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 sendto_one(sptr, err_str(ERR_NONICKNAMEGIVEN), me.name, client_name);
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 sendto_one(sptr, err_str(ERR_ERRONEUSNICKNAME), me.name, client_name, 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 sendto_one(sptr, err_str(ERR_NICKNAMEINUSE), me.name, client_name, 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 sendto_one(sptr, err_str(ERR_NICKNAMEINUSE), me.name, client_name, 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 sendto_one(sptr, err_str(ERR_NICKNAMEINUSE), me.name, client_name, 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_ops("bad NICK param count for %s from %s", parv[1], cptr->name);
265 return need_more_params(sptr, "NICK");
268 ircd_strncpy(nick, parv[1], NICKLEN);
269 nick[NICKLEN] = '\0';
271 if (IsServer(sptr)) {
272 lastnick = atoi(parv[3]);
273 if (lastnick > OLDEST_TS)
274 sptr->serv->lag = TStime() - lastnick;
277 lastnick = atoi(parv[2]);
278 if (lastnick > OLDEST_TS)
279 sptr->user->server->serv->lag = TStime() - lastnick;
282 * If do_nick_name() returns a null name OR if the server sent a nick
283 * name and do_nick_name() changed it in some way (due to rules of nick
284 * creation) then reject it. If from a server and we reject it,
285 * and KILL it. -avalon 4/4/92
287 if (0 == do_nick_name(nick) || 0 != strcmp(nick, parv[1])) {
288 sendto_one(sptr, err_str(ERR_ERRONEUSNICKNAME), me.name, parv[0], parv[1]);
290 ++ServerStats->is_kill;
291 sendto_ops("Bad Nick: %s From: %s %s", parv[1], parv[0], cptr->name);
292 sendto_one(cptr, "%s " TOK_KILL " %s :%s (%s <- %s[%s])",
293 NumServ(&me), IsServer(sptr) ? parv[parc - 2] : parv[0], me.name,
294 parv[1], nick, cptr->name);
295 if (!IsServer(sptr)) {
299 sendto_highprot_butone(cptr, 10, "%s " TOK_KILL " %s :%s (%s <- %s!%s@%s)",
300 NumServ(&me), parv[0], me.name, cptr->name,
301 parv[0], sptr->user ? sptr->username : "",
302 sptr->user ? sptr->user->server->name : cptr->name);
307 * Check against nick name collisions.
309 * Put this 'if' here so that the nesting goes nicely on the screen :)
310 * We check against server name list before determining if the nickname
311 * is present in the nicklist (due to the way the below for loop is
312 * constructed). -avalon
314 if (!(acptr = FindClient(nick))) {
316 * No collisions, all clear...
318 return set_nick_name(cptr, sptr, nick, parc, parv);
322 if (IsServer(acptr)) {
324 * We have a nickname trying to use the same name as
325 * a server. Send out a nick collision KILL to remove
326 * the nickname. As long as only a KILL is sent out,
327 * there is no danger of the server being disconnected.
328 * Ultimate way to jupiter a nick ? >;-). -avalon
330 sendto_ops("Nick collision on %s(%s <- %s)", sptr->name, acptr->from->name, cptr->name);
331 ++ServerStats->is_kill;
333 sendto_one(cptr, "%s " TOK_KILL " %s%s :%s (%s <- %s)",
334 NumServ(&me), NumNick(sptr), me.name, acptr->from->name,
337 sptr->flags |= FLAGS_KILLED;
339 * if sptr is a server it is exited here, nothing else to do
341 return exit_client(cptr, sptr, &me, "Nick/Server collision");
345 * If acptr == sptr, then we have a client doing a nick
346 * change between *equivalent* nicknames as far as server
347 * is concerned (user is changing the case of his/her
348 * nickname or somesuch)
351 if (strcmp(acptr->name, nick) != 0)
353 * Allows change of case in his/her nick
355 return set_nick_name(cptr, sptr, nick, parc, parv);
358 * This is just ':old NICK old' type thing.
