policy_testing_common/
lib.rs

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1// Copyright 2024 The Fuchsia Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5use std::pin::pin;
6
7use fidl_fuchsia_net_interfaces as fnet_interfaces;
8use futures::future::{FutureExt as _, LocalBoxFuture};
9use netstack_testing_common::realms::{
10    KnownServiceProvider, Manager, ManagerConfig, Netstack, TestSandboxExt,
11};
12use netstack_testing_common::{
13    interfaces, wait_for_component_stopped, ASYNC_EVENT_POSITIVE_CHECK_TIMEOUT,
14};
15
16/// Initialize a realm with a device that is owned by netcfg.
17/// The device is discovered through devfs and installed into
18/// the Netstack via netcfg. `after_interface_up` is called
19/// once the interface has been discovered via the Netstack
20/// interfaces watcher.
21pub async fn with_netcfg_owned_device<
22    M: Manager,
23    N: Netstack,
24    F: for<'a> FnOnce(
25        u64,
26        &'a netemul::TestNetwork<'a>,
27        &'a fnet_interfaces::StateProxy,
28        &'a netemul::TestRealm<'a>,
29        &'a netemul::TestSandbox,
30    ) -> LocalBoxFuture<'a, ()>,
31>(
32    name: &str,
33    manager_config: ManagerConfig,
34    use_out_of_stack_dhcp_client: bool,
35    extra_known_service_providers: impl IntoIterator<Item = KnownServiceProvider>,
36    after_interface_up: F,
37) -> String {
38    let sandbox = netemul::TestSandbox::new().expect("create sandbox");
39    let realm = sandbox
40        .create_netstack_realm_with::<N, _, _>(
41            name,
42            [
43                KnownServiceProvider::Manager {
44                    agent: M::MANAGEMENT_AGENT,
45                    use_dhcp_server: false,
46                    use_out_of_stack_dhcp_client,
47                    config: manager_config,
48                },
49                KnownServiceProvider::DnsResolver,
50                KnownServiceProvider::FakeClock,
51            ]
52            .into_iter()
53            .chain(extra_known_service_providers)
54            // If the client requested an out of stack DHCP client, add it to
55            // the list of service providers.
56            .chain(
57                use_out_of_stack_dhcp_client
58                    .then_some(KnownServiceProvider::DhcpClient)
59                    .into_iter(),
60            ),
61        )
62        .expect("create netstack realm");
63
64    // Add a device to the realm.
65    let network = sandbox.create_network(name).await.expect("create network");
66    let endpoint = network.create_endpoint(name).await.expect("create endpoint");
67    endpoint.set_link_up(true).await.expect("set link up");
68    let endpoint_mount_path = netemul::devfs_device_path("ep");
69    let endpoint_mount_path = endpoint_mount_path.as_path();
70    realm.add_virtual_device(&endpoint, endpoint_mount_path).await.unwrap_or_else(|e| {
71        panic!("add virtual device {}: {:?}", endpoint_mount_path.display(), e)
72    });
73
74    // Make sure the Netstack got the new device added.
75    let interface_state = realm
76        .connect_to_protocol::<fnet_interfaces::StateMarker>()
77        .expect("connect to fuchsia.net.interfaces/State service");
78    let wait_for_netmgr =
79        wait_for_component_stopped(&realm, M::MANAGEMENT_AGENT.get_component_name(), None).fuse();
80    let mut wait_for_netmgr = pin!(wait_for_netmgr);
81    let (if_id, if_name): (u64, String) = interfaces::wait_for_non_loopback_interface_up(
82        &interface_state,
83        &mut wait_for_netmgr,
84        None,
85        ASYNC_EVENT_POSITIVE_CHECK_TIMEOUT,
86    )
87    .await
88    .expect("wait for non loopback interface");
89
90    after_interface_up(if_id, &network, &interface_state, &realm, &sandbox).await;
91
92    // Wait for orderly shutdown of the test realm to complete before allowing
93    // test interfaces to be cleaned up.
94    //
95    // This is necessary to prevent test interfaces from being removed while
96    // NetCfg is still in the process of configuring them after adding them to
97    // the Netstack, which causes spurious errors.
98    realm.shutdown().await.expect("failed to shutdown realm");
99
100    if_name
101}
policy_testing_common/lib.rs

policy_testing_common/
lib.rs
