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 /* 96 * Historically, BPF has supported a single buffering model, first using mbuf 97 * clusters in kernel, and later using malloc(9) buffers in kernel. We now 98 * support multiple buffering modes, which may be queried and set using 99 * BIOCGETBUFMODE and BIOCSETBUFMODE. So as to avoid handling the complexity 100 * of changing modes while sniffing packets, the mode becomes fixed once an 101 * interface has been attached to the BPF descriptor. 102 */ 103 #define BPF_BUFMODE_BUFFER 1 /* Kernel buffers with read(). */ 104 #define BPF_BUFMODE_ZBUF 2 /* Zero-copy buffers. */ 105 106 /*- 107 * Struct used by BIOCSETZBUF, BIOCROTZBUF: describes up to two zero-copy 108 * buffer as used by BPF. 109 */ 110 struct bpf_zbuf { 111 void *bz_bufa; /* Location of 'a' zero-copy buffer. */ 112 void *bz_bufb; /* Location of 'b' zero-copy buffer. */ 113 size_t bz_buflen; /* Size of zero-copy buffers. */ 114 }; 115 116 #define BIOCGBLEN _IOR('B',102, u_int) 117 #define BIOCSBLEN _IOWR('B',102, u_int) 118 #define BIOCSETF _IOW('B',103, struct bpf_program) 119 #define BIOCFLUSH _IO('B',104) 120 #define BIOCPROMISC _IO('B',105) 121 #define BIOCGDLT _IOR('B',106, u_int) 122 #define BIOCGETIF _IOR('B',107, struct ifreq) 123 #define BIOCSETIF _IOW('B',108, struct ifreq) 124 #define BIOCSRTIMEOUT _IOW('B',109, struct timeval) 125 #define BIOCGRTIMEOUT _IOR('B',110, struct timeval) 126 #define BIOCGSTATS _IOR('B',111, struct bpf_stat) 127 #define BIOCIMMEDIATE _IOW('B',112, u_int) 128 #define BIOCVERSION _IOR('B',113, struct bpf_version) 129 #define BIOCGRSIG _IOR('B',114, u_int) 130 #define BIOCSRSIG _IOW('B',115, u_int) 131 #define BIOCGHDRCMPLT _IOR('B',116, u_int) 132 #define BIOCSHDRCMPLT _IOW('B',117, u_int) 133 #define BIOCGDIRECTION _IOR('B',118, u_int) 134 #define BIOCSDIRECTION _IOW('B',119, u_int) 135 #define BIOCSDLT _IOW('B',120, u_int) 136 #define BIOCGDLTLIST _IOWR('B',121, struct bpf_dltlist) 137 #define BIOCLOCK _IO('B', 122) 138 #define BIOCSETWF _IOW('B',123, struct bpf_program) 139 #define BIOCFEEDBACK _IOW('B',124, u_int) 140 #define BIOCGETBUFMODE _IOR('B',125, u_int) 141 #define BIOCSETBUFMODE _IOW('B',126, u_int) 142 #define BIOCGETZMAX _IOR('B',127, size_t) 143 #define BIOCROTZBUF _IOR('B',128, struct bpf_zbuf) 144 #define BIOCSETZBUF _IOW('B',129, struct bpf_zbuf) 145 #define BIOCSETFNR _IOW('B',130, struct bpf_program) 146 147 /* Obsolete */ 148 #define BIOCGSEESENT BIOCGDIRECTION 149 #define BIOCSSEESENT BIOCSDIRECTION 150 151 /* Packet directions */ 152 enum bpf_direction { 153 BPF_D_IN, /* See incoming packets */ 154 BPF_D_INOUT, /* See incoming and outgoing packets */ 155 BPF_D_OUT /* See outgoing packets */ 156 }; 157 158 /* 159 * Structure prepended to each packet. 160 */ 161 struct bpf_hdr { 162 struct timeval bh_tstamp; /* time stamp */ 163 bpf_u_int32 bh_caplen; /* length of captured portion */ 164 bpf_u_int32 bh_datalen; /* original length of packet */ 165 u_short bh_hdrlen; /* length of bpf header (this struct 166 plus alignment padding) */ 167 }; 168 /* 169 * Because the structure above is not a multiple of 4 bytes, some compilers 170 * will insist on inserting padding; hence, sizeof(struct bpf_hdr) won't work. 171 * Only the kernel needs to know about it; applications use bh_hdrlen. 172 */ 173 #ifdef _KERNEL 174 #define SIZEOF_BPF_HDR (sizeof(struct bpf_hdr) <= 20 ? 