802_11_user.h

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#ifndef IEEE_802_11
#define IEEE_802_11

enum ieee_802_11_link_status_failure_reason {
        reserved0, Unspecified=1, Previous_not_valid,
        Sender_Quits_ESS_or_IBSS,
        Due_Inactivity, AP_Overload,
        Class_2_from_NonAuth,
        Class_3_from_NonAuth,
        Sender_Quits_BSS,
        Association_requester_not_authenticated,
        Reserved10
};


#define IEEE_802_11_LINK_STATUS_FAILURE_REASON_STRINGS \
{       \
        {reserved0,             0xff," Reserved reason "},\
        {Unspecified,           0xff," Unspecified Reason "},\
        {Previous_not_valid,    0xff," Previous Authentication no longer valid "},\
        {Sender_Quits_ESS_or_IBSS,0xff," Deauthenticated because sending station is leaving (has left) IBSS or ESS "},\
        {Due_Inactivity,        0xff," Disassociated due to inactivity "},\
        {AP_Overload,           0xff," Disassociated because AP is unable to handle all currently associated stations "},\
        {Class_2_from_NonAuth,  0xff," Class 2 frame received from non-Authenticated station"},\
        {Class_3_from_NonAuth,  0xff," Class 3 frame received from non­Associated station"},\
        {Sender_Quits_BSS,      0xff," Disassociated because sending station is leaving (has left) BSS"},\
        {Association_requester_not_authenticated,0xff," Station requesting (Re)Association is not Authenticated with responding station"},\
        {Reserved10,            0xff," Reserved"},\
        {0,0,NULL}\
};



struct ieee_802_11_header {
        u_int16_t       frame_control;// needs to be subtyped
        u_int16_t       duration;
        u_int8_t        mac1[6];
        u_int8_t        mac2[6];
        u_int8_t        mac3[6];
        u_int16_t       SeqCtl;
        u_int8_t        mac4[6];
//      u_int16_t       gapLen;
//      u_int8_t        gap[8];
};


struct ieee_802_3_header {

        u_int16_t       status;
        u_int16_t       payload_length;
        u_int8_t        dst_mac[6];
        u_int8_t        src_mac[6];

};

#define P80211_OUI_LEN 3

struct ieee_802_11_802_2_header {

        u_int8_t    dsap;
        u_int8_t    ssap;   /* always 0xAA */
        u_int8_t    ctrl;   /* always 0x03 */
        u_int8_t    oui[P80211_OUI_LEN];    /* organizational universal id */
        u_int16_t   type;      /* packet type ID field */
};

/* See RFC 826 for protocol description.  ARP packets are variable
   in size; the arphdr structure defines the fixed-length portion.
   Protocol type values are the same as those for 10 Mb/s Ethernet.
   It is followed by the variable-sized fields ar_sha, arp_spa,
   arp_tha and arp_tpa in that order, according to the lengths
   specified.  Field names used correspond to RFC 826.  */

#define ETH_ALEN 6

struct myarphdr
{
    unsigned short int ar_hrd;          /* Format of hardware address.  */
    unsigned short int ar_pro;          /* Format of protocol address.  */
    unsigned char ar_hln;               /* Length of hardware address.  */
    unsigned char ar_pln;               /* Length of protocol address.  */
    unsigned short int ar_op;           /* ARP opcode (command).  */
    /* Ethernet looks like this : This bit is variable sized
       however...  */
    unsigned char ar_sha[ETH_ALEN];   /* Sender hardware address.  */
    unsigned char ar_sip[4];          /* Sender IP address.  */
    unsigned char ar_tha[ETH_ALEN];   /* Target hardware address.  */
    unsigned char ar_tip[4];          /* Target IP address.  */
};


// following is incoplete and may be incorrect and need reorganization

#define ieee_802_11_frame_type_Management       0x00
#define ieee_802_11_frame_type_Control          0x01
#define ieee_802_11_frame_type_Data             0x10
#define ieee_802_11_frame_type_Reserved         0x11

