Ignore unknown netlink events.

Bird sometimes reported 'bird: nl_parse_link: Malformed message received'.
The cause is that bird asynchronously received netlink packet from
wireless driver about some wireless event on its link layer. In that
case bird shouldn't complain.

diff --git a/sysdep/linux/netlink/netlink.c b/sysdep/linux/netlink/netlink.c
index a70428efe33d513c1fc84661a176655362d5c41d..4ab7fb1089ad682ea039be1c67e635ebb8afb30c 100644 (file)
--- a/sysdep/linux/netlink/netlink.c
+++ b/sysdep/linux/netlink/netlink.c
@@ -268,7 +268,8 @@ nl_parse_link(struct nlmsghdr *h, int scan)
   if (!a[IFLA_IFNAME] || RTA_PAYLOAD(a[IFLA_IFNAME]) < 2 ||
       !a[IFLA_MTU] || RTA_PAYLOAD(a[IFLA_MTU]) != 4)
     {
-      log(L_ERR "nl_parse_link: Malformed message received");
+      if (scan)
+        log(L_ERR "nl_parse_link: Malformed message received");
       return;
     }
   name = RTA_DATA(a[IFLA_IFNAME]);