/*
 *   IRC - Internet Relay Chat, modules/m_kill.c
 *
 *   Copyright (C) 2000-2003 TR-IRCD Development
 *
 *   Copyright (C) 1990 Jarkko Oikarinen and
 *                      University of Oulu, Co Center
 *
 *   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, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include "struct.h"
#include "common.h"
#include "sys.h"
#include "numeric.h"
#include "msg.h"
#include "channel.h"
#include "s_conf.h"
#include "h.h"

static char buf2[BUFSIZE];
static char *token = TOK1_KILL;

static struct Message _msgtab[] = {
    {MSG_KILL, 0, MAXPARA, M_SLOW, 0L,
     m_unregistered, m_permission, m_kill, s_kill, m_ignore}
};

#ifndef STATIC_MODULES

char *_version = "$Revision: 1.6 $";

void _modinit(void)
{
    mod_add_cmd(_msgtab);
    tok1_msgtab[(u_char) *token].msg = _msgtab;
}

void _moddeinit(void)
{
    mod_del_cmd(_msgtab);
    tok1_msgtab[(u_char) *token].msg = NULL;
}
#else
void m_kill_init(void)
{
    mod_add_cmd(_msgtab);
    tok1_msgtab[(u_char) *token].msg = _msgtab;
}
#endif

/*
 * * m_kill * parv[0] = sender prefix *       parv[1] = kill victim *
 * parv[2] = kill path
 */
int m_kill(aClient *cptr, aClient *sptr, int parc, char *parv[])
{
    aClient *acptr;
    char *user, *path, *killer, *p, *nick;
    char mypath[KILLLEN + 1];
    int chasing = 0, kcount = 0;

    if (!OPIsOpKill(sptr) && MyConnect(sptr)) {
        return m_permission(cptr, sptr, parc, parv);
    }

    if (parc < 2 || *parv[1] == '\0') {
	send_me_numeric(sptr, ERR_NEEDMOREPARAMS, MSG_KILL);
	return 0;
    }

    user = parv[1];
    path = parv[2];		/*
				 * Either defined or NULL (parc >= 2!!)
				 */
    if (path == NULL)
	path = ")";

    if (IsAnOper(cptr)) {
	if (!BadPtr(path))
	    if (strlen(path) > (size_t) KILLLEN)
		path[KILLLEN] = '\0';
    }
    if (MyClient(sptr))
	user = canonize(user);
    for (p = NULL, nick = strtoken(&p, user, ","); nick; nick = strtoken(&p, NULL, ",")) {
	chasing = 0;
	if (!(acptr = find_client(nick))) {
	    /*
	     * * If the user has recently changed nick, we automaticly *
	     * rewrite the KILL for this new nickname--this keeps *
	     * servers in synch when nick change and kill collide
	     */
	    if (!(acptr = get_history(nick, (long)
				      KILLCHASETIMELIMIT))) {
		send_me_numeric(sptr, ERR_NOSUCHNICK, nick);
		return 0;
	    }
	    send_me_notice(sptr, ":KILL changed from %s to %s", nick, acptr->name);
	    chasing = 1;
	}

	if (IsServer(acptr) || IsMe(acptr)) {
	    send_me_numeric(sptr, ERR_CANTKILLSERVER);
	    continue;
	}
	kcount++;
	if (!IsServer(sptr) && (kcount > MAXKILLS)) {
	    send_me_notice(sptr,
			   ":Too many targets, kill list was truncated. Maximum is %d.", MAXKILLS);
	    break;
	}

	if (MyClient(sptr)) {
    char myname[HOSTLEN + 1], *s;
    int slen;
	    strlcpy_irc(myname, me.name, 80);
	    if ((s = index(myname, '.')))
		*s = 0;
	    /*
	     * "<myname>!<sptr->user->host>!<sptr->name> (path)"
	     */
	    slen = KILLLEN - (strlen(sptr->name) + 6 + strlen(myname) + 8);
	    if (slen < 0)
		slen = 0;
	    if (strlen(path) > slen)
		path[slen] = '\0';
	    ircsprintf(mypath, "%s!ircops!%s (%s)", myname, sptr->name, path);
	    mypath[KILLLEN] = '\0';
	} else
	    strlcpy_irc(mypath, path, KILLLEN);
	/*
	 * * Notify all *local* opers about the KILL, this includes the
	 * one * originating the kill, if from this server--the special
	 * numeric * reply message is not generated anymore. *
	 * 
	 * Note: "acptr->name" is used instead of "user" because we may 
	 * have changed the target because of the nickname change.
	 */

	if (IsAnOper(sptr))
	    sendto_lev(0, "Received KILL message for %C. From %C Path: %s", acptr, sptr, mypath);
	else
	    sendto_lev(SKILL_LEV,
		       "Received KILL message for %^C. From %C Path: %s", acptr, sptr, mypath);
	/*
	 * * 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(acptr) || !MyConnect(sptr) || !IsAnOper(sptr)) {
	    sendto_serv_butone(cptr, sptr, TOK1_KILL, "%~C :%s", acptr, mypath);
	    if (chasing && IsServer(cptr))
		sendto_one_server(cptr, &me, TOK1_KILL, "%~C :%s", acptr, mypath);
	    acptr->flags |= FLAGS_KILLED;
	    sendto_service(SERVICE_SEE_KILLS, 0, sptr, NULL, TOK1_KILL,
			   "%s :%s", acptr->name, mypath);
	}
	/*
	 * * Tell the victim she/he has been zapped, but *only* if * the
	 * victim is on current server--no sense in sending the *
	 * notification chasing the above kill, it won't get far * anyway
	 * (as this user don't exist there any more either)
	 */
	if (MyConnect(acptr)) {
	    sendto_one(acptr, ":%C %s %s :%s", sptr, MSG_KILL, acptr->name, mypath);
	    sendto_service(SERVICE_SEE_KILLS, 0, sptr, NULL, TOK1_KILL,
			   "%s :%s", acptr->name, mypath);
	}

