298 lines
11 KiB
Python
Executable File
298 lines
11 KiB
Python
Executable File
from proxy import Filter, Proxy
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import random, string, os, threading, sqlite3, time, atexit, socket
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from kthread import KThread
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from base64 import b64decode
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LOCALHOST_IP = socket.gethostbyname(os.getenv("LOCALHOST_IP","127.0.0.1"))
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class SQLite():
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def __init__(self, db_name) -> None:
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self.conn = None
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self.cur = None
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self.db_name = db_name
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self.lock = threading.Lock()
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def connect(self) -> None:
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if not os.path.exists("db"): os.mkdir("db")
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try:
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self.conn = sqlite3.connect("db/" + self.db_name + '.db', check_same_thread = False)
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except Exception:
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with open("db/" + self.db_name + '.db', 'x'):
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pass
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self.conn = sqlite3.connect("db/" + self.db_name + '.db', check_same_thread = False)
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def dict_factory(cursor, row):
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d = {}
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for idx, col in enumerate(cursor.description):
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d[col[0]] = row[idx]
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return d
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self.conn.row_factory = dict_factory
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def disconnect(self) -> None:
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self.conn.close()
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def create_schema(self, tables = {}) -> None:
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cur = self.conn.cursor()
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for t in tables:
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cur.execute('''CREATE TABLE IF NOT EXISTS main.{}({});'''.format(t, ''.join([(c + ' ' + tables[t][c] + ', ') for c in tables[t]])[:-2]))
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cur.close()
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def query(self, query, *values):
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cur = self.conn.cursor()
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try:
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with self.lock:
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cur.execute(query, values)
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return cur.fetchall()
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finally:
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cur.close()
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try: self.conn.commit()
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except Exception: pass
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class KeyValueStorage:
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def __init__(self, db):
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self.db = db
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def get(self, key):
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q = self.db.query('SELECT value FROM keys_values WHERE key = ?', key)
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if len(q) == 0:
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return None
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else:
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return q[0]["value"]
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def put(self, key, value):
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if self.get(key) is None:
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self.db.query('INSERT INTO keys_values (key, value) VALUES (?, ?);', key, str(value))
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else:
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self.db.query('UPDATE keys_values SET value=? WHERE key = ?;', str(value), key)
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class STATUS:
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WAIT = "wait"
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STOP = "stop"
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PAUSE = "pause"
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ACTIVE = "active"
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class ProxyManager:
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def __init__(self, db:SQLite):
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self.db = db
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self.proxy_table = {}
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self.lock = threading.Lock()
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atexit.register(self.clear)
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def __clean_proxy_table(self):
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with self.lock:
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for key in list(self.proxy_table.keys()):
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if not self.proxy_table[key]["thread"].is_alive():
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del self.proxy_table[key]
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def clear(self):
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with self.lock:
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for key in list(self.proxy_table.keys()):
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if self.proxy_table[key]["thread"].is_alive():
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self.proxy_table[key]["thread"].kill()
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del self.proxy_table[key]
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def reload(self):
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self.__clean_proxy_table()
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with self.lock:
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for srv in self.db.query('SELECT service_id, status FROM services;'):
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srv_id, n_status = srv["service_id"], srv["status"]
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if srv_id in self.proxy_table:
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continue
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update_signal = threading.Event()
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callback_signal = threading.Event()
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req_status = [n_status]
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thread = KThread(target=self.service_manager, args=(srv_id, req_status, update_signal, callback_signal))
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self.proxy_table[srv_id] = {
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"thread":thread,
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"event":update_signal,
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"callback":callback_signal,
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"next_status":req_status
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}
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thread.start()
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callback_signal.wait()
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callback_signal.clear()
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def get_service_data(self, id):
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res = self.db.query("""
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SELECT
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service_id `id`,
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status,
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public_port,
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internal_port
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FROM services WHERE service_id = ?;
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""", id)
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if len(res) == 0: return None
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else: res = res[0]
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res["filters"] = self.db.query("""
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SELECT
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regex, mode, regex_id `id`, is_blacklist,
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blocked_packets n_packets, is_case_sensitive
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FROM regexes WHERE service_id = ?;
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""", id)
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return res
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def change_status(self, id, to):
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with self.lock:
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if id in self.proxy_table:
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if self.proxy_table[id]["thread"].is_alive():
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self.proxy_table[id]["next_status"][0] = to
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self.proxy_table[id]["event"].set()
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self.proxy_table[id]["callback"].wait()
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self.proxy_table[id]["callback"].clear()
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else:
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del self.proxy_table[id]
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def fire_update(self, id):
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with self.lock:
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if id in self.proxy_table:
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if self.proxy_table[id]["thread"].is_alive():
