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18.12.10.4. ARP/RARP
					Protocol ID: arp or rarp
				
					Rules of this type should either go into the root or arp/rarp chain.
				
| Attribute Name | Datatype | Definition | 
|---|---|---|
| srcmacaddr | MAC_ADDR | MAC address of sender | 
| srcmacmask | MAC_MASK | Mask applied to MAC address of sender | 
| dstmacaddr | MAC_ADDR | MAC address of destination | 
| dstmacmask | MAC_MASK | Mask applied to MAC address of destination | 
| hwtype | UINT16 | Hardware type | 
| protocoltype | UINT16 | Protocol type | 
| opcode | UINT16, STRING | Opcode valid strings are: Request, Reply, Request_Reverse, Reply_Reverse, DRARP_Request, DRARP_Reply, DRARP_Error, InARP_Request, ARP_NAK | 
| arpsrcmacaddr | MAC_ADDR | Source MAC address in ARP/RARP packet | 
| arpdstmacaddr | MAC _ADDR | Destination MAC address in ARP/RARP packet | 
| arpsrcipaddr | IP_ADDR | Source IP address in ARP/RARP packet | 
| arpdstipaddr | IP_ADDR | Destination IP address in ARP/RARP packet | 
| gratuitous | BOOLEAN | Boolean indiating whether to check for a gratuitous ARP packet | 
| comment | STRING | text string up to 256 characters |