mirror of
https://github.com/kernelkit/infix.git
synced 2026-07-31 04:53:01 +02:00
Joachim Wiberg
1bbd80d8c7
Let's drop the leading IETF or Infix prefixes from tests. Initially the idea was to mimnic the YANG models, but it's difficult to navigate and does not provide any real benefit to developers or end-users. Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
96 lines
3.7 KiB
Python
Executable File
96 lines
3.7 KiB
Python
Executable File
#!/usr/bin/env python3
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"""DHCP option 121 vs option 3
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Verify that DHCP option 121 (classless static routes) is used over the
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older option 3 (default gateway) in the DHCP client, when both are sent
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by the server, see RFC3442. Use the routing RIB in the operational
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datastore to verify.
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Installing routes from a DHCP server should not affect already existing
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(static) routes. To verify this, a static canary route (20.0.0.0/24 via
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192.168.0.2) is installed before starting the DHCP client. As a twist,
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this canary route has a next-hop (192.168.0.2) which is not reachable
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until a DHCP lease has been acquired.
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The DHCP server is set up to hand out both a default router (option 3)
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via 192.168.0.1 and a default route (option 121) via 192.168.0.254.
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"""
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import infamy
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import infamy.dhcp
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import infamy.route as route
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from infamy.util import until
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with infamy.Test() as test:
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PREFIX = '10.0.0.0/24'
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ROUTER = '192.168.0.254'
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CANARY = '20.0.0.0/24'
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CANHOP = '192.168.0.2'
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with test.step("Setting up canary route, 20.0.0.0/24 via 192.168.0.2"):
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env = infamy.Env()
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client = env.attach("client", "mgmt")
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_, host = env.ltop.xlate("host", "data")
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# Install canary route to smoke out any regressions in
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# how the DHCP client installs routes in the kernel FIB
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client.put_config_dict("ietf-routing", {
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"routing": {
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"control-plane-protocols": {
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"control-plane-protocol": [{
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"type": "infix-routing:static",
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"name": "default",
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"static-routes": {
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"ipv4": {
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"route": [{
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"destination-prefix": CANARY,
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"next-hop": {
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"next-hop-address": CANHOP
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},
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"infix-routing:route-preference": 250
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}]
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}
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}
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}]
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}
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}
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})
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with test.step("Enabling DHCP client, allow option 3 and 121"):
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_, port = env.ltop.xlate("client", "data")
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client.put_config_dict("ietf-interfaces", {
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"interfaces": {
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"interface": [{
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"name": f"{port}",
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"ipv4": {
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"infix-dhcp-client:dhcp": {
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"option": [
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{"id": "router"},
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{"id": "classless-static-route"}
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]
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}
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}
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}]
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}
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})
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with infamy.IsolatedMacVlan(host) as netns:
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netns.addip("192.168.0.1")
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print(f"Start DHCP server {ROUTER} with option 3 and 121")
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with infamy.dhcp.Server(netns, prefix=PREFIX, router=ROUTER):
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with test.step("Verify client has route 10.0.0.0/24 via 192.168.0.254 (option 121)"):
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print("Verify client use classless routes, option 121")
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until(lambda: route.ipv4_route_exist(client, PREFIX, ROUTER))
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with test.step("Verify client has default route via 192.168.0.254 (not use option 3)"):
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print("Verify client did *not* use option 3")
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if route.ipv4_route_exist(client, "0.0.0.0/0", ROUTER):
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test.fail()
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with test.step("Verify client still has canary route to 20.0.0.0/24 via 192.168.0.2"):
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until(lambda: route.ipv4_route_exist(client, CANARY,
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CANHOP, pref=250))
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test.succeed()
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