From 2f3390cf363d3f2542e87359710b694ec3d386c8 Mon Sep 17 00:00:00 2001
From: Simone Margaritelli <evilsocket@gmail.com>
Date: Mon, 25 Nov 2019 11:59:04 +0100
Subject: [PATCH] fix: using iw instead of iwconfig whenever possible (fixes
 #657)

---
 network/net.go       |  9 ++++++++-
 network/net_linux.go | 21 ++++++++++++++++-----
 2 files changed, 24 insertions(+), 6 deletions(-)

diff --git a/network/net.go b/network/net.go
index 47be68d8..35d2510a 100644
--- a/network/net.go
+++ b/network/net.go
@@ -285,7 +285,14 @@ func ActivateInterface(name string) error {
 }
 
 func SetInterfaceTxPower(name string, txpower int) error {
-	if core.HasBinary("iwconfig") {
+	if core.HasBinary("iw") {
+		Debug("SetInterfaceTxPower(%s, %d) iw based", name, txpower)
+		if _, err := core.Exec("iw", []string{"dev", name, "set", "txpower", fmt.Sprintf("%dmBm",
+			txpower)}); err != nil {
+			return err
+		}
+	} else if core.HasBinary("iwconfig") {
+		Debug("SetInterfaceTxPower(%s, %d) iwconfig based", name, txpower)
 		if out, err := core.Exec("iwconfig", []string{name, "txpower", fmt.Sprintf("%d", txpower)}); err != nil {
 			return err
 		} else if out != "" {
diff --git a/network/net_linux.go b/network/net_linux.go
index a93fb40f..b56788b0 100644
--- a/network/net_linux.go
+++ b/network/net_linux.go
@@ -41,11 +41,22 @@ func SetInterfaceChannel(iface string, channel int) error {
 		return nil
 	}
 
-	out, err := core.Exec("iwconfig", []string{iface, "channel", fmt.Sprintf("%d", channel)})
-	if err != nil {
-		return err
-	} else if out != "" {
-		return fmt.Errorf("Unexpected output while setting interface %s to channel %d: %s", iface, channel, out)
+	if core.HasBinary("iw") {
+		Debug("SetInterfaceChannel(%s, %d) iw based", iface, channel)
+		out, err := core.Exec("iw", []string{"dev", iface, "set", "channel", fmt.Sprintf("%d", channel)})
+		if err != nil {
+			return err
+		} else if out != "" {
+			return fmt.Errorf("Unexpected output while setting interface %s to channel %d: %s", iface, channel, out)
+		}
+	} else if core.HasBinary("iwconfig") {
+		Debug("SetInterfaceChannel(%s, %d) iwconfig based")
+		out, err := core.Exec("iwconfig", []string{iface, "channel", fmt.Sprintf("%d", channel)})
+		if err != nil {
+			return err
+		} else if out != "" {
+			return fmt.Errorf("Unexpected output while setting interface %s to channel %d: %s", iface, channel, out)
+		}
 	}
 
 	SetInterfaceCurrentChannel(iface, channel)