NF_DN_ROUTE 657 net/decnet/dn_route.c return NF_HOOK(PF_DECnet, NF_DN_ROUTE, skb, skb->dev, NULL, dn_route_discard); NF_DN_ROUTE 121 net/decnet/netfilter/dn_rtmsg.c .hooknum = NF_DN_ROUTE,