diff options
Diffstat (limited to 'Src/IP/MostMsg.cpp')
| -rw-r--r-- | Src/IP/MostMsg.cpp | 405 |
1 files changed, 405 insertions, 0 deletions
diff --git a/Src/IP/MostMsg.cpp b/Src/IP/MostMsg.cpp new file mode 100644 index 0000000..3ca043f --- /dev/null +++ b/Src/IP/MostMsg.cpp @@ -0,0 +1,405 @@ +/* + * Video On Demand Samples + * + * Copyright (C) 2015 Microchip Technology Germany II GmbH & Co. KG + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + * You may also obtain this software under a propriety license from Microchip. + * Please contact Microchip for further information. + * + */ + +#include "Console.h" +#include "MostMsg.h" +#include <stdlib.h> + +static uint32_t crc32_tab[] = +{ + 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, + 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, + 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2, + 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, + 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, + 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, + 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c, + 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, + 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, + 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, + 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106, + 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, + 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, + 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, + 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, + 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, + 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, + 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, + 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, + 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, + 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, + 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, + 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84, + 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, + 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, + 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, + 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e, + 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, + 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, + 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, + 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28, + 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, + 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, + 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, + 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242, + 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, + 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, + 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, + 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, + 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, + 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, + 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, + 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d +}; + +static uint32_t CalcCRC32( const uint8_t *p, uint32_t size ) +{ + uint32_t crc = ~0U; + + while( size-- ) + crc = crc32_tab[( crc ^ *p++ ) & 0xFF] ^ ( crc >> 8 ); + + return crc ^ ~0U; +} + + +CMostMsg::CMostMsg() : m_nIsValid( false ), m_nRefCount( 1 ), m_nFBlock( 0 ), m_nFunc( 0 ), m_nInst( 0 ), + m_nOpType( 0 ), m_nPayloadLen( 0 ), m_Payload( NULL ), m_nParsePos( 0 ), + m_nHeaderCrc( 0 ), m_nPayloadCrc( 0 ) +{ +} + +CMostMsg::CMostMsg( uint32_t nFBlock, uint32_t nInst, uint32_t nFunc, uint8_t nOpType, uint32_t nPayloadLen, + const uint8_t *Payload ) : m_nIsValid( true ), m_nRefCount( 1 ), m_Payload( NULL ), + m_nParsePos( 0xFFFFFFFF ), m_nHeaderCrc( 0 ), m_nPayloadCrc( 0 ) +{ + m_nFBlock = nFBlock; + m_nInst = nInst; + m_nFunc = nFunc; + m_nOpType = nOpType; + m_nPayloadLen = nPayloadLen; + if( nPayloadLen > 0 ) + { + m_Payload = ( uint8_t * )malloc( m_nPayloadLen ); + if( NULL == m_Payload ) + { + ConsolePrintf( + PRIO_ERROR, RED"CMostMsg Constructor failed to allocated %d bytes of memory"RESETCOLOR"\n", m_nPayloadLen ); + m_nIsValid = false; + m_nPayloadLen = 0; + return; + } + memcpy( m_Payload, Payload, nPayloadLen ); + } +} + +CMostMsg::~CMostMsg() +{ + m_nIsValid = false; + m_nPayloadLen = 0; + if( NULL != m_Payload ) + { + free( m_Payload ); + m_Payload = NULL; + } +} + +void CMostMsg::AddReference() +{ + ++m_nRefCount; +} + +void CMostMsg::RemoveReference() +{ + if( 0 == --m_nRefCount ) + delete this; +} + +uint32_t CMostMsg::ToByteArray( uint8_t **ppBuffer ) +{ + if( NULL == ppBuffer ) + { + ConsolePrintf( + PRIO_ERROR, RED"CMostMsg::ToByteArray ppBuffer is NULL < %d"RESETCOLOR"\n" ); + return 0; + } + uint32_t serializedLen = 20; + if( 0 != m_nPayloadLen ) + serializedLen += m_nPayloadLen + 4; //If there is payload, it will be CRC checked + uint8_t *b = ( uint8_t * )malloc( serializedLen ); + if( NULL == b ) + { + ConsolePrintf( + PRIO_ERROR, RED"CMostMsg::ToByteArray failed to allocate %d bytes"RESETCOLOR"\n", ( m_nPayloadLen + 24 ) ); + *ppBuffer = NULL; + return 0; + } + *ppBuffer = b; + b[0] = ( uint8_t )0x49; + b[1] = ( uint8_t )0x72; + b[2] = ( uint8_t )0x16; + b[3] = ( uint8_t )0x25; + b[4] = ( uint8_t )( m_nFBlock & 0xFF ); + b[5] = ( uint8_t )( m_nInst & 0xFF ); + b[6] = ( uint8_t )( ( m_nFunc >> 8 ) & 0xFF ); + b[7] = ( uint8_t )( ( m_nFunc )&0xFF ); + b[8] = ( uint8_t )( m_nOpType ); + b[9] = ( uint8_t )0x0; + b[10] = ( uint8_t )0x0; + b[11] = ( uint8_t )0x0; + b[12] = ( uint8_t )( ( m_nPayloadLen >> 24 ) & 0xFF ); + b[13] = ( uint8_t )( ( m_nPayloadLen >> 16 ) & 0xFF ); + b[14] = ( uint8_t )( ( m_nPayloadLen >> 8 ) & 0xFF ); + b[15] = ( uint8_t )( m_nPayloadLen & 0xFF ); + + uint32_t headerCrc = CalcCRC32( b, 16 ); + + b[16] = ( uint8_t )( ( headerCrc >> 24 ) & 0xFF ); + b[17] = ( uint8_t )( ( headerCrc >> 16 ) & 0xFF ); + b[18] = ( uint8_t )( ( headerCrc >> 8 ) & 0xFF ); + b[19] = ( uint8_t )( headerCrc & 0xFF ); + + if( 0 != m_nPayloadLen ) + { + for( uint32_t i = 0; i < m_nPayloadLen; i++ ) + b[20 + i] = m_Payload[i]; + + uint32_t payloadCrc = CalcCRC32( &b[20], m_nPayloadLen ); + + b[20 + m_nPayloadLen] = ( uint8_t )( ( payloadCrc >> 24 ) & 0xFF ); + b[21 + m_nPayloadLen] = ( uint8_t )( ( payloadCrc >> 16 ) & 0xFF ); + b[22 + m_nPayloadLen] = ( uint8_t )( ( payloadCrc >> 8 ) & 0xFF ); + b[23 + m_nPayloadLen] = ( uint8_t )( payloadCrc & 0xFF ); + } + return serializedLen; +} + +bool CMostMsg::Parse( uint8_t receivedByte ) +{ + if( 0xFFFFFFFF == m_nParsePos ) + { + ConsolePrintf( + PRIO_ERROR, RED"CMostMsg::Parse was called, but the parse state is invalid"RESETCOLOR"\n" ); + return false; + } + bool valid = true; + if( m_nParsePos <= 19 ) + { + if( m_nParsePos <= 15 ) + m_zHeader[m_nParsePos] = receivedByte; + + //Check Header + switch( m_nParsePos ) + { + case 0: + if( 0x49 != receivedByte ) + valid = false; + break; + case 1: + if( 0x72 != receivedByte ) + valid = false; + break; + case 2: + if( 0x16 != receivedByte ) + valid = false; + break; + case 3: + if( 0x25 != receivedByte ) + valid = false; + break; + case 4: + m_nFBlock = receivedByte; + break; + case 5: + m_nInst = receivedByte; + break; + case 6: + m_nFunc = receivedByte << 8; + break; + case 7: + m_nFunc += receivedByte; + break; + case 8: + m_nOpType = receivedByte; + break; + case 9: + case 10: + case 11: + //Reserved for future use cases + break; + case 12: + m_nPayloadLen = receivedByte << 24; + break; + case 13: + m_nPayloadLen += receivedByte << 16; + break; + case 14: + m_nPayloadLen += receivedByte << 8; + break; + case 15: + m_nPayloadLen += receivedByte; + break; + case 16: + m_nHeaderCrc = receivedByte << 24; + break; + case 17: + m_nHeaderCrc += receivedByte << 16; + break; + case 18: + m_nHeaderCrc += receivedByte << 8; + break; + case 19: + m_nHeaderCrc += receivedByte; + if( m_nHeaderCrc == CalcCRC32( m_zHeader, 16 ) ) + { + if( 0 != m_nPayloadLen ) + { + //Continue to parse the payload + m_Payload = ( uint8_t * )malloc( m_nPayloadLen ); + if( NULL == m_Payload ) + { + ConsolePrintf( + PRIO_ERROR, RED"MostMsg::Protocol deserializing error, could not allocate %d bytes of memory"RESETCOLOR + "\n", m_nPayloadLen ); + valid = false; + m_nPayloadLen = 0; + } + } + else + { + //No payload, we are finished + m_nIsValid = true; + m_nParsePos = 0xFFFFFFFF - 1; + } + } + else + { + ConsolePrintf( + PRIO_ERROR, RED"MostMsg::Protocol error, header CRC does not match"RESETCOLOR"\n" ); + valid = false; + } + break; + } + } + else + { + if( m_nParsePos < ( m_nPayloadLen + 20 ) ) + { + //Check Payload and store it + if( NULL != m_Payload ) + { + m_Payload[m_nParsePos - 20] = receivedByte; + } + else + { + ConsolePrintf( + PRIO_ERROR, RED"MostMsg::Protocol deserializing error, payload buffer is NULL"RESETCOLOR"\n" ); + valid = false; + m_nPayloadLen = 0; + } + } + else + { + //Finally check CRC of payload + uint32_t crcState = m_nParsePos - m_nPayloadLen - 20; + switch( crcState ) + { + case 0: + m_nPayloadCrc = receivedByte << 24; + break; + case 1: + m_nPayloadCrc += receivedByte << 16; + break; + case 2: + m_nPayloadCrc += receivedByte << 8; + break; + case 3: + m_nPayloadCrc += receivedByte; + if( m_nPayloadCrc == CalcCRC32( m_Payload, m_nPayloadLen ) ) + { + //Payload is successfully received + m_nIsValid = true; + m_nParsePos = 0xFFFFFFFF - 1; + } + else + { + ConsolePrintf( + PRIO_ERROR, RED"MostMsg::Protocol deserializing error, Payload CRC mismatch"RESETCOLOR"\n" ); + valid = false; + } + break; + default: + ConsolePrintf( + PRIO_ERROR, RED"MostMsg::Protocol deserializing error, Payload CRC state is out of range"RESETCOLOR"\n" ); + valid = false; + } + } + } + + if( valid ) + { + ++m_nParsePos; + } + else + { + ConsolePrintf( + PRIO_ERROR, RED"CMostMsg::Parse failed at parse position %d"RESETCOLOR"\n", m_nParsePos ); + m_nParsePos = 0xFFFFFFFF; + } + return valid; +} + +bool CMostMsg::IsValid() +{ + return m_nIsValid; +} + +uint32_t CMostMsg::GetFBlock() +{ + return m_nFBlock; +} + +uint32_t CMostMsg::GetFunc() +{ + return m_nFunc; +} + +uint32_t CMostMsg::GetInst() +{ + return m_nInst; +} + +uint8_t CMostMsg::GetOpType() +{ + return m_nOpType; +} + +uint8_t *CMostMsg::GetPayload() +{ + return m_Payload; +} + +uint32_t CMostMsg::GetPayloadLen() +{ + return m_nPayloadLen; +} |