2 * charybdis: An advanced ircd.
3 * m_list_safelist.c: Version of /list that uses the safelist code.
5 * Copyright (c) 2006 William Pitcock <nenolod@nenolod.net>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are
11 * 1. Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * 3. The name of the author may not be used to endorse or promote products
19 * derived from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
23 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
25 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
26 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
27 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
29 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
30 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
33 * $Id: m_list.c 3372 2007-04-03 10:18:07Z nenolod $
44 #include "s_newconf.h"
46 #include "supported.h"
51 #include "inline/stringops.h"
55 static rb_dlink_list safelisting_clients
= { NULL
, NULL
, 0 };
57 static int _modinit(void);
58 static void _moddeinit(void);
60 static int m_list(struct Client
*, struct Client
*, int, const char **);
61 static int mo_list(struct Client
*, struct Client
*, int, const char **);
63 static void list_one_channel(struct Client
*source_p
, struct Channel
*chptr
, int visible
);
65 static void safelist_check_cliexit(hook_data_client_exit
* hdata
);
66 static void safelist_client_instantiate(struct Client
*, struct ListClient
*);
67 static void safelist_client_release(struct Client
*);
68 static void safelist_one_channel(struct Client
*source_p
, struct Channel
*chptr
);
69 static void safelist_iterate_client(struct Client
*source_p
);
70 static void safelist_iterate_clients(void *unused
);
71 static void safelist_channel_named(struct Client
*source_p
, const char *name
, int operspy
);
73 struct Message list_msgtab
= {
74 "LIST", 0, 0, 0, MFLG_SLOW
,
75 {mg_unreg
, {m_list
, 0}, mg_ignore
, mg_ignore
, mg_ignore
, {mo_list
, 0}}
78 mapi_clist_av1 list_clist
[] = { &list_msgtab
, NULL
};
80 mapi_hfn_list_av1 list_hfnlist
[] = {
81 {"client_exit", (hookfn
) safelist_check_cliexit
},
85 DECLARE_MODULE_AV1(list
, _modinit
, _moddeinit
, list_clist
, NULL
, list_hfnlist
, "$Revision: 3372 $");
87 static struct ev_entry
*iterate_clients_ev
= NULL
;
89 static int _modinit(void)
91 iterate_clients_ev
= rb_event_add("safelist_iterate_clients", safelist_iterate_clients
, NULL
, 3);
97 * U = user count search (< >)
98 * C = creation time search (C> C<)
99 * T = topic search (T> T<)
101 add_isupport("SAFELIST", isupport_string
, "");
102 add_isupport("ELIST", isupport_string
, "CTU");
107 static void _moddeinit(void)
109 rb_event_delete(iterate_clients_ev
);
111 delete_isupport("SAFELIST");
112 delete_isupport("ELIST");
115 static void safelist_check_cliexit(hook_data_client_exit
* hdata
)
117 /* Cancel the safelist request if we are disconnecting
118 * from the server. That way it doesn't core. :P --nenolod
120 if (MyClient(hdata
->target
) && hdata
->target
->localClient
->safelist_data
!= NULL
)
122 safelist_client_release(hdata
->target
);
129 * XXX - With SAFELIST, do we really need to continue pacing?
