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/* $OpenBSD: clnt_raw.c,v 1.18 2015/05/04 09:43:51 jsg 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.
*/
/*
* clnt_raw.c
*
* 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 <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <rpc/rpc.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[UDPMSGSIZE];
char mashl_callmsg[MCALL_MSG_SIZE];
u_int mcnt;
} *clntraw_private;
static enum clnt_stat clntraw_call(CLIENT *, u_long, xdrproc_t, caddr_t,
xdrproc_t, caddr_t, struct timeval);
static void clntraw_abort(CLIENT *);
static void clntraw_geterr(CLIENT *, struct rpc_err *);
static bool_t clntraw_freeres(CLIENT *, xdrproc_t, caddr_t);
static bool_t clntraw_control(CLIENT *, u_int, void *);
static void clntraw_destroy(CLIENT *);
static struct clnt_ops client_ops = {
clntraw_call,
clntraw_abort,
clntraw_geterr,
clntraw_freeres,
clntraw_destroy,
clntraw_control
};
void svc_getreq(int rdfds);
/*
* Create a client handle for memory based rpc.
*/
CLIENT *
clntraw_create(u_long prog, u_long vers)
{
struct clntraw_private *clp = clntraw_private;
struct rpc_msg call_msg;
XDR *xdrs;
CLIENT *client;
if (clp == NULL) {
clp = (struct clntraw_private *)calloc(1, sizeof (*clp));
if (clp == NULL)
goto fail;
clntraw_private = clp;
}
xdrs = &clp->xdr_stream;
client = &clp->client_object;
/*
* 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))
goto fail;
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();
if (client->cl_auth == NULL)
goto fail;
return (client);
fail:
mem_free((caddr_t)clntraw_private, sizeof(*clntraw_private));
clntraw_private = NULL;
rpc_createerr.cf_stat = RPC_SYSTEMERROR;
rpc_createerr.cf_error.re_errno = errno;
return (NULL);
}
/* ARGSUSED */
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)
{
struct clntraw_private *clp = clntraw_private;
XDR *xdrs;
struct rpc_msg msg;
enum clnt_stat status;
struct rpc_err error;
if (clp == NULL)
return (RPC_FAILED);
xdrs = &clp->xdr_stream;
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)) {
/* xdr_replymsg() may have left some things allocated */
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))
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);
}
/*ARGSUSED*/
static void
clntraw_geterr(CLIENT *clnt, struct rpc_err *err)
{
}
/* ARGSUSED */
static bool_t
clntraw_freeres(CLIENT *cl, xdrproc_t xdr_res, caddr_t res_ptr)
{
struct clntraw_private *clp = clntraw_private;
XDR *xdrs;
bool_t rval;
if (clp == NULL) {
rval = (bool_t) RPC_FAILED;
return (rval);
}
xdrs = &clp->xdr_stream;
xdrs->x_op = XDR_FREE;
return ((*xdr_res)(xdrs, res_ptr));
}
/*ARGSUSED*/
static void
clntraw_abort(CLIENT *clnt)
{
}
/*ARGSUSED*/
static bool_t
clntraw_control(CLIENT *clnt, u_int i, void *v)
{
return (FALSE);
}
/*ARGSUSED*/
static void
clntraw_destroy(CLIENT *clnt)
{
}
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