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1 | /* nick.c */ | |
2 | ||
3 | #include "nick.h" | |
4 | #include "../lib/flags.h" | |
5 | #include "../lib/irc_string.h" | |
6 | #include "../lib/base64.h" | |
7 | #include "../irc/irc.h" | |
8 | #include "../irc/irc_config.h" | |
9 | #include "../core/error.h" | |
10 | #include "../core/hooks.h" | |
11 | #include "../lib/sstring.h" | |
12 | #include "../server/server.h" | |
13 | #include "../parser/parser.h" | |
14 | #include "../lib/version.h" | |
15 | #include "../lib/ccassert.h" | |
16 | #include "../core/nsmalloc.h" | |
17 | ||
18 | #include <stdlib.h> | |
19 | #include <string.h> | |
20 | #include <stdio.h> | |
21 | ||
22 | MODULE_VERSION(""); | |
23 | ||
24 | CCASSERT(sizeof(host) == sizeof(realname)); | |
25 | ||
26 | const flag umodeflags[] = { | |
27 | { 'i', UMODE_INV }, | |
28 | { 'w', UMODE_WALLOPS }, | |
29 | { 'g', UMODE_DEBUG }, | |
30 | { 'o', UMODE_OPER }, | |
31 | { 'k', UMODE_SERVICE }, | |
32 | { 'X', UMODE_XOPER }, | |
33 | { 'd', UMODE_DEAF }, | |
34 | { 'r', UMODE_ACCOUNT }, | |
35 | { 'n', UMODE_HIDECHAN }, | |
36 | { 'x', UMODE_HIDEHOST }, | |
37 | { 'h', UMODE_SETHOST }, | |
38 | { 'R', UMODE_REGPRIV }, | |
39 | { 'I', UMODE_HIDEIDLE }, | |
40 | { 'P', UMODE_PARANOID }, | |
41 | { 'q', UMODE_COMCHANS }, | |
42 | { 'Q', UMODE_COMCHANSRESTR }, | |
43 | { 'C', UMODE_CLOAKED }, | |
44 | { '\0', 0 } }; | |
45 | ||
46 | const flag accountflags[] = { | |
47 | { 'q', AFLAG_STAFF }, | |
48 | { 'h', AFLAG_SUPPORT }, | |
49 | { 'o', AFLAG_OPER }, | |
50 | { 'a', AFLAG_ADMIN }, | |
51 | { 'd', AFLAG_DEVELOPER }, | |
52 | { '\0', 0 } }; | |
53 | ||
54 | #define nickhash(x) ((crc32i(x))%NICKHASHSIZE) | |
55 | ||
56 | nick *nicktable[NICKHASHSIZE]; | |
57 | nick **servernicks[MAXSERVERS]; | |
58 | ||
59 | sstring *nickextnames[MAXNICKEXTS]; | |
60 | ||
61 | void nickstats(int hooknum, void *arg); | |
62 | ||
63 | char *NULLAUTHNAME = ""; | |
64 | ||
65 | void _init() { | |
66 | unsigned int i; | |
67 | authname *anp; | |
68 | ||
69 | /* Clear up the nicks in authext */ | |
70 | for (i=0;i<AUTHNAMEHASHSIZE;i++) | |
71 | for (anp=authnametable[i];anp;anp=anp->next) | |
72 | anp->nicks=NULL; | |
73 | ||
74 | initnickhelpers(); | |
75 | memset(nicktable,0,sizeof(nicktable)); | |
76 | memset(servernicks,0,sizeof(servernicks)); | |
77 | ||
78 | /* If we're connected to IRC, force a disconnect. This needs to be done | |
79 | * before we register all our hooks which would otherwise get called | |
80 | * during the disconnect. */ | |
81 | if (connected) { | |
82 | irc_send("%s SQ %s 0 :Resync [adding nick support]",mynumeric->content,myserver->content); irc_disconnected(); | |
83 | } | |
84 | ||
85 | /* Register our hooks */ | |
86 | registerhook(HOOK_SERVER_NEWSERVER,&handleserverchange); | |
87 | registerhook(HOOK_SERVER_LOSTSERVER,&handleserverchange); | |
88 | registerhook(HOOK_CORE_STATSREQUEST,&nickstats); | |
89 | ||
90 | /* And our server handlers */ | |
