1 /** @file 2 EFI TCPv4(Transmission Control Protocol version 4) Protocol Definition 3 The EFI TCPv4 Service Binding Protocol is used to locate EFI TCPv4 Protocol drivers to create 4 and destroy child of the driver to communicate with other host using TCP protocol. 5 The EFI TCPv4 Protocol provides services to send and receive data stream. 6 7 Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR> 8 SPDX-License-Identifier: BSD-2-Clause-Patent 9 10 @par Revision Reference: 11 This Protocol is introduced in UEFI Specification 2.0. 12 13 **/ 14 15 #ifndef __EFI_TCP4_PROTOCOL_H__ 16 #define __EFI_TCP4_PROTOCOL_H__ 17 18 #include <Protocol/Ip4.h> 19 20 #define EFI_TCP4_SERVICE_BINDING_PROTOCOL_GUID \ 21 { \ 22 0x00720665, 0x67EB, 0x4a99, {0xBA, 0xF7, 0xD3, 0xC3, 0x3A, 0x1C, 0x7C, 0xC9 } \ 23 } 24 25 #define EFI_TCP4_PROTOCOL_GUID \ 26 { \ 27 0x65530BC7, 0xA359, 0x410f, {0xB0, 0x10, 0x5A, 0xAD, 0xC7, 0xEC, 0x2B, 0x62 } \ 28 } 29 30 typedef struct _EFI_TCP4_PROTOCOL EFI_TCP4_PROTOCOL; 31 32 /// 33 /// EFI_TCP4_SERVICE_POINT is deprecated in the UEFI 2.4B and should not be used any more. 34 /// The definition in here is only present to provide backwards compatability. 35 /// 36 typedef struct { 37 EFI_HANDLE InstanceHandle; 38 EFI_IPv4_ADDRESS LocalAddress; 39 UINT16 LocalPort; 40 EFI_IPv4_ADDRESS RemoteAddress; 41 UINT16 RemotePort; 42 } EFI_TCP4_SERVICE_POINT; 43 44 /// 45 /// EFI_TCP4_VARIABLE_DATA is deprecated in the UEFI 2.4B and should not be used any more. 46 /// The definition in here is only present to provide backwards compatability. 47 /// 48 typedef struct { 49 EFI_HANDLE DriverHandle; 50 UINT32 ServiceCount; 51 EFI_TCP4_SERVICE_POINT Services[1]; 52 } EFI_TCP4_VARIABLE_DATA; 53 54 typedef struct { 55 BOOLEAN UseDefaultAddress; 56 EFI_IPv4_ADDRESS StationAddress; 57 EFI_IPv4_ADDRESS SubnetMask; 58 UINT16 StationPort; 59 EFI_IPv4_ADDRESS RemoteAddress; 60 UINT16 RemotePort; 61 BOOLEAN ActiveFlag; 62 } EFI_TCP4_ACCESS_POINT; 63 64 typedef struct { 65 UINT32 ReceiveBufferSize; 66 UINT32 SendBufferSize; 67 UINT32 MaxSynBackLog; 68 UINT32 ConnectionTimeout; 69 UINT32 DataRetries; 70 UINT32 FinTimeout; 71 UINT32 TimeWaitTimeout; 72 UINT32 KeepAliveProbes; 73 UINT32 KeepAliveTime; 74 UINT32 KeepAliveInterval; 75 BOOLEAN EnableNagle; 76 BOOLEAN EnableTimeStamp; 77 BOOLEAN EnableWindowScaling; 78 BOOLEAN EnableSelectiveAck; 79 BOOLEAN EnablePathMtuDiscovery; 80 } EFI_TCP4_OPTION; 81 82 typedef struct { 83 // 84 // I/O parameters 85 // 86 UINT8 TypeOfService; 87 UINT8 TimeToLive; 88 89 // 90 // Access Point 91 // 92 EFI_TCP4_ACCESS_POINT AccessPoint; 93 94 // 95 // TCP Control Options 96 // 97 EFI_TCP4_OPTION *ControlOption; 98 } EFI_TCP4_CONFIG_DATA; 99 100 /// 101 /// TCP4 connnection state 102 /// 103 typedef enum { 104 Tcp4StateClosed = 0, 105 Tcp4StateListen = 1, 106 Tcp4StateSynSent = 2, 107 Tcp4StateSynReceived = 3, 108 Tcp4StateEstablished = 4, 109 Tcp4StateFinWait1 = 5, 110 Tcp4StateFinWait2 = 6, 111 Tcp4StateClosing = 7, 112 Tcp4StateTimeWait = 8, 113 Tcp4StateCloseWait = 9, 114 Tcp4StateLastAck = 10 115 } EFI_TCP4_CONNECTION_STATE; 116 117 typedef struct { 118 EFI_EVENT Event; 119 EFI_STATUS Status; 120 } EFI_TCP4_COMPLETION_TOKEN; 121 122 typedef struct { 123 /// 124 /// The Status in the CompletionToken will be set to one of 125 /// the following values if the active open succeeds or an unexpected 126 /// error happens: 127 /// EFI_SUCCESS: The active open succeeds and the instance's 128 /// state is Tcp4StateEstablished. 