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Add sample script for bringing up a host interface
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Jarrod Johnson
258
misc/prepfish.py
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258
misc/prepfish.py
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# Copyright 2017 Lenovo
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import argparse
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import ctypes
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import fcntl
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import json
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from select import select
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import glob
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import socket
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import struct
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import os
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import subprocess
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import sys
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import time
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class IpmiMsg(ctypes.Structure):
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_fields_ = [('netfn', ctypes.c_ubyte),
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('cmd', ctypes.c_ubyte),
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('data_len', ctypes.c_short),
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('data', ctypes.POINTER(ctypes.c_ubyte))]
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class IpmiSystemInterfaceAddr(ctypes.Structure):
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_fields_ = [('addr_type', ctypes.c_int),
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('channel', ctypes.c_short),
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('lun', ctypes.c_ubyte)]
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class IpmiRecv(ctypes.Structure):
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_fields_ = [('recv_type', ctypes.c_int),
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('addr', ctypes.POINTER(IpmiSystemInterfaceAddr)),
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('addr_len', ctypes.c_uint),
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('msgid', ctypes.c_long),
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('msg', IpmiMsg)]
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class IpmiReq(ctypes.Structure):
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_fields_ = [('addr', ctypes.POINTER(IpmiSystemInterfaceAddr)),
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('addr_len', ctypes.c_uint),
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('msgid', ctypes.c_long),
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('msg', IpmiMsg)]
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_IONONE = 0
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_IOWRITE = 1
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_IOREAD = 2
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IPMICTL_SET_MY_ADDRESS_CMD = (
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_IOREAD << 30 | ctypes.sizeof(ctypes.c_uint) << 16
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| ord('i') << 8 | 17) # from ipmi.h
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IPMICTL_SEND_COMMAND = (
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_IOREAD << 30 | ctypes.sizeof(IpmiReq) << 16
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| ord('i') << 8 | 13) # from ipmi.h
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# next is really IPMICTL_RECEIVE_MSG_TRUNC, but will only use that
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IPMICTL_RECV = (
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(_IOWRITE | _IOREAD) << 30 | ctypes.sizeof(IpmiRecv) << 16
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| ord('i') << 8 | 11) # from ipmi.h
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BMC_SLAVE_ADDR = ctypes.c_uint(0x20)
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CURRCHAN = 0xf
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ADDRTYPE = 0xc
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def get_nicname_from_dmi():
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for fi in glob.glob('/sys/firmware/dmi/entries/42-*/raw'):
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dmit = memoryview(open(fi, 'rb').read())
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if dmit[0] != 42:
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continue
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if dmit[1] < 0xb:
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continue
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if dmit[4] != 0x40: # only supporting network host interface
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continue
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ifdatalen = dmit[5]
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ifdata = dmit[6:6+ifdatalen]
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if ifdata[0] != 2:
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continue
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idvend, idprod = struct.unpack('<HH', ifdata[1:5])
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for nici in glob.glob('/sys/class/net/*'):
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nicname = os.path.basename(nici)
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try:
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nicu = subprocess.check_output(['udevadm', 'info', nici], stderr=subprocess.DEVNULL)
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except Exception:
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raise
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continue
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nicu = nicu.decode()
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if f'ID_VENDOR_ID={idvend:04x}' in nicu and f'ID_MODEL_ID={idprod:04x}' in nicu:
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return nicname
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return None
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def scan_nicname(nicname):
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idx = int(open('/sys/class/net/{}/ifindex'.format(nicname)).read())
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return scan_nic(idx)
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def scan_nic(nicidx):
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srvs = {}
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s6 = socket.socket(socket.AF_INET6, socket.SOCK_DGRAM)
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s6.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_V6ONLY, 1)
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s6.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
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s6.bind(('::', 0))
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msg = b'M-SEARCH * HTTP/1.1\r\nHOST: [ff02::c]:1900\r\nMAN: "ssdp:discover"\r\nST: urn:dmtf-org:service:redfish-rest:1\r\nMX: 3\r\n\r\n'
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s6.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_MULTICAST_IF, nicidx)
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x = [False,]
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tries=5
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while not x[0] and tries:
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try:
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s6.sendto(msg, ('ff02::c', 1900))
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except Exception:
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pass
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x = select((s6,), (), (), 3.0)
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tries -= 1
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if not x[0]:
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raise Exception("Unable to find XCC via SSDP on {}".format(nicidx))
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(rsp, peer) = s6.recvfrom(9000)
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if '%' in peer[0]:
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return peer[0]
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else:
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return '{}%{}'.format(peer[0], nicidx)
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class Session(object):
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def __init__(self, devnode='/dev/ipmi0'):
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"""Create a local session inband
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:param: devnode: The path to the ipmi device
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"""
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self.ipmidev = open(devnode, 'r+')
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fcntl.ioctl(self.ipmidev, IPMICTL_SET_MY_ADDRESS_CMD, BMC_SLAVE_ADDR)
