mirror of
https://github.com/jmcorgan/fips.git
synced 2026-07-22 07:48:26 +00:00
6aff490251
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.