From: David Ahern <dsa@cumulusnetworks.com>
To: Wolfgang Nothdurft <netdev@linux-dude.de>, netdev@vger.kernel.org
Subject: Re: Forcing the output interface using ip6_route_output doesn't work
Date: Fri, 25 Sep 2015 15:13:03 -0600 [thread overview]
Message-ID: <5605B8DF.2070603@cumulusnetworks.com> (raw)
In-Reply-To: <560552A7.40305@linux-dude.de>
[-- Attachment #1: Type: text/plain, Size: 286 bytes --]
On 9/25/15 7:56 AM, Wolfgang Nothdurft wrote:
> It seems that the ip6_route_output(net, sk, fl6) kernel function ignores
> the fl6.flowi6_oif parameter for the routing decision.
It is considered, but a mismatch is not considered fatal.
I think the attached should fix your problem.
[-- Attachment #2: ip6-rt-get-with-oif.patch --]
[-- Type: text/plain, Size: 503 bytes --]
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 118f8fa1a809..cc52458f7226 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1169,7 +1169,8 @@ struct dst_entry *ip6_route_output(struct net *net, const struct sock *sk,
fl6->flowi6_iif = LOOPBACK_IFINDEX;
- if ((sk && sk->sk_bound_dev_if) || rt6_need_strict(&fl6->daddr))
+ if ((sk && sk->sk_bound_dev_if) || rt6_need_strict(&fl6->daddr) ||
+ fl6->flowi6_oif)
flags |= RT6_LOOKUP_F_IFACE;
if (!ipv6_addr_any(&fl6->saddr))
next prev parent reply other threads:[~2015-09-25 21:13 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-25 13:56 Forcing the output interface using ip6_route_output doesn't work Wolfgang Nothdurft
2015-09-25 21:13 ` David Ahern [this message]
2015-09-26 15:51 ` Wolfgang Nothdurft
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=5605B8DF.2070603@cumulusnetworks.com \
--to=dsa@cumulusnetworks.com \
--cc=netdev@linux-dude.de \
--cc=netdev@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).