Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/i386/isa/if_wireg.h
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1 /* 2 * Copyright (c) 1997, 1998, 1999 3 * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Bill Paul. 16 * 4. Neither the name of the author nor the names of any co-contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 * 32 * $FreeBSD$ 33 */ 34 35 struct wi_counters { 36 u_int32_t wi_tx_unicast_frames; 37 u_int32_t wi_tx_multicast_frames; 38 u_int32_t wi_tx_fragments; 39 u_int32_t wi_tx_unicast_octets; 40 u_int32_t wi_tx_multicast_octets; 41 u_int32_t wi_tx_deferred_xmits; 42 u_int32_t wi_tx_single_retries; 43 u_int32_t wi_tx_multi_retries; 44 u_int32_t wi_tx_retry_limit; 45 u_int32_t wi_tx_discards; 46 u_int32_t wi_rx_unicast_frames; 47 u_int32_t wi_rx_multicast_frames; 48 u_int32_t wi_rx_fragments; 49 u_int32_t wi_rx_unicast_octets; 50 u_int32_t wi_rx_multicast_octets; 51 u_int32_t wi_rx_fcs_errors; 52 u_int32_t wi_rx_discards_nobuf; 53 u_int32_t wi_tx_discards_wrong_sa; 54 u_int32_t wi_rx_WEP_cant_decrypt; 55 u_int32_t wi_rx_msg_in_msg_frags; 56 u_int32_t wi_rx_msg_in_bad_msg_frags; 57 }; 58 59 struct wi_softc { 60 struct arpcom arpcom; 61 struct ifmedia ifmedia; 62 int wi_unit; 63 bus_space_handle_t wi_bhandle; 64 bus_space_tag_t wi_btag; 65 int wi_tx_data_id; 66 int wi_tx_mgmt_id; 67 int wi_gone; 68 int wi_if_flags; 69 u_int16_t wi_ptype; 70 u_int16_t wi_portnum; 71 u_int16_t wi_max_data_len; 72 u_int16_t wi_rts_thresh; 73 u_int16_t wi_ap_density; 74 u_int16_t wi_tx_rate; 75 u_int16_t wi_create_ibss; 76 u_int16_t wi_channel; 77 u_int16_t wi_pm_enabled; 78 u_int16_t wi_max_sleep; 79 char wi_node_name[32]; 80 char wi_net_name[32]; 81 char wi_ibss_name[32]; 82 u_int8_t wi_txbuf[1536]; 83 struct wi_counters wi_stats; 84 struct callout_handle wi_stat_ch; 85 }; 86 87 #define WI_TIMEOUT 65536 88 89 #define WI_PORT0 0 90 #define WI_PORT1 1 91 #define WI_PORT2 2 92 #define WI_PORT3 3 93 #define WI_PORT4 4 94 #define WI_PORT5 5 95 96 /* Default port: 0 (only 0 exists on stations) */ 97 #define WI_DEFAULT_PORT (WI_PORT0 << 8) 98 99 /* Default TX rate: 2Mbps, auto fallback */ 100 #define WI_DEFAULT_TX_RATE 3 101 102 /* Default network name: ANY */ 103 #define WI_DEFAULT_NETNAME "ANY" 104 105 #define WI_DEFAULT_AP_DENSITY 1 106 107 #define WI_DEFAULT_RTS_THRESH 2347 108 109 #define WI_DEFAULT_DATALEN 2304 110 111 #define WI_DEFAULT_CREATE_IBSS 0 112 113 #define WI_DEFAULT_PM_ENABLED 0 114 115 #define WI_DEFAULT_MAX_SLEEP 100 116 117 #define WI_DEFAULT_NODENAME "FreeBSD WaveLAN/IEEE node" 118 119 #define WI_DEFAULT_IBSS "FreeBSD IBSS" 120 121 #define WI_DEFAULT_CHAN 3 122 123 /* 124 * register space access macros 125 */ 126 #define CSR_WRITE_4(sc, reg, val) \ 127 bus_space_write_4(sc->wi_btag, sc->wi_bhandle, reg, val) 128 #define