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#!/usr/bin/env python3
#
# IDC to IRC proxy (based off an old miniirc proxy)
#
# © 2022 by luk3yx
#
import miniirc, miniirc_idc, os, socket, threading, traceback
from concurrent.futures import ThreadPoolExecutor
from miniirc_extras.utils import ircv2_message_unparser, ircv3_message_parser
# A single network
class Proxy:
_buffer = b''
IRC = miniirc_idc.IDC
encoding = 'utf-8'
_001 = False
_main_lock = False
block_incoming = frozenset(('PING', 'CAP', 'AUTHENTICATE'))
block_outgoing = frozenset(('CAP',))
# Send messages
def send(self, cmd, hostmask, tags, args):
raw = ircv2_message_unparser(cmd, hostmask or (cmd, cmd, cmd), tags,
args, colon=False, encoding=self.encoding)
self.sock.sendall(raw[:510] + b'\r\n')
# Receive messages
def recv(self):
while True:
while b'\n' not in self._buffer:
buf = self.sock.recv(4096)
assert buf, 'The socket has been closed!'
self._buffer += buf.replace(b'\r', b'\n')
msg, self._buffer = self._buffer.split(b'\n', 1)
msg = msg.decode(self.encoding, 'replace')
if msg:
cmd, _, tags, args = ircv3_message_parser(msg, colon=False)
return tags, cmd.upper(), args
# Handle everything
def _miniirc_handler(self, irc, cmd, hostmask, tags, args):
if cmd.startswith('IRCV3 ') or cmd in self.block_incoming:
return
elif cmd == '001':
if self._001:
return
self._001 = True
# Clear the SendQ
if self._sendq:
while len(self._sendq) > 0:
self._sendcmd(*self._sendq.pop(0))
# Start the main loop
self._main()
elif cmd == 'ERROR':
self.send('PING', None, {}, [':ERROR'])
elif cmd == 'PONG' and args and args[-1] == 'miniirc-ping':
return
# Send the command to the client
try:
self.send(cmd, hostmask, tags, args)
except Exception as e:
traceback.print_exc()
self.irc.disconnect('Connection closed.', auto_reconnect=False)
# The initial main loop
def _init_thread(self):
self._sendq = []
nick = None
user = None
# Wait for NICK and USER to be sent
while not nick or not user:
tags, cmd, args = self.recv()
if cmd == 'NICK' and len(args) == 1:
nick = args[0]
elif cmd == 'USER' and len(args) > 1:
user = args
else:
self._sendq.append((tags, cmd, args))
# Set values
self.irc.nick = nick
self.irc.ident = user[0]
self.irc.realname = user[-1]
# Connect
self.irc.connect()
# Send a command
def _sendcmd(self, tags, cmd, args):
if cmd not in self.block_outgoing:
raw = ircv2_message_unparser(cmd, (cmd, cmd, cmd), {}, args,
colon=False, encoding=None)
self.irc.quote(raw, tags=tags)
# The more permanent main loop
def _main(self, single_thread=False):
if not single_thread:
if self._main_lock and self._main_lock.is_alive():
return self._main_lock
t = threading.Thread(target=self._main, args=(True,))
t.start()
return t
# Clear the RecvQ
if self._recvq:
while len(self._recvq) > 0:
self.send(*self._recvq.pop(0))
self._recvq = None
# Send everything to IRC
while True:
try:
tags, cmd, args = self.recv()
except Exception as e:
print(repr(e))
return self.irc.disconnect()
self._sendcmd(tags, cmd, args)
# Generic init function
def _init(self, conn, irc):
self.sock = conn
self.irc = irc
# Add the IRC handler
self._recvq = []
self.irc.CmdHandler(ircv3=True, colon=False)(self._miniirc_handler)
# Start the main loop
self.thread = threading.Thread(target=self._init_thread)
self.thread.start()
# Create the IRC object
def __init__(self, conn, *args, bad_cmds=None, **kwargs):
if bad_cmds is not None:
self.bad_cmds = bad_cmds
self._init(conn, self.IRC(*args, auto_connect=False,
executor=ThreadPoolExecutor(1), **kwargs))
# The proxy class
class Server:
Proxy = Proxy
def __init__(self, *args, local_addr, **kwargs):
self.addr = local_addr
self.args, self.kwargs = args, kwargs
def main(self):
# Create a socket object
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.bind(self.addr)
sock.listen(1)
conn, _ = sock.accept()
with conn:
net = self.Proxy(conn, *self.args, **self.kwargs)
net.thread.join()
net.irc.wait_until_disconnected()
def main():
import argparse
parser = argparse.ArgumentParser()
parser.add_argument('local_port', type=int)
parser.add_argument('username')
parser.add_argument('password')
args = parser.parse_args()
Server('andrewyu.org', 6835, '', ssl=True, persist=False,
local_addr=('127.0.0.1', args.local_port),
ns_identity=(args.username, args.password)).main()
if __name__ == '__main__':
main()
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