github.com/pslzym/go-ethereum@v1.8.17-0.20180926104442-4b6824e07b1b/p2p/discover/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 "encoding/binary" 23 "encoding/hex" 24 "errors" 25 "fmt" 26 "io" 27 "math/rand" 28 "net" 29 "path/filepath" 30 "reflect" 31 "runtime" 32 "sync" 33 "testing" 34 "time" 35 36 "github.com/davecgh/go-spew/spew" 37 "github.com/ethereum/go-ethereum/common" 38 "github.com/ethereum/go-ethereum/crypto" 39 "github.com/ethereum/go-ethereum/p2p/enode" 40 "github.com/ethereum/go-ethereum/rlp" 41 ) 42 43 func init() { 44 spew.Config.DisableMethods = true 45 } 46 47 // shared test variables 48 var ( 49 futureExp = uint64(time.Now().Add(10 * time.Hour).Unix()) 50 testTarget = encPubkey{0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1} 51 testRemote = rpcEndpoint{IP: net.ParseIP("1.1.1.1").To4(), UDP: 1, TCP: 2} 52 testLocalAnnounced = rpcEndpoint{IP: net.ParseIP("2.2.2.2").To4(), UDP: 3, TCP: 4} 53 testLocal = rpcEndpoint{IP: net.ParseIP("3.3.3.3").To4(), UDP: 5, TCP: 6} 54 ) 55 56 type udpTest struct { 57 t *testing.T 58 pipe *dgramPipe 59 table *Table 60 udp *udp 61 sent [][]byte 62 localkey, remotekey *ecdsa.PrivateKey 63 remoteaddr *net.UDPAddr 64 } 65 66 func newUDPTest(t *testing.T) *udpTest { 67 test := &udpTest{ 68 t: t, 69 pipe: newpipe(), 70 localkey: newkey(), 71 remotekey: newkey(), 72 remoteaddr: &net.UDPAddr{IP: net.IP{10, 0, 1, 99}, Port: 30303}, 73 } 74 test.table, test.udp, _ = newUDP(test.pipe, Config{PrivateKey: test.localkey}) 75 // Wait for initial refresh so the table doesn't send unexpected findnode. 76 <-test.table.initDone 77 return test 78 } 79 80 // handles a packet as if it had been sent to the transport. 81 func (test *udpTest) packetIn(wantError error, ptype byte, data packet) error { 82 enc, _, err := encodePacket(test.remotekey, ptype, data) 83 if err != nil { 84 return test.errorf("packet (%d) encode error: %v", ptype, err) 85 } 86 test.sent = append(test.sent, enc) 87 if err = test.udp.handlePacket(test.remoteaddr, enc); err != wantError { 88 return test.errorf("error mismatch: got %q, want %q", err, wantError) 89 } 90 return nil 91 } 92 93 // waits for a packet to be sent by the transport. 94 // validate should have type func(*udpTest, X) error, where X is a packet type. 95 func (test *udpTest) waitPacketOut(validate interface{}) ([]byte, error) { 96 dgram := test.pipe.waitPacketOut() 97 p, _, hash, err := decodePacket(dgram) 98 if err != nil { 99 return hash, test.errorf("sent packet decode error: %v", err) 100 } 101 fn := reflect.ValueOf(validate) 102 exptype := fn.Type().In(0) 103 if reflect.TypeOf(p) != exptype { 104 return hash, test.errorf("sent packet type mismatch, got: %v, want: %v", reflect.TypeOf(p), exptype) 105 } 106 fn.Call([]reflect.Value{reflect.ValueOf(p)}) 107 return hash, nil 108 } 109 110 func (test *udpTest) errorf(format string, args ...interface{}) error { 111 _, file, line, ok := runtime.Caller(2) // errorf + waitPacketOut 112 if ok { 113 file = filepath.Base(file) 114 } else { 115 file = "???" 