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packet-batadv.c

/* packet-batadv.c
 * Routines for B.A.T.M.A.N. Advanced dissection
 * Copyright 2008-2010  Sven Eckelmann <sven.eckelmann@gmx.de>
 *
 * $Id: packet-batadv.c 33075 2010-06-03 18:56:39Z wmeier $
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

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

#include <epan/packet.h>
#include <epan/prefs.h>
#include <epan/tap.h>
#include <epan/addr_resolv.h>

/* Start content from packet-batadv.h */
#define ETH_P_BATMAN  0x4305

#define BATADV_PACKET    0x01
#define BATADV_ICMP      0x02
#define BATADV_UNICAST   0x03
#define BATADV_BCAST     0x04
#define BATADV_VIS       0x05

#define ECHO_REPLY 0
#define DESTINATION_UNREACHABLE 3
#define ECHO_REQUEST 8
#define TTL_EXCEEDED 11

struct batman_packet_v5 {
      guint8  packet_type;
      guint8  version;  /* batman version field */
      guint8  flags;    /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */
      guint8  ttl;
      guint8  gwflags;  /* flags related to gateway functions: gateway class */
      guint8  tq;
      guint16 seqno;
      address orig;
      address prev_sender;
      guint8  num_hna;
      guint8  pad;
};
#define BATMAN_PACKET_V5_SIZE 22

struct batman_packet_v7 {
      guint8  packet_type;
      guint8  version;  /* batman version field */
      guint8  flags;    /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */
      guint8  tq;
      guint16 seqno;
      address orig;
      address prev_sender;
      guint8  ttl;
      guint8  num_hna;
};
#define BATMAN_PACKET_V7_SIZE 20

struct batman_packet_v9 {
      guint8  packet_type;
      guint8  version;  /* batman version field */
      guint8  flags;    /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */
      guint8  tq;
      guint16 seqno;
      address orig;
      address prev_sender;
      guint8  ttl;
      guint8  num_hna;
      guint8  gwflags;
      guint8  pad;
};
#define BATMAN_PACKET_V9_SIZE 22

struct batman_packet_v10 {
      guint8  packet_type;
      guint8  version;  /* batman version field */
      guint8  flags;    /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */
      guint8  tq;
      guint32 seqno;
      address orig;
      address prev_sender;
      guint8  ttl;
      guint8  num_hna;
      guint8  gwflags;
      guint8  pad;
};
#define BATMAN_PACKET_V10_SIZE 24

struct icmp_packet_v6 {
      guint8  packet_type;
      guint8  version;  /* batman version field */
      guint8  msg_type;   /* 0 = ECHO REPLY, 3 = DESTINATION_UNREACHABLE, 8 = ECHO_REQUEST, 11 = TTL exceeded */
      address dst;
      address orig;
      guint8  ttl;
      guint8  uid;
      guint16 seqno;
};
#define ICMP_PACKET_V6_SIZE 19

struct icmp_packet_v7 {
      guint8  packet_type;
      guint8  version;  /* batman version field */
      guint8  msg_type;   /* 0 = ECHO REPLY, 3 = DESTINATION_UNREACHABLE, 8 = ECHO_REQUEST, 11 = TTL exceeded */
      guint8  ttl;
      address dst;
      address orig;
      guint16 seqno;
      guint8  uid;
};
#define ICMP_PACKET_V7_SIZE 18

struct unicast_packet_v6 {
      guint8  packet_type;
      guint8  version;
      address dest;
      guint8  ttl;
};
#define UNICAST_PACKET_V6_SIZE 9

struct bcast_packet_v6 {
      guint8  packet_type;
      guint8  version;  /* batman version field */
      address orig;
      guint16 seqno;
};
#define BCAST_PACKET_V6_SIZE 10

struct bcast_packet_v10 {
      guint8  packet_type;
      guint8  version;  /* batman version field */
      address orig;
      guint8  ttl;
      guint32 seqno;
};
#define BCAST_PACKET_V10_SIZE 13

struct vis_packet_v6 {
      guint8  packet_type;
      guint8  version;      /* batman version field */
      guint8  vis_type;     /* which type of vis-participant sent this? */
      guint8  seqno;        /* sequence number */
      guint8  entries;      /* number of entries behind this struct */
      guint8  ttl;          /* TTL */
      address vis_orig;     /* originator that informs about its neighbours */
      address target_orig;  /* who should receive this packet */
      address sender_orig;  /* who sent or rebroadcasted this packet */
};
#define VIS_PACKET_V6_SIZE 24

struct vis_packet_v10 {
      guint8  packet_type;
      guint8  version;      /* batman version field */
      guint8  vis_type;     /* which type of vis-participant sent this? */
      guint8  entries;      /* number of entries behind this struct */
      guint32 seqno;        /* sequence number */
      guint8  ttl;          /* TTL */
      address vis_orig;     /* originator that informs about its neighbours */
      address target_orig;  /* who should receive this packet */
      address sender_orig;  /* who sent or rebroadcasted this packet */
};
#define VIS_PACKET_V10_SIZE 27

#define VIS_ENTRY_V6_SIZE 7
#define VIS_ENTRY_V8_SIZE 13

#define VIS_TYPE_SERVER_SYNC  0
#define VIS_TYPE_CLIENT_UPDATE  1
/* End content from packet-batadv.h */

/* trees */
static gint ett_batadv_batman = -1;
static gint ett_batadv_batman_flags = -1;
static gint ett_batadv_batman_gwflags = -1;
static gint ett_batadv_batman_hna = -1;
static gint ett_batadv_bcast = -1;
static gint ett_batadv_icmp = -1;
static gint ett_batadv_unicast = -1;
static gint ett_batadv_vis = -1;
static gint ett_batadv_vis_entry = -1;

/* hfs */
static int hf_batadv_packet_type = -1;

static int hf_batadv_batman_version = -1;
static int hf_batadv_batman_flags = -1;
static int hf_batadv_batman_ttl = -1;
static int hf_batadv_batman_gwflags = -1;
static int hf_batadv_batman_tq = -1;
static int hf_batadv_batman_seqno = -1;
static int hf_batadv_batman_seqno32 = -1;
static int hf_batadv_batman_orig = -1;
static int hf_batadv_batman_prev_sender = -1;
static int hf_batadv_batman_num_hna = -1;
static int hf_batadv_batman_pad = -1;
static int hf_batadv_batman_hna = -1;

static int hf_batadv_bcast_version = -1;
static int hf_batadv_bcast_pad = -1;
static int hf_batadv_bcast_orig = -1;
static int hf_batadv_bcast_seqno = -1;
static int hf_batadv_bcast_seqno32 = -1;
static int hf_batadv_bcast_ttl = -1;

static int hf_batadv_icmp_version = -1;
static int hf_batadv_icmp_msg_type = -1;
static int hf_batadv_icmp_dst = -1;
static int hf_batadv_icmp_orig = -1;
static int hf_batadv_icmp_ttl = -1;
static int hf_batadv_icmp_uid = -1;
static int hf_batadv_icmp_seqno = -1;

static int hf_batadv_unicast_version = -1;
static int hf_batadv_unicast_dst = -1;
static int hf_batadv_unicast_ttl = -1;

static int hf_batadv_vis_version = -1;
static int hf_batadv_vis_type = -1;
static int hf_batadv_vis_seqno = -1;
static int hf_batadv_vis_seqno32 = -1;
static int hf_batadv_vis_entries = -1;
static int hf_batadv_vis_ttl = -1;
static int hf_batadv_vis_vis_orig = -1;
static int hf_batadv_vis_target_orig = -1;
static int hf_batadv_vis_sender_orig = -1;
static int hf_batadv_vis_entry_src = -1;
static int hf_batadv_vis_entry_dst = -1;
static int hf_batadv_vis_entry_quality = -1;

/* flags */
static int hf_batadv_batman_flags_directlink = -1;
static int hf_batadv_batman_flags_vis_server = -1;
static int hf_batadv_batman_flags_primaries_first_hop = -1;

static const value_string icmp_packettypenames[] = {
      { ECHO_REPLY, "ECHO_REPLY" },
      { DESTINATION_UNREACHABLE, "DESTINATION UNREACHABLE" },
      { ECHO_REQUEST, "ECHO_REQUEST" },
      { TTL_EXCEEDED, "TTL exceeded" },
      { 0, NULL }
};

static const value_string vis_packettypenames[] = {
      { VIS_TYPE_SERVER_SYNC, "SERVER_SYNC" },
      { VIS_TYPE_CLIENT_UPDATE, "CLIENT_UPDATE" },
      { 0, NULL }
};


/* forward declaration */
void proto_reg_handoff_batadv(void);

static dissector_handle_t batman_handle;

/* supported packet dissectors */
static void dissect_batadv_batman(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static int dissect_batadv_batman_v5(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree);
static int dissect_batadv_batman_v7(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree);
static int dissect_batadv_batman_v9(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree);
static int dissect_batadv_batman_v10(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree);

static void dissect_batadv_bcast(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static void dissect_batadv_bcast_v6(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static void dissect_batadv_bcast_v10(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);

static void dissect_batadv_icmp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static void dissect_batadv_icmp_v6(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static void dissect_batadv_icmp_v7(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);

static void dissect_batadv_unicast(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static void dissect_batadv_unicast_v6(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);

static void dissect_batadv_vis(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static void dissect_batadv_vis_v6(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static void dissect_batadv_vis_v10(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);

static void dissect_batadv_hna(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static void dissect_vis_entry_v6(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
static void dissect_vis_entry_v8(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);

