solanum/modules/um_regonlymsg.c

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/*
* modules/um_regonlymsg.c
* Copyright (c) 2020 Ariadne Conill <ariadne@dereferenced.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "stdinc.h"
#include "modules.h"
#include "hook.h"
#include "client.h"
#include "ircd.h"
#include "send.h"
#include "hash.h"
#include "s_conf.h"
#include "s_user.h"
#include "s_serv.h"
#include "numeric.h"
#include "privilege.h"
#include "s_newconf.h"
#include "logger.h"
static int
um_regonlymsg_modinit(void)
{
user_modes['R'] = find_umode_slot();
construct_umodebuf();
if (!user_modes['R'])
{
ierror("um_regonlymsg: unable to allocate usermode slot for +R, unloading module");
return -1;
}
return 0;
}
static void
um_regonlymsg_moddeinit(void)
{
user_modes['R'] = 0;
construct_umodebuf();
}
#define IsSetRegOnlyMsg(c) ((c->umodes & user_modes['R']) == user_modes['R'])
static const char um_regonlymsg_desc[] =
"Provides usermode +R which restricts messages from unregistered users.";
static bool
allow_message(struct Client *source_p, struct Client *target_p)
{
if (!MyClient(target_p))
return true;
if (!IsSetRegOnlyMsg(target_p))
return true;
if (!IsPerson(source_p))
return true;
/* XXX: controversial? allow opers to send through +R */
if (IsOper(source_p))
return true;
if (accept_message(source_p, target_p))
return true;
if (source_p->user->suser[0])
return true;
return false;
}
static bool
add_callerid_accept_for_source(enum message_type msgtype, struct Client *source_p, struct Client *target_p)
{
if (!MyClient(source_p))
return true;
if(msgtype != MESSAGE_TYPE_NOTICE &&
IsSetRegOnlyMsg(source_p) &&
!accept_message(target_p, source_p) &&
!IsOperGeneral(target_p))
{
if(rb_dlink_list_length(&source_p->localClient->allow_list) <
(unsigned long)ConfigFileEntry.max_accept)
{
rb_dlinkAddAlloc(target_p, &source_p->localClient->allow_list);
rb_dlinkAddAlloc(source_p, &target_p->on_allow_list);
}
else
{
sendto_one_numeric(source_p, ERR_OWNMODE,
form_str(ERR_OWNMODE),
target_p->name, "+R");
return false;
}
}
return true;
}
static void
h_hdl_invite(void *vdata)
{
hook_data_channel_approval *data = vdata;
struct Client *source_p = data->client;
struct Client *target_p = data->target;
static char errorbuf[BUFSIZE];
if (data->approved)
return;
if (!add_callerid_accept_for_source(MESSAGE_TYPE_PRIVMSG, source_p, target_p))
{
data->approved = ERR_NONONREG;
return;
}
if (allow_message(source_p, target_p))
return;
snprintf(errorbuf, sizeof errorbuf, form_str(ERR_NONONREG),
target_p->name);
data->approved = ERR_NONONREG;
data->error = errorbuf;
}
static void
h_hdl_privmsg_user(void *vdata)
{
hook_data_privmsg_user *data = vdata;
struct Client *source_p = data->source_p;
struct Client *target_p = data->target_p;
if (data->approved)
return;
if (!add_callerid_accept_for_source(data->msgtype, source_p, target_p))
{
data->approved = ERR_NONONREG;
return;
}
if (allow_message(source_p, target_p))
return;
if (data->msgtype == MESSAGE_TYPE_NOTICE)
return;
sendto_one_numeric(source_p, ERR_NONONREG, form_str(ERR_NONONREG),
target_p->name);
data->approved = ERR_NONONREG;
}
static mapi_hfn_list_av1 um_regonlymsg_hfnlist[] = {
{ "invite", h_hdl_invite },
{ "privmsg_user", h_hdl_privmsg_user },
{ NULL, NULL }
};
DECLARE_MODULE_AV2(um_regonlymsg, um_regonlymsg_modinit, um_regonlymsg_moddeinit,
NULL, NULL, um_regonlymsg_hfnlist, NULL, NULL, um_regonlymsg_desc);