Sha256: 893a0166556033e1bc03429218a5596e1b14863a55861a68f8dbe8767feb507d
Contents?: true
Size: 1.78 KB
Versions: 10
Compression:
Stored size: 1.78 KB
Contents
# frozen_string_literal: true
# This file is part of PacketGen
# See https://github.com/sdaubert/packetgen for more informations
# Copyright (C) 2016 Sylvain Daubert <sylvain.daubert@laposte.net>
# This program is published under MIT license.
module PacketGen
module Header
# ICMPv6 header ({https://tools.ietf.org/html/rfc4443 RFC 4443})
# 0 1 2 3
# 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
# +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
# | Type | Code | Checksum |
# +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
# A ICMPv6 header consists of:
# * a +type+ field ({Types::Int8} type),
# * a +code+ field ({Types::Int8} type),
# * a +checksum+ field ({Types::Int16} type),
# * and a +body+.
#
# == Create a ICMPv6 header
# # standalone
# icmpv6 = PacketGen::Header::ICMPv6.new
# # in a packet
# pkt = PacketGen.gen('IPv6').add('ICMPv6')
# # access to ICMPv6 header
# pkt.icmpv6 # => PacketGen::Header::ICMPv6
#
# == ICMPv6 attributes
# icmpv6.code = 0
# icmpv6.type = 200
# icmpv6.checksum = 0x248a
# icmpv6.body.read 'this is a body'
# @author Sylvain Daubert
class ICMPv6 < ICMP
# ICMPv6 internet protocol number
IP_PROTOCOL = 58
# Compute checksum and set +checksum+ field
# @return [Integer]
def calc_checksum
sum = ip_header(self).pseudo_header_checksum
sum += self.sz
sum += IP_PROTOCOL
sum += IP.sum16(self)
self.checksum = IP.reduce_checksum(sum)
end
end
self.add_class ICMPv6
IPv6.bind ICMPv6, next: ICMPv6::IP_PROTOCOL
end
end
Version data entries
10 entries across 10 versions & 1 rubygems