fix: fixed compilation of macOS for wifi modules

network/net_darwin.go

@@ -37,8 +37,19 @@ func getInterfaceName(iface net.Interface) string {
 }
 
 func SetInterfaceChannel(iface string, channel int) error {
+	curr := GetInterfaceChannel(iface)
+	// the interface is already on this channel
+	if curr == channel {
+		return nil
+	}
+
 	_, err := core.Exec(airPortPath, []string{iface, fmt.Sprintf("-c%d", channel)})
-	return err
+	if err != nil {
+		return err
+	}
+
+	SetInterfaceCurrentChannel(iface, channel)
+	return nil
 }
 
 func getFrequenciesFromChannels(output string) ([]int, error) {

network/net_linux.go

@@ -7,7 +7,6 @@ import (
 	"regexp"
 	"strconv"
 	"strings"
-	"sync"
 
 	"github.com/bettercap/bettercap/core"
 )
@@ -19,9 +18,6 @@ var IPv4RouteCmd = "ip"
 var IPv4RouteCmdOpts = []string{"route"}
 var WiFiFreqParser = regexp.MustCompile(`^\s+Channel.([0-9]+)\s+:\s+([0-9\.]+)\s+GHz.*$`)
 
-var currChannels = make(map[string]int)
-var currChannelLock = sync.Mutex{}
-
 func IPv4RouteIsGateway(ifname string, tokens []string, f func(gateway string) (*Endpoint, error)) (*Endpoint, error) {
 	ifname2 := tokens[3]
 
@@ -38,22 +34,10 @@ func getInterfaceName(iface net.Interface) string {
 	return iface.Name
 }
 
-func GetInterfaceChannel(iface string) int {
-	currChannelLock.Lock()
-	defer currChannelLock.Unlock()
-
-	if curr, found := currChannels[iface]; found {
-		return curr
-	}
-	return 0
-}
-
 func SetInterfaceChannel(iface string, channel int) error {
-	currChannelLock.Lock()
-	defer currChannelLock.Unlock()
-
+	curr := GetInterfaceChannel(iface)
 	// the interface is already on this channel
-	if curr, found := currChannels[iface]; found && curr == channel {
+	if curr == channel {
 		return nil
 	}
 
@@ -64,8 +48,7 @@ func SetInterfaceChannel(iface string, channel int) error {
 		return fmt.Errorf("Unexpected output while setting interface %s to channel %d: %s", iface, channel, out)
 	}
 
-	currChannels[iface] = channel
-
+	SetInterfaceCurrentChannel(iface, channel)
 	return nil
 }
 

network/net_wifi.go

@@ -0,0 +1,27 @@
+package network
+
+import (
+	"sync"
+)
+
+const NO_CHANNEL = -1
+
+var (
+	currChannels    = make(map[string]int)
+	currChannelLock = sync.Mutex{}
+)
+
+func GetInterfaceChannel(iface string) int {
+	currChannelLock.Lock()
+	defer currChannelLock.Unlock()
+	if curr, found := currChannels[iface]; found {
+		return curr
+	}
+	return NO_CHANNEL
+}
+
+func SetInterfaceCurrentChannel(iface string, channel int) {
+	currChannelLock.Lock()
+	defer currChannelLock.Unlock()
+	currChannels[iface] = channel
+}