DNSの反復検索がどのように行われるかを見るためのツールです． 適当に勉強用に作ってます

$ go build
$ ./RecResolve
RNAME:
   RecResolve - It is a tool to see Iterative Search of the DNS is how to.

USAGE:
   RecResolve [global options] command [command options] [arguments...]
   
VERSION:
   0.0.4
   
COMMANDS:
   rec, r       Iterative Search
   norec, n     No Iterative Search
   help, h      Shows a list of commands or help for one command
   
GLOBAL OPTIONS:
   --root "202.12.27.33"        Root DNS Server's IP address
   --debug                      Debug Option for Developer [$false]
   --fool                       Believe something like flue record [$false]
   --help, -h                   show help
   --version, -v                print the versionecResolve
   
$ ./RecResolve rec www.amazon.co.jp
202.12.27.33=>
        jp. -> b.dns.jp.
203.119.40.1=>
        amazon.co.jp. -> ns2.p31.dynect.net.
        202.12.27.33=>
                net. -> j.gtld-servers.net.
        192.48.79.30=>
                dynect.net. -> ns4.dynamicnetworkservices.net.
                202.12.27.33=>
                        net. -> c.gtld-servers.net.
                192.26.92.30=>
                        dynamicnetworkservices.net. -> ns4.dynamicnetworkservices.net.
                Answer : 204.13.251.100=>
                        ns4.dynamicnetworkservices.net. -> 204.13.251.100
        Answer : 204.13.251.100=>
                ns2.p31.dynect.net. -> 204.13.250.31
204.13.250.31=>
        www.amazon.co.jp. -> ns-1705.awsdns-21.co.uk.
        202.12.27.33=>
                uk. -> dns1.nic.uk.
        156.154.101.3=>
                awsdns-21.co.uk. -> g-ns-1496.awsdns-21.co.uk.
        Answer : 205.251.197.216=>
                ns-1705.awsdns-21.co.uk. -> 205.251.198.169
Answer : 205.251.198.169=>
        www.amazon.co.jp -> 54.240.248.0