1 /*- 2 * Copyright (c) 1990, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 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. 9 * 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 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)bpf.h 8.1 (Berkeley) 6/10/93 35 * @(#)bpf.h 1.34 (LBL) 6/16/96 36 * 37 * $FreeBSD$ 38 */ 39 40 #ifndef _NET_BPF_H_ 41 #define _NET_BPF_H_ 42 43 /* BSD style release date */ 44 #define BPF_RELEASE 199606 45 46 typedef int32_t bpf_int32; 47 typedef u_int32_t bpf_u_int32; 48 49 /* 50 * Alignment macros. BPF_WORDALIGN rounds up to the next 51 * even multiple of BPF_ALIGNMENT. 52 */ 53 #define BPF_ALIGNMENT sizeof(long) 54 #define BPF_WORDALIGN(x) (((x)+(BPF_ALIGNMENT-1))&~(BPF_ALIGNMENT-1)) 55 56 #define BPF_MAXINSNS 512 57 #define BPF_MAXBUFSIZE 0x80000 58 #define BPF_MINBUFSIZE 32 59 60 /* 61 * Structure for BIOCSETF. 62 */ 63 struct bpf_program { 64 u_int bf_len; 65 struct bpf_insn *bf_insns; 66 }; 67 68 /* 69 * Struct returned by BIOCGSTATS. 70 */ 71 struct bpf_stat { 72 u_int bs_recv; /* number of packets received */ 73 u_int bs_drop; /* number of packets dropped */ 74 }; 75 76 /* 77 * Struct return by BIOCVERSION. This represents the version number of 78 * the filter language described by the instruction encodings below. 79 * bpf understands a program iff kernel_major == filter_major && 80 * kernel_minor >= filter_minor, that is, if the value returned by the 81 * running kernel has the same major number and a minor number equal 82 * equal to or less than the filter being downloaded. Otherwise, the 83 * results are undefined, meaning an error may be returned or packets 84 * may be accepted haphazardly. 85 * It has nothing to do with the source code version. 86 */ 87 struct bpf_version { 88 u_short bv_major; 89 u_short bv_minor; 90 }; 91 /* Current version number of filter architecture. */ 92 #define BPF_MAJOR_VERSION 1 93 #define BPF_MINOR_VERSION 1 94 95 #define BIOCGBLEN _IOR('B',102, u_int) 96 #define BIOCSBLEN _IOWR('B',102, u_int) 97 #define BIOCSETF _IOW('B',103, struct bpf_program) 98 #define BIOCFLUSH _IO('B',104) 99 #define BIOCPROMISC _IO('B',105) 100 #define BIOCGDLT _IOR('B',106, u_int) 101 #define BIOCGETIF _IOR('B',107, struct ifreq) 102 #define BIOCSETIF _IOW('B',108, struct ifreq) 103 #define BIOCSRTIMEOUT _IOW('B',109, struct timeval) 104 #define BIOCGRTIMEOUT _IOR('B',110, struct timeval) 105 #define BIOCGSTATS _IOR('B',111, struct bpf_stat) 106 #define BIOCIMMEDIATE _IOW('B',112, u_int) 107 #define BIOCVERSION _IOR('B',113, struct bpf_version) 108 #define BIOCGRSIG _IOR('B',114, u_int) 109 #define BIOCSRSIG _IOW('B',115, u_int) 110 #define BIOCGHDRCMPLT _IOR('B',116, u_int) 111 #define BIOCSHDRCMPLT _IOW('B',117, u_int) 112 #define BIOCGSEESENT _IOR('B',118, u_int) 113 #define BIOCSSEESENT _IOW('B',119, u_int) 114 #define BIOCSDLT _IOW('B',120, u_int) 115 #define BIOCGDLTLIST _IOWR('B',121, struct bpf_dltlist) 116 117 /* 118 * Structure prepended to each packet. 