modules/m_list_ratbox.c

   1 /*
   2  *  ircd-ratbox: A slightly useful ircd.
   3  *  m_list.c: Shows what servers are currently connected.
   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 "tools.h"
  27 #include "channel.h"
  28 #include "client.h"
  29 #include "hash.h"
  30 #include "irc_string.h"
  31 #include "ircd.h"
  32 #include "numeric.h"
  33 #include "s_conf.h"
  34 #include "s_serv.h"
  35 #include "send.h"
  36 #include "msg.h"
  37 #include "parse.h"
  38 #include "modules.h"
  39 #include "linebuf.h"
  40
  41 static int m_list(struct Client *, struct Client *, int, const char **);
  42 static int mo_list(struct Client *, struct Client *, int, const char **);
  43
  44 struct Message list_msgtab = {
  45         "LIST", 0, 0, 0, MFLG_SLOW,
  46         {mg_unreg, {m_list, 0}, mg_ignore, mg_ignore, mg_ignore, {mo_list, 0}}
  47 };
  48
  49 mapi_clist_av1 list_clist[] = { &list_msgtab, NULL };
  50 DECLARE_MODULE_AV1(list, NULL, NULL, list_clist, NULL, NULL, "$Revision: 26 $");
  51
  52 static void list_all_channels(struct Client *source_p);
  53 static void list_limit_channels(struct Client *source_p, const char *param);
  54 static void list_named_channel(struct Client *source_p, const char *name);
  55
  56 /* m_list()
  57  *      parv[0] = sender prefix
  58  *      parv[1] = channel
  59  */
  60 static int
  61 m_list(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  62 {
  63         static time_t last_used = 0L;
  64
  65         /* pace this due to the sheer traffic involved */
  66         if(((last_used + ConfigFileEntry.pace_wait) > CurrentTime))
  67         {
  68                 sendto_one(source_p, form_str(RPL_LOAD2HI),
  69                            me.name, source_p->name, "LIST");
  70                 sendto_one(source_p, form_str(RPL_LISTEND), me.name, source_p->name);
  71                 return 0;
  72         }
  73         else
  74                 last_used = CurrentTime;
  75
  76         /* If no arg, do all channels *whee*, else just one channel */
  77         if(parc < 2 || EmptyString(parv[1]))
  78                 list_all_channels(source_p);
  79         else if(IsChannelName(parv[1]))
  80                 list_named_channel(source_p, parv[1]);
  81         else
  82                 list_limit_channels(source_p, parv[1]);
  83
  84         return 0;
  85 }
  86
  87 /* mo_list()
  88  *      parv[0] = sender prefix
  89  *      parv[1] = channel
  90  */
  91 static int
  92 mo_list(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  93 {
  94         /* If no arg, do all channels *whee*, else just one channel */
  95         if(parc < 2 || EmptyString(parv[1]))
  96                 list_all_channels(source_p);
  97         else if(IsChannelName(parv[1]))
  98                 list_named_channel(source_p, parv[1]);
  99         else
 100                 list_limit_channels(source_p, parv[1]);
 101
 102         return 0;
 103 }
 104
 105 /* list_all_channels()
 106  *
 107  * inputs       - pointer to client requesting list
 108  * output       -
 109  * side effects - list all channels to source_p
 110  */
 111 static void
 112 list_all_channels(struct Client *source_p)
 113 {
 114         struct Channel *chptr;
 115         dlink_node *ptr;
 116         int sendq_limit;
 117
 118         /* give them an output limit of 90% of their sendq. --fl */
 119         sendq_limit = (int) get_sendq(source_p);
 120         sendq_limit /= 10;
 121         sendq_limit *= 9;
 122
 123         sendto_one(source_p, form_str(RPL_LISTSTART), me.name, source_p->name);
 124
 125         DLINK_FOREACH(ptr, global_channel_list.head)
 126         {
 127                 chptr = ptr->data;
 128
 129                 /* if theyre overflowing their sendq, stop. --fl */
 130                 if(linebuf_len(&source_p->localClient->buf_sendq) > sendq_limit)
 131                 {
 132                         sendto_one(source_p, form_str(ERR_TOOMANYMATCHES),
 133                                    me.name, source_p->name, "LIST");
 134                         break;
 135                 }
 136
 137                 if(SecretChannel(chptr) && !IsMember(source_p, chptr))
 138                         continue;
 139
 140                 sendto_one(source_p, form_str(RPL_LIST),
 141                            me.name, source_p->name, chptr->chname,
 142                            dlink_list_length(&chptr->members),
 143                            chptr->topic == NULL ? "" : chptr->topic);
