Onionr/src/communicatorutils/announcenode.py

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'''
Onionr - Private P2P Communication
Use a communicator instance to announce our transport address to connected nodes
'''
'''
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 <https://www.gnu.org/licenses/>.
'''
import base64
import onionrproofs, logger
from etc import onionrvalues
from onionrutils import basicrequests, bytesconverter
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from utils import gettransports
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from netcontroller import NetController
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from communicator import onlinepeers
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from coredb import keydb
import onionrexceptions
def announce_node(daemon):
'''Announce our node to our peers'''
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ret_data = False
announce_fail = False
# Do not let announceCache get too large
if len(daemon.announceCache) >= 10000:
daemon.announceCache.popitem()
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if daemon.config.get('general.security_level', 0) == 0:
# Announce to random online peers
for i in daemon.onlinePeers:
if not i in daemon.announceCache and not i in daemon.announceProgress:
peer = i
break
else:
try:
peer = onlinepeers.pick_online_peer(daemon)
except onionrexceptions.OnlinePeerNeeded:
peer = ""
for _ in range(1):
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try:
ourID = gettransports.get()[0]
if not peer:
raise onionrexceptions.OnlinePeerNeeded
except (IndexError, onionrexceptions.OnlinePeerNeeded):
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break
url = 'http://' + peer + '/announce'
data = {'node': ourID}
combinedNodes = ourID + peer
if ourID != 1:
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existingRand = bytesconverter.bytes_to_str(keydb.transportinfo.get_address_info(peer, 'powValue'))
# Reset existingRand if it no longer meets the minimum POW
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if type(existingRand) is type(None) or not existingRand.endswith('0' * onionrvalues.ANNOUNCE_POW):
existingRand = ''
if peer in daemon.announceCache:
data['random'] = daemon.announceCache[peer]
elif len(existingRand) > 0:
data['random'] = existingRand
else:
daemon.announceProgress[peer] = True
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proof = onionrproofs.DataPOW(combinedNodes, minDifficulty=onionrvalues.ANNOUNCE_POW)
del daemon.announceProgress[peer]
try:
data['random'] = base64.b64encode(proof.waitForResult()[1])
except TypeError:
# Happens when we failed to produce a proof
logger.error("Failed to produce a pow for announcing to " + peer)
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announce_fail = True
else:
daemon.announceCache[peer] = data['random']
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if not announce_fail:
logger.info('Announcing node to ' + url)
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if basicrequests.do_post_request(url, data, port=daemon.shared_state.get(NetController).socksPort) == 'Success':
logger.info('Successfully introduced node to ' + peer, terminal=True)
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ret_data = True
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keydb.transportinfo.set_address_info(peer, 'introduced', 1)
keydb.transportinfo.set_address_info(peer, 'powValue', data['random'])
daemon.decrementThreadCount('announce_node')
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return ret_data