430 lines
18 KiB
Python
Executable File
430 lines
18 KiB
Python
Executable File
#!/usr/bin/env python3
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'''
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Onionr - P2P Microblogging Platform & Social network.
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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, core, config, json, onionrblockapi as block, requests, time, logger, threading, onionrplugins as plugins, base64, onionr
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import onionrexceptions
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from defusedxml import minidom
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class OnionrCommunicatorDaemon:
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def __init__(self, debug, developmentMode):
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logger.warn('New (unstable) communicator is being used.')
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# list of timer instances
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self.timers = []
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# initalize core with Tor socks port being 3rd argument
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self.proxyPort = sys.argv[2]
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self._core = core.Core(torPort=self.proxyPort)
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# intalize NIST beacon salt and time
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self.nistSaltTimestamp = 0
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self.powSalt = 0
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# loop time.sleep delay in seconds
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self.delay = 1
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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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# 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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# 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 recieved
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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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# 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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if debug or developmentMode:
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OnionrCommunicatorTimers(self, self.heartbeat, 10)
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# Print nice header thing :)
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if config.get('general.display_header', True) and not self.shutdown:
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self.header()
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# Set timers, function reference, seconds
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OnionrCommunicatorTimers(self, self.daemonCommands, 5)
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OnionrCommunicatorTimers(self, self.detectAPICrash, 5)
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peerPoolTimer = OnionrCommunicatorTimers(self, self.getOnlinePeers, 60)
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OnionrCommunicatorTimers(self, self.lookupBlocks, 7, requiresPeer=True)
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OnionrCommunicatorTimers(self, self.getBlocks, 10, requiresPeer=True)
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OnionrCommunicatorTimers(self, self.clearOfflinePeer, 120)
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OnionrCommunicatorTimers(self, self.lookupKeys, 125, requiresPeer=True)
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OnionrCommunicatorTimers(self, self.lookupAdders, 600, requiresPeer=True)
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# set loop to execute instantly to load up peer pool (replaced old pool init wait)
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peerPoolTimer.count = (peerPoolTimer.frequency - 1)
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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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except KeyboardInterrupt:
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self.shutdown = True
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pass
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logger.info('Goodbye.')
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self._core._utils.localCommand('shutdown')
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time.sleep(0.5)
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def lookupKeys(self):
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'''Lookup new keys'''
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logger.debug('Looking up new keys...')
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tryAmount = 1
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for i in range(tryAmount):
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# Download new key list from random online peers
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peer = self.pickOnlinePeer()
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newKeys = self.peerAction(peer, action='kex')
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self._core._utils.mergeKeys(newKeys)
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self.decrementThreadCount('lookupKeys')
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return
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def lookupAdders(self):
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'''Lookup new peer addresses'''
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logger.info('LOOKING UP NEW ADDRESSES')
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tryAmount = 1
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for i in range(tryAmount):
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# Download new peer address list from random online peers
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peer = self.pickOnlinePeer()
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newAdders = self.peerAction(peer, action='pex')
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self._core._utils.mergeAdders(newAdders)
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self.decrementThreadCount('lookupKeys')
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def lookupBlocks(self):
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'''Lookup new blocks & add them to download queue'''
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logger.info('LOOKING UP NEW BLOCKS')
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tryAmount = 2
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newBlocks = ''
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for i in range(tryAmount):
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peer = self.pickOnlinePeer() # select random online peer
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newDBHash = self.peerAction(peer, 'getDBHash') # get their db hash
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if newDBHash == False:
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continue # if request failed, restart loop (peer is added to offline peers automatically)
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if newDBHash != self._core.getAddressInfo(peer, 'DBHash'):
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self._core.setAddressInfo(peer, 'DBHash', newDBHash)
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newBlocks = self.peerAction(peer, 'getBlockHashes')
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if newBlocks != False:
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# if request was a success
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for i in newBlocks.split('\n'):
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if self._core._utils.validateHash(i):
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# if newline seperated string is valid hash
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if not os.path.exists('data/blocks/' + i + '.db'):
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# if block does not exist on disk and is not already in block queue
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if i not in self.blockQueue:
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self.blockQueue.append(i)
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self.decrementThreadCount('lookupBlocks')
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return
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def getBlocks(self):
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'''download new blocks in queue'''
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for blockHash in self.blockQueue:
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logger.info("Attempting to download %s..." % blockHash)
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content = self.peerAction(self.pickOnlinePeer(), 'getData', data=blockHash) # block content from random peer (includes metadata)
