cmd/*: add Istanbul command line flags

cmd/geth/main.go

@@ -122,6 +122,8 @@ var (
 		utils.GpoPercentileFlag,
 		utils.ExtraDataFlag,
 		configFileFlag,
+		utils.IstanbulRequestTimeoutFlag,
+		utils.IstanbulBlockPeriodFlag,
 	}
 
 	rpcFlags = []cli.Flag{

cmd/geth/usage.go

@@ -225,6 +225,13 @@ var AppHelpFlagGroups = []flagGroup{
 	{
 		Name: "MISC",
 	},
+	{
+		Name: "ISTANBUL",
+		Flags: []cli.Flag{
+			utils.IstanbulRequestTimeoutFlag,
+			utils.IstanbulBlockPeriodFlag,
+		},
+	},
 }
 
 // byCategory sorts an array of flagGroup by Name in the order

cmd/utils/flags.go

@@ -532,6 +532,18 @@ var (
 		Usage: "Minimum POW accepted",
 		Value: whisper.DefaultMinimumPoW,
 	}
+
+	// Istanbul settings
+	IstanbulRequestTimeoutFlag = cli.Uint64Flag{
+		Name:  "istanbul.requesttimeout",
+		Usage: "Timeout for each Istanbul round in milliseconds",
+		Value: eth.DefaultConfig.Istanbul.RequestTimeout,
+	}
+	IstanbulBlockPeriodFlag = cli.Uint64Flag{
+		Name:  "istanbul.blockperiod",
+		Usage: "Default minimum difference between two consecutive block's timestamps in seconds",
+		Value: eth.DefaultConfig.Istanbul.BlockPeriod,
+	}
 )
 
 // MakeDataDir retrieves the currently requested data directory, terminating
@@ -961,6 +973,15 @@ func setEthash(ctx *cli.Context, cfg *eth.Config) {
 	}
 }
 
+func setIstanbul(ctx *cli.Context, cfg *eth.Config) {
+	if ctx.GlobalIsSet(IstanbulRequestTimeoutFlag.Name) {
+		cfg.Istanbul.RequestTimeout = ctx.GlobalUint64(IstanbulRequestTimeoutFlag.Name)
+	}
+	if ctx.GlobalIsSet(IstanbulBlockPeriodFlag.Name) {
+		cfg.Istanbul.BlockPeriod = ctx.GlobalUint64(IstanbulBlockPeriodFlag.Name)
+	}
+}
+
 // checkExclusive verifies that only a single isntance of the provided flags was
 // set by the user. Each flag might optionally be followed by a string type to
 // specialize it further.
@@ -1022,6 +1043,7 @@ func SetEthConfig(ctx *cli.Context, stack *node.Node, cfg *eth.Config) {
 	setGPO(ctx, &cfg.GPO)
 	setTxPool(ctx, &cfg.TxPool)
 	setEthash(ctx, cfg)
+	setIstanbul(ctx, cfg)
 
 	switch {
 	case ctx.GlobalIsSet(SyncModeFlag.Name):