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1 | /* | |
2 | * ircd-ratbox: A slightly useful ircd. | |
3 | * channel.h: The ircd channel header. | |
4 | * | |
5 | * Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center | |
6 | * Copyright (C) 1996-2002 Hybrid Development Team | |
7 | * Copyright (C) 2002-2004 ircd-ratbox development team | |
8 | * | |
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 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
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. | |
18 | * | |
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
22 | * USA | |
23 | */ | |
24 | ||
25 | #ifndef INCLUDED_channel_h | |
26 | #define INCLUDED_channel_h | |
27 | ||
28 | #define MODEBUFLEN 200 | |
29 | ||
30 | /* Maximum mode changes allowed per client, per server is different */ | |
31 | #define MAXMODEPARAMS 4 | |
32 | #define MAXMODEPARAMSSERV 10 | |
33 | ||
34 | #include <setup.h> | |
35 | #include "hook.h" | |
36 | ||
37 | struct Client; | |
38 | ||
39 | /* mode structure for channels */ | |
40 | struct Mode | |
41 | { | |
42 | unsigned int mode; | |
43 | int limit; | |
44 | char key[KEYLEN]; | |
45 | unsigned int join_num; | |
46 | unsigned int join_time; | |
47 | char forward[LOC_CHANNELLEN + 1]; | |
48 | }; | |
49 | ||
50 | /* channel structure */ | |
51 | struct Channel | |
52 | { | |
53 | rb_dlink_node node; | |
54 | struct Mode mode; | |
55 | char *mode_lock; | |
56 | char *topic; | |
57 | char *topic_info; | |
58 | time_t topic_time; | |
59 | time_t last_knock; /* don't allow knock to flood */ | |
60 | ||
61 | rb_dlink_list members; /* channel members */ | |
62 | rb_dlink_list locmembers; /* local channel members */ | |
63 | ||
64 | rb_dlink_list invites; | |
65 | rb_dlink_list banlist; | |
66 | rb_dlink_list exceptlist; | |
67 | rb_dlink_list invexlist; | |
68 | rb_dlink_list quietlist; | |
69 | ||
70 | time_t first_received_message_time; /* channel flood control */ | |
71 | int received_number_of_privmsgs; | |
72 | int flood_noticed; | |
73 | ||
74 | unsigned int join_count; /* joins within delta */ | |
75 | unsigned int join_delta; /* last ts of join */ | |
76 | ||
77 | time_t bants; | |
78 | time_t channelts; | |
79 | char *chname; | |
80 | ||
81 | struct Client *last_checked_client; | |
82 | time_t last_checked_ts; | |
83 | unsigned int last_checked_type; | |
84 | int last_checked_result; | |
85 | }; | |
86 | ||
87 | struct membership | |
88 | { | |
89 | rb_dlink_node channode; | |
90 | rb_dlink_node locchannode; | |
91 | rb_dlink_node usernode; | |
92 | ||
93 | struct Channel *chptr; | |
94 | struct Client *client_p; | |
95 | unsigned int flags; | |
96 | ||
97 | time_t bants; | |
98 | }; | |
99 | ||
100 | #define BANLEN 195 | |
101 | struct Ban | |
102 | { | |
103 | char *banstr; | |
104 | char *who; | |
105 | time_t when; | |
106 | char *forward; | |
107 | rb_dlink_node node; | |
108 | }; | |
109 | ||
110 | struct mode_letter | |
111 | { | |
112 | int mode; | |
113 | char letter; | |
114 | }; | |
115 | ||
116 | struct ChModeChange | |
117 | { | |
118 | char letter; | |
119 | const char *arg; | |
120 | const char *id; | |
121 | int dir; | |
122 | int mems; | |
123 | }; | |
124 | ||
125 | typedef void ChannelModeFunc(struct Client *source_p, struct Channel *chptr, | |
126 | int alevel, const char *arg, int *errors, int dir, char c, long mode_type); | |
127 | ||
128 | enum chm_flags | |
129 | { | |
130 | CHM_CAN_QUERY = 1 << 0, | |
131 | CHM_OPS_QUERY = 1 << 1, | |
132 | CHM_ARG_SET = 1 << 2, | |
133 | CHM_ARG_DEL = 1 << 3, | |
134 | CHM_ARGS = CHM_ARG_SET | CHM_ARG_DEL, | |
135 | CHM_QUERYABLE = CHM_ARGS | CHM_CAN_QUERY, | |
136 | }; | |
137 | ||
138 | struct ChannelMode | |
139 | { | |
140 | ChannelModeFunc *set_func; | |
141 | long mode_type; | |
142 | enum chm_flags flags; | |
143 | }; | |
144 | ||
145 | typedef int (*ExtbanFunc)(const char *data, struct Client *client_p, | |
146 | struct Channel *chptr, long mode_type); | |
147 | ||
148 | /* can_send results */ | |
149 | #define CAN_SEND_NO 0 | |
150 | #define CAN_SEND_NONOP 1 | |
151 | #define CAN_SEND_OPV 2 | |
152 | ||
153 | /* channel status flags */ | |
