Commit Graph
9 Commits
Author SHA1 Message Date
riccardom 48a2a7a5b7 [client] Discover interfaces lazily in stdnet instead of at construction
stdnet.NewNet and NewNetWithDiscover ended with

    return n, n.UpdateInterfaces()

handing back a non-nil *Net together with the discovery error. Three of the
five call sites (Engine.newWgIface, ice.NewAgent, SingleSocketUDPMux) logged
the error and kept using the instance, which is only safe as long as the
instance still works after a failed discovery.

That stopped being true when Interfaces() gained a lazily refreshed cache:
updateInterfaces sets lastUpdate only on success, so after a failed
construction the 30s cache guard never holds and Interfaces() returns an
error rather than the empty list it used to return. Feeding such an instance
to pion is worse than passing nothing at all - ice.NewAgent falls back to its
own stdnet when Net is nil, and the interface blacklist is applied separately
through AgentConfig.InterfaceFilter, so the fallback loses nothing. Instead,
a transient discovery failure (the Android bridge at boot, or an interface
disappearing between net.Interfaces() and Interface.Addrs()) turned into a
hard "error getting local interfaces" from ice.NewAgent, and aborted the STUN
and TURN probes, which never even need the interface list.

Since the accessors already refresh a stale cache on demand, the eager
discovery in the constructors is redundant: drop it, make both constructors
infallible, and let the discovery error surface at the call that actually
needs the interfaces. UpdateInterfaces had no callers left and is not part of
transport.Net, so it is removed along with it.

InterfaceByIndex and InterfaceByName read the cached slice directly and never
refreshed it, so they would have kept reporting ErrInterfaceNotFound forever
on an instance whose first discovery failed. They now go through the same
refresh path as Interfaces().
2026-08-28 12:58:27 +02:00
Riccardo Manfrin 1e5b0a5c89 [client] Make Test_ConnectPeers deterministic under Docker/eBPF kernel / Darwin CI (#6884)
## Describe your changes

Make `Test_ConnectPeers` deterministic. Two issues, both surfaced once
the
privileged suite moved into a `--privileged` Docker container (#6425):

1. The peers used `getLocalIP()` as their WireGuard endpoint, i.e. the
host's
routable NIC IP (the docker bridge IP `172.17.0.2` in CI). That address
might
not hairpin reliably inside the container, so the handshake
intermittently
timed out (flaky). Use loopback (`127.1.0.x`) instead — always
self-reachable.
2. On a Linux runner with the WG kernel module the iface uses the eBPF
proxy
factory. Its manager is a singleton with one shared XDP program +
settings
map, so bringing up the two ifaces makes the second factory overwrite
the
first's `wg_port`/`proxy_port` and the handshake is dropped. The test is
   incompatible with the eBPF factory, so disable it via
`NB_DISABLE_EBPF_WG_PROXY` (peers then handshake directly over
loopback).
Running the suite across all three modes (eBPF / UDP proxy / ICE bind)
would
   need a larger refactor.

Also fixes a typo in the `ErrSharedSockStopped` message (`socked` →
`socket`).

## Issue ticket number and link

No public issue — CI flakiness follow-up to #6871 on `Test_ConnectPeers`

(https://github.com/netbirdio/netbird/blob/main/client/iface/iface_test.go).

## Stack

<!-- branch-stack -->

### Checklist
- [x] Is it a bug fix
- [ ] Is a typo/documentation fix
- [ ] Is a feature enhancement
- [ ] It is a refactor
- [ ] Created tests that fail without the change (if possible)

> By submitting this pull request, you confirm that you have read and
agree to the terms of the [Contributor License
Agreement](https://github.com/netbirdio/netbird/blob/main/CONTRIBUTOR_LICENSE_AGREEMENT.md).

## Documentation
Select exactly one:

- [ ] I added/updated documentation for this change
- [x] Documentation is **not needed** for this change (explain why)

Test-only change (plus a log-string typo). No public API, CLI, config,
or
behavior change.

### Docs PR URL (required if "docs added" is checked)
Paste the PR link from https://github.com/netbirdio/docs here:

N/A

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<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit

* **Bug Fixes**
* Corrected the “shared socket stopped” error message for clearer
output.
* **Tests**
* Improved peer connection test reliability in privileged CI by
disabling the eBPF WireGuard proxy and using fixed loopback UDP
endpoints for deterministic setup.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
2026-07-24 15:23:22 +02:00
Riccardo Manfrin 3358138ccc [client] Fix flaky Test_ConnectPeers busy-loop handshake wait (#6871)
## Describe your changes

  `Test_ConnectPeers` in `client/iface` is flaky in CI, timing out with
  `waiting for peer handshake timeout after 30s`.

  The wait loop polled `getPeer()` in a tight busy-loop with no sleep
(a `select` with a `default` branch), pegging a CPU core. The peers run
  userspace WireGuard (stdnet transport), so the spin starved the
wireguard-go goroutines that actually process the handshake, making the
  30s wait flaky under CI load.

Poll on a 500ms ticker instead so the CPU is yielded between checks, and
  check the handshake state before waiting. Same logic, no busy-spin.

  ## Issue ticket number and link

  N/A — CI flakiness fix.

