/*
 *  ircd-ratbox: A slightly useful ircd.
 *  m_version.c: Shows ircd version information.
 *
 *  Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
 *  Copyright (C) 1996-2002 Hybrid Development Team
 *  Copyright (C) 2002-2005 ircd-ratbox development team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  USA
 *
 */

#include <stdinc.h>
#include "client.h"
#include "ircd.h"
#include "numeric.h"
#include "s_conf.h"
#include "s_serv.h"
#include "supported.h"
#include "send.h"
#include "msg.h"
#include "parse.h"
#include "modules.h"

static char *confopts(struct Client *source_p);

static int m_version(struct Client *, struct Client *, int, const char **);
static int mo_version(struct Client *, struct Client *, int, const char **);

struct Message version_msgtab = {
    "VERSION", 0, 0, 0, MFLG_SLOW,
    {mg_unreg, {m_version, 0}, {mo_version, 0}, {mo_version, 0}, mg_ignore, {mo_version, 0}}
};

mapi_clist_av1 version_clist[] = { &version_msgtab, NULL };
DECLARE_MODULE_AV1(version, NULL, NULL, version_clist, NULL, NULL, "$Revision: 1887 $");

/*
 * m_version - VERSION command handler
 *      parv[1] = remote server
 */
static int
m_version(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
    static time_t last_used = 0L;

    if(parc > 1) {
        if((last_used + ConfigFileEntry.pace_wait) > rb_current_time()) {
            /* safe enough to give this on a local connect only */
            sendto_one(source_p, form_str(RPL_LOAD2HI),
                       me.name, source_p->name, "VERSION");
            return 0;
        } else
            last_used = rb_current_time();

        if(hunt_server(client_p, source_p, ":%s VERSION :%s", 1, parc, parv) != HUNTED_ISME)
            return 0;
    }

    sendto_one_numeric(source_p, RPL_VERSION, form_str(RPL_VERSION),
                       ircd_version, serno,
                       me.name, confopts(source_p), TS_CURRENT,
                       ServerInfo.sid);

    show_isupport(source_p);

    return 0;
}

/*
 * mo_version - VERSION command handler
 *      parv[1] = remote server
 */
static int
mo_version(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
    if(hunt_server(client_p, source_p, ":%s VERSION :%s", 1, parc, parv) == HUNTED_ISME) {
        sendto_one_numeric(source_p, RPL_VERSION, form_str(RPL_VERSION),
                           ircd_version, serno,
                           me.name, confopts(source_p), TS_CURRENT,
                           ServerInfo.sid);
        show_isupport(source_p);
    }

    return 0;
}

/* confopts()
 * input  - client pointer
 * output - ircd.conf option string
 * side effects - none
 */
static char *
confopts(struct Client *source_p)
{
    static char result[15];
    char *p;

    result[0] = '\0';
    p = result;

    if(ConfigChannel.use_except)
        *p++ = 'e';

    /* might wanna hide this :P */
    if(ServerInfo.hub)
        *p++ = 'H';

    if(ConfigChannel.use_invex)
        *p++ = 'I';

    if(ConfigChannel.use_knock)
        *p++ = 'K';

    *p++ = 'M';
    *p++ = 'p';

    if(opers_see_all_users || ConfigFileEntry.operspy_dont_care_user_info)
        *p++ = 'S';
#ifdef IGNORE_BOGUS_TS
    *p++ = 'T';
#endif

#ifdef HAVE_LIBZ
    *p++ = 'Z';
#endif

#ifdef RB_IPV6
    *p++ = '6';
#endif

    *p = '\0';

    return result;
}