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[seven-1.x.git] / modules / core / m_kill.c

/*
 *  ircd-ratbox: A slightly useful ircd.
 *  m_kill.c: Kills a user.
 *
 *  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 "hash.h"               /* for find_client() */
#include "ircd.h"
#include "numeric.h"
#include "sprintf_irc.h"
#include "s_log.h"
#include "s_serv.h"
#include "s_conf.h"
#include "send.h"
#include "whowas.h"
#include "irc_string.h"
#include "msg.h"
#include "parse.h"
#include "modules.h"
#include "s_newconf.h"

static char buf[BUFSIZE];

static int ms_kill(struct Client *, struct Client *, int, const char **);
static int mo_kill(struct Client *, struct Client *, int, const char **);
static void relay_kill(struct Client *, struct Client *, struct Client *,
                       const char *, const char *);

static struct Message kill_msgtab = {
        "KILL", 0, 0, 0, MFLG_SLOW,
        {mg_unreg, mg_not_oper, {ms_kill, 2}, {ms_kill, 2}, mg_ignore, {mo_kill, 2}}
};

mapi_clist_av1 kill_clist[] = { &kill_msgtab, NULL };

DECLARE_MODULE_AV1(kill, NULL, NULL, kill_clist, NULL, NULL, "$Revision: 108 $");

/*
** mo_kill
**      parv[0] = sender prefix
**      parv[1] = kill victim
**      parv[2] = kill path
*/
static int
mo_kill(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
        struct Client *target_p;
        const char *inpath = client_p->name;
        const char *user;
        const char *reason;

        user = parv[1];

        if(!IsOperKill(source_p))
        {
                sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "kill");
                return 0;
        }

        if(!EmptyString(parv[2]))
        {
                char *s;
                s = LOCAL_COPY(parv[2]);
                if(strlen(s) > (size_t) KILLLEN)
                        s[KILLLEN] = '\0';
                reason = s;
        }
        else
                reason = "<No reason given>";

        if((target_p = find_named_person(user)) == NULL)
        {
                /*
                 ** If the user has recently changed nick, automatically
                 ** rewrite the KILL for this new nickname--this keeps
                 ** servers in synch when nick change and kill collide
                 */
                if((target_p = get_history(user, (long) KILLCHASETIMELIMIT)) == NULL)
                {
                        if (strchr(user, '.'))
                                sendto_one_numeric(source_p, ERR_CANTKILLSERVER, form_str(ERR_CANTKILLSERVER));
                        else
                                sendto_one_numeric(source_p, ERR_NOSUCHNICK,
                                                   form_str(ERR_NOSUCHNICK), user);
                        return 0;
                }
                sendto_one(source_p, ":%s NOTICE %s :KILL changed from %s to %s",
                           me.name, parv[0], user, target_p->name);
        }

        if (MyClient(source_p) && IsService(target_p))
        {
                sendto_one(source_p, form_str(ERR_ISCHANSERVICE),
                        me.name, source_p->name, target_p->name, "*");
                return 0;
        }

        if(MyConnect(target_p))
                sendto_one(target_p, ":%s!%s@%s KILL %s :%s",
                           source_p->name, source_p->username, source_p->host,
                           target_p->name, reason);

        /* Do not change the format of this message.  There's no point in changing messages
         * that have been around for ever, for no reason..
         *
         * If target is local, send the message netwide. Global kills will cause all servers
         * to send out snotes locally in ms_kill. --spb */
        sendto_realops_snomask(SNO_GENERAL, MyClient(target_p) ? L_NETWIDE : L_ALL,
                             "Received KILL message for %s. From %s Path: %s (%s)",
                             target_p->name, parv[0], me.name, reason);

        ilog(L_KILL, "%c %s %s!%s@%s %s %s",
             MyConnect(target_p) ? 'L' : 'G', get_oper_name(source_p),
             target_p->name, target_p->username, target_p->host, target_p->user->server, reason);

        /*
         ** And pass on the message to other servers. Note, that if KILL
         ** was changed, the message has to be sent to all links, also
         ** back.
         ** Suicide kills are NOT passed on --SRB
         */
        if(!MyConnect(target_p))
        {
                relay_kill(client_p, source_p, target_p, inpath, reason);
                /*
                 ** Set FLAGS_KILLED. This prevents exit_one_client from sending
                 ** the unnecessary QUIT for this. (This flag should never be
                 ** set in any other place)
                 */
                target_p->flags |= FLAGS_KILLED;
        }

        ircsprintf(buf, "Killed by %s (%s)", source_p->name, reason);

        exit_client(client_p, target_p, source_p, buf);

        return 0;
}

/*
 * ms_kill
 *      parv[0] = sender prefix
 *      parv[1] = kill victim
 *      parv[2] = kill path and reason
 */
static int
ms_kill(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
        struct Client *target_p;
        const char *user;
        const char *reason;
        char default_reason[] = "<No reason given>";
        const char *path;
        int chasing = 0;

