libnsl/rpc/svc_raw.c

	svc_raw.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 *
 * Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */
/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
 * Portions of this source code were derived from Berkeley
 * 4.3 BSD under license from the Regents of the University of
 * California.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

/*
 * 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 kernal.
 *
 */

#include "mt.h"
#include "rpc_mt.h"
#include <rpc/rpc.h>
#include <sys/types.h>
#include <rpc/trace.h>
#include <rpc/raw.h>
#include <syslog.h>

#ifndef UDPMSGSIZE
#define UDPMSGSIZE 8800
#endif

/*
 * This is the "network" that we will be moving data over
 */
static struct svc_raw_private {
    char    *raw_buf;   /* should be shared with the cl handle */
    SVCXPRT *server;
    XDR xdr_stream;
    char    verf_body[MAX_AUTH_BYTES];
} *svc_raw_private;

static struct xp_ops *svc_raw_ops();
extern char *calloc();
extern void free();
extern mutex_t  svcraw_lock;


SVCXPRT *
svc_raw_create()
{
    struct svc_raw_private *srp;
    bool_t flag1 = FALSE, flag2 = FALSE;

/* VARIABLES PROTECTED BY svcraw_lock: svc_raw_private, srp */
    trace1(TR_svc_raw_create, 0);
    mutex_lock(&svcraw_lock);
    srp = svc_raw_private;
    if (srp == NULL) {
/* LINTED pointer alignment */
        srp = (struct svc_raw_private *)calloc(1, sizeof (*srp));
        if (srp == NULL) {
            syslog(LOG_ERR, "svc_raw_create: out of memory");
            mutex_unlock(&svcraw_lock);
            trace1(TR_svc_raw_create, 1);
            return ((SVCXPRT *)NULL);
        }
        flag1 = TRUE;
        if (_rawcombuf == NULL) {
            _rawcombuf = (char *)calloc(UDPMSGSIZE, sizeof (char));
            if (_rawcombuf == NULL) {
                free((char *)srp);
                syslog(LOG_ERR, "svc_raw_create: "
                    "out of memory");
                mutex_unlock(&svcraw_lock);
                trace1(TR_svc_raw_create, 1);
                return ((SVCXPRT *)NULL);
            }
            flag2 = TRUE;
        }
        srp->raw_buf = _rawcombuf; /* Share it with the client */
        svc_raw_private = srp;
    }
    if ((srp->server = svc_xprt_alloc()) == NULL) {
        if (flag2)
            free(svc_raw_private->raw_buf);
        if (flag1)
            free(svc_raw_private);
        mutex_unlock(&svcraw_lock);
        trace1(TR_svc_raw_create, 1);
        return ((SVCXPRT *)NULL);
    }
    /*
     * By convention, using FD_SETSIZE as the psuedo file descriptor
     */
    srp->server->xp_fd = FD_SETSIZE;
    srp->server->xp_port = 0;
    srp->server->xp_ops = svc_raw_ops();
    srp->server->xp_verf.oa_base = srp->verf_body;
    xdrmem_create(&srp->xdr_stream, srp->raw_buf, UDPMSGSIZE, XDR_DECODE);
    xprt_register(srp->server);
    mutex_unlock(&svcraw_lock);
    trace1(TR_svc_raw_create, 1);
    return (srp->server);
}

/*ARGSUSED*/
static enum xprt_stat
svc_raw_stat(xprt)
SVCXPRT *xprt; /* args needed to satisfy ANSI-C typechecking */
{
    trace1(TR_svc_raw_stat, 0);
    trace1(TR_svc_raw_stat, 1);
    return (XPRT_IDLE);
}

/*ARGSUSED*/
static bool_t
svc_raw_recv(xprt, msg)
    SVCXPRT *xprt;
    struct rpc_msg *msg;
{
    struct svc_raw_private *srp;
    XDR *xdrs;

    trace1(TR_svc_raw_recv, 0);
    mutex_lock(&svcraw_lock);
    srp = svc_raw_private;
    if (srp == NULL) {
        mutex_unlock(&svcraw_lock);
        trace1(TR_svc_raw_recv, 1);
        return (FALSE);
    }
    mutex_unlock(&svcraw_lock);

    xdrs = &srp->xdr_stream;
    xdrs->x_op = XDR_DECODE;
    (void) XDR_SETPOS(xdrs, 0);
    if (! xdr_callmsg(xdrs, msg)) {
        trace1(TR_svc_raw_recv, 1);
        return (FALSE);
    }
    trace1(TR_svc_raw_recv, 1);
    return (TRUE);
}