18 : \ 175 sizeof(struct bpf_hdr)) 176 #endif 177 178 /* 179 * When using zero-copy BPF buffers, a shared memory header is present 180 * allowing the kernel BPF implementation and user process to synchronize 181 * without using system calls. This structure defines that header. When 182 * accessing these fields, appropriate atomic operation and memory barriers 183 * are required in order not to see stale or out-of-order data; see bpf(4) 184 * for reference code to access these fields from userspace. 185 * 186 * The layout of this structure is critical, and must not be changed; if must 187 * fit in a single page on all architectures. 188 */ 189 struct bpf_zbuf_header { 190 volatile u_int bzh_kernel_gen; /* Kernel generation number. */ 191 volatile u_int bzh_kernel_len; /* Length of data in the buffer. */ 192 volatile u_int bzh_user_gen; /* User generation number. */ 193 u_int _bzh_pad[5]; 194 }; 195 196 /* 197 * Data-link level type codes. 198 */ 199 #define DLT_NULL 0 /* BSD loopback encapsulation */ 200 #define DLT_EN10MB 1 /* Ethernet (10Mb) */ 201 #define DLT_EN3MB 2 /* Experimental Ethernet (3Mb) */ 202 #define DLT_AX25 3 /* Amateur Radio AX.25 */ 203 #define DLT_PRONET 4 /* Proteon ProNET Token Ring */ 204 #define DLT_CHAOS 5 /* Chaos */ 205 #define DLT_IEEE802 6 /* IEEE 802 Networks */ 206 #define DLT_ARCNET 7 /* ARCNET */ 207 #define DLT_SLIP 8 /* Serial Line IP */ 208 #define DLT_PPP 9 /* Point-to-point Protocol */ 209 #define DLT_FDDI 10 /* FDDI */ 210 #define DLT_ATM_RFC1483 11 /* LLC/SNAP encapsulated atm */ 211 #define DLT_RAW 12 /* raw IP */ 212 213 /* 214 * These are values from BSD/OS's "bpf.h". 215 * These are not the same as the values from the traditional libpcap 216 * "bpf.h"; however, these values shouldn't be generated by any 217 * OS other than BSD/OS, so the correct values to use here are the 218 * BSD/OS values. 219 * 220 * Platforms that have already assigned these values to other 221 * DLT_ codes, however, should give these codes the values 222 * from that platform, so that programs that use these codes will 223 * continue to compile - even though they won't correctly read 224 * files of these types. 225 */ 226 #define DLT_SLIP_BSDOS 15 /* BSD/OS Serial Line IP */ 227 #define DLT_PPP_BSDOS 16 /* BSD/OS Point-to-point Protocol */ 228 229 #define DLT_ATM_CLIP 19 /* Linux Classical-IP over ATM */ 230 231 /* 232 * These values are defined by NetBSD; other platforms should refrain from 233 * using them for other purposes, so that NetBSD savefiles with link 234 * types of 50 or 51 can be read as this type on all platforms. 235 */ 236 #define DLT_PPP_SERIAL 50 /* PPP over serial with HDLC encapsulation */ 237 #define DLT_PPP_ETHER 51 /* PPP over Ethernet */ 238 239 /* 240 * Reserved for the Symantec Enterprise Firewall. 241 */ 242 #define DLT_SYMANTEC_FIREWALL 99 243 244 245 /* 246 * This value was defined by libpcap 0.5; platforms that have defined 247 * it with a different value should define it here with that value - 248 * a link type of 104 in a save file will be mapped to DLT_C_HDLC, 249 * whatever value that happens to be, so programs will correctly 250 * handle files with that link type regardless of the value of 251 * DLT_C_HDLC. 252 * 253 * The name DLT_C_HDLC was used by BSD/OS; we use that name for source 254 * compatibility with programs written for BSD/OS. 255 * 256 * libpcap 0.5 defined it as DLT_CHDLC; we define DLT_CHDLC as well, 257 * for source compatibility with programs written for libpcap 0.5. 258 */ 259 #define DLT_C_HDLC 104 /* Cisco HDLC */ 260 #define DLT_CHDLC DLT_C_HDLC 261 262 #define DLT_IEEE802_11 105 /* IEEE 802.11 wireless */ 263 264 /* 265 * Values between 106 and 107 are used in capture file headers as 266 * link-layer types corresponding to DLT_ types that might differ 267 * between platforms; don't use those values for new DLT_ new types. 