ircd/whocmds.c

   1 /*
   2  * IRC - Internet Relay Chat, ircd/s_user.c (formerly ircd/s_msg.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 /** @file
  24  * @brief Support functions for /WHO-like commands.
  25  * @version $Id: whocmds.c,v 1.25 2005/09/27 03:59:55 entrope Exp $
  26  */
  27 #include "config.h"
  28
  29 #include "whocmds.h"
  30 #include "channel.h"
  31 #include "client.h"
  32 #include "hash.h"
  33 #include "ircd.h"
  34 #include "ircd_chattr.h"
  35 #include "ircd_features.h"
  36 #include "ircd_reply.h"
  37 #include "ircd_snprintf.h"
  38 #include "ircd_string.h"
  39 #include "list.h"
  40 #include "match.h"
  41 #include "numeric.h"
  42 #include "numnicks.h"
  43 #include "querycmds.h"
  44 #include "random.h"
  45 #include "s_bsd.h"
  46 #include "s_conf.h"
  47 #include "s_misc.h"
  48 #include "s_user.h"
  49 #include "send.h"
  50 #include "struct.h"
  51 #include "sys.h"
  52 #include "userload.h"
  53 #include "version.h"
  54 #include "whowas.h"
  55 #include "msg.h"
  56
  57 #include <fcntl.h>
  58 #include <stdio.h>
  59 #include <stdlib.h>
  60 #include <string.h>
  61 #include <sys/stat.h>
  62 #include <unistd.h>
  63
  64 /** Send a WHO reply to a client who asked.
  65  * @param[in] sptr Client who is searching for other users.
  66  * @param[in] acptr Client who may be shown to \a sptr.
  67  * @param[in] repchan Shared channel that provides visibility.
  68  * @param[in] fields Bitmask of WHO_FIELD_* values, indicating what to show.
  69  * @param[in] qrt Query type string (ignored unless \a fields & WHO_FIELD_QTY).
  70  */
  71 void do_who(struct Client* sptr, struct Client* acptr, struct Channel* repchan,
  72             int fields, char* qrt)
  73 {
  74   char *p1;
  75   struct Membership *chan = 0;
  76
  77   static char buf1[512];
  78   /* NOTE: with current fields list and sizes this _cannot_ overrun,
  79      and also the message finally sent shouldn't ever be truncated */
  80
  81   p1 = buf1;
  82   buf1[1] = '\0';
  83
  84   /* If we don't have a channel and we need one... try to find it,
  85      unless the listing is for a channel service, we already know
  86      that there are no common channels, thus use PubChannel and not
  87      SeeChannel */
  88   if (repchan)
  89     chan = find_channel_member(acptr, repchan);
  90   else if ((!fields || (fields & (WHO_FIELD_CHA | WHO_FIELD_FLA)))
  91            && !IsChannelService(acptr) && !IsNoChan(acptr))
  92   {
  93     for (chan = cli_user(acptr)->channel; chan; chan = chan->next_channel)
  94       if (PubChannel(chan->channel) &&
  95           (acptr == sptr || !IsZombie(chan)))
  96         break;
  97   }
  98
  99   /* Place the fields one by one in the buffer and send it
 100      note that fields == NULL means "default query" */
 101
 102   if (fields & WHO_FIELD_QTY)   /* Query type */
 103   {
 104     *(p1++) = ' ';
 105     if (BadPtr(qrt))
 106       *(p1++) = '0';
 107     else
 108       while ((*qrt) && (*(p1++) = *(qrt++)));
 109   }
 110
 111   if (!fields || (fields & WHO_FIELD_CHA))
 112   {
 113     char *p2;
 114     *(p1++) = ' ';
 115     if ((p2 = (chan ? chan->channel->chname : NULL)))
 116       while ((*p2) && (*(p1++) = *(p2++)));
 117     else
 118       *(p1++) = '*';
 119   }
 120
 121   if (!fields || (fields & WHO_FIELD_UID))
 122   {
 123     char *p2 = cli_user(acptr)->username;
 124     *(p1++) = ' ';
 125     while ((*p2) && (*(p1++) = *(p2++)));
 126   }
 127
 128   if (fields & WHO_FIELD_NIP)
 129   {
 130     const char* p2 = (HasHiddenHost(acptr) || HasSetHost(acptr)) && !IsAnOper(sptr) ?
 131       feature_str(FEAT_HIDDEN_IP) :
 132       ircd_ntoa(&cli_ip(acptr));
 133     *(p1++) = ' ';
 134     while ((*p2) && (*(p1++) = *(p2++)));
 135   }
 136
 137   if (!fields || (fields & WHO_FIELD_HOS))
 138   {
 139     char *p2 = cli_user(acptr)->host;
 140     *(p1++) = ' ';
 141     while ((*p2) && (*(p1++) = *(p2++)));
 142   }
 143
 144   if (!fields || (fields & WHO_FIELD_SER))
 145   {
 146     const char *p2 = (feature_bool(FEAT_HIS_WHO_SERVERNAME) && !IsAnOper(sptr)) ?
