v0.5.0: Wake-on-LAN, webhook notifications, Advanced tab, login logo, update check

Closes the v0.4.x chapter — NFS works end to end. Five additions:

## Wake-on-LAN (Hosts → Bound hosts)
- New core::wol module: parse any MAC form, build the 102-byte magic
  packet, broadcast it. No special capability needed (ephemeral source
  port; SO_BROADCAST). Sends to the limited broadcast (255.255.255.255)
  AND the server's own subnet broadcast (computed from advertised IP +
  detected mask) so it reaches the right VLAN.
- POST /api/hosts/:mac/wol — only fires for *bound* MACs (404 otherwise)
  so it's not an open packet sprayer.
- Bound-hosts table grows a "Wake" button with inline Waking…/Sent ✓
  state.

## Webhook notifications (Advanced tab)
- core::notify: NotifyConfig + NotifyStore (notify.json), one provider
  at a time — Slack / Discord / Teams (incoming-webhook JSON) or SMTP.
  SMTP password is persisted but redacted on GET behind a __keep__
  sentinel the UI round-trips so the secret never leaves the box.
- http-api::notify: delivery — reqwest POST for chat (provider-shaped
  bodies), lettre for SMTP (rustls, STARTTLS/implicit TLS, no plaintext).
  10s timeout; every send is best-effort.
- GET/PUT /api/notify, POST /api/notify/test.
- Fired fire-and-forget on the canonical "machine is imaging" boot event
  and on WoL — never blocks the boot path.

## UI: Advanced tab
- New nav item. Holds the webhook config card and the API reference
  block (relocated from the bottom of Settings).

## UI: login/setup logo (FleetDM treatment)
- /api/me now returns has_custom_logo + logo_rev (public bootstrap).
  The login, setup, and connection-error cards render the uploaded logo
  full-width with the "OpenPXE" wordmark dropped — matching the sidebar.

## About: update check + licenses
- "Check for updates" button → GET /api/updates/check queries the Gitea
  releases API (derived from CARGO_PKG_REPOSITORY) and compares to the
  running version. Strictly on-demand — no background polling, keeps the
  air-gapped promise.
- License card documents the MIT OR Apache-2.0 dual license with links,
  plus a note on bundled components (iPXE GPLv2/UBDL, samba, wimtools).

Deps: lettre (SMTP, rustls) + reqwest gains the json feature. Both
rustls so the static musl binary stays OpenSSL-free.

Tests: 179 passing (+notify round-trip/redaction, webhook validation,
WoL-unbound-404, WoL packet loopback, version-compare). clippy clean.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
This commit is contained in:
Miles Ward
2026-05-29 14:34:20 -04:00
co-authored by Claude Opus 4.8
parent 1eb41288c3
commit fc99973ac3
16 changed files with 1817 additions and 61 deletions
+3
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@@ -12,9 +12,11 @@ pub mod error;
pub mod host_bindings;
pub mod log_bus;
pub mod metrics;
pub mod notify;
pub mod queue;
pub mod settings;
pub mod sso;
pub mod wol;
pub use arch::{ClientArch, FirmwareClass};
pub use auth::{AdminAccount, AdminPublic, AdminStore};
@@ -27,5 +29,6 @@ pub use error::{Error, Result};
pub use host_bindings::{normalize_mac, HostBinding, HostBindings};
pub use log_bus::{LogBus, LogBusLayer, LogLine};
pub use metrics::{HttpRoute, Metrics};
pub use notify::{NotifyConfig, NotifyKind, NotifyStore};
pub use queue::{DeploymentQueue, QueueEntry};
pub use settings::{Settings, SettingsStore, TimeoutAction};
+362
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@@ -0,0 +1,362 @@
//! Webhook / email notification configuration.
//!
//! v0.5.0: OpenPXE can ping a chat webhook or send an email when
//! something noteworthy happens (a machine PXE-booted an image, a
//! deployment was assigned, a WoL was sent). One active provider at a
//! time, chosen by `kind` — dead-simple for an L1 tech: pick Slack,
//! paste the incoming-webhook URL, done.
