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189935b1 | 1 | /* |
2 | * IRC - Internet Relay Chat, ircd/m_who.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_who.c,v 1.22.2.1 2005/10/01 03:45:19 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_chattr.h" | |
89 | #include "ircd_features.h" | |
90 | #include "ircd_log.h" | |
91 | #include "ircd_reply.h" | |
92 | #include "ircd_string.h" | |
93 | #include "match.h" | |
94 | #include "numeric.h" | |
95 | #include "numnicks.h" | |
96 | #include "send.h" | |
97 | #include "whocmds.h" | |
98 | ||
99 | /* #include <assert.h> -- Now using assert in ircd_log.h */ | |
100 | #include <string.h> | |
101 | ||
102 | ||
103 | /* | |
104 | * A little spin-marking utility to tell us which clients we have already | |
105 | * processed and which not | |
106 | */ | |
107 | static int who_marker = 0; | |
108 | static void move_marker(void) | |
109 | { | |
110 | if (!++who_marker) | |
111 | { | |
112 | struct Client *cptr = GlobalClientList; | |
113 | while (cptr) | |
114 | { | |
115 | cli_marker(cptr) = 0; | |
116 | cptr = cli_next(cptr); | |
117 | } | |
118 | who_marker++; | |
119 | } | |
120 | } | |
121 | ||
122 | #define CheckMark(x, y) ((x == y) ? 0 : (x = y)) | |
123 | #define Process(cptr) CheckMark(cli_marker(cptr), who_marker) | |
124 | ||
125 | /* | |
126 | * m_who - generic message handler | |
127 | * | |
128 | * parv[0] = sender prefix | |
129 | * parv[1] = nickname mask list | |
130 | * parv[2] = additional selection flag, only 'o' for now. | |
131 | * and %flags to specify what fields to output | |
132 | * plus a ,querytype if the t flag is specified | |
133 | * so the final thing will be like o%tnchu,777 | |
134 | * parv[3] = _optional_ parameter that overrides parv[1] | |
135 | * This can be used as "/quote who foo % :The Black Hacker | |
136 | * to find me, parv[3] _can_ contain spaces !. | |
137 | */ | |
138 | int m_who(struct Client* cptr, struct Client* sptr, int parc, char* parv[]) | |
139 | { | |
140 | char *mask; /* The mask we are looking for */ | |
141 | char ch; /* Scratch char register */ | |
142 | struct Channel *chptr; /* Channel to show */ | |
143 | struct Client *acptr; /* Client to show */ | |
144 | ||
145 | int bitsel; /* Mask of selectors to apply */ | |
146 | int matchsel; /* Which fields the match should apply on */ | |
147 | int counter; /* Query size counter, | |
148 | initially used to count fields */ | |
149 | int commas; /* Does our mask contain any comma ? | |
150 | If so is a list.. */ | |
151 | int fields; /* Mask of fields to show */ | |
152 | int isthere = 0; /* When this set the user is member of chptr */ | |
153 | char *nick; /* Single element extracted from | |
154 | the mask list */ | |
155 | char *p; /* Scratch char pointer */ | |
156 | char *qrt; /* Pointer to the query type */ | |
157 | static char mymask[512]; /* To save the mask before corrupting it */ | |
158 | ||
159 | /* Let's find where is our mask, and if actually contains something */ | |
160 | mask = ((parc > 1) ? parv[1] : 0); | |
161 | if (parc > 3 && parv[3]) | |
162 | mask = parv[3]; | |
163 | if (mask && ((mask[0] == '\0') || | |
164 | (mask[1] == '\0' && ((mask[0] == '0') || (mask[0] == '*'))))) | |
165 | mask = 0; | |
166 | ||
167 | /* Evaluate the flags now, we consider the second parameter | |
168 | as "matchFlags%fieldsToInclude,querytype" */ | |
