[Technical Errata Reported] RFC5858 (2277)

The following errata report has been submitted for RFC5858,
"IPsec Extensions to Support Robust Header Compression over IPsec".

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You may review the report below and at:
http://www.rfc-editor.org/errata_search.php?rfc=5858&eid=2277

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Type: Technical
Reported by: Alfred Hoenes <[email protected]>

Section: 4.2, pg. 7

Original Text
-------------

                BEFORE COMPRESSION AND APPLICATION OF ESP
                ----------------------------
          IPv4  |orig IP hdr  |     |      |
                |(any options)| TCP | Data |
                ----------------------------

                 AFTER ROHCOIPSEC COMPRESSION AND APPLICATION OF ESP
               ------------------------------------------------------
         IPv4  | new IP hdr  |     | Cmpr. |    | ROHC | ESP   | ESP|
               |(any options)| ESP | Hdr.  |Data| ICV  |Trailer| ICV|
               ------------------------------------------------------

   Figure 1.  Example of a ROHCoIPsec-Processed Packet


Corrected Text
--------------

                BEFORE COMPRESSION AND APPLICATION OF ESP
                ----------------------------
          IPv4  |orig IP hdr  |     |      |
                |(any options)| TCP | Data |
                ----------------------------

                 AFTER ROHCOIPSEC COMPRESSION AND APPLICATION OF ESP
               ------------------------------------------------------
         IPv4  | new IP hdr  |     | Cmpr. |    | ROHC | ESP   | ESP|
               |(any options)| ESP | Hdr.  |Data| ICV  |Trailer| ICV|
|              --------------------+===================+-------------

|  Figure 1.  Example of a ROHCoIPsec-Processed Packet ( +=====+ in
|             the diagram indicates the plaintext that undergoes ESP
|             protection; the packet actually contains the ciphertext)


Notes
-----
Rationale:
 The lower part of Figure 1 misrepresents the packet format;
 in the general case (not ESP NULL encryption), the structure
 of the inner part of the ESP tunnel mode packet is hidden by
 encryption.
 The graphical presentation therefore might mislead the reader.
 The suggested Corrected Text tries to avoid this by graphically
 marking this part of the packet and adding a short note that the
 diagram represents the plaintext structure only.

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RFC5858 (draft-ietf-rohc-ipsec-extensions-hcoipsec-08)
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Title               : IPsec Extensions to Support Robust Header Compression over IPsec
Publication Date    : May 2010
Author(s)           : E. Ertekin, C. Christou, C. Bormann
Category            : PROPOSED STANDARD
Source              : Robust Header Compression
Area                : Transport
Stream              : IETF
Verifying Party     : IESG