modules/m_invite.c

   1 /*
   2  *  ircd-ratbox: A slightly useful ircd.
   3  *  m_invite.c: Invites the user to join a channel.
   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  *  $Id: m_invite.c 3438 2007-05-06 14:46:45Z jilles $
  25  */
  26
  27 #include "stdinc.h"
  28 #include "common.h"
  29 #include "channel.h"
  30 #include "client.h"
  31 #include "hash.h"
  32 #include "match.h"
  33 #include "ircd.h"
  34 #include "numeric.h"
  35 #include "send.h"
  36 #include "s_conf.h"
  37 #include "s_serv.h"
  38 #include "msg.h"
  39 #include "parse.h"
  40 #include "modules.h"
  41 #include "packet.h"
  42
  43 static int m_invite(struct Client *, struct Client *, int, const char **);
  44
  45 struct Message invite_msgtab = {
  46         "INVITE", 0, 0, 0, MFLG_SLOW,
  47         {mg_unreg, {m_invite, 3}, {m_invite, 3}, mg_ignore, mg_ignore, {m_invite, 3}}
  48 };
  49 mapi_clist_av1 invite_clist[] = { &invite_msgtab, NULL };
  50 DECLARE_MODULE_AV1(invite, NULL, NULL, invite_clist, NULL, NULL, "$Revision: 3438 $");
  51
  52 static void add_invite(struct Channel *, struct Client *);
  53
  54 /* m_invite()
  55  *      parv[1] - user to invite
  56  *      parv[2] - channel name
  57  */
  58 static int
  59 m_invite(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  60 {
  61         struct Client *target_p;
  62         struct Channel *chptr;
  63         struct membership *msptr;
  64         int store_invite = 0;
  65
  66         if(MyClient(source_p) && !IsFloodDone(source_p))
  67                 flood_endgrace(source_p);
  68
  69         if(MyClient(source_p))
  70                 target_p = find_named_person(parv[1]);
  71         else
  72                 target_p = find_person(parv[1]);
  73         if(target_p == NULL)
  74         {
  75                 if(!MyClient(source_p) && IsDigit(parv[1][0]))
  76                         sendto_one_numeric(source_p, ERR_NOSUCHNICK,
  77                                            "* :Target left IRC. Failed to invite to %s",
  78                                            parv[2]);
  79                 else
  80                         sendto_one_numeric(source_p, ERR_NOSUCHNICK,
  81                                            form_str(ERR_NOSUCHNICK),
  82                                            parv[1]);
  83                 return 0;
  84         }
  85
  86         if(check_channel_name(parv[2]) == 0)
  87         {
  88                 sendto_one_numeric(source_p, ERR_BADCHANNAME,
  89                                    form_str(ERR_BADCHANNAME),
  90                                    parv[2]);
  91                 return 0;
  92         }
  93
  94         if(!IsChannelName(parv[2]))
  95         {
  96                 if(MyClient(source_p))
  97                         sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
  98                                            form_str(ERR_NOSUCHCHANNEL), parv[2]);
  99                 return 0;
 100         }
 101
 102         /* Do not send local channel invites to users if they are not on the
 103          * same server as the person sending the INVITE message.
 104          */
 105         if(parv[2][0] == '&' && !MyConnect(target_p))
 106         {
 107                 sendto_one(source_p, form_str(ERR_USERNOTONSERV),
 108                            me.name, source_p->name, target_p->name);
 109                 return 0;
 110         }
 111
 112         if((chptr = find_channel(parv[2])) == NULL)
 113         {
 114                 sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
 115                                    form_str(ERR_NOSUCHCHANNEL), parv[2]);
 116                 return 0;
 117         }
 118
 119         msptr = find_channel_membership(chptr, source_p);
 120         if(MyClient(source_p) && (msptr == NULL))
 121         {
 122                 sendto_one_numeric(source_p, ERR_NOTONCHANNEL,
 123                                    form_str(ERR_NOTONCHANNEL), parv[2]);
 124                 return 0;
 125         }
 126
 127         if(IsMember(target_p, chptr))
 128         {
 129                 sendto_one_numeric(source_p, ERR_USERONCHANNEL,
 130                                    form_str(ERR_USERONCHANNEL),
 131                                    target_p->name, parv[2]);
 132                 return 0;
 133         }
 134
 135         /* unconditionally require ops, unless the channel is +g */
 136         /* treat remote clients as chanops */
 137         if(MyClient(source_p) && !is_chanop(msptr) &&
 138                         !(chptr->mode.mode & MODE_FREEINVITE))
 139         {
 140                 sendto_one(source_p, form_str(ERR_CHANOPRIVSNEEDED),
 141                            me.name, source_p->name, parv[2]);
 142                 return 0;
 143         }
 144
 145         /* store invites when they could affect the ability to join
 146          * for +l/+j just check if the mode is set, this varies over time
 147          */
 148         if(chptr->mode.mode & MODE_INVITEONLY ||
 149                         (chptr->mode.mode & MODE_REGONLY && EmptyString(target_p->user->suser)) ||
 150                         chptr->mode.limit || chptr->mode.join_num)
 151                 store_invite = 1;
 152
 153         if(MyConnect(source_p))
 154         {
 155                 sendto_one(source_p, form_str(RPL_INVITING),
 156                            me.name, source_p->name,
 157                            target_p->name, parv[2]);
 158                 if(target_p->user->away)
 159                         sendto_one_numeric(source_p, RPL_AWAY, form_str(RPL_AWAY),
 160                                            target_p->name, target_p->user->away);
 161         }
 162         /* invite timestamp */
 163         else if(parc > 3 && !EmptyString(parv[3]))
 164         {
 165                 /* this should never be less than */
 166                 if(atol(parv[3]) > chptr->channelts)
 167                         return 0;
 168         }
 169
 170         if(MyConnect(target_p))
 171         {
 172                 sendto_one(target_p, ":%s!%s@%s INVITE %s :%s",
 173                            source_p->name, source_p->username, source_p->host,
 174                            target_p->name, chptr->chname);
 175
 176                 if(store_invite)
 177                         add_invite(chptr, target_p);
 178         }
 179         else if(target_p->from != client_p)
 180         {
 181                 sendto_one_prefix(target_p, source_p, "INVITE", "%s %lu",
 182                                   chptr->chname, (unsigned long) chptr->channelts);
 183         }
 184
 185         return 0;
 186 }
 187
 188 /* add_invite()
 189  *
 190  * input        - channel to add invite to, client to add
 191  * output       -
 192  * side effects - client is added to invite list.
 193  */
 194 static void
 195 add_invite(struct Channel *chptr, struct Client *who)
 196 {
 197         rb_dlink_node *ptr;
 198
 199         /* already invited? */
 200         RB_DLINK_FOREACH(ptr, who->user->invited.head)
 201         {
 202                 if(ptr->data == chptr)
 203                         return;
 204         }
 205
 206         /* ok, if their invite list is too long, remove the tail */
 207         if((int)rb_dlink_list_length(&who->user->invited) >=
 208            ConfigChannel.max_chans_per_user)
 209         {
 210                 ptr = who->user->invited.tail;
 211                 del_invite(ptr->data, who);
 212         }
 213
 214         /* add user to channel invite list */
 215         rb_dlinkAddAlloc(who, &chptr->invites);
 216
 217         /* add channel to user invite list */
 218         rb_dlinkAddAlloc(chptr, &who->user->invited);
 219 }
 220
 221