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 :
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#!/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')
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The client receive the 'you have to give up' sentence every two seconds.
The second code is :
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#!/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')
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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
