#
# Author:: Doug MacEachern <dougm@vmware.com>
# Copyright:: Copyright (c) 2009 VMware, Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

Ohai.plugin(:NetworkListeners) do
  provides "network/listeners"

  depends "network", "counters/network"

  collect_data do
    require 'sigar'
    flags = Sigar::NETCONN_TCP|Sigar::NETCONN_SERVER

    network Mash.new unless network
    listeners = Mash.new

    sigar = Sigar.new
    sigar.net_connection_list(flags).each do |conn|
      port = conn.local_port
      addr = conn.local_address.to_s
      if addr == "0.0.0.0" || addr == "::"
        addr = "*"
      end
      listeners[port] = Mash.new
      listeners[port][:address] = addr
      begin
        pid = sigar.proc_port(conn.type, port)
        # workaround for a failure of proc_state to throw
        # after the first 0 has been supplied to it
        #
        # no longer required when hyperic/sigar#48 is fixed
        throw ArgumentError.new("No such process") if pid == 0
        listeners[port][:pid] = pid
        listeners[port][:name] = sigar.proc_state(pid).name
      rescue
      end
    end

    network[:listeners] = Mash.new
    network[:listeners][:tcp] = listeners
  end
end