  ### Checklist
  - [x] Is it a bug fix
  - [ ] Is a typo/documentation fix
  - [ ] Is a feature enhancement
  - [ ] It is a refactor
  - [ ] Created tests that fail without the change (if possible)
- [x] This change does **not** modify the public API, gRPC protocols,
functionality behavior, CLI / service flags, or introduce a new feature

  ## Documentation

  - [x] Documentation is **not needed** for this change (test-only fix)

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<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit

* **Tests**
* Improved peer connection test waiting behavior to avoid busy spinning.
* Added a timeout and periodic checks, with clearer failure handling
when a handshake does not complete.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->
2026-07-23 15:48:16 +02:00
Zoltan Pappandcoderabbitai[bot] 2d7b309004 [client] Categorize privileged tests behind a build tag and run them in Docker (#6425)
* [client] categorize root/system-mutating tests behind a privileged build tag

Tests that need root or mutate host state (nftables/iptables/DNS, TUN/WireGuard
interfaces, routes, eBPF, SSH/service install) are now gated behind a
//go:build privileged tag. The default `go test ./client/...` runs as a non-root
user with no sudo and leaves host networking untouched; mixed files were split so
pure-logic tests stay in the default suite.

A self-hosting ory/dockertest/v4 harness (client/testutil/privileged) runs the
privileged suite inside a --privileged --cap-add=NET_ADMIN container via
`make test-privileged`; a DOCKER_CI=true guard skips the spawn when already inside
the container. Added `make test-unit` for the host-safe run.

* [client] add PRIV_RUN/PRIV_PKGS filters to the privileged test harness

The dockertest harness now reads two optional env vars when building the
in-container `go test` command: PRIV_RUN adds a -run test-name filter and
PRIV_PKGS overrides the package list. Both empty reproduce the full privileged
suite, so CI and `make test-privileged` behave as before. Lets a developer run a
single privileged test in the container, e.g.:

  PRIV_RUN=TestNftablesManager PRIV_PKGS=./client/firewall/nftables/... make test-privileged

* [client] fix unused-helper lint after the privileged test split

Splitting privileged tests into *_privileged_test.go left their shared helpers in
the untagged files, so in the default (no-tag) build they had no callers and
golangci-lint flagged them as unused.

Moved the privileged-only helpers into the privileged files next to their callers
(generateDummyHandler; createEngine/startSignal/startManagement/getConnectedPeers/
getPeers + kaep/kasp; (*mockDaemon).setJWTToken). Annotated the shared routing-test
fixtures that must stay untagged for cross-platform compilation with //nolint:unused
(systemops_bsd expected* vars, ensureIPv6DefaultRoute on bsd/windows,
loopbackIfaceWindows), matching the existing linux variant.

* [client] fix privileged test CI failures and run the harness on macOS

The host-safe unit run dropped sudo but two privileged test groups were
never tagged, and the Docker privileged job silently never ran the suite:

- Gate the ssh/server PrivilegeDropper command-construction tests behind
  the privileged tag (they require root to target a different UID); split
  them into executor_unix_privileged_test.go.
- Tag sharedsock raw-socket tests privileged (need CAP_NET_RAW).
- Fix the Docker job command: nested single quotes around the build tags
  closed the sh -c wrapper early, dropping the go list package set and the
  privileged tag, so go test ran on the empty repo root. Use double quotes.

Make the self-hosting harness usable from a dev Mac:

- Build it on darwin as well as linux; it only drives Docker.
- Resolve the active docker context endpoint into DOCKER_HOST when the
  default /var/run/docker.sock is absent (Docker Desktop, Colima, OrbStack).
- Rename the misspelled containerGoModache constant to containerGoModCache.

* Update client/internal/engine_privileged_test.go

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

* Update client/internal/routemanager/systemops/systemops_linux_test.go

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

* Update client/internal/routemanager/systemops/systemops_windows_test.go

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

* Update client/server/server_privileged_test.go

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

* [ci] Run privileged-tagged tests on darwin, windows and freebsd

The privileged build tag split moved root/system-mutating tests behind
//go:build privileged, but only the linux docker job was given the tag.
The native darwin (sudo), windows (PsExec64 -s) and freebsd VM runners
already have the required privileges, so add the privileged tag there too
to keep CI running the same set of tests as before the split.

* [ci] Exclude dockertest harness from the darwin privileged run

The privileged tag now compiles client/testutil/privileged on darwin, whose
TestRunPrivilegedSuiteInDocker spawns a container the macOS runner has no
Docker for. Exclude the harness package from the darwin list, matching the
linux job, so the privileged tests run in place without a container spawn.

---------

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
2026-06-28 16:15:54 +02:00
Viktor Liu 205ebcfda2 [management, client] Add IPv6 overlay support (#5631) 2026-05-07 11:33:37 +02:00
Viktor Liu 9cc9462cd5 [client] Use stdnet with a context to avoid DNS deadlocks (#4781) 2025-11-13 20:16:45 +01:00
Zoltan PappandHakan Sariman 0819df916e [client] Replace string to netip.Prefix (#3362)
Replace string to netip.Prefix

---------

Co-authored-by: Hakan Sariman <hknsrmn46@gmail.com>
2025-02-24 15:51:43 +01:00
Zoltan Papp 30ebcf38c7 [client] Eliminate UDP proxy in user-space mode (#2712)
In the case of user space WireGuard mode, use in-memory proxy between the TURN/Relay connection and the WireGuard Bind. We keep the UDP proxy and eBPF proxy for kernel mode.

The key change is the new wgproxy/bind and the iface/bind/ice_bind changes. Everything else is just to fulfill the dependencies.
2024-10-22 20:53:14 +02:00
Zoltan Papp fd67892cb4 [client] Refactor/iface pkg (#2646)
Refactor the flat code structure
2024-10-02 18:24:22 +02:00