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