| /* |
| * |
| * Copyright (c) 2020-2021 Project CHIP Authors |
| * Copyright (c) 2013-2017 Nest Labs, Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| /** |
| * @file |
| * This header file defines the <tt>Inet::TCPEndPoint</tt> |
| * class, where the CHIP Inet Layer encapsulates methods for |
| * interacting with TCP transport endpoints (SOCK_DGRAM sockets |
| * on Linux and BSD-derived systems) or LwIP TCP protocol |
| * control blocks, as the system is configured accordingly. |
| */ |
| |
| #pragma once |
| |
| #include <inet/EndPointBasis.h> |
| #include <inet/IPAddress.h> |
| #include <inet/InetInterface.h> |
| #include <inet/InetLayer.h> |
| #include <system/SystemLayer.h> |
| #include <system/SystemPacketBuffer.h> |
| |
| #include <utility> |
| |
| namespace chip { |
| |
| namespace Transport { |
| class TCPTest; |
| }; |
| |
| namespace Inet { |
| |
| class TCPTest; |
| |
| /** |
| * @brief Objects of this class represent TCP transport endpoints. |
| * |
| * @details |
| * CHIP Inet Layer encapsulates methods for interacting with TCP transport |
| * endpoints (SOCK_STREAM sockets on Linux and BSD-derived systems) or LwIP |
| * TCP protocol control blocks, as the system is configured accordingly. |
| */ |
| class DLL_EXPORT TCPEndPoint : public EndPointBasis<TCPEndPoint> |
| { |
| public: |
| /** |
| * @brief Bind the endpoint to an interface IP address. |
| * |
| * @param[in] addrType the protocol version of the IP address |
| * @param[in] addr the IP address (must be an interface address) |
| * @param[in] port the TCP port |
| * @param[in] reuseAddr option to share binding with other endpoints |
| * |
| * @retval CHIP_NO_ERROR success: endpoint bound to address |
| * @retval CHIP_ERROR_INCORRECT_STATE endpoint has been bound previously |
| * @retval CHIP_ERROR_NO_MEMORY insufficient memory for endpoint |
| * |
| * @retval INET_ERROR_WRONG_PROTOCOL_TYPE |
| * \c addrType does not match \c IPVer. |
| * |
| * @retval INET_ERROR_WRONG_ADDRESS_TYPE |
| * \c addrType is \c IPAddressType::kAny, or the type of \c addr is not |
| * equal to \c addrType. |
| * |
| * @retval other another system or platform error |
| * |
| * @details |
| * Binds the endpoint to the specified network interface IP address. |
| * |
| * On LwIP, this method must not be called with the LwIP stack lock |
| * already acquired. |
| */ |
| CHIP_ERROR Bind(IPAddressType addrType, const IPAddress & addr, uint16_t port, bool reuseAddr = false); |
| |
| /** |
| * @brief Prepare the endpoint to receive TCP messages. |
| * |
| * @param[in] backlog maximum depth of connection acceptance queue |
| * |
| * @retval CHIP_NO_ERROR success: endpoint ready to receive messages. |
| * @retval CHIP_ERROR_INCORRECT_STATE endpoint is already listening. |
| * |
| * @details |
| * If \c mState is already \c State::kListening, then no operation is |
| * performed, otherwise the \c mState is set to \c State::kListening and |
| * the endpoint is prepared to received TCP messages, according to the |
| * semantics of the platform. |
| * |
| * On some platforms, the \c backlog argument is not used (the depth of |
| * the queue is fixed; only one connection may be accepted at a time). |
| * |
| * On LwIP systems, this method must not be called with the LwIP stack |
| * lock already acquired |
| */ |
| CHIP_ERROR Listen(uint16_t backlog); |
| |
| /** |
| * @brief Initiate a TCP connection. |
| * |
| * @param[in] addr the destination IP address |
| * @param[in] port the destination TCP port |
| * @param[in] intfId an optional network interface indicator |
| * |
| * @retval CHIP_NO_ERROR success: \c msg is queued for transmit. |
| * @retval CHIP_ERROR_NOT_IMPLEMENTED system implementation not complete. |
| * |
| * @retval INET_ERROR_WRONG_ADDRESS_TYPE |
| * the destination address and the bound interface address do not |
| * have matching protocol versions or address type, or the destination |
