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add an automated test for UDP port forwarding
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,122 @@ | ||
| package port_forwarder | ||
|
|
||
| import ( | ||
| "net" | ||
| "testing" | ||
|
|
||
| "github.com/sirupsen/logrus" | ||
| "github.com/slackhq/nebula/config" | ||
| "github.com/slackhq/nebula/service" | ||
| "github.com/stretchr/testify/assert" | ||
| ) | ||
|
|
||
| func createPortForwarderFromConfigString(l *logrus.Logger, srv *service.Service, configStr string) (*PortForwardingService, error) { | ||
| c := config.NewC(l) | ||
| err := c.LoadString(configStr) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| fwd_list := NewPortForwardingList() | ||
| err = ParseConfig(l, c, fwd_list) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| pf, err := ConstructFromInitialFwdList(srv, l, &fwd_list) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| err = pf.Activate() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| return pf, nil | ||
| } | ||
|
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| func doTestUdpCommunication( | ||
| t *testing.T, | ||
| msg string, | ||
| senderConn *net.UDPConn, | ||
| toAddr net.Addr, | ||
| receiverConn *net.UDPConn, | ||
| ) (senderAddr net.Addr) { | ||
| data_sent := []byte(msg) | ||
| var n int | ||
| var err error | ||
| if toAddr != nil { | ||
| n, err = senderConn.WriteTo(data_sent, toAddr) | ||
| } else { | ||
| n, err = senderConn.Write(data_sent) | ||
| } | ||
| assert.Nil(t, err) | ||
| assert.Equal(t, n, len(data_sent)) | ||
|
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||
| buf := make([]byte, 100) | ||
| n, senderAddr, err = receiverConn.ReadFrom(buf) | ||
| assert.Nil(t, err) | ||
| assert.Equal(t, n, len(data_sent)) | ||
| assert.Equal(t, data_sent, buf[:n]) | ||
| return | ||
| } | ||
|
|
||
| func TestUdpInOut2Clients(t *testing.T) { | ||
| l := logrus.New() | ||
| server, client := service.CreateTwoConnectedServices() | ||
| defer client.Close() | ||
| defer server.Close() | ||
|
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||
| server_pf, err := createPortForwarderFromConfigString(l, server, ` | ||
| port_forwarding: | ||
| inbound: | ||
| - listen_port: 4499 | ||
| dial_address: 127.0.0.1:5599 | ||
| protocols: [udp] | ||
| `) | ||
| assert.Nil(t, err) | ||
|
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| assert.Len(t, server_pf.portForwardings, 1) | ||
|
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| client_pf, err := createPortForwarderFromConfigString(l, client, ` | ||
| port_forwarding: | ||
| outbound: | ||
| - listen_address: 127.0.0.1:3399 | ||
| dial_address: 10.0.0.1:4499 | ||
| protocols: [udp] | ||
| `) | ||
| assert.Nil(t, err) | ||
|
|
||
| assert.Len(t, client_pf.portForwardings, 1) | ||
|
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||
| client_conn_addr, err := net.ResolveUDPAddr("udp", "127.0.0.1:3399") | ||
| assert.Nil(t, err) | ||
| server_conn_addr, err := net.ResolveUDPAddr("udp", "127.0.0.1:5599") | ||
| assert.Nil(t, err) | ||
|
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||
| server_listen_conn, err := net.ListenUDP("udp", server_conn_addr) | ||
| assert.Nil(t, err) | ||
| client1_conn, err := net.DialUDP("udp", nil, client_conn_addr) | ||
| assert.Nil(t, err) | ||
| client2_conn, err := net.DialUDP("udp", nil, client_conn_addr) | ||
| assert.Nil(t, err) | ||
|
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| client1_addr := doTestUdpCommunication(t, "Hello from client 1 side!", | ||
| client1_conn, nil, server_listen_conn) | ||
| assert.NotNil(t, client1_addr) | ||
