github.com/Psiphon-Labs/psiphon-tunnel-core@v2.0.28+incompatible/psiphon/server/sessionID_test.go (about) 1 /* 2 * Copyright (c) 2016, Psiphon Inc. 3 * All rights reserved. 4 * 5 * This program is free software: you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation, either version 3 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program. If not, see <http://www.gnu.org/licenses/>. 17 * 18 */ 19 20 package server 21 22 import ( 23 "context" 24 "encoding/json" 25 "fmt" 26 "io/ioutil" 27 "os" 28 "path/filepath" 29 "strings" 30 "sync" 31 "testing" 32 "time" 33 34 "github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon" 35 "github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon/common" 36 "github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon/common/protocol" 37 ) 38 39 func TestDuplicateSessionID(t *testing.T) { 40 41 testDataDirName, err := ioutil.TempDir("", "psiphond-duplicate-session-id-test") 42 if err != nil { 43 t.Fatalf("TempDir failed: %s", err) 44 } 45 defer os.RemoveAll(testDataDirName) 46 47 psiphon.SetEmitDiagnosticNotices(true, true) 48 49 // Configure server 50 51 generateConfigParams := &GenerateConfigParams{ 52 ServerIPAddress: "127.0.0.1", 53 EnableSSHAPIRequests: true, 54 WebServerPort: 8000, 55 TunnelProtocolPorts: map[string]int{"OSSH": 4000}, 56 } 57 58 serverConfigJSON, _, _, _, encodedServerEntry, err := GenerateConfig(generateConfigParams) 59 if err != nil { 60 t.Fatalf("error generating server config: %s", err) 61 } 62 63 var serverConfig map[string]interface{} 64 json.Unmarshal(serverConfigJSON, &serverConfig) 65 66 serverConfig["LogFilename"] = filepath.Join(testDataDirName, "psiphond.log") 67 serverConfig["LogLevel"] = "debug" 68 69 serverConfigJSON, _ = json.Marshal(serverConfig) 70 71 numConcurrentClients := 50 72 73 stoppingEvent := "stopping existing client with duplicate session ID" 74 abortingEvent := "aborting new client with duplicate session ID" 75 76 // Sufficiently buffer channel so log callback handler doesn't cause server 77 // operations to block while handling concurrent clients. 78 duplicateSessionIDEvents := make(chan string, numConcurrentClients) 79 80 setLogCallback(func(log []byte) { 81 strLog := string(log) 82 var event string 83 if strings.Contains(strLog, stoppingEvent) { 84 event = stoppingEvent 85 } else if strings.Contains(strLog, abortingEvent) { 86 event = abortingEvent 87 } 88 if event != "" { 89 select { 90 case duplicateSessionIDEvents <- event: 91 default: 92 } 93 } 94 95 }) 96 97 // Run server 98 99 serverWaitGroup := new(sync.WaitGroup) 100 serverWaitGroup.Add(1) 101 go func() { 102 defer serverWaitGroup.Done() 103 err := RunServices(serverConfigJSON) 104 if err != nil { 105 t.Errorf("error running server: %s", err) 106 } 107 }() 108 109 defer func() { 110 p, _ := os.FindProcess(os.Getpid()) 111 p.Signal(os.Interrupt) 112 serverWaitGroup.Wait() 113 }() 114 115 // TODO: monitor logs for more robust wait-until-loaded. 116 time.Sleep(1 * time.Second) 117 118 // Initialize tunnel clients. Bypassing Controller and using Tunnel directly 119 // to permit multiple concurrent clients. 120 // 121 // Limitation: all tunnels still use one singleton datastore and notice 122 // handler. 