/* @(#)clnt_raw.c	2.2 88/08/01 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
 */
#if 0
static char sccsid[] = "@(#)clnt_raw.c 1.22 87/08/11 Copyr 1984 Sun Micro";
#endif

/*
 * clnt_raw.c
 *
 * Copyright (C) 1984, Sun Microsystems, Inc.
 *
 * Memory based rpc for simple testing and timing.
 * Interface to create an rpc client and server in the same process.
 * This lets us simulate rpc and get round trip overhead, without
 * any interference from the kernel.
 */

#include <features.h>
#include "rpc_private.h"
#include <rpc/svc.h>
#include <rpc/xdr.h>


#define MCALL_MSG_SIZE 24

/*
 * This is the "network" we will be moving stuff over.
 */
struct clntraw_private_s
  {
    CLIENT client_object;
    XDR xdr_stream;
    char _raw_buf[UDPMSGSIZE];
    char mashl_callmsg[MCALL_MSG_SIZE];
    u_int mcnt;
  };
#ifdef __UCLIBC_HAS_THREADS__
#define clntraw_private (*(struct clntraw_private_s **)&RPC_THREAD_VARIABLE(clntraw_private_s))
#else
static struct clntraw_private_s *clntraw_private;
#endif

static enum clnt_stat clntraw_call (CLIENT *, u_long, xdrproc_t, caddr_t,
				    xdrproc_t, caddr_t, struct timeval);
static void clntraw_abort (void);
static void clntraw_geterr (CLIENT *, struct rpc_err *);
static bool_t clntraw_freeres (CLIENT *, xdrproc_t, caddr_t);
static bool_t clntraw_control (CLIENT *, int, char *);
static void clntraw_destroy (CLIENT *);

static const struct clnt_ops client_ops =
{
  clntraw_call,
  clntraw_abort,
  clntraw_geterr,
  clntraw_freeres,
  clntraw_destroy,
  clntraw_control
};

/*
 * Create a client handle for memory based rpc.
 */
CLIENT *
clntraw_create (u_long prog, u_long vers)
{
  struct clntraw_private_s *clp = clntraw_private;
  struct rpc_msg call_msg;
  XDR *xdrs = &clp->xdr_stream;
  CLIENT *client = &clp->client_object;

  if (clp == 0)
    {
      clp = (struct clntraw_private_s *) calloc (1, sizeof (*clp));
      if (clp == 0)
	return (0);
      clntraw_private = clp;
    }
  /*
   * pre-serialize the static part of the call msg and stash it away
   */
  call_msg.rm_direction = CALL;
  call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
  call_msg.rm_call.cb_prog = prog;
  call_msg.rm_call.cb_vers = vers;
  xdrmem_create (xdrs, clp->mashl_callmsg, MCALL_MSG_SIZE, XDR_ENCODE);
  if (!xdr_callhdr (xdrs, &call_msg))
    {
      perror (_ ("clnt_raw.c - Fatal header serialization error."));
    }
  clp->mcnt = XDR_GETPOS (xdrs);
  XDR_DESTROY (xdrs);

  /*
   * Set xdrmem for client/server shared buffer
   */
  xdrmem_create (xdrs, clp->_raw_buf, UDPMSGSIZE, XDR_FREE);

  /*
   * create client handle
   */
  client->cl_ops = &client_ops;
  client->cl_auth = authnone_create ();
  return client;
}

static enum clnt_stat
clntraw_call (CLIENT *h, u_long proc, xdrproc_t xargs, caddr_t argsp,
			  xdrproc_t xresults, caddr_t resultsp,
			  struct timeval timeout attribute_unused)
{
  struct clntraw_private_s *clp = clntraw_private;
  XDR *xdrs = &clp->xdr_stream;
  struct rpc_msg msg;
  enum clnt_stat status;
  struct rpc_err error;

  if (clp == NULL)
    return RPC_FAILED;
call_again:
  /*
   * send request
   */
  xdrs->x_op = XDR_ENCODE;
  XDR_SETPOS (xdrs, 0);
  ((struct rpc_msg *) clp->mashl_callmsg)->rm_xid++;
  if ((!XDR_PUTBYTES (xdrs, clp->mashl_callmsg, clp->mcnt)) ||
      (!XDR_PUTLONG (xdrs, (long *) &proc)) ||
      (!AUTH_MARSHALL (h->cl_auth, xdrs)) ||
      (!(*xargs) (xdrs, argsp)))
    {
      return (RPC_CANTENCODEARGS);
    }
  (void) XDR_GETPOS (xdrs);	/* called just to cause overhead */

  /*
   * We have to call server input routine here because this is
   * all going on in one process. Yuk.
   */
  svc_getreq (1);

  /*
   * get results
   */
  xdrs->x_op = XDR_DECODE;
  XDR_SETPOS (xdrs, 0);
  msg.acpted_rply.ar_verf = _null_auth;
  msg.acpted_rply.ar_results.where = resultsp;
  msg.acpted_rply.ar_results.proc = xresults;
  if (!xdr_replymsg (xdrs, &msg))
    return RPC_CANTDECODERES;
  _seterr_reply (&msg, &error);
  status = error.re_status;

  if (status == RPC_SUCCESS)
    {
      if (!AUTH_VALIDATE (h->cl_auth, &msg.acpted_rply.ar_verf))
	{
	  status = RPC_AUTHERROR;
	}
    }				/* end successful completion */
  else
    {
      if (AUTH_REFRESH (h->cl_auth))
	goto call_again;
    }				/* end of unsuccessful completion */

  if (status == RPC_SUCCESS)
    {
      if (!AUTH_VALIDATE (h->cl_auth, &msg.acpted_rply.ar_verf))
	{
	  status = RPC_AUTHERROR;
	}
      if (msg.acpted_rply.ar_verf.oa_base != NULL)
	{
	  xdrs->x_op = XDR_FREE;
	  (void) xdr_opaque_auth (xdrs, &(msg.acpted_rply.ar_verf));
	}
    }

  return status;
}

static void
clntraw_geterr (CLIENT *cl attribute_unused, struct rpc_err *err attribute_unused)
{
}


static bool_t
clntraw_freeres (CLIENT *cl attribute_unused, xdrproc_t xdr_res, caddr_t res_ptr)
{
  struct clntraw_private_s *clp = clntraw_private;
  XDR *xdrs = &clp->xdr_stream;
  bool_t rval;

  if (clp == NULL)
    {
      rval = (bool_t) RPC_FAILED;
      return rval;
    }
  xdrs->x_op = XDR_FREE;
  return (*xdr_res) (xdrs, res_ptr);
}

static void
clntraw_abort (void)
{
}

static bool_t
clntraw_control (CLIENT *cl attribute_unused, int i attribute_unused, char *c attribute_unused)
{
  return FALSE;
}

static void
clntraw_destroy (CLIENT *cl attribute_unused)
{
}
