hs: Add single-onion-service line to v3 descriptor

This field indicates if the service is a Single Onion Service if present in
the descriptor.

Closes #19642

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

1 files changed, 3 insertions, 0 deletions

diff --git a/src/or/hs_descriptor.h b/src/or/hs_descriptor.h
index 8bc725674e..895bed2485 100644
--- a/src/or/hs_descriptor.h
+++ b/src/or/hs_descriptor.h
@@ -128,6 +128,9 @@ typedef struct hs_desc_encrypted_data_t {
    * in order to contact the service. Contains NULL terminated strings. */
   smartlist_t *auth_types;
 
+  /* Is this descriptor a single onion service? */
+  unsigned int single_onion_service : 1;
+
   /* A list of intro points. Contains hs_desc_intro_point_t objects. */
   smartlist_t *intro_points;
 } hs_desc_encrypted_data_t;