Opened 13 years ago
Closed 13 years ago
#8032 closed defect (fixed)
Protocol violation: PDUTYPE2_SYNCHRONIZE, versionLow MUST be 1 but is 0
| Reported by: | kiilerix | Owned by: | |
|---|---|---|---|
| Component: | RDP | Version: | VirtualBox 4.0.0 |
| Keywords: | Cc: | ||
| Guest type: | other | Host type: | other |
Description
VirtualBox will occasionally send (keep-alive?) packages with a (decrypted) content of
16 00 07 00 00 00 00 00 00 00 00 00 04 00 1f 00 00 00 00 00 00 00
where 7 = PDUTYPE_DATAPDU, versionLow = 0, versionHigh = 0, uncompressedlength = 4, streamid = 0, 1f = PDUTYPE2_SYNCHRONIZE, and messageType = 0.
BUT http://msdn.microsoft.com/en-us/library/cc240576 says that versionLow "MUST be set to TS_PROTOCOL_VERSION (0x1)", and the 3rd byte should thus have been 17.
AND messageType in TS_SYNCHRONIZE_PDU is 0 despite http://msdn.microsoft.com/en-us/library/cc240490 says "This field MUST be set to SYNCMSGTYPE_SYNC (1)."
It seems like it isn't a SYNCHRONIZE at all, but AFAICS it can't be anything else.
("All" other similar packages before this are fine - I do for example see another synchronize package as:
16 00 17 00 00 00 00 00 00 00 00 01 16 00 1f 00 00 00 01 00 00 00 )
This violation of the specification prevents interoperability with more standard compliant clients.
VirtualBox-4.0-4.0.0_69151_fedora14-1.i686 Oracle_VM_VirtualBox_Extension_Pack-4.0.0-69151.vbox-extpack
Will be fixed in next VBox release.
The packet is indeed sent as a keep alive message.