mirror of
https://github.com/kidfromjupiter/nearby.git
synced 2026-09-15 07:06:11 -04:00
Alexey Polyudov
204f76077d
Signed-off-by: Alexey Polyudov <apolyudov@google.com> Change-Id: I2cf5bf225b76f4c1541954651f3a7544a14e0cec
591 lines
19 KiB
C++
591 lines
19 KiB
C++
#include "core/internal/client_proxy.h"
|
|
|
|
#include <cstdlib>
|
|
#include <limits>
|
|
#include <sstream>
|
|
#include <utility>
|
|
|
|
#include "platform/api/hash_utils.h"
|
|
#include "platform/base64_utils.h"
|
|
#include "platform/prng.h"
|
|
#include "platform/synchronized.h"
|
|
#include "proto/connections_enums.pb.h"
|
|
|
|
namespace location {
|
|
namespace nearby {
|
|
namespace connections {
|
|
|
|
namespace client_proxy {
|
|
|
|
template <typename K, typename V>
|
|
void eraseOwnedPtrFromMap(std::map<K, Ptr<V>>& m, const K& k) {
|
|
typename std::map<K, Ptr<V>>::iterator it = m.find(k);
|
|
if (it != m.end()) {
|
|
it->second.destroy();
|
|
m.erase(it);
|
|
}
|
|
}
|
|
|
|
} // namespace client_proxy
|
|
|
|
template <typename Platform>
|
|
const std::int32_t ClientProxy<Platform>::kEndpointIdLength = 4;
|
|
|
|
template <typename Platform>
|
|
ClientProxy<Platform>::ClientProxy()
|
|
: lock_(Platform::createLock()), client_id_(Prng().nextInt64()) {}
|
|
|
|
template <typename Platform>
|
|
ClientProxy<Platform>::~ClientProxy() {
|
|
reset();
|
|
}
|
|
|
|
template <typename Platform>
|
|
std::int64_t ClientProxy<Platform>::getClientId() const {
|
|
return client_id_;
|
|
}
|
|
|
|
template <typename Platform>
|
|
std::string ClientProxy<Platform>::generateLocalEndpointId() {
|
|
// 1) Concatenate the DeviceID with this ClientID.
|
|
// 2) Compute a hash of that concatenation.
|
|
// 3) Base64-encode that hash, to make it human-readable.
|
|
// 4) Use only the first 4 bytes of that Base64 encoding.
|
|
|
|
std::ostringstream client_id_str;
|
|
client_id_str << getClientId();
|
|
|
|
ScopedPtr<Ptr<HashUtils>> hash_utils(Platform::createHashUtils());
|
|
ScopedPtr<ConstPtr<ByteArray>> id_hash(
|
|
hash_utils->sha256(Platform::getDeviceId() + client_id_str.str()));
|
|
|
|
return Base64Utils::encode(id_hash.get()).substr(0, kEndpointIdLength);
|
|
}
|
|
|
|
template <typename Platform>
|
|
void ClientProxy<Platform>::reset() {
|
|
Synchronized s(lock_.get());
|
|
|
|
stoppedAdvertising();
|
|
stoppedDiscovery();
|
|
removeAllEndpoints();
|
|
}
|
|
|
|
template <typename Platform>
|
|
void ClientProxy<Platform>::startedAdvertising(
|
|
const std::string& service_id, const Strategy& strategy,
|
|
Ptr<ConnectionLifecycleListener> connection_lifecycle_listener,
|
|
const std::vector<proto::connections::Medium>& mediums) {
|
|
Synchronized s(lock_.get());
|
|
|
|
advertising_info_.destroy();
|
|
advertising_info_ =
|
|
MakePtr(new AdvertisingInfo(service_id, connection_lifecycle_listener));
|
|
}
|
|
|
|
template <typename Platform>
|
|
void ClientProxy<Platform>::stoppedAdvertising() {
|
|
Synchronized s(lock_.get());
|
|
|
|
if (isAdvertising()) {
|
|
advertising_info_.destroy();
|
|
}
|
|
}
|
|
|
|
template <typename Platform>
|
|
bool ClientProxy<Platform>::isAdvertising() {
|
|
Synchronized s(lock_.get());
|
|
|
|
return !advertising_info_.isNull();
|
|
}
|
|
|
|
template <typename Platform>
|
|
std::string ClientProxy<Platform>::getAdvertisingServiceId() {
|
|
Synchronized s(lock_.get());
