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# Copyright 2012 OpenStack Foundation
# All Rights Reserved.
#
# Licensed 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.
import itertools
import netaddr
import random
import uuid
def rand_uuid():
return str(uuid.uuid4())
def rand_uuid_hex():
return uuid.uuid4().hex
def rand_name(name='', prefix=None):
randbits = str(random.randint(1, 0x7fffffff))
rand_name = randbits
if name:
rand_name = name + '-' + rand_name
if prefix:
rand_name = prefix + '-' + rand_name
return rand_name
def rand_url():
randbits = str(random.randint(1, 0x7fffffff))
return 'https://url-' + randbits + '.com'
def rand_int_id(start=0, end=0x7fffffff):
return random.randint(start, end)
def rand_mac_address():
"""Generate an Ethernet MAC address."""
# NOTE(vish): We would prefer to use 0xfe here to ensure that linux
# bridge mac addresses don't change, but it appears to
# conflict with libvirt, so we use the next highest octet
# that has the unicast and locally administered bits set
# properly: 0xfa.
# Discussion: https://bugs.launchpad.net/nova/+bug/921838
mac = [0xfa, 0x16, 0x3e,
random.randint(0x00, 0xff),
random.randint(0x00, 0xff),
random.randint(0x00, 0xff)]
return ':'.join(["%02x" % x for x in mac])
def parse_image_id(image_ref):
"""Return the image id from a given image ref."""
return image_ref.rsplit('/')[-1]
def arbitrary_string(size=4, base_text=None):
"""Return size characters from base_text
Repeating the base_text infinitely if needed.
"""
if not base_text:
base_text = 'test'
return ''.join(itertools.islice(itertools.cycle(base_text), size))
def random_bytes(size=1024):
"""Return size randomly selected bytes as a string."""
return ''.join([chr(random.randint(0, 255))
for i in range(size)])
def get_ipv6_addr_by_EUI64(cidr, mac):
# Check if the prefix is IPv4 address
is_ipv4 = netaddr.valid_ipv4(cidr)
if is_ipv4:
msg = "Unable to generate IP address by EUI64 for IPv4 prefix"
raise TypeError(msg)
try:
eui64 = int(netaddr.EUI(mac).eui64())
prefix = netaddr.IPNetwork(cidr)
return netaddr.IPAddress(prefix.first + eui64 ^ (1 << 57))
except (ValueError, netaddr.AddrFormatError):
raise TypeError('Bad prefix or mac format for generating IPv6 '
'address by EUI-64: %(prefix)s, %(mac)s:'
% {'prefix': cidr, 'mac': mac})
except TypeError:
raise TypeError('Bad prefix type for generate IPv6 address by '
'EUI-64: %s' % cidr)
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