diff --git a/README.md b/README.md
index 7b6c36e..c450cd4 100755
--- a/README.md
+++ b/README.md
@@ -341,8 +341,8 @@ projects:
 - [Curve25519.py](https://gist.github.com/nickovs/cc3c22d15f239a2640c185035c06f8a3#file-curve25519-py) by [Nicko van Someren](https://gist.github.com/nickovs), *Public Domain*
 - [I2Plib](https://github.com/l-n-s/i2plib) by [Viktor Villainov](https://github.com/l-n-s)
 - [PySerial](https://github.com/pyserial/pyserial) by Chris Liechti, *BSD License*
-- [Netifaces](https://github.com/al45tair/netifaces) by [Alastair Houghton](https://github.com/al45tair), *MIT License*
 - [Configobj](https://github.com/DiffSK/configobj) by Michael Foord, Nicola Larosa, Rob Dennis & Eli Courtwright, *BSD License*
 - [Six](https://github.com/benjaminp/six) by [Benjamin Peterson](https://github.com/benjaminp), *MIT License*
 - [Umsgpack.py](https://github.com/vsergeev/u-msgpack-python) by [Ivan A. Sergeev](https://github.com/vsergeev)
+- [ifaddr](https://github.com/pydron/ifaddr) by [Pydron](https://github.com/pydron), *MIT License*
 - [Python](https://www.python.org)
diff --git a/RNS/vendor/ifaddr/__init__.py b/RNS/vendor/ifaddr/__init__.py
new file mode 100644
index 0000000..65c49fc
--- /dev/null
+++ b/RNS/vendor/ifaddr/__init__.py
@@ -0,0 +1,33 @@
+# 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
+
+from ifaddr._shared import Adapter, IP
+
+if os.name == "nt":
+    from ifaddr._win32 import get_adapters
+elif os.name == "posix":
+    from ifaddr._posix import get_adapters
+else:
+    raise RuntimeError("Unsupported Operating System: %s" % os.name)
+
+__all__ = ['Adapter', 'IP', 'get_adapters']
diff --git a/RNS/vendor/ifaddr/_posix.py b/RNS/vendor/ifaddr/_posix.py
new file mode 100644
index 0000000..5fb0d18
--- /dev/null
+++ b/RNS/vendor/ifaddr/_posix.py
@@ -0,0 +1,96 @@
+# 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()
diff --git a/RNS/vendor/ifaddr/_shared.py b/RNS/vendor/ifaddr/_shared.py
new file mode 100644
index 0000000..40f6edd
--- /dev/null
+++ b/RNS/vendor/ifaddr/_shared.py
@@ -0,0 +1,199 @@
+# 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 ctypes
+import socket
+import ipaddress
+import platform
+
+from typing import List, Optional, Tuple, Union
+
+
+class Adapter(object):
+    """
+    Represents a network interface device controller (NIC), such as a
+    network card. An adapter can have multiple IPs.
+
+    On Linux aliasing (multiple IPs per physical NIC) is implemented
+    by creating 'virtual' adapters, each represented by an instance
+    of this class. Each of those 'virtual' adapters can have both
+    a IPv4 and an IPv6 IP address.
+    """
+
+    def __init__(self, name: str, nice_name: str, ips: List['IP'], index: Optional[int] = None) -> None:
+
+        #: Unique name that identifies the adapter in the system.
+        #: On Linux this is of the form of `eth0` or `eth0:1`, on
+        #: Windows it is a UUID in string representation, such as
+        #: `{846EE342-7039-11DE-9D20-806E6F6E6963}`.
+        self.name = name
+
+        #: Human readable name of the adpater. On Linux this
+        #: is currently the same as :attr:`name`. On Windows
+        #: this is the name of the device.
+        self.nice_name = nice_name
+
+        #: List of :class:`ifaddr.IP` instances in the order they were
+        #: reported by the system.
+        self.ips = ips
+
+        #: Adapter index as used by some API (e.g. IPv6 multicast group join).
+        self.index = index
+
+    def __repr__(self) -> str:
+        return "Adapter(name={name}, nice_name={nice_name}, ips={ips}, index={index})".format(
+            name=repr(self.name), nice_name=repr(self.nice_name), ips=repr(self.ips), index=repr(self.index)
+        )
+
+
+# Type of an IPv4 address (a string in "xxx.xxx.xxx.xxx" format)
+_IPv4Address = str
+
+# Type of an IPv6 address (a three-tuple `(ip, flowinfo, scope_id)`)
+_IPv6Address = Tuple[str, int, int]
+
+
+class IP(object):
+    """
+    Represents an IP address of an adapter.
