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resolved: don't bother caching negative RRs when the SOA TTL is 0 anyway
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@ -320,6 +320,8 @@ static int dns_cache_put_negative(DnsCache *c, DnsResourceKey *key, int rcode, u
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return 0;
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if (key->type == DNS_TYPE_ANY)
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return 0;
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if (soa_ttl <= 0)
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return 0;
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if (!IN_SET(rcode, DNS_RCODE_SUCCESS, DNS_RCODE_NXDOMAIN))
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return 0;
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