(("Http2Session::ResetDownstreamState() %p", this));
ChangeDownstreamState(BUFFERING_FRAME_HEADER);
if (mInputFrameFinal && mInputFrameDataStream) {
mInputFrameFinal = false;
LOG3((" SetRecvdFin id=0x%x\n", mInputFrameDataStream->StreamID()));
mInputFrameDataStream->SetRecvdFin(true);
MaybeDecrementConcurrent(mInputFrameDataStream);
}
mInputFrameFinal = false;
mInputFrameBufferUsed = 0;
mInputFrameDataStream = nullptr;
}
// return true if activated (and counted against max)
// otherwise return false and queue
bool
Http2Session::TryToActivate(Http2Stream *aStream)
{
if (aStream->Queued()) {
LOG3(("Http2Session::TryToActivate %p stream=%p already queued.\n", this, aStream));
return false;
}
if (!RoomForMoreConcurrent()) {
LOG3(("Http2Session::TryToActivate %p stream=%p no room for more concurrent "
"streams %d\n", this, aStream));
QueueStream(aStream);
return false;
}
LOG3(("Http2Session::TryToActivate %p stream=%p\n", this, aStream));
IncrementConcurrent(aStream);
return true;
}
void
Http2Session::IncrementConcurrent(Http2Stream *stream)
{
MOZ_ASSERT(PR_GetCurrentThread() == gSocketThread);
MOZ_ASSERT(!stream->StreamID() || (stream->StreamID() & 1),
"Do not activate pushed streams");
nsAHttpTransaction *trans = stream->Transaction();
if (!trans || !trans->IsNullTransaction() || trans->QuerySpdyConnectTransaction()) {
MOZ_ASSERT(!stream->CountAsActive());
stream->SetCountAsActive(true);
++mConcurrent;
if (mConcurrent > mConcurrentHighWater) {
mConcurrentHighWater = mConcurrent;
}
LOG3(("Http2Session::IncrementCounter %p counting stream %p Currently %d "
"streams in session, high water mark is %d\n",
this, stream, mConcurrent, mConcurrentHighWater));
}
}
// call with data length (i.e. 0 for 0 data bytes - ignore 9 byte header)
// dest must have 9 bytes of allocated space
template<typename charType> void
Http2Session::CreateFrameHeader(charType dest, uint16_t frameLength,
uint8_t frameType, uint8_t frameFlags,
uint32_t streamID)
{
MOZ_ASSERT(frameLength <= kMaxFrameData, "framelength too large");
MOZ_ASSERT(!(streamID & 0x80000000));
MOZ_ASSERT(!frameFlags ||
(frameType != FRAME_TYPE_PRIORITY &&
frameType != FRAME_TYPE_RST_STREAM &&
frameType != FRAME_TYPE_GOAWAY &&
frameType != FRAME_TYPE_WINDOW_UPDATE));
dest[0] = 0x00;
NetworkEndian::writeUint16(dest + 1, frameLength);
dest[3] = frameType;
dest[4] = frameFlags;
NetworkEndian::writeUint32(dest + 5, streamID);
}
char *
Http2Session::EnsureOutputBuffer(uint32_t spaceNeeded)
{
// this is an infallible allocation (if an allocation is
// needed, which is probably isn't)
EnsureBuffer(mOutputQueueBuffer, mOutputQueueUsed + spaceNeeded,
mOutputQueueUsed, mOutputQueueSize);
return mOutputQueueBuffer.get() + mOutputQueueUsed;
}
template void
Http2Session::CreateFrameHeader(char *dest, uint16_t frameLength,
uint8_t frameType, uint8_t frameFlags,
uint32_t streamID);
template void
Http2Session::CreateFrameHeader(uint8_t *dest, uint16_t frameLength,
uint8_t frameType, uint8_t frameFlags,
uint32_t streamID);
void
Http2Session::MaybeDecrementConcurrent(Http2Stream *aStream)
{
MOZ_ASSERT(PR_GetCurrentThread() == gSocketThread);
LOG3(("MaybeDecrementConcurrent %p id=0x%X concurrent=%d active=%d\n",
this, aStream->StreamID(), mConcurrent, aStream->CountAsActive()));
if (!aStream->CountAsActive())
return;
MOZ_ASSERT(mConcurrent);
aStream->SetCountAsActive(false);
--mConcurrent;
ProcessPending();
}
// Need to decompress some data in order to keep the compression
// context correct, but we really don't care what the result is
nsresult
Http2Session::UncompressAndDiscard(bool isPush)
{
nsresult rv;
nsAutoCString trash;
rv = mDecompressor.DecodeHeaderBlock(reinterpret_cast<const uint8_t *>(mDecompressBuffer.BeginReading()),
mDecompressBuffer.Length(), trash, isPush);
mDecompressBuffer.Truncate();
if (NS_FAILED(rv)) {
LOG3(("Http2Session::UncompressAndDiscard %p Compression Error\n",
this));
mGoAwayReason = COMPRESSION_ERROR;
return rv;
}
return NS_OK;
}
void
Http2Session::GeneratePing(bool isAck)
{
MOZ_ASSERT(PR_GetCurrentThread() == gSocketThread);
LOG3(("Http2Session::GeneratePing %p isAck=%d\n", this, isAck));
char *packet = EnsureOutputBuffer(kFrameHeaderBytes + 8);
mOutputQueueUsed += kFrameHeaderBytes + 8;
if (isAck) {
CreateFrameHeader(packet, 8, FRAME_TYPE_PING, kFlag_ACK, 0);
memcpy(packet + kFrameHeaderBytes,
mInputFrameBuffer.get() + kFrameHeaderBytes, 8);
} else {
CreateFrameHeader(packet, 8, FRAME_TYPE_PING, 0, 0);
memset(packet + kFrameHeaderBytes, 0, 8);
}
LogIO(this, nullptr, "Generate Ping", packet, kFrameHeaderBytes + 8);
FlushOutputQueue();
}
void
Http2Session::GenerateSettingsAck()
{
// need to generate ack of this settings frame
MOZ_ASSERT(PR_GetCurrentThread() == gSocketThread);
LOG3(("Http2Session::GenerateSettingsAck %p\n", this));
char *packet = EnsureOutputBuffer(kFrameHeaderBytes);
mOutputQueueUsed += kFrameHeaderBytes;
CreateFrameHeader(packet, 0, FRAME_TYPE_SETTINGS, kFlag_ACK, 0);
LogIO(this, nullptr, "Generate Settings ACK", packet, kFrameHeaderBytes);
FlushOutputQueue();
}
void
Http2Session::GeneratePriority(uint32_t aID, uint8_t aPriorityWeight)
{
MOZ_ASSERT(PR_GetCurrentThread() == gSocketThread);
LOG3(("Http2Session::GeneratePriority %p %X %X\n",
this, aID, aPriorityWeight));
uint32_t frameSize = kFrameHeaderBytes + 5;
char *packet = EnsureOutputBuffer(frameSize);
mOutputQueueUsed += frameSize;
CreateFrameHeader(packet, 5, FRAME_TYPE_PRIORITY, 0, aID);
NetworkEndian::writeUint32(packet + kFrameHeaderBytes, 0);
memcpy(packet + frameSize - 1, &aPriorityWeight, 1);
LogIO(this, nullptr, "Generate Priority", packet, frameSize);
FlushOutputQueue();
}
void
Http2Session::GenerateRstStream(uint32_t aStatusCode, uint32_t aID)
{
MOZ_ASSERT(PR_GetCurrentThread() == gSocketThread);
// make sure we don't do this twice for the same stream (at least if we
// have a stream entry for it)
Http2Stream *stream = mStreamIDHash.Get(aID);
if (stream) {
if (stream->SentReset())
return;
stream->SetSentReset(true);
}
LOG3(("Http2Session::GenerateRst %p 0x%X %d\n", this, aID, aStatusCode));
uint32_t frameSize = kFrameHeaderBytes + 4;
char *packet = EnsureOutputBuffer(frameSize);
mOutputQueueUsed += frameSize;
CreateFrameHeader(packet, 4, FRAME_TYPE_RST_STREAM, 0, aID);
NetworkEndian::writeUint32(packet + kFrameHeaderBytes, aStatusCode);
LogIO(this, nullptr, "Generate Reset", packet, frameSize);
FlushOutputQueue();
}
void
Http2Session::GenerateGoAway(uint32_t aStatusCode)
{
MOZ_ASSERT(PR_GetCurrentThread() == gSocketThread);
LOG3(("Http2Session::GenerateGoAway %p code=%X\n", this, aStatusCode));
mClientGoAwayReason = aStatusCode;
uint32_t frameSize = kFrameHeaderBytes + 8;
char *packet = EnsureOutputBuffer(frameSize);
mOutputQueueUsed += frameSize;
CreateFrameHeader(packet, 8, FRAME_TYPE_GOAWAY, 0, 0);
// last-good-stream-id are bytes 9-12 reflecting pushes
NetworkEndian::writeUint32(packet + kFrameHeaderBytes, mOutgoingGoAwayID);
// bytes 13-16 are the status code.
