i386/linux/linux-2.3.21/include/net/llc.h

   1 #include <linux/skbuff.h>
   2
   3 #define LLC_MODULE
   4
   5 typedef struct llc_struct llc;
   6 typedef struct llc_struct *llcptr;
   7
   8 /*
   9  *      LLC private data area structure.
  10  */
  11
  12 struct 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
 108 void            llc_cancel_timers(llcptr lp);
 109 int             llc_decode_frametype(frameptr fr);
 110 llcptr          llc_find(void);
 111 int             llc_free_acknowledged_skbs(llcptr lp, unsigned char ack);
 112 void            llc_handle_xid_indication( char *chsp, short int ll, char *xid_data);
 113 void            llc_interpret_pseudo_code(llcptr lp, int pc_label, struct sk_buff *skb, char type);
 114 void            llc_add_to_queue(struct sk_buff *skb, struct sk_buff **f, struct sk_buff **b);
 115 void            llc_process_otype2_frame(llcptr lp, struct sk_buff *skb, char type);
 116 struct sk_buff *llc_pull_from_atq(llcptr lp);
 117 int             llc_resend_ipdu(llcptr lp, unsigned char ack_nr, unsigned char type, char p);
 118 void            llc_sendpdu(llcptr lp, char type, char pf, int data_len, char *pdu_data);
 119 void            llc_sendipdu(llcptr lp, char type, char pf, struct sk_buff *skb);
 120 void            llc_start_timer(llcptr lp, int t);
 121 void            llc_stop_timer(llcptr lp, int t);
 122 void            llc_timer_expired(llcptr lp, int t);
 123 int             llc_validate_seq_nos(llcptr lp, frameptr fr);
 124
 125 int             llc_data_request(llcptr lp, struct sk_buff *skb);
 126 void            llc_unit_data_request(llcptr lp, int ll, char * data);
 127 void            llc_disconnect_request(llcptr lp);
 128 void            llc_connect_request(llcptr lp);
 129 void            llc_xid_request(llcptr lp, char opt, int data_len, char *pdu_data);
 130 void            llc_test_request(llcptr lp, int data_len, char *pdu_data);
 131
 132 int             register_cl2llc_client(llcptr llc, const char *device, void (*ops)(llcptr), u8 *rmac, u8 ssap, u8 dsap);
 133 void            unregister_cl2llc_client(llcptr lp);
 134 int             llc_mac_data_indicate(llcptr lp, struct sk_buff *skb );
 135