#define ieee_802_11_frame_subtype_Association_Req       0x0 // Association Request
#define ieee_802_11_frame_subtype_Association_Resp      0x1 // Association Response
#define ieee_802_11_frame_subtype_Reassociation_Req     0x2 // Reassociation Request
#define ieee_802_11_frame_subtype_Reassociation_Resp    0x3 // Reassociation Response
#define ieee_802_11_frame_subtype_Probe_Req             0x4 // Probe Request
#define ieee_802_11_frame_subtype_Probe_Resp            0x5 // Probe Response
#define ieee_802_11_frame_subtype_Beacon                0x8 // Beacon
#define ieee_802_11_frame_subtype_ATIM                  0x9 // ATIM
#define ieee_802_11_frame_subtype_Disassociation        0xA // Disassociation
#define ieee_802_11_frame_subtype_Authentication        0xB // Authentication
#define ieee_802_11_frame_subtype_Deauthentication      0xC // Deauthentication
#define ieee_802_11_frame_subtype_PS_Poll               0xA // PS-Poll
#define ieee_802_11_frame_subtype_RTS                   0xB // RTS
#define ieee_802_11_frame_subtype_CTS                   0xC // CTS
#define ieee_802_11_frame_subtype_ACK                   0xD // ACK
#define ieee_802_11_frame_subtype_CFEnd                 0xE // CF-End
#define ieee_802_11_frame_subtype_CFEnd_CFAck           0xF // CF-End + CF-Ack
#define ieee_802_11_frame_subtype_Data                  0x0 // Data
#define ieee_802_11_frame_subtype_Data_CFAck            0x1 // Data + CF-Ack
#define ieee_802_11_frame_subtype_Data_CF_Poll          0x2 // Data + CF-Poll
#define ieee_802_11_frame_subtype_Data_CF_AckCF_Poll    0x3 // Data + CF-Ack + CF-Poll
#define ieee_802_11_frame_subtype_NullFunction          0x4 // Null Function (no data)
#define ieee_802_11_frame_subtype_CF_Ack                0x5 // CF-Ack (no data)
#define ieee_802_11_frame_subtype_CF_Poll               0x6 // CF-Poll (no data)
#define ieee_802_11_frame_subtype_CF_AckCF_Poll         0x7 // CF-Ack + CF-Poll (no data)


