On Mon, Dec 10, 2001 at 11:23:53AM +0100, Daniel Pettersson wrote:

> I have seen the same problem, the server just hangs forever when connecting with
> Netscape 6.[1|2].

> On Sat, 1 Dec 2001, Tim Regovich wrote:

>> New subscriber.  I checked the archives,m didnt find
>> anything appropriate.,
>>
>> run openssl -WWW
>>
>> have a file called test.html :
>> <html><body<img src="test.gif"><img
>> src="test.jpg"></body></html>
>>
>> make sure the images exist as well.
>>
>> connect using netscape 6.2
>>
>> The stack gets really corrupt.  I havent been able to
>> identify why yet.
[...]
>> Apppears to be a memory corruption.

Tim, can you elaborate?  Does OpenSSL just hang (as in Daniel's error
description) or does anything bad happen?

If the problem is just that nothing at all happens, the problem may be
caused by a well-known 'openssl -WWW' limitation in combination with a
Netscape bug: 'openssl -WWW' does not provide for any parallelization;
while one connection is open, no additional connections can be
accepted.  It appears that your version of Netscape waits for
something to happen on a second connection.  This is wrong -- while it
makes sense to *try* to use an additional connection, the client
should also continue to use the first connection, and it should be
prepared for the second connection to be useless.

(Obviously most servers are not as limited as 'openssl -WWW', but the
TCP stack usually will allow more incoming connections to pile up than
the application is actually ready to handle.  Assume that the TCP
stack accepts 256 connections and the server software handles only 128
of these simultaneously.  Then if there are more than 64 different
clients, not all of them will be able to get two *working* connections
to the server even if connections complete at TCP level.)


-- 
Bodo M�ller <[EMAIL PROTECTED]>
PGP http://www.informatik.tu-darmstadt.de/TI/Mitarbeiter/moeller/0x36d2c658.html
* TU Darmstadt, Theoretische Informatik, Alexanderstr. 10, D-64283 Darmstadt
* Tel. +49-6151-16-6628, Fax +49-6151-16-6036
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