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 "channel.h"
  27 #include "client.h"
  28 #include "hash.h"
  29 #include "match.h"
  30 #include "ircd.h"
  31 #include "numeric.h"
  32 #include "send.h"
  33 #include "s_conf.h"
  34 #include "s_serv.h"
  35 #include "msg.h"
  36 #include "parse.h"
  37 #include "modules.h"
  38 #include "packet.h"
  39 #include "tgchange.h"
  40
  41 static const char invite_desc[] = "Provides facilities for invite and related notifications";
  42
  43 static void m_invite(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  44 static unsigned int CAP_INVITE_NOTIFY = 0;
  45
  46 struct Message invite_msgtab = {
  47         "INVITE", 0, 0, 0, 0,
  48         {mg_unreg, {m_invite, 3}, {m_invite, 3}, mg_ignore, mg_ignore, {m_invite, 3}}
  49 };
  50
  51 mapi_clist_av1 invite_clist[] = { &invite_msgtab, NULL };
  52
  53 mapi_cap_list_av2 invite_cap_list[] = {
  54         { MAPI_CAP_CLIENT, "invite-notify", NULL, &CAP_INVITE_NOTIFY },
  55         { 0, NULL, NULL, NULL }
  56 };
  57
  58 DECLARE_MODULE_AV2(invite, NULL, NULL, invite_clist, NULL, NULL, invite_cap_list, NULL, invite_desc);
  59
  60 static bool add_invite(struct Channel *, struct Client *);
  61
  62 /* m_invite()
  63  *      parv[1] - user to invite
  64  *      parv[2] - channel name
  65  */
  66 static void
  67 m_invite(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  68 {
  69         struct Client *target_p;
  70         struct Channel *chptr;
  71         struct membership *msptr;
  72         int store_invite = 0;
  73
  74         if(MyClient(source_p) && !IsFloodDone(source_p))
  75                 flood_endgrace(source_p);
  76
  77         if(MyClient(source_p))
  78                 target_p = find_named_person(parv[1]);
  79         else
  80                 target_p = find_person(parv[1]);
  81         if(target_p == NULL)
  82         {
  83                 if(!MyClient(source_p) && IsDigit(parv[1][0]))
  84                         sendto_one_numeric(source_p, ERR_NOSUCHNICK,
  85                                            "* :Target left IRC. Failed to invite to %s",
  86                                            parv[2]);
  87                 else
  88                         sendto_one_numeric(source_p, ERR_NOSUCHNICK,
  89                                            form_str(ERR_NOSUCHNICK),
  90                                            parv[1]);
  91                 return;
  92         }
  93
  94         if(check_channel_name(parv[2]) == 0)
  95         {
  96                 sendto_one_numeric(source_p, ERR_BADCHANNAME,
  97                                    form_str(ERR_BADCHANNAME),
  98                                    parv[2]);
  99                 return;
 100         }
 101
 102         /* Do not send local channel invites to users if they are not on the
 103          * same server as the person sending the INVITE message.
 104          */
 105         if(parv[2][0] == '&' && !MyConnect(target_p))
 106         {
 107                 sendto_one(source_p, form_str(ERR_USERNOTONSERV),
 108                            me.name, source_p->name, target_p->name);
 109                 return;
 110         }
 111
 112         if(((MyConnect(source_p) && !IsExemptResv(source_p)) ||
 113                         (MyConnect(target_p) && !IsExemptResv(target_p))) &&
 114                 hash_find_resv(parv[2]))
 115         {
 116                 sendto_one_numeric(source_p, ERR_BADCHANNAME,
 117                                    form_str(ERR_BADCHANNAME),
 118                                    parv[2]);
 119                 return;
 120         }
 121
 122         if((chptr = find_channel(parv[2])) == NULL)
 123         {
 124                 sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
 125                                    form_str(ERR_NOSUCHCHANNEL), parv[2]);
 126                 return;
 127         }
 128
 129         msptr = find_channel_membership(chptr, source_p);
 130         if(MyClient(source_p) && (msptr == NULL))
 131         {
 132                 sendto_one_numeric(source_p, ERR_NOTONCHANNEL,
 133                                    form_str(ERR_NOTONCHANNEL), parv[2]);
 134                 return;
 135         }
 136
 137         if(IsMember(target_p, chptr))
 138         {
 139                 sendto_one_numeric(source_p, ERR_USERONCHANNEL,
 140                                    form_str(ERR_USERONCHANNEL),
 141                                    target_p->name, parv[2]);
 142                 return;
 143         }
 144
 145         /* unconditionally require ops, unless the channel is +g */
 146         /* treat remote clients as chanops */
 147         if(MyClient(source_p) && !is_chanop(msptr) &&
 148                         !(chptr->mode.mode & MODE_FREEINVITE))
 149         {
 150                 sendto_one(source_p, form_str(ERR_CHANOPRIVSNEEDED),
 151                            me.name, source_p->name, parv[2]);
 152                 return;
 153         }
 154
 155         /* store invites when they could affect the ability to join
 156          * for +l/+j just check if the mode is set, this varies over time
 157          */
 158         if(chptr->mode.mode & MODE_INVITEONLY ||
 159                         (chptr->mode.mode & MODE_REGONLY && EmptyString(target_p->user->suser)) ||
 160                         chptr->mode.limit || chptr->mode.join_num)
 161                 store_invite = 1;
