1 /* $NetBSD: bpf-ipf.h,v 1.1 2012/03/23 21:29:45 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from the Stanford/CMU enet packet filter, 8 * (net/enet.c) distributed as part of 4.3BSD, and code contributed 9 * to Berkeley by Steven McCanne and Van Jacobson both of Lawrence 10 * Berkeley Laboratory. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)bpf.h 7.1 (Berkeley) 5/7/91 41 * 42 * @(#) Header: /devel/CVS/IP-Filter/bpf-ipf.h,v 2.2 2007/10/25 17:03:18 darrenr Exp (LBL) 43 */ 44 45 #ifndef BPF_MAJOR_VERSION 46 47 #ifdef __cplusplus 48 extern "C" { 49 #endif 50 51 /* BSD style release date */ 52 #define BPF_RELEASE 199606 53 54 typedef int bpf_int32; 55 typedef u_int bpf_u_int32; 56 57 /* 58 * Alignment macros. BPF_WORDALIGN rounds up to the next 59 * even multiple of BPF_ALIGNMENT. 60 */ 61 #ifndef __NetBSD__ 62 #define BPF_ALIGNMENT sizeof(bpf_int32) 63 #else 64 #define BPF_ALIGNMENT sizeof(long) 65 #endif 66 #define BPF_WORDALIGN(x) (((x)+(BPF_ALIGNMENT-1))&~(BPF_ALIGNMENT-1)) 67 68 #define BPF_MAXINSNS 512 69 #define BPF_MAXBUFSIZE 0x8000 70 #define BPF_MINBUFSIZE 32 71 72 /* 73 * Structure for BIOCSETF. 74 */ 75 struct bpf_program { 76 u_int bf_len; 77 struct bpf_insn *bf_insns; 78 }; 79 80 /* 81 * Struct returned by BIOCGSTATS. 82 */ 83 struct bpf_stat { 84 u_int bs_recv; /* number of packets received */ 85 u_int bs_drop; /* number of packets dropped */ 86 }; 87 88 /* 89 * Struct return by BIOCVERSION. This represents the version number of 90 * the filter language described by the instruction encodings below. 91 * bpf understands a program iff kernel_major == filter_major && 92 * kernel_minor >= filter_minor, that is, if the value returned by the 93 * running kernel has the same major number and a minor number equal 94 * equal to or less than the filter being downloaded. Otherwise, the 95 * results are undefined, meaning an error may be returned or packets 96 * may be accepted haphazardly. 97 * It has nothing to do with the source code version. 98 */ 99 struct bpf_version { 100 u_short bv_major; 101 u_short bv_minor; 102 }; 103 /* Current version number of filter architecture. */ 104 #define BPF_MAJOR_VERSION 1 105 #define BPF_MINOR_VERSION 1 106 107 /* 108 * BPF ioctls 109 * 110 * The first set is for compatibility with Sun's pcc style 111 * header files. If your using gcc, we assume that you 112 * have run fixincludes so the latter set should work. 113 */ 114 #if (defined(sun) || defined(ibm032)) && !defined(__GNUC__) 115 #define BIOCGBLEN _IOR(B,102, u_int) 116 #define BIOCSBLEN _IOWR(B,102, u_int) 117 #define BIOCSETF _IOW(B,103, struct bpf_program) 118 #define BIOCFLUSH _IO(B,104) 119 #define BIOCPROMISC _IO(B,105) 120 #define BIOCGDLT _IOR(B,106, u_int) 121 #define BIOCGETIF _IOR(B,107, struct ifreq) 122 #define BIOCSETIF _IOW(B,108, struct ifreq) 123 #define BIOCSRTIMEOUT _IOW(B,109, struct timeval) 124 #define BIOCGRTIMEOUT _IOR(B,110, struct timeval) 125 #define BIOCGSTATS _IOR(B,111, struct bpf_stat) 126 #define BIOCIMMEDIATE _IOW(B,112, u_int) 127 #define BIOCVERSION _IOR(B,113, struct bpf_version) 128 #define BIOCSTCPF _IOW(B,114, struct bpf_program) 129 #define BIOCSUDPF _IOW(B,115, struct bpf_program) 130 #else 131 #define BIOCGBLEN _IOR('B',102, u_int) 132 #define BIOCSBLEN _IOWR('B',102, u_int) 133 #define BIOCSETF _IOW('B',103, struct bpf_program) 134 #define BIOCFLUSH _IO('B',104) 135 #define BIOCPROMISC _IO('B',105) 136 #define BIOCGDLT _IOR('B',106, u_int) 137 #define