+ return 1;
+}
+
+/* Called when user tries to insert an entry of this type. */
+static int
+udp6_checkentry(const char *tablename,
+ const void *entry,
+ void *matchinfo,
+ unsigned int matchinfosize,
+ unsigned int hook_mask)
+{
+ const struct ip6t_ip6 *ipv6 = entry;
+ const struct xt_udp *udpinfo = matchinfo;
+
+ /* Must specify proto == UDP, and no unknown invflags */
+ if (ipv6->proto != IPPROTO_UDP || (ipv6->invflags & XT_INV_PROTO)) {
+ duprintf("ip6t_udp: Protocol %u != %u\n", ipv6->proto,
+ IPPROTO_UDP);
+ return 0;
+ }
+ if (matchinfosize != XT_ALIGN(sizeof(struct xt_udp))) {
+ duprintf("ip6t_udp: matchsize %u != %u\n",
+ matchinfosize, XT_ALIGN(sizeof(struct xt_udp)));
+ return 0;
+ }
+ if (udpinfo->invflags & ~XT_UDP_INV_MASK) {
+ duprintf("ip6t_udp: unknown flags %X\n",
+ udpinfo->invflags);
+ return 0;
+ }
+
+ return 1;