| * address is an IPv6 link-local address and \c intfId is not specified. |
| * |
| * @retval other another system or platform error |
| * |
| * @details |
| * If possible, then this method initiates a TCP connection to the |
| * destination \c addr (with \c intfId used as the scope |
| * identifier for IPv6 link-local destinations) and \c port. |
| */ |
| CHIP_ERROR Connect(const IPAddress & addr, uint16_t port, InterfaceId intfId = InterfaceId::Null()); |
| |
| /** |
| * @brief Extract IP address and TCP port of remote endpoint. |
| * |
| * @param[out] retAddr IP address of remote endpoint. |
| * @param[out] retPort TCP port of remote endpoint. |
| * |
| * @retval CHIP_NO_ERROR success: address and port extracted. |
| * @retval CHIP_ERROR_INCORRECT_STATE TCP connection not established. |
| * @retval CHIP_ERROR_CONNECTION_ABORTED TCP connection no longer open. |
| * |
| * @details |
| * Do not use \c nullptr for either argument. |
| */ |
| virtual CHIP_ERROR GetPeerInfo(IPAddress * retAddr, uint16_t * retPort) const = 0; |
| |
| /** |
| * @brief Extract IP address and TCP port of local endpoint. |
| * |
| * @param[out] retAddr IP address of local endpoint. |
| * @param[out] retPort TCP port of local endpoint. |
| * |
| * @retval CHIP_NO_ERROR success: address and port extracted. |
| * @retval CHIP_ERROR_INCORRECT_STATE TCP connection not established. |
| * @retval CHIP_ERROR_CONNECTION_ABORTED TCP connection no longer open. |
| * |
| * @details |
| * Do not use \c nullptr for either argument. |
| */ |
| virtual CHIP_ERROR GetLocalInfo(IPAddress * retAddr, uint16_t * retPort) const = 0; |
| |
| /** |
| * @brief Extract the interface id of the TCP endpoint. |
| * |
| * @param[out] retInterface The interface id. |
| * |
| * @retval CHIP_NO_ERROR success: address and port extracted. |
| * @retval CHIP_ERROR_INCORRECT_STATE TCP connection not established. |
| * @retval CHIP_ERROR_CONNECTION_ABORTED TCP connection no longer open. |
| */ |
| virtual CHIP_ERROR GetInterfaceId(InterfaceId * retInterface) = 0; |
| |
| /** |
| * @brief Send message text on TCP connection. |
| * |
| * @param[out] data Message text to send. |
| * @param[out] push If \c true, then send immediately, otherwise queue. |
| * |
| * @retval CHIP_NO_ERROR success: address and port extracted. |
| * @retval CHIP_ERROR_INCORRECT_STATE TCP connection not established. |
| */ |
| CHIP_ERROR Send(chip::System::PacketBufferHandle && data, bool push = true); |
| |
| /** |
| * Disable reception. |
| * |
| * Disable all event handlers. Data sent to an endpoint that disables |
| * reception will be acknowledged until the receive window is exhausted. |
| */ |
| void DisableReceive() { mReceiveEnabled = false; } |
| |
| /** |
| * Enable reception. |
| * |
| * Enable all event handlers. Data sent to an endpoint that disables |
| * reception will be acknowledged until the receive window is exhausted. |
| */ |
| void EnableReceive() |
| { |
| mReceiveEnabled = true; |
| DriveReceiving(); |
| } |
| |
| /** |
| * Switch off Nagle buffering algorithm. |
| */ |
| virtual CHIP_ERROR EnableNoDelay() = 0; |
| |
| /** |
| * @brief |
| * Enable TCP keepalive probes on the associated TCP connection. |
| * |
| * @param[in] interval |
| * The interval (in seconds) between keepalive probes. This value also controls |
| * the time between last data packet sent and the transmission of the first keepalive |
| * probe. |
| * |
| * @param[in] timeoutCount |
| * The maximum number of unacknowledged probes before the connection will be deemed |
| * to have failed. |
| * |
| * @retval CHIP_NO_ERROR success: address and port extracted. |
| * @retval CHIP_ERROR_INCORRECT_STATE TCP connection not established. |
| * @retval CHIP_ERROR_CONNECTION_ABORTED TCP connection no longer open. |
| * @retval CHIP_ERROR_NOT_IMPLEMENTED system implementation not complete. |
| * |
