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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 | 40 | const flag accountflags[] = { |
c4ffdb9b | 41 | { 'q', AFLAG_STAFF }, |
3294b10b | 42 | { 'h', AFLAG_SUPPORT }, |
c4ffdb9b CP |
43 | { 'o', AFLAG_OPER }, |
44 | { 'a', AFLAG_ADMIN }, | |
c153c0dc CP |
45 | { 'd', AFLAG_DEVELOPER }, |
46 | { '\0', 0 } }; | |
47 | ||
c86edd1d Q |
48 | #define nickhash(x) ((crc32i(x))%NICKHASHSIZE) |
49 | ||
50 | nick *nicktable[NICKHASHSIZE]; | |
51 | nick **servernicks[MAXSERVERS]; | |
52 | ||
53 | sstring *nickextnames[MAXNICKEXTS]; | |
54 | ||
55 | void nickstats(int hooknum, void *arg); | |
56 | ||
3404a8f0 CP |
57 | char *NULLAUTHNAME = ""; |
58 | ||
c86edd1d | 59 | void _init() { |
e31727be | 60 | unsigned int i; |
61 | authname *anp; | |
62 | ||
63 | /* Clear up the nicks in authext */ | |
64 | for (i=0;i<AUTHNAMEHASHSIZE;i++) | |
65 | for (anp=authnametable[i];anp;anp=anp->next) | |
66 | anp->nicks=NULL; | |
67 | ||
c86edd1d Q |
68 | initnickalloc(); |
69 | initnickhelpers(); | |
70 | memset(nicktable,0,sizeof(nicktable)); | |
71 | memset(servernicks,0,sizeof(servernicks)); | |
72 | ||
73 | /* Register our hooks */ | |
74 | registerhook(HOOK_SERVER_NEWSERVER,&handleserverchange); | |
75 | registerhook(HOOK_SERVER_LOSTSERVER,&handleserverchange); | |
76 | registerhook(HOOK_CORE_STATSREQUEST,&nickstats); | |
77 | ||
78 | /* And our server handlers */ | |
79 | registerserverhandler("N",&handlenickmsg,10); | |
80 | registerserverhandler("D",&handlekillmsg,2); | |
81 | registerserverhandler("Q",&handlequitmsg,1); | |
82 | registerserverhandler("M",&handleusermodemsg,3); | |
83 | registerserverhandler("W",&handlewhoismsg,2); | |
47657339 | 84 | registerserverhandler("AC",&handleaccountmsg,4); |
c86edd1d | 85 | registerserverhandler("R",&handlestatsmsg,2); |
6885ae9c | 86 | registerserverhandler("P",&handleprivmsg,2); |
c86edd1d Q |
87 | |
88 | /* Fake the addition of our own server */ | |
89 | handleserverchange(HOOK_SERVER_NEWSERVER,(void *)numerictolong(mynumeric->content,2)); | |
90 | } | |
91 | ||
103521a1 | 92 | void _fini() { |
9cf0b03f CP |
93 | nick *np; |
94 | int i; | |
95 | ||
707c5824 | 96 | fininickhelpers(); |
9cf0b03f CP |
97 | |
98 | for (i=0;i<NICKHASHSIZE;i++) { | |
99 | for (np=nicktable[i];np;np=np->next) { | |
100 | freesstring(np->shident); | |
101 | freesstring(np->sethost); | |
843184e3 | 102 | freesstring(np->opername); |
3404a8f0 | 103 | if(!np->auth && np->authname && (np->authname != NULLAUTHNAME)) |
3294b10b | 104 | free(np->authname); |
9cf0b03f CP |
105 | } |
106 | } | |
107 | ||
df5ab174 | 108 | nsfreeall(POOL_NICK); |
707c5824 | 109 | |
103521a1 | 110 | /* Free the hooks */ |
111 | deregisterhook(HOOK_SERVER_NEWSERVER,&handleserverchange); | |
112 | deregisterhook(HOOK_SERVER_LOSTSERVER,&handleserverchange); | |
113 | deregisterhook(HOOK_CORE_STATSREQUEST,&nickstats); | |
114 | ||
115 | /* And our server handlers */ | |
116 | deregisterserverhandler("N",&handlenickmsg); | |
117 | deregisterserverhandler("D",&handlekillmsg); | |
118 | deregisterserverhandler("Q",&handlequitmsg); | |
