View Source
const (
	// UDPConnStateTTL is the maximum time a udp connection state is held.
	UDPConnStateTTL = 72 * time.Hour

	// UDPConnStateShortenedTTL is a shortened maximum time a udp connection state is held, if there more entries than defined by AggressiveCleaningThreshold.
	UDPConnStateShortenedTTL = 3 * time.Hour

	// AggressiveCleaningThreshold defines the soft limit of udp connection state held per udp socket.
	AggressiveCleaningThreshold = 256
View Source
const (
	// UDPConnectionTTL defines the duration after which unseen UDP connections are regarded as ended.
	UDPConnectionTTL = 10 * time.Minute


View Source
var (
	ErrConnectionNotFound = errors.New("could not find connection in system state tables")
	ErrPIDNotFound        = errors.New("could not find pid for socket inode")



    func CleanUDPStates

    func CleanUDPStates(_ context.Context)

      CleanUDPStates cleans the udp connection states which save connection directions.

      func Exists

      func Exists(pktInfo *packet.Info, now time.Time) (exists bool)

        Exists checks if the given connection is present in the system state tables.

        func Lookup

        func Lookup(pktInfo *packet.Info, fast bool) (pid int, inbound bool, err error)

          Lookup looks for the given connection in the system state tables and returns the PID of the associated process and whether the connection is inbound.


          type Info

          type Info struct {
          	TCP4Connections []*socket.ConnectionInfo
          	TCP4Listeners   []*socket.BindInfo
          	TCP6Connections []*socket.ConnectionInfo
          	TCP6Listeners   []*socket.BindInfo
          	UDP4Binds       []*socket.BindInfo
          	UDP6Binds       []*socket.BindInfo

            Info holds network state information as provided by the system.

            func GetInfo

            func GetInfo() *Info

              GetInfo returns all system state tables. The returned data must not be modified.