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Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
 Johnathan Corgan
|
bf77ececad |
Fix DNS responder silent-drop on systemd-resolved deployments
The previous default configured systemd-resolved with `resolvectl dns fips0 [<fips0_addr>]:5354`, intended to bypass an Ubuntu 22 systemd 249 interface-scoping bug. That target collides with the daemon's mesh-interface filter on Linux: when an IPv6 packet's destination belongs to a non-loopback interface, the kernel attributes the packet to that interface in IPV6_PKTINFO (ipi6_ifindex == fips0) even though loopback delivery is used (tcpdump shows lo). The mesh-interface filter sees arrival_ifindex == mesh_ifindex and silently drops every query at trace level — invisible to operators at the default debug level. Net effect on stock deployments: every .fips query on systemd-resolved hosts was silently dropped. Daemon side ----------- - Default `dns.bind_addr` changes from "::" to "::1" (IPv6 loopback only). The mesh-interface filter is then defanged on the default path because loopback isn't reachable from mesh peers. The filter remains in place defensively for operators who explicitly bind "::" to expose a mesh-reachable responder. fips-dns-setup backend unification ---------------------------------- - New `try_global_drop_in` backend writes /etc/systemd/resolved.conf.d/fips.conf with DNS=[::1]:5354 and Domains=~fips. Inserted ahead of `try_resolvectl` in the dispatch chain. The standard loopback path has no interface scoping, so ipi6_ifindex reports lo and the filter passes. - All other backends now target [::1]:5354 to match the daemon's default IPv6-loopback bind: - try_dns_delegate writes DNS=[::1]:5354 - try_dnsmasq writes server=/fips/::1#5354 - try_nm_dnsmasq writes server=/fips/::1#5354 - Fixed dns-delegate file path: was /etc/systemd/dns-delegate/, must be /etc/systemd/dns-delegate.d/ (with .d suffix). systemd-resolved silently ignored the previous path. - fips-dns-teardown handles the new global-drop-in backend in cleanup. - The legacy resolvectl per-link backend stays as a fallback, documented to require careful daemon bind_addr coordination. fips-gateway upstream pairing ----------------------------- - gateway.dns.upstream default changes from 127.0.0.1:5354 to [::1]:5354 to match the daemon's default bind. Linux IPv6 sockets bound to explicit ::1 do not accept v4-mapped traffic, so the old default would have caused the gateway's startup DNS reachability probe to time out and systemd to restart-loop the service. - Operators who set a non-default daemon `dns.bind_addr` must also set `gateway.dns.upstream` to match — documented inline. Documentation ------------- - packaging/common/fips.yaml and packaging/openwrt-ipk fips.yaml examples updated; rationale for the bind_addr choice and the daemon/gateway pairing recorded inline. Test coverage ------------- - testing/dns-resolver/test.sh: real-fipsd end-to-end scenario added. Builds fipsd in a Debian 12 builder image (cached), runs the daemon with a real TUN in a privileged container, configures DNS via the setup script, and asserts `dig @127.0.0.53 AAAA <npub>.fips` returns AAAA. Refactored as a parameterized helper running across Debian 12/13 and Ubuntu 22/24/26 (5 e2e scenarios). Backend-aware assertions: on systemd >= 258 the expected backend is dns-delegate; on older systemd it's global-drop-in. Strict content checks fail CI on any [::1]:5354 drift. fips-gateway also exercised in the debian12 scenario to lock the gateway-upstream pairing. Renamed all "fipsd" references to "fips" (project convention). - testing/deb-install/ (new harness): builds the actual .deb via cargo-deb in a Debian 12 builder image (cached), installs via apt across each target distro, verifies maintainer scripts, conffile placement, binary placement, and end-to-end .fips resolution after start. Also exercises fips-gateway against the installed daemon to verify the gateway/daemon default pairing on a real .deb path. - This is the test layer that was missing — the previous harness only verified config files were written, never that queries reached the daemon. Verified: dns-resolver 78/78 assertions, deb-install 55/55 assertions across all 5 distros (debian:12, debian:trixie, ubuntu:22.04, ubuntu:24.04, ubuntu:26.04). |
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|
34e00b9f6e |
Add Nostr-mediated overlay discovery and UDP NAT traversal (#53)
Optional peer discovery and NAT hole-punching path gated behind a new
`nostr-discovery` cargo feature. Nodes publish signed overlay endpoint
adverts to public Nostr relays, consume peer adverts to populate
fallback dial addresses, and use STUN-assisted UDP hole punching with
NIP-59 gift-wrap offer/answer signaling to establish direct UDP paths
between NATed peers. Once a punched socket is up, it is handed into
the existing FIPS UDP transport and the standard Noise/FMP session
stack takes over unchanged.
The cargo feature is in the default feature set
(`default = ["nostr-discovery"]`) so stock builds include it; a
build that explicitly disables default features (or selects a
feature set without `nostr-discovery`) does not link the nostr /
nostr-sdk crates and does not emit a no-op poll in the tick loop.
Runtime behavior is independently gated by
`node.discovery.nostr.enabled`, which defaults to false; if the
config enables Nostr on a non-feature build, startup logs a
warning and continues without it.
== Cargo feature and dependencies
- New cargo feature `nostr-discovery = ["dep:nostr", "dep:nostr-sdk"]`.
Not in the default feature set.
- New optional Linux-only dependencies: `nostr 0.44` (features: std,
nip59) and `nostr-sdk 0.44`. Gift-wrap unwrap is hand-rolled in
`src/discovery/nostr/signal.rs` rather than relying on the SDK's
rumor-author check, which FIPS sidesteps by trusting `seal.pubkey`
exclusively.
== Wire format
Overlay advert event: `kind 37195`, parameterized replaceable
(NIP-01 application-defined replaceable range 30000-39999), with
`d = "fips-overlay-v1"`. The digits visually spell FIPS (7=F, 1=I,
9=P, 5=S); a relay survey confirmed the kind is unused.
Advert content carries the version tag, endpoint list
(`udp|tcp|tor` + addr), optional signal-relay and stun-server
metadata, and `issuedAt` / `expiresAt` timestamps. Endpoint
`addr: "nat"` is the sentinel that triggers traversal on the peer
side. NIP-40 `expiration` tag bounds staleness on permanent
shutdown. Lifecycle relies on parameterized-replaceable
supersession; the daemon does not emit NIP-09 kind-5 deletes —
strict relays (Damus, Primal) race delete-against-replace and can
silently drop the replacement.
Gift-wrapped signal event: `kind 21059`. Punch packets carry magic
values `PUNCH_MAGIC` / `PUNCH_ACK_MAGIC`, a sequence number, and a
16-byte session hash.
== Discovery surface
- `src/discovery.rs` (always compiled)
- `EstablishedTraversal`: bound UDP socket + selected remote +
peer npub + optional transport name/config tuning overrides.
- `BootstrapHandoffResult`: returned on successful handoff —
allocated transport id, local/remote addrs, peer NodeAddr,
session id.
- `src/discovery/nostr/` (`#![cfg(feature = "nostr-discovery")]`)
- `types.rs`: wire and control types described above. `ADVERT_KIND`
constant. `BootstrapError` enumerates failure modes (disabled,
missing advert, missing NAT endpoint, no usable relays, invalid
advert, invalid npub, signal timeout, punch timeout, replay,
STUN failure, protocol, nostr, io, serde, event-parse).
- `runtime.rs`: `NostrDiscovery` coordinator. Owns the shared
nostr-sdk `Client`, subscribes to advert + signal event kinds,
maintains a bounded advert cache and a bounded seen-sessions
replay set, drains `BootstrapEvent::{Established, Failed}` for
the node to consume, exposes `update_local_advert`,
`request_connect`, `advert_endpoints_for_peer`,
`cached_open_discovery_candidates`, and `shutdown`.
- `signal.rs`: NIP-59 gift-wrap encode/decode. Outbound wraps are
built against per-attempt ephemeral keys; inbound events are
unwrapped against the node identity.
- `stun.rs`: RFC 5389/8489 Binding Request client with
XOR-MAPPED-ADDRESS parsing for both IPv4 and IPv6; used only to
observe the initiator's own reflexive address against its
locally configured STUN list (peer-advertised STUN is
informational, never an egress target).
- `traversal.rs`: per-attempt candidate-pair punch planner.
Allocates a fresh `0.0.0.0:0` UDP socket per attempt, enumerates
LAN-private and ULA interface addresses alongside the STUN
reflexive address, schedules probe/ack exchanges at the
configured interval for the configured duration, and picks the
first candidate pair that authenticates end-to-end.
Strategy ordering is Reflexive↔Reflexive first, then LAN, then
Mixed. The STUN-observed pair is the only candidate that's reliable
across arbitrary network topologies; trying it first prevents the
planner from latching onto a misleading host-candidate path before
the reflexive path gets a chance. There is no catch-all
Local↔Local strategy: a previous design that paired every local
host candidate from one side with every local host candidate from
the other could declare success on a one-way reachable asymmetric
L3 path (corporate VPN, Tailscale subnet route, overlapping private
address space), only for the FMP handshake to stall because the
return path didn't match. The legitimate `Lan` strategy still pairs
candidates that share a subnet.