+    """
+
+    def __init__(self, ip: Union[_IPv4Address, _IPv6Address], network_prefix: int, nice_name: str) -> None:
+
+        #: IP address. For IPv4 addresses this is a string in
+        #: "xxx.xxx.xxx.xxx" format. For IPv6 addresses this
+        #: is a three-tuple `(ip, flowinfo, scope_id)`, where
+        #: `ip` is a string in the usual collon separated
+        #: hex format.
+        self.ip = ip
+
+        #: Number of bits of the IP that represent the
+        #: network. For a `255.255.255.0` netmask, this
+        #: number would be `24`.
+        self.network_prefix = network_prefix
+
+        #: Human readable name for this IP.
+        #: On Linux is this currently the same as the adapter name.
+        #: On Windows this is the name of the network connection
+        #: as configured in the system control panel.
+        self.nice_name = nice_name
+
+    @property
+    def is_IPv4(self) -> bool:
+        """
+        Returns `True` if this IP is an IPv4 address and `False`
+        if it is an IPv6 address.
+        """
+        return not isinstance(self.ip, tuple)
+
+    @property
+    def is_IPv6(self) -> bool:
+        """
+        Returns `True` if this IP is an IPv6 address and `False`
+        if it is an IPv4 address.
+        """
+        return isinstance(self.ip, tuple)
+
+    def __repr__(self) -> str:
+        return "IP(ip={ip}, network_prefix={network_prefix}, nice_name={nice_name})".format(
+            ip=repr(self.ip), network_prefix=repr(self.network_prefix), nice_name=repr(self.nice_name)
+        )
+
+
+if platform.system() == "Darwin" or "BSD" in platform.system():
+
+    # BSD derived systems use marginally different structures
+    # than either Linux or Windows.
+    # I still keep it in `shared` since we can use
+    # both structures equally.
+
+    class sockaddr(ctypes.Structure):
+        _fields_ = [
+            ('sa_len', ctypes.c_uint8),
+            ('sa_familiy', ctypes.c_uint8),
+            ('sa_data', ctypes.c_uint8 * 14),
+        ]
+
+    class sockaddr_in(ctypes.Structure):
+        _fields_ = [
+            ('sa_len', ctypes.c_uint8),
+            ('sa_familiy', ctypes.c_uint8),
+            ('sin_port', ctypes.c_uint16),
+            ('sin_addr', ctypes.c_uint8 * 4),
+            ('sin_zero', ctypes.c_uint8 * 8),
+        ]
+
+    class sockaddr_in6(ctypes.Structure):
+        _fields_ = [
+            ('sa_len', ctypes.c_uint8),
+            ('sa_familiy', ctypes.c_uint8),
+            ('sin6_port', ctypes.c_uint16),
+            ('sin6_flowinfo', ctypes.c_uint32),
+            ('sin6_addr', ctypes.c_uint8 * 16),
+            ('sin6_scope_id', ctypes.c_uint32),
+        ]
+
+else:
+
+    class sockaddr(ctypes.Structure):  # type: ignore
+        _fields_ = [('sa_familiy', ctypes.c_uint16), ('sa_data', ctypes.c_uint8 * 14)]
+
+    class sockaddr_in(ctypes.Structure):  # type: ignore
+        _fields_ = [
+            ('sin_familiy', ctypes.c_uint16),
+            ('sin_port', ctypes.c_uint16),
+            ('sin_addr', ctypes.c_uint8 * 4),
+            ('sin_zero', ctypes.c_uint8 * 8),
+        ]
+
+    class sockaddr_in6(ctypes.Structure):  # type: ignore
+        _fields_ = [
+            ('sin6_familiy', ctypes.c_uint16),
+            ('sin6_port', ctypes.c_uint16),
+            ('sin6_flowinfo', ctypes.c_uint32),
+            ('sin6_addr', ctypes.c_uint8 * 16),
+            ('sin6_scope_id', ctypes.c_uint32),
+        ]
+
+
+def sockaddr_to_ip(sockaddr_ptr: 'ctypes.pointer[sockaddr]') -> Optional[Union[_IPv4Address, _IPv6Address]]:
+    if sockaddr_ptr:
+        if sockaddr_ptr[0].sa_familiy == socket.AF_INET:
+            ipv4 = ctypes.cast(sockaddr_ptr, ctypes.POINTER(sockaddr_in))
+            ippacked = bytes(bytearray(ipv4[0].sin_addr))
+            ip = str(ipaddress.ip_address(ippacked))
+            return ip
+        elif sockaddr_ptr[0].sa_familiy == socket.AF_INET6:
