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Attachment 509492 Details for
Bug 623948
[patch]
syn retry v1
623948-syn-retry-redux.1 (text/plain), 59.10 KB, created by
Patrick McManus [:mcmanus]
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hide
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Description:
syn retry v1
Filename:
MIME Type:
Creator:
Patrick McManus [:mcmanus]
Size:
59.10 KB
patch
obsolete
># HG changeset patch ># Parent 5212ab4ae8082122ad57b5e8bc8015fb25814f68 >Accelerate TCP connection retries in HTTP > >Losing a TCP SYN requires a long painful (typically 3 second) delay >before being retried. This patch creates a second parallel connection >attempt for any nsHttpConnection which has not become writable before >a timeout occurs. > >If you assume .5% packet loss, this converts a full 3 second delay >from a 1 in 200 event into a 1 in 40,000 event. > >Whichever connection establishes itself first is used. If another one >has been started and it does connect before the one being used is >closed then the extra one is handed to the connection manager for use >by a different transaction - essentially a persistent connection with >0 previous transactions on it. (Another way to think about is >pre-fetching a 3WHS on a high latency connection). > >The pref network.http.connection-retry-timeout controls the amount of >time in ms to wait for success on the initial connection before beginning >the second one. Setting it to 0 disables the parallel connection, the >default is 250. > >This patch also reorganizes tcp connections to be driven from the >connection manager instead of nshttpconnection. This allows a >transaction that opens a new tcp connection to actually reschedule >itself onto a persistent connection that becomes available only after >the open has happened. > >diff --git a/modules/libpref/src/init/all.js b/modules/libpref/src/init/all.js >--- a/modules/libpref/src/init/all.js >+++ b/modules/libpref/src/init/all.js >@@ -743,16 +743,21 @@ pref("network.http.prompt-temp-redirect" > // for certain services (i.e. EF for VoIP, AF4x for interactive video, > // AF3x for broadcast/streaming video, etc) > > // default value for HTTP > // in a DSCP environment this should be 40 (0x28, or AF11), per RFC-4594, > // Section 4.8 "High-Throughput Data Service Class" > pref("network.http.qos", 0); > >+// The number of milliseconds after sending a SYN for an HTTP connection, >+// to wait before trying a different connection. 0 means do not use a second >+// connection. >+pref("network.http.connection-retry-timeout", 250); >+ > // default values for FTP > // in a DSCP environment this should be 40 (0x28, or AF11), per RFC-4594, > // Section 4.8 "High-Throughput Data Service Class", and 80 (0x50, or AF22) > // per Section 4.7 "Low-Latency Data Service Class". > pref("network.ftp.data.qos", 0); > pref("network.ftp.control.qos", 0); > > // </http> >diff --git a/netwerk/base/src/nsSocketTransport2.cpp b/netwerk/base/src/nsSocketTransport2.cpp >--- a/netwerk/base/src/nsSocketTransport2.cpp >+++ b/netwerk/base/src/nsSocketTransport2.cpp >@@ -1773,19 +1773,30 @@ nsSocketTransport::GetSecurityCallbacks( > nsAutoLock lock(mLock); > NS_IF_ADDREF(*callbacks = mCallbacks); > return NS_OK; > } > > NS_IMETHODIMP > nsSocketTransport::SetSecurityCallbacks(nsIInterfaceRequestor *callbacks) > { >- nsAutoLock lock(mLock); >- mCallbacks = callbacks; >- // XXX should we tell PSM about this? >+ nsCOMPtr<nsISupports> secinfo; >+ { >+ nsAutoLock lock(mLock); >+ mCallbacks = callbacks; >+ SOCKET_LOG(("Reset callbacks for secinfo=%p callbacks=%p\n", mSecInfo.get(), mCallbacks.get())); >+ >+ secinfo = mSecInfo; >+ } >+ >+ // don't call into PSM while holding mLock!! >+ nsCOMPtr<nsISSLSocketControl> secCtrl(do_QueryInterface(secinfo)); >+ if (secCtrl) >+ secCtrl->SetNotificationCallbacks(callbacks); >+ > return NS_OK; > } > > NS_IMETHODIMP > nsSocketTransport::SetEventSink(nsITransportEventSink *sink, > nsIEventTarget *target) > { > nsCOMPtr<nsITransportEventSink> temp; >diff --git a/netwerk/protocol/http/nsAHttpTransaction.h b/netwerk/protocol/http/nsAHttpTransaction.h >--- a/netwerk/protocol/http/nsAHttpTransaction.h >+++ b/netwerk/protocol/http/nsAHttpTransaction.h >@@ -39,16 +39,17 @@ > #define nsAHttpTransaction_h__ > > #include "nsISupports.h" > > class nsAHttpConnection; > class nsAHttpSegmentReader; > class nsAHttpSegmentWriter; > class nsIInterfaceRequestor; >+class nsIEventTarget; > > //---------------------------------------------------------------------------- > // Abstract base class for a HTTP transaction: > // > // A transaction is a "sink" for the response data. The connection pushes > // data to the transaction by writing to it. The transaction supports > // WriteSegments and may refuse to accept data if its buffers are full (its > // write function returns NS_BASE_STREAM_WOULD_BLOCK in this case). >@@ -57,17 +58,18 @@ class nsIInterfaceRequestor; > class nsAHttpTransaction : public nsISupports > { > public: > // called by the connection when it takes ownership of the transaction. > virtual void SetConnection(nsAHttpConnection *) = 0; > > // called by the connection to get security callbacks to set on the > // socket transport. >- virtual void GetSecurityCallbacks(nsIInterfaceRequestor **) = 0; >+ virtual void GetSecurityCallbacks(nsIInterfaceRequestor **, >+ nsIEventTarget **) = 0; > > // called to report socket status (see nsITransportEventSink) > virtual void OnTransportStatus(nsresult status, PRUint64 progress) = 0; > > // called to check the transaction status. > virtual PRBool IsDone() = 0; > virtual nsresult Status() = 0; > >@@ -83,17 +85,18 @@ public: > PRUint32 count, PRUint32 *countWritten) = 0; > > // called to close the transaction > virtual void Close(nsresult reason) = 0; > }; > > #define NS_DECL_NSAHTTPTRANSACTION \ > void SetConnection(nsAHttpConnection *); \ >- void GetSecurityCallbacks(nsIInterfaceRequestor **); \ >+ void GetSecurityCallbacks(nsIInterfaceRequestor **, \ >+ nsIEventTarget **); \ > void OnTransportStatus(nsresult status, PRUint64 progress); \ > PRBool IsDone(); \ > nsresult Status(); \ > PRUint32 Available(); \ > nsresult ReadSegments(nsAHttpSegmentReader *, PRUint32, PRUint32 *); \ > nsresult WriteSegments(nsAHttpSegmentWriter *, PRUint32, PRUint32 *); \ > void Close(nsresult reason); > >diff --git a/netwerk/protocol/http/nsHttpConnection.cpp b/netwerk/protocol/http/nsHttpConnection.cpp >--- a/netwerk/protocol/http/nsHttpConnection.cpp >+++ b/netwerk/protocol/http/nsHttpConnection.cpp >@@ -46,32 +46,32 @@ > #include "nsISocketTransportService.h" > #include "nsISocketTransport.h" > #include "nsIServiceManager.h" > #include "nsISSLSocketControl.h" > #include "nsStringStream.h" > #include "netCore.h" > #include "nsNetCID.h" > #include "nsAutoLock.h" >+#include "nsProxyRelease.h" > #include "prmem.h" > > #ifdef DEBUG > // defined by the socket transport service while active > extern PRThread *gSocketThread; > #endif > > static NS_DEFINE_CID(kSocketTransportServiceCID, NS_SOCKETTRANSPORTSERVICE_CID); > > //----------------------------------------------------------------------------- > // nsHttpConnection <public> > //----------------------------------------------------------------------------- > > nsHttpConnection::nsHttpConnection() > : mTransaction(nsnull) >- , mConnInfo(nsnull) > , mLastReadTime(0) > , mIdleTimeout(0) > , mKeepAlive(PR_TRUE) // assume to keep-alive by default > , mKeepAliveMask(PR_TRUE) > , mSupportsPipelining(PR_FALSE) // assume low-grade server > , mIsReused(PR_FALSE) > , mCompletedSSLConnect(PR_FALSE) > , mLastTransactionExpectedNoContent(PR_FALSE) >@@ -81,90 +81,102 @@ nsHttpConnection::nsHttpConnection() > // grab a reference to the handler to ensure that it doesn't go away. > nsHttpHandler *handler = gHttpHandler; > NS_ADDREF(handler); > } > > nsHttpConnection::~nsHttpConnection() > { > LOG(("Destroying nsHttpConnection @%x\n", this)); >- >- NS_IF_RELEASE(mConnInfo); >- NS_IF_RELEASE(mTransaction); >+ >+ if (mCallbacks) { >+ nsIInterfaceRequestor *cbs = nsnull; >+ mCallbacks.swap(cbs); >+ NS_ProxyRelease(mCallbackTarget, cbs); >+ } > > // release our reference to the handler > nsHttpHandler *handler = gHttpHandler; > NS_RELEASE(handler); > } > > nsresult >-nsHttpConnection::Init(nsHttpConnectionInfo *info, PRUint16 maxHangTime) >+nsHttpConnection::Init(nsHttpConnectionInfo *info, PRUint16 maxHangTime, >+ nsISocketTransport *transport, nsIAsyncInputStream *instream, >+ nsIAsyncOutputStream *outstream, >+ nsIInterfaceRequestor *callbacks, >+ nsIEventTarget *callbackTarget) >+ >+ > { >+ NS_ABORT_IF_FALSE (transport && instream && outstream, "init precond"); > LOG(("nsHttpConnection::Init [this=%x]\n", this)); > > NS_ENSURE_ARG_POINTER(info); > NS_ENSURE_TRUE(!mConnInfo, NS_ERROR_ALREADY_INITIALIZED); > > mConnInfo = info; >- NS_ADDREF(mConnInfo); >- > mMaxHangTime = maxHangTime; > mLastReadTime = NowInSeconds(); >+ >+ mSocketTransport = transport; >+ mSocketIn = instream; >+ mSocketOut = outstream; >+ nsresult rv = mSocketTransport->SetEventSink(this, nsnull); >+ NS_ENSURE_SUCCESS(rv, rv); >+ mCallbacks = callbacks; >+ mCallbackTarget = callbackTarget; >+ rv = mSocketTransport->SetSecurityCallbacks(this); >+ NS_ENSURE_SUCCESS(rv, rv); >+ > return NS_OK; > } > > // called on the socket thread > nsresult > nsHttpConnection::Activate(nsAHttpTransaction *trans, PRUint8 caps) > { > nsresult rv; > >+ NS_ABORT_IF_FALSE(PR_GetCurrentThread() == gSocketThread, "wrong thread"); > LOG(("nsHttpConnection::Activate [this=%x trans=%x caps=%x]\n", > this, trans, caps)); > > NS_ENSURE_ARG_POINTER(trans); > NS_ENSURE_TRUE(!mTransaction, NS_ERROR_IN_PROGRESS); > > // take ownership of the transaction > mTransaction = trans; >- NS_ADDREF(mTransaction); > > // set mKeepAlive according to what will be requested > mKeepAliveMask = mKeepAlive = (caps & NS_HTTP_ALLOW_KEEPALIVE); > >- // if we don't have a socket transport then create a new one >- if (!mSocketTransport) { >- rv = CreateTransport(caps); >- if (NS_FAILED(rv)) >- goto loser; >- } >- > // need to handle SSL proxy CONNECT if this is the first time. > if (mConnInfo->UsingSSL() && mConnInfo->UsingHttpProxy() && !mCompletedSSLConnect) { > rv = SetupSSLProxyConnect(); > if (NS_FAILED(rv)) >- goto loser; >+ goto failed_activation; > } > >- // wait for the output stream to be readable >- rv = mSocketOut->AsyncWait(this, 0, 0, nsnull); >- if (NS_SUCCEEDED(rv)) >- return rv; >+ rv = OnOutputStreamReady(mSocketOut); >+ >+failed_activation: >+ if (NS_FAILED(rv)) { >+ mTransaction = nsnull; >+ } > >-loser: >- NS_RELEASE(mTransaction); > return rv; > } > > void > nsHttpConnection::Close(nsresult reason) > { > LOG(("nsHttpConnection::Close [this=%x reason=%x]\n", this, reason)); > >- NS_ASSERTION(PR_GetCurrentThread() == gSocketThread, "wrong thread"); >+ NS_ABORT_IF_FALSE(PR_GetCurrentThread() == gSocketThread, "wrong thread"); > > if (NS_FAILED(reason)) { > if (mSocketTransport) { > mSocketTransport->SetSecurityCallbacks(nsnull); > mSocketTransport->SetEventSink(nsnull, nsnull); > mSocketTransport->Close(reason); > } > mKeepAlive = PR_FALSE; >@@ -382,17 +394,17 @@ nsHttpConnection::OnHeadersAvailable(nsA > NS_ASSERTION(NS_SUCCEEDED(rv), "mSocketOut->AsyncWait failed"); > } > else { > LOG(("SSL proxy CONNECT failed!\n")); > // NOTE: this cast is valid since this connection cannot be > // processing a transaction pipeline until after the first HTTP/1.1 > // response. > nsHttpTransaction *trans = >- static_cast<nsHttpTransaction *>(mTransaction); >+ static_cast<nsHttpTransaction *>(mTransaction.get()); > trans->SetSSLConnectFailed(); > } > } > > return NS_OK; > } > > void >@@ -433,96 +445,31 @@ nsHttpConnection::ResumeRecv() > NS_NOTREACHED("no socket input stream"); > return NS_ERROR_UNEXPECTED; > } > > //----------------------------------------------------------------------------- > // nsHttpConnection <private> > //----------------------------------------------------------------------------- > >-nsresult >-nsHttpConnection::CreateTransport(PRUint8 caps) >-{ >- nsresult rv; >- >- NS_PRECONDITION(!mSocketTransport, "unexpected"); >- >- nsCOMPtr<nsISocketTransportService> sts = >- do_GetService(NS_SOCKETTRANSPORTSERVICE_CONTRACTID, &rv); >- if (NS_FAILED(rv)) return rv; >- >- // configure the socket type based on the connection type requested. >- const char* types[1]; >- >- if (mConnInfo->UsingSSL()) >- types[0] = "ssl"; >- else >- types[0] = gHttpHandler->DefaultSocketType(); >- >- nsCOMPtr<nsISocketTransport> strans; >- PRUint32 typeCount = (types[0] != nsnull); >- >- rv = sts->CreateTransport(types, typeCount, >- nsDependentCString(mConnInfo->Host()), >- mConnInfo->Port(), >- mConnInfo->ProxyInfo(), >- getter_AddRefs(strans)); >- if (NS_FAILED(rv)) return rv; >- >- PRUint32 tmpFlags = 0; >- if (caps & NS_HTTP_REFRESH_DNS) >- tmpFlags = nsISocketTransport::BYPASS_CACHE; >- >- if (caps & NS_HTTP_LOAD_ANONYMOUS) >- tmpFlags |= nsISocketTransport::ANONYMOUS_CONNECT; >- >- strans->SetConnectionFlags(tmpFlags); >- >- strans->SetQoSBits(gHttpHandler->GetQoSBits()); >- >- // NOTE: these create cyclical references, which we break inside >- // nsHttpConnection::Close >- rv = strans->SetEventSink(this, nsnull); >- if (NS_FAILED(rv)) return rv; >- rv = strans->SetSecurityCallbacks(this); >- if (NS_FAILED(rv)) return rv; >- >- // next open the socket streams >- nsCOMPtr<nsIOutputStream> sout; >- rv = strans->OpenOutputStream(nsITransport::OPEN_UNBUFFERED, 0, 0, >- getter_AddRefs(sout)); >- if (NS_FAILED(rv)) return rv; >- nsCOMPtr<nsIInputStream> sin; >- rv = strans->OpenInputStream(nsITransport::OPEN_UNBUFFERED, 0, 0, >- getter_AddRefs(sin)); >- if (NS_FAILED(rv)) return rv; >- >- mSocketTransport = strans; >- mSocketIn = do_QueryInterface(sin); >- mSocketOut = do_QueryInterface(sout); >- return NS_OK; >-} >- > void > nsHttpConnection::CloseTransaction(nsAHttpTransaction *trans, nsresult reason) > { > LOG(("nsHttpConnection::CloseTransaction[this=%x trans=%x reason=%x]\n", > this, trans, reason)); > > NS_ASSERTION(trans == mTransaction, "wrong transaction"); > NS_ASSERTION(PR_GetCurrentThread() == gSocketThread, "wrong thread"); > > // mask this error code because its not a real error. > if (reason == NS_BASE_STREAM_CLOSED) > reason = NS_OK; > > mTransaction->Close(reason); >- >- NS_RELEASE(mTransaction); >- mTransaction = 0; >+ mTransaction = nsnull; > > if (NS_FAILED(reason)) > Close(reason); > > // flag the connection as reused here for convenience sake. certainly > // it might be going away instead ;-) > mIsReused = PR_TRUE; > } >@@ -723,17 +670,18 @@ nsHttpConnection::SetupSSLProxyConnect() > request.SetRequestURI(buf); > request.SetHeader(nsHttp::User_Agent, gHttpHandler->UserAgent()); > > // send this header for backwards compatibility. > request.SetHeader(nsHttp::Proxy_Connection, NS_LITERAL_CSTRING("keep-alive")); > > // NOTE: this cast is valid since this connection cannot be processing a > // transaction pipeline until after the first HTTP/1.1 response. >- nsHttpTransaction *trans = static_cast<nsHttpTransaction *>(mTransaction); >+ nsHttpTransaction *trans = >+ static_cast<nsHttpTransaction *>(mTransaction.get()); > > val = trans->RequestHead()->PeekHeader(nsHttp::Host); > if (val) { > // all HTTP/1.1 requests must include a Host header (even though it > // may seem redundant in this case; see bug 82388). > request.SetHeader(nsHttp::Host, nsDependentCString(val)); > } > >@@ -787,18 +735,18 @@ nsHttpConnection::OnInputStreamReady(nsI > > //----------------------------------------------------------------------------- > // nsHttpConnection::nsIOutputStreamCallback > //----------------------------------------------------------------------------- > > NS_IMETHODIMP > nsHttpConnection::OnOutputStreamReady(nsIAsyncOutputStream *out) > { >- NS_ASSERTION(out == mSocketOut, "unexpected stream"); >- NS_ASSERTION(PR_GetCurrentThread() == gSocketThread, "wrong thread"); >+ NS_ABORT_IF_FALSE(PR_GetCurrentThread() == gSocketThread, "wrong thread"); >+ NS_ABORT_IF_FALSE(out == mSocketOut, "unexpected socket"); > > // if the transaction was dropped... > if (!mTransaction) { > LOG((" no transaction; ignoring event\n")); > return NS_OK; > } > > nsresult rv = OnSocketWritable(); >@@ -830,19 +778,19 @@ nsHttpConnection::OnTransportStatus(nsIT > // not called on the socket transport thread > NS_IMETHODIMP > nsHttpConnection::GetInterface(const nsIID &iid, void **result) > { > // NOTE: This function is only called on the UI thread via sync proxy from > // the socket transport thread. If that weren't the case, then we'd > // have to worry about the possibility of mTransaction going away > // part-way through this function call. See CloseTransaction. >+ >+ // NOTE - there is a bug here, the call to getinterface is proxied off the >+ // nss thread, not the ui thread as the above comment says. So there is >+ // indeed a chance of mTransaction going away. bug 615342 >+ > NS_ASSERTION(PR_GetCurrentThread() != gSocketThread, "wrong thread"); >- >- if (mTransaction) { >- nsCOMPtr<nsIInterfaceRequestor> callbacks; >- mTransaction->GetSecurityCallbacks(getter_AddRefs(callbacks)); >- if (callbacks) >- return callbacks->GetInterface(iid, result); >- } > >+ if (mCallbacks) >+ return mCallbacks->GetInterface(iid, result); > return NS_ERROR_NO_INTERFACE; > } >diff --git a/netwerk/protocol/http/nsHttpConnection.h b/netwerk/protocol/http/nsHttpConnection.h >--- a/netwerk/protocol/http/nsHttpConnection.h >+++ b/netwerk/protocol/http/nsHttpConnection.h >@@ -48,16 +48,17 @@ > #include "prlock.h" > #include "nsAutoPtr.h" > > #include "nsIStreamListener.h" > #include "nsISocketTransport.h" > #include "nsIAsyncInputStream.h" > #include "nsIAsyncOutputStream.h" > #include "nsIInterfaceRequestor.h" >+#include "nsIEventTarget.h" > > //----------------------------------------------------------------------------- > // 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. > //----------------------------------------------------------------------------- > >@@ -80,17 +81,20 @@ public: > nsHttpConnection(); > virtual ~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. >- nsresult Init(nsHttpConnectionInfo *info, PRUint16 maxHangTime); >+ nsresult Init(nsHttpConnectionInfo *info, PRUint16 maxHangTime, >+ nsISocketTransport *, nsIAsyncInputStream *, >+ nsIAsyncOutputStream *, nsIInterfaceRequestor *, >+ nsIEventTarget *); > > // Activate causes the given transaction to be processed on this > // connection. It fails if there is already an existing transaction. > nsresult Activate(nsAHttpTransaction *, PRUint8 caps); > > // Close the underlying socket transport. > void Close(nsresult reason); > >@@ -124,28 +128,29 @@ public: > > // nsAHttpConnection compatible methods (non-virtual): > nsresult OnHeadersAvailable(nsAHttpTransaction *, nsHttpRequestHead *, nsHttpResponseHead *, PRBool *reset); > void CloseTransaction(nsAHttpTransaction *, nsresult reason); > void GetConnectionInfo(nsHttpConnectionInfo **ci) { NS_IF_ADDREF(*ci = mConnInfo); } > void GetSecurityInfo(nsISupports **); > PRBool IsPersistent() { return IsKeepAlive(); } > PRBool IsReused() { return mIsReused; } >+ void SetIsReused(PRBool val) {mIsReused = val;} >+ void SetIdleTimeout(PRUint16 val) {mIdleTimeout = val;} > nsresult PushBack(const char *data, PRUint32 length) { NS_NOTREACHED("PushBack"); return NS_ERROR_UNEXPECTED; } > nsresult ResumeSend(); > nsresult ResumeRecv(); > > static NS_METHOD ReadFromStream(nsIInputStream *, void *, const char *, > PRUint32, PRUint32, PRUint32 *); > > private: > // called to cause the underlying socket to start speaking SSL > nsresult ProxyStartSSL(); > >- nsresult CreateTransport(PRUint8 caps); > nsresult OnTransactionDone(nsresult reason); > nsresult OnSocketWritable(); > nsresult OnSocketReadable(); > > nsresult SetupSSLProxyConnect(); > > PRBool IsAlive(); > PRBool SupportsPipelining(nsHttpResponseHead *); >@@ -156,18 +161,24 @@ private: > nsCOMPtr<nsIAsyncOutputStream> mSocketOut; > > nsresult mSocketInCondition; > nsresult mSocketOutCondition; > > nsCOMPtr<nsIInputStream> mSSLProxyConnectStream; > nsCOMPtr<nsIInputStream> mRequestStream; > >- nsAHttpTransaction *mTransaction; // hard ref >- nsHttpConnectionInfo *mConnInfo; // hard ref >+ // mTransaction