/* other dissectors */
static dissector_handle_t data_handle;
static dissector_handle_t eth_handle;

static int proto_batadv_plugin = -1;

/* tap */
static int batadv_tap = -1;
static int batadv_follow_tap = -1;

static unsigned int batadv_ethertype = ETH_P_BATMAN;

static void dissect_batman_plugin(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
      guint8 type;

      col_clear(pinfo->cinfo, COL_INFO);

      type = tvb_get_guint8(tvb, 0);

      switch (type) {
      case BATADV_PACKET:
            dissect_batadv_batman(tvb, pinfo, tree);
            break;
      case BATADV_ICMP:
            dissect_batadv_icmp(tvb, pinfo, tree);
            break;
      case BATADV_UNICAST:
            dissect_batadv_unicast(tvb, pinfo, tree);
            break;
      case BATADV_BCAST:
            dissect_batadv_bcast(tvb, pinfo, tree);
            break;
      case BATADV_VIS:
            dissect_batadv_vis(tvb, pinfo, tree);
            break;
      default:
            /* dunno */
      {
            tvbuff_t *next_tvb;
            guint length_remaining;

            col_set_str(pinfo->cinfo, COL_PROTOCOL, "BATADV_???");

            length_remaining = tvb_length_remaining(tvb, 1);
            next_tvb = tvb_new_subset(tvb, 0, length_remaining, -1);
            call_dissector(data_handle, next_tvb, pinfo, tree);
            break;
      }
      }
}

static void dissect_batadv_batman(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
      guint8 version;
      int offset = 0;

      /* set protocol name */
      col_set_str(pinfo->cinfo, COL_PROTOCOL, "BATADV_BATMAN");

      version = tvb_get_guint8(tvb, 1);
      switch (version) {
      case 5:
      case 6:
            while (offset != -1 && tvb_length_remaining(tvb, offset) >= BATMAN_PACKET_V5_SIZE) {
                  offset = dissect_batadv_batman_v5(tvb, offset, pinfo, tree);
            }
            break;
      case 7:
      case 8:
            while (offset != -1 && tvb_length_remaining(tvb, offset) >= BATMAN_PACKET_V7_SIZE) {
                  offset = dissect_batadv_batman_v7(tvb, offset, pinfo, tree);
            }
            break;
      case 9:
            while (offset != -1 && tvb_length_remaining(tvb, offset) >= BATMAN_PACKET_V9_SIZE) {
                  offset = dissect_batadv_batman_v9(tvb, offset, pinfo, tree);
            }
            break;
      case 10:
            while (offset != -1 && tvb_length_remaining(tvb, offset) >= BATMAN_PACKET_V10_SIZE) {
                  offset = dissect_batadv_batman_v10(tvb, offset, pinfo, tree);
            }
            break;
      default:
            col_add_fstr(pinfo->cinfo, COL_INFO, "Unsupported Version %d", version);
            call_dissector(data_handle, tvb, pinfo, tree);
            break;
      }
}

static void dissect_batadv_gwflags(tvbuff_t *tvb, guint8 gwflags, int offset, proto_item *tgw)
{
      proto_tree *gwflags_tree;
      guint8 s = (gwflags & 0x80) >> 7;
      guint8 downbits = (gwflags & 0x78) >> 3;
      guint8 upbits = (gwflags & 0x07);
      guint down, up;

      if (gwflags == 0) {
            down = 0;
            up = 0;
      } else {
            down = 32 * (s + 2) * (1 << downbits);
            up = ((upbits + 1) * down) / 8;
      }

      gwflags_tree =  proto_item_add_subtree(tgw, ett_batadv_batman_gwflags);
      proto_tree_add_text(gwflags_tree, tvb, offset, 1, "Download Speed: %dkbit", down);
      proto_tree_add_text(gwflags_tree, tvb, offset, 1, "Upload Speed: %dkbit", up);

}

static int dissect_batadv_batman_v5(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree)
{
      proto_item *tf, *tgw;
      proto_tree *batadv_batman_tree = NULL, *flag_tree;
      guint8 type;
      struct batman_packet_v5 *batman_packeth;
      const guint8  *prev_sender_addr, *orig_addr;
      gint i;

      tvbuff_t *next_tvb;

      batman_packeth = ep_alloc(sizeof(struct batman_packet_v5));

      type = tvb_get_guint8(tvb, offset+0);
      batman_packeth->version = tvb_get_guint8(tvb, offset+1);

      /* don't interpret padding as B.A.T.M.A.N. advanced packet */
      if (batman_packeth->version == 0 || type != BATADV_PACKET) {
            return -1;
      }

      batman_packeth->flags = tvb_get_guint8(tvb, offset+2);
      batman_packeth->ttl = tvb_get_guint8(tvb, offset+3);
      batman_packeth->gwflags = tvb_get_guint8(tvb, offset+4);
      batman_packeth->tq = tvb_get_guint8(tvb, offset+5);
      batman_packeth->seqno = tvb_get_ntohs(tvb, offset+6);
      orig_addr = tvb_get_ptr(tvb, offset+8, 6);
      SET_ADDRESS(&batman_packeth->orig, AT_ETHER, 6, orig_addr);
      prev_sender_addr = tvb_get_ptr(tvb, offset+14, 6);
      SET_ADDRESS(&batman_packeth->prev_sender, AT_ETHER, 6, prev_sender_addr);
      batman_packeth->num_hna = tvb_get_guint8(tvb, offset+20);
      batman_packeth->pad = tvb_get_guint8(tvb, offset+21);

      /* Set info column */
      col_add_fstr(pinfo->cinfo, COL_INFO, "Seq=%u", batman_packeth->seqno);

      /* Set tree info */
      if (tree) {
            proto_item *ti;

            if (PTREE_DATA(tree)->visible) {
                  ti = proto_tree_add_protocol_format(tree, proto_batadv_plugin, tvb, offset, BATMAN_PACKET_V5_SIZE,
                                                      "B.A.T.M.A.N., Orig: %s (%s)",
                                                      get_ether_name(orig_addr), ether_to_str(orig_addr));
            } else {
                  ti = proto_tree_add_item(tree, proto_batadv_plugin, tvb, offset, BATMAN_PACKET_V5_SIZE, FALSE);
            }
            batadv_batman_tree = proto_item_add_subtree(ti, ett_batadv_batman);
      }

      /* items */
      proto_tree_add_uint_format(batadv_batman_tree, hf_batadv_packet_type, tvb, offset, 1, BATADV_PACKET,
                              "Packet Type: %s (%u)", "BATADV_PACKET", BATADV_PACKET);
      offset += 1;

      proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_version, tvb, offset, 1, FALSE);
      offset += 1;

      tf = proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_flags, tvb, offset, 1, FALSE);
      /* <flags> */
      flag_tree =  proto_item_add_subtree(tf, ett_batadv_batman_flags);
      proto_tree_add_boolean(flag_tree, hf_batadv_batman_flags_directlink, tvb, offset, 1, batman_packeth->flags);
      proto_tree_add_boolean(flag_tree, hf_batadv_batman_flags_vis_server, tvb, offset, 1, batman_packeth->flags);
      /* </flags> */
      offset += 1;

      proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_ttl, tvb, offset, 1, FALSE);
      offset += 1;

      tgw = proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_gwflags, tvb, offset, 1, FALSE);
      dissect_batadv_gwflags(tvb, batman_packeth->gwflags, offset, tgw);
      offset += 1;

      proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_tq, tvb, offset, 1, FALSE);
      offset += 1;

      proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_seqno, tvb, offset, 2, FALSE);
      offset += 2;

      proto_tree_add_ether(batadv_batman_tree, hf_batadv_batman_orig, tvb, offset, 6, orig_addr);
      offset += 6;

      proto_tree_add_ether(batadv_batman_tree, hf_batadv_batman_prev_sender, tvb, offset, 6, prev_sender_addr);
      offset += 6;

      proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_num_hna, tvb, offset, 1, FALSE);
      offset += 1;

      /* Hidden: proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_pad, tvb, offset, 1, FALSE); */
      offset += 1;

      SET_ADDRESS(&pinfo->dl_src, AT_ETHER, 6, orig_addr);
      SET_ADDRESS(&pinfo->src, AT_ETHER, 6, orig_addr);

      tap_queue_packet(batadv_tap, pinfo, batman_packeth);

      for (i = 0; i < batman_packeth->num_hna; i++) {
            next_tvb = tvb_new_subset(tvb, offset, 6, 6);

            if (have_tap_listener(batadv_follow_tap)) {
                  tap_queue_packet(batadv_follow_tap, pinfo, next_tvb);
            }

            dissect_batadv_hna(next_tvb, pinfo, batadv_batman_tree);
            offset += 6;
      }

      return offset;
}

static int dissect_batadv_batman_v7(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree)
{
      proto_item *tf;
      proto_tree *batadv_batman_tree = NULL, *flag_tree;
      guint8 type;
      struct batman_packet_v7 *batman_packeth;
      const guint8  *prev_sender_addr, *orig_addr;
      gint i;

      tvbuff_t *next_tvb;

      batman_packeth = ep_alloc(sizeof(struct batman_packet_v7));

      type = tvb_get_guint8(tvb, offset+0);
      batman_packeth->version = tvb_get_guint8(tvb, offset+1);

