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"""
This program is free software: you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Copyright © 2019 Cloud Linux Software Inc.
This software is also available under ImunifyAV commercial license,
see <https://www.imunify360.com/legal/eula>
"""
import asyncio
import logging
from imav.malwarelib.config import (
MalwareScanResourceType,
MalwareScanType,
QueuedScanState,
)
from imav.malwarelib.scan.detached import DetachedState
from imav.malwarelib.scan.queue import QueuedScanBase, ScanQueue
from defence360agent.utils import create_task_and_log_exceptions
from defence360agent.contracts.messages import MessageType
logger = logging.getLogger(__name__)
class QueueSupervisorSync:
queue = ScanQueue()
def __init__(self, loop=None, sink=None):
self.loop = loop or asyncio.get_event_loop()
self.sink = sink
current_scan = self.queue.current_scan
if (
current_scan
and current_scan.detached_scan.get_detached_process_state()
in (DetachedState.RUNNING, DetachedState.FINISHED)
):
current_scan.state = QueuedScanState.running
async def put(
self,
paths,
resource_type: MalwareScanResourceType,
prioritize=False,
**scan_args,
):
logger.info(
"Queuing %s scan for %s", resource_type.value, ", ".join(paths)
)
running_scan = self.queue.current_scan
for path in paths:
if scan := self.queue.find(path=path, resource_type=resource_type):
self.queue.remove(scan)
if (
running_scan
and running_scan.path in paths
and running_scan.resource_type == resource_type
):
await running_scan.detached_scan.handle_aborted_process(
sink=self.sink, kill=True, scan_started=running_scan.started
)
await self.queue.put(
paths,
resource_type=resource_type,
prioritize=prioritize,
**scan_args,
)
self.recheck()
def clear(self):
while self.queue:
self.queue.remove()
def clear_background(self):
while True:
scan = self.queue.find(scan_type=MalwareScanType.BACKGROUND)
if not scan:
break
self.queue.remove(scan)
def remove(self, scan_ids=None):
if scan_ids:
scans = self.queue.find_all(scan_ids)
else:
scans = [scan] if (scan := self.queue.current_scan) else []
paths = [s.path for s in scans]
logger.info("Removing scans from the queue for %s", ", ".join(paths))
for scan in scans:
self.queue.remove(scan)
self.recheck()
def recheck(self):
if not self.queue:
return
scan = self.queue.current_scan
if scan is not None:
if scan.state == QueuedScanState.running:
return
if scan.state == QueuedScanState.stopped:
self.queue.remove(scan)
if self.queue and self.queue.current_scan:
if self.queue.current_scan.state == QueuedScanState.queued:
self._create_scan_task()
def is_empty(self):
return not bool(self.queue)
def status(self):
active_scan = self.queue.current_scan
if active_scan:
return {
**active_scan.status(),
"queued": len(self.queue) - 1,
"resource_type": active_scan.resource_type.value,
"status": QueuedScanState.running.value,
}
return {
"queued": 0,
"status": QueuedScanState.stopped.value,
}
def get_scans_from_paths(self, paths):
return self.queue.get_scans_from_paths(paths)
def _create_scan_task(self):
scan = self.queue.current_scan
scan.state = QueuedScanState.running
create_task_and_log_exceptions(self.loop, self._scan_coro, scan)
async def _scan_coro(self, scan: QueuedScanBase):
scan_data = await scan.start()
if scan_data is not None:
await self.sink.process_message(
MessageType.MalwareScan(**scan_data)
)
else:
self.recheck()
async def update_scan_status(self, scan_ids, status):
self.queue.update(scan_ids, status)