You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
371 lines
9.8 KiB
371 lines
9.8 KiB
package p2p
|
|
|
|
import (
|
|
"fmt"
|
|
"net"
|
|
"time"
|
|
|
|
"github.com/pkg/errors"
|
|
|
|
crypto "github.com/tendermint/go-crypto"
|
|
wire "github.com/tendermint/go-wire"
|
|
cmn "github.com/tendermint/tmlibs/common"
|
|
"github.com/tendermint/tmlibs/log"
|
|
|
|
tmconn "github.com/tendermint/tendermint/p2p/conn"
|
|
)
|
|
|
|
// Peer is an interface representing a peer connected on a reactor.
|
|
type Peer interface {
|
|
cmn.Service
|
|
|
|
ID() ID // peer's cryptographic ID
|
|
IsOutbound() bool // did we dial the peer
|
|
IsPersistent() bool // do we redial this peer when we disconnect
|
|
NodeInfo() NodeInfo // peer's info
|
|
Status() tmconn.ConnectionStatus
|
|
|
|
Send(byte, interface{}) bool
|
|
TrySend(byte, interface{}) bool
|
|
|
|
Set(string, interface{})
|
|
Get(string) interface{}
|
|
}
|
|
|
|
//----------------------------------------------------------
|
|
|
|
// peerConn contains the raw connection and its config.
|
|
type peerConn struct {
|
|
outbound bool
|
|
persistent bool
|
|
config *PeerConfig
|
|
conn net.Conn // source connection
|
|
}
|
|
|
|
// ID only exists for SecretConnection.
|
|
// NOTE: Will panic if conn is not *SecretConnection.
|
|
func (pc peerConn) ID() ID {
|
|
return PubKeyToID(pc.conn.(*tmconn.SecretConnection).RemotePubKey())
|
|
}
|
|
|
|
// peer implements Peer.
|
|
//
|
|
// Before using a peer, you will need to perform a handshake on connection.
|
|
type peer struct {
|
|
cmn.BaseService
|
|
|
|
// raw peerConn and the multiplex connection
|
|
peerConn
|
|
mconn *tmconn.MConnection
|
|
|
|
// peer's node info and the channel it knows about
|
|
// channels = nodeInfo.Channels
|
|
// cached to avoid copying nodeInfo in hasChannel
|
|
nodeInfo NodeInfo
|
|
channels []byte
|
|
|
|
// User data
|
|
Data *cmn.CMap
|
|
}
|
|
|
|
func newPeer(pc peerConn, nodeInfo NodeInfo,
|
|
reactorsByCh map[byte]Reactor, chDescs []*tmconn.ChannelDescriptor,
|
|
onPeerError func(Peer, interface{})) *peer {
|
|
|
|
p := &peer{
|
|
peerConn: pc,
|
|
nodeInfo: nodeInfo,
|
|
channels: nodeInfo.Channels,
|
|
Data: cmn.NewCMap(),
|
|
}
|
|
p.mconn = createMConnection(pc.conn, p, reactorsByCh, chDescs, onPeerError, pc.config.MConfig)
|
|
p.BaseService = *cmn.NewBaseService(nil, "Peer", p)
|
|
return p
|
|
}
|
|
|
|
// PeerConfig is a Peer configuration.
|
|
type PeerConfig struct {
|
|
AuthEnc bool `mapstructure:"auth_enc"` // authenticated encryption
|
|
|
|
// times are in seconds
|
|
HandshakeTimeout time.Duration `mapstructure:"handshake_timeout"`
|
|
DialTimeout time.Duration `mapstructure:"dial_timeout"`
|
|
|
|
MConfig *tmconn.MConnConfig `mapstructure:"connection"`
|
|
|
|
Fuzz bool `mapstructure:"fuzz"` // fuzz connection (for testing)
|
|
FuzzConfig *FuzzConnConfig `mapstructure:"fuzz_config"`
|
|
}
|
|
|
|
// DefaultPeerConfig returns the default config.
