dhcpcd-discuss

Hi Roy,

> If the above two fixes don't fix it for you, please provide more logs
> but with debug enabled in dhcpcd.conf this time please.

Thanks for taking a look at this, I've now added debug to my
dhcpcd.conf, and made it ipv6only to more clearly isolate the issue:

  debug
  ipv6only
  noipv6rs
  allowinterfaces enp1s0
  interface enp1s0
      ipv6rs
      ia_pd 1 enp2s0/1 wlxc412f52e39d2/2 wlxc412f52ebb7b/3 enp3s0/4

Actually I tested 7.0.0-rc1, which worked for me! So I think this
is a regression. I ran git bisect and was able to identify the bad
commit:

  6b068a4357a1f6644b4748cdf72edd280f73f135 is the first bad commit
  commit 6b068a4357a1f6644b4748cdf72edd280f73f135
  Author: Roy Marples <roy@xxxxxxxxxxxx>
  Date:   Tue Jun 13 20:47:49 2017 +0100
  
      Make ipv6_newaddr() more flexable so it's the sole source of
      creating ipv6_addr structures.
  

On dhcpcd-7.0.0-rc1-20-g6b068a43 (the first bad commit), I get the
incorrect prefix delegation:

  Sep 07 20:49:43 gateway dhcpcd[1638]: enp1s0: REPLY6 received from fe80::d6ca:6dff:fe74:72f8
  Sep 07 20:49:43 gateway dhcpcd[1638]: enp1s0: 2401:a400:2704:1750::/60: became stale
  Sep 07 20:49:43 gateway dhcpcd[1638]: enp1s0: adding address 2401:a400:2704:1750::/60
  Sep 07 20:49:43 gateway dhcpcd[1638]: enp1s0: pltime 544320 seconds, vltime 604800 seconds
  Sep 07 20:49:43 gateway dhcpcd[1638]: enp1s0: renew in 302400, rebind in 483840, expire in 604800 seconds
  Sep 07 20:49:43 gateway dhcpcd[1638]: lo: adding reject route to 2401:a400:2704:1700::/60
  Sep 07 20:49:43 gateway dhcpcd[1638]: enp1s0: writing lease `/var/lib/dhcpcd5/enp1s0.lease6'
  Sep 07 20:49:43 gateway dhcpcd[1638]: enp1s0: delegated prefix 2401:a400:2704:1750::/60
  Sep 07 20:49:43 gateway dhcpcd[1638]: enp2s0: adding address 2401:a400:2704:1701::1/64
  Sep 07 20:49:43 gateway dhcpcd[1638]: enp2s0: pltime 544320 seconds, vltime 604800 seconds
  Sep 07 20:49:43 gateway dhcpcd[1638]: enp2s0: waiting for DHCPv6 DAD to complete
  Sep 07 20:49:43 gateway dhcpcd[1638]: enp3s0: adding address 2401:a400:2704:1704::1/64
  Sep 07 20:49:43 gateway dhcpcd[1638]: enp3s0: pltime 544320 seconds, vltime 604800 seconds
  Sep 07 20:49:43 gateway dhcpcd[1638]: enp3s0: waiting for DHCPv6 DAD to complete

Whereas on dhcpcd-7.0.0-rc1-19-gb059aeb6 (the previous commit), I get
the correct prefix delegation:

  Sep 07 21:00:54 gateway dhcpcd[1840]: enp1s0: REPLY6 received from fe80::d6ca:6dff:fe74:72f8
  Sep 07 21:00:54 gateway dhcpcd[1840]: lo: adding reject route to 2401:a400:2704:1750::/60
  Sep 07 21:00:54 gateway dhcpcd[1840]: enp1s0: writing lease `/var/lib/dhcpcd5/enp1s0.lease6'
  Sep 07 21:00:54 gateway dhcpcd[1840]: enp1s0: delegated prefix 2401:a400:2704:1750::/60
  Sep 07 21:00:54 gateway dhcpcd[1840]: enp2s0: adding address 2401:a400:2704:1751::1/64
  Sep 07 21:00:54 gateway dhcpcd[1840]: enp2s0: pltime 544320 seconds, vltime 604800 seconds
  Sep 07 21:00:54 gateway dhcpcd[1840]: enp2s0: waiting for DHCPv6 DAD to complete
  Sep 07 21:00:54 gateway dhcpcd[1840]: enp3s0: adding address 2401:a400:2704:1754::1/64
  Sep 07 21:00:54 gateway dhcpcd[1840]: enp3s0: pltime 544320 seconds, vltime 604800 seconds
  Sep 07 21:00:54 gateway dhcpcd[1840]: enp3s0: waiting for DHCPv6 DAD to complete

I can send through more detailed logs and do more testing if that will help!

-- 
Regards,
Scott.

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