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 718 2006-02-08 20:26:58Z 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: 718 $");
  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                 sendto_one_numeric(source_p, ERR_NOSUCHNICK,
  74                                    form_str(ERR_NOSUCHNICK),
  75                                    IsDigit(parv[1][0]) ? "*" : parv[1]);
  76                 return 0;
  77         }
  78
  79         if(check_channel_name(parv[2]) == 0)
  80         {
  81                 sendto_one_numeric(source_p, ERR_BADCHANNAME,
  82                                    form_str(ERR_BADCHANNAME),
  83                                    parv[2]);
  84                 return 0;
  85         }
  86
  87         if(!IsChannelName(parv[2]))
  88         {
  89                 if(MyClient(source_p))
  90                         sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
  91                                            form_str(ERR_NOSUCHCHANNEL), parv[2]);
  92                 return 0;
  93         }
  94
  95         /* Do not send local channel invites to users if they are not on the
  96          * same server as the person sending the INVITE message.
  97          */
  98         if(parv[2][0] == '&' && !MyConnect(target_p))
  99         {
 100                 sendto_one(source_p, form_str(ERR_USERNOTONSERV),
 101                            me.name, source_p->name, target_p->name);
 102                 return 0;
 103         }
 104
 105         if((chptr = find_channel(parv[2])) == NULL)
 106         {
 107                 sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
 108                                    form_str(ERR_NOSUCHCHANNEL), parv[2]);
 109                 return 0;
 110         }
 111
 112         msptr = find_channel_membership(chptr, source_p);
 113         if(MyClient(source_p) && (msptr == NULL))
 114         {
 115                 sendto_one_numeric(source_p, ERR_NOTONCHANNEL,
 116                                    form_str(ERR_NOTONCHANNEL), parv[2]);
 117                 return 0;
 118         }
 119
 120         if(IsMember(target_p, chptr))
 121         {
 122                 sendto_one_numeric(source_p, ERR_USERONCHANNEL,
 123                                    form_str(ERR_USERONCHANNEL),
 124                                    target_p->name, parv[2]);
 125                 return 0;
 126         }
 127
 128         /* only store invites for +i channels */
 129         /* if the invite could allow someone to join who otherwise could not,
 130          * unconditionally require ops, unless the channel is +g */
 131         if(ConfigChannel.invite_ops_only || (chptr->mode.mode & MODE_INVITEONLY))
 132         {
 133                 /* treat remote clients as chanops */
 134                 if(MyClient(source_p) && !is_chanop(msptr) &&
 135                                 !(chptr->mode.mode & MODE_FREEINVITE))
 136                 {
 137                         sendto_one(source_p, form_str(ERR_CHANOPRIVSNEEDED),
 138                                    me.name, source_p->name, parv[2]);
 139                         return 0;
 140                 }
 141
 142                 if(chptr->mode.mode & MODE_INVITEONLY)
 143                         store_invite = 1;
 144         }
 145
 146         if(MyConnect(source_p))
 147         {
 148                 sendto_one(source_p, form_str(RPL_INVITING),
 149                            me.name, source_p->name,
 150                            target_p->name, parv[2]);
 151                 if(target_p->user->away)
 152                         sendto_one_numeric(source_p, RPL_AWAY, form_str(RPL_AWAY),
 153                                            target_p->name, target_p->user->away);
 154         }
 155         /* invite timestamp */
 156         else if(parc > 3 && !EmptyString(parv[3]))
 157         {
 158                 /* this should never be less than */
 159                 if(atol(parv[3]) > chptr->channelts)
 160                         return 0;
 161         }
 162
 163         if(MyConnect(target_p))
 164         {
 165                 sendto_one(target_p, ":%s!%s@%s INVITE %s :%s",
 166                            source_p->name, source_p->username, source_p->host,
 167                            target_p->name, chptr->chname);
 168
 169                 if(store_invite)
 170                         add_invite(chptr, target_p);
 171         }
 172         else if(target_p->from != client_p)
 173         {
 174                 sendto_one_prefix(target_p, source_p, "INVITE", "%s %lu",
 175                                   chptr->chname, (unsigned long) chptr->channelts);
 176         }
 177
 178         return 0;
 179 }
 180
 181 /* add_invite()
 182  *
 183  * input        - channel to add invite to, client to add
 184  * output       -
 185  * side effects - client is added to invite list.
 186  */
 187 static void
 188 add_invite(struct Channel *chptr, struct Client *who)
 189 {
 190         dlink_node *ptr;
 191
 192         /* already invited? */
 193         DLINK_FOREACH(ptr, who->user->invited.head)
 194         {
 195                 if(ptr->data == chptr)
 196                         return;
 197         }
 198
 199         /* ok, if their invite list is too long, remove the tail */
 200         if((int)dlink_list_length(&who->user->invited) >=
 201            ConfigChannel.max_chans_per_user)
 202         {
 203                 ptr = who->user->invited.tail;
 204                 del_invite(ptr->data, who);
 205         }
 206
 207         /* add user to channel invite list */
 208         dlinkAddAlloc(who, &chptr->invites);
 209
 210         /* add channel to user invite list */
 211         dlinkAddAlloc(chptr, &who->user->invited);
 212 }
 213
 214