include/linux/sunrpc/msg_prot.h

   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 */
  18 typedef u32     rpc_authflavor_t;
  19
  20 enum 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
  43 enum rpc_msg_type {
  44         RPC_CALL = 0,
  45         RPC_REPLY = 1
  46 };
  47
  48 enum rpc_reply_stat {
  49         RPC_MSG_ACCEPTED = 0,
  50         RPC_MSG_DENIED = 1
  51 };
  52
  53 enum 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 };
  61
  62 enum rpc_reject_stat {
  63         RPC_MISMATCH = 0,
  64         RPC_AUTH_ERROR = 1
  65 };
  66
  67 enum rpc_auth_stat {
  68         RPC_AUTH_OK = 0,
  69         RPC_AUTH_BADCRED = 1,
  70         RPC_AUTH_REJECTEDCRED = 2,
  71         RPC_AUTH_BADVERF = 3,
  72         RPC_AUTH_REJECTEDVERF = 4,
  73         RPC_AUTH_TOOWEAK = 5,
  74         /* RPCSEC_GSS errors */
  75         RPCSEC_GSS_CREDPROBLEM = 13,
  76         RPCSEC_GSS_CTXPROBLEM = 14
  77 };
  78
  79 #define RPC_PMAP_PROGRAM        100000
  80 #define RPC_PMAP_VERSION        2
  81 #define RPC_PMAP_PORT           111
  82
  83 #define RPC_MAXNETNAMELEN       256
  84
  85 /*
  86  * From RFC 1831:
  87  *
  88  * "A record is composed of one or more record fragments.  A record
  89  *  fragment is a four-byte header followed by 0 to (2**31) - 1 bytes of
  90  *  fragment data.  The bytes encode an unsigned binary number; as with
  91  *  XDR integers, the byte order is from highest to lowest.  The number
  92  *  encodes two values -- a boolean which indicates whether the fragment
  93  *  is the last fragment of the record (bit value 1 implies the fragment
  94  *  is the last fragment) and a 31-bit unsigned binary value which is the
  95  *  length in bytes of the fragment's data.  The boolean value is the
  96  *  highest-order bit of the header; the length is the 31 low-order bits.
  97  *  (Note that this record specification is NOT in XDR standard form!)"
  98  *
  99  * The Linux RPC client always sends its requests in a single record
 100  * fragment, limiting the maximum payload size for stream transports to
 101  * 2GB.
 102  */
 103
 104 typedef __be32  rpc_fraghdr;
 105
 106 #define RPC_LAST_STREAM_FRAGMENT        (1U << 31)
 107 #define RPC_FRAGMENT_SIZE_MASK          (~RPC_LAST_STREAM_FRAGMENT)
 108 #define RPC_MAX_FRAGMENT_SIZE           ((1U << 31) - 1)
 109
 110 /*
 111  * RPC call and reply header size as number of 32bit words (verifier
 112  * size computed separately, see below)
 113  */
 114 #define RPC_CALLHDRSIZE         (6)
 115 #define RPC_REPHDRSIZE          (4)
 116
 117
 118 /*
 119  * Maximum RPC header size, including authentication,
 120  * as number of 32bit words (see RFCs 1831, 1832).
 121  *
 122  *      xid                         1 xdr unit = 4 bytes
 123  *      mtype                       1
 124  *      rpc_version                 1
 125  *      program                     1
 126  *      prog_version                1
 127  *      procedure                   1
 128  *      cred {
 129  *          flavor                  1
 130  *          length                  1
 131  *          body<RPC_MAX_AUTH_SIZE> 100 xdr units = 400 bytes
 132  *      }
 133  *      verf {
 134  *          flavor                  1
 135  *          length                  1
 136  *          body<RPC_MAX_AUTH_SIZE> 100 xdr units = 400 bytes
 137  *      }
 138  *      TOTAL                       210 xdr units = 840 bytes
 139  */
 140 #define RPC_MAX_HEADER_WITH_AUTH \
 141         (RPC_CALLHDRSIZE + 2*(2+RPC_MAX_AUTH_SIZE/4))
 142
 143
 144 #endif /* __KERNEL__ */
 145 #endif /* _LINUX_SUNRPC_MSGPROT_H_ */