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(MyClient(source_p))
  72                 target_p = find_named_person(parv[1]);
  73         else
  74                 target_p = find_person(parv[1]);
  75         if(target_p == NULL)
  76         {
  77                 if(!MyClient(source_p) && IsDigit(parv[1][0]))
  78                         sendto_one_numeric(source_p, ERR_NOSUCHNICK,
  79                                            "* :Target left IRC. Failed to invite to %s",
  80                                            parv[2]);
  81                 else
  82                         sendto_one_numeric(source_p, ERR_NOSUCHNICK,
  83                                            form_str(ERR_NOSUCHNICK),
  84                                            parv[1]);
  85                 return 0;
  86         }
  87
  88         if(check_channel_name(parv[2]) == 0)
  89         {
  90                 sendto_one_numeric(source_p, ERR_BADCHANNAME,
  91                                    form_str(ERR_BADCHANNAME),
  92                                    parv[2]);
  93                 return 0;
  94         }
  95
  96         if(!IsChannelName(parv[2]))
  97         {
  98                 if(MyClient(source_p))
  99                         sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
 100                                            form_str(ERR_NOSUCHCHANNEL), parv[2]);
 101                 return 0;
 102         }
 103
 104         /* Do not send local channel invites to users if they are not on the
 105          * same server as the person sending the INVITE message.
 106          */
 107         if(parv[2][0] == '&' && !MyConnect(target_p))
 108         {
 109                 sendto_one(source_p, form_str(ERR_USERNOTONSERV),
 110                            me.name, source_p->name, target_p->name);
 111                 return 0;
 112         }
 113
 114         if((chptr = find_channel(parv[2])) == NULL)
 115         {
 116                 sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
 117                                    form_str(ERR_NOSUCHCHANNEL), parv[2]);
 118                 return 0;
 119         }
 120
 121         msptr = find_channel_membership(chptr, source_p);
 122         if(MyClient(source_p) && (msptr == NULL))
 123         {
 124                 sendto_one_numeric(source_p, ERR_NOTONCHANNEL,
 125                                    form_str(ERR_NOTONCHANNEL), parv[2]);
 126                 return 0;
 127         }
 128
 129         if(IsMember(target_p, chptr))
 130         {
 131                 sendto_one_numeric(source_p, ERR_USERONCHANNEL,
 132                                    form_str(ERR_USERONCHANNEL),
 133                                    target_p->name, parv[2]);
 134                 return 0;
 135         }
 136
 137         /* unconditionally require ops, unless the channel is +g */
 138         /* treat remote clients as chanops */
 139         if(MyClient(source_p) && !is_chanop(msptr) &&
 140                         !(chptr->mode.mode & MODE_FREEINVITE))
 141         {
 142                 sendto_one(source_p, form_str(ERR_CHANOPRIVSNEEDED),
 143                            me.name, source_p->name, parv[2]);
 144                 return 0;
 145         }
 146
 147         /* store invites when they could affect the ability to join
 148          * for +l/+j just check if the mode is set, this varies over time
 149          */
 150         if(chptr->mode.mode & MODE_INVITEONLY ||
 151                         (chptr->mode.mode & MODE_REGONLY && EmptyString(target_p->user->suser)) ||
 152                         chptr->mode.limit || chptr->mode.join_num)
 153                 store_invite = 1;
 154
 155         if(MyConnect(source_p))
 156         {
 157                 sendto_one(source_p, form_str(RPL_INVITING),
 158                            me.name, source_p->name,
 159                            target_p->name, parv[2]);
 160                 if(target_p->user->away)
 161                         sendto_one_numeric(source_p, RPL_AWAY, form_str(RPL_AWAY),
 162                                            target_p->name, target_p->user->away);
 163         }
 164         /* invite timestamp */
 165         else if(parc > 3 && !EmptyString(parv[3]))
 166         {
 167                 /* this should never be less than */
 168                 if(atol(parv[3]) > chptr->channelts)
 169                         return 0;
 170         }
 171
 172         if(MyConnect(target_p))
 173         {
 174                 sendto_one(target_p, ":%s!%s@%s INVITE %s :%s",
 175                            source_p->name, source_p->username, source_p->host,
 176                            target_p->name, chptr->chname);
 177
 178                 if(store_invite)
 179                         add_invite(chptr, target_p);
 180         }
 181         else if(target_p->from != client_p)
 182         {
 183                 sendto_one_prefix(target_p, source_p, "INVITE", "%s %lu",
 184                                   chptr->chname, (unsigned long) chptr->channelts);
 185         }
 186
 187         return 0;
 188 }
 189
 190 /* add_invite()
 191  *
 192  * input        - channel to add invite to, client to add
 193  * output       -
 194  * side effects - client is added to invite list.
 195  */
 196 static void
 197 add_invite(struct Channel *chptr, struct Client *who)
 198 {
 199         rb_dlink_node *ptr;
 200
 201         /* already invited? */
 202         RB_DLINK_FOREACH(ptr, who->user->invited.head)
 203         {
 204                 if(ptr->data == chptr)
 205                         return;
 206         }
 207
 208         /* ok, if their invite list is too long, remove the tail */
 209         if((int)rb_dlink_list_length(&who->user->invited) >=
 210            ConfigChannel.max_chans_per_user)
 211         {
 212                 ptr = who->user->invited.tail;
 213                 del_invite(ptr->data, who);
 214         }
 215
 216         /* add user to channel invite list */
 217         dlinkAddAlloc(who, &chptr->invites);
 218
 219         /* add channel to user invite list */
 220         dlinkAddAlloc(chptr, &who->user->invited);
 221 }
 222
 223