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we got an ACK for a message we don't know about. What do we do? #76

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cakekindel opened this issue May 1, 2022 · 3 comments
Open

we got an ACK for a message we don't know about. What do we do? #76

cakekindel opened this issue May 1, 2022 · 3 comments
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rfc7252

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@cakekindel
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@cakekindel cakekindel changed the title What should we do when we recieve an ACK for a message we don't understand? we got an ACK for a message we don't know about. What do we do? May 1, 2022
@cakekindel cakekindel added this to the rfc7252 milestone May 12, 2022
@cakekindel
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it would probably be most correct to respond with reset

@chrysn
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chrysn commented Sep 20, 2022

No, RST are only sent to respond do CON and maybe NON, quoting RFC752:

Rejecting an Acknowledgement or Reset message (including the case where the
Acknowledgement carries a request or a code with a reserved class, or
the Reset message is not Empty) is effected by silently ignoring it.
More generally, recipients of Acknowledgement and Reset messages MUST
NOT respond with either Acknowledgement or Reset messages.

@cakekindel
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ah thank you! good callout

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