308 lines
9.0 KiB
C
308 lines
9.0 KiB
C
/*
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* This file is part of the rtap localisation project.
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*/
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#ifndef _LIBOWLPS_H_
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#define _LIBOWLPS_H_
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#ifdef __cplusplus
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extern "C" {
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#endif // __cplusplus
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <inttypes.h>
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#include <pthread.h>
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#include <time.h>
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#include <sys/types.h>
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#include <math.h>
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#include <signal.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <net/if.h>
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#include <sys/ioctl.h>
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#include <iwlib.h>
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#include <wireless.h>
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// Port on which the positioning request is sent by the mobile:
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#define LOC_REQUEST_DEFAULT_PORT 9900
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// Port on which listeners and aggregator communicate:
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#define AGGREGATE_DEFAULT_PORT 9901
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// Port on which aggregator and positioning server communicate:
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#define POSITIONER_DEFAULT_PORT 9902
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// Port on which autocalibration requests are sent by the listeners:
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#define DEFAULT_AUTOCALIBRATION_REQUEST_PORT 9903
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// Port on which the aggregator listens for hello messages from the
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// listeners, and the listeners listen for orders from the aggregator:
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#define DEFAULT_AUTOCALIBRATION_PORT 9904
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// Port on which the mobile listens for its position:
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#define MOBILE_DEFAULT_PORT 9910
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/* Boolean type */
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typedef enum {FALSE, TRUE} owl_bool ;
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#define OWL_BOOL_TO_STRING(B) ((B) ? "true" : "false")
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/* Direction type */
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enum {NORTH = 1, EAST, SOUTH, WEST} ;
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#define OWL_DIRECTION_MIN 1
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#define OWL_DIRECTION_MAX 4
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typedef uint8_t owl_direction ;
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/* Timestamp type (struct timespec clone with fix-sized fields) */
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typedef struct _owl_timestamp
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{
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uint32_t tv_sec ;
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uint32_t tv_nsec ;
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} owl_timestamp ;
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// Length of a owl_timestamp when converted to string:
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#define OWL_TIMESTAMP_STR_LEN 22 // 22 = 10 digits, '.', 10 digits, '\0'
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/* Message sent by the listener to the aggregator */
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typedef struct _owl_captured_request
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{
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uint8_t type ; // Type of the captured request
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uint8_t ap_mac_addr_bytes[ETHER_ADDR_LEN] ; // MAC of the listener
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uint8_t mobile_mac_addr_bytes[ETHER_ADDR_LEN] ; // MAC of the mobile
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uint8_t mobile_ip_addr_bytes[4] ; // IP of the mobile
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owl_timestamp request_time ; // Request ID (timestamp on the mobile)
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owl_timestamp start_time ; // Timestamp of arrival on the listener
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uint8_t antenna_signal_dbm ; // Signal strength measured by the listener
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/* Calibration data */
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float x_position ;
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float y_position ;
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float z_position ;
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owl_direction direction ;
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} owl_captured_request ;
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/* Message sent by the aggregator to the positioning server containing
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* the main data of a request */
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typedef struct _owl_request
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{
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uint8_t type ; // Type of the request
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uint8_t mobile_mac_addr_bytes[ETHER_ADDR_LEN] ; // MAC of the mobile
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owl_timestamp request_time ; // Request ID (timestamp on the mobile)
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uint16_t nb_info ; // Number of (listener MAC;signal strength) couples
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} owl_request ;
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/* Message sent by the aggregator to the positioning server refering to
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* a request, indicating that an AP received the request with a given
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* signal strength */
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typedef struct _owl_request_info
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{
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uint8_t ap_mac_addr_bytes[ETHER_ADDR_LEN] ; // MAC of the listener
