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Commit | Line | Data |
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c86edd1d Q |
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> | |
8bab42e7 | 16 | #include <stdint.h> |
c86edd1d Q |
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; | |
c153c0dc | 31 | char *accountflags; |
526e7c1d | 32 | struct irc_in_addr ipaddress; |
47657339 C |
33 | char *accountid; |
34 | unsigned long userid; | |
c86edd1d Q |
35 | |
36 | if (cargc==2) { /* rename */ | |
2fdef282 CP |
37 | char oldnick[NICKLEN+1]; |
38 | void *harg[2]; | |
39 | ||
c86edd1d Q |
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 | } | |
2fdef282 CP |
47 | |
48 | strncpy(oldnick,np->nick,NICKLEN); | |
49 | oldnick[NICKLEN]='\0'; | |
50 | harg[0]=(void *)np; | |
51 | harg[1]=(void *)oldnick; | |
52 | ||
c86edd1d Q |
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) { | |
16739dbe | 59 | Error("nick",ERR_WARNING,"Rename to same nickname with different timestamp (%s(%jd) -> %s(%jd))", |
58a4da4a | 60 | np->nick,(intmax_t)np->timestamp,cargv[0], (intmax_t)timestamp); |
c86edd1d Q |
61 | np->timestamp=timestamp; |
62 | } | |
63 | strncpy(np->nick,cargv[0],NICKLEN); | |
64 | np->nick[NICKLEN]='\0'; | |
2fdef282 | 65 | triggerhook(HOOK_NICK_RENAME,harg); |
c86edd1d Q |
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); | |
2fdef282 | 96 | triggerhook(HOOK_NICK_RENAME,harg); |
c86edd1d Q |
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 | } | |
1a38afd3 P |
129 | |
130 | base64toip(cargv[cargc-3], &ipaddress); | |
131 | if (!irc_in_addr_valid(&ipaddress)) { | |
132 | Error("nick",ERR_ERROR,"Received NICK with invalid ipaddress for %s from %s.",cargv[0],sender); | |
133 | return CMD_ERROR; | |
134 | } | |
135 | ||
c86edd1d Q |
136 | /* At this stage the nick is cleared to proceed */ |
137 | np=newnick(); | |
138 | strncpy(np->nick,cargv[0],NICKLEN); | |
139 | np->nick[NICKLEN]='\0'; | |
140 | np->numeric=numerictolong(cargv[cargc-2],5); | |
141 | strncpy(np->ident,cargv[3],USERLEN); | |
142 | np->ident[USERLEN]='\0'; | |
143 | np->host=findorcreatehost(cargv[4]); | |
144 | np->realname=findorcreaterealname(cargv[cargc-1]); | |
145 | np->nextbyhost=np->host->nicks; | |
146 | np->host->nicks=np; | |
147 | np->nextbyrealname=np->realname->nicks; | |
148 | np->realname->nicks=np; | |
149 | np->timestamp=timestamp; | |
526e7c1d P |
150 | |
151 | base64toip(cargv[cargc-3], &ipaddress); | |
071d403d | 152 | np->ipnode = refnode(iptree, &ipaddress, PATRICIA_MAXBITS); |
96644df6 | 153 | node_increment_usercount(np->ipnode); |
526e7c1d | 154 | |
5144ddc4 | 155 | np->away=NULL; |
c86edd1d Q |
156 | np->shident=NULL; |
157 | np->sethost=NULL; | |
843184e3 | 158 | np->opername=NULL; |
c86edd1d Q |
159 | np->umodes=0; |
160 | np->marker=0; | |
161 | memset(np->exts, 0, MAXNICKEXTS * sizeof(void *)); | |
3404a8f0 | 162 | np->authname=NULLAUTHNAME; |
47657339 | 163 | np->auth=NULL; |
c4ffdb9b | 164 | np->accountts=0; |
42d7af35 GB |
165 | np->cloak_count = 0; |
166 | np->cloak_extra = NULL; | |
c86edd1d | 167 | if(cargc>=9) { |
843184e3 CP |
168 | int sethostarg = 6, opernamearg = 6, accountarg = 6; |
169 | ||
c86edd1d | 170 | setflags(&(np->umodes),UMODE_ALL,cargv[5],umodeflags,REJECT_NONE); |
843184e3 CP |
171 | |
