]>
Commit | Line | Data |
---|---|---|
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 | if(cargc>=9) { | |
166 | int sethostarg = 6, opernamearg = 6, accountarg = 6; | |
167 | ||
168 | setflags(&(np->umodes),UMODE_ALL,cargv[5],umodeflags,REJECT_NONE); | |
169 | ||
170 | if(IsOper(np) && (serverlist[myhub].flags & SMODE_OPERNAME)) { | |
171 | accountarg++; | |
172 | sethostarg++; | |
173 | ||
174 | np->opername=getsstring(cargv[opernamearg],ACCOUNTLEN); | |
175 | } | |
176 | ||
177 | if (IsAccount(np)) { | |
178 | sethostarg++; | |
179 | ||
180 | if ((accountts=strchr(cargv[accountarg],':'))) { | |
181 | userid=0; | |
182 | *accountts++='\0'; | |
183 | np->accountts=strtoul(accountts,&accountid,10); | |
184 | if(accountid) { | |
185 | userid=strtoul(accountid + 1,&accountflags,10); | |
186 | if(userid) { | |
187 | np->auth=findorcreateauthname(userid, cargv[accountarg]); | |
188 | np->authname=np->auth->name; | |
189 | np->auth->usercount++; | |
190 | np->nextbyauthname=np->auth->nicks; | |
191 | np->auth->nicks=np; | |
192 | if(accountflags) | |
193 | np->auth->flags=strtoull(accountflags + 1,NULL,10); | |
194 | } | |
195 | } | |
196 | if(!userid) { | |
197 | np->authname=malloc(strlen(cargv[accountarg]) + 1); | |
198 | strcpy(np->authname,cargv[accountarg]); | |
199 | } | |
200 | } | |
201 | } | |
202 | if (IsSetHost(np) && (fakehost=strchr(cargv[sethostarg],'@'))) { | |
203 | /* valid sethost */ | |
204 | *fakehost++='\0'; | |
205 | np->shident=getsstring(cargv[sethostarg],USERLEN); | |
206 | np->sethost=getsstring(fakehost,HOSTLEN); | |
207 | } | |
208 | } | |
209 | ||
210 | /* Place this nick in the server nick table. Note that nh is valid from the numeric check above */ | |
211 | if (*nh) { | |
212 | /* There was a nick there already -- we have a masked numeric collision | |
213 | * This shouldn't happen, but if it does the newer nick takes precedence | |
214 | * (the two nicks are from the same server, and if the server has reissued | |
215 | * the masked numeric it must believe the old user no longer exists). | |
216 | */ | |
217 | Error("nick",ERR_ERROR,"Masked numeric collision for %s [%s vs %s]",cargv[0],cargv[cargc-2],longtonumeric((*nh)->numeric,5)); | |
218 | deletenick(*nh); | |
219 | } | |
220 | *nh=np; | |
221 | ||
222 | /* And the nick hash table */ | |
223 | addnicktohash(np); | |
224 | ||
225 | /* Trigger the hook */ | |
226 | triggerhook(HOOK_NICK_NEWNICK,np); | |
227 | } else { | |
228 | Error("nick",ERR_WARNING,"Nick message with weird number of parameters (%d)",cargc); | |
229 | } | |
230 | ||
231 | return CMD_OK; | |
232 | } | |
233 | ||
234 | int handlequitmsg(void *source, int cargc, char **cargv) { | |
235 | nick *np; | |
236 | void *harg[2]; | |
237 | ||
238 | if (cargc>0) { | |
239 | harg[1]=(void *)cargv[0]; | |
240 | } else { | |
241 | harg[1]=""; | |
242 | } | |
243 | ||
244 | np=getnickbynumericstr((char *)source); | |
245 | if (np) { | |
246 | harg[0]=(void *)np; | |
247 | triggerhook(HOOK_NICK_QUIT, harg); | |
248 | deletenick(np); | |
249 | } else { | |
250 | Error("nick",ERR_WARNING,"Quit from non-existant numeric %s",(char *)source); | |
251 | } | |
252 | return CMD_OK; | |
253 | } | |
254 | ||
255 | int handlekillmsg(void *source, int cargc, char **cargv) { | |
256 | nick *np; | |
257 | void *harg[2]; | |
258 | #warning Fix me to use source | |
259 | ||
260 | if (cargc<1) { | |
261 | Error("nick",ERR_WARNING,"Kill message with too few parameters"); | |