116 line = 1 117 } 118 err := fmt.Errorf(format, args...) 119 fmt.Printf("\t%s:%d: %v\n", file, line, err) 120 test.t.Fail() 121 return err 122 } 123 124 func TestUDP_packetErrors(t *testing.T) { 125 test := newUDPTest(t) 126 defer test.table.Close() 127 128 test.packetIn(errExpired, pingPacket, &ping{From: testRemote, To: testLocalAnnounced, Version: 4}) 129 test.packetIn(errUnsolicitedReply, pongPacket, &pong{ReplyTok: []byte{}, Expiration: futureExp}) 130 test.packetIn(errUnknownNode, findnodePacket, &findnode{Expiration: futureExp}) 131 test.packetIn(errUnsolicitedReply, neighborsPacket, &neighbors{Expiration: futureExp}) 132 } 133 134 func TestUDP_pingTimeout(t *testing.T) { 135 t.Parallel() 136 test := newUDPTest(t) 137 defer test.table.Close() 138 139 toaddr := &net.UDPAddr{IP: net.ParseIP("1.2.3.4"), Port: 2222} 140 toid := enode.ID{1, 2, 3, 4} 141 if err := test.udp.ping(toid, toaddr); err != errTimeout { 142 t.Error("expected timeout error, got", err) 143 } 144 } 145 146 func TestUDP_responseTimeouts(t *testing.T) { 147 t.Parallel() 148 test := newUDPTest(t) 149 defer test.table.Close() 150 151 rand.Seed(time.Now().UnixNano()) 152 randomDuration := func(max time.Duration) time.Duration { 153 return time.Duration(rand.Int63n(int64(max))) 154 } 155 156 var ( 157 nReqs = 200 158 nTimeouts = 0 // number of requests with ptype > 128 159 nilErr = make(chan error, nReqs) // for requests that get a reply 160 timeoutErr = make(chan error, nReqs) // for requests that time out 161 ) 162 for i := 0; i < nReqs; i++ { 163 // Create a matcher for a random request in udp.loop. Requests 164 // with ptype <= 128 will not get a reply and should time out. 165 // For all other requests, a reply is scheduled to arrive 166 // within the timeout window. 167 p := &pending{ 168 ptype: byte(rand.Intn(255)), 169 callback: func(interface{}) bool { return true }, 170 } 171 binary.BigEndian.PutUint64(p.from[:], uint64(i)) 172 if p.ptype <= 128 { 173 p.errc = timeoutErr 174 test.udp.addpending <- p 175 nTimeouts++ 176 } else { 177 p.errc = nilErr 178 test.udp.addpending <- p 179 time.AfterFunc(randomDuration(60*time.Millisecond), func() { 180 if !test.udp.handleReply(p.from, p.ptype, nil) { 181 t.Logf("not matched: %v", p) 182 } 183 }) 184 } 185 time.Sleep(randomDuration(30 * time.Millisecond)) 186 } 187 188 // Check that all timeouts were delivered and that the rest got nil errors. 189 // The replies must be delivered. 190 var ( 191 recvDeadline = time.After(20 * time.Second) 192 nTimeoutsRecv, nNil = 0, 0 193 ) 194 for i := 0; i < nReqs; i++ { 195 select { 196 case err := <-timeoutErr: 197 if err != errTimeout { 198 t.Fatalf("got non-timeout error on timeoutErr %d: %v", i, err) 199 } 200 nTimeoutsRecv++ 201 case err := <-nilErr: 202 if err != nil { 203 t.Fatalf("got non-nil error on nilErr %d: %v", i, err) 204 } 205 nNil++ 206 case <-recvDeadline: 207 t.Fatalf("exceeded recv deadline") 208 } 209 } 210 if nTimeoutsRecv != nTimeouts { 211 t.Errorf("wrong number of timeout errors received: got %d, want %d", nTimeoutsRecv, nTimeouts) 212 } 213 if nNil != nReqs-nTimeouts { 214 t.Errorf("wrong number of successful replies: got %d, want %d", nNil, nReqs-nTimeouts) 215 } 216 } 217 218 func TestUDP_findnodeTimeout(t *testing.T) { 219 t.Parallel() 220 test := newUDPTest(t) 221 defer test.table.Close() 222 223 toaddr := &net.UDPAddr{IP: net.ParseIP("1.2.3.4"), Port: 2222} 224 toid := enode.ID{1, 2, 3, 4} 225 target := encPubkey{4, 5, 6, 7} 226 result, err := test.udp.findnode(toid, toaddr, target) 227 if err != errTimeout { 228 t.Error("expected timeout error, got", err) 229 } 230 if len(result) > 0 { 231 t.Error("expected empty result, got", result) 232 } 233 } 234 235 func TestUDP_findnode(t *testing.T) { 236 test := newUDPTest(t) 237 defer test.table.Close() 238 239 // put a few nodes into the table. their exact 240 // distribution shouldn't matter much, although we need to 241 // take care not to overflow any bucket. 