| 1 | /* |
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| 2 | * This file is part of libtrace |
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| 3 | * |
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| 4 | * link_wireless.c |
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| 5 | * Implements the trace_get_wireless_* methods defined in libtrace.h |
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| 6 | * |
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| 7 | * Copyright (c) 2006 The University of Waikato, Hamilton, New Zealand. |
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| 8 | * Authors: Scott Raynel |
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| 9 | * Perry Lorier |
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| 10 | * |
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| 11 | * All rights reserved. |
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| 12 | * |
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| 13 | * This code has been developed by the University of Waikato WAND |
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| 14 | * research group. For further information please see http://www.wand.net.nz/ |
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| 15 | * |
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| 16 | * libtrace is free software; you can redistribute it and/or modify |
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| 17 | * it under the terms of the GNU General Public License as published by |
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| 18 | * the Free Software Foundation; either version 2 of the License, or |
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| 19 | * (at your option) any later version. |
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| 20 | * |
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| 21 | * libtrace is distributed in the hope that it will be useful, |
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| 22 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 23 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 24 | * GNU General Public License for more details. |
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| 25 | * |
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| 26 | * You should have received a copy of the GNU General Public License |
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| 27 | * along with libtrace; if not, write to the Free Software |
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| 28 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 29 | * |
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| 30 | */ |
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| 31 | |
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| 32 | #include "libtrace.h" |
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| 33 | #include "libtrace_int.h" |
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| 34 | |
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| 35 | /* Used for Radiotap fields which must be naturally aligned */ |
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| 36 | #define ALIGN_NATURAL_64(_p,_s) \ |
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| 37 | while ( (_p - _s) % sizeof(uint64_t)) _p++ |
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| 38 | #define ALIGN_NATURAL_32(_p,_s) \ |
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| 39 | while ( (_p - _s) % sizeof(uint32_t)) _p++ |
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| 40 | #define ALIGN_NATURAL_16(_p,_s) \ |
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| 41 | while ( (_p - _s) % sizeof(uint16_t)) _p++ |
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| 42 | |
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| 43 | /** Gets a field from a Radiotap header. |
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| 44 | * @param link the radiotap header |
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| 45 | * @param field the radiotap field we want to access |
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| 46 | * @return a void pointer to the field. It is up to the caller to cast to the |
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| 47 | * appropriate type. |
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| 48 | * @note Radiotap fields are always little-endian |
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| 49 | */ |
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| 50 | static void *trace_get_radiotap_field(void *link, libtrace_radiotap_field_t field) |
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| 51 | { |
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| 52 | struct libtrace_radiotap_t *rtap = (struct libtrace_radiotap_t *)link; |
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| 53 | uint8_t *p; |
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| 54 | uint8_t *s; |
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| 55 | |
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| 56 | /* Check if the field exists in the radiotap header before proceeding |
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| 57 | */ |
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| 58 | if ((bswap_le_to_host32(rtap->it_present) & (1 << field)) == 0) return NULL; |
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| 59 | |
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| 60 | /* Skip over any extended bitmasks */ |
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| 61 | p = (uint8_t *) &(rtap->it_present); |
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| 62 | |
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| 63 | while ( bswap_le_to_host32(*((uint32_t*)p)) & (1 << TRACE_RADIOTAP_EXT) ) { |
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| 64 | p += sizeof (uint32_t); |
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| 65 | } |
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| 66 | |
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| 67 | /* Point p at the first field of radiotap data and remember it for later |
