ICMPv6

class os_ken.lib.packet.icmpv6.echo(id_=0, seq=0, data=None)

ICMPv6 sub encoder/decoder class for Echo Request and Echo Reply messages.

This is used with os_ken.lib.packet.icmpv6.icmpv6 for ICMPv6 Echo Request and Echo Reply messages.

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

id

Identifier

seq

Sequence Number

data

Data
class os_ken.lib.packet.icmpv6.icmpv6(type_=0, code=0, csum=0, data=b'')

ICMPv6 (RFC 2463) 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

type_

Type

code

Code

csum

CheckSum (0 means automatically-calculate when encoding)

data

Payload.

os_ken.lib.packet.icmpv6.echo object, os_ken.lib.packet.icmpv6.nd_neighbor object, os_ken.lib.packet.icmpv6.nd_router_solicit object, os_ken.lib.packet.icmpv6.nd_router_advert object, os_ken.lib.packet.icmpv6.mld object, or a bytearray.
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.icmpv6.mld(maxresp=0, address='::')

ICMPv6 sub encoder/decoder class for MLD Lister Query, MLD Listener Report, and MLD Listener Done messages. (RFC 2710)

http://www.ietf.org/rfc/rfc2710.txt

This is used with os_ken.lib.packet.icmpv6.icmpv6.

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

maxresp

max response time in millisecond. it is meaningful only in Query Message.

address

a group address value.
class os_ken.lib.packet.icmpv6.mldv2_query(maxresp=0, address='::', s_flg=0, qrv=2, qqic=0, num=0, srcs=None)

ICMPv6 sub encoder/decoder class for MLD v2 Lister Query messages. (RFC 3810)

http://www.ietf.org/rfc/rfc3810.txt

This is used with os_ken.lib.packet.icmpv6.icmpv6.

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

maxresp

max response time in millisecond. it is meaningful only in Query Message.

address

a group address value.

s_flg

when set to 1, routers suppress the timer process.

qrv

robustness variable for a querier.

qqic

an interval time for a querier in unit of seconds.

num

a number of the multicast servers.

srcs

a list of IPv6 addresses of the multicast servers.
class os_ken.lib.packet.icmpv6.mldv2_report(record_num=0, records=None)

ICMPv6 sub encoder/decoder class for MLD v2 Lister Report messages. (RFC 3810)

http://www.ietf.org/rfc/rfc3810.txt

This is used with os_ken.lib.packet.icmpv6.icmpv6.

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

record_num

a number of the group records.

records

a list of os_ken.lib.packet.icmpv6.mldv2_report_group. None if no records.
class os_ken.lib.packet.icmpv6.mldv2_report_group(type_=0, aux_len=0, num=0, address='::', srcs=None, aux=None)

ICMPv6 sub encoder/decoder class for MLD v2 Lister Report Group Record messages. (RFC 3810)

This is used with os_ken.lib.packet.icmpv6.mldv2_report.

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_

a group record type for v3.

aux_len

the length of the auxiliary data in 32-bit words.

num

a number of the multicast servers.

address

a group address value.

srcs

a list of IPv6 addresses of the multicast servers.

aux

the auxiliary data.
class os_ken.lib.packet.icmpv6.nd_neighbor(res=0, dst='::', option=None)

ICMPv6 sub encoder/decoder class for Neighbor Solicitation and Neighbor Advertisement messages. (RFC 4861)

This is used with os_ken.lib.packet.icmpv6.icmpv6.

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

res

R,S,O Flags for Neighbor Advertisement. The 3 MSBs of "Reserved" field for Neighbor Solicitation.

dst

Target Address

option

a derived object of os_ken.lib.packet.icmpv6.nd_option or a bytearray. None if no options.
class os_ken.lib.packet.icmpv6.nd_option_pi(length=0, pl=0, res1=0, val_l=0, pre_l=0, res2=0, prefix='::')

ICMPv6 sub encoder/decoder class for Neighbor discovery Prefix Information Option. (RFC 4861)

This is used with os_ken.lib.packet.icmpv6.nd_router_advert.

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

length

length of the option. (0 means automatically-calculate when encoding)

pl

Prefix Length.

res1

L,A,R* Flags for Prefix Information.

val_l

Valid Lifetime.

pre_l

Preferred Lifetime.

res2

This field is unused. It MUST be initialized to zero.

prefix

An IP address or a prefix of an IP address.

*R flag is defined in (RFC 3775)

class os_ken.lib.packet.icmpv6.nd_option_sla(length=0, hw_src='00:00:00:00:00:00', data=None)

ICMPv6 sub encoder/decoder class for Neighbor discovery Source Link-Layer Address Option. (RFC 4861)

This is used with os_ken.lib.packet.icmpv6.nd_neighbor, os_ken.lib.packet.icmpv6.nd_router_solicit or os_ken.lib.packet.icmpv6.nd_router_advert.

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

length

length of the option. (0 means automatically-calculate when encoding)

hw_src

Link-Layer Address. NOTE: If the address is longer than 6 octets this contains the first 6 octets in the address. This implementation assumes the address has at least 6 octets.

data

A bytearray which contains the rest of Link-Layer Address and padding. When encoding a packet, it's user's responsibility to provide necessary padding for 8-octets alignment required by the protocol.
class os_ken.lib.packet.icmpv6.nd_option_tla(length=0, hw_src='00:00:00:00:00:00', data=None)

ICMPv6 sub encoder/decoder class for Neighbor discovery Target Link-Layer Address Option. (RFC 4861)

This is used with os_ken.lib.packet.icmpv6.nd_neighbor.

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

length

length of the option. (0 means automatically-calculate when encoding)

hw_src

Link-Layer Address. NOTE: If the address is longer than 6 octets this contains the first 6 octets in the address. This implementation assumes the address has at least 6 octets.

data

A bytearray which contains the rest of Link-Layer Address and padding. When encoding a packet, it's user's responsibility to provide necessary padding for 8-octets alignment required by the protocol.
class os_ken.lib.packet.icmpv6.nd_router_advert(ch_l=0, res=0, rou_l=0, rea_t=0, ret_t=0, options=None)

ICMPv6 sub encoder/decoder class for Router Advertisement messages. (RFC 4861)

This is used with os_ken.lib.packet.icmpv6.icmpv6.

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

ch_l

Cur Hop Limit.

res

M,O Flags for Router Advertisement.

rou_l

Router Lifetime.

rea_t

Reachable Time.

ret_t

Retrans Timer.

options

List of a derived object of os_ken.lib.packet.icmpv6.nd_option or a bytearray. None if no options.
class os_ken.lib.packet.icmpv6.nd_router_solicit(res=0, option=None)

ICMPv6 sub encoder/decoder class for Router Solicitation messages. (RFC 4861)

This is used with os_ken.lib.packet.icmpv6.icmpv6.

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

res

This field is unused. It MUST be initialized to zero.

option

a derived object of os_ken.lib.packet.icmpv6.nd_option or a bytearray. None if no options.