Files
fips/docs/design
Johnathan Corgan d801fd0052 BLE continuous advertising, probe cooldown replaces burst beacon
Replace burst beacon pattern (1s on / 30s off) with continuous
advertising. The burst pattern caused L2CAP connect timeouts because
the remote side was no longer connectable when the probe fired after
jitter delay. BLE advertising overhead is negligible (~0.15% duty
cycle on advertising channels).

Replace the seen HashSet + jitter delay queue with a simple cooldown
map. After probing an address (success or failure), suppress re-probe
for 30s (configurable via probe_cooldown_secs). Connected peers are
filtered by pool membership check. This eliminates the bug where
failed probes permanently blacklisted addresses for the session
lifetime.

Remove config fields: scan_interval_secs, beacon_interval_secs,
beacon_duration_secs. Add: probe_cooldown_secs.
2026-03-25 15:25:10 +00:00
..

FIPS Design Documents

Protocol design specifications for the Federated Interoperable Peering System — a self-organizing encrypted mesh network built on Nostr identities.

Reading Order

Start with the introduction, then follow the protocol stack from bottom to top. After the stack, the mesh operation document explains how all the pieces work together. Supporting references provide deeper dives into specific topics.

Protocol Stack

Document Description
fips-intro.md Protocol introduction: goals, architecture, layer model
fips-transport-layer.md Transport layer: datagram delivery over arbitrary media
fips-mesh-layer.md FIPS Mesh Protocol (FMP): peer authentication, link encryption, forwarding
fips-session-layer.md FIPS Session Protocol (FSP): end-to-end encryption, sessions
fips-ipv6-adapter.md IPv6 adaptation: TUN interface, DNS, MTU enforcement

Mesh Behavior

Document Description
fips-mesh-operation.md How the mesh operates: routing, discovery, error recovery
fips-wire-formats.md Wire format reference for all message types

Supporting References

Document Description
fips-spanning-tree.md Spanning tree algorithms: root discovery, parent selection, coordinates
fips-bloom-filters.md Bloom filter math: FPR analysis, size classes, split-horizon

Implementation

Document Description
fips-configuration.md YAML configuration reference

Supplemental

Document Description
spanning-tree-dynamics.md Spanning tree walkthroughs: convergence scenarios, worked examples

Document Relationships

Document relationships