303 lines
10 KiB
C
303 lines
10 KiB
C
/*
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* IRC - Internet Relay Chat, ircd/m_kill.c
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* Copyright (C) 1990 Jarkko Oikarinen and
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* University of Oulu, Computing Center
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*
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* See file AUTHORS in IRC package for additional names of
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* the programmers.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 1, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Id: m_kill.c 1876 2008-09-07 02:10:22Z isomer $
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*/
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/*
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* m_functions execute protocol messages on this server:
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*
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* cptr is always NON-NULL, pointing to a *LOCAL* client
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* structure (with an open socket connected!). This
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* identifies the physical socket where the message
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* originated (or which caused the m_function to be
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* executed--some m_functions may call others...).
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*
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* sptr is the source of the message, defined by the
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* prefix part of the message if present. If not
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* or prefix not found, then sptr==cptr.
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*
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* (!IsServer(cptr)) => (cptr == sptr), because
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* prefixes are taken *only* from servers...
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*
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* (IsServer(cptr))
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* (sptr == cptr) => the message didn't
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* have the prefix.
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*
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* (sptr != cptr && IsServer(sptr) means
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* the prefix specified servername. (?)
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*
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* (sptr != cptr && !IsServer(sptr) means
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* that message originated from a remote
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* user (not local).
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*
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* combining
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*
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* (!IsServer(sptr)) means that, sptr can safely
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* taken as defining the target structure of the
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* message in this server.
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*
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* *Always* true (if 'parse' and others are working correct):
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*
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* 1) sptr->from == cptr (note: cptr->from == cptr)
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*
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* 2) MyConnect(sptr) <=> sptr == cptr (e.g. sptr
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* *cannot* be a local connection, unless it's
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* actually cptr!). [MyConnect(x) should probably
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* be defined as (x == x->from) --msa ]
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*
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* parc number of variable parameter strings (if zero,
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* parv is allowed to be NULL)
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*
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* parv a NULL terminated list of parameter pointers,
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*
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* parv[0], sender (prefix string), if not present
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* this points to an empty string.
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* parv[1]...parv[parc-1]
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* pointers to additional parameters
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* parv[parc] == NULL, *always*
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*
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* note: it is guaranteed that parv[0]..parv[parc-1] are all
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* non-NULL pointers.
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*/
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#include "config.h"
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#include "client.h"
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#include "hash.h"
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#include "ircd.h"
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#include "ircd_features.h"
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#include "ircd_log.h"
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#include "ircd_reply.h"
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#include "ircd_snprintf.h"
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#include "ircd_string.h"
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#include "msg.h"
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#include "numeric.h"
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#include "numnicks.h"
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#include "s_misc.h"
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#include "send.h"
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#include "whowas.h"
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/* #include <assert.h> -- Now using assert in ircd_log.h */
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#include <string.h>
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/*
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* do_kill - Performs the generic work involved in killing a client
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*
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*/
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static int do_kill(struct Client* cptr, struct Client* sptr,
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struct Client* victim, char* inpath, char* path, char* msg)
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{
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assert(0 != cptr);
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assert(0 != sptr);
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assert(!IsServer(victim));
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/*
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* Notify all *local* opers about the KILL (this includes the one
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* originating the kill, if from this server--the special numeric
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* reply message is not generated anymore).
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*
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* Note: "victim->name" is used instead of "user" because we may
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* have changed the target because of the nickname change.
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*
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* Pentru stealth oper (IsHideOper), ascunde nickname-ul în mesaj
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*/
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sendto_opmask_butone(0, IsServer(sptr) ? SNO_SERVKILL : SNO_OPERKILL,
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"Received KILL message for %s from %s Path: %s!%s %s",
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get_client_name(victim, SHOW_IP),
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IsHideOper(sptr) ? feature_str(FEAT_HIS_SERVERNAME) : cli_name(sptr),
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inpath, path, msg);
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log_write_kill(victim, sptr, inpath, path, msg);
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/*
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* And pass on the message to other servers. Note, that if KILL
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* was changed, the message has to be sent to all links, also
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* back.
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* Client suicide kills are NOT passed on --SRB
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*/
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if (IsServer(cptr) || !MyConnect(victim)) {
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sendcmdto_serv_butone(sptr, CMD_KILL, cptr, "%C :%s!%s %s", victim,
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inpath, path, msg);
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/*
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* Set FLAG_KILLED. This prevents exit_one_client from sending
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* the unnecessary QUIT for this. (This flag should never be
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* set in any other place)
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*/
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SetFlag(victim, FLAG_KILLED);
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}
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/*
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* Tell the victim she/he has been zapped, but *only* if
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* the victim is on current server--no sense in sending the
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* notification chasing the above kill, it won't get far
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* anyway (as this user don't exist there any more either)
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* In accordance with the new hiding rules, the victim
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* always sees the kill as coming from me.
