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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsSocketTransport2_h__
+#define nsSocketTransport2_h__
+
+#ifdef DEBUG_darinf
+# define ENABLE_SOCKET_TRACING
+#endif
+
+#include <functional>
+
+#include "mozilla/Mutex.h"
+#include "nsSocketTransportService2.h"
+#include "nsString.h"
+#include "nsCOMPtr.h"
+
+#include "nsIInterfaceRequestor.h"
+#include "nsISocketTransport.h"
+#include "nsIAsyncInputStream.h"
+#include "nsIAsyncOutputStream.h"
+#include "nsIDNSListener.h"
+#include "nsIDNSRecord.h"
+#include "nsIClassInfo.h"
+#include "mozilla/net/DNS.h"
+#include "nsASocketHandler.h"
+#include "mozilla/Telemetry.h"
+
+#include "prerror.h"
+#include "ssl.h"
+
+class nsICancelable;
+class nsIDNSRecord;
+class nsIInterfaceRequestor;
+
+//-----------------------------------------------------------------------------
+
+// after this short interval, we will return to PR_Poll
+#define NS_SOCKET_CONNECT_TIMEOUT PR_MillisecondsToInterval(20)
+
+//-----------------------------------------------------------------------------
+
+namespace mozilla {
+namespace net {
+
+nsresult ErrorAccordingToNSPR(PRErrorCode errorCode);
+
+class nsSocketInputStream;
+class nsSocketOutputStream;
+
+//-----------------------------------------------------------------------------
+
+class nsSocketTransport final : public nsASocketHandler,
+ public nsISocketTransport,
+ public nsIDNSListener,
+ public nsIClassInfo,
+ public nsIInterfaceRequestor {
+ public:
+ NS_DECL_THREADSAFE_ISUPPORTS
+ NS_DECL_NSITRANSPORT
+ NS_DECL_NSISOCKETTRANSPORT
+ NS_DECL_NSIDNSLISTENER
+ NS_DECL_NSICLASSINFO
+ NS_DECL_NSIINTERFACEREQUESTOR
+
+ nsSocketTransport();
+
+ // this method instructs the socket transport to open a socket of the
+ // given type(s) to the given host or proxy.
+ nsresult Init(const nsTArray<nsCString>& socketTypes, const nsACString& host,
+ uint16_t port, const nsACString& hostRoute, uint16_t portRoute,
+ nsIProxyInfo* proxyInfo, nsIDNSRecord* dnsRecord);
+
+ // this method instructs the socket transport to use an already connected
+ // socket with the given address.
+ nsresult InitWithConnectedSocket(PRFileDesc* socketFD, const NetAddr* addr);
+
+ // this method instructs the socket transport to use an already connected
+ // socket with the given address, and additionally supplies the security
+ // callbacks interface requestor.
+ nsresult InitWithConnectedSocket(PRFileDesc* aFD, const NetAddr* aAddr,
+ nsIInterfaceRequestor* aCallbacks);
+
+#ifdef XP_UNIX
+ // This method instructs the socket transport to open a socket
+ // connected to the given Unix domain address. We can only create
+ // unlayered, simple, stream sockets.
+ nsresult InitWithFilename(const char* filename);
+
+ // This method instructs the socket transport to open a socket
+ // connected to the given Unix domain address that includes abstract
+ // socket address. If using abstract socket address, first character of
+ // name parameter has to be \0.
+ // We can only create unlayered, simple, stream sockets.
