/* packet-media.c
 * Routines for displaying an undissected media type (default case),
 * based on the generic "data" dissector.
 *
 * (C) Olivier Biot, 2004
 *
 * Refer to the AUTHORS file or the AUTHORS section in the man page
 * for contacting the author(s) of this file.
 *
 * 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 <wsutil/str_util.h>

void proto_register_media(void);

/* proto_media cannot be static because it's referenced in the
 * print routines
 */
int proto_media = -1;
static gint hf_media_type = -1;
static gint ett_media = -1;
static heur_dissector_list_t heur_subdissector_list;

static int
dissect_media(tvbuff_t *tvb, packet_info *pinfo , proto_tree *tree, void* data)
{
    int bytes;
    proto_item *ti;
    proto_tree *media_tree = 0;
    heur_dtbl_entry_t *hdtbl_entry;

    if (dissector_try_heuristic(heur_subdissector_list, tvb, pinfo, tree, &hdtbl_entry, data)) {
        return tvb_reported_length(tvb);
    }

    /* Add media type to the INFO column if it is visible */
    col_append_fstr(pinfo->cinfo, COL_INFO, " (%s)", (pinfo->match_string) ? pinfo->match_string : "");

    if (tree) {
        if ( (bytes = tvb_reported_length(tvb)) > 0 )
        {
            ti = proto_tree_add_item(tree, proto_media, tvb, 0, -1, ENC_NA);
            media_tree = proto_item_add_subtree(ti, ett_media);

            if (data) {
                /* The media type has parameters */
                proto_tree_add_bytes_format_value(media_tree, hf_media_type, tvb, 0, bytes,
                    NULL, "%s; %s (%d byte%s)",
                    pinfo->match_string, (char *)data,
                    bytes, plurality(bytes, "", "s"));
            } else {
                /* The media type has no parameters */
                proto_tree_add_bytes_format_value(media_tree, hf_media_type, tvb, 0, bytes,
                    NULL, "%s (%d byte%s)",
                    pinfo->match_string ? pinfo->match_string : "",
                    bytes, plurality(bytes, "", "s"));
            }
        }
    }

    return tvb_reported_length(tvb);
}

void
proto_register_media(void)
{
    static hf_register_info hf[] = {
      { &hf_media_type,
        { "Media type", "media.type",
          FT_BYTES, BASE_NONE, NULL, 0,
          NULL, HFILL }},
    };
    static gint *ett[] = {
        &ett_media
    };

    proto_media = proto_register_protocol (
        "Media Type",   /* name */
        "Media",        /* short name */
        "media"         /* abbrev */
        );
    register_dissector("media", dissect_media, proto_media);
    heur_subdissector_list = register_heur_dissector_list("media", proto_media);
    proto_register_field_array(proto_media, hf, array_length(hf));
    proto_register_subtree_array(ett, array_length(ett));

    /*
     * "Media" is used to dissect something whose normal dissector
     * is disabled, so it cannot itself be disabled.
     */
    proto_set_cant_toggle(proto_media);
}

/*
 * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
 *
 * Local variables:
 * c-basic-offset: 4
 * tab-width: 8
 * indent-tabs-mode: nil
 * End:
 *
 * vi: set shiftwidth=4 tabstop=8 expandtab:
 * :indentSize=4:tabSize=8:noTabs=true:
 */