|
|
|
|
if (!isAdvertising()) {
|
|
return "";
|
|
}
|
|
|
|
return advertising_info_->service_id;
|
|
}
|
|
|
|
template <typename Platform>
|
|
void ClientProxy<Platform>::startedDiscovery(
|
|
const std::string& service_id, const Strategy& strategy,
|
|
Ptr<DiscoveryListener> discovery_listener,
|
|
const std::vector<proto::connections::Medium>& mediums) {
|
|
Synchronized s(lock_.get());
|
|
|
|
discovery_info_.destroy();
|
|
discovery_info_ = MakePtr(new DiscoveryInfo(service_id, discovery_listener));
|
|
}
|
|
|
|
template <typename Platform>
|
|
void ClientProxy<Platform>::stoppedDiscovery() {
|
|
Synchronized s(lock_.get());
|
|
|
|
if (isDiscovering()) {
|
|
discovered_endpoint_ids_.clear();
|
|
discovery_info_.destroy();
|
|
}
|
|
}
|
|
|
|
template <typename Platform>
|
|
bool ClientProxy<Platform>::isDiscoveringServiceId(
|
|
const std::string& service_id) {
|
|
Synchronized s(lock_.get());
|
|
|
|
return isDiscovering() && service_id == discovery_info_->service_id;
|
|
}
|
|
|
|
template <typename Platform>
|
|
bool ClientProxy<Platform>::isDiscovering() {
|
|
Synchronized s(lock_.get());
|
|
|
|
return !discovery_info_.isNull();
|
|
}
|
|
|
|
template <typename Platform>
|
|
std::string ClientProxy<Platform>::getDiscoveryServiceId() {
|
|
Synchronized s(lock_.get());
|
|
|
|
if (!isDiscovering()) {
|
|
return "";
|
|
}
|
|
|
|
return discovery_info_->service_id;
|
|
}
|
|
|
|
template <typename Platform>
|
|
void ClientProxy<Platform>::onEndpointFound(const std::string& endpoint_id,
|
|
const std::string& service_id,
|
|
const std::string& endpoint_name,
|
|
proto::connections::Medium medium) {
|
|
Synchronized s(lock_.get());
|
|
|
|
if (isDiscoveringServiceId(service_id)) {
|
|
if (discovered_endpoint_ids_.find(endpoint_id) !=
|
|
discovered_endpoint_ids_.end()) {
|
|
// TODO(tracyzhou): Add logging.
|
|
return;
|
|
}
|
|
discovered_endpoint_ids_.insert(endpoint_id);
|
|
discovery_info_->discovery_listener->onEndpointFound(MakeConstPtr(
|
|
new OnEndpointFoundParams(endpoint_id, service_id, endpoint_name)));
|
|
}
|
|
}
|
|
|
|
template <typename Platform>
|
|
void ClientProxy<Platform>::onEndpointLost(const std::string& service_id,
|
|
const std::string& endpoint_id) {
|
|
Synchronized s(lock_.get());
|
|
|
|
if (isDiscoveringServiceId(service_id)) {
|
|
std::set<std::string>::const_iterator it =
|
|
discovered_endpoint_ids_.find(endpoint_id);
|
|
if (it == discovered_endpoint_ids_.end()) {
|
|
return;
|
|
}
|
|
discovered_endpoint_ids_.erase(it);
|
|
discovery_info_->discovery_listener->onEndpointLost(
|
|
MakeConstPtr(new OnEndpointLostParams(endpoint_id)));
|
|
}
|
|
}
|
|
|
|
template <typename Platform>
|
|
void ClientProxy<Platform>::onConnectionInitiated(
|
|
const std::string& endpoint_id, const std::string& endpoint_name,
|
|
const std::string& authentication_token,
|
|
ConstPtr<ByteArray> raw_authentication_token, bool is_incoming_connection,
|
|
Ptr<ConnectionLifecycleListener> connection_lifecycle_listener) {
|
|
Synchronized s(lock_.get());
|
|
|
|
ScopedPtr<ConstPtr<ByteArray>> scoped_raw_authentication_token(
|
|
raw_authentication_token);
|
|
|
|
// Whether this is incoming or outgoing, the local and remote endpoints both
|
|
// still need to accept this connection, so set its establishment status to
|
|
// PENDING.
