extensions/chm_nonotice.c

   1 /*
   2  * Solanum: a slightly advanced ircd
   3  * chm_nonotice: block NOTICEs (+T mode).
   4  *
   5  * Copyright (c) 2012 Ariadne Conill <ariadne@dereferenced.org>
   6  *
   7  * Permission to use, copy, modify, and/or distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice is present in all copies.
  10  *
  11  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  12  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  13  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  14  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
  15  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  16  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  17  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  18  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  19  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  20  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  21  * POSSIBILITY OF SUCH DAMAGE.
  22  */
  23
  24 #include "stdinc.h"
  25 #include "modules.h"
  26 #include "hook.h"
  27 #include "client.h"
  28 #include "ircd.h"
  29 #include "send.h"
  30 #include "s_conf.h"
  31 #include "s_user.h"
  32 #include "s_serv.h"
  33 #include "numeric.h"
  34 #include "chmode.h"
  35 #include "messages.h"
  36 #include "inline/stringops.h"
  37
  38 static const char chm_nonotice_desc[] =
  39         "Adds channel mode +T which blocks notices to the channel.";
  40
  41 static unsigned int mode_nonotice;
  42
  43 static void chm_nonotice_process(void *);
  44
  45 mapi_hfn_list_av1 chm_nonotice_hfnlist[] = {
  46         { "privmsg_channel", chm_nonotice_process },
  47         { NULL, NULL }
  48 };
  49
  50 static void
  51 chm_nonotice_process(void *data_)
  52 {
  53         hook_data_privmsg_channel *data = data_;
  54
  55         /*
  56          * don't waste CPU if message is already blocked, only block notices,
  57          * only check messages sourced from local clients (so we don't block services notices)
  58          */
  59         if (data->approved || data->msgtype != MESSAGE_TYPE_NOTICE || !MyClient(data->source_p))
  60                 return;
  61
  62         /* block all notices except CTCPs; use chm_noctcp to block CTCPs. */
  63         if (data->chptr->mode.mode & mode_nonotice && *data->text != '\001')
  64         {
  65                 sendto_one_numeric(data->source_p, ERR_CANNOTSENDTOCHAN, form_str(ERR_CANNOTSENDTOCHAN), data->chptr->chname);
  66                 data->approved = ERR_CANNOTSENDTOCHAN;
  67                 return;
  68         }
  69 }
  70
  71 static int
  72 _modinit(void)
  73 {
  74         mode_nonotice = cflag_add('T', chm_simple);
  75         if (mode_nonotice == 0)
  76                 return -1;
  77
  78         return 0;
  79 }
  80
  81 static void
  82 _moddeinit(void)
  83 {
  84         cflag_orphan('T');
  85 }
  86
  87 DECLARE_MODULE_AV2(chm_nonotice, _modinit, _moddeinit, NULL, NULL, chm_nonotice_hfnlist, NULL, NULL, chm_nonotice_desc);