[debian-mysql] Bug#685382: mysql sets correctly ipv6only = 0

[Bernd Eckenfels]

I just tried mysql and it worksunsets "IPV6ONLY":

> sysctl net.ipv6.bindv6only
net.ipv6.bindv6only = 1
> grep bind /etc/mysql/my.cnf
bind-address = ::
> /etc/init.d/mysql restart
> netstat -tln | grep 3306
tcp6       0      0 :::3306                 :::*                    LISTEN
> nc -v6zn ::1 3306
nc: ::1 3306 open
> nc -v4zn 127.0.0.1 3306
nc: 127.0.0.1 3306 open

NB1: neighter net-tools netstat nor sockstat ss display the sockets  
BINDV6ONLY flag (i.e. there is no "tcp46" entry).
NB2: mysql does contain the code to unset IPV6ONLY, see  
mysql-5.5-5.5.31+dfsg/sql/mysqld.cc:

#ifdef IPV6_V6ONLY
     if (a->ai_family == AF_INET6)
     {
       arg= 0;
       (void) setsockopt(ip_sock, IPPROTO_IPV6, IPV6_V6ONLY, (char*)&arg,
                 sizeof(arg));
     }
#endif

So I think this bug can be closes.

Gruss
Bernd