169 | bitsel = fields = counter = matchsel = 0; | |
170 | qrt = 0; | |
171 | if (parc > 2 && parv[2] && *parv[2]) | |
172 | { | |
173 | p = parv[2]; | |
174 | while (((ch = *(p++))) && (ch != '%') && (ch != ',')) | |
175 | switch (ch) | |
176 | { | |
177 | case 'd': | |
178 | case 'D': | |
179 | bitsel |= WHOSELECT_DELAY; | |
180 | continue; | |
181 | case 'o': | |
182 | case 'O': | |
183 | bitsel |= WHOSELECT_OPER; | |
184 | continue; | |
185 | case 'x': | |
186 | case 'X': | |
187 | bitsel |= WHOSELECT_EXTRA; | |
188 | if (HasPriv(sptr, PRIV_WHOX)) | |
189 | log_write(LS_WHO, L_INFO, LOG_NOSNOTICE, "%#C WHO %s %s", sptr, | |
190 | (BadPtr(parv[3]) ? parv[1] : parv[3]), parv[2]); | |
191 | continue; | |
192 | case 'n': | |
193 | case 'N': | |
194 | matchsel |= WHO_FIELD_NIC; | |
195 | continue; | |
196 | case 'u': | |
197 | case 'U': | |
198 | matchsel |= WHO_FIELD_UID; | |
199 | continue; | |
200 | case 'h': | |
201 | case 'H': | |
202 | matchsel |= WHO_FIELD_HOS; | |
203 | continue; | |
204 | case 'i': | |
205 | case 'I': | |
206 | matchsel |= WHO_FIELD_NIP; | |
207 | continue; | |
208 | case 's': | |
209 | case 'S': | |
210 | matchsel |= WHO_FIELD_SER; | |
211 | continue; | |
212 | case 'r': | |
213 | case 'R': | |
214 | matchsel |= WHO_FIELD_REN; | |
215 | continue; | |
216 | case 'a': | |
217 | case 'A': | |
218 | matchsel |= WHO_FIELD_ACC; | |
219 | continue; | |
220 | } | |
221 | if (ch == '%') | |
222 | while ((ch = *p++) && (ch != ',')) | |
223 | { | |
224 | counter++; | |
225 | switch (ch) | |
226 | { | |
227 | case 'c': | |
228 | case 'C': | |
229 | fields |= WHO_FIELD_CHA; | |
230 | break; | |
231 | case 'd': | |
232 | case 'D': | |
233 | fields |= WHO_FIELD_DIS; | |
234 | break; | |
235 | case 'f': | |
236 | case 'F': | |
237 | fields |= WHO_FIELD_FLA; | |
238 | break; | |
239 | case 'h': | |
240 | case 'H': | |
241 | fields |= WHO_FIELD_HOS; | |
242 | break; | |
243 | case 'i': | |
244 | case 'I': | |
245 | fields |= WHO_FIELD_NIP; | |
246 | break; | |
247 | case 'l': | |
248 | case 'L': | |
249 | fields |= WHO_FIELD_IDL; | |
250 | case 'n': | |
251 | case 'N': | |
252 | fields |= WHO_FIELD_NIC; | |
253 | break; | |
254 | case 'r': | |
255 | case 'R': | |
256 | fields |= WHO_FIELD_REN; | |
257 | break; | |
258 | case 's': | |
259 | case 'S': | |
260 | fields |= WHO_FIELD_SER; | |
261 | break; | |
262 | case 't': | |
263 | case 'T': | |
264 | fields |= WHO_FIELD_QTY; | |
265 | break; | |
266 | case 'u': | |
267 | case 'U': | |
268 | fields |= WHO_FIELD_UID; | |
269 | break; | |
270 | case 'a': | |
271 | case 'A': | |
272 | fields |= WHO_FIELD_ACC; | |
273 | break; | |
274 | default: | |
275 | break; | |
276 | } | |
277 | }; | |
278 | if (ch) | |
279 | qrt = p; | |
280 | } | |
281 | ||
282 | if (!matchsel) | |
283 | matchsel = WHO_FIELD_DEF; | |
284 | if (!fields) | |
285 | counter = 7; | |
286 | ||
287 | if (feature_bool(FEAT_HIS_WHO_SERVERNAME) && !IsAnOper(sptr)) | |
288 | matchsel &= ~WHO_FIELD_SER; | |
289 | ||
290 | if (qrt && (fields & WHO_FIELD_QTY)) | |
291 | { | |
292 | p = qrt; | |
293 | if (!((*p > '9') || (*p < '0'))) | |
294 | p++; | |
295 | if (!((*p > '9') || (*p < '0'))) | |
296 | p++; | |
297 | if (!((*p > '9') || (*p < '0'))) | |
298 | p++; | |
299 | *p = '\0'; | |
300 | } | |
301 | else | |
302 | qrt = 0; | |
303 | ||
