Ghost User · aac04d04
--- a/src/libknot/rrset.c
+++ b/src/libknot/rrset.c
                        const uint8_t *rdata, const uint16_t size,
                        const uint32_t ttl, mm_ctx_t *mm)
 {
-	if (rrset == NULL || rdata == NULL) {
+	if (rrset == NULL || (rdata == NULL && size > 0)) {
--- a/src/libknot/edns.c
+++ b/src/libknot/edns.c
+	uint8_t *new_data = (uint8_t *)mm_alloc(mm, new_data_len);
+	CHECK_ALLOC_LOG(new_data, KNOT_ENOMEM);
+
+	dbg_edns_verb("EDNS: Adding option. Code: %u, length: %u, data:\n",
+	              code, length);
+	dbg_edns_hex_verb((char *)data, length);
+
+	memcpy(new_data, old_data, old_data_len);
+	// write length and code in wireformat (convert endian)
+	knot_wire_write_u16(new_data + old_data_len, code);
+	knot_wire_write_u16(new_data + old_data_len + 2, length);
+	// write the option data
+	memcpy(new_data + old_data_len + 4, data, length);
+
+	/* 2) Create new RDATA structure (we need to preserve the TTL).
+	 */
--- a/src/libknot/edns.c
+++ b/src/libknot/edns.c
-	}
+	return knot_edns_has_option(opt_rr, KNOT_EDNS_OPTION_NSID);
 }

 /*----------------------------------------------------------------------------*/

-void knot_edns_free(knot_opt_rr_t **opt_rr)
+bool knot_edns_check_record(knot_rrset_t *opt_rr)
 {
-	if (opt_rr == NULL || *opt_rr == NULL) {
-		return;
+	knot_rdata_t *rdata = knot_rdataset_at(&opt_rr->rrs, 0);
+	if (rdata == NULL) {
+		return false;
 	}