Date: Sun, 17 Sep 2006 12:07:01 -0700 From: Brian Somers <brian@Awfulhak.org> To: Hajimu UMEMOTO <ume@freebsd.org> Cc: Gary Jennejohn <gj@freebsd.org>, Julian Stacey <jhs@berklix.org>, net@freebsd.org Subject: Re: ppp command port does not listens on ipv4 unless no INET6 in kernel Message-ID: <20060917120701.4d8eb7ec@dev.lan.Awfulhak.org> In-Reply-To: <ygeu036katk.wl%ume@mahoroba.org> References: <200609141344.k8EDiI42092840@flat.berklix.org> <ygeu036katk.wl%ume@mahoroba.org>
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On Sun, 17 Sep 2006 20:10:47 +0900 Hajimu UMEMOTO <ume@freebsd.org> wrote:
> Hi,
>
> >>>>> On Thu, 14 Sep 2006 15:44:18 +0200 (CEST)
> >>>>> "Julian Stacey" <jhs@berklix.org> said:
>
> jhs> I'm not clear if this is a bug or a config error:
> jhs> It seems though my /usr/sbin/ppp was moving traffic
> jhs> to & from internet, it was only listening for commands
> jhs> (not data) on ipv6, not ipv4, thus I could not type commands
> jhs> like dial & drop, unless instead of running ppp -auto
> jhs> instead I invoked ppp manually in foreground on localhost.
>
> As far as I read the source of ppp(8), it only listen on an IPv6, and
> expects to listen on an IPv4 through an IPv4-mapped IPv6 address.
> However, an IPv4-mapped IPv6 address feature is disabled by default.
> ppp(8) should be rewritten to listen on both an IPv4 and an IPv6.
> But, it is slightly complex. So, I made a patch to enable an
> IPv4-mapped IPv6 address only for the socket that ppp(8) is listening
> on.
> I have no environment for testing this. Could you try this patch?
>
> Index: usr.sbin/ppp/server.c
> diff -u -p usr.sbin/ppp/server.c.orig usr.sbin/ppp/server.c
> --- usr.sbin/ppp/server.c.orig Sun Sep 5 10:46:52 2004
> +++ usr.sbin/ppp/server.c Sun Sep 17 19:54:43 2006
> @@ -346,6 +346,13 @@ server_TcpOpen(struct bundle *bundle, u_
> goto failed;
> }
>
> +#ifndef NOINET6
> + if (probe.ipv6_available) {
> + int off = 0;
> + setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, (char *)&off, sizeof(off));
> + }
> +#endif
> +
> setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &s, sizeof s);
> if (bind(s, (struct sockaddr *)&ss, sz) < 0) {
> log_Printf(LogWARN, "Tcp: bind: %s\n", strerror(errno));
>
>
> Sincerely,
AFAIR I had trouble getting that code to work and was advised at
the time that I'd just get the mapped port for free. I haven't
been using IPv6 on production machines for some time, so I haven't
seen the problem :(
It'd be great if you'd commit the patch if Julian says it works
ok for him.
Cheers.
--
Brian Somers <brian@Awfulhak.org>
Don't _EVER_ lose your sense of humour ! <brian@FreeBSD.org>
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