/* rejects packets that arrive with OPCODE != QUERY, or QDCOUNT != 1 */
void query_only(evldns_server_request *srq, void *user_data, ldns_rdf *qname, ldns_rr_type qtype, ldns_rr_class qclass)
{
ldns_pkt *req = srq->request;
if (ldns_pkt_get_opcode(req) != LDNS_PACKET_QUERY) {
srq->response = evldns_response(req, LDNS_RCODE_NOTIMPL);
}
if (ldns_pkt_qdcount(req) != 1) {
srq->response = evldns_response(req, LDNS_RCODE_FORMERR);
}
}
void query_check(evldns_server_request *srq,
ATTR_UNUSED(void *user_data),
ATTR_UNUSED(ldns_rdf *qname),
ldns_rr_type qtype,
ldns_rr_class qclass)
{
ldns_pkt *req = srq->request;
/* only QUERY is supported */
if (ldns_pkt_get_opcode(req) != LDNS_PACKET_QUERY) {
srq->response = evldns_response(req, LDNS_RCODE_NOTIMPL);
return;
}
/* QDCOUNT == 1, NB: QR == 1 now handled upstream */
if (ldns_pkt_qdcount(req) != 1) {
srq->response = evldns_response(req, LDNS_RCODE_FORMERR);
return;
}
/* Unexpected QCLASS */
if (qclass != LDNS_RR_CLASS_IN) {
srq->response = evldns_response(req, LDNS_RCODE_NOTIMPL);
return;
}
/* Unexpected QTYPE */
if (qtype == LDNS_RR_TYPE_AXFR || qtype == LDNS_RR_TYPE_IXFR) {
srq->response = evldns_response(req, LDNS_RCODE_NOTIMPL);
return;
}
/* Not going to handle QTYPE == ANY either */
if (qtype == LDNS_RR_TYPE_ANY) {
srq->response = evldns_response(req, LDNS_RCODE_NOTIMPL);
return;
}
}
