SADB_X_EXT_NAT_T_SPORT
n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
if (ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1]) {
ext_hdrs[SADB_X_EXT_NAT_T_SPORT-1];
n_port->sadb_x_nat_t_port_exttype = SADB_X_EXT_NAT_T_SPORT;
[SADB_X_EXT_NAT_T_SPORT] = (u8) sizeof(struct sadb_x_nat_t_port),