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Commit | Line | Data |
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c86edd1d Q |
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" | |
87698d77 | 14 | #include "../lib/version.h" |
4208eafd | 15 | #include "../lib/ccassert.h" |
103521a1 | 16 | #include "../core/nsmalloc.h" |
17 | ||
c86edd1d Q |
18 | #include <stdlib.h> |
19 | #include <string.h> | |
20 | #include <stdio.h> | |
21 | ||
70b0a4e5 | 22 | MODULE_VERSION(""); |
87698d77 | 23 | |
4208eafd GB |
24 | CCASSERT(sizeof(host) == sizeof(realname)); |
25 | ||
c86edd1d Q |
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 }, | |
e98d808a | 40 | { 'P', UMODE_PARANOID }, |
c9d0dfa3 GB |
41 | { 'q', UMODE_COMCHANS }, |
42 | { 'Q', UMODE_COMCHANSRESTR }, | |
42d7af35 | 43 | { 'C', UMODE_CLOAKED }, |
c86edd1d Q |
44 | { '\0', 0 } }; |
45 | ||
c153c0dc | 46 | const flag accountflags[] = { |
c4ffdb9b | 47 | { 'q', AFLAG_STAFF }, |
3294b10b | 48 | { 'h', AFLAG_SUPPORT }, |
c4ffdb9b CP |
49 | { 'o', AFLAG_OPER }, |
50 | { 'a', AFLAG_ADMIN }, | |
c153c0dc CP |
51 | { 'd', AFLAG_DEVELOPER }, |
52 | { '\0', 0 } }; | |
53 | ||
c86edd1d Q |
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 | ||
3404a8f0 CP |
63 | char *NULLAUTHNAME = ""; |
64 | ||
c86edd1d | 65 | void _init() { |
e31727be | 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 | ||
c86edd1d Q |
74 | initnickhelpers(); |
75 | memset(nicktable,0,sizeof(nicktable)); | |
76 | memset(servernicks,0,sizeof(servernicks)); | |
86a9e70c P |
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 | } | |
c86edd1d Q |
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); | |
47657339 | 95 | registerserverhandler("AC",&handleaccountmsg,4); |
6885ae9c | 96 | registerserverhandler("P",&handleprivmsg,2); |
5144ddc4 | 97 | registerserverhandler("A",&handleawaymsg,1); |
42d7af35 GB |
98 | registerserverhandler("CA",&handleaddcloak,1); |
99 | registerserverhandler("CU",&handleclearcloak,0); | |
c86edd1d Q |
100 | |
101 | /* Fake the addition of our own server */ | |
102 | handleserverchange(HOOK_SERVER_NEWSERVER,(void *)numerictolong(mynumeric->content,2)); | |
103 | } | |
104 | ||
103521a1 | 105 | void _fini() { |
9cf0b03f CP |
106 | nick *np; |
107 | int i; | |
108 | ||
707c5824 | 109 | fininickhelpers(); |
9cf0b03f CP |
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); | |
843184e3 | 115 | freesstring(np->opername); |
3404a8f0 | 116 | if(!np->auth && np->authname && (np->authname != NULLAUTHNAME)) |
3294b10b | 117 | free(np->authname); |
9cf0b03f CP |
118 | } |
119 | } | |
120 | ||
df5ab174 | 121 | nsfreeall(POOL_NICK); |
707c5824 | 122 | |
103521a1 | 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); | |
7bec4aeb | 133 | deregisterserverhandler("AC",&handleaccountmsg); |
6885ae9c | 134 | deregisterserverhandler("P",&handleprivmsg); |
5144ddc4 | 135 | deregisterserverhandler("A",&handleawaymsg); |
42d7af35 GB |
136 | deregisterserverhandler("CA",&handleaddcloak); |
