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packet-ans.c

/* packet-ans.c
 * Routines for Intel ANS probe dissection
 *
 * $Id: packet-ans.c 18196 2006-05-21 04:49:01Z sahlberg $
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 2003 Gerald Combs
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 * 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     
 *
 */

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <glib.h>

#include <epan/packet.h>
#include <epan/proto.h>
#include <etypes.h>

/* Initialize the protocol and registered fields */
static int proto_ans        = -1;

static int hf_ans_app_id    = -1;
static int hf_ans_rev_id    = -1;
static int hf_ans_seq_num   = -1;
static int hf_ans_sender_id = -1;
static int hf_ans_team_id   = -1;

/* Initialize the subtree pointers */
static gint ett_ans = -1;

/* Code to actually dissect the packets */
static void
dissect_ans(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
      proto_item  *ti;
      proto_tree  *ans_tree = NULL;
      guint16      sender_id;
      guint32      seq_num;
      guint8       team_id[6];

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

      if (check_col(pinfo->cinfo, COL_INFO)) {
            col_clear(pinfo->cinfo, COL_INFO);
            
            seq_num = tvb_get_ntohl(tvb, 4);
            sender_id = tvb_get_ntohs(tvb, 8);
            tvb_memcpy(tvb, team_id, 10, 6);

            col_append_fstr(pinfo->cinfo, COL_INFO, "Sequence: %u, Sender ID %u, Team ID %s",
                  seq_num, sender_id, ether_to_str(team_id));
      }

      if (tree) {
            ti = proto_tree_add_item(tree, proto_ans, tvb, 0, -1, FALSE);
            ans_tree = proto_item_add_subtree(ti, ett_ans);

            proto_tree_add_item(ans_tree, hf_ans_app_id, tvb, 0, 2, FALSE);
            proto_tree_add_item(ans_tree, hf_ans_rev_id, tvb, 2, 2, FALSE);
            proto_tree_add_item(ans_tree, hf_ans_seq_num, tvb, 4, 4, FALSE);
            proto_tree_add_item(ans_tree, hf_ans_sender_id, tvb, 8, 2, FALSE);
            proto_tree_add_item(ans_tree, hf_ans_team_id, tvb, 10, 6, FALSE);
      }
}


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_HEX, NULL, 0,
                        "Intel ANS Team ID", HFILL }
            },
      };

      static gint *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));
}


void
proto_reg_handoff_ans(void)
{
      dissector_handle_t ans_handle;

      ans_handle = create_dissector_handle(dissect_ans, proto_ans);
      dissector_add("ethertype", ETHERTYPE_INTEL_ANS, ans_handle);
}

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