Packet Base Class¶

class os_ken.lib.packet.packet_base.PacketBase¶

A base class for a protocol (ethernet, ipv4, ...) header.

classmethod get_packet_type(type_)¶

Per-protocol dict-like get method.

Provided for convenience of protocol implementers. Internal use only.

classmethod parser(buf)¶

Decode a protocol header.

This method is used only when decoding a packet.

Decode a protocol header at offset 0 in bytearray buf. Returns the following three objects.

• An object to describe the decoded header.
• A packet_base.PacketBase subclass appropriate for the rest of the packet. None when the rest of the packet should be considered as raw payload.
• The rest of packet.

classmethod register_packet_type(cls_, type_)¶

Per-protocol dict-like set method.

Provided for convenience of protocol implementers. Internal use only.

serialize(payload, prev)¶

Encode a protocol header.

This method is used only when encoding a packet.

Encode a protocol header. Returns a bytearray which contains the header.

payload is the rest of the packet which will immediately follow this header.

prev is a packet_base.PacketBase subclass for the outer protocol header. prev is None if the current header is the outer-most. For example, prev is ipv4 or ipv6 for tcp.serialize.