在iOS(Objective c)中列出在同一网络中可用的ip地址和设备名称

I am developing the iOS application using objective-c.The main usage of the application is communicating with wifi enabled hardware device.It's uses UDP protocol.Now the problem is all the hardware device are connected with my office network and my iPad also connected with my office network.Now i want to list the available ip-address in the same network.So many duplicate questions are there but no place i found the solution for this.please help me.I am developing the iOS application using objec