tor-commits July 2021

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[tor/main] Prop#324: Add congestion control state to structs
by dgoulet＠torproject.org 30 Jul '21

30 Jul '21

commit 802d7e22c56b3ae3877d8dfa9ada1390bd86b33d Author: Mike Perry <mikeperry-git(a)torproject.org> Date: Thu Jun 10 23:10:15 2021 +0000 Prop#324: Add congestion control state to structs --- src/core/or/circuit_st.h | 4 ++++ src/core/or/crypt_path_st.h | 5 +++++ 2 files changed, 9 insertions(+) diff --git a/src/core/or/circuit_st.h b/src/core/or/circuit_st.h index 870bcbf7cf..be6429438a 100644 --- a/src/core/or/circuit_st.h +++ b/src/core/or/circuit_st.h @@ -22,6 +22,7 @@ struct hs_token_t; struct circpad_machine_spec_t; struct circpad_machine_runtime_t; +struct congestion_control_t; /** Number of padding state machines on a circuit. */ #define CIRCPAD_MAX_MACHINES (2) @@ -244,6 +245,9 @@ struct circuit_t { * that STOP commands actually correspond to the current machine, * and not a previous one. */ uint32_t padding_machine_ctr; + + /** Congestion control fields */ + struct congestion_control_t *ccontrol; }; #endif /* !defined(CIRCUIT_ST_H) */ diff --git a/src/core/or/crypt_path_st.h b/src/core/or/crypt_path_st.h index 2529b6ee41..ddc85eec14 100644 --- a/src/core/or/crypt_path_st.h +++ b/src/core/or/crypt_path_st.h @@ -29,6 +29,8 @@ struct onion_handshake_state_t { } u; }; +struct congestion_control_t; + /** Macro to encapsulate private members of a struct. * * Renames 'x' to 'x_crypt_path_private_field'. @@ -80,6 +82,9 @@ struct crypt_path_t { int deliver_window; /**< How many cells are we willing to deliver originating * at this step? */ + /** Congestion control info */ + struct congestion_control_t *ccontrol; + /*********************** Private members ****************************/ /** Private member: Cryptographic state used for encrypting and

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[tor/main] Prop#324: Hook up CC window checks for relay cell packaging
by dgoulet＠torproject.org 30 Jul '21

30 Jul '21

commit 4d8c6d570145ebad50183586ff0669820ad98822 Author: Mike Perry <mikeperry-git(a)torproject.org> Date: Fri Jun 11 23:53:59 2021 +0000 Prop#324: Hook up CC window checks for relay cell packaging --- src/core/or/relay.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/src/core/or/relay.c b/src/core/or/relay.c index 7462388f2c..e3d41d7bf0 100644 --- a/src/core/or/relay.c +++ b/src/core/or/relay.c @@ -97,6 +97,7 @@ #include "feature/nodelist/routerinfo_st.h" #include "core/or/socks_request_st.h" #include "core/or/sendme.h" +#include "core/or/congestion_control_common.h" static edge_connection_t *relay_lookup_conn(circuit_t *circ, cell_t *cell, cell_direction_t cell_direction, @@ -1574,6 +1575,7 @@ process_sendme_cell(const relay_header_t *rh, const cell_t *cell, } /* Stream level SENDME cell. */ + // TODO: Turn this off for cc_alg=1,2,3; use XON/XOFF instead ret = sendme_process_stream_level(conn, circ, rh->length); if (ret < 0) { /* Means we need to close the circuit with reason ret. */ @@ -2091,6 +2093,7 @@ void circuit_reset_sendme_randomness(circuit_t *circ) { circ->have_sent_sufficiently_random_cell = 0; + // XXX: do we need to change this check for congestion control? circ->send_randomness_after_n_cells = CIRCWINDOW_INCREMENT / 2 + crypto_fast_rng_get_uint(get_thread_fast_rng(), CIRCWINDOW_INCREMENT / 2); } @@ -2350,7 +2353,8 @@ circuit_resume_edge_reading_helper(edge_connection_t *first_conn, /* How many cells do we have space for? It will be the minimum of * the number needed to exhaust the package window, and the minimum * needed to fill the cell queue. */ - max_to_package = circ->package_window; + + max_to_package = congestion_control_get_package_window(circ, layer_hint); if (CIRCUIT_IS_ORIGIN(circ)) { cells_on_queue = circ->n_chan_cells.n; } else { @@ -2495,7 +2499,7 @@ circuit_consider_stop_edge_reading(circuit_t *circ, crypt_path_t *layer_hint) or_circuit_t *or_circ = TO_OR_CIRCUIT(circ); log_debug(domain,"considering circ->package_window %d", circ->package_window); - if (circ->package_window <= 0) { + if (congestion_control_get_package_window(circ, layer_hint) <= 0) { log_debug(domain,"yes, not-at-origin. stopped."); for (conn = or_circ->n_streams; conn; conn=conn->next_stream) connection_stop_reading(TO_CONN(conn)); @@ -2506,7 +2510,7 @@ circuit_consider_stop_edge_reading(circuit_t *circ, crypt_path_t *layer_hint) /* else, layer hint is defined, use it */ log_debug(domain,"considering layer_hint->package_window %d", layer_hint->package_window); - if (layer_hint->package_window <= 0) { + if (congestion_control_get_package_window(circ, layer_hint) <= 0) { log_debug(domain,"yes, at-origin. stopped."); for (conn = TO_ORIGIN_CIRCUIT(circ)->p_streams; conn; conn=conn->next_stream) {

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[tor/main] Prop#324: Hook up CC algs to main sendme callpoints
by dgoulet＠torproject.org 30 Jul '21