      /* don't interpret padding as B.A.T.M.A.N. advanced packet */
      if (batman_packeth->version == 0 || type != BATADV_PACKET) {
            return -1;
      }

      batman_packeth->flags = tvb_get_guint8(tvb, offset+2);
      batman_packeth->tq = tvb_get_guint8(tvb, offset+3);
      batman_packeth->seqno = tvb_get_ntohs(tvb, offset+4);
      orig_addr = tvb_get_ptr(tvb, offset+6, 6);
      SET_ADDRESS(&batman_packeth->orig, AT_ETHER, 6, orig_addr);
      prev_sender_addr = tvb_get_ptr(tvb, offset+12, 6);
      SET_ADDRESS(&batman_packeth->prev_sender, AT_ETHER, 6, prev_sender_addr);
      batman_packeth->ttl = tvb_get_guint8(tvb, offset+18);
      batman_packeth->num_hna = tvb_get_guint8(tvb, offset+19);

      /* Set info column */
      col_add_fstr(pinfo->cinfo, COL_INFO, "Seq=%u", batman_packeth->seqno);

      /* Set tree info */
      if (tree) {
            proto_item *ti;

            if (PTREE_DATA(tree)->visible) {
                  ti = proto_tree_add_protocol_format(tree, proto_batadv_plugin, tvb, offset, BATMAN_PACKET_V7_SIZE,
                                                      "B.A.T.M.A.N., Orig: %s (%s)",
                                                      get_ether_name(orig_addr), ether_to_str(orig_addr));
            } else {
                  ti = proto_tree_add_item(tree, proto_batadv_plugin, tvb, offset, BATMAN_PACKET_V7_SIZE, FALSE);
            }
            batadv_batman_tree = proto_item_add_subtree(ti, ett_batadv_batman);
      }

      /* items */
      proto_tree_add_uint_format(batadv_batman_tree, hf_batadv_packet_type, tvb, offset, 1, BATADV_PACKET,
                              "Packet Type: %s (%u)", "BATADV_PACKET", BATADV_PACKET);
      offset += 1;

      proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_version, tvb, offset, 1, FALSE);
      offset += 1;

      tf = proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_flags, tvb, offset, 1, FALSE);
      /* <flags> */
      flag_tree =  proto_item_add_subtree(tf, ett_batadv_batman_flags);
      proto_tree_add_boolean(flag_tree, hf_batadv_batman_flags_directlink, tvb, offset, 1, batman_packeth->flags);
      proto_tree_add_boolean(flag_tree, hf_batadv_batman_flags_vis_server, tvb, offset, 1, batman_packeth->flags);
      /* </flags> */
      offset += 1;

      proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_tq, tvb, offset, 1, FALSE);
      offset += 1;

      proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_seqno, tvb, offset, 2, FALSE);
      offset += 2;

      proto_tree_add_ether(batadv_batman_tree, hf_batadv_batman_orig, tvb, offset, 6, orig_addr);
      offset += 6;

      proto_tree_add_ether(batadv_batman_tree, hf_batadv_batman_prev_sender, tvb, offset, 6, prev_sender_addr);
      offset += 6;

      proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_ttl, tvb, offset, 1, FALSE);
      offset += 1;

      proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_num_hna, tvb, offset, 1, FALSE);
      offset += 1;

      SET_ADDRESS(&pinfo->dl_src, AT_ETHER, 6, orig_addr);
      SET_ADDRESS(&pinfo->src, AT_ETHER, 6, orig_addr);

      tap_queue_packet(batadv_tap, pinfo, batman_packeth);

      for (i = 0; i < batman_packeth->num_hna; i++) {
            next_tvb = tvb_new_subset(tvb, offset, 6, 6);

            if (have_tap_listener(batadv_follow_tap)) {
                  tap_queue_packet(batadv_follow_tap, pinfo, next_tvb);
            }

            dissect_batadv_hna(next_tvb, pinfo, batadv_batman_tree);
            offset += 6;
      }

      return offset;
}

static int dissect_batadv_batman_v9(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree)
{
      proto_item *tf, *tgw;
      proto_tree *batadv_batman_tree = NULL, *flag_tree;
      guint8 type;
      struct batman_packet_v9 *batman_packeth;
      const guint8  *prev_sender_addr, *orig_addr;
      gint i;

      tvbuff_t *next_tvb;

      batman_packeth = ep_alloc(sizeof(struct batman_packet_v9));

      type = tvb_get_guint8(tvb, offset+0);
      batman_packeth->version = tvb_get_guint8(tvb, offset+1);

      /* don't interpret padding as B.A.T.M.A.N. advanced packet */
      if (batman_packeth->version == 0 || type != BATADV_PACKET) {
            return -1;
      }

      batman_packeth->flags = tvb_get_guint8(tvb, offset+2);
      batman_packeth->tq = tvb_get_guint8(tvb, offset+3);
      batman_packeth->seqno = tvb_get_ntohs(tvb, offset+4);
      orig_addr = tvb_get_ptr(tvb, offset+6, 6);
      SET_ADDRESS(&batman_packeth->orig, AT_ETHER, 6, orig_addr);
      prev_sender_addr = tvb_get_ptr(tvb, offset+12, 6);
      SET_ADDRESS(&batman_packeth->prev_sender, AT_ETHER, 6, prev_sender_addr);
      batman_packeth->ttl = tvb_get_guint8(tvb, offset+18);
      batman_packeth->num_hna = tvb_get_guint8(tvb, offset+19);
      batman_packeth->gwflags = tvb_get_guint8(tvb, offset+20);

      /* Set info column */
      col_add_fstr(pinfo->cinfo, COL_INFO, "Seq=%u", batman_packeth->seqno);

      /* Set tree info */
      if (tree) {
            proto_item *ti;

            if (PTREE_DATA(tree)->visible) {
                  ti = proto_tree_add_protocol_format(tree, proto_batadv_plugin, tvb, offset, BATMAN_PACKET_V9_SIZE,
                                                      "B.A.T.M.A.N., Orig: %s (%s)",
                                                      get_ether_name(orig_addr), ether_to_str(orig_addr));
            } else {
                  ti = proto_tree_add_item(tree, proto_batadv_plugin, tvb, offset, BATMAN_PACKET_V9_SIZE, FALSE);
            }
            batadv_batman_tree = proto_item_add_subtree(ti, ett_batadv_batman);
      }

      /* items */
      proto_tree_add_uint_format(batadv_batman_tree, hf_batadv_packet_type, tvb, offset, 1, BATADV_PACKET,
                              "Packet Type: %s (%u)", "BATADV_PACKET", BATADV_PACKET);
      offset += 1;

      proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_version, tvb, offset, 1, FALSE);
      offset += 1;

      tf = proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_flags, tvb, offset, 1, FALSE);
      /* <flags> */
      flag_tree =  proto_item_add_subtree(tf, ett_batadv_batman_flags);
      proto_tree_add_boolean(flag_tree, hf_batadv_batman_flags_directlink, tvb, offset, 1, batman_packeth->flags);
      proto_tree_add_boolean(flag_tree, hf_batadv_batman_flags_vis_server, tvb, offset, 1, batman_packeth->flags);
      proto_tree_add_boolean(flag_tree, hf_batadv_batman_flags_primaries_first_hop, tvb, offset, 1, batman_packeth->flags);
      /* </flags> */
      offset += 1;

      proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_tq, tvb, offset, 1, FALSE);
      offset += 1;

      proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_seqno, tvb, offset, 2, FALSE);
      offset += 2;

      proto_tree_add_ether(batadv_batman_tree, hf_batadv_batman_orig, tvb, offset, 6, orig_addr);
      offset += 6;

      proto_tree_add_ether(batadv_batman_tree, hf_batadv_batman_prev_sender, tvb, offset, 6, prev_sender_addr);
      offset += 6;

      proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_ttl, tvb, offset, 1, FALSE);
      offset += 1;

      proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_num_hna, tvb, offset, 1, FALSE);
      offset += 1;

      tgw = proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_gwflags, tvb, offset, 1, FALSE);
      dissect_batadv_gwflags(tvb, batman_packeth->gwflags, offset, tgw);
      offset += 1;

      /* Hidden: proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_pad, tvb, offset, 1, FALSE); */
      offset += 1;

      SET_ADDRESS(&pinfo->dl_src, AT_ETHER, 6, orig_addr);
      SET_ADDRESS(&pinfo->src, AT_ETHER, 6, orig_addr);

      tap_queue_packet(batadv_tap, pinfo, batman_packeth);

      for (i = 0; i < batman_packeth->num_hna; i++) {
            next_tvb = tvb_new_subset(tvb, offset, 6, 6);

            if (have_tap_listener(batadv_follow_tap)) {
                  tap_queue_packet(batadv_follow_tap, pinfo, next_tvb);
            }

            dissect_batadv_hna(next_tvb, pinfo, batadv_batman_tree);
            offset += 6;
      }

      return offset;
}

static int dissect_batadv_batman_v10(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree)
{
      proto_item *tf, *tgw;
      proto_tree *batadv_batman_tree = NULL, *flag_tree;
      guint8 type;
      struct batman_packet_v10 *batman_packeth;
      const guint8  *prev_sender_addr, *orig_addr;
      gint i;

      tvbuff_t *next_tvb;

      batman_packeth = ep_alloc(sizeof(struct batman_packet_v10));

      type = tvb_get_guint8(tvb, offset+0);
      batman_packeth->version = tvb_get_guint8(tvb, offset+1);

