[lwip-devel] Re: [lwip-users] Re: [bug #25940] Regarding the Fragmentation issue in the ICMP packet.

[arun kumar]

Hi Actually i have observed the following thing when the ICMP pakcet arrives.

 

I am sending the 1473 packet size and this will be splitted and sent to my target. The first packet is recieved by the LWIP stack and adds to the  "reassdatagrams" and goes out fine.

Next comes the another packet, here also it checks whether the packet is end of the fragmented message and it finds it is end of fragmented messsage and trying to reassemble both of the packets. During the process of refragmentation it is going to Assert stattement. I have attached the picture please verify this .

 

Thanks

With Regards

Arun

On Sun, Mar 22, 2009 at 2:27 PM, address@hidden <address@hidden> wrote:

arun kumar wrote:

Hi Can any body .. answer me for this query that i have posted..
I have treied increasing the IP_REASS_MAX_PBUFS and the PBUF_POOL_SIZE but it didnt work out. It is always going to Assert statement in pbuf_header in pbuf.c at line

Since pbuf_header is called multiple times while the fragmented icmp packet is received, it would be very useful to know at which point it is called when it asserts. For example, we don't know if this is a problem with icmp packets only or with all fragmented IP packets. We'll need more info to help you.


Simon


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