1 /* 2 * Copyright (c) 2001 3 * Fortress Technologies, Inc. All rights reserved. 4 * Charlie Lenahan (clenahan (at) fortresstech.com) 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that: (1) source code distributions 8 * retain the above copyright notice and this paragraph in its entirety, (2) 9 * distributions including binary code include the above copyright notice and 10 * this paragraph in its entirety in the documentation or other materials 11 * provided with the distribution, and (3) all advertising materials mentioning 12 * features or use of this software display the following acknowledgement: 13 * ``This product includes software developed by the University of California, 14 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 15 * the University nor the names of its contributors may be used to endorse 16 * or promote products derived from this software without specific prior 17 * written permission. 18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 19 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 20 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 21 */ 22 23 #define NETDISSECT_REWORKED 24 #ifdef HAVE_CONFIG_H 25 #include "config.h" 26 #endif 27 28 #include <tcpdump-stdinc.h> 29 30 #include <string.h> 31 32 #include "interface.h" 33 #include "addrtoname.h" 34 35 #include "extract.h" 36 37 #include "cpack.h" 38 39 40 /* Lengths of 802.11 header components. */ 41 #define IEEE802_11_FC_LEN 2 42 #define IEEE802_11_DUR_LEN 2 43 #define IEEE802_11_DA_LEN 6 44 #define IEEE802_11_SA_LEN 6 45 #define IEEE802_11_BSSID_LEN 6 46 #define IEEE802_11_RA_LEN 6 47 #define IEEE802_11_TA_LEN 6 48 #define IEEE802_11_SEQ_LEN 2 49 #define IEEE802_11_CTL_LEN 2 50 #define IEEE802_11_IV_LEN 3 51 #define IEEE802_11_KID_LEN 1 52 53 /* Frame check sequence length. */ 54 #define IEEE802_11_FCS_LEN 4 55 56 /* Lengths of beacon components. */ 57 #define IEEE802_11_TSTAMP_LEN 8 58 #define IEEE802_11_BCNINT_LEN 2 59 #define IEEE802_11_CAPINFO_LEN 2 60 #define IEEE802_11_LISTENINT_LEN 2 61 62 #define IEEE802_11_AID_LEN 2 63 #define IEEE802_11_STATUS_LEN 2 64 #define IEEE802_11_REASON_LEN 2 65 66 /* Length of previous AP in reassocation frame */ 67 #define IEEE802_11_AP_LEN 6 68 69 #define T_MGMT 0x0 /* management */ 70 #define T_CTRL 0x1 /* control */ 71 #define T_DATA 0x2 /* data */ 72 #define T_RESV 0x3 /* reserved */ 73 74 #define ST_ASSOC_REQUEST 0x0 75 #define ST_ASSOC_RESPONSE 0x1 76 #define ST_REASSOC_REQUEST 0x2 77 #define ST_REASSOC_RESPONSE 0x3 78 #define ST_PROBE_REQUEST 0x4 79 #define ST_PROBE_RESPONSE 0x5 80 /* RESERVED 0x6 */ 81 /* RESERVED 0x7 */ 82 #define ST_BEACON 0x8 83 #define ST_ATIM 0x9 84 #define ST_DISASSOC 0xA 85 #define ST_AUTH 0xB 86 #define ST_DEAUTH 0xC 87 #define ST_ACTION 0xD 88 /* RESERVED 0xE */ 89 /* RESERVED 0xF */ 90 91 static const struct tok st_str[] = { 92 { ST_ASSOC_REQUEST, "Assoc Request" }, 93 { ST_ASSOC_RESPONSE, "Assoc Response" }, 94 { ST_REASSOC_REQUEST, "ReAssoc Request" }, 95 { ST_REASSOC_RESPONSE, "ReAssoc Response" }, 96 { ST_PROBE_REQUEST, "Probe Request" }, 97 { ST_PROBE_RESPONSE, "Probe Response" }, 98 { ST_BEACON, "Beacon" }, 99 { ST_ATIM, "ATIM" }, 100 { ST_DISASSOC, "Disassociation" }, 101 { ST_AUTH, "Authentication" }, 102 { ST_DEAUTH, "DeAuthentication" }, 103 { ST_ACTION, "Action" }, 104 { 0, NULL } 105 }; 106 107 #define CTRL_CONTROL_WRAPPER 0x7 108 #define CTRL_BAR 0x8 109 #define CTRL_BA 0x9 110 #define CTRL_PS_POLL 0xA 111 #define CTRL_RTS 0xB 112 #define CTRL_CTS 0xC 113 #define CTRL_ACK 0xD 114 #define CTRL_CF_END 0xE 115 #define CTRL_END_ACK 0xF 116 117 static const struct tok ctrl_str[] = { 118 { CTRL_CONTROL_WRAPPER, "Control Wrapper" }, 119 { CTRL_BAR, "BAR" }, 120 { CTRL_BA, "BA" }, 121 { CTRL_PS_POLL, "Power Save-Poll" }, 122 { CTRL_RTS, "Request-To-Send" }, 123 { CTRL_CTS, "Clear-To-Send" }, 124 { CTRL_ACK, "Acknowledgment" }, 125 { CTRL_CF_END, "CF-End" }, 126 { CTRL_END_ACK, "CF-End+CF-Ack" }, 127 { 0, NULL } 128 }; 129 130 #define DATA_DATA 0x0 131 #define DATA_DATA_CF_ACK 0x1 132 #define DATA_DATA_CF_POLL 0x2 133 #define DATA_DATA_CF_ACK_POLL 0x3 134 #define DATA_NODATA 0x4 135 #define DATA_NODATA_CF_ACK 0x5 136 #define DATA_NODATA_CF_POLL 0x6 137 #define DATA_NODATA_CF_ACK_POLL 0x7 138 139 #define DATA_QOS_DATA 0x8 140 #define DATA_QOS_DATA_CF_ACK 0x9 141 #define DATA_QOS_DATA_CF_POLL 0xA 142 #define DATA_QOS_DATA_CF_ACK_POLL 0xB 143 #define DATA_QOS_NODATA 0xC 144 #define DATA_QOS_CF_POLL_NODATA 0xE 145 #define DATA_QOS_CF_ACK_POLL_NODATA 0xF 146 147 /* 148 * The subtype field of a data frame is, in effect, composed of 4 flag 149 * bits - CF-Ack, CF-Poll, Null (means the frame doesn't actually have 150 * any data), and QoS. 151 */ 152 #define DATA_FRAME_IS_CF_ACK(x) ((x) & 0x01) 153 #define DATA_FRAME_IS_CF_POLL(x) ((x) & 0x02) 154 #define DATA_FRAME_IS_NULL(x) ((x) & 0x04) 155 #define DATA_FRAME_IS_QOS(x) ((x) & 0x08) 156 157 /* 158 * Bits in the frame control field. 159 */ 160 #define FC_VERSION(fc) ((fc) & 0x3) 161 #define FC_TYPE(fc) (((fc) >> 2) & 0x3) 162 #define FC_SUBTYPE(fc) (((fc) >> 4) & 0xF) 163 #define FC_TO_DS(fc) ((fc) & 0x0100) 164 #define FC_FROM_DS(fc) ((fc) & 0x0200) 165 #define FC_MORE_FLAG(fc) ((fc) & 0x0400) 166 #define FC_RETRY(fc) ((fc) & 0x0800) 167 #define FC_POWER_MGMT(fc) ((fc) & 0x1000) 168 #define FC_MORE_DATA(fc) ((fc) & 0x2000) 169 #define FC_WEP(fc) ((fc) & 0x4000) 170 #define FC_ORDER(fc) ((fc) & 0x8000) 171 172 struct mgmt_header_t { 173 uint16_t fc; 174 uint16_t duration; 175 uint8_t da[6]; 176 uint8_t sa[6]; 177 uint8_t bssid[6]; 178 uint16_t seq_ctrl; 179 }; 180 181 #define MGMT_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\ 182 IEEE802_11_DA_LEN+IEEE802_11_SA_LEN+\ 183 IEEE802_11_BSSID_LEN+IEEE802_11_SEQ_LEN) 184 185 #define CAPABILITY_ESS(cap) ((cap) & 0x0001) 186 #define CAPABILITY_IBSS(cap) ((cap) & 0x0002) 187 #define CAPABILITY_CFP(cap) ((cap) & 0x0004) 188 #define CAPABILITY_CFP_REQ(cap) ((cap) & 0x0008) 189 #define CAPABILITY_PRIVACY(cap) ((cap) & 0x0010) 190 191 struct ssid_t { 192 uint8_t element_id; 193 uint8_t length; 194 u_char ssid[33]; /* 32 + 1 for null */ 195 }; 196 197 struct rates_t { 198 uint8_t element_id; 199 uint8_t length; 200 uint8_t rate[16]; 201 }; 202 203 struct challenge_t { 204 uint8_t element_id; 205 uint8_t length; 206 uint8_t text[254]; /* 1-253 + 1 for null */ 207 }; 208 209 struct fh_t { 210 uint8_t element_id; 211 uint8_t length; 212 uint16_t dwell_time; 213 uint8_t hop_set; 214 uint8_t hop_pattern; 215 uint8_t hop_index; 216 }; 217 218 struct ds_t { 219 uint8_t element_id; 220 uint8_t length; 221 uint8_t channel; 222 }; 223 224 struct cf_t { 225 uint8_t element_id; 226 uint8_t length; 227 uint8_t count; 228 uint8_t period; 229 uint16_t max_duration; 230 uint16_t dur_remaing; 231 }; 232 233 struct tim_t { 234 uint8_t element_id; 235 uint8_t length; 236 uint8_t count; 237 uint8_t period; 238 uint8_t bitmap_control; 239 uint8_t bitmap[251]; 240 }; 241 242 #define E_SSID 0 243 #define E_RATES 1 244 #define E_FH 2 245 #define E_DS 3 246 #define E_CF 4 247 #define E_TIM 5 248 #define E_IBSS 6 249 /* reserved 7 */ 250 /* reserved 8 */ 251 /* reserved 9 */ 252 /* reserved 10 */ 253 /* reserved 11 */ 254 /* reserved 12 */ 255 /* reserved 13 */ 256 /* reserved 14 */ 257 /* reserved 15 */ 258 /* reserved 16 */ 259 260 #define E_CHALLENGE 16 261 /* reserved 17 */ 262 /* reserved 18 */ 263 /* reserved 19 */ 264 /* reserved 16 */ 265 /* reserved 16 */ 266 267 268 struct mgmt_body_t { 269 uint8_t timestamp[IEEE802_11_TSTAMP_LEN]; 270 uint16_t beacon_interval; 271 uint16_t listen_interval; 272 uint16_t status_code; 273 uint16_t aid; 274 u_char ap[IEEE802_11_AP_LEN]; 275 uint16_t reason_code; 276 uint16_t auth_alg; 277 uint16_t auth_trans_seq_num; 278 int challenge_present; 279 struct challenge_t challenge; 280 uint16_t capability_info; 281 int ssid_present; 282 struct ssid_t ssid; 283 int rates_present; 284 struct rates_t rates; 285 int ds_present; 286 struct ds_t ds; 287 int cf_present; 288 struct cf_t cf; 289 int fh_present; 290 struct fh_t fh; 291 int tim_present; 292 struct tim_t tim; 293 }; 294 295 struct ctrl_rts_t { 296 uint16_t fc; 297 uint16_t duration; 298 uint8_t ra[6]; 299 uint8_t ta[6]; 300 uint8_t fcs[4]; 301 }; 302 303 #define CTRL_RTS_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\ 304 IEEE802_11_RA_LEN+IEEE802_11_TA_LEN) 305 306 struct ctrl_cts_t { 307 uint16_t fc; 308 uint16_t duration; 309 uint8_t ra[6]; 310 uint8_t fcs[4]; 311 }; 312 313 #define CTRL_CTS_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+IEEE802_11_RA_LEN) 314 315 struct ctrl_ack_t { 316 uint16_t fc; 317 uint16_t duration; 318 uint8_t ra[6]; 319 uint8_t fcs[4]; 320 }; 321 322 #define CTRL_ACK_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+IEEE802_11_RA_LEN) 323 324 struct ctrl_ps_poll_t { 325 uint16_t fc; 326 uint16_t aid; 327 uint8_t bssid[6]; 328 uint8_t ta[6]; 329 uint8_t fcs[4]; 330 }; 331 332 #define CTRL_PS_POLL_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_AID_LEN+\ 333 IEEE802_11_BSSID_LEN+IEEE802_11_TA_LEN) 334 335 struct ctrl_end_t { 336 uint16_t fc; 337 uint16_t duration; 338 uint8_t ra[6]; 339 uint8_t bssid[6]; 340 uint8_t fcs[4]; 341 }; 342 343 #define CTRL_END_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\ 344 IEEE802_11_RA_LEN+IEEE802_11_BSSID_LEN) 345 346 struct ctrl_end_ack_t { 347 uint16_t fc; 348 uint16_t duration; 349 uint8_t ra[6]; 350 uint8_t bssid[6]; 351 uint8_t fcs[4]; 352 }; 353 354 #define CTRL_END_ACK_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\ 355 IEEE802_11_RA_LEN+IEEE802_11_BSSID_LEN) 356 357 struct ctrl_ba_t { 358 uint16_t fc; 359 uint16_t duration; 360 uint8_t ra[6]; 361 uint8_t fcs[4]; 362 }; 363 364 #define CTRL_BA_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+IEEE802_11_RA_LEN) 365 366 struct ctrl_bar_t { 367 uint16_t fc; 368 uint16_t dur; 369 uint8_t ra[6]; 370 uint8_t ta[6]; 371 uint16_t ctl; 372 uint16_t seq; 373 uint8_t fcs[4]; 374 }; 375 376 #define CTRL_BAR_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\ 377 IEEE802_11_RA_LEN+IEEE802_11_TA_LEN+\ 378 IEEE802_11_CTL_LEN+IEEE802_11_SEQ_LEN) 379 380 struct meshcntl_t { 381 uint8_t flags; 382 uint8_t ttl; 383 uint8_t seq[4]; 384 uint8_t addr4[6]; 385 uint8_t addr5[6]; 386 uint8_t addr6[6]; 387 }; 388 389 #define IV_IV(iv) ((iv) & 0xFFFFFF) 390 #define IV_PAD(iv) (((iv) >> 24) & 0x3F) 391 #define IV_KEYID(iv) (((iv) >> 30) & 0x03) 392 393 /* $FreeBSD: src/sys/net80211/ieee80211_radiotap.h,v 1.5 2005/01/22 20:12:05 sam Exp $ */ 394 /* NetBSD: ieee802_11_radio.h,v 1.2 2006/02/26 03:04:03 dyoung Exp */ 395 396 /*- 397 * Copyright (c) 2003, 2004 David Young. All rights reserved. 398 * 399 * Redistribution and use in source and binary forms, with or without 400 * modification, are permitted provided that the following conditions 401 * are met: 402 * 1. Redistributions of source code must retain the above copyright 403 * notice, this list of conditions and the following disclaimer. 404 * 2. Redistributions in binary form must reproduce the above copyright 405 * notice, this list of conditions and the following disclaimer in the 406 * documentation and/or other materials provided with the distribution. 407 * 3. The name of David Young may not be used to endorse or promote 408 * products derived from this software without specific prior 409 * written permission. 