lwip: initialize link-local address correctly

[miri64]

lwIP does some weird byte-swapping in netif_create_ip6_linklocal_address()
with non-ethernet-addresses, so I rather initialize it like in GNRC, so it is
compatible to both GNRC and emb6.

[miri64]

Marked for 2016.10, since we can't fix the IEEE 802.15.4 header parsing issue for this release anyway, so Interop between the other stacks isn't possible anyway.

[kYc0o]

Ok let's try for the next release.

[miri64]

We shouldn't just try, but do ;-) but the interop is lwIP's business ;-)

[PeterKietzmann]

I can confirm that with this PR, local address and EUI-64 in lwip correlate like in RIOT. However, I am still not able to transmit UDP packets between two nodes, one with tests/lwip and one with examples/gnrc_networking.

so Interop between the other stacks isn't possible anyway

@miri64 do you say it is known that both stacks are currently not interoperable?

[miri64]

Yes, but that's on lwIP's side. They don't parse the IEEE 802.15.4 header correctly (they don't check the source PAN elision flag, but skip it anyway).

[PeterKietzmann]

Well, that's a pity but not part of this PR. ACK and go. Will you provide a backport to the latest release branch?

[miri64]

Yapp: #5741