129 /// EFI_CONNECTION_RESET: The connect fails because the connection is reset 130 /// either by instance itself or the communication peer. 131 /// EFI_CONNECTION_REFUSED: The connect fails because this connection is initiated with 132 /// an active open and the connection is refused. 133 /// EFI_ABORTED: The active open is aborted. 134 /// EFI_TIMEOUT: The connection establishment timer expires and 135 /// no more specific information is available. 136 /// EFI_NETWORK_UNREACHABLE: The active open fails because 137 /// an ICMP network unreachable error is received. 138 /// EFI_HOST_UNREACHABLE: The active open fails because an 139 /// ICMP host unreachable error is received. 140 /// EFI_PROTOCOL_UNREACHABLE: The active open fails 141 /// because an ICMP protocol unreachable error is received. 142 /// EFI_PORT_UNREACHABLE: The connection establishment 143 /// timer times out and an ICMP port unreachable error is received. 144 /// EFI_ICMP_ERROR: The connection establishment timer timeout and some other ICMP 145 /// error is received. 146 /// EFI_DEVICE_ERROR: An unexpected system or network error occurred. 147 /// EFI_NO_MEDIA: There was a media error. 148 /// 149 EFI_TCP4_COMPLETION_TOKEN CompletionToken; 150 } EFI_TCP4_CONNECTION_TOKEN; 151 152 typedef struct { 153 EFI_TCP4_COMPLETION_TOKEN CompletionToken; 154 EFI_HANDLE NewChildHandle; 155 } EFI_TCP4_LISTEN_TOKEN; 156 157 typedef struct { 158 UINT32 FragmentLength; 159 VOID *FragmentBuffer; 160 } EFI_TCP4_FRAGMENT_DATA; 161 162 typedef struct { 163 BOOLEAN UrgentFlag; 164 UINT32 DataLength; 165 UINT32 FragmentCount; 166 EFI_TCP4_FRAGMENT_DATA FragmentTable[1]; 167 } EFI_TCP4_RECEIVE_DATA; 168 169 typedef struct { 170 BOOLEAN Push; 171 BOOLEAN Urgent; 172 UINT32 DataLength; 173 UINT32 FragmentCount; 174 EFI_TCP4_FRAGMENT_DATA FragmentTable[1]; 175 } EFI_TCP4_TRANSMIT_DATA; 176 177 typedef struct { 178 /// 179 /// When transmission finishes or meets any unexpected error it will 180 /// be set to one of the following values: 181 /// EFI_SUCCESS: The receiving or transmission operation 182 /// completes successfully. 183 /// EFI_CONNECTION_FIN: The receiving operation fails because the communication peer 184 /// has closed the connection and there is no more data in the 185 /// receive buffer of the instance. 186 /// EFI_CONNECTION_RESET: The receiving or transmission operation fails 187 /// because this connection is reset either by instance 188 /// itself or the communication peer. 189 /// EFI_ABORTED: The receiving or transmission is aborted. 190 /// EFI_TIMEOUT: The transmission timer expires and no more 191 /// specific information is available. 192 /// EFI_NETWORK_UNREACHABLE: The transmission fails 193 /// because an ICMP network unreachable error is received. 194 /// EFI_HOST_UNREACHABLE: The transmission fails because an 195 /// ICMP host unreachable error is received. 196 /// EFI_PROTOCOL_UNREACHABLE: The transmission fails 197 /// because an ICMP protocol unreachable error is received. 198 /// EFI_PORT_UNREACHABLE: The transmission fails and an 199 /// ICMP port unreachable error is received. 200 /// EFI_ICMP_ERROR: The transmission fails and some other 201 /// ICMP error is received. 202 /// EFI_DEVICE_ERROR: An unexpected system or network error occurs. 203 /// EFI_NO_MEDIA: There was a media error. 204 /// 205 EFI_TCP4_COMPLETION_TOKEN CompletionToken; 206 union { 207 /// 208 /// When this token is used for receiving, RxData is a pointer to EFI_TCP4_RECEIVE_DATA. 209 /// 210 EFI_TCP4_RECEIVE_DATA *RxData; 211 /// 212 /// When this token is used for transmitting, TxData is a pointer to EFI_TCP4_TRANSMIT_DATA. 213 /// 214 EFI_TCP4_TRANSMIT_DATA *TxData; 215 } Packet; 216 } EFI_TCP4_IO_TOKEN; 217 218 typedef struct { 219 EFI_TCP4_COMPLETION_TOKEN CompletionToken; 220 BOOLEAN AbortOnClose; 221 } EFI_TCP4_CLOSE_TOKEN; 222 223 // 224 // Interface definition for TCP4 protocol 225 // 226 227 /** 228 Get the current operational status. 