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uint8_t antenna_signal_dbm ; // Signal strength measured by the listener
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} owl_request_info ;
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/* Hello message sent by the listener to the aggregator */
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typedef struct _owl_autocalibration_hello
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{
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uint8_t ap_mac_addr_bytes[ETHER_ADDR_LEN] ;
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} owl_autocalibration_hello ;
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/* Message sent to the listener to order an emission */
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#define AUTOCALIBRATION_ORDER_SEND 1
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typedef struct _owl_autocalibration_order
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{
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uint8_t order ;
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} owl_autocalibration_order ;
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/* Positioning request types */
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#define OWL_REQUEST_NORMAL 0
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#define OWL_REQUEST_CALIBRATION 1
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#define OWL_REQUEST_AUTOCALIBRATION 2
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#define OWL_REQUEST_IMPLICIT 10
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/* Wi-Fi channel frequencies in Hz */
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#define CHANNEL_1 2412
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#define CHANNEL_2 2417
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#define CHANNEL_3 2422
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#define CHANNEL_4 2427
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#define CHANNEL_5 2432
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#define CHANNEL_6 2437
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#define CHANNEL_7 2442
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#define CHANNEL_8 2447
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#define CHANNEL_9 2452
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#define CHANNEL_10 2457
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#define CHANNEL_11 2462
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#define CHANNEL_12 2467
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#define CHANNEL_13 2472
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#define CHANNEL_14 2477
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/* Packet header sizes (in bytes) */
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#define IEEE80211_HEADER_SIZE_DATA 24 // Header size for a Data frame
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#define LLC_HEADER_SIZE 8
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/* IEEE 802.11 frame types */
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// Beacon (TODO: convert to mask)
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#define RAW_PACKET_TYPE_BEACON 0x80
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// Data frame
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#define FRAME_TYPE_DATA_MASK 0x08
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#define IS_DATA_FRAME(FC1) \
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(((FC1) & FRAME_TYPE_DATA_MASK) == FRAME_TYPE_DATA_MASK)
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// QoS Data frame
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#define FRAME_SUBTYPE_QOS_MASK 0x80
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#define DATA_FRAME_IS_QOS(FC1) \
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(((FC1) & FRAME_SUBTYPE_QOS_MASK) == FRAME_SUBTYPE_QOS_MASK)
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// To/From DS
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#define FRAME_FROM_STA_MASK 0x02
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#define IS_FRAME_FROM_STA(FC2) \
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(((FC2) & FRAME_FROM_STA_MASK) != FRAME_FROM_STA_MASK)
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/* Positions of the radiotap header fixed fields (in bytes) */
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#define RTAP_P_HREVISION 0 // Header revision
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#define RTAP_P_HPAD 1 // Header pad
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#define RTAP_P_HLENGTH 2 // Header length
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#define RTAP_P_PRESENTFLAGS 4 // Present flags
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/* Radiotap field lengths (in bytes) */
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#define RTAP_L_HREVISION 1 // Header revision
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#define RTAP_L_HPAD 1 // Header pad
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#define RTAP_L_HLENGTH 2 // Header length
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#define RTAP_L_PRESENTFLAGS 4 // Present flags
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#define RTAP_L_MACTS 8 // MAC timestamp (Time Synchronization Function Timer)
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#define RTAP_L_FLAGS 1 // autre champ de flags
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#define RTAP_L_RATE 1 // Data rate
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#define RTAP_L_CHANNEL 2 // Channel frequency
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#define RTAP_L_CHANNELTYPE 2 // Channel type
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#define RTAP_L_ANTENNASIGNALDBM 1 // SSI signal (dBm)
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#define RTAP_L_ANTENNANOISEDBM 1 // SSI noise (dBm)
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#define RTAP_L_ANTENNA 1 // Antenna number
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#define RTAP_L_FHSS 2 // Hop set and pattern for Frequency-Hopping Spread Spectrum
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#define RTAP_L_LOCKQUALITY 2 // Signal quality
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#define RTAP_L_TXATTENUATION 2 // Transmit power from max power
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#define RTAP_L_TXATTENUATIONDB 2 // Idem (dB)
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#define RTAP_L_TXATTENUATIONDBM 1 // Idem (dBm)
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#define RTAP_L_ANTENNASIGNALDB 1 // SSI signal (dB)
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#define RTAP_L_ANTENNANOISEDB 1 // SSI noise (dB)
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#define RTAP_L_FCS 4 // Frame Check Sequence