NetworkEndian::writeUint32(packet + frameSize - 4, aStatusCode);
LogIO(this, nullptr, "Generate GoAway", packet, frameSize);
FlushOutputQueue();
}
// The Hello is comprised of
// 1] 24 octets of magic, which are designed to
// flush out silent but broken intermediaries
// 2] a settings frame which sets a small flow control window for pushes
// 3] a window update frame which creates a large session flow control window
// 4] 5 priority frames for streams which will never be opened with headers
// these streams (3, 5, 7, 9, b) build a dependency tree that all other
// streams will be direct leaves of.
void
Http2Session::SendHello()
{
MOZ_ASSERT(PR_GetCurrentThread() == gSocketThread);
LOG3(("Http2Session::SendHello %p\n", this));
// sized for magic + 5 settings and a session window update and 5 priority frames
// 24 magic, 33 for settings (9 header + 4 settings @6), 13 for window update,
// 5 priority frames at 14 (9 + 5) each
static const uint32_t maxSettings = 5;
static const uint32_t prioritySize = 5 * (kFrameHeaderBytes + 5);
static const uint32_t maxDataLen = 24 + kFrameHeaderBytes + maxSettings * 6 + 13 + prioritySize;
char *packet = EnsureOutputBuffer(maxDataLen);
memcpy(packet, kMagicHello, 24);
mOutputQueueUsed += 24;
LogIO(this, nullptr, "Magic Connection Header", packet, 24);
packet = mOutputQueueBuffer.get() + mOutputQueueUsed;
memset(packet, 0, maxDataLen - 24);
// frame header will be filled in after we know how long the frame is
uint8_t numberOfEntries = 0;
// entries need to be listed in order by ID
// 1st entry is bytes 9 to 14
// 2nd entry is bytes 15 to 20
// 3rd entry is bytes 21 to 26
// 4th entry is bytes 27 to 32
// 5th entry is bytes 33 to 38
// Let the other endpoint know about our default HPACK decompress table size
uint32_t maxHpackBufferSize = gHttpHandler->DefaultHpackBuffer();
mDecompressor.SetInitialMaxBufferSize(maxHpackBufferSize);
NetworkEndian::writeUint16(packet + kFrameHeaderBytes + (6 * numberOfEntries), SETTINGS_TYPE_HEADER_TABLE_SIZE);
NetworkEndian::writeUint32(packet + kFrameHeaderBytes + (6 * numberOfEntries) + 2, maxHpackBufferSize);
numberOfEntries++;
if (!gHttpHandler->AllowPush()) {
// If we don't support push then set MAX_CONCURRENT to 0 and also
// set ENABLE_PUSH to 0
NetworkEndian::writeUint16(packet + kFrameHeaderBytes + (6 * numberOfEntries), SETTINGS_TYPE_ENABLE_PUSH);
// The value portion of the setting pair is already initialized to 0
numberOfEntries++;
NetworkEndian::writeUint16(packet + kFrameHeaderBytes + (6 * numberOfEntries), SETTINGS_TYPE_MAX_CONCURRENT);
// The value portion of the setting pair is already initialized to 0
numberOfEntries++;
mWaitingForSettingsAck = true;
}
// Advertise the Push RWIN for the session, and on each new pull stream
// send a window update
NetworkEndian::writeUint16(packet + kFrameHeaderBytes + (6 * numberOfEntries), SETTINGS_TYPE_INITIAL_WINDOW);
NetworkEndian::writeUint32(packet + kFrameHeaderBytes + (6 * numberOfEntries) + 2, mPushAllowance);
numberOfEntries++;
// Make sure the other endpoint knows that we're sticking to the default max
// frame size
NetworkEndian::writeUint16(packet + kFrameHeaderBytes + (6 * numberOfEntries), SETTINGS_TYPE_MAX_FRAME_SIZE);
NetworkEndian::writeUint32(packet + kFrameHeaderBytes + (6 * numberOfEntries) + 2, kMaxFrameData);
numberOfEntries++;
MOZ_ASSERT(numberOfEntries <= maxSettings);
uint32_t dataLen = 6 * numberOfEntries;
CreateFrameHeader(packet, dataLen, FRAME_TYPE_SETTINGS, 0, 0);
mOutputQueueUsed += kFrameHeaderBytes + dataLen;
LogIO(this, nullptr, "Generate Settings", packet, kFrameHeaderBytes + dataLen);
// now bump the local session window from 64KB
uint32_t sessionWindowBump = mInitialRwin - kDefaultRwin;
if (kDefaultRwin < mInitialRwin) {
// send a window update for the session (Stream 0) for something large
mLocalSessionWindow = mInitialRwin;
packet = mOutputQueueBuffer.get() + mOutputQueueUsed;
CreateFrameHeader(packet, 4, FRAME_TYPE_WINDOW_UPDATE, 0, 0);
mOutputQueueUsed += kFrameHeaderBytes + 4;
NetworkEndian::writeUint32(packet + kFrameHeaderBytes, sessionWindowBump);
LOG3(("Session Window increase at start of session %p %u\n",
this, sessionWindowBump));
LogIO(this, nullptr, "Session Window Bump ", packet, kFrameHeaderBytes + 4);
}
if (gHttpHandler->UseH2Deps() && gHttpHandler->CriticalRequestPrioritization()) {
mUseH2Deps = true;
MOZ_ASSERT(mNextStreamID == kLeaderGroupID);
CreatePriorityNode(kLeaderGroupID, 0, 200, "leader");
mNextStreamID += 2;
MOZ_ASSERT(mNextStreamID == kOtherGroupID);
CreatePriorityNode(kOtherGroupID, 0, 100, "other");
mNextStreamID += 2;
MOZ_ASSERT(mNextStreamID == kBackgroundGroupID);
CreatePriorityNode(kBackgroundGroupID, 0, 0, "background");
mNextStreamID += 2;
MOZ_ASSERT(mNextStreamID == kSpeculativeGroupID);
CreatePriorityNode(kSpeculativeGroupID, kBackgroundGroupID, 0, "speculative");
mNextStreamID += 2;
MOZ_ASSERT(mNextStreamID == kFollowerGroupID);
CreatePriorityNode(kFollowerGroupID, kLeaderGroupID, 0, "follower");
mNextStreamID += 2;
}
FlushOutputQueue();
}
void
Http2Session::CreatePriorityNode(uint32_t streamID, uint32_t dependsOn, uint8_t weight,
const char *label)
{
char *packet = mOutputQueueBuffer.get() + mOutputQueueUsed;
CreateFrameHeader(packet, 5, FRAME_TYPE_PRIORITY, 0, streamID);
mOutputQueueUsed += kFrameHeaderBytes + 5;
NetworkEndian::writeUint32(packet + kFrameHeaderBytes, dependsOn); // depends on
packet[kFrameHeaderBytes + 4] = weight; // weight
LOG3(("Http2Session %p generate Priority Frame 0x%X depends on 0x%X "
"weight %d for %s class\n", this, streamID, dependsOn, weight, label));
LogIO(this, nullptr, "Priority dep node", packet, kFrameHeaderBytes + 5);
}
// perform a bunch of integrity checks on the stream.
// returns true if passed, false (plus LOG and ABORT) if failed.
bool
Http2Session::VerifyStream(Http2Stream *aStream, uint32_t aOptionalID = 0)
{
// This is annoying, but at least it is O(1)
MOZ_ASSERT(PR_GetCurrentThread() == gSocketThread);
#ifndef DEBUG
// Only do the real verification in debug builds
return true;
#endif
if (!aStream)
return true;
uint32_t test = 0;
do {
if (aStream->StreamID() == kDeadStreamID)
break;
nsAHttpTransaction *trans = aStream->Transaction();
test++;
if (!trans)
break;
test++;
if (mStreamTransactionHash.Get(trans) != aStream)
break;
if (aStream->StreamID()) {
Http2Stream *idStream = mStreamIDHash.Get(aStream->StreamID());
test++;
if (idStream != aStream)
break;
if (aOptionalID) {
test++;
if (idStream->StreamID() != aOptionalID)
break;
}
}
// tests passed
return true;
} while (0);
LOG3(("Http2Session %p VerifyStream Failure %p stream->id=0x%X "
"optionalID=0x%X trans=%p test=%d\n",
this, aStream, aStream->StreamID(),
aOptionalID, aStream->Transaction(), test));
MOZ_ASSERT(false, "VerifyStream");
return false;
}
void
Http2Session::CleanupStream(Http2Stream *aStream, nsresult aResult,
errorType aResetCode)
{
MOZ_ASSERT(PR_GetCurrentThread() == gSocketThread);
LOG3(("Http2Session::CleanupStream %p %p 0x%X %X\n",
this, aStream, aStream ? aStream->StreamID() : 0, aResult));
if (!aStream) {
return;
}
Http2PushedStream *pushSource = aStream->PushSource();
if (pushSource) {
// aStream is a synthetic attached to an even push
MOZ_ASSERT(pushSource->GetConsumerStream() == aStream);
MOZ_ASSERT(!aStream->StreamID());
MOZ_ASSERT(!(pushSource->StreamID() & 0x1));
aStream->ClearPushSource();
}
if (aStream->DeferCleanup(aResult)) {
LOG3(("Http2Session::CleanupStream 0x%X deferred\n", aStream->StreamID()));
return;
}
if (!VerifyStream(aStream)) {
LOG3(("Http2Session::CleanupStream failed to verify stream\n"));
return;
}
// don't reset a stream that has recevied a fin or rst
if (!aStream->RecvdFin() && !aStream->RecvdReset() && aStream->StreamID() &&
!(mInputFrameFinal && (aStream == mInputFrameDataStream))) { // !(recvdfin with mark pending)
LOG3(("Stream 0x%X had not processed recv FIN, sending RST code %X\n", aStream->StreamID(), aResetCode));
GenerateRstStream(aResetCode, aStream->StreamID());
}
CloseStream(aStream, aResult);
// Remove the stream from the ID hash table and, if an even id, the pushed
// table too.
