Martti MalmiandJohnathan Corgan
d548add18d
Ignore duplicate or counter-regressed ReceiverReports before updating RTT, loss, goodput, or ETX, so a delayed or reordered report can no longer poison link metrics. Compute the RTT-from-echo sample with checked timestamp arithmetic and reject zero, negative, or out-of-range results instead of risking wrap or underflow on untrusted wire values. On the sender side, when receiver dwell time overflows the u16 wire field, suppress the timestamp echo (send 0) and saturate dwell to u16::MAX rather than truncating, so a bogus small RTT cannot be formed. Adds duplicate, out-of-order, wrapped-add, and future-dated (checked_sub) sample tests, asserts loss and goodput stay unchanged on a dropped duplicate, and covers the dwell-overflow echo suppression. Documents the behavior in the MMP design note and CHANGELOG. Co-authored-by: Johnathan Corgan <johnathan@corganlabs.com>
FIPS Documentation
FIPS (Free Internetworking Peering System) is a self-organizing encrypted mesh network built on Nostr identities, capable of operating over arbitrary transports — local networks, the public internet, Tor, Bluetooth, or point-to-point links — without central infrastructure.
With FIPS, your machine becomes a node in the mesh with a self-generated cryptographic identity. There are two ways to deploy it.
As an overlay on top of existing IP networks, FIPS lets your node reach any other FIPS node wherever it sits — behind a NAT, on a different ISP, on a phone over cellular, on a laptop with only Bluetooth in range, or behind a Tor onion. The mesh forwards IPv6 traffic transparently and end-to-end encrypted, with no central VPN concentrator or coordinating server.
From the ground up over raw Ethernet, WiFi, or Bluetooth, FIPS provides a complete permissionless network without any pre-existing IP infrastructure, ISP, or DNS. Any node that joins the link gets routable IPv6 addresses, peer discovery, and a path to every other node automatically.
Either way, existing networking software runs over it unchanged: SSH, HTTP servers, file transfer, anything IPv6-native works the same way it would on a local network.
New to FIPS? Start with the Getting Started guide.
Documentation Sections
Tutorials
If you are starting from scratch and want a guided path to a working mesh, go here.
How-To Guides
If you have a specific task in mind — enabling a feature, deploying a component, diagnosing a problem — go here.
Reference
If you need to look up wire formats, configuration keys, command flags, or counter inventories, go here.
Design
If you want to understand how the mesh self-organizes, why FIPS makes the choices it does, or how the pieces fit together, go here.