gitlab.com/yannislg/go-pulse@v0.0.0-20210722055913-a3e24e95638d/p2p/discover/v4_udp_test.go (about) 1 // Copyright 2015 The go-ethereum Authors 2 // This file is part of the go-ethereum library. 3 // 4 // The go-ethereum library is free software: you can redistribute it and/or modify 5 // it under the terms of the GNU Lesser General Public License as published by 6 // the Free Software Foundation, either version 3 of the License, or 7 // (at your option) any later version. 8 // 9 // The go-ethereum library is distributed in the hope that it will be useful, 10 // but WITHOUT ANY WARRANTY; without even the implied warranty of 11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 // GNU Lesser General Public License for more details. 13 // 14 // You should have received a copy of the GNU Lesser General Public License 15 // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. 16 17 package discover 18 19 import ( 20 "bytes" 21 "crypto/ecdsa" 22 crand "crypto/rand" 23 "encoding/binary" 24 "encoding/hex" 25 "errors" 26 "io" 27 "math/rand" 28 "net" 29 "reflect" 30 "sync" 31 "testing" 32 "time" 33 34 "github.com/davecgh/go-spew/spew" 35 "github.com/ethereum/go-ethereum/common" 36 "github.com/ethereum/go-ethereum/crypto" 37 "github.com/ethereum/go-ethereum/internal/testlog" 38 "github.com/ethereum/go-ethereum/log" 39 "github.com/ethereum/go-ethereum/p2p/enode" 40 "github.com/ethereum/go-ethereum/p2p/enr" 41 "github.com/ethereum/go-ethereum/rlp" 42 ) 43 44 // shared test variables 45 var ( 46 futureExp = uint64(time.Now().Add(10 * time.Hour).Unix()) 47 testTarget = encPubkey{0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1} 48 testRemote = rpcEndpoint{IP: net.ParseIP("1.1.1.1").To4(), UDP: 1, TCP: 2} 49 testLocalAnnounced = rpcEndpoint{IP: net.ParseIP("2.2.2.2").To4(), UDP: 3, TCP: 4} 50 testLocal = rpcEndpoint{IP: net.ParseIP("3.3.3.3").To4(), UDP: 5, TCP: 6} 51 ) 52 53 type udpTest struct { 54 t *testing.T 55 pipe *dgramPipe 56 table *Table 57 db *enode.DB 58 udp *UDPv4 59 sent [][]byte 60 localkey, remotekey *ecdsa.PrivateKey 61 remoteaddr *net.UDPAddr 62 } 63 64 func newUDPTest(t *testing.T) *udpTest { 65 test := &udpTest{ 66 t: t, 67 pipe: newpipe(), 68 localkey: newkey(), 69 remotekey: newkey(), 70 remoteaddr: &net.UDPAddr{IP: net.IP{10, 0, 1, 99}, Port: 30303}, 71 } 72 73 test.db, _ = enode.OpenDB("") 74 ln := enode.NewLocalNode(test.db, test.localkey) 75 test.udp, _ = ListenV4(test.pipe, ln, Config{ 76 PrivateKey: test.localkey, 77 Log: testlog.Logger(t, log.LvlTrace), 78 }) 79 test.table = test.udp.tab 80 // Wait for initial refresh so the table doesn't send unexpected findnode. 81 <-test.table.initDone 82 return test 83 } 84 85 func (test *udpTest) close() { 86 test.udp.Close() 87 test.db.Close() 88 } 89 90 // handles a packet as if it had been sent to the transport. 91 func (test *udpTest) packetIn(wantError error, data packetV4) { 92 test.t.Helper() 93 94 test.packetInFrom(wantError, test.remotekey, test.remoteaddr, data) 95 } 96 97 // handles a packet as if it had been sent to the transport by the key/endpoint. 