+            ipv6 = ctypes.cast(sockaddr_ptr, ctypes.POINTER(sockaddr_in6))
+            flowinfo = ipv6[0].sin6_flowinfo
+            ippacked = bytes(bytearray(ipv6[0].sin6_addr))
+            ip = str(ipaddress.ip_address(ippacked))
+            scope_id = ipv6[0].sin6_scope_id
+            return (ip, flowinfo, scope_id)
+    return None
+
+
+def ipv6_prefixlength(address: ipaddress.IPv6Address) -> int:
+    prefix_length = 0
+    for i in range(address.max_prefixlen):
+        if int(address) >> i & 1:
+            prefix_length = prefix_length + 1
+    return prefix_length
diff --git a/RNS/vendor/ifaddr/_win32.py b/RNS/vendor/ifaddr/_win32.py
new file mode 100644
index 0000000..20b55ad
--- /dev/null
+++ b/RNS/vendor/ifaddr/_win32.py
@@ -0,0 +1,145 @@
+# 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 ctypes
+from ctypes import wintypes
+from typing import Iterable, List
+
+import ifaddr._shared as shared
+
+NO_ERROR = 0
+ERROR_BUFFER_OVERFLOW = 111
+MAX_ADAPTER_NAME_LENGTH = 256
+MAX_ADAPTER_DESCRIPTION_LENGTH = 128
+MAX_ADAPTER_ADDRESS_LENGTH = 8
+AF_UNSPEC = 0
+
+
+class SOCKET_ADDRESS(ctypes.Structure):
+    _fields_ = [('lpSockaddr', ctypes.POINTER(shared.sockaddr)), ('iSockaddrLength', wintypes.INT)]
+
+
+class IP_ADAPTER_UNICAST_ADDRESS(ctypes.Structure):
+    pass
+
+
+IP_ADAPTER_UNICAST_ADDRESS._fields_ = [
+    ('Length', wintypes.ULONG),
+    ('Flags', wintypes.DWORD),
+    ('Next', ctypes.POINTER(IP_ADAPTER_UNICAST_ADDRESS)),
+    ('Address', SOCKET_ADDRESS),
+    ('PrefixOrigin', ctypes.c_uint),
+    ('SuffixOrigin', ctypes.c_uint),
+    ('DadState', ctypes.c_uint),
+    ('ValidLifetime', wintypes.ULONG),
+    ('PreferredLifetime', wintypes.ULONG),
+    ('LeaseLifetime', wintypes.ULONG),
+    ('OnLinkPrefixLength', ctypes.c_uint8),
+]
+
+
+class IP_ADAPTER_ADDRESSES(ctypes.Structure):
+    pass
+
+
+IP_ADAPTER_ADDRESSES._fields_ = [
+    ('Length', wintypes.ULONG),
+    ('IfIndex', wintypes.DWORD),
+    ('Next', ctypes.POINTER(IP_ADAPTER_ADDRESSES)),
+    ('AdapterName', ctypes.c_char_p),
+    ('FirstUnicastAddress', ctypes.POINTER(IP_ADAPTER_UNICAST_ADDRESS)),
+    ('FirstAnycastAddress', ctypes.c_void_p),
+    ('FirstMulticastAddress', ctypes.c_void_p),
+    ('FirstDnsServerAddress', ctypes.c_void_p),
+    ('DnsSuffix', ctypes.c_wchar_p),
+    ('Description', ctypes.c_wchar_p),
+    ('FriendlyName', ctypes.c_wchar_p),
+]
+
+
+iphlpapi = ctypes.windll.LoadLibrary("Iphlpapi")  # type: ignore
+
+
+def enumerate_interfaces_of_adapter(
+    nice_name: str, address: IP_ADAPTER_UNICAST_ADDRESS
+) -> Iterable[shared.IP]:
+
+    # Iterate through linked list and fill list
+    addresses = []  # type: List[IP_ADAPTER_UNICAST_ADDRESS]
+    while True:
+        addresses.append(address)
+        if not address.Next:
+            break
+        address = address.Next[0]
+
+    for address in addresses:
+        ip = shared.sockaddr_to_ip(address.Address.lpSockaddr)
+        assert ip is not None, f'sockaddr_to_ip({address.Address.lpSockaddr}) returned None'
+        network_prefix = address.OnLinkPrefixLength
+        yield shared.IP(ip, network_prefix, nice_name)
+
+
+def get_adapters(include_unconfigured: bool = False) -> Iterable[shared.Adapter]:
+
+    # Call GetAdaptersAddresses() with error and buffer size handling
+
+    addressbuffersize = wintypes.ULONG(15 * 1024)
+    retval = ERROR_BUFFER_OVERFLOW
+    while retval == ERROR_BUFFER_OVERFLOW:
+        addressbuffer = ctypes.create_string_buffer(addressbuffersize.value)
+        retval = iphlpapi.GetAdaptersAddresses(
+            wintypes.ULONG(AF_UNSPEC),
+            wintypes.ULONG(0),
+            None,
+            ctypes.byref(addressbuffer),
+            ctypes.byref(addressbuffersize),
+        )
+    if retval != NO_ERROR:
+        raise ctypes.WinError()  # type: ignore
+
+    # Iterate through adapters fill array
