From a3b730ce69c45f1e1cf5b1585757d9f165b0dcda Mon Sep 17 00:00:00 2001
From: evilsocket <evilsocket@gmail.com>
Date: Tue, 26 Mar 2019 20:30:33 +0100
Subject: [PATCH] fixed a bug caused by multiple wifi devices attached with
 different supported frequencies

---
 modules/wifi/wifi.go | 30 ++++++++++++++----------------
 1 file changed, 14 insertions(+), 16 deletions(-)

diff --git a/modules/wifi/wifi.go b/modules/wifi/wifi.go
index 998c2121..4ac37e34 100644
--- a/modules/wifi/wifi.go
+++ b/modules/wifi/wifi.go
@@ -441,23 +441,21 @@ func (mod *WiFiModule) Configure() error {
 	mod.hopPeriod = time.Duration(hopPeriod) * time.Millisecond
 
 	if mod.source == "" {
-		// No channels setted, retrieve frequencies supported by the card
-		if len(mod.frequencies) == 0 {
-			if freqs, err := network.GetSupportedFrequencies(ifName); err != nil {
-				return fmt.Errorf("error while getting supported frequencies of %s: %s", ifName, err)
-			} else {
-				mod.setFrequencies(freqs)
-			}
-
-			mod.Debug("wifi supported frequencies: %v", mod.frequencies)
-
-			// we need to start somewhere, this is just to check if
-			// this OS supports switching channel programmatically.
-			if err = network.SetInterfaceChannel(ifName, 1); err != nil {
-				return fmt.Errorf("error while initializing %s to channel 1: %s", ifName, err)
-			}
-			mod.Info("started (min rssi: %d dBm)", mod.minRSSI)
+		if freqs, err := network.GetSupportedFrequencies(ifName); err != nil {
+			return fmt.Errorf("error while getting supported frequencies of %s: %s", ifName, err)
+		} else {
+			mod.setFrequencies(freqs)
 		}
+
+		mod.Debug("wifi supported frequencies: %v", mod.frequencies)
+
+		// we need to start somewhere, this is just to check if
+		// this OS supports switching channel programmatically.
+		if err = network.SetInterfaceChannel(ifName, 1); err != nil {
+			return fmt.Errorf("error while initializing %s to channel 1: %s", ifName, err)
+		}
+
+		mod.Info("started (min rssi: %d dBm)", mod.minRSSI)
 	}
 
 	return nil