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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)); | |
86a9e70c P |
72 | |
73 | /* If we're connected to IRC, force a disconnect. This needs to be done | |
74 | * before we register all our hooks which would otherwise get called | |
75 | * during the disconnect. */ | |
76 | if (connected) { | |
77 | irc_send("%s SQ %s 0 :Resync [adding nick support]",mynumeric->content,myserver->content); irc_disconnected(); | |
78 | } | |
c86edd1d Q |
79 | |
80 | /* Register our hooks */ | |
81 | registerhook(HOOK_SERVER_NEWSERVER,&handleserverchange); | |
82 | registerhook(HOOK_SERVER_LOSTSERVER,&handleserverchange); | |
83 | registerhook(HOOK_CORE_STATSREQUEST,&nickstats); | |
84 | ||
85 | /* And our server handlers */ | |
86 | registerserverhandler("N",&handlenickmsg,10); | |
87 | registerserverhandler("D",&handlekillmsg,2); | |
88 | registerserverhandler("Q",&handlequitmsg,1); | |
89 | registerserverhandler("M",&handleusermodemsg,3); | |
90 | registerserverhandler("W",&handlewhoismsg,2); | |
47657339 | 91 | registerserverhandler("AC",&handleaccountmsg,4); |
c86edd1d | 92 | registerserverhandler("R",&handlestatsmsg,2); |
6885ae9c | 93 | registerserverhandler("P",&handleprivmsg,2); |
5144ddc4 | 94 | registerserverhandler("A",&handleawaymsg,1); |
c86edd1d Q |
95 | |
96 | /* Fake the addition of our own server */ | |
97 | handleserverchange(HOOK_SERVER_NEWSERVER,(void *)numerictolong(mynumeric->content,2)); | |
98 | } | |
99 | ||
103521a1 | 100 | void _fini() { |
9cf0b03f CP |
101 | nick *np; |
102 | int i; | |
103 | ||
707c5824 | 104 | fininickhelpers(); |
9cf0b03f CP |
105 | |
106 | for (i=0;i<NICKHASHSIZE;i++) { | |
107 | for (np=nicktable[i];np;np=np->next) { | |
108 | freesstring(np->shident); | |
109 | freesstring(np->sethost); | |
843184e3 | 110 | freesstring(np->opername); |
3404a8f0 | 111 | if(!np->auth && np->authname && (np->authname != NULLAUTHNAME)) |
3294b10b | 112 | free(np->authname); |
9cf0b03f CP |
113 | } |
114 | } | |
115 | ||
df5ab174 | 116 | nsfreeall(POOL_NICK); |
707c5824 | 117 | |
103521a1 | 118 | /* Free the hooks */ |
119 | deregisterhook(HOOK_SERVER_NEWSERVER,&handleserverchange); | |
120 | deregisterhook(HOOK_SERVER_LOSTSERVER,&handleserverchange); | |
121 | deregisterhook(HOOK_CORE_STATSREQUEST,&nickstats); | |
122 | ||
123 | /* And our server handlers */ | |
124 | deregisterserverhandler("N",&handlenickmsg); | |
125 | deregisterserverhandler("D",&handlekillmsg); | |
126 | deregisterserverhandler("Q",&handlequitmsg); | |
127 | deregisterserverhandler("M",&handleusermodemsg); | |
128 | deregisterserverhandler("W",&handlewhoismsg); | |
129 | deregisterserverhandler("AC",&handleaccountmsg); | |
130 | deregisterserverhandler("R",&handlestatsmsg); | |
6885ae9c | 131 | deregisterserverhandler("P",&handleprivmsg); |
5144ddc4 | 132 | deregisterserverhandler("A",&handleawaymsg); |
103521a1 | 133 | } |
134 | ||
c86edd1d Q |
135 | /* |
136 | * This function handles servers appearing and disappearing. | |
