LXR linux-old/include/net/llc.h

   1#include <linux/skbuff.h>
   2
   3#define LLC_MODULE
   4
   5typedef struct llc_struct llc;
   6typedef struct llc_struct *llcptr;
   7
   8/*
   9 *      LLC private data area structure.
  10 */
  11
  12struct llc_struct
  13{ 
  14        char eye[4];                    /* To recognize llc area in dump */
  15        int retry_count;                /* LLC link state variables */
  16        unsigned char name[9];          /* name of this llc instance */
  17        unsigned char s_flag;
  18        unsigned char p_flag;
  19        unsigned char f_flag;
  20        unsigned char data_flag;
  21        unsigned char cause_flag;
  22        unsigned char vs;               /* Send state variable */
  23        unsigned char vr;               /* Receive state variable */
  24        unsigned char remote_busy;
  25        unsigned char state;            /* Current state of type2 llc procedure */
  26        int n1;                         /* Maximum number of bytes in I pdu 7.8.2 */
  27        int n2;                         /* Naximum number of retransmissions 7.8.2 */
  28        unsigned char k;                /* Transmit window size 7.8.4, tw in IBM doc*/ 
  29        unsigned char rw;               /* Receive window size */
  30        struct 
  31        {                               
  32                /*
  33                 *      FRMR_RSP info field structure: 5.4.2.3.5 p55
  34                 */
  35
  36                unsigned char cntl1;
  37                unsigned char cntl2;
  38                unsigned char vs;
  39                unsigned char vr_cr;
  40                unsigned char xxyz;
  41        } frmr_info_fld;
  42
  43        /*
  44         *      Timers in 7.8.1 page 78 
  45         */
  46
  47#define P_TIMER         0
  48#define REJ_TIMER       1
  49#define ACK_TIMER       2 
  50#define BUSY_TIMER      3
  51        unsigned long timer_expire_time[4];     
  52        unsigned char timer_state[4];   /* The state of each timer */
  53#define TIMER_IDLE      0
  54#define TIMER_RUNNING   1
  55#define TIMER_EXPIRED   2
  56        unsigned long timer_interval[4]; 
  57        struct timer_list tl[4];
  58
  59        /* 
  60         *      Client entry point, called by the LLC.
  61         */
  62         
  63        void    (*llc_event)(struct llc_struct *);
  64        
  65        /*
  66         *      Mux and Demux variables
  67         */
  68         
  69        char * client_data;             /* Pointer to clients context */
  70        unsigned char local_sap;
  71        unsigned char remote_sap ;
  72        char remote_mac[MAX_ADDR_LEN];  /* MAC address of remote session partner */ 
  73        struct net_device *dev;         /* Device we are attached to */
  74                     
  75        unsigned char llc_mode;         /* See doc 7.1 on p70 */
  76#define MODE_ADM 1
  77#define MODE_ABM 2
  78
  79        int llc_callbacks;              /* Pending callbacks */
  80#define LLC_CONN_INDICATION     1       /* We have to ensure the names don't */
  81#define LLC_CONN_CONFIRM        2       /* mix up with the 802 state table */
  82#define LLC_DATA_INDIC          4
  83#define LLC_DISC_INDICATION     8
  84#define LLC_RESET_INDIC_LOC     16
  85#define LLC_RESET_INDIC_REM     32
  86#define LLC_RST_CONFIRM         64
  87#define LLC_FRMR_RECV           128
  88#define LLC_FRMR_SENT           256
  89#define LLC_REMOTE_BUSY         512
  90#define LLC_REMOTE_NOTBUSY      1024
  91#define LLC_TEST_INDICATION     2048
  92#define LLC_XID_INDICATION      4096
  93#define LLC_UI_DATA             8192
  94
  95        struct sk_buff *inc_skb;        /* Saved data buffer for indications */
  96        
  97        struct sk_buff_head rtq;        /* Retransmit queue */
  98        struct sk_buff_head atq;        /* Await transit queue */
  99      
 100        unsigned char xid_count;
 101
 102        struct llc_struct *nextllc;     /* ptr to next llc struct in proto chain */
 103};
 104
 105#define ADD_TO_RTQ(skb) skb_queue_tail(&lp->rtq,skb)
 106#define ADD_TO_ATQ(skb) skb_queue_tail(&lp->atq,skb)
 107
 108void            llc_cancel_timers(llcptr lp);
 109int             llc_decode_frametype(frameptr fr);
 110llcptr          llc_find(void);
 111int             llc_free_acknowledged_skbs(llcptr lp, unsigned char ack);
 112void            llc_handle_xid_indication( char *chsp, short int ll, char *xid_data);
 113void            llc_interpret_pseudo_code(llcptr lp, int pc_label, struct sk_buff *skb, char type);
 114void            llc_add_to_queue(struct sk_buff *skb, struct sk_buff **f, struct sk_buff **b);
 115void            llc_process_otype2_frame(llcptr lp, struct sk_buff *skb, char type);
 116struct sk_buff *llc_pull_from_atq(llcptr lp); 
 117int             llc_resend_ipdu(llcptr lp, unsigned char ack_nr, unsigned char type, char p);
 118void            llc_sendpdu(llcptr lp, char type, char pf, int data_len, char *pdu_data);
 119void            llc_sendipdu(llcptr lp, char type, char pf, struct sk_buff *skb);
 120void            llc_start_timer(llcptr lp, int t);
 121void            llc_stop_timer(llcptr lp, int t);
 122void            llc_timer_expired(llcptr lp, int t);
 123int             llc_validate_seq_nos(llcptr lp, frameptr fr);
 124
 125int             llc_data_request(llcptr lp, struct sk_buff *skb);
 126void            llc_unit_data_request(llcptr lp, int ll, char * data);
 127void            llc_disconnect_request(llcptr lp);
 128void            llc_connect_request(llcptr lp);
 129void            llc_xid_request(llcptr lp, char opt, int data_len, char *pdu_data);
 130void            llc_test_request(llcptr lp, int data_len, char *pdu_data);
 131
 132int             register_cl2llc_client(llcptr llc, const char *device, void (*ops)(llcptr), u8 *rmac, u8 ssap, u8 dsap);
 133void            unregister_cl2llc_client(llcptr lp);
 134int             llc_mac_data_indicate(llcptr lp, struct sk_buff *skb );
 135
 136