229 230 @param This The pointer to the EFI_TCP4_PROTOCOL instance. 231 @param Tcp4State The pointer to the buffer to receive the current TCP state. 232 @param Tcp4ConfigData The pointer to the buffer to receive the current TCP configuration. 233 @param Ip4ModeData The pointer to the buffer to receive the current IPv4 configuration 234 data used by the TCPv4 instance. 235 @param MnpConfigData The pointer to the buffer to receive the current MNP configuration 236 data used indirectly by the TCPv4 instance. 237 @param SnpModeData The pointer to the buffer to receive the current SNP configuration 238 data used indirectly by the TCPv4 instance. 239 240 @retval EFI_SUCCESS The mode data was read. 241 @retval EFI_INVALID_PARAMETER This is NULL. 242 @retval EFI_NOT_STARTED No configuration data is available because this instance hasn't 243 been started. 244 245 **/ 246 typedef 247 EFI_STATUS 248 (EFIAPI *EFI_TCP4_GET_MODE_DATA)( 249 IN EFI_TCP4_PROTOCOL *This, 250 OUT EFI_TCP4_CONNECTION_STATE *Tcp4State OPTIONAL, 251 OUT EFI_TCP4_CONFIG_DATA *Tcp4ConfigData OPTIONAL, 252 OUT EFI_IP4_MODE_DATA *Ip4ModeData OPTIONAL, 253 OUT EFI_MANAGED_NETWORK_CONFIG_DATA *MnpConfigData OPTIONAL, 254 OUT EFI_SIMPLE_NETWORK_MODE *SnpModeData OPTIONAL 255 ); 256 257 /** 258 Initialize or brutally reset the operational parameters for this EFI TCPv4 instance. 259 260 @param This The pointer to the EFI_TCP4_PROTOCOL instance. 261 @param Tcp4ConfigData The pointer to the configure data to configure the instance. 262 263 @retval EFI_SUCCESS The operational settings are set, changed, or reset 264 successfully. 265 @retval EFI_INVALID_PARAMETER Some parameter is invalid. 266 @retval EFI_NO_MAPPING When using a default address, configuration (through 267 DHCP, BOOTP, RARP, etc.) is not finished yet. 268 @retval EFI_ACCESS_DENIED Configuring TCP instance when it is configured without 269 calling Configure() with NULL to reset it. 270 @retval EFI_DEVICE_ERROR An unexpected network or system error occurred. 271 @retval EFI_UNSUPPORTED One or more of the control options are not supported in 272 the implementation. 273 @retval EFI_OUT_OF_RESOURCES Could not allocate enough system resources when 274 executing Configure(). 275 276 **/ 277 typedef 278 EFI_STATUS 279 (EFIAPI *EFI_TCP4_CONFIGURE)( 280 IN EFI_TCP4_PROTOCOL *This, 281 IN EFI_TCP4_CONFIG_DATA *TcpConfigData OPTIONAL 282 ); 283 284 /** 285 Add or delete a route entry to the route table 286 287 @param This The pointer to the EFI_TCP4_PROTOCOL instance. 288 @param DeleteRoute Set it to TRUE to delete this route from the routing table. Set it to 289 FALSE to add this route to the routing table. 290 DestinationAddress and SubnetMask are used as the 291 keywords to search route entry. 292 @param SubnetAddress The destination network. 293 @param SubnetMask The subnet mask of the destination network. 294 @param GatewayAddress The gateway address for this route. It must be on the same 295 subnet with the station address unless a direct route is specified. 296 297 @retval EFI_SUCCESS The operation completed successfully. 298 @retval EFI_NOT_STARTED The EFI TCPv4 Protocol instance has not been configured. 299 @retval EFI_NO_MAPPING When using a default address, configuration (DHCP, BOOTP, 300 RARP, etc.) is not finished yet. 301 @retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE: 302 - This is NULL. 303 - SubnetAddress is NULL. 304 - SubnetMask is NULL. 305 - GatewayAddress is NULL. 306 - *SubnetAddress is not NULL a valid subnet address. 