Variations on ARP
From rukapedia
Various Plazes tools depend on the presence of the arp command in the OS to obtain the MAC address of the default gateway. And various implementations of arp return results in their own fashion. On this page I'm starting to assemble a list of variations on the output of arp to aid in developing a standard library of code that will allow all variations to be used.
Mac OS X
Usage:
usage: arp [-n] hostname arp [-n] -a arp -d hostname [pub] arp -d -a arp -s hostname ether_addr [temp] [pub] arp -S hostname ether_addr [temp] [pub] arp -f filename
Sample output, using the IP address of the default gateway:
# arp 192.168.1.1 ? (192.168.1.1) at 0:14:bf:8f:53:2d on en0 [ethernet]
Linux
RedHat Enterprise Linux v4
Usage:
Usage: arp [-vn] [<HW>] [-i <if>] [-a] [<hostname>] <-Display ARP cache arp [-v] [-i <if>] -d <hostname> [pub][nopub] <-Delete ARP entry arp [-vnD] [<HW>] [-i <if>] -f [<filename>] <-Add entry from file arp [-v] [<HW>] [-i <if>] -s <hostname> <hwaddr> [temp][nopub] <-Add entry arp [-v] [<HW>] [-i <if>] -s <hostname> <hwaddr> [netmask <nm>] pub <-''- arp [-v] [<HW>] [-i <if>] -Ds <hostname> <if> [netmask <nm>] pub <-''- -a display (all) hosts in alternative (BSD) style -e display (all) hosts in default (Linux) style -s, --set set a new ARP entry -d, --delete delete a specified entry -v, --verbose be verbose -n, --numeric don't resolve names -i, --device specify network interface (e.g. eth0) -D, --use-device read <hwaddr> from given device -A, -p, --protocol specify protocol family -f, --file read new entries from file or from /etc/ethers <HW>=Use '-H <hw>' to specify hardware address type. Default: ether List of possible hardware types (which support ARP): strip (Metricom Starmode IP) ash (Ash) ether (Ethernet) tr (16/4 Mbps Token Ring) tr (16/4 Mbps Token Ring (New)) ax25 (AMPR AX.25) netrom (AMPR NET/ROM) rose (AMPR ROSE) arcnet (ARCnet) dlci (Frame Relay DLCI) fddi (Fiber Distributed Data Interface) hippi (HIPPI) irda (IrLAP) x25 (generic X.25)
Sample output, using the IP address of the default gateway:
# arp 192.168.1.1 Address HWtype HWaddress Flags Mask Iface 192.168.1.1 ether 00:14:BF:8F:53:2D C eth0