mirror of
https://gitlab.com/pulsechaincom/go-pulse.git
synced 2024-12-22 11:31:02 +00:00
239 lines
8.3 KiB
Go
239 lines
8.3 KiB
Go
// Copyright 2015 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/>.
|
|
|
|
// Contains the meters and timers used by the networking layer.
|
|
|
|
package p2p
|
|
|
|
import (
|
|
"fmt"
|
|
"net"
|
|
"sync"
|
|
"sync/atomic"
|
|
"time"
|
|
|
|
"github.com/ethereum/go-ethereum/event"
|
|
"github.com/ethereum/go-ethereum/log"
|
|
"github.com/ethereum/go-ethereum/metrics"
|
|
"github.com/ethereum/go-ethereum/p2p/enode"
|
|
)
|
|
|
|
const (
|
|
MetricsInboundTraffic = "p2p/ingress" // Name for the registered inbound traffic meter
|
|
MetricsOutboundTraffic = "p2p/egress" // Name for the registered outbound traffic meter
|
|
MetricsOutboundConnects = "p2p/dials" // Name for the registered outbound connects meter
|
|
MetricsInboundConnects = "p2p/serves" // Name for the registered inbound connects meter
|
|
|
|
MeteredPeerLimit = 1024 // This amount of peers are individually metered
|
|
)
|
|
|
|
var (
|
|
ingressConnectMeter = metrics.NewRegisteredMeter(MetricsInboundConnects, nil) // Meter counting the ingress connections
|
|
ingressTrafficMeter = metrics.NewRegisteredMeter(MetricsInboundTraffic, nil) // Meter metering the cumulative ingress traffic
|
|
egressConnectMeter = metrics.NewRegisteredMeter(MetricsOutboundConnects, nil) // Meter counting the egress connections
|
|
egressTrafficMeter = metrics.NewRegisteredMeter(MetricsOutboundTraffic, nil) // Meter metering the cumulative egress traffic
|
|
activePeerCounter = metrics.NewRegisteredCounter("p2p/peers", nil) // Gauge tracking the current peer count
|
|
|
|
PeerIngressRegistry = metrics.NewPrefixedChildRegistry(metrics.EphemeralRegistry, MetricsInboundTraffic+"/") // Registry containing the peer ingress
|
|
PeerEgressRegistry = metrics.NewPrefixedChildRegistry(metrics.EphemeralRegistry, MetricsOutboundTraffic+"/") // Registry containing the peer egress
|
|
|
|
meteredPeerFeed event.Feed // Event feed for peer metrics
|
|
meteredPeerCount int32 // Actually stored peer connection count
|
|
)
|
|
|
|
// MeteredPeerEventType is the type of peer events emitted by a metered connection.
|
|
type MeteredPeerEventType int
|
|
|
|
const (
|
|
// PeerConnected is the type of event emitted when a peer successfully
|
|
// made the handshake.
|
|
PeerConnected MeteredPeerEventType = iota
|
|
|
|
// PeerDisconnected is the type of event emitted when a peer disconnects.
|
|
PeerDisconnected
|
|
|
|
// PeerHandshakeFailed is the type of event emitted when a peer fails to
|
|
// make the handshake or disconnects before the handshake.
|
|
PeerHandshakeFailed
|
|
)
|
|
|
|
// MeteredPeerEvent is an event emitted when peers connect or disconnect.
|
|
type MeteredPeerEvent struct {
|
|
Type MeteredPeerEventType // Type of peer event
|
|
IP net.IP // IP address of the peer
|
|
ID enode.ID // NodeID of the peer
|
|
Elapsed time.Duration // Time elapsed between the connection and the handshake/disconnection
|
|
Ingress uint64 // Ingress count at the moment of the event
|
|
Egress uint64 // Egress count at the moment of the event
|
|
}
|
|
|
|
// SubscribeMeteredPeerEvent registers a subscription for peer life-cycle events
|
|
// if metrics collection is enabled.
|
|
func SubscribeMeteredPeerEvent(ch chan<- MeteredPeerEvent) event.Subscription {
|
|
return meteredPeerFeed.Subscribe(ch)
|
|
}
|
|
|
|
// meteredConn is a wrapper around a net.Conn that meters both the
|
|
// inbound and outbound network traffic.
|
|
type meteredConn struct {
|
|
net.Conn // Network connection to wrap with metering
|
|
|
|
connected time.Time // Connection time of the peer
|
|
ip net.IP // IP address of the peer
|
|
id enode.ID // NodeID of the peer
|
|
|
|
// trafficMetered denotes if the peer is registered in the traffic registries.
|
|
// Its value is true if the metered peer count doesn't reach the limit in the
|
|
// moment of the peer's connection.
|
|
trafficMetered bool
|
|
ingressMeter metrics.Meter // Meter for the read bytes of the peer
|
|
egressMeter metrics.Meter // Meter for the written bytes of the peer
|
|
|
|
lock sync.RWMutex // Lock protecting the metered connection's internals
|
|
}
|
|
|
|
// newMeteredConn creates a new metered connection, bumps the ingress or egress
|
|
// connection meter and also increases the metered peer count. If the metrics
|
|
// system is disabled or the IP address is unspecified, this function returns
|
|
// the original object.