+ nsresult InitWithName(const char* name, size_t len);
+#endif
+
+ // nsASocketHandler methods:
+ void OnSocketReady(PRFileDesc*, int16_t outFlags) override;
+ void OnSocketDetached(PRFileDesc*) override;
+ void IsLocal(bool* aIsLocal) override;
+ void OnKeepaliveEnabledPrefChange(bool aEnabled) final;
+
+ // called when a socket event is handled
+ void OnSocketEvent(uint32_t type, nsresult status, nsISupports* param,
+ std::function<void()>&& task);
+
+ uint64_t ByteCountReceived() override;
+ uint64_t ByteCountSent() override;
+ static void CloseSocket(PRFileDesc* aFd, bool aTelemetryEnabled);
+ static void SendPRBlockingTelemetry(
+ PRIntervalTime aStart, Telemetry::HistogramID aIDNormal,
+ Telemetry::HistogramID aIDShutdown,
+ Telemetry::HistogramID aIDConnectivityChange,
+ Telemetry::HistogramID aIDLinkChange, Telemetry::HistogramID aIDOffline);
+
+ protected:
+ virtual ~nsSocketTransport();
+
+ private:
+ // event types
+ enum {
+ MSG_ENSURE_CONNECT,
+ MSG_DNS_LOOKUP_COMPLETE,
+ MSG_RETRY_INIT_SOCKET,
+ MSG_TIMEOUT_CHANGED,
+ MSG_INPUT_CLOSED,
+ MSG_INPUT_PENDING,
+ MSG_OUTPUT_CLOSED,
+ MSG_OUTPUT_PENDING
+ };
+ nsresult PostEvent(uint32_t type, nsresult status = NS_OK,
+ nsISupports* param = nullptr,
+ std::function<void()>&& task = nullptr);
+
+ enum {
+ STATE_CLOSED,
+ STATE_IDLE,
+ STATE_RESOLVING,
+ STATE_CONNECTING,
+ STATE_TRANSFERRING
+ };
+
+ // Safer way to get and automatically release PRFileDesc objects.
+ class MOZ_STACK_CLASS PRFileDescAutoLock {
+ public:
+ explicit PRFileDescAutoLock(nsSocketTransport* aSocketTransport,
+ nsresult* aConditionWhileLocked = nullptr)
+ : mSocketTransport(aSocketTransport), mFd(nullptr) {
+ MOZ_ASSERT(aSocketTransport);
+ MutexAutoLock lock(mSocketTransport->mLock);
+ if (aConditionWhileLocked) {
+ *aConditionWhileLocked = mSocketTransport->mCondition;
+ if (NS_FAILED(mSocketTransport->mCondition)) {
+ return;
+ }
+ }
+ mFd = mSocketTransport->GetFD_Locked();
+ }
+ ~PRFileDescAutoLock() {
+ MutexAutoLock lock(mSocketTransport->mLock);
+ if (mFd) {
+ mSocketTransport->ReleaseFD_Locked(mFd);
+ }
+ }
+ bool IsInitialized() { return mFd; }
+ operator PRFileDesc*() { return mFd; }
+ nsresult SetKeepaliveEnabled(bool aEnable);
+ nsresult SetKeepaliveVals(bool aEnabled, int aIdleTime, int aRetryInterval,
+ int aProbeCount);
+
+ private:
+ operator PRFileDescAutoLock*() { return nullptr; }
+
+ // Weak ptr to nsSocketTransport since this is a stack class only.
+ nsSocketTransport* mSocketTransport;
+ PRFileDesc* mFd;
+ };
+ friend class PRFileDescAutoLock;
+
+ class LockedPRFileDesc {
+ public:
+ explicit LockedPRFileDesc(nsSocketTransport* aSocketTransport)
+ : mSocketTransport(aSocketTransport), mFd(nullptr) {
+ MOZ_ASSERT(aSocketTransport);
+ }
+ ~LockedPRFileDesc() = default;
+ bool IsInitialized() { return mFd; }
+ LockedPRFileDesc& operator=(PRFileDesc* aFd) {
+ mSocketTransport->mLock.AssertCurrentThreadOwns();
+ mFd = aFd;
+ return *this;
+ }
+ operator PRFileDesc*() {
+ if (mSocketTransport->mAttached) {
+ mSocketTransport->mLock.AssertCurrentThreadOwns();
+ }
+ return mFd;
+ }
+ bool operator==(PRFileDesc* aFd) {
+ mSocketTransport->mLock.AssertCurrentThreadOwns();
+ return mFd == aFd;
+ }
+
+ private:
+ operator LockedPRFileDesc*() { return nullptr; }
+ // Weak ptr to nsSocketTransport since it owns this class.
+ nsSocketTransport* mSocketTransport;
+ PRFileDesc* mFd;
+ };
+ friend class LockedPRFileDesc;
+
+ //-------------------------------------------------------------------------
+ // these members are "set" at initialization time and are never modified
+ // afterwards. this allows them to be safely accessed from any thread.
