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IFF_BROADCAST1194drivers/net/arcnet.cdev->flags    = IFF_BROADCAST;
IFF_BROADCAST130drivers/net/loopback.cdev->flags    = IFF_LOOPBACK|IFF_BROADCAST;
IFF_BROADCAST183drivers/net/net_init.cdev->flags    = IFF_BROADCAST|IFF_MULTICAST;
IFF_BROADCAST213drivers/net/net_init.cdev->flags    = IFF_BROADCAST;
IFF_BROADCAST105fs/nfs/nfsroot.cdev->flags = IFF_UP | IFF_BROADCAST | IFF_RUNNING;
IFF_BROADCAST984net/core/dev.cIFF_BROADCAST | IFF_DEBUG | IFF_LOOPBACK |
IFF_BROADCAST54net/core/net_alias.c#define  NET_ALIAS_IFF_MASK   (IFF_UP|IFF_BROADCAST|IFF_RUNNING|IFF_NOARP|IFF_LOOPBACK|IFF_POINTOPOINT)
IFF_BROADCAST128net/ipv4/devinet.cif ((dev->flags & IFF_BROADCAST) && addr == dev->pa_brdaddr)
IFF_BROADCAST511net/ipv4/ip_output.cif((dev->flags&IFF_BROADCAST) && (iph->daddr==dev->pa_brdaddr||iph->daddr==0xFFFFFFFF) && !(dev->flags&IFF_LOOPBACK))
IFF_BROADCAST979net/ipv4/ip_output.cif((dev->flags&IFF_BROADCAST) && (daddr==0xFFFFFFFF || daddr==dev->pa_brdaddr) && !(dev->flags&IFF_LOOPBACK))