#define ieee_802_11_frame_subtype_strings {\
        { ieee_802_11_frame_subtype_Association_Req,    0xF,"f  Association Request"},\
        { ieee_802_11_frame_subtype_Association_Resp,   0xF,"1  Association Response"},\
        { ieee_802_11_frame_subtype_Reassociation_Req,  0xF,"2  Reassociation Request"},\
        { ieee_802_11_frame_subtype_Reassociation_Resp, 0xF,"3  Reassociation Response"},\
        { ieee_802_11_frame_subtype_Probe_Req   ,       0xF,"4  Probe Request"},\
        { ieee_802_11_frame_subtype_Probe_Resp  ,       0xF,"5  Probe Response"},\
        { ieee_802_11_frame_subtype_Beacon      ,       0xF,"8  Beacon"},\
        { ieee_802_11_frame_subtype_ATIM        ,       0xF,"9  ATIM"},\
        { ieee_802_11_frame_subtype_Disassociation,     0xF,"A  Disassociation"},\
        { ieee_802_11_frame_subtype_Authentication,     0xF,"B  Authentication"},\
        { ieee_802_11_frame_subtype_Deauthentication,   0xF,"C  Deauthentication"},\
        { ieee_802_11_frame_subtype_PS_Poll     ,       0xF,"A  PS-Poll"},\
        { ieee_802_11_frame_subtype_RTS         ,       0xF,"B  RTS"},\
        { ieee_802_11_frame_subtype_CTS         ,       0xF,"C  CTS"},\
        { ieee_802_11_frame_subtype_ACK         ,       0xF,"D  ACK"},\
        { ieee_802_11_frame_subtype_CFEnd       ,       0xF,"E  CF-End"},\
        { ieee_802_11_frame_subtype_CFEnd_CFAck ,       0xF,"F  CF-End + CF-Ack"},\
        { ieee_802_11_frame_subtype_Data        ,       0xF,"0  Data"},\
        { ieee_802_11_frame_subtype_Data_CFAck  ,       0xF,"1  Data + CF-Ack"},\
        { ieee_802_11_frame_subtype_Data_CFPoll ,       0xF,"2  Data + CF-Poll"},\
        { ieee_802_11_frame_subtype_Data_CFAck_CFPoll,  0xF,"3  Data + CF-Ack + CF-Poll"},\
        { ieee_802_11_frame_subtype_Null_Function ,     0xF,"4  Null Function (no data)"},\
        { ieee_802_11_frame_subtype_CFAck ,             0xF,"5  CF-Ack (no data)"},\
        { ieee_802_11_frame_subtype_CFPoll ,            0xF,"6  CF-Poll (no data)"},\
        { ieee_802_11_frame_subtype_CFAck_CFPoll,       0xF,"y7  CF-Ack + CF-Poll (no data)"},\
        { 0,0,NULL}\
}
struct ieee_802_11_frame_subtype_class {
        u_int8_t        subtype;
        u_int8_t        mask;
        u_int8_t        klass;
        u_int8_t        type;
};
#define ieee_802_11_frame_subtype_classes {\
        { ieee_802_11_frame_subtype_Association_Req,    0xF,2,ieee_802_11_frame_type_Management},\
        { ieee_802_11_frame_subtype_Association_Resp,   0xF,2,ieee_802_11_frame_type_Management},\
        { ieee_802_11_frame_subtype_Reassociation_Req,  0xF,2,ieee_802_11_frame_type_Management},\
        { ieee_802_11_frame_subtype_Reassociation_Resp, 0xF,2,ieee_802_11_frame_type_Management},\
        { ieee_802_11_frame_subtype_Probe_Req   ,       0xF,1,ieee_802_11_frame_type_Management},\
        { ieee_802_11_frame_subtype_Probe_Resp  ,       0xF,1,ieee_802_11_frame_type_Management},\
        { ieee_802_11_frame_subtype_Beacon      ,       0xF,1,ieee_802_11_frame_type_Management},\
        { ieee_802_11_frame_subtype_ATIM        ,       0xF,1,ieee_802_11_frame_type_Management},\
        { ieee_802_11_frame_subtype_Disassociation,     0xF,2,ieee_802_11_frame_type_Management},\
        { ieee_802_11_frame_subtype_Authentication,     0xF,1,ieee_802_11_frame_type_Management},\
        { ieee_802_11_frame_subtype_Deauthentication,   0xF,3,ieee_802_11_frame_type_Management},\
        { ieee_802_11_frame_subtype_PS-Poll     ,       0xF,3,ieee_802_11_frame_type_Control},\
        { ieee_802_11_frame_subtype_RTS         ,       0xF,1,ieee_802_11_frame_type_Control},\
        { ieee_802_11_frame_subtype_CTS         ,       0xF,1,ieee_802_11_frame_type_Control},\
        { ieee_802_11_frame_subtype_ACK         ,       0xF,1,ieee_802_11_frame_type_Control},\
        { ieee_802_11_frame_subtype_CFEnd       ,       0xF,1,ieee_802_11_frame_type_Control},\
        { ieee_802_11_frame_subtype_CFEnd_CFAck ,       0xF,1,ieee_802_11_frame_type_Control},\
        { ieee_802_11_frame_subtype_Data        ,       0xF,3,ieee_802_11_frame_type_Data},\
        { ieee_802_11_frame_subtype_Data_CFAck  ,       0xF,3,ieee_802_11_frame_type_Data},\
        { ieee_802_11_frame_subtype_Data_CF_Poll        0xF,3,ieee_802_11_frame_type_Data},\
        { ieee_802_11_frame_subtype_Data_CF_AckCF_Poll, 0xF,3,ieee_802_11_frame_type_Data},\
        { ieee_802_11_frame_subtype_NullFunction        0xF,1,ieee_802_11_frame_type_Data},\
        { ieee_802_11_frame_subtype_CF_Ack ,            0xF,1,ieee_802_11_frame_type_Data},\
        { ieee_802_11_frame_subtype_CF_Poll ,           0xF,1,ieee_802_11_frame_type_Data},\
        { ieee_802_11_frame_subtype_CF_AckCF_Poll,      0xF,1,ieee_802_11_frame_type_Data},\
        { 0,0,NULL}\
}

#define IEEE802_11_FC_LEN       2

#define T_MGMT 0x0  /* management */
#define T_CTRL 0x1  /* control */
#define T_DATA 0x2 /* data */
#define T_RESV 0x3  /* reserved */

#define ST_ASSOC_REQUEST        0x0
#define ST_ASSOC_RESPONSE       0x1
#define ST_REASSOC_REQUEST      0x2
#define ST_REASSOC_RESPONSE     0x3
#define ST_PROBE_REQUEST        0x4
#define ST_PROBE_RESPONSE       0x5
/* RESERVED                     0x6  */
/* RESERVED                     0x7  */
#define ST_BEACON               0x8
#define ST_ATIM                 0x9
#define ST_DISASSOC             0xA
#define ST_AUTH                 0xB
#define ST_DEAUTH               0xC
/* RESERVED                     0xD  */
/* RESERVED                     0xE  */
/* RESERVED                     0xF  */


#define CTRL_PS_POLL    0xA
#define CTRL_RTS        0xB
#define CTRL_CTS        0xC
#define CTRL_ACK        0xD
#define CTRL_CF_END     0xE
#define CTRL_END_ACK    0xF