30 Jul '21

commit 31fc7591a1f69defb31b5f7b4835a3cf15cde343 Author: Mike Perry <mikeperry-git(a)torproject.org> Date: Fri Jul 9 22:10:21 2021 +0000 Prop#324: Hook up CC algs to main sendme callpoints --- src/core/or/sendme.c | 127 +++++++++++++++++++++++++++++++-------------------- src/core/or/sendme.h | 1 + 2 files changed, 79 insertions(+), 49 deletions(-) diff --git a/src/core/or/sendme.c b/src/core/or/sendme.c index ce3385ae98..900490a892 100644 --- a/src/core/or/sendme.c +++ b/src/core/or/sendme.c @@ -21,6 +21,7 @@ #include "core/or/or_circuit_st.h" #include "core/or/relay.h" #include "core/or/sendme.h" +#include "core/or/congestion_control_common.h" #include "feature/nodelist/networkstatus.h" #include "lib/ctime/di_ops.h" #include "trunnel/sendme_cell.h" @@ -64,13 +65,6 @@ pop_first_cell_digest(const circuit_t *circ) return NULL; } - /* More cell digest than the SENDME window is never suppose to happen. The - * cell should have been rejected before reaching this point due to its - * package_window down to 0 leading to a circuit close. Scream loudly but - * still pop the element so we don't memory leak. */ - tor_assert_nonfatal(smartlist_len(circ->sendme_last_digests) <= - CIRCWINDOW_START_MAX / CIRCWINDOW_INCREMENT); - circ_digest = smartlist_get(circ->sendme_last_digests, 0); smartlist_del_keeporder(circ->sendme_last_digests, 0); return circ_digest; @@ -334,17 +328,18 @@ record_cell_digest_on_circ(circuit_t *circ, const uint8_t *sendme_digest) /** Return true iff the next cell for the given cell window is expected to be * a SENDME. * - * We are able to know that because the package or deliver window value minus - * one cell (the possible SENDME cell) should be a multiple of the increment - * window value. */ + * We are able to know that because the package or inflight window value minus + * one cell (the possible SENDME cell) should be a multiple of the + * cells-per-sendme increment value (set via consensus parameter, negotiated + * for the circuit, and passed in as sendme_inc). + * + * This function is used when recording a cell digest and this is done quite + * low in the stack when decrypting or encrypting a cell. The window is only + * updated once the cell is actually put in the outbuf. + */ static bool -circuit_sendme_cell_is_next(int window) +circuit_sendme_cell_is_next(int window, int sendme_inc) { - /* At the start of the window, no SENDME will be expected. */ - if (window == CIRCWINDOW_START) { - return false; - } - /* Are we at the limit of the increment and if not, we don't expect next * cell is a SENDME. * @@ -352,11 +347,8 @@ circuit_sendme_cell_is_next(int window) * next cell is a SENDME, the window (either package or deliver) hasn't been * decremented just yet so when this is called, we are currently processing * the "window - 1" cell. - * - * This function is used when recording a cell digest and this is done quite - * low in the stack when decrypting or encrypting a cell. The window is only - * updated once the cell is actually put in the outbuf. */ - if (((window - 1) % CIRCWINDOW_INCREMENT) != 0) { + */ + if (((window - 1) % sendme_inc) != 0) { return false; } @@ -419,15 +411,16 @@ sendme_circuit_consider_sending(circuit_t *circ, crypt_path_t *layer_hint) { bool sent_one_sendme = false; const uint8_t *digest; + int sendme_inc = sendme_get_inc_count(circ, layer_hint); while ((layer_hint ? layer_hint->deliver_window : circ->deliver_window) <= - CIRCWINDOW_START - CIRCWINDOW_INCREMENT) { + CIRCWINDOW_START - sendme_inc) { log_debug(LD_CIRC,"Queuing circuit sendme."); if (layer_hint) { - layer_hint->deliver_window += CIRCWINDOW_INCREMENT; + layer_hint->deliver_window += sendme_inc; digest = cpath_get_sendme_digest(layer_hint); } else { - circ->deliver_window += CIRCWINDOW_INCREMENT; + circ->deliver_window += sendme_inc; digest = relay_crypto_get_sendme_digest(&TO_OR_CIRCUIT(circ)->crypto); } if (send_circuit_level_sendme(circ, layer_hint, digest) < 0) { @@ -448,6 +441,9 @@ sendme_circuit_consider_sending(circuit_t *circ, crypt_path_t *layer_hint) * the length of the SENDME cell payload (excluding the header). The * cell_payload is the payload. * + * This function validates the SENDME's digest, and then dispatches to + * the appropriate congestion control algorithm in use on the circuit. + * * Return 0 on success (the SENDME is valid and the package window has * been updated properly). * @@ -460,6 +456,7 @@ sendme_process_circuit_level(crypt_path_t *layer_hint, { tor_assert(circ); tor_assert(cell_payload); + congestion_control_t *cc; /* Validate the SENDME cell. Depending on the version, different validation * can be done. An invalid SENDME requires us to close the circuit. */ @@ -467,6 +464,34 @@ sendme_process_circuit_level(crypt_path_t *layer_hint, return -END_CIRC_REASON_TORPROTOCOL; } + // Get CC + if (layer_hint) { + cc = layer_hint->ccontrol; + + /* origin circuits need to count valid sendmes as valid protocol data */ + circuit_read_valid_data(TO_ORIGIN_CIRCUIT(circ), cell_payload_len); + } else { + cc = circ->ccontrol; + } + + /* If there is no CC object, assume fixed alg */ + if (!cc) { + return sendme_process_circuit_level_impl(layer_hint, circ); + } + + return congestion_control_dispatch_cc_alg(cc, circ, layer_hint); +} + +/** + * Process a SENDME for Tor's original fixed window circuit-level flow control. + * Updates the package_window and ensures that it does not exceed the max. + * + * Returns -END_CIRC_REASON_TORPROTOCOL if the max is exceeded, otherwise + * returns 0. + */ +int +sendme_process_circuit_level_impl(crypt_path_t *layer_hint, circuit_t *circ) +{ /* If we are the origin of the circuit, we are the Client so we use the * layer hint (the Exit hop) for the package window tracking. */ if (CIRCUIT_IS_ORIGIN(circ)) { @@ -486,10 +511,6 @@ sendme_process_circuit_level(crypt_path_t *layer_hint, layer_hint->package_window += CIRCWINDOW_INCREMENT; log_debug(LD_APP, "circ-level sendme at origin, packagewindow %d.", layer_hint->package_window); - - /* We count circuit-level sendme's as valid delivered data because they - * are rate limited. */ - circuit_read_valid_data(TO_ORIGIN_CIRCUIT(circ), cell_payload_len); } else { /* We aren't the origin of this circuit so we are the Exit and thus we * track the package window with the circuit object. */ @@ -592,25 +613,39 @@ int sendme_note_circuit_data_packaged(circuit_t *circ, crypt_path_t *layer_hint) { int package_window, domain; + congestion_control_t *cc; tor_assert(circ); - if (CIRCUIT_IS_ORIGIN(circ)) { - /* Client side. */ - tor_assert(layer_hint); - --layer_hint->package_window; - package_window = layer_hint->package_window; + if (layer_hint) { + cc = layer_hint->ccontrol; domain = LD_APP; } else { - /* Exit side. */ - tor_assert(!layer_hint); - --circ->package_window; - package_window = circ->package_window; + cc = circ->ccontrol; domain = LD_EXIT; } - log_debug(domain, "Circuit package_window now %d.", package_window); - return package_window; + if (cc) { + congestion_control_note_cell_sent(cc, circ, layer_hint); + } else { + /* Fixed alg uses package_window and must update it */ + + if (CIRCUIT_IS_ORIGIN(circ)) { + /* Client side. */ + tor_assert(layer_hint); + --layer_hint->package_window; + package_window = layer_hint->package_window; + } else { + /* Exit side. */ + tor_assert(!layer_hint); + --circ->package_window; + package_window = circ->package_window; + } + log_debug(domain, "Circuit package_window now %d.", package_window); + } + + /* Return appropriate number designating how many cells can still be sent */ + return congestion_control_get_package_window(circ, layer_hint); } /* Called when a relay DATA cell is packaged for the given edge connection @@ -631,20 +666,14 @@ sendme_note_stream_data_packaged(edge_connection_t *conn) void sendme_record_cell_digest_on_circ(circuit_t *circ, crypt_path_t *cpath) { - int package_window; uint8_t *sendme_digest; tor_assert(circ); - package_window = circ->package_window; - if (cpath) { - package_window = cpath->package_window; - } - /* Is this the last cell before a SENDME? The idea is that if the * package_window reaches a multiple of the increment, after this cell, we * should expect a SENDME. */ - if (!circuit_sendme_cell_is_next(package_window)) { + if (!circuit_sent_cell_for_sendme(circ, cpath)) { return; } @@ -670,7 +699,8 @@ sendme_record_received_cell_digest(circuit_t *circ, crypt_path_t *cpath) /* Only record if the next cell is expected to be a SENDME. */ if (!circuit_sendme_cell_is_next(cpath ? cpath->deliver_window : - circ->deliver_window)) { + circ->deliver_window, + sendme_get_inc_count(circ, cpath))) { return; } @@ -692,8 +722,7 @@ sendme_record_sending_cell_digest(circuit_t *circ, crypt_path_t *cpath) tor_assert(circ); /* Only record if the next cell is expected to be a SENDME. */ - if (!circuit_sendme_cell_is_next(cpath ? cpath->package_window : - circ->package_window)) { + if (!circuit_sent_cell_for_sendme(circ, cpath)) { goto end; } diff --git a/src/core/or/sendme.h b/src/core/or/sendme.h index a008940905..c224d0a921 100644 --- a/src/core/or/sendme.h +++ b/src/core/or/sendme.h @@ -22,6 +22,7 @@ void sendme_circuit_consider_sending(circuit_t *circ, int sendme_process_circuit_level(crypt_path_t *layer_hint, circuit_t *circ, const uint8_t *cell_payload, uint16_t cell_payload_len); +int sendme_process_circuit_level_impl(crypt_path_t *, circuit_t *); int sendme_process_stream_level(edge_connection_t *conn, circuit_t *circ, uint16_t cell_body_len);

