diff --git a/lib/dns/rdata/any_255/tsig_250.c b/lib/dns/rdata/any_255/tsig_250.c
index 12f65d515a..21dd02fabf 100644
--- a/lib/dns/rdata/any_255/tsig_250.c
+++ b/lib/dns/rdata/any_255/tsig_250.c
@@ -453,9 +453,7 @@ tostruct_any_tsig(ARGS_TOSTRUCT) {
 	REQUIRE(rdata->length != 0);
 
 	tsig = (dns_rdata_any_tsig_t *)target;
-	tsig->common.rdclass = rdata->rdclass;
-	tsig->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&tsig->common, link);
+	DNS_RDATACOMMON_INIT(tsig, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &sr);
 
diff --git a/lib/dns/rdata/ch_3/a_1.c b/lib/dns/rdata/ch_3/a_1.c
index 791fc884f0..bf6a48d74d 100644
--- a/lib/dns/rdata/ch_3/a_1.c
+++ b/lib/dns/rdata/ch_3/a_1.c
@@ -225,9 +225,7 @@ tostruct_ch_a(ARGS_TOSTRUCT) {
 	REQUIRE(rdata->rdclass == dns_rdataclass_ch);
 	REQUIRE(rdata->length != 0);
 
-	a->common.rdclass = rdata->rdclass;
-	a->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&a->common, link);
+	DNS_RDATACOMMON_INIT(a, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &region);
 
diff --git a/lib/dns/rdata/generic/afsdb_18.c b/lib/dns/rdata/generic/afsdb_18.c
index 0392998abb..a4b84c23a1 100644
--- a/lib/dns/rdata/generic/afsdb_18.c
+++ b/lib/dns/rdata/generic/afsdb_18.c
@@ -207,9 +207,7 @@ tostruct_afsdb(ARGS_TOSTRUCT) {
 	REQUIRE(afsdb != NULL);
 	REQUIRE(rdata->length != 0);
 
-	afsdb->common.rdclass = rdata->rdclass;
-	afsdb->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&afsdb->common, link);
+	DNS_RDATACOMMON_INIT(afsdb, rdata->type, rdata->rdclass);
 
 	dns_name_init(&afsdb->server, NULL);
 
diff --git a/lib/dns/rdata/generic/amtrelay_260.c b/lib/dns/rdata/generic/amtrelay_260.c
index b17c61405e..4d915c7947 100644
--- a/lib/dns/rdata/generic/amtrelay_260.c
+++ b/lib/dns/rdata/generic/amtrelay_260.c
@@ -314,9 +314,7 @@ tostruct_amtrelay(ARGS_TOSTRUCT) {
 	REQUIRE(amtrelay != NULL);
 	REQUIRE(rdata->length >= 2);
 
-	amtrelay->common.rdclass = rdata->rdclass;
-	amtrelay->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&amtrelay->common, link);
+	DNS_RDATACOMMON_INIT(amtrelay, rdata->type, rdata->rdclass);
 
 	dns_name_init(&amtrelay->gateway, NULL);
 	amtrelay->data = NULL;
diff --git a/lib/dns/rdata/generic/avc_258.c b/lib/dns/rdata/generic/avc_258.c
index c32c008144..f19cb480e6 100644
--- a/lib/dns/rdata/generic/avc_258.c
+++ b/lib/dns/rdata/generic/avc_258.c
@@ -75,9 +75,7 @@ tostruct_avc(ARGS_TOSTRUCT) {
 	REQUIRE(rdata->type == dns_rdatatype_avc);
 	REQUIRE(avc != NULL);
 
-	avc->common.rdclass = rdata->rdclass;
-	avc->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&avc->common, link);
+	DNS_RDATACOMMON_INIT(avc, rdata->type, rdata->rdclass);
 
 	return generic_tostruct_txt(CALL_TOSTRUCT);
 }
diff --git a/lib/dns/rdata/generic/caa_257.c b/lib/dns/rdata/generic/caa_257.c
index b3da2c649c..c3e57d25a9 100644
--- a/lib/dns/rdata/generic/caa_257.c
+++ b/lib/dns/rdata/generic/caa_257.c
@@ -499,9 +499,7 @@ tostruct_caa(ARGS_TOSTRUCT) {
 	REQUIRE(rdata->length >= 3U);
 	REQUIRE(rdata->data != NULL);
 
-	caa->common.rdclass = rdata->rdclass;
-	caa->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&caa->common, link);
+	DNS_RDATACOMMON_INIT(caa, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &sr);
 
diff --git a/lib/dns/rdata/generic/cdnskey_60.c b/lib/dns/rdata/generic/cdnskey_60.c
index 6a6e79dfd0..92bb1712ee 100644
--- a/lib/dns/rdata/generic/cdnskey_60.c
+++ b/lib/dns/rdata/generic/cdnskey_60.c
@@ -88,9 +88,7 @@ tostruct_cdnskey(ARGS_TOSTRUCT) {
 	REQUIRE(rdata != NULL);
 	REQUIRE(rdata->type == dns_rdatatype_cdnskey);
 
-	dnskey->common.rdclass = rdata->rdclass;
-	dnskey->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&dnskey->common, link);
+	DNS_RDATACOMMON_INIT(dnskey, rdata->type, rdata->rdclass);
 
 	return generic_tostruct_key(CALL_TOSTRUCT);
 }
diff --git a/lib/dns/rdata/generic/cds_59.c b/lib/dns/rdata/generic/cds_59.c
index b4abb7adc1..d1ededbe4a 100644
--- a/lib/dns/rdata/generic/cds_59.c
+++ b/lib/dns/rdata/generic/cds_59.c
@@ -89,9 +89,7 @@ tostruct_cds(ARGS_TOSTRUCT) {
 	/*
 	 * Checked by generic_tostruct_ds().
 	 */
-	cds->common.rdclass = rdata->rdclass;
-	cds->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&cds->common, link);
+	DNS_RDATACOMMON_INIT(cds, rdata->type, rdata->rdclass);
 
 	return generic_tostruct_ds(CALL_TOSTRUCT);
 }
diff --git a/lib/dns/rdata/generic/cert_37.c b/lib/dns/rdata/generic/cert_37.c
index 80cd7d2ebb..354582d404 100644
--- a/lib/dns/rdata/generic/cert_37.c
+++ b/lib/dns/rdata/generic/cert_37.c
@@ -192,9 +192,7 @@ tostruct_cert(ARGS_TOSTRUCT) {
 	REQUIRE(cert != NULL);
 	REQUIRE(rdata->length != 0);
 
-	cert->common.rdclass = rdata->rdclass;
-	cert->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&cert->common, link);
+	DNS_RDATACOMMON_INIT(cert, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &region);
 
diff --git a/lib/dns/rdata/generic/cname_5.c b/lib/dns/rdata/generic/cname_5.c
index f37ecaaf9a..d8841be5a7 100644
--- a/lib/dns/rdata/generic/cname_5.c
+++ b/lib/dns/rdata/generic/cname_5.c
@@ -147,9 +147,7 @@ tostruct_cname(ARGS_TOSTRUCT) {
 	REQUIRE(cname != NULL);
 	REQUIRE(rdata->length != 0);
 
-	cname->common.rdclass = rdata->rdclass;
-	cname->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&cname->common, link);
+	DNS_RDATACOMMON_INIT(cname, rdata->type, rdata->rdclass);
 
 	dns_name_init(&name, NULL);
 	dns_rdata_toregion(rdata, &region);
diff --git a/lib/dns/rdata/generic/csync_62.c b/lib/dns/rdata/generic/csync_62.c
index 7ac610b420..f77912fe60 100644
--- a/lib/dns/rdata/generic/csync_62.c
+++ b/lib/dns/rdata/generic/csync_62.c
@@ -169,9 +169,7 @@ tostruct_csync(ARGS_TOSTRUCT) {
 	REQUIRE(csync != NULL);
 	REQUIRE(rdata->length != 0);
 
