/* packet-hdfsdata.c

 * HDFS data Protocol and dissectors

 *

 * Copyright (c) 2011 by Isilon Systems.

 *

 * Author: Allison Obourn <aobourn@isilon.com>

 *

 * Wireshark - Network traffic analyzer

 * By Gerald Combs <gerald@wireshark.org>

 * Copyright 1999 Gerald Combs

 *

 * SPDX-License-Identifier: GPL-2.0-or-later

 */

#include "config.h"

#include <epan/packet.h>

#include "packet-tcp.h"

void proto_register_hdfsdata(void);

void proto_reg_handoff_hdfsdata(void);

#if 0

#define NAMENODE_PORT 8020

#define DATANODE_PORT 8021

#endif

#define FIRST_READ_FRAGMENT_LEN 15

#define SECOND_READ_FRAGMENT_LEN 29

#define LAST_READ_FRAGMENT_LEN 4

#define WRITE_OP 80

#define READ_OP 81

#define MIN_WRITE_REQ 35

#define MIN_READ_REQ 36

#define STATUS_SUCCESS 6

#define PIPELINE_LEN 1

#define STATUS_LEN 2

#define FINISH_REQ_LEN 4

#define END_PACKET_LEN 8

#define READ_RESP_HEAD_LEN 19

#define WRITE_RESP_HEAD_LEN 21

#define WRITE_REQ_HEAD_LEN 7

#define CRC 1

#define CRC_SIZE 8.0

#define CHUNKSIZE_START 3

#if 0

static const int RESPONSE_HEADER = 1;

static const int RESPONSE_METADATA = 2;

static const int RESPONSE_DATA = 3;

#endif

static int proto_hdfsdata;

static int hf_hdfsdata_version;

static int hf_hdfsdata_cmd;

static int hf_hdfsdata_blockid;

static int hf_hdfsdata_timestamp;

static int hf_hdfsdata_startoffset;

static int hf_hdfsdata_blocklen;

static int hf_hdfsdata_clientlen;

static int hf_hdfsdata_clientid;

static int hf_hdfsdata_tokenlen;

static int hf_hdfsdata_tokenid;

static int hf_hdfsdata_tokenpassword;

static int hf_hdfsdata_tokentype;

static int hf_hdfsdata_tokenservice;

static int hf_hdfsdata_status;

static int hf_hdfsdata_checksumtype;

static int hf_hdfsdata_chunksize;

static int hf_hdfsdata_chunkoffset;

static int hf_hdfsdata_datalength;

static int hf_hdfsdata_inblockoffset;

static int hf_hdfsdata_seqnum;

static int hf_hdfsdata_last;

static int hf_hdfsdata_crc32;

static int hf_hdfsdata_datalen;

static int hf_hdfsdata_rest;

static int hf_hdfsdata_end;

static int hf_hdfsdata_packetsize;

static int hf_hdfsdata_chunklength;

static int hf_hdfsdata_crc64;

static int hf_hdfsdata_pipelinestatus;

static int hf_hdfsdata_pipelinenum;

static int hf_hdfsdata_recovery;

static int hf_hdfsdata_sourcenode;

static int hf_hdfsdata_currentpipeline;

static int hf_hdfsdata_node;

static int ett_hdfsdata;

static dissector_handle_t hdfsdata_handle;

/* Taken from HDFS

   Parse the first byte of a vint/vlong to determine the number of bytes

   value is the first byte of the vint/vlong

   returns the total number of bytes (1 to 9) */

static int

decode_vint_size (int8_t value) {

  if (value >= -112) {

    return 1;

  } else if (value < -120) {

    return -119 - value;

  }

  return -111 - value;

}

/* Taken from HDFS

   converts a variable length number into a long and discovers how many bytes it is

   returns the decoded number */

static unsigned

dissect_variable_length_long (tvbuff_t *tvb, proto_tree *hdfsdata_tree, int* offset)

{

  int byte_count = 1;

  int idx = 0;

  unsigned i = 0;

  int8_t first_byte = tvb_get_uint8(tvb, *offset);

  unsigned size = 0;

  int len = decode_vint_size(first_byte);

  if (len == 1) {

    proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_clientlen, tvb, *offset, byte_count, ENC_BIG_ENDIAN);

