nla_memcmp
int nla_memcmp(const struct nlattr *nla, const void *data, size_t size);
EXPORT_SYMBOL(nla_memcmp);
if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
nla_memcmp(tb[FRA_SRC], &rule6->src.addr, sizeof(struct in6_addr)))
nla_memcmp(tb[FRA_DST], &rule6->dst.addr, sizeof(struct in6_addr)))