/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (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
* or http://www.opensolaris.org/os/licensing.
* 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 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_PFMOD_H
#define _SYS_PFMOD_H
#pragma ident "%Z%%M% %I% %E% SMI"
#ifdef __cplusplus
extern "C" {
#endif
/*
* Ioctls.
*/
#define PFIOC ('P' << 8)
#define PFIOCSETF (PFIOC|1) /* replace current packet filter */
#define ENMAXFILTERS 255 /* maximum filter short words */
#define PF_MAXFILTERS 2047 /* max short words for newpacketfilt */
/*
* filter structure for SETF
*/
struct packetfilt {
uchar_t Pf_Priority; /* priority of filter */
uchar_t Pf_FilterLen; /* length of filter cmd list */
ushort_t Pf_Filter[ENMAXFILTERS]; /* filter command list */
};
/*
* The extended packet filter structure
*/
struct Pf_ext_packetfilt {
uchar_t Pf_Priority; /* priority of filter */
unsigned int Pf_FilterLen; /* length of filter cmd list */
ushort_t Pf_Filter[PF_MAXFILTERS]; /* filter command 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.
*
* The filter command list is specified using ioctl(). Each filter command
* list specifies a sequence of actions that leaves a boolean value on the
* top of an internal stack. There is also an offset register which is
* initialized to zero. Each word of the command list specifies an action
* from the set {PUSHLIT, PUSHZERO, PUSHWORD+N, LOAD_OFFSET, BRTR, BRFL, POP}
* (see #defines below for definitions), 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)! */
#define ENF_NBPA 10 /* # bits / action */
#define ENF_NBPO 6 /* # bits / operator */
/* binary operators */
#define ENF_NOP (0 << ENF_NBPA)
#define ENF_EQ (1 << ENF_NBPA)
#define ENF_LT (2 << ENF_NBPA)
#define ENF_LE (3 << ENF_NBPA)
#define ENF_GT (4 << ENF_NBPA)
#define ENF_GE (5 << ENF_NBPA)
#define ENF_AND (6 << ENF_NBPA)
#define ENF_OR (7 << ENF_NBPA)
#define ENF_XOR (8 << ENF_NBPA)
#define ENF_COR (9 << ENF_NBPA)
#define ENF_CAND (10 << ENF_NBPA)
#define ENF_CNOR (11 << ENF_NBPA)
#define ENF_CNAND (12 << ENF_NBPA)
#define ENF_NEQ (13 << ENF_NBPA)
/* stack actions */
#define ENF_NOPUSH 0
#define ENF_PUSHLIT 1 /* Push the next word on the stack */
#define ENF_PUSHZERO 2 /* Push 0 on the stack */
#define ENF_PUSHONE 3 /* Push 1 on the stack */
#define ENF_PUSHFFFF 4 /* Push 0xffff on the stack */
#define ENF_PUSHFF00 5 /* Push 0xff00 on the stack */
#define ENF_PUSH00FF 6 /* Push 0x00ff on the stack */
#define ENF_LOAD_OFFSET 7 /* Load the next word into the offset register */
#define ENF_BRTR 8 /* Branch if the stack's top element is true */
#define ENF_BRFL 9 /* Branch if the stack's top element is false */
#define ENF_POP 10 /* Pop the top element from the stack */
#define ENF_PUSHWORD 16
#ifdef __cplusplus
}
#endif
#endif /* _SYS_PFMOD_H */