    *offset = (*offset) + byte_count;

    return first_byte;

  }

  for  (idx = 0; idx < len-1; idx++) {

    char b = tvb_get_uint8(tvb, *offset + byte_count);

    byte_count++;

    i = i << 8;

    i = i | (b & 0xFF);

  }

  size = ((first_byte < -120 || (first_byte >= -112 && first_byte < 0)) ? (i ^ 0xFFFFFFFF) : i);

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_clientlen, tvb, *offset, byte_count, ENC_BIG_ENDIAN);

  *offset = (*offset) + byte_count;

  return size;

}

/* dissects a variable length int and then using its value dissects the following string */

static void

dissect_variable_int_string(tvbuff_t *tvb, proto_tree *hdfsdata_tree, int *offset)

{

  /* Get the variable length int that represents the length of the next field */

  int len = dissect_variable_length_long (tvb, hdfsdata_tree, offset);

  /* client id = amount of bytes in previous */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_clientid, tvb, *offset, len, ENC_ASCII);

  *offset += len;

}

/* dissects the access tokens that appear at the end of requests.

 tokens: id, password, kind, service */

static void

dissect_access_tokens(tvbuff_t *tvb, proto_tree *hdfsdata_tree, int *offset)

{

  int len = 0;

  len = tvb_get_uint8(tvb, *offset);

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_tokenlen, tvb, *offset, 1, ENC_BIG_ENDIAN);

  *offset += 1;

  /* token id = amount of bytes in previous */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_tokenid, tvb, *offset, len, ENC_ASCII);

  *offset += len;

  len = tvb_get_uint8(tvb, *offset);

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_tokenlen, tvb, *offset, 1, ENC_BIG_ENDIAN);

  *offset += 1;

  /* token password = amount of bytes in previous */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_tokenpassword, tvb, *offset, len, ENC_ASCII);

  *offset += len;

  len = tvb_get_uint8(tvb, *offset);

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_tokenlen, tvb, *offset, 1, ENC_BIG_ENDIAN);

  *offset += 1;

  /* token type = amount of bytes in previous */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_tokentype, tvb, *offset, len, ENC_ASCII);

  *offset += len;

  len = tvb_get_uint8(tvb, *offset);

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_tokenlen, tvb, *offset, 1, ENC_BIG_ENDIAN);

  *offset += 1;

  /* token service = amount of bytes in previous; */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_tokenservice, tvb, *offset, len, ENC_ASCII);

  *offset += len;

}

/* handles parsing read response packets */

static void

dissect_read_response(tvbuff_t *tvb, proto_tree *hdfsdata_tree, int offset)

{

  int len = 0;

  uint32_t chunksize;

  /* 4 bytes = data length */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_datalength, tvb, offset, 4, ENC_BIG_ENDIAN);

  offset += 4;

  /* 8 bytes = in block offset */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_inblockoffset, tvb, offset, 8, ENC_BIG_ENDIAN);

  offset += 8;

  /* 8 bytes = sequence number */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_seqnum, tvb, offset, 8, ENC_BIG_ENDIAN);

  offset += 8;

  /* 1 byte = last packet in block */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_last, tvb, offset, 1, ENC_BIG_ENDIAN);

  offset += 1;

  /* 4 byte = length of data */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_datalen, tvb, offset, 4, ENC_BIG_ENDIAN);

  offset += 4;

  /* if there is a crc checksum it is 8* the length of the data * checksum size / chunksize */

  chunksize = tvb_get_ntohl(tvb, CHUNKSIZE_START);

  if (chunksize == 0)   /* let's not divide by zero */

    return;

  if (tvb_get_uint8(tvb, 2) == CRC) {

    len = (int)(CRC_SIZE * tvb_get_ntohl(tvb, offset - 4) *

      tvb_get_ntohl(tvb, offset - 8) / chunksize);

  }

  /* the rest of bytes (usually 4) = crc32 code */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_crc32, tvb, offset, len, ENC_BIG_ENDIAN);

  /* offset += len; */

}

/* dissects the first packet of the read response */

static void

dissect_read_response_start(tvbuff_t *tvb, proto_tree *hdfsdata_tree, int offset) {