== Configuration surface
`node.discovery.nostr.*` (`NostrDiscoveryConfig`), all `serde(default)`
with `deny_unknown_fields`:
- `enabled` (default false), `advertise` (default true)
- `advert_relays`, `dm_relays`, `stun_servers`: defaults are
`wss://relay.damus.io`, `wss://nos.lol`, `wss://offchain.pub`
for both relay lists, and Google / Cloudflare / Twilio for STUN.
Operators are expected to override for production. Other
verified-working public relays for reference:
`nostr.bitcoiner.social`, `nostr-pub.wellorder.net`,
`nostr.oxtr.dev`, `nostr.mom`.
- `app` (default `"fips-overlay-v1"`), `signal_ttl_secs` (120)
- `policy`: `NostrDiscoveryPolicy::{Disabled, ConfiguredOnly (default),
Open}` — controls whether advert-derived endpoints are consumed
only for peers carrying `via_nostr = true`, or also for
non-configured peers within a budget cap.
- `share_local_candidates` (default false) — when false, the offer's
`local_addresses` list is empty and peers see only the reflexive
address. Enable per-node only for genuinely same-LAN deployments;
off-by-default eliminates the misleading-path failure mode for
the common case where peers are not on the same broadcast domain.
- `open_discovery_max_pending` (64) — caps queued open-discovery
retries; bounded by available outbound slots.
- `max_concurrent_incoming_offers` (16) — semaphore against offer
spam; excess offers are debug-logged and dropped.
- `advert_cache_max_entries` (2048) and `seen_sessions_max_entries`
(2048) — bound memory under ambient relay volume; overflow
evictions are debug-logged.
- `attempt_timeout_secs` (10), `replay_window_secs` (300)
- `punch_start_delay_ms` (2000), `punch_interval_ms` (200),
`punch_duration_ms` (10000)
- `advert_ttl_secs` (3600), `advert_refresh_secs` (1800)
Per-peer and per-transport flags:
- `PeerConfig.via_nostr: bool` — when true (and Nostr is enabled),
advert-derived addresses are appended as fallback dial candidates
after static addresses for that peer.
- `PeerConfig.addresses` is now `serde(default)` and may be empty
when `via_nostr: true`; validation requires at least one of the
two to be present per peer, and the error message names the
peer's npub.
- `UdpConfig.advertise_on_nostr: Option<bool>` and
`UdpConfig.public: Option<bool>` — UDP transports can be
advertised either as direct `host:port` (public = true) or as the
`addr: "nat"` sentinel that triggers rendezvous on the peer side.
- `TcpConfig.advertise_on_nostr` and `TorConfig.advertise_on_nostr`
— TCP and Tor onion endpoints can be advertised as directly
reachable.
- A reserved peer address `transport: udp, addr: "nat"` parses without
special-casing in YAML and routes through the bootstrap runtime.
Cross-field validation (`Config::validate`, called from `Node::new`
and `Node::with_identity`):
- Any transport with `advertise_on_nostr = true` requires
`node.discovery.nostr.enabled = true`.
- Any peer with `via_nostr = true` requires
`node.discovery.nostr.enabled = true`.
- A non-public UDP advert (`advertise_on_nostr = true`,
`public = false` — i.e. `udp:nat`) additionally requires at least
one `dm_relay` and at least one `stun_server`.
Surfaced as `ConfigError::Validation`.
== Node integration
`src/node/lifecycle.rs` is the main integration point.
- At node start (after transports are up, before TUN), if Nostr is
enabled and the feature is compiled in, `NostrDiscovery::start` is
invoked, the initial local overlay advert is built from the live
transport set and published, and the runtime handle is stored.
- The rx tick loop calls `poll_nostr_discovery` (feature-gated both
at method definition and call site), which refreshes the local
advert, drains bootstrap events, adopts established traversals,
schedules retries for failed traversals, and — under `policy:
open` — enqueues outbound retries for non-configured peers
visible in the advert cache, bounded by
`open_discovery_max_pending` and the remaining outbound slots.
- Outbound peer dialing is refactored to `try_peer_addresses`, which
first exhausts the static address list in priority order and only
then appends advert-derived fallback addresses; both lists run
through the same `attempt_peer_address_list` code path. The
`udp:nat` sentinel address triggers `NostrDiscovery::request_connect`
for the peer instead of a direct dial and returns `Ok(())`.
- `build_overlay_advert` walks operational transports, consults
per-instance `UdpConfig` / `TcpConfig` / `TorConfig` (matching by
optional transport instance name), and emits an `OverlayAdvert`
including `signalRelays` and `stunServers` when any UDP endpoint
is advertised as NAT.
- `adopt_established_traversal` is the bootstrap handoff API:
allocates a new `TransportId`, constructs a `UdpTransport` with
the user-supplied (or default) `UdpConfig`, calls the new
`adopt_socket_async` to reuse the punched socket verbatim,
registers the transport in the normal transport map, records it
in `bootstrap_transports`, and calls `initiate_connection` so the
normal handshake path runs. On failure, the transport is stopped
and removed cleanly and the set membership is rolled back.
- On clean shutdown, `NostrDiscovery::shutdown` is awaited so
background tasks stop before transports are torn down. (The
advert is not explicitly retracted; NIP-40 expiration plus the
next refresh from any live publisher supersedes it.)
New `Node` fields:
- `nostr_discovery: Option<Arc<NostrDiscovery>>` (feature-gated).
- `bootstrap_transports: HashSet<TransportId>` — per-peer UDP
transports adopted from NAT traversal, cleaned up via
`cleanup_bootstrap_transport_if_unused` whenever the link,
connection, peer, or pending-connect referencing them is removed.
Retry and error surface:
- `RetryState.expires_at_ms: Option<u64>` — optional absolute expiry
for a retry entry. `pump_retries` drops expired entries with an
info log. Used for open-discovery retries, which expire at two
times the advert TTL.
- New `NodeError::BootstrapHandoff(String)` returned from
`adopt_established_traversal` when the underlying transport
adoption fails or local address discovery fails.
- New `ConfigError::Validation(String)`.
- A small refactor extracts `Node::now_ms()` and reuses it across
lifecycle, rx-loop tick, and timeout bookkeeping.
== UDP transport
`src/transport/udp/`:
- `UdpRawSocket::adopt(std::net::UdpSocket, recv_buf, send_buf)`:
adopts an externally bound socket, makes it non-blocking, applies
the configured buffer sizes (warning if the kernel clamps), and
reports the resulting local address. Preserves the NAT mapping —
no rebind.
- `UdpTransport::adopt_socket_async(std::net::UdpSocket)`: the
`start_async` analogue for an already-bound socket, wiring the
async socket and recv task exactly as the fresh-bind path would.
- `Drop` impl for `UdpTransport`: if a transport is dropped while
still holding a recv task or socket (for example on error
teardown), aborts the task, clears the socket, and emits a debug
log so the cleanup is visible in tracing rather than silent.
== Logging and observability
Default `EnvFilter` demotes third-party relay-pool DEBUG output to
TRACE-only: `nostr_relay_pool`, `nostr_sdk`, and `nostr` are pinned
at INFO when our level is anything below TRACE, and at TRACE when
our level is TRACE — so the raw frames are still reachable when
explicitly asked for. RUST_LOG continues to override completely.
Concise one-line DEBUG events are emitted at the meaningful points
in the discovery / hole-punch sequence:
- `advert: published` (event id, relay count, endpoints, ttl)
- `advert: peer cached` (notify-loop ingress for non-self)
- `advert: resolved` (cache hit / relay fetch outcome)
- `traversal: initiator starting`
- `traversal: initiator STUN observed` (reflexive, local count)
- `traversal: offer sent` (session id, relay count, event id)
- `traversal: answer received` (accepted, reflexive, local)
- `traversal: initiator punch succeeded` (remote addr)
- `traversal: offer received` (responder side)
- `traversal: responder STUN observed`
- `traversal: answer sent`
- `traversal: responder punch succeeded`
Npubs are shortened to `npub1<4>..<4>` and event/session ids to
their first 8 hex characters.
Other operator-facing logs:
- `UdpTransport` adoption and drop paths log at info / debug.
- `adopt_established_traversal` logs at debug on entry and info on
successful return, tagged with peer npub, session id, transport
id, and both socket endpoints, so the bootstrap handoff is
traceable end-to-end alongside the `UdpTransport::drop` log.
- `cleanup_bootstrap_transport_if_unused` logs at debug when the
reference-count check drops an adopted transport.
- `connect_peer` tags its entry `debug!` with `peer_npub` so
downstream STUN, punch, and handshake logs for the same peer
correlate for operators.
- Advert-cache and seen-sessions overflow evictions log at debug so
mis-sized caps are visible under ambient relay volume.
- Gift-wrap unwrap failures on `SIGNAL_KIND` events log at trace
(hot path: fires for every unrelated signal event on the same
relay).
- Traversal-offer handler failures log at debug. Expected conditions
such as punch timeout on symmetric NAT are covered there; real
problems are reported upstream via `BootstrapEvent::Failed`.
- Inbound-offer rate-limit messages name the governing config field
(`max_concurrent_incoming_offers`) and state that the offer was
rate-limited rather than failing.
== Tests
- 18 new unit tests in `src/discovery/nostr/tests.rs` covering advert
encoding, signal envelope round-trip, STUN parsing, punch-packet
codec, and replay-window enforcement. Run under the
`nostr-discovery` feature.
