mirror of
https://github.com/GNS3/gns3-server
synced 2024-12-11 09:38:08 +00:00
246 lines
8.8 KiB
Python
246 lines
8.8 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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from .controller_error import ControllerError, ControllerNotFoundError
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from .link import Link
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class UDPLink(Link):
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def __init__(self, project, link_id=None):
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super().__init__(project, link_id=link_id)
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self._created = False
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self._link_data = []
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@property
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def debug_link_data(self):
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"""
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Use for the debug exports
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"""
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return self._link_data
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async def create(self):
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"""
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Create the link on the nodes
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"""
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node1 = self._nodes[0]["node"]
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adapter_number1 = self._nodes[0]["adapter_number"]
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port_number1 = self._nodes[0]["port_number"]
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node2 = self._nodes[1]["node"]
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adapter_number2 = self._nodes[1]["adapter_number"]
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port_number2 = self._nodes[1]["port_number"]
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# Get an IP allowing communication between both host
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try:
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(node1_host, node2_host) = await node1.compute.get_ip_on_same_subnet(node2.compute)
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except ValueError as e:
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raise ControllerError(f"Cannot get an IP address on same subnet: {e}")
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# Reserve a UDP port on both side
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response = await node1.compute.post(f"/projects/{self._project.id}/ports/udp")
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self._node1_port = response.json["udp_port"]
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response = await node2.compute.post(f"/projects/{self._project.id}/ports/udp")
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self._node2_port = response.json["udp_port"]
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node1_filters = {}
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node2_filters = {}
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filter_node = self._get_filter_node()
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if filter_node == node1:
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node1_filters = self.get_active_filters()
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elif filter_node == node2:
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node2_filters = self.get_active_filters()
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# Create the tunnel on both side
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self._link_data.append(
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{
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"lport": self._node1_port,
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"rhost": node2_host,
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"rport": self._node2_port,
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"type": "nio_udp",
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"filters": node1_filters,
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"suspend": self._suspended,
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}
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)
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await node1.post(f"/adapters/{adapter_number1}/ports/{port_number1}/nio", data=self._link_data[0], timeout=120)
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self._link_data.append(
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{
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"lport": self._node2_port,
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"rhost": node1_host,
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"rport": self._node1_port,
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"type": "nio_udp",
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"filters": node2_filters,
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"suspend": self._suspended,
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}
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)
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try:
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await node2.post(
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f"/adapters/{adapter_number2}/ports/{port_number2}/nio", data=self._link_data[1], timeout=120
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)
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except Exception as e:
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# We clean the first NIO
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await node1.delete(f"/adapters/{adapter_number1}/ports/{port_number1}/nio", timeout=120)
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raise e
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self._created = True
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async def update(self):
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"""
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Update the link on the nodes
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"""
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if len(self._link_data) == 0:
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return
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node1 = self._nodes[0]["node"]
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node2 = self._nodes[1]["node"]
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node1_filters = {}
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node2_filters = {}
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filter_node = self._get_filter_node()
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if filter_node == node1:
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node1_filters = self.get_active_filters()
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elif filter_node == node2:
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node2_filters = self.get_active_filters()
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adapter_number1 = self._nodes[0]["adapter_number"]
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port_number1 = self._nodes[0]["port_number"]
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self._link_data[0]["filters"] = node1_filters
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self._link_data[0]["suspend"] = self._suspended
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if node1.node_type not in ("ethernet_switch", "ethernet_hub"):
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await node1.put(
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f"/adapters/{adapter_number1}/ports/{port_number1}/nio", data=self._link_data[0], timeout=120
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)
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adapter_number2 = self._nodes[1]["adapter_number"]
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port_number2 = self._nodes[1]["port_number"]
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self._link_data[1]["filters"] = node2_filters
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self._link_data[1]["suspend"] = self._suspended
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if node2.node_type not in ("ethernet_switch", "ethernet_hub"):
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await node2.put(
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f"/adapters/{adapter_number2}/ports/{port_number2}/nio", data=self._link_data[1], timeout=221
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)
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async def delete(self):
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"""
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Delete the link and free the resources
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"""
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if not self._created:
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return
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try:
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node1 = self._nodes[0]["node"]
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adapter_number1 = self._nodes[0]["adapter_number"]
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port_number1 = self._nodes[0]["port_number"]
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except IndexError:
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return
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try:
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await node1.delete(f"/adapters/{adapter_number1}/ports/{port_number1}/nio", timeout=120)
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# If the node is already deleted (user selected multiple element and delete all in the same time)
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except ControllerNotFoundError:
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pass
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try:
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node2 = self._nodes[1]["node"]
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adapter_number2 = self._nodes[1]["adapter_number"]
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port_number2 = self._nodes[1]["port_number"]
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except IndexError:
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return
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try:
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await node2.delete(f"/adapters/{adapter_number2}/ports/{port_number2}/nio", timeout=120)
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# If the node is already deleted (user selected multiple element and delete all in the same time)
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except ControllerNotFoundError:
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pass
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await super().delete()
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async def reset(self):
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"""
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Reset the link.
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"""
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# recreate the link on the compute
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await self.delete()
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await self.create()
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async def start_capture(self, data_link_type="DLT_EN10MB", capture_file_name=None):
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"""
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Start capture on a link
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"""
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if not capture_file_name:
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capture_file_name = self.default_capture_file_name()
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self._capture_node = self._choose_capture_side()
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data = {"capture_file_name": capture_file_name, "data_link_type": data_link_type}
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await self._capture_node["node"].post(
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"/adapters/{adapter_number}/ports/{port_number}/capture/start".format(
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adapter_number=self._capture_node["adapter_number"], port_number=self._capture_node["port_number"]
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),
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data=data,
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)
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await super().start_capture(data_link_type=data_link_type, capture_file_name=capture_file_name)
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async def stop_capture(self):
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"""
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Stop capture on a link
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"""
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if self._capture_node:
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await self._capture_node["node"].post(
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"/adapters/{adapter_number}/ports/{port_number}/capture/stop".format(
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adapter_number=self._capture_node["adapter_number"], port_number=self._capture_node["port_number"]
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)
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)
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self._capture_node = None
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await super().stop_capture()
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def _choose_capture_side(self):
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"""
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Run capture on the best candidate.
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The ideal candidate is a node who on controller server and always
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running (capture will not be cut off)
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:returns: Node where the capture should run
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"""
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ALWAYS_RUNNING_NODES_TYPE = ("cloud", "nat", "ethernet_switch", "ethernet_hub")
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for node in self._nodes:
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if (
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node["node"].compute.id == "local"
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and node["node"].node_type in ALWAYS_RUNNING_NODES_TYPE
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and node["node"].status == "started"
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):
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return node
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for node in self._nodes:
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if node["node"].node_type in ALWAYS_RUNNING_NODES_TYPE and node["node"].status == "started":
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return node
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for node in self._nodes:
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if node["node"].compute.id == "local" and node["node"].status == "started":
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return node
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for node in self._nodes:
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if node["node"].node_type and node["node"].status == "started":
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return node
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raise ControllerError("Cannot capture because there is no running device on this link")
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async def node_updated(self, node):
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"""
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Called when a node member of the link is updated
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"""
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if self._capture_node and node == self._capture_node["node"] and node.status != "started":
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await self.stop_capture()
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