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250 lines
5.7 KiB
250 lines
5.7 KiB
package p2p
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import (
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"fmt"
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"net"
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"time"
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crypto "github.com/tendermint/tendermint/crypto"
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"github.com/tendermint/tendermint/crypto/ed25519"
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cmn "github.com/tendermint/tendermint/libs/common"
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"github.com/tendermint/tendermint/libs/log"
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"github.com/tendermint/tendermint/config"
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"github.com/tendermint/tendermint/p2p/conn"
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)
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func AddPeerToSwitch(sw *Switch, peer Peer) {
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sw.peers.Add(peer)
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}
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func CreateRandomPeer(outbound bool) *peer {
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addr, netAddr := CreateRoutableAddr()
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p := &peer{
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peerConn: peerConn{
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outbound: outbound,
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},
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nodeInfo: NodeInfo{
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ID: netAddr.ID,
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ListenAddr: netAddr.DialString(),
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},
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mconn: &conn.MConnection{},
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metrics: NopMetrics(),
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}
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p.SetLogger(log.TestingLogger().With("peer", addr))
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return p
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}
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func CreateRoutableAddr() (addr string, netAddr *NetAddress) {
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for {
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var err error
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addr = fmt.Sprintf("%X@%v.%v.%v.%v:26656", cmn.RandBytes(20), cmn.RandInt()%256, cmn.RandInt()%256, cmn.RandInt()%256, cmn.RandInt()%256)
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netAddr, err = NewNetAddressString(addr)
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if err != nil {
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panic(err)
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}
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if netAddr.Routable() {
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break
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}
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}
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return
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}
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//------------------------------------------------------------------
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// Connects switches via arbitrary net.Conn. Used for testing.
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const TEST_HOST = "localhost"
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// MakeConnectedSwitches returns n switches, connected according to the connect func.
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// If connect==Connect2Switches, the switches will be fully connected.
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// initSwitch defines how the i'th switch should be initialized (ie. with what reactors).
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// NOTE: panics if any switch fails to start.
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func MakeConnectedSwitches(cfg *config.P2PConfig, n int, initSwitch func(int, *Switch) *Switch, connect func([]*Switch, int, int)) []*Switch {
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switches := make([]*Switch, n)
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for i := 0; i < n; i++ {
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switches[i] = MakeSwitch(cfg, i, TEST_HOST, "123.123.123", initSwitch)
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}
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if err := StartSwitches(switches); err != nil {
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panic(err)
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}
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for i := 0; i < n; i++ {
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for j := i + 1; j < n; j++ {
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connect(switches, i, j)
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}
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}
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return switches
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}
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// Connect2Switches will connect switches i and j via net.Pipe().
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// Blocks until a connection is established.
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// NOTE: caller ensures i and j are within bounds.
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func Connect2Switches(switches []*Switch, i, j int) {
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switchI := switches[i]
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switchJ := switches[j]
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c1, c2 := conn.NetPipe()
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doneCh := make(chan struct{})
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go func() {
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err := switchI.addPeerWithConnection(c1)
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if err != nil {
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panic(err)
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}
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doneCh <- struct{}{}
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}()
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go func() {
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err := switchJ.addPeerWithConnection(c2)
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if err != nil {
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panic(err)
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}
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doneCh <- struct{}{}
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}()
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<-doneCh
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<-doneCh
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}
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func (sw *Switch) addPeerWithConnection(conn net.Conn) error {
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pc, err := testInboundPeerConn(conn, sw.config, sw.nodeKey.PrivKey)
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if err != nil {
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if err := conn.Close(); err != nil {
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sw.Logger.Error("Error closing connection", "err", err)
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}
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return err
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}
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ni, err := handshake(conn, 50*time.Millisecond, sw.nodeInfo)
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if err != nil {
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if err := conn.Close(); err != nil {
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sw.Logger.Error("Error closing connection", "err", err)
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}
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return err
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}
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p := newPeer(
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pc,
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sw.mConfig,
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ni,
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sw.reactorsByCh,
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sw.chDescs,
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sw.StopPeerForError,
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)
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if err = sw.addPeer(p); err != nil {
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pc.CloseConn()
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return err
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}
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return nil
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}
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// StartSwitches calls sw.Start() for each given switch.
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// It returns the first encountered error.
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func StartSwitches(switches []*Switch) error {
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for _, s := range switches {
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err := s.Start() // start switch and reactors
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if err != nil {
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return err
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}
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}
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return nil
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}
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func MakeSwitch(
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cfg *config.P2PConfig,
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i int,
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network, version string,
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initSwitch func(int, *Switch) *Switch,
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opts ...SwitchOption,
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) *Switch {
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var (
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nodeKey = NodeKey{
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PrivKey: ed25519.GenPrivKey(),
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}
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ni = NodeInfo{
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ID: nodeKey.ID(),
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Moniker: fmt.Sprintf("switch%d", i),
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Network: network,
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Version: version,
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ListenAddr: fmt.Sprintf("127.0.0.1:%d", cmn.RandIntn(64512)+1023),
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Other: NodeInfoOther{
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AminoVersion: "1.0",
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P2PVersion: "1.0",
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ConsensusVersion: "1.0",
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RPCVersion: "1.0",
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TxIndex: "off",
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RPCAddress: fmt.Sprintf("127.0.0.1:%d", cmn.RandIntn(64512)+1023),
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},
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}
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)
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addr, err := NewNetAddressStringWithOptionalID(
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IDAddressString(nodeKey.ID(), ni.ListenAddr),
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)
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if err != nil {
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panic(err)
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}
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t := NewMultiplexTransport(ni, nodeKey)
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if err := t.Listen(*addr); err != nil {
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panic(err)
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}
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// TODO: let the config be passed in?
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sw := initSwitch(i, NewSwitch(cfg, t, opts...))
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sw.SetLogger(log.TestingLogger())
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sw.SetNodeKey(&nodeKey)
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for ch := range sw.reactorsByCh {
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ni.Channels = append(ni.Channels, ch)
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}
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// TODO: We need to setup reactors ahead of time so the NodeInfo is properly
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// populated and we don't have to do those awkward overrides and setters.
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t.nodeInfo = ni
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sw.SetNodeInfo(ni)
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return sw
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}
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func testInboundPeerConn(
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conn net.Conn,
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config *config.P2PConfig,
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ourNodePrivKey crypto.PrivKey,
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) (peerConn, error) {
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return testPeerConn(conn, config, false, false, ourNodePrivKey, nil)
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}
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func testPeerConn(
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rawConn net.Conn,
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cfg *config.P2PConfig,
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outbound, persistent bool,
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ourNodePrivKey crypto.PrivKey,
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originalAddr *NetAddress,
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) (pc peerConn, err error) {
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conn := rawConn
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// Fuzz connection
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if cfg.TestFuzz {
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// so we have time to do peer handshakes and get set up
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conn = FuzzConnAfterFromConfig(conn, 10*time.Second, cfg.TestFuzzConfig)
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}
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// Encrypt connection
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conn, err = upgradeSecretConn(conn, cfg.HandshakeTimeout, ourNodePrivKey)
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if err != nil {
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return pc, cmn.ErrorWrap(err, "Error creating peer")
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}
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// Only the information we already have
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return peerConn{
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config: cfg,
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outbound: outbound,
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persistent: persistent,
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conn: conn,
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originalAddr: originalAddr,
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}, nil
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}
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