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| 68 | * when we're doing field alignment |
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| 69 | */ |
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| 70 | p += sizeof(uint32_t); |
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| 71 | s = p; |
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| 72 | |
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| 73 | if (field == TRACE_RADIOTAP_TSFT) |
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| 74 | /* Always aligned */ |
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| 75 | return (void*)p; |
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| 76 | if (bswap_le_to_host32(rtap->it_present) & (1 << TRACE_RADIOTAP_TSFT)) |
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| 77 | p += sizeof (uint64_t); |
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| 78 | |
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| 79 | if (field == TRACE_RADIOTAP_FLAGS) |
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| 80 | /* Always aligned */ |
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| 81 | return (void*)p; |
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| 82 | if (bswap_le_to_host32(rtap->it_present) & (1 << TRACE_RADIOTAP_FLAGS)) |
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| 83 | p += sizeof (uint8_t); |
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| 84 | |
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| 85 | if (field == TRACE_RADIOTAP_RATE) |
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| 86 | /* Always aligned */ |
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| 87 | return (void*)p; |
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| 88 | if (bswap_le_to_host32(rtap->it_present) & (1 << TRACE_RADIOTAP_RATE)) |
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| 89 | p+= sizeof (uint8_t); |
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| 90 | |
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| 91 | if (field == TRACE_RADIOTAP_CHANNEL) |
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| 92 | { |
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| 93 | ALIGN_NATURAL_16(p,s); |
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| 94 | return (void *)p; |
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| 95 | } |
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| 96 | if (bswap_le_to_host32(rtap->it_present) & (1 << TRACE_RADIOTAP_CHANNEL)) |
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| 97 | p+= sizeof (uint32_t); |
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| 98 | |
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| 99 | if (field == TRACE_RADIOTAP_FHSS) |
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| 100 | { |
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| 101 | ALIGN_NATURAL_16(p,s); |
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| 102 | return (void *)p; |
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| 103 | } |
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| 104 | if (bswap_le_to_host32(rtap->it_present) & (1 << TRACE_RADIOTAP_FHSS)) |
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| 105 | p+= sizeof (uint16_t); |
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| 106 | |
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| 107 | if (field == TRACE_RADIOTAP_DBM_ANTSIGNAL) |
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| 108 | return (void *)p; |
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| 109 | if (bswap_le_to_host32(rtap->it_present) & (1 << TRACE_RADIOTAP_DBM_ANTSIGNAL)) |
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| 110 | p+= sizeof (uint8_t); |
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| 111 | |
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| 112 | if (field == TRACE_RADIOTAP_DBM_ANTNOISE) |
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| 113 | return (void *)p; |
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| 114 | if (bswap_le_to_host32(rtap->it_present) & (1 << TRACE_RADIOTAP_DBM_ANTNOISE)) |
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| 115 | p+= sizeof (uint8_t); |
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| 116 | |
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| 117 | if (field == TRACE_RADIOTAP_LOCK_QUALITY) |
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| 118 | { |
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| 119 | ALIGN_NATURAL_16(p,s); |
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| 120 | return (void *)p; |
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| 121 | } |
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| 122 | if (bswap_le_to_host32(rtap->it_present) & (1 << TRACE_RADIOTAP_LOCK_QUALITY)) |
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| 123 | p+= sizeof (uint16_t); |
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| 124 | |
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| 125 | if (field == TRACE_RADIOTAP_TX_ATTENUATION) |
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| 126 | { |
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| 127 | ALIGN_NATURAL_16(p,s); |
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| 128 | return (void *)p; |
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| 129 | } |
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| 130 | if (bswap_le_to_host32(rtap->it_present) & (1 << TRACE_RADIOTAP_TX_ATTENUATION)) |
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| 131 | p+= sizeof (uint16_t); |
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| 132 | |
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| 133 | if (field == TRACE_RADIOTAP_DB_TX_ATTENUATION) |
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| 134 | { |
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| 135 | ALIGN_NATURAL_16(p,s); |
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| 136 | return (void *)p; |
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| 137 | } |