|
|
func DefaultPeerConfig() *PeerConfig {
|
|
return &PeerConfig{
|
|
AuthEnc: true,
|
|
HandshakeTimeout: 20, // * time.Second,
|
|
DialTimeout: 3, // * time.Second,
|
|
MConfig: tmconn.DefaultMConnConfig(),
|
|
Fuzz: false,
|
|
FuzzConfig: DefaultFuzzConnConfig(),
|
|
}
|
|
}
|
|
|
|
func newOutboundPeerConn(addr *NetAddress, config *PeerConfig, persistent bool, ourNodePrivKey crypto.PrivKey) (peerConn, error) {
|
|
var pc peerConn
|
|
|
|
conn, err := dial(addr, config)
|
|
if err != nil {
|
|
return pc, errors.Wrap(err, "Error creating peer")
|
|
}
|
|
|
|
pc, err = newPeerConn(conn, config, true, persistent, ourNodePrivKey)
|
|
if err != nil {
|
|
if err2 := conn.Close(); err2 != nil {
|
|
return pc, errors.Wrap(err, err2.Error())
|
|
}
|
|
return pc, err
|
|
}
|
|
|
|
// ensure dialed ID matches connection ID
|
|
if config.AuthEnc && addr.ID != pc.ID() {
|
|
if err2 := conn.Close(); err2 != nil {
|
|
return pc, errors.Wrap(err, err2.Error())
|
|
}
|
|
return pc, ErrSwitchAuthenticationFailure{addr, pc.ID()}
|
|
}
|
|
return pc, nil
|
|
}
|
|
|
|
func newInboundPeerConn(conn net.Conn, config *PeerConfig, ourNodePrivKey crypto.PrivKey) (peerConn, error) {
|
|
|
|
// TODO: issue PoW challenge
|
|
|
|
return newPeerConn(conn, config, false, false, ourNodePrivKey)
|
|
}
|
|
|
|
func newPeerConn(rawConn net.Conn,
|
|
config *PeerConfig, outbound, persistent bool,
|
|
ourNodePrivKey crypto.PrivKey) (pc peerConn, err error) {
|
|
|
|
conn := rawConn
|
|
|
|
// Fuzz connection
|
|
if config.Fuzz {
|
|
// so we have time to do peer handshakes and get set up
|
|
conn = FuzzConnAfterFromConfig(conn, 10*time.Second, config.FuzzConfig)
|
|
}
|
|
|
|
if config.AuthEnc {
|
|
// Set deadline for secret handshake
|
|
if err := conn.SetDeadline(time.Now().Add(config.HandshakeTimeout * time.Second)); err != nil {
|
|
return pc, errors.Wrap(err, "Error setting deadline while encrypting connection")
|
|
}
|
|
|
|
// Encrypt connection
|
|
conn, err = tmconn.MakeSecretConnection(conn, ourNodePrivKey)
|
|
if err != nil {
|
|
return pc, errors.Wrap(err, "Error creating peer")
|
|
}
|
|
}
|
|
|
|
// Only the information we already have
|
|
return peerConn{
|
|
config: config,
|
|
outbound: outbound,
|
|
persistent: persistent,
|
|
conn: conn,
|
|
}, nil
|
|
}
|
|
|
|
//---------------------------------------------------
|
|
// Implements cmn.Service
|
|
|
|
// SetLogger implements BaseService.
|
|
func (p *peer) SetLogger(l log.Logger) {
|
|
p.Logger = l
|
|
p.mconn.SetLogger(l)
|
|
}
|
|
|
|
// OnStart implements BaseService.
|
|
func (p *peer) OnStart() error {
|
|
if err := p.BaseService.OnStart(); err != nil {
|
|
return err
|
|
}
|
|
err := p.mconn.Start()
|
|
return err
|
|
}
|
|
|
|
// OnStop implements BaseService.
|
|
func (p *peer) OnStop() {
|
|
p.BaseService.OnStop()
|
|
p.mconn.Stop() // stop everything and close the conn
|
|
}
|
|
|
|
//---------------------------------------------------
|
|
// Implements Peer
|
|
|
|
// ID returns the peer's ID - the hex encoded hash of its pubkey.
|
|
func (p *peer) ID() ID {
|
|
return p.nodeInfo.ID()
|
|
}
|
|
|
|
// IsOutbound returns true if the connection is outbound, false otherwise.
|
|
func (p *peer) IsOutbound() bool {
|
|
return p.peerConn.outbound
|
|
}
|
|
|
|
// IsPersistent returns true if the peer is persitent, false otherwise.
|
|
func (p *peer) IsPersistent() bool {
|
|
return p.peerConn.persistent
|
|
}
|
|
|
|
// NodeInfo returns a copy of the peer's NodeInfo.
|
|
func (p *peer) NodeInfo() NodeInfo {
|
|
return p.nodeInfo
|
|
}
|
|
|
|
// Status returns the peer's ConnectionStatus.
|
|
func (p *peer) Status() tmconn.ConnectionStatus {
|
|
return p.mconn.Status()
|
|
}
|
|
|
|
// Send msg to the channel identified by chID byte. Returns false if the send
|
|
// queue is full after timeout, specified by MConnection.
|
|
func (p *peer) Send(chID byte, msg interface{}) bool {
|
|
if !p.IsRunning() {
|
|
// see Switch#Broadcast, where we fetch the list of peers and loop over
|
|
// them - while we're looping, one peer may be removed and stopped.
|
|
return false
|
|
} else if !p.hasChannel(chID) {
|
|
return false
|
|
}
|
|
return p.mconn.Send(chID, msg)
|
|
}
|
|
|
|
// TrySend msg to the channel identified by chID byte. Immediately returns
|
|
// false if the send queue is full.
