IPv4

IPv4

class os_ken.lib.packet.ipv4.ipv4(version=4, header_length=5, tos=0, total_length=0, identification=0, flags=0, offset=0, ttl=255, proto=0, csum=0, src='10.0.0.1', dst='10.0.0.2', option=None)

IPv4 (RFC 791) header encoder/decoder class.

NOTE: When decoding, this implementation tries to decode the upper layer protocol even for a fragmented datagram. It isn't likely what a user would want.

An instance has the following attributes at least. Most of them are same to the on-wire counterparts but in host byte order. IPv4 addresses are represented as a string like '192.0.2.1'. __init__ takes the corresponding args in this order.

Attribute Description Example
version Version  
header_length IHL  
tos Type of Service  
total_length Total Length (0 means automatically-calculate when encoding)  
identification Identification  
flags Flags  
offset Fragment Offset  
ttl Time to Live  
proto Protocol  
csum Header Checksum (Ignored and automatically-calculated when encoding)  
src Source Address '192.0.2.1'
dst Destination Address '192.0.2.2'
option A bytearray which contains the entire Options, or None for no Options  
Creative Commons Attribution 3.0 License

Except where otherwise noted, this document is licensed under Creative Commons Attribution 3.0 License. See all OpenStack Legal Documents.