/*
* IRC - Internet Relay Chat, ircd/m_kill.c
* Copyright (C) 1990 Jarkko Oikarinen and
* University of Oulu, Computing Center
*
* See file AUTHORS in IRC package for additional names of
* the programmers.
*
* 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.
*
* $Id: m_kill.c 1338 2005-10-03 10:19:15Z sirvulcan $
*/
/*
* m_functions execute protocol messages on this server:
*
* cptr is always NON-NULL, pointing to a *LOCAL* client
* structure (with an open socket connected!). This
* identifies the physical socket where the message
* originated (or which caused the m_function to be
* executed--some m_functions may call others...).
*
* sptr is the source of the message, defined by the
* prefix part of the message if present. If not
* or prefix not found, then sptr==cptr.
*
* (!IsServer(cptr)) => (cptr == sptr), because
* prefixes are taken *only* from servers...
*
* (IsServer(cptr))
* (sptr == cptr) => the message didn't
* have the prefix.
*
* (sptr != cptr && IsServer(sptr) means
* the prefix specified servername. (?)
*
* (sptr != cptr && !IsServer(sptr) means
* that message originated from a remote
* user (not local).
*
* combining
*
* (!IsServer(sptr)) means that, sptr can safely
* taken as defining the target structure of the
* message in this server.
*
* *Always* true (if 'parse' and others are working correct):
*
* 1) sptr->from == cptr (note: cptr->from == cptr)
*
* 2) MyConnect(sptr) <=> sptr == cptr (e.g. sptr
* *cannot* be a local connection, unless it's
* actually cptr!). [MyConnect(x) should probably
* be defined as (x == x->from) --msa ]
*
* parc number of variable parameter strings (if zero,
* parv is allowed to be NULL)
*
* parv a NULL terminated list of parameter pointers,
*
* parv[0], sender (prefix string), if not present
* this points to an empty string.
* parv[1]...parv[parc-1]
* pointers to additional parameters
* parv[parc] == NULL, *always*
*
* note: it is guaranteed that parv[0]..parv[parc-1] are all
* non-NULL pointers.
*/
#include "config.h"
#include "client.h"
#include "hash.h"
#include "ircd.h"
#include "ircd_features.h"
#include "ircd_log.h"
#include "ircd_reply.h"
#include "ircd_snprintf.h"
#include "ircd_string.h"
#include "msg.h"
#include "numeric.h"
#include "numnicks.h"
#include "s_misc.h"
#include "send.h"
#include "whowas.h"
#include <assert.h>
#include <string.h>
/*
* do_kill - Performs the generic work involved in killing a client
*
*/
static int do_kill(struct Client* cptr, struct Client* sptr,
struct Client* victim, char* inpath, char* path, char* msg)
{
assert(0 != cptr);
assert(0 != sptr);
assert(!IsServer(victim));
/*
* 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: "victim->name" is used instead of "user" because we may
* have changed the target because of the nickname change.
*/
sendto_opmask_butone(0, IsServer(sptr) ? SNO_SERVKILL : SNO_OPERKILL,
"Received KILL message for %s. From %s Path: %s!%s %s",
get_client_name(victim, SHOW_IP), cli_name(sptr),
inpath, path, msg);
log_write_kill(victim, sptr, inpath, path, msg);
/*
* 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.
* Client suicide kills are NOT passed on --SRB
*/
if (IsServer(cptr) || !MyConnect(victim)) {
sendcmdto_serv_butone(sptr, CMD_KILL, cptr, "%C :%s!%s %s", victim,
inpath, path, msg);
/*
* Set FLAG_KILLED. This prevents exit_one_client from sending
* the unnecessary QUIT for this. (This flag should never be
* set in any other place)
*/
SetFlag(victim, FLAG_KILLED);
}
/*
* 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)
* In accordance with the new hiding rules, the victim
* always sees the kill as coming from me.