242 nodes := &nodesByDistance{target: testTarget.id()} 243 for i := 0; i < bucketSize; i++ { 244 key := newkey() 245 n := wrapNode(enode.NewV4(&key.PublicKey, net.IP{10, 13, 0, 1}, 0, i)) 246 nodes.push(n, bucketSize) 247 } 248 test.table.stuff(nodes.entries) 249 250 // ensure there's a bond with the test node, 251 // findnode won't be accepted otherwise. 252 remoteID := encodePubkey(&test.remotekey.PublicKey).id() 253 test.table.db.UpdateLastPongReceived(remoteID, time.Now()) 254 255 // check that closest neighbors are returned. 256 test.packetIn(nil, findnodePacket, &findnode{Target: testTarget, Expiration: futureExp}) 257 expected := test.table.closest(testTarget.id(), bucketSize) 258 259 waitNeighbors := func(want []*node) { 260 test.waitPacketOut(func(p *neighbors) { 261 if len(p.Nodes) != len(want) { 262 t.Errorf("wrong number of results: got %d, want %d", len(p.Nodes), bucketSize) 263 } 264 for i := range p.Nodes { 265 if p.Nodes[i].ID.id() != want[i].ID() { 266 t.Errorf("result mismatch at %d:\n got: %v\n want: %v", i, p.Nodes[i], expected.entries[i]) 267 } 268 } 269 }) 270 } 271 waitNeighbors(expected.entries[:maxNeighbors]) 272 waitNeighbors(expected.entries[maxNeighbors:]) 273 } 274 275 func TestUDP_findnodeMultiReply(t *testing.T) { 276 test := newUDPTest(t) 277 defer test.table.Close() 278 279 rid := enode.PubkeyToIDV4(&test.remotekey.PublicKey) 280 test.table.db.UpdateLastPingReceived(rid, time.Now()) 281 282 // queue a pending findnode request 283 resultc, errc := make(chan []*node), make(chan error) 284 go func() { 285 rid := encodePubkey(&test.remotekey.PublicKey).id() 286 ns, err := test.udp.findnode(rid, test.remoteaddr, testTarget) 287 if err != nil && len(ns) == 0 { 288 errc <- err 289 } else { 290 resultc <- ns 291 } 292 }() 293 294 // wait for the findnode to be sent. 295 // after it is sent, the transport is waiting for a reply 296 test.waitPacketOut(func(p *findnode) { 297 if p.Target != testTarget { 298 t.Errorf("wrong target: got %v, want %v", p.Target, testTarget) 299 } 300 }) 301 302 // send the reply as two packets. 303 list := []*node{ 304 wrapNode(enode.MustParseV4("enode://ba85011c70bcc5c04d8607d3a0ed29aa6179c092cbdda10d5d32684fb33ed01bd94f588ca8f91ac48318087dcb02eaf36773a7a453f0eedd6742af668097b29c@10.0.1.16:30303?discport=30304")), 305 wrapNode(enode.MustParseV4("enode://81fa361d25f157cd421c60dcc28d8dac5ef6a89476633339c5df30287474520caca09627da18543d9079b5b288698b542d56167aa5c09111e55acdbbdf2ef799@10.0.1.16:30303")), 306 wrapNode(enode.MustParseV4("enode://9bffefd833d53fac8e652415f4973bee289e8b1a5c6c4cbe70abf817ce8a64cee11b823b66a987f51aaa9fba0d6a91b3e6bf0d5a5d1042de8e9eeea057b217f8@10.0.1.36:30301?discport=17")), 307 