Packet Assert Proposal

[Radek Pazdera]

Hi,

I did a series of tests for LNST lately where I needed to check whether 
packets
with some properties left or arrived to some interface. The usual way of 
doing
this is to run tcpdump with some filter, grep the results for the required
properties and see if you get something.

I thought it might be useful to be able to do this natively in LNST. 
Maybe crate
new command type like this:

<command type="packet_assert" timeout="10" bg_id="5">
<option name="interface" value="192.168.1.100" />
<option name="filter" value="igmp" />
<option name="grep_for" value="igmp query v{$igmp_version}" />
<option name="grep_for" value="> {$multiaddr}" />
<option name="min_count" value="5" />
</command>

Do you think it's a good idea or should I do it some other way/not do 
things like
this at all?

We could discuss it together with the previous sysctl proposal if you're 
interested.

Thank you,
Radek Pazdera