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#include <linux/skbuff.h>

#define LLC_MODULE

typedef struct llc_struct llc;

typedef struct llc_struct *llcptr;

/*

 *      LLC private data area structure.

 */

struct llc_struct

{

        char eye[4];                    /* To recognize llc area in dump */

        int retry_count;                /* LLC link state variables */

        unsigned char name[9];          /* name of this llc instance */

        unsigned char s_flag;

        unsigned char p_flag;

        unsigned char f_flag;

        unsigned char data_flag;

        unsigned char cause_flag;

        unsigned char vs;               /* Send state variable */

        unsigned char vr;               /* Receive state variable */

        unsigned char remote_busy;

        unsigned char state;            /* Current state of type2 llc procedure */

        int n1;                         /* Maximum number of bytes in I pdu 7.8.2 */

        int n2;                         /* Naximum number of retransmissions 7.8.2 */

        unsigned char k;                /* Transmit window size 7.8.4, tw in IBM doc*/

        unsigned char rw;               /* Receive window size */

        struct

        {

                /*

                 *      FRMR_RSP info field structure: 5.4.2.3.5 p55

                 */

                unsigned char cntl1;

                unsigned char cntl2;

                unsigned char vs;

                unsigned char vr_cr;

                unsigned char xxyz;

        } frmr_info_fld;

        /*

         *      Timers in 7.8.1 page 78

         */

#define P_TIMER         0

#define REJ_TIMER       1

#define ACK_TIMER       2 

#define BUSY_TIMER      3

        unsigned long timer_expire_time[4];

        unsigned char timer_state[4];   /* The state of each timer */

#define TIMER_IDLE      0

#define TIMER_RUNNING   1

#define TIMER_EXPIRED   2

        unsigned long timer_interval[4];

        struct timer_list tl[4];

        /*

         *      Client entry point, called by the LLC.

         */

        void    (*llc_event)(struct llc_struct *);

        /*

         *      Mux and Demux variables

         */

        char * client_data;             /* Pointer to clients context */

        unsigned char local_sap;

        unsigned char remote_sap ;

        char remote_mac[MAX_ADDR_LEN];  /* MAC address of remote session partner */

        struct net_device *dev;         /* Device we are attached to */

        unsigned char llc_mode;         /* See doc 7.1 on p70 */

#define MODE_ADM 1

#define MODE_ABM 2

        int llc_callbacks;              /* Pending callbacks */

#define LLC_CONN_INDICATION     1       /* We have to ensure the names don't */

#define LLC_CONN_CONFIRM        2       /* mix up with the 802 state table */

#define LLC_DATA_INDIC          4

#define LLC_DISC_INDICATION     8

#define LLC_RESET_INDIC_LOC     16

#define LLC_RESET_INDIC_REM     32

#define LLC_RST_CONFIRM         64

#define LLC_FRMR_RECV           128

#define LLC_FRMR_SENT           256

#define LLC_REMOTE_BUSY         512

#define LLC_REMOTE_NOTBUSY      1024

#define LLC_TEST_INDICATION     2048

#define LLC_XID_INDICATION      4096

#define LLC_UI_DATA             8192

        struct sk_buff *inc_skb;        /* Saved data buffer for indications */

        struct sk_buff_head rtq;        /* Retransmit queue */

        struct sk_buff_head atq;        /* Await transit queue */

        unsigned char xid_count;

        struct llc_struct *nextllc;     /* ptr to next llc struct in proto chain */

};

#define ADD_TO_RTQ(skb) skb_queue_tail(&lp->rtq,skb)

#define ADD_TO_ATQ(skb) skb_queue_tail(&lp->atq,skb)

void            llc_cancel_timers(llcptr lp);

int             llc_decode_frametype(frameptr fr);

llcptr          llc_find(void);

int             llc_free_acknowledged_skbs(llcptr lp, unsigned char ack);

void            llc_handle_xid_indication( char *chsp, short int ll, char *xid_data);

void            llc_interpret_pseudo_code(llcptr lp, int pc_label, struct sk_buff *skb, char type);

void            llc_add_to_queue(struct sk_buff *skb, struct sk_buff **f, struct sk_buff **b);

void            llc_process_otype2_frame(llcptr lp, struct sk_buff *skb, char type);

struct sk_buff *llc_pull_from_atq(llcptr lp);

int             llc_resend_ipdu(llcptr lp, unsigned char ack_nr, unsigned char type, char p);

void            llc_sendpdu(llcptr lp, char type, char pf, int data_len, char *pdu_data);

void            llc_sendipdu(llcptr lp, char type, char pf, struct sk_buff *skb);

void            llc_start_timer(llcptr lp, int t);

void            llc_stop_timer(llcptr lp, int t);

void            llc_timer_expired(llcptr lp, int t);

int             llc_validate_seq_nos(llcptr lp, frameptr fr);

int             llc_data_request(llcptr lp, struct sk_buff *skb);

void            llc_unit_data_request(llcptr lp, int ll, char * data);

void            llc_disconnect_request(llcptr lp);

void            llc_connect_request(llcptr lp);

void            llc_xid_request(llcptr lp, char opt, int data_len, char *pdu_data);

void            llc_test_request(llcptr lp, int data_len, char *pdu_data);

int             register_cl2llc_client(llcptr llc, const char *device, void (*ops)(llcptr), u8 *rmac, u8 ssap, u8 dsap);

void            unregister_cl2llc_client(llcptr lp);

int             llc_mac_data_indicate(llcptr lp, struct sk_buff *skb );