kernel - TMPFS - Stabilization pass, fix accounting for rmdir
[dragonfly.git] / contrib / ipfilter / bpf.h
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1 /*-
2 * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from the Stanford/CMU enet packet filter,
6 * (net/enet.c) distributed as part of 4.3BSD, and code contributed
7 * to Berkeley by Steven McCanne and Van Jacobson both of Lawrence
8 * Berkeley Laboratory.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
38 * @(#)bpf.h 7.1 (Berkeley) 5/7/91
40 * @(#) $Header: /devel/CVS/IP-Filter/Attic/bpf.h,v 1.1.2.1 2002/11/07 13:18:35 darrenr Exp $ (LBL)
43 #ifndef BPF_MAJOR_VERSION
45 #ifdef __cplusplus
46 extern "C" {
47 #endif
49 /* BSD style release date */
50 #define BPF_RELEASE 199606
52 typedef int bpf_int32;
53 typedef u_int bpf_u_int32;
56 * Alignment macros. BPF_WORDALIGN rounds up to the next
57 * even multiple of BPF_ALIGNMENT.
59 #ifndef __NetBSD__
60 #define BPF_ALIGNMENT sizeof(bpf_int32)
61 #else
62 #define BPF_ALIGNMENT sizeof(long)
63 #endif
64 #define BPF_WORDALIGN(x) (((x)+(BPF_ALIGNMENT-1))&~(BPF_ALIGNMENT-1))
66 #define BPF_MAXINSNS 512
67 #define BPF_MAXBUFSIZE 0x8000
68 #define BPF_MINBUFSIZE 32
71 * Structure for BIOCSETF.
73 struct bpf_program {
74 u_int bf_len;
75 struct bpf_insn *bf_insns;
79 * Struct returned by BIOCGSTATS.
81 struct bpf_stat {
82 u_int bs_recv; /* number of packets received */
83 u_int bs_drop; /* number of packets dropped */
87 * Struct return by BIOCVERSION. This represents the version number of
88 * the filter language described by the instruction encodings below.
89 * bpf understands a program iff kernel_major == filter_major &&
90 * kernel_minor >= filter_minor, that is, if the value returned by the
91 * running kernel has the same major number and a minor number equal
92 * equal to or less than the filter being downloaded. Otherwise, the
93 * results are undefined, meaning an error may be returned or packets
94 * may be accepted haphazardly.
95 * It has nothing to do with the source code version.
97 struct bpf_version {
98 u_short bv_major;
99 u_short bv_minor;
101 /* Current version number of filter architecture. */
102 #define BPF_MAJOR_VERSION 1
103 #define BPF_MINOR_VERSION 1
106 * BPF ioctls
108 * The first set is for compatibility with Sun's pcc style
109 * header files. If your using gcc, we assume that you
110 * have run fixincludes so the latter set should work.
112 #if (defined(sun) || defined(ibm032)) && !defined(__GNUC__)
113 #define BIOCGBLEN _IOR(B,102, u_int)
114 #define BIOCSBLEN _IOWR(B,102, u_int)
115 #define BIOCSETF _IOW(B,103, struct bpf_program)
116 #define BIOCFLUSH _IO(B,104)
117 #define BIOCPROMISC _IO(B,105)
118 #define BIOCGDLT _IOR(B,106, u_int)
119 #define BIOCGETIF _IOR(B,107, struct ifreq)
120 #define BIOCSETIF _IOW(B,108, struct ifreq)
121 #define BIOCSRTIMEOUT _IOW(B,109, struct timeval)
122 #define BIOCGRTIMEOUT _IOR(B,110, struct timeval)
123 #define BIOCGSTATS _IOR(B,111, struct bpf_stat)
124 #define BIOCIMMEDIATE _IOW(B,112, u_int)
125 #define BIOCVERSION _IOR(B,113, struct bpf_version)
126 #define BIOCSTCPF _IOW(B,114, struct bpf_program)
127 #define BIOCSUDPF _IOW(B,115, struct bpf_program)
128 #else
129 #define BIOCGBLEN _IOR('B',102, u_int)
130 #define BIOCSBLEN _IOWR('B',102, u_int)
131 #define BIOCSETF _IOW('B',103, struct bpf_program)
132 #define BIOCFLUSH _IO('B',104)
133 #define BIOCPROMISC _IO('B',105)
134 #define BIOCGDLT _IOR('B',106, u_int)
135 #define BIOCGETIF _IOR('B',107, struct ifreq)
136 #define BIOCSETIF _IOW('B',108, struct ifreq)
137 #define BIOCSRTIMEOUT _IOW('B',109, struct timeval)
138 #define BIOCGRTIMEOUT _IOR('B',110, struct timeval)
139 #define BIOCGSTATS _IOR('B',111, struct bpf_stat)
140 #define BIOCIMMEDIATE _IOW('B',112, u_int)
141 #define BIOCVERSION _IOR('B',113, struct bpf_version)
142 #define BIOCSTCPF _IOW('B',114, struct bpf_program)
143 #define BIOCSUDPF _IOW('B',115, struct bpf_program)
144 #endif
147 * Structure prepended to each packet.