BIOCGETIF _IOR('B',107, struct ifreq) 138 #define BIOCSETIF _IOW('B',108, struct ifreq) 139 #define BIOCSRTIMEOUT _IOW('B',109, struct timeval) 140 #define BIOCGRTIMEOUT _IOR('B',110, struct timeval) 141 #define BIOCGSTATS _IOR('B',111, struct bpf_stat) 142 #define BIOCIMMEDIATE _IOW('B',112, u_int) 143 #define BIOCVERSION _IOR('B',113, struct bpf_version) 144 #define BIOCSTCPF _IOW('B',114, struct bpf_program) 145 #define BIOCSUDPF _IOW('B',115, struct bpf_program) 146 #endif 147 148 /* 149 * Structure prepended to each packet. 150 */ 151 struct bpf_hdr { 152 struct timeval bh_tstamp; /* time stamp */ 153 bpf_u_int32 bh_caplen; /* length of captured portion */ 154 bpf_u_int32 bh_datalen; /* original length of packet */ 155 u_short bh_hdrlen; /* length of bpf header (this struct 156 plus alignment padding) */ 157 }; 158 /* 159 * Because the structure above is not a multiple of 4 bytes, some compilers 160 * will insist on inserting padding; hence, sizeof(struct bpf_hdr) won't work. 161 * Only the kernel needs to know about it; applications use bh_hdrlen. 162 */ 163 #if defined(KERNEL) || defined(_KERNEL) 164 #define SIZEOF_BPF_HDR 18 165 #endif 166 167 /* 168 * Data-link level type codes. 169 */ 170 171 /* 172 * These are the types that are the same on all platforms; on other 173 * platforms, a <net/bpf.h> should be supplied that defines the additional 174 * DLT_* codes appropriately for that platform (the BSDs, for example, 175 * should not just pick up this version of "bpf.h"; they should also define 176 * the additional DLT_* codes used by their kernels, as well as the values 177 * defined here - and, if the values they use for particular DLT_ types 178 * differ from those here, they should use their values, not the ones 179 * here). 180 */ 181 #define DLT_NULL 0 /* no link-layer encapsulation */ 182 #define DLT_EN10MB 1 /* Ethernet (10Mb) */ 183 #define DLT_EN3MB 2 /* Experimental Ethernet (3Mb) */ 184 #define DLT_AX25 3 /* Amateur Radio AX.25 */ 185 #define DLT_PRONET 4 /* Proteon ProNET Token Ring */ 186 #define DLT_CHAOS 5 /* Chaos */ 187 #define DLT_IEEE802 6 /* IEEE 802 Networks */ 188 #define DLT_ARCNET 7 /* ARCNET */ 189 #define DLT_SLIP 8 /* Serial Line IP */ 190 #define DLT_PPP 9 /* Point-to-point Protocol */ 191 #define DLT_FDDI 10 /* FDDI */ 192 193 /* 194 * These are values from the traditional libpcap "bpf.h". 195 * Ports of this to particular platforms should replace these definitions 196 * with the ones appropriate to that platform, if the values are 197 * different on that platform. 198 */ 199 #define DLT_ATM_RFC1483 11 /* LLC/SNAP encapsulated atm */ 200 #define DLT_RAW 12 /* raw IP */ 201 202 /* 203 * These are values from BSD/OS's "bpf.h". 204 * These are not the same as the values from the traditional libpcap 205 * "bpf.h"; however, these values shouldn't be generated by any 206 * OS other than BSD/OS, so the correct values to use here are the 207 * BSD/OS values. 208 * 209 * Platforms that have already assigned these values to other 210 * DLT_ codes, however, should give these codes the values 211 * from that platform, so that programs that use these codes will 212 * continue to compile - even though they won't correctly read 213 * files of these types. 