268 */ 269 270 /* 271 * Frame Relay; BSD/OS has a DLT_FR with a value of 11, but that collides 272 * with other values. 273 * DLT_FR and DLT_FRELAY packets start with the Q.922 Frame Relay header 274 * (DLCI, etc.). 275 */ 276 #define DLT_FRELAY 107 277 278 /* 279 * OpenBSD DLT_LOOP, for loopback devices; it's like DLT_NULL, except 280 * that the AF_ type in the link-layer header is in network byte order. 281 * 282 * OpenBSD defines it as 12, but that collides with DLT_RAW, so we 283 * define it as 108 here. If OpenBSD picks up this file, it should 284 * define DLT_LOOP as 12 in its version, as per the comment above - 285 * and should not use 108 as a DLT_ value. 286 */ 287 #define DLT_LOOP 108 288 289 /* 290 * Values between 109 and 112 are used in capture file headers as 291 * link-layer types corresponding to DLT_ types that might differ 292 * between platforms; don't use those values for new DLT_ new types. 293 */ 294 295 /* 296 * Encapsulated packets for IPsec; DLT_ENC is 13 in OpenBSD, but that's 297 * DLT_SLIP_BSDOS in NetBSD, so we don't use 13 for it in OSes other 298 * than OpenBSD. 299 */ 300 #define DLT_ENC 109 301 302 /* 303 * This is for Linux cooked sockets. 304 */ 305 #define DLT_LINUX_SLL 113 306 307 /* 308 * Apple LocalTalk hardware. 309 */ 310 #define DLT_LTALK 114 311 312 /* 313 * Acorn Econet. 314 */ 315 #define DLT_ECONET 115 316 317 /* 318 * Reserved for use with OpenBSD ipfilter. 319 */ 320 #define DLT_IPFILTER 116 321 322 /* 323 * Reserved for use in capture-file headers as a link-layer type 324 * corresponding to OpenBSD DLT_PFLOG; DLT_PFLOG is 17 in OpenBSD, 325 * but that's DLT_LANE8023 in SuSE 6.3, so we can't use 17 for it 326 * in capture-file headers. 327 */ 328 #define DLT_PFLOG 117 329 330 /* 331 * Registered for Cisco-internal use. 332 */ 333 #define DLT_CISCO_IOS 118 334 335 /* 336 * Reserved for 802.11 cards using the Prism II chips, with a link-layer 337 * header including Prism monitor mode information plus an 802.11 338 * header. 339 */ 340 #define DLT_PRISM_HEADER 119 341 342 /* 343 * Reserved for Aironet 802.11 cards, with an Aironet link-layer header 344 * (see Doug Ambrisko's FreeBSD patches). 345 */ 346 #define DLT_AIRONET_HEADER 120 347 348 /* 349 * Reserved for use by OpenBSD's pfsync device. 350 */ 351 #define DLT_PFSYNC 121 352 353 /* 354 * Reserved for Siemens HiPath HDLC. XXX 355 */ 356 #define DLT_HHDLC 121 357 358 /* 359 * Reserved for RFC 2625 IP-over-Fibre Channel. 360 */ 361 #define DLT_IP_OVER_FC 122 362 363 /* 364 * Reserved for Full Frontal ATM on Solaris. 365 */ 366 #define DLT_SUNATM 123 367 368 /* 369 * Reserved as per request from Kent Dahlgren <kent@praesum.com> 370 * for private use. 371 */ 372 #define DLT_RIO 124 /* RapidIO */ 373 #define DLT_PCI_EXP 125 /* PCI Express */ 374 #define DLT_AURORA 126 /* Xilinx Aurora link layer */ 375 376 /* 377 * BSD header for 802.11 plus a number of bits of link-layer information 378 * including radio information. 379 */ 380 #ifndef DLT_IEEE802_11_RADIO 381 #define DLT_IEEE802_11_RADIO 127 382 #endif 383 384 /* 385 * Reserved for TZSP encapsulation. 386 */ 387 #define DLT_TZSP 128 /* Tazmen Sniffer Protocol */ 388 389 /* 390 * Reserved for Linux ARCNET. 391 */ 392 #define DLT_ARCNET_LINUX 129 393 394 /* 395 * Juniper-private data link types. 