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- // Copyright 2014 The go-ethereum Authors
- // This file is part of the go-ethereum library.
- //
- // The go-ethereum library is free software: you can redistribute it and/or modify
- // it under the terms of the GNU Lesser General Public License as published by
- // the Free Software Foundation, either version 3 of the License, or
- // (at your option) any later version.
- //
- // The go-ethereum library is distributed in the hope that it will be useful,
- // but WITHOUT ANY WARRANTY; without even the implied warranty of
- // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- // GNU Lesser General Public License for more details.
- //
- // You should have received a copy of the GNU Lesser General Public License
- // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
- package p2p
- import (
- "crypto/ecdsa"
- "errors"
- "math/rand"
- "net"
- "reflect"
- "testing"
- "time"
- "github.com/ethereum/go-ethereum/crypto"
- "github.com/ethereum/go-ethereum/crypto/sha3"
- "github.com/ethereum/go-ethereum/log"
- "github.com/ethereum/go-ethereum/p2p/discover"
- )
- func init() {
- // log.Root().SetHandler(log.LvlFilterHandler(log.LvlError, log.StreamHandler(os.Stderr, log.TerminalFormat(false))))
- }
- type testTransport struct {
- id discover.NodeID
- *rlpx
- closeErr error
- }
- func newTestTransport(id discover.NodeID, fd net.Conn) transport {
- wrapped := newRLPX(fd).(*rlpx)
- wrapped.rw = newRLPXFrameRW(fd, secrets{
- MAC: zero16,
- AES: zero16,
- IngressMAC: sha3.NewKeccak256(),
- EgressMAC: sha3.NewKeccak256(),
- })
- return &testTransport{id: id, rlpx: wrapped}
- }
- func (c *testTransport) doEncHandshake(prv *ecdsa.PrivateKey, dialDest *discover.Node) (discover.NodeID, error) {
- return c.id, nil
- }
- func (c *testTransport) doProtoHandshake(our *protoHandshake) (*protoHandshake, error) {
- return &protoHandshake{ID: c.id, Name: "test"}, nil
- }
- func (c *testTransport) close(err error) {
- c.rlpx.fd.Close()
- c.closeErr = err
- }
- func startTestServer(t *testing.T, id discover.NodeID, pf func(*Peer)) *Server {
- config := Config{
- Name: "test",
- MaxPeers: 10,
- ListenAddr: "127.0.0.1:0",
- PrivateKey: newkey(),
- }
- server := &Server{
- Config: config,
- newPeerHook: pf,
- newTransport: func(fd net.Conn) transport { return newTestTransport(id, fd) },
- }
- if err := server.Start(); err != nil {
- t.Fatalf("Could not start server: %v", err)
- }
- return server
- }
- func TestServerListen(t *testing.T) {
- // start the test server
- connected := make(chan *Peer)
- remid := randomID()
- srv := startTestServer(t, remid, func(p *Peer) {
- if p.ID() != remid {
- t.Error("peer func called with wrong node id")
- }
- if p == nil {
- t.Error("peer func called with nil conn")
- }
- connected <- p
- })
- defer close(connected)
- defer srv.Stop()
- // dial the test server
- conn, err := net.DialTimeout("tcp", srv.ListenAddr, 5*time.Second)
- if err != nil {
- t.Fatalf("could not dial: %v", err)
- }
- defer conn.Close()
- select {
- case peer := <-connected:
- if peer.LocalAddr().String() != conn.RemoteAddr().String() {
- t.Errorf("peer started with wrong conn: got %v, want %v",
- peer.LocalAddr(), conn.RemoteAddr())
- }
- peers := srv.Peers()
- if !reflect.DeepEqual(peers, []*Peer{peer}) {
- t.Errorf("Peers mismatch: got %v, want %v", peers, []*Peer{peer})
- }
- case <-time.After(1 * time.Second):
- t.Error("server did not accept within one second")
- }
- }
- func TestServerDial(t *testing.T) {
- // run a one-shot TCP server to handle the connection.
- listener, err := net.Listen("tcp", "127.0.0.1:0")
- if err != nil {
- t.Fatalf("could not setup listener: %v", err)
- }
- defer listener.Close()
- accepted := make(chan net.Conn)
- go func() {
- conn, err := listener.Accept()
- if err != nil {
- t.Error("accept error:", err)
- return
- }
- accepted <- conn
- }()
- // start the server
- connected := make(chan *Peer)
- remid := randomID()
- srv := startTestServer(t, remid, func(p *Peer) { connected <- p })
- defer close(connected)
- defer srv.Stop()
- // tell the server to connect
- tcpAddr := listener.Addr().(*net.TCPAddr)
- srv.AddPeer(&discover.Node{ID: remid, IP: tcpAddr.IP, TCP: uint16(tcpAddr.Port)})
- select {
- case conn := <-accepted:
- defer conn.Close()
- select {
- case peer := <-connected:
- if peer.ID() != remid {
- t.Errorf("peer has wrong id")
- }
- if peer.Name() != "test" {
- t.Errorf("peer has wrong name")
- }
- if peer.RemoteAddr().String() != conn.LocalAddr().String() {
- t.Errorf("peer started with wrong conn: got %v, want %v",
- peer.RemoteAddr(), conn.LocalAddr())
- }
- peers := srv.Peers()
- if !reflect.DeepEqual(peers, []*Peer{peer}) {
- t.Errorf("Peers mismatch: got %v, want %v", peers, []*Peer{peer})
- }
- case <-time.After(1 * time.Second):
- t.Error("server did not launch peer within one second")
- }
- case <-time.After(1 * time.Second):
- t.Error("server did not connect within one second")
- }
- }
- // This test checks that tasks generated by dialstate are
- // actually executed and taskdone is called for them.
