modules/m_names.c

   1 /*
   2  *  ircd-ratbox: A slightly useful ircd.
   3  *  m_names.c: Shows the users who are online.
   4  *
   5  *  Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
   6  *  Copyright (C) 1996-2002 Hybrid Development Team
   7  *  Copyright (C) 2002-2005 ircd-ratbox development team
   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 2 of the License, or
  12  *  (at your option) 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307
  22  *  USA
  23  */
  24
  25 #include "stdinc.h"
  26 #include "channel.h"
  27 #include "client.h"
  28 #include "hash.h"
  29 #include "match.h"
  30 #include "ircd.h"
  31 #include "numeric.h"
  32 #include "send.h"
  33 #include "s_serv.h"
  34 #include "s_conf.h"
  35 #include "msg.h"
  36 #include "parse.h"
  37 #include "modules.h"
  38
  39 static const char names_desc[] = "Provides the NAMES command to view users on a channel";
  40
  41 static void m_names(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  42
  43 struct Message names_msgtab = {
  44         "NAMES", 0, 0, 0, 0,
  45         {mg_unreg, {m_names, 0}, mg_ignore, mg_ignore, mg_ignore, {m_names, 0}}
  46 };
  47
  48 mapi_clist_av1 names_clist[] = { &names_msgtab, NULL };
  49
  50 DECLARE_MODULE_AV2(names, NULL, NULL, names_clist, NULL, NULL, NULL, NULL, names_desc);
  51
  52 static void names_global(struct Client *source_p);
  53
  54 /************************************************************************
  55  * m_names() - Added by Jto 27 Apr 1989
  56  ************************************************************************/
  57
  58 /*
  59  * m_names
  60  *      parv[1] = channel
  61  */
  62 static void
  63 m_names(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  64 {
  65         static time_t last_used = 0;
  66         struct Channel *chptr = NULL;
  67         char *s;
  68
  69         if(parc > 1 && !EmptyString(parv[1]))
  70         {
  71                 char *p = LOCAL_COPY(parv[1]);
  72                 if((s = strchr(p, ',')))
  73                         *s = '\0';
  74
  75                 if(!check_channel_name(p))
  76                 {
  77                         sendto_one_numeric(source_p, ERR_BADCHANNAME,
  78                                            form_str(ERR_BADCHANNAME),
  79                                            (unsigned char *) p);
  80                         return;
  81                 }
  82
  83                 if((chptr = find_channel(p)) != NULL)
  84                         channel_member_names(chptr, source_p, 1);
  85                 else
  86                         sendto_one(source_p, form_str(RPL_ENDOFNAMES),
  87                                    me.name, source_p->name, p);
  88         }
  89         else
  90         {
  91                 if(!IsOper(source_p))
  92                 {
  93                         if((last_used + ConfigFileEntry.pace_wait) > rb_current_time())
  94                         {
  95                                 sendto_one(source_p, form_str(RPL_LOAD2HI),
  96                                            me.name, source_p->name, "NAMES");
  97                                 sendto_one(source_p, form_str(RPL_ENDOFNAMES),
  98                                            me.name, source_p->name, "*");
  99                                 return;
 100                         }
 101                         else
 102                                 last_used = rb_current_time();
 103                 }
 104
 105                 names_global(source_p);
 106                 sendto_one(source_p, form_str(RPL_ENDOFNAMES),
 107                            me.name, source_p->name, "*");
 108         }
 109 }
 110
 111 /*
 112  * names_global
 113  *
 114  * inputs       - pointer to client struct requesting names
 115  * output       - none
 116  * side effects - lists all non public non secret channels
 117  */
 118 static void
 119 names_global(struct Client *source_p)
 120 {
 121         int mlen;
 122         int tlen;
 123         int cur_len;
 124         bool dont_show = false;
 125         rb_dlink_node *lp, *ptr;
 126         struct Client *target_p;
 127         struct Channel *chptr = NULL;
 128         struct membership *msptr;
 129         char buf[BUFSIZE];
 130         char *t;
 131
 132         /* first do all visible channels */
 133         RB_DLINK_FOREACH(ptr, global_channel_list.head)
 134         {
 135                 chptr = ptr->data;
 136                 channel_member_names(chptr, source_p, 0);
 137         }
 138         cur_len = mlen = sprintf(buf, form_str(RPL_NAMREPLY),
 139                                     me.name, source_p->name, "*", "*");
 140         t = buf + mlen;
 141
 142         /* Second, do all clients in one big sweep */
 143         RB_DLINK_FOREACH(ptr, global_client_list.head)
 144         {
 145                 target_p = ptr->data;
 146                 dont_show = false;
 147
 148                 if(!IsPerson(target_p) || IsInvisible(target_p))
 149                         continue;
 150
 151                 /* we want to show -i clients that are either:
 152                  *   a) not on any channels
 153                  *   b) only on +p channels
 154                  *
 155                  * both were missed out above.  if the target is on a
 156                  * common channel with source, its already been shown.
 157                  */
 158                 RB_DLINK_FOREACH(lp, target_p->user->channel.head)
 159                 {
 160                         msptr = lp->data;
 161                         chptr = msptr->chptr;
 162
 163                         if(PubChannel(chptr) || IsMember(source_p, chptr) ||
 164                            SecretChannel(chptr))
 165                         {
 166                                 dont_show = true;
 167                                 break;
 168                         }
 169                 }
 170
 171                 if(dont_show)
 172                         continue;
 173
 174                 if((cur_len + NICKLEN + 2) > (BUFSIZE - 3))
 175                 {
 176                         sendto_one(source_p, "%s", buf);
 177                         cur_len = mlen;
 178                         t = buf + mlen;
 179                 }
 180
 181                 tlen = sprintf(t, "%s ", target_p->name);
 182                 cur_len += tlen;
 183                 t += tlen;
 184         }
 185
 186         if(cur_len > mlen)
 187                 sendto_one(source_p, "%s", buf);
 188 }