select + ssl

[Ktm]

Hello,
I don't have the same behaviour with two codes who are quite the same,
one using SSL, the other not. I tested the programs with stunnel and
telnet , respectively.
Here are the first code :
------------------------------------------------------------------------------------------------------------------------------------------------
#!/usr/bin/python
from select import select
import socket
if __name__ == '__main__':
   s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
   s.bind(('', 6001))
   s.listen(5)
   ready_read = {}
   ready_send = {}
   ready_read[s] = s
   while True:
       rs, ws, _ = select(ready_read.keys(), ready_send.keys(), [], 2)
       print '.'
       for r in rs:
           if r == s:
               (cli, addr) = s.accept()
               ready_send[cli] = cli
               ready_read[cli] = cli
           else:
               ret = r.recv(1000)
               print 'ret =', ret
       for w in ws:
           w.send('you have to give up')
------------------------------------------------------------------------------------------------------------------------------------------------ 

 The client receive the 'you have to give up' sentence every two seconds.
The second code is :
------------------------------------------------------------------------------------------------------------------------------------------------ 

#!/usr/bin/python
from select import select
import socket
from   OpenSSL import SSL
import os
def verify_cb():
   return ok
if __name__ == '__main__':
   dir = ''
   ctx = SSL.Context(SSL.SSLv23_METHOD)
   ctx.set_options(SSL.OP_NO_SSLv2)
   ctx.set_verify(SSL.VERIFY_NONE, verify_cb)
   ctx.use_privatekey_file (os.path.join(dir, 'server.pkey'))
   ctx.use_certificate_file(os.path.join(dir, 'server.cert'))
   ctx.load_verify_locations(os.path.join(dir, 'CA.cert'))
   s = SSL.Connection(ctx, socket.socket(socket.AF_INET,
socket.SOCK_STREAM))
   #s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
   s.bind(('', 6000))
   s.listen(5)
   s.setblocking(0)
   ready_read = {}
   ready_send = {}
   ready_read[s] = s
   while True:
       rs, ws, _ = select(ready_read.keys(), ready_send.keys(), [], 2)
       print '.'
       for r in rs:
           if r == s:
               (cli, addr) = s.accept()
               ready_send[cli] = cli
               ready_read[cli] = cli
           else:
               ret = r.recv(1000)
               print 'ret =', ret
       for w in ws:
           w.send('you have to give up')
------------------------------------------------------------------------------------------------------------------------------------------------ 


The server blocks on recv here.
In both case I don't send anything with the client. (Perhaps stunnel
send something that I don't see ?)
Why does the server block ?
Kototama
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