119 */ 120 struct bpf_hdr { 121 struct timeval bh_tstamp; /* time stamp */ 122 bpf_u_int32 bh_caplen; /* length of captured portion */ 123 bpf_u_int32 bh_datalen; /* original length of packet */ 124 u_short bh_hdrlen; /* length of bpf header (this struct 125 plus alignment padding) */ 126 }; 127 /* 128 * Because the structure above is not a multiple of 4 bytes, some compilers 129 * will insist on inserting padding; hence, sizeof(struct bpf_hdr) won't work. 130 * Only the kernel needs to know about it; applications use bh_hdrlen. 131 */ 132 #ifdef _KERNEL 133 #define SIZEOF_BPF_HDR (sizeof(struct bpf_hdr) <= 20 ? 18 : \ 134 sizeof(struct bpf_hdr)) 135 #endif 136 137 /* 138 * Data-link level type codes. 139 */ 140 #define DLT_NULL 0 /* BSD loopback encapsulation */ 141 #define DLT_EN10MB 1 /* Ethernet (10Mb) */ 142 #define DLT_EN3MB 2 /* Experimental Ethernet (3Mb) */ 143 #define DLT_AX25 3 /* Amateur Radio AX.25 */ 144 #define DLT_PRONET 4 /* Proteon ProNET Token Ring */ 145 #define DLT_CHAOS 5 /* Chaos */ 146 #define DLT_IEEE802 6 /* IEEE 802 Networks */ 147 #define DLT_ARCNET 7 /* ARCNET */ 148 #define DLT_SLIP 8 /* Serial Line IP */ 149 #define DLT_PPP 9 /* Point-to-point Protocol */ 150 #define DLT_FDDI 10 /* FDDI */ 151 #define DLT_ATM_RFC1483 11 /* LLC/SNAP encapsulated atm */ 152 #define DLT_RAW 12 /* raw IP */ 153 154 /* 155 * These are values from BSD/OS's "bpf.h". 156 * These are not the same as the values from the traditional libpcap 157 * "bpf.h"; however, these values shouldn't be generated by any 158 * OS other than BSD/OS, so the correct values to use here are the 159 * BSD/OS values. 160 * 161 * Platforms that have already assigned these values to other 162 * DLT_ codes, however, should give these codes the values 163 * from that platform, so that programs that use these codes will 164 * continue to compile - even though they won't correctly read 165 * files of these types. 166 */ 167 #define DLT_SLIP_BSDOS 15 /* BSD/OS Serial Line IP */ 168 #define DLT_PPP_BSDOS 16 /* BSD/OS Point-to-point Protocol */ 169 170 #define DLT_ATM_CLIP 19 /* Linux Classical-IP over ATM */ 171 172 /* 173 * These values are defined by NetBSD; other platforms should refrain from 174 * using them for other purposes, so that NetBSD savefiles with link 175 * types of 50 or 51 can be read as this type on all platforms. 176 */ 177 #define DLT_PPP_SERIAL 50 /* PPP over serial with HDLC encapsulation */ 178 #define DLT_PPP_ETHER 51 /* PPP over Ethernet */ 179 180 /* 181 * Reserved for the Symantec Enterprise Firewall. 182 */ 183 #define DLT_SYMANTEC_FIREWALL 99 184 185 186 /* 187 * This value was defined by libpcap 0.5; platforms that have defined 188 * it with a different value should define it here with that value - 189 * a link type of 104 in a save file will be mapped to DLT_C_HDLC, 190 * whatever value that happens to be, so programs will correctly 191 * handle files with that link type regardless of the value of 192 * DLT_C_HDLC. 193 * 194 * The name DLT_C_HDLC was used by BSD/OS; we use that name for source 195 * compatibility with programs written for BSD/OS. 196 * 197 * libpcap 0.5 defined it as DLT_CHDLC; we define DLT_CHDLC as well, 198 * for source compatibility with programs written for libpcap 0.5. 