mirror of
https://github.com/FreeRTOS/FreeRTOS-Plus-TCP
synced 2025-10-21 06:40:08 +08:00
a4124602cc
This commit brings in the refactoring and restructuring changes from IntegrationTesting1 branch to the main branch. It also includes additional unit tests for 100% coverage. The rationale behind not creating a PR is that the conflicts were too huge to be resolved correctly. Thus, a force push to the main branch is being done.
119 lines
4.9 KiB
C
119 lines
4.9 KiB
C
/*
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* FreeRTOS+TCP V2.3.4
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* Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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*
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* SPDX-License-Identifier: MIT
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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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/**
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* @file FreeRTOS_TCP_Utils.c
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* @brief Module contains utility functions used by FreeRTOS+TCP module.
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*
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* Endianness: in this module all ports and IP addresses are stored in
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* host byte-order, except fields in the IP-packets
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*/
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/* Standard includes. */
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#include <stdint.h>
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#include <stdio.h>
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/* FreeRTOS includes. */
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#include "FreeRTOS.h"
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/* FreeRTOS+TCP includes. */
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#include "FreeRTOS_IP.h"
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#include "FreeRTOS_IP_Private.h"
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#include "FreeRTOS_TCP_Utils.h"
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/* Just make sure the contents doesn't get compiled if TCP is not enabled. */
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#if ipconfigUSE_TCP == 1
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/* For logging and debugging: make a string showing the TCP flags
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*/
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#if ( ipconfigHAS_DEBUG_PRINTF != 0 )
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/**
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* @brief Print out the value of flags in a human readable manner.
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*
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* @param[in] xFlags: The TCP flags.
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*
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* @return The string containing the flags.
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*/
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static char retString[ 10 ];
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const char * prvTCPFlagMeaning( UBaseType_t xFlags )
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{
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size_t uxFlags = ( size_t ) xFlags;
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( void ) snprintf( retString,
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sizeof( retString ), "%c%c%c%c%c%c%c%c",
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( ( uxFlags & ( size_t ) tcpTCP_FLAG_FIN ) != 0 ) ? 'F' : '.', /* 0x0001: No more data from sender */
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( ( uxFlags & ( size_t ) tcpTCP_FLAG_SYN ) != 0 ) ? 'S' : '.', /* 0x0002: Synchronize sequence numbers */
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( ( uxFlags & ( size_t ) tcpTCP_FLAG_RST ) != 0 ) ? 'R' : '.', /* 0x0004: Reset the connection */
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( ( uxFlags & ( size_t ) tcpTCP_FLAG_PSH ) != 0 ) ? 'P' : '.', /* 0x0008: Push function: please push buffered data to the recv application */
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( ( uxFlags & ( size_t ) tcpTCP_FLAG_ACK ) != 0 ) ? 'A' : '.', /* 0x0010: Acknowledgment field is significant */
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( ( uxFlags & ( size_t ) tcpTCP_FLAG_URG ) != 0 ) ? 'U' : '.', /* 0x0020: Urgent pointer field is significant */
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( ( uxFlags & ( size_t ) tcpTCP_FLAG_ECN ) != 0 ) ? 'E' : '.', /* 0x0040: ECN-Echo */
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( ( uxFlags & ( size_t ) tcpTCP_FLAG_CWR ) != 0 ) ? 'C' : '.' ); /* 0x0080: Congestion Window Reduced */
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return retString;
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}
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/*-----------------------------------------------------------*/
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#endif /* ipconfigHAS_DEBUG_PRINTF */
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/**
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* @brief Set the MSS (Maximum segment size) associated with the given socket.
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*
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* @param[in] pxSocket: The socket whose MSS is to be set.
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*/
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void prvSocketSetMSS( FreeRTOS_Socket_t * pxSocket )
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{
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uint32_t ulMSS;
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/* Do not allow MSS smaller than tcpMINIMUM_SEGMENT_LENGTH. */
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#if ( ipconfigTCP_MSS >= tcpMINIMUM_SEGMENT_LENGTH )
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{
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ulMSS = ipconfigTCP_MSS;
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}
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#else
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{
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ulMSS = tcpMINIMUM_SEGMENT_LENGTH;
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}
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#endif
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if( ( ( FreeRTOS_ntohl( pxSocket->u.xTCP.ulRemoteIP ) ^ *ipLOCAL_IP_ADDRESS_POINTER ) & xNetworkAddressing.ulNetMask ) != 0U )
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{
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/* Data for this peer will pass through a router, and maybe through
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* the internet. Limit the MSS to 1400 bytes or less. */
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ulMSS = FreeRTOS_min_uint32( ( uint32_t ) tcpREDUCED_MSS_THROUGH_INTERNET, ulMSS );
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}
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FreeRTOS_debug_printf( ( "prvSocketSetMSS: %u bytes for %xip:%u\n", ( unsigned ) ulMSS, ( unsigned ) pxSocket->u.xTCP.ulRemoteIP, pxSocket->u.xTCP.usRemotePort ) );
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pxSocket->u.xTCP.usMSS = ( uint16_t ) ulMSS;
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}
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/*-----------------------------------------------------------*/
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#endif /* ipconfigUSE_TCP == 1 */
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