137 | deregisterserverhandler("CU",&handleclearcloak); | |
103521a1 | 138 | } |
139 | ||
c86edd1d Q |
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) { | |
c3db6f7e | 147 | long servernum; |
c86edd1d Q |
148 | int i; |
149 | ||
c3db6f7e | 150 | servernum=(long)arg; |
c86edd1d Q |
151 | |
152 | switch(hooknum) { | |
153 | case HOOK_SERVER_NEWSERVER: | |
103521a1 | 154 | servernicks[servernum]=(nick **)nsmalloc(POOL_NICK,(serverlist[servernum].maxusernum+1)*sizeof(nick **)); |
c86edd1d Q |
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 | } | |
2a010087 | 164 | nsfree(POOL_NICK,servernicks[servernum]); |
c86edd1d Q |
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 | ||
3294b10b CP |
200 | if(IsAccount(np)) { |
201 | if(!np->auth) { | |
3404a8f0 | 202 | if(np->authname && (np->authname != NULLAUTHNAME)) |
3294b10b CP |
203 | free(np->authname); |
204 | } else { | |
205 | np->auth->usercount--; | |
47657339 | 206 | |
3294b10b CP |
207 | for (nh=&(np->auth->nicks);*nh;nh=&((*nh)->nextbyauthname)) { |
208 | if (*nh==np) { | |
209 | *nh=np->nextbyauthname; | |
210 | break; | |
211 | } | |
47657339 | 212 | } |
47657339 | 213 | |
3294b10b CP |
214 | releaseauthname(np->auth); |
215 | } | |
47657339 C |
216 | } |
217 | ||
c86edd1d Q |
218 | freesstring(np->shident); /* freesstring(NULL) is OK */ |
219 | freesstring(np->sethost); | |
843184e3 | 220 | freesstring(np->opername); |
c86edd1d | 221 | |
96644df6 | 222 | node_decrement_usercount(np->ipnode); |
526e7c1d P |
223 | derefnode(iptree, np->ipnode); |
224 | ||
225 | /* TODO: figure out how to cleanly remove nodes without affecting other modules */ | |
226 | ||
42d7af35 GB |
227 | /* Remove cloak entries for the user */ |
228 | removecloaktarget(np); | |
229 | clearcloaktargets(np); | |
230 | ||
c86edd1d Q |
231 | /* Delete the nick from the servernick table */ |
232 | *(gethandlebynumericunsafe(np->numeric))=NULL; | |
233 | ||
234 | /* Remove the nick from the hash table */ | |
235 | removenickfromhash(np); | |
236 | ||
237 | freenick(np); | |
238 | } | |
239 | ||
240 | void addnicktohash(nick *np) { | |
241 | np->next=nicktable[nickhash(np->nick)]; | |
242 | nicktable[nickhash(np->nick)]=np; | |
243 | } | |
244 | ||
245 | void removenickfromhash(nick *np) { | |
246 | nick **nh; | |
247 | ||
248 | for (nh=&(nicktable[nickhash(np->nick)]);*nh;nh=&((*nh)->next)) { | |
249 | if ((*nh)==np) { | |
250 | (*nh)=np->next; | |
251 | break; | |
252 | } | |
253 | } | |
254 | } | |
255 | ||
256 | nick *getnickbynick(const char *name) { | |
257 | nick *np; | |
258 | ||
259 | for (np=nicktable[nickhash(name)];np;np=np->next) { | |
260 | if (!ircd_strcmp(np->nick,name)) | |
261 | return np; | |
262 | } | |
263 | ||
264 | return NULL; | |
265 | } | |
266 | ||
267 | void nickstats(int hooknum, void *arg) { | |
268 | int total,maxchain,curchain,i,buckets; | |
269 | nick *np; | |
270 | char buf[200]; | |
271 | ||
272 | /* Get nick stats */ | |
273 | buckets=total=maxchain=curchain=0; | |
