how i implement request ip from 192.168.2.2 to 192.168.2.254,once time post 30 request.when 30 requests complete,request next request

Question

how i implement request ip from 192.168.2.2 to 192.168.2.254,once time post 30 request.when 30 requests complete,request next request. code by swift language,thanks.when i