| /* |
| * FreeRTOS+TCP V2.2.0 |
| * 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. |
| * |
| * 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 */ |
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