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if content != False:
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try:
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content = content.encode()
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except AttributeError:
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pass
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content = base64.b64decode(content) # content is base64 encoded in transport
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realHash = self._core._crypto.sha3Hash(content)
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try:
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realHash = realHash.decode() # bytes on some versions for some reason
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except AttributeError:
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pass
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if realHash == blockHash:
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content = content.decode() # decode here because sha3Hash needs bytes above
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metas = self._core._utils.getBlockMetadataFromData(content) # returns tuple(metadata, meta), meta is also in metadata
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metadata = metas[0]
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meta = metas[1]
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if self._core._utils.validateMetadata(metadata): # check if metadata is valid
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if self._core._crypto.verifyPow(content): # check if POW is enough/correct
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logger.info('Block passed proof, saving.')
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self._core.setData(content)
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self._core.addToBlockDB(blockHash, dataSaved=True)
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else:
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logger.warn('POW failed for block ' + blockHash)
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else:
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logger.warn('Metadata for ' + blockHash + ' is invalid.')
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else:
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# if block didn't meet expected hash
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tempHash = self._core._crypto.sha3Hash(content) # lazy hack, TODO use var
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try:
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tempHash = tempHash.decode()
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except AttributeError:
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pass
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logger.warn('Block hash validation failed for ' + blockHash + ' got ' + tempHash)
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self.blockQueue.remove(blockHash) # remove from block queue both if success or false
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self.decrementThreadCount('getBlocks')
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return
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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 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 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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'''Manages the self.onlinePeers attribute list, connects to more peers if we have none connected'''
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logger.info('Refreshing peer pool.')
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maxPeers = 4
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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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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.warn('Could not connect to any peer.')
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self.decrementThreadCount('getOnlinePeers')
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def addBootstrapListToPeerList(self, peerList):
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'''Add the bootstrap list to the peer list (no duplicates)'''
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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.hsAdder:
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peerList.append(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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retData = False
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tried = self.offlinePeers
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if peer != '':
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if self._core._utils.validateID(peer):
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peerList = [peer]
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else:
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raise onionrexceptions.InvalidAddress('Will not attempt connection test to invalid address')
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else:
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peerList = self._core.listAdders()
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if len(peerList) == 0 or useBootstrap:
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# Avoid duplicating bootstrap addresses in peerList
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self.addBootstrapListToPeerList(peerList)
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for address in peerList:
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if len(address) == 0 or address in tried or address in self.onlinePeers:
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continue
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if self.peerAction(address, 'ping') == 'pong!':
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logger.info('Connected to ' + address)
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time.sleep(0.1)
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if address not in self.onlinePeers:
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self.onlinePeers.append(address)
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retData = address
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break
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else:
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tried.append(address)
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logger.debug('Failed to connect to ' + address)
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return retData
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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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logger.info(i)
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def peerAction(self, peer, action, data=''):
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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.info('Performing ' + action + ' with ' + peer + ' on port ' + str(self.proxyPort))
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url = 'http://' + peer + '/public/?action=' + action
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if len(data) > 0:
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url += '&data=' + data
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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.onlinePeers.remove(peer)
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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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return retData
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def heartbeat(self):
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'''Show a heartbeat debug message'''
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currentTime = self._core._utils.getEpoch() - self.startTime
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logger.debug('heartbeat, running seconds: ' + str(currentTime))
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self.decrementThreadCount('heartbeat')
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def daemonCommands(self):
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'''process daemon commands from daemonQueue'''
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cmd = self._core.daemonQueue()
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if cmd is not False:
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if cmd[0] == 'shutdown':
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self.shutdown = True
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elif cmd[0] == 'announceNode':
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self.announce(cmd[1])
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elif cmd[0] == 'runCheck':
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logger.debug('Status check; looks good.')
