This is a bug in libpcap or netlib or something like that. We ran into this ages ago and fixed it before compile.

On 12/15/2010 11:24 AM, Виноградов Юрий wrote:

Hello everyone!

I have an error in checksum field in first UDP-fragment, when I try to make fragmentation my one UDP datagram.

As I know, the checksum original UDP datagram must be the same as checksum fragmented UDP datagram, but I get different L

my script is:

tcprewrite --fragroute=frag.cfg --infile=1udp.pcap --outfile=1udp_frag.pcap

my frag.cfg contains:

ip_frag 1000

1udp.pcap is ~1300 bytes long

Can anyone help me or had the same problem?

Thank you!


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