274 | for (i=0;i<NICKHASHSIZE;i++,curchain=0) { | |
275 | np=nicktable[i]; | |
276 | if (np!=NULL) { | |
277 | buckets++; | |
278 | for (;np;np=np->next) { | |
279 | total++; | |
280 | curchain++; | |
281 | } | |
282 | } | |
283 | if (curchain>maxchain) { | |
284 | maxchain=curchain; | |
285 | } | |
286 | } | |
287 | ||
c3db6f7e | 288 | if ((long)arg>5) { |
c86edd1d Q |
289 | /* Full stats */ |
290 | sprintf(buf,"Nick : %6d nicks (HASH: %6d/%6d, chain %3d)",total,buckets,NICKHASHSIZE,maxchain); | |
c3db6f7e | 291 | } else if ((long)arg>2) { |
c86edd1d Q |
292 | sprintf(buf,"Nick : %6d users on network.",total); |
293 | } | |
294 | ||
c3db6f7e | 295 | if ((long)arg>2) { |
c86edd1d Q |
296 | triggerhook(HOOK_CORE_STATSREPLY,buf); |
297 | } | |
298 | } | |
299 | ||
300 | int registernickext(const char *name) { | |
301 | int i; | |
302 | ||
303 | if (findnickext(name)!=-1) { | |
304 | Error("nick",ERR_WARNING,"Tried to register duplicate nick extension %s",name); | |
305 | return -1; | |
306 | } | |
307 | ||
308 | for (i=0;i<MAXNICKEXTS;i++) { | |
309 | if (nickextnames[i]==NULL) { | |
310 | nickextnames[i]=getsstring(name,100); | |
311 | return i; | |
312 | } | |
313 | } | |
314 | ||
47657339 | 315 | Error("nick",ERR_WARNING,"Tried to register too many nick extensions: %s",name); |
c86edd1d Q |
316 | return -1; |
317 | } | |
318 | ||
319 | int findnickext(const char *name) { | |
320 | int i; | |
321 | ||
322 | for (i=0;i<MAXNICKEXTS;i++) { | |
323 | if (nickextnames[i]!=NULL && !ircd_strcmp(name,nickextnames[i]->content)) { | |
324 | return i; | |
325 | } | |
326 | } | |
327 | ||
328 | return -1; | |
329 | } | |
330 | ||
331 | void releasenickext(int index) { | |
332 | int i; | |
333 | nick *np; | |
334 | ||
335 | freesstring(nickextnames[index]); | |
336 | nickextnames[index]=NULL; | |
337 | ||
338 | for (i=0;i<NICKHASHSIZE;i++) { | |
339 | for (np=nicktable[i];np;np=np->next) { | |
340 | np->exts[index]=NULL; | |
341 | } | |
342 | } | |
343 | } | |
344 | ||
345 | /* visiblehostmask | |
346 | * Produces the "apparent" hostmask as seen by network users. | |
347 | */ | |
348 | ||
349 | char *visiblehostmask(nick *np, char *buf) { | |
28252fef | 350 | char uhbuf[USERLEN+HOSTLEN+2]; |
351 | ||
352 | visibleuserhost(np, uhbuf); | |
353 | sprintf(buf,"%s!%s",np->nick,uhbuf); | |
354 | ||
355 | return buf; | |
356 | } | |
357 | ||
358 | /* visibleuserhost | |
359 | * As above without nick | |
360 | */ | |
361 | ||
362 | char *visibleuserhost(nick *np, char *buf) { | |
c86edd1d Q |
363 | char hostbuf[HOSTLEN+1]; |
364 | char *ident, *host; | |
365 | ||
366 | ident=np->ident; | |
367 | host=np->host->name->content; | |
368 | ||
369 | if (IsSetHost(np)) { | |
370 | if (np->shident) { | |
371 | ident=np->shident->content; | |
372 | } | |
373 | if (np->sethost) { | |
374 | host=np->sethost->content; | |
375 | } | |
376 | } else if (IsAccount(np) && IsHideHost(np)) { | |
377 | sprintf(hostbuf,"%s.%s", np->authname, HIS_HIDDENHOST); | |
378 | host=hostbuf; | |
379 | } | |
380 | ||
