wireshark/epan/dissectors/packet-btobex.c

/* packet-btobex.c
 * Routines for Bluetooth OBEX dissection
 *
 * Copyright 2010, Allan M. Madsen
 *
 * $Id$
 *
 * 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.
 */

#include "config.h"

#include <epan/packet.h>
#include <epan/reassemble.h>

#include "packet-btl2cap.h"
#include "packet-btsdp.h"

/* Initialize the protocol and registered fields */
static int proto_btobex = -1;
static int hf_opcode = -1;
static int hf_response_code = -1;
static int hf_final_flag = -1;
static int hf_length = -1;
static int hf_version = -1;
static int hf_flags = -1;
static int hf_constants = -1;
static int hf_max_pkt_len = -1;
static int hf_set_path_flags_0 = -1;
static int hf_set_path_flags_1 = -1;
static int hf_hdr_id = -1;
static int hf_hdr_length = -1;
static int hf_hdr_val_unicode = -1;
static int hf_hdr_val_byte_seq = -1;
static int hf_hdr_val_byte = -1;
static int hf_hdr_val_long = -1;

/* ************************************************************************* */
/*                   Header values for reassembly                            */
/* ************************************************************************* */
static int hf_btobex_fragments = -1;
static int hf_btobex_fragment = -1;
static int hf_btobex_fragment_overlap = -1;
static int hf_btobex_fragment_overlap_conflict = -1;
static int hf_btobex_fragment_multiple_tails = -1;
static int hf_btobex_fragment_too_long_fragment = -1;
static int hf_btobex_fragment_error = -1;
static int hf_btobex_fragment_count = -1;
static int hf_btobex_reassembled_in = -1;
static int hf_btobex_reassembled_length = -1;

static gint ett_btobex_fragment = -1;
static gint ett_btobex_fragments = -1;

static GHashTable *fragment_table;
static GHashTable *reassembled_table;

static const fragment_items btobex_frag_items = {
    &ett_btobex_fragment,
    &ett_btobex_fragments,
    &hf_btobex_fragments,
    &hf_btobex_fragment,
    &hf_btobex_fragment_overlap,
    &hf_btobex_fragment_overlap_conflict,
    &hf_btobex_fragment_multiple_tails,
    &hf_btobex_fragment_too_long_fragment,
    &hf_btobex_fragment_error,
    &hf_btobex_fragment_count,
    &hf_btobex_reassembled_in,
    &hf_btobex_reassembled_length,
    /* Reassembled data field */
    NULL,
    "fragments"
};

/* Initialize the subtree pointers */
static gint ett_btobex = -1;
static gint ett_btobex_hdrs = -1;
static gint ett_btobex_hdr = -1;

/* FIXME: Using a static like this is far from safe */
static guint8 last_opcode[2] = { 1, 1 };

static dissector_handle_t xml_handle;
static dissector_handle_t data_handle;

typedef struct _ext_value_string {
    guint8 value[16];
    const gchar *strptr;
} ext_value_string;