154 | #define CHFL_PEON 0x0000 /* normal member of channel */ | |
155 | #define CHFL_VOICE 0x0001 /* the power to speak */ | |
156 | #define CHFL_CHANOP 0x0002 /* Channel operator */ | |
157 | ||
158 | #define CHFL_BANNED 0x0008 /* cached as banned */ | |
159 | #define CHFL_QUIETED 0x0010 /* cached as being +q victim */ | |
160 | #define ONLY_SERVERS 0x0020 | |
161 | #define ONLY_OPERS 0x0040 | |
162 | #define ALL_MEMBERS CHFL_PEON | |
163 | #define ONLY_CHANOPS CHFL_CHANOP | |
164 | #define ONLY_CHANOPSVOICED (CHFL_CHANOP|CHFL_VOICE) | |
165 | ||
166 | #define is_chanop(x) ((x) && (x)->flags & CHFL_CHANOP) | |
167 | #define is_voiced(x) ((x) && (x)->flags & CHFL_VOICE) | |
168 | #define is_chanop_voiced(x) ((x) && (x)->flags & (CHFL_CHANOP|CHFL_VOICE)) | |
169 | #define can_send_banned(x) ((x) && (x)->flags & (CHFL_BANNED|CHFL_QUIETED)) | |
170 | ||
171 | /* channel modes ONLY */ | |
172 | #define MODE_PRIVATE 0x0001 | |
173 | #define MODE_SECRET 0x0002 | |
174 | #define MODE_MODERATED 0x0004 | |
175 | #define MODE_TOPICLIMIT 0x0008 | |
176 | #define MODE_INVITEONLY 0x0010 | |
177 | #define MODE_NOPRIVMSGS 0x0020 | |
178 | #define MODE_REGONLY 0x0040 | |
179 | #define MODE_EXLIMIT 0x0100 /* exempt from list limits, +b/+e/+I/+q */ | |
180 | #define MODE_PERMANENT 0x0200 /* permanant channel, +P */ | |
181 | #define MODE_OPMODERATE 0x0400 /* send rejected messages to ops */ | |
182 | #define MODE_FREEINVITE 0x0800 /* allow free use of /invite */ | |
183 | #define MODE_FREETARGET 0x1000 /* can be forwarded to without authorization */ | |
184 | #define MODE_DISFORWARD 0x2000 /* disable channel forwarding */ | |
185 | ||
186 | #define CHFL_BAN 0x10000000 /* ban channel flag */ | |
187 | #define CHFL_EXCEPTION 0x20000000 /* exception to ban channel flag */ | |
188 | #define CHFL_INVEX 0x40000000 | |
189 | #define CHFL_QUIET 0x80000000 | |
190 | ||
191 | /* mode flags for direction indication */ | |
192 | #define MODE_QUERY 0 | |
193 | #define MODE_ADD 1 | |
194 | #define MODE_DEL -1 | |
195 | #define MODE_OP_QUERY 2 | |
196 | ||
197 | #define SecretChannel(x) ((x) && ((x)->mode.mode & MODE_SECRET)) | |
198 | #define HiddenChannel(x) ((x) && ((x)->mode.mode & MODE_PRIVATE)) | |
199 | #define PubChannel(x) ((!x) || ((x)->mode.mode &\ | |
200 | (MODE_PRIVATE | MODE_SECRET)) == 0) | |
201 | ||
202 | /* channel visible */ | |
203 | #define ShowChannel(v,c) (PubChannel(c) || IsMember((v),(c))) | |
204 | ||
205 | #define IsMember(who, chan) ((who && who->user && \ | |
206 | find_channel_membership(chan, who)) ? 1 : 0) | |
207 | ||
208 | #define IsChannelName(name) ((name) && (IsChanPrefix(*(name)))) | |
209 | ||
210 | /* extban function results */ | |
211 | #define EXTBAN_INVALID -1 /* invalid mask, false even if negated */ | |
212 | #define EXTBAN_NOMATCH 0 /* valid mask, no match */ | |
213 | #define EXTBAN_MATCH 1 /* matches */ | |
214 | ||
215 | int iter_comm_channels_step(rb_dlink_node *pos1, rb_dlink_node *pos2, | |
216 | struct membership **ms1, struct membership **ms2, | |
217 | struct Channel **chptr); | |
218 | ||
219 | ||
220 | /* Iterate two sorted linked lists of channels, with heads headN, in lockstep. | |
221 | At each iteration, chptr will be a channel in at least one of the lists, | |
222 | and each msN will be non-null iff the channel is in its corresponding list. | |
223 | ||
224 | head1 and head2 must be linked list heads. | |
225 | pos1, pos2, ms1, ms2 must be names of modifiable variables, and should not | |
226 | be modified during iteration. It is safe to break or continue at any point | |
227 | without any special cleanup. | |
228 | ||
229 | rb_dlink_node_t *pos1, *pos2, *head1, *head2; | |
230 | struct membership *ms1, *ms2; | |
231 | struct Channel *chptr; | |
232 | */ | |
233 | #define ITER_COMM_CHANNELS(pos1, pos2, head1, head2, ms1, ms2, chptr) \ | |
234 | for ((pos1) = (head1), (pos2) = (head2); \ | |
235 | iter_comm_channels_step((pos1), (pos2), &(ms1), &(ms2), &(chptr)); \ | |
236 | (ms1) && ((pos1) = (pos1)->next), (ms2) && ((pos2) = (pos2)->next)) | |
237 | ||
238 | ||
239 | extern rb_dlink_list global_channel_list; | |
240 | void init_channels(void); | |
241 | ||
