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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" |
103521a1 | 15 | #include "../core/nsmalloc.h" |
16 | ||
c86edd1d Q |
17 | #include <stdlib.h> |
18 | #include <string.h> | |
19 | #include <stdio.h> | |
20 | ||
70b0a4e5 | 21 | MODULE_VERSION(""); |
87698d77 | 22 | |
c86edd1d Q |
23 | const flag umodeflags[] = { |
24 | { 'i', UMODE_INV }, | |
25 | { 'w', UMODE_WALLOPS }, | |
26 | { 'g', UMODE_DEBUG }, | |
27 | { 'o', UMODE_OPER }, | |
28 | { 'k', UMODE_SERVICE }, | |
29 | { 'X', UMODE_XOPER }, | |
30 | { 'd', UMODE_DEAF }, | |
31 | { 'r', UMODE_ACCOUNT }, | |
32 | { 'n', UMODE_HIDECHAN }, | |
33 | { 'x', UMODE_HIDEHOST }, | |
34 | { 'h', UMODE_SETHOST }, | |
35 | { 'R', UMODE_REGPRIV }, | |
36 | { 'I', UMODE_HIDEIDLE }, | |
e98d808a | 37 | { 'P', UMODE_PARANOID }, |
c86edd1d Q |
38 | { '\0', 0 } }; |
39 | ||
c153c0dc CP |
40 | const flag accountflags[] = { |
41 | { 's', AFLAG_STAFF }, | |
42 | { 'd', AFLAG_DEVELOPER }, | |
43 | { '\0', 0 } }; | |
44 | ||
c86edd1d Q |
45 | #define nickhash(x) ((crc32i(x))%NICKHASHSIZE) |
46 | ||
47 | nick *nicktable[NICKHASHSIZE]; | |
48 | nick **servernicks[MAXSERVERS]; | |
49 | ||
50 | sstring *nickextnames[MAXNICKEXTS]; | |
526e7c1d P |
51 | sstring *nodeextnames[PATRICIA_MAXSLOTS]; |
52 | patricia_tree_t *iptree; | |
c86edd1d Q |
53 | |
54 | void nickstats(int hooknum, void *arg); | |
55 | ||
56 | void _init() { | |
e31727be | 57 | unsigned int i; |
58 | authname *anp; | |
59 | ||
60 | /* Clear up the nicks in authext */ | |
61 | for (i=0;i<AUTHNAMEHASHSIZE;i++) | |
62 | for (anp=authnametable[i];anp;anp=anp->next) | |
63 | anp->nicks=NULL; | |
64 | ||
c86edd1d Q |
65 | initnickalloc(); |
66 | initnickhelpers(); | |
67 | memset(nicktable,0,sizeof(nicktable)); | |
68 | memset(servernicks,0,sizeof(servernicks)); | |
69 | ||
70 | /* Register our hooks */ | |
71 | registerhook(HOOK_SERVER_NEWSERVER,&handleserverchange); | |
72 | registerhook(HOOK_SERVER_LOSTSERVER,&handleserverchange); | |
73 | registerhook(HOOK_CORE_STATSREQUEST,&nickstats); | |
74 | ||
75 | /* And our server handlers */ | |
76 | registerserverhandler("N",&handlenickmsg,10); | |
77 | registerserverhandler("D",&handlekillmsg,2); | |
78 | registerserverhandler("Q",&handlequitmsg,1); | |
79 | registerserverhandler("M",&handleusermodemsg,3); | |
80 | registerserverhandler("W",&handlewhoismsg,2); | |
47657339 | 81 | registerserverhandler("AC",&handleaccountmsg,4); |
c86edd1d Q |
82 | registerserverhandler("R",&handlestatsmsg,2); |
83 | ||
84 | /* Fake the addition of our own server */ | |
85 | handleserverchange(HOOK_SERVER_NEWSERVER,(void *)numerictolong(mynumeric->content,2)); | |
526e7c1d P |
86 | |
87 | iptree = patricia_new_tree(PATRICIA_MAXBITS); | |
c86edd1d Q |
88 | } |
89 | ||
103521a1 | 90 | void _fini() { |
91 | nsfreeall(POOL_NICK); | |
92 | ||
93 | /* Free the hooks */ | |
94 | deregisterhook(HOOK_SERVER_NEWSERVER,&handleserverchange); | |
95 | deregisterhook(HOOK_SERVER_LOSTSERVER,&handleserverchange); | |
96 | deregisterhook(HOOK_CORE_STATSREQUEST,&nickstats); | |
97 | ||
98 | /* And our server handlers */ | |
99 | deregisterserverhandler("N",&handlenickmsg); | |
100 | deregisterserverhandler("D",&handlekillmsg); | |
101 | deregisterserverhandler("Q",&handlequitmsg); | |
