text: /*
   * 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
   *
   * @(#)clnt_raw.c 1.22 87/08/11 Copyr 1984 Sun Micro
   * @(#)clnt_raw.c	2.2 88/08/01 4.0 RPCSRC
   * $NetBSD: clnt_raw.c,v 1.20 2000/12/10 04:12:03 christos Exp $
   * $FreeBSD: src/lib/libc/rpc/clnt_raw.c,v 1.20 2006/02/27 22:10:58 deischen Exp $
   * $DragonFly: src/lib/libc/rpc/clnt_raw.c,v 1.4 2005/11/13 12:27:04 swildner Exp $
   */
  
  /*
   * 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 similate rpc and get round trip overhead, without
   * any interference from the kernel.
   */
  
  #include "namespace.h"
  #include "reentrant.h"
  #include <assert.h>
  #include <err.h>
  #include <stdio.h>
  #include <stdlib.h>
  
  #include <rpc/rpc.h>
  #include <rpc/raw.h>
  #include "un-namespace.h"
  #include "mt_misc.h"
  
  #define MCALL_MSG_SIZE 24
  
  /*
   * This is the "network" we will be moving stuff over.
   */
  static struct clntraw_private {
  	CLIENT	client_object;
  	XDR	xdr_stream;
  	char	*_raw_buf;
  	union {
  	    struct rpc_msg	mashl_rpcmsg;
  	    char 		mashl_callmsg[MCALL_MSG_SIZE];
  	} u;
  	u_int	mcnt;
  } *clntraw_private;
  
  static void		 clnt_raw_abort(CLIENT *);
  static enum clnt_stat	 clnt_raw_call(CLIENT *, rpcproc_t, xdrproc_t, void *,
  				       xdrproc_t, void *, struct timeval);
  static bool_t		 clnt_raw_control(CLIENT *, u_int, void *);
  static void		 clnt_raw_destroy(CLIENT *);
  static bool_t		 clnt_raw_freeres(CLIENT *, xdrproc_t, void *);
  static void		 clnt_raw_geterr(CLIENT *, struct rpc_err *);
  static struct clnt_ops	*clnt_raw_ops(void);
  
  /*
   * Create a client handle for memory based rpc.
   */
  CLIENT *
  clnt_raw_create(rpcprog_t prog, rpcvers_t vers)
  {
  	struct clntraw_private *clp = clntraw_private;
  	struct rpc_msg call_msg;
  	XDR *xdrs = &clp->xdr_stream;
  	CLIENT	*client = &clp->client_object;
  
  	mutex_lock(&clntraw_lock);
  	if (clp == NULL) {
  		clp = (struct clntraw_private *)calloc(1, sizeof (*clp));
  		if (clp == NULL) {
  			mutex_unlock(&clntraw_lock);
  			return NULL;
  		}
  		if (__rpc_rawcombuf == NULL)
  			__rpc_rawcombuf =
  			    (char *)calloc(UDPMSGSIZE, sizeof (char));
  		clp->_raw_buf = __rpc_rawcombuf;
  		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;
  	/* XXX: prog and vers have been long historically :-( */
  	call_msg.rm_call.cb_prog = (u_int32_t)prog;
  	call_msg.rm_call.cb_vers = (u_int32_t)vers;
  	xdrmem_create(xdrs, clp->u.mashl_callmsg, MCALL_MSG_SIZE, XDR_ENCODE);
  	if (! xdr_callhdr(xdrs, &call_msg))
  		warnx("clntraw_create - 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 = clnt_raw_ops();
  	client->cl_auth = authnone_create();
  	mutex_unlock(&clntraw_lock);
  	return (client);
  }
  
