Files
routewatch/internal/cachedb/schema.sql
T
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Resolve PTR names over DNS-over-HTTPS and cache them for the record TTL (closes #238)
`internal/ptr` asks Google, Cloudflare, AdGuard and Quad9 in turn, 2 seconds in all per address. It keeps answers in memory and writes them through to `cache.db`, opened by the new `internal/cachedb`. A reserved address is not sent to the resolvers.

Judgement calls:
- Each resolver gets an equal share of the time left, so a hung resolver does not use up the 2 seconds.
- The negative TTL is the smaller of the SOA minimum and the SOA's own TTL (RFC 2308).
- Names that are not host names are dropped, as `net.Resolver.LookupAddr` does.

Model: opus-5-5
2026-11-10 10:46:05 +00:00

9 lines
307 B
SQL

-- hostnames holds the PTR names of addresses. names has the names separated by
-- spaces, and is empty for an address with no PTR names. expires_at is in
-- seconds since 1970.
CREATE TABLE IF NOT EXISTS hostnames (
address TEXT PRIMARY KEY,
names TEXT NOT NULL,
expires_at INTEGER NOT NULL
);