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c86edd1d Q |
1 | #/* channel.c */ |
2 | ||
3 | #include "channel.h" | |
4 | #include "../server/server.h" | |
5 | #include "../nick/nick.h" | |
6 | #include "../lib/irc_string.h" | |
7 | #include "../irc/irc_config.h" | |
8 | #include "../parser/parser.h" | |
9 | #include "../irc/irc.h" | |
10 | #include "../lib/base64.h" | |
87698d77 | 11 | #include "../lib/version.h" |
11032584 | 12 | #include "../core/nsmalloc.h" |
c86edd1d Q |
13 | |
14 | #include <stdio.h> | |
4ad1cf7a | 15 | #include <string.h> |
c86edd1d | 16 | |
70b0a4e5 | 17 | MODULE_VERSION(""); |
87698d77 | 18 | |
c86edd1d Q |
19 | #define channelhash(x) (crc32i(x)%CHANNELHASHSIZE) |
20 | ||
21 | unsigned long nouser; | |
c86edd1d Q |
22 | |
23 | const flag cmodeflags[] = { | |
24 | { 'n', CHANMODE_NOEXTMSG }, | |
25 | { 't', CHANMODE_TOPICLIMIT }, | |
26 | { 's', CHANMODE_SECRET }, | |
27 | { 'p', CHANMODE_PRIVATE }, | |
28 | { 'i', CHANMODE_INVITEONLY }, | |
29 | { 'l', CHANMODE_LIMIT }, | |
30 | { 'k', CHANMODE_KEY }, | |
31 | { 'm', CHANMODE_MODERATE }, | |
32 | { 'c', CHANMODE_NOCOLOUR }, | |
33 | { 'C', CHANMODE_NOCTCP }, | |
34 | { 'r', CHANMODE_REGONLY }, | |
35 | { 'D', CHANMODE_DELJOINS }, | |
36 | { 'u', CHANMODE_NOQUITMSG }, | |
37 | { 'N', CHANMODE_NONOTICE }, | |
73a2c60a | 38 | { 'M', CHANMODE_MODNOAUTH }, |
39 | { 'T', CHANMODE_SINGLETARG }, | |
c86edd1d Q |
40 | { '\0', 0 } }; |
41 | ||
42 | void channelstats(int hooknum, void *arg); | |
43 | void sendchanburst(int hooknum, void *arg); | |
44 | ||
45 | void _init() { | |
46 | /* Initialise internal structures */ | |
47 | initchannelalloc(); | |
c86edd1d Q |
48 | |
49 | /* Set up the nouser marker according to our own numeric */ | |
50 | nouser=(mylongnum<<18)|CU_NOUSERMASK; | |
51 | ||
e340eee8 | 52 | /* If we're connected to IRC, force a disconnect. This needs to be done |
53 | * before we register all our hooks which would otherwise get called | |
54 | * during the disconnect. */ | |
55 | if (connected) { | |
56 | irc_send("%s SQ %s 0 :Resync [adding channel support]",mynumeric->content,myserver->content); irc_disconnected(); | |
57 | } | |
58 | ||
c86edd1d Q |
59 | /* Set up our hooks */ |
60 | registerhook(HOOK_NICK_NEWNICK,&addordelnick); | |
61 | registerhook(HOOK_NICK_LOSTNICK,&addordelnick); | |
62 | registerhook(HOOK_CORE_STATSREQUEST,&channelstats); | |
63 | registerhook(HOOK_IRC_SENDBURSTBURSTS,&sendchanburst); | |
f2b36aa8 | 64 | registerhook(HOOK_NICK_WHOISCHANNELS,&handlewhoischannels); |
c86edd1d Q |
65 | |
66 | registerserverhandler("B",&handleburstmsg,7); | |
67 | registerserverhandler("J",&handlejoinmsg,2); | |
68 | registerserverhandler("C",&handlecreatemsg,2); | |
69 | registerserverhandler("L",&handlepartmsg,1); | |
70 | registerserverhandler("K",&handlekickmsg,3); | |
71 | registerserverhandler("T",&handletopicmsg,3); | |
72 | registerserverhandler("M",&handlemodemsg,8); | |
73 | registerserverhandler("OM",&handlemodemsg,8); /* Treat OPMODE just like MODE */ | |
