/* packet-ans.c

 * Routines for Intel ANS probe dissection

 *

 * Wireshark - Network traffic analyzer

 * By Gerald Combs <gerald@wireshark.org>

 * Copyright 2003 Gerald Combs

 *

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

 *

 * The following information was graciously provided by Intel:

 * Offset    Size (bytes)    Contents

 * 0         6               Destination Broadcast probes: {FF,FF,FF,FF,FF,FF}

 *                           Multicast probes: {01,AA,00,00,00,00}

 * 6         6               Source Matches the CurrentMACAddress of the

 *                           adapter sending the probe.

 * 8         2               Type Network order is 0x886D, Intel's reserved

 *                           packet type.

 * 10 (0)    2               ApplicationID Network order is 0x0001, identifies

 *                           it as fault tolerance probe.

 * 12 (2)    2               RevID Network order, identifies the revision id

 *                           of Teaming software.

 * 16 (4)    4               ProbeSequenceNumber Ascending sequence number

 *                           that identifies the current probing cycle.

 * 20 (8)    2               SenderID Unique ID within a team identifying

 *                           the member that originally sent the probe.

 * 22 (10)   6               TeamID Unique ID identifying the team in charge

 *                           of this probe.

 * 28        Padding         Reserved

 *

 */

#include "config.h"

#include <epan/packet.h>

#include <epan/to_str.h>

#include <epan/etypes.h>

void proto_register_ans(void);

void proto_reg_handoff_ans(void);

static dissector_handle_t ans_handle;

/* Initialize the protocol and registered fields */

static int proto_ans;

static int hf_ans_app_id;

static int hf_ans_rev_id;

static int hf_ans_seq_num;

static int hf_ans_sender_id;

static int hf_ans_team_id;

/* Initialize the subtree pointers */

static int ett_ans;

/* Code to actually dissect the packets */

static int

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

{

  proto_item  *ti;

  proto_tree  *ans_tree;

  uint16_t     sender_id;

  uint32_t     seq_num;

  col_set_str(pinfo->cinfo, COL_PROTOCOL, "Intel ANS probe");

  seq_num = tvb_get_ntohl(tvb, 4);

  sender_id = tvb_get_ntohs(tvb, 8);

  col_add_fstr(pinfo->cinfo, COL_INFO, "Sequence: %u, Sender ID %u, Team ID %s",

    seq_num, sender_id, tvb_ether_to_str(pinfo->pool, tvb, 10));

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

  ans_tree = proto_item_add_subtree(ti, ett_ans);

  proto_tree_add_item(ans_tree, hf_ans_app_id, tvb, 0, 2, ENC_BIG_ENDIAN);

  proto_tree_add_item(ans_tree, hf_ans_rev_id, tvb, 2, 2, ENC_BIG_ENDIAN);

  proto_tree_add_item(ans_tree, hf_ans_seq_num, tvb, 4, 4, ENC_BIG_ENDIAN);

  proto_tree_add_item(ans_tree, hf_ans_sender_id, tvb, 8, 2, ENC_BIG_ENDIAN);

  proto_tree_add_item(ans_tree, hf_ans_team_id, tvb, 10, 6, ENC_NA);

  return tvb_captured_length(tvb);

}

void

proto_register_ans(void)

{

  static hf_register_info hf[] = {

    { &hf_ans_app_id,

      { "Application ID", "ans.app_id",

        FT_UINT16, BASE_HEX, NULL, 0,

        "Intel ANS Application ID", HFILL }

    },

    { &hf_ans_rev_id,

      { "Revision ID", "ans.rev_id",

        FT_UINT16, BASE_HEX, NULL, 0,

        "Intel ANS Revision ID", HFILL }

    },

    { &hf_ans_seq_num,

      { "Sequence Number", "ans.seq_num",

        FT_UINT32, BASE_DEC, NULL, 0,

        "Intel ANS Sequence Number", HFILL }

    },

    { &hf_ans_sender_id,

      { "Sender ID", "ans.sender_id",

        FT_UINT16, BASE_DEC, NULL, 0,

        "Intel ANS Sender ID", HFILL }

    },

    { &hf_ans_team_id,

      { "Team ID", "ans.team_id",

        FT_ETHER, BASE_NONE, NULL, 0,

        "Intel ANS Team ID", HFILL }

    },

  };

  static int *ett[] = {

    &ett_ans,

  };

  proto_ans = proto_register_protocol("Intel ANS probe", "ANS", "ans");

  proto_register_field_array(proto_ans, hf, array_length(hf));

  proto_register_subtree_array(ett, array_length(ett));

  ans_handle = register_dissector("ans", dissect_ans, proto_ans);

}

void

proto_reg_handoff_ans(void)

{

  dissector_add_uint("ethertype", ETHERTYPE_INTEL_ANS, ans_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:

 */