43 lines
1.4 KiB
Python
43 lines
1.4 KiB
Python
"""
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Onionr - Private P2P Communication.
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pick online peers in a communicator instance
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"""
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import secrets
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import onionrexceptions
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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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def pick_online_peer(comm_inst):
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"""Randomly picks peer from pool without bias (using secrets module)."""
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ret_data = ''
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peer_length = len(comm_inst.onlinePeers)
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if peer_length <= 0:
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raise onionrexceptions.OnlinePeerNeeded
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while True:
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peer_length = len(comm_inst.onlinePeers)
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try:
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# Get a random online peer, securely.
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# May get stuck in loop if network is lost or if all peers in pool magically disconnect at once
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ret_data = comm_inst.onlinePeers[secrets.randbelow(peer_length)]
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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 ret_data |