snmp_pdu_validate
void snmp_pdu_validate(struct ber_element *, enum snmp_request, int32_t,
snmp_pdu_validate(v2cmps(message, community), REQUEST_RESPONSE,
snmp_pdu_validate(pdu, REQUEST_REPORT, 0, 0, 0, &vb, 1);
snmp_pdu_validate(pdu, REQUEST_RESPONSE, requestid, error, index,