359 * Just forget the whole thing here. There is
360 * no point forwarding it to anywhere,
361 * especially since servers prior to this
362 * version would treat it as nick collision.
364 return 0; /* NICK Message ignored */
368 * Note: From this point forward it can be assumed that
369 * acptr != sptr (point to different client structures).
371 assert(acptr != sptr);
373 * If the older one is "non-person", the new entry is just
374 * allowed to overwrite it. Just silently drop non-person,
375 * and proceed with the nick. This should take care of the
376 * "dormant nick" way of generating collisions...
378 if (IsUnknown(acptr) && MyConnect(acptr)) {
379 ++ServerStats->is_ref;
380 IPcheck_connect_fail(acptr->ip);
381 exit_client(cptr, acptr, &me, "Overridden by other sign on");
382 return set_nick_name(cptr, sptr, nick, parc, parv);
385 * Decide, we really have a nick collision and deal with it
388 * NICK was coming from a server connection.
389 * This means we have a race condition (two users signing on
390 * at the same time), or two net fragments reconnecting with the same nick.
391 * The latter can happen because two different users connected
392 * or because one and the same user switched server during a net break.
393 * If the TimeStamps are equal, we kill both (or only 'new'
394 * if it was a ":server NICK new ...").
395 * Otherwise we kill the youngest when user@host differ,
396 * or the oldest when they are the same.
397 * We treat user and ~user as different, because if it wasn't
398 * a faked ~user the AUTH wouldn't have added the '~'.
402 if (IsServer(sptr)) {
404 * A new NICK being introduced by a neighbouring
405 * server (e.g. message type ":server NICK new ..." received)
407 * compare IP address and username
409 differ = (acptr->ip.s_addr != htonl(base64toint(parv[parc - 3]))) ||
410 (0 != ircd_strcmp(acptr->user->username, parv[4]));
411 sendto_ops("Nick collision on %s (%s " TIME_T_FMT " <- %s " TIME_T_FMT
412 " (%s user@host))", acptr->name, acptr->from->name, acptr->lastnick,
413 cptr->name, lastnick, differ ? "Different" : "Same");
417 * A NICK change has collided (e.g. message type ":old NICK new").
419 * compare IP address and username
421 differ = (acptr->ip.s_addr != sptr->ip.s_addr) ||
422 (0 != ircd_strcmp(acptr->user->username, sptr->user->username));
423 sendto_ops("Nick change collision from %s to %s (%s " TIME_T_FMT " <- %s "
424 TIME_T_FMT ")", sptr->name, acptr->name, acptr->from->name,
425 acptr->lastnick, cptr->name, lastnick);
428 * Now remove (kill) the nick on our side if it is the youngest.
429 * If no timestamp was received, we ignore the incoming nick
430 * (and expect a KILL for our legit nick soon ):
431 * When the timestamps are equal we kill both nicks. --Run
432 * acptr->from != cptr should *always* be true (?).
