Module: DnsResources

Defined in:
lib/dns_resources.rb,
lib/dns_resources/version.rb

Constant Summary collapse

RESOURCE = 
Resolv::DNS::Resource
IN = 
RESOURCE::IN
RESOURCE_TYPES = 
[
  {resource: IN::A, type: "IPv4"},
  {resource: IN::AAAA, type: "IPv6"},
  {resource: IN::CNAME, type: "cname"},
  {resource: RESOURCE::HINFO, type: "hinfo"},
  {resource: RESOURCE::MINFO, type: "minfo"},
  {resource: RESOURCE::MX, type: "mx"},
  {resource: IN::NS, type: "ns"},
  {resource: RESOURCE::PTR, type: "ptr"},
  {resource: RESOURCE::SOA, type: "soa"},
  {resource: IN::SRV, type: "srv"},
  {resource: RESOURCE::TXT, type: "txt"},
  {resource: IN::WKS, type: "wks"}
]
VERSION = 
"0.1.1"

Class Method Summary collapse

Class Method Details

.get_all_resources(host) ⇒ Object 



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# File 'lib/dns_resources.rb', line 23

def self.get_all_resources(host)
  result = []
  resources = Resolv::DNS.new.getresources(host, IN::ANY)
  unless resources.empty?
    resources.each do |resource|
      result << get_resource_by_type(host, resource.class)
    end
  end
  result
end

.get_resource_by_type(host, type) ⇒ Object 



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# File 'lib/dns_resources.rb', line 34

def self.get_resource_by_type(host, type)
  resource_type = type.class.eql?(String) ? get_type_class(type) : type
  resource = Resolv::DNS.new.getresource(host, resource_type)
  values = get_resource_values(resource)
  { type: get_type(resource.class) }.merge(values)
end

.get_resource_values(resource) ⇒ Object 



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# File 'lib/dns_resources.rb', line 41

def self.get_resource_values(resource)
  return {} unless RESOURCE_TYPES.map { |v| v[:resource] }.include?(resource.class)
  case
  when resource.class.eql?(IN::A)
    { address: resource.address.to_s }
  when resource.class.eql?(IN::AAAA)
    { address: resource.address.to_s }
  when resource.class.eql?(IN::CNAME)
    { name: resource.name.to_s }
  when resource.class.eql?(RESOURCE::HINFO)
    { cpu: resource.cpu, os: resource.os }
  when resource.class.eql?(RESOURCE::MINFO)
    { emailbx: resource.emailbx, rmailbx: resource.rmailbx }
  when resource.class.eql?(RESOURCE::MX)
    { exchange: resource.exchange.to_s, preference: resource.preference }
  when resource.class.eql?(IN::NS)
    { name: resource.name.to_s }
  when resource.class.eql?(RESOURCE::PTR)
    { name: resource.name.to_s }
  when resource.class.eql?(RESOURCE::SOA)
    { mname: resource.mname.to_s, rname: resource.rname.to_s,
      refresh: resource.refresh, retry: resource.retry,
      expire: resource.expire, minimum: resource.minimum,
      serial: resource.serial }
  when resource.class.eql?(IN::SRV)
    { port: resource.port, priority: resource.priority,
      target: resource.target, weight: resource.weight }
  when resource.class.eql?(RESOURCE::TXT)
    { name: resource.strings }
  when resource.class.eql?(IN::WKS)
    { address: resource.address.to_s, bitmap: resource.bitmap, protocol: resource.protocol }
  else
    {}
  end
end

.get_type(resource_class) ⇒ Object 



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# File 'lib/dns_resources.rb', line 77

def self.get_type(resource_class)
  RESOURCE_TYPES.each do |v|
    return v[:type] if v[:resource].eql?(resource_class)
  end
end

.get_type_class(type) ⇒ Object 



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# File 'lib/dns_resources.rb', line 83

def self.get_type_class(type)
  RESOURCE_TYPES.each do |v|
    return v[:resource] if v[:type].eql?(type)
  end
end