pkts.h

#ifndef _PKTS_TABLE_H
#define _PKTS_TABLE_H
#define TCP_HEADER_SIZE 16
struct data_layer_header {
  u_int32_t pkt_len; 
  u_int8_t src_mac[6];
  u_int8_t dest_mac[6];
  u_int16_t frame_control ;
  u_int16_t seq_ctrl ;
#ifdef TRANSPORT_LAYER_CAPTURE
  u_int16_t eth_type ;  
  u_int8_t ip_type ;
  u_int64_t ip_src ; 
  u_int64_t ip_dest ; 
  union {
    struct{
      u_int16_t src_port ;
      u_int16_t dest_port ;
    } udp ;
    struct {
      unsigned char tcp_hdr[TCP_HEADER_SIZE] ;
    }tcp ;
  } trans_content;
#endif

} ; 


struct data_layer_err_header {
  u_int32_t pkt_len; 
  u_int8_t src_mac[6];
  u_int8_t dest_mac[6];
  u_int16_t frame_control ;
  u_int16_t seq_ctrl ;
};

struct mgmt_layer_err_header {
  u_int32_t pkt_len; 
  u_int8_t src_mac[6];
  u_int16_t frame_control ;
  u_int16_t seq_ctrl ;
} ;

struct mgmt_beacon_layer_header {
  u_int32_t pkt_len; 
  u_int8_t src_mac[6];
  u_int16_t frame_control ;
  u_int16_t seq_ctrl ;
  u_int8_t ht_support ;
  u_int16_t cap_info ;
  int8_t max_rate ;
} ;


struct control_layer_header{
  u_int32_t pkt_len; 
  u_int8_t src_mac[6];
  u_int16_t frame_control ;
};

struct ctrl_rts_t {
  u_int16_t       fc;
  u_int16_t       duration;
  u_int8_t        ra[6];
  u_int8_t        ta[6];
  u_int8_t        fcs[4];
};

#define CTRL_RTS_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+\
                         IEEE802_11_RA_LEN+IEEE802_11_TA_LEN)

struct ctrl_cts_t {
  u_int16_t       fc;
  u_int16_t       duration;
  u_int8_t        ra[6];
  u_int8_t        fcs[4];
};

#define CTRL_CTS_HDRLEN (IEEE802_11_FC_LEN+IEEE802_11_DUR_LEN+IEEE802_11_RA_LEN)

struct ctrl_ack_t {
  u_int16_t       fc;
  u_int16_t       duration;
  u_int8_t        ra[6];
  u_int8_t        fcs[4];
};

struct ctrl_end_t {
  u_int16_t       fc;
  u_int16_t       duration;
  u_int8_t        ra[6];
  u_int8_t        bssid[6];
  u_int8_t        fcs[4];
};
struct ctrl_end_ack_t {
  u_int16_t       fc;
  u_int16_t       duration;
  u_int8_t        ra[6];
  u_int8_t        bssid[6];
  u_int8_t        fcs[4];
};
struct ctrl_ps_poll_t {
  u_int16_t       fc;
  u_int16_t       aid;
  u_int8_t        bssid[6];
  u_int8_t        ta[6];
  u_int8_t        fcs[4];
};

struct ctrl_ba_t {
  u_int16_t       fc;
  u_int16_t       duration;
  u_int8_t        ra[6];
  u_int8_t        fcs[4];
};

struct ctrl_bar_t {
  u_int16_t       fc;
  u_int16_t       dur;
  u_int8_t        ra[6];
  u_int8_t        ta[6];
  u_int16_t       ctl;
  u_int16_t       seq;
  u_int8_t        fcs[4];
};


// end of less significant packets 

struct mgmt_header_t {
  u_int16_t    fc;               /* 2 bytes */
  u_int16_t    duration;         /* 2 bytes */
  u_int8_t     da[6];            /* 6 bytes */
  u_int8_t     sa[6];            /* 6 bytes */
  u_int8_t     bssid[6];         /* 6 bytes */
  u_int16_t    seq_ctrl;         /* 2 bytes */

};

struct rates_t {
  u_int8_t        element_id;
  u_int8_t        length;
  u_int8_t        rate[16];
};

struct challenge_t {
  u_int8_t        element_id;
  u_int8_t        length;
  u_int8_t        text[254]; /* 1-253 + 1 for null */
};

struct fh_t {
  u_int8_t        element_id;
  u_int8_t        length;
  u_int16_t       dwell_time;
  u_int8_t        hop_set;
  u_int8_t        hop_pattern;
  u_int8_t        hop_index;
};

struct ds_t {
  u_int8_t        element_id;
  u_int8_t        length;
  u_int8_t        channel;
};

struct cf_t {
  u_int8_t        element_id;
  u_int8_t        length;
  u_int8_t        count;
  u_int8_t        period;
  u_int16_t       max_duration;
  u_int16_t       dur_remaing;
};

struct tim_t {
  u_int8_t        element_id;
  u_int8_t        length;
  u_int8_t        count;
  u_int8_t        period;
  u_int8_t        bitmap_control;
  u_int8_t        bitmap[251];
};

struct ssid_t {
  u_int8_t        element_id;
  u_int8_t        length;
  u_char          ssid[33];  /* 32 + 1 for null */
};

struct mgmt_body_t {
  u_int8_t        timestamp[IEEE802_11_TSTAMP_LEN];
  u_int16_t       beacon_interval;
  u_int16_t       listen_interval;
  u_int16_t       status_code;
  u_int16_t       aid;
  u_char          ap[IEEE802_11_AP_LEN];
  u_int16_t       reason_code;
  u_int16_t       auth_alg;
  u_int16_t       auth_trans_seq_num;
  int             challenge_present;
  struct challenge_t  challenge;
  u_int16_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;
};

/*
 * A somewhat abstracted view of the LLC header
 */

struct llc_hdr {
  u_int8_t dsap;
  u_int8_t ssap;
  struct {
    u_int8_t ui;
    u_int8_t org_code[3];
    u_int16_t ether_type;
  } snap;
};


#endif /* PKTS_TABLE_H*/