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| 138 | if (bswap_le_to_host32(rtap->it_present) & (1 << TRACE_RADIOTAP_DB_TX_ATTENUATION)) |
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| 139 | p+= sizeof (uint16_t); |
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| 140 | |
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| 141 | if (field == TRACE_RADIOTAP_DBM_TX_POWER) |
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| 142 | return (void *)p; |
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| 143 | if (bswap_le_to_host32(rtap->it_present) & (1 << TRACE_RADIOTAP_DBM_TX_POWER)) |
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| 144 | p+= sizeof (uint8_t); |
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| 145 | |
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| 146 | if (field == TRACE_RADIOTAP_ANTENNA) |
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| 147 | return (void *)p; |
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| 148 | if (bswap_le_to_host32(rtap->it_present) & (1 << TRACE_RADIOTAP_ANTENNA)) |
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| 149 | p+= sizeof (uint8_t); |
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| 150 | |
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| 151 | if (field == TRACE_RADIOTAP_DB_ANTSIGNAL) |
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| 152 | return (void *)p; |
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| 153 | if (bswap_le_to_host32(rtap->it_present) & (1 << TRACE_RADIOTAP_DB_ANTSIGNAL)) |
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| 154 | p+= sizeof (uint8_t); |
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| 155 | |
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| 156 | if (field == TRACE_RADIOTAP_DB_ANTNOISE) |
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| 157 | return (void *) p; |
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| 158 | if (bswap_le_to_host32(rtap->it_present) & (1 << TRACE_RADIOTAP_DB_ANTNOISE)) |
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| 159 | p+= sizeof (uint8_t); |
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| 160 | |
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| 161 | if (field == TRACE_RADIOTAP_FCS) |
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| 162 | ALIGN_NATURAL_32(p,s); |
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| 163 | return (void *)p; |
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| 164 | |
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| 165 | /* Unknown field */ |
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| 166 | return NULL; |
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| 167 | } |
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| 168 | |
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| 169 | DLLEXPORT bool trace_get_wireless_tsft(void *link, |
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| 170 | libtrace_linktype_t linktype, uint64_t *tsft) |
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| 171 | { |
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| 172 | uint64_t *p; |
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| 173 | void *l; |
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| 174 | uint16_t type; |
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| 175 | if (link == NULL || tsft == NULL) return false; |
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| 176 | |
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| 177 | switch (linktype) { |
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| 178 | case TRACE_TYPE_80211_RADIO: |
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| 179 | if( (p = (uint64_t *) trace_get_radiotap_field(link, |
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| 180 | TRACE_RADIOTAP_TSFT))) { |
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| 181 | *tsft = bswap_le_to_host64(*p); |
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| 182 | return true; |
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| 183 | } else break; |
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| 184 | case TRACE_TYPE_LINUX_SLL: |
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| 185 | l = trace_get_payload_from_linux_sll(link, &type, NULL ); |
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| 186 | return trace_get_wireless_tsft(l, arphrd_type_to_libtrace(type), tsft); |
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| 187 | |
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| 188 | case TRACE_TYPE_80211_PRISM: |
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| 189 | return false; |
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| 190 | default: |
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| 191 | return false; |
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| 192 | } |
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| 193 | return false; |
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| 194 | } |
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| 195 | |
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| 196 | /* |
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| 197 | * This function isn't portable across drivers, so has been left static |
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| 198 | * for now. Maybe it will be included in the API later if it becomes useful |
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| 199 | * and we come up with a suitable abstraction. |
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| 200 | */ |
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| 201 | static |
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| 202 | bool trace_get_wireless_flags(void *link, |
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| 203 | libtrace_linktype_t linktype, uint8_t *flags) |
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| 204 | { |
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| 205 | uint8_t *p; |
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| 206 | void *l; |
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| 207 | uint16_t type; |