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* Pentru stealth oper (IsHideOper), ascunde nickname-ul
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*/
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if (MyConnect(victim)) {
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int hide_killer = feature_bool(FEAT_HIS_KILLWHO) || IsHideOper(sptr);
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sendcmdto_one(hide_killer ? &his : sptr, CMD_KILL,
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victim, "%C :%s %s", victim, hide_killer
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? feature_str(FEAT_HIS_SERVERNAME) : cli_name(sptr), msg);
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}
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/* Exit message - ascunde nickname pentru stealth oper */
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int hide_killer = feature_bool(FEAT_HIS_KILLWHO) || IsHideOper(sptr);
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return exit_client_msg(cptr, victim, hide_killer
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? &me : sptr, "Killed (%s %s)",
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hide_killer ?
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feature_str(FEAT_HIS_SERVERNAME) : cli_name(sptr),
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msg);
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}
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/*
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* ms_kill - server message handler
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*
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* NOTE: IsServer(cptr) == true;
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*
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* parv[0] = sender prefix
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* parv[1] = kill victim
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* parv[parc-1] = kill path
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*/
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int ms_kill(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
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{
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struct Client* victim;
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char* path;
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char* msg;
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assert(0 != cptr);
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assert(0 != sptr);
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assert(IsServer(cptr));
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/*
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* XXX - a server sending less than 3 params could really desync
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* things
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*/
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if (parc < 3) {
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protocol_violation(sptr,"Too few arguments for KILL");
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return need_more_params(sptr, "KILL");
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}
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path = parv[parc - 1]; /* Either defined or NULL (parc >= 3) */
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if (!(msg = strchr(path, ' '))) /* Extract out the message */
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msg = "(No reason supplied)";
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else
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*(msg++) = '\0'; /* Remove first character (space) and terminate path */
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if (!(victim = findNUser(parv[1]))) {
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if (IsUser(sptr))
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sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :KILL target disconnected "
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"before I got him :(", sptr);
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return 0;
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}
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/*
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* We *can* have crossed a NICK with this numeric... --Run
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*
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* Note the following situation:
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* KILL SAA --> X
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* <-- S NICK ... SAA | <-- SAA QUIT <-- S NICK ... SAA <-- SQUIT S
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* Where the KILL reaches point X before the QUIT does.
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* This would then *still* cause an orphan because the KILL doesn't reach S
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* (because of the SQUIT), the QUIT is ignored (because of the KILL)
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* and the second NICK ... SAA causes an orphan on the server at the
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* right (which then isn't removed when the SQUIT arrives).
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* Therefore we still need to detect numeric nick collisions too.
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*
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* Bounce the kill back to the originator, if the client can't be found
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* by the next hop (short lag) the bounce won't propagate further.
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*/
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if (MyConnect(victim)) {
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sendcmdto_one(&me, CMD_KILL, cptr, "%C :%s (Ghost 5 Numeric Collided)",
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victim, path);
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}
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return do_kill(cptr, sptr, victim, cli_name(cptr), path, msg);
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}
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/*
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* mo_kill - oper message handler
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*
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* NOTE: IsPrivileged(sptr), IsAnOper(sptr) == true
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* IsServer(cptr), IsServer(sptr) == false
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*
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* parv[0] = sender prefix
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* parv[1] = kill victim
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* parv[parc-1] = kill path
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*/
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int mo_kill(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
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{
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struct Client* victim;
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char* user;
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char msg[TOPICLEN + 3]; /* (, ), and \0 */
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assert(0 != cptr);
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assert(0 != sptr);
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/*
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* oper connection to this server, cptr is always sptr
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*/
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assert(cptr == sptr);
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assert(IsAnOper(sptr));
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if (parc < 3 || EmptyString(parv[parc - 1]))
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return need_more_params(sptr, "KILL");
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user = parv[1];
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ircd_snprintf(0, msg, sizeof(msg), "(%.*s)", TOPICLEN, parv[parc - 1]);
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if (!(victim = FindClient(user))) {
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/*
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* If the user has recently changed nick, we automatically
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* rewrite the KILL for this new nickname--this keeps
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* servers in synch when nick change and kill collide
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*/
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if (!(victim = get_history(user, (long)15)))
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return send_reply(sptr, ERR_NOSUCHNICK, user);
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sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Changed KILL %s into %s", sptr,
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user, cli_name(victim));
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}
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if (!HasPriv(sptr, MyConnect(victim) ? PRIV_LOCAL_KILL : PRIV_KILL))
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return send_reply(sptr, ERR_NOPRIVILEGES);
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if (IsServer(victim) || IsMe(victim)) {
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return send_reply(sptr, ERR_CANTKILLSERVER);
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}
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/*
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* if the user is +k, prevent a kill from local user
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*/
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if (IsChannelService(victim) && IsService(cli_user(victim)->server))
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return send_reply(sptr, ERR_ISCHANSERVICE, "KILL", cli_name(victim), "a network service");
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if (IsChannelService(victim) && !IsXtraOp(sptr) && (victim!=sptr))
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return send_reply(sptr, ERR_ISCHANSERVICE, "KILL", cli_name(victim), "an IRC operator");
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if (!MyConnect(victim) && !HasPriv(sptr, PRIV_KILL)) {
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sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Nick %s isn't on your server",
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sptr, cli_name(victim));
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return 0;
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}
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return do_kill(cptr, sptr, victim, cli_user(sptr)->host, cli_name(sptr),
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msg);
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}
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