relay.h 4.6 KB

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  1. /* Copyright (c) 2001 Matej Pfajfar.
  2. * Copyright (c) 2001-2004, Roger Dingledine.
  3. * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
  4. * Copyright (c) 2007-2016, The Tor Project, Inc. */
  5. /* See LICENSE for licensing information */
  6. /**
  7. * \file relay.h
  8. * \brief Header file for relay.c.
  9. **/
  10. #ifndef TOR_RELAY_H
  11. #define TOR_RELAY_H
  12. extern uint64_t stats_n_relay_cells_relayed;
  13. extern uint64_t stats_n_relay_cells_delivered;
  14. int circuit_receive_relay_cell(cell_t *cell, circuit_t *circ,
  15. cell_direction_t cell_direction);
  16. void relay_header_pack(uint8_t *dest, const relay_header_t *src);
  17. void relay_header_unpack(relay_header_t *dest, const uint8_t *src);
  18. int relay_send_command_from_edge_(streamid_t stream_id, circuit_t *circ,
  19. uint8_t relay_command, const char *payload,
  20. size_t payload_len, crypt_path_t *cpath_layer,
  21. const char *filename, int lineno);
  22. #define relay_send_command_from_edge(stream_id, circ, relay_command, payload, \
  23. payload_len, cpath_layer) \
  24. relay_send_command_from_edge_((stream_id), (circ), (relay_command), \
  25. (payload), (payload_len), (cpath_layer), \
  26. __FILE__, __LINE__)
  27. int connection_edge_send_command(edge_connection_t *fromconn,
  28. uint8_t relay_command, const char *payload,
  29. size_t payload_len);
  30. int connection_edge_package_raw_inbuf(edge_connection_t *conn,
  31. int package_partial,
  32. int *max_cells);
  33. void connection_edge_consider_sending_sendme(edge_connection_t *conn);
  34. extern uint64_t stats_n_data_cells_packaged;
  35. extern uint64_t stats_n_data_bytes_packaged;
  36. extern uint64_t stats_n_data_cells_received;
  37. extern uint64_t stats_n_data_bytes_received;
  38. void dump_cell_pool_usage(int severity);
  39. size_t packed_cell_mem_cost(void);
  40. int have_been_under_memory_pressure(void);
  41. /* For channeltls.c */
  42. void packed_cell_free(packed_cell_t *cell);
  43. void cell_queue_init(cell_queue_t *queue);
  44. void cell_queue_clear(cell_queue_t *queue);
  45. void cell_queue_append(cell_queue_t *queue, packed_cell_t *cell);
  46. void cell_queue_append_packed_copy(circuit_t *circ, cell_queue_t *queue,
  47. int exitward, const cell_t *cell,
  48. int wide_circ_ids, int use_stats);
  49. void append_cell_to_circuit_queue(circuit_t *circ, channel_t *chan,
  50. cell_t *cell, cell_direction_t direction,
  51. streamid_t fromstream);
  52. void channel_unlink_all_circuits(channel_t *chan, smartlist_t *detached_out);
  53. MOCK_DECL(int, channel_flush_from_first_active_circuit,
  54. (channel_t *chan, int max));
  55. void assert_circuit_mux_okay(channel_t *chan);
  56. void update_circuit_on_cmux_(circuit_t *circ, cell_direction_t direction,
  57. const char *file, int lineno);
  58. #define update_circuit_on_cmux(circ, direction) \
  59. update_circuit_on_cmux_((circ), (direction), SHORT_FILE__, __LINE__)
  60. int append_address_to_payload(uint8_t *payload_out, const tor_addr_t *addr);
  61. const uint8_t *decode_address_from_payload(tor_addr_t *addr_out,
  62. const uint8_t *payload,
  63. int payload_len);
  64. void circuit_clear_cell_queue(circuit_t *circ, channel_t *chan);
  65. void stream_choice_seed_weak_rng(void);
  66. int relay_crypt(circuit_t *circ, cell_t *cell, cell_direction_t cell_direction,
  67. crypt_path_t **layer_hint, char *recognized);
  68. circid_t packed_cell_get_circid(const packed_cell_t *cell, int wide_circ_ids);
  69. #ifdef RELAY_PRIVATE
  70. STATIC int connected_cell_parse(const relay_header_t *rh, const cell_t *cell,
  71. tor_addr_t *addr_out, int *ttl_out);
  72. /** An address-and-ttl tuple as yielded by resolved_cell_parse */
  73. typedef struct address_ttl_s {
  74. tor_addr_t addr;
  75. char *hostname;
  76. int ttl;
  77. } address_ttl_t;
  78. STATIC void address_ttl_free(address_ttl_t *addr);
  79. STATIC int resolved_cell_parse(const cell_t *cell, const relay_header_t *rh,
  80. smartlist_t *addresses_out, int *errcode_out);
  81. STATIC int connection_edge_process_resolved_cell(edge_connection_t *conn,
  82. const cell_t *cell,
  83. const relay_header_t *rh);
  84. STATIC packed_cell_t *packed_cell_new(void);
  85. STATIC packed_cell_t *cell_queue_pop(cell_queue_t *queue);
  86. STATIC size_t cell_queues_get_total_allocation(void);
  87. STATIC int cell_queues_check_size(void);
  88. #endif
  89. #endif