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| 208 | |
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| 209 | if (link == NULL || flags == NULL) return false; |
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| 210 | |
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| 211 | switch(linktype) { |
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| 212 | case TRACE_TYPE_80211_RADIO: |
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| 213 | if (( p = (uint8_t *) trace_get_radiotap_field(link, |
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| 214 | TRACE_RADIOTAP_FLAGS))) { |
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| 215 | *flags = *p; |
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| 216 | return true; |
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| 217 | } else break; |
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| 218 | case TRACE_TYPE_LINUX_SLL: |
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| 219 | l = trace_get_payload_from_linux_sll(link, &type, NULL); |
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| 220 | return trace_get_wireless_flags(l, arphrd_type_to_libtrace(type), flags); |
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| 221 | default: |
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| 222 | return false; |
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| 223 | } |
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| 224 | return false; |
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| 225 | } |
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| 226 | |
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| 227 | DLLEXPORT bool trace_get_wireless_rate(void *link, |
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| 228 | libtrace_linktype_t linktype, uint8_t *rate) |
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| 229 | { |
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| 230 | uint8_t * p; |
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| 231 | void *l; |
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| 232 | uint16_t type; |
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| 233 | |
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| 234 | if (link == NULL || rate == NULL) return false ; |
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| 235 | switch (linktype) { |
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| 236 | case TRACE_TYPE_80211_RADIO: |
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| 237 | if ( (p = (uint8_t *) trace_get_radiotap_field(link, |
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| 238 | TRACE_RADIOTAP_RATE))) { |
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| 239 | *rate = *p; |
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| 240 | return true; |
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| 241 | } else break; |
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| 242 | case TRACE_TYPE_LINUX_SLL: |
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| 243 | l = trace_get_payload_from_linux_sll(link, &type, NULL); |
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| 244 | return trace_get_wireless_rate(l, arphrd_type_to_libtrace(type), rate); |
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| 245 | default: |
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| 246 | return false; |
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| 247 | } |
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| 248 | return false; |
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| 249 | } |
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| 250 | |
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| 251 | DLLEXPORT bool trace_get_wireless_freq(void *link, |
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| 252 | libtrace_linktype_t linktype, uint16_t *freq) |
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| 253 | { |
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| 254 | uint16_t *p; |
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| 255 | void *l; |
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| 256 | uint16_t type; |
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| 257 | |
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| 258 | if (link == NULL || freq == NULL) return false; |
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| 259 | switch (linktype) { |
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| 260 | case TRACE_TYPE_80211_RADIO: |
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| 261 | /* NB: The channel field is actually two 16 bit fields. |
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| 262 | * The chan_freq field is the first of those two, so we |
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| 263 | * just cast it to a uint16_t. |
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| 264 | */ |
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| 265 | if (( p = (uint16_t *) trace_get_radiotap_field(link, |
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| 266 | TRACE_RADIOTAP_CHANNEL))) { |
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| 267 | *freq = bswap_le_to_host16(*p); |
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| 268 | return true; |
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| 269 | } else break; |
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| 270 | case TRACE_TYPE_LINUX_SLL: |
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| 271 | l = trace_get_payload_from_linux_sll(link, &type, NULL); |
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| 272 | return trace_get_wireless_freq(l, arphrd_type_to_libtrace(type), freq); |
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| 273 | default: |
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| 274 | return false; |
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| 275 | } |
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| 276 | return false; |
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| 277 | } |
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| 278 | |