91 | registerserverhandler("N",&handlenickmsg,10); | |
92 | registerserverhandler("D",&handlekillmsg,2); | |
93 | registerserverhandler("Q",&handlequitmsg,1); | |
94 | registerserverhandler("M",&handleusermodemsg,3); | |
95 | registerserverhandler("AC",&handleaccountmsg,4); | |
96 | registerserverhandler("P",&handleprivmsg,2); | |
97 | registerserverhandler("A",&handleawaymsg,1); | |
98 | registerserverhandler("CA",&handleaddcloak,1); | |
99 | registerserverhandler("CU",&handleclearcloak,0); | |
100 | ||
101 | /* Fake the addition of our own server */ | |
102 | handleserverchange(HOOK_SERVER_NEWSERVER,(void *)numerictolong(mynumeric->content,2)); | |
103 | } | |
104 | ||
105 | void _fini() { | |
106 | nick *np; | |
107 | int i; | |
108 | ||
109 | fininickhelpers(); | |
110 | ||
111 | for (i=0;i<NICKHASHSIZE;i++) { | |
112 | for (np=nicktable[i];np;np=np->next) { | |
113 | freesstring(np->shident); | |
114 | freesstring(np->sethost); | |
115 | freesstring(np->opername); | |
116 | if(!np->auth && np->authname && (np->authname != NULLAUTHNAME)) | |
117 | free(np->authname); | |
118 | } | |
119 | } | |
120 | ||
121 | nsfreeall(POOL_NICK); | |
122 | ||
123 | /* Free the hooks */ | |
124 | deregisterhook(HOOK_SERVER_NEWSERVER,&handleserverchange); | |
125 | deregisterhook(HOOK_SERVER_LOSTSERVER,&handleserverchange); | |
126 | deregisterhook(HOOK_CORE_STATSREQUEST,&nickstats); | |
127 | ||
128 | /* And our server handlers */ | |
129 | deregisterserverhandler("N",&handlenickmsg); | |
130 | deregisterserverhandler("D",&handlekillmsg); | |
131 | deregisterserverhandler("Q",&handlequitmsg); | |
132 | deregisterserverhandler("M",&handleusermodemsg); | |
133 | deregisterserverhandler("AC",&handleaccountmsg); | |
134 | deregisterserverhandler("P",&handleprivmsg); | |
135 | deregisterserverhandler("A",&handleawaymsg); | |
136 | deregisterserverhandler("CA",&handleaddcloak); | |
137 | deregisterserverhandler("CU",&handleclearcloak); | |
138 | } | |
139 | ||
140 | /* | |
141 | * This function handles servers appearing and disappearing. | |
142 | * For a new server, the client table is allocated. | |
143 | * For a disappearing server, all it's clients are killed and the client table is freed. | |
144 | */ | |
145 | ||
146 | void handleserverchange(int hooknum, void *arg) { | |
147 | long servernum; | |
148 | int i; | |
149 | ||
150 | servernum=(long)arg; | |
151 | ||
152 | switch(hooknum) { | |
153 | case HOOK_SERVER_NEWSERVER: | |
154 | servernicks[servernum]=(nick **)nsmalloc(POOL_NICK,(serverlist[servernum].maxusernum+1)*sizeof(nick **)); | |
155 | memset(servernicks[servernum],0,(serverlist[servernum].maxusernum+1)*sizeof(nick **)); | |
156 | break; | |
157 | ||
158 | case HOOK_SERVER_LOSTSERVER: | |
159 | for (i=0;i<=serverlist[servernum].maxusernum;i++) { | |
160 | if (servernicks[servernum][i]!=NULL) { | |
161 | deletenick(servernicks[servernum][i]); | |
162 | } | |
163 | } | |
164 | nsfree(POOL_NICK,servernicks[servernum]); | |
