ProcessHeader Function

static SNMP_ACTION ProcessHeader(
    PDU_INFO* pduDbPtr, 
    char* community, 
    BYTE* len
);

Collects PDU_INFO (SNMP pdu information database),community name, community length and length of data payload. This function validates the received udp packet for these different variables of snmp pdu. The sequence in which these elements are received is important. The validation is done for the agent processing capabilities and the max UDP packet length as UDP packets can not be fragmented.

UDPIsGetReady(SNMPAgentSocket) is called in SNMPTask(), it check if there is any packet on SNMP Agent socket, should return TRUE.

The received pdu will be processed only if this routine returns the pdu type else the pdu is discarded as not Snmp pdu.