1472N/A Implementation of TCP4 protocol services. 342N/ACopyright (c) 2005 - 2011, Intel Corporation. All rights reserved.<BR> 342N/AThis program and the accompanying materials 342N/Aare licensed and made available under the terms and conditions of the BSD License 342N/Awhich accompanies this distribution. The full text of the license may be found at 342N/ATHE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 342N/AWITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 1472N/A Check the integrity of the data buffer. 342N/A @param DataLen The total length of the data buffer. 342N/A @param FragmentCount The fragment count of the fragment table. 342N/A @param FragmentTable Pointer to the fragment table of the data 1879N/A @retval EFI_SUCCESS The integrity check is passed. 1879N/A @retval EFI_INVALID_PARAMETER The integrity check is failed. 1044N/A Get the current operational status. 1044N/A The GetModeData() function copies the current operational settings of this 1044N/A EFI TCPv4 Protocol instance into user-supplied buffers. This function can 342N/A also be used to retrieve the operational setting of underlying drivers 342N/A such as IPv4, MNP, or SNP. 342N/A @param This Pointer to the EFI_TCP4_PROTOCOL instance. 342N/A @param Tcp4State Pointer to the buffer to receive the current TCP 342N/A @param Tcp4ConfigData Pointer to the buffer to receive the current TCP 342N/A @param Ip4ModeData Pointer to the buffer to receive the current IPv4 342N/A configuration data used by the TCPv4 instance. 751N/A @param MnpConfigData Pointer to the buffer to receive the current MNP 342N/A configuration data indirectly used by the TCPv4 884N/A @param SnpModeData Pointer to the buffer to receive the current SNP 884N/A configuration data indirectly used by the TCPv4 884N/A @retval EFI_SUCCESS The mode data was read. 884N/A @retval EFI_NOT_STARTED No configuration data is available because this 751N/A instance hasn't been started. 342N/A @retval EFI_INVALID_PARAMETER This is NULL. 1282N/A Initialize or brutally reset the operational parameters for 342N/A this EFI TCPv4 instance. 342N/A The Configure() function does the following: 342N/A * Initialize this EFI TCPv4 instance, i.e., initialize the communication end 342N/A setting, specify active open or passive open for an instance. 342N/A * Reset this TCPv4 instance brutally, i.e., cancel all pending asynchronous 342N/A tokens, flush transmission and receiving buffer directly without informing 342N/A the communication peer. 342N/A No other TCPv4 Protocol operation can be executed by this instance 342N/A until it is configured properly. For an active TCP4 instance, after a proper 342N/A configuration it may call Connect() to initiates the three-way handshake. 616N/A For a passive TCP4 instance, its state will transit to Tcp4StateListen after 616N/A configuration, and Accept() may be called to listen the incoming TCP connection 616N/A request. If TcpConfigData is set to NULL, the instance is reset. Resetting 342N/A process will be done brutally, the state machine will be set to Tcp4StateClosed 342N/A directly, the receive queue and transmit queue will be flushed, and no traffic is 342N/A allowed through this instance. 342N/A @param This Pointer to the EFI_TCP4_PROTOCOL instance. 342N/A @param TcpConfigData Pointer to the configure data to configure the 342N/A @retval EFI_SUCCESS The operational settings are set, changed, or 342N/A @retval EFI_NO_MAPPING When using a default address, configuration 342N/A (through DHCP, BOOTP, RARP, etc.) is not 342N/A @retval EFI_INVALID_PARAMETER One or more parameters are invalid. 342N/A @retval EFI_ACCESS_DENIED Configuring TCP instance when it is already 342N/A @retval EFI_DEVICE_ERROR An unexpected network or system error occurred. 342N/A @retval EFI_UNSUPPORTED One or more of the control options are not 342N/A supported in the implementation. 342N/A @retval EFI_OUT_OF_RESOURCES Could not allocate enough system resources. 1111N/A // Tcp protocol related parameter check will be conducted here 342N/A Add or delete routing entries. 342N/A The Routes() function adds or deletes a route from the instance's routing table. 