| * @retval other another system or platform error |
| * |
| * @note |
| * This method can only be called when the endpoint is in one of the connected states. |
| * |
| * This method can be called multiple times to adjust the keepalive interval or timeout |
| * count. |
| * |
| * @details |
| * Start automatically transmitting TCP "keep-alive" probe segments every |
| * \c interval seconds. The connection will abort automatically after |
| * receiving a negative response, or after sending \c timeoutCount |
| * probe segments without receiving a positive response. |
| * |
| * See RFC 1122, section 4.2.3.6 for specification details. |
| */ |
| virtual CHIP_ERROR EnableKeepAlive(uint16_t interval, uint16_t timeoutCount) = 0; |
| |
| /** |
| * @brief Disable the TCP "keep-alive" option. |
| * |
| * This method can only be called when the endpoint is in one of the connected states. |
| * This method does nothing if keepalives have not been enabled on the endpoint. |
| * |
| * @retval CHIP_NO_ERROR success: address and port extracted. |
| * @retval CHIP_ERROR_INCORRECT_STATE TCP connection not established. |
| * @retval CHIP_ERROR_CONNECTION_ABORTED TCP connection no longer open. |
| * @retval CHIP_ERROR_NOT_IMPLEMENTED system implementation not complete. |
| * |
| * @retval other another system or platform error |
| */ |
| virtual CHIP_ERROR DisableKeepAlive() = 0; |
| |
| /** |
| * @brief Acknowledge receipt of message text. |
| * |
| * @param[in] len number of bytes to acknowledge. |
| * |
| * @retval CHIP_NO_ERROR success: reception acknowledged. |
| * @retval CHIP_ERROR_INCORRECT_STATE TCP connection not established. |
| * @retval CHIP_ERROR_CONNECTION_ABORTED TCP connection no longer open. |
| * |
| * @details |
| * Use this method to acknowledge reception of all or part of the data |
| * received. The operational semantics are undefined if \c len is larger |
| * than the total outstanding unacknowledged received data. |
| */ |
| virtual CHIP_ERROR AckReceive(uint16_t len) = 0; |
| |
| /** |
| * @brief Set the receive queue, for testing. |
| * |
| * @param[out] data Message text to push. |
| * |
| * @retval CHIP_NO_ERROR success: reception acknowledged. |
| * @retval CHIP_ERROR_INCORRECT_STATE TCP connection not established. |
| * |
| * @details |
| * This method may only be called by data reception event handlers to |
| * put data on the receive queue for unit test purposes. |
| */ |
| CHIP_ERROR SetReceivedDataForTesting(chip::System::PacketBufferHandle && data); |
| |
| /** |
| * @brief Extract the length of the data awaiting first transmit. |
| * |
| * @return Number of untransmitted bytes in the transmit queue. |
| */ |
| uint32_t PendingSendLength(); |
| |
| /** |
| * @brief Extract the length of the unacknowledged receive data. |
| * |
| * @return Number of bytes in the receive queue that have not yet been |
| * acknowledged with <tt>AckReceive(uint16_t len)</tt>. |
| */ |
| uint32_t PendingReceiveLength(); |
| |
| /** |
| * @brief Initiate TCP half close, in other words, finished with sending. |
| */ |
| void Shutdown(); |
| |
| /** |
| * @brief Initiate TCP full close, in other words, finished with both send and |
| * receive. |
| */ |
| void Close(); |
| |
| /** |
| * @brief Abortively close the endpoint, in other words, send RST packets. |
| */ |
| void Abort(); |
| |
| /** |
| * @brief Initiate (or continue) TCP full close, ignoring errors. |
| * |
| * @details |
| * The object is returned to the free pool, and all remaining user |
| * references are subsequently invalid. |
| */ |
| void Free(); |
| |
| /** |
| * @brief Extract whether TCP connection is established. |
| */ |
| bool IsConnected() const { return IsConnected(mState); } |
| |
| /** |
| * Set timeout for Connect to succeed or return an error. |
| */ |
| void SetConnectTimeout(const uint32_t connTimeoutMsecs) { mConnectTimeoutMsecs = connTimeoutMsecs; } |
| |