only points to the HTTP Transaction callbacks if the >+ // transaction is open, otherwise it is null. >+ nsRefPtr<nsAHttpTransaction> mTransaction; >+ >+ nsCOMPtr<nsIInterfaceRequestor> mCallbacks; >+ nsCOMPtr<nsIEventTarget> mCallbackTarget; >+ >+ nsRefPtr<nsHttpConnectionInfo> mConnInfo; > > PRUint32 mLastReadTime; > PRUint16 mMaxHangTime; // max download time before dropping keep-alive status > PRUint16 mIdleTimeout; // value of keep-alive: timeout= > > PRPackedBool mKeepAlive; > PRPackedBool mKeepAliveMask; > PRPackedBool mSupportsPipelining; >diff --git a/netwerk/protocol/http/nsHttpConnectionMgr.cpp b/netwerk/protocol/http/nsHttpConnectionMgr.cpp >--- a/netwerk/protocol/http/nsHttpConnectionMgr.cpp >+++ b/netwerk/protocol/http/nsHttpConnectionMgr.cpp >@@ -109,16 +109,20 @@ nsHttpConnectionMgr::EnsureSocketThreadT > nsCOMPtr<nsIEventTarget> sts; > nsCOMPtr<nsIIOService> ioService = do_GetIOService(&rv); > if (NS_SUCCEEDED(rv)) { > PRBool offline = PR_TRUE; > ioService->GetOffline(&offline); > > if (!offline) { > sts = do_GetService(NS_SOCKETTRANSPORTSERVICE_CONTRACTID, &rv); >+ if (!mSTS && sts) { >+ mSTS = do_QueryInterface(sts); >+ NS_ABORT_IF_FALSE(mSTS.get(), "nonsensical failed qi"); >+ } > } > } > > nsAutoMonitor mon(mMonitor); > > // do nothing if already initialized or if we've shut down > if (mSocketThreadTarget || mIsShuttingDown) > return NS_OK; >@@ -395,34 +399,40 @@ nsHttpConnectionMgr::ProcessOneTransacti > nsConnectionEntry *ent = (nsConnectionEntry *) data; > > if (self->ProcessPendingQForEntry(ent)) > return kHashEnumerateStop; > > return kHashEnumerateNext; > } > >+// If the global number of idle connections is preventing the opening of >+// new connections to a host without idle connections, then >+// close them regardless of their TTL > PRIntn >-nsHttpConnectionMgr::PurgeOneIdleConnectionCB(nsHashKey *key, void *data, void *closure) >+nsHttpConnectionMgr::PurgeExcessIdleConnectionsCB(nsHashKey *key, >+ void *data, void *closure) > { > nsHttpConnectionMgr *self = (nsHttpConnectionMgr *) closure; > nsConnectionEntry *ent = (nsConnectionEntry *) data; > >- if (ent->mIdleConns.Length() > 0) { >+ while (self->mNumIdleConns + self->mNumActiveConns + 1 >= self->mMaxConns) { >+ if (!ent->mIdleConns.Length()) { >+ // There are no idle conns left in this connection entry >+ return kHashEnumerateNext; >+ } > nsHttpConnection *conn = ent->mIdleConns[0]; > ent->mIdleConns.RemoveElementAt(0); > conn->Close(NS_ERROR_ABORT); > NS_RELEASE(conn); > self->mNumIdleConns--; > if (0 == self->mNumIdleConns) > self->StopPruneDeadConnectionsTimer(); >- return kHashEnumerateStop; > } >- >- return kHashEnumerateNext; >+ return kHashEnumerateStop; > } > > PRIntn > nsHttpConnectionMgr::PruneDeadConnectionsCB(nsHashKey *key, void *data, void *closure) > { > nsHttpConnectionMgr *self = (nsHttpConnectionMgr *) closure; > nsConnectionEntry *ent = (nsConnectionEntry *) data; > >@@ -469,16 +479,17 @@ nsHttpConnectionMgr::PruneDeadConnection > LOG((" active conn [%x] with trans [%x]\n", conn, conn->Transaction())); > } > } > #endif > > // if this entry is empty, then we can remove it. > if (ent->mIdleConns.Length() == 0 && > ent->mActiveConns.Length() == 0 && >+ ent->mHalfOpens.Length() == 0 && > ent->mPendingQ.Length() == 0) { > LOG((" removing empty connection entry\n")); > delete ent; > return kHashEnumerateRemove; > } > > // else, use this opportunity to compact our arrays... > ent->mIdleConns.Compact(); >@@ -528,16 +539,20 @@ nsHttpConnectionMgr::ShutdownPassCB(nsHa > trans = ent->mPendingQ[0]; > > ent->mPendingQ.RemoveElementAt(0); > > trans->Close(NS_ERROR_ABORT); > NS_RELEASE(trans); > } > >+ // close all half open tcp connections >+ for (PRInt32 i = ((PRInt32) ent->mHalfOpens.Length()) - 1; i >= 0; i--) >+ ent->mHalfOpens[i]->Abandon(); >+ > delete ent; > return kHashEnumerateRemove; > } > > //----------------------------------------------------------------------------- > > PRBool > nsHttpConnectionMgr::ProcessPendingQForEntry(nsConnectionEntry *ent) >@@ -547,17 +562,17 @@ nsHttpConnectionMgr::ProcessPendingQForE > > PRInt32 i, count = ent->mPendingQ.Length(); > if (count > 0) { > LOG((" pending-count=%u\n", count)); > nsHttpTransaction *trans = nsnull; > nsHttpConnection *conn = nsnull; > for (i=0; i<count; ++i) { > trans = ent->mPendingQ[i]; >- GetConnection(ent, trans->Caps(), &conn); >+ GetConnection(ent, trans, &conn); > if (conn) > break; > } > if (conn) { > LOG((" dispatching pending transaction...\n")); > > // remove pending transaction > ent->mPendingQ.RemoveElementAt(i); >@@ -587,18 +602,18 @@ nsHttpConnectionMgr::ProcessPendingQForE > PRBool > nsHttpConnectionMgr::AtActiveConnectionLimit(nsConnectionEntry *ent, PRUint8 caps) > { > nsHttpConnectionInfo *ci = ent->mConnInfo; > > LOG(("nsHttpConnectionMgr::AtActiveConnectionLimit [ci=%s caps=%x]\n", > ci->HashKey().get(), caps)); > >- // If we have more active connections than the limit, then we're done -- >- // purging idle connections won't get us below it. >+ // If there are more active connections than the global limit, then we're >+ // done. Purging idle connections won't get us below it. > if (mNumActiveConns >= mMaxConns) { > LOG((" num active conns == max conns\n")); > return PR_TRUE; > } > > nsHttpConnection *conn; > PRInt32 i, totalCount, persistCount = 0; > >@@ -606,16 +621,21 @@ nsHttpConnectionMgr::AtActiveConnectionL > > // count the number of persistent connections > for (i=0; i<totalCount; ++i) { > conn = ent->mActiveConns[i]; > if (conn->IsKeepAlive()) // XXX make sure this is thread-safe > persistCount++; > } > >+ // Add in the in-progress tcp connections, we will assume they are >+ // keepalive enabled. >+ totalCount += ent->mHalfOpens.Length(); >+ persistCount += ent->mHalfOpens.Length(); >+ > LOG((" total=%d, persist=%d\n", totalCount, persistCount)); > > PRUint16 maxConns; > PRUint16 maxPersistConns; > > if (ci->UsingHttpProxy() && !ci->UsingSSL()) { > maxConns = mMaxConnsPerProxy; > maxPersistConns = mMaxPersistConnsPerProxy; >@@ -626,28 +646,36 @@ nsHttpConnectionMgr::AtActiveConnectionL > } > > // use >= just to be safe > return (totalCount >= maxConns) || ( (caps & NS_HTTP_ALLOW_KEEPALIVE) && > (persistCount >= maxPersistConns) ); > } > > void >-nsHttpConnectionMgr::GetConnection(nsConnectionEntry *ent, PRUint8 caps, >+nsHttpConnectionMgr::GetConnection(nsConnectionEntry *ent, >+ nsHttpTransaction *trans, > nsHttpConnection **result) > { > LOG(("nsHttpConnectionMgr::GetConnection [ci=%s caps=%x]\n", >- ent->mConnInfo->HashKey().get(), PRUint32(caps))); >+ ent->mConnInfo->HashKey().get(), PRUint32(trans->Caps()))); >+ >+ // First, see if an idle persistent connection may be reused instead of >+ // establishing a new socket. We do not need to