pfmod.h revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1991,1997-1998 by Sun Microsystems, Inc.
* All rights reserved.
*/
#ifndef _SYS_PFMOD_H
#define _SYS_PFMOD_H
#pragma ident "%Z%%M% %I% %E% SMI"
#ifdef __cplusplus
extern "C" {
#endif
/*
* Ioctls.
*/
/*
* filter structure for SETF
*/
struct packetfilt {
};
/*
* The extended packet filter structure
*/
struct Pf_ext_packetfilt {
unsigned int Pf_FilterLen; /* length of filter cmd list */
};
/*
* We now allow specification of up to MAXFILTERS (short) words of a filter
* command list to be applied to incoming packets to determine if
* those packets should be given to a particular open ethernet file.
* Alternatively, PF_MAXFILTERS and Pf_ext_packetfilt structure can be
* used in case even bigger filter command list is needed.
*
* In this context, "word" means a short (16-bit) integer.
*
* Each open enet file specifies the filter command list via ioctl.
* Each filter command list specifies a sequence of actions that leaves a
* boolean value on the top of an internal stack. Each word of the
* command list specifies an action from the set {PUSHLIT, PUSHZERO,
* PUSHWORD+N} which respectively push the next word of the filter, zero,
* or word N of the incoming packet on the stack, and a binary operator
* from the set {EQ, LT, LE, GT, GE, AND, OR, XOR} which operates on the
* top two elements of the stack and replaces them with its result. The
* special action NOPUSH and the special operator NOP can be used to only
* perform the binary operation or to only push a value on the stack.
*
* If the final value of the filter operation is true, then the packet is
* accepted for the open file which specified the filter.
*/
/* these must sum to sizeof (ushort_t)! */
/* binary operators */
/* stack actions */
#define ENF_NOPUSH 0
#define ENF_PUSHLIT 1
#define ENF_PUSHZERO 2
#define ENF_PUSHONE 3
#define ENF_PUSHFFFF 4
#define ENF_PUSHFF00 5
#define ENF_PUSH00FF 6
#define ENF_PUSHWORD 16
#ifdef __cplusplus
}
#endif
#endif /* _SYS_PFMOD_H */