ARP Changes

[Li, Qing]

I have committed the fix into the -current branch, svn r198111.
Please give it a try and I plan to MFC the patch into 8.0 release branch
in 3 days.

Thank you for the report.

-- Qing


-----Original Message-----
From: owner-freebsd-current at freebsd.org on behalf of Li, Qing
Sent: Wed 10/14/2009 6:12 PM
To: lab at gta.com; qingli at freebsd.org
Cc: freebsd-net at freebsd.org; freebsd-current at freebsd.org
Subject: Re: ARP Changes
 

>
> I know that arp has changed a lot in FreeBSD 8.  I am wondering if one
> change was by design?  In older versions of FreeBSD, if you ping a host
> that is on a local network but is down, after a few seconds ping displays:
>	ping: sendto: Host is down
>	ping: sendto: Host is down
>

  This turned out to be a regression bug. A wrong variable is used and
  the incomplete entry was timing out too fast. So the ARP probe continues
  indefinitely ...
  
>
> Using arp to display the arp table shows:
>
>	host.domain (x.x.x.x) at (incomplete) on em0 [ethernet]

  I wasn't returning incomplete entries, but now I am ...

  I have a patch for both issues, but I need to clean up the code
  because that wrong variable is used elsewhere in the same module.

  I should be able to commit a permanent fix by tomorrow.

  -- Qing

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