mirror of
https://github.com/GNS3/gns3-server.git
synced 2026-09-03 16:45:17 +03:00
4943567962
NAT now includes an 'interfaces' field in its response, filtered to contain only the mapped NAT interface (virbr0 on Linux, vmnet8 on macOS/Windows). This lets connected nodes discover the NAT subnet and gateway address without needing to list all host interfaces. The field format mirrors Cloud.asdict(): name, type, special, and ip_addresses list (both IPv4 and IPv6).
116 lines
4.4 KiB
Python
116 lines
4.4 KiB
Python
#!/usr/bin/env python
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#
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# Copyright (C) 2016 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 sys
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from .cloud import Cloud
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from ...error import NodeError
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import gns3server.utils.interfaces
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from gns3server.config import Config
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import logging
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log = logging.getLogger(__name__)
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class Nat(Cloud):
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"""
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A portable and pre-configured node allowing topologies to get a
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NAT access.
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"""
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def __init__(self, name, node_id, project, manager, ports=None):
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allowed_interfaces = Config.instance().settings.Server.allowed_interfaces
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if allowed_interfaces and isinstance(allowed_interfaces, str):
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allowed_interfaces = allowed_interfaces.split(',')
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if sys.platform.startswith("linux"):
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nat_interface = Config.instance().settings.Server.default_nat_interface
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if not nat_interface:
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nat_interface = "virbr0"
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if allowed_interfaces and nat_interface not in allowed_interfaces:
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raise NodeError("NAT interface {} is not allowed be used on this server. "
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"Please check the server configuration file.".format(nat_interface))
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if nat_interface not in [interface["name"] for interface in gns3server.utils.interfaces.interfaces()]:
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raise NodeError(f"NAT interface {nat_interface} is missing, please install libvirt")
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interface = nat_interface
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else:
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nat_interface = Config.instance().settings.Server.default_nat_interface
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if not nat_interface:
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nat_interface = "vmnet8"
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if allowed_interfaces and nat_interface not in allowed_interfaces:
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raise NodeError("NAT interface {} is not allowed be used on this server. "
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"Please check the server configuration file.".format(nat_interface))
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interfaces = list(
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filter(
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lambda x: nat_interface in x.lower(),
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[interface["name"] for interface in gns3server.utils.interfaces.interfaces()],
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)
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)
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if not len(interfaces):
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raise NodeError(
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f"NAT interface {nat_interface} is missing. "
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f"You need to install VMware or use the NAT node on GNS3 VM"
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)
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interface = interfaces[0] # take the first available interface containing the vmnet8 name
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log.info(f"NAT node '{name}' configured to use NAT interface '{interface}'")
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ports = [{"name": "nat0", "type": "ethernet", "interface": interface, "port_number": 0}]
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super().__init__(name, node_id, project, manager, ports=ports)
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@property
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def ports_mapping(self):
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return self._ports_mapping
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@ports_mapping.setter
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def ports_mapping(self, ports):
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# It's not allowed to change it
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pass
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@classmethod
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def is_supported(self):
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return True
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def asdict(self):
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nat_interface = self._ports_mapping[0].get("interface", "") if self._ports_mapping else ""
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host_interfaces = []
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network_interfaces = gns3server.utils.interfaces.interfaces()
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for interface in network_interfaces:
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if interface["name"] == nat_interface:
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host_interfaces.append(
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{
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"name": interface["name"],
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"type": interface["type"],
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"special": interface["special"],
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"ip_addresses": interface.get("ip_addresses", []),
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}
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)
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break
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return {
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"name": self.name,
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"usage": self.usage,
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"node_id": self.id,
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"project_id": self.project.id,
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"status": "started",
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"ports_mapping": self.ports_mapping,
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"interfaces": host_interfaces,
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}
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