X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=blobdiff_plain;f=libs%2Fwatt32%2Fnet%2Fbpf.h;fp=libs%2Fwatt32%2Fnet%2Fbpf.h;h=0fb97aefc596c06aae195bd28eced5c147ec0aa0;hb=214a070238552de6167bbf506cbc23006969a182;hp=0000000000000000000000000000000000000000;hpb=d3c8a942b99443abf0c11d9759994022ed6da597;p=oftp diff --git a/libs/watt32/net/bpf.h b/libs/watt32/net/bpf.h new file mode 100644 index 0000000..0fb97ae --- /dev/null +++ b/libs/watt32/net/bpf.h @@ -0,0 +1,271 @@ +/*!\file net/bpf.h + * Berkeley Packet Filter. + */ +/* + * 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 8.1 (Berkeley) 6/10/93 + * @(#) Header: bpf.h,v 1.36 97/06/12 14:29:53 leres Exp (LBL) + */ + +#ifndef __NET_BPF_H +#define __NET_BPF_H + +#ifndef __SYS_WTYPES_H +#include +#endif + +#ifndef __SYS_WTIME_H +#include +#endif + +/* BSD style release date */ +#define BPF_RELEASE 199606 + +typedef long bpf_int32; +typedef u_int32_t bpf_u_int32; + +/* + * Alignment macros. BPF_WORDALIGN rounds up to the next + * even multiple of BPF_ALIGNMENT. + */ +#define BPF_ALIGNMENT sizeof(long) +#define BPF_WORDALIGN(x) (((x)+(BPF_ALIGNMENT-1)) & ~(BPF_ALIGNMENT-1)) + +#define BPF_MAXINSNS 512 +#define BPF_MAXBUFSIZE 0x8000 +#define BPF_MINBUFSIZE 32 + +/* + * 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 + * + * 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. + */ +#if (defined(sun) || defined(ibm032)) && !defined(__GNUC__) +# 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) +#else +# 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) +#endif + +/* + * Structure prepended to each packet. + */ +struct bpf_hdr { + struct timeval bh_tstamp; /* time stamp */ + u_int32_t bh_caplen; /* length of captured portion */ + u_int32_t bh_datalen; /* original length of packet */ + u_int16_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. + */ +#define SIZEOF_BPF_HDR sizeof(struct bpf_hdr) + +/* + * 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 */ +#define DLT_LANE8023 15 /* LANE 802.3(Ethernet) */ +#define DLT_CIP 16 /* ATM Classical IP */ + + +/* + * 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 + +/* + * The instruction data structure. + */ +struct bpf_insn { + u_int16_t code; + u_char jt; + u_char jf; + int32_t k; + }; + +/* + * Macros for insn array initializers. + */ +#define BPF_STMT(code, k) { (u_int16_t)(code), 0, 0, k } +#define BPF_JUMP(code, k, jt, jf) { (u_int16_t)(code), jt, jf, k } + +u_int bpf_filter (struct bpf_insn *, u_char *, u_int, u_int); + +/* + * Number of scratch memory words (for BPF_LD|BPF_MEM and BPF_ST). + */ +#define BPF_MEMWORDS 16 + +#endif