Class: Inspec::Resources::LinuxPorts
Overview
extract port information from netstat
Constant Summary
collapse
- ALLOWED_PROTOCOLS =
rubocop:disable Metrics/ClassLength
%w{tcp tcp6 udp udp6}.freeze
Instance Attribute Summary
Attributes inherited from PortsInfo
#inspec
Instance Method Summary
collapse
Methods inherited from PortsInfo
#initialize
Instance Method Details
#info ⇒ Object
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# File 'lib/resources/port.rb', line 270
def info
ports_via_ss || ports_via_netstat
end
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#parse_net_address(net_addr, protocol) ⇒ Object
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# File 'lib/resources/port.rb', line 308
def parse_net_address(net_addr, protocol)
if protocol.eql?('tcp6') || protocol.eql?('udp6')
ip6 = /^(\S+):(\d+)$/.match(net_addr)
ip6addr = ip6[1]
ip6addr = '::' if ip6addr =~ /^:::$/
ip6addr += ':' if ip6addr =~ /\w:$/
begin
ip_parser = IPAddr.new(ip6addr)
rescue IPAddr::InvalidAddressError
return [nil, nil]
end
if ip_parser.ipv4?
ip_addr = URI("addr://#{ip6addr}:#{ip6[2]}")
host = ip_addr.host
else
ip_addr = URI("addr://[#{ip6addr}]:#{ip6[2]}")
host = ip_addr.host[1..ip_addr.host.size-2]
end
else
ip_addr = URI('addr://'+net_addr)
host = ip_addr.host
end
port = ip_addr.port
[host, port]
rescue URI::InvalidURIError => e
warn "Could not parse #{net_addr}, #{e}"
nil
end
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#parse_netstat_line(line) ⇒ Object
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# File 'lib/resources/port.rb', line 359
def parse_netstat_line(line)
parsed = /^(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)?\s+(\S+)\s+(\S+)\s+(\S+)/.match(line)
return {} if parsed.nil? || line.match(/^proto/i)
protocol = parsed[1].downcase
protocol += '6' if parsed[4].count(':') > 1 && %w{tcp udp}.include?(protocol)
host, port = parse_net_address(parsed[4], protocol)
return {} if host.nil?
process = parsed[9].split('/')
pid = process[0]
pid = pid.to_i if pid =~ /^\d+$/
process = process[1]
{
'port' => port,
'address' => host,
'protocol' => protocol,
'process' => process,
'pid' => pid,
}
end
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#parse_ss_line(line) ⇒ Object
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# File 'lib/resources/port.rb', line 390
def parse_ss_line(line)
parsed = line.split(/\s+/, 7)
process_info = parsed[6]
protocol = parsed[0]
protocol += '6' if process_info.include?('v6only:1')
return nil unless ALLOWED_PROTOCOLS.include?(protocol)
parsed_net_address = parsed[4].match(/(\S+):(\*|\d+)$/)
return nil if parsed_net_address.nil?
host = parsed_net_address[1]
port = parsed_net_address[2]
return nil if host.nil? && port.nil?
port = port.to_i
host.delete!('::ffff:') if host.start_with?('::ffff:')
host = host.split('%').first
host = '0.0.0.0' if host == '*'
process_match = parsed[6].match(/users:\(\(\"(\S+)\"/)
process = process_match.nil? ? nil : process_match[1]
pid_match = parsed[6].match(/pid=(\d+)/)
pid = pid_match.nil? ? nil : pid_match[1].to_i
{
'port' => port,
'address' => host,
'protocol' => protocol,
'process' => process,
'pid' => pid,
}
end
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#ports_via_netstat ⇒ Object
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# File 'lib/resources/port.rb', line 290
def ports_via_netstat
return nil unless inspec.command('netstat').exist?
cmd = inspec.command('netstat -tulpen')
return nil unless cmd.exit_status.to_i.zero?
ports = []
cmd.stdout.each_line do |line|
port_info = parse_netstat_line(line)
next unless %w{tcp tcp6 udp udp6}.include?(port_info['protocol'])
ports.push(port_info)
end
ports
end
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#ports_via_ss ⇒ Object
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# File 'lib/resources/port.rb', line 274
def ports_via_ss
return nil unless inspec.command('ss').exist?
cmd = inspec.command('ss -tulpen')
return nil unless cmd.exit_status.to_i.zero?
ports = []
cmd.stdout.each_line do |line|
parsed_line = parse_ss_line(line)
ports << parsed_line unless parsed_line.nil?
end
ports
end
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