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| 279 | /* |
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| 280 | * This function isn't portable across drivers, so has been left static |
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| 281 | * for now. Maybe it will be included in the API later if it becomes useful |
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| 282 | * and we come up with a suitable abstraction. |
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| 283 | */ |
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| 284 | static |
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| 285 | bool trace_get_wireless_channel_flags(void *link, |
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| 286 | libtrace_linktype_t linktype, uint16_t *flags) |
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| 287 | { |
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| 288 | uint16_t *p; |
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| 289 | void *l; |
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| 290 | uint16_t type; |
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| 291 | if (link == NULL || flags == NULL) return false; |
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| 292 | switch (linktype) { |
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| 293 | case TRACE_TYPE_80211_RADIO: |
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| 294 | /* NB: The channel field is actually two 16 bit fields. |
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| 295 | * The chan_flags field is the second of the two, so we need |
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| 296 | * to take the pointer returned by getting the channel field |
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| 297 | * and increment it. |
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| 298 | */ |
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| 299 | if ((p = (uint16_t *) trace_get_radiotap_field(link, |
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| 300 | TRACE_RADIOTAP_CHANNEL))) { |
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| 301 | *flags = bswap_le_to_host16(*(++p)); |
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| 302 | return true; |
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| 303 | } else break; |
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| 304 | case TRACE_TYPE_LINUX_SLL: |
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| 305 | l = trace_get_payload_from_linux_sll(link, &type, NULL); |
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| 306 | return trace_get_wireless_channel_flags(l, arphrd_type_to_libtrace(type), flags); |
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| 307 | default: |
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| 308 | return false; |
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| 309 | } |
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| 310 | return false; |
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| 311 | } |
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| 312 | |
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| 313 | /* Not sure that this function is useful for now - who uses FHSS? |
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| 314 | * This might get exported in the future if it becomes useful |
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| 315 | */ |
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| 316 | static |
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| 317 | bool trace_get_wireless_fhss_hopset(void *link, |
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| 318 | libtrace_linktype_t linktype, uint8_t *hopset) |
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| 319 | { |
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| 320 | uint8_t *p; |
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| 321 | void *l; |
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| 322 | uint16_t type; |
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| 323 | |
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| 324 | if (link == NULL || hopset == NULL) return false; |
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| 325 | switch(linktype) { |
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| 326 | case TRACE_TYPE_80211_RADIO: |
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| 327 | /* NB: As above with the channel field, the fhss field is |
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| 328 | * similar. |
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| 329 | */ |
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| 330 | if( (p = (uint8_t *) trace_get_radiotap_field(link, |
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| 331 | TRACE_RADIOTAP_FHSS))) { |
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| 332 | *hopset = *p; |
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| 333 | return true; |
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| 334 | } else break; |
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| 335 | case TRACE_TYPE_LINUX_SLL: |
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| 336 | l = trace_get_payload_from_linux_sll(link, &type, NULL); |
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| 337 | return trace_get_wireless_fhss_hopset(l, arphrd_type_to_libtrace(type), hopset); |
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| 338 | default: |
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| 339 | return false; |
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| 340 | } |
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| 341 | return false; |
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| 342 | } |
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| 343 | |
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| 344 | /* Not sure that this function is useful for now - who uses FHSS? |
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| 345 | * This might get exported in the future if it becomes useful |
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| 346 | */ |