      /* don't interpret padding as B.A.T.M.A.N. advanced packet */
      if (batman_packeth->version == 0 || type != BATADV_PACKET) {
            return -1;
      }

      batman_packeth->flags = tvb_get_guint8(tvb, offset+2);
      batman_packeth->tq = tvb_get_guint8(tvb, offset+3);
      batman_packeth->seqno = tvb_get_ntohl(tvb, offset+4);
      orig_addr = tvb_get_ptr(tvb, offset+8, 6);
      SET_ADDRESS(&batman_packeth->orig, AT_ETHER, 6, orig_addr);
      prev_sender_addr = tvb_get_ptr(tvb, offset+14, 6);
      SET_ADDRESS(&batman_packeth->prev_sender, AT_ETHER, 6, prev_sender_addr);
      batman_packeth->ttl = tvb_get_guint8(tvb, offset+20);
      batman_packeth->num_hna = tvb_get_guint8(tvb, offset+21);
      batman_packeth->gwflags = tvb_get_guint8(tvb, offset+22);

      /* Set info column */
      col_add_fstr(pinfo->cinfo, COL_INFO, "Seq=%u", batman_packeth->seqno);

      /* Set tree info */
      if (tree) {
            proto_item *ti;

            if (PTREE_DATA(tree)->visible) {
                  ti = proto_tree_add_protocol_format(tree, proto_batadv_plugin, tvb, offset, BATMAN_PACKET_V10_SIZE,
                                                      "B.A.T.M.A.N., Orig: %s (%s)",
                                                      get_ether_name(orig_addr), ether_to_str(orig_addr));
            } else {
                  ti = proto_tree_add_item(tree, proto_batadv_plugin, tvb, offset, BATMAN_PACKET_V10_SIZE, FALSE);
            }
            batadv_batman_tree = proto_item_add_subtree(ti, ett_batadv_batman);
      }

      /* items */
      proto_tree_add_uint_format(batadv_batman_tree, hf_batadv_packet_type, tvb, offset, 1, BATADV_PACKET,
                              "Packet Type: %s (%u)", "BATADV_PACKET", BATADV_PACKET);
      offset += 1;

      proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_version, tvb, offset, 1, FALSE);
      offset += 1;

      tf = proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_flags, tvb, offset, 1, FALSE);
      /* <flags> */
      flag_tree =  proto_item_add_subtree(tf, ett_batadv_batman_flags);
      proto_tree_add_boolean(flag_tree, hf_batadv_batman_flags_directlink, tvb, offset, 1, batman_packeth->flags);
      proto_tree_add_boolean(flag_tree, hf_batadv_batman_flags_vis_server, tvb, offset, 1, batman_packeth->flags);
      proto_tree_add_boolean(flag_tree, hf_batadv_batman_flags_primaries_first_hop, tvb, offset, 1, batman_packeth->flags);
      /* </flags> */
      offset += 1;

      proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_tq, tvb, offset, 1, FALSE);
      offset += 1;

      proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_seqno32, tvb, offset, 4, FALSE);
      offset += 4;

      proto_tree_add_ether(batadv_batman_tree, hf_batadv_batman_orig, tvb, offset, 6, orig_addr);
      offset += 6;

      proto_tree_add_ether(batadv_batman_tree, hf_batadv_batman_prev_sender, tvb, offset, 6, prev_sender_addr);
      offset += 6;

      proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_ttl, tvb, offset, 1, FALSE);
      offset += 1;

      proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_num_hna, tvb, offset, 1, FALSE);
      offset += 1;

      tgw = proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_gwflags, tvb, offset, 1, FALSE);
      dissect_batadv_gwflags(tvb, batman_packeth->gwflags, offset, tgw);
      offset += 1;

      /* Hidden: proto_tree_add_item(batadv_batman_tree, hf_batadv_batman_pad, tvb, offset, 1, FALSE); */
      offset += 1;

      SET_ADDRESS(&pinfo->dl_src, AT_ETHER, 6, orig_addr);
      SET_ADDRESS(&pinfo->src, AT_ETHER, 6, orig_addr);

      tap_queue_packet(batadv_tap, pinfo, batman_packeth);

      for (i = 0; i < batman_packeth->num_hna; i++) {
            next_tvb = tvb_new_subset(tvb, offset, 6, 6);

            if (have_tap_listener(batadv_follow_tap)) {
                  tap_queue_packet(batadv_follow_tap, pinfo, next_tvb);
            }

            dissect_batadv_hna(next_tvb, pinfo, batadv_batman_tree);
            offset += 6;
      }

      return offset;
}

static void dissect_batadv_hna(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree)
{
      const guint8  *hna;

      hna = tvb_get_ptr(tvb, 0, 6);

      /* Set tree info */
      if (tree) {
            proto_item *ti;
            proto_tree *batadv_batman_hna_tree;

            if (PTREE_DATA(tree)->visible) {
                  ti = proto_tree_add_protocol_format(tree, proto_batadv_plugin, tvb, 0, 6,
                                                      "B.A.T.M.A.N. HNA: %s (%s)",
                                                      get_ether_name(hna), ether_to_str(hna));
            } else {
                  ti = proto_tree_add_item(tree, proto_batadv_plugin, tvb, 0, 6, FALSE);
            }
            batadv_batman_hna_tree = proto_item_add_subtree(ti, ett_batadv_batman_hna);

            proto_tree_add_ether(batadv_batman_hna_tree, hf_batadv_batman_hna, tvb, 0, 6, hna);
      }
}

static void dissect_batadv_bcast(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
      guint8 version;

      /* set protocol name */
      col_set_str(pinfo->cinfo, COL_PROTOCOL, "BATADV_BCAST");

      version = tvb_get_guint8(tvb, 1);
      switch (version) {
      case 6:
      case 7:
      case 8:
      case 9:
            dissect_batadv_bcast_v6(tvb, pinfo, tree);
            break;
      case 10:
            dissect_batadv_bcast_v10(tvb, pinfo, tree);
            break;
      default:
            col_add_fstr(pinfo->cinfo, COL_INFO, "Unsupported Version %d", version);
            call_dissector(data_handle, tvb, pinfo, tree);
            break;
      }
}

static void dissect_batadv_bcast_v6(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
      struct bcast_packet_v6 *bcast_packeth;
      const guint8  *orig_addr;

      tvbuff_t *next_tvb;
      guint length_remaining;
      int offset = 0;

      bcast_packeth = ep_alloc(sizeof(struct bcast_packet_v6));

      bcast_packeth->version = tvb_get_guint8(tvb, 1);
      orig_addr = tvb_get_ptr(tvb, 2, 6);
      SET_ADDRESS(&bcast_packeth->orig, AT_ETHER, 6, orig_addr);
      bcast_packeth->seqno = tvb_get_ntohs(tvb, 8);

      /* Set info column */
      col_add_fstr(pinfo->cinfo, COL_INFO, "Seq=%u", bcast_packeth->seqno);

      /* Set tree info */
      if (tree) {
            proto_item *ti;
            proto_tree *batadv_bcast_tree;

            if (PTREE_DATA(tree)->visible) {
                  ti = proto_tree_add_protocol_format(tree, proto_batadv_plugin, tvb, 0, BCAST_PACKET_V6_SIZE,
                                                      "B.A.T.M.A.N. Bcast, Orig: %s (%s)",
                                                      get_ether_name(orig_addr), ether_to_str(orig_addr));
            } else {
                  ti = proto_tree_add_item(tree, proto_batadv_plugin, tvb, 0, BCAST_PACKET_V6_SIZE, FALSE);
            }
            batadv_bcast_tree = proto_item_add_subtree(ti, ett_batadv_bcast);

            /* items */
            proto_tree_add_uint_format(batadv_bcast_tree, hf_batadv_packet_type, tvb, offset, 1, BATADV_BCAST,
                                       "Packet Type: %s (%u)", "BATADV_BCAST", BATADV_BCAST);
            offset += 1;

            proto_tree_add_item(batadv_bcast_tree, hf_batadv_bcast_version, tvb, offset, 1, FALSE);
            offset += 1;

            proto_tree_add_ether(batadv_bcast_tree, hf_batadv_bcast_orig, tvb, offset, 6, orig_addr);
            offset += 6;

            proto_tree_add_item(batadv_bcast_tree, hf_batadv_bcast_seqno, tvb, offset, 2, FALSE);
            offset += 2;
      }

      /* Calculate offset even when we got no tree */
      offset = BCAST_PACKET_V6_SIZE;

      SET_ADDRESS(&pinfo->dl_src, AT_ETHER, 6, orig_addr);
      SET_ADDRESS(&pinfo->src, AT_ETHER, 6, orig_addr);

      tap_queue_packet(batadv_tap, pinfo, bcast_packeth);

      length_remaining = tvb_length_remaining(tvb, offset);

      if (length_remaining != 0) {
            next_tvb = tvb_new_subset(tvb, offset, length_remaining, -1);

            if (have_tap_listener(batadv_follow_tap)) {
                  tap_queue_packet(batadv_follow_tap, pinfo, next_tvb);
            }

            call_dissector(eth_handle, next_tvb, pinfo, tree);
      }
}

static void dissect_batadv_bcast_v10(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
      struct bcast_packet_v10 *bcast_packeth;
      const guint8  *orig_addr;

      tvbuff_t *next_tvb;
      guint length_remaining;
      int offset = 0;

      bcast_packeth = ep_alloc(sizeof(struct bcast_packet_v10));

      bcast_packeth->version = tvb_get_guint8(tvb, 1);
      orig_addr = tvb_get_ptr(tvb, 2, 6);
      SET_ADDRESS(&bcast_packeth->orig, AT_ETHER, 6, orig_addr);
      bcast_packeth->ttl = tvb_get_guint8(tvb, 8);
      bcast_packeth->seqno = tvb_get_ntohl(tvb, 9);

