| /* |
| * Copyright (c) 2021, The OpenThread Authors. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the copyright holder nor the |
| * names of its contributors may be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** |
| * @file |
| * This file includes definitions for TREL DNS-SD over mDNS. |
| */ |
| |
| #ifndef OTBR_AGENT_TREL_DNSSD_HPP_ |
| #define OTBR_AGENT_TREL_DNSSD_HPP_ |
| |
| #if OTBR_ENABLE_TREL |
| |
| #include <assert.h> |
| #include <utility> |
| |
| #include <openthread/instance.h> |
| |
| #include "common/types.hpp" |
| #include "mdns/mdns.hpp" |
| #include "ncp/ncp_openthread.hpp" |
| |
| namespace otbr { |
| |
| namespace TrelDnssd { |
| |
| /** |
| * @addtogroup border-router-trel-dnssd |
| * |
| * @brief |
| * This module includes definition for TREL DNS-SD over mDNS. |
| * |
| * @{ |
| */ |
| |
| class TrelDnssd |
| { |
| public: |
| /** |
| * This constructor initializes the TrelDnssd instance. |
| * |
| * @param[in] aNcp A reference to the OpenThread Controller instance. |
| * @param[in] aPublisher A reference to the mDNS Publisher. |
| * |
| */ |
| explicit TrelDnssd(Ncp::ControllerOpenThread &aNcp, Mdns::Publisher &aPublisher); |
| |
| /** |
| * This method initializes the TrelDnssd instance. |
| * |
| * @param[in] aTrelNetif The network interface for discovering TREL peers. |
| * |
| */ |
| void Initialize(std::string aTrelNetif); |
| |
| /** |
| * This method starts browsing for TREL peers. |
| * |
| */ |
| void StartBrowse(void); |
| |
| /** |
| * This method stops browsing for TREL peers. |
| * |
| */ |
| void StopBrowse(void); |
| |
| /** |
| * This method registers the TREL service to DNS-SD. |
| * |
| * @param[in] aPort The UDP port of TREL service. |
| * @param[in] aTxtData The TXT data of TREL service. |
| * @param[in] aTxtLength The TXT length of TREL service. |
| * |
| */ |
| void RegisterService(uint16_t aPort, const uint8_t *aTxtData, uint8_t aTxtLength); |
| |
| /** |
| * This method removes the TREL service from DNS-SD. |
| * |
| */ |
| void UnregisterService(void); |
| |
| /** |
| * This method notifies that mDNS Publisher is ready. |
| * |
| */ |
| void OnMdnsPublisherReady(void); |
| |
| private: |
| static constexpr size_t kPeerCacheSize = 256; |
| static constexpr uint16_t kCheckNetifReadyIntervalMs = 5000; |
| |
| struct RegisterInfo |
| { |
| uint16_t mPort = 0; |
| std::vector<Mdns::Publisher::TxtEntry> mTxtEntries; |
| std::string mInstanceName; |
| |
| bool IsValid(void) const { return mPort > 0; } |
| bool IsPublished(void) const { return !mInstanceName.empty(); } |
| void Assign(uint16_t aPort, const uint8_t *aTxtData, uint8_t aTxtLength); |
| void Clear(void); |
| }; |
| |
| using Clock = std::chrono::system_clock; |
| |
| struct Peer |
| { |
| static const char kTxtRecordExtAddressKey[]; |
| |
| explicit Peer(std::vector<uint8_t> aTxtData, const otSockAddr &aSockAddr) |
| : mDiscoverTime(Clock::now()) |
| , mTxtData(std::move(aTxtData)) |
| , mSockAddr(aSockAddr) |
| { |
| ReadExtAddrFromTxtData(); |
| } |
| |
| void ReadExtAddrFromTxtData(void); |
| |
| Clock::time_point mDiscoverTime; |
| std::vector<uint8_t> mTxtData; |
| otSockAddr mSockAddr; |
| otExtAddress mExtAddr; |
| bool mValid = false; |
| }; |
| |
| using PeerMap = std::map<std::string, Peer>; |
| |
| bool IsInitialized(void) const { return !mTrelNetif.empty(); } |
| bool IsReady(void) const; |
| void OnBecomeReady(void); |
| void CheckTrelNetifReady(void); |
| std::string GetTrelInstanceName(void); |
| void PublishTrelService(void); |
| void UnpublishTrelService(void); |
| void OnTrelServiceInstanceResolved(const std::string & aType, |
| const Mdns::Publisher::DiscoveredInstanceInfo &aInstanceInfo); |
| void OnTrelServiceInstanceAdded(const Mdns::Publisher::DiscoveredInstanceInfo &aInstanceInfo); |
| void OnTrelServiceInstanceRemoved(const std::string &aInstanceName); |
| |
| void NotifyRemovePeer(const Peer &aPeer); |
| void CheckPeersNumLimit(void); |
| void RemoveAllPeers(void); |
| uint16_t CountDuplicatePeers(const Peer &aPeer); |
| |
| Mdns::Publisher & mPublisher; |
| Ncp::ControllerOpenThread &mNcp; |
| TaskRunner mTaskRunner; |
| std::string mTrelNetif; |
| uint32_t mTrelNetifIndex = 0; |
| uint64_t mSubscriberId = 0; |
| RegisterInfo mRegisterInfo; |
| PeerMap mPeers; |
| bool mMdnsPublisherReady = false; |
| }; |
| |
| /** |
| * @} |
| */ |
| |
| } // namespace TrelDnssd |
| |
| } // namespace otbr |
| |
| #endif // OTBR_ENABLE_TREL |
| |
| #endif // OTBR_AGENT_TREL_DNSSD_HPP_ |