check the connection limits >+ // yet as they govern the maximum number of open connections and reusing >+ // an old connection never increases that. > > *result = nsnull; > > nsHttpConnection *conn = nsnull; > >- if (caps & NS_HTTP_ALLOW_KEEPALIVE) { >- // search the idle connection list >+ if (trans->Caps() & NS_HTTP_ALLOW_KEEPALIVE) { >+ // search the idle connection list. Each element in the list >+ // has a reference, so if we remove it from the list into a local >+ // ptr, that ptr now owns the reference > while (!conn && (ent->mIdleConns.Length() > 0)) { > conn = ent->mIdleConns[0]; > // we check if the connection can be reused before even checking if > // it is a "matching" connection. > if (!conn->CanReuse()) { > LOG((" dropping stale connection: [conn=%x]\n", conn)); > conn->Close(NS_ERROR_ABORT); > NS_RELEASE(conn); >@@ -667,41 +695,77 @@ nsHttpConnectionMgr::GetConnection(nsCon > if (!conn) { > // Check if we need to purge an idle connection. Note that we may have > // removed one above; if so, this will be a no-op. We do this before > // checking the active connection limit to catch the case where we do > // have an idle connection, but the purge timer hasn't fired yet. > // XXX this just purges a random idle connection. we should instead > // enumerate the entire hash table to find the eldest idle connection. > if (mNumIdleConns && mNumIdleConns + mNumActiveConns + 1 >= mMaxConns) >- mCT.Enumerate(PurgeOneIdleConnectionCB, this); >+ mCT.Enumerate(PurgeExcessIdleConnectionsCB, this); > > // Need to make a new TCP connection. First, we check if we've hit > // either the maximum connection limit globally or for this particular > // host or proxy. If we have, we're done. >- if (AtActiveConnectionLimit(ent, caps)) { >- LOG((" at active connection limit!\n")); >+ if (AtActiveConnectionLimit(ent, trans->Caps())) { >+ LOG((" at active connection limit - will queue\n")); > return; > } > >- conn = new nsHttpConnection(); >- if (!conn) >- return; >- NS_ADDREF(conn); >- >- nsresult rv = conn->Init(ent->mConnInfo, mMaxRequestDelay); >- if (NS_FAILED(rv)) { >- NS_RELEASE(conn); >- return; >- } >+ nsresult rv = CreateTransport(ent, trans); >+ if (NS_FAILED(rv)) >+ trans->Close(rv); >+ return; > } > >+ // hold an owning ref to this connection >+ ent->mActiveConns.AppendElement(conn); >+ mNumActiveConns++; >+ NS_ADDREF(conn); >+ > *result = conn; > } > >+void >+nsHttpConnectionMgr::AddActiveConn(nsHttpConnection *conn, >+ nsConnectionEntry *ent) >+{ >+ NS_ADDREF(conn); >+ ent->mActiveConns.AppendElement(conn); >+ mNumActiveConns++; >+} >+ >+void >+nsHttpConnectionMgr::StartedConnect() >+{ >+ mNumActiveConns++; >+} >+ >+void >+nsHttpConnectionMgr::RecvdConnect() >+{ >+ mNumActiveConns--; >+} >+ >+nsresult >+nsHttpConnectionMgr::CreateTransport(nsConnectionEntry *ent, >+ nsHttpTransaction *trans) >+{ >+ NS_ABORT_IF_FALSE(PR_GetCurrentThread() == gSocketThread, "wrong thread"); >+ NS_ABORT_IF_FALSE (mSTS, "no socket transport?"); >+ >+ nsRefPtr<nsHalfOpenSocket> sock = new nsHalfOpenSocket(ent, this, trans); >+ nsresult rv = sock->SetupPrimaryStreams(); >+ NS_ENSURE_SUCCESS(rv, rv); >+ StartedConnect(); >+ sock->SetupBackupTimer(); >+ ent->mHalfOpens.AppendElement(sock); >+ return NS_OK; >+} >+ > nsresult > nsHttpConnectionMgr::DispatchTransaction(nsConnectionEntry *ent, > nsAHttpTransaction *trans, > PRUint8 caps, > nsHttpConnection *conn) > { > LOG(("nsHttpConnectionMgr::DispatchTransaction [ci=%s trans=%x caps=%x conn=%x]\n", > ent->mConnInfo->HashKey().get(), trans, caps, conn)); >@@ -713,21 +777,16 @@ nsHttpConnectionMgr::DispatchTransaction > > nsHttpPipeline *pipeline = nsnull; > if (conn->SupportsPipelining() && (caps & NS_HTTP_ALLOW_PIPELINING)) { > LOG((" looking to build pipeline...\n")); > if (BuildPipeline(ent, trans, &pipeline)) > trans = pipeline; > } > >- // hold an owning ref to this connection >- ent->mActiveConns.AppendElement(conn); >- mNumActiveConns++; >- NS_ADDREF(conn); >- > // give the transaction the indirect reference to the connection. > trans->SetConnection(handle); > > nsresult rv = conn->Activate(trans, caps); > > if (NS_FAILED(rv)) { > LOG((" conn->Activate failed [rv=%x]\n", rv)); > ent->mActiveConns.RemoveElement(conn); >@@ -790,16 +849,18 @@ nsHttpConnectionMgr::BuildPipeline(nsCon > LOG((" pipelined %u transactions\n", numAdded)); > NS_ADDREF(*result = pipeline); > return PR_TRUE; > } > > nsresult > nsHttpConnectionMgr::ProcessNewTransaction(nsHttpTransaction *trans) > { >+ NS_ABORT_IF_FALSE(PR_GetCurrentThread() == gSocketThread, "wrong thread"); >+ > // since "adds" and "cancels" are processed asynchronously and because > // various events might trigger an "add" directly on the socket thread, > // we must take care to avoid dispatching a transaction that has already > // been canceled (see bug 190001). > if (NS_FAILED(trans->Status())) { > LOG((" transaction was canceled... dropping event!\n")); > return NS_OK; > } >@@ -832,28 +893,19 @@ nsHttpConnectionMgr::ProcessNewTransacti > > // steal reference from connection handle. > // XXX prevent SetConnection(nsnull) from calling ReclaimConnection > conn = handle->mConn; > handle->mConn = nsnull; > > // destroy connection handle. > trans->SetConnection(nsnull); >- >- // remove sticky connection from active connection list; we'll add it >- // right back in DispatchTransaction. >- if (ent->mActiveConns.RemoveElement(conn)) >- mNumActiveConns--; >- else { >- NS_ERROR("sticky connection not found in active list"); >- return NS_ERROR_UNEXPECTED; >- } > } > else >- GetConnection(ent, caps, &conn); >+ GetConnection(ent, trans, &conn); > > nsresult rv; > if (!conn) { > LOG((" adding transaction to pending queue [trans=%x pending-count=%u]\n", > trans, ent->mPendingQ.Length()+1)); > // put this transaction on the pending queue... > InsertTransactionSorted(ent->mPendingQ, trans); > NS_ADDREF(trans); >@@ -993,38 +1045,45 @@ nsHttpConnectionMgr::OnMsgReclaimConnect > nsHttpConnectionInfo *ci = conn->ConnectionInfo(); > NS_ADDREF(ci); > > nsCStringKey key(ci->HashKey()); > nsConnectionEntry *ent = (nsConnectionEntry *) mCT.Get(&key); > > NS_ASSERTION(ent, "no connection entry"); > if (ent) { >- ent->mActiveConns.RemoveElement(conn); >- mNumActiveConns--; >+ // If the connection is in the active list, remove that entry >+ // and the reference held by the mActiveConns list. >+ // This is never the final reference on conn as the event context >+ // is also holding one that is released at the end of this function. >+ if (ent->mActiveConns.RemoveElement(conn)) { >+ nsHttpConnection *temp = conn; >+ NS_RELEASE(temp); >+ mNumActiveConns--; >+ } >+ > if (conn->CanReuse()) { > LOG((" adding connection to idle list\n")); > // hold onto this connection in the idle list. we push