      /* Set info column */
      col_add_fstr(pinfo->cinfo, COL_INFO, "Seq=%u", bcast_packeth->seqno);

      /* Set tree info */
      if (tree) {
            proto_item *ti;
            proto_tree *batadv_bcast_tree;

            if (PTREE_DATA(tree)->visible) {
                  ti = proto_tree_add_protocol_format(tree, proto_batadv_plugin, tvb, 0, BCAST_PACKET_V10_SIZE,
                                                      "B.A.T.M.A.N. Bcast, Orig: %s (%s)",
                                                      get_ether_name(orig_addr), ether_to_str(orig_addr));
            } else {
                  ti = proto_tree_add_item(tree, proto_batadv_plugin, tvb, 0, BCAST_PACKET_V10_SIZE, FALSE);
            }
            batadv_bcast_tree = proto_item_add_subtree(ti, ett_batadv_bcast);

            /* items */
            proto_tree_add_uint_format(batadv_bcast_tree, hf_batadv_packet_type, tvb, offset, 1, BATADV_BCAST,
                                       "Packet Type: %s (%u)", "BATADV_BCAST", BATADV_BCAST);
            offset += 1;

            proto_tree_add_item(batadv_bcast_tree, hf_batadv_bcast_version, tvb, offset, 1, FALSE);
            offset += 1;

            proto_tree_add_ether(batadv_bcast_tree, hf_batadv_bcast_orig, tvb, offset, 6, orig_addr);
            offset += 6;

            proto_tree_add_item(batadv_bcast_tree, hf_batadv_bcast_ttl, tvb, offset, 1, FALSE);
            offset += 1;

            proto_tree_add_item(batadv_bcast_tree, hf_batadv_bcast_seqno32, tvb, offset, 4, FALSE);
            offset += 4;
      }

      /* Calculate offset even when we got no tree */
      offset = BCAST_PACKET_V10_SIZE;

      SET_ADDRESS(&pinfo->dl_src, AT_ETHER, 6, orig_addr);
      SET_ADDRESS(&pinfo->src, AT_ETHER, 6, orig_addr);

      tap_queue_packet(batadv_tap, pinfo, bcast_packeth);

      length_remaining = tvb_length_remaining(tvb, offset);

      if (length_remaining != 0) {
            next_tvb = tvb_new_subset(tvb, offset, length_remaining, -1);

            if (have_tap_listener(batadv_follow_tap)) {
                  tap_queue_packet(batadv_follow_tap, pinfo, next_tvb);
            }

            call_dissector(eth_handle, next_tvb, pinfo, tree);
      }
}

static void dissect_batadv_icmp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
      guint8 version;

      /* set protocol name */
      col_set_str(pinfo->cinfo, COL_PROTOCOL, "BATADV_ICMP");

      version = tvb_get_guint8(tvb, 1);
      switch (version) {
      case 6:
            dissect_batadv_icmp_v6(tvb, pinfo, tree);
            break;
      case 7:
      case 8:
      case 9:
      case 10:
            dissect_batadv_icmp_v7(tvb, pinfo, tree);
            break;
      default:
            col_add_fstr(pinfo->cinfo, COL_INFO, "Unsupported Version %d", version);
            call_dissector(data_handle, tvb, pinfo, tree);
            break;
      }
}

static void dissect_batadv_icmp_v6(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
      struct icmp_packet_v6 *icmp_packeth;
      const guint8  *dst_addr, *orig_addr;

      tvbuff_t *next_tvb;
      guint length_remaining;
      int offset = 0;

      icmp_packeth = ep_alloc(sizeof(struct icmp_packet_v6));

      icmp_packeth->version = tvb_get_guint8(tvb, 1);
      icmp_packeth->msg_type = tvb_get_guint8(tvb, 2);
      dst_addr = tvb_get_ptr(tvb, 3, 6);
      SET_ADDRESS(&icmp_packeth->dst, AT_ETHER, 6, dst_addr);
      orig_addr = tvb_get_ptr(tvb, 9, 6);
      SET_ADDRESS(&icmp_packeth->orig, AT_ETHER, 6, orig_addr);
      icmp_packeth->ttl = tvb_get_guint8(tvb, 15);
      icmp_packeth->uid = tvb_get_guint8(tvb, 16);
      icmp_packeth->seqno = tvb_get_ntohs(tvb, 17);

      /* Set info column */
      if (check_col(pinfo->cinfo, COL_INFO)) {
            col_add_fstr(pinfo->cinfo, COL_INFO, "[%s] Seq=%u",
                       val_to_str(icmp_packeth->msg_type, icmp_packettypenames, "Unknown (0x%02x)"),
                       icmp_packeth->seqno);
      }
      /* Set tree info */
      if (tree) {
            proto_item *ti;
            proto_tree *batadv_icmp_tree;

            if (PTREE_DATA(tree)->visible) {
                  ti = proto_tree_add_protocol_format(tree, proto_batadv_plugin, tvb, 0, ICMP_PACKET_V6_SIZE,
                                                      "B.A.T.M.A.N. ICMP, Orig: %s (%s), Dst: %s (%s)",
                                                      get_ether_name(orig_addr), ether_to_str(orig_addr), get_ether_name(dst_addr), ether_to_str(dst_addr));
            } else {
                  ti = proto_tree_add_item(tree, proto_batadv_plugin, tvb, 0, ICMP_PACKET_V6_SIZE, FALSE);
            }
            batadv_icmp_tree = proto_item_add_subtree(ti, ett_batadv_icmp);

            /* items */
            proto_tree_add_uint_format(batadv_icmp_tree, hf_batadv_packet_type, tvb, offset, 1, BATADV_ICMP,
                                       "Packet Type: %s (%u)", "BATADV_ICMP", BATADV_ICMP);
            offset += 1;

            proto_tree_add_item(batadv_icmp_tree, hf_batadv_icmp_version, tvb, offset, 1, FALSE);
            offset += 1;

            proto_tree_add_item(batadv_icmp_tree, hf_batadv_icmp_msg_type, tvb, offset, 1, FALSE);
            offset += 1;

            proto_tree_add_ether(batadv_icmp_tree, hf_batadv_icmp_dst, tvb, offset, 6, dst_addr);
            offset += 6;

            proto_tree_add_ether(batadv_icmp_tree, hf_batadv_icmp_orig, tvb, offset, 6, orig_addr);
            offset += 6;

            proto_tree_add_item(batadv_icmp_tree, hf_batadv_icmp_ttl, tvb, offset, 1, FALSE);
            offset += 1;

            proto_tree_add_item(batadv_icmp_tree, hf_batadv_icmp_uid, tvb, offset, 1, FALSE);
            offset += 1;

            proto_tree_add_item(batadv_icmp_tree, hf_batadv_icmp_seqno, tvb, offset, 1, FALSE);
            offset += 1;
      }

      /* Calculate offset even when we got no tree */
      offset = ICMP_PACKET_V6_SIZE;

      SET_ADDRESS(&pinfo->dl_src, AT_ETHER, 6, orig_addr);
      SET_ADDRESS(&pinfo->src, AT_ETHER, 6, orig_addr);

      SET_ADDRESS(&pinfo->dl_dst, AT_ETHER, 6, orig_addr);
      SET_ADDRESS(&pinfo->dst, AT_ETHER, 6, orig_addr);

      tap_queue_packet(batadv_tap, pinfo, icmp_packeth);

      length_remaining = tvb_length_remaining(tvb, offset);

      if (length_remaining != 0) {
            next_tvb = tvb_new_subset(tvb, offset, length_remaining, -1);

            call_dissector(data_handle, next_tvb, pinfo, tree);
      }
}

static void dissect_batadv_icmp_v7(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
      struct icmp_packet_v7 *icmp_packeth;
      const guint8  *dst_addr, *orig_addr;

      tvbuff_t *next_tvb;
      guint length_remaining;
      int offset = 0;

      icmp_packeth = ep_alloc(sizeof(struct icmp_packet_v7));

      icmp_packeth->version = tvb_get_guint8(tvb, 1);
      icmp_packeth->msg_type = tvb_get_guint8(tvb, 2);
      icmp_packeth->ttl = tvb_get_guint8(tvb, 3);
      dst_addr = tvb_get_ptr(tvb, 4, 6);
      SET_ADDRESS(&icmp_packeth->dst, AT_ETHER, 6, dst_addr);
      orig_addr = tvb_get_ptr(tvb, 10, 6);
      SET_ADDRESS(&icmp_packeth->orig, AT_ETHER, 6, orig_addr);
      icmp_packeth->seqno = tvb_get_ntohs(tvb, 16);
      icmp_packeth->uid = tvb_get_guint8(tvb, 17);

      /* Set info column */
      if (check_col(pinfo->cinfo, COL_INFO)) {
            col_add_fstr(pinfo->cinfo, COL_INFO, "[%s] Seq=%u",
                       val_to_str(icmp_packeth->msg_type, icmp_packettypenames, "Unknown (0x%02x)"),
                       icmp_packeth->seqno);
      }
      /* Set tree info */
      if (tree) {
            proto_item *ti;
            proto_tree *batadv_icmp_tree;

            if (PTREE_DATA(tree)->visible) {
                  ti = proto_tree_add_protocol_format(tree, proto_batadv_plugin, tvb, 0, ICMP_PACKET_V7_SIZE,
                                                      "B.A.T.M.A.N. ICMP, Orig: %s (%s), Dst: %s (%s)",
                                                      get_ether_name(orig_addr), ether_to_str(orig_addr), get_ether_name(dst_addr), ether_to_str(dst_addr));
            } else {
                  ti = proto_tree_add_item(tree, proto_batadv_plugin, tvb, 0, ICMP_PACKET_V7_SIZE, FALSE);
            }
            batadv_icmp_tree = proto_item_add_subtree(ti, ett_batadv_icmp);