304 | /* I'd love to add also a check on the number of matches fields per time */ | |
305 | counter = (2048 / (counter + 4)); | |
306 | if (mask && (strlen(mask) > 510)) | |
307 | mask[510] = '\0'; | |
308 | move_marker(); | |
309 | commas = (mask && strchr(mask, ',')); | |
310 | ||
311 | /* First treat mask as a list of plain nicks/channels */ | |
312 | if (mask) | |
313 | { | |
314 | strcpy(mymask, mask); | |
315 | for (p = 0, nick = ircd_strtok(&p, mymask, ","); nick; | |
316 | nick = ircd_strtok(&p, 0, ",")) | |
317 | { | |
318 | if (IsChannelName(nick) && (chptr = FindChannel(nick))) | |
319 | { | |
320 | isthere = (find_channel_member(sptr, chptr) != 0); | |
321 | if (isthere || SEE_CHANNEL(sptr, chptr, bitsel)) | |
322 | { | |
323 | struct Membership* member; | |
324 | for (member = chptr->members; member; member = member->next_member) | |
325 | { | |
326 | acptr = member->user; | |
327 | if ((bitsel & WHOSELECT_OPER) && !SeeOper(sptr,acptr)) | |
328 | continue; | |
329 | if ((acptr != sptr) | |
330 | && ((member->status & CHFL_ZOMBIE) | |
331 | || ((member->status & CHFL_DELAYED) | |
332 | && !(bitsel & WHOSELECT_DELAY)))) | |
333 | continue; | |
334 | if (!(isthere || (SEE_USER(sptr, acptr, bitsel)))) | |
335 | continue; | |
336 | if (!Process(acptr)) /* This can't be moved before other checks */ | |
337 | continue; | |
338 | if (!(isthere || (SHOW_MORE(sptr, counter)))) | |
339 | break; | |
340 | do_who(sptr, acptr, chptr, fields, qrt); | |
341 | } | |
342 | } | |
343 | } | |
344 | else | |
345 | { | |
346 | if ((acptr = FindUser(nick)) && | |
347 | ((!(bitsel & WHOSELECT_OPER)) || SeeOper(sptr,acptr)) && | |
348 | Process(acptr) && SHOW_MORE(sptr, counter)) | |
349 | { | |
350 | do_who(sptr, acptr, 0, fields, qrt); | |
351 | } | |
352 | } | |
353 | } | |
354 | } | |
355 | ||
356 | /* If we didn't have any comma in the mask treat it as a | |
357 | real mask and try to match all relevant fields */ | |
358 | if (!(commas || (counter < 1))) | |
359 | { | |
360 | struct irc_in_addr imask; | |
361 | int minlen, cset; | |
362 | unsigned char ibits; | |
363 | ||
364 | if (mask) | |
365 | { | |
366 | matchcomp(mymask, &minlen, &cset, mask); | |
367 | if (!ipmask_parse(mask, &imask, &ibits)) | |
368 | matchsel &= ~WHO_FIELD_NIP; | |
369 | if ((minlen > NICKLEN) || !(cset & NTL_IRCNK)) | |
370 | matchsel &= ~WHO_FIELD_NIC; | |
371 | if ((matchsel & WHO_FIELD_SER) && | |
372 | ((minlen > HOSTLEN) || (!(cset & NTL_IRCHN)) | |
373 | || (!markMatchexServer(mymask, minlen)))) | |
374 | matchsel &= ~WHO_FIELD_SER; | |
375 | if ((minlen > USERLEN) || !(cset & NTL_IRCUI)) | |
376 | matchsel &= ~WHO_FIELD_UID; | |
377 | if ((minlen > HOSTLEN) || !(cset & NTL_IRCHN)) | |
378 | matchsel &= ~WHO_FIELD_HOS; | |
379 | if ((minlen > ACCOUNTLEN)) | |
380 | matchsel &= ~WHO_FIELD_ACC; | |
381 | } | |
382 | ||
383 | /* First of all loop through the clients in common channels */ | |
384 | if ((!(counter < 1)) && matchsel) { | |
385 | struct Membership* member; | |
386 | struct Membership* chan; | |
387 | for (chan = cli_user(sptr)->channel; chan; chan = chan->next_channel) { | |
388 | chptr = chan->channel; | |
389 | for (member = chptr->members; member; member = member->next_member) | |
390 | { | |
391 | acptr = member->user; | |
392 | if (!(IsUser(acptr) && Process(acptr))) | |
393 | continue; /* Now Process() is at the beginning, if we fail | |
