EBT_ISOURCE       121 include/linux/netfilter_bridge/ebtables.h    | EBT_ILOGICALOUT | EBT_ISOURCE | EBT_IDEST)
EBT_ISOURCE       131 net/bridge/netfilter/ebtables.c 		if (FWINV2(verdict != 0, EBT_ISOURCE) )