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) 2007-2019, The Tor Project, Inc. */
5 /* See LICENSE for licensing information */
9 * \brief Header file for relay.c.
15 extern uint64_t stats_n_relay_cells_relayed
;
16 extern uint64_t stats_n_relay_cells_delivered
;
17 extern uint64_t stats_n_circ_max_cell_reached
;
19 void relay_consensus_has_changed(const networkstatus_t
*ns
);
20 int circuit_receive_relay_cell(cell_t
*cell
, circuit_t
*circ
,
21 cell_direction_t cell_direction
);
22 size_t cell_queues_get_total_allocation(void);
24 void relay_header_pack(uint8_t *dest
, const relay_header_t
*src
);
25 void relay_header_unpack(relay_header_t
*dest
, const uint8_t *src
);
27 relay_send_command_from_edge_
,(streamid_t stream_id
, circuit_t
*circ
,
28 uint8_t relay_command
, const char *payload
,
29 size_t payload_len
, crypt_path_t
*cpath_layer
,
30 const char *filename
, int lineno
));
31 /* Indicates to relay_send_command_from_edge() that it is a control cell. */
32 #define CONTROL_CELL_ID 0
33 #define relay_send_command_from_edge(stream_id, circ, relay_command, payload, \
34 payload_len, cpath_layer) \
35 relay_send_command_from_edge_((stream_id), (circ), (relay_command), \
36 (payload), (payload_len), (cpath_layer), \
38 int connection_edge_send_command(edge_connection_t
*fromconn
,
39 uint8_t relay_command
, const char *payload
,
41 int connection_edge_package_raw_inbuf(edge_connection_t
*conn
,
44 void connection_edge_consider_sending_sendme(edge_connection_t
*conn
);
46 extern uint64_t stats_n_data_cells_packaged
;
47 extern uint64_t stats_n_data_bytes_packaged
;
48 extern uint64_t stats_n_data_cells_received
;
49 extern uint64_t stats_n_data_bytes_received
;
51 void dump_cell_pool_usage(int severity
);
52 size_t packed_cell_mem_cost(void);
54 int have_been_under_memory_pressure(void);
56 /* For channeltls.c */
57 void packed_cell_free_(packed_cell_t
*cell
);
58 #define packed_cell_free(cell) \
59 FREE_AND_NULL(packed_cell_t, packed_cell_free_, (cell))
61 void cell_queue_init(cell_queue_t
*queue
);
62 void cell_queue_clear(cell_queue_t
*queue
);
63 void cell_queue_append(cell_queue_t
*queue
, packed_cell_t
*cell
);
64 void cell_queue_append_packed_copy(circuit_t
*circ
, cell_queue_t
*queue
,
65 int exitward
, const cell_t
*cell
,
66 int wide_circ_ids
, int use_stats
);
68 void append_cell_to_circuit_queue(circuit_t
*circ
, channel_t
*chan
,
69 cell_t
*cell
, cell_direction_t direction
,
70 streamid_t fromstream
);
72 void destroy_cell_queue_init(destroy_cell_queue_t
*queue
);
73 void destroy_cell_queue_clear(destroy_cell_queue_t
*queue
);
74 void destroy_cell_queue_append(destroy_cell_queue_t
*queue
,
78 void channel_unlink_all_circuits(channel_t
*chan
, smartlist_t
*detached_out
);
79 MOCK_DECL(int, channel_flush_from_first_active_circuit
,
80 (channel_t
*chan
, int max
));
81 MOCK_DECL(int, circuit_package_relay_cell
, (cell_t
*cell
, circuit_t
*circ
,
82 cell_direction_t cell_direction
,
83 crypt_path_t
*layer_hint
, streamid_t on_stream
,
84 const char *filename
, int lineno
));
86 void update_circuit_on_cmux_(circuit_t
*circ
, cell_direction_t direction
,
87 const char *file
, int lineno
);
88 #define update_circuit_on_cmux(circ, direction) \
89 update_circuit_on_cmux_((circ), (direction), SHORT_FILE__, __LINE__)
91 int append_address_to_payload(uint8_t *payload_out
, const tor_addr_t
*addr
);
92 const uint8_t *decode_address_from_payload(tor_addr_t
*addr_out
,
93 const uint8_t *payload
,
95 void circuit_clear_cell_queue(circuit_t
*circ
, channel_t
*chan
);
97 void stream_choice_seed_weak_rng(void);
99 circid_t
packed_cell_get_circid(const packed_cell_t
*cell
, int wide_circ_ids
);
102 STATIC
int connected_cell_parse(const relay_header_t
*rh
, const cell_t
*cell
,
103 tor_addr_t
*addr_out
, int *ttl_out
);
104 /** An address-and-ttl tuple as yielded by resolved_cell_parse */
105 typedef struct address_ttl_s
{
110 STATIC
void address_ttl_free_(address_ttl_t
*addr
);
111 #define address_ttl_free(addr) \
112 FREE_AND_NULL(address_ttl_t, address_ttl_free_, (addr))
113 STATIC
int resolved_cell_parse(const cell_t
*cell
, const relay_header_t
*rh
,
114 smartlist_t
*addresses_out
, int *errcode_out
);
115 STATIC
int connection_edge_process_resolved_cell(edge_connection_t
*conn
,
117 const relay_header_t
*rh
);
118 STATIC packed_cell_t
*packed_cell_new(void);
119 STATIC packed_cell_t
*cell_queue_pop(cell_queue_t
*queue
);
120 STATIC destroy_cell_t
*destroy_cell_queue_pop(destroy_cell_queue_t
*queue
);
121 STATIC
int cell_queues_check_size(void);
122 STATIC
int connection_edge_process_relay_cell(cell_t
*cell
, circuit_t
*circ
,
123 edge_connection_t
*conn
,
124 crypt_path_t
*layer_hint
);
126 #endif /* defined(RELAY_PRIVATE) */
128 #endif /* !defined(TOR_RELAY_H) */