/*
** m_svsnick
** parv[0] = sender
** parv[1] = old nickname
** parv[2] = new nickname
** parv[3] = timestamp
*/
int m_svsnick(aClient *cptr, aClient *sptr, int parc, char *parv[])
{
aClient *acptr;
aClient *ocptr; /* Other client */
if (!IsULine(sptr) || parc < 4 || (strlen(parv[2]) > NICKLEN))
return -1; /* This looks like an error anyway -Studded */
if (hunt_server_token(cptr, sptr, MSG_SVSNICK, TOK_SVSNICK, "%s %s :%s", 1, parc, parv) != HUNTED_ISME)
return 0; /* Forwarded, done */
if (do_nick_name(parv[2]) == 0)
return 0;
if (!(acptr = find_person(parv[1], NULL)))
return 0; /* User not found, bail out */
if ((ocptr = find_client(parv[2], NULL)) && ocptr != acptr) /* Collision */
{
exit_client(acptr, acptr, sptr,
"Nickname collision due to Services enforced "
"nickname change, your nick was overruled");
return 0;
}
if (acptr != ocptr)
acptr->umodes &= ~UMODE_REGNICK;
acptr->lastnick = TS2ts(parv[3]);
sendto_common_channels(acptr, ":%s NICK :%s", parv[1], parv[2]);
add_history(acptr, 1);
sendto_serv_butone_token(NULL, parv[1], MSG_NICK, TOK_NICK,
"%s :%ld", parv[2], TS2ts(parv[3]));
(void)del_from_client_hash_table(acptr->name, acptr);
hash_check_watch(acptr, RPL_LOGOFF);
sendto_snomask(SNO_NICKCHANGE,
"*** Notice -- %s (%s@%s) has been forced to change his/her nickname to %s",
acptr->name, acptr->user->username, acptr->user->realhost, parv[2]);
RunHook2(HOOKTYPE_LOCAL_NICKCHANGE, acptr, parv[2]);
strlcpy(acptr->name, parv[2], sizeof acptr->name);
add_to_client_hash_table(parv[2], acptr);
hash_check_watch(acptr, RPL_LOGON);
return 0;
}
void
exit_one_client_in_split(aClient *cptr, aClient *dead, char *reason)
{
Link *lp;
/* send all the quit reasons to all the non-noquit servers we have */
/* yikes. We only want to do this if dead was OUR server. */
/* erm, no, that's not true. Doing that breaks things.
* If a non-noquit server is telling us a server has split,
* we will have already recieved hundreds of QUIT messages
* from it, which will be passed anyway, and this procedure
* will never be called. - lucas
*/
#ifdef NOQUIT
sendto_non_noquit_servs_butone(dead, ":%s QUIT :%s", cptr->name, reason);
#endif
sendto_common_channels(cptr, ":%s QUIT :%s", cptr->name, reason);
while ((lp = cptr->user->channel))
remove_user_from_channel(cptr, lp->value.chptr);
while ((lp = cptr->user->invited))
del_invite(cptr, lp->value.chptr);
while ((lp = cptr->user->silence))
del_silence(cptr, lp->value.cp);
if (cptr->user->alias)
cptr->user->alias->client = NULL;
clones_remove(cptr);
#ifdef RWHO_PROBABILITY
probability_remove(cptr);
#endif
remove_dcc_references(cptr);
del_from_client_hash_table(cptr->name, cptr);
hash_check_watch(cptr, RPL_LOGOFF);
remove_client_from_list(cptr);
}
void change_nick(aClient *acptr, char *newnick)
{
char nick[NICKLEN + 2];
strncpy_irc(nick, newnick, NICKLEN);
nick[NICKLEN] = '\0';
ClearIdentified(acptr); /* maybe not needed, but safe -Lamego */
/* send change to common channels */
sendto_common_channels(acptr, ":%s NICK :%s", acptr->name, nick);
if (acptr->user)
{
acptr->tsinfo = CurrentTime;
add_history(acptr,1);
/* propagate to all servers */
sendto_serv_butone(NULL, ":%s NICK %s :%lu",
acptr->name, nick, acptr->tsinfo);
}
/*
** Finally set new nick name.
*/
if (acptr->name[0])
{
del_from_client_hash_table(acptr->name, acptr);
hash_check_watch(acptr, RPL_LOGOFF);
}
strcpy(acptr->name, nick);
add_to_client_hash_table(nick, acptr);
hash_check_watch(acptr, RPL_LOGON);
/* Lets apply nick change delay (if needed) */
acptr->services_nick_change++;
if(acptr->services_nick_change>1)
{
acptr->number_of_nick_changes = MAX_NICK_CHANGES+1;
acptr->last_nick_change = CurrentTime;
acptr->services_nick_change = 0;
}
}
/*
* set_initial_nick
* inputs
* output
* side effects -
*
* This function is only called to set up an initially registering
* client.
*/
int
set_initial_nick(struct Client *client_p, struct Client *source_p,
char *nick)
{
char buf[USERLEN + 1];
/* Client setting NICK the first time */
/* This had to be copied here to avoid problems.. */
source_p->tsinfo = CurrentTime;
if (source_p->name[0])
del_from_client_hash_table(source_p->name, source_p);
strcpy(source_p->name, nick);
add_to_client_hash_table(nick, source_p);
/* fd_desc is long enough */
fd_note(client_p->localClient->fd, "Nick: %s", nick);
/* They have the nick they want now.. */
*client_p->llname = '\0';
if (source_p->user)
{
strlcpy(buf, source_p->username, USERLEN);
/*
* USER already received, now we have NICK.
* *NOTE* For servers "NICK" *must* precede the
* user message (giving USER before NICK is possible
* only for local client connection!). register_user
* may reject the client and call exit_client for it
* --must test this and exit m_nick too!!!
*/
#ifdef USE_IAUTH
/*
* Send the client to the iauth module for verification
*/
BeginAuthorization(source_p);
#else
if (register_local_user(client_p, source_p, nick, buf) == CLIENT_EXITED)
return CLIENT_EXITED;
#endif
}
return 0;
}
/*
** m_nick
** parv[0] = sender prefix
** parv[1] = nickname
** if from new client -taz
** parv[2] = nick password
** if from server:
** parv[2] = hopcount
** parv[3] = timestamp
** parv[4] = username
** parv[5] = hostname
** parv[6] = servername
** if NICK version 1:
** parv[7] = servicestamp
** parv[8] = info
** if NICK version 2:
** parv[7] = servicestamp
** parv[8] = umodes
** parv[9] = virthost, * if none
** parv[10] = info
** if NICKIP:
** parv[10] = ip
** parv[11] = info
*/
DLLFUNC CMD_FUNC(m_nick)
{
aTKline *tklban;
int ishold;
aClient *acptr, *serv = NULL;
aClient *acptrs;
char nick[NICKLEN + 2], *s;
Membership *mp;
time_t lastnick = (time_t) 0;
int differ = 1, update_watch = 1;
unsigned char newusr = 0, removemoder = 1;
/*
* If the user didn't specify a nickname, complain
*/
if (parc < 2)
{
sendto_one(sptr, err_str(ERR_NONICKNAMEGIVEN),
me.name, parv[0]);
return 0;
}
strncpyzt(nick, parv[1], NICKLEN + 1);
if (MyConnect(sptr) && sptr->user && !IsAnOper(sptr))
{
if ((sptr->user->flood.nick_c >= NICK_COUNT) &&
(TStime() - sptr->user->flood.nick_t < NICK_PERIOD))
{
/* Throttle... */
sendto_one(sptr, err_str(ERR_NCHANGETOOFAST), me.name, sptr->name, nick,
(int)(NICK_PERIOD - (TStime() - sptr->user->flood.nick_t)));
return 0;
}
}
/* For a local clients, do proper nickname checking via do_nick_name()
* and reject the nick if it returns false.
