1*41705Ssklower /* 2*41705Ssklower * Copyright (c) University of British Columbia, 1984 3*41705Ssklower * Copyright (c) 1990 The Regents of the University of California. 4*41705Ssklower * All rights reserved. 5*41705Ssklower * 6*41705Ssklower * This code is derived from software contributed to Berkeley by 7*41705Ssklower * the Laboratory for Computation Vision and the Computer Science Department 8*41705Ssklower * of the University of British Columbia. 9*41705Ssklower * 10*41705Ssklower * %sccs.include.redist.c% 11*41705Ssklower * 12*41705Ssklower * @(#)hd_var.h 7.2 (Berkeley) 05/11/90 13*41705Ssklower */ 1441589Ssklower 1541589Ssklower /* 1641589Ssklower * 1741589Ssklower * hdlc control block 1841589Ssklower * 1941589Ssklower */ 2041589Ssklower 2141589Ssklower struct hdtxq { 2241589Ssklower struct mbuf *head; 2341589Ssklower struct mbuf *tail; 2441589Ssklower }; 2541589Ssklower 2641589Ssklower struct hdcb { 2741589Ssklower struct hdcb *hd_next; /* pointer to next hdlc control block */ 2841589Ssklower char hd_state; /* link state */ 2941589Ssklower char hd_vs; /* send state variable */ 3041589Ssklower char hd_vr; /* receive state variable */ 3141589Ssklower char hd_lastrxnr; /* last received N(R) */ 3241589Ssklower char hd_lasttxnr; /* last transmitted N(R) */ 3341589Ssklower char hd_condition; 3441589Ssklower #define TIMER_RECOVERY_CONDITION 0x01 3541589Ssklower #define REJ_CONDITION 0x02 3641589Ssklower #define REMOTE_RNR_CONDITION 0X04 3741589Ssklower char hd_retxcnt; 3841589Ssklower char hd_xx; 3941589Ssklower struct hdtxq hd_txq; 4041589Ssklower struct mbuf *hd_retxq[MODULUS]; 4141589Ssklower char hd_retxqi; 4241589Ssklower char hd_rrtimer; 4341589Ssklower char hd_timer; 4441589Ssklower #define SET_TIMER(hdp) hdp->hd_timer = hd_t1 4541589Ssklower #define KILL_TIMER(hdp) hdp->hd_timer = 0 4641589Ssklower char hd_dontcopy; /* if-driver doesn't free I-frames */ 4741589Ssklower struct ifnet *hd_ifp; /* device's network visible interface */ 4841589Ssklower struct x25config *hd_xcp; /* copy of &hdp->hd_if->if_addr */ 4941589Ssklower 5041589Ssklower /* link statistics */ 5141589Ssklower 5241589Ssklower long hd_iframes_in; 5341589Ssklower long hd_iframes_out; 5441589Ssklower long hd_rrs_in; 5541589Ssklower long hd_rrs_out; 5641589Ssklower short hd_rejs_in; 5741589Ssklower short hd_rejs_out; 5841589Ssklower long hd_window_condition; 5941589Ssklower short hd_invalid_ns; 6041589Ssklower short hd_invalid_nr; 6141589Ssklower short hd_timeouts; 6241589Ssklower short hd_resets; 6341589Ssklower short hd_unknown; 6441589Ssklower short hd_frmrs_in; 6541589Ssklower short hd_frmrs_out; 6641589Ssklower short hd_rnrs_in; 6741589Ssklower short hd_rnrs_out; 6841589Ssklower }; 6941589Ssklower 7041589Ssklower #ifdef KERNEL 7141589Ssklower struct hdcb *hdcbhead; /* head of linked list of hdcb's */ 7241589Ssklower struct Frmr_frame hd_frmr; /* rejected frame diagnostic info */ 7341589Ssklower struct ifqueue hdintrq; /* hdlc packet input queue */ 7441589Ssklower 7541589Ssklower int hd_t1; /* timer T1 value */ 7641589Ssklower int hd_t3; /* RR send timer */ 7741589Ssklower int hd_n2; /* frame retransmission limit */ 7841589Ssklower #endif 79