130 * In theory, the server cannot be lagged by this. --nenolod
132 static int m_list(struct Client
*client_p
, struct Client
*source_p
, int parc
, const char *parv
[])
134 static time_t last_used
= 0L;
136 if (source_p
->localClient
->safelist_data
!= NULL
)
138 sendto_one_notice(source_p
, ":/LIST aborted");
139 safelist_client_release(source_p
);
143 if (parc
< 2 || !IsChannelName(parv
[1]))
145 /* pace this due to the sheer traffic involved */
146 if (((last_used
+ ConfigFileEntry
.pace_wait
) > rb_current_time()))
148 sendto_one(source_p
, form_str(RPL_LOAD2HI
), me
.name
, source_p
->name
, "LIST");
149 sendto_one(source_p
, form_str(RPL_LISTEND
), me
.name
, source_p
->name
);
153 last_used
= rb_current_time();
156 return mo_list(client_p
, source_p
, parc
, parv
);
162 static int mo_list(struct Client
*client_p
, struct Client
*source_p
, int parc
, const char *parv
[])
164 struct ListClient
*params
;
170 if (source_p
->localClient
->safelist_data
!= NULL
)
172 sendto_one_notice(source_p
, ":/LIST aborted");
173 safelist_client_release(source_p
);
179 args
= LOCAL_COPY(parv
[1]);
182 if (args
&& *args
== '!' && IsOperSpy(source_p
))
185 report_operspy(source_p
, "LIST", args
);
189 /* Single channel. */
190 if (args
&& IsChannelName(args
))
192 safelist_channel_named(source_p
, args
, operspy
);
196 /* Multiple channels, possibly with parameters. */
197 params
= rb_malloc(sizeof(struct ListClient
));
199 params
->users_min
= ConfigChannel
.displayed_usercount
;
200 params
->users_max
= INT_MAX
;
201 params
->operspy
= operspy
;
202 params
->created_min
= params
->topic_min
=
203 params
->created_max
= params
->topic_max
= 0;
205 if (args
&& !EmptyString(args
))
207 /* Cancel out default minimum. */
208 params
->users_min
= 0;
210 for (i
= 0; i
< 7; i
++)
212 if ((p
= strchr(args
, ',')) != NULL
)
220 params
->users_max
= atoi(args
);
221 if (params
->users_max
== 0)
222 params
->users_max
= INT_MAX
;
227 else if (*args
== '>')
231 params
->users_min
= atoi(args
) + 1;
233 params
->users_min
= 0;
235 else if (*args
== 'C' || *args
== 'c')
240 /* Creation time earlier than last x minutes. */
244 params
->created_max
= rb_current_time() - (60 * atoi(args
));
247 else if (*args
== '<')
249 /* Creation time within last x minutes. */
253 params
->created_min
= rb_current_time() - (60 * atoi(args
));
257 else if (*args
== 'T' || *args
== 't')
262 /* Topic change time earlier than last x minutes. */
266 params
->topic_max
= rb_current_time() - (60 * atoi(args
));
269 else if (*args
== '<')
271 /* Topic change time within last x minutes. */
275 params
->topic_min
= rb_current_time() - (60 * atoi(args
));
287 safelist_client_instantiate(source_p
, params
);
295 * inputs - client pointer, channel pointer, whether normally visible
297 * side effects - a channel is listed
299 static void list_one_channel(struct Client
*source_p
, struct Channel
*chptr
,
302 char topic
[TOPICLEN
+ 1];
304 if (chptr
->topic
!= NULL
)
305 rb_strlcpy(topic
, chptr
->topic
, sizeof topic
);
309 sendto_one(source_p
, form_str(RPL_LIST
), me
.name
, source_p
->name
,
311 chptr
->chname
, rb_dlink_list_length(&chptr
->members
),
316 * safelist_sendq_exceeded()
318 * inputs - pointer to client that needs checking
319 * outputs - 1 if a client has exceeded the reserved
320 * sendq limit, 0 if not
321 * side effects - none
323 * When safelisting, we only use half of the SendQ at any
326 static int safelist_sendq_exceeded(struct Client
*client_p
)
328 if (rb_linebuf_len(&client_p
->localClient
->buf_sendq
) > (get_sendq(client_p
) / 2))
335 * safelist_client_instantiate()
337 * inputs - pointer to Client to be listed,
338 * pointer to ListClient for params
340 * side effects - the safelist process begins for a
343 * Please do not ever call this on a non-local client.
344 * If you do, you will get SIGSEGV.
346 static void safelist_client_instantiate(struct Client
*client_p
, struct ListClient
*params
)
348 s_assert(MyClient(client_p
));
349 s_assert(params
!= NULL
);
351 client_p
->localClient
->safelist_data
= params
;
353 sendto_one(client_p
, form_str(RPL_LISTSTART
), me
.name
, client_p
->name
);
355 /* pop the client onto the queue for processing */
356 rb_dlinkAddAlloc(client_p
, &safelisting_clients
);
358 /* give the user some initial data to work with */
359 safelist_iterate_client(client_p
);
363 * safelist_client_release()
365 * inputs - pointer to Client being listed on
367 * side effects - the client is no longer being
370 * Please do not ever call this on a non-local client.