  /* 2 bytes = status code */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_status, tvb, offset, 2, ENC_BIG_ENDIAN);

  offset += 2;

  /* checksum type = 1 byte. 1 = crc32, 0 = null */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_checksumtype, tvb, offset, 1, ENC_BIG_ENDIAN);

  offset += 1;

  /* 4 bytes = chunksize */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_chunksize, tvb, offset, 4, ENC_BIG_ENDIAN);

  offset += 4;

  /* 8 bytes = chunk offset */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_chunkoffset, tvb, offset, 8, ENC_BIG_ENDIAN);

  /* offset += 8; */

}

/* dissects the fields specific to a read request */

static void

dissect_read_request(tvbuff_t *tvb, proto_tree *hdfsdata_tree, int *offset)

{

  /* 8 bytes = start offset */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_startoffset, tvb, *offset, 8, ENC_BIG_ENDIAN);

  *offset += 8;

  /* 8 bytes = block length */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_blocklen, tvb, *offset, 8, ENC_BIG_ENDIAN);

  *offset += 8;

}

/* dissects the fields specific to a write request */

static void

dissect_write_request(tvbuff_t *tvb, proto_tree *hdfsdata_tree, int *offset)

{

  /* 4 bytes = number of nodes in pipeline */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_pipelinenum, tvb, *offset, 4, ENC_BIG_ENDIAN);

  *offset += 4;

  /* 1 bytes = recovery boolean */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_recovery, tvb, *offset, 1, ENC_BIG_ENDIAN);

  *offset += 1;

}

/* dissects the fields specific to a write request */

static void

dissect_write_request_end(tvbuff_t *tvb, proto_tree *hdfsdata_tree, int *offset)

{

  int i = 0;

  int len = 0;

  /* 1 bytes = source node */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_sourcenode, tvb, *offset, 1, ENC_BIG_ENDIAN);

  *offset += 1;

  /* 4 bytes = number of nodes currently in the pipeline (usually just -1 of before) */

  len = tvb_get_ntohl(tvb, *offset);

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_currentpipeline, tvb, *offset, 4, ENC_BIG_ENDIAN);

  *offset += 4;

  /* variable length sequence of node objects */

  for (i = 0; i < len; i++) {

    proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_node, tvb, *offset, 4, ENC_BIG_ENDIAN);

    *offset += 4;

  }

}

/* dissects the beginning of the read and write request messages */

static int

dissect_header(tvbuff_t *tvb, proto_tree *hdfsdata_tree, int* offset){

  int command = 0;

  /* 2 bytes = protocol version */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_version, tvb, *offset, 2, ENC_BIG_ENDIAN);

  *offset += 2;

  /* 1 byte = command */

  command = tvb_get_uint8(tvb, *offset);

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_cmd, tvb, *offset, 1, ENC_BIG_ENDIAN);

  *offset += 1;

  /* 8 bytes = block id */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_blockid, tvb, *offset, 8, ENC_BIG_ENDIAN);

  *offset += 8;

  /* 8 bytes = timestamp */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_timestamp, tvb, *offset, 8, ENC_BIG_ENDIAN);

  *offset += 8;

  return command;

}

/* decodes the write response messages */

static void

dissect_write_response(tvbuff_t *tvb, proto_tree *hdfsdata_tree, int offset)

{

  /* 4 bytes = packetsize */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_packetsize, tvb, offset, 4, ENC_BIG_ENDIAN);

  offset += 4;

  /* 8 bytes = offset in block */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_startoffset, tvb, offset, 8, ENC_BIG_ENDIAN);

  offset += 8;

  /* 8 bytes = sequence number */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_seqnum, tvb, offset, 8, ENC_BIG_ENDIAN);

  offset += 8;

  /* 1 bytes = last packet */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_last, tvb, offset, 1, ENC_BIG_ENDIAN);

  offset += 1;

  /* 4 bytes = chunk length */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_chunklength, tvb, offset, 4, ENC_BIG_ENDIAN);

  offset += 4;

  /* 8 bytes = crc code */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_crc64, tvb, offset, 8, ENC_BIG_ENDIAN);

  offset += 8;

  /* add the rest -> RESPONSE_DATA */

  proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_rest, tvb, offset, (tvb_reported_length(tvb)) - offset, ENC_ASCII);