262 | return CMD_ERROR; | |
263 | } | |
264 | ||
265 | if (cargc>1) { | |
266 | harg[1]=(void *)cargv[1]; | |
267 | } else { | |
268 | harg[1]=""; | |
269 | } | |
270 | ||
271 | np=getnickbynumericstr(cargv[0]); | |
272 | if (np) { | |
273 | harg[0]=(void *)np; | |
274 | triggerhook(HOOK_NICK_KILL, harg); | |
275 | deletenick(np); | |
276 | } else { | |
277 | Error("nick",ERR_WARNING,"Kill for non-existant numeric %s",cargv[0]); | |
278 | } | |
279 | return CMD_OK; | |
280 | } | |
281 | ||
282 | int handleusermodemsg(void *source, int cargc, char **cargv) { | |
283 | nick *np; | |
284 | flag_t oldflags; | |
285 | char *fakehost; | |
286 | ||
287 | if (cargc<2) { | |
288 | Error("nick",ERR_WARNING,"Mode message with too few parameters"); | |
289 | return CMD_LAST; /* With <2 params the channels module won't want it either */ | |
290 | } | |
291 | ||
292 | if (cargv[0][0]=='#') { | |
293 | /* Channel mode change, we don't care. | |
294 | * We don't bother checking for other channel types here, since & channel mode | |
295 | * changes aren't broadcast and + channels don't have mode changes :) */ | |
296 | return CMD_OK; | |
297 | } | |
298 | ||
299 | np=getnickbynumericstr((char *)source); | |
300 | if (np!=NULL) { | |
301 | if (ircd_strcmp(cargv[0],np->nick)) { | |
302 | Error("nick",ERR_WARNING,"Attempted mode change on user %s by %s",cargv[0],np->nick); | |
303 | return CMD_OK; | |
304 | } | |
305 | oldflags=np->umodes; | |
306 | setflags(&(np->umodes),UMODE_ALL,cargv[1],umodeflags,REJECT_NONE); | |
307 | ||
308 | if (strchr(cargv[1],'o')) { /* o always comes on its own when being set */ | |
309 | if(serverlist[myhub].flags & SMODE_OPERNAME) { | |
310 | if((np->umodes & UMODE_OPER)) { | |
311 | np->opername = getsstring(cargv[2], ACCOUNTLEN); | |
312 | } else { | |
313 | freesstring(np->opername); | |
314 | np->opername = NULL; | |
315 | } | |
316 | } | |
317 | if((np->umodes ^ oldflags) & UMODE_OPER) | |
318 | triggerhook(HOOK_NICK_MODEOPER,np); | |
319 | } | |
320 | if (strchr(cargv[1],'h')) { /* Have to allow +h twice.. */ | |
321 | /* +-h: just the freesstring() calls for the -h case */ | |
322 | freesstring(np->shident); /* freesstring(NULL) is OK */ | |
323 | freesstring(np->sethost); | |
324 | np->shident=NULL; | |
325 | np->sethost=NULL; | |
326 | if (IsSetHost(np) && cargc>2) { /* +h and mask received */ | |
327 | if ((fakehost=strchr(cargv[2],'@'))) { | |
328 | /* user@host change */ | |
329 | *fakehost++='\0'; | |
330 | np->shident=getsstring(cargv[2],USERLEN); | |
331 | np->sethost=getsstring(fakehost,HOSTLEN); | |
332 | } else { | |
333 | np->sethost=getsstring(cargv[2],HOSTLEN); | |
334 | } | |
335 | } | |
336 | triggerhook(HOOK_NICK_SETHOST, (void *)np); | |
337 | } | |
338 | } else { | |
339 | Error("nick",ERR_WARNING,"Usermode change by unknown user %s",(char *)source); | |
340 | } | |
341 | return CMD_OK; | |
342 | } | |
343 | ||
344 | int handleaccountmsg(void *source, int cargc, char **cargv) { | |
345 | nick *target; | |
346 | unsigned long userid; | |
347 | time_t accountts; | |
348 | u_int64_t accountflags=0, oldflags; | |
349 | ||
350 | if (cargc<4) { | |
351 | return CMD_OK; | |
352 | } | |
353 | ||
354 | if ((target=getnickbynumericstr(cargv[0]))==NULL) { | |
355 | return CMD_OK; | |
356 | } | |
357 | ||
358 | accountts=strtoul(cargv[2],NULL,10); | |
359 | userid=strtoul(cargv[3],NULL,10); | |
360 | if(cargc>=5) | |
361 | accountflags=strtoull(cargv[4],NULL,10); | |