307 - *SubnetMask is not a valid subnet mask. 308 - *GatewayAddress is not a valid unicast IP address or it 309 is not in the same subnet. 310 @retval EFI_OUT_OF_RESOURCES Could not allocate enough resources to add the entry to the 311 routing table. 312 @retval EFI_NOT_FOUND This route is not in the routing table. 313 @retval EFI_ACCESS_DENIED The route is already defined in the routing table. 314 @retval EFI_UNSUPPORTED The TCP driver does not support this operation. 315 316 **/ 317 typedef 318 EFI_STATUS 319 (EFIAPI *EFI_TCP4_ROUTES)( 320 IN EFI_TCP4_PROTOCOL *This, 321 IN BOOLEAN DeleteRoute, 322 IN EFI_IPv4_ADDRESS *SubnetAddress, 323 IN EFI_IPv4_ADDRESS *SubnetMask, 324 IN EFI_IPv4_ADDRESS *GatewayAddress 325 ); 326 327 /** 328 Initiate a nonblocking TCP connection request for an active TCP instance. 329 330 @param This The pointer to the EFI_TCP4_PROTOCOL instance. 331 @param ConnectionToken The pointer to the connection token to return when the TCP three 332 way handshake finishes. 333 334 @retval EFI_SUCCESS The connection request is successfully initiated and the state 335 of this TCPv4 instance has been changed to Tcp4StateSynSent. 336 @retval EFI_NOT_STARTED This EFI TCPv4 Protocol instance has not been configured. 337 @retval EFI_ACCESS_DENIED One or more of the following conditions are TRUE: 338 - This instance is not configured as an active one. 339 - This instance is not in Tcp4StateClosed state. 340 @retval EFI_INVALID_PARAMETER One or more of the following are TRUE: 341 - This is NULL. 342 - ConnectionToken is NULL. 343 - ConnectionToken->CompletionToken.Event is NULL. 344 @retval EFI_OUT_OF_RESOURCES The driver can't allocate enough resource to initiate the activ eopen. 345 @retval EFI_DEVICE_ERROR An unexpected system or network error occurred. 346 347 **/ 348 typedef 349 EFI_STATUS 350 (EFIAPI *EFI_TCP4_CONNECT)( 351 IN EFI_TCP4_PROTOCOL *This, 352 IN EFI_TCP4_CONNECTION_TOKEN *ConnectionToken 353 ); 354 355 /** 356 Listen on the passive instance to accept an incoming connection request. This is a nonblocking operation. 357 358 @param This The pointer to the EFI_TCP4_PROTOCOL instance. 359 @param ListenToken The pointer to the listen token to return when operation finishes. 360 361 @retval EFI_SUCCESS The listen token has been queued successfully. 362 @retval EFI_NOT_STARTED This EFI TCPv4 Protocol instance has not been configured. 363 @retval EFI_ACCESS_DENIED One or more of the following are TRUE: 364 - This instance is not a passive instance. 365 - This instance is not in Tcp4StateListen state. 366 - The same listen token has already existed in the listen 367 token queue of this TCP instance. 368 @retval EFI_INVALID_PARAMETER One or more of the following are TRUE: 369 - This is NULL. 370 - ListenToken is NULL. 371 - ListentToken->CompletionToken.Event is NULL. 372 @retval EFI_OUT_OF_RESOURCES Could not allocate enough resource to finish the operation. 373 @retval EFI_DEVICE_ERROR Any unexpected and not belonged to above category error. 374 375 **/ 376 typedef 377 EFI_STATUS 378 (EFIAPI *EFI_TCP4_ACCEPT)( 379 IN EFI_TCP4_PROTOCOL *This, 380 IN EFI_TCP4_LISTEN_TOKEN *ListenToken 381 ); 382 383 /** 384 Queues outgoing data into the transmit queue. 385 386 @param This The pointer to the EFI_TCP4_PROTOCOL instance. 387 @param Token The pointer to the completion token to queue to the transmit queue. 388 389 @retval EFI_SUCCESS The data has been queued for transmission. 