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69 lines
3.7 KiB
C
69 lines
3.7 KiB
C
/*
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* FreeRTOS+TCP V2.3.2
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* Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* http://aws.amazon.com/freertos
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* http://www.FreeRTOS.org
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*/
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#ifndef FREERTOS_TCP_IP_H
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#define FREERTOS_TCP_IP_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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BaseType_t xProcessReceivedTCPPacket( NetworkBufferDescriptor_t * pxDescriptor );
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typedef enum eTCP_STATE
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{
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/* Comments about the TCP states are borrowed from the very useful
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* Wiki page:
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* http://en.wikipedia.org/wiki/Transmission_Control_Protocol */
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eCLOSED = 0U, /* 0 (server + client) no connection state at all. */
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eTCP_LISTEN, /* 1 (server) waiting for a connection request
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* from any remote TCP and port. */
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eCONNECT_SYN, /* 2 (client) internal state: socket wants to send
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* a connect */
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eSYN_FIRST, /* 3 (server) Just created, must ACK the SYN request. */
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eSYN_RECEIVED, /* 4 (server) waiting for a confirming connection request
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* acknowledgement after having both received and sent a connection request. */
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eESTABLISHED, /* 5 (server + client) an open connection, data received can be
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* delivered to the user. The normal state for the data transfer phase of the connection. */
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eFIN_WAIT_1, /* 6 (server + client) waiting for a connection termination request from the remote TCP,
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* or an acknowledgement of the connection termination request previously sent. */
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eFIN_WAIT_2, /* 7 (server + client) waiting for a connection termination request from the remote TCP. */
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eCLOSE_WAIT, /* 8 (server + client) waiting for a connection termination request from the local user. */
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eCLOSING, /* 9 (server + client) waiting for a connection termination request acknowledgement from the remote TCP. */
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eLAST_ACK, /*10 (server + client) waiting for an acknowledgement of the connection termination request
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* previously sent to the remote TCP
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* (which includes an acknowledgement of its connection termination request). */
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eTIME_WAIT, /*11 (either server or client) waiting for enough time to pass to be sure the remote TCP received the
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* acknowledgement of its connection termination request. [According to RFC 793 a connection can
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* stay in TIME-WAIT for a maximum of four minutes known as a MSL (maximum segment lifetime).] */
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} eIPTCPState_t;
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* FREERTOS_TCP_IP_H */
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