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103 lines
3.9 KiB
C
103 lines
3.9 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) 2007-2018, The Tor Project, Inc. */
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/* See LICENSE for licensing information */
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#ifndef NODE_ST_H
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#define NODE_ST_H
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#include "or/hsdir_index_st.h"
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/** A node_t represents a Tor router.
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*
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* Specifically, a node_t is a Tor router as we are using it: a router that
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* we are considering for circuits, connections, and so on. A node_t is a
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* thin wrapper around the routerstatus, routerinfo, and microdesc for a
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* single router, and provides a consistent interface for all of them.
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*
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* Also, a node_t has mutable state. While a routerinfo, a routerstatus,
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* and a microdesc have[*] only the information read from a router
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* descriptor, a consensus entry, and a microdescriptor (respectively)...
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* a node_t has flags based on *our own current opinion* of the node.
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*
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* [*] Actually, there is some leftover information in each that is mutable.
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* We should try to excise that.
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*/
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struct node_t {
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/* Indexing information */
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/** Used to look up the node_t by its identity digest. */
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HT_ENTRY(node_t) ht_ent;
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/** Used to look up the node_t by its ed25519 identity digest. */
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HT_ENTRY(node_t) ed_ht_ent;
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/** Position of the node within the list of nodes */
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int nodelist_idx;
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/** The identity digest of this node_t. No more than one node_t per
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* identity may exist at a time. */
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char identity[DIGEST_LEN];
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/** The ed25519 identity of this node_t. This field is nonzero iff we
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* currently have an ed25519 identity for this node in either md or ri,
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* _and_ this node has been inserted to the ed25519-to-node map in the
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* nodelist.
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*/
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ed25519_public_key_t ed25519_id;
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microdesc_t *md;
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routerinfo_t *ri;
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routerstatus_t *rs;
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/* local info: copied from routerstatus, then possibly frobbed based
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* on experience. Authorities set this stuff directly. Note that
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* these reflect knowledge of the primary (IPv4) OR port only. */
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unsigned int is_running:1; /**< As far as we know, is this OR currently
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* running? */
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unsigned int is_valid:1; /**< Has a trusted dirserver validated this OR?
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* (For Authdir: Have we validated this OR?) */
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unsigned int is_fast:1; /** Do we think this is a fast OR? */
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unsigned int is_stable:1; /** Do we think this is a stable OR? */
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unsigned int is_possible_guard:1; /**< Do we think this is an OK guard? */
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unsigned int is_exit:1; /**< Do we think this is an OK exit? */
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unsigned int is_bad_exit:1; /**< Do we think this exit is censored, borked,
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* or otherwise nasty? */
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unsigned int is_hs_dir:1; /**< True iff this router is a hidden service
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* directory according to the authorities. */
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/* Local info: warning state. */
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unsigned int name_lookup_warned:1; /**< Have we warned the user for referring
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* to this (unnamed) router by nickname?
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*/
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/** Local info: we treat this node as if it rejects everything */
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unsigned int rejects_all:1;
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/* Local info: derived. */
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/** True if the IPv6 OR port is preferred over the IPv4 OR port.
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* XX/teor - can this become out of date if the torrc changes? */
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unsigned int ipv6_preferred:1;
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/** According to the geoip db what country is this router in? */
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/* XXXprop186 what is this suppose to mean with multiple OR ports? */
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country_t country;
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/* The below items are used only by authdirservers for
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* reachability testing. */
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/** When was the last time we could reach this OR? */
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time_t last_reachable; /* IPv4. */
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time_t last_reachable6; /* IPv6. */
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/* Hidden service directory index data. This is used by a service or client
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* in order to know what's the hs directory index for this node at the time
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* the consensus is set. */
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struct hsdir_index_t hsdir_index;
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};
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#endif
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