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
88 #include "ircd_reply.h"
89 #include "ircd_snprintf.h"
90 #include "ircd_string.h"
102 * ms_kill - server message handler template
104 * NOTE: IsServer(cptr) == true;
106 * parv[0] = sender prefix
107 * parv[1] = kill victim
108 * parv[parc-1] = kill path
110 int ms_kill(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
112 struct Client* victim;
121 assert(IsServer(cptr));
124 * XXX - a server sending less than 3 params could really desync
128 protocol_violation(sptr,"Too few arguments for KILL");
129 return need_more_params(sptr, "KILL");
133 path = parv[parc - 1]; /* Either defined or NULL (parc >= 3) */
135 if (!(victim = findNUser(parv[1]))) {
137 sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :KILL target disconnected "
138 "before I got him :(", sptr);
143 * Notify all *local* opers about the KILL (this includes the one
144 * originating the kill, if from this server--the special numeric
145 * reply message is not generated anymore).
147 * Note: "victim->name" is used instead of "user" because we may
148 * have changed the target because of the nickname change.
150 inpath = cli_name(cptr);
152 sendto_opmask_butone(0, IsServer(sptr) ? SNO_SERVKILL : SNO_OPERKILL,
153 "Received KILL message for %s. From %s Path: %C!%s",
154 get_client_name(victim,SHOW_IP), parv[0], cptr, path);
156 log_write_kill(victim, sptr, cli_name(cptr), path);
158 * And pass on the message to other servers. Note, that if KILL
159 * was changed, the message has to be sent to all links, also
162 sendcmdto_serv_butone(sptr, CMD_KILL, cptr, "%C :%s!%s", victim, cli_name(cptr),
165 * We *can* have crossed a NICK with this numeric... --Run
167 * Note the following situation:
169 * <-- S NICK ... SAA | <-- SAA QUIT <-- S NICK ... SAA <-- SQUIT S
170 * Where the KILL reaches point X before the QUIT does.
171 * This would then *still* cause an orphan because the KILL doesn't reach S
172 * (because of the SQUIT), the QUIT is ignored (because of the KILL)
173 * and the second NICK ... SAA causes an orphan on the server at the
174 * right (which then isn't removed when the SQUIT arrives).
175 * Therefore we still need to detect numeric nick collisions too.
177 * Bounce the kill back to the originator, if the client can't be found
178 * by the next hop (short lag) the bounce won't propagate further.
180 if (MyConnect(victim))
181 sendcmdto_one(&me, CMD_KILL, cptr, "%C :%s!%s (Ghost 5 Numeric Collided)",
182 victim, cli_name(cptr), path);
184 * Set FLAGS_KILLED. This prevents exit_one_client from sending
185 * the unnecessary QUIT for this. (This flag should never be
186 * set in any other place)
188 cli_flags(victim) |= FLAGS_KILLED;
191 * the first space in path will be at the end of the
193 * bla.bla.bla!host.net.dom!opername (comment)
195 if (!(comment = strchr(path, ' ')))
196 comment = " (No reason given)";
198 * Tell the victim she/he has been zapped, but *only* if
199 * the victim is on current server--no sense in sending the
200 * notification chasing the above kill, it won't get far
201 * anyway (as this user don't exist there any more either)
203 if (MyConnect(victim))
204 sendcmdto_one(IsServer(sptr) ? &me : sptr, CMD_KILL, victim,
205 "%C :%s!%s", victim, IsServer(sptr) ? "*.undernet.org" :
206 cli_name(sptr), comment);
208 ircd_snprintf(0, buf, sizeof(buf), "Killed (%s%s)", IsServer(sptr) ?
209 "*.undernet.org" : cli_name(sptr), comment);
211 return exit_client(cptr, victim, sptr, buf);
215 * mo_kill - oper message handler template
217 * NOTE: IsPrivileged(sptr), IsAnOper(sptr) == true
218 * IsServer(cptr), IsServer(sptr) == false
220 * parv[0] = sender prefix
221 * parv[1] = kill victim
222 * parv[parc-1] = kill path
224 int mo_kill(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
226 struct Client* victim;
236 * oper connection to this server, cptr is always sptr
238 assert(cptr == sptr);
239 assert(IsAnOper(sptr));
241 if (parc < 3 || EmptyString(parv[parc - 1]))
242 return need_more_params(sptr, "KILL");
245 if (!(victim = FindClient(user))) {
247 * If the user has recently changed nick, we automaticly
248 * rewrite the KILL for this new nickname--this keeps
249 * servers in synch when nick change and kill collide
251 if (!(victim = get_history(user, (long)15)))
252 return send_reply(sptr, ERR_NOSUCHNICK, user);
254 sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Changed KILL %s into %s", sptr,
255 user, cli_name(victim));
257 if (!HasPriv(sptr, MyConnect(victim) ? PRIV_LOCAL_KILL : PRIV_KILL))
258 return send_reply(sptr, ERR_NOPRIVILEGES);
260 if (IsServer(victim) || IsMe(victim)) {
261 return send_reply(sptr, ERR_CANTKILLSERVER);
264 * if the user is +k, prevent a kill from local user
266 if (IsChannelService(victim))
267 return send_reply(sptr, ERR_ISCHANSERVICE, "KILL", cli_name(victim));
270 if (!MyConnect(victim) && !HasPriv(sptr, PRIV_KILL)) {
271 sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :Nick %s isnt on your server",
272 sptr, cli_name(victim));
277 * The kill originates from this server, initialize path.
278 * (In which case the 'path' may contain user suplied
279 * explanation ...or some nasty comment, sigh... >;-)
282 * ...!operhost!oper (comment)
285 comment = parv[parc - 1]; /* Either defined or NULL (parc >= 3) */
287 if (strlen(comment) > TOPICLEN)
288 comment[TOPICLEN] = '\0';
290 inpath = cli_user(sptr)->host;
292 ircd_snprintf(0, buf, sizeof(buf), "%s (%s)", cli_name(cptr), comment);
296 * Notify all *local* opers about the KILL (this includes the one
297 * originating the kill, if from this server--the special numeric
298 * reply message is not generated anymore).
300 * Note: "victim->name" is used instead of "user" because we may
301 * have changed the target because of the nickname change.
303 sendto_opmask_butone(0, SNO_OPERKILL,
304 "Received KILL message for %s. From %s Path: %s!%s",
305 get_client_name(victim,SHOW_IP), parv[0], inpath, path);
307 log_write_kill(victim, sptr, inpath, path);
309 * And pass on the message to other servers. Note, that if KILL
310 * was changed, the message has to be sent to all links, also
312 * Suicide kills are NOT passed on --SRB
314 if (!MyConnect(victim)) {
315 sendcmdto_serv_butone(sptr, CMD_KILL, cptr, "%C :%s!%s", victim, inpath,
319 * Set FLAGS_KILLED. This prevents exit_one_client from sending
320 * the unnecessary QUIT for this. (This flag should never be
321 * set in any other place)
323 cli_flags(victim) |= FLAGS_KILLED;
328 * Tell the victim she/he has been zapped, but *only* if
329 * the victim is on current server--no sense in sending the
330 * notification chasing the above kill, it won't get far
331 * anyway (as this user don't exist there any more either)
333 sendcmdto_one(sptr, CMD_KILL, victim, "%C :%s", victim, path);
336 ircd_snprintf(0, buf, sizeof(buf), "Killed (%s (%s))", cli_name(sptr),
339 return exit_client(cptr, victim, sptr, buf);