137 | * For a new server, the client table is allocated. | |
138 | * For a disappearing server, all it's clients are killed and the client table is freed. | |
139 | */ | |
140 | ||
141 | void handleserverchange(int hooknum, void *arg) { | |
c3db6f7e | 142 | long servernum; |
c86edd1d Q |
143 | int i; |
144 | ||
c3db6f7e | 145 | servernum=(long)arg; |
c86edd1d Q |
146 | |
147 | switch(hooknum) { | |
148 | case HOOK_SERVER_NEWSERVER: | |
103521a1 | 149 | servernicks[servernum]=(nick **)nsmalloc(POOL_NICK,(serverlist[servernum].maxusernum+1)*sizeof(nick **)); |
c86edd1d Q |
150 | memset(servernicks[servernum],0,(serverlist[servernum].maxusernum+1)*sizeof(nick **)); |
151 | break; | |
152 | ||
153 | case HOOK_SERVER_LOSTSERVER: | |
154 | for (i=0;i<=serverlist[servernum].maxusernum;i++) { | |
155 | if (servernicks[servernum][i]!=NULL) { | |
156 | deletenick(servernicks[servernum][i]); | |
157 | } | |
158 | } | |
2a010087 | 159 | nsfree(POOL_NICK,servernicks[servernum]); |
c86edd1d Q |
160 | break; |
161 | } | |
162 | } | |
163 | ||
164 | /* | |
165 | * deletenick: | |
166 | * | |
167 | * This function handles the removal of a nick from the network | |
168 | */ | |
169 | ||
170 | void deletenick(nick *np) { | |
171 | nick **nh; | |
172 | ||
173 | /* Fire the hook. This will deal with removal from channels etc. */ | |
174 | triggerhook(HOOK_NICK_LOSTNICK, np); | |
175 | ||
176 | /* Release the realname and hostname parts */ | |
177 | ||
178 | for (nh=&(np->realname->nicks);*nh;nh=&((*nh)->nextbyrealname)) { | |
179 | if (*nh==np) { | |
180 | *nh=np->nextbyrealname; | |
181 | break; | |
182 | } | |
183 | } | |
184 | ||
185 | for (nh=&(np->host->nicks);*nh;nh=&((*nh)->nextbyhost)) { | |
186 | if (*nh==np) { | |
187 | *nh=np->nextbyhost; | |
188 | break; | |
189 | } | |
190 | } | |
191 | ||
192 | releaserealname(np->realname); | |
193 | releasehost(np->host); | |
194 | ||
3294b10b CP |
195 | if(IsAccount(np)) { |
196 | if(!np->auth) { | |
3404a8f0 | 197 | if(np->authname && (np->authname != NULLAUTHNAME)) |
3294b10b CP |
198 | free(np->authname); |
199 | } else { | |
200 | np->auth->usercount--; | |
47657339 | 201 | |
3294b10b CP |
202 | for (nh=&(np->auth->nicks);*nh;nh=&((*nh)->nextbyauthname)) { |
203 | if (*nh==np) { | |
204 | *nh=np->nextbyauthname; | |
205 | break; | |
206 | } | |
47657339 | 207 | } |
47657339 | 208 | |
3294b10b CP |
209 | releaseauthname(np->auth); |
210 | } | |
47657339 C |
211 | } |
212 | ||
c86edd1d Q |
213 | freesstring(np->shident); /* freesstring(NULL) is OK */ |
214 | freesstring(np->sethost); | |
843184e3 | 215 | freesstring(np->opername); |
c86edd1d | 216 | |
96644df6 | 217 | node_decrement_usercount(np->ipnode); |
526e7c1d P |
218 | derefnode(iptree, np->ipnode); |
219 | ||
220 | /* TODO: figure out how to cleanly remove nodes without affecting other modules */ | |
221 | ||
c86edd1d Q |
222 | /* Delete the nick from the servernick table */ |
223 | *(gethandlebynumericunsafe(np->numeric))=NULL; | |
224 | ||
