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Diffstat (limited to 'pkg/tcpip/stack/stack_test.go')
-rw-r--r--pkg/tcpip/stack/stack_test.go123
1 files changed, 105 insertions, 18 deletions
diff --git a/pkg/tcpip/stack/stack_test.go b/pkg/tcpip/stack/stack_test.go
index d2dede8a9..a2e0a6e7b 100644
--- a/pkg/tcpip/stack/stack_test.go
+++ b/pkg/tcpip/stack/stack_test.go
@@ -952,10 +952,10 @@ func TestSpoofingWithAddress(t *testing.T) {
t.Fatal("FindRoute failed:", err)
}
if r.LocalAddress != nonExistentLocalAddr {
- t.Errorf("Route has wrong local address: got %s, want %s", r.LocalAddress, nonExistentLocalAddr)
+ t.Errorf("got Route.LocalAddress = %s, want = %s", r.LocalAddress, nonExistentLocalAddr)
}
if r.RemoteAddress != dstAddr {
- t.Errorf("Route has wrong remote address: got %s, want %s", r.RemoteAddress, dstAddr)
+ t.Errorf("got Route.RemoteAddress = %s, want = %s", r.RemoteAddress, dstAddr)
}
// Sending a packet works.
testSendTo(t, s, dstAddr, ep, nil)
@@ -967,10 +967,10 @@ func TestSpoofingWithAddress(t *testing.T) {
t.Fatal("FindRoute failed:", err)
}
if r.LocalAddress != localAddr {
- t.Errorf("Route has wrong local address: got %s, want %s", r.LocalAddress, nonExistentLocalAddr)
+ t.Errorf("got Route.LocalAddress = %s, want = %s", r.LocalAddress, nonExistentLocalAddr)
}
if r.RemoteAddress != dstAddr {
- t.Errorf("Route has wrong remote address: got %s, want %s", r.RemoteAddress, dstAddr)
+ t.Errorf("got Route.RemoteAddress = %s, want = %s", r.RemoteAddress, dstAddr)
}
// Sending a packet using the route works.
testSend(t, r, ep, nil)
@@ -1016,17 +1016,33 @@ func TestSpoofingNoAddress(t *testing.T) {
t.Fatal("FindRoute failed:", err)
}
if r.LocalAddress != nonExistentLocalAddr {
- t.Errorf("Route has wrong local address: got %s, want %s", r.LocalAddress, nonExistentLocalAddr)
+ t.Errorf("got Route.LocalAddress = %s, want = %s", r.LocalAddress, nonExistentLocalAddr)
}
if r.RemoteAddress != dstAddr {
- t.Errorf("Route has wrong remote address: got %s, want %s", r.RemoteAddress, dstAddr)
+ t.Errorf("got Route.RemoteAddress = %s, want = %s", r.RemoteAddress, dstAddr)
}
// Sending a packet works.
// FIXME(b/139841518):Spoofing doesn't work if there is no primary address.
// testSendTo(t, s, remoteAddr, ep, nil)
}
-func TestBroadcastNeedsNoRoute(t *testing.T) {
+func verifyRoute(gotRoute, wantRoute stack.Route) error {
+ if gotRoute.LocalAddress != wantRoute.LocalAddress {
+ return fmt.Errorf("bad local address: got %s, want = %s", gotRoute.LocalAddress, wantRoute.LocalAddress)
+ }
+ if gotRoute.RemoteAddress != wantRoute.RemoteAddress {
+ return fmt.Errorf("bad remote address: got %s, want = %s", gotRoute.RemoteAddress, wantRoute.RemoteAddress)
+ }
+ if gotRoute.RemoteLinkAddress != wantRoute.RemoteLinkAddress {
+ return fmt.Errorf("bad remote link address: got %s, want = %s", gotRoute.RemoteLinkAddress, wantRoute.RemoteLinkAddress)
+ }
+ if gotRoute.NextHop != wantRoute.NextHop {
+ return fmt.Errorf("bad next-hop address: got %s, want = %s", gotRoute.NextHop, wantRoute.NextHop)
+ }
+ return nil
+}
+
+func TestOutgoingBroadcastWithEmptyRouteTable(t *testing.T) {
s := stack.New(stack.Options{
NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
})
@@ -1039,28 +1055,99 @@ func TestBroadcastNeedsNoRoute(t *testing.T) {
// If there is no endpoint, it won't work.
