| /* |
| * Copyright 2015-present Open Networking Laboratory |
| * |
| * 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. |
| */ |
| package org.onlab.util; |
| |
| import org.jboss.netty.buffer.ChannelBuffer; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * HexDump class an utility to dump buffer in hex format. |
| */ |
| public final class HexDump { |
| protected static final Logger log = LoggerFactory.getLogger(HexDump.class); |
| |
| private HexDump() { |
| } |
| |
| /** |
| * Dump the buffer content in hex format. |
| * |
| * @param buff buffer content to dump in hex format |
| */ |
| public static void dump(ChannelBuffer buff) { |
| buff.markReaderIndex(); |
| try { |
| do { |
| StringBuilder sb = new StringBuilder(); |
| for (int k = 0; (k < 16) && (buff.readableBytes() != 0); ++k) { |
| if (0 == k % 4) { |
| sb.append(String.format(" ")); // blank after 4 bytes |
| } |
| sb.append(String.format("%02X ", buff.readByte())); |
| } |
| log.debug(sb.toString()); |
| } while (buff.readableBytes() != 0); |
| } catch (Exception e) { |
| log.error("[HexDump] Invalid buffer: " + e.toString()); |
| } |
| buff.resetReaderIndex(); |
| } |
| } |