98 func (test *udpTest) packetInFrom(wantError error, key *ecdsa.PrivateKey, addr *net.UDPAddr, data packetV4) { 99 test.t.Helper() 100 101 enc, _, err := test.udp.encode(key, data) 102 if err != nil { 103 test.t.Errorf("%s encode error: %v", data.name(), err) 104 } 105 test.sent = append(test.sent, enc) 106 if err = test.udp.handlePacket(addr, enc); err != wantError { 107 test.t.Errorf("error mismatch: got %q, want %q", err, wantError) 108 } 109 } 110 111 // waits for a packet to be sent by the transport. 112 // validate should have type func(X, *net.UDPAddr, []byte), where X is a packet type. 113 func (test *udpTest) waitPacketOut(validate interface{}) (closed bool) { 114 test.t.Helper() 115 116 dgram, err := test.pipe.receive() 117 if err == errClosed { 118 return true 119 } else if err != nil { 120 test.t.Error("packet receive error:", err) 121 return false 122 } 123 p, _, hash, err := decodeV4(dgram.data) 124 if err != nil { 125 test.t.Errorf("sent packet decode error: %v", err) 126 return false 127 } 128 fn := reflect.ValueOf(validate) 129 exptype := fn.Type().In(0) 130 if !reflect.TypeOf(p).AssignableTo(exptype) { 131 test.t.Errorf("sent packet type mismatch, got: %v, want: %v", reflect.TypeOf(p), exptype) 132 return false 133 } 134 fn.Call([]reflect.Value{reflect.ValueOf(p), reflect.ValueOf(&dgram.to), reflect.ValueOf(hash)}) 135 return false 136 } 137 138 func TestUDPv4_packetErrors(t *testing.T) { 139 test := newUDPTest(t) 140 defer test.close() 141 142 test.packetIn(errExpired, &pingV4{From: testRemote, To: testLocalAnnounced, Version: 4}) 143 test.packetIn(errUnsolicitedReply, &pongV4{ReplyTok: []byte{}, Expiration: futureExp}) 144 test.packetIn(errUnknownNode, &findnodeV4{Expiration: futureExp}) 145 test.packetIn(errUnsolicitedReply, &neighborsV4{Expiration: futureExp}) 146 } 147 148 func TestUDPv4_pingTimeout(t *testing.T) { 149 t.Parallel() 150 test := newUDPTest(t) 151 defer test.close() 152 153 key := newkey() 154 toaddr := &net.UDPAddr{IP: net.ParseIP("1.2.3.4"), Port: 2222} 155 node := enode.NewV4(&key.PublicKey, toaddr.IP, 0, toaddr.Port) 156 if _, err := test.udp.ping(node); err != errTimeout { 157 t.Error("expected timeout error, got", err) 158 } 159 } 160 161 type testPacket byte 162 163 func (req testPacket) kind() byte { return byte(req) } 164 func (req testPacket) name() string { return "" } 165 func (req testPacket) preverify(*UDPv4, *net.UDPAddr, enode.ID, encPubkey) error { 166 return nil 167 } 168 func (req testPacket) handle(*UDPv4, *net.UDPAddr, enode.ID, []byte) { 169 } 170 171 func TestUDPv4_responseTimeouts(t *testing.T) { 172 t.Parallel() 173 test := newUDPTest(t) 174 defer test.close() 175 176 rand.Seed(time.Now().UnixNano()) 177 randomDuration := func(max time.Duration) time.Duration { 178 return time.Duration(rand.Int63n(int64(max))) 179 } 180 181 var ( 182 nReqs = 200 183 nTimeouts = 0 // number of requests with ptype > 128 184 nilErr = make(chan error, nReqs) // for requests that get a reply 185 timeoutErr = make(chan error, nReqs) // for requests that time out 186 ) 187 for i := 0; i < nReqs; i++ { 188 // Create a matcher for a random request in udp.loop. Requests 189 // with ptype <= 128 will not get a reply and should time out. 190 // For all other requests, a reply is scheduled to arrive 191 // within the timeout window. 