projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | #ifndef _LAPB_H |
| 2 | #define _LAPB_H | |
| 3 | #include <linux/lapb.h> | |
| 4 | ||
| 5 | #define LAPB_HEADER_LEN 20 /* LAPB over Ethernet + a bit more */ | |
| 6 | ||
| 7 | #define LAPB_ACK_PENDING_CONDITION 0x01 | |
| 8 | #define LAPB_REJECT_CONDITION 0x02 | |
| 9 | #define LAPB_PEER_RX_BUSY_CONDITION 0x04 | |
| 10 | ||
| 11 | /* Control field templates */ | |
| 12 | #define LAPB_I 0x00 /* Information frames */ | |
| 13 | #define LAPB_S 0x01 /* Supervisory frames */ | |
| 14 | #define LAPB_U 0x03 /* Unnumbered frames */ | |
| 15 | ||
| 16 | #define LAPB_RR 0x01 /* Receiver ready */ | |
| 17 | #define LAPB_RNR 0x05 /* Receiver not ready */ | |
| 18 | #define LAPB_REJ 0x09 /* Reject */ | |
| 19 | ||
| 20 | #define LAPB_SABM 0x2F /* Set Asynchronous Balanced Mode */ | |
| 21 | #define LAPB_SABME 0x6F /* Set Asynchronous Balanced Mode Extended */ | |
| 22 | #define LAPB_DISC 0x43 /* Disconnect */ | |
| 23 | #define LAPB_DM 0x0F /* Disconnected mode */ | |
| 24 | #define LAPB_UA 0x63 /* Unnumbered acknowledge */ | |
| 25 | #define LAPB_FRMR 0x87 /* Frame reject */ | |
| 26 | ||
| 27 | #define LAPB_ILLEGAL 0x100 /* Impossible to be a real frame type */ | |
| 28 | ||
| 29 | #define LAPB_SPF 0x10 /* Poll/final bit for standard LAPB */ | |
| 30 | #define LAPB_EPF 0x01 /* Poll/final bit for extended LAPB */ | |
| 31 | ||
| 32 | #define LAPB_FRMR_W 0x01 /* Control field invalid */ | |
| 33 | #define LAPB_FRMR_X 0x02 /* I field invalid */ | |
| 34 | #define LAPB_FRMR_Y 0x04 /* I field too long */ | |
| 35 | #define LAPB_FRMR_Z 0x08 /* Invalid N(R) */ | |
| 36 | ||
| 37 | #define LAPB_POLLOFF 0 | |
| 38 | #define LAPB_POLLON 1 | |
| 39 | ||
| 40 | /* LAPB C-bit */ | |
| 41 | #define LAPB_COMMAND 1 | |
| 42 | #define LAPB_RESPONSE 2 | |
| 43 | ||
| 44 | #define LAPB_ADDR_A 0x03 | |
| 45 | #define LAPB_ADDR_B 0x01 | |
| 46 | #define LAPB_ADDR_C 0x0F | |
| 47 | #define LAPB_ADDR_D 0x07 | |
| 48 | ||
| 49 | /* Define Link State constants. */ | |
| 50 | enum { | |
| 51 | LAPB_STATE_0, /* Disconnected State */ | |
| 52 | LAPB_STATE_1, /* Awaiting Connection State */ | |
| 53 | LAPB_STATE_2, /* Awaiting Disconnection State */ | |
| 54 | LAPB_STATE_3, /* Data Transfer State */ | |
| 55 | LAPB_STATE_4 /* Frame Reject State */ | |
| 56 | }; | |
| 57 | ||
| 58 | #define LAPB_DEFAULT_MODE (LAPB_STANDARD | LAPB_SLP | LAPB_DTE) | |
| 59 | #define LAPB_DEFAULT_WINDOW 7 /* Window=7 */ | |
| 60 | #define LAPB_DEFAULT_T1 (5 * HZ) /* T1=5s */ | |
| 61 | #define LAPB_DEFAULT_T2 (1 * HZ) /* T2=1s */ | |
| 62 | #define LAPB_DEFAULT_N2 20 /* N2=20 */ | |
| 63 | ||
| 64 | #define LAPB_SMODULUS 8 | |
| 65 | #define LAPB_EMODULUS 128 | |
| 66 | ||
| 67 | /* | |
| 68 | * Information about the current frame. | |
| 69 | */ | |
| 70 | struct lapb_frame { | |
| 71 | unsigned short type; /* Parsed type */ | |
| 72 | unsigned short nr, ns; /* N(R), N(S) */ | |
| 73 | unsigned char cr; /* Command/Response */ | |
| 74 | unsigned char pf; /* Poll/Final */ | |
| 75 | unsigned char control[2]; /* Original control data*/ | |
| 76 | }; | |
| 77 | ||
| 78 | /* | |
| 79 | * The per LAPB connection control structure. | |
| 80 | */ | |
| 81 | struct lapb_cb { | |
| 82 | struct list_head node; | |
| 83 | struct net_device *dev; | |
| 84 | ||
| 85 | /* Link status fields */ | |
