1 /*
2 * Copyright (C) 2023 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 #include "chre_host/pigweed/hal_channel_output.h"
18
19 #include <cstdint>
20
21 #include "chre/event.h"
22 #include "chre/util/pigweed/rpc_common.h"
23 #include "chre_host/host_protocol_host.h"
24 #include "chre_host/log.h"
25 #include "chre_host/socket_client.h"
26 #include "pw_rpc/channel.h"
27 #include "pw_span/span.h"
28
29 namespace android::chre {
30
31 using ::flatbuffers::FlatBufferBuilder;
32
MaximumTransmissionUnit()33 size_t HalChannelOutput::MaximumTransmissionUnit() {
34 return mMaxMessageLen > kFlatBufferPadding
35 ? mMaxMessageLen - kFlatBufferPadding
36 : 0;
37 }
38
Send(pw::span<const std::byte> buffer)39 pw::Status HalChannelOutput::Send(pw::span<const std::byte> buffer) {
40 if (buffer.size() > 0) {
41 FlatBufferBuilder builder(buffer.size() + kFlatBufferPadding);
42
43 HostProtocolHost::encodeNanoappMessage(
44 builder, mServerNanoappId, CHRE_MESSAGE_TYPE_RPC, mHostEndpointId,
45 buffer.data(), buffer.size());
46
47 if (!mSocketClient.sendMessage(builder.GetBufferPointer(),
48 builder.GetSize())) {
49 LOGE("Failed to send message");
50 return PW_STATUS_UNKNOWN;
51 }
52 }
53
54 return PW_STATUS_OK;
55 }
56
57 } // namespace android::chre