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Diffstat (limited to 'print-802_11.c')
| -rw-r--r-- | print-802_11.c | 3533 |
1 files changed, 3533 insertions, 0 deletions
diff --git a/print-802_11.c b/print-802_11.c new file mode 100644 index 0000000..62cc9a5 --- /dev/null +++ b/print-802_11.c @@ -0,0 +1,3533 @@ +/* + * Copyright (c) 2001 + * Fortress Technologies, Inc. All rights reserved. + * Charlie Lenahan (clenahan@fortresstech.com) + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that: (1) source code distributions + * retain the above copyright notice and this paragraph in its entirety, (2) + * distributions including binary code include the above copyright notice and + * this paragraph in its entirety in the documentation or other materials + * provided with the distribution, and (3) all advertising materials mentioning + * features or use of this software display the following acknowledgement: + * ``This product includes software developed by the University of California, + * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of + * the University nor the names of its contributors may be used to endorse + * or promote products derived from this software without specific prior + * written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + +/* \summary: IEEE 802.11 printer */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "netdissect-stdinc.h" + +#include <string.h> + +#include "netdissect.h" +#include "addrtoname.h" + +#include "extract.h" + +#include "cpack.h" + + +/* Lengths of 802.11 header components. */ +#define IEEE802_11_FC_LEN 2 +#define IEEE802_11_DUR_LEN 2 +#define IEEE802_11_DA_LEN 6 +#define IEEE802_11_SA_LEN 6 +#define IEEE802_11_BSSID_LEN 6 +#define IEEE802_11_RA_LEN 6 +#define IEEE802_11_TA_LEN 6 +#define IEEE802_11_ADDR1_LEN 6 +#define IEEE802_11_SEQ_LEN 2 +#define IEEE802_11_CTL_LEN 2 +#define IEEE802_11_CARRIED_FC_LEN 2 +#define IEEE802_11_HT_CONTROL_LEN 4 +#define IEEE802_11_IV_LEN 3 +#define IEEE802_11_KID_LEN 1 + +/* Frame check sequence length. */ +#define IEEE802_11_FCS_LEN 4 + +/* Lengths of beacon components. */ +#define IEEE802_11_TSTAMP_LEN 8 +#define IEEE802_11_BCNINT_LEN 2 +#define IEEE802_11_CAPINFO_LEN 2 +#define IEEE802_11_LISTENINT_LEN 2 + +#define IEEE802_11_AID_LEN 2 +#define IEEE802_11_STATUS_LEN 2 +#define IEEE802_11_REASON_LEN 2 + +/* Length of previous AP in reassocation frame */ +#define IEEE802_11_AP_LEN 6 + +#define T_MGMT 0x0 /* management */ +#define T_CTRL 0x1 /* control */ +#define T_DATA 0x2 /* data */ +#define T_RESV 0x3 /* reserved */ + +#define ST_ASSOC_REQUEST 0x0 +#define ST_ASSOC_RESPONSE 0x1 +#define ST_REASSOC_REQUEST 0x2 +#define ST_REASSOC_RESPONSE 0x3 +#define ST_PROBE_REQUEST 0x4 +#define ST_PROBE_RESPONSE 0x5 +/* RESERVED 0x6 */ +/* RESERVED 0x7 */ +#define ST_BEACON 0x8 +#define ST_ATIM 0x9 +#define ST_DISASSOC 0xA +#define ST_AUTH 0xB +#define ST_DEAUTH 0xC +#define ST_ACTION 0xD +/* RESERVED 0xE */ +/* RESERVED 0xF */ + +static const struct tok st_str[] = { + { ST_ASSOC_REQUEST, "Assoc Request" }, + { ST_ASSOC_RESPONSE, "Assoc Response" }, + { ST_REASSOC_REQUEST, "ReAssoc Request" }, + { ST_REASSOC_RESPONSE, "ReAssoc Response" }, + { ST_PROBE_REQUEST, "Probe Request" }, + { ST_PROBE_RESPONSE, "Probe Response" }, + { ST_BEACON, "Beacon" }, + { ST_ATIM, "ATIM" }, + { ST_DISASSOC, "Disassociation" }, + { ST_AUTH, "Authentication" }, + { ST_DEAUTH, "DeAuthentication" }, + { ST_ACTION, "Action" }, + { 0, NULL } +}; + +#define CTRL_CONTROL_WRAPPER 0x7 +#define CTRL_BAR 0x8 +#define CTRL_BA 0x9 +#define CTRL_PS_POLL 0xA +#define CTRL_RTS 0xB +#define CTRL_CTS 0xC +#define CTRL_ACK 0xD +#define CTRL_CF_END 0xE +#define CTRL_END_ACK 0xF + +static const struct tok ctrl_str[] = { + { CTRL_CONTROL_WRAPPER, "Control Wrapper" }, + { CTRL_BAR, "BAR" }, + { CTRL_BA, "BA" }, + { CTRL_PS_POLL, "Power Save-Poll" }, + { CTRL_RTS, "Request-To-Send" }, + { CTRL_CTS, "Clear-To-Send" }, + { CTRL_ACK, "Acknowledgment" }, + { CTRL_CF_END, "CF-End" }, + { CTRL_END_ACK, "CF-End+CF-Ack" }, + { 0, NULL } +}; + +#define DATA_DATA 0x0 +#define DATA_DATA_CF_ACK 0x1 +#define DATA_DATA_CF_POLL 0x2 +#define DATA_DATA_CF_ACK_POLL 0x3 +#define DATA_NODATA 0x4 +#define DATA_NODATA_CF_ACK 0x5 +#define DATA_NODATA_CF_POLL 0x6 +#define DATA_NODATA_CF_ACK_POLL 0x7 + +#define DATA_QOS_DATA 0x8 +#define DATA_QOS_DATA_CF_ACK 0x9 +#define DATA_QOS_DATA_CF_POLL 0xA +#define DATA_QOS_DATA_CF_ACK_POLL 0xB +#define DATA_QOS_NODATA 0xC +#define DATA_QOS_CF_POLL_NODATA 0xE +#define DATA_QOS_CF_ACK_POLL_NODATA 0xF + +/* + * The subtype field of a data frame is, in effect, composed of 4 flag + * bits - CF-Ack, CF-Poll, Null (means the frame doesn't actually have + * any data), and QoS. + */ +#define DATA_FRAME_IS_CF_ACK(x) ((x) & 0x01) +#define DATA_FRAME_IS_CF_POLL(x) ((x) & 0x02) +#define DATA_FRAME_IS_NULL(x) ((x) & 0x04) +#define DATA_FRAME_IS_QOS(x) ((x) & 0x08) + +/* + * Bits in the frame control field. + */ +#define FC_VERSION(fc) ((fc) & 0x3) +#define FC_TYPE(fc) (((fc) >> 2) & 0x3) +#define FC_SUBTYPE(fc) (((fc) >> 4) & 0xF) +#define FC_TO_DS(fc) ((fc) & 0x0100) +#define FC_FROM_DS(fc) ((fc) & 0x0200) +#define FC_MORE_FLAG(fc) ((fc) & 0x0400) +#define FC_RETRY(fc) ((fc) & 0x0800) +#define FC_POWER_MGMT(fc) ((fc) & 0x1000) +#define FC_MORE_DATA(fc) ((fc) & 0x2000) +#define FC_PROTECTED(fc) ((fc) & 0x4000) +#define FC_ORDER(fc) ((fc) & 0x8000) + +struct mgmt_header_t { + nd_uint16_t fc; + nd_uint16_t duration; + nd_mac_addr da; + nd_mac_addr sa; + nd_mac_addr bssid; + nd_uint16_t seq_ctrl; +}; + +#define MGMT_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\ + IEEE802_11_DA_LEN+IEEE802_11_SA_LEN+\ + IEEE802_11_BSSID_LEN+IEEE802_11_SEQ_LEN) + +#define CAPABILITY_ESS(cap) ((cap) & 0x0001) +#define CAPABILITY_IBSS(cap) ((cap) & 0x0002) +#define CAPABILITY_CFP(cap) ((cap) & 0x0004) +#define CAPABILITY_CFP_REQ(cap) ((cap) & 0x0008) +#define CAPABILITY_PRIVACY(cap) ((cap) & 0x0010) + +struct ssid_t { + uint8_t element_id; + uint8_t length; + u_char ssid[33]; /* 32 + 1 for null */ +}; + +struct rates_t { + uint8_t element_id; + uint8_t length; + uint8_t rate[16]; +}; + +struct challenge_t { + uint8_t element_id; + uint8_t length; + uint8_t text[254]; /* 1-253 + 1 for null */ +}; + +struct fh_t { + uint8_t element_id; + uint8_t length; + uint16_t dwell_time; + uint8_t hop_set; + uint8_t hop_pattern; + uint8_t hop_index; +}; + +struct ds_t { + uint8_t element_id; + uint8_t length; + uint8_t channel; +}; + +struct cf_t { + uint8_t element_id; + uint8_t length; + uint8_t count; + uint8_t period; + uint16_t max_duration; + uint16_t dur_remaining; +}; + +struct tim_t { + uint8_t element_id; + uint8_t length; + uint8_t count; + uint8_t period; + uint8_t bitmap_control; + uint8_t bitmap[251]; +}; + +#define E_SSID 0 +#define E_RATES 1 +#define E_FH 2 +#define E_DS 3 +#define E_CF 4 +#define E_TIM 5 +#define E_IBSS 6 +/* reserved 7 */ +/* reserved 8 */ +/* reserved 9 */ +/* reserved 10 */ +/* reserved 11 */ +/* reserved 12 */ +/* reserved 13 */ +/* reserved 14 */ +/* reserved 15 */ +/* reserved 16 */ + +#define E_CHALLENGE 16 +/* reserved 17 */ +/* reserved 18 */ +/* reserved 19 */ +/* reserved 16 */ +/* reserved 16 */ + + +struct mgmt_body_t { + uint8_t timestamp[IEEE802_11_TSTAMP_LEN]; + uint16_t beacon_interval; + uint16_t listen_interval; + uint16_t status_code; + uint16_t aid; + u_char ap[IEEE802_11_AP_LEN]; + uint16_t reason_code; + uint16_t auth_alg; + uint16_t auth_trans_seq_num; + int challenge_present; + struct challenge_t challenge; + uint16_t capability_info; + int ssid_present; + struct ssid_t ssid; + int rates_present; + struct rates_t rates; + int ds_present; + struct ds_t ds; + int cf_present; + struct cf_t cf; + int fh_present; + struct fh_t fh; + int tim_present; + struct tim_t tim; +}; + +struct ctrl_control_wrapper_hdr_t { + nd_uint16_t fc; + nd_uint16_t duration; + nd_mac_addr addr1; + nd_uint16_t carried_fc[IEEE802_11_CARRIED_FC_LEN]; + nd_uint16_t ht_control[IEEE802_11_HT_CONTROL_LEN]; +}; + +#define CTRL_CONTROL_WRAPPER_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\ + IEEE802_11_ADDR1_LEN+\ + IEEE802_11_CARRIED_FC_LEN+\ + IEEE802_11_HT_CONTROL_LEN) + +struct ctrl_rts_hdr_t { + nd_uint16_t fc; + nd_uint16_t duration; + nd_mac_addr ra; + nd_mac_addr ta; +}; + +#define CTRL_RTS_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\ + IEEE802_11_RA_LEN+IEEE802_11_TA_LEN) + +struct ctrl_cts_hdr_t { + nd_uint16_t fc; + nd_uint16_t duration; + nd_mac_addr ra; +}; + +#define CTRL_CTS_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+IEEE802_11_RA_LEN) + +struct ctrl_ack_hdr_t { + nd_uint16_t fc; + nd_uint16_t duration; + nd_mac_addr ra; +}; + +#define CTRL_ACK_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+IEEE802_11_RA_LEN) + +struct ctrl_ps_poll_hdr_t { + nd_uint16_t fc; + nd_uint16_t aid; + nd_mac_addr bssid; + nd_mac_addr ta; +}; + +#define CTRL_PS_POLL_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_AID_LEN+\ + IEEE802_11_BSSID_LEN+IEEE802_11_TA_LEN) + +struct ctrl_end_hdr_t { + nd_uint16_t fc; + nd_uint16_t duration; + nd_mac_addr ra; + nd_mac_addr bssid; +}; + +#define CTRL_END_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\ + IEEE802_11_RA_LEN+IEEE802_11_BSSID_LEN) + +struct ctrl_end_ack_hdr_t { + nd_uint16_t fc; + nd_uint16_t duration; + nd_mac_addr ra; + nd_mac_addr bssid; +}; + +#define CTRL_END_ACK_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\ + IEEE802_11_RA_LEN+IEEE802_11_BSSID_LEN) + +struct ctrl_ba_hdr_t { + nd_uint16_t fc; + nd_uint16_t duration; + nd_mac_addr ra; +}; + +#define CTRL_BA_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+IEEE802_11_RA_LEN) + +struct ctrl_bar_hdr_t { + nd_uint16_t fc; + nd_uint16_t dur; + nd_mac_addr ra; + nd_mac_addr ta; + nd_uint16_t ctl; + nd_uint16_t seq; +}; + +#define CTRL_BAR_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\ + IEEE802_11_RA_LEN+IEEE802_11_TA_LEN+\ + IEEE802_11_CTL_LEN+IEEE802_11_SEQ_LEN) + +struct meshcntl_t { + nd_uint8_t flags; + nd_uint8_t ttl; + nd_uint32_t seq; + nd_mac_addr addr4; + nd_mac_addr addr5; + nd_mac_addr addr6; +}; + +#define IV_IV(iv) ((iv) & 0xFFFFFF) +#define IV_PAD(iv) (((iv) >> 24) & 0x3F) +#define IV_KEYID(iv) (((iv) >> 30) & 0x03) + +#define PRINT_SSID(p) \ + if (p.ssid_present) { \ + ND_PRINT(" ("); \ + fn_print_str(ndo, p.ssid.ssid); \ + ND_PRINT(")"); \ + } + +#define PRINT_RATE(_sep, _r, _suf) \ + ND_PRINT("%s%2.1f%s", _sep, (.5 * ((_r) & 0x7f)), _suf) +#define PRINT_RATES(p) \ + if (p.rates_present) { \ + int z; \ + const char *sep = " ["; \ + for (z = 0; z < p.rates.length ; z++) { \ + PRINT_RATE(sep, p.rates.rate[z], \ + (p.rates.rate[z] & 0x80 ? "*" : "")); \ + sep = " "; \ + } \ + if (p.rates.length != 0) \ + ND_PRINT(" Mbit]"); \ + } + +#define PRINT_DS_CHANNEL(p) \ + if (p.ds_present) \ + ND_PRINT(" CH: %u", p.ds.channel); \ + ND_PRINT("%s", \ + CAPABILITY_PRIVACY(p.capability_info) ? ", PRIVACY" : ""); + +#define MAX_MCS_INDEX 76 + +/* + * Indices are: + * + * the MCS index (0-76); + * + * 0 for 20 MHz, 1 for 40 MHz; + * + * 0 for a long guard interval, 1 for a short guard interval. + */ +static const float ieee80211_float_htrates[MAX_MCS_INDEX+1][2][2] = { + /* MCS 0 */ + { /* 20 Mhz */ { 6.5f, /* SGI */ 7.2f, }, + /* 40 Mhz */ { 13.5f, /* SGI */ 15.0f, }, + }, + + /* MCS 1 */ + { /* 20 Mhz */ { 13.0f, /* SGI */ 14.4f, }, + /* 40 Mhz */ { 27.0f, /* SGI */ 30.0f, }, + }, + + /* MCS 2 */ + { /* 20 Mhz */ { 19.5f, /* SGI */ 21.7f, }, + /* 40 Mhz */ { 40.5f, /* SGI */ 45.0f, }, + }, + + /* MCS 3 */ + { /* 20 Mhz */ { 26.0f, /* SGI */ 28.9f, }, + /* 40 Mhz */ { 54.0f, /* SGI */ 60.0f, }, + }, + + /* MCS 4 */ + { /* 20 Mhz */ { 39.0f, /* SGI */ 43.3f, }, + /* 40 Mhz */ { 81.0f, /* SGI */ 90.0f, }, + }, + + /* MCS 5 */ + { /* 20 Mhz */ { 52.0f, /* SGI */ 57.8f, }, + /* 40 Mhz */ { 108.0f, /* SGI */ 120.0f, }, + }, + + /* MCS 6 */ + { /* 20 Mhz */ { 58.5f, /* SGI */ 65.0f, }, + /* 40 Mhz */ { 121.5f, /* SGI */ 135.0f, }, + }, + + /* MCS 7 */ + { /* 20 Mhz */ { 65.0f, /* SGI */ 72.2f, }, + /* 40 Mhz */ { 135.0f, /* SGI */ 150.0f, }, + }, + + /* MCS 8 */ + { /* 20 Mhz */ { 13.0f, /* SGI */ 14.4f, }, + /* 40 Mhz */ { 27.0f, /* SGI */ 30.0f, }, + }, + + /* MCS 9 */ + { /* 20 Mhz */ { 26.0f, /* SGI */ 28.9f, }, + /* 40 Mhz */ { 54.0f, /* SGI */ 60.0f, }, + }, + + /* MCS 10 */ + { /* 20 Mhz */ { 39.0f, /* SGI */ 43.3f, }, + /* 40 Mhz */ { 81.0f, /* SGI */ 90.0f, }, + }, + + /* MCS 11 */ + { /* 20 Mhz */ { 52.0f, /* SGI */ 57.8f, }, + /* 40 Mhz */ { 108.0f, /* SGI */ 120.0f, }, + }, + + /* MCS 12 */ + { /* 20 Mhz */ { 78.0f, /* SGI */ 86.7f, }, + /* 40 Mhz */ { 162.0f, /* SGI */ 180.0f, }, + }, + + /* MCS 13 */ + { /* 20 Mhz */ { 104.0f, /* SGI */ 115.6f, }, + /* 40 Mhz */ { 216.0f, /* SGI */ 240.0f, }, + }, + + /* MCS 14 */ + { /* 20 Mhz */ { 117.0f, /* SGI */ 130.0f, }, + /* 40 Mhz */ { 243.0f, /* SGI */ 270.0f, }, + }, + + /* MCS 15 */ + { /* 20 Mhz */ { 130.0f, /* SGI */ 144.4f, }, + /* 40 Mhz */ { 270.0f, /* SGI */ 300.0f, }, + }, + + /* MCS 16 */ + { /* 20 Mhz */ { 19.5f, /* SGI */ 21.7f, }, + /* 40 Mhz */ { 40.5f, /* SGI */ 45.0f, }, + }, + + /* MCS 17 */ + { /* 20 Mhz */ { 39.0f, /* SGI */ 43.3f, }, + /* 40 Mhz */ { 81.0f, /* SGI */ 90.0f, }, + }, + + /* MCS 18 */ + { /* 20 Mhz */ { 58.5f, /* SGI */ 65.0f, }, + /* 40 Mhz */ { 121.5f, /* SGI */ 135.0f, }, + }, + + /* MCS 19 */ + { /* 20 Mhz */ { 78.0f, /* SGI */ 86.7f, }, + /* 40 Mhz */ { 162.0f, /* SGI */ 180.0f, }, + }, + + /* MCS 20 */ + { /* 20 Mhz */ { 117.0f, /* SGI */ 130.0f, }, + /* 40 Mhz */ { 243.0f, /* SGI */ 270.0f, }, + }, + + /* MCS 21 */ + { /* 20 Mhz */ { 156.0f, /* SGI */ 173.3f, }, + /* 40 Mhz */ { 324.0f, /* SGI */ 360.0f, }, + }, + + /* MCS 22 */ + { /* 20 Mhz */ { 175.5f, /* SGI */ 195.0f, }, + /* 40 Mhz */ { 364.5f, /* SGI */ 405.0f, }, + }, + + /* MCS 23 */ + { /* 20 Mhz */ { 195.0f, /* SGI */ 216.7f, }, + /* 40 Mhz */ { 405.0f, /* SGI */ 450.0f, }, + }, + + /* MCS 24 */ + { /* 20 Mhz */ { 26.0f, /* SGI */ 28.9f, }, + /* 40 Mhz */ { 54.0f, /* SGI */ 60.0f, }, + }, + + /* MCS 25 */ + { /* 20 Mhz */ { 52.0f, /* SGI */ 57.8f, }, + /* 40 Mhz */ { 108.0f, /* SGI */ 120.0f, }, + }, + + /* MCS 26 */ + { /* 20 Mhz */ { 78.0f, /* SGI */ 86.7f, }, + /* 40 Mhz */ { 162.0f, /* SGI */ 180.0f, }, + }, + + /* MCS 27 */ + { /* 20 Mhz */ { 104.0f, /* SGI */ 115.6f, }, + /* 40 Mhz */ { 216.0f, /* SGI */ 240.0f, }, + }, + + /* MCS 28 */ + { /* 20 Mhz */ { 156.0f, /* SGI */ 173.3f, }, + /* 40 Mhz */ { 324.0f, /* SGI */ 360.0f, }, + }, + + /* MCS 29 */ + { /* 20 Mhz */ { 208.0f, /* SGI */ 231.1f, }, + /* 40 Mhz */ { 432.0f, /* SGI */ 480.0f, }, + }, + + /* MCS 30 */ + { /* 20 Mhz */ { 234.0f, /* SGI */ 260.0f, }, + /* 40 Mhz */ { 486.0f, /* SGI */ 540.0f, }, + }, + + /* MCS 31 */ + { /* 20 Mhz */ { 260.0f, /* SGI */ 288.9f, }, + /* 40 Mhz */ { 540.0f, /* SGI */ 600.0f, }, + }, + + /* MCS 32 */ + { /* 20 Mhz */ { 0.0f, /* SGI */ 0.0f, }, /* not valid */ + /* 40 Mhz */ { 6.0f, /* SGI */ 6.7f, }, + }, + + /* MCS 33 */ + { /* 20 Mhz */ { 39.0f, /* SGI */ 43.3f, }, + /* 40 Mhz */ { 81.0f, /* SGI */ 90.0f, }, + }, + + /* MCS 34 */ + { /* 20 Mhz */ { 52.0f, /* SGI */ 57.8f, }, + /* 40 Mhz */ { 108.0f, /* SGI */ 120.0f, }, + }, + + /* MCS 35 */ + { /* 20 Mhz */ { 65.0f, /* SGI */ 72.2f, }, + /* 40 Mhz */ { 135.0f, /* SGI */ 150.0f, }, + }, + + /* MCS 36 */ + { /* 20 Mhz */ { 58.5f, /* SGI */ 65.0f, }, + /* 40 Mhz */ { 121.5f, /* SGI */ 135.0f, }, + }, + + /* MCS 37 */ + { /* 20 Mhz */ { 78.0f, /* SGI */ 86.7f, }, + /* 40 Mhz */ { 162.0f, /* SGI */ 180.0f, }, + }, + + /* MCS 38 */ + { /* 20 Mhz */ { 97.5f, /* SGI */ 108.3f, }, + /* 40 Mhz */ { 202.5f, /* SGI */ 225.0f, }, + }, + + /* MCS 39 */ + { /* 20 Mhz */ { 52.0f, /* SGI */ 57.8f, }, + /* 40 Mhz */ { 108.0f, /* SGI */ 120.0f, }, + }, + + /* MCS 40 */ + { /* 20 Mhz */ { 65.0f, /* SGI */ 72.2f, }, + /* 40 Mhz */ { 135.0f, /* SGI */ 150.0f, }, + }, + + /* MCS 41 */ + { /* 20 Mhz */ { 65.0f, /* SGI */ 72.2f, }, + /* 40 Mhz */ { 135.0f, /* SGI */ 150.0f, }, + }, + + /* MCS 42 */ + { /* 20 Mhz */ { 78.0f, /* SGI */ 86.7f, }, + /* 40 Mhz */ { 162.0f, /* SGI */ 180.0f, }, + }, + + /* MCS 43 */ + { /* 20 Mhz */ { 91.0f, /* SGI */ 101.1f, }, + /* 40 Mhz */ { 189.0f, /* SGI */ 210.0f, }, + }, + + /* MCS 44 */ + { /* 20 Mhz */ { 91.0f, /* SGI */ 101.1f, }, + /* 40 Mhz */ { 189.0f, /* SGI */ 210.0f, }, + }, + + /* MCS 45 */ + { /* 20 Mhz */ { 104.0f, /* SGI */ 115.6f, }, + /* 40 Mhz */ { 216.0f, /* SGI */ 240.0f, }, + }, + + /* MCS 46 */ + { /* 20 Mhz */ { 78.0f, /* SGI */ 86.7f, }, + /* 40 Mhz */ { 162.0f, /* SGI */ 180.0f, }, + }, + + /* MCS 47 */ + { /* 20 Mhz */ { 97.5f, /* SGI */ 108.3f, }, + /* 40 Mhz */ { 202.5f, /* SGI */ 225.0f, }, + }, + + /* MCS 48 */ + { /* 20 Mhz */ { 97.5f, /* SGI */ 108.3f, }, + /* 40 Mhz */ { 202.5f, /* SGI */ 225.0f, }, + }, + + /* MCS 49 */ + { /* 20 Mhz */ { 117.0f, /* SGI */ 130.0f, }, + /* 40 Mhz */ { 243.0f, /* SGI */ 270.0f, }, + }, + + /* MCS 50 */ + { /* 20 Mhz */ { 136.5f, /* SGI */ 151.7f, }, + /* 40 Mhz */ { 283.5f, /* SGI */ 315.0f, }, + }, + + /* MCS 51 */ + { /* 20 Mhz */ { 136.5f, /* SGI */ 151.7f, }, + /* 40 Mhz */ { 283.5f, /* SGI */ 315.0f, }, + }, + + /* MCS 52 */ + { /* 20 Mhz */ { 156.0f, /* SGI */ 173.3f, }, + /* 40 Mhz */ { 324.0f, /* SGI */ 360.0f, }, + }, + + /* MCS 53 */ + { /* 20 Mhz */ { 65.0f, /* SGI */ 72.2f, }, + /* 40 Mhz */ { 135.0f, /* SGI */ 150.0f, }, + }, + + /* MCS 54 */ + { /* 20 Mhz */ { 78.0f, /* SGI */ 86.7f, }, + /* 40 Mhz */ { 162.0f, /* SGI */ 180.0f, }, + }, + + /* MCS 55 */ + { /* 20 Mhz */ { 91.0f, /* SGI */ 101.1f, }, + /* 40 Mhz */ { 189.0f, /* SGI */ 210.0f, }, + }, + + /* MCS 56 */ + { /* 20 Mhz */ { 78.0f, /* SGI */ 86.7f, }, + /* 40 Mhz */ { 162.0f, /* SGI */ 180.0f, }, + }, + + /* MCS 57 */ + { /* 20 Mhz */ { 91.0f, /* SGI */ 101.1f, }, + /* 40 Mhz */ { 189.0f, /* SGI */ 210.0f, }, + }, + + /* MCS 58 */ + { /* 20 Mhz */ { 104.0f, /* SGI */ 115.6f, }, + /* 40 Mhz */ { 216.0f, /* SGI */ 240.0f, }, + }, + + /* MCS 59 */ + { /* 20 Mhz */ { 117.0f, /* SGI */ 130.0f, }, + /* 40 Mhz */ { 243.0f, /* SGI */ 270.0f, }, + }, + + /* MCS 60 */ + { /* 20 Mhz */ { 104.0f, /* SGI */ 115.6f, }, + /* 40 Mhz */ { 216.0f, /* SGI */ 240.0f, }, + }, + + /* MCS 61 */ + { /* 20 Mhz */ { 117.0f, /* SGI */ 130.0f, }, + /* 40 Mhz */ { 243.0f, /* SGI */ 270.0f, }, + }, + + /* MCS 62 */ + { /* 20 Mhz */ { 130.0f, /* SGI */ 144.4f, }, + /* 40 Mhz */ { 270.0f, /* SGI */ 300.0f, }, + }, + + /* MCS 63 */ + { /* 20 Mhz */ { 130.0f, /* SGI */ 144.4f, }, + /* 40 Mhz */ { 270.0f, /* SGI */ 300.0f, }, + }, + + /* MCS 64 */ + { /* 20 Mhz */ { 143.0f, /* SGI */ 158.9f, }, + /* 40 Mhz */ { 297.0f, /* SGI */ 330.0f, }, + }, + + /* MCS 65 */ + { /* 20 Mhz */ { 97.5f, /* SGI */ 108.3f, }, + /* 40 Mhz */ { 202.5f, /* SGI */ 225.0f, }, + }, + + /* MCS 66 */ + { /* 20 Mhz */ { 117.0f, /* SGI */ 130.0f, }, + /* 40 Mhz */ { 243.0f, /* SGI */ 270.0f, }, + }, + + /* MCS 67 */ + { /* 20 Mhz */ { 136.5f, /* SGI */ 151.7f, }, + /* 40 Mhz */ { 283.5f, /* SGI */ 315.0f, }, + }, + + /* MCS 68 */ + { /* 20 Mhz */ { 117.0f, /* SGI */ 130.0f, }, + /* 40 Mhz */ { 243.0f, /* SGI */ 270.0f, }, + }, + + /* MCS 69 */ + { /* 20 Mhz */ { 136.5f, /* SGI */ 151.7f, }, + /* 40 Mhz */ { 283.5f, /* SGI */ 315.0f, }, + }, + + /* MCS 70 */ + { /* 20 Mhz */ { 156.0f, /* SGI */ 173.3f, }, + /* 40 Mhz */ { 324.0f, /* SGI */ 360.0f, }, + }, + + /* MCS 71 */ + { /* 20 Mhz */ { 175.5f, /* SGI */ 195.0f, }, + /* 40 Mhz */ { 364.5f, /* SGI */ 405.0f, }, + }, + + /* MCS 72 */ + { /* 20 Mhz */ { 156.0f, /* SGI */ 173.3f, }, + /* 40 Mhz */ { 324.0f, /* SGI */ 360.0f, }, + }, + + /* MCS 73 */ + { /* 20 Mhz */ { 175.5f, /* SGI */ 195.0f, }, + /* 40 Mhz */ { 364.5f, /* SGI */ 405.0f, }, + }, + + /* MCS 74 */ + { /* 20 Mhz */ { 195.0f, /* SGI */ 216.7f, }, + /* 40 Mhz */ { 405.0f, /* SGI */ 450.0f, }, + }, + + /* MCS 75 */ + { /* 20 Mhz */ { 195.0f, /* SGI */ 216.7f, }, + /* 40 Mhz */ { 405.0f, /* SGI */ 450.0f, }, + }, + + /* MCS 76 */ + { /* 20 Mhz */ { 214.5f, /* SGI */ 238.3f, }, + /* 40 Mhz */ { 445.5f, /* SGI */ 495.0f, }, + }, +}; + +static const char *auth_alg_text[]={"Open System","Shared Key","EAP"}; +#define NUM_AUTH_ALGS (sizeof(auth_alg_text) / sizeof(auth_alg_text[0])) + +static const char *status_text[] = { + "Successful", /* 0 */ + "Unspecified failure", /* 1 */ + "TDLS wakeup schedule rejected but alternative schedule " + "provided", /* 2 */ + "TDLS wakeup schedule rejected",/* 3 */ + "Reserved", /* 4 */ + "Security disabled", /* 5 */ + "Unacceptable lifetime", /* 6 */ + "Not in same BSS", /* 7 */ + "Reserved", /* 8 */ + "Reserved", /* 9 */ + "Cannot Support all requested capabilities in the Capability " + "Information field", /* 10 */ + "Reassociation denied due to inability to confirm that association " + "exists", /* 11 */ + "Association denied due to reason outside the scope of this " + "standard", /* 12 */ + "Responding STA does not support the specified authentication " + "algorithm", /* 13 */ + "Received an Authentication frame with authentication transaction " + "sequence number out of expected sequence", /* 14 */ + "Authentication rejected because of challenge failure", /* 15 */ + "Authentication rejected due to timeout waiting for next frame in " + "sequence", /* 16 */ + "Association denied because AP is unable to handle " + "additional associated STAs", /* 17 */ + "Association denied due to requesting STA not supporting " + "all of the data rates in the BSSBasicRateSet parameter, " + "the Basic HT-MCS Set field of the HT Operation " + "parameter, or the Basic VHT-MCS and NSS Set field in " + "the VHT Operation parameter", /* 18 */ + "Association denied due to requesting STA not supporting " + "the short preamble option", /* 19 */ + "Reserved", /* 20 */ + "Reserved", /* 21 */ + "Association request rejected because Spectrum Management " + "capability is required", /* 22 */ + "Association request rejected because the information in the " + "Power Capability element is unacceptable", /* 23 */ + "Association request rejected because the information in the " + "Supported Channels element is unacceptable", /* 24 */ + "Association denied due to requesting STA not supporting " + "the Short Slot Time option", /* 25 */ + "Reserved", /* 26 */ + "Association denied because the requested STA does not support HT " + "features", /* 27 */ + "R0KH unreachable", /* 28 */ + "Association denied because the requesting STA does not " + "support the phased coexistence operation (PCO) " + "transition time required by the AP", /* 29 */ + "Association request rejected temporarily; try again " + "later", /* 30 */ + "Robust management frame policy violation", /* 31 */ + "Unspecified, QoS-related failure", /* 32 */ + "Association denied because QoS AP or PCP has " + "insufficient bandwidth to handle another QoS " + "STA", /* 33 */ + "Association denied due to excessive frame loss rates and/or " + "poor conditions on current operating channel", /* 34 */ + "Association (with QoS BSS) denied because the requesting STA " + "does not support the QoS facility", /* 35 */ + "Reserved", /* 36 */ + "The request has been declined", /* 37 */ + "The request has not been successful as one or more parameters " + "have invalid values", /* 38 */ + "The allocation or TS has not been created because the request " + "cannot be honored; however, a suggested TSPEC/DMG TSPEC is " + "provided so that the initiating STA can attempt to set " + "another allocation or TS with the suggested changes to the " + "TSPEC/DMG TSPEC", /* 39 */ + "Invalid element, i.e., an element defined in this standard " + "for which the content does not meet the specifications in " + "Clause 9", /* 40 */ + "Invalid group cipher", /* 41 */ + "Invalid pairwise cipher", /* 42 */ + "Invalid AKMP", /* 43 */ + "Unsupported RSNE version", /* 44 */ + "Invalid RSNE capabilities", /* 45 */ + "Cipher suite rejected because of security policy", /* 46 */ + "The TS or allocation has not been created; however, the " + "HC or PCP might be capable of creating a TS or " + "allocation, in response to a request, after the time " + "indicated in the TS Delay element", /* 47 */ + "Direct Link is not allowed in the BSS by policy", /* 48 */ + "The Destination STA is not present within this BSS", /* 49 */ + "The Destination STA is not a QoS STA", /* 50 */ + + "Association denied because the listen interval