|
|
connection_establishment_statuses_.insert(
|
|
std::make_pair(endpoint_id, ConnectionMetadata(is_incoming_connection)));
|
|
|
|
// Remember the ConnectionLifecycleListener for this endpoint.
|
|
connection_lifecycle_listeners_.insert(
|
|
std::make_pair(endpoint_id, connection_lifecycle_listener));
|
|
|
|
// Notify the client.
|
|
//
|
|
// Note: we allow devices to connect to an advertiser even after it stops
|
|
// advertising, so no need to check isAdvertising() here.
|
|
connection_lifecycle_listeners_.find(endpoint_id)
|
|
->second->onConnectionInitiated(
|
|
MakeConstPtr(new OnConnectionInitiatedParams(
|
|
endpoint_id, endpoint_name, authentication_token,
|
|
scoped_raw_authentication_token.release(),
|
|
is_incoming_connection)));
|
|
}
|
|
|
|
template <typename Platform>
|
|
void ClientProxy<Platform>::onConnectionResult(const std::string& endpoint_id,
|
|
Status::Value status) {
|
|
Synchronized s(lock_.get());
|
|
|
|
if (!hasPendingConnectionToEndpoint(endpoint_id)) {
|
|
// TODO(tracyzhou): Add logging.
|
|
return;
|
|
}
|
|
|
|
// Notify the client.
|
|
connection_lifecycle_listeners_.find(endpoint_id)
|
|
->second->onConnectionResult(
|
|
MakeConstPtr(new OnConnectionResultParams(endpoint_id, status)));
|
|
if (Status::SUCCESS == status) {
|
|
// Mark ourselves as connected. Payloads should now be allowed.
|
|
typename ConnectionEstablishmentStatusesMap::iterator it =
|
|
connection_establishment_statuses_.find(endpoint_id);
|
|
if (it != connection_establishment_statuses_.end()) {
|
|
it->second.status = ConnectionEstablishmentStatus::CONNECTED;
|
|
}
|
|
} else {
|
|
// Otherwise, clean up.
|
|
onDisconnected(endpoint_id, false /* notify */);
|
|
}
|
|
}
|
|
|
|
template <typename Platform>
|
|
void ClientProxy<Platform>::onBandwidthChanged(const std::string& endpoint_id,
|
|
std::int32_t quality) {
|
|
Synchronized s(lock_.get());
|
|
|
|
ConnectionLifecycleListenersMap::iterator it =
|
|
connection_lifecycle_listeners_.find(endpoint_id);
|
|
if (it != connection_lifecycle_listeners_.end()) {
|
|
it->second->onBandwidthChanged(
|
|
MakeConstPtr(new OnBandwidthChangedParams(endpoint_id, quality)));
|
|
}
|
|
}
|
|
|
|
template <typename Platform>
|
|
void ClientProxy<Platform>::onDisconnected(const std::string& endpoint_id,
|
|
bool notify) {
|
|
Synchronized s(lock_.get());
|
|
|
|
connection_establishment_statuses_.erase(endpoint_id);
|
|
|
|
client_proxy::eraseOwnedPtrFromMap(payload_listeners_, endpoint_id);
|
|
|
|
ConnectionLifecycleListenersMap::iterator it =
|
|
connection_lifecycle_listeners_.find(endpoint_id);
|
|
if (it != connection_lifecycle_listeners_.end()) {
|
|
if (notify) {
|
|
it->second->onDisconnected(
|
|
MakeConstPtr(new OnDisconnectedParams(endpoint_id)));
|
|
}
|
|
it->second.destroy();
|
|
connection_lifecycle_listeners_.erase(it);
|
|
}
|
|
}
|
|
|
|
template <typename Platform>
|
|
bool ClientProxy<Platform>::isConnectedToEndpoint(
|
|
const std::string& endpoint_id) {
|
|
Synchronized s(lock_.get());
|
|
|
|
typename ConnectionEstablishmentStatusesMap::iterator it =
|
|
connection_establishment_statuses_.find(endpoint_id);
|
|
if (it == connection_establishment_statuses_.end()) {
|
|
return false;
|
|
}
|
|
const ConnectionMetadata& metadata = it->second;
|
|
return metadata.status == ConnectionEstablishmentStatus::CONNECTED;
|
|
}
|
|
|
|
template <typename Platform>
|
|
std::vector<std::string> ClientProxy<Platform>::getConnectedEndpoints() {
|
|
Synchronized s(lock_.get());
|
|
|
|
std::vector<std::string> connected_endpoints;
|
|
|
|
for (typename ConnectionEstablishmentStatusesMap::iterator it =
|
|
connection_establishment_statuses_.begin();
|
|
it != connection_establishment_statuses_.end(); it++) {
|
|
const std::string& endpoint_id = it->first;
|
|
