all: sync with master; upd chlog

internal/arpdb/arpdb_linux_internal_test.go

@@ -0,0 +1,102 @@
+//go:build linux
+
+package arpdb
+
+import (
+	"net"
+	"net/netip"
+	"sync"
+	"testing"
+	"testing/fstest"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+const arpAOutputWrt = `
+IP address    HW type     Flags       HW address            Mask     Device
+1.2.3.4.5     0x1         0x2         aa:bb:cc:dd:ee:ff     *        wan
+1.2.3.4       0x1         0x2         12:34:56:78:910       *        wan
+192.168.1.2   0x1         0x2         ab:cd:ef:ab:cd:ef     *        wan
+::ffff:ffff   0x1         0x2         ef:cd:ab:ef:cd:ab     *        wan`
+
+const arpAOutput = `
+invalid.mac (1.2.3.4) at 12:34:56:78:910 on el0 ifscope [ethernet]
+invalid.ip  (1.2.3.4.5) at ab:cd:ef:ab:cd:12 on ek0 ifscope [ethernet]
+invalid.fmt 1 at 12:cd:ef:ab:cd:ef on er0 ifscope [ethernet]
+? (192.168.1.2) at ab:cd:ef:ab:cd:ef on en0 ifscope [ethernet]
+? (::ffff:ffff) at ef:cd:ab:ef:cd:ab on em0 expires in 100 seconds [ethernet]`
+
+const ipNeighOutput = `
+1.2.3.4.5 dev enp0s3 lladdr aa:bb:cc:dd:ee:ff DELAY
+1.2.3.4 dev enp0s3 lladdr 12:34:56:78:910 DELAY
+192.168.1.2 dev enp0s3 lladdr ab:cd:ef:ab:cd:ef DELAY
+::ffff:ffff dev enp0s3 lladdr ef:cd:ab:ef:cd:ab router STALE`
+
+var wantNeighs = []Neighbor{{
+	IP:  netip.MustParseAddr("192.168.1.2"),
+	MAC: net.HardwareAddr{0xAB, 0xCD, 0xEF, 0xAB, 0xCD, 0xEF},
+}, {
+	IP:  netip.MustParseAddr("::ffff:ffff"),
+	MAC: net.HardwareAddr{0xEF, 0xCD, 0xAB, 0xEF, 0xCD, 0xAB},
+}}
+
+func TestFSysARPDB(t *testing.T) {
+	require.NoError(t, fstest.TestFS(testdata, "proc_net_arp"))
+
+	a := &fsysARPDB{
+		ns: &neighs{
+			mu: &sync.RWMutex{},
+			ns: make([]Neighbor, 0),
+		},
+		fsys:     testdata,
+		filename: "proc_net_arp",
+	}
+
+	err := a.Refresh()
+	require.NoError(t, err)
+
+	ns := a.Neighbors()
+	assert.Equal(t, wantNeighs, ns)
+}
+
+func TestCmdARPDB_linux(t *testing.T) {
+	sh := mapShell{
+		"arp -a":   {err: nil, out: arpAOutputWrt, code: 0},
+		"ip neigh": {err: nil, out: ipNeighOutput, code: 0},
+	}
+	substShell(t, sh.RunCmd)
+
+	t.Run("wrt", func(t *testing.T) {
+		a := &cmdARPDB{
+			parse: parseArpAWrt,
+			cmd:   "arp",
+			args:  []string{"-a"},
+			ns: &neighs{
+				mu: &sync.RWMutex{},
+				ns: make([]Neighbor, 0),
+			},
+		}
+
+		err := a.Refresh()
+		require.NoError(t, err)
+
+		assert.Equal(t, wantNeighs, a.Neighbors())
+	})
+
+	t.Run("ip_neigh", func(t *testing.T) {
+		a := &cmdARPDB{
+			parse: parseIPNeigh,
+			cmd:   "ip",
+			args:  []string{"neigh"},
+			ns: &neighs{
+				mu: &sync.RWMutex{},
+				ns: make([]Neighbor, 0),
+			},
+		}
+		err := a.Refresh()
+		require.NoError(t, err)
+
+		assert.Equal(t, wantNeighs, a.Neighbors())
+	})
+}