/* SPDX-License-Identifier: GPL-2.0 */
/*
* linux/include/linux/sunrpc/msg_prot.h
*
* Copyright (C) 1996, Olaf Kirch <[email protected]>
*/
#ifndef _LINUX_SUNRPC_MSGPROT_H_
#define _LINUX_SUNRPC_MSGPROT_H_
#define RPC_VERSION 2
/* spec defines authentication flavor as an unsigned 32 bit integer */
typedef u32 rpc_authflavor_t;
enum rpc_auth_flavors {
RPC_AUTH_NULL = 0,
RPC_AUTH_UNIX = 1,
RPC_AUTH_SHORT = 2,
RPC_AUTH_DES = 3,
RPC_AUTH_KRB = 4,
RPC_AUTH_GSS = 6,
RPC_AUTH_TLS = 7,
RPC_AUTH_MAXFLAVOR = 8,
/* pseudoflavors: */
RPC_AUTH_GSS_KRB5 = 390003,
RPC_AUTH_GSS_KRB5I = 390004,
RPC_AUTH_GSS_KRB5P = 390005,
RPC_AUTH_GSS_LKEY = 390006,
RPC_AUTH_GSS_LKEYI = 390007,
RPC_AUTH_GSS_LKEYP = 390008,
RPC_AUTH_GSS_SPKM = 390009,
RPC_AUTH_GSS_SPKMI = 390010,
RPC_AUTH_GSS_SPKMP = 390011,
};
/* Maximum size (in octets) of the machinename in an AUTH_UNIX
* credential (per RFC 5531 Appendix A)
*/
#define RPC_MAX_MACHINENAME (255)
/* Maximum size (in bytes) of an rpc credential or verifier */
#define RPC_MAX_AUTH_SIZE (400)
enum rpc_msg_type {
RPC_CALL = 0,
RPC_REPLY = 1
};
enum rpc_reply_stat {
RPC_MSG_ACCEPTED = 0,
RPC_MSG_DENIED = 1
};
enum rpc_accept_stat {
RPC_SUCCESS = 0,
RPC_PROG_UNAVAIL = 1,
RPC_PROG_MISMATCH = 2,
RPC_PROC_UNAVAIL = 3,
RPC_GARBAGE_ARGS = 4,
RPC_SYSTEM_ERR = 5,
/* internal use only */
RPC_DROP_REPLY = 60000,
};
enum rpc_reject_stat {
RPC_MISMATCH = 0,
RPC_AUTH_ERROR = 1
};
enum rpc_auth_stat {
RPC_AUTH_OK = 0,
RPC_AUTH_BADCRED = 1,
RPC_AUTH_REJECTEDCRED = 2,
RPC_AUTH_BADVERF = 3,
RPC_AUTH_REJECTEDVERF = 4,
RPC_AUTH_TOOWEAK = 5,
/* RPCSEC_GSS errors */
RPCSEC_GSS_CREDPROBLEM = 13,
RPCSEC_GSS_CTXPROBLEM = 14
};
#define RPC_MAXNETNAMELEN 256
/*
* From RFC 1831:
*
* "A record is composed of one or more record fragments. A record
* fragment is a four-byte header followed by 0 to (2**31) - 1 bytes of
* fragment data. The bytes encode an unsigned binary number; as with
* XDR integers, the byte order is from highest to lowest. The number
* encodes two values -- a boolean which indicates whether the fragment
* is the last fragment of the record (bit value 1 implies the fragment
* is the last fragment) and a 31-bit unsigned binary value which is the
* length in bytes of the fragment's data. The boolean value is the
* highest-order bit of the header; the length is the 31 low-order bits.
* (Note that this record specification is NOT in XDR standard form!)"
*
* The Linux RPC client always sends its requests in a single record
* fragment, limiting the maximum payload size for stream transports to
* 2GB.
*/
typedef __be32 rpc_fraghdr;
#define RPC_LAST_STREAM_FRAGMENT (1U << 31)
#define RPC_FRAGMENT_SIZE_MASK (~RPC_LAST_STREAM_FRAGMENT)
#define RPC_MAX_FRAGMENT_SIZE ((1U << 31) - 1)
/*
* RPC call and reply header size as number of 32bit words (verifier
* size computed separately, see below)
*/
#define RPC_CALLHDRSIZE (6)
#define RPC_REPHDRSIZE (4)
/*
* Maximum RPC header size, including authentication,
* as number of 32bit words (see RFCs 1831, 1832).