149 struct bpf_hdr {
150 struct timeval bh_tstamp; /* time stamp */
151 bpf_u_int32 bh_caplen; /* length of captured portion */
152 bpf_u_int32 bh_datalen; /* original length of packet */
153 u_short bh_hdrlen; /* length of bpf header (this struct
154 plus alignment padding) */
157 * Because the structure above is not a multiple of 4 bytes, some compilers
158 * will insist on inserting padding; hence, sizeof(struct bpf_hdr) won't work.
159 * Only the kernel needs to know about it; applications use bh_hdrlen.
161 #if defined(KERNEL) || defined(_KERNEL)
162 #define SIZEOF_BPF_HDR 18
163 #endif
166 * Data-link level type codes.
170 * These are the types that are the same on all platforms; on other
171 * platforms, a <net/bpf.h> should be supplied that defines the additional
172 * DLT_* codes appropriately for that platform (the BSDs, for example,
173 * should not just pick up this version of "bpf.h"; they should also define
174 * the additional DLT_* codes used by their kernels, as well as the values
175 * defined here - and, if the values they use for particular DLT_ types
176 * differ from those here, they should use their values, not the ones
177 * here).
179 #define DLT_NULL 0 /* no link-layer encapsulation */
180 #define DLT_EN10MB 1 /* Ethernet (10Mb) */
181 #define DLT_EN3MB 2 /* Experimental Ethernet (3Mb) */
182 #define DLT_AX25 3 /* Amateur Radio AX.25 */
183 #define DLT_PRONET 4 /* Proteon ProNET Token Ring */
184 #define DLT_CHAOS 5 /* Chaos */
185 #define DLT_IEEE802 6 /* IEEE 802 Networks */
186 #define DLT_ARCNET 7 /* ARCNET */
187 #define DLT_SLIP 8 /* Serial Line IP */
188 #define DLT_PPP 9 /* Point-to-point Protocol */
189 #define DLT_FDDI 10 /* FDDI */
192 * These are values from the traditional libpcap "bpf.h".
193 * Ports of this to particular platforms should replace these definitions
194 * with the ones appropriate to that platform, if the values are
195 * different on that platform.
197 #define DLT_ATM_RFC1483 11 /* LLC/SNAP encapsulated atm */
198 #define DLT_RAW 12 /* raw IP */
201 * These are values from BSD/OS's "bpf.h".
202 * These are not the same as the values from the traditional libpcap
203 * "bpf.h"; however, these values shouldn't be generated by any
204 * OS other than BSD/OS, so the correct values to use here are the
205 * BSD/OS values.
207 * Platforms that have already assigned these values to other
208 * DLT_ codes, however, should give these codes the values
209 * from that platform, so that programs that use these codes will
210 * continue to compile - even though they won't correctly read
211 * files of these types.
