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[lwip-devel] [task #14273] Use nd6_reachability_hint()?
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From: |
Ivan Delamer |
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Subject: |
[lwip-devel] [task #14273] Use nd6_reachability_hint()? |
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Date: |
Tue, 20 Dec 2016 16:47:16 +0000 (UTC) |
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User-agent: |
Mozilla/5.0 (Windows NT 10.0; WOW64; rv:50.0) Gecko/20100101 Firefox/50.0 |
Follow-up Comment #1, task #14273 (project lwip):
Some background on this function:
Each IPv6 neighbour has a reachability timer. When it expires, reachability
needs to be confirmed.
Reachability is only confirmed when it is validated in both directions. ND6 NS
and NA messages are used for this purpose.
Instead of sending ND6 messages for this purpose, it is acceptable to use an
upper-layer indication that the neighbour is reachable.
The TCP layer is the recommended way to do it. A TCP ACK is considered a
suitable hint of reachability. Then the reachable timer for that neighbor can
be reset.
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