*
* xid 1 xdr unit = 4 bytes
* mtype 1
* rpc_version 1
* program 1
* prog_version 1
* procedure 1
* cred {
* flavor 1
* length 1
* body<RPC_MAX_AUTH_SIZE> 100 xdr units = 400 bytes
* }
* verf {
* flavor 1
* length 1
* body<RPC_MAX_AUTH_SIZE> 100 xdr units = 400 bytes
* }
* TOTAL 210 xdr units = 840 bytes
*/
#define RPC_MAX_HEADER_WITH_AUTH \
(RPC_CALLHDRSIZE + 2*(2+RPC_MAX_AUTH_SIZE/4))
#define RPC_MAX_REPHEADER_WITH_AUTH \
(RPC_REPHDRSIZE + (2 + RPC_MAX_AUTH_SIZE/4))
/*
* Well-known netids. See:
*
* https://www.iana.org/assignments/rpc-netids/rpc-netids.xhtml
*/
#define RPCBIND_NETID_UDP "udp"
#define RPCBIND_NETID_TCP "tcp"
#define RPCBIND_NETID_RDMA "rdma"
#define RPCBIND_NETID_SCTP "sctp"
#define RPCBIND_NETID_UDP6 "udp6"
#define RPCBIND_NETID_TCP6 "tcp6"
#define RPCBIND_NETID_RDMA6 "rdma6"
#define RPCBIND_NETID_SCTP6 "sctp6"
#define RPCBIND_NETID_LOCAL "local"
/*
* Note that RFC 1833 does not put any size restrictions on the
* netid string, but all currently defined netid's fit in 5 bytes.
*/
#define RPCBIND_MAXNETIDLEN (5u)
/*
* Universal addresses are introduced in RFC 1833 and further spelled
* out in RFC 3530. RPCBIND_MAXUADDRLEN defines a maximum byte length
* of a universal address for use in allocating buffers and character
* arrays.
*
* Quoting RFC 3530, section 2.2:
*
* For TCP over IPv4 and for UDP over IPv4, the format of r_addr is the
* US-ASCII string:
*
* h1.h2.h3.h4.p1.p2
*
* The prefix, "h1.h2.h3.h4", is the standard textual form for
* representing an IPv4 address, which is always four octets long.
* Assuming big-endian ordering, h1, h2, h3, and h4, are respectively,
* the first through fourth octets each converted to ASCII-decimal.
* Assuming big-endian ordering, p1 and p2 are, respectively, the first
* and second octets each converted to ASCII-decimal. For example, if a
* host, in big-endian order, has an address of 0x0A010307 and there is
* a service listening on, in big endian order, port 0x020F (decimal
* 527), then the complete universal address is "10.1.3.7.2.15".
*
* ...
*
* For TCP over IPv6 and for UDP over IPv6, the format of r_addr is the
* US-ASCII string:
*
* x1:x2:x3:x4:x5:x6:x7:x8.p1.p2
*
* The suffix "p1.p2" is the service port, and is computed the same way
* as with universal addresses for TCP and UDP over IPv4. The prefix,
* "x1:x2:x3:x4:x5:x6:x7:x8", is the standard textual form for
* representing an IPv6 address as defined in Section 2.2 of [RFC2373].
* Additionally, the two alternative forms specified in Section 2.2 of
* [RFC2373] are also acceptable.
*/
#include <linux/inet.h>
/* Maximum size of the port number part of a universal address */
#define RPCBIND_MAXUADDRPLEN sizeof(".255.255")
/* Maximum size of an IPv4 universal address */
#define RPCBIND_MAXUADDR4LEN \
(INET_ADDRSTRLEN + RPCBIND_MAXUADDRPLEN)
/* Maximum size of an IPv6 universal address */
#define RPCBIND_MAXUADDR6LEN \
(INET6_ADDRSTRLEN + RPCBIND_MAXUADDRPLEN)
/* Assume INET6_ADDRSTRLEN will always be larger than INET_ADDRSTRLEN... */
#define RPCBIND_MAXUADDRLEN RPCBIND_MAXUADDR6LEN
#endif /* _LINUX_SUNRPC_MSGPROT_H_ */
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