192 p := &replyMatcher{ 193 ptype: byte(rand.Intn(255)), 194 callback: func(interface{}) (bool, bool) { return true, true }, 195 } 196 binary.BigEndian.PutUint64(p.from[:], uint64(i)) 197 if p.ptype <= 128 { 198 p.errc = timeoutErr 199 test.udp.addReplyMatcher <- p 200 nTimeouts++ 201 } else { 202 p.errc = nilErr 203 test.udp.addReplyMatcher <- p 204 time.AfterFunc(randomDuration(60*time.Millisecond), func() { 205 if !test.udp.handleReply(p.from, p.ip, testPacket(p.ptype)) { 206 t.Logf("not matched: %v", p) 207 } 208 }) 209 } 210 time.Sleep(randomDuration(30 * time.Millisecond)) 211 } 212 213 // Check that all timeouts were delivered and that the rest got nil errors. 214 // The replies must be delivered. 215 var ( 216 recvDeadline = time.After(20 * time.Second) 217 nTimeoutsRecv, nNil = 0, 0 218 ) 219 for i := 0; i < nReqs; i++ { 220 select { 221 case err := <-timeoutErr: 222 if err != errTimeout { 223 t.Fatalf("got non-timeout error on timeoutErr %d: %v", i, err) 224 } 225 nTimeoutsRecv++ 226 case err := <-nilErr: 227 if err != nil { 228 t.Fatalf("got non-nil error on nilErr %d: %v", i, err) 229 } 230 nNil++ 231 case <-recvDeadline: 232 t.Fatalf("exceeded recv deadline") 233 } 234 } 235 if nTimeoutsRecv != nTimeouts { 236 t.Errorf("wrong number of timeout errors received: got %d, want %d", nTimeoutsRecv, nTimeouts) 237 } 238 if nNil != nReqs-nTimeouts { 239 t.Errorf("wrong number of successful replies: got %d, want %d", nNil, nReqs-nTimeouts) 240 } 241 } 242 243 func TestUDPv4_findnodeTimeout(t *testing.T) { 244 t.Parallel() 245 test := newUDPTest(t) 246 defer test.close() 247 248 toaddr := &net.UDPAddr{IP: net.ParseIP("1.2.3.4"), Port: 2222} 249 toid := enode.ID{1, 2, 3, 4} 250 target := encPubkey{4, 5, 6, 7} 251 result, err := test.udp.findnode(toid, toaddr, target) 252 if err != errTimeout { 253 t.Error("expected timeout error, got", err) 254 } 255 if len(result) > 0 { 256 t.Error("expected empty result, got", result) 257 } 258 } 259 260 func TestUDPv4_findnode(t *testing.T) { 261 test := newUDPTest(t) 262 defer test.close() 263 264 // put a few nodes into the table. their exact 265 // distribution shouldn't matter much, although we need to 266 // take care not to overflow any bucket. 267 nodes := &nodesByDistance{target: testTarget.id()} 268 live := make(map[enode.ID]bool) 269 numCandidates := 2 * bucketSize 270 for i := 0; i < numCandidates; i++ { 271 key := newkey() 272 ip := net.IP{10, 13, 0, byte(i)} 273 n := wrapNode(enode.NewV4(&key.PublicKey, ip, 0, 2000)) 274 // Ensure half of table content isn't verified live yet. 275 if i > numCandidates/2 { 276 n.livenessChecks = 1 277 live[n.ID()] = true 278 } 279 nodes.push(n, numCandidates) 280 } 281 fillTable(test.table, nodes.entries) 282 283 // ensure there's a bond with the test node, 284 // findnode won't be accepted otherwise. 