/*ARGSUSED*/
static bool_t
svc_raw_reply(xprt, msg)
    SVCXPRT *xprt;
    struct rpc_msg *msg;
{
    struct svc_raw_private *srp;
    XDR *xdrs;

    trace1(TR_svc_raw_reply, 0);
    mutex_lock(&svcraw_lock);
    srp = svc_raw_private;
    if (srp == NULL) {
        mutex_unlock(&svcraw_lock);
        trace1(TR_svc_raw_reply, 1);
        return (FALSE);
    }
    mutex_unlock(&svcraw_lock);

    xdrs = &srp->xdr_stream;
    xdrs->x_op = XDR_ENCODE;
    (void) XDR_SETPOS(xdrs, 0);
    if (! xdr_replymsg(xdrs, msg)) {
        trace1(TR_svc_raw_reply, 1);
        return (FALSE);
    }
    (void) XDR_GETPOS(xdrs);  /* called just for overhead */
    trace1(TR_svc_raw_reply, 1);
    return (TRUE);
}

/*ARGSUSED*/
static bool_t
svc_raw_getargs(xprt, xdr_args, args_ptr)
    SVCXPRT *xprt;
    xdrproc_t xdr_args;
    caddr_t args_ptr;
{
    struct svc_raw_private *srp;
    bool_t dummy1;

    trace1(TR_svc_raw_getargs, 0);
    mutex_lock(&svcraw_lock);
    srp = svc_raw_private;
    if (srp == NULL) {
        mutex_unlock(&svcraw_lock);
        trace1(TR_svc_raw_getargs, 1);
        return (FALSE);
    }
    mutex_unlock(&svcraw_lock);
    dummy1 = (*xdr_args)(&srp->xdr_stream, args_ptr);
    trace1(TR_svc_raw_getargs, 1);
    return (dummy1);
}

/*ARGSUSED*/
static bool_t
svc_raw_freeargs(xprt, xdr_args, args_ptr)
    SVCXPRT *xprt;
    xdrproc_t xdr_args;
    caddr_t args_ptr;
{
    struct svc_raw_private *srp;
    XDR *xdrs;
    bool_t dummy2;

    trace1(TR_svc_raw_freeargs, 0);
    mutex_lock(&svcraw_lock);
    srp = svc_raw_private;
    if (srp == NULL) {
        mutex_unlock(&svcraw_lock);
        trace1(TR_svc_raw_freeargs, 1);
        return (FALSE);
    }
    mutex_unlock(&svcraw_lock);

    xdrs = &srp->xdr_stream;
    xdrs->x_op = XDR_FREE;
    dummy2 = (*xdr_args)(xdrs, args_ptr);
    trace1(TR_svc_raw_freeargs, 1);
    return (dummy2);
}

/*ARGSUSED*/
static void
svc_raw_destroy(xprt)
SVCXPRT *xprt;
{
    trace1(TR_svc_raw_destroy, 0);
    trace1(TR_svc_raw_destroy, 1);
}

/*ARGSUSED*/
static bool_t
svc_raw_control(xprt, rq, in)
    SVCXPRT *xprt;
    const uint_t    rq;
    void        *in;
{
    trace3(TR_svc_raw_control, 0, xprt, rq);
    switch (rq) {
    case SVCGET_XID: /* fall through for now */
    default:
        trace1(TR_svc_raw_control, 1);
        return (FALSE);
    }
}

static struct xp_ops *
svc_raw_ops()
{
    static struct xp_ops ops;
    extern mutex_t ops_lock;

/* VARIABLES PROTECTED BY ops_lock: ops */

    trace1(TR_svc_raw_ops, 0);
    mutex_lock(&ops_lock);
    if (ops.xp_recv == NULL) {
        ops.xp_recv = svc_raw_recv;
        ops.xp_stat = svc_raw_stat;
        ops.xp_getargs = svc_raw_getargs;
        ops.xp_reply = svc_raw_reply;
        ops.xp_freeargs = svc_raw_freeargs;
        ops.xp_destroy = svc_raw_destroy;
        ops.xp_control = svc_raw_control;
    }
    mutex_unlock(&ops_lock);
    trace1(TR_svc_raw_ops, 1);
    return (&ops);
}