172 lines
6.3 KiB
Python
172 lines
6.3 KiB
Python
import sqlite3
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from fastapi import APIRouter, HTTPException
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from pydantic import BaseModel
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from utils.sqlite import SQLite
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from utils import ip_parse, ip_family, refactor_name, refresh_frontend, PortType
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from utils.models import ResetRequest, StatusMessageModel
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from modules.firewall.nftables import FiregexTables
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from modules.firewall.firewall import FirewallManager
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class RuleModel(BaseModel):
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active: bool
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name: str
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proto: str
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ip_src: str
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ip_dst: str
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port_src_from: PortType
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port_dst_from: PortType
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port_src_to: PortType
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port_dst_to: PortType
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action: str
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mode:str
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class RuleAddResponse(BaseModel):
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status:str|list[dict]
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class RenameForm(BaseModel):
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name:str
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class GeneralStatModel(BaseModel):
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rules: int
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app = APIRouter()
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db = SQLite('db/firewall-rules.db', {
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'rules': {
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'rule_id': 'INT PRIMARY KEY CHECK (rule_id >= 0)',
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'mode': 'VARCHAR(1) NOT NULL CHECK (mode IN ("O", "I"))', # O = out, I = in, B = both
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'name': 'VARCHAR(100) NOT NULL',
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'active' : 'BOOLEAN NOT NULL CHECK (active IN (0, 1))',
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'proto': 'VARCHAR(3) NOT NULL CHECK (proto IN ("tcp", "udp", "any"))',
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'ip_src': 'VARCHAR(100) NOT NULL',
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'port_src_from': 'INT CHECK(port_src_from > 0 and port_src_from < 65536)',
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'port_src_to': 'INT CHECK(port_src_to > 0 and port_src_to < 65536 and port_src_from <= port_src_to)',
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'ip_dst': 'VARCHAR(100) NOT NULL',
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'port_dst_from': 'INT CHECK(port_dst_from > 0 and port_dst_from < 65536)',
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'port_dst_to': 'INT CHECK(port_dst_to > 0 and port_dst_to < 65536 and port_dst_from <= port_dst_to)',
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'action': 'VARCHAR(10) NOT NULL CHECK (action IN ("accept", "drop", "reject"))',
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},
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'QUERY':[
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"CREATE UNIQUE INDEX IF NOT EXISTS unique_rules ON rules (proto, ip_src, ip_dst, port_src_from, port_src_to, port_dst_from, port_dst_to, action, mode);"
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]
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})
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async def reset(params: ResetRequest):
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if not params.delete:
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db.backup()
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await firewall.close()
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FiregexTables().reset()
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if params.delete:
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db.delete()
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db.init()
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else:
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db.restore()
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await firewall.init()
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async def startup():
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db.init()
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await firewall.init()
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async def shutdown():
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db.backup()
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await firewall.close()
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db.disconnect()
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db.restore()
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async def apply_changes():
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await firewall.reload()
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await refresh_frontend()
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return {'status': 'ok'}
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firewall = FirewallManager(db)
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@app.get('/stats', response_model=GeneralStatModel)
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async def get_general_stats():
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"""Get firegex general status about rules"""
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return db.query("SELECT (SELECT COUNT(*) FROM rules) rules")[0]
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@app.get('/rules', response_model=list[RuleModel])
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async def get_rule_list():
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"""Get the list of existent firegex rules"""
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return db.query("SELECT active, name, proto, ip_src, ip_dst, port_src_from, port_dst_from, port_src_to, port_dst_to, action, mode FROM rules ORDER BY rule_id;")
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@app.get('/rule/{rule_id}/disable', response_model=StatusMessageModel)
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async def service_disable(rule_id: str):
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"""Request disabling a specific rule"""
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if len(db.query('SELECT 1 FROM rules WHERE rule_id = ?;', rule_id)) == 0:
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return {'status': 'Rule not found'}
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db.query('UPDATE rules SET active = 0 WHERE rule_id = ?;', rule_id)
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return await apply_changes()
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@app.get('/rule/{rule_id}/enable', response_model=StatusMessageModel)
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async def service_start(rule_id: str):
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"""Request the enabling a specific rule"""
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if len(db.query('SELECT 1 FROM rules WHERE rule_id = ?;', rule_id)) == 0:
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return {'status': 'Rule not found'}
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db.query('UPDATE rules SET active = 1 WHERE rule_id = ?;', rule_id)
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return await apply_changes()
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@app.post('/service/{rule_id}/rename', response_model=StatusMessageModel)
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async def service_rename(rule_id: str, form: RenameForm):
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"""Request to change the name of a specific service"""
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if len(db.query('SELECT 1 FROM rules WHERE rule_id = ?;', rule_id)) == 0:
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return {'status': 'Rule not found'}
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form.name = refactor_name(form.name)
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if not form.name: return {'status': 'The name cannot be empty!'}
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try:
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db.query('UPDATE rules SET name=? WHERE rule_id = ?;', form.name, rule_id)
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except sqlite3.IntegrityError:
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return {'status': 'This name is already used'}
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await refresh_frontend()
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return {'status': 'ok'}
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def parse_and_check_rule(rule:RuleModel):
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try:
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rule.ip_src = ip_parse(rule.ip_src)
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rule.ip_dst = ip_parse(rule.ip_dst)
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except ValueError:
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return {"status":"Invalid address"}
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rule.port_dst_from, rule.port_dst_to = min(rule.port_dst_from, rule.port_dst_to), max(rule.port_dst_from, rule.port_dst_to)
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rule.port_src_from, rule.port_src_to = min(rule.port_src_from, rule.port_src_to), max(rule.port_src_from, rule.port_src_to)
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if ip_family(rule.ip_dst) != ip_family(rule.ip_src):
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return {"status":"Destination and source addresses must be of the same family"}
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if rule.proto not in ["tcp", "udp", "any"]:
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return {"status":"Invalid protocol"}
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if rule.action not in ["accept", "drop", "reject"]:
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return {"status":"Invalid action"}
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return rule
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@app.post('/rules/set', response_model=RuleAddResponse)
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async def add_new_service(form: list[RuleModel]):
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"""Add a new service"""
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form = [parse_and_check_rule(ele) for ele in form]
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errors = [({"rule":i} | ele) for i, ele in enumerate(form) if isinstance(ele, dict)]
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if len(errors) > 0:
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return {'status': errors}
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try:
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db.queries(["DELETE FROM rules"]+
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[("""
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INSERT INTO rules (
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rule_id, active, name,
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proto,
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ip_src, ip_dst,
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port_src_from, port_dst_from,
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port_src_to, port_dst_to,
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action, mode
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) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ? ,?, ?)""",
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rid, ele.active, ele.name,
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ele.proto,
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ele.ip_src, ele.ip_dst,
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ele.port_src_from, ele.port_dst_from,
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ele.port_src_to, ele.port_dst_to,
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ele.action, ele.mode
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) for rid, ele in enumerate(form)]
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)
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except sqlite3.IntegrityError:
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return {'status': 'Error saving the rules: maybe there are duplicated rules'}
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return await apply_changes()
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