| #if INET_TCP_IDLE_CHECK_INTERVAL > 0 |
| /** |
| * @brief Set timer event for idle activity. |
| * |
| * @param[in] timeoutMS The timeout in milliseconds |
| * |
| * @details |
| * Set the idle timer interval to \c timeoutMS milliseconds. A zero |
| * time interval implies the idle timer is disabled. |
| */ |
| void SetIdleTimeout(uint32_t timeoutMS); |
| #endif // INET_TCP_IDLE_CHECK_INTERVAL > 0 |
| |
| /** |
| * @brief Note activity, in other words, reset the idle timer. |
| * |
| * @details |
| * Reset the idle timer to zero. |
| */ |
| void MarkActive() |
| { |
| #if INET_TCP_IDLE_CHECK_INTERVAL > 0 |
| mRemainingIdleTime = mIdleTimeout; |
| #endif // INET_TCP_IDLE_CHECK_INTERVAL > 0 |
| } |
| |
| /** |
| * @brief Set the TCP TCP_USER_TIMEOUT socket option. |
| * |
| * @param[in] userTimeoutMillis Tcp user timeout value in milliseconds. |
| * |
| * @retval CHIP_NO_ERROR success: address and port extracted. |
| * @retval CHIP_ERROR_NOT_IMPLEMENTED system implementation not complete. |
| * |
| * @retval other another system or platform error |
| * |
| * @details |
| * When the value is greater than 0, it specifies the maximum amount of |
| * time in milliseconds that transmitted data may remain |
| * unacknowledged before TCP will forcibly close the |
| * corresponding connection. If the option value is specified as 0, |
| * TCP will to use the system default. |
| * See RFC 5482, for further details. |
| * |
| * @note |
| * This method can only be called when the endpoint is in one of the connected states. |
| * |
| * This method can be called multiple times to adjust the keepalive interval or timeout |
| * count. |
| */ |
| CHIP_ERROR SetUserTimeout(uint32_t userTimeoutMillis); |
| |
| /** |
| * @brief Type of connection establishment event handling function. |
| * |
| * @param[in] endPoint The TCP endpoint associated with the event. |
| * @param[in] err \c CHIP_NO_ERROR if success, else another code. |
| * |
| * @details |
| * Provide a function of this type to the \c OnConnectComplete delegate |
| * member to process connection establishment events on \c endPoint. The |
| * \c err argument distinguishes successful connections from failures. |
| */ |
| typedef void (*OnConnectCompleteFunct)(TCPEndPoint * endPoint, CHIP_ERROR err); |
| |
| /** |
| * The endpoint's connection establishment event handling function |
| * delegate. |
| */ |
| OnConnectCompleteFunct OnConnectComplete; |
| |
| /** |
| * @brief Type of data reception event handling function. |
| * |
| * @param[in] endPoint The TCP endpoint associated with the event. |
| * @param[in] data The data received. |
| * |
| * @retval CHIP_NO_ERROR If the received data can be handled by higher layers. |
| * @retval other If the received data can not be used, and higher layers will not see it. |
| * |
| * @details |
| * Provide a function of this type to the \c OnDataReceived delegate |
| * member to process data reception events on \c endPoint where \c data |
| * is the message text received. |
| * |
| * If this function returns an error, the connection will be closed, since higher layers |
| * are not able to process the data for a better response. |
| */ |
| typedef CHIP_ERROR (*OnDataReceivedFunct)(TCPEndPoint * endPoint, chip::System::PacketBufferHandle && data); |
| |
| /** |
| * The endpoint's message text reception event handling function delegate. |
| */ |
| OnDataReceivedFunct OnDataReceived; |
| |
| /** |
| * @brief Type of data transmission event handling function. |
| * |
| * @param[in] endPoint The TCP endpoint associated with the event. |
| * @param[in] len Number of bytes added to the transmit window. |
| * |
| * @details |
| * Provide a function of this type to the \c OnDataSent delegate |
| * member to process data transmission events on \c endPoint where \c len |
| * is the length of the message text added to the TCP transmit window, |