is " + "too large", /* 51 */ + "Invalid FT Action frame count", /* 52 */ + "Invalid pairwise master key identifier (PMKID)", /* 53 */ + "Invalid MDE", /* 54 */ + "Invalid FTE", /* 55 */ + "Requested TCLAS processing is not supported by the AP " + "or PCP", /* 56 */ + "The AP or PCP has insufficient TCLAS processing " + "resources to satisfy the request", /* 57 */ + "The TS has not been created because the request " + "cannot be honored; however, the HC or PCP suggests " + "that the STA transition to a different BSS to set up " + "the TS", /* 58 */ + "GAS Advertisement Protocol not supported", /* 59 */ + "No outstanding GAS request", /* 60 */ + "GAS Response not received from the Advertisement " + "Server", /* 61 */ + "STA timed out waiting for GAS Query Response", /* 62 */ + "LARGE GAS Response is larger than query response " + "length limit", /* 63 */ + "Request refused because home network does not support " + "request", /* 64 */ + "Advertisement Server in the network is not currently " + "reachable", /* 65 */ + "Reserved", /* 66 */ + "Request refused due to permissions received via SSPN " + "interface", /* 67 */ + "Request refused because the AP or PCP does not " + "support unauthenticated access", /* 68 */ + "Reserved", /* 69 */ + "Reserved", /* 70 */ + "Reserved", /* 71 */ + "Invalid contents of RSNE", /* 72 */ + "U-APSD coexistence is not supported", /* 73 */ + "Requested U-APSD coexistence mode is not supported", /* 74 */ + "Requested Interval/Duration value cannot be " + "supported with U-APSD coexistence", /* 75 */ + "Authentication is rejected because an Anti-Clogging " + "Token is required", /* 76 */ + "Authentication is rejected because the offered " + "finite cyclic group is not supported", /* 77 */ + "The TBTT adjustment request has not been successful " + "because the STA could not find an alternative TBTT", /* 78 */ + "Transmission failure", /* 79 */ + "Requested TCLAS Not Supported", /* 80 */ + "TCLAS Resources Exhausted", /* 81 */ + "Rejected with Suggested BSS transition", /* 82 */ + "Reject with recommended schedule", /* 83 */ + "Reject because no wakeup schedule specified", /* 84 */ + "Success, the destination STA is in power save mode", /* 85 */ + "FST pending, in process of admitting FST session", /* 86 */ + "Performing FST now", /* 87 */ + "FST pending, gap(s) in block ack window", /* 88 */ + "Reject because of U-PID setting", /* 89 */ + "Reserved", /* 90 */ + "Reserved", /* 91 */ + "(Re)Association refused for some external reason", /* 92 */ + "(Re)Association refused because of memory limits " + "at the AP", /* 93 */ + "(Re)Association refused because emergency services " + "are not supported at the AP", /* 94 */ + "GAS query response not yet received", /* 95 */ + "Reject since the request is for transition to a " + "frequency band subject to DSE procedures and " + "FST Initiator is a dependent STA", /* 96 */ + "Requested TCLAS processing has been terminated by " + "the AP", /* 97 */ + "The TS schedule conflicts with an existing " + "schedule; an alternative schedule is provided", /* 98 */ + "The association has been denied; however, one or " + "more Multi-band elements are included that can " + "be used by the receiving STA to join the BSS", /* 99 */ + "The request failed due to a reservation conflict", /* 100 */ + "The request failed due to exceeded MAF limit", /* 101 */ + "The request failed due to exceeded MCCA track " + "limit", /* 102 */ + "Association denied because the information in the" + "Spectrum Management field is unacceptable", /* 103 */ + "Association denied because the requesting STA " + "does not support VHT features", /* 104 */ + "Enablement denied", /* 105 */ + "Enablement denied due to restriction from an " + "authorized GDB", /* 106 */ + "Authorization deenabled", /* 107 */ +}; +#define NUM_STATUSES (sizeof(status_text) / sizeof(status_text[0])) + +static const char *reason_text[] = { + "Reserved", /* 0 */ + "Unspecified reason", /* 1 */ + "Previous authentication no longer valid", /* 2 */ + "Deauthenticated because sending STA is leaving (or has left) " + "IBSS or ESS", /* 3 */ + "Disassociated due to inactivity", /* 4 */ + "Disassociated because AP is unable to handle all currently " + " associated STAs", /* 5 */ + "Class 2 frame received from nonauthenticated STA", /* 6 */ + "Class 3 frame received from nonassociated STA", /* 7 */ + "Disassociated because sending STA is leaving " + "(or has left) BSS", /* 8 */ + "STA requesting (re)association is not authenticated with " + "responding STA", /* 9 */ + "Disassociated because the information in the Power Capability " + "element is unacceptable", /* 10 */ + "Disassociated because the information in the Supported Channels " + "element is unacceptable", /* 11 */ + "Disassociated due to BSS transition management", /* 12 */ + "Invalid element, i.e., an element defined in this standard for " + "which the content does not meet the specifications " + "in Clause 9", /* 13 */ + "Message integrity code (MIC) failure", /* 14 */ + "4-Way Handshake timeout", /* 15 */ + "Group key handshake timeout", /* 16 */ + "Information element in 4-Way Handshake different from (Re)Association" + "Request/Probe Response/Beacon frame", /* 17 */ + "Invalid group cipher", /* 18 */ + "Invalid pairwise cipher", /* 19 */ + "Invalid AKMP", /* 20 */ + "Unsupported RSNE version", /* 21 */ + "Invalid RSNE capabilities", /* 22 */ + "IEEE 802.1X authentication failed", /* 23 */ + "Cipher suite rejected because of the security policy", /* 24 */ + "TDLS direct-link teardown due to TDLS peer STA " + "unreachable via the TDLS direct link", /* 25 */ + "TDLS direct-link teardown for unspecified reason", /* 26 */ + "Disassociated because session terminated by SSP request",/* 27 */ + "Disassociated because of lack of SSP roaming agreement",/* 28 */ + "Requested service rejected because of SSP cipher suite or " + "AKM requirement", /* 29 */ + "Requested service not authorized in this location", /* 30 */ + "TS deleted because QoS AP lacks sufficient bandwidth for this " + "QoS STA due to a change in BSS service characteristics or " + "operational mode (e.g. an HT BSS change from 40 MHz channel " + "to 20 MHz channel)", /* 31 */ + "Disassociated for unspecified, QoS-related reason", /* 32 */ + "Disassociated because QoS AP lacks sufficient bandwidth for this " + "QoS STA", /* 33 */ + "Disassociated because of excessive number of frames that need to be " + "acknowledged, but are not acknowledged due to AP transmissions " + "and/or poor channel conditions", /* 34 */ + "Disassociated because STA is transmitting outside the limits " + "of its TXOPs", /* 35 */ + "Requested from peer STA as the STA is leaving the BSS " + "(or resetting)", /* 36 */ + "Requested from peer STA as it does not want to use the " + "mechanism", /* 37 */ + "Requested from peer STA as the STA received frames using the " + "mechanism for which a set up is required", /* 38 */ + "Requested from peer STA due to time out", /* 39 */ + "Reserved", /* 40 */ + "Reserved", /* 41 */ + "Reserved", /* 42 */ + "Reserved", /* 43 */ + "Reserved", /* 44 */ + "Peer STA does not support the requested cipher suite", /* 45 */ + "In a DLS Teardown frame: The teardown was initiated by the " + "DLS peer. In a Disassociation frame: Disassociated because " + "authorized access limit reached", /* 46 */ + "In a DLS Teardown frame: The teardown was initiated by the " + "AP. In a Disassociation frame: Disassociated due to external " + "service requirements", /* 47 */ + "Invalid FT Action frame count", /* 48 */ + "Invalid pairwise master key identifier (PMKID)", /* 49 */ + "Invalid MDE", /* 50 */ + "Invalid FTE", /* 51 */ + "Mesh peering canceled for unknown reasons", /* 52 */ + "The mesh STA has reached the supported maximum number of " + "peer mesh STAs", /* 53 */ + "The received information violates the Mesh Configuration " + "policy configured in the mesh STA profile", /* 54 */ + "The mesh STA has received a Mesh Peering Close frame " + "requesting to close the mesh peering", /* 55 */ + "The mesh STA has resent dot11MeshMaxRetries Mesh " + "Peering Open frames, without receiving a Mesh Peering " + "Confirm frame", /* 56 */ + "The confirmTimer for the mesh peering instance times out", /* 57 */ + "The mesh STA fails to unwrap the GTK or the values in the " + "wrapped contents do not match", /* 58 */ + "The mesh STA receives inconsistent information about the " + "mesh parameters between mesh peering Management frames", /* 59 */ + "The mesh STA fails the authenticated mesh peering exchange " + "because due to failure in selecting either the pairwise " + "ciphersuite or group ciphersuite", /* 60 */ + "The mesh STA does not have proxy information for this " + "external destination", /* 61 */ + "The mesh STA does not have forwarding information for this " + "destination", /* 62 */ + "The mesh STA determines that the link to the next hop of an " + "active path in its forwarding information is no longer " + "usable", /* 63 */ + "The Deauthentication frame was sent because the MAC " + "address of the STA already exists in the mesh BSS", /* 64 */ + "The mesh STA performs channel switch to meet regulatory " + "requirements", /* 65 */ + "The mesh STA performs channel switching with unspecified " + "reason", /* 66 */ +}; +#define NUM_REASONS (sizeof(reason_text) / sizeof(reason_text[0])) + +static int +wep_print(netdissect_options *ndo, + const u_char *p) +{ + uint32_t iv; + + ND_TCHECK_LEN(p, IEEE802_11_IV_LEN + IEEE802_11_KID_LEN); + iv = GET_LE_U_4(p); + + ND_PRINT(" IV:%3x Pad %x KeyID %x", IV_IV(iv), IV_PAD(iv), + IV_KEYID(iv)); + + return 1; +trunc: + return 0; +} + +static int +parse_elements(netdissect_options *ndo, + struct mgmt_body_t *pbody, const u_char *p, int offset, + u_int length) +{ + u_int elementlen; + struct ssid_t ssid; + struct challenge_t challenge; + struct rates_t rates; + struct ds_t ds; + struct cf_t cf; + struct tim_t tim; + + /* + * We haven't seen any elements yet. + */ + pbody->challenge_present = 0; + pbody->ssid_present = 0; + pbody->rates_present = 0; + pbody->ds_present = 0; + pbody->cf_present = 0; + pbody->tim_present = 0; + + while (length != 0) { + /* Make sure we at least have the element ID and length. */ + ND_TCHECK_2(p + offset); + if (length < 2) + goto trunc; + elementlen = GET_U_1(p + offset + 1); + + /* Make sure we have the entire element. */ + ND_TCHECK_LEN(p + offset + 2, elementlen); + if (length < elementlen + 2) + goto trunc; + + switch (GET_U_1(p + offset)) { + case E_SSID: + memcpy(&ssid, p + offset, 2); + offset += 2; + length -= 2; + if (ssid.length != 0) { + if (ssid.length > sizeof(ssid.ssid) - 1) + return 0; + memcpy(&ssid.ssid, p + offset, ssid.length); + offset += ssid.length; + length -= ssid.length; + } + ssid.ssid[ssid.length] = '\0'; + /* + * Present and not truncated. + * + * If we haven't already seen an SSID IE, + * copy this one, otherwise ignore this one, + * so we later report the first one we saw. + */ + if (!pbody->ssid_present) { + pbody->ssid = ssid; + pbody->ssid_present = 1; + } + break; + case E_CHALLENGE: + memcpy(&challenge, p + offset, 2); + offset += 2; + length -= 2; + if (challenge.length != 0) { + if (challenge.length > + sizeof(challenge.text) - 1) + return 0; + memcpy(&challenge.text, p + offset, + challenge.length); + offset += challenge.length; + length -= challenge.length; + } + challenge.text[challenge.length] = '\0'; + /* + * Present and not truncated. + * + * If we haven't already seen a challenge IE, + * copy this one, otherwise ignore this one, + * so we later report the first one we saw. + */ + if (!pbody->challenge_present) { + pbody->challenge = challenge; + pbody->challenge_present = 1; + } + break; + case E_RATES: + memcpy(&rates, p + offset, 2); + offset += 2; + length -= 2; + if (rates.length != 0) { + if (rates.length > sizeof(rates.rate)) + return 0; + memcpy(&rates.rate, p + offset, rates.length); + offset += rates.length; + length -= rates.length; + } + /* + * Present and not truncated. + * + * If we haven't already seen a rates IE, + * copy this one if it's not zero-length, + * otherwise ignore this one, so we later + * report the first one we saw. + * + * We ignore zero-length rates IEs as some + * devices seem to put a zero-length rates + * IE, followed by an SSID IE, followed by + * a non-zero-length rates IE into frames, + * even though IEEE Std 802.11-2007 doesn't + * seem to indicate that a zero-length rates + * IE is valid. + */ + if (!pbody->rates_present && rates.length != 0) { + pbody->rates = rates; + pbody->rates_present = 1; + } + break; + case E_DS: + memcpy(&ds, p + offset, 2); + offset += 2; + length -= 2; + if (ds.length != 1) { + offset += ds.length; + length -= ds.length; + break; + } + ds.channel = GET_U_1(p + offset); + offset += 1; + length -= 1; + /* + * Present and not truncated. + * + * If we haven't already seen a DS IE, + * copy this one, otherwise ignore this one, + * so we later report the first one we saw. + */ + if (!pbody->ds_present) { + pbody->ds = ds; + pbody->ds_present = 1; + } + break; + case E_CF: + memcpy(&cf, p + offset, 2); + offset += 2; + length -= 2; + if (cf.length != 6) { + offset += cf.length; + length -= cf.length; + break; + } + cf.count = GET_U_1(p + offset); + offset += 1; + length -= 1; + cf.period = GET_U_1(p + offset); + offset += 1; + length -= 1; + cf.max_duration = GET_LE_U_2(p + offset); + offset += 2; + length -= 2; + cf.dur_remaining = GET_LE_U_2(p + offset); + offset += 2; + length -= 2; + /* + * Present and not truncated. + * + * If we haven't already seen a CF IE, + * copy this one, otherwise ignore this one, + * so we later report the first one we saw. + */ + if (!pbody->cf_present) { + pbody->cf = cf; + pbody->cf_present = 1; + } + break; + case E_TIM: + memcpy(&tim, p + offset, 2); + offset += 2; + length -= 2; + if (tim.length <= 3U) { + offset += tim.length; + length -= tim.length; + break; + } + if (tim.length - 3U > sizeof(tim.bitmap)) + return 0; + tim.count = GET_U_1(p + offset); + offset += 1; + length -= 1; + tim.period = GET_U_1(p + offset); + offset += 1; + length -= 1; + tim.bitmap_control = GET_U_1(p + offset); + offset += 1; + length -= 1; + memcpy(tim.bitmap, p + offset, tim.length - 3); + offset += tim.length - 3; + length -= tim.length - 3; + /* + * Present and not truncated. + * + * If we haven't already seen a TIM IE, + * copy this one, otherwise ignore this one, + * so we later report the first one we saw. + */ + if (!pbody->tim_present) { + pbody->tim = tim; + pbody->tim_present = 1; + } + break; + default: +#if 0 + ND_PRINT("(1) unhandled element_id (%u) ", + GET_U_1(p + offset)); +#endif + offset += 2 + elementlen; + length -= 2 + elementlen; + break; + } + } + + /* No problems found. */ + return 1; +trunc: + return 0; +} + +/********************************************************************************* + * Print Handle functions for the management frame types + *********************************************************************************/ + +static int +handle_beacon(netdissect_options *ndo, + const u_char *p, u_int length) +{ + struct mgmt_body_t pbody; + int offset = 0; + int ret; + + memset(&pbody, 0, sizeof(pbody)); + + ND_TCHECK_LEN(p, IEEE802_11_TSTAMP_LEN + IEEE802_11_BCNINT_LEN + + IEEE802_11_CAPINFO_LEN); + if (length < IEEE802_11_TSTAMP_LEN + IEEE802_11_BCNINT_LEN + + IEEE802_11_CAPINFO_LEN) + goto trunc; + memcpy(&pbody.timestamp, p, IEEE802_11_TSTAMP_LEN); + offset += IEEE802_11_TSTAMP_LEN; + length -= IEEE802_11_TSTAMP_LEN; + pbody.beacon_interval = GET_LE_U_2(p + offset); + offset += IEEE802_11_BCNINT_LEN; + length -= IEEE802_11_BCNINT_LEN; + pbody.capability_info = GET_LE_U_2(p + offset); + offset += IEEE802_11_CAPINFO_LEN; + length -= IEEE802_11_CAPINFO_LEN; + + ret = parse_elements(ndo, &pbody, p, offset, length); + + PRINT_SSID(pbody); + PRINT_RATES(pbody); + ND_PRINT(" %s", + CAPABILITY_ESS(pbody.capability_info) ? "ESS" : "IBSS"); + PRINT_DS_CHANNEL(pbody); + + return ret; +trunc: + return 0; +} + +static int +handle_assoc_request(netdissect_options *ndo, + const u_char *p, u_int length) +{ + struct mgmt_body_t pbody; + int offset = 0; + int ret; + + memset(&pbody, 0, sizeof(pbody)); + + ND_TCHECK_LEN(p, IEEE802_11_CAPINFO_LEN + IEEE802_11_LISTENINT_LEN); + if (length < IEEE802_11_CAPINFO_LEN + IEEE802_11_LISTENINT_LEN) + goto trunc; + pbody.capability_info = GET_LE_U_2(p); + offset += IEEE802_11_CAPINFO_LEN; + length -= IEEE802_11_CAPINFO_LEN; + pbody.listen_interval = GET_LE_U_2(p + offset); + offset += IEEE802_11_LISTENINT_LEN; + length -= IEEE802_11_LISTENINT_LEN; + + ret = parse_elements(ndo, &pbody, p, offset, length); + + PRINT_SSID(pbody); + PRINT_RATES(pbody); + return ret; +trunc: + return 0; +} + +static int +handle_assoc_response(netdissect_options *ndo, + const u_char *p, u_int length) +{ + struct mgmt_body_t pbody; + int offset = 0; + int ret; + + memset(&pbody, 0, sizeof(pbody)); + + ND_TCHECK_LEN(p, IEEE802_11_CAPINFO_LEN + IEEE802_11_STATUS_LEN + + IEEE802_11_AID_LEN); + if (length < IEEE802_11_CAPINFO_LEN + IEEE802_11_STATUS_LEN + + IEEE802_11_AID_LEN) + goto trunc; + pbody.capability_info = GET_LE_U_2(p); + offset += IEEE802_11_CAPINFO_LEN; + length -= IEEE802_11_CAPINFO_LEN; + pbody.status_code = GET_LE_U_2(p + offset); + offset += IEEE802_11_STATUS_LEN; + length -= IEEE802_11_STATUS_LEN; + pbody.aid = GET_LE_U_2(p + offset); + offset += IEEE802_11_AID_LEN; + length -= IEEE802_11_AID_LEN; + + ret = parse_elements(ndo, &pbody, p, offset, length); + + ND_PRINT(" AID(%x) :%s: %s", ((uint16_t)(pbody.aid << 2 )) >> 2 , + CAPABILITY_PRIVACY(pbody.capability_info) ? " PRIVACY " : "", + (pbody.status_code < NUM_STATUSES + ? status_text[pbody.status_code] + : "n/a")); + + return ret; +trunc: + return 0; +} + +static int +handle_reassoc_request(netdissect_options *ndo, + const u_char *p, u_int length) +{ + struct mgmt_body_t pbody; + int offset = 0; + int ret; + + memset(&pbody, 0, sizeof(pbody)); + + ND_TCHECK_LEN(p, IEEE802_11_CAPINFO_LEN + IEEE802_11_LISTENINT_LEN + + IEEE802_11_AP_LEN); + if (length < IEEE802_11_CAPINFO_LEN + IEEE802_11_LISTENINT_LEN + + IEEE802_11_AP_LEN) + goto trunc; + pbody.capability_info = GET_LE_U_2(p); + offset += IEEE802_11_CAPINFO_LEN; + length -= IEEE802_11_CAPINFO_LEN; + pbody.listen_interval = GET_LE_U_2(p + offset); + offset += IEEE802_11_LISTENINT_LEN; + length -= IEEE802_11_LISTENINT_LEN; + memcpy(&pbody.ap, p+offset, IEEE802_11_AP_LEN); + offset += IEEE802_11_AP_LEN; + length -= IEEE802_11_AP_LEN; + + ret = parse_elements(ndo, &pbody, p, offset, length); + + PRINT_SSID(pbody); + ND_PRINT(" AP : %s", etheraddr_string(ndo, pbody.ap )); + + return ret; +trunc: + return 0; +} + +static int +handle_reassoc_response(netdissect_options *ndo, + const u_char *p, u_int length) +{ + /* Same as a Association Response */ + return handle_assoc_response(ndo, p, length); +} + +static int +handle_probe_request(netdissect_options *ndo, + const u_char *p, u_int length) +{ + struct mgmt_body_t pbody; + int offset = 0; + int ret; + + memset(&pbody, 0, sizeof(pbody)); + + ret = parse_elements(ndo, &pbody, p, offset, length); + + PRINT_SSID(pbody); + PRINT_RATES(pbody); + + return ret; +} + +static int +handle_probe_response(netdissect_options *ndo, + const u_char *p, u_int length) +{ + struct mgmt_body_t pbody; + int offset = 0; + int ret; + + memset(&pbody, 0, sizeof(pbody)); + + ND_TCHECK_LEN(p, IEEE802_11_TSTAMP_LEN + IEEE802_11_BCNINT_LEN + + IEEE802_11_CAPINFO_LEN); + if (length < IEEE802_11_TSTAMP_LEN + IEEE802_11_BCNINT_LEN + + IEEE802_11_CAPINFO_LEN) + goto trunc; + memcpy(&pbody.timestamp, p, IEEE802_11_TSTAMP_LEN); + offset += IEEE802_11_TSTAMP_LEN; + length -= IEEE802_11_TSTAMP_LEN; + pbody.beacon_interval = GET_LE_U_2(p + offset); + offset += IEEE802_11_BCNINT_LEN; + length -= IEEE802_11_BCNINT_LEN; + pbody.capability_info = GET_LE_U_2(p + offset); + offset += IEEE802_11_CAPINFO_LEN; + length -= IEEE802_11_CAPINFO_LEN; + + ret = parse_elements(ndo, &pbody, p, offset, length); + + PRINT_SSID(pbody); + PRINT_RATES(pbody); + PRINT_DS_CHANNEL(pbody); + + return ret; +trunc: + return 0; +} + +static int +handle_atim(void) +{ + /* the frame body for ATIM is null. */ + return 1; +} + +static int +handle_disassoc(netdissect_options *ndo, + const u_char *p, u_int length) +{ + struct mgmt_body_t pbody; + + memset(&pbody, 0, sizeof(pbody)); + + ND_TCHECK_LEN(p, IEEE802_11_REASON_LEN); + if (length < IEEE802_11_REASON_LEN) + goto trunc; + pbody.reason_code = GET_LE_U_2(p); + + ND_PRINT(": %s", + (pbody.reason_code < NUM_REASONS) + ? reason_text[pbody.reason_code] + : "Reserved"); + + return 1; +trunc: + return 0; +} + +static int +handle_auth(netdissect_options *ndo, + const u_char *p, u_int length) +{ + struct mgmt_body_t pbody; + int offset = 0; + int ret; + + memset(&pbody, 0, sizeof(pbody)); + + ND_TCHECK_6(p); + if (length < 6) + goto trunc; + pbody.auth_alg = GET_LE_U_2(p); + offset += 2; + length -= 2; + pbody.auth_trans_seq_num = GET_LE_U_2(p + offset); + offset += 2; + length -= 2; + pbody.status_code = GET_LE_U_2(p + offset); + offset += 2; + length -= 2; + + ret = parse_elements(ndo, &pbody, p, offset, length); + + if ((pbody.auth_alg == 1) && + ((pbody.auth_trans_seq_num == 2) || + (pbody.auth_trans_seq_num == 3))) { + ND_PRINT(" (%s)-%x [Challenge Text] %s", + (pbody.auth_alg < NUM_AUTH_ALGS) + ? auth_alg_text[pbody.auth_alg] + : "Reserved", + pbody.auth_trans_seq_num, + ((pbody.auth_trans_seq_num % 2) + ? ((pbody.status_code < NUM_STATUSES) + ? status_text[pbody.status_code] + : "n/a") : "")); + return ret; + } + ND_PRINT(" (%s)-%x: %s", + (pbody.auth_alg < NUM_AUTH_ALGS) + ? auth_alg_text[pbody.auth_alg] + : "Reserved", + pbody.auth_trans_seq_num, + (pbody.auth_trans_seq_num % 2) + ? ((pbody.status_code < NUM_STATUSES) + ? status_text[pbody.status_code] + : "n/a") + : ""); + + return ret; +trunc: + return 0; +} + +static int +handle_deauth(netdissect_options *ndo, + const uint8_t *src, const u_char *p, u_int length) +{ + struct mgmt_body_t pbody; + const char *reason = NULL; + + memset(&pbody, 0, sizeof(pbody)); + + ND_TCHECK_LEN(p, IEEE802_11_REASON_LEN); + if (length < IEEE802_11_REASON_LEN) + goto trunc; + pbody.reason_code = GET_LE_U_2(p); + + reason = (pbody.reason_code < NUM_REASONS) + ? reason_text[pbody.reason_code] + : "Reserved"; + + if (ndo->ndo_eflag) { + ND_PRINT(": %s", reason); + } else { + ND_PRINT(" (%s): %s", GET_ETHERADDR_STRING(src), reason); + } + return 1; +trunc: + return 0; +} + +#define PRINT_HT_ACTION(v) (\ + (v) == 0 ? ND_PRINT("TxChWidth"): \ + (v) == 1 ? ND_PRINT("MIMOPwrSave"): \ + ND_PRINT("Act#%u", (v))) +#define PRINT_BA_ACTION(v) (\ + (v) == 0 ? ND_PRINT("ADDBA Request"): \ + (v) == 1 ? ND_PRINT("ADDBA Response"): \ + (v) == 2 ? ND_PRINT("DELBA"): \ + ND_PRINT("Act#%u", (v))) +#define PRINT_MESHLINK_ACTION(v) (\ + (v) == 0 ? ND_PRINT("Request"): \ + (v) == 1 ? ND_PRINT("Report"): \ + ND_PRINT("Act#%u", (v))) +#define PRINT_MESHPEERING_ACTION(v) (\ + (v) == 0 ? ND_PRINT("Open"): \ + (v) == 1 ? ND_PRINT("Confirm"): \ + (v) == 2 ? ND_PRINT("Close"): \ + ND_PRINT("Act#%u", (v))) +#define PRINT_MESHPATH_ACTION(v) (\ + (v) == 0 ? ND_PRINT("Request"): \ + (v) == 1 ? ND_PRINT("Report"): \ + (v) == 2 ? ND_PRINT("Error"): \ + (v) == 3 ? ND_PRINT("RootAnnouncement"): \ + ND_PRINT("Act#%u", (v))) + +#define PRINT_MESH_ACTION(v) (\ + (v) == 0 ? ND_PRINT("MeshLink"): \ + (v) == 1 ? ND_PRINT("HWMP"): \ + (v) == 2 ? ND_PRINT("Gate Announcement"): \ + (v) == 3 ? ND_PRINT("Congestion Control"): \ + (v) == 4 ? ND_PRINT("MCCA Setup Request"): \ + (v) == 5 ? ND_PRINT("MCCA Setup Reply"): \ + (v) == 6 ? ND_PRINT("MCCA Advertisement Request"): \ + (v) == 7 ? ND_PRINT("MCCA Advertisement"): \ + (v) == 8 ? ND_PRINT("MCCA Teardown"): \ + (v) == 9 ? ND_PRINT("TBTT Adjustment Request"): \ + (v) == 10 ? ND_PRINT("TBTT Adjustment Response"): \ + ND_PRINT("Act#%u", (v))) +#define PRINT_MULTIHOP_ACTION(v) (\ + (v) == 0 ? ND_PRINT("Proxy Update"): \ + (v) == 1 ? ND_PRINT("Proxy Update Confirmation"): \ + ND_PRINT("Act#%u", (v))) +#define PRINT_SELFPROT_ACTION(v) (\ + (v) == 1 ? ND_PRINT("Peering Open"): \ + (v) == 2 ? ND_PRINT("Peering Confirm"): \ + (v) == 3 ? ND_PRINT("Peering Close"): \ + (v) == 4 ? ND_PRINT("Group Key Inform"): \ + (v) == 5 ? ND_PRINT("Group Key Acknowledge"): \ + ND_PRINT("Act#%u", (v))) + +static int +handle_action(netdissect_options *ndo, + const uint8_t *src, const u_char *p, u_int length) +{ + ND_TCHECK_2(p); + if (length < 2) + goto trunc; + if (ndo->ndo_eflag) { + ND_PRINT(": "); + } else { + ND_PRINT(" (%s): ", GET_ETHERADDR_STRING(src)); + } + switch (GET_U_1(p)) { + case 0: ND_PRINT("Spectrum Management Act#%u", GET_U_1(p + 1)); break; + case 1: ND_PRINT("QoS Act#%u", GET_U_1(p + 1)); break; + case 2: ND_PRINT("DLS Act#%u", GET_U_1(p + 1)); break; + case 3: ND_PRINT("BA "); PRINT_BA_ACTION(GET_U_1(p + 1)); break; + case 7: ND_PRINT("HT "); PRINT_HT_ACTION(GET_U_1(p + 1)); break; + case 13: ND_PRINT("MeshAction "); PRINT_MESH_ACTION(GET_U_1(p + 1)); break; + case 14: + ND_PRINT("MultiohopAction "); + PRINT_MULTIHOP_ACTION(GET_U_1(p + 1)); break; + case 15: + ND_PRINT("SelfprotectAction "); + PRINT_SELFPROT_ACTION(GET_U_1(p + 1)); break; + case 127: ND_PRINT("Vendor Act#%u", GET_U_1(p + 1)); break; + default: + ND_PRINT("Reserved(%u) Act#%u", GET_U_1(p), GET_U_1(p + 1)); + break; + } + return 1; +trunc: + return 0; +} + + +/********************************************************************************* + * Print Body funcs + *********************************************************************************/ + + +static int +mgmt_body_print(netdissect_options *ndo, + uint16_t fc, const uint8_t *src, const u_char *p, u_int length) +{ + ND_PRINT("%s", tok2str(st_str, "Unhandled Management subtype(%x)", FC_SUBTYPE(fc))); + + /* There may be a problem w/ AP not having this bit set */ + if (FC_PROTECTED(fc)) + return wep_print(ndo, p); + switch (FC_SUBTYPE(fc)) { + case ST_ASSOC_REQUEST: + return handle_assoc_request(ndo, p, length); + case ST_ASSOC_RESPONSE: + return handle_assoc_response(ndo, p, length); + case ST_REASSOC_REQUEST: + return handle_reassoc_request(ndo, p, length); + case ST_REASSOC_RESPONSE: + return handle_reassoc_response(ndo, p, length); + case ST_PROBE_REQUEST: + return handle_probe_request(ndo, p, length); + case ST_PROBE_RESPONSE: + return handle_probe_response(ndo, p, length); + case ST_BEACON: + return handle_beacon(ndo, p, length); + case ST_ATIM: + return handle_atim(); + case ST_DISASSOC: + return handle_disassoc(ndo, p, length); + case ST_AUTH: + return handle_auth(ndo, p, length); + case ST_DEAUTH: + return handle_deauth(ndo, src, p, length); + case ST_ACTION: + return handle_action(ndo, src, p, length); + default: + return 1; + } +} + + +/********************************************************************************* + * Handles printing all the control frame types + *********************************************************************************/ + +static int +ctrl_body_print(netdissect_options *ndo, + uint16_t fc, const u_char *p) +{ + ND_PRINT("%s", tok2str(ctrl_str, "Unknown Ctrl Subtype", FC_SUBTYPE(fc))); + switch (FC_SUBTYPE(fc)) { + case CTRL_CONTROL_WRAPPER: + /* XXX - requires special handling */ + break; + case CTRL_BAR: + ND_TCHECK_LEN(p, CTRL_BAR_HDRLEN); + if (!ndo->ndo_eflag) + ND_PRINT(" RA:%s TA:%s CTL(%x) SEQ(%u) ", + GET_ETHERADDR_STRING(((const struct ctrl_bar_hdr_t *)p)->ra), + GET_ETHERADDR_STRING(((const struct ctrl_bar_hdr_t *)p)->ta), + GET_LE_U_2(((const struct ctrl_bar_hdr_t *)p)->ctl), + GET_LE_U_2(((const struct ctrl_bar_hdr_t *)p)->seq)); + break; + case CTRL_BA: + ND_TCHECK_LEN(p, CTRL_BA_HDRLEN); + if (!ndo->ndo_eflag) + ND_PRINT(" RA:%s ", + GET_ETHERADDR_STRING(((const struct ctrl_ba_hdr_t *)p)->ra)); + break; + case CTRL_PS_POLL: + ND_TCHECK_LEN(p, CTRL_PS_POLL_HDRLEN); + ND_PRINT(" AID(%x)", + GET_LE_U_2(((const struct ctrl_ps_poll_hdr_t *)p)->aid)); + break; + case CTRL_RTS: + ND_TCHECK_LEN(p, CTRL_RTS_HDRLEN); + if (!ndo->ndo_eflag) + ND_PRINT(" TA:%s ", + GET_ETHERADDR_STRING(((const struct ctrl_rts_hdr_t *)p)->ta)); + break; + case CTRL_CTS: + ND_TCHECK_LEN(p, CTRL_CTS_HDRLEN); + if (!ndo->ndo_eflag) + ND_PRINT(" RA:%s ", + GET_ETHERADDR_STRING(((const struct ctrl_cts_hdr_t *)p)->ra)); + break; + case CTRL_ACK: + ND_TCHECK_LEN(p, CTRL_ACK_HDRLEN); + if (!ndo->ndo_eflag) + ND_PRINT(" RA:%s ", + GET_ETHERADDR_STRING(((const struct ctrl_ack_hdr_t *)p)->ra)); + break; + case CTRL_CF_END: + ND_TCHECK_LEN(p, CTRL_END_HDRLEN); + if (!ndo->ndo_eflag) + ND_PRINT(" RA:%s ", + GET_ETHERADDR_STRING(((const struct ctrl_end_hdr_t *)p)->ra)); + break; + case CTRL_END_ACK: + ND_TCHECK_LEN(p, CTRL_END_ACK_HDRLEN); + if (!ndo->ndo_eflag) + ND_PRINT(" RA:%s ", + GET_ETHERADDR_STRING(((const struct ctrl_end_ack_hdr_t *)p)->ra)); + break; + } + return 1; +trunc: + return 0; +} + +/* + * Data Frame - Address field contents + * + * To Ds | From DS | Addr 1 | Addr 2 | Addr 3 | Addr 4 + * 0 | 0 | DA | SA | BSSID | n/a + * 0 | 1 | DA | BSSID | SA | n/a + * 1 | 0 | BSSID | SA | DA | n/a + * 1 | 1 | RA | TA | DA | SA + */ + +/* + * Function to get source and destination MAC addresses for a data frame. + */ +static void +get_data_src_dst_mac(uint16_t fc, const u_char *p, const uint8_t **srcp, + const uint8_t **dstp) +{ +#define ADDR1 (p + 4) +#define ADDR2 (p + 10) +#define ADDR3 (p + 16) +#define ADDR4 (p + 24) + + if (!FC_TO_DS(fc)) { + if (!FC_FROM_DS(fc)) { + /* not To DS and not From DS */ + *srcp = ADDR2; + *dstp = ADDR1; + } else { + /* not To DS and From DS */ + *srcp = ADDR3; + *dstp = ADDR1; + } + } else { + if (!FC_FROM_DS(fc)) { + /* To DS and not From DS */ + *srcp = ADDR2; + *dstp = ADDR3; + } else { + /* To DS and From DS */ + *srcp = ADDR4; + *dstp = ADDR3; + } + } + +#undef ADDR1 +#undef ADDR2 +#undef ADDR3 +#undef ADDR4 +} + +static void +get_mgmt_src_dst_mac(const u_char *p, const uint8_t **srcp, const uint8_t **dstp) +{ + const struct mgmt_header_t *hp = (const struct mgmt_header_t *) p; + + if (srcp != NULL) + *srcp = hp->sa; + if (dstp != NULL) + *dstp = hp->da; +} + +/* + * Print Header funcs + */ + +static void +data_header_print(netdissect_options *ndo, uint16_t fc, const u_char *p) +{ + u_int subtype = FC_SUBTYPE(fc); + + if (DATA_FRAME_IS_CF_ACK(subtype) || DATA_FRAME_IS_CF_POLL(subtype) || + DATA_FRAME_IS_QOS(subtype)) { + ND_PRINT("CF "); + if (DATA_FRAME_IS_CF_ACK(subtype)) { + if (DATA_FRAME_IS_CF_POLL(subtype)) + ND_PRINT("Ack/Poll"); + else + ND_PRINT("Ack"); + } else { + if (DATA_FRAME_IS_CF_POLL(subtype)) + ND_PRINT("Poll"); + } + if (DATA_FRAME_IS_QOS(subtype)) + ND_PRINT("+QoS"); + ND_PRINT(" "); + } + +#define ADDR1 (p + 4) +#define ADDR2 (p + 10) +#define ADDR3 (p + 16) +#define ADDR4 (p + 24) + + if (!FC_TO_DS(fc) && !FC_FROM_DS(fc)) { + ND_PRINT("DA:%s SA:%s BSSID:%s ", + GET_ETHERADDR_STRING(ADDR1), GET_ETHERADDR_STRING(ADDR2), + GET_ETHERADDR_STRING(ADDR3)); + } else if (!FC_TO_DS(fc) && FC_FROM_DS(fc)) { + ND_PRINT("DA:%s BSSID:%s SA:%s ", + GET_ETHERADDR_STRING(ADDR1), GET_ETHERADDR_STRING(ADDR2), + GET_ETHERADDR_STRING(ADDR3)); + } else if (FC_TO_DS(fc) && !FC_FROM_DS(fc)) { + ND_PRINT("BSSID:%s SA:%s DA:%s ", + GET_ETHERADDR_STRING(ADDR1), GET_ETHERADDR_STRING(ADDR2), + GET_ETHERADDR_STRING(ADDR3)); + } else if (FC_TO_DS(fc) && FC_FROM_DS(fc)) { + ND_PRINT("RA:%s TA:%s DA:%s SA:%s ", + GET_ETHERADDR_STRING(ADDR1), GET_ETHERADDR_STRING(ADDR2), + GET_ETHERADDR_STRING(ADDR3), GET_ETHERADDR_STRING(ADDR4)); + } + +#undef ADDR1 +#undef ADDR2 +#undef ADDR3 +#undef ADDR4 +} + +static void +mgmt_header_print(netdissect_options *ndo, const u_char *p) +{ + const struct mgmt_header_t *hp = (const struct mgmt_header_t *) p; + + ND_PRINT("BSSID:%s DA:%s SA:%s ", + GET_ETHERADDR_STRING((hp)->bssid), GET_ETHERADDR_STRING((hp)->da), + GET_ETHERADDR_STRING((hp)->sa)); +} + +static void +ctrl_header_print(netdissect_options *ndo, uint16_t fc, const u_char *p) +{ + switch (FC_SUBTYPE(fc)) { + case CTRL_BAR: + ND_PRINT(" RA:%s TA:%s CTL(%x) SEQ(%u) ", + GET_ETHERADDR_STRING(((const struct ctrl_bar_hdr_t *)p)->ra), + GET_ETHERADDR_STRING(((const struct ctrl_bar_hdr_t *)p)->ta), + GET_LE_U_2(((const struct ctrl_bar_hdr_t *)p)->ctl), + GET_LE_U_2(((const struct ctrl_bar_hdr_t *)p)->seq)); + break; + case CTRL_BA: + ND_PRINT("RA:%s ", + GET_ETHERADDR_STRING(((const struct ctrl_ba_hdr_t *)p)->ra)); + break; + case CTRL_PS_POLL: + ND_PRINT("BSSID:%s TA:%s ", + GET_ETHERADDR_STRING(((const struct ctrl_ps_poll_hdr_t *)p)->bssid), + GET_ETHERADDR_STRING(((const struct ctrl_ps_poll_hdr_t *)p)->ta)); + break; + case CTRL_RTS: + ND_PRINT("RA:%s TA:%s ", + GET_ETHERADDR_STRING(((const struct ctrl_rts_hdr_t *)p)->ra), + GET_ETHERADDR_STRING(((const struct ctrl_rts_hdr_t *)p)->ta)); + break; + case CTRL_CTS: + ND_PRINT("RA:%s ", + GET_ETHERADDR_STRING(((const struct ctrl_cts_hdr_t *)p)->ra)); + break; + case CTRL_ACK: + ND_PRINT("RA:%s ", + GET_ETHERADDR_STRING(((const struct ctrl_ack_hdr_t *)p)->ra)); + break; + case CTRL_CF_END: + ND_PRINT("RA:%s BSSID:%s ", + GET_ETHERADDR_STRING(((const struct ctrl_end_hdr_t *)p)->ra), + GET_ETHERADDR_STRING(((const struct ctrl_end_hdr_t *)p)->bssid)); + break; + case CTRL_END_ACK: + ND_PRINT("RA:%s BSSID:%s ", + GET_ETHERADDR_STRING(((const struct ctrl_end_ack_hdr_t *)p)->ra), + GET_ETHERADDR_STRING(((const struct ctrl_end_ack_hdr_t *)p)->bssid)); + break; + default: + /* We shouldn't get here - we should already have quit */ + break; + } +} + +static int +extract_header_length(netdissect_options *ndo, + uint16_t fc) +{ + int len; + + switch (FC_TYPE(fc)) { + case T_MGMT: + return MGMT_HDRLEN; + case T_CTRL: + switch (FC_SUBTYPE(fc)) { + case CTRL_CONTROL_WRAPPER: + return CTRL_CONTROL_WRAPPER_HDRLEN; + case CTRL_BAR: + return CTRL_BAR_HDRLEN; + case CTRL_BA: + return CTRL_BA_HDRLEN; + case CTRL_PS_POLL: + return CTRL_PS_POLL_HDRLEN; + case CTRL_RTS: + return CTRL_RTS_HDRLEN; + case CTRL_CTS: + return CTRL_CTS_HDRLEN; + case CTRL_ACK: + return CTRL_ACK_HDRLEN; + case CTRL_CF_END: + return CTRL_END_HDRLEN; + case CTRL_END_ACK: + return CTRL_END_ACK_HDRLEN; + default: + ND_PRINT("unknown 802.11 ctrl frame subtype (%u)", FC_SUBTYPE(fc)); + return 0; + } + case T_DATA: + len = (FC_TO_DS(fc) && FC_FROM_DS(fc)) ? 30 : 24; + if (DATA_FRAME_IS_QOS(FC_SUBTYPE(fc))) + len += 2; + return len; + default: + ND_PRINT("unknown 802.11 frame type (%u)", FC_TYPE(fc)); + return 0; + } +} + +static int +extract_mesh_header_length(netdissect_options *ndo, const u_char *p) +{ + return (GET_U_1(p) &~ 3) ? 0 : 6*(1 + (GET_U_1(p) & 3)); +} + +/* + * Print the 802.11 MAC header. + */ +static void +ieee_802_11_hdr_print(netdissect_options *ndo, + uint16_t fc, const u_char *p, u_int hdrlen, + u_int meshdrlen) +{ + if (ndo->ndo_vflag) { + if (FC_MORE_DATA(fc)) + ND_PRINT("More Data "); + if (FC_MORE_FLAG(fc)) + ND_PRINT("More Fragments "); + if (FC_POWER_MGMT(fc)) + ND_PRINT("Pwr Mgmt "); + if (FC_RETRY(fc)) + ND_PRINT("Retry "); + if (FC_ORDER(fc)) + ND_PRINT("Strictly Ordered "); + if (FC_PROTECTED(fc)) + ND_PRINT("Protected "); + if (FC_TYPE(fc) != T_CTRL || FC_SUBTYPE(fc) != CTRL_PS_POLL) + ND_PRINT("%uus ", + GET_LE_U_2(((const struct mgmt_header_t *)p)->duration)); + } + if (meshdrlen != 0) { + const struct meshcntl_t *mc = + (const struct meshcntl_t *)(p + hdrlen - meshdrlen); + u_int ae = GET_U_1(mc->flags) & 3; + + ND_PRINT("MeshData (AE %u TTL %u seq %u", ae, + GET_U_1(mc->ttl), GET_LE_U_4(mc->seq)); + if (ae > 0) + ND_PRINT(" A4:%s", GET_ETHERADDR_STRING(mc->addr4)); + if (ae > 1) + ND_PRINT(" A5:%s", GET_ETHERADDR_STRING(mc->addr5)); + if (ae > 2) + ND_PRINT(" A6:%s", GET_ETHERADDR_STRING(mc->addr6)); + ND_PRINT(") "); + } + + switch (FC_TYPE(fc)) { + case T_MGMT: + mgmt_header_print(ndo, p); + break; + case T_CTRL: + ctrl_header_print(ndo, fc, p); + break; + case T_DATA: + data_header_print(ndo, fc, p); + break; + default: + break; + } +} + +static u_int +ieee802_11_print(netdissect_options *ndo, + const u_char *p, u_int length, u_int orig_caplen, int pad, + u_int fcslen) +{ + uint16_t fc; + u_int caplen, hdrlen, meshdrlen; + struct lladdr_info src, dst; + int llc_hdrlen; + + ndo->ndo_protocol = "802.11"; + caplen = orig_caplen; + /* Remove FCS, if present */ + if (length < fcslen) { + nd_print_trunc(ndo); + return caplen; + } + length -= fcslen; + if (caplen > length) { + /* Amount of FCS in actual packet data, if any */ + fcslen = caplen - length; + caplen -= fcslen; + ndo->ndo_snapend -= fcslen; + } + + if (caplen < IEEE802_11_FC_LEN) { + nd_print_trunc(ndo); + return orig_caplen; + } + + fc = GET_LE_U_2(p); + hdrlen = extract_header_length(ndo, fc); + if (hdrlen == 0) { + /* Unknown frame type or control frame subtype; quit. */ + return (0); + } + if (pad) + hdrlen = roundup2(hdrlen, 4); + if (ndo->ndo_Hflag && FC_TYPE(fc) == T_DATA && + DATA_FRAME_IS_QOS(FC_SUBTYPE(fc))) { + if(!ND_TTEST_1(p + hdrlen)) { + nd_print_trunc(ndo); + return hdrlen; + } + meshdrlen = extract_mesh_header_length(ndo, p + hdrlen); + hdrlen += meshdrlen; + } else + meshdrlen = 0; + + if (caplen < hdrlen) { + nd_print_trunc(ndo); + return hdrlen; + } + + if (ndo->ndo_eflag) + ieee_802_11_hdr_print(ndo, fc, p, hdrlen, meshdrlen); + + /* + * Go past the 802.11 header. + */ + length -= hdrlen; + caplen -= hdrlen; + p += hdrlen; + + src.addr_string = etheraddr_string; + dst.addr_string = etheraddr_string; + switch (FC_TYPE(fc)) { + case T_MGMT: + get_mgmt_src_dst_mac(p - hdrlen, &src.addr, &dst.addr); + if (!mgmt_body_print(ndo, fc, src.addr, p, length)) { + nd_print_trunc(ndo); + return hdrlen; + } + break; + case T_CTRL: + if (!ctrl_body_print(ndo, fc, p - hdrlen)) { + nd_print_trunc(ndo); + return hdrlen; + } + break; + case T_DATA: + if (DATA_FRAME_IS_NULL(FC_SUBTYPE(fc))) + return hdrlen; /* no-data frame */ + /* There may be a problem w/ AP not having this bit set */ + if (FC_PROTECTED(fc)) { + ND_PRINT("Data"); + if (!wep_print(ndo, p)) { + nd_print_trunc(ndo); + return hdrlen; + } + } else { + get_data_src_dst_mac(fc, p - hdrlen, &src.addr, &dst.addr); + llc_hdrlen = llc_print(ndo, p, length, caplen, &src, &dst); + if (llc_hdrlen < 0) { + /* + * Some kinds of LLC packet we cannot + * handle intelligently + */ + if (!ndo->ndo_suppress_default_print) + ND_DEFAULTPRINT(p, caplen); + llc_hdrlen = -llc_hdrlen; + } + hdrlen += llc_hdrlen; + } + break; + default: + /* We shouldn't get here - we should already have quit */ + break; + } + + return hdrlen; +} + +/* + * This is the top level routine of the printer. 'p' points + * to the 802.11 header of the packet, 'h->ts' is the timestamp, + * 'h->len' is the length of the packet off the wire, and 'h->caplen' + * is the number of bytes actually captured. + */ +void +ieee802_11_if_print(netdissect_options *ndo, + const struct pcap_pkthdr *h, const u_char *p) +{ + ndo->ndo_protocol = "802.11"; + ndo->ndo_ll_hdr_len += ieee802_11_print(ndo, p, h->len, h->caplen, 0, 0); +} + + +/* $FreeBSD: src/sys/net80211/ieee80211_radiotap.h,v 1.5 2005/01/22 20:12:05 sam Exp $ */ +/* NetBSD: ieee802_11_radio.h,v 1.2 2006/02/26 03:04:03 dyoung Exp */ + +/*- + * Copyright (c) 2003, 2004 David Young. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of David Young may not be used to endorse or promote + * products derived from this software without specific prior + * written permission. + * + * THIS SOFTWARE IS PROVIDED BY DAVID YOUNG ``AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, + * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A + * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DAVID + * YOUNG BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + */ + +/* A generic radio capture format is desirable. It must be + * rigidly defined (e.g., units for fields should be given), + * and easily extensible. + * + * The following is an extensible radio capture format. It is + * based on a bitmap indicating which fields are present. + * + * I am trying to describe precisely what the application programmer + * should expect in the following, and for that reason I tell the + * units and origin of each measurement (where it applies), or else I + * use sufficiently weaselly language ("is a monotonically nondecreasing + * function of...") that I cannot set false expectations for lawyerly + * readers. + */ + +/* + * The radio capture header precedes the 802.11 header. + * + * Note well: all radiotap fields are little-endian. + */ +struct ieee80211_radiotap_header { + nd_uint8_t it_version; /* Version 0. Only increases + * for drastic changes, + * introduction of compatible + * new fields does not count. + */ + nd_uint8_t it_pad; + nd_uint16_t it_len; /* length of the whole + * header in bytes, including + * it_version, it_pad, + * it_len, and data fields. + */ + nd_uint32_t it_present; /* A bitmap telling which + * fields are present. Set bit 31 + * (0x80000000) to extend the + * bitmap by another 32 bits. + * Additional extensions are made + * by setting bit 31. + */ +}; + +/* Name Data type Units + * ---- --------- ----- + * + * IEEE80211_RADIOTAP_TSFT uint64_t microseconds + * + * Value in microseconds of the MAC's 64-bit 802.11 Time + * Synchronization Function timer when the first bit of the + * MPDU arrived at the MAC. For received frames, only. + * + * IEEE80211_RADIOTAP_CHANNEL 2 x uint16_t MHz, bitmap + * + * Tx/Rx frequency in MHz, followed by flags (see below). + * Note that IEEE80211_RADIOTAP_XCHANNEL must be used to + * represent an HT channel as there is not enough room in + * the flags word. + * + * IEEE80211_RADIOTAP_FHSS uint16_t see below + * + * For frequency-hopping radios, the hop set (first byte) + * and pattern (second byte). + * + * IEEE80211_RADIOTAP_RATE uint8_t 500kb/s or index + * + * Tx/Rx data rate. If bit 0x80 is set then it represents an + * an MCS index and not an IEEE rate. + * + * IEEE80211_RADIOTAP_DBM_ANTSIGNAL int8_t decibels from + * one milliwatt (dBm) + * + * RF signal power at the antenna, decibel difference from + * one milliwatt. + * + * IEEE80211_RADIOTAP_DBM_ANTNOISE int8_t decibels from + * one milliwatt (dBm) + * + * RF noise power at the antenna, decibel difference from one + * milliwatt. + * + * IEEE80211_RADIOTAP_DB_ANTSIGNAL uint8_t decibel (dB) + * + * RF signal power at the antenna, decibel difference from an + * arbitrary, fixed reference. + * + * IEEE80211_RADIOTAP_DB_ANTNOISE uint8_t decibel (dB) + * + * RF noise power at the antenna, decibel difference from an + * arbitrary, fixed reference point. + * + * IEEE80211_RADIOTAP_LOCK_QUALITY uint16_t unitless + * + * Quality of Barker code lock. Unitless. Monotonically + * nondecreasing with "better" lock strength. Called "Signal + * Quality" in datasheets. (Is there a standard way to measure + * this?) + * + * IEEE80211_RADIOTAP_TX_ATTENUATION uint16_t unitless + * + * Transmit power expressed as unitless distance from max + * power set at factory calibration. 0 is max power. + * Monotonically nondecreasing with lower power levels. + * + * IEEE80211_RADIOTAP_DB_TX_ATTENUATION uint16_t decibels (dB) + * + * Transmit power expressed as decibel distance from max power + * set at factory calibration. 0 is max power. Monotonically + * nondecreasing with lower power levels. + * + * IEEE80211_RADIOTAP_DBM_TX_POWER int8_t decibels from + * one milliwatt (dBm) + * + * Transmit power expressed as dBm (decibels from a 1 milliwatt + * reference). This is the absolute power level measured at + * the antenna port. + * + * IEEE80211_RADIOTAP_FLAGS uint8_t bitmap + * + * Properties of transmitted and received frames. See flags + * defined below. + * + * IEEE80211_RADIOTAP_ANTENNA uint8_t antenna index + * + * Unitless indication of the Rx/Tx antenna for this packet. + * The first antenna is antenna 0. + * + * IEEE80211_RADIOTAP_RX_FLAGS uint16_t bitmap + * + * Properties of received frames. See flags defined below. + * + * IEEE80211_RADIOTAP_XCHANNEL uint32_t bitmap + * uint16_t MHz + * uint8_t channel number + * uint8_t .5 dBm + * + * Extended channel specification: flags (see below) followed by + * frequency in MHz, the corresponding IEEE channel number, and + * finally the maximum regulatory transmit power cap in .5 dBm + * units. This property supersedes IEEE80211_RADIOTAP_CHANNEL + * and only one of the two should be present. + * + * IEEE80211_RADIOTAP_MCS uint8_t known + * uint8_t flags + * uint8_t mcs + * + * Bitset indicating which fields have known values, followed + * by bitset of flag values, followed by the MCS rate index as + * in IEEE 802.11n. + * + * + * IEEE80211_RADIOTAP_AMPDU_STATUS u32, u16, u8, u8 unitless + * + * Contains the AMPDU information for the subframe. + * + * IEEE80211_RADIOTAP_VHT u16, u8, u8, u8[4], u8, u8, u16 + * + * Contains VHT information about this frame. + * + * IEEE80211_RADIOTAP_VENDOR_NAMESPACE + * uint8_t OUI[3] + * uint8_t subspace + * uint16_t length + * + * The Vendor Namespace Field contains three sub-fields. The first + * sub-field is 3 bytes long. It contains the vendor's IEEE 802 + * Organizationally Unique Identifier (OUI). The fourth byte is a + * vendor-specific "namespace selector." + * + */ +enum ieee80211_radiotap_type { + IEEE80211_RADIOTAP_TSFT = 0, + IEEE80211_RADIOTAP_FLAGS = 1, + IEEE80211_RADIOTAP_RATE = 2, + IEEE80211_RADIOTAP_CHANNEL = 3, + IEEE80211_RADIOTAP_FHSS = 4, + IEEE80211_RADIOTAP_DBM_ANTSIGNAL = 5, + IEEE80211_RADIOTAP_DBM_ANTNOISE = 6, + IEEE80211_RADIOTAP_LOCK_QUALITY = 7, + IEEE80211_RADIOTAP_TX_ATTENUATION = 8, + IEEE80211_RADIOTAP_DB_TX_ATTENUATION = 9, + IEEE80211_RADIOTAP_DBM_TX_POWER = 10, + IEEE80211_RADIOTAP_ANTENNA = 11, + IEEE80211_RADIOTAP_DB_ANTSIGNAL = 12, + IEEE80211_RADIOTAP_DB_ANTNOISE = 13, + IEEE80211_RADIOTAP_RX_FLAGS = 14, + /* NB: gap for netbsd definitions */ + IEEE80211_RADIOTAP_XCHANNEL = 18, + IEEE80211_RADIOTAP_MCS = 19, + IEEE80211_RADIOTAP_AMPDU_STATUS = 20, + IEEE80211_RADIOTAP_VHT = 21, + IEEE80211_RADIOTAP_NAMESPACE = 29, + IEEE80211_RADIOTAP_VENDOR_NAMESPACE = 30, + IEEE80211_RADIOTAP_EXT = 31 +}; + +/* channel attributes */ +#define IEEE80211_CHAN_TURBO 0x00010 /* Turbo channel */ +#define IEEE80211_CHAN_CCK 0x00020 /* CCK channel */ +#define IEEE80211_CHAN_OFDM 0x00040 /* OFDM channel */ +#define IEEE80211_CHAN_2GHZ 0x00080 /* 2 GHz spectrum channel. */ +#define IEEE80211_CHAN_5GHZ 0x00100 /* 5 GHz spectrum channel */ +#define IEEE80211_CHAN_PASSIVE 0x00200 /* Only passive scan allowed */ +#define IEEE80211_CHAN_DYN 0x00400 /* Dynamic CCK-OFDM channel */ +#define IEEE80211_CHAN_GFSK 0x00800 /* GFSK channel (FHSS PHY) */ +#define IEEE80211_CHAN_GSM 0x01000 /* 900 MHz spectrum channel */ +#define IEEE80211_CHAN_STURBO 0x02000 /* 11a static turbo channel only */ +#define IEEE80211_CHAN_HALF 0x04000 /* Half rate channel */ +#define IEEE80211_CHAN_QUARTER 0x08000 /* Quarter rate channel */ +#define IEEE80211_CHAN_HT20 0x10000 /* HT 20 channel */ +#define IEEE80211_CHAN_HT40U 0x20000 /* HT 40 channel w/ ext above */ +#define IEEE80211_CHAN_HT40D 0x40000 /* HT 40 channel w/ ext below */ + +/* Useful combinations of channel characteristics, borrowed from Ethereal */ +#define IEEE80211_CHAN_A \ + (IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_OFDM) +#define IEEE80211_CHAN_B \ + (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_CCK) +#define IEEE80211_CHAN_G \ + (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_DYN) +#define IEEE80211_CHAN_TA \ + (IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_OFDM | IEEE80211_CHAN_TURBO) +#define IEEE80211_CHAN_TG \ + (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_DYN | IEEE80211_CHAN_TURBO) + + +/* For IEEE80211_RADIOTAP_FLAGS */ +#define IEEE80211_RADIOTAP_F_CFP 0x01 /* sent/received + * during CFP + */ +#define IEEE80211_RADIOTAP_F_SHORTPRE 0x02 /* sent/received + * with short + * preamble + */ +#define IEEE80211_RADIOTAP_F_WEP 0x04 /* sent/received + * with WEP encryption + */ +#define IEEE80211_RADIOTAP_F_FRAG 0x08 /* sent/received + * with fragmentation + */ +#define IEEE80211_RADIOTAP_F_FCS 0x10 /* frame includes FCS */ +#define IEEE80211_RADIOTAP_F_DATAPAD 0x20 /* frame has padding between + * 802.11 header and payload + * (to 32-bit boundary) + */ +#define IEEE80211_RADIOTAP_F_BADFCS 0x40 /* does not pass FCS check */ + +/* For IEEE80211_RADIOTAP_RX_FLAGS */ +#define IEEE80211_RADIOTAP_F_RX_BADFCS 0x0001 /* frame failed crc check */ +#define IEEE80211_RADIOTAP_F_RX_PLCP_CRC 0x0002 /* frame failed PLCP CRC check */ + +/* For IEEE80211_RADIOTAP_MCS known */ +#define IEEE80211_RADIOTAP_MCS_BANDWIDTH_KNOWN 0x01 +#define IEEE80211_RADIOTAP_MCS_MCS_INDEX_KNOWN 0x02 /* MCS index field */ +#define