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- feat(bind): add more RR types to zoneRR pattern - style: move class ZONE from ./index to lib/zone - test: replace coverage reporter nyc with c8 - bind: when a RR doesn't parse, show it before the error
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,146 @@ | ||
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| export default class ZONE extends Map { | ||
| constructor (opts = {}) { | ||
| super() | ||
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| this.RR = [] | ||
| this.SOA = {} | ||
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| this.setOrigin(opts.origin) | ||
| this.setTTL(opts.ttl) | ||
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| if (opts.RR) { | ||
| for (const r of opts.RR) { | ||
| this.addRR(r) | ||
| } | ||
| } | ||
| } | ||
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| addRR (rr) { | ||
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| if (rr.$TTL) { | ||
| this.setTTL(rr.$TTL) | ||
| return | ||
| } | ||
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| if (rr.$ORIGIN) { | ||
| this.setOrigin(rr.$ORIGIN) | ||
| return | ||
| } | ||
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| const type = rr.get('type') | ||
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| // assure origin is set | ||
| if (type !== 'SOA') { | ||
| if (!this.SOA.owner) throw new Error('SOA must be set first!') | ||
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| const c = rr.get('class') | ||
| if (c !== this.SOA.class) | ||
| throw new Error('All RRs in a file should have the same class') | ||
| } | ||
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| this.isNotDuplicate(rr) | ||
| this.itMatchesSetTTL(rr) | ||
| this.hasNoConflictingLabels(rr) | ||
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| switch (type) { | ||
| case 'SOA' : return this.setSOA(rr) | ||
| case 'CNAME': return this.addCname(rr) | ||
| // any types with additional validation go here | ||
| default: | ||
| } | ||
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| this.RR.push(rr) | ||
| } | ||
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| addCname (rr) { | ||
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| const ownerMatches = this.getOwnerMatches(rr) | ||
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| const bothMatch = ownerMatches.filter(r => r.get('type') === 'CNAME').length | ||
| if (bothMatch) throw new Error('multiple CNAME records with the same owner are NOT allowed, RFC 1034') | ||
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| // RFC 2181: An alias name (label of a CNAME record) may, if DNSSEC is | ||
| // in use, have SIG, NXT, and KEY RRs, but may have no other data. | ||
| // RFC 4035: If a CNAME RRset is present at a name in a signed zone, | ||
| // appropriate RRSIG and NSEC RRsets are REQUIRED at that name. | ||
| const compatibleTypes = 'SIG NXT KEY NSEC RRSIG'.split(' ') | ||
| const conflicts = ownerMatches.filter(r => { | ||
| return !compatibleTypes.includes(r.get('type')) | ||
| }).length | ||
| if (conflicts) throw new Error(`owner already exists, CNAME not allowed, RFC 1034, 2181, & 4035`) | ||
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| this.RR.push(rr) | ||
| } | ||
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| getRR (rr) { | ||
| const fields = rr.getFields() | ||
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| return this.RR.filter(r => { | ||
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| const fieldDiffs = fields.map(f => { | ||
| return r.get(f) === rr.get(f) | ||
| }).filter(m => m === false).length | ||
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| if (!fieldDiffs) return r | ||
| }) | ||
| } | ||
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| hasNoConflictingLabels (rr) { | ||
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| const ownerMatches = this.getOwnerMatches(rr) | ||
| if (ownerMatches.length === 0) return | ||
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| // CNAME conflicts with almost everything, assure no CNAME at this name | ||
| if (!'CNAME SIG NXT KEY NSEC RRSIG'.split(' ').includes(rr.get('type'))) { | ||
| const conflicts = ownerMatches.filter(r => { | ||
| return r.get('type') === 'CNAME' | ||
| }).length | ||
| if (conflicts) throw new Error(`owner exists as CNAME, not allowed, RFC 1034, 2181, & 4035`) | ||
| } | ||
| } | ||
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| isNotDuplicate (rr) { | ||
| if (this.getRR(rr).length) | ||
| throw new Error('multiple identical RRs are not allowed, RFC 2181') | ||
| } | ||
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| itMatchesSetTTL (rr) { | ||
| // a Resource Record Set exists...with the same label, class, type (different data) | ||
| const matches = this.RR.filter(r => { | ||
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| const diffs = [ 'owner', 'class', 'type' ].map(f => { | ||
| return r.get(f) === rr.get(f) | ||
| }).filter(m => m === false).length | ||
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| if (!diffs) return r | ||
| }) | ||
| if (!matches.length) return true | ||
| if (matches[0].get('ttl') === rr.get('ttl')) return true | ||
| throw new Error('Records with identical label, class, and type must have identical TTL, RFC 2181') | ||
| } | ||
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| getOwnerMatches (rr) { | ||
| const owner = rr.get('owner') | ||
| return this.RR.filter(r => { | ||
| return r.get('owner') === owner | ||
| }) | ||
| } | ||
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| setOrigin (val) { | ||
| if (!val) throw new Error('origin is required!') | ||
| this.set('origin', val) | ||
| } | ||
|
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| setSOA (rr) { | ||
| if (this.SOA.owner) | ||
| throw new Error('Exactly one SOA RR should be present at the top!, RFC 1035') | ||
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| rr.getFields().map(f => this.SOA[f] = rr.get(f)) | ||
| } | ||
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| setTTL (val) { | ||
| if (!val) return | ||
| this.set('ttl', val) | ||
| } | ||
| } |
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