Re: [Openvpn-devel] Problem with OpenVPN 2.1_rc9 on Vista 32-bit

[Bart K. <me...@ba...>]

James Yonan wrote:
> Bart Kus wrote:
>> Sent this to openvpn-users a while back with no response.  Perhaps it 
>> is a question better targeted @ the developers?
>>
>> --Bart
>>
>>
>> Bart Kus wrote:
>>> Thu Aug 07 19:24:06 2008 OpenVPN 2.1_rc9 i686-pc-mingw32 [SSL] 
>>> [LZO2] [PKCS11] built on Jul 31 2008
>>>
>>> [...] snip! [...]
>>>
>>> Thu Aug 07 19:24:53 2008 write to TUN/TAP  [State=AT?c 
>>> Err=[c:\src\21\tap-win32\tapdrvr.c/2268] #O=10 Tx=[49,0] Rx=[6,88] 
>>> IrpQ=[1,1,16] PktQ=[0,1,64]]: The data area passed to a system call 
>>> is too small.   (code=122)
>>> Thu Aug 07 19:25:03 2008 write to TUN/TAP  [State=AT?c 
>>> Err=[c:\src\21\tap-win32\tapdrvr.c/2268] #O=10 Tx=[49,0] Rx=[6,89] 
>>> IrpQ=[1,1,16] PktQ=[0,1,64]]: The data area passed to a system call 
>>> is too small.   (code=122)
>>> Thu Aug 07 19:25:12 2008 write to TUN/TAP  [State=AT?c 
>>> Err=[c:\src\21\tap-win32\tapdrvr.c/2268] #O=10 Tx=[50,0] Rx=[6,90] 
>>> IrpQ=[1,1,16] PktQ=[0,1,64]]: The data area passed to a system call 
>>> is too small.   (code=122)
>
> Are you using a non-standard MTU size?  This error indicates that a 
> write operation to the TAP driver is impossibly small, i.e. the packet 
> isn't even large enough to contain an ethernet header (for dev tap) or 
> IPv4 header (for dev tun).
>
> James
Negatory.  MTU is 1500:

   MTU  MediaSenseState   Bytes In  Bytes Out  Interface
------  ---------------  ---------  ---------  -------------
4294967295                1          0      23833  Loopback 
Pseudo-Interface 1
  1500                1  2450317296  362556326  Local Area Connection
  1500                5          0          0  Local Area Connection 2

Also, I'm using the TUN device.  Here's my config:

client
dev tun
proto tcp
remote <CENSORED>
resolv-retry infinite
nobind
persist-key
persist-tun
pkcs12 bkus1.p12
verb 3
ns-cert-type server
route-delay 30
route-method exe


The server grants the connection, an IP is assigned, but when traffic 
tries to move, I keep seeing those errors and nothing gets communicated.

--Bart