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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 | #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 ); |