- Config-validation tests in `src/config/mod.rs` covering the three
cross-field invariants and YAML parsing of the full
`node.discovery.nostr` block plus `peers[].via_nostr`, empty
`addresses` with `via_nostr: true`, and a `udp: nat` address.
- `src/node/tests/bootstrap.rs` integration tests that drive a
synthetic traversal (bound UDP socket pair + synthetic peer
identity) through `adopt_established_traversal` and assert the
Noise handshake completes over the adopted socket.
- Punch-planner tests assert reflexive-before-LAN ordering and that
same-LAN scenarios still include the LAN target in the plan.
- `testing/nat/` Docker NAT lab harness:
- Local `strfry` relay, local STUN responder, and one or two
router containers performing `iptables` NAT.
- Node LAN interfaces are provisioned with explicit `veth` pairs
injected into the node and router namespaces so every packet
traverses the router namespace (plain Docker bridges are not
used for the LAN).
- `cone` scenario: both peers behind full-cone-emulation NAT
(SNAT with source-port preservation, inbound DNAT back to the
single LAN host regardless of remote source); asserts UDP
traversal succeeds and link remote addresses are on the router
WAN subnet.
- `symmetric` scenario: `MASQUERADE --random-fully`; asserts UDP
traversal fails and TCP fallback converges over router-
published WAN addresses.
- `lan` scenario: both peers share a LAN subnet; asserts LAN
addresses are preferred over reflexive ones.
- Cleanup tears down all profile-gated services
(`--profile cone --profile symmetric --profile lan`) so no
orphan containers survive a run.
- `testing/scripts/build.sh` builds the Docker test image with
`--features "tui nostr-discovery"` by default so NAT-harness
binaries include bootstrap support.
== CI
- Linux release build and nextest unit-test job both use
`--features "gateway nostr-discovery"` so the feature-gated code
and its unit tests compile and run in CI.
- Three new integration matrix entries (`nat-cone`, `nat-symmetric`,
`nat-lan`) invoke `testing/nat/scripts/nat-test.sh`, collect
`docker compose logs` on failure, and always stop containers.
== Packaging and operations
- `packaging/common/fips.yaml` ships a fully commented
`node.discovery.nostr.*` block, plus documented
`advertise_on_nostr` / `public` examples under the UDP transport,
an `advertise_on_nostr` example under TCP, and a `via_nostr: true`
example under the static peer section with both a direct
`host:port` UDP address and a `udp: nat` fallback.
- `.github/workflows/package-openwrt.yml`: NIP-94 release event
publishes target the new default relay set.
== Documentation
- `README.md`: overlay discovery + NAT traversal moved from
"Near-term priorities" into "What works today".
- `docs/design/fips-intro.md`: rewrites the paragraphs that
previously described Nostr discovery and NAT traversal as future
work; describes the shipped mechanism and the feature gate.
- `docs/design/fips-transport-layer.md`: drops the "(future
direction)" qualifier from the Nostr Relay Discovery section,
expands with the `udp:nat` advertisement and bootstrap handoff
description, and updates the Current State callout.
- `docs/design/fips-mesh-layer.md`: notes that mid-session NAT
rebinding (roaming) and initial NAT traversal (Nostr path) are
distinct mechanisms.
- `docs/design/fips-configuration.md`: documents the full
`node.discovery.nostr.*` surface, including the three resource
caps and `share_local_candidates`.
- `docs/design/fips-nostr-discovery.md`: design and configuration
reference for the shipped mechanism, including the empty-
`addresses`-with-`via_nostr` shorthand.
- `docs/proposals/nostr-udp-hole-punch-protocol.md`: adds an
Implemented status callout, clarifies that the punch socket is
per-peer and per-attempt rather than shared with the application
listener, aligns field names with the shipped JSON
(`sessionId`, `issuedAt` / `expiresAt`, `reflexiveAddress`,
`localAddresses`, `stunServer`), sets the `d`-tag to
`fips-overlay-v1`, names the kind as 37195, and notes that
advertised STUN entries are informational.
- `docs/proposals/README.md`: adds a Status column and marks the
hole-punching proposal Implemented.
- `CHANGELOG.md`: Unreleased > Added entry covering the discovery
path, STUN/punch path, configuration surface, and Docker NAT lab.
Co-authored-by: Johnathan Corgan <johnathan@corganlabs.com>
|
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Johnathan Corgan
|
1e3b2c319e |
testing: rekey settle past drain window + stale tooling references
- testing/static/scripts/rekey-test.sh: bump REKEY_SETTLE from 5s to 12s so post-rekey ping_all samples are taken after the 10s old- session drain window has closed (DRAIN_WINDOW_SECS in handlers/rekey.rs). The 5s sample window straddled the drain, occasionally catching old-session decrypts mid-cutover and producing spurious ping failures. - testing/lib/log_analysis.py: discovery-succeeded match string is "proof verified, route cached" (the wording in handlers/discovery.rs); the regex looked for the older "caching route" wording, so the chaos analysis summary always reported `Succeeded: 0` regardless of how many successes the raw node logs actually showed. - testing/scripts/build.sh: drop the second cargo invocation that passed `--features gateway --bin fips-gateway`. PR #79 removed the `gateway` cargo feature in favor of platform cfg gates, so this invocation now fails with `the package 'fips' does not contain this feature: gateway`. The first cargo build already produces fips-gateway as a workspace binary on every supported target. |
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Johnathan CorganandGitHub
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cbc78091ab |
Rationalize cargo feature and platform-gate surface (#79)
Drop the `tui`, `ble`, and `gateway` cargo features and replace them with platform cfg gates. Plain `cargo build` now produces every subsystem appropriate for the target platform with no feature flags required. Motivation: - `default = ["tui", "ble"]` broke `cargo build` on macOS and Windows because `ble` pulled in `bluer` (BlueZ, Linux-only). Every non-Linux packager needed `--no-default-features`. - The feature flags on `ble` and `gateway` were redundant with their platform-gated deps (`bluer`, `rustables`). The parallel gating was inconsistent and error-prone. - `tui` feature protected against a ratatui binary-size concern that no longer applies in 2026. Cargo.toml: - Remove `tui`, `ble`, `gateway` features; `default = []`. - Promote `ratatui` to a non-optional top-level dependency. - Move `rustables` from top-level optional into the Linux target block, non-optional. - Split `bluer` into its own target block with `cfg(all(target_os = "linux", not(target_env = "musl")))` — BlueZ isn't available on musl router targets and `libdbus-sys` doesn't cross-compile to musl without pkg-config sysroot setup. - Drop `required-features` from the `fipstop` and `fips-gateway` `[[bin]]` entries. build.rs: - Emit a `bluer_available` custom cfg when `target_os == "linux"` and `target_env != "musl"`, for use in place of the verbose full predicate in source cfg gates. Source: - Replace every `#[cfg(feature = "gateway")]` with `#[cfg(target_os = "linux")]`. Gateway code works on both glibc and musl Linux (rustables is fine on musl). - Replace every `#[cfg(feature = "ble")]` with `#[cfg(bluer_available)]`. BLE-specific code (BluerIo module, bluer type conversions, BLE transport instance creation, resolve_ble_addr) is excluded on musl and non-Linux. Generic `BleAddr`, `BleIo` trait, `MockBleIo`, and `BleTransport<I>` still compile on all targets. - `src/bin/fips-gateway.rs`: always compiled, but `main()` is gated to Linux. Non-Linux stub exits 1 with a diagnostic. Existing non-Linux packaging scripts don't ship it, so the stub binary sits unused. Packaging and CI: - Drop `--features` and `--no-default-features` flags from every packaging script and workflow. Defaults now match each platform's capabilities. - AUR `fips-git` automatically aligns with stable `PKGBUILD` (both build with defaults). Verified: `cargo build --release` with no flags produces all four binaries on glibc Linux; all unit and integration tests pass across Linux/macOS/Windows/OpenWrt (musl) in CI. |
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 Alex XieandJohnathan Corgan
|
745b523ac6 |
Add peer ACL enforcement with reloadable allow/deny files (#50)
Implement TCP Wrappers-style peer access control using /etc/fips/peers.allow and /etc/fips/peers.deny files. Evaluation order: allow overrides deny, default permit when no files exist. Three enforcement points: outbound connect (before dialing), inbound handshake (msg1 receipt, after restart/rekey classification), and outbound handshake completion (msg2, before peer promotion). Files support npub, hex pubkey, host alias, and ALL wildcard entries with automatic mtime-based reload. Adds fipsctl acl show query, 954-line acl module with unit tests, and a 6-node Docker integration harness (testing/acl-allowlist/) exercising insider, outsider, and allowed-remote scenarios. CI matrix entry included. Closes #50 Co-authored-by: Johnathan Corgan <johnathan@corganlabs.com> |
||
 SatsAndSportsandGitHub
|
5087ef9a95 |
Fix testing docker build by staging fips-gateway (#69)
The unified test image always expects fips-gateway in testing/docker, but testing/scripts/build.sh only copied fips, fipsctl, and fipstop. Build and stage fips-gateway explicitly so local Docker test builds match CI. |
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|
Johnathan Corgan
|
213c0e87c3 |
Implement inbound mesh port forwarding
Mesh peers can now reach a configured host:port on the gateway's LAN
via static port-forward rules on fips-gateway. Mirror of the outbound
LAN gateway (IDEA-0079 / TASK-2026-0056).
