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1 | /* nickhandlers.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" | |
14 | #include <stdlib.h> | |
15 | #include <string.h> | |
16 | #include <stdint.h> | |
17 | ||
18 | /* | |
19 | * handlenickmsg: | |
20 | * Handle new nicks being introduced to the network. | |
21 | * Handle renames. | |
22 | */ | |
23 | ||
24 | int handlenickmsg(void *source, int cargc, char **cargv) { | |
25 | char *sender=(char *)source; | |
26 | time_t timestamp; | |
27 | nick *np,*np2; | |
28 | nick **nh; | |
29 | char *fakehost; | |
30 | char *accountts; | |
31 | char *accountflags; | |
32 | struct irc_in_addr ipaddress, ipaddress_canonical; | |
33 | char *accountid; | |
34 | unsigned long userid; | |
35 | ||
36 | if (cargc==2) { /* rename */ | |
37 | char oldnick[NICKLEN+1]; | |
38 | void *harg[2]; | |
39 | ||
40 | /* Nyklon 1017697578 */ | |
41 | timestamp=strtol(cargv[1],NULL,10); | |
42 | np=getnickbynumericstr(sender); | |
43 | if (np==NULL) { | |
44 | Error("nick",ERR_ERROR,"Rename from non-existent sender %s",sender); | |
45 | return CMD_OK; | |
46 | } | |
47 | ||
48 | strncpy(oldnick,np->nick,NICKLEN); | |
49 | oldnick[NICKLEN]='\0'; | |
50 | harg[0]=(void *)np; | |
51 | harg[1]=(void *)oldnick; | |
52 | ||
53 | np2=getnickbynick(cargv[0]); | |
54 | if (np==np2) { | |
55 | /* The new and old nickname have the same hash, this means a rename to the same name in | |
56 | * different case, e.g. Flash -> flash. In this case the timestamp for the change should | |
57 | * match the existing timestamp, and we can bypass all the collision checking and hash fettling. */ | |
58 | if (np->timestamp!=timestamp) { | |
59 | Error("nick",ERR_WARNING,"Rename to same nickname with different timestamp (%s(%jd) -> %s(%jd))", | |
60 | np->nick,(intmax_t)np->timestamp,cargv[0], (intmax_t)timestamp); | |
61 | np->timestamp=timestamp; | |
62 | } | |
63 | strncpy(np->nick,cargv[0],NICKLEN); | |
64 | np->nick[NICKLEN]='\0'; | |
65 | triggerhook(HOOK_NICK_RENAME,harg); | |
66 | return CMD_OK; | |
67 | } | |
68 | if (np2!=NULL) { | |
69 | /* Nick collision */ | |
70 | if (ircd_strcmp(np->ident,np2->ident) || (np->host!=np2->host)) { | |
71 | /* Different user@host */ | |
72 | if (np2->timestamp < timestamp) { | |
73 | /* The nick attempting to rename got killed. Guess we don't need to do the rename now :) */ | |
74 | deletenick(np); | |
75 | return CMD_OK; | |
76 | } else { | |
77 | /* The other nick got killed */ | |
78 | deletenick(np2); | |
79 | } | |
80 | } else { | |
81 | if (np2->timestamp < timestamp) { | |
82 | /* Same user@host: reverse logic. Whose idea was all this anyway? */ | |
83 | deletenick(np2); | |
84 | } else { | |
85 | deletenick(np); | |
86 | return CMD_OK; | |
87 | } | |
88 | } | |
89 | } | |
90 | /* OK, we've survived the collision hazard. Change timestamp and rename */ | |
91 | np->timestamp=timestamp; | |
92 | removenickfromhash(np); | |
93 | strncpy(np->nick,cargv[0],NICKLEN); | |
94 | np->nick[NICKLEN]='\0'; | |
95 | addnicktohash(np); | |
96 | triggerhook(HOOK_NICK_RENAME,harg); | |
97 | } else if (cargc>=8) { /* new nick */ | |
98 | /* Jupiler 2 1016645147 ~Jupiler www.iglobal.be +ir moo [FUTURE CRAP HERE] DV74O] BNBd7 :Jupiler */ | |
