Access NSLog through Cgo for iOS NetworkExtension logging

src/yggdrasil/awdl.go

@@ -109,11 +109,12 @@ func (ai *awdlInterface) handler() {
 		timer.Reset(timerInterval)
 		select {
 		case _ = <-timer.C:
-			send([]byte{'H', 'E', 'L', 'L', 'O'})
+			send([]byte{})
 		case p := <-ai.peer.linkOut:
 			send(p)
 			continue
 		case r := <-ai.fromAWDL:
+			//_ = append(util.GetBytes(), r...)
 			ai.peer.handlePacket(r)
 			ai.awdl.core.switchTable.idleIn <- ai.peer.port
 		case <-ai.shutdown:

src/yggdrasil/mobile.go

@@ -24,7 +24,8 @@ import (
 // therefore we use the "dummy" TUN interface instead.
 
 func (c *Core) StartAutoconfigure() error {
-	logger := log.New(os.Stdout, "", 0)
+	mobilelog := MobileLogger{}
+	logger := log.New(mobilelog, "", 0)
 	nc := config.GenerateConfig(true)
 	nc.IfName = "dummy"
 	nc.AdminListen = "tcp://localhost:9001"
@@ -43,7 +44,8 @@ func (c *Core) StartAutoconfigure() error {
 }
 
 func (c *Core) StartJSON(configjson []byte) error {
-	logger := log.New(os.Stdout, "", 0)
+	mobilelog := MobileLogger{}
+	logger := log.New(mobilelog, "", 0)
 	nc := config.GenerateConfig(false)
 	var dat map[string]interface{}
 	if err := hjson.Unmarshal(configjson, &dat); err != nil {

src/yggdrasil/mobile_ios.go

@@ -0,0 +1,25 @@
+// +build mobile,darwin
+
+package yggdrasil
+
+/*
+#cgo CFLAGS: -x objective-c
+#cgo LDFLAGS: -framework Foundation
+#import <Foundation/Foundation.h>
+void Log(const char *text) {
+  NSString *nss = [NSString stringWithUTF8String:text];
+  NSLog(@"%@", nss);
+}
+*/
+import "C"
+import "unsafe"
+
+type MobileLogger struct {
+}
+
+func (nsl MobileLogger) Write(p []byte) (n int, err error) {
+	p = append(p, 0)
+	cstr := (*C.char)(unsafe.Pointer(&p[0]))
+	C.Log(cstr)
+	return len(p), nil
+}

src/yggdrasil/peer.go

@@ -217,6 +217,7 @@ func (p *peer) handlePacket(packet []byte) {
 	default:
 		util.PutBytes(packet)
 	}
+	return
 }
 
 // Called to handle traffic or protocolTraffic packets.