392 lines
16 KiB
Python
392 lines
16 KiB
Python
#!/usr/bin/env python3
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'''
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Onionr - Private P2P Communication
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This file contains both the OnionrCommunicate class for communcating with peers
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and code to operate as a daemon, getting commands from the command queue database (see core.Core.daemonQueue)
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'''
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'''
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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'''
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import sys, os, time
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import core, config, logger, onionr
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import onionrexceptions, onionrpeers, onionrevents as events, onionrplugins as plugins, onionrblockapi as block
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from communicatorutils import servicecreator, onionrcommunicatortimers
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from communicatorutils import downloadblocks, lookupblocks, lookupadders
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from communicatorutils import servicecreator, connectnewpeers, uploadblocks
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from communicatorutils import daemonqueuehandler, announcenode, deniableinserts
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from communicatorutils import cooldownpeer, housekeeping, netcheck
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from etc import humanreadabletime
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import onionrservices, onionr, onionrproofs
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OnionrCommunicatorTimers = onionrcommunicatortimers.OnionrCommunicatorTimers
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config.reload()
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class OnionrCommunicatorDaemon:
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def __init__(self, onionrInst, proxyPort, developmentMode=config.get('general.dev_mode', False)):
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onionrInst.communicatorInst = self
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# configure logger and stuff
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onionr.Onionr.setupConfig('data/', self = self)
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self.proxyPort = proxyPort
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self.isOnline = True # Assume we're connected to the internet
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# list of timer instances
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self.timers = []
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# initialize core with Tor socks port being 3rd argument
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self.proxyPort = proxyPort
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self._core = onionrInst.onionrCore
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self.blocksToUpload = []
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# loop time.sleep delay in seconds
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self.delay = 1
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# lists of connected peers and peers we know we can't reach currently
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self.onlinePeers = []
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self.offlinePeers = []
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self.cooldownPeer = {}
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self.connectTimes = {}
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self.peerProfiles = [] # list of peer's profiles (onionrpeers.PeerProfile instances)
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self.newPeers = [] # Peers merged to us. Don't add to db until we know they're reachable
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self.announceProgress = {}
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self.announceCache = {}
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# amount of threads running by name, used to prevent too many
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self.threadCounts = {}
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# set true when shutdown command received
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self.shutdown = False
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# list of new blocks to download, added to when new block lists are fetched from peers
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self.blockQueue = {}
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# list of blocks currently downloading, avoid s
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self.currentDownloading = []
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# timestamp when the last online node was seen
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self.lastNodeSeen = None
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# Dict of time stamps for peer's block list lookup times, to avoid downloading full lists all the time
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self.dbTimestamps = {}
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# Clear the daemon queue for any dead messages
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if os.path.exists(self._core.queueDB):
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self._core.clearDaemonQueue()
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# Loads in and starts the enabled plugins
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plugins.reload()
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# time app started running for info/statistics purposes
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self.startTime = self._core._utils.getEpoch()
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if developmentMode:
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OnionrCommunicatorTimers(self, self.heartbeat, 30)
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# Set timers, function reference, seconds
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# requiresPeer True means the timer function won't fire if we have no connected peers
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peerPoolTimer = OnionrCommunicatorTimers(self, self.getOnlinePeers, 60, maxThreads=1)
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OnionrCommunicatorTimers(self, self.runCheck, 2, maxThreads=1)
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# Timers to periodically lookup new blocks and download them
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OnionrCommunicatorTimers(self, self.lookupBlocks, self._core.config.get('timers.lookupBlocks'), requiresPeer=True, maxThreads=1)
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OnionrCommunicatorTimers(self, self.getBlocks, self._core.config.get('timers.getBlocks'), requiresPeer=True, maxThreads=2)
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# Timer to reset the longest offline peer so contact can be attempted again
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OnionrCommunicatorTimers(self, self.clearOfflinePeer, 58)
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# Timer to cleanup old blocks
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blockCleanupTimer = OnionrCommunicatorTimers(self, housekeeping.clean_old_blocks, 65, myArgs=[self])
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# Timer to discover new peers
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OnionrCommunicatorTimers(self, self.lookupAdders, 60, requiresPeer=True)
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# Timer for adjusting which peers we actively communicate to at any given time, to avoid over-using peers
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OnionrCommunicatorTimers(self, cooldownpeer.cooldown_peer, 30, myArgs=[self], requiresPeer=True)
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# Timer to read the upload queue and upload the entries to peers
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OnionrCommunicatorTimers(self, self.uploadBlock, 5, requiresPeer=True, maxThreads=1)
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# Timer to process the daemon command queue
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OnionrCommunicatorTimers(self, self.daemonCommands, 6, maxThreads=3)
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# Timer that kills Onionr if the API server crashes
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OnionrCommunicatorTimers(self, self.detectAPICrash, 30, maxThreads=1)
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# Setup direct connections
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if config.get('general.socket_servers', False):
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self.services = onionrservices.OnionrServices(self._core)
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self.active_services = []
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self.service_greenlets = []
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OnionrCommunicatorTimers(self, servicecreator.service_creator, 5, maxThreads=50, myArgs=[self])
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else:
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self.services = None
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# This timer creates deniable blocks, in an attempt to further obfuscate block insertion metadata
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if config.get('general.insert_deniable_blocks', True):
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deniableBlockTimer = OnionrCommunicatorTimers(self, deniableinserts.insert_deniable_block, 180, myArgs=[self], requiresPeer=True, maxThreads=1)
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deniableBlockTimer.count = (deniableBlockTimer.frequency - 175)
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# Timer to check for connectivity, through Tor to various high-profile onion services
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netCheckTimer = OnionrCommunicatorTimers(self, netcheck.net_check, 600, myArgs=[self])
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# Announce the public API server transport address to other nodes if security level allows
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if config.get('general.security_level', 1) == 0:
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# Default to high security level incase config breaks
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announceTimer = OnionrCommunicatorTimers(self, announcenode.announce_node, 3600, myArgs=[self], requiresPeer=True, maxThreads=1)
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announceTimer.count = (announceTimer.frequency - 120)
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else:
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logger.debug('Will not announce node.')