static const ext_value_string target_vals[] = {
    {   { 0xF9, 0xEC, 0x7B, 0xC4, 0x95, 0x3C, 0x11, 0xD2, 0x98, 0x4E, 0x52, 0x54, 0x00, 0xDC, 0x9E, 0x09 }, "Folder Browsing" },
    {   { 0x79, 0x61, 0x35, 0xf0, 0xf0, 0xc5, 0x11, 0xd8, 0x09, 0x66, 0x08, 0x00, 0x20, 0x0c, 0x9a, 0x66 }, "Phone Book Access" },
    {   { 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x10, 0x00, 0x80, 0x00, 0x00, 0x02, 0xEE, 0x00, 0x00, 0x02 }, "SyncML" },
    {   { 0xE3, 0x3D, 0x95, 0x45, 0x83, 0x74, 0x4A, 0xD7, 0x9E, 0xC5, 0xC1, 0x6B, 0xE3, 0x1E, 0xDE, 0x8E }, "Basic Imaging Push" },
    {   { 0x8E, 0xE9, 0xB3, 0xD0, 0x46, 0x08, 0x11, 0xD5, 0x84, 0x1A, 0x00, 0x02, 0xA5, 0x32, 0x5B, 0x4E }, "Basic Imaging Pull" },
    {   { 0x92, 0x35, 0x33, 0x50, 0x46, 0x08, 0x11, 0xD5, 0x84, 0x1A, 0x00, 0x02, 0xA5, 0x32, 0x5B, 0x4E }, "Basic Imaging Advanced Printing" },
    {   { 0x94, 0x01, 0x26, 0xC0, 0x46, 0x08, 0x11, 0xD5, 0x84, 0x1A, 0x00, 0x02, 0xA5, 0x32, 0x5B, 0x4E }, "Basic Imaging Automativ Archive" },
    {   { 0x94, 0x7E, 0x74, 0x20, 0x46, 0x08, 0x11, 0xD5, 0x84, 0x1A, 0x00, 0x02, 0xA5, 0x32, 0x5B, 0x4E }, "Basic Imaging Remote Camera" },
    {   { 0x94, 0xC7, 0xCD, 0x20, 0x46, 0x08, 0x11, 0xD5, 0x84, 0x1A, 0x00, 0x02, 0xA5, 0x32, 0x5B, 0x4E }, "Basic Imaging Remote Display" },
    {   { 0x8E, 0x61, 0xF9, 0x5D, 0x1A, 0x79, 0x11, 0xD4, 0x8E, 0xA4, 0x00, 0x80, 0x5F, 0x9B, 0x98, 0x34 }, "Basic Imaging Referenced Objects" },
    {   { 0x8E, 0x61, 0xF9, 0x5D, 0x1A, 0x79, 0x11, 0xD4, 0x8E, 0xA4, 0x00, 0x80, 0x5F, 0x9B, 0x98, 0x34 }, "Basic Imaging Archived Objects" },
    {   { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, NULL },
};

static const value_string version_vals[] = {
    { 0x10, "1.0" },
    { 0x11, "1.1" },
    { 0x12, "1.2" },
    { 0x13, "1.3" },
    { 0x20, "2.0" },
    { 0x21, "2.1" },
    { 0,      NULL }
};

#define BTOBEX_CODE_VALS_CONNECT    0x00
#define BTOBEX_CODE_VALS_DISCONNECT 0x01
#define BTOBEX_CODE_VALS_PUT        0x02
#define BTOBEX_CODE_VALS_GET        0x03
#define BTOBEX_CODE_VALS_SET_PATH   0x05
#define BTOBEX_CODE_VALS_CONTINUE   0x10
#define BTOBEX_CODE_VALS_ABORT      0x7F
#define BTOBEX_CODE_VALS_MASK       0x7F

static const value_string code_vals[] = {
    { BTOBEX_CODE_VALS_CONNECT, "Connect" },
    { BTOBEX_CODE_VALS_DISCONNECT, "Disconnect" },
    { BTOBEX_CODE_VALS_PUT, "Put" },
    { BTOBEX_CODE_VALS_GET, "Get"},
    { BTOBEX_CODE_VALS_SET_PATH, "Set Path" },
    { BTOBEX_CODE_VALS_CONTINUE, "Continue" },
    { 0x20, "Success" },
    { 0x21, "Created" },
    { 0x22, "Accepted" },
    { 0x23, "Non-Authoritative Information" },
    { 0x24, "No Content" },
    { 0x25, "Reset Content" },
    { 0x26, "Partial Content" },
    { 0x30, "Multiple Choices" },
    { 0x31, "Moved Permanently" },
    { 0x32, "Moved Temporarily" },
    { 0x33, "See Other" },
    { 0x34, "Not Modified" },
    { 0x35, "Use Proxy" },
    { 0x40, "Bad Request" },
    { 0x41, "Unauthorised" },
    { 0x42, "Payment Required" },
    { 0x43, "Forbidden" },
    { 0x44, "Not Found" },
    { 0x45, "Method Not Allowed" },
    { 0x46, "Not Acceptable" },
    { 0x47, "Proxy Authentication Required" },
    { 0x48, "Request Timeout" },
    { 0x49, "Conflict" },
    { 0x4a, "Gone" },
    { 0x4b, "Length Required" },
    { 0x4c, "Precondition Failed" },
    { 0x4d, "Requested Entity Too Large" },
    { 0x4e, "Requested URL Too Large" },
    { 0x4f, "Unsupported Media Type" },
    { 0x50, "Internal Server Error" },
    { 0x51, "Not Implemented" },
    { 0x52, "Bad Gateway" },
    { 0x53, "Service Unavailable" },
    { 0x54, "Gateway Timeout" },
    { 0x55, "HTTP Version Not Supported" },
    { 0x60, "Database Full" },
    { 0x61, "Database Locked" },
    { BTOBEX_CODE_VALS_ABORT, "Abort" },
    { 0,      NULL }
};
static value_string_ext(code_vals_ext) = VALUE_STRING_EXT_INIT(code_vals);