285 remoteID := encodePubkey(&test.remotekey.PublicKey).id() 286 test.table.db.UpdateLastPongReceived(remoteID, test.remoteaddr.IP, time.Now()) 287 288 // check that closest neighbors are returned. 289 expected := test.table.closest(testTarget.id(), bucketSize, true) 290 test.packetIn(nil, &findnodeV4{Target: testTarget, Expiration: futureExp}) 291 waitNeighbors := func(want []*node) { 292 test.waitPacketOut(func(p *neighborsV4, to *net.UDPAddr, hash []byte) { 293 if len(p.Nodes) != len(want) { 294 t.Errorf("wrong number of results: got %d, want %d", len(p.Nodes), bucketSize) 295 } 296 for i, n := range p.Nodes { 297 if n.ID.id() != want[i].ID() { 298 t.Errorf("result mismatch at %d:\n got: %v\n want: %v", i, n, expected.entries[i]) 299 } 300 if !live[n.ID.id()] { 301 t.Errorf("result includes dead node %v", n.ID.id()) 302 } 303 } 304 }) 305 } 306 // Receive replies. 307 want := expected.entries 308 if len(want) > maxNeighbors { 309 waitNeighbors(want[:maxNeighbors]) 310 want = want[maxNeighbors:] 311 } 312 waitNeighbors(want) 313 } 314 315 func TestUDPv4_findnodeMultiReply(t *testing.T) { 316 test := newUDPTest(t) 317 defer test.close() 318 319 rid := enode.PubkeyToIDV4(&test.remotekey.PublicKey) 320 test.table.db.UpdateLastPingReceived(rid, test.remoteaddr.IP, time.Now()) 321 322 // queue a pending findnode request 323 resultc, errc := make(chan []*node), make(chan error) 324 go func() { 325 rid := encodePubkey(&test.remotekey.PublicKey).id() 326 ns, err := test.udp.findnode(rid, test.remoteaddr, testTarget) 327 if err != nil && len(ns) == 0 { 328 errc <- err 329 } else { 330 resultc <- ns 331 } 332 }() 333 334 // wait for the findnode to be sent. 335 // after it is sent, the transport is waiting for a reply 336 test.waitPacketOut(func(p *findnodeV4, to *net.UDPAddr, hash []byte) { 337 if p.Target != testTarget { 338 t.Errorf("wrong target: got %v, want %v", p.Target, testTarget) 339 } 340 }) 341 342 // send the reply as two packets. 343 list := []*node{ 344 wrapNode(enode.MustParse("enode://ba85011c70bcc5c04d8607d3a0ed29aa6179c092cbdda10d5d32684fb33ed01bd94f588ca8f91ac48318087dcb02eaf36773a7a453f0eedd6742af668097b29c@10.0.1.16:30303?discport=30304")), 345 wrapNode(enode.MustParse("enode://81fa361d25f157cd421c60dcc28d8dac5ef6a89476633339c5df30287474520caca09627da18543d9079b5b288698b542d56167aa5c09111e55acdbbdf2ef799@10.0.1.16:30303")), 346 wrapNode(enode.MustParse("enode://9bffefd833d53fac8e652415f4973bee289e8b1a5c6c4cbe70abf817ce8a64cee11b823b66a987f51aaa9fba0d6a91b3e6bf0d5a5d1042de8e9eeea057b217f8@10.0.1.36:30301?discport=17")), 347 wrapNode(enode.MustParse("enode://1b5b4aa662d7cb44a7221bfba67302590b643028197a7d5214790f3bac7aaa4a3241be9e83c09cf1f6c69d007c634faae3dc1b1221793e8446c0b3a09de65960@10.0.1.16:30303")), 348 } 349 rpclist := make([]rpcNode, len(list)) 350 for i := range list { 351 rpclist[i] = nodeToRPC(list[i]) 352 } 353 test.packetIn(nil, &neighborsV4{Expiration: futureExp, Nodes: rpclist[:2]}) 354 test.packetIn(nil, &neighborsV4{Expiration: futureExp, Nodes: rpclist[2:]}) 355 356 // check that the sent neighbors are all returned by findnode 357 select { 358 case result := <-resultc: 359 want := append(list[:2], list[3:]...) 