            /* items */
            proto_tree_add_uint_format(batadv_icmp_tree, hf_batadv_packet_type, tvb, offset, 1, BATADV_ICMP,
                                       "Packet Type: %s (%u)", "BATADV_ICMP", BATADV_ICMP);
            offset += 1;

            proto_tree_add_item(batadv_icmp_tree, hf_batadv_icmp_version, tvb, offset, 1, FALSE);
            offset += 1;

            proto_tree_add_item(batadv_icmp_tree, hf_batadv_icmp_msg_type, tvb, offset, 1, FALSE);
            offset += 1;

            proto_tree_add_item(batadv_icmp_tree, hf_batadv_icmp_ttl, tvb, offset, 1, FALSE);
            offset += 1;

            proto_tree_add_ether(batadv_icmp_tree, hf_batadv_icmp_dst, tvb, offset, 6, dst_addr);
            offset += 6;

            proto_tree_add_ether(batadv_icmp_tree, hf_batadv_icmp_orig, tvb, offset, 6, orig_addr);
            offset += 6;

            proto_tree_add_item(batadv_icmp_tree, hf_batadv_icmp_seqno, tvb, offset, 1, FALSE);
            offset += 1;

            proto_tree_add_item(batadv_icmp_tree, hf_batadv_icmp_uid, tvb, offset, 1, FALSE);
            offset += 1;
      }

      /* Calculate offset even when we got no tree */
      offset = ICMP_PACKET_V7_SIZE;

      SET_ADDRESS(&pinfo->dl_src, AT_ETHER, 6, orig_addr);
      SET_ADDRESS(&pinfo->src, AT_ETHER, 6, orig_addr);

      SET_ADDRESS(&pinfo->dl_dst, AT_ETHER, 6, orig_addr);
      SET_ADDRESS(&pinfo->dst, AT_ETHER, 6, orig_addr);

      tap_queue_packet(batadv_tap, pinfo, icmp_packeth);

      length_remaining = tvb_length_remaining(tvb, offset);

      if (length_remaining != 0) {
            next_tvb = tvb_new_subset(tvb, offset, length_remaining, -1);

            call_dissector(data_handle, next_tvb, pinfo, tree);
      }
}

static void dissect_batadv_unicast(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
      guint8 version;

      /* set protocol name */
      col_set_str(pinfo->cinfo, COL_PROTOCOL, "BATADV_UNICAST");

      version = tvb_get_guint8(tvb, 1);
      switch (version) {
      case 6:
      case 7:
      case 8:
      case 9:
      case 10:
            dissect_batadv_unicast_v6(tvb, pinfo, tree);
            break;
      default:
            col_add_fstr(pinfo->cinfo, COL_INFO, "Unsupported Version %d", version);
            call_dissector(data_handle, tvb, pinfo, tree);
            break;
      }
}

static void dissect_batadv_unicast_v6(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
      struct unicast_packet_v6 *unicast_packeth;
      const guint8  *dest_addr;

      tvbuff_t *next_tvb;
      guint length_remaining;
      int offset = 0;

      unicast_packeth = ep_alloc(sizeof(struct unicast_packet_v6));

      unicast_packeth->version = tvb_get_guint8(tvb, 1);
      dest_addr = tvb_get_ptr(tvb, 2, 6);
      SET_ADDRESS(&unicast_packeth->dest, AT_ETHER, 6, dest_addr);
      unicast_packeth->ttl = tvb_get_guint8(tvb, 8);

      /* Set info column */
      col_clear(pinfo->cinfo, COL_INFO);

      /* Set tree info */
      if (tree) {
            proto_item *ti;
            proto_tree *batadv_unicast_tree;

            if (PTREE_DATA(tree)->visible) {
                  ti = proto_tree_add_protocol_format(tree, proto_batadv_plugin, tvb, 0, UNICAST_PACKET_V6_SIZE,
                                                      "B.A.T.M.A.N. Unicast, Dst: %s (%s)",
                                                      get_ether_name(dest_addr), ether_to_str(dest_addr));
            } else {
                  ti = proto_tree_add_item(tree, proto_batadv_plugin, tvb, 0, UNICAST_PACKET_V6_SIZE, FALSE);
            }
            batadv_unicast_tree = proto_item_add_subtree(ti, ett_batadv_unicast);

            /* items */
            proto_tree_add_uint_format(batadv_unicast_tree, hf_batadv_packet_type, tvb, offset, 1, BATADV_UNICAST,
                                       "Packet Type: %s (%u)", "BATADV_UNICAST", BATADV_UNICAST);
            offset += 1;

            proto_tree_add_item(batadv_unicast_tree, hf_batadv_unicast_version, tvb, offset, 1, FALSE);
            offset += 1;

            proto_tree_add_ether(batadv_unicast_tree, hf_batadv_unicast_dst, tvb, offset, 6, dest_addr);
            offset += 6;

            proto_tree_add_item(batadv_unicast_tree, hf_batadv_unicast_ttl, tvb, offset, 1, FALSE);
            offset += 1;
      }

      /* Calculate offset even when we got no tree */
      offset = UNICAST_PACKET_V6_SIZE;

      SET_ADDRESS(&pinfo->dl_dst, AT_ETHER, 6, dest_addr);
      SET_ADDRESS(&pinfo->dst, AT_ETHER, 6, dest_addr);

      tap_queue_packet(batadv_tap, pinfo, unicast_packeth);

      length_remaining = tvb_length_remaining(tvb, offset);

      if (length_remaining != 0) {
            next_tvb = tvb_new_subset(tvb, offset, length_remaining, -1);

            if (have_tap_listener(batadv_follow_tap)) {
                  tap_queue_packet(batadv_follow_tap, pinfo, next_tvb);
            }

            call_dissector(eth_handle, next_tvb, pinfo, tree);
      }
}

static void dissect_batadv_vis(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
      guint8 version;

      /* set protocol name */
      col_set_str(pinfo->cinfo, COL_PROTOCOL, "BATADV_VIS");

      version = tvb_get_guint8(tvb, 1);
      switch (version) {
      case 6:
      case 7:
      case 8:
      case 9:
            dissect_batadv_vis_v6(tvb, pinfo, tree);
            break;
      case 10:
            dissect_batadv_vis_v10(tvb, pinfo, tree);
            break;
      default:
            col_add_fstr(pinfo->cinfo, COL_INFO, "Unsupported Version %d", version);
            call_dissector(data_handle, tvb, pinfo, tree);
            break;
      }
}

static void dissect_batadv_vis_v6(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
      struct vis_packet_v6 *vis_packeth;
      const guint8  *vis_orig_addr, *target_orig_addr, *sender_orig_addr;
      proto_tree *batadv_vis_tree = NULL;

      tvbuff_t *next_tvb;
      guint length_remaining, entry_size;
      int offset = 0, i;

      vis_packeth = ep_alloc(sizeof(struct vis_packet_v6));

      vis_packeth->version = tvb_get_guint8(tvb, 1);
      vis_packeth->vis_type = tvb_get_guint8(tvb, 2);
      vis_packeth->seqno = tvb_get_guint8(tvb, 3);
      vis_packeth->entries = tvb_get_guint8(tvb, 4);
      vis_packeth->ttl = tvb_get_guint8(tvb, 5);

      vis_orig_addr = tvb_get_ptr(tvb, 6, 6);
      SET_ADDRESS(&vis_packeth->vis_orig, AT_ETHER, 6, vis_orig_addr);
      target_orig_addr = tvb_get_ptr(tvb, 12, 6);
      SET_ADDRESS(&vis_packeth->target_orig, AT_ETHER, 6, target_orig_addr);
      sender_orig_addr = tvb_get_ptr(tvb, 18, 6);
      SET_ADDRESS(&vis_packeth->sender_orig, AT_ETHER, 6, sender_orig_addr);

      /* Set info column */
      if (check_col(pinfo->cinfo, COL_INFO)) {
            col_add_fstr(pinfo->cinfo, COL_INFO, "[%s] Seq=%u",
                       val_to_str(vis_packeth->vis_type, vis_packettypenames, "Unknown (0x%02x)"),
                       vis_packeth->seqno);
      }
      /* Set tree info */
      if (tree) {
            proto_item *ti;

            if (PTREE_DATA(tree)->visible) {
                  ti = proto_tree_add_protocol_format(tree, proto_batadv_plugin, tvb, 0, VIS_PACKET_V6_SIZE,
                                                      "B.A.T.M.A.N. Vis, Orig: %s (%s)",
                                                      get_ether_name(vis_orig_addr), ether_to_str(vis_orig_addr));
            } else {
                  ti = proto_tree_add_item(tree, proto_batadv_plugin, tvb, 0, VIS_PACKET_V6_SIZE, FALSE);
            }
            batadv_vis_tree = proto_item_add_subtree(ti, ett_batadv_vis);

