/*
 *  ircd-ratbox: A slightly useful ircd.
 *  m_squit.c: Makes a server quit.
 *
 *  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 "common.h"		/* FALSE bleah */
#include "match.h"
#include "ircd.h"
#include "numeric.h"
#include "s_conf.h"
#include "logger.h"
#include "s_serv.h"
#include "send.h"
#include "msg.h"
#include "parse.h"
#include "modules.h"
#include "hash.h"
#include "s_newconf.h"

static int ms_squit(struct Client *, struct Client *, int, const char **);
static int mo_squit(struct Client *, struct Client *, int, const char **);

struct Message squit_msgtab = {
    "SQUIT", 0, 0, 0, MFLG_SLOW,
    {mg_unreg, mg_not_oper, {ms_squit, 0}, {ms_squit, 0}, mg_ignore, {mo_squit, 2}}
};

mapi_clist_av1 squit_clist[] = { &squit_msgtab, NULL };

DECLARE_MODULE_AV1(squit, NULL, NULL, squit_clist, NULL, NULL, "$Revision: 3161 $");

struct squit_parms {
    const char *server_name;
    struct Client *target_p;
};

static struct squit_parms *find_squit(struct Client *client_p,
                                      struct Client *source_p, const char *server);


/*
 * mo_squit - SQUIT message handler
 *      parv[1] = server name
 *      parv[2] = comment
 */
static int
mo_squit(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
    struct squit_parms *found_squit;
    const char *comment = (parc > 2 && parv[2]) ? parv[2] : client_p->name;

    if((found_squit = find_squit(client_p, source_p, parv[1]))) {
        if(MyConnect(found_squit->target_p)) {
            sendto_realops_snomask(SNO_GENERAL, L_ALL,
                                   "Received SQUIT %s from %s (%s)",
                                   found_squit->target_p->name,
                                   get_client_name(source_p, HIDE_IP), comment);
            ilog(L_SERVER, "Received SQUIT %s from %s (%s)",
                 found_squit->target_p->name, log_client_name(source_p, HIDE_IP),
                 comment);
        } else if(!IsOperRemote(source_p)) {
            sendto_one(source_p, form_str(ERR_NOPRIVS),
                       me.name, source_p->name, "remote");
            return 0;
        }

        exit_client(client_p, found_squit->target_p, source_p, comment);
        return 0;
    } else {
        sendto_one_numeric(source_p, ERR_NOSUCHSERVER, form_str(ERR_NOSUCHSERVER), parv[1]);
    }

    return 0;
}

/*
 * ms_squit - SQUIT message handler
 *      parv[1] = server name
 *      parv[2] = comment
 */
static int
ms_squit(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
    struct Client *target_p;
    const char *comment = (parc > 2 && parv[2]) ? parv[2] : client_p->name;

    if(parc < 2)
        target_p = client_p;
    else {
        if((target_p = find_server(NULL, parv[1])) == NULL)
            return 0;

        if(IsMe(target_p))
            target_p = client_p;
        if(!IsServer(target_p))
            return 0;
    }

    /* Server is closing its link */
    if (target_p == client_p) {
        sendto_realops_snomask(SNO_GENERAL, L_ALL, "Server %s closing link (%s)",
                               target_p->name, comment);
    }
    /*
     **  Notify all opers, if my local link is remotely squitted
     */
    else if(MyConnect(target_p)) {
        sendto_wallops_flags(UMODE_WALLOP, &me,
                             "Remote SQUIT %s from %s (%s)",
                             target_p->name, source_p->name, comment);

        sendto_server(NULL, NULL, CAP_TS6, NOCAPS,
                      ":%s WALLOPS :Remote SQUIT %s from %s (%s)",
                      me.id, target_p->name, source_p->name, comment);

        ilog(L_SERVER, "SQUIT From %s : %s (%s)", source_p->name, target_p->name, comment);
    }
    exit_client(client_p, target_p, source_p, comment);
    return 0;
}


/*
 * find_squit
 * inputs	- local server connection
 *		-
 *		-
 * output	- pointer to struct containing found squit or none if not found
 * side effects	-
 */
static struct squit_parms *
find_squit(struct Client *client_p, struct Client *source_p, const char *server)
{
    static struct squit_parms found_squit;
    struct Client *target_p = NULL;
    struct Client *p;
    rb_dlink_node *ptr;

    /* must ALWAYS be reset */
    found_squit.target_p = NULL;
    found_squit.server_name = NULL;


    /*
     ** The following allows wild cards in SQUIT. Only useful
     ** when the command is issued by an oper.
     */

    RB_DLINK_FOREACH(ptr, global_serv_list.head) {
        p = ptr->data;
        if(IsServer(p) || IsMe(p)) {
            if(match(server, p->name)) {
                target_p = p;
                break;
            }
        }
    }

    if(target_p == NULL)
        return NULL;

    found_squit.target_p = target_p;
    found_squit.server_name = server;

    if(IsMe(target_p)) {
        if(IsClient(client_p)) {
            if(MyClient(client_p))
                sendto_one_notice(source_p, ":You are trying to squit me.");

            return NULL;
        } else {
            found_squit.target_p = client_p;
            found_squit.server_name = client_p->name;
        }
    }

    if(found_squit.target_p != NULL)
        return &found_squit;
    else
        return (NULL);
}