360 if !reflect.DeepEqual(result, want) { 361 t.Errorf("neighbors mismatch:\n got: %v\n want: %v", result, want) 362 } 363 case err := <-errc: 364 t.Errorf("findnode error: %v", err) 365 case <-time.After(5 * time.Second): 366 t.Error("findnode did not return within 5 seconds") 367 } 368 } 369 370 // This test checks that reply matching of pong verifies the ping hash. 371 func TestUDPv4_pingMatch(t *testing.T) { 372 test := newUDPTest(t) 373 defer test.close() 374 375 randToken := make([]byte, 32) 376 crand.Read(randToken) 377 378 test.packetIn(nil, &pingV4{From: testRemote, To: testLocalAnnounced, Version: 4, Expiration: futureExp}) 379 test.waitPacketOut(func(*pongV4, *net.UDPAddr, []byte) {}) 380 test.waitPacketOut(func(*pingV4, *net.UDPAddr, []byte) {}) 381 test.packetIn(errUnsolicitedReply, &pongV4{ReplyTok: randToken, To: testLocalAnnounced, Expiration: futureExp}) 382 } 383 384 // This test checks that reply matching of pong verifies the sender IP address. 385 func TestUDPv4_pingMatchIP(t *testing.T) { 386 test := newUDPTest(t) 387 defer test.close() 388 389 test.packetIn(nil, &pingV4{From: testRemote, To: testLocalAnnounced, Version: 4, Expiration: futureExp}) 390 test.waitPacketOut(func(*pongV4, *net.UDPAddr, []byte) {}) 391 392 test.waitPacketOut(func(p *pingV4, to *net.UDPAddr, hash []byte) { 393 wrongAddr := &net.UDPAddr{IP: net.IP{33, 44, 1, 2}, Port: 30000} 394 test.packetInFrom(errUnsolicitedReply, test.remotekey, wrongAddr, &pongV4{ 395 ReplyTok: hash, 396 To: testLocalAnnounced, 397 Expiration: futureExp, 398 }) 399 }) 400 } 401 402 func TestUDPv4_successfulPing(t *testing.T) { 403 test := newUDPTest(t) 404 added := make(chan *node, 1) 405 test.table.nodeAddedHook = func(n *node) { added <- n } 406 defer test.close() 407 408 // The remote side sends a ping packet to initiate the exchange. 409 go test.packetIn(nil, &pingV4{From: testRemote, To: testLocalAnnounced, Version: 4, Expiration: futureExp}) 410 411 // The ping is replied to. 412 test.waitPacketOut(func(p *pongV4, to *net.UDPAddr, hash []byte) { 413 pinghash := test.sent[0][:macSize] 414 if !bytes.Equal(p.ReplyTok, pinghash) { 415 t.Errorf("got pong.ReplyTok %x, want %x", p.ReplyTok, pinghash) 416 } 417 wantTo := rpcEndpoint{ 418 // The mirrored UDP address is the UDP packet sender 419 IP: test.remoteaddr.IP, UDP: uint16(test.remoteaddr.Port), 420 // The mirrored TCP port is the one from the ping packet 421 TCP: testRemote.TCP, 422 } 423 if !reflect.DeepEqual(p.To, wantTo) { 424 t.Errorf("got pong.To %v, want %v", p.To, wantTo) 425 } 426 }) 427 428 // Remote is unknown, the table pings back. 429 test.waitPacketOut(func(p *pingV4, to *net.UDPAddr, hash []byte) { 430 if !reflect.DeepEqual(p.From, test.udp.ourEndpoint()) { 431 t.Errorf("got ping.From %#v, want %#v", p.From, test.udp.ourEndpoint()) 432 } 433 wantTo := rpcEndpoint{ 434 // The mirrored UDP address is the UDP packet sender. 