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66 lines
2.2 KiB
66 lines
2.2 KiB
2 years ago
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// Copyright 2023 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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package discover
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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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moduleName = "discover"
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// ingressMeterName is the prefix of the per-packet inbound metrics.
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ingressMeterName = moduleName + "/ingress"
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// egressMeterName is the prefix of the per-packet outbound metrics.
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egressMeterName = moduleName + "/egress"
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)
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var (
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ingressTrafficMeter = metrics.NewRegisteredMeter(ingressMeterName, nil)
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egressTrafficMeter = metrics.NewRegisteredMeter(egressMeterName, nil)
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)
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// meteredConn is a wrapper around a net.UDPConn that meters both the
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// inbound and outbound network traffic.
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type meteredUdpConn struct {
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UDPConn
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}
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func newMeteredConn(conn UDPConn) UDPConn {
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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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return &meteredUdpConn{UDPConn: conn}
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}
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// Read delegates a network read to the underlying connection, bumping the udp ingress traffic meter along the way.
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func (c *meteredUdpConn) ReadFromUDP(b []byte) (n int, addr *net.UDPAddr, err error) {
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n, addr, err = c.UDPConn.ReadFromUDP(b)
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ingressTrafficMeter.Mark(int64(n))
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return n, addr, err
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}
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// Write delegates a network write to the underlying connection, bumping the udp egress traffic meter along the way.
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func (c *meteredUdpConn) WriteToUDP(b []byte, addr *net.UDPAddr) (n int, err error) {
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n, err = c.UDPConn.WriteToUDP(b, addr)
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egressTrafficMeter.Mark(int64(n))
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return n, err
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}
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