+ //-------------------------------------------------------------------------
+
+ // socket type info:
+ nsTArray<nsCString> mTypes;
+ nsCString mHost;
+ nsCString mProxyHost;
+ nsCString mOriginHost;
+ uint16_t mPort{0};
+ nsCOMPtr<nsIProxyInfo> mProxyInfo;
+ uint16_t mProxyPort{0};
+ uint16_t mOriginPort{0};
+ bool mProxyTransparent{false};
+ bool mProxyTransparentResolvesHost{false};
+ bool mHttpsProxy{false};
+ uint32_t mConnectionFlags{0};
+ // When we fail to connect using a prefered IP family, we tell the consumer to
+ // reset the IP family preference on the connection entry.
+ bool mResetFamilyPreference{false};
+ uint32_t mTlsFlags{0};
+ bool mReuseAddrPort{false};
+
+ // The origin attributes are used to create sockets. The first party domain
+ // will eventually be used to isolate OCSP cache and is only non-empty when
+ // "privacy.firstparty.isolate" is enabled. Setting this is the only way to
+ // carry origin attributes down to NSPR layers which are final consumers.
+ // It must be set before the socket transport is built.
+ OriginAttributes mOriginAttributes;
+
+ uint16_t SocketPort() {
+ return (!mProxyHost.IsEmpty() && !mProxyTransparent) ? mProxyPort : mPort;
+ }
+ const nsCString& SocketHost() {
+ return (!mProxyHost.IsEmpty() && !mProxyTransparent) ? mProxyHost : mHost;
+ }
+
+ Atomic<bool> mInputClosed{true};
+ Atomic<bool> mOutputClosed{true};
+
+ //-------------------------------------------------------------------------
+ // members accessible only on the socket transport thread:
+ // (the exception being initialization/shutdown time)
+ //-------------------------------------------------------------------------
+
+ // socket state vars:
+ uint32_t mState{STATE_CLOSED}; // STATE_??? flags
+ bool mAttached{false};
+
+ // this flag is used to determine if the results of a host lookup arrive
+ // recursively or not. this flag is not protected by any lock.
+ bool mResolving{false};
+
+ nsCOMPtr<nsICancelable> mDNSRequest;
+ nsCOMPtr<nsIDNSAddrRecord> mDNSRecord;
+
+ nsCString mEchConfig;
+ bool mEchConfigUsed = false;
+ bool mResolvedByTRR{false};
+ nsIRequest::TRRMode mEffectiveTRRMode{nsIRequest::TRR_DEFAULT_MODE};
+ nsITRRSkipReason::value mTRRSkipReason{nsITRRSkipReason::TRR_UNSET};
+
+ nsCOMPtr<nsISupports> mInputCopyContext;
+ nsCOMPtr<nsISupports> mOutputCopyContext;
+
+ // mNetAddr/mSelfAddr is valid from GetPeerAddr()/GetSelfAddr() once we have
+ // reached STATE_TRANSFERRING. It must not change after that.
+ void SetSocketName(PRFileDesc* fd);
+ NetAddr mNetAddr;
+ NetAddr mSelfAddr; // getsockname()
+ Atomic<bool, Relaxed> mNetAddrIsSet{false};
+ Atomic<bool, Relaxed> mSelfAddrIsSet{false};
+
+ UniquePtr<NetAddr> mBindAddr;
+
+ // socket methods (these can only be called on the socket thread):
+
+ void SendStatus(nsresult status);
+ nsresult ResolveHost();
+ nsresult BuildSocket(PRFileDesc*&, bool&, bool&);
+ nsresult InitiateSocket();
+ bool RecoverFromError();
+
+ void OnMsgInputPending() {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ if (mState == STATE_TRANSFERRING) {
+ mPollFlags |= (PR_POLL_READ | PR_POLL_EXCEPT);
+ }
+ }
+ void OnMsgOutputPending() {
+ MOZ_ASSERT(OnSocketThread(), "not on socket thread");
+ if (mState == STATE_TRANSFERRING) {
+ mPollFlags |= (PR_POLL_WRITE | PR_POLL_EXCEPT);
+ }
+ }
+ void OnMsgInputClosed(nsresult reason);
+ void OnMsgOutputClosed(nsresult reason);
+
+ // called when the socket is connected
+ void OnSocketConnected();
+
+ //-------------------------------------------------------------------------
+ // socket input/output objects. these may be accessed on any thread with
+ // the exception of some specific methods (XXX).