Config: new gateway.port_forwards list of { listen_port, proto,
target } entries. Targets are SocketAddrV6 — IPv4 is rejected at
parse time. Validation rejects zero listen ports and duplicate
(listen_port, proto) pairs.
NAT: NatManager gains a port_forwards field and set_port_forwards()
setter, rebuilt in the same atomic rustables batch as the address
mappings. Each forward emits a prerouting DNAT rule keyed on
(iifname fips0, nfproto ipv6, l4proto, tcp/udp dport) that rewrites
destination address and port via Nat::with_ip_register +
with_port_register. When any forwards are configured, a single
LAN-side masquerade is installed on (iifname fips0, oifname
lan_interface, nfproto ipv6) so the LAN host sees the gateway as
source and replies flow back through conntrack. This rule is
distinct from the existing oifname fips0 masquerade that serves the
outbound pool.
Binary: fips-gateway validates port_forwards at startup and calls
set_port_forwards after NatManager construction; startup failure
cleans up the nftables table before exiting.
Test: extend testing/static/scripts/gateway-test.sh with Phase 7
that runs a marker HTTP server on the LAN-side client (fd02::20:8080)
and, from the mesh peer, curls the gateway's fips0 address on port
18080 to exercise the full DNAT + LAN masquerade path. The
LAN-side HTTP server is started with 'docker exec -d' plus a
bind-ready poll on ss; 'docker exec bash -c "cmd &"' does not
keep the child alive past the exec session even with nohup.
Test-infra: ci-local.sh now builds/clippies/tests with
--features gateway, matching GitHub CI. Without this the release
fips-gateway binary silently stays stale across runs, since
cargo build --release alone does not compile the gateway bin.
Verified locally: cargo test --features gateway --lib (991 pass),
clippy + fmt clean, full testing/ci-local.sh green (21/21 suites
in 8m36s, including the new gateway Phase 7).
|
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|
Johnathan CorganandGitHub
|
fe205e74de |
Multi-backend DNS configuration for .fips domain (#58)
Replace the resolvectl-only fips-dns.service with a detection script that configures whichever DNS resolver is available: 1. systemd dns-delegate (systemd >= 258, declarative drop-in) 2. systemd-resolved via resolvectl (most systemd distros) 3. dnsmasq (standalone) 4. NetworkManager with dnsmasq plugin 5. Warning with manual instructions if none found Service reloads are non-fatal — config is written and the backend is recorded even if the reload fails, preventing state file cleanup issues under set -e. Teardown reads the recorded backend from /run/fips/dns-backend and reverses the configuration, or cleans up all possible backends if the state file is missing. Includes a Docker-based test harness (testing/dns-resolver/test.sh) covering all five backends across Debian 12, Debian 13, Fedora, and bare systems. Fixes #52. |
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|
Johnathan Corgan
|
68dafbc72a | Add testing/.gitignore for staged binaries and generated artifacts | ||
|
Johnathan Corgan
|
0d4ffc61f0 |
Fix gateway test HTTP server port mismatch
The entrypoint HTTP server was binding port 80 but gateway-test.sh curls port 8000. Maint already had 8000; the wrong port was introduced during a merge to master. |
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|
Johnathan Corgan
|
6196307f0e |
Merge branch 'maint'
# Conflicts: # src/bin/fips.rs # src/bin/fipstop/app.rs # src/config/mod.rs # src/config/node.rs # src/config/transport.rs # src/mmp/receiver.rs # src/mmp/sender.rs # src/node/handlers/handshake.rs # src/node/handlers/rekey.rs # src/node/lifecycle.rs # src/node/mod.rs # src/transport/ethernet/socket.rs # src/transport/mod.rs # src/upper/tun.rs |
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Johnathan Corgan
|
68bdcb2c75 | Add cargo fmt --check to CI and local CI | ||
 Origami74
|
e693f4fb7e |
Add macOS support, fix bloom filter routing and MMP intervals
macOS platform: - Platform-native TUN interface management with shutdown pipe - Raw Ethernet transport with macOS socket backend (socket_macos.rs) - EthernetTransport and TransportHandle::Ethernet ungated from Linux-only - macOS .pkg packaging (build-pkg.sh, launchd plist, uninstall script) - CI: macOS build and unit test jobs; x86_64 cross-compiled from macos-latest via rustup target add x86_64-apple-darwin Gateway feature flag: - New opt-in `gateway` Cargo feature activates optional `rustables` dep - `pub mod gateway` and `Config.gateway` gated behind the feature so macOS builds never pull in Linux-only nftables bindings - `fips-gateway` bin has `required-features = ["gateway"]` - All Linux/OpenWrt/AUR packaging passes `--features gateway` CI / packaging: - package-linux, package-macos, package-openwrt now trigger on push to master/maint/next and on pull requests; release uploads remain tag-gated - Bloom filter routing fix: fall through to tree routing when no candidate is strictly closer - MMP intervals: raise MIN to 1s / MAX to 5s with 5-sample cold-start phase |
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|
Johnathan Corgan
|
60e5fefb1f |
Implement outbound LAN gateway
Add fips-gateway binary: a separate daemon that allows unmodified LAN hosts to reach FIPS mesh destinations via DNS-allocated virtual IPs and kernel nftables NAT. Gateway DNS resolver: forwarding proxy on [::]:53 that intercepts .fips queries, forwards to daemon resolver (localhost:5354), allocates virtual IPs from pool, returns AAAA records. Always sends AAAA upstream regardless of client query type, returns proper NODATA for non-AAAA. Virtual IP pool: fd01::/112 pool with state machine lifecycle (Allocated → Active → Draining → Free), TTL-based reclamation, conntrack integration for session tracking. NAT manager: nftables DNAT/SNAT rules via rustables netlink API, per-mapping rule lifecycle, fips0 masquerade for LAN client source address rewriting. Network setup: local pool route, proxy NDP for virtual IPs on LAN interface, IPv6 forwarding validation. Control socket at /run/fips/gateway.sock with show_gateway and show_mappings queries. fipstop Gateway tab with pool summary gauge and mappings table. Gateway config section in fips.yaml with pool CIDR, LAN interface, DNS upstream, TTL, and grace period settings. Design doc at docs/design/fips-gateway.md. Integration test (testing/static/scripts/gateway-test.sh): three containers verifying DNS resolution, end-to-end HTTP, NAT state, TTL expiration, SERVFAIL fallback, and clean shutdown. |
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|
Johnathan Corgan
|
864a8bcc9e | Merge branch 'maint' | ||
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Johnathan Corgan
|
15628e5b41 |
Improve ping test convergence by checking all nodes
Wait for all nodes to reach their expected peer counts instead of only checking a single node. This prevents false failures on slower CI runners where remote nodes (especially node E in mesh/chain topologies) take longer to establish all links. |
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Johnathan Corgan
|
adfbeb2348 | Merge branch 'maint' | ||
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Johnathan Corgan
|
6633d22132 |
Improve ping test convergence by checking all nodes
Wait for all nodes to reach their expected peer counts instead of only checking a single node. This prevents false failures on slower CI runners where remote nodes (especially node E in mesh/chain topologies) take longer to establish all links. |
||
 joandJohnathan Corgan
|
8e38d889fa | testing: stabilize rekey integration timing | ||
|
Johnathan Corgan
|
89352d3218 |
Add BLE L2CAP transport with scan-based auto-connect
BLE transport implementation using L2CAP Connection-Oriented Channels (SeqPacket mode) via the bluer crate, behind cfg(feature = "ble"). Core transport: - BleTransport<I> generic over BleIo trait (BluerIo prod, MockBleIo test) - Connection pool with priority eviction (static > discovered, max 7) - Connect-on-send via connect_inline() matching TCP behavior - Per-connection receive loops with pool cleanup on disconnect Discovery and probing: - Combined scan_probe_loop using select! over scanner events and a BinaryHeap delay queue with per-entry random jitter (0-5s) to prevent herd effects when multiple nodes see the same beacon simultaneously - Pre-handshake pubkey exchange ([0x00][pubkey:32]) for IK identity - Cross-probe tie-breaker: smaller NodeAddr's outbound wins (same convention as FMP/FSP rekey dual-initiation) - Probed peers reported to DiscoveryBuffer; pool fills through normal node-layer auto-connect -> send_async -> connect_inline path Beacon management: - Periodic advertising: 1s burst every 30s (configurable via beacon_interval_secs / beacon_duration_secs) - FIPS service UUID for scan filtering Configuration (all fields optional with defaults): - adapter, psm, mtu, max_connections, connect_timeout_ms - advertise, scan, auto_connect, accept_connections - beacon_interval_secs (30), beacon_duration_secs (1) Hardware validated with two BLE nodes: - 2048-byte MTU, ~60-160ms RTT, zero-config auto-connect - BLE spike tool at testing/ble/ for standalone adapter validation 42 unit tests + 4 node-level integration tests, all CI-compatible via MockBleIo (no hardware required). tokio test-util added for time-dependent scan/probe tests. |
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Johnathan Corgan
|
fc8c0dce15 |
Increase rekey test convergence wait from 5s to 15s
Phase 1 pre-rekey baseline was failing intermittently on CI runners because 5s wasn't enough for multi-hop discovery (B→D requires B→C→D). The mesh always converged by Phase 3, confirming this was purely a timing issue. |
||
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Johnathan Corgan
|
71e2955da0 |
Fix rekey integration test after logging demotion (b8fbecc)
The rekey test greps container logs for initiator cutover messages that were demoted to debug level. Override RUST_LOG in the rekey profile to enable debug for fips::node::handlers::rekey so the test assertions can find them. |