99 | timestamp=strtol(cargv[2],NULL,10); | |
100 | np=getnickbynick(cargv[0]); | |
101 | if (np!=NULL) { | |
102 | /* Nick collision */ | |
103 | if (ircd_strcmp(np->ident,cargv[3]) || ircd_strcmp(np->host->name->content,cargv[4])) { | |
104 | /* Different user@host */ | |
105 | if (timestamp>np->timestamp) { | |
106 | /* New nick is newer. Ignore this nick message */ | |
107 | return CMD_OK; | |
108 | } else { | |
109 | /* New nick is older. Kill the imposter, and drop through */ | |
110 | deletenick(np); | |
111 | } | |
112 | } else { | |
113 | if (timestamp>np->timestamp) { | |
114 | /* Same user@host, newer timestamp: we're killing off a ghost */ | |
115 | deletenick(np); | |
116 | } else { | |
117 | /* This nick is the ghost, so ignore it */ | |
118 | return CMD_OK; | |
119 | } | |
120 | } | |
121 | } | |
122 | ||
123 | nh=gethandlebynumeric(numerictolong(cargv[cargc-2],5)); | |
124 | if (!nh) { | |
125 | /* This isn't a valid numeric */ | |
126 | Error("nick",ERR_WARNING,"Received NICK with invalid numeric %s from %s.",cargv[cargc-2],sender); | |
127 | return CMD_ERROR; | |
128 | } | |
129 | ||
130 | base64toip(cargv[cargc-3], &ipaddress); | |
131 | ||
132 | /* At this stage the nick is cleared to proceed */ | |
133 | np=newnick(); | |
134 | strncpy(np->nick,cargv[0],NICKLEN); | |
135 | np->nick[NICKLEN]='\0'; | |
136 | np->numeric=numerictolong(cargv[cargc-2],5); | |
137 | strncpy(np->ident,cargv[3],USERLEN); | |
138 | np->ident[USERLEN]='\0'; | |
139 | np->host=findorcreatehost(cargv[4]); | |
140 | np->realname=findorcreaterealname(cargv[cargc-1]); | |
141 | np->nextbyhost=np->host->nicks; | |
142 | np->host->nicks=np; | |
143 | np->nextbyrealname=np->realname->nicks; | |
144 | np->realname->nicks=np; | |
145 | np->timestamp=timestamp; | |
146 | ||
147 | memcpy(&(np->ipaddress), &ipaddress, sizeof(ipaddress)); | |
148 | ||
149 | ip_canonicalize_tunnel(&ipaddress_canonical, &ipaddress); | |
150 | np->ipnode = refnode(iptree, &ipaddress_canonical, PATRICIA_MAXBITS); | |
151 | node_increment_usercount(np->ipnode); | |
152 | ||
153 | np->away=NULL; | |
154 | np->shident=NULL; | |
155 | np->sethost=NULL; | |
156 | np->opername=NULL; | |
157 | np->umodes=0; | |
158 | np->marker=0; | |
159 | memset(np->exts, 0, MAXNICKEXTS * sizeof(void *)); | |
160 | np->authname=NULLAUTHNAME; | |
161 | np->auth=NULL; | |
162 | np->accountts=0; | |
163 | np->cloak_count = 0; | |
164 | np->cloak_extra = NULL; | |
165 | np->message = NULL; | |
166 | if(cargc>=9) { | |
167 | int sethostarg = 6, opernamearg = 6, accountarg = 6; | |
168 | ||
169 | setflags(&(np->umodes),UMODE_ALL,cargv[5],umodeflags,REJECT_NONE); | |
170 | ||
171 | if(IsOper(np) && (serverlist[myhub].flags & SMODE_OPERNAME)) { | |
172 | accountarg++; | |
173 | sethostarg++; | |
174 | ||
175 | np->opername=getsstring(cargv[opernamearg],ACCOUNTLEN); | |
176 | } | |
177 | ||
178 | if (IsAccount(np)) { | |
179 | sethostarg++; | |
180 | ||
181 | if ((accountts=strchr(cargv[accountarg],':'))) { | |
182 | userid=0; | |
183 | *accountts++='\0'; | |
184 | np->accountts=strtoul(accountts,&accountid,10); | |
185 | if(accountid) { | |
186 | userid=strtoul(accountid + 1,&accountflags,10); | |
187 | if(userid) { | |