435 IP: test.remoteaddr.IP, 436 UDP: uint16(test.remoteaddr.Port), 437 TCP: 0, 438 } 439 if !reflect.DeepEqual(p.To, wantTo) { 440 t.Errorf("got ping.To %v, want %v", p.To, wantTo) 441 } 442 test.packetIn(nil, &pongV4{ReplyTok: hash, Expiration: futureExp}) 443 }) 444 445 // The node should be added to the table shortly after getting the 446 // pong packet. 447 select { 448 case n := <-added: 449 rid := encodePubkey(&test.remotekey.PublicKey).id() 450 if n.ID() != rid { 451 t.Errorf("node has wrong ID: got %v, want %v", n.ID(), rid) 452 } 453 if !n.IP().Equal(test.remoteaddr.IP) { 454 t.Errorf("node has wrong IP: got %v, want: %v", n.IP(), test.remoteaddr.IP) 455 } 456 if n.UDP() != test.remoteaddr.Port { 457 t.Errorf("node has wrong UDP port: got %v, want: %v", n.UDP(), test.remoteaddr.Port) 458 } 459 if n.TCP() != int(testRemote.TCP) { 460 t.Errorf("node has wrong TCP port: got %v, want: %v", n.TCP(), testRemote.TCP) 461 } 462 case <-time.After(2 * time.Second): 463 t.Errorf("node was not added within 2 seconds") 464 } 465 } 466 467 // This test checks that EIP-868 requests work. 468 func TestUDPv4_EIP868(t *testing.T) { 469 test := newUDPTest(t) 470 defer test.close() 471 472 test.udp.localNode.Set(enr.WithEntry("foo", "bar")) 473 wantNode := test.udp.localNode.Node() 474 475 // ENR requests aren't allowed before endpoint proof. 476 test.packetIn(errUnknownNode, &enrRequestV4{Expiration: futureExp}) 477 478 // Perform endpoint proof and check for sequence number in packet tail. 479 test.packetIn(nil, &pingV4{Expiration: futureExp}) 480 test.waitPacketOut(func(p *pongV4, addr *net.UDPAddr, hash []byte) { 481 if seq := seqFromTail(p.Rest); seq != wantNode.Seq() { 482 t.Errorf("wrong sequence number in pong: %d, want %d", seq, wantNode.Seq()) 483 } 484 }) 485 test.waitPacketOut(func(p *pingV4, addr *net.UDPAddr, hash []byte) { 486 if seq := seqFromTail(p.Rest); seq != wantNode.Seq() { 487 t.Errorf("wrong sequence number in ping: %d, want %d", seq, wantNode.Seq()) 488 } 489 test.packetIn(nil, &pongV4{Expiration: futureExp, ReplyTok: hash}) 490 }) 491 492 // Request should work now. 493 test.packetIn(nil, &enrRequestV4{Expiration: futureExp}) 494 test.waitPacketOut(func(p *enrResponseV4, addr *net.UDPAddr, hash []byte) { 495 n, err := enode.New(enode.ValidSchemes, &p.Record) 496 if err != nil { 497 t.Fatalf("invalid record: %v", err) 498 } 499 if !reflect.DeepEqual(n, wantNode) { 500 t.Fatalf("wrong node in enrResponse: %v", n) 501 } 502 }) 503 } 504 505 // EIP-8 test vectors. 506 var testPackets = []struct { 507 input string 508 wantPacket interface{} 509 }{ 510 { 511 input: "71dbda3a79554728d4f94411e42ee1f8b0d561c10e1e5f5893367948c6a7d70bb87b235fa28a77070271b6c164a2dce8c7e13a5739b53b5e96f2e5acb0e458a02902f5965d55ecbeb2ebb6cabb8b2b232896a36b737666c55265ad0a68412f250001ea04cb847f000001820cfa8215a8d790000000000000000000000000000000018208ae820d058443b9a355", 512 wantPacket: &pingV4{ 513 Version: 4, 514 From: rpcEndpoint{net.ParseIP("127.0.0.1").To4(), 3322, 5544}, 515 To: rpcEndpoint{net.ParseIP("::1"), 2222, 3333}, 516 Expiration: 1136239445, 517 Rest: []rlp.RawValue{}, 518 }, 519 }, 520 { 521 input: "e9614ccfd9fc3e74360018522d30e1419a143407ffcce748de3e22116b7e8dc92ff74788c0b6663aaa3d67d641936511c8f8d6ad8698b820a7cf9e1be7155e9a241f556658c55428ec0563514365799a4be2be5a685a80971ddcfa80cb422cdd0101ec04cb847f000001820cfa8215a8d790000000000000000000000000000000018208ae820d058443b9a3550102", 522 wantPacket: &pingV4{ 523 Version: 4, 524 From: rpcEndpoint{net.ParseIP("127.0.0.1").To4(), 3322, 5544}, 525 To: rpcEndpoint{net.ParseIP("::1"), 2222, 3333}, 526 Expiration: 1136239445, 527 Rest: []rlp.RawValue{{0x01}, {0x02}}, 528 }, 529 }, 530 { 531 input: "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", 532 wantPacket: &pingV4{ 533 Version: 555, 534 From: rpcEndpoint{net.ParseIP("2001:db8:3c4d:15::abcd:ef12"), 3322, 5544}, 535 To: rpcEndpoint{net.ParseIP("2001:db8:85a3:8d3:1319:8a2e:370:7348"), 2222, 33338}, 536 Expiration: 1136239445, 537 Rest: []rlp.RawValue{{0xC5, 0x01, 0x02, 0x03, 0x04, 0x05}}, 538 }, 539 }, 540 { 541 input: "09b2428d83348d27cdf7064ad9024f526cebc19e4958f0fdad87c15eb598dd61d08423e0bf66b2069869e1724125f820d851c136684082774f870e614d95a2855d000f05d1648b2d5945470bc187c2d2216fbe870f43ed0909009882e176a46b0102f846d79020010db885a308d313198a2e037073488208ae82823aa0fbc914b16819237dcd8801d7e53f69e9719adecb3cc0e790c57e91ca4461c9548443b9a355c6010203c2040506a0c969a58f6f9095004c0177a6b47f451530cab38966a25cca5cb58f055542124e", 542 wantPacket: &pongV4{ 543 To: rpcEndpoint{net.ParseIP("2001:db8:85a3:8d3:1319:8a2e:370:7348"), 2222, 33338}, 544 ReplyTok: common.Hex2Bytes("fbc914b16819237dcd8801d7e53f69e9719adecb3cc0e790c57e91ca4461c954"), 545 Expiration: 1136239445, 546 Rest: []rlp.RawValue{{0xC6, 0x01, 0x02, 0x03, 0xC2, 0x04, 0x05}, {0x06}}, 547 }, 548 }, 549 { 550 input: "c7c44041b9f7c7e41934417ebac9a8e1a4c6298f74553f2fcfdcae6ed6fe53163eb3d2b52e39fe91831b8a927bf4fc222c3902202027e5e9eb812195f95d20061ef5cd31d502e47ecb61183f74a504fe04c51e73df81f25c4d506b26db4517490103f84eb840ca634cae0d49acb401d8a4c6b6fe8c55b70d115bf400769cc1400f3258cd31387574077f301b421bc84df7266c44e9e6d569fc56be00812904767bf5ccd1fc7f8443b9a35582999983999999280dc62cc8255c73471e0a61da0c89acdc0e035e260add7fc0c04ad9ebf3919644c91cb247affc82b69bd2ca235c71eab8e49737c937a2c396", 551 wantPacket: &findnodeV4{ 552 Target: hexEncPubkey("ca634cae0d49acb401d8a4c6b6fe8c55b70d115bf400769cc1400f3258cd31387574077f301b421bc84df7266c44e9e6d569fc56be00812904767bf5ccd1fc7f"), 553 Expiration: 1136239445, 554 Rest: []rlp.RawValue{{0x82, 0x99, 0x99}, {0x83, 0x99, 0x99, 0x99}}, 555 }, 556 }, 557 { 558 input: "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", 559 wantPacket: &neighborsV4{ 560 Nodes: []rpcNode{ 561 { 562 ID: hexEncPubkey("3155e1427f85f10a5c9a7755877748041af1bcd8d474ec065eb33df57a97babf54bfd2103575fa829115d224c523596b401065a97f74010610fce76382c0bf32"), 563 IP: net.ParseIP("99.33.22.55").To4(), 564 UDP: 4444, 565 TCP: 4445, 566 }, 567 { 568 ID: hexEncPubkey("312c55512422cf9b8a4097e9a6ad79402e87a15ae909a4bfefa22398f03d20951933beea1e4dfa6f968212385e829f04c2d314fc2d4e255e0d3bc08792b069db"), 569 IP: net.ParseIP("1.2.3.4").To4(), 570 UDP: 1, 571 TCP: 1, 572 }, 573 { 574 ID: hexEncPubkey("38643200b172dcfef857492156971f0e6aa2c538d8b74010f8e140811d53b98c765dd2d96126051913f44582e8c199ad7c6d6819e9a56483f637feaac9448aac"), 575 