diff options
Diffstat (limited to 'src/shared/dns-domain.h')
-rw-r--r-- | src/shared/dns-domain.h | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/src/shared/dns-domain.h b/src/shared/dns-domain.h index 99c72574db..40c9ee5f27 100644 --- a/src/shared/dns-domain.h +++ b/src/shared/dns-domain.h @@ -22,17 +22,38 @@ #pragma once +#include <errno.h> +#include <stdbool.h> +#include <stddef.h> +#include <stdint.h> + #include "hashmap.h" #include "in-addr-util.h" +/* Length of a single label, with all escaping removed, excluding any trailing dot or NUL byte */ #define DNS_LABEL_MAX 63 + +/* Worst case length of a single label, with all escaping applied and room for a trailing NUL byte. */ #define DNS_LABEL_ESCAPED_MAX (DNS_LABEL_MAX*4+1) +/* Maximum length of a full hostname, consisting of a series of unescaped labels, and no trailing dot or NUL byte */ +#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 + +/* 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); 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); +} + 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); @@ -62,6 +83,7 @@ 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_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); @@ -71,10 +93,20 @@ 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); +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 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 **name, char **type, char **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); |