prop224: Flag router with HSIntro/HSDir using protover

Note down in the routerstatus_t of a node if the router supports the HSIntro=4
version for the ed25519 authentication key and HSDir=2 version for the v3
descriptor supports.

Signed-off-by: David Goulet <dgoulet@torproject.org>

src/or/or.h

@@ -2278,6 +2278,16 @@ typedef struct routerstatus_t {
    * ed25519 identity keys on a link handshake. */
   unsigned int supports_ed25519_link_handshake:1;
 
+  /** True iff this router has a protocol list that allows it to be an
+   * introduction point supporting ed25519 authentication key which is part of
+   * the v3 protocol detailed in proposal 224. This requires HSIntro=4. */
+  unsigned int supports_ed25519_hs_intro : 1;
+
+  /** True iff this router has a protocol list that allows it to be an hidden
+   * service directory supporting version 3 as seen in proposal 224. This
+   * requires HSDir=2. */
+  unsigned int supports_v3_hsdir : 1;
+
   unsigned int has_bandwidth:1; /**< The vote/consensus had bw info */
   unsigned int has_exitsummary:1; /**< The vote/consensus had exit summaries */
   unsigned int bw_is_unmeasured:1; /**< This is a consensus entry, with

src/or/routerparse.c

@@ -2667,6 +2667,10 @@ routerstatus_parse_entry_from_string(memarea_t *area,
       protocol_list_supports_protocol(tok->args[0], PRT_RELAY, 2);
     rs->supports_ed25519_link_handshake =
       protocol_list_supports_protocol(tok->args[0], PRT_LINKAUTH, 3);
+    rs->supports_ed25519_hs_intro =
+      protocol_list_supports_protocol(tok->args[0], PRT_HSINTRO, 4);
+    rs->supports_v3_hsdir =
+      protocol_list_supports_protocol(tok->args[0], PRT_HSDIR, 2);
   }
   if ((tok = find_opt_by_keyword(tokens, K_V))) {
     tor_assert(tok->n_args == 1);