103 lines
3.3 KiB
C
103 lines
3.3 KiB
C
/* Copyright (C) CZ.NIC, z.s.p.o. <knot-resolver@labs.nic.cz>
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* SPDX-License-Identifier: GPL-3.0-or-later
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*/
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#pragma once
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#include <errno.h>
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#include <libknot/errcode.h>
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#include <libknot/dname.h>
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#include <libknot/rrset.h>
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#include <libknot/version.h>
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/* Function attributes */
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#if __GNUC__ >= 4
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#define KR_EXPORT __attribute__ ((visibility ("default")))
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#define KR_CONST __attribute__((__const__))
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#define KR_PURE __attribute__((__pure__))
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#define KR_NORETURN __attribute__((__noreturn__))
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#define KR_COLD __attribute__((__cold__))
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#define KR_PRINTF(n) __attribute__((format (printf, n, (n+1))))
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#else
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#define KR_EXPORT
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#define KR_CONST
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#define KR_PURE
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#define KR_NORETURN
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#define KR_COLD
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#define KR_PRINTF(n)
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#endif
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typedef unsigned int uint;
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/*
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* Error codes.
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*/
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#define kr_ok() 0
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/* Mark as cold to mark all branches as unlikely. */
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static inline int KR_COLD kr_error(int x) {
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return x <= 0 ? x : -x;
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}
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#define kr_strerror(x) strerror(abs(x))
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/* We require C11 but want to avoid including the standard assertion header
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* so we alias it ourselves. */
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#define static_assert _Static_assert
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/*
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* Connection limits.
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* @cond internal
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*/
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#define KR_CONN_RTT_MAX 2000 /* Timeout for network activity */
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#define KR_CONN_RETRY 200 /* Retry interval for network activity */
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#define KR_ITER_LIMIT 100 /* Built-in iterator limit */
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#define KR_RESOLVE_TIME_LIMIT 10000 /* Upper limit for resolution time of single query, ms */
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#define KR_CNAME_CHAIN_LIMIT 13 /* Built-in maximum CNAME chain length */
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#define KR_TIMEOUT_LIMIT 10 /* Maximum number of retries after timeout. */
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#define KR_QUERY_NSRETRY_LIMIT 4 /* Maximum number of retries per query. */
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#define KR_COUNT_NO_NSADDR_LIMIT 5
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#define KR_CONSUME_FAIL_ROW_LIMIT 3 /* Maximum number of KR_STATE_FAIL in a row. */
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#define KR_VLD_LIMIT_CRYPTO_DEFAULT 32 /**< default for struct kr_query::vld_limit_crypto */
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/*
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* Defines.
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*/
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#define KR_DNS_PORT 53
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#define KR_DNS_DOH_PORT 443
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#define KR_DNS_TLS_PORT 853
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#define KR_EDNS_VERSION 0
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#define KR_EDNS_PAYLOAD 1232 /* Default UDP payload; see https://www.dnsflagday.net/2020/ */
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#define KR_CACHE_DEFAULT_TTL_MIN (5) /* avoid bursts of queries */
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#define KR_CACHE_DEFAULT_TTL_MAX (1 * 24 * 3600) /* one day seems enough; fits prefill module */
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#define KR_DNAME_STR_MAXLEN (KNOT_DNAME_TXT_MAXLEN + 1)
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#define KR_RRTYPE_STR_MAXLEN (16 + 1)
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/*
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* Address sanitizer hints.
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*/
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#if !defined(__SANITIZE_ADDRESS__) && defined(__has_feature)
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# if __has_feature(address_sanitizer)
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# define __SANITIZE_ADDRESS__ 1
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# endif
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#endif
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#if defined(__SANITIZE_ADDRESS__)
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void __asan_poison_memory_region(void const volatile *addr, size_t size);
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void __asan_unpoison_memory_region(void const volatile *addr, size_t size);
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#define kr_asan_poison(addr, size) __asan_poison_memory_region((addr), (size))
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#define kr_asan_unpoison(addr, size) __asan_unpoison_memory_region((addr), (size))
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#define kr_asan_custom_poison(fn, addr) fn ##_poison((addr))
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#define kr_asan_custom_unpoison(fn, addr) fn ##_unpoison((addr))
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#else
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#define kr_asan_poison(addr, size)
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#define kr_asan_unpoison(addr, size)
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#define kr_asan_custom_poison(fn, addr)
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#define kr_asan_custom_unpoison(fn, addr)
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#endif
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#if defined(__SANITIZE_ADDRESS__) && defined(_FORTIFY_SOURCE)
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#error "You can't use address sanitizer with _FORTIFY_SOURCE"
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// https://github.com/google/sanitizers/issues/247
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#endif
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/* @endcond */
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