Annotation of sys/netatalk/ddp.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: ddp.h,v 1.2 2005/12/11 17:21:53 deraadt Exp $ */
2:
3: /*
4: * Copyright (c) 1990,1991 Regents of The University of Michigan.
5: * All Rights Reserved.
6: *
7: * Permission to use, copy, modify, and distribute this software and
8: * its documentation for any purpose and without fee is hereby granted,
9: * provided that the above copyright notice appears in all copies and
10: * that both that copyright notice and this permission notice appear
11: * in supporting documentation, and that the name of The University
12: * of Michigan not be used in advertising or publicity pertaining to
13: * distribution of the software without specific, written prior
14: * permission. This software is supplied as is without expressed or
15: * implied warranties of any kind.
16: *
17: * Research Systems Unix Group
18: * The University of Michigan
19: * c/o Mike Clark
20: * 535 W. William Street
21: * Ann Arbor, Michigan
22: * +1-313-763-0525
23: * netatalk@itd.umich.edu
24: */
25:
26: /*
27: * The following is the contents of the COPYRIGHT file from the
28: * netatalk-1.4a2 distribution, from which this file is derived.
29: */
30: /*
31: * Copyright (c) 1990,1996 Regents of The University of Michigan.
32: *
33: * All Rights Reserved.
34: *
35: * Permission to use, copy, modify, and distribute this software and
36: * its documentation for any purpose and without fee is hereby granted,
37: * provided that the above copyright notice appears in all copies and
38: * that both that copyright notice and this permission notice appear
39: * in supporting documentation, and that the name of The University
40: * of Michigan not be used in advertising or publicity pertaining to
41: * distribution of the software without specific, written prior
42: * permission. This software is supplied as is without expressed or
43: * implied warranties of any kind.
44: *
45: * This product includes software developed by the University of
46: * California, Berkeley and its contributors.
47: *
48: * Solaris code is encumbered by the following:
49: *
50: * Copyright (C) 1996 by Sun Microsystems Computer Co.
51: *
52: * Permission to use, copy, modify, and distribute this software and
53: * its documentation for any purpose and without fee is hereby
54: * granted, provided that the above copyright notice appear in all
55: * copies and that both that copyright notice and this permission
56: * notice appear in supporting documentation. This software is
57: * provided "as is" without express or implied warranty.
58: *
59: * Research Systems Unix Group
60: * The University of Michigan
61: * c/o Wesley Craig
62: * 535 W. William Street
63: * Ann Arbor, Michigan
64: * +1-313-764-2278
65: * netatalk@umich.edu
66: */
67: /*
68: * None of the Solaris code mentioned is included in OpenBSD.
69: * This code also relies heavily on previous effort in FreeBSD and NetBSD.
70: */
71:
72: #ifndef _NETATALK_DDP_H_
73: #define _NETATALK_DDP_H_ 1
74:
75: /*
76: * <-1byte(8bits) ->
77: * +---------------+
78: * | 0 | hopc |len|
79: * +---------------+
80: * | len (cont) |
81: * +---------------+
82: * | |
83: * +- DDP csum -+
84: * | |
85: * +---------------+
86: * | |
87: * +- Dest NET -+
88: * | |
89: * +---------------+
90: * | |
91: * +- Src NET -+
92: * | |
93: * +---------------+
94: * | Dest NODE |
95: * +---------------+
96: * | Src NODE |
97: * +---------------+
98: * | Dest PORT |
99: * +---------------+
100: * | Src PORT |
101: * +---------------+
102: *
103: * On Apples, there is also a ddp_type field, after src_port. However,
104: * under this unix implementation, user level processes need to be able
105: * to set the ddp_type. In later revisions, the ddp_type may only be
106: * available in a raw_appletalk interface.
107: */
108:
109: struct elaphdr {
110: u_char el_dnode;
111: u_char el_snode;
112: u_char el_type;
113: };
114:
115: #define SZ_ELAPHDR 3
116:
117: #define ELAP_DDPSHORT 0x01
118: #define ELAP_DDPEXTEND 0x02
119:
120: /*
121: * Extended DDP header. Includes sickness for dealing with arbitrary
122: * bitfields on a little-endian arch.
123: */
124: struct ddpehdr {
125: union {
126: struct {
127: #if BYTE_ORDER == BIG_ENDIAN
128: unsigned int dub_pad:2;
129: unsigned int dub_hops:4;
130: unsigned int dub_len:10;
131: unsigned int dub_sum:16;
132: #endif
133: #if BYTE_ORDER == LITTLE_ENDIAN
134: unsigned int dub_sum:16;
135: unsigned int dub_len:10;
136: unsigned int dub_hops:4;
137: unsigned int dub_pad:2;
138: #endif
139: } du_bits;
140: unsigned int du_bytes;
141: } deh_u;
142: #define deh_pad deh_u.du_bits.dub_pad
143: #define deh_hops deh_u.du_bits.dub_hops
144: #define deh_len deh_u.du_bits.dub_len
145: #define deh_sum deh_u.du_bits.dub_sum
146: #define deh_bytes deh_u.du_bytes
147: u_short deh_dnet;
148: u_short deh_snet;
149: u_char deh_dnode;
150: u_char deh_snode;
151: u_char deh_dport;
152: u_char deh_sport;
153: };
154:
155: #define DDP_MAXHOPS 15
156:
157: struct ddpshdr {
158: union {
159: struct {
160: #if BYTE_ORDER == BIG_ENDIAN
161: unsigned int dub_pad:6;
162: unsigned int dub_len:10;
163: unsigned int dub_dport:8;
164: unsigned int dub_sport:8;
165: #endif
166: #if BYTE_ORDER == LITTLE_ENDIAN
167: unsigned int dub_sport:8;
168: unsigned int dub_dport:8;
169: unsigned int dub_len:10;
170: unsigned int dub_pad:6;
171: #endif
172: } du_bits;
173: unsigned int du_bytes;
174: } dsh_u;
175: #define dsh_pad dsh_u.du_bits.dub_pad
176: #define dsh_len dsh_u.du_bits.dub_len
177: #define dsh_dport dsh_u.du_bits.dub_dport
178: #define dsh_sport dsh_u.du_bits.dub_sport
179: #define dsh_bytes dsh_u.du_bytes
180: };
181: #endif /* _NETATALK_DDP_H_ */
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