@param client_index - opaque cookie to identify the sender
@param context - sender context, to match reply w/ request
@param private_key - private key in binary format of this device
+ @param public_key - public key in binary format of this device
@param port - port of this device
@param src_ip - packet sent through this interface us this
address as the IP source.
u32 user_instance [default=0xffffffff];
vl_api_interface_index_t sw_if_index;
u8 private_key[32];
+ u8 public_key[32];
u16 port;
vl_api_address_t src_ip;
};