199 */ 200 #define DLT_C_HDLC 104 /* Cisco HDLC */ 201 #define DLT_CHDLC DLT_C_HDLC 202 203 #define DLT_IEEE802_11 105 /* IEEE 802.11 wireless */ 204 205 /* 206 * Values between 106 and 107 are used in capture file headers as 207 * link-layer types corresponding to DLT_ types that might differ 208 * between platforms; don't use those values for new DLT_ new types. 209 */ 210 211 /* 212 * Frame Relay; BSD/OS has a DLT_FR with a value of 11, but that collides 213 * with other values. 214 * DLT_FR and DLT_FRELAY packets start with the Q.922 Frame Relay header 215 * (DLCI, etc.). 216 */ 217 #define DLT_FRELAY 107 218 219 /* 220 * OpenBSD DLT_LOOP, for loopback devices; it's like DLT_NULL, except 221 * that the AF_ type in the link-layer header is in network byte order. 222 * 223 * OpenBSD defines it as 12, but that collides with DLT_RAW, so we 224 * define it as 108 here. If OpenBSD picks up this file, it should 225 * define DLT_LOOP as 12 in its version, as per the comment above - 226 * and should not use 108 as a DLT_ value. 227 */ 228 #define DLT_LOOP 108 229 230 /* 231 * Values between 109 and 112 are used in capture file headers as 232 * link-layer types corresponding to DLT_ types that might differ 233 * between platforms; don't use those values for new DLT_ new types. 234 */ 235 236 /* 237 * Encapsulated packets for IPsec; DLT_ENC is 13 in OpenBSD, but that's 238 * DLT_SLIP_BSDOS in NetBSD, so we don't use 13 for it in OSes other 239 * than OpenBSD. 240 */ 241 #define DLT_ENC 109 242 243 /* 244 * This is for Linux cooked sockets. 245 */ 246 #define DLT_LINUX_SLL 113 247 248 /* 249 * Apple LocalTalk hardware. 250 */ 251 #define DLT_LTALK 114 252 253 /* 254 * Acorn Econet. 255 */ 256 #define DLT_ECONET 115 257 258 /* 259 * Reserved for use with OpenBSD ipfilter. 260 */ 261 #define DLT_IPFILTER 116 262 263 /* 264 * Reserved for use in capture-file headers as a link-layer type 265 * corresponding to OpenBSD DLT_PFLOG; DLT_PFLOG is 17 in OpenBSD, 266 * but that's DLT_LANE8023 in SuSE 6.3, so we can't use 17 for it 267 * in capture-file headers. 268 */ 269 #define DLT_PFLOG 117 270 271 /* 272 * Registered for Cisco-internal use. 273 */ 274 #define DLT_CISCO_IOS 118 275 276 /* 277 * Reserved for 802.11 cards using the Prism II chips, with a link-layer 278 * header including Prism monitor mode information plus an 802.11 279 * header. 280 */ 281 #define DLT_PRISM_HEADER 119 282 283 /* 284 * Reserved for Aironet 802.11 cards, with an Aironet link-layer header 285 * (see Doug Ambrisko's FreeBSD patches). 286 */ 287 #define DLT_AIRONET_HEADER 120 288 289 /* 290 * Reserved for use by OpenBSD's pfsync device. 291 */ 292 #define DLT_PFSYNC 121 293 294 /* 295 * Reserved for Siemens HiPath HDLC. XXX 296 */ 297 #define DLT_HHDLC 121 298 299 /* 300 * Reserved for RFC 2625 IP-over-Fibre Channel. 301 */ 302 #define DLT_IP_OVER_FC 122 303 304 /* 305 * Reserved for Full Frontal ATM on Solaris. 306 */ 307 #define DLT_SUNATM 123 308 309 /* 310 * Reserved as per request from Kent Dahlgren <kent@praesum.com> 311 * for private use. 312 */ 313 #define DLT_RIO 124 /* RapidIO */ 314 #define DLT_PCI_EXP 125 /* PCI Express */ 315 #define DLT_AURORA 126 /* Xilinx Aurora link layer */ 316 317 /* 318 * BSD header for 802.11 plus a number of bits of link-layer information 319 * including radio information. 