As JavaFan has said that should be 'n', not 'v'. If IDs in script and terminal are different, then how do you know that you captured the right packet? Why do you assigning decoded UDP packet to $udp_packet variable, but getting $payload from $udp_obj? Are you using strict and warnings? Could you post packet data and actual script that we could run?

See also How do I post a question effectively?

In reply to Re^3: Disassembling DNS Packet by zwon
in thread Disassembling DNS Packet by mpapet

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