| 86 | unsigned int mode; | |
| 87 | unsigned char state; | |
| 88 | unsigned short vs, vr, va; | |
| 89 | unsigned char condition; | |
| 90 | unsigned short n2, n2count; | |
| 91 | unsigned short t1, t2; | |
| 92 | struct timer_list t1timer, t2timer; | |
| 93 | ||
| 94 | /* Internal control information */ | |
| 95 | struct sk_buff_head write_queue; | |
| 96 | struct sk_buff_head ack_queue; | |
| 97 | unsigned char window; | |
| d97a077a | 98 | const struct lapb_register_struct *callbacks; |
| 1da177e4 LT |
99 | |
| 100 | /* FRMR control information */ | |
| 101 | struct lapb_frame frmr_data; | |
| 102 | unsigned char frmr_type; | |
| 103 | ||
| 104 | atomic_t refcnt; | |
| 105 | }; | |
| 106 | ||
| 107 | /* lapb_iface.c */ | |
| 108 | extern void lapb_connect_confirmation(struct lapb_cb *lapb, int); | |
| 109 | extern void lapb_connect_indication(struct lapb_cb *lapb, int); | |
| 110 | extern void lapb_disconnect_confirmation(struct lapb_cb *lapb, int); | |
| 111 | extern void lapb_disconnect_indication(struct lapb_cb *lapb, int); | |
| 112 | extern int lapb_data_indication(struct lapb_cb *lapb, struct sk_buff *); | |
| 113 | extern int lapb_data_transmit(struct lapb_cb *lapb, struct sk_buff *); | |
| 114 | ||
| 115 | /* lapb_in.c */ | |
| 116 | extern void lapb_data_input(struct lapb_cb *lapb, struct sk_buff *); | |
| 117 | ||
| 118 | /* lapb_out.c */ | |
| 119 | extern void lapb_kick(struct lapb_cb *lapb); | |
| 120 | extern void lapb_transmit_buffer(struct lapb_cb *lapb, struct sk_buff *, int); | |
| 121 | extern void lapb_establish_data_link(struct lapb_cb *lapb); | |
| 122 | extern void lapb_enquiry_response(struct lapb_cb *lapb); | |
| 123 | extern void lapb_timeout_response(struct lapb_cb *lapb); | |
| 124 | extern void lapb_check_iframes_acked(struct lapb_cb *lapb, unsigned short); | |
| 125 | extern void lapb_check_need_response(struct lapb_cb *lapb, int, int); | |
| 126 | ||
| 127 | /* lapb_subr.c */ | |
| 128 | extern void lapb_clear_queues(struct lapb_cb *lapb); | |
| 129 | extern void lapb_frames_acked(struct lapb_cb *lapb, unsigned short); | |
| 130 | extern void lapb_requeue_frames(struct lapb_cb *lapb); | |
| 131 | extern int lapb_validate_nr(struct lapb_cb *lapb, unsigned short); | |
| 132 | extern int lapb_decode(struct lapb_cb *lapb, struct sk_buff *, struct lapb_frame *); | |
| 133 | extern void lapb_send_control(struct lapb_cb *lapb, int, int, int); | |
| 134 | extern void lapb_transmit_frmr(struct lapb_cb *lapb); | |
| 135 | ||
| 136 | /* lapb_timer.c */ | |
| 137 | extern void lapb_start_t1timer(struct lapb_cb *lapb); | |
| 138 | extern void lapb_start_t2timer(struct lapb_cb *lapb); | |
| 139 | extern void lapb_stop_t1timer(struct lapb_cb *lapb); | |
| 140 | extern void lapb_stop_t2timer(struct lapb_cb *lapb); | |
| 141 | extern int lapb_t1timer_running(struct lapb_cb *lapb); | |
| 142 | ||
| 143 | /* | |
| 144 | * Debug levels. | |
| 145 | * 0 = Off | |
| 146 | * 1 = State Changes | |
| 147 | * 2 = Packets I/O and State Changes | |
| 148 | * 3 = Hex dumps, Packets I/O and State Changes. | |
| 149 | */ | |
| 150 | #define LAPB_DEBUG 0 | |
| 151 | ||
| a508da6c JP |
152 | #define lapb_dbg(level, fmt, ...) \ |
| 153 | do { \ | |
| 154 | if (level < LAPB_DEBUG) \ | |
| 155 | pr_debug(fmt, ##__VA_ARGS__); \ | |
| 156 | } while (0) | |
| 157 | ||
| 1da177e4 | 158 | #endif |