-	csync->common.rdclass = rdata->rdclass;
-	csync->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&csync->common, link);
+	DNS_RDATACOMMON_INIT(csync, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &region);
 
diff --git a/lib/dns/rdata/generic/dlv_32769.c b/lib/dns/rdata/generic/dlv_32769.c
index b932e8af65..8a0e7727e9 100644
--- a/lib/dns/rdata/generic/dlv_32769.c
+++ b/lib/dns/rdata/generic/dlv_32769.c
@@ -85,9 +85,7 @@ tostruct_dlv(ARGS_TOSTRUCT) {
 	REQUIRE(rdata->type == dns_rdatatype_dlv);
 	REQUIRE(dlv != NULL);
 
-	dlv->common.rdclass = rdata->rdclass;
-	dlv->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&dlv->common, link);
+	DNS_RDATACOMMON_INIT(dlv, rdata->type, rdata->rdclass);
 
 	return generic_tostruct_ds(CALL_TOSTRUCT);
 }
diff --git a/lib/dns/rdata/generic/dname_39.c b/lib/dns/rdata/generic/dname_39.c
index f00ec45bf0..ca199f5f31 100644
--- a/lib/dns/rdata/generic/dname_39.c
+++ b/lib/dns/rdata/generic/dname_39.c
@@ -147,9 +147,7 @@ tostruct_dname(ARGS_TOSTRUCT) {
 	REQUIRE(dname != NULL);
 	REQUIRE(rdata->length != 0);
 
-	dname->common.rdclass = rdata->rdclass;
-	dname->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&dname->common, link);
+	DNS_RDATACOMMON_INIT(dname, rdata->type, rdata->rdclass);
 
 	dns_name_init(&name, NULL);
 	dns_rdata_toregion(rdata, &region);
diff --git a/lib/dns/rdata/generic/dnskey_48.c b/lib/dns/rdata/generic/dnskey_48.c
index aff39df4a6..aeb98fc507 100644
--- a/lib/dns/rdata/generic/dnskey_48.c
+++ b/lib/dns/rdata/generic/dnskey_48.c
@@ -89,9 +89,7 @@ tostruct_dnskey(ARGS_TOSTRUCT) {
 	REQUIRE(rdata != NULL);
 	REQUIRE(rdata->type == dns_rdatatype_dnskey);
 
-	dnskey->common.rdclass = rdata->rdclass;
-	dnskey->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&dnskey->common, link);
+	DNS_RDATACOMMON_INIT(dnskey, rdata->type, rdata->rdclass);
 
 	return generic_tostruct_key(CALL_TOSTRUCT);
 }
diff --git a/lib/dns/rdata/generic/doa_259.c b/lib/dns/rdata/generic/doa_259.c
index 03c92769f2..da12d77dca 100644
--- a/lib/dns/rdata/generic/doa_259.c
+++ b/lib/dns/rdata/generic/doa_259.c
@@ -215,9 +215,7 @@ tostruct_doa(ARGS_TOSTRUCT) {
 	REQUIRE(doa != NULL);
 	REQUIRE(rdata->length != 0);
 
-	doa->common.rdclass = rdata->rdclass;
-	doa->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&doa->common, link);
+	DNS_RDATACOMMON_INIT(doa, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &region);
 
diff --git a/lib/dns/rdata/generic/ds_43.c b/lib/dns/rdata/generic/ds_43.c
index 665bd7278d..30aca3ad2b 100644
--- a/lib/dns/rdata/generic/ds_43.c
+++ b/lib/dns/rdata/generic/ds_43.c
@@ -308,9 +308,7 @@ tostruct_ds(ARGS_TOSTRUCT) {
 	REQUIRE(rdata->type == dns_rdatatype_ds);
 	REQUIRE(ds != NULL);
 
-	ds->common.rdclass = rdata->rdclass;
-	ds->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&ds->common, link);
+	DNS_RDATACOMMON_INIT(ds, rdata->type, rdata->rdclass);
 
 	return generic_tostruct_ds(CALL_TOSTRUCT);
 }
diff --git a/lib/dns/rdata/generic/dsync_66.c b/lib/dns/rdata/generic/dsync_66.c
index 52867df1dc..09303befb6 100644
--- a/lib/dns/rdata/generic/dsync_66.c
+++ b/lib/dns/rdata/generic/dsync_66.c
@@ -253,9 +253,7 @@ tostruct_dsync(ARGS_TOSTRUCT) {
 	REQUIRE(dsync != NULL);
 	REQUIRE(rdata->length != 0);
 
-	dsync->common.rdclass = rdata->rdclass;
-	dsync->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&dsync->common, link);
+	DNS_RDATACOMMON_INIT(dsync, rdata->type, rdata->rdclass);
 
 	dns_name_init(&name, NULL);
 	dns_rdata_toregion(rdata, &region);
diff --git a/lib/dns/rdata/generic/eui48_108.c b/lib/dns/rdata/generic/eui48_108.c
index 0550698414..9c1f8c1c6d 100644
--- a/lib/dns/rdata/generic/eui48_108.c
+++ b/lib/dns/rdata/generic/eui48_108.c
@@ -137,9 +137,7 @@ tostruct_eui48(ARGS_TOSTRUCT) {
 
 	UNUSED(mctx);
 
-	eui48->common.rdclass = rdata->rdclass;
-	eui48->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&eui48->common, link);
+	DNS_RDATACOMMON_INIT(eui48, rdata->type, rdata->rdclass);
 
 	memmove(eui48->eui48, rdata->data, rdata->length);
 	return ISC_R_SUCCESS;
diff --git a/lib/dns/rdata/generic/eui64_109.c b/lib/dns/rdata/generic/eui64_109.c
index 12b6ebbbf9..6ad7422288 100644
--- a/lib/dns/rdata/generic/eui64_109.c
+++ b/lib/dns/rdata/generic/eui64_109.c
@@ -140,9 +140,7 @@ tostruct_eui64(ARGS_TOSTRUCT) {
 
 	UNUSED(mctx);
 
-	eui64->common.rdclass = rdata->rdclass;
-	eui64->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&eui64->common, link);
+	DNS_RDATACOMMON_INIT(eui64, rdata->type, rdata->rdclass);
 
 	memmove(eui64->eui64, rdata->data, rdata->length);
 	return ISC_R_SUCCESS;
diff --git a/lib/dns/rdata/generic/gpos_27.c b/lib/dns/rdata/generic/gpos_27.c
index 7f08a640e3..09f15b9320 100644
--- a/lib/dns/rdata/generic/gpos_27.c
+++ b/lib/dns/rdata/generic/gpos_27.c
@@ -133,9 +133,7 @@ tostruct_gpos(ARGS_TOSTRUCT) {
 	REQUIRE(gpos != NULL);
 	REQUIRE(rdata->length != 0);
 
-	gpos->common.rdclass = rdata->rdclass;
-	gpos->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&gpos->common, link);
+	DNS_RDATACOMMON_INIT(gpos, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &region);
 	gpos->long_len = uint8_fromregion(&region);
diff --git a/lib/dns/rdata/generic/hinfo_13.c b/lib/dns/rdata/generic/hinfo_13.c
index b074f6ff38..f6ebb93885 100644
--- a/lib/dns/rdata/generic/hinfo_13.c
+++ b/lib/dns/rdata/generic/hinfo_13.c
@@ -117,9 +117,7 @@ tostruct_hinfo(ARGS_TOSTRUCT) {
 	REQUIRE(hinfo != NULL);
 	REQUIRE(rdata->length != 0);
 