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[tor/main] TOR_VEGAS: Implement Prop#324 TOR_VEGAS.
by dgoulet＠torproject.org 30 Jul '21

30 Jul '21

commit 663cd052b553abf72ef20236f6e48d6fed1c4118 Author: Mike Perry <mikeperry-git(a)torproject.org> Date: Fri Jun 11 23:50:09 2021 +0000 TOR_VEGAS: Implement Prop#324 TOR_VEGAS. --- src/core/or/congestion_control_vegas.c | 200 +++++++++++++++++++++++++++++++++ src/core/or/congestion_control_vegas.h | 33 ++++++ 2 files changed, 233 insertions(+) diff --git a/src/core/or/congestion_control_vegas.c b/src/core/or/congestion_control_vegas.c new file mode 100644 index 0000000000..3206821f4c --- /dev/null +++ b/src/core/or/congestion_control_vegas.c @@ -0,0 +1,200 @@ +/* Copyright (c) 2019-2021, The Tor Project, Inc. */ +/* See LICENSE for licensing information */ + +/** + * \file congestion_control_vegas.c + * \brief Code that implements the TOR_VEGAS congestion control algorithm + * from Proposal #324. + */ + +#define TOR_CONGESTION_CONTROL_VEGAS_PRIVATE + +#include "core/or/or.h" + +#include "core/or/crypt_path.h" +#include "core/or/or_circuit_st.h" +#include "core/or/sendme.h" +#include "core/or/congestion_control_st.h" +#include "core/or/congestion_control_common.h" +#include "core/or/congestion_control_vegas.h" +#include "core/or/circuitlist.h" +#include "core/or/circuituse.h" +#include "core/or/origin_circuit_st.h" +#include "core/or/channel.h" +#include "feature/nodelist/networkstatus.h" + +#define VEGAS_GAMMA(cc) (6*(cc)->sendme_inc) +#define VEGAS_ALPHA(cc) (3*(cc)->sendme_inc) +#define VEGAS_BETA(cc) (6*(cc)->sendme_inc) + +#define VEGAS_BDP_MIX_PCT 0 + +/** + * The original TCP Vegas used only a congestion window BDP estimator. We + * believe that the piecewise estimator is likely to perform better, but + * for purposes of experimentation, we might as well have a way to blend + * them. It also lets us set Vegas to its original estimator while other + * algorithms on the same network use piecewise (by setting the + * 'vegas_bdp_mix_pct' consensus parameter to 100, while leaving the + * 'cc_bdp_alg' parameter set to piecewise). + * + * Returns a percentage weighted average between the CWND estimator and + * the specified consensus BDP estimator. + */ +static inline uint64_t +vegas_bdp_mix(const congestion_control_t *cc) +{ + return cc->vegas_params.bdp_mix_pct*cc->bdp[BDP_ALG_CWND_RTT]/100 + + (100-cc->vegas_params.bdp_mix_pct)*cc->bdp[cc->bdp_alg]/100; +} + +/** + * Cache Vegas consensus parameters. + */ +void +congestion_control_vegas_set_params(congestion_control_t *cc) +{ + tor_assert(cc->cc_alg == CC_ALG_VEGAS); + + cc->vegas_params.gamma = + networkstatus_get_param(NULL, "cc_vegas_gamma", + VEGAS_GAMMA(cc), + 0, + 1000); + + cc->vegas_params.alpha = + networkstatus_get_param(NULL, "cc_vegas_alpha", + VEGAS_ALPHA(cc), + 0, + 1000); + + cc->vegas_params.beta = + networkstatus_get_param(NULL, "cc_vegas_beta", + VEGAS_BETA(cc), + 0, + 1000); + + cc->vegas_params.bdp_mix_pct = + networkstatus_get_param(NULL, "cc_vegas_bdp_mix", + VEGAS_BDP_MIX_PCT, + 0, + 100); +} + +/** + * Process a SENDME and update the congestion window according to the + * rules specified in TOR_VEGAS of Proposal #324. + * + * Essentially, this algorithm attempts to measure queue lengths on + * the circuit by subtracting the bandwidth-delay-product estimate + * from the current congestion window. + * + * If the congestion window is larger than the bandwidth-delay-product, + * then data is assumed to be queuing. We reduce the congestion window + * in that case. + * + * If the congestion window is smaller than the bandwidth-delay-product, + * then there is spare bandwidth capacity on the circuit. We increase the + * congestion window in that case. + * + * The congestion window is updated only once every congestion window worth of + * packets, even if the signal persists. It is also updated whenever the + * upstream orcon blocks, or unblocks. This minimizes local client queues. + */ +int +congestion_control_vegas_process_sendme(congestion_control_t *cc, + const circuit_t *circ, + const crypt_path_t *layer_hint) +{ + uint64_t queue_use; + + tor_assert(cc && cc->cc_alg == CC_ALG_VEGAS); + tor_assert(circ); + + /* Update ack counter until next congestion signal event is allowed */ + if (cc->next_cc_event) + cc->next_cc_event--; + + /* Compute BDP and RTT. If we did not update, don't run the alg */ + if (!congestion_control_update_circuit_estimates(cc, circ, layer_hint)) { + cc->inflight = cc->inflight - cc->sendme_inc; + return 0; + } + + /* We only update anything once per window */ + if (cc->next_cc_event == 0) { + /* The queue use is the amount in which our cwnd is above BDP; + * if it is below, then 0 queue use. */ + if (vegas_bdp_mix(cc) > cc->cwnd) + queue_use = 0; + else + queue_use = cc->cwnd - vegas_bdp_mix(cc); + + if (cc->in_slow_start) { + if (queue_use < cc->vegas_params.gamma && !cc->blocked_chan) { + /* Grow to BDP immediately, then exponential growth until + * congestion signal */ + cc->cwnd = MAX(cc->cwnd + CWND_INC_SS(cc), + vegas_bdp_mix(cc)); + } else { + /* Congestion signal: Fall back to Vegas equilibrium (BDP) */ + cc->cwnd = vegas_bdp_mix(cc); + cc->in_slow_start = 0; + log_info(LD_CIRC, "CC: TOR_VEGAS exiting slow start"); + } + } else { + if (queue_use > cc->vegas_params.beta || cc->blocked_chan) { + cc->cwnd -= CWND_INC(cc); + } else if (queue_use < cc->vegas_params.alpha) { + cc->cwnd += CWND_INC(cc); + } + } + + /* cwnd can never fall below 1 increment */ + cc->cwnd = MAX(cc->cwnd, cc->cwnd_min); + + /* Schedule next update */ + cc->next_cc_event = CWND_UPDATE_RATE(cc); + + if (CIRCUIT_IS_ORIGIN(circ)) { + log_info(LD_CIRC, + "CC: TOR_VEGAS Circuit %d " + "CWND: %"PRIu64", " + "INFL: %"PRIu64", " + "VBDP: %"PRIu64", " + "QUSE: %"PRIu64", " + "NCCE: %"PRIu64", " + "SS: %d", + CONST_TO_ORIGIN_CIRCUIT(circ)->global_identifier, + cc->cwnd, + cc->inflight, + vegas_bdp_mix(cc), + queue_use, + cc->next_cc_event, + cc->in_slow_start + ); + } else { + log_info(LD_CIRC, + "CC: TOR_VEGAS Circuit %"PRIu64":%d " + "CWND: %"PRIu64", " + "INFL: %"PRIu64", " + "VBDP: %"PRIu64", " + "QUSE: %"PRIu64", " + "NCCE: %"PRIu64", " + "SS: %d", + circ->n_chan->global_identifier, circ->n_circ_id, + cc->cwnd, + cc->inflight, + vegas_bdp_mix(cc), + queue_use, + cc->next_cc_event, + cc->in_slow_start + ); + } + } + + /* Update inflight with ack */ + cc->inflight = cc->inflight - cc->sendme_inc; + + return 0; +} diff --git a/src/core/or/congestion_control_vegas.h b/src/core/or/congestion_control_vegas.h new file mode 100644 index 0000000000..111345081c --- /dev/null +++ b/src/core/or/congestion_control_vegas.h @@ -0,0 +1,33 @@ +/* Copyright (c) 2019-2021, The Tor Project, Inc. */ +/* See LICENSE for licensing information */ + +/** + * \file congestion_control_vegas.h + * \brief Private-ish APIs for the TOR_VEGAS congestion control algorithm + **/ + +#ifndef TOR_CONGESTION_CONTROL_VEGAS_H +#define TOR_CONGESTION_CONTROL_VEGAS_H + +#include "core/or/crypt_path_st.h" +#include "core/or/circuit_st.h" + +/* Processing SENDME cell. */ +int congestion_control_vegas_process_sendme(struct congestion_control_t *cc, + const circuit_t *circ, + const crypt_path_t *layer_hint); +void congestion_control_vegas_set_params(struct congestion_control_t *cc); + +/* Private section starts. */ +#ifdef TOR_CONGESTION_CONTROL_VEGAS_PRIVATE + +/* + * Unit tests declaractions. + */ +#ifdef TOR_UNIT_TESTS + +#endif /* defined(TOR_UNIT_TESTS) */ + +#endif /* defined(TOR_CONGESTION_CONTROL_VEGAS_PRIVATE) */ + +#endif /* !defined(TOR_CONGESTION_CONTROL_VEGAS_H) */

