2 * IRC - Internet Relay Chat, ircd/m_nick.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
84 * No need to include handlers.h here the signatures must match
85 * and we don't need to force a rebuild of all the handlers everytime
86 * we add a new one to the list. --Bleep
94 #include "ircd_chattr.h"
95 #include "ircd_reply.h"
96 #include "ircd_string.h"
110 * m_nick - message handler for local clients
111 * parv[0] = sender prefix
114 int m_nick(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
116 struct Client* acptr;
117 char nick[NICKLEN + 2];
120 const char* client_name;
123 assert(cptr == sptr);
126 * parv[0] will be empty for clients connecting for the first time
128 client_name = (*sptr->name) ? sptr->name : "*";
131 send_reply(sptr, ERR_NONICKNAMEGIVEN);
135 * Don't let them send make us send back a really long string of
139 if (strlen(arg) > NICKLEN)
142 if ((s = strchr(arg, '~')))
148 * If do_nick_name() returns a null name OR if the server sent a nick
149 * name and do_nick_name() changed it in some way (due to rules of nick
150 * creation) then reject it. If from a server and we reject it,
151 * and KILL it. -avalon 4/4/92
153 if (0 == do_nick_name(nick)) {
154 send_reply(sptr, ERR_ERRONEUSNICKNAME, arg);
159 * Check if this is a LOCAL user trying to use a reserved (Juped)
160 * nick, if so tell him that it's a nick in use...
162 if (isNickJuped(nick)) {
163 send_reply(sptr, ERR_NICKNAMEINUSE, nick);
164 return 0; /* NICK message ignored */
167 if (!(acptr = FindClient(nick))) {
169 * No collisions, all clear...
171 return set_nick_name(cptr, sptr, nick, parc, parv);
173 if (IsServer(acptr)) {
174 send_reply(sptr, ERR_NICKNAMEINUSE, nick);
175 return 0; /* NICK message ignored */
178 * If acptr == sptr, then we have a client doing a nick
179 * change between *equivalent* nicknames as far as server
180 * is concerned (user is changing the case of his/her
181 * nickname or somesuch)
185 * If acptr == sptr, then we have a client doing a nick
186 * change between *equivalent* nicknames as far as server
187 * is concerned (user is changing the case of his/her
188 * nickname or somesuch)
190 if (0 != strcmp(acptr->name, nick)) {
192 * Allows change of case in his/her nick
194 return set_nick_name(cptr, sptr, nick, parc, parv);
197 * This is just ':old NICK old' type thing.
198 * Just forget the whole thing here. There is
199 * no point forwarding it to anywhere,
200 * especially since servers prior to this
201 * version would treat it as nick collision.
206 * Note: From this point forward it can be assumed that
207 * acptr != sptr (point to different client structures).
209 assert(acptr != sptr);
211 * If the older one is "non-person", the new entry is just
212 * allowed to overwrite it. Just silently drop non-person,
213 * and proceed with the nick. This should take care of the
214 * "dormant nick" way of generating collisions...
216 * XXX - hmmm can this happen after one is registered?
218 if (IsUnknown(acptr) && MyConnect(acptr)) {
219 ++ServerStats->is_ref;
220 IPcheck_connect_fail(acptr->ip);
221 exit_client(cptr, acptr, &me, "Overridden by other sign on");
222 return set_nick_name(cptr, sptr, nick, parc, parv);
225 * NICK is coming from local client connection. Just
226 * send error reply and ignore the command.