396 */ 397 #define DLT_JUNIPER_MLPPP 130 398 #define DLT_JUNIPER_MLFR 131 399 #define DLT_JUNIPER_ES 132 400 #define DLT_JUNIPER_GGSN 133 401 #define DLT_JUNIPER_MFR 134 402 #define DLT_JUNIPER_ATM2 135 403 #define DLT_JUNIPER_SERVICES 136 404 #define DLT_JUNIPER_ATM1 137 405 406 /* 407 * Apple IP-over-IEEE 1394, as per a request from Dieter Siegmund 408 * <dieter@apple.com>. The header that's presented is an Ethernet-like 409 * header: 410 * 411 * #define FIREWIRE_EUI64_LEN 8 412 * struct firewire_header { 413 * u_char firewire_dhost[FIREWIRE_EUI64_LEN]; 414 * u_char firewire_shost[FIREWIRE_EUI64_LEN]; 415 * u_short firewire_type; 416 * }; 417 * 418 * with "firewire_type" being an Ethernet type value, rather than, 419 * for example, raw GASP frames being handed up. 420 */ 421 #define DLT_APPLE_IP_OVER_IEEE1394 138 422 423 /* 424 * Various SS7 encapsulations, as per a request from Jeff Morriss 425 * <jeff.morriss[AT]ulticom.com> and subsequent discussions. 426 */ 427 #define DLT_MTP2_WITH_PHDR 139 /* pseudo-header with various info, followed by MTP2 */ 428 #define DLT_MTP2 140 /* MTP2, without pseudo-header */ 429 #define DLT_MTP3 141 /* MTP3, without pseudo-header or MTP2 */ 430 #define DLT_SCCP 142 /* SCCP, without pseudo-header or MTP2 or MTP3 */ 431 432 /* 433 * Reserved for DOCSIS. 434 */ 435 #define DLT_DOCSIS 143 436 437 /* 438 * Reserved for Linux IrDA. 439 */ 440 #define DLT_LINUX_IRDA 144 441 442 /* 443 * Reserved for IBM SP switch and IBM Next Federation switch. 444 */ 445 #define DLT_IBM_SP 145 446 #define DLT_IBM_SN 146 447 448 /* 449 * Reserved for private use. If you have some link-layer header type 450 * that you want to use within your organization, with the capture files 451 * using that link-layer header type not ever be sent outside your 452 * organization, you can use these values. 453 * 454 * No libpcap release will use these for any purpose, nor will any 455 * tcpdump release use them, either. 456 * 457 * Do *NOT* use these in capture files that you expect anybody not using 458 * your private versions of capture-file-reading tools to read; in 459 * particular, do *NOT* use them in products, otherwise you may find that 460 * people won't be able to use tcpdump, or snort, or Ethereal, or... to 461 * read capture files from your firewall/intrusion detection/traffic 462 * monitoring/etc. appliance, or whatever product uses that DLT_ value, 463 * and you may also find that the developers of those applications will 464 * not accept patches to let them read those files. 465 * 466 * Also, do not use them if somebody might send you a capture using them 467 * for *their* private type and tools using them for *your* private type 468 * would have to read them. 469 * 470 * Instead, ask "tcpdump-workers@tcpdump.org" for a new DLT_ value, 471 * as per the comment above, and use the type you're given. 472 */ 473 #define DLT_USER0 147 474 #define DLT_USER1 148 475 #define DLT_USER2 149 476 #define DLT_USER3 150 477 #define DLT_USER4 151 478 #define DLT_USER5 152 479 #define DLT_USER6 153 480 #define DLT_USER7 154 481 #define DLT_USER8 155 482 #define DLT_USER9 156 483 #define DLT_USER10 157 484 #define DLT_USER11 158 485 #define DLT_USER12 159 486 #define DLT_USER13 160 487 #define DLT_USER14 161 488 #define DLT_USER15 162 489 490 /* 491 * For future use with 802.11 captures - defined by AbsoluteValue 492 * Systems to store a number of bits of link-layer information 493 * including radio information: 494 * 495 * http://www.shaftnet.org/~pizza/software/capturefrm.txt 496 * 497 * but it might be used by some non-AVS drivers now or in the 498 * future. 