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debug server sends push packet back with correct seq ack

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This commit is contained in:
Beau Kujath 2023-06-09 11:14:49 -06:00
parent 6c1261d994
commit e32dfbdabe
1 changed files with 26 additions and 1 deletions
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27
debugServer/sniffer.py
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@ -26,6 +26,9 @@ class Sniffer(Thread):
self.debug_src = "" self.debug_src = ""
self.debug_sport = 0 self.debug_sport = 0
self.last_ack = 0
self.last_seq = 0
def run(self): def run(self):
self.socket = conf.L2listen( self.socket = conf.L2listen(
@ -73,22 +76,44 @@ class Sniffer(Thread):
self.debug_src = packet[IP].src self.debug_src = packet[IP].src
self.debug_sport = tcp_sport self.debug_sport = tcp_sport
self.last_ack = packet[TCP].ack
self.last_seq = packet[TCP].seq
self.recv_count += 1 self.recv_count += 1
def get_send_payload():
payload = "BBBBBBBBBBB"
return payload
def send_debug_packet(sniffer): def send_debug_packet(sniffer):
debug_port = sniffer.debug_sport debug_port = sniffer.debug_sport
debug_ip = sniffer.debug_src debug_ip = sniffer.debug_src
send_seq = sniffer.last_ack
send_ack = sniffer.last_seq
if debug_port == 0 or debug_ip == '': if debug_port == 0 or debug_ip == '':
print("There was no debug source connection to send to") print("There was no debug source connection to send to")
return return
print("sending debug packet to " + str(debug_ip) + ":" + str(debug_port)) 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") send(packet, iface="ens18")
print("sent debug packet: ") print("sent debug packet: ")
packet.show() packet.show()