|
|
#include <..\header\TC_handler.h>
|
|
|
|
|
|
char TM_checker(ccsdsTelecommandSourcePacketHeader_t * TMPacket)
|
|
|
{
|
|
|
unsigned char pid = 0;
|
|
|
unsigned char category = 0;
|
|
|
unsigned int length = 0;
|
|
|
|
|
|
// APID check *** APID on 2 bytes
|
|
|
pid = ((TMPacket->packetID[0] & 0x07)<<4) + ( (TMPacket->packetID[1]>>4) & 0x0f ); // PID = 11 *** 7 bits xxxxx210 7654xxxx
|
|
|
category = (TMPacket->packetID[1] & 0x0f); // PACKET_CATEGORY = 12 *** 4 bits xxxxxxxx xxxx3210
|
|
|
if (pid!=CCSDS_PROCESS_ID) return CCSDS_ERR_PID;
|
|
|
if (category!=CCSDS_PACKET_CATEGORY) return CCSDS_ERR_CAT;
|
|
|
|
|
|
// packet length check
|
|
|
length = TMPacket->packetLength[1] + TMPacket->packetLength[0] * 256;
|
|
|
if (category<=CCSDS_TELECOMMAND_MAX_PACKET_LENGTH) return CCSDS_ERR_LENGTH; // check that the packet does not exceed the MAX size
|
|
|
|
|
|
// service type, subtype and packet length check
|
|
|
switch(TMPacket->dataFieldHeader[1]) { // service type, authorized values are 181 and 9
|
|
|
case 181:
|
|
|
switch(TMPacket->dataFieldHeader[2]){ //subtype, autorized values are 3, 20, 21, 24, 27, 28, 30, 40, 50, 60, 61
|
|
|
case 3:
|
|
|
if (length!=12) return CCSDS_ERR_LENGTH;
|
|
|
break;
|
|
|
case 20:
|
|
|
if (length!=14) return CCSDS_ERR_LENGTH;
|
|
|
break;
|
|
|
case 21:
|
|
|
if (length!=20) return CCSDS_ERR_LENGTH;
|
|
|
break;
|
|
|
case 24:
|
|
|
if (length!=14) return CCSDS_ERR_LENGTH;
|
|
|
break;
|
|
|
case 27:
|
|
|
if (length!=14) return CCSDS_ERR_LENGTH;
|
|
|
break;
|
|
|
case 28:
|
|
|
if (length!=14) return CCSDS_ERR_LENGTH;
|
|
|
break;
|
|
|
case 30:
|
|
|
if (length!=12) return CCSDS_ERR_LENGTH;
|
|
|
break;
|
|
|
case 40:
|
|
|
if (length!=20) return CCSDS_ERR_LENGTH;
|
|
|
break;
|
|
|
case 50:
|
|
|
if (length!=50) return CCSDS_ERR_LENGTH;
|
|
|
break;
|
|
|
case 60:
|
|
|
if (length!=12) return CCSDS_ERR_LENGTH;
|
|
|
break;
|
|
|
case 61:
|
|
|
if (length!=12) return CCSDS_ERR_LENGTH;
|
|
|
break;
|
|
|
default:
|
|
|
return CCSDS_ERR_SUBTYPE;
|
|
|
break;
|
|
|
}
|
|
|
case 9:
|
|
|
if (TMPacket->dataFieldHeader[2]==129) return CCSDS_ERR_SUBTYPE;
|
|
|
if (length!=18) return CCSDS_ERR_LENGTH;
|
|
|
break;
|
|
|
default:
|
|
|
return CCSDS_ERR_TYPE;
|
|
|
break;
|
|
|
}
|
|
|
|
|
|
// source ID check // Source ID not documented in the ICD
|
|
|
|
|
|
// packet error control, CRC check
|
|
|
|
|
|
return CCSDS_TM_VALID;
|
|
|
}
|
|
|
|