499 */ 500 #define DLT_IEEE802_11_RADIO_AVS 163 /* 802.11 plus AVS radio header */ 501 502 /* 503 * Juniper-private data link type, as per request from 504 * Hannes Gredler <hannes@juniper.net>. The DLT_s are used 505 * for passing on chassis-internal metainformation such as 506 * QOS profiles, etc.. 507 */ 508 #define DLT_JUNIPER_MONITOR 164 509 510 /* 511 * Reserved for BACnet MS/TP. 512 */ 513 #define DLT_BACNET_MS_TP 165 514 515 /* 516 * Another PPP variant as per request from Karsten Keil <kkeil@suse.de>. 517 * 518 * This is used in some OSes to allow a kernel socket filter to distinguish 519 * between incoming and outgoing packets, on a socket intended to 520 * supply pppd with outgoing packets so it can do dial-on-demand and 521 * hangup-on-lack-of-demand; incoming packets are filtered out so they 522 * don't cause pppd to hold the connection up (you don't want random 523 * input packets such as port scans, packets from old lost connections, 524 * etc. to force the connection to stay up). 525 * 526 * The first byte of the PPP header (0xff03) is modified to accomodate 527 * the direction - 0x00 = IN, 0x01 = OUT. 528 */ 529 #define DLT_PPP_PPPD 166 530 531 /* 532 * Names for backwards compatibility with older versions of some PPP 533 * software; new software should use DLT_PPP_PPPD. 534 */ 535 #define DLT_PPP_WITH_DIRECTION DLT_PPP_PPPD 536 #define DLT_LINUX_PPP_WITHDIRECTION DLT_PPP_PPPD 537 538 /* 539 * Juniper-private data link type, as per request from 540 * Hannes Gredler <hannes@juniper.net>. The DLT_s are used 541 * for passing on chassis-internal metainformation such as 542 * QOS profiles, cookies, etc.. 543 */ 544 #define DLT_JUNIPER_PPPOE 167 545 #define DLT_JUNIPER_PPPOE_ATM 168 546 547 #define DLT_GPRS_LLC 169 /* GPRS LLC */ 548 #define DLT_GPF_T 170 /* GPF-T (ITU-T G.7041/Y.1303) */ 549 #define DLT_GPF_F 171 /* GPF-F (ITU-T G.7041/Y.1303) */ 550 551 /* 552 * Requested by Oolan Zimmer <oz@gcom.com> for use in Gcom's T1/E1 line 553 * monitoring equipment. 554 */ 555 #define DLT_GCOM_T1E1 172 556 #define DLT_GCOM_SERIAL 173 557 558 /* 559 * Juniper-private data link type, as per request from 560 * Hannes Gredler <hannes@juniper.net>. The DLT_ is used 561 * for internal communication to Physical Interface Cards (PIC) 562 */ 563 #define DLT_JUNIPER_PIC_PEER 174 564 565 /* 566 * Link types requested by Gregor Maier <gregor@endace.com> of Endace 567 * Measurement Systems. They add an ERF header (see 568 * http://www.endace.com/support/EndaceRecordFormat.pdf) in front of 569 * the link-layer header. 570 */ 571 #define DLT_ERF_ETH 175 /* Ethernet */ 572 #define DLT_ERF_POS 176 /* Packet-over-SONET */ 573 574 /* 575 * Requested by Daniele Orlandi <daniele@orlandi.com> for raw LAPD 576 * for vISDN (http://www.orlandi.com/visdn/). Its link-layer header 577 * includes additional information before the LAPD header, so it's 578 * not necessarily a generic LAPD header. 579 */ 580 #define DLT_LINUX_LAPD 177 581 582 /* 583 * Juniper-private data link type, as per request from 584 * Hannes Gredler <hannes@juniper.net>. 585 * The DLT_ are used for prepending meta-information 586 * like interface index, interface name 587 * before standard Ethernet, PPP, Frelay & C-HDLC Frames 588 */ 589 #define DLT_JUNIPER_ETHER 178 590 #define DLT_JUNIPER_PPP 179 591 #define DLT_JUNIPER_FRELAY 180 592 #define DLT_JUNIPER_CHDLC 181 593 594 /* 595 * Multi Link Frame Relay (FRF.16) 596 */ 597 #define DLT_MFR 182 598 599 /* 600 * Juniper-private data link type, as per request from 601 * Hannes Gredler <hannes@juniper.net>. 602 * The DLT_ is used for internal communication with a 603 * voice Adapter Card (PIC) 604 */ 605 #define DLT_JUNIPER_VP 183 606 607 /* 608 * Arinc 429 frames. 609 * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>. 