|
|
func newMeteredConn(conn net.Conn, ingress bool, ip net.IP) net.Conn {
|
|
// Short circuit if metrics are disabled
|
|
if !metrics.Enabled {
|
|
return conn
|
|
}
|
|
if ip.IsUnspecified() {
|
|
log.Warn("Peer IP is unspecified")
|
|
return conn
|
|
}
|
|
// Bump the connection counters and wrap the connection
|
|
if ingress {
|
|
ingressConnectMeter.Mark(1)
|
|
} else {
|
|
egressConnectMeter.Mark(1)
|
|
}
|
|
activePeerCounter.Inc(1)
|
|
|
|
return &meteredConn{
|
|
Conn: conn,
|
|
ip: ip,
|
|
connected: time.Now(),
|
|
}
|
|
}
|
|
|
|
// Read delegates a network read to the underlying connection, bumping the common
|
|
// and the peer ingress traffic meters along the way.
|
|
func (c *meteredConn) Read(b []byte) (n int, err error) {
|
|
n, err = c.Conn.Read(b)
|
|
ingressTrafficMeter.Mark(int64(n))
|
|
c.lock.RLock()
|
|
if c.trafficMetered {
|
|
c.ingressMeter.Mark(int64(n))
|
|
}
|
|
c.lock.RUnlock()
|
|
return n, err
|
|
}
|
|
|
|
// Write delegates a network write to the underlying connection, bumping the common
|
|
// and the peer egress traffic meters along the way.
|
|
func (c *meteredConn) Write(b []byte) (n int, err error) {
|
|
n, err = c.Conn.Write(b)
|
|
egressTrafficMeter.Mark(int64(n))
|
|
c.lock.RLock()
|
|
if c.trafficMetered {
|
|
c.egressMeter.Mark(int64(n))
|
|
}
|
|
c.lock.RUnlock()
|
|
return n, err
|
|
}
|
|
|
|
// handshakeDone is called when a peer handshake is done. Registers the peer to
|
|
// the ingress and the egress traffic registries using the peer's IP and node ID,
|
|
// also emits connect event.
|
|
func (c *meteredConn) handshakeDone(id enode.ID) {
|
|
// TODO (kurkomisi): use the node URL instead of the pure node ID. (the String() method of *Node)
|
|
if atomic.AddInt32(&meteredPeerCount, 1) >= MeteredPeerLimit {
|
|
// Don't register the peer in the traffic registries.
|
|
atomic.AddInt32(&meteredPeerCount, -1)
|
|
c.lock.Lock()
|
|
c.id, c.trafficMetered = id, false
|
|
c.lock.Unlock()
|
|
log.Warn("Metered peer count reached the limit")
|
|
} else {
|
|
key := fmt.Sprintf("%s/%s", c.ip, id.String())
|
|
c.lock.Lock()
|
|
c.id, c.trafficMetered = id, true
|
|
c.ingressMeter = metrics.NewRegisteredMeter(key, PeerIngressRegistry)
|
|
c.egressMeter = metrics.NewRegisteredMeter(key, PeerEgressRegistry)
|
|
c.lock.Unlock()
|
|
}
|
|
meteredPeerFeed.Send(MeteredPeerEvent{
|
|
Type: PeerConnected,
|
|
IP: c.ip,
|
|
ID: id,
|
|
Elapsed: time.Since(c.connected),
|
|
})
|
|
}
|
|
|
|
// Close delegates a close operation to the underlying connection, unregisters
|
|
// the peer from the traffic registries and emits close event.
|
|
func (c *meteredConn) Close() error {
|
|
err := c.Conn.Close()
|
|
c.lock.RLock()
|
|
if c.id == (enode.ID{}) {
|
|
// If the peer disconnects before the handshake.
|
|
c.lock.RUnlock()
|
|
meteredPeerFeed.Send(MeteredPeerEvent{
|
|
Type: PeerHandshakeFailed,
|
|
IP: c.ip,
|
|
Elapsed: time.Since(c.connected),
|
|
})
|
|
activePeerCounter.Dec(1)
|
|
return err
|
|
}
|
|
id := c.id
|
|
if !c.trafficMetered {
|
|
// If the peer isn't registered in the traffic registries.
|
|
c.lock.RUnlock()
|
|
meteredPeerFeed.Send(MeteredPeerEvent{
|
|
Type: PeerDisconnected,
|
|
IP: c.ip,
|
|
ID: id,
|
|
})
|
|
activePeerCounter.Dec(1)
|
|
return err
|
|
}
|
|
ingress, egress := uint64(c.ingressMeter.Count()), uint64(c.egressMeter.Count())
|
|
c.lock.RUnlock()
|
|
|
|
// Decrement the metered peer count
|
|
atomic.AddInt32(&meteredPeerCount, -1)
|
|
|
|
// Unregister the peer from the traffic registries
|
|
key := fmt.Sprintf("%s/%s", c.ip, id)
|
|
PeerIngressRegistry.Unregister(key)
|
|
PeerEgressRegistry.Unregister(key)
|
|
|
|
meteredPeerFeed.Send(MeteredPeerEvent{
|
|
Type: PeerDisconnected,
|
|
IP: c.ip,
|
|
ID: id,
|
|
Ingress: ingress,
|
|
Egress: egress,
|
|
})
|
|
activePeerCounter.Dec(1)
|
|
return err
|
|
}
|