[OpenWrt-Devel] [PATCH] kernel/generic: (try) fixing MAP-E patch misbehaving in 4.0

[John Crispin]

On 09/02/18 13:20, Axel Neumann wrote:
> Hello,
>
> the 666 kernel patches [1,2,3] break the possibility for using an ip4ip6
> tunnel interface as a fall back interface accepting ip4-in-ip6 tunneled
> packets from any remote address. This works out of the box with any
> normal (non-666-patched) 4.4 (and earlier) kernel and can be configured
> by setting up an 'ip -6 tunnel' with type 'any' or 'ip4ip6' and a remote
> address of '::'.
>
> The misbehavior comes with line 290 of [3] which discards all packets
> that do not show the expected saddr, even if no single fmr rule was
> defined and despite the validity of the saddr was already approved earlier.
>
> Attached diff would re-enable this fall back capability without
> affecting the behavior in case of any configured FMR rules.
>
> It would be nice if the proposed or a similar fix could be applied asap
> because currently I see no way of recovering the standard kernel
> behavior which breaks certain desired bmx6 and bmx7 tunneling features.
>
> Best regards
> /axel

Hi Axel,

the patch should be a unified one and you forgot to add your SoB line. 
best option is to generate the patch using git and also sending it out 
using git send-email.

     John

>
> [1]
> https://github.com/openwrt-mirror/openwrt/blob/master/target/linux/generic/patches-3.18/666-Add-support-for-MAP-E-FMRs-mesh-mode.patch
> [2]
> https://github.com/openwrt-mirror/openwrt/blob/master/target/linux/generic/patches-4.1/666-Add-support-for-MAP-E-FMRs-mesh-mode.patch
> [3]
> https://github.com/openwrt-mirror/openwrt/blob/master/target/linux/generic/patches-4.4/666-Add-support-for-MAP-E-FMRs-mesh-mode.patch#L290
>
>
>
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