610 * Every frame contains a 32bit A429 label. 611 * More documentation on Arinc 429 can be found at 612 * http://www.condoreng.com/support/downloads/tutorials/ARINCTutorial.pdf 613 */ 614 #define DLT_A429 184 615 616 /* 617 * Arinc 653 Interpartition Communication messages. 618 * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>. 619 * Please refer to the A653-1 standard for more information. 620 */ 621 #define DLT_A653_ICM 185 622 623 /* 624 * USB packets, beginning with a USB setup header; requested by 625 * Paolo Abeni <paolo.abeni@email.it>. 626 */ 627 #define DLT_USB 186 628 629 /* 630 * Bluetooth HCI UART transport layer (part H:4); requested by 631 * Paolo Abeni. 632 */ 633 #define DLT_BLUETOOTH_HCI_H4 187 634 635 /* 636 * IEEE 802.16 MAC Common Part Sublayer; requested by Maria Cruz 637 * <cruz_petagay@bah.com>. 638 */ 639 #define DLT_IEEE802_16_MAC_CPS 188 640 641 /* 642 * USB packets, beginning with a Linux USB header; requested by 643 * Paolo Abeni <paolo.abeni@email.it>. 644 */ 645 #define DLT_USB_LINUX 189 646 647 /* 648 * Controller Area Network (CAN) v. 2.0B packets. 649 * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>. 650 * Used to dump CAN packets coming from a CAN Vector board. 651 * More documentation on the CAN v2.0B frames can be found at 652 * http://www.can-cia.org/downloads/?269 653 */ 654 #define DLT_CAN20B 190 655 656 /* 657 * IEEE 802.15.4, with address fields padded, as is done by Linux 658 * drivers; requested by Juergen Schimmer. 659 */ 660 #define DLT_IEEE802_15_4_LINUX 191 661 662 /* 663 * Per Packet Information encapsulated packets. 664 * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>. 665 */ 666 #define DLT_PPI 192 667 668 /* 669 * Header for 802.16 MAC Common Part Sublayer plus a radiotap radio header; 670 * requested by Charles Clancy. 671 */ 672 #define DLT_IEEE802_16_MAC_CPS_RADIO 193 673 674 /* 675 * Juniper-private data link type, as per request from 676 * Hannes Gredler <hannes@juniper.net>. 677 * The DLT_ is used for internal communication with a 678 * integrated service module (ISM). 679 */ 680 #define DLT_JUNIPER_ISM 194 681 682 /* 683 * IEEE 802.15.4, exactly as it appears in the spec (no padding, no 684 * nothing); requested by Mikko Saarnivala <mikko.saarnivala@sensinode.com>. 685 */ 686 #define DLT_IEEE802_15_4 195 687 688 /* 689 * Various link-layer types, with a pseudo-header, for SITA 690 * (http://www.sita.aero/); requested by Fulko Hew (fulko.hew@gmail.com). 691 */ 692 #define DLT_SITA 196 693 694 /* 695 * Various link-layer types, with a pseudo-header, for Endace DAG cards; 696 * encapsulates Endace ERF records. Requested by Stephen Donnelly 697 * <stephen@endace.com>. 698 */ 699 #define DLT_ERF 197 700 701 /* 702 * Special header prepended to Ethernet packets when capturing from a 703 * u10 Networks board. Requested by Phil Mulholland 704 * <phil@u10networks.com>. 705 */ 706 #define DLT_RAIF1 198 707 708 /* 709 * IPMB packet for IPMI, beginning with the I2C slave address, followed 710 * by the netFn and LUN, etc.. Requested by Chanthy Toeung 711 * <chanthy.toeung@ca.kontron.com>. 712 */ 713 #define DLT_IPMB 199 714 715 /* 716 * Juniper-private data link type, as per request from 717 * Hannes Gredler <hannes@juniper.net>. 718 * The DLT_ is used for capturing data on a secure tunnel interface. 719 */ 720 #define DLT_JUNIPER_ST 200 721 722 /* 723 * Bluetooth HCI UART transport layer (part H:4), with pseudo-header 724 * that includes direction information; requested by Paolo Abeni. 