resolved: check OPT RR before accepting a reply for verification of server feature level
Let's make sure we first check if the OPT was lost in the reply, before we accept a reply as successful and use it for verifying the current feature level.
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@ -683,8 +683,6 @@ void dns_transaction_process_reply(DnsTransaction *t, DnsPacket *p) {
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return;
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} else if (DNS_PACKET_TC(p))
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dns_server_packet_truncated(t->server, t->current_feature_level);
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else
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dns_server_packet_received(t->server, p->ipproto, t->current_feature_level, ts - t->start_usec, p->size);
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break;
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@ -742,8 +740,12 @@ void dns_transaction_process_reply(DnsTransaction *t, DnsPacket *p) {
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}
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/* Report that the OPT RR was missing */
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if (t->server && !p->opt)
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dns_server_packet_bad_opt(t->server, t->current_feature_level);
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if (t->server) {
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if (!p->opt)
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dns_server_packet_bad_opt(t->server, t->current_feature_level);
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dns_server_packet_received(t->server, p->ipproto, t->current_feature_level, ts - t->start_usec, p->size);
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}
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if (IN_SET(t->scope->protocol, DNS_PROTOCOL_DNS, DNS_PROTOCOL_LLMNR)) {
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