	/*
	 * * 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...
	 */
	logevent_call(LogSys.operevent, MSG_KILL, sptr, &parv, parc);
	if (MyConnect(acptr) && MyConnect(sptr) && IsAnOper(sptr))
	    ircsprintf(buf2, "Local kill by %s (%s)", sptr->name, BadPtr(parv[2])
			      ? sptr->name : parv[2]);
	else {
	    killer = strchr(mypath, '(');
	    if (killer == NULL)
		killer = "()";
	    ircsprintf(buf2, "Killed (%s %s)", sptr->name, killer);
	}
	exit_client(acptr, sptr, buf2);
    }
    return 0;
}

/*
 * * m_kill * parv[0] = sender prefix *       parv[1] = kill victim *
 * parv[2] = kill path
 */
int s_kill(aClient *cptr, aClient *sptr, int parc, char *parv[])
{
    aClient *acptr;
    char *user, *path, *killer, *p, *nick;
    char mypath[KILLLEN + 1];
    int chasing = 0, kcount = 0;

    if (parc < 2 || *parv[1] == '\0') 
	return 0;

    user = parv[1];
    path = parv[2];		/*
				 * Either defined or NULL (parc >= 2!!)
				 */
    if (path == NULL)
	path = ")";

    if (MyClient(sptr))
	user = canonize(user);
    for (p = NULL, nick = strtoken(&p, user, ","); nick; nick = strtoken(&p, NULL, ",")) {
	chasing = 0;
	if (!(acptr = find_client(nick))) {
	    /*
	     * * If the user has recently changed nick, we automaticly *
	     * rewrite the KILL for this new nickname--this keeps *
	     * servers in synch when nick change and kill collide
	     */
	    if (!(acptr = get_history(nick, (long)
				      KILLCHASETIMELIMIT))) {
		return 0;
	    }
	    chasing = 1;
	}

	if (IsServer(acptr) || IsMe(acptr)) 
	    continue;
	kcount++;
	if (!IsServer(sptr) && (kcount > MAXKILLS)) 
	    break;

	if (MyClient(sptr)) {
    char myname[HOSTLEN + 1], *s;
    int slen;
	    strlcpy_irc(myname, me.name, 80);
	    if ((s = index(myname, '.')))
		*s = 0;
	    slen = KILLLEN - (strlen(sptr->name) + 6 + strlen(myname) + 8);
	    if (slen < 0)
		slen = 0;
	    if (strlen(path) > slen)
		path[slen] = '\0';
	    ircsprintf(mypath, "%s!ircops!%s (%s)", myname, sptr->name, path);
	    mypath[KILLLEN] = '\0';
	} else
	    strlcpy_irc(mypath, path, KILLLEN);
	/*
	 * * Notify all *local* opers about the KILL, this includes the
	 * one * originating the kill, if from this server--the special
	 * numeric * reply message is not generated anymore. *
	 * 
	 * Note: "acptr->name" is used instead of "user" because we may 
	 * have changed the target because of the nickname change.
	 */

	sendto_lev(SKILL_LEV,
		       "Received KILL message for %^C. From %C Path: %s", acptr, sptr, mypath);
	/*
	 * * 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(acptr) || !MyConnect(sptr) || !IsAnOper(sptr)) {
	    sendto_serv_butone(cptr, sptr, TOK1_KILL, "%~C :%s", acptr, mypath);
	    if (chasing && IsServer(cptr))
		sendto_one_server(cptr, &me, TOK1_KILL, "%~C :%s", acptr, mypath);
	    acptr->flags |= FLAGS_KILLED;
	    sendto_service(SERVICE_SEE_KILLS, 0, sptr, NULL, TOK1_KILL,
			   "%s :%s", acptr->name, mypath);
	}
	/*
	 * * Tell the victim she/he has been zapped, but *only* if * the
	 * victim is on current server--no sense in sending the *
	 * notification chasing the above kill, it won't get far * anyway
	 * (as this user don't exist there any more either)
	 */
	if (MyConnect(acptr)) {
	    sendto_one(acptr, ":%C %s %s :%s", sptr, MSG_KILL, acptr->name, mypath);
	    sendto_service(SERVICE_SEE_KILLS, 0, sptr, NULL, TOK1_KILL,
			   "%s :%s", acptr->name, mypath);
	}

	/*
	 * * 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...
	 */
	killer = strchr(mypath, '(');
	if (killer == NULL)
	    killer = "()";
	ircsprintf(buf2, "Killed (%s %s)", sptr->name, killer);
	exit_client(acptr, sptr, buf2);
    }
    return 0;
}