|
|
func (p *peer) TrySend(chID byte, msg interface{}) bool {
|
|
if !p.IsRunning() {
|
|
return false
|
|
} else if !p.hasChannel(chID) {
|
|
return false
|
|
}
|
|
return p.mconn.TrySend(chID, msg)
|
|
}
|
|
|
|
// Get the data for a given key.
|
|
func (p *peer) Get(key string) interface{} {
|
|
return p.Data.Get(key)
|
|
}
|
|
|
|
// Set sets the data for the given key.
|
|
func (p *peer) Set(key string, data interface{}) {
|
|
p.Data.Set(key, data)
|
|
}
|
|
|
|
// hasChannel returns true if the peer reported
|
|
// knowing about the given chID.
|
|
func (p *peer) hasChannel(chID byte) bool {
|
|
for _, ch := range p.channels {
|
|
if ch == chID {
|
|
return true
|
|
}
|
|
}
|
|
// NOTE: probably will want to remove this
|
|
// but could be helpful while the feature is new
|
|
p.Logger.Debug("Unknown channel for peer", "channel", chID, "channels", p.channels)
|
|
return false
|
|
}
|
|
|
|
//---------------------------------------------------
|
|
// methods used by the Switch
|
|
|
|
// CloseConn should be called by the Switch if the peer was created but never started.
|
|
func (pc *peerConn) CloseConn() {
|
|
pc.conn.Close() // nolint: errcheck
|
|
}
|
|
|
|
// HandshakeTimeout performs the Tendermint P2P handshake between a given node and the peer
|
|
// by exchanging their NodeInfo. It sets the received nodeInfo on the peer.
|
|
// NOTE: blocking
|
|
func (pc *peerConn) HandshakeTimeout(ourNodeInfo NodeInfo, timeout time.Duration) (peerNodeInfo NodeInfo, err error) {
|
|
// Set deadline for handshake so we don't block forever on conn.ReadFull
|
|
if err := pc.conn.SetDeadline(time.Now().Add(timeout)); err != nil {
|
|
return peerNodeInfo, errors.Wrap(err, "Error setting deadline")
|
|
}
|
|
|
|
var err1 error
|
|
var err2 error
|
|
cmn.Parallel(
|
|
func() {
|
|
var n int
|
|
wire.WriteBinary(&ourNodeInfo, pc.conn, &n, &err1)
|
|
},
|
|
func() {
|
|
var n int
|
|
wire.ReadBinary(&peerNodeInfo, pc.conn, MaxNodeInfoSize(), &n, &err2)
|
|
})
|
|
if err1 != nil {
|
|
return peerNodeInfo, errors.Wrap(err1, "Error during handshake/write")
|
|
}
|
|
if err2 != nil {
|
|
return peerNodeInfo, errors.Wrap(err2, "Error during handshake/read")
|
|
}
|
|
|
|
// Remove deadline
|
|
if err := pc.conn.SetDeadline(time.Time{}); err != nil {
|
|
return peerNodeInfo, errors.Wrap(err, "Error removing deadline")
|
|
}
|
|
|
|
return peerNodeInfo, nil
|
|
}
|
|
|
|
// Addr returns peer's remote network address.
|
|
func (p *peer) Addr() net.Addr {
|
|
return p.peerConn.conn.RemoteAddr()
|
|
}
|
|
|
|
// CanSend returns true if the send queue is not full, false otherwise.
|
|
func (p *peer) CanSend(chID byte) bool {
|
|
if !p.IsRunning() {
|
|
return false
|
|
}
|
|
return p.mconn.CanSend(chID)
|
|
}
|
|
|
|
// String representation.
|
|
func (p *peer) String() string {
|
|
if p.outbound {
|
|
return fmt.Sprintf("Peer{%v %v out}", p.mconn, p.ID())
|
|
}
|
|
|
|
return fmt.Sprintf("Peer{%v %v in}", p.mconn, p.ID())
|
|
}
|
|
|
|
//------------------------------------------------------------------
|
|
// helper funcs
|
|
|
|
func dial(addr *NetAddress, config *PeerConfig) (net.Conn, error) {
|
|
conn, err := addr.DialTimeout(config.DialTimeout * time.Second)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return conn, nil
|
|
}
|
|
|
|
func createMConnection(conn net.Conn, p *peer, reactorsByCh map[byte]Reactor, chDescs []*tmconn.ChannelDescriptor,
|
|
onPeerError func(Peer, interface{}), config *tmconn.MConnConfig) *tmconn.MConnection {
|
|
|
|
onReceive := func(chID byte, msgBytes []byte) {
|
|
reactor := reactorsByCh[chID]
|
|
if reactor == nil {
|
|
cmn.PanicSanity(cmn.Fmt("Unknown channel %X", chID))
|
|
}
|
|
reactor.Receive(chID, p, msgBytes)
|
|
}
|
|
|
|
onError := func(r interface{}) {
|
|
onPeerError(p, r)
|
|
}
|
|
|
|
return tmconn.NewMConnectionWithConfig(conn, chDescs, onReceive, onError, config)
|
|
}
|