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NAME
ARP (Address Resolution Protocol)
SPECIFICATION
D. Plummer. An Ethernet Address Resolution Protocol.
Request for Comments 826, USC Information Sciences Institute, Marina
del Ray, Calif., Nov. 1982.
SYNOPSIS
ARP translates IP addresses into ethernet addresses, and
vice versa (i.e., it also implements RARP). This implementation of
ARP supports a single interface, but may be multiply instantiated to
support several network interfaces.
REALM
ARP is in the CONTROL realm. There are no ARP sessions -- control
operations may be performed on the protocol object only.
CONTROL OPERATIONS
- RESOLVE:
-
Maps an IP address into an ethernet address.
- Input:
- IPhost
- Output:
- ETHhost
- RRESOLVE:
-
Maps an ethernet address into an IP address.
- Input:
- ETHhost
- Output:
- IPhost
- ARP_INSTALL:
-
Installs an IP address to ETH address binding.
- Input:
- ArpBinding == {ETHhost eth; IPhost ip;}
- Output:
- none
- ARP_GETMYBINDING:
-
Return the IP and ETH address of the local host for the interface.
- Input:
- none
- Output:
- ArpBinding == {ETHhost eth; IPhost ip;}
- ARP_FOREACH:
-
This is a kludge to allow non-broadcast device drivers, such as
SIMETH, to simulate broadcast without having to keep their own tables
of reachable hosts. When the ARP_FOREACH control operation is
invoked, ARP will call-back the invoking protocol once for each
binding in its table.
- Input:
- ArpForEach == { void *arg; ArpForEachFunc f; }
- Output:
- none
typedef int (ArpForEachFunc)
(
ArpBinding *,
void *
);
- ETH_REGISTER_ARP:
-
ARP invokes this control operation on its lower protocol at
initialization time so the driver knows which protocol to use if it
has to invoke an ARP_FOREACH. This is not pretty.
- Input:
- XObj
- Output:
- none
CONFIGURATION
name=arp protocols=eth;
AUTHORS
Larry Peterson and Norm Hutchinson
Next: ASP
Up: Protocol Specifications
Previous: Protocol Specifications
Larry Peterson
Tue Jul 1 14:50:34 MST 1997