CSR_WRITE_2(sc, reg, val) \ 129 bus_space_write_2(sc->wi_btag, sc->wi_bhandle, reg, val) 130 #define CSR_WRITE_1(sc, reg, val) \ 131 bus_space_write_1(sc->wi_btag, sc->wi_bhandle, reg, val) 132 133 #define CSR_READ_4(sc, reg) \ 134 bus_space_read_4(sc->wi_btag, sc->wi_bhandle, reg) 135 #define CSR_READ_2(sc, reg) \ 136 bus_space_read_2(sc->wi_btag, sc->wi_bhandle, reg) 137 #define CSR_READ_1(sc, reg) \ 138 bus_space_read_1(sc->wi_btag, sc->wi_bhandle, reg) 139 140 /* 141 * The WaveLAN/IEEE cards contain an 802.11 MAC controller which Lucent 142 * calls 'Hermes.' In typical fashion, getting documentation about this 143 * controller is about as easy as squeezing blood from a stone. Here 144 * is more or less what I know: 145 * 146 * - The Hermes controller is firmware driven, and the host interacts 147 * with the Hermes via a firmware interface, which can change. 148 * 149 * - The Hermes is described in a document called: "Hermes Firmware 150 * WaveLAN/IEEE Station Functions," document #010245, which of course 151 * Lucent will not release without an NDA. 152 * 153 * - Lucent has created a library called HCF (Hardware Control Functions) 154 * though which it wants developers to interact with the card. The HCF 155 * is needlessly complex, ill conceived and badly documented. Actually, 156 * the comments in the HCP code itself aren't bad, but the publically 157 * available manual that comes with it is awful, probably due largely to 158 * the fact that it has been emasculated in order to hide information 159 * that Lucent wants to keep proprietary. The purpose of the HCF seems 160 * to be to insulate the driver programmer from the Hermes itself so that 161 * Lucent has an excuse not to release programming in for it. 162 * 163 * - Lucent only makes available documentation and code for 'HCF Light' 164 * which is a stripped down version of HCF with certain features not 165 * implemented, most notably support for 802.11 frames. 166 * 167 * - The HCF code which I have seen blows goats. Whoever decided to 168 * use a 132 column format should be shot. 169 * 170 * Rather than actually use the Lucent HCF library, I have stripped all 171 * the useful information from it and used it to create a driver in the 172 * usual BSD form. Note: I don't want to hear anybody whining about the 173 * fact that the Lucent code is GPLed and mine isn't. I did not actually 174 * put any of Lucent's code in this driver: I only used it as a reference 175 * to obtain information about the underlying hardware. The Hermes 176 * programming interface is not GPLed, so bite me. 177 */ 178 179 /* 180 * Size of Hermes I/O space. 