102 | deregisterserverhandler("M",&handleusermodemsg); | |
103 | deregisterserverhandler("W",&handlewhoismsg); | |
104 | deregisterserverhandler("AC",&handleaccountmsg); | |
105 | deregisterserverhandler("R",&handlestatsmsg); | |
106 | } | |
107 | ||
c86edd1d Q |
108 | /* |
109 | * This function handles servers appearing and disappearing. | |
110 | * For a new server, the client table is allocated. | |
111 | * For a disappearing server, all it's clients are killed and the client table is freed. | |
112 | */ | |
113 | ||
114 | void handleserverchange(int hooknum, void *arg) { | |
c3db6f7e | 115 | long servernum; |
c86edd1d Q |
116 | int i; |
117 | ||
c3db6f7e | 118 | servernum=(long)arg; |
c86edd1d Q |
119 | |
120 | switch(hooknum) { | |
121 | case HOOK_SERVER_NEWSERVER: | |
103521a1 | 122 | servernicks[servernum]=(nick **)nsmalloc(POOL_NICK,(serverlist[servernum].maxusernum+1)*sizeof(nick **)); |
c86edd1d Q |
123 | memset(servernicks[servernum],0,(serverlist[servernum].maxusernum+1)*sizeof(nick **)); |
124 | break; | |
125 | ||
126 | case HOOK_SERVER_LOSTSERVER: | |
127 | for (i=0;i<=serverlist[servernum].maxusernum;i++) { | |
128 | if (servernicks[servernum][i]!=NULL) { | |
129 | deletenick(servernicks[servernum][i]); | |
130 | } | |
131 | } | |
2a010087 | 132 | nsfree(POOL_NICK,servernicks[servernum]); |
c86edd1d Q |
133 | break; |
134 | } | |
135 | } | |
136 | ||
137 | /* | |
138 | * deletenick: | |
139 | * | |
140 | * This function handles the removal of a nick from the network | |
141 | */ | |
142 | ||
143 | void deletenick(nick *np) { | |
144 | nick **nh; | |
145 | ||
146 | /* Fire the hook. This will deal with removal from channels etc. */ | |
147 | triggerhook(HOOK_NICK_LOSTNICK, np); | |
148 | ||
149 | /* Release the realname and hostname parts */ | |
150 | ||
151 | for (nh=&(np->realname->nicks);*nh;nh=&((*nh)->nextbyrealname)) { | |
152 | if (*nh==np) { | |
153 | *nh=np->nextbyrealname; | |
154 | break; | |
155 | } | |
156 | } | |
157 | ||
158 | for (nh=&(np->host->nicks);*nh;nh=&((*nh)->nextbyhost)) { | |
159 | if (*nh==np) { | |
160 | *nh=np->nextbyhost; | |
161 | break; | |
162 | } | |
163 | } | |
164 | ||
165 | releaserealname(np->realname); | |
166 | releasehost(np->host); | |
167 | ||
47657339 C |
168 | if(IsAccount(np) && np->auth) |
169 | { | |
170 | np->auth->usercount--; | |
171 | ||
172 | for (nh=&(np->auth->nicks);*nh;nh=&((*nh)->nextbyauthname)) { | |
173 | if (*nh==np) { | |
174 | *nh=np->nextbyauthname; | |
175 | break; | |
176 | } | |
177 | } | |
178 | ||
179 | releaseauthname(np->auth); | |
180 | } | |
181 | ||
c86edd1d Q |
182 | freesstring(np->shident); /* freesstring(NULL) is OK */ |
183 | freesstring(np->sethost); | |
184 | ||
c426783d | 185 | np->ipnode->usercount--; |
526e7c1d P |
186 | derefnode(iptree, np->ipnode); |
187 | ||
188 | /* TODO: figure out how to cleanly remove nodes without affecting other modules */ | |
189 | ||
c86edd1d Q |
190 | /* Delete the nick from the servernick table */ |
191 | *(gethandlebynumericunsafe(np->numeric))=NULL; | |
192 | ||
193 | /* Remove the nick from the hash table */ | |
194 | removenickfromhash(np); | |
195 | ||
196 | freenick(np); | |
197 | } | |
198 | ||
199 | void addnicktohash(nick *np) { | |
200 | np->next=nicktable[nickhash(np->nick)]; | |
201 | nicktable[nickhash(np->nick)]=np; | |
