text: /*
   * Copyright (c) 2006-2021, RT-Thread Development Team
   *
   * SPDX-License-Identifier: Apache-2.0
   *
   * Change Logs:
   * Date           Author       Notes
   */
  /* @(#)rpc_msg.h    2.1 88/07/29 4.0 RPCSRC */
  /*
   * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
   * unrestricted use provided that this legend is included on all tape
   * media and as a part of the software program in whole or part.  Users
   * may copy or modify Sun RPC without charge, but are not authorized
   * to license or distribute it to anyone else except as part of a product or
   * program developed by the user.
   *
   * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
   * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
   *
   * Sun RPC is provided with no support and without any obligation on the
   * part of Sun Microsystems, Inc. to assist in its use, correction,
   * modification or enhancement.
   *
   * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
   * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
   * OR ANY PART THEREOF.
   *
   * In no event will Sun Microsystems, Inc. be liable for any lost revenue
   * or profits or other special, indirect and consequential damages, even if
   * Sun has been advised of the possibility of such damages.
   *
   * Sun Microsystems, Inc.
   * 2550 Garcia Avenue
   * Mountain View, California  94043
   */
  /*      @(#)rpc_msg.h 1.7 86/07/16 SMI      */
  
  #ifndef _RPC_MSG_H
  #define _RPC_MSG_H 1
  
  #include <rpc/xdr.h>
  #include <rpc/clnt.h>
  
  /*
   * rpc_msg.h
   * rpc message definition
   *
   * Copyright (C) 1984, Sun Microsystems, Inc.
   */
  
  #define RPC_MSG_VERSION     ((unsigned long) 2)
  #define RPC_SERVICE_PORT    ((unsigned short) 2048)
  
  /*
   * Bottom up definition of an rpc message.
   * NOTE: call and reply use the same overall struct but
   * different parts of unions within it.
   */
  
  enum msg_type {
      CALL=0,
      REPLY=1
  };
  
  enum reply_stat {
      MSG_ACCEPTED=0,
      MSG_DENIED=1
  };
  
  enum accept_stat {
      SUCCESS=0,
      PROG_UNAVAIL=1,
      PROG_MISMATCH=2,
      PROC_UNAVAIL=3,
      GARBAGE_ARGS=4,
      SYSTEM_ERR=5
  };
  
  enum reject_stat {
      RPC_MISMATCH=0,
      AUTH_ERROR=1
  };
  
  /*
   * Reply part of an rpc exchange
   */
  
  /*
   * Reply to an rpc request that was accepted by the server.
   * Note: there could be an error even though the request was
   * accepted.
   */
  struct accepted_reply {
      struct opaque_auth  ar_verf;
      int                 ar_stat;
      union {
          struct {
              unsigned long   low;
              unsigned long   high;
          } AR_versions;
          struct {
              char*   where;
              xdrproc_t proc;
          } AR_results;
          /* and many other null cases */
      } ru;
  #define ar_results  ru.AR_results
  #define ar_vers     ru.AR_versions
  };
  
  /*
   * Reply to an rpc request that was rejected by the server.
   */
  struct rejected_reply {
      int rj_stat;
      union {
          struct {
              unsigned long low;
              unsigned long high;
          } RJ_versions;
          int RJ_why;  /* why authentication did not work */
      } ru;
  #define rj_vers ru.RJ_versions
  #define rj_why  ru.RJ_why
  };
  
  /*
   * Body of a reply to an rpc request.
   */
  struct reply_body {
      int rp_stat;
      union {
          struct accepted_reply RP_ar;
          struct rejected_reply RP_dr;
      } ru;
  #define rp_acpt ru.RP_ar
  #define rp_rjct ru.RP_dr
  };
  
  /*
   * Body of an rpc request call.
   */
  struct call_body {
      unsigned long cb_rpcvers;   /* must be equal to two */
      unsigned long cb_prog;
      unsigned long cb_vers;
      unsigned long cb_proc;
      struct opaque_auth cb_cred;
      struct opaque_auth cb_verf; /* protocol specific - provided by client */
  };
  
  /*
   * The rpc message
   */
  struct rpc_msg {
      unsigned long   rm_xid;
      int             rm_direction;
      union {
          struct call_body RM_cmb;
          struct reply_body RM_rmb;
      } ru;
  #define rm_call     ru.RM_cmb
  #define rm_reply    ru.RM_rmb
  };
  #define acpted_rply ru.RM_rmb.ru.RP_ar
  #define rjcted_rply ru.RM_rmb.ru.RP_dr
  
  
  /*
   * XDR routine to handle a rpc message.
   * xdr_callmsg(xdrs, cmsg)
   *  XDR *xdrs;
   *  struct rpc_msg *cmsg;
   */
  extern bool_t   xdr_callmsg (XDR *__xdrs, struct rpc_msg *__cmsg);
  
  /*
   * XDR routine to pre-serialize the static part of a rpc message.
   * xdr_callhdr(xdrs, cmsg)
   *  XDR *xdrs;
   *  struct rpc_msg *cmsg;
   */
  extern bool_t   xdr_callhdr (XDR *__xdrs, struct rpc_msg *__cmsg);
  
  /*
   * XDR routine to handle a rpc reply.
   * xdr_replymsg(xdrs, rmsg)
   *  XDR *xdrs;
   *  struct rpc_msg *rmsg;
   */
  extern bool_t   xdr_replymsg (XDR *__xdrs, struct rpc_msg *__rmsg);
  
  /*
   * Fills in the error part of a reply message.
   * _seterr_reply(msg, error)
   *  struct rpc_msg *msg;
   *  struct rpc_err *error;
   */
  extern void _seterr_reply (struct rpc_msg *__msg, struct rpc_err *__error);
  
  #endif /* rpc/rpc_msg.h */
  