Sha256: 98875e96f51a7281908626dbfaa14570f2924df7f798dff6aed9ed79c2501ef8
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Versions: 5
Compression:
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Contents
require "resolv"
require "timeout"
module Net
module DNS
autoload :ARecord, "net/dns/a_record.rb"
autoload :PTRRecord, "net/dns/ptr_record.rb"
# Looks up the IP or MAC address. Handles the conversion of a DNS miss
# exception into nil
# [+query+]: IP or hostname
# Returns: a new DNS record object, A or PTR accordingly
# We query DNS directly, as its faster then to query our own proxy.
def self.lookup query, proxy, resolver = Resolv::DNS.new
Timeout::timeout(3) do
if (query =~ Validations::IP_REGEXP)
n = resolver.getname(query).to_s
i = query
t = "PTR"
else
i = resolver.getaddress(query).to_s
n = query
t = "A"
end
attrs = { :hostname => n, :ip => i, :resolver => resolver, :proxy => proxy }
case t
when "A"
ARecord.new attrs
when "PTR"
PTRRecord.new attrs
end
end
rescue Resolv::ResolvError, SocketError
nil
rescue Timeout::Error => e
raise Net::Error, e
end
class Record < Net::Record
attr_accessor :ip, :resolver, :type
def initialize opts={ }
super(opts)
self.ip = validate_ip self.ip
self.resolver ||= Resolv::DNS.new
end
def destroy
logger.info "Delete the DNS #{type} record for #{to_s}"
end
def create
logger.info "Add DNS #{type} record for #{to_s}"
end
def attrs
raise "Abstract class"
end
def dns_lookup ip_or_name
DNS.lookup(ip_or_name, proxy, resolver)
end
protected
def generate_conflict_error
logger.warn "Conflicting DNS #{type} record for #{to_s} detected"
e = Net::Conflict.new
e.type = "dns"
e.expected = to_s
e.actual = conflicts
e.message = "DNS conflict detected - expected #{to_s}, found #{conflicts.map(&:to_s).join(', ')}"
e
end
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems