[Patches] [ python-Patches-945642 ] nonblocking i/o with ssl socket not working at all

Sat Jul 10 21:59:54 CEST 2004

Patches item #945642, was opened at 2004-05-01 00:14
Message generated for change (Comment added) made by tinolange
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=305470&aid=945642&group_id=5470

Category: Core (C code)
Group: Python 2.3
Status: Open
Resolution: None
Priority: 7
Submitted By: Tino Lange (tinolange)
Assigned to: Nobody/Anonymous (nobody)
Summary: nonblocking i/o with ssl socket not working at all

Initial Comment:
Hi!

Unfortunately the applied patches #675750 and #676472
(End of January by G. Talvola / B. Laurie / G. v.
Rossum) for timeout-sockets in version 1.09 and 1.10 to
Modules/_ssl.c broke the nonblocking SSL I/O.

In fact sslobj.read() became *always* blocking -
whether the underlying socket is blocking or
nonblocking doesn't matter at all.

In Python < 2.3 this has worked correctly, starting
with 2.3, 2.3.x up to the current CVS it doesn't work
anymore.

Attached is a sample:

0) [ Preparation ]
Please run stunnel on your machine to have a SSL service:
/usr/sbin/stunnel -p /path/to/some/cert -f -d 4711 -r 4712

1) [ Server ]
Please run the easy server.py 

2) [Client showing the bug]
Please run the client - and see how it hangs when you
use Python2.3.

Also attached is a diff against the current _ssl.c
which shows how to correct that behaviour while also
having the possibilities from the above timeout patches.

I carefully tested it,  please review and test yourself
and finally check-in.

If you have questions, please don't hesitate to ask me.

I really would like to see that not only in 2.4, but
also (if possible together with patch #909007 from S.
Nicolary) in a 2.3.4 release. Otherwise 2.3.x wasn't at
all able to handle nonblocking SSL connections properly.

Thanks and cheers,

Tino

----------------------------------------------------------------------

>Comment By: Tino Lange (tinolange)
Date: 2004-07-10 21:59

Message:
Logged In: YES 
user_id=212920

Hi!

Did you really start stunnel? It fakes the server.py LISTEN
on 4712 as ssl service listening on 4711.

I have stunnel 3.22 here. The options on 4.x might be
completely different.

You should see:

1) stunnel
tino at tinont:$ /usr/sbin/stunnel -p /path/to/some.cert  -f -d
4711 -r 4712
2004.07.10 21:49:56 LOG5[6518:1024]: Using '4712' as
tcpwrapper service name
2004.07.10 21:49:56 LOG5[6518:1024]: stunnel 3.22 on
i586-pc-linux-gnu PTHREAD+LIBWRAP with OpenSSL 0.9.6c 21 dec
2001
2004.07.10 21:49:56 LOG5[6518:1024]: FD_SETSIZE=1024, file
ulimit=1024 -> 500 clients allowed

2) server.py

tino at tinont:$ python server.py
server is waiting for client connection on port 4712!

3) client.py

a) python 2.1

tino at tinont:$ python client.py

SSL Issuer: '...'
SSL Server: '...'

... selecting, readset = [3], timeout = 1.0
... returning from select - r = [3]
... something to read from socket/ssl has arrived!
... going to read from sslobj
... read 'Hallo
'
... going to read from sslobj

... (ignored) ## SSL Socket Error (11): 'Resource
temporarily unavailable' ##
Hallo
... selecting, readset = [3], timeout = 1.0
... returning from select - r = []
... selecting, readset = [3], timeout = 1.0
... returning from select - r = []
... selecting, readset = [3], timeout = 1.0
... returning from select - r = []
... selecting, readset = [3], timeout = 1.0
... returning from select - r = []
... selecting, readset = [3], timeout = 1.0
... returning from select - r = []
... selecting, readset = [3], timeout = 1.0
... returning from select - r = []
... selecting, readset = [3], timeout = 1.0
... returning from select - r = []
... selecting, readset = [3], timeout = 1.0
... returning from select - r = []
... selecting, readset = [3], timeout = 1.0
... returning from select - r = []
... selecting, readset = [3], timeout = 1.0
... returning from select - r = [3]
... something to read from socket/ssl has arrived!
... going to read from sslobj
... read
'HalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHallo
'
... going to read from sslobj

... (ignored) ## SSL Socket Error (11): 'Resource
temporarily unavailable' ##
HalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHallo
... selecting, readset = [3], timeout = 1.0
... returning from select - r = []
... selecting, readset = [3], timeout = 1.0
... returning from select - r = []
... selecting, readset = [3], timeout = 1.0
... returning from select - r = []
... selecting, readset = [3], timeout = 1.0
... returning from select - r = []
... selecting, readset = [3], timeout = 1.0
... returning from select - r = []
... selecting, readset = [3], timeout = 1.0
... returning from select - r = []
... selecting, readset = [3], timeout = 1.0
... returning from select - r = []
... selecting, readset = [3], timeout = 1.0
... returning from select - r = []
... selecting, readset = [3], timeout = 1.0
... returning from select - r = []
... selecting, readset = [3], timeout = 1.0
... returning from select - r = []
... selecting, readset = [3], timeout = 1.0
... returning from select - r = [3]
... something to read from socket/ssl has arrived!
... going to read from sslobj
... read
'HalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHall'
... going to read from sslobj
... read
'oHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHal'
... going to read from sslobj
... read
'loHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHa'
... going to read from sslobj
... read
'lloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloH'
... going to read from sslobj
... read
'alloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHallo
'
... going to read from sslobj

... (ignored) ## SSL Socket Error (11): 'Resource
temporarily unavailable' ##
HalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHallo
... selecting, readset = [3], timeout = 1.0
... returning from select - r = []
... selecting, readset = [3], timeout = 1.0
... returning from select - r = []
... selecting, readset = [3], timeout = 1.0
... returning from select - r = []
... selecting, readset = [3], timeout = 1.0
... returning from select - r = []
... selecting, readset = [3], timeout = 1.0
... returning from select - r = []
... selecting, readset = [3], timeout = 1.0
... returning from select - r = []
... selecting, readset = [3], timeout = 1.0
... returning from select - r = []
... selecting, readset = [3], timeout = 1.0
... returning from select - r = []
... selecting, readset = [3], timeout = 1.0
... returning from select - r = []
... selecting, readset = [3], timeout = 1.0
... returning from select - r = [3]
... something to read from socket/ssl has arrived!
... going to read from sslobj
... read ''

## SSL Socket: Counterpart has closed the connection ##
tino at tinont:$

b) python 2.3.x or 2.4

tino at tinont:$ python2.3 client.py

SSL Issuer: '...'
SSL Server: '...'

... selecting, readset = [3], timeout = 1.0
... returning from select - r = [3]
... something to read from socket/ssl has arrived!
... going to read from sslobj
... read 'Hallo
'
... going to read from sslobj
... read
'HalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHallo
'
... going to read from sslobj
... read
'HalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHall'
... going to read from sslobj
... read
'oHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHal'
... going to read from sslobj
... read
'loHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHa'
... going to read from sslobj
... read
'lloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloH'
... going to read from sslobj
... read
'alloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHallo
'
... going to read from sslobj

... (ignored) ## SSL Socket Error (6): 'TLS/SSL connection
has been closed' ##
Hallo
HalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHallo
HalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHalloHallo

## SSL Socket: Counterpart has closed the connection ##
tino at tinont:$

As you can see the client.py completely blocks while the
server is sleeping between sending some data when using
python 2.3.x or 2.4.

In 2.1 and 2.2 the client.py returns as expected for a
nonblocking client in between - and select tells us when we
can continue reading.

Hope this helps

Tino

----------------------------------------------------------------------

Comment By: A.M. Kuchling (akuchling)
Date: 2004-07-10 21:12

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The test programs don't work for me, either with or without the patch.  
They both crash with 'error:140770FC:SSL routines:
SSL23_GET_SERVER_HELLO:unknown protocol'.  What should I be seeing?

----------------------------------------------------------------------

Comment By: Tino Lange (tinolange)
Date: 2004-05-12 00:20

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OK. Fine :-)

Please find below in file
"patch_honoring_the_style_guide.diff" an slightly changed
version of my original patch that follows the PEP7 better
(for the single else statements containg only one commad
without parantheses) - but still honors the rest of the file
also.

Only the formatting has changed a little bit, no content.

----------------------------------------------------------------------

Comment By: Brett Cannon (bcannon)
Date: 2004-05-11 19:17

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The way you showed it, Tino, is correct.  And I didn't realize the file was 
not following the spec.

At this point, though, since we are trying to get someone to check this in 
before 2.3.4 goes out the door I wouldn't worry about it too much.  Going 
in and fixing the syntax afterwards is not a huge deal.

So if you have the time, great.  Otherwise, because we have this 
possible time constraint and whom ever wrote the file in the first place 
didn't follow it, I wouldn't not worry about it too much.

----------------------------------------------------------------------

Comment By: Tino Lange (tinolange)
Date: 2004-05-11 09:53

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Thanks for the hint.

I guess --in the context of _ssl.c -- you only complain
about the lines:

 } else sockstate = SOCKET_OPERATION_OK;

or? Is that right?

I think all the other else's are consistent - at least with
the rest of the file - and some others I looked into (for
example _bsddb.c).

Or do you think that I shall reformat all the other else's
in the file? Also those that are not from me?

Really following the PEP it should look like:

if (foo) {
 ...
}
else if (otherfoo) {
 ...
}
else {
 ...
}

instead of 

if (foo) {
 ...
} else if (otherfoo) {
 ...
} else {
 ...
}

everywhere, or?

----------------------------------------------------------------------

Comment By: Brett Cannon (bcannon)
Date: 2004-05-11 03:10

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A style nit: put 'else' statements on their own line.  See PEP 7 (http://
www.python.org/peps/pep-0007.html) on C code guidelines.

But I am no network programmer so I have no clue if the solution is 
good.

----------------------------------------------------------------------

Comment By: Jesper ´JJ´ Jurcenoks (jesperjurcenoks)
Date: 2004-05-03 20:14

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Hi Tino.

I'll take your word for it. I though your ssl was based on the 
included SocketServer.py

Cheers JJ

----------------------------------------------------------------------

Comment By: Tino Lange (tinolange)
Date: 2004-05-02 10:40

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Hi JJ,

I just scanned your SocketServer.py - and I really don't see
how this  class might help? You don't offer a better
sslob.read() there, don't you?

So how could it help (besides maybe making my example
"server.py nicer).

If I put a sslobj on top of a socket object it is blocking
in 2.3, 2.3.x and higher. As proven in my example: Making
the underlying socket nonblocking has no effect - because
SSL_ERROR_WANT_READ and SSL_ERROR_WANT_WRITE from the
SSL_xxx() functions in the C-Library do not break out of the
while loop that was introduced in the above mentioned patches.

Cheers,

Tino

----------------------------------------------------------------------

Comment By: Jesper ´JJ´ Jurcenoks (jesperjurcenoks)
Date: 2004-05-02 04:46

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Hi Tino.

I just submitted a nonblocking SocketServer.py, it might just 
solve your problem.

JJ

----------------------------------------------------------------------

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https://sourceforge.net/tracker/?func=detail&atid=305470&aid=945642&group_id=5470