mirror of
https://github.com/GNS3/gns3-server
synced 2024-12-26 16:58:28 +00:00
255 lines
8.8 KiB
Python
255 lines
8.8 KiB
Python
#
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# Copyright (C) 2014 GNS3 Technologies Inc.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import os
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import sys
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import socket
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import struct
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import psutil
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from gns3server.compute.compute_error import ComputeError
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from gns3server.config import Config
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if psutil.version_info < (3, 0, 0):
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raise Exception(
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"psutil version should >= 3.0.0. If you are under Ubuntu/Debian install gns3 via apt instead of pip"
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)
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import logging
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log = logging.getLogger(__name__)
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def _get_windows_interfaces_from_registry():
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import winreg
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# HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces
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interfaces = []
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try:
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hkey = winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, r"SOFTWARE\Microsoft\Windows NT\CurrentVersion\NetworkCards")
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for index in range(winreg.QueryInfoKey(hkey)[0]):
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network_card_id = winreg.EnumKey(hkey, index)
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hkeycard = winreg.OpenKey(hkey, network_card_id)
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guid, _ = winreg.QueryValueEx(hkeycard, "ServiceName")
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netcard, _ = winreg.QueryValueEx(hkeycard, "Description")
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connection = (
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r"SYSTEM\CurrentControlSet\Control\Network\{4D36E972-E325-11CE-BFC1-08002BE10318}"
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+ fr"\{guid}\Connection"
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)
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hkeycon = winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, connection)
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name, _ = winreg.QueryValueEx(hkeycon, "Name")
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interface = fr"SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{guid}"
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hkeyinterface = winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, interface)
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is_dhcp_enabled, _ = winreg.QueryValueEx(hkeyinterface, "EnableDHCP")
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if is_dhcp_enabled:
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ip_address, _ = winreg.QueryValueEx(hkeyinterface, "DhcpIPAddress")
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netmask, _ = winreg.QueryValueEx(hkeyinterface, "DhcpSubnetMask")
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else:
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ip_address, _ = winreg.QueryValueEx(hkeyinterface, "IPAddress")
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netmask, _ = winreg.QueryValueEx(hkeyinterface, "SubnetMask")
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if ip_address:
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# get the first IPv4 address only
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ip_address = ip_address[0]
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npf_interface = "\\Device\\NPF_{guid}".format(guid=guid)
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interfaces.append(
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{
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"id": npf_interface,
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"name": name,
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"ip_address": ip_address,
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"mac_address": "", # TODO: find MAC address in registry
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"netcard": netcard,
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"netmask": netmask,
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"type": "ethernet",
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}
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)
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winreg.CloseKey(hkeyinterface)
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winreg.CloseKey(hkeycon)
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winreg.CloseKey(hkeycard)
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winreg.CloseKey(hkey)
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except OSError as e:
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log.error(f"could not read registry information: {e}")
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return interfaces
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def get_windows_interfaces():
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"""
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Get Windows interfaces.
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:returns: list of windows interfaces
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"""
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import win32com.client
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import pywintypes
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interfaces = []
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try:
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locator = win32com.client.Dispatch("WbemScripting.SWbemLocator")
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service = locator.ConnectServer(".", r"root\cimv2")
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network_configs = service.InstancesOf("Win32_NetworkAdapterConfiguration")
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# more info on Win32_NetworkAdapter: http://msdn.microsoft.com/en-us/library/aa394216%28v=vs.85%29.aspx
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for adapter in service.InstancesOf("Win32_NetworkAdapter"):
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if adapter.NetConnectionStatus == 2 or adapter.NetConnectionStatus == 7:
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# adapter is connected or media disconnected
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ip_address = ""
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netmask = ""
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for network_config in network_configs:
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if network_config.InterfaceIndex == adapter.InterfaceIndex:
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if network_config.IPAddress:
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# get the first IPv4 address only
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ip_address = network_config.IPAddress[0]
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netmask = network_config.IPSubnet[0]
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break
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npf_interface = "\\Device\\NPF_{guid}".format(guid=adapter.GUID)
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interfaces.append(
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{
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"id": npf_interface,
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"name": adapter.NetConnectionID,
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"ip_address": ip_address,
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"mac_address": adapter.MACAddress,
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"netcard": adapter.name,
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"netmask": netmask,
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"type": "ethernet",
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}
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)
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except (AttributeError, pywintypes.com_error):
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log.warning("Could not use the COM service to retrieve interface info, trying using the registry...")
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return _get_windows_interfaces_from_registry()
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return interfaces
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def has_netmask(interface_name):
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"""
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Checks if an interface has a netmask.
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:param interface: interface name
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:returns: boolean
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"""
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for interface in interfaces():
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if interface["name"] == interface_name:
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if interface["netmask"] and len(interface["netmask"]) > 0:
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return True
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return False
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return False
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def is_interface_up(interface):
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"""
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Checks if an interface is up.
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:param interface: interface name
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:returns: boolean
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"""
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if sys.platform.startswith("linux"):
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if interface not in psutil.net_if_addrs():
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return False
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import fcntl
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SIOCGIFFLAGS = 0x8913
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try:
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with socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as s:
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result = fcntl.ioctl(s.fileno(), SIOCGIFFLAGS, interface + "\0" * 256)
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(flags,) = struct.unpack("H", result[16:18])
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if flags & 1: # check if the up bit is set
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return True
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return False
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except OSError as e:
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raise ComputeError(f"Exception when checking if {interface} is up: {e}")
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else:
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# TODO: Windows & OSX support
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return True
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def is_interface_bridge(interface):
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"""
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:returns: True if interface is a bridge
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"""
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return os.path.exists(os.path.join("/sys/class/net/", interface, "bridge"))
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def interfaces():
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"""
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Gets the network interfaces on this server.
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:returns: list of network interfaces
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"""
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results = []
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allowed_interfaces = Config.instance().settings.Server.allowed_interfaces
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net_if_addrs = psutil.net_if_addrs()
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for interface in sorted(net_if_addrs.keys()):
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if allowed_interfaces and interface not in allowed_interfaces and not interface.startswith("gns3tap"):
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log.warning(f"Interface '{interface}' is not allowed to be used on this server")
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continue
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ip_address = ""
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mac_address = ""
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netmask = ""
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interface_type = "ethernet"
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for addr in net_if_addrs[interface]:
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# get the first available IPv4 address only
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if addr.family == socket.AF_INET:
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ip_address = addr.address
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netmask = addr.netmask
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if addr.family == psutil.AF_LINK:
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mac_address = addr.address
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if interface.startswith("tap"):
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# found no way to reliably detect a TAP interface
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interface_type = "tap"
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results.append(
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{
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"id": interface,
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"name": interface,
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"ip_address": ip_address,
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"netmask": netmask,
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"mac_address": mac_address,
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"type": interface_type,
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}
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)
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# This interface have special behavior
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for result in results:
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result["special"] = False
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for special_interface in (
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"lo",
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"vmnet",
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"vboxnet",
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"docker",
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"lxcbr",
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"virbr",
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"ovs-system",
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"veth",
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"fw",
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"p2p",
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"bridge",
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"vmware",
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"virtualbox",
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"gns3",
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):
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if result["name"].lower().startswith(special_interface):
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result["special"] = True
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for special_interface in "-nic":
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if result["name"].lower().endswith(special_interface):
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result["special"] = True
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return results
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