342N/A The most specific route is selected by comparing the SubnetAddress with the 342N/A destination IP address's arithmetical AND to the SubnetMask. 342N/A The default route is added with both SubnetAddress and SubnetMask set to 0.0.0.0. 342N/A The default route matches all destination IP addresses if there is no more specific route. 342N/A Direct route is added with GatewayAddress set to 0.0.0.0. Packets are sent to 342N/A the destination host if its address can be found in the Address Resolution Protocol (ARP) 342N/A cache or it is on the local subnet. If the instance is configured to use default 342N/A address, a direct route to the local network will be added automatically. 342N/A Each TCP instance has its own independent routing table. Instance that uses the 342N/A default IP address will have a copy of the EFI_IP4_CONFIG_PROTOCOL's routing table. 342N/A The copy will be updated automatically whenever the IP driver reconfigures its 342N/A instance. As a result, the previous modification to the instance's local copy 342N/A will be lost. The priority of checking the route table is specific with IP 1282N/A implementation and every IP implementation must comply with RFC 1122. 342N/A @param This Pointer to the EFI_TCP4_PROTOCOL instance. 342N/A @param DeleteRoute If TRUE, delete the specified route from routing 1282N/A table; if FALSE, add the specified route to 342N/A DestinationAddress and SubnetMask are used as 342N/A the keywords to search route entry. 342N/A @param SubnetAddress The destination network. 342N/A @param SubnetMask The subnet mask for the destination network. 342N/A @param GatewayAddress The gateway address for this route. 342N/A It must be on the same subnet with the station 342N/A address unless a direct route is specified. 1087N/A @retval EFI_SUCCESS The operation completed successfully. 1087N/A @retval EFI_NOT_STARTED The EFI_TCP4_PROTOCOL instance has not been 1087N/A @retval EFI_NO_MAPPING When using a default address, configuration 751N/A (through DHCP, BOOTP, RARP, etc.) is not 545N/A @retval EFI_INVALID_PARAMETER One or more parameters are invalid. 751N/A @retval EFI_OUT_OF_RESOURCES Could not allocate enough resources to add the 545N/A entry to the routing table. 545N/A @retval EFI_NOT_FOUND This route is not in the routing table. 751N/A @retval EFI_ACCESS_DENIED This route is already in the routing table. 545N/A @retval EFI_UNSUPPORTED The TCP driver does not support this operation. 342N/A Initiate a nonblocking TCP connection request for an active TCP instance. 1879N/A The Connect() function will initiate an active open to the remote peer configured 1879N/A in current TCP instance if it is configured active. If the connection succeeds or fails due to any error, the ConnectionToken->CompletionToken.Event will be signaled and ConnectionToken->CompletionToken.Status will be updated accordingly. This function can only be called for the TCP instance in Tcp4StateClosed state. The instance will transfer into Tcp4StateSynSent if the function returns EFI_SUCCESS. If TCP three way handshake succeeds, its state will become Tcp4StateEstablished, otherwise, the state will return to Tcp4StateClosed. @param This Pointer to the EFI_TCP4_PROTOCOL instance @param ConnectionToken Pointer to the connection token to return when the TCP three way handshake finishes. @retval EFI_SUCCESS The connection request is successfully initiated and the state of this TCPv4 instance has been changed to Tcp4StateSynSent. @retval EFI_NOT_STARTED This EFI_TCP4_PROTOCOL instance hasn't been @retval EFI_ACCESS_DENIED The instance is not configured as an active one or it is not in Tcp4StateClosed state. @retval EFI_INVALID_PARAMETER One or more parameters are invalid. @retval EFI_OUT_OF_RESOURCES The driver can't allocate enough resource to initiate the active open. @retval EFI_DEVICE_ERROR An unexpected system or network error occurred. Listen on the passive instance to accept an incoming connection request. The Accept() function initiates an asynchronous accept request to wait for an incoming connection on the passive TCP instance. If