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[tor/main] MAKEFILE: include new CC algs in makefile
by dgoulet＠torproject.org 30 Jul '21

30 Jul '21

commit a0368b375958bff39a706fbbd9862765013b4207 Author: Mike Perry <mikeperry-git(a)torproject.org> Date: Fri Jun 11 23:52:06 2021 +0000 MAKEFILE: include new CC algs in makefile --- src/core/or/include.am | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/src/core/or/include.am b/src/core/or/include.am index 6d2b73d03c..d142062216 100644 --- a/src/core/or/include.am +++ b/src/core/or/include.am @@ -35,7 +35,10 @@ LIBTOR_APP_A_SOURCES += \ src/core/or/scheduler_kist.c \ src/core/or/scheduler_vanilla.c \ src/core/or/sendme.c \ - src/core/or/sendme_common.c \ + src/core/or/congestion_control_common.c \ + src/core/or/congestion_control_vegas.c \ + src/core/or/congestion_control_nola.c \ + src/core/or/congestion_control_westwood.c \ src/core/or/status.c \ src/core/or/versions.c @@ -58,6 +61,7 @@ noinst_HEADERS += \ src/core/or/circuitpadding_machines.h \ src/core/or/circuituse.h \ src/core/or/command.h \ + src/core/or/congestion_control_st.h \ src/core/or/connection_edge.h \ src/core/or/connection_or.h \ src/core/or/connection_st.h \ @@ -98,7 +102,10 @@ noinst_HEADERS += \ src/core/or/relay_crypto_st.h \ src/core/or/scheduler.h \ src/core/or/sendme.h \ - src/core/or/sendme_common.h \ + src/core/or/congestion_control_common.h \ + src/core/or/congestion_control_vegas.h \ + src/core/or/congestion_control_nola.h \ + src/core/or/congestion_control_westwood.h \ src/core/or/server_port_cfg_st.h \ src/core/or/socks_request_st.h \ src/core/or/status.h \

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[tor/main] TOR_WESTWOOD: Implement Prop#324 TOR_WESTWOOD
by dgoulet＠torproject.org 30 Jul '21