const ConnectionMetadata& metadata = it->second;
|
|
if (ConnectionEstablishmentStatus::CONNECTED == metadata.status) {
|
|
connected_endpoints.push_back(endpoint_id);
|
|
}
|
|
}
|
|
return connected_endpoints;
|
|
}
|
|
|
|
template <typename Platform>
|
|
std::vector<std::string> ClientProxy<Platform>::getPendingConnectedEndpoints() {
|
|
Synchronized s(lock_.get());
|
|
|
|
std::vector<std::string> pending_connected_endpoints;
|
|
|
|
for (typename ConnectionEstablishmentStatusesMap::iterator it =
|
|
connection_establishment_statuses_.begin();
|
|
it != connection_establishment_statuses_.end(); it++) {
|
|
const std::string& endpoint_id = it->first;
|
|
const ConnectionMetadata& metadata = it->second;
|
|
if (ConnectionEstablishmentStatus::CONNECTED != metadata.status) {
|
|
pending_connected_endpoints.push_back(endpoint_id);
|
|
}
|
|
}
|
|
return pending_connected_endpoints;
|
|
}
|
|
|
|
template <typename Platform>
|
|
std::int32_t ClientProxy<Platform>::getNumOutgoingConnections() {
|
|
Synchronized s(lock_.get());
|
|
|
|
std::int32_t num_outgoing_connections = 0;
|
|
|
|
for (typename ConnectionEstablishmentStatusesMap::iterator it =
|
|
connection_establishment_statuses_.begin();
|
|
it != connection_establishment_statuses_.end(); it++) {
|
|
const ConnectionMetadata& metadata = it->second;
|
|
if (ConnectionEstablishmentStatus::CONNECTED == metadata.status &&
|
|
!metadata.is_incoming) {
|
|
num_outgoing_connections++;
|
|
}
|
|
}
|
|
return num_outgoing_connections;
|
|
}
|
|
|
|
template <typename Platform>
|
|
std::int32_t ClientProxy<Platform>::getNumIncomingConnections() {
|
|
Synchronized s(lock_.get());
|
|
|
|
std::int32_t num_incoming_connections = 0;
|
|
|
|
for (typename ConnectionEstablishmentStatusesMap::iterator it =
|
|
connection_establishment_statuses_.begin();
|
|
it != connection_establishment_statuses_.end(); it++) {
|
|
const ConnectionMetadata& metadata = it->second;
|
|
if (ConnectionEstablishmentStatus::CONNECTED == metadata.status &&
|
|
metadata.is_incoming) {
|
|
num_incoming_connections++;
|
|
}
|
|
}
|
|
return num_incoming_connections;
|
|
}
|
|
|
|
template <typename Platform>
|
|
bool ClientProxy<Platform>::hasPendingConnectionToEndpoint(
|
|
const std::string& endpoint_id) {
|
|
Synchronized s(lock_.get());
|
|
|
|
typename ConnectionEstablishmentStatusesMap::iterator it =
|
|
connection_establishment_statuses_.find(endpoint_id);
|
|
if (it == connection_establishment_statuses_.end()) {
|
|
return false;
|
|
}
|
|
const ConnectionMetadata& metadata = it->second;
|
|
return metadata.status != ConnectionEstablishmentStatus::CONNECTED;
|
|
}
|
|
|
|
template <typename Platform>
|
|
bool ClientProxy<Platform>::hasLocalEndpointResponded(
|
|
const std::string& endpoint_id) {
|
|
Synchronized s(lock_.get());
|
|
|
|
return connectionEstablishmentStatusesContains(
|
|
endpoint_id,
|
|
ConnectionEstablishmentStatus::LOCAL_ENDPOINT_ACCEPTED) ||
|
|
connectionEstablishmentStatusesContains(
|
|
endpoint_id,
|
|
ConnectionEstablishmentStatus::LOCAL_ENDPOINT_REJECTED);
|
|
}
|
|
|
|
template <typename Platform>
|
|
bool ClientProxy<Platform>::hasRemoteEndpointResponded(
|
|
const std::string& endpoint_id) {
|
|
Synchronized s(lock_.get());
|
|
|
|
return connectionEstablishmentStatusesContains(
|
|
endpoint_id,
|
|
ConnectionEstablishmentStatus::REMOTE_ENDPOINT_ACCEPTED) ||
|
|
connectionEstablishmentStatusesContains(
|
|
endpoint_id,
|
|
ConnectionEstablishmentStatus::REMOTE_ENDPOINT_REJECTED);
|
|
}
|
|
|
|
template <typename Platform>
|
|
void ClientProxy<Platform>::localEndpointAcceptedConnection(
|
|
const std::string& endpoint_id, Ptr<PayloadListener> payload_listener) {
|
|
Synchronized s(lock_.get());
|
|
|
|
if (hasLocalEndpointResponded(endpoint_id)) {
|
|
// TODO(tracyzhou): Add logging.
