EBT_ARP_OPCODE 12 include/linux/netfilter_bridge/ebt_arp.h #define EBT_ARP_MASK (EBT_ARP_OPCODE | EBT_ARP_HTYPE | EBT_ARP_PTYPE | \ EBT_ARP_OPCODE 28 net/bridge/netfilter/ebt_arp.c if (info->bitmask & EBT_ARP_OPCODE && FWINV(info->opcode != EBT_ARP_OPCODE 29 net/bridge/netfilter/ebt_arp.c ah->ar_op, EBT_ARP_OPCODE))