30 Jul '21

commit 33cd92922a0353111735797832e9ca3e7180eba9 Author: Mike Perry <mikeperry-git(a)torproject.org> Date: Sun Jun 13 02:20:00 2021 +0000 TOR_WESTWOOD: Implement Prop#324 TOR_WESTWOOD --- src/core/or/congestion_control_westwood.c | 231 ++++++++++++++++++++++++++++++ src/core/or/congestion_control_westwood.h | 33 +++++ 2 files changed, 264 insertions(+) diff --git a/src/core/or/congestion_control_westwood.c b/src/core/or/congestion_control_westwood.c new file mode 100644 index 0000000000..4b24234212 --- /dev/null +++ b/src/core/or/congestion_control_westwood.c @@ -0,0 +1,231 @@ +/* Copyright (c) 2019-2021, The Tor Project, Inc. */ +/* See LICENSE for licensing information */ + +/** + * \file congestion_control_westwood.c + * \brief Code that implements the TOR_WESTWOOD congestion control algorithm + * from Proposal #324. + */ + +#define TOR_CONGESTION_CONTROL_WESTWOOD_PRIVATE + +#include "core/or/or.h" + +#include "core/or/crypt_path.h" +#include "core/or/or_circuit_st.h" +#include "core/or/sendme.h" +#include "core/or/congestion_control_st.h" +#include "core/or/congestion_control_common.h" +#include "core/or/congestion_control_westwood.h" +#include "core/or/circuitlist.h" +#include "core/or/circuituse.h" +#include "core/or/origin_circuit_st.h" +#include "core/or/channel.h" +#include "feature/nodelist/networkstatus.h" + +#define USEC_ONE_MS (1000) + +#define WESTWOOD_CWND_BACKOFF_M 75 +#define WESTWOOD_RTT_BACKOFF_M 100 +#define WESTWOOD_RTT_THRESH 33 +#define WESTWOOD_MIN_BACKOFF 0 + +/** + * Cache westwood consensus parameters. + */ +void +congestion_control_westwood_set_params(congestion_control_t *cc) +{ + tor_assert(cc->cc_alg == CC_ALG_WESTWOOD); + + cc->westwood_params.cwnd_backoff_m = + networkstatus_get_param(NULL, "cc_westwood_cwnd_m", + WESTWOOD_CWND_BACKOFF_M, + 0, + 100); + + cc->westwood_params.rtt_backoff_m = + networkstatus_get_param(NULL, "cc_westwood_rtt_m", + WESTWOOD_RTT_BACKOFF_M, + 50, + 100); + + cc->westwood_params.rtt_thresh = + networkstatus_get_param(NULL, "cc_westwood_rtt_thresh", + WESTWOOD_RTT_THRESH, + 0, + 100); + + cc->westwood_params.min_backoff = + networkstatus_get_param(NULL, "cc_westwood_min_backoff", + WESTWOOD_MIN_BACKOFF, + 0, + 1); +} + +/** + * Return the RTT threshhold that signals congestion. + * + * Computed from the threshold parameter that specifies a + * percent between the min and max RTT obseved so far. + */ +static inline uint64_t +westwood_rtt_signal(const congestion_control_t *cc) +{ + return ((100 - cc->westwood_params.rtt_thresh)*cc->min_rtt_usec + + cc->westwood_params.rtt_thresh*(cc)->max_rtt_usec)/100; +} + +/** + * Compute a backoff to reduce the max RTT. + * + * This may be necessary to ensure that westwood does not have + * a runaway condition where congestion inflates the max RTT, which + * inflates the congestion threshold. That cannot happen with one + * Westwood instance, but it may happen in aggregate. Hence, this is + * a safety parameter, in case we need it. + */ +static inline uint64_t +westwood_rtt_max_backoff(const congestion_control_t *cc) +{ + return cc->min_rtt_usec + + (cc->westwood_params.rtt_backoff_m * + (cc->max_rtt_usec - cc->min_rtt_usec))/100; +} + +/** + * Returns true if the circuit is experiencing congestion, as per + * TOR_WESTWOOD rules. + */ +static inline bool +westwood_is_congested(const congestion_control_t *cc) +{ + /* If the local channel is blocked, that is always congestion */ + if (cc->blocked_chan) + return true; + + /* If the min RTT is within 1ms of the signal, then there is not enough + * range in RTTs to signify congestion. Treat that as not congested. */ + if (westwood_rtt_signal(cc) < cc->min_rtt_usec || + westwood_rtt_signal(cc) - cc->min_rtt_usec < USEC_ONE_MS) + return false; + + /* If the EWMA-smoothed RTT exceeds the westwood RTT threshhold, + * then it is congestion. */ + if (cc->ewma_rtt_usec > westwood_rtt_signal(cc)) + return true; + + return false; +} + +/** + * Process a SENDME and update the congestion window according to the + * rules specified in TOR_WESTWOOD of Proposal #324. + * + * Essentially, this algorithm uses a threshhold of 'rtt_thresh', which + * is a midpoint between the min and max RTT. If the RTT exceeds this + * threshhold, then queue delay due to congestion is assumed to be present, + * and the algirithm reduces the congestion window. If the RTT is below the + * threshhold, the circuit is not congested (ie: queue delay is low), and we + * increase the congestion window. + * + * The congestion window is updated only once every congestion window worth of + * packets, even if the signal persists. It is also updated whenever the + * upstream orcon blocks, or unblocks. This minimizes local client queues. + */ +int +congestion_control_westwood_process_sendme(congestion_control_t *cc, + const circuit_t *circ, + const crypt_path_t *layer_hint) +{ + tor_assert(cc && cc->cc_alg == CC_ALG_WESTWOOD); + tor_assert(circ); + + /* Update ack counter until next congestion signal event is allowed */ + if (cc->next_cc_event) + cc->next_cc_event--; + + /* If we were unable to update our circuit estimates, Westwood must + * *not* update its cwnd, otherwise it could run to infinity, or to 0. + * Just update inflight from the sendme and return. */ + if (!congestion_control_update_circuit_estimates(cc, circ, layer_hint)) { + cc->inflight = cc->inflight - cc->sendme_inc; + return 0; + } + + /* We only update anything once per window */ + if (cc->next_cc_event == 0) { + if (!westwood_is_congested(cc)) { + if (cc->in_slow_start) { + cc->cwnd = MAX(cc->cwnd + CWND_INC_SS(cc), + cc->bdp[cc->bdp_alg]); + } else { + cc->cwnd = cc->cwnd + CWND_INC(cc); + } + } else { + if (cc->westwood_params.min_backoff) + cc->cwnd = MIN(cc->cwnd*cc->westwood_params.cwnd_backoff_m/100, + cc->bdp[cc->bdp_alg]); + else + cc->cwnd = MAX(cc->cwnd*cc->westwood_params.cwnd_backoff_m/100, + cc->bdp[cc->bdp_alg]); + + cc->in_slow_start = 0; + + // Because Westwood's congestion can runaway and boost max rtt, + // which increases its congestion signal, we backoff the max rtt + // too. + cc->max_rtt_usec = westwood_rtt_max_backoff(cc); + + log_info(LD_CIRC, "CC: TOR_WESTWOOD congestion. New max RTT: %"PRIu64, + cc->max_rtt_usec/1000); + } + + /* cwnd can never fall below 1 increment */ + cc->cwnd = MAX(cc->cwnd, cc->cwnd_min); + + /* Schedule next update */ + cc->next_cc_event = CWND_UPDATE_RATE(cc); + + if (CIRCUIT_IS_ORIGIN(circ)) { + log_info(LD_CIRC, + "CC: TOR_WESTWOOD Circuit %d " + "CWND: %"PRIu64", " + "INFL: %"PRIu64", " + "NCCE: %"PRIu64", " + "WRTT: %"PRIu64", " + "WSIG: %"PRIu64", " + "SS: %d", + CONST_TO_ORIGIN_CIRCUIT(circ)->global_identifier, + cc->cwnd, + cc->inflight, + cc->next_cc_event, + cc->ewma_rtt_usec/1000, + westwood_rtt_signal(cc)/1000, + cc->in_slow_start + ); + } else { + log_info(LD_CIRC, + "CC: TOR_WESTWOOD Circuit %"PRIu64":%d " + "CWND: %"PRIu64", " + "INFL: %"PRIu64", " + "NCCE: %"PRIu64", " + "WRTT: %"PRIu64", " + "WSIG: %"PRIu64", " + "SS: %d", + circ->n_chan->global_identifier, circ->n_circ_id, + cc->cwnd, + cc->inflight, + cc->next_cc_event, + cc->ewma_rtt_usec/1000, + westwood_rtt_signal(cc)/1000, + cc->in_slow_start + ); + } + } + + /* Update inflight with ack */ + cc->inflight = cc->inflight - cc->sendme_inc; + + return 0; +} diff --git a/src/core/or/congestion_control_westwood.h b/src/core/or/congestion_control_westwood.h new file mode 100644 index 0000000000..c6fd596df4 --- /dev/null +++ b/src/core/or/congestion_control_westwood.h @@ -0,0 +1,33 @@ +/* Copyright (c) 2019-2021, The Tor Project, Inc. */ +/* See LICENSE for licensing information */ + +/** + * \file congestion_control_westwood.h + * \brief Private-ish APIs for the TOR_WESTWOOD congestion control algorithm + **/ + +#ifndef TOR_CONGESTION_CONTROL_WESTWOOD_H +#define TOR_CONGESTION_CONTROL_WESTWOOD_H + +#include "core/or/crypt_path_st.h" +#include "core/or/circuit_st.h" + +/* Processing SENDME cell. */ +int congestion_control_westwood_process_sendme(struct congestion_control_t *cc, + const circuit_t *circ, + const crypt_path_t *layer_hint); +void congestion_control_westwood_set_params(struct congestion_control_t *cc); + +/* Private section starts. */ +#ifdef TOR_CONGESTION_CONTROL_WESTWOOD_PRIVATE + +/* + * Unit tests declaractions. + */ +#ifdef TOR_UNIT_TESTS + +#endif /* defined(TOR_UNIT_TESTS) */ + +#endif /* defined(TOR_CONGESTION_CONTROL_WESTWOOD_PRIVATE) */ + +#endif /* !defined(TOR_CONGESTION_CONTROL_WESTWOOD_H) */

