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# -*- coding: utf-8 -*-
#
# iperf-server.py
#
# Author: Toke Høiland-Jørgensen (toke@toke.dk)
# Date: 26 november 2012
# Copyright (c) 2012-2016, Toke Høiland-Jørgensen
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
from __future__ import absolute_import, division, print_function, unicode_literals
import copy
import csv
import json
import subprocess
import threading
import time
iperf_cols = [
'timestamp',
'server_host',
'server_port',
'client_host',
'transfer_id',
'start_time',
'time_interval',
'total_length',
'speed',
'jitter',
'errors',
'datagrams',
'error_percent',
'out_of_order',
]
TIMEOUT = 10.0
class IperfReader(csv.DictReader):
def __init__(self, csvfile):
csv.DictReader.__init__(self, csvfile, fieldnames=iperf_cols)
def line_iterator(fp):
line = fp.readline()
while line:
yield line
line = fp.readline()
class TestData(object):
def __init__(self, r_id):
self._id = r_id
self._last_update = time.time()
self._records = []
def add_record(self, record):
self._records.append(record)
self._last_update = time.time()
def expired(self):
return time.time() - self._last_update > TIMEOUT
def records(self):
return copy.deepcopy(self._records)
class Monitor(threading.Thread):
def __init__(self, *args, **kwargs):
threading.Thread.__init__(self, *args, **kwargs)
self._test_data = {}
self._lock = threading.RLock()
def run(self):
prog = subprocess.Popen(['iperf', '-s', '-u', '-i', '0.5', '-y', 'c'],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=None,
universal_newlines=True)
prog.stdin.close()
reader = IperfReader(line_iterator(prog.stdout))
for record in reader:
self.handle_record(record)
def handle_record(self, record):
parts = record['time_interval'].split("-")
length = float(parts[1]) - float(parts[0])
# too long interval, this is a summary record
if length > 2:
return
r_id = record['transfer_id']
self._lock.acquire()
if r_id not in self._test_data:
self._test_data[r_id] = TestData(r_id)
self._test_data[r_id].add_record(record)
self._lock.release()
self.collect_garbage()
def collect_garbage(self):
self._lock.acquire()
for k, v in list(self._test_data.items()):
if v.expired():
del self._test_data[k]
self._lock.release()
def get_records(self, r_id):
self._lock.acquire()
try:
return self._test_data[r_id].records()
finally:
self._lock.release()
monitor = Monitor()
monitor.start()
while True:
try:
request_id = input().strip()
print(json.dumps(monitor.get_records(request_id)))
except KeyError:
print("No records for id %s." % request_id)
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