Discover, connect, age and reconnect

This figure documents the historical i386 source baseline. Current native x86-64/AArch64 qualification is recorded separately; this is not an ELF64 or native SMP implementation diagram.

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Discover, connect, age and reconnect UDP announcements on 5100 discover up to eight peers. TCP on 5101 performs the simplified Noise_XX-like handshake before encrypted traffic. At 100 Hz, connected peers become stale beyond 6000 ticks and disconnected beyond 12000; refresh can restore a stale peer, and a disconnected peer retries with backoff. Transport failures can disconnect immediately. Local peers use SPSC channels, not TCP/Noise. discovered->connecting connection attempt connecting->handshake exchange keys connected->stale last seen > 6000 ticks connected->disconnected transport failure stale->connected announcement refresh stale->disconnected last seen > 12000 ticks disconnected->connecting bounded-backoff reconnect announce->discovered announcement handshake->connected success discovered DISCOVERED connecting CONNECTING connected CONNECTED stale STALE disconnected DISCONNECTED announce UDP discovery · port 5100 up to 8 peers handshake TCP handshake · port 5101 simplified Noise_XX-like exchange note 100 Hz tick basis · announce ~5 s, heartbeat ~3 s Local inter-core peers use SPSC channels, not TCP / Noise.
Discover, connect, age and reconnect UDP announcements on 5100 discover up to eight peers. TCP on 5101 performs the simplified Noise_XX-like handshake before encrypted traffic. At 100 Hz, connected peers become stale beyond 6000 ticks and disconnected beyond 12000; refresh can restore a stale peer, and a disconnected peer retries with backoff. Transport failures can disconnect immediately. Local peers use SPSC channels, not TCP/Noise. 100 Hz; announce ~5 s; heartbeat ~3 s. Local peers: SPSC, not TCP / Noise. announce->discovered announcement discovered->connecting connect attempt connecting->handshake exchange keys handshake->connected success connected->stale age > 6000 ticks connected:e->disconnected:e transport failure stale:e->connected:e refresh stale->disconnected age > 12000 ticks disconnected:e->connecting:e backoff retry announce UDP discovery · 5100 up to 8 peers discovered DISCOVERED connecting CONNECTING handshake TCP handshake · 5101 simplified Noise_XX-like exchange connected CONNECTED stale STALE disconnected DISCONNECTED

TCP peers age from last-seen time; local inter-core peers bypass network stale checks.

Text equivalent and source references
  • UDP announcements on 5100 discover up to eight peers. TCP on 5101 performs the simplified Noise_XX-like handshake before encrypted traffic.
  • At 100 Hz, connected peers become stale beyond 6000 ticks and disconnected beyond 12000; refresh can restore a stale peer, and a disconnected peer retries with backoff. Transport failures can disconnect immediately. Local peers use SPSC channels, not TCP/Noise.

Peer state machine. Source paths refer to the atlas baseline; the kernel checkout is private.

  • include/mesh.h · limits, peer states, transports
  • kernel/graph/mesh.c · mesh_tick, mesh_connect_peer, handle_handshake

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