/* | |
* FreeRTOS+TCP V2.0.0 | |
* 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. If you wish to use our Amazon | |
* FreeRTOS name, please do so in a fair use way that does not cause confusion. | |
* | |
* 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://www.FreeRTOS.org | |
* http://aws.amazon.com/freertos | |
* | |
* 1 tab == 4 spaces! | |
*/ | |
#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 */ | |