Add support for IPv6 SLAAC (rebased) #325
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The current code is buggy if an interface only use ipv6.
ipv6 don't have primary and are not ordered, so change can randomly
remove/re-add all ipv6 address
```
auto eno4
iface eno4 inet6 static
address 2001:db8:a0b:12f0::1/64
info: eno4: netlink: ip addr add 2001:db8:a0b:12f0::1/64 dev eno4
auto eno4
iface eno4 inet6 static
address 2001:db8:a0b:12f0::1/64
address 2001:db8:a0b:12f0::2/64
info: eno4: netlink: ip addr add 2001:db8:a0b:12f0::2/64 dev eno4
auto eno4
iface eno4 inet6 static
address 2001:db8:a0b:12f0::1/64
address 2001:db8:a0b:12f0::2/64
address 2001:db8:a0b:12f0::3/64
info: eno4: primary ip changed (from 2001:db8:a0b:12f0::1/64 to 2001:db8:a0b:12f0::2/64) we need to purge all ip addresses and re-add them
info: eno4: netlink: ip addr del 2001:db8:a0b:12f0::2/64 dev eno4
info: eno4: netlink: ip addr del 2001:db8:a0b:12f0::1/64 dev eno4
info: reading '/proc/sys/net/ipv6/conf/eno4/disable_ipv6'
info: eno4: netlink: ip addr add 2001:db8:a0b:12f0::1/64 dev eno4
info: eno4: netlink: ip addr add 2001:db8:a0b:12f0::2/64 dev eno4
info: eno4: netlink: ip addr add 2001:db8:a0b:12f0::3/64 dev eno4
```
Signed-off-by: Christoph Heiss <[email protected]>
we want to get IFA_FLAGS to known if an ip is permanent (0x80), or dynamic (slaac)
simply sysctl accept_ra=1 && autoconf=1
Currently it's only available in dhcp method. Set 0 by default (if interface was previously method auto).
we manage them in address now
user can defined both static ips && enable accept_ra 1 in as or auto method exemple1: ---------- iface eth0 inet auto iface eth0 inet6 static address .... exemple2: -------- iface eth0 inet6 static address .... accept_ra 1 autoconf 1 We need to process configured addresses, but we won't purge ipv6 on reload
Signed-off-by: Christoph Heiss <[email protected]>
factorize with adding_get_netlink_cache_accept_ra && _get_netlink_cache_auto and correctly test if cache exist or not the netlink cache can have empty value for an interface, if the interface was not existing when we have populate the cache. for example, a vlan interface created in pre-up by vlan module. In this case, we return an empty string , and fix parsing of empty netlink cache
accept_ra is only to get default gw, autoconf is for generate ip Also skip only dynamic ipv6 (!ipflag permanent 0x80)
Signed-off-by: Christoph Heiss <[email protected]>
Signed-off-by: Christoph Heiss <[email protected]>
Signed-off-by: Christoph Heiss <[email protected]>
Signed-off-by: Christoph Heiss <[email protected]>
Signed-off-by: Christoph Heiss <[email protected]>
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Hi!
This is essentially just a rebased version of #259, since that seems to have gone stale for quite a while now.
I've added some small commits on top for some small cleanups, nothing that should change functionality though.
so hopefully nothing broke, but I'm still testing it some more currently.So this should close #259, #249, #122 and #178.