410 * 411 * THIS SOFTWARE IS PROVIDED BY DAVID YOUNG ``AS IS'' AND ANY 412 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 413 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 414 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DAVID 415 * YOUNG BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 416 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 417 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 418 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 419 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 420 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 421 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 422 * OF SUCH DAMAGE. 423 */ 424 425 /* A generic radio capture format is desirable. It must be 426 * rigidly defined (e.g., units for fields should be given), 427 * and easily extensible. 428 * 429 * The following is an extensible radio capture format. It is 430 * based on a bitmap indicating which fields are present. 431 * 432 * I am trying to describe precisely what the application programmer 433 * should expect in the following, and for that reason I tell the 434 * units and origin of each measurement (where it applies), or else I 435 * use sufficiently weaselly language ("is a monotonically nondecreasing 436 * function of...") that I cannot set false expectations for lawyerly 437 * readers. 438 */ 439 440 /* 441 * The radio capture header precedes the 802.11 header. 442 * 443 * Note well: all radiotap fields are little-endian. 444 */ 445 struct ieee80211_radiotap_header { 446 uint8_t it_version; /* Version 0. Only increases 447 * for drastic changes, 448 * introduction of compatible 449 * new fields does not count. 450 */ 451 uint8_t it_pad; 452 uint16_t it_len; /* length of the whole 453 * header in bytes, including 454 * it_version, it_pad, 455 * it_len, and data fields. 456 */ 457 uint32_t it_present; /* A bitmap telling which 458 * fields are present. Set bit 31 459 * (0x80000000) to extend the 460 * bitmap by another 32 bits. 461 * Additional extensions are made 462 * by setting bit 31. 463 */ 464 }; 465 466 /* Name Data type Units 467 * ---- --------- ----- 468 * 469 * IEEE80211_RADIOTAP_TSFT uint64_t microseconds 470 * 471 * Value in microseconds of the MAC's 64-bit 802.11 Time 472 * Synchronization Function timer when the first bit of the 473 * MPDU arrived at the MAC. For received frames, only. 474 * 475 * IEEE80211_RADIOTAP_CHANNEL 2 x uint16_t MHz, bitmap 476 * 477 * Tx/Rx frequency in MHz, followed by flags (see below). 478 * Note that IEEE80211_RADIOTAP_XCHANNEL must be used to 479 * represent an HT channel as there is not enough room in 480 * the flags word. 481 * 482 * IEEE80211_RADIOTAP_FHSS uint16_t see below 483 * 484 * For frequency-hopping radios, the hop set (first byte) 485 * and pattern (second byte). 486 * 487 * IEEE80211_RADIOTAP_RATE uint8_t 500kb/s or index 488 * 489 * Tx/Rx data rate. If bit 0x80 is set then it represents an 490 * an MCS index and not an IEEE rate. 491 * 492 * IEEE80211_RADIOTAP_DBM_ANTSIGNAL int8_t decibels from 493 * one milliwatt (dBm) 494 * 495 * RF signal power at the antenna, decibel difference from 496 * one milliwatt. 497 * 498 * IEEE80211_RADIOTAP_DBM_ANTNOISE int8_t decibels from 499 * one milliwatt (dBm) 500 * 501 * RF noise power at the antenna, decibel difference from one 502 * milliwatt. 503 * 504 * IEEE80211_RADIOTAP_DB_ANTSIGNAL uint8_t decibel (dB) 505 * 506 * RF signal power at the antenna, decibel difference from an 507 * arbitrary, fixed reference. 508 * 509 * IEEE80211_RADIOTAP_DB_ANTNOISE uint8_t decibel (dB) 510 * 511 * RF noise power at the antenna, decibel difference from an 512 * arbitrary, fixed reference point. 513 * 514 * IEEE80211_RADIOTAP_LOCK_QUALITY uint16_t unitless 515 * 516 * Quality of Barker code lock. Unitless. Monotonically 517 * nondecreasing with "better" lock strength. Called "Signal 518 * Quality" in datasheets. (Is there a standard way to measure 519 * this?) 520 * 521 * IEEE80211_RADIOTAP_TX_ATTENUATION uint16_t unitless 522 * 523 * Transmit power expressed as unitless distance from max 524 * power set at factory calibration. 0 is max power. 525 * Monotonically nondecreasing with lower power levels. 526 * 527 * IEEE80211_RADIOTAP_DB_TX_ATTENUATION uint16_t decibels (dB) 528 * 529 * Transmit power expressed as decibel distance from max power 530 * set at factory calibration. 0 is max power. Monotonically 531 * nondecreasing with lower power levels. 532 * 533 * IEEE80211_RADIOTAP_DBM_TX_POWER int8_t decibels from 534 * one milliwatt (dBm) 535 * 536 * Transmit power expressed as dBm (decibels from a 1 milliwatt 537 * reference). This is the absolute power level measured at 538 * the antenna port. 539 * 540 * IEEE80211_RADIOTAP_FLAGS uint8_t bitmap 541 * 542 * Properties of transmitted and received frames. See flags 543 * defined below. 544 * 545 * IEEE80211_RADIOTAP_ANTENNA uint8_t antenna index 546 * 547 * Unitless indication of the Rx/Tx antenna for this packet. 548 * The first antenna is antenna 0. 549 * 550 * IEEE80211_RADIOTAP_RX_FLAGS uint16_t bitmap 551 * 552 * Properties of received frames. See flags defined below. 553 * 554 * IEEE80211_RADIOTAP_XCHANNEL uint32_t bitmap 555 * uint16_t MHz 556 * uint8_t channel number 557 * uint8_t .5 dBm 558 * 559 * Extended channel specification: flags (see below) followed by 560 * frequency in MHz, the corresponding IEEE channel number, and 561 * finally the maximum regulatory transmit power cap in .5 dBm 562 * units. This property supersedes IEEE80211_RADIOTAP_CHANNEL 563 * and only one of the two should be present. 564 * 565 * IEEE80211_RADIOTAP_MCS uint8_t known 566 * uint8_t flags 567 * uint8_t mcs 568 * 569 * Bitset indicating which fields have known values, followed 570 * by bitset of flag values, followed by the MCS rate index as 571 * in IEEE 802.11n. 572 * 573 * IEEE80211_RADIOTAP_VENDOR_NAMESPACE 574 * uint8_t OUI[3] 575 * uint8_t subspace 576 * uint16_t length 577 * 578 * The Vendor Namespace Field contains three sub-fields. The first 579 * sub-field is 3 bytes long. It contains the vendor's IEEE 802 580 * Organizationally Unique Identifier (OUI). The fourth byte is a 581 * vendor-specific "namespace selector." 582 * 583 */ 584 enum ieee80211_radiotap_type { 585 IEEE80211_RADIOTAP_TSFT = 0, 586 IEEE80211_RADIOTAP_FLAGS = 1, 587 IEEE80211_RADIOTAP_RATE = 2, 588 IEEE80211_RADIOTAP_CHANNEL = 3, 589 IEEE80211_RADIOTAP_FHSS = 4, 590 IEEE80211_RADIOTAP_DBM_ANTSIGNAL = 5, 591 IEEE80211_RADIOTAP_DBM_ANTNOISE = 6, 592 IEEE80211_RADIOTAP_LOCK_QUALITY = 7, 593 IEEE80211_RADIOTAP_TX_ATTENUATION = 8, 594 IEEE80211_RADIOTAP_DB_TX_ATTENUATION = 9, 595 IEEE80211_RADIOTAP_DBM_TX_POWER = 10, 596 IEEE80211_RADIOTAP_ANTENNA = 11, 597 IEEE80211_RADIOTAP_DB_ANTSIGNAL = 12, 598 IEEE80211_RADIOTAP_DB_ANTNOISE = 13, 599 IEEE80211_RADIOTAP_RX_FLAGS = 14, 600 /* NB: gap for netbsd definitions */ 601 IEEE80211_RADIOTAP_XCHANNEL = 18, 602 IEEE80211_RADIOTAP_MCS = 19, 603 IEEE80211_RADIOTAP_NAMESPACE = 29, 604 IEEE80211_RADIOTAP_VENDOR_NAMESPACE = 30, 605 IEEE80211_RADIOTAP_EXT = 31 606 }; 607 608 /* channel attributes */ 609 #define IEEE80211_CHAN_TURBO 0x00010 /* Turbo channel */ 610 #define IEEE80211_CHAN_CCK 0x00020 /* CCK channel */ 611 #define IEEE80211_CHAN_OFDM 0x00040 /* OFDM channel */ 612 #define IEEE80211_CHAN_2GHZ 0x00080 /* 2 GHz spectrum channel. */ 613 #define IEEE80211_CHAN_5GHZ 0x00100 /* 5 GHz spectrum channel */ 614 #define IEEE80211_CHAN_PASSIVE 0x00200 /* Only passive scan allowed */ 615 #define IEEE80211_CHAN_DYN 0x00400 /* Dynamic CCK-OFDM channel */ 616 #define IEEE80211_CHAN_GFSK 0x00800 /* GFSK channel (FHSS PHY) */ 617 #define IEEE80211_CHAN_GSM 0x01000 /* 900 MHz spectrum channel */ 618 #define IEEE80211_CHAN_STURBO 0x02000 /* 11a static turbo channel only */ 619 #define IEEE80211_CHAN_HALF 0x04000 /* Half rate channel */ 620 #define IEEE80211_CHAN_QUARTER 0x08000 /* Quarter rate channel */ 621 #define IEEE80211_CHAN_HT20 0x10000 /* HT 20 channel */ 622 #define IEEE80211_CHAN_HT40U 0x20000 /* HT 40 channel w/ ext above */ 623 #define IEEE80211_CHAN_HT40D 0x40000 /* HT 40 channel w/ ext below */ 624 625 /* Useful combinations of channel characteristics, borrowed from Ethereal */ 626 #define IEEE80211_CHAN_A \ 627 (IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_OFDM) 628 #define IEEE80211_CHAN_B \ 629 (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_CCK) 630 #define IEEE80211_CHAN_G \ 631 (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_DYN) 632 #define IEEE80211_CHAN_TA \ 633 (IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_OFDM | IEEE80211_CHAN_TURBO) 634 #define IEEE80211_CHAN_TG \ 635 (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_DYN | IEEE80211_CHAN_TURBO) 636 637 638 /* For IEEE80211_RADIOTAP_FLAGS */ 639 #define IEEE80211_RADIOTAP_F_CFP 0x01 /* sent/received 640 * during CFP 641 */ 642 #define IEEE80211_RADIOTAP_F_SHORTPRE 0x02 /* sent/received 643 * with short 644 * preamble 645 */ 646 #define IEEE80211_RADIOTAP_F_WEP 0x04 /* sent/received 647 * with WEP encryption 648 */ 649 #define IEEE80211_RADIOTAP_F_FRAG 0x08 /* sent/received 650 * with fragmentation 651 */ 652 #define IEEE80211_RADIOTAP_F_FCS 0x10 /* frame includes FCS */ 653 #define IEEE80211_RADIOTAP_F_DATAPAD 0x20 /* frame has padding between 654 * 802.11 header and payload 655 * (to 32-bit boundary) 656 */ 657 #define IEEE80211_RADIOTAP_F_BADFCS 0x40 /* does not pass FCS check */ 658 659 /* For IEEE80211_RADIOTAP_RX_FLAGS */ 660 #define IEEE80211_RADIOTAP_F_RX_BADFCS 0x0001 /* frame failed crc check */ 661 #define IEEE80211_RADIOTAP_F_RX_PLCP_CRC 0x0002 /* frame failed PLCP CRC check */ 662 663 /* For IEEE80211_RADIOTAP_MCS known */ 664 #define IEEE80211_RADIOTAP_MCS_BANDWIDTH_KNOWN 0x01 665 #define IEEE80211_RADIOTAP_MCS_MCS_INDEX_KNOWN 0x02 /* MCS index field */ 666 #define IEEE80211_RADIOTAP_MCS_GUARD_INTERVAL_KNOWN 0x04 667 #define IEEE80211_RADIOTAP_MCS_HT_FORMAT_KNOWN 0x08 668 #define IEEE80211_RADIOTAP_MCS_FEC_TYPE_KNOWN 0x10 669 #define IEEE80211_RADIOTAP_MCS_STBC_KNOWN 0x20 670 671 /* For IEEE80211_RADIOTAP_MCS flags */ 672 #define IEEE80211_RADIOTAP_MCS_BANDWIDTH_MASK 0x03 673 #define IEEE80211_RADIOTAP_MCS_BANDWIDTH_20 0 674 #define IEEE80211_RADIOTAP_MCS_BANDWIDTH_40 1 675 #define IEEE80211_RADIOTAP_MCS_BANDWIDTH_20L 2 676 #define IEEE80211_RADIOTAP_MCS_BANDWIDTH_20U 3 677 #define IEEE80211_RADIOTAP_MCS_SHORT_GI 0x04 /* short guard interval */ 678 #define IEEE80211_RADIOTAP_MCS_HT_GREENFIELD 0x08 679 #define IEEE80211_RADIOTAP_MCS_FEC_LDPC 0x10 680 #define IEEE80211_RADIOTAP_MCS_STBC_MASK 0x60 681 #define IEEE80211_RADIOTAP_MCS_STBC_1 1 682 #define IEEE80211_RADIOTAP_MCS_STBC_2 2 683 #define IEEE80211_RADIOTAP_MCS_STBC_3 3 684 #define IEEE80211_RADIOTAP_MCS_STBC_SHIFT 5 685 686 static const char tstr[] = "[|802.11]"; 687 688 /* Radiotap state */ 689 /* This is used to save state when parsing/processing parameters */ 690 struct radiotap_state 691 { 692 uint32_t present; 693 694 uint8_t rate; 695 }; 696 697 #define PRINT_SSID(p) \ 698 if (p.ssid_present) { \ 699 ND_PRINT((ndo, " (")); \ 700 fn_print(ndo, p.ssid.ssid, NULL); \ 701 ND_PRINT((ndo, ")")); \ 702 } 703 704 #define PRINT_RATE(_sep, _r, _suf) \ 705 ND_PRINT((ndo, "%s%2.1f%s", _sep, (.5 * ((_r) & 0x7f)), _suf)) 706 #define PRINT_RATES(p) \ 707 if (p.rates_present) { \ 708 int z; \ 709 const char *sep = " ["; \ 710 for (z = 0; z < p.rates.length ; z++) { \ 711 PRINT_RATE(sep, p.rates.rate[z], \ 712 (p.rates.rate[z] & 0x80 ? "*" : "")); \ 713 sep = " "; \ 714 } \ 715 if (p.rates.length != 0) \ 716 ND_PRINT((ndo, " Mbit]")); \ 717 } 718 719 #define PRINT_DS_CHANNEL(p) \ 720 if (p.ds_present) \ 721 ND_PRINT((ndo, " CH: %u", p.ds.channel)); \ 722 ND_PRINT((ndo, "%s", \ 723 CAPABILITY_PRIVACY(p.capability_info) ? ", PRIVACY" : "")); 724 725 #define MAX_MCS_INDEX 76 726 727 /* 728 * Indices are: 729 * 730 * the MCS index (0-76); 731 * 732 * 0 for 20 MHz, 1 for 40 MHz; 733 * 734 * 0 for a long guard interval, 1 for a short guard interval. 