181 */ 182 #define WI_IOSIZ 0x40 183 184 /* 185 * Hermes register definitions and what little I know about them. 186 */ 187 188 /* Hermes command/status registers. */ 189 #define WI_COMMAND 0x00 190 #define WI_PARAM0 0x02 191 #define WI_PARAM1 0x04 192 #define WI_PARAM2 0x06 193 #define WI_STATUS 0x08 194 #define WI_RESP0 0x0A 195 #define WI_RESP1 0x0C 196 #define WI_RESP2 0x0E 197 198 /* Command register values. */ 199 #define WI_CMD_BUSY 0x8000 /* busy bit */ 200 #define WI_CMD_INI 0x0000 /* initialize */ 201 #define WI_CMD_ENABLE 0x0001 /* enable */ 202 #define WI_CMD_DISABLE 0x0002 /* disable */ 203 #define WI_CMD_DIAG 0x0003 204 #define WI_CMD_ALLOC_MEM 0x000A /* allocate NIC memory */ 205 #define WI_CMD_TX 0x000B /* transmit */ 206 #define WI_CMD_NOTIFY 0x0010 207 #define WI_CMD_INQUIRE 0x0011 208 #define WI_CMD_ACCESS 0x0021 209 #define WI_CMD_PROGRAM 0x0022 210 211 #define WI_CMD_CODE_MASK 0x003F 212 213 /* 214 * Reclaim qualifier bit, applicable to the 215 * TX and INQUIRE commands. 216 */ 217 #define WI_RECLAIM 0x0100 /* reclaim NIC memory */ 218 219 /* 220 * ACCESS command qualifier bits. 221 */ 222 #define WI_ACCESS_READ 0x0000 223 #define WI_ACCESS_WRITE 0x0100 224 225 /* 226 * PROGRAM command qualifier bits. 227 */ 228 #define WI_PROGRAM_DISABLE 0x0000 229 #define WI_PROGRAM_ENABLE_RAM 0x0100 230 #define WI_PROGRAM_ENABLE_NVRAM 0x0200 231 #define WI_PROGRAM_NVRAM 0x0300 232 233 /* Status register values */ 234 #define WI_STAT_CMD_CODE 0x003F 235 #define WI_STAT_DIAG_ERR 0x0100 236 #define WI_STAT_INQ_ERR 0x0500 237 #define WI_STAT_CMD_RESULT 0x7F00 238 239 /* memory handle management registers */ 240 #define WI_INFO_FID 0x10 241 #define WI_RX_FID 0x20 242 #define WI_ALLOC_FID 0x22 243 #define WI_TX_CMP_FID 0x24 244 245 /* 246 * Buffer Access Path (BAP) registers. 247 * These are I/O channels. I believe you can use each one for 248 * any desired purpose independently of the other. In general 249 * though, we use BAP1 for reading and writing LTV records and 250 * reading received data frames, and BAP0 for writing transmit 251 * frames. This is a convention though, not a rule. 252 */ 253 #define WI_SEL0 0x18 254 #define WI_SEL1 0x1A 255 #define WI_OFF0 0x1C 256 #define WI_OFF1 0x1E 257 #define WI_DATA0 0x36 258 #define WI_DATA1 0x38 259 #define WI_BAP0 WI_DATA0 260 #define WI_BAP1 WI_DATA1 261 262 #define WI_OFF_BUSY 0x8000 263 #define WI_OFF_ERR 0x4000 264 #define WI_OFF_DATAOFF 0x0FFF 265 266 /* Event registers */ 267 #define WI_EVENT_STAT 0x30 /* Event status */ 268 #define WI_INT_EN 0x32 /* Interrupt enable/disable */ 269 #define WI_EVENT_ACK 0x34 /* Ack event */ 270 271 /* Events */ 272 #define WI_EV_TICK 0x8000 /* aux timer tick */ 273 #define WI_EV_RES 0x4000 /* controller h/w error (time out) */ 274 #define WI_EV_INFO_DROP 0x2000 /* no RAM to build unsolicited frame */ 275 #define WI_EV_NO_CARD 0x0800 /* card removed (hunh?) */ 276 #define WI_EV_DUIF_RX 0x0400 /* wavelan management packet received */ 277 #define WI_EV_INFO 