165 | break; | |
166 | } | |
167 | } | |
168 | ||
169 | /* | |
170 | * deletenick: | |
171 | * | |
172 | * This function handles the removal of a nick from the network | |
173 | */ | |
174 | ||
175 | void deletenick(nick *np) { | |
176 | nick **nh; | |
177 | ||
178 | /* Fire the hook. This will deal with removal from channels etc. */ | |
179 | triggerhook(HOOK_NICK_LOSTNICK, np); | |
180 | ||
181 | /* Release the realname and hostname parts */ | |
182 | ||
183 | for (nh=&(np->realname->nicks);*nh;nh=&((*nh)->nextbyrealname)) { | |
184 | if (*nh==np) { | |
185 | *nh=np->nextbyrealname; | |
186 | break; | |
187 | } | |
188 | } | |
189 | ||
190 | for (nh=&(np->host->nicks);*nh;nh=&((*nh)->nextbyhost)) { | |
191 | if (*nh==np) { | |
192 | *nh=np->nextbyhost; | |
193 | break; | |
194 | } | |
195 | } | |
196 | ||
197 | releaserealname(np->realname); | |
198 | releasehost(np->host); | |
199 | ||
200 | if(IsAccount(np)) { | |
201 | if(!np->auth) { | |
202 | if(np->authname && (np->authname != NULLAUTHNAME)) | |
203 | free(np->authname); | |
204 | } else { | |
205 | np->auth->usercount--; | |
206 | ||
207 | for (nh=&(np->auth->nicks);*nh;nh=&((*nh)->nextbyauthname)) { | |
208 | if (*nh==np) { | |
209 | *nh=np->nextbyauthname; | |
210 | break; | |
211 | } | |
212 | } | |
213 | ||
214 | releaseauthname(np->auth); | |
215 | } | |
216 | } | |
217 | ||
218 | freesstring(np->shident); /* freesstring(NULL) is OK */ | |
219 | freesstring(np->sethost); | |
220 | freesstring(np->opername); | |
221 | freesstring(np->message); | |
222 | ||
223 | node_decrement_usercount(np->ipnode); | |
224 | derefnode(iptree, np->ipnode); | |
225 | ||
226 | /* TODO: figure out how to cleanly remove nodes without affecting other modules */ | |
227 | ||
228 | /* Remove cloak entries for the user */ | |
229 | removecloaktarget(np); | |
230 | clearcloaktargets(np); | |
231 | ||
232 | /* Delete the nick from the servernick table */ | |
233 | *(gethandlebynumericunsafe(np->numeric))=NULL; | |
234 | ||
235 | /* Remove the nick from the hash table */ | |
236 | removenickfromhash(np); | |
237 | ||
238 | freenick(np); | |
239 | } | |
240 | ||
241 | void addnicktohash(nick *np) { | |
242 | np->next=nicktable[nickhash(np->nick)]; | |
243 | nicktable[nickhash(np->nick)]=np; | |
244 | } | |
245 | ||
246 | void removenickfromhash(nick *np) { | |
247 | nick **nh; | |
248 | ||
249 | for (nh=&(nicktable[nickhash(np->nick)]);*nh;nh=&((*nh)->next)) { | |
250 | if ((*nh)==np) { | |
251 | (*nh)=np->next; | |
252 | break; | |
253 | } | |
254 | } | |
255 | } | |
256 | ||
257 | nick *getnickbynick(const char *name) { | |
258 | nick *np; | |
259 | ||
260 | for (np=nicktable[nickhash(name)];np;np=np->next) { | |
261 | if (!ircd_strcmp(np->nick,name)) | |
262 | return np; | |
263 | } | |
264 | ||
265 | return NULL; | |
266 | } | |
267 | ||
268 | void nickstats(int hooknum, void *arg) { | |
269 | int total,maxchain,curchain,i,buckets; | |
270 | nick *np; | |
271 | char buf[200]; | |
