diff --git a/src/or/nodelist.c b/src/or/nodelist.c
index 3ac5c3e302..6ec7da798f 100644
--- a/src/or/nodelist.c
+++ b/src/or/nodelist.c
@@ -707,6 +707,48 @@ node_supports_ed25519_link_authentication(const node_t *node)
return 0;
}
+/** Return true iff node supports the hidden service directory version
+ * 3 protocol (proposal 224). */
+int
+node_supports_v3_hsdir(const node_t *node)
+{
+ tor_assert(node);
+
+ if (node->rs) {
+ return node->rs->supports_v3_hsdir;
+ }
+ if (node->ri) {
+ if (node->ri->protocol_list == NULL) {
+ return 0;
+ }
+ return protocol_list_supports_protocol(node->ri->protocol_list,
+ PRT_HSDIR, PROTOVER_HSDIR_V3);
+ }
+ tor_assert_nonfatal_unreached_once();
+ return 0;
+}
+
+/** Return true iff node supports ed25519 authentication as an hidden
+ * service introduction point.*/
+int
+node_supports_ed25519_hs_intro(const node_t *node)
+{
+ tor_assert(node);
+
+ if (node->rs) {
+ return node->rs->supports_ed25519_hs_intro;
+ }
+ if (node->ri) {
+ if (node->ri->protocol_list == NULL) {
+ return 0;
+ }
+ return protocol_list_supports_protocol(node->ri->protocol_list,
+ PRT_HSINTRO, PROTOVER_HS_INTRO_V3);
+ }
+ tor_assert_nonfatal_unreached_once();
+ return 0;
+}
+
/** Return the RSA ID key's SHA1 digest for the provided node. */
const uint8_t *
node_get_rsa_id_digest(const node_t *node)
diff --git a/src/or/nodelist.h b/src/or/nodelist.h
index 95ae778a5b..405b79d820 100644
--- a/src/or/nodelist.h
+++ b/src/or/nodelist.h
@@ -58,6 +58,8 @@ const ed25519_public_key_t *node_get_ed25519_id(const node_t *node);
int node_ed25519_id_matches(const node_t *node,
const ed25519_public_key_t *id);
int node_supports_ed25519_link_authentication(const node_t *node);
+int node_supports_v3_hsdir(const node_t *node);
+int node_supports_ed25519_hs_intro(const node_t *node);
const uint8_t *node_get_rsa_id_digest(const node_t *node);
int node_has_ipv6_addr(const node_t *node);
diff --git a/src/or/protover.h b/src/or/protover.h
index 22667bed79..2066aeec72 100644
--- a/src/or/protover.h
+++ b/src/or/protover.h
@@ -17,6 +17,11 @@
/* This is a guess. */
#define FIRST_TOR_VERSION_TO_ADVERTISE_PROTOCOLS "0.2.9.3-alpha"
+/** The protover version number that signifies HSDir support for HSv3 */
+#define PROTOVER_HSDIR_V3 2
+/** The protover version number that signifies HSv3 intro point support */
+#define PROTOVER_HS_INTRO_V3 4
+
/** List of recognized subprotocols. */
typedef enum protocol_type_t {
PRT_LINK,