* For remote clients, do a quick check by using do_remote_nick_name(),
* if this returned false then reject and kill it. -- Syzop
*/
if ((IsServer(cptr) && !do_remote_nick_name(nick)) ||
(!IsServer(cptr) && !do_nick_name(nick)))
{
sendto_one(sptr, err_str(ERR_ERRONEUSNICKNAME),
me.name, parv[0], parv[1], "Illegal characters");
if (IsServer(cptr))
{
ircstp->is_kill++;
sendto_failops("Bad Nick: %s From: %s %s",
parv[1], parv[0], get_client_name(cptr, FALSE));
sendto_one(cptr, ":%s KILL %s :%s (%s <- %s[%s])",
me.name, parv[1], me.name, parv[1],
nick, cptr->name);
if (sptr != cptr)
{ /* bad nick change */
sendto_serv_butone(cptr,
":%s KILL %s :%s (%s <- %s!%s@%s)",
me.name, parv[0], me.name,
get_client_name(cptr, FALSE),
parv[0],
sptr->user ? sptr->username : "",
sptr->user ? sptr->user->server :
cptr->name);
sptr->flags |= FLAGS_KILLED;
return exit_client(cptr, sptr, &me, "BadNick");
}
}
return 0;
}
/* Kill quarantined opers early... */
if (IsServer(cptr) && (sptr->from->flags & FLAGS_QUARANTINE) &&
(parc >= 11) && strchr(parv[8], 'o'))
{
ircstp->is_kill++;
/* Send kill to uplink only, hasn't been broadcasted to the rest, anyway */
sendto_one(cptr, ":%s KILL %s :%s (Quarantined: no global oper privileges allowed)",
me.name, parv[1], me.name);
sendto_realops("QUARANTINE: Oper %s on server %s killed, due to quarantine",
parv[1], sptr->name);
/* (nothing to exit_client or to free, since user was never added) */
return 0;
}
/*
** Protocol 4 doesn't send the server as prefix, so it is possible
** the server doesn't exist (a lagged net.burst), in which case
** we simply need to ignore the NICK. Also when we got that server
** name (again) but from another direction. --Run
*/
/*
** We should really only deal with this for msgs from servers.
** -- Aeto
*/
if (IsServer(cptr) &&
(parc > 7
&& (!(serv = (aClient *)find_server_b64_or_real(parv[6]))
|| serv->from != cptr->from)))
{
sendto_realops("Cannot find server %s (%s)", parv[6],
backupbuf);
return 0;
}
/*
** Check against nick name collisions.
**
** Put this 'if' here so that the nesting goes nicely on the screen :)
** We check against server name list before determining if the nickname
** is present in the nicklist (due to the way the below for loop is
** constructed). -avalon
*/
/* I managed to f**k this up i guess --stskeeps */
if ((acptr = find_server(nick, NULL)))
{
if (MyConnect(sptr))
{
#ifdef GUEST
if (IsUnknown(sptr))
{
RunHook4(HOOKTYPE_GUEST, cptr, sptr, parc, parv);
return 0;
}
#endif
sendto_one(sptr, err_str(ERR_NICKNAMEINUSE), me.name,
BadPtr(parv[0]) ? "*" : parv[0], nick);
return 0; /* NICK message ignored */
}
}
/*
** Check for a Q-lined nickname. If we find it, and it's our
** client, just reject it. -Lefler
** Allow opers to use Q-lined nicknames. -Russell
*/
if (!stricmp("ircd", nick))
{
sendto_one(sptr, err_str(ERR_ERRONEUSNICKNAME), me.name,
BadPtr(parv[0]) ? "*" : parv[0], nick,
"Reserved for internal IRCd purposes");
return 0;
}
if (!stricmp("irc", nick))
{
sendto_one(sptr, err_str(ERR_ERRONEUSNICKNAME), me.name,
BadPtr(parv[0]) ? "*" : parv[0], nick,
"Reserved for internal IRCd purposes");
return 0;
}
if (MyClient(sptr)) /* local client changin nick afterwards.. */
{
int xx;
spamfilter_build_user_string(spamfilter_user, nick, sptr);
xx = dospamfilter(sptr, spamfilter_user, SPAMF_USER, NULL, 0, NULL);
if (xx < 0)
return xx;
}
if (!IsULine(sptr) && (tklban = find_qline(sptr, nick, &ishold)))
{
if (IsServer(sptr) && !ishold) /* server introducing new client */
{
acptrs =
(aClient *)find_server_b64_or_real(sptr->user ==
NULL ? (char *)parv[6] : (char *)sptr->user->
server);
/* (NEW: no unregistered q:line msgs anymore during linking) */
if (!acptrs || (acptrs->serv && acptrs->serv->flags.synced))
sendto_snomask(SNO_QLINE, "Q:lined nick %s from %s on %s", nick,
(*sptr->name != 0
&& !IsServer(sptr) ? sptr->name : "<unregistered>"),
acptrs ? acptrs->name : "unknown server");
}
if (IsServer(cptr) && IsPerson(sptr) && !ishold) /* remote user changing nick */
{
sendto_snomask(SNO_QLINE, "Q:lined nick %s from %s on %s", nick,
sptr->name, sptr->srvptr ? sptr->srvptr->name : "<unknown>");
}
if (!IsServer(cptr)) /* local */
{
if (ishold)
{
sendto_one(sptr, err_str(ERR_ERRONEUSNICKNAME),
me.name, BadPtr(parv[0]) ? "*" : parv[0],
nick, tklban->reason);
return 0;
}
if (!IsOper(cptr))
{
sptr->since += 4; /* lag them up */
sendto_one(sptr, err_str(ERR_ERRONEUSNICKNAME),
me.name, BadPtr(parv[0]) ? "*" : parv[0],
nick, tklban->reason);
sendto_snomask(SNO_QLINE, "Forbidding Q-lined nick %s from %s.",
nick, get_client_name(cptr, FALSE));
return 0; /* NICK message ignored */
}
}
}
/*
** acptr already has result from previous find_server()
*/
if (acptr)
{
/*
** We have a nickname trying to use the same name as
** a server. Send out a nick collision KILL to remove
** the nickname. As long as only a KILL is sent out,
** there is no danger of the server being disconnected.
** Ultimate way to jupiter a nick ? >;-). -avalon
*/
sendto_failops("Nick collision on %s(%s <- %s)",
sptr->name, acptr->from->name,
get_client_name(cptr, FALSE));
ircstp->is_kill++;
sendto_one(cptr, ":%s KILL %s :%s (%s <- %s)",
me.name, sptr->name, me.name, acptr->from->name,
/* NOTE: Cannot use get_client_name
** twice here, it returns static
** string pointer--the other info
** would be lost
*/
get_client_name(cptr, FALSE));
sptr->flags |= FLAGS_KILLED;
return exit_client(cptr, sptr, &me, "Nick/Server collision");
}
if (MyClient(cptr) && !IsOper(cptr))
cptr->since += 3; /* Nick-flood prot. -Donwulff */
if (!(acptr = find_client(nick, NULL)))
goto nickkilldone; /* No collisions, all clear... */
/*
** If the older one is "non-person", the new entry is just
** allowed to overwrite it. Just silently drop non-person,
** and proceed with the nick. This should take care of the
** "dormant nick" way of generating collisions...
*/
/* Moved before Lost User Field to fix some bugs... -- Barubary */
if (IsUnknown(acptr) && MyConnect(acptr))
{
/* This may help - copying code below */
if (acptr == cptr)
return 0;
acptr->flags |= FLAGS_KILLED;
exit_client(NULL, acptr, &me, "Overridden");
goto nickkilldone;
}
/* A sanity check in the user field... */
if (acptr->user == NULL)
{
/* This is a Bad Thing */
sendto_failops("Lost user field for %s in change from %s",
acptr->name, get_client_name(cptr, FALSE));
ircstp->is_kill++;
sendto_one(acptr, ":%s KILL %s :%s (Lost user field!)",
me.name, acptr->name, me.name);
acptr->flags |= FLAGS_KILLED;
/* Here's the previous versions' desynch. If the old one is
messed up, trash the old one and accept the new one.
Remember - at this point there is a new nick coming in!
Handle appropriately. -- Barubary */
exit_client(NULL, acptr, &me, "Lost user field");
goto nickkilldone;
}
/*
** If acptr == sptr, then we have a client doing a nick
** change between *equivalent* nicknames as far as server
** is concerned (user is changing the case of his/her
** nickname or somesuch)
*/
if (acptr == sptr) {
if (strcmp(acptr->name, nick) != 0)
{
/* Allows change of case in his/her nick */
removemoder = 0; /* don't set the user -r */
goto nickkilldone; /* -- go and process change */
} else
/*
** This is just ':old NICK old' type thing.
** Just forget the whole thing here. There is
** no point forwarding it to anywhere,
** especially since servers prior to this
** version would treat it as nick collision.
*/
return 0; /* NICK Message ignored */
}
/*
** Note: From this point forward it can be assumed that
** acptr != sptr (point to different client structures).
*/
/*
** Decide, we really have a nick collision and deal with it
*/
if (!IsServer(cptr))
{
/*
** NICK is coming from local client connection. Just
** send error reply and ignore the command.
*/
#ifdef GUEST
if (IsUnknown(sptr))
{
RunHook4(HOOKTYPE_GUEST, cptr, sptr, parc, parv);
return 0;
}
#endif
sendto_one(sptr, err_str(ERR_NICKNAMEINUSE),
/* parv[0] is empty when connecting */
me.name, BadPtr(parv[0]) ? "*" : parv[0], nick);