*/
if (MyConnect(victim))
sendcmdto_one(feature_bool(FEAT_HIS_KILLWHO) ? &his : sptr, CMD_KILL,
victim, "%C :%s %s", victim, feature_bool(FEAT_HIS_KILLWHO)
? feature_str(FEAT_HIS_SERVERNAME) : cli_name(sptr), msg);
return exit_client_msg(cptr, victim, feature_bool(FEAT_HIS_KILLWHO)
? &me : sptr, "Killed (%s %s)",
feature_bool(FEAT_HIS_KILLWHO) ?
feature_str(FEAT_HIS_SERVERNAME) : cli_name(sptr),
msg);
}
/*
* ms_kill - server message handler
*
* NOTE: IsServer(cptr) == true;
*
* parv[0] = sender prefix
* parv[1] = kill victim
* parv[parc-1] = kill path
*/
int ms_kill(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
struct Client* victim;
char* path;
char* msg;
assert(0 != cptr);
assert(0 != sptr);
assert(IsServer(cptr));
/*
* XXX - a server sending less than 3 params could really desync
* things
*/
if (parc < 3) {
protocol_violation(sptr,"Too few arguments for KILL");
return need_more_params(sptr, "KILL");
}
path = parv[parc - 1]; /* Either defined or NULL (parc >= 3) */
if (!(msg = strchr(path, ' '))) /* Extract out the message */
msg = "(No reason supplied)";
else
*(msg++) = '\0'; /* Remove first character (space) and terminate path */
if (!(victim = findNUser(parv[1]))) {
if (IsUser(sptr))
sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :KILL target disconnected "
"before I got him :(", sptr);
return 0;
}
/*
* We *can* have crossed a NICK with this numeric... --Run
*
* Note the following situation:
* KILL SAA --> X
* <-- S NICK ... SAA | <-- SAA QUIT <-- S NICK ... SAA <-- SQUIT S
* Where the KILL reaches point X before the QUIT does.
* This would then *still* cause an orphan because the KILL doesn't reach S
* (because of the SQUIT), the QUIT is ignored (because of the KILL)
* and the second NICK ... SAA causes an orphan on the server at the
* right (which then isn't removed when the SQUIT arrives).
* Therefore we still need to detect numeric nick collisions too.
*
* Bounce the kill back to the originator, if the client can't be found
* by the next hop (short lag) the bounce won't propagate further.
*/
if (MyConnect(victim)) {
sendcmdto_one(&me, CMD_KILL, cptr, "%C :%s (Ghost 5 Numeric Collided)",
victim, path);
}
return do_kill(cptr, sptr, victim, cli_name(cptr), path, msg);
}
/*
* mo_kill - oper message handler
*
* NOTE: IsPrivileged(sptr), IsAnOper(sptr) == true
* IsServer(cptr), IsServer(sptr) == false
*
* parv[0] = sender prefix
* parv[1] = kill victim
* parv[parc-1] = kill path
*/
int mo_kill(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
struct Client* victim;
char* user;
char msg[TOPICLEN + 3]; /* (, ), and \0 */
assert(0 != cptr);
assert(0 != sptr);
/*
* oper connection to this server, cptr is always sptr
*/
assert(cptr == sptr);
assert(IsAnOper(sptr));
if (parc < 3 || EmptyString(parv[parc - 1]))
return need_more_params(sptr, "KILL");
user = parv[1];
ircd_snprintf(0, msg, sizeof(msg), "(%.*s)", TOPICLEN, parv[parc - 1]);
if (!(victim = FindClient(user))) {
/*
* 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 (!(victim = get_history(user, (long)15)))
return send_reply(sptr, ERR_NOSUCHNICK, user);
sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Changed KILL %s into %s", sptr,
user, cli_name(victim));
}
if (!HasPriv(sptr, MyConnect(victim) ? PRIV_LOCAL_KILL : PRIV_KILL))
return send_reply(sptr, ERR_NOPRIVILEGES);
if (IsServer(victim) || IsMe(victim)) {
return send_reply(sptr, ERR_CANTKILLSERVER);
}
/*
* if the user is +k, prevent a kill from local user
*/
/*
* ASUKA_X:
* Allow +X'ed users to kill +k'ed, but not U-lined services.
* --Bigfoot
*/
if (IsChannelService(victim) && IsService(cli_user(victim)->server))
return send_reply(sptr, ERR_ISREALSERVICE, "KILL", cli_name(victim));
if (IsChannelService(victim) && !IsXtraOp(sptr) && !(victim==sptr))
return send_reply(sptr, ERR_ISCHANSERVICE, "KILL", cli_name(victim));
if (!MyConnect(victim) && !HasPriv(sptr, PRIV_KILL)) {
sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Nick %s isnt on your server",
sptr, cli_name(victim));
return 0;
}
return do_kill(cptr, sptr, victim, cli_user(sptr)->host, cli_name(sptr),
msg);
}
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