228 send_reply(sptr, ERR_NICKNAMEINUSE, nick);
229 return 0; /* NICK message ignored */
234 * ms_nick - server message handler for nicks
235 * parv[0] = sender prefix
238 * If from server, source is client:
239 * parv[2] = timestamp
243 * parv[3] = timestamp
246 * parv[6] = umode (optional)
247 * parv[parc-3] = IP# <- Only Protocol >= 10
248 * parv[parc-2] = YXX, numeric nick <- Only Protocol >= 10
249 * parv[parc-1] = info
252 int ms_nick(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
254 struct Client* acptr;
255 char nick[NICKLEN + 2];
261 assert(IsServer(cptr));
263 if ((IsServer(sptr) && parc < 8) || parc < 3) {
264 sendto_opmask_butone(0, SNO_OLDSNO, "bad NICK param count for %s from %C",
266 return need_more_params(sptr, "NICK");
269 ircd_strncpy(nick, parv[1], NICKLEN);
270 nick[NICKLEN] = '\0';
272 if (!IsBurstOrBurstAck(sptr)) {
273 if (IsServer(sptr)) {
274 lastnick = atoi(parv[3]);
275 if (lastnick > OLDEST_TS)
276 sptr->serv->lag = TStime() - lastnick;
279 lastnick = atoi(parv[2]);
280 if (lastnick > OLDEST_TS)
281 sptr->user->server->serv->lag = TStime() - lastnick;
285 * If do_nick_name() returns a null name OR if the server sent a nick
286 * name and do_nick_name() changed it in some way (due to rules of nick
287 * creation) then reject it. If from a server and we reject it,
288 * and KILL it. -avalon 4/4/92
290 if (0 == do_nick_name(nick) || 0 != strcmp(nick, parv[1])) {
291 send_reply(sptr, ERR_ERRONEUSNICKNAME, parv[1]);
293 ++ServerStats->is_kill;
294 sendto_opmask_butone(0, SNO_OLDSNO, "Bad Nick: %s From: %s %C", parv[1],
296 sendcmdto_one(&me, CMD_KILL, cptr, "%s :%s (%s <- %s[%s])",
297 IsServer(sptr) ? parv[parc - 2] : parv[0], me.name, parv[1],
299 if (!IsServer(sptr)) {
303 sendcmdto_serv_butone(&me, CMD_KILL, 0, "%s :%s (%s <- %s!%s@%s)",
304 parv[0], me.name, cptr->name, parv[0],
305 sptr->user ? sptr->username : "",
306 sptr->user ? sptr->user->server->name :
312 * Check against nick name collisions.
314 * Put this 'if' here so that the nesting goes nicely on the screen :)
315 * We check against server name list before determining if the nickname
316 * is present in the nicklist (due to the way the below for loop is
317 * constructed). -avalon
319 if (!(acptr = FindClient(nick))) {
321 * No collisions, all clear...
323 return set_nick_name(cptr, sptr, nick, parc, parv);
327 if (IsServer(acptr)) {
329 * We have a nickname trying to use the same name as
330 * a server. Send out a nick collision KILL to remove
331 * the nickname. As long as only a KILL is sent out,
332 * there is no danger of the server being disconnected.
333 * Ultimate way to jupiter a nick ? >;-). -avalon
335 sendto_opmask_butone(0, SNO_OLDSNO, "Nick collision on %C(%C <- %C)", sptr,
337 ++ServerStats->is_kill;
339 sendcmdto_one(&me, CMD_KILL, cptr, "%C :%s (%s <- %s)", sptr, me.name,
340 acptr->from->name, cptr->name);
342 sptr->flags |= FLAGS_KILLED;
344 * if sptr is a server it is exited here, nothing else to do
346 return exit_client(cptr, sptr, &me, "Nick/Server collision");
350 * If acptr == sptr, then we have a client doing a nick
351 * change between *equivalent* nicknames as far as server
352 * is concerned (user is changing the case of his/her
353 * nickname or somesuch)
356 if (strcmp(acptr->name, nick) != 0)
358 * Allows change of case in his/her nick
360 return set_nick_name(cptr, sptr, nick, parc, parv);
363 * This is just ':old NICK old' type thing.
364 * Just forget the whole thing here. There is
365 * no point forwarding it to anywhere,
366 * especially since servers prior to this
367 * version would treat it as nick collision.
369 return 0; /* NICK Message ignored */
373 * Note: From this point forward it can be assumed that
374 * acptr != sptr (point to different client structures).
