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do not lookup cname after looking up the txt for mta-sts, and follow cnames for mocks

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because the txt would already follow cnames.
the additional cname lookup didn't hurt, it just didn't do anything.
i probably didn't realize that before looking deeper into dns.
This commit is contained in:
Mechiel Lukkien
2023-10-14 22:42:26 +02:00
parent 8ca198882e
commit 101c2703d2
8 changed files with 43 additions and 76 deletions
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2
mtastsdb/db.go
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@ -263,7 +263,7 @@ func Get(ctx context.Context, resolver dns.Resolver, domain dns.Domain) (policy
policy = &cachedPolicy.Policy
nctx, cancel := context.WithTimeout(ctx, 30*time.Second)
defer cancel()
record, _, _, err := mtasts.LookupRecord(nctx, resolver, domain)
record, _, err := mtasts.LookupRecord(nctx, resolver, domain)
if err != nil {
if !errors.Is(err, mtasts.ErrNoRecord) {
// Could be a temporary DNS or configuration error.