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# Copyright (c) 2014 Stefan C. Mueller
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to
# deal in the Software without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
# sell copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
import os
import ctypes.util
import ipaddress
import collections
import socket
from typing import Iterable, Optional
import ifaddr._shared as shared
# from ifaddr._shared import sockaddr, Interface, sockaddr_to_ip, ipv6_prefixlength
class ifaddrs(ctypes.Structure):
pass
ifaddrs._fields_ = [
('ifa_next', ctypes.POINTER(ifaddrs)),
('ifa_name', ctypes.c_char_p),
('ifa_flags', ctypes.c_uint),
('ifa_addr', ctypes.POINTER(shared.sockaddr)),
('ifa_netmask', ctypes.POINTER(shared.sockaddr)),
]
libc = ctypes.CDLL(ctypes.util.find_library("socket" if os.uname()[0] == "SunOS" else "c"), use_errno=True) # type: ignore
def get_adapters(include_unconfigured: bool = False) -> Iterable[shared.Adapter]:
addr0 = addr = ctypes.POINTER(ifaddrs)()
retval = libc.getifaddrs(ctypes.byref(addr))
if retval != 0:
eno = ctypes.get_errno()
raise OSError(eno, os.strerror(eno))
ips = collections.OrderedDict()
def add_ip(adapter_name: str, ip: Optional[shared.IP]) -> None:
if adapter_name not in ips:
index = None # type: Optional[int]
try:
# Mypy errors on this when the Windows CI runs:
# error: Module has no attribute "if_nametoindex"
index = socket.if_nametoindex(adapter_name) # type: ignore
except (OSError, AttributeError):
pass
ips[adapter_name] = shared.Adapter(adapter_name, adapter_name, [], index=index)
if ip is not None:
ips[adapter_name].ips.append(ip)
while addr:
name = addr[0].ifa_name.decode(encoding='UTF-8')
ip_addr = shared.sockaddr_to_ip(addr[0].ifa_addr)
if ip_addr:
if addr[0].ifa_netmask and not addr[0].ifa_netmask[0].sa_familiy:
addr[0].ifa_netmask[0].sa_familiy = addr[0].ifa_addr[0].sa_familiy
netmask = shared.sockaddr_to_ip(addr[0].ifa_netmask)
if isinstance(netmask, tuple):
netmaskStr = str(netmask[0])
prefixlen = shared.ipv6_prefixlength(ipaddress.IPv6Address(netmaskStr))
else:
assert netmask is not None, f'sockaddr_to_ip({addr[0].ifa_netmask}) returned None'
netmaskStr = str('0.0.0.0/' + netmask)
prefixlen = ipaddress.IPv4Network(netmaskStr).prefixlen
ip = shared.IP(ip_addr, prefixlen, name)
add_ip(name, ip)
else:
if include_unconfigured:
add_ip(name, None)
addr = addr[0].ifa_next
libc.freeifaddrs(addr0)
return ips.values()
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