376 assert(acptr != sptr);
378 * If the older one is "non-person", the new entry is just
379 * allowed to overwrite it. Just silently drop non-person,
380 * and proceed with the nick. This should take care of the
381 * "dormant nick" way of generating collisions...
383 if (IsUnknown(acptr) && MyConnect(acptr)) {
384 ++ServerStats->is_ref;
385 IPcheck_connect_fail(acptr->ip);
386 exit_client(cptr, acptr, &me, "Overridden by other sign on");
387 return set_nick_name(cptr, sptr, nick, parc, parv);
390 * Decide, we really have a nick collision and deal with it
393 * NICK was coming from a server connection.
394 * This means we have a race condition (two users signing on
395 * at the same time), or two net fragments reconnecting with the same nick.
396 * The latter can happen because two different users connected
397 * or because one and the same user switched server during a net break.
398 * If the TimeStamps are equal, we kill both (or only 'new'
399 * if it was a ":server NICK new ...").
400 * Otherwise we kill the youngest when user@host differ,
401 * or the oldest when they are the same.
402 * We treat user and ~user as different, because if it wasn't
403 * a faked ~user the AUTH wouldn't have added the '~'.
407 if (IsServer(sptr)) {
409 * A new NICK being introduced by a neighbouring
410 * server (e.g. message type ":server NICK new ..." received)
412 * compare IP address and username
414 differ = (acptr->ip.s_addr != htonl(base64toint(parv[parc - 3]))) ||
415 (0 != ircd_strcmp(acptr->user->username, parv[4]));
416 sendto_opmask_butone(0, SNO_OLDSNO, "Nick collision on %C (%C %Tu <- "
417 "%C %Tu (%s user@host))", acptr, acptr->from,
418 acptr->lastnick, cptr, lastnick,
419 differ ? "Different" : "Same");
423 * A NICK change has collided (e.g. message type ":old NICK new").
425 * compare IP address and username
427 differ = (acptr->ip.s_addr != sptr->ip.s_addr) ||
428 (0 != ircd_strcmp(acptr->user->username, sptr->user->username));
429 sendto_opmask_butone(0, SNO_OLDSNO, "Nick change collision from %C to "
430 "%C (%C %Tu <- %C %Tu)", sptr, acptr, acptr->from,
431 acptr->lastnick, cptr, lastnick);
434 * Now remove (kill) the nick on our side if it is the youngest.
435 * If no timestamp was received, we ignore the incoming nick
436 * (and expect a KILL for our legit nick soon ):
437 * When the timestamps are equal we kill both nicks. --Run
438 * acptr->from != cptr should *always* be true (?).
440 * This exits the client sending the NICK message
442 if (acptr->from != cptr) {
443 if ((differ && lastnick >= acptr->lastnick) || (!differ && lastnick <= acptr->lastnick)) {
444 if (!IsServer(sptr)) {
445 ++ServerStats->is_kill;
446 sendcmdto_serv_butone(&me, CMD_KILL, sptr, "%C :%s (%s <- %s (Nick "
447 "collision))", sptr, me.name, acptr->from->name,
449 assert(!MyConnect(sptr));
455 sendto_one(cptr, "%s " TOK_KILL " %s%s :%s (Ghost 2)", /* XXX DEAD */
456 NumServ(&me), NumNick(sptr), me.name);
458 sptr->flags |= FLAGS_KILLED;
459 exit_client(cptr, sptr, &me, "Nick collision (you're a ghost)");
461 * we have killed sptr off, zero out it's pointer so if it's used
462 * again we'll know about it --Bleep
466 if (lastnick != acptr->lastnick)
467 return 0; /* Ignore the NICK */