272 | ||
273 | /* Get nick stats */ | |
274 | buckets=total=maxchain=curchain=0; | |
275 | for (i=0;i<NICKHASHSIZE;i++,curchain=0) { | |
276 | np=nicktable[i]; | |
277 | if (np!=NULL) { | |
278 | buckets++; | |
279 | for (;np;np=np->next) { | |
280 | total++; | |
281 | curchain++; | |
282 | } | |
283 | } | |
284 | if (curchain>maxchain) { | |
285 | maxchain=curchain; | |
286 | } | |
287 | } | |
288 | ||
289 | if ((long)arg>5) { | |
290 | /* Full stats */ | |
291 | sprintf(buf,"Nick : %6d nicks (HASH: %6d/%6d, chain %3d)",total,buckets,NICKHASHSIZE,maxchain); | |
292 | } else if ((long)arg>2) { | |
293 | sprintf(buf,"Nick : %6d users on network.",total); | |
294 | } | |
295 | ||
296 | if ((long)arg>2) { | |
297 | triggerhook(HOOK_CORE_STATSREPLY,buf); | |
298 | } | |
299 | } | |
300 | ||
301 | int registernickext(const char *name) { | |
302 | int i; | |
303 | ||
304 | if (findnickext(name)!=-1) { | |
305 | Error("nick",ERR_WARNING,"Tried to register duplicate nick extension %s",name); | |
306 | return -1; | |
307 | } | |
308 | ||
309 | for (i=0;i<MAXNICKEXTS;i++) { | |
310 | if (nickextnames[i]==NULL) { | |
311 | nickextnames[i]=getsstring(name,100); | |
312 | return i; | |
313 | } | |
314 | } | |
315 | ||
316 | Error("nick",ERR_WARNING,"Tried to register too many nick extensions: %s",name); | |
317 | return -1; | |
318 | } | |
319 | ||
320 | int findnickext(const char *name) { | |
321 | int i; | |
322 | ||
323 | for (i=0;i<MAXNICKEXTS;i++) { | |
324 | if (nickextnames[i]!=NULL && !ircd_strcmp(name,nickextnames[i]->content)) { | |
325 | return i; | |
326 | } | |
327 | } | |
328 | ||
329 | return -1; | |
330 | } | |
331 | ||
332 | void releasenickext(int index) { | |
333 | int i; | |
334 | nick *np; | |
335 | ||
336 | freesstring(nickextnames[index]); | |
337 | nickextnames[index]=NULL; | |
338 | ||
339 | for (i=0;i<NICKHASHSIZE;i++) { | |
340 | for (np=nicktable[i];np;np=np->next) { | |
341 | np->exts[index]=NULL; | |
342 | } | |
343 | } | |
344 | } | |
345 | ||
346 | /* visiblehostmask | |
347 | * Produces the "apparent" hostmask as seen by network users. | |
348 | */ | |
349 | ||
350 | char *visiblehostmask(nick *np, char *buf) { | |
351 | char uhbuf[USERLEN+HOSTLEN+2]; | |
352 | ||
353 | visibleuserhost(np, uhbuf); | |
354 | sprintf(buf,"%s!%s",np->nick,uhbuf); | |
355 | ||
356 | return buf; | |
357 | } | |
358 | ||
359 | /* visibleuserhost | |
360 | * As above without nick | |
361 | */ | |
362 | ||
363 | char *visibleuserhost(nick *np, char *buf) { | |
364 | char hostbuf[HOSTLEN+1]; | |
365 | char *ident, *host; | |
366 | ||
367 | ident=np->ident; | |
368 | host=np->host->name->content; | |
369 | ||
370 | if (IsSetHost(np)) { | |
371 | if (np->shident) { | |
372 | ident=np->shident->content; | |
373 | } | |
374 | if (np->sethost) { | |
375 | host=np->sethost->content; | |
376 | } | |
377 | } else if (IsAccount(np) && IsHideHost(np)) { | |
378 | sprintf(hostbuf,"%s.%s", np->authname, HIS_HIDDENHOST); | |