uint32_t id = aStream->StreamID();
if (id > 0) {
mStreamIDHash.Remove(id);
if (!(id & 1)) {
mPushedStreams.RemoveElement(aStream);
Http2PushedStream *pushStream = static_cast<Http2PushedStream *>(aStream);
nsAutoCString hashKey;
pushStream->GetHashKey(hashKey);
nsIRequestContext *requestContext = aStream->RequestContext();
if (requestContext) {
SpdyPushCache *cache = nullptr;
requestContext->GetSpdyPushCache(&cache);
if (cache) {
Http2PushedStream *trash = cache->RemovePushedStreamHttp2(hashKey);
LOG3(("Http2Session::CleanupStream %p aStream=%p pushStream=%p trash=%p",
this, aStream, pushStream, trash));
}
}
}
}
RemoveStreamFromQueues(aStream);
// removing from the stream transaction hash will
// delete the Http2Stream and drop the reference to
// its transaction
mStreamTransactionHash.Remove(aStream->Transaction());
if (mShouldGoAway && !mStreamTransactionHash.Count())
Close(NS_OK);
if (pushSource) {
pushSource->SetDeferCleanupOnSuccess(false);
CleanupStream(pushSource, aResult, aResetCode);
}
}
void
Http2Session::CleanupStream(uint32_t aID, nsresult aResult, errorType aResetCode)
{
MOZ_ASSERT(PR_GetCurrentThread() == gSocketThread);
Http2Stream *stream = mStreamIDHash.Get(aID);
LOG3(("Http2Session::CleanupStream %p by ID 0x%X to stream %p\n",
this, aID, stream));
if (!stream) {
return;
}
CleanupStream(stream, aResult, aResetCode);
}
static void RemoveStreamFromQueue(Http2Stream *aStream, nsDeque &queue)
{
size_t size = queue.GetSize();
for (size_t count = 0; count < size; ++count) {
Http2Stream *stream = static_cast<Http2Stream *>(queue.PopFront());
if (stream != aStream)
queue.Push(stream);
}
}
void
Http2Session::RemoveStreamFromQueues(Http2Stream *aStream)
{
RemoveStreamFromQueue(aStream, mReadyForWrite);
RemoveStreamFromQueue(aStream, mQueuedStreams);
RemoveStreamFromQueue(aStream, mPushesReadyForRead);
RemoveStreamFromQueue(aStream, mSlowConsumersReadyForRead);
}
void
Http2Session::CloseStream(Http2Stream *aStream, nsresult aResult)
{
MOZ_ASSERT(PR_GetCurrentThread() == gSocketThread);
LOG3(("Http2Session::CloseStream %p %p 0x%x %X\n",
this, aStream, aStream->StreamID(), aResult));
MaybeDecrementConcurrent(aStream);
// Check if partial frame reader
if (aStream == mInputFrameDataStream) {
LOG3(("Stream had active partial read frame on close"));
ChangeDownstreamState(DISCARDING_DATA_FRAME);
mInputFrameDataStream = nullptr;
}
RemoveStreamFromQueues(aStream);
if (aStream->IsTunnel()) {
UnRegisterTunnel(aStream);
}
// Send the stream the close() indication
aStream->Close(aResult);
}
nsresult
Http2Session::SetInputFrameDataStream(uint32_t streamID)
{
mInputFrameDataStream = mStreamIDHash.Get(streamID);
if (VerifyStream(mInputFrameDataStream, streamID))
return NS_OK;
LOG3(("Http2Session::SetInputFrameDataStream failed to verify 0x%X\n",
streamID));
mInputFrameDataStream = nullptr;
return NS_ERROR_UNEXPECTED;
}
nsresult
Http2Session::ParsePadding(uint8_t &paddingControlBytes, uint16_t &paddingLength)
{
if (mInputFrameFlags & kFlag_PADDED) {
paddingLength = *reinterpret_cast<uint8_t *>(&mInputFrameBuffer[kFrameHeaderBytes]);
paddingControlBytes = 1;
} else {
paddingLength = 0;
paddingControlBytes = 0;
}
if (static_cast<uint32_t>(paddingLength + paddingControlBytes) > mInputFrameDataSize) {
// This is fatal to the session
LOG3(("Http2Session::ParsePadding %p stream 0x%x PROTOCOL_ERROR "
"paddingLength %d > frame size %d\n",
this, mInputFrameID, paddingLength, mInputFrameDataSize));
RETURN_SESSION_ERROR(this, PROTOCOL_ERROR);
}
return NS_OK;
}
nsresult
Http2Session::RecvHeaders(Http2Session *self)
{
MOZ_ASSERT(self->mInputFrameType == FRAME_TYPE_HEADERS ||
self->mInputFrameType == FRAME_TYPE_CONTINUATION);
bool isContinuation = self->mExpectedHeaderID != 0;
// If this doesn't have END_HEADERS set on it then require the next
// frame to be HEADERS of the same ID
bool endHeadersFlag = self->mInputFrameFlags & kFlag_END_HEADERS;
if (endHeadersFlag)
self->mExpectedHeaderID = 0;
else
self->mExpectedHeaderID = self->mInputFrameID;
uint32_t priorityLen = 0;
if (self->mInputFrameFlags & kFlag_PRIORITY) {
priorityLen = 5;
}
self->SetInputFrameDataStream(self->mInputFrameID);
// Find out how much padding this frame has, so we can only extract the real
// header data from the frame.
uint16_t paddingLength = 0;
uint8_t paddingControlBytes = 0;
nsresult rv;
if (!isContinuation) {
self->mDecompressBuffer.Truncate();
rv = self->ParsePadding(paddingControlBytes, paddingLength);
if (NS_FAILED(rv)) {
return rv;
}
}
LOG3(("Http2Session::RecvHeaders %p stream 0x%X priorityLen=%d stream=%p "
"end_stream=%d end_headers=%d priority_group=%d "
"paddingLength=%d padded=%d\n",
self, self->mInputFrameID, priorityLen, self->mInputFrameDataStream,
self->mInputFrameFlags & kFlag_END_STREAM,
self->mInputFrameFlags & kFlag_END_HEADERS,
self->mInputFrameFlags & kFlag_PRIORITY,
paddingLength,
self->mInputFrameFlags & kFlag_PADDED));
if ((paddingControlBytes + priorityLen + paddingLength) > self->mInputFrameDataSize) {
// This is fatal to the session
RETURN_SESSION_ERROR(self, PROTOCOL_ERROR);
}
if (!self->mInputFrameDataStream) {
// Cannot find stream. We can continue the session, but we need to
// uncompress the header block to maintain the correct compression context
LOG3(("Http2Session::RecvHeaders %p lookup mInputFrameID stream "
"0x%X failed. NextStreamID = 0x%X\n",
self, self->mInputFrameID, self->mNextStreamID));
if (self->mInputFrameID >= self->mNextStreamID)
self->GenerateRstStream(PROTOCOL_ERROR, self->mInputFrameID);
self->mDecompressBuffer.Append(&self->mInputFrameBuffer[kFrameHeaderBytes + paddingControlBytes + priorityLen],
self->mInputFrameDataSize - paddingControlBytes - priorityLen - paddingLength);
if (self->mInputFrameFlags & kFlag_END_HEADERS) {
rv = self->UncompressAndDiscard(false);
if (NS_FAILED(rv)) {
LOG3(("Http2Session::RecvHeaders uncompress failed\n"));
// this is fatal to the session
self->mGoAwayReason = COMPRESSION_ERROR;
return rv;
}
}
self->ResetDownstreamState();
return NS_OK;
}
// make sure this is either the first headers or a trailer
if (self->mInputFrameDataStream->AllHeadersReceived() &&
!(self->mInputFrameFlags & kFlag_END_STREAM)) {
// Any header block after the first that does *not* end the stream is
// illegal.
