diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-10 20:49:52 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-10 20:49:52 +0000 |
commit | 55944e5e40b1be2afc4855d8d2baf4b73d1876b5 (patch) | |
tree | 33f869f55a1b149e9b7c2b7e201867ca5dd52992 /src/shared/dns-domain.h | |
parent | Initial commit. (diff) | |
download | systemd-55944e5e40b1be2afc4855d8d2baf4b73d1876b5.tar.xz systemd-55944e5e40b1be2afc4855d8d2baf4b73d1876b5.zip |
Adding upstream version 255.4.upstream/255.4
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/shared/dns-domain.h | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/src/shared/dns-domain.h b/src/shared/dns-domain.h new file mode 100644 index 0000000..331fb89 --- /dev/null +++ b/src/shared/dns-domain.h @@ -0,0 +1,104 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +#pragma once + +#include <errno.h> +#include <stdbool.h> +#include <stddef.h> +#include <stdint.h> + +#include "dns-def.h" +#include "hashmap.h" +#include "in-addr-util.h" + +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 */ + DNS_LABEL_LEAVE_TRAILING_DOT = 1 << 2, /* Leave trailing dot in place */ +} 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, 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, DNSLabelFlags flags, 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, flags, ret); +} + +static inline int dns_name_is_valid(const char *s) { + int r; + + /* dns_name_concat() verifies as a side effect */ + r = dns_name_concat(s, NULL, 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 r; + return 1; +} + +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; +extern const struct hash_ops dns_name_hash_ops_free; + +int dns_name_between(const char *a, const char *b, const char *c); +int dns_name_equal(const char *x, const char *y); +int dns_name_endswith(const char *name, const char *suffix); +int dns_name_startswith(const char *name, const char *prefix); + +int dns_name_change_suffix(const char *name, const char *old_suffix, const char *new_suffix, char **ret); + +int dns_name_reverse(int family, const union in_addr_union *a, char **ret); +int dns_name_address(const char *p, int *family, union in_addr_union *a); + +bool dns_name_is_root(const char *name); +bool dns_name_is_single_label(const char *name); + +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_service_split(const char *joined, char **ret_name, char **ret_type, char **ret_domain); + +int dns_name_suffix(const char *name, unsigned n_labels, const char **ret); +int dns_name_count_labels(const char *name); + +int dns_name_skip(const char *a, unsigned n_labels, const char **ret); +int dns_name_equal_skip(const char *a, unsigned n_labels, const char *b); + +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); + +int dns_name_dot_suffixed(const char *name); + +bool dns_name_dont_resolve(const char *name); |