202 | } | |
203 | ||
204 | void removenickfromhash(nick *np) { | |
205 | nick **nh; | |
206 | ||
207 | for (nh=&(nicktable[nickhash(np->nick)]);*nh;nh=&((*nh)->next)) { | |
208 | if ((*nh)==np) { | |
209 | (*nh)=np->next; | |
210 | break; | |
211 | } | |
212 | } | |
213 | } | |
214 | ||
215 | nick *getnickbynick(const char *name) { | |
216 | nick *np; | |
217 | ||
218 | for (np=nicktable[nickhash(name)];np;np=np->next) { | |
219 | if (!ircd_strcmp(np->nick,name)) | |
220 | return np; | |
221 | } | |
222 | ||
223 | return NULL; | |
224 | } | |
225 | ||
226 | void nickstats(int hooknum, void *arg) { | |
227 | int total,maxchain,curchain,i,buckets; | |
228 | nick *np; | |
229 | char buf[200]; | |
230 | ||
231 | /* Get nick stats */ | |
232 | buckets=total=maxchain=curchain=0; | |
233 | for (i=0;i<NICKHASHSIZE;i++,curchain=0) { | |
234 | np=nicktable[i]; | |
235 | if (np!=NULL) { | |
236 | buckets++; | |
237 | for (;np;np=np->next) { | |
238 | total++; | |
239 | curchain++; | |
240 | } | |
241 | } | |
242 | if (curchain>maxchain) { | |
243 | maxchain=curchain; | |
244 | } | |
245 | } | |
246 | ||
c3db6f7e | 247 | if ((long)arg>5) { |
c86edd1d Q |
248 | /* Full stats */ |
249 | sprintf(buf,"Nick : %6d nicks (HASH: %6d/%6d, chain %3d)",total,buckets,NICKHASHSIZE,maxchain); | |
c3db6f7e | 250 | } else if ((long)arg>2) { |
c86edd1d Q |
251 | sprintf(buf,"Nick : %6d users on network.",total); |
252 | } | |
253 | ||
c3db6f7e | 254 | if ((long)arg>2) { |
c86edd1d Q |
255 | triggerhook(HOOK_CORE_STATSREPLY,buf); |
256 | } | |
257 | } | |
258 | ||
259 | int registernickext(const char *name) { | |
260 | int i; | |
261 | ||
262 | if (findnickext(name)!=-1) { | |
263 | Error("nick",ERR_WARNING,"Tried to register duplicate nick extension %s",name); | |
264 | return -1; | |
265 | } | |
266 | ||
267 | for (i=0;i<MAXNICKEXTS;i++) { | |
268 | if (nickextnames[i]==NULL) { | |
269 | nickextnames[i]=getsstring(name,100); | |
270 | return i; | |
271 | } | |
272 | } | |
273 | ||
47657339 | 274 | Error("nick",ERR_WARNING,"Tried to register too many nick extensions: %s",name); |
c86edd1d Q |
275 | return -1; |
276 | } | |
277 | ||
278 | int findnickext(const char *name) { | |
279 | int i; | |
280 | ||
281 | for (i=0;i<MAXNICKEXTS;i++) { | |
282 | if (nickextnames[i]!=NULL && !ircd_strcmp(name,nickextnames[i]->content)) { | |
283 | return i; | |
284 | } | |
285 | } | |
286 | ||
287 | return -1; | |
288 | } | |
289 | ||
290 | void releasenickext(int index) { | |
291 | int i; | |
292 | nick *np; | |
293 | ||
294 | freesstring(nickextnames[index]); | |
295 | nickextnames[index]=NULL; | |
296 | ||
297 | for (i=0;i<NICKHASHSIZE;i++) { | |
298 | for (np=nicktable[i];np;np=np->next) { | |
299 | np->exts[index]=NULL; | |
300 | } | |
301 | } | |
302 | } | |
303 | ||
304 | /* visiblehostmask | |
305 | * Produces the "apparent" hostmask as seen by network users. | |
306 | */ | |
307 | ||
308 | char *visiblehostmask(nick *np, char *buf) { | |
309 | char hostbuf[HOSTLEN+1]; | |
310 | char *ident, *host; | |
311 | ||
312 | ident=np->ident; | |
313 | host=np->host->name->content; | |
314 | ||
315 | if (IsSetHost(np)) { | |
316 | if (np->shident) { | |
317 | ident=np->shident->content; | |
318 | } | |
319 | if (np->sethost) { | |
320 | host=np->sethost->content; | |
321 | } | |
