150 lines
5.7 KiB
Python
150 lines
5.7 KiB
Python
import asyncio
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import traceback
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from time import time
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from typing import TYPE_CHECKING
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from typing import Set, Tuple
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from threading import Thread
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from onionrblocks import Block
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from gossip import constants
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from ..connectpeer import connect_peer
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from onionrplugins import onionrevents
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from logger import log as logging
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if TYPE_CHECKING:
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from onionrblocks import Block
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from peer import Peer
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from ordered_set import OrderedSet
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from asyncio import StreamReader, StreamWriter
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from filepaths import gossip_server_socket_file
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import blockdb
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from blockdb import add_block_to_db
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from ..commands import GossipCommands
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from ..peerset import gossip_peer_set
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from .acceptstem import accept_stem_blocks
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from .diffuseblocks import diffuse_blocks
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from .import lastincoming
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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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inbound_dandelion_edge_count = [0]
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def gossip_server():
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async def peer_connected(
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reader: 'StreamReader', writer: 'StreamWriter'):
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while True:
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try:
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cmd = await asyncio.wait_for(reader.readexactly(1), 60)
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except asyncio.exceptions.CancelledError:
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break
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except asyncio.IncompleteReadError:
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break
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lastincoming.last_incoming_timestamp = int(time())
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cmd = int.from_bytes(cmd, 'big')
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if cmd == b'' or cmd == 0:
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continue
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match GossipCommands(cmd):
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case GossipCommands.PING:
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writer.write(b'PONG')
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case GossipCommands.ANNOUNCE:
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async def _read_announce():
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address = await reader.readuntil(b'\n')
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if address:
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onionrevents.event(
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'announce_rec',
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data={'address': address,
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'callback': connect_peer},
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threaded=True)
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writer.write(int(1).to_bytes(1, 'big'))
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await writer.drain()
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await asyncio.wait_for(_read_announce(), 30)
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case GossipCommands.PEER_EXCHANGE:
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for peer in gossip_peer_set:
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writer.write(peer.transport_address.encode('utf-8') + b'\n')
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await writer.drain()
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case GossipCommands.STREAM_BLOCKS:
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try:
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await diffuse_blocks(reader, writer)
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except Exception:
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logging.debug(
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f"Err streaming blocks\n{traceback.format_exc()}",
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)
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case GossipCommands.PUT_BLOCKS:
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# Pick block queue & append stemmed blocks to it
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try:
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await accept_stem_blocks(
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reader, writer,
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inbound_dandelion_edge_count)
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except asyncio.exceptions.TimeoutError:
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pass
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logging.debug(
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"Inbound edge timed out when steming blocks to us",
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)
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except asyncio.exceptions.IncompleteReadError:
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pass
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logging.debug(
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"Inbound edge timed out (Incomplete Read) when steming blocks to us",
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)
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except Exception:
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logging.warn(
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f"Err accepting stem blocks\n{traceback.format_exc()}",
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)
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# Subtract dandelion edge, make sure >=0
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inbound_dandelion_edge_count[0] = \
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max(inbound_dandelion_edge_count[0] - 1, 0)
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case GossipCommands.PUT_BLOCK_DIFFUSE:
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async def _get_block_diffused():
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block_id = await reader.readexactly(constants.BLOCK_ID_SIZE)
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if blockdb.has_block(block_id):
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writer.write(int(0).to_bytes(1, 'big'))
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else:
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writer.write(int(1).to_bytes(1, 'big'))
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await writer.drain()
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block_size = int(await asyncio.wait_for(reader.readexactly(constants.BLOCK_SIZE_LEN), 30))
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block_data = await reader.readexactly(block_size)
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Thread(
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target=add_block_to_db,
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args=[
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Block(block_id, block_data, auto_verify=True)]
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).start()
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await _get_block_diffused()
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break
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try:
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await writer.drain()
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except BrokenPipeError:
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pass
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writer.close()
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async def main():
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server = await asyncio.start_unix_server(
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peer_connected, gossip_server_socket_file
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)
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async with server:
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await server.serve_forever()
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asyncio.run(main())
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