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Method for start / stop capture on a link

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Ref https://github.com/GNS3/gns3-gui/issues/1117
This commit is contained in:
Julien Duponchelle 2016-04-21 12:14:09 +02:00
parent 78a9785819
commit 04a1b2df3b
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GPG Key ID: CE8B29639E07F5E8
9 changed files with 230 additions and 18 deletions
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35
gns3server/controller/link.py
View File

@ -15,16 +15,18 @@
# 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 re
import uuid
import asyncio
class Link:
def __init__(self, project):
def __init__(self, project, data_link_type="DLT_EN10MB"):
self._id = str(uuid.uuid4())
self._vms = []
self._project = project
self._data_link_type = data_link_type
@asyncio.coroutine
def addVM(self, vm, adapter_number, port_number):
@ -51,6 +53,35 @@ class Link:
"""
raise NotImplementedError
@asyncio.coroutine
def start_capture(self):
"""
Start capture on the link
:returns: Capture object
"""
raise NotImplementedError
@asyncio.coroutine
def stop_capture(self):
"""
Stop capture on the link
"""
raise NotImplementedError
def capture_file_name(self):
"""
:returns: File name for a capture on this link
"""
capture_file_name = "{}_{}-{}_to_{}_{}-{}".format(
self._vms[0]["vm"].name,
self._vms[0]["adapter_number"],
self._vms[0]["port_number"],
self._vms[1]["vm"].name,
self._vms[1]["adapter_number"],
self._vms[1]["port_number"])
return re.sub("[^0-9A-Za-z_-]", "", capture_file_name) + ".pcap"
@property
def id(self):
return self._id
@ -63,4 +94,4 @@ class Link:
"adapter_number": side["adapter_number"],
"port_number": side["port_number"]
})
return {"vms": res, "link_id": self._id}
return {"vms": res, "link_id": self._id, "data_link_type": self._data_link_type}

48
gns3server/controller/udp_link.py
View File

@ -16,6 +16,7 @@
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import asyncio
import aiohttp
from .link import Link
@ -23,8 +24,9 @@ from .link import Link
class UDPLink(Link):
def __init__(self, project):
super().__init__(project)
def __init__(self, project, data_link_type="DLT_EN10MB"):
super().__init__(project, data_link_type)
self._capture_vm = None
@asyncio.coroutine
def create(self):
@ -76,3 +78,45 @@ class UDPLink(Link):
yield from vm1.delete("/adapters/{adapter_number}/ports/{port_number}/nio".format(adapter_number=adapter_number1, port_number=port_number1))
yield from vm2.delete("/adapters/{adapter_number}/ports/{port_number}/nio".format(adapter_number=adapter_number2, port_number=port_number2))
@asyncio.coroutine
def start_capture(self):
"""
Start capture on a link
"""
self._capture_vm = self._choose_capture_side()
data = {
"capture_file_name": self.capture_file_name(),
"data_link_type": self._data_link_type
}
yield from self._capture_vm["vm"].post("/adapters/{adapter_number}/ports/{port_number}/start_capture".format(adapter_number=self._capture_vm["adapter_number"], port_number=self._capture_vm["port_number"]), data=data)
@asyncio.coroutine
def stop_capture(self):
"""
Stop capture on a link
"""
if self._capture_vm:
yield from self._capture_vm["vm"].post("/adapters/{adapter_number}/ports/{port_number}/stop_capture".format(adapter_number=self._capture_vm["adapter_number"], port_number=self._capture_vm["port_number"]))
self._capture_vm = None
def _choose_capture_side(self):
"""
Run capture on the best candidate.
The ideal candidate is a node who support capture on controller
server
:returns: VM where the capture should run
"""
# For saving bandwith we use the local node first
for vm in self._vms:
if vm["vm"].compute.id == "local" and vm["vm"].vm_type not in ["qemu", "vpcs"]:
return vm
for vm in self._vms:
if vm["vm"].vm_type not in ["qemu", "vpcs"]:
return vm
raise aiohttp.web.HTTPConflict(text="Capture is not supported for this link")

3
gns3server/controller/vm.py
View File

@ -216,6 +216,9 @@ class VM:
else:
return (yield from self._compute.delete("/projects/{}/{}/vms/{}{}".format(self._project.id, self._vm_type, self._id, path)))
def __repr__(self):
return "<gns3server.controller.VM {} {}>".format(self._vm_type, self._name)
def __json__(self):
return {
"compute_id": self._compute.id,

