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1 | /* | |
2 | * IRC - Internet Relay Chat, ircd/m_whois.c | |
3 | * Copyright (C) 1990 Jarkko Oikarinen and | |
4 | * University of Oulu, Computing Center | |
5 | * | |
6 | * See file AUTHORS in IRC package for additional names of | |
7 | * the programmers. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 1, or (at your option) | |
12 | * any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | * | |
23 | * $Id: m_whois.c,v 1.37 2005/07/15 21:12:02 entrope Exp $ | |
24 | */ | |
25 | ||
26 | /* | |
27 | * m_functions execute protocol messages on this server: | |
28 | * | |
29 | * cptr is always NON-NULL, pointing to a *LOCAL* client | |
30 | * structure (with an open socket connected!). This | |
31 | * identifies the physical socket where the message | |
32 | * originated (or which caused the m_function to be | |
33 | * executed--some m_functions may call others...). | |
34 | * | |
35 | * sptr is the source of the message, defined by the | |
36 | * prefix part of the message if present. If not | |
37 | * or prefix not found, then sptr==cptr. | |
38 | * | |
39 | * (!IsServer(cptr)) => (cptr == sptr), because | |
40 | * prefixes are taken *only* from servers... | |
41 | * | |
42 | * (IsServer(cptr)) | |
43 | * (sptr == cptr) => the message didn't | |
44 | * have the prefix. | |
45 | * | |
46 | * (sptr != cptr && IsServer(sptr) means | |
47 | * the prefix specified servername. (?) | |
48 | * | |
49 | * (sptr != cptr && !IsServer(sptr) means | |
50 | * that message originated from a remote | |
51 | * user (not local). | |
52 | * | |
53 | * combining | |
54 | * | |
55 | * (!IsServer(sptr)) means that, sptr can safely | |
56 | * taken as defining the target structure of the | |
57 | * message in this server. | |
58 | * | |
59 | * *Always* true (if 'parse' and others are working correct): | |
60 | * | |
61 | * 1) sptr->from == cptr (note: cptr->from == cptr) | |
62 | * | |
63 | * 2) MyConnect(sptr) <=> sptr == cptr (e.g. sptr | |
64 | * *cannot* be a local connection, unless it's | |
65 | * actually cptr!). [MyConnect(x) should probably | |
66 | * be defined as (x == x->from) --msa ] | |
67 | * | |
68 | * parc number of variable parameter strings (if zero, | |
69 | * parv is allowed to be NULL) | |
70 | * | |
71 | * parv a NULL terminated list of parameter pointers, | |
72 | * | |
73 | * parv[0], sender (prefix string), if not present | |
74 | * this points to an empty string. | |
75 | * parv[1]...parv[parc-1] | |
76 | * pointers to additional parameters | |
77 | * parv[parc] == NULL, *always* | |
78 | * | |
79 | * note: it is guaranteed that parv[0]..parv[parc-1] are all | |
80 | * non-NULL pointers. | |
81 | */ | |
82 | #include "config.h" | |
83 | ||
84 | #include "channel.h" | |
85 | #include "client.h" | |
86 | #include "hash.h" | |
87 | #include "ircd.h" | |
88 | #include "ircd_features.h" | |
89 | #include "ircd_log.h" | |
90 | #include "ircd_reply.h" | |
91 | #include "ircd_string.h" | |
92 | #include "match.h" | |
93 | #include "msg.h" | |
94 | #include "numeric.h" | |
95 | #include "numnicks.h" | |
96 | #include "s_user.h" | |
97 | #include "send.h" | |
98 | #include "whocmds.h" | |