735 */ 736 static const float ieee80211_float_htrates[MAX_MCS_INDEX+1][2][2] = { 737 /* MCS 0 */ 738 { /* 20 Mhz */ { 6.5, /* SGI */ 7.2, }, 739 /* 40 Mhz */ { 13.5, /* SGI */ 15.0, }, 740 }, 741 742 /* MCS 1 */ 743 { /* 20 Mhz */ { 13.0, /* SGI */ 14.4, }, 744 /* 40 Mhz */ { 27.0, /* SGI */ 30.0, }, 745 }, 746 747 /* MCS 2 */ 748 { /* 20 Mhz */ { 19.5, /* SGI */ 21.7, }, 749 /* 40 Mhz */ { 40.5, /* SGI */ 45.0, }, 750 }, 751 752 /* MCS 3 */ 753 { /* 20 Mhz */ { 26.0, /* SGI */ 28.9, }, 754 /* 40 Mhz */ { 54.0, /* SGI */ 60.0, }, 755 }, 756 757 /* MCS 4 */ 758 { /* 20 Mhz */ { 39.0, /* SGI */ 43.3, }, 759 /* 40 Mhz */ { 81.0, /* SGI */ 90.0, }, 760 }, 761 762 /* MCS 5 */ 763 { /* 20 Mhz */ { 52.0, /* SGI */ 57.8, }, 764 /* 40 Mhz */ { 108.0, /* SGI */ 120.0, }, 765 }, 766 767 /* MCS 6 */ 768 { /* 20 Mhz */ { 58.5, /* SGI */ 65.0, }, 769 /* 40 Mhz */ { 121.5, /* SGI */ 135.0, }, 770 }, 771 772 /* MCS 7 */ 773 { /* 20 Mhz */ { 65.0, /* SGI */ 72.2, }, 774 /* 40 Mhz */ { 135.0, /* SGI */ 150.0, }, 775 }, 776 777 /* MCS 8 */ 778 { /* 20 Mhz */ { 13.0, /* SGI */ 14.4, }, 779 /* 40 Mhz */ { 27.0, /* SGI */ 30.0, }, 780 }, 781 782 /* MCS 9 */ 783 { /* 20 Mhz */ { 26.0, /* SGI */ 28.9, }, 784 /* 40 Mhz */ { 54.0, /* SGI */ 60.0, }, 785 }, 786 787 /* MCS 10 */ 788 { /* 20 Mhz */ { 39.0, /* SGI */ 43.3, }, 789 /* 40 Mhz */ { 81.0, /* SGI */ 90.0, }, 790 }, 791 792 /* MCS 11 */ 793 { /* 20 Mhz */ { 52.0, /* SGI */ 57.8, }, 794 /* 40 Mhz */ { 108.0, /* SGI */ 120.0, }, 795 }, 796 797 /* MCS 12 */ 798 { /* 20 Mhz */ { 78.0, /* SGI */ 86.7, }, 799 /* 40 Mhz */ { 162.0, /* SGI */ 180.0, }, 800 }, 801 802 /* MCS 13 */ 803 { /* 20 Mhz */ { 104.0, /* SGI */ 115.6, }, 804 /* 40 Mhz */ { 216.0, /* SGI */ 240.0, }, 805 }, 806 807 /* MCS 14 */ 808 { /* 20 Mhz */ { 117.0, /* SGI */ 130.0, }, 809 /* 40 Mhz */ { 243.0, /* SGI */ 270.0, }, 810 }, 811 812 /* MCS 15 */ 813 { /* 20 Mhz */ { 130.0, /* SGI */ 144.4, }, 814 /* 40 Mhz */ { 270.0, /* SGI */ 300.0, }, 815 }, 816 817 /* MCS 16 */ 818 { /* 20 Mhz */ { 19.5, /* SGI */ 21.7, }, 819 /* 40 Mhz */ { 40.5, /* SGI */ 45.0, }, 820 }, 821 822 /* MCS 17 */ 823 { /* 20 Mhz */ { 39.0, /* SGI */ 43.3, }, 824 /* 40 Mhz */ { 81.0, /* SGI */ 90.0, }, 825 }, 826 827 /* MCS 18 */ 828 { /* 20 Mhz */ { 58.5, /* SGI */ 65.0, }, 829 /* 40 Mhz */ { 121.5, /* SGI */ 135.0, }, 830 }, 831 832 /* MCS 19 */ 833 { /* 20 Mhz */ { 78.0, /* SGI */ 86.7, }, 834 /* 40 Mhz */ { 162.0, /* SGI */ 180.0, }, 835 }, 836 837 /* MCS 20 */ 838 { /* 20 Mhz */ { 117.0, /* SGI */ 130.0, }, 839 /* 40 Mhz */ { 243.0, /* SGI */ 270.0, }, 840 }, 841 842 /* MCS 21 */ 843 { /* 20 Mhz */ { 156.0, /* SGI */ 173.3, }, 844 /* 40 Mhz */ { 324.0, /* SGI */ 360.0, }, 845 }, 846 847 /* MCS 22 */ 848 { /* 20 Mhz */ { 175.5, /* SGI */ 195.0, }, 849 /* 40 Mhz */ { 364.5, /* SGI */ 405.0, }, 850 }, 851 852 /* MCS 23 */ 853 { /* 20 Mhz */ { 195.0, /* SGI */ 216.7, }, 854 /* 40 Mhz */ { 405.0, /* SGI */ 450.0, }, 855 }, 856 857 /* MCS 24 */ 858 { /* 20 Mhz */ { 26.0, /* SGI */ 28.9, }, 859 /* 40 Mhz */ { 54.0, /* SGI */ 60.0, }, 860 }, 861 862 /* MCS 25 */ 863 { /* 20 Mhz */ { 52.0, /* SGI */ 57.8, }, 864 /* 40 Mhz */ { 108.0, /* SGI */ 120.0, }, 865 }, 866 867 /* MCS 26 */ 868 { /* 20 Mhz */ { 78.0, /* SGI */ 86.7, }, 869 /* 40 Mhz */ { 162.0, /* SGI */ 180.0, }, 870 }, 871 872 /* MCS 27 */ 873 { /* 20 Mhz */ { 104.0, /* SGI */ 115.6, }, 874 /* 40 Mhz */ { 216.0, /* SGI */ 240.0, }, 875 }, 876 877 /* MCS 28 */ 878 { /* 20 Mhz */ { 156.0, /* SGI */ 173.3, }, 879 /* 40 Mhz */ { 324.0, /* SGI */ 360.0, }, 880 }, 881 882 /* MCS 29 */ 883 { /* 20 Mhz */ { 208.0, /* SGI */ 231.1, }, 884 /* 40 Mhz */ { 432.0, /* SGI */ 480.0, }, 885 }, 886 887 /* MCS 30 */ 888 { /* 20 Mhz */ { 234.0, /* SGI */ 260.0, }, 889 /* 40 Mhz */ { 486.0, /* SGI */ 540.0, }, 890 }, 891 892 /* MCS 31 */ 893 { /* 20 Mhz */ { 260.0, /* SGI */ 288.9, }, 894 /* 40 Mhz */ { 540.0, /* SGI */ 600.0, }, 895 }, 896 897 /* MCS 32 */ 898 { /* 20 Mhz */ { 0.0, /* SGI */ 0.0, }, /* not valid */ 899 /* 40 Mhz */ { 6.0, /* SGI */ 6.7, }, 900 }, 901 902 /* MCS 33 */ 903 { /* 20 Mhz */ { 39.0, /* SGI */ 43.3, }, 904 /* 40 Mhz */ { 81.0, /* SGI */ 90.0, }, 905 }, 906 907 /* MCS 34 */ 908 { /* 20 Mhz */ { 52.0, /* SGI */ 57.8, }, 909 /* 40 Mhz */ { 108.0, /* SGI */ 120.0, }, 910 }, 911 912 /* MCS 35 */ 913 { /* 20 Mhz */ { 65.0, /* SGI */ 72.2, }, 914 /* 40 Mhz */ { 135.0, /* SGI */ 150.0, }, 915 }, 916 917 /* MCS 36 */ 918 { /* 20 Mhz */ { 58.5, /* SGI */ 65.0, }, 919 /* 40 Mhz */ { 121.5, /* SGI */ 135.0, }, 920 }, 921 922 /* MCS 37 */ 923 { /* 20 Mhz */ { 78.0, /* SGI */ 86.7, }, 924 /* 40 Mhz */ { 162.0, /* SGI */ 180.0, }, 925 }, 926 927 /* MCS 38 */ 928 { /* 20 Mhz */ { 97.5, /* SGI */ 108.3, }, 929 /* 40 Mhz */ { 202.5, /* SGI */ 225.0, }, 930 }, 931 932 /* MCS 39 */ 933 { /* 20 Mhz */ { 52.0, /* SGI */ 57.8, }, 934 /* 40 Mhz */ { 108.0, /* SGI */ 120.0, }, 935 }, 936 937 /* MCS 40 */ 938 { /* 20 Mhz */ { 65.0, /* SGI */ 72.2, }, 939 /* 40 Mhz */ { 135.0, /* SGI */ 150.0, }, 940 }, 941 942 /* MCS 41 */ 943 { /* 20 Mhz */ { 65.0, /* SGI */ 72.2, }, 944 /* 40 Mhz */ { 135.0, /* SGI */ 150.0, }, 945 }, 946 947 /* MCS 42 */ 948 { /* 20 Mhz */ { 78.0, /* SGI */ 86.7, }, 949 /* 40 Mhz */ { 162.0, /* SGI */ 180.0, }, 950 }, 951 952 /* MCS 43 */ 953 { /* 20 Mhz */ { 91.0, /* SGI */ 101.1, }, 954 /* 40 Mhz */ { 189.0, /* SGI */ 210.0, }, 955 }, 956 957 /* MCS 44 */ 958 { /* 20 Mhz */ { 91.0, /* SGI */ 101.1, }, 959 /* 40 Mhz */ { 189.0, /* SGI */ 210.0, }, 960 }, 961 962 /* MCS 45 */ 963 { /* 20 Mhz */ { 104.0, /* SGI */ 115.6, }, 964 /* 40 Mhz */ { 216.0, /* SGI */ 240.0, }, 965 }, 966 967 /* MCS 46 */ 968 { /* 20 Mhz */ { 78.0, /* SGI */ 86.7, }, 969 /* 40 Mhz */ { 162.0, /* SGI */ 180.0, }, 970 }, 971 972 /* MCS 47 */ 973 { /* 20 Mhz */ { 97.5, /* SGI */ 108.3, }, 974 /* 40 Mhz */ { 202.5, /* SGI */ 225.0, }, 975 }, 976 977 /* MCS 48 */ 978 { /* 20 Mhz */ { 97.5, /* SGI */ 108.3, }, 979 /* 40 Mhz */ { 202.5, /* SGI */ 225.0, }, 980 }, 981 982 /* MCS 49 */ 983 { /* 20 Mhz */ { 117.0, /* SGI */ 130.0, }, 984 /* 40 Mhz */ { 243.0, /* SGI */ 270.0, }, 985 }, 986 987 /* MCS 50 */ 988 { /* 20 Mhz */ { 136.5, /* SGI */ 151.7, }, 989 /* 40 Mhz */ { 283.5, /* SGI */ 315.0, }, 990 }, 991 992 /* MCS 51 */ 993 { /* 20 Mhz */ { 136.5, /* SGI */ 151.7, }, 994 /* 40 Mhz */ { 283.5, /* SGI */ 315.0, }, 995 }, 996 997 /* MCS 52 */ 998 { /* 20 Mhz */ { 156.0, /* SGI */ 173.3, }, 999 /* 40 Mhz */ { 324.0, /* SGI */ 360.0, }, 1000 }, 1001 1002 /* MCS 53 */ 1003 { /* 20 Mhz */ { 65.0, /* SGI */ 72.2, }, 1004 /* 40 Mhz */ { 135.0, /* SGI */ 150.0, }, 1005 }, 1006 1007 /* MCS 54 */ 1008 { /* 20 Mhz */ { 78.0, /* SGI */ 86.7, }, 1009 /* 40 Mhz */ { 162.0, /* SGI */ 180.0, }, 1010 }, 1011 1012 /* MCS 55 */ 1013 { /* 20 Mhz */ { 91.0, /* SGI */ 101.1, }, 1014 /* 40 Mhz */ { 189.0, /* SGI */ 210.0, }, 1015 }, 1016 1017 /* MCS 56 */ 1018 { /* 20 Mhz */ { 78.0, /* SGI */ 86.7, }, 1019 /* 40 Mhz */ { 162.0, /* SGI */ 180.0, }, 1020 }, 1021 1022 /* MCS 57 */ 1023 { /* 20 Mhz */ { 91.0, /* SGI */ 101.1, }, 1024 /* 40 Mhz */ { 189.0, /* SGI */ 210.0, }, 1025 }, 1026 1027 /* MCS 58 */ 1028 { /* 20 Mhz */ { 104.0, /* SGI */ 115.6, }, 1029 /* 40 Mhz */ { 216.0, /* SGI */ 240.0, }, 1030 }, 1031 1032 /* MCS 59 */ 1033 { /* 20 Mhz */ { 117.0, /* SGI */ 130.0, }, 1034 /* 40 Mhz */ { 243.0, /* SGI */ 270.0, }, 1035 }, 1036 1037 /* MCS 60 */ 1038 { /* 20 Mhz */ { 104.0, /* SGI */ 115.6, }, 1039 /* 40 Mhz */ { 216.0, /* SGI */ 240.0, }, 1040 }, 1041 1042 /* MCS 61 */ 1043 { /* 20 Mhz */ { 117.0, /* SGI */ 130.0, }, 1044 /* 40 Mhz */ { 243.0, /* SGI */ 270.0, }, 1045 }, 1046 1047 /* MCS 62 */ 1048 { /* 20 Mhz */ { 130.0, /* SGI */ 144.4, }, 1049 /* 40 Mhz */ { 270.0, /* SGI */ 300.0, }, 1050 }, 1051 1052 /* MCS 63 */ 1053 { /* 20 Mhz */ { 130.0, /* SGI */ 144.4, }, 1054 /* 40 Mhz */ { 270.0, /* SGI */ 300.0, }, 1055 }, 1056 1057 /* MCS 64 */ 1058 { /* 20 Mhz */ { 143.0, /* SGI */ 158.9, }, 1059 /* 40 Mhz */ { 297.0, /* SGI */ 330.0, }, 1060 }, 1061 1062 /* MCS 65 */ 1063 { /* 20 Mhz */ { 97.5, /* SGI */ 108.3, }, 1064 /* 40 Mhz */ { 202.5, /* SGI */ 225.0, }, 1065 }, 1066 1067 /* MCS 66 */ 1068 { /* 20 Mhz */ { 117.0, /* SGI */ 130.0, }, 1069 /* 40 Mhz */ { 243.0, /* SGI */ 270.0, }, 1070 }, 1071 1072 /* MCS 67 */ 1073 { /* 20 Mhz */ { 136.5, /* SGI */ 151.7, }, 1074 /* 40 Mhz */ { 283.5, /* SGI */ 315.0, }, 1075 }, 1076 1077 /* MCS 68 */ 1078 { /* 20 Mhz */ { 117.0, /* SGI */ 130.0, }, 1079 /* 40 Mhz */ { 243.0, /* SGI */ 270.0, }, 1080 }, 1081 1082 /* MCS 69 */ 1083 { /* 20 Mhz */ { 136.5, /* SGI */ 151.7, }, 1084 /* 40 Mhz */ { 283.5, /* SGI */ 315.0, }, 1085 }, 1086 1087 /* MCS 70 */ 1088 { /* 20 Mhz */ { 156.0, /* SGI */ 173.3, }, 1089 /* 40 Mhz */ { 324.0, /* SGI */ 360.0, }, 1090 }, 1091 1092 /* MCS 71 */ 1093 { /* 20 Mhz */ { 175.5, /* SGI */ 195.0, }, 1094 /* 40 Mhz */ { 364.5, /* SGI */ 405.0, }, 1095 }, 1096 1097 /* MCS 72 */ 1098 { /* 20 Mhz */ { 156.0, /* SGI */ 173.3, }, 1099 /* 40 Mhz */ { 324.0, /* SGI */ 360.0, }, 1100 }, 1101 1102 /* MCS 73 */ 1103 { /* 20 Mhz */ { 175.5, /* SGI */ 195.0, }, 1104 /* 40 Mhz */ { 364.5, /* SGI */ 405.0, }, 1105 }, 1106 1107 /* MCS 74 */ 1108 { /* 20 Mhz */ { 195.0, /* SGI */ 216.7, }, 1109 /* 40 Mhz */ { 405.0, /* SGI */ 450.0, }, 1110 }, 1111 1112 /* MCS 75 */ 1113 { /* 20 Mhz */ { 195.0, /* SGI */ 216.7, }, 1114 /* 40 Mhz */ { 405.0, /* SGI */ 450.0, }, 1115 }, 1116 1117 /* MCS 76 */ 1118 { /* 20 Mhz */ { 214.5, /* SGI */ 238.3, }, 1119 /* 40 Mhz */ { 445.5, /* SGI */ 495.0, }, 1120 }, 1121 }; 1122 1123 static const char *auth_alg_text[]={"Open System","Shared Key","EAP"}; 1124 #define NUM_AUTH_ALGS (sizeof auth_alg_text / sizeof auth_alg_text[0]) 1125 1126 static const char *status_text[] = { 1127 "Successful", /* 0 */ 1128 "Unspecified failure", /* 1 */ 1129 "Reserved", /* 2 */ 1130 "Reserved", /* 3 */ 1131 "Reserved", /* 4 */ 1132 "Reserved", /* 5 */ 1133 "Reserved", /* 6 */ 1134 "Reserved", /* 7 */ 1135 "Reserved", /* 8 */ 1136 "Reserved", /* 9 */ 1137 "Cannot Support all requested capabilities in the Capability " 1138 "Information field", /* 10 */ 1139 "Reassociation denied due to inability to confirm that association " 1140 "exists", /* 11 */ 1141 "Association denied due to reason outside the scope of the " 1142 "standard", /* 12 */ 1143 "Responding station does not support the specified authentication " 1144 "algorithm ", /* 13 */ 1145 "Received an Authentication frame with authentication transaction " 1146 "sequence number out of expected sequence", /* 14 */ 1147 "Authentication rejected because of challenge failure", /* 15 */ 1148 "Authentication rejected due to timeout waiting for next frame in " 1149 "sequence", /* 16 */ 1150 "Association denied because AP is unable to handle additional" 1151 "associated stations", /* 17 */ 1152 "Association denied due to requesting station not supporting all of " 1153 "the data rates in BSSBasicRateSet parameter", /* 18 */ 1154 "Association denied due to requesting station not supporting " 1155 "short preamble operation", /* 19 */ 1156 "Association denied due to requesting station not supporting " 1157 "PBCC encoding", /* 20 */ 1158 "Association denied due to requesting station not supporting " 1159 "channel agility", /* 21 */ 1160 "Association request rejected because Spectrum Management " 1161 "capability is required", /* 22 */ 1162 "Association request rejected because the information in the " 1163 "Power Capability element is unacceptable", /* 23 */ 1164 "Association request rejected because the information in the " 1165 "Supported Channels element is unacceptable", /* 24 */ 1166 "Association denied due to requesting station not supporting " 1167 "short slot operation", /* 25 */ 1168 "Association denied due to requesting station not supporting " 1169 "DSSS-OFDM operation", /* 26 */ 1170 "Association denied because the requested STA does not support HT " 1171 "features", /* 27 */ 1172 "Reserved", /* 28 */ 1173 "Association denied because the requested STA does not support " 1174 "the PCO transition time required by the AP", /* 29 */ 1175 "Reserved", /* 30 */ 1176 "Reserved", /* 31 */ 1177 "Unspecified, QoS-related failure", /* 32 */ 1178 "Association denied due to QAP having insufficient bandwidth " 1179 "to handle another QSTA", /* 33 */ 1180 "Association denied due to excessive frame loss rates and/or " 1181 "poor conditions on current operating channel", /* 34 */ 1182 "Association (with QBSS) denied due to requesting station not " 1183 "supporting the QoS facility", /* 35 */ 1184 "Association denied due to requesting station not supporting " 1185 "Block Ack", /* 36 */ 1186 "The request has been declined", /* 37 */ 1187 "The request has not been successful as one or more parameters " 1188 "have invalid values", /* 38 */ 1189 "The TS has not been created because the request cannot be honored. " 1190 "Try again with the suggested changes to the TSPEC", /* 39 */ 1191 "Invalid Information Element", /* 40 */ 1192 "Group Cipher is not valid", /* 41 */ 1193 "Pairwise Cipher is not valid", /* 42 */ 1194 "AKMP is not valid", /* 43 */ 1195 "Unsupported RSN IE version", /* 44 */ 1196 "Invalid RSN IE Capabilities", /* 45 */ 1197 "Cipher suite is rejected per security policy", /* 46 */ 1198 "The TS has not been created. However, the HC may be capable of " 1199 "creating a TS, in response to a request, after the time indicated " 1200 "in the TS Delay element", /* 47 */ 1201 "Direct Link is not allowed in the BSS by policy", /* 48 */ 1202 "Destination STA is not present within this QBSS.", /* 49 */ 1203 "The Destination STA is not a QSTA.", /* 50 */ 1204 1205 }; 1206 #define NUM_STATUSES (sizeof status_text / sizeof status_text[0]) 1207 1208 static const char *reason_text[] = { 1209 "Reserved", /* 0 */ 1210 "Unspecified reason", /* 1 */ 1211 "Previous authentication no longer valid", /* 2 */ 1212 "Deauthenticated because sending station is leaving (or has left) " 1213 "IBSS or ESS", /* 3 */ 1214 "Disassociated due to inactivity", /* 4 */ 1215 "Disassociated because AP is unable to handle all currently " 1216 " associated stations", /* 5 */ 1217 "Class 2 frame received from nonauthenticated station", /* 6 */ 1218 "Class 3 frame received from nonassociated station", /* 7 */ 1219 "Disassociated because sending station is leaving " 1220 "(or has left) BSS", /* 8 */ 1221 "Station requesting (re)association is not authenticated with " 1222 "responding station", /* 9 */ 1223 "Disassociated because the information in the Power Capability " 1224 "element is unacceptable", /* 10 */ 1225 "Disassociated because the information in the SupportedChannels " 1226 "element is unacceptable", /* 11 */ 1227 "Invalid Information Element", /* 12 */ 1228 "Reserved", /* 13 */ 1229 "Michael MIC failure", /* 14 */ 1230 "4-Way Handshake timeout", /* 15 */ 1231 "Group key update timeout", /* 16 */ 1232 "Information element in 4-Way Handshake different from (Re)Association" 1233 "Request/Probe Response/Beacon", /* 17 */ 1234 "Group Cipher is not valid", /* 18 */ 1235 "AKMP is not valid", /* 20 */ 1236 "Unsupported RSN IE version", /* 21 */ 1237 "Invalid RSN IE Capabilities", /* 22 */ 1238 "IEEE 802.1X Authentication failed", /* 23 */ 1239 "Cipher suite is rejected per security policy", /* 24 */ 1240 "Reserved", /* 25 */ 1241 "Reserved", /* 26 */ 1242 "Reserved", /* 27 */ 1243 "Reserved", /* 28 */ 1244 "Reserved", /* 29 */ 1245 "Reserved", /* 30 */ 1246 "TS deleted because QoS AP lacks sufficient bandwidth for this " 1247 "QoS STA due to a change in BSS service characteristics or " 1248 "operational mode (e.g. an HT BSS change from 40 MHz channel " 1249 "to 20 MHz channel)", /* 31 */ 1250 "Disassociated for unspecified, QoS-related reason", /* 32 */ 1251 "Disassociated because QoS AP lacks sufficient bandwidth for this " 1252 "QoS STA", /* 33 */ 1253 "Disassociated because of excessive number of frames that need to be " 1254 "acknowledged, but are not acknowledged for AP transmissions " 1255 "and/or poor channel conditions", /* 34 */ 1256 "Disassociated because STA is transmitting outside the limits " 1257 "of its TXOPs", /* 35 */ 1258 "Requested from peer STA as the STA is leaving the BSS " 1259 "(or resetting)", /* 36 */ 1260 "Requested from peer STA as it does not want to use the " 1261 "mechanism", /* 37 */ 1262 "Requested from peer STA as the STA received frames using the " 1263 "mechanism for which a set up is required", /* 38 */ 1264 "Requested from peer STA due to time out", /* 39 */ 1265 "Reserved", /* 40 */ 1266 "Reserved", /* 41 */ 1267 "Reserved", /* 42 */ 1268 "Reserved", /* 43 */ 1269 "Reserved", /* 44 */ 1270 "Peer STA does not support the requested cipher suite", /* 45 */ 1271 "Association denied due to requesting STA not supporting HT " 1272 "features", /* 46 */ 1273 }; 1274 #define NUM_REASONS (sizeof reason_text / sizeof reason_text[0]) 1275 1276 static int 1277 wep_print(netdissect_options *ndo, 1278 const u_char *p) 1279 { 1280 uint32_t iv; 1281 1282 if (!ND_TTEST2(*p, IEEE802_11_IV_LEN + IEEE802_11_KID_LEN)) 1283 return 0; 1284 iv = EXTRACT_LE_32BITS(p); 1285 1286 ND_PRINT((ndo, "Data IV:%3x Pad %x KeyID %x", IV_IV(iv), IV_PAD(iv), 1287 IV_KEYID(iv))); 1288 1289 return 1; 1290 } 1291 1292 static int 1293 parse_elements(netdissect_options *ndo, 1294 struct mgmt_body_t *pbody, const u_char *p, int offset, 1295 u_int length) 1296 { 1297 u_int elementlen; 1298 struct ssid_t ssid; 1299 struct challenge_t challenge; 1300 struct rates_t rates; 1301 struct ds_t ds; 1302 struct cf_t cf; 1303 struct tim_t tim; 1304 1305 /* 1306 * We haven't seen any elements yet. 1307 */ 1308 pbody->challenge_present = 0; 1309 pbody->ssid_present = 0; 1310 pbody->rates_present = 0; 1311 pbody->ds_present = 0; 1312 pbody->cf_present = 0; 1313 pbody->tim_present = 0; 1314 1315 while (length != 0) { 1316 /* Make sure we at least have the element ID and length. */ 1317 if (!ND_TTEST2(*(p + offset), 2)) 1318 return 0; 1319 if (length < 2) 1320 return 0; 1321 elementlen = *(p + offset + 1); 1322 1323 /* Make sure we have the entire element. */ 1324 if (!ND_TTEST2(*(p + offset + 2), elementlen)) 1325 return 0; 1326 if (length < elementlen + 2) 1327 return 0; 1328 1329 switch (*(p + offset)) { 1330 case E_SSID: 1331 memcpy(&ssid, p + offset, 2); 1332 offset += 2; 1333 length -= 2; 1334 if (ssid.length != 0) { 1335 if (ssid.length > sizeof(ssid.ssid) - 1) 1336 return 0; 1337 if (!ND_TTEST2(*(p + offset), ssid.length)) 1338 return 0; 1339 if (length < ssid.length) 1340 return 0; 1341 memcpy(&ssid.ssid, p + offset, ssid.length); 1342 offset += ssid.length; 1343 length -= ssid.length; 1344 } 1345 ssid.ssid[ssid.length] = '\0'; 1346 /* 1347 * Present and not truncated. 1348 * 1349 * If we haven't already seen an SSID IE, 1350 * copy this one, otherwise ignore this one, 1351 * so we later report the first one we saw. 1352 */ 1353 if (!pbody->ssid_present) { 1354 pbody->ssid = ssid; 1355 pbody->ssid_present = 1; 1356 } 1357 break; 1358 case E_CHALLENGE: 1359 memcpy(&challenge, p + offset, 2); 1360 offset += 2; 1361 length -= 2; 1362 if (challenge.length != 0) { 1363 if (challenge.length > 1364 sizeof(challenge.text) - 1) 1365 return 0; 1366 if (!ND_TTEST2(*(p + offset), challenge.length)) 1367 return 0; 1368 if (length < challenge.length) 1369 return 0; 1370 memcpy(&challenge.text, p + offset, 1371 challenge.length); 1372 offset += challenge.length; 1373 length -= challenge.length; 1374 } 1375 challenge.text[challenge.length] = '\0'; 1376 /* 1377 * Present and not truncated. 1378 * 1379 * If we haven't already seen a challenge IE, 1380 * copy this one, otherwise ignore this one, 1381 * so we later report the first one we saw. 1382 */ 1383 if (!pbody->challenge_present) { 1384 pbody->challenge = challenge; 1385 pbody->challenge_present = 1; 1386 } 1387 break; 1388 case E_RATES: 1389 memcpy(&rates, p + offset, 2); 1390 offset += 2; 1391 length -= 2; 1392 if (rates.length != 0) { 1393 if (rates.length > sizeof rates.rate) 1394 return 0; 1395 if (!ND_TTEST2(*(p + offset), rates.length)) 1396 return 0; 1397 if (length < rates.length) 1398 return 0; 1399 memcpy(&rates.rate, p + offset, rates.length); 1400 offset += rates.length; 1401 length -= rates.length; 1402 } 1403 /* 1404 * Present and not truncated. 1405 * 1406 * If we haven't already seen a rates IE, 1407 * copy this one if it's not zero-length, 1408 * otherwise ignore this one, so we later 1409 * report the first one we saw. 1410 * 1411 * We ignore zero-length rates IEs as some 1412 * devices seem to put a zero-length rates 1413 * IE, followed by an SSID IE, followed by 1414 * a non-zero-length rates IE into frames, 1415 * even though IEEE Std 802.11-2007 doesn't 1416 * seem to indicate that a zero-length rates 1417 * IE is valid. 1418 */ 1419 if (!pbody->rates_present && rates.length != 0) { 1420 pbody->rates = rates; 1421 pbody->rates_present = 1; 1422 } 1423 break; 1424 case E_DS: 1425 memcpy(&ds, p + offset, 2); 1426 offset += 2; 1427 length -= 2; 1428 if (ds.length != 1) { 1429 offset += ds.length; 1430 length -= ds.length; 1431 break; 1432 } 1433 ds.channel = *(p + offset); 1434 offset += 1; 1435 length -= 1; 1436 /* 1437 * Present and not truncated. 1438 * 1439 * If we haven't already seen a DS IE, 1440 * copy this one, otherwise ignore this one, 1441 * so we later report the first one we saw. 1442 */ 1443 if (!pbody->ds_present) { 1444 pbody->ds = ds; 1445 pbody->ds_present = 1; 1446 } 1447 break; 1448 case E_CF: 1449 memcpy(&cf, p + offset, 2); 1450 offset += 2; 1451 length -= 2; 1452 if (cf.length != 6) { 1453 offset += cf.length; 1454 length -= cf.length; 1455 break; 1456 } 1457 memcpy(&cf.count, p + offset, 6); 1458 offset += 6; 1459 length -= 6; 1460 /* 1461 * Present and not truncated. 1462 * 1463 * If we haven't already seen a CF IE, 1464 * copy this one, otherwise ignore this one, 1465 * so we later report the first one we saw. 1466 */ 1467 if (!pbody->cf_present) { 1468 pbody->cf = cf; 1469 pbody->cf_present = 1; 1470 } 1471 break; 1472 case E_TIM: 1473 memcpy(&tim, p + offset, 2); 1474 offset += 2; 1475 length -= 2; 1476 if (tim.length <= 3) { 1477 offset += tim.length; 1478 length -= tim.length; 1479 break; 1480 } 1481 if (tim.length - 3 > (int)sizeof tim.bitmap) 1482 return 0; 1483 memcpy(&tim.count, p + offset, 3); 1484 offset += 3; 1485 length -= 3; 1486 1487 memcpy(tim.bitmap, p + (tim.length - 3), 1488 (tim.length - 3)); 1489 offset += tim.length - 3; 1490 length -= tim.length - 3; 1491 /* 1492 * Present and not truncated. 