see in6.c:in6_ifawithscope() probably ought to add a case int he TAILQ_FOREACH(ifp, ...) loop to 'continue;' if the interface is down...?
Penned by Stuart Henderson on 20130219 19:11.10, we have: | Someone trying to replace some latvian boxes with bgpd/npppd mentioned | a problem with v6 on carp interfaces in 'backup' state where their | address was used as source address, despite there being an address | on the carpdev which was up. | | I don't have a proper v6 carp setup handy to test but got a test | machine into a state with 'ifconfig carp0 down' (which seems should be | a close enough equivalent to 'carp backup' for tests) which did | indeed consider the 'down' carp interface as a source address. | | It can be bodged around with pltime 0 of course, but from looking at | in6_selectsrc() I don't see why it wouldn't just pick the address | from the interface associated with the route i.e. the one on em0.. | but then I must be missing something as I don't see where pltime 0 | is handled either... does anyone have clues? | | # ifconfig em0 | em0: flags=48b43<UP,BROADCAST,RUNNING,PROMISC,ALLMULTI,SIMPLEX,MULTICAST,INET6_NOPRIVACY> mtu 1500 | lladdr f0:de:f1:f9:a7:52 | priority: 0 | groups: egress | media: Ethernet autoselect (1000baseT full-duplex) | status: active | inet6 fe80::f2de:f1ff:fef9:a752%em0 prefixlen 64 scopeid 0x1 | inet6 2001:8b0:648e:cc01:f2de:f1ff:fef9:a752 prefixlen 64 autoconf pltime 604697 vltime 2591897 | inet 85.158.44.149 netmask 0xfffffff0 broadcast 85.158.44.159 | # ifconfig carp0 | carp0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 1500 | lladdr 00:00:5e:00:01:01 | priority: 0 | carp: INIT carpdev em0 vhid 1 advbase 1 advskew 0 | groups: carp | status: invalid | inet6 fe80::200:5eff:fe00:101%carp0 prefixlen 64 scopeid 0xa | inet6 2001:8b0:648e:cc01:200:5eff:fe00:101 prefixlen 64 detached autoconf pltime 604690 vltime 2591890 | inet6 2001:8b0:648e:cc01:5c46:9730:9899:1008 prefixlen 64 detached autoconf autoconfprivacy pltime 81660 vltime 600216 | inet6 2001:8b0:648e:cc01::ca1f prefixlen 64 | # $ route -n get -inet6 2001:8b0:648e:cc01:20d:b9ff:fe04:a330 | route to: 2001:8b0:648e:cc01:20d:b9ff:fe04:a330 | destination: 2001:8b0:648e:cc01:: | mask: ffff:ffff:ffff:ffff:: | interface: em0 | if address: fe80::f2de:f1ff:fef9:a752%em0 | priority: 4 (connected) | flags: <UP,DONE,CLONING> | use mtu expire | 0 0 0 | # ping6 jodrell | PING6(56=40+8+8 bytes) 2001:8b0:648e:cc01::ca1f --> 2001:8b0:648e:cc01:20d:b9ff:fe04:a330 | ^C | --- jodrell.spacehopper.org ping6 statistics --- | 3 packets transmitted, 0 packets received, 100.0% packet loss | | | # netstat -rnfinet6|grep -e 2001:8b0:648e:cc01 -e carp0 | 2001:8b0:648e:cc01::/64 link#1 UC 7 0 - 4 em0 | 2001:8b0:648e:cc01::1 00:0d:b9:17:0c:c4 UHLc 0 5 - 4 em0 | 2001:8b0:648e:cc01::ca1f link#1 UHLc 1 0 - 4 em0 | 2001:8b0:648e:cc01:200:5eff:fe00:101 00:00:5e:00:01:01 UHL 0 0 - 4 lo0 | 2001:8b0:648e:cc01:20d:93ff:fe63:da5a 00:0d:93:63:da:5a UHLc 1 8 - 4 em0 | 2001:8b0:648e:cc01:20d:b9ff:fe04:a330 00:0d:b9:17:0c:c4 UHLc 0 3 - 4 em0 | 2001:8b0:648e:cc01:5c46:9730:9899:1008 00:00:5e:00:01:01 UHL 0 0 - 4 lo0 | 2001:8b0:648e:cc01:f2de:f1ff:fef9:a752 f0:de:f1:f9:a7:52 UHLc 0 0 - 4 lo0 | fe80::%carp0/64 link#10 UC 12 0 - 4 carp0 | fe80::200:5eff:fe00:101%carp0 00:00:5e:00:01:01 UHL 0 0 - 4 lo0 | fe80::20d:93ff:fe63:da5a%carp0 00:0d:93:63:da:5a UHLc 0 2 - 4 carp0 | fe80::20d:b9ff:fe17:cc4%carp0 00:0d:b9:17:0c:c4 UHLc 0 0 - 4 carp0 | ff01::%carp0/32 link#10 UC 0 0 - 4 carp0 | ff02::%carp0/32 link#10 UC 2 0 - 4 carp0 | ff02::1:ff04:a330%carp0 link#10 UHLc 0 0 - 4 carp0 | ff02::1:ff63:da5a%carp0 link#10 UHLc 0 0 - 4 carp0 -- Todd Fries .. t...@fries.net ____________________________________________ | \ 1.636.410.0632 (voice) | Free Daemon Consulting, LLC \ 1.405.227.9094 (voice) | http://FreeDaemonConsulting.com \ 1.866.792.3418 (FAX) | PO Box 16169, Oklahoma City, OK 73113 \ sip:freedae...@ekiga.net | "..in support of free software solutions." \ sip:4052279...@ekiga.net \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ 37E7 D3EB 74D0 8D66 A68D B866 0326 204E 3F42 004A http://todd.fries.net/pgp.txt
