71 lines
2.2 KiB
C
71 lines
2.2 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) 2007-2017, The Tor Project, Inc. */
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/* See LICENSE for licensing information */
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/**
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* \file dns.h
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* \brief Header file for dns.c.
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**/
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#ifndef TOR_DNS_H
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#define TOR_DNS_H
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/** Lowest value for DNS ttl that a server will give. */
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#define MIN_DNS_TTL_AT_EXIT (5*60)
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/** Highest value for DNS ttl that a server will give. */
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#define MAX_DNS_TTL_AT_EXIT (60*60)
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/** How long do we keep DNS cache entries before purging them (regardless of
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* their TTL)? */
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#define MAX_DNS_ENTRY_AGE (3*60*60)
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/** How long do we cache/tell clients to cache DNS records when no TTL is
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* known? */
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#define DEFAULT_DNS_TTL (30*60)
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int dns_init(void);
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int has_dns_init_failed(void);
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void dns_free_all(void);
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uint32_t dns_clip_ttl(uint32_t ttl);
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int dns_reset(void);
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void connection_dns_remove(edge_connection_t *conn);
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void assert_connection_edge_not_dns_pending(edge_connection_t *conn);
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void assert_all_pending_dns_resolves_ok(void);
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MOCK_DECL(void,dns_cancel_pending_resolve,(const char *question));
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int dns_resolve(edge_connection_t *exitconn);
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void dns_launch_correctness_checks(void);
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int dns_seems_to_be_broken(void);
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int dns_seems_to_be_broken_for_ipv6(void);
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void dns_reset_correctness_checks(void);
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void dump_dns_mem_usage(int severity);
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#ifdef DNS_PRIVATE
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#include "dns_structs.h"
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MOCK_DECL(STATIC int,dns_resolve_impl,(edge_connection_t *exitconn,
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int is_resolve,or_circuit_t *oncirc, char **hostname_out,
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int *made_connection_pending_out, cached_resolve_t **resolve_out));
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MOCK_DECL(STATIC void,send_resolved_cell,(edge_connection_t *conn,
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uint8_t answer_type,const cached_resolve_t *resolved));
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MOCK_DECL(STATIC void,send_resolved_hostname_cell,(edge_connection_t *conn,
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const char *hostname));
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cached_resolve_t *dns_get_cache_entry(cached_resolve_t *query);
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void dns_insert_cache_entry(cached_resolve_t *new_entry);
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MOCK_DECL(STATIC int,
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set_exitconn_info_from_resolve,(edge_connection_t *exitconn,
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const cached_resolve_t *resolve,
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char **hostname_out));
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MOCK_DECL(STATIC int,
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launch_resolve,(cached_resolve_t *resolve));
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#endif
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#endif
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