1/********************************************************************
2 * Copyright (c) 2013 - 2014, Pivotal Inc.
3 * All rights reserved.
4 *
5 * Author: Zhanwei Wang
6 ********************************************************************/
7/********************************************************************
8 * 2014 -
9 * open source under Apache License Version 2.0
10 ********************************************************************/
11/**
12 * Licensed to the Apache Software Foundation (ASF) under one
13 * or more contributor license agreements. See the NOTICE file
14 * distributed with this work for additional information
15 * regarding copyright ownership. The ASF licenses this file
16 * to you under the Apache License, Version 2.0 (the
17 * "License"); you may not use this file except in compliance
18 * with the License. You may obtain a copy of the License at
19 *
20 * http://www.apache.org/licenses/LICENSE-2.0
21 *
22 * Unless required by applicable law or agreed to in writing, software
23 * distributed under the License is distributed on an "AS IS" BASIS,
24 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
25 * See the License for the specific language governing permissions and
26 * limitations under the License.
27 */
28#ifndef _HDFS_LIBHDFS3_CLIENT_PACKETHEADER_H_
29#define _HDFS_LIBHDFS3_CLIENT_PACKETHEADER_H_
30
31#include "datatransfer.pb.h"
32
33namespace Hdfs {
34namespace Internal {
35
36class PacketHeader {
37public:
38 PacketHeader();
39 PacketHeader(int packetLen, int64_t offsetInBlock, int64_t seqno,
40 bool lastPacketInBlock, int dataLen);
41 bool isLastPacketInBlock();
42 bool sanityCheck(int64_t lastSeqNo);
43 int getDataLen();
44 int getPacketLen();
45 int64_t getOffsetInBlock();
46 int64_t getSeqno();
47 void readFields(const char * buf, size_t size);
48 /**
49 * Write the header into the buffer.
50 * This requires that PKT_HEADER_LEN bytes are available.
51 */
52 void writeInBuffer(char * buf, size_t size);
53
54public:
55 static int GetPkgHeaderSize();
56 static int CalcPkgHeaderSize();
57
58private:
59 static int PkgHeaderSize;
60private:
61 int32_t packetLen;
62 PacketHeaderProto proto;
63};
64
65}
66}
67
68#endif /* _HDFS_LIBHDFS3_CLIENT_PACKETHEADER_H_ */
69