MSG_AUTHORITATIVE_HEADER_LEN Macro

#define MSG_AUTHORITATIVE_HEADER_LEN(x) ( x=(2+2 \
                                     +1+1+snmpEngnIDLength \
                                     +1+1+4 \
                                     +1+1+4 \
                                     +1+1+securityPrimitivesOfIncomingPdu.securityNameLength \
                                     +1+1+snmpOutMsgAuthParamLen \
                                     +1+1+snmpOutMsgPrivParamLen) \
                                )

Length of SNMPv3 authoratative msg header length = Header length ( 2 + 2 bytes) + engineID ( snmpEngnIDLength bytes)

• engine boot( 4 bytes)+ engine time(4 bytes)

+security name (securityPrimitivesOfIncomingPdu value) +authentication parameters (snmpOutMsgAuthParamLen value) +privacy parameters (snmpOutMsgAuthParamLen value)