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1/*
2 * linux/include/linux/sunrpc/msg_prot.h
3 *
4 * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
5 */
6
7#ifndef _LINUX_SUNRPC_MSGPROT_H_
8#define _LINUX_SUNRPC_MSGPROT_H_
9
10#ifdef __KERNEL__ /* user programs should get these from the rpc header files */
11
12#define RPC_VERSION 2
13
14/* size of an XDR encoding unit in bytes, i.e. 32bit */
15#define XDR_UNIT (4)
16
17/* spec defines authentication flavor as an unsigned 32 bit integer */
18typedef u32 rpc_authflavor_t;
19
20enum rpc_auth_flavors {
21 RPC_AUTH_NULL = 0,
22 RPC_AUTH_UNIX = 1,
23 RPC_AUTH_SHORT = 2,
24 RPC_AUTH_DES = 3,
25 RPC_AUTH_KRB = 4,
26 RPC_AUTH_GSS = 6,
27 RPC_AUTH_MAXFLAVOR = 8,
28 /* pseudoflavors: */
29 RPC_AUTH_GSS_KRB5 = 390003,
30 RPC_AUTH_GSS_KRB5I = 390004,
31 RPC_AUTH_GSS_KRB5P = 390005,
32 RPC_AUTH_GSS_LKEY = 390006,
33 RPC_AUTH_GSS_LKEYI = 390007,
34 RPC_AUTH_GSS_LKEYP = 390008,
35 RPC_AUTH_GSS_SPKM = 390009,
36 RPC_AUTH_GSS_SPKMI = 390010,
37 RPC_AUTH_GSS_SPKMP = 390011,
38};
39
40/* Maximum size (in bytes) of an rpc credential or verifier */
41#define RPC_MAX_AUTH_SIZE (400)
42
43enum rpc_msg_type {
44 RPC_CALL = 0,
45 RPC_REPLY = 1
46};
47
48enum rpc_reply_stat {
49 RPC_MSG_ACCEPTED = 0,
50 RPC_MSG_DENIED = 1
51};
52
53enum rpc_accept_stat {
54 RPC_SUCCESS = 0,
55 RPC_PROG_UNAVAIL = 1,
56 RPC_PROG_MISMATCH = 2,
57 RPC_PROC_UNAVAIL = 3,
58 RPC_GARBAGE_ARGS = 4,
59 RPC_SYSTEM_ERR = 5,
60 /* internal use only */
61 RPC_DROP_REPLY = 60000,
62};
63
64enum rpc_reject_stat {
65 RPC_MISMATCH = 0,
66 RPC_AUTH_ERROR = 1
67};
68
69enum rpc_auth_stat {
70 RPC_AUTH_OK = 0,
71 RPC_AUTH_BADCRED = 1,
72 RPC_AUTH_REJECTEDCRED = 2,
73 RPC_AUTH_BADVERF = 3,
74 RPC_AUTH_REJECTEDVERF = 4,
75 RPC_AUTH_TOOWEAK = 5,
76 /* RPCSEC_GSS errors */
77 RPCSEC_GSS_CREDPROBLEM = 13,
78 RPCSEC_GSS_CTXPROBLEM = 14
79};
80
81#define RPC_PMAP_PROGRAM 100000
82#define RPC_PMAP_VERSION 2
83#define RPC_PMAP_PORT 111
84
85#define RPC_MAXNETNAMELEN 256
86
87/*
88 * From RFC 1831:
89 *
90 * "A record is composed of one or more record fragments. A record
91 * fragment is a four-byte header followed by 0 to (2**31) - 1 bytes of
92 * fragment data. The bytes encode an unsigned binary number; as with
93 * XDR integers, the byte order is from highest to lowest. The number
94 * encodes two values -- a boolean which indicates whether the fragment
95 * is the last fragment of the record (bit value 1 implies the fragment
96 * is the last fragment) and a 31-bit unsigned binary value which is the
97 * length in bytes of the fragment's data. The boolean value is the
98 * highest-order bit of the header; the length is the 31 low-order bits.
99 * (Note that this record specification is NOT in XDR standard form!)"
100 *
101 * The Linux RPC client always sends its requests in a single record
102 * fragment, limiting the maximum payload size for stream transports to
103 * 2GB.
104 */
105
106typedef __be32 rpc_fraghdr;
107
108#define RPC_LAST_STREAM_FRAGMENT (1U << 31)
109#define RPC_FRAGMENT_SIZE_MASK (~RPC_LAST_STREAM_FRAGMENT)
110#define RPC_MAX_FRAGMENT_SIZE ((1U << 31) - 1)
111
112/*
113 * RPC call and reply header size as number of 32bit words (verifier
114 * size computed separately, see below)
115 */
116#define RPC_CALLHDRSIZE (6)
117#define RPC_REPHDRSIZE (4)
118
119
120/*
121 * Maximum RPC header size, including authentication,
122 * as number of 32bit words (see RFCs 1831, 1832).
123 *
124 * xid 1 xdr unit = 4 bytes
125 * mtype 1
126 * rpc_version 1
127 * program 1
128 * prog_version 1
129 * procedure 1
130 * cred {
131 * flavor 1
132 * length 1
133 * body<RPC_MAX_AUTH_SIZE> 100 xdr units = 400 bytes
134 * }
135 * verf {
136 * flavor 1
137 * length 1
138 * body<RPC_MAX_AUTH_SIZE> 100 xdr units = 400 bytes
139 * }
140 * TOTAL 210 xdr units = 840 bytes
141 */
142#define RPC_MAX_HEADER_WITH_AUTH \
143 (RPC_CALLHDRSIZE + 2*(2+RPC_MAX_AUTH_SIZE/4))
144
145
146#endif /* __KERNEL__ */
147#endif /* _LINUX_SUNRPC_MSGPROT_H_ */