mirror of
https://github.com/NLnetLabs/unbound.git
synced 2025-12-20 23:00:56 -05:00
118 lines
4 KiB
C
118 lines
4 KiB
C
/*
|
|
* util/fptr_wlist.h - function pointer whitelists.
|
|
*
|
|
* Copyright (c) 2007, NLnet Labs. All rights reserved.
|
|
*
|
|
* This software is open source.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
*
|
|
* 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.
|
|
*
|
|
* Neither the name of the NLNET LABS nor the names of its contributors may
|
|
* be used to endorse or promote products derived from this software without
|
|
* specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "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 REGENTS OR CONTRIBUTORS 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.
|
|
*/
|
|
|
|
/**
|
|
* \file
|
|
*
|
|
* This file contains functions that check function pointers.
|
|
* The functions contain a whitelist of known good callback values.
|
|
* Any other values lead to an error.
|
|
*
|
|
* This prevent heap overflow based exploits, where the callback pointer
|
|
* is overwritten by a buffer overflow (apart from this defense, buffer
|
|
* overflows should be fixed of course).
|
|
*
|
|
* Function pointers are used in
|
|
* o network code callbacks.
|
|
* o rbtree, lruhash, region data manipulation
|
|
* o module operations.
|
|
*/
|
|
|
|
#ifndef UTIL_FPTR_WLIST_H
|
|
#define UTIL_FPTR_WLIST_H
|
|
#include "util/netevent.h"
|
|
|
|
/**
|
|
* Check function pointer whitelist for comm_point callback values.
|
|
*
|
|
* @param fptr: function pointer to check.
|
|
* @return false if not in whitelist.
|
|
*/
|
|
int fptr_whitelist_comm_point(comm_point_callback_t *fptr);
|
|
|
|
/**
|
|
* Check function pointer whitelist for comm_timer callback values.
|
|
*
|
|
* @param fptr: function pointer to check.
|
|
* @return false if not in whitelist.
|
|
*/
|
|
int fptr_whitelist_comm_timer(void (*fptr)(void*));
|
|
|
|
/**
|
|
* Check function pointer whitelist for comm_signal callback values.
|
|
*
|
|
* @param fptr: function pointer to check.
|
|
* @return false if not in whitelist.
|
|
*/
|
|
int fptr_whitelist_comm_signal(void (*fptr)(int, void*));
|
|
|
|
/**
|
|
* Check function pointer whitelist for event structure callback values.
|
|
* This is not called by libevent itself, but checked by netevent.
|
|
*
|
|
* @param fptr: function pointer to check.
|
|
* @return false if not in whitelist.
|
|
*/
|
|
int fptr_whitelist_event(void (*fptr)(int, short, void *));
|
|
|
|
/**
|
|
* Check function pointer whitelist for pending udp callback values.
|
|
* This is not called by libevent itself, but checked by netevent.
|
|
*
|
|
* @param fptr: function pointer to check.
|
|
* @return false if not in whitelist.
|
|
*/
|
|
int fptr_whitelist_pending_udp(comm_point_callback_t *fptr);
|
|
|
|
/**
|
|
* Check function pointer whitelist for pending tcp callback values.
|
|
* This is not called by libevent itself, but checked by netevent.
|
|
*
|
|
* @param fptr: function pointer to check.
|
|
* @return false if not in whitelist.
|
|
*/
|
|
int fptr_whitelist_pending_tcp(comm_point_callback_t *fptr);
|
|
|
|
/**
|
|
* Check function pointer whitelist for serviced query callback values.
|
|
* This is not called by libevent itself, but checked by netevent.
|
|
*
|
|
* @param fptr: function pointer to check.
|
|
* @return false if not in whitelist.
|
|
*/
|
|
int fptr_whitelist_serviced_query(comm_point_callback_t *fptr);
|
|
|
|
|
|
#endif /* UTIL_FPTR_WLIST_H */
|