[Click] DecIPTTL

[Nikola Knežević]

Hi guys,

I have a simple question about Click configurations.

If I have something like this:

FromDevice(ed0) -> Strip(14)
		-> DecIPTTL
		-> ToDevice(ed1);

system crashes in DecIPTTL. In simple_action, ip_header returns 0x0,  
which gets referenced later.

If I change the configuration to:
FromDevice(ed0) -> Strip(14)
		-> CheckIPHeader
		-> DecIPTTL
		-> ToDevice(ed1);

then I don't have any problems. Why is this happening? I assume that  
CheckIPHeader sets the proper field of the Packet, but I don't see why  
Strip doesn't do that.

I'm running Click as a kernel module, on FreeBSD 7.1.

Cheers,
Nikola