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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, inet_ntop, AF_INET6, AF_INET
import socket
class VPPFormatError(Exception):
pass
class VPPFormat(object):
VPPFormatError = VPPFormatError
@staticmethod
def format_vl_api_ip6_prefix_t(args):
prefix, len = args.split('/')
return {'prefix': {'address': inet_pton(AF_INET6, prefix)},
'len': int(len)}
@staticmethod
def unformat_vl_api_ip6_prefix_t(args):
return "{}/{}".format(inet_ntop(AF_INET6, args.prefix),
args.len)
@staticmethod
def format_vl_api_ip4_prefix_t(args):
prefix, len = args.split('/')
return {'prefix': {'address': inet_pton(AF_INET, prefix)},
'len': int(len)}
@staticmethod
def unformat_vl_api_ip4_prefix_t(args):
return "{}/{}".format(inet_ntop(AF_INET, args.prefix),
args.len)
@staticmethod
def format_vl_api_ip6_address_t(args):
return {'address': inet_pton(AF_INET6, args)}
@staticmethod
def format_vl_api_ip4_address_t(args):
return {'address': inet_pton(AF_INET, args)}
@staticmethod
def format_vl_api_address_t(args):
try:
return {'un': {'ip6': inet_pton(AF_INET6, args)},
'af': int(1)}
except socket.error as e:
return {'un': {'ip4': inet_pton(AF_INET, args)},
'af': int(0)}
@staticmethod
def unformat_vl_api_address_t(arg):
if arg.af == 1:
return inet_ntop(AF_INET6, arg.un.ip6)
if arg.af == 0:
return inet_ntop(AF_INET, arg.un.ip4)
raise VPPFormatError
@staticmethod
def format_vl_api_prefix_t(args):
prefix, len = args.split('/')
return {'address': VPPFormat.format_vl_api_address_t(prefix),
'address_length': int(len)}
@staticmethod
def unformat_vl_api_prefix_t(arg):
if arg.address.af == 1:
return "{}/{}".format(inet_ntop(AF_INET6,
arg.address.un.ip6),
arg.address_length)
if arg.address.af == 0:
return "{}/{}".format(inet_ntop(AF_INET,
arg.address.un.ip4),
arg.address_length)
raise VPPFormatError
@staticmethod
def format_u8(args):
try:
return int(args)
except Exception as e:
return args.encode()
@staticmethod
def format(typename, args):
try:
return getattr(VPPFormat, 'format_' + typename)(args)
except AttributeError:
# Default
return (int(args))
@staticmethod
def unformat_bytes(args):
try:
return args.decode('utf-8')
except ValueError as e:
return args
@staticmethod
def unformat_list(args):
s = '['
for f in args:
t = type(f).__name__
if type(f) is int:
s2 = str(f)
else:
s2 = VPPFormat.unformat_t(t, f)
s += '{} '.format(s2)
return s[:-1] + ']'
@staticmethod
def unformat(args):
s = ''
return VPPFormat.unformat_t(type(args).__name__, args)
'''
for i, f in enumerate(args):
print('F', f)
t = type(f).__name__
if type(f) is int:
s2 = str(f)
else:
s2 = VPPFormat.unformat_t(t, f)
s += '{} {} '.format(args._fields[i], s2)
return s[:-1]
'''
@staticmethod
def unformat_t(typename, args):
try:
return getattr(VPPFormat, 'unformat_' + typename)(args)
except AttributeError:
# Type without explicit override
return VPPFormat.unformat(args)
# Default handling
return args
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