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//go:build integration
// +build integration
package rtnl
import (
"net"
"testing"
"golang.org/x/sys/unix"
)
func TestLiveNeighbours(t *testing.T) {
c, err := Dial(nil)
if err != nil {
t.Fatal(err)
}
defer c.Close()
// Trigger a DNS lookup, only for a side effect of pushing our gateway or NS onto the neighbour table
net.LookupHost("github.com")
neigtab, err := c.Neighbours(nil, 0)
if err != nil {
t.Fatal(err)
}
if len(neigtab) == 0 {
t.Skip("no neighbours")
}
for i, e := range neigtab {
t.Logf("* neighbour table entry [%d]: %v", i, e)
// Ignore neighbor entries in internal/pseudo state.
if e.State == unix.NUD_NONE {
continue
}
// Loopback and p2p interfaces can have neigh entries with a zero IP address.
if e.IP.IsUnspecified() {
continue
}
if e.Interface == nil {
t.Error("nil e.Interface, expected non-nil")
}
if len(e.Interface.Name) == 0 {
t.Error("zero-length e.Interface.Name")
}
// Don't (always) expect hardware address info on entries marked noarp,
// as they include link-local multicast and loopback addresses that are
// valid for all interfaces on the host.
if e.State == unix.NUD_NOARP {
continue
}
if hardwareAddrIsUnspecified(e.HwAddr) {
t.Error("zero e.HwAddr, expected non-zero")
}
if hardwareAddrIsUnspecified(e.Interface.HardwareAddr) {
t.Error("zero e.Interface.HardwareAddr, expected non-zero")
}
}
}
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