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|
Johnathan Corgan
|
6aff490251 |
Improve discovery protocol: bloom-guided tree routing with fallback
Replace discovery flooding with bloom-filter-guided tree routing: lookups sent only to tree peers (parent + children) whose bloom filter contains the target. If no tree peer matches, fall back to non-tree peers with bloom matches before dropping the request. This produces single-path forwarding through the spanning tree (90% traffic reduction) while recovering from dead ends caused by stale bloom filters, tree restructuring, or transit node failures. Remove visited bloom filter from LookupRequest wire format (-257 bytes per request). Tree routing is inherently loop-free; request_id dedup handles edge cases during tree restructuring. Add response- forwarded flag to prevent response routing loops from convergent request paths. Add originator-side exponential backoff (30s base, 300s cap) after lookup timeouts and bloom misses. Backoff resets on topology changes (parent switch, new peer, first RTT, reconnection). Add transit-side per-target rate limiting (2s minimum interval) for forwarded lookups as defense-in-depth. Add discovery retry within the timeout window (default: send at T=0, retry at T=5s, fail at T=10s) to compensate for single-path fragility. Lookups with zero eligible tree peers fail immediately. Improve discovery logging: promote key events to info (initiation, success, timeout with failure count). Add debug logging for dedup, pending packet retry, backoff suppression, forward rate limiting, and backoff reset. New config: discovery.backoff_base_secs, backoff_max_secs, forward_min_interval_secs, retry_interval_secs, max_attempts. New stats: req_backoff_suppressed, req_forward_rate_limited, req_bloom_miss, req_no_tree_peer, req_fallback_forwarded. Removed: req_already_visited, visited bloom filter. |
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|
Johnathan Corgan
|
fed6cc6987 |
Fix chaos sim DNS pipeline, ephemeral npub tracking, and analysis
Three infrastructure bugs fixed: - DNS resolution never populated the identity cache because Docker overwrites /etc/resolv.conf at container start. Fix: bind-mount resolv.conf in the chaos compose template, matching the static and sidecar test configs. - Traffic generator used config-time npubs for iperf3 targets, but ephemeral nodes generate fresh keypairs at startup. Fix: share the peer churn manager's runtime npub cache with the traffic manager. - Log analysis had no discovery counters and used wrong patterns. Fix: add discovery section with correct log message matching. Also adds timestamped output directories (YYYYMMDD-HHMMSS-scenario), coord_ttl_secs override in maelstrom.yaml, FIPS_SIM_OUTPUT env var support, and maelstrom-sparse scenario for sparse topology testing. |
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|
Johnathan Corgan
|
5053cf673d |
Add connect/disconnect control commands and maelstrom chaos scenario
Add runtime peer management to the FIPS daemon via control socket commands, and a new chaos simulation scenario that exercises dynamic topology mutation with ephemeral node identities. Daemon (connect/disconnect commands): - Extend control socket Request with optional params field - Add commands.rs module for mutating command dispatch, separate from read-only queries - Add api_connect() on Node: builds ephemeral PeerConfig (no auto- reconnect), pre-seeds identity cache, reuses initiate_peer_connection - Add api_disconnect() on Node: calls remove_active_peer(), clears retry_pending to suppress reconnection - Route non-show_* commands to async command dispatch in rx_loop fipsctl CLI: - Add Connect and Disconnect subcommands accepting npub or hostname - Resolve hostnames from /etc/fips/hosts before sending to daemon - Refactor socket I/O into reusable send_request helper Chaos simulator (maelstrom scenario): - Add PeerChurnManager: periodically disconnects a random active link and connects a random unconnected node pair via control socket - Add send_command() to control.py using base64-encoded JSON payloads to avoid shell quoting issues in docker exec - Add PeerChurnConfig to scenario with interval and ephemeral_fraction - Ephemeral identity support: nodes configured without nsec generate fresh keypairs on restart; simulator queries show_status for new npub and updates its cache via on_node_restart callback - Add maelstrom.yaml: all chaos dimensions (netem, link flaps, node churn, peer topology churn, traffic) with 50% ephemeral identity |
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|
Johnathan Corgan
|
8d51dbd268 |
Move K8s sidecar from testing/ to examples/
The K8s sidecar is a standalone example, not a test harness — it has no CI integration unlike testing/sidecar/. Move it to examples/ alongside sidecar-nostr-relay/ where it belongs. Update internal path references in Dockerfile, build.sh, and README. |
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|
Johnathan Corgan
|
9e63b42bd9 |
Consolidate Docker test harness infrastructure
Replace 4 near-identical per-harness Docker setups with unified shared infrastructure. Net result: -463 lines across 55 files, faster CI (8.5 min vs ~13.5 min), 14 scenarios (down from 21). Unified Docker image (testing/docker/): - Single Dockerfile (trixie-slim) with FIPS_TEST_MODE env var for mode dispatch: default, chaos, sidecar, tor-socks5, tor-directory - Single entrypoint.sh with conditional logic per mode - Replaces 5 Dockerfiles, 3 entrypoints, 4 resolv.conf copies Shared build and libraries (testing/scripts/, testing/lib/): - testing/scripts/build.sh: single build script with macOS zigbuild support, replaces 4 per-harness copies - testing/lib/derive_keys.py: shared key derivation module, replaces 3 copies of derive-keys.py - testing/lib/log_analysis.py: shared log analysis extracted from chaos sim/logs.py, with CLI interface and rekey cutover tracking - testing/lib/wait-converge.sh: shared convergence wait helpers (wait_for_links, wait_for_peers) using fipsctl JSON polling Scenario consolidation: - Remove 7 redundant scenarios: tcp-chain (subsumed by tcp-mesh), tcp-only (subsumed by tcp-mesh), chaos-10 (replaced by churn-mixed --nodes 10), churn-10/churn-20/churn-20-mixed (subsumed by parameterized churn-mixed), cost-mixed-7node (overlaps mixed-technology) - Add churn-mixed scenario with --nodes flag for scale testing - Reduce idle scenario durations: smoke-10 60s→30s, ethernet-only 90s→30s, cost-avoidance 120s→45s, depth-vs-cost 120s→45s, bottleneck-parent 120s→60s, mixed-technology 180s→90s CI updates: - ci-local.sh: unified image build, structured chaos suite entries with per-scenario flags, --skip-build for sidecar - ci.yml: shared binary install + image build step, updated scenario matrix, chaos_flags support for parameterized scenarios - Add tcp-mesh and congestion-stress to CI matrix - Static ping test uses active peer convergence detection instead of hardcoded 5s sleep Chaos infrastructure improvements (from discovery-rework branch): - Pre-built Docker image instead of per-service build at scale - --nodes flag in chaos.sh for runtime topology size override |
||
 Kieran
|
8c349f524e |
Add Kubernetes sidecar deployment
Adds a complete Kubernetes sidecar setup under testing/k8s/ that runs FIPS as a sidecar container, injecting the mesh TUN interface (fips0) into any co-located app container via shared pod network namespace. - Multi-stage Dockerfile builds fips and fipsctl from source (debian trixie / rust slim-trixie), producing a minimal runtime image with iproute2, iptables, dnsmasq, and the two binaries - entrypoint.sh generates fips.yaml from environment variables, rewrites /etc/resolv.conf to route .fips DNS through dnsmasq, applies optional iptables isolation, clamps TCP MSS, then starts dnsmasq and execs the daemon - pod.yaml annotated example Pod manifest with Secret, sysctl tuning, readiness/liveness probes, and resource limits - scripts/build.sh convenience wrapper for docker build - testing/k8s/.dockerignore keeps the build context small - README.md usage guide covering quick start, isolation modes, env vars, multi-peer JSON config, troubleshooting |
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|
Johnathan Corgan
|
959134657f |
Fix FSP rekey cutover race and MMP metric discontinuity
The FSP XK rekey handshake has a race condition where the initiator can cut over (K-bit flip) and send data encrypted with the new session before msg3 reaches the responder. The responder has no pending session yet, so K-bit detection fails and packets are dropped. Defer FSP initiator cutover by 2 seconds after handshake completion (FSP_CUTOVER_DELAY_MS) to give msg3 time to traverse the mesh. FMP (IK, 2 messages) is unaffected since the responder completes during msg1 processing. Also fix MMP metric corruption after rekey cutover: the new session starts with counter 0 but MMP state carries highest_counter and GapTracker.expected_next from the old session, producing false reorder counts, jitter spikes, and invalid OWD trends. Add reset_for_rekey() methods that clear counter-dependent state while preserving RTT estimates. Additional fixes: - Remove stale peers_by_index entry on abandon_rekey error path - Replace redundant peers_by_index inserts with debug assertions verifying the pre-registration invariant - Tighten rekey integration test to zero tolerance (was 4 failures) |
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|
Johnathan Corgan
|
6c90cf6c02 |
Implement Tor transport with operator visibility
