> On Mar 13, 2024, at 9:09 PM, Zhenlei Huang <z...@freebsd.org> wrote: > > > >> On Mar 13, 2024, at 12:19 PM, Zhenlei Huang <z...@freebsd.org >> <mailto:z...@freebsd.org>> wrote: >> >> >> >>> On Mar 13, 2024, at 4:36 AM, Benoit Chesneau <beno...@enki-multimedia.eu >>> <mailto:beno...@enki-multimedia.eu>> wrote: >>> >>> On latest freebsd 14.0 release , I am trying to join an ipv4 address over >>> an IPV6 local link using the following command : >>> >>> `route add -net 10.200.1.1/32 -inet6 fe80::9439:36ff:fef0:7cbd%vlan200` >>> >>> But I get the following error: >>> >>> ``` >>> route add -net 10.200.1.1/32 -inet6 fe80::9439:36ff:fef0:7cbd%vlan200 >>> add net 10.200.1.1: gateway fe80::9439:36ff:fef0:7cbd%vlan200 fib 0: >>> Invalid argument >> >> I guess that is regression by transition of route(8) to NETLINK. >> >> Can you please build sbin/route from source without NETLINK and give it >> another try ? >> >> ``` >> # cd /usr/src/sbin/route >> # setenv MK_NETLINK_SUPPORT no >> # make >> ``` > > Hi Benoit, > > I managed to repeat this bug. > > As a workaround, add an IPv4 address to the outgoing interface (vlan200 in > your case), > ``` > # ifconfig vlan200 inet x.x.x.x/y > ``` > > then retry adding the route > ``` > # route add -net 10.200.1.1/32 -inet6 fe80::9439:36ff:fef0:7cbd%vlan200 > ``` >
Hi Alexander, I think the logic of adding route from NETLINK routine is not complete. After bumping netlink debug level, ``` # sysctl net.netlink.debug.nl_route_debug_level=9 ``` I got these from kernel message: ``` # dmesg | tail .. [nl_route] finalize_nhop: Unable to determine ifa, skipping [nl_route] rtnl_handle_newroute: Error creating nexthop .. ``` From https://cgit.freebsd.org/src/tree/sys/netlink/route/rt.c?h=releng/14.0#n753 : ``` /* Both nh_ifp and gateway are set */ if (nh->nh_ifa == NULL) { const struct sockaddr *gw_sa = &nh->gw_sa; if (gw_sa->sa_family != dst->sa_family) { /* * Use dst as the target for determining the default * preferred ifa IF * 1) the gateway is link-level (e.g. direct route) * 2) the gateway family is different (e.g. IPv4 over IPv6). */ gw_sa = dst; } struct ifaddr *ifa = ifaof_ifpforaddr(gw_sa, nh->nh_ifp); if (ifa == NULL) { NL_LOG(LOG_DEBUG, "Unable to determine ifa, skipping"); *perror = EINVAL; return (NULL); } nhop_set_src(nh, ifa); } ``` If the outgoing interface `nh->nh_ifp` does not have any IPv4 addresses, we should try ifaddrs on other interfaces, and have 0.0.0.0 as the last sort ( in case the net stack is IPv6 only, i.e., no IPv4 addresses available ) >> >>> ``` >>> >>> ping6 to `fe80::9439:36ff:fef0:7cbd%vlan200` works. What I am doing wrong? >>> Configuration of the interface is the following: >>> >>> ``` >>> vlan200: flags=1008843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,LOWER_UP> >>> metric 0 mtu 1500 >>> >>> options=4600703<RXCSUM,TXCSUM,TSO4,TSO6,LRO,RXCSUM_IPV6,TXCSUM_IPV6,MEXTPG> >>> ether fe:d9:dd:2d:35:c5 >>> inet6 fe80::fcd9:ddff:fe2d:35c5%vlan200 prefixlen 64 scopeid 0x5 >>> groups: vlan >>> vlan: 200 vlanproto: 802.1q vlanpcp: 0 parent interface: iavf0 >>> media: Ethernet autoselect (10Gbase-SR <full-duplex>) >>> status: active >>> nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL >>> ``` >>> >>> >>> >>> Benoît >> >> Best regards, >> Zhenlei
