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