mirror of
https://github.com/FreeRTOS/FreeRTOS-Plus-TCP
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89269454b9
* 556 Initial Cmake Module definition. #557 * renaming variables that have conflicting names with MSC and *nix headers * fix build issue for posix port * Fix warning: -Waddress-of-packed-member when calculating checksum directly from network packets * fix warnings with prvInitialiseTCPFields declaration * removing macros that hides the structure fields * Updating build check enable all config to enable all config macros * CMake: Fix GIT_REPOSITORY and GIT_TAG (#742) * moving ipTRUE_BOOL and ipFALSE_BOOL out of #ifndef pdTRUE_SIGNED check as they are not defined in kernel * minor fix to the cmake files and main file * Uncrustify: triggered by comment. * adding doxygen comments to new functions * Uncrustify: triggered by comment * Add more warnings check and fix warnings * Uncrustify: triggered by comment * fix review feedback and more debug printf warnings fix * more warnings fix * fix misra issues * Uncrustify: triggered by comment * replace sin_addr with sin_address.ulIP_IPv4 in +TCP demos * replace sin_addr6 with sin_address.xIP_IPv6 in +TCP demos * replace freertos_sockaddr6 with freertos_sockaddr in +TCP demos * review feedback changes * removing duplicate def for prvStreamBufferAdd from winpcap * fix more warnings from MSVC * Uncrustify: triggered by comment * review feedback changes * Uncrustify: triggered by comment --------- Co-authored-by: phelter <paulheltera@gmail.com> Co-authored-by: Nikhil Kamath <110539926+amazonKamath@users.noreply.github.com> Co-authored-by: GitHub Action <action@github.com>
105 lines
3.8 KiB
C
105 lines
3.8 KiB
C
/*
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* FreeRTOS+TCP <DEVELOPMENT BRANCH>
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* Copyright (C) 2022 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_IPV6.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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/**
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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_IPV6( FreeRTOS_Socket_t * pxSocket )
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{
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uint32_t ulMSS = ipconfigTCP_MSS;
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#if ( ipconfigHAS_DEBUG_PRINTF == 1 )
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char cIPv6Address[ 40 ];
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#endif
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const NetworkEndPoint_t * pxEndPoint = pxSocket->pxEndPoint;
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if( pxEndPoint != NULL )
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{
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/* Compared to IPv4, an IPv6 header is 20 bytes longer.
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* It must be subtracted from the MSS. */
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size_t uxDifference = ipSIZE_OF_IPv6_HEADER - ipSIZE_OF_IPv4_HEADER;
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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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ulMSS -= uxDifference;
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IPv6_Type_t eType = xIPv6_GetIPType( &( pxSocket->u.xTCP.xRemoteIP.xIP_IPv6 ) );
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if( eType == eIPv6_Global )
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{
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/* The packet will travel through Internet, make the MSS
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* smaller. */
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ulMSS = FreeRTOS_min_uint32( ( uint32_t ) tcpREDUCED_MSS_THROUGH_INTERNET, ulMSS );
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}
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}
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#if ( ipconfigHAS_DEBUG_PRINTF == 1 )
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{
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( void ) FreeRTOS_inet_ntop( FREERTOS_AF_INET6, ( const void * ) pxSocket->u.xTCP.xRemoteIP.xIP_IPv6.ucBytes, cIPv6Address, sizeof( cIPv6Address ) );
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FreeRTOS_debug_printf( ( "prvSocketSetMSS: %u bytes for %s ip port %u\n", ( unsigned ) ulMSS, cIPv6Address, pxSocket->u.xTCP.usRemotePort ) );
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}
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#endif
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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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