2 * IRC - Internet Relay Chat, ircd/m_join.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
95 #include "ircd_chattr.h"
96 #include "ircd_reply.h"
97 #include "ircd_string.h"
100 #include "numnicks.h"
109 #if !defined(XXX_BOGUS_TEMP_HACK)
110 #include "handlers.h" /* m_names */
114 * Helper function to find last 0 in a comma-separated list of
118 last0(char *chanlist)
122 for (p = chanlist; p[0]; p++) /* find last "JOIN 0" */
123 if (p[0] == '0' && (p[1] == ',' || p[1] == '\0' || !IsChannelChar(p[1]))) {
124 chanlist = p; /* we'll start parsing here */
126 if (!p[1]) /* hit the end */
131 while (p[0] != ',' && p[0] != '\0') /* skip past channel name */
134 if (!p[0]) /* hit the end */
142 * Helper function to perform a JOIN 0 if needed; returns 0 if channel
143 * name is not 0, else removes user from all channels and returns 1.
146 join0(struct JoinBuf *join, struct Client *cptr, struct Client *sptr,
149 struct Membership *member;
152 /* is it a JOIN 0? */
153 if (chan[0] != '0' || chan[1] != '\0')
156 joinbuf_join(join, 0, 0); /* join special channel 0 */
158 /* leave all channels */
159 joinbuf_init(&part, sptr, cptr, JOINBUF_TYPE_PARTALL,
160 "Left all channels", 0);
162 while ((member = sptr->user->channel))
163 joinbuf_join(&part, member->channel,
164 IsZombie(member) ? CHFL_ZOMBIE : 0);
166 joinbuf_flush(&part);
172 * m_join - generic message handler
174 int m_join(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
176 struct Channel *chptr;
178 struct JoinBuf create;
182 unsigned int flags = 0;
189 if (parc < 2 || *parv[1] == '\0')
190 return need_more_params(sptr, "JOIN");
192 joinbuf_init(&join, sptr, cptr, JOINBUF_TYPE_JOIN, 0, 0);
193 joinbuf_init(&create, sptr, cptr, JOINBUF_TYPE_CREATE, 0, TStime());
195 chanlist = last0(parv[1]); /* find last "JOIN 0" */
197 keys = parv[2]; /* remember where keys are */
199 parv[2] = 0; /* for call to m_names below */
201 for (name = ircd_strtok(&p, chanlist, ","); name;
202 name = ircd_strtok(&p, 0, ",")) {
203 clean_channelname(name);
205 if (join0(&join, cptr, sptr, name)) /* did client do a JOIN 0? */
208 if (!IsChannelName(name)) { /* bad channel name */
209 send_reply(sptr, ERR_NOSUCHCHANNEL, name);
214 /* BADCHANed channel */
215 if ((gline = gline_find(name, GLINE_BADCHAN | GLINE_EXACT)) &&
216 GlineIsActive(gline) && !IsAnOper(sptr)) {
217 send_reply(sptr, ERR_BADCHANNAME, name);
222 if ((chptr = FindChannel(name))) {
223 if (find_member_link(chptr, sptr))
224 continue; /* already on channel */
226 flags = CHFL_DEOPPED;
228 flags = IsModelessChannel(name) ? CHFL_DEOPPED : CHFL_CHANOP;
230 if (sptr->user->joined >= MAXCHANNELSPERUSER
231 #ifdef OPER_NO_CHAN_LIMIT
232 /* Opers are allowed to join any number of channels */
236 send_reply(sptr, ERR_TOOMANYCHANNELS, chptr ? chptr->chname : name);
237 break; /* no point processing the other channels */
241 if (check_target_limit(sptr, chptr, chptr->chname, 0))
242 continue; /* exceeded target limit */
243 else if ((i = can_join(sptr, chptr, keys))) {
244 #ifdef OPER_WALK_THROUGH_LMODES
245 if (i > MAGIC_OPER_OVERRIDE) { /* oper overrode mode */
246 switch (i - MAGIC_OPER_OVERRIDE) {
247 case ERR_CHANNELISFULL: /* figure out which mode */