static const value_string header_id_vals[] = {
    { 0x01, "Name" },
    { 0x05, "Description" },
    { 0x30, "User Defined" },
    { 0x31, "User Defined" },
    { 0x32, "User Defined" },
    { 0x33, "User Defined" },
    { 0x34, "User Defined" },
    { 0x35, "User Defined" },
    { 0x36, "User Defined" },
    { 0x37, "User Defined" },
    { 0x38, "User Defined" },
    { 0x39, "User Defined" },
    { 0x3a, "User Defined" },
    { 0x3b, "User Defined" },
    { 0x3c, "User Defined" },
    { 0x3d, "User Defined" },
    { 0x3e, "User Defined" },
    { 0x3f, "User Defined" },
    { 0x42, "Type" },
    { 0x44, "Time (ISO8601)" },
    { 0x46, "Target" },
    { 0x47, "HTTP" },
    { 0x48, "Body" },
    { 0x49, "End Of Body" },
    { 0x4a, "Who" },
    { 0x4c, "App. Parameters" },
    { 0x4d, "Auth. Challenge" },
    { 0x4e, "Auth. Response" },
    { 0x4f, "Object Class" },
    { 0xc0, "Count" },
    { 0xc3, "Length" },
    { 0xc4, "Time" },
    { 0xcb, "Connection Id" },
    { 0,      NULL }
};
static value_string_ext header_id_vals_ext = VALUE_STRING_EXT_INIT(header_id_vals);

static void
defragment_init(void)
{
    fragment_table_init(&fragment_table);
    reassembled_table_init(&reassembled_table);
}

static int
is_ascii_str(const guint8 *str, int length)
{
    int i;

    if ((length < 1) || (str[length-1] != '\0'))
        return 0;

    for(i=0; i<length-1; i++) {
        if ((str[i] < 0x20) && (str[i] != 0x0a)) /* not strict ascii */
        break;
    }

    if (i < (length-1))
        return 0;

    return 1;
}

static int
display_unicode_string(tvbuff_t *tvb, proto_tree *tree, int offset, char **data)
{
    char    *str, *p;
    int      len;
    int      charoffset;
    guint16  character;

    /* display a unicode string from the tree and return new offset */
    /*
    * Get the length of the string.
    */
    len = 0;
    while (tvb_get_ntohs(tvb, offset + len) != '\0')
        len += 2;

    len += 2;   /* count the '\0' too */

    /*
    * Allocate a buffer for the string; "len" is the length in
    * bytes, not the length in characters.
    */
    str = ep_alloc(len/2);

    /* - this assumes the string is just ISO 8859-1 */
    charoffset = offset;
    p = str;
    while ((character = tvb_get_ntohs(tvb, charoffset)) != '\0') {
        *p++ = (char) character;
        charoffset += 2;
    }
    *p = '\0';

    if (!is_ascii_str((const guint8 *) str, len / 2)) {
        *str = '\0';
    }

    proto_tree_add_string(tree, hf_hdr_val_unicode, tvb, offset, len, str);

    if (data)
        *data = str;

    return  offset+len;
}


static int
dissect_headers(proto_tree *tree, tvbuff_t *tvb, int offset, packet_info *pinfo)
{
    proto_tree *hdrs_tree   = NULL;
    proto_tree *hdr_tree    = NULL;
    proto_item *hdr         = NULL;
    proto_item *handle_item;
    gint        item_length = -1;
    guint8      hdr_id, i;

    if (tvb_length_remaining(tvb, offset) > 0) {
        proto_item *hdrs;
        hdrs      = proto_tree_add_text(tree, tvb, offset, item_length, "Headers");
        hdrs_tree = proto_item_add_subtree(hdrs, ett_btobex_hdrs);
    }
    else {
        return offset;
    }