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# the interface is initted, create some reusable memory for our session
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self.databuffer = ctypes.create_string_buffer(4096)
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self.req = IpmiReq()
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self.rsp = IpmiRecv()
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self.addr = IpmiSystemInterfaceAddr()
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self.req.msg.data = ctypes.cast(
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ctypes.addressof(self.databuffer),
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ctypes.POINTER(ctypes.c_ubyte))
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self.rsp.msg.data = self.req.msg.data
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self.userid = None
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self.password = None
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def await_reply(self):
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rd, _, _ = select((self.ipmidev,), (), (), 1)
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while not rd:
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rd, _, _ = select((self.ipmidev,), (), (), 1)
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def pause(self, seconds):
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time.sleep(seconds)
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@property
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def parsed_rsp(self):
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response = {'netfn': self.rsp.msg.netfn, 'command': self.rsp.msg.cmd,
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'code': bytearray(self.databuffer.raw)[0],
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'data': bytearray(
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self.databuffer.raw[1:self.rsp.msg.data_len])}
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return response
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def raw_command(self,
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netfn,
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command,
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data=(),
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bridge_request=None,
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retry=True,
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delay_xmit=None,
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timeout=None,
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waitall=False, rslun=0):
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self.addr.channel = CURRCHAN
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self.addr.addr_type = ADDRTYPE
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self.addr.lun = rslun
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self.req.addr_len = ctypes.sizeof(IpmiSystemInterfaceAddr)
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self.req.addr = ctypes.pointer(self.addr)
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self.req.msg.netfn = netfn
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self.req.msg.cmd = command
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if data:
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data = memoryview(bytearray(data))
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try:
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self.databuffer[:len(data)] = data[:len(data)]
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except ValueError:
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self.databuffer[:len(data)] = data[:len(data)].tobytes()
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self.req.msg.data_len = len(data)
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fcntl.ioctl(self.ipmidev, IPMICTL_SEND_COMMAND, self.req)
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self.await_reply()
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self.rsp.msg.data_len = 4096
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self.rsp.addr = ctypes.pointer(self.addr)
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self.rsp.addr_len = ctypes.sizeof(IpmiSystemInterfaceAddr)
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fcntl.ioctl(self.ipmidev, IPMICTL_RECV, self.rsp)
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return self.parsed_rsp
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def dotwait():
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sys.stderr.write('.')
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sys.stderr.flush()
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time.sleep(0.5)
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def disable_host_interface():
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s = Session('/dev/ipmi0')
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rsp = s.raw_command(netfn=0xc, command=1, data=(1, 0xc1, 0))
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def get_redfish_creds():
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os.makedirs('/run/fauxonecli', exist_ok=True, mode=0o700)
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s = Session('/dev/ipmi0')
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try:
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with open('/run/fauxonecli/credentials', 'rb') as credin:
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cred = credin.read()
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except FileNotFoundError:
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rsp = s.raw_command(netfn=0x2c, command=2, data=(0x52, 0xa5))
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cred = bytes(rsp['data'])
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with open('/run/fauxonecli/credentials', 'wb') as credout:
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credout.write(cred)
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if cred[0] == 0x52:
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cred = cred[1:]
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creds = cred.split(b'\x00')[:2]
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return creds
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def enable_host_interface():
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s = Session('/dev/ipmi0')
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rsp = s.raw_command(netfn=0xc, command=2, data=(1, 0xc1, 0, 0))
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usbenabled = rsp['data'][1] == 1
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disableusb = not usbenabled
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if not usbenabled:
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s.raw_command(netfn=0xc, command=1, data=(1, 0xc1, 1))
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sys.stderr.write("Enabling USB Interface")
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rsp = s.raw_command(netfn=0xc, command=2, data=(1, 0xc1, 0, 0))
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usbenabled = rsp['data'][1] == 1
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while not usbenabled:
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dotwait()
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rsp = s.raw_command(netfn=0xc, command=2, data=(1, 0xc1, 0, 0))
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usbenabled = rsp['data'][1] == 1
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usbnic = get_nicname_from_dmi()
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while not usbnic:
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dotwait()
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usbnic = get_nicname_from_dmi()
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bmctarg = scan_nicname(usbnic)
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while not bmctarg:
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dotwait()
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bmctarg = scan_nicname(usbnic)
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sys.stderr.write("USB NIC Established\n")
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sys.stderr.flush()
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return bmctarg
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def main():
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bmcuser, bmcpass = get_redfish_creds()
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bmc = enable_host_interface()
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print('Redfish user: {}'.format(bmcuser.decode()))
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print('Redfish password: {}'.format(bmcpass.decode()))
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print('Redfish host: https://[{}]/'.format(bmc))
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if __name__ == '__main__':
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main()
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