Save original virtual port in edge conn HS ident.

src/core/or/connection_edge.c

@@ -607,8 +607,7 @@ export_hs_client_circuit_id_haproxy(const edge_connection_t *edge_conn,
   const char dst_ipv6[] = "::1";
   /* See RFC4193 regarding fc00::/7 */
   const char src_ipv6_prefix[] = "fc00:dead:beef:4dad:";
-  /* TODO: retain virtual port and use as destination port */
-  uint16_t dst_port = 443;
+  uint16_t dst_port = 0;
   uint16_t src_port = 1; /* default value */
   uint32_t gid = 0; /* default value */
 
@@ -618,6 +617,11 @@ export_hs_client_circuit_id_haproxy(const edge_connection_t *edge_conn,
     src_port = gid & 0x0000ffff;
   }
 
+  /* Grab the original dest port from the hs ident */
+  if (edge_conn->hs_ident) {
+    dst_port = edge_conn->hs_ident->orig_virtual_port;
+  }
+
   /* Build the string */
   tor_asprintf(&buf, "PROXY TCP6 %s:%x %s %d %d\r\n",
                src_ipv6_prefix, gid, dst_ipv6, src_port, dst_port);

src/feature/hs/hs_common.c

@@ -882,6 +882,11 @@ hs_set_conn_addr_port(const smartlist_t *ports, edge_connection_t *conn)
   smartlist_free(matching_ports);
   if (chosen_port) {
     if (!(chosen_port->is_unix_addr)) {
+      /* save the original destination before we overwrite it */
+      if (conn->hs_ident) {
+        conn->hs_ident->orig_virtual_port = TO_CONN(conn)->port;
+      }
+
       /* Get a non-AF_UNIX connection ready for connection_exit_connect() */
       tor_addr_copy(&TO_CONN(conn)->addr, &chosen_port->real_addr);
       TO_CONN(conn)->port = chosen_port->real_port;

src/feature/hs/hs_ident.h

@@ -111,6 +111,10 @@ typedef struct hs_ident_edge_conn_t {
    * in the onion address. */
   ed25519_public_key_t identity_pk;
 
+  /* The original virtual port that was used by the client to access the onion
+   * service, regardless of the internal port forwarding that might have
+   * happened on the service-side. */
+  uint16_t orig_virtual_port;
   /* XXX: Client authorization. */
 } hs_ident_edge_conn_t;