a remote peer successfully establishes a connection with this instance, a new TCP instance will be created and its handle will be returned in ListenToken->NewChildHandle. The newly created instance is configured by inheriting the passive instance's configuration and is ready for use upon return. The instance is in the Tcp4StateEstablished state. The ListenToken->CompletionToken.Event will be signaled when a new connection is accepted, user aborts the listen or connection is reset. This function only can be called when current TCP instance is in Tcp4StateListen state. @param This Pointer to the EFI_TCP4_PROTOCOL instance @param ListenToken Pointer to the listen token to return when @retval EFI_SUCCESS The listen token has been queued successfully. @retval EFI_NOT_STARTED The EFI_TCP4_PROTOCOL instance hasn't been @retval EFI_ACCESS_DENIED The instatnce is not a passive one or it is not in Tcp4StateListen state or a same listen token has already existed in the listen token queue of @retval EFI_INVALID_PARAMETER One or more parameters are invalid. @retval EFI_OUT_OF_RESOURCES Could not allocate enough resources to finish @retval EFI_DEVICE_ERROR Any unexpected and not belonged to above category error. Queues outgoing data into the transmit queue. The Transmit() function queues a sending request to this TCPv4 instance along with the user data. The status of the token is updated and the event in the token will be signaled once the data is sent out or some error occurs. @param This Pointer to the EFI_TCP4_PROTOCOL instance @param Token Pointer to the completion token to queue to the @retval EFI_SUCCESS The data has been queued for transmission. @retval EFI_NOT_STARTED The EFI_TCP4_PROTOCOL instance hasn't been @retval EFI_NO_MAPPING When using a default address, configuration (DHCP, BOOTP, RARP, etc.) is not finished yet. @retval EFI_INVALID_PARAMETER One or more parameters are invalid. @retval EFI_ACCESS_DENIED One or more of the following conditions is TRUE: * A transmit completion token with the same Token-> CompletionToken.Event was already in the * The current instance is in Tcp4StateClosed state * The current instance is a passive one and it is in Tcp4StateListen state. * User has called Close() to disconnect this @retval EFI_NOT_READY The completion token could not be queued because the transmit queue is full. @retval EFI_OUT_OF_RESOURCES Could not queue the transmit data because of @retval EFI_NETWORK_UNREACHABLE There is no route to the destination network or Place an asynchronous receive request into the receiving queue. The Receive() function places a completion token into the receive packet queue. This function is always asynchronous. The caller must allocate the Token->CompletionToken.Event and the FragmentBuffer used to receive data. He also must fill the DataLength which represents the whole length of all FragmentBuffer. When the receive operation completes, the EFI TCPv4 Protocol driver updates the Token->CompletionToken.Status and Token->Packet.RxData fields and the Token->CompletionToken.Event is signaled. If got data the data and its length will be copy into the FragmentTable, in the same time the full length of received data will be recorded in the DataLength fields. Providing a proper notification function and context for the event will enable the user to receive the notification and receiving status. That notification function is guaranteed to not be re-entered. @param This Pointer to the EFI_TCP4_PROTOCOL instance. @param Token Pointer to a token that is associated with the @retval EFI_SUCCESS The receive completion token was cached. @retval EFI_NOT_STARTED The EFI_TCP4_PROTOCOL instance hasn't been @retval EFI_NO_MAPPING When using a default address, configuration (DHCP, BOOTP, RARP, etc.) is not finished yet. @retval EFI_INVALID_PARAMETER One or more parameters are invalid. @retval EFI_OUT_OF_RESOURCES The receive completion token could not be queued due to a lack of system resources. @retval EFI_DEVICE_ERROR An unexpected system or network error occurred. The EFI TCPv4 Protocol instance has been reset @retval EFI_ACCESS_DENIED One or