    while (tvb_length_remaining(tvb, offset) > 0) {
        hdr_id = tvb_get_guint8(tvb, offset);

        switch(0xC0 & hdr_id)
        {
            case 0x00: /* null terminated unicode */
                item_length = tvb_get_ntohs(tvb, offset+1);
                break;
            case 0x40:  /* byte sequence */
                item_length = tvb_get_ntohs(tvb, offset+1);
                break;
            case 0x80:  /* 1 byte */
                item_length = 2;
                break;
            case 0xc0:  /* 4 bytes */
                item_length = 5;
                break;
        }

        hdr = proto_tree_add_text(hdrs_tree, tvb, offset, item_length, "%s",
                                  val_to_str_ext_const(hdr_id, &header_id_vals_ext, "Unknown"));
        hdr_tree = proto_item_add_subtree(hdr, ett_btobex_hdr);

        proto_tree_add_item(hdr_tree, hf_hdr_id, tvb, offset, 1, ENC_BIG_ENDIAN);

        offset++;

        switch(0xC0 & hdr_id)
        {
            case 0x00: /* null terminated unicode */
                {
                    proto_tree_add_item(hdr_tree, hf_hdr_length, tvb, offset, 2, ENC_BIG_ENDIAN);
                    offset += 2;

                    if ((item_length - 3) > 0) {
                        char *str;

                        display_unicode_string(tvb, hdr_tree, offset, &str);
                        proto_item_append_text(hdr_tree, " (\"%s\")", str);
                        col_append_fstr(pinfo->cinfo, COL_INFO, " \"%s\"", str);
                    }
                    else {
                        col_append_str(pinfo->cinfo, COL_INFO, " \"\"");
                    }

                    offset += item_length - 3;
                }
                break;
            case 0x40:  /* byte sequence */
                proto_tree_add_item(hdr_tree, hf_hdr_length, tvb, offset, 2, ENC_BIG_ENDIAN);
                offset += 2;

                handle_item = proto_tree_add_item(hdr_tree, hf_hdr_val_byte_seq, tvb, offset, item_length - 3, ENC_NA);

                if (((hdr_id == 0x46) || (hdr_id == 0x4a)) && (item_length == 19)) { /* target or who */
                    for(i=0; target_vals[i].strptr != NULL; i++) {
                        if (tvb_memeql(tvb, offset, target_vals[i].value, 16) == 0) {
                            proto_item_append_text(handle_item, ": %s", target_vals[i].strptr);
                            proto_item_append_text(hdr_tree, " (%s)", target_vals[i].strptr);
                            col_append_fstr(pinfo->cinfo, COL_INFO, " - %s", target_vals[i].strptr);
                        }
                    }
                }

                if (!tvb_strneql(tvb, offset, "<?xml", 5))
                {
                    tvbuff_t* next_tvb = tvb_new_subset_remaining(tvb, offset);

                    call_dissector(xml_handle, next_tvb, pinfo, tree);
                }
                else if (is_ascii_str(tvb_get_ptr(tvb, offset,item_length - 3), item_length - 3))
                {
                    proto_item_append_text(hdr_tree, " (\"%s\")", tvb_get_ephemeral_string(tvb, offset,item_length - 3));
                    col_append_fstr(pinfo->cinfo, COL_INFO, " \"%s\"", tvb_get_ephemeral_string(tvb, offset,item_length - 3));
                }

                offset += item_length - 3;
                break;
            case 0x80:  /* 1 byte */
                proto_item_append_text(hdr_tree, " (%i)", tvb_get_ntohl(tvb, offset));
                proto_tree_add_item(hdr_tree, hf_hdr_val_byte, tvb, offset, 1, ENC_BIG_ENDIAN);
                offset++;
                break;
            case 0xc0:  /* 4 bytes */
                proto_item_append_text(hdr_tree, " (%i)", tvb_get_ntohl(tvb, offset));
                proto_tree_add_item(hdr_tree, hf_hdr_val_long, tvb, offset, 4, ENC_BIG_ENDIAN);
                offset += 4;
                break;
            default:
                break;
        }
    }