213 #ifdef __NetBSD__
214 #ifndef DLT_SLIP_BSDOS
215 #define DLT_SLIP_BSDOS 13 /* BSD/OS Serial Line IP */
216 #define DLT_PPP_BSDOS 14 /* BSD/OS Point-to-point Protocol */
217 #endif
218 #else
219 #define DLT_SLIP_BSDOS 15 /* BSD/OS Serial Line IP */
220 #define DLT_PPP_BSDOS 16 /* BSD/OS Point-to-point Protocol */
221 #endif
223 #define DLT_ATM_CLIP 19 /* Linux Classical-IP over ATM */
226 * These values are defined by NetBSD; other platforms should refrain from
227 * using them for other purposes, so that NetBSD savefiles with link
228 * types of 50 or 51 can be read as this type on all platforms.
230 #define DLT_PPP_SERIAL 50 /* PPP over serial with HDLC encapsulation */
231 #define DLT_PPP_ETHER 51 /* PPP over Ethernet */
234 * Values between 100 and 103 are used in capture file headers as
235 * link-layer types corresponding to DLT_ types that differ
236 * between platforms; don't use those values for new DLT_ new types.
240 * This value was defined by libpcap 0.5; platforms that have defined
241 * it with a different value should define it here with that value -
242 * a link type of 104 in a save file will be mapped to DLT_C_HDLC,
243 * whatever value that happens to be, so programs will correctly
244 * handle files with that link type regardless of the value of
245 * DLT_C_HDLC.
247 * The name DLT_C_HDLC was used by BSD/OS; we use that name for source
248 * compatibility with programs written for BSD/OS.
250 * libpcap 0.5 defined it as DLT_CHDLC; we define DLT_CHDLC as well,
251 * for source compatibility with programs written for libpcap 0.5.
253 #define DLT_C_HDLC 104 /* Cisco HDLC */
254 #define DLT_CHDLC DLT_C_HDLC
256 #define DLT_IEEE802_11 105 /* IEEE 802.11 wireless */
259 * Values between 106 and 107 are used in capture file headers as
260 * link-layer types corresponding to DLT_ types that might differ
261 * between platforms; don't use those values for new DLT_ new types.
265 * OpenBSD DLT_LOOP, for loopback devices; it's like DLT_NULL, except
266 * that the AF_ type in the link-layer header is in network byte order.
268 * OpenBSD defines it as 12, but that collides with DLT_RAW, so we
269 * define it as 108 here. If OpenBSD picks up this file, it should
270 * define DLT_LOOP as 12 in its version, as per the comment above -
271 * and should not use 108 as a DLT_ value.
273 #define DLT_LOOP 108
276 * Values between 109 and 112 are used in capture file headers as
277 * link-layer types corresponding to DLT_ types that might differ
278 * between platforms; don't use those values for new DLT_ types
279 * other than the corresponding DLT_ types.
283 * This is for Linux cooked sockets.
285 #define DLT_LINUX_SLL 113
288 * Apple LocalTalk hardware.
290 #define DLT_LTALK 114
293 * Acorn Econet.
295 #define DLT_ECONET 115
298 * Reserved for use with OpenBSD ipfilter.
300 #define DLT_IPFILTER 116
303 * Reserved for use in capture-file headers as a link-layer type
304 * corresponding to OpenBSD DLT_PFLOG; DLT_PFLOG is 17 in OpenBSD,
305 * but that's DLT_LANE8023 in SuSE 6.3, so we can't use 17 for it
306 * in capture-file headers.
308 #define DLT_PFLOG 117
311 * Registered for Cisco-internal use.
313 #define DLT_CISCO_IOS 118
316 * Reserved for 802.11 cards using the Prism II chips, with a link-layer
317 * header including Prism monitor mode information plus an 802.11
318 * header.
320 #define DLT_PRISM_HEADER 119
323 * Reserved for Aironet 802.11 cards, with an Aironet link-layer header
324 * (see Doug Ambrisko's FreeBSD patches).
326 #define DLT_AIRONET_HEADER 120
329 * Reserved for Siemens HiPath HDLC.
331 #define DLT_HHDLC 121
334 * Reserved for RFC 2625 IP-over-Fibre Channel, as per a request from
335 * Don Lee <donlee@cray.com>.
