arp

package module

v1.0.1 Latest Latest Go to latest Published: Nov 12, 2025 License: MIT Imports: 7 Imported by: 1

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Package arp queries the system ARP cache.

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var DefaultResolver = &Resolver{TTL: 100 * time.Millisecond}

DefaultResolver is the resolver used by the package-level Lookup functions.

func LookupIP(hw net.HardwareAddr) (net.IP, error)

LookupIP returns the IP address associated with the given hardware address, as recorded in the system ARP cache.

func LookupMAC(ip net.IP) (net.HardwareAddr, error)

LookupMAC returns the hardware address associated with the given IP address, as recorded in the system ARP cache.

type Resolver struct {
	// TTL is the minimum time between updates.
	TTL time.Duration
	// contains filtered or unexported fields
}

func (r *Resolver) LookupIP(hw net.HardwareAddr) (net.IP, error)

LookupIP returns the IP address associated with the given hardware address, as recorded in the system ARP cache.

func (r *Resolver) LookupMAC(ip net.IP) (net.HardwareAddr, error)

LookupMAC returns the hardware address associated with the given IP address, as recorded in the system ARP cache.

type Table map[string]string

func ReadTable(filename string) (Table, error)