modules/chm_noctcp.c

   1 /*
   2  * Solanum: a slightly advanced ircd
   3  * chm_noctcp: block non-action CTCP (+C 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 "inline/stringops.h"
  36
  37 static const char chm_noctcp_desc[] =
  38         "Adds channel mode +C, which blocks CTCP messages from a channel (except ACTION)";
  39
  40 static unsigned int mode_noctcp;
  41
  42 static void chm_noctcp_process(hook_data_privmsg_channel *);
  43
  44 mapi_hfn_list_av1 chm_noctcp_hfnlist[] = {
  45         { "privmsg_channel", (hookfn) chm_noctcp_process },
  46         { NULL, NULL }
  47 };
  48
  49 static void
  50 chm_noctcp_process(hook_data_privmsg_channel *data)
  51 {
  52         /* don't waste CPU if message is already blocked */
  53         if (data->approved || data->msgtype == MESSAGE_TYPE_NOTICE)
  54                 return;
  55
  56         if (*data->text == '\001' && rb_strncasecmp(data->text + 1, "ACTION ", 7) && data->chptr->mode.mode & mode_noctcp)
  57         {
  58                 sendto_one_numeric(data->source_p, ERR_CANNOTSENDTOCHAN, form_str(ERR_CANNOTSENDTOCHAN), data->chptr->chname);
  59                 data->approved = ERR_CANNOTSENDTOCHAN;
  60                 return;
  61         }
  62         else if (rb_dlink_list_length(&data->chptr->locmembers) > (unsigned)(GlobalSetOptions.floodcount / 2))
  63                 data->source_p->large_ctcp_sent = rb_current_time();
  64 }
  65
  66 static int
  67 _modinit(void)
  68 {
  69         mode_noctcp = cflag_add('C', chm_simple);
  70         if (mode_noctcp == 0)
  71                 return -1;
  72
  73         return 0;
  74 }
  75
  76 static void
  77 _moddeinit(void)
  78 {
  79         cflag_orphan('C');
  80 }
  81
  82 DECLARE_MODULE_AV2(chm_noctcp, _modinit, _moddeinit, NULL, NULL, chm_noctcp_hfnlist, NULL, NULL, chm_noctcp_desc);