251 case ERR_INVITEONLYCHAN:
255 case ERR_BANNEDFROMCHAN:
259 case ERR_BADCHANNELKEY:
264 /* send accountability notice */
265 sendto_opmask_butone(0, SNO_HACK4, "OPER JOIN: %C JOIN %H "
266 "(overriding +%c)", sptr, chptr, i);
268 send_reply(sptr, i, chptr->chname);
272 send_reply(sptr, i, chptr->chname);
275 } /* else if ((i = can_join(sptr, chptr, keys))) { */
277 joinbuf_join(&join, chptr, flags);
278 } else if (!(chptr = get_channel(sptr, name, CGT_CREATE)))
279 continue; /* couldn't get channel */
280 else if (check_target_limit(sptr, chptr, chptr->chname, 1)) {
281 /* Note: check_target_limit will only ever return 0 here */
282 sub1_from_channel(chptr); /* created it... */
285 joinbuf_join(&create, chptr, flags);
287 del_invite(sptr, chptr);
289 if (chptr->topic[0]) {
290 send_reply(sptr, RPL_TOPIC, chptr->chname, chptr->topic);
291 send_reply(sptr, RPL_TOPICWHOTIME, chptr->chname, chptr->topic_nick,
296 m_names(cptr, sptr, 2, parv); /* XXX find a better way */
299 joinbuf_flush(&join); /* must be first, if there's a JOIN 0 */
300 joinbuf_flush(&create);
306 * ms_join - server message handler
308 int ms_join(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
310 struct Membership *member;
311 struct Channel *chptr;
313 struct JoinBuf create;
314 unsigned int flags = 0;
319 if (IsServer(sptr)) {
320 Debug((DEBUG_ERROR, "%s tried to JOIN a channel", sptr->name));
324 if (parc < 2 || *parv[1] == '\0')
325 return need_more_params(sptr, "JOIN");
327 joinbuf_init(&join, sptr, cptr, JOINBUF_TYPE_JOIN, 0, 0);
328 joinbuf_init(&create, sptr, cptr, JOINBUF_TYPE_CREATE, 0, TStime());
330 chanlist = last0(parv[1]); /* find last "JOIN 0" */
332 for (name = ircd_strtok(&p, chanlist, ","); name;
333 name = ircd_strtok(&p, 0, ",")) {
334 clean_channelname(name);
336 if (join0(&join, cptr, sptr, name)) /* did client do a JOIN 0? */
339 if (IsLocalChannel(name) || !IsChannelName(name))
342 if ((chptr = FindChannel(name))) {
343 if ((member = find_member_link(chptr, sptr))) {
344 if (!IsZombie(member)) /* already on channel */
347 flags = member->status & (CHFL_DEOPPED | CHFL_SERVOPOK);
348 remove_user_from_channel(sptr, chptr);
349 chptr = FindChannel(name);
351 flags = CHFL_DEOPPED | ((sptr->flags & FLAGS_TS8) ? CHFL_SERVOPOK : 0);
353 flags = IsModelessChannel(name) ? CHFL_DEOPPED : CHFL_CHANOP;
356 joinbuf_join(&join, chptr, flags);
357 /* Strange that a channel should get created by a JOIN, but as long
358 * as there are desynchs, we have to assume it's possible. Previous
359 * solutions involved sending a TS with the JOIN, but that seems
360 * unworkable to me; my solution is to transmute the JOIN into a
361 * CREATE, and let the next BURST try to fix the problem. Another
362 * solution would be to simply issue an upstream KICK, but that
363 * won't currently be accepted. Is this what DESTRUCT is for?
365 else if (!(chptr = get_channel(sptr, name, CGT_CREATE)))
366 continue; /* couldn't get channel */
368 chptr->creationtime = TStime(); /* have to set the creation TS */
369 joinbuf_join(&create, chptr, flags);
373 joinbuf_flush(&join); /* must be first, if there's a JOIN 0 */
374 joinbuf_flush(&create);