return 0; /* NICK message ignored */
}
/*
** NICK was coming from a server connection.
** This means we have a race condition (two users signing on
** at the same time), or two net fragments reconnecting with
** the same nick.
** The latter can happen because two different users connected
** or because one and the same user switched server during a
** net break.
** If we have the old protocol (no TimeStamp and no user@host)
** or if the TimeStamps are equal, we kill both (or only 'new'
** if it was a "NICK new"). Otherwise we kill the youngest
** when user@host differ, or the oldest when they are the same.
** --Run
**
*/
if (IsServer(sptr))
{
/*
** A new NICK being introduced by a neighbouring
** server (e.g. message type "NICK new" received)
*/
if (parc > 3)
{
lastnick = TS2ts(parv[3]);
if (parc > 5)
differ = (mycmp(acptr->user->username, parv[4])
|| mycmp(acptr->user->realhost, parv[5]));
}
sendto_failops("Nick collision on %s (%s %ld <- %s %ld)",
acptr->name, acptr->from->name, acptr->lastnick,
cptr->name, lastnick);
/*
** I'm putting the KILL handling here just to make it easier
** to read, it's hard to follow it the way it used to be.
** Basically, this is what it will do. It will kill both
** users if no timestamp is given, or they are equal. It will
** kill the user on our side if the other server is "correct"
** (user@host differ and their user is older, or user@host are
** the same and their user is younger), otherwise just kill the
** user an reintroduce our correct user.
** The old code just sat there and "hoped" the other server
** would kill their user. Not anymore.
** -- binary
*/
if (!(parc > 3) || (acptr->lastnick == lastnick))
{
ircstp->is_kill++;
sendto_serv_butone(NULL,
":%s KILL %s :%s (Nick Collision)",
me.name, acptr->name, me.name);
acptr->flags |= FLAGS_KILLED;
(void)exit_client(NULL, acptr, &me,
"Nick collision with no timestamp/equal timestamps");
return 0; /* We killed both users, now stop the process. */
}
if ((differ && (acptr->lastnick > lastnick)) ||
(!differ && (acptr->lastnick < lastnick)) || acptr->from == cptr) /* we missed a QUIT somewhere ? */
{
ircstp->is_kill++;
sendto_serv_butone(cptr,
":%s KILL %s :%s (Nick Collision)",
me.name, acptr->name, me.name);
acptr->flags |= FLAGS_KILLED;
(void)exit_client(NULL, acptr, &me, "Nick collision");
goto nickkilldone; /* OK, we got rid of the "wrong" user,
** now we're going to add the user the
** other server introduced.
*/
}
if ((differ && (acptr->lastnick < lastnick)) ||
(!differ && (acptr->lastnick > lastnick)))
{
/*
* Introduce our "correct" user to the other server
*/
sendto_one(cptr, ":%s KILL %s :%s (Nick Collision)",
me.name, parv[1], me.name);
send_umode(NULL, acptr, 0, SEND_UMODES, buf);
sendto_one_nickcmd(cptr, acptr, buf);
if (acptr->user->away)
sendto_one(cptr, ":%s AWAY :%s", acptr->name,
acptr->user->away);
send_user_joins(cptr, acptr);
return 0; /* Ignore the NICK */
}
return 0;
}
else
{
/*
** A NICK change has collided (e.g. message type ":old NICK new").
*/
if (parc > 2)
lastnick = TS2ts(parv[2]);
differ = (mycmp(acptr->user->username, sptr->user->username) ||
mycmp(acptr->user->realhost, sptr->user->realhost));
sendto_failops
("Nick change collision from %s to %s (%s %ld <- %s %ld)",
sptr->name, acptr->name, acptr->from->name, acptr->lastnick,
sptr->from->name, lastnick);
if (!(parc > 2) || lastnick == acptr->lastnick)
{
ircstp->is_kill += 2;
sendto_serv_butone(NULL, /* First kill the new nick. */
":%s KILL %s :%s (Self Collision)",
me.name, acptr->name, me.name);
sendto_serv_butone(cptr, /* Tell my servers to kill the old */
":%s KILL %s :%s (Self Collision)",
me.name, sptr->name, me.name);
sptr->flags |= FLAGS_KILLED;
acptr->flags |= FLAGS_KILLED;
(void)exit_client(NULL, sptr, &me, "Self Collision");
(void)exit_client(NULL, acptr, &me, "Self Collision");
return 0; /* Now that I killed them both, ignore the NICK */
}
if ((differ && (acptr->lastnick > lastnick)) ||
(!differ && (acptr->lastnick < lastnick)))
{
/* sptr (their user) won, let's kill acptr (our user) */
ircstp->is_kill++;
sendto_serv_butone(cptr,
":%s KILL %s :%s (Nick collision: %s <- %s)",
me.name, acptr->name, me.name,
acptr->from->name, sptr->from->name);
acptr->flags |= FLAGS_KILLED;
(void)exit_client(NULL, acptr, &me, "Nick collision");
goto nickkilldone; /* their user won, introduce new nick */
}
if ((differ && (acptr->lastnick < lastnick)) ||
(!differ && (acptr->lastnick > lastnick)))
{
/* acptr (our user) won, let's kill sptr (their user),
** and reintroduce our "correct" user
*/
ircstp->is_kill++;
/* Kill the user trying to change their nick. */
sendto_serv_butone(cptr,
":%s KILL %s :%s (Nick collision: %s <- %s)",
me.name, sptr->name, me.name,
sptr->from->name, acptr->from->name);
sptr->flags |= FLAGS_KILLED;
(void)exit_client(NULL, sptr, &me, "Nick collision");
/*
* Introduce our "correct" user to the other server
*/
/* Kill their user. */
sendto_one(cptr, ":%s KILL %s :%s (Nick Collision)",
me.name, parv[1], me.name);
send_umode(NULL, acptr, 0, SEND_UMODES, buf);
sendto_one_nickcmd(cptr, acptr, buf);
if (acptr->user->away)
sendto_one(cptr, ":%s AWAY :%s", acptr->name,
acptr->user->away);
send_user_joins(cptr, acptr);
return 0; /* their user lost, ignore the NICK */
}
}
return 0; /* just in case */
nickkilldone:
if (IsServer(sptr))
{
/* A server introducing a new client, change source */
sptr = make_client(cptr, serv);
add_client_to_list(sptr);
if (parc > 2)
sptr->hopcount = TS2ts(parv[2]);
if (parc > 3)
sptr->lastnick = TS2ts(parv[3]);
else /* Little bit better, as long as not all upgraded */
sptr->lastnick = TStime();
if (sptr->lastnick < 0)
{
sendto_realops
("Negative timestamp recieved from %s, resetting to TStime (%s)",
cptr->name, backupbuf);
sptr->lastnick = TStime();
}
newusr = 1;
}
else if (sptr->name[0] && IsPerson(sptr))
{
/*
** If the client belongs to me, then check to see
** if client is currently on any channels where it
** is currently banned. If so, do not allow the nick
** change to occur.
** Also set 'lastnick' to current time, if changed.
*/
if (MyClient(sptr))
{
for (mp = sptr->user->channel; mp; mp = mp->next)
{
if (!is_skochanop(sptr, mp->chptr) && is_banned(sptr, mp->chptr, BANCHK_NICK))
{
sendto_one(sptr,
err_str(ERR_BANNICKCHANGE),
me.name, parv[0],
mp->chptr->chname);
return 0;
}
if (CHECK_TARGET_NICK_BANS && !is_skochanop(sptr, mp->chptr) && is_banned_with_nick(sptr, mp->chptr, BANCHK_NICK, nick))
{
sendto_one(sptr,
":%s 437 %s %s :Cannot change to a nickname banned on channel",
me.name, parv[0],
mp->chptr->chname);
return 0;
}
if (!IsOper(sptr) && !IsULine(sptr)
&& mp->chptr->mode.mode & MODE_NONICKCHANGE
&& !is_chanownprotop(sptr, mp->chptr))
{
sendto_one(sptr,
err_str(ERR_NONICKCHANGE),
me.name, parv[0],
mp->chptr->chname);
return 0;
}
}
if (TStime() - sptr->user->flood.nick_t >= NICK_PERIOD)
{
sptr->user->flood.nick_t = TStime();
sptr->user->flood.nick_c = 1;
} else
sptr->user->flood.nick_c++;
sendto_snomask(SNO_NICKCHANGE, "*** Notice -- %s (%s@%s) has changed his/her nickname to %s",
sptr->name, sptr->user->username, sptr->user->realhost, nick);
RunHook2(HOOKTYPE_LOCAL_NICKCHANGE, sptr, nick);
} else {
if (!IsULine(sptr))
sendto_snomask(SNO_FNICKCHANGE, "*** Notice -- %s (%s@%s) has changed his/her nickname to %s",
sptr->name, sptr->user->username, sptr->user->realhost, nick);
RunHook3(HOOKTYPE_REMOTE_NICKCHANGE, cptr, sptr, nick);
}
/*
* Client just changing his/her nick. If he/she is
* on a channel, send note of change to all clients
* on that channel. Propagate notice to other servers.
*/
if (mycmp(parv[0], nick) ||
/* Next line can be removed when all upgraded --Run */
(!MyClient(sptr) && parc > 2
&& TS2ts(parv[2]) < sptr->lastnick))
sptr->lastnick = (MyClient(sptr)
|| parc < 3) ? TStime() : TS2ts(parv[2]);
if (sptr->lastnick < 0)
{
sendto_realops("Negative timestamp (%s)", backupbuf);
sptr->lastnick = TStime();
}
add_history(sptr, 1);
sendto_common_channels(sptr, ":%s NICK :%s", parv[0], nick);
sendto_serv_butone_token(cptr, parv[0], MSG_NICK, TOK_NICK,
"%s %ld", nick, sptr->lastnick);
if (removemoder)
sptr->umodes &= ~UMODE_REGNICK;
}
else if (!sptr->name[0])
{
#ifdef NOSPOOF
/*
* Client setting NICK the first time.