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[tor/main] TOR_NOLA: Implement a pure BDP tracking CC alg
by dgoulet＠torproject.org 30 Jul '21

30 Jul '21

commit ed1e91ffc29a707443d89e0f06732d8bab656c33 Author: Mike Perry <mikeperry-git(a)torproject.org> Date: Fri Jun 11 23:50:37 2021 +0000 TOR_NOLA: Implement a pure BDP tracking CC alg How come no one ever named a congestion control algorithm after New Orleans? --- src/core/or/congestion_control_nola.c | 126 ++++++++++++++++++++++++++++++++++ src/core/or/congestion_control_nola.h | 33 +++++++++ 2 files changed, 159 insertions(+) diff --git a/src/core/or/congestion_control_nola.c b/src/core/or/congestion_control_nola.c new file mode 100644 index 0000000000..09f88d4699 --- /dev/null +++ b/src/core/or/congestion_control_nola.c @@ -0,0 +1,126 @@ +/* Copyright (c) 2019-2021, The Tor Project, Inc. */ +/* See LICENSE for licensing information */ + +/** + * \file congestion_control_nola.c + * \brief Code that implements the TOR_NOLA congestion control algorithm + * from Proposal #324. + */ + +#define TOR_CONGESTION_CONTROL_NOLA_PRIVATE + +#include "core/or/or.h" + +#include "core/or/crypt_path.h" +#include "core/or/or_circuit_st.h" +#include "core/or/sendme.h" +#include "core/or/congestion_control_st.h" +#include "core/or/congestion_control_common.h" +#include "core/or/congestion_control_nola.h" +#include "core/or/circuituse.h" +#include "core/or/circuitlist.h" +#include "core/or/origin_circuit_st.h" +#include "core/or/channel.h" +#include "feature/nodelist/networkstatus.h" + +#define NOLA_BDP_OVERSHOOT 100 + +/** + * Cache NOLA consensus parameters. + */ +void +congestion_control_nola_set_params(congestion_control_t *cc) +{ + tor_assert(cc->cc_alg == CC_ALG_NOLA); + + cc->nola_params.bdp_overshoot = + networkstatus_get_param(NULL, "cc_nola_overshoot", + NOLA_BDP_OVERSHOOT, + 0, + 1000); +} + +/** +* Process a SENDME and update the congestion window according to the +* rules specified in TOR_NOLA of Proposal #324. +* +* TOR_NOLA updates the congestion window to match the current +* BDP estimate, every sendme. Because this can result in downward +* drift, a fixed overhead is added to the BDP estimate. This will +* cause some queuing, but ensures that the algorithm always uses +* the full BDP. +* +* To handle the case where the local orconn blocks, TOR_NOLA uses +* the 'piecewise' BDP estimate, which uses more a conservative BDP +* estimate method when blocking occurrs, but a more aggressive BDP +* estimate when there is no local blocking. This minimizes local +* client queues. +*/ +int +congestion_control_nola_process_sendme(congestion_control_t *cc, + const circuit_t *circ, + const crypt_path_t *layer_hint) +{ + tor_assert(cc && cc->cc_alg == CC_ALG_NOLA); + tor_assert(circ); + + if (cc->next_cc_event) + cc->next_cc_event--; + + /* If we get a congestion event, the only thing NOLA + * does is note this as if we exited slow-start + * (which for NOLA just means we finished our ICW). */ + if (cc->next_cc_event == 0) + cc->in_slow_start = 0; + + /* If we did not successfully update BDP, we must return. Otherwise, + * NOLA can drift downwards */ + if (!congestion_control_update_circuit_estimates(cc, circ, layer_hint)) { + cc->inflight = cc->inflight - cc->sendme_inc; + return 0; + } + + /* We overshoot the BDP by the cwnd_inc param amount, because BDP + * may otherwise drift down. This helps us probe for more capacity. + * But there is no sense to do it if the local channel is blocked. */ + if (cc->blocked_chan) + cc->cwnd = cc->bdp[cc->bdp_alg]; + else + cc->cwnd = cc->bdp[cc->bdp_alg] + cc->nola_params.bdp_overshoot; + + /* cwnd can never fall below 1 increment */ + cc->cwnd = MAX(cc->cwnd, cc->cwnd_min); + + if (CIRCUIT_IS_ORIGIN(circ)) { + log_info(LD_CIRC, + "CC TOR_NOLA: Circuit %d " + "CWND: %"PRIu64", " + "INFL: %"PRIu64", " + "NCCE: %"PRIu64", " + "SS: %d", + CONST_TO_ORIGIN_CIRCUIT(circ)->global_identifier, + cc->cwnd, + cc->inflight, + cc->next_cc_event, + cc->in_slow_start + ); + } else { + log_info(LD_CIRC, + "CC TOR_NOLA: Circuit %"PRIu64":%d " + "CWND: %"PRIu64", " + "INFL: %"PRIu64", " + "NCCE: %"PRIu64", " + "SS: %d", + circ->n_chan->global_identifier, circ->n_circ_id, + cc->cwnd, + cc->inflight, + cc->next_cc_event, + cc->in_slow_start + ); + } + + /* Update inflight with ack */ + cc->inflight = cc->inflight - cc->sendme_inc; + + return 0; +} diff --git a/src/core/or/congestion_control_nola.h b/src/core/or/congestion_control_nola.h new file mode 100644 index 0000000000..9c7d6e0635 --- /dev/null +++ b/src/core/or/congestion_control_nola.h @@ -0,0 +1,33 @@ +/* Copyright (c) 2019-2021, The Tor Project, Inc. */ +/* See LICENSE for licensing information */ + +/** + * \file congestion_control_nola.h + * \brief Private-ish APIs for the TOR_NOLA congestion control algorithm + **/ + +#ifndef TOR_CONGESTION_CONTROL_NOLA_H +#define TOR_CONGESTION_CONTROL_NOLA_H + +#include "core/or/crypt_path_st.h" +#include "core/or/circuit_st.h" + +/* Processing SENDME cell. */ +int congestion_control_nola_process_sendme(struct congestion_control_t *cc, + const circuit_t *circ, + const crypt_path_t *layer_hint); +void congestion_control_nola_set_params(struct congestion_control_t *cc); + +/* Private section starts. */ +#ifdef TOR_CONGESTION_CONTROL_NOLA_PRIVATE + +/* + * Unit tests declaractions. + */ +#ifdef TOR_UNIT_TESTS + +#endif /* defined(TOR_UNIT_TESTS) */ + +#endif /* defined(TOR_CONGESTION_CONTROL_NOLA_PRIVATE) */ + +#endif /* !defined(TOR_CONGESTION_CONTROL_NOLA_H) */

