diff options
Diffstat (limited to 'src/shared/dns-domain.c')
| -rw-r--r-- | src/shared/dns-domain.c | 26 |
1 files changed, 9 insertions, 17 deletions
diff --git a/src/shared/dns-domain.c b/src/shared/dns-domain.c index e6aad39c74..31b5891435 100644 --- a/src/shared/dns-domain.c +++ b/src/shared/dns-domain.c @@ -29,6 +29,7 @@ #include "hexdecoct.h" #include "parse-util.h" #include "string-util.h" +#include "strv.h" #include "utf8.h" int dns_label_unescape(const char **name, char *dest, size_t sz) { @@ -752,36 +753,27 @@ int dns_name_address(const char *p, int *family, union in_addr_union *address) { return 0; } -int dns_name_root(const char *name) { - char label[DNS_LABEL_MAX+1]; - int r; +bool dns_name_is_root(const char *name) { assert(name); - r = dns_label_unescape(&name, label, sizeof(label)); - if (r < 0) - return r; + /* There are exactly two ways to encode the root domain name: + * as empty string, or with a single dot. */ - return r == 0 && *name == 0; + return STR_IN_SET(name, "", "."); } -int dns_name_single_label(const char *name) { +bool dns_name_is_single_label(const char *name) { char label[DNS_LABEL_MAX+1]; int r; assert(name); r = dns_label_unescape(&name, label, sizeof(label)); - if (r < 0) - return r; - if (r == 0) - return 0; - - r = dns_label_unescape(&name, label, sizeof(label)); - if (r < 0) - return r; + if (r <= 0) + return false; - return r == 0 && *name == 0; + return dns_name_is_root(name); } /* Encode a domain name according to RFC 1035 Section 3.1 */ |