/*      $OpenBSD: svc_raw.c,v 1.13 2022/02/14 03:38:59 guenther Exp $ */

/*
 * Copyright (c) 2010, Oracle America, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 *       copyright notice, this list of conditions and the following
 *       disclaimer in the documentation and/or other materials
 *       provided with the distribution.
 *     * Neither the name of the "Oracle America, Inc." nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 *   FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 *   COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 *   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 *   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 *   GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 *   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 *   WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * svc_raw.c,   This a toy for simple testing and timing.
 * Interface to create an rpc client and server in the same UNIX process.
 * This lets us similate rpc and get rpc (round trip) overhead, without
 * any interference from the kernel.
 */

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


/*
 * This is the "network" that we will be moving data over
 */
static struct svcraw_private {
        char    _raw_buf[UDPMSGSIZE];
        SVCXPRT server;
        XDR     xdr_stream;
        char    verf_body[MAX_AUTH_BYTES];
} *svcraw_private;

static bool_t           svcraw_recv(SVCXPRT *xprt, struct rpc_msg *msg);
static enum xprt_stat   svcraw_stat(SVCXPRT *xprt);
static bool_t           svcraw_getargs(SVCXPRT *xprt, xdrproc_t xdr_args,
                            caddr_t args_ptr);
static bool_t           svcraw_reply(SVCXPRT *xprt, struct rpc_msg *msg);
static bool_t           svcraw_freeargs(SVCXPRT *xprt, xdrproc_t xdr_args,
                            caddr_t args_ptr);
static void             svcraw_destroy(SVCXPRT *xprt);

static const struct xp_ops server_ops = {
        svcraw_recv,
        svcraw_stat,
        svcraw_getargs,
        svcraw_reply,
        svcraw_freeargs,
        svcraw_destroy
};

SVCXPRT *
svcraw_create(void)
{
        struct svcraw_private *srp = svcraw_private;

        if (srp == NULL) {
                srp = calloc(1, sizeof (*srp));
                if (srp == NULL)
                        return (NULL);
        }
        srp->server.xp_sock = 0;
        srp->server.xp_port = 0;
        srp->server.xp_ops = &server_ops;
        srp->server.xp_verf.oa_base = srp->verf_body;
        xdrmem_create(&srp->xdr_stream, srp->_raw_buf, UDPMSGSIZE, XDR_FREE);
        return (&srp->server);
}

static enum xprt_stat
svcraw_stat(SVCXPRT *xprt)
{

        return (XPRT_IDLE);
}

static bool_t
svcraw_recv(SVCXPRT *xprt, struct rpc_msg *msg)
{
        struct svcraw_private *srp = svcraw_private;
        XDR *xdrs;

        if (srp == NULL)
                return (0);
        xdrs = &srp->xdr_stream;
        xdrs->x_op = XDR_DECODE;
        XDR_SETPOS(xdrs, 0);
        if (! xdr_callmsg(xdrs, msg))
               return (FALSE);
        return (TRUE);
}

static bool_t
svcraw_reply(SVCXPRT *xprt, struct rpc_msg *msg)
{
        struct svcraw_private *srp = svcraw_private;
        XDR *xdrs;

        if (srp == NULL)
                return (FALSE);
        xdrs = &srp->xdr_stream;
        xdrs->x_op = XDR_ENCODE;
        XDR_SETPOS(xdrs, 0);
        if (! xdr_replymsg(xdrs, msg))
               return (FALSE);
        (void)XDR_GETPOS(xdrs);  /* called just for overhead */
        return (TRUE);
}

static bool_t
svcraw_getargs(SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
{
        struct svcraw_private *srp = svcraw_private;

        if (srp == NULL)
                return (FALSE);
        return ((*xdr_args)(&srp->xdr_stream, args_ptr));
}

static bool_t
svcraw_freeargs(SVCXPRT *xprt, xdrproc_t xdr_args, caddr_t args_ptr)
{ 
        struct svcraw_private *srp = svcraw_private;
        XDR *xdrs;

        if (srp == NULL)
                return (FALSE);
        xdrs = &srp->xdr_stream;
        xdrs->x_op = XDR_FREE;
        return ((*xdr_args)(xdrs, args_ptr));
} 

static void
svcraw_destroy(SVCXPRT *xprt)
{
}