   /* offset += (tvb_reported_length(tvb)); */

}

/* determine PDU length of protocol  */

static unsigned

get_hdfsdata_message_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset, void *data _U_)

{

  /* get data packet len, add FIRST_READ_FRAGMENT_LEN for first fragment (before len),

     SECOND_READ_FRAGMENT_LEN for second fragment (incl len), subtract 4 for length itself. */

  if (tvb_reported_length(tvb) <= 4 || tvb_reported_length(tvb) == END_PACKET_LEN

    || tvb_get_ntohl(tvb, 0) == tvb_reported_length(tvb) - WRITE_RESP_HEAD_LEN

    || (tvb_reported_length(tvb) >= MIN_READ_REQ && tvb_get_uint8(tvb, 2) == READ_OP)

    || (tvb_reported_length(tvb) >= MIN_WRITE_REQ && tvb_get_uint8(tvb, 2) == WRITE_OP)) {

    return tvb_reported_length(tvb);

  }

  return tvb_get_ntohl(tvb, offset + FIRST_READ_FRAGMENT_LEN) +

    FIRST_READ_FRAGMENT_LEN + SECOND_READ_FRAGMENT_LEN - LAST_READ_FRAGMENT_LEN;

}

/* This method dissects fully reassembled messages */

static int

dissect_hdfsdata_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)

{

  int offset = 0;

  col_set_str(pinfo->cinfo, COL_PROTOCOL, "HDFSDATA");

  /* Clear out stuff in the info column */

  col_set_str(pinfo->cinfo, COL_INFO, "HDFS Data");

  if (tree) {

    proto_item *ti = NULL;

    proto_tree *hdfsdata_tree = NULL;

    ti = proto_tree_add_item(tree, proto_hdfsdata, tvb, offset, -1, ENC_NA);

    hdfsdata_tree = proto_item_add_subtree(ti, ett_hdfsdata);

    /* if only 1 bytes packet must just contain just the pipeline status */

    if ((tvb_reported_length(tvb)) == PIPELINE_LEN) {

      /* 1 bytes = pipeline status */

      proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_pipelinestatus, tvb, offset, PIPELINE_LEN, ENC_BIG_ENDIAN);

    /* if only 2 bytes packet must just contain just a status code */

    } else if ((tvb_reported_length(tvb)) == STATUS_LEN) {

      /* 2 bytes = status code */

      proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_status, tvb, offset, STATUS_LEN, ENC_BIG_ENDIAN);

    /* if it is 4 bytes long it must be a finish request packet */

    } else if ((tvb_reported_length(tvb)) == FINISH_REQ_LEN) {

      proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_end, tvb, offset, 4, ENC_BIG_ENDIAN);

    /* read response packet */

    } else if (tvb_reported_length(tvb) >= READ_RESP_HEAD_LEN && tvb_reported_length(tvb) ==

      tvb_get_ntohl(tvb, FIRST_READ_FRAGMENT_LEN) +

      FIRST_READ_FRAGMENT_LEN + SECOND_READ_FRAGMENT_LEN - LAST_READ_FRAGMENT_LEN){

      dissect_read_response_start(tvb, hdfsdata_tree, offset);

      offset += FIRST_READ_FRAGMENT_LEN;

      dissect_read_response(tvb, hdfsdata_tree, offset);

      offset+= SECOND_READ_FRAGMENT_LEN;

      /* This message just contains data so we can display it all as one block */

      proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_rest, tvb, offset, (tvb_reported_length(tvb)) - offset, ENC_ASCII);

    } else {

      uint8_t op = tvb_get_uint8(tvb, 2);

      /* READ  request */

      if ((tvb_reported_length(tvb)) >= MIN_READ_REQ && op == READ_OP) {

        dissect_header(tvb, hdfsdata_tree, &offset);

        dissect_read_request(tvb, hdfsdata_tree, &offset);

        dissect_variable_int_string(tvb, hdfsdata_tree, &offset);

        dissect_access_tokens(tvb, hdfsdata_tree, &offset);

