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