1 /* 2 * linux/include/linux/sunrpc/msg_prot.h 3 * 4 * Copyright (C) 1996, Olaf Kirch <[email protected]> 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 /* internal use only */ 61 RPC_DROP_REPLY = 60000, 62 }; 63 64 enum rpc_reject_stat { 65 RPC_MISMATCH = 0, 66 RPC_AUTH_ERROR = 1 67 }; 68 69 enum 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_MAXNETNAMELEN 256 82 83 /* 84 * From RFC 1831: 85 * 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!)" 96 * 97 * The Linux RPC client always sends its requests in a single record 98 * fragment, limiting the maximum payload size for stream transports to 99 * 2GB. 100 */ 101 102 typedef __be32 rpc_fraghdr; 103 104 #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) 107 108 /* 109 * RPC call and reply header size as number of 32bit words (verifier 110 * size computed separately, see below) 111 */ 112 #define RPC_CALLHDRSIZE (6) 113 #define RPC_REPHDRSIZE (4) 114 115 116 /* 117 * Maximum RPC header size, including authentication, 118 * as number of 32bit words (see RFCs 1831, 1832). 119 * 120 * xid 1 xdr unit = 4 bytes 121 * mtype 1 122 * rpc_version 1 123 * program 1 124 * prog_version 1 125 * procedure 1 126 * cred { 127 * flavor 1 128 * length 1 129 * body<RPC_MAX_AUTH_SIZE> 100 xdr units = 400 bytes 130 * } 131 * verf { 132 * flavor 1 133 * length 1 134 * body<RPC_MAX_AUTH_SIZE> 100 xdr units = 400 bytes 135 * } 136 * TOTAL 210 xdr units = 840 bytes 137 */ 138 #define RPC_MAX_HEADER_WITH_AUTH \ 139 (RPC_CALLHDRSIZE + 2*(2+RPC_MAX_AUTH_SIZE/4)) 140 141 142 #endif /* __KERNEL__ */ 143 #endif /* _LINUX_SUNRPC_MSGPROT_H_ */ 144