40
gns3server/handlers/api/controller/link_handler.py
View File

@ -52,6 +52,46 @@ class LinkHandler:
response.set_status(201)
response.json(link)
@classmethod
@Route.post(
r"/projects/{project_id}/links/{link_id}/start_capture",
parameters={
"project_id": "UUID for the project",
"link_id": "UUID of the link"
},
status_codes={
204: "Capture started",
400: "Invalid request"
},
description="Start capture on a link instance")
def start_capture(request, response):
controller = Controller.instance()
project = controller.getProject(request.match_info["project_id"])
link = project.getLink(request.match_info["link_id"])
yield from link.start_capture()
response.set_status(204)
@classmethod
@Route.post(
r"/projects/{project_id}/links/{link_id}/stop_capture",
parameters={
"project_id": "UUID for the project",
"link_id": "UUID of the link"
},
status_codes={
204: "Capture stopped",
400: "Invalid request"
},
description="Stop capture on a link instance")
def stop_capture(request, response):
controller = Controller.instance()
project = controller.getProject(request.match_info["project_id"])
link = project.getLink(request.match_info["link_id"])
yield from link.stop_capture()
response.set_status(204)
@classmethod
@Route.delete(
r"/projects/{project_id}/links/{link_id}",

4
gns3server/schemas/link.py
View File

@ -28,6 +28,10 @@ LINK_OBJECT_SCHEMA = {
"maxLength": 36,
"pattern": "^[a-fA-F0-9]{8}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{12}$"
},
"data_link_type": {
"description": "PCAP data link type (http://www.tcpdump.org/linktypes.html)",
"enum": ["DLT_ATM_RFC1483", "DLT_EN10MB", "DLT_FRELAY", "DLT_C_HDLC"]
},
"vms": {
"description": "List of the VMS",
"type": "array",

5
gns3server/schemas/vm.py
View File

@ -54,9 +54,8 @@ VM_CAPTURE_SCHEMA = {
"minLength": 1,
},
"data_link_type": {
"description": "PCAP data link type",
"type": "string",
"minLength": 1,
"description": "PCAP data link type (http://www.tcpdump.org/linktypes.html)",
"enum": ["DLT_ATM_RFC1483", "DLT_EN10MB", "DLT_FRELAY", "DLT_C_HDLC"]
}
},
"additionalProperties": False,

10
tests/controller/test_link.py
View File

@ -57,6 +57,7 @@ def test_json(async_run, project, compute):
async_run(link.addVM(vm2, 1, 3))
assert link.__json__() == {
"link_id": link.id,
"data_link_type": "DLT_EN10MB",
"vms": [
{
"vm_id": vm1.id,
@ -70,3 +71,12 @@ def test_json(async_run, project, compute):
}
]
}
def test_capture_filename(project, compute, async_run):
vm1 = VM(project, compute, name="Hello@")
vm2 = VM(project, compute, name="w0.rld")
link = Link(project)
async_run(link.addVM(vm1, 0, 4))
async_run(link.addVM(vm2, 1, 3))
assert link.capture_file_name() == "Hello_0-4_to_w0rld_1-3.pcap"

