+#include <inttypes.h>
+
+#include <avahi-common/cdecl.h>
+
+#ifndef DOXYGEN_SHOULD_SKIP_THIS
+AVAHI_C_DECL_BEGIN
+#endif
+
+/** Protocol family specification, takes the values AVAHI_PROTO_INET, AVAHI_PROTO_INET6, AVAHI_PROTO_UNSPEC */
+typedef int AvahiProtocol;
+
+/** Numeric network interface index. Takes OS dependent values and the special constant AVAHI_IF_UNSPEC */
+typedef int AvahiIfIndex;
+
+/** Values for AvahiProtocol */
+enum {
+ AVAHI_PROTO_INET = 0, /**< IPv4 */
+ AVAHI_PROTO_INET6 = 1, /**< IPv6 */
+ AVAHI_PROTO_UNSPEC = -1 /**< Unspecified/all protocol(s) */
+};
+
+/** Special values for AvahiIfIndex */
+enum {
+ AVAHI_IF_UNSPEC = -1 /**< Unspecified/all interface(s) */
+};
+
+/** Return TRUE if the specified interface index is valid */
+#define AVAHI_IF_VALID(ifindex) (((ifindex) >= 0) || ((ifindex) == AVAHI_PROTO_UNSPEC))
+
+/** Return TRUE if the specified protocol is valid */
+#define AVAHI_PROTO_VALID(protocol) (((protocol) == AVAHI_PROTO_INET) || ((protocol) == AVAHI_PROTO_INET6) || ((protocol) == AVAHI_PROTO_UNSPEC))