VLAN¶

class os_ken.lib.packet.vlan.svlan(pcp=0, cfi=0, vid=0, ethertype=33024)¶

S-VLAN (IEEE 802.1ad) header encoder/decoder class.

An instance has the following attributes at least. Most of them are same to the on-wire counterparts but in host byte order. __init__ takes the corresponding args in this order.

Attribute	Description
pcp	Priority Code Point
cfi	Canonical Format Indicator. In a case to be used as B-TAG, this field means DEI(Drop Eligible Indication).
vid	VLAN Identifier
ethertype	EtherType

classmethod get_packet_type(type_)¶

Per-protocol dict-like get method.

Provided for convenience of protocol implementers. Internal use only.

class os_ken.lib.packet.vlan.vlan(pcp=0, cfi=0, vid=0, ethertype=2048)¶

VLAN (IEEE 802.1Q) header encoder/decoder class.

An instance has the following attributes at least. Most of them are same to the on-wire counterparts but in host byte order. __init__ takes the corresponding args in this order.

Attribute	Description
pcp	Priority Code Point
cfi	Canonical Format Indicator
vid	VLAN Identifier
ethertype	EtherType

classmethod get_packet_type(type_)¶

Override method for the Length/Type field (self.ethertype). The Length/Type field means Length or Type interpretation, same as ethernet IEEE802.3. If the value of Length/Type field is less than or equal to 1500 decimal(05DC hexadecimal), it means Length interpretation and be passed to the LLC sublayer.