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/* software_update.h
 * Wrappers and routines to check for software updates.
 *
 * 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 "software_update.h"
#include "../epan/prefs.h"

/*
 * Version 0 of the update URI path has the following elements:
 * - The update path prefix (fixed, "update")
 * - The schema version (fixed, 0)
 * - The application name (fixed, "Wireshark")
 * - The application version ("<major>.<minor>.<micro>")
 * - The operating system (varable, one of "windows" or "osx")
 * - The architecture name (variable, one of "x86", "x86-64")
 * - The locale (fixed, "en-US)
 * - The update channel (variable, one of "development" or "stable") + .xml
 *
 * Based on https://wiki.mozilla.org/Software_Update:Checking_For_Updates
 */

#ifdef HAVE_SOFTWARE_UPDATE
#define SU_SCHEMA_PREFIX "update"
#define SU_SCHEMA_VERSION 0
#define SU_APPLICATION "Wireshark"
#define SU_LOCALE "en-US"
#endif /* HAVE_SOFTWARE_UPDATE */

#if defined(HAVE_SOFTWARE_UPDATE) && defined (_WIN32)

#include "glib.h"

#include <winsparkle.h>

#define SU_OSNAME "Windows"

static GString *update_url_str = NULL;

static const char *get_appcast_update_url(software_update_channel_e chan) {
    const char *chan_name;
    const char *arch = "x86";

    if (!update_url_str) {
        update_url_str = g_string_new("");
    }

    /* XXX Add WOW64 checks similar to version_info.c? */
    if (sizeof(arch) != 4) {
        arch = "x86-64";
    }

    switch (chan) {
        case UPDATE_CHANNEL_DEVELOPMENT:
            chan_name = "development";
            break;
        default:
            chan_name = "stable";
            break;
    }
    g_string_printf(update_url_str, "https://www.wireshark.org/%s/%u/%s/%s/%s/%s/en-US/%s.xml",
                    SU_SCHEMA_PREFIX,
                    SU_SCHEMA_VERSION,
                    SU_APPLICATION,
                    VERSION,
                    SU_OSNAME,
                    arch,
                    chan_name);
    return update_url_str->str;
}

/** Initialize software updates.
 */
void
software_update_init(void) {
    const char *update_url = get_appcast_update_url(prefs.gui_update_channel);

    win_sparkle_set_registry_path("Software\\Wireshark\\WinSparkle Settings");
    win_sparkle_set_appcast_url(update_url);
    win_sparkle_set_automatic_check_for_updates(prefs.gui_update_enabled ? 1 : 0);
    win_sparkle_set_update_check_interval(prefs.gui_update_interval);
    win_sparkle_init();
}

/** Force a software update check.
 */
void
software_update_check(void) {
    win_sparkle_check_update_with_ui();
}

/** Clean up software update checking.
 *
 * Does nothing on platforms that don't support software updates.
 */
extern void software_update_cleanup(void) {
    win_sparkle_cleanup();
}

#else /* defined(HAVE_SOFTWARE_UPDATE) && defined (_WIN32) */

/** Initialize software updates.
 */
void
software_update_init(void) {
}

/** Force a software update check.
 */
void
software_update_check(void) {
}

/** Clean up software update checking.
 *
 * Does nothing on platforms that don't support software updates.
 */
extern void software_update_cleanup(void) {
}

#endif /* defined(HAVE_SOFTWARE_UPDATE) && defined (_WIN32) */

/*
 * Editor modelines
 *
 * Local Variables:
 * c-basic-offset: 4
 * tab-width: 8
 * indent-tabs-mode: nil
 * End:
 *
 * ex: set shiftwidth=4 tabstop=8 expandtab:
 * :indentSize=4:tabSize=8:noTabs=true:
 */