|
|
return;
|
|
}
|
|
|
|
appendConnectionEstablishmentStatus(
|
|
endpoint_id, ConnectionEstablishmentStatus::LOCAL_ENDPOINT_ACCEPTED);
|
|
payload_listeners_.insert(std::make_pair(endpoint_id, payload_listener));
|
|
}
|
|
|
|
template <typename Platform>
|
|
void ClientProxy<Platform>::localEndpointRejectedConnection(
|
|
const std::string& endpoint_id) {
|
|
Synchronized s(lock_.get());
|
|
|
|
if (hasLocalEndpointResponded(endpoint_id)) {
|
|
// TODO(tracyzhou): Add logging.
|
|
return;
|
|
}
|
|
|
|
appendConnectionEstablishmentStatus(
|
|
endpoint_id, ConnectionEstablishmentStatus::LOCAL_ENDPOINT_REJECTED);
|
|
}
|
|
|
|
template <typename Platform>
|
|
void ClientProxy<Platform>::remoteEndpointAcceptedConnection(
|
|
const std::string& endpoint_id) {
|
|
Synchronized s(lock_.get());
|
|
|
|
if (hasRemoteEndpointResponded(endpoint_id)) {
|
|
// TODO(tracyzhou): Add logging.
|
|
return;
|
|
}
|
|
|
|
appendConnectionEstablishmentStatus(
|
|
endpoint_id, ConnectionEstablishmentStatus::REMOTE_ENDPOINT_ACCEPTED);
|
|
}
|
|
|
|
template <typename Platform>
|
|
void ClientProxy<Platform>::remoteEndpointRejectedConnection(
|
|
const std::string& endpoint_id) {
|
|
Synchronized s(lock_.get());
|
|
|
|
if (hasRemoteEndpointResponded(endpoint_id)) {
|
|
// TODO(tracyzhou): Add logging.
|
|
return;
|
|
}
|
|
|
|
appendConnectionEstablishmentStatus(
|
|
endpoint_id, ConnectionEstablishmentStatus::REMOTE_ENDPOINT_REJECTED);
|
|
}
|
|
|
|
template <typename Platform>
|
|
bool ClientProxy<Platform>::isConnectionAccepted(
|
|
const std::string& endpoint_id) {
|
|
Synchronized s(lock_.get());
|
|
|
|
return connectionEstablishmentStatusesContains(
|
|
endpoint_id,
|
|
ConnectionEstablishmentStatus::LOCAL_ENDPOINT_ACCEPTED) &&
|
|
connectionEstablishmentStatusesContains(
|
|
endpoint_id,
|
|
ConnectionEstablishmentStatus::REMOTE_ENDPOINT_ACCEPTED);
|
|
}
|
|
|
|
template <typename Platform>
|
|
bool ClientProxy<Platform>::isConnectionRejected(
|
|
const std::string& endpoint_id) {
|
|
Synchronized s(lock_.get());
|
|
|
|
return connectionEstablishmentStatusesContains(
|
|
endpoint_id,
|
|
ConnectionEstablishmentStatus::LOCAL_ENDPOINT_REJECTED) ||
|
|
connectionEstablishmentStatusesContains(
|
|
endpoint_id,
|
|
ConnectionEstablishmentStatus::REMOTE_ENDPOINT_REJECTED);
|
|
}
|
|
|
|
template <typename Platform>
|
|
void ClientProxy<Platform>::onPayloadReceived(const std::string& endpoint_id,
|
|
ConstPtr<Payload> payload) {
|
|
Synchronized s(lock_.get());
|
|
|
|
// Avoid leaks.