390 @retval EFI_NOT_STARTED This EFI TCPv4 Protocol instance has not been configured. 391 @retval EFI_NO_MAPPING When using a default address, configuration (DHCP, BOOTP, 392 RARP, etc.) is not finished yet. 393 @retval EFI_INVALID_PARAMETER One or more of the following are TRUE: 394 - This is NULL. 395 - Token is NULL. 396 - Token->CompletionToken.Event is NULL. 397 - Token->Packet.TxData is NULL L. 398 - Token->Packet.FragmentCount is zero. 399 - Token->Packet.DataLength is not equal to the sum of fragment lengths. 400 @retval EFI_ACCESS_DENIED One or more of the following conditions is TRUE: 401 - A transmit completion token with the same Token->CompletionToken.Event 402 was already in the transmission queue. 403 - The current instance is in Tcp4StateClosed state. 404 - The current instance is a passive one and it is in 405 Tcp4StateListen state. 406 - User has called Close() to disconnect this connection. 407 @retval EFI_NOT_READY The completion token could not be queued because the 408 transmit queue is full. 409 @retval EFI_OUT_OF_RESOURCES Could not queue the transmit data because of resource 410 shortage. 411 @retval EFI_NETWORK_UNREACHABLE There is no route to the destination network or address. 412 413 **/ 414 typedef 415 EFI_STATUS 416 (EFIAPI *EFI_TCP4_TRANSMIT)( 417 IN EFI_TCP4_PROTOCOL *This, 418 IN EFI_TCP4_IO_TOKEN *Token 419 ); 420 421 /** 422 Places an asynchronous receive request into the receiving queue. 423 424 @param This The pointer to the EFI_TCP4_PROTOCOL instance. 425 @param Token The pointer to a token that is associated with the receive data 426 descriptor. 427 428 @retval EFI_SUCCESS The receive completion token was cached. 429 @retval EFI_NOT_STARTED This EFI TCPv4 Protocol instance has not been configured. 430 @retval EFI_NO_MAPPING When using a default address, configuration (DHCP, BOOTP, RARP, 431 etc.) is not finished yet. 432 @retval EFI_INVALID_PARAMETER One or more of the following conditions is TRUE: 433 - This is NULL. 434 - Token is NULL. 435 - Token->CompletionToken.Event is NULL. 436 - Token->Packet.RxData is NULL. 437 - Token->Packet.RxData->DataLength is 0. 438 - The Token->Packet.RxData->DataLength is not 439 the sum of all FragmentBuffer length in FragmentTable. 440 @retval EFI_OUT_OF_RESOURCES The receive completion token could not be queued due to a lack of 441 system resources (usually memory). 442 @retval EFI_DEVICE_ERROR An unexpected system or network error occurred. 443 @retval EFI_ACCESS_DENIED One or more of the following conditions is TRUE: 444 - A receive completion token with the same Token- 445 >CompletionToken.Event was already in the receive 446 queue. 447 - The current instance is in Tcp4StateClosed state. 448 - The current instance is a passive one and it is in 449 Tcp4StateListen state. 450 - User has called Close() to disconnect this connection. 451 @retval EFI_CONNECTION_FIN The communication peer has closed the connection and there is 452 no any buffered data in the receive buffer of this instance. 453 @retval EFI_NOT_READY The receive request could not be queued because the receive queue is full. 454 455 **/ 456 typedef 457 EFI_STATUS 458 (EFIAPI *EFI_TCP4_RECEIVE)( 459 IN EFI_TCP4_PROTOCOL *This, 460 IN EFI_TCP4_IO_TOKEN *Token 461 ); 462 463 /** 464 Disconnecting a TCP connection gracefully or reset a TCP connection. This function is a 465 nonblocking operation. 466 467 @param This The pointer to the EFI_TCP4_PROTOCOL instance. 468 @param CloseToken The pointer to the close token to return when operation finishes. 469 470 @retval EFI_SUCCESS The Close() is called successfully. 