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open('data/.runcheck', 'w+').close()
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elif cmd[0] == 'connectedPeers':
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self.printOnlinePeers()
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elif cmd[0] == 'kex':
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for i in self.timers:
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if i.timerFunction.__name__ == 'lookupKeys':
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i.count = (i.frequency - 1)
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else:
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logger.info('Recieved daemonQueue command:' + cmd[0])
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self.decrementThreadCount('daemonCommands')
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def announce(self, peer):
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'''Announce to peers our address'''
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announceCount = 0
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announceAmount = 2
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for peer in self.onlinePeers:
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announceCount += 1
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if self.peerAction(peer, 'announce', self._core.hsAdder) == 'Success':
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logger.info('Successfully introduced node to ' + peer)
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break
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else:
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if announceCount == announceAmount:
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logger.warn('Could not introduce node. Try again soon')
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break
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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) != 'pong':
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for i in range(5):
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if self._core._utils.localCommand('ping') == 'pong':
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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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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 header(self, message = logger.colors.fg.pink + logger.colors.bold + 'Onionr' + logger.colors.reset + logger.colors.fg.pink + ' has started.'):
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if os.path.exists('static-data/header.txt'):
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with open('static-data/header.txt', 'rb') as file:
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# only to stdout, not file or log or anything
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sys.stderr.write(file.read().decode().replace('P', logger.colors.fg.pink).replace('W', logger.colors.reset + logger.colors.bold).replace('G', logger.colors.fg.green).replace('\n', logger.colors.reset + '\n').replace('B', logger.colors.bold).replace('V', onionr.ONIONR_VERSION))
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logger.info(logger.colors.fg.lightgreen + '-> ' + str(message) + logger.colors.reset + logger.colors.fg.lightgreen + ' <-\n')
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class OnionrCommunicatorTimers:
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def __init__(self, daemonInstance, timerFunction, frequency, makeThread=True, threadAmount=1, maxThreads=5, requiresPeer=False):
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self.timerFunction = timerFunction
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self.frequency = frequency
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self.threadAmount = threadAmount
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self.makeThread = makeThread
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self.requiresPeer = requiresPeer
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self.daemonInstance = daemonInstance
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self.maxThreads = maxThreads
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self._core = self.daemonInstance._core
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self.daemonInstance.timers.append(self)
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self.count = 0
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def processTimer(self):
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# mark how many instances of a thread we have (decremented at thread end)
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try:
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self.daemonInstance.threadCounts[self.timerFunction.__name__]
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except KeyError:
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self.daemonInstance.threadCounts[self.timerFunction.__name__] = 0
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# execute thread if it is time, and we are not missing *required* online peer
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if self.count == self.frequency:
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try:
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if self.requiresPeer and len(self.daemonInstance.onlinePeers) == 0:
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raise onionrexceptions.OnlinePeerNeeded
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except onionrexceptions.OnlinePeerNeeded:
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pass
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else:
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if self.makeThread:
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for i in range(self.threadAmount):
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if self.daemonInstance.threadCounts[self.timerFunction.__name__] >= self.maxThreads:
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logger.warn(self.timerFunction.__name__ + ' has too many current threads to start anymore.')
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else:
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self.daemonInstance.threadCounts[self.timerFunction.__name__] += 1
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newThread = threading.Thread(target=self.timerFunction)
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newThread.start()
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else:
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self.timerFunction()
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self.count = -1 # negative 1 because its incremented at bottom
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self.count += 1
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shouldRun = False
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debug = True
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developmentMode = False
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if config.get('general.dev_mode', True):
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developmentMode = True
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try:
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if sys.argv[1] == 'run':
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shouldRun = True
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except IndexError:
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pass
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if shouldRun:
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try:
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OnionrCommunicatorDaemon(debug, developmentMode)
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except Exception as e:
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logger.error('Error occured in Communicator', error = e, timestamp = False)
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