74 | registerserverhandler("CM",&handleclearmodemsg,2); | |
c86edd1d Q |
75 | } |
76 | ||
77 | void _fini() { | |
11032584 | 78 | unsigned int i; |
79 | struct channel *cp; | |
80 | struct chanindex *cip, *ncip; | |
81 | nick *np; | |
82 | ||
c86edd1d Q |
83 | deregisterserverhandler("B",&handleburstmsg); |
84 | deregisterserverhandler("J",&handlejoinmsg); | |
85 | deregisterserverhandler("C",&handlecreatemsg); | |
86 | deregisterserverhandler("L",&handlepartmsg); | |
87 | deregisterserverhandler("K",&handlekickmsg); | |
88 | deregisterserverhandler("T",&handletopicmsg); | |
89 | deregisterserverhandler("M",&handlemodemsg); | |
90 | deregisterserverhandler("OM",&handlemodemsg); | |
91 | deregisterserverhandler("CM",&handleclearmodemsg); | |
92 | ||
93 | deregisterhook(HOOK_NICK_NEWNICK,&addordelnick); | |
94 | deregisterhook(HOOK_NICK_LOSTNICK,&addordelnick); | |
65f2c6a3 | 95 | deregisterhook(HOOK_CORE_STATSREQUEST,&channelstats); |
96 | deregisterhook(HOOK_IRC_SENDBURSTBURSTS,&sendchanburst); | |
f2b36aa8 | 97 | deregisterhook(HOOK_NICK_WHOISCHANNELS,&handlewhoischannels); |
11032584 | 98 | |
99 | /* Free all the channels */ | |
100 | for(i=0;i<CHANNELHASHSIZE;i++) { | |
101 | for (cip=chantable[i];cip;cip=ncip) { | |
102 | ncip=cip->next; | |
e340eee8 | 103 | if (cp=cip->channel) |
104 | delchannel(cp); | |
11032584 | 105 | } |
106 | } | |
107 | ||
108 | /* We also need to remove the channels array from each user */ | |
109 | for (i=0;i<NICKHASHSIZE;i++) { | |
110 | for (np=nicktable[i];np;np=np->next) { | |
111 | array_free(np->channels); | |
112 | free(np->channels); | |
113 | } | |
114 | } | |
115 | ||
116 | nsfreeall(POOL_CHANNEL); | |
c86edd1d Q |
117 | } |
118 | ||
119 | int addnicktochannel(channel *cp, long numeric) { | |
120 | nick *np; | |
121 | int i; | |
122 | channel **ch; | |
123 | void *args[2]; | |
124 | ||
125 | /* Add the channel to the user first, since it might fail */ | |
126 | if ((np=getnickbynumeric(numeric&CU_NUMERICMASK))==NULL) { | |
127 | Error("channel",ERR_ERROR,"Non-existent numeric %ld joined channel %s",numeric,cp->index->name->content); | |
128 | return 1; | |
129 | } | |
130 | ||
131 | if (getnumerichandlefromchanhash(cp->users,numeric)) { | |
132 | Error("channel",ERR_ERROR,"User %s joined channel %s it was already on!",np->nick,cp->index->name->content); | |
133 | return 1; | |
134 | } | |
135 | ||
136 | i=array_getfreeslot(np->channels); | |
137 | ch=(channel **)(np->channels->content); | |
138 | ch[i]=cp; | |
139 | ||
140 | /* Add the user to the channel. | |
141 | * I don't expect this while loop to go round many times | |
142 | * in the majority of cases */ | |
143 | while (addnumerictochanuserhash(cp->users,numeric)) { | |
144 | rehashchannel(cp); | |
145 | } | |
146 | ||
147 | /* Trigger the hook */ | |
148 | args[0]=(void *)cp; | |
149 | args[1]=(void *)np; | |
150 | triggerhook(HOOK_CHANNEL_NEWNICK,args); | |
151 | ||
152 | return 0; | |
153 | } | |
154 | ||
155 | void delnickfromchannel(channel *cp, long numeric, int updateuser) { | |
156 | int i; | |
157 | channel **ch; | |