| client2_addr := doTestUdpCommunication(t, "Hello from client two side!", | ||
| client2_conn, nil, server_listen_conn) | ||
| assert.NotNil(t, client2_addr) | ||
|
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| doTestUdpCommunication(t, "Hello from server first side!", | ||
| server_listen_conn, client1_addr, client1_conn) | ||
| doTestUdpCommunication(t, "Hello from server second side!", | ||
| server_listen_conn, client2_addr, client2_conn) | ||
| doTestUdpCommunication(t, "Hello from server third side!", | ||
| server_listen_conn, client1_addr, client1_conn) | ||
|
|
||
| doTestUdpCommunication(t, "Hello from client two side AGAIN!", | ||
| client2_conn, nil, server_listen_conn) | ||
|
|
||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| package service | ||
|
|
||
| import ( | ||
| "net/netip" | ||
| "time" | ||
|
|
||
| "dario.cat/mergo" | ||
| "github.com/sirupsen/logrus" | ||
| "github.com/slackhq/nebula/cert" | ||
| "github.com/slackhq/nebula/config" | ||
| "github.com/slackhq/nebula/e2e" | ||
| "gopkg.in/yaml.v2" | ||
| ) | ||
|
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| type m map[string]interface{} | ||
|
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| func newSimpleService(caCrt *cert.NebulaCertificate, caKey []byte, name string, udpIp netip.Addr, overrides m) *Service { | ||
| _, _, myPrivKey, myPEM := e2e.NewTestCert(caCrt, caKey, "a", time.Now(), time.Now().Add(5*time.Minute), netip.PrefixFrom(udpIp, 24), nil, []string{}) | ||
| caB, err := caCrt.MarshalToPEM() | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
|
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| mc := m{ | ||
| "pki": m{ | ||
| "ca": string(caB), | ||
| "cert": string(myPEM), | ||
| "key": string(myPrivKey), | ||
| }, | ||
| //"tun": m{"disabled": true}, | ||
| "firewall": m{ | ||
| "outbound": []m{{ | ||
| "proto": "any", | ||
| "port": "any", | ||
| "host": "any", | ||
| }}, | ||
| "inbound": []m{{ | ||
| "proto": "any", | ||
| "port": "any", | ||
| "host": "any", | ||
| }}, | ||
| }, | ||
| "timers": m{ | ||
| "pending_deletion_interval": 2, | ||
| "connection_alive_interval": 2, | ||
| }, | ||
| "handshakes": m{ | ||
| "try_interval": "200ms", | ||
| }, | ||
| } | ||
|
|
||
| if overrides != nil { | ||
| err = mergo.Merge(&overrides, mc, mergo.WithAppendSlice) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| mc = overrides | ||
| } | ||
|
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| cb, err := yaml.Marshal(mc) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
|
|
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| var c config.C | ||
| if err := c.LoadString(string(cb)); err != nil { | ||
| panic(err) | ||
| } | ||
|
|
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| l := logrus.New() | ||
| s, err := New(&c, l) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| return s | ||
| } | ||
|
|
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| func CreateTwoConnectedServices() (*Service, *Service) { | ||
| ca, _, caKey, _ := e2e.NewTestCaCert(time.Now(), time.Now().Add(10*time.Minute), nil, nil, []string{}) | ||
| a := newSimpleService(ca, caKey, "a", netip.MustParseAddr("10.0.0.1"), m{ | ||
| "static_host_map": m{}, | ||
| "lighthouse": m{ | ||
| "am_lighthouse": true, | ||
| }, | ||
| "listen": m{ | ||
| "host": "0.0.0.0", | ||
| "port": 4243, | ||
| }, | ||
| }) | ||
| b := newSimpleService(ca, caKey, "b", netip.MustParseAddr("10.0.0.2"), m{ | ||
| "static_host_map": m{ | ||
| "10.0.0.1": []string{"localhost:4243"}, | ||
| }, | ||
| "lighthouse": m{ | ||
| "hosts": []string{"10.0.0.1"}, | ||
| "interval": 1, | ||
| }, | ||
| }) | ||
| return a, b | ||
| } |