diff options
Diffstat (limited to 'src/shared/dns-domain.c')
| -rw-r--r-- | src/shared/dns-domain.c | 26 |
1 files changed, 18 insertions, 8 deletions
diff --git a/src/shared/dns-domain.c b/src/shared/dns-domain.c index 4739cc880b..8c807e0e23 100644 --- a/src/shared/dns-domain.c +++ b/src/shared/dns-domain.c @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: LGPL-2.1+ */ /*** This file is part of systemd. @@ -692,23 +693,26 @@ int dns_name_change_suffix(const char *name, const char *old_suffix, const char } int dns_name_between(const char *a, const char *b, const char *c) { - int n; - /* Determine if b is strictly greater than a and strictly smaller than c. We consider the order of names to be circular, so that if a is strictly greater than c, we consider b to be between them if it is either greater than a or smaller than c. This is how the canonical DNS name order used in NSEC records work. */ - n = dns_name_compare_func(a, c); - if (n == 0) - return -EINVAL; - else if (n < 0) - /* a<---b--->c */ + if (dns_name_compare_func(a, c) < 0) + /* + a and c are properly ordered: + a<---b--->c + */ return dns_name_compare_func(a, b) < 0 && dns_name_compare_func(b, c) < 0; else - /* <--b--c a--b--> */ + /* + a and c are equal or 'reversed': + <--b--c a-----> + or: + <-----c a--b--> + */ return dns_name_compare_func(b, c) < 0 || dns_name_compare_func(a, b) < 0; } @@ -958,6 +962,12 @@ bool dns_srv_type_is_valid(const char *name) { return c == 2; /* exactly two labels */ } +bool dnssd_srv_type_is_valid(const char *name) { + return dns_srv_type_is_valid(name) && + ((dns_name_endswith(name, "_tcp") > 0) || + (dns_name_endswith(name, "_udp") > 0)); /* Specific to DNS-SD. RFC 6763, Section 7 */ +} + bool dns_service_name_is_valid(const char *name) { size_t l; |