- func TestServerTaskScheduling(t *testing.T) {
- var (
- done = make(chan *testTask)
- quit, returned = make(chan struct{}), make(chan struct{})
- tc = 0
- tg = taskgen{
- newFunc: func(running int, peers map[discover.NodeID]*Peer) []task {
- tc++
- return []task{&testTask{index: tc - 1}}
- },
- doneFunc: func(t task) {
- select {
- case done <- t.(*testTask):
- case <-quit:
- }
- },
- }
- )
- // The Server in this test isn't actually running
- // because we're only interested in what run does.
- srv := &Server{
- Config: Config{MaxPeers: 10},
- quit: make(chan struct{}),
- ntab: fakeTable{},
- running: true,
- log: log.New(),
- }
- srv.loopWG.Add(1)
- go func() {
- srv.run(tg)
- close(returned)
- }()
- var gotdone []*testTask
- for i := 0; i < 100; i++ {
- gotdone = append(gotdone, <-done)
- }
- for i, task := range gotdone {
- if task.index != i {
- t.Errorf("task %d has wrong index, got %d", i, task.index)
- break
- }
- if !task.called {
- t.Errorf("task %d was not called", i)
- break
- }
- }
- close(quit)
- srv.Stop()
- select {
- case <-returned:
- case <-time.After(500 * time.Millisecond):
- t.Error("Server.run did not return within 500ms")
- }
- }
- // This test checks that Server doesn't drop tasks,
- // even if newTasks returns more than the maximum number of tasks.
- func TestServerManyTasks(t *testing.T) {
- alltasks := make([]task, 300)
- for i := range alltasks {
- alltasks[i] = &testTask{index: i}
- }
- var (
- srv = &Server{
- quit: make(chan struct{}),
- ntab: fakeTable{},
- running: true,
- log: log.New(),
- }
- done = make(chan *testTask)
- start, end = 0, 0
- )
- defer srv.Stop()
- srv.loopWG.Add(1)
- go srv.run(taskgen{
- newFunc: func(running int, peers map[discover.NodeID]*Peer) []task {
- start, end = end, end+maxActiveDialTasks+10
- if end > len(alltasks) {
- end = len(alltasks)
- }
- return alltasks[start:end]
- },
- doneFunc: func(tt task) {
- done <- tt.(*testTask)
- },
- })
- doneset := make(map[int]bool)
- timeout := time.After(2 * time.Second)
- for len(doneset) < len(alltasks) {
- select {
- case tt := <-done:
- if doneset[tt.index] {
- t.Errorf("task %d got done more than once", tt.index)
- } else {
- doneset[tt.index] = true
- }
- case <-timeout:
- t.Errorf("%d of %d tasks got done within 2s", len(doneset), len(alltasks))
- for i := 0; i < len(alltasks); i++ {
- if !doneset[i] {
- t.Logf("task %d not done", i)
- }
- }
- return
- }
- }
- }
- type taskgen struct {
- newFunc func(running int, peers map[discover.NodeID]*Peer) []task
- doneFunc func(task)
- }
- func (tg taskgen) newTasks(running int, peers map[discover.NodeID]*Peer, now time.Time) []task {
- return tg.newFunc(running, peers)
- }
- func (tg taskgen) taskDone(t task, now time.Time) {
- tg.doneFunc(t)
- }
- func (tg taskgen) addStatic(*discover.Node) {
- }
- func (tg taskgen) removeStatic(*discover.Node) {
- }
- type testTask struct {
- index int
- called bool
- }
- func (t *testTask) Do(srv *Server) {
- t.called = true
- }
- // This test checks that connections are disconnected
- // just after the encryption handshake when the server is
- // at capacity. Trusted connections should still be accepted.
- func TestServerAtCap(t *testing.T) {
- trustedID := randomID()
- srv := &Server{
- Config: Config{
- PrivateKey: newkey(),
- MaxPeers: 10,
- NoDial: true,
- TrustedNodes: []*discover.Node{{ID: trustedID}},
- },
- }
- if err := srv.Start(); err != nil {
- t.Fatalf("could not start: %v", err)
- }
- defer srv.Stop()
- newconn := func(id discover.NodeID) *conn {
- fd, _ := net.Pipe()
- tx := newTestTransport(id, fd)
- return &conn{fd: fd, transport: tx, flags: inboundConn, id: id, cont: make(chan error)}
- }
- // Inject a few connections to fill up the peer set.
