Donavan Fritz
c09c62fbaa
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Core building block for M2 CNI ADD. Pure logic (no netlink), mutex- serialized, seedable from committed state via MarkInUse. Hooks into pkg/embed for ip-algo IID derivation. - resolveEffective() implements the design-doc cidr6/cidr4 annotation rules: equal→node, supernet→node, subnet→ann, disjoint→error. First-match-wins across multiple annotation CIDRs. - allocV6() random IID within the effective CIDR; on ip-algo, defers to embed.Embed. 16-retry on collision (regenerates IID or N nibble). - allocV4() linear scan skipping .0 (network), .1 (gateway), .<last> (broadcast). Smallest supported block: /30 with 1 usable address. - Deterministic fakeRand in tests covers: intersection matrix, random IID, embed path, collision→retry, v4 skip-gateway, v4 exhaustion, dual-stack, release-then-reallocate, family mismatch rejection. No agent Run-loop integration yet — NewIPAM(nc.Spec.CIDR6, nc.Spec.CIDR4) will be called from Server.Run once netlink + RPC are in place. Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>