172 | if(IsOper(np) && (serverlist[myhub].flags & SMODE_OPERNAME)) { | |
173 | accountarg++; | |
174 | sethostarg++; | |
175 | ||
176 | np->opername=getsstring(cargv[opernamearg],ACCOUNTLEN); | |
177 | } | |
178 | ||
c86edd1d | 179 | if (IsAccount(np)) { |
843184e3 CP |
180 | sethostarg++; |
181 | ||
182 | if ((accountts=strchr(cargv[accountarg],':'))) { | |
3404a8f0 | 183 | userid=0; |
c86edd1d | 184 | *accountts++='\0'; |
3294b10b | 185 | np->accountts=strtoul(accountts,&accountid,10); |
47657339 | 186 | if(accountid) { |
c153c0dc | 187 | userid=strtoul(accountid + 1,&accountflags,10); |
3294b10b | 188 | if(userid) { |
843184e3 | 189 | np->auth=findorcreateauthname(userid, cargv[accountarg]); |
3294b10b | 190 | np->authname=np->auth->name; |
47657339 C |
191 | np->auth->usercount++; |
192 | np->nextbyauthname=np->auth->nicks; | |
193 | np->auth->nicks=np; | |
0b0fb773 | 194 | if(accountflags) |
92acf9ae | 195 | np->auth->flags=strtoull(accountflags + 1,NULL,10); |
47657339 | 196 | } |
3404a8f0 CP |
197 | } |
198 | if(!userid) { | |
3294b10b CP |
199 | np->authname=malloc(strlen(cargv[accountarg]) + 1); |
200 | strcpy(np->authname,cargv[accountarg]); | |
47657339 | 201 | } |
c86edd1d | 202 | } |
c86edd1d | 203 | } |
843184e3 | 204 | if (IsSetHost(np) && (fakehost=strchr(cargv[sethostarg],'@'))) { |
c86edd1d Q |
205 | /* valid sethost */ |
206 | *fakehost++='\0'; | |
843184e3 | 207 | np->shident=getsstring(cargv[sethostarg],USERLEN); |
c86edd1d Q |
208 | np->sethost=getsstring(fakehost,HOSTLEN); |
209 | } | |
210 | } | |
211 | ||
212 | /* Place this nick in the server nick table. Note that nh is valid from the numeric check above */ | |
213 | if (*nh) { | |
214 | /* There was a nick there already -- we have a masked numeric collision | |
215 | * This shouldn't happen, but if it does the newer nick takes precedence | |
216 | * (the two nicks are from the same server, and if the server has reissued | |
217 | * the masked numeric it must believe the old user no longer exists). | |
218 | */ | |
219 | Error("nick",ERR_ERROR,"Masked numeric collision for %s [%s vs %s]",cargv[0],cargv[cargc-2],longtonumeric((*nh)->numeric,5)); | |
220 | deletenick(*nh); | |
221 | } | |
222 | *nh=np; | |
223 | ||
224 | /* And the nick hash table */ | |
225 | addnicktohash(np); | |
226 | ||
227 | /* Trigger the hook */ | |
228 | triggerhook(HOOK_NICK_NEWNICK,np); | |
229 | } else { | |
230 | Error("nick",ERR_WARNING,"Nick message with weird number of parameters (%d)",cargc); | |
231 | } | |
232 | ||
233 | return CMD_OK; | |
234 | } | |
235 | ||
236 | int handlequitmsg(void *source, int cargc, char **cargv) { | |
237 | nick *np; | |
238 | void *harg[2]; | |
239 | ||
85c382d3 | 240 | if (cargc>0) { |
241 | harg[1]=(void *)cargv[0]; | |
c86edd1d Q |
242 | } else { |
243 | harg[1]=""; | |
244 | } | |
245 | ||
246 | np=getnickbynumericstr((char *)source); | |
247 | if (np) { | |
248 | harg[0]=(void *)np; | |
249 | triggerhook(HOOK_NICK_QUIT, harg); | |
250 | deletenick(np); | |
251 | } else { | |
252 | Error("nick",ERR_WARNING,"Quit from non-existant numeric %s",(char *)source); | |
253 | } | |
254 | return CMD_OK; | |
255 | } | |
256 | ||
257 | int handlekillmsg(void *source, int cargc, char **cargv) { | |
258 | nick *np; | |
acd438c7 | 259 | void *harg[2]; |
e3073692 CP |
260 | #warning Fix me to use source |
261 | ||
c86edd1d Q |