434 * This exits the client sending the NICK message
436 if (acptr->from != cptr) {
437 if ((differ && lastnick >= acptr->lastnick) || (!differ && lastnick <= acptr->lastnick)) {
438 if (!IsServer(sptr)) {
439 ++ServerStats->is_kill;
440 sendto_highprot_butone(cptr, 10, /* Kill old from outgoing servers */
441 "%s " TOK_KILL " %s%s :%s (%s <- %s (Nick collision))",
442 NumServ(&me), NumNick(sptr), me.name, acptr->from->name,
444 assert(!MyConnect(sptr));
450 sendto_one(cptr, "%s " TOK_KILL " %s%s :%s (Ghost 2)",
451 NumServ(&me), NumNick(sptr), me.name);
453 sptr->flags |= FLAGS_KILLED;
454 exit_client(cptr, sptr, &me, "Nick collision (you're a ghost)");
456 * we have killed sptr off, zero out it's pointer so if it's used
457 * again we'll know about it --Bleep
461 if (lastnick != acptr->lastnick)
462 return 0; /* Ignore the NICK */
464 sendto_one(acptr, err_str(ERR_NICKCOLLISION), me.name, acptr->name, nick);
467 ++ServerStats->is_kill;
468 acptr->flags |= FLAGS_KILLED;
470 * This exits the client we had before getting the NICK message
473 sendto_highprot_butone(cptr, 10, /* Kill our old from outgoing servers */
474 "%s " TOK_KILL " %s%s :%s (%s <- %s (older nick overruled))",
475 NumServ(&me), NumNick(acptr), me.name, acptr->from->name,
477 if (MyConnect(acptr))
478 sendto_one(cptr, "%s%s " TOK_QUIT " :Local kill by %s (Ghost)",
479 NumNick(acptr), me.name);
480 exit_client(cptr, acptr, &me, "Nick collision (older nick overruled)");
483 sendto_highprot_butone(cptr, 10, /* Kill our old from outgoing servers */
484 "%s " TOK_KILL " %s%s :%s (%s <- %s (nick collision from same user@host))",
485 NumServ(&me), NumNick(acptr), me.name, acptr->from->name,
487 if (MyConnect(acptr))
489 "%s%s " TOK_QUIT " :Local kill by %s (Ghost: switched servers too fast)",
490 NumNick(acptr), me.name);
491 exit_client(cptr, acptr, &me, "Nick collision (You collided yourself)");
493 if (lastnick == acptr->lastnick)
497 return set_nick_name(cptr, sptr, nick, parc, parv);
504 * parv[0] = sender prefix
507 * If from server, source is client:
508 * parv[2] = timestamp
512 * parv[3] = timestamp
515 * parv[6] = umode (optional)
516 * parv[parc-3] = IP# <- Only Protocol >= 10
517 * parv[parc-2] = YXX, numeric nick <- Only Protocol >= 10
518 * parv[parc-1] = info
521 int m_nick(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
523 struct Client* acptr;
524 char nick[NICKLEN + 2];
530 sendto_one(sptr, err_str(ERR_NONICKNAMEGIVEN), me.name, parv[0]);
533 else if ((IsServer(sptr) && parc < 8) || (IsServer(cptr) && parc < 3))
535 need_more_params(sptr, "NICK");
536 sendto_ops("bad NICK param count for %s from %s", parv[1], cptr->name);
539 if (MyConnect(sptr) && (s = strchr(parv[1], '~')))
541 ircd_strncpy(nick, parv[1], NICKLEN);
542 nick[NICKLEN] = '\0';
543 if (IsServer(cptr)) {
544 if (IsServer(sptr)) {
545 lastnick = atoi(parv[3]);
546 if (lastnick > OLDEST_TS)
547 sptr->serv->lag = TStime() - lastnick;
549 lastnick = atoi(parv[2]);
550 if (lastnick > OLDEST_TS)
551 sptr->user->server->serv->lag = TStime() - lastnick;
555 * If do_nick_name() returns a null name OR if the server sent a nick
556 * name and do_nick_name() changed it in some way (due to rules of nick
557 * creation) then reject it. If from a server and we reject it,
558 * and KILL it. -avalon 4/4/92
560 if (do_nick_name(nick) == 0 || (IsServer(cptr) && strcmp(nick, parv[1])))
562 sendto_one(sptr, err_str(ERR_ERRONEUSNICKNAME), me.name, parv[0], parv[1]);
566 ServerStats->is_kill++;
567 sendto_ops("Bad Nick: %s From: %s %s",
568 parv[1], parv[0], cptr->name);
569 sendto_one(cptr, "%s " TOK_KILL " %s :%s (%s <- %s[%s])",
570 NumServ(&me), IsServer(sptr) ? parv[parc - 2] : parv[0], me.name,
571 parv[1], nick, cptr->name);
572 if (!IsServer(sptr)) /* bad nick _change_ */
574 sendto_highprot_butone(cptr, 10, "%s " TOK_KILL " %s :%s (%s <- %s!%s@%s)",
575 NumServ(&me), parv[0], me.name, cptr->name,
576 parv[0], sptr->user ? sptr->username : "",
577 sptr->user ? sptr->user->server->name : cptr->name);
584 * Check if this is a LOCAL user trying to use a reserved (Juped)
585 * nick, if so tell him that it's a nick in use...