IP: net.ParseIP("2001:db8:3c4d:15::abcd:ef12"), 576 UDP: 3333, 577 TCP: 3333, 578 }, 579 { 580 ID: hexEncPubkey("8dcab8618c3253b558d459da53bd8fa68935a719aff8b811197101a4b2b47dd2d47295286fc00cc081bb542d760717d1bdd6bec2c37cd72eca367d6dd3b9df73"), 581 IP: net.ParseIP("2001:db8:85a3:8d3:1319:8a2e:370:7348"), 582 UDP: 999, 583 TCP: 1000, 584 }, 585 }, 586 Expiration: 1136239445, 587 Rest: []rlp.RawValue{{0x01}, {0x02}, {0x03}}, 588 }, 589 }, 590 } 591 592 func TestUDPv4_forwardCompatibility(t *testing.T) { 593 testkey, _ := crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291") 594 wantNodeKey := encodePubkey(&testkey.PublicKey) 595 596 for _, test := range testPackets { 597 input, err := hex.DecodeString(test.input) 598 if err != nil { 599 t.Fatalf("invalid hex: %s", test.input) 600 } 601 packet, nodekey, _, err := decodeV4(input) 602 if err != nil { 603 t.Errorf("did not accept packet %s\n%v", test.input, err) 604 continue 605 } 606 if !reflect.DeepEqual(packet, test.wantPacket) { 607 t.Errorf("got %s\nwant %s", spew.Sdump(packet), spew.Sdump(test.wantPacket)) 608 } 609 if nodekey != wantNodeKey { 610 t.Errorf("got id %v\nwant id %v", nodekey, wantNodeKey) 611 } 612 } 613 } 614 615 // dgramPipe is a fake UDP socket. It queues all sent datagrams. 616 type dgramPipe struct { 617 mu *sync.Mutex 618 cond *sync.Cond 619 closing chan struct{} 620 closed bool 621 queue []dgram 622 } 623 624 type dgram struct { 625 to net.UDPAddr 626 data []byte 627 } 628 629 func newpipe() *dgramPipe { 630 mu := new(sync.Mutex) 631 return &dgramPipe{ 632 closing: make(chan struct{}), 633 cond: &sync.Cond{L: mu}, 634 mu: mu, 635 } 636 } 637 638 // WriteToUDP queues a datagram. 639 func (c *dgramPipe) WriteToUDP(b []byte, to *net.UDPAddr) (n int, err error) { 640 msg := make([]byte, len(b)) 641 copy(msg, b) 642 c.mu.Lock() 643 defer c.mu.Unlock() 644 if c.closed { 645 return 0, errors.New("closed") 646 } 647 c.queue = append(c.queue, dgram{*to, b}) 648 c.cond.Signal() 649 return len(b), nil 650 } 651 652 // ReadFromUDP just hangs until the pipe is closed. 653 func (c *dgramPipe) ReadFromUDP(b []byte) (n int, addr *net.UDPAddr, err error) { 654 <-c.closing 655 return 0, nil, io.EOF 656 } 657 658 func (c *dgramPipe) Close() error { 659 c.mu.Lock() 660 defer c.mu.Unlock() 661 if !c.closed { 662 close(c.closing) 663 c.closed = true 664 } 665 c.cond.Broadcast() 666 return nil 667 } 668 669 func (c *dgramPipe) LocalAddr() net.Addr { 670 return &net.UDPAddr{IP: testLocal.IP, Port: int(testLocal.UDP)} 671 } 672 673 func (c *dgramPipe) receive() (dgram, error) { 674 c.mu.Lock() 675 defer c.mu.Unlock() 676 677 var timedOut bool 678 timer := time.AfterFunc(3*time.Second, func() { 679 c.mu.Lock() 680 timedOut = true 681 c.mu.Unlock() 682 c.cond.Broadcast() 683 }) 684 defer timer.Stop() 685 686 for len(c.queue) == 0 && !c.closed && !timedOut { 687 c.cond.Wait() 688 } 689 if c.closed { 690 return dgram{}, errClosed 691 } 692 if timedOut { 693 return dgram{}, errTimeout 694 } 695 p := c.queue[0] 696 copy(c.queue, c.queue[1:]) 697 c.queue = c.queue[:len(c.queue)-1] 698 return p, nil 699 }