*
* Generate a random string for them to pong with.
*/
sptr->nospoof = getrandom32();
if (PINGPONG_WARNING)
sendto_one(sptr, ":%s NOTICE %s :*** If you are having problems"
" connecting due to ping timeouts, please"
" type /quote pong %X or /raw pong %X now.",
me.name, nick, sptr->nospoof, sptr->nospoof);
sendto_one(sptr, "PING :%X", sptr->nospoof);
#endif /* NOSPOOF */
#ifdef CONTACT_EMAIL
sendto_one(sptr,
":%s NOTICE %s :*** If you need assistance with a"
" connection problem, please email " CONTACT_EMAIL
" with the name and version of the client you are"
" using, and the server you tried to connect to: %s",
me.name, nick, me.name);
#endif /* CONTACT_EMAIL */
#ifdef CONTACT_URL
sendto_one(sptr,
":%s NOTICE %s :*** If you need assistance with"
" connecting to this server, %s, please refer to: "
CONTACT_URL, me.name, nick, me.name);
#endif /* CONTACT_URL */
/* Copy password to the passwd field if it's given after NICK
* - originally by taz, modified by Wizzu
*/
if ((parc > 2) && (strlen(parv[2]) <= PASSWDLEN)
&& !(sptr->listener->umodes & LISTENER_JAVACLIENT))
{
if (sptr->passwd)
MyFree(sptr->passwd);
sptr->passwd = MyMalloc(strlen(parv[2]) + 1);
(void)strcpy(sptr->passwd, parv[2]);
}
/* This had to be copied here to avoid problems.. */
(void)strcpy(sptr->name, nick);
if (sptr->user && IsNotSpoof(sptr))
{
/*
** USER already received, now we have NICK.
** *NOTE* For servers "NICK" *must* precede the
** user message (giving USER before NICK is possible
** only for local client connection!). register_user
** may reject the client and call exit_client for it
** --must test this and exit m_nick too!!!
*/
#ifndef NOSPOOF
if (USE_BAN_VERSION && MyConnect(sptr))
sendto_one(sptr, ":IRC!IRC@%s PRIVMSG %s :\1VERSION\1",
me.name, nick);
#endif
sptr->lastnick = TStime(); /* Always local client */
if (register_user(cptr, sptr, nick,
sptr->user->username, NULL, NULL, NULL) == FLUSH_BUFFER)
return FLUSH_BUFFER;
strcpy(nick, sptr->name); /* don't ask, but I need this. do not remove! -- Syzop */
update_watch = 0;
newusr = 1;
}
}
/*
* Finally set new nick name.
*/
if (update_watch && sptr->name[0])
{
(void)del_from_client_hash_table(sptr->name, sptr);
if (IsPerson(sptr))
hash_check_watch(sptr, RPL_LOGOFF);
}
(void)strcpy(sptr->name, nick);
(void)add_to_client_hash_table(nick, sptr);
if (IsServer(cptr) && parc > 7)
{
parv[3] = nick;
do_cmd(cptr, sptr, "USER", parc - 3, &parv[3]);
if (GotNetInfo(cptr) && !IsULine(sptr))
sendto_fconnectnotice(sptr->name, sptr->user, sptr, 0, NULL);
}
else if (IsPerson(sptr) && update_watch)
hash_check_watch(sptr, RPL_LOGON);
#ifdef NEWCHFLOODPROT
if (sptr->user && !newusr && !IsULine(sptr))
{
for (mp = sptr->user->channel; mp; mp = mp->next)
{
aChannel *chptr = mp->chptr;
if (chptr && !(mp->flags & (CHFL_CHANOP|CHFL_VOICE|CHFL_CHANOWNER|CHFL_HALFOP|CHFL_CHANPROT)) &&
chptr->mode.floodprot && do_chanflood(chptr->mode.floodprot, FLD_NICK) && MyClient(sptr))
{
do_chanflood_action(chptr, FLD_NICK, "nick");
}
}
}
#endif
if (newusr && !MyClient(sptr) && IsPerson(sptr))
{
RunHook(HOOKTYPE_REMOTE_CONNECT, sptr);
}
return 0;
}
/*
* Exit one client, local or remote. Assuming all dependants have
* been already removed, and socket closed for local client.
*/
static void
exit_one_client(aClient *cptr, aClient *sptr, aClient *from, char *comment)
{
Link *lp;
/*
* For a server or user quitting, propogate the information to
* other servers (except to the one where is came from (cptr))
*/
if (IsMe(sptr))
{
sendto_ops("ERROR: tried to exit me! : %s", comment);
return; /* ...must *never* exit self!! */
}
else if (IsServer(sptr))
{
#ifdef ALWAYS_SEND_DURING_SPLIT
currently_processing_netsplit = YES;
#endif
exit_server(cptr, sptr, from, comment);
#ifdef ALWAYS_SEND_DURING_SPLIT
currently_processing_netsplit = NO;
#endif
return;
}
else if (!(IsPerson(sptr)))
/*
* ...this test is *dubious*, would need * some thought.. but for
* now it plugs a * nasty hole in the server... --msa
*/
; /* Nothing */
else if (sptr->name[0])
{
/* ...just clean all others with QUIT... */
/*
* If this exit is generated from "m_kill", then there is no
* sense in sending the QUIT--KILL's have been sent instead.
*/
if ((sptr->flags & FLAGS_KILLED) == 0)
{
sendto_serv_butone(cptr, ":%s QUIT :%s",
sptr->name, comment);
}
/*
* * If a person is on a channel, send a QUIT notice * to every
* client (person) on the same channel (so * that the client can
* show the "**signoff" message). * (Note: The notice is to the
* local clients *only*)
*/
if (sptr->user)
{
send_part_to_common_channels(sptr, comment);
send_quit_to_common_channels(sptr, comment);
while ((lp = sptr->user->channel))
remove_user_from_channel(sptr, lp->value.chptr);
clones_remove(sptr);
#ifdef RWHO_PROBABILITY
probability_remove(sptr);
#endif
/* Clean up invitefield */
while ((lp = sptr->user->invited))
del_invite(sptr, lp->value.chptr);
/* Clean up silences */
while ((lp = sptr->user->silence))
del_silence(sptr, lp->value.cp);
remove_dcc_references(sptr);
/* again, this is all that is needed */
}
}
/* Remove sptr from the client list */
if (del_from_client_hash_table(sptr->name, sptr) != 1)
{
Debug((DEBUG_ERROR, "%#x !in tab %s[%s] %#x %#x %#x %d %d %#x",
sptr, sptr->name,
sptr->from ? sptr->from->sockhost : "??host",
sptr->from, sptr->next, sptr->prev, sptr->fd,
sptr->status, sptr->user));
}
/* remove user from watchlists */
if(IsRegistered(sptr))
hash_check_watch(sptr, RPL_LOGOFF);
remove_client_from_list(sptr);
return;
}
void
exit_one_server(aClient *cptr, aClient *dead, aClient *from,
aClient *lcptr, char *spinfo, char *comment)
{
aClient *acptr, *next;
DLink *lp;
/* okay, this is annoying.
* first off, we need two loops.
* one: to remove all the clients.
* two: to remove all the servers.
* HOWEVER! removing a server may cause removal of more servers
* and more clients.
* and this may make our pointer to next bad. therefore, we have to restart
* the server loop each time we find a server.
* We _NEED_ two different loops: all clients must be removed "
* before the server is
* removed. Otherwise, bad things (tm) can happen.
*/
Debug((DEBUG_NOTICE, "server noquit: %s", cptr->name));
for (acptr = client; acptr; acptr = next)
{
next = acptr->next; /* we might destroy this client record
* in the loop. */
if(acptr->uplink != cptr || !IsPerson(acptr))
continue;
exit_one_client_in_split(acptr, dead, spinfo);
}
for (acptr = client; acptr; acptr = next)
{
next = acptr->next; /* we might destroy this client record in
* the loop. */
if(acptr->uplink != cptr || !IsServer(acptr))
continue;
exit_one_server(acptr, dead, from, lcptr, spinfo, comment);
next = client; /* restart the loop */
}
Debug((DEBUG_NOTICE, "done exiting server: %s", cptr->name));
for (lp = server_list; lp; lp = lp->next)
{
acptr = lp->value.cptr;
if (acptr == cptr || IsMe(acptr) ||
acptr == dead || acptr == lcptr)
continue;
/* if the server is noquit, we only want to send it
* information about 'dead'
* if it's not, this server gets split information for ALL
* dead servers.
