ddig

ddig is DNS lookup utility for Ruby.

Features

DNS Resolvers
- UDP (Do53)
- DoT (DNS over TLS)
  - https://www.rfc-editor.org/rfc/rfc7858.html
- DoH (DNS over HTTPS)
  - Support only HTTP/1.1
  - https://www.rfc-editor.org/rfc/rfc8484.html
- ~~DoQ (DNS over QUIC)~~
  - Not Supported
  - https://www.rfc-editor.org/rfc/rfc9250.html
DDR (Discovery of Designated Resolvers)
- https://www.rfc-editor.org/rfc/rfc9462.html

Installation

Install the gem and add to the application's Gemfile by executing:

$ bundle add ddig

If bundler is not being used to manage dependencies, install the gem by executing:

$ gem install ddig

Usage

Ruby

ddig = Ddig.lookup('dns.google', nameservers: ['8.8.8.8', '2001:4860:4860::8888'])

ddig[:do53][:ipv4]
=> #<Ddig::Resolver::Do53:0x00000001207aaeb0 @a=["8.8.4.4", "8.8.8.8"], @aaaa=["2001:4860:4860::8844", "2001:4860:4860::8888"], @hostname="dns.google", @ip=:ipv4, @nameservers=["8.8.8.8"]>
ddig[:do53][:ipv6]
=> #<Ddig::Resolver::Do53:0x000000012073d2c0 @a=["8.8.4.4", "8.8.8.8"], @aaaa=["2001:4860:4860::8844", "2001:4860:4860::8888"], @hostname="dns.google", @ip=:ipv4, @nameservers=["2001:4860:4860::8888"]>

ddig[:ddr]
=> [#<Ddig::Ddr::DesignatedResolver:0x0000000120735480
    @address="8.8.8.8",
    @dohpath=nil,
    @ip=:ipv4,
    @port=853,
    @protocol="dot",
    @target="dns.google",
    @unencrypted_resolver="8.8.8.8",
    @verify_cert=
     #<Ddig::Ddr::VerifyCert:0x00000001207321e0
      @address="8.8.8.8",
      @hostname="dns.google",
      @open_timeout=3,
      @port=853,
      @subject_alt_name=
       ["DNS:dns.google",
        "IP Address:8.8.8.8",
        "IP Address:2001:4860:4860:0:0:0:0:8888",
		...
        "IP Address:2001:4860:4860:0:0:0:0:64"],
      @unencrypted_resolver="8.8.8.8",
      @verify=true>>,
   #<Ddig::Ddr::DesignatedResolver:0x0000000120733b30
    @address="8.8.8.8",
    @dohpath="/dns-query{?dns}",
    @ip=:ipv4,
    @port=443,
    @protocol="h2",
    @target="dns.google",
    @unencrypted_resolver="8.8.8.8",
    @verify_cert=
     #<Ddig::Ddr::VerifyCert:0x0000000120451bd8
      @address="8.8.8.8",
      @hostname="dns.google",
      @open_timeout=3,
      @port=443,
      @subject_alt_name=
       ["DNS:dns.google",
        "IP Address:8.8.8.8",
        "IP Address:2001:4860:4860:0:0:0:0:8888",
		...
        "IP Address:2001:4860:4860:0:0:0:0:64"],
      @unencrypted_resolver="8.8.8.8",
      @verify=true>>,
   ...
]

Do53

do53 = Ddig::Resolver::Do53.new(hostname: 'dns.google', nameservers: '8.8.8.8').lookup
=> #<Ddig::Resolver::Do53:0x0000000121717b78 @a=["8.8.8.8", "8.8.4.4"], @aaaa=["2001:4860:4860::8844", "2001:4860:4860::8888"], @hostname="dns.google", @ip=nil, @nameserver=#<Ddig::Nameserver:0x00000001211fb108 @nameservers="8.8.8.8", @servers=["8.8.8.8"]>, @nameservers=["8.8.8.8"]>

do53.a
=> ["8.8.4.4", "8.8.8.8"]
do53.aaaa
=> ["2001:4860:4860::8844", "2001:4860:4860::8888"]

DoT

dot = Ddig::Resolver::Dot.new(hostname: 'dns.google', server: '8.8.8.8').lookup
=> #<Ddig::Resolver::Dot:0x000000012145da90 @a=["8.8.8.8", "8.8.4.4"], @aaaa=["2001:4860:4860::8844", "2001:4860:4860::8888"], @hostname="dns.google", @open_timeout=3, @port=853, @server="8.8.8.8", @server_name=nil>

dot.a
=> ["8.8.4.4", "8.8.8.8"]
dot.aaaa
=> ["2001:4860:4860::8844", "2001:4860:4860::8888"]

DoH (HTTP/1.1)

doh = Ddig::Resolver::DohH1.new(hostname: 'dns.google', server: 'dns.google', dohpath: '/dns-query{?dns}').lookup
=> #<Ddig::Resolver::DohH1:0x00000001023ed020 @a=["8.8.4.4", "8.8.8.8"], @aaaa=["2001:4860:4860::8888", "2001:4860:4860::8844"], @address=nil, @dohpath="/dns-query{?dns}", @hostname="dns.google", @open_timeout=10, @port=443, @server="dns.google">

doh.a
=> ["8.8.4.4", "8.8.8.8"]
doh.aaaa
=> ["2001:4860:4860::8844", "2001:4860:4860::8888"]

CLI

Usage

$ ddig --help
Usage: ddig [options] hostname
    -d, --dns-type={all|do53|dot}    resolve type (default: all)
        --udp                        use resolve type of udp(do53)
        --dot                        use resolve type of dot
        --doh-h1                     use resolve type of doh (http/1.1)
        --doh-path=doh-path          doh service path
        --ddr                        discover designated resolvers via ddr (discovery of designated resolvers)
    -4, --ipv4                       use IPv4 query transport only
    -6, --ipv6                       use IPv6 query transport only
    -@ipaddress|doh-hostname,        nameserver
        --nameserver
    -p, --port=port                  port
        --format={text|json}         output format (default: text)

    -v, --verbose                    run verbosely
    -h, --help                       show this help message.
        --version                    show version.

