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#
# Copyright (c) 2018 Cisco and/or its affiliates.
# 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.
#
from socket import inet_pton, AF_INET6, AF_INET
import socket
import ipaddress
from . import macaddress
try:
text_type = unicode
except NameError:
text_type = str
# Copies from vl_api_address_t definition
ADDRESS_IP4 = 0
ADDRESS_IP6 = 1
#
# Type conversion for input arguments and return values
#
def format_vl_api_address_t(args):
try:
return {'un': {'ip6': inet_pton(AF_INET6, args)},
'af': ADDRESS_IP6}
# PY2: raises socket.error
# PY3: raises OSError
except (socket.error, OSError):
return {'un': {'ip4': inet_pton(AF_INET, args)},
'af': ADDRESS_IP4}
def format_vl_api_prefix_t(args):
if isinstance(args, (ipaddress.IPv4Network, ipaddress.IPv6Network)):
return {'prefix': format_vl_api_address_t(
text_type(args.network_address)),
'len': int(args.prefixlen)}
p, length = args.split('/')
return {'address': format_vl_api_address_t(p),
'address_length': int(length)}
def format_vl_api_ip6_prefix_t(args):
if isinstance(args, ipaddress.IPv6Network):
return {'prefix': args.network_address.packed,
'len': int(args.prefixlen)}
p, length = args.split('/')
return {'prefix': inet_pton(AF_INET6, p),
'len': int(length)}
def format_vl_api_ip4_prefix_t(args):
if isinstance(args, ipaddress.IPv4Network):
return {'prefix': args.network_address.packed,
'len': int(args.prefixlen)}
p, length = args.split('/')
return {'prefix': inet_pton(AF_INET, p),
'len': int(length)}
conversion_table = {
'vl_api_ip6_address_t':
{
'IPv6Address': lambda o: o.packed,
'str': lambda s: inet_pton(AF_INET6, s)
},
'vl_api_ip4_address_t':
{
'IPv4Address': lambda o: o.packed,
'str': lambda s: inet_pton(AF_INET, s)
},
'vl_api_ip6_prefix_t':
{
'IPv6Network': lambda o: {'prefix': o.network_address.packed,
'len': o.prefixlen},
'str': lambda s: format_vl_api_ip6_prefix_t(s)
},
'vl_api_ip4_prefix_t':
{
'IPv4Network': lambda o: {'prefix': o.network_address.packed,
'len': o.prefixlen},
'str': lambda s: format_vl_api_ip4_prefix_t(s)
},
'vl_api_address_t':
{
'IPv4Address': lambda o: {'af': ADDRESS_IP4, 'un': {'ip4': o.packed}},
'IPv6Address': lambda o: {'af': ADDRESS_IP6, 'un': {'ip6': o.packed}},
'str': lambda s: format_vl_api_address_t(s)
},
'vl_api_prefix_t':
{
'IPv4Network': lambda o: {'prefix':
{'af': ADDRESS_IP4, 'un':
{'ip4': o.network_address.packed}},
'len': o.prefixlen},
'IPv6Network': lambda o: {'prefix':
{'af': ADDRESS_IP6, 'un':
{'ip6': o.network_address.packed}},
'len': o.prefixlen},
'str': lambda s: format_vl_api_prefix_t(s)
},
'vl_api_mac_address_t':
{
'MACAddress': lambda o: o.packed,
'str': lambda s: macaddress.mac_pton(s)
},
}
def unformat_api_address_t(o):
if o.af == 1:
return ipaddress.IPv6Address(o.un.ip6)
if o.af == 0:
return ipaddress.IPv4Address(o.un.ip4)
def unformat_api_prefix_t(o):
if isinstance(o.address, ipaddress.IPv4Address):
return ipaddress.IPv4Network((o.address, o.address_length), False)
if isinstance(o.address, ipaddress.IPv6Address):
return ipaddress.IPv6Network((o.address, o.address_length), False)
conversion_unpacker_table = {
'vl_api_ip6_address_t': lambda o: ipaddress.IPv6Address(o),
'vl_api_ip6_prefix_t': lambda o: ipaddress.IPv6Network((o.prefix, o.len)),
'vl_api_ip4_address_t': lambda o: ipaddress.IPv4Address(o),
'vl_api_ip4_prefix_t': lambda o: ipaddress.IPv4Network((o.prefix, o.len)),
'vl_api_address_t': lambda o: unformat_api_address_t(o),
'vl_api_prefix_t': lambda o: unformat_api_prefix_t(o),
'vl_api_mac_address_t': lambda o: macaddress.MACAddress(o),
}
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