-	hinfo->common.rdclass = rdata->rdclass;
-	hinfo->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&hinfo->common, link);
+	DNS_RDATACOMMON_INIT(hinfo, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &region);
 	hinfo->cpu_len = uint8_fromregion(&region);
diff --git a/lib/dns/rdata/generic/hip_55.c b/lib/dns/rdata/generic/hip_55.c
index 9fee1dc76a..7843957597 100644
--- a/lib/dns/rdata/generic/hip_55.c
+++ b/lib/dns/rdata/generic/hip_55.c
@@ -306,9 +306,7 @@ tostruct_hip(ARGS_TOSTRUCT) {
 	REQUIRE(hip != NULL);
 	REQUIRE(rdata->length != 0);
 
-	hip->common.rdclass = rdata->rdclass;
-	hip->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&hip->common, link);
+	DNS_RDATACOMMON_INIT(hip, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &region);
 
diff --git a/lib/dns/rdata/generic/ipseckey_45.c b/lib/dns/rdata/generic/ipseckey_45.c
index e1aa50329e..bd6442b558 100644
--- a/lib/dns/rdata/generic/ipseckey_45.c
+++ b/lib/dns/rdata/generic/ipseckey_45.c
@@ -357,9 +357,7 @@ tostruct_ipseckey(ARGS_TOSTRUCT) {
 		return ISC_R_NOTIMPLEMENTED;
 	}
 
-	ipseckey->common.rdclass = rdata->rdclass;
-	ipseckey->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&ipseckey->common, link);
+	DNS_RDATACOMMON_INIT(ipseckey, rdata->type, rdata->rdclass);
 
 	dns_name_init(&name, NULL);
 	dns_rdata_toregion(rdata, &region);
diff --git a/lib/dns/rdata/generic/isdn_20.c b/lib/dns/rdata/generic/isdn_20.c
index 4da1fedbc1..11640fc6fe 100644
--- a/lib/dns/rdata/generic/isdn_20.c
+++ b/lib/dns/rdata/generic/isdn_20.c
@@ -138,9 +138,7 @@ tostruct_isdn(ARGS_TOSTRUCT) {
 	REQUIRE(isdn != NULL);
 	REQUIRE(rdata->length != 0);
 
-	isdn->common.rdclass = rdata->rdclass;
-	isdn->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&isdn->common, link);
+	DNS_RDATACOMMON_INIT(isdn, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &r);
 
diff --git a/lib/dns/rdata/generic/key_25.c b/lib/dns/rdata/generic/key_25.c
index 31ea0b7c63..c83ce9f796 100644
--- a/lib/dns/rdata/generic/key_25.c
+++ b/lib/dns/rdata/generic/key_25.c
@@ -395,9 +395,7 @@ tostruct_key(ARGS_TOSTRUCT) {
 	REQUIRE(rdata != NULL);
 	REQUIRE(rdata->type == dns_rdatatype_key);
 
-	key->common.rdclass = rdata->rdclass;
-	key->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&key->common, link);
+	DNS_RDATACOMMON_INIT(key, rdata->type, rdata->rdclass);
 
 	return generic_tostruct_key(CALL_TOSTRUCT);
 }
diff --git a/lib/dns/rdata/generic/keydata_65533.c b/lib/dns/rdata/generic/keydata_65533.c
index e359601544..ec1404557c 100644
--- a/lib/dns/rdata/generic/keydata_65533.c
+++ b/lib/dns/rdata/generic/keydata_65533.c
@@ -333,9 +333,7 @@ tostruct_keydata(ARGS_TOSTRUCT) {
 	REQUIRE(rdata->type == dns_rdatatype_keydata);
 	REQUIRE(keydata != NULL);
 
-	keydata->common.rdclass = rdata->rdclass;
-	keydata->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&keydata->common, link);
+	DNS_RDATACOMMON_INIT(keydata, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &sr);
 
diff --git a/lib/dns/rdata/generic/l32_105.c b/lib/dns/rdata/generic/l32_105.c
index ed61810930..05aaa2910a 100644
--- a/lib/dns/rdata/generic/l32_105.c
+++ b/lib/dns/rdata/generic/l32_105.c
@@ -153,9 +153,7 @@ tostruct_l32(ARGS_TOSTRUCT) {
 
 	UNUSED(mctx);
 
-	l32->common.rdclass = rdata->rdclass;
-	l32->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&l32->common, link);
+	DNS_RDATACOMMON_INIT(l32, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &region);
 	l32->pref = uint16_fromregion(&region);
diff --git a/lib/dns/rdata/generic/l64_106.c b/lib/dns/rdata/generic/l64_106.c
index 62eda4f2bc..6f43eb884a 100644
--- a/lib/dns/rdata/generic/l64_106.c
+++ b/lib/dns/rdata/generic/l64_106.c
@@ -148,9 +148,7 @@ tostruct_l64(ARGS_TOSTRUCT) {
 
 	UNUSED(mctx);
 
-	l64->common.rdclass = rdata->rdclass;
-	l64->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&l64->common, link);
+	DNS_RDATACOMMON_INIT(l64, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &region);
 	l64->pref = uint16_fromregion(&region);
diff --git a/lib/dns/rdata/generic/loc_29.c b/lib/dns/rdata/generic/loc_29.c
index f71d3ec4ab..3f9a4ee2ed 100644
--- a/lib/dns/rdata/generic/loc_29.c
+++ b/lib/dns/rdata/generic/loc_29.c
@@ -753,9 +753,7 @@ tostruct_loc(ARGS_TOSTRUCT) {
 		return ISC_R_NOTIMPLEMENTED;
 	}
 
-	loc->common.rdclass = rdata->rdclass;
-	loc->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&loc->common, link);
+	DNS_RDATACOMMON_INIT(loc, rdata->type, rdata->rdclass);
 
 	loc->v.v0.version = version;
 	isc_region_consume(&r, 1);
diff --git a/lib/dns/rdata/generic/lp_107.c b/lib/dns/rdata/generic/lp_107.c
index c5867cb8aa..5faf8f5424 100644
--- a/lib/dns/rdata/generic/lp_107.c
+++ b/lib/dns/rdata/generic/lp_107.c
@@ -156,9 +156,7 @@ tostruct_lp(ARGS_TOSTRUCT) {
 	REQUIRE(lp != NULL);
 	REQUIRE(rdata->length != 0);
 
-	lp->common.rdclass = rdata->rdclass;
-	lp->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&lp->common, link);
+	DNS_RDATACOMMON_INIT(lp, rdata->type, rdata->rdclass);
 
 	dns_name_init(&name, NULL);
 	dns_rdata_toregion(rdata, &region);
diff --git a/lib/dns/rdata/generic/mb_7.c b/lib/dns/rdata/generic/mb_7.c
index 80a1b651d5..d29140846c 100644
--- a/lib/dns/rdata/generic/mb_7.c
+++ b/lib/dns/rdata/generic/mb_7.c
@@ -146,9 +146,7 @@ tostruct_mb(ARGS_TOSTRUCT) {
 	REQUIRE(mb != NULL);
 	REQUIRE(rdata->length != 0);
 
-	mb->common.rdclass = rdata->rdclass;
-	mb->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&mb->common, link);
+	DNS_RDATACOMMON_INIT(mb, rdata->type, rdata->rdclass);
 
 	dns_name_init(&name, NULL);
 	dns_rdata_toregion(rdata, &region);
diff --git a/lib/dns/rdata/generic/md_3.c b/lib/dns/rdata/generic/md_3.c
index 34dfa98fe8..6d3ecf124d 100644
--- a/lib/dns/rdata/generic/md_3.c
+++ b/lib/dns/rdata/generic/md_3.c
@@ -146,9 +146,7 @@ tostruct_md(ARGS_TOSTRUCT) {
 	REQUIRE(md != NULL);
 	REQUIRE(rdata->length != 0);
 
