1ab6f54d10
Zero shared mutable state, no I/O -- behavior-preserving, verified via the smoke-test harness (28/28 endpoints match baseline). - server/data/*: CITY_COORDS, RIR_DELEGATION_URLS, TIER1_ASNS, IX_CITY_MAP, RIR country-code sets, UA constant - server/aspa-verification/engine.js: the RFC ASPA verification engine (hopCheck, verifyUpstream, verifyDownstream, detectValleys, etc.) - server/resilience-score.js, server/route-leak.js: pure scoring/heuristic functions server.js: 6838 -> 6454 lines. Part of the module-split plan at ~/.claude/plans/linked-riding-newell.md.
76 lines
2.9 KiB
JavaScript
76 lines
2.9 KiB
JavaScript
// Weighted: Transit Diversity 30%, Peering Breadth 25%, IXP Presence 20%, Path Redundancy 25%
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// Hard cap at 5.0 when single transit provider detected.
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// Confidence: HIGH — all inputs cross-validated daily vs RIPE Stat + PeeringDB.
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function computeResilienceScore(upstreams, peers, ixConnections, prefixes) {
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const upstreamCount = upstreams.length;
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const peerCount = peers.length;
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const ixCount = [...new Set(ixConnections.map(c => c.ix_id).filter(Boolean))].length;
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const prefixCount = prefixes.length;
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// Transit Diversity (0-10)
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let transitRaw = 0;
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if (upstreamCount === 0) transitRaw = 0;
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else if (upstreamCount === 1) transitRaw = 2;
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else if (upstreamCount === 2) transitRaw = 5;
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else if (upstreamCount <= 4) transitRaw = 7;
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else transitRaw = 10;
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// Peering Breadth (0-10)
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let peeringRaw = 0;
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if (peerCount >= 100) peeringRaw = 10;
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else if (peerCount >= 50) peeringRaw = 8;
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else if (peerCount >= 20) peeringRaw = 6;
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else if (peerCount >= 5) peeringRaw = 4;
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else if (peerCount >= 1) peeringRaw = 2;
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// IXP Presence (0-10)
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let ixpRaw = 0;
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if (ixCount >= 10) ixpRaw = 10;
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else if (ixCount >= 6) ixpRaw = 8;
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else if (ixCount >= 3) ixpRaw = 6;
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else if (ixCount >= 1) ixpRaw = 4;
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// Path Redundancy (0-10) — proxy: prefix diversity + upstream + IXP combination
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let pathRaw = 0;
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if (upstreamCount >= 2 && ixCount >= 1) pathRaw = 10;
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else if (upstreamCount >= 2) pathRaw = 7;
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else if (ixCount >= 2) pathRaw = 6;
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else if (upstreamCount === 1) pathRaw = 3;
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else if (prefixCount > 0) pathRaw = 1;
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const weighted =
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transitRaw * 0.30 +
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peeringRaw * 0.25 +
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ixpRaw * 0.20 +
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pathRaw * 0.25;
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const singleTransitCap = upstreamCount === 1;
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let score = Math.round(weighted * 10) / 10;
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if (singleTransitCap) score = Math.min(score, 5.0);
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score = Math.max(1.0, Math.min(10.0, score));
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// Only return null if truly no data at all
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if (upstreamCount === 0 && peerCount === 0 && ixCount === 0 && prefixCount === 0) {
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return null;
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}
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return {
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score,
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breakdown: {
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transit_diversity: { raw: transitRaw, weighted: Math.round(transitRaw * 0.30 * 10) / 10, upstream_count: upstreamCount },
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peering_breadth: { raw: peeringRaw, weighted: Math.round(peeringRaw * 0.25 * 10) / 10, peer_count: peerCount },
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ixp_presence: { raw: ixpRaw, weighted: Math.round(ixpRaw * 0.20 * 10) / 10, unique_ixps: ixCount },
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path_redundancy: { raw: pathRaw, weighted: Math.round(pathRaw * 0.25 * 10) / 10, prefix_count: prefixCount },
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},
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single_transit_cap_applied: singleTransitCap,
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_provenance: {
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source: "RIPE Stat asn-neighbours + PeeringDB netixlan",
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validation: "cross-validated",
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confidence: "high",
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note: "All inputs independently validated daily against external sources",
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},
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};
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}
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module.exports = { computeResilienceScore };
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