379 | host=hostbuf; | |
380 | } | |
381 | ||
382 | sprintf(buf,"%s@%s",ident,host); | |
383 | ||
384 | return buf; | |
385 | } | |
386 | ||
387 | #if 0 | |
388 | ||
389 | /* | |
390 | * gethandlebynumeric: | |
391 | * Given a numeric, gives the location in the servernicks table | |
392 | * where it should be. Does not check that the nick currently found | |
393 | * there (if any) has the correct numeric; this is left to the | |
394 | * calling function to figure out. | |
395 | */ | |
396 | ||
397 | nick **gethandlebynumeric(long numeric) { | |
398 | int servernum; | |
399 | int maskednum; | |
400 | server *serv; | |
401 | ||
402 | /* Shift off the client identifier part of the numeric to get the server ID */ | |
403 | servernum=(numeric>>18); | |
404 | ||
405 | if ((serv=getserverdata(servernum))==NULL) { | |
406 | Error("nick",ERR_WARNING,"Numeric %ld refers to non-existent server %d",numeric,servernum); | |
407 | return NULL; | |
408 | } | |
409 | ||
410 | /* Compute the masked numeric */ | |
411 | maskednum=numeric&(serv->maxusernum); | |
412 | ||
413 | return (servernicks[servernum])+maskednum; | |
414 | } | |
415 | ||
416 | /* | |
417 | * getnickbynumeric[str]() | |
418 | * These functions retrieve a nick based on it's numeric on the network | |
419 | * Use the approriate function depending on how your numeric is expressed.. | |
420 | */ | |
421 | ||
422 | nick *getnickbynumeric(long numeric) { | |
423 | nick **nh; | |
424 | ||
425 | nh=gethandlebynumeric(numeric); | |
426 | ||
427 | if ((*nh) && ((*nh)->numeric!=numeric)) { | |
428 | /* We found a masked numeric match, but the actual numeric | |
429 | * is different. This counts as a miss. */ | |
430 | return NULL; | |
431 | } | |
432 | ||
433 | return (*nh); | |
434 | } | |
435 | ||
436 | nick *getnickbynumericstr(char *numericstr) { | |
437 | return getnickbynumeric(numerictolong(numericstr,5)); | |
438 | } | |
439 | ||
440 | ||
441 | #endif | |
442 | ||
443 | int canseeuser(nick *np, nick *cloaked) | |
444 | { | |
445 | return (np == cloaked || | |
446 | !IsCloaked(cloaked) || | |
447 | np->cloak_extra == cloaked); | |
448 | } | |
449 | ||
450 | void addcloaktarget(nick *cloaked, nick *target) | |
451 | { | |
452 | removecloaktarget(target); | |
453 | ||
454 | target->cloak_extra = cloaked; | |
455 | cloaked->cloak_count++; | |
456 | } | |
457 | ||
458 | void removecloaktarget(nick *target) | |
459 | { | |
460 | if (target->cloak_extra) { | |
461 | target->cloak_extra->cloak_count--; | |
462 | target->cloak_extra = NULL; | |
463 | } | |
464 | } | |
465 | ||
466 | void clearcloaktargets(nick *cloaked) | |
467 | { | |
468 | nick *tnp; | |
469 | int j; | |
470 | ||
471 | if (cloaked->cloak_count == 0) | |
472 | return; | |
473 | ||
474 | for(j=0;j<NICKHASHSIZE;j++) | |
475 | for(tnp=nicktable[j];tnp;tnp=tnp->next) | |
476 | if (tnp->cloak_extra == cloaked) | |
477 | tnp->cloak_extra = NULL; | |
478 | ||
479 | cloaked->cloak_count = 0; | |
480 | } | |
481 |