2 * IRC - Internet Relay Chat, ircd/m_kill.c
3 * Copyright (C) 1990 Jarkko Oikarinen and
4 * University of Oulu, Computing Center
6 * See file AUTHORS in IRC package for additional names of
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 1, or (at your option)
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 * m_functions execute protocol messages on this server:
29 * cptr is always NON-NULL, pointing to a *LOCAL* client
30 * structure (with an open socket connected!). This
31 * identifies the physical socket where the message
32 * originated (or which caused the m_function to be
33 * executed--some m_functions may call others...).
35 * sptr is the source of the message, defined by the
36 * prefix part of the message if present. If not
37 * or prefix not found, then sptr==cptr.
39 * (!IsServer(cptr)) => (cptr == sptr), because
40 * prefixes are taken *only* from servers...
43 * (sptr == cptr) => the message didn't
46 * (sptr != cptr && IsServer(sptr) means
47 * the prefix specified servername. (?)
49 * (sptr != cptr && !IsServer(sptr) means
50 * that message originated from a remote
55 * (!IsServer(sptr)) means that, sptr can safely
56 * taken as defining the target structure of the
57 * message in this server.
59 * *Always* true (if 'parse' and others are working correct):
61 * 1) sptr->from == cptr (note: cptr->from == cptr)
63 * 2) MyConnect(sptr) <=> sptr == cptr (e.g. sptr
64 * *cannot* be a local connection, unless it's
65 * actually cptr!). [MyConnect(x) should probably
66 * be defined as (x == x->from) --msa ]
68 * parc number of variable parameter strings (if zero,
69 * parv is allowed to be NULL)
71 * parv a NULL terminated list of parameter pointers,
73 * parv[0], sender (prefix string), if not present
74 * this points to an empty string.
75 * parv[1]...parv[parc-1]
76 * pointers to additional parameters
77 * parv[parc] == NULL, *always*
79 * note: it is guaranteed that parv[0]..parv[parc-1] are all
87 #include "ircd_features.h"
89 #include "ircd_reply.h"
90 #include "ircd_snprintf.h"
91 #include "ircd_string.h"
103 * do_kill - Performs the generic work involved in killing a client
106 static int do_kill(struct Client* cptr, struct Client* sptr,
107 struct Client* victim, char* inpath, char* path, char* msg)
111 assert(!IsServer(victim));
114 * Notify all *local* opers about the KILL (this includes the one
115 * originating the kill, if from this server--the special numeric
116 * reply message is not generated anymore).
118 * Note: "victim->name" is used instead of "user" because we may
119 * have changed the target because of the nickname change.
121 sendto_opmask_butone(0, IsServer(sptr) ? SNO_SERVKILL : SNO_OPERKILL,
122 "Received KILL message for %s. From %s Path: %s!%s %s",
123 get_client_name(victim, SHOW_IP), cli_name(sptr),
125 log_write_kill(victim, sptr, inpath, path, msg);
128 * And pass on the message to other servers. Note, that if KILL
129 * was changed, the message has to be sent to all links, also
131 * Client suicide kills are NOT passed on --SRB
133 if (IsServer(cptr) || !MyConnect(victim)) {
134 sendcmdto_serv_butone(sptr, CMD_KILL, cptr, "%C :%s!%s %s", victim,
138 * Set FLAG_KILLED. This prevents exit_one_client from sending
139 * the unnecessary QUIT for this. (This flag should never be
140 * set in any other place)
142 SetFlag(victim, FLAG_KILLED);
146 * Tell the victim she/he has been zapped, but *only* if
147 * the victim is on current server--no sense in sending the
148 * notification chasing the above kill, it won't get far
149 * anyway (as this user don't exist there any more either)
150 * In accordance with the new hiding rules, the victim
151 * always sees the kill as coming from me.
153 if (MyConnect(victim))
154 sendcmdto_one(feature_bool(FEAT_HIS_KILLWHO) ? &me : sptr, CMD_KILL,
155 victim, "%C :%s %s", victim, feature_bool(FEAT_HIS_KILLWHO)
156 ? feature_str(FEAT_HIS_SERVERNAME) : cli_name(sptr), msg);
157 return exit_client_msg(cptr, victim, feature_bool(FEAT_HIS_KILLWHO)
158 ? &me : sptr, "Killed (%s %s)",
159 feature_bool(FEAT_HIS_KILLWHO) ?