337 * This is not for use with raw Fibre Channel, where the link-layer
338 * header starts with a Fibre Channel frame header; it's for IP-over-FC,
339 * where the link-layer header starts with an RFC 2625 Network_Header
340 * field.
342 #define DLT_IP_OVER_FC 122
345 * The instruction encodings.
347 /* instruction classes */
348 #define BPF_CLASS(code) ((code) & 0x07)
349 #define BPF_LD 0x00
350 #define BPF_LDX 0x01
351 #define BPF_ST 0x02
352 #define BPF_STX 0x03
353 #define BPF_ALU 0x04
354 #define BPF_JMP 0x05
355 #define BPF_RET 0x06
356 #define BPF_MISC 0x07
358 /* ld/ldx fields */
359 #define BPF_SIZE(code) ((code) & 0x18)
360 #define BPF_W 0x00
361 #define BPF_H 0x08
362 #define BPF_B 0x10
363 #define BPF_MODE(code) ((code) & 0xe0)
364 #define BPF_IMM 0x00
365 #define BPF_ABS 0x20
366 #define BPF_IND 0x40
367 #define BPF_MEM 0x60
368 #define BPF_LEN 0x80
369 #define BPF_MSH 0xa0
371 /* alu/jmp fields */
372 #define BPF_OP(code) ((code) & 0xf0)
373 #define BPF_ADD 0x00
374 #define BPF_SUB 0x10
375 #define BPF_MUL 0x20
376 #define BPF_DIV 0x30
377 #define BPF_OR 0x40
378 #define BPF_AND 0x50
379 #define BPF_LSH 0x60
380 #define BPF_RSH 0x70
381 #define BPF_NEG 0x80
382 #define BPF_JA 0x00
383 #define BPF_JEQ 0x10
384 #define BPF_JGT 0x20
385 #define BPF_JGE 0x30
386 #define BPF_JSET 0x40
387 #define BPF_SRC(code) ((code) & 0x08)
388 #define BPF_K 0x00
389 #define BPF_X 0x08
391 /* ret - BPF_K and BPF_X also apply */
392 #define BPF_RVAL(code) ((code) & 0x18)
393 #define BPF_A 0x10
395 /* misc */
396 #define BPF_MISCOP(code) ((code) & 0xf8)
397 #define BPF_TAX 0x00
398 #define BPF_TXA 0x80
401 * The instruction data structure.
403 struct bpf_insn {
404 u_short code;
405 u_char jt;
406 u_char jf;
407 bpf_int32 k;
411 * Macros for insn array initializers.
413 #define BPF_STMT(code, k) { (u_short)(code), 0, 0, k }
414 #define BPF_JUMP(code, k, jt, jf) { (u_short)(code), jt, jf, k }
416 #if defined(BSD) && (defined(KERNEL) || defined(_KERNEL))
418 * Systems based on non-BSD kernels don't have ifnet's (or they don't mean
419 * anything if it is in <net/if.h>) and won't work like this.
421 # if __STDC__
422 extern void bpf_tap(struct ifnet *, u_char *, u_int);
423 extern void bpf_mtap(struct ifnet *, struct mbuf *);
424 extern void bpfattach(struct ifnet *, u_int, u_int);
425 extern void bpfilterattach(int);
426 # else
427 extern void bpf_tap();
428 extern void bpf_mtap();
429 extern void bpfattach();
430 extern void bpfilterattach();
431 # endif /* __STDC__ */
432 #endif /* BSD && (_KERNEL || KERNEL) */
433 #if __STDC__ || defined(__cplusplus)
434 extern int bpf_validate(struct bpf_insn *, int);
435 extern u_int bpf_filter(struct bpf_insn *, u_char *, u_int, u_int);
436 #else
437 extern int bpf_validate();
438 extern u_int bpf_filter();
439 #endif
442 * Number of scratch memory words (for BPF_LD|BPF_MEM and BPF_ST).
444 #define BPF_MEMWORDS 16
446 #ifdef __cplusplus
448 #endif
450 #endif