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/**
* Copyright (c) 2022, The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "MDnsService"
#include "MDnsService.h"
#include "binder_utils/BinderUtil.h"
#include "binder_utils/NetdPermissions.h"
#include <android-base/strings.h>
#include <binder/Status.h>
#include <string>
#include <vector>
using android::net::mdns::aidl::DiscoveryInfo;
using android::net::mdns::aidl::GetAddressInfo;
using android::net::mdns::aidl::IMDnsEventListener;
using android::net::mdns::aidl::RegistrationInfo;
using android::net::mdns::aidl::ResolutionInfo;
namespace android::net {
// TODO: DnsResolver has same macro definition but returns ScopedAStatus. Move these macros to
// BinderUtil.h to do the same permission check.
#define ENFORCE_ANY_PERMISSION(...) \
do { \
binder::Status status = checkAnyPermission({__VA_ARGS__}); \
if (!status.isOk()) { \
return status; \
} \
} while (0)
#define ENFORCE_NETWORK_STACK_PERMISSIONS() \
ENFORCE_ANY_PERMISSION(PERM_NETWORK_STACK, PERM_MAINLINE_NETWORK_STACK)
status_t MDnsService::start() {
IPCThreadState::self()->disableBackgroundScheduling(true);
const status_t ret = BinderService<MDnsService>::publish();
if (ret != android::OK) {
return ret;
}
return android::OK;
}
binder::Status MDnsService::startDaemon() {
ENFORCE_NETWORK_STACK_PERMISSIONS();
int res = mListener.startDaemon();
return statusFromErrcode(res);
}
binder::Status MDnsService::stopDaemon() {
ENFORCE_NETWORK_STACK_PERMISSIONS();
int res = mListener.stopDaemon();
return statusFromErrcode(res);
}
binder::Status MDnsService::registerService(const RegistrationInfo& info) {
ENFORCE_NETWORK_STACK_PERMISSIONS();
int res = mListener.serviceRegister(
info.id, info.serviceName.c_str(), info.registrationType.c_str(), nullptr /* domain */,
nullptr /* host */, info.port, info.txtRecord, info.interfaceIdx);
return statusFromErrcode(res);
}
binder::Status MDnsService::discover(const DiscoveryInfo& info) {
ENFORCE_NETWORK_STACK_PERMISSIONS();
int res = mListener.discover(info.interfaceIdx, info.registrationType.c_str(),
nullptr /* domain */, info.id, 0 /* requestFlags */);
return statusFromErrcode(res);
}
binder::Status MDnsService::resolve(const ResolutionInfo& info) {
ENFORCE_NETWORK_STACK_PERMISSIONS();
int res = mListener.resolveService(info.id, info.interfaceIdx, info.serviceName.c_str(),
info.registrationType.c_str(), info.domain.c_str());
return statusFromErrcode(res);
}
binder::Status MDnsService::getServiceAddress(const GetAddressInfo& info) {
ENFORCE_NETWORK_STACK_PERMISSIONS();
int res = mListener.getAddrInfo(info.id, info.interfaceIdx, 0 /* protocol */,
info.hostname.c_str());
return statusFromErrcode(res);
}
binder::Status MDnsService::stopOperation(int32_t id) {
ENFORCE_NETWORK_STACK_PERMISSIONS();
int res = mListener.stop(id);
return statusFromErrcode(res);
}
binder::Status MDnsService::registerEventListener(const android::sp<IMDnsEventListener>& listener) {
ENFORCE_NETWORK_STACK_PERMISSIONS();
int res = MDnsEventReporter::getInstance().addEventListener(listener);
return statusFromErrcode(res);
}
binder::Status MDnsService::unregisterEventListener(
const android::sp<IMDnsEventListener>& listener) {
ENFORCE_NETWORK_STACK_PERMISSIONS();
int res = MDnsEventReporter::getInstance().removeEventListener(listener);
return statusFromErrcode(res);
}
} // namespace android::net
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