160 feature_str(FEAT_HIS_SERVERNAME) : cli_name(sptr),
165 * ms_kill - server message handler template
167 * NOTE: IsServer(cptr) == true;
169 * parv[0] = sender prefix
170 * parv[1] = kill victim
171 * parv[parc-1] = kill path
173 int ms_kill(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
175 struct Client* victim;
181 assert(IsServer(cptr));
184 * XXX - a server sending less than 3 params could really desync
188 protocol_violation(sptr,"Too few arguments for KILL");
189 return need_more_params(sptr, "KILL");
192 path = parv[parc - 1]; /* Either defined or NULL (parc >= 3) */
194 if (!(msg = strchr(path, ' '))) /* Extract out the message */
195 msg = "(No reason supplied)";
197 *(msg++) = '\0'; /* Remove first character (space) and terminate path */
199 if (!(victim = findNUser(parv[1]))) {
201 sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :KILL target disconnected "
202 "before I got him :(", sptr);
207 * We *can* have crossed a NICK with this numeric... --Run
209 * Note the following situation:
211 * <-- S NICK ... SAA | <-- SAA QUIT <-- S NICK ... SAA <-- SQUIT S
212 * Where the KILL reaches point X before the QUIT does.
213 * This would then *still* cause an orphan because the KILL doesn't reach S
214 * (because of the SQUIT), the QUIT is ignored (because of the KILL)
215 * and the second NICK ... SAA causes an orphan on the server at the
216 * right (which then isn't removed when the SQUIT arrives).
217 * Therefore we still need to detect numeric nick collisions too.
219 * Bounce the kill back to the originator, if the client can't be found
220 * by the next hop (short lag) the bounce won't propagate further.
222 if (MyConnect(victim)) {
223 sendcmdto_one(&me, CMD_KILL, cptr, "%C :%s (Ghost 5 Numeric Collided)",
226 return do_kill(cptr, sptr, victim, cli_name(cptr), path, msg);
230 * mo_kill - oper message handler template
232 * NOTE: IsPrivileged(sptr), IsAnOper(sptr) == true
233 * IsServer(cptr), IsServer(sptr) == false
235 * parv[0] = sender prefix
236 * parv[1] = kill victim
237 * parv[parc-1] = kill path
239 int mo_kill(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
241 struct Client* victim;
243 char msg[TOPICLEN + 3]; /* (, ), and \0 */
248 * oper connection to this server, cptr is always sptr
250 assert(cptr == sptr);
251 assert(IsAnOper(sptr));
253 if (parc < 3 || EmptyString(parv[parc - 1]))
254 return need_more_params(sptr, "KILL");
257 ircd_snprintf(0, msg, sizeof(msg), "(%.*s)", TOPICLEN, parv[parc - 1]);
259 if (!(victim = FindClient(user))) {
261 * If the user has recently changed nick, we automaticly
262 * rewrite the KILL for this new nickname--this keeps
263 * servers in synch when nick change and kill collide
265 if (!(victim = get_history(user, (long)15)))
266 return send_reply(sptr, ERR_NOSUCHNICK, user);
268 sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Changed KILL %s into %s", sptr,
269 user, cli_name(victim));
271 if (!HasPriv(sptr, MyConnect(victim) ? PRIV_LOCAL_KILL : PRIV_KILL))
272 return send_reply(sptr, ERR_NOPRIVILEGES);
274 if (IsServer(victim) || IsMe(victim)) {
275 return send_reply(sptr, ERR_CANTKILLSERVER);
278 * if the user is +k, prevent a kill from local user
280 if (IsChannelService(victim))
281 return send_reply(sptr, ERR_ISCHANSERVICE, "KILL", cli_name(victim));
284 if (!MyConnect(victim) && !HasPriv(sptr, PRIV_KILL)) {
285 sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Nick %s isnt on your server",
286 sptr, cli_name(victim));
289 return do_kill(cptr, sptr, victim, cli_user(sptr)->host, cli_name(sptr),