Class: FTW::DNS::DNS

Inherits:
Object
  • Object
show all
Defined in:
lib/ftw/dns/dns.rb

Overview

A FTW::DNS resolver that uses Socket.gethostbyname() to resolve addresses.

Instance Method Summary collapse

Instance Method Details

#resolve(hostname) ⇒ Object

Resolve a hostname.

It will return an array of all known addresses for the host.



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# File 'lib/ftw/dns/dns.rb', line 12

def resolve(hostname)
  official, aliases, family, *addresses = Socket.gethostbyname(hostname)
  # We ignore family, here. Ruby will return v6 *and* v4 addresses in
  # the same gethostbyname() call. It is confusing. 
  #
  # Let's just rely entirely on the length of the address string.
  return addresses.collect do |address|
    if address.length == 16
      unpack_v6(address)
    else
      unpack_v4(address)
    end
  end
end