wrapNode(enode.MustParseV4("enode://1b5b4aa662d7cb44a7221bfba67302590b643028197a7d5214790f3bac7aaa4a3241be9e83c09cf1f6c69d007c634faae3dc1b1221793e8446c0b3a09de65960@10.0.1.16:30303")), 308 } 309 rpclist := make([]rpcNode, len(list)) 310 for i := range list { 311 rpclist[i] = nodeToRPC(list[i]) 312 } 313 test.packetIn(nil, neighborsPacket, &neighbors{Expiration: futureExp, Nodes: rpclist[:2]}) 314 test.packetIn(nil, neighborsPacket, &neighbors{Expiration: futureExp, Nodes: rpclist[2:]}) 315 316 // check that the sent neighbors are all returned by findnode 317 select { 318 case result := <-resultc: 319 want := append(list[:2], list[3:]...) 320 if !reflect.DeepEqual(result, want) { 321 t.Errorf("neighbors mismatch:\n got: %v\n want: %v", result, want) 322 } 323 case err := <-errc: 324 t.Errorf("findnode error: %v", err) 325 case <-time.After(5 * time.Second): 326 t.Error("findnode did not return within 5 seconds") 327 } 328 } 329 330 func TestUDP_successfulPing(t *testing.T) { 331 test := newUDPTest(t) 332 added := make(chan *node, 1) 333 test.table.nodeAddedHook = func(n *node) { added <- n } 334 defer test.table.Close() 335 336 // The remote side sends a ping packet to initiate the exchange. 337 go test.packetIn(nil, pingPacket, &ping{From: testRemote, To: testLocalAnnounced, Version: 4, Expiration: futureExp}) 338 339 // the ping is replied to. 340 test.waitPacketOut(func(p *pong) { 341 pinghash := test.sent[0][:macSize] 342 if !bytes.Equal(p.ReplyTok, pinghash) { 343 t.Errorf("got pong.ReplyTok %x, want %x", p.ReplyTok, pinghash) 344 } 345 wantTo := rpcEndpoint{ 346 // The mirrored UDP address is the UDP packet sender 347 IP: test.remoteaddr.IP, UDP: uint16(test.remoteaddr.Port), 348 // The mirrored TCP port is the one from the ping packet 349 TCP: testRemote.TCP, 350 } 351 if !reflect.DeepEqual(p.To, wantTo) { 352 t.Errorf("got pong.To %v, want %v", p.To, wantTo) 353 } 354 }) 355 356 // remote is unknown, the table pings back. 357 hash, _ := test.waitPacketOut(func(p *ping) error { 358 if !reflect.DeepEqual(p.From, test.udp.ourEndpoint) { 359 t.Errorf("got ping.From %v, want %v", p.From, test.udp.ourEndpoint) 360 } 361 wantTo := rpcEndpoint{ 362 // The mirrored UDP address is the UDP packet sender. 363 IP: test.remoteaddr.IP, UDP: uint16(test.remoteaddr.Port), 364 TCP: 0, 365 } 366 if !reflect.DeepEqual(p.To, wantTo) { 367 t.Errorf("got ping.To %v, want %v", p.To, wantTo) 368 } 369 return nil 370 }) 371 test.packetIn(nil, pongPacket, &pong{ReplyTok: hash, Expiration: futureExp}) 372 373 // the node should be added to the table shortly after getting the 374 // pong packet. 375 select { 376 case n := <-added: 377 rid := encodePubkey(&test.remotekey.PublicKey).id() 378 if n.ID() != rid { 379 t.Errorf("node has wrong ID: got %v, want %v", n.ID(), rid) 380 } 381 if !n.IP().Equal(test.remoteaddr.IP) { 382 t.Errorf("node has wrong IP: got %v, want: %v", n.IP(), test.remoteaddr.IP) 383 } 384 if int(n.UDP()) != test.remoteaddr.Port { 385 t.Errorf("node has wrong UDP port: got %v, want: %v", n.UDP(), test.remoteaddr.Port) 386 } 387 if n.TCP() != int(testRemote.TCP) { 388 t.Errorf("node has wrong TCP port: got %v, want: %v", n.TCP(), testRemote.TCP) 389 } 390 case <-time.After(2 * time.Second): 391 t.Errorf("node was not added within 2 seconds") 392 } 393 } 394 395 var testPackets = []struct { 396 input string 397 wantPacket interface{} 398 }{ 399 { 400 input: "71dbda3a79554728d4f94411e42ee1f8b0d561c10e1e5f5893367948c6a7d70bb87b235fa28a77070271b6c164a2dce8c7e13a5739b53b5e96f2e5acb0e458a02902f5965d55ecbeb2ebb6cabb8b2b232896a36b737666c55265ad0a68412f250001ea04cb847f000001820cfa8215a8d790000000000000000000000000000000018208ae820d058443b9a355", 401 wantPacket: &ping{ 402 Version: 4, 403 From: rpcEndpoint{net.ParseIP("127.0.0.1").To4(), 3322, 5544}, 404 To: rpcEndpoint{net.ParseIP("::1"), 2222, 3333}, 405 Expiration: 1136239445, 406 Rest: []rlp.RawValue{}, 407 }, 408 }, 409 { 410 input: "e9614ccfd9fc3e74360018522d30e1419a143407ffcce748de3e22116b7e8dc92ff74788c0b6663aaa3d67d641936511c8f8d6ad8698b820a7cf9e1be7155e9a241f556658c55428ec0563514365799a4be2be5a685a80971ddcfa80cb422cdd0101ec04cb847f000001820cfa8215a8d790000000000000000000000000000000018208ae820d058443b9a3550102", 411 wantPacket: &ping{ 412 Version: 4, 413 From: rpcEndpoint{net.ParseIP("127.0.0.1").To4(), 3322, 5544}, 414 To: rpcEndpoint{net.ParseIP("::1"), 2222, 3333}, 415 Expiration: 1136239445, 416 Rest: []rlp.RawValue{{0x01}, {0x02}}, 417 }, 418 }, 419 { 420 input: "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", 421 wantPacket: &ping{ 422 Version: 555, 423 From: rpcEndpoint{net.ParseIP("2001:db8:3c4d:15::abcd:ef12"), 3322, 5544}, 424 To: rpcEndpoint{net.ParseIP("2001:db8:85a3:8d3:1319:8a2e:370:7348"), 2222, 33338}, 425 Expiration: 1136239445, 426 Rest: []rlp.RawValue{{0xC5, 0x01, 0x02, 0x03, 0x04, 0x05}}, 427 }, 428 }, 429 { 430 input: "09b2428d83348d27cdf7064ad9024f526cebc19e4958f0fdad87c15eb598dd61d08423e0bf66b2069869e1724125f820d851c136684082774f870e614d95a2855d000f05d1648b2d5945470bc187c2d2216fbe870f43ed0909009882e176a46b0102f846d79020010db885a308d313198a2e037073488208ae82823aa0fbc914b16819237dcd8801d7e53f69e9719adecb3cc0e790c57e91ca4461c9548443b9a355c6010203c2040506a0c969a58f6f9095004c0177a6b47f451530cab38966a25cca5cb58f055542124e", 431 wantPacket: &pong{ 432 To: rpcEndpoint{net.ParseIP("2001:db8:85a3:8d3:1319:8a2e:370:7348"), 2222, 33338}, 433 ReplyTok: common.Hex2Bytes("fbc914b16819237dcd8801d7e53f69e9719adecb3cc0e790c57e91ca4461c954"), 434 Expiration: 1136239445, 435 Rest: []rlp.RawValue{{0xC6, 0x01, 0x02, 0x03, 0xC2, 0x04, 0x05}, {0x06}}, 436 }, 437 }, 438 { 439 input: "c7c44041b9f7c7e41934417ebac9a8e1a4c6298f74553f2fcfdcae6ed6fe53163eb3d2b52e39fe91831b8a927bf4fc222c3902202027e5e9eb812195f95d20061ef5cd31d502e47ecb61183f74a504fe04c51e73df81f25c4d506b26db4517490103f84eb840ca634cae0d49acb401d8a4c6b6fe8c55b70d115bf400769cc1400f3258cd31387574077f301b421bc84df7266c44e9e6d569fc56be00812904767bf5ccd1fc7f8443b9a35582999983999999280dc62cc8255c73471e0a61da0c89acdc0e035e260add7fc0c04ad9ebf3919644c91cb247affc82b69bd2ca235c71eab8e49737c937a2c396", 440 wantPacket: &findnode{ 441 Target: hexEncPubkey("ca634cae0d49acb401d8a4c6b6fe8c55b70d115bf400769cc1400f3258cd31387574077f301b421bc84df7266c44e9e6d569fc56be00812904767bf5ccd1fc7f"), 442 Expiration: 1136239445, 443 Rest: []rlp.RawValue{{0x82, 0x99, 0x99}, {0x83, 0x99, 0x99, 0x99}}, 444 }, 445 }, 446 { 447 input: "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", 448 wantPacket: &neighbors{ 449 Nodes: []rpcNode{ 450 { 451 ID: hexEncPubkey("3155e1427f85f10a5c9a7755877748041af1bcd8d474ec065eb33df57a97babf54bfd2103575fa829115d224c523596b401065a97f74010610fce76382c0bf32"), 452 IP: net.ParseIP("99.33.22.55").To4(), 453 UDP: 4444, 454 TCP: 4445, 455 }, 456 { 457 ID: hexEncPubkey("312c55512422cf9b8a4097e9a6ad79402e87a15ae909a4bfefa22398f03d20951933beea1e4dfa6f968212385e829f04c2d314fc2d4e255e0d3bc08792b069db"), 458 IP: net.ParseIP("1.2.3.4").To4(), 459 UDP: 1, 460 TCP: 1, 461 }, 462 { 463 ID: hexEncPubkey("38643200b172dcfef857492156971f0e6aa2c538d8b74010f8e140811d53b98c765dd2d96126051913f44582e8c199ad7c6d6819e9a56483f637feaac9448aac"), 464 IP: net.ParseIP("2001:db8:3c4d:15::abcd:ef12"), 465 UDP: 3333, 466 TCP: 3333, 467 }, 468 { 469 ID: hexEncPubkey("8dcab8618c3253b558d459da53bd8fa68935a719aff8b811197101a4b2b47dd2d47295286fc00cc081bb542d760717d1bdd6bec2c37cd72eca367d6dd3b9df73"), 470 IP: net.ParseIP("2001:db8:85a3:8d3:1319:8a2e:370:7348"), 471 UDP: 999, 472 TCP: 1000, 473 }, 474 }, 475 Expiration: 1136239445, 476 Rest: []rlp.RawValue{{0x01}, {0x02}, {0x03}}, 477 }, 478 }, 479 } 480 481 func TestForwardCompatibility(t *testing.T) { 482 testkey, _ := crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291") 483 wantNodeKey := encodePubkey(&testkey.PublicKey) 484 485 for _, test := range testPackets { 486 input, err := hex.DecodeString(test.input) 487 if err != nil { 488 t.Fatalf("invalid hex: %s", test.input) 489 } 490 packet, nodekey, _, err := decodePacket(input) 491 if err != nil { 492 t.Errorf("did not accept packet %s\n%v", test.input, err) 493 continue 494 } 495 if !reflect.DeepEqual(packet, test.wantPacket) { 496 t.Errorf("got %s\nwant %s", spew.Sdump(packet), spew.Sdump(test.wantPacket)) 497 } 498 if nodekey != wantNodeKey { 499 t.Errorf("got id %v\nwant id %v", nodekey, wantNodeKey) 500 } 501 } 502 } 503 504 // dgramPipe is a fake UDP socket. It queues all sent datagrams. 505 type dgramPipe struct { 506 mu *sync.Mutex 507 cond *sync.Cond 508 closing chan struct{} 509 closed bool 510 queue [][]byte 511 } 512 513 func newpipe() *dgramPipe { 514 mu := new(sync.Mutex) 515 return &dgramPipe{ 516 closing: make(chan struct{}), 517 cond: &sync.Cond{L: mu}, 518 mu: mu, 519 } 520 } 521 522 // WriteToUDP queues a datagram. 523 func (c *dgramPipe) WriteToUDP(b []byte, to *net.UDPAddr) (n int, err error) { 524 msg := make([]byte, len(b)) 525 copy(msg, b) 526 c.mu.Lock() 527 defer c.mu.Unlock() 528 if c.closed { 529 return 0, errors.New("closed") 530 } 531 c.queue = append(c.queue, msg) 532 c.cond.Signal() 533 return len(b), nil 534 } 535 536 // ReadFromUDP just hangs until the pipe is closed. 537 func (c *dgramPipe) ReadFromUDP(b []byte) (n int, addr *net.UDPAddr, err error) { 538 <-c.closing 539 return 0, nil, io.EOF 540 } 541 542 func (c *dgramPipe) Close() error { 543 c.mu.Lock() 544 defer c.mu.Unlock() 545 if !c.closed { 546 close(c.closing) 547 c.closed = true 548 } 549 return nil 550 } 551 552 func (c *dgramPipe) LocalAddr() net.Addr { 553 return &net.UDPAddr{IP: testLocal.IP, Port: int(testLocal.UDP)} 554 } 555 556 func (c *dgramPipe) waitPacketOut() []byte { 557 c.mu.Lock() 558 defer c.mu.Unlock() 559 for len(c.queue) == 0 { 560 c.cond.Wait() 561 } 562 p := c.queue[0] 563 copy(c.queue, c.queue[1:]) 564 c.queue = c.queue[:len(c.queue)-1] 565 return p 566 }