322 | } else if (IsAccount(np) && IsHideHost(np)) { | |
323 | sprintf(hostbuf,"%s.%s", np->authname, HIS_HIDDENHOST); | |
324 | host=hostbuf; | |
325 | } | |
326 | ||
327 | sprintf(buf,"%s!%s@%s",np->nick,ident,host); | |
328 | ||
329 | return buf; | |
330 | } | |
331 | ||
332 | #if 0 | |
333 | ||
334 | /* | |
335 | * gethandlebynumeric: | |
336 | * Given a numeric, gives the location in the servernicks table | |
337 | * where it should be. Does not check that the nick currently found | |
338 | * there (if any) has the correct numeric; this is left to the | |
339 | * calling function to figure out. | |
340 | */ | |
341 | ||
342 | nick **gethandlebynumeric(long numeric) { | |
343 | int servernum; | |
344 | int maskednum; | |
345 | server *serv; | |
346 | ||
347 | /* Shift off the client identifier part of the numeric to get the server ID */ | |
348 | servernum=(numeric>>18); | |
349 | ||
350 | if ((serv=getserverdata(servernum))==NULL) { | |
351 | Error("nick",ERR_WARNING,"Numeric %ld refers to non-existent server %d",numeric,servernum); | |
352 | return NULL; | |
353 | } | |
354 | ||
355 | /* Compute the masked numeric */ | |
356 | maskednum=numeric&(serv->maxusernum); | |
357 | ||
358 | return (servernicks[servernum])+maskednum; | |
359 | } | |
360 | ||
361 | /* | |
362 | * getnickbynumeric[str]() | |
363 | * These functions retrieve a nick based on it's numeric on the network | |
364 | * Use the approriate function depending on how your numeric is expressed.. | |
365 | */ | |
366 | ||
367 | nick *getnickbynumeric(long numeric) { | |
368 | nick **nh; | |
369 | ||
370 | nh=gethandlebynumeric(numeric); | |
371 | ||
372 | if ((*nh) && ((*nh)->numeric!=numeric)) { | |
373 | /* We found a masked numeric match, but the actual numeric | |
374 | * is different. This counts as a miss. */ | |
375 | return NULL; | |
376 | } | |
377 | ||
378 | return (*nh); | |
379 | } | |
380 | ||
381 | nick *getnickbynumericstr(char *numericstr) { | |
382 | return getnickbynumeric(numerictolong(numericstr,5)); | |
383 | } | |
384 | ||
385 | #endif | |
526e7c1d P |
386 | |
387 | int registernodeext(const char *name) { | |
388 | int i; | |
389 | ||
390 | if (findnodeext(name)!=-1) { | |
391 | Error("nick",ERR_WARNING,"Tried to register duplicate node extension %s",name); | |
392 | return -1; | |
393 | } | |
394 | ||
395 | for (i=0;i<PATRICIA_MAXSLOTS;i++) { | |
396 | if (nodeextnames[i]==NULL) { | |
397 | nodeextnames[i]=getsstring(name,100); | |
398 | return i; | |
399 | } | |
400 | } | |
401 | ||
402 | Error("nick",ERR_WARNING,"Tried to register too many extensions: %s",name); | |
403 | return -1; | |
404 | } | |
405 | ||
406 | int findnodeext(const char *name) { | |
407 | int i; | |
408 | ||
409 | for (i=0;i<PATRICIA_MAXSLOTS;i++) { | |
410 | if (nodeextnames[i]!=NULL && !ircd_strcmp(name,nodeextnames[i]->content)) { | |
411 | return i; | |
412 | } | |
413 | } | |
414 | ||
415 | return -1; | |
416 | } | |
417 | ||
418 | void releasenodeext(int index) { | |
419 | patricia_node_t *head, *node; | |
420 | ||
421 | freesstring(nodeextnames[index]); | |
422 | nodeextnames[index]=NULL; | |
423 | ||
424 | head = iptree->head; | |
425 | ||
426 | PATRICIA_WALK_ALL(head, node) | |
427 | { | |
a8ba1373 | 428 | node->exts[index]=NULL; |
526e7c1d P |
429 | } PATRICIA_WALK_END; |
430 | } |