more of the following conditions is TRUE: * A receive completion token with the same Token->CompletionToken.Event was already in * The current instance is in Tcp4StateClosed state. * The current instance is a passive one and it is in Tcp4StateListen state. * User has called Close() to disconnect this @retval EFI_CONNECTION_FIN The communication peer has closed the connection and there is no any buffered data in the receive @retval EFI_NOT_READY The receive request could not be queued because the receive queue is full. Disconnecting a TCP connection gracefully or reset a TCP connection. Initiate an asynchronous close token to TCP driver. After Close() is called, any buffered transmission data will be sent by TCP driver and the current instance will have a graceful close working flow described as RFC 793 if AbortOnClose is set to FALSE, otherwise, a rest packet will be sent by TCP driver to fast disconnect this connection. When the close operation completes successfully the TCP instance is in Tcp4StateClosed state, all pending asynchronous operation is signaled and any buffers used for TCP network traffic @param This Pointer to the EFI_TCP4_PROTOCOL instance. @param CloseToken Pointer to the close token to return when @retval EFI_SUCCESS The operation completed successfully. @retval EFI_NOT_STARTED The EFI_TCP4_PROTOCOL instance hasn't been @retval EFI_ACCESS_DENIED One or more of the following are TRUE: * Configure() has been called with TcpConfigData set to NULL and this function has not returned. * Previous Close() call on this instance has not @retval EFI_INVALID_PARAMETER One ore more parameters are invalid. @retval EFI_OUT_OF_RESOURCES Could not allocate enough resource to finish the @retval EFI_DEVICE_ERROR Any unexpected and not belonged to above Abort an asynchronous connection, listen, transmission or receive request. The Cancel() function aborts a pending connection, listen, transmit or receive request. If Token is not NULL and the token is in the connection, listen, transmission or receive queue when it is being cancelled, its Token->Status will be set to EFI_ABORTED and then Token->Event will be signaled. If the token is not in one of the queues, which usually means that the asynchronous operation has completed, EFI_NOT_FOUND is returned. If Token is NULL all asynchronous token issued by Connect(), Accept(), Transmit() and Receive()will be aborted. NOTE: It has not been implemented currently. @param This Pointer to the EFI_TCP4_PROTOCOL instance. @param Token Pointer to a token that has been issued by Connect(), Accept(), Transmit() or Receive(). If NULL, all pending tokens issued by above four functions will be aborted. @retval EFI_SUCCESS The asynchronous I/O request is aborted and Token->Event @retval EFI_INVALID_PARAMETER This is NULL. @retval EFI_NOT_STARTED This instance hasn's been configured. @retval EFI_NO_MAPPING When using the default address, configuration (DHCP, BOOTP,RARP, etc.) hasn's finished yet. @retval EFI_NOT_FOUND The asynchronous I/O request isn's found in the transmission or receive queue. It has either completed or wasn's issued by Transmit() and Receive(). @retval EFI_UNSUPPORTED The operation is not supported in current Poll to receive incoming data and transmit outgoing segments. The Poll() function increases the rate that data is moved between the network and application and can be called when the TCP instance is created successfully. Its use is optional. In some implementations, the periodical timer in the MNP driver may not poll the underlying communications device fast enough to avoid drop packets. Drivers and applications that are experiencing packet loss should try calling the Poll() function in a high frequency. @param This Pointer to the EFI_TCP4_PROTOCOL instance. @retval EFI_SUCCESS Incoming or outgoing data was processed. @retval EFI_INVALID_PARAMETER This is NULL. @retval EFI_DEVICE_ERROR An unexpected system or network error occurred. @retval EFI_NOT_READY No incoming or outgoing data was processed. @retval EFI_TIMEOUT Data was dropped out of the transmission or receive queue. Consider increasing the polling