1493 * 1494 * If we haven't already seen a TIM IE, 1495 * copy this one, otherwise ignore this one, 1496 * so we later report the first one we saw. 1497 */ 1498 if (!pbody->tim_present) { 1499 pbody->tim = tim; 1500 pbody->tim_present = 1; 1501 } 1502 break; 1503 default: 1504 #if 0 1505 ND_PRINT((ndo, "(1) unhandled element_id (%d) ", 1506 *(p + offset))); 1507 #endif 1508 offset += 2 + elementlen; 1509 length -= 2 + elementlen; 1510 break; 1511 } 1512 } 1513 1514 /* No problems found. */ 1515 return 1; 1516 } 1517 1518 /********************************************************************************* 1519 * Print Handle functions for the management frame types 1520 *********************************************************************************/ 1521 1522 static int 1523 handle_beacon(netdissect_options *ndo, 1524 const u_char *p, u_int length) 1525 { 1526 struct mgmt_body_t pbody; 1527 int offset = 0; 1528 int ret; 1529 1530 memset(&pbody, 0, sizeof(pbody)); 1531 1532 if (!ND_TTEST2(*p, IEEE802_11_TSTAMP_LEN + IEEE802_11_BCNINT_LEN + 1533 IEEE802_11_CAPINFO_LEN)) 1534 return 0; 1535 if (length < IEEE802_11_TSTAMP_LEN + IEEE802_11_BCNINT_LEN + 1536 IEEE802_11_CAPINFO_LEN) 1537 return 0; 1538 memcpy(&pbody.timestamp, p, IEEE802_11_TSTAMP_LEN); 1539 offset += IEEE802_11_TSTAMP_LEN; 1540 length -= IEEE802_11_TSTAMP_LEN; 1541 pbody.beacon_interval = EXTRACT_LE_16BITS(p+offset); 1542 offset += IEEE802_11_BCNINT_LEN; 1543 length -= IEEE802_11_BCNINT_LEN; 1544 pbody.capability_info = EXTRACT_LE_16BITS(p+offset); 1545 offset += IEEE802_11_CAPINFO_LEN; 1546 length -= IEEE802_11_CAPINFO_LEN; 1547 1548 ret = parse_elements(ndo, &pbody, p, offset, length); 1549 1550 PRINT_SSID(pbody); 1551 PRINT_RATES(pbody); 1552 ND_PRINT((ndo, " %s", 1553 CAPABILITY_ESS(pbody.capability_info) ? "ESS" : "IBSS")); 1554 PRINT_DS_CHANNEL(pbody); 1555 1556 return ret; 1557 } 1558 1559 static int 1560 handle_assoc_request(netdissect_options *ndo, 1561 const u_char *p, u_int length) 1562 { 1563 struct mgmt_body_t pbody; 1564 int offset = 0; 1565 int ret; 1566 1567 memset(&pbody, 0, sizeof(pbody)); 1568 1569 if (!ND_TTEST2(*p, IEEE802_11_CAPINFO_LEN + IEEE802_11_LISTENINT_LEN)) 1570 return 0; 1571 if (length < IEEE802_11_CAPINFO_LEN + IEEE802_11_LISTENINT_LEN) 1572 return 0; 1573 pbody.capability_info = EXTRACT_LE_16BITS(p); 1574 offset += IEEE802_11_CAPINFO_LEN; 1575 length -= IEEE802_11_CAPINFO_LEN; 1576 pbody.listen_interval = EXTRACT_LE_16BITS(p+offset); 1577 offset += IEEE802_11_LISTENINT_LEN; 1578 length -= IEEE802_11_LISTENINT_LEN; 1579 1580 ret = parse_elements(ndo, &pbody, p, offset, length); 1581 1582 PRINT_SSID(pbody); 1583 PRINT_RATES(pbody); 1584 return ret; 1585 } 1586 1587 static int 1588 handle_assoc_response(netdissect_options *ndo, 1589 const u_char *p, u_int length) 1590 { 1591 struct mgmt_body_t pbody; 1592 int offset = 0; 1593 int ret; 1594 1595 memset(&pbody, 0, sizeof(pbody)); 1596 1597 if (!ND_TTEST2(*p, IEEE802_11_CAPINFO_LEN + IEEE802_11_STATUS_LEN + 1598 IEEE802_11_AID_LEN)) 1599 return 0; 1600 if (length < IEEE802_11_CAPINFO_LEN + IEEE802_11_STATUS_LEN + 1601 IEEE802_11_AID_LEN) 1602 return 0; 1603 pbody.capability_info = EXTRACT_LE_16BITS(p); 1604 offset += IEEE802_11_CAPINFO_LEN; 1605 length -= IEEE802_11_CAPINFO_LEN; 1606 pbody.status_code = EXTRACT_LE_16BITS(p+offset); 1607 offset += IEEE802_11_STATUS_LEN; 1608 length -= IEEE802_11_STATUS_LEN; 1609 pbody.aid = EXTRACT_LE_16BITS(p+offset); 1610 offset += IEEE802_11_AID_LEN; 1611 length -= IEEE802_11_AID_LEN; 1612 1613 ret = parse_elements(ndo, &pbody, p, offset, length); 1614 1615 ND_PRINT((ndo, " AID(%x) :%s: %s", ((uint16_t)(pbody.aid << 2 )) >> 2 , 1616 CAPABILITY_PRIVACY(pbody.capability_info) ? " PRIVACY " : "", 1617 (pbody.status_code < NUM_STATUSES 1618 ? status_text[pbody.status_code] 1619 : "n/a"))); 1620 1621 return ret; 1622 } 1623 1624 static int 1625 handle_reassoc_request(netdissect_options *ndo, 1626 const u_char *p, u_int length) 1627 { 1628 struct mgmt_body_t pbody; 1629 int offset = 0; 1630 int ret; 1631 1632 memset(&pbody, 0, sizeof(pbody)); 1633 1634 if (!ND_TTEST2(*p, IEEE802_11_CAPINFO_LEN + IEEE802_11_LISTENINT_LEN + 1635 IEEE802_11_AP_LEN)) 1636 return 0; 1637 if (length < IEEE802_11_CAPINFO_LEN + IEEE802_11_LISTENINT_LEN + 1638 IEEE802_11_AP_LEN) 1639 return 0; 1640 pbody.capability_info = EXTRACT_LE_16BITS(p); 1641 offset += IEEE802_11_CAPINFO_LEN; 1642 length -= IEEE802_11_CAPINFO_LEN; 1643 pbody.listen_interval = EXTRACT_LE_16BITS(p+offset); 1644 offset += IEEE802_11_LISTENINT_LEN; 1645 length -= IEEE802_11_LISTENINT_LEN; 1646 memcpy(&pbody.ap, p+offset, IEEE802_11_AP_LEN); 1647 offset += IEEE802_11_AP_LEN; 1648 length -= IEEE802_11_AP_LEN; 1649 1650 ret = parse_elements(ndo, &pbody, p, offset, length); 1651 1652 PRINT_SSID(pbody); 1653 ND_PRINT((ndo, " AP : %s", etheraddr_string(ndo, pbody.ap ))); 1654 1655 return ret; 1656 } 1657 1658 static int 1659 handle_reassoc_response(netdissect_options *ndo, 1660 const u_char *p, u_int length) 1661 { 1662 /* Same as a Association Reponse */ 1663 return handle_assoc_response(ndo, p, length); 1664 } 1665 1666 static int 1667 handle_probe_request(netdissect_options *ndo, 1668 const u_char *p, u_int length) 1669 { 1670 struct mgmt_body_t pbody; 1671 int offset = 0; 1672 int ret; 1673 1674 memset(&pbody, 0, sizeof(pbody)); 1675 1676 ret = parse_elements(ndo, &pbody, p, offset, length); 1677 1678 PRINT_SSID(pbody); 1679 PRINT_RATES(pbody); 1680 1681 return ret; 1682 } 1683 1684 static int 1685 handle_probe_response(netdissect_options *ndo, 1686 const u_char *p, u_int length) 1687 { 1688 struct mgmt_body_t pbody; 1689 int offset = 0; 1690 int ret; 1691 1692 memset(&pbody, 0, sizeof(pbody)); 1693 1694 if (!ND_TTEST2(*p, IEEE802_11_TSTAMP_LEN + IEEE802_11_BCNINT_LEN + 1695 IEEE802_11_CAPINFO_LEN)) 1696 return 0; 1697 if (length < IEEE802_11_TSTAMP_LEN + IEEE802_11_BCNINT_LEN + 1698 IEEE802_11_CAPINFO_LEN) 1699 return 0; 1700 memcpy(&pbody.timestamp, p, IEEE802_11_TSTAMP_LEN); 1701 offset += IEEE802_11_TSTAMP_LEN; 1702 length -= IEEE802_11_TSTAMP_LEN; 1703 pbody.beacon_interval = EXTRACT_LE_16BITS(p+offset); 1704 offset += IEEE802_11_BCNINT_LEN; 1705 length -= IEEE802_11_BCNINT_LEN; 1706 pbody.capability_info = EXTRACT_LE_16BITS(p+offset); 1707 offset += IEEE802_11_CAPINFO_LEN; 1708 length -= IEEE802_11_CAPINFO_LEN; 1709 1710 ret = parse_elements(ndo, &pbody, p, offset, length); 1711 1712 PRINT_SSID(pbody); 1713 PRINT_RATES(pbody); 1714 PRINT_DS_CHANNEL(pbody); 1715 1716 return ret; 1717 } 1718 1719 static int 1720 handle_atim(void) 1721 { 1722 /* the frame body for ATIM is null. */ 1723 return 1; 1724 } 1725 1726 static int 1727 handle_disassoc(netdissect_options *ndo, 1728 const u_char *p, u_int length) 1729 { 1730 struct mgmt_body_t pbody; 1731 1732 memset(&pbody, 0, sizeof(pbody)); 1733 1734 if (!ND_TTEST2(*p, IEEE802_11_REASON_LEN)) 1735 return 0; 1736 if (length < IEEE802_11_REASON_LEN) 1737 return 0; 1738 pbody.reason_code = EXTRACT_LE_16BITS(p); 1739 1740 ND_PRINT((ndo, ": %s", 1741 (pbody.reason_code < NUM_REASONS) 1742 ? reason_text[pbody.reason_code] 1743 : "Reserved")); 1744 1745 return 1; 1746 } 1747 1748 static int 1749 handle_auth(netdissect_options *ndo, 1750 const u_char *p, u_int length) 1751 { 1752 struct mgmt_body_t pbody; 1753 int offset = 0; 1754 int ret; 1755 1756 memset(&pbody, 0, sizeof(pbody)); 1757 1758 if (!ND_TTEST2(*p, 6)) 1759 return 0; 1760 if (length < 6) 1761 return 0; 1762 pbody.auth_alg = EXTRACT_LE_16BITS(p); 1763 offset += 2; 1764 length -= 2; 1765 pbody.auth_trans_seq_num = EXTRACT_LE_16BITS(p + offset); 1766 offset += 2; 1767 length -= 2; 1768 pbody.status_code = EXTRACT_LE_16BITS(p + offset); 1769 offset += 2; 1770 length -= 2; 1771 1772 ret = parse_elements(ndo, &pbody, p, offset, length); 1773 1774 if ((pbody.auth_alg == 1) && 1775 ((pbody.auth_trans_seq_num == 2) || 1776 (pbody.auth_trans_seq_num == 3))) { 1777 ND_PRINT((ndo, " (%s)-%x [Challenge Text] %s", 1778 (pbody.auth_alg < NUM_AUTH_ALGS) 1779 ? auth_alg_text[pbody.auth_alg] 1780 : "Reserved", 1781 pbody.auth_trans_seq_num, 1782 ((pbody.auth_trans_seq_num % 2) 1783 ? ((pbody.status_code < NUM_STATUSES) 1784 ? status_text[pbody.status_code] 1785 : "n/a") : ""))); 1786 return ret; 1787 } 1788 ND_PRINT((ndo, " (%s)-%x: %s", 1789 (pbody.auth_alg < NUM_AUTH_ALGS) 1790 ? auth_alg_text[pbody.auth_alg] 1791 : "Reserved", 1792 pbody.auth_trans_seq_num, 1793 (pbody.auth_trans_seq_num % 2) 1794 ? ((pbody.status_code < NUM_STATUSES) 1795 ? status_text[pbody.status_code] 1796 : "n/a") 1797 : "")); 1798 1799 return ret; 1800 } 1801 1802 static int 1803 handle_deauth(netdissect_options *ndo, 1804 const struct mgmt_header_t *pmh, const u_char *p, u_int length) 1805 { 1806 struct mgmt_body_t pbody; 1807 const char *reason = NULL; 1808 1809 memset(&pbody, 0, sizeof(pbody)); 1810 1811 if (!ND_TTEST2(*p, IEEE802_11_REASON_LEN)) 1812 return 0; 1813 if (length < IEEE802_11_REASON_LEN) 1814 return 0; 1815 pbody.reason_code = EXTRACT_LE_16BITS(p); 1816 1817 reason = (pbody.reason_code < NUM_REASONS) 1818 ? reason_text[pbody.reason_code] 1819 : "Reserved"; 1820 1821 if (ndo->ndo_eflag) { 1822 ND_PRINT((ndo, ": %s", reason)); 1823 } else { 1824 ND_PRINT((ndo, " (%s): %s", etheraddr_string(ndo, pmh->sa), reason)); 1825 } 1826 return 1; 1827 } 1828 1829 #define PRINT_HT_ACTION(v) (\ 1830 (v) == 0 ? ND_PRINT((ndo, "TxChWidth")) : \ 1831 (v) == 1 ? ND_PRINT((ndo, "MIMOPwrSave")) : \ 1832 ND_PRINT((ndo, "Act#%d", (v))) \ 1833 ) 1834 #define PRINT_BA_ACTION(v) (\ 1835 (v) == 0 ? ND_PRINT((ndo, "ADDBA Request")) : \ 1836 (v) == 1 ? ND_PRINT((ndo, "ADDBA Response")) : \ 1837 (v) == 2 ? ND_PRINT((ndo, "DELBA")) : \ 1838 ND_PRINT((ndo, "Act#%d", (v))) \ 1839 ) 1840 #define PRINT_MESHLINK_ACTION(v) (\ 1841 (v) == 0 ? ND_PRINT((ndo, "Request")) : \ 1842 (v) == 1 ? ND_PRINT((ndo, "Report")) : \ 1843 ND_PRINT((ndo, "Act#%d", (v))) \ 1844 ) 1845 #define PRINT_MESHPEERING_ACTION(v) (\ 1846 (v) == 0 ? ND_PRINT((ndo, "Open")) : \ 1847 (v) == 1 ? ND_PRINT((ndo, "Confirm")) : \ 1848 (v) == 2 ? ND_PRINT((ndo, "Close")) : \ 1849 ND_PRINT((ndo, "Act#%d", (v))) \ 1850 ) 1851 #define PRINT_MESHPATH_ACTION(v) (\ 1852 (v) == 0 ? ND_PRINT((ndo, "Request")) : \ 1853 (v) == 1 ? ND_PRINT((ndo, "Report")) : \ 1854 (v) == 2 ? ND_PRINT((ndo, "Error")) : \ 1855 (v) == 3 ? ND_PRINT((ndo, "RootAnnouncement")) : \ 1856 ND_PRINT((ndo, "Act#%d", (v))) \ 1857 ) 1858 1859 #define PRINT_MESH_ACTION(v) (\ 1860 (v) == 0 ? ND_PRINT((ndo, "MeshLink")) : \ 1861 (v) == 1 ? ND_PRINT((ndo, "HWMP")) : \ 1862 (v) == 2 ? ND_PRINT((ndo, "Gate Announcement")) : \ 1863 (v) == 3 ? ND_PRINT((ndo, "Congestion Control")) : \ 1864 (v) == 4 ? ND_PRINT((ndo, "MCCA Setup Request")) : \ 1865 (v) == 5 ? ND_PRINT((ndo, "MCCA Setup Reply")) : \ 1866 (v) == 6 ? ND_PRINT((ndo, "MCCA Advertisement Request")) : \ 1867 (v) == 7 ? ND_PRINT((ndo, "MCCA Advertisement")) : \ 1868 (v) == 8 ? ND_PRINT((ndo, "MCCA Teardown")) : \ 1869 (v) == 9 ? ND_PRINT((ndo, "TBTT Adjustment Request")) : \ 1870 (v) == 10 ? ND_PRINT((ndo, "TBTT Adjustment Response")) : \ 1871 ND_PRINT((ndo, "Act#%d", (v))) \ 1872 ) 1873 #define PRINT_MULTIHOP_ACTION(v) (\ 1874 (v) == 0 ? ND_PRINT((ndo, "Proxy