1 files changed, 36 insertions, 0 deletions
diff --git a/src/lib-dns/dns-util.h b/src/lib-dns/dns-util.h
new file mode 100644
index 0000000..cff52ff
--- /dev/null
+++ b/src/lib-dns/dns-util.h
@@ -0,0 +1,36 @@
+#ifndef DNS_UTIL_H
+#define DNS_UTIL_H 1
+
+static inline char
+dns_tolower(char c)
+{
+	if (c >= 'A' && c <= 'Z')
+		c+='a'-'A';
+	return c;
+}
+
+/**
+ * Will compare names in accordance with RFC4343
+ */
+int dns_compare(const char *a, const char *b) ATTR_PURE;
+int dns_ncompare(const char *a, const char *b, size_t n) ATTR_PURE;
+
+/**
+ * Same as above but done by labels from right to left
+ *
+ * www.example.org and www.example.net would be compared as
+ * org = net (return first difference)
+ * example = example
+ * www = www
+ */
+int dns_compare_labels(const char *a, const char *b) ATTR_PURE;
+
+/**
+ * Will match names in RFC4592 style
+ *
+ * this means *.foo.bar will match name.foo.bar
+ * but *DOES NOT* match something.name.foo.bar
+ */
+int dns_match_wildcard(const char *name, const char *mask) ATTR_PURE;
+
+#endif