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#!/usr/bin/env python2.7
# Copyright 2015 gRPC authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Manage TCP ports for unit tests; started by run_tests.py"""
from __future__ import print_function
import argparse
from six.moves.BaseHTTPServer import HTTPServer, BaseHTTPRequestHandler
from six.moves.socketserver import ThreadingMixIn
import hashlib
import os
import socket
import sys
import time
import random
import threading
import platform
# increment this number whenever making a change to ensure that
# the changes are picked up by running CI servers
# note that all changes must be backwards compatible
_MY_VERSION = 21
if len(sys.argv) == 2 and sys.argv[1] == 'dump_version':
print(_MY_VERSION)
sys.exit(0)
argp = argparse.ArgumentParser(description='Server for httpcli_test')
argp.add_argument('-p', '--port', default=12345, type=int)
argp.add_argument('-l', '--logfile', default=None, type=str)
args = argp.parse_args()
if args.logfile is not None:
sys.stdin.close()
sys.stderr.close()
sys.stdout.close()
sys.stderr = open(args.logfile, 'w')
sys.stdout = sys.stderr
print('port server running on port %d' % args.port)
pool = []
in_use = {}
mu = threading.Lock()
# Cronet restricts the following ports to be used (see
# https://cs.chromium.org/chromium/src/net/base/port_util.cc). When one of these
# ports is used in a Cronet test, the test would fail (see issue #12149). These
# ports must be excluded from pool.
cronet_restricted_ports = [
1, 7, 9, 11, 13, 15, 17, 19, 20, 21, 22, 23, 25, 37, 42, 43, 53, 77, 79, 87,
95, 101, 102, 103, 104, 109, 110, 111, 113, 115, 117, 119, 123, 135, 139,
143, 179, 389, 465, 512, 513, 514, 515, 526, 530, 531, 532, 540, 556, 563,
587, 601, 636, 993, 995, 2049, 3659, 4045, 6000, 6665, 6666, 6667, 6668,
6669, 6697
]
def can_connect(port):
# this test is only really useful on unices where SO_REUSE_PORT is available
# so on Windows, where this test is expensive, skip it
if platform.system() == 'Windows':
return False
s = socket.socket()
try:
s.connect(('localhost', port))
return True
except socket.error as e:
return False
finally:
s.close()
def can_bind(port, proto):
s = socket.socket(proto, socket.SOCK_STREAM)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
try:
s.bind(('localhost', port))
return True
except socket.error as e:
return False
finally:
s.close()
def refill_pool(max_timeout, req):
"""Scan for ports not marked for being in use"""
chk = [
port for port in range(1025, 32766)
if port not in cronet_restricted_ports
]
random.shuffle(chk)
for i in chk:
if len(pool) > 100:
break
if i in in_use:
age = time.time() - in_use[i]
if age < max_timeout:
continue
req.log_message("kill old request %d" % i)
del in_use[i]
if can_bind(i, socket.AF_INET) and can_bind(
i, socket.AF_INET6) and not can_connect(i):
req.log_message("found available port %d" % i)
pool.append(i)
def allocate_port(req):
global pool
global in_use
global mu
mu.acquire()
max_timeout = 600
while not pool:
refill_pool(max_timeout, req)
if not pool:
req.log_message("failed to find ports: retrying soon")
mu.release()
time.sleep(1)
mu.acquire()
max_timeout /= 2
port = pool[0]
pool = pool[1:]
in_use[port] = time.time()
mu.release()
return port
keep_running = True
class Handler(BaseHTTPRequestHandler):
def setup(self):
# If the client is unreachable for 5 seconds, close the connection
self.timeout = 5
BaseHTTPRequestHandler.setup(self)
def do_GET(self):
global keep_running
global mu
if self.path == '/get':
# allocate a new port, it will stay bound for ten minutes and until
# it's unused
self.send_response(200)
self.send_header('Content-Type', 'text/plain')
self.end_headers()
p = allocate_port(self)
self.log_message('allocated port %d' % p)
self.wfile.write(str(p).encode('ascii'))
elif self.path[0:6] == '/drop/':
self.send_response(200)
self.send_header('Content-Type', 'text/plain')
self.end_headers()
p = int(self.path[6:])
mu.acquire()
if p in in_use:
del in_use[p]
pool.append(p)
k = 'known'
else:
k = 'unknown'
mu.release()
self.log_message('drop %s port %d' % (k, p))
elif self.path == '/version_number':
# fetch a version string and the current process pid
self.send_response(200)
self.send_header('Content-Type', 'text/plain')
self.end_headers()
self.wfile.write(str(_MY_VERSION).encode('ascii'))
elif self.path == '/dump':
# yaml module is not installed on Macs and Windows machines by default
# so we import it lazily (/dump action is only used for debugging)
import yaml
self.send_response(200)
self.send_header('Content-Type', 'text/plain')
self.end_headers()
mu.acquire()
now = time.time()
out = yaml.dump({
'pool': pool,
'in_use': dict((k, now - v) for k, v in in_use.items())
})
mu.release()
self.wfile.write(out.encode('ascii'))
elif self.path == '/quitquitquit':
self.send_response(200)
self.end_headers()
self.server.shutdown()
class ThreadedHTTPServer(ThreadingMixIn, HTTPServer):
"""Handle requests in a separate thread"""
ThreadedHTTPServer(('', args.port), Handler).serve_forever()
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