1 /* 2 * Copyright 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef BUFFET_AVAHI_MDNS_CLIENT_H_ 18 #define BUFFET_AVAHI_MDNS_CLIENT_H_ 19 20 #include <map> 21 #include <string> 22 23 #include <avahi-client/client.h> 24 #include <avahi-client/publish.h> 25 #include <avahi-common/thread-watch.h> 26 27 #include "buffet/mdns_client.h" 28 29 namespace buffet { 30 31 // Publishes privet service on mDns using Avahi. 32 class AvahiMdnsClient : public MdnsClient { 33 public: 34 explicit AvahiMdnsClient(); 35 ~AvahiMdnsClient() override; 36 37 // weave::provider::DnsServiceDiscovery implementation. 38 void PublishService(const std::string& service_type, uint16_t port, 39 const std::vector<std::string>& txt) override; 40 void StopPublishing(const std::string& service_type) override; 41 42 private: 43 static void OnAvahiClientStateUpdate(AvahiClient* s, 44 AvahiClientState state, 45 void* userdata); 46 void RepublishService(); 47 48 uint16_t prev_port_{0}; 49 std::string prev_service_type_; 50 std::string service_name_; 51 std::vector<std::string> txt_records_; 52 std::unique_ptr<AvahiThreadedPoll, decltype(&avahi_threaded_poll_free)> 53 thread_pool_{nullptr, &avahi_threaded_poll_free}; 54 std::unique_ptr< ::AvahiClient, decltype(&avahi_client_free)> client_{ 55 nullptr, &avahi_client_free}; 56 std::unique_ptr<AvahiEntryGroup, decltype(&avahi_entry_group_free)> group_{ 57 nullptr, &avahi_entry_group_free}; 58 59 DISALLOW_COPY_AND_ASSIGN(AvahiMdnsClient); 60 }; 61 62 } // namespace buffet 63 64 #endif // BUFFET_AVAHI_MDNS_CLIENT_H_ 65