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/* $NetBSD: bpf.h,v 1.50 2009/01/13 19:10:52 christos Exp $ */
/*
* Copyright (c) 1990, 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from the Stanford/CMU enet packet filter,
* (net/enet.c) distributed as part of 4.3BSD, and code contributed
* to Berkeley by Steven McCanne and Van Jacobson both of Lawrence
* Berkeley Laboratory.
*
* 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 University 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 REGENTS 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.
*
* @(#)bpf.h 8.2 (Berkeley) 1/9/95
* @(#) Header: bpf.h,v 1.36 97/06/12 14:29:53 leres Exp (LBL)
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _NET_BPF_H_
#define _NET_BPF_H_
#include <sys/time.h>
#include <sys/types32.h>
#include <sys/ioccom.h>
/* BSD style release date */
#define BPF_RELEASE 199606
typedef int bpf_int32;
typedef uint_t bpf_uint_t32;
typedef uint_t bpf_u_int32;
/*
* Alignment macros. BPF_WORDALIGN rounds up to the next
* even multiple of BPF_ALIGNMENT.
*/
#define BPF_ALIGNMENT sizeof (uint32_t)
#define BPF_WORDALIGN(x) (((x)+(BPF_ALIGNMENT-1))&~(BPF_ALIGNMENT-1))
#define BPF_MAXINSNS 512
#define BPF_DFLTBUFSIZE (1024*1024) /* default static upper limit */
#define BPF_MAXBUFSIZE (1024*1024*16) /* hard limit on sysctl'able value */
#define BPF_MINBUFSIZE 32
/*
* Structure for BIOCSETF.
*/
struct bpf_program {
uint_t bf_len;
struct bpf_insn *bf_insns;
};
struct bpf_program32 {
uint_t bf_len;
caddr32_t bf_insns;
};
/*
* Struct returned by BIOCGSTATS and net.bpf.stats sysctl.
*/
struct bpf_stat {
uint64_t bs_recv; /* number of packets received */
uint64_t bs_drop; /* number of packets dropped */
uint64_t bs_capt; /* number of packets captured */
uint64_t bs_padding[13];
};
/*
* Struct returned by BIOCGSTATSOLD.
*/
struct bpf_stat_old {
uint_t bs_recv; /* number of packets received */
uint_t bs_drop; /* number of packets dropped */
};
/*
* Struct return by BIOCVERSION. This represents the version number of
* the filter language described by the instruction encodings below.
* bpf understands a program iff kernel_major == filter_major &&
* kernel_minor >= filter_minor, that is, if the value returned by the
* running kernel has the same major number and a minor number equal
* equal to or less than the filter being downloaded. Otherwise, the
* results are undefined, meaning an error may be returned or packets
* may be accepted haphazardly.
* It has nothing to do with the source code version.
*/
struct bpf_version {
ushort_t bv_major;
ushort_t bv_minor;
};
/* Current version number of filter architecture. */
#define BPF_MAJOR_VERSION 1
#define BPF_MINOR_VERSION 1
/*
* BPF ioctls
*
* The first set is for compatibility with Sun's pcc style
* header files. If your using gcc, we assume that you
* have run fixincludes so the latter set should work.
*/
#define BIOCGBLEN _IOR('B', 102, uint_t)
#define BIOCSBLEN _IOWR('B', 102, uint_t)
#define BIOCSETF _IOW('B', 103, struct bpf_program)
#define BIOCFLUSH _IO('B', 104)
#define BIOCPROMISC _IO('B', 105)
#define BIOCGDLT _IOR('B', 106, uint_t)
#define BIOCGETIF _IOR('B', 107, struct ifreq)
#define BIOCGETLIF _IOR('B', 107, struct lifreq)
#define BIOCSETIF _IOW('B', 108, struct ifreq)
#define BIOCSETLIF _IOW('B', 108, struct lifreq)
#define BIOCGSTATS _IOR('B', 111, struct bpf_stat)
#define BIOCGSTATSOLD _IOR('B', 111, struct bpf_stat_old)
#define BIOCIMMEDIATE _IOW('B', 112, uint_t)
#define BIOCVERSION _IOR('B', 113, struct bpf_version)
#define BIOCSTCPF _IOW('B', 114, struct bpf_program)
#define BIOCSUDPF _IOW('B', 115, struct bpf_program)
#define BIOCGHDRCMPLT _IOR('B', 116, uint_t)
#define BIOCSHDRCMPLT _IOW('B', 117, uint_t)
#define BIOCSDLT _IOW('B', 118, uint_t)
#define BIOCGDLTLIST _IOWR('B', 119, struct bpf_dltlist)
#define BIOCGSEESENT _IOR('B', 120, uint_t)
#define BIOCSSEESENT _IOW('B', 121, uint_t)
#define BIOCSRTIMEOUT _IOW('B', 122, struct timeval)
#define BIOCGRTIMEOUT _IOR('B', 123, struct timeval)
/*
*/
#define BIOCSETF32 _IOW('B', 103, struct bpf_program32)
#define BIOCGDLTLIST32 _IOWR('B', 119, struct bpf_dltlist32)
#define BIOCSRTIMEOUT32 _IOW('B', 122, struct timeval32)
#define BIOCGRTIMEOUT32 _IOR('B', 123, struct timeval32)
/*
* Structure prepended to each packet. This is "wire" format, so we
* cannot change it unfortunately to 64 bit times on 32 bit systems [yet].