+
+ // protects members in this section.
+ Mutex mLock{"nsSocketTransport.mLock"};
+ LockedPRFileDesc mFD MOZ_GUARDED_BY(mLock);
+ // mFD is closed when mFDref goes to zero.
+ nsrefcnt mFDref MOZ_GUARDED_BY(mLock){0};
+ // mFD is available to consumer when TRUE.
+ bool mFDconnected MOZ_GUARDED_BY(mLock){false};
+
+ // A delete protector reference to gSocketTransportService held for lifetime
+ // of 'this'. Sometimes used interchangably with gSocketTransportService due
+ // to scoping.
+ RefPtr<nsSocketTransportService> mSocketTransportService;
+
+ nsCOMPtr<nsIInterfaceRequestor> mCallbacks;
+ nsCOMPtr<nsITransportEventSink> mEventSink;
+ nsCOMPtr<nsITLSSocketControl> mTLSSocketControl;
+
+ UniquePtr<nsSocketInputStream> mInput;
+ UniquePtr<nsSocketOutputStream> mOutput;
+
+ friend class nsSocketInputStream;
+ friend class nsSocketOutputStream;
+
+ // socket timeouts are protected by mLock.
+ uint16_t mTimeouts[2]{0};
+
+ // linger options to use when closing
+ bool mLingerPolarity{false};
+ int16_t mLingerTimeout{0};
+
+ // QoS setting for socket
+ uint8_t mQoSBits{0x00};
+
+ //
+ // mFD access methods: called with mLock held.
+ //
+ PRFileDesc* GetFD_Locked() MOZ_REQUIRES(mLock);
+ void ReleaseFD_Locked(PRFileDesc* fd) MOZ_REQUIRES(mLock);
+
+ //
+ // stream state changes (called outside mLock):
+ //
+ void OnInputClosed(nsresult reason) {
+ // no need to post an event if called on the socket thread
+ if (OnSocketThread()) {
+ OnMsgInputClosed(reason);
+ } else {
+ PostEvent(MSG_INPUT_CLOSED, reason);
+ }
+ }
+ void OnInputPending() {
+ // no need to post an event if called on the socket thread
+ if (OnSocketThread()) {
+ OnMsgInputPending();
+ } else {
+ PostEvent(MSG_INPUT_PENDING);
+ }
+ }
+ void OnOutputClosed(nsresult reason) {
+ // no need to post an event if called on the socket thread
+ if (OnSocketThread()) {
+ OnMsgOutputClosed(reason); // XXX need to not be inside lock!
+ } else {
+ PostEvent(MSG_OUTPUT_CLOSED, reason);
+ }
+ }
+ void OnOutputPending() {
+ // no need to post an event if called on the socket thread
+ if (OnSocketThread()) {
+ OnMsgOutputPending();
+ } else {
+ PostEvent(MSG_OUTPUT_PENDING);
+ }
+ }
+
+#ifdef ENABLE_SOCKET_TRACING
+ void TraceInBuf(const char* buf, int32_t n);
+ void TraceOutBuf(const char* buf, int32_t n);
+#endif
+
+ // Reads prefs to get default keepalive config.
+ nsresult EnsureKeepaliveValsAreInitialized();
+
+ // Groups calls to fd.SetKeepaliveEnabled and fd.SetKeepaliveVals.
+ nsresult SetKeepaliveEnabledInternal(bool aEnable);
+
+ // True if keepalive has been enabled by the socket owner. Note: Keepalive
+ // must also be enabled globally for it to be enabled in TCP.
+ bool mKeepaliveEnabled{false};
+
+ // Keepalive config (support varies by platform).
