update

server/main.go

@@ -68,7 +68,7 @@ func main() {
 	defer f.Close()
 
 	writer := csv.NewWriter(f)
-	writer.Write([]string{"sequence_number", "drone_send_time", "ground_recv_time", "latency_ns", "bytes_received"})
+	writer.Write([]string{"message_id", "chunk_index", "total_chunks", "drone_send_time", "ground_recv_time", "latency_ns", "bytes_received"})
 	writer.Flush()
 
 	// Mutex to protect CSV writer if multiple streams are used
@@ -99,7 +99,7 @@ func main() {
 						}
 						
 						length := binary.BigEndian.Uint32(header)
-						if length < 20 {
+						if length < 36 {
 							fmt.Printf("Warning: Invalid frame length %d\n", length)
 							continue
 						}
@@ -114,20 +114,24 @@ func main() {
 						
 						recvTime := time.Now().UnixNano()
 						
-						seqNum := binary.BigEndian.Uint64(payload[0:8])
+						msgId := binary.BigEndian.Uint64(payload[0:8])
 						sendTime := binary.BigEndian.Uint64(payload[8:16])
+						chunkIdx := binary.BigEndian.Uint64(payload[16:24])
+						totalChunks := binary.BigEndian.Uint64(payload[24:32])
 						latency := recvTime - int64(sendTime)
 						
 						mu.Lock()
 						writer.Write([]string{
-							strconv.FormatUint(seqNum, 10),
+							strconv.FormatUint(msgId, 10),
+							strconv.FormatUint(chunkIdx, 10),
+							strconv.FormatUint(totalChunks, 10),
 							strconv.FormatUint(sendTime, 10),
 							strconv.FormatInt(recvTime, 10),
 							strconv.FormatInt(latency, 10),
 							strconv.FormatUint(uint64(length), 10),
 						})
 						// Periodically flush? 
-						if seqNum % 1000 == 0 {
+						if msgId % 1000 == 0 {
 							writer.Flush()
 						}
 						mu.Unlock()