Merge branch 'tor-gitlab/mr/536'

src/feature/hs/hs_cell.c

@@ -952,6 +952,12 @@ hs_cell_parse_introduce2(hs_cell_introduce2_data_t *data,
     }
   }
 
+  /* If the client asked for congestion control, but we don't support it,
+   * that's a failure. It should not have asked, based on our descriptor. */
+  if (data->cc_enabled && !congestion_control_enabled()) {
+    goto done;
+  }
+
   /* Success. */
   ret = 0;
   log_info(LD_REND, "Valid INTRODUCE2 cell. Launching rendezvous circuit.");

src/feature/hs/hs_circuit.c

@@ -996,6 +996,7 @@ hs_circ_handle_introduce2(const hs_service_t *service,
   data.payload_len = payload_len;
   data.link_specifiers = smartlist_new();
   data.replay_cache = ip->replay_cache;
+  data.cc_enabled = 0;
 
   if (get_subcredential_for_handling_intro2_cell(service,
                                                  &data, subcredential)) {

src/test/test_hs_service.c

@@ -2330,6 +2330,7 @@ test_intro2_handling(void *arg)
   intro_circ->cpath->prev = intro_circ->cpath;
   intro_circ->hs_ident = tor_malloc_zero(sizeof(*intro_circ->hs_ident));
   origin_circuit_t rend_circ;
+  TO_CIRCUIT(&rend_circ)->ccontrol = NULL;
   rend_circ.hs_ident = tor_malloc_zero(sizeof(*rend_circ.hs_ident));
   curve25519_keypair_generate(&rend_circ.hs_ident->rendezvous_client_kp, 0);
   memset(rend_circ.hs_ident->rendezvous_cookie, 'r', HS_REND_COOKIE_LEN);