1 files changed, 99 insertions, 0 deletions
diff --git a/lib/defines.h b/lib/defines.h
new file mode 100644
index 0000000..dc8c378
--- /dev/null
+++ b/lib/defines.h
@@ -0,0 +1,99 @@
+/*  Copyright (C) 2014-2020 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+ *  SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#pragma once
+
+#include <errno.h>
+#include <libknot/errcode.h>
+#include <libknot/dname.h>
+#include <libknot/rrset.h>
+
+/* Function attributes */
+#if __GNUC__ >= 4
+#define KR_EXPORT __attribute__ ((visibility ("default")))
+#define KR_CONST __attribute__((__const__))
+#define KR_PURE __attribute__((__pure__))
+#define KR_NORETURN __attribute__((__noreturn__))
+#define KR_COLD __attribute__((__cold__))
+#define KR_PRINTF(n) __attribute__((format (printf, n, (n+1))))
+#else
+#define KR_EXPORT
+#define KR_CONST
+#define KR_PURE
+#define KR_NORETURN
+#define KR_COLD
+#define KR_PRINTF(n)
+#endif
+
+#ifndef uint /* Redefining typedef is a C11 feature. */
+typedef unsigned int uint;
+#define uint uint
+#endif
+
+/*
+ * Error codes.
+ */
+#define kr_ok() 0
+/* Mark as cold to mark all branches as unlikely. */
+static inline int KR_COLD kr_error(int x) {
+    return x <= 0 ? x : -x;
+}
+#define kr_strerror(x) strerror(abs(x))
+
+/*
+ * Connection limits.
+ * @cond internal
+ */
+#define KR_CONN_RTT_MAX 2000 /* Timeout for network activity */
+#define KR_CONN_RETRY 200    /* Retry interval for network activity */
+#define KR_ITER_LIMIT 100    /* Built-in iterator limit */
+#define KR_RESOLVE_TIME_LIMIT 10000 /* Upper limit for resolution time of single query, ms */
+#define KR_CNAME_CHAIN_LIMIT 13 /* Built-in maximum CNAME chain length */
+#define KR_TIMEOUT_LIMIT 10   /* Maximum number of retries after timeout. */
+#define KR_QUERY_NSRETRY_LIMIT 4 /* Maximum number of retries per query. */
+#define KR_COUNT_NO_NSADDR_LIMIT 5
+#define KR_CONSUME_FAIL_ROW_LIMIT 3 /* Maximum number of KR_STATE_FAIL in a row. */
+
+/*
+ * Defines.
+ */
+#define KR_DNS_PORT   53
+#define KR_DNS_DOH_PORT 443
+#define KR_DNS_TLS_PORT 853
+#define KR_EDNS_VERSION 0
+#define KR_EDNS_PAYLOAD 1232 /* Default UDP payload; see https://dnsflagday.net/2020/ */
+#define KR_CACHE_DEFAULT_TTL_MIN (5) /* avoid bursts of queries */
+#define KR_CACHE_DEFAULT_TTL_MAX (6 * 24 * 3600) /* 6 days, like the root NS TTL */
+
+#define KR_DNAME_STR_MAXLEN (KNOT_DNAME_TXT_MAXLEN + 1)
+#define KR_RRTYPE_STR_MAXLEN (16 + 1)
+
+/*
+ * Address sanitizer hints.
+ */
+#if !defined(__SANITIZE_ADDRESS__) && defined(__has_feature)
+# if __has_feature(address_sanitizer)
+#  define __SANITIZE_ADDRESS__ 1
+# endif
+#endif
+#if defined(__SANITIZE_ADDRESS__)
+void __asan_poison_memory_region(void const volatile *addr, size_t size);
+void __asan_unpoison_memory_region(void const volatile *addr, size_t size);
+#define kr_asan_poison(addr, size) __asan_poison_memory_region((addr), (size))
+#define kr_asan_unpoison(addr, size) __asan_unpoison_memory_region((addr), (size))
+#define kr_asan_custom_poison(fn, addr) fn ##_poison((addr))
+#define kr_asan_custom_unpoison(fn, addr) fn ##_unpoison((addr))
+#else
+#define kr_asan_poison(addr, size)
+#define kr_asan_unpoison(addr, size)
+#define kr_asan_custom_poison(fn, addr)
+#define kr_asan_custom_unpoison(fn, addr)
+#endif
+
+#if defined(__SANITIZE_ADDRESS__) && defined(_FORTIFY_SOURCE)
+	#error "You can't use address sanitizer with _FORTIFY_SOURCE"
+	// https://github.com/google/sanitizers/issues/247
+#endif
+
+/* @endcond */