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resolve: fix no mDNS announcement after probing
According to RFC 6762 section 8, an mDNS responder is supposed to announce its records after probing. Currently, there is a check in dns_scope_announce which returns if there are any pending transactions. This prevents announcements from being sent out even if there are pending non-probe transactions. To fix this, return only if there are active probe transactions.
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@ -1420,7 +1420,7 @@ int dns_scope_announce(DnsScope *scope, bool goodbye) {
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/* Check if we're done with probing. */
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LIST_FOREACH(transactions_by_scope, t, scope->transactions)
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if (DNS_TRANSACTION_IS_LIVE(t->state))
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if (t->probing && DNS_TRANSACTION_IS_LIVE(t->state))
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return 0;
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/* Check if there're services pending conflict resolution. */
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