62
tests/controller/test_udp_link.py
View File

@ -97,3 +97,65 @@ def test_delete(async_run, project):
compute1.delete.assert_any_call("/projects/{}/vpcs/vms/{}/adapters/0/ports/4/nio".format(project.id, vm1.id))
compute2.delete.assert_any_call("/projects/{}/vpcs/vms/{}/adapters/3/ports/1/nio".format(project.id, vm2.id))
def test_choose_capture_side(async_run, project):
"""
The link capture should run on the optimal node
"""
compute1 = MagicMock()
compute2 = MagicMock()
compute2.id = "local"
vm_vpcs = VM(project, compute1, vm_type="vpcs")
vm_iou = VM(project, compute2, vm_type="iou")
link = UDPLink(project)
async_run(link.addVM(vm_vpcs, 0, 4))
async_run(link.addVM(vm_iou, 3, 1))
assert link._choose_capture_side()["vm"] == vm_iou
vm_vpcs = VM(project, compute1, vm_type="vpcs")
vm_vpcs2 = VM(project, compute1, vm_type="vpcs")
link = UDPLink(project)
async_run(link.addVM(vm_vpcs, 0, 4))
async_run(link.addVM(vm_vpcs2, 3, 1))
# VPCS doesn't support capture
with pytest.raises(aiohttp.web.HTTPConflict):
link._choose_capture_side()["vm"]
# Capture should run on the local node
vm_iou = VM(project, compute1, vm_type="iou")
vm_iou2 = VM(project, compute2, vm_type="iou")
link = UDPLink(project)
async_run(link.addVM(vm_iou, 0, 4))
async_run(link.addVM(vm_iou2, 3, 1))
assert link._choose_capture_side()["vm"] == vm_iou2
def test_capture(async_run, project):
compute1 = MagicMock()
vm_vpcs = VM(project, compute1, vm_type="vpcs", name="V1")
vm_iou = VM(project, compute1, vm_type="iou", name="I1")
link = UDPLink(project)
async_run(link.addVM(vm_vpcs, 0, 4))
async_run(link.addVM(vm_iou, 3, 1))
capture = async_run(link.start_capture())
compute1.post.assert_any_call("/projects/{}/iou/vms/{}/adapters/3/ports/1/start_capture".format(project.id, vm_iou.id), data={
"capture_file_name": link.capture_file_name(),
"data_link_type": "DLT_EN10MB"
})
capture = async_run(link.stop_capture())
compute1.post.assert_any_call("/projects/{}/iou/vms/{}/adapters/3/ports/1/stop_capture".format(project.id, vm_iou.id))

41
tests/handlers/api/controller/test_link.py
View File

@ -36,11 +36,11 @@ from gns3server.controller.link import Link
@pytest.fixture
def hypervisor(http_controller, async_run):
hypervisor = MagicMock()
hypervisor.id = "example.com"
Controller.instance()._hypervisors = {"example.com": hypervisor}
return hypervisor
def compute(http_controller, async_run):
compute = MagicMock()
compute.id = "example.com"
Controller.instance()._computes = {"example.com": compute}
return compute
@pytest.fixture
@ -48,13 +48,13 @@ def project(http_controller, async_run):
return async_run(Controller.instance().addProject())
def test_create_link(http_controller, tmpdir, project, hypervisor, async_run):
def test_create_link(http_controller, tmpdir, project, compute, async_run):
response = MagicMock()
response.json = {"console": 2048}
hypervisor.post = AsyncioMagicMock(return_value=response)
compute.post = AsyncioMagicMock(return_value=response)
vm1 = async_run(project.addVM(hypervisor, None))
vm2 = async_run(project.addVM(hypervisor, None))
vm1 = async_run(project.addVM(compute, None))
vm2 = async_run(project.addVM(compute, None))
with asyncio_patch("gns3server.controller.udp_link.UDPLink.create") as mock:
response = http_controller.post("/projects/{}/links".format(project.id), {
@ -77,10 +77,29 @@ def test_create_link(http_controller, tmpdir, project, hypervisor, async_run):
assert len(response.json["vms"]) == 2
def test_delete_link(http_controller, tmpdir, project, hypervisor, async_run):
def test_start_capture(http_controller, tmpdir, project, compute, async_run):
link = Link(project)
project._links = {link.id: link}
with asyncio_patch("gns3server.controller.link.Link.start_capture") as mock:
response = http_controller.post("/projects/{}/links/{}/start_capture".format(project.id, link.id), example=True)
assert mock.called
assert response.status == 204
def test_stop_capture(http_controller, tmpdir, project, compute, async_run):
link = Link(project)
project._links = {link.id: link}
with asyncio_patch("gns3server.controller.link.Link.stop_capture") as mock:
response = http_controller.post("/projects/{}/links/{}/stop_capture".format(project.id, link.id), example=True)
assert mock.called
assert response.status == 204
def test_delete_link(http_controller, tmpdir, project, compute, async_run):
link = Link(project)
project._links = {link.id: link}
with asyncio_patch("gns3server.controller.udp_link.Link.delete"):
with asyncio_patch("gns3server.controller.link.Link.delete") as mock:
response = http_controller.delete("/projects/{}/links/{}".format(project.id, link.id), example=True)
assert mock.called
assert response.status == 204