+ union {
+ struct {
+ __be32 ipv4_src; /* IPv4 source address. */
+ __be32 ipv4_dst; /* IPv4 destination address. */
+ };
+ struct {
+ __be32 ipv6_src[4]; /* IPv6 source address. */
+ __be32 ipv6_dst[4]; /* IPv6 source address. */
+ };
+ };
+ __be32 nd_target[4]; /* IPv6 ND target address. */