188 | np->auth=findorcreateauthname(userid, cargv[accountarg]); | |
189 | np->authname=np->auth->name; | |
190 | np->auth->usercount++; | |
191 | np->nextbyauthname=np->auth->nicks; | |
192 | np->auth->nicks=np; | |
193 | if(accountflags) | |
194 | np->auth->flags=strtoull(accountflags + 1,NULL,10); | |
195 | } | |
196 | } | |
197 | if(!userid) { | |
198 | np->authname=malloc(strlen(cargv[accountarg]) + 1); | |
199 | strcpy(np->authname,cargv[accountarg]); | |
200 | } | |
201 | } | |
202 | } | |
203 | if (IsSetHost(np) && (fakehost=strchr(cargv[sethostarg],'@'))) { | |
204 | /* valid sethost */ | |
205 | *fakehost++='\0'; | |
206 | np->shident=getsstring(cargv[sethostarg],USERLEN); | |
207 | np->sethost=getsstring(fakehost,HOSTLEN); | |
208 | } | |
209 | } | |
210 | ||
211 | /* Place this nick in the server nick table. Note that nh is valid from the numeric check above */ | |
212 | if (*nh) { | |
213 | /* There was a nick there already -- we have a masked numeric collision | |
214 | * This shouldn't happen, but if it does the newer nick takes precedence | |
215 | * (the two nicks are from the same server, and if the server has reissued | |
216 | * the masked numeric it must believe the old user no longer exists). | |
217 | */ | |
218 | Error("nick",ERR_ERROR,"Masked numeric collision for %s [%s vs %s]",cargv[0],cargv[cargc-2],longtonumeric((*nh)->numeric,5)); | |
219 | deletenick(*nh); | |
220 | } | |
221 | *nh=np; | |
222 | ||
223 | /* And the nick hash table */ | |
224 | addnicktohash(np); | |
225 | ||
226 | /* Trigger the hook */ | |
227 | triggerhook(HOOK_NICK_NEWNICK,np); | |
228 | } else { | |
229 | Error("nick",ERR_WARNING,"Nick message with weird number of parameters (%d)",cargc); | |
230 | } | |
231 | ||
232 | return CMD_OK; | |
233 | } | |
234 | ||
235 | int handlequitmsg(void *source, int cargc, char **cargv) { | |
236 | nick *np; | |
237 | void *harg[2]; | |
238 | ||
239 | if (cargc>0) { | |
240 | harg[1]=(void *)cargv[0]; | |
241 | } else { | |
242 | harg[1]=""; | |
243 | } | |
244 | ||
245 | np=getnickbynumericstr((char *)source); | |
246 | if (np) { | |
247 | harg[0]=(void *)np; | |
248 | triggerhook(HOOK_NICK_QUIT, harg); | |
249 | deletenick(np); | |
250 | } else { | |
251 | Error("nick",ERR_WARNING,"Quit from non-existant numeric %s",(char *)source); | |
252 | } | |
253 | return CMD_OK; | |
254 | } | |
255 | ||
256 | int handlekillmsg(void *source, int cargc, char **cargv) { | |
257 | nick *np; | |
258 | void *harg[2]; | |
259 | #warning Fix me to use source | |
260 | ||
261 | if (cargc<1) { | |
262 | Error("nick",ERR_WARNING,"Kill message with too few parameters"); | |
263 | return CMD_ERROR; | |
264 | } | |
265 | ||
266 | if (cargc>1) { | |
267 | harg[1]=(void *)cargv[1]; | |
268 | } else { | |
269 | harg[1]=""; | |
270 | } | |
271 | ||
272 | np=getnickbynumericstr(cargv[0]); | |
273 | if (np) { | |
274 | harg[0]=(void *)np; | |
275 | triggerhook(HOOK_NICK_KILL, harg); | |
276 | deletenick(np); | |
277 | } else { | |
278 | Error("nick",ERR_WARNING,"Kill for non-existant numeric %s",cargv[0]); | |
279 | } | |
280 | return CMD_OK; | |
281 | } | |
282 | ||
283 | int handleusermodemsg(void *source, int cargc, char **cargv) { | |
284 | nick *np; | |