Add TorTransport in src/transport/tor/ supporting three operating modes: Outbound (socks5 mode): - Non-blocking SOCKS5 connect via tokio-socks with per-destination circuit isolation (IsolateSOCKSAuth) - TorAddr enum for .onion and clearnet address types - Connection pool with per-connection receive tasks, reuses TCP stream FMP framing - connect_async()/connection_state_sync()/promote_connection() follow the same non-blocking polling pattern as TCP transport Inbound (directory mode — recommended for production): - Tor manages the onion service via HiddenServiceDir in torrc - FIPS reads .onion address from hostname file at startup - No control port needed — enables Tor Sandbox 1 (seccomp-bpf) - Accept loop mirrors TCP pattern with DirectoryServiceConfig Monitoring (control_port mode and optional in directory mode): - Async control port client supporting TCP and Unix socket connections via Box<dyn AsyncRead/Write> trait objects - AUTHENTICATE with cookie or password auth - 8 GETINFO queries: bootstrap, circuits, traffic, liveness, version, dormant state, SOCKS listeners - Background monitoring task polls every 10s, caches TorMonitoringInfo in Arc<RwLock> for synchronous query access - Bootstrap milestone logging (25/50/75/100%), stall warning (>60s), network liveness transitions, dormant mode entry - Directory mode optionally connects to control port when control_addr is configured (non-fatal on failure) Operator visibility: - show_transports query exposes tor_mode, onion_address, tor_monitoring (bootstrap, circuit_established, traffic, liveness, version, dormant) - fipstop transport detail view: Tor mode, onion address, SOCKS5/control errors, connection stats, Tor daemon status section - fipstop table view: tor(mode) label with truncated onion address hint Security hardening: - Per-destination circuit isolation via IsolateSOCKSAuth - Unix socket default for control port (/run/tor/control) - Reference torrc with HiddenServiceDir, VanguardsLiteEnabled, ConnectionPadding, DoS protections (PoW + intro rate limiting) Config: - TorConfig with socks5, control_port, and directory modes - DirectoryServiceConfig: hostname_file, bind_addr - control_addr, control_auth, cookie_path, connect_timeout, max_inbound_connections Testing: - 69 unit + integration tests with mock SOCKS5 and control servers - Docker tests: socks5-outbound (clearnet via Tor) and directory-mode (HiddenServiceDir onion service) Documentation: - Transport layer design doc: Tor architecture, directory mode - Configuration doc: Tor config tables and examples |
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|
Johnathan Corgan
|
f37eb4b846 |
Fix documentation drift from recent feature additions
Update 9 documentation files to match current implementation: - Add missing rekey config section (node.rekey.*) and host mapping section to fips-configuration.md - Update Ethernet frame format from [type:1][payload] to [type:1][length:2 LE][payload] in wire-formats and transport docs - Fix Ethernet effective MTU from interface-1 to interface-3 - Mark rekey as Implemented in mesh-layer and session-layer status tables - Change TCP default port examples from 443 to 8443 - Add rekey, persistent identity, host mapping, mesh size estimation to README features and status sections - Update chaos scenario count from 16 to 20, add rekey topology to static test docs |
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|
Johnathan Corgan
|
31c0b2c969 |
Tolerate transient rekey cutover failures in integration test
Phase 3 (post-first-rekey connectivity) can see brief disruptions while links are mid-cutover. Add a 5s settle time after the rekey wait and allow up to 4 transient pair failures in Phase 3. Phase 5 remains strict, ensuring full recovery after the second rekey cycle. |
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Johnathan Corgan
|
aa53da061f | Add local CI runner script and gitignore fipstop in test dirs | ||
|
Johnathan Corgan
|
ead91c75da |
Fix public node npub in mesh-public topology and sidecar config
Update the external pub node (vps-chi at 217.77.8.91) to use its real persistent npub instead of a fabricated test key. Remove the unnecessary nsec from the external node definition. |
||
|
Johnathan Corgan
|
bf117df0ca |
Add periodic Noise rekey with fresh DH for forward secrecy (FMP + FSP)
Implement periodic full rekey at both protocol layers using fresh DH key exchanges. Uses the existing K-bit flag (FLAG_KEY_EPOCH / FSP_FLAG_K) to coordinate cutover between peers. FMP layer (IK pattern): - ActivePeer gains rekey state: pending/previous sessions, K-bit epoch tracking, drain window, dampening timer - Handshake state stored on ActivePeer with msg1 sent on existing link - Encrypted frame handler detects K-bit flips, promotes pending sessions, falls back to previous session during drain - Handshake handlers distinguish rekey from new connections using addr_to_link lookup with identity-based fallback - Free all session indices (current, rekey, pending, previous) on peer removal FSP layer (XK pattern): - SessionEntry gains parallel rekey fields with XK-specific state for the 3-message handshake - Route availability check before FSP rekey initiation - Encrypted session handler adds K-bit flip detection and dual-session decrypt fallback - SessionSetup/Ack/Msg3 handlers extended for rekey paths Defense-in-depth: - Consecutive decryption failure detector (threshold=20) triggers forced peer removal instead of waiting for link-dead timeout - Identity-based rekey detection as fallback when addr_to_link doesn't match (e.g., TCP ephemeral ports) Configuration: RekeyConfig with enabled flag, after_secs (default 120), and after_messages (default 65536) thresholds. Logging: info for successful K-bit cutover completions, warn for failures, debug for intermediate handshake steps, trace for routine operations (resends, drain cleanup). Rekey lifecycle: 1. Timer/counter fires -> initiator starts new handshake 2. Old session continues handling traffic during handshake 3. Handshake completes -> initiator cuts over, flips K-bit 4. Responder sees flipped K-bit -> promotes new session 5. Both keep old session for 10s drain window 6. After drain, old session discarded Integration test: Docker-based multi-phase test exercising both FMP and FSP rekey with aggressive timers (35s). Verifies connectivity across all 20 directed pairs survives two consecutive rekey cycles. Includes rekey topology, docker-compose profile, and CI matrix entry. Increase ping test convergence wait from 3s to 5s for CI reliability. |
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Johnathan Corgan
|
56d39f223b |
Add ECN congestion signaling and transport congestion detection
Implement hop-by-hop ECN congestion signaling through the FMP layer, transport-level congestion detection via kernel drop counters, and chaos harness integration for end-to-end validation. FMP/session ECN plumbing: - Thread ce_flag parsed at link layer through dispatch_link_message, handle_session_datagram, handle_session_payload, and handle_encrypted_session_msg to session delivery - Replace hardcoded false in session-layer record_recv() with actual ce_flag, activating ecn_ce_count tracking in session MMP ECN congestion detection and CE relay: - Add EcnConfig (node.ecn.*) with configurable loss_threshold (5%) and etx_threshold (3.0) for transit congestion detection - Add send_encrypted_link_message_with_ce() that ORs FLAG_CE into FMP header flags; original method delegates with ce_flag=false - Compute outgoing_ce = incoming_ce || local congestion on next-hop link, enabling hop-by-hop CE relay through transit nodes IPv6 ECN-CE marking: - Mark ECN-CE (0b11) in IPv6 Traffic Class on received DataPackets before TUN delivery when FMP CE flag is set - Only marks ECN-capable packets (ECT(0)/ECT(1)); Not-ECT packets unchanged per RFC 3168 Transport congestion abstraction and UDP kernel drop detection: - Add TransportCongestion struct to transport layer for transport- agnostic local congestion indicators - Replace tokio::UdpSocket with AsyncFd<socket2::Socket> using libc::recvmsg() with ancillary data parsing - Enable SO_RXQ_OVFL for kernel receive buffer drop counter on every packet, wiring up previously-stubbed UdpStats.kernel_drops - Add TransportDropState for per-transport delta tracking with 1s tick sampling via sample_transport_congestion() - Extend detect_congestion() with transport kernel drop check alongside MMP loss metrics Congestion monitoring and control: - Add CongestionStats (ce_forwarded, ce_received, congestion_detected, kernel_drop_events) to NodeStats with snapshot serialization - Wire counters into forwarding path, session handler, and transport drop sampling with rate-limited warn logging (5s interval) - Expose congestion data in show_routing control query and ecn_ce_count in show_mmp peer entries - Add congestion counters to fipstop routing tab in two-column layout Chaos harness integration: - Add query_routing(), query_transports(), snapshot_all_congestion() to chaos control module - Add congestion/kernel-drop log analysis in logs module - Add congestion-stress scenario: 10-node tree, 1 Mbps bandwidth, 5-10% netem loss, heavy iperf3 traffic - Add IngressConfig for tc ingress policing with per-peer policer filters simulating upstream bandwidth bottlenecks - Add iperf3 JSON result capture to traffic manager for throughput measurement across scenarios - Add ECN A/B test scenarios (ecn-ab-on/off.yaml) with ingress policing and comparison script - Enable TCP ECN negotiation (tcp_ecn=1 sysctl) in container entrypoint for end-to-end CE propagation Tests: - 10 ECN unit/integration tests: mark_ipv6_ecn_ce variants, CE relay chain (3-node propagation), EcnConfig serde roundtrip - 3 transport drop congestion detection unit tests Documentation: - Update fips-mesh-layer.md: replace outdated CE Echo stub with full ECN Congestion Signaling section covering detection logic, CE relay, IPv6 marking, session tracking, and monitoring counters - Update fips-configuration.md: add node.ecn.* parameter table and ecn block in complete reference YAML - Update fips-transport-layer.md: add Congestion Reporting section with TransportCongestion struct, congestion() trait method, and per-transport status; document AsyncFd/recvmsg/SO_RXQ_OVFL in UDP - Update chaos README: add congestion/ECN scenario docs, ingress traffic control, and iperf3 JSON capture sections - Update README.md: add ECN to features list and "What works today"; update transport and tooling entries |
