# # Copyright (C) 2016 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 . """ API routes for links. """ import multidict import aiohttp from fastapi import APIRouter, Depends, Request, status from fastapi.responses import StreamingResponse from fastapi.encoders import jsonable_encoder from typing import List from uuid import UUID from gns3server.controller import Controller from gns3server.controller.controller_error import ControllerError from gns3server.controller.link import Link from gns3server.utils.http_client import HTTPClient from gns3server import schemas import logging log = logging.getLogger(__name__) responses = {404: {"model": schemas.ErrorMessage, "description": "Could not find project or link"}} router = APIRouter(responses=responses) async def dep_link(project_id: UUID, link_id: UUID) -> Link: """ Dependency to retrieve a link. """ project = await Controller.instance().get_loaded_project(str(project_id)) link = project.get_link(str(link_id)) return link @router.get("", response_model=List[schemas.Link], response_model_exclude_unset=True) async def get_links(project_id: UUID) -> List[schemas.Link]: """ Return all links for a given project. """ project = await Controller.instance().get_loaded_project(str(project_id)) return [v.asdict() for v in project.links.values()] @router.post( "", status_code=status.HTTP_201_CREATED, response_model=schemas.Link, responses={ 404: {"model": schemas.ErrorMessage, "description": "Could not find project"}, 409: {"model": schemas.ErrorMessage, "description": "Could not create link"}, }, ) async def create_link(project_id: UUID, link_data: schemas.LinkCreate) -> schemas.Link: """ Create a new link. """ project = await Controller.instance().get_loaded_project(str(project_id)) link = await project.add_link() link_data = jsonable_encoder(link_data, exclude_unset=True) if "filters" in link_data: await link.update_filters(link_data["filters"]) if "suspend" in link_data: await link.update_suspend(link_data["suspend"]) try: for node in link_data["nodes"]: await link.add_node( project.get_node(node["node_id"]), node.get("adapter_number", 0), node.get("port_number", 0), label=node.get("label"), ) except ControllerError as e: await project.delete_link(link.id) raise e return link.asdict() @router.get("/{link_id}/available_filters") async def get_filters(link: Link = Depends(dep_link)) -> List[dict]: """ Return all filters available for a given link. """ return link.available_filters() @router.get("/{link_id}", response_model=schemas.Link, response_model_exclude_unset=True) async def get_link(link: Link = Depends(dep_link)) -> schemas.Link: """ Return a link. """ return link.asdict() @router.put("/{link_id}", response_model=schemas.Link, response_model_exclude_unset=True) async def update_link(link_data: schemas.LinkUpdate, link: Link = Depends(dep_link)) -> schemas.Link: """ Update a link. """ link_data = jsonable_encoder(link_data, exclude_unset=True) if "filters" in link_data: await link.update_filters(link_data["filters"]) if "suspend" in link_data: await link.update_suspend(link_data["suspend"]) if "nodes" in link_data: await link.update_nodes(link_data["nodes"]) return link.asdict() @router.delete("/{link_id}", status_code=status.HTTP_204_NO_CONTENT) async def delete_link(project_id: UUID, link: Link = Depends(dep_link)) -> None: """ Delete a link. """ project = await Controller.instance().get_loaded_project(str(project_id)) await project.delete_link(link.id) @router.post("/{link_id}/reset", response_model=schemas.Link) async def reset_link(link: Link = Depends(dep_link)) -> schemas.Link: """ Reset a link. """ await link.reset() return link.asdict() @router.post("/{link_id}/capture/start", status_code=status.HTTP_201_CREATED, response_model=schemas.Link) async def start_capture(capture_data: dict, link: Link = Depends(dep_link)) -> schemas.Link: """ Start packet capture on the link. """ await link.start_capture( data_link_type=capture_data.get("data_link_type", "DLT_EN10MB"), capture_file_name=capture_data.get("capture_file_name"), ) return link.asdict() @router.post("/{link_id}/capture/stop", status_code=status.HTTP_204_NO_CONTENT) async def stop_capture(link: Link = Depends(dep_link)) -> None: """ Stop packet capture on the link. """ await link.stop_capture() @router.get("/{link_id}/capture/stream") async def stream_pcap(request: Request, link: Link = Depends(dep_link)) -> StreamingResponse: """ Stream the PCAP capture file from compute. """ if not link.capturing: raise ControllerError("This link has no active packet capture") compute = link.compute pcap_streaming_url = link.pcap_streaming_url() headers = multidict.MultiDict(request.headers) headers["Host"] = compute.host headers["Router-Host"] = request.client.host body = await request.body() async def compute_pcap_stream(): try: async with HTTPClient.request(request.method, pcap_streaming_url, timeout=None, data=body) as response: async for data in response.content.iter_any(): if not data: break yield data except aiohttp.ClientError as e: raise ControllerError(f"Client error received when receiving pcap stream from compute: {e}") return StreamingResponse(compute_pcap_stream(), media_type="application/vnd.tcpdump.pcap")