/* packet-ax4000.c

 * Routines for Spirent AX/4000 Test Block dissection

 * Copyright 2004, SEKINE Hideki <sekineh@gf7.so-net.ne.jp>

 *

 * Wireshark - Network traffic analyzer

 * By Gerald Combs <gerald@wireshark.org>

 * Copyright 1998 Gerald Combs

 *

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

 */

#include "config.h"

#include <epan/packet.h>

void proto_register_ax4000(void);

void proto_reg_handoff_ax4000(void);

static dissector_handle_t ax4000_handle;

/* Initialize the protocol and registered fields */

static int proto_ax4000;

static int hf_ax4000_port;

static int hf_ax4000_chassis;

static int hf_ax4000_fill;

static int hf_ax4000_index;

static int hf_ax4000_timestamp;

static int hf_ax4000_seq;

static int hf_ax4000_crc;

/* Initialize the subtree pointers */

static int ett_ax4000;

/* Code to actually dissect the packets */

static int

dissect_ax4000(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)

{

  proto_item *ti;

  proto_tree *ax4000_tree;

  uint32_t ax_port, ax_chassis, ax_index, ax_seq, ax_timestamp;

  /* Make entries in Protocol column and Info column on summary display */

  col_set_str(pinfo->cinfo, COL_PROTOCOL, "AX4000");

  col_clear(pinfo->cinfo, COL_INFO);

  /* create display subtree for the protocol */

  ti = proto_tree_add_item(tree, proto_ax4000, tvb, 0, -1, ENC_NA);

  ax4000_tree = proto_item_add_subtree(ti, ett_ax4000);

  proto_tree_add_item_ret_uint(ax4000_tree, hf_ax4000_port, tvb, 0, 1, ENC_LITTLE_ENDIAN, &ax_port);

  proto_tree_add_item_ret_uint(ax4000_tree, hf_ax4000_chassis, tvb, 1, 1, ENC_LITTLE_ENDIAN, &ax_chassis);

  proto_tree_add_item(ax4000_tree, hf_ax4000_fill, tvb, 2, 1, ENC_BIG_ENDIAN);

  proto_tree_add_item_ret_uint(ax4000_tree, hf_ax4000_index, tvb, 2, 2, ENC_BIG_ENDIAN, &ax_index);

  proto_tree_add_item_ret_uint(ax4000_tree, hf_ax4000_timestamp, tvb, 6, 4, ENC_LITTLE_ENDIAN, &ax_timestamp);

  proto_tree_add_item_ret_uint(ax4000_tree, hf_ax4000_seq, tvb, 10, 4, ENC_LITTLE_ENDIAN, &ax_seq);

  proto_tree_add_item(ax4000_tree, hf_ax4000_crc, tvb, 14, 2, ENC_LITTLE_ENDIAN);

  col_append_fstr(pinfo->cinfo, COL_INFO,

      "Chss:%u Prt:%u Idx:%u Seq:0x%08x TS:%.6f[msec]",

      ax_chassis, ax_port, ax_index, ax_seq, ax_timestamp*1e-5);

  return tvb_captured_length(tvb);

}

/* Register the protocol with Wireshark */

/* this format is require because a script is used to build the C function

   that calls all the protocol registration.

*/

void

proto_register_ax4000(void)

{

  static hf_register_info hf[] = {

    { &hf_ax4000_port,

      { "Port Number", "ax4000.port",

        FT_UINT8, BASE_DEC, NULL, 0x0,

        NULL, HFILL }

    },

    { &hf_ax4000_chassis,

      { "Chassis Number", "ax4000.chassis",

        FT_UINT8, BASE_DEC, NULL, 0x0,

        NULL, HFILL }

    },

    { &hf_ax4000_fill,

      { "Fill Type", "ax4000.fill",

        FT_UINT8, BASE_DEC, NULL, 0xc0,

        NULL, HFILL }

    },

    { &hf_ax4000_index,

      { "Index", "ax4000.index",

        FT_UINT16, BASE_DEC, NULL, 0x0FFF,

        NULL, HFILL }

    },

    { &hf_ax4000_timestamp,

      { "Timestamp", "ax4000.timestamp",

        FT_UINT32, BASE_HEX, NULL, 0x0,

        NULL, HFILL }

    },

    { &hf_ax4000_seq,

      { "Sequence Number", "ax4000.seq",

        FT_UINT32, BASE_HEX, NULL, 0x0,

        NULL, HFILL }

    },

    { &hf_ax4000_crc,

      { "CRC (unchecked)", "ax4000.crc",

        FT_UINT16, BASE_HEX, NULL, 0x0,

        NULL, HFILL }

    }

  };

  /* Setup protocol subtree array */

  static int *ett[] = {

    &ett_ax4000

  };

  /* Register the protocol name and description */

  proto_ax4000 = proto_register_protocol("AX/4000 Test Block",

                 "AX4000", "ax4000");

  /* Required function calls to register the header fields and subtrees used */

  proto_register_field_array(proto_ax4000, hf, array_length(hf));

  proto_register_subtree_array(ett, array_length(ett));

  ax4000_handle = register_dissector("ax4000", dissect_ax4000, proto_ax4000);

}

#define AX4000_TCP_PORT 3357 /* assigned by IANA */

#define AX4000_UDP_PORT 3357 /* assigned by IANA */

void

proto_reg_handoff_ax4000(void)

{

#define IP_PROTO_AX4000         173     /* AX/4000 Testblock - non IANA */

  dissector_add_uint("ip.proto", IP_PROTO_AX4000, ax4000_handle);

  dissector_add_uint_with_preference("tcp.port", AX4000_TCP_PORT, ax4000_handle);

  dissector_add_uint_with_preference("udp.port", AX4000_UDP_PORT, ax4000_handle);

}

/*

 * Editor modelines  -  https://www.wireshark.org/tools/modelines.html

 *

 * Local variables:

 * c-basic-offset: 8

 * tab-width: 8

 * indent-tabs-mode: t

 * End:

 *

 * vi: set shiftwidth=8 tabstop=8 noexpandtab:

 * :indentSize=8:tabSize=8:noTabs=false:

 */