issue with route

[Li, Qing]

  When I issued the following command by accident today:
 
       route add default -inet6 fe80:20d:56ff:fe8d:d4b0%fxp0

  The netstat shows the following:

Internet:
Destination        Gateway            Flags    Refs      Use  Netif
Expire
default            fe80:20d:56ff:fe8d:d4b0%fxp0          UGS         0
0   fxp0
10.9.44/24         link#1             U           1        0   fxp0
10.9.44.175        127.0.0.1          UGHS        0        0    lo0
127.0.0.1          link#4             UH          1        4    lo0

  So I went ahead and issued

      route add 10.1.1.1 -inet6 fe80::1%fxp0 

Internet:
Destination        Gateway            Flags    Refs      Use  Netif
Expire
default            fe80:20d:56ff:fe8d:d4b0%fxp0          UGS         0
0   fxp0
10.1.1.1           fe80::1%fxp0       UGHS        0        0   fxp0
10.9.44/24         link#1             U           1        0   fxp0
10.9.44.175        127.0.0.1          UGHS        0        0    lo0
127.0.0.1          link#4             UH          1        4    lo0


  I verified this behavior on both FreeBSD 5.4 Release and 6.0-CURRENT.

  I think this behavior is probably not intended and should be treated
  as a bug. I did a quick patch in sys/net/route.c
  (it's just as easy in sbin/route.c).

-------------
heavygear# cvs diff route.c
Index: route.c
===================================================================
RCS file: /home/ncvs/src/sys/net/route.c,v retrieving revision 1.108
diff
-r1.108 route.c
746c747,748
<               if ((flags & RTF_GATEWAY) && !gateway)
---
>                 if (flags & RTF_GATEWAY) {
>                     if (!gateway)
747a750,752
>                     if (dst && (dst->sa_family != gateway->sa_family))
>                         senderr(EPERM);
>                 }
-------------

  After the patch,

-------------
heavygear# route add 10.1.1.1 -inet6 fe80::1%fxp0
route: writing to routing socket: Operation not permitted
  

  Comments ?

  Thanks,

  -- Qing