A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Redefining Selected ICMP Messages To Include
a Length Attribute and an Extension Structure
Author(s) : R. Bonica, et al.
Filename : draft-bonica-internet-icmp-03.txt
Pages : 19
Date : 2006-3-30
This document redefines selected ICMPv4 messages to include an
extension structure. The extension structure is situated at the end
of the ICMP message. It includes an extension header followed by one
or more extension objects. Each extension object contains an object
header and object payload. All object headers share a common format.
This document further redefines a subset of the above mentioned ICMP
messages by specifying a length attribute. Many of the ICMP messages
to which an extension structure can be appended include and "original
datagram" field. The "original datagram" field contains the initial
octets of the datagram to which the ICMP message is a response.
Although the original datagram field is of variable length, the ICMP
message does not include a field that specifies its length.
Therefore, in order to facilitate message parsing, this draft
allocates eight previously reserved bits to reflect the length of the
"original datagram" field.
Finally, this document addresses backwards compatibility issues.
This document requires backwards compatibility with RFC 792 and RFC
1812 compliant ICMP implementations.
A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-bonica-internet-icmp-03.txt
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