-	md->common.rdclass = rdata->rdclass;
-	md->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&md->common, link);
+	DNS_RDATACOMMON_INIT(md, rdata->type, rdata->rdclass);
 
 	dns_name_init(&name, NULL);
 	dns_rdata_toregion(rdata, &r);
diff --git a/lib/dns/rdata/generic/mf_4.c b/lib/dns/rdata/generic/mf_4.c
index 2fe0030b30..8015df323e 100644
--- a/lib/dns/rdata/generic/mf_4.c
+++ b/lib/dns/rdata/generic/mf_4.c
@@ -146,9 +146,7 @@ tostruct_mf(ARGS_TOSTRUCT) {
 	REQUIRE(mf != NULL);
 	REQUIRE(rdata->length != 0);
 
-	mf->common.rdclass = rdata->rdclass;
-	mf->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&mf->common, link);
+	DNS_RDATACOMMON_INIT(mf, rdata->type, rdata->rdclass);
 
 	dns_name_init(&name, NULL);
 	dns_rdata_toregion(rdata, &r);
diff --git a/lib/dns/rdata/generic/mg_8.c b/lib/dns/rdata/generic/mg_8.c
index 3119ca2796..9f2a40512d 100644
--- a/lib/dns/rdata/generic/mg_8.c
+++ b/lib/dns/rdata/generic/mg_8.c
@@ -146,9 +146,7 @@ tostruct_mg(ARGS_TOSTRUCT) {
 	REQUIRE(mg != NULL);
 	REQUIRE(rdata->length != 0);
 
-	mg->common.rdclass = rdata->rdclass;
-	mg->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&mg->common, link);
+	DNS_RDATACOMMON_INIT(mg, rdata->type, rdata->rdclass);
 
 	dns_name_init(&name, NULL);
 	dns_rdata_toregion(rdata, &region);
diff --git a/lib/dns/rdata/generic/minfo_14.c b/lib/dns/rdata/generic/minfo_14.c
index a143c6e9f1..09011cbf54 100644
--- a/lib/dns/rdata/generic/minfo_14.c
+++ b/lib/dns/rdata/generic/minfo_14.c
@@ -206,9 +206,7 @@ tostruct_minfo(ARGS_TOSTRUCT) {
 	REQUIRE(minfo != NULL);
 	REQUIRE(rdata->length != 0);
 
-	minfo->common.rdclass = rdata->rdclass;
-	minfo->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&minfo->common, link);
+	DNS_RDATACOMMON_INIT(minfo, rdata->type, rdata->rdclass);
 
 	dns_name_init(&name, NULL);
 	dns_rdata_toregion(rdata, &region);
diff --git a/lib/dns/rdata/generic/mr_9.c b/lib/dns/rdata/generic/mr_9.c
index 620d420ed9..ee8c7162eb 100644
--- a/lib/dns/rdata/generic/mr_9.c
+++ b/lib/dns/rdata/generic/mr_9.c
@@ -146,9 +146,7 @@ tostruct_mr(ARGS_TOSTRUCT) {
 	REQUIRE(mr != NULL);
 	REQUIRE(rdata->length != 0);
 
-	mr->common.rdclass = rdata->rdclass;
-	mr->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&mr->common, link);
+	DNS_RDATACOMMON_INIT(mr, rdata->type, rdata->rdclass);
 
 	dns_name_init(&name, NULL);
 	dns_rdata_toregion(rdata, &region);
diff --git a/lib/dns/rdata/generic/mx_15.c b/lib/dns/rdata/generic/mx_15.c
index 8efde02948..12c44c58ab 100644
--- a/lib/dns/rdata/generic/mx_15.c
+++ b/lib/dns/rdata/generic/mx_15.c
@@ -230,9 +230,7 @@ tostruct_mx(ARGS_TOSTRUCT) {
 	REQUIRE(mx != NULL);
 	REQUIRE(rdata->length != 0);
 
-	mx->common.rdclass = rdata->rdclass;
-	mx->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&mx->common, link);
+	DNS_RDATACOMMON_INIT(mx, rdata->type, rdata->rdclass);
 
 	dns_name_init(&name, NULL);
 	dns_rdata_toregion(rdata, &region);
diff --git a/lib/dns/rdata/generic/naptr_35.c b/lib/dns/rdata/generic/naptr_35.c
index a334fc4ca2..6035711457 100644
--- a/lib/dns/rdata/generic/naptr_35.c
+++ b/lib/dns/rdata/generic/naptr_35.c
@@ -501,9 +501,7 @@ tostruct_naptr(ARGS_TOSTRUCT) {
 	REQUIRE(naptr != NULL);
 	REQUIRE(rdata->length != 0);
 
-	naptr->common.rdclass = rdata->rdclass;
-	naptr->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&naptr->common, link);
+	DNS_RDATACOMMON_INIT(naptr, rdata->type, rdata->rdclass);
 
 	naptr->flags = NULL;
 	naptr->service = NULL;
diff --git a/lib/dns/rdata/generic/nid_104.c b/lib/dns/rdata/generic/nid_104.c
index 832326bec3..0782edf447 100644
--- a/lib/dns/rdata/generic/nid_104.c
+++ b/lib/dns/rdata/generic/nid_104.c
@@ -148,9 +148,7 @@ tostruct_nid(ARGS_TOSTRUCT) {
 
 	UNUSED(mctx);
 
-	nid->common.rdclass = rdata->rdclass;
-	nid->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&nid->common, link);
+	DNS_RDATACOMMON_INIT(nid, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &region);
 	nid->pref = uint16_fromregion(&region);
diff --git a/lib/dns/rdata/generic/ninfo_56.c b/lib/dns/rdata/generic/ninfo_56.c
index 8bed8637d3..100acdcf46 100644
--- a/lib/dns/rdata/generic/ninfo_56.c
+++ b/lib/dns/rdata/generic/ninfo_56.c
@@ -75,9 +75,7 @@ tostruct_ninfo(ARGS_TOSTRUCT) {
 	REQUIRE(rdata->type == dns_rdatatype_ninfo);
 	REQUIRE(ninfo != NULL);
 
-	ninfo->common.rdclass = rdata->rdclass;
-	ninfo->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&ninfo->common, link);
+	DNS_RDATACOMMON_INIT(ninfo, rdata->type, rdata->rdclass);
 
 	return generic_tostruct_txt(CALL_TOSTRUCT);
 }
diff --git a/lib/dns/rdata/generic/ns_2.c b/lib/dns/rdata/generic/ns_2.c
index c3d2d22076..54685f88f3 100644
--- a/lib/dns/rdata/generic/ns_2.c
+++ b/lib/dns/rdata/generic/ns_2.c
@@ -157,9 +157,7 @@ tostruct_ns(ARGS_TOSTRUCT) {
 	REQUIRE(ns != NULL);
 	REQUIRE(rdata->length != 0);
 
-	ns->common.rdclass = rdata->rdclass;
-	ns->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&ns->common, link);
+	DNS_RDATACOMMON_INIT(ns, rdata->type, rdata->rdclass);
 
 	dns_name_init(&name, NULL);
 	dns_rdata_toregion(rdata, &region);
diff --git a/lib/dns/rdata/generic/nsec3_50.c b/lib/dns/rdata/generic/nsec3_50.c
index d7e30503d0..f45fe4dc33 100644
--- a/lib/dns/rdata/generic/nsec3_50.c
+++ b/lib/dns/rdata/generic/nsec3_50.c
@@ -293,9 +293,7 @@ tostruct_nsec3(ARGS_TOSTRUCT) {
 	REQUIRE(nsec3 != NULL);
 	REQUIRE(rdata->length != 0);
 
-	nsec3->common.rdclass = rdata->rdclass;
-	nsec3->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&nsec3->common, link);
+	DNS_RDATACOMMON_INIT(nsec3, rdata->type, rdata->rdclass);
 
 	region.base = rdata->data;
 	region.length = rdata->length;
diff --git a/lib/dns/rdata/generic/nsec3param_51.c b/lib/dns/rdata/generic/nsec3param_51.c
index 7136811fa8..3b66a0f9c0 100644
--- a/lib/dns/rdata/generic/nsec3param_51.c
+++ b/lib/dns/rdata/generic/nsec3param_51.c
@@ -229,9 +229,7 @@ tostruct_nsec3param(ARGS_TOSTRUCT) {
 	REQUIRE(nsec3param != NULL);
 	REQUIRE(rdata->length != 0);
 