  /* ARGSUSED */
  static enum clnt_stat
  clnt_raw_call(CLIENT *h, rpcproc_t proc, xdrproc_t xargs, void *argsp,
  	      xdrproc_t xresults, void *resultsp, struct timeval timeout)
  {
  	struct clntraw_private *clp = clntraw_private;
  	XDR *xdrs = &clp->xdr_stream;
  	struct rpc_msg msg;
  	enum clnt_stat status;
  	struct rpc_err error;
  
  	assert(h != NULL);
  
  	mutex_lock(&clntraw_lock);
  	if (clp == NULL) {
  		mutex_unlock(&clntraw_lock);
  		return (RPC_FAILED);
  	}
  	mutex_unlock(&clntraw_lock);
  
  call_again:
  	/*
  	 * send request
  	 */
  	xdrs->x_op = XDR_ENCODE;
  	XDR_SETPOS(xdrs, 0);
  	clp->u.mashl_rpcmsg.rm_xid ++ ;
  	if ((! XDR_PUTBYTES(xdrs, clp->u.mashl_callmsg, clp->mcnt)) ||
  	    (! XDR_PUTINT32(xdrs, &proc)) ||
  	    (! AUTH_MARSHALL(h->cl_auth, xdrs)) ||
  	    (! (*xargs)(xdrs, argsp))) {
  		return (RPC_CANTENCODEARGS);
  	}
  	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_common(FD_SETSIZE);
  
  	/*
  	 * 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)) {
  		/*
  		 * It's possible for xdr_replymsg() to fail partway
  		 * through its attempt to decode the result from the
  		 * server. If this happens, it will leave the reply
  		 * structure partially populated with dynamically
  		 * allocated memory. (This can happen if someone uses
  		 * clntudp_bufcreate() to create a CLIENT handle and
  		 * specifies a receive buffer size that is too small.)
  		 * This memory must be free()ed to avoid a leak.
  		 */
  		int op = xdrs->x_op;
  		xdrs->x_op = XDR_FREE;
  		xdr_replymsg(xdrs, &msg);
  		xdrs->x_op = op;
  		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, &msg))
  			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;
  			xdr_opaque_auth(xdrs, &(msg.acpted_rply.ar_verf));
  		}
  	}
  
  	return (status);
  }
  
  /*ARGSUSED*/
  static void
  clnt_raw_geterr(CLIENT *cl, struct rpc_err *err)
  {
  }
  
  
  /* ARGSUSED */
  static bool_t
  clnt_raw_freeres(CLIENT *cl, xdrproc_t xdr_res, void *res_ptr)
  {
  	struct clntraw_private *clp = clntraw_private;
  	XDR *xdrs = &clp->xdr_stream;
  	bool_t rval;
  
  	mutex_lock(&clntraw_lock);
  	if (clp == NULL) {
  		rval = (bool_t) RPC_FAILED;
  		mutex_unlock(&clntraw_lock);
  		return (rval);
  	}
  	mutex_unlock(&clntraw_lock);
  	xdrs->x_op = XDR_FREE;
  	return ((*xdr_res)(xdrs, res_ptr));
  }
  
  /*ARGSUSED*/
  static void
  clnt_raw_abort(CLIENT *cl)
  {
  }
  
  /*ARGSUSED*/
  static bool_t
  clnt_raw_control(CLIENT *cl, u_int ui, void *str)
  {
  	return (FALSE);
  }
  
  /*ARGSUSED*/
  static void
  clnt_raw_destroy(CLIENT *cl)
  {
  }
  
  static struct clnt_ops *
  clnt_raw_ops(void)
  {
  	static struct clnt_ops ops;
  
  	/* VARIABLES PROTECTED BY ops_lock: ops */
  
  	mutex_lock(&ops_lock);
  	if (ops.cl_call == NULL) {
  		ops.cl_call = clnt_raw_call;
  		ops.cl_abort = clnt_raw_abort;
  		ops.cl_geterr = clnt_raw_geterr;
  		ops.cl_freeres = clnt_raw_freeres;
  		ops.cl_destroy = clnt_raw_destroy;
  		ops.cl_control = clnt_raw_control;
  	}
  	mutex_unlock(&ops_lock);
  	return (&ops);
  }
  