225 | /* Remove the nick from the hash table */ | |
226 | removenickfromhash(np); | |
227 | ||
228 | freenick(np); | |
229 | } | |
230 | ||
231 | void addnicktohash(nick *np) { | |
232 | np->next=nicktable[nickhash(np->nick)]; | |
233 | nicktable[nickhash(np->nick)]=np; | |
234 | } | |
235 | ||
236 | void removenickfromhash(nick *np) { | |
237 | nick **nh; | |
238 | ||
239 | for (nh=&(nicktable[nickhash(np->nick)]);*nh;nh=&((*nh)->next)) { | |
240 | if ((*nh)==np) { | |
241 | (*nh)=np->next; | |
242 | break; | |
243 | } | |
244 | } | |
245 | } | |
246 | ||
247 | nick *getnickbynick(const char *name) { | |
248 | nick *np; | |
249 | ||
250 | for (np=nicktable[nickhash(name)];np;np=np->next) { | |
251 | if (!ircd_strcmp(np->nick,name)) | |
252 | return np; | |
253 | } | |
254 | ||
255 | return NULL; | |
256 | } | |
257 | ||
258 | void nickstats(int hooknum, void *arg) { | |
259 | int total,maxchain,curchain,i,buckets; | |
260 | nick *np; | |
261 | char buf[200]; | |
262 | ||
263 | /* Get nick stats */ | |
264 | buckets=total=maxchain=curchain=0; | |
265 | for (i=0;i<NICKHASHSIZE;i++,curchain=0) { | |
266 | np=nicktable[i]; | |
267 | if (np!=NULL) { | |
268 | buckets++; | |
269 | for (;np;np=np->next) { | |
270 | total++; | |
271 | curchain++; | |
272 | } | |
273 | } | |
274 | if (curchain>maxchain) { | |
275 | maxchain=curchain; | |
276 | } | |
277 | } | |
278 | ||
c3db6f7e | 279 | if ((long)arg>5) { |
c86edd1d Q |
280 | /* Full stats */ |
281 | sprintf(buf,"Nick : %6d nicks (HASH: %6d/%6d, chain %3d)",total,buckets,NICKHASHSIZE,maxchain); | |
c3db6f7e | 282 | } else if ((long)arg>2) { |
c86edd1d Q |
283 | sprintf(buf,"Nick : %6d users on network.",total); |
284 | } | |
285 | ||
c3db6f7e | 286 | if ((long)arg>2) { |
c86edd1d Q |
287 | triggerhook(HOOK_CORE_STATSREPLY,buf); |
288 | } | |
289 | } | |
290 | ||
291 | int registernickext(const char *name) { | |
292 | int i; | |
293 | ||
294 | if (findnickext(name)!=-1) { | |
295 | Error("nick",ERR_WARNING,"Tried to register duplicate nick extension %s",name); | |
296 | return -1; | |
297 | } | |
298 | ||
299 | for (i=0;i<MAXNICKEXTS;i++) { | |
300 | if (nickextnames[i]==NULL) { | |
301 | nickextnames[i]=getsstring(name,100); | |
302 | return i; | |
303 | } | |
304 | } | |
305 | ||
47657339 | 306 | Error("nick",ERR_WARNING,"Tried to register too many nick extensions: %s",name); |
c86edd1d Q |
307 | return -1; |
308 | } | |
309 | ||
310 | int findnickext(const char *name) { | |
311 | int i; | |
312 | ||
313 | for (i=0;i<MAXNICKEXTS;i++) { | |
314 | if (nickextnames[i]!=NULL && !ircd_strcmp(name,nickextnames[i]->content)) { | |
315 | return i; | |
316 | } | |
317 | } | |
318 | ||
319 | return -1; | |
320 | } | |
321 | ||
322 | void releasenickext(int index) { | |
323 | int i; | |
324 | nick *np; | |
325 | ||
326 | freesstring(nickextnames[index]); | |
327 | nickextnames[index]=NULL; | |
328 | ||
329 | for (i=0;i<NICKHASHSIZE;i++) { | |
330 | for (np=nicktable[i];np;np=np->next) { | |
331 | np->exts[index]=NULL; | |
