186 lines
7.7 KiB
C
186 lines
7.7 KiB
C
/* Copyright (c) 2001 Matej Pfajfar.
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* Copyright (c) 2001-2004, Roger Dingledine.
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* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
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* Copyright (c) 2007-2016, The Tor Project, Inc. */
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/* See LICENSE for licensing information */
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/**
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* \file dirvote.h
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* \brief Header file for dirvote.c.
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**/
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#ifndef TOR_DIRVOTE_H
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#define TOR_DIRVOTE_H
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#include "testsupport.h"
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/*
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* Ideally, assuming synced clocks, we should only need 1 second for each of:
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* - Vote
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* - Distribute
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* - Consensus Publication
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* As we can gather descriptors continuously.
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* (Could we even go as far as publishing the previous consensus,
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* in the same second that we vote for the next one?)
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* But we're not there yet: these are the lowest working values at this time.
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*/
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/** Lowest allowable value for VoteSeconds. */
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#define MIN_VOTE_SECONDS 2
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/** Lowest allowable value for VoteSeconds when TestingTorNetwork is 1 */
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#define MIN_VOTE_SECONDS_TESTING 2
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/** Lowest allowable value for DistSeconds. */
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#define MIN_DIST_SECONDS 2
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/** Lowest allowable value for DistSeconds when TestingTorNetwork is 1 */
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#define MIN_DIST_SECONDS_TESTING 2
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/** Lowest allowable voting interval. */
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#define MIN_VOTE_INTERVAL 300
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/** Lowest allowable voting interval when TestingTorNetwork is 1:
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* Voting Interval can be:
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* 10, 12, 15, 18, 20, 24, 25, 30, 36, 40, 45, 50, 60, ...
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* Testing Initial Voting Interval can be:
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* 5, 6, 8, 9, or any of the possible values for Voting Interval,
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* as they both need to evenly divide 30 minutes.
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* If clock desynchronisation is an issue, use an interval of at least:
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* 18 * drift in seconds, to allow for a clock slop factor */
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#define MIN_VOTE_INTERVAL_TESTING \
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(((MIN_VOTE_SECONDS_TESTING)+(MIN_DIST_SECONDS_TESTING)+1)*2)
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#define MIN_VOTE_INTERVAL_TESTING_INITIAL \
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((MIN_VOTE_SECONDS_TESTING)+(MIN_DIST_SECONDS_TESTING)+1)
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/** The lowest consensus method that we currently support. */
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#define MIN_SUPPORTED_CONSENSUS_METHOD 13
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/** The highest consensus method that we currently support. */
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#define MAX_SUPPORTED_CONSENSUS_METHOD 22
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/** Lowest consensus method where microdesc consensuses omit any entry
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* with no microdesc. */
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#define MIN_METHOD_FOR_MANDATORY_MICRODESC 13
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/** Lowest consensus method that contains "a" lines. */
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#define MIN_METHOD_FOR_A_LINES 14
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/** Lowest consensus method where microdescs may include a "p6" line. */
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#define MIN_METHOD_FOR_P6_LINES 15
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/** Lowest consensus method where microdescs may include an onion-key-ntor
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* line */
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#define MIN_METHOD_FOR_NTOR_KEY 16
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/** Lowest consensus method that ensures that authorities output an
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* Unmeasured=1 flag for unmeasured bandwidths */
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#define MIN_METHOD_TO_CLIP_UNMEASURED_BW 17
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/** Lowest consensus method where authorities may include an "id" line in
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* microdescriptors. */
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#define MIN_METHOD_FOR_ID_HASH_IN_MD 18
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/** Lowest consensus method where we include "package" lines*/
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#define MIN_METHOD_FOR_PACKAGE_LINES 19
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/** Lowest consensus method where authorities may include
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* GuardFraction information in microdescriptors. */
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#define MIN_METHOD_FOR_GUARDFRACTION 20
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/** Lowest consensus method where authorities may include an "id" line for
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* ed25519 identities in microdescriptors. (Broken; see
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* consensus_method_is_supported() for more info.) */
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#define MIN_METHOD_FOR_ED25519_ID_IN_MD 21
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/** Lowest consensus method where authorities vote on ed25519 ids and ensure
