tor

The Tor anonymity network
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btrack.c (1511B)

      1 /* Copyright (c) 2007-2021, The Tor Project, Inc. */
      2 /* See LICENSE for licensing information */
      3 
      4 /**
      5 * \file btrack.c
      6 * \brief Bootstrap trackers
      7 *
      8 * Initializes and shuts down the specific bootstrap trackers.  These
      9 * trackers help the reporting of bootstrap progress by maintaining
     10 * state information about various subsystems within tor.  When the
     11 * correct state changes happen, these trackers emit controller
     12 * events.
     13 *
     14 * These trackers avoid referring directly to the internals of state
     15 * objects of other subsystems.
     16 *
     17 * btrack_circuit.c contains the tracker for origin circuits.
     18 *
     19 * btrack_orconn.c contains the tracker for OR connections.
     20 *
     21 * Eventually there will be a tracker for directory downloads as well.
     22 **/
     23 
     24 #include "feature/control/btrack_circuit.h"
     25 #include "feature/control/btrack_orconn.h"
     26 #include "feature/control/btrack_sys.h"
     27 #include "lib/pubsub/pubsub.h"
     28 #include "lib/subsys/subsys.h"
     29 
     30 static int
     31 btrack_init(void)
     32 {
     33  if (btrack_orconn_init())
     34    return -1;
     35 
     36  return 0;
     37 }
     38 
     39 static void
     40 btrack_fini(void)
     41 {
     42  btrack_orconn_fini();
     43  btrack_circ_fini();
     44 }
     45 
     46 static int
     47 btrack_add_pubsub(pubsub_connector_t *connector)
     48 {
     49  if (btrack_orconn_add_pubsub(connector))
     50    return -1;
     51  if (btrack_circ_add_pubsub(connector))
     52    return -1;
     53 
     54  return 0;
     55 }
     56 
     57 const subsys_fns_t sys_btrack = {
     58  .name = "btrack",
     59  SUBSYS_DECLARE_LOCATION(),
     60  .supported = true,
     61  .level = 55,
     62  .initialize = btrack_init,
     63  .shutdown = btrack_fini,
     64  .add_pubsub = btrack_add_pubsub,
     65 };