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| 347 | static |
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| 348 | bool trace_get_wireless_fhss_hoppattern(void *link, |
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| 349 | libtrace_linktype_t linktype, uint8_t *hoppattern) |
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| 350 | { |
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| 351 | uint8_t *p; |
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| 352 | void *l; |
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| 353 | uint16_t type; |
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| 354 | if (link == NULL || hoppattern == NULL) return false; |
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| 355 | switch (linktype) { |
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| 356 | case TRACE_TYPE_80211_RADIO: |
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| 357 | if((p = (uint8_t *) trace_get_radiotap_field(link, |
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| 358 | TRACE_RADIOTAP_FHSS))) { |
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| 359 | *hoppattern = *(++p); |
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| 360 | return true; |
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| 361 | } else break; |
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| 362 | case TRACE_TYPE_LINUX_SLL: |
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| 363 | l = trace_get_payload_from_linux_sll(link, &type, NULL); |
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| 364 | return trace_get_wireless_fhss_hoppattern(l, arphrd_type_to_libtrace(type), hoppattern); |
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| 365 | default: |
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| 366 | return false; |
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| 367 | } |
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| 368 | return false; |
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| 369 | } |
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| 370 | |
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| 371 | DLLEXPORT bool trace_get_wireless_signal_strength_dbm(void *link, |
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| 372 | libtrace_linktype_t linktype, int8_t *strength) |
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| 373 | { |
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| 374 | int8_t *p; |
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| 375 | void *l; |
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| 376 | uint16_t type; |
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| 377 | |
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| 378 | if (link == NULL || strength == NULL) return false; |
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| 379 | switch(linktype) { |
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| 380 | case TRACE_TYPE_80211_RADIO: |
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| 381 | if ((p = (int8_t *) trace_get_radiotap_field(link, |
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| 382 | TRACE_RADIOTAP_DBM_ANTSIGNAL))) { |
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| 383 | *strength = *p; |
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| 384 | return true; |
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| 385 | } else break; |
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| 386 | case TRACE_TYPE_LINUX_SLL: |
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| 387 | l = trace_get_payload_from_linux_sll(link, &type, NULL); |
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| 388 | return trace_get_wireless_signal_strength_dbm(l, arphrd_type_to_libtrace(type), strength); |
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| 389 | default: |
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| 390 | return false; |
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| 391 | } |
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| 392 | return false; |
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| 393 | } |
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| 394 | |
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| 395 | DLLEXPORT bool trace_get_wireless_noise_strength_dbm(void *link, |
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| 396 | libtrace_linktype_t linktype, int8_t *strength) |
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| 397 | { |
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| 398 | uint8_t *p; |
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| 399 | void *l; |
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| 400 | uint16_t type; |
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| 401 | |
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| 402 | if (link == NULL || strength == NULL) return false; |
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| 403 | switch (linktype) { |
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| 404 | case TRACE_TYPE_80211_RADIO: |
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| 405 | if (( p = (int8_t *) trace_get_radiotap_field(link, |
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| 406 | TRACE_RADIOTAP_DBM_ANTNOISE))) { |
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| 407 | *strength = *p; |
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| 408 | return true; |
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| 409 | } else break; |
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| 410 | case TRACE_TYPE_LINUX_SLL: |
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| 411 | l = trace_get_payload_from_linux_sll(link, &type, NULL); |
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| 412 | return trace_get_wireless_noise_strength_dbm(l, arphrd_type_to_libtrace(type), strength); |
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| 413 | default: |
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| 414 | return false; |
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| 415 | } |
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| 416 | return false; |