            /* items */
            proto_tree_add_uint_format(batadv_vis_tree, hf_batadv_packet_type, tvb, offset, 1, BATADV_VIS,
                                       "Packet Type: %s (%u)", "BATADV_VIS", BATADV_VIS);
            offset += 1;

            proto_tree_add_item(batadv_vis_tree, hf_batadv_vis_version, tvb, offset, 1, FALSE);
            offset += 1;

            proto_tree_add_item(batadv_vis_tree, hf_batadv_vis_type, tvb, offset, 1, FALSE);
            offset += 1;

            proto_tree_add_item(batadv_vis_tree, hf_batadv_vis_seqno, tvb, offset, 1, FALSE);
            offset += 1;

            proto_tree_add_item(batadv_vis_tree, hf_batadv_vis_entries, tvb, offset, 1, FALSE);
            offset += 1;

            proto_tree_add_item(batadv_vis_tree, hf_batadv_vis_ttl, tvb, offset, 1, FALSE);
            offset += 1;

            proto_tree_add_ether(batadv_vis_tree, hf_batadv_vis_vis_orig, tvb, offset, 6, vis_orig_addr);
            offset += 6;

            proto_tree_add_ether(batadv_vis_tree, hf_batadv_vis_target_orig, tvb, offset, 6, target_orig_addr);
            offset += 6;

            proto_tree_add_ether(batadv_vis_tree, hf_batadv_vis_sender_orig, tvb, offset, 6, sender_orig_addr);
            offset += 6;
      }

      /* Calculate offset even when we got no tree */
      offset = VIS_PACKET_V6_SIZE;

      SET_ADDRESS(&pinfo->dl_src, AT_ETHER, 6, sender_orig_addr);
      SET_ADDRESS(&pinfo->src, AT_ETHER, 6, vis_orig_addr);

      SET_ADDRESS(&pinfo->dl_dst, AT_ETHER, 6, target_orig_addr);
      SET_ADDRESS(&pinfo->dst, AT_ETHER, 6, target_orig_addr);

      tap_queue_packet(batadv_tap, pinfo, vis_packeth);

      switch (vis_packeth->version) {
      case 6:
      case 7:
            entry_size = VIS_ENTRY_V6_SIZE;
            break;
      default:
      case 8:
      case 9:
            entry_size = VIS_ENTRY_V8_SIZE;
            break;
      }

      for (i = 0; i < vis_packeth->entries; i++) {
            next_tvb = tvb_new_subset(tvb, offset, entry_size, entry_size);

            if (have_tap_listener(batadv_follow_tap)) {
                  tap_queue_packet(batadv_follow_tap, pinfo, next_tvb);
            }

            if (batadv_vis_tree != NULL) {
                  switch (vis_packeth->version) {
                  case 6:
                  case 7:
                        dissect_vis_entry_v6(next_tvb, pinfo, batadv_vis_tree);
                        break;
                  default:
                  case 8:
                  case 9:
                        dissect_vis_entry_v8(next_tvb, pinfo, batadv_vis_tree);
                        break;
                  }
            }

            offset += entry_size;
      }

      length_remaining = tvb_length_remaining(tvb, offset);
      if (length_remaining != 0) {
            next_tvb = tvb_new_subset(tvb, offset, length_remaining, -1);

            if (have_tap_listener(batadv_follow_tap)) {
                  tap_queue_packet(batadv_follow_tap, pinfo, next_tvb);
            }

            call_dissector(data_handle, next_tvb, pinfo, tree);
      }
}

static void dissect_batadv_vis_v10(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
      struct vis_packet_v10 *vis_packeth;
      const guint8  *vis_orig_addr, *target_orig_addr, *sender_orig_addr;
      proto_tree *batadv_vis_tree = NULL;

      tvbuff_t *next_tvb;
      guint length_remaining;
      int offset = 0, i;

      vis_packeth = ep_alloc(sizeof(struct vis_packet_v10));

      vis_packeth->version = tvb_get_guint8(tvb, 1);
      vis_packeth->vis_type = tvb_get_guint8(tvb, 2);
      vis_packeth->entries = tvb_get_guint8(tvb, 3);
      vis_packeth->seqno = tvb_get_ntohl(tvb, 4);
      vis_packeth->ttl = tvb_get_guint8(tvb, 8);

      vis_orig_addr = tvb_get_ptr(tvb, 9, 6);
      SET_ADDRESS(&vis_packeth->vis_orig, AT_ETHER, 6, vis_orig_addr);
      target_orig_addr = tvb_get_ptr(tvb, 15, 6);
      SET_ADDRESS(&vis_packeth->target_orig, AT_ETHER, 6, target_orig_addr);
      sender_orig_addr = tvb_get_ptr(tvb, 21, 6);
      SET_ADDRESS(&vis_packeth->sender_orig, AT_ETHER, 6, sender_orig_addr);

      /* Set info column */
      col_add_fstr(pinfo->cinfo, COL_INFO, "[%s] Seq=%u",
                 val_to_str(vis_packeth->vis_type, vis_packettypenames, "Unknown (0x%02x)"),
                 vis_packeth->seqno);

      /* Set tree info */
      if (tree) {
            proto_item *ti;

            if (PTREE_DATA(tree)->visible) {
                  ti = proto_tree_add_protocol_format(tree, proto_batadv_plugin, tvb, 0, VIS_PACKET_V10_SIZE,
                                                      "B.A.T.M.A.N. Vis, Orig: %s (%s)",
                                                      get_ether_name(vis_orig_addr), ether_to_str(vis_orig_addr));
            } else {
                  ti = proto_tree_add_item(tree, proto_batadv_plugin, tvb, 0, VIS_PACKET_V10_SIZE, FALSE);
            }
            batadv_vis_tree = proto_item_add_subtree(ti, ett_batadv_vis);

            /* items */
            proto_tree_add_uint_format(batadv_vis_tree, hf_batadv_packet_type, tvb, offset, 1, BATADV_VIS,
                                       "Packet Type: %s (%u)", "BATADV_VIS", BATADV_VIS);
            offset += 1;

            proto_tree_add_item(batadv_vis_tree, hf_batadv_vis_version, tvb, offset, 1, FALSE);
            offset += 1;

            proto_tree_add_item(batadv_vis_tree, hf_batadv_vis_type, tvb, offset, 1, FALSE);
            offset += 1;

            proto_tree_add_item(batadv_vis_tree, hf_batadv_vis_entries, tvb, offset, 1, FALSE);
            offset += 1;

            proto_tree_add_item(batadv_vis_tree, hf_batadv_vis_seqno32, tvb, offset, 4, FALSE);
            offset += 4;

            proto_tree_add_item(batadv_vis_tree, hf_batadv_vis_ttl, tvb, offset, 1, FALSE);
            offset += 1;

            proto_tree_add_ether(batadv_vis_tree, hf_batadv_vis_vis_orig, tvb, offset, 6, vis_orig_addr);
            offset += 6;

            proto_tree_add_ether(batadv_vis_tree, hf_batadv_vis_target_orig, tvb, offset, 6, target_orig_addr);
            offset += 6;

            proto_tree_add_ether(batadv_vis_tree, hf_batadv_vis_sender_orig, tvb, offset, 6, sender_orig_addr);
            offset += 6;
      }

      /* Calculate offset even when we got no tree */
      offset = VIS_PACKET_V10_SIZE;

      SET_ADDRESS(&pinfo->dl_src, AT_ETHER, 6, sender_orig_addr);
      SET_ADDRESS(&pinfo->src, AT_ETHER, 6, vis_orig_addr);

      SET_ADDRESS(&pinfo->dl_dst, AT_ETHER, 6, target_orig_addr);
      SET_ADDRESS(&pinfo->dst, AT_ETHER, 6, target_orig_addr);

      tap_queue_packet(batadv_tap, pinfo, vis_packeth);

      for (i = 0; i < vis_packeth->entries; i++) {
            next_tvb = tvb_new_subset(tvb, offset, VIS_ENTRY_V8_SIZE, VIS_ENTRY_V8_SIZE);

            if (have_tap_listener(batadv_follow_tap)) {
                  tap_queue_packet(batadv_follow_tap, pinfo, next_tvb);
            }

            dissect_vis_entry_v8(next_tvb, pinfo, batadv_vis_tree);
            offset += VIS_ENTRY_V8_SIZE;
      }

      length_remaining = tvb_length_remaining(tvb, offset);
      if (length_remaining != 0) {
            next_tvb = tvb_new_subset(tvb, offset, length_remaining, -1);

            if (have_tap_listener(batadv_follow_tap)) {
                  tap_queue_packet(batadv_follow_tap, pinfo, next_tvb);
            }

            call_dissector(data_handle, next_tvb, pinfo, tree);
      }
}

static void dissect_vis_entry_v6(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree)
{
      /* Set tree info */
      if (tree) {
            const guint8  *dst;
            proto_item    *ti;
            proto_tree    *batadv_vis_entry_tree;

            dst = tvb_get_ptr(tvb, 0, 6);

            if (PTREE_DATA(tree)->visible) {
                  ti = proto_tree_add_protocol_format(tree, proto_batadv_plugin, tvb, 0, VIS_ENTRY_V6_SIZE,
                                                      "VIS Entry: %s (%s)",
                                                      get_ether_name(dst), ether_to_str(dst));
            } else {
                  ti = proto_tree_add_item(tree, proto_batadv_plugin, tvb, 0, VIS_ENTRY_V6_SIZE, FALSE);
            }
            batadv_vis_entry_tree = proto_item_add_subtree(ti, ett_batadv_vis_entry);

            proto_tree_add_ether(batadv_vis_entry_tree, hf_batadv_vis_entry_dst, tvb, 0, 6, dst);
            proto_tree_add_item(batadv_vis_entry_tree, hf_batadv_vis_entry_quality, tvb, 6, 1, FALSE);
      }
}