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//#define RTAP_L_CHANNELP // Extended channel info (not implemented)
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//#define RTAP_L_EXT // Extension aux Present flags (not emplemented)
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/* Positions in 'Present flags' (and present fields 'check' array) */
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#define RTAP_MACTS 0
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#define RTAP_FLAGS 1
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#define RTAP_RATE 2
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#define RTAP_CHANNEL 3 // and RTAP_CHANNELTYPE
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#define RTAP_FHSS 4
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#define RTAP_ANTENNASIGNALDBM 5
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#define RTAP_ANTENNANOISEDBM 6
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#define RTAP_LOCKQUALITY 7
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#define RTAP_TXATTENUATION 8
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#define RTAP_TXATTENUATIONDB 9
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#define RTAP_TXATTENUATIONDBM 10
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#define RTAP_ANTENNA 11
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#define RTAP_ANTENNASIGNALDB 12
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#define RTAP_ANTENNANOISEDB 13
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#define RTAP_FCS 14
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//#define RTAP_CHANNELP 18
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//#define RTAP_EXT 31
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/* Misc. */
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// Length of a MAC address in string format (including '\0')
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#define OWL_ETHER_ADDR_STRLEN 18
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/* Global variables */
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extern owl_bool run ;
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/* Function error codes */
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#define ERR_SETTING_MODE 101
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#define ERR_SETTING_CHANNEL 102
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#define ERR_READING_CHANNEL 103
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#define ERR_READING_MODE 104
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#define ERR_BAD_SIGNAL 111
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/* Function headers */
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// Misc
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const char* owl_mac_bytes_to_string(uint8_t *mac_binary) ;
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void owl_mac_bytes_to_string_r(uint8_t *mac_binary,
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char mac_str[OWL_ETHER_ADDR_STRLEN]) ;
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owl_bool owl_mac_equals(uint8_t *mac1, uint8_t *mac2) ;
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uint_fast8_t owl_frequency_to_channel(uint_fast16_t channel) ;
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// Time
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int owl_timestamp_now(owl_timestamp *now) ;
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owl_timestamp owl_timespec_to_timestamp(const struct timespec d) ;
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owl_timestamp owl_timeval_to_timestamp(const struct timeval d) ;
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void owl_timestamp_to_string(char *dst, owl_timestamp src) ;
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owl_bool owl_timestamp_equals(owl_timestamp d1, owl_timestamp d2) ;
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owl_bool owl_timestamp_is_null(owl_timestamp d) ;
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uint64_t owl_timestamp_to_ms(owl_timestamp date) ;
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uint_fast32_t owl_time_elapsed_ms(const owl_timestamp d1,
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const owl_timestamp d2) ;
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owl_timestamp owl_time_elapsed(const owl_timestamp d1,
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const owl_timestamp d2) ;
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owl_timestamp owl_hton_timestamp(owl_timestamp date) ;
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owl_timestamp owl_ntoh_timestamp(owl_timestamp date) ;
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// Network
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int owl_create_udp_trx_socket(char *server_address,
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uint_fast16_t server_port,
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struct sockaddr_in *server_description,
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struct sockaddr_in *client_description) ;
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int owl_create_udp_listening_socket(uint_fast16_t port) ;
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int owl_iface_mode_monitor(char *iface) ;
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int owl_iface_set_channel(char *iface, uint_fast8_t channel) ;
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int owl_iface_channel_hop(char *iface) ;
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// Signals
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void owl_sigint_handler(int num) ;
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void owl_sigterm_handler(int num) ;
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// Threads
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void owl_close_fd(void *fd) ;
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void owl_close_file(void *file) ;
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/* Macros */
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/*
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* Test if a IEEE 802.11 frame is a retry.
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* Input: IEEE 802.11 header flags.
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* Returns 0 if the Retry bit is absent, a positive value if present.
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*/
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#define IS_RETRY(IEEE80211_FLAGS) ((IEEE80211_FLAGS) & 0x08)
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#ifdef __cplusplus
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}
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#endif // __cplusplus
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#endif // _LIBOWLPS_H_
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