469 send_reply(acptr, ERR_NICKCOLLISION, nick);
472 ++ServerStats->is_kill;
473 acptr->flags |= FLAGS_KILLED;
475 * This exits the client we had before getting the NICK message
478 sendcmdto_serv_butone(&me, CMD_KILL, acptr, "%C :%s (%s <- %s (older "
479 "nick overruled))", acptr, me.name,
480 acptr->from->name, cptr->name);
481 if (MyConnect(acptr))
482 sendcmdto_one(acptr, CMD_QUIT, cptr, ":Local kill by %s (Ghost)",
484 exit_client(cptr, acptr, &me, "Nick collision (older nick overruled)");
487 sendcmdto_serv_butone(&me, CMD_KILL, acptr, "%C :%s (%s <- %s (nick "
488 "collision from same user@host))", acptr, me.name,
489 acptr->from->name, cptr->name);
490 if (MyConnect(acptr))
491 sendcmdto_one(acptr, CMD_QUIT, cptr, ":Local kill by %s (Ghost: ",
492 "switched servers too fast)", me.name);
493 exit_client(cptr, acptr, &me, "Nick collision (You collided yourself)");
495 if (lastnick == acptr->lastnick)
499 return set_nick_name(cptr, sptr, nick, parc, parv);
506 * parv[0] = sender prefix
509 * If from server, source is client:
510 * parv[2] = timestamp
514 * parv[3] = timestamp
517 * parv[6] = umode (optional)
518 * parv[parc-3] = IP# <- Only Protocol >= 10
519 * parv[parc-2] = YXX, numeric nick <- Only Protocol >= 10
520 * parv[parc-1] = info
523 int m_nick(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
525 struct Client* acptr;
526 char nick[NICKLEN + 2];
532 sendto_one(sptr, err_str(ERR_NONICKNAMEGIVEN), me.name, parv[0]); /* XXX DEAD */
535 else if ((IsServer(sptr) && parc < 8) || (IsServer(cptr) && parc < 3))
537 need_more_params(sptr, "NICK");
538 sendto_ops("bad NICK param count for %s from %s", parv[1], cptr->name); /* XXX DEAD */
541 if (MyConnect(sptr) && (s = strchr(parv[1], '~')))
543 ircd_strncpy(nick, parv[1], NICKLEN);
544 nick[NICKLEN] = '\0';
545 if (IsServer(cptr)) {
546 if (IsServer(sptr)) {
547 lastnick = atoi(parv[3]);
548 if (lastnick > OLDEST_TS)
549 sptr->serv->lag = TStime() - lastnick;
551 lastnick = atoi(parv[2]);
552 if (lastnick > OLDEST_TS)
553 sptr->user->server->serv->lag = TStime() - lastnick;
557 * If do_nick_name() returns a null name OR if the server sent a nick
558 * name and do_nick_name() changed it in some way (due to rules of nick
559 * creation) then reject it. If from a server and we reject it,
560 * and KILL it. -avalon 4/4/92
562 if (do_nick_name(nick) == 0 || (IsServer(cptr) && strcmp(nick, parv[1])))
564 sendto_one(sptr, err_str(ERR_ERRONEUSNICKNAME), me.name, parv[0], parv[1]); /* XXX DEAD */
568 ServerStats->is_kill++;
569 sendto_ops("Bad Nick: %s From: %s %s", /* XXX DEAD */
570 parv[1], parv[0], cptr->name);
571 sendto_one(cptr, "%s " TOK_KILL " %s :%s (%s <- %s[%s])", /* XXX DEAD */
572 NumServ(&me), IsServer(sptr) ? parv[parc - 2] : parv[0], me.name,
573 parv[1], nick, cptr->name);
574 if (!IsServer(sptr)) /* bad nick _change_ */
576 sendto_highprot_butone(&me, 10, "%s " TOK_KILL " %s :%s (%s <- %s!%s@%s)", /* XXX DEAD */
577 NumServ(&me), parv[0], me.name, cptr->name,
578 parv[0], sptr->user ? sptr->username : "",
579 sptr->user ? sptr->user->server->name : cptr->name);
586 * Check if this is a LOCAL user trying to use a reserved (Juped)
587 * nick, if so tell him that it's a nick in use...