Update")) : \ 1875 (v) == 1 ? ND_PRINT((ndo, "Proxy Update Confirmation")) : \ 1876 ND_PRINT((ndo, "Act#%d", (v))) \ 1877 ) 1878 #define PRINT_SELFPROT_ACTION(v) (\ 1879 (v) == 1 ? ND_PRINT((ndo, "Peering Open")) : \ 1880 (v) == 2 ? ND_PRINT((ndo, "Peering Confirm")) : \ 1881 (v) == 3 ? ND_PRINT((ndo, "Peering Close")) : \ 1882 (v) == 4 ? ND_PRINT((ndo, "Group Key Inform")) : \ 1883 (v) == 5 ? ND_PRINT((ndo, "Group Key Acknowledge")) : \ 1884 ND_PRINT((ndo, "Act#%d", (v))) \ 1885 ) 1886 1887 static int 1888 handle_action(netdissect_options *ndo, 1889 const struct mgmt_header_t *pmh, const u_char *p, u_int length) 1890 { 1891 if (!ND_TTEST2(*p, 2)) 1892 return 0; 1893 if (length < 2) 1894 return 0; 1895 if (ndo->ndo_eflag) { 1896 ND_PRINT((ndo, ": ")); 1897 } else { 1898 ND_PRINT((ndo, " (%s): ", etheraddr_string(ndo, pmh->sa))); 1899 } 1900 switch (p[0]) { 1901 case 0: ND_PRINT((ndo, "Spectrum Management Act#%d", p[1])); break; 1902 case 1: ND_PRINT((ndo, "QoS Act#%d", p[1])); break; 1903 case 2: ND_PRINT((ndo, "DLS Act#%d", p[1])); break; 1904 case 3: ND_PRINT((ndo, "BA ")); PRINT_BA_ACTION(p[1]); break; 1905 case 7: ND_PRINT((ndo, "HT ")); PRINT_HT_ACTION(p[1]); break; 1906 case 13: ND_PRINT((ndo, "MeshAction ")); PRINT_MESH_ACTION(p[1]); break; 1907 case 14: 1908 ND_PRINT((ndo, "MultiohopAction ")); 1909 PRINT_MULTIHOP_ACTION(p[1]); break; 1910 case 15: 1911 ND_PRINT((ndo, "SelfprotectAction ")); 1912 PRINT_SELFPROT_ACTION(p[1]); break; 1913 case 127: ND_PRINT((ndo, "Vendor Act#%d", p[1])); break; 1914 default: 1915 ND_PRINT((ndo, "Reserved(%d) Act#%d", p[0], p[1])); 1916 break; 1917 } 1918 return 1; 1919 } 1920 1921 1922 /********************************************************************************* 1923 * Print Body funcs 1924 *********************************************************************************/ 1925 1926 1927 static int 1928 mgmt_body_print(netdissect_options *ndo, 1929 uint16_t fc, const struct mgmt_header_t *pmh, 1930 const u_char *p, u_int length) 1931 { 1932 ND_PRINT((ndo, "%s", tok2str(st_str, "Unhandled Management subtype(%x)", FC_SUBTYPE(fc)))); 1933 switch (FC_SUBTYPE(fc)) { 1934 case ST_ASSOC_REQUEST: 1935 return handle_assoc_request(ndo, p, length); 1936 case ST_ASSOC_RESPONSE: 1937 return handle_assoc_response(ndo, p, length); 1938 case ST_REASSOC_REQUEST: 1939 return handle_reassoc_request(ndo, p, length); 1940 case ST_REASSOC_RESPONSE: 1941 return handle_reassoc_response(ndo, p, length); 1942 case ST_PROBE_REQUEST: 1943 return handle_probe_request(ndo, p, length); 1944 case ST_PROBE_RESPONSE: 1945 return handle_probe_response(ndo, p, length); 1946 case ST_BEACON: 1947 return handle_beacon(ndo, p, length); 1948 case ST_ATIM: 1949 return handle_atim(); 1950 case ST_DISASSOC: 1951 return handle_disassoc(ndo, p, length); 1952 case ST_AUTH: 1953 if (!ND_TTEST2(*p, 3)) 1954 return 0; 1955 if ((p[0] == 0 ) && (p[1] == 0) && (p[2] == 0)) { 1956 ND_PRINT((ndo, "Authentication (Shared-Key)-3 ")); 1957 return wep_print(ndo, p); 1958 } 1959 return handle_auth(ndo, p, length); 1960 case ST_DEAUTH: 1961 return handle_deauth(ndo, pmh, p, length); 1962 case ST_ACTION: 1963 return handle_action(ndo, pmh, p, length); 1964 default: 1965 return 1; 1966 } 1967 } 1968 1969 1970 /********************************************************************************* 1971 * Handles printing all the control frame types 1972 *********************************************************************************/ 1973 1974 static int 1975 ctrl_body_print(netdissect_options *ndo, 1976 uint16_t fc, const u_char *p) 1977 { 1978 ND_PRINT((ndo, "%s", tok2str(ctrl_str, "Unknown Ctrl Subtype", FC_SUBTYPE(fc)))); 1979 switch (FC_SUBTYPE(fc)) { 1980 case CTRL_CONTROL_WRAPPER: 1981 /* XXX - requires special handling */ 1982 break; 1983 case CTRL_BAR: 1984 if (!ND_TTEST2(*p, CTRL_BAR_HDRLEN)) 1985 return 0; 1986 if (!ndo->ndo_eflag) 1987 ND_PRINT((ndo, " RA:%s TA:%s CTL(%x) SEQ(%u) ", 1988 etheraddr_string(ndo, ((const struct ctrl_bar_t *)p)->ra), 1989 etheraddr_string(ndo, ((const struct ctrl_bar_t *)p)->ta), 1990 EXTRACT_LE_16BITS(&(((const struct ctrl_bar_t *)p)->ctl)), 1991 EXTRACT_LE_16BITS(&(((const struct ctrl_bar_t *)p)->seq)))); 1992 break; 1993 case CTRL_BA: 1994 if (!ND_TTEST2(*p, CTRL_BA_HDRLEN)) 1995 return 0; 1996 if (!ndo->ndo_eflag) 1997 ND_PRINT((ndo, " RA:%s ", 1998 etheraddr_string(ndo, ((const struct ctrl_ba_t *)p)->ra))); 1999 break; 2000 case CTRL_PS_POLL: 2001 if (!ND_TTEST2(*p, CTRL_PS_POLL_HDRLEN)) 2002 return 0; 2003 ND_PRINT((ndo, " AID(%x)", 2004 EXTRACT_LE_16BITS(&(((const struct ctrl_ps_poll_t *)p)->aid)))); 2005 break; 2006 case CTRL_RTS: 2007 if (!ND_TTEST2(*p, CTRL_RTS_HDRLEN)) 2008 return 0; 2009 if (!ndo->ndo_eflag) 2010 ND_PRINT((ndo, " TA:%s ", 2011 etheraddr_string(ndo, ((const struct ctrl_rts_t *)p)->ta))); 2012 break; 2013 case CTRL_CTS: 2014 if (!ND_TTEST2(*p, CTRL_CTS_HDRLEN)) 2015 return 0; 2016 if (!ndo->ndo_eflag) 2017 ND_PRINT((ndo, " RA:%s ", 2018 etheraddr_string(ndo, ((const struct ctrl_cts_t *)p)->ra))); 2019 break; 2020 case CTRL_ACK: 2021 if (!ND_TTEST2(*p, CTRL_ACK_HDRLEN)) 2022 return 0; 2023 if (!ndo->ndo_eflag) 2024 ND_PRINT((ndo, " RA:%s ", 2025 etheraddr_string(ndo, ((const struct ctrl_ack_t *)p)->ra))); 2026 break; 2027 case CTRL_CF_END: 2028 if (!ND_TTEST2(*p, CTRL_END_HDRLEN)) 2029 return 0; 2030 if (!ndo->ndo_eflag) 2031 ND_PRINT((ndo, " RA:%s ", 2032 etheraddr_string(ndo, ((const struct ctrl_end_t *)p)->ra))); 2033 break; 2034 case CTRL_END_ACK: 2035 if (!ND_TTEST2(*p, CTRL_END_ACK_HDRLEN)) 2036 return 0; 2037 if (!ndo->ndo_eflag) 2038 ND_PRINT((ndo, " RA:%s ", 2039 etheraddr_string(ndo, ((const struct ctrl_end_ack_t *)p)->ra))); 2040 break; 2041 } 2042 return 1; 2043 } 2044 2045 /* 2046 * Print Header funcs 2047 */ 2048 2049 /* 2050 * Data Frame - Address field contents 2051 * 2052 * To Ds | From DS | Addr 1 | Addr 2 | Addr 3 | Addr 4 2053 * 0 | 0 | DA | SA | BSSID | n/a 2054 * 0 | 1 | DA | BSSID | SA | n/a 2055 * 1 | 0 | BSSID | SA | DA | n/a 2056 * 1 | 1 | RA | TA | DA | SA 2057 */ 2058 2059 static void 2060 data_header_print(netdissect_options *ndo, 2061 uint16_t fc, const u_char *p, const uint8_t **srcp, 2062 const uint8_t **dstp) 2063 { 2064 u_int subtype = FC_SUBTYPE(fc); 2065 2066 if (DATA_FRAME_IS_CF_ACK(subtype) || DATA_FRAME_IS_CF_POLL(subtype) || 2067 DATA_FRAME_IS_QOS(subtype)) { 2068 ND_PRINT((ndo, "CF ")); 2069 if (DATA_FRAME_IS_CF_ACK(subtype)) { 2070 if (DATA_FRAME_IS_CF_POLL(subtype)) 2071 ND_PRINT((ndo, "Ack/Poll")); 2072 else 2073 ND_PRINT((ndo, "Ack")); 2074 } else { 2075 if (DATA_FRAME_IS_CF_POLL(subtype)) 2076 ND_PRINT((ndo, "Poll")); 2077 } 2078 if (DATA_FRAME_IS_QOS(subtype)) 2079 ND_PRINT((ndo, "+QoS")); 2080 ND_PRINT((ndo, " ")); 2081 } 2082 2083 #define ADDR1 (p + 4) 2084 #define ADDR2 (p + 10) 2085 #define ADDR3 (p + 16) 2086 #define ADDR4 (p + 24) 2087 2088 if (!FC_TO_DS(fc) && !FC_FROM_DS(fc)) { 2089 if (srcp != NULL) 2090 *srcp = ADDR2; 2091 if (dstp != NULL) 2092 *dstp = ADDR1; 2093 if (!ndo->ndo_eflag) 2094 return; 2095 ND_PRINT((ndo, "DA:%s SA:%s BSSID:%s ", 2096 etheraddr_string(ndo, ADDR1), etheraddr_string(ndo, ADDR2), 2097 etheraddr_string(ndo, ADDR3))); 2098 } else if (!FC_TO_DS(fc) && FC_FROM_DS(fc)) { 2099 if (srcp != NULL) 2100 *srcp = ADDR3; 2101 if (dstp != NULL) 2102 *dstp = ADDR1; 2103 if (!ndo->ndo_eflag) 2104 return; 2105 ND_PRINT((ndo, "DA:%s BSSID:%s SA:%s ", 2106 etheraddr_string(ndo, ADDR1), etheraddr_string(ndo, ADDR2), 2107 etheraddr_string(ndo, ADDR3))); 2108 } else if (FC_TO_DS(fc) && !FC_FROM_DS(fc)) { 2109 if (srcp != NULL) 2110 *srcp = ADDR2; 2111 if (dstp != NULL) 2112 *dstp = ADDR3; 2113 if (!ndo->ndo_eflag) 2114 return; 2115 ND_PRINT((ndo, "BSSID:%s SA:%s DA:%s ", 2116 etheraddr_string(ndo, ADDR1), etheraddr_string(ndo, ADDR2), 2117 etheraddr_string(ndo, ADDR3))); 2118 } else if (FC_TO_DS(fc) && FC_FROM_DS(fc)) { 2119 if (srcp != NULL) 2120 *srcp = ADDR4; 2121 if (dstp != NULL) 2122 *dstp = ADDR3; 2123 if (!ndo->ndo_eflag) 2124 return; 2125 ND_PRINT((ndo, "RA:%s TA:%s DA:%s SA:%s ", 2126 etheraddr_string(ndo, ADDR1), etheraddr_string(ndo, ADDR2), 2127 etheraddr_string(ndo, ADDR3), etheraddr_string(ndo, ADDR4))); 2128 } 2129 2130 #undef ADDR1 2131 #undef ADDR2 2132 #undef ADDR3 2133 #undef ADDR4 2134 } 2135 2136 static void 2137 mgmt_header_print(netdissect_options *ndo, 2138 const u_char *p, const uint8_t **srcp, const uint8_t **dstp) 2139 { 2140 const struct mgmt_header_t *hp = (const struct mgmt_header_t *) p; 2141 2142 if (srcp != NULL) 2143 *srcp = hp->sa; 2144 if (dstp != NULL) 2145 *dstp = hp->da; 2146 if (!ndo->ndo_eflag) 2147 return; 2148 2149 ND_PRINT((ndo, "BSSID:%s DA:%s SA:%s ", 2150 etheraddr_string(ndo, (hp)->bssid), etheraddr_string(ndo, (hp)->da), 2151 etheraddr_string(ndo, (hp)->sa))); 2152 } 2153 2154 static void 2155 ctrl_header_print(netdissect_options *ndo, 2156 uint16_t fc, const u_char *p, const uint8_t **srcp, 2157 const uint8_t **dstp) 2158 { 2159 if (srcp != NULL) 2160 *srcp = NULL; 2161 if (dstp != NULL) 2162 *dstp = NULL; 2163 if (!ndo->ndo_eflag) 2164 return; 2165 2166 switch (FC_SUBTYPE(fc)) { 2167 case CTRL_BAR: 2168 ND_PRINT((ndo, " RA:%s TA:%s CTL(%x) SEQ(%u) ", 2169 etheraddr_string(ndo, ((const struct ctrl_bar_t *)p)->ra), 2170 etheraddr_string(ndo, ((const struct ctrl_bar_t *)p)->ta), 2171 EXTRACT_LE_16BITS(&(((const struct ctrl_bar_t *)p)->ctl)), 2172 EXTRACT_LE_16BITS(&(((const struct ctrl_bar_t *)p)->seq)))); 2173 break; 2174 case CTRL_BA: 2175 ND_PRINT((ndo, "RA:%s ", 2176 etheraddr_string(ndo, ((const struct ctrl_ba_t *)p)->ra))); 2177 break; 2178 case CTRL_PS_POLL: 2179 ND_PRINT((ndo, "BSSID:%s TA:%s ", 2180 etheraddr_string(ndo, ((const struct ctrl_ps_poll_t *)p)->bssid), 2181 etheraddr_string(ndo, ((const struct ctrl_ps_poll_t *)p)->ta))); 2182 break; 2183 case CTRL_RTS: 2184 ND_PRINT((ndo, "RA:%s TA:%s ", 2185 etheraddr_string(ndo, ((const struct ctrl_rts_t *)p)->ra), 2186 etheraddr_string(ndo, ((const struct ctrl_rts_t *)p)->ta))); 2187 break; 2188 case CTRL_CTS: 2189 ND_PRINT((ndo, "RA:%s ", 2190 etheraddr_string(ndo, ((const struct ctrl_cts_t *)p)->ra))); 2191 break; 2192 case CTRL_ACK: 2193 ND_PRINT((ndo, "RA:%s ", 2194 etheraddr_string(ndo, ((const struct ctrl_ack_t *)p)->ra))); 2195 break; 2196 case CTRL_CF_END: 2197 ND_PRINT((ndo, "RA:%s BSSID:%s ", 2198 etheraddr_string(ndo, ((const struct ctrl_end_t *)p)->ra), 2199 etheraddr_string(ndo, ((const struct ctrl_end_t *)p)->bssid))); 2200 break; 2201 case CTRL_END_ACK: 2202 ND_PRINT((ndo, "RA:%s BSSID:%s ", 2203 etheraddr_string(ndo, ((const struct ctrl_end_ack_t *)p)->ra), 2204 etheraddr_string(ndo, ((const struct ctrl_end_ack_t *)p)->bssid))); 2205 break; 2206 default: 2207 ND_PRINT((ndo, "(H) Unknown Ctrl Subtype")); 2208 break; 2209 } 2210 } 2211 2212 static int 2213 extract_header_length(netdissect_options *ndo, 2214 uint16_t fc) 2215 { 2216 int len; 2217 2218 switch (FC_TYPE(fc)) { 2219 case T_MGMT: 2220 return MGMT_HDRLEN; 2221 case T_CTRL: 2222 switch (FC_SUBTYPE(fc)) { 2223 case CTRL_BAR: 2224 return CTRL_BAR_HDRLEN; 2225 case CTRL_PS_POLL: 2226 return CTRL_PS_POLL_HDRLEN; 2227 case CTRL_RTS: 2228 return CTRL_RTS_HDRLEN; 2229 case CTRL_CTS: 2230 return CTRL_CTS_HDRLEN; 2231 case CTRL_ACK: 2232 return CTRL_ACK_HDRLEN; 2233 case CTRL_CF_END: 2234 return CTRL_END_HDRLEN; 2235 case CTRL_END_ACK: 2236 return CTRL_END_ACK_HDRLEN; 2237 default: 2238 return 0; 2239 } 2240 case T_DATA: 2241 len = (FC_TO_DS(fc) && FC_FROM_DS(fc)) ? 