bpf.h
资源名称:ixp425BSP.rar [点击查看]
上传用户:luoyougen
上传日期:2008-05-12
资源大小:23136k
文件大小:8k
源码类别:
VxWorks
开发平台:
C/C++
- /* bpf.h - Berkeley Packet Filter (BPF) definitions and structures */
- /* Copyright 1999 - 2002 Wind River Systems, Inc. */
- #include "copyright_wrs.h"
- /*-
- * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
- * 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. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. 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 7.1 (Berkeley) 5/7/91
- *
- * @(#) $Header: bpf.h,v 1.36 97/06/12 14:29:53 leres Exp $ (LBL)
- */
- /*
- modification history
- --------------------
- 01c,28apr02,rae added extern C jazz (SPR #76303)
- 01b,05apr00,spm added interface to temporarily suspend filtering
- 01a,24nov99,spm created from BSD bpf.c,v 1.67 96/09/26 22:00:52
- */
- #ifndef BPF_MAJOR_VERSION
- #ifdef __cplusplus
- extern "C" {
- #endif
- #include "vxWorks.h"
- #include "sys/times.h"
- #include "net/if.h"
- /* BSD style release date */
- #define BPF_RELEASE 199606
- typedef int bpf_int32;
- typedef u_int bpf_u_int32;
- /*
- * Alignment macros. BPF_WORDALIGN rounds up to the next
- * even multiple of BPF_ALIGNMENT.
- */
- #define BPF_ALIGNMENT sizeof(bpf_int32)
- #define BPF_WORDALIGN(x) (((x)+(BPF_ALIGNMENT-1))&~(BPF_ALIGNMENT-1))
- #define BPF_MAXINSNS 512
- #define BPF_MAXBUFSIZE 0x8000
- #define BPF_MINBUFSIZE 32
- #if ((CPU_FAMILY==I960) && (defined __GNUC__))
- #pragma align 1 /* tell gcc960 not to optimize alignments */
- #endif /* CPU_FAMILY==I960 */
- /*
- * Structure for BIOCSETF.
- */
- struct bpf_program {
- u_int bf_len;
- struct bpf_insn *bf_insns;
- };
- /*
- * Struct returned by BIOCGSTATS.
- */
- struct bpf_stat {
- u_int bs_recv; /* number of packets received */
- u_int 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 {
- u_short bv_major;
- u_short bv_minor;
- };
- /* Current version number of filter architecture. */
- #define BPF_MAJOR_VERSION 1
- #define BPF_MINOR_VERSION 1
- /*
- * BPF ioctls
- */
- #define BIOCGBLEN _IOR('B',102, u_int)
- #define BIOCSBLEN _IOWR('B',102, u_int)
- #define BIOCSETF _IOW('B',103, struct bpf_program)
- #define BIOCFLUSH _IO('B',104)
- #define BIOCPROMISC _IO('B',105)
- #define BIOCGDLT _IOR('B',106, u_int)
- #define BIOCGETIF _IOR('B',107, struct ifreq)
- #define BIOCSETIF _IOW('B',108, struct ifreq)
- #define BIOCSRTIMEOUT _IOW('B',109, struct timeval)
- #define BIOCGRTIMEOUT _IOR('B',110, struct timeval)
- #define BIOCGSTATS _IOR('B',111, struct bpf_stat)
- #define BIOCIMMEDIATE _IOW('B',112, u_int)
- #define BIOCVERSION _IOR('B',113, struct bpf_version)
- #define BIOCSTCPF _IOW('B',114, struct bpf_program)
- #define BIOCSUDPF _IOW('B',115, struct bpf_program)
- /*
- * Re-use (unsupported) BIOCSTCPF and BIOCSUDPF macro values
- * for custom operations allowing BPF devices to pause and
- * resume the filtering process (without closing the device).
- */
- #define BIOCSTOP _IO('B',114)
- #define BIOCSTART _IOW('B',115, struct ifreq)
- /*
- * Structure prepended to each packet.
- */
- struct bpf_hdr {
- struct timeval bh_tstamp; /* time stamp */
- bpf_u_int32 bh_caplen; /* length of captured portion */
- bpf_u_int32 bh_datalen; /* original length of packet */
- u_short bh_hdrlen; /* length of bpf header (this struct
- plus alignment padding) */
- bpf_u_int32 bh_linklen; /* length of link level header */
- };
- /*
- * Data-link level type codes.
- */
- #define DLT_NULL 0 /* no link-layer encapsulation */
- #define DLT_EN10MB 1 /* Ethernet (10Mb) */
- #define DLT_EN3MB 2 /* Experimental Ethernet (3Mb) */
- #define DLT_AX25 3 /* Amateur Radio AX.25 */
- #define DLT_PRONET 4 /* Proteon ProNET Token Ring */
- #define DLT_CHAOS 5 /* Chaos */
- #define DLT_IEEE802 6 /* IEEE 802 Networks */
- #define DLT_ARCNET 7 /* ARCNET */
- #define DLT_SLIP 8 /* Serial Line IP */
- #define DLT_PPP 9 /* Point-to-point Protocol */
- #define DLT_FDDI 10 /* FDDI */
- #define DLT_ATM_RFC1483 11 /* LLC/SNAP encapsulated atm */
- #define DLT_RAW 12 /* raw IP */
- #define DLT_SLIP_BSDOS 13 /* BSD/OS Serial Line IP */
- #define DLT_PPP_BSDOS 14 /* BSD/OS Point-to-point Protocol */
- /*
- * The instruction encondings.
- */
- /* 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
- /* argument values for link-layer independence ((code) & 0x300) */
- #define BPF_TYPE 0x0100 /* MUX frame type value */
- #define BPF_HLEN 0x0200 /* Offset to start of frame data */
- /*
- * The instruction data structure.
- */
- typedef struct bpf_insn {
- u_short code;
- u_char jt;
- u_char jf;
- bpf_int32 k;
- } BPF_INSN;
- #if ((CPU_FAMILY==I960) && (defined __GNUC__))
- #pragma align 0 /* turn off alignment requirement */
- #endif /* CPU_FAMILY==I960 */
- /*
- * Macros for insn array initializers.
- */
- #define BPF_STMT(code, k) { (u_short)(code), 0, 0, k }
- #define BPF_JUMP(code, k, jt, jf) { (u_short)(code), jt, jf, k }
- extern u_int bpf_filter();
- extern int bpf_validate();
- /*
- * Number of scratch memory words (for BPF_LD|BPF_MEM and BPF_ST).
- */
- #define BPF_MEMWORDS 16
- #ifdef __cplusplus
- }
- #endif
- #endif