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/*
* Copyright (C) 2024 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.
*/
#include <string>
#include "perfetto/base/status.h"
#include "perfetto/protozero/field.h"
#include "src/trace_redaction/filter_packet_using_allowlist.h"
#include "src/trace_redaction/trace_redaction_framework.h"
namespace perfetto::trace_redaction {
base::Status FilterPacketUsingAllowlist::VerifyContext(
const Context& context) const {
if (context.trace_packet_allow_list.empty()) {
return base::ErrStatus("FilterPacketUsingAllowlist: missing allow-list.");
}
return base::OkStatus();
}
bool FilterPacketUsingAllowlist::KeepPacket(const Context& context,
const std::string& bytes) const {
PERFETTO_DCHECK(!context.trace_packet_allow_list.empty());
const auto& allow_list = context.trace_packet_allow_list;
protozero::ProtoDecoder decoder(bytes);
// A packet should only have one data type (proto oneof), but there are other
// values in the packet (e.g. timestamp). If one field is in the allowlist,
// then allow the whole trace packet.
for (auto field = decoder.ReadField(); field.valid();
field = decoder.ReadField()) {
if (allow_list.count(field.id()) != 0) {
return true;
}
}
return false;
}
} // namespace perfetto::trace_redaction
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