[quagga] OSPF6: Network: sendmsg (ifindex: 9) failed: Invalid argument(22)

[quagga-users 1193] ospf6 on 2.6.x linux kernel - IN6_IS_ADDR_LINKLOCAL - fe80::/128

https://lists.quagga.net/pipermail/quagga-dev/2004-January/000786.html

-----BEGIN PGP SIGNED MESSAGE-----Hash: SHA1Hi,Lukasz Biegaj wrote:| Is there a way to make OSPF6 work on 2.6.x linux kernels?|| Currently I see this in logs:| 2003/12/24 11:23:13 OSPF6: LSA: originate [AS-External ID=0.0.0.9Adv=80.55.247.118] seq: 0x80000001 age: 0| 1072261393.983434| 2003/12/24 11:23:13 OSPF6: ASBR: start redistributing 2000::/3 asLS-ID 10: 1072261393.983804| 2003/12/24 11:23:13 OSPF6: ASBR: schedule redistribution 2000::/3 asLS-ID 10 after 0 sec| 2003/12/24 11:23:13 OSPF6: LSA: originate [AS-External ID=0.0.0.10Adv=80.55.247.118] seq: 0x80000001 age: 0| 1072261393.983985| 2003/12/24 11:23:14 OSPF6: Network: Join AllDRouters on ifindex 4| 2003/12/24 11:23:14 OSPF6: Network: sendmsg (ifindex: 4) failed:Invalid argument(22)[...]| Linux 2.6.0, Debian SID, quagga from apt.|we ran into the same problem and found this:* Linux 2.6 seems to list all multicast / anycast adresses together withunicast addresses:[equinox at spaceboyz]:~ # ip a l dc29: dc2 at NONE: <POINTOPOINT,MULTICAST,NOARP,UP> mtu 1460 qdisc noqueue~    link/gre 0.0.0.0 peer 217.82.189.49~    inet 172.22.24.1 peer 172.22.2.2/32 scope global dc2~    inet6 fe80::ac17:2402/64 scope link~       valid_lft forever preferred_lft forever~    inet6 ff02::5/128 scope global~       valid_lft forever preferred_lft forever~    inet6 ff02::1/128 scope global~       valid_lft forever preferred_lft forever~    inet6 fe80::/128 scope global~       valid_lft forever preferred_lft forever(note the 2nd last line)* ospf6d uses the address list for selecting a linklocal address withIN6_IS_ADDR_LINKLOCAL(quagga/ospf6d/ospf_interface.c:192)~      /* linklocal scope check */~      if (IN6_IS_ADDR_LINKLOCAL (&c->address->u.prefix6))~        l = &c->address->u.prefix6;* IN6_IS_ADDR_LINKLOCAL is defined in /usr/include/netinet/in.h:307 asfollows:#define IN6_IS_ADDR_LINKLOCAL(a) \~        ((((__const uint32_t *) (a))[0] & htonl (0xffc00000)) \~         == htonl (0xfe800000))* in conjunction with 2.6 reporting all multicast/anycast addresses,this gets fe80:: (all-routers as far as i remember) into the OSPF6interface, but the kernel will reject this (of course...):~  OSPF6: Network: sendmsg (ifindex: 9) failed: Invalid argument(22)I don't know whose fault it is (how is IN6_IS_ADDR_LINKLOCAL defined towork? Is it OK for the kernel to include anycast/multicast addresses?)but this breaks ospf6d. Our fix was to change netinet/in.h becauseIN6_IS_ADDR_LINKLOCAL returning !0 only for unicast addresses seemed tobe "the right thing". Patch attached. (categorize that patch as "dirtyworks-for-me hack")David LamparterP.S.: glibc people please Cc me, i'm only subscribed to netdev and quagga-*System environment:Linux Kernel 2.6.1, x86, non-SMP, preemptible, vanillaGNU C Library stable release version 2.3.2, by Roland McGrath et al.quagga 0.96.4 CVS (Fre Jan 16 16:43:35 CET 2004)gcc version 3.2.3 20030422 (Gentoo Linux 1.4 3.2.3-r3, propolice)- --A0C21986 David Lamparter (equinox) <david.lamparter at t-online.de>2D7F 5CC6 93AD 38DD 6CD5  47A0 A5F0 4657 A0C2 1986-----BEGIN PGP SIGNATURE-----Version: GnuPG v1.2.1 (MingW32)Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.orgiD8DBQFACAplpfBGV6DCGYYRAlQ9AJ44NbGi+WCVsMiCqq7Sklg7cKq1GQCePAjnQK+iNxE0JP+rdar7H3Ceapw==QdyO-----END PGP SIGNATURE------------------- next part --------------An embedded and charset-unspecified text was scrubbed...Name: glibc-ipv6-is_linklocal.patchURL: <http://lists.quagga.net/pipermail/quagga-dev/attachments/20040116/cb9a667c/attachment.ksh>