Move literally everything out of src/or

This commit won't build yet -- it just puts everything in a slightly
more logical place.

The reasoning here is that "src/core" will hold the stuff that every (or
nearly every) tor instance will need in order to do onion routing.
Other features (including some necessary ones) will live in
"src/feature".  The "src/app" directory will hold the stuff needed
to have Tor be an application you can actually run.

This commit DOES NOT refactor the former contents of src/or into a
logical set of acyclic libraries, or change any code at all.  That
will have to come in the future.

We will continue to move things around and split them in the future,
but I hope this lays a reasonable groundwork for doing so.

1 files changed, 0 insertions, 140 deletions

diff --git a/src/or/dos.h b/src/or/dos.h
deleted file mode 100644
index 760ef11057..0000000000
--- a/src/or/dos.h
+++ /dev/null
@@ -1,140 +0,0 @@
-/* Copyright (c) 2018-2018, The Tor Project, Inc. */
-/* See LICENSE for licensing information */
-
-/*
- * \file dos.h
- * \brief Header file for dos.c
- */
-
-#ifndef TOR_DOS_H
-#define TOR_DOS_H
-
-/* Structure that keeps stats of client connection per-IP. */
-typedef struct cc_client_stats_t {
-  /* Number of allocated circuits remaining for this address.  It is
-   * decremented every time a new circuit is seen for this client address and
-   * if the count goes to 0, we have a positive detection. */
-  uint32_t circuit_bucket;
-
-  /* When was the last time we've refilled the circuit bucket? This is used to
-   * know if we need to refill the bucket when a new circuit is seen. It is
-   * synchronized using approx_time(). */
-  time_t last_circ_bucket_refill_ts;
-
-  /* This client address was detected to be above the circuit creation rate
-   * and this timestamp indicates until when it should remain marked as
-   * detected so we can apply a defense for the address. It is synchronized
-   * using the approx_time(). */
-  time_t marked_until_ts;
-} cc_client_stats_t;
-
-/* This object is a top level object that contains everything related to the
- * per-IP client DoS mitigation. Because it is per-IP, it is used in the geoip
- * clientmap_entry_t object. */
-typedef struct dos_client_stats_t {
-  /* Concurrent connection count from the specific address. 2^32 is most
-   * likely way too big for the amount of allowed file descriptors. */
-  uint32_t concurrent_count;
-
-  /* Circuit creation statistics. This is only used if the circuit creation
-   * subsystem has been enabled (dos_cc_enabled). */
-  cc_client_stats_t cc_stats;
-} dos_client_stats_t;
-
-/* General API. */
-
-/* Stub. */
-struct clientmap_entry_t;
-
-void dos_init(void);
-void dos_free_all(void);
-void dos_consensus_has_changed(const networkstatus_t *ns);
-int dos_enabled(void);
-void dos_log_heartbeat(void);
-void dos_geoip_entry_about_to_free(const struct clientmap_entry_t *geoip_ent);
-
-void dos_new_client_conn(or_connection_t *or_conn);
-void dos_close_client_conn(const or_connection_t *or_conn);
-
-int dos_should_refuse_single_hop_client(void);
-void dos_note_refuse_single_hop_client(void);
-
-/*
- * Circuit creation DoS mitigation subsystemn interface.
- */
-
-/* DoSCircuitCreationEnabled default. Disabled by default. */
-#define DOS_CC_ENABLED_DEFAULT 0
-/* DoSCircuitCreationDefenseType maps to the dos_cc_defense_type_t enum. */
-#define DOS_CC_DEFENSE_TYPE_DEFAULT DOS_CC_DEFENSE_REFUSE_CELL
-/* DoSCircuitCreationMinConnections default */
-#define DOS_CC_MIN_CONCURRENT_CONN_DEFAULT 3
-/* DoSCircuitCreationRateTenths is 3 per seconds. */
-#define DOS_CC_CIRCUIT_RATE_DEFAULT 3
-/* DoSCircuitCreationBurst default. */
-#define DOS_CC_CIRCUIT_BURST_DEFAULT 90
-/* DoSCircuitCreationDefenseTimePeriod in seconds. */
-#define DOS_CC_DEFENSE_TIME_PERIOD_DEFAULT (60 * 60)
-
-/* Type of defense that we can use for the circuit creation DoS mitigation. */
-typedef enum dos_cc_defense_type_t {
-  /* No defense used. */
-  DOS_CC_DEFENSE_NONE             = 1,
-  /* Refuse any cells which means a DESTROY cell will be sent back. */
-  DOS_CC_DEFENSE_REFUSE_CELL      = 2,
-
-  /* Maximum value that can be used. Useful for the boundaries of the
-   * consensus parameter. */
-  DOS_CC_DEFENSE_MAX              = 2,
-} dos_cc_defense_type_t;
-
-void dos_cc_new_create_cell(channel_t *channel);
-dos_cc_defense_type_t dos_cc_get_defense_type(channel_t *chan);
-
-/*
- * Concurrent connection DoS mitigation interface.
- */
-
-/* DoSConnectionEnabled default. Disabled by default. */
-#define DOS_CONN_ENABLED_DEFAULT 0
-/* DoSConnectionMaxConcurrentCount default. */
-#define DOS_CONN_MAX_CONCURRENT_COUNT_DEFAULT 100
-/* DoSConnectionDefenseType maps to the dos_conn_defense_type_t enum. */
-#define DOS_CONN_DEFENSE_TYPE_DEFAULT DOS_CONN_DEFENSE_CLOSE
-
-/* Type of defense that we can use for the concurrent connection DoS
- * mitigation. */
-typedef enum dos_conn_defense_type_t {
-  /* No defense used. */
-  DOS_CONN_DEFENSE_NONE             = 1,
-  /* Close immediately the connection meaning refuse it. */
-  DOS_CONN_DEFENSE_CLOSE            = 2,
-
-  /* Maximum value that can be used. Useful for the boundaries of the
-   * consensus parameter. */
-  DOS_CONN_DEFENSE_MAX              = 2,
-} dos_conn_defense_type_t;
-
-dos_conn_defense_type_t dos_conn_addr_get_defense_type(const tor_addr_t *addr);
-
-#ifdef DOS_PRIVATE
-
-STATIC uint32_t get_param_conn_max_concurrent_count(
-                                              const networkstatus_t *ns);
-STATIC uint32_t get_param_cc_circuit_burst(const networkstatus_t *ns);
-STATIC uint32_t get_param_cc_min_concurrent_connection(
-                                            const networkstatus_t *ns);
-
-STATIC uint64_t get_circuit_rate_per_second(void);
-STATIC void cc_stats_refill_bucket(cc_client_stats_t *stats,
-                                   const tor_addr_t *addr);
-
-MOCK_DECL(STATIC unsigned int, get_param_cc_enabled,
-          (const networkstatus_t *ns));
-MOCK_DECL(STATIC unsigned int, get_param_conn_enabled,
-          (const networkstatus_t *ns));
-
-#endif /* TOR_DOS_PRIVATE */
-
-#endif /* TOR_DOS_H */
-