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self.proxy_table[id]["event"].set()
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self.proxy_table[id]["callback"].wait()
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self.proxy_table[id]["callback"].clear()
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else:
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del self.proxy_table[id]
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def __update_status_db(self, id, status):
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self.db.query("UPDATE services SET status = ? WHERE service_id = ?;", status, id)
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def __proxy_starter(self, id, proxy:Proxy, next_status):
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def func():
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while True:
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if check_port_is_open(proxy.public_port):
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self.__update_status_db(id, next_status)
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proxy.start(in_pause=(next_status==STATUS.PAUSE))
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self.__update_status_db(id, STATUS.STOP)
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return
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else:
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time.sleep(.5)
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thread = KThread(target=func)
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thread.start()
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return thread
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def service_manager(self, id, next_status, signal:threading.Event, callback):
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proxy = None
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thr_starter:KThread = None
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filters = {}
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while True:
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restart_required = False
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reload_required = False
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data = self.get_service_data(id)
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#Close thread
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if data is None:
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if proxy and proxy.isactive():
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proxy.stop()
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callback.set()
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return
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if data["status"] == STATUS.STOP:
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if thr_starter and thr_starter.is_alive(): thr_starter.kill()
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#Filter check
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old_filters = set(filters.keys())
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new_filters = set([f["id"] for f in data["filters"]])
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#remove old filters
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for f in old_filters:
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if not f in new_filters:
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reload_required = True
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del filters[f]
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for f in new_filters:
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if not f in old_filters:
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reload_required = True
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filter_info = [ele for ele in data['filters'] if ele["id"] == f][0]
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filters[f] = Filter(
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is_case_sensitive=filter_info["is_case_sensitive"],
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c_to_s=filter_info["mode"] in ["C","B"],
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s_to_c=filter_info["mode"] in ["S","B"],
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is_blacklist=filter_info["is_blacklist"],
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regex=b64decode(filter_info["regex"]),
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blocked_packets=filter_info["n_packets"],
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code=f
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)
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def stats_updater(filter:Filter):
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self.db.query("UPDATE regexes SET blocked_packets = ? WHERE regex_id = ?;", filter.blocked, filter.code)
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if not proxy:
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proxy = Proxy(
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internal_port=data['internal_port'],
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public_port=data['public_port'],
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filters=list(filters.values()),
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internal_host=LOCALHOST_IP,
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callback_blocked_update=stats_updater
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)
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#Port checks
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if proxy.internal_port != data['internal_port'] or proxy.public_port != data['public_port']:
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proxy.internal_port = data['internal_port']
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proxy.public_port = data['public_port']
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restart_required = True
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#Update filters
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if reload_required:
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proxy.filters = list(filters.values())
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#proxy status managment
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if data["status"] != next_status[0]:
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# ACTIVE -> PAUSE or PAUSE -> ACTIVE
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if (data["status"], next_status[0]) in [(STATUS.ACTIVE, STATUS.PAUSE), (STATUS.PAUSE, STATUS.ACTIVE)]:
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if restart_required:
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proxy.restart(in_pause=next_status[0])
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else:
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if next_status[0] == STATUS.ACTIVE: proxy.reload()
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else: proxy.pause()
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self.__update_status_db(id, next_status[0])
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reload_required = restart_required = False
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# ACTIVE -> STOP
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elif (data["status"],next_status[0]) in [(STATUS.ACTIVE, STATUS.STOP), (STATUS.WAIT, STATUS.STOP), (STATUS.PAUSE, STATUS.STOP)]: #Stop proxy
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if thr_starter and thr_starter.is_alive(): thr_starter.kill()
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proxy.stop()
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next_status[0] = STATUS.STOP
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self.__update_status_db(id, STATUS.STOP)
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reload_required = restart_required = False
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# STOP -> ACTIVE or STOP -> PAUSE
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elif (data["status"], next_status[0]) in [(STATUS.STOP, STATUS.ACTIVE), (STATUS.STOP, STATUS.PAUSE)]:
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self.__update_status_db(id, STATUS.WAIT)
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thr_starter = self.__proxy_starter(id, proxy, next_status[0])
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reload_required = restart_required = False
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if data["status"] != STATUS.STOP:
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if restart_required: proxy.restart(in_pause=(data["status"] == STATUS.PAUSE))
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elif reload_required and data["status"] != STATUS.PAUSE: proxy.reload()
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callback.set()
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signal.wait()
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signal.clear()
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def check_port_is_open(port):
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try:
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sock = socket.socket()
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sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
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sock.bind(('0.0.0.0',port))
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sock.close()
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return True
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except Exception:
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return False
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def from_name_get_id(name):
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serv_id = name.strip().replace(" ","-")
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serv_id = "".join([c for c in serv_id if c in (string.ascii_uppercase + string.ascii_lowercase + string.digits + "-")])
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return serv_id.lower()
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def gen_internal_port(db):
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while True:
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res = random.randint(30000, 45000)
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if len(db.query('SELECT 1 FROM services WHERE internal_port = ?;', res)) == 0:
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break
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return res
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