+/*
+ * Values for EDNS option types
+ */
+#define E_LLQ 1 /* long lived queries protocol */
+#define E_UL 2 /* dynamic dns update leases */
+#define E_NSID 3 /* name server identifier */
+#define E_DAU 5 /* signal DNSSEC algorithm understood */
+#define E_DHU 6 /* signal DS hash understood */
+#define E_N3U 7 /* signal NSEC3 hash understood */
+#define E_ECS 8 /* EDNS client subnet */
+#define E_EXPIRE 9 /* zone expiration */
+#define E_COOKIE 10 /* DNS cookies */
+#define E_KEEPALIVE 11 /* TCP keepalive */
+#define E_PADDING 12 /* pad DNS messages */
+#define E_CHAIN 13 /* chain DNS queries */
+#define E_KEYTAG 14 /* EDNS key tag */
+#define E_CLIENTTAG 16 /* EDNS client tag */
+#define E_SERVERTAG 17 /* EDNS server tag */
+
+/*
+ * Values for DNSSEC Algorithms
+ * https://www.iana.org/assignments/dns-sec-alg-numbers/dns-sec-alg-numbers.xhtml
+ */
+
+#define A_DELETE 0
+#define A_RSAMD5 1
+#define A_DH 2
+#define A_DSA 3
+#define A_RSASHA1 5
+#define A_DSA_NSEC3_SHA1 6
+#define A_RSASHA1_NSEC3_SHA1 7
+#define A_RSASHA256 8
+#define A_RSASHA512 10
+#define A_ECC_GOST 12
+#define A_ECDSAP256SHA256 13
+#define A_ECDSAP384SHA384 14
+#define A_ED25519 15
+#define A_ED448 16
+#define A_INDIRECT 252
+#define A_PRIVATEDNS 253
+#define A_PRIVATEOID 254
+
+/*
+ * Values for NSEC3 algorithms
+ * https://www.iana.org/assignments/dnssec-nsec3-parameters/dnssec-nsec3-parameters.xhtml
+ */
+#define NSEC_SHA1 1
+
+/*
+ * Values for delegation signer algorithms
+ * https://www.iana.org/assignments/ds-rr-types/ds-rr-types.xhtml
+ */
+#define DS_SHA1 1
+#define DS_SHA256 2
+#define DS_GOST 3
+#define DS_SHA384 4
+
+