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Wireshark-bugs: [Wireshark-bugs] [Bug 2580] invalid checksum in udp header

Date: Mon, 2 Jun 2008 16:47:50 -0700 (PDT)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=2580





--- Comment #6 from robert trout <rtrout@xxxxxxxxxxxxxxxxx>  2008-06-02 16:47:48 PDT ---
Thanks for the reply:

 i finally got to the bottom of this problem over the weekend, exactly as 
 you diagnosed.
 The issue was not setting udp->length == sizeof(payload) + 
 sizeof(udp_header) in udp->length field.
 I had misread the specification and had a variety of wacky numbers for 
 udp->length.
 Predictably, i had other strange problems with the length of the payload 
 delivered at the receiving end.

 Once this was corrected, all the problems went away. In particular, there 
 are no cases in which Wire Shark calculates the a value different from 
 the one i calculate, or that fails to get delivered to Windows. That 
 suspicion of an incorrect value in Wire Shark was the original reason for 
 emailing.

 Thank you for the prompt response; i did get it yesterday, but wanted to 
 finish testing before i clogged up the airwaves with erroneous 
 experimental data.

 rt
INVALID


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