113 lines
4.7 KiB
Python
113 lines
4.7 KiB
Python
from typing import List
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from modules.nfregex.models import Service
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from utils import ip_parse, ip_family, NFTableManager
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class FiregexFilter:
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def __init__(self, proto:str, port:int, ip_int:str, target:str, id:int):
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self.id = id
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self.target = target
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self.proto = proto
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self.port = int(port)
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self.ip_int = str(ip_int)
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def __eq__(self, o: object) -> bool:
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if isinstance(o, FiregexFilter):
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return self.port == o.port and self.proto == o.proto and ip_parse(self.ip_int) == ip_parse(o.ip_int)
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elif isinstance(o, Service):
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return self.port == o.port and self.proto == o.proto and ip_parse(self.ip_int) == ip_parse(o.ip_int)
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return False
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class FiregexTables(NFTableManager):
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input_chain = "nfregex_input"
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output_chain = "nfregex_output"
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def __init__(self):
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super().__init__([
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{"add":{"chain":{
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"family":"inet",
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"table":self.table_name,
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"name":self.input_chain,
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"type":"filter",
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"hook":"prerouting",
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"prio":-150,
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"policy":"accept"
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}}},
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{"add":{"chain":{
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"family":"inet",
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"table":self.table_name,
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"name":self.output_chain,
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"type":"filter",
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"hook":"postrouting",
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"prio":-150,
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"policy":"accept"
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}}}
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],[
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{"flush":{"chain":{"table":self.table_name,"family":"inet", "name":self.input_chain}}},
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{"delete":{"chain":{"table":self.table_name,"family":"inet", "name":self.input_chain}}},
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{"flush":{"chain":{"table":self.table_name,"family":"inet", "name":self.output_chain}}},
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{"delete":{"chain":{"table":self.table_name,"family":"inet", "name":self.output_chain}}},
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])
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def add(self, srv:Service, queue_range_input, queue_range_output):
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for ele in self.get():
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if ele.__eq__(srv): return
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ip_int = ip_parse(srv.ip_int)
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ip_addr = str(ip_int).split("/")[0]
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ip_addr_cidr = int(str(ip_int).split("/")[1])
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init, end = queue_range_output
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if init > end: init, end = end, init
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self.cmd({ "insert":{ "rule": {
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"family": "inet",
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"table": self.table_name,
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"chain": self.output_chain,
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"expr": [
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{'match': {'left': {'payload': {'protocol': ip_family(ip_int), 'field': 'saddr'}}, 'op': '==', 'right': {"prefix": {"addr": ip_addr, "len": ip_addr_cidr}}}},
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{'match': {"left": { "payload": {"protocol": str(srv.proto), "field": "sport"}}, "op": "==", "right": int(srv.port)}},
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{"queue": {"num": str(init) if init == end else {"range":[init, end] }, "flags": ["bypass"]}}
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]
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}}})
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init, end = queue_range_input
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if init > end: init, end = end, init
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self.cmd({"insert":{"rule":{
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"family": "inet",
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"table": self.table_name,
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"chain": self.input_chain,
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"expr": [
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{'match': {'left': {'payload': {'protocol': ip_family(ip_int), 'field': 'daddr'}}, 'op': '==', 'right': {"prefix": {"addr": ip_addr, "len": ip_addr_cidr}}}},
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{'match': {"left": { "payload": {"protocol": str(srv.proto), "field": "dport"}}, "op": "==", "right": int(srv.port)}},
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{"queue": {"num": str(init) if init == end else {"range":[init, end] }, "flags": ["bypass"]}}
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]
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}}})
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def get(self) -> List[FiregexFilter]:
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res = []
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for filter in self.list_rules(tables=[self.table_name], chains=[self.input_chain,self.output_chain]):
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ip_int = None
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if isinstance(filter["expr"][0]["match"]["right"],str):
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ip_int = str(ip_parse(filter["expr"][0]["match"]["right"]))
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else:
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ip_int = f'{filter["expr"][0]["match"]["right"]["prefix"]["addr"]}/{filter["expr"][0]["match"]["right"]["prefix"]["len"]}'
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res.append(FiregexFilter(
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target=filter["chain"],
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id=int(filter["handle"]),
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proto=filter["expr"][1]["match"]["left"]["payload"]["protocol"],
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port=filter["expr"][1]["match"]["right"],
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ip_int=ip_int
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))
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return res
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def delete(self, srv:Service):
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for filter in self.get():
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if filter.__eq__(srv):
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self.cmd({ "delete":{ "rule": {
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"family": "inet",
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"table": self.table_name,
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"chain": filter.target,
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"handle": filter.id
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}}})
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