150 lines
5.2 KiB
Python
150 lines
5.2 KiB
Python
from modules.nfregex.nftables import FiregexTables
|
|
from utils import run_func
|
|
from modules.nfregex.models import Service, Regex
|
|
import re
|
|
import os
|
|
import asyncio
|
|
import traceback
|
|
from utils import DEBUG
|
|
|
|
nft = FiregexTables()
|
|
|
|
class RegexFilter:
|
|
def __init__(
|
|
self, regex,
|
|
is_case_sensitive=True,
|
|
input_mode=False,
|
|
output_mode=False,
|
|
blocked_packets=0,
|
|
id=None,
|
|
update_func = None
|
|
):
|
|
self.regex = regex
|
|
self.is_case_sensitive = is_case_sensitive
|
|
if input_mode == output_mode:
|
|
input_mode = output_mode = True # (False, False) == (True, True)
|
|
self.input_mode = input_mode
|
|
self.output_mode = output_mode
|
|
self.blocked = blocked_packets
|
|
self.id = id
|
|
self.update_func = update_func
|
|
self.compiled_regex = self.compile()
|
|
|
|
@classmethod
|
|
def from_regex(cls, regex:Regex, update_func = None):
|
|
return cls(
|
|
id=regex.id, regex=regex.regex, is_case_sensitive=regex.is_case_sensitive,
|
|
blocked_packets=regex.blocked_packets,
|
|
input_mode = regex.mode in ["C","B"], output_mode=regex.mode in ["S","B"],
|
|
update_func = update_func
|
|
)
|
|
def compile(self):
|
|
if isinstance(self.regex, str):
|
|
self.regex = self.regex.encode()
|
|
if not isinstance(self.regex, bytes):
|
|
raise Exception("Invalid Regex Paramether")
|
|
re.compile(self.regex) # raise re.error if it's invalid!
|
|
case_sensitive = "1" if self.is_case_sensitive else "0"
|
|
if self.input_mode:
|
|
yield case_sensitive + "C" + self.regex.hex()
|
|
if self.output_mode:
|
|
yield case_sensitive + "S" + self.regex.hex()
|
|
|
|
async def update(self):
|
|
if self.update_func:
|
|
await run_func(self.update_func, self)
|
|
|
|
class FiregexInterceptor:
|
|
|
|
def __init__(self):
|
|
self.srv:Service
|
|
self.filter_map_lock:asyncio.Lock
|
|
self.filter_map: dict[str, RegexFilter]
|
|
self.regex_filters: set[RegexFilter]
|
|
self.update_config_lock:asyncio.Lock
|
|
self.process:asyncio.subprocess.Process
|
|
self.update_task: asyncio.Task
|
|
|
|
@classmethod
|
|
async def start(cls, srv: Service):
|
|
self = cls()
|
|
self.srv = srv
|
|
self.filter_map_lock = asyncio.Lock()
|
|
self.update_config_lock = asyncio.Lock()
|
|
queue_range = await self._start_binary()
|
|
self.update_task = asyncio.create_task(self.update_blocked())
|
|
nft.add(self.srv, queue_range)
|
|
return self
|
|
|
|
async def _start_binary(self):
|
|
proxy_binary_path = os.path.join(os.path.dirname(os.path.abspath(__file__)),"../cppqueue")
|
|
self.process = await asyncio.create_subprocess_exec(
|
|
proxy_binary_path,
|
|
stdout=asyncio.subprocess.PIPE, stdin=asyncio.subprocess.PIPE
|
|
)
|
|
line_fut = self.process.stdout.readuntil()
|
|
try:
|
|
line_fut = await asyncio.wait_for(line_fut, timeout=3)
|
|
except asyncio.TimeoutError:
|
|
self.process.kill()
|
|
raise Exception("Invalid binary output")
|
|
line = line_fut.decode()
|
|
if line.startswith("QUEUES "):
|
|
params = line.split()
|
|
return (int(params[1]), int(params[2]))
|
|
else:
|
|
self.process.kill()
|
|
raise Exception("Invalid binary output")
|
|
|
|
async def update_blocked(self):
|
|
try:
|
|
while True:
|
|
line = (await self.process.stdout.readuntil()).decode()
|
|
if DEBUG:
|
|
print(line)
|
|
if line.startswith("BLOCKED"):
|
|
regex_id = line.split()[1]
|
|
async with self.filter_map_lock:
|
|
if regex_id in self.filter_map:
|
|
self.filter_map[regex_id].blocked+=1
|
|
await self.filter_map[regex_id].update()
|
|
except asyncio.CancelledError:
|
|
pass
|
|
except asyncio.IncompleteReadError:
|
|
pass
|
|
except Exception:
|
|
traceback.print_exc()
|
|
|
|
async def stop(self):
|
|
self.update_task.cancel()
|
|
if self.process and self.process.returncode is None:
|
|
self.process.kill()
|
|
|
|
async def _update_config(self, filters_codes):
|
|
async with self.update_config_lock:
|
|
self.process.stdin.write((" ".join(filters_codes)+"\n").encode())
|
|
await self.process.stdin.drain()
|
|
|
|
async def reload(self, filters:list[RegexFilter]):
|
|
async with self.filter_map_lock:
|
|
self.filter_map = self.compile_filters(filters)
|
|
filters_codes = self.get_filter_codes()
|
|
await self._update_config(filters_codes)
|
|
|
|
def get_filter_codes(self):
|
|
filters_codes = list(self.filter_map.keys())
|
|
filters_codes.sort(key=lambda a: self.filter_map[a].blocked, reverse=True)
|
|
return filters_codes
|
|
|
|
def compile_filters(self, filters:list[RegexFilter]):
|
|
res = {}
|
|
for filter_obj in filters:
|
|
try:
|
|
raw_filters = filter_obj.compile()
|
|
for filter in raw_filters:
|
|
res[filter] = filter_obj
|
|
except Exception:
|
|
pass
|
|
return res
|
|
|