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// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef DISCOVERY_MDNS_MDNS_PUBLISHER_H_
#define DISCOVERY_MDNS_MDNS_PUBLISHER_H_
#include "discovery/mdns/mdns_records.h"
#include "discovery/mdns/mdns_responder.h"
namespace openscreen {
class TaskRunner;
namespace discovery {
// TODO(rwkeane): Add API for claiming a DomainName as described in RFC 6762
// Section 8.1's probing phase.
class MdnsPublisher : public MdnsResponder::RecordHandler {
public:
// |querier|, |sender|, |task_runner|, and |random_delay| must all persist for
// the duration of this object's lifetime
MdnsPublisher(MdnsQuerier* querier,
MdnsSender* sender,
TaskRunner* task_runner,
MdnsRandom* random_delay);
~MdnsPublisher();
// Registers a new mDNS record for advertisement by this service. For A, AAAA,
// SRV, and TXT records, the domain name must have already been claimed by the
// ClaimExclusiveOwnership() method and for PTR records the name being pointed
// to must have been claimed in the same fashion.
Error RegisterRecord(const MdnsRecord& record);
// Updates the existing record with name matching the name of the new record.
Error UpdateRegisteredRecord(const MdnsRecord& old_record,
const MdnsRecord& new_record);
// Stops advertising the provided record. If no more records with the provided
// name are bing advertised after this call's completion, then ownership of
// the name is released.
Error UnregisterRecord(const MdnsRecord& record);
OSP_DISALLOW_COPY_AND_ASSIGN(MdnsPublisher);
private:
// MdnsResponder::RecordHandler overrides.
bool IsExclusiveOwner(const DomainName& name) override;
bool HasRecords(const DomainName& name,
DnsType type,
DnsClass clazz) override;
std::vector<MdnsRecord::ConstRef> GetRecords(const DomainName& name,
DnsType type,
DnsClass clazz) override;
MdnsQuerier* const querier_;
MdnsSender* const sender_;
TaskRunner* const task_runner_;
MdnsRandom* const random_delay_;
};
} // namespace discovery
} // namespace openscreen
#endif // DISCOVERY_MDNS_MDNS_PUBLISHER_H_
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