587 if ((!IsServer(cptr)) && isNickJuped(nick))
589 sendto_one(sptr, err_str(ERR_NICKNAMEINUSE), me.name,
590 /* parv[0] is empty when connecting */
591 EmptyString(parv[0]) ? "*" : parv[0], nick);
592 return 0; /* NICK message ignored */
596 * Check against nick name collisions.
598 * Put this 'if' here so that the nesting goes nicely on the screen :)
599 * We check against server name list before determining if the nickname
600 * is present in the nicklist (due to the way the below for loop is
601 * constructed). -avalon
603 if ((acptr = FindServer(nick))) {
606 sendto_one(sptr, err_str(ERR_NICKNAMEINUSE), me.name,
607 EmptyString(parv[0]) ? "*" : parv[0], nick);
608 return 0; /* NICK message ignored */
611 * We have a nickname trying to use the same name as
612 * a server. Send out a nick collision KILL to remove
613 * the nickname. As long as only a KILL is sent out,
614 * there is no danger of the server being disconnected.
615 * Ultimate way to jupiter a nick ? >;-). -avalon
617 sendto_ops("Nick collision on %s(%s <- %s)",
618 sptr->name, acptr->from->name, cptr->name);
619 ServerStats->is_kill++;
620 sendto_one(cptr, "%s " TOK_KILL " %s%s :%s (%s <- %s)",
621 NumServ(&me), NumNick(sptr), me.name, acptr->from->name,
623 sptr->flags |= FLAGS_KILLED;
624 return exit_client(cptr, sptr, &me, "Nick/Server collision");
627 if (!(acptr = FindClient(nick)))
628 return set_nick_name(cptr, sptr, nick, parc, parv); /* No collisions, all clear... */
630 * If acptr == sptr, then we have a client doing a nick
631 * change between *equivalent* nicknames as far as server
632 * is concerned (user is changing the case of his/her
633 * nickname or somesuch)
637 if (strcmp(acptr->name, nick) != 0)
639 * Allows change of case in his/her nick
641 return set_nick_name(cptr, sptr, nick, parc, parv);
644 * This is just ':old NICK old' type thing.
645 * Just forget the whole thing here. There is
646 * no point forwarding it to anywhere,
647 * especially since servers prior to this
648 * version would treat it as nick collision.
650 return 0; /* NICK Message ignored */
654 * Note: From this point forward it can be assumed that
655 * acptr != sptr (point to different client structures).
658 * If the older one is "non-person", the new entry is just
659 * allowed to overwrite it. Just silently drop non-person,
660 * and proceed with the nick. This should take care of the
661 * "dormant nick" way of generating collisions...
663 if (IsUnknown(acptr) && MyConnect(acptr))
665 ++ServerStats->is_ref;
666 IPcheck_connect_fail(acptr->ip);
667 exit_client(cptr, acptr, &me, "Overridden by other sign on");
668 return set_nick_name(cptr, sptr, nick, parc, parv);
671 * Decide, we really have a nick collision and deal with it
676 * NICK is coming from local client connection. Just
677 * send error reply and ignore the command.
679 sendto_one(sptr, err_str(ERR_NICKNAMEINUSE), me.name,
680 /* parv[0] is empty when connecting */
681 EmptyString(parv[0]) ? "*" : parv[0], nick);
682 return 0; /* NICK message ignored */
685 * NICK was coming from a server connection.
686 * This means we have a race condition (two users signing on
687 * at the same time), or two net fragments reconnecting with the same nick.
688 * The latter can happen because two different users connected
689 * or because one and the same user switched server during a net break.
690 * If the TimeStamps are equal, we kill both (or only 'new'
691 * if it was a ":server NICK new ...").
692 * Otherwise we kill the youngest when user@host differ,
693 * or the oldest when they are the same.