471 @retval EFI_NOT_STARTED This EFI TCPv4 Protocol instance has not been configured. 472 @retval EFI_ACCESS_DENIED One or more of the following are TRUE: 473 - Configure() has been called with 474 TcpConfigData set to NULL and this function has 475 not returned. 476 - Previous Close() call on this instance has not 477 finished. 478 @retval EFI_INVALID_PARAMETER One or more of the following are TRUE: 479 - This is NULL. 480 - CloseToken is NULL. 481 - CloseToken->CompletionToken.Event is NULL. 482 @retval EFI_OUT_OF_RESOURCES Could not allocate enough resource to finish the operation. 483 @retval EFI_DEVICE_ERROR Any unexpected and not belonged to above category error. 484 485 **/ 486 typedef 487 EFI_STATUS 488 (EFIAPI *EFI_TCP4_CLOSE)( 489 IN EFI_TCP4_PROTOCOL *This, 490 IN EFI_TCP4_CLOSE_TOKEN *CloseToken 491 ); 492 493 /** 494 Abort an asynchronous connection, listen, transmission or receive request. 495 496 @param This The pointer to the EFI_TCP4_PROTOCOL instance. 497 @param Token The pointer to a token that has been issued by 498 EFI_TCP4_PROTOCOL.Connect(), 499 EFI_TCP4_PROTOCOL.Accept(), 500 EFI_TCP4_PROTOCOL.Transmit() or 501 EFI_TCP4_PROTOCOL.Receive(). If NULL, all pending 502 tokens issued by above four functions will be aborted. Type 503 EFI_TCP4_COMPLETION_TOKEN is defined in 504 EFI_TCP4_PROTOCOL.Connect(). 505 506 @retval EFI_SUCCESS The asynchronous I/O request is aborted and Token->Event 507 is signaled. 508 @retval EFI_INVALID_PARAMETER This is NULL. 509 @retval EFI_NOT_STARTED This instance hasn't been configured. 510 @retval EFI_NO_MAPPING When using the default address, configuration 511 (DHCP, BOOTP,RARP, etc.) hasn't finished yet. 512 @retval EFI_NOT_FOUND The asynchronous I/O request isn't found in the 513 transmission or receive queue. It has either 514 completed or wasn't issued by Transmit() and Receive(). 515 @retval EFI_UNSUPPORTED The implementation does not support this function. 516 517 **/ 518 typedef 519 EFI_STATUS 520 (EFIAPI *EFI_TCP4_CANCEL)( 521 IN EFI_TCP4_PROTOCOL *This, 522 IN EFI_TCP4_COMPLETION_TOKEN *Token OPTIONAL 523 ); 524 525 /** 526 Poll to receive incoming data and transmit outgoing segments. 527 528 @param This The pointer to the EFI_TCP4_PROTOCOL instance. 529 530 @retval EFI_SUCCESS Incoming or outgoing data was processed. 531 @retval EFI_INVALID_PARAMETER This is NULL. 532 @retval EFI_DEVICE_ERROR An unexpected system or network error occurred. 533 @retval EFI_NOT_READY No incoming or outgoing data is processed. 534 @retval EFI_TIMEOUT Data was dropped out of the transmission or receive queue. 535 Consider increasing the polling rate. 536 537 **/ 538 typedef 539 EFI_STATUS 540 (EFIAPI *EFI_TCP4_POLL)( 541 IN EFI_TCP4_PROTOCOL *This 542 ); 543 544 /// 545 /// The EFI_TCP4_PROTOCOL defines the EFI TCPv4 Protocol child to be used by 546 /// any network drivers or applications to send or receive data stream. 547 /// It can either listen on a specified port as a service or actively connected 548 /// to remote peer as a client. Each instance has its own independent settings, 549 /// such as the routing table. 550 /// 551 struct _EFI_TCP4_PROTOCOL { 552 EFI_TCP4_GET_MODE_DATA GetModeData; 553 EFI_TCP4_CONFIGURE Configure; 554 EFI_TCP4_ROUTES Routes; 555 EFI_TCP4_CONNECT Connect; 556 EFI_TCP4_ACCEPT Accept; 557 EFI_TCP4_TRANSMIT Transmit; 558 EFI_TCP4_RECEIVE Receive; 559 EFI_TCP4_CLOSE Close; 560 EFI_TCP4_CANCEL Cancel; 561 EFI_TCP4_POLL Poll; 562 }; 563 564 extern EFI_GUID gEfiTcp4ServiceBindingProtocolGuid; 565 extern EFI_GUID gEfiTcp4ProtocolGuid; 566 567 #endif 568