158 | nick *np; | |
159 | unsigned long *lp; | |
160 | int found=0; | |
161 | void *args[2]; | |
162 | ||
163 | if ((np=getnickbynumeric(numeric&CU_NUMERICMASK))==NULL) { | |
164 | Error("channel",ERR_ERROR,"Trying to remove non-existent nick %d from channel %s",numeric,cp->index->name); | |
165 | return; | |
166 | } | |
167 | ||
168 | args[0]=(void *)cp; | |
169 | args[1]=(void *)np; | |
170 | ||
171 | if ((lp=getnumerichandlefromchanhash(cp->users,numeric))==NULL) { | |
172 | /* User wasn't on the channel. It's perfectly legit that this can happen. */ | |
173 | return; | |
174 | } else { | |
175 | triggerhook(HOOK_CHANNEL_LOSTNICK,args); | |
176 | *lp=nouser; | |
177 | if (--cp->users->totalusers==0) { | |
178 | /* We're deleting the channel; flag it here */ | |
179 | triggerhook(HOOK_CHANNEL_LOSTCHANNEL,cp); | |
180 | delchannel(cp); | |
181 | } | |
182 | } | |
183 | ||
184 | /* The updateuser part is optional; if the user is parting _all_ their channels | |
185 | * at once we don't bother hunting each channel down we just blat the array */ | |
186 | ||
187 | if (updateuser) { | |
188 | ch=(channel **)(np->channels->content); | |
189 | for (i=0;i<np->channels->cursi;i++) { | |
190 | if (ch[i]==cp) { | |
191 | array_delslot(np->channels,i); | |
192 | found=1; | |
193 | break; | |
194 | } | |
195 | } | |
196 | if (found==0) { | |
197 | Error("channel",ERR_ERROR,"Trying to remove nick %s from channel %s it was not on (chan not on nick)",np->nick,cp->index->name->content); | |
198 | } | |
199 | } | |
200 | } | |
201 | ||
202 | void delchannel(channel *cp) { | |
203 | chanindex *cip; | |
204 | ||
205 | /* Remove entry from index */ | |
206 | cip=cp->index; | |
207 | cip->channel=NULL; | |
208 | releasechanindex(cip); | |
209 | ||
210 | freesstring(cp->topic); | |
211 | freesstring(cp->key); | |
212 | freechanuserhash(cp->users); | |
213 | clearallbans(cp); | |
214 | freechan(cp); | |
215 | } | |
216 | ||
217 | channel *createchannel(char *name) { | |
218 | channel *cp; | |
219 | chanindex *cip; | |
220 | sstring *ssp; | |
221 | ||
222 | cip=findorcreatechanindex(name); | |
223 | ||
224 | if (cip->channel) { | |
225 | Error("channel",ERR_ERROR,"Attempting to create existing channel %s (%s).",cip->name->content,name); | |
226 | return cip->channel; | |
227 | } | |
228 | ||
229 | /* Check that chanindex record has the same capitalisation as actual channel */ | |
230 | if (strcmp(cip->name->content,name)) { | |
231 | ssp=cip->name; | |
232 | cip->name=getsstring(name,CHANNELLEN); | |
233 | freesstring(ssp); | |
234 | } | |
235 | ||
236 | cp=newchan(); | |
237 | cip->channel=cp; | |
238 | cp->index=cip; | |
239 | ||
240 | cp->timestamp=MAGIC_REMOTE_JOIN_TS; | |
241 | cp->topic=NULL; | |
242 | cp->topictime=0; | |
243 | cp->flags=0; | |
244 | cp->key=NULL; | |
245 | cp->limit=0; | |
246 | cp->bans=NULL; | |
247 | cp->users=newchanuserhash(1); | |
248 | ||
249 | return cp; | |
250 | } | |
251 | ||
252 | channel *findchannel(char *name) { | |
253 | chanindex *cip; | |
254 | ||