320 */ 321 #ifndef DLT_IEEE802_11_RADIO 322 #define DLT_IEEE802_11_RADIO 127 323 #endif 324 325 /* 326 * Reserved for TZSP encapsulation. 327 */ 328 #define DLT_TZSP 128 /* Tazmen Sniffer Protocol */ 329 330 /* 331 * Reserved for Linux ARCNET. 332 */ 333 #define DLT_ARCNET_LINUX 129 334 335 /* 336 * Juniper-private data link types. 337 */ 338 #define DLT_JUNIPER_MLPPP 130 339 #define DLT_JUNIPER_MLFR 131 340 #define DLT_JUNIPER_ES 132 341 #define DLT_JUNIPER_GGSN 133 342 #define DLT_JUNIPER_MFR 134 343 #define DLT_JUNIPER_ATM2 135 344 #define DLT_JUNIPER_SERVICES 136 345 #define DLT_JUNIPER_ATM1 137 346 347 /* 348 * Apple IP-over-IEEE 1394, as per a request from Dieter Siegmund 349 * <dieter@apple.com>. The header that's presented is an Ethernet-like 350 * header: 351 * 352 * #define FIREWIRE_EUI64_LEN 8 353 * struct firewire_header { 354 * u_char firewire_dhost[FIREWIRE_EUI64_LEN]; 355 * u_char firewire_shost[FIREWIRE_EUI64_LEN]; 356 * u_short firewire_type; 357 * }; 358 * 359 * with "firewire_type" being an Ethernet type value, rather than, 360 * for example, raw GASP frames being handed up. 361 */ 362 #define DLT_APPLE_IP_OVER_IEEE1394 138 363 364 /* 365 * 139 through 142 are reserved for SS7. 366 */ 367 368 /* 369 * Reserved for DOCSIS. 370 */ 371 #define DLT_DOCSIS 143 372 373 /* 374 * Reserved for Linux IrDA. 375 */ 376 #define DLT_LINUX_IRDA 144 377 378 /* 379 * Reserved for IBM SP switch and IBM Next Federation switch. 380 */ 381 #define DLT_IBM_SP 145 382 #define DLT_IBM_SN 146 383 384 /* 385 * Reserved for private use. If you have some link-layer header type 386 * that you want to use within your organization, with the capture files 387 * using that link-layer header type not ever be sent outside your 388 * organization, you can use these values. 389 * 390 * No libpcap release will use these for any purpose, nor will any 391 * tcpdump release use them, either. 392 * 393 * Do *NOT* use these in capture files that you expect anybody not using 394 * your private versions of capture-file-reading tools to read; in 395 * particular, do *NOT* use them in products, otherwise you may find that 396 * people won't be able to use tcpdump, or snort, or Ethereal, or... to 397 * read capture files from your firewall/intrusion detection/traffic 398 * monitoring/etc. appliance, or whatever product uses that DLT_ value, 399 * and you may also find that the developers of those applications will 400 * not accept patches to let them read those files. 401 * 402 * Also, do not use them if somebody might send you a capture using them 403 * for *their* private type and tools using them for *your* private type 404 * would have to read them. 405 * 406 * Instead, ask "tcpdump-workers@tcpdump.org" for a new DLT_ value, 407 * as per the comment above, and use the type you're given. 