Hi!

I have a problem with kernel's behavior when receiving ESP/AH packets
with unknown SPI values.

As it turns out, when such a packet arrives, kernel simply discards it.
The consequence is that in some tests first packet is lost. For example,
trying to ping other side the 0th packet will be sent, but all the
others will go alright. In other words, there is basically a race
between ICMP packet coming to machine, and IKE daemon on that machine
that is installing SAs.

Am I right? Can anything be done about it?

Furthermore, if we assume that the answer to previous question is
positive, then kernel upon receiving ESP/AH packet with unknown SPI
values could also send ACQUIRE message to all listening KM processes.
What is design rationale against such behavior?

Thanks in advance,
Stjepan Gros

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