0x0080 /* async info frame */ 278 #define WI_EV_CMD 0x0010 /* command completed */ 279 #define WI_EV_ALLOC 0x0008 /* async alloc/reclaim completed */ 280 #define WI_EV_TX_EXC 0x0004 /* async xmit completed with failure */ 281 #define WI_EV_TX 0x0002 /* async xmit completed succesfully */ 282 #define WI_EV_RX 0x0001 /* async rx completed */ 283 284 #define WI_INTRS \ 285 (WI_EV_RX|WI_EV_TX|WI_EV_TX_EXC|WI_EV_ALLOC|WI_EV_INFO|WI_EV_INFO_DROP) 286 287 /* Host software registers */ 288 #define WI_SW0 0x28 289 #define WI_SW1 0x2A 290 #define WI_SW2 0x2C 291 #define WI_SW3 0x2E 292 293 #define WI_CNTL 0x14 294 295 #define WI_CNTL_AUX_ENA 0xC000 296 #define WI_CNTL_AUX_ENA_STAT 0xC000 297 #define WI_CNTL_AUX_DIS_STAT 0x0000 298 #define WI_CNTL_AUX_ENA_CNTL 0x8000 299 #define WI_CNTL_AUX_DIS_CNTL 0x4000 300 301 #define WI_AUX_PAGE 0x3A 302 #define WI_AUX_OFFSET 0x3C 303 #define WI_AUX_DATA 0x3E 304 305 /* 306 * One form of communication with the Hermes is with what Lucent calls 307 * LTV records, where LTV stands for Length, Type and Value. The length 308 * and type are 16 bits and are in native byte order. The value is in 309 * multiples of 16 bits and is in little endian byte order. 310 */ 311 struct wi_ltv_gen { 312 u_int16_t wi_len; 313 u_int16_t wi_type; 314 u_int16_t wi_val; 315 }; 316 317 struct wi_ltv_str { 318 u_int16_t wi_len; 319 u_int16_t wi_type; 320 u_int16_t wi_str[17]; 321 }; 322 323 #define WI_SETVAL(recno, val) \ 324 do { \ 325 struct wi_ltv_gen g; \ 326 \ 327 g.wi_len = 2; \ 328 g.wi_type = recno; \ 329 g.wi_val = val; \ 330 wi_write_record(sc, &g); \ 331 } while (0) 332 333 #define WI_SETSTR(recno, str) \ 334 do { \ 335 struct wi_ltv_str s; \ 336 int l; \ 337 \ 338 l = (strlen(str) + 1) & ~0x1; \ 339 bzero((char *)&s, sizeof(s)); \ 340 s.wi_len = (l / 2) + 2; \ 341 s.wi_type = recno; \ 342 s.wi_str[0] = strlen(str); \ 343 bcopy(str, (char *)&s.wi_str[1], strlen(str)); \ 344 wi_write_record(sc, (struct wi_ltv_gen *)&s); \ 345 } while (0) 346 347 /* 348 * Download buffer location and length (0xFD01). 349 */ 350 #define WI_RID_DNLD_BUF 0xFD01 351 struct wi_ltv_dnld_buf { 352 u_int16_t wi_len; 353 u_int16_t wi_type; 354 u_int16_t wi_buf_pg; /* page addr of intermediate dl buf*/ 355 u_int16_t wi_buf_off; /* offset of idb */ 356 u_int16_t wi_buf_len; /* len of idb */ 357 }; 358 359 /* 360 * Mem sizes (0xFD02). 361 */ 362 #define WI_RID_MEMSZ 0xFD02 363 struct wi_ltv_memsz { 364 u_int16_t wi_len; 365 u_int16_t wi_type; 366 u_int16_t wi_mem_ram; 367 u_int16_t wi_mem_nvram; 368 }; 369 370 /* 371 * List of intended regulatory domains (0xFD11). 372 */ 373 #define WI_RID_DOMAINS 0xFD11 374 struct wi_ltv_domains { 375 u_int16_t wi_len; 376 u_int16_t wi_type; 377 u_int16_t wi_domains[6]; 378 }; 379 380 /* 381 * CIS struct (0xFD13). 