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94 lines
3.1 KiB
94 lines
3.1 KiB
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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// Contains the meters and timers used by the networking layer.
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package p2p
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import (
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"net"
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"github.com/ethereum/go-ethereum/metrics"
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)
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const (
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// ingressMeterName is the prefix of the per-packet inbound metrics.
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ingressMeterName = "p2p/ingress"
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// egressMeterName is the prefix of the per-packet outbound metrics.
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egressMeterName = "p2p/egress"
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// HandleHistName is the prefix of the per-packet serving time histograms.
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HandleHistName = "p2p/handle"
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)
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var (
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ingressConnectMeter = metrics.NewRegisteredMeter("p2p/serves", nil)
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ingressTrafficMeter = metrics.NewRegisteredMeter(ingressMeterName, nil)
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egressConnectMeter = metrics.NewRegisteredMeter("p2p/dials", nil)
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egressTrafficMeter = metrics.NewRegisteredMeter(egressMeterName, nil)
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activePeerGauge = metrics.NewRegisteredGauge("p2p/peers", nil)
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)
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// meteredConn is a wrapper around a net.Conn that meters both the
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// inbound and outbound network traffic.
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type meteredConn struct {
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net.Conn
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}
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// newMeteredConn creates a new metered connection, bumps the ingress or egress
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// connection meter and also increases the metered peer count. If the metrics
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// system is disabled, function returns the original connection.
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func newMeteredConn(conn net.Conn, ingress bool, addr *net.TCPAddr) net.Conn {
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// Short circuit if metrics are disabled
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if !metrics.Enabled {
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return conn
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}
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// Bump the connection counters and wrap the connection
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if ingress {
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ingressConnectMeter.Mark(1)
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} else {
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egressConnectMeter.Mark(1)
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}
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activePeerGauge.Inc(1)
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return &meteredConn{Conn: conn}
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}
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// Read delegates a network read to the underlying connection, bumping the common
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// and the peer ingress traffic meters along the way.
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func (c *meteredConn) Read(b []byte) (n int, err error) {
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n, err = c.Conn.Read(b)
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ingressTrafficMeter.Mark(int64(n))
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return n, err
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}
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// Write delegates a network write to the underlying connection, bumping the common
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// and the peer egress traffic meters along the way.
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func (c *meteredConn) Write(b []byte) (n int, err error) {
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n, err = c.Conn.Write(b)
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egressTrafficMeter.Mark(int64(n))
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return n, err
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}
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// Close delegates a close operation to the underlying connection, unregisters
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// the peer from the traffic registries and emits close event.
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func (c *meteredConn) Close() error {
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err := c.Conn.Close()
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if err == nil {
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activePeerGauge.Dec(1)
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}
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return err
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}
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