[jcifs] Session Keep-Alive

Allen, Michael B (RSCH) Michael_B_Allen at ml.com
Wed May 15 09:33:20 EST 2002

> -----Original Message-----
> From:	Christopher R.Hertel [SMTP:crh at ubiqx.mn.org]
> Sent:	Tuesday, May 14, 2002 4:40 PM
> To:	Michael B.Allen
> Cc:	jcifs at samba.org
> Subject:	[jcifs] Session Keep-Alive
> Hey Mike,
> Do you (how do you) handle SMB Session keep-alive packets?  At first, I
> didn't see these when I was looking at Ethereal captures, but it seems
> that the (out-of-date) version of Ethereal I was using did not identify
> them the way I expected.  Now I see 'em (since I now know what I'm looking
> for).
	Note, there is one issue with Ethereal that frustrated me to no end one day. Ethereal
	reconstitutes hex output from decomposed messages. I know this because when I fixed
	the SMB URL and send Unicode (UCS-2LE) pathnames they would appear in Ethereal
	as an 8bit encoding. It was very strange. Only when I ran jCIFS log=ALL option did I
	see the real Unicode output. Beware.

> I imagine that, due to the nature of the connections jCIFS makes, we don't
> have to fuss with these much.  Is that true?
	Yes. jCIFS drops keep-alives. See jcifs/netbios/SocketInputStream.java:

	            switch( SessionServicePacket.readPacketType( in, header, 0 )) {
	                case SessionServicePacket.SESSION_KEEP_ALIVE:

	Actually, I don't recall ever seeing a server that sent keep-alives.


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