382 */ 383 #define WI_RID_CIS 0xFD13 384 struct wi_ltv_cis { 385 u_int16_t wi_len; 386 u_int16_t wi_type; 387 u_int16_t wi_cis[240]; 388 }; 389 390 /* 391 * Communications quality (0xFD43). 392 */ 393 #define WI_RID_COMMQUAL 0xFD43 394 struct wi_ltv_commqual { 395 u_int16_t wi_len; 396 u_int16_t wi_type; 397 u_int16_t wi_coms_qual; 398 u_int16_t wi_sig_lvl; 399 u_int16_t wi_noise_lvl; 400 }; 401 402 /* 403 * Actual system scale thresholds (0xFD46). 404 */ 405 #define WI_RID_SYSTEM_SCALE 0xFC06 406 #define WI_RID_SCALETHRESH 0xFD46 407 struct wi_ltv_scalethresh { 408 u_int16_t wi_len; 409 u_int16_t wi_type; 410 u_int16_t wi_energy_detect; 411 u_int16_t wi_carrier_detect; 412 u_int16_t wi_defer; 413 u_int16_t wi_cell_search; 414 u_int16_t wi_out_of_range; 415 u_int16_t wi_delta_snr; 416 }; 417 418 /* 419 * PCF info struct (0xFD87). 420 */ 421 #define WI_RID_PCF 0xFD87 422 struct wi_ltv_pcf { 423 u_int16_t wi_len; 424 u_int16_t wi_type; 425 u_int16_t wi_energy_detect; 426 u_int16_t wi_carrier_detect; 427 u_int16_t wi_defer; 428 u_int16_t wi_cell_search; 429 u_int16_t wi_range; 430 }; 431 432 /* 433 * Connection control characteristics. 434 * 1 == Basic Service Set (BSS) 435 * 2 == Wireless Distribudion System (WDS) 436 * 3 == Pseudo IBSS 437 */ 438 #define WI_RID_PORTTYPE 0xFC00 439 #define WI_PORTTYPE_BSS 0x1 440 #define WI_PORTTYPE_WDS 0x2 441 #define WI_PORTTYPE_ADHOC 0x3 442 443 /* 444 * Mac addresses. 445 */ 446 #define WI_RID_MAC_NODE 0xFC01 447 #define WI_RID_MAC_WDS 0xFC08 448 struct wi_ltv_macaddr { 449 u_int16_t wi_len; 450 u_int16_t wi_type; 451 u_int16_t wi_mac_addr[3]; 452 }; 453 454 /* 455 * Station set identification (SSID). 456 */ 457 #define WI_RID_DESIRED_SSID 0xFC02 458 #define WI_RID_OWN_SSID 0xFC04 459 struct wi_ltv_ssid { 460 u_int16_t wi_len; 461 u_int16_t wi_type; 462 u_int16_t wi_id[17]; 463 }; 464 465 /* 466 * Set communications channel (radio frequency). 467 */ 468 #define WI_RID_OWN_CHNL 0xFC03 469 470 /* 471 * Frame data size. 472 */ 473 #define WI_RID_MAX_DATALEN 0xFC07 474 475 /* 476 * ESS power management enable 477 */ 478 #define WI_RID_PM_ENABLED 0xFC09 479 480 /* 481 * ESS max PM sleep internal 482 */ 483 #define WI_RID_MAX_SLEEP 0xFC0C 484 485 /* 486 * Set our station name. 487 */ 488 #define WI_RID_NODENAME 0xFC0E 489 struct wi_ltv_nodename { 490 u_int16_t wi_len; 491 u_int16_t wi_type; 492 u_int16_t wi_nodename[17]; 493 }; 494 495 /* 496 * Multicast addresses to be put in filter. We're 497 * allowed up to 16 addresses in the filter. 498 */ 499 #define WI_RID_MCAST 0xFC80 500 struct wi_ltv_mcast { 501 u_int16_t wi_len; 502 u_int16_t wi_type; 503 struct ether_addr wi_mcast[16]; 504 }; 505 506 /* 507 * Create IBSS. 508 */ 509 #define WI_RID_CREATE_IBSS 0xFC81 510 511 #define WI_RID_FRAG_THRESH 0xFC82 512 #define WI_RID_RTS_THRESH 0xFC83 513 514 /* 515 * TX rate control 516 * 0 == Fixed 1mbps 517 * 1 == Fixed 2mbps 518 * 2 == auto fallback 519 */ 520 #define WI_RID_TX_RATE 0xFC84 521 522 /* 523 * promiscuous mode. 524 */ 525 #define WI_RID_PROMISC 0xFC85 526 527 /* 528 * Auxiliary Timer tick interval 529 */ 530 #define WI_RID_TICK_TIME 0xFCE0 531 532 /* 533 * Information frame types. 