1 // Copyright 2023 The Pigweed Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not 4 // use this file except in compliance with the License. You may obtain a copy of 5 // the License at 6 // 7 // https://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 12 // License for the specific language governing permissions and limitations under 13 // the License. 14 15 #pragma once 16 #include <lib/fit/result.h> 17 18 #include <functional> 19 #include <unordered_map> 20 21 #include "pw_bluetooth_sapphire/internal/host/common/error.h" 22 #include "pw_bluetooth_sapphire/internal/host/l2cap/scoped_channel.h" 23 #include "pw_bluetooth_sapphire/internal/host/sdp/pdu.h" 24 #include "pw_bluetooth_sapphire/internal/host/sdp/sdp.h" 25 26 namespace bt::sdp { 27 28 // The SDP client connects to the SDP server on a remote device and can perform 29 // search requests and returns results. It is expected to be short-lived. 30 // More than one client can be connected to the same host. 31 class Client { 32 public: 33 // Create a new SDP client on the given |channel|. |channel| must be 34 // un-activated. |channel| must not be null. 35 static std::unique_ptr<Client> Create(l2cap::Channel::WeakPtr channel, 36 pw::async::Dispatcher& dispatcher); 37 38 virtual ~Client() = default; 39 40 // Perform a ServiceSearchAttribute transaction, searching for the UUIDs in 41 // |search_pattern|, and requesting the attributes in |req_attributes|. 42 // If |req_attributes| is empty, all attributes will be requested. 43 // Results are returned asynchronously: 44 // - |result_cb| is called for each service which matches the pattern with 45 // the attributes requested. As long as true is returned, it can still 46 // be called. 47 // - when no more services remain, the result_cb status will be 48 // HostError::kNotFound. The return value is ignored. 49 using SearchResultFunction = fit::function<bool( 50 fit::result< 51 Error<>, 52 std::reference_wrapper<const std::map<AttributeId, DataElement>>>)>; 53 virtual void ServiceSearchAttributes( 54 std::unordered_set<UUID> search_pattern, 55 const std::unordered_set<AttributeId>& req_attributes, 56 SearchResultFunction result_cb) = 0; 57 }; 58 59 } // namespace bt::sdp 60