Question about arp caches

[Anupam Kapoor]

On Tue, Nov 29, 2016 at 10:40 AM, Shawn Peng <yisupeng at gmail.com> wrote:

> I'm reading the code about arp protocol. It seems like the kernel uses
> the neigh_table structure to keep track of caches, right?
>
​yes.​



> There should
> be some code that remove the stale entries in the cache, but I didn't
> find the code that does this job. Does anyone have an idea?
>
​look at neigh_release(...) and neigh_destroy(...). basically,
neigh_release(...) decrements the reference count of a neighbor, and
neigh_destroy(...) frees it when this reference count reaches zero.​



​--
kind regards
anupam​


In the beginning was the lambda, and the lambda was with Emacs, and Emacs
was the lambda.
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