$ ddig --nameserver 8.8.8.8 dns.google
# Do53 (IPv4)
dns.google	A	8.8.4.4
dns.google	A	8.8.8.8
dns.google	AAAA	2001:4860:4860::8844
dns.google	AAAA	2001:4860:4860::8888

# SERVER: 8.8.8.8

# DDR
## DDR (#0) - dot: dns.google:853 (8.8.4.4),	unencrypted_resolver: 8.8.8.8, 	verify cert: true
dns.google	A	8.8.4.4
dns.google	A	8.8.8.8
dns.google	AAAA	2001:4860:4860::8844
dns.google	AAAA	2001:4860:4860::8888

# SERVER(Address): 8.8.4.4
# PORT: 853

...

# SERVER(Address): 2001:4860:4860::8888
# PORT: 853

## DDR (#6) - h2: dns.google:443 (2001:4860:4860::8888),	path: /dns-query{?dns},	unencrypted_resolver: 8.8.8.8, 	verify cert: true
dns.google	A	8.8.8.8
dns.google	A	8.8.4.4
dns.google	AAAA	2001:4860:4860::8844
dns.google	AAAA	2001:4860:4860::8888

# SERVER(Hostname): 2001:4860:4860::8888
# SERVER(Path): /dns-query{?dns}
# PORT: 443
...

UDP(Do53)

$ ddig --udp --nameserver 8.8.8.8 dns.google
dns.google	A	8.8.8.8
dns.google	A	8.8.4.4
dns.google	AAAA	2001:4860:4860::8844
dns.google	AAAA	2001:4860:4860::8888

# SERVER: 8.8.8.8

DoT

$ ddig --dot --nameserver 8.8.8.8 dns.google
dns.google	A	8.8.8.8
dns.google	A	8.8.4.4
dns.google	AAAA	2001:4860:4860::8888
dns.google	AAAA	2001:4860:4860::8844

# SERVER(Address): 8.8.8.8
# PORT: 853

DoH (HTTP/1.1)

$ ddig --doh-h1 --nameserver dns.google --doh-path /dns-query{?dns} dns.google
dns.google	A	8.8.8.8
dns.google	A	8.8.4.4
dns.google	AAAA	2001:4860:4860::8888
dns.google	AAAA	2001:4860:4860::8844

# SERVER(Hostname): dns.google
# SERVER(Path): /dns-query{?dns}
# PORT: 443

DDR (Discovery of Designated Resolvers)

$ ddig --ddr --nameserver 8.8.8.8
dot: dns.google:853 (8.8.8.8),	unencrypted_resolver: 8.8.8.8, 	verify cert: true
dot: dns.google:853 (8.8.4.4),	unencrypted_resolver: 8.8.8.8, 	verify cert: true
dot: dns.google:853 (2001:4860:4860::8844),	unencrypted_resolver: 8.8.8.8, 	verify cert: true
dot: dns.google:853 (2001:4860:4860::8888),	unencrypted_resolver: 8.8.8.8, 	verify cert: true
h2: dns.google:443 (8.8.8.8),	path: /dns-query{?dns},	unencrypted_resolver: 8.8.8.8, 	verify cert: true
h2: dns.google:443 (8.8.4.4),	path: /dns-query{?dns},	unencrypted_resolver: 8.8.8.8, 	verify cert: true
h2: dns.google:443 (2001:4860:4860::8844),	path: /dns-query{?dns},	unencrypted_resolver: 8.8.8.8, 	verify cert: true
h2: dns.google:443 (2001:4860:4860::8888),	path: /dns-query{?dns},	unencrypted_resolver: 8.8.8.8, 	verify cert: true
h3: dns.google:443 (8.8.4.4),	path: /dns-query{?dns},	unencrypted_resolver: 8.8.8.8, 	verify cert: true
h3: dns.google:443 (8.8.8.8),	path: /dns-query{?dns},	unencrypted_resolver: 8.8.8.8, 	verify cert: true
h3: dns.google:443 (2001:4860:4860::8888),	path: /dns-query{?dns},	unencrypted_resolver: 8.8.8.8, 	verify cert: true
h3: dns.google:443 (2001:4860:4860::8844),	path: /dns-query{?dns},	unencrypted_resolver: 8.8.8.8, 	verify cert: true

# SERVER: 8.8.8.8

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and the created tag, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/taketo1113/ddig.

License

The gem is available as open source under the terms of the MIT License.

Name		Name	Last commit message	Last commit date
Latest commit History 66 Commits
.github/workflows		.github/workflows
bin		bin
exe		exe
lib		lib
sig		sig
spec		spec
.gitignore		.gitignore
.rspec		.rspec
Gemfile		Gemfile
LICENSE.txt		LICENSE.txt
README.md		README.md
Rakefile		Rakefile
ddig.gemspec		ddig.gemspec

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