[Wifidog] [Fwd: Re: connection problem]

[Thomas Guyot-Sionnest]

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I think the cleanest way is to first check the counters, then check the
local arp, and finally do an arp-request for that address.

Thomas

Mina Naguib wrote:
|
| Another $0.02: If the ICMP thing doesn't fly, we could go a level lower
| by using an ARP ping (who-has 1.2.3.4 ? tell 1.1.1.1).  Dug Song's
| `dsniff` package has a binary called `arping` that does just that - I've
| also seen a similar binary included in the core components of some
| distros (for example net-misc/iputils in gentoo has it)
|
| I don't think any client can refuse to reply to ARP pings, otherwise
| they wouldn't be online in the first place.  Also I don't know of any
| personal windows firewalls that can block those (I believe up to windows
| XP SP2, normal programs did not have access to raw sockets)
|
| Depending on what you find with your testing, I could go through
| arping's code to see how simple it is.  The solution may be as simple as
| having a wifidog thread looping over all connected IPs every X (where X
| is less than the timeout) and arp-pinging them.
|
| Now that I think about it, I don't know if ARP packets would count
| against iptables counters or not, making this entire point moot.
|
| hmmm... will test my theories.



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