/* $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_ */
