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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 asyncio
import functools
from typing import Dict
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 ...clients.kvmd import KvmdClient
from ... import aiotools
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,
kvmd: KvmdClient,
host: str,
port: str,
timeout: float,
) -> None:
super().__init__(authdata=auth_manager, address=host, port=port)
self.__auth_manager = auth_manager
self.__kvmd = kvmd
self.__host = host
self.__port = port
self.__timeout = 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(session, "atx.get_state()", "atx.get_state")
data = [int(result["leds"]["power"]), 0, 0]
session.send_ipmi_response(data=data)
def __chassis_control_handler(self, request: Dict, session: IpmiServerSession) -> None:
action = {
0: "off_hard",
1: "on",
3: "reset_hard",
5: "off",
}.get(request["data"][0], "")
if action:
if not self.__make_request(session, f"atx.switch_power({action})", "atx.switch_power", action=action):
code = 0xC0 # Try again later
else:
code = 0
else:
code = 0xCC # Invalid request
session.send_ipmi_response(code=code)
# =====
def __make_request(self, session: IpmiServerSession, name: str, method_path: str, **kwargs): # type: ignore
async def runner(): # type: ignore
logger = get_logger(0)
credentials = self.__auth_manager.get_credentials(session.username.decode())
logger.info("Client %s: Performing request %s from user %r (IPMI) as %r (KVMD)",
session.sockaddr[0], name, credentials.ipmi_user, credentials.kvmd_user)
try:
async with self.__kvmd.make_session(credentials.kvmd_user, credentials.kvmd_passwd) as kvmd_session:
method = functools.reduce(getattr, method_path.split("."), kvmd_session)
return (await method(**kwargs))
except (aiohttp.ClientError, asyncio.TimeoutError) as err:
logger.error("Can't perform request %s: %s", name, err)
raise
return aiotools.run_sync(runner())
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