| * which are eligible for sending by the underlying network stack. |
| */ |
| typedef void (*OnDataSentFunct)(TCPEndPoint * endPoint, uint16_t len); |
| |
| /** |
| * The endpoint's message text transmission event handling function |
| * delegate. |
| */ |
| OnDataSentFunct OnDataSent; |
| |
| /** |
| * @brief Type of connection establishment event handling function. |
| * |
| * @param[in] endPoint The TCP endpoint associated with the event. |
| * @param[in] err \c CHIP_NO_ERROR if success, else another code. |
| * |
| * @details |
| * Provide a function of this type to the \c OnConnectionClosed delegate |
| * member to process connection termination events on \c endPoint. The |
| * \c err argument distinguishes successful terminations from failures. |
| */ |
| typedef void (*OnConnectionClosedFunct)(TCPEndPoint * endPoint, CHIP_ERROR err); |
| |
| /** The endpoint's close event handling function delegate. */ |
| OnConnectionClosedFunct OnConnectionClosed; |
| |
| /** |
| * @brief Type of half-close reception event handling function. |
| * |
| * @param[in] endPoint The TCP endpoint associated with the event. |
| * |
| * @details |
| * Provide a function of this type to the \c OnPeerClose delegate member |
| * to process connection termination events on \c endPoint. |
| */ |
| typedef void (*OnPeerCloseFunct)(TCPEndPoint * endPoint); |
| |
| /** The endpoint's half-close receive event handling function delegate. */ |
| OnPeerCloseFunct OnPeerClose; |
| |
| /** |
| * @brief Type of connection received event handling function. |
| * |
| * @param[in] listeningEndPoint The listening TCP endpoint. |
| * @param[in] conEndPoint The newly received TCP endpoint. |
| * @param[in] peerAddr The IP address of the remote peer. |
| * @param[in] peerPort The TCP port of the remote peer. |
| * |
| * @details |
| * Provide a function of this type to the \c OnConnectionReceived delegate |
| * member to process connection reception events on \c listeningEndPoint. |
| * The newly received endpoint \c conEndPoint is located at IP address |
| * \c peerAddr and TCP port \c peerPort. |
| */ |
| typedef void (*OnConnectionReceivedFunct)(TCPEndPoint * listeningEndPoint, TCPEndPoint * conEndPoint, |
| const IPAddress & peerAddr, uint16_t peerPort); |
| |
| /** The endpoint's connection receive event handling function delegate. */ |
| OnConnectionReceivedFunct OnConnectionReceived; |
| |
| /** |
| * @brief Type of connection acceptance error event handling function. |
| * |
| * @param[in] endPoint The TCP endpoint associated with the event. |
| * @param[in] err The reason for the error. |
| * |
| * @details |
| * Provide a function of this type to the \c OnAcceptError delegate |
| * member to process connection acceptance error events on \c endPoint. The |
| * \c err argument provides specific detail about the type of the error. |
| */ |
| typedef void (*OnAcceptErrorFunct)(TCPEndPoint * endPoint, CHIP_ERROR err); |
| |
| /** |
| * The endpoint's connection acceptance event handling function delegate. |
| */ |
| OnAcceptErrorFunct OnAcceptError; |
| |
| /** |
| * Size of the largest TCP packet that can be received. |
| */ |
| constexpr static size_t kMaxReceiveMessageSize = System::PacketBuffer::kMaxSizeWithoutReserve; |
| |
| protected: |
| friend class ::chip::Transport::TCPTest; |
| friend class TCPTest; |
| |
| TCPEndPoint(EndPointManager<TCPEndPoint> & endPointManager) : |
| EndPointBasis(endPointManager), OnConnectComplete(nullptr), OnDataReceived(nullptr), OnDataSent(nullptr), |
| OnConnectionClosed(nullptr), OnPeerClose(nullptr), OnConnectionReceived(nullptr), OnAcceptError(nullptr), |
| mState(State::kReady), mReceiveEnabled(true), mConnectTimeoutMsecs(0) // Initialize to zero for using system defaults. |
| #if INET_CONFIG_OVERRIDE_SYSTEM_TCP_USER_TIMEOUT |
| , |
| mUserTimeoutMillis(INET_CONFIG_DEFAULT_TCP_USER_TIMEOUT_MSEC), mUserTimeoutTimerRunning(false) |
