92 lines
2.4 KiB
Python
92 lines
2.4 KiB
Python
# Copyright 2014 Huawei Technologies Co. Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Validator methods. Please note that functions below may not the best way
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to do the validation.
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"""
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# TODO(xiaodong): please refactor/rewrite the following functions as necessary
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import netaddr
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import re
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import socket
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def is_valid_ip(ip_addr):
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"""Valid the format of an IP address."""
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if not ip_addr:
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return False
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try:
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socket.inet_aton(ip_addr)
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except socket.error:
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return False
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return True
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def is_valid_ipNetowrk(ip_network):
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"""Valid the format of an Ip network."""
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if not ip_network:
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return False
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regex = (r'^(([0-9]|[1-9][0-9]|1[0-9]{2}|[1-2][0-4][0-9]|25[0-5])\.)'
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r'{3}'
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r'([0-9]|[1-9][0-9]|1[0-9]{2}|[1-2][0-4][0-9]|25[0-5])'
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r'((\/[0-9]|\/[1-2][0-9]|\/[1-3][0-2]))$')
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if re.match(regex, ip_network):
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return True
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return False
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def is_valid_netmask(ip_addr):
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"""Valid the format of a netmask."""
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if not ip_addr:
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return False
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try:
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ip_address = netaddr.IPAddress(ip_addr)
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return ip_address.is_netmask()
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except Exception:
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return False
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def is_valid_gateway(ip_addr):
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"""Valid the format of gateway."""
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if not ip_addr:
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return False
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invalid_ip_prefix = ['0', '224', '169', '127']
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try:
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# Check if ip_addr is an IP address and not start with 0
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ip_addr_prefix = ip_addr.split('.')[0]
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if is_valid_ip(ip_addr) and ip_addr_prefix not in invalid_ip_prefix:
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ip_address = netaddr.IPAddress(ip_addr)
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if not ip_address.is_multicast():
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# Check if ip_addr is not multicast and reserved IP
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return True
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return False
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except Exception:
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return False
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def is_valid_dnsServer(dns):
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"""Valid the format of DNS."""
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if dns and not is_valid_ip(dns):
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return False
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return True
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