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Add missing dtrace probes for received UDP packets.

Description

Add missing dtrace probes for received UDP packets.

Fire UDP receive probes when a packet is received and there is no
endpoint consuming it. Fire the probe also if the TTL of the
received packet is smaller than the minimum required by the endpoint.

Clarify also in the man page, when the probe fires.

Reviewed by: dteske@, markj@, rrs@
Sponsored by: Netflix, Inc.
Differential Revision: https://reviews.freebsd.org/D16046

Details

Committed
tuexenJul 20 2018, 3:32 PM
Differential Revision
D16046: Add UDP receive probes
Parents
rS336550: MFC r336417:
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