Wine - network error in War Thunder

[pekapeka]

Basically, playing on public servers is working, but when i trying to join "Custom Servers" (mode, where player is a host) the game gives me an error "Connection to battle server was lost. You will be returned to menu. "
Here is full terminal output, captured with WINEDEBUG=+debug
http://pastebin.com/zSBQpWdK
I have seen here strange error

Code: Select all

fixme:winsock:WS_setsockopt Unknown IPPROTO_IPV6 optname 0x00000027
fixme:winsock:WS_setsockopt Unknown IPPROTO_IPV6 optname 0x00000027
fixme:winsock:WS_setsockopt Unknown IPPROTO_IPV6 optname 0x00000027

Is it the root of the error?
If no, should i attach strace log for solving this problem?
ipv6 is disabled in my kernel and system.

I'm using gentoo amd64 , wine 1.6 rc5, linux kernel 3.9.4.
(and sorry for my english, i'm not native speaker)