    return offset;
}

static void
dissect_btobex(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
    proto_item    *ti;
    proto_tree    *st;
    fragment_data *frag_msg       = NULL;
    gboolean       save_fragmented, complete;
    tvbuff_t*      new_tvb        = NULL;
    tvbuff_t*      next_tvb       = NULL;
    guint32        no_of_segments = 0;
    int            offset         = 0;

    save_fragmented = pinfo->fragmented;

    frag_msg = NULL;
    complete = FALSE;

    if (fragment_get(pinfo, pinfo->p2p_dir, fragment_table)) {
        /* not the first fragment */
        frag_msg = fragment_add_seq_next(tvb, 0, pinfo, pinfo->p2p_dir,
                                fragment_table, reassembled_table, tvb_length(tvb), TRUE);

        new_tvb = process_reassembled_data(tvb, 0, pinfo,
                        "Reassembled Obex packet", frag_msg, &btobex_frag_items, NULL, tree);

        pinfo->fragmented = TRUE;
    }
    else    {
        if (tvb_length(tvb) < tvb_get_ntohs(tvb, offset+1)) {
            /* first fragment in a sequence */
            no_of_segments = tvb_get_ntohs(tvb, offset+1)/tvb_length(tvb);
            if (tvb_get_ntohs(tvb, offset+1) > (no_of_segments * tvb_length(tvb)))
                no_of_segments++;

            frag_msg = fragment_add_seq_next(tvb, 0, pinfo, pinfo->p2p_dir,
                                fragment_table, reassembled_table, tvb_length(tvb), TRUE);

            fragment_set_tot_len(pinfo, pinfo->p2p_dir, fragment_table, no_of_segments-1);

            new_tvb = process_reassembled_data(tvb, 0, pinfo,
                        "Reassembled Obex packet", frag_msg, &btobex_frag_items, NULL, tree);

            pinfo->fragmented = TRUE;
            }
        else if (tvb_length(tvb) == tvb_get_ntohs(tvb, offset+1)) {
            /* non-fragmented */
            complete = TRUE;
            pinfo->fragmented = FALSE;
        }
    }

    if (new_tvb) { /* take it all */
        next_tvb = new_tvb;
        complete = TRUE;
    }
    else { /* make a new subset */
        next_tvb = tvb_new_subset_remaining(tvb, offset);
    }

    if (complete) {
        guint8 code, final_flag;

        /* fully dissectable packet ready */
        col_set_str(pinfo->cinfo, COL_PROTOCOL, "OBEX");

        ti = proto_tree_add_item(tree, proto_btobex, next_tvb, 0, -1, ENC_NA);
        st = proto_item_add_subtree(ti, ett_btobex);

        /* op/response code */
        code = tvb_get_guint8(next_tvb, offset) & BTOBEX_CODE_VALS_MASK;
        final_flag = tvb_get_guint8(next_tvb, offset) & 0x80;

        switch (pinfo->p2p_dir)
        {
        case P2P_DIR_SENT:
            col_add_fstr(pinfo->cinfo, COL_INFO, "Sent ");
            break;

        case P2P_DIR_RECV:
            col_add_fstr(pinfo->cinfo, COL_INFO, "Rcvd ");
            break;

        case P2P_DIR_UNKNOWN:
            break;

        default:
            col_add_fstr(pinfo->cinfo, COL_INFO, "Unknown direction %d ",
                pinfo->p2p_dir);
            break;
        }

        col_append_fstr(pinfo->cinfo, COL_INFO, "%s",
                        val_to_str_ext_const(code, &code_vals_ext, "Unknown"));

        if ((code < BTOBEX_CODE_VALS_CONTINUE) || (code == BTOBEX_CODE_VALS_ABORT)) {
            proto_tree_add_item(st, hf_opcode, next_tvb, offset, 1, ENC_BIG_ENDIAN);
            if (pinfo->p2p_dir == P2P_DIR_SENT || pinfo->p2p_dir == P2P_DIR_RECV) {
                last_opcode[pinfo->p2p_dir] = code;
            }
            }
        else    {
            proto_tree_add_item(st, hf_response_code, next_tvb, offset, 1, ENC_BIG_ENDIAN);
            }
        proto_tree_add_item(st, hf_final_flag, next_tvb, offset, 1, ENC_BIG_ENDIAN);
        offset++;