*/
#ifdef NOQUIT
if(IsNoquit(acptr))
#endif
if(cptr != dead)
continue;
if (cptr->from == acptr) /* "upstream" squit */
sendto_one(&me, acptr, ":%s SQUIT %s :%s", from->name, cptr->name,
comment);
else
sendto_one(&me, acptr, "SQUIT %s :%s", cptr->name, comment);
}
del_from_client_hash_table(cptr->name, cptr);
hash_check_watch(cptr, RPL_LOGOFF);
remove_client_from_list(cptr);
}
/*
* m_nick
* parv[0] = sender prefix
* parv[1] = nickname
* parv[2] = hopcount when new user; TS when nick change
* parv[3] = TS
* ---- new user only below ----
* parv[4] = umode
* parv[5] = username
* parv[6] = hostname
* parv[7] = server
* parv[8] = serviceid
* parv[9] = IP
* parv[10] = ircname
* -- endif
*/
int m_nick(aClient *cptr, aClient *sptr, int parc, char *parv[])
{
struct simBan *ban;
aClient *acptr, *uplink;
Link *lp, *lp2;
char nick[NICKLEN + 2];
ts_val newts = 0;
int sameuser = 0, samenick = 0;
if (parc < 2)
{
sendto_one(sptr, err_str(ERR_NONICKNAMEGIVEN),
me.name, parv[0]);
return 0;
}
if (!IsServer(sptr) && IsServer(cptr) && parc > 2)
newts = atol(parv[2]);
else if (IsServer(sptr) && parc > 3)
newts = atol(parv[3]);
else
parc = 2;
/*
* parc == 2 on a normal client sign on (local) and a normal client
* nick change
* parc == 4 on a normal server-to-server client nick change
* parc == 11 on a normal TS style server-to-server NICK introduction
*/
if ((IsServer(sptr) || (parc > 4)) && (parc < 11))
{
/*
* We got the wrong number of params. Someone is trying to trick
* us. Kill it. -ThemBones As discussed with ThemBones, not much
* point to this code now sending a whack of global kills would
* also be more annoying then its worth, just note the problem,
* and continue -Dianora
*/
sendto_realops("IGNORING BAD NICK: %s[%s@%s] on %s (from %s)", parv[1],
(parc >= 6) ? parv[5] : "-",
(parc >= 7) ? parv[6] : "-",
(parc >= 8) ? parv[7] : "-", parv[0]);
return 0;
}
strncpyzt(nick, parv[1], NICKLEN + 1);
/*
* if do_nick_name() returns a null name OR if the server sent a
* nick name and do_nick_name() changed it in some way (due to rules
* of nick creation) then reject it. If from a server and we reject
* it, and KILL it. -avalon 4/4/92
*/
if (do_nick_name(nick) == 0 || (IsServer(cptr) && strcmp(nick, parv[1])))
{
sendto_one(sptr, err_str(ERR_ERRONEUSNICKNAME),
me.name, parv[0], parv[1], "Erroneous Nickname");
if (IsServer(cptr))
{
ircstp->is_kill++;
sendto_realops_lev(DEBUG_LEV, "Bad Nick: %s From: %s Via: %s",
parv[1], parv[0],
get_client_name(cptr, HIDEME));
sendto_one(cptr, ":%s KILL %s :%s (Bad Nick)",
me.name, parv[1], me.name);
if (sptr != cptr) { /* bad nick change */
sendto_serv_butone(cptr, ":%s KILL %s :%s (Bad Nick)", me.name,
parv[0], me.name);
sptr->flags |= FLAGS_KILLED;
return exit_client(cptr, sptr, &me, "BadNick");
}
}
return 0;
}
/*
* Check against nick name collisions.
*
* Put this 'if' here so that the nesting goes nicely on the screen
* :) We check against server name list before determining if the
* nickname is present in the nicklist (due to the way the below
* for loop is constructed). -avalon
*/
do
{
if ((acptr = find_server(nick, NULL)))
if (MyConnect(sptr))
{
sendto_one(sptr, err_str(ERR_NICKNAMEINUSE), me.name,
BadPtr(parv[0]) ? "*" : parv[0], nick);
return 0;
}
/*
* acptr already has result from find_server
* Well. unless we have a capricious server on the net, a nick can
* never be the same as a server name - Dianora
* That's not the only case; maybe someone broke do_nick_name
* or changed it so they could use "." in nicks on their network
* - sedition
*/
if (acptr)
{
/*
* We have a nickname trying to use the same name as a
* server. Send out a nick collision KILL to remove the
* nickname. As long as only a KILL is sent out, there is no
* danger of the server being disconnected. Ultimate way to
* jupiter a nick ? >;-). -avalon
*/
sendto_realops_lev(SKILL_LEV, "Nick collision on %s", sptr->name);
ircstp->is_kill++;
sendto_one(cptr, ":%s KILL %s :%s (Nick Collision)", me.name,
sptr->name, me.name);
sptr->flags |= FLAGS_KILLED;
return exit_client(cptr, sptr, &me, "Nick/Server collision");
}
if (!(acptr = find_client(nick, NULL)))
break;
/*
* If acptr == sptr, then we have a client doing a nick change
* between *equivalent* nicknames as far as server is concerned
* (user is changing the case of his/her nickname or somesuch)
*/
if (acptr == sptr)
{
if (strcmp(acptr->name, nick) == 0)
return 0;
else
break;
} /* If user is changing nick to itself no point in propogating */
/*
* Note: From this point forward it can be assumed that acptr !=
* sptr (point to different client structures).
*
* If the older one is "non-person", the new entry is just
* allowed to overwrite it. Just silently drop non-person, and
* proceed with the nick. This should take care of the "dormant
* nick" way of generating collisions...
*/
if (IsUnknown(acptr))
{
if (MyConnect(acptr))
{
exit_client(NULL, acptr, &me, "Overridden");
break;
}
else if (!(acptr->user))
{
sendto_realops_lev(SKILL_LEV, "Nick Collision on %s", parv[1]);
sendto_serv_butone(NULL, ":%s KILL %s :%s (Nick Collision)",
me.name, acptr->name, me.name);
acptr->flags |= FLAGS_KILLED;
/* Having no USER struct should be ok... */
return exit_client(cptr, acptr, &me,
"Got TS NICK before Non-TS USER");
}
}
if (!IsServer(cptr))
{
/*
* NICK is coming from local client connection. Just send
* error reply and ignore the command.
* parv[0] is empty on connecting clients
*/
sendto_one(sptr, err_str(ERR_NICKNAMEINUSE),
me.name, BadPtr(parv[0]) ? "*" : parv[0], nick);
return 0;
}
/*
* NICK was coming from a server connection. Means that the same
* nick is registered for different users by different server.
* This is either a race condition (two users coming online about
* same time, or net reconnecting) or just two net fragments
* becoming joined and having same nicks in use. We cannot have
* TWO users with same nick--purge this NICK from the system with
* a KILL... >;)
*
* Changed to something reasonable like IsServer(sptr) (true if
* "NICK new", false if ":old NICK new") -orabidoo
*/
if (IsServer(sptr))
{
/*
* A new NICK being introduced by a neighbouring server (e.g.
* message type "NICK new" received)
*/
if (!newts || !acptr->tsinfo || (newts == acptr->tsinfo))
{
sendto_realops_lev(SKILL_LEV, "Nick collision on %s", parv[1]);
ircstp->is_kill++;
sendto_one(acptr, err_str(ERR_NICKCOLLISION),
me.name, acptr->name, acptr->name);
sendto_serv_butone(NULL, ":%s KILL %s :%s (Nick Collision)",
me.name, acptr->name, me.name);
acptr->flags |= FLAGS_KILLED;
return exit_client(cptr, acptr, &me, "Nick collision");
}
else
{
/* XXX This looks messed up to me XXX - Raist */
sameuser = (acptr->user) &&
mycmp(acptr->user->username, parv[5]) == 0 &&
mycmp(acptr->user->host, parv[6]) == 0;
if ((sameuser && newts < acptr->tsinfo) ||
(!sameuser && newts > acptr->tsinfo))
{
return 0;
}
else
{
sendto_realops_lev(SKILL_LEV, "Nick collision on %s",parv[1]);
ircstp->is_kill++;
sendto_one(acptr, err_str(ERR_NICKCOLLISION),
me.name, acptr->name, acptr->name);
sendto_serv_butone(sptr, ":%s KILL %s :%s (Nick Collision)",
me.name, acptr->name, me.name);
acptr->flags |= FLAGS_KILLED;
(void) exit_client(cptr, acptr, &me, "Nick collision");
break;
}
}
}
/*
* * A NICK change has collided (e.g. message type * ":old NICK
* new". This requires more complex cleanout. * Both clients must be
* purged from this server, the "new" * must be killed from the
* incoming connection, and "old" must * be purged from all outgoing
* connections.
