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Tor 0.4.9.3-alpha-dev
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#include <edge_connection_st.h>
Data Fields | |
| connection_t | base_ |
| struct edge_connection_t * | next_stream |
| int | package_window |
| int | deliver_window |
| struct circuit_t * | on_circuit |
| struct crypt_path_t * | cpath_layer |
| struct hs_ident_edge_conn_t * | hs_ident |
| uint32_t | address_ttl |
| uint32_t | begincell_flags |
| streamid_t | stream_id |
| uint16_t | end_reason |
| uint32_t | n_read |
| uint32_t | n_written |
| unsigned int | is_dns_request:1 |
| unsigned int | is_reverse_dns_lookup:1 |
| unsigned int | edge_has_sent_end:1 |
| uint64_t | dirreq_id |
| token_bucket_rw_t | bucket |
| uint64_t | drain_start_usec |
| uint64_t | xoff_grace_period_start_usec |
| uint32_t | drained_bytes |
| uint32_t | prev_drained_bytes |
| uint32_t | ewma_drain_rate |
| uint32_t | ewma_rate_last_sent |
| uint32_t | total_bytes_xmit |
| uint8_t | num_xoff_recv |
| uint8_t | num_xon_recv |
| uint8_t | xoff_sent: 1 |
| uint8_t | xoff_received: 1 |
Subtype of connection_t for an "edge connection" – that is, an entry (ap) connection, or an exit.
Definition at line 22 of file edge_connection_st.h.
| uint32_t address_ttl |
TTL for address-to-addr mapping on exit connection. Exit connections only.
Definition at line 47 of file edge_connection_st.h.
Referenced by connection_edge_end(), connection_edge_finished_connecting(), connection_exit_connect(), dns_resolve_impl(), send_resolved_cell(), send_resolved_hostname_cell(), and set_exitconn_info_from_resolve().
| connection_t base_ |
Definition at line 23 of file edge_connection_st.h.
| uint32_t begincell_flags |
Definition at line 49 of file edge_connection_st.h.
| token_bucket_rw_t bucket |
Used for rate limiting the read side of this edge connection when congestion control is enabled on its circuit. The XON cell ewma_drain_rate parameter is used to set the bucket limits.
Definition at line 84 of file edge_connection_st.h.
Referenced by circuit_process_stream_xon(), connection_bucket_read_limit(), connection_buckets_decrement(), and edge_connection_new().
| struct crypt_path_t* cpath_layer |
A pointer to which node in the circ this conn exits at. Set for AP connections and for hidden service exit connections. Note that edges that use conflux should use the helpers in conflux_util.c instead of accessing this directly.
Definition at line 40 of file edge_connection_st.h.
Referenced by circuit_detach_stream(), connection_ap_expire_beginning(), connection_ap_get_begincell_flags(), connection_ap_handshake_send_begin(), connection_edge_destroy(), connection_edge_package_raw_inbuf(), connection_edge_send_command(), edge_get_max_rtt(), edge_uses_cpath(), edge_uses_flow_control(), and handle_hs_exit_conn().
| int deliver_window |
How many more relay cells can end at me?
Definition at line 29 of file edge_connection_st.h.
Referenced by connection_ap_handshake_send_begin(), connection_exit_begin_conn(), connection_half_edge_add(), and sendme_connection_edge_consider_sending().
| uint64_t dirreq_id |
Unique ID for directory requests; this used to be in connection_t, but that's going away and being used on channels instead. We still tag edge connections with dirreq_id from circuits, so it's copied here.
Definition at line 77 of file edge_connection_st.h.
Referenced by connection_exit_begin_conn(), and connection_exit_connect_dir().
| uint64_t drain_start_usec |
Monotime timestamp of the last time we sent a flow control message for this edge, used to compute advisory rates
Definition at line 89 of file edge_connection_st.h.