-	nsec3param->common.rdclass = rdata->rdclass;
-	nsec3param->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&nsec3param->common, link);
+	DNS_RDATACOMMON_INIT(nsec3param, rdata->type, rdata->rdclass);
 
 	region.base = rdata->data;
 	region.length = rdata->length;
diff --git a/lib/dns/rdata/generic/nsec_47.c b/lib/dns/rdata/generic/nsec_47.c
index 30efa3de4f..c0ab29df19 100644
--- a/lib/dns/rdata/generic/nsec_47.c
+++ b/lib/dns/rdata/generic/nsec_47.c
@@ -165,9 +165,7 @@ tostruct_nsec(ARGS_TOSTRUCT) {
 	REQUIRE(nsec != NULL);
 	REQUIRE(rdata->length != 0);
 
-	nsec->common.rdclass = rdata->rdclass;
-	nsec->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&nsec->common, link);
+	DNS_RDATACOMMON_INIT(nsec, rdata->type, rdata->rdclass);
 
 	dns_name_init(&name, NULL);
 	dns_rdata_toregion(rdata, &region);
diff --git a/lib/dns/rdata/generic/null_10.c b/lib/dns/rdata/generic/null_10.c
index 310e8c2871..77d9bf9b5b 100644
--- a/lib/dns/rdata/generic/null_10.c
+++ b/lib/dns/rdata/generic/null_10.c
@@ -101,9 +101,7 @@ tostruct_null(ARGS_TOSTRUCT) {
 	REQUIRE(rdata->type == dns_rdatatype_null);
 	REQUIRE(null != NULL);
 
-	null->common.rdclass = rdata->rdclass;
-	null->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&null->common, link);
+	DNS_RDATACOMMON_INIT(null, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &r);
 	null->length = r.length;
diff --git a/lib/dns/rdata/generic/nxt_30.c b/lib/dns/rdata/generic/nxt_30.c
index 788243274a..61f3af7947 100644
--- a/lib/dns/rdata/generic/nxt_30.c
+++ b/lib/dns/rdata/generic/nxt_30.c
@@ -244,9 +244,7 @@ tostruct_nxt(ARGS_TOSTRUCT) {
 	REQUIRE(nxt != NULL);
 	REQUIRE(rdata->length != 0);
 
-	nxt->common.rdclass = rdata->rdclass;
-	nxt->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&nxt->common, link);
+	DNS_RDATACOMMON_INIT(nxt, rdata->type, rdata->rdclass);
 
 	dns_name_init(&name, NULL);
 	dns_rdata_toregion(rdata, &region);
diff --git a/lib/dns/rdata/generic/openpgpkey_61.c b/lib/dns/rdata/generic/openpgpkey_61.c
index 208537b97a..8955409460 100644
--- a/lib/dns/rdata/generic/openpgpkey_61.c
+++ b/lib/dns/rdata/generic/openpgpkey_61.c
@@ -145,9 +145,7 @@ tostruct_openpgpkey(ARGS_TOSTRUCT) {
 	REQUIRE(sig != NULL);
 	REQUIRE(rdata->length != 0);
 
-	sig->common.rdclass = rdata->rdclass;
-	sig->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&sig->common, link);
+	DNS_RDATACOMMON_INIT(sig, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &sr);
 
diff --git a/lib/dns/rdata/generic/opt_41.c b/lib/dns/rdata/generic/opt_41.c
index 51ff8d4de5..f3ac152061 100644
--- a/lib/dns/rdata/generic/opt_41.c
+++ b/lib/dns/rdata/generic/opt_41.c
@@ -323,9 +323,7 @@ tostruct_opt(ARGS_TOSTRUCT) {
 	REQUIRE(rdata->type == dns_rdatatype_opt);
 	REQUIRE(opt != NULL);
 
-	opt->common.rdclass = rdata->rdclass;
-	opt->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&opt->common, link);
+	DNS_RDATACOMMON_INIT(opt, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &r);
 	opt->length = r.length;
diff --git a/lib/dns/rdata/generic/ptr_12.c b/lib/dns/rdata/generic/ptr_12.c
index 9544f906e1..26d36b79e9 100644
--- a/lib/dns/rdata/generic/ptr_12.c
+++ b/lib/dns/rdata/generic/ptr_12.c
@@ -159,9 +159,7 @@ tostruct_ptr(ARGS_TOSTRUCT) {
 	REQUIRE(ptr != NULL);
 	REQUIRE(rdata->length != 0);
 
-	ptr->common.rdclass = rdata->rdclass;
-	ptr->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&ptr->common, link);
+	DNS_RDATACOMMON_INIT(ptr, rdata->type, rdata->rdclass);
 
 	dns_name_init(&name, NULL);
 	dns_rdata_toregion(rdata, &region);
diff --git a/lib/dns/rdata/generic/resinfo_261.c b/lib/dns/rdata/generic/resinfo_261.c
index 7c18c40211..a34895c7a9 100644
--- a/lib/dns/rdata/generic/resinfo_261.c
+++ b/lib/dns/rdata/generic/resinfo_261.c
@@ -76,9 +76,7 @@ tostruct_resinfo(ARGS_TOSTRUCT) {
 	REQUIRE(rdata != NULL);
 	REQUIRE(rdata->type == dns_rdatatype_resinfo);
 
-	resinfo->common.rdclass = rdata->rdclass;
-	resinfo->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&resinfo->common, link);
+	DNS_RDATACOMMON_INIT(resinfo, rdata->type, rdata->rdclass);
 
 	return generic_tostruct_txt(CALL_TOSTRUCT);
 }
diff --git a/lib/dns/rdata/generic/rkey_57.c b/lib/dns/rdata/generic/rkey_57.c
index 4ed504fd2a..e2882f68ea 100644
--- a/lib/dns/rdata/generic/rkey_57.c
+++ b/lib/dns/rdata/generic/rkey_57.c
@@ -85,9 +85,7 @@ tostruct_rkey(ARGS_TOSTRUCT) {
 	REQUIRE(rdata != NULL);
 	REQUIRE(rdata->type == dns_rdatatype_rkey);
 
-	rkey->common.rdclass = rdata->rdclass;
-	rkey->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&rkey->common, link);
+	DNS_RDATACOMMON_INIT(rkey, rdata->type, rdata->rdclass);
 
 	return generic_tostruct_key(CALL_TOSTRUCT);
 }
diff --git a/lib/dns/rdata/generic/rp_17.c b/lib/dns/rdata/generic/rp_17.c
index 86de8633fc..eb3c956190 100644
--- a/lib/dns/rdata/generic/rp_17.c
+++ b/lib/dns/rdata/generic/rp_17.c
@@ -205,9 +205,7 @@ tostruct_rp(ARGS_TOSTRUCT) {
 	REQUIRE(rp != NULL);
 	REQUIRE(rdata->length != 0);
 
-	rp->common.rdclass = rdata->rdclass;
-	rp->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&rp->common, link);
+	DNS_RDATACOMMON_INIT(rp, rdata->type, rdata->rdclass);
 
 	dns_name_init(&name, NULL);
 	dns_rdata_toregion(rdata, &region);
diff --git a/lib/dns/rdata/generic/rrsig_46.c b/lib/dns/rdata/generic/rrsig_46.c
index 2fb197b300..10bc039e93 100644
--- a/lib/dns/rdata/generic/rrsig_46.c
+++ b/lib/dns/rdata/generic/rrsig_46.c
@@ -471,9 +471,7 @@ tostruct_rrsig(ARGS_TOSTRUCT) {
 	REQUIRE(sig != NULL);
 	REQUIRE(rdata->length != 0);
 
