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Johnathan Corgan 5abf9a9325 docs: four-section /docs/ restructure with new-user content, accuracy pass, and gateway feature-set rewrite 
Restructures /docs/ by reader purpose (tutorials, how-to,
reference, design), adds the new-user-progression and
operator-recipe content the prior layout lacked, runs an
accuracy pass against current source across the pre-existing
design docs, and rewrites the gateway feature-set documentation
end-to-end around its actual operational profile (a niche
feature designed for systems already serving DHCP/DNS to a
LAN, with two independent halves — outbound LAN→mesh, inbound
mesh→LAN — sharing one nftables table, one binary, and one
control socket). Top-level README and getting-started rewritten
around two equally-weighted deployment modes (overlay on
existing IP networks; ground-up over non-IP transports).

## Additions

- 11 new tutorials in docs/tutorials/: an 8-step new-user
  progression from single-daemon test-mesh peering through
  to a ground-up two-device mesh, an IPv6-adapter side-trip
  walkthrough, an Advanced Tutorials index, and a hand-held
  OpenWrt walk-through for fips-gateway deployment that
  exercises both halves of the feature.
- 12 new how-tos in docs/how-to/: firewall activation,
  Nostr discovery (resolve / advertise / open across five
  scenarios), Tor onion (directory + control_port modes),
  UDP buffer tuning, unprivileged-user setup, persistent
  identity, host aliases, Bluetooth LE peering, MTU
  diagnostics, manual Linux-host gateway deployment (covers
  both halves), gateway troubleshooting (organised by half),
  and a section index.
- 9 new reference docs in docs/reference/: configuration,
  wire formats, control-socket protocol, four CLI references
  (fips, fipsctl, fipstop, fips-gateway), security posture
  matrix, and Nostr events catalog. Configuration and
  wire-formats are renamed-and-extended from prior design/
  versions; the other seven are net-new.
- 6 new design docs: fips-concepts, fips-architecture, and
  fips-prior-work split out of the deleted fips-intro.md;
  consolidated fips-mmp and fips-mtu aggregations; and a
  new generic port-advertisement-and-nat-traversal doc
  (Nostr-signaled port advertisement plus UDP NAT-traversal
  protocol, FIPS as an example implementation, suitable for
  eventual NIP submission).
- Top-level docs/getting-started.md walking through the
  binary-installer-only Install story.
- packaging/common/hosts pre-populated with the eight public
  test-mesh nodes so shortnames resolve out of the box on
  every fresh install.

## Changes

- 23 wire-format diagrams relocated to reference/diagrams/
  alongside the wire-formats move.
- 4 design diagrams corrected against source code
  (fips-protocol-stack, fips-identity-derivation,
  fips-coordinate-discovery, fips-routing-decision).
- 10 pre-existing design docs reconciled with current
  source. Numeric corrections: stale link-MMP report bounds
  (now [1s, 5s] with 200 ms cold-start floor); UDP default
  MTU (now 1280, IPv6 minimum); node_addr formula
  (SHA-256(pubkey)[..16]); Noise patterns (IK at link, XK
  at session); peer-ACL semantics (strict allowlist requires
  ALL in peers.deny); daemon DNS upstream ([::1]:5354);
  on-the-wire bloom-filter size (1,071 bytes); obsolete
  Cargo-feature references (PR #79 dropped them) removed.
- Transport framing tightened across the docs: TCP is for
  UDP-filtered networks (not NAT traversal); Tor is a
  deployment mode (not failover); WebSocket dropped (not a
  shipped FIPS transport); WiFi promoted to Implemented via
  Ethernet in infrastructure mode; classic-Bluetooth row
  removed (BLE is the only Bluetooth-mode transport).
- docs/design/fips-gateway.md rewritten end-to-end to lead
  with the niche-feature framing and the two-halves
  structure. Title moved from "FIPS Outbound LAN Gateway"
  to "FIPS Gateway"; architecture section describes the
  common machinery (the fips-gateway service, the nftables
  table, the control socket) before splitting into separate
  "Outbound Half" and "Inbound Half" sections of equal
  weight; security considerations split per-half; no Future
  Work section (speculative directions live in the project
  tracker, not in protocol design docs). Inbound port
  forwarding is a first-class half rather than a buried
  "Implemented Extensions" subsection.
- Gateway terminology unified across all gateway docs as a
  separate Linux service running alongside the fips daemon
  (its own systemd unit / OpenWrt init script). Container-
  pattern terms (sidecar) are reserved for the
  Docker/Kubernetes sidecar deployment examples — the
  testing/sidecar/ tree, examples/k8s-sidecar/,
  examples/sidecar-nostr-relay/,
  examples/wireguard-sidecar-macos/, and the related
  CHANGELOG / top-level README entries — where the term
  carries its standard container meaning.
- Net-new design body content: rekey section in
  fips-mesh-layer (Noise IK msg1/msg2 over the established
  link, K-bit cutover, drain window, smaller-NodeAddr-wins
  tie-breaker on dual-init); Mesh Size Estimation and
  Antipoison FPR Cap sections in fips-bloom-filters;
  Mesh-Interface Query Filter subsection in
  fips-ipv6-adapter; failure-suppression knobs and clock-
  skew tolerance in fips-nostr-discovery; loop-rejection
  and mid-chain ancestor swap added to spanning-tree
  propagation / stability rules; Priority Chain in
  fips-mesh-operation renumbered to match the
  routing-decision diagram.
- Top-level README: dropped the stale nostr-discovery
  cargo-feature parenthetical. docs/README.md and the four
  section READMEs (tutorials, how-to, reference, design)
  refreshed for the new structure; index rows reflect both
  halves of the gateway feature and the new fips-gateway
  CLI reference.
- Cargo.toml [package.metadata.deb] assets path updated for
  the fips-security.md move; .gitignore /reference/ rule
  anchored to repo root so docs/reference/ is trackable.
- packaging/openwrt-ipk/files/etc/fips/fips.yaml
  configuration-doc URL updated to the new
  docs/reference/configuration.md location.