Referenced by compute_drain_rate(), and flow_control_decide_xon().
| uint32_t drained_bytes |
Number of bytes written since we either emptied our buffers, or sent an advisory drate rate. Can wrap, buf if so, we must reset the usec timestamp above. (Or make this u64, idk).
Definition at line 108 of file edge_connection_st.h.
Referenced by flow_control_decide_xon().
| unsigned int edge_has_sent_end |
For debugging; only used on edge connections. Set once we've set the stream end, and check in connection_about_to_close_connection().
Definition at line 69 of file edge_connection_st.h.
Referenced by circuit_about_to_free(), circuit_log_ancient_one_hop_circuits(), conn_write_callback(), connection_ap_expire_beginning(), connection_edge_about_to_close(), connection_edge_destroy(), connection_edge_end(), connection_edge_process_relay_cell_not_open(), connection_edge_send_command(), handle_control_attachstream(), and handle_relay_msg().
| uint16_t end_reason |
The reason why this connection is closing; passed to the controller.
Definition at line 56 of file edge_connection_st.h.
Referenced by circuit_about_to_free(), circuits_handle_oom(), conn_write_callback(), connection_ap_about_to_close(), connection_ap_expire_beginning(), connection_edge_destroy(), connection_edge_end(), connection_edge_package_raw_inbuf(), connection_edge_process_relay_cell_not_open(), connection_edge_send_command(), handle_control_attachstream(), and handle_relay_msg().
| uint32_t ewma_drain_rate |
N_EWMA of the drain rate of writes on this edge conn while buffers were present.
Definition at line 115 of file edge_connection_st.h.
Referenced by circuit_send_stream_xon(), flow_control_decide_xoff(), flow_control_decide_xon(), and stream_drain_rate_changed().
| uint32_t ewma_rate_last_sent |
The ewma drain rate the last time we sent an xon.
Definition at line 120 of file edge_connection_st.h.
Referenced by circuit_send_stream_xon(), flow_control_decide_xon(), and stream_drain_rate_changed().
| struct hs_ident_edge_conn_t* hs_ident |
Definition at line 45 of file edge_connection_st.h.
| unsigned int is_dns_request |
True iff this connection is for a DNS request only.
Definition at line 65 of file edge_connection_st.h.
Referenced by dnsserv_launch_request(), and evdns_server_callback().
| unsigned int is_reverse_dns_lookup |
True iff this connection is for a PTR DNS request. (exit only)
Definition at line 67 of file edge_connection_st.h.
Referenced by dns_resolve_impl(), inform_pending_connections(), and set_exitconn_info_from_resolve().
| uint32_t n_read |
Bytes read since last call to control_event_stream_bandwidth_used()
Definition at line 59 of file edge_connection_st.h.
Referenced by connection_buf_read_from_socket(), control_event_stream_bandwidth(), and control_event_stream_bandwidth_used().
| uint32_t n_written |
Bytes written since last call to control_event_stream_bandwidth_used()
Definition at line 62 of file edge_connection_st.h.
Referenced by connection_handle_write_impl(), control_event_stream_bandwidth(), and control_event_stream_bandwidth_used().
| struct edge_connection_t* next_stream |
Points to the next stream at this edge, if any
Definition at line 25 of file edge_connection_st.h.
Referenced by assert_circuit_ok(), circuit_about_to_free(), circuit_consider_stop_edge_reading(), circuit_detach_stream(), circuit_dump_by_conn(), circuit_free_all(), circuit_get_streams_max_data_age(), circuit_log_ancient_one_hop_circuits(), circuit_resume_edge_reading_helper(), connection_exit_connect_dir(), dns_resolve(), get_unique_stream_id_by_circ(), handle_hs_exit_conn(), inform_pending_connections(), marked_circuit_streams_free_bytes(), relay_lookup_conn(), and set_block_state_for_streams().
| uint8_t num_xoff_recv |
Number of XOFFs received
Definition at line 130 of file edge_connection_st.h.