+    address_infos = []  # type: List[IP_ADAPTER_ADDRESSES]
+    address_info = IP_ADAPTER_ADDRESSES.from_buffer(addressbuffer)
+    while True:
+        address_infos.append(address_info)
+        if not address_info.Next:
+            break
+        address_info = address_info.Next[0]
+
+    # Iterate through unicast addresses
+    result = []  # type: List[shared.Adapter]
+    for adapter_info in address_infos:
+
+        # We don't expect non-ascii characters here, so encoding shouldn't matter
+        name = adapter_info.AdapterName.decode()
+        nice_name = adapter_info.Description
+        index = adapter_info.IfIndex
+
+        if adapter_info.FirstUnicastAddress:
+            ips = enumerate_interfaces_of_adapter(
+                adapter_info.FriendlyName, adapter_info.FirstUnicastAddress[0]
+            )
+            ips = list(ips)
+            result.append(shared.Adapter(name, nice_name, ips, index=index))
+        elif include_unconfigured:
+            result.append(shared.Adapter(name, nice_name, [], index=index))
+
+    return result
diff --git a/RNS/vendor/ifaddr/netifaces.py b/RNS/vendor/ifaddr/netifaces.py
new file mode 100644
index 0000000..d6b189c
--- /dev/null
+++ b/RNS/vendor/ifaddr/netifaces.py
@@ -0,0 +1,36 @@
+# netifaces compatibility layer
+
+import ifaddr
+import socket
+
+from typing import List
+
+AF_INET6 = socket.AF_INET6.value
+AF_INET = socket.AF_INET.value
+
+def interfaces() -> List[str]:
+    adapters = ifaddr.get_adapters(include_unconfigured=True)
+    return [a.name for a in adapters]
+
+def ifaddresses(ifname) -> dict:
+    adapters = ifaddr.get_adapters(include_unconfigured=True)
+    ifa = {}
+    for a in adapters:
+        if a.name == ifname:
+            ipv4s = []
+            ipv6s = []
+            for ip in a.ips:
+                t = {}
+                if ip.is_IPv4:
+                    t["addr"] = ip.ip
+                    ipv4s.append(t)
+                if ip.is_IPv6:
+                    t["addr"] = ip.ip[0]
+                    ipv6s.append(t)
+
+            if len(ipv4s) > 0:
+                ifa[AF_INET] = ipv4s
+            if len(ipv6s) > 0:
+                ifa[AF_INET6] = ipv6s
+
+    return ifa
\ No newline at end of file
diff --git a/RNS/vendor/ifaddr/py.typed b/RNS/vendor/ifaddr/py.typed
new file mode 100644
index 0000000..e69de29
diff --git a/RNS/vendor/ifaddr/test_ifaddr.py b/RNS/vendor/ifaddr/test_ifaddr.py
new file mode 100644
index 0000000..e0f6abb
--- /dev/null
+++ b/RNS/vendor/ifaddr/test_ifaddr.py
@@ -0,0 +1,48 @@
+# Copyright (C) 2015 Stefan C. Mueller
+
+import unittest
+
+import pytest
+
+import ifaddr
+import ifaddr.netifaces
+
+
+try:
+    import netifaces
+except ImportError:
+    skip_netifaces = True
+else:
+    skip_netifaces = False
+
+
+class TestIfaddr(unittest.TestCase):
+    """
+    Unittests for :mod:`ifaddr`.
+
+    There isn't much unit-testing that can be done without making assumptions
+    on the system or mocking of operating system APIs. So this just contains
+    a sanity check for the moment.
+    """
+
+    def test_get_adapters_contains_localhost(self) -> None:
+
+        found = False
+        adapters = ifaddr.get_adapters()
+        for adapter in adapters:
+            for ip in adapter.ips:
+                if ip.ip == "127.0.0.1":
+                    found = True
+
+        self.assertTrue(found, "No adapter has IP 127.0.0.1: %s" % str(adapters))
+
+
+@pytest.mark.skipif(skip_netifaces, reason='netifaces not installed')
+def test_netifaces_compatibility() -> None:
+    interfaces = ifaddr.netifaces.interfaces()
+    assert interfaces == netifaces.interfaces()
+    # TODO: implement those as well
+    # for interface in interfaces:
+    #     print(interface)
+    #     assert ifaddr.netifaces.ifaddresses(interface) == netifaces.ifaddresses(interface)
+    # assert ifaddr.netifaces.gateways() == netifaces.gateways()