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
  26 #include "stdinc.h"
  27 #include "common.h"
  28 #include "channel.h"
  29 #include "client.h"
  30 #include "hash.h"
  31 #include "match.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 #include "tgchange.h"
  42 #include "channel.h"
  43
  44 struct module_modes ModuleModes;
  45
  46 static int m_invite(struct Client *, struct Client *, int, const char **);
  47
  48 struct Message invite_msgtab = {
  49         "INVITE", 0, 0, 0, MFLG_SLOW,
  50         {mg_unreg, {m_invite, 3}, {m_invite, 3}, mg_ignore, mg_ignore, {m_invite, 3}}
  51 };
  52 mapi_clist_av1 invite_clist[] = { &invite_msgtab, NULL };
  53 DECLARE_MODULE_AV1(invite, NULL, NULL, invite_clist, NULL, NULL, "$Revision: 3438 $");
  54
  55 static void add_invite(struct Channel *, struct Client *);
  56
  57 /* m_invite()
  58  *      parv[1] - user to invite
  59  *      parv[2] - channel name
  60  */
  61 static int
  62 m_invite(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  63 {
  64         struct Client *target_p;
  65         struct Channel *chptr;
  66         struct membership *msptr;
  67         int store_invite = 0;
  68
  69         if(MyClient(source_p) && !IsFloodDone(source_p))
  70                 flood_endgrace(source_p);
  71
  72         if(MyClient(source_p))
  73                 target_p = find_named_person(parv[1]);
  74         else
  75                 target_p = find_person(parv[1]);
  76         if(target_p == NULL)
  77         {
  78                 if(!MyClient(source_p) && IsDigit(parv[1][0]))
  79                         sendto_one_numeric(source_p, ERR_NOSUCHNICK,
  80                                            "* :Target left IRC. Failed to invite to %s",
  81                                            parv[2]);
  82                 else
  83                         sendto_one_numeric(source_p, ERR_NOSUCHNICK,
  84                                            form_str(ERR_NOSUCHNICK),
  85                                            parv[1]);
  86                 return 0;
  87         }
  88
  89         if(check_channel_name(parv[2]) == 0)
  90         {
  91                 sendto_one_numeric(source_p, ERR_BADCHANNAME,
  92                                    form_str(ERR_BADCHANNAME),
  93                                    parv[2]);
  94                 return 0;
  95         }
  96
  97         if(!IsChannelName(parv[2]))
  98         {
  99                 if(MyClient(source_p))
 100                         sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
 101                                            form_str(ERR_NOSUCHCHANNEL), parv[2]);
 102                 return 0;
 103         }
 104
 105         /* Do not send local channel invites to users if they are not on the
 106          * same server as the person sending the INVITE message.
 107          */
 108         if(parv[2][0] == '&' && !MyConnect(target_p))
 109         {
 110                 sendto_one(source_p, form_str(ERR_USERNOTONSERV),
 111                            me.name, source_p->name, target_p->name);
 112                 return 0;
 113         }
 114
 115         if(((MyConnect(source_p) && !IsExemptResv(source_p)) ||
 116                         (MyConnect(target_p) && !IsExemptResv(target_p))) &&
 117                 hash_find_resv(parv[2]))
 118         {
 119                 sendto_one_numeric(source_p, ERR_BADCHANNAME,
 120                                    form_str(ERR_BADCHANNAME),
 121                                    parv[2]);
 122                 return 0;
 123         }
 124
 125         if((chptr = find_channel(parv[2])) == NULL)
 126         {
 127                 sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
 128                                    form_str(ERR_NOSUCHCHANNEL), parv[2]);
 129                 return 0;
 130         }
 131
 132         msptr = find_channel_membership(chptr, source_p);
 133         if(MyClient(source_p) && (msptr == NULL))
 134         {
 135                 sendto_one_numeric(source_p, ERR_NOTONCHANNEL,
 136                                    form_str(ERR_NOTONCHANNEL), parv[2]);
 137                 return 0;
 138         }
 139
 140         if(IsMember(target_p, chptr))
 141         {
 142                 sendto_one_numeric(source_p, ERR_USERONCHANNEL,
 143                                    form_str(ERR_USERONCHANNEL),
 144                                    target_p->name, parv[2]);
 145                 return 0;
 146         }
 147
 148         /* unconditionally require ops, unless the channel is +g */
 149         /* treat remote clients as chanops */
 150         if(MyClient(source_p) && !is_any_op(msptr) &&
 151                         !(chptr->mode.mode & ModuleModes.MODE_FREEINVITE))
 152         {
 153                 if(IsOverride(source_p))
 154                 {
 155                         sendto_wallops_flags(UMODE_WALLOP, &me,
 156                                         "%s is overriding INVITE [%s] on [%s]",
 157                                         get_oper_name(source_p), target_p->name, chptr->chname);
 158                         sendto_server(NULL, chptr, NOCAPS, NOCAPS,
 159                                         ":%s WALLOPS :%s is overriding INVITE [%s] on [%s]",
 160                                         me.name, get_oper_name(source_p), target_p->name, chptr->chname);
 161                 }
 162                 else
 163                 {
 164                         sendto_one(source_p, form_str(ERR_CHANOPRIVSNEEDED),