      /* WRITE request */

      } else if ((tvb_reported_length(tvb)) >= MIN_WRITE_REQ && op == WRITE_OP) {

        dissect_header(tvb, hdfsdata_tree, &offset);

        dissect_write_request(tvb, hdfsdata_tree, &offset);

        dissect_variable_int_string(tvb, hdfsdata_tree, &offset);

        dissect_write_request_end(tvb, hdfsdata_tree, &offset);

        dissect_access_tokens(tvb, hdfsdata_tree, &offset);

        /* checksum type = 1 byte. 1 = crc32, 0 = null */

        proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_checksumtype, tvb, offset, 1, ENC_BIG_ENDIAN);

        offset += 1;

        /* 4 bytes = chunksize */

        proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_chunksize, tvb, offset, 4, ENC_BIG_ENDIAN);

      /* write responses store the data length in the first 4 bytes. This length does not

         include 21 bits of header */

      } else if (tvb_reported_length(tvb) >= 4 && tvb_get_ntohl(tvb, 0) ==

        tvb_reported_length(tvb) - WRITE_RESP_HEAD_LEN) {

        dissect_write_response(tvb, hdfsdata_tree, offset);

      } else {

        /* This message contains some form of data that we have not successfully been able to

           pattern match and catagorize. Display all of it as data. */

        proto_tree_add_item(hdfsdata_tree, hf_hdfsdata_rest, tvb, offset, (tvb_reported_length(tvb)), ENC_ASCII);

      }

    }

  }

  return tvb_captured_length(tvb);

}

static int

dissect_hdfsdata(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)

{

  int frame_header_len = 0;

  bool need_reassemble = false;

  uint8_t op = 0;

  bool only_packet = tvb_reported_length(tvb) == 1 || (tvb_reported_length(tvb) == 2 &&

    tvb_get_ntohs(tvb, 0) == STATUS_SUCCESS);

  if (tvb_reported_length(tvb) >= 3)

    op = tvb_get_uint8(tvb, 2);

  if (!only_packet && tvb_reported_length(tvb) != 4 && !(tvb_reported_length(tvb) >= MIN_READ_REQ && op == READ_OP) &&

    !(tvb_reported_length(tvb) >= MIN_WRITE_REQ && op == WRITE_OP) && !(tvb_reported_length(tvb) == END_PACKET_LEN &&

    !tvb_get_ntohl(tvb, 0) && !tvb_get_ntohl(tvb, 4))) {

    need_reassemble = true;

  }

  /* setting the header size for the different types of packets */

  if (only_packet || tvb_reported_length(tvb) == END_PACKET_LEN) {

    frame_header_len = tvb_reported_length(tvb);

  } else if (tvb_reported_length(tvb) == FIRST_READ_FRAGMENT_LEN ||(tvb_reported_length(tvb) >= MIN_READ_REQ &&

    op == READ_OP && !((tvb_reported_length(tvb)) == 2 && !tvb_get_ntohs(tvb, 0)))) {

    frame_header_len = READ_RESP_HEAD_LEN;

  } else if (tvb_reported_length(tvb) >= MIN_WRITE_REQ && op == WRITE_OP) {

    frame_header_len = WRITE_REQ_HEAD_LEN;

  }

  tcp_dissect_pdus(tvb, pinfo, tree, need_reassemble, frame_header_len, get_hdfsdata_message_len, dissect_hdfsdata_message, data);

  return tvb_captured_length(tvb);

}

/* registers the protocol with the given names */

void

proto_register_hdfsdata(void)

