IPv6

IPv6

class os_ken.lib.packet.ipv6.auth(nxt=6, size=2, spi=0, seq=0, data=b'x00x00x00x00')

IP Authentication header (RFC 2402) encoder/decoder class.

This is used with os_ken.lib.packet.ipv6.ipv6.

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
nxt Next Header
size the length of the Authentication Header in 64-bit words, subtracting 1.
spi security parameters index.
seq sequence number.
data authentication data.
class os_ken.lib.packet.ipv6.dst_opts(nxt=6, size=0, data=None)

IPv6 (RFC 2460) destination header encoder/decoder class.

This is used with os_ken.lib.packet.ipv6.ipv6.

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
nxt Next Header
size the length of the destination header, not include the first 8 octet.
data IPv6 options.
class os_ken.lib.packet.ipv6.fragment(nxt=6, offset=0, more=0, id_=0)

IPv6 (RFC 2460) fragment header encoder/decoder class.

This is used with os_ken.lib.packet.ipv6.ipv6.

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
nxt Next Header
offset offset, in 8-octet units, relative to the start of the fragmentable part of the original packet.
more 1 means more fragments follow; 0 means last fragment.
id_ packet identification value.
class os_ken.lib.packet.ipv6.header(nxt)

extension header abstract class.

class os_ken.lib.packet.ipv6.hop_opts(nxt=6, size=0, data=None)

IPv6 (RFC 2460) Hop-by-Hop Options header encoder/decoder class.

This is used with os_ken.lib.packet.ipv6.ipv6.

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
nxt Next Header
size the length of the Hop-by-Hop Options header, not include the first 8 octet.
data IPv6 options.
class os_ken.lib.packet.ipv6.ipv6(version=6, traffic_class=0, flow_label=0, payload_length=0, nxt=6, hop_limit=255, src='10::10', dst='20::20', ext_hdrs=None)

IPv6 (RFC 2460) 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. IPv6 addresses are represented as a string like 'ff02::1'. __init__ takes the corresponding args in this order.

Attribute Description Example
version Version  
traffic_class Traffic Class  
flow_label When decoding, Flow Label. When encoding, the most significant 8 bits of Flow Label.  
payload_length Payload Length  
nxt Next Header  
hop_limit Hop Limit  
src Source Address 'ff02::1'
dst Destination Address '::'
ext_hdrs Extension Headers  
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.
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.

class os_ken.lib.packet.ipv6.opt_header(nxt, size, data)

an abstract class for Hop-by-Hop Options header and destination header.

class os_ken.lib.packet.ipv6.option(type_=0, len_=-1, data=None)

IPv6 (RFC 2460) Options header encoder/decoder class.

This is used with os_ken.lib.packet.ipv6.hop_opts or
os_ken.lib.packet.ipv6.dst_opts.

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
type_ option type.
len_ the length of data. -1 if type_ is 0.
data an option value. None if len_ is 0 or -1.
class os_ken.lib.packet.ipv6.routing(nxt)

An IPv6 Routing Header decoder class. This class has only the parser method.

IPv6 Routing Header types.

http://www.iana.org/assignments/ipv6-parameters/ipv6-parameters.xhtml

Value Description Reference
0 Source Route (DEPRECATED) [[IPV6]][RFC5095]
1 Nimrod (DEPRECATED 2009-05-06)  
2 Type 2 Routing Header [RFC6275]
3 RPL Source Route Header [RFC6554]
4 - 252 Unassigned  
253 RFC3692-style Experiment 1 [2] [RFC4727]
254 RFC3692-style Experiment 2 [2] [RFC4727]
255 Reserved  
class os_ken.lib.packet.ipv6.routing_type3(nxt=6, size=0, type_=3, seg=0, cmpi=0, cmpe=0, adrs=None)

An IPv6 Routing Header for Source Routes with the RPL (RFC 6554) encoder/decoder class.

This is used with os_ken.lib.packet.ipv6.ipv6.

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
nxt Next Header
size The length of the Routing header, not include the first 8 octet. (0 means automatically-calculate when encoding)
type Identifies the particular Routing header variant.
seg Number of route segments remaining.
cmpi Number of prefix octets from segments 1 through n-1.
cmpe Number of prefix octets from segment n.
pad Number of octets that are used for padding after Address[n] at the end of the SRH.
adrs Vector of addresses, numbered 1 to n.
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.