332 | } | |
333 | } | |
334 | } | |
335 | ||
336 | /* visiblehostmask | |
337 | * Produces the "apparent" hostmask as seen by network users. | |
338 | */ | |
339 | ||
340 | char *visiblehostmask(nick *np, char *buf) { | |
28252fef | 341 | char uhbuf[USERLEN+HOSTLEN+2]; |
342 | ||
343 | visibleuserhost(np, uhbuf); | |
344 | sprintf(buf,"%s!%s",np->nick,uhbuf); | |
345 | ||
346 | return buf; | |
347 | } | |
348 | ||
349 | /* visibleuserhost | |
350 | * As above without nick | |
351 | */ | |
352 | ||
353 | char *visibleuserhost(nick *np, char *buf) { | |
c86edd1d Q |
354 | char hostbuf[HOSTLEN+1]; |
355 | char *ident, *host; | |
356 | ||
357 | ident=np->ident; | |
358 | host=np->host->name->content; | |
359 | ||
360 | if (IsSetHost(np)) { | |
361 | if (np->shident) { | |
362 | ident=np->shident->content; | |
363 | } | |
364 | if (np->sethost) { | |
365 | host=np->sethost->content; | |
366 | } | |
367 | } else if (IsAccount(np) && IsHideHost(np)) { | |
368 | sprintf(hostbuf,"%s.%s", np->authname, HIS_HIDDENHOST); | |
369 | host=hostbuf; | |
370 | } | |
371 | ||
28252fef | 372 | sprintf(buf,"%s@%s",ident,host); |
c86edd1d Q |
373 | |
374 | return buf; | |
375 | } | |
376 | ||
377 | #if 0 | |
378 | ||
379 | /* | |
380 | * gethandlebynumeric: | |
381 | * Given a numeric, gives the location in the servernicks table | |
382 | * where it should be. Does not check that the nick currently found | |
383 | * there (if any) has the correct numeric; this is left to the | |
384 | * calling function to figure out. | |
385 | */ | |
386 | ||
387 | nick **gethandlebynumeric(long numeric) { | |
388 | int servernum; | |
389 | int maskednum; | |
390 | server *serv; | |
391 | ||
392 | /* Shift off the client identifier part of the numeric to get the server ID */ | |
393 | servernum=(numeric>>18); | |
394 | ||
395 | if ((serv=getserverdata(servernum))==NULL) { | |
396 | Error("nick",ERR_WARNING,"Numeric %ld refers to non-existent server %d",numeric,servernum); | |
397 | return NULL; | |
398 | } | |
399 | ||
400 | /* Compute the masked numeric */ | |
401 | maskednum=numeric&(serv->maxusernum); | |
402 | ||
403 | return (servernicks[servernum])+maskednum; | |
404 | } | |
405 | ||
406 | /* | |
407 | * getnickbynumeric[str]() | |
408 | * These functions retrieve a nick based on it's numeric on the network | |
409 | * Use the approriate function depending on how your numeric is expressed.. | |
410 | */ | |
411 | ||
412 | nick *getnickbynumeric(long numeric) { | |
413 | nick **nh; | |
414 | ||
415 | nh=gethandlebynumeric(numeric); | |
416 | ||
417 | if ((*nh) && ((*nh)->numeric!=numeric)) { | |
418 | /* We found a masked numeric match, but the actual numeric | |
419 | * is different. This counts as a miss. */ | |
420 | return NULL; | |
421 | } | |
422 | ||
423 | return (*nh); | |
424 | } | |
425 | ||
426 | nick *getnickbynumericstr(char *numericstr) { | |
427 | return getnickbynumeric(numerictolong(numericstr,5)); | |
428 | } | |
429 | ||
430 | #endif | |
526e7c1d | 431 |