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1.1 root 1: /*
2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * The contents of this file constitute Original Code as defined in and
7: * are subject to the Apple Public Source License Version 1.1 (the
8: * "License"). You may not use this file except in compliance with the
9: * License. Please obtain a copy of the License at
10: * http://www.apple.com/publicsource and read it before using this file.
11: *
12: * This Original Code and all software distributed under the License are
13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17: * License for the specific language governing rights and limitations
18: * under the License.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /*
23: * Copyright (c) University of British Columbia, 1984
24: * Copyright (c) 1990, 1993
25: * The Regents of the University of California. All rights reserved.
26: *
27: * This code is derived from software contributed to Berkeley by
28: * the Laboratory for Computation Vision and the Computer Science Department
29: * of the University of British Columbia.
30: *
31: * Redistribution and use in source and binary forms, with or without
32: * modification, are permitted provided that the following conditions
33: * are met:
34: * 1. Redistributions of source code must retain the above copyright
35: * notice, this list of conditions and the following disclaimer.
36: * 2. Redistributions in binary form must reproduce the above copyright
37: * notice, this list of conditions and the following disclaimer in the
38: * documentation and/or other materials provided with the distribution.
39: * 3. All advertising materials mentioning features or use of this software
40: * must display the following acknowledgement:
41: * This product includes software developed by the University of
42: * California, Berkeley and its contributors.
43: * 4. Neither the name of the University nor the names of its contributors
44: * may be used to endorse or promote products derived from this software
45: * without specific prior written permission.
46: *
47: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
48: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
49: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
50: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
51: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
52: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
53: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
54: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
55: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
56: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
57: * SUCH DAMAGE.
58: *
59: * @(#)hd_var.h 8.1 (Berkeley) 6/10/93
60: */
61:
62: /*
63: *
64: * hdlc control block
65: *
66: */
67:
68: struct hdtxq {
69: struct mbuf *head;
70: struct mbuf *tail;
71: };
72:
73: struct hdcb {
74: struct hdcb *hd_next; /* pointer to next hdlc control block */
75: char hd_state; /* link state */
76: char hd_vs; /* send state variable */
77: char hd_vr; /* receive state variable */
78: char hd_lastrxnr; /* last received N(R) */
79: char hd_lasttxnr; /* last transmitted N(R) */
80: char hd_condition;
81: #define TIMER_RECOVERY_CONDITION 0x01
82: #define REJ_CONDITION 0x02
83: #define REMOTE_RNR_CONDITION 0X04
84: char hd_retxcnt;
85: char hd_xx;
86: struct hdtxq hd_txq;
87: struct mbuf *hd_retxq[MODULUS];
88: char hd_retxqi;
89: char hd_rrtimer;
90: char hd_timer;
91: #define SET_TIMER(hdp) hdp->hd_timer = hd_t1
92: #define KILL_TIMER(hdp) hdp->hd_timer = 0
93: char hd_dontcopy; /* if-driver doesn't free I-frames */
94: struct ifnet *hd_ifp; /* device's network visible interface */
95: struct ifaddr *hd_ifa; /* device's X.25 network address */
96: struct x25config *hd_xcp;
97: caddr_t hd_pkp; /* Level III junk */
98: int (*hd_output)(); /* separate entry for HDLC direct output */
99:
100: /* link statistics */
101:
102: long hd_iframes_in;
103: long hd_iframes_out;
104: long hd_rrs_in;
105: long hd_rrs_out;
106: short hd_rejs_in;
107: short hd_rejs_out;
108: long hd_window_condition;
109: short hd_invalid_ns;
110: short hd_invalid_nr;
111: short hd_timeouts;
112: short hd_resets;
113: short hd_unknown;
114: short hd_frmrs_in;
115: short hd_frmrs_out;
116: short hd_rnrs_in;
117: short hd_rnrs_out;
118: };
119:
120: #ifdef KERNEL
121: struct hdcb *hdcbhead; /* head of linked list of hdcb's */
122: struct Frmr_frame hd_frmr; /* rejected frame diagnostic info */
123: struct ifqueue hdintrq; /* hdlc packet input queue */
124:
125: int hd_t1; /* timer T1 value */
126: int hd_t3; /* RR send timer */
127: int hd_n2; /* frame retransmission limit */
128: #endif
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