Xxx-Bin
commented
2 years ago A little test code
#!/usr/bin/python
# Write Python 3 code in this online editor and run it.
def addTimestamp(key, packetReceived, tcp_timestamp, tcp_timestamp_echo_reply, tcp_seq):
if not key in timestamps:
timestamps[key] = {
'timestamps': [tcp_timestamp],
'timestamp_echo_replies' :[tcp_timestamp_echo_reply],
'clock_ticks': [packetReceived],
'seq_nums': [tcp_seq],
'deltas':[]
}
elif len(timestamps[key].get('timestamps', [])) <= 20:
timestamps[key]['timestamps'].append(tcp_timestamp)
timestamps[key]['timestamp_echo_replies'].append(tcp_timestamp_echo_reply)
timestamps[key]['clock_ticks'].append(packetReceived)
timestamps[key]['seq_nums'].append(tcp_seq)
tss = timestamps[key].get('timestamps', [])
ticks = timestamps[key].get('clock_ticks', [])
deltas = timestamps[key].get('deltas', [])
if len(tss) >= 2:
i = len(tss)-2
rtt = int(tss[i+1]) - int(tss[i])
real = ticks[i+1] - ticks[i]
deltas.append('rtt={}, clock={}'.format(rtt, real))
timestamps[key]['deltas'] = deltas
def addTimestamp2(key, packetReceived, tcp_timestamp, tcp_timestamp_echo_reply, tcp_seq):
if not key in timestamps:
timestamps[key] = {
'timestamps': [tcp_timestamp],
'timestamp_echo_replies' :[tcp_timestamp_echo_reply],
'clock_ticks': [packetReceived],
'seq_nums': [tcp_seq]
}
elif len(timestamps[key].get('timestamps', [])) <= 20:
timestamps[key]['timestamps'].append(tcp_timestamp)
timestamps[key]['timestamp_echo_replies'].append(tcp_timestamp_echo_reply)
timestamps[key]['clock_ticks'].append(packetReceived)
timestamps[key]['seq_nums'].append(tcp_seq)
tss = timestamps[key].get('timestamps', [])
ticks = timestamps[key].get('clock_ticks', [])
deltas = []
if len(tss) > 2:
for i in range(len(tss) - 1):
rtt = int(tss[i+1]) - int(tss[i])
real = ticks[i+1] - ticks[i]
deltas.append('rtt={}, clock={}'.format(rtt, real))
timestamps[key]['deltas'] = deltas
timestamps = {}
addTimestamp(1,1662283217.969,4026246295,0,0)
addTimestamp(1,1662283217.974,4026246300,392710821,1)
addTimestamp(1,1662283217.976,4026246301,392710821,1)
addTimestamp(1,1662283217.979,4026246305,392710828,1)
print(timestamps)
timestamps1 = timestamps
timestamps = {}
addTimestamp2(1,1662283217.969,4026246295,0,0)
addTimestamp2(1,1662283217.974,4026246300,392710821,1)
addTimestamp2(1,1662283217.976,4026246301,392710821,1)
addTimestamp2(1,1662283217.979,4026246305,392710828,1)
print(timestamps)
print(timestamps1 == timestamps)
addTimestamp function optimization, deltas only need to incrementally calculate the last 2.