{

    static hf_register_info hf[] = {

  /* list of all options for dissecting the protocol */

  /*************************************************

  Read request

  **************************************************/

  { &hf_hdfsdata_version,

    { "HDFSDATA protocol version", "hdfsdata.version",

      FT_UINT16, BASE_DEC,

      NULL, 0x0,

      NULL, HFILL }

  },

  { &hf_hdfsdata_cmd,

    { "HDFSDATA command", "hdfsdata.cmd",

      FT_UINT8, BASE_DEC,

      NULL, 0x0,

      NULL, HFILL }

  },

  { &hf_hdfsdata_blockid,

    { "HDFSDATA block id", "hdfsdata.blockid",

      FT_UINT64, BASE_DEC,

      NULL, 0x0,

      NULL, HFILL }

  },

  { &hf_hdfsdata_timestamp,

    { "HDFSDATA timestamp", "hdfsdata.timestamp",

      FT_UINT64, BASE_DEC,

      NULL, 0x0,

      NULL, HFILL }

  },

  /***

  Read specific

  ***/

  { &hf_hdfsdata_startoffset,

    { "HDFSDATA start offset", "hdfsdata.startoffset",

      FT_UINT64, BASE_DEC,

      NULL, 0x0,

      NULL, HFILL }

  },

  { &hf_hdfsdata_blocklen,

    { "HDFSDATA block length", "hdfsdata.blocklen",

      FT_UINT64, BASE_DEC,

      NULL, 0x0,

      NULL, HFILL }

  },

  /***

  Write specific

  ***/

  { &hf_hdfsdata_pipelinenum,

    { "HDFSDATA number in pipeline", "hdfsdata.pipelinenum",

      FT_UINT32, BASE_DEC,

      NULL, 0x0,

      NULL, HFILL }

  },

  { &hf_hdfsdata_recovery,

    { "HDFSDATA recovery boolean", "hdfsdata.recovery",

      FT_UINT8, BASE_DEC,

      NULL, 0x0,

      NULL, HFILL }

  },

  { &hf_hdfsdata_sourcenode,

    { "HDFSDATA source node", "hdfsdata.sourcenode",

      FT_UINT8, BASE_DEC,

      NULL, 0x0,

      NULL, HFILL }

  },

  { &hf_hdfsdata_currentpipeline,

    { "HDFSDATA current number of nodes in the pipeline", "hdfsdata.currentpipeline",