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|
Johnathan Corgan
|
77ac8c822e |
Add fipstop TUI monitoring tool with smoothed metrics and quality indices
fipstop: ratatui-based TUI for real-time monitoring of a running FIPS daemon. Tabs and navigation: - 8 navigable tabs: Node, Peers, Transports, Sessions, Tree, Filters, Performance, Routing - Tab/BackTab navigation with group separators in tab bar - Table views with selectable rows, detail drill-down panels, and scrollbars Node tab: - Runtime info: pid, exe path, uptime, control socket path, TUN adapter name - Identity: npub, node_addr, ipv6 address - State summary with peer/session/link/transport/connection counts - TUN IPv6 traffic and forwarded transit traffic counters Peers tab: - Table with Name, Address, Conn, Depth, SRTT, Loss, LQI, Pkts Tx/Rx - Detail panel: identity, connection info, transport cross-reference, tree/bloom state, link stats, MMP metrics with LQI Sessions tab: - Table with Name, Remote Addr, State, Role, SRTT, Loss, SQI, Path MTU, Last Activity - Detail panel: identity, session info, traffic stats, MMP metrics with SQI Transports tab: - Hierarchical tree view: expandable transport parents with nested links (▼/▶ indicators, ├─/└─ tree chars, Space/Arrow to expand/collapse) - Transport detail: type-specific stats (UDP/TCP/Ethernet) - Link detail: peer cross-reference with MMP metrics and LQI Performance tab: - Link-layer MMP: SRTT, loss, ETX, LQI, goodput per peer - Session-layer MMP: SRTT, loss, ETX, SQI, path MTU per session - Trend indicators (rising/falling/stable) with context-aware coloring Routing tab: - Routing state: cache sizes, pending lookups, recent requests - Coordinate cache: entries, fill ratio, TTL, expiry, avg age - Statistics: forwarding, discovery request/response, error signal counters Tree tab: - Spanning tree position with 16 announce stats (inbound/outbound/cumulative) Filters tab: - Bloom filter announce stats, per-peer fill ratio and estimated node count MMP metrics enhancements: - Add etx_trend DualEwma for smoothed ETX tracking - Add smoothed_loss() and smoothed_etx() accessors (long-term EWMA) - LQI (Link Quality Index) = smoothed_etx * (1 + srtt_ms / 100) - SQI (Session Quality Index) = same formula for session layer - All loss/ETX displays prefer smoothed values with raw fallback Control socket: - Add smoothed_loss, smoothed_etx, lqi/sqi to show_peers, show_sessions, and show_mmp JSON responses - Rename fips_address to ipv6_addr in show_status and show_peers - Add tun_name and control_socket to show_status - FHS-compliant 3-tier default path: $XDG_RUNTIME_DIR, /run/fips, /tmp Node extensions: - Add started_at/uptime() to Node - Add tun_name() accessor Docker sidecar updates: - TCP transport support via FIPS_PEER_TRANSPORT env var - Build scripts include fipstop binary |
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Johnathan Corgan
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71a5c68fa9 |
Implement comprehensive node and transport statistics
Add 71 new counters (84 values) across three categories: Node statistics (NodeStats, plain u64 — single handler context): - Forwarding: 9 counters x (packets + bytes) = 18 values. Covers received, decode_error, ttl_exhausted, delivered, forwarded, drop_no_route, drop_mtu_exceeded, drop_send_error, originated. - Discovery: 17 counters (packets only). Request path: received, decode_error, duplicate, already_visited, target_is_us, forwarded, ttl_exhausted, initiated, deduplicated. Response path: received, decode_error, forwarded, identity_miss, proof_failed, accepted, timed_out. - Error signals: 3 counters — coords_required, path_broken, mtu_exceeded. - Spanning tree: 16 counters. Inbound announce handling (received through accepted, parent switch, loop detection, ancestry change), outbound (sent, rate limited, send failed), cumulative events (parent switches/losses, flap dampening). - Bloom filter: 10 counters. Inbound (received through accepted), outbound (sent, debounce suppressed, send failed). Transport statistics (AtomicU64 + Arc — shared with spawned tasks): - UDP (6 counters, 8 values): packets/bytes sent/recv, send_errors, recv_errors, mtu_exceeded, kernel_drops (stub for SO_MEMINFO). - TCP (10 counters, 12 values): packets/bytes sent/recv, send_errors, recv_errors, mtu_exceeded, plus connection lifecycle counters (established, accepted, rejected, timeouts, refused). Control socket integration: - show_routing: forwarding, discovery, error signal stats - show_tree: spanning tree stats + per-peer bloom metrics (estimated_count, set_bits, fill_ratio) and coordinate paths - show_bloom: bloom filter stats + per-peer snapshots - show_transports: per-transport stats snapshots Also refactor UDP transport from flat files (udp.rs + udp_stats.rs) into directory module (udp/mod.rs + udp/stats.rs) matching TCP structure, and fix pre-existing clippy warnings in tree/tests.rs. |
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Johnathan Corgan
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9668807ca4 |
Add Docker sidecar deployment for FIPS
Tailscale-style sidecar pattern: a FIPS container provides mesh networking, and a companion app container shares its network namespace via network_mode: service:fips. Security model: - iptables enforces strict isolation — the app container can only communicate over the FIPS mesh (fd::/8 via fips0) - No IPv4 access: eth0 restricted to FIPS UDP transport (port 2121) - No IPv6 on eth0: ip6tables blocks all eth0 IPv6 traffic - Only fips0 and loopback are reachable from the app container The sidecar accepts peer configuration via environment variables (FIPS_NSEC, FIPS_PEER_NPUB, FIPS_PEER_ADDR), so it can be pointed at any FIPS node without config file generation. Files: - testing/sidecar/: Dockerfile, Dockerfile.app, docker-compose.yml, entrypoint.sh, .env, resolv.conf, scripts/build.sh - testing/sidecar/README.md: security model, quick-start, architecture, DNS resolution, troubleshooting, production considerations - testing/sidecar/scripts/test-sidecar.sh: 3-node chain integration test verifying link establishment, multi-hop connectivity, and network isolation on each app container - .github/workflows/ci.yml: sidecar integration test matrix entry |
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Johnathan Corgan
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cd9289e0f3 |
Update test harness docs and add transport_mix support
Chaos harness enhancements: - transport_mix config: weighted random transport assignment for random topologies (erdos_renyi, random_geometric) with UDP/Ethernet/TCP - Replace LoRa with Bluetooth L2CAP in cost-based/mixed-tech scenarios using realistic netem values (15-40ms delay, 5-15ms jitter, 2-8% loss) - New churn-20-mixed scenario: 20-node Erdos-Renyi with 60% UDP, 20% Ethernet, 20% TCP, full netem/link-flap/churn/bandwidth config - Expanded chaos README with full scenario catalog in four categories Static harness: - Updated README with topology table and scenario count |
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Johnathan Corgan
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ec64a0dce1 |
Add TCP transport implementation and test harness support
Implement TCP transport for FIPS enabling firewall traversal and serving as the foundation for future Tor transport. This is the first connection-oriented transport in the system. Key design decisions: - FMP header-based framing: reuses existing 4-byte FMP common prefix for packet boundary recovery with zero framing overhead - Session survives TCP reconnection: Noise/MMP/FSP state bound to npub, not TCP connection; MMP liveness is sole authority for peer death - Connect-on-send: fresh connection on first send, transparent reconnect - close_connection() trait method for cross-connection deduplication cleanup New transport files: - src/transport/tcp/mod.rs: TcpTransport, connection pool, accept loop - src/transport/tcp/stream.rs: FMP-aware stream reader (shared with Tor) Modified: transport trait (close_connection), TcpConfig, TransportHandle match arms, create_transports(), initiate_connection() for connection- oriented links, cross-connection tie-breaker cleanup, design docs. Tree announce loop and TCP stability fixes: - Preserve tree announce rate-limit state across reconnection: carry forward last_tree_announce_sent_ms when a peer reconnects so the rate-limit window isn't reset to zero - Drop oversize TCP packets at sender: pre-send MTU check returns MtuExceeded instead of writing to the stream, preventing receiver-side connection teardown and reset-reconnect cycles Chaos harness: - TCP transport support: tcp_edges/has_tcp/tcp_peers in SimTopology, transport-aware config_gen with per-edge transport type, TCP port 443, pure-TCP node support - Include all non-Ethernet edges in directed_outbound() - Fix netem/links log messages to say "IP-based" instead of "UDP" - Add tcp-chain, tcp-only, and tcp-mesh scenario files Static harness: - Transport-aware config generation (get_default_transport, transport_port) - TCP transport injection via Python post-processing - Add tcp-chain topology and docker-compose profile |
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Johnathan Corgan
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daf1e629df |
Change default UDP port to 2121 and EtherType to 0x2121
Update the default UDP bind port from 4000 to 2121 (decimal) and the default Ethernet EtherType from 0x88B5 to 0x2121 across all source code, documentation, configuration templates, test fixtures, and scripts. Remove references to "IEEE 802 experimental range" since 0x2121 is not in that range. |
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c1589c02af |
Cross-compilation and macOS compatibility fixes (#1)