362 | ||
363 | /* allow user flags to change if all fields match */ | |
364 | if (IsAccount(target)) { | |
365 | void *arg[2]; | |
366 | ||
367 | if (!target->auth || strcmp(target->auth->name,cargv[1]) || (target->auth->userid != userid) || (target->accountts != accountts)) { | |
368 | return CMD_OK; | |
369 | } | |
370 | ||
371 | oldflags = target->auth->flags; | |
372 | arg[0] = target->auth; | |
373 | arg[1] = &oldflags; | |
374 | ||
375 | if (cargc>=5) | |
376 | target->auth->flags=accountflags; | |
377 | ||
378 | triggerhook(HOOK_AUTH_FLAGSUPDATED, (void *)arg); | |
379 | ||
380 | return CMD_OK; | |
381 | } | |
382 | ||
383 | SetAccount(target); | |
384 | target->accountts=accountts; | |
385 | ||
386 | if(!userid) { | |
387 | target->auth=NULL; | |
388 | target->authname=malloc(strlen(cargv[1]) + 1); | |
389 | strcpy(target->authname,cargv[1]); | |
390 | } else { | |
391 | target->auth=findorcreateauthname(userid, cargv[1]); | |
392 | target->auth->usercount++; | |
393 | target->authname=target->auth->name; | |
394 | target->nextbyauthname = target->auth->nicks; | |
395 | target->auth->nicks = target; | |
396 | if (cargc>=5) | |
397 | target->auth->flags=accountflags; | |
398 | } | |
399 | ||
400 | triggerhook(HOOK_NICK_ACCOUNT, (void *)target); | |
401 | ||
402 | return CMD_OK; | |
403 | } | |
404 | ||
405 | int handleprivmsg(void *source, int cargc, char **cargv) { | |
406 | nick *sender; | |
407 | void *args[3]; | |
408 | ||
409 | if (cargc<2) | |
410 | return CMD_OK; | |
411 | ||
412 | if (cargv[0][0]!='$') | |
413 | return CMD_OK; | |
414 | ||
415 | sender=getnickbynumericstr((char *)source); | |
416 | ||
417 | if (!match2strings(cargv[0] + 1,myserver->content)) | |
418 | return CMD_OK; | |
419 | ||
420 | args[0]=sender; | |
421 | args[1]=cargv[0]; | |
422 | args[2]=cargv[1]; | |
423 | ||
424 | triggerhook(HOOK_NICK_MASKPRIVMSG, (void *)args); | |
425 | ||
426 | return CMD_OK; | |
427 | } | |
428 | ||
429 | int handleawaymsg(void *source, int cargc, char **cargv) { | |
430 | nick *sender; | |
431 | ||
432 | /* Check source is a valid user */ | |
433 | if (!(sender=getnickbynumericstr(source))) { | |
434 | return CMD_OK; | |
435 | } | |
436 | ||
437 | /* Done with the old away message either way */ | |
438 | freesstring(sender->away); | |
439 | sender->away=NULL; | |
440 | ||
441 | /* If we have an arg and it isn't an empty string, this sets a new message */ | |
442 | if (cargc > 0 && *(cargv[0])) { | |
443 | sender->away=getsstring(cargv[0], AWAYLEN); | |
444 | } | |
445 | ||
446 | return CMD_OK; | |
447 | } | |
448 | ||
449 | int handleaddcloak(void *source, int cargc, char **cargv) { | |
450 | nick *sender, *target; | |
451 | ||
452 | /* Check source is a valid user */ | |
453 | if (!(sender=getnickbynumericstr(source))) { | |
454 | return CMD_OK; | |
455 | } | |
456 | ||
457 | if (cargc < 1) | |
458 | return CMD_OK; | |
459 | ||
460 | if (!(target=getnickbynumericstr(cargv[0]))) { | |
461 | return CMD_OK; | |
462 | } | |
463 | ||
464 | addcloaktarget(sender, target); | |
465 | ||
466 | return CMD_OK; | |
467 | } | |
468 | ||
469 | int handleclearcloak(void *source, int cargc, char **cargv) { | |
470 | nick *sender; | |
471 | ||
472 | /* Check source is a valid user */ | |
473 | if (!(sender=getnickbynumericstr(source))) { | |
474 | return CMD_OK; | |
475 | } | |
476 | ||
477 | clearcloaktargets(sender); | |
478 | ||
479 | return CMD_OK; | |
480 | } | |
481 |