99 | ||
100 | /* #include <assert.h> -- Now using assert in ircd_log.h */ | |
101 | #include <string.h> | |
102 | ||
103 | /* | |
104 | * 2000-07-01: Isomer | |
105 | * * Rewritten to make this understandable | |
106 | * * You can no longer /whois unregistered clients. | |
107 | * | |
108 | * | |
109 | * General rules: | |
110 | * /whois nick always shows the nick. | |
111 | * /whois wild* shows the nick if: | |
112 | * * they aren't +i and aren't on any channels. | |
113 | * * they are on a common channel. | |
114 | * * they aren't +i and are on a public channel. (not +p and not +s) | |
115 | * * they aren't +i and are on a private channel. (+p but not +s) | |
116 | * Or to look at it another way (I think): | |
117 | * * +i users are only shown if your on a common channel. | |
118 | * * users on +s channels only aren't shown. | |
119 | * | |
120 | * whois doesn't show what channels a +k client is on, for the reason that | |
121 | * /whois X or /whois W floods a user off the server. :) | |
122 | * | |
123 | * nb: if the code and this comment disagree, the codes right and I screwed | |
124 | * up. | |
125 | */ | |
126 | ||
127 | /* | |
128 | * Send whois information for acptr to sptr | |
129 | */ | |
130 | static void do_whois(struct Client* sptr, struct Client *acptr, int parc) | |
131 | { | |
132 | struct Client *a2cptr=0; | |
133 | struct Channel *chptr=0; | |
134 | int mlen; | |
135 | int len; | |
136 | static char buf[512]; | |
137 | ||
138 | const struct User* user = cli_user(acptr); | |
139 | const char* name = (!*(cli_name(acptr))) ? "?" : cli_name(acptr); | |
140 | a2cptr = feature_bool(FEAT_HIS_WHOIS_SERVERNAME) && !IsAnOper(sptr) | |
141 | && sptr != acptr ? &his : user->server; | |
142 | assert(user); | |
143 | send_reply(sptr, RPL_WHOISUSER, name, user->username, user->host, | |
144 | cli_info(acptr)); | |
145 | ||
146 | /* Display the channels this user is on. */ | |
147 | if (!IsChannelService(acptr)) | |
148 | { | |
149 | struct Membership* chan; | |
150 | mlen = strlen(cli_name(&me)) + strlen(cli_name(sptr)) + 12 + strlen(name); | |
151 | len = 0; | |
152 | *buf = '\0'; | |
153 | for (chan = user->channel; chan; chan = chan->next_channel) | |
154 | { | |
155 | chptr = chan->channel; | |
156 | ||
157 | if (!ShowChannel(sptr, chptr) | |
158 | && !(IsOper(sptr) && IsLocalChannel(chptr->chname))) | |
159 | continue; | |
160 | ||
161 | if (acptr != sptr && IsZombie(chan)) | |
162 | continue; | |
163 | ||
164 | /* Don't show local channels when HIS is defined, unless it's a | |
165 | * remote WHOIS --ULtimaTe_ | |
166 | */ | |
167 | if (IsLocalChannel(chptr->chname) && (acptr != sptr) && (parc == 2) | |
168 | && feature_bool(FEAT_HIS_WHOIS_LOCALCHAN) && !IsAnOper(sptr)) | |
169 | continue; | |
170 | ||
171 | if (len+strlen(chptr->chname) + mlen > BUFSIZE - 5) | |
172 | { | |
173 | send_reply(sptr, SND_EXPLICIT | RPL_WHOISCHANNELS, "%s :%s", name, buf); | |
174 | *buf = '\0'; | |
175 | len = 0; | |
176 | } | |
177 | if (IsDeaf(acptr)) | |
178 | *(buf + len++) = '-'; | |
179 | if (IsOper(sptr) && !ShowChannel(sptr, chptr)) | |
180 | *(buf + len++) = '*'; | |
181 | if (IsDelayedJoin(chan) && (sptr != acptr)) | |
182 | *(buf + len++) = '<'; | |
