If this value is zero, tracing is turned off.
If it has any other value, tracing is turned on at the specified level.
The higher the value, the more detail. A higher level includes all lower
levels of tracing. Currently there are two levels of detail:
Display packet creation and parsing.
Display hex dump of incoming and outgoing DPI packets.
Description
The DPIdebug() function turns DPI internal debugging/tracing on or off.