if _, err := s.FindRoute(1, header.IPv4Any, header.IPv4Broadcast, fakeNetNumber, false /* multicastLoop */); err != tcpip.ErrNetworkUnreachable {
- t.Fatalf("got FindRoute(1, %v, %v, %v) = %v, want = %s", header.IPv4Any, header.IPv4Broadcast, fakeNetNumber, err, tcpip.ErrNetworkUnreachable)
+ t.Fatalf("got FindRoute(1, %s, %s, %d) = %s, want = %s", header.IPv4Any, header.IPv4Broadcast, fakeNetNumber, err, tcpip.ErrNetworkUnreachable)
}
- if err := s.AddAddress(1, fakeNetNumber, header.IPv4Any); err != nil {
- t.Fatalf("AddAddress(%v, %v) failed: %s", fakeNetNumber, header.IPv4Any, err)
+ protoAddr := tcpip.ProtocolAddress{Protocol: fakeNetNumber, AddressWithPrefix: tcpip.AddressWithPrefix{header.IPv4Any, 0}}
+ if err := s.AddProtocolAddress(1, protoAddr); err != nil {
+ t.Fatalf("AddProtocolAddress(1, %s) failed: %s", protoAddr, err)
}
r, err := s.FindRoute(1, header.IPv4Any, header.IPv4Broadcast, fakeNetNumber, false /* multicastLoop */)
if err != nil {
- t.Fatalf("FindRoute(1, %v, %v, %v) failed: %v", header.IPv4Any, header.IPv4Broadcast, fakeNetNumber, err)
+ t.Fatalf("FindRoute(1, %s, %s, %d) failed: %s", header.IPv4Any, header.IPv4Broadcast, fakeNetNumber, err)
+ }
+ if err := verifyRoute(r, stack.Route{LocalAddress: header.IPv4Any, RemoteAddress: header.IPv4Broadcast}); err != nil {
+ t.Errorf("FindRoute(1, %s, %s, %d) returned unexpected Route: %s)", header.IPv4Any, header.IPv4Broadcast, fakeNetNumber, err)
}
- if r.LocalAddress != header.IPv4Any {
- t.Errorf("Bad local address: got %v, want = %v", r.LocalAddress, header.IPv4Any)
+ // If the NIC doesn't exist, it won't work.
+ if _, err := s.FindRoute(2, header.IPv4Any, header.IPv4Broadcast, fakeNetNumber, false /* multicastLoop */); err != tcpip.ErrNetworkUnreachable {
+ t.Fatalf("got FindRoute(2, %s, %s, %d) = %s want = %s", header.IPv4Any, header.IPv4Broadcast, fakeNetNumber, err, tcpip.ErrNetworkUnreachable)
}
+}
+
+func TestOutgoingBroadcastWithRouteTable(t *testing.T) {
+ defaultAddr := tcpip.AddressWithPrefix{header.IPv4Any, 0}
+ // Local subnet on NIC1: 192.168.1.58/24, gateway 192.168.1.1.
+ nic1Addr := tcpip.AddressWithPrefix{"\xc0\xa8\x01\x3a", 24}
+ nic1Gateway := tcpip.Address("\xc0\xa8\x01\x01")
+ // Local subnet on NIC2: 10.10.10.5/24, gateway 10.10.10.1.
+ nic2Addr := tcpip.AddressWithPrefix{"\x0a\x0a\x0a\x05", 24}
+ nic2Gateway := tcpip.Address("\x0a\x0a\x0a\x01")
- if r.RemoteAddress != header.IPv4Broadcast {
- t.Errorf("Bad remote address: got %v, want = %v", r.RemoteAddress, header.IPv4Broadcast)
+ // Create a new stack with two NICs.