 162
 163         if(MyConnect(source_p))
 164         {
 165                 if (ConfigFileEntry.target_change && !IsOper(source_p) &&
 166                                 !find_allowing_channel(source_p, target_p) &&
 167                                 !add_target(source_p, target_p))
 168                 {
 169                         sendto_one(source_p, form_str(ERR_TARGCHANGE),
 170                                    me.name, source_p->name, target_p->name);
 171                         return;
 172                 }
 173                 sendto_one(source_p, form_str(RPL_INVITING),
 174                            me.name, source_p->name,
 175                            target_p->name, parv[2]);
 176                 if(target_p->user->away)
 177                         sendto_one_numeric(source_p, RPL_AWAY, form_str(RPL_AWAY),
 178                                            target_p->name, target_p->user->away);
 179         }
 180         /* invite timestamp */
 181         else if(parc > 3 && !EmptyString(parv[3]))
 182         {
 183                 /* this should never be less than */
 184                 if(atol(parv[3]) > chptr->channelts)
 185                         return;
 186         }
 187
 188         if(MyConnect(target_p))
 189         {
 190                 if(!IsOper(source_p) && (IsSetCallerId(target_p) ||
 191                                         (IsSetRegOnlyMsg(target_p) && !source_p->user->suser[0])) &&
 192                                 !accept_message(source_p, target_p))
 193                 {
 194                         if (IsSetRegOnlyMsg(target_p) && !source_p->user->suser[0])
 195                         {
 196                                 sendto_one_numeric(source_p, ERR_NONONREG,
 197                                                 form_str(ERR_NONONREG),
 198                                                 target_p->name);
 199                                 return;
 200                         }
 201                         else
 202                         {
 203                                 /* instead of sending RPL_UMODEGMSG,
 204                                  * just let the invite through
 205                                  */
 206                                 if((target_p->localClient->last_caller_id_time +
 207                                     ConfigFileEntry.caller_id_wait) >= rb_current_time())
 208                                 {
 209                                         sendto_one_numeric(source_p, ERR_TARGUMODEG,
 210                                                            form_str(ERR_TARGUMODEG),
 211                                                            target_p->name);
 212                                         return;
 213                                 }
 214                                 target_p->localClient->last_caller_id_time = rb_current_time();
 215                         }
 216                 }
 217                 add_reply_target(target_p, source_p);
 218                 sendto_one(target_p, ":%s!%s@%s INVITE %s :%s",
 219                            source_p->name, source_p->username, source_p->host,
 220                            target_p->name, chptr->chname);
 221
 222                 if(store_invite)
 223                 {
 224                         if (!add_invite(chptr, target_p))
 225                                 return;
 226
 227                         sendto_channel_local_with_capability(source_p, CHFL_CHANOP, 0, CAP_INVITE_NOTIFY, chptr,
 228                                 ":%s NOTICE %s :%s is inviting %s to %s.",
 229                                 me.name, chptr->chname, source_p->name, target_p->name, chptr->chname);
 230                         sendto_channel_local_with_capability(source_p, CHFL_CHANOP, CAP_INVITE_NOTIFY, 0, chptr,
 231                                 ":%s!%s@%s INVITE %s %s", source_p->name, source_p->username,
 232                                 source_p->host, target_p->name, chptr->chname);
 233                 }
 234         }
 235
 236         sendto_server(source_p, chptr, CAP_TS6, 0, ":%s INVITE %s %s %lu",
 237                       use_id(source_p), use_id(target_p),
 238                       chptr->chname, (unsigned long) chptr->channelts);
 239 }
 240
 241 /* add_invite()
 242  *
 243  * input        - channel to add invite to, client to add
 244  * output       - true if it is a new invite, else false
 245  * side effects - client is added to invite list.
 246  */
 247 static bool
 248 add_invite(struct Channel *chptr, struct Client *who)
 249 {
 250         rb_dlink_node *ptr;
 251
 252         /* already invited? */
 253         RB_DLINK_FOREACH(ptr, who->user->invited.head)
 254         {
 255                 if(ptr->data == chptr)
 256                         return false;
 257         }
 258
 259         /* ok, if their invite list is too long, remove the tail */
 260         if((int)rb_dlink_list_length(&who->user->invited) >=
 261            ConfigChannel.max_chans_per_user)
 262         {
 263                 ptr = who->user->invited.tail;
 264                 del_invite(ptr->data, who);
 265         }
 266
 267         /* add user to channel invite list */
 268         rb_dlinkAddAlloc(who, &chptr->invites);
 269
 270         /* add channel to user invite list */
 271         rb_dlinkAddAlloc(chptr, &who->user->invited);
 272
 273         return true;
 274 }