server updates

client/golang/client.go

@@ -1,12 +1,12 @@
 package main
 
 import (
-	"encoding/base64"
+	//"encoding/base64"
 	"encoding/binary"
 	"errors"
 	"fmt"
 	"net"
-	"strings"
+	//"strings"
 	"time"
 
 	"github.com/google/gopacket"
@@ -21,10 +21,11 @@ func errCheck(err error) {
 }
 
 func listenDiscoverResponse(addrChan chan string, readyFlag chan int) {
+	finalMessage := ""
 	handle, err := pcap.OpenLive("any", int32(1600), true, pcap.BlockForever)
 	errCheck(err)
 
-	err = handle.SetBPFFilter("udp and port 8850")
+	err = handle.SetBPFFilter("udp and port 6767")
 	errCheck(err)
 
 	packets := gopacket.NewPacketSource(handle, handle.LinkType()).Packets()
@@ -32,12 +33,17 @@ func listenDiscoverResponse(addrChan chan string, readyFlag chan int) {
 	readyFlag <- 1
 
 	for pkt := range packets {
-		msg, err := base64.StdEncoding.DecodeString(string(pkt.ApplicationLayer().Payload()))
+		finalMessage = ""
+		payload := pkt.ApplicationLayer().Payload()
+		payloadLength := binary.BigEndian.Uint16([]byte{payload[2], payload[3]})
+
+		for i := uint16(0); i < payloadLength - 5; i++ {
+			finalMessage += string(payload[i+9])
+		}
+		fmt.Println(finalMessage)
 		if err == nil {
-			if strings.Contains(string(msg), "clientapi") {
-				addrChan <- string(msg)
-				return
-			}
+			//addrChan <- finalMessage
+			//return
 		}
 	}
 
@@ -102,7 +108,7 @@ func main() {
 	// Listen timeout
 	select {
 		case returnMSG := <- addrChan:
-			fmt.Printf("%s\n", strings.Fields(returnMSG)[1])
+			fmt.Printf("%s\n", returnMSG)
 		case <- time.After(5 * time.Second):
 			fmt.Printf("error\n")
 	}