+ s := stack.New(stack.Options{
+ NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()},
+ })
+ ep := channel.New(10, defaultMTU, "")
+ if err := s.CreateNIC(1, ep); err != nil {
+ t.Fatalf("CreateNIC failed: %s", err)
+ }
+ if err := s.CreateNIC(2, ep); err != nil {
+ t.Fatalf("CreateNIC failed: %s", err)
+ }
+ nic1ProtoAddr := tcpip.ProtocolAddress{fakeNetNumber, nic1Addr}
+ if err := s.AddProtocolAddress(1, nic1ProtoAddr); err != nil {
+ t.Fatalf("AddProtocolAddress(1, %s) failed: %s", nic1ProtoAddr, err)
}
- // If the NIC doesn't exist, it won't work.
- if _, err := s.FindRoute(2, header.IPv4Any, header.IPv4Broadcast, fakeNetNumber, false /* multicastLoop */); err != tcpip.ErrNetworkUnreachable {
- t.Fatalf("got FindRoute(2, %v, %v, %v) = %v want = %v", header.IPv4Any, header.IPv4Broadcast, fakeNetNumber, err, tcpip.ErrNetworkUnreachable)
+ nic2ProtoAddr := tcpip.ProtocolAddress{fakeNetNumber, nic2Addr}
+ if err := s.AddProtocolAddress(2, nic2ProtoAddr); err != nil {
+ t.Fatalf("AddAddress(2, %s) failed: %s", nic2ProtoAddr, err)
+ }
+
+ // Set the initial route table.
+ rt := []tcpip.Route{
+ {Destination: nic1Addr.Subnet(), NIC: 1},
+ {Destination: nic2Addr.Subnet(), NIC: 2},
+ {Destination: defaultAddr.Subnet(), Gateway: nic2Gateway, NIC: 2},
+ {Destination: defaultAddr.Subnet(), Gateway: nic1Gateway, NIC: 1},
+ }
+ s.SetRouteTable(rt)
+
+ // When an interface is given, the route for a broadcast goes through it.
+ r, err := s.FindRoute(1, nic1Addr.Address, header.IPv4Broadcast, fakeNetNumber, false /* multicastLoop */)
+ if err != nil {
+ t.Fatalf("FindRoute(1, %s, %s, %d) failed: %s", nic1Addr.Address, header.IPv4Broadcast, fakeNetNumber, err)
+ }
+ if err := verifyRoute(r, stack.Route{LocalAddress: nic1Addr.Address, RemoteAddress: header.IPv4Broadcast}); err != nil {
+ t.Errorf("FindRoute(1, %s, %s, %d) returned unexpected Route: %s)", nic1Addr.Address, header.IPv4Broadcast, fakeNetNumber, err)
+ }
+
+ // When an interface is not given, it consults the route table.
+ // 1. Case: Using the default route.
+ r, err = s.FindRoute(0, "", header.IPv4Broadcast, fakeNetNumber, false /* multicastLoop */)
+ if err != nil {
+ t.Fatalf("FindRoute(0, \"\", %s, %d) failed: %s", header.IPv4Broadcast, fakeNetNumber, err)
+ }
+ if err := verifyRoute(r, stack.Route{LocalAddress: nic2Addr.Address, RemoteAddress: header.IPv4Broadcast}); err != nil {
+ t.Errorf("FindRoute(0, \"\", %s, %d) returned unexpected Route: %s)", header.IPv4Broadcast, fakeNetNumber, err)
+ }
+
+ // 2. Case: Having an explicit route for broadcast will select that one.
+ rt = append(
+ []tcpip.Route{
+ {Destination: tcpip.AddressWithPrefix{header.IPv4Broadcast, 8 * header.IPv4AddressSize}.Subnet(), NIC: 1},
+ },
+ rt...,
+ )
+ s.SetRouteTable(rt)
+ r, err = s.FindRoute(0, "", header.IPv4Broadcast, fakeNetNumber, false /* multicastLoop */)
+ if err != nil {
+ t.Fatalf("FindRoute(0, \"\", %s, %d) failed: %s", header.IPv4Broadcast, fakeNetNumber, err)
+ }
+ if err := verifyRoute(r, stack.Route{LocalAddress: nic1Addr.Address, RemoteAddress: header.IPv4Broadcast}); err != nil {
+ t.Errorf("FindRoute(0, \"\", %s, %d) returned unexpected Route: %s)", header.IPv4Broadcast, fakeNetNumber, err)
}
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 21:21:23 +0000