sunrpc/rpc/rpc_msg.h

   1 /*
   2  * rpc_msg.h
   3  * rpc message definition
   4  *
   5  * Copyright (c) 2010, Oracle America, Inc.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions are
   9  * met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above
  14  *       copyright notice, this list of conditions and the following
  15  *       disclaimer in the documentation and/or other materials
  16  *       provided with the distribution.
  17  *     * Neither the name of the "Oracle America, Inc." nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  *   FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  25  *   COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  26  *   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  *   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  28  *   GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  29  *   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  30  *   WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  31  *   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  32  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  33  */
  34
  35 #ifndef _RPC_MSG_H
  36 #define _RPC_MSG_H 1
  37
  38 #include <sys/cdefs.h>
  39
  40 #include <rpc/xdr.h>
  41 #include <rpc/clnt.h>
  42
  43 #define RPC_MSG_VERSION         ((u_long) 2)
  44 #define RPC_SERVICE_PORT        ((u_short) 2048)
  45
  46 __BEGIN_DECLS
  47
  48 /*
  49  * Bottom up definition of an rpc message.
  50  * NOTE: call and reply use the same overall struct but
  51  * different parts of unions within it.
  52  */
  53
  54 enum msg_type {
  55         CALL=0,
  56         REPLY=1
  57 };
  58
  59 enum reply_stat {
  60         MSG_ACCEPTED=0,
  61         MSG_DENIED=1
  62 };
  63
  64 enum accept_stat {
  65         SUCCESS=0,
  66         PROG_UNAVAIL=1,
  67         PROG_MISMATCH=2,
  68         PROC_UNAVAIL=3,
  69         GARBAGE_ARGS=4,
  70         SYSTEM_ERR=5
  71 };
  72
  73 enum reject_stat {
  74         RPC_MISMATCH=0,
  75         AUTH_ERROR=1
  76 };
  77
  78 /*
  79  * Reply part of an rpc exchange
  80  */
  81
  82 /*
  83  * Reply to an rpc request that was accepted by the server.
  84  * Note: there could be an error even though the request was
  85  * accepted.
  86  */
  87 struct accepted_reply {
  88         struct opaque_auth      ar_verf;
  89         enum accept_stat        ar_stat;
  90         union {
  91                 struct {
  92                         u_long  low;
  93                         u_long  high;
  94                 } AR_versions;
  95                 struct {
  96                         caddr_t where;
  97                         xdrproc_t proc;
  98                 } AR_results;
  99                 /* and many other null cases */
 100         } ru;
 101 #define ar_results      ru.AR_results
 102 #define ar_vers         ru.AR_versions
 103 };
 104
 105 /*
 106  * Reply to an rpc request that was rejected by the server.
 107  */
 108 struct rejected_reply {
 109         enum reject_stat rj_stat;
 110         union {
 111                 struct {
 112                         u_long low;
 113                         u_long high;
 114                 } RJ_versions;
 115                 enum auth_stat RJ_why;  /* why authentication did not work */
 116         } ru;
 117 #define rj_vers ru.RJ_versions
 118 #define rj_why  ru.RJ_why
 119 };
 120
 121 /*
 122  * Body of a reply to an rpc request.
 123  */
 124 struct reply_body {
 125         enum reply_stat rp_stat;
 126         union {
 127                 struct accepted_reply RP_ar;
 128                 struct rejected_reply RP_dr;
 129         } ru;
 130 #define rp_acpt ru.RP_ar
 131 #define rp_rjct ru.RP_dr
 132 };
 133
 134 /*
 135  * Body of an rpc request call.
 136  */
 137 struct call_body {
 138         u_long cb_rpcvers;      /* must be equal to two */
 139         u_long cb_prog;
 140         u_long cb_vers;
 141         u_long cb_proc;
 142         struct opaque_auth cb_cred;
 143         struct opaque_auth cb_verf; /* protocol specific - provided by client */
 144 };
 145
 146 /*
 147  * The rpc message
 148  */
 149 struct rpc_msg {
 150         u_long                  rm_xid;
 151         enum msg_type           rm_direction;
 152         union {
 153                 struct call_body RM_cmb;
 154                 struct reply_body RM_rmb;
 155         } ru;
 156 #define rm_call         ru.RM_cmb
 157 #define rm_reply        ru.RM_rmb
 158 };
 159 #define acpted_rply     ru.RM_rmb.ru.RP_ar
 160 #define rjcted_rply     ru.RM_rmb.ru.RP_dr
 161
 162
 163 /*
 164  * XDR routine to handle a rpc message.
 165  * xdr_callmsg(xdrs, cmsg)
 166  *      XDR *xdrs;
 167  *      struct rpc_msg *cmsg;
 168  */
 169 extern bool_t   xdr_callmsg (XDR *__xdrs, struct rpc_msg *__cmsg) __THROW;
 170
 171 /*
 172  * XDR routine to pre-serialize the static part of a rpc message.
 173  * xdr_callhdr(xdrs, cmsg)
 174  *      XDR *xdrs;
 175  *      struct rpc_msg *cmsg;
 176  */
 177 extern bool_t   xdr_callhdr (XDR *__xdrs, struct rpc_msg *__cmsg) __THROW;
 178
 179 /*
 180  * XDR routine to handle a rpc reply.
 181  * xdr_replymsg(xdrs, rmsg)
 182  *      XDR *xdrs;
 183  *      struct rpc_msg *rmsg;
 184  */
 185 extern bool_t   xdr_replymsg (XDR *__xdrs, struct rpc_msg *__rmsg) __THROW;
 186
 187 /*
 188  * Fills in the error part of a reply message.
 189  * _seterr_reply(msg, error)
 190  *      struct rpc_msg *msg;
 191  *      struct rpc_err *error;
 192  */
 193 extern void     _seterr_reply (struct rpc_msg *__msg, struct rpc_err *__error)
 194      __THROW;
 195
 196 __END_DECLS
 197
 198 #endif /* rpc/rpc_msg.h */