 144         }
 145
 146         sendto_one(source_p, form_str(RPL_LISTEND), me.name, source_p->name);
 147         return;
 148 }
 149
 150 static void
 151 list_limit_channels(struct Client *source_p, const char *param)
 152 {
 153         struct Channel *chptr;
 154         char *args;
 155         char *p;
 156         dlink_node *ptr;
 157         unsigned int sendq_limit;
 158         int max = INT_MAX;
 159         int min = 0;
 160         int i;
 161
 162         args = LOCAL_COPY(param);
 163
 164         for(i = 0; i < 2; i++)
 165         {
 166                 if((p = strchr(args, ',')) != NULL)
 167                         *p++ = '\0';
 168
 169                 if(*args == '<')
 170                 {
 171                         args++;
 172                         if((max = atoi(args)) <= 0)
 173                                 max = INT_MAX;
 174                 }
 175                 else if(*args == '>')
 176                 {
 177                         args++;
 178                         if((min = atoi(args)) < 0)
 179                                 min = 0;
 180                 }
 181
 182                 if(EmptyString(p))
 183                         break;
 184                 else
 185                         args = p;
 186         }
 187
 188         /* give them an output limit of 90% of their sendq. --fl */
 189         sendq_limit = (unsigned int) get_sendq(source_p);
 190         sendq_limit /= 10;
 191         sendq_limit *= 9;
 192
 193         sendto_one(source_p, form_str(RPL_LISTSTART), me.name, source_p->name);
 194
 195         DLINK_FOREACH(ptr, global_channel_list.head)
 196         {
 197                 chptr = ptr->data;
 198
 199                 /* if theyre overflowing their sendq, stop. --fl */
 200                 if(linebuf_len(&source_p->localClient->buf_sendq) > sendq_limit)
 201                 {
 202                         sendto_one(source_p, form_str(ERR_TOOMANYMATCHES),
 203                                    me.name, source_p->name, "LIST");
 204                         break;
 205                 }
 206
 207                 if(dlink_list_length(&chptr->members) >= max ||
 208                    dlink_list_length(&chptr->members) <= min)
 209                         continue;
 210
 211                 if(SecretChannel(chptr) && !IsMember(source_p, chptr))
 212                         continue;
 213
 214                 sendto_one(source_p, form_str(RPL_LIST),
 215                            me.name, source_p->name, chptr->chname,
 216                            dlink_list_length(&chptr->members),
 217                            chptr->topic == NULL ? "" : chptr->topic);
 218         }
 219
 220         sendto_one(source_p, form_str(RPL_LISTEND), me.name, source_p->name);
 221         return;
 222 }
 223
 224
 225 /* list_named_channel()
 226  *
 227  * inputs       - pointer to client requesting list
 228  * output       -
 229  * side effects - list single channel to source
 230  */
 231 static void
 232 list_named_channel(struct Client *source_p, const char *name)
 233 {
 234         struct Channel *chptr;
 235         char *p;
 236         char *n = LOCAL_COPY(name);
 237
 238         sendto_one(source_p, form_str(RPL_LISTSTART), me.name, source_p->name);
 239
 240         if((p = strchr(n, ',')))
 241                 *p = '\0';
 242
 243         if(*n == '\0')
 244         {
 245                 sendto_one_numeric(source_p, ERR_NOSUCHNICK,
 246                                    form_str(ERR_NOSUCHNICK), name);
 247                 sendto_one(source_p, form_str(RPL_LISTEND), me.name, source_p->name);
 248                 return;
 249         }
 250
 251         chptr = find_channel(n);
 252
 253         if(chptr == NULL)
 254         {
 255                 sendto_one_numeric(source_p, ERR_NOSUCHNICK,
 256                                    form_str(ERR_NOSUCHNICK), n);
 257                 sendto_one(source_p, form_str(RPL_LISTEND), me.name, source_p->name);
 258                 return;
 259         }
 260
 261         if(ShowChannel(source_p, chptr))
 262                 sendto_one(source_p, form_str(RPL_LIST),
 263                            me.name, source_p->name, chptr->chname,
 264                            dlink_list_length(&chptr->members),
 265                            chptr->topic == NULL ? "" : chptr->topic);
 266
 267         sendto_one(source_p, form_str(RPL_LISTEND), me.name, source_p->name);
 268         return;
 269 }