LOG3(("Http2Session::Illegal Extra HeaderBlock %p 0x%X\n", self, self->mInputFrameID));
RETURN_SESSION_ERROR(self, PROTOCOL_ERROR);
}
// queue up any compression bytes
self->mDecompressBuffer.Append(&self->mInputFrameBuffer[kFrameHeaderBytes + paddingControlBytes + priorityLen],
self->mInputFrameDataSize - paddingControlBytes - priorityLen - paddingLength);
self->mInputFrameDataStream->UpdateTransportReadEvents(self->mInputFrameDataSize);
self->mLastDataReadEpoch = self->mLastReadEpoch;
if (!endHeadersFlag) { // more are coming - don't process yet
self->ResetDownstreamState();
return NS_OK;
}
rv = self->ResponseHeadersComplete();
if (rv == NS_ERROR_ILLEGAL_VALUE) {
LOG3(("Http2Session::RecvHeaders %p PROTOCOL_ERROR detected stream 0x%X\n",
self, self->mInputFrameID));
self->CleanupStream(self->mInputFrameDataStream, rv, PROTOCOL_ERROR);
self->ResetDownstreamState();
rv = NS_OK;
} else if (NS_FAILED(rv)) {
// This is fatal to the session.
self->mGoAwayReason = COMPRESSION_ERROR;
}
return rv;
}
// ResponseHeadersComplete() returns NS_ERROR_ILLEGAL_VALUE when the stream
// should be reset with a PROTOCOL_ERROR, NS_OK when the response headers were
// fine, and any other error is fatal to the session.
nsresult
Http2Session::ResponseHeadersComplete()
{
LOG3(("Http2Session::ResponseHeadersComplete %p for 0x%X fin=%d",
this, mInputFrameDataStream->StreamID(), mInputFrameFinal));
// only interpret headers once, afterwards ignore as trailers
if (mInputFrameDataStream->AllHeadersReceived()) {
LOG3(("Http2Session::ResponseHeadersComplete extra headers"));
MOZ_ASSERT(mInputFrameFlags & kFlag_END_STREAM);
nsresult rv = UncompressAndDiscard(false);
if (NS_FAILED(rv)) {
LOG3(("Http2Session::ResponseHeadersComplete extra uncompress failed\n"));
return rv;
}
mFlatHTTPResponseHeadersOut = 0;
mFlatHTTPResponseHeaders.Truncate();
if (mInputFrameFinal) {
// need to process the fin
ChangeDownstreamState(PROCESSING_COMPLETE_HEADERS);
} else {
ResetDownstreamState();
}
return NS_OK;
}
// if this turns out to be a 1xx response code we have to
// undo the headers received bit that we are setting here.
bool didFirstSetAllRecvd = !mInputFrameDataStream->AllHeadersReceived();
mInputFrameDataStream->SetAllHeadersReceived();
// The stream needs to see flattened http headers
// Uncompressed http/2 format headers currently live in
// Http2Stream::mDecompressBuffer - convert that to HTTP format in
// mFlatHTTPResponseHeaders via ConvertHeaders()
nsresult rv;
int32_t httpResponseCode; // out param to ConvertResponseHeaders
mFlatHTTPResponseHeadersOut = 0;
rv = mInputFrameDataStream->ConvertResponseHeaders(&mDecompressor,
mDecompressBuffer,
mFlatHTTPResponseHeaders,
httpResponseCode);
if (rv == NS_ERROR_NET_RESET) {
LOG(("Http2Session::ResponseHeadersComplete %p ConvertResponseHeaders reset\n", this));
// This means the stream found connection-oriented auth. Treat this like we
// got a reset with HTTP_1_1_REQUIRED.
mInputFrameDataStream->Transaction()->DisableSpdy();
CleanupStream(mInputFrameDataStream, NS_ERROR_NET_RESET, CANCEL_ERROR);
ResetDownstreamState();
return NS_OK;
} else if (NS_FAILED(rv)) {
return rv;
}
// allow more headers in the case of 1xx
if (((httpResponseCode / 100) == 1) && didFirstSetAllRecvd) {
mInputFrameDataStream->UnsetAllHeadersReceived();
}
ChangeDownstreamState(PROCESSING_COMPLETE_HEADERS);
return NS_OK;
}
nsresult
Http2Session::RecvPriority(Http2Session *self)
{
MOZ_ASSERT(self->mInputFrameType == FRAME_TYPE_PRIORITY);
if (self->mInputFrameDataSize != 5) {
LOG3(("Http2Session::RecvPriority %p wrong length data=%d\n",
self, self->mInputFrameDataSize));
RETURN_SESSION_ERROR(self, PROTOCOL_ERROR);
}
if (!self->mInputFrameID) {
LOG3(("Http2Session::RecvPriority %p stream ID of 0.\n", self));
RETURN_SESSION_ERROR(self, PROTOCOL_ERROR);
}
nsresult rv = self->SetInputFrameDataStream(self->mInputFrameID);
if (NS_FAILED(rv))
return rv;
uint32_t newPriorityDependency = NetworkEndian::readUint32(
self->mInputFrameBuffer.get() + kFrameHeaderBytes);
bool exclusive = !!(newPriorityDependency & 0x80000000);
newPriorityDependency &= 0x7fffffff;
uint8_t newPriorityWeight = *(self->mInputFrameBuffer.get() + kFrameHeaderBytes + 4);
if (self->mInputFrameDataStream) {
self->mInputFrameDataStream->SetPriorityDependency(newPriorityDependency,
newPriorityWeight,
exclusive);
}
self->ResetDownstreamState();
return NS_OK;
}
nsresult
Http2Session::RecvRstStream(Http2Session *self)
{
MOZ_ASSERT(self->mInputFrameType == FRAME_TYPE_RST_STREAM);
if (self->mInputFrameDataSize != 4) {
LOG3(("Http2Session::RecvRstStream %p RST_STREAM wrong length data=%d",
self, self->mInputFrameDataSize));
RETURN_SESSION_ERROR(self, PROTOCOL_ERROR);
}
if (!self->mInputFrameID) {
LOG3(("Http2Session::RecvRstStream %p stream ID of 0.\n", self));
RETURN_SESSION_ERROR(self, PROTOCOL_ERROR);
}
self->mDownstreamRstReason = NetworkEndian::readUint32(
self->mInputFrameBuffer.get() + kFrameHeaderBytes);
LOG3(("Http2Session::RecvRstStream %p RST_STREAM Reason Code %u ID %x\n",
self, self->mDownstreamRstReason, self->mInputFrameID));
self->SetInputFrameDataStream(self->mInputFrameID);
if (!self->mInputFrameDataStream) {
// if we can't find the stream just ignore it (4.2 closed)
self->ResetDownstreamState();
return NS_OK;
}
self->mInputFrameDataStream->SetRecvdReset(true);
self->MaybeDecrementConcurrent(self->mInputFrameDataStream);
self->ChangeDownstreamState(PROCESSING_CONTROL_RST_STREAM);
return NS_OK;
}
nsresult
Http2Session::RecvSettings(Http2Session *self)
{
MOZ_ASSERT(self->mInputFrameType == FRAME_TYPE_SETTINGS);
if (self->mInputFrameID) {
LOG3(("Http2Session::RecvSettings %p needs stream ID of 0. 0x%X\n",
self, self->mInputFrameID));
RETURN_SESSION_ERROR(self, PROTOCOL_ERROR);
}
if (self->mInputFrameDataSize % 6) {
// Number of Settings is determined by dividing by each 6 byte setting
// entry. So the payload must be a multiple of 6.
LOG3(("Http2Session::RecvSettings %p SETTINGS wrong length data=%d",
self, self->mInputFrameDataSize));
RETURN_SESSION_ERROR(self, PROTOCOL_ERROR);
}
uint32_t numEntries = self->mInputFrameDataSize / 6;
LOG3(("Http2Session::RecvSettings %p SETTINGS Control Frame "
"with %d entries ack=%X", self, numEntries,
self->mInputFrameFlags & kFlag_ACK));
if ((self->mInputFrameFlags & kFlag_ACK) && self->mInputFrameDataSize) {
LOG3(("Http2Session::RecvSettings %p ACK with non zero payload is err\n"));
RETURN_SESSION_ERROR(self, PROTOCOL_ERROR);
}
for (uint32_t index = 0; index < numEntries; ++index) {
uint8_t *setting = reinterpret_cast<uint8_t *>
(self->mInputFrameBuffer.get()) + kFrameHeaderBytes + index * 6;
uint16_t id = NetworkEndian::readUint16(setting);
uint32_t value = NetworkEndian::readUint32(setting + 2);
LOG3(("Settings ID %u, Value %u", id, value));
switch (id)
{
case SETTINGS_TYPE_HEADER_TABLE_SIZE:
LOG3(("Compression header table setting received: %d\n", value));
self->mCompressor.SetMaxBufferSize(value);
break;
case SETTINGS_TYPE_ENABLE_PUSH:
LOG3(("Client received an ENABLE Push SETTING. Odd.\n"));
// nop
break;
case SETTINGS_TYPE_MAX_CONCURRENT:
self->mMaxConcurrent = value;
self->ProcessPending();
break;
case SETTINGS_TYPE_INITIAL_WINDOW:
{
int32_t delta = value - self->mServerInitialStreamWindow;
self->mServerInitialStreamWindow = value;
// SETTINGS only adjusts stream windows. Leave the session window alone.
