/*
  *   Unreal Internet Relay Chat Daemon, src/modules/kill.c
  *   (C) 2000-2001 Carsten V. Munk and the UnrealIRCd Team
  *   Moved to modules by Fish (Justin Hammond)
  *
  *   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 1, 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 "unrealircd.h"
 
 CMD_FUNC(cmd_kill);
 
 ModuleHeader MOD_HEADER
   = {
 	"kill",
 	"5.0",
 	"command /kill",
 	"UnrealIRCd Team",
 	"unrealircd-6",
     };
 
 MOD_INIT()
 {
 	CommandAdd(modinfo->handle, "KILL", cmd_kill, 2, CMD_USER|CMD_SERVER);
 	MARK_AS_OFFICIAL_MODULE(modinfo);
 	return MOD_SUCCESS;
 }
 
 MOD_LOAD()
 {
 	return MOD_SUCCESS;
 }
 
 MOD_UNLOAD()
 {
 	return MOD_SUCCESS;
 }
 
 
 /** The KILL command - this forcefully terminates a users' connection.
  * parv[1] = kill victim(s) - comma separated list
  * parv[2] = reason
  */
 CMD_FUNC(cmd_kill)
 {
 	char targetlist[BUFSIZE];
 	char reason[BUFSIZE];
 	char buf2[BUFSIZE];
 	char *str;
 	char *nick, *save = NULL;
 	Client *target;
 	Hook *h;
 	int ntargets = 0;
 	int maxtargets = max_targets_for_command("KILL");
 
 	if ((parc < 3) || BadPtr(parv[2]))
 	{
 		sendnumeric(client, ERR_NEEDMOREPARAMS, "KILL");
 		return;
 	}
 
 	if (!IsServer(client->direction) && !ValidatePermissionsForPath("kill:global",client,NULL,NULL,NULL) && !ValidatePermissionsForPath("kill:local",client,NULL,NULL,NULL))
 	{
 		sendnumeric(client, ERR_NOPRIVILEGES);
 		return;
 	}
 
 	if (MyUser(client))
 		strlcpy(targetlist, canonize(parv[1]), sizeof(targetlist));
 	else
 		strlcpy(targetlist, parv[1], sizeof(targetlist));
 
 	strlncpy(reason, parv[2], sizeof(reason), iConf.quit_length);
 
 	for (nick = strtoken(&save, targetlist, ","); nick; nick = strtoken(&save, NULL, ","))
 	{
 		MessageTag *mtags = NULL;
 
 		if (MyUser(client) && (++ntargets > maxtargets))
 		{
 			sendnumeric(client, ERR_TOOMANYTARGETS, nick, maxtargets, "KILL");
 			break;
 		}
 
 		target = find_user(nick, NULL);
 
 		/* If a local user issued the /KILL then we will "chase" the user.
 		 * In other words: we'll check the history for recently changed nicks.
 		 * We don't do this for remote KILL requests as we have UID for that.
 		 */
 		if (!target && MyUser(client))
 		{
 			target = get_history(nick, KILLCHASETIMELIMIT);
 			if (target)
 				sendnotice(client, "*** KILL changed from %s to %s", nick, target->name);
 		}
 
 		if (!target)
 		{
 			sendnumeric(client, ERR_NOSUCHNICK, nick);
 			continue;
 		}
 
 		if ((!MyConnect(target) && MyUser(client) && !ValidatePermissionsForPath("kill:global",client,target,NULL,NULL))
 		    || (MyConnect(target) && MyUser(client)
 		    && !ValidatePermissionsForPath("kill:local",client,target,NULL,NULL)))
 		{
 			sendnumeric(client, ERR_NOPRIVILEGES);
 			continue;
 		}
 
 		/* Hooks can plug-in here to reject a kill */
 		if (MyUser(client))
 		{
 			int ret = EX_ALLOW;
 			for (h = Hooks[HOOKTYPE_PRE_KILL]; h; h = h->next)
 			{
 				/* note: parameters are: client, victim, reason. reason can be NULL !! */
 				ret = (*(h->func.intfunc))(client, target, reason);
 				if (ret != EX_ALLOW)
 					break;
 			}
 			if ((ret == EX_DENY) || (ret == EX_ALWAYS_DENY))
 				continue; /* reject kill for this particular user */
 		}
 
 		/* From here on, the kill is probably going to be successful. */
 
 		unreal_log(ULOG_INFO, "kill", "KILL_COMMAND", client,
 		           "Client killed: $target.details [by: $client] ($reason)",
 		           log_data_client("target", target),
 		           log_data_string("reason", reason));
 
 		new_message(client, recv_mtags, &mtags);
 
 		/* Victim gets a little notification (s)he is about to die */
 		if (MyConnect(target))
 		{
 			sendto_prefix_one(target, client, NULL, ":%s KILL %s :%s",
 			    client->name, target->name, reason);
 		}
 
 		if (MyConnect(target) && MyConnect(client))
 		{
 			/* Local kill. This is handled as if it were a QUIT */
 		}
 		else
 		{
 			/* Kill from one server to another (we may be src, victim or something in-between) */
 
 			/* Broadcast it to other servers */
 			sendto_server(client, 0, 0, mtags, ":%s KILL %s :%s",
 			              client->id, target->id, reason);
 
 			/* Don't send a QUIT for this */
 			SetKilled(target);
 
 			ircsnprintf(buf2, sizeof(buf2), "Killed by %s (%s)", client->name, reason);
 		}
 
 		if (MyUser(client))
 			RunHook(HOOKTYPE_LOCAL_KILL, client, target, reason);
 
 		ircsnprintf(buf2, sizeof(buf2), "Killed by %s (%s)", client->name, reason);
 		exit_client(target, mtags, buf2);
 
 		free_message_tags(mtags);
 
 		if (IsDead(client))
 			return; /* stop processing if we killed ourselves */
 	}
 }

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