28252fef | 381 | sprintf(buf,"%s@%s",ident,host); |
c86edd1d Q |
382 | |
383 | return buf; | |
384 | } | |
385 | ||
386 | #if 0 | |
387 | ||
388 | /* | |
389 | * gethandlebynumeric: | |
390 | * Given a numeric, gives the location in the servernicks table | |
391 | * where it should be. Does not check that the nick currently found | |
392 | * there (if any) has the correct numeric; this is left to the | |
393 | * calling function to figure out. | |
394 | */ | |
395 | ||
396 | nick **gethandlebynumeric(long numeric) { | |
397 | int servernum; | |
398 | int maskednum; | |
399 | server *serv; | |
400 | ||
401 | /* Shift off the client identifier part of the numeric to get the server ID */ | |
402 | servernum=(numeric>>18); | |
403 | ||
404 | if ((serv=getserverdata(servernum))==NULL) { | |
405 | Error("nick",ERR_WARNING,"Numeric %ld refers to non-existent server %d",numeric,servernum); | |
406 | return NULL; | |
407 | } | |
408 | ||
409 | /* Compute the masked numeric */ | |
410 | maskednum=numeric&(serv->maxusernum); | |
411 | ||
412 | return (servernicks[servernum])+maskednum; | |
413 | } | |
414 | ||
415 | /* | |
416 | * getnickbynumeric[str]() | |
417 | * These functions retrieve a nick based on it's numeric on the network | |
418 | * Use the approriate function depending on how your numeric is expressed.. | |
419 | */ | |
420 | ||
421 | nick *getnickbynumeric(long numeric) { | |
422 | nick **nh; | |
423 | ||
424 | nh=gethandlebynumeric(numeric); | |
425 | ||
426 | if ((*nh) && ((*nh)->numeric!=numeric)) { | |
427 | /* We found a masked numeric match, but the actual numeric | |
428 | * is different. This counts as a miss. */ | |
429 | return NULL; | |
430 | } | |
431 | ||
432 | return (*nh); | |
433 | } | |
434 | ||
435 | nick *getnickbynumericstr(char *numericstr) { | |
436 | return getnickbynumeric(numerictolong(numericstr,5)); | |
437 | } | |
438 | ||
cebc4cab | 439 | |
c86edd1d | 440 | #endif |
526e7c1d | 441 | |
42d7af35 GB |
442 | int canseeuser(nick *np, nick *cloaked) |
443 | { | |
444 | return (np == cloaked || | |
445 | !IsCloaked(cloaked) || | |
446 | np->cloak_extra == cloaked); | |
447 | } | |
448 | ||
449 | void addcloaktarget(nick *cloaked, nick *target) | |
450 | { | |
451 | removecloaktarget(target); | |
452 | ||
453 | target->cloak_extra = cloaked; | |
454 | cloaked->cloak_count++; | |
455 | } | |
456 | ||
457 | void removecloaktarget(nick *target) | |
458 | { | |
459 | if (target->cloak_extra) { | |
460 | target->cloak_extra->cloak_count--; | |
461 | target->cloak_extra = NULL; | |
462 | } | |
463 | } | |
464 | ||
465 | void clearcloaktargets(nick *cloaked) | |
466 | { | |
467 | nick *tnp; | |
468 | int j; | |
469 | ||
260e4351 GB |
470 | if (cloaked->cloak_count == 0) |
471 | return; | |
472 | ||
42d7af35 GB |
473 | for(j=0;j<NICKHASHSIZE;j++) |
474 | for(tnp=nicktable[j];tnp;tnp=tnp->next) | |
475 | if (tnp->cloak_extra == cloaked) | |
476 | tnp->cloak_extra = NULL; | |
477 | ||
478 | cloaked->cloak_count = 0; | |
479 | } | |
480 |