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