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<div class="moz-cite-prefix">On 05/22/2017 12:36 PM, Dean wrote:<br>
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<blockquote
cite="mid:fc4f2719-c682-0087-8088-308d88a955ba@gmail.com"
type="cite">
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<div class="moz-cite-prefix">On 05/22/2017 12:07 PM, Toke
Høiland-Jørgensen wrote:<br>
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<blockquote cite="mid:87o9ulxl12.fsf@alrua-kau" type="cite">
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<pre wrap="">Yes, they can. You can use two kernel protocols, one with the SADR
channel and the other with ipv6. Both sets of routes are stored in
the same kernel table.
</pre>
</blockquote>
<pre wrap="">Ah, yes, but I meant inside Bird in this instance. Can the bird 'struct
fib' hold both types of routes, or do you need a separate one for each?
</pre>
</blockquote>
No, the fib structure holds only one address type. But depending
on how you plan to use it, maybe you can simulate non-sadr entries
using ::/0 source prefix?<br>
<blockquote cite="mid:87o9ulxl12.fsf@alrua-kau" type="cite">
<blockquote type="cite" style="color: #000000;">
<pre wrap="">But the kernel bug is still present. Using both types of routes in the
same table gives undefined behavior. A hacky workaround would be to
replace ::/0 sources with 2000::/3 in netlink, but it would reduce the
set of accepted prefixes.
</pre>
</blockquote>
<pre wrap="">Do you have a quick howto on triggering this bug?</pre>
</blockquote>
<p>If you insert two routes with the same destination in the
routing table, one of them being SADR, the dst-only route is
ignored.</p>
<pre>2001:db9:1::3 from 2001:db9:1::4 dev v0 metric 1024
2001:db9:1::3 dev v0 metric 1024
</pre>
<p>Pinging to 2001:db9:1::3 using a source address that's not
2001:db9:1::4 gives a network unreachable error. Though if you
remove the SADR route, or if you add another SADR route with the
correct source address, it works fine.<br>
</p>
</blockquote>
<p>To add SADR routes with ip route you can use 'from'. I can't find
this in the manual.<br>
</p>
<pre>ip -6 route add 2001:db9:1::3 from 2001:db9:1::4 dev v0
</pre>
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