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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
0ef6f454 LP |
2 | #pragma once |
3 | ||
74b2466e | 4 | |
a8fbdf54 TA |
5 | #include <errno.h> |
6 | #include <stdbool.h> | |
7 | #include <stddef.h> | |
8 | #include <stdint.h> | |
9 | ||
74b2466e LP |
10 | #include "hashmap.h" |
11 | #include "in-addr-util.h" | |
12 | ||
3b37fa73 | 13 | /* Length of a single label, with all escaping removed, excluding any trailing dot or NUL byte */ |
74b2466e | 14 | #define DNS_LABEL_MAX 63 |
3b37fa73 LP |
15 | |
16 | /* Worst case length of a single label, with all escaping applied and room for a trailing NUL byte. */ | |
422baca0 | 17 | #define DNS_LABEL_ESCAPED_MAX (DNS_LABEL_MAX*4+1) |
74b2466e | 18 | |
1dfbf000 LP |
19 | /* Maximum length of a full hostname, consisting of a series of unescaped labels, and no trailing dot or NUL byte */ |
20 | #define DNS_HOSTNAME_MAX 253 | |
21 | ||
2b442ac8 | 22 | /* Maximum length of a full hostname, on the wire, including the final NUL byte */ |
5e55cde9 | 23 | #define DNS_WIRE_FORMAT_HOSTNAME_MAX 255 |
2b442ac8 | 24 | |
e7ff0e0b LP |
25 | /* Maximum number of labels per valid hostname */ |
26 | #define DNS_N_LABELS_MAX 127 | |
27 | ||
74b2466e | 28 | int dns_label_unescape(const char **name, char *dest, size_t sz); |
642900d3 | 29 | int dns_label_unescape_suffix(const char *name, const char **label_end, char *dest, size_t sz); |
422baca0 LP |
30 | int dns_label_escape(const char *p, size_t l, char *dest, size_t sz); |
31 | int dns_label_escape_new(const char *p, size_t l, char **ret); | |
74b2466e | 32 | |
f7455baa LP |
33 | static inline int dns_name_parent(const char **name) { |
34 | return dns_label_unescape(name, NULL, DNS_LABEL_MAX); | |
35 | } | |
36 | ||
349cc4a5 | 37 | #if HAVE_LIBIDN |
bdf10b5b LP |
38 | int dns_label_apply_idna(const char *encoded, size_t encoded_size, char *decoded, size_t decoded_max); |
39 | int dns_label_undo_idna(const char *encoded, size_t encoded_size, char *decoded, size_t decoded_max); | |
87057e24 | 40 | #endif |
bdf10b5b | 41 | |
9ca45586 LP |
42 | int dns_name_concat(const char *a, const char *b, char **ret); |
43 | ||
44 | static inline int dns_name_normalize(const char *s, char **ret) { | |
45 | /* dns_name_concat() normalizes as a side-effect */ | |
46 | return dns_name_concat(s, NULL, ret); | |
47 | } | |
48 | ||
df6cfeef NO |
49 | static inline int dns_name_is_valid(const char *s) { |
50 | int r; | |
9ca45586 LP |
51 | |
52 | /* dns_name_normalize() verifies as a side effect */ | |
df6cfeef NO |
53 | r = dns_name_normalize(s, NULL); |
54 | if (r == -EINVAL) | |
55 | return 0; | |
56 | if (r < 0) | |
57 | return r; | |
58 | return 1; | |
59 | } | |
74b2466e | 60 | |
b826ab58 | 61 | void dns_name_hash_func(const void *s, struct siphash *state); |
74b2466e | 62 | int dns_name_compare_func(const void *a, const void *b); |
d5099efc | 63 | extern const struct hash_ops dns_name_hash_ops; |
74b2466e | 64 | |
ae72b22c | 65 | int dns_name_between(const char *a, const char *b, const char *c); |
74b2466e LP |
66 | int dns_name_equal(const char *x, const char *y); |
67 | int dns_name_endswith(const char *name, const char *suffix); | |
eb241cdb | 68 | int dns_name_startswith(const char *name, const char *prefix); |
74b2466e | 69 | |
58db254a LP |
70 | int dns_name_change_suffix(const char *name, const char *old_suffix, const char *new_suffix, char **ret); |
71 | ||
74b2466e | 72 | int dns_name_reverse(int family, const union in_addr_union *a, char **ret); |
b914e211 | 73 | int dns_name_address(const char *p, int *family, union in_addr_union *a); |
74b2466e | 74 | |
dc477e73 LP |
75 | bool dns_name_is_root(const char *name); |
76 | bool dns_name_is_single_label(const char *name); | |
54adabf7 | 77 | |
3cd03457 | 78 | int dns_name_to_wire_format(const char *domain, uint8_t *buffer, size_t len, bool canonical); |
0a49b6b6 | 79 | |
7e8131e9 | 80 | bool dns_srv_type_is_valid(const char *name); |
154ae087 | 81 | bool dnssd_srv_type_is_valid(const char *name); |
0a49b6b6 | 82 | bool dns_service_name_is_valid(const char *name); |
0e8eedbb LP |
83 | |
84 | int dns_service_join(const char *name, const char *type, const char *domain, char **ret); | |
85 | int dns_service_split(const char *joined, char **name, char **type, char **domain); | |
e7ff0e0b LP |
86 | |
87 | int dns_name_suffix(const char *name, unsigned n_labels, const char **ret); | |
88 | int dns_name_count_labels(const char *name); | |
db5b0e92 | 89 | |
97c67192 | 90 | int dns_name_skip(const char *a, unsigned n_labels, const char **ret); |
db5b0e92 | 91 | int dns_name_equal_skip(const char *a, unsigned n_labels, const char *b); |
b9282bc1 LP |
92 | |
93 | int dns_name_common_suffix(const char *a, const char *b, const char **ret); | |
0cf40f55 LP |
94 | |
95 | int dns_name_apply_idna(const char *name, char **ret); | |
08a4849e LP |
96 | |
97 | int dns_name_is_valid_or_address(const char *name); |