IEEE80211_RADIOTAP_MCS_GUARD_INTERVAL_KNOWN 0x04 +#define IEEE80211_RADIOTAP_MCS_HT_FORMAT_KNOWN 0x08 +#define IEEE80211_RADIOTAP_MCS_FEC_TYPE_KNOWN 0x10 +#define IEEE80211_RADIOTAP_MCS_STBC_KNOWN 0x20 +#define IEEE80211_RADIOTAP_MCS_NESS_KNOWN 0x40 +#define IEEE80211_RADIOTAP_MCS_NESS_BIT_1 0x80 + +/* For IEEE80211_RADIOTAP_MCS flags */ +#define IEEE80211_RADIOTAP_MCS_BANDWIDTH_MASK 0x03 +#define IEEE80211_RADIOTAP_MCS_BANDWIDTH_20 0 +#define IEEE80211_RADIOTAP_MCS_BANDWIDTH_40 1 +#define IEEE80211_RADIOTAP_MCS_BANDWIDTH_20L 2 +#define IEEE80211_RADIOTAP_MCS_BANDWIDTH_20U 3 +#define IEEE80211_RADIOTAP_MCS_SHORT_GI 0x04 /* short guard interval */ +#define IEEE80211_RADIOTAP_MCS_HT_GREENFIELD 0x08 +#define IEEE80211_RADIOTAP_MCS_FEC_LDPC 0x10 +#define IEEE80211_RADIOTAP_MCS_STBC_MASK 0x60 +#define IEEE80211_RADIOTAP_MCS_STBC_1 1 +#define IEEE80211_RADIOTAP_MCS_STBC_2 2 +#define IEEE80211_RADIOTAP_MCS_STBC_3 3 +#define IEEE80211_RADIOTAP_MCS_STBC_SHIFT 5 +#define IEEE80211_RADIOTAP_MCS_NESS_BIT_0 0x80 + +/* For IEEE80211_RADIOTAP_AMPDU_STATUS */ +#define IEEE80211_RADIOTAP_AMPDU_REPORT_ZEROLEN 0x0001 +#define IEEE80211_RADIOTAP_AMPDU_IS_ZEROLEN 0x0002 +#define IEEE80211_RADIOTAP_AMPDU_LAST_KNOWN 0x0004 +#define IEEE80211_RADIOTAP_AMPDU_IS_LAST 0x0008 +#define IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_ERR 0x0010 +#define IEEE80211_RADIOTAP_AMPDU_DELIM_CRC_KNOWN 0x0020 + +/* For IEEE80211_RADIOTAP_VHT known */ +#define IEEE80211_RADIOTAP_VHT_STBC_KNOWN 0x0001 +#define IEEE80211_RADIOTAP_VHT_TXOP_PS_NA_KNOWN 0x0002 +#define IEEE80211_RADIOTAP_VHT_GUARD_INTERVAL_KNOWN 0x0004 +#define IEEE80211_RADIOTAP_VHT_SGI_NSYM_DIS_KNOWN 0x0008 +#define IEEE80211_RADIOTAP_VHT_LDPC_EXTRA_OFDM_SYM_KNOWN 0x0010 +#define IEEE80211_RADIOTAP_VHT_BEAMFORMED_KNOWN 0x0020 +#define IEEE80211_RADIOTAP_VHT_BANDWIDTH_KNOWN 0x0040 +#define IEEE80211_RADIOTAP_VHT_GROUP_ID_KNOWN 0x0080 +#define IEEE80211_RADIOTAP_VHT_PARTIAL_AID_KNOWN 0x0100 + +/* For IEEE80211_RADIOTAP_VHT flags */ +#define IEEE80211_RADIOTAP_VHT_STBC 0x01 +#define IEEE80211_RADIOTAP_VHT_TXOP_PS_NA 0x02 +#define IEEE80211_RADIOTAP_VHT_SHORT_GI 0x04 +#define IEEE80211_RADIOTAP_VHT_SGI_NSYM_M10_9 0x08 +#define IEEE80211_RADIOTAP_VHT_LDPC_EXTRA_OFDM_SYM 0x10 +#define IEEE80211_RADIOTAP_VHT_BEAMFORMED 0x20 + +#define IEEE80211_RADIOTAP_VHT_BANDWIDTH_MASK 0x1f + +#define IEEE80211_RADIOTAP_VHT_NSS_MASK 0x0f +#define IEEE80211_RADIOTAP_VHT_MCS_MASK 0xf0 +#define IEEE80211_RADIOTAP_VHT_MCS_SHIFT 4 + +#define IEEE80211_RADIOTAP_CODING_LDPC_USERn 0x01 + +#define IEEE80211_CHAN_FHSS \ + (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_GFSK) +#define IEEE80211_CHAN_A \ + (IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_OFDM) +#define IEEE80211_CHAN_B \ + (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_CCK) +#define IEEE80211_CHAN_PUREG \ + (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_OFDM) +#define IEEE80211_CHAN_G \ + (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_DYN) + +#define IS_CHAN_FHSS(flags) \ + ((flags & IEEE80211_CHAN_FHSS) == IEEE80211_CHAN_FHSS) +#define IS_CHAN_A(flags) \ + ((flags & IEEE80211_CHAN_A) == IEEE80211_CHAN_A) +#define IS_CHAN_B(flags) \ + ((flags & IEEE80211_CHAN_B) == IEEE80211_CHAN_B) +#define IS_CHAN_PUREG(flags) \ + ((flags & IEEE80211_CHAN_PUREG) == IEEE80211_CHAN_PUREG) +#define IS_CHAN_G(flags) \ + ((flags & IEEE80211_CHAN_G) == IEEE80211_CHAN_G) +#define IS_CHAN_ANYG(flags) \ + (IS_CHAN_PUREG(flags) || IS_CHAN_G(flags)) + +static void +print_chaninfo(netdissect_options *ndo, + uint16_t freq, uint32_t flags, uint32_t presentflags) +{ + ND_PRINT("%u MHz", freq); + if (presentflags & (1 << IEEE80211_RADIOTAP_MCS)) { + /* + * We have the MCS field, so this is 11n, regardless + * of what the channel flags say. + */ + ND_PRINT(" 11n"); + } else { + if (IS_CHAN_FHSS(flags)) + ND_PRINT(" FHSS"); + if (IS_CHAN_A(flags)) { + if (flags & IEEE80211_CHAN_HALF) + ND_PRINT(" 11a/10Mhz"); + else if (flags & IEEE80211_CHAN_QUARTER) + ND_PRINT(" 11a/5Mhz"); + else + ND_PRINT(" 11a"); + } + if (IS_CHAN_ANYG(flags)) { + if (flags & IEEE80211_CHAN_HALF) + ND_PRINT(" 11g/10Mhz"); + else if (flags & IEEE80211_CHAN_QUARTER) + ND_PRINT(" 11g/5Mhz"); + else + ND_PRINT(" 11g"); + } else if (IS_CHAN_B(flags)) + ND_PRINT(" 11b"); + if (flags & IEEE80211_CHAN_TURBO) + ND_PRINT(" Turbo"); + } + /* + * These apply to 11n. + */ + if (flags & IEEE80211_CHAN_HT20) + ND_PRINT(" ht/20"); + else if (flags & IEEE80211_CHAN_HT40D) + ND_PRINT(" ht/40-"); + else if (flags & IEEE80211_CHAN_HT40U) + ND_PRINT(" ht/40+"); + ND_PRINT(" "); +} + +static int +print_radiotap_field(netdissect_options *ndo, + struct cpack_state *s, uint32_t bit, uint8_t *flagsp, + uint32_t presentflags) +{ + u_int i; + int rc; + + switch (bit) { + + case IEEE80211_RADIOTAP_TSFT: { + uint64_t tsft; + + rc = nd_cpack_uint64(ndo, s, &tsft); + if (rc != 0) + goto trunc; + ND_PRINT("%" PRIu64 "us tsft ", tsft); + break; + } + + case IEEE80211_RADIOTAP_FLAGS: { + uint8_t flagsval; + + rc = nd_cpack_uint8(ndo, s, &flagsval); + if (rc != 0) + goto trunc; + *flagsp = flagsval; + if (flagsval & IEEE80211_RADIOTAP_F_CFP) + ND_PRINT("cfp "); + if (flagsval & IEEE80211_RADIOTAP_F_SHORTPRE) + ND_PRINT("short preamble "); + if (flagsval & IEEE80211_RADIOTAP_F_WEP) + ND_PRINT("wep "); + if (flagsval & IEEE80211_RADIOTAP_F_FRAG) + ND_PRINT("fragmented "); + if (flagsval & IEEE80211_RADIOTAP_F_BADFCS) + ND_PRINT("bad-fcs "); + break; + } + + case IEEE80211_RADIOTAP_RATE: { + uint8_t rate; + + rc = nd_cpack_uint8(ndo, s, &rate); + if (rc != 0) + goto trunc; + /* + * XXX On FreeBSD rate & 0x80 means we have an MCS. On + * Linux and AirPcap it does not. (What about + * macOS, NetBSD, OpenBSD, and DragonFly BSD?) + * + * This is an issue either for proprietary extensions + * to 11a or 11g, which do exist, or for 11n + * implementations that stuff a rate value into + * this field, which also appear to exist. + * + * We currently handle that by assuming that + * if the 0x80 bit is set *and* the remaining + * bits have a value between 0 and 15 it's + * an MCS value, otherwise it's a rate. If + * there are cases where systems that use + * "0x80 + MCS index" for MCS indices > 15, + * or stuff a rate value here between 64 and + * 71.5 Mb/s in here, we'll need a preference + * setting. Such rates do exist, e.g. 11n + * MCS 7 at 20 MHz with a long guard interval. + */ + if (rate >= 0x80 && rate <= 0x8f) { + /* + * XXX - we don't know the channel width + * or guard interval length, so we can't + * convert this to a data rate. + * + * If you want us to show a data rate, + * use the MCS field, not the Rate field; + * the MCS field includes not only the + * MCS index, it also includes bandwidth + * and guard interval information. + * + * XXX - can we get the channel width + * from XChannel and the guard interval + * information from Flags, at least on + * FreeBSD? + */ + ND_PRINT("MCS %u ", rate & 0x7f); + } else + ND_PRINT("%2.1f Mb/s ", .5 * rate); + break; + } + + case IEEE80211_RADIOTAP_CHANNEL: { + uint16_t frequency; + uint16_t flags; + + rc = nd_cpack_uint16(ndo, s, &frequency); + if (rc != 0) + goto trunc; + rc = nd_cpack_uint16(ndo, s, &flags); + if (rc != 0) + goto trunc; + /* + * If CHANNEL and XCHANNEL are both present, skip + * CHANNEL. + */ + if (presentflags & (1 << IEEE80211_RADIOTAP_XCHANNEL)) + break; + print_chaninfo(ndo, frequency, flags, presentflags); + break; + } + + case IEEE80211_RADIOTAP_FHSS: { + uint8_t hopset; + uint8_t hoppat; + + rc = nd_cpack_uint8(ndo, s, &hopset); + if (rc != 0) + goto trunc; + rc = nd_cpack_uint8(ndo, s, &hoppat); + if (rc != 0) + goto trunc; + ND_PRINT("fhset %u fhpat %u ", hopset, hoppat); + break; + } + + case IEEE80211_RADIOTAP_DBM_ANTSIGNAL: { + int8_t dbm_antsignal; + + rc = nd_cpack_int8(ndo, s, &dbm_antsignal); + if (rc != 0) + goto trunc; + ND_PRINT("%ddBm signal ", dbm_antsignal); + break; + } + + case IEEE80211_RADIOTAP_DBM_ANTNOISE: { + int8_t dbm_antnoise; + + rc = nd_cpack_int8(ndo, s, &dbm_antnoise); + if (rc != 0) + goto trunc; + ND_PRINT("%ddBm noise ", dbm_antnoise); + break; + } + + case IEEE80211_RADIOTAP_LOCK_QUALITY: { + uint16_t lock_quality; + + rc = nd_cpack_uint16(ndo, s, &lock_quality); + if (rc != 0) + goto trunc; + ND_PRINT("%u sq ", lock_quality); + break; + } + + case IEEE80211_RADIOTAP_TX_ATTENUATION: { + int16_t tx_attenuation; + + rc = nd_cpack_int16(ndo, s, &tx_attenuation); + if (rc != 0) + goto trunc; + ND_PRINT("%d tx power ", -tx_attenuation); + break; + } + + case IEEE80211_RADIOTAP_DB_TX_ATTENUATION: { + int8_t db_tx_attenuation; + + rc = nd_cpack_int8(ndo, s, &db_tx_attenuation); + if (rc != 0) + goto trunc; + ND_PRINT("%ddB tx attenuation ", -db_tx_attenuation); + break; + } + + case IEEE80211_RADIOTAP_DBM_TX_POWER: { + int8_t dbm_tx_power; + + rc = nd_cpack_int8(ndo, s, &dbm_tx_power); + if (rc != 0) + goto trunc; + ND_PRINT("%ddBm tx power ", dbm_tx_power); + break; + } + + case IEEE80211_RADIOTAP_ANTENNA: { + uint8_t antenna; + + rc = nd_cpack_uint8(ndo, s, &antenna); + if (rc != 0) + goto trunc; + ND_PRINT("antenna %u ", antenna); + break; + } + + case IEEE80211_RADIOTAP_DB_ANTSIGNAL: { + uint8_t db_antsignal; + + rc = nd_cpack_uint8(ndo, s, &db_antsignal); + if (rc != 0) + goto trunc; + ND_PRINT("%udB signal ", db_antsignal); + break; + } + + case IEEE80211_RADIOTAP_DB_ANTNOISE: { + uint8_t db_antnoise; + + rc = nd_cpack_uint8(ndo, s, &db_antnoise); + if (rc != 0) + goto trunc; + ND_PRINT("%udB noise ", db_antnoise); + break; + } + + case IEEE80211_RADIOTAP_RX_FLAGS: { + uint16_t rx_flags; + + rc = nd_cpack_uint16(ndo, s, &rx_flags); + if (rc != 0) + goto trunc; + /* Do nothing for now */ + break; + } + + case IEEE80211_RADIOTAP_XCHANNEL: { + uint32_t flags; + uint16_t frequency; + uint8_t channel; + uint8_t maxpower; + + rc = nd_cpack_uint32(ndo, s, &flags); + if (rc != 0) + goto trunc; + rc = nd_cpack_uint16(ndo, s, &frequency); + if (rc != 0) + goto trunc; + rc = nd_cpack_uint8(ndo, s, &channel); + if (rc != 0) + goto trunc; + rc = nd_cpack_uint8(ndo, s, &maxpower); + if (rc != 0) + goto trunc; + print_chaninfo(ndo, frequency, flags, presentflags); + break; + } + + case IEEE80211_RADIOTAP_MCS: { + uint8_t known; + uint8_t flags; + uint8_t mcs_index; + static const char *ht_bandwidth[4] = { + "20 MHz", + "40 MHz", + "20 MHz (L)", + "20 MHz (U)" + }; + float htrate; + + rc = nd_cpack_uint8(ndo, s, &known); + if (rc != 0) + goto trunc; + rc = nd_cpack_uint8(ndo, s, &flags); + if (rc != 0) + goto trunc; + rc = nd_cpack_uint8(ndo, s, &mcs_index); + if (rc != 0) + goto trunc; + if (known & IEEE80211_RADIOTAP_MCS_MCS_INDEX_KNOWN) { + /* + * We know the MCS index. + */ + if (mcs_index <= MAX_MCS_INDEX) { + /* + * And it's in-range. + */ + if (known & (IEEE80211_RADIOTAP_MCS_BANDWIDTH_KNOWN|IEEE80211_RADIOTAP_MCS_GUARD_INTERVAL_KNOWN)) { + /* + * And we know both the bandwidth and + * the guard interval, so we can look + * up the rate. + */ + htrate = + ieee80211_float_htrates + [mcs_index] + [((flags & IEEE80211_RADIOTAP_MCS_BANDWIDTH_MASK) == IEEE80211_RADIOTAP_MCS_BANDWIDTH_40 ? 1 : 0)] + [((flags & IEEE80211_RADIOTAP_MCS_SHORT_GI) ? 