typedef void (*nat_ha_sdel_cb_t) (ip4_address_t * out_addr, u16 out_port,
ip4_address_t * eh_addr, u16 eh_port,
u8 proto, u32 fib_index, u32 thread_index);
typedef void (*nat_ha_sdel_cb_t) (ip4_address_t * out_addr, u16 out_port,
ip4_address_t * eh_addr, u16 eh_port,
u8 proto, u32 fib_index, u32 thread_index);