119 | deregisterserverhandler("M",&handleusermodemsg); | |
120 | deregisterserverhandler("W",&handlewhoismsg); | |
121 | deregisterserverhandler("AC",&handleaccountmsg); | |
122 | deregisterserverhandler("R",&handlestatsmsg); | |
6885ae9c | 123 | deregisterserverhandler("P",&handleprivmsg); |
103521a1 | 124 | } |
125 | ||
c86edd1d Q |
126 | /* |
127 | * This function handles servers appearing and disappearing. | |
128 | * For a new server, the client table is allocated. | |
129 | * For a disappearing server, all it's clients are killed and the client table is freed. | |
130 | */ | |
131 | ||
132 | void handleserverchange(int hooknum, void *arg) { | |
c3db6f7e | 133 | long servernum; |
c86edd1d Q |
134 | int i; |
135 | ||
c3db6f7e | 136 | servernum=(long)arg; |
c86edd1d Q |
137 | |
138 | switch(hooknum) { | |
139 | case HOOK_SERVER_NEWSERVER: | |
103521a1 | 140 | servernicks[servernum]=(nick **)nsmalloc(POOL_NICK,(serverlist[servernum].maxusernum+1)*sizeof(nick **)); |
c86edd1d Q |
141 | memset(servernicks[servernum],0,(serverlist[servernum].maxusernum+1)*sizeof(nick **)); |
142 | break; | |
143 | ||
144 | case HOOK_SERVER_LOSTSERVER: | |
145 | for (i=0;i<=serverlist[servernum].maxusernum;i++) { | |
146 | if (servernicks[servernum][i]!=NULL) { | |
147 | deletenick(servernicks[servernum][i]); | |
148 | } | |
149 | } | |
2a010087 | 150 | nsfree(POOL_NICK,servernicks[servernum]); |
c86edd1d Q |
151 | break; |
152 | } | |
153 | } | |
154 | ||
155 | /* | |
156 | * deletenick: | |
157 | * | |
158 | * This function handles the removal of a nick from the network | |
159 | */ | |
160 | ||
161 | void deletenick(nick *np) { | |
162 | nick **nh; | |
163 | ||
164 | /* Fire the hook. This will deal with removal from channels etc. */ | |
165 | triggerhook(HOOK_NICK_LOSTNICK, np); | |
166 | ||
167 | /* Release the realname and hostname parts */ | |
168 | ||
169 | for (nh=&(np->realname->nicks);*nh;nh=&((*nh)->nextbyrealname)) { | |
170 | if (*nh==np) { | |
171 | *nh=np->nextbyrealname; | |
172 | break; | |
173 | } | |
174 | } | |
175 | ||
176 | for (nh=&(np->host->nicks);*nh;nh=&((*nh)->nextbyhost)) { | |
177 | if (*nh==np) { | |
178 | *nh=np->nextbyhost; | |
179 | break; | |
180 | } | |
181 | } | |
182 | ||
183 | releaserealname(np->realname); | |
184 | releasehost(np->host); | |
185 | ||
3294b10b CP |
186 | if(IsAccount(np)) { |
187 | if(!np->auth) { | |
3404a8f0 | 188 | if(np->authname && (np->authname != NULLAUTHNAME)) |
3294b10b CP |
189 | free(np->authname); |
190 | } else { | |
191 | np->auth->usercount--; | |
47657339 | 192 | |
3294b10b CP |
193 | for (nh=&(np->auth->nicks);*nh;nh=&((*nh)->nextbyauthname)) { |
194 | if (*nh==np) { | |
195 | *nh=np->nextbyauthname; | |
196 | break; | |
197 | } | |
47657339 | 198 | } |
47657339 | 199 | |
3294b10b CP |
200 | releaseauthname(np->auth); |
201 | } | |
47657339 C |
202 | } |
203 | ||
c86edd1d Q |
204 | freesstring(np->shident); /* freesstring(NULL) is OK */ |
205 | freesstring(np->sethost); | |
843184e3 | 206 | freesstring(np->opername); |
c86edd1d | 207 | |
96644df6 | 208 | node_decrement_usercount(np->ipnode); |
526e7c1d P |
209 | derefnode(iptree, np->ipnode); |