*/
if (!newts || !acptr->tsinfo || (newts == acptr->tsinfo) ||
!sptr->user)
{
sendto_realops_lev(SKILL_LEV, "Nick change collision: %s", parv[1]);
ircstp->is_kill++;
sendto_one(acptr, err_str(ERR_NICKCOLLISION),
me.name, acptr->name, acptr->name);
sendto_serv_butone(NULL, ":%s KILL %s :%s (Nick Collision)",me.name,
sptr->name, me.name);
ircstp->is_kill++;
sendto_serv_butone(NULL, ":%s KILL %s :%s (Nick Collision)",me.name,
acptr->name, me.name);
acptr->flags |= FLAGS_KILLED;
(void) exit_client(NULL, acptr, &me, "Nick collision(new)");
sptr->flags |= FLAGS_KILLED;
return exit_client(cptr, sptr, &me, "Nick collision(old)");
}
else
{
/* XXX This looks messed up XXX */
sameuser = mycmp(acptr->user->username, sptr->user->username) == 0
&& mycmp(acptr->user->host, sptr->user->host) == 0;
if ((sameuser && newts < acptr->tsinfo) ||
(!sameuser && newts > acptr->tsinfo)) {
if (sameuser)
sendto_realops_lev(SKILL_LEV,
"Nick change collision from %s to %s",
sptr->name, acptr->name);
ircstp->is_kill++;
sendto_serv_butone(cptr, ":%s KILL %s :%s (Nick Collision)", me.name,
sptr->name, me.name);
sptr->flags |= FLAGS_KILLED;
if (sameuser)
return exit_client(cptr, sptr, &me, "Nick collision(old)");
else
return exit_client(cptr, sptr, &me, "Nick collision(new)");
}
else
{
sendto_realops_lev(SKILL_LEV, "Nick collision on %s", acptr->name);
ircstp->is_kill++;
sendto_one(acptr, err_str(ERR_NICKCOLLISION),
me.name, acptr->name, acptr->name);
sendto_serv_butone(sptr, ":%s KILL %s :%s (Nick Collision)",me.name,
acptr->name, me.name);
acptr->flags |= FLAGS_KILLED;
(void) exit_client(cptr, acptr, &me, "Nick collision");
}
}
} while (0);
if (IsServer(sptr))
{
uplink = find_server(parv[7], NULL);
if(!uplink)
{
/* if we can't find the server this nick is on,
* complain loudly and ignore it. - lucas */
sendto_realops("Remote nick %s on UNKNOWN server %s",
nick, parv[7]);
return 0;
}
sptr = make_client(cptr, uplink);
/* If this is on a U: lined server, it's a U: lined client. */
if(IsULine(uplink))
sptr->flags|=FLAGS_ULINE;
add_client_to_list(sptr);
if (parc > 2)
sptr->hopcount = atoi(parv[2]);
if (newts)
{
sptr->tsinfo = newts;
}
else
{
newts = sptr->tsinfo = (ts_val) timeofday;
ts_warn("Remote nick %s introduced without a TS", nick);
}
/* copy the nick in place */
(void) strcpy(sptr->name, nick);
(void) add_to_client_hash_table(nick, sptr);
if (parc >= 10)
{
int *s, flag;
char *m;
/* parse the usermodes -orabidoo */
m = &parv[4][1];
while (*m)
{
for (s = user_modes; (flag = *s); s += 2)
if (*m == *(s + 1))
{
if ((flag == UMODE_o) || (flag == UMODE_O))
Count.oper++;
sptr->umode |= flag & SEND_UMODES;
break;
}
m++;
}
if (parc==10)
{
return do_user(nick, cptr, sptr, parv[5], parv[6],
parv[7], strtoul(parv[8], NULL, 0),
"0.0.0.0", parv[9]);
} else if (parc==11)
{
return do_user(nick, cptr, sptr, parv[5], parv[6], parv[7],
strtoul(parv[8], NULL, 0),
parv[9], parv[10]);
}
}
}
else if (sptr->name[0])
{
#ifdef DONT_CHECK_QLINE_REMOTE
if (MyConnect(sptr))
{
#endif
if ((ban = check_mask_simbanned(nick, SBAN_NICK)))
{
#ifndef DONT_CHECK_QLINE_REMOTE
if (!MyConnect(sptr))
sendto_realops("Restricted nick %s from %s on %s", nick,
(*sptr->name != 0 && !IsServer(sptr)) ?
sptr->name : "<unregistered>",
(sptr->user == NULL) ? ((IsServer(sptr)) ?
parv[6] : me.name) :
sptr->user->server);
#endif
if (MyConnect(sptr) && (!IsServer(cptr)) && (!IsOper(cptr))
&& (!IsULine(sptr)))
{
sendto_one(sptr, err_str(ERR_ERRONEUSNICKNAME), me.name,
BadPtr(parv[0]) ? "*" : parv[0], nick,
BadPtr(ban->reason) ? "Erroneous Nickname" :
ban->reason);
if (call_hooks(CHOOK_FORBID, cptr, nick, ban) != FLUSH_BUFFER)
sendto_realops_lev(REJ_LEV,
"Forbidding restricted nick %s from %s",
nick, get_client_name(cptr, FALSE));
return 0;
}
}
#ifdef DONT_CHECK_QLINE_REMOTE
}
#endif
if (MyConnect(sptr))
{
if (IsRegisteredUser(sptr))
{
/* before we change their nick, make sure they're not banned
* on any channels, and!! make sure they're not changing to
* a banned nick -sed */
/* a little cleaner - lucas */
for (lp = sptr->user->channel; lp; lp = lp->next)
{
if (can_send(sptr, lp->value.chptr, NULL))
{
sendto_one(sptr, err_str(ERR_BANNICKCHANGE), me.name,
sptr->name, lp->value.chptr->chname);
return 0;
}
if (nick_is_banned(lp->value.chptr, nick, sptr) != NULL)
{
sendto_one(sptr, err_str(ERR_BANONCHAN), me.name,
sptr->name, nick, lp->value.chptr->chname);
return 0;
}
}
#ifdef ANTI_NICK_FLOOD
if ((sptr->last_nick_change + MAX_NICK_TIME) < NOW)
sptr->number_of_nick_changes = 0;
sptr->last_nick_change = NOW;
sptr->number_of_nick_changes++;
if (sptr->number_of_nick_changes > MAX_NICK_CHANGES &&
!IsAnOper(sptr))
{
sendto_one(sptr,
":%s NOTICE %s :*** Notice -- Too many nick "
"changes. Wait %d seconds before trying again.",
me.name, sptr->name, MAX_NICK_TIME);
return 0;
}
#endif
/* If it changed nicks, -r it */
if ((sptr->umode & UMODE_r) && (mycmp(parv[0], nick) != 0))
{
unsigned int oldumode;
char mbuf[BUFSIZE];
oldumode = sptr->umode;
sptr->umode &= ~UMODE_r;
send_umode(sptr, sptr, oldumode, ALL_UMODES, mbuf);
}
/* LOCAL NICKHANGE */
/*
* Client just changing his/her nick. If he/she is on a
* channel, send note of change to all clients on that channel.
* Propagate notice to other servers.
*/
/* if the nickname is different, set the TS */
if (mycmp(parv[0], nick))
{
sptr->tsinfo = newts ? newts : (ts_val) timeofday;
}
sendto_common_channels(sptr, ":%s NICK :%s", parv[0],
nick);
if (sptr->user)
{
add_history(sptr, 1);
sendto_serv_butone(cptr, ":%s NICK %s :%ld",
parv[0], nick, sptr->tsinfo);
}
}
}
else
{
/* REMOTE NICKCHANGE */
/*
* Client just changing his/her nick. If he/she is on a
* channel, send note of change to all clients on that channel.
* Propagate notice to other servers.
*/
/* if the nickname is different, set the TS */
if (mycmp(parv[0], nick))
{
sptr->tsinfo = newts ? newts : (ts_val) timeofday;
}
sendto_common_channels(sptr, ":%s NICK :%s", parv[0], nick);
if (sptr->user)
{
add_history(sptr, 1);
sendto_serv_butone(cptr, ":%s NICK %s :%ld",
parv[0], nick, sptr->tsinfo);
}
/* If it changed nicks, -r it */
if (mycmp(parv[0], nick))
sptr->umode &= ~UMODE_r;
/*
* Flush the banserial for the channels the user is in, since this
* could be a SVSNICK induced nick change, which overrides any ban
* checking on the originating server.
