From e5edd3b983189790391dca5b2ae4a0e460cb7f42 Mon Sep 17 00:00:00 2001
From: Felix Lange <fjl@twurst.com>
Date: Tue, 22 Nov 2016 20:52:31 +0100
Subject: cmd/bootnode, cmd/geth, cmd/bzzd: add --netrestrict

---
 cmd/utils/flags.go | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'cmd/utils')

diff --git a/cmd/utils/flags.go b/cmd/utils/flags.go
index dd18fd78c..e97fcc025 100644
--- a/cmd/utils/flags.go
+++ b/cmd/utils/flags.go
@@ -46,6 +46,7 @@ import (
 	"github.com/ethereum/go-ethereum/p2p/discover"
 	"github.com/ethereum/go-ethereum/p2p/discv5"
 	"github.com/ethereum/go-ethereum/p2p/nat"
+	"github.com/ethereum/go-ethereum/p2p/netutil"
 	"github.com/ethereum/go-ethereum/params"
 	"github.com/ethereum/go-ethereum/pow"
 	"github.com/ethereum/go-ethereum/rpc"
@@ -367,10 +368,16 @@ var (
 		Name:  "v5disc",
 		Usage: "Enables the experimental RLPx V5 (Topic Discovery) mechanism",
 	}
+	NetrestrictFlag = cli.StringFlag{
+		Name:  "netrestrict",
+		Usage: "Restricts network communication to the given IP networks (CIDR masks)",
+	}
+
 	WhisperEnabledFlag = cli.BoolFlag{
 		Name:  "shh",
 		Usage: "Enable Whisper",
 	}
+
 	// ATM the url is left to the user and deployment to
 	JSpathFlag = cli.StringFlag{
 		Name:  "jspath",
@@ -694,6 +701,14 @@ func MakeNode(ctx *cli.Context, name, gitCommit string) *node.Node {
 		config.MaxPeers = 0
 		config.ListenAddr = ":0"
 	}
+	if netrestrict := ctx.GlobalString(NetrestrictFlag.Name); netrestrict != "" {
+		list, err := netutil.ParseNetlist(netrestrict)
+		if err != nil {
+			Fatalf("Option %q: %v", NetrestrictFlag.Name, err)
+		}
+		config.NetRestrict = list
+	}
+
 	stack, err := node.New(config)
 	if err != nil {
 		Fatalf("Failed to create the protocol stack: %v", err)
-- 
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