 147                        feature_str(FEAT_HIS_SERVERNAME) :
 148                        cli_name(cli_user(acptr)->server);
 149     *(p1++) = ' ';
 150     while ((*p2) && (*(p1++) = *(p2++)));
 151   }
 152
 153   if (!fields || (fields & WHO_FIELD_NIC))
 154   {
 155     char *p2 = cli_name(acptr);
 156     *(p1++) = ' ';
 157     while ((*p2) && (*(p1++) = *(p2++)));
 158   }
 159
 160   if (!fields || (fields & WHO_FIELD_FLA))
 161   {
 162     *(p1++) = ' ';
 163     if (cli_user(acptr)->away)
 164       *(p1++) = 'G';
 165     else
 166       *(p1++) = 'H';
 167     if SeeOper(sptr,acptr)
 168       *(p1++) = '*';
 169     if (!chan) {
 170       /* No flags possible for the channel, so skip them all. */
 171     }
 172     else if (fields) {
 173       /* If you specified flags then we assume you know how to parse
 174        * multiple channel status flags, as this is currently the only
 175        * way to know if someone has @'s *and* is +'d.
 176        */
 177       if (IsChanOp(chan))
 178         *(p1++) = '@';
 179       if (HasVoice(chan))
 180         *(p1++) = '+';
 181       if (IsZombie(chan))
 182         *(p1++) = '!';
 183       if (IsDelayedJoin(chan))
 184         *(p1++) = '<';
 185     }
 186     else {
 187       if (IsChanOp(chan))
 188         *(p1++) = '@';
 189       else if (HasVoice(chan))
 190         *(p1++) = '+';
 191       else if (IsZombie(chan))
 192         *(p1++) = '!';
 193       else if (IsDelayedJoin(chan))
 194         *(p1++) = '<';
 195     }
 196     if (IsDeaf(acptr))
 197       *(p1++) = 'd';
 198     if (IsAnOper(sptr))
 199     {
 200       if (IsInvisible(acptr))
 201         *(p1++) = 'i';
 202       if (SendWallops(acptr))
 203         *(p1++) = 'w';
 204       if (SendDebug(acptr))
 205         *(p1++) = 'g';
 206       if (HasSetHost(acptr))
 207         *(p1++) = 'h';
 208     }
 209     if (HasHiddenHost(acptr))
 210       *(p1++) = 'x';
 211   }
 212
 213   if (!fields || (fields & WHO_FIELD_DIS))
 214   {
 215     *p1++ = ' ';
 216     if (!fields)
 217       *p1++ = ':';              /* Place colon here for default reply */
 218     if (feature_bool(FEAT_HIS_WHO_HOPCOUNT) && !IsAnOper(sptr))
 219       *p1++ = (sptr == acptr) ? '0' : '3';
 220     else
 221       /* three digit hopcount maximum */
 222       p1 += ircd_snprintf(0, p1, 3, "%d", cli_hopcount(acptr));
 223   }
 224
 225   if (fields & WHO_FIELD_IDL)
 226   {
 227     *p1++ = ' ';
 228     if (MyUser(acptr) &&
 229         (IsAnOper(sptr) || !feature_bool(FEAT_HIS_WHO_SERVERNAME) ||
 230          acptr == sptr))
 231       p1 += ircd_snprintf(0, p1, 11, "%d",
 232                           CurrentTime - cli_user(acptr)->last);
 233     else
 234       *p1++ = '0';
 235   }
 236
 237   if (fields & WHO_FIELD_ACC)
 238   {
 239     char *p2 = cli_user(acptr)->account;
 240     *(p1++) = ' ';
 241     if (*p2)
 242       while ((*p2) && (*(p1++) = *(p2++)));
 243     else
 244       *(p1++) = '0';
 245   }
 246
 247   if (!fields || (fields & WHO_FIELD_REN))
 248   {
 249     char *p2 = cli_info(acptr);
 250     *p1++ = ' ';
 251     if (fields)
 252       *p1++ = ':';              /* Place colon here for special reply */
 253     while ((*p2) && (*(p1++) = *(p2++)));
 254   }
 255
 256   /* The first char will always be an useless blank and we
 257      need to terminate buf1 */
 258   *p1 = '\0';
 259   p1 = buf1;
 260   send_reply(sptr, fields ? RPL_WHOSPCRPL : RPL_WHOREPLY, ++p1);
 261 }
 262
 263 /** Count number of users who match \a mask.
 264  * @param[in] mask user\@host or user\@ip mask to check.
 265  * @return Count of matching users.
 266  */
 267 int
 268 count_users(char *mask)
 269 {
 270   struct Client *acptr;
 271   int count = 0;
 272   char namebuf[NICKLEN + USERLEN + HOSTLEN + 3];
 273   char ipbuf[USERLEN + 16 + 2];
 274
 275   for (acptr = GlobalClientList; acptr; acptr = cli_next(acptr)) {
 276     if (!IsUser(acptr))
 277       continue;
 278
 279     ircd_snprintf(0, namebuf, sizeof(namebuf), "%s!%s@%s", cli_name(acptr),
 280                   cli_user(acptr)->username, cli_user(acptr)->host);
 281     ircd_snprintf(0, ipbuf, sizeof(ipbuf), "%s!%s@%s", cli_name(acptr),
 282                   cli_user(acptr)->username, ircd_ntoa(&(cli_ip(acptr))));
 283
 284     if (!match(mask, namebuf) || !match(mask, ipbuf))
 285       count++;
 286   }
 287
 288   return count;
 289 }