--- /dev/null
+/*
+ * 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_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> -- Now using assert in ircd_log.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 automatically
+ * 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
+ */
+ if (IsChannelService(victim))
+ 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 isn't on your server",
+ sptr, cli_name(victim));
+ return 0;
+ }
+ return do_kill(cptr, sptr, victim, cli_user(sptr)->host, cli_name(sptr),
+ msg);
+}
projects / ircu2.10.12-pk.git / blobdiff