371 * If you do, you will get SIGSEGV.
373 static void safelist_client_release(struct Client
*client_p
)
375 s_assert(MyClient(client_p
));
377 rb_dlinkFindDestroy(client_p
, &safelisting_clients
);
379 rb_free(client_p
->localClient
->safelist_data
);
381 client_p
->localClient
->safelist_data
= NULL
;
383 sendto_one(client_p
, form_str(RPL_LISTEND
), me
.name
, client_p
->name
);
387 * safelist_channel_named()
389 * inputs - client pointer, channel name, operspy
391 * side effects - a named channel is listed
393 static void safelist_channel_named(struct Client
*source_p
, const char *name
, int operspy
)
395 struct Channel
*chptr
;
399 sendto_one(source_p
, form_str(RPL_LISTSTART
), me
.name
, source_p
->name
);
401 if ((p
= strchr(name
, ',')))
406 sendto_one_numeric(source_p
, ERR_NOSUCHNICK
, form_str(ERR_NOSUCHNICK
), name
);
407 sendto_one(source_p
, form_str(RPL_LISTEND
), me
.name
, source_p
->name
);
411 chptr
= find_channel(name
);
415 sendto_one_numeric(source_p
, ERR_NOSUCHNICK
, form_str(ERR_NOSUCHNICK
), name
);
416 sendto_one(source_p
, form_str(RPL_LISTEND
), me
.name
, source_p
->name
);
420 visible
= !SecretChannel(chptr
) || IsMember(source_p
, chptr
);
421 if (visible
|| operspy
)
422 list_one_channel(source_p
, chptr
, visible
);
424 sendto_one(source_p
, form_str(RPL_LISTEND
), me
.name
, source_p
->name
);
429 * safelist_one_channel()
431 * inputs - client pointer and channel pointer
433 * side effects - a channel is listed if it meets the
436 static void safelist_one_channel(struct Client
*source_p
, struct Channel
*chptr
)
438 struct ListClient
*safelist_data
= source_p
->localClient
->safelist_data
;
441 visible
= !SecretChannel(chptr
) || IsMember(source_p
, chptr
);
442 if (!visible
&& !safelist_data
->operspy
)
445 if ((unsigned int)chptr
->members
.length
< safelist_data
->users_min
446 || (unsigned int)chptr
->members
.length
> safelist_data
->users_max
)
449 if (safelist_data
->topic_min
&& chptr
->topic_time
< safelist_data
->topic_min
)
452 /* If a topic TS is provided, don't show channels without a topic set. */
453 if (safelist_data
->topic_max
&& (chptr
->topic_time
> safelist_data
->topic_max
454 || chptr
->topic_time
== 0))
457 if (safelist_data
->created_min
&& chptr
->channelts
< safelist_data
->created_min
)
460 if (safelist_data
->created_max
&& chptr
->channelts
> safelist_data
->created_max
)
463 list_one_channel(source_p
, chptr
, visible
);
467 * safelist_iterate_client()
469 * inputs - client pointer
471 * side effects - the client's sendq is filled up again
473 static void safelist_iterate_client(struct Client
*source_p
)
478 for (iter
= source_p
->localClient
->safelist_data
->hash_indice
; iter
< CH_MAX
; iter
++)
480 if (safelist_sendq_exceeded(source_p
->from
) == YES
)
482 source_p
->localClient
->safelist_data
->hash_indice
= iter
;
486 RB_DLINK_FOREACH(ptr
, channelTable
[iter
].head
)
487 safelist_one_channel(source_p
, (struct Channel
*) ptr
->data
);
490 safelist_client_release(source_p
);
493 static void safelist_iterate_clients(void *unused
)
495 rb_dlink_node
*n
, *n2
;
497 RB_DLINK_FOREACH_SAFE(n
, n2
, safelisting_clients
.head
)
498 safelist_iterate_client((struct Client
*)n
->data
);