242 | struct Channel *allocate_channel(const char *chname); | |
243 | void free_channel(struct Channel *chptr); | |
244 | struct Ban *allocate_ban(const char *, const char *, const char *); | |
245 | void free_ban(struct Ban *bptr); | |
246 | ||
247 | ||
248 | extern void destroy_channel(struct Channel *); | |
249 | ||
250 | extern int can_send(struct Channel *chptr, struct Client *who, | |
251 | struct membership *); | |
252 | extern bool flood_attack_channel(enum message_type msgtype, struct Client *source_p, | |
253 | struct Channel *chptr, char *chname); | |
254 | struct matchset; | |
255 | extern int is_banned(struct Channel *chptr, struct Client *who, | |
256 | struct membership *msptr, const struct matchset *ms, | |
257 | const char **); | |
258 | extern int is_quieted(struct Channel *chptr, struct Client *who, | |
259 | struct membership *msptr, const struct matchset *ms); | |
260 | extern int can_join(struct Client *source_p, struct Channel *chptr, | |
261 | const char *key, const char **forward); | |
262 | ||
263 | extern struct membership *find_channel_membership(struct Channel *, struct Client *); | |
264 | extern const char *find_channel_status(struct membership *msptr, int combine); | |
265 | extern void add_user_to_channel(struct Channel *, struct Client *, int flags); | |
266 | extern void remove_user_from_channel(struct membership *); | |
267 | extern void remove_user_from_channels(struct Client *); | |
268 | extern void invalidate_bancache_user(struct Client *); | |
269 | ||
270 | extern void free_channel_list(rb_dlink_list *); | |
271 | ||
272 | extern bool check_channel_name(const char *name); | |
273 | ||
274 | extern void channel_member_names(struct Channel *chptr, struct Client *, | |
275 | int show_eon); | |
276 | ||
277 | extern void del_invite(struct Channel *chptr, struct Client *who); | |
278 | ||
279 | const char *channel_modes(struct Channel *chptr, struct Client *who); | |
280 | ||
281 | extern struct Channel *find_bannickchange_channel(struct Client *client_p); | |
282 | ||
283 | extern void check_spambot_warning(struct Client *source_p, const char *name); | |
284 | ||
285 | extern void check_splitmode(void *); | |
286 | ||
287 | void set_channel_topic(struct Channel *chptr, const char *topic, | |
288 | const char *topic_info, time_t topicts); | |
289 | ||
290 | extern void init_chcap_usage_counts(void); | |
291 | extern void set_chcap_usage_counts(struct Client *serv_p); | |
292 | extern void unset_chcap_usage_counts(struct Client *serv_p); | |
293 | extern void send_cap_mode_changes(struct Client *client_p, struct Client *source_p, | |
294 | struct Channel *chptr, struct ChModeChange foo[], int); | |
295 | ||
296 | void resv_chan_forcepart(const char *name, const char *reason, int temp_time); | |
297 | ||
298 | extern void set_channel_mode(struct Client *client_p, struct Client *source_p, | |
299 | struct Channel *chptr, struct membership *msptr, int parc, const char *parv[]); | |
300 | extern void set_channel_mlock(struct Client *client_p, struct Client *source_p, | |
301 | struct Channel *chptr, const char *newmlock, bool propagate); | |
302 | ||
303 | extern struct ChannelMode chmode_table[256]; | |
304 | ||
305 | extern bool add_id(struct Client *source_p, struct Channel *chptr, const char *banid, | |
306 | const char *forward, rb_dlink_list * list, long mode_type); | |
307 | ||
308 | extern struct Ban * del_id(struct Channel *chptr, const char *banid, rb_dlink_list * list, | |
309 | long mode_type); | |
310 | ||
311 | extern ExtbanFunc extban_table[256]; | |
312 | ||
313 | extern int match_extban(const char *banstr, struct Client *client_p, struct Channel *chptr, long mode_type); | |
314 | extern int valid_extban(const char *banstr, struct Client *client_p, struct Channel *chptr, long mode_type); | |
315 | const char * get_extban_string(void); | |
316 | ||
317 | extern int get_channel_access(struct Client *source_p, struct Channel *chptr, struct membership *msptr, int dir, const char *modestr); | |
318 | ||
319 | extern void send_channel_join(struct Channel *chptr, struct Client *client_p); | |
320 | ||
321 | #endif /* INCLUDED_channel_h */ |