NCS/p4_testbed
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feat(evaluation): Added results and modified scripts and execution for a test evaluation

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Signed-off-by: Tuan-Dat Tran <tuan-dat.tran@tudattr.dev>
This commit is contained in:
Tuan-Dat Tran
2024-12-28 00:51:37 +01:00
parent 2f1bcbd5d4
commit d5847cd916
7 changed files with 387 additions and 46 deletions
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43
sender-receiver-scripts/receiver.py
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@@ -6,12 +6,17 @@ from scapy.all import Ether, IP, UDP, send, sendp, Raw, sniff
global initial_timestamp
initial_timestamp = int(time.time() * 1000)
# Simulated ACK sending function
def send_ack(destination_IP, my_port, sender_port):
ack_data = ""
###################
# With localhost:
ack_packet = IP(dst=destination_IP) / UDP(dport=sender_port, sport=my_port) / Raw(load=str(ack_data))
ack_packet = (
IP(dst=destination_IP)
/ UDP(dport=sender_port, sport=my_port)
/ Raw(load=str(ack_data))
)
send(ack_packet, verbose=False)
###################
# With netns:
@@ -20,18 +25,25 @@ def send_ack(destination_IP, my_port, sender_port):
###################
print(f"Sent ACK: {ack_data}")
# Process incoming packets
def process_packet(pkt):
################### Save timestamps ###################
if Raw in pkt:
with open(save_file, "a") as f: # open as "a" for append
with open(save_file, "a") as f: # open as "a" for append
global initial_timestamp
receival_time = str(int(time.time() * 1000) - initial_timestamp) # time of arrival at receiver
send_time = pkt[Raw].load # time it was sent from the sender
receival_time = str(
int(time.time() * 1000) - initial_timestamp
) # time of arrival at receiver
send_time = pkt[Raw].load # time it was sent from the sender
################### Conversion & error handling ###################
try:
send_time = int(send_time.decode("utf-8").split("X")[0]) # decode the payload and stop at "X"
except ValueError: # For the last packet without a timestamp but "END" as payload
send_time = int(
send_time.decode("utf-8").split("X")[0]
) # decode the payload and stop at "X"
except (
ValueError
): # For the last packet without a timestamp but "END" as payload
print(f"END for {my_port}")
send_ack(destination_IP, my_port, sender_port)
return
@@ -45,23 +57,32 @@ def process_packet(pkt):
send_ack(destination_IP, my_port, sender_port)
# Main loop
def main(destination_IP, my_port, sender_port):
###################
# With localhost:
sniff(iface="lo", filter=f"udp and dst port {my_port}", prn=process_packet, store=False)
sniff(
iface="lo",
filter=f"udp and dst port {my_port}",
prn=process_packet,
store=False,
)
###################
# With netns:
# sniff(iface="ns-g", filter=f"udp and dst port {my_port}", prn=process_packet, store=False)
###################
if __name__ == "__main__":
if len(sys.argv) != 4:
print("Usage: python receive_and_ack.py <destination_IP> <my_port> <sender_port>")
print(
"Usage: python receive_and_ack.py <destination_IP> <my_port> <sender_port>"
)
sys.exit(1)
destination_IP = sys.argv[1] # Clear
my_port = int(sys.argv[2]) # Port to listen on
sender_port = int(sys.argv[3]) # Port to send acks to
destination_IP = sys.argv[1] # Clear
my_port = int(sys.argv[2]) # Port to listen on
sender_port = int(sys.argv[3]) # Port to send acks to
save_file = f"timestamps_{my_port}"
main(destination_IP, my_port, sender_port)