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