package portmapper import ( "net" "strings" "testing" "github.com/docker/docker/libnetwork/iptables" ) func init() { // override this func to mock out the proxy server newProxy = newMockProxyCommand } func TestSetIptablesChain(t *testing.T) { pm := New("") c := &iptables.ChainInfo{ Name: "TEST", } if pm.chain != nil { t.Fatal("chain should be nil at init") } pm.SetIptablesChain(c, "lo") if pm.chain == nil { t.Fatal("chain should not be nil after set") } } func TestMapTCPPorts(t *testing.T) { pm := New("") dstIP1 := net.ParseIP("192.168.0.1") dstIP2 := net.ParseIP("192.168.0.2") dstAddr1 := &net.TCPAddr{IP: dstIP1, Port: 80} dstAddr2 := &net.TCPAddr{IP: dstIP2, Port: 80} srcAddr1 := &net.TCPAddr{Port: 1080, IP: net.ParseIP("172.16.0.1")} srcAddr2 := &net.TCPAddr{Port: 1080, IP: net.ParseIP("172.16.0.2")} addrEqual := func(addr1, addr2 net.Addr) bool { return (addr1.Network() == addr2.Network()) && (addr1.String() == addr2.String()) } if host, err := pm.Map(srcAddr1, dstIP1, 80, true); err != nil { t.Fatalf("Failed to allocate port: %s", err) } else if !addrEqual(dstAddr1, host) { t.Fatalf("Incorrect mapping result: expected %s:%s, got %s:%s", dstAddr1.String(), dstAddr1.Network(), host.String(), host.Network()) } if _, err := pm.Map(srcAddr1, dstIP1, 80, true); err == nil { t.Fatalf("Port is in use - mapping should have failed") } if _, err := pm.Map(srcAddr2, dstIP1, 80, true); err == nil { t.Fatalf("Port is in use - mapping should have failed") } if _, err := pm.Map(srcAddr2, dstIP2, 80, true); err != nil { t.Fatalf("Failed to allocate port: %s", err) } if pm.Unmap(dstAddr1) != nil { t.Fatalf("Failed to release port") } if pm.Unmap(dstAddr2) != nil { t.Fatalf("Failed to release port") } if pm.Unmap(dstAddr2) == nil { t.Fatalf("Port already released, but no error reported") } } func TestGetUDPKey(t *testing.T) { addr := &net.UDPAddr{IP: net.ParseIP("192.168.1.5"), Port: 53} key := getKey(addr) if expected := "192.168.1.5:53/udp"; key != expected { t.Fatalf("expected key %s got %s", expected, key) } } func TestGetTCPKey(t *testing.T) { addr := &net.TCPAddr{IP: net.ParseIP("192.168.1.5"), Port: 80} key := getKey(addr) if expected := "192.168.1.5:80/tcp"; key != expected { t.Fatalf("expected key %s got %s", expected, key) } } func TestGetUDPIPAndPort(t *testing.T) { addr := &net.UDPAddr{IP: net.ParseIP("192.168.1.5"), Port: 53} ip, port := getIPAndPort(addr) if expected := "192.168.1.5"; ip.String() != expected { t.Fatalf("expected ip %s got %s", expected, ip) } if ep := 53; port != ep { t.Fatalf("expected port %d got %d", ep, port) } } func TestMapUDPPorts(t *testing.T) { pm := New("") dstIP1 := net.ParseIP("192.168.0.1") dstIP2 := net.ParseIP("192.168.0.2") dstAddr1 := &net.UDPAddr{IP: dstIP1, Port: 80} dstAddr2 := &net.UDPAddr{IP: dstIP2, Port: 80} srcAddr1 := &net.UDPAddr{Port: 1080, IP: net.ParseIP("172.16.0.1")} srcAddr2 := &net.UDPAddr{Port: 1080, IP: net.ParseIP("172.16.0.2")} addrEqual := func(addr1, addr2 net.Addr) bool { return (addr1.Network() == addr2.Network()) && (addr1.String() == addr2.String()) } if host, err := pm.Map(srcAddr1, dstIP1, 80, true); err != nil { t.Fatalf("Failed to allocate port: %s", err) } else if !addrEqual(dstAddr1, host) { t.Fatalf("Incorrect mapping result: expected %s:%s, got %s:%s", dstAddr1.String(), dstAddr1.Network(), host.String(), host.Network()) } if _, err := pm.Map(srcAddr1, dstIP1, 80, true); err == nil { t.Fatalf("Port is in use - mapping should have failed") } if _, err := pm.Map(srcAddr2, dstIP1, 80, true); err == nil { t.Fatalf("Port is in use - mapping should have failed") } if _, err := pm.Map(srcAddr2, dstIP2, 80, true); err != nil { t.Fatalf("Failed to allocate port: %s", err) } if pm.Unmap(dstAddr1) != nil { t.Fatalf("Failed to release port") } if pm.Unmap(dstAddr2) != nil { t.Fatalf("Failed to release port") } if pm.Unmap(dstAddr2) == nil { t.Fatalf("Port already released, but no error reported") } } func TestMapAllPortsSingleInterface(t *testing.T) { pm := New("") dstIP1 := net.ParseIP("0.0.0.0") srcAddr1 := &net.TCPAddr{Port: 1080, IP: net.ParseIP("172.16.0.1")} hosts := []net.Addr{} var host net.Addr var err error defer func() { for _, val := range hosts { pm.Unmap(val) } }() for i := 0; i < 10; i++ { start, end := pm.Allocator.Begin, pm.Allocator.End for i := start; i < end; i++ { if host, err = pm.Map(srcAddr1, dstIP1, 0, true); err != nil { t.Fatal(err) } hosts = append(hosts, host) } if _, err := pm.Map(srcAddr1, dstIP1, start, true); err == nil { t.Fatalf("Port %d should be bound but is not", start) } for _, val := range hosts { if err := pm.Unmap(val); err != nil { t.Fatal(err) } } hosts = []net.Addr{} } } func TestMapTCPDummyListen(t *testing.T) { pm := New("") dstIP := net.ParseIP("0.0.0.0") dstAddr := &net.TCPAddr{IP: dstIP, Port: 80} // no-op for dummy srcAddr := &net.TCPAddr{Port: 1080, IP: net.ParseIP("172.16.0.1")} addrEqual := func(addr1, addr2 net.Addr) bool { return (addr1.Network() == addr2.Network()) && (addr1.String() == addr2.String()) } if host, err := pm.Map(srcAddr, dstIP, 80, false); err != nil { t.Fatalf("Failed to allocate port: %s", err) } else if !addrEqual(dstAddr, host) { t.Fatalf("Incorrect mapping result: expected %s:%s, got %s:%s", dstAddr.String(), dstAddr.Network(), host.String(), host.Network()) } if _, err := net.Listen("tcp", "0.0.0.0:80"); err == nil { t.Fatal("Listen on mapped port without proxy should fail") } else { if !strings.Contains(err.Error(), "address already in use") { t.Fatalf("Error should be about address already in use, got %v", err) } } if _, err := net.Listen("tcp", "0.0.0.0:81"); err != nil { t.Fatal(err) } if host, err := pm.Map(srcAddr, dstIP, 81, false); err == nil { t.Fatalf("Bound port shouldn't be allocated, but it was on: %v", host) } else { if !strings.Contains(err.Error(), "address already in use") { t.Fatalf("Error should be about address already in use, got %v", err) } } } func TestMapUDPDummyListen(t *testing.T) { pm := New("") dstIP := net.ParseIP("0.0.0.0") dstAddr := &net.UDPAddr{IP: dstIP, Port: 80} // no-op for dummy srcAddr := &net.UDPAddr{Port: 1080, IP: net.ParseIP("172.16.0.1")} addrEqual := func(addr1, addr2 net.Addr) bool { return (addr1.Network() == addr2.Network()) && (addr1.String() == addr2.String()) } if host, err := pm.Map(srcAddr, dstIP, 80, false); err != nil { t.Fatalf("Failed to allocate port: %s", err) } else if !addrEqual(dstAddr, host) { t.Fatalf("Incorrect mapping result: expected %s:%s, got %s:%s", dstAddr.String(), dstAddr.Network(), host.String(), host.Network()) } if _, err := net.ListenUDP("udp", &net.UDPAddr{IP: dstIP, Port: 80}); err == nil { t.Fatal("Listen on mapped port without proxy should fail") } else { if !strings.Contains(err.Error(), "address already in use") { t.Fatalf("Error should be about address already in use, got %v", err) } } if _, err := net.ListenUDP("udp", &net.UDPAddr{IP: dstIP, Port: 81}); err != nil { t.Fatal(err) } if host, err := pm.Map(srcAddr, dstIP, 81, false); err == nil { t.Fatalf("Bound port shouldn't be allocated, but it was on: %v", host) } else { if !strings.Contains(err.Error(), "address already in use") { t.Fatalf("Error should be about address already in use, got %v", err) } } }