-	sig->common.rdclass = rdata->rdclass;
-	sig->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&sig->common, link);
+	DNS_RDATACOMMON_INIT(sig, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &sr);
 
diff --git a/lib/dns/rdata/generic/rt_21.c b/lib/dns/rdata/generic/rt_21.c
index 9413e27019..682cd4a57e 100644
--- a/lib/dns/rdata/generic/rt_21.c
+++ b/lib/dns/rdata/generic/rt_21.c
@@ -203,9 +203,7 @@ tostruct_rt(ARGS_TOSTRUCT) {
 	REQUIRE(rt != NULL);
 	REQUIRE(rdata->length != 0);
 
-	rt->common.rdclass = rdata->rdclass;
-	rt->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&rt->common, link);
+	DNS_RDATACOMMON_INIT(rt, rdata->type, rdata->rdclass);
 
 	dns_name_init(&name, NULL);
 	dns_rdata_toregion(rdata, &region);
diff --git a/lib/dns/rdata/generic/sig_24.c b/lib/dns/rdata/generic/sig_24.c
index 31b293c589..a134ade8cd 100644
--- a/lib/dns/rdata/generic/sig_24.c
+++ b/lib/dns/rdata/generic/sig_24.c
@@ -434,9 +434,7 @@ tostruct_sig(ARGS_TOSTRUCT) {
 	REQUIRE(sig != NULL);
 	REQUIRE(rdata->length != 0);
 
-	sig->common.rdclass = rdata->rdclass;
-	sig->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&sig->common, link);
+	DNS_RDATACOMMON_INIT(sig, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &sr);
 
diff --git a/lib/dns/rdata/generic/sink_40.c b/lib/dns/rdata/generic/sink_40.c
index f6e47ae2c8..78076884ce 100644
--- a/lib/dns/rdata/generic/sink_40.c
+++ b/lib/dns/rdata/generic/sink_40.c
@@ -184,9 +184,7 @@ tostruct_sink(ARGS_TOSTRUCT) {
 	REQUIRE(sink != NULL);
 	REQUIRE(rdata->length >= 3);
 
-	sink->common.rdclass = rdata->rdclass;
-	sink->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&sink->common, link);
+	DNS_RDATACOMMON_INIT(sink, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &sr);
 
diff --git a/lib/dns/rdata/generic/smimea_53.c b/lib/dns/rdata/generic/smimea_53.c
index ea947770db..2ddcab81f8 100644
--- a/lib/dns/rdata/generic/smimea_53.c
+++ b/lib/dns/rdata/generic/smimea_53.c
@@ -82,9 +82,7 @@ tostruct_smimea(ARGS_TOSTRUCT) {
 	REQUIRE(rdata->type == dns_rdatatype_smimea);
 	REQUIRE(smimea != NULL);
 
-	smimea->common.rdclass = rdata->rdclass;
-	smimea->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&smimea->common, link);
+	DNS_RDATACOMMON_INIT(smimea, rdata->type, rdata->rdclass);
 
 	return generic_tostruct_tlsa(CALL_TOSTRUCT);
 }
diff --git a/lib/dns/rdata/generic/soa_6.c b/lib/dns/rdata/generic/soa_6.c
index 88ba3caf5d..f02bd63501 100644
--- a/lib/dns/rdata/generic/soa_6.c
+++ b/lib/dns/rdata/generic/soa_6.c
@@ -309,9 +309,7 @@ tostruct_soa(ARGS_TOSTRUCT) {
 	REQUIRE(soa != NULL);
 	REQUIRE(rdata->length != 0);
 
-	soa->common.rdclass = rdata->rdclass;
-	soa->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&soa->common, link);
+	DNS_RDATACOMMON_INIT(soa, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &region);
 
diff --git a/lib/dns/rdata/generic/spf_99.c b/lib/dns/rdata/generic/spf_99.c
index 9347a74624..3991860551 100644
--- a/lib/dns/rdata/generic/spf_99.c
+++ b/lib/dns/rdata/generic/spf_99.c
@@ -76,9 +76,7 @@ tostruct_spf(ARGS_TOSTRUCT) {
 	REQUIRE(rdata != NULL);
 	REQUIRE(rdata->type == dns_rdatatype_spf);
 
-	spf->common.rdclass = rdata->rdclass;
-	spf->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&spf->common, link);
+	DNS_RDATACOMMON_INIT(spf, rdata->type, rdata->rdclass);
 
 	return generic_tostruct_txt(CALL_TOSTRUCT);
 }
diff --git a/lib/dns/rdata/generic/sshfp_44.c b/lib/dns/rdata/generic/sshfp_44.c
index 9104fa5945..5a67ad36dd 100644
--- a/lib/dns/rdata/generic/sshfp_44.c
+++ b/lib/dns/rdata/generic/sshfp_44.c
@@ -205,9 +205,7 @@ tostruct_sshfp(ARGS_TOSTRUCT) {
 	REQUIRE(sshfp != NULL);
 	REQUIRE(rdata->length != 0);
 
-	sshfp->common.rdclass = rdata->rdclass;
-	sshfp->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&sshfp->common, link);
+	DNS_RDATACOMMON_INIT(sshfp, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &region);
 
diff --git a/lib/dns/rdata/generic/ta_32768.c b/lib/dns/rdata/generic/ta_32768.c
index 186190263a..151f6b500c 100644
--- a/lib/dns/rdata/generic/ta_32768.c
+++ b/lib/dns/rdata/generic/ta_32768.c
@@ -85,9 +85,7 @@ tostruct_ta(ARGS_TOSTRUCT) {
 	/*
 	 * Checked by generic_tostruct_ds().
 	 */
-	ds->common.rdclass = rdata->rdclass;
-	ds->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&ds->common, link);
+	DNS_RDATACOMMON_INIT(ds, rdata->type, rdata->rdclass);
 
 	return generic_tostruct_ds(CALL_TOSTRUCT);
 }
diff --git a/lib/dns/rdata/generic/talink_58.c b/lib/dns/rdata/generic/talink_58.c
index d1dbf1220b..dc8e5c03c4 100644
--- a/lib/dns/rdata/generic/talink_58.c
+++ b/lib/dns/rdata/generic/talink_58.c
@@ -169,9 +169,7 @@ tostruct_talink(ARGS_TOSTRUCT) {
 	REQUIRE(talink != NULL);
 	REQUIRE(rdata->length != 0);
 
-	talink->common.rdclass = rdata->rdclass;
-	talink->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&talink->common, link);
+	DNS_RDATACOMMON_INIT(talink, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &region);
 
diff --git a/lib/dns/rdata/generic/tkey_249.c b/lib/dns/rdata/generic/tkey_249.c
index a404023358..45e83daebc 100644
--- a/lib/dns/rdata/generic/tkey_249.c
+++ b/lib/dns/rdata/generic/tkey_249.c
@@ -425,9 +425,7 @@ tostruct_tkey(ARGS_TOSTRUCT) {
 	REQUIRE(tkey != NULL);
 	REQUIRE(rdata->length != 0);
 
-	tkey->common.rdclass = rdata->rdclass;
-	tkey->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&tkey->common, link);
+	DNS_RDATACOMMON_INIT(tkey, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &sr);
 
diff --git a/lib/dns/rdata/generic/tlsa_52.c b/lib/dns/rdata/generic/tlsa_52.c
index aefab8a114..a359f31c55 100644
--- a/lib/dns/rdata/generic/tlsa_52.c
+++ b/lib/dns/rdata/generic/tlsa_52.c
@@ -269,9 +269,7 @@ tostruct_tlsa(ARGS_TOSTRUCT) {
 	REQUIRE(rdata->type == dns_rdatatype_tlsa);
 	REQUIRE(tlsa != NULL);
 