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| 417 | } |
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| 418 | |
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| 419 | DLLEXPORT bool trace_get_wireless_signal_strength_db(void *link, |
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| 420 | libtrace_linktype_t linktype, uint8_t *strength) |
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| 421 | { |
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| 422 | uint8_t *p; |
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| 423 | void *l; |
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| 424 | uint16_t type; |
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| 425 | |
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| 426 | if (link == NULL || strength == NULL) return false; |
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| 427 | switch (linktype) { |
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| 428 | case TRACE_TYPE_80211_RADIO: |
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| 429 | if ((p = (uint8_t *) trace_get_radiotap_field(link, |
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| 430 | TRACE_RADIOTAP_DB_ANTSIGNAL))) { |
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| 431 | *strength = *p; |
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| 432 | return true; |
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| 433 | } else break; |
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| 434 | case TRACE_TYPE_LINUX_SLL: |
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| 435 | l = trace_get_payload_from_linux_sll(link, &type, NULL); |
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| 436 | return trace_get_wireless_signal_strength_db(l, arphrd_type_to_libtrace(type), strength); |
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| 437 | default: |
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| 438 | return false; |
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| 439 | } |
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| 440 | return false ; |
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| 441 | } |
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| 442 | |
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| 443 | DLLEXPORT bool trace_get_wireless_noise_strength_db(void *link, |
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| 444 | libtrace_linktype_t linktype, uint8_t *strength) |
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| 445 | { |
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| 446 | uint8_t *p; |
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| 447 | void *l; |
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| 448 | uint16_t type; |
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| 449 | |
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| 450 | if (link == NULL || strength == NULL) return false; |
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| 451 | switch (linktype) { |
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| 452 | case TRACE_TYPE_80211_RADIO: |
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| 453 | if ((p = (uint8_t *) trace_get_radiotap_field(link, |
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| 454 | TRACE_RADIOTAP_DB_ANTNOISE))) { |
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| 455 | *strength = *p; |
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| 456 | return true; |
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| 457 | } else break; |
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| 458 | case TRACE_TYPE_LINUX_SLL: |
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| 459 | l = trace_get_payload_from_linux_sll(link, &type, NULL); |
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| 460 | return trace_get_wireless_noise_strength_db(l, arphrd_type_to_libtrace(type), strength); |
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| 461 | default: |
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| 462 | return false; |
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| 463 | } |
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| 464 | return false; |
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| 465 | } |
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| 466 | |
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| 467 | /* Not sure if this function is useful. As the radiotap documentation says, |
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| 468 | * there's no set metric for defining the quality of the Barker Code Lock. |
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| 469 | * Maybe it will be exported later if it becomes useful. |
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| 470 | */ |
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| 471 | static |
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| 472 | bool trace_get_wireless_lock_quality(void *link, |
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| 473 | libtrace_linktype_t linktype, uint16_t *quality) |
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| 474 | { |
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| 475 | uint16_t *p; |
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| 476 | void *l; |
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| 477 | uint16_t type; |
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| 478 | |
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| 479 | if (link == NULL || quality == NULL) return false; |
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| 480 | switch (linktype) { |
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| 481 | case TRACE_TYPE_80211_RADIO: |
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| 482 | if((p = (uint16_t *) trace_get_radiotap_field(link, |
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| 483 | TRACE_RADIOTAP_LOCK_QUALITY))) { |
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| 484 | *quality = bswap_le_to_host16(*p); |
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| 485 | return true; |