725 */ 726 #define DLT_BLUETOOTH_HCI_H4_WITH_PHDR 201 727 728 /* 729 * AX.25 packet with a 1-byte KISS header; see 730 * 731 * http://www.ax25.net/kiss.htm 732 * 733 * as per Richard Stearn <richard@rns-stearn.demon.co.uk>. 734 */ 735 #define DLT_AX25_KISS 202 736 737 /* 738 * LAPD packets from an ISDN channel, starting with the address field, 739 * with no pseudo-header. 740 * Requested by Varuna De Silva <varunax@gmail.com>. 741 */ 742 #define DLT_LAPD 203 743 744 /* 745 * Variants of various link-layer headers, with a one-byte direction 746 * pseudo-header prepended - zero means "received by this host", 747 * non-zero (any non-zero value) means "sent by this host" - as per 748 * Will Barker <w.barker@zen.co.uk>. 749 */ 750 #define DLT_PPP_WITH_DIR 204 /* PPP - don't confuse with DLT_PPP_WITH_DIRECTION */ 751 #define DLT_C_HDLC_WITH_DIR 205 /* Cisco HDLC */ 752 #define DLT_FRELAY_WITH_DIR 206 /* Frame Relay */ 753 #define DLT_LAPB_WITH_DIR 207 /* LAPB */ 754 755 /* 756 * 208 is reserved for an as-yet-unspecified proprietary link-layer 757 * type, as requested by Will Barker. 758 */ 759 760 /* 761 * IPMB with a Linux-specific pseudo-header; as requested by Alexey Neyman 762 * <avn@pigeonpoint.com>. 763 */ 764 #define DLT_IPMB_LINUX 209 765 766 /* 767 * FlexRay automotive bus - http://www.flexray.com/ - as requested 768 * by Hannes Kaelber <hannes.kaelber@x2e.de>. 769 */ 770 #define DLT_FLEXRAY 210 771 772 /* 773 * Media Oriented Systems Transport (MOST) bus for multimedia 774 * transport - http://www.mostcooperation.com/ - as requested 775 * by Hannes Kaelber <hannes.kaelber@x2e.de>. 776 */ 777 #define DLT_MOST 211 778 779 /* 780 * Local Interconnect Network (LIN) bus for vehicle networks - 781 * http://www.lin-subbus.org/ - as requested by Hannes Kaelber 782 * <hannes.kaelber@x2e.de>. 783 */ 784 #define DLT_LIN 212 785 786 /* 787 * X2E-private data link type used for serial line capture, 788 * as requested by Hannes Kaelber <hannes.kaelber@x2e.de>. 789 */ 790 #define DLT_X2E_SERIAL 213 791 792 /* 793 * X2E-private data link type used for the Xoraya data logger 794 * family, as requested by Hannes Kaelber <hannes.kaelber@x2e.de>. 795 */ 796 #define DLT_X2E_XORAYA 214 797 798 /* 799 * IEEE 802.15.4, exactly as it appears in the spec (no padding, no 800 * nothing), but with the PHY-level data for non-ASK PHYs (4 octets 801 * of 0 as preamble, one octet of SFD, one octet of frame length+ 802 * reserved bit, and then the MAC-layer data, starting with the 803 * frame control field). 804 * 805 * Requested by Max Filippov <jcmvbkbc@gmail.com>. 806 */ 807 #define DLT_IEEE802_15_4_NONASK_PHY 215 808 809 /* 810 * DLT and savefile link type values are split into a class and 811 * a member of that class. A class value of 0 indicates a regular 812 * DLT_/LINKTYPE_ value. 813 */ 814 #define DLT_CLASS(x) ((x) & 0x03ff0000) 815 816 /* 817 * The instruction encodings. 818 */ 819 /* instruction classes */ 820 #define BPF_CLASS(code) ((code) & 0x07) 821 #define BPF_LD 0x00 822 #define BPF_LDX 0x01 823 #define BPF_ST 0x02 824 #define BPF_STX 0x03 825 #define BPF_ALU 0x04 826 #define BPF_JMP 0x05 827 #define BPF_RET 0x06 828 #define BPF_MISC 0x07 829 830 /* ld/ldx fields */ 831 #define BPF_SIZE(code) ((code) & 0x18) 832 #define BPF_W 0x00 833 #define BPF_H 0x08 834 #define BPF_B 0x10 835 #define BPF_MODE(code) ((code) & 0xe0) 836 #define BPF_IMM 0x00 837 #define BPF_ABS 0x20 838 #define BPF_IND 0x40 839 #define BPF_MEM 0x60 840 #define BPF_LEN 0x80 841 #define BPF_MSH 0xa0 842 843 /* alu/jmp fields */ 844 #define BPF_OP(code) ((code) & 0xf0) 845 #define BPF_ADD 0x00 846 #define BPF_SUB 