210 | ||
211 | /* TODO: figure out how to cleanly remove nodes without affecting other modules */ | |
212 | ||
c86edd1d Q |
213 | /* Delete the nick from the servernick table */ |
214 | *(gethandlebynumericunsafe(np->numeric))=NULL; | |
215 | ||
216 | /* Remove the nick from the hash table */ | |
217 | removenickfromhash(np); | |
218 | ||
219 | freenick(np); | |
220 | } | |
221 | ||
222 | void addnicktohash(nick *np) { | |
223 | np->next=nicktable[nickhash(np->nick)]; | |
224 | nicktable[nickhash(np->nick)]=np; | |
225 | } | |
226 | ||
227 | void removenickfromhash(nick *np) { | |
228 | nick **nh; | |
229 | ||
230 | for (nh=&(nicktable[nickhash(np->nick)]);*nh;nh=&((*nh)->next)) { | |
231 | if ((*nh)==np) { | |
232 | (*nh)=np->next; | |
233 | break; | |
234 | } | |
235 | } | |
236 | } | |
237 | ||
238 | nick *getnickbynick(const char *name) { | |
239 | nick *np; | |
240 | ||
241 | for (np=nicktable[nickhash(name)];np;np=np->next) { | |
242 | if (!ircd_strcmp(np->nick,name)) | |
243 | return np; | |
244 | } | |
245 | ||
246 | return NULL; | |
247 | } | |
248 | ||
249 | void nickstats(int hooknum, void *arg) { | |
250 | int total,maxchain,curchain,i,buckets; | |
251 | nick *np; | |
252 | char buf[200]; | |
253 | ||
254 | /* Get nick stats */ | |
255 | buckets=total=maxchain=curchain=0; | |
256 | for (i=0;i<NICKHASHSIZE;i++,curchain=0) { | |
257 | np=nicktable[i]; | |
258 | if (np!=NULL) { | |
259 | buckets++; | |
260 | for (;np;np=np->next) { | |
261 | total++; | |
262 | curchain++; | |
263 | } | |
264 | } | |
265 | if (curchain>maxchain) { | |
266 | maxchain=curchain; | |
267 | } | |
268 | } | |
269 | ||
c3db6f7e | 270 | if ((long)arg>5) { |
c86edd1d Q |
271 | /* Full stats */ |
272 | sprintf(buf,"Nick : %6d nicks (HASH: %6d/%6d, chain %3d)",total,buckets,NICKHASHSIZE,maxchain); | |
c3db6f7e | 273 | } else if ((long)arg>2) { |
c86edd1d Q |
274 | sprintf(buf,"Nick : %6d users on network.",total); |
275 | } | |
276 | ||
c3db6f7e | 277 | if ((long)arg>2) { |
c86edd1d Q |
278 | triggerhook(HOOK_CORE_STATSREPLY,buf); |
279 | } | |
280 | } | |
281 | ||
282 | int registernickext(const char *name) { | |
283 | int i; | |
284 | ||
285 | if (findnickext(name)!=-1) { | |
286 | Error("nick",ERR_WARNING,"Tried to register duplicate nick extension %s",name); | |
287 | return -1; | |
288 | } | |
289 | ||
290 | for (i=0;i<MAXNICKEXTS;i++) { | |
291 | if (nickextnames[i]==NULL) { | |
292 | nickextnames[i]=getsstring(name,100); | |
293 | return i; | |
294 | } | |
295 | } | |
296 | ||
47657339 | 297 | Error("nick",ERR_WARNING,"Tried to register too many nick extensions: %s",name); |
c86edd1d Q |
298 | return -1; |
299 | } | |
300 | ||
301 | int findnickext(const char *name) { | |
302 | int i; | |
303 | ||
304 | for (i=0;i<MAXNICKEXTS;i++) { | |
305 | if (nickextnames[i]!=NULL && !ircd_strcmp(name,nickextnames[i]->content)) { | |
306 | return i; | |
307 | } | |
308 | } | |
309 | ||
310 | return -1; | |
311 | } | |
312 | ||
313 | void releasenickext(int index) { | |
314 | int i; | |
315 | nick *np; | |
316 | ||
317 | freesstring(nickextnames[index]); | |
318 | nickextnames[index]=NULL; | |