408 */ 409 #define DLT_USER0 147 410 #define DLT_USER1 148 411 #define DLT_USER2 149 412 #define DLT_USER3 150 413 #define DLT_USER4 151 414 #define DLT_USER5 152 415 #define DLT_USER6 153 416 #define DLT_USER7 154 417 #define DLT_USER8 155 418 #define DLT_USER9 156 419 #define DLT_USER10 157 420 #define DLT_USER11 158 421 #define DLT_USER12 159 422 #define DLT_USER13 160 423 #define DLT_USER14 161 424 #define DLT_USER15 162 425 426 /* 427 * For future use with 802.11 captures - defined by AbsoluteValue 428 * Systems to store a number of bits of link-layer information 429 * including radio information: 430 * 431 * http://www.shaftnet.org/~pizza/software/capturefrm.txt 432 * 433 * but it might be used by some non-AVS drivers now or in the 434 * future. 435 */ 436 #define DLT_IEEE802_11_RADIO_AVS 163 /* 802.11 plus AVS radio header */ 437 438 /* 439 * Juniper-private data link type, as per request from 440 * Hannes Gredler <hannes@juniper.net>. The DLT_s are used 441 * for passing on chassis-internal metainformation such as 442 * QOS profiles, etc.. 443 */ 444 #define DLT_JUNIPER_MONITOR 164 445 446 /* 447 * Reserved for BACnet MS/TP. 448 */ 449 #define DLT_BACNET_MS_TP 165 450 451 /* 452 * Another PPP variant as per request from Karsten Keil <kkeil@suse.de>. 453 * 454 * This is used in some OSes to allow a kernel socket filter to distinguish 455 * between incoming and outgoing packets, on a socket intended to 456 * supply pppd with outgoing packets so it can do dial-on-demand and 457 * hangup-on-lack-of-demand; incoming packets are filtered out so they 458 * don't cause pppd to hold the connection up (you don't want random 459 * input packets such as port scans, packets from old lost connections, 460 * etc. to force the connection to stay up). 461 * 462 * The first byte of the PPP header (0xff03) is modified to accomodate 463 * the direction - 0x00 = IN, 0x01 = OUT. 464 */ 465 #define DLT_PPP_PPPD 166 466 467 /* 468 * Names for backwards compatibility with older versions of some PPP 469 * software; new software should use DLT_PPP_PPPD. 470 */ 471 #define DLT_PPP_WITH_DIRECTION DLT_PPP_PPPD 472 #define DLT_LINUX_PPP_WITHDIRECTION DLT_PPP_PPPD 473 474 /* 475 * Juniper-private data link type, as per request from 476 * Hannes Gredler <hannes@juniper.net>. The DLT_s are used 477 * for passing on chassis-internal metainformation such as 478 * QOS profiles, cookies, etc.. 479 */ 480 #define DLT_JUNIPER_PPPOE 167 481 #define DLT_JUNIPER_PPPOE_ATM 168 482 483 #define DLT_GPRS_LLC 169 /* GPRS LLC */ 484 #define DLT_GPF_T 170 /* GPF-T (ITU-T G.7041/Y.1303) */ 485 #define DLT_GPF_F 171 /* GPF-F (ITU-T G.7041/Y.1303) */ 486 487 /* 488 * Requested by Oolan Zimmer <oz@gcom.com> for use in Gcom's T1/E1 line 489 * monitoring equipment. 490 */ 491 #define DLT_GCOM_T1E1 172 492 #define DLT_GCOM_SERIAL 173 493 494 /* 495 * Juniper-private data link type, as per request from 496 * Hannes Gredler <hannes@juniper.net>. The DLT_ is used 497 * for internal communication to Physical Interface Cards (PIC) 498 */ 499 #define DLT_JUNIPER_PIC_PEER 174 500 501 /* 502 * Link types requested by Gregor Maier <gregor@endace.com> of Endace 503 * Measurement Systems. They add an ERF header (see 504 * http://www.endace.com/support/EndaceRecordFormat.pdf) in front of 505 * the link-layer header. 