262 | if (cargc<1) { |
263 | Error("nick",ERR_WARNING,"Kill message with too few parameters"); | |
264 | return CMD_ERROR; | |
265 | } | |
acd438c7 CP |
266 | |
267 | if (cargc>1) { | |
268 | harg[1]=(void *)cargv[1]; | |
269 | } else { | |
270 | harg[1]=""; | |
271 | } | |
272 | ||
c86edd1d Q |
273 | np=getnickbynumericstr(cargv[0]); |
274 | if (np) { | |
acd438c7 CP |
275 | harg[0]=(void *)np; |
276 | triggerhook(HOOK_NICK_KILL, harg); | |
c86edd1d Q |
277 | deletenick(np); |
278 | } else { | |
279 | Error("nick",ERR_WARNING,"Kill for non-existant numeric %s",cargv[0]); | |
280 | } | |
281 | return CMD_OK; | |
282 | } | |
283 | ||
284 | int handleusermodemsg(void *source, int cargc, char **cargv) { | |
285 | nick *np; | |
286 | flag_t oldflags; | |
287 | char *fakehost; | |
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); | |
843184e3 CP |
309 | |
310 | if (strchr(cargv[1],'o')) { /* o always comes on its own when being set */ | |
311 | if(serverlist[myhub].flags & SMODE_OPERNAME) { | |
312 | if((np->umodes & UMODE_OPER)) { | |
313 | np->opername = getsstring(cargv[2], ACCOUNTLEN); | |
314 | } else { | |
315 | freesstring(np->opername); | |
1a0e3977 | 316 | np->opername = NULL; |
843184e3 CP |
317 | } |
318 | } | |
319 | if((np->umodes ^ oldflags) & UMODE_OPER) | |
320 | triggerhook(HOOK_NICK_MODEOPER,np); | |
321 | } | |
c86edd1d Q |
322 | if (strchr(cargv[1],'h')) { /* Have to allow +h twice.. */ |
323 | /* +-h: just the freesstring() calls for the -h case */ | |
324 | freesstring(np->shident); /* freesstring(NULL) is OK */ | |
325 | freesstring(np->sethost); | |
326 | np->shident=NULL; | |
327 | np->sethost=NULL; | |
328 | if (IsSetHost(np) && cargc>2) { /* +h and mask received */ | |
329 | if ((fakehost=strchr(cargv[2],'@'))) { | |
330 | /* user@host change */ | |
331 | *fakehost++='\0'; | |
332 | np->shident=getsstring(cargv[2],USERLEN); | |
333 | np->sethost=getsstring(fakehost,HOSTLEN); | |
334 | } else { | |
335 | np->sethost=getsstring(cargv[2],HOSTLEN); | |
336 | } | |
337 | } | |
338 | triggerhook(HOOK_NICK_SETHOST, (void *)np); | |
339 | } | |
340 | } else { | |
341 | Error("nick",ERR_WARNING,"Usermode change by unknown user %s",(char *)source); | |
342 | } | |
343 | return CMD_OK; | |
344 | } | |
345 | ||
c86edd1d Q |
346 | int handleaccountmsg(void *source, int cargc, char **cargv) { |
347 | nick *target; | |
47657339 | 348 | unsigned long userid; |
c4ffdb9b | 349 | time_t accountts; |
6cb1b086 | 350 | u_int64_t accountflags=0, oldflags; |
c4ffdb9b CP |
351 | |
352 | if (cargc<4) { | |
c86edd1d Q |
353 | return CMD_OK; |
354 | } | |
355 | ||
356 | if ((target=getnickbynumericstr(cargv[0]))==NULL) { | |
357 | return CMD_OK; | |
358 | } | |
359 | ||
c4ffdb9b CP |
360 | accountts=strtoul(cargv[2],NULL,10); |
361 | userid=strtoul(cargv[3],NULL,10); | |
3294b10b | 362 | if(cargc>=5) |
92acf9ae | 363 | accountflags=strtoull(cargv[4],NULL,10); |
c4ffdb9b CP |
364 | |
365 | /* allow user flags to change if all fields match */ | |
c86edd1d | 366 | if (IsAccount(target)) { |
c4ffdb9b CP |
367 | void *arg[2]; |
368 | ||
3294b10b | 369 | if (!target->auth || strcmp(target->auth->name,cargv[1]) || (target->auth->userid != userid) || (target->accountts != accountts)) { |
c4ffdb9b CP |
370 | return CMD_OK; |
371 | } | |
372 | ||
92acf9ae CP |
373 | oldflags = target->auth->flags; |