183 | else if (IsChanOp(chan)) | |
184 | *(buf + len++) = '@'; | |
185 | else if (HasVoice(chan)) | |
186 | *(buf + len++) = '+'; | |
187 | else if (IsZombie(chan)) | |
188 | *(buf + len++) = '!'; | |
189 | if (len) | |
190 | *(buf + len) = '\0'; | |
191 | strcpy(buf + len, chptr->chname); | |
192 | len += strlen(chptr->chname); | |
193 | strcat(buf + len, " "); | |
194 | len++; | |
195 | } | |
196 | if (buf[0] != '\0') | |
197 | send_reply(sptr, RPL_WHOISCHANNELS, name, buf); | |
198 | } | |
199 | ||
200 | send_reply(sptr, RPL_WHOISSERVER, name, cli_name(a2cptr), | |
201 | cli_info(a2cptr)); | |
202 | ||
203 | if (user) | |
204 | { | |
205 | if (user->away) | |
206 | send_reply(sptr, RPL_AWAY, name, user->away); | |
207 | ||
208 | if (SeeOper(sptr,acptr)) | |
209 | send_reply(sptr, RPL_WHOISOPERATOR, name); | |
210 | ||
211 | if (IsAccount(acptr)) | |
212 | send_reply(sptr, RPL_WHOISACCOUNT, name, user->account); | |
213 | ||
214 | if (HasHiddenHost(acptr) && (IsAnOper(sptr) || acptr == sptr)) | |
215 | send_reply(sptr, RPL_WHOISACTUALLY, name, user->username, | |
216 | user->realhost, ircd_ntoa(&cli_ip(acptr))); | |
217 | ||
218 | /* Hint: if your looking to add more flags to a user, eg +h, here's | |
219 | * probably a good place to add them :) | |
220 | */ | |
221 | ||
222 | if (MyConnect(acptr) && (!feature_bool(FEAT_HIS_WHOIS_IDLETIME) || | |
223 | (sptr == acptr || IsAnOper(sptr) || parc >= 3))) | |
224 | send_reply(sptr, RPL_WHOISIDLE, name, CurrentTime - user->last, | |
225 | cli_firsttime(acptr)); | |
226 | } | |
227 | } | |
228 | ||
229 | /* | |
230 | * Search and return as many people as matched by the wild 'nick'. | |
231 | * returns the number of people found (or, obviously, 0, if none where | |
232 | * found). | |
233 | */ | |
234 | static int do_wilds(struct Client* sptr, char *nick, int count, int parc) | |
235 | { | |
236 | struct Client *acptr; /* Current client we're considering */ | |
237 | struct User *user; /* the user portion of the client */ | |
238 | const char *name; /* the name of this client */ | |
239 | struct Membership* chan; | |
240 | int invis; /* does +i apply? */ | |
241 | int member; /* Is this user on any channels? */ | |
242 | int showperson; /* Should we show this person? */ | |
243 | int found = 0 ; /* How many were found? */ | |
244 | ||
245 | /* Ech! This is hideous! */ | |
246 | for (acptr = GlobalClientList; (acptr = next_client(acptr, nick)); | |
247 | acptr = cli_next(acptr)) | |
248 | { | |
249 | if (!IsRegistered(acptr)) | |
250 | continue; | |
251 | ||
252 | if (IsServer(acptr)) | |
253 | continue; | |
254 | /* | |
255 | * I'm always last :-) and acptr->next == 0!! | |
256 | * | |
257 | * Isomer: Does this strike anyone else as being a horrible hideous | |
258 | * hack? | |
259 | */ | |
260 | if (IsMe(acptr)) { | |
261 | assert(!cli_next(acptr)); | |
262 | break; | |
263 | } | |
264 | ||
265 | /* | |
266 | * 'Rules' established for sending a WHOIS reply: | |
267 | * | |
268 | * - if wildcards are being used don't send a reply if | |
269 | * the querier isn't any common channels and the | |
270 | * client in question is invisible. | |
271 | * | |
272 | * - only send replies about common or public channels | |