-	tlsa->common.rdclass = rdata->rdclass;
-	tlsa->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&tlsa->common, link);
+	DNS_RDATACOMMON_INIT(tlsa, rdata->type, rdata->rdclass);
 
 	return generic_tostruct_tlsa(CALL_TOSTRUCT);
 }
diff --git a/lib/dns/rdata/generic/txt_16.c b/lib/dns/rdata/generic/txt_16.c
index 093ed26d5b..578a07151b 100644
--- a/lib/dns/rdata/generic/txt_16.c
+++ b/lib/dns/rdata/generic/txt_16.c
@@ -212,9 +212,7 @@ tostruct_txt(ARGS_TOSTRUCT) {
 	REQUIRE(rdata->type == dns_rdatatype_txt);
 	REQUIRE(txt != NULL);
 
-	txt->common.rdclass = rdata->rdclass;
-	txt->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&txt->common, link);
+	DNS_RDATACOMMON_INIT(txt, rdata->type, rdata->rdclass);
 
 	return generic_tostruct_txt(CALL_TOSTRUCT);
 }
diff --git a/lib/dns/rdata/generic/uri_256.c b/lib/dns/rdata/generic/uri_256.c
index 2f423b341f..7a7dafa8ec 100644
--- a/lib/dns/rdata/generic/uri_256.c
+++ b/lib/dns/rdata/generic/uri_256.c
@@ -211,9 +211,7 @@ tostruct_uri(ARGS_TOSTRUCT) {
 	REQUIRE(uri != NULL);
 	REQUIRE(rdata->length != 0);
 
-	uri->common.rdclass = rdata->rdclass;
-	uri->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&uri->common, link);
+	DNS_RDATACOMMON_INIT(uri, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &sr);
 
diff --git a/lib/dns/rdata/generic/wallet_262.c b/lib/dns/rdata/generic/wallet_262.c
index 106003cc13..0cab8ee3b1 100644
--- a/lib/dns/rdata/generic/wallet_262.c
+++ b/lib/dns/rdata/generic/wallet_262.c
@@ -75,9 +75,7 @@ tostruct_wallet(ARGS_TOSTRUCT) {
 	REQUIRE(rdata->type == dns_rdatatype_wallet);
 	REQUIRE(wallet != NULL);
 
-	wallet->common.rdclass = rdata->rdclass;
-	wallet->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&wallet->common, link);
+	DNS_RDATACOMMON_INIT(wallet, rdata->type, rdata->rdclass);
 
 	return generic_tostruct_txt(CALL_TOSTRUCT);
 }
diff --git a/lib/dns/rdata/generic/x25_19.c b/lib/dns/rdata/generic/x25_19.c
index 11e618c569..7718bb26f9 100644
--- a/lib/dns/rdata/generic/x25_19.c
+++ b/lib/dns/rdata/generic/x25_19.c
@@ -146,9 +146,7 @@ tostruct_x25(ARGS_TOSTRUCT) {
 	REQUIRE(x25 != NULL);
 	REQUIRE(rdata->length != 0);
 
-	x25->common.rdclass = rdata->rdclass;
-	x25->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&x25->common, link);
+	DNS_RDATACOMMON_INIT(x25, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &r);
 	x25->x25_len = uint8_fromregion(&r);
diff --git a/lib/dns/rdata/generic/zonemd_63.c b/lib/dns/rdata/generic/zonemd_63.c
index 007c0ac6f3..e0b53ba738 100644
--- a/lib/dns/rdata/generic/zonemd_63.c
+++ b/lib/dns/rdata/generic/zonemd_63.c
@@ -257,9 +257,7 @@ tostruct_zonemd(ARGS_TOSTRUCT) {
 	REQUIRE(zonemd != NULL);
 	REQUIRE(rdata->length != 0);
 
-	zonemd->common.rdclass = rdata->rdclass;
-	zonemd->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&zonemd->common, link);
+	DNS_RDATACOMMON_INIT(zonemd, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &region);
 
diff --git a/lib/dns/rdata/hs_4/a_1.c b/lib/dns/rdata/hs_4/a_1.c
index d142c7337b..52b826b2bd 100644
--- a/lib/dns/rdata/hs_4/a_1.c
+++ b/lib/dns/rdata/hs_4/a_1.c
@@ -159,9 +159,7 @@ tostruct_hs_a(ARGS_TOSTRUCT) {
 
 	UNUSED(mctx);
 
-	a->common.rdclass = rdata->rdclass;
-	a->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&a->common, link);
+	DNS_RDATACOMMON_INIT(a, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &region);
 	n = uint32_fromregion(&region);
diff --git a/lib/dns/rdata/in_1/a6_38.c b/lib/dns/rdata/in_1/a6_38.c
index 540a21899f..db18ee0164 100644
--- a/lib/dns/rdata/in_1/a6_38.c
+++ b/lib/dns/rdata/in_1/a6_38.c
@@ -346,9 +346,7 @@ tostruct_in_a6(ARGS_TOSTRUCT) {
 	REQUIRE(a6 != NULL);
 	REQUIRE(rdata->length != 0);
 
-	a6->common.rdclass = rdata->rdclass;
-	a6->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&a6->common, link);
+	DNS_RDATACOMMON_INIT(a6, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &r);
 
diff --git a/lib/dns/rdata/in_1/a_1.c b/lib/dns/rdata/in_1/a_1.c
index 6f7cf0967b..ade8a8af6a 100644
--- a/lib/dns/rdata/in_1/a_1.c
+++ b/lib/dns/rdata/in_1/a_1.c
@@ -160,9 +160,7 @@ tostruct_in_a(ARGS_TOSTRUCT) {
 
 	UNUSED(mctx);
 
-	a->common.rdclass = rdata->rdclass;
-	a->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&a->common, link);
+	DNS_RDATACOMMON_INIT(a, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &region);
 	n = uint32_fromregion(&region);
diff --git a/lib/dns/rdata/in_1/aaaa_28.c b/lib/dns/rdata/in_1/aaaa_28.c
index bad864915d..b1a947882c 100644
--- a/lib/dns/rdata/in_1/aaaa_28.c
+++ b/lib/dns/rdata/in_1/aaaa_28.c
@@ -172,9 +172,7 @@ tostruct_in_aaaa(ARGS_TOSTRUCT) {
 
 	UNUSED(mctx);
 
-	aaaa->common.rdclass = rdata->rdclass;
-	aaaa->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&aaaa->common, link);
+	DNS_RDATACOMMON_INIT(aaaa, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &r);
 	INSIST(r.length == 16);
diff --git a/lib/dns/rdata/in_1/apl_42.c b/lib/dns/rdata/in_1/apl_42.c
index c24eee4b85..9e9dd1826c 100644
--- a/lib/dns/rdata/in_1/apl_42.c
+++ b/lib/dns/rdata/in_1/apl_42.c
@@ -288,9 +288,7 @@ tostruct_in_apl(ARGS_TOSTRUCT) {
 	REQUIRE(rdata->type == dns_rdatatype_apl);
 	REQUIRE(rdata->rdclass == dns_rdataclass_in);
 
-	apl->common.rdclass = rdata->rdclass;
-	apl->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&apl->common, link);
+	DNS_RDATACOMMON_INIT(apl, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &r);
 	apl->apl_len = r.length;
diff --git a/lib/dns/rdata/in_1/atma_34.c b/lib/dns/rdata/in_1/atma_34.c
index a0a37c7c94..b7d35a1f0f 100644
--- a/lib/dns/rdata/in_1/atma_34.c
+++ b/lib/dns/rdata/in_1/atma_34.c
@@ -225,9 +225,7 @@ tostruct_in_atma(ARGS_TOSTRUCT) {
 	REQUIRE(atma != NULL);
 	REQUIRE(rdata->length != 0);
 