// We need to add the delta to all open streams (delta can be negative)
for (auto iter = self->mStreamTransactionHash.Iter();
!iter.Done();
iter.Next()) {
iter.Data()->UpdateServerReceiveWindow(delta);
}
}
break;
case SETTINGS_TYPE_MAX_FRAME_SIZE:
{
if ((value < kMaxFrameData) || (value >= 0x01000000)) {
LOG3(("Received invalid max frame size 0x%X", value));
RETURN_SESSION_ERROR(self, PROTOCOL_ERROR);
}
// We stick to the default for simplicity's sake, so nothing to change
}
break;
default:
break;
}
}
self->ResetDownstreamState();
if (!(self->mInputFrameFlags & kFlag_ACK)) {
self->GenerateSettingsAck();
} else if (self->mWaitingForSettingsAck) {
self->mGoAwayOnPush = true;
}
return NS_OK;
}
nsresult
Http2Session::RecvPushPromise(Http2Session *self)
{
MOZ_ASSERT(self->mInputFrameType == FRAME_TYPE_PUSH_PROMISE ||
self->mInputFrameType == FRAME_TYPE_CONTINUATION);
// Find out how much padding this frame has, so we can only extract the real
// header data from the frame.
uint16_t paddingLength = 0;
uint8_t paddingControlBytes = 0;
// If this doesn't have END_PUSH_PROMISE set on it then require the next
// frame to be PUSH_PROMISE of the same ID
uint32_t promiseLen;
uint32_t promisedID;
if (self->mExpectedPushPromiseID) {
promiseLen = 0; // really a continuation frame
promisedID = self->mContinuedPromiseStream;
} else {
self->mDecompressBuffer.Truncate();
nsresult rv = self->ParsePadding(paddingControlBytes, paddingLength);
if (NS_FAILED(rv)) {
return rv;
}
promiseLen = 4;
promisedID = NetworkEndian::readUint32(
self->mInputFrameBuffer.get() + kFrameHeaderBytes + paddingControlBytes);
promisedID &= 0x7fffffff;
if (promisedID <= self->mLastPushedID) {
LOG3(("Http2Session::RecvPushPromise %p ID too low %u expected > %u.\n",
self, promisedID, self->mLastPushedID));
RETURN_SESSION_ERROR(self, PROTOCOL_ERROR);
}
self->mLastPushedID = promisedID;
}
uint32_t associatedID = self->mInputFrameID;
if (self->mInputFrameFlags & kFlag_END_PUSH_PROMISE) {
self->mExpectedPushPromiseID = 0;
self->mContinuedPromiseStream = 0;
} else {
self->mExpectedPushPromiseID = self->mInputFrameID;
self->mContinuedPromiseStream = promisedID;
}
if ((paddingControlBytes + promiseLen + paddingLength) > self->mInputFrameDataSize) {
// This is fatal to the session
LOG3(("Http2Session::RecvPushPromise %p ID 0x%X assoc ID 0x%X "
"PROTOCOL_ERROR extra %d > frame size %d\n",
self, promisedID, associatedID, (paddingControlBytes + promiseLen + paddingLength),
self->mInputFrameDataSize));
RETURN_SESSION_ERROR(self, PROTOCOL_ERROR);
}
LOG3(("Http2Session::RecvPushPromise %p ID 0x%X assoc ID 0x%X "
"paddingLength %d padded %d\n",
self, promisedID, associatedID, paddingLength,
self->mInputFrameFlags & kFlag_PADDED));
if (!associatedID || !promisedID || (promisedID & 1)) {
LOG3(("Http2Session::RecvPushPromise %p ID invalid.\n", self));
RETURN_SESSION_ERROR(self, PROTOCOL_ERROR);
}
// confirm associated-to
nsresult rv = self->SetInputFrameDataStream(associatedID);
if (NS_FAILED(rv))
return rv;
Http2Stream *associatedStream = self->mInputFrameDataStream;
++(self->mServerPushedResources);
// Anytime we start using the high bit of stream ID (either client or server)
// begin to migrate to a new session.
if (promisedID >= kMaxStreamID)
self->mShouldGoAway = true;
bool resetStream = true;
SpdyPushCache *cache = nullptr;
if (self->mShouldGoAway && !Http2PushedStream::TestOnPush(associatedStream)) {
LOG3(("Http2Session::RecvPushPromise %p cache push while in GoAway "
"mode refused.\n", self));
self->GenerateRstStream(REFUSED_STREAM_ERROR, promisedID);
} else if (!gHttpHandler->AllowPush()) {
// ENABLE_PUSH and MAX_CONCURRENT_STREAMS of 0 in settings disabled push
LOG3(("Http2Session::RecvPushPromise Push Recevied when Disabled\n"));
if (self->mGoAwayOnPush) {
LOG3(("Http2Session::RecvPushPromise sending GOAWAY"));
RETURN_SESSION_ERROR(self, PROTOCOL_ERROR);
}
self->GenerateRstStream(REFUSED_STREAM_ERROR, promisedID);
} else if (!(associatedID & 1)) {
LOG3(("Http2Session::RecvPushPromise %p assocated=0x%X on pushed (even) stream not allowed\n",
self, associatedID));
self->GenerateRstStream(PROTOCOL_ERROR, promisedID);
} else if (!associatedStream) {
LOG3(("Http2Session::RecvPushPromise %p lookup associated ID failed.\n", self));
self->GenerateRstStream(PROTOCOL_ERROR, promisedID);
} else {
nsIRequestContext *requestContext = associatedStream->RequestContext();
if (requestContext) {
requestContext->GetSpdyPushCache(&cache);
if (!cache) {
cache = new SpdyPushCache();
if (!cache || NS_FAILED(requestContext->SetSpdyPushCache(cache))) {
delete cache;
cache = nullptr;
}
}
}
if (!cache) {
// this is unexpected, but we can handle it just by refusing the push
LOG3(("Http2Session::RecvPushPromise Push Recevied without push cache\n"));
self->GenerateRstStream(REFUSED_STREAM_ERROR, promisedID);
} else {
resetStream = false;
}
}
if (resetStream) {
// Need to decompress the headers even though we aren't using them yet in
// order to keep the compression context consistent for other frames
self->mDecompressBuffer.Append(&self->mInputFrameBuffer[kFrameHeaderBytes + paddingControlBytes + promiseLen],
self->mInputFrameDataSize - paddingControlBytes - promiseLen - paddingLength);
if (self->mInputFrameFlags & kFlag_END_PUSH_PROMISE) {
rv = self->UncompressAndDiscard(true);
if (NS_FAILED(rv)) {
LOG3(("Http2Session::RecvPushPromise uncompress failed\n"));
self->mGoAwayReason = COMPRESSION_ERROR;
return rv;
}
}
self->ResetDownstreamState();
return NS_OK;
}
self->mDecompressBuffer.Append(&self->mInputFrameBuffer[kFrameHeaderBytes + paddingControlBytes + promiseLen],
self->mInputFrameDataSize - paddingControlBytes - promiseLen - paddingLength);
if (!(self->mInputFrameFlags & kFlag_END_PUSH_PROMISE)) {
LOG3(("Http2Session::RecvPushPromise not finishing processing for multi-frame push\n"));
self->ResetDownstreamState();
return NS_OK;
}
// Create the buffering transaction and push stream
RefPtr<Http2PushTransactionBuffer> transactionBuffer =
new Http2PushTransactionBuffer();
transactionBuffer->SetConnection(self);
Http2PushedStream *pushedStream =
new Http2PushedStream(transactionBuffer, self, associatedStream, promisedID);
rv = pushedStream->ConvertPushHeaders(&self->mDecompressor,
self->mDecompressBuffer,
pushedStream->GetRequestString());
if (rv == NS_ERROR_NOT_IMPLEMENTED) {
LOG3(("Http2Session::PushPromise Semantics not Implemented\n"));
self->GenerateRstStream(REFUSED_STREAM_ERROR, promisedID);
delete pushedStream;
self->ResetDownstreamState();
return NS_OK;
}
if (rv == NS_ERROR_ILLEGAL_VALUE) {
// This means the decompression completed ok, but there was a problem with
// the decoded headers. Reset the stream and go away.
