+u8 *
+format_igmp_mode (u8 * s, va_list * args)
+{
+ igmp_mode_t mode = va_arg (*args, igmp_mode_t);
+
+ switch (mode)
+ {
+#define _(n,f) case IGMP_MODE_##f: return (format (s, "%s", #f));
+ foreach_igmp_mode
+#undef _
+ }
+ return (format (s, "unknown:%d", mode));
+
+}
+