273 | * the target user(s) are on; | |
274 | */ | |
275 | user = cli_user(acptr); | |
276 | name = (!*(cli_name(acptr))) ? "?" : cli_name(acptr); | |
277 | assert(user); | |
278 | ||
279 | invis = (acptr != sptr) && IsInvisible(acptr); | |
280 | member = (user && user->channel) ? 1 : 0; | |
281 | showperson = !invis && !member; | |
282 | ||
283 | /* Should we show this person now? */ | |
284 | if (showperson) { | |
285 | found++; | |
286 | do_whois(sptr, acptr, parc); | |
287 | if (count+found>MAX_WHOIS_LINES) | |
288 | return found; | |
289 | continue; | |
290 | } | |
291 | ||
292 | /* Step through the channels this user is on */ | |
293 | for (chan = user->channel; chan; chan = chan->next_channel) | |
294 | { | |
295 | struct Channel *chptr = chan->channel; | |
296 | ||
297 | /* If this is a public channel, show the person */ | |
298 | if (!invis && PubChannel(chptr)) { | |
299 | showperson = 1; | |
300 | break; | |
301 | } | |
302 | ||
303 | /* if this channel is +p and not +s, show them */ | |
304 | if (!invis && HiddenChannel(chptr) && !SecretChannel(chptr)) { | |
305 | showperson = 1; | |
306 | break; | |
307 | } | |
308 | ||
309 | member = find_channel_member(sptr, chptr) ? 1 : 0; | |
310 | if (invis && !member) | |
311 | continue; | |
312 | ||
313 | /* If sptr isn't really on this channel, skip it */ | |
314 | if (IsZombie(chan)) | |
315 | continue; | |
316 | ||
317 | /* Is this a common channel? */ | |
318 | if (member) { | |
319 | showperson = 1; | |
320 | break; | |
321 | } | |
322 | } /* of for (chan in channels) */ | |
323 | ||
324 | /* Don't show this person */ | |
325 | if (!showperson) | |
326 | continue; | |
327 | ||
328 | do_whois(sptr, acptr, parc); | |
329 | found++; | |
330 | if (count+found>MAX_WHOIS_LINES) | |
331 | return found; | |
332 | } /* of global client list */ | |
333 | ||
334 | return found; | |
335 | } | |
336 | ||
337 | /* | |
338 | * m_whois - generic message handler | |
339 | * | |
340 | * parv[0] = sender prefix | |
341 | * parv[1] = nickname masklist | |
342 | * | |
343 | * or | |
344 | * | |
345 | * parv[1] = target server, or a nickname representing a server to target. | |
346 | * parv[2] = nickname masklist | |
347 | */ | |
348 | int m_whois(struct Client* cptr, struct Client* sptr, int parc, char* parv[]) | |
349 | { | |
350 | char* nick; | |
351 | char* tmp; | |
352 | char* p = 0; | |
353 | int found = 0; | |
354 | int total = 0; | |
355 | int wildscount = 0; | |
356 | ||
357 | if (parc < 2) | |
358 | { | |
359 | send_reply(sptr, ERR_NONICKNAMEGIVEN); | |
360 | return 0; | |
361 | } | |
362 | ||
363 | if (parc > 2) | |
364 | { | |
365 | /* For convenience: Accept a nickname as first parameter, by replacing | |
366 | * it with the correct servername - as is needed by hunt_server(). | |
367 | * This is the secret behind the /whois nick nick trick. | |
368 | */ | |
369 | if (feature_int(FEAT_HIS_REMOTE)) | |
370 | { | |
371 | /* If remote queries are disabled, then use the *second* parameter of | |
372 | * of whois, so /whois nick nick still works. | |
373 | */ | |
374 | if (!IsAnOper(sptr)) | |
375 | { | |
376 | if (!FindUser(parv[2])) | |
377 | { | |
