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class DnsPlugin < Plugin
require 'resolv'
def gethostname(address)
Resolv.getname(address)
end
def getaddresses(name)
Resolv.getaddresses(name)
end
def help(plugin, topic="")
"dns <hostname|ip> => show local resolution results for hostname or ip address"
end
def name_to_ip(m, params)
begin
a = getaddresses(params[:host])
if a.length > 0
m.reply m.params + ": " + a.join(", ")
else
m.reply "#{params[:host]}: not found"
end
rescue StandardError => err
m.reply "#{params[:host]}: not found"
end
end
def ip_to_name(m, params)
begin
a = gethostname(params[:ip])
m.reply m.params + ": " + a if a
rescue StandardError => err
m.reply "#{params[:ip]}: not found (does not reverse resolve)"
end
end
end
plugin = DnsPlugin.new
plugin.map 'dns :ip', :action => 'ip_to_name', :thread => true,
:requirements => {:ip => /^\d+\.\d+\.\d+\.\d+$/}
plugin.map 'dns :host', :action => 'name_to_ip', :thread => true
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