Class: Resolv::MDNS
Overview
Resolv::MDNS is a one-shot Multicast DNS (mDNS) resolver. It blindly makes queries to the mDNS addresses without understanding anything about multicast ports.
Information taken form the following places:
-
RFC 6762
Constant Summary collapse
- Port =
Default mDNS Port
5353
- AddressV4 =
Default IPv4 mDNS address
'224.0.0.251'
- AddressV6 =
Default IPv6 mDNS address
'ff02::fb'
- Addresses =
Default mDNS addresses
[ [AddressV4, Port], [AddressV6, Port], ]
Constants inherited from DNS
DNS::RequestID, DNS::RequestIDMutex, DNS::UDPSize
Instance Method Summary collapse
-
#each_address(name) ⇒ Object
Iterates over all IP addresses for
name
retrieved from the mDNS resolver, provided name ends with “local”. -
#initialize(config_info = nil) ⇒ MDNS
constructor
Creates a new one-shot Multicast DNS (mDNS) resolver.
-
#make_udp_requester ⇒ Object
:nodoc:.
Methods inherited from DNS
allocate_request_id, bind_random_port, #close, #each_name, #each_resource, #extract_resources, #fetch_resource, free_request_id, #getaddress, #getaddresses, #getname, #getnames, #getresource, #getresources, #lazy_initialize, #make_tcp_requester, open, random, #timeouts=
Constructor Details
#initialize(config_info = nil) ⇒ MDNS
Creates a new one-shot Multicast DNS (mDNS) resolver.
config_info
can be:
- nil
-
Uses the default mDNS addresses
- Hash
-
Must contain :nameserver or :nameserver_port like Resolv::DNS#initialize.
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# File 'lib/resolv.rb', line 3184 def initialize(config_info=nil) if config_info then super({ nameserver_port: Addresses }.merge(config_info)) else super(nameserver_port: Addresses) end end |
Instance Method Details
#each_address(name) ⇒ Object
Iterates over all IP addresses for name
retrieved from the mDNS resolver, provided name ends with “local”. If the name does not end in “local” no records will be returned.
name
can be a Resolv::DNS::Name or a String. Retrieved addresses will be a Resolv::IPv4 or Resolv::IPv6
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# File 'lib/resolv.rb', line 3200 def each_address(name) name = Resolv::DNS::Name.create(name) return unless name[-1].to_s == 'local' super(name) end |
#make_udp_requester ⇒ Object
:nodoc:
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# File 'lib/resolv.rb', line 3208 def make_udp_requester # :nodoc: nameserver_port = @config.nameserver_port Requester::MDNSOneShot.new(*nameserver_port) end |