        /* length */
        proto_tree_add_item(st, hf_length, next_tvb, offset, 2, ENC_BIG_ENDIAN);
        offset += 2;

        switch(code)
        {
        case BTOBEX_CODE_VALS_CONNECT:
            proto_tree_add_item(st, hf_version, next_tvb, offset, 1, ENC_BIG_ENDIAN);
            offset++;

            proto_tree_add_item(st, hf_flags, next_tvb, offset, 1, ENC_BIG_ENDIAN);
            offset++;

            proto_tree_add_item(st, hf_max_pkt_len, next_tvb, offset, 2, ENC_BIG_ENDIAN);
            offset += 2;
            break;

        case BTOBEX_CODE_VALS_PUT:
        case BTOBEX_CODE_VALS_GET:
            col_append_fstr(pinfo->cinfo, COL_INFO, " %s",  (final_flag == 0x80) ? "final" : "continue");
            break;

        case BTOBEX_CODE_VALS_SET_PATH:
            proto_tree_add_item(st, hf_flags, next_tvb, offset, 1, ENC_BIG_ENDIAN);
            proto_tree_add_item(st, hf_set_path_flags_0, next_tvb, offset, 1, ENC_BIG_ENDIAN);
            proto_tree_add_item(st, hf_set_path_flags_1, next_tvb, offset, 1, ENC_BIG_ENDIAN);
            offset++;

            proto_tree_add_item(st, hf_constants, next_tvb, offset, 1, ENC_BIG_ENDIAN);
            offset++;
            break;

        case BTOBEX_CODE_VALS_DISCONNECT:
        case BTOBEX_CODE_VALS_ABORT:
            break;

        default:
            {
                guint8 response_opcode = last_opcode[(pinfo->p2p_dir + 1) & 0x01];

                if (response_opcode == BTOBEX_CODE_VALS_CONNECT) {
                    proto_tree_add_item(st, hf_version, next_tvb, offset, 1, ENC_BIG_ENDIAN);
                    offset++;

                    proto_tree_add_item(st, hf_flags, next_tvb, offset, 1, ENC_BIG_ENDIAN);
                    offset++;

                    proto_tree_add_item(st, hf_max_pkt_len, next_tvb, offset, 2, ENC_BIG_ENDIAN);
                    offset += 2;
                }
            }
            break;
        }

        dissect_headers(st, next_tvb, offset, pinfo);
    }
    else
    {
        /* packet fragment */
        col_add_fstr(pinfo->cinfo, COL_INFO, "%s Obex fragment",
                     (pinfo->p2p_dir==P2P_DIR_SENT) ? "Sent" : "Rcvd");

