| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| package org.apache.metron.parsers.bro; |
| |
| import java.lang.invoke.MethodHandles; |
| import java.text.DecimalFormat; |
| import java.text.NumberFormat; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Map; |
| import org.apache.metron.common.Constants; |
| import org.apache.metron.common.utils.LazyLogger; |
| import org.apache.metron.common.utils.LazyLoggerFactory; |
| import org.apache.metron.parsers.BasicParser; |
| import org.json.simple.JSONArray; |
| import org.json.simple.JSONObject; |
| |
| @SuppressWarnings("serial") |
| public class BasicBroParser extends BasicParser { |
| |
| protected static final LazyLogger _LOG = LazyLoggerFactory.getLogger(MethodHandles.lookup().lookupClass()); |
| public static final ThreadLocal<NumberFormat> DECIMAL_FORMAT = new ThreadLocal<NumberFormat>() { |
| @Override |
| protected NumberFormat initialValue() { |
| return new DecimalFormat("0.0#####"); |
| } |
| }; |
| private JSONCleaner cleaner = new JSONCleaner(); |
| |
| @Override |
| public void configure(Map<String, Object> parserConfig) { |
| |
| } |
| |
| @Override |
| public void init() { |
| |
| } |
| |
| @Override |
| @SuppressWarnings("unchecked") |
| public List<JSONObject> parse(byte[] msg) { |
| |
| _LOG.trace("[Metron] Starting to parse incoming message"); |
| |
| String rawMessage = null; |
| List<JSONObject> messages = new ArrayList<>(); |
| try { |
| rawMessage = new String(msg, "UTF-8"); |
| _LOG.trace("[Metron] Received message: {}", rawMessage); |
| |
| JSONObject cleanedMessage = cleaner.clean(rawMessage); |
| _LOG.debug("[Metron] Cleaned message: {}", cleanedMessage); |
| |
| if (cleanedMessage == null || cleanedMessage.isEmpty()) { |
| throw new Exception("Unable to clean message: " + rawMessage); |
| } |
| |
| String key; |
| JSONObject payload; |
| if (cleanedMessage.containsKey("type")) { |
| key = cleanedMessage.get("type").toString(); |
| payload = cleanedMessage; |
| } else { |
| key = cleanedMessage.keySet().iterator().next().toString(); |
| |
| if (key == null) { |
| throw new Exception("Unable to retrieve key for message: " |
| + rawMessage); |
| } |
| |
| payload = (JSONObject) cleanedMessage.get(key); |
| } |
| |
| if (payload == null) { |
| throw new Exception("Unable to retrieve payload for message: " |
| + rawMessage); |
| } |
| |
| String originalString = key.toUpperCase() + " |"; |
| for (Object k : payload.keySet()) { |
| Object raw = payload.get(k); |
| String value = raw.toString(); |
| if (raw instanceof Double) { |
| value = DECIMAL_FORMAT.get().format(raw); |
| } |
| originalString += " " + k.toString() + ":" + value; |
| } |
| payload.put("original_string", originalString); |
| |
| replaceKey(payload, Constants.Fields.TIMESTAMP.getName(), new String[]{ "ts" }); |
| |
| long timestamp = 0L; |
| if (payload.containsKey(Constants.Fields.TIMESTAMP.getName())) { |
| try { |
| Double broTimestamp = ((Number) payload.get(Constants.Fields.TIMESTAMP.getName())).doubleValue(); |
| String broTimestampFormatted = DECIMAL_FORMAT.get().format(broTimestamp); |
| timestamp = convertToMillis(broTimestamp); |
| payload.put(Constants.Fields.TIMESTAMP.getName(), timestamp); |
| payload.put("bro_timestamp", broTimestampFormatted); |
| _LOG.trace("[Metron] new bro record - timestamp : {}", () -> payload.get(Constants.Fields.TIMESTAMP.getName())); |
| } catch (NumberFormatException nfe) { |
| _LOG.error("[Metron] timestamp is invalid: {}", payload.get("timestamp")); |
| payload.put(Constants.Fields.TIMESTAMP.getName(), 0); |
| } |
| } |
| |
| boolean ipSrcReplaced = replaceKey(payload, Constants.Fields.SRC_ADDR.getName(), new String[]{"source_ip", "id.orig_h"}); |
| if (!ipSrcReplaced) { |
| replaceKeyArray(payload, Constants.Fields.SRC_ADDR.getName(), new String[]{ "tx_hosts" }); |
| } |
| |
| boolean ipDstReplaced = replaceKey(payload, Constants.Fields.DST_ADDR.getName(), new String[]{"dest_ip", "id.resp_h"}); |
| if (!ipDstReplaced) { |
| replaceKeyArray(payload, Constants.Fields.DST_ADDR.getName(), new String[]{ "rx_hosts" }); |
| } |
| |
| replaceKey(payload, Constants.Fields.SRC_PORT.getName(), new String[]{"source_port", "id.orig_p"}); |
| replaceKey(payload, Constants.Fields.DST_PORT.getName(), new String[]{"dest_port", "id.resp_p"}); |
| |
| payload.put(Constants.Fields.PROTOCOL.getName(), key); |
| _LOG.debug("[Metron] Returning parsed message: {}", payload); |
| messages.add(payload); |
| return messages; |
| |
| } catch (Exception e) { |
| String message = "Unable to parse Message: " + rawMessage; |
| _LOG.error(message, e); |
| throw new IllegalStateException(message, e); |
| } |
| |
| } |
| |
| private Long convertToMillis(Double timestampSeconds) { |
| return ((Double) (timestampSeconds * 1000)).longValue(); |
| } |
| |
| private boolean replaceKey(JSONObject payload, String toKey, String[] fromKeys) { |
| for (String fromKey : fromKeys) { |
| if (payload.containsKey(fromKey)) { |
| Object value = payload.remove(fromKey); |
| payload.put(toKey, value); |
| _LOG.trace("[Metron] Added {} to {}", toKey, payload); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| private boolean replaceKeyArray(JSONObject payload, String toKey, String[] fromKeys) { |
| for (String fromKey : fromKeys) { |
| if (payload.containsKey(fromKey)) { |
| JSONArray value = (JSONArray) payload.remove(fromKey); |
| if (value != null && !value.isEmpty()) { |
| payload.put(toKey, value.get(0)); |
| _LOG.trace("[Metron] Added {} to {}", toKey, payload); |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| } |