disconnect-script issue

[yick xie]

Hi developers
Firstly, let me have a introduction of my case
A TCP-based accelerator (serverspeeder or lotserver) provided by Appex
was deployed on my vps, and it was embedded  into the kernel
supposedly. On the average it worked very well with eth0, but question
is it isn't very supportive with ocserv, because it cannot detect the
dynamical launch or destroy of the tun device perfectly. Then I add a
script (some limited function supported by serverspeeder) to force it
detect a new interface. On connect phase everything is ok, as I can
see, the script followed the "assigning tun device xxx". The key issue
comes to the disconnect phase that serverspeeder seems detect the
release of a tun device, once the client sends the disconnect message,
and then serverspeeder crashes(that seemed like a deadlock of
detecting the the  released tun's communication). All of these
happened before my disconnect script execute a re-detect of all
interfaces.
I think the problem could lie on the sequence of the execution.

vpn-setup complete -> connect-script -> normal communication -> ....
-> client disconnect -> waiting for the disconnect-script -> the
release of the worker and vpn -> user disconnect

The sequence above is what I think is reasonable, while now what I
glanced over the log is the disconnect script cannot work as soon as
the client message was received.

My log is here:

Aug  4 11:36:55 ocserv[5584]: TLS[<5>]: REC[0x7554b0]: SSL 3.3
Application Data packet received. Epoch 0, length: 77
Aug  4 11:36:55 ocserv[5584]: TLS[<5>]: REC[0x7554b0]: Expected Packet
Application Data(23)
Aug  4 11:36:55 ocserv[5584]: TLS[<5>]: REC[0x7554b0]: Received Packet
Application Data(23) with length: 77
Aug  4 11:36:55 ocserv[5584]: TLS[<5>]: REC[0x7554b0]: Decrypted
Packet[71] Application Data(23) with length: 61
Aug  4 11:36:55 ocserv[5584]: worker[phone]: 110.*.*.* received 61 byte(s) (TLS)
Aug  4 11:36:55 ocserv[5584]: worker[phone]: 110.*.*.* received BYE
packet; exiting
Aug  4 11:36:55 ocserv[5573]: sec-mod: received request from pid 5584
and uid 65534
Aug  4 11:36:55 ocserv[5584]: worker[phone]: 110.*.*.* sending message
'sm: cli stats' to secmod
Aug  4 11:36:55 ocserv[5573]: sec-mod: cmd [size=54] sm: cli stats
Aug  4 11:36:55 ocserv[5584]: worker[phone]: 110.*.*.* sent periodic
stats (in: 11319, out: 3301) to sec-mod
Aug  4 11:36:55 kernel: [ 4256.084050] appex:  is down
Aug  4 11:36:55 kernel: [ 4256.091651] appex:  is down
Aug  4 11:36:55 kernel: [ 4256.096116] appex:  is del
Aug  4 11:36:55 ocserv[5572]: main[phone]: 110.*.*.*:58886 command socket closed
Aug  4 11:36:55 ocserv[5572]: main[phone]: 110.*.*.*:58886 user disconnected
Aug  4 11:36:55 ocserv[5572]: main[phone]: 110.*.*.*:58886 sending msg
sm: session close to sec-mod
Aug  4 11:36:55 ocserv[5573]: sec-mod: received request sm: session close
Aug  4 11:36:55 ocserv[5573]: sec-mod: cmd [size=24] sm: session close
Aug  4 11:36:55 ocserv[5573]: sec-mod: invalidating session of user
'phone' (session: SIyp0)
Aug  4 11:36:55 ocserv[5573]: sec-mod: permamently closing session of
user 'phone' (session: SIyp0)
Aug  4 11:36:55 ocserv[5601]: main[phone]: 110.*.*.*:58886 executing
script down /home/ocserv/tests/connect-script

Could anybody give me a hand to solve this problem, or some hints? please

Thanks for all your reading and looking forward to your reply.