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metrics.go
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metrics.go
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// Copyright 2023 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/>.
package discover
import (
"fmt"
"net"
"github.com/hubertat/go-ethereum/metrics"
)
const (
moduleName = "discover"
// ingressMeterName is the prefix of the per-packet inbound metrics.
ingressMeterName = moduleName + "/ingress"
// egressMeterName is the prefix of the per-packet outbound metrics.
egressMeterName = moduleName + "/egress"
)
var (
bucketsCounter []metrics.Counter
ingressTrafficMeter = metrics.NewRegisteredMeter(ingressMeterName, nil)
egressTrafficMeter = metrics.NewRegisteredMeter(egressMeterName, nil)
)
func init() {
for i := 0; i < nBuckets; i++ {
bucketsCounter = append(bucketsCounter, metrics.NewRegisteredCounter(fmt.Sprintf("%s/bucket/%d/count", moduleName, i), nil))
}
}
// meteredConn is a wrapper around a net.UDPConn that meters both the
// inbound and outbound network traffic.
type meteredUdpConn struct {
UDPConn
}
func newMeteredConn(conn UDPConn) UDPConn {
// Short circuit if metrics are disabled
if !metrics.Enabled {
return conn
}
return &meteredUdpConn{UDPConn: conn}
}
// Read delegates a network read to the underlying connection, bumping the udp ingress traffic meter along the way.
func (c *meteredUdpConn) ReadFromUDP(b []byte) (n int, addr *net.UDPAddr, err error) {
n, addr, err = c.UDPConn.ReadFromUDP(b)
ingressTrafficMeter.Mark(int64(n))
return n, addr, err
}
// Write delegates a network write to the underlying connection, bumping the udp egress traffic meter along the way.
func (c *meteredUdpConn) WriteToUDP(b []byte, addr *net.UDPAddr) (n int, err error) {
n, err = c.UDPConn.WriteToUDP(b, addr)
egressTrafficMeter.Mark(int64(n))
return n, err
}