94 lines
3.6 KiB
Python
94 lines
3.6 KiB
Python
# 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 os
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import ctypes.util
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import ipaddress
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import collections
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import socket
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from typing import Iterable, Optional
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import RNS.vendor.ifaddr._shared as shared
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class ifaddrs(ctypes.Structure):
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pass
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ifaddrs._fields_ = [
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('ifa_next', ctypes.POINTER(ifaddrs)),
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('ifa_name', ctypes.c_char_p),
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('ifa_flags', ctypes.c_uint),
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('ifa_addr', ctypes.POINTER(shared.sockaddr)),
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('ifa_netmask', ctypes.POINTER(shared.sockaddr)),
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]
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libc = ctypes.CDLL(ctypes.util.find_library("socket" if os.uname()[0] == "SunOS" else "c"), use_errno=True) # type: ignore
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def get_adapters(include_unconfigured: bool = False) -> Iterable[shared.Adapter]:
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addr0 = addr = ctypes.POINTER(ifaddrs)()
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retval = libc.getifaddrs(ctypes.byref(addr))
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if retval != 0:
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eno = ctypes.get_errno()
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raise OSError(eno, os.strerror(eno))
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ips = collections.OrderedDict()
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def add_ip(adapter_name: str, ip: Optional[shared.IP]) -> None:
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if adapter_name not in ips:
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index = None # type: Optional[int]
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try:
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# Mypy errors on this when the Windows CI runs:
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# error: Module has no attribute "if_nametoindex"
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index = socket.if_nametoindex(adapter_name) # type: ignore
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except (OSError, AttributeError):
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pass
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ips[adapter_name] = shared.Adapter(adapter_name, adapter_name, [], index=index)
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if ip is not None:
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ips[adapter_name].ips.append(ip)
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while addr:
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name = addr[0].ifa_name.decode(encoding='UTF-8')
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ip_addr = shared.sockaddr_to_ip(addr[0].ifa_addr)
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if ip_addr:
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if addr[0].ifa_netmask and not addr[0].ifa_netmask[0].sa_familiy:
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addr[0].ifa_netmask[0].sa_familiy = addr[0].ifa_addr[0].sa_familiy
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netmask = shared.sockaddr_to_ip(addr[0].ifa_netmask)
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if isinstance(netmask, tuple):
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netmaskStr = str(netmask[0])
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prefixlen = shared.ipv6_prefixlength(ipaddress.IPv6Address(netmaskStr))
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else:
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assert netmask is not None, f'sockaddr_to_ip({addr[0].ifa_netmask}) returned None'
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netmaskStr = str('0.0.0.0/' + netmask)
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prefixlen = ipaddress.IPv4Network(netmaskStr).prefixlen
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ip = shared.IP(ip_addr, prefixlen, name)
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add_ip(name, ip)
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else:
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if include_unconfigured:
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add_ip(name, None)
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addr = addr[0].ifa_next
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libc.freeifaddrs(addr0)
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return ips.values()
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