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# Copyright 2012 the V8 project authors. All rights reserved.
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following
# disclaimer in the documentation and/or other materials provided
# with the distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import multiprocessing
import os
import shutil
import subprocess
import threading
import time
from . import daemon
from . import local_handler
from . import presence_handler
from . import signatures
from . import status_handler
from . import work_handler
from ..network import perfdata
class Server(daemon.Daemon):
def __init__(self, pidfile, root, stdin="/dev/null",
stdout="/dev/null", stderr="/dev/null"):
super(Server, self).__init__(pidfile, stdin, stdout, stderr)
self.root = root
self.local_handler = None
self.local_handler_thread = None
self.work_handler = None
self.work_handler_thread = None
self.status_handler = None
self.status_handler_thread = None
self.presence_daemon = None
self.presence_daemon_thread = None
self.peers = []
self.jobs = multiprocessing.cpu_count()
self.peer_list_lock = threading.Lock()
self.perf_data_lock = None
self.presence_daemon_lock = None
self.datadir = os.path.join(self.root, "data")
pubkey_fingerprint_filename = os.path.join(self.datadir, "mypubkey")
with open(pubkey_fingerprint_filename) as f:
self.pubkey_fingerprint = f.read().strip()
self.relative_perf_filename = os.path.join(self.datadir, "myperf")
if os.path.exists(self.relative_perf_filename):
with open(self.relative_perf_filename) as f:
try:
self.relative_perf = float(f.read())
except:
self.relative_perf = 1.0
else:
self.relative_perf = 1.0
def run(self):
os.nice(20)
self.ip = presence_handler.GetOwnIP()
self.perf_data_manager = perfdata.PerfDataManager(self.datadir)
self.perf_data_lock = threading.Lock()
self.local_handler = local_handler.LocalSocketServer(self)
self.local_handler_thread = threading.Thread(
target=self.local_handler.serve_forever)
self.local_handler_thread.start()
self.work_handler = work_handler.WorkSocketServer(self)
self.work_handler_thread = threading.Thread(
target=self.work_handler.serve_forever)
self.work_handler_thread.start()
self.status_handler = status_handler.StatusSocketServer(self)
self.status_handler_thread = threading.Thread(
target=self.status_handler.serve_forever)
self.status_handler_thread.start()
self.presence_daemon = presence_handler.PresenceDaemon(self)
self.presence_daemon_thread = threading.Thread(
target=self.presence_daemon.serve_forever)
self.presence_daemon_thread.start()
self.presence_daemon.FindPeers()
time.sleep(0.5) # Give those peers some time to reply.
with self.peer_list_lock:
for p in self.peers:
if p.address == self.ip: continue
status_handler.RequestTrustedPubkeys(p, self)
while True:
try:
self.PeriodicTasks()
time.sleep(60)
except Exception, e:
print("MAIN LOOP EXCEPTION: %s" % e)
self.Shutdown()
break
except KeyboardInterrupt:
self.Shutdown()
break
def Shutdown(self):
with open(self.relative_perf_filename, "w") as f:
f.write("%s" % self.relative_perf)
self.presence_daemon.shutdown()
self.presence_daemon.server_close()
self.local_handler.shutdown()
self.local_handler.server_close()
self.work_handler.shutdown()
self.work_handler.server_close()
self.status_handler.shutdown()
self.status_handler.server_close()
def PeriodicTasks(self):
# If we know peers we don't trust, see if someone else trusts them.
with self.peer_list_lock:
for p in self.peers:
if p.trusted: continue
if self.IsTrusted(p.pubkey):
p.trusted = True
status_handler.ITrustYouNow(p)
continue
for p2 in self.peers:
if not p2.trusted: continue
status_handler.TryTransitiveTrust(p2, p.pubkey, self)
# TODO: Ping for more peers waiting to be discovered.
# TODO: Update the checkout (if currently idle).
def AddPeer(self, peer):
with self.peer_list_lock:
for p in self.peers:
if p.address == peer.address:
return
self.peers.append(peer)
if peer.trusted:
status_handler.ITrustYouNow(peer)
def DeletePeer(self, peer_address):
with self.peer_list_lock:
for i in xrange(len(self.peers)):
if self.peers[i].address == peer_address:
del self.peers[i]
return
def MarkPeerAsTrusting(self, peer_address):
with self.peer_list_lock:
for p in self.peers:
if p.address == peer_address:
p.trusting_me = True
break
def UpdatePeerPerformance(self, peer_address, performance):
with self.peer_list_lock:
for p in self.peers:
if p.address == peer_address:
p.relative_performance = performance
def CopyToTrusted(self, pubkey_filename):
with open(pubkey_filename, "r") as f:
lines = f.readlines()
fingerprint = lines[-1].strip()
target_filename = self._PubkeyFilename(fingerprint)
shutil.copy(pubkey_filename, target_filename)
with self.peer_list_lock:
for peer in self.peers:
if peer.address == self.ip: continue
if peer.pubkey == fingerprint:
status_handler.ITrustYouNow(peer)
else:
result = self.SignTrusted(fingerprint)
status_handler.NotifyNewTrusted(peer, result)
return fingerprint
def _PubkeyFilename(self, pubkey_fingerprint):
return os.path.join(self.root, "trusted", "%s.pem" % pubkey_fingerprint)
def IsTrusted(self, pubkey_fingerprint):
return os.path.exists(self._PubkeyFilename(pubkey_fingerprint))
def ListTrusted(self):
path = os.path.join(self.root, "trusted")
if not os.path.exists(path): return []
return [ f[:-4] for f in os.listdir(path) if f.endswith(".pem") ]
def SignTrusted(self, pubkey_fingerprint):
if not self.IsTrusted(pubkey_fingerprint):
return []
filename = self._PubkeyFilename(pubkey_fingerprint)
result = signatures.ReadFileAndSignature(filename) # Format: [key, sig].
return [pubkey_fingerprint, result[0], result[1], self.pubkey_fingerprint]
def AcceptNewTrusted(self, data):
# The format of |data| matches the return value of |SignTrusted()|.
if not data: return
fingerprint = data[0]
pubkey = data[1]
signature = data[2]
signer = data[3]
if not self.IsTrusted(signer):
return
if self.IsTrusted(fingerprint):
return # Already trust this guy.
filename = self._PubkeyFilename(fingerprint)
signer_pubkeyfile = self._PubkeyFilename(signer)
if not signatures.VerifySignature(filename, pubkey, signature,
signer_pubkeyfile):
return
return # Nothing more to do.
def AddPerfData(self, test_key, duration, arch, mode):
data_store = self.perf_data_manager.GetStore(arch, mode)
data_store.RawUpdatePerfData(str(test_key), duration)
def CompareOwnPerf(self, test, arch, mode):
data_store = self.perf_data_manager.GetStore(arch, mode)
observed = data_store.FetchPerfData(test)
if not observed: return
own_perf_estimate = observed / test.duration
with self.perf_data_lock:
kLearnRateLimiter = 9999
self.relative_perf *= kLearnRateLimiter
self.relative_perf += own_perf_estimate
self.relative_perf /= (kLearnRateLimiter + 1)
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