packet builder packet size

Hi, I'm trying to use the colasoft free packet builder to generate
a single UDP packet. I'm pressing the add button, choose UDP and
the program adds automatically a 64 bytes packet, while I'd like to have
to possibility to choose the size of the packet. Besides the data content
of the packet seems not changeable: it has an "Extra Data" field all
padded with zeros, while I'd like to modify the data payolad of the packet.
I'm doing something wrong or maybe I'm urting some limitations ?
Thanks a lot for your help
franco

 

Hi Franco,

Yes, the "Packet Length" and "Extra Data" cannot be modified in Decode Editor directly. But you can manual input data to change the length in the Hex Editor.
Hope the tips will be helpful.