Add more debug information

pndp/process.go

@@ -56,7 +56,7 @@ func (obj *ResponderObj) start() {
 	}()
 	go respond(obj.iface, requests, ndp_ADV, obj.filter, obj.autosense, obj.stopWG, obj.stopChan)
 	go listen(obj.iface, requests, ndp_SOL, obj.stopWG, obj.stopChan)
-	fmt.Println("Started responder instance")
+	fmt.Println("Started responder instance on interface ", obj.iface)
 	<-obj.stopChan
 }
 
@@ -122,6 +122,7 @@ func (obj *ProxyObj) start() {
 	go listen(obj.iface2, req_iface2_adv_iface1, ndp_ADV, obj.stopWG, obj.stopChan)
 	go respond(obj.iface1, req_iface2_adv_iface1, ndp_ADV, nil, "", obj.stopWG, obj.stopChan)
 
+	fmt.Println("Started Proxy instance for interfaces: ", obj.iface1, " and ", obj.iface2)
 	<-obj.stopChan
 }
 

pndp/rawsocket.go

@@ -62,7 +62,9 @@ func listen(iface string, responder chan *ndpRequest, requestType ndpType, stopW
 		syscall.Close(fd)
 		stopWG.Done() // syscall.read does not release when the file descriptor is closed
 	}()
-	fmt.Println("Obtained fd ", fd)
+	if GlobalDebug {
+		fmt.Println("Obtained fd ", fd)
+	}
 
 	if len([]byte(iface)) > syscall.IFNAMSIZ {
 		panic("Interface size larger then maximum allowed by the kernel")
@@ -113,6 +115,7 @@ func listen(iface string, responder chan *ndpRequest, requestType ndpType, stopW
 			panic(err)
 		}
 		if GlobalDebug {
+			fmt.Println("Got packet on", iface, "of type", requestType)
 			fmt.Println("Source IP:")
 			fmt.Printf("% X\n", buf[:numRead][22:38])
 			fmt.Println("Destination IP:")

pndp/responder.go

@@ -87,6 +87,10 @@ func respond(iface string, requests chan *ndpRequest, respondType ndpType, filte
 			}
 		}
 
+		if GlobalDebug {
+			fmt.Println("Getting ready to send packet of type", respondType, "out on interface", iface)
+		}
+
 		if n.sourceIface == iface {
 			pkt(fd, result, n.srcIP, n.answeringForIP, niface.HardwareAddr, respondType)
 		} else {