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
  25 #include "stdinc.h"
  26 #include "tools.h"
  27 #include "common.h"
  28 #include "channel.h"
  29 #include "client.h"
  30 #include "hash.h"
  31 #include "irc_string.h"
  32 #include "ircd.h"
  33 #include "numeric.h"
  34 #include "send.h"
  35 #include "s_conf.h"
  36 #include "s_serv.h"
  37 #include "msg.h"
  38 #include "parse.h"
  39 #include "modules.h"
  40 #include "packet.h"
  41
  42 static int m_invite(struct Client *, struct Client *, int, const char **);
  43
  44 struct Message invite_msgtab = {
  45         "INVITE", 0, 0, 0, MFLG_SLOW,
  46         {mg_unreg, {m_invite, 3}, {m_invite, 3}, mg_ignore, mg_ignore, {m_invite, 3}}
  47 };
  48 mapi_clist_av1 invite_clist[] = { &invite_msgtab, NULL };
  49 DECLARE_MODULE_AV1(invite, NULL, NULL, invite_clist, NULL, NULL, "$Revision: 26 $");
  50
  51 static void add_invite(struct Channel *, struct Client *);
  52
  53 /* m_invite()
  54  *      parv[0] - sender prefix
  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((target_p = find_person(parv[1])) == NULL)
  70         {
  71                 sendto_one_numeric(source_p, ERR_NOSUCHNICK,
  72                                    form_str(ERR_NOSUCHNICK),
  73                                    IsDigit(parv[1][0]) ? "*" : parv[1]);
  74                 return 0;
  75         }
  76
  77         if(check_channel_name(parv[2]) == 0)
  78         {
  79                 sendto_one_numeric(source_p, ERR_BADCHANNAME,
  80                                    form_str(ERR_BADCHANNAME),
  81                                    parv[2]);
  82                 return 0;
  83         }
  84
  85         if(!IsChannelName(parv[2]))
  86         {
  87                 if(MyClient(source_p))
  88                         sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
  89                                            form_str(ERR_NOSUCHCHANNEL), parv[2]);
  90                 return 0;
  91         }
  92
  93         if((chptr = find_channel(parv[2])) == NULL)
  94         {
  95                 sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
  96                                    form_str(ERR_NOSUCHCHANNEL), parv[2]);
  97                 return 0;
  98         }
  99
 100         msptr = find_channel_membership(chptr, source_p);
 101         if(MyClient(source_p) && (msptr == NULL))
 102         {
 103                 sendto_one_numeric(source_p, ERR_NOTONCHANNEL,
 104                                    form_str(ERR_NOTONCHANNEL), parv[2]);
 105                 return 0;
 106         }
 107
 108         if(IsMember(target_p, chptr))
 109         {
 110                 sendto_one_numeric(source_p, ERR_USERONCHANNEL,
 111                                    form_str(ERR_USERONCHANNEL),
 112                                    target_p->name, parv[2]);
 113                 return 0;
 114         }
 115
 116         /* only store invites for +i channels */
 117         /* if the invite could allow someone to join who otherwise could not,
 118          * unconditionally require ops, unless the channel is +g */
 119         if(ConfigChannel.invite_ops_only || (chptr->mode.mode & MODE_INVITEONLY))
 120         {
 121                 /* treat remote clients as chanops */
 122                 if(MyClient(source_p) && !is_chanop(msptr) &&
 123                                 !(chptr->mode.mode & MODE_FREEINVITE))
 124                 {
 125                         sendto_one(source_p, form_str(ERR_CHANOPRIVSNEEDED),
 126                                    me.name, source_p->name, parv[2]);
 127                         return 0;
 128                 }
 129
 130                 if(chptr->mode.mode & MODE_INVITEONLY)
 131                         store_invite = 1;
 132         }
 133
 134         if(MyConnect(source_p))
 135         {
 136                 sendto_one(source_p, form_str(RPL_INVITING),
 137                            me.name, source_p->name,
 138                            target_p->name, parv[2]);
 139                 if(target_p->user->away)
 140                         sendto_one_numeric(source_p, RPL_AWAY, form_str(RPL_AWAY),
 141                                            target_p->name, target_p->user->away);
 142         }
 143         /* invite timestamp */
 144         else if(parc > 3 && !EmptyString(parv[3]))
 145         {
 146                 /* this should never be less than */
 147                 if(atol(parv[3]) > chptr->channelts)
 148                         return 0;
 149         }
 150
 151         if(MyConnect(target_p))
 152         {
 153                 sendto_one(target_p, ":%s!%s@%s INVITE %s :%s",
 154                            source_p->name, source_p->username, source_p->host,
 155                            target_p->name, chptr->chname);
 156
 157                 if(store_invite)
 158                         add_invite(chptr, target_p);
 159         }
 160         else if(target_p->from != client_p)
 161         {
 162                 sendto_one_prefix(target_p, source_p, "INVITE", "%s %lu",
 163                                   chptr->chname, (unsigned long) chptr->channelts);
 164         }
 165
 166         return 0;
 167 }
 168
 169 /* add_invite()
 170  *
 171  * input        - channel to add invite to, client to add
 172  * output       -
 173  * side effects - client is added to invite list.
 174  */
 175 static void
 176 add_invite(struct Channel *chptr, struct Client *who)
 177 {
 178         dlink_node *ptr;
 179
 180         /* already invited? */
 181         DLINK_FOREACH(ptr, who->user->invited.head)
 182         {
 183                 if(ptr->data == chptr)
 184                         return;
 185         }
 186
 187         /* ok, if their invite list is too long, remove the tail */
 188         if((int)dlink_list_length(&who->user->invited) >=
 189            ConfigChannel.max_chans_per_user)
 190         {
 191                 ptr = who->user->invited.tail;
 192                 del_invite(ptr->data, who);
 193         }
 194
 195         /* add user to channel invite list */
 196         dlinkAddAlloc(who, &chptr->invites);
 197
 198         /* add channel to user invite list */
 199         dlinkAddAlloc(chptr, &who->user->invited);
 200 }
 201
 202