255 | cip=findchanindex(name); | |
256 | if (cip==NULL) { | |
257 | return NULL; | |
258 | } else { | |
259 | return cip->channel; | |
260 | } | |
261 | } | |
262 | ||
263 | void channelstats(int hooknum, void *arg) { | |
c3db6f7e | 264 | long level=(long)arg; |
c86edd1d Q |
265 | int i,curchain,maxchain=0,total=0,buckets=0,realchans=0; |
266 | int users=0,slots=0; | |
267 | chanindex *cip; | |
268 | char buf[100]; | |
269 | ||
270 | for (i=0;i<CHANNELHASHSIZE;i++) { | |
271 | if (chantable[i]!=NULL) { | |
272 | buckets++; | |
273 | curchain=0; | |
274 | for (cip=chantable[i];cip;cip=cip->next) { | |
275 | total++; | |
276 | curchain++; | |
277 | if (cip->channel!=NULL) { | |
278 | realchans++; | |
279 | users+=cip->channel->users->totalusers; | |
280 | slots+=cip->channel->users->hashsize; | |
281 | } | |
282 | } | |
283 | if (curchain>maxchain) { | |
284 | maxchain=curchain; | |
285 | } | |
286 | } | |
287 | } | |
288 | ||
289 | if (level>5) { | |
290 | /* Full stats */ | |
291 | sprintf(buf,"Channel : %6d channels (HASH: %6d/%6d, chain %3d)",total,buckets,CHANNELHASHSIZE,maxchain); | |
292 | triggerhook(HOOK_CORE_STATSREPLY,buf); | |
293 | ||
294 | sprintf(buf,"Channel :%7d channel users, %7d slots allocated, efficiency %.1f%%",users,slots,(float)(100*users)/slots); | |
295 | triggerhook(HOOK_CORE_STATSREPLY,buf); | |
296 | } | |
297 | ||
298 | if (level>2) { | |
299 | sprintf(buf,"Channel : %6d channels formed.",realchans); | |
300 | triggerhook(HOOK_CORE_STATSREPLY,buf); | |
301 | } | |
302 | } | |
303 | ||
304 | ||
305 | /* | |
306 | * Deal with users joining the network (create and initialise their channel array) | |
307 | * or leaving the network (remove them from all channels and delete the array) | |
308 | */ | |
309 | ||
310 | void addordelnick(int hooknum, void *arg) { | |
311 | nick *np=(nick *)arg; | |
312 | channel **ch; | |
313 | int i; | |
314 | ||
315 | switch(hooknum) { | |
316 | case HOOK_NICK_NEWNICK: | |
317 | np->channels=(array *)malloc(sizeof(array)); | |
318 | array_init(np->channels,sizeof(channel **)); | |
319 | array_setlim1(np->channels,10); | |
320 | array_setlim2(np->channels,15); | |
321 | break; | |
322 | ||
323 | case HOOK_NICK_LOSTNICK: | |
324 | ch=(channel **)(np->channels->content); | |
325 | for(i=0;i<np->channels->cursi;i++) { | |
326 | delnickfromchannel(ch[i],np->numeric,0); | |
327 | } | |
328 | array_free(np->channels); | |
329 | free(np->channels); | |
330 | break; | |
331 | } | |
332 | } | |
333 | ||
334 | /* | |
335 | * Spam our local burst on connect.. | |
336 | */ | |
337 | ||
338 | void sendchanburst(int hooknum, void *arg) { | |
339 | chanindex *cip; | |
340 | channel *cp; | |
341 | chanban *ban; | |
342 | char buf[BUFSIZE]; | |
343 | char buf2[20]; | |
344 | char *banstr; | |
345 | int i; | |
346 | int j,k; | |
347 | int bufpos; | |
348 | int newmode=1; | |
349 | int newline=1; | |
350 | long modeorder[] = { 0, CUMODE_OP, CUMODE_VOICE, CUMODE_OP|CUMODE_VOICE }; | |
351 | long curmode; | |
352 | ||
353 | for (i=0;i<CHANNELHASHSIZE;i++) { | |