214 */ 215 #ifdef __NetBSD__ 216 #ifndef DLT_SLIP_BSDOS 217 #define DLT_SLIP_BSDOS 13 /* BSD/OS Serial Line IP */ 218 #define DLT_PPP_BSDOS 14 /* BSD/OS Point-to-point Protocol */ 219 #endif 220 #else 221 #define DLT_SLIP_BSDOS 15 /* BSD/OS Serial Line IP */ 222 #define DLT_PPP_BSDOS 16 /* BSD/OS Point-to-point Protocol */ 223 #endif 224 225 #define DLT_ATM_CLIP 19 /* Linux Classical-IP over ATM */ 226 227 /* 228 * These values are defined by NetBSD; other platforms should refrain from 229 * using them for other purposes, so that NetBSD savefiles with link 230 * types of 50 or 51 can be read as this type on all platforms. 231 */ 232 #define DLT_PPP_SERIAL 50 /* PPP over serial with HDLC encapsulation */ 233 #define DLT_PPP_ETHER 51 /* PPP over Ethernet */ 234 235 /* 236 * Values between 100 and 103 are used in capture file headers as 237 * link-layer types corresponding to DLT_ types that differ 238 * between platforms; don't use those values for new DLT_ new types. 239 */ 240 241 /* 242 * This value was defined by libpcap 0.5; platforms that have defined 243 * it with a different value should define it here with that value - 244 * a link type of 104 in a save file will be mapped to DLT_C_HDLC, 245 * whatever value that happens to be, so programs will correctly 246 * handle files with that link type regardless of the value of 247 * DLT_C_HDLC. 248 * 249 * The name DLT_C_HDLC was used by BSD/OS; we use that name for source 250 * compatibility with programs written for BSD/OS. 251 * 252 * libpcap 0.5 defined it as DLT_CHDLC; we define DLT_CHDLC as well, 253 * for source compatibility with programs written for libpcap 0.5. 254 */ 255 #define DLT_C_HDLC 104 /* Cisco HDLC */ 256 #define DLT_CHDLC DLT_C_HDLC 257 258 #define DLT_IEEE802_11 105 /* IEEE 802.11 wireless */ 259 260 /* 261 * Values between 106 and 107 are used in capture file headers as 262 * link-layer types corresponding to DLT_ types that might differ 263 * between platforms; don't use those values for new DLT_ new types. 264 */ 265 266 /* 267 * OpenBSD DLT_LOOP, for loopback devices; it's like DLT_NULL, except 268 * that the AF_ type in the link-layer header is in network byte order. 269 * 270 * OpenBSD defines it as 12, but that collides with DLT_RAW, so we 271 * define it as 108 here. If OpenBSD picks up this file, it should 272 * define DLT_LOOP as 12 in its version, as per the comment above - 273 * and should not use 108 as a DLT_ value. 274 */ 275 #define DLT_LOOP 108 276 277 /* 278 * Values between 109 and 112 are used in capture file headers as 279 * link-layer types corresponding to DLT_ types that might differ 280 * between platforms; don't use those values for new DLT_ types 281 * other than the corresponding DLT_ types. 282 */ 283 284 /* 285 * This is for Linux cooked sockets. 286 */ 287 #define DLT_LINUX_SLL 113 288 289 /* 290 * Apple LocalTalk hardware. 291 */ 292 #define DLT_LTALK 114 293 294 /* 295 * Acorn Econet. 296 */ 297 #define DLT_ECONET 115 298 299 /* 300 * Reserved for use with OpenBSD ipfilter. 301 */ 302 #define DLT_IPFILTER 116 303 304 /* 305 * Reserved for use in capture-file headers as a link-layer type 306 * corresponding to OpenBSD DLT_PFLOG; DLT_PFLOG is 17 in OpenBSD, 307 * but that's DLT_LANE8023 in SuSE 6.3, so we can't use 17 for it 308 * in capture-file headers. 309 */ 310 #define DLT_PFLOG 117 311 312 /* 313 * Registered for Cisco-internal use. 314 */ 315 #define DLT_CISCO_IOS 118 316 317 /* 318 * Reserved for 802.11 cards using the Prism II chips, with a link-layer 319 * header including Prism monitor mode information plus an 802.11 320 * header. 