The Next Generation display numbers

Michael Ossmann michael.ossmann "at" alttech.com
Wed, 20 Mar 2002 21:35:12 +0000


On Wed, Mar 20, 2002 at 01:59:07PM -0500, Alex K. Angelopoulos wrote:
> Going one step further, it might be nice if the next
> generation could also respond to HTTP queries on the same port by
> attempting to serve an applet - assuming that would not introduce
> excessive complexity  or security issues into the server side of the
> connection.

Actually, it has already been done:

http://home.earthlink.net/~jknapka/vncpatch.html

At the beginning of a TCP stream, RFB clients wait for the server to
send a version string whereas HTTP servers wait for a client to send a
query string.  With the above patch, the VNC server waits for a HTTP
query from the client for a short time.  If it times out (2 seconds,
IIRC) then the server sends the RFB version and so forth.  It adds a
small delay to the very beginning of the RFB session, but it could be
pretty handy.  Tarantella does a similar thing for their firewall
traversal feature.

-- 
Mike Ossmann, Tarantella/UNIX Engineer/Instructor
Alternative Technology, Inc.  http://www.alttech.com/
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