Bind to multiple addresses on OpenBSD 5.6

[soeren+bitlbee@…]

BitlBee doesn't seem to be able to bind to more than one IP address on OpenBSD. My 'bitlbee.conf' contains the following line: 'DaemonInterface = localhost'. The host 'localhost' is specified in '/etc/hosts' as follows:

$ cat /etc/hosts
127.0.0.1       localhost
::1             localhost

Now if I start Bitlbee the expected result is that the servers binds to 127.0.0.1:6667 and [::1]:6667 but unfortunately it only binds to the IPv6 Address ([::1]:6667).

$ netstat -na -p tcp | grep LISTEN | grep 6667
tcp6          0      0  ::1.6667         *.*                    LISTEN

I believe that this is a bug and not a feature, because it seems to be impossible to make BitlBee listen on an IPv6 and IPv4 address simultaneously.

[anonymous]

Sorry, never used trac. Fucked up the formation, further more there is small typo in there.

My bitlbee.conf contains 'DaemonInterface = localhost' not 'DaemonInterface = 127.0.0.1'

And the output of the commands is:

$ cat /etc/hosts
127.0.0.1 localhost
::1       localhost
$ netstat -na -p tcp | grep LISTEN | grep 6667
tcp6 0 0 ::1.6667 *.* LISTEN 

[dx]

There, fixed it for you.

This isn't really specific to openbsd at all

[dx]

Possibly related: #1008

[dx]

Had a look at this one, actually seems to be openbsd specific. In linux, if you listen in ::1, you can connect to 127.0.0.1 (even with netstat showing only one tcp6 entry). In openbsd, if you listen in ::1, connecting to 127.0.0.1 fails.

[dx]

Seems that bitlbee tries to set IPV6_V6ONLY to false so that it listens in both ipv6 and ipv4, buuuut...

​http://stackoverflow.com/a/8213504/2195033 says

It looks like *BSD derived OS doesn't allow set nor clear this option. I see the same behavior on FreeBSD 8.X. The socket is 100% AF_INET6.

Apparently this means we must have more than one socket. Welp.