shared: add new API to validate a string as hostname or IP address

1 files changed, 12 insertions, 0 deletions

diff --git a/src/shared/dns-domain.c b/src/shared/dns-domain.c
index f9a6fd5f03..33debadb15 100644
--- a/src/shared/dns-domain.c
+++ b/src/shared/dns-domain.c
@@ -1324,3 +1324,15 @@ int dns_name_apply_idna(const char *name, char **ret) {
 
         return (int) n;
 }
+
+int dns_name_is_valid_or_address(const char *name) {
+        /* Returns > 0 if the specified name is either a valid IP address formatted as string or a valid DNS name */
+
+        if (isempty(name))
+                return 0;
+
+        if (in_addr_from_string_auto(name, NULL, NULL) >= 0)
+                return 1;
+
+        return dns_name_is_valid(name);
+}