shared: add dns_name_parent() call to determine parent domain of a domain

1 files changed, 4 insertions, 0 deletions

diff --git a/src/shared/dns-domain.h b/src/shared/dns-domain.h
index 3f8f621802..02b51832b6 100644
--- a/src/shared/dns-domain.h
+++ b/src/shared/dns-domain.h
@@ -47,6 +47,10 @@ int dns_label_unescape_suffix(const char *name, const char **label_end, char *de
 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);