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[tor/main] Make inbuf and outbuf len check params const
by dgoulet＠torproject.org 30 Jul '21

30 Jul '21

commit 5c3021be8536e2b41d1ecff88e201333a51216b7 Author: Mike Perry <mikeperry-git(a)torproject.org> Date: Tue Jul 20 18:30:23 2021 +0000 Make inbuf and outbuf len check params const --- src/core/mainloop/connection.c | 4 ++-- src/core/mainloop/connection.h | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/src/core/mainloop/connection.c b/src/core/mainloop/connection.c index 92755914ec..79e034fb34 100644 --- a/src/core/mainloop/connection.c +++ b/src/core/mainloop/connection.c @@ -250,13 +250,13 @@ CONST_TO_LISTENER_CONN(const connection_t *c) } size_t -connection_get_inbuf_len(connection_t *conn) +connection_get_inbuf_len(const connection_t *conn) { return conn->inbuf ? buf_datalen(conn->inbuf) : 0; } size_t -connection_get_outbuf_len(connection_t *conn) +connection_get_outbuf_len(const connection_t *conn) { return conn->outbuf ? buf_datalen(conn->outbuf) : 0; } diff --git a/src/core/mainloop/connection.h b/src/core/mainloop/connection.h index 36c94d6570..8b378b15a4 100644 --- a/src/core/mainloop/connection.h +++ b/src/core/mainloop/connection.h @@ -274,8 +274,8 @@ void connection_buf_add_compress(const char *string, size_t len, struct dir_connection_t *conn, int done); void connection_buf_add_buf(struct connection_t *conn, struct buf_t *buf); -size_t connection_get_inbuf_len(struct connection_t *conn); -size_t connection_get_outbuf_len(struct connection_t *conn); +size_t connection_get_inbuf_len(const struct connection_t *conn); +size_t connection_get_outbuf_len(const struct connection_t *conn); struct connection_t *connection_get_by_global_id(uint64_t id); struct connection_t *connection_get_by_type(int type);

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[translation/communitytpo-contentspot] https://gitweb.torproject.org/translation.git/commit/?h=communitytpo-contentspot
by translation＠torproject.org 30 Jul '21

30 Jul '21

commit 38212b5a8773c98e9328491f2c80e7439e3992ef Author: Translation commit bot <translation(a)torproject.org> Date: Fri Jul 30 15:15:12 2021 +0000 https://gitweb.torproject.org/translation.git/commit/?h=communitytpo-conten… --- contents+pl.po | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/contents+pl.po b/contents+pl.po index ba2777c03c..d7b003a00e 100644 --- a/contents+pl.po +++ b/contents+pl.po @@ -11554,7 +11554,7 @@ msgstr "" #: https//community.torproject.org/relay/community-resources/good-bad-isps/ #: (content/relay/community-resources/good-bad-isps/contents+en.lrpage.body) msgid "### Hungary" -msgstr "" +msgstr "### Węgry" #: https//community.torproject.org/relay/community-resources/good-bad-isps/ #: (content/relay/community-resources/good-bad-isps/contents+en.lrpage.body) @@ -11564,6 +11564,11 @@ msgid "" "e-mail that exit nodes are acceptable, with \"strict\" exit node policies. |" " 2014-10-15 |" msgstr "" +"| [ServerAstra](https://serverastra.com/) | AS56322 | Tak | Tak | Tak | " +"Mówią tylko, że powinieneś odpowiadać na prośby o nadużycie w ciągu 24 " +"godzin. Dostawca usług internetowych ponownie potwierdził e-mailem, że węzły" +" wyjściowe są dopuszczalne ze „ścisłą” polityką węzłów wyjściowych. | " +"2014-10-15 |" #: https//community.torproject.org/relay/community-resources/good-bad-isps/ #: (content/relay/community-resources/good-bad-isps/contents+en.lrpage.body) @@ -18814,25 +18819,27 @@ msgstr "" #: templates/outreach.html:36 msgid "Upcoming Tor Events" -msgstr "" +msgstr "Nadchodzące wydarzenia Tor" #: templates/project.html:40 msgid "Back to " -msgstr "" +msgstr "Powrót do" #: templates/relay-operations.html:23 msgid "Connect with other Relay Operators" -msgstr "" +msgstr "Połącz się z innymi operatorami przekaźników" #: templates/relay-operations.html:24 msgid "" "The best resource of all is the active community of relay operators on tor-" "relays mailing list and on IRC" msgstr "" +"Najlepszym źródłem informacji jest aktywna społeczność operatorów " +"przekaźników na liście dyskusyjnej tor-relays i na IRC" #: templates/relay-operations.html:24 msgid "#tor-relays" -msgstr "" +msgstr "#tor-relays" #: templates/relay-operations.html:24 msgid "in irc.oftc.net."

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[tpo/master] Update Apple OS name from OS X to macOS
by gus＠torproject.org 30 Jul '21

30 Jul '21

commit 38a7cc96f39bad820d83169aa8bba71828f3a611 Author: HackerNCoder <hackerncoder(a)encryptionin.space> Date: Thu Jul 29 23:00:03 2021 +0000 Update Apple OS name from OS X to macOS --- databags/platforms.ini | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/databags/platforms.ini b/databags/platforms.ini index 7d0efbe3..a72c437f 100644 --- a/databags/platforms.ini +++ b/databags/platforms.ini @@ -4,7 +4,7 @@ label = Windows [apple] path = osx -label = OS X +label = macOS [linux] path = linux

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