From c51e153b5c5327f971e7b410e49e7babfc3f0b8e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C3=A9ter=20Szil=C3=A1gyi?= <peterke@gmail.com>
Date: Thu, 2 Jul 2015 14:13:46 +0300
Subject: eth, metrics, p2p: prepare metrics and net packets to eth/62

---
 eth/metrics.go | 84 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)

(limited to 'eth/metrics.go')

diff --git a/eth/metrics.go b/eth/metrics.go
index 625b90b67..13745dc43 100644
--- a/eth/metrics.go
+++ b/eth/metrics.go
@@ -18,6 +18,7 @@ package eth
 
 import (
 	"github.com/ethereum/go-ethereum/metrics"
+	"github.com/ethereum/go-ethereum/p2p"
 )
 
 var (
@@ -41,4 +42,87 @@ var (
 	reqBlockInTrafficMeter   = metrics.NewMeter("eth/req/blocks/in/traffic")
 	reqBlockOutPacketsMeter  = metrics.NewMeter("eth/req/blocks/out/packets")
 	reqBlockOutTrafficMeter  = metrics.NewMeter("eth/req/blocks/out/traffic")
+	reqHeaderInPacketsMeter  = metrics.NewMeter("eth/req/header/in/packets")
+	reqHeaderInTrafficMeter  = metrics.NewMeter("eth/req/header/in/traffic")
+	reqHeaderOutPacketsMeter = metrics.NewMeter("eth/req/header/out/packets")
+	reqHeaderOutTrafficMeter = metrics.NewMeter("eth/req/header/out/traffic")
+	reqStateInPacketsMeter   = metrics.NewMeter("eth/req/state/in/packets")
+	reqStateInTrafficMeter   = metrics.NewMeter("eth/req/state/in/traffic")
+	reqStateOutPacketsMeter  = metrics.NewMeter("eth/req/state/out/packets")
+	reqStateOutTrafficMeter  = metrics.NewMeter("eth/req/state/out/traffic")
+	miscInPacketsMeter       = metrics.NewMeter("eth/misc/in/packets")
+	miscInTrafficMeter       = metrics.NewMeter("eth/misc/in/traffic")
+	miscOutPacketsMeter      = metrics.NewMeter("eth/misc/out/packets")
+	miscOutTrafficMeter      = metrics.NewMeter("eth/misc/out/traffic")
 )
+
+// meteredMsgReadWriter is a wrapper around a p2p.MsgReadWriter, capable of
+// accumulating the above defined metrics based on the data stream contents.
+type meteredMsgReadWriter struct {
+	p2p.MsgReadWriter
+}
+
+// newMeteredMsgWriter wraps a p2p MsgReadWriter with metering support. If the
+// metrics system is disabled, this fucntion returns the original object.
+func newMeteredMsgWriter(rw p2p.MsgReadWriter) p2p.MsgReadWriter {
+	if !metrics.Enabled {
+		return rw
+	}
+	return &meteredMsgReadWriter{rw}
+}
+
+func (rw *meteredMsgReadWriter) ReadMsg() (p2p.Msg, error) {
+	// Read the message and short circuit in case of an error
+	msg, err := rw.MsgReadWriter.ReadMsg()
+	if err != nil {
+		return msg, err
+	}
+	// Account for the data traffic
+	packets, traffic := miscInPacketsMeter, miscInTrafficMeter
+	switch msg.Code {
+	case BlockHashesMsg:
+		packets, traffic = reqHashInPacketsMeter, reqHashInTrafficMeter
+	case BlocksMsg:
+		packets, traffic = reqBlockInPacketsMeter, reqBlockInTrafficMeter
+	case BlockHeadersMsg:
+		packets, traffic = reqHeaderInPacketsMeter, reqHeaderInTrafficMeter
+	case NodeDataMsg:
+		packets, traffic = reqStateInPacketsMeter, reqStateInTrafficMeter
+	case NewBlockHashesMsg:
+		packets, traffic = propHashInPacketsMeter, propHashInTrafficMeter
+	case NewBlockMsg:
+		packets, traffic = propBlockInPacketsMeter, propBlockInTrafficMeter
+	case TxMsg:
+		packets, traffic = propTxnInPacketsMeter, propTxnInTrafficMeter
+	}
+	packets.Mark(1)
+	traffic.Mark(int64(msg.Size))
+
+	return msg, err
+}
+
+func (rw *meteredMsgReadWriter) WriteMsg(msg p2p.Msg) error {
+	// Account for the data traffic
+	packets, traffic := miscOutPacketsMeter, miscOutTrafficMeter
+	switch msg.Code {
+	case BlockHashesMsg:
+		packets, traffic = reqHashOutPacketsMeter, reqHashOutTrafficMeter
+	case BlocksMsg:
+		packets, traffic = reqBlockOutPacketsMeter, reqBlockOutTrafficMeter
+	case BlockHeadersMsg:
+		packets, traffic = reqHeaderOutPacketsMeter, reqHeaderOutTrafficMeter
+	case NodeDataMsg:
+		packets, traffic = reqStateOutPacketsMeter, reqStateOutTrafficMeter
+	case NewBlockHashesMsg:
+		packets, traffic = propHashOutPacketsMeter, propHashOutTrafficMeter
+	case NewBlockMsg:
+		packets, traffic = propBlockOutPacketsMeter, propBlockOutTrafficMeter
+	case TxMsg:
+		packets, traffic = propTxnOutPacketsMeter, propTxnOutTrafficMeter
+	}
+	packets.Mark(1)
+	traffic.Mark(int64(msg.Size))
+
+	// Send the packet to the p2p layer
+	return rw.MsgReadWriter.WriteMsg(msg)
+}
-- 
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