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# ========================================================================== #
# #
# KVMD - The main Pi-KVM daemon. #
# #
# Copyright (C) 2018 Maxim Devaev <[email protected]> #
# #
# 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/>. #
# #
# ========================================================================== #
import sys
import asyncio
import threading
from typing import Tuple
from typing import Dict
from typing import Optional
import aiohttp
from pyghmi.ipmi.private.session import Session as IpmiSession
from pyghmi.ipmi.private.serversession import IpmiServer as BaseIpmiServer
from pyghmi.ipmi.private.serversession import ServerSession as IpmiServerSession
from ...logging import get_logger
from ... import __version__
from .auth import IpmiAuthManager
# =====
class IpmiServer(BaseIpmiServer): # pylint: disable=too-many-instance-attributes,abstract-method
# https://www.intel.com/content/dam/www/public/us/en/documents/product-briefs/ipmi-second-gen-interface-spec-v2-rev1-1.pdf
# https://www.thomas-krenn.com/en/wiki/IPMI_Basics
def __init__(
self,
auth_manager: IpmiAuthManager,
host: str,
port: str,
timeout: float,
kvmd_host: str,
kvmd_port: int,
kvmd_unix_path: str,
kvmd_timeout: float,
) -> None:
super().__init__(authdata=auth_manager, address=host, port=port)
self.__auth_manager = auth_manager
self.__host = host
self.__port = port
self.__timeout = timeout
self.__kvmd_host = kvmd_host
self.__kvmd_port = kvmd_port
self.__kvmd_unix_path = kvmd_unix_path
self.__kvmd_timeout = kvmd_timeout
def run(self) -> None:
logger = get_logger(0)
logger.info("Listening IPMI on UPD [%s]:%d ...", self.__host, self.__port)
try:
while True:
IpmiSession.wait_for_rsp(self.__timeout)
except (SystemExit, KeyboardInterrupt):
pass
logger.info("Bye-bye")
# =====
def handle_raw_request(self, request: Dict, session: IpmiServerSession) -> None:
handler = {
(6, 1): lambda _, session: self.send_device_id(session), # Get device ID
(0, 1): self.__get_chassis_status_handler, # Get chassis status
(0, 2): self.__chassis_control_handler, # Chassis control
}.get((request["netfn"], request["command"]))
if handler is not None:
try:
handler(request, session)
except (aiohttp.ClientError, asyncio.TimeoutError):
session.send_ipmi_response(code=0xFF)
except Exception:
get_logger(0).exception("Unexpected exception while handling IPMI request: netfn=%d; command=%d",
request["netfn"], request["command"])
session.send_ipmi_response(code=0xFF)
else:
session.send_ipmi_response(code=0xC1)
def __get_chassis_status_handler(self, _: Dict, session: IpmiServerSession) -> None:
result = self.__make_request("GET", "/atx", session)[1]
data = [int(result["leds"]["power"]), 0, 0]
session.send_ipmi_response(data=data)
def __chassis_control_handler(self, request: Dict, session: IpmiServerSession) -> None:
handle = {
0: "/atx/power?action=off",
1: "/atx/power?action=on",
3: "/atx/power?action=reset",
5: "/atx/power?action=off_soft",
}.get(request["data"][0], "")
if handle:
if self.__make_request("POST", handle, session)[0] == 409:
code = 0xC0 # Try again later
else:
code = 0
else:
code = 0xCC # Invalid request
session.send_ipmi_response(code=code)
# =====
def __make_request(self, method: str, handle: str, ipmi_session: IpmiServerSession) -> Tuple[int, Dict]:
result: Optional[Tuple[int, Dict]] = None
exc_info = None
def make_request() -> None:
nonlocal result
nonlocal exc_info
loop = asyncio.new_event_loop()
try:
result = loop.run_until_complete(self.__make_request_async(method, handle, ipmi_session))
except: # noqa: E722 # pylint: disable=bare-except
exc_info = sys.exc_info()
finally:
loop.close()
thread = threading.Thread(target=make_request, daemon=True)
thread.start()
thread.join()
if exc_info is not None:
raise exc_info[1].with_traceback(exc_info[2]) # type: ignore # pylint: disable=unsubscriptable-object
assert result is not None
# Dirty pylint hack
return (result[0], result[1]) # pylint: disable=unsubscriptable-object
async def __make_request_async(self, method: str, handle: str, ipmi_session: IpmiServerSession) -> Tuple[int, Dict]:
logger = get_logger(0)
assert handle.startswith("/")
url = "http://%s:%d%s" % (self.__kvmd_host, self.__kvmd_port, handle)
credentials = self.__auth_manager.get_credentials(ipmi_session.username.decode())
logger.info("Performing %r request to %r from user %r (IPMI) as %r (KVMD)",
method, url, credentials.ipmi_user, credentials.kvmd_user)
async with self.__make_http_session_async() as http_session:
try:
async with http_session.request(
method=method,
url=url,
headers={
"X-KVMD-User": credentials.kvmd_user,
"X-KVMD-Passwd": credentials.kvmd_passwd,
"User-Agent": "KVMD-IPMI/%s" % (__version__),
},
timeout=self.__kvmd_timeout,
) as response:
if response.status != 409:
response.raise_for_status()
return (response.status, (await response.json())["result"])
except (aiohttp.ClientError, asyncio.TimeoutError) as err:
logger.error("Can't perform %r request to %r: %s: %s", method, url, type(err).__name__, str(err))
raise
except Exception:
logger.exception("Unexpected exception while performing %r request to %r", method, url)
raise
def __make_http_session_async(self) -> aiohttp.ClientSession:
if self.__kvmd_unix_path:
return aiohttp.ClientSession(connector=aiohttp.UnixConnector(path=self.__kvmd_unix_path))
else:
return aiohttp.ClientSession()
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