debug server sends push packet back with correct seq ack

debugServer/sniffer.py

@@ -26,6 +26,9 @@ class Sniffer(Thread):
         self.debug_src = ""
         self.debug_sport = 0
 
+        self.last_ack = 0
+        self.last_seq = 0
+
 
     def run(self):
         self.socket = conf.L2listen(
@@ -73,22 +76,44 @@ class Sniffer(Thread):
                     self.debug_src = packet[IP].src
                     self.debug_sport = tcp_sport
 
+                    self.last_ack = packet[TCP].ack
+                    self.last_seq = packet[TCP].seq
+
                 self.recv_count += 1
 
 
 
+
+
+
+
+
+
+def get_send_payload():
+
+    payload = "BBBBBBBBBBB"
+
+    return payload
+
+
+
 def send_debug_packet(sniffer):
 
     debug_port = sniffer.debug_sport
     debug_ip = sniffer.debug_src
 
+    send_seq = sniffer.last_ack
+    send_ack = sniffer.last_seq
+
+
     if debug_port == 0 or debug_ip == '':
         print("There was no debug source connection to send to")
         return
 
     print("sending debug packet to " + str(debug_ip) + ":" + str(debug_port))
 
-    packet = IP(dst=debug_ip) / TCP(dport=debug_port, sport=server_port, flags='R')
+    send_payload = get_send_payload()
+    packet = IP(dst=debug_ip) / TCP(dport=debug_port, sport=server_port, flags='PA', seq=send_seq, ack=send_ack) / send_payload
     send(packet, iface="ens18")
     print("sent debug packet: ")
     packet.show()