ADAPTERCB
TUNNELCB
VCCB
CONTROLRECEIVED
CONTROLSENT
PAYLOADRECEIVED
PAYLOADSENT
CALLSTATS

BUFFERPOOL
BUFFERBLOCKHEAD
BUFFERHEAD

PACKETPOOL
PACKETBLOCKHEAD
PACKETHEAD

TDIXCONTEXT

TIMERQ
TIMERQITEM

L2TPHEADERINFO
AVPINFO
CONTROLMSGINFO
TUNNELWORK
INCALLSETUP
LINKSTATUSINFO