117 lines
3.9 KiB
Python
117 lines
3.9 KiB
Python
import asyncio
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from typing import Dict
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from modules.nfregex.firegex import FiregexInterceptor, RegexFilter
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from modules.nfregex.nftables import FiregexTables, FiregexFilter
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from modules.nfregex.models import Regex, Service
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from utils.sqlite import SQLite
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class STATUS:
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STOP = "stop"
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ACTIVE = "active"
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nft = FiregexTables()
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class FirewallManager:
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def __init__(self, db:SQLite):
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self.db = db
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self.service_table: Dict[str, ServiceManager] = {}
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self.lock = asyncio.Lock()
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async def close(self):
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for key in list(self.service_table.keys()):
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await self.remove(key)
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async def remove(self,srv_id):
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async with self.lock:
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if srv_id in self.service_table:
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await self.service_table[srv_id].next(STATUS.STOP)
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del self.service_table[srv_id]
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async def init(self):
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nft.init()
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await self.reload()
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async def reload(self):
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async with self.lock:
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for srv in self.db.query('SELECT * FROM services;'):
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srv = Service.from_dict(srv)
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if srv.id in self.service_table:
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continue
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self.service_table[srv.id] = ServiceManager(srv, self.db)
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await self.service_table[srv.id].next(srv.status)
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def get(self,srv_id):
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if srv_id in self.service_table:
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return self.service_table[srv_id]
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else:
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raise ServiceNotFoundException()
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class ServiceNotFoundException(Exception): pass
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class ServiceManager:
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def __init__(self, srv: Service, db):
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self.srv = srv
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self.db = db
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self.status = STATUS.STOP
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self.filters: Dict[int, FiregexFilter] = {}
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self.lock = asyncio.Lock()
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self.interceptor = None
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async def _update_filters_from_db(self):
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regexes = [
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Regex.from_dict(ele) for ele in
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self.db.query("SELECT * FROM regexes WHERE service_id = ? AND active=1;", self.srv.id)
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]
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#Filter check
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old_filters = set(self.filters.keys())
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new_filters = set([f.id for f in regexes])
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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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del self.filters[f]
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#add new filters
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for f in new_filters:
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if not f in old_filters:
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filter = [ele for ele in regexes if ele.id == f][0]
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self.filters[f] = RegexFilter.from_regex(filter, self._stats_updater)
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if self.interceptor: await self.interceptor.reload(self.filters.values())
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def __update_status_db(self, status):
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self.db.query("UPDATE services SET status = ? WHERE service_id = ?;", status, self.srv.id)
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async def next(self,to):
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async with self.lock:
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if (self.status, to) == (STATUS.ACTIVE, STATUS.STOP):
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await self.stop()
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self._set_status(to)
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# PAUSE -> ACTIVE
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elif (self.status, to) == (STATUS.STOP, STATUS.ACTIVE):
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await self.restart()
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def _stats_updater(self,filter:RegexFilter):
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self.db.query("UPDATE regexes SET blocked_packets = ? WHERE regex_id = ?;", filter.blocked, filter.id)
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def _set_status(self,status):
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self.status = status
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self.__update_status_db(status)
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async def start(self):
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if not self.interceptor:
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nft.delete(self.srv)
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self.interceptor = await FiregexInterceptor.start(self.srv)
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await self._update_filters_from_db()
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self._set_status(STATUS.ACTIVE)
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async def stop(self):
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nft.delete(self.srv)
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if self.interceptor:
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await self.interceptor.stop()
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self.interceptor = None
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async def restart(self):
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await self.stop()
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await self.start()
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async def update_filters(self):
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async with self.lock:
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await self._update_filters_from_db() |