109 lines
4.6 KiB
Python
109 lines
4.6 KiB
Python
from modules.nfregex.models import Service
|
|
from utils import ip_parse, ip_family, NFTableManager, nftables_int_to_json
|
|
|
|
class FiregexFilter:
|
|
def __init__(self, proto:str, port:int, ip_int:str, target:str, id:int):
|
|
self.id = id
|
|
self.target = target
|
|
self.proto = proto
|
|
self.port = int(port)
|
|
self.ip_int = str(ip_int)
|
|
|
|
def __eq__(self, o: object) -> bool:
|
|
if isinstance(o, FiregexFilter) or isinstance(o, Service):
|
|
return self.port == o.port and self.proto == o.proto and ip_parse(self.ip_int) == ip_parse(o.ip_int)
|
|
return False
|
|
|
|
class FiregexTables(NFTableManager):
|
|
input_chain = "nfregex_input"
|
|
output_chain = "nfregex_output"
|
|
|
|
def __init__(self):
|
|
super().__init__([
|
|
{"add":{"chain":{
|
|
"family":"inet",
|
|
"table":self.table_name,
|
|
"name":self.input_chain,
|
|
"type":"filter",
|
|
"hook":"prerouting",
|
|
"prio":-301,
|
|
"policy":"accept"
|
|
}}},
|
|
{"add":{"chain":{
|
|
"family":"inet",
|
|
"table":self.table_name,
|
|
"name":self.output_chain,
|
|
"type":"filter",
|
|
"hook":"postrouting",
|
|
"prio":-301,
|
|
"policy":"accept"
|
|
}}}
|
|
],[
|
|
{"flush":{"chain":{"table":self.table_name,"family":"inet", "name":self.input_chain}}},
|
|
{"delete":{"chain":{"table":self.table_name,"family":"inet", "name":self.input_chain}}},
|
|
{"flush":{"chain":{"table":self.table_name,"family":"inet", "name":self.output_chain}}},
|
|
{"delete":{"chain":{"table":self.table_name,"family":"inet", "name":self.output_chain}}},
|
|
])
|
|
|
|
def add(self, srv:Service, queue_range):
|
|
|
|
for ele in self.get():
|
|
if ele.__eq__(srv):
|
|
return
|
|
|
|
init, end = queue_range
|
|
if init > end:
|
|
init, end = end, init
|
|
self.cmd(
|
|
{ "insert":{ "rule": {
|
|
"family": "inet",
|
|
"table": self.table_name,
|
|
"chain": self.output_chain,
|
|
"expr": [
|
|
{'match': {'left': {'payload': {'protocol': ip_family(srv.ip_int), 'field': 'saddr'}}, 'op': '==', 'right': nftables_int_to_json(srv.ip_int)}},
|
|
{'match': {"left": { "payload": {"protocol": str(srv.proto), "field": "sport"}}, "op": "==", "right": int(srv.port)}},
|
|
{"mangle": {"key": {"meta": {"key": "mark"}},"value": 0x1338}},
|
|
{"queue": {"num": str(init) if init == end else {"range":[init, end] }, "flags": ["bypass"]}}
|
|
]
|
|
}}},
|
|
{"insert":{"rule":{
|
|
"family": "inet",
|
|
"table": self.table_name,
|
|
"chain": self.input_chain,
|
|
"expr": [
|
|
{'match': {'left': {'payload': {'protocol': ip_family(srv.ip_int), 'field': 'daddr'}}, 'op': '==', 'right': nftables_int_to_json(srv.ip_int)}},
|
|
{'match': {"left": { "payload": {"protocol": str(srv.proto), "field": "dport"}}, "op": "==", "right": int(srv.port)}},
|
|
{"mangle": {"key": {"meta": {"key": "mark"}},"value": 0x1337}},
|
|
{"queue": {"num": str(init) if init == end else {"range":[init, end] }, "flags": ["bypass"]}}
|
|
]
|
|
}}}
|
|
)
|
|
|
|
|
|
def get(self) -> list[FiregexFilter]:
|
|
res = []
|
|
for filter in self.list_rules(tables=[self.table_name], chains=[self.input_chain,self.output_chain]):
|
|
ip_int = None
|
|
if isinstance(filter["expr"][0]["match"]["right"],str):
|
|
ip_int = str(ip_parse(filter["expr"][0]["match"]["right"]))
|
|
else:
|
|
ip_int = f'{filter["expr"][0]["match"]["right"]["prefix"]["addr"]}/{filter["expr"][0]["match"]["right"]["prefix"]["len"]}'
|
|
res.append(FiregexFilter(
|
|
target=filter["chain"],
|
|
id=int(filter["handle"]),
|
|
proto=filter["expr"][1]["match"]["left"]["payload"]["protocol"],
|
|
port=filter["expr"][1]["match"]["right"],
|
|
ip_int=ip_int
|
|
))
|
|
return res
|
|
|
|
def delete(self, srv:Service):
|
|
for filter in self.get():
|
|
if filter.__eq__(srv):
|
|
self.cmd({ "delete":{ "rule": {
|
|
"family": "inet",
|
|
"table": self.table_name,
|
|
"chain": filter.target,
|
|
"handle": filter.id
|
|
}}})
|
|
|