/* | |
* FreeRTOS+TCP Labs Build 160919 (C) 2016 Real Time Engineers ltd. | |
* Authors include Hein Tibosch and Richard Barry | |
* | |
******************************************************************************* | |
***** NOTE ******* NOTE ******* NOTE ******* NOTE ******* NOTE ******* NOTE *** | |
*** *** | |
*** *** | |
*** FREERTOS+TCP IS STILL IN THE LAB (mainly because the FTP and HTTP *** | |
*** demos have a dependency on FreeRTOS+FAT, which is only in the Labs *** | |
*** download): *** | |
*** *** | |
*** FreeRTOS+TCP is functional and has been used in commercial products *** | |
*** for some time. Be aware however that we are still refining its *** | |
*** design, the source code does not yet quite conform to the strict *** | |
*** coding and style standards mandated by Real Time Engineers ltd., and *** | |
*** the documentation and testing is not necessarily complete. *** | |
*** *** | |
*** PLEASE REPORT EXPERIENCES USING THE SUPPORT RESOURCES FOUND ON THE *** | |
*** URL: http://www.FreeRTOS.org/contact Active early adopters may, at *** | |
*** the sole discretion of Real Time Engineers Ltd., be offered versions *** | |
*** under a license other than that described below. *** | |
*** *** | |
*** *** | |
***** NOTE ******* NOTE ******* NOTE ******* NOTE ******* NOTE ******* NOTE *** | |
******************************************************************************* | |
* | |
* FreeRTOS+TCP can be used under two different free open source licenses. The | |
* license that applies is dependent on the processor on which FreeRTOS+TCP is | |
* executed, as follows: | |
* | |
* If FreeRTOS+TCP is executed on one of the processors listed under the Special | |
* License Arrangements heading of the FreeRTOS+TCP license information web | |
* page, then it can be used under the terms of the FreeRTOS Open Source | |
* License. If FreeRTOS+TCP is used on any other processor, then it can be used | |
* under the terms of the GNU General Public License V2. Links to the relevant | |
* licenses follow: | |
* | |
* The FreeRTOS+TCP License Information Page: http://www.FreeRTOS.org/tcp_license | |
* The FreeRTOS Open Source License: http://www.FreeRTOS.org/license | |
* The GNU General Public License Version 2: http://www.FreeRTOS.org/gpl-2.0.txt | |
* | |
* FreeRTOS+TCP is distributed in the hope that it will be useful. You cannot | |
* use FreeRTOS+TCP unless you agree that you use the software 'as is'. | |
* FreeRTOS+TCP is provided WITHOUT ANY WARRANTY; without even the implied | |
* warranties of NON-INFRINGEMENT, MERCHANTABILITY or FITNESS FOR A PARTICULAR | |
* PURPOSE. Real Time Engineers Ltd. disclaims all conditions and terms, be they | |
* implied, expressed, or statutory. | |
* | |
* 1 tab == 4 spaces! | |
* | |
* http://www.FreeRTOS.org | |
* http://www.FreeRTOS.org/plus | |
* http://www.FreeRTOS.org/labs | |
* | |
*/ | |
#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 */ | |