- for i := 0; i < 10; i++ {
- c := newconn(randomID())
- if err := srv.checkpoint(c, srv.addpeer); err != nil {
- t.Fatalf("could not add conn %d: %v", i, err)
- }
- }
- // Try inserting a non-trusted connection.
- c := newconn(randomID())
- if err := srv.checkpoint(c, srv.posthandshake); err != DiscTooManyPeers {
- t.Error("wrong error for insert:", err)
- }
- // Try inserting a trusted connection.
- c = newconn(trustedID)
- if err := srv.checkpoint(c, srv.posthandshake); err != nil {
- t.Error("unexpected error for trusted conn @posthandshake:", err)
- }
- if !c.is(trustedConn) {
- t.Error("Server did not set trusted flag")
- }
- }
- func TestServerSetupConn(t *testing.T) {
- id := randomID()
- srvkey := newkey()
- srvid := discover.PubkeyID(&srvkey.PublicKey)
- tests := []struct {
- dontstart bool
- tt *setupTransport
- flags connFlag
- dialDest *discover.Node
- wantCloseErr error
- wantCalls string
- }{
- {
- dontstart: true,
- tt: &setupTransport{id: id},
- wantCalls: "close,",
- wantCloseErr: errServerStopped,
- },
- {
- tt: &setupTransport{id: id, encHandshakeErr: errors.New("read error")},
- flags: inboundConn,
- wantCalls: "doEncHandshake,close,",
- wantCloseErr: errors.New("read error"),
- },
- {
- tt: &setupTransport{id: id},
- dialDest: &discover.Node{ID: randomID()},
- flags: dynDialedConn,
- wantCalls: "doEncHandshake,close,",
- wantCloseErr: DiscUnexpectedIdentity,
- },
- {
- tt: &setupTransport{id: id, phs: &protoHandshake{ID: randomID()}},
- dialDest: &discover.Node{ID: id},
- flags: dynDialedConn,
- wantCalls: "doEncHandshake,doProtoHandshake,close,",
- wantCloseErr: DiscUnexpectedIdentity,
- },
- {
- tt: &setupTransport{id: id, protoHandshakeErr: errors.New("foo")},
- dialDest: &discover.Node{ID: id},
- flags: dynDialedConn,
- wantCalls: "doEncHandshake,doProtoHandshake,close,",
- wantCloseErr: errors.New("foo"),
- },
- {
- tt: &setupTransport{id: srvid, phs: &protoHandshake{ID: srvid}},
- flags: inboundConn,
- wantCalls: "doEncHandshake,close,",
- wantCloseErr: DiscSelf,
- },
- {
- tt: &setupTransport{id: id, phs: &protoHandshake{ID: id}},
- flags: inboundConn,
- wantCalls: "doEncHandshake,doProtoHandshake,close,",
- wantCloseErr: DiscUselessPeer,
- },
- }
- for i, test := range tests {
- srv := &Server{
- Config: Config{
- PrivateKey: srvkey,
- MaxPeers: 10,
- NoDial: true,
- Protocols: []Protocol{discard},
- },
- newTransport: func(fd net.Conn) transport { return test.tt },
- log: log.New(),
- }
- if !test.dontstart {
- if err := srv.Start(); err != nil {
- t.Fatalf("couldn't start server: %v", err)
- }
- }
- p1, _ := net.Pipe()
- srv.SetupConn(p1, test.flags, test.dialDest)
- if !reflect.DeepEqual(test.tt.closeErr, test.wantCloseErr) {
- t.Errorf("test %d: close error mismatch: got %q, want %q", i, test.tt.closeErr, test.wantCloseErr)
- }
- if test.tt.calls != test.wantCalls {
- t.Errorf("test %d: calls mismatch: got %q, want %q", i, test.tt.calls, test.wantCalls)
- }
- }
- }
- type setupTransport struct {
- id discover.NodeID
- encHandshakeErr error
- phs *protoHandshake
- protoHandshakeErr error
- calls string
- closeErr error
- }
- func (c *setupTransport) doEncHandshake(prv *ecdsa.PrivateKey, dialDest *discover.Node) (discover.NodeID, error) {
- c.calls += "doEncHandshake,"
- return c.id, c.encHandshakeErr
- }
- func (c *setupTransport) doProtoHandshake(our *protoHandshake) (*protoHandshake, error) {
- c.calls += "doProtoHandshake,"
- if c.protoHandshakeErr != nil {
- return nil, c.protoHandshakeErr
- }
- return c.phs, nil
- }
- func (c *setupTransport) close(err error) {
- c.calls += "close,"
- c.closeErr = err
- }
- // setupConn shouldn't write to/read from the connection.
- func (c *setupTransport) WriteMsg(Msg) error {
- panic("WriteMsg called on setupTransport")
- }
- func (c *setupTransport) ReadMsg() (Msg, error) {
- panic("ReadMsg called on setupTransport")
- }
- func newkey() *ecdsa.PrivateKey {
- key, err := crypto.GenerateKey()
- if err != nil {
- panic("couldn't generate key: " + err.Error())
- }
- return key
- }
- func randomID() (id discover.NodeID) {
- for i := range id {
- id[i] = byte(rand.Intn(255))
- }
- return id
- }
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