text: /*
   * FreeRTOS+TCP V2.0.11
   * Copyright (C) 2017 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy of
   * this software and associated documentation files (the "Software"), to deal in
   * the Software without restriction, including without limitation the rights to
   * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
   * the Software, and to permit persons to whom the Software is furnished to do so,
   * subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in all
   * copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
   * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
   * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
   * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   *
   * http://aws.amazon.com/freertos
   * http://www.FreeRTOS.org
   */
  
  #ifndef FREERTOS_TCP_IP_H
  #define FREERTOS_TCP_IP_H
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  BaseType_t xProcessReceivedTCPPacket( NetworkBufferDescriptor_t *pxNetworkBuffer );
  
  typedef enum eTCP_STATE {
  	/* Comments about the TCP states are borrowed from the very useful
  	 * Wiki page:
  	 * http://en.wikipedia.org/wiki/Transmission_Control_Protocol */
  	eCLOSED = 0u,	/* 0 (server + client) no connection state at all. */
  	eTCP_LISTEN,	/* 1 (server) waiting for a connection request
  						 from any remote TCP and port. */
  	eCONNECT_SYN,	/* 2 (client) internal state: socket wants to send
  						 a connect */
  	eSYN_FIRST,		/* 3 (server) Just created, must ACK the SYN request. */
  	eSYN_RECEIVED,	/* 4 (server) waiting for a confirming connection request
  						 acknowledgement after having both received and sent a connection request. */
  	eESTABLISHED,	/* 5 (server + client) an open connection, data received can be
  						 delivered to the user. The normal state for the data transfer phase of the connection. */
  	eFIN_WAIT_1,	/* 6 (server + client) waiting for a connection termination request from the remote TCP,
  						 or an acknowledgement of the connection termination request previously sent. */
  	eFIN_WAIT_2,	/* 7 (server + client) waiting for a connection termination request from the remote TCP. */
  	eCLOSE_WAIT,	/* 8 (server + client) waiting for a connection termination request from the local user. */
  	eCLOSING,		/*   (server + client) waiting for a connection termination request acknowledgement from the remote TCP. */
  	eLAST_ACK,		/* 9 (server + client) waiting for an acknowledgement of the connection termination request
  						 previously sent to the remote TCP
  						 (which includes an acknowledgement of its connection termination request). */
  	eTIME_WAIT,		/* 10 (either server or client) waiting for enough time to pass to be sure the remote TCP received the
  						 acknowledgement of its connection termination request. [According to RFC 793 a connection can
  						 stay in TIME-WAIT for a maximum of four minutes known as a MSL (maximum segment lifetime).] */
  } eIPTCPState_t;
  
  
  #ifdef __cplusplus
  } // extern "C"
  #endif
  
  #endif /* FREERTOS_TCP_IP_H */
  