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* ed25519 id consistency. */
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#define MIN_METHOD_FOR_ED25519_ID_VOTING 22
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/** Default bandwidth to clip unmeasured bandwidths to using method >=
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* MIN_METHOD_TO_CLIP_UNMEASURED_BW. (This is not a consensus method; do not
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* get confused with the above macros.) */
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#define DEFAULT_MAX_UNMEASURED_BW_KB 20
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void dirvote_free_all(void);
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/* vote manipulation */
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char *networkstatus_compute_consensus(smartlist_t *votes,
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int total_authorities,
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crypto_pk_t *identity_key,
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crypto_pk_t *signing_key,
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const char *legacy_identity_key_digest,
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crypto_pk_t *legacy_signing_key,
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consensus_flavor_t flavor);
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int networkstatus_add_detached_signatures(networkstatus_t *target,
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ns_detached_signatures_t *sigs,
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const char *source,
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int severity,
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const char **msg_out);
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char *networkstatus_get_detached_signatures(smartlist_t *consensuses);
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void ns_detached_signatures_free(ns_detached_signatures_t *s);
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/* cert manipulation */
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authority_cert_t *authority_cert_dup(authority_cert_t *cert);
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/* vote scheduling */
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void dirvote_get_preferred_voting_intervals(vote_timing_t *timing_out);
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time_t dirvote_get_start_of_next_interval(time_t now,
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int interval,
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int offset);
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void dirvote_recalculate_timing(const or_options_t *options, time_t now);
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void dirvote_act(const or_options_t *options, time_t now);
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/* invoked on timers and by outside triggers. */
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struct pending_vote_t * dirvote_add_vote(const char *vote_body,
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const char **msg_out,
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int *status_out);
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int dirvote_add_signatures(const char *detached_signatures_body,
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const char *source,
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const char **msg_out);
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/* Item access */
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MOCK_DECL(const char*, dirvote_get_pending_consensus,
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(consensus_flavor_t flav));
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MOCK_DECL(const char*, dirvote_get_pending_detached_signatures, (void));
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#define DGV_BY_ID 1
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#define DGV_INCLUDE_PENDING 2
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#define DGV_INCLUDE_PREVIOUS 4
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const cached_dir_t *dirvote_get_vote(const char *fp, int flags);
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void set_routerstatus_from_routerinfo(routerstatus_t *rs,
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node_t *node,
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routerinfo_t *ri, time_t now,
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int listbadexits);
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networkstatus_t *
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dirserv_generate_networkstatus_vote_obj(crypto_pk_t *private_key,
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authority_cert_t *cert);
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microdesc_t *dirvote_create_microdescriptor(const routerinfo_t *ri,
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int consensus_method);
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ssize_t dirvote_format_microdesc_vote_line(char *out, size_t out_len,
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const microdesc_t *md,
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int consensus_method_low,
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int consensus_method_high);
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vote_microdesc_hash_t *dirvote_format_all_microdesc_vote_lines(
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const routerinfo_t *ri,
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time_t now,
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smartlist_t *microdescriptors_out);
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int vote_routerstatus_find_microdesc_hash(char *digest256_out,
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const vote_routerstatus_t *vrs,
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int method,
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digest_algorithm_t alg);
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document_signature_t *voter_get_sig_by_algorithm(
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const networkstatus_voter_info_t *voter,
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digest_algorithm_t alg);
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#ifdef DIRVOTE_PRIVATE
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STATIC char *format_networkstatus_vote(crypto_pk_t *private_key,
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networkstatus_t *v3_ns);
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STATIC char *dirvote_compute_params(smartlist_t *votes, int method,
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int total_authorities);
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STATIC char *compute_consensus_package_lines(smartlist_t *votes);
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STATIC char *make_consensus_method_list(int low, int high, const char *sep);
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#endif
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#endif
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