321 */ 322 #define DLT_PRISM_HEADER 119 323 324 /* 325 * Reserved for Aironet 802.11 cards, with an Aironet link-layer header 326 * (see Doug Ambrisko's FreeBSD patches). 327 */ 328 #define DLT_AIRONET_HEADER 120 329 330 /* 331 * Reserved for Siemens HiPath HDLC. 332 */ 333 #define DLT_HHDLC 121 334 335 /* 336 * Reserved for RFC 2625 IP-over-Fibre Channel, as per a request from 337 * Don Lee <donlee (at) cray.com>. 338 * 339 * This is not for use with raw Fibre Channel, where the link-layer 340 * header starts with a Fibre Channel frame header; it's for IP-over-FC, 341 * where the link-layer header starts with an RFC 2625 Network_Header 342 * field. 343 */ 344 #define DLT_IP_OVER_FC 122 345 346 /* 347 * The instruction encodings. 348 */ 349 /* instruction classes */ 350 #define BPF_CLASS(code) ((code) & 0x07) 351 #define BPF_LD 0x00 352 #define BPF_LDX 0x01 353 #define BPF_ST 0x02 354 #define BPF_STX 0x03 355 #define BPF_ALU 0x04 356 #define BPF_JMP 0x05 357 #define BPF_RET 0x06 358 #define BPF_MISC 0x07 359 360 /* ld/ldx fields */ 361 #define BPF_SIZE(code) ((code) & 0x18) 362 #define BPF_W 0x00 363 #define BPF_H 0x08 364 #define BPF_B 0x10 365 #define BPF_MODE(code) ((code) & 0xe0) 366 #define BPF_IMM 0x00 367 #define BPF_ABS 0x20 368 #define BPF_IND 0x40 369 #define BPF_MEM 0x60 370 #define BPF_LEN 0x80 371 #define BPF_MSH 0xa0 372 373 /* alu/jmp fields */ 374 #define BPF_OP(code) ((code) & 0xf0) 375 #define BPF_ADD 0x00 376 #define BPF_SUB 0x10 377 #define BPF_MUL 0x20 378 #define BPF_DIV 0x30 379 #define BPF_OR 0x40 380 #define BPF_AND 0x50 381 #define BPF_LSH 0x60 382 #define BPF_RSH 0x70 383 #define BPF_NEG 0x80 384 #define BPF_JA 0x00 385 #define BPF_JEQ 0x10 386 #define BPF_JGT 0x20 387 #define BPF_JGE 0x30 388 #define BPF_JSET 0x40 389 #define BPF_SRC(code) ((code) & 0x08) 390 #define BPF_K 0x00 391 #define BPF_X 0x08 392 393 /* ret - BPF_K and BPF_X also apply */ 394 #define BPF_RVAL(code) ((code) & 0x18) 395 #define BPF_A 0x10 396 397 /* misc */ 398 #define BPF_MISCOP(code) ((code) & 0xf8) 399 #define BPF_TAX 0x00 400 #define BPF_TXA 0x80 401 402 /* 403 * The instruction data structure. 404 */ 405 struct bpf_insn { 406 u_short code; 407 u_char jt; 408 u_char jf; 409 bpf_int32 k; 410 }; 411 412 /* 413 * Macros for insn array initializers. 414 */ 415 #define BPF_STMT(code, k) { (u_short)(code), 0, 0, k } 416 #define BPF_JUMP(code, k, jt, jf) { (u_short)(code), jt, jf, k } 417 418 #if defined(BSD) && (defined(KERNEL) || defined(_KERNEL)) 419 /* 420 * Systems based on non-BSD kernels don't have ifnet's (or they don't mean 421 * anything if it is in <net/if.h>) and won't work like this. 422 */ 423 # if __STDC__ 424 extern void bpf_tap(struct ifnet *, u_char *, u_int); 425 extern void bpf_mtap(struct ifnet *, struct mbuf *); 426 extern void bpfattach(struct ifnet *, u_int, u_int); 427 extern void bpfilterattach(int); 428 # else 429 extern void bpf_tap(); 430 extern void bpf_mtap(); 431 extern void bpfattach(); 432 extern void bpfilterattach(); 433 # endif /* __STDC__ */ 434 #endif /* BSD && (_KERNEL || KERNEL) */ 435 #if __STDC__ || defined(__cplusplus) 436 extern int bpf_validate(struct bpf_insn *, int); 437 extern u_int bpf_filter(struct bpf_insn *, u_char *, u_int, u_int); 438 #else 439 extern int bpf_validate(); 440 extern u_int bpf_filter(); 441 #endif 442 443 /* 444 * Number of scratch memory words (for BPF_LD|BPF_MEM and BPF_ST). 445 */ 446 #define BPF_MEMWORDS 16 447 448 #ifdef __cplusplus 449 } 450 #endif 451 452 #endif 453
Indexes created Tue Feb 24 01:34:59 UTC 2026