354 | for (cip=chantable[i];cip;cip=cip->next) { | |
355 | cp=cip->channel; | |
356 | if (cp==NULL) { | |
357 | continue; | |
358 | } | |
359 | /* Set up the burst */ | |
360 | sprintf(buf2,"%d ",cp->limit); | |
361 | bufpos=sprintf(buf,"%s B %s %lu %s %s%s%s",mynumeric->content,cip->name->content,cp->timestamp, | |
362 | printflags(cp->flags,cmodeflags),IsLimit(cp)?buf2:"", | |
363 | IsKey(cp)?cp->key->content:"",IsKey(cp)?" ":""); | |
364 | for(j=0;j<4;j++) { | |
365 | curmode=modeorder[j]; | |
366 | newmode=1; | |
367 | for (k=0;k<cp->users->hashsize;k++) { | |
368 | if (cp->users->content[k]!=nouser && ((cp->users->content[k]&(CU_MODEMASK))==curmode)) { | |
369 | /* We found a user of the correct type for this pass */ | |
370 | if (BUFSIZE-bufpos<10) { /* Out of space.. wrap up the old line and send a new one */ | |
371 | newmode=newline=1; | |
372 | irc_send("%s",buf); | |
373 | bufpos=sprintf(buf,"%s B %s %lu ",mynumeric->content,cip->name->content,cp->timestamp); | |
374 | } | |
375 | if (newmode) { | |
376 | bufpos+=sprintf(buf+bufpos,"%s%s%s%s%s",newline?"":",",longtonumeric(cp->users->content[k]&CU_NUMERICMASK,5), | |
377 | (curmode==0?"":":"),(curmode&CUMODE_OP)?"o":"",(curmode&CUMODE_VOICE)?"v":""); | |
378 | } else { | |
379 | bufpos+=sprintf(buf+bufpos,",%s",longtonumeric(cp->users->content[k]&CU_NUMERICMASK,5)); | |
380 | } | |
381 | newmode=newline=0; | |
382 | } /* if(...) */ | |
383 | } /* for (k=..) */ | |
384 | } /* for (j=..) */ | |
385 | ||
386 | /* And now the bans */ | |
387 | newline=1; | |
388 | for(ban=cp->bans;ban;ban=ban->next) { | |
389 | banstr=bantostring(ban); | |
390 | if ((BUFSIZE-bufpos)<(strlen(banstr)+10)) { /* Out of space.. wrap up the old line and send a new one */ | |
391 | newline=1; | |
392 | irc_send("%s",buf); | |
393 | bufpos=sprintf(buf,"%s B %s %lu",mynumeric->content,cip->name->content,cp->timestamp); | |
394 | } | |
395 | bufpos+=sprintf(buf+bufpos,"%s%s ",(newline?" :%":""),banstr); | |
396 | newline=0; | |
397 | } | |
398 | irc_send("%s",buf); | |
399 | } /* for(cp..) */ | |
400 | } /* for (i..) */ | |
401 | } | |
402 | ||
403 | /* | |
404 | * countuniquehosts: | |
405 | * Uses the marker on all host records to count unique hosts | |
406 | * on a channel in O(n) time (n is channel user hash size). | |
407 | */ | |
408 | ||
409 | unsigned int countuniquehosts(channel *cp) { | |
410 | unsigned int marker; | |
411 | int i; | |
412 | int count=0; | |
413 | nick *np; | |
414 | ||
415 | marker=nexthostmarker(); | |
416 | for (i=0;i<cp->users->hashsize;i++) { | |
417 | if (cp->users->content[i]==nouser) | |
418 | continue; | |
419 | ||
420 | if ((np=getnickbynumeric(cp->users->content[i]))==NULL) { | |
421 | Error("channel",ERR_ERROR,"Found unknown numeric %u on channel %s",cp->users->content[i],cp->index->name->content); | |
422 | continue; | |
423 | } | |
424 | ||
425 | if (np->host->marker==marker) | |
426 | continue; | |
427 | ||
428 | np->host->marker=marker; | |
429 | count++; | |
430 | } | |
431 | ||
432 | return count; | |
433 | } | |
11032584 | 434 |