129 lines
5.2 KiB
Python
Executable File
129 lines
5.2 KiB
Python
Executable File
from signal import SIGUSR1, SIGUSR2
|
|
from secrets import token_urlsafe
|
|
from kthread import KThread
|
|
import re, os
|
|
from ctypes import CDLL, POINTER, c_char_p, c_int, c_ushort, CFUNCTYPE, c_void_p, byref
|
|
|
|
#c++ -o proxy proxy.cpp
|
|
|
|
class Filter:
|
|
def __init__(self, regex, is_case_sensitive=True, is_blacklist=True, c_to_s=False, s_to_c=False, blocked_packets=0, code=None):
|
|
self.regex = regex
|
|
self.is_case_sensitive = is_case_sensitive
|
|
self.is_blacklist = is_blacklist
|
|
if c_to_s == s_to_c: c_to_s = s_to_c = True # (False, False) == (True, True)
|
|
self.c_to_s = c_to_s
|
|
self.s_to_c = s_to_c
|
|
self.blocked = blocked_packets
|
|
self.code = code
|
|
|
|
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 is invalid!
|
|
case_sensitive = "1" if self.is_case_sensitive else "0"
|
|
if self.c_to_s:
|
|
yield case_sensitive + "C" + self.regex.hex() if self.is_blacklist else case_sensitive + "c"+ self.regex.hex()
|
|
if self.s_to_c:
|
|
yield case_sensitive + "S" + self.regex.hex() if self.is_blacklist else case_sensitive + "s"+ self.regex.hex()
|
|
|
|
class Proxy:
|
|
def __init__(self, internal_port, public_port, callback_blocked_update=None, filters=None, public_host="0.0.0.0", internal_host="127.0.0.1"):
|
|
self.public_host = public_host
|
|
self.public_port = public_port
|
|
self.internal_host = internal_host
|
|
self.internal_port = internal_port
|
|
self.filters = set(filters) if filters else set([])
|
|
self.process = None
|
|
self.callback_blocked_update = callback_blocked_update
|
|
self.config_file_path = None
|
|
while self.config_file_path is None:
|
|
config_file_path = os.path.join("/tmp/" + token_urlsafe(16))
|
|
if not os.path.exists(config_file_path):
|
|
self.config_file_path = config_file_path
|
|
self.lib = CDLL(os.path.join(os.path.dirname(os.path.abspath(__file__)),"./proxy.so"))
|
|
self.lib.start_proxy.restype = c_int
|
|
#char* local_host_p, unsigned short local_port, char* forward_host_p, unsigned short forward_port, char* config_file_p, void (*incrementCallback_p)(const char *)
|
|
self.lib.start_proxy.argtypes = [c_char_p, c_ushort, c_char_p, c_ushort, c_char_p, POINTER(c_int), c_void_p]
|
|
|
|
|
|
def start(self, in_pause=False):
|
|
if self.process is None:
|
|
self.filter_map = self.compile_filters()
|
|
filters_codes = list(self.filter_map.keys()) if not in_pause else []
|
|
self.__write_config(filters_codes)
|
|
|
|
@CFUNCTYPE(None, c_char_p)
|
|
def callback_wrap(regex):
|
|
filter = self.filter_map[regex.decode()]
|
|
filter.blocked+=1
|
|
print(self.filter_map)
|
|
if self.callback_blocked_update:
|
|
self.callback_blocked_update(self.filter_map[regex.decode()])
|
|
|
|
status_code = c_int(1)
|
|
self.process = KThread(
|
|
target=self.lib.start_proxy,
|
|
args=(self.public_host.encode(), self.public_port,
|
|
self.internal_host.encode(), self.internal_port,
|
|
self.config_file_path.encode(),
|
|
byref(status_code), callback_wrap
|
|
),
|
|
)
|
|
self.process.start()
|
|
self.process.join()
|
|
self.__delete_config()
|
|
return status_code.value
|
|
|
|
def stop(self):
|
|
if self.process:
|
|
if self.process.is_alive():
|
|
os.kill(self.process.native_id,SIGUSR2)
|
|
self.process = None
|
|
return True
|
|
|
|
def restart(self, in_pause=False):
|
|
status = self.stop()
|
|
self.start(in_pause=in_pause)
|
|
return status
|
|
|
|
def __write_config(self, filters_codes):
|
|
with open(self.config_file_path,'w') as config_file:
|
|
for line in filters_codes:
|
|
config_file.write(line + '\n')
|
|
|
|
def __delete_config(self):
|
|
os.remove(self.config_file_path)
|
|
|
|
def reload(self):
|
|
if self.isactive():
|
|
filter_map = self.compile_filters()
|
|
filters_codes = list(filter_map.keys())
|
|
self.__write_config(filters_codes)
|
|
self.trigger_reload_config()
|
|
|
|
def isactive(self):
|
|
if self.process and not self.process.is_alive():
|
|
self.process = None
|
|
return not self.process is None
|
|
|
|
def trigger_reload_config(self):
|
|
os.kill(self.process.native_id, SIGUSR1)
|
|
|
|
def pause(self):
|
|
if self.isactive():
|
|
self.__write_config([])
|
|
self.trigger_reload_config()
|
|
else:
|
|
self.start(in_pause=True)
|
|
|
|
def compile_filters(self):
|
|
res = {}
|
|
for filter_obj in self.filters:
|
|
try:
|
|
raw_filters = filter_obj.compile()
|
|
for filter in raw_filters:
|
|
res[filter] = filter_obj
|
|
except Exception: pass
|
|
return res
|