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# Timer to delete malfunctioning or long-dead peers
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cleanupTimer = OnionrCommunicatorTimers(self, self.peerCleanup, 300, requiresPeer=True)
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# Timer to cleanup dead ephemeral forward secrecy keys
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forwardSecrecyTimer = OnionrCommunicatorTimers(self, housekeeping.clean_keys, 15, myArgs=[self], maxThreads=1)
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# Adjust initial timer triggers
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peerPoolTimer.count = (peerPoolTimer.frequency - 1)
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cleanupTimer.count = (cleanupTimer.frequency - 60)
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blockCleanupTimer.count = (blockCleanupTimer.frequency - 5)
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# Main daemon loop, mainly for calling timers, don't do any complex operations here to avoid locking
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try:
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while not self.shutdown:
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for i in self.timers:
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if self.shutdown:
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break
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i.processTimer()
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time.sleep(self.delay)
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# Debug to print out used FDs (regular and net)
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#proc = psutil.Process()
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#print(proc.open_files(), len(psutil.net_connections()))
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except KeyboardInterrupt:
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self.shutdown = True
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pass
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logger.info('Goodbye. (Onionr is cleaning up, and will exit)')
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try:
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self.service_greenlets
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except AttributeError:
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pass
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else:
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for server in self.service_greenlets:
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server.stop()
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self._core._utils.localCommand('shutdown') # shutdown the api
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time.sleep(0.5)
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def lookupAdders(self):
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'''Lookup new peer addresses'''
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lookupadders.lookup_new_peer_transports_with_communicator(self)
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def lookupBlocks(self):
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'''Lookup new blocks & add them to download queue'''
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lookupblocks.lookup_blocks_from_communicator(self)
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def getBlocks(self):
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'''download new blocks in queue'''
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downloadblocks.download_blocks_from_communicator(self)
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def decrementThreadCount(self, threadName):
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'''Decrement amount of a thread name if more than zero, called when a function meant to be run in a thread ends'''
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try:
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if self.threadCounts[threadName] > 0:
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self.threadCounts[threadName] -= 1
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except KeyError:
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pass
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def pickOnlinePeer(self):
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'''randomly picks peer from pool without bias (using secrets module)'''
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retData = ''
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while True:
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peerLength = len(self.onlinePeers)
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if peerLength <= 0:
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break
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try:
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# get a random online peer, securely. May get stuck in loop if network is lost or if all peers in pool magically disconnect at once
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retData = self.onlinePeers[self._core._crypto.secrets.randbelow(peerLength)]
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except IndexError:
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pass
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else:
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break
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return retData
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def clearOfflinePeer(self):
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'''Removes the longest offline peer to retry later'''
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try:
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removed = self.offlinePeers.pop(0)
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except IndexError:
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pass
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else:
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logger.debug('Removed ' + removed + ' from offline list, will try them again.')
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self.decrementThreadCount('clearOfflinePeer')
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def getOnlinePeers(self):
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'''
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Manages the self.onlinePeers attribute list, connects to more peers if we have none connected
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'''
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logger.debug('Refreshing peer pool...')