self->GenerateRstStream(PROTOCOL_ERROR, promisedID);
delete pushedStream;
self->ResetDownstreamState();
return NS_OK;
} else if (NS_FAILED(rv)) {
// This is fatal to the session.
self->mGoAwayReason = COMPRESSION_ERROR;
return rv;
}
// Ownership of the pushed stream is by the transaction hash, just as it
// is for a client initiated stream. Errors that aren't fatal to the
// whole session must call cleanupStream() after this point in order
// to remove the stream from that hash.
self->mStreamTransactionHash.Put(transactionBuffer, pushedStream);
self->mPushedStreams.AppendElement(pushedStream);
if (self->RegisterStreamID(pushedStream, promisedID) == kDeadStreamID) {
LOG3(("Http2Session::RecvPushPromise registerstreamid failed\n"));
self->mGoAwayReason = INTERNAL_ERROR;
return NS_ERROR_FAILURE;
}
if (promisedID > self->mOutgoingGoAwayID)
self->mOutgoingGoAwayID = promisedID;
// Fake the request side of the pushed HTTP transaction. Sets up hash
// key and origin
uint32_t notUsed;
pushedStream->ReadSegments(nullptr, 1, &notUsed);
nsAutoCString key;
if (!pushedStream->GetHashKey(key)) {
LOG3(("Http2Session::RecvPushPromise one of :authority :scheme :path missing from push\n"));
self->CleanupStream(pushedStream, NS_ERROR_FAILURE, PROTOCOL_ERROR);
self->ResetDownstreamState();
return NS_OK;
}
RefPtr<nsStandardURL> associatedURL, pushedURL;
rv = Http2Stream::MakeOriginURL(associatedStream->Origin(), associatedURL);
if (NS_SUCCEEDED(rv)) {
rv = Http2Stream::MakeOriginURL(pushedStream->Origin(), pushedURL);
}
LOG3(("Http2Session::RecvPushPromise %p checking %s == %s", self,
associatedStream->Origin().get(), pushedStream->Origin().get()));
bool match = false;
if (NS_SUCCEEDED(rv)) {
rv = associatedURL->Equals(pushedURL, &match);
}
if (NS_FAILED(rv)) {
// Fallback to string equality of origins. This won't be guaranteed to be as
// liberal as we want it to be, but it will at least be safe
match = associatedStream->Origin().Equals(pushedStream->Origin());
}
if (!match) {
LOG3(("Http2Session::RecvPushPromise %p pushed stream mismatched origin "
"associated origin %s .. pushed origin %s\n", self,
associatedStream->Origin().get(), pushedStream->Origin().get()));
self->CleanupStream(pushedStream, NS_ERROR_FAILURE, REFUSED_STREAM_ERROR);
self->ResetDownstreamState();
return NS_OK;
}
if (pushedStream->TryOnPush()) {
LOG3(("Http2Session::RecvPushPromise %p channel implements nsIHttpPushListener "
"stream %p will not be placed into session cache.\n", self, pushedStream));
} else {
LOG3(("Http2Session::RecvPushPromise %p place stream into session cache\n", self));
if (!cache->RegisterPushedStreamHttp2(key, pushedStream)) {
LOG3(("Http2Session::RecvPushPromise registerPushedStream Failed\n"));
self->CleanupStream(pushedStream, NS_ERROR_FAILURE, INTERNAL_ERROR);
self->ResetDownstreamState();
return NS_OK;
}
}
pushedStream->SetHTTPState(Http2Stream::RESERVED_BY_REMOTE);
static_assert(Http2Stream::kWorstPriority >= 0,
"kWorstPriority out of range");
uint8_t priorityWeight = (nsISupportsPriority::PRIORITY_LOWEST + 1) -
(Http2Stream::kWorstPriority - Http2Stream::kNormalPriority);
pushedStream->SetPriority(Http2Stream::kWorstPriority);
self->GeneratePriority(promisedID, priorityWeight);
self->ResetDownstreamState();
return NS_OK;
}
nsresult
Http2Session::RecvPing(Http2Session *self)
{
MOZ_ASSERT(self->mInputFrameType == FRAME_TYPE_PING);
LOG3(("Http2Session::RecvPing %p PING Flags 0x%X.", self,
self->mInputFrameFlags));
if (self->mInputFrameDataSize != 8) {
LOG3(("Http2Session::RecvPing %p PING had wrong amount of data %d",
self, self->mInputFrameDataSize));
RETURN_SESSION_ERROR(self, FRAME_SIZE_ERROR);
}
if (self->mInputFrameID) {
LOG3(("Http2Session::RecvPing %p PING needs stream ID of 0. 0x%X\n",
self, self->mInputFrameID));
RETURN_SESSION_ERROR(self, PROTOCOL_ERROR);
}
if (self->mInputFrameFlags & kFlag_ACK) {
// presumably a reply to our timeout ping.. don't reply to it
self->mPingSentEpoch = 0;
} else {
// reply with a ack'd ping
self->GeneratePing(true);
}
self->ResetDownstreamState();
return NS_OK;
}
nsresult
Http2Session::RecvGoAway(Http2Session *self)
{
MOZ_ASSERT(self->mInputFrameType == FRAME_TYPE_GOAWAY);
if (self->mInputFrameDataSize < 8) {
// data > 8 is an opaque token that we can't interpret. NSPR Logs will
// have the hex of all packets so there is no point in separately logging.
LOG3(("Http2Session::RecvGoAway %p GOAWAY had wrong amount of data %d",
self, self->mInputFrameDataSize));
RETURN_SESSION_ERROR(self, PROTOCOL_ERROR);
}
if (self->mInputFrameID) {
LOG3(("Http2Session::RecvGoAway %p GOAWAY had non zero stream ID 0x%X\n",
self, self->mInputFrameID));
RETURN_SESSION_ERROR(self, PROTOCOL_ERROR);
}
self->mShouldGoAway = true;
self->mGoAwayID = NetworkEndian::readUint32(
self->mInputFrameBuffer.get() + kFrameHeaderBytes);
self->mGoAwayID &= 0x7fffffff;
self->mCleanShutdown = true;
self->mPeerGoAwayReason = NetworkEndian::readUint32(
self->mInputFrameBuffer.get() + kFrameHeaderBytes + 4);
// Find streams greater than the last-good ID and mark them for deletion
// in the mGoAwayStreamsToRestart queue. The underlying transaction can be
// restarted.
for (auto iter = self->mStreamTransactionHash.Iter();
!iter.Done();
iter.Next()) {
// these streams were not processed by the server and can be restarted.
// Do that after the enumerator completes to avoid the risk of
// a restart event re-entrantly modifying this hash. Be sure not to restart
// a pushed (even numbered) stream
nsAutoPtr<Http2Stream>& stream = iter.Data();
if ((stream->StreamID() > self->mGoAwayID && (stream->StreamID() & 1)) ||
!stream->HasRegisteredID()) {
self->mGoAwayStreamsToRestart.Push(stream);
}
}
// Process the streams marked for deletion and restart.
size_t size = self->mGoAwayStreamsToRestart.GetSize();
for (size_t count = 0; count < size; ++count) {
Http2Stream *stream =
static_cast<Http2Stream *>(self->mGoAwayStreamsToRestart.PopFront());
if (self->mPeerGoAwayReason == HTTP_1_1_REQUIRED) {
stream->Transaction()->DisableSpdy();
}
self->CloseStream(stream, NS_ERROR_NET_RESET);
if (stream->HasRegisteredID())
self->mStreamIDHash.Remove(stream->StreamID());
self->mStreamTransactionHash.Remove(stream->Transaction());
}
// Queued streams can also be deleted from this session and restarted
// in another one. (they were never sent on the network so they implicitly
// are not covered by the last-good id.
