dhcp6_test: add new DHCPv6 infra packet capture

internal/dhcp6/dhcp6_test.go

@@ -27,11 +27,35 @@ import (
 )
 
 func TestDHCP6(t *testing.T) {
+	for _, tt := range []struct {
+		CaptureFile string
+		SolicitTID  dhcpv6.TransactionID
+		RequestTID  dhcpv6.TransactionID
+		Prefix      net.IPNet
+		Expiry      time.Duration
+	}{
+		{
+			CaptureFile: "fiber7.pcap",
+			SolicitTID:  dhcpv6.TransactionID{0x48, 0xe5, 0x9e},
+			RequestTID:  dhcpv6.TransactionID{0x73, 0x8c, 0x3b},
+			Prefix:      mustParseCIDR("2a02:168:4a00::/48"),
+			Expiry:      20 * time.Minute,
+		},
+
+		{
+			CaptureFile: "fiber7-2019-12-02.pcap",
+			SolicitTID:  dhcpv6.TransactionID{0x49, 0xb4, 0x8c},
+			RequestTID:  dhcpv6.TransactionID{0x49, 0xb4, 0x8c},
+			Prefix:      mustParseCIDR("2a02:168:4bf3::/48"),
+			Expiry:      1000 * time.Second,
+		},
+	} {
+		t.Run(tt.CaptureFile, func(t *testing.T) {
 			pcappath := os.Getenv("ROUTER7_PCAP_DIR")
 			if pcappath != "" {
 				pcappath = filepath.Join(pcappath, "dhcp6.pcap")
 			}
-	conn, err := pcapreplayer.NewPacketConn("testdata/fiber7.pcap", pcappath)
+			conn, err := pcapreplayer.NewPacketConn("testdata/"+tt.CaptureFile, pcappath)
 			if err != nil {
 				t.Fatal(err)
 			}
@@ -48,8 +72,8 @@ func TestDHCP6(t *testing.T) {
 				LocalAddr:     laddr,
 				Conn:          conn,
 				TransactionIDs: []dhcpv6.TransactionID{
-			{0x48, 0xe5, 0x9e}, // SOLICIT
-			{0x73, 0x8c, 0x3b}, // REQUEST
+					tt.SolicitTID,
+					tt.RequestTID,
 				},
 				HardwareAddr: []byte{0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66},
 			})
@@ -64,9 +88,9 @@ func TestDHCP6(t *testing.T) {
 			}
 			got := c.Config()
 			want := Config{
-		RenewAfter: now.Add(20 * time.Minute),
+				RenewAfter: now.Add(tt.Expiry),
 				Prefixes: []net.IPNet{
-			mustParseCIDR("2a02:168:4a00::/48"),
+					tt.Prefix,
 				},
 				DNS: []string{
 					"2001:1620:2777:1::10",
@@ -76,6 +100,8 @@ func TestDHCP6(t *testing.T) {
 			if diff := cmp.Diff(want, got); diff != "" {
 				t.Fatalf("unexpected config: diff (-want +got):\n%s", diff)
 			}
+		})
+	}
 }
 
 func mustParseCIDR(s string) net.IPNet {