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 #include "pw_bluetooth_sapphire/internal/host/gatt/connection.h"
16
17 #include <numeric>
18
19 #include "pw_bluetooth_sapphire/internal/host/common/assert.h"
20 #include "pw_bluetooth_sapphire/internal/host/common/log.h"
21 #include "pw_bluetooth_sapphire/internal/host/gatt/client.h"
22 #include "pw_bluetooth_sapphire/internal/host/gatt/local_service_manager.h"
23 #include "pw_bluetooth_sapphire/internal/host/gatt/server.h"
24
25 namespace bt::gatt::internal {
26
Connection(std::unique_ptr<Client> client,std::unique_ptr<Server> server,RemoteServiceWatcher svc_watcher)27 Connection::Connection(std::unique_ptr<Client> client,
28 std::unique_ptr<Server> server,
29 RemoteServiceWatcher svc_watcher)
30 : server_(std::move(server)), weak_self_(this) {
31 PW_CHECK(svc_watcher);
32
33 remote_service_manager_ =
34 std::make_unique<RemoteServiceManager>(std::move(client));
35 remote_service_manager_->set_service_watcher(std::move(svc_watcher));
36 }
37
Initialize(std::vector<UUID> service_uuids,fit::callback<void (uint16_t)> mtu_cb)38 void Connection::Initialize(std::vector<UUID> service_uuids,
39 fit::callback<void(uint16_t)> mtu_cb) {
40 PW_CHECK(remote_service_manager_);
41
42 auto uuids_count = service_uuids.size();
43 // status_cb must not capture att_ in order to prevent reference cycle.
44 auto status_cb = [self = weak_self_.GetWeakPtr(),
45 uuids_count](att::Result<> status) {
46 if (!self.is_alive()) {
47 return;
48 }
49
50 if (bt_is_error(status, ERROR, "gatt", "client setup failed")) {
51 // Signal a link error.
52 self->ShutDown();
53 } else if (uuids_count > 0) {
54 bt_log(DEBUG,
55 "gatt",
56 "primary service discovery complete for (%zu) service uuids",
57 uuids_count);
58 } else {
59 bt_log(DEBUG, "gatt", "primary service discovery complete");
60 }
61 };
62
63 remote_service_manager_->Initialize(
64 std::move(status_cb), std::move(mtu_cb), std::move(service_uuids));
65 }
66
ShutDown()67 void Connection::ShutDown() {
68 // We shut down the connection from the server not for any technical reason,
69 // but just because it was simpler to expose the att::Bearer's ShutDown
70 // behavior from the server.
71 server_->ShutDown();
72 }
73 } // namespace bt::gatt::internal
74