//!
//! This module owns only the *configuration* (validation + persistence
//! to `<work_dir>/notify.json`). The actual sending — HTTP POST for the
//! chat providers, SMTP for email — lives in the http-api crate, which
//! already carries an HTTP client and the SMTP dependency. Keeping the
//! network I/O out of `core` matches how `BrandingStore`/`SsoStore`
//! stay pure config stores.
//!
//! Secrets note: the SMTP password is persisted in `notify.json`
//! alongside the rest of the config (0644 like the other state files).
//! It is never echoed back through the API — the snapshot used for the
//! GET response blanks it (see `Self::redacted`).
use parking_lot::RwLock;
use serde::{Deserialize, Serialize};
use std::path::PathBuf;
use std::sync::Arc;
use crate::{Error, Result};
const MAX_URL_LEN: usize = 2048;
const MAX_FIELD_LEN: usize = 512;
/// Which notification transport is active.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Default, Serialize, Deserialize)]
#[serde(rename_all = "lowercase")]
pub enum NotifyKind {
/// Slack incoming webhook (`{ "text": ... }`).
#[default]
Slack,
/// Discord webhook (`{ "content": ... }`).
Discord,
/// Microsoft Teams incoming webhook (legacy MessageCard JSON).
Teams,
/// Email via SMTP.
Smtp,
}
impl NotifyKind {
/// True when this kind drives a chat webhook (POST a JSON body to a
/// single URL) rather than SMTP.
#[must_use]
pub fn is_webhook(self) -> bool {
matches!(self, Self::Slack | Self::Discord | Self::Teams)
}
}
/// Operator-configurable notification settings. Single provider active
/// at a time; the inactive fields are kept so switching providers
/// doesn't wipe the other one's values.
#[derive(Debug, Clone, Default, Serialize, Deserialize)]
pub struct NotifyConfig {
#[serde(default)]
pub enabled: bool,
#[serde(default)]
pub kind: NotifyKind,
/// Incoming-webhook URL for Slack / Discord / Teams.
#[serde(default)]
pub webhook_url: String,
// ── SMTP fields (used when kind == Smtp) ──
#[serde(default)]
pub smtp_host: String,
#[serde(default = "default_smtp_port")]
pub smtp_port: u16,
#[serde(default)]
pub smtp_username: String,
#[serde(default)]
pub smtp_password: String,
/// `From:` address. Falls back to `smtp_username` when blank.
#[serde(default)]
pub smtp_from: String,
/// `To:` address (single recipient — keep it simple).
#[serde(default)]
pub smtp_to: String,
/// Use implicit TLS (port 465). When false we use STARTTLS on the
/// configured port (587 typical). Either way the connection is
/// encrypted — we never offer plaintext SMTP.
#[serde(default)]
pub smtp_implicit_tls: bool,
}
fn default_smtp_port() -> u16 {
587
}
impl NotifyConfig {
/// True when enabled and the active provider has the fields it
/// needs to actually send.
#[must_use]
pub fn is_usable(&self) -> bool {
if !self.enabled {
return false;
}
if self.kind.is_webhook() {
!self.webhook_url.trim().is_empty()
} else {
!self.smtp_host.trim().is_empty() && !self.smtp_to.trim().is_empty()
}
}
/// A copy safe to return over the API: the SMTP password is blanked
/// (replaced with a non-empty sentinel only when one is set, so the
/// UI can show "configured" without leaking it).
#[must_use]
pub fn redacted(&self) -> NotifyConfig {
let mut c = self.clone();
if !c.smtp_password.is_empty() {
c.smtp_password = SECRET_SENTINEL.to_string();
}
c
}
}
/// Returned by the API in place of a stored password. When the UI PUTs
/// this value back unchanged we keep the existing password rather than
/// overwriting it with the sentinel.
pub const SECRET_SENTINEL: &str = "__keep__";
/// In-memory + on-disk notification config registry.