 165                                         me.name, source_p->name, parv[2]);
 166                         return 0;
 167                 }
 168         }
 169
 170         if (IsSetNoInvite(target_p))
 171         {
 172                 sendto_one_numeric(source_p, ERR_NOINVITE,
 173                                 form_str(ERR_NOINVITE),
 174                                 target_p->name);
 175                 return 0;
 176         }
 177
 178         /* store invites when they could affect the ability to join
 179          * for +l/+j just check if the mode is set, this varies over time
 180          */
 181         if(chptr->mode.mode & MODE_INVITEONLY ||
 182                         (chptr->mode.mode & ModuleModes.MODE_REGONLY && EmptyString(target_p->user->suser)) ||
 183                         chptr->mode.limit || chptr->mode.join_num)
 184                 store_invite = 1;
 185
 186         if(MyConnect(source_p))
 187         {
 188                 if (ConfigFileEntry.target_change && !IsOper(source_p) &&
 189                                 !find_allowing_channel(source_p, target_p) &&
 190                                 !add_target(source_p, target_p))
 191                 {
 192                         sendto_one(source_p, form_str(ERR_TARGCHANGE),
 193                                    me.name, source_p->name, target_p->name);
 194                         return 0;
 195                 }
 196                 sendto_one(source_p, form_str(RPL_INVITING),
 197                            me.name, source_p->name,
 198                            target_p->name, parv[2]);
 199                 if(target_p->user->away)
 200                         sendto_one_numeric(source_p, RPL_AWAY, form_str(RPL_AWAY),
 201                                            target_p->name, target_p->user->away);
 202         }
 203         /* invite timestamp */
 204         else if(parc > 3 && !EmptyString(parv[3]))
 205         {
 206                 /* this should never be less than */
 207                 if(atol(parv[3]) > chptr->channelts)
 208                         return 0;
 209         }
 210
 211         if(MyConnect(target_p))
 212         {
 213                 if(!IsOper(source_p) && (IsSetCallerId(target_p) ||
 214                                         (IsSetRegOnlyMsg(target_p) && !source_p->user->suser[0])) &&
 215                                 !accept_message(source_p, target_p))
 216                 {
 217                         if (IsSetRegOnlyMsg(target_p) && !source_p->user->suser[0])
 218                         {
 219                                 sendto_one_numeric(source_p, ERR_NONONREG,
 220                                                 form_str(ERR_NONONREG),
 221                                                 target_p->name);
 222                                 return 0;
 223                         }
 224                         else
 225                         {
 226                                 /* instead of sending RPL_UMODEGMSG,
 227                                  * just let the invite through
 228                                  */
 229                                 if((target_p->localClient->last_caller_id_time +
 230                                     ConfigFileEntry.caller_id_wait) >= rb_current_time())
 231                                 {
 232                                         sendto_one_numeric(source_p, ERR_TARGUMODEG,
 233                                                            form_str(ERR_TARGUMODEG),
 234                                                            target_p->name);
 235                                         return 0;
 236                                 }
 237                                 target_p->localClient->last_caller_id_time = rb_current_time();
 238                         }
 239                 }
 240                 add_reply_target(target_p, source_p);
 241                 sendto_one(target_p, ":%s!%s@%s INVITE %s :%s",
 242                            source_p->name, source_p->username, source_p->host,
 243                            target_p->name, chptr->chname);
 244
 245                 if(store_invite)
 246                         add_invite(chptr, target_p);
 247         }
 248         else if(target_p->from != client_p)
 249         {
 250                 sendto_one_prefix(target_p, source_p, "INVITE", "%s %lu",
 251                                   chptr->chname, (unsigned long) chptr->channelts);
 252         }
 253
 254         return 0;
 255 }
 256
 257 /* add_invite()
 258  *
 259  * input        - channel to add invite to, client to add
 260  * output       -
 261  * side effects - client is added to invite list.
 262  */
 263 static void
 264 add_invite(struct Channel *chptr, struct Client *who)
 265 {
 266         rb_dlink_node *ptr;
 267
 268         /* already invited? */
 269         RB_DLINK_FOREACH(ptr, who->user->invited.head)
 270         {
 271                 if(ptr->data == chptr)
 272                         return;
 273         }
 274
 275         /* ok, if their invite list is too long, remove the tail */
 276         if((int)rb_dlink_list_length(&who->user->invited) >=
 277            ConfigChannel.max_chans_per_user)
 278         {
 279                 ptr = who->user->invited.tail;
 280                 del_invite(ptr->data, who);
 281         }
 282
 283         /* add user to channel invite list */
 284         rb_dlinkAddAlloc(who, &chptr->invites);
 285
 286         /* add channel to user invite list */
 287         rb_dlinkAddAlloc(chptr, &who->user->invited);
 288 }
 289
 290