Method: Inspec::Resources::LsofPorts#lsof_parser

Defined in:
lib/inspec/resources/port.rb

#lsof_parser(lsof_cmd) ⇒ Object

rubocop:disable Metrics/CyclomaticComplexity rubocop:disable Metrics/AbcSize



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# File 'lib/inspec/resources/port.rb', line 201

def lsof_parser(lsof_cmd)
  procs = {}
  # build this with formatted output (-F) from lsof
  # procs = {
  #   '123:sshd' => [
  #      'ipv4:tcp:22:127.0.0.1',
  #      'ipv6:tcp:22:::1',
  #      'ipv4:tcp:*',
  #      'ipv6:tcp:*',
  #   ],
  #   '456:ntpd' => [
  #      'ipv4:udp:123:*',
  #      'ipv6:udp:123:*',
  #   ]
  # }
  proc_id = port_id = nil
  lsof_cmd.stdout.each_line do |line|
    line.chomp!
    key = line.slice!(0)
    case key
    when "p"
      proc_id = line
      port_id = nil
    when "c"
      proc_id += ":" + line
    when "t"
      port_id = line.downcase
    when "P"
      port_id += ":" + line.downcase
    when "n"
      src, dst = line.split("->")

      # skip active comm streams
      next if dst

      host, port = /^(\S+):(\d+|\*)$/.match(src)[1, 2]

      # skip channels from port 0 - what does this mean?
      next if port == "*"

      # create new array stub if !exist?
      procs[proc_id] = [] unless procs.key?(proc_id)

      # change address '*' to zero
      host = port_id =~ /^ipv6:/ ? "[::]" : "0.0.0.0" if host == "*"
      # entrust URI to scrub the host and port
      begin
        uri = URI("addr://#{host}:#{port}")
        uri.host && uri.port
      rescue => e
        warn "could not parse URI 'addr://#{host}:#{port}' - #{e}"
        next
      end

      # e.g. 'ipv4:tcp:22:127.0.0.1'
      #                             strip ipv6 squares for inspec
      port_id += ":" + port + ":" + host.gsub(/^\[|\]$/, "")

      # lsof will give us another port unless it's done
      procs[proc_id] << port_id
    end
  end

  procs
end