/*- * 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. * * $FreeBSD$ */ #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); #endif /* _NET_BPF_JITTER_H_ */