XML Dissection in Wireshark

[<upendra.allu () wipro com>]

Hello,

I have some queries regarding XML data dissection in Wireshark.
Right now all the protocols in Wireshark can be dissected using "pcap" files.

Now I have a requirement to use XML data to dissect some of the(ranap, mtp3 etc..) Wireshark protocols. after doing 
some investigation, I found that in order to dissect xml data, separate dtd files need to be written for all the 
required plug-ins. Which are similar to the files in "dtds" directory in Wireshark source code. Once after that I have 
to integrate the dtd files into wireshark code so as to make them to dissect XML data. now the following are my queries.

1. How to write a DTD file for a protocol? (is there any standard format for that? if so, can any one please let me 
know?)
2. Once after writing the DTD file, how to integrate the file into wireshark base code? (is the normal source code 
compilation is enough? I don't think it will be enough as it is separate file format in wireshark)
3. what additional changes are required for this in the wireshark?
4. Finally, is my above approach for dissecting XML data is correct?
If any one worked in above type of requirement please help me.

Regards,
Upendra


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