penis.c

struct RxControl {
    signed rssi: 8;             /* signal intensity of packet */
    unsigned rate: 4; 
    unsigned is_group: 1;
    unsigned: 1;
    unsigned sig_mode: 2;       /* 0:is not 11n packet; non-0:is 11n packet; */
    unsigned legacy_length: 12; /* if not 11n packet, shows length of packet. */
    unsigned damatch0: 1;
    unsigned damatch1: 1;
    unsigned bssidmatch0: 1;
    unsigned bssidmatch1: 1;
    unsigned MCS: 7;            /* if is 11n packet, shows the modulation
                                   and code used (range from 0 to 76) */
    unsigned CWB: 1;            /* if is 11n packet, shows if is HT40 packet or not */
    unsigned HT_length: 16;     /* if is 11n packet, shows length of packet. */
    unsigned Smoothing: 1;
    unsigned Not_Sounding: 1;
    unsigned: 1;
    unsigned Aggregation: 1;
    unsigned STBC: 2;
    unsigned FEC_CODING: 1;      /* if is 11n packet, shows if is LDPC packet or not. */
    unsigned SGI: 1;
    unsigned rxend_state: 8;
    unsigned ampdu_cnt: 8;
    unsigned channel: 4;         /* which channel this packet in. */
    unsigned: 12;
};

struct LenSeq {
    uint16_t len;     /* length of packet */
    uint16_t seq;     /* serial number of packet, the high 12bits are serial number,
                         low 14 bits are Fragment number (usually be 0) */
    uint8_t addr3[6]; /* the third address in packet */
};

struct sniffer_buf {
    struct RxControl rx_ctrl;
    uint8_t buf[36];         /* head of ieee80211 packet */
    uint16_t cnt;            /* number count of packet */
    struct LenSeq lenseq[1]; /* length of packet */
};

struct sniffer_buf2 {
    struct RxControl rx_ctrl;
    uint8_t buf[112]; /* may be 240, please refer to the real source code (???) */
    uint16_t cnt; 
    uint16_t len;     /* length of packet */
};