github.com/ethereumproject/go-ethereum@v5.5.2+incompatible/p2p/metrics.go (about)

     1  // Copyright 2015 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package p2p
    18  
    19  import (
    20  	"net"
    21  
    22  	"github.com/ethereumproject/go-ethereum/metrics"
    23  )
    24  
    25  // meteredConn wraps a network TCP connection for metrics.
    26  type meteredConn struct {
    27  	net.Conn
    28  	markBytes func(int64)
    29  }
    30  
    31  func newMeteredConn(conn net.Conn, ingress bool) net.Conn {
    32  	if ingress {
    33  		metrics.P2PIn.Mark(1)
    34  		return &meteredConn{conn, metrics.P2PInBytes.Mark}
    35  	} else {
    36  		metrics.P2POut.Mark(1)
    37  		return &meteredConn{conn, metrics.P2POutBytes.Mark}
    38  	}
    39  }
    40  
    41  func (c *meteredConn) Read(b []byte) (n int, err error) {
    42  	n, err = c.Conn.Read(b)
    43  	c.markBytes(int64(n))
    44  	return
    45  }
    46  
    47  func (c *meteredConn) Write(b []byte) (n int, err error) {
    48  	n, err = c.Conn.Write(b)
    49  	c.markBytes(int64(n))
    50  	return
    51  }