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

    pinfo->fragmented = save_fragmented;
}


void
proto_register_btobex(void)
{
    static hf_register_info hf[] = {
        { &hf_opcode,
          { "Opcode", "btobex.opcode",
            FT_UINT8, BASE_HEX|BASE_EXT_STRING, &code_vals_ext, BTOBEX_CODE_VALS_MASK,
            "Request Opcode", HFILL}
        },
        { &hf_response_code,
          { "Response Code", "btobex.resp_code",
            FT_UINT8, BASE_HEX|BASE_EXT_STRING, &code_vals_ext, BTOBEX_CODE_VALS_MASK,
            NULL, HFILL}
        },
        { &hf_final_flag,
          { "Final Flag", "btobex.final_flag",
            FT_BOOLEAN, 8, NULL, 0x80,
            NULL, HFILL}
        },
        { &hf_length,
          { "Packet Length", "btobex.pkt_len",
            FT_UINT16, BASE_DEC, NULL, 0,
            NULL, HFILL}
        },
        { &hf_version,
          { "Version", "btobex.version",
            FT_UINT8, BASE_HEX, VALS(version_vals), 0x00,
            "Obex Protocol Version", HFILL}
        },
        { &hf_flags,
          { "Flags", "btobex.flags",
            FT_UINT8, BASE_HEX, NULL, 0x00,
            NULL, HFILL}
        },
        { &hf_constants,
          { "Constants", "btobex.constants",
            FT_UINT8, BASE_HEX, NULL, 0x00,
            NULL, HFILL}
        },
        { &hf_max_pkt_len,
          { "Max. Packet Length", "btobex.max_pkt_len",
            FT_UINT16, BASE_DEC, NULL, 0,
            NULL, HFILL}
        },
        { &hf_set_path_flags_0,
          { "Go back one folder (../) first", "btobex.set_path_flags_0",
            FT_BOOLEAN, 8, NULL, 0x01,
            NULL, HFILL}
        },
        { &hf_set_path_flags_1,
          { "Do not create folder, if not existing", "btobex.set_path_flags_1",
            FT_BOOLEAN, 8, NULL, 0x02,
            NULL, HFILL}
        },
        { &hf_hdr_id,
          { "Header Id", "btobex.hdr_id",
            FT_UINT8, BASE_HEX|BASE_EXT_STRING, &header_id_vals_ext, 0x00,
            NULL, HFILL}
        },
        { &hf_hdr_length,
          { "Length", "btobex.pkt_hdr_len",
            FT_UINT16, BASE_DEC, NULL, 0,
            "Header Length", HFILL}
        },
        { &hf_hdr_val_unicode,
          { "Value", "btobex.pkt_hdr_val_uc",
            FT_STRING, BASE_NONE, NULL, 0,
            "Unicode Value", HFILL }
        },
        { &hf_hdr_val_byte_seq,
          { "Value", "btobex.hdr_val_byte_seq",
            FT_BYTES, BASE_NONE, NULL, 0,
            "Byte Value", HFILL}
        },
        { &hf_hdr_val_byte,
          { "Value", "btobex.hdr_val_byte",
            FT_UINT8, BASE_HEX, NULL, 0,
            "Byte Sequence Value", HFILL}
        },
        { &hf_hdr_val_long,
          { "Value", "btobex.hdr_val_long",
            FT_UINT32, BASE_DEC, NULL, 0,
            "4-byte Value", HFILL}
        },

        /* for fragmentation */
        { &hf_btobex_fragment_overlap,
          { "Fragment overlap",   "btobex.fragment.overlap", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
            "Fragment overlaps with other fragments", HFILL }
        },
        { &hf_btobex_fragment_overlap_conflict,
          { "Conflicting data in fragment overlap",   "btobex.fragment.overlap.conflict", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
            "Overlapping fragments contained conflicting data", HFILL }
        },
        { &hf_btobex_fragment_multiple_tails,
          { "Multiple tail fragments found",  "btobex.fragment.multipletails", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
            "Several tails were found when defragmenting the packet", HFILL }
        },
        { &hf_btobex_fragment_too_long_fragment,
          { "Fragment too long",  "btobex.fragment.toolongfragment", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
            "Fragment contained data past end of packet", HFILL }
        },
        { &hf_btobex_fragment_error,
          { "Defragmentation error", "btobex.fragment.error", FT_FRAMENUM, BASE_NONE, NULL, 0x0,
            "Defragmentation error due to illegal fragments", HFILL }
        },
        { &hf_btobex_fragment_count,
          { "Fragment count", "btobex.fragment.count", FT_UINT32, BASE_DEC, NULL, 0x0,
            NULL, HFILL }
        },
        { &hf_btobex_fragment,
          { "OBEX Fragment", "btobex.fragment", FT_FRAMENUM, BASE_NONE, NULL, 0x0,
            "btobex Fragment", HFILL }
        },
        { &hf_btobex_fragments,
          { "OBEX Fragments", "btobex.fragments", FT_NONE, BASE_NONE, NULL, 0x0,
            "btobex Fragments", HFILL }
        },
        { &hf_btobex_reassembled_in,
          { "Reassembled OBEX in frame", "btobex.reassembled_in", FT_FRAMENUM, BASE_NONE, NULL, 0x0,
            "This OBEX frame is reassembled in this frame", HFILL }
        },
        { &hf_btobex_reassembled_length,
          { "Reassembled OBEX length", "btobex.reassembled.length", FT_UINT32, BASE_DEC, NULL, 0x0,
            "The total length of the reassembled payload", HFILL }
        }
    };

    /* Setup protocol subtree array */
    static gint *ett[] = {
        &ett_btobex,
        &ett_btobex_hdrs,
        &ett_btobex_hdr,
        &ett_btobex_fragment,
        &ett_btobex_fragments
    };

    proto_btobex = proto_register_protocol("Bluetooth OBEX Protocol", "OBEX", "btobex");

    register_dissector("btobex", dissect_btobex, proto_btobex);