*/
struct bpf_timeval {
int32_t tv_sec;
int32_t tv_usec;
};
struct bpf_hdr {
struct bpf_timeval bh_tstamp; /* time stamp */
uint32_t bh_caplen; /* length of captured portion */
uint32_t bh_datalen; /* original length of packet */
uint16_t bh_hdrlen; /* length of bpf header (this struct */
/* plus alignment padding) */
};
/*
* Because the structure above is not a multiple of 4 bytes, some compilers
* will insist on inserting padding; hence, sizeof(struct bpf_hdr) won't work.
* Only the kernel needs to know about it; applications use bh_hdrlen.
* XXX To save a few bytes on 32-bit machines, we avoid end-of-struct
* XXX padding by using the size of the header data elements. This is
* XXX fail-safe: on new machines, we just use the 'safe' sizeof.
*/
#ifdef _KERNEL
#if defined(__arm32__) || defined(__i386__) || defined(__m68k__) || \
defined(__mips__) || defined(__ns32k__) || defined(__vax__) || \
defined(__sh__) || (defined(__sparc__) && !defined(__sparc64__))
#define SIZEOF_BPF_HDR 18
#else
#define SIZEOF_BPF_HDR sizeof (struct bpf_hdr)
#endif
#endif
/* Pull in data-link level type codes. */
#include <net/dlt.h>
/*
* The instruction encodings.
*/
/* instruction classes */
#define BPF_CLASS(code) ((code) & 0x07)
#define BPF_LD 0x00
#define BPF_LDX 0x01
#define BPF_ST 0x02
#define BPF_STX 0x03
#define BPF_ALU 0x04
#define BPF_JMP 0x05
#define BPF_RET 0x06
#define BPF_MISC 0x07
/* ld/ldx fields */
#define BPF_SIZE(code) ((code) & 0x18)
#define BPF_W 0x00
#define BPF_H 0x08
#define BPF_B 0x10
#define BPF_MODE(code) ((code) & 0xe0)
#define BPF_IMM 0x00
#define BPF_ABS 0x20
#define BPF_IND 0x40
#define BPF_MEM 0x60
#define BPF_LEN 0x80
#define BPF_MSH 0xa0
/* alu/jmp fields */
#define BPF_OP(code) ((code) & 0xf0)
#define BPF_ADD 0x00
#define BPF_SUB 0x10
#define BPF_MUL 0x20
#define BPF_DIV 0x30
#define BPF_OR 0x40
#define BPF_AND 0x50
#define BPF_LSH 0x60
#define BPF_RSH 0x70
#define BPF_NEG 0x80
#define BPF_JA 0x00
#define BPF_JEQ 0x10
#define BPF_JGT 0x20
#define BPF_JGE 0x30
#define BPF_JSET 0x40
#define BPF_SRC(code) ((code) & 0x08)
#define BPF_K 0x00
#define BPF_X 0x08
/* ret - BPF_K and BPF_X also apply */
#define BPF_RVAL(code) ((code) & 0x18)
#define BPF_A 0x10
/* misc */
#define BPF_MISCOP(code) ((code) & 0xf8)
#define BPF_TAX 0x00
#define BPF_TXA 0x80
/*
* The instruction data structure.
*/
struct bpf_insn {
uint16_t code;
uint8_t jt;
uint8_t jf;
uint32_t k;
};
/*
* Macros for insn array initializers.
*/
#define BPF_STMT(code, k) { (uint16_t)(code), 0, 0, k }
#define BPF_JUMP(code, k, jt, jf) { (uint16_t)(code), jt, jf, k }
/*
* Structure to retrieve available DLTs for the interface.
*/
struct bpf_dltlist {
uint_t bfl_len; /* number of bfd_list array */
uint_t *bfl_list; /* array of DLTs */
};
struct bpf_dltlist32 {
uint_t bfl_len;
caddr32_t bfl_list;
};
#ifdef _KERNEL
#include <sys/mac.h>
#include <sys/dls_impl.h>
typedef void (*bpf_itap_fn_t)(void *, mblk_t *, boolean_t, uint_t);
extern void bpfattach(uintptr_t, int, zoneid_t, int);
extern void bpfdetach(uintptr_t);
extern uint_t bpf_filter(struct bpf_insn *, uchar_t *, uint_t, uint_t);
extern void bpf_itap(void *, mblk_t *, boolean_t, uint_t);
extern void bpf_mtap(void *, mac_resource_handle_t, mblk_t *, boolean_t);
extern int bpf_validate(struct bpf_insn *, int);
#endif /* _KERNEL */
/*
* Number of scratch memory words (for BPF_LD|BPF_MEM and BPF_ST).
*/
#define BPF_MEMWORDS 16
#endif /* !_NET_BPF_H_ */
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