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 ); 135 136