I find a lot references of the function neigh_release(), can you direct me to the one that releases a staled arp entry? Thanks.

On Tue, Nov 29, 2016 at 10:40 AM, Shawn Peng <yisupeng@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​

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