*/
flush_user_banserial(sptr);
}
/* Remove dccallow entries for users who don't share common channel(s) unless they only change their nick capitalization -Kobi_S */
if(sptr->user && mycmp(parv[0], nick))
{
for(lp = sptr->user->dccallow; lp; lp = lp2)
{
lp2 = lp->next;
if(lp->flags == DCC_LINK_ME)
continue;
if(!find_shared_chan(sptr, lp->value.cptr))
{
sendto_one(lp->value.cptr, ":%s %d %s :%s has been removed from "
"your DCC allow list for signing off",
me.name, RPL_DCCINFO, lp->value.cptr->name, parv[0]);
del_dccallow(lp->value.cptr, sptr, 1);
}
}
}
}
else
{
/* Client setting NICK the first time */
if (MyConnect(sptr))
{
if ((ban = check_mask_simbanned(nick, SBAN_NICK)))
{
if (MyConnect(sptr) && (!IsServer(cptr)) && (!IsOper(cptr))
&& (!IsULine(sptr)))
{
sendto_one(sptr, err_str(ERR_ERRONEUSNICKNAME), me.name,
BadPtr(parv[0]) ? "*" : parv[0], nick,
BadPtr(ban->reason) ? "Erroneous Nickname" :
ban->reason);
if (call_hooks(CHOOK_FORBID, cptr, nick, ban) != FLUSH_BUFFER)
sendto_realops_lev(REJ_LEV,
"Forbidding restricted nick %s from %s", nick,
get_client_name(cptr, FALSE));
return 0;
}
}
}
strcpy(sptr->name, nick);
sptr->tsinfo = timeofday;
if (sptr->user)
{
/* USER already received, now we have NICK */
if (register_user(cptr, sptr, nick, sptr->user->username, NULL)
== FLUSH_BUFFER)
return FLUSH_BUFFER;
}
}
/* Finally set new nick name. */
if (sptr->name[0])
{
del_from_client_hash_table(sptr->name, sptr);
samenick = mycmp(sptr->name, nick) ? 0 : 1;
if (IsPerson(sptr))
{
if (!samenick)
hash_check_watch(sptr, RPL_LOGOFF);
#ifdef RWHO_PROBABILITY
probability_change(sptr->name, nick);
#endif
}
}
strcpy(sptr->name, nick);
add_to_client_hash_table(nick, sptr);
if (IsPerson(sptr) && !samenick)
hash_check_watch(sptr, RPL_LOGON);
return 0;
}
/*
** Exit one client, local or remote. Assuming all dependants have
** been already removed, and socket closed for local client.
*/
static void exit_one_client(aClient *cptr, aClient *sptr, aClient *from,
const char *comment)
{
Reg aClient *acptr;
Reg int i;
Reg Link *lp;
invLink *ilp;
/*
** For a server or user quitting, propagage the information to
** other servers (except to the one where is came from (cptr))
*/
if (IsMe(sptr))
{
sendto_flag(SCH_ERROR,
"ERROR: tried to exit me! : %s", comment);
return; /* ...must *never* exit self!! */
}
else if (IsServer(sptr))
{
/*
** Old sendto_serv_but_one() call removed because we now
** need to send different names to different servers
** (domain name matching)
*/
if (!IsMasked(sptr))
{
istat.is_serv--;
}
if (!IsBursting(sptr))
{
istat.is_eobservers--;
}
for (i = fdas.highest; i >= 0; i--)
{
if (!(acptr = local[fdas.fd[i]]) || !IsServer(acptr) ||
acptr == cptr || IsMe(acptr))
{
continue;
}
if (!(sptr->flags & FLAGS_SQUIT))
{
/* Make sure we only send the last SQUIT
** to a 2.11. */
continue;
}
if ((acptr->flags & FLAGS_HIDDEN) &&
!IsMasked(sptr))
{
/* We need a special SQUIT reason, so
** the remote server can send the
** right quit message. */
sendto_one(acptr, ":%s SQUIT %s :%s %s",
sptr->serv->up->serv->sid,
sptr->serv->sid,
sptr->serv->up->name,
sptr->name);
}
else
{
sendto_one(acptr, ":%s SQUIT %s :%s",
sptr->serv->up->serv->sid,
sptr->serv->sid, comment);
}
}
#ifdef USE_SERVICES
check_services_butone(SERVICE_WANT_SQUIT, sptr->serv, sptr,
":%s SQUIT %s :%s", from->name,
sptr->name, comment);
#endif
del_from_sid_hash_table(sptr->serv);
remove_server_from_tree(sptr);
/* remove server from svrtop */
unregister_server(sptr);
}
else if (!IsPerson(sptr) && !IsService(sptr))
{
/* ...this test is *dubious*, would need
** some thougth.. but for now it plugs a
** nasty hole in the server... --msa
*/
; /* Nothing */
}
else if (sptr->name[0] && !IsService(sptr)) /* clean with QUIT... */
{
/*
** If this exit is generated from "m_kill", then there
** is no sense in sending the QUIT--KILL's have been
** sent instead.
*/
if ((sptr->flags & FLAGS_KILLED) == 0)
{
if ((sptr->flags & FLAGS_SPLIT) == 0)
{
sendto_serv_butone(cptr, ":%s QUIT :%s",
sptr->user->uid, comment);
#ifdef USE_SERVICES
check_services_butone(SERVICE_WANT_QUIT|
SERVICE_WANT_RQUIT,
(sptr->user) ?
sptr->user->servp
: NULL, cptr,
":%s QUIT :%s",
sptr->name, comment);
#endif
}
else
{
if (sptr->flags & FLAGS_HIDDEN)
/* joys of hostmasking */
for (i = fdas.highest; i >= 0; i--)
{
if (!(acptr =local[fdas.fd[i]])
|| acptr == cptr
|| IsMe(acptr))
continue;
if (acptr->flags & FLAGS_HIDDEN)
sendto_one(acptr,
":%s QUIT :%s",
sptr->user->uid,
comment);
}
#ifdef USE_SERVICES
check_services_butone(SERVICE_WANT_QUIT,
(sptr->user) ? sptr->user->servp
: NULL, cptr,
":%s QUIT :%s",
sptr->name, comment);
#endif
}
}
#ifdef USE_SERVICES
else
{
/* Send QUIT to services which desire such as well.
** Services with both _QUIT and _KILL will get both
** for now --jv
*/
check_services_butone(SERVICE_WANT_QUIT,
(sptr->user) ? sptr->user->servp
: NULL, cptr,
":%s QUIT :%s",
sptr->name, comment);
}
#endif
/*
** If a person is on a channel, send a QUIT notice
** to every client (person) on the same channel (so
** that the client can show the "**signoff" message).
** (Note: The notice is to the local clients *only*)
*/
if (sptr->user)
{
if (IsInvisible(sptr))
{
istat.is_user[1]--;
sptr->user->servp->usercnt[1]--;
}
else
{
istat.is_user[0]--;
sptr->user->servp->usercnt[0]--;
}
if (IsAnOper(sptr))
{
sptr->user->servp->usercnt[2]--;
istat.is_oper--;
}
sendto_common_channels(sptr, ":%s QUIT :%s",
sptr->name, comment);
if (!(acptr = cptr ? cptr : sptr->from))
acptr = sptr;
while ((lp = sptr->user->channel))
{
/*
** Mark channels from where remote chop left,
** this will eventually lock the channel.
** close_connection() has already been called,
** it makes MyConnect == False - krys
*/
if (sptr != cptr)
{
if (*lp->value.chptr->chname == '!')
{
if (!(sptr->flags &FLAGS_QUIT))
lp->value.chptr->history = timeofday + LDELAYCHASETIMELIMIT;
}
else if (
#ifndef BETTER_CDELAY
!(sptr->flags & FLAGS_QUIT) &&
#endif
is_chan_op(sptr, lp->value.chptr))
{
lp->value.chptr->history = timeofday + DELAYCHASETIMELIMIT;
}
}
if (IsAnonymous(lp->value.chptr) &&
!IsQuiet(lp->value.chptr))
{
sendto_channel_butserv(lp->value.chptr, sptr, ":%s PART %s :None", sptr->name, lp->value.chptr->chname);
}
remove_user_from_channel(sptr,lp->value.chptr);
}
/* Clean up invitefield */
while ((ilp = sptr->user->invited))
{
del_invite(sptr, ilp->chptr);
/* again, this is all that is needed */
}
/* remove from uid hash table */
if (sptr->user)
{
del_from_uid_hash_table(sptr->user->uid, sptr);
}
/* Add user to history */
#ifndef BETTER_NDELAY
add_history(sptr, (sptr->flags & FLAGS_QUIT) ?
&me : NULL);
#else
add_history(sptr, (sptr == cptr) ? &me : NULL);
#endif
off_history(sptr);
#ifdef USE_HOSTHASH
del_from_hostname_hash_table(sptr->user->host,
sptr->user);
#endif
#ifdef USE_IPHASH
del_from_ip_hash_table(sptr->user->sip, sptr->user);
#endif
}
}
else if (sptr->name[0] && IsService(sptr))
{
/*
** If this exit is generated from "m_kill", then there
** is no sense in sending the QUIT--KILL's have been
** sent instead.
*/
if ((sptr->flags & FLAGS_KILLED) == 0)
{
/*
** A service quitting is annoying, It has to be sent
** to connected servers depending on
** sptr->service->dist
*/
for (i = fdas.highest; i >= 0; i--)
{
if (!(acptr = local[fdas.fd[i]])
|| !IsServer(acptr) || acptr == cptr
|| IsMe(acptr))
{
continue;
}
if (match(sptr->service->dist, acptr->name) &&
match(sptr->service->dist, acptr->serv->sid))
{
continue;
}
sendto_one(acptr, ":%s QUIT :%s", sptr->name,
comment);
}
}
#ifdef USE_SERVICES
check_services_butone(SERVICE_WANT_SERVICE, NULL, NULL,
":%s QUIT :%s", sptr->name, comment);
#endif
/* MyConnect(sptr) is always FALSE here */
if (cptr == sptr)
{
sendto_flag(SCH_NOTICE, "Service %s disconnected",
get_client_name(sptr, TRUE));
}
sendto_flag(SCH_SERVICE, "Received QUIT %s from %s (%s)",
sptr->name, from->name, comment);
istat.is_service--;
}
/* Remove sptr from the client list */
if (del_from_client_hash_table(sptr->name, sptr) != 1)
{
Debug((DEBUG_ERROR, "%#x !in tab %s[%s] %#x %#x %#x %d %d %#x",
sptr, sptr->name,
sptr->from ? sptr->from->sockhost : "??host",
sptr->from, sptr->next, sptr->prev, sptr->fd,
sptr->status, sptr->user));
}
remove_client_from_list(sptr);
return;
