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Windows 7 Network File Transfer - Verification?

post #1 of 3
7/29/12 at 7:09pm
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When you transfer files between two Windows 7 PCs, does it verify the copy in any way?
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post #2 of 3
7/29/12 at 7:09pm
Quote:
Originally Posted by Oubadah View Post

When you transfer files between two Windows 7 PCs, does it verify the copy in any way?

The SMB protocol can take care of this. smile.gif To some extent anyway...I know the CIFS spec has a write validation flag, but only if the client sets the bits.
http://tools.ietf.org/html/draft-leach-cifs-v1-spec-01#section-4.2.12
Code:

 Client Request                     Description
 ================================== =================================

 UCHAR WordCount;                   Count of parameter words = 3
 USHORT Tid2;                       Second (target) path TID
 USHORT OpenFunction;               What to do if target file exists
 USHORT Flags;                      Flags to control copy operation:
                                     bit 0 - target must be a file
                                     bit 1 - target must be a dir.
                                     bit 2 - copy target mode:
                                     0 = binary, 1 = ASCII
                                     bit 3 - copy source mode:
                                     0 = binary, 1 = ASCII
                                     bit 4 - verify all writes <--------------
                                     bit 5 - tree copy
 USHORT ByteCount;                  Count of data bytes;    min = 2
 UCHAR SourceFileNameFormat;        0x04
 STRING SourceFileName;             Pathname of source file
 UCHAR TargetFileNameFormat;        0x04
 STRING TargetFileName;             Pathname of target file

Does Windows 7 set the flag? I highly doubt it...I guess you'd have to sniff the packet!
Code:
Flags |= 1 << 4;

Edited by tompsonn - 7/29/12 at 7:32pm
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post #3 of 3
7/30/12 at 12:59am
Windows doesn't do any MD5 hash checks but I believe it does do a CRC32 check or some protocol like that
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