packet-ieee80211-radiotap-iter.h

/*
 * Radiotap parser
 *
 * Copyright 2007       Andy Green <[email protected]>
 * Copyright 2009       Johannes Berg <[email protected]>
 *
 * SPDX-License-Identifier: (ISC OR GPL-2.0-only)
 */
 
#ifndef __RADIOTAP_ITER_H
#define __RADIOTAP_ITER_H
 
#define RADIOTAP_SUPPORT_OVERRIDES
 
#include "packet-ieee80211-radiotap-defs.h"
 
/* Radiotap header iteration
 *   implemented in radiotap.c
 */
 
struct radiotap_override {
    uint8_t field;
    unsigned align:4, size:4;
};
 
struct radiotap_align_size {
    unsigned align:4, size:4;
};
 
struct ieee80211_radiotap_namespace {
    const struct radiotap_align_size *align_size;
    int n_bits;
    uint32_t oui;
    uint8_t subns;
};
 
struct ieee80211_radiotap_vendor_namespaces {
    const struct ieee80211_radiotap_namespace *ns;
    int n_ns;
};
 
struct ieee80211_radiotap_iterator {
    struct ieee80211_radiotap_header *_rtheader;                
    const struct ieee80211_radiotap_vendor_namespaces *_vns;        
    const struct ieee80211_radiotap_namespace *current_namespace;       
    unsigned char *_arg, *_next_ns_data;                    
    uint32_t *_next_bitmap;                         
    unsigned char *this_arg;                        
#ifdef RADIOTAP_SUPPORT_OVERRIDES
    const struct radiotap_override *overrides;              
    int n_overrides;                            
#endif
    int this_arg_index;                         
    int this_arg_size;                          
    int is_radiotap_ns;
    int tlv_mode;
 
    int _max_length;                            
    int _arg_index;                             
    uint32_t _bitmap_shifter;                       
    int _reset_on_ext;                          
};
 
extern int ieee80211_radiotap_iterator_init(
    struct ieee80211_radiotap_iterator *iterator,
    struct ieee80211_radiotap_header *radiotap_header,
    int max_length, const struct ieee80211_radiotap_vendor_namespaces *vns);
 
extern int ieee80211_radiotap_iterator_next(
    struct ieee80211_radiotap_iterator *iterator);
 
#endif /* __RADIOTAP_ITER_H */