mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
synced 2024-11-22 11:14:18 +01:00
91 lines
3.3 KiB
C
91 lines
3.3 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*
|
|
* Copyright (C) 2002-2003 NetGroup, Politecnico di Torino (Italy)
|
|
* Copyright (C) 2005-2009 Jung-uk Kim <jkim@FreeBSD.org>
|
|
* All rights reserved.
|
|
*
|
|
* 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. Neither the name of the Politecnico di Torino 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 COPYRIGHT
|
|
* OWNER 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.
|
|
*/
|
|
|
|
#ifndef _NET_BPF_JITTER_H_
|
|
#define _NET_BPF_JITTER_H_
|
|
|
|
#ifdef _KERNEL
|
|
MALLOC_DECLARE(M_BPFJIT);
|
|
#endif
|
|
|
|
extern int bpf_jitter_enable;
|
|
|
|
/*
|
|
* Prototype of a filtering function created by the jitter.
|
|
*
|
|
* The syntax and the meaning of the parameters is analogous to the one of
|
|
* bpf_filter(). Notice that the filter is not among the parameters because
|
|
* it is hardwired in the function.
|
|
*/
|
|
typedef u_int (*bpf_filter_func)(u_char *, u_int, u_int);
|
|
|
|
/* Structure describing a native filtering program created by the jitter. */
|
|
typedef struct bpf_jit_filter {
|
|
/* The native filtering binary, in the form of a bpf_filter_func. */
|
|
bpf_filter_func func;
|
|
size_t size;
|
|
} bpf_jit_filter;
|
|
|
|
/*
|
|
* BPF jitter, builds a machine function from a BPF program.
|
|
*
|
|
* param fp The BPF pseudo-assembly filter that will be translated
|
|
* into native code.
|
|
* param nins Number of instructions of the input filter.
|
|
* return The bpf_jit_filter structure containing the native filtering
|
|
* binary.
|
|
*
|
|
* bpf_jitter allocates the buffers for the new native filter and
|
|
* then translates the program pointed by fp calling bpf_jit_compile().
|
|
*/
|
|
bpf_jit_filter *bpf_jitter(struct bpf_insn *fp, int nins);
|
|
|
|
/*
|
|
* Deletes a filtering function that was previously created by bpf_jitter().
|
|
*
|
|
* param filter The filter to destroy.
|
|
*
|
|
* This function frees the variuos buffers (code, memory, etc.) associated
|
|
* with a filtering function.
|
|
*/
|
|
void bpf_destroy_jit_filter(bpf_jit_filter *filter);
|
|
|
|
/*
|
|
* Declarations for machine-dependent functions.
|
|
*/
|
|
struct bpf_insn;
|
|
|
|
bpf_filter_func bpf_jit_compile(struct bpf_insn *, u_int, size_t *);
|
|
|
|
#endif /* _NET_BPF_JITTER_H_ */
|