it to > // the end of the list so as to ensure that we'll visit older > // connections first before getting to this one. >+ NS_ADDREF(conn); > ent->mIdleConns.AppendElement(conn); > mNumIdleConns++; > // If the added connection was first idle connection or has shortest > // time to live among the idle connections, pruning dead > // connections needs to be done when it can't be reused anymore. > PRUint32 timeToLive = conn->TimeToLive(); > if(!mTimer || NowInSeconds() + timeToLive < mTimeOfNextWakeUp) > PruneDeadConnectionsAfter(timeToLive); > } > else { > LOG((" connection cannot be reused; closing connection\n")); > // make sure the connection is closed and release our reference. > conn->Close(NS_ERROR_ABORT); >- nsHttpConnection *temp = conn; >- NS_RELEASE(temp); > } > } > > OnMsgProcessPendingQ(NS_OK, ci); // releases |ci| > NS_RELEASE(conn); > } > > void >@@ -1125,16 +1184,274 @@ nsHttpConnectionMgr::nsConnectionHandle: > } > > nsresult > nsHttpConnectionMgr::nsConnectionHandle::PushBack(const char *buf, PRUint32 bufLen) > { > return mConn->PushBack(buf, bufLen); > } > >+ >+//////////////////////// nsHalfOpenSocket >+ >+ >+NS_IMPL_THREADSAFE_ISUPPORTS3(nsHttpConnectionMgr::nsHalfOpenSocket, >+ nsIOutputStreamCallback, >+ nsITransportEventSink, >+ nsIInterfaceRequestor) >+ >+nsHttpConnectionMgr::nsHalfOpenSocket::~nsHalfOpenSocket() >+{ >+ NS_ABORT_IF_FALSE(!mStreamOut, "streamout not null"); >+ NS_ABORT_IF_FALSE(!mBackupStreamOut, "backupstreamout not null"); >+ NS_ABORT_IF_FALSE(!mSynTimer, "syntimer not null"); >+ >+ if (mEnt) { >+ PRInt32 index = mEnt->mHalfOpens.IndexOf(this); >+ NS_ABORT_IF_FALSE(index != -1, "half open complete but no item"); >+ mEnt->mHalfOpens.RemoveElementAt(index); >+ } >+} >+ >+nsresult >+nsHttpConnectionMgr:: >+nsHalfOpenSocket::SetupStreams(nsISocketTransport **transport, >+ nsIAsyncInputStream **instream, >+ nsIAsyncOutputStream **outstream) >+{ >+ nsresult rv; >+ const char* types[1]; >+ types[0] = (mEnt->mConnInfo->UsingSSL()) ? >+ "ssl" : gHttpHandler->DefaultSocketType(); >+ PRUint32 typeCount = (types[0] != nsnull); >+ nsCOMPtr<nsISocketTransport> socketTransport; >+ rv = mMgr-> >+ mSTS->CreateTransport(types, typeCount, >+ nsDependentCString(mEnt->mConnInfo->Host()), >+ mEnt->mConnInfo->Port(), >+ mEnt->mConnInfo->ProxyInfo(), >+ getter_AddRefs(socketTransport)); >+ NS_ENSURE_SUCCESS(rv, rv); >+ PRUint32 tmpFlags = 0; >+ if (mTransaction->Caps() & NS_HTTP_REFRESH_DNS) >+ tmpFlags = nsISocketTransport::BYPASS_CACHE; >+ if (mTransaction->Caps() & NS_HTTP_LOAD_ANONYMOUS) >+ tmpFlags |= nsISocketTransport::ANONYMOUS_CONNECT; >+ socketTransport->SetConnectionFlags(tmpFlags); >+ socketTransport->SetQoSBits(gHttpHandler->GetQoSBits()); >+ rv = socketTransport->SetEventSink(this, nsnull); >+ NS_ENSURE_SUCCESS(rv, rv); >+ rv = socketTransport->SetSecurityCallbacks(this); >+ NS_ENSURE_SUCCESS(rv, rv); >+ nsCOMPtr<nsIOutputStream> sout; >+ rv = socketTransport->OpenOutputStream(nsITransport::OPEN_UNBUFFERED, >+ 0, 0, >+ getter_AddRefs(sout)); >+ NS_ENSURE_SUCCESS(rv, rv); >+ nsCOMPtr<nsIInputStream> sin; >+ rv = socketTransport->OpenInputStream(nsITransport::OPEN_UNBUFFERED, >+ 0, 0, >+ getter_AddRefs(sin)); >+ NS_ENSURE_SUCCESS(rv, rv); >+ socketTransport.forget(transport); >+ CallQueryInterface(sin, instream); >+ CallQueryInterface(sout, outstream); >+ rv = (*outstream)->AsyncWait(this, 0, 0, nsnull); >+ if (NS_SUCCEEDED(rv)) >+ NS_ADDREF(this); >+ return rv; >+} >+ >+nsresult >+nsHttpConnectionMgr::nsHalfOpenSocket::SetupPrimaryStreams() >+{ >+ return SetupStreams(getter_AddRefs(mSocketTransport), >+ getter_AddRefs(mStreamIn), >+ getter_AddRefs(mStreamOut)); >+} >+ >+nsresult >+nsHttpConnectionMgr::nsHalfOpenSocket::SetupBackupStreams() >+{ >+ return SetupStreams(getter_AddRefs(mBackupTransport), >+ getter_AddRefs(mBackupStreamIn), >+ getter_AddRefs(mBackupStreamOut)); >+} >+ >+void >+nsHttpConnectionMgr::nsHalfOpenSocket::SetupBackupTimer() >+{ >+ PRUint16 timeout = gHttpHandler->GetIdleSynTimeout(); >+ NS_ABORT_IF_FALSE(!mSynTimer, "timer already initd"); >+ if (timeout) { >+ // Setup the timer that will establish a backup socket >+ // if we do not get a writable event on the main one. >+ // We do this because a lost SYN takes a very long time >+ // to repair at the TCP level. >+ // >+ // Failure to setup the timer is something we can live with, >+ // so don't return an error in that case. >+ nsresult rv; >+ mSynTimer = do_CreateInstance(NS_TIMER_CONTRACTID, &rv); >+ if (NS_SUCCEEDED(rv)) { >+ mSynTimer->InitWithFuncCallback(SynTimeout, this, >+ timeout, nsITimer::TYPE_ONE_SHOT); >+ NS_ADDREF(this); >+ } >+ } >+} >+ >+void >+nsHttpConnectionMgr::nsHalfOpenSocket::Abandon() >+{ >+ PRInt32 refs = 0; >+ >+ if (mStreamOut) { >+ mStreamOut->AsyncWait(nsnull, 0, 0, nsnull); >+ mMgr->RecvdConnect(); >+ mStreamOut = nsnull; >+ refs++; >+ } >+ if (mBackupStreamOut) { >+ mBackupStreamOut->AsyncWait(nsnull, 0, 0, nsnull); >+ mMgr->RecvdConnect(); >+ mBackupStreamOut = nsnull; >+ refs++; >+ } >+ if (mSynTimer) { >+ mSynTimer->Cancel(); >+ mSynTimer = nsnull; >+ refs++; >+ } >+ >+ mEnt = nsnull; >+ for (PRInt32 i = 0; i < refs; i++) { >+ nsHalfOpenSocket *temp = this; >+ NS_RELEASE(temp); >+ } >+} >+ >+void >+nsHttpConnectionMgr:: >+nsHalfOpenSocket::SynTimeout(nsITimer *timer, void *closure) >+{ >+ NS_ABORT_IF_FALSE(PR_GetCurrentThread() == gSocketThread, "wrong thread"); >+ nsHalfOpenSocket *self = (nsHalfOpenSocket *)closure; >+ NS_ABORT_IF_FALSE(timer == self->mSynTimer, "wrong timer"); >+ if (!self->mMgr->AtActiveConnectionLimit(self->mEnt, >+ self->mTransaction->Caps())) { >+ nsresult rv = self->SetupBackupStreams(); >+ if (NS_SUCCEEDED(rv)) >+ self->mMgr->StartedConnect(); >+ } >+ >+ // this is the ref established when timer was armed >+ self->mSynTimer = nsnull; >+ NS_RELEASE(self); >+} >+ >+// method for nsIAsyncOutputStreamCallback >+NS_IMETHODIMP >+nsHttpConnectionMgr:: >+nsHalfOpenSocket::OnOutputStreamReady(nsIAsyncOutputStream *out) >+{ >+ NS_ABORT_IF_FALSE(PR_GetCurrentThread() == gSocketThread, "wrong thread"); >+ NS_ABORT_IF_FALSE(out == mStreamOut || >+ out == mBackupStreamOut, "stream mismatch"); >+ PRInt32 index; >+ nsresult rv; >+ >+ mMgr->RecvdConnect(); >+ >+ // If the syntimer is still armed, we can cancel it because no backup >+ // socket should be formed at this point >+ if (mSynTimer) { >+ NS_ABORT_IF_FALSE (out == mStreamOut, "timer for non existant stream"); >+ mSynTimer->Cancel(); >+ mSynTimer = nsnull; >+ nsHalfOpenSocket *temp = this; >+ NS_RELEASE(temp); >+ } >+ >+ // assign the new socket to the http connection >+ nsRefPtr<nsHttpConnection> conn = new nsHttpConnection(); >+ nsCOMPtr<nsIInterfaceRequestor> callbacks; >+ nsCOMPtr<nsIEventTarget> callbackTarget; >+ mTransaction->GetSecurityCallbacks(getter_AddRefs(callbacks), >+ getter_AddRefs(callbackTarget)); >+ if (out == mStreamOut) { >+ rv = conn->Init(mEnt->mConnInfo, mMgr->mMaxRequestDelay, >+ mSocketTransport, mStreamIn, mStreamOut, >+ callbacks, callbackTarget); >+ mStreamOut = nsnull; >+ } >+ else { >+ rv = conn->Init(mEnt->mConnInfo, mMgr->mMaxRequestDelay, >+ mBackupTransport, mBackupStreamIn, mBackupStreamOut, >+ callbacks, callbackTarget); >+ mBackupStreamOut = nsnull; >+ } >+ >+ if (NS_FAILED(rv)) >+ goto cleanup_osr; >+ >+ // if this is still in the pending list, remove it and dispatch it >+ index = mEnt->mPendingQ.IndexOf(mTransaction); >+ if (index != -1) { >+ mEnt->mPendingQ.RemoveElementAt(index); >+ nsHttpTransaction *temp = mTransaction; >+ NS_RELEASE(temp); >+ mMgr->AddActiveConn(conn, mEnt); >+ rv = mMgr->DispatchTransaction(mEnt, mTransaction, >+ mTransaction->Caps(), conn); >+ } >+ else { >+ // this transaction was dispatched off the pending q before all the >+ // sockets established themselves. >+ // We need to establish a small non-zero idle timeout so the connection >+ // mgr perceives this socket as suitable for persistent connection reuse >+ conn->SetIsReused(PR_TRUE); >+ conn->SetIdleTimeout(NS_MIN((PRUint16) 5, gHttpHandler->IdleTimeout())); >+ NS_ADDREF(conn); // because onmsg*() expects to drop a reference >+ mMgr->OnMsgReclaimConnection(NS_OK, conn); >+ } >+ >+cleanup_osr: >+ // cleanup reference originated in successful setupstreams() >+ nsHalfOpenSocket *tmp = this; >+ NS_RELEASE(tmp); >+ return rv; >+} >+ >+// method for nsITransportEventSink >+NS_IMETHODIMP >+nsHttpConnectionMgr::nsHalfOpenSocket::OnTransportStatus(nsITransport *trans, >+ nsresult status, >+ PRUint64 progress, >+ PRUint64 progressMax) >+{ >+ if (mTransaction) >+ mTransaction->OnTransportStatus(status, progress); >+ return NS_OK; >+} >+ >+// method for nsIInterfaceRequestor >+NS_IMETHODIMP >+nsHttpConnectionMgr::nsHalfOpenSocket::GetInterface(const nsIID &iid, >+ void **result) >+{ >+ if (mTransaction) { >+ nsCOMPtr<nsIInterfaceRequestor> callbacks; >+ mTransaction->GetSecurityCallbacks(getter_AddRefs(callbacks), nsnull); >+ if (callbacks) >+ return callbacks->GetInterface(iid, result); >+ } >+ return NS_ERROR_NO_INTERFACE; >+} >+ > PRBool > nsHttpConnectionMgr::nsConnectionHandle::LastTransactionExpectedNoContent() > { > return mConn->LastTransactionExpectedNoContent(); > } > > void > nsHttpConnectionMgr:: >diff --git a/netwerk/protocol/http/nsHttpConnectionMgr.h b/netwerk/protocol/http/nsHttpConnectionMgr.h >--- a/netwerk/protocol/http/nsHttpConnectionMgr.h >+++ b/netwerk/protocol/http/nsHttpConnectionMgr.h >@@ -42,16 +42,17 @@ > #include "nsHttpConnectionInfo.h" > #include "nsHttpConnection.h" > #include "nsHttpTransaction.h" > #include "nsTArray.h" > #include "nsThreadUtils.h" > #include "nsHashtable.h" > #include "nsAutoPtr.h" > #include "prmon.h" >+#include "nsISocketTransportService.h" > > #include "nsIObserver.h" > #include "nsITimer.h" > > class nsHttpPipeline; > > //----------------------------------------------------------------------------- > >@@ -134,17 +135,18 @@ public: > void AddTransactionToPipeline(nsHttpPipeline *); > > // called to force the transaction queue to be processed once more, giving > // preference to the specified connection. > nsresult ProcessPendingQ(nsHttpConnectionInfo *); > > private: > virtual ~nsHttpConnectionMgr(); >- >+ class nsHalfOpenSocket; >+ > // nsConnectionEntry > // > // mCT maps connection info hash key to nsConnectionEntry object, which > // contains list of active and idle connections as well as the list of > // pending transactions. > // > struct nsConnectionEntry > { >@@ -154,16 +156,17 @@ private: > NS_ADDREF(mConnInfo); > } > ~nsConnectionEntry() { NS_RELEASE(mConnInfo); } > > nsHttpConnectionInfo *mConnInfo; > nsTArray<nsHttpTransaction*> mPendingQ; // pending transaction queue > nsTArray<nsHttpConnection*> mActiveConns; // active connections > nsTArray<nsHttpConnection*> mIdleConns; // idle persistent connections >+ nsTArray<nsHalfOpenSocket*> mHalfOpens; > }; > > // nsConnectionHandle > // > // thin wrapper around a real connection, used to keep track of references > // to the connection to determine when the connection may be reused. the > // transaction (or pipeline) owns a reference to this handle. this extra > // layer of indirection greatly simplifies consumer code, avoiding the >@@ -177,23 +180,71 @@ private: > NS_DECL_NSAHTTPCONNECTION > > nsConnectionHandle(nsHttpConnection *conn) { NS_ADDREF(mConn = conn); } > virtual ~nsConnectionHandle(); > > nsHttpConnection *mConn; > }; > >+ // nsHalfOpenSocket is used to hold the state of an opening TCP socket >+ // while we wait for it to establish and bind it to a connection >+ >+ class nsHalfOpenSocket : public nsIOutputStreamCallback, >+ public nsITransportEventSink, >+ public nsIInterfaceRequestor >+ { >+ public: >+ NS_DECL_ISUPPORTS >+ NS_DECL_NSIOUTPUTSTREAMCALLBACK >+ NS_DECL_NSITRANSPORTEVENTSINK >+ NS_DECL_NSIINTERFACEREQUESTOR >+ >+ nsHalfOpenSocket(nsConnectionEntry *ent, >+ nsHttpConnectionMgr *mgr, >+ nsHttpTransaction *trans) >+ : mEnt(ent), >+ mMgr(mgr), >+ mTransaction(trans) {} >+ ~nsHalfOpenSocket(); >+ >+ nsresult SetupStreams(nsISocketTransport **, >+ nsIAsyncInputStream **, >+ nsIAsyncOutputStream **); >+ nsresult SetupPrimaryStreams(); >+ nsresult SetupBackupStreams(); >+ void SetupBackupTimer(); >+ void Abandon(); >+ >+ private: >+ static void SynTimeout(nsITimer *, void *); >+ >+ nsConnectionEntry *mEnt; >+ nsHttpConnectionMgr *mMgr; >+ nsRefPtr<nsHttpTransaction> mTransaction; >+ nsCOMPtr<nsISocketTransport> mSocketTransport; >+ nsCOMPtr<nsIAsyncOutputStream> mStreamOut; >+ nsCOMPtr<nsIAsyncInputStream> mStreamIn; >+ >+ // for syn retry >+ nsCOMPtr<nsITimer> mSynTimer; >+ nsCOMPtr<nsISocketTransport> mBackupTransport; >+ nsCOMPtr<nsIAsyncOutputStream> mBackupStreamOut; >+ nsCOMPtr<nsIAsyncInputStream> mBackupStreamIn; >+ }; >+ friend class nsHalfOpenSocket; >+ > //------------------------------------------------------------------------- > // NOTE: these members may be accessed from any thread (use mMonitor) > //------------------------------------------------------------------------- > > PRInt32 mRef; > PRMonitor *mMonitor; > nsCOMPtr<nsIEventTarget> mSocketThreadTarget; >+ nsCOMPtr<nsISocketTransportService> mSTS; > > // connection limits > PRUint16 mMaxConns; > PRUint16 mMaxConnsPerHost; > PRUint16 mMaxConnsPerProxy; > PRUint16 mMaxPersistConnsPerHost; > PRUint16 mMaxPersistConnsPerProxy; > PRUint16 mMaxRequestDelay; // in seconds >@@ -201,29 +252,34 @@ private: > > PRPackedBool mIsShuttingDown; > > //------------------------------------------------------------------------- > // NOTE: these members are only accessed