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| 486 | } else break; |
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| 487 | case TRACE_TYPE_LINUX_SLL: |
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| 488 | l = trace_get_payload_from_linux_sll(link, &type, NULL); |
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| 489 | return trace_get_wireless_lock_quality(l, arphrd_type_to_libtrace(type), quality); |
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| 490 | default: |
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| 491 | return false; |
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| 492 | } |
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| 493 | return false; |
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| 494 | } |
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| 495 | |
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| 496 | DLLEXPORT bool trace_get_wireless_tx_attenuation(void *link, |
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| 497 | libtrace_linktype_t linktype, uint16_t *attenuation) |
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| 498 | { |
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| 499 | uint16_t *p; |
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| 500 | void *l; |
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| 501 | uint16_t type; |
|---|
| 502 | |
|---|
| 503 | if (link == NULL || attenuation == 0) return false; |
|---|
| 504 | switch (linktype) { |
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| 505 | case TRACE_TYPE_80211_RADIO: |
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| 506 | if ((p = (uint16_t *) trace_get_radiotap_field(link, |
|---|
| 507 | TRACE_RADIOTAP_TX_ATTENUATION))) { |
|---|
| 508 | *attenuation = bswap_le_to_host16(*p); |
|---|
| 509 | return true; |
|---|
| 510 | } else break; |
|---|
| 511 | case TRACE_TYPE_LINUX_SLL: |
|---|
| 512 | l = trace_get_payload_from_linux_sll(link, &type, NULL); |
|---|
| 513 | return trace_get_wireless_tx_attenuation(l, arphrd_type_to_libtrace(type), attenuation); |
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| 514 | default: |
|---|
| 515 | return false; |
|---|
| 516 | } |
|---|
| 517 | return false; |
|---|
| 518 | } |
|---|
| 519 | |
|---|
| 520 | DLLEXPORT bool trace_get_wireless_tx_attenuation_db(void *link, |
|---|
| 521 | libtrace_linktype_t linktype, uint16_t *attenuation) |
|---|
| 522 | { |
|---|
| 523 | uint16_t *p; |
|---|
| 524 | void *l; |
|---|
| 525 | uint16_t type; |
|---|
| 526 | |
|---|
| 527 | if (link == NULL || attenuation == NULL) return false; |
|---|
| 528 | switch (linktype) { |
|---|
| 529 | case TRACE_TYPE_80211_RADIO: |
|---|
| 530 | if ((p = (uint16_t *) trace_get_radiotap_field(link, |
|---|
| 531 | TRACE_RADIOTAP_DB_TX_ATTENUATION))) { |
|---|
| 532 | *attenuation = bswap_le_to_host16(*p); |
|---|
| 533 | return true; |
|---|
| 534 | } else break; |
|---|
| 535 | case TRACE_TYPE_LINUX_SLL: |
|---|
| 536 | l = trace_get_payload_from_linux_sll(link, &type, NULL); |
|---|
| 537 | return trace_get_wireless_tx_attenuation_db(l, arphrd_type_to_libtrace(type), attenuation); |
|---|
| 538 | default: |
|---|
| 539 | return false; |
|---|
| 540 | } |
|---|
| 541 | return false; |
|---|
| 542 | } |
|---|
| 543 | |
|---|
| 544 | DLLEXPORT bool trace_get_wireless_tx_power_dbm(void *link, |
|---|
| 545 | libtrace_linktype_t linktype, int8_t *txpower) |
|---|
| 546 | { |
|---|
| 547 | int8_t *p; |
|---|
| 548 | void *l; |
|---|
| 549 | uint16_t type; |
|---|
| 550 | |
|---|
| 551 | if (link == NULL || txpower == NULL) return false; |
|---|
| 552 | switch (linktype) { |
|---|
| 553 | case TRACE_TYPE_80211_RADIO: |
|---|
| 554 | if ((p=(int8_t *) trace_get_radiotap_field(link, |
|---|
| 555 | TRACE_RADIOTAP_DBM_TX_POWER))) { |
|---|
| 556 | *txpower = *p; |
|---|
| 557 | return true; |
|---|
| 558 | } else break; |
|---|
| 559 | case TRACE_TYPE_LINUX_SLL: |
|---|
| 560 | l = trace_get_payload_from_linux_sll(link, &type, NULL); |
|---|
| 561 | return trace_get_wireless_tx_power_dbm(l, arphrd_type_to_libtrace(type), txpower); |
|---|
| 562 | default: |
|---|
| 563 | return false; |
|---|
| 564 | } |
|---|
| 565 | return false; |
|---|
| 566 | } |
|---|
| 567 | |
|---|
| 568 | |
|---|
| 569 | DLLEXPORT bool trace_get_wireless_antenna(void *link, |
|---|
| 570 | libtrace_linktype_t linktype, uint8_t *antenna) |
|---|
| 571 | { |
|---|
| 572 | uint8_t *p; |
|---|
| 573 | void *l; |
|---|
| 574 | uint16_t type; |
|---|
| 575 | |
|---|
| 576 | if (link == NULL || antenna == NULL) return false; |
|---|
| 577 | switch (linktype) { |
|---|
| 578 | case TRACE_TYPE_80211_RADIO: |
|---|
| 579 | if ((p = (uint8_t *) trace_get_radiotap_field(link, |
|---|
| 580 | TRACE_RADIOTAP_ANTENNA))) { |
|---|
| 581 | *antenna = *p; |
|---|
| 582 | return true; |
|---|
| 583 | } else break; |
|---|
| 584 | case TRACE_TYPE_LINUX_SLL: |
|---|
| 585 | l = trace_get_payload_from_linux_sll(link, &type, NULL); |
|---|
| 586 | return trace_get_wireless_antenna(l, arphrd_type_to_libtrace(type), antenna); |
|---|
| 587 | default: |
|---|
| 588 | return false; |
|---|
| 589 | } |
|---|
| 590 | return false; |
|---|
| 591 | } |
|---|
| 592 | |
|---|
| 593 | DLLEXPORT bool trace_get_wireless_fcs(void *link, |
|---|
| 594 | libtrace_linktype_t linktype, uint32_t *fcs) |
|---|
| 595 | { |
|---|
| 596 | uint32_t *p; |
|---|
| 597 | void *l; |
|---|
| 598 | uint16_t type; |
|---|
| 599 | |
|---|
| 600 | if (link == NULL || fcs == NULL) return false; |
|---|
| 601 | switch (linktype) { |
|---|
| 602 | case TRACE_TYPE_80211_RADIO: |
|---|
| 603 | if ((p = (uint32_t *) trace_get_radiotap_field(link, |
|---|
| 604 | TRACE_RADIOTAP_FCS))) { |
|---|
| 605 | *fcs = bswap_le_to_host32(*p); |
|---|
| 606 | return true; |
|---|
| 607 | } else break; |
|---|
| 608 | case TRACE_TYPE_LINUX_SLL: |
|---|
| 609 | l = trace_get_payload_from_linux_sll(link, &type, NULL); |
|---|
| 610 | return trace_get_wireless_fcs(l, arphrd_type_to_libtrace(type), fcs); |
|---|
| 611 | default: |
|---|
| 612 | return false; |
|---|
| 613 | } |
|---|
| 614 | return false; |
|---|
| 615 | } |
|---|
| 616 | |
|---|