+ int32_t mKeepaliveIdleTimeS{-1};
+ int32_t mKeepaliveRetryIntervalS{-1};
+ int32_t mKeepaliveProbeCount{-1};
+
+ Atomic<bool> mDoNotRetryToConnect{false};
+
+ // Whether the port remapping has already been applied. We definitely want to
+ // prevent duplicate calls in case of chaining remapping.
+ bool mPortRemappingApplied = false;
+
+ bool mExternalDNSResolution = false;
+ bool mRetryDnsIfPossible = false;
+};
+
+class nsSocketInputStream : public nsIAsyncInputStream {
+ public:
+ NS_DECL_ISUPPORTS_INHERITED
+ NS_DECL_NSIINPUTSTREAM
+ NS_DECL_NSIASYNCINPUTSTREAM
+
+ explicit nsSocketInputStream(nsSocketTransport*);
+ virtual ~nsSocketInputStream() = default;
+
+ // nsSocketTransport holds a ref to us
+ bool IsReferenced() { return mReaderRefCnt > 0; }
+ nsresult Condition() {
+ MutexAutoLock lock(mTransport->mLock);
+ return mCondition;
+ }
+ uint64_t ByteCount() {
+ MutexAutoLock lock(mTransport->mLock);
+ return mByteCount;
+ }
+ uint64_t ByteCount(MutexAutoLock&) MOZ_NO_THREAD_SAFETY_ANALYSIS {
+ return mByteCount;
+ }
+
+ // called by the socket transport on the socket thread...
+ void OnSocketReady(nsresult condition);
+
+ private:
+ nsSocketTransport* mTransport;
+ ThreadSafeAutoRefCnt mReaderRefCnt{0};
+
+ // access to these should be protected by mTransport->mLock but we
+ // can't order things to allow using MOZ_GUARDED_BY().
+ nsresult mCondition MOZ_GUARDED_BY(mTransport->mLock){NS_OK};
+ nsCOMPtr<nsIInputStreamCallback> mCallback MOZ_GUARDED_BY(mTransport->mLock);
+ uint32_t mCallbackFlags MOZ_GUARDED_BY(mTransport->mLock){0};
+ uint64_t mByteCount MOZ_GUARDED_BY(mTransport->mLock){0};
+};
+
+//-----------------------------------------------------------------------------
+
+class nsSocketOutputStream : public nsIAsyncOutputStream {
+ public:
+ NS_DECL_ISUPPORTS_INHERITED
+ NS_DECL_NSIOUTPUTSTREAM
+ NS_DECL_NSIASYNCOUTPUTSTREAM
+
+ explicit nsSocketOutputStream(nsSocketTransport*);
+ virtual ~nsSocketOutputStream() = default;
+
+ // nsSocketTransport holds a ref to us
+ bool IsReferenced() { return mWriterRefCnt > 0; }
+ nsresult Condition() {
+ MutexAutoLock lock(mTransport->mLock);
+ return mCondition;
+ }
+ uint64_t ByteCount() {
+ MutexAutoLock lock(mTransport->mLock);
+ return mByteCount;
+ }
+ uint64_t ByteCount(MutexAutoLock&) MOZ_NO_THREAD_SAFETY_ANALYSIS {
+ return mByteCount;
+ }
+
+ // called by the socket transport on the socket thread...
+ void OnSocketReady(nsresult condition);
+
+ private:
+ static nsresult WriteFromSegments(nsIInputStream*, void*, const char*,
+ uint32_t offset, uint32_t count,
+ uint32_t* countRead);
+
+ nsSocketTransport* mTransport;
+ ThreadSafeAutoRefCnt mWriterRefCnt{0};
+
+ // access to these should be protected by mTransport->mLock but we
+ // can't order things to allow using MOZ_GUARDED_BY().
+ nsresult mCondition MOZ_GUARDED_BY(mTransport->mLock){NS_OK};
+ nsCOMPtr<nsIOutputStreamCallback> mCallback MOZ_GUARDED_BY(mTransport->mLock);
+ uint32_t mCallbackFlags MOZ_GUARDED_BY(mTransport->mLock){0};
+ uint64_t mByteCount MOZ_GUARDED_BY(mTransport->mLock){0};
+};
+
+} // namespace net
+} // namespace mozilla
+
+#endif // !nsSocketTransport_h__