-	atma->common.rdclass = rdata->rdclass;
-	atma->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&atma->common, link);
+	DNS_RDATACOMMON_INIT(atma, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &r);
 	atma->format = r.base[0];
diff --git a/lib/dns/rdata/in_1/dhcid_49.c b/lib/dns/rdata/in_1/dhcid_49.c
index 90376542f3..e653aca742 100644
--- a/lib/dns/rdata/in_1/dhcid_49.c
+++ b/lib/dns/rdata/in_1/dhcid_49.c
@@ -145,9 +145,7 @@ tostruct_in_dhcid(ARGS_TOSTRUCT) {
 	REQUIRE(dhcid != NULL);
 	REQUIRE(rdata->length != 0);
 
-	dhcid->common.rdclass = rdata->rdclass;
-	dhcid->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&dhcid->common, link);
+	DNS_RDATACOMMON_INIT(dhcid, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &region);
 
diff --git a/lib/dns/rdata/in_1/eid_31.c b/lib/dns/rdata/in_1/eid_31.c
index 2bdccb8763..2728120d2f 100644
--- a/lib/dns/rdata/in_1/eid_31.c
+++ b/lib/dns/rdata/in_1/eid_31.c
@@ -134,9 +134,7 @@ tostruct_in_eid(ARGS_TOSTRUCT) {
 	REQUIRE(eid != NULL);
 	REQUIRE(rdata->length != 0);
 
-	eid->common.rdclass = rdata->rdclass;
-	eid->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&eid->common, link);
+	DNS_RDATACOMMON_INIT(eid, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &r);
 	eid->eid_len = r.length;
diff --git a/lib/dns/rdata/in_1/kx_36.c b/lib/dns/rdata/in_1/kx_36.c
index 8e29e53894..3c93d5e343 100644
--- a/lib/dns/rdata/in_1/kx_36.c
+++ b/lib/dns/rdata/in_1/kx_36.c
@@ -188,9 +188,7 @@ tostruct_in_kx(ARGS_TOSTRUCT) {
 	REQUIRE(kx != NULL);
 	REQUIRE(rdata->length != 0);
 
-	kx->common.rdclass = rdata->rdclass;
-	kx->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&kx->common, link);
+	DNS_RDATACOMMON_INIT(kx, rdata->type, rdata->rdclass);
 
 	dns_name_init(&name, NULL);
 	dns_rdata_toregion(rdata, &region);
diff --git a/lib/dns/rdata/in_1/nimloc_32.c b/lib/dns/rdata/in_1/nimloc_32.c
index 01c6f8f1b1..f2ba08ba24 100644
--- a/lib/dns/rdata/in_1/nimloc_32.c
+++ b/lib/dns/rdata/in_1/nimloc_32.c
@@ -134,9 +134,7 @@ tostruct_in_nimloc(ARGS_TOSTRUCT) {
 	REQUIRE(nimloc != NULL);
 	REQUIRE(rdata->length != 0);
 
-	nimloc->common.rdclass = rdata->rdclass;
-	nimloc->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&nimloc->common, link);
+	DNS_RDATACOMMON_INIT(nimloc, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &r);
 	nimloc->nimloc_len = r.length;
diff --git a/lib/dns/rdata/in_1/nsap-ptr_23.c b/lib/dns/rdata/in_1/nsap-ptr_23.c
index b520462142..386e26ade2 100644
--- a/lib/dns/rdata/in_1/nsap-ptr_23.c
+++ b/lib/dns/rdata/in_1/nsap-ptr_23.c
@@ -154,9 +154,7 @@ tostruct_in_nsap_ptr(ARGS_TOSTRUCT) {
 	REQUIRE(nsap_ptr != NULL);
 	REQUIRE(rdata->length != 0);
 
-	nsap_ptr->common.rdclass = rdata->rdclass;
-	nsap_ptr->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&nsap_ptr->common, link);
+	DNS_RDATACOMMON_INIT(nsap_ptr, rdata->type, rdata->rdclass);
 
 	dns_name_init(&name, NULL);
 	dns_rdata_toregion(rdata, &region);
diff --git a/lib/dns/rdata/in_1/nsap_22.c b/lib/dns/rdata/in_1/nsap_22.c
index f30819171f..ccf2a7db63 100644
--- a/lib/dns/rdata/in_1/nsap_22.c
+++ b/lib/dns/rdata/in_1/nsap_22.c
@@ -169,9 +169,7 @@ tostruct_in_nsap(ARGS_TOSTRUCT) {
 	REQUIRE(nsap != NULL);
 	REQUIRE(rdata->length != 0);
 
-	nsap->common.rdclass = rdata->rdclass;
-	nsap->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&nsap->common, link);
+	DNS_RDATACOMMON_INIT(nsap, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &r);
 	nsap->nsap_len = r.length;
diff --git a/lib/dns/rdata/in_1/px_26.c b/lib/dns/rdata/in_1/px_26.c
index 109bcc1f8f..83ad60ebc8 100644
--- a/lib/dns/rdata/in_1/px_26.c
+++ b/lib/dns/rdata/in_1/px_26.c
@@ -256,9 +256,7 @@ tostruct_in_px(ARGS_TOSTRUCT) {
 	REQUIRE(px != NULL);
 	REQUIRE(rdata->length != 0);
 
-	px->common.rdclass = rdata->rdclass;
-	px->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&px->common, link);
+	DNS_RDATACOMMON_INIT(px, rdata->type, rdata->rdclass);
 
 	dns_name_init(&name, NULL);
 	dns_rdata_toregion(rdata, &region);
diff --git a/lib/dns/rdata/in_1/srv_33.c b/lib/dns/rdata/in_1/srv_33.c
index 81d6ea8bb1..47580052e4 100644
--- a/lib/dns/rdata/in_1/srv_33.c
+++ b/lib/dns/rdata/in_1/srv_33.c
@@ -267,9 +267,7 @@ tostruct_in_srv(ARGS_TOSTRUCT) {
 	REQUIRE(srv != NULL);
 	REQUIRE(rdata->length != 0);
 
-	srv->common.rdclass = rdata->rdclass;
-	srv->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&srv->common, link);
+	DNS_RDATACOMMON_INIT(srv, rdata->type, rdata->rdclass);
 
 	dns_name_init(&name, NULL);
 	dns_rdata_toregion(rdata, &region);
diff --git a/lib/dns/rdata/in_1/svcb_64.c b/lib/dns/rdata/in_1/svcb_64.c
index 3891ab7664..bdb4d5188f 100644
--- a/lib/dns/rdata/in_1/svcb_64.c
+++ b/lib/dns/rdata/in_1/svcb_64.c
@@ -1013,9 +1013,7 @@ generic_tostruct_in_svcb(ARGS_TOSTRUCT) {
 	REQUIRE(svcb != NULL);
 	REQUIRE(rdata->length != 0);
 
-	svcb->common.rdclass = rdata->rdclass;
-	svcb->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&svcb->common, link);
+	DNS_RDATACOMMON_INIT(svcb, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &region);
 
diff --git a/lib/dns/rdata/in_1/wks_11.c b/lib/dns/rdata/in_1/wks_11.c
index fa9229cbfa..6399683d94 100644
--- a/lib/dns/rdata/in_1/wks_11.c
+++ b/lib/dns/rdata/in_1/wks_11.c
@@ -311,9 +311,7 @@ tostruct_in_wks(ARGS_TOSTRUCT) {
 	REQUIRE(rdata->rdclass == dns_rdataclass_in);
 	REQUIRE(rdata->length != 0);
 
-	wks->common.rdclass = rdata->rdclass;
-	wks->common.rdtype = rdata->type;
-	ISC_LINK_INIT(&wks->common, link);
+	DNS_RDATACOMMON_INIT(wks, rdata->type, rdata->rdclass);
 
 	dns_rdata_toregion(rdata, &region);
 	n = uint32_fromregion(&region);