Add a reworked IPv4 options match - xt_ipv4options

This revision 1 of ipv4options makes it possible to match the
presence or absence of any of the 32 possible IP options, either all
or any of the options the user specified.

extensions/xt_ipv4options.h

@@ -0,0 +1,26 @@
+#ifndef _LINUX_NETFILTER_XT_IPV4OPTIONS_H
+#define _LINUX_NETFILTER_XT_IPV4OPTIONS_H 1
+
+/* IPv4 allows for a 5-bit option number - 32 options */
+
+/**
+ * %XT_V4OPTS_ALL:	all options in @map must be present (respecting @invert)
+ * %XT_V4OPTS_ANY:	any of the option in @map
+ */
+enum xt_ipv4options_flags {
+	XT_V4OPTS_ALL = 1 << 0,
+	XT_V4OPTS_ANY = 1 << 1,
+};
+
+/**
+ * @map:	bitmask of options that should appear
+ * @invert:	inversion map
+ * @flags:	see above
+ */
+struct xt_ipv4options_mtinfo1 {
+	__u32 map;
+	__u32 invert;
+	__u8 flags;
+};
+
+#endif /* _LINUX_NETFILTER_XT_IPV4OPTIONS_H */