Referenced by circuit_process_stream_xoff(), circuit_process_stream_xon(), and flow_control_note_sent_data().
| uint8_t num_xon_recv |
Number of XONs received
Definition at line 133 of file edge_connection_st.h.
Referenced by circuit_process_stream_xoff(), circuit_process_stream_xon(), and flow_control_note_sent_data().
| struct circuit_t* on_circuit |
The circuit (if any) that this edge connection is using. Note that edges that use conflux should use the helpers in conflux_util.c instead of accessing this directly.
Definition at line 34 of file edge_connection_st.h.
Referenced by circuit_about_to_free(), circuit_detach_stream(), circuit_get_by_edge_conn(), connection_ap_get_begincell_flags(), connection_ap_handshake_send_begin(), connection_ap_handshake_send_resolve(), connection_ap_handshake_socks_reply(), connection_ap_supports_optimistic_data(), connection_dir_is_anonymous(), connection_edge_destroy(), connection_edge_process_resolved_cell(), connection_edge_send_command(), connection_exit_begin_conn(), connection_exit_begin_resolve(), connection_exit_connect_dir(), dns_resolve(), edge_get_max_rtt(), edge_uses_cpath(), edge_uses_flow_control(), handle_hs_exit_conn(), inform_pending_connections(), and link_apconn_to_circ().
| int package_window |
How many more relay cells can I send into the circuit?
Definition at line 27 of file edge_connection_st.h.
Referenced by circuit_log_ancient_one_hop_circuits(), circuit_resume_edge_reading_helper(), connection_ap_handshake_send_begin(), connection_edge_finished_connecting(), connection_edge_package_raw_inbuf(), connection_exit_begin_conn(), and connection_half_edge_add().
| uint32_t prev_drained_bytes |
Definition at line 109 of file edge_connection_st.h.
| streamid_t stream_id |
Flags sent or received in the BEGIN cell for this connection The stream ID used for this edge connection on its circuit
Definition at line 52 of file edge_connection_st.h.
Referenced by circuit_detach_stream(), connection_ap_handshake_send_begin(), connection_ap_handshake_send_resolve(), connection_edge_send_command(), connection_exit_begin_conn(), connection_exit_begin_resolve(), connection_half_edge_add(), get_unique_stream_id_by_circ(), handle_hs_exit_conn(), handle_relay_msg(), and relay_lookup_conn().
| uint32_t total_bytes_xmit |
The following fields are used to count the total bytes sent on this stream, and compare them to the number of XON and XOFFs received, so that clients can check rate limits of XOFF/XON to prevent dropmark attacks.
Definition at line 127 of file edge_connection_st.h.
Referenced by circuit_process_stream_xoff(), circuit_process_stream_xon(), and flow_control_note_sent_data().
| uint64_t xoff_grace_period_start_usec |
Monotime timestamp of when we started the XOFF grace period for this edge.
See the comments on XOFF_GRACE_PERIOD_USEC for an explanation on how this is used.
A value of 0 is considered "unset". This isn't great, but we set this field as the output from monotime_absolute_usec() which should only ever be 0 within the first 1 microsecond of initializing the monotonic timer subsystem.
Definition at line 101 of file edge_connection_st.h.
Referenced by flow_control_decide_xoff().
| uint8_t xoff_received |
Flag that tells us if an XOFF has been received; cleared when we get an XON. Used to ensure that this edge keeps reads on its edge socket disabled.
Definition at line 143 of file edge_connection_st.h.
Referenced by circuit_process_stream_xoff(), circuit_process_stream_xon(), circuit_resume_edge_reading_helper(), and connection_read_bw_exhausted().
| uint8_t xoff_sent |
Flag that tells us if an XOFF has been sent; cleared when we send an XON. Used to avoid sending multiple
Definition at line 138 of file edge_connection_st.h.
Referenced by circuit_send_stream_xoff(), circuit_send_stream_xon(), flow_control_decide_xoff(), and flow_control_decide_xon().
1.9.8