size = self->mQueuedStreams.GetSize();
for (size_t count = 0; count < size; ++count) {
Http2Stream *stream =
static_cast<Http2Stream *>(self->mQueuedStreams.PopFront());
MOZ_ASSERT(stream->Queued());
stream->SetQueued(false);
if (self->mPeerGoAwayReason == HTTP_1_1_REQUIRED) {
stream->Transaction()->DisableSpdy();
}
self->CloseStream(stream, NS_ERROR_NET_RESET);
self->mStreamTransactionHash.Remove(stream->Transaction());
}
LOG3(("Http2Session::RecvGoAway %p GOAWAY Last-Good-ID 0x%X status 0x%X "
"live streams=%d\n", self, self->mGoAwayID, self->mPeerGoAwayReason,
self->mStreamTransactionHash.Count()));
self->ResetDownstreamState();
return NS_OK;
}
nsresult
Http2Session::RecvWindowUpdate(Http2Session *self)
{
MOZ_ASSERT(self->mInputFrameType == FRAME_TYPE_WINDOW_UPDATE);
if (self->mInputFrameDataSize != 4) {
LOG3(("Http2Session::RecvWindowUpdate %p Window Update wrong length %d\n",
self, self->mInputFrameDataSize));
RETURN_SESSION_ERROR(self, PROTOCOL_ERROR);
}
uint32_t delta = NetworkEndian::readUint32(
self->mInputFrameBuffer.get() + kFrameHeaderBytes);
delta &= 0x7fffffff;
LOG3(("Http2Session::RecvWindowUpdate %p len=%d Stream 0x%X.\n",
self, delta, self->mInputFrameID));
if (self->mInputFrameID) { // stream window
nsresult rv = self->SetInputFrameDataStream(self->mInputFrameID);
if (NS_FAILED(rv))
return rv;
if (!self->mInputFrameDataStream) {
LOG3(("Http2Session::RecvWindowUpdate %p lookup streamID 0x%X failed.\n",
self, self->mInputFrameID));
// only resest the session if the ID is one we haven't ever opened
if (self->mInputFrameID >= self->mNextStreamID)
self->GenerateRstStream(PROTOCOL_ERROR, self->mInputFrameID);
self->ResetDownstreamState();
return NS_OK;
}
if (delta == 0) {
LOG3(("Http2Session::RecvWindowUpdate %p received 0 stream window update",
self));
self->CleanupStream(self->mInputFrameDataStream, NS_ERROR_ILLEGAL_VALUE,
PROTOCOL_ERROR);
self->ResetDownstreamState();
return NS_OK;
}
int64_t oldRemoteWindow = self->mInputFrameDataStream->ServerReceiveWindow();
self->mInputFrameDataStream->UpdateServerReceiveWindow(delta);
if (self->mInputFrameDataStream->ServerReceiveWindow() >= 0x80000000) {
// a window cannot reach 2^31 and be in compliance. Our calculations
// are 64 bit safe though.
LOG3(("Http2Session::RecvWindowUpdate %p stream window "
"exceeds 2^31 - 1\n", self));
self->CleanupStream(self->mInputFrameDataStream, NS_ERROR_ILLEGAL_VALUE,
FLOW_CONTROL_ERROR);
self->ResetDownstreamState();
return NS_OK;
}
LOG3(("Http2Session::RecvWindowUpdate %p stream 0x%X window "
"%d increased by %d now %d.\n", self, self->mInputFrameID,
oldRemoteWindow, delta, oldRemoteWindow + delta));
} else { // session window update
if (delta == 0) {
LOG3(("Http2Session::RecvWindowUpdate %p received 0 session window update",
self));
RETURN_SESSION_ERROR(self, PROTOCOL_ERROR);
}
int64_t oldRemoteWindow = self->mServerSessionWindow;
self->mServerSessionWindow += delta;
if (self->mServerSessionWindow >= 0x80000000) {
// a window cannot reach 2^31 and be in compliance. Our calculations
// are 64 bit safe though.
LOG3(("Http2Session::RecvWindowUpdate %p session window "
"exceeds 2^31 - 1\n", self));
RETURN_SESSION_ERROR(self, FLOW_CONTROL_ERROR);
}
if ((oldRemoteWindow <= 0) && (self->mServerSessionWindow > 0)) {
LOG3(("Http2Session::RecvWindowUpdate %p restart session window\n",
self));
for (auto iter = self->mStreamTransactionHash.Iter();
!iter.Done();
iter.Next()) {
MOZ_ASSERT(self->mServerSessionWindow > 0);
nsAutoPtr<Http2Stream>& stream = iter.Data();
if (!stream->BlockedOnRwin() || stream->ServerReceiveWindow() <= 0) {
continue;
}
self->mReadyForWrite.Push(stream);
self->SetWriteCallbacks();
}
}
LOG3(("Http2Session::RecvWindowUpdate %p session window "
"%d increased by %d now %d.\n", self,
oldRemoteWindow, delta, oldRemoteWindow + delta));
}
self->ResetDownstreamState();
return NS_OK;
}
nsresult
Http2Session::RecvContinuation(Http2Session *self)
{
MOZ_ASSERT(self->mInputFrameType == FRAME_TYPE_CONTINUATION);
MOZ_ASSERT(self->mInputFrameID);
MOZ_ASSERT(self->mExpectedPushPromiseID || self->mExpectedHeaderID);
MOZ_ASSERT(!(self->mExpectedPushPromiseID && self->mExpectedHeaderID));
LOG3(("Http2Session::RecvContinuation %p Flags 0x%X id 0x%X "
"promise id 0x%X header id 0x%X\n",
self, self->mInputFrameFlags, self->mInputFrameID,
self->mExpectedPushPromiseID, self->mExpectedHeaderID));
self->SetInputFrameDataStream(self->mInputFrameID);
if (!self->mInputFrameDataStream) {
LOG3(("Http2Session::RecvContination stream ID 0x%X not found.",
self->mInputFrameID));
RETURN_SESSION_ERROR(self, PROTOCOL_ERROR);
}
// continued headers
if (self->mExpectedHeaderID) {
self->mInputFrameFlags &= ~kFlag_PRIORITY;
return RecvHeaders(self);
}
// continued push promise
if (self->mInputFrameFlags & kFlag_END_HEADERS) {
self->mInputFrameFlags &= ~kFlag_END_HEADERS;
self->mInputFrameFlags |= kFlag_END_PUSH_PROMISE;
}
return RecvPushPromise(self);
}
class UpdateAltSvcEvent : public Runnable
{
public:
UpdateAltSvcEvent(const nsCString &header,
const nsCString &aOrigin,
nsHttpConnectionInfo *aCI,
nsIInterfaceRequestor *callbacks)
: mHeader(header)
, mOrigin(aOrigin)
, mCI(aCI)
, mCallbacks(callbacks)
{
}
NS_IMETHOD Run() override
{
MOZ_ASSERT(NS_IsMainThread());
nsCString originScheme;
nsCString originHost;
int32_t originPort = -1;
nsCOMPtr<nsIURI> uri;
if (NS_FAILED(NS_NewURI(getter_AddRefs(uri), mOrigin))) {
LOG(("UpdateAltSvcEvent origin does not parse %s\n",
mOrigin.get()));
return NS_OK;
}
uri->GetScheme(originScheme);
uri->GetHost(originHost);
uri->GetPort(&originPort);
AltSvcMapping::ProcessHeader(mHeader, originScheme, originHost, originPort,
mCI->GetUsername(), mCI->GetPrivate(), mCallbacks,
mCI->ProxyInfo(), 0, mCI->GetOriginAttributes());
return NS_OK;
}
private:
nsCString mHeader;
nsCString mOrigin;
RefPtr<nsHttpConnectionInfo> mCI;
nsCOMPtr<nsIInterfaceRequestor> mCallbacks;
};
// defined as an http2 extension - alt-svc
// defines receipt of frame type 0x0A.. See AlternateSevices.h at least draft -06 sec 4
// as this is an extension, never generate protocol error - just ignore problems
nsresult
Http2Session::RecvAltSvc(Http2Session *self)
{
MOZ_ASSERT(self->mInputFrameType == FRAME_TYPE_ALTSVC);
LOG3(("Http2Session::RecvAltSvc %p Flags 0x%X id 0x%X\n", self,
self->mInputFrameFlags, self->mInputFrameID));
if (self->mInputFrameDataSize < 2) {
LOG3(("Http2Session::RecvAltSvc %p frame too small", self));
self->ResetDownstreamState();
return NS_OK;
}
uint16_t originLen = NetworkEndian::readUint16(
self->mInputFrameBuffer.get() + kFrameHeaderBytes);
if (originLen + 2U > self->mInputFrameDataSize) {
LOG3(("Http2Session::RecvAltSvc %p origin len too big for frame", self));
self->ResetDownstreamState();
return NS_OK;
}
if (!gHttpHandler->AllowAltSvc()) {
LOG3(("Http2Session::RecvAltSvc %p frame alt service pref'd off", self));
self->ResetDownstreamState();
return NS_OK;
}
uint16_t altSvcFieldValueLen = static_cast<uint16_t>(self->mInputFrameDataSize) - 2U - originLen;
LOG3(("Http2Session::RecvAltSvc %p frame originLen=%u altSvcFieldValueLen=%u\n",
self, originLen, altSvcFieldValueLen));
if (self->mInputFrameDataSize > 2000) {
LOG3(("Http2Session::RecvAltSvc %p frame too large to parse sensibly", self));
self->ResetDownstreamState();
return NS_OK;
}
nsAutoCString origin;
bool impliedOrigin = true;
if (originLen) {
origin.Assign(self->mInputFrameBuffer.get() + kFrameHeaderBytes + 2, originLen);
impliedOrigin = false;
}
nsAutoCString altSvcFieldValue;
if (altSvcFieldValueLen) {
altSvcFieldValue.Assign(self->mInputFrameBuffer.get() + kFrameHeaderBytes + 2 + originLen,
altSvcFieldValueLen);
}
if (altSvcFieldValue.IsEmpty() || !nsHttp::IsReasonableHeaderValue(altSvcFieldValue)) {
LOG(("Http2Session %p Alt-Svc Response Header seems unreasonable - skipping\n", self));
self->ResetDownstreamState();
return NS_OK;
}
if (self->mInputFrameID & 1) {
// pulled streams apply to the origin of the pulled stream.