123 124 psiphon.SetNoticeWriter(ioutil.Discard) 125 126 clientConfigJSONTemplate := ` 127 { 128 "DataRootDirectory" : "%s", 129 "SponsorId" : "0", 130 "PropagationChannelId" : "0", 131 "SessionID" : "00000000000000000000000000000000" 132 }` 133 134 clientConfigJSON := fmt.Sprintf( 135 clientConfigJSONTemplate, 136 testDataDirName) 137 138 clientConfig, err := psiphon.LoadConfig([]byte(clientConfigJSON)) 139 if err != nil { 140 t.Fatalf("LoadConfig failed: %s", err) 141 } 142 err = clientConfig.Commit(false) 143 if err != nil { 144 t.Fatalf("Commit failed: %s", err) 145 } 146 147 resolver := psiphon.NewResolver(clientConfig, true) 148 defer resolver.Stop() 149 clientConfig.SetResolver(resolver) 150 151 err = psiphon.OpenDataStore(clientConfig) 152 if err != nil { 153 t.Fatalf("OpenDataStore failed: %s", err) 154 } 155 defer psiphon.CloseDataStore() 156 157 serverEntry, err := protocol.DecodeServerEntry( 158 string(encodedServerEntry), 159 common.GetCurrentTimestamp(), 160 protocol.SERVER_ENTRY_SOURCE_EMBEDDED) 161 if err != nil { 162 t.Fatalf("DecodeServerEntry failed: %s", err) 163 } 164 165 dialTunnel := func(ctx context.Context) *psiphon.Tunnel { 166 167 dialParams, err := psiphon.MakeDialParameters( 168 clientConfig, 169 nil, 170 func(_ *protocol.ServerEntry, _ string) bool { return false }, 171 func(_ *protocol.ServerEntry) (string, bool) { return "OSSH", true }, 172 serverEntry, 173 false, 174 0, 175 0) 176 if err != nil { 177 t.Fatalf("MakeDialParameters failed: %s", err) 178 } 179 180 tunnel, err := psiphon.ConnectTunnel( 181 ctx, 182 clientConfig, 183 time.Now(), 184 dialParams) 185 if err != nil { 186 t.Fatalf("ConnectTunnel failed: %s", err) 187 } 188 189 return tunnel 190 } 191 192 handshakeTunnel := func(tunnel *psiphon.Tunnel, expectSuccess bool) { 193 194 _, err = psiphon.NewServerContext(tunnel) 195 196 if expectSuccess && err != nil || (!expectSuccess && err == nil) { 197 t.Fatalf("Unexpected handshake result: %s", err) 198 } 199 } 200 201 ctx, cancelFunc := context.WithCancel(context.Background()) 202 defer cancelFunc() 203 204 // Test: normal case 205 // 206 // First tunnel, t1, fully establishes and then is superceded by new tunnel, t2. 207 208 t1 := dialTunnel(ctx) 209 210 handshakeTunnel(t1, true) 211 212 t2 := dialTunnel(ctx) 213 214 expectEvent := <-duplicateSessionIDEvents 215 216 if expectEvent != stoppingEvent { 217 t.Fatalf("Unexpected duplicate session ID event") 218 } 219 220 handshakeTunnel(t2, true) 221 222 t1.Close(true) 223 t2.Close(true) 224 225 // Test: simultaneous/interleaved case 226 // 227 // First tunnel connects but then tries to handshake after second tunnel has 228 // connected. 229 230 t1 = dialTunnel(ctx) 231 232 // TODO: await log confirmation that t1 completed registerEstablishedClient? 233 // Otherwise, there's some small chance that t2 is the "first" tunnel and the 234 // test could fail (false negative). 235 236 t2 = dialTunnel(ctx) 237 238 expectEvent = <-duplicateSessionIDEvents 239 240 if expectEvent != stoppingEvent { 241 t.Fatalf("Unexpected duplicate session ID event") 242 } 243 244 handshakeTunnel(t1, false) 245 246 handshakeTunnel(t2, true) 247 248 t1.Close(true) 249 t2.Close(true) 250 251 // Test: 50 concurrent clients, all with the same session ID. 252 // 253 // This should be enough concurrent clients to trigger both the "stopping" 254 // and "aborting" duplicate session ID cases. 255 256 tunnels := make([]*psiphon.Tunnel, numConcurrentClients) 257 258 waitGroup := new(sync.WaitGroup) 259 for i := 0; i < numConcurrentClients; i++ { 260 waitGroup.Add(1) 261 go func(i int) { 262 defer waitGroup.Done() 263 tunnels[i] = dialTunnel(ctx) 264 }(i) 265 } 266 waitGroup.Wait() 267 268 for _, t := range tunnels { 269 if t == nil { 270 continue 271 } 272 t.Close(true) 273 } 274 275 receivedEvents := make(map[string]int) 276 for i := 0; i < numConcurrentClients-1; i++ { 277 receivedEvents[<-duplicateSessionIDEvents] += 1 278 } 279 280 if receivedEvents[stoppingEvent] < 1 { 281 t.Fatalf("No stopping events received") 282 } 283 284 if receivedEvents[abortingEvent] < 1 { 285 t.Fatalf("No aborting events received") 286 } 287 }