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# $Id: icmp6.py 23 2006-11-08 15:45:33Z dugsong $
# -*- coding: utf-8 -*-
"""Internet Control Message Protocol for IPv6."""
from __future__ import absolute_import
from . import dpkt
ICMP6_DST_UNREACH = 1 # dest unreachable, codes:
ICMP6_PACKET_TOO_BIG = 2 # packet too big
ICMP6_TIME_EXCEEDED = 3 # time exceeded, code:
ICMP6_PARAM_PROB = 4 # ip6 header bad
ICMP6_ECHO_REQUEST = 128 # echo service
ICMP6_ECHO_REPLY = 129 # echo reply
MLD_LISTENER_QUERY = 130 # multicast listener query
MLD_LISTENER_REPORT = 131 # multicast listener report
MLD_LISTENER_DONE = 132 # multicast listener done
# RFC2292 decls
ICMP6_MEMBERSHIP_QUERY = 130 # group membership query
ICMP6_MEMBERSHIP_REPORT = 131 # group membership report
ICMP6_MEMBERSHIP_REDUCTION = 132 # group membership termination
ND_ROUTER_SOLICIT = 133 # router solicitation
ND_ROUTER_ADVERT = 134 # router advertisement
ND_NEIGHBOR_SOLICIT = 135 # neighbor solicitation
ND_NEIGHBOR_ADVERT = 136 # neighbor advertisement
ND_REDIRECT = 137 # redirect
ICMP6_ROUTER_RENUMBERING = 138 # router renumbering
ICMP6_WRUREQUEST = 139 # who are you request
ICMP6_WRUREPLY = 140 # who are you reply
ICMP6_FQDN_QUERY = 139 # FQDN query
ICMP6_FQDN_REPLY = 140 # FQDN reply
ICMP6_NI_QUERY = 139 # node information request
ICMP6_NI_REPLY = 140 # node information reply
ICMP6_MAXTYPE = 201
class ICMP6(dpkt.Packet):
"""Internet Control Message Protocol for IPv6.
Internet Control Message Protocol version 6 (ICMPv6) is the implementation of the Internet Control Message Protocol
(ICMP) for Internet Protocol version 6 (IPv6). ICMPv6 is an integral part of IPv6 and performs error reporting
and diagnostic functions.
Attributes:
__hdr__: Header fields of ICMPv6.
type: (int): Type. Control messages are identified by the value in the type field. (1 byte)
code: (int): Code. The code field gives additional context information for the message. (1 byte)
sum: (int): Checksum. ICMPv6 provides a minimal level of message integrity verification. (2 bytes)
"""
__hdr__ = (
('type', 'B', 0),
('code', 'B', 0),
('sum', 'H', 0)
)
class Error(dpkt.Packet):
__hdr__ = (('pad', 'I', 0), )
def unpack(self, buf):
dpkt.Packet.unpack(self, buf)
from . import ip6
self.data = self.ip6 = ip6.IP6(self.data)
class Unreach(Error):
pass
class TooBig(Error):
__hdr__ = (('mtu', 'I', 1232), )
class TimeExceed(Error):
pass
class ParamProb(Error):
__hdr__ = (('ptr', 'I', 0), )
class Echo(dpkt.Packet):
__hdr__ = (('id', 'H', 0), ('seq', 'H', 0))
_typesw = {1: Unreach, 2: TooBig, 3: TimeExceed, 4: ParamProb, 128: Echo, 129: Echo}
def unpack(self, buf):
dpkt.Packet.unpack(self, buf)
try:
self.data = self._typesw[self.type](self.data)
setattr(self, self.data.__class__.__name__.lower(), self.data)
except (KeyError, dpkt.UnpackError):
pass
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