285 | flag_t oldflags; | |
286 | char *fakehost; | |
287 | void *args[2]; | |
288 | ||
289 | if (cargc<2) { | |
290 | Error("nick",ERR_WARNING,"Mode message with too few parameters"); | |
291 | return CMD_LAST; /* With <2 params the channels module won't want it either */ | |
292 | } | |
293 | ||
294 | if (cargv[0][0]=='#') { | |
295 | /* Channel mode change, we don't care. | |
296 | * We don't bother checking for other channel types here, since & channel mode | |
297 | * changes aren't broadcast and + channels don't have mode changes :) */ | |
298 | return CMD_OK; | |
299 | } | |
300 | ||
301 | np=getnickbynumericstr((char *)source); | |
302 | if (np!=NULL) { | |
303 | if (ircd_strcmp(cargv[0],np->nick)) { | |
304 | Error("nick",ERR_WARNING,"Attempted mode change on user %s by %s",cargv[0],np->nick); | |
305 | return CMD_OK; | |
306 | } | |
307 | oldflags=np->umodes; | |
308 | setflags(&(np->umodes),UMODE_ALL,cargv[1],umodeflags,REJECT_NONE); | |
309 | ||
310 | args[0] = np; | |
311 | args[1] = (void *)oldflags; | |
312 | triggerhook(HOOK_NICK_MODECHANGE, args); | |
313 | ||
314 | if (strchr(cargv[1],'o')) { /* o always comes on its own when being set */ | |
315 | if(serverlist[myhub].flags & SMODE_OPERNAME) { | |
316 | if((np->umodes & UMODE_OPER)) { | |
317 | np->opername = getsstring(cargv[2], ACCOUNTLEN); | |
318 | } else { | |
319 | freesstring(np->opername); | |
320 | np->opername = NULL; | |
321 | } | |
322 | } | |
323 | if((np->umodes ^ oldflags) & UMODE_OPER) | |
324 | triggerhook(HOOK_NICK_MODEOPER,np); | |
325 | } | |
326 | if (strchr(cargv[1],'h')) { /* Have to allow +h twice.. */ | |
327 | /* +-h: just the freesstring() calls for the -h case */ | |
328 | freesstring(np->shident); /* freesstring(NULL) is OK */ | |
329 | freesstring(np->sethost); | |
330 | np->shident=NULL; | |
331 | np->sethost=NULL; | |
332 | if (IsSetHost(np) && cargc>2) { /* +h and mask received */ | |
333 | if ((fakehost=strchr(cargv[2],'@'))) { | |
334 | /* user@host change */ | |
335 | *fakehost++='\0'; | |
336 | np->shident=getsstring(cargv[2],USERLEN); | |
337 | np->sethost=getsstring(fakehost,HOSTLEN); | |
338 | } else { | |
339 | np->sethost=getsstring(cargv[2],HOSTLEN); | |
340 | } | |
341 | } | |
342 | triggerhook(HOOK_NICK_SETHOST, (void *)np); | |
343 | } | |
344 | } else { | |
345 | Error("nick",ERR_WARNING,"Usermode change by unknown user %s",(char *)source); | |
346 | } | |
347 | return CMD_OK; | |
348 | } | |
349 | ||
350 | int handleaccountmsg(void *source, int cargc, char **cargv) { | |
351 | nick *target; | |
352 | unsigned long userid; | |
353 | time_t accountts; | |
354 | u_int64_t accountflags=0, oldflags; | |
355 | ||
356 | if (cargc<4) { | |
357 | return CMD_OK; | |
358 | } | |
359 | ||
360 | if ((target=getnickbynumericstr(cargv[0]))==NULL) { | |
361 | return CMD_OK; | |
362 | } | |
363 | ||
364 | accountts=strtoul(cargv[2],NULL,10); | |
365 | userid=strtoul(cargv[3],NULL,10); | |
366 | if(cargc>=5) | |
367 | accountflags=strtoull(cargv[4],NULL,10); | |
368 | ||
369 | /* allow user flags to change if all fields match */ | |
370 | if (IsAccount(target)) { | |
371 | void *arg[2]; | |
372 | ||
