ethtool_ah_espip6_spec
struct ethtool_ah_espip6_spec *ah_esp_hdr = &fsp->h_u.ah_ip6_spec;
struct ethtool_ah_espip6_spec *ah_esp_mask = &fsp->m_u.ah_ip6_spec;
struct ethtool_ah_espip6_spec ah_ip6_spec;
struct ethtool_ah_espip6_spec esp_ip6_spec;