1 : 0)]; + } else { + /* + * We don't know both the bandwidth + * and the guard interval, so we can + * only report the MCS index. + */ + htrate = 0.0; + } + } else { + /* + * The MCS value is out of range. + */ + htrate = 0.0; + } + if (htrate != 0.0) { + /* + * We have the rate. + * Print it. + */ + ND_PRINT("%.1f Mb/s MCS %u ", htrate, mcs_index); + } else { + /* + * We at least have the MCS index. + * Print it. + */ + ND_PRINT("MCS %u ", mcs_index); + } + } + if (known & IEEE80211_RADIOTAP_MCS_BANDWIDTH_KNOWN) { + ND_PRINT("%s ", + ht_bandwidth[flags & IEEE80211_RADIOTAP_MCS_BANDWIDTH_MASK]); + } + if (known & IEEE80211_RADIOTAP_MCS_GUARD_INTERVAL_KNOWN) { + ND_PRINT("%s GI ", + (flags & IEEE80211_RADIOTAP_MCS_SHORT_GI) ? + "short" : "long"); + } + if (known & IEEE80211_RADIOTAP_MCS_HT_FORMAT_KNOWN) { + ND_PRINT("%s ", + (flags & IEEE80211_RADIOTAP_MCS_HT_GREENFIELD) ? + "greenfield" : "mixed"); + } + if (known & IEEE80211_RADIOTAP_MCS_FEC_TYPE_KNOWN) { + ND_PRINT("%s FEC ", + (flags & IEEE80211_RADIOTAP_MCS_FEC_LDPC) ? + "LDPC" : "BCC"); + } + if (known & IEEE80211_RADIOTAP_MCS_STBC_KNOWN) { + ND_PRINT("RX-STBC%u ", + (flags & IEEE80211_RADIOTAP_MCS_STBC_MASK) >> IEEE80211_RADIOTAP_MCS_STBC_SHIFT); + } + break; + } + + case IEEE80211_RADIOTAP_AMPDU_STATUS: { + uint32_t reference_num; + uint16_t flags; + uint8_t delim_crc; + uint8_t reserved; + + rc = nd_cpack_uint32(ndo, s, &reference_num); + if (rc != 0) + goto trunc; + rc = nd_cpack_uint16(ndo, s, &flags); + if (rc != 0) + goto trunc; + rc = nd_cpack_uint8(ndo, s, &delim_crc); + if (rc != 0) + goto trunc; + rc = nd_cpack_uint8(ndo, s, &reserved); + if (rc != 0) + goto trunc; + /* Do nothing for now */ + break; + } + + case IEEE80211_RADIOTAP_VHT: { + uint16_t known; + uint8_t flags; + uint8_t bandwidth; + uint8_t mcs_nss[4]; + uint8_t coding; + uint8_t group_id; + uint16_t partial_aid; + static const char *vht_bandwidth[32] = { + "20 MHz", + "40 MHz", + "20 MHz (L)", + "20 MHz (U)", + "80 MHz", + "80 MHz (L)", + "80 MHz (U)", + "80 MHz (LL)", + "80 MHz (LU)", + "80 MHz (UL)", + "80 MHz (UU)", + "160 MHz", + "160 MHz (L)", + "160 MHz (U)", + "160 MHz (LL)", + "160 MHz (LU)", + "160 MHz (UL)", + "160 MHz (UU)", + "160 MHz (LLL)", + "160 MHz (LLU)", + "160 MHz (LUL)", + "160 MHz (UUU)", + "160 MHz (ULL)", + "160 MHz (ULU)", + "160 MHz (UUL)", + "160 MHz (UUU)", + "unknown (26)", + "unknown (27)", + "unknown (28)", + "unknown (29)", + "unknown (30)", + "unknown (31)" + }; + + rc = nd_cpack_uint16(ndo, s, &known); + if (rc != 0) + goto trunc; + rc = nd_cpack_uint8(ndo, s, &flags); + if (rc != 0) + goto trunc; + rc = nd_cpack_uint8(ndo, s, &bandwidth); + if (rc != 0) + goto trunc; + for (i = 0; i < 4; i++) { + rc = nd_cpack_uint8(ndo, s, &mcs_nss[i]); + if (rc != 0) + goto trunc; + } + rc = nd_cpack_uint8(ndo, s, &coding); + if (rc != 0) + goto trunc; + rc = nd_cpack_uint8(ndo, s, &group_id); + if (rc != 0) + goto trunc; + rc = nd_cpack_uint16(ndo, s, &partial_aid); + if (rc != 0) + goto trunc; + for (i = 0; i < 4; i++) { + u_int nss, mcs; + nss = mcs_nss[i] & IEEE80211_RADIOTAP_VHT_NSS_MASK; + mcs = (mcs_nss[i] & IEEE80211_RADIOTAP_VHT_MCS_MASK) >> IEEE80211_RADIOTAP_VHT_MCS_SHIFT; + + if (nss == 0) + continue; + + ND_PRINT("User %u MCS %u ", i, mcs); + ND_PRINT("%s FEC ", + (coding & (IEEE80211_RADIOTAP_CODING_LDPC_USERn << i)) ? + "LDPC" : "BCC"); + } + if (known & IEEE80211_RADIOTAP_VHT_BANDWIDTH_KNOWN) { + ND_PRINT("%s ", + vht_bandwidth[bandwidth & IEEE80211_RADIOTAP_VHT_BANDWIDTH_MASK]); + } + if (known & IEEE80211_RADIOTAP_VHT_GUARD_INTERVAL_KNOWN) { + ND_PRINT("%s GI ", + (flags & IEEE80211_RADIOTAP_VHT_SHORT_GI) ? + "short" : "long"); + } + break; + } + + default: + /* this bit indicates a field whose + * size we do not know, so we cannot + * proceed. Just print the bit number. + */ + ND_PRINT("[bit %u] ", bit); + return -1; + } + + return 0; + +trunc: + nd_print_trunc(ndo); + return rc; +} + + +static int +print_in_radiotap_namespace(netdissect_options *ndo, + struct cpack_state *s, uint8_t *flags, + uint32_t presentflags, int bit0) +{ +#define BITNO_32(x) (((x) >> 16) ? 16 + BITNO_16((x) >> 16) : BITNO_16((x))) +#define BITNO_16(x) (((x) >> 8) ? 8 + BITNO_8((x) >> 8) : BITNO_8((x))) +#define BITNO_8(x) (((x) >> 4) ? 4 + BITNO_4((x) >> 4) : BITNO_4((x))) +#define BITNO_4(x) (((x) >> 2) ? 2 + BITNO_2((x) >> 2) : BITNO_2((x))) +#define BITNO_2(x) (((x) & 2) ? 1 : 0) + uint32_t present, next_present; + int bitno; + enum ieee80211_radiotap_type bit; + int rc; + + for (present = presentflags; present; present = next_present) { + /* + * Clear the least significant bit that is set. + */ + next_present = present & (present - 1); + + /* + * Get the bit number, within this presence word, + * of the remaining least significant bit that + * is set. + */ + bitno = BITNO_32(present ^ next_present); + + /* + * Stop if this is one of the "same meaning + * in all presence flags" bits. + */ + if (bitno >= IEEE80211_RADIOTAP_NAMESPACE) + break; + + /* + * Get the radiotap bit number of that bit. + */ + bit = (enum ieee80211_radiotap_type)(bit0 + bitno); + + rc = print_radiotap_field(ndo, s, bit, flags, presentflags); + if (rc != 0) + return rc; + } + + return 0; +} + +u_int +ieee802_11_radio_print(netdissect_options *ndo, + const u_char *p, u_int length, u_int caplen) +{ +#define BIT(n) (1U << n) +#define IS_EXTENDED(__p) \ + (GET_LE_U_4(__p) & BIT(IEEE80211_RADIOTAP_EXT)) != 0 + + struct cpack_state cpacker; + const struct ieee80211_radiotap_header *hdr; + uint32_t presentflags; + const nd_uint32_t *presentp, *last_presentp; + int vendor_namespace; + uint8_t vendor_oui[3]; + uint8_t vendor_subnamespace; + uint16_t skip_length; + int bit0; + u_int len; + uint8_t flags; + int pad; + u_int fcslen; + + ndo->ndo_protocol = "802.11_radio"; + if (caplen < sizeof(*hdr)) { + nd_print_trunc(ndo); + return caplen; + } + + hdr = (const struct ieee80211_radiotap_header *)p; + + len = GET_LE_U_2(hdr->it_len); + if (len < sizeof(*hdr)) { + /* + * The length is the length of the entire header, so + * it must be as large as the fixed-length part of + * the header. + */ + nd_print_trunc(ndo); + return caplen; + } + + /* + * If we don't have the entire radiotap header, just give up. + */ + if (caplen < len) { + nd_print_trunc(ndo); + return caplen; + } + nd_cpack_init(&cpacker, (const uint8_t *)hdr, len); /* align against header start */ + nd_cpack_advance(&cpacker, sizeof(*hdr)); /* includes the 1st bitmap */ + for (last_presentp = &hdr->it_present; + (const u_char*)(last_presentp + 1) <= p + len && + IS_EXTENDED(last_presentp); + last_presentp++) + nd_cpack_advance(&cpacker, sizeof(hdr->it_present)); /* more bitmaps */ + + /* are there more bitmap extensions than bytes in header? */ + if ((const u_char*)(last_presentp + 1) > p + len) { + nd_print_trunc(ndo); + return caplen; + } + + /* + * Start out at the beginning of the default radiotap namespace. + */ + bit0 = 0; + vendor_namespace = 0; + memset(vendor_oui, 0, 3); + vendor_subnamespace = 0; + skip_length = 0; + /* Assume no flags */ + flags = 0; + /* Assume no Atheros padding between 802.11 header and body */ + pad = 0; + /* Assume no FCS at end of frame */ + fcslen = 0; + for (presentp = &hdr->it_present; presentp <= last_presentp; + presentp++) { + presentflags = GET_LE_U_4(presentp); + + /* + * If this is a vendor namespace, we don't handle it. + */ + if (vendor_namespace) { + /* + * Skip past the stuff we don't understand. + * If we add support for any vendor namespaces, + * it'd be added here; use vendor_oui and + * vendor_subnamespace to interpret the fields. + */ + if (nd_cpack_advance(&cpacker, skip_length) != 0) { + /* + * Ran out of space in the packet. + */ + break; + } + + /* + * We've skipped it all; nothing more to + * skip. + */ + skip_length = 0; + } else { + if (print_in_radiotap_namespace(ndo, &cpacker, + &flags, presentflags, bit0) != 0) { + /* + * Fatal error - can't process anything + * more in the radiotap header. + */ + break; + } + } + + /* + * Handle the namespace switch bits; we've already handled + * the extension bit in all but the last word above. + */ + switch (presentflags & + (BIT(IEEE80211_RADIOTAP_NAMESPACE)|BIT(IEEE80211_RADIOTAP_VENDOR_NAMESPACE))) { + + case 0: + /* + * We're not changing namespaces. + * advance to the next 32 bits in the current + * namespace. + */ + bit0 += 32; + break; + + case BIT(IEEE80211_RADIOTAP_NAMESPACE): + /* + * We're switching to the radiotap namespace. + * Reset the presence-bitmap index to 0, and + * reset the namespace to the default radiotap + * namespace. + */ + bit0 = 0; + vendor_namespace = 0; + memset(vendor_oui, 0, 3); + vendor_subnamespace = 0; + skip_length = 0; + break; + + case BIT(IEEE80211_RADIOTAP_VENDOR_NAMESPACE): + /* + * We're switching to a vendor namespace. + * Reset the presence-bitmap index to 0, + * note that we're in a vendor namespace, + * and fetch the fields of the Vendor Namespace + * item. + */ + bit0 = 0; + vendor_namespace = 1; + if ((nd_cpack_align_and_reserve(&cpacker, 2)) == NULL) { + nd_print_trunc(ndo); + break; + } + if (nd_cpack_uint8(ndo, &cpacker, &vendor_oui[0]) != 0) { + nd_print_trunc(ndo); + break; + } + if (nd_cpack_uint8(ndo, &cpacker, &vendor_oui[1]) != 0) { + nd_print_trunc(ndo); + break; + } + if (nd_cpack_uint8(ndo, &cpacker, &vendor_oui[2]) != 0) { + nd_print_trunc(ndo); + break; + } + if (nd_cpack_uint8(ndo, &cpacker, &vendor_subnamespace) != 0) { + nd_print_trunc(ndo); + break; + } + if (nd_cpack_uint16(ndo, &cpacker, &skip_length) != 0) { + nd_print_trunc(ndo); + break; + } + break; + + default: + /* + * Illegal combination. The behavior in this + * case is undefined by the radiotap spec; we + * just ignore both bits. + */ + break; + } + } + + if (flags & IEEE80211_RADIOTAP_F_DATAPAD) + pad = 1; /* Atheros padding */ + if (flags & IEEE80211_RADIOTAP_F_FCS) + fcslen = 4; /* FCS at end of packet */ + return len + ieee802_11_print(ndo, p + len, length - len, caplen - len, pad, + fcslen); +#undef BITNO_32 +#undef BITNO_16 +#undef BITNO_8 +#undef BITNO_4 +#undef BITNO_2 +#undef BIT +} + +static u_int +ieee802_11_radio_avs_print(netdissect_options *ndo, + const u_char *p, u_int length, u_int caplen) +{ + uint32_t caphdr_len; + + ndo->ndo_protocol = "802.11_radio_avs"; + if (caplen < 8) { + nd_print_trunc(ndo); + return caplen; + } + + caphdr_len = GET_BE_U_4(p + 4); + if (caphdr_len < 8) { + /* + * Yow! The capture header length is claimed not + * to be large enough to include even the version + * cookie or capture header length! + */ + nd_print_trunc(ndo); + return caplen; + } + + if (caplen < caphdr_len) { + nd_print_trunc(ndo); + return caplen; + } + + return caphdr_len + ieee802_11_print(ndo, p + caphdr_len, + length - caphdr_len, caplen - caphdr_len, 0, 0); +} + +#define PRISM_HDR_LEN 144 + +#define WLANCAP_MAGIC_COOKIE_BASE 0x80211000 +#define WLANCAP_MAGIC_COOKIE_V1 0x80211001 +#define WLANCAP_MAGIC_COOKIE_V2 0x80211002 + +/* + * For DLT_PRISM_HEADER; like DLT_IEEE802_11, but with an extra header, + * containing information such as radio information, which we + * currently ignore. + * + * If, however, the packet begins with WLANCAP_MAGIC_COOKIE_V1 or + * WLANCAP_MAGIC_COOKIE_V2, it's really DLT_IEEE802_11_RADIO_AVS + * (currently, on Linux, there's no ARPHRD_ type for + * DLT_IEEE802_11_RADIO_AVS, as there is a ARPHRD_IEEE80211_PRISM + * for DLT_PRISM_HEADER, so ARPHRD_IEEE80211_PRISM is used for + * the AVS header, and the first 4 bytes of the header are used to + * indicate whether it's a Prism header or an AVS header). + */ +void +prism_if_print(netdissect_options *ndo, + const struct pcap_pkthdr *h, const u_char *p) +{ + u_int caplen = h->caplen; + u_int length = h->len; + uint32_t msgcode; + + ndo->ndo_protocol = "prism"; + if (caplen < 4) { + nd_print_trunc(ndo); + ndo->ndo_ll_hdr_len += caplen; + return; + } + + msgcode = GET_BE_U_4(p); + if (msgcode == WLANCAP_MAGIC_COOKIE_V1 || + msgcode == WLANCAP_MAGIC_COOKIE_V2) { + ndo->ndo_ll_hdr_len += ieee802_11_radio_avs_print(ndo, p, length, caplen); + return; + } + + if (caplen < PRISM_HDR_LEN) { + nd_print_trunc(ndo); + ndo->ndo_ll_hdr_len += caplen; + return; + } + + p += PRISM_HDR_LEN; + length -= PRISM_HDR_LEN; + caplen -= PRISM_HDR_LEN; + ndo->ndo_ll_hdr_len += PRISM_HDR_LEN; + ndo->ndo_ll_hdr_len += ieee802_11_print(ndo, p, length, caplen, 0, 0); +} + +/* + * For DLT_IEEE802_11_RADIO; like DLT_IEEE802_11, but with an extra + * header, containing information such as radio information. + */ +void +ieee802_11_radio_if_print(netdissect_options *ndo, + const struct pcap_pkthdr *h, const u_char *p) +{ + ndo->ndo_protocol = "802.11_radio"; + ndo->ndo_ll_hdr_len += ieee802_11_radio_print(ndo, p, h->len, h->caplen); +} + +/* + * For DLT_IEEE802_11_RADIO_AVS; like DLT_IEEE802_11, but with an + * extra header, containing information such as radio information, + * which we currently ignore. + */ +void +ieee802_11_radio_avs_if_print(netdissect_options *ndo, + const struct pcap_pkthdr *h, const u_char *p) +{ + ndo->ndo_protocol = "802.11_radio_avs"; + ndo->ndo_ll_hdr_len += ieee802_11_radio_avs_print(ndo, p, h->len, h->caplen); +} |