package p2p import ( "fmt" "net" crypto "github.com/tendermint/tendermint/crypto" cmn "github.com/tendermint/tendermint/libs/common" "github.com/tendermint/tendermint/libs/log" "github.com/tendermint/tendermint/config" "github.com/tendermint/tendermint/p2p/conn" ) func AddPeerToSwitch(sw *Switch, peer Peer) { sw.peers.Add(peer) } func CreateRandomPeer(outbound bool) *peer { addr, netAddr := CreateRoutableAddr() p := &peer{ peerConn: peerConn{ outbound: outbound, }, nodeInfo: NodeInfo{ ID: netAddr.ID, ListenAddr: netAddr.DialString(), }, mconn: &conn.MConnection{}, } p.SetLogger(log.TestingLogger().With("peer", addr)) return p } func CreateRoutableAddr() (addr string, netAddr *NetAddress) { for { var err error addr = cmn.Fmt("%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 := newInboundPeerConn(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 } if err = sw.addPeer(pc); 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) *Switch { // new switch, add reactors // TODO: let the config be passed in? nodeKey := &NodeKey{ PrivKey: crypto.GenPrivKeyEd25519(), } sw := NewSwitch(cfg) sw.SetLogger(log.TestingLogger()) sw = initSwitch(i, sw) ni := NodeInfo{ ID: nodeKey.ID(), Moniker: cmn.Fmt("switch%d", i), Network: network, Version: version, ListenAddr: fmt.Sprintf("127.0.0.1:%d", cmn.RandIntn(64512)+1023), } for ch := range sw.reactorsByCh { ni.Channels = append(ni.Channels, ch) } sw.SetNodeInfo(ni) sw.SetNodeKey(nodeKey) return sw }