| 1 | /*
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| 2 | * Copyright (c) 2015 Jan Kolarik
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup libnet
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| 30 | * @{
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| 31 | */
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| 32 |
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| 33 | /** @file ieee80211.h
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| 34 | *
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| 35 | * IEEE 802.11 interface definition.
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| 36 | */
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| 37 |
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| 38 | #ifndef LIBNET_IEEE80211_H
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| 39 | #define LIBNET_IEEE80211_H
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| 40 |
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| 41 | #include <ddf/driver.h>
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| 42 | #include <sys/types.h>
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| 43 | #include <nic.h>
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| 44 |
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| 45 | /** Initial channel frequency. */
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| 46 | #define IEEE80211_FIRST_FREQ 2412
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| 47 |
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| 48 | /** Max supported channel frequency. */
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| 49 | #define IEEE80211_MAX_FREQ 2472
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| 50 |
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| 51 | /* Gap between IEEE80211 channels in MHz. */
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| 52 | #define IEEE80211_CHANNEL_GAP 5
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| 53 |
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| 54 | #define IEEE80211_FRAME_CTRL_FRAME_TYPE 0x000C
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| 55 | #define IEEE80211_FRAME_CTRL_DATA_FRAME 0x0008
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| 56 |
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| 57 | struct ieee80211_dev;
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| 58 |
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| 59 | /** Device operating modes. */
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| 60 | typedef enum {
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| 61 | IEEE80211_OPMODE_ADHOC,
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| 62 | IEEE80211_OPMODE_MESH,
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| 63 | IEEE80211_OPMODE_AP,
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| 64 | IEEE80211_OPMODE_STATION
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| 65 | } ieee80211_operating_mode_t;
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| 66 |
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| 67 | /** IEEE 802.11 functions. */
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| 68 | typedef struct {
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| 69 | int (*start)(struct ieee80211_dev *);
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| 70 | int (*scan)(struct ieee80211_dev *);
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| 71 | int (*tx_handler)(struct ieee80211_dev *, void *, size_t);
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| 72 | } ieee80211_ops_t;
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| 73 |
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| 74 | /** IEEE 802.11 WiFi device structure. */
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| 75 | typedef struct ieee80211_dev {
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| 76 | /** Backing DDF device. */
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| 77 | ddf_dev_t *ddf_dev;
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| 78 |
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| 79 | /** Pointer to implemented IEEE 802.11 operations. */
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| 80 | ieee80211_ops_t *ops;
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| 81 |
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| 82 | /** Pointer to driver specific data. */
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| 83 | void *driver_data;
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| 84 |
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| 85 | /** Current operating frequency. */
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| 86 | uint16_t current_freq;
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| 87 |
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| 88 | /** Current operating mode. */
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| 89 | ieee80211_operating_mode_t current_op_mode;
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| 90 |
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| 91 | /* TODO: Probably to be removed later - nic.open function is now
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| 92 | * executed multiple times, have to find out reason and fix it.
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| 93 | */
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| 94 | /** Indicates whether driver has already started. */
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| 95 | bool started;
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| 96 | } ieee80211_dev_t;
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| 97 |
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| 98 | /** IEEE 802.11 header structure. */
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| 99 | typedef struct {
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| 100 | uint16_t frame_ctrl; /**< Little Endian value! */
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| 101 | uint16_t duration_id; /**< Little Endian value! */
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| 102 | uint8_t address1[ETH_ADDR];
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| 103 | uint8_t address2[ETH_ADDR];
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| 104 | uint8_t address3[ETH_ADDR];
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| 105 | uint16_t seq_ctrl; /**< Little Endian value! */
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| 106 | uint8_t address4[ETH_ADDR];
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| 107 | } __attribute__((packed)) __attribute__ ((aligned(2))) ieee80211_header_t;
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| 108 |
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| 109 | extern bool ieee80211_is_data_frame(ieee80211_header_t *header);
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| 110 | extern int ieee80211_device_init(ieee80211_dev_t *ieee80211_dev,
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| 111 | void *driver_data, ddf_dev_t *ddf_dev);
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| 112 | extern int ieee80211_init(ieee80211_dev_t *ieee80211_dev,
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| 113 | ieee80211_ops_t *ieee80211_ops);
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| 114 |
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| 115 | #endif /* LIBNET_IEEE80211_H */
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| 116 |
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| 117 | /** @}
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| 118 | */
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