#[derive(Debug, Clone)]
pub struct NotifyStore {
path: Arc<PathBuf>,
inner: Arc<RwLock<NotifyConfig>>,
}
impl NotifyStore {
#[must_use]
pub fn load_or_default(work_dir: &std::path::Path) -> Self {
let path = work_dir.join("notify.json");
let cfg = match std::fs::read_to_string(&path) {
Ok(text) => serde_json::from_str::<NotifyConfig>(&text).unwrap_or_else(|e| {
tracing::warn!(
target: "openpxe::notify",
"notify.json unreadable ({e}); starting with defaults"
);
NotifyConfig::default()
}),
Err(_) => NotifyConfig::default(),
};
Self {
path: Arc::new(path),
inner: Arc::new(RwLock::new(cfg)),
}
}
#[must_use]
pub fn snapshot(&self) -> NotifyConfig {
self.inner.read().clone()
}
/// Replace the whole config. `incoming.smtp_password == SECRET_SENTINEL`
/// is treated as "keep the existing password" so the UI never has to
/// round-trip the real secret.
pub fn replace(&self, mut incoming: NotifyConfig) -> Result<NotifyConfig> {
incoming.webhook_url = incoming.webhook_url.trim().to_string();
incoming.smtp_host = incoming.smtp_host.trim().to_string();
incoming.smtp_username = incoming.smtp_username.trim().to_string();
incoming.smtp_from = incoming.smtp_from.trim().to_string();
incoming.smtp_to = incoming.smtp_to.trim().to_string();
// Preserve the stored password when the UI sends the sentinel.
if incoming.smtp_password == SECRET_SENTINEL {
incoming
.smtp_password
.clone_from(&self.inner.read().smtp_password);
}
// Length caps.
if incoming.webhook_url.len() > MAX_URL_LEN {
return Err(Error::Invalid(format!(
"webhook URL exceeds {MAX_URL_LEN}-char cap"
)));
}
for (name, v) in [
("smtp_host", &incoming.smtp_host),
("smtp_username", &incoming.smtp_username),
("smtp_from", &incoming.smtp_from),
("smtp_to", &incoming.smtp_to),
] {
if v.len() > MAX_FIELD_LEN {
return Err(Error::Invalid(format!(
"{name} exceeds {MAX_FIELD_LEN}-char cap"
)));
}
}
// Validate the active provider only when enabling.
if incoming.enabled {
if incoming.kind.is_webhook() {
if incoming.webhook_url.is_empty() {
return Err(Error::Invalid(
"a webhook URL is required to enable chat notifications".into(),
));
}
if !incoming.webhook_url.starts_with("https://")
&& !incoming.webhook_url.starts_with("http://")
{
return Err(Error::Invalid(
"webhook URL must start with http:// or https://".into(),
));
}
} else {
if incoming.smtp_host.is_empty() {
return Err(Error::Invalid(
"SMTP host is required to enable email notifications".into(),
));
}
if incoming.smtp_to.is_empty() {
return Err(Error::Invalid(
"a recipient (To) is required to enable email notifications".into(),
));
}
if incoming.smtp_port == 0 {
return Err(Error::Invalid("SMTP port must be non-zero".into()));
}
}
}
{
let mut g = self.inner.write();
*g = incoming.clone();
}
self.persist();
tracing::info!(
target: "openpxe::notify",
enabled = incoming.enabled, kind = ?incoming.kind,
"notification configuration updated"
);
Ok(incoming)
}
fn persist(&self) {
let snap = self.inner.read().clone();
let body = match serde_json::to_vec_pretty(&snap) {
Ok(b) => b,
Err(e) => {
tracing::warn!(target: "openpxe::notify", "serialize notify.json: {e}");
return;
}
};
if let Some(parent) = self.path.parent() {
let _ = std::fs::create_dir_all(parent);
}
let tmp = self.path.with_extension("json.tmp");
if let Err(e) = std::fs::write(&tmp, body) {
tracing::warn!(target: "openpxe::notify", "write notify.json tmp: {e}");
return;
}