        *buf = '\0';

        user = parv[1];

        if(EmptyString(parv[2]))
        {
                reason = default_reason;

                /* hyb6 takes the nick of the killer from the path *sigh* --fl_ */
                path = source_p->name;
        }
        else
        {
                char *s = LOCAL_COPY(parv[2]), *t;
                t = strchr(s, ' ');

                if(t)
                {
                        *t = '\0';
                        t++;
                        reason = t;
                }
                else
                        reason = default_reason;

                path = s;
        }

        if((target_p = find_person(user)) == NULL)
        {
                /*
                 * If the user has recently changed nick, but only if its 
                 * not an uid, automatically rewrite the KILL for this new nickname.
                 * --this keeps servers in synch when nick change and kill collide
                 */
                if(IsDigit(*user) || (!(target_p = get_history(user, (long) KILLCHASETIMELIMIT))))
                {
                        sendto_one_numeric(source_p, ERR_NOSUCHNICK,
                                           form_str(ERR_NOSUCHNICK), IsDigit(*user) ? "*" : user);
                        return 0;
                }
                sendto_one_notice(source_p, ":KILL changed from %s to %s", user, target_p->name);
                chasing = 1;
        }

        if(IsServer(target_p) || IsMe(target_p))
        {
                sendto_one_numeric(source_p, ERR_CANTKILLSERVER, form_str(ERR_CANTKILLSERVER));
                return 0;
        }

        if(MyConnect(target_p))
        {
                if(IsServer(source_p))
                {
                        sendto_one(target_p, ":%s KILL %s :%s",
                                   source_p->name, target_p->name, reason);
                }
                else
                        sendto_one(target_p, ":%s!%s@%s KILL %s :%s",
                                   source_p->name, source_p->username, source_p->host,
                                   target_p->name, reason);
        }

        /* Be warned, this message must be From %s, or it confuses clients
         * so dont change it to From: or the case or anything! -- fl -- db */
        /* path must contain at least 2 !'s, or bitchx falsely declares it
         * local --fl
         */
        if(IsOper(source_p))    /* send it normally */
        {
                /* Send this from the server that originated the kill, for consistency with 
                 * local kill messages. --spb */
                sendto_realops_snomask_from(IsService(source_p) ? SNO_SKILL : SNO_GENERAL, L_ALL,
                                     source_p->servptr,
                                     "Received KILL message for %s. From %s Path: %s!%s!%s!%s %s",
                                     target_p->name, parv[0], source_p->user->server,
                                     source_p->host, source_p->username, source_p->name, reason);

                ilog(L_KILL, "%c %s %s!%s@%s %s %s",
                     MyConnect(target_p) ? 'O' : 'R', get_oper_name(source_p),
                     target_p->name, target_p->username, target_p->host,
                     target_p->user->server, reason);
        }
        else
        {
                sendto_realops_snomask(SNO_SKILL, L_ALL,
                                     "Received KILL message for %s. From %s %s",
                                     target_p->name, parv[0], reason);

                ilog(L_KILL, "S %s %s!%s@%s %s %s",
                     source_p->name, target_p->name, target_p->username,
                     target_p->host, target_p->user->server, reason);
        }

        relay_kill(client_p, source_p, target_p, path, reason);

        /* FLAGS_KILLED prevents a quit being sent out */
        target_p->flags |= FLAGS_KILLED;

        ircsprintf(buf, "Killed (%s %s)", source_p->name, reason);

        exit_client(client_p, target_p, source_p, buf);

        return 0;
}

static void
relay_kill(struct Client *one, struct Client *source_p,
           struct Client *target_p, const char *inpath, const char *reason)
{
        struct Client *client_p;
        dlink_node *ptr;
        char buffer[BUFSIZE];

        if(MyClient(source_p))
                ircsnprintf(buffer, sizeof(buffer),
                            "%s!%s!%s!%s (%s)",
                            me.name, source_p->host, source_p->username, source_p->name, reason);
        else
                ircsnprintf(buffer, sizeof(buffer), "%s %s", inpath, reason);

        DLINK_FOREACH(ptr, serv_list.head)
        {
                client_p = ptr->data;

                if(!client_p || client_p == one)
                        continue;

                sendto_one(client_p, ":%s KILL %s :%s",
                           get_id(source_p, client_p), get_id(target_p, client_p), buffer);
        }
}