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