373 | if (!target->auth || strcmp(target->auth->name,cargv[1]) || (target->auth->userid != userid) || (target->accountts != accountts)) { | |
374 | return CMD_OK; | |
375 | } | |
376 | ||
377 | oldflags = target->auth->flags; | |
378 | arg[0] = target->auth; | |
379 | arg[1] = &oldflags; | |
380 | ||
381 | if (cargc>=5) | |
382 | target->auth->flags=accountflags; | |
383 | ||
384 | triggerhook(HOOK_AUTH_FLAGSUPDATED, (void *)arg); | |
385 | ||
386 | return CMD_OK; | |
387 | } | |
388 | ||
389 | SetAccount(target); | |
390 | target->accountts=accountts; | |
391 | ||
392 | if(!userid) { | |
393 | target->auth=NULL; | |
394 | target->authname=malloc(strlen(cargv[1]) + 1); | |
395 | strcpy(target->authname,cargv[1]); | |
396 | } else { | |
397 | target->auth=findorcreateauthname(userid, cargv[1]); | |
398 | target->auth->usercount++; | |
399 | target->authname=target->auth->name; | |
400 | target->nextbyauthname = target->auth->nicks; | |
401 | target->auth->nicks = target; | |
402 | if (cargc>=5) | |
403 | target->auth->flags=accountflags; | |
404 | } | |
405 | ||
406 | triggerhook(HOOK_NICK_ACCOUNT, (void *)target); | |
407 | ||
408 | return CMD_OK; | |
409 | } | |
410 | ||
411 | int handleprivmsg(void *source, int cargc, char **cargv) { | |
412 | nick *sender; | |
413 | void *args[3]; | |
414 | ||
415 | if (cargc<2) | |
416 | return CMD_OK; | |
417 | ||
418 | if (cargv[0][0]!='$') | |
419 | return CMD_OK; | |
420 | ||
421 | sender=getnickbynumericstr((char *)source); | |
422 | ||
423 | if (!match2strings(cargv[0] + 1,myserver->content)) | |
424 | return CMD_OK; | |
425 | ||
426 | args[0]=sender; | |
427 | args[1]=cargv[0]; | |
428 | args[2]=cargv[1]; | |
429 | ||
430 | triggerhook(HOOK_NICK_MASKPRIVMSG, (void *)args); | |
431 | ||
432 | return CMD_OK; | |
433 | } | |
434 | ||
435 | int handleawaymsg(void *source, int cargc, char **cargv) { | |
436 | nick *sender; | |
437 | ||
438 | /* Check source is a valid user */ | |
439 | if (!(sender=getnickbynumericstr(source))) { | |
440 | return CMD_OK; | |
441 | } | |
442 | ||
443 | /* Done with the old away message either way */ | |
444 | freesstring(sender->away); | |
445 | sender->away=NULL; | |
446 | ||
447 | /* If we have an arg and it isn't an empty string, this sets a new message */ | |
448 | if (cargc > 0 && *(cargv[0])) { | |
449 | sender->away=getsstring(cargv[0], AWAYLEN); | |
450 | } | |
451 | ||
452 | return CMD_OK; | |
453 | } | |
454 | ||
455 | int handleaddcloak(void *source, int cargc, char **cargv) { | |
456 | nick *sender, *target; | |
457 | ||
458 | /* Check source is a valid user */ | |
459 | if (!(sender=getnickbynumericstr(source))) { | |
460 | return CMD_OK; | |
461 | } | |
462 | ||
463 | if (cargc < 1) | |
464 | return CMD_OK; | |
465 | ||
466 | if (!(target=getnickbynumericstr(cargv[0]))) { | |
467 | return CMD_OK; | |
468 | } | |
469 | ||
470 | addcloaktarget(sender, target); | |
471 | ||
472 | return CMD_OK; | |
473 | } | |
474 | ||
475 | int handleclearcloak(void *source, int cargc, char **cargv) { | |
476 | nick *sender; | |
477 | ||
478 | /* Check source is a valid user */ | |
479 | if (!(sender=getnickbynumericstr(source))) { | |
480 | return CMD_OK; | |
481 | } | |
482 | ||
483 | clearcloaktargets(sender); | |
484 | ||
485 | return CMD_OK; | |
486 | } | |
487 |