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#!/usr/bin/python
"""
Copyright (C) International Business Machines Corp., 2005, 2006
Authors: Dan Smith <danms@us.ibm.com>
Daniel Stekloff <dsteklof@us.ibm.com>
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; under version 2 of the License.
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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""
import sys
import commands
import os
import re
import time
import random
from xen.xend.sxp import Parser
from Xm import *
from Test import *
from config import *
class NetworkError(Exception):
def __init__(self, msg):
self.errMsg = msg
def __str__(self):
return str(self.errMsg)
def getXendNetConfig():
# Find out what environment we're in: bridge, nat, or route
xconfig = os.getenv("XEND_CONFIG")
if not xconfig:
xconfig = "/etc/xen/xend-config.sxp"
try:
configfile = open(xconfig, 'r')
except:
return "bridge"
S = configfile.read()
pin = Parser()
pin.input(S)
pin.input_eof()
val = pin.get_val()
while val[0] != 'network-script':
val = pin.get_val()
if val[0] != 'network-script' or len(val) < 2:
# entry network-script not found or no type specified
netenv = "bridge"
else:
# split network command into script name and its parameters
sub_val = val[1].split()
if sub_val[0] == "network-bridge":
netenv = "bridge"
elif sub_val[0] == "network-route":
netenv = "route"
elif sub_val[0] == "network-nat":
netenv = "nat"
else:
raise NetworkError("Failed to get network env from xend config")
configfile.close()
return netenv
class NetConfig:
def __init__(self):
self.netenv = getXendNetConfig()
self.used_ips = {}
self.free_oct_ips = [ 0, 0, 0, 0 ]
self.total_ips = 0
if NETWORK_IP_RANGE == 'dhcp':
self.netmask = NETWORK_IP_RANGE
self.network = NETWORK_IP_RANGE
self.max_ip = NETWORK_IP_RANGE
self.min_ip = NETWORK_IP_RANGE
else:
self.netmask = NETMASK
self.network = NETWORK
s_ip = ''
# Get starting ip and max ip from configured ip range
s_ip = NETWORK_IP_RANGE
ips = s_ip.split("-")
self.max_ip = ips[1]
self.min_ip = ips[0]
self.__setMaxNumberIPs()
# Clean out any aliases in the network range for dom0's interface.
# If an alias exists, a test xendevice add command could fail.
if NETWORK_IP_RANGE != "dhcp":
self.__cleanDom0Aliases()
def __setMaxNumberIPs(self):
# Count the number of IPs available, to help tests know whether they
# have enough to run or not
masko = self.netmask.split('.')
maxo = self.max_ip.split('.')
mino = self.min_ip.split('.')
ips = 0
# Last octet
self.free_oct_ips[3] = (int(maxo[3]) - int(mino[3])) + 1
# 3rd octet
self.free_oct_ips[2] = (int(maxo[2]) - int(mino[2])) + 1
# 2nd octet
self.free_oct_ips[1] = (int(maxo[1]) - int(mino[1])) + 1
# 1st octet
self.free_oct_ips[0] = (int(maxo[0]) - int(mino[0])) + 1
self.total_ips = self.free_oct_ips[3]
if self.free_oct_ips[2] > 1:
self.total_ips = (self.total_ips * self.free_oct_ips[2])
if self.free_oct_ips[1] > 1:
self.total_ips = (self.total_ips * self.free_oct_ips[1])
if self.free_oct_ips[0] > 1:
self.total_ips = (self.total_ips * self.free_oct_ips[0])
def __cleanDom0Aliases(self):
# Remove any aliases within the supplied network IP range on dom0
scmd = 'ip addr show dev %s' % (DOM0_INTF)
status, output = traceCommand(scmd)
if status:
raise NetworkError("Failed to show %s aliases: %d" %
(DOM0_INTF, status))
lines = output.split("\n")
for line in lines:
ip = re.search('(\d+\.\d+\.\d+\.\d+)', line)
if ip and self.isIPInRange(ip.group(1)) == True:
dcmd = 'ip addr del %s/32 dev %s' % (ip.group(1), DOM0_INTF)
dstatus, doutput = traceCommand(dcmd)
if dstatus:
raise NetworkError("Failed to remove %s aliases: %d" %
(DOM0_INTF, status))
def getNetEnv(self):
return self.netenv
def setUsedIP(self, domname, interface, ip):
self.used_ips['%s:%s' % (domname, interface)] = ip
def __findFirstOctetIP(self, prefix, min, max):
for i in range(min, max):
ip = '%s%s' % (prefix, str(i))
found = False
for k in self.used_ips.keys():
if self.used_ips[k] == ip:
found = True
if found == False:
return ip
if found == True:
return None
def getFreeIP(self, domname, interface):
# Get a free IP. It uses the starting ip octets and then the
# total number of allowed numbers for that octet. It only
# calculates ips for the last two octets, we shouldn't need more
start_octets = self.min_ip.split(".")
ip = None
# Only working with ips from last two octets, shouldn't need more
max = int(start_octets[2]) + self.free_oct_ips[2]
for i in range(int(start_octets[2]), max):
prefix = '%s.%s.%s.' % (start_octets[0], start_octets[1], str(i))
ip = self.__findFirstOctetIP(prefix, int(start_octets[3]), self.free_oct_ips[3])
if ip:
break
if not ip:
raise NetworkError("Ran out of configured addresses.")
self.setUsedIP(domname, interface, ip)
return ip
def getNetMask(self):
return self.netmask
def getNetwork(self):
return self.network
def getIP(self, domname, interface):
# Depending on environment, set an IP. Uses the configured range
# of IPs, network address, and netmask
if NETWORK_IP_RANGE == "dhcp":
return None
# Make sure domain and interface aren't already assigned an IP
if self.used_ips.has_key('%s:%s' % (domname, interface)):
raise NetworkError("Domain %s interface %s is already has IP"
% (domname, interface))
return self.getFreeIP(domname, interface)
def setIP(self, domname, interface, ip):
# Make sure domain and interface aren't already assigned an IP
if self.used_ips.has_key('%s:%s' % (domname, interface)):
raise NetworkError("Domain %s interface %s is already has IP"
% (domname, interface))
self.setUsedIP(domname, interface, ip)
def releaseIP(self, domname, interface, ip):
if self.used_ips.has_key('%s:%s' % (domname, interface)):
del self.used_ips['%s:%s' % (domname, interface)]
def getNumberAllowedIPs(self):
return self.total_ips
def canRunNetTest(self, ips):
# Check to see if a test can run, returns true or false. Input is
# number of ips needed.
if NETWORK_IP_RANGE == "dhcp":
return True
if self.total_ips >= ips:
return True
return False
def isIPInRange(self, ip):
# Checks to see if supplied ip is in the range of allowed ips
maxo = self.max_ip.split('.')
mino = self.min_ip.split('.')
ipo = ip.split('.')
if int(ipo[0]) < int(mino[0]):
return False
elif int(ipo[0]) > int(maxo[0]):
return False
if int(ipo[1]) < int(mino[1]):
return False
elif int(ipo[1]) > int(maxo[1]):
return False
if int(ipo[2]) < int(mino[2]):
return False
elif int(ipo[2]) > int(maxo[2]):
return False
if int(ipo[3]) < int(mino[3]):
return False
elif int(ipo[3]) > int(maxo[3]):
return False
return True
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