mirror of
https://github.com/kidfromjupiter/nearby.git
synced 2026-09-15 07:06:11 -04:00
Janusz Sobczak
5871209f44
Add conversion from public BroadcastRequest to internal BLE 4.2 broadcast request. PiperOrigin-RevId: 473338534
96 lines
3.1 KiB
C++
96 lines
3.1 KiB
C++
// Copyright 2022 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "presence/implementation/base_broadcast_request.h"
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#include <string>
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#include <variant>
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#include "absl/status/status.h"
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#include "absl/strings/string_view.h"
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#include "internal/platform/logging.h"
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#include "presence/broadcast_request.h"
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#include "presence/implementation/action_factory.h"
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#include "presence/implementation/encryption.h"
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namespace nearby {
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namespace presence {
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constexpr size_t kSaltSize = 2;
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BasePresenceRequestBuilder& BasePresenceRequestBuilder::SetSalt(
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absl::string_view salt) {
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if (salt.size() != kSaltSize) {
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NEARBY_LOG(WARNING, "Unsupported salt length: %d", salt.size());
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} else {
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salt_ = std::string(salt);
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}
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return *this;
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}
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BasePresenceRequestBuilder& BasePresenceRequestBuilder::SetTxPower(
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int8_t tx_power) {
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tx_power_ = tx_power;
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return *this;
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}
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BasePresenceRequestBuilder& BasePresenceRequestBuilder::SetAction(
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const Action& action) {
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action_ = action;
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return *this;
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}
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BasePresenceRequestBuilder& BasePresenceRequestBuilder::SetPowerMode(
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PowerMode power_mode) {
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power_mode_ = power_mode;
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return *this;
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}
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BasePresenceRequestBuilder::operator BaseBroadcastRequest() const {
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BaseBroadcastRequest::BasePresence presence{.identity = identity_,
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.action = action_};
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BaseBroadcastRequest broadcast_request{
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.variant = presence,
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.salt = salt_.size() == kSaltSize
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? salt_
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: Encryption::GenerateRandomByteArray(kSaltSize),
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.tx_power = tx_power_,
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.power_mode = power_mode_};
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return broadcast_request;
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}
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absl::StatusOr<BaseBroadcastRequest> BaseBroadcastRequest::Create(
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const BroadcastRequest& request) {
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if (absl::holds_alternative<PresenceBroadcast>(request.variant)) {
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const auto& presence_request =
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absl::get<PresenceBroadcast>(request.variant);
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if (presence_request.sections.empty()) {
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return absl::InvalidArgumentError("Missing broadcast sections");
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}
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if (presence_request.sections.size() > 1) {
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NEARBY_LOG(WARNING,
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"Only first section is used in BLE 4.2 advertisement");
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}
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const PresenceBroadcast::BroadcastSection& section =
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presence_request.sections.front();
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return BaseBroadcastRequest(
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BasePresenceRequestBuilder(section.identity)
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.SetTxPower(request.tx_power)
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.SetAction(ActionFactory::CreateAction(section.extended_properties))
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.SetPowerMode(request.power_mode));
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}
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return absl::UnimplementedError("Request not supported");
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}
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} // namespace presence
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} // namespace nearby
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