diff options
Diffstat (limited to 'src/shared/dns-domain.h')
-rw-r--r-- | src/shared/dns-domain.h | 35 |
1 files changed, 24 insertions, 11 deletions
diff --git a/src/shared/dns-domain.h b/src/shared/dns-domain.h index 0fd72cb029..6ed512c6b1 100644 --- a/src/shared/dns-domain.h +++ b/src/shared/dns-domain.h @@ -1,9 +1,6 @@ /* SPDX-License-Identifier: LGPL-2.1+ */ #pragma once -/*** - ***/ - #include <errno.h> #include <stdbool.h> #include <stddef.h> @@ -27,13 +24,18 @@ /* 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 @@ -41,18 +43,29 @@ int dns_label_apply_idna(const char *encoded, size_t encoded_size, char *decoded 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) @@ -60,8 +73,8 @@ static inline int dns_name_is_valid(const char *s) { 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); |