146 lines
5 KiB
Python
146 lines
5 KiB
Python
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# Copyright (c) 2014 Stefan C. Mueller
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to
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# deal in the Software without restriction, including without limitation the
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# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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# sell copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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# IN THE SOFTWARE.
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import ctypes
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from ctypes import wintypes
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from typing import Iterable, List
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import ifaddr._shared as shared
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NO_ERROR = 0
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ERROR_BUFFER_OVERFLOW = 111
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MAX_ADAPTER_NAME_LENGTH = 256
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MAX_ADAPTER_DESCRIPTION_LENGTH = 128
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MAX_ADAPTER_ADDRESS_LENGTH = 8
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AF_UNSPEC = 0
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class SOCKET_ADDRESS(ctypes.Structure):
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_fields_ = [('lpSockaddr', ctypes.POINTER(shared.sockaddr)), ('iSockaddrLength', wintypes.INT)]
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class IP_ADAPTER_UNICAST_ADDRESS(ctypes.Structure):
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pass
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IP_ADAPTER_UNICAST_ADDRESS._fields_ = [
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('Length', wintypes.ULONG),
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('Flags', wintypes.DWORD),
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('Next', ctypes.POINTER(IP_ADAPTER_UNICAST_ADDRESS)),
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('Address', SOCKET_ADDRESS),
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('PrefixOrigin', ctypes.c_uint),
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('SuffixOrigin', ctypes.c_uint),
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('DadState', ctypes.c_uint),
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('ValidLifetime', wintypes.ULONG),
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('PreferredLifetime', wintypes.ULONG),
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('LeaseLifetime', wintypes.ULONG),
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('OnLinkPrefixLength', ctypes.c_uint8),
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]
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class IP_ADAPTER_ADDRESSES(ctypes.Structure):
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pass
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IP_ADAPTER_ADDRESSES._fields_ = [
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('Length', wintypes.ULONG),
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('IfIndex', wintypes.DWORD),
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('Next', ctypes.POINTER(IP_ADAPTER_ADDRESSES)),
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('AdapterName', ctypes.c_char_p),
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('FirstUnicastAddress', ctypes.POINTER(IP_ADAPTER_UNICAST_ADDRESS)),
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('FirstAnycastAddress', ctypes.c_void_p),
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('FirstMulticastAddress', ctypes.c_void_p),
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('FirstDnsServerAddress', ctypes.c_void_p),
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('DnsSuffix', ctypes.c_wchar_p),
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('Description', ctypes.c_wchar_p),
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('FriendlyName', ctypes.c_wchar_p),
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]
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iphlpapi = ctypes.windll.LoadLibrary("Iphlpapi") # type: ignore
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def enumerate_interfaces_of_adapter(
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nice_name: str, address: IP_ADAPTER_UNICAST_ADDRESS
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) -> Iterable[shared.IP]:
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# Iterate through linked list and fill list
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addresses = [] # type: List[IP_ADAPTER_UNICAST_ADDRESS]
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while True:
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addresses.append(address)
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if not address.Next:
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break
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address = address.Next[0]
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for address in addresses:
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ip = shared.sockaddr_to_ip(address.Address.lpSockaddr)
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assert ip is not None, f'sockaddr_to_ip({address.Address.lpSockaddr}) returned None'
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network_prefix = address.OnLinkPrefixLength
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yield shared.IP(ip, network_prefix, nice_name)
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def get_adapters(include_unconfigured: bool = False) -> Iterable[shared.Adapter]:
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# Call GetAdaptersAddresses() with error and buffer size handling
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addressbuffersize = wintypes.ULONG(15 * 1024)
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retval = ERROR_BUFFER_OVERFLOW
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while retval == ERROR_BUFFER_OVERFLOW:
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addressbuffer = ctypes.create_string_buffer(addressbuffersize.value)
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retval = iphlpapi.GetAdaptersAddresses(
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wintypes.ULONG(AF_UNSPEC),
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wintypes.ULONG(0),
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None,
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ctypes.byref(addressbuffer),
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ctypes.byref(addressbuffersize),
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)
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if retval != NO_ERROR:
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raise ctypes.WinError() # type: ignore
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# Iterate through adapters fill array
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address_infos = [] # type: List[IP_ADAPTER_ADDRESSES]
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address_info = IP_ADAPTER_ADDRESSES.from_buffer(addressbuffer)
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while True:
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address_infos.append(address_info)
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if not address_info.Next:
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break
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address_info = address_info.Next[0]
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# Iterate through unicast addresses
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result = [] # type: List[shared.Adapter]
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for adapter_info in address_infos:
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# We don't expect non-ascii characters here, so encoding shouldn't matter
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name = adapter_info.AdapterName.decode()
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nice_name = adapter_info.Description
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index = adapter_info.IfIndex
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if adapter_info.FirstUnicastAddress:
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ips = enumerate_interfaces_of_adapter(
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adapter_info.FriendlyName, adapter_info.FirstUnicastAddress[0]
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)
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ips = list(ips)
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result.append(shared.Adapter(name, nice_name, ips, index=index))
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elif include_unconfigured:
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result.append(shared.Adapter(name, nice_name, [], index=index))
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return result
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