RFC 8175, "Dynamic Link Exchange Protocol (DLEP)", June 2017

Errata ID: 6472
Status: Verified
Type: Technical
Publication Format(s) : TEXT
Reported By: Rick Taylor
Date Reported: 2021-03-10
Verifier Name: Alvaro Retana
Date Verified: 2022-05-26

Section 12.4, para 2 says:

A Peer Offer Signal MUST be encoded within a UDP packet.  The IP source and destination fields in the packet MUST be set by swapping the values received in the Peer Discovery Signal.  The Peer Offer Signal completes the discovery process; see Section 7.1.

It should say:

A Peer Offer Signal MUST be encoded within a UDP packet. The IP source and destination fields (addresses and ports) in the packet MUST be set by swapping the values received in the Peer Discovery Signal, with the exception that the new source address on the Offer Signal, which was the well-known destination address, becomes a local IP from the DLEP modem. The source port remains the well-known port from the Peer Discovery Signal. The Peer Offer signal contains zero or more connection points as described in 13.2 and 13.3 completes the discovery process; see Section 7.1 

Notes:

The original text will not result in a valid unicast IP packet.

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AD Note: The original text is clearly wrong. There has been discussion in the WG about the proper wording for the "corrected text". Given that the current text results in an invalid packet, I am marking this report as Verified.

https://mailarchive.ietf.org/arch/msg/manet/h8Sa924gn6ZmAZ7XNp-5UUrZlAY/

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