534 */ 535 #define WI_INFO_NOTIFY 0xF000 /* Handover address */ 536 #define WI_INFO_COUNTERS 0xF100 /* Statistics counters */ 537 #define WI_INFO_SCAN_RESULTS 0xF101 /* Scan results */ 538 #define WI_INFO_LINK_STAT 0xF200 /* Link status */ 539 #define WI_INFO_ASSOC_STAT 0xF201 /* Association status */ 540 541 /* 542 * Hermes transmit/receive frame structure 543 */ 544 struct wi_frame { 545 u_int16_t wi_status; /* 0x00 */ 546 u_int16_t wi_rsvd0; /* 0x02 */ 547 u_int16_t wi_rsvd1; /* 0x04 */ 548 u_int16_t wi_q_info; /* 0x06 */ 549 u_int16_t wi_rsvd2; /* 0x08 */ 550 u_int16_t wi_rsvd3; /* 0x0A */ 551 u_int16_t wi_tx_ctl; /* 0x0C */ 552 u_int16_t wi_frame_ctl; /* 0x0E */ 553 u_int16_t wi_id; /* 0x10 */ 554 u_int8_t wi_addr1[6]; /* 0x12 */ 555 u_int8_t wi_addr2[6]; /* 0x18 */ 556 u_int8_t wi_addr3[6]; /* 0x1E */ 557 u_int16_t wi_seq_ctl; /* 0x24 */ 558 u_int8_t wi_addr4[6]; /* 0x26 */ 559 u_int16_t wi_dat_len; /* 0x2C */ 560 u_int8_t wi_dst_addr[6]; /* 0x2E */ 561 u_int8_t wi_src_addr[6]; /* 0x34 */ 562 u_int16_t wi_len; /* 0x3A */ 563 u_int16_t wi_dat[3]; /* 0x3C */ /* SNAP header */ 564 u_int16_t wi_type; /* 0x42 */ 565 }; 566 567 #define WI_802_3_OFFSET 0x2E 568 #define WI_802_11_OFFSET 0x44 569 #define WI_802_11_OFFSET_RAW 0x3C 570 571 #define WI_STAT_BADCRC 0x0001 572 #define WI_STAT_UNDECRYPTABLE 0x0002 573 #define WI_STAT_ERRSTAT 0x0003 574 #define WI_STAT_MAC_PORT 0x0700 575 #define WI_STAT_1042 0x2000 /* RFC1042 encoded */ 576 #define WI_STAT_TUNNEL 0x4000 /* Bridge-tunnel encoded */ 577 #define WI_STAT_WMP_MSG 0x6000 /* WaveLAN-II management protocol */ 578 #define WI_RXSTAT_MSG_TYPE 0xE000 579 580 #define WI_ENC_TX_802_3 0x00 581 #define WI_ENC_TX_802_11 0x11 582 #define WI_ENC_TX_E_II 0x0E 583 584 #define WI_ENC_TX_1042 0x00 585 #define WI_ENC_TX_TUNNEL 0xF8 586 587 #define WI_TXCNTL_MACPORT 0x00FF 588 #define WI_TXCNTL_STRUCTTYPE 0xFF00 589 590 /* 591 * SNAP (sub-network access protocol) constants for transmission 592 * of IP datagrams over IEEE 802 networks, taken from RFC1042. 593 * We need these for the LLC/SNAP header fields in the TX/RX frame 594 * structure. 595 */ 596 #define WI_SNAP_K1 0xaa /* assigned global SAP for SNAP */ 597 #define WI_SNAP_K2 0x00 598 #define WI_SNAP_CONTROL 0x03 /* unnumbered information format */ 599 #define WI_SNAP_WORD0 (WI_SNAP_K1 | (WI_SNAP_K1 << 8)) 600 #define WI_SNAP_WORD1 (WI_SNAP_K2 | (WI_SNAP_CONTROL << 8)) 601 #define WI_SNAPHDR_LEN 0x6
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