if let Err(e) = std::fs::rename(&tmp, self.path.as_path()) {
tracing::warn!(target: "openpxe::notify", "rename notify.json: {e}");
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use tempfile::tempdir;
#[test]
fn default_disabled_not_usable() {
let dir = tempdir().unwrap();
let s = NotifyStore::load_or_default(dir.path());
assert!(!s.snapshot().enabled);
assert!(!s.snapshot().is_usable());
}
#[test]
fn slack_requires_url_when_enabled() {
let dir = tempdir().unwrap();
let s = NotifyStore::load_or_default(dir.path());
let r = s.replace(NotifyConfig {
enabled: true,
kind: NotifyKind::Slack,
..Default::default()
});
assert!(matches!(r, Err(Error::Invalid(_))));
s.replace(NotifyConfig {
enabled: true,
kind: NotifyKind::Slack,
webhook_url: "https://hooks.slack.com/services/XXX".into(),
..Default::default()
})
.unwrap();
assert!(s.snapshot().is_usable());
}
#[test]
fn smtp_requires_host_and_recipient() {
let dir = tempdir().unwrap();
let s = NotifyStore::load_or_default(dir.path());
let r = s.replace(NotifyConfig {
enabled: true,
kind: NotifyKind::Smtp,
smtp_host: "smtp.example.com".into(),
..Default::default()
});
assert!(matches!(r, Err(Error::Invalid(_))), "missing recipient should reject");
s.replace(NotifyConfig {
enabled: true,
kind: NotifyKind::Smtp,
smtp_host: "smtp.example.com".into(),
smtp_port: 587,
smtp_to: "[email protected]".into(),
smtp_from: "[email protected]".into(),
..Default::default()
})
.unwrap();
assert!(s.snapshot().is_usable());
}
#[test]
fn password_sentinel_preserves_stored_secret() {
let dir = tempdir().unwrap();
let s = NotifyStore::load_or_default(dir.path());
s.replace(NotifyConfig {
enabled: true,
kind: NotifyKind::Smtp,
smtp_host: "smtp.example.com".into(),
smtp_port: 587,
smtp_to: "[email protected]".into(),
smtp_password: "s3cret".into(),
..Default::default()
})
.unwrap();
// Redacted snapshot hides the password behind the sentinel.
assert_eq!(s.snapshot().redacted().smtp_password, SECRET_SENTINEL);
// PUTting the sentinel back keeps the real password.
s.replace(NotifyConfig {
enabled: true,
kind: NotifyKind::Smtp,
smtp_host: "smtp.example.com".into(),
smtp_port: 587,
smtp_to: "[email protected]".into(),
smtp_password: SECRET_SENTINEL.into(),
..Default::default()
})
.unwrap();
assert_eq!(s.snapshot().smtp_password, "s3cret");
}
#[test]
fn webhook_url_scheme_enforced() {
let dir = tempdir().unwrap();
let s = NotifyStore::load_or_default(dir.path());
let r = s.replace(NotifyConfig {
enabled: true,
kind: NotifyKind::Discord,
webhook_url: "ftp://example.com/hook".into(),
..Default::default()
});
assert!(matches!(r, Err(Error::Invalid(_))));
}
}
+210
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@@ -0,0 +1,210 @@
//! Wake-on-LAN.
//!
//! v0.5.0: from the Hosts tab, an operator can wake a bound machine.
//! WoL is a "magic packet" — six `0xFF` bytes followed by the target
//! MAC repeated sixteen times (102 bytes total) — broadcast on the
//! local segment. The NIC's WoL logic matches the repeated MAC and
//! powers the board on.
//!
//! ## Why this is trivial and safe in our container
//!
//! - It's a single UDP datagram to a broadcast address. No privileged
//! *local* port is needed (we bind an ephemeral source port); the
//! destination port is conventionally 9 (discard) or 7 (echo), and
//! nothing actually listens there — the magic is in the payload, not
//! the port. So WoL works without any extra capability.