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maxPeers = int(config.get('peers.max_connect', 10))
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needed = maxPeers - len(self.onlinePeers)
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for i in range(needed):
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if len(self.onlinePeers) == 0:
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self.connectNewPeer(useBootstrap=True)
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else:
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self.connectNewPeer()
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if self.shutdown:
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break
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else:
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if len(self.onlinePeers) == 0:
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logger.debug('Couldn\'t connect to any peers.' + (' Last node seen %s ago.' % humanreadabletime.human_readable_time(time.time() - self.lastNodeSeen) if not self.lastNodeSeen is None else ''))
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else:
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self.lastNodeSeen = time.time()
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self.decrementThreadCount('getOnlinePeers')
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def addBootstrapListToPeerList(self, peerList):
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'''
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Add the bootstrap list to the peer list (no duplicates)
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'''
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for i in self._core.bootstrapList:
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if i not in peerList and i not in self.offlinePeers and i != self._core.hsAddress and len(str(i).strip()) > 0:
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peerList.append(i)
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self._core.addAddress(i)
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def connectNewPeer(self, peer='', useBootstrap=False):
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'''Adds a new random online peer to self.onlinePeers'''
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connectnewpeers.connect_new_peer_to_communicator(self, peer, useBootstrap)
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def removeOnlinePeer(self, peer):
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'''Remove an online peer'''
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try:
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del self.connectTimes[peer]
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except KeyError:
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pass
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try:
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del self.dbTimestamps[peer]
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except KeyError:
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pass
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try:
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self.onlinePeers.remove(peer)
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except ValueError:
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pass
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def peerCleanup(self):
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'''This just calls onionrpeers.cleanupPeers, which removes dead or bad peers (offline too long, too slow)'''
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onionrpeers.peerCleanup(self._core)
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self.decrementThreadCount('peerCleanup')
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def printOnlinePeers(self):
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'''logs online peer list'''
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if len(self.onlinePeers) == 0:
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logger.warn('No online peers')
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else:
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logger.info('Online peers:')
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for i in self.onlinePeers:
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score = str(self.getPeerProfileInstance(i).score)
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logger.info(i + ', score: ' + score)
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def peerAction(self, peer, action, data='', returnHeaders=False):
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'''Perform a get request to a peer'''
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if len(peer) == 0:
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return False
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#logger.debug('Performing ' + action + ' with ' + peer + ' on port ' + str(self.proxyPort))
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url = 'http://%s/%s' % (peer, action)
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if len(data) > 0:
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url += '&data=' + data
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self._core.setAddressInfo(peer, 'lastConnectAttempt', self._core._utils.getEpoch()) # mark the time we're trying to request this peer
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retData = self._core._utils.doGetRequest(url, port=self.proxyPort)
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# if request failed, (error), mark peer offline
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if retData == False:
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try:
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self.getPeerProfileInstance(peer).addScore(-10)
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self.removeOnlinePeer(peer)
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if action != 'ping':
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self.getOnlinePeers() # Will only add a new peer to pool if needed
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except ValueError:
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pass
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else:
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self._core.setAddressInfo(peer, 'lastConnect', self._core._utils.getEpoch())
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self.getPeerProfileInstance(peer).addScore(1)
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return retData # If returnHeaders, returns tuple of data, headers. if not, just data string
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def getPeerProfileInstance(self, peer):
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'''Gets a peer profile instance from the list of profiles, by address name'''
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for i in self.peerProfiles:
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# if the peer's profile is already loaded, return that
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if i.address == peer:
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retData = i
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break
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else:
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# if the peer's profile is not loaded, return a new one. connectNewPeer adds it the list on connect
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retData = onionrpeers.PeerProfiles(peer, self._core)
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return retData
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def getUptime(self):
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return self._core._utils.getEpoch() - self.startTime
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def heartbeat(self):
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'''Show a heartbeat debug message'''
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logger.debug('Heartbeat. Node running for %s.' % humanreadabletime.human_readable_time(self.getUptime()))
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self.decrementThreadCount('heartbeat')
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def daemonCommands(self):
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'''
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Process daemon commands from daemonQueue
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'''
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daemonqueuehandler.handle_daemon_commands(self)
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def uploadBlock(self):
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'''Upload our block to a few peers'''
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uploadblocks.upload_blocks_from_communicator(self)
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def announce(self, peer):
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'''Announce to peers our address'''
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if announcenode.announce_node(self) == False:
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logger.warn('Could not introduce node.')
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def detectAPICrash(self):
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'''exit if the api server crashes/stops'''
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if self._core._utils.localCommand('ping', silent=False) not in ('pong', 'pong!'):
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for i in range(20):
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if self._core._utils.localCommand('ping') in ('pong', 'pong!') or self.shutdown:
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break # break for loop
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time.sleep(1)
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else:
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# This executes if the api is NOT detected to be running
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events.event('daemon_crash', onionr = self._core.onionrInst, data = {})
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logger.error('Daemon detected API crash (or otherwise unable to reach API after long time), stopping...')
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self.shutdown = True
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self.decrementThreadCount('detectAPICrash')
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def runCheck(self):
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if run_file_exists(self):
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logger.debug('Status check; looks good.')
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self.decrementThreadCount('runCheck')
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def startCommunicator(onionrInst, proxyPort):
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OnionrCommunicatorDaemon(onionrInst, proxyPort)
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def run_file_exists(daemon):
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if os.path.isfile(daemon._core.dataDir + '.runcheck'):
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os.remove(daemon._core.dataDir + '.runcheck')
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return True
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return False |