Wireshark has an embedded Lua interpreter. Lua is a powerful light-weight
programming language designed for extending applications. Lua is designed
and implemented by a team at PUC-Rio, the Pontifical Catholic University
of Rio de Janeiro in Brazil. Lua was born and raised at Tecgraf, the
Computer Graphics Technology Group of PUC-Rio, and is now housed at Lua.org.
Both Tecgraf and Lua.org are laboratories of the Department of Computer Science.
In Wireshark Lua can be used to write dissectors and taps.
Wireshark's Lua interpreter starts by loading
is located in the global configuration directory of Wireshark.
Lua is disabled by default by setting the variable
to true in
. To enable lua the line that sets that variable
must be removed or commented out.
from the data directory if lua is enabled
Wireshark will try to load a file named
in the user's
The command line option
can be used to
load lua scripts as well.
The Lua code will be executed once after all the protocols have being initialized and before reading