ipv6 support for xrdp. about xrdp HOT 10 CLOSED

👍 I also happy if xrdp had ipv6 support. Anything new?

from xrdp.

@jsorg71
You disabled IPv6 at cd0a872, but why? Do you have a plan to re-enable IPv6?

from xrdp.

In other words, what should we do to re-enabling IPv6? What tasks remained?

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I broke some systems. I didn't have enough experience using ipv6. For example, BSD is a bit different.
I think until it's tested more, we should add --enable-ipv6

from xrdp.

I did --enable-ipv6 option. I'll give it a try for BSDs and other systems as much as I can. Please tell me how was it broken if you remember.

from xrdp.

I think it was something like mint 64 bit that would not accept connection.

For the BSD issue,

This is from
Thomas
on mailing list 04/04/2013

I second thing I observed:

Linux uses one socket for all - v4 and v6.

If I remember correctly BSD does not so behave.
In the case the xrdp needs compatibility with bsd, it could be necessary
to implement two sockets.

e.g. sshd does so:

tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 2574/sshd
tcp 0 0 :::22 :::* LISTEN 2574/sshd

xrdp

tcp 0 0 :::3389 :::* LISTEN 5311/xrdp

Regards,

Thomas

from xrdp.

After further investigation, BSD (at least FreeBSD) can handle both IPv4 and IPv6 in one socket.
SSH, PostgreSQL demon have independent socket for v4 and v6 . However, MySQL daemon seems to listen v4 and v6 in one socket.

Active Internet connections (including servers)
Proto Recv-Q Send-Q Local Address          Foreign Address        (state)
tcp4       0      0 *.ssh                  *.*                    LISTEN
tcp6       0      0 *.ssh                  *.*                    LISTEN
tcp46      0      0 *.mysql                *.*                    LISTEN
tcp4       0      0 *.rdp                  *.*                    LISTEN
tcp4       0      0 localhost.postgresql   *.*                    LISTEN
tcp6       0      0 localhost.postgresql   *.*                    LISTEN

from xrdp.

The problem looks quite simple (at least on FreeBSD).

IPv6 auto detection appeared in 54463af is not suitable for FreeBSD.

AC_CHECK_MEMBER([struct in6_addr.s6_addr],
                [],
                [AC_DEFINE(NO_ARPA_INET_H_IP6, 1, [for IPv6])],
                [#include <arpa/inet.h>])

This always fails. NO_ARPA_INET_H_IP6 is always 1 in FreeBSD and xrdp will always by built IPv6 support disabled.

from xrdp.

OpenBSD behaves a little bit different. Jay and Thomas talked on the mailing list.
We need to implement two sockets for OpenBSD but one socket is enough for others.

from xrdp.

IPv6 implementation in xrdp has been improved a lot (#714 etc). Let's close this once.
I don't think we don't need to listen IPv4 and IPv6 in separate socket right now.

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