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networkConfig.py
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159 lines (131 loc) · 5.24 KB
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# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
from utilities import bash
from cloudException import CloudRuntimeException, CloudInternalException
import logging
import os
import re
import subprocess
class networkConfig:
class devInfo:
def __init__(self, macAddr, ipAddr, netmask, gateway, type, name):
self.name = name
self.macAdrr = macAddr
self.ipAddr = ipAddr
self.netmask = netmask
self.gateway = gateway
self.type = type
self.name = name
#dhcp or static
self.method = None
@staticmethod
def getDefaultNetwork():
cmd = bash("route -n|awk \'/^0.0.0.0/ {print $2,$8}\'")
if not cmd.isSuccess():
logging.debug("Failed to get default route")
raise CloudRuntimeException("Failed to get default route")
result = cmd.getStdout().split(" ")
gateway = result[0]
dev = result[1]
pdi = networkConfig.getDevInfo(dev)
logging.debug("Found default network device:%s"%pdi.name)
pdi.gateway = gateway
return pdi
@staticmethod
def createBridge(dev, brName):
if not networkConfig.isBridgeSupported():
logging.debug("bridge is not supported")
return False
if networkConfig.isBridgeEnslavedWithDevices(brName):
logging.debug("bridge: %s has devices enslaved"%brName)
return False
cmds = ""
if not networkConfig.isBridge(brName):
cmds = "brctl addbr %s ;"%brName
cmds += "ifconfig %s up;"%brName
cmds += "brctl addif %s %s"%(brName, dev)
return bash(cmds).isSuccess()
@staticmethod
def isBridgeEnslavedWithDevices(brName):
if not networkConfig.isBridge(brName):
return False
if not os.listdir("/sys/class/net/%s/brif"%brName):
return False
return True
@staticmethod
def isBridgeSupported():
if os.path.exists("/proc/sys/net/bridge"):
return True
return bash("modprobe -b bridge").isSucess()
@staticmethod
def isNetworkDev(devName):
return os.path.exists("/sys/class/net/%s" % devName)
@staticmethod
def isBridgePort(devName):
return os.path.exists("/sys/class/net/%s/brport" % devName)
@staticmethod
def isBridge(devName):
return os.path.exists("/sys/class/net/%s/bridge" % devName)
@staticmethod
def isOvsBridge(devName):
try:
return 0==subprocess.check_call(("ovs-vsctl", "br-exists", devName))
except subprocess.CalledProcessError:
return False
@staticmethod
def getBridge(devName):
bridgeName = None
if os.path.exists("/sys/class/net/%s/brport/bridge"%devName):
realPath = os.path.realpath("/sys/class/net/%s/brport/bridge"%devName)
bridgeName = realPath.split("/")[-1]
return bridgeName
@staticmethod
def getEnslavedDev(br, brPort):
if not networkConfig.isBridgeEnslavedWithDevices(br):
return None
for dev in os.listdir("/sys/class/net/%s/brif"%br):
br_port = int(file("/sys/class/net/%s/brif/%s/port_no"%(br,dev)).readline().strip("\n"), 16)
if br_port == brPort:
return dev
return None
@staticmethod
def getDevInfo(dev):
if not networkConfig.isNetworkDev(dev):
logging.debug("dev: " + dev + " is not a network device")
raise CloudInternalException("dev: " + dev + " is not a network device")
netmask = None
ipAddr = None
macAddr = None
cmd = bash("ifconfig " + dev)
if not cmd.isSuccess():
logging.debug("Failed to get address from ifconfig")
raise CloudInternalException("Failed to get network info by ifconfig %s"%dev)
for line in cmd.getLines():
if line.find("HWaddr") != -1:
macAddr = line.split("HWaddr ")[1].strip(" ")
elif line.find("inet ") != -1:
m = re.search("addr:(.*)\ *Bcast:(.*)\ *Mask:(.*)", line)
if m is not None:
ipAddr = m.group(1).rstrip(" ")
netmask = m.group(3).rstrip(" ")
if networkConfig.isBridgePort(dev):
type = "brport"
elif networkConfig.isBridge(dev):
type = "bridge"
else:
type = "dev"
return networkConfig.devInfo(macAddr, ipAddr, netmask, None, type, dev)