2 * linux/include/linux/sunrpc/msg_prot.h
4 * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
7 #ifndef _LINUX_SUNRPC_MSGPROT_H_
8 #define _LINUX_SUNRPC_MSGPROT_H_
10 #ifdef __KERNEL__ /* user programs should get these from the rpc header files */
14 /* size of an XDR encoding unit in bytes, i.e. 32bit */
17 /* spec defines authentication flavor as an unsigned 32 bit integer */
18 typedef u32 rpc_authflavor_t;
20 enum rpc_auth_flavors {
27 RPC_AUTH_MAXFLAVOR = 8,
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,
40 /* Maximum size (in bytes) of an rpc credential or verifier */
41 #define RPC_MAX_AUTH_SIZE (400)
53 enum rpc_accept_stat {
56 RPC_PROG_MISMATCH = 2,
60 /* internal use only */
61 RPC_DROP_REPLY = 60000,
64 enum rpc_reject_stat {
72 RPC_AUTH_REJECTEDCRED = 2,
74 RPC_AUTH_REJECTEDVERF = 4,
76 /* RPCSEC_GSS errors */
77 RPCSEC_GSS_CREDPROBLEM = 13,
78 RPCSEC_GSS_CTXPROBLEM = 14
81 #define RPC_MAXNETNAMELEN 256
86 * "A record is composed of one or more record fragments. A record
87 * fragment is a four-byte header followed by 0 to (2**31) - 1 bytes of
88 * fragment data. The bytes encode an unsigned binary number; as with
89 * XDR integers, the byte order is from highest to lowest. The number
90 * encodes two values -- a boolean which indicates whether the fragment
91 * is the last fragment of the record (bit value 1 implies the fragment
92 * is the last fragment) and a 31-bit unsigned binary value which is the
93 * length in bytes of the fragment's data. The boolean value is the
94 * highest-order bit of the header; the length is the 31 low-order bits.
95 * (Note that this record specification is NOT in XDR standard form!)"
97 * The Linux RPC client always sends its requests in a single record
98 * fragment, limiting the maximum payload size for stream transports to
102 typedef __be32 rpc_fraghdr;
104 #define RPC_LAST_STREAM_FRAGMENT (1U << 31)
105 #define RPC_FRAGMENT_SIZE_MASK (~RPC_LAST_STREAM_FRAGMENT)
106 #define RPC_MAX_FRAGMENT_SIZE ((1U << 31) - 1)
109 * RPC call and reply header size as number of 32bit words (verifier
110 * size computed separately, see below)
112 #define RPC_CALLHDRSIZE (6)
113 #define RPC_REPHDRSIZE (4)
117 * Maximum RPC header size, including authentication,
118 * as number of 32bit words (see RFCs 1831, 1832).
120 * xid 1 xdr unit = 4 bytes
129 * body<RPC_MAX_AUTH_SIZE> 100 xdr units = 400 bytes
134 * body<RPC_MAX_AUTH_SIZE> 100 xdr units = 400 bytes
136 * TOTAL 210 xdr units = 840 bytes
138 #define RPC_MAX_HEADER_WITH_AUTH \
139 (RPC_CALLHDRSIZE + 2*(2+RPC_MAX_AUTH_SIZE/4))
141 #define RPC_MAX_REPHEADER_WITH_AUTH \
142 (RPC_REPHDRSIZE + (2 + RPC_MAX_AUTH_SIZE/4))
145 * RFC1833/RFC3530 rpcbind (v3+) well-known netid's.
147 #define RPCBIND_NETID_UDP "udp"
148 #define RPCBIND_NETID_TCP "tcp"
149 #define RPCBIND_NETID_UDP6 "udp6"
150 #define RPCBIND_NETID_TCP6 "tcp6"
151 #define RPCBIND_NETID_LOCAL "local"
154 * Note that RFC 1833 does not put any size restrictions on the
155 * netid string, but all currently defined netid's fit in 4 bytes.
157 #define RPCBIND_MAXNETIDLEN (4u)
160 * Universal addresses are introduced in RFC 1833 and further spelled
161 * out in RFC 3530. RPCBIND_MAXUADDRLEN defines a maximum byte length
162 * of a universal address for use in allocating buffers and character
165 * Quoting RFC 3530, section 2.2:
167 * For TCP over IPv4 and for UDP over IPv4, the format of r_addr is the
172 * The prefix, "h1.h2.h3.h4", is the standard textual form for
173 * representing an IPv4 address, which is always four octets long.
174 * Assuming big-endian ordering, h1, h2, h3, and h4, are respectively,
175 * the first through fourth octets each converted to ASCII-decimal.
176 * Assuming big-endian ordering, p1 and p2 are, respectively, the first
177 * and second octets each converted to ASCII-decimal. For example, if a
178 * host, in big-endian order, has an address of 0x0A010307 and there is
179 * a service listening on, in big endian order, port 0x020F (decimal
180 * 527), then the complete universal address is "10.1.3.7.2.15".
184 * For TCP over IPv6 and for UDP over IPv6, the format of r_addr is the
187 * x1:x2:x3:x4:x5:x6:x7:x8.p1.p2
189 * The suffix "p1.p2" is the service port, and is computed the same way
190 * as with universal addresses for TCP and UDP over IPv4. The prefix,
191 * "x1:x2:x3:x4:x5:x6:x7:x8", is the standard textual form for
192 * representing an IPv6 address as defined in Section 2.2 of [RFC2373].
193 * Additionally, the two alternative forms specified in Section 2.2 of
194 * [RFC2373] are also acceptable.
197 #include <linux/inet.h>
199 /* Maximum size of the port number part of a universal address */
200 #define RPCBIND_MAXUADDRPLEN sizeof(".255.255")
202 /* Maximum size of an IPv4 universal address */
203 #define RPCBIND_MAXUADDR4LEN \
204 (INET_ADDRSTRLEN + RPCBIND_MAXUADDRPLEN)
206 /* Maximum size of an IPv6 universal address */
207 #define RPCBIND_MAXUADDR6LEN \
208 (INET6_ADDRSTRLEN + RPCBIND_MAXUADDRPLEN)
210 /* Assume INET6_ADDRSTRLEN will always be larger than INET_ADDRSTRLEN... */
211 #define RPCBIND_MAXUADDRLEN RPCBIND_MAXUADDR6LEN
213 #endif /* __KERNEL__ */
214 #endif /* _LINUX_SUNRPC_MSGPROT_H_ */