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On Linux, Netlink provides NDA_CACHEINFO which carries timestamps about when ARP/ND was updated, used, and confirmed. Expose these fields in the Neigh type
42 lines
1.1 KiB
Go
42 lines
1.1 KiB
Go
package netlink
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import (
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"fmt"
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"net"
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)
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// Neigh represents a link layer neighbor from netlink.
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type Neigh struct {
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LinkIndex int
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Family int
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State int
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Type int
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Flags int
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FlagsExt int
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IP net.IP
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HardwareAddr net.HardwareAddr
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LLIPAddr net.IP //Used in the case of NHRP
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Vlan int
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VNI int
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MasterIndex int
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// These values are expressed as "clock ticks ago". To
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// convert these clock ticks to seconds divide by sysconf(_SC_CLK_TCK).
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// When _SC_CLK_TCK is 100, for example, the ndm_* times are expressed
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// in centiseconds.
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Confirmed uint32 // The last time ARP/ND succeeded OR higher layer confirmation was received
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Used uint32 // The last time ARP/ND took place for this neighbor
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Updated uint32 // The time when the current NUD state was entered
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}
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// String returns $ip/$hwaddr $label
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func (neigh *Neigh) String() string {
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return fmt.Sprintf("%s %s", neigh.IP, neigh.HardwareAddr)
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}
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// NeighUpdate is sent when a neighbor changes - type is RTM_NEWNEIGH or RTM_DELNEIGH.
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type NeighUpdate struct {
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Type uint16
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Neigh
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}
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