589 if ((!IsServer(cptr)) && isNickJuped(nick))
591 sendto_one(sptr, err_str(ERR_NICKNAMEINUSE), me.name, /* XXX DEAD */
592 /* parv[0] is empty when connecting */
593 EmptyString(parv[0]) ? "*" : parv[0], nick);
594 return 0; /* NICK message ignored */
598 * Check against nick name collisions.
600 * Put this 'if' here so that the nesting goes nicely on the screen :)
601 * We check against server name list before determining if the nickname
602 * is present in the nicklist (due to the way the below for loop is
603 * constructed). -avalon
605 if ((acptr = FindServer(nick))) {
608 sendto_one(sptr, err_str(ERR_NICKNAMEINUSE), me.name, /* XXX DEAD */
609 EmptyString(parv[0]) ? "*" : parv[0], nick);
610 return 0; /* NICK message ignored */
613 * We have a nickname trying to use the same name as
614 * a server. Send out a nick collision KILL to remove
615 * the nickname. As long as only a KILL is sent out,
616 * there is no danger of the server being disconnected.
617 * Ultimate way to jupiter a nick ? >;-). -avalon
619 sendto_ops("Nick collision on %s(%s <- %s)", /* XXX DEAD */
620 sptr->name, acptr->from->name, cptr->name);
621 ServerStats->is_kill++;
622 sendto_one(cptr, "%s " TOK_KILL " %s%s :%s (%s <- %s)", /* XXX DEAD */
623 NumServ(&me), NumNick(sptr), me.name, acptr->from->name,
625 sptr->flags |= FLAGS_KILLED;
626 return exit_client(cptr, sptr, &me, "Nick/Server collision");
629 if (!(acptr = FindClient(nick)))
630 return set_nick_name(cptr, sptr, nick, parc, parv); /* No collisions, all clear... */
632 * If acptr == sptr, then we have a client doing a nick
633 * change between *equivalent* nicknames as far as server
634 * is concerned (user is changing the case of his/her
635 * nickname or somesuch)
639 if (strcmp(acptr->name, nick) != 0)
641 * Allows change of case in his/her nick
643 return set_nick_name(cptr, sptr, nick, parc, parv);
646 * This is just ':old NICK old' type thing.
647 * Just forget the whole thing here. There is
648 * no point forwarding it to anywhere,
649 * especially since servers prior to this
650 * version would treat it as nick collision.
652 return 0; /* NICK Message ignored */
656 * Note: From this point forward it can be assumed that
657 * acptr != sptr (point to different client structures).
660 * If the older one is "non-person", the new entry is just
661 * allowed to overwrite it. Just silently drop non-person,
662 * and proceed with the nick. This should take care of the
663 * "dormant nick" way of generating collisions...
665 if (IsUnknown(acptr) && MyConnect(acptr))
667 ++ServerStats->is_ref;
668 IPcheck_connect_fail(acptr->ip);
669 exit_client(cptr, acptr, &me, "Overridden by other sign on");
670 return set_nick_name(cptr, sptr, nick, parc, parv);
673 * Decide, we really have a nick collision and deal with it
678 * NICK is coming from local client connection. Just
679 * send error reply and ignore the command.
681 sendto_one(sptr, err_str(ERR_NICKNAMEINUSE), me.name, /* XXX DEAD */
682 /* parv[0] is empty when connecting */
683 EmptyString(parv[0]) ? "*" : parv[0], nick);
684 return 0; /* NICK message ignored */
687 * NICK was coming from a server connection.
688 * This means we have a race condition (two users signing on
689 * at the same time), or two net fragments reconnecting with the same nick.
690 * The latter can happen because two different users connected
691 * or because one and the same user switched server during a net break.
692 * If the TimeStamps are equal, we kill both (or only 'new'
693 * if it was a ":server NICK new ...").
694 * Otherwise we kill the youngest when user@host differ,
695 * or the oldest when they are the same.
696 * We treat user and ~user as different, because if it wasn't
697 * a faked ~user the AUTH wouldn't have added the '~'.