|
|
ScopedPtr<ConstPtr<Payload>> scoped_payload(payload);
|
|
|
|
if (isConnectedToEndpoint(endpoint_id)) {
|
|
payload_listeners_.find(endpoint_id)
|
|
->second->onPayloadReceived(MakeConstPtr(new OnPayloadReceivedParams(
|
|
endpoint_id, scoped_payload.release())));
|
|
}
|
|
}
|
|
|
|
template <typename Platform>
|
|
void ClientProxy<Platform>::onPayloadTransferUpdate(
|
|
const std::string& endpoint_id,
|
|
const PayloadTransferUpdate& payload_transfer_update) {
|
|
Synchronized s(lock_.get());
|
|
|
|
if (isConnectedToEndpoint(endpoint_id)) {
|
|
payload_listeners_.find(endpoint_id)
|
|
->second->onPayloadTransferUpdate(
|
|
MakeConstPtr(new OnPayloadTransferUpdateParams(
|
|
endpoint_id, payload_transfer_update)));
|
|
}
|
|
}
|
|
|
|
template <typename Platform>
|
|
bool ClientProxy<Platform>::operator==(const ClientProxy<Platform>& rhs) {
|
|
return this->getClientId() == rhs.getClientId();
|
|
}
|
|
|
|
template <typename Platform>
|
|
bool ClientProxy<Platform>::operator<(const ClientProxy<Platform>& rhs) {
|
|
return this->getClientId() < rhs.getClientId();
|
|
}
|
|
|
|
template <typename Platform>
|
|
void ClientProxy<Platform>::removeAllEndpoints() {
|
|
Synchronized s(lock_.get());
|
|
|
|
// Note: we may want to notify the client of onDisconnected() for each
|
|
// endpoint, in the case when this is called from stopAllEndpoints(). For now,
|
|
// just remove without notifying.
|
|
for (ConnectionLifecycleListenersMap::iterator it =
|
|
connection_lifecycle_listeners_.begin();
|
|
it != connection_lifecycle_listeners_.end(); it++) {
|
|
it->second.destroy();
|
|
}
|
|
connection_lifecycle_listeners_.clear();
|
|
|
|
for (PayloadListenersMap::iterator it = payload_listeners_.begin();
|
|
it != payload_listeners_.end(); it++) {
|
|
it->second.destroy();
|
|
}
|
|
payload_listeners_.clear();
|
|
|
|
connection_establishment_statuses_.clear();
|
|
}
|
|
|
|
template <typename Platform>
|
|
bool ClientProxy<Platform>::connectionEstablishmentStatusesContains(
|
|
const std::string& endpoint_id,
|
|
typename ConnectionEstablishmentStatus::Value status_to_match) {
|
|
typename ConnectionEstablishmentStatusesMap::iterator it =
|
|
connection_establishment_statuses_.find(endpoint_id);
|
|
if (it == connection_establishment_statuses_.end()) {
|
|
return false;
|
|
}
|
|
const ConnectionMetadata& metadata = it->second;
|
|
return (metadata.status & status_to_match) != 0;
|
|
}
|
|
|
|
template <typename Platform>
|
|
void ClientProxy<Platform>::appendConnectionEstablishmentStatus(
|
|
const std::string& endpoint_id,
|
|
typename ConnectionEstablishmentStatus::Value status_to_append) {
|
|
typename ConnectionEstablishmentStatusesMap::iterator it =
|
|
connection_establishment_statuses_.find(endpoint_id);
|
|
if (it == connection_establishment_statuses_.end()) {
|
|
return;
|
|
}
|
|
ConnectionMetadata& metadata = it->second;
|
|
metadata.status = static_cast<typename ConnectionEstablishmentStatus::Value>(
|
|
metadata.status | status_to_append);
|
|
}
|
|
|
|
} // namespace connections
|
|
} // namespace nearby
|
|
} // namespace location
|