on the socket transport thread > //------------------------------------------------------------------------- > > static PRIntn ProcessOneTransactionCB(nsHashKey *, void *, void *); >- static PRIntn PurgeOneIdleConnectionCB(nsHashKey *, void *, void *); >+ > static PRIntn PruneDeadConnectionsCB(nsHashKey *, void *, void *); > static PRIntn ShutdownPassCB(nsHashKey *, void *, void *); >- >+ static PRIntn PurgeExcessIdleConnectionsCB(nsHashKey *, void *, void *); > PRBool ProcessPendingQForEntry(nsConnectionEntry *); > PRBool AtActiveConnectionLimit(nsConnectionEntry *, PRUint8 caps); >- void GetConnection(nsConnectionEntry *, PRUint8 caps, nsHttpConnection **); >+ void GetConnection(nsConnectionEntry *, nsHttpTransaction *, >+ nsHttpConnection **); > nsresult DispatchTransaction(nsConnectionEntry *, nsAHttpTransaction *, > PRUint8 caps, nsHttpConnection *); > PRBool BuildPipeline(nsConnectionEntry *, nsAHttpTransaction *, nsHttpPipeline **); > nsresult ProcessNewTransaction(nsHttpTransaction *); > nsresult EnsureSocketThreadTargetIfOnline(); >- >+ nsresult CreateTransport(nsConnectionEntry *, nsHttpTransaction *); >+ void AddActiveConn(nsHttpConnection *, nsConnectionEntry *); >+ void StartedConnect(); >+ void RecvdConnect(); >+ > // message handlers have this signature > typedef void (nsHttpConnectionMgr:: *nsConnEventHandler)(PRInt32, void *); > > // nsConnEvent > // > // subclass of nsRunnable used to marshall events to the socket transport > // thread. this class is used to implement PostEvent. > // >diff --git a/netwerk/protocol/http/nsHttpHandler.cpp b/netwerk/protocol/http/nsHttpHandler.cpp >--- a/netwerk/protocol/http/nsHttpHandler.cpp >+++ b/netwerk/protocol/http/nsHttpHandler.cpp >@@ -174,16 +174,17 @@ nsHttpHandler::nsHttpHandler() > , mHttpVersion(NS_HTTP_VERSION_1_1) > , mProxyHttpVersion(NS_HTTP_VERSION_1_1) > , mCapabilities(NS_HTTP_ALLOW_KEEPALIVE) > , mProxyCapabilities(NS_HTTP_ALLOW_KEEPALIVE) > , mReferrerLevel(0xff) // by default we always send a referrer > , mIdleTimeout(10) > , mMaxRequestAttempts(10) > , mMaxRequestDelay(10) >+ , mIdleSynTimeout(250) > , mMaxConnections(24) > , mMaxConnectionsPerServer(8) > , mMaxPersistentConnectionsPerServer(2) > , mMaxPersistentConnectionsPerProxy(4) > , mMaxPipelinedRequests(2) > , mRedirectionLimit(10) > , mPhishyUserPassLength(1) > , mQoSBits(0x00) >@@ -923,16 +924,22 @@ nsHttpHandler::PrefsChanged(nsIPrefBranc > } > > if (PREF_CHANGED(HTTP_PREF("redirection-limit"))) { > rv = prefs->GetIntPref(HTTP_PREF("redirection-limit"), &val); > if (NS_SUCCEEDED(rv)) > mRedirectionLimit = (PRUint8) NS_CLAMP(val, 0, 0xff); > } > >+ if (PREF_CHANGED(HTTP_PREF("connection-retry-timeout"))) { >+ rv = prefs->GetIntPref(HTTP_PREF("connection-retry-timeout"), &val); >+ if (NS_SUCCEEDED(rv)) >+ mIdleSynTimeout = (PRUint16) NS_CLAMP(val, 0, 3000); >+ } >+ > if (PREF_CHANGED(HTTP_PREF("version"))) { > nsXPIDLCString httpVersion; > prefs->GetCharPref(HTTP_PREF("version"), getter_Copies(httpVersion)); > if (httpVersion) { > if (!PL_strcmp(httpVersion, "1.1")) > mHttpVersion = NS_HTTP_VERSION_1_1; > else if (!PL_strcmp(httpVersion, "0.9")) > mHttpVersion = NS_HTTP_VERSION_0_9; >diff --git a/netwerk/protocol/http/nsHttpHandler.h b/netwerk/protocol/http/nsHttpHandler.h >--- a/netwerk/protocol/http/nsHttpHandler.h >+++ b/netwerk/protocol/http/nsHttpHandler.h >@@ -102,16 +102,17 @@ public: > PRBool SendSecureXSiteReferrer() { return mSendSecureXSiteReferrer; } > PRUint8 RedirectionLimit() { return mRedirectionLimit; } > PRUint16 IdleTimeout() { return mIdleTimeout; } > PRUint16 MaxRequestAttempts() { return mMaxRequestAttempts; } > const char *DefaultSocketType() { return mDefaultSocketType.get(); /* ok to return null */ } > nsIIDNService *IDNConverter() { return mIDNConverter; } > PRUint32 PhishyUserPassLength() { return mPhishyUserPassLength; } > PRUint8 GetQoSBits() { return mQoSBits; } >+ PRUint16 GetIdleSynTimeout() { return mIdleSynTimeout; } > > PRBool IsPersistentHttpsCachingEnabled() { return mEnablePersistentHttpsCaching; } > > PRBool PromptTempRedirect() { return mPromptTempRedirect; } > > nsHttpAuthCache *AuthCache() { return &mAuthCache; } > nsHttpConnectionMgr *ConnMgr() { return mConnMgr; } > >@@ -258,16 +259,17 @@ private: > PRUint8 mProxyHttpVersion; > PRUint8 mCapabilities; > PRUint8 mProxyCapabilities; > PRUint8 mReferrerLevel; > > PRUint16 mIdleTimeout; > PRUint16 mMaxRequestAttempts; > PRUint16 mMaxRequestDelay; >+ PRUint16 mIdleSynTimeout; > > PRUint16 mMaxConnections; > PRUint8 mMaxConnectionsPerServer; > PRUint8 mMaxPersistentConnectionsPerServer; > PRUint8 mMaxPersistentConnectionsPerProxy; > PRUint8 mMaxPipelinedRequests; > > PRUint8 mRedirectionLimit; >diff --git a/netwerk/protocol/http/nsHttpPipeline.cpp b/netwerk/protocol/http/nsHttpPipeline.cpp >--- a/netwerk/protocol/http/nsHttpPipeline.cpp >+++ b/netwerk/protocol/http/nsHttpPipeline.cpp >@@ -319,26 +319,30 @@ nsHttpPipeline::SetConnection(nsAHttpCon > NS_IF_ADDREF(mConnection = conn); > > PRInt32 i, count = mRequestQ.Length(); > for (i=0; i<count; ++i) > Request(i)->SetConnection(this); > } > > void >-nsHttpPipeline::GetSecurityCallbacks(nsIInterfaceRequestor **result) >+nsHttpPipeline::GetSecurityCallbacks(nsIInterfaceRequestor **result, >+ nsIEventTarget **target) > { > NS_ASSERTION(PR_GetCurrentThread() == gSocketThread, "wrong thread"); > > // return security callbacks from first request > nsAHttpTransaction *trans = Request(0); > if (trans) >- trans->GetSecurityCallbacks(result); >- else >+ trans->GetSecurityCallbacks(result, target); >+ else { > *result = nsnull; >+ if (target) >+ *target = nsnull; >+ } > } > > void > nsHttpPipeline::OnTransportStatus(nsresult status, PRUint64 progress) > { > LOG(("nsHttpPipeline::OnStatus [this=%x status=%x progress=%llu]\n", > this, status, progress)); > >diff --git a/netwerk/protocol/http/nsHttpTransaction.cpp b/netwerk/protocol/http/nsHttpTransaction.cpp >--- a/netwerk/protocol/http/nsHttpTransaction.cpp >+++ b/netwerk/protocol/http/nsHttpTransaction.cpp >@@ -328,19 +328,22 @@ nsHttpTransaction::TakeResponseHead() > void > nsHttpTransaction::SetConnection(nsAHttpConnection *conn) > { > NS_IF_RELEASE(mConnection); > NS_IF_ADDREF(mConnection = conn); > } > > void >-nsHttpTransaction::GetSecurityCallbacks(nsIInterfaceRequestor **cb) >+nsHttpTransaction::GetSecurityCallbacks(nsIInterfaceRequestor **cb, >+ nsIEventTarget **target) > { > NS_IF_ADDREF(*cb = mCallbacks); >+ if (target) >+ NS_IF_ADDREF(*target = mConsumerTarget); > } > > void > nsHttpTransaction::OnTransportStatus(nsresult status, PRUint64 progress) > { > LOG(("nsHttpTransaction::OnSocketStatus [this=%x status=%x progress=%llu]\n", > this, status, progress)); >
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