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, 107 insertions, 0 deletions

diff --git a/src/core/or/circuitbuild.h b/src/core/or/circuitbuild.h
new file mode 100644
index 0000000000..9f5d99c2a5
--- /dev/null
+++ b/src/core/or/circuitbuild.h
@@ -0,0 +1,107 @@
+/* Copyright (c) 2001 Matej Pfajfar.
+ * Copyright (c) 2001-2004, Roger Dingledine.
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2018, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+/**
+ * \file circuitbuild.h
+ * \brief Header file for circuitbuild.c.
+ **/
+
+#ifndef TOR_CIRCUITBUILD_H
+#define TOR_CIRCUITBUILD_H
+
+struct ed25519_public_key_t;
+struct curve25519_public_key_t;
+
+int route_len_for_purpose(uint8_t purpose, extend_info_t *exit_ei);
+char *circuit_list_path(origin_circuit_t *circ, int verbose);
+char *circuit_list_path_for_controller(origin_circuit_t *circ);
+void circuit_log_path(int severity, unsigned int domain,
+                      origin_circuit_t *circ);
+origin_circuit_t *origin_circuit_init(uint8_t purpose, int flags);
+origin_circuit_t *circuit_establish_circuit(uint8_t purpose,
+                                            extend_info_t *exit,
+                                            int flags);
+struct circuit_guard_state_t *origin_circuit_get_guard_state(
+                                            origin_circuit_t *circ);
+int circuit_handle_first_hop(origin_circuit_t *circ);
+void circuit_n_chan_done(channel_t *chan, int status,
+                         int close_origin_circuits);
+int inform_testing_reachability(void);
+int circuit_timeout_want_to_count_circ(const origin_circuit_t *circ);
+int circuit_send_next_onion_skin(origin_circuit_t *circ);
+void circuit_note_clock_jumped(int64_t seconds_elapsed, bool was_idle);
+int circuit_extend(cell_t *cell, circuit_t *circ);
+int circuit_init_cpath_crypto(crypt_path_t *cpath,
+                              const char *key_data, size_t key_data_len,
+                              int reverse, int is_hs_v3);
+struct created_cell_t;
+int circuit_finish_handshake(origin_circuit_t *circ,
+                             const struct created_cell_t *created_cell);
+int circuit_truncated(origin_circuit_t *circ, crypt_path_t *layer,
+                      int reason);
+int onionskin_answer(or_circuit_t *circ,
+                     const struct created_cell_t *created_cell,
+                     const char *keys, size_t keys_len,
+                     const uint8_t *rend_circ_nonce);
+MOCK_DECL(int, circuit_all_predicted_ports_handled, (time_t now,
+                                                     int *need_uptime,
+                                                     int *need_capacity));
+
+int circuit_append_new_exit(origin_circuit_t *circ, extend_info_t *info);
+int circuit_extend_to_new_exit(origin_circuit_t *circ, extend_info_t *info);
+void onion_append_to_cpath(crypt_path_t **head_ptr, crypt_path_t *new_hop);
+extend_info_t *extend_info_new(const char *nickname,
+                               const char *rsa_id_digest,
+                               const struct ed25519_public_key_t *ed_id,
+                               crypto_pk_t *onion_key,
+                               const struct curve25519_public_key_t *ntor_key,
+                               const tor_addr_t *addr, uint16_t port);
+extend_info_t *extend_info_from_node(const node_t *r, int for_direct_connect);
+extend_info_t *extend_info_dup(extend_info_t *info);
+void extend_info_free_(extend_info_t *info);
+#define extend_info_free(info) \
+  FREE_AND_NULL(extend_info_t, extend_info_free_, (info))
+int extend_info_addr_is_allowed(const tor_addr_t *addr);
+int extend_info_supports_tap(const extend_info_t* ei);
+int extend_info_supports_ntor(const extend_info_t* ei);
+int circuit_can_use_tap(const origin_circuit_t *circ);
+int circuit_has_usable_onion_key(const origin_circuit_t *circ);
+int extend_info_has_preferred_onion_key(const extend_info_t* ei);
+const uint8_t *build_state_get_exit_rsa_id(cpath_build_state_t *state);
+const node_t *build_state_get_exit_node(cpath_build_state_t *state);
+const char *build_state_get_exit_nickname(cpath_build_state_t *state);
+
+struct circuit_guard_state_t;
+
+const node_t *choose_good_entry_server(uint8_t purpose,
+                           cpath_build_state_t *state,
+                           struct circuit_guard_state_t **guard_state_out);
+void circuit_upgrade_circuits_from_guard_wait(void);
+
+#ifdef CIRCUITBUILD_PRIVATE
+STATIC circid_t get_unique_circ_id_by_chan(channel_t *chan);
+STATIC int new_route_len(uint8_t purpose, extend_info_t *exit_ei,
+                         smartlist_t *nodes);
+MOCK_DECL(STATIC int, count_acceptable_nodes, (smartlist_t *nodes));
+
+STATIC int onion_extend_cpath(origin_circuit_t *circ);
+
+STATIC int
+onion_pick_cpath_exit(origin_circuit_t *circ, extend_info_t *exit_ei,
+                      int is_hs_v3_rp_circuit);
+
+#if defined(ENABLE_TOR2WEB_MODE) || defined(TOR_UNIT_TESTS)
+enum router_crn_flags_t;
+STATIC const node_t *pick_tor2web_rendezvous_node(
+                                     enum router_crn_flags_t flags,
+                                     const or_options_t *options);
+unsigned int cpath_get_n_hops(crypt_path_t **head_ptr);
+
+#endif /* defined(ENABLE_TOR2WEB_MODE) || defined(TOR_UNIT_TESTS) */
+
+#endif /* defined(CIRCUITBUILD_PRIVATE) */
+
+#endif /* !defined(TOR_CIRCUITBUILD_H) */