}
/*
** Exit one client, local or remote. Assuming all dependents have
** been already removed, and socket closed for local client.
*/
static void exit_one_client(struct Client *client_p,
struct Client *source_p,
struct Client *from, const char *comment)
{
struct Client* target_p;
dlink_node *lp;
dlink_node *next_lp;
if (IsServer(source_p))
{
if (source_p->servptr && source_p->servptr->serv)
del_client_from_llist(&(source_p->servptr->serv->servers),
source_p);
else
ts_warn("server %s without servptr!", source_p->name);
if(!IsMe(source_p))
remove_server_from_list(source_p);
}
else if (source_p->servptr && source_p->servptr->serv)
{
del_client_from_llist(&(source_p->servptr->serv->users), source_p);
}
/* there are clients w/o a servptr: unregistered ones */
/*
** For a server or user quitting, propogate the information to
** other servers (except to the one where is came from (client_p))
*/
if (IsMe(source_p))
{
sendto_realops_flags(FLAGS_ALL, L_ALL,
"ERROR: tried to exit me! : %s", comment);
return; /* ...must *never* exit self!! */
}
else if (IsServer(source_p))
{
/*
** Old sendto_serv_but_one() call removed because we now
** need to send different names to different servers
** (domain name matching)
*/
/*
** The bulk of this is done in remove_dependents now, all
** we have left to do is send the SQUIT upstream. -orabidoo
*/
if (source_p->localClient)
{
if(source_p->localClient->ctrlfd > -1)
{
fd_close(source_p->localClient->ctrlfd);
source_p->localClient->ctrlfd = -1;
#ifndef HAVE_SOCKETPAIR
fd_close(source_p->localClient->ctrlfd_r);
fd_close(source_p->localClient->fd_r);
source_p->localClient->ctrlfd_r = -1;
source_p->localClient->fd_r = -1;
#endif
}
}
target_p = source_p->from;
if (target_p && IsServer(target_p) && target_p != client_p && !IsMe(target_p) &&
(source_p->flags & FLAGS_KILLED) == 0)
sendto_one(target_p, ":%s SQUIT %s :%s", from->name, source_p->name, comment);
}
else if (source_p->name[0]) /* ...just clean all others with QUIT... */
{
/*
** If this exit is generated from "m_kill", then there
** is no sense in sending the QUIT--KILL's have been
** sent instead.
*/
if ((source_p->flags & FLAGS_KILLED) == 0)
{
sendto_server(client_p, source_p, NULL, NOCAPS, NOCAPS,
NOFLAGS, ":%s QUIT :%s", source_p->name, comment);
}
/*
** If a person is on a channel, send a QUIT notice
** to every client (person) on the same channel (so
** that the client can show the "**signoff" message).
** (Note: The notice is to the local clients *only*)
*/
if (source_p->user)
{
sendto_common_channels_local(source_p, ":%s!%s@%s QUIT :%s",
source_p->name,
source_p->username,
source_p->host,
comment);
for (lp = source_p->user->channel.head; lp; lp = next_lp)
{
next_lp = lp->next;
remove_user_from_channel(lp->data, source_p);
}
/* Should not be in any channels now */
assert(source_p->user->channel.head == NULL);
/* Clean up invitefield */
for (lp = source_p->user->invited.head; lp; lp = next_lp)
{
next_lp = lp->next;
del_invite(lp->data, source_p);
}
/* Clean up allow lists */
del_all_accepts(source_p);
add_history(source_p, 0);
off_history(source_p);
if (HasID(source_p))
del_from_id_hash_table(source_p->user->id, source_p);
/* again, this is all that is needed */
}
}
/*
* Remove source_p from the client lists
*/
del_from_client_hash_table(source_p->name, source_p);
/* remove from global client list */
remove_client_from_list(source_p);
/* Check to see if the client isn't already on the dead list */
assert(dlinkFind(&dead_list, source_p) == NULL);
/* add to dead client dlist */
lp = make_dlink_node();
SetDead(source_p);
dlinkAdd(source_p, lp, &dead_list);
}
/*
* change_local_nick
* inputs - pointer to server
* - pointer to client
* output -
* side effects - changes nick of a LOCAL user
*
*/
int change_local_nick(struct Client *client_p, struct Client *source_p,
char *nick)
{
/*
** Client just changing his/her nick. If he/she is
** on a channel, send note of change to all clients
** on that channel. Propagate notice to other servers.
*/
source_p->tsinfo = CurrentTime;
if((source_p->localClient->last_nick_change +
ConfigFileEntry.max_nick_time) < CurrentTime)
source_p->localClient->number_of_nick_changes = 0;
source_p->localClient->last_nick_change = CurrentTime;
source_p->localClient->number_of_nick_changes++;
if((ConfigFileEntry.anti_nick_flood &&
(source_p->localClient->number_of_nick_changes
<= ConfigFileEntry.max_nick_changes)) ||
!ConfigFileEntry.anti_nick_flood ||
(IsOper(source_p) && ConfigFileEntry.no_oper_flood))
{
sendto_realops_flags(FLAGS_NCHANGE, L_ALL,
"Nick change: From %s to %s [%s@%s]",
source_p->name, nick, source_p->username,
source_p->host);
sendto_common_channels_local(source_p, ":%s!%s@%s NICK :%s",
source_p->name, source_p->username, source_p->host,
nick);
if (source_p->user)
{
add_history(source_p, 1);
/* Only hubs care about lazy link nicks not being sent on yet
* lazylink leafs/leafs always send their nicks up to hub,
* hence must always propogate nick changes.
* hubs might not propogate a nick change, if the leaf
* does not know about that client yet.
*/
sendto_server(client_p, source_p, NULL, NOCAPS, NOCAPS,
NOFLAGS, ":%s NICK %s :%lu", source_p->name,
nick, (unsigned long) source_p->tsinfo);
}
}
else
{
sendto_one(source_p,
form_str(ERR_NICKTOOFAST),me.name, source_p->name,
source_p->name, nick, ConfigFileEntry.max_nick_time);
return 0;
}
/* Finally, add to hash */
del_from_client_hash_table(source_p->name, source_p);
strcpy(source_p->name, nick);
add_to_client_hash_table(nick, source_p);
/* Make sure everyone that has this client on its accept list
* loses that reference.
*/
del_all_accepts(source_p);
/* fd_desc is long enough */
fd_note(client_p->localClient->fd, "Nick: %s", nick);
return 1;
}
/*
* nick_from_server()
*/
static int
nick_from_server(struct Client *client_p, struct Client *source_p, int parc,
char *parv[], time_t newts, char *nick)
{
if(IsServer(source_p))
{
/* A server introducing a new client, change source */
source_p = make_client(client_p);
add_client_to_list(source_p);
if(parc > 2)
source_p->hopcount = atoi(parv[2]);
if(newts)
source_p->tsinfo = newts;
else
{
newts = source_p->tsinfo = CurrentTime;
ts_warn("Remote nick %s (%s) introduced without a TS", nick, parv[0]);
}
/* copy the nick in place */
(void) strcpy(source_p->name, nick);
(void) add_to_client_hash_table(nick, source_p);
if(parc > 8)
{
int flag;
char *m;
/* parse usermodes */
m = &parv[4][1];
while (*m)
{
flag = user_modes_from_c_to_bitmask[(unsigned char) *m];
if(!(source_p->umodes & UMODE_INVISIBLE)
&& (flag & UMODE_INVISIBLE))
Count.invisi++;
if(!(source_p->umodes & UMODE_OPER) && (flag & UMODE_OPER))
Count.oper++;
source_p->umodes |= flag & SEND_UMODES;
m++;
}
return do_remote_user(nick, client_p, source_p, parv[5], parv[6],
parv[7], (parc > 9)? parv[8] : NULL,
parv[(parc > 9)? 9 : 8]);
}
}
else if(source_p->name[0])
{
/* client changing their nick */
if(irccmp(parv[0], nick))
source_p->tsinfo = newts ? newts : CurrentTime;
sendto_common_channels_local(source_p, ":%s!%s@%s NICK :%s",
source_p->name, source_p->username, source_p->host,
nick);
if(source_p->user)
{
add_history(source_p, 1);
sendto_server(client_p, NULL, NOCAPS, NOCAPS,
":%s NICK %s :%lu",
parv[0], nick, (unsigned long) source_p->tsinfo);
}
}
/* set the new nick name */
if(source_p->name[0])
del_from_client_hash_table(source_p->name, source_p);
strcpy(source_p->name, nick);
add_to_client_hash_table(nick, source_p);
/* remove all accepts pointing to the client */
del_all_accepts(source_p);
return 0;
}