694 * We treat user and ~user as different, because if it wasn't
695 * a faked ~user the AUTH wouldn't have added the '~'.
702 * A new NICK being introduced by a neighbouring
703 * server (e.g. message type ":server NICK new ..." received)
705 differ = (acptr->ip.s_addr != htonl(base64toint(parv[parc - 3]))) ||
706 (0 != ircd_strcmp(acptr->user->username, parv[4]));
707 sendto_ops("Nick collision on %s (%s " TIME_T_FMT " <- %s " TIME_T_FMT
708 " (%s user@host))", acptr->name, acptr->from->name, acptr->lastnick,
709 cptr->name, lastnick, differ ? "Different" : "Same");
714 * A NICK change has collided (e.g. message type ":old NICK new").
716 lastnick = atoi(parv[2]);
717 differ = (acptr->ip.s_addr != sptr->ip.s_addr) ||
718 (0 != ircd_strcmp(acptr->user->username, sptr->user->username));
719 sendto_ops("Nick change collision from %s to %s (%s " TIME_T_FMT " <- %s "
720 TIME_T_FMT ")", sptr->name, acptr->name, acptr->from->name,
721 acptr->lastnick, cptr->name, lastnick);
724 * Now remove (kill) the nick on our side if it is the youngest.
725 * If no timestamp was received, we ignore the incoming nick
726 * (and expect a KILL for our legit nick soon ):
727 * When the timestamps are equal we kill both nicks. --Run
728 * acptr->from != cptr should *always* be true (?).
730 if (acptr->from != cptr)
732 if ((differ && lastnick >= acptr->lastnick) ||
733 (!differ && lastnick <= acptr->lastnick))
737 ServerStats->is_kill++;
738 sendto_highprot_butone(cptr, 10, /* Kill old from outgoing servers */
739 "%s " TOK_KILL " %s%s :%s (%s <- %s (Nick collision))",
740 NumServ(&me), NumNick(sptr), me.name, acptr->from->name,
742 if (MyConnect(sptr) && IsServer(cptr) && Protocol(cptr) > 9)
743 sendto_one(cptr, "%s " TOK_KILL " %s%s :%s (Ghost2)",
744 NumServ(&me), NumNick(sptr), me.name);
745 sptr->flags |= FLAGS_KILLED;
746 exit_client(cptr, sptr, &me, "Nick collision (you're a ghost)");
748 if (lastnick != acptr->lastnick)
749 return 0; /* Ignore the NICK */
751 sendto_one(acptr, err_str(ERR_NICKCOLLISION), me.name, acptr->name, nick);
753 ServerStats->is_kill++;
754 acptr->flags |= FLAGS_KILLED;
757 sendto_highprot_butone(cptr, 10, /* Kill our old from outgoing servers */
758 "%s " TOK_KILL " %s%s :%s (%s <- %s (older nick overruled))",
759 NumServ(&me), NumNick(acptr), me.name, acptr->from->name,
761 if (MyConnect(acptr) && IsServer(cptr) && Protocol(cptr) > 9)
762 sendto_one(cptr, "%s%s " TOK_QUIT " :Local kill by %s (Ghost)",
763 NumNick(acptr), me.name);
764 exit_client(cptr, acptr, &me, "Nick collision (older nick overruled)");
768 sendto_highprot_butone(cptr, 10, /* Kill our old from outgoing servers */
769 "%s " TOK_KILL " %s%s :%s (%s <- %s (nick collision from same user@host))",
770 NumServ(&me), NumNick(acptr), me.name, acptr->from->name,
772 if (MyConnect(acptr) && IsServer(cptr) && Protocol(cptr) > 9)
774 "%s%s " TOK_QUIT " :Local kill by %s (Ghost: switched servers too fast)",
775 NumNick(acptr), me.name);
776 exit_client(cptr, acptr, &me, "Nick collision (You collided yourself)");
778 if (lastnick == acptr->lastnick)
781 return set_nick_name(cptr, sptr, nick, parc, parv);