Re: [RFC] Allow ipv6 proxies and arp proxies be shown with ip

From: Alexey Kuznetsov <redacted>
Date: Thu, 26 Jan 2012 02:59:31 +0400

I see two variants:

1. On request to list proxy entries, ip utility could send request containing
   full ndmsg with NTF_PROXY set in ndm_flags. When kernel sees request without NTF_PROXY,
   it dumps normal neighbor table. When it sees NTF_PROXY, it dumps proxy table instead.

   From user viewpoint, "ip neigh list ..." works as usual, "ip neigh list proxy ..." will list
   proxy entries.

2. Adding RTM_*PNEIGH and the whole new set of "ip pneigh ..." commands.
   Logically, I would prefer this solution and, unless I was lazy 10 years ago, I would
   go this way. Unfortunately, this will break compatibility with existing
   "ip neigh add/del proxy ...", so that the kludge to intercept NTF_PROXY command in RTM_*NEIGH
   is still required and the solution loses half of its beauty.

So, seems #1 looks better.

Agreed.