source: rtems-libbsd/services/librpc/src/rpc/clnt_raw.c @ 20ec9e6

/*
 * 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 defined(LIBC_SCCS) && !defined(lint)
/*static char *sccsid = "from: @(#)clnt_raw.c 1.22 87/08/11 Copyr 1984 Sun Micro";*/
/*static char *sccsid = "from: @(#)clnt_raw.c   2.2 88/08/01 4.0 RPCSRC";*/
static char *rcsid = "$FreeBSD: src/lib/libc/rpc/clnt_raw.c,v 1.10 1999/08/28 00:00:36 peter Exp $";
#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 similate rpc and get round trip overhead, without
 * any interference from the kernel.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <rpc/rpc.h>
#include <stdlib.h>
#include <stdio.h>

#define MCALL_MSG_SIZE 24

/*
 * This is the "network" we will be moving stuff over.
 */
struct clnt_raw_private {
        CLIENT  client_object;
        XDR     xdr_stream;
        char    _raw_buf[UDPMSGSIZE];
        union {
            struct rpc_msg      mashl_rpcmsg;
            char                mashl_callmsg[MCALL_MSG_SIZE];
        } u;
        u_int   mcnt;
};
#define clntraw_private (rtems_rpc_task_variables->clnt_raw_private)

static enum clnt_stat   clntraw_call(CLIENT *h, rpcproc_t proc, xdrproc_t xargs, void *argsp, xdrproc_t xresults, void *resultsp, struct timeval timeout);
static void             clntraw_abort(void);
static void             clntraw_geterr(CLIENT *h, struct rpc_err*);
static bool_t           clntraw_freeres(CLIENT *, xdrproc_t, void*);
static bool_t           clntraw_control(CLIENT *, int, char *);
static void             clntraw_destroy(CLIENT *);

static 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 clnt_raw_private *clp = clntraw_private;
        struct rpc_msg call_msg;
        XDR *xdrs = &clp->xdr_stream;
        CLIENT  *client = &clp->client_object;

        if (clp == 0) {
                clp = (struct clnt_raw_private *)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->u.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,
        rpcproc_t proc,
        xdrproc_t xargs,
        void *argsp,
        xdrproc_t xresults,
        void *resultsp,
        struct timeval timeout )
{
        struct clnt_raw_private *clp = clntraw_private;
        XDR *xdrs = &clp->xdr_stream;
        struct rpc_msg msg;
        enum clnt_stat status;
        struct rpc_err error;

        if (clp == 0)
                return (RPC_FAILED);
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_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, struct rpc_err *err)
{
}


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

        if (clp == 0)
        {
                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, int request, char *info)
{
        return (FALSE);
}

static void
clntraw_destroy(CLIENT *cl)
{
}