0x10 847 #define BPF_MUL 0x20 848 #define BPF_DIV 0x30 849 #define BPF_OR 0x40 850 #define BPF_AND 0x50 851 #define BPF_LSH 0x60 852 #define BPF_RSH 0x70 853 #define BPF_NEG 0x80 854 #define BPF_JA 0x00 855 #define BPF_JEQ 0x10 856 #define BPF_JGT 0x20 857 #define BPF_JGE 0x30 858 #define BPF_JSET 0x40 859 #define BPF_SRC(code) ((code) & 0x08) 860 #define BPF_K 0x00 861 #define BPF_X 0x08 862 863 /* ret - BPF_K and BPF_X also apply */ 864 #define BPF_RVAL(code) ((code) & 0x18) 865 #define BPF_A 0x10 866 867 /* misc */ 868 #define BPF_MISCOP(code) ((code) & 0xf8) 869 #define BPF_TAX 0x00 870 #define BPF_TXA 0x80 871 872 /* 873 * The instruction data structure. 874 */ 875 struct bpf_insn { 876 u_short code; 877 u_char jt; 878 u_char jf; 879 bpf_u_int32 k; 880 }; 881 882 /* 883 * Macros for insn array initializers. 884 */ 885 #define BPF_STMT(code, k) { (u_short)(code), 0, 0, k } 886 #define BPF_JUMP(code, k, jt, jf) { (u_short)(code), jt, jf, k } 887 888 /* 889 * Structure to retrieve available DLTs for the interface. 890 */ 891 struct bpf_dltlist { 892 u_int bfl_len; /* number of bfd_list array */ 893 u_int *bfl_list; /* array of DLTs */ 894 }; 895 896 #ifdef _KERNEL 897 #ifdef MALLOC_DECLARE 898 MALLOC_DECLARE(M_BPF); 899 #endif 900 #ifdef SYSCTL_DECL 901 SYSCTL_DECL(_net_bpf); 902 #endif 903 904 /* 905 * Rotate the packet buffers in descriptor d. Move the store buffer into the 906 * hold slot, and the free buffer ino the store slot. Zero the length of the 907 * new store buffer. Descriptor lock should be held. 908 */ 909 #define ROTATE_BUFFERS(d) do { \ 910 (d)->bd_hbuf = (d)->bd_sbuf; \ 911 (d)->bd_hlen = (d)->bd_slen; \ 912 (d)->bd_sbuf = (d)->bd_fbuf; \ 913 (d)->bd_slen = 0; \ 914 (d)->bd_fbuf = NULL; \ 915 bpf_bufheld(d); \ 916 } while (0) 917 918 /* 919 * Descriptor associated with each attached hardware interface. 920 */ 921 struct bpf_if { 922 LIST_ENTRY(bpf_if) bif_next; /* list of all interfaces */ 923 LIST_HEAD(, bpf_d) bif_dlist; /* descriptor list */ 924 u_int bif_dlt; /* link layer type */ 925 u_int bif_hdrlen; /* length of header (with padding) */ 926 struct ifnet *bif_ifp; /* corresponding interface */ 927 struct mtx bif_mtx; /* mutex for interface */ 928 }; 929 930 void bpf_bufheld(struct bpf_d *d); 931 int bpf_validate(const struct bpf_insn *, int); 932 void bpf_tap(struct bpf_if *, u_char *, u_int); 933 void bpf_mtap(struct bpf_if *, struct mbuf *); 934 void bpf_mtap2(struct bpf_if *, void *, u_int, struct mbuf *); 935 void bpfattach(struct ifnet *, u_int, u_int); 936 void bpfattach2(struct ifnet *, u_int, u_int, struct bpf_if **); 937 void bpfdetach(struct ifnet *); 938 939 void bpfilterattach(int); 940 u_int bpf_filter(const struct bpf_insn *, u_char *, u_int, u_int); 941 942 static __inline int 943 bpf_peers_present(struct bpf_if *bpf) 944 { 945 946 if (!LIST_EMPTY(&bpf->bif_dlist)) 947 return (1); 948 return (0); 949 } 950 951 #define BPF_TAP(_ifp,_pkt,_pktlen) do { \ 952 if (bpf_peers_present((_ifp)->if_bpf)) \ 953 bpf_tap((_ifp)->if_bpf, (_pkt), (_pktlen)); \ 954 } while (0) 955 #define BPF_MTAP(_ifp,_m) do { \ 956 if (bpf_peers_present((_ifp)->if_bpf)) { \ 957 M_ASSERTVALID(_m); \ 958 bpf_mtap((_ifp)->if_bpf, (_m)); \ 959 } \ 960 } while (0) 961 #define BPF_MTAP2(_ifp,_data,_dlen,_m) do { \ 962 if (bpf_peers_present((_ifp)->if_bpf)) { \ 963 M_ASSERTVALID(_m); \ 964 bpf_mtap2((_ifp)->if_bpf,(_data),(_dlen),(_m)); \ 965 } \ 966 } while (0) 967 #endif 968 969 /* 970 * Number of scratch memory words (for BPF_LD|BPF_MEM and BPF_ST). 971 */ 972 #define BPF_MEMWORDS 16 973 974 #endif /* _NET_BPF_H_ */ 975