Use tcpip.Subnet in tcpip.Route

This is the first step in replacing some of the redundant types with the
standard library equivalents.

PiperOrigin-RevId: 264706552

1 files changed, 17 insertions, 11 deletions

diff --git a/pkg/tcpip/network/ipv4/ipv4_test.go b/pkg/tcpip/network/ipv4/ipv4_test.go
index 3207a3d46..1b5a55bea 100644
--- a/pkg/tcpip/network/ipv4/ipv4_test.go
+++ b/pkg/tcpip/network/ipv4/ipv4_test.go
@@ -52,9 +52,7 @@ func TestExcludeBroadcast(t *testing.T) {
 	}
 
 	s.SetRouteTable([]tcpip.Route{{
-		Destination: "\x00\x00\x00\x00",
-		Mask:        "\x00\x00\x00\x00",
-		Gateway:     "",
+		Destination: header.IPv4EmptySubnet,
 		NIC:         1,
 	}})
 
@@ -247,14 +245,22 @@ func buildContext(t *testing.T, packetCollectorErrors []*tcpip.Error, mtu uint32
 	_, linkEP := newErrorChannel(100 /* Enough for all tests. */, mtu, "", packetCollectorErrors)
 	linkEPId := stack.RegisterLinkEndpoint(linkEP)
 	s.CreateNIC(1, linkEPId)
-	s.AddAddress(1, ipv4.ProtocolNumber, "\x10\x00\x00\x01")
-	s.SetRouteTable([]tcpip.Route{{
-		Destination: "\x10\x00\x00\x02",
-		Mask:        "\xff\xff\xff\xff",
-		Gateway:     "",
-		NIC:         1,
-	}})
-	r, err := s.FindRoute(0, "\x10\x00\x00\x01", "\x10\x00\x00\x02", ipv4.ProtocolNumber, false /* multicastLoop */)
+	const (
+		src = "\x10\x00\x00\x01"
+		dst = "\x10\x00\x00\x02"
+	)
+	s.AddAddress(1, ipv4.ProtocolNumber, src)
+	{
+		subnet, err := tcpip.NewSubnet(dst, tcpip.AddressMask(header.IPv4Broadcast))
+		if err != nil {
+			t.Fatal(err)
+		}
+		s.SetRouteTable([]tcpip.Route{{
+			Destination: subnet,
+			NIC:         1,
+		}})
+	}
+	r, err := s.FindRoute(0, src, dst, ipv4.ProtocolNumber, false /* multicastLoop */)
 	if err != nil {
 		t.Fatalf("s.FindRoute got %v, want %v", err, nil)
 	}