- Ethernet ioctl: cfg-gate the ioctl request parameter type — c_int on musl, c_ulong on gnu — so the same code compiles on both x86_64-unknown-linux-gnu and x86_64-unknown-linux-musl targets - Chaos harness macOS support: replace direct host 'ip link' invocations with a privileged Docker container helper (--net=host --pid=host) that shares the Docker VM's namespaces, making veth pair setup work on both Linux and macOS (where host 'ip' is unavailable and container PIDs live inside the Docker Desktop VM) - Python 3.9 compat: add 'from __future__ import annotations' to docker_exec.py for X|Y union syntax support - Add deploy/ to .gitignore Co-authored-by: origami74 <origami74@gmail.com> |
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Johnathan Corgan
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d29da442ac |
Add Ethernet transport with beacon discovery
Implement raw Ethernet transport using AF_PACKET SOCK_DGRAM on Linux with EtherType 0x88B5 (IEEE experimental range) and 1-byte frame type prefix (0x00=data, 0x01=beacon). Transport implementation: - EthernetConfig with interface, ethertype, MTU, buffer sizes, and four independent discovery knobs (discovery, announce, auto_connect, accept_connections) - PacketSocket/AsyncPacketSocket wrappers with ioctl helpers for interface index, MAC address, and MTU queries - EthernetTransport with Transport trait impl, async start/stop/send, receive loop dispatching data frames and discovery beacons - Discovery beacons (34 bytes: type + version + x-only pubkey) with DiscoveryBuffer for peer accumulation and dedup - Atomic statistics counters (frames, bytes, errors, beacons) - Platform-gated with #[cfg(target_os = "linux")] Transport-layer discovery integration: - Promote auto_connect() and accept_connections() to Transport trait with default implementations and TransportHandle dispatch - Extract initiate_connection() so both static peer config and discovery auto-connect share the same handshake initiation path - Add poll_transport_discovery() to the tick handler to drain discovery buffers and auto-connect to discovered peers - Enforce accept_connections() in handle_msg1() — transports with accept_connections=false silently drop inbound handshakes Node integration: - create_transports() handles Ethernet named instances - resolve_ethernet_addr() parses "interface/mac" address format - transport_mtu() generalized for multi-transport operation Test harness: - VethPair RAII struct for veth pair lifecycle management - Three #[ignore] integration tests requiring root/CAP_NET_RAW: two-node handshake, data exchange, mixed transport coexistence - Chaos harness: transport-aware topology model, VethManager for veth pairs between Docker containers, Ethernet-aware config gen, netem split (HTB+u32 for UDP, root netem for veth), transport-aware link flaps and node churn with veth re-setup - Container entrypoint waits for configured Ethernet interfaces before starting FIPS (handles veth creation timing) - New scenarios: ethernet-only (4-node ring), ethernet-mesh (6-node mixed UDP+Ethernet with netem and link flaps) Documentation: - fips-transport-layer.md: Ethernet section, beacon discovery, WiFi compatibility, updated discovery state, trait surface additions, implementation status table - fips-configuration.md: Ethernet parameter table, named instances, peer address format, mixed UDP+Ethernet example, complete reference - fips-wire-formats.md: Ethernet frame type prefix note |
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Johnathan Corgan
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27da3c0bbf |
Add fipsctl to Docker test harness builds
Include fipsctl binary in both static and chaos test harness Dockerfiles, build scripts, and gitignores alongside the existing fips binary. |
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Johnathan Corgan
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0d93a19e07 |
Implement cost-based parent selection with periodic re-evaluation
Cost-based parent selection: - Replace depth-only parent selection with effective_depth = depth + link_cost - link_cost computed from locally measured MMP metrics: etx * (1.0 + srtt_ms / 100.0) - Prevents bottleneck subtrees in heterogeneous networks where a LoRa link at depth 1 would otherwise always beat fiber at depth 2 - Configurable hysteresis (default 0.2) prevents marginal parent switches - Configurable hold-down timer (default 30s) suppresses re-evaluation after parent switch - Mandatory switches (parent lost, root change) bypass both safeguards - Link costs passed as HashMap parameter to keep TreeState pure Periodic re-evaluation: - evaluate_parent() was only called on TreeAnnounce receipt or parent loss; after tree stabilization, link degradation went undetected - Added timer-based re-evaluation (reeval_interval_secs, default 60s) that calls evaluate_parent() from the tick handler with current MMP link costs - Respects existing hold-down and hysteresis safeguards - Short-circuits when disabled or <2 peers Design documentation: - Update 7 design docs to reflect cost-based parent selection - Replace depth-only algorithm descriptions with effective_depth model - Replace rejected cumulative path cost spec with local-only design rationale - Rewrite Example 2 (heterogeneous links) for local-only cost model - Update config docs: parent_switch_threshold replaced by parent_hysteresis, hold_down_secs, reeval_interval_secs Chaos simulation enhancements: - fips_overrides with deep merge for per-scenario FIPS config customization - Explicit topology algorithm for deterministic test graphs - Control socket querying via fipsctl for tree/MMP snapshot collection - Edge existence validation in netem manager - Per-link netem policy overrides - 9 new chaos scenarios covering cost avoidance, depth-vs-cost tradeoffs, stability, mixed topologies, periodic re-evaluation, and bottleneck parent 12 new unit tests, 667 total passing, clippy clean. |
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Johnathan Corgan
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cfb087a95d |
Update design docs for heartbeat, auto-reconnect, handshake retry, and sim improvements
fips-link-layer.md: - Rewrite Liveness Detection: explicit Heartbeat (0x51) with 10s interval and 30s dead timeout replaces vague gossip-as-heartbeat description - Add Auto-Reconnect section: MMP dead timeout triggers retry with unlimited backoff for auto_reconnect peers - Add Handshake Message Retry section: link + session layer resend with exponential backoff within timeout window - Add Heartbeat to Link Message Types table - Update Implementation Status with three new implemented features fips-configuration.md: - Add handshake_resend_interval_ms, handshake_resend_backoff, handshake_max_resends to rate_limit table - Add heartbeat_interval_secs, link_dead_timeout_secs to general table - Add peers[].auto_reconnect to peers table - Note auto-reconnect bypasses max_retries in retry section - Update complete reference YAML with all new parameters fips-wire-formats.md: - Rename 0x51 from reserved Keepalive to implemented Heartbeat - Update Disconnect reason 0x07 to Heartbeat liveness timeout testing/chaos/README.md: - Add runner.log to output files - Add Directed Outbound Configs subsection |
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Johnathan Corgan
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78a73e1749 |
Auto-reconnect after MMP peer removal, directed outbound configs, sim improvements
Auto-reconnect: - Add per-peer auto_reconnect config (default true) to PeerConfig - schedule_reconnect() feeds removed peers back into retry system with unlimited retries and exponential backoff after MMP dead timeout - RetryState gains reconnect flag to distinguish startup retries (max_retries-limited) from auto-reconnect (unlimited) Retry re-fire fix: - process_pending_retries() now pushes retry_after_ms past the handshake timeout window after successful initiate_peer_connection(), preventing retries from firing every tick with no backoff Chaos sim improvements: - Directed outbound configs: BFS spanning tree + lower-ID-first assignment eliminates dual-connect race conditions in simulation - Save runner log (runner.log) alongside per-node logs for event correlation - Increase churn-20 traffic aggressiveness and node churn (max_down_nodes 3→5, traffic interval min 0s, duration max 90s, concurrent flows 5→10) |
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Johnathan Corgan
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66c268a564 |
Add static and stochastic Docker test harnesses
Move examples/docker-network/ to testing/static/ and add testing/chaos/ as a new stochastic simulation harness. testing/static/ — Static 5-node test harness: - Fixed mesh, chain, and mesh-public topologies with docker compose - Manual test scripts (ping, iperf, netem) - Build script, config generation, key derivation testing/chaos/ — Stochastic network simulation: - Python orchestrator generating N-node FIPS meshes with dynamic network conditions, driven by reproducible YAML scenarios - Topology generation: random geometric, Erdos-Renyi, or chain graphs with BFS connectivity guarantee - Per-link netem: HTB classful qdiscs with u32 filters for per-peer impairment (delay, loss, jitter), stochastic mutation across configurable policy profiles - Per-link bandwidth pacing: HTB rate limiting with configurable tiers (1/10/100/1000 mbps) randomly assigned per edge - Link flaps: tc netem 100% loss with graph connectivity protection - Node churn: docker stop/start with netem re-application on restart, shared down_nodes tracking across all managers - Traffic generation: random iperf3 sessions between node pairs - Down-node guards: all docker exec callers check container liveness, auto-detect crashed containers via is_container_running() safety net - Log collection and post-run analysis (panics, errors, sessions, MMP metrics, tree reconvergence) - chaos.sh wrapper with --seed, --duration, --verbose, --list options - Four scenarios: smoke-10, chaos-10, churn-10, churn-20 |