378 | send_reply(sptr, ERR_NOSUCHNICK, parv[2]); | |
379 | send_reply(sptr, RPL_ENDOFWHOIS, parv[2]); | |
380 | return 0; | |
381 | } | |
382 | parv[1] = parv[2]; | |
383 | } | |
384 | } | |
385 | ||
386 | if (hunt_server_cmd(sptr, CMD_WHOIS, cptr, 0, "%C :%s", 1, parc, parv) != | |
387 | HUNTED_ISME) | |
388 | return 0; | |
389 | ||
390 | parv[1] = parv[2]; | |
391 | } | |
392 | ||
393 | for (tmp = parv[1]; (nick = ircd_strtok(&p, tmp, ",")); tmp = 0) | |
394 | { | |
395 | int wilds; | |
396 | ||
397 | found = 0; | |
398 | ||
399 | collapse(nick); | |
400 | ||
401 | wilds = (strchr(nick, '?') || strchr(nick, '*')); | |
402 | if (!wilds) { | |
403 | struct Client *acptr = 0; | |
404 | /* No wildcards */ | |
405 | acptr = FindUser(nick); | |
406 | if (acptr && !IsServer(acptr)) { | |
407 | do_whois(sptr, acptr, parc); | |
408 | found = 1; | |
409 | } | |
410 | } | |
411 | else /* wilds */ | |
412 | { | |
413 | if (++wildscount > 3) { | |
414 | send_reply(sptr, ERR_QUERYTOOLONG, parv[1]); | |
415 | break; | |
416 | } | |
417 | found=do_wilds(sptr, nick, total, parc); | |
418 | } | |
419 | ||
420 | if (!found) | |
421 | send_reply(sptr, ERR_NOSUCHNICK, nick); | |
422 | total+=found; | |
423 | if (total >= MAX_WHOIS_LINES) { | |
424 | send_reply(sptr, ERR_QUERYTOOLONG, parv[1]); | |
425 | break; | |
426 | } | |
427 | if (p) | |
428 | p[-1] = ','; | |
429 | } /* of tokenised parm[1] */ | |
430 | send_reply(sptr, RPL_ENDOFWHOIS, parv[1]); | |
431 | ||
432 | return 0; | |
433 | } | |
434 | ||
435 | /* | |
436 | * ms_whois - server message handler | |
437 | * | |
438 | * parv[0] = sender prefix | |
439 | * parv[1] = nickname masklist | |
440 | * | |
441 | * or | |
442 | * | |
443 | * parv[1] = target server, or a nickname representing a server to target. | |
444 | * parv[2] = nickname masklist | |
445 | */ | |
446 | int ms_whois(struct Client* cptr, struct Client* sptr, int parc, char* parv[]) | |
447 | { | |
448 | char* nick; | |
449 | char* tmp; | |
450 | char* p = 0; | |
451 | int found = 0; | |
452 | int total = 0; | |
453 | ||
454 | if (parc < 2) | |
455 | { | |
456 | send_reply(sptr, ERR_NONICKNAMEGIVEN); | |
457 | return 0; | |
458 | } | |
459 | ||
460 | if (parc > 2) | |
461 | { | |
462 | if (hunt_server_cmd(sptr, CMD_WHOIS, cptr, 0, "%C :%s", 1, parc, parv) != | |
463 | HUNTED_ISME) | |
464 | return 0; | |
465 | parv[1] = parv[2]; | |
466 | } | |
467 | ||
468 | total = 0; | |
469 | ||
470 | for (tmp = parv[1]; (nick = ircd_strtok(&p, tmp, ",")); tmp = 0) | |
471 | { | |
472 | struct Client *acptr = 0; | |
473 | ||
474 | found = 0; | |
475 | ||
476 | collapse(nick); | |
477 | ||
478 | ||
479 | acptr = FindUser(nick); | |
480 | if (acptr && !IsServer(acptr)) { | |
481 | found++; | |
482 | do_whois(sptr, acptr, parc); | |
483 | } | |
484 | ||
485 | if (!found) | |
486 | send_reply(sptr, ERR_NOSUCHNICK, nick); | |
487 | ||
488 | total+=found; | |
489 | ||
490 | if (total >= MAX_WHOIS_LINES) { | |
491 | send_reply(sptr, ERR_QUERYTOOLONG, parv[1]); | |
492 | break; | |
493 | } | |
494 | ||
495 | if (p) | |
496 | p[-1] = ','; | |
497 | } /* of tokenised parm[1] */ | |
498 | send_reply(sptr, RPL_ENDOFWHOIS, parv[1]); | |
499 | ||
500 | return 0; | |
501 | } | |
502 |