374 | arg[0] = target->auth; | |
375 | arg[1] = &oldflags; | |
c4ffdb9b CP |
376 | |
377 | if (cargc>=5) | |
378 | target->auth->flags=accountflags; | |
379 | ||
380 | triggerhook(HOOK_AUTH_FLAGSUPDATED, (void *)arg); | |
381 | ||
c86edd1d Q |
382 | return CMD_OK; |
383 | } | |
384 | ||
385 | SetAccount(target); | |
c4ffdb9b CP |
386 | target->accountts=accountts; |
387 | ||
388 | if(!userid) { | |
47657339 | 389 | target->auth=NULL; |
3294b10b CP |
390 | target->authname=malloc(strlen(cargv[1]) + 1); |
391 | strcpy(target->authname,cargv[1]); | |
c4ffdb9b | 392 | } else { |
5bfb1d14 | 393 | target->auth=findorcreateauthname(userid, cargv[1]); |
c4ffdb9b | 394 | target->auth->usercount++; |
3294b10b | 395 | target->authname=target->auth->name; |
c4ffdb9b CP |
396 | target->nextbyauthname = target->auth->nicks; |
397 | target->auth->nicks = target; | |
398 | if (cargc>=5) | |
399 | target->auth->flags=accountflags; | |
47657339 | 400 | } |
c4ffdb9b | 401 | |
c86edd1d | 402 | triggerhook(HOOK_NICK_ACCOUNT, (void *)target); |
526e7c1d | 403 | |
c86edd1d Q |
404 | return CMD_OK; |
405 | } | |
406 | ||
6885ae9c CP |
407 | int handleprivmsg(void *source, int cargc, char **cargv) { |
408 | nick *sender; | |
409 | char *message; | |
410 | void *args[3]; | |
411 | ||
412 | if (cargc<2) | |
413 | return CMD_OK; | |
414 | ||
415 | if (cargv[0][0]!='$') | |
416 | return CMD_OK; | |
417 | ||
418 | sender=getnickbynumericstr((char *)source); | |
419 | ||
420 | if (!match2strings(cargv[0] + 1,myserver->content)) | |
421 | return CMD_OK; | |
422 | ||
423 | message=cargv[0]; | |
424 | ||
425 | args[0]=sender; | |
426 | args[1]=cargv[0]; | |
427 | args[2]=cargv[1]; | |
428 | ||
429 | triggerhook(HOOK_NICK_MASKPRIVMSG, (void *)args); | |
430 | ||
431 | return CMD_OK; | |
432 | } | |
433 | ||
5144ddc4 | 434 | int handleawaymsg(void *source, int cargc, char **cargv) { |
435 | nick *sender; | |
436 | ||
437 | /* Check source is a valid user */ | |
438 | if (!(sender=getnickbynumericstr(source))) { | |
439 | return CMD_OK; | |
440 | } | |
441 | ||
442 | /* Done with the old away message either way */ | |
443 | freesstring(sender->away); | |
444 | sender->away=NULL; | |
445 | ||
446 | /* If we have an arg and it isn't an empty string, this sets a new message */ | |
447 | if (cargc > 0 && *(cargv[0])) { | |
448 | sender->away=getsstring(cargv[0], AWAYLEN); | |
449 | } | |
450 | ||
451 | return CMD_OK; | |
452 | } | |
42d7af35 GB |
453 | |
454 | int handleaddcloak(void *source, int cargc, char **cargv) { | |
455 | nick *sender, *target; | |
456 | ||
457 | /* Check source is a valid user */ | |
458 | if (!(sender=getnickbynumericstr(source))) { | |
459 | return CMD_OK; | |
460 | } | |
461 | ||
462 | if (cargc < 1) | |
463 | return CMD_OK; | |
464 | ||
465 | if (!(target=getnickbynumericstr(cargv[0]))) { | |
466 | return CMD_OK; | |
467 | } | |
468 | ||
469 | addcloaktarget(sender, target); | |
470 | ||
471 | return CMD_OK; | |
472 | } | |
473 | ||
474 | int handleclearcloak(void *source, int cargc, char **cargv) { | |
475 | nick *sender; | |
476 | ||
477 | /* Check source is a valid user */ | |
478 | if (!(sender=getnickbynumericstr(source))) { | |
479 | return CMD_OK; | |
480 | } | |
481 | ||
482 | clearcloaktargets(sender); | |
483 | ||
484 | return CMD_OK; | |
485 | } | |
486 |