| #endif // INET_CONFIG_OVERRIDE_SYSTEM_TCP_USER_TIMEOUT |
| {} |
| |
| virtual ~TCPEndPoint() = default; |
| |
| /** |
| * Basic dynamic state of the underlying endpoint. |
| * |
| * Objects are initialized in the "ready" state, proceed to subsequent |
| * states corresponding to a simplification of the states of the TCP |
| * transport state machine. |
| */ |
| enum class State : uint8_t |
| { |
| kReady = 0, /**< Endpoint initialized, but not bound. */ |
| kBound = 1, /**< Endpoint bound, but not listening. */ |
| kListening = 2, /**< Endpoint receiving connections. */ |
| kConnecting = 3, /**< Endpoint attempting to connect. */ |
| kConnected = 4, /**< Endpoint connected, ready for tx/rx. */ |
| kSendShutdown = 5, /**< Endpoint initiated its half-close. */ |
| kReceiveShutdown = 6, /**< Endpoint responded to half-close. */ |
| kClosing = 7, /**< Endpoint closing bidirectionally. */ |
| kClosed = 8 /**< Endpoint closed, ready for release. */ |
| } mState; |
| |
| /** Control switch indicating whether the application is receiving data. */ |
| bool mReceiveEnabled; |
| |
| chip::System::PacketBufferHandle mRcvQueue; |
| chip::System::PacketBufferHandle mSendQueue; |
| #if INET_TCP_IDLE_CHECK_INTERVAL > 0 |
| static void HandleIdleTimer(System::Layer * aSystemLayer, void * aAppState); |
| static bool IsIdleTimerRunning(EndPointManager<TCPEndPoint> & endPointManager); |
| uint16_t mIdleTimeout; // in units of INET_TCP_IDLE_CHECK_INTERVAL; zero means no timeout |
| uint16_t mRemainingIdleTime; // in units of INET_TCP_IDLE_CHECK_INTERVAL |
| #endif // INET_TCP_IDLE_CHECK_INTERVAL > 0 |
| |
| uint32_t mConnectTimeoutMsecs; // This is the timeout to wait for a Connect call to succeed or |
| // return an error; zero means use system defaults. |
| |
| #if INET_CONFIG_OVERRIDE_SYSTEM_TCP_USER_TIMEOUT |
| uint32_t mUserTimeoutMillis; // The configured TCP user timeout value in milliseconds. |
| // If 0, assume not set. |
| bool mUserTimeoutTimerRunning; // Indicates whether the TCP UserTimeout timer has been started. |
| |
| static void TCPUserTimeoutHandler(chip::System::Layer * aSystemLayer, void * aAppState); |
| virtual void TCPUserTimeoutHandler() = 0; |
| |
| void StartTCPUserTimeoutTimer(); |
| void StopTCPUserTimeoutTimer(); |
| void RestartTCPUserTimeoutTimer(); |
| void ScheduleNextTCPUserTimeoutPoll(uint32_t aTimeOut); |
| #endif // INET_CONFIG_OVERRIDE_SYSTEM_TCP_USER_TIMEOUT |
| |
| TCPEndPoint(const TCPEndPoint &) = delete; |
| |
| CHIP_ERROR DriveSending(); |
| void DriveReceiving(); |
| void HandleConnectComplete(CHIP_ERROR err); |
| void HandleAcceptError(CHIP_ERROR err); |
| void DoClose(CHIP_ERROR err, bool suppressCallback); |
| static bool IsConnected(State state); |
| |
| static void TCPConnectTimeoutHandler(chip::System::Layer * aSystemLayer, void * aAppState); |
| |
| void StartConnectTimerIfSet(); |
| void StopConnectTimer(); |
| |
| friend class TCPEndPointDeletor; |
| |
| /* |
| * Implementation helpers for shared methods. |
| */ |
| virtual CHIP_ERROR BindImpl(IPAddressType addrType, const IPAddress & addr, uint16_t port, bool reuseAddr) = 0; |
| virtual CHIP_ERROR ListenImpl(uint16_t backlog) = 0; |
| virtual CHIP_ERROR ConnectImpl(const IPAddress & addr, uint16_t port, InterfaceId intfId) = 0; |
| virtual CHIP_ERROR SendQueuedImpl(bool queueWasEmpty) = 0; |
| virtual CHIP_ERROR SetUserTimeoutImpl(uint32_t userTimeoutMillis) = 0; |
| virtual CHIP_ERROR DriveSendingImpl() = 0; |
| virtual void HandleConnectCompleteImpl() = 0; |
| virtual void DoCloseImpl(CHIP_ERROR err, State oldState) = 0; |
| }; |
| |
| template <> |
| struct EndPointProperties<TCPEndPoint> |
| { |
| static constexpr char kName[] = "TCP"; |
| static constexpr size_t kNumEndPoints = INET_CONFIG_NUM_TCP_ENDPOINTS; |
| static constexpr int kSystemStatsKey = System::Stats::kInetLayer_NumTCPEps; |
| }; |
| |
| } // namespace Inet |
| } // namespace chip |
