gns3-server/gns3server/utils/interfaces.py
Julien Duponchelle da240f21ba Apply pep8 fix
2015-11-09 12:28:00 +01:00

166 lines
6.4 KiB
Python

# -*- coding: utf-8 -*-
#
# Copyright (C) 2014 GNS3 Technologies Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import sys
import aiohttp
import socket
import struct
import psutil
import logging
log = logging.getLogger(__name__)
def _get_windows_interfaces_from_registry():
import winreg
# HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces
interfaces = []
try:
hkey = winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, r"SOFTWARE\Microsoft\Windows NT\CurrentVersion\NetworkCards")
for index in range(winreg.QueryInfoKey(hkey)[0]):
network_card_id = winreg.EnumKey(hkey, index)
hkeycard = winreg.OpenKey(hkey, network_card_id)
guid, _ = winreg.QueryValueEx(hkeycard, "ServiceName")
netcard, _ = winreg.QueryValueEx(hkeycard, "Description")
connection = r"SYSTEM\CurrentControlSet\Control\Network\{4D36E972-E325-11CE-BFC1-08002BE10318}" + "\{}\Connection".format(guid)
hkeycon = winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, connection)
name, _ = winreg.QueryValueEx(hkeycon, "Name")
interface = r"SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{}".format(guid)
hkeyinterface = winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, interface)
is_dhcp_enabled, _ = winreg.QueryValueEx(hkeyinterface, "EnableDHCP")
if is_dhcp_enabled:
ip_address, _ = winreg.QueryValueEx(hkeyinterface, "DhcpIPAddress")
else:
ip_address, _ = winreg.QueryValueEx(hkeyinterface, "IPAddress")
if ip_address:
# get the first IPv4 address only
ip_address = ip_address[0]
npf_interface = "\\Device\\NPF_{guid}".format(guid=guid)
interfaces.append({"id": npf_interface,
"name": name,
"ip_address": ip_address,
"netcard": netcard})
winreg.CloseKey(hkeyinterface)
winreg.CloseKey(hkeycon)
winreg.CloseKey(hkeycard)
winreg.CloseKey(hkey)
except OSError as e:
log.error("could not read registry information: {}".format(e))
return interfaces
def get_windows_interfaces():
"""
Get Windows interfaces.
:returns: list of windows interfaces
"""
import win32com.client
import pywintypes
interfaces = []
try:
locator = win32com.client.Dispatch("WbemScripting.SWbemLocator")
service = locator.ConnectServer(".", "root\cimv2")
# more info on Win32_NetworkAdapter: http://msdn.microsoft.com/en-us/library/aa394216%28v=vs.85%29.aspx
for adapter in service.InstancesOf("Win32_NetworkAdapter"):
if adapter.NetConnectionStatus == 2 or adapter.NetConnectionStatus == 7:
# adapter is connected or media disconnected
ip_address = ""
for network_config in service.InstancesOf("Win32_NetworkAdapterConfiguration"):
if network_config.InterfaceIndex == adapter.InterfaceIndex:
if network_config.IPAddress:
# get the first IPv4 address only
ip_address = network_config.IPAddress[0]
break
npf_interface = "\\Device\\NPF_{guid}".format(guid=adapter.GUID)
interfaces.append({"id": npf_interface,
"name": adapter.NetConnectionID,
"ip_address": ip_address,
"netcard": adapter.name})
except (AttributeError, pywintypes.com_error):
log.warn("Could not use the COM service to retrieve interface info, trying using the registry...")
return _get_windows_interfaces_from_registry()
return interfaces
def is_interface_up(interface):
"""
Checks if an interface is up.
:param interface: interface name
:returns: boolean
"""
if sys.platform.startswith("linux"):
if interface not in psutil.net_if_addrs():
return False
import fcntl
SIOCGIFFLAGS = 0x8913
try:
with socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as s:
result = fcntl.ioctl(s.fileno(), SIOCGIFFLAGS, interface + '\0' * 256)
flags, = struct.unpack('H', result[16:18])
if flags & 1: # check if the up bit is set
return True
return False
except OSError as e:
raise aiohttp.web.HTTPInternalServerError(text="Exception when checking if {} is up: {}".format(interface, e))
else:
# TODO: Windows & OSX support
return True
def interfaces():
"""
Gets the network interfaces on this server.
:returns: list of network interfaces
"""
results = []
if not sys.platform.startswith("win"):
for interface in sorted(psutil.net_if_addrs().keys()):
ip_address = ""
for addr in psutil.net_if_addrs()[interface]:
# get the first available IPv4 address only
if addr.family == socket.AF_INET:
ip_address = addr.address
break
results.append({"id": interface,
"name": interface,
"ip_address": ip_address})
else:
try:
results = get_windows_interfaces()
except ImportError:
message = "pywin32 module is not installed, please install it on the server to get the available interface names"
raise aiohttp.web.HTTPInternalServerError(text=message)
except Exception as e:
log.error("uncaught exception {type}".format(type=type(e)), exc_info=1)
raise aiohttp.web.HTTPInternalServerError(text="uncaught exception: {}".format(e))
return results