/*
 * Bits in the frame control field.
 */
#define FC_VERSION(fc)          ((fc) & 0x3)
#define FC_TYPE(fc)             (((fc) >> 2) & 0x3)
#define FC_SUBTYPE(fc)          (((fc) >> 4) & 0xF)
#define FC_TO_DS(fc)            ((fc) & 0x0100)
#define FC_FROM_DS(fc)          ((fc) & 0x0200)
#define FC_MORE_FLAG(fc)        ((fc) & 0x0400)
#define FC_RETRY(fc)            ((fc) & 0x0800)
#define FC_POWER_MGMT(fc)       ((fc) & 0x1000)
#define FC_MORE_DATA(fc)        ((fc) & 0x2000)
#define FC_WEP(fc)              ((fc) & 0x4000)
#define FC_ORDER(fc)            ((fc) & 0x8000)


struct ieee_802_11_mgmt_header {
  u_int16_t fc;
  u_int16_t duration;
  u_int8_t  da[6];
  u_int8_t  sa[6];
  u_int8_t  bssid[6];
  u_int16_t seq_ctrl;
};


struct ieee_802_11_data_header {
        u_int16_t       fc;
        u_int16_t       duration;
        u_int8_t        mac1[6];
        u_int8_t        mac2[6];
        u_int8_t        mac3[6];
        u_int16_t       SeqCtl;
        u_int8_t        mac4[6];
//      u_int16_t       gapLen;
//      u_int8_t        gap[8];
};

struct ieee_802_11_control_header {
        u_int16_t       fc;
        u_int16_t       duration;
        u_int8_t        mac1[6];
        u_int8_t        mac2[6];
        u_int8_t        mac3[6];
        u_int16_t       SeqCtl;
        u_int8_t        mac4[6];
//      u_int16_t       gapLen;
//      u_int8_t        gap[8];
};

#define CAPABILITY_ESS(cap)     ((cap) & 0x0001)
#define CAPABILITY_IBSS(cap)    ((cap) & 0x0002)
#define CAPABILITY_CFP(cap)     ((cap) & 0x0004)
#define CAPABILITY_CFP_REQ(cap) ((cap) & 0x0008)
#define CAPABILITY_PRIVACY(cap) ((cap) & 0x0010)

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


struct rates_t {
  u_int8_t      element_id;
  u_int8_t      length;
  u_int8_t      rate[8];
};


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 ibss_t {
  u_int8_t      element_id;
  u_int8_t      length;
  u_int16_t     atim_window;
};


#define E_SSID      0
#define E_RATES     1
#define E_FH        2
#define E_DS        3
#define E_CF        4
#define E_TIM       5
#define E_IBSS      6
#define E_CHALLENGE 16
#define E_CISCO     133


struct ieee_802_11_mgmt_body {
  u_int8_t  timestamp[8];
  u_int16_t beacon_interval;
//  u_int16_t   listen_interval;
//  u_int16_t   status_code;
//  u_int16_t   aid;
//  u_char              ap[6];
//  u_int16_t   reason_code;
//  u_int16_t   auth_alg;
//  u_int16_t   auth_trans_seq_num;
//  struct challenge_t  challenge;
  u_int16_t capability_info;
//  struct ssid_t       ssid;
//  struct rates_t      rates;
//  struct ds_t ds;
//  struct cf_t cf;
//  struct fh_t fh;
//  struct tim_t        tim;
};

/* a 802.11 value */
struct val_80211 {
    unsigned int did;
    unsigned short status, len;
    unsigned int data;
};

/* header attached during prism monitor mode */
struct prism_hdr {
    unsigned int msgcode, msglen;
    char devname[16];
    struct val_80211 hosttime, mactime, channel, rssi, sq, signal,
        noise, rate, istx, frmlen;
};

struct ieee_802_11_data_body {
//FIXME
};

struct ieee_802_11_control_body {
//FIXME
};

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_LEN    (2+2+6+6+4)

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_LEN    (2+2+6+4)

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

#define CTRL_ACK_LEN    (2+2+6+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];
};

#define CTRL_PS_POLL_LEN        (2+2+6+6+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];
};

#define CTRL_END_LEN    (2+2+6+6+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];
};

#define CTRL_END_ACK_LEN        (2+2+6+6+4)

#define IV_IV(iv)       ((iv) & 0xFFFFFF)
#define IV_PAD(iv)      (((iv) >> 24) & 0x3F)
#define IV_KEYID(iv)    (((iv) >> 30) & 0x03)


#endif

---