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On 08/10/2025 18:53, Guy Harris wrote:
> On Oct 8, 2025, at 8:18 AM, Michael Richardson <[email protected]> wrote:
>
>> [email protected] wrote:
>>
>>> Transport protocols are extended through the use of transport header
>>> options. This document updates RFC 768 (UDP) by indicating the
>>> location, syntax, and semantics for UDP transport layer options
>>> within the surplus area after the end of the UDP user data but before
>>> the end of the IP datagram.
>
> OK, so does this finally make the Length field in the UDP header serve a
> useful purpose, or was there a purpose for it *before* this that I didn't
> know about?
One example on network stacks: Linux, net/ipv4/udp.c and net/ipv6/udp.c: length
checks.
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