[stunnel-users] Stunnel client not sending data

Tue Oct 24 20:52:14 CEST 2006

Hello,

I have a program that opens up a connection to port 10000 of a server
and sends it some data. It works normally. I'm trying to "stunnel"
both ends.

In my program I create a socket, connect to local port 7033, send my
data, and close the socket. I verified that every function call
returns success (socket, setsockopt (for TCP_NODELAY), gethostbyname,
connect, and send).

>From what the logs show below, it seems that server stunnel gets the
connection from the client stunnel, they successfully negotiate the
SSL stuff, then the client stunnel waits for any data to proxy to the
server stunnel. The server stunnel is waiting too, and after 10
seconds of no data, it closes the socket.

For some reason the client stunnel is not getting my data and
therefore doesn't forward anything over to the server stunnel. I'm not
sure why this is happening, because my program works normally and I've
verified that everything returned success.

Any ideas?

 - Jeremiah

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

ON CLIENT (1.2.3.60)

Linux
stunnel 4.16
OpenSSL 0.9.7c

stunnel.conf is...
pid =
client  = yes

[7033]
   accept = 127.0.0.1:7033
   connect = 1.2.3.70:7033

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

ON SERVER (1.2.3.70)

Windows
stunnel 4.16 windows binary installer (Aug 31 2006)

stunnel.conf is...

cert = stunnel.pem
socket = l:TCP_NODELAY=1
socket = r:TCP_NODELAY=1
debug = 7

[7033]
   accept = 1.2.3.60:7033
   connect = 127.0.0.1:10000

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

On client I see this debug...

Oct 24 14:38:22 stunnel: LOG5[2892:258]: 7033 connected from 127.0.0.1:10251
Oct 24 14:38:32 stunnel: LOG3[2892:258]: SSL_read: Connection reset by
peer (104)
Oct 24 14:38:32 stunnel: LOG5[2892:258]: Connection reset: 56 bytes
sent to SSL, 0 bytes send to socket

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

On server I see this debug...

2006.10.24 14:43:08 LOG7[2596:4068]: 7033 accepted FD=196 from 1.2.3.60:10252
2006.10.24 14:43:08 LOG7[2596:4068]: Creating a new thread
2006.10.24 14:43:09 LOG7[2596:4068]: New thread created
2006.10.24 14:43:09 LOG7[2596:2372]: 7033 started
2006.10.24 14:43:09 LOG7[2596:2372]: FD 196 in non-blocking mode
2006.10.24 14:43:09 LOG7[2596:2372]: TCP_NODELAY option set on local socket
2006.10.24 14:43:09 LOG5[2596:2372]: 7033 connected from 1.2.3.60:10252
2006.10.24 14:43:09 LOG7[2596:2372]: SSL state (accept): before/accept
initialization
2006.10.24 14:43:09 LOG7[2596:2372]: SSL state (accept): SSLv3 read
client hello A
2006.10.24 14:43:09 LOG7[2596:2372]: SSL state (accept): SSLv3 write
server hello A
2006.10.24 14:43:09 LOG7[2596:2372]: SSL state (accept): SSLv3 write
certificate A
2006.10.24 14:43:09 LOG7[2596:2372]: SSL state (accept): SSLv3 write
server done A
2006.10.24 14:43:09 LOG7[2596:2372]: SSL state (accept): SSLv3 flush data
2006.10.24 14:43:09 LOG7[2596:2372]: SSL state (accept): SSLv3 read
client key exchange A
2006.10.24 14:43:09 LOG7[2596:2372]: SSL state (accept): SSLv3 read finished A
2006.10.24 14:43:09 LOG7[2596:2372]: SSL state (accept): SSLv3 write
change cipher spec A
2006.10.24 14:43:09 LOG7[2596:2372]: SSL state (accept): SSLv3 write finished A
2006.10.24 14:43:09 LOG7[2596:2372]: SSL state (accept): SSLv3 flush data
2006.10.24 14:43:09 LOG7[2596:2372]:    3 items in the session cache
2006.10.24 14:43:09 LOG7[2596:2372]:    0 client connects (SSL_connect())
2006.10.24 14:43:09 LOG7[2596:2372]:    0 client connects that finished
2006.10.24 14:43:09 LOG7[2596:2372]:    0 client renegotiations requested
2006.10.24 14:43:09 LOG7[2596:2372]:    5 server connects (SSL_accept())
2006.10.24 14:43:09 LOG7[2596:2372]:    5 server connects that finished
2006.10.24 14:43:09 LOG7[2596:2372]:    0 server renegotiations requested
2006.10.24 14:43:09 LOG7[2596:2372]:    1 session cache hits
2006.10.24 14:43:09 LOG7[2596:2372]:    1 session cache misses
2006.10.24 14:43:09 LOG7[2596:2372]:    1 session cache timeouts
2006.10.24 14:43:09 LOG6[2596:2372]: SSL accepted: new session negotiated
2006.10.24 14:43:09 LOG6[2596:2372]: Negotiated ciphers: AES256-SHA
          SSLv3 Kx=RSA      Au=RSA  Enc=AES(256)  Mac=SHA1
2006.10.24 14:43:09 LOG7[2596:2372]: FD 180 in non-blocking mode
2006.10.24 14:43:09 LOG7[2596:2372]: 7033 connecting 127.0.0.1:10000
2006.10.24 14:43:09 LOG7[2596:2372]: connect_wait: waiting 10 seconds
2006.10.24 14:43:19 LOG6[2596:2372]: connect_wait: s_poll_wait timeout
2006.10.24 14:43:19 LOG5[2596:2372]: Connection reset: 0 bytes sent to
SSL, 0 bytes sent to socket
2006.10.24 14:43:19 LOG7[2596:2372]: 7033 finished (0 left)