// If the origin field is filled in the frame, the frame should be ignored
if (!origin.IsEmpty()) {
LOG(("Http2Session %p Alt-Svc pulled stream has non empty origin\n", self));
self->ResetDownstreamState();
return NS_OK;
}
if (NS_FAILED(self->SetInputFrameDataStream(self->mInputFrameID)) ||
!self->mInputFrameDataStream ||
!self->mInputFrameDataStream->Transaction() ||
!self->mInputFrameDataStream->Transaction()->RequestHead()) {
LOG3(("Http2Session::RecvAltSvc %p got frame w/o origin on invalid stream", self));
self->ResetDownstreamState();
return NS_OK;
}
self->mInputFrameDataStream->Transaction()->RequestHead()->Origin(origin);
} else if (!self->mInputFrameID) {
// ID 0 streams must supply their own origin
if (origin.IsEmpty()) {
LOG(("Http2Session %p Alt-Svc Stream 0 has empty origin\n", self));
self->ResetDownstreamState();
return NS_OK;
}
} else {
// handling of push streams is not defined. Let's ignore it
LOG(("Http2Session %p Alt-Svc received on pushed stream - ignoring\n", self));
self->ResetDownstreamState();
return NS_OK;
}
RefPtr<nsHttpConnectionInfo> ci(self->ConnectionInfo());
if (!self->mConnection || !ci) {
LOG3(("Http2Session::RecvAltSvc %p no connection or conninfo for %d", self,
self->mInputFrameID));
self->ResetDownstreamState();
return NS_OK;
}
if (!impliedOrigin) {
bool okToReroute = true;
nsCOMPtr<nsISupports> securityInfo;
self->mConnection->GetSecurityInfo(getter_AddRefs(securityInfo));
nsCOMPtr<nsISSLSocketControl> ssl = do_QueryInterface(securityInfo);
if (!ssl) {
okToReroute = false;
}
// a little off main thread origin parser. This is a non critical function because
// any alternate route created has to be verified anyhow
nsAutoCString specifiedOriginHost;
if (origin.EqualsIgnoreCase("https://", 8)) {
specifiedOriginHost.Assign(origin.get() + 8, origin.Length() - 8);
} else if (origin.EqualsIgnoreCase("http://", 7)) {
specifiedOriginHost.Assign(origin.get() + 7, origin.Length() - 7);
}
int32_t colonOffset = specifiedOriginHost.FindCharInSet(":", 0);
if (colonOffset != kNotFound) {
specifiedOriginHost.Truncate(colonOffset);
}
if (okToReroute) {
ssl->IsAcceptableForHost(specifiedOriginHost, &okToReroute);
}
if (!okToReroute) {
LOG3(("Http2Session::RecvAltSvc %p can't reroute non-authoritative origin %s",
self, origin.BeginReading()));
self->ResetDownstreamState();
return NS_OK;
}
}
nsCOMPtr<nsISupports> callbacks;
self->mConnection->GetSecurityInfo(getter_AddRefs(callbacks));
nsCOMPtr<nsIInterfaceRequestor> irCallbacks = do_QueryInterface(callbacks);
RefPtr<UpdateAltSvcEvent> event =
new UpdateAltSvcEvent(altSvcFieldValue, origin, ci, irCallbacks);
NS_DispatchToMainThread(event);
self->ResetDownstreamState();
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsAHttpTransaction. It is expected that nsHttpConnection is the caller
// of these methods
//-----------------------------------------------------------------------------
void
Http2Session::OnTransportStatus(nsITransport* aTransport,
nsresult aStatus, int64_t aProgress)
{
MOZ_ASSERT(PR_GetCurrentThread() == gSocketThread);
switch (aStatus) {
// These should appear only once, deliver to the first
// transaction on the session.
case NS_NET_STATUS_RESOLVING_HOST:
case NS_NET_STATUS_RESOLVED_HOST:
case NS_NET_STATUS_CONNECTING_TO:
case NS_NET_STATUS_CONNECTED_TO:
case NS_NET_STATUS_TLS_HANDSHAKE_STARTING:
case NS_NET_STATUS_TLS_HANDSHAKE_ENDED:
{
Http2Stream *target = mStreamIDHash.Get(1);
if (!target) {
// any transaction will do if we can't find the low numbered one
// generally this happens when the initial transaction hasn't been
// assigned a stream id yet.
auto iter = mStreamTransactionHash.Iter();
if (!iter.Done()) {
target = iter.Data();
}
}
nsAHttpTransaction *transaction = target ? target->Transaction() : nullptr;
if (transaction)
transaction->OnTransportStatus(aTransport, aStatus, aProgress);
break;
}
default:
// The other transport events are ignored here because there is no good
// way to map them to the right transaction in http/2. Instead, the events
// are generated again from the http/2 code and passed directly to the
// correct transaction.
// NS_NET_STATUS_SENDING_TO:
// This is generated by the socket transport when (part) of
// a transaction is written out
//
// There is no good way to map it to the right transaction in http/2,
// so it is ignored here and generated separately when the request
// is sent from Http2Stream::TransmitFrame
// NS_NET_STATUS_WAITING_FOR:
// Created by nsHttpConnection when the request has been totally sent.
// There is no good way to map it to the right transaction in http/2,
// so it is ignored here and generated separately when the same
// condition is complete in Http2Stream when there is no more
// request body left to be transmitted.
// NS_NET_STATUS_RECEIVING_FROM
// Generated in session whenever we read a data frame or a HEADERS
// that can be attributed to a particular stream/transaction
break;
}
}
// ReadSegments() is used to write data to the network. Generally, HTTP
// request data is pulled from the approriate transaction and
// converted to http/2 data. Sometimes control data like window-update are
// generated instead.
nsresult
Http2Session::ReadSegmentsAgain(nsAHttpSegmentReader *reader,
uint32_t count, uint32_t *countRead, bool *again)
{
MOZ_ASSERT(PR_GetCurrentThread() == gSocketThread);
MOZ_ASSERT(!mSegmentReader || !reader || (mSegmentReader == reader),
"Inconsistent Write Function Callback");
nsresult rv = ConfirmTLSProfile();
if (NS_FAILED(rv)) {
if (mGoAwayReason == INADEQUATE_SECURITY) {
LOG3(("Http2Session::ReadSegments %p returning INADEQUATE_SECURITY %x",
this, NS_ERROR_NET_INADEQUATE_SECURITY));
rv = NS_ERROR_NET_INADEQUATE_SECURITY;
}
return rv;
}
if (reader)
mSegmentReader = reader;
*countRead = 0;
LOG3(("Http2Session::ReadSegments %p", this));
Http2Stream *stream = static_cast<Http2Stream *>(mReadyForWrite.PopFront());
if (!stream) {
LOG3(("Http2Session %p could not identify a stream to write; suspending.",
this));
uint32_t availBeforeFlush = mOutputQueueUsed - mOutputQueueSent;
FlushOutputQueue();
uint32_t availAfterFlush = mOutputQueueUsed - mOutputQueueSent;
if (availBeforeFlush != availAfterFlush) {
LOG3(("Http2Session %p ResumeRecv After early flush in ReadSegments", this));
Unused << ResumeRecv();
}
SetWriteCallbacks();
if (mAttemptingEarlyData) {
// We can still try to send our preamble as early-data
*countRead = mOutputQueueUsed - mOutputQueueSent;
}
return *countRead ? NS_OK : NS_BASE_STREAM_WOULD_BLOCK;
}
uint32_t earlyDataUsed = 0;
if (mAttemptingEarlyData) {
if (!stream->Do0RTT()) {
LOG3(("Http2Session %p will not get early data from Http2Stream %p 0x%X",
this, stream, stream->StreamID()));
FlushOutputQueue();
SetWriteCallbacks();
// We can still send our preamble
*countRead = mOutputQueueUsed - mOutputQueueSent;
return *countRead ? NS_OK : NS_BASE_STREAM_WOULD_BLOCK;
}
if (!m0RTTStreams.Contains(stream->StreamID())) {
m0RTTStreams.AppendElement(stream->StreamID());
}
// Need to adjust this to only take as much as we can fit in with the
// preamble/settings/priority stuff
count -= (mOutputQueueUsed - mOutputQueueSent);