Enum PacketDirection 

pub enum PacketDirection {
    Upwards,
    Downwards,
}

Represents the direction of a packet in a flow.

Direction is determined from the perspective of the client-server model:

• Upwards: From client to server (request/query/initiator)
• Downwards: From server to client (response/reply)

For stateless analysis (mid-connection packets), the first packet seen is assumed to be from the initiator and therefore Upwards.

Variants

Upwards

Downwards

Implementations

impl PacketDirection

pub fn infer(pkt: &Packet<'_>) -> PacketDirection

Infers the direction of a packet based on transport layer information.

This method determines if a packet is Upwards (Client -> Server) or Downwards (Server -> Client) using:

• TCP: Analysis of SYN/SYN-ACK flags and well-known ports.
• UDP: Well-known ports (DNS, DHCP, NTP) and lightweight payload inspection (DPI Lite).
• ICMP: Message types (e.g., Echo Request vs Echo Reply).

If the direction cannot be definitively determined, it defaults to Upwards.

Trait Implementations

impl Clone for PacketDirection

fn clone(&self) -> PacketDirection

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for PacketDirection

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for PacketDirection

fn default() -> PacketDirection

Returns the “default value” for a type.

impl Display for PacketDirection

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for PacketDirection

fn eq(&self, other: &PacketDirection) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for PacketDirection

impl Eq for PacketDirection

impl StructuralPartialEq for PacketDirection