## Deletions

- docs/design/fips-intro.md (split into the three new intro
  design docs).
- docs/design/document-relationships.svg (orphan, no longer
  referenced).
- docs/proposals/ tree removed; the only proposal it
  contained (the Nostr UDP hole-punch protocol) was
  rewritten as the new generic
  design/port-advertisement-and-nat-traversal.md.
 2026-05-08 03:02:12 +00:00
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.
 2026-03-25 04:21:46 +00:00
Johnathan Corgan 7f33e5f867 Fix lookup-request.svg: remove stale visited bloom filter 
The visited_bits field (hash_cnt + 256 bytes) was removed from the
LookupRequest wire format in the discovery-rework (bloom-guided tree
routing replaced the visited filter). Update the diagram to match the
current 46 + 16n byte format.
 2026-03-25 03:07:46 +00:00
Johnathan Corgan 00e26765bd Design documentation illustration and review pass 
Wire format diagrams:
- Add 24 SVG diagrams covering every FMP and FSP wire format: common
  prefix, established frame headers, Noise IK handshake messages,
  handshake flow, TreeAnnounce, AncestryEntry, FilterAnnounce,
  LookupRequest/Response, SessionDatagram, Disconnect, SenderReport,
  ReceiverReport, FSP complete message, SessionSetup/Ack/Msg3,
  PathMtuNotification, CoordsRequired, PathBroken, and MtuExceeded
- Replace ASCII art in fips-wire-formats.md with SVG references
- Apply text edits to fips-mesh-layer.md, fips-mesh-operation.md,
  fips-transport-layer.md, and fips-ipv6-adapter.md

Spanning tree dynamics:
- Add 12 topology SVG diagrams: node join (overview + 3-panel steps),
  three-node convergence (4-panel), link addition with depth labels,
  link removal, partition formation, and 6 real-world example diagrams
  (office, mixed-link, two-site WAN topologies)
- Rewrite all code blocks to narrative prose with diagram references
- Add inline prior art attributions distinguishing Yggdrasil-derived
  concepts from FIPS-novel contributions
- Add 3 new references (De Couto ETX, IEEE 802.1D, RFC 2328 OSPF) and
  Prior Art summary
- Remove outdated sections: indirect partition note, integration test
  gaps, DHT-based lookup reference
- Change "must elect a new root" to "must rediscover its new root"

Spanning tree design review (fips-spanning-tree.md):
- Rename "Root Election" to "Root Discovery" across docs
- Add "What Is a Spanning Tree?" introductory section
- Add parent selection intro explaining self-organization role
- Fix tree distance example: 4 hops, not 2
- Clarify timestamp field as advisory only
- Remove unimplemented ROOT_TIMEOUT and TREE_ENTRY_TTL from timing
  parameters and implementation status tables

Bloom filter design review (fips-bloom-filters.md):
- Add "What Is a Bloom Filter?" intro section
- Rewrite Purpose section to frame filters as routing path identification
- Correct FPR analysis (old values were 3-50x overstated)
- Add Filter Occupancy Model based on network size and tree position
- Fix filter expiration to describe actual MMP-based cleanup
- Combine Scale Considerations with Size Classes after Wire Format
- Fix stale FPR values in src/bloom/mod.rs comments

Session layer review (fips-session-layer.md):
- Add inline prior art attributions: Noise Protocol Framework, WireGuard,
  DTLS (RFC 6347), IKEv2 (RFC 7296), RFC 1191 PMTUD, Yggdrasil, NIP-44
- Replace warmup state machine ASCII art with SVG diagram
- Convert CoordsWarmup wire format code block to prose
- Add External References section with full citations

Level 5 implementation doc cleanup:
- Delete fips-software-architecture.md (redundant with protocol layer docs)
- Delete fips-state-machines.md (Rust tutorial, not protocol design)
- Add fipsctl command reference to README.md
- Update cross-references in fips-intro.md, docs/design/README.md,
  fips-transport-layer.md, fips-configuration.md

Fixes:
- Correct fd::/8 to fd00::/8 in fips-session-layer.md,
  fips-identity-derivation.svg, and fips-node-architecture.svg
- Fix config example MTU: 1197 → 1472 in fips-configuration.md

File organization:
- Move all SVG diagrams into docs/design/diagrams/ subdirectory
- Update all diagram references to use new paths
 2026-02-24 17:32:37 +00:00