netxduo
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Outline
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#define NX_SECURE_SOURCE_CODE
#include "nx_secure_tls.h"
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_nx_secure_tls_process_header(NX_SECURE_TLS_SESSION *, NX_PACKET *, ULONG, USHORT *, UINT *, UCHAR *, USHORT *)
Files
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SourceVuSTM32 Libraries and Samplesnetxduonx_secure/src/nx_secure_tls_process_header.c
 
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/**************************************************************************/ /* */ /* Copyright (c) Microsoft Corporation. All rights reserved. */ /* */ /* This software is licensed under the Microsoft Software License */ /* Terms for Microsoft Azure RTOS. Full text of the license can be */ /* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */ /* and in the root directory of this software. */ /* */... /**************************************************************************/ ... /**************************************************************************/ /**************************************************************************/ /** */ /** NetX Secure Component */ /** */ /** Transport Layer Security (TLS) */ /** */... /**************************************************************************/ /**************************************************************************/ #define NX_SECURE_SOURCE_CODE #include "nx_secure_tls.h" ... /**************************************************************************/ /* */ /* FUNCTION RELEASE */ /* */ /* _nx_secure_tls_process_header PORTABLE C */ /* 6.1 */ /* AUTHOR */ /* */ /* Timothy Stapko, Microsoft Corporation */ /* */ /* DESCRIPTION */ /* */ /* This function processes an NX_PACKET data structure, extracting */ /* and parsing a TLS header received from a remote host. */ /* */ /* INPUT */ /* */ /* tls_session Pointer to TLS control block */ /* packet_ptr Pointer to incoming packet */ /* record_offset Offset of current record */ /* message_type Return message type value */ /* length Return message length value */ /* header_data Pointer to header to parse */ /* header_length Length of header data (bytes) */ /* */ /* OUTPUT */ /* */ /* status Completion status */ /* */ /* CALLS */ /* */ /* nx_packet_data_extract_offset Extract data from NX_PACKET */ /* _nx_secure_tls_check_protocol_version Check incoming TLS version */ /* */ /* CALLED BY */ /* */ /* _nx_secure_tls_process_record Process TLS record */ /* */ /* RELEASE HISTORY */ /* */ /* DATE NAME DESCRIPTION */ /* */ /* 05-19-2020 Timothy Stapko Initial Version 6.0 */ /* 09-30-2020 Timothy Stapko Modified comment(s), */ /* supported chained packet, */ /* resulting in version 6.1 */ /* */... /**************************************************************************/ UINT _nx_secure_tls_process_header(NX_SECURE_TLS_SESSION *tls_session, NX_PACKET *packet_ptr, ULONG record_offset, USHORT *message_type, UINT *length, UCHAR *header_data, USHORT *header_length) { ULONG bytes_copied; UINT status; USHORT protocol_version; /* Check the packet. */ if (packet_ptr == NX_NULL) { /* There was an error in extracting the header from the supplied packet. */ return(NX_SECURE_TLS_INVALID_PACKET); }if (packet_ptr == NX_NULL) { ... } /* Process the TLS record header, which will set the state. */ status = nx_packet_data_extract_offset(packet_ptr, record_offset, header_data, NX_SECURE_TLS_RECORD_HEADER_SIZE, &bytes_copied); /* Make sure we actually got a header. */ if (status != NX_SUCCESS) { /* There was an error in extracting the header from the supplied packet. */ return(NX_SECURE_TLS_INVALID_PACKET); }if (status != NX_SUCCESS) { ... } if (bytes_copied != NX_SECURE_TLS_RECORD_HEADER_SIZE) { /* Wait more TCP packets for this one record. */ return(NX_CONTINUE); }if (bytes_copied != NX_SECURE_TLS_RECORD_HEADER_SIZE) { ... } /* Extract message type from packet/record. */ *message_type = header_data[0]; /* Extract the protocol version. */ protocol_version = (USHORT)(((USHORT)header_data[1] << 8) | header_data[2]); /* Get the length of the TLS data. */ *length = (UINT)(((UINT)header_data[3] << 8) + header_data[4]); /* Set header length. */ *header_length = NX_SECURE_TLS_RECORD_HEADER_SIZE; /* Check the protocol version, except when we haven't established a version yet */ if (tls_session -> nx_secure_tls_protocol_version != 0) { /* Check the record's protocol version against the current session. */ status = _nx_secure_tls_check_protocol_version(tls_session, protocol_version, NX_SECURE_TLS); return(status); }if (tls_session -> nx_secure_tls_protocol_version != 0) { ... } return(NX_SUCCESS); }{ ... }
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