msg_prot.h 3.6 KB

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