//! - We send to the limited broadcast `255.255.255.255` (stays on the
//! local link) and, when the caller knows the server's own subnet
//! broadcast, to that too — directed broadcast reaches the right VLAN
//! even when the host bridges multiple segments.
//!
//! ## Limits
//!
//! WoL only crosses L2. If the target is on a different subnet than the
//! OpenPXE host, the intervening router must be configured to forward
//! directed broadcasts (most aren't, by design). For the common case —
//! OpenPXE and its PXE clients on the same VLAN — the limited broadcast
//! is enough.
use crate::{Error, Result};
use std::net::{Ipv4Addr, SocketAddrV4, UdpSocket};
/// Conventional WoL destination port. 9 (discard) is the de-facto
/// default; the port is immaterial since the match is on the payload.
const WOL_PORT: u16 = 9;
/// Parse a MAC string in any common form (`aa:bb:cc:dd:ee:ff`,
/// `aa-bb-...`, `aabb.ccdd.eeff`, or bare hex) into six octets.
///
/// Returns `Error::Invalid` if it doesn't resolve to exactly six bytes.
pub fn parse_mac(mac: &str) -> Result<[u8; 6]> {
// Strip every non-hex-digit, then expect exactly 12 hex chars.
let hex: String = mac.chars().filter(char::is_ascii_hexdigit).collect();
if hex.len() != 12 {
return Err(Error::Invalid(format!(
"invalid MAC '{mac}': expected 6 octets (12 hex digits), got {}",
hex.len()
)));
}
let mut out = [0u8; 6];
for (i, byte) in out.iter_mut().enumerate() {
// Each octet is two hex chars; unwrap is safe — we validated
// the length and that every char is a hex digit above.
*byte = u8::from_str_radix(&hex[i * 2..i * 2 + 2], 16)
.map_err(|e| Error::Invalid(format!("invalid MAC '{mac}': {e}")))?;
}
Ok(out)
}
/// Build the 102-byte magic packet for `mac`.
#[must_use]
pub fn magic_packet(mac: [u8; 6]) -> [u8; 102] {
let mut pkt = [0u8; 102];
// 6 bytes of 0xFF.
for b in &mut pkt[..6] {
*b = 0xFF;
}
// MAC repeated 16 times.
for rep in 0..16 {
let start = 6 + rep * 6;
pkt[start..start + 6].copy_from_slice(&mac);
}
pkt
}
/// Send a Wake-on-LAN magic packet for `mac` to every address in
/// `broadcasts` (e.g. `255.255.255.255` plus the server's subnet
/// broadcast). Returns the number of broadcast addresses the packet was
/// successfully sent to; errors only if the MAC is malformed or the
/// socket can't be opened at all.
pub fn wake(mac: &str, broadcasts: &[Ipv4Addr]) -> Result<usize> {
let parsed = parse_mac(mac)?;
let packet = magic_packet(parsed);
// Always include the limited broadcast even if the caller didn't —
// it's the one that works with zero network configuration.
let mut targets: Vec<Ipv4Addr> = vec![Ipv4Addr::BROADCAST];
for b in broadcasts {
if !targets.contains(b) {
targets.push(*b);
}
}
let sent = send_magic(&packet, &targets, WOL_PORT)?;
tracing::info!(
target: "openpxe::wol",
mac = %mac, broadcasts = sent,
"Wake-on-LAN magic packet sent"
);
Ok(sent)
}
/// Open a broadcast-enabled UDP socket and send `packet` to every
/// `target:port`. Returns how many sends succeeded. Errors if the
/// socket can't be opened or if *no* target accepted the packet.
fn send_magic(packet: &[u8], targets: &[Ipv4Addr], port: u16) -> Result<usize> {
// Bind an ephemeral local UDP port on all interfaces. SO_BROADCAST
// must be enabled to send to a broadcast address.
let sock = UdpSocket::bind(SocketAddrV4::new(Ipv4Addr::UNSPECIFIED, 0))
.map_err(|e| Error::Invalid(format!("could not open WoL socket: {e}")))?;
sock.set_broadcast(true)
.map_err(|e| Error::Invalid(format!("could not enable broadcast: {e}")))?;
let mut sent = 0usize;
for &addr in targets {
match sock.send_to(packet, SocketAddrV4::new(addr, port)) {
Ok(_) => sent += 1,
Err(e) => {
tracing::warn!(
target: "openpxe::wol",
broadcast = %addr,
"WoL send failed: {e}"
);
}
}
}
if sent == 0 {
return Err(Error::Invalid(
"Wake-on-LAN: no broadcast address accepted the packet".into(),
));
}
Ok(sent)
}
/// Compute the IPv4 broadcast address for `ip`/`mask`, if both parse.
/// Used so the caller can include the server's own subnet broadcast
/// alongside the limited broadcast.
#[must_use]
pub fn subnet_broadcast(ip: Ipv4Addr, mask: Ipv4Addr) -> Ipv4Addr {
let ip = u32::from(ip);
let mask = u32::from(mask);
Ipv4Addr::from(ip | !mask)
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn parse_mac_accepts_common_forms() {
let want = [0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff];
assert_eq!(parse_mac("aa:bb:cc:dd:ee:ff").unwrap(), want);
assert_eq!(parse_mac("AA-BB-CC-DD-EE-FF").unwrap(), want);
assert_eq!(parse_mac("aabb.ccdd.eeff").unwrap(), want);
assert_eq!(parse_mac("aabbccddeeff").unwrap(), want);
}
#[test]
fn parse_mac_rejects_bad_length() {
assert!(parse_mac("aa:bb:cc").is_err());
assert!(parse_mac("").is_err());
assert!(parse_mac("zz:bb:cc:dd:ee:ff").is_err()); // non-hex stripped → too short
}
#[test]
fn magic_packet_shape() {
let pkt = magic_packet([0x01, 0x02, 0x03, 0x04, 0x05, 0x06]);
assert_eq!(&pkt[..6], &[0xFF; 6]);
// First MAC repetition.
assert_eq!(&pkt[6..12], &[0x01, 0x02, 0x03, 0x04, 0x05, 0x06]);
// Last (16th) repetition ends the packet.
assert_eq!(&pkt[96..102], &[0x01, 0x02, 0x03, 0x04, 0x05, 0x06]);
}
#[test]
fn subnet_broadcast_computes() {
assert_eq!(
subnet_broadcast(
Ipv4Addr::new(192, 168, 1, 49),
Ipv4Addr::new(255, 255, 255, 0)
),
Ipv4Addr::new(192, 168, 1, 255)
);
assert_eq!(
subnet_broadcast(
Ipv4Addr::new(10, 5, 3, 7),
Ipv4Addr::new(255, 255, 0, 0)
),
Ipv4Addr::new(10, 5, 255, 255)
);
}
#[test]
fn send_magic_delivers_intact_packet_over_loopback() {
// Deterministic round-trip that doesn't depend on the sandbox
// permitting a real L2 broadcast: bind a receiver on loopback
// and confirm send_magic transmits the exact 102-byte packet.
let rx = UdpSocket::bind(SocketAddrV4::new(Ipv4Addr::LOCALHOST, 0)).unwrap();
let port = rx.local_addr().unwrap().port();
rx.set_read_timeout(Some(std::time::Duration::from_secs(2))).unwrap();
let packet = magic_packet([0x0a, 0x1b, 0x2c, 0x3d, 0x4e, 0x5f]);
let sent = send_magic(&packet, &[Ipv4Addr::LOCALHOST], port).unwrap();
assert_eq!(sent, 1);
let mut buf = [0u8; 128];
let n = rx.recv(&mut buf).unwrap();
assert_eq!(n, 102, "magic packet should be 102 bytes");
assert_eq!(&buf[..102], &packet[..]);
}
}