394 | we'll never have to show this acptr in this query */ | |
395 | if ((bitsel & WHOSELECT_OPER) && !SeeOper(sptr,acptr)) | |
396 | continue; | |
397 | if ((mask) && | |
398 | ((!(matchsel & WHO_FIELD_NIC)) | |
399 | || matchexec(cli_name(acptr), mymask, minlen)) | |
400 | && ((!(matchsel & WHO_FIELD_UID)) | |
401 | || matchexec(cli_user(acptr)->username, mymask, minlen)) | |
402 | && ((!(matchsel & WHO_FIELD_SER)) | |
403 | || (!(HasFlag(cli_user(acptr)->server, FLAG_MAP)))) | |
404 | && ((!(matchsel & WHO_FIELD_HOS)) | |
405 | || matchexec(cli_user(acptr)->host, mymask, minlen)) | |
406 | && ((!(matchsel & WHO_FIELD_HOS)) | |
407 | || !HasHiddenHost(acptr) | |
408 | || !IsAnOper(sptr) | |
409 | || matchexec(cli_user(acptr)->realhost, mymask, minlen)) | |
410 | && ((!(matchsel & WHO_FIELD_REN)) | |
411 | || matchexec(cli_info(acptr), mymask, minlen)) | |
412 | && ((!(matchsel & WHO_FIELD_NIP)) | |
413 | || (HasHiddenHost(acptr) && !IsAnOper(sptr)) | |
414 | || !ipmask_check(&cli_ip(acptr), &imask, ibits)) | |
415 | && ((!(matchsel & WHO_FIELD_ACC)) | |
416 | || matchexec(cli_user(acptr)->account, mymask, minlen))) | |
417 | continue; | |
418 | if (!SHOW_MORE(sptr, counter)) | |
419 | break; | |
420 | do_who(sptr, acptr, chptr, fields, qrt); | |
421 | } | |
422 | } | |
423 | } | |
424 | /* Loop through all clients :-\, if we still have something to match to | |
425 | and we can show more clients */ | |
426 | if ((!(counter < 1)) && matchsel) | |
427 | for (acptr = cli_prev(&me); acptr; acptr = cli_prev(acptr)) | |
428 | { | |
429 | if (!(IsUser(acptr) && Process(acptr))) | |
430 | continue; | |
431 | if ((bitsel & WHOSELECT_OPER) && !SeeOper(sptr,acptr)) | |
432 | continue; | |
433 | if (!(SEE_USER(sptr, acptr, bitsel))) | |
434 | continue; | |
435 | if ((mask) && | |
436 | ((!(matchsel & WHO_FIELD_NIC)) | |
437 | || matchexec(cli_name(acptr), mymask, minlen)) | |
438 | && ((!(matchsel & WHO_FIELD_UID)) | |
439 | || matchexec(cli_user(acptr)->username, mymask, minlen)) | |
440 | && ((!(matchsel & WHO_FIELD_SER)) | |
441 | || (!(HasFlag(cli_user(acptr)->server, FLAG_MAP)))) | |
442 | && ((!(matchsel & WHO_FIELD_HOS)) | |
443 | || matchexec(cli_user(acptr)->host, mymask, minlen)) | |
444 | && ((!(matchsel & WHO_FIELD_HOS)) | |
445 | || !HasHiddenHost(acptr) | |
446 | || !IsAnOper(sptr) | |
447 | || matchexec(cli_user(acptr)->realhost, mymask, minlen)) | |
448 | && ((!(matchsel & WHO_FIELD_REN)) | |
449 | || matchexec(cli_info(acptr), mymask, minlen)) | |
450 | && ((!(matchsel & WHO_FIELD_NIP)) | |
451 | || (HasHiddenHost(acptr) && !IsAnOper(sptr)) | |
452 | || !ipmask_check(&cli_ip(acptr), &imask, ibits)) | |
453 | && ((!(matchsel & WHO_FIELD_ACC)) | |
454 | || matchexec(cli_user(acptr)->account, mymask, minlen))) | |
455 | continue; | |
456 | if (!SHOW_MORE(sptr, counter)) | |
457 | break; | |
458 | do_who(sptr, acptr, 0, fields, qrt); | |
459 | } | |
460 | } | |
461 | ||
462 | /* Make a clean mask suitable to be sent in the "end of" */ | |
463 | if (mask && (p = strchr(mask, ' '))) | |
464 | *p = '\0'; | |
465 | send_reply(sptr, RPL_ENDOFWHO, BadPtr(mask) ? "*" : mask); | |
466 | ||
467 | /* Notify the user if we decided that his query was too long */ | |
468 | if (counter < 0) | |
469 | send_reply(sptr, ERR_QUERYTOOLONG, "WHO"); | |
470 | ||
471 | return 0; | |
472 | } |