    /* Required function calls to register the header fields and subtrees used */
    proto_register_field_array(proto_btobex, hf, array_length(hf));
    proto_register_subtree_array(ett, array_length(ett));

    register_init_routine(&defragment_init);
}

void
proto_reg_handoff_btobex(void)
{
    dissector_handle_t btobex_handle;

    btobex_handle = find_dissector("btobex");

    /* register in rfcomm and l2cap the profiles/services this dissector should handle */
    dissector_add_uint("btrfcomm.service", BTSDP_OPP_SERVICE_UUID,            btobex_handle);
    dissector_add_uint("btrfcomm.service", BTSDP_FTP_SERVICE_UUID,            btobex_handle);
    dissector_add_uint("btrfcomm.service", BTSDP_BPP_SERVICE_UUID,            btobex_handle);
    dissector_add_uint("btrfcomm.service", BTSDP_BPP_STATUS_SERVICE_UUID,     btobex_handle);
    dissector_add_uint("btrfcomm.service", BTSDP_BIP_SERVICE_UUID,            btobex_handle);
    dissector_add_uint("btrfcomm.service", BTSDP_BIP_RESPONDER_SERVICE_UUID,  btobex_handle);
    dissector_add_uint("btrfcomm.service", BTSDP_BIP_AUTO_ARCH_SERVICE_UUID,  btobex_handle);
    dissector_add_uint("btrfcomm.service", BTSDP_BIP_REF_OBJ_SERVICE_UUID,    btobex_handle);
    dissector_add_uint("btrfcomm.service", BTSDP_PBAP_PCE_SERVICE_UUID,       btobex_handle);
    dissector_add_uint("btrfcomm.service", BTSDP_PBAP_PSE_SERVICE_UUID,       btobex_handle);
    dissector_add_uint("btrfcomm.service", BTSDP_PBAP_SERVICE_UUID,           btobex_handle);
    dissector_add_uint("btrfcomm.service", BTSDP_MAP_SERVICE_UUID,            btobex_handle);
    dissector_add_uint("btrfcomm.service", BTSDP_MAP_ACCESS_SRV_SERVICE_UUID, btobex_handle);
    dissector_add_uint("btrfcomm.service", BTSDP_MAP_NOIYFY_SRV_SERVICE_UUID, btobex_handle);

    dissector_add_uint("btl2cap.service",  BTSDP_OPP_SERVICE_UUID,            btobex_handle);
    dissector_add_uint("btl2cap.service",  BTSDP_FTP_SERVICE_UUID,            btobex_handle);
    dissector_add_uint("btl2cap.service",  BTSDP_BPP_SERVICE_UUID,            btobex_handle);
    dissector_add_uint("btl2cap.service",  BTSDP_BPP_STATUS_SERVICE_UUID,     btobex_handle);
    dissector_add_uint("btl2cap.service",  BTSDP_BIP_SERVICE_UUID,            btobex_handle);
    dissector_add_uint("btl2cap.service",  BTSDP_BIP_RESPONDER_SERVICE_UUID,  btobex_handle);
    dissector_add_uint("btl2cap.service",  BTSDP_BIP_AUTO_ARCH_SERVICE_UUID,  btobex_handle);
    dissector_add_uint("btl2cap.service",  BTSDP_BIP_REF_OBJ_SERVICE_UUID,    btobex_handle);
    dissector_add_uint("btl2cap.service",  BTSDP_PBAP_PCE_SERVICE_UUID,       btobex_handle);
    dissector_add_uint("btl2cap.service",  BTSDP_PBAP_PSE_SERVICE_UUID,       btobex_handle);
    dissector_add_uint("btl2cap.service",  BTSDP_PBAP_SERVICE_UUID,           btobex_handle);
    dissector_add_uint("btl2cap.service",  BTSDP_MAP_SERVICE_UUID,            btobex_handle);
    dissector_add_uint("btl2cap.service",  BTSDP_MAP_ACCESS_SRV_SERVICE_UUID, btobex_handle);
    dissector_add_uint("btl2cap.service",  BTSDP_MAP_NOIYFY_SRV_SERVICE_UUID, btobex_handle);

    xml_handle  = find_dissector("xml");
    data_handle = find_dissector("data");
}