      FT_UINT32, BASE_DEC,

      NULL, 0x0,

      NULL, HFILL }

  },

  { &hf_hdfsdata_node,

    { "HDFSDATA node object", "hdfsdata.node",

      FT_UINT32, BASE_DEC,

      NULL, 0x0,

      NULL, HFILL }

  },

  /***

  Var length

  **/

  { &hf_hdfsdata_clientlen,

    { "HDFSDATA client id length", "hdfsdata.clientlen",

      FT_UINT8, BASE_DEC,

      NULL, 0x0,

      NULL, HFILL }

  },

  { &hf_hdfsdata_clientid,

    { "HDFSDATA client id", "hdfsdata.clientid",

      FT_STRING, BASE_NONE,

      NULL, 0x0,

      NULL, HFILL }

  },

  { &hf_hdfsdata_end,

    { "HDFSDATA end data request", "hdfsdata.end",

      FT_UINT32, BASE_DEC,

      NULL, 0x0,

      NULL, HFILL }

  },

  /*************************************************

  Access tokens

  **************************************************/

  { &hf_hdfsdata_tokenlen,

    { "HDFSDATA access token length", "hdfsdata.tokenlen",

      FT_UINT8, BASE_DEC,

      NULL, 0x0,

      NULL, HFILL }

  },

  { &hf_hdfsdata_tokenid,

    { "HDFSDATA access token ID", "hdfsdata.tokenid",

      FT_STRING, BASE_NONE,

      NULL, 0x0,

      NULL, HFILL }

  },

  { &hf_hdfsdata_tokenpassword,

    { "HDFSDATA access token password", "hdfsdata.tokenpassword",

      FT_STRING, BASE_NONE,

      NULL, 0x0,

      NULL, HFILL }

  },

  { &hf_hdfsdata_tokentype,

    { "HDFSDATA access token type", "hdfsdata.tokentype",

      FT_STRING, BASE_NONE,

      NULL, 0x0,

      NULL, HFILL }

  },

  { &hf_hdfsdata_tokenservice,

    { "HDFSDATA access token service", "hdfsdata.tokenservice",

      FT_STRING, BASE_NONE,

      NULL, 0x0,

      NULL, HFILL }

  },

  /***********************************************

  Responses 1

  ***********************************************/

  { &hf_hdfsdata_status,

    { "HDFSDATA status code", "hdfsdata.status",

      FT_UINT16, BASE_DEC,

      NULL, 0x0,

      NULL, HFILL }

  },

  { &hf_hdfsdata_checksumtype,

    { "HDFSDATA checksum type", "hdfsdata.checksumtype",

      FT_UINT8, BASE_DEC,

      NULL, 0x0,

      NULL, HFILL }

  },

  { &hf_hdfsdata_chunksize,

    { "HDFSDATA chunk size", "hdfsdata.chunksize",

      FT_UINT32, BASE_DEC,

      NULL, 0x0,

      NULL, HFILL }

  },

  { &hf_hdfsdata_chunkoffset,

    { "HDFSDATA chunk offset", "hdfsdata.chunkoffset",

      FT_UINT64, BASE_DEC,

      NULL, 0x0,

      NULL, HFILL }

  },

  /***********************************************

  Responses 2

  ***********************************************/

  { &hf_hdfsdata_datalength,

    { "HDFSDATA length of data", "hdfsdata.datalength",

      FT_UINT32, BASE_DEC,

      NULL, 0x0,

      NULL, HFILL }

  },

  { &hf_hdfsdata_inblockoffset,

    { "HDFSDATA in block offset", "hdfsdata.inblockoffset",

      FT_UINT64, BASE_DEC,

      NULL, 0x0,

      NULL, HFILL }

  },

  { &hf_hdfsdata_seqnum,

    { "HDFSDATA sequence number", "hdfsdata.seqnum",

      FT_UINT64, BASE_DEC,

      NULL, 0x0,

      NULL, HFILL }

  },

  { &hf_hdfsdata_last,

    { "HDFSDATA last packet in block", "hdfsdata.last",

      FT_INT8, BASE_DEC,

      NULL, 0x0,

      NULL, HFILL }

  },

  { &hf_hdfsdata_datalen,

    { "HDFSDATA length of data", "hdfsdata.datalen",

      FT_INT32, BASE_DEC,

      NULL, 0x0,

      NULL, HFILL }

  },

  { &hf_hdfsdata_crc32,

    { "HDFSDATA crc32 checksum", "hdfsdata.crc32",

      FT_INT32, BASE_DEC,

      NULL, 0x0,

      NULL, HFILL }

  },

  /***********************************************

  Responses 3

  ***********************************************/

  { &hf_hdfsdata_rest,

    { "HDFSDATA data", "hdfsdata.rest",

      FT_STRING, BASE_NONE,

      NULL, 0x0,

      NULL, HFILL }

  },

  /***********************************************

  Write Response 1

  ***********************************************/

  { &hf_hdfsdata_packetsize,

    { "HDFSDATA packet size", "hdfsdata.packetsize",

      FT_UINT32, BASE_DEC,

      NULL, 0x0,

      NULL, HFILL }

  },

  { &hf_hdfsdata_chunklength,

    { "HDFSDATA chunk length", "hdfsdata.chunklength",

      FT_UINT32, BASE_DEC,

      NULL, 0x0,

      NULL, HFILL }

  },

  { &hf_hdfsdata_crc64,

    { "HDFSDATA crc64 checksum", "hdfsdata.crc64",

      FT_INT64, BASE_DEC,

      NULL, 0x0,

      NULL, HFILL }

  },

  { &hf_hdfsdata_pipelinestatus,

    { "HDFSDATA pipeline status", "hdfsdata.pipelinestatus",

      FT_INT8, BASE_DEC,

      NULL, 0x0,

      NULL, HFILL }

  },

    };

    /* Setup protocol subtree array */

    static int *ett[] = {

        &ett_hdfsdata

    };

    proto_hdfsdata = proto_register_protocol ("HDFSDATA Protocol", "HDFSDATA", "hdfsdata");

    proto_register_field_array(proto_hdfsdata, hf, array_length(hf));

    proto_register_subtree_array(ett, array_length(ett));

    hdfsdata_handle = register_dissector("hdfsdata", dissect_hdfsdata, proto_hdfsdata);

}

/* registers handoff */

void

proto_reg_handoff_hdfsdata(void)

{

    dissector_add_for_decode_as_with_preference("tcp.port", hdfsdata_handle);

}

/*

 * Editor modelines

 *

 * Local Variables:

 * c-basic-offset: 2

 * tab-width: 8

 * indent-tabs-mode: nil

 * End:

 *

 * ex: set shiftwidth=2 tabstop=8 expandtab:

 * :indentSize=2:tabSize=8:noTabs=true:

 */