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Title : Extended ICMP to Support Multi-part Messages
Author(s) : R. Bonica, et al.
Filename : draft-bonica-internet-icmp-15.txt
Pages : 22
Date : 2007-1-29
This document redefines selected ICMP messages to support multi-part
operation. A multi-part ICMP message carries all of the information
that ICMP messages carried previously, as well as additional
information that applications may require.
Multi-part messages are supported by an ICMP 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 the above mentioned ICMP messages by
specifying a length attribute. All of the currently defined ICMP
messages to which an extension structure can be appended include an
"original datagram" field. The "original datagram" field contains
the initial octets of the datagram that elicited the ICMP error
message. 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.
This memo updates RFC 792 and RFC 4443.
A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-bonica-internet-icmp-15.txt
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