704 * A new NICK being introduced by a neighbouring
705 * server (e.g. message type ":server NICK new ..." received)
707 differ = (acptr->ip.s_addr != htonl(base64toint(parv[parc - 3]))) ||
708 (0 != ircd_strcmp(acptr->user->username, parv[4]));
709 sendto_ops("Nick collision on %s (%s " TIME_T_FMT " <- %s " TIME_T_FMT /* XXX DEAD */
710 " (%s user@host))", acptr->name, acptr->from->name, acptr->lastnick,
711 cptr->name, lastnick, differ ? "Different" : "Same");
716 * A NICK change has collided (e.g. message type ":old NICK new").
718 lastnick = atoi(parv[2]);
719 differ = (acptr->ip.s_addr != sptr->ip.s_addr) ||
720 (0 != ircd_strcmp(acptr->user->username, sptr->user->username));
721 sendto_ops("Nick change collision from %s to %s (%s " TIME_T_FMT " <- %s " /* XXX DEAD */
722 TIME_T_FMT ")", sptr->name, acptr->name, acptr->from->name,
723 acptr->lastnick, cptr->name, lastnick);
726 * Now remove (kill) the nick on our side if it is the youngest.
727 * If no timestamp was received, we ignore the incoming nick
728 * (and expect a KILL for our legit nick soon ):
729 * When the timestamps are equal we kill both nicks. --Run
730 * acptr->from != cptr should *always* be true (?).
732 if (acptr->from != cptr)
734 if ((differ && lastnick >= acptr->lastnick) ||
735 (!differ && lastnick <= acptr->lastnick))
739 ServerStats->is_kill++;
740 sendto_highprot_butone(cptr, 10, /* Kill old from outgoing servers */ /* XXX DEAD */
741 "%s " TOK_KILL " %s%s :%s (%s <- %s (Nick collision))",
742 NumServ(&me), NumNick(sptr), me.name, acptr->from->name,
744 if (MyConnect(sptr) && IsServer(cptr) && Protocol(cptr) > 9)
745 sendto_one(cptr, "%s " TOK_KILL " %s%s :%s (Ghost2)", /* XXX DEAD */
746 NumServ(&me), NumNick(sptr), me.name);
747 sptr->flags |= FLAGS_KILLED;
748 exit_client(cptr, sptr, &me, "Nick collision (you're a ghost)");
750 if (lastnick != acptr->lastnick)
751 return 0; /* Ignore the NICK */
753 sendto_one(acptr, err_str(ERR_NICKCOLLISION), me.name, acptr->name, nick); /* XXX DEAD */
755 ServerStats->is_kill++;
756 acptr->flags |= FLAGS_KILLED;
759 sendto_highprot_butone(cptr, 10, /* Kill our old from outgoing servers */ /* XXX DEAD */
760 "%s " TOK_KILL " %s%s :%s (%s <- %s (older nick overruled))",
761 NumServ(&me), NumNick(acptr), me.name, acptr->from->name,
763 if (MyConnect(acptr) && IsServer(cptr) && Protocol(cptr) > 9)
764 sendto_one(cptr, "%s%s " TOK_QUIT " :Local kill by %s (Ghost)", /* XXX DEAD */
765 NumNick(acptr), me.name);
766 exit_client(cptr, acptr, &me, "Nick collision (older nick overruled)");
770 sendto_highprot_butone(cptr, 10, /* Kill our old from outgoing servers */ /* XXX DEAD */
771 "%s " TOK_KILL " %s%s :%s (%s <- %s (nick collision from same user@host))",
772 NumServ(&me), NumNick(acptr), me.name, acptr->from->name,
774 if (MyConnect(acptr) && IsServer(cptr) && Protocol(cptr) > 9)
775 sendto_one(cptr, /* XXX DEAD */
776 "%s%s " TOK_QUIT " :Local kill by %s (Ghost: switched servers too fast)",
777 NumNick(acptr), me.name);
778 exit_client(cptr, acptr, &me, "Nick collision (You collided yourself)");
780 if (lastnick == acptr->lastnick)
783 return set_nick_name(cptr, sptr, nick, parc, parv);