On Sun, May 03, 2020 at 01:23:15PM +0200, Pali Rohár wrote: > Currently IPv6 addresses are assigned to tuple (IAID, DUID). When system > changes IAID/DUID then old assigned IPv6 address cannot be reused, even > when in config file was DHCPv6 assignment based on MAC address (and not on > DUID). > > IAID/DUID is changed when rebooting from one operating system to another; > or after reinstalling system. In reality it is normal that DUID of some > machine is changed, so people rather assign also IPv6 addresses based on > MAC address. > > So assigning IPv6 based on MAC address in dnsmasq is currently semi-broken.
How to reproduce that semi-brokenness? > This patch tries to fix it and honors IPv6 config rules with MAC address, > to always assign particular IPv6 address to specific MAC address (when > configured). And ignores the fact if IAID/DUID was changed. > > Normally IPv6 address should be assigned by IAID/DUID (which also state > DHCPv6 RFCs), but dnsmasq has already some support for assigning IPv6 > address based on MAC address, when users configured in config file. > > So this patch just tries to fix above problem for user configuration with > MAC addresses. It does not change assignment based on DUID. > --- > > This is my original patch rebased on top of current git master branch. Acknowledge > Previous email with this patch probably dropped into spambox > and was not processed. (unspoken words + http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2020q2/014018.html ) > So please let me know if now this email was correctly received. Recieved the patch and was able to `git am` it. It did compile and passed the unittests. No further check was done. Mostly because not facing the problem that patch submitter has. Probably some day I will, hence the above 'How to reproduce that semi-brokenness?' > src/rfc3315.c | 55 +++++++++++++++++++++++++++++++++++++++++++-------- > 1 file changed, 47 insertions(+), 8 deletions(-) > > diff --git a/src/rfc3315.c b/src/rfc3315.c > index b3f0a0a..e588b13 100644 > --- a/src/rfc3315.c > +++ b/src/rfc3315.c ... 142 lines of actual patch ... Groeten Geert Stappers -- Silence is hard to parse _______________________________________________ Dnsmasq-discuss mailing list Dnsmasqfirstname.lastname@example.org http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss