-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2014 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
- ***/
-
+/* SPDX-License-Identifier: LGPL-2.1+ */
#pragma once
-
#include <errno.h>
#include <stdbool.h>
#include <stddef.h>
#define DNS_HOSTNAME_MAX 253
/* Maximum length of a full hostname, on the wire, including the final NUL byte */
-#define DNS_WIRE_FOMAT_HOSTNAME_MAX 255
+#define DNS_WIRE_FORMAT_HOSTNAME_MAX 255
/* Maximum number of labels per valid hostname */
#define DNS_N_LABELS_MAX 127
-int dns_label_unescape(const char **name, char *dest, size_t sz);
+typedef enum DNSLabelFlags {
+ DNS_LABEL_LDH = 1 << 0, /* Follow the "LDH" rule — only letters, digits, and internal hyphens. */
+ DNS_LABEL_NO_ESCAPES = 1 << 1, /* Do not treat backslashes specially */
+} DNSLabelFlags;
+
+int dns_label_unescape(const char **name, char *dest, size_t sz, DNSLabelFlags flags);
int dns_label_unescape_suffix(const char *name, const char **label_end, char *dest, size_t sz);
int dns_label_escape(const char *p, size_t l, char *dest, size_t sz);
int dns_label_escape_new(const char *p, size_t l, char **ret);
static inline int dns_name_parent(const char **name) {
- return dns_label_unescape(name, NULL, DNS_LABEL_MAX);
+ return dns_label_unescape(name, NULL, DNS_LABEL_MAX, 0);
}
+#if HAVE_LIBIDN
int dns_label_apply_idna(const char *encoded, size_t encoded_size, char *decoded, size_t decoded_max);
int dns_label_undo_idna(const char *encoded, size_t encoded_size, char *decoded, size_t decoded_max);
+#endif
-int dns_name_concat(const char *a, const char *b, char **ret);
+int dns_name_concat(const char *a, const char *b, DNSLabelFlags flags, char **ret);
-static inline int dns_name_normalize(const char *s, char **ret) {
+static inline int dns_name_normalize(const char *s, DNSLabelFlags flags, char **ret) {
/* dns_name_concat() normalizes as a side-effect */
- return dns_name_concat(s, NULL, ret);
+ return dns_name_concat(s, NULL, flags, ret);
}
static inline int dns_name_is_valid(const char *s) {
int r;
/* dns_name_normalize() verifies as a side effect */
- r = dns_name_normalize(s, NULL);
+ r = dns_name_normalize(s, 0, NULL);
+ if (r == -EINVAL)
+ return 0;
+ if (r < 0)
+ return r;
+ return 1;
+}
+
+static inline int dns_name_is_valid_ldh(const char *s) {
+ int r;
+
+ r = dns_name_concat(s, NULL, DNS_LABEL_LDH|DNS_LABEL_NO_ESCAPES, NULL);
if (r == -EINVAL)
return 0;
if (r < 0)
return 1;
}
-void dns_name_hash_func(const void *s, struct siphash *state);
-int dns_name_compare_func(const void *a, const void *b);
+void dns_name_hash_func(const char *s, struct siphash *state);
+int dns_name_compare_func(const char *a, const char *b);
extern const struct hash_ops dns_name_hash_ops;
int dns_name_between(const char *a, const char *b, const char *c);
int dns_name_to_wire_format(const char *domain, uint8_t *buffer, size_t len, bool canonical);
bool dns_srv_type_is_valid(const char *name);
+bool dnssd_srv_type_is_valid(const char *name);
bool dns_service_name_is_valid(const char *name);
int dns_service_join(const char *name, const char *type, const char *domain, char **ret);
int dns_name_common_suffix(const char *a, const char *b, const char **ret);
int dns_name_apply_idna(const char *name, char **ret);
+
+int dns_name_is_valid_or_address(const char *name);