2 * IRC - Internet Relay Chat, ircd/m_who.c
3 * Copyright (C) 1990 Jarkko Oikarinen and
4 * University of Oulu, Computing Center
6 * See file AUTHORS in IRC package for additional names of
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)
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.
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.
27 * m_functions execute protocol messages on this server:
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...).
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.
39 * (!IsServer(cptr)) => (cptr == sptr), because
40 * prefixes are taken *only* from servers...
43 * (sptr == cptr) => the message didn't
46 * (sptr != cptr && IsServer(sptr) means
47 * the prefix specified servername. (?)
49 * (sptr != cptr && !IsServer(sptr) means
50 * that message originated from a remote
55 * (!IsServer(sptr)) means that, sptr can safely
56 * taken as defining the target structure of the
57 * message in this server.
59 * *Always* true (if 'parse' and others are working correct):
61 * 1) sptr->from == cptr (note: cptr->from == cptr)
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 ]
68 * parc number of variable parameter strings (if zero,
69 * parv is allowed to be NULL)
71 * parv a NULL terminated list of parameter pointers,
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*
79 * note: it is guaranteed that parv[0]..parv[parc-1] are all
88 #include "ircd_chattr.h"
89 #include "ircd_features.h"
91 #include "ircd_reply.h"
92 #include "ircd_string.h"
99 /* #include <assert.h> -- Now using assert in ircd_log.h */
104 * A little spin-marking utility to tell us which clients we have already
105 * processed and which not
107 static int who_marker = 0;
108 static void move_marker(void)
112 struct Client *cptr = GlobalClientList;
115 cli_marker(cptr) = 0;
116 cptr = cli_next(cptr);
122 #define CheckMark(x, y) ((x == y) ? 0 : (x = y))
123 #define Process(cptr) CheckMark(cli_marker(cptr), who_marker)
126 * m_who - generic message handler
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 !.
138 int m_who(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
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 */
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 ?
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
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 */
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])
163 if (mask && ((mask[0] == '\0') ||
164 (mask[1] == '\0' && ((mask[0] == '0') || (mask[0] == '*')))))
167 /* Evaluate the flags now, we consider the second parameter
168 as "matchFlags%fieldsToInclude,querytype" */
169 bitsel = fields = counter = matchsel = 0;
171 if (parc > 2 && parv[2] && *parv[2])
174 while (((ch = *(p++))) && (ch != '%') && (ch != ','))
179 bitsel |= WHOSELECT_DELAY;
183 bitsel |= WHOSELECT_OPER;
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]);
194 matchsel |= WHO_FIELD_NIC;
198 matchsel |= WHO_FIELD_UID;
202 matchsel |= WHO_FIELD_HOS;
206 matchsel |= WHO_FIELD_NIP;
210 matchsel |= WHO_FIELD_SER;
214 matchsel |= WHO_FIELD_REN;
218 matchsel |= WHO_FIELD_ACC;
222 while ((ch = *p++) && (ch != ','))
229 fields |= WHO_FIELD_CHA;
233 fields |= WHO_FIELD_DIS;
237 fields |= WHO_FIELD_FLA;
241 fields |= WHO_FIELD_HOS;
245 fields |= WHO_FIELD_NIP;
249 fields |= WHO_FIELD_IDL;
252 fields |= WHO_FIELD_NIC;
256 fields |= WHO_FIELD_REN;
260 fields |= WHO_FIELD_SER;
264 fields |= WHO_FIELD_QTY;
268 fields |= WHO_FIELD_UID;
272 fields |= WHO_FIELD_ACC;
283 matchsel = WHO_FIELD_DEF;
287 if (feature_bool(FEAT_HIS_WHO_SERVERNAME) && !IsAnOper(sptr))
288 matchsel &= ~WHO_FIELD_SER;
290 if (qrt && (fields & WHO_FIELD_QTY))
293 if (!((*p > '9') || (*p < '0')))
295 if (!((*p > '9') || (*p < '0')))
297 if (!((*p > '9') || (*p < '0')))
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))
309 commas = (mask && strchr(mask, ','));
311 /* First treat mask as a list of plain nicks/channels */
314 strcpy(mymask, mask);
315 for (p = 0, nick = ircd_strtok(&p, mymask, ","); nick;
316 nick = ircd_strtok(&p, 0, ","))
318 if (IsChannelName(nick) && (chptr = FindChannel(nick)))
320 isthere = (find_channel_member(sptr, chptr) != 0);
321 if (isthere || SEE_CHANNEL(sptr, chptr, bitsel))
323 struct Membership* member;
324 for (member = chptr->members; member; member = member->next_member)
326 acptr = member->user;
327 if ((bitsel & WHOSELECT_OPER) && !SeeOper(sptr,acptr))
330 && ((member->status & CHFL_ZOMBIE)
331 || ((member->status & CHFL_DELAYED)
332 && !(bitsel & WHOSELECT_DELAY))))
334 if (!(isthere || (SEE_USER(sptr, acptr, bitsel))))
336 if (!Process(acptr)) /* This can't be moved before other checks */
338 if (!(isthere || (SHOW_MORE(sptr, counter))))
340 do_who(sptr, acptr, chptr, fields, qrt);
346 if ((acptr = FindUser(nick)) &&
347 ((!(bitsel & WHOSELECT_OPER)) || SeeOper(sptr,acptr)) &&
348 Process(acptr) && SHOW_MORE(sptr, counter))
350 do_who(sptr, acptr, 0, fields, qrt);
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)))
360 struct irc_in_addr imask;
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;
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)
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))
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)
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)))
418 if (!SHOW_MORE(sptr, counter))
420 do_who(sptr, acptr, chptr, fields, qrt);
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))
429 if (!(IsUser(acptr) && Process(acptr)))
431 if ((bitsel & WHOSELECT_OPER) && !SeeOper(sptr,acptr))
433 if (!(SEE_USER(sptr, acptr, bitsel)))
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)
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)))
456 if (!SHOW_MORE(sptr, counter))
458 do_who(sptr, acptr, 0, fields, qrt);
462 /* Make a clean mask suitable to be sent in the "end of" */
463 if (mask && (p = strchr(mask, ' ')))
465 send_reply(sptr, RPL_ENDOFWHO, BadPtr(mask) ? "*" : mask);
467 /* Notify the user if we decided that his query was too long */
469 send_reply(sptr, ERR_QUERYTOOLONG, "WHO");