package p2p import ( "fmt" "net" "time" "github.com/pkg/errors" "github.com/tendermint/tendermint/crypto" "github.com/tendermint/tendermint/crypto/ed25519" cmn "github.com/tendermint/tendermint/libs/common" "github.com/tendermint/tendermint/libs/log" "github.com/tendermint/tendermint/config" "github.com/tendermint/tendermint/p2p/conn" ) const testCh = 0x01 //------------------------------------------------ type mockNodeInfo struct { addr *NetAddress } func (ni mockNodeInfo) ID() ID { return ni.addr.ID } func (ni mockNodeInfo) NetAddress() (*NetAddress, error) { return ni.addr, nil } func (ni mockNodeInfo) Validate() error { return nil } func (ni mockNodeInfo) CompatibleWith(other NodeInfo) error { return nil } func AddPeerToSwitchPeerSet(sw *Switch, peer Peer) { sw.peers.Add(peer) } func CreateRandomPeer(outbound bool) *peer { addr, netAddr := CreateRoutableAddr() p := &peer{ peerConn: peerConn{ outbound: outbound, socketAddr: netAddr, }, nodeInfo: mockNodeInfo{netAddr}, mconn: &conn.MConnection{}, metrics: NopMetrics(), } p.SetLogger(log.TestingLogger().With("peer", addr)) return p } func CreateRoutableAddr() (addr string, netAddr *NetAddress) { for { var err error addr = fmt.Sprintf("%X@%v.%v.%v.%v:26656", cmn.RandBytes(20), cmn.RandInt()%256, cmn.RandInt()%256, cmn.RandInt()%256, cmn.RandInt()%256) netAddr, err = NewNetAddressString(addr) if err != nil { panic(err) } if netAddr.Routable() { break } } return } //------------------------------------------------------------------ // Connects switches via arbitrary net.Conn. Used for testing. const TEST_HOST = "localhost" // MakeConnectedSwitches returns n switches, connected according to the connect func. // If connect==Connect2Switches, the switches will be fully connected. // initSwitch defines how the i'th switch should be initialized (ie. with what reactors). // NOTE: panics if any switch fails to start. func MakeConnectedSwitches(cfg *config.P2PConfig, n int, initSwitch func(int, *Switch) *Switch, connect func([]*Switch, int, int), ) []*Switch { switches := make([]*Switch, n) for i := 0; i < n; i++ { switches[i] = MakeSwitch(cfg, i, TEST_HOST, "123.123.123", initSwitch) } if err := StartSwitches(switches); err != nil { panic(err) } for i := 0; i < n; i++ { for j := i + 1; j < n; j++ { connect(switches, i, j) } } return switches } // Connect2Switches will connect switches i and j via net.Pipe(). // Blocks until a connection is established. // NOTE: caller ensures i and j are within bounds. func Connect2Switches(switches []*Switch, i, j int) { switchI := switches[i] switchJ := switches[j] c1, c2 := conn.NetPipe() doneCh := make(chan struct{}) go func() { err := switchI.addPeerWithConnection(c1) if err != nil { panic(err) } doneCh <- struct{}{} }() go func() { err := switchJ.addPeerWithConnection(c2) if err != nil { panic(err) } doneCh <- struct{}{} }() <-doneCh <-doneCh } func (sw *Switch) addPeerWithConnection(conn net.Conn) error { pc, err := testInboundPeerConn(conn, sw.config, sw.nodeKey.PrivKey) if err != nil { if err := conn.Close(); err != nil { sw.Logger.Error("Error closing connection", "err", err) } return err } ni, err := handshake(conn, time.Second, sw.nodeInfo) if err != nil { if err := conn.Close(); err != nil { sw.Logger.Error("Error closing connection", "err", err) } return err } p := newPeer( pc, MConnConfig(sw.config), ni, sw.reactorsByCh, sw.chDescs, sw.StopPeerForError, ) if err = sw.addPeer(p); err != nil { pc.CloseConn() return err } return nil } // StartSwitches calls sw.Start() for each given switch. // It returns the first encountered error. func StartSwitches(switches []*Switch) error { for _, s := range switches { err := s.Start() // start switch and reactors if err != nil { return err } } return nil } func MakeSwitch( cfg *config.P2PConfig, i int, network, version string, initSwitch func(int, *Switch) *Switch, opts ...SwitchOption, ) *Switch { nodeKey := NodeKey{ PrivKey: ed25519.GenPrivKey(), } nodeInfo := testNodeInfo(nodeKey.ID(), fmt.Sprintf("node%d", i)) addr, err := NewNetAddressString( IDAddressString(nodeKey.ID(), nodeInfo.(DefaultNodeInfo).ListenAddr), ) if err != nil { panic(err) } t := NewMultiplexTransport(nodeInfo, nodeKey, MConnConfig(cfg)) if err := t.Listen(*addr); err != nil { panic(err) } // TODO: let the config be passed in? sw := initSwitch(i, NewSwitch(cfg, t, opts...)) sw.SetLogger(log.TestingLogger().With("switch", i)) sw.SetNodeKey(&nodeKey) ni := nodeInfo.(DefaultNodeInfo) for ch := range sw.reactorsByCh { ni.Channels = append(ni.Channels, ch) } nodeInfo = ni // TODO: We need to setup reactors ahead of time so the NodeInfo is properly // populated and we don't have to do those awkward overrides and setters. t.nodeInfo = nodeInfo sw.SetNodeInfo(nodeInfo) return sw } func testInboundPeerConn( conn net.Conn, config *config.P2PConfig, ourNodePrivKey crypto.PrivKey, ) (peerConn, error) { return testPeerConn(conn, config, false, false, ourNodePrivKey, nil) } func testPeerConn( rawConn net.Conn, cfg *config.P2PConfig, outbound, persistent bool, ourNodePrivKey crypto.PrivKey, socketAddr *NetAddress, ) (pc peerConn, err error) { conn := rawConn // Fuzz connection if cfg.TestFuzz { // so we have time to do peer handshakes and get set up conn = FuzzConnAfterFromConfig(conn, 10*time.Second, cfg.TestFuzzConfig) } // Encrypt connection conn, err = upgradeSecretConn(conn, cfg.HandshakeTimeout, ourNodePrivKey) if err != nil { return pc, errors.Wrap(err, "Error creating peer") } // Only the information we already have return newPeerConn(outbound, persistent, conn, socketAddr), nil } //---------------------------------------------------------------- // rand node info func testNodeInfo(id ID, name string) NodeInfo { return testNodeInfoWithNetwork(id, name, "testing") } func testNodeInfoWithNetwork(id ID, name, network string) NodeInfo { return DefaultNodeInfo{ ProtocolVersion: defaultProtocolVersion, ID_: id, ListenAddr: fmt.Sprintf("127.0.0.1:%d", getFreePort()), Network: network, Version: "1.2.3-rc0-deadbeef", Channels: []byte{testCh}, Moniker: name, Other: DefaultNodeInfoOther{ TxIndex: "on", RPCAddress: fmt.Sprintf("127.0.0.1:%d", getFreePort()), }, } } func getFreePort() int { port, err := cmn.GetFreePort() if err != nil { panic(err) } return port }