/* * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * 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. 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 * @(#)bpf.h 1.34 (LBL) 6/16/96 * * $FreeBSD: src/sys/net/bpf.h,v 1.21.2.3 2001/08/01 00:23:13 fenner Exp $ */ #ifndef _NET_BPF_H_ #define _NET_BPF_H_ #include <sys/appleapiopts.h> #include <sys/types.h> #include <sys/time.h> #include <sys/cdefs.h> #ifdef KERNEL #include <sys/kernel_types.h> #endif /* BSD style release date */ #define BPF_RELEASE 199606 typedef int32_t 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 0x80000 #define BPF_MINBUFSIZE 32 /* * Structure for BIOCSETF. */ struct bpf_program { u_int bf_len; struct bpf_insn *bf_insns; }; #ifdef KERNEL /* LP64 version of bpf_program. all pointers * grow when we're dealing with a 64-bit process. * WARNING - keep in sync with bpf_program */ #if __DARWIN_ALIGN_NATURAL #pragma options align=natural #endif struct user_bpf_program { u_int bf_len; user_addr_t bf_insns; }; #if __DARWIN_ALIGN_NATURAL #pragma options align=reset #endif #endif // KERNEL /* * 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 #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 BIOCGRSIG _IOR('B',114, u_int) #define BIOCSRSIG _IOW('B',115, u_int) #define BIOCGHDRCMPLT _IOR('B',116, u_int) #define BIOCSHDRCMPLT _IOW('B',117, u_int) #define BIOCGSEESENT _IOR('B',118, u_int) #define BIOCSSEESENT _IOW('B',119, u_int) /* * 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) */ }; /* * 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. */ #ifdef KERNEL #define SIZEOF_BPF_HDR (sizeof(struct bpf_hdr) <= 20 ? 18 : \ sizeof(struct bpf_hdr)) #endif /* * 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_APPLE_IP_OVER_IEEE1394 138 /* * These are values from BSD/OS's "bpf.h". * These are not the same as the values from the traditional libpcap * "bpf.h"; however, these values shouldn't be generated by any * OS other than BSD/OS, so the correct values to use here are the * BSD/OS values. * * Platforms that have already assigned these values to other * DLT_ codes, however, should give these codes the values * from that platform, so that programs that use these codes will * continue to compile - even though they won't correctly read * files of these types. */ #define DLT_SLIP_BSDOS 15 /* BSD/OS Serial Line IP */ #define DLT_PPP_BSDOS 16 /* BSD/OS Point-to-point Protocol */ #define DLT_ATM_CLIP 19 /* Linux Classical-IP over ATM */ /* * This value is defined by NetBSD; other platforms should refrain from * using it for other purposes, so that NetBSD savefiles with a link * type of 50 can be read as this type on all platforms. */ #define DLT_PPP_SERIAL 50 /* PPP over serial with HDLC encapsulation */ /* * This value was defined by libpcap 0.5; platforms that have defined * it with a different value should define it here with that value - * a link type of 104 in a save file will be mapped to DLT_C_HDLC, * whatever value that happens to be, so programs will correctly * handle files with that link type regardless of the value of * DLT_C_HDLC. * * The name DLT_C_HDLC was used by BSD/OS; we use that name for source * compatibility with programs written for BSD/OS. * * libpcap 0.5 defined it as DLT_CHDLC; we define DLT_CHDLC as well, * for source compatibility with programs written for libpcap 0.5. */ #define DLT_C_HDLC 104 /* Cisco HDLC */ #define DLT_CHDLC DLT_C_HDLC /* * Reserved for future use. * Do not pick other numerical value for these unless you have also * picked up the tcpdump.org top-of-CVS-tree version of "savefile.c", * which will arrange that capture files for these DLT_ types have * the same "network" value on all platforms, regardless of what * value is chosen for their DLT_ type (thus allowing captures made * on one platform to be read on other platforms, even if the two * platforms don't use the same numerical values for all DLT_ types). */ #define DLT_IEEE802_11 105 /* IEEE 802.11 wireless */ /* * Values between 106 and 107 are used in capture file headers as * link-layer types corresponding to DLT_ types that might differ * between platforms; don't use those values for new DLT_ new types. */ /* * OpenBSD DLT_LOOP, for loopback devices; it's like DLT_NULL, except * that the AF_ type in the link-layer header is in network byte order. * * OpenBSD defines it as 12, but that collides with DLT_RAW, so we * define it as 108 here. If OpenBSD picks up this file, it should * define DLT_LOOP as 12 in its version, as per the comment above - * and should not use 108 for any purpose. */ #define DLT_LOOP 108 /* * Values between 109 and 112 are used in capture file headers as * link-layer types corresponding to DLT_ types that might differ * between platforms; don't use those values for new DLT_ new types. */ /* * This is for Linux cooked sockets. */ #define DLT_LINUX_SLL 113 /* * 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 { u_short code; u_char jt; u_char jf; bpf_u_int32 k; }; /* * 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 } #ifdef KERNEL_PRIVATE /* Forward declerations */ struct ifnet; struct mbuf; int bpf_validate(const struct bpf_insn *, int); void bpf_tap(struct ifnet *, u_char *, u_int); void bpf_mtap(struct ifnet *, struct mbuf *); void bpfdetach(struct ifnet *); void bpfilterattach(int); u_int bpf_filter(const struct bpf_insn *, u_char *, u_int, u_int); #ifdef __APPLE__ #define BPF_TAP(x, y, z) bpf_tap(x,y,z) #define BPF_MTAP(x, y) bpf_mtap(x, y) #endif /* __APPLE__ */ #endif /* KERNEL_PRIVATE */ #ifdef KERNEL /*! @function bpfattach @discussion Registers an interface with BPF. This allows bpf devices to attach to your interface to capture packets. Your interface will be unregistered automatically when your interface is detached. @param interface The interface to register with BPF. @param data_link_type The data link type of the interface. See the DLT_* defines in bpf.h. @param header_length The length, in bytes, of the data link header. */ void bpfattach(ifnet_t interface, u_int data_link_type, u_int header_length); #endif /* KERNEL */ /* * Number of scratch memory words (for BPF_LD|BPF_MEM and BPF_ST). */ #define BPF_MEMWORDS 16 #endif