319 | ||
320 | for (i=0;i<NICKHASHSIZE;i++) { | |
321 | for (np=nicktable[i];np;np=np->next) { | |
322 | np->exts[index]=NULL; | |
323 | } | |
324 | } | |
325 | } | |
326 | ||
327 | /* visiblehostmask | |
328 | * Produces the "apparent" hostmask as seen by network users. | |
329 | */ | |
330 | ||
331 | char *visiblehostmask(nick *np, char *buf) { | |
28252fef | 332 | char uhbuf[USERLEN+HOSTLEN+2]; |
333 | ||
334 | visibleuserhost(np, uhbuf); | |
335 | sprintf(buf,"%s!%s",np->nick,uhbuf); | |
336 | ||
337 | return buf; | |
338 | } | |
339 | ||
340 | /* visibleuserhost | |
341 | * As above without nick | |
342 | */ | |
343 | ||
344 | char *visibleuserhost(nick *np, char *buf) { | |
c86edd1d Q |
345 | char hostbuf[HOSTLEN+1]; |
346 | char *ident, *host; | |
347 | ||
348 | ident=np->ident; | |
349 | host=np->host->name->content; | |
350 | ||
351 | if (IsSetHost(np)) { | |
352 | if (np->shident) { | |
353 | ident=np->shident->content; | |
354 | } | |
355 | if (np->sethost) { | |
356 | host=np->sethost->content; | |
357 | } | |
358 | } else if (IsAccount(np) && IsHideHost(np)) { | |
359 | sprintf(hostbuf,"%s.%s", np->authname, HIS_HIDDENHOST); | |
360 | host=hostbuf; | |
361 | } | |
362 | ||
28252fef | 363 | sprintf(buf,"%s@%s",ident,host); |
c86edd1d Q |
364 | |
365 | return buf; | |
366 | } | |
367 | ||
368 | #if 0 | |
369 | ||
370 | /* | |
371 | * gethandlebynumeric: | |
372 | * Given a numeric, gives the location in the servernicks table | |
373 | * where it should be. Does not check that the nick currently found | |
374 | * there (if any) has the correct numeric; this is left to the | |
375 | * calling function to figure out. | |
376 | */ | |
377 | ||
378 | nick **gethandlebynumeric(long numeric) { | |
379 | int servernum; | |
380 | int maskednum; | |
381 | server *serv; | |
382 | ||
383 | /* Shift off the client identifier part of the numeric to get the server ID */ | |
384 | servernum=(numeric>>18); | |
385 | ||
386 | if ((serv=getserverdata(servernum))==NULL) { | |
387 | Error("nick",ERR_WARNING,"Numeric %ld refers to non-existent server %d",numeric,servernum); | |
388 | return NULL; | |
389 | } | |
390 | ||
391 | /* Compute the masked numeric */ | |
392 | maskednum=numeric&(serv->maxusernum); | |
393 | ||
394 | return (servernicks[servernum])+maskednum; | |
395 | } | |
396 | ||
397 | /* | |
398 | * getnickbynumeric[str]() | |
399 | * These functions retrieve a nick based on it's numeric on the network | |
400 | * Use the approriate function depending on how your numeric is expressed.. | |
401 | */ | |
402 | ||
403 | nick *getnickbynumeric(long numeric) { | |
404 | nick **nh; | |
405 | ||
406 | nh=gethandlebynumeric(numeric); | |
407 | ||
408 | if ((*nh) && ((*nh)->numeric!=numeric)) { | |
409 | /* We found a masked numeric match, but the actual numeric | |
410 | * is different. This counts as a miss. */ | |
411 | return NULL; | |
412 | } | |
413 | ||
414 | return (*nh); | |
415 | } | |
416 | ||
417 | nick *getnickbynumericstr(char *numericstr) { | |
418 | return getnickbynumeric(numerictolong(numericstr,5)); | |
419 | } | |
420 | ||
421 | #endif | |
526e7c1d | 422 |