static void dissect_vis_entry_v8(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree)
{
      /* Set tree info */
      if (tree) {
            const guint8  *dst, *src;
            proto_item *ti;
            proto_tree *batadv_vis_entry_tree;

            src = tvb_get_ptr(tvb, 0, 6);
            dst = tvb_get_ptr(tvb, 6, 6);

            if (PTREE_DATA(tree)->visible) {
                  ti = proto_tree_add_protocol_format(tree, proto_batadv_plugin, tvb, 0, VIS_ENTRY_V8_SIZE,
                                                      "VIS Entry: %s (%s)",
                                                      get_ether_name(dst), ether_to_str(dst));
            } else {
                  ti = proto_tree_add_item(tree, proto_batadv_plugin, tvb, 0, VIS_ENTRY_V8_SIZE, FALSE);
            }
            batadv_vis_entry_tree = proto_item_add_subtree(ti, ett_batadv_vis_entry);

            proto_tree_add_ether(batadv_vis_entry_tree, hf_batadv_vis_entry_src, tvb, 0, 6, src);
            proto_tree_add_ether(batadv_vis_entry_tree, hf_batadv_vis_entry_dst, tvb, 6, 6, dst);
            proto_tree_add_item(batadv_vis_entry_tree, hf_batadv_vis_entry_quality, tvb, 12, 1, FALSE);
      }
}

void proto_register_batadv(void)
{
      module_t *batadv_module;

      static hf_register_info hf[] = {
            { &hf_batadv_packet_type,
              { "Packet Type", "batadv.batman.packet_type",
                FT_UINT8, BASE_DEC, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_batman_version,
              { "Version", "batadv.batman.version",
                FT_UINT8, BASE_DEC, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_batman_flags,
              { "Flags", "batadv.batman.flags",
                FT_UINT8, BASE_HEX, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_batman_ttl,
              { "Time to Live", "batadv.batman.ttl",
                FT_UINT8, BASE_DEC, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_batman_gwflags,
              { "Gateway Flags", "batadv.batman.gwflags",
                FT_UINT8, BASE_HEX, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_batman_tq,
              { "Transmission Quality", "batadv.batman.tq",
                FT_UINT8, BASE_DEC, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_batman_seqno,
              { "Sequence number", "batadv.batman.seq",
                FT_UINT16, BASE_DEC, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_batman_seqno32,
              { "Sequence number", "batadv.batman.seq",
                FT_UINT32, BASE_DEC, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_batman_orig,
              { "Originator", "batadv.batman.orig",
                FT_ETHER, BASE_NONE, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_batman_prev_sender,
              { "Received from", "batadv.batman.prev_sender",
                FT_ETHER, BASE_NONE, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_batman_num_hna,
              { "Number of HNAs", "batadv.batman.num_hna",
                FT_UINT8, BASE_DEC, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_batman_pad,
              { "Padding", "batadv.batman.pad",
                FT_UINT8, BASE_DEC, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_batman_flags_directlink,
              { "DirectLink", "batadv.batman.flags.directlink",
                FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x40,
                NULL, HFILL }
            },
            { &hf_batadv_batman_flags_vis_server,
              { "VIS_SERVER", "batadv.batman.flags.vis_server",
                FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x20,
                NULL, HFILL }
            },
            { &hf_batadv_batman_flags_primaries_first_hop,
              { "PRIMARIES_FIRST_HOP", "batadv.batman.flags.primaries_first_hop",
                FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x10,
                NULL, HFILL }
            },
            { &hf_batadv_batman_hna,
              { "Host Network Announcement", "batadv.batman.hna",
                FT_ETHER, BASE_NONE, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_bcast_version,
              { "Version", "batadv.bcast.version",
                FT_UINT8, BASE_DEC, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_bcast_pad,
              { "Padding", "batadv.bcast.pad",
                FT_UINT8, BASE_DEC, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_bcast_orig,
              { "Originator", "batadv.bcast.orig",
                FT_ETHER, BASE_NONE, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_bcast_seqno,
              { "Sequence number", "batadv.bcast.seq",
                FT_UINT16, BASE_DEC, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_bcast_seqno32,
              { "Sequence number", "batadv.bcast.seq",
                FT_UINT32, BASE_DEC, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_bcast_ttl,
              { "Time to Live", "batadv.bcast.ttl",
                FT_UINT8, BASE_DEC, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_icmp_version,
              { "Version", "batadv.icmp.version",
                FT_UINT8, BASE_DEC, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_icmp_msg_type,
              { "Message Type", "batadv.icmp.msg_type",
                FT_UINT8, BASE_DEC, VALS(icmp_packettypenames), 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_icmp_dst,
              { "Destination", "batadv.icmp.dst",
                FT_ETHER, BASE_NONE, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_icmp_orig,
              { "Originator", "batadv.icmp.orig",
                FT_ETHER, BASE_NONE, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_icmp_ttl,
              { "Time to Live", "batadv.icmp.ttl",
                FT_UINT8, BASE_DEC, NULL, 0x0,
                NULL, HFILL}
            },
            { &hf_batadv_icmp_uid,
              { "UID", "batadv.icmp.uid",
                FT_UINT8, BASE_DEC, NULL, 0x0,
                NULL, HFILL}
            },
            { &hf_batadv_icmp_seqno,
              { "Sequence number", "batadv.icmp.seq",
                FT_UINT16, BASE_DEC, NULL, 0x0,
                NULL, HFILL}
            },
            { &hf_batadv_unicast_version,
              { "Version", "batadv.unicast.version",
                FT_UINT8, BASE_DEC, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_unicast_dst,
              { "Destination", "batadv.unicast.dst",
                FT_ETHER, BASE_NONE, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_unicast_ttl,
              { "Time to Live", "batadv.unicast.ttl",
                FT_UINT8, BASE_DEC, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_vis_version,
              { "Version", "batadv.vis.version",
                FT_UINT8, BASE_DEC, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_vis_type,
              { "Type", "batadv.vis.type",
                FT_UINT8, BASE_DEC, VALS(vis_packettypenames), 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_vis_seqno,
              { "Sequence number", "batadv.vis.seq",
                FT_UINT8, BASE_DEC, NULL, 0x0,
                NULL, HFILL}
            },
            { &hf_batadv_vis_seqno32,
              { "Sequence number", "batadv.vis.seq",
                FT_UINT32, BASE_DEC, NULL, 0x0,
                NULL, HFILL}
            },
            { &hf_batadv_vis_entries,
              { "Entries", "batadv.vis.entries",
                FT_UINT8, BASE_DEC, NULL, 0x0,
                "Number of entries", HFILL}
            },
            { &hf_batadv_vis_ttl,
              { "Time to Live", "batadv.vis.ttl",
                FT_UINT8, BASE_DEC, NULL, 0x0,
                NULL, HFILL}
            },
            { &hf_batadv_vis_vis_orig,
              { "Originator", "batadv.vis.vis_orig",
                FT_ETHER, BASE_NONE, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_vis_target_orig,
              { "Target Originator", "batadv.vis.target_orig",
                FT_ETHER, BASE_NONE, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_vis_sender_orig,
              { "Forwarding Originator", "batadv.vis.sender_orig",
                FT_ETHER, BASE_NONE, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_vis_entry_src,
              { "Source", "hf_batadv_vis_entry.src",
                FT_ETHER, BASE_NONE, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_vis_entry_dst,
              { "Destination", "hf_batadv_vis_entry.dst",
                FT_ETHER, BASE_NONE, NULL, 0x0,
                NULL, HFILL }
            },
            { &hf_batadv_vis_entry_quality,
              { "Quality", "batadv.vis.quality",
                FT_UINT8, BASE_DEC, NULL, 0x0,
                NULL, HFILL }
            }
      };

      /* Setup protocol subtree array */
      static gint *ett[] = {
            &ett_batadv_batman,
            &ett_batadv_batman_flags,
            &ett_batadv_batman_hna,
            &ett_batadv_batman_gwflags,
            &ett_batadv_bcast,
            &ett_batadv_icmp,
            &ett_batadv_unicast,
            &ett_batadv_vis,
            &ett_batadv_vis_entry
      };

      proto_batadv_plugin = proto_register_protocol(
                                    "B.A.T.M.A.N. Advanced Protocol",
                                    "BATADV",          /* short name */
                                    "batadv"           /* abbrev */
                            );

      batadv_module = prefs_register_protocol(proto_batadv_plugin,
                                    proto_reg_handoff_batadv);

      prefs_register_uint_preference(batadv_module, "batmanadv.ethertype",
                                     "Ethertype",
                                     "Ethertype used to indicate B.A.T.M.A.N. packet.",
                                     16, &batadv_ethertype);

      proto_register_subtree_array(ett, array_length(ett));
      proto_register_field_array(proto_batadv_plugin, hf, array_length(hf));
}

void proto_reg_handoff_batadv(void)
{
      static gboolean inited = FALSE;
      static unsigned int old_batadv_ethertype;

      if (!inited) {
            batman_handle = create_dissector_handle(dissect_batman_plugin, proto_batadv_plugin);

            data_handle = find_dissector("data");
            eth_handle = find_dissector("eth");

            batadv_tap = register_tap("batman");
            batadv_follow_tap = register_tap("batman_follow");

            inited = TRUE;
      } else {
            dissector_delete("ethertype", old_batadv_ethertype, batman_handle);
      }

      old_batadv_ethertype = batadv_ethertype;
      dissector_add("ethertype", batadv_ethertype, batman_handle);
}

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