506 */ 507 #define DLT_ERF_ETH 175 /* Ethernet */ 508 #define DLT_ERF_POS 176 /* Packet-over-SONET */ 509 510 /* 511 * The instruction encodings. 512 */ 513 /* instruction classes */ 514 #define BPF_CLASS(code) ((code) & 0x07) 515 #define BPF_LD 0x00 516 #define BPF_LDX 0x01 517 #define BPF_ST 0x02 518 #define BPF_STX 0x03 519 #define BPF_ALU 0x04 520 #define BPF_JMP 0x05 521 #define BPF_RET 0x06 522 #define BPF_MISC 0x07 523 524 /* ld/ldx fields */ 525 #define BPF_SIZE(code) ((code) & 0x18) 526 #define BPF_W 0x00 527 #define BPF_H 0x08 528 #define BPF_B 0x10 529 #define BPF_MODE(code) ((code) & 0xe0) 530 #define BPF_IMM 0x00 531 #define BPF_ABS 0x20 532 #define BPF_IND 0x40 533 #define BPF_MEM 0x60 534 #define BPF_LEN 0x80 535 #define BPF_MSH 0xa0 536 537 /* alu/jmp fields */ 538 #define BPF_OP(code) ((code) & 0xf0) 539 #define BPF_ADD 0x00 540 #define BPF_SUB 0x10 541 #define BPF_MUL 0x20 542 #define BPF_DIV 0x30 543 #define BPF_OR 0x40 544 #define BPF_AND 0x50 545 #define BPF_LSH 0x60 546 #define BPF_RSH 0x70 547 #define BPF_NEG 0x80 548 #define BPF_JA 0x00 549 #define BPF_JEQ 0x10 550 #define BPF_JGT 0x20 551 #define BPF_JGE 0x30 552 #define BPF_JSET 0x40 553 #define BPF_SRC(code) ((code) & 0x08) 554 #define BPF_K 0x00 555 #define BPF_X 0x08 556 557 /* ret - BPF_K and BPF_X also apply */ 558 #define BPF_RVAL(code) ((code) & 0x18) 559 #define BPF_A 0x10 560 561 /* misc */ 562 #define BPF_MISCOP(code) ((code) & 0xf8) 563 #define BPF_TAX 0x00 564 #define BPF_TXA 0x80 565 566 /* 567 * The instruction data structure. 568 */ 569 struct bpf_insn { 570 u_short code; 571 u_char jt; 572 u_char jf; 573 bpf_u_int32 k; 574 }; 575 576 /* 577 * Macros for insn array initializers. 578 */ 579 #define BPF_STMT(code, k) { (u_short)(code), 0, 0, k } 580 #define BPF_JUMP(code, k, jt, jf) { (u_short)(code), jt, jf, k } 581 582 /* 583 * Structure to retrieve available DLTs for the interface. 584 */ 585 struct bpf_dltlist { 586 u_int bfl_len; /* number of bfd_list array */ 587 u_int *bfl_list; /* array of DLTs */ 588 }; 589 590 #ifdef _KERNEL 591 struct bpf_if; 592 int bpf_validate(const struct bpf_insn *, int); 593 void bpf_tap(struct bpf_if *, u_char *, u_int); 594 void bpf_mtap(struct bpf_if *, struct mbuf *); 595 void bpf_mtap2(struct bpf_if *, void *, u_int, struct mbuf *); 596 void bpfattach(struct ifnet *, u_int, u_int); 597 void bpfattach2(struct ifnet *, u_int, u_int, struct bpf_if **); 598 void bpfdetach(struct ifnet *); 599 600 void bpfilterattach(int); 601 u_int bpf_filter(const struct bpf_insn *, u_char *, u_int, u_int); 602 603 #define BPF_TAP(_ifp,_pkt,_pktlen) do { \ 604 if ((_ifp)->if_bpf) \ 605 bpf_tap((_ifp)->if_bpf, (_pkt), (_pktlen)); \ 606 } while (0) 607 #define BPF_MTAP(_ifp,_m) do { \ 608 if ((_ifp)->if_bpf) { \ 609 M_ASSERTVALID(_m); \ 610 bpf_mtap((_ifp)->if_bpf, (_m)); \ 611 } \ 612 } while (0) 613 #define BPF_MTAP2(_ifp,_data,_dlen,_m) do { \ 614 if ((_ifp)->if_bpf) { \ 615 M_ASSERTVALID(_m); \ 616 bpf_mtap2((_ifp)->if_bpf,(_data),(_dlen),(_m)); \ 617 } \ 618 } while (0) 619 #endif 620 621 /* 622 * Number of scratch memory words (for BPF_LD|BPF_MEM and BPF_ST). 623 */ 624 #define BPF_MEMWORDS 16 625 626 #endif /* _NET_BPF_H_ */ 627