30 : 24; 2242 if (DATA_FRAME_IS_QOS(FC_SUBTYPE(fc))) 2243 len += 2; 2244 return len; 2245 default: 2246 ND_PRINT((ndo, "unknown IEEE802.11 frame type (%d)", FC_TYPE(fc))); 2247 return 0; 2248 } 2249 } 2250 2251 static int 2252 extract_mesh_header_length(const u_char *p) 2253 { 2254 return (p[0] &~ 3) ? 0 : 6*(1 + (p[0] & 3)); 2255 } 2256 2257 /* 2258 * Print the 802.11 MAC header if eflag is set, and set "*srcp" and "*dstp" 2259 * to point to the source and destination MAC addresses in any case if 2260 * "srcp" and "dstp" aren't null. 2261 */ 2262 static void 2263 ieee_802_11_hdr_print(netdissect_options *ndo, 2264 uint16_t fc, const u_char *p, u_int hdrlen, 2265 u_int meshdrlen, const uint8_t **srcp, 2266 const uint8_t **dstp) 2267 { 2268 if (ndo->ndo_vflag) { 2269 if (FC_MORE_DATA(fc)) 2270 ND_PRINT((ndo, "More Data ")); 2271 if (FC_MORE_FLAG(fc)) 2272 ND_PRINT((ndo, "More Fragments ")); 2273 if (FC_POWER_MGMT(fc)) 2274 ND_PRINT((ndo, "Pwr Mgmt ")); 2275 if (FC_RETRY(fc)) 2276 ND_PRINT((ndo, "Retry ")); 2277 if (FC_ORDER(fc)) 2278 ND_PRINT((ndo, "Strictly Ordered ")); 2279 if (FC_WEP(fc)) 2280 ND_PRINT((ndo, "WEP Encrypted ")); 2281 if (FC_TYPE(fc) != T_CTRL || FC_SUBTYPE(fc) != CTRL_PS_POLL) 2282 ND_PRINT((ndo, "%dus ", 2283 EXTRACT_LE_16BITS( 2284 &((const struct mgmt_header_t *)p)->duration))); 2285 } 2286 if (meshdrlen != 0) { 2287 const struct meshcntl_t *mc = 2288 (const struct meshcntl_t *)&p[hdrlen - meshdrlen]; 2289 int ae = mc->flags & 3; 2290 2291 ND_PRINT((ndo, "MeshData (AE %d TTL %u seq %u", ae, mc->ttl, 2292 EXTRACT_LE_32BITS(mc->seq))); 2293 if (ae > 0) 2294 ND_PRINT((ndo, " A4:%s", etheraddr_string(ndo, mc->addr4))); 2295 if (ae > 1) 2296 ND_PRINT((ndo, " A5:%s", etheraddr_string(ndo, mc->addr5))); 2297 if (ae > 2) 2298 ND_PRINT((ndo, " A6:%s", etheraddr_string(ndo, mc->addr6))); 2299 ND_PRINT((ndo, ") ")); 2300 } 2301 2302 switch (FC_TYPE(fc)) { 2303 case T_MGMT: 2304 mgmt_header_print(ndo, p, srcp, dstp); 2305 break; 2306 case T_CTRL: 2307 ctrl_header_print(ndo, fc, p, srcp, dstp); 2308 break; 2309 case T_DATA: 2310 data_header_print(ndo, fc, p, srcp, dstp); 2311 break; 2312 default: 2313 ND_PRINT((ndo, "(header) unknown IEEE802.11 frame type (%d)", 2314 FC_TYPE(fc))); 2315 *srcp = NULL; 2316 *dstp = NULL; 2317 break; 2318 } 2319 } 2320 2321 #ifndef roundup2 2322 #define roundup2(x, y) (((x)+((y)-1))&(~((y)-1))) /* if y is powers of two */ 2323 #endif 2324 2325 static u_int 2326 ieee802_11_print(netdissect_options *ndo, 2327 const u_char *p, u_int length, u_int orig_caplen, int pad, 2328 u_int fcslen) 2329 { 2330 uint16_t fc; 2331 u_int caplen, hdrlen, meshdrlen; 2332 const uint8_t *src, *dst; 2333 u_short extracted_ethertype; 2334 2335 caplen = orig_caplen; 2336 /* Remove FCS, if present */ 2337 if (length < fcslen) { 2338 ND_PRINT((ndo, "%s", tstr)); 2339 return caplen; 2340 } 2341 length -= fcslen; 2342 if (caplen > length) { 2343 /* Amount of FCS in actual packet data, if any */ 2344 fcslen = caplen - length; 2345 caplen -= fcslen; 2346 ndo->ndo_snapend -= fcslen; 2347 } 2348 2349 if (caplen < IEEE802_11_FC_LEN) { 2350 ND_PRINT((ndo, "%s", tstr)); 2351 return orig_caplen; 2352 } 2353 2354 fc = EXTRACT_LE_16BITS(p); 2355 hdrlen = extract_header_length(ndo, fc); 2356 if (pad) 2357 hdrlen = roundup2(hdrlen, 4); 2358 if (ndo->ndo_Hflag && FC_TYPE(fc) == T_DATA && 2359 DATA_FRAME_IS_QOS(FC_SUBTYPE(fc))) { 2360 meshdrlen = extract_mesh_header_length(p+hdrlen); 2361 hdrlen += meshdrlen; 2362 } else 2363 meshdrlen = 0; 2364 2365 2366 if (caplen < hdrlen) { 2367 ND_PRINT((ndo, "%s", tstr)); 2368 return hdrlen; 2369 } 2370 2371 ieee_802_11_hdr_print(ndo, fc, p, hdrlen, meshdrlen, &src, &dst); 2372 2373 /* 2374 * Go past the 802.11 header. 2375 */ 2376 length -= hdrlen; 2377 caplen -= hdrlen; 2378 p += hdrlen; 2379 2380 switch (FC_TYPE(fc)) { 2381 case T_MGMT: 2382 if (!mgmt_body_print(ndo, fc, 2383 (const struct mgmt_header_t *)(p - hdrlen), p, length)) { 2384 ND_PRINT((ndo, "%s", tstr)); 2385 return hdrlen; 2386 } 2387 break; 2388 case T_CTRL: 2389 if (!ctrl_body_print(ndo, fc, p - hdrlen)) { 2390 ND_PRINT((ndo, "%s", tstr)); 2391 return hdrlen; 2392 } 2393 break; 2394 case T_DATA: 2395 if (DATA_FRAME_IS_NULL(FC_SUBTYPE(fc))) 2396 return hdrlen; /* no-data frame */ 2397 /* There may be a problem w/ AP not having this bit set */ 2398 if (FC_WEP(fc)) { 2399 if (!wep_print(ndo, p)) { 2400 ND_PRINT((ndo, "%s", tstr)); 2401 return hdrlen; 2402 } 2403 } else if (llc_print(ndo, p, length, caplen, dst, src, 2404 &extracted_ethertype) == 0) { 2405 /* 2406 * Some kinds of LLC packet we cannot 2407 * handle intelligently 2408 */ 2409 if (!ndo->ndo_eflag) 2410 ieee_802_11_hdr_print(ndo, fc, p - hdrlen, hdrlen, 2411 meshdrlen, NULL, NULL); 2412 if (extracted_ethertype) 2413 ND_PRINT((ndo, "(LLC %s) ", 2414 etherproto_string( 2415 htons(extracted_ethertype)))); 2416 if (!ndo->ndo_suppress_default_print) 2417 ND_DEFAULTPRINT(p, caplen); 2418 } 2419 break; 2420 default: 2421 ND_PRINT((ndo, "unknown 802.11 frame type (%d)", FC_TYPE(fc))); 2422 break; 2423 } 2424 2425 return hdrlen; 2426 } 2427 2428 /* 2429 * This is the top level routine of the printer. 'p' points 2430 * to the 802.11 header of the packet, 'h->ts' is the timestamp, 2431 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 2432 * is the number of bytes actually captured. 2433 */ 2434 u_int 2435 ieee802_11_if_print(netdissect_options *ndo, 2436 const struct pcap_pkthdr *h, const u_char *p) 2437 { 2438 return ieee802_11_print(ndo, p, h->len, h->caplen, 0, 0); 2439 } 2440 2441 #define IEEE80211_CHAN_FHSS \ 2442 (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_GFSK) 2443 #define IEEE80211_CHAN_A \ 2444 (IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_OFDM) 2445 #define IEEE80211_CHAN_B \ 2446 (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_CCK) 2447 #define IEEE80211_CHAN_PUREG \ 2448 (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_OFDM) 2449 #define IEEE80211_CHAN_G \ 2450 (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_DYN) 2451 2452 #define IS_CHAN_FHSS(flags) \ 2453 ((flags & IEEE80211_CHAN_FHSS) == IEEE80211_CHAN_FHSS) 2454 #define IS_CHAN_A(flags) \ 2455 ((flags & IEEE80211_CHAN_A) == IEEE80211_CHAN_A) 2456 #define IS_CHAN_B(flags) \ 2457 ((flags & IEEE80211_CHAN_B) == IEEE80211_CHAN_B) 2458 #define IS_CHAN_PUREG(flags) \ 2459 ((flags & IEEE80211_CHAN_PUREG) == IEEE80211_CHAN_PUREG) 2460 #define IS_CHAN_G(flags) \ 2461 ((flags & IEEE80211_CHAN_G) == IEEE80211_CHAN_G) 2462 #define IS_CHAN_ANYG(flags) \ 2463 (IS_CHAN_PUREG(flags) || IS_CHAN_G(flags)) 2464 2465 static void 2466 print_chaninfo(netdissect_options *ndo, 2467 int freq, int flags) 2468 { 2469 ND_PRINT((ndo, "%u MHz", freq)); 2470 if (IS_CHAN_FHSS(flags)) 2471 ND_PRINT((ndo, " FHSS")); 2472 if (IS_CHAN_A(flags)) { 2473 if (flags & IEEE80211_CHAN_HALF) 2474 ND_PRINT((ndo, " 11a/10Mhz")); 2475 else if (flags & IEEE80211_CHAN_QUARTER) 2476 ND_PRINT((ndo, " 11a/5Mhz")); 2477 else 2478 ND_PRINT((ndo, " 11a")); 2479 } 2480 if (IS_CHAN_ANYG(flags)) { 2481 if (flags & IEEE80211_CHAN_HALF) 2482 ND_PRINT((ndo, " 11g/10Mhz")); 2483 else if (flags & IEEE80211_CHAN_QUARTER) 2484 ND_PRINT((ndo, " 11g/5Mhz")); 2485 else 2486 ND_PRINT((ndo, " 11g")); 2487 } else if (IS_CHAN_B(flags)) 2488 ND_PRINT((ndo, " 11b")); 2489 if (flags & IEEE80211_CHAN_TURBO) 2490 ND_PRINT((ndo, " Turbo")); 2491 if (flags & IEEE80211_CHAN_HT20) 2492 ND_PRINT((ndo, " ht/20")); 2493 else if (flags & IEEE80211_CHAN_HT40D) 2494 ND_PRINT((ndo, " ht/40-")); 2495 else if (flags & IEEE80211_CHAN_HT40U) 2496 ND_PRINT((ndo, " ht/40+")); 2497 ND_PRINT((ndo, " ")); 2498 } 2499 2500 static int 2501 print_radiotap_field(netdissect_options *ndo, 2502 struct cpack_state *s, uint32_t bit, uint8_t *flags, 2503 struct radiotap_state *state, uint32_t presentflags) 2504 { 2505 union { 2506 int8_t i8; 2507 uint8_t u8; 2508 int16_t i16; 2509 uint16_t u16; 2510 uint32_t u32; 2511 uint64_t u64; 2512 } u, u2, u3, u4; 2513 int rc; 2514 2515 switch (bit) { 2516 case IEEE80211_RADIOTAP_FLAGS: 2517 rc = cpack_uint8(s, &u.u8); 2518 if (rc != 0) 2519 break; 2520 *flags = u.u8; 2521 break; 2522 case IEEE80211_RADIOTAP_RATE: 2523 rc = cpack_uint8(s, &u.u8); 2524 if (rc != 0) 2525 break; 2526 2527 /* Save state rate */ 2528 state->rate = u.u8; 2529 break; 2530 case IEEE80211_RADIOTAP_DB_ANTSIGNAL: 2531 case IEEE80211_RADIOTAP_DB_ANTNOISE: 2532 case IEEE80211_RADIOTAP_ANTENNA: 2533 rc = cpack_uint8(s, &u.u8); 2534 break; 2535 case IEEE80211_RADIOTAP_DBM_ANTSIGNAL: 2536 case IEEE80211_RADIOTAP_DBM_ANTNOISE: 2537 rc = cpack_int8(s, &u.i8); 2538 break; 2539 case IEEE80211_RADIOTAP_CHANNEL: 2540 rc = cpack_uint16(s, &u.u16); 2541 if (rc != 0) 2542 break; 2543 rc = cpack_uint16(s, &u2.u16); 2544 break; 2545 case IEEE80211_RADIOTAP_FHSS: 2546 case IEEE80211_RADIOTAP_LOCK_QUALITY: 2547 case IEEE80211_RADIOTAP_TX_ATTENUATION: 2548 case IEEE80211_RADIOTAP_RX_FLAGS: 2549 rc = cpack_uint16(s, &u.u16); 2550 break; 2551 case IEEE80211_RADIOTAP_DB_TX_ATTENUATION: 2552 rc = cpack_uint8(s, &u.u8); 2553 break; 2554 case IEEE80211_RADIOTAP_DBM_TX_POWER: 2555 rc = cpack_int8(s, &u.i8); 2556 break; 2557 case IEEE80211_RADIOTAP_TSFT: 2558 rc = cpack_uint64(s, &u.u64); 2559 break; 2560 case IEEE80211_RADIOTAP_XCHANNEL: 2561 rc = cpack_uint32(s, &u.u32); 2562 if (rc != 0) 2563 break; 2564 rc = cpack_uint16(s, &u2.u16); 2565 if (rc != 0) 2566 break; 2567 rc = cpack_uint8(s, &u3.u8); 2568 if (rc != 0) 2569 break; 2570 rc = cpack_uint8(s, &u4.u8); 2571 break; 2572 case IEEE80211_RADIOTAP_MCS: 2573 rc = cpack_uint8(s, &u.u8); 2574 if (rc != 0) 2575 break; 2576 rc = cpack_uint8(s, &u2.u8); 2577 if (rc != 0) 2578 break; 2579 rc = cpack_uint8(s, &u3.u8); 2580 break; 2581 case IEEE80211_RADIOTAP_VENDOR_NAMESPACE: { 2582 uint8_t vns[3]; 2583 uint16_t length; 2584 uint8_t subspace; 2585 2586 if ((cpack_align_and_reserve(s, 2)) == NULL) { 2587 rc = -1; 2588 break; 2589 } 2590 2591 rc = cpack_uint8(s, &vns[0]); 2592 if (rc != 0) 2593 break; 2594 rc = cpack_uint8(s, &vns[1]); 2595 if (rc != 0) 2596 break; 2597 rc = cpack_uint8(s, &vns[2]); 2598 if (rc != 0) 2599 break; 2600 rc = cpack_uint8(s, &subspace); 2601 if (rc != 0) 2602 break; 2603 rc = cpack_uint16(s, &length); 2604 if (rc != 0) 2605 break; 2606 2607 /* Skip up to length */ 2608 s->c_next += length; 2609 break; 2610 } 2611 default: 2612 /* this bit indicates a field whose 2613 * size we do not know, so we cannot 2614 * proceed. Just print the bit number. 2615 */ 2616 ND_PRINT((ndo, "[bit %u] ", bit)); 2617 return -1; 2618 } 2619 2620 if (rc != 0) { 2621 ND_PRINT((ndo, "%s", tstr)); 2622 return rc; 2623 } 2624 2625 /* Preserve the state present flags */ 2626 state->present = presentflags; 2627 2628 switch (bit) { 2629 case IEEE80211_RADIOTAP_CHANNEL: 2630 /* 2631 * If CHANNEL and XCHANNEL are both present, skip 2632 * CHANNEL. 2633 */ 2634 if (presentflags & (1 << IEEE80211_RADIOTAP_XCHANNEL)) 2635 break; 2636 print_chaninfo(ndo, u.u16, u2.u16); 2637 break; 2638 case IEEE80211_RADIOTAP_FHSS: 2639 ND_PRINT((ndo, "fhset %d fhpat %d ", u.u16 & 0xff, (u.u16 >> 8) & 0xff)); 2640 break; 2641 case IEEE80211_RADIOTAP_RATE: 2642 /* 2643 * XXX On FreeBSD rate & 0x80 means we have an MCS. On 2644 * Linux and AirPcap it does not. (What about 2645 * Mac OS X, NetBSD, OpenBSD, and DragonFly BSD?) 2646 * 2647 * This is an issue either for proprietary extensions 2648 * to 11a or 11g, which do exist, or for 11n 2649 * implementations that stuff a rate value into 2650 * this field, which also appear to exist. 2651 * 2652 * We currently handle that by assuming that 2653 * if the 0x80 bit is set *and* the remaining 2654 * bits have a value between 0 and 15 it's 2655 * an MCS value, otherwise it's a rate. If 2656 * there are cases where systems that use 2657 * "0x80 + MCS index" for MCS indices > 15, 2658 * or stuff a rate value here between 64 and 2659 * 71.5 Mb/s in here, we'll need a preference 2660 * setting. Such rates do exist, e.g. 11n 2661 * MCS 7 at 20 MHz with a long guard interval. 2662 */ 2663 if (u.u8 >= 0x80 && u.u8 <= 0x8f) { 2664 /* 2665 * XXX - we don't know the channel width 2666 * or guard interval length, so we can't 2667 * convert this to a data rate. 2668 * 2669 * If you want us to show a data rate, 2670 * use the MCS field, not the Rate field; 2671 * the MCS field includes not only the 2672 * MCS index, it also includes bandwidth 2673 * and guard interval information. 2674 * 2675 * XXX - can we get the channel width 2676 * from XChannel and the guard interval 2677 * information from Flags, at least on 2678 * FreeBSD? 2679 */ 2680 ND_PRINT((ndo, "MCS %u ", u.u8 & 0x7f)); 2681 } else 2682 ND_PRINT((ndo, "%2.1f Mb/s ", .5 * u.u8)); 2683 break; 2684 case IEEE80211_RADIOTAP_DBM_ANTSIGNAL: 2685 ND_PRINT((ndo, "%ddB signal ", u.i8)); 2686 break; 2687 case IEEE80211_RADIOTAP_DBM_ANTNOISE: 2688 ND_PRINT((ndo, "%ddB noise ", u.i8)); 2689 break; 2690 case IEEE80211_RADIOTAP_DB_ANTSIGNAL: 2691 ND_PRINT((ndo, "%ddB signal ", u.u8)); 2692 break; 2693 case IEEE80211_RADIOTAP_DB_ANTNOISE: 2694 ND_PRINT((ndo, "%ddB noise ", u.u8)); 2695 break; 2696 case IEEE80211_RADIOTAP_LOCK_QUALITY: 2697 ND_PRINT((ndo, "%u sq ", u.u16)); 2698 break; 2699 case IEEE80211_RADIOTAP_TX_ATTENUATION: 2700 ND_PRINT((ndo, "%d tx power ", -(int)u.u16)); 2701 break; 2702 case IEEE80211_RADIOTAP_DB_TX_ATTENUATION: 2703 ND_PRINT((ndo, "%ddB tx power ", -(int)u.u8)); 2704 break; 2705 case IEEE80211_RADIOTAP_DBM_TX_POWER: 2706 ND_PRINT((ndo, "%ddBm tx power ", u.i8)); 2707 break; 2708 case IEEE80211_RADIOTAP_FLAGS: 2709 if (u.u8 & IEEE80211_RADIOTAP_F_CFP) 2710 ND_PRINT((ndo, "cfp ")); 2711 if (u.u8 & IEEE80211_RADIOTAP_F_SHORTPRE) 2712 ND_PRINT((ndo, "short preamble ")); 2713 if (u.u8 & IEEE80211_RADIOTAP_F_WEP) 2714 ND_PRINT((ndo, "wep ")); 2715 if (u.u8 & IEEE80211_RADIOTAP_F_FRAG) 2716 ND_PRINT((ndo, "fragmented ")); 2717 if (u.u8 & IEEE80211_RADIOTAP_F_BADFCS) 2718 ND_PRINT((ndo, "bad-fcs ")); 2719 break; 2720 case IEEE80211_RADIOTAP_ANTENNA: 2721 ND_PRINT((ndo, "antenna %d ", u.u8)); 2722 break; 2723 case IEEE80211_RADIOTAP_TSFT: 2724 ND_PRINT((ndo, "%" PRIu64 "us tsft ", u.u64)); 2725 break; 2726 case IEEE80211_RADIOTAP_RX_FLAGS: 2727 /* Do nothing for now */ 2728 break; 2729 case IEEE80211_RADIOTAP_XCHANNEL: 2730 print_chaninfo(ndo, u2.u16, u.u32); 2731 break; 2732 case IEEE80211_RADIOTAP_MCS: { 2733 static const char *bandwidth[4] = { 2734 "20 MHz", 2735 "40 MHz", 2736 "20 MHz (L)", 2737 "20 MHz (U)" 2738 }; 2739 float htrate; 2740 2741 if (u.u8 & IEEE80211_RADIOTAP_MCS_MCS_INDEX_KNOWN) { 2742 /* 2743 * We know the MCS index. 2744 */ 2745 if (u3.u8 <= MAX_MCS_INDEX) { 2746 /* 2747 * And it's in-range. 2748 */ 2749 if (u.u8 & (IEEE80211_RADIOTAP_MCS_BANDWIDTH_KNOWN|IEEE80211_RADIOTAP_MCS_GUARD_INTERVAL_KNOWN)) { 2750 /* 2751 * And we know both the bandwidth and 2752 * the guard interval, so we can look 2753 * up the rate. 2754 */ 2755 htrate = 2756 ieee80211_float_htrates \ 2757 [u3.u8] \ 2758 [((u2.u8 & IEEE80211_RADIOTAP_MCS_BANDWIDTH_MASK) == IEEE80211_RADIOTAP_MCS_BANDWIDTH_40 ? 1 : 0)] \ 2759 [((u2.u8 & IEEE80211_RADIOTAP_MCS_SHORT_GI) ? 1 : 0)]; 2760 } else { 2761 /* 2762 * We don't know both the bandwidth 2763 * and the guard interval, so we can 2764 * only report the MCS index. 2765 */ 2766 htrate = 0.0; 2767 } 2768 } else { 2769 /* 2770 * The MCS value is out of range. 2771 */ 2772 htrate = 0.0; 2773 } 2774 if (htrate != 0.0) { 2775 /* 2776 * We have the rate. 2777 * Print it. 2778 */ 2779 ND_PRINT((ndo, "%.1f Mb/s MCS %u ", htrate, u3.u8)); 2780 } else { 2781 /* 2782 * We at least have the MCS index. 2783 * Print it. 2784 */ 2785 ND_PRINT((ndo, "MCS %u ", u3.u8)); 2786 } 2787 } 2788 if (u.u8 & IEEE80211_RADIOTAP_MCS_BANDWIDTH_KNOWN) { 2789 ND_PRINT((ndo, "%s ", 2790 bandwidth[u2.u8 & IEEE80211_RADIOTAP_MCS_BANDWIDTH_MASK])); 2791 } 2792 if (u.u8 & IEEE80211_RADIOTAP_MCS_GUARD_INTERVAL_KNOWN) { 2793 ND_PRINT((ndo, "%s GI ", 2794 (u2.u8 & IEEE80211_RADIOTAP_MCS_SHORT_GI) ? 2795 "short" : "lon")); 2796 } 2797 if (u.u8 & IEEE80211_RADIOTAP_MCS_HT_FORMAT_KNOWN) { 2798 ND_PRINT((ndo, "%s ", 2799 (u2.u8 & IEEE80211_RADIOTAP_MCS_HT_GREENFIELD) ? 2800 "greenfield" : "mixed")); 2801 } 2802 if (u.u8 & IEEE80211_RADIOTAP_MCS_FEC_TYPE_KNOWN) { 2803 ND_PRINT((ndo, "%s FEC ", 2804 (u2.u8 & IEEE80211_RADIOTAP_MCS_FEC_LDPC) ? 2805 "LDPC" : "BCC")); 2806 } 2807 if (u.u8 & IEEE80211_RADIOTAP_MCS_STBC_KNOWN) { 2808 ND_PRINT((ndo, "RX-STBC%u ", 2809 (u2.u8 & IEEE80211_RADIOTAP_MCS_STBC_MASK) >> IEEE80211_RADIOTAP_MCS_STBC_SHIFT)); 2810 } 2811 2812 break; 2813 } 2814 } 2815 return 0; 2816 } 2817 2818 static u_int 2819 ieee802_11_radio_print(netdissect_options *ndo, 2820 const u_char *p, u_int length, u_int caplen) 2821 { 2822 #define BITNO_32(x) (((x) >> 16) ? 16 + BITNO_16((x) >> 16) : BITNO_16((x))) 2823 #define BITNO_16(x) (((x) >> 8) ? 8 + BITNO_8((x) >> 8) : BITNO_8((x))) 2824 #define BITNO_8(x) (((x) >> 4) ? 4 + BITNO_4((x) >> 4) : BITNO_4((x))) 2825 #define BITNO_4(x) (((x) >> 2) ? 2 + BITNO_2((x) >> 2) : BITNO_2((x))) 2826 #define BITNO_2(x) (((x) & 2) ? 1 : 0) 2827 #define BIT(n) (1U << n) 2828 #define IS_EXTENDED(__p) \ 2829 (EXTRACT_LE_32BITS(__p) & BIT(IEEE80211_RADIOTAP_EXT)) != 0 2830 2831 struct cpack_state cpacker; 2832 struct ieee80211_radiotap_header *hdr; 2833 uint32_t present, next_present; 2834 uint32_t presentflags = 0; 2835 uint32_t *presentp, *last_presentp; 2836 enum ieee80211_radiotap_type bit; 2837 int bit0; 2838 u_int len; 2839 uint8_t flags; 2840 int pad; 2841 u_int fcslen; 2842 struct radiotap_state state; 2843 2844 if (caplen < sizeof(*hdr)) { 2845 ND_PRINT((ndo, "%s", tstr)); 2846 return caplen; 2847 } 2848 2849 hdr = (struct ieee80211_radiotap_header *)p; 2850 2851 len = EXTRACT_LE_16BITS(&hdr->it_len); 2852 2853 if (caplen < len) { 2854 ND_PRINT((ndo, "%s", tstr)); 2855 return caplen; 2856 } 2857 cpack_init(&cpacker, (uint8_t *)hdr, len); /* align against header start */ 2858 cpack_advance(&cpacker, sizeof(*hdr)); /* includes the 1st bitmap */ 2859 for (last_presentp = &hdr->it_present; 2860 IS_EXTENDED(last_presentp) && 2861 (u_char*)(last_presentp + 1) <= p + len; 2862 last_presentp++) 2863 cpack_advance(&cpacker, sizeof(hdr->it_present)); /* more bitmaps */ 2864 2865 /* are there more bitmap extensions than bytes in header? */ 2866 if (IS_EXTENDED(last_presentp)) { 2867 ND_PRINT((ndo, "%s", tstr)); 2868 return caplen; 2869 } 2870 2871 /* Assume no flags */ 2872 flags = 0; 2873 /* Assume no Atheros padding between 802.11 header and body */ 2874 pad = 0; 2875 /* Assume no FCS at end of frame */ 2876 fcslen = 0; 2877 for (bit0 = 0, presentp = &hdr->it_present; presentp <= last_presentp; 2878 presentp++, bit0 += 32) { 2879 presentflags = EXTRACT_LE_32BITS(presentp); 2880 2881 /* Clear state. */ 2882 memset(&state, 0, sizeof(state)); 2883 2884 for (present = EXTRACT_LE_32BITS(presentp); present; 2885 present = next_present) { 2886 /* clear the least significant bit that is set */ 2887 next_present = present & (present - 1); 2888 2889 /* extract the least significant bit that is set */ 2890 bit = (enum ieee80211_radiotap_type) 2891 (bit0 + BITNO_32(present ^ next_present)); 2892 2893 if (print_radiotap_field(ndo, &cpacker, bit, &flags, &state, presentflags) != 0) 2894 goto out; 2895 } 2896 } 2897 2898 out: 2899 if (flags & IEEE80211_RADIOTAP_F_DATAPAD) 2900 pad = 1; /* Atheros padding */ 2901 if (flags & IEEE80211_RADIOTAP_F_FCS) 2902 fcslen = 4; /* FCS at end of packet */ 2903 return len + ieee802_11_print(ndo, p + len, length - len, caplen - len, pad, 2904 fcslen); 2905 #undef BITNO_32 2906 #undef BITNO_16 2907 #undef BITNO_8 2908 #undef BITNO_4 2909 #undef BITNO_2 2910 #undef BIT 2911 } 2912 2913 static u_int 2914 ieee802_11_avs_radio_print(netdissect_options *ndo, 2915 const u_char *p, u_int length, u_int caplen) 2916 { 2917 uint32_t caphdr_len; 2918 2919 if (caplen < 8) { 2920 ND_PRINT((ndo, "%s", tstr)); 2921 return caplen; 2922 } 2923 2924 caphdr_len = EXTRACT_32BITS(p + 4); 2925 if (caphdr_len < 8) { 2926 /* 2927 * Yow! The capture header length is claimed not 2928 * to be large enough to include even the version 2929 * cookie or capture header length! 2930 */ 2931 ND_PRINT((ndo, "%s", tstr)); 2932 return caplen; 2933 } 2934 2935 if (caplen < caphdr_len) { 2936 ND_PRINT((ndo, "%s", tstr)); 2937 return caplen; 2938 } 2939 2940 return caphdr_len + ieee802_11_print(ndo, p + caphdr_len, 2941 length - caphdr_len, caplen - caphdr_len, 0, 0); 2942 } 2943 2944 #define PRISM_HDR_LEN 144 2945 2946 #define WLANCAP_MAGIC_COOKIE_BASE 0x80211000 2947 #define WLANCAP_MAGIC_COOKIE_V1 0x80211001 2948 #define WLANCAP_MAGIC_COOKIE_V2 0x80211002 2949 2950 /* 2951 * For DLT_PRISM_HEADER; like DLT_IEEE802_11, but with an extra header, 2952 * containing information such as radio information, which we 2953 * currently ignore. 2954 * 2955 * If, however, the packet begins with WLANCAP_MAGIC_COOKIE_V1 or 2956 * WLANCAP_MAGIC_COOKIE_V2, it's really DLT_IEEE802_11_RADIO_AVS 2957 * (currently, on Linux, there's no ARPHRD_ type for 2958 * DLT_IEEE802_11_RADIO_AVS, as there is a ARPHRD_IEEE80211_PRISM 2959 * for DLT_PRISM_HEADER, so ARPHRD_IEEE80211_PRISM is used for 2960 * the AVS header, and the first 4 bytes of the header are used to 2961 * indicate whether it's a Prism header or an AVS header). 2962 */ 2963 u_int 2964 prism_if_print(netdissect_options *ndo, 2965 const struct pcap_pkthdr *h, const u_char *p) 2966 { 2967 u_int caplen = h->caplen; 2968 u_int length = h->len; 2969 uint32_t msgcode; 2970 2971 if (caplen < 4) { 2972 ND_PRINT((ndo, "%s", tstr)); 2973 return caplen; 2974 } 2975 2976 msgcode = EXTRACT_32BITS(p); 2977 if (msgcode == WLANCAP_MAGIC_COOKIE_V1 || 2978 msgcode == WLANCAP_MAGIC_COOKIE_V2) 2979 return ieee802_11_avs_radio_print(ndo, p, length, caplen); 2980 2981 if (caplen < PRISM_HDR_LEN) { 2982 ND_PRINT((ndo, "%s", tstr)); 2983 return caplen; 2984 } 2985 2986 return PRISM_HDR_LEN + ieee802_11_print(ndo, p + PRISM_HDR_LEN, 2987 length - PRISM_HDR_LEN, caplen - PRISM_HDR_LEN, 0, 0); 2988 } 2989 2990 /* 2991 * For DLT_IEEE802_11_RADIO; like DLT_IEEE802_11, but with an extra 2992 * header, containing information such as radio information. 2993 */ 2994 u_int 2995 ieee802_11_radio_if_print(netdissect_options *ndo, 2996 const struct pcap_pkthdr *h, const u_char *p) 2997 { 2998 return ieee802_11_radio_print(ndo, p, h->len, h->caplen); 2999 } 3000 3001 /* 3002 * For DLT_IEEE802_11_RADIO_AVS; like DLT_IEEE802_11, but with an 3003 